Biaxially oriented polyester film, adhesive polyester film and colored hard coat film

Biaxially oriented polyester film, adhesive film and colored hard film film

The present invention relates to biaxially oriented polyester film, adhesive film and colored hard film film. In more detail, it is related to the proper biaxially oriented polyester film, adhesive film, and colored hard film film used on the display surface of electronic displays such as CRT or liquid crystal display devices.

CRT monitors such as TVs and personal computers emit three types of light: blue light, green light and red light to display images. However, these displays also emit various intermediate colors between blue light and green light, or between green light and red light, and the problem of blurred image contrast occurs due to these intermediate colors. Therefore, with the rapid spread of personal computers and the increase in long-term use, there is a strong need to improve the above-mentioned problems.

To solve this problem, Japanese Patent Laid-Open No. 11-335639 discloses that when a protective film composed of a protective layer and an adhesive layer is pasted on the image display surface, carbon black is added to the adhesive layer. According to the publication, because the carbon black of the adhesive layer can increase the absorbance of each wavelength of the visible light band on average, it can inhibit the transmission of blue light and green light, and the intermediate color light of green light and red light, and make the image hue. The contrast is clear. However, the method of reducing the transmittance on average as in the Bulletin will reduce the light intensity of the picture tube itself, resulting in the disadvantage of lowering the brightness of the picture tube.

As a solution to the problem of the brightness reduction of the picture tube, Japanese Patent Application Laid-Open No. 58-153904 discloses the use of color filters with selective visible light transmittance to improve contrast and color purity. Also, plasma display As for the display device, a similar method is also disclosed on pages 72-77 of Volume 58 of Display Monthly (published by Technology Times Co., Ltd., April 2000). However, this type of color filter is externally mounted and is not integrally formed with the picture tube. Since there is an air layer between the picture tube and the outer film, it is very difficult to suppress the reflectivity of the external light, and it is easy to have the disadvantage of reducing the identification due to the external light.

In addition, Japanese Patent Application Laid-Open No. 57-5251 discloses that pigments are added to the glass of the picture tube, and glass that has selective absorption of visible light is used. However, due to the very high manufacturing cost of this method, it cannot be commercialized at present. In addition, in recent years, the enlarged and planarized picture tube has a large difference in the thickness of the glass between the center part and the peripheral part of the picture tube. Therefore, it is extremely difficult to achieve uniform selective absorption of the pigment addition method as disclosed in the publication.

Therefore, there is a great desire to provide an optical protective film that can overcome the above-mentioned shortcomings for pasting on image display surfaces such as CRTs or liquid crystal display devices without reducing brightness, but improving contrast and color purity. Moreover, in addition to improving the contrast and color purity without reducing the brightness, the optical protective film is also eager to simplify the process, improve the operability of the adhesive layer, improve the transparency, prevent the deterioration of the visibility due to external light, and improve the durability. Abrasiveness and prevent peeling between the layers constituting the protective film.

Disclosure of invention

The object of the present invention is to provide a biaxially oriented polyester film that can solve the above-mentioned problems without reducing the brightness and can improve the contrast and color purity.

In addition, another object of the present invention is to provide improved brightness without reducing brightness Adhesive film with contrast and color purity, and improve the peel resistance between layers.

In addition, another object of the present invention is to provide a colored hard coat film that can improve contrast and color purity without reducing brightness, and improve abrasion resistance.

The other objects and advantages of the present invention will be more apparent from the following description.

According to the present invention, other objectives and advantages of the present invention are as follows, first:

It is achieved by a biaxially oriented polyester film with the following characteristics:

(1) Contains pigments,

(2) The turbidity value is at most 0.5%,

(3) The wavelength (X) of the maximum absorption peak of light in the wavelength 540-630nm is in the range of 560-610nm,

(4) The half-height width of the maximum absorption peak of light in the wavelength 540-630nm is below 80nm,

(5) The light transmittance (T_x) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T_x/T₅₄₀) Is less than 0.80,

(6) Light transmittance at wavelength 620nm (T₆₂₀) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T₆₂₀/T₅₄₀) Is the range of 0.5-1.5,

(7) Light transmittance of wavelength 450nm (T₄₅₀) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T₄₅₀/T₅₄₀) Is in the range of 0.5-1.5, and is

(8) Base film for colored hard film for pasting on image display surface.

According to the present invention, other objects and advantages of the present invention are that the second series borrows It is achieved by the adhesive film composed of the biaxially oriented polyester film of the present invention and the first adhesive layer provided on one side of the adhesive film.

Furthermore, according to the present invention, the above-mentioned objects and advantages of the present invention are that the third series is achieved by a colored hard coat film having the following characteristics:

(1) It is composed of a transparent substrate film and a hard coat film on one side of it,

(2) Contains pigments,

(3) The wavelength (X) of the maximum absorption peak of light in the wavelength 540-630nm is in the range of 560-610nm,

(4) The half-height width of the maximum absorption peak of light in the wavelength 540-630nm is below 80nm,

(5) The light transmittance (T_x) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T_x/T₅₄₀) Is less than 0.80,

(6) Light transmittance at wavelength 620nm (T₆₂₀) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T₆₂₀/T₅₄0) is the range of 0.5-1.5,

(7) Light transmittance of wavelength 450nm (T₄₅₀) Divided by the light transmittance of wavelength 540nm (T₅₄₀) Value (T₄₅₀/T₅₄₀) Is the range of 0.5-1.5,

(8) Dura film for pasting on the image display surface.

<p>1. . . Transparent substrate film</p><p>2. . . Colored layer</p><p>3. . . Adhesion layer</p><p>4. . . Dura mater</p><p>5. . . Anti-reflection layer</p><p>6. . . Antifouling layer</p><p>twenty one. . . Colored transparent substrate film</p><p>twenty three. . . Colored adhesion layer</p><p>twenty four. . . Colored dura mater</p><p>51. . . Medium refractive index layer</p><p>52. . . High refractive index layer</p><p>53. . . Low refractive index layer</p><heading level="1">Implementation Type of Invention</heading><p>Observing the relationship between the intensity of CRT and other luminous colors and the wavelength of light, it can be seen that there are three peaks of blue, green, and red from the short-wavelength side. The problem is that there is overlap between blue and green and green and red crest areas. Therefore, even if only blue light or only green light is emitted, there will be an intermediate color between blue and green, or when only green light or only red light is emitted, it will also emit an intermediate color between red and green, that is, any hair color looks good Like yellow light, this intermediate color becomes the cause of the weakening of the image contrast. Since the human eye has a high sensitivity to the intermediate colors of green and red, the intermediate colors of green and red will particularly greatly reduce the contrast and color purity of the image. The intermediate colors of blue and green are not very effective in terms of improving color purity and contrast due to the low sensitivity of the human eye. Therefore, the present invention adds pigments to the hard coat film used for pasting on the image display surface or the biaxially oriented polyester film constituting the film to reduce the light transmittance in the intermediate color range of green and red, so that the overlap between green and red Opaque.</p><p>Hereinafter, first, the biaxially oriented polyester film of the present invention will be explained.</p><p>In the biaxially oriented polyester film of the present invention, in order to prevent the light of the overlapping parts of the green and red of the three primary colors from transmitting, the wavelength of the maximum absorption peak of light in the wavelength of 540-630nm is in the range of 560-610nm. If the wavelength of the maximum absorption peak is less than 560 nm, or exceeds 610 nm, most of the green or red light is absorbed by itself, so it is hopeless to improve the color purity and contrast. The wavelength of the maximum absorption peak is preferably 570-600 nm. Hereinafter, the wavelength of the maximum absorption peak of light in the wavelength of 540-630nm is also referred to as X.</p><p>In the biaxially aligned polyester film of the present invention, in order to prevent the light from the overlapping parts of the green and red of the three primary colors from transmitting, the half-height width of the maximum absorption peak of light in the wavelength of 540-630nm is less than 80nm. If the half-height width of the maximum absorption peak exceeds 80nm, most of the red or green luminescence will be absorbed, and there is no hope to improve color purity and contrast. The half-height width of the maximum absorption peak is preferably 60 nm or less, more preferably 50 nm or less, and most preferably 40 nm or less. On the other hand, the lower limit of the FWHM is preferably at least 10 nm for a wide range of display devices.</p><p>In order to improve the color purity and contrast of the biaxially oriented polyester film of the present invention, the light transmittance (T_x) Relative to the light transmittance of wavelength 540nm (T₅₄₀) Must be less than 0.80. Hereinafter, the light transmittance of wavelength (X) is also referred to as T_x,The light transmittance of 540nm wavelength is also called T₅₄₀. T_xRelative to T₅₄₀If it is 0.8 or more, the absorption of the intermediate colors between red and green is insufficient, and the color purity and contrast cannot be improved. Better T_x/T₅₄₀It is 0.60 or less, more preferably 0.40 or less. T again_x/T₅₄₀Although the lower limit is as small as possible, there is no limitation, but it is preferably 0.05 or more, and it is better not to add the pigment to 0.10 or more.</p><p>The biaxially oriented polyester film of the present invention selectively absorbs visible light because it contains pigments, so it is prone to color deviation. It is very important to suppress the inconsistency of hue (chroma) without changing the original color. In order to suppress the inconsistency of hues, it is expected that the wavelengths of red, green, and blue light should be transmitted through the wavelengths of 450nm, 540nm and 620nm. Rate (T₄₅₀, T₅₄₀And T₆₂₀) Is roughly the same. Hereinafter, the transmittance of light with a wavelength of 450nm is also referred to as T₄₅₀, The transmittance of light with a wavelength of 540nm is called T₅₄₀And the light transmittance of wavelength 620nm is called T₆₂₀. Therefore, in order to suppress the inconsistency of hue, the biaxially oriented polyester film of the present invention, T₄₅₀/T₅₄₀And T₆₂₀/T₅₄₀The range is 0.5-1.5. T₄₅₀/T₅₄₀Or T₆₂₀/T₅₄₀When it is less than 0.5 or more than 1.5, the degree of coloration of the light-emitting tube of the self-picture tube becomes larger and the recognizability is reduced. Better T₄₅₀/T₅₄₀Or T₆₂₀/T₅₄₀The upper limit is 1.3 and the lower limit is 0.7. Better T₄₅₀/T₅₄₀Or T₆₂₀/T₅₄₀The upper limit is 1.2, and the lower limit is 0.8.</p><p>The haze value of the biaxially oriented polyester film of the present invention is 5% or less. When the turbidity value is greater than 5%, the hue of the image is cloudy, lacking in vividness, and poor recognition. The pigments added in the present invention can be exemplified by dyes and pigments, and dyes are more suitable for making the haze value 5% or less. In addition, since the absorption mechanism of the dye is different from that of the pigment, it does not generate scattered light, so it is better for the purpose of only selectively removing the intermediate light. When using a pigment as a pigment, it is better to choose a pigment with a small particle size in order to easily make the haze value below 5%. The particle size of the best raw material is in the range of the average particle size of 50 to 500 nm.</p><p>The biaxially oriented polyester film of the present invention contains pigments that can selectively absorb the intermediate colors of red and green. For the pigment contained in the film, taking into account the heating process between the final product, it is better to be less prone to deterioration or deterioration at a temperature below 330°C. The preferred pigments used in the present invention can be exemplified as anthraquinone pigments, quinacridin pigments, pyridone pigments, polymethyne pigments, methylene pyrrole pigments, polyporphyr blue pigments, phthalocyanine pigments Wait. Pigmentation The additional amount is based on the area of the biaxially oriented polyester film, that is, the area perpendicular to the thicker side of the biaxially oriented polyester film as a reference, preferably 0.004-0.420g/m², More preferably 0.004-0.200g/m²The scope. If the addition amount is less than 0.004g/m²Or more than 0.420g/m², It is difficult to meet the above-mentioned transmission characteristics of visible light.</p><p>The pigment addition method of the present invention can be dispersed, dissolved in ethylene glycol, etc. and added during the polymerization stage. It can also be made into pigment polyester resin particles with a concentration higher than the film concentration, or the dye itself can be melted and solidified into particles and then added. These are mixed in the resin and then added. However, from the viewpoints of the productivity of the film, the prevention of the incorporation of foreign matter and the simplification of the steps, the latter method is better. When the dye is melted and solidified, an appropriate binder can also be added. The mixing method, especially the one that melts and solidifies the dye into pellets, is better to use a small feeder because of its different mechanical properties from the polyester pellets. In terms of the properties of the pigment added to the polyester, from the viewpoint of productivity, the viscosity of the polyester resin decreases less during extrusion of the polyester. In addition, in order to suppress the decrease in the viscosity of the molten polyester resin, the shear deformation speed of the extruder is about 70 (1/sec) and the residence time is 20-4000 seconds. If the residence time is less than 20 seconds, the dye is not sufficiently kneaded and stained spots can be seen. On the other hand, if the residence time exceeds 4000 seconds, the viscosity is likely to decrease and breakage is likely to occur.</p><p>The polyester constituting the biaxially oriented polyester film of the present invention is a linear saturated polyester synthesized from an aromatic dibasic acid or its ester-forming derivative and a diol or its ester-forming derivative. Specific examples of polyesters include polyethylene terephthalate, polyethylene isophthalate, polypropylene terephthalate, Polybutylene terephthalate, poly(1,4-cyclohexene dimethylene terephthalate), polyethylene-2,6-naphthalenedicarboxylate, etc. These copolymers or blends are also included. Among these, it is preferable that 70% by weight or more is made of polyethylene terephthalate or polyethylene-2,6-naphthalenedicarboxylate based on the weight of polyester, and especially it is made. For the processability or transparency of the biaxially oriented polyester film, polyethylene terephthalate, which is mainly composed of repeating units of ethylene terephthalate, is preferred.</p><p>The copolymer component of the polyethylene terephthalic acid, the dicarboxylic acid component can be exemplified by aromatic dicarboxylic acids such as isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid, azelaic acid , Aliphatic dicarboxylic acids such as sebacic acid and decane dicarboxylic acid, cycloaliphatic dicarboxylic acids such as cyclohexane dicarboxylic acid, etc., and examples of the diol component include 1,4-butanediol, 1, Aliphatic diols such as 6-hexanediol and diethylene glycol, cycloaliphatic diols such as 1,4-cyclohexanedimethanol, and aromatic diols such as bisphenol A. These copolymerization components may be used alone or in combination of two or more kinds. Among these copolymer components, isophthalic acid is the most preferable in terms of processability or transparency.</p><p>Although the ratio of the copolymerization component is related to the type, the ratio is preferably such that the melting point of the obtained polymer becomes 230°C-258°C. If the melting point is less than 230°C, the heat resistance or mechanical strength is poor. This kind of polyester is based on ethylene terephthalate as the main repeating unit. When isophthalic acid is used as the copolymerization component, the ratio of isophthalic acid is based on the molar number of the acid component, and the proportion of isophthalic acid is 12 mol%. The following is better. Here, the melting point of the polyester is determined by using a DuPont instrument 910DSC, and a method of obtaining the melting peak at a heating rate of 20°C/min. The sample size is 20 mg.</p><p>The polyester constituting the biaxially oriented polyester film of the present invention has an intrinsic viscosity (o-chlorophenol, 35°C) preferably 0.52-1.50, more preferably 0.57-1.00, and the best range of 0.60-0.80. When the intrinsic viscosity is lower than 0.52, it is unsuitable due to poor film-forming properties. On the other hand, when the intrinsic viscosity is higher than 1.50, the molding processability is impaired, the extruder is overloaded, and the intrinsic viscosity is significantly reduced due to the excessive rise of the resin temperature.</p><p>The polyester constituting the biaxially oriented polyester film of the present invention can be manufactured according to conventional methods. For example, the esterification reaction of terephthalic acid, ethylene glycol and, if necessary, a copolymer component (for example, isophthalic acid) is carried out, and then the resulting reaction product is subjected to a condensation polymerization reaction to the desired degree of polymerization to obtain poly The method of ester, or the transesterification reaction of dimethyl terephthalate, ethylene glycol and the copolymerization component (such as dimethyl isophthalate) if necessary, and then the condensation polymerization reaction of the resulting reaction product to A method to obtain polyester based on the target degree of polymerization. Of course, 2,6-naphthalenedicarboxylic acid can be used as an acid component, and 1,4-cyclohexanedimethanol can be used as a diol component as needed. According to the polyester obtained by the above method (melt polymerization), if necessary, a solid-phase polymerization method (solid-phase polymerization) can also be used to obtain a polyester with a higher degree of polymerization. Moreover, the polyester obtained as described above can be produced according to the conventional film forming method, that is, the polyester is melted and extruded with a linear die to form an unstretched film, which can then be formed by stretching and heat treatment. Biaxially oriented polyester film.</p><p>However, dyes generally have the disadvantages of poor thermal stability and weather resistance compared with pigments. When the dyes of the present invention are added to polyester, most of the ultraviolet rays are absorbed by the polyester, so you can use it without worrying about the weather resistance of the dye. . Of course, in order to further inhibit the degradation of dyes caused by ultraviolet rays, the biaxially oriented polyester film of the present invention adopts the addition of ultraviolet absorbers as the preferred mode of the present invention.</p><p>The ultraviolet absorber contained in the biaxially oriented polyester film of the present invention preferably uses, for example, at least one selected from the unreacted form of the following formula (1):</p><p><img file="TW583263B_D0001.tif" />(In the formula, X⁰¹Is the X shown in the above formula⁰¹2 of which are bonded to a divalent aromatic residue in the positional relationship of position 1 and position 2; n is 1, 2, or 3; R⁰¹N-valent hydrocarbon residues, these groups may also contain heteroatoms, and R⁰¹It can be a direct bond when n=2. )</p><p>And the cyclic imide compound represented by the following formula (2):</p><p><img file="TW583263B_D0002.tif" />(In the formula, A is the group represented by the following formula (3) or the group represented by the following formula (4):</p><p><img file="TW583263B_D0003.tif" /></p><p><img file="TW583263B_D0004.tif" /></p><p>R⁰²And R⁰³Are the same or different monovalent hydrocarbon residues; X⁰²It is a tetravalent aromatic residue, and these groups may also contain heteroatoms). This cyclic imide ester is a conventional compound as an ultraviolet absorber, and it is disclosed in Unexamined-Japanese-Patent No. 59-12952, for example.</p><p>In the above general formula (1), X⁰¹Is the X shown in formula (1)⁰¹2 of which are bonded to a divalent aromatic residue in the positional relationship of position 1 and position 2; n is 1, 2, or 3; R⁰¹N-valent hydrocarbon residues, these groups may also contain heteroatoms, and R⁰¹It can be a direct bond when n=2.</p><p>X⁰¹Preferably, examples include 1,2-phenylene, 1,2-naphthalene, 2,3-naphthalene, and the group represented by the following formula (5):</p><p><img file="TW583263B_D0005.tif" />(In the formula, R is -O-, -CO-, -S-, -SO₂-, -CH₂-, -(-CH₂-)₂Or -C(-CH₃-)₂-). Among these, 1,2-phenylene is the best.</p><p>About X⁰¹The exemplified above-mentioned aromatic residues can also be passed through, for example, alkyl groups with 1-10 carbon atoms, such as methyl, ethyl, propyl, hexyl, decyl, etc.; Aryl groups of 6-12, such as phenyl, naphthyl, etc.; cycloalkyls of 5-12 carbons, such as cyclopentyl, cyclohexyl, etc.; aralkyls of 8-20 carbons, such as phenethyl, etc. ; Alkoxy groups with 1-10 carbons, such as methoxy, ethoxy, decoxy, etc.; nitro; halogens such as chlorine, bromine, etc.; acyl groups with 2-10 carbons, such as acetyl, propyl The acyl group, phenacyl group, decacyl group, etc.; and other substituents substituted.</p><p>R⁰¹It is a hydrocarbon residue of n valence (however, n is 1, 2 or 3), or when n is 2, it may be only a direct bond.</p><p>Monovalent hydrocarbon residues (when n=1), the first examples include unsubstituted aliphatic groups with 1-10 carbons, unsubstituted aromatic groups with 6-12 carbons, and unsubstituted aromatic groups with 5-12 carbons. Substituted cycloaliphatic group.</p><p>Examples of unsubstituted aliphatic groups with 1-10 carbons include methyl, ethyl, propyl, hexyl, decyl, etc.; unsubstituted aromatic groups with 6-12 carbons include, for example, phenyl, naphthyl, and biphenyl. Phenyl, etc.; unsubstituted cycloaliphatic groups having 5-12 carbons are, for example, cyclopentyl, cyclohexyl and the like.</p><p>In addition, for the above monovalent hydrocarbon residue, the second group can be exemplified by the following formula (6):</p><p><img file="TW583263B_D0006.tif" />(In the formula, R⁰⁴Is alkylene, phenylene or naphthalene with carbon number 2-10),</p><p>The base shown in the following formula (7):</p><p><img file="TW583263B_D0007.tif" />(In the formula, R⁰⁵Is an alkyl, phenyl or naphthyl group with 1-10 carbon atoms),</p><p>The base shown in the following formula (8):</p><p><img file="TW583263B_D0008.tif" />(In the formula, R⁰⁴And R⁰⁵The definition is the same as above, R⁰⁶Is a hydrogen atom or R⁰⁵Any basis defined in),</p><p>The substituted aliphatic residue or aromatic residue represented by the following formula (9):</p><p><img file="TW583263B_D0009.tif" />(In the formula, R⁰⁴And R⁰⁶The definition is the same as above, R⁰⁷Is a hydrogen atom or R⁰⁵Any of the bases defined in).</p><p>In addition, the above-mentioned monovalent hydrocarbon residue may be exemplified as the above-mentioned unsubstituted aromatic residue as the third one. For example, it may be exemplified as the above-mentioned X⁰¹The substituents of the aromatic residues shown are substituted by the same substituents. Therefore, examples of substitution by substituents include tolyl, methylnaphthyl, nitrophenyl, nitronaphthyl, chlorophenyl, phenylphenyl, acetylphenyl, or acetylnaphthalene. Base etc.</p><p>The monovalent hydrocarbon residue is preferably a group represented by the above formula (6), (7), (8) or (9), that is, a substituted aliphatic residue or an aromatic residue, wherein the substituted The aromatic residues are the best.</p><p>Divalent hydrocarbon residues (when n=2), the first example can be divalent unsubstituted aliphatic residues with 2-10 carbons, unsubstituted aromatic residues with 6-12 carbons, and carbon numbers 5-12 unsubstituted cycloaliphatic residues.</p><p>Examples of divalent unsubstituted aliphatic residues with 2-10 carbons include ethylene, propylene, butylene, decene, etc., and examples of unsubstituted aromatic residues with 6-12 carbons that are divalent For example, phenylene, naphthalene, p-, p-biphenylene, etc., bivalent unsubstituted cycloaliphatic residues with 5-12 carbon atoms can be exemplified by cyclopentane, cyclohexene and the like.</p><p>In addition, for the above-mentioned divalent hydrocarbon residue, the second group may be a group represented by the following formula (10):</p><p><img file="TW583263B_D0010.tif" />(In the formula, R⁰⁸For R⁰⁴Any basis defined in),</p><p>Or substituted aliphatic residues or aromatic residues represented by the following formula (11):</p><p><img file="TW583263B_D0011.tif" />(In the formula, R⁰⁸The definition is the same as above, R⁰⁹For R⁰⁴Any of the bases defined in, and R⁰¹⁰For R⁰⁶Any of the bases defined in).</p><p>In addition, the above-mentioned divalent hydrocarbon residue, the third example of the above-mentioned unsubstituted divalent aromatic residue, for example, is exemplified as the above-mentioned X⁰¹The substituents of the aromatic residues shown are those substituted by the same substituents.</p><p>R when n is 2⁰¹Preferably, the direct bond or the unsubstituted or substituted divalent aromatic residues of the first to third groups mentioned above are preferred, especially the first or second bond that extends from the farthest position apart. Three groups of unsubstituted or substituted divalent aromatic residues are the best, among which p-phenylene, p, p'-biphenylene or 2,6 naphthylene is preferred.</p><p>Examples of trivalent hydrocarbon residues (when n=3) include trivalent aromatic residues with 6-12 carbon atoms.</p><p>The aromatic residue can be exemplified by the group of the following formula (12), etc.:</p><p><img file="TW583263B_D0012.tif" /></p><p>This aromatic residue may be substituted with the same substituent as the substituent exemplified for the above-mentioned monovalent aromatic residue.</p><p>In the above general formula (5), R⁰²And R⁰³Are the same or different monovalent hydrocarbon residues, X⁰²It is a 4-valent aromatic residue.</p><p>R⁰²And R⁰³For example, in the description of the above formula (1), R when n=1⁰¹The same base as exemplified.</p><p>The tetravalent aromatic residue can be exemplified by the group represented by the following formula (13):</p><p><img file="TW583263B_D0013.tif" />(In the formula, R⁰The definition is as in formula (5)).</p><p>The above-mentioned tetravalent aromatic residue can also be combined with the above-mentioned formula (1), R⁰¹The monovalent aromatic residues shown are substituted with the same substituents as exemplified.</p><p>Specific examples of the cyclic imide esters represented by the above formulas (1) and (2) used in the present invention can be exemplified by the following compounds.</p><p>The compound when n=1 in the above formula (1):</p><p>2-methyl-3,1-benzoxa<img file="TW583263B_D0014.tif" />-4-one, 2-butyl-3,1-benzox<img file="TW583263B_D0015.tif" />-4-one, 2-phenyl-3,1-benzox<img file="TW583263B_D0016.tif" />-4-one, 2-(1-or 2-naphthyl)-3,1-benzoxan<img file="TW583263B_D0017.tif" />-4-one, 2-(4-biphenyl)-3,1-benzox<img file="TW583263B_D0018.tif" />-4-one, 2-p-nitrophenyl-3,1-benzox<img file="TW583263B_D0019.tif" />-4-one, 2-m-nitrophenyl-3,1-benzox<img file="TW583263B_D0020.tif" />-4-one, 2- P-phenacylphenyl-3,1-benzox<img file="TW583263B_D0021.tif" />-4-one, 2-p-methoxyphenyl-3,1-benzoxa<img file="TW583263B_D0022.tif" />-4-one, 2-o-methoxyphenyl-3,1-benzoxa<img file="TW583263B_D0023.tif" />-4-one, 2-cyclohexyl-3,1-benzoxan<img file="TW583263B_D0024.tif" />-4-one, 2-p-(or m-)phthaliminophenyl-3,1-benzox<img file="TW583263B_D0025.tif" />-4-one, N-phenyl-4-(3,1-benzoxan<img file="TW583263B_D0026.tif" />-4-keto-2-yl)phthalimide, N-phenacyl-4-(3,1-benzoxan<img file="TW583263B_D0027.tif" />-4-keto-2-yl)aniline, N-phenanyl-N-methyl-4-(3,1-benzoxan<img file="TW583263B_D0028.tif" />-4-keto-2-yl)aniline, 2-(p-(methylcarbyl)phenyl)-3,1-benzoxa<img file="TW583263B_D0029.tif" />-4-one.</p><p>The compound with n=2 in the above formula (1):</p><p>2,2'-Bis(3,1-benzox<img file="TW583263B_D0030.tif" />-4-one), 2,2'-ethylene bis(3,1-benzox<img file="TW583263B_D0031.tif" />-4-one), 2,2'-butylene bis(3,1-benzox<img file="TW583263B_D0032.tif" />-4-one), 2,2'-decene bis(3,1-benzox<img file="TW583263B_D0033.tif" />-4-one), 2,2'-p-phenylene bis(3,1-benzox<img file="TW583263B_D0034.tif" />-4-one), 2,2'-m-phenylene bis(3,1-benzox<img file="TW583263B_D0035.tif" />-4-one), 2,2'-(4,4'-diphenylene) bis(3,1-benzoxan)<img file="TW583263B_D0036.tif" />-4-one), 2,2'-(2,6-or 1,5-naphthylene) bis(3,1-benzoxan)<img file="TW583263B_D0037.tif" />-4-one), 2,2'-(2-methyl-p-phenylene) bis(3,1-benzox<img file="TW583263B_D0038.tif" />-4-one), 2,2'-(2-nitro-p-phenylene) bis(3,1-benzoxan)<img file="TW583263B_D0039.tif" />-4-one), 2,2'-(2-chloro-p-phenylene) bis(3,1-benzoxan)<img file="TW583263B_D0040.tif" />-4-one), 2,2'-(1,4-cyclohexylene) bis(3,1-benzox<img file="TW583263B_D0041.tif" />-4-one), N-p-(3,1-benzox<img file="TW583263B_D0042.tif" />-4-keto-2-yl)phenyl, 4-(3,1-benzoxan)<img file="TW583263B_D0043.tif" />-4-keto-2-yl)phthalimide, N-p-(3,1-benzoxan)<img file="TW583263B_D0044.tif" />-4-keto-2-yl)phenacyl, 4-(3,1-benzoxan)<img file="TW583263B_D0045.tif" />-4-keto-2-yl)aniline.</p><p>The compound with n=3 in the above formula (1):</p><p>1,3,5-tris(3,1-benzoxa<img file="TW583263B_D0046.tif" />-4-keto-2-yl)benzene, 1,3,5-tris(3,1-benzoxan)<img file="TW583263B_D0047.tif" />-4-keto-2-yl)naphthalene, 2,4,6-tris(3,1-benzoxan)<img file="TW583263B_D0048.tif" />-4-keto-2-yl) naphthalene,</p><p>The compound of the above formula (2)</p><p>2,8-Dimethyl-4H,6H-benzo(1,2-d;5,4-d')bis(1,3)oxa<img file="TW583263B_D0049.tif" />-4,6-dione, 2,7-dimethyl-4H,9H-benzo(1,2-d;4,5-d')bis(1,3)oxa<img file="TW583263B_D0050.tif" />-4,9-dione, 2,8-diphenyl-4H,8H-benzo(1,2-d;5,4-d')bis(1,3)oxa<img file="TW583263B_D0051.tif" />-4,6-dione, 2,7-diphenyl-4H,9H-benzo(1,2-d;4,5-d')bis(1,3)oxa<img file="TW583263B_D0052.tif" />-4,6-dione, 6,6'-bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0053.tif" />4-ketone), 6,6'-bis(2-ethyl-4H,3,1-benzox<img file="TW583263B_D0054.tif" />4-ketone), 6,6'-bis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0055.tif" />4-ketone), 6,6'-methylenebis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0056.tif" />4-ketone), 6,6'-methylenebis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0057.tif" />4-ketone), 6,6'-ethylene bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0058.tif" />4-ketone), 6,6'-ethylenebis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0059.tif" />4-ketone), 6,6'-butylene bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0060.tif" />4-ketone), 6,6'-butylene bis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0061.tif" />4-ketone), 6,6'-oxybis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0062.tif" />4-ketone), 6,6'-oxybis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0063.tif" />4-ketone), 6,6'-sulfonyl bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0064.tif" />4-ketone), 6,6'-sulfonyl bis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0065.tif" />4-ketone), 6,6'-carbonyl bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0066.tif" />4-ketone), 6,6'-carbonyl bis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0067.tif" />4-ketone), 7,7'-methylene bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0068.tif" />4-ketone), 7,7'-methylenebis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0069.tif" />4-ketone), 7,7'-bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0070.tif" />4-ketone), 7,7'-ethylene bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0071.tif" />4-ketone), 7,7'-oxybis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0072.tif" />4-ketone), 7,7'-sulfonyl bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0073.tif" />4-ketone), 7,7'-carbonyl bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0074.tif" />4-ketone), 6,7'-bis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0075.tif" />4-ketone), 6,7'-bis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0076.tif" />4-ketone), 6,7'-methylenebis(2-methyl-4H,3,1-benzox<img file="TW583263B_D0077.tif" />4- Ketone), 6,7'-methylenebis(2-phenyl-4H,3,1-benzox<img file="TW583263B_D0078.tif" />4 Ketone).</p><p>Among the compounds exemplified above, the compound of the above formula (1) is preferably the compound of the above formula (1) with n=2, and the compound of the following formula (14) is preferably used:</p><p><img file="TW583263B_D0079.tif" />(In the formula, R⁰¹¹Is a divalent aromatic residue).</p><p>In the compound of formula (14), 2,2'-p-phenylene bis(3,1-benzox<img file="TW583263B_D0080.tif" />-4-one), 2,2'-(4,4'-diphenylene) bis(3,1-benzoxan)<img file="TW583263B_D0081.tif" />-4-one) and 2,2'-(2,6-naphthylene) bis(3,1-benzox<img file="TW583263B_D0082.tif" />-4-one) is preferred.</p><p>The ultraviolet absorption characteristics of these cyclic imide esters can be cited, for example, as described in related representative compounds in JP-A-59-12952.</p><p>Although the aforementioned cyclic imide ester has excellent compatibility with polyester, it also has the ability to react with the terminal hydroxyl group of polyester as described in the above-mentioned Japanese Patent Laid-Open No. 59-12952 and the specification of US Patent No. 4,291,152 . Therefore, to contain the cyclic imide ester in a substantially unreacted state, it is necessary to pay close attention to the mixing of the cyclic imide ester and the polyester. However, if the polyester uses a polyester whose main proportion of the terminal group is a carboxyl group, or a polyester whose terminal hydroxyl group is blocked by a terminal blocking agent that is non-reactive with the cyclic imide ester In this case, there is no need to pay special attention when manufacturing the composition containing the cyclic imide ester in an unreacted state. If the main proportion of polyester whose end groups are hydroxyl groups is used, the melt mixing time is better to meet the following formula 2 and be completed in a short time:</p><p>1ogt-0.008T+4.8</p><p>Tm&lt;T&lt;320 (where t is the melting and mixing time (seconds), T is the melting and mixing temperature (°C) and Tm is the melting temperature (°C) of the polyester).</p><p>In this case, although the cyclic imide ester and the polyester may react in a small proportion, this reaction causes the molecular weight of the polyester to increase. Therefore, this ratio can prevent the deterioration of the polyester due to the light absorber and the molecular weight. reduce. In addition, when the cyclic imide is reacted with polyester, the ultraviolet wavelength absorption area, generally, the ultraviolet wavelength absorption area showing a bias toward the unreacted state is on the lower wavelength side, so the ultraviolet rays on the high wavelength side tend to pass through.</p><p>When the above-mentioned cyclic imine ester is added in an appropriate amount, there is almost no sublimation, so there is little pollution to the periphery of the film-making die. It absorbs light from ultraviolet to around 380nm without coloring the film, so it prevents visible light absorbers and The characteristics of film deterioration are superior.</p><p>The addition amount of the above-mentioned ultraviolet absorber is preferably 0.1-5% by weight for polyester, and more preferably 0.2-3% by weight. If the amount is less than 0.1%, the effect of preventing deterioration will be small. On the other hand, if it exceeds 5% by weight, the film-forming properties of the polyester will decrease. The addition of the above-mentioned ultraviolet absorber is based on the poly During ester polymerization or melt extrusion, it is preferable to add an ultraviolet absorber to form a matrix particle.</p><p>In the present invention, an antioxidant, heat stabilizer, viscosity modifier, plasticizer, and hue improvement can be added during the manufacturing process of the polyester constituting the biaxially oriented polyester film or after extrusion from the die. Other additives such as agents, lubricants, nucleating agents, anti-charge agents, catalysts, etc.</p><p>The lubricant added to the polyester used in the present invention may, for example, contain a suitable roughening substance (filler). The filler can use conventionally known polyester lubricity imparting agents, such as calcium carbonate, calcium oxide, alumina, kaolin, silica, zinc oxide, carbon black, silicon carbide, tin hydride, and cross-linked acrylate. Particles composed of resin, cross-linked polystyrene resin, melamine resin, cross-linked silicone resin, etc. Among them, in terms of maintaining transparency while imparting lubricity, porous silica with an average particle size of 1-3 μm is preferred. The amount of porous silica added is preferably 0.01-0.005% by weight from the viewpoint of transparency and lubricity.</p><p>In the present invention, the thickness of the biaxially oriented polyester film, in order to easily suppress the scattering of the glass when the CRT collapses, is preferably 50μm or more. The upper limit of the thickness of the biaxially oriented polyester film is easy to maintain turbidity. The degree is below 5% and the productivity of the film is preferably below 250μm.</p><p>Next, the adhesive film of the present invention with an adhesive layer provided on at least one side of the above-mentioned biaxially oriented polyester film is described in detail.</p><p>The adhesive film of the present invention can be said to be an intermediate product for manufacturing colored hard film for pasting on an image display surface. The colored hard film for pasting on the image display surface is described later.</p><p>The adhesive layer constituting the adhesive film of the present invention is preferably composed of a composition composed of a water-based polyester resin or acrylic resin as a main component, or a mixture of the two. The glass transition point (Tg) of the water-based polyester resin forming the adhesive layer is preferably 45-100°C. The preferred upper limit of Tg is 80°C, and the preferred lower limit of Tg is 50°C. When the glass transition point (Tg) of the water-based polyester is less than 45°C, the heat resistance of the resulting adhesive film will become low, and the blocking resistance will also tend to decrease. On the other hand, if the glass transition point (Tg) of water-based polyester exceeds 100°C, it lacks the effect of improving adhesion. The so-called water-based polyester here refers to a polyester that is soluble or dispersible in water, and also includes a polyester that is water soluble or dispersible when used in combination with a small amount of organic solvent.</p><p>The water-based polyester resin is composed of a polybasic acid or its ester-forming derivative and a polyhydric alcohol or its ester-forming derivative. Specific examples of polybasic acid components include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, Adipic acid, sebacic acid, trimellitic acid, pyromellitic acid, dimer acid, sodium 5-thioisophthalate, etc. Use two or more of these acid components to synthesize copolyester resin. In addition, a small amount of unsaturated polybasic acid components such as maleic acid, itaconic acid, etc., and hydroxycarboxylic acids such as p-hydroxybenzoic acid may also be used. In addition, specific polyol components can be exemplified such as ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, di Toluene glycol, dimethylolpropane, poly(oxyethylene) glycol, poly(oxybutylene) glycol, etc.</p><p>The glass transition point (Tg) of the acrylic resin constituting the adhesive layer is better It is in the range of -50-50°C. When the glass transition point of the acrylic resin does not reach -50°C, the heat resistance of the resulting adhesive film becomes low, and the blocking resistance is also easily reduced. On the other hand, if the glass transition point of the acrylic resin exceeds 50°C, it lacks the effect of improving adhesion. The acrylic resin here refers to polyesters that are soluble or dispersible in water, and also includes polyesters that are soluble or dispersible in water when used in combination with a small amount of organic solvents.</p><p>The acrylic resin is obtained by copolymerizing the following acrylic monomers. Specifically, preferred acrylic monomers can be exemplified by alkyl acrylate, alkyl methacrylate (alkyl is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, 2 -Ethylhexyl, cyclohexyl, etc.); 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, etc. containing hydroxyl groups Body; glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether and other epoxy-containing monomers; acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, butyl Acrylic acid, styrene sulfonic acid and its salts (sodium salt, potassium salt, ammonium salt, tertiary amine salt, etc.) and other monomers containing carboxyl group or its salt; acrylamide, methacrylamide, N-alkyl Acrylic amide, N-alkyl methacrylamide, N,N-dialkyl acrylamide, N,N-dialkyl methacrylamide (alkyl is methyl, ethyl, n-propyl , Isopropyl, n-butyl, isobutyl, tertiary butyl, 2-ethylhexyl, cyclohexyl, etc.), N-alkoxyacrylamide, N-alkoxymethacrylamide, N , N-dialkoxy acrylamide, N,N-dialkoxy methacrylamide (alkoxy is methoxy, ethoxy, butoxy, isobutoxy, etc.), acrylamide Morpholine, N-methylol methacrylamide, N-methylol methacrylamide Amine, N-phenylacrylamide, N-phenylmethacrylamide and other monomers containing amide groups; anhydride monomers such as maleic anhydride and itaconic anhydride; vinyl isocyanate, allyl isocyanate, styrene , Α-methylstyrene, vinyl methyl ether, vinyl ethyl ether, ethylene trialkoxysilane, alkyl maleic acid monoester, alkyl fumaric acid monoester, alkyl itaconic acid monoester, propylene Nitrile, methacrylonitrile, ethylene dichloride, ethylene, propylene, vinyl acetate, butadiene, etc.</p><p>The adhesive layer of the present invention can be the aqueous solution, water dispersion or emulsion of the above composition by roll coating, gravure coating, roll brushing, spray coating, air knife, impregnation, curtain The coating method or the like is formed by coating on the support. The aqueous solution, water dispersion or emulsion of the composition for forming the adhesive layer may be optionally added with resins other than those listed above, such as polymers containing oxazoline groups, melamine, epoxides, and nitrogen heterocycles. Crosslinking agents such as propane, antistatic agents, pigments, surfactants, ultraviolet absorbers, lubricants (fillers, waxes), etc. The application of the aqueous solution, water dispersion or emulsion of the above composition to the support can be carried out during or after the production of the biaxially oriented polyester film as the support, and is preferred to the biaxially oriented polyester film During the film making process. Particularly, it is better to coat the biaxially oriented polyester film until the orientation crystallization of the biaxially oriented polyester film is finished. Here, the stage until the completion of the alignment crystallization includes the unstretched film, and the unstretched film is aligned in the longitudinal direction of the film (length direction) or the direction perpendicular to the longitudinal direction (width direction) of the film to either direction. Uniaxially oriented film, in addition, it also includes the thing that stretches and aligns at low magnification in the longitudinal direction of the film and the direction perpendicular to the longitudinal direction of the film (the final alignment is extended to the longitudinal direction and the direction perpendicular to the longitudinal direction of the film and then stretched again. Double before crystallization is complete Axis-aligned polyester film) and so on. Among them, it is better to apply the coating liquid of the above composition to a uniaxially stretched film aligned in a single direction, and directly stretch it in a direction perpendicular to the alignment direction and then apply heat fixation. In this way, the adhesive layer applied during the stretching step is firmly bonded to the biaxially aligned polyester film of the base film. The adhesive layer can be formed only on one side of the film or on both sides as needed. The thickness of the adhesive layer can be adjusted by the amount of coating liquid, preferably 70-100nm, more preferably 75-95nm The scope. If the thickness of the coating film is less than 70nm, the adhesion will be insufficient. On the contrary, if it is too thick and exceeds 100nm, it will cause agglomeration and the turbidity value may increase.</p><p>In addition, when applying the coating liquid to the film, it is better to apply corona surface treatment, flame treatment, plasma treatment and other physical treatments to the coating surface in advance in order to improve the coating properties, or to use it in combination with the coating composition. Chemically inactive surfactant. The surfactant is one that can promote the wettability of the water-based coating liquid on the polyester film, such as polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, Anionic and nonionic surfactants such as glycerin fatty acid esters, fatty acid metal soaps, alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates.</p><p>The coating liquid used to form the adhesive layer has a mixture of ionic low-molecular compounds due to the presence of impurities in the raw materials. The so-called ionic low-molecular compound system has -SO₃^-M⁺, -COO^-M⁺, -PO₄^-M⁺, -NO^-M⁺(M in the formula represents an alkali metal or ammonium group) and other ionic functional groups with a molecular weight of 1000 or less. If the amount of the ionic low-molecular compound in the adhesive layer exceeds 1000 ppm, the above-mentioned coating liquid is applied to the biaxially aligned polyester film. When filming, the wettability of the coating liquid to the biaxially oriented polyester film is reduced, and it is difficult to obtain a certain thickness of the coating film, and the adhesion is also easy to decrease. In addition, the detection of ionic low-molecular-weight compounds is to measure the surface of the coating film by XPS (X-ray electron spectroscopy) after the coating film is formed on the film surface.</p><p>The adhesive film of the present invention uses the adhesive layer as the inner surface (any surface is acceptable when coating on both sides) when the visible light from the side of the biaxially oriented polyester film is incident on it at an angle of 45°C. The reflectance at the interface between the adhesive layer and the biaxially oriented polyester film is preferably 0.4% or less of the incident light. Hereinafter, this reflectance is also referred to as internal reflectance. If the internal reflectance exceeds 0.4%, the impact on the surface reflection cannot be ignored. Specifically, when it is used as a colored hard coat film for optics, the reflection of external light is the interference of surface reflection and internal reflection, which becomes rainbow-like and is eye-catching, resulting in reduced visibility. If the internal reflectance is 0.4% or less, the refractive index (nz) in the thickness direction of the adhesive layer is preferably 1.50-1.60. If nz is out of the above range, the reflectance of the inner surface in the visible light area is likely to exceed 0.4%. Next, the colored hard coat film of the present invention will be described in detail.</p><p>The colored hard coat film of the present invention can appropriately reduce the light transmittance in the intermediate color range of green and red, so that the light of the overlapped part of the green and red of the three primary colors will not pass through, at least in the hard coat layer and the transparent base film. The dura film contains a pigmented dura film.</p><p>The colored hard coat film of the present invention prevents the light from the overlapping parts of the green and red of the three primary colors from passing through, and the wavelength of the maximum absorption peak of light in the wavelength of 540-630nm is in the range of 560-610nm. If the wavelength of the maximum absorption peak is less than 560nm, or more than 610 At nm, most of the luminescence of green or red itself is absorbed, so it is hopeless to improve the color purity and contrast. The wavelength of the maximum absorption peak is preferably 570-600 nm.</p><p>In the colored hard film of the present invention, in order to prevent the light of the green and red overlapping parts of the three primary colors from transmitting, the half-height width of the maximum absorption peak of light in the wavelength of 540-630nm is less than 80nm. If the half-height width of the maximum absorption peak exceeds 80nm, most of the red or green luminescence will be absorbed, and there is no hope to improve color purity and contrast. The half-height width of the maximum absorption peak is preferably 60 nm or less, more preferably 50 nm or less, and most preferably 40 nm or less. On the other hand, the lower limit of the half-height width is preferably at least 10 nm for a wide range of display devices.</p><p>In order to improve the color purity and contrast of the colored hard film film of the present invention, the light transmittance (T_x) Relative to the light transmittance of wavelength 540nm (T₅₄₀) Must be less than 0.80. Hereinafter, the light transmittance of wavelength (X) is called T_x, The transmittance of light with a wavelength of 540nm is called T₅₄₀. T_xRelative to T₅₄₀If it is 0.8 or more, the absorption of the intermediate colors between red and green is insufficient, and the color purity and contrast cannot be improved. Better T_x/T₅₄₀Less than 0.6, better T_x/T₅₄₀It is 0.4 or less. Again, T_x/T₅₄₀Although the lower limit is as small as possible, there is no limitation, but 0.05 or more is preferable, and 0.10 or more is more preferable. However, it is preferable that the pigment is not excessively added.</p><p>The colored hard film of the present invention contains pigments and selectively absorbs visible light, so it is easy to have color deviation, so it does not change the original color It is very important to try to suppress the inconsistency of hue (chroma). In order to suppress the inconsistency of hues, it is expected that the wavelengths of red, green, and blue light, and the light transmittance (T₄₅₀, T₅₄₀And T₆₂₀) Is roughly the same. Therefore, in order to suppress the inconsistency of hue, the colored hard film of the present invention, T₄₅₀/T₅₄₀And T₆₂₀/T₅₄₀It is in the range of 0.5-1.5. T₄₅₀/T₅₄₀Or T₆₂₀/T₅₄₀When it is less than 0.5 or more than 1.5, the degree of coloration of the light-emitting tube of the self-picture tube becomes larger and the recognizability is reduced. Better T₄₅₀/T₅₄₀Or T₆₂₀/T₅₄₀The upper limit is 1.3 and the lower limit is 0.7. Better T₄₅₀/T₅₄₀And T₆₂₀/T₅₄₀The upper limit is 1.2, and the lower limit is 0.8.</p><p>However, the colored hard film of the present invention is on any layer constituting the hard film film and contains pigments that can satisfy the above-mentioned optical characteristics. In addition, the pigment used in the present invention, taking into account the heating process between the final product, is preferably at least at a temperature of 150°C or less that is not prone to deterioration or deterioration. In particular, the anthraquinone dyes, quinacridone dyes, pyridone dyes, polymethyne dyes, methylenepyrrole dyes, polyporphyrin dyes, and the exemplified in the biaxially oriented polyester film of the present invention Cyanide pigments are preferred. The amount of pigment added is based on the area of the colored hard ester film, that is, the area of the side perpendicular to the thickness direction of the colored hard ester film, preferably 0.004-0.420g/m², More preferably 0.004-0.200g/m²The scope.</p><p>The haze value of the colored hard film of the present invention is preferably 10% or less, more preferably 5% or less. If the turbidity value is greater than 10%, the hue of the image will be cloudy, lacking vividness and poor recognition. The pigments used in the present invention are dyes and pigments. Any material is acceptable, but from the viewpoint of turbidity value, dyes are suitable. When a pigment is used as a pigment, it is preferable to have a small particle size that can suppress the turbidity value. The best pigment particle size is the average particle size in the range of 50-500nm.</p><p>The layer structure of the colored hard film of the present invention is described in detail below using Figures 4-10. In addition, the symbol 1 in the figure indicates a transparent base film, 2 indicates a colored layer, 3 indicates an adhesion layer, 4 indicates a hard coat layer, 5 indicates an anti-reflection layer, 6 indicates an antifouling layer, 21 indicates a colored transparent substrate film, 23 is a colored adhesion layer, 24 is a colored hard coat layer, 51 is a medium refractive index layer, 52 is a high refractive index layer, and 53 is a low refractive index layer. In addition, the adhesive layer described by the aforementioned adhesive film is to improve the adhesiveness of the transparent base film and the hard coat layer or the adhesive layer, etc. The adhesive layer mentioned here refers to the one used to stick the colored hard coat film on the image display surface . Hereinafter, the adhesive layer is also referred to as the first adhesive layer, and the adhesive layer is also referred to as the second adhesive layer.</p><p>Figure 4 shows the layer structure 1 of the colored hard coat film of the present invention. The colored hard coat film in Figure 4 is an example of using a colored transparent base film 21 containing pigments. The hard coat layer 4 is formed on one side of the colored transparent base film 21, and on the other side, it is adhered to the display device. An adhesion layer 3 is formed on the side of the display surface.</p><p>Figure 5 shows the layer structure 2 of the colored hard coat film of the present invention. The colored hard coat film in Figure 5 takes the adhesive layer containing pigment as an example. The hard coat layer 4 is formed on one side of the transparent substrate film 1, and the hard coat layer 4 is formed on the other side, that is, the side of the display side of the display device. A colored adhesion layer 23 is formed thereon.</p><p>Figure 6 shows the layer structure 3 of the colored hard coat film of the present invention. The colored dura film in Figure 6 is based on the case where the colored dura layer contains pigments. It is transparent The hard film layer 24 is formed on one surface of the base film 1, and the adhesive layer 3 is formed on the other surface, that is, on the display surface side of the display device.</p><p>Figure 7 shows the layer structure 4 of the colored hard coat film of the present invention. As shown in FIG. 7, a hard coat layer 4 is formed on one side of the transparent base film 1, a coloring layer 2 containing pigment is formed on the other side, and an adhesion layer 3 is further formed on the coloring layer 2. In addition, the surface of the adhesive layer 3 forming the colored hard film is adhered to the surface on the display surface side of the display device.</p><p>Figure 8 shows the layer structure 5 of the colored hard coat film of the present invention. The colored hard coat film in Figure 8 is formed on one side of the transparent base film 1 with a colored layer 2 containing pigments, and then a hard coat layer 4 is formed on the colored layer 2, on the other side of the transparent base film 1 , That is, an adhesive layer 3 is formed on the side of the display surface of the display device.</p><p>Figure 9 shows the layer structure 6 of the colored hard coat film of the present invention. The colored hard coat film in Figure 9 is an example of imparting anti-reflection and antifouling properties. The hard coat layer 4 of the colored hard coat film in the layer structure 4 in Figure 7 is provided with a medium refractive index layer 51, high The anti-reflection layer 5 is composed of a refractive index layer 52 and a low-refractive index layer 53 in this order, and an anti-fouling layer 6 is provided on the anti-reflection layer 5. In addition, the anti-reflection layer 5 or the antifouling layer 6 is not only applicable to the colored hard coat film of the layer structure 1, but can also be used in any one of the above-mentioned layer structures 2 to 5, and these are preferably provided in The transparent base film of the hard coat layer is preferably on different sides.</p><p>Figure 10 shows the layer structure 7 of the colored hard coat film of the present invention. The colored hard coat film in Figure 10 is an example of imparting anti-reflection and antifouling properties. It is provided on the hard coat layer 4 of the colored hard coat film in the layer structure 1 of Figure 4 The anti-reflection layer 5 is composed of a middle refractive index layer 51, a high-refractive index layer 52, and a low-refractive index layer 53 in this order, and an anti-fouling layer 6 is provided on the anti-reflection layer 5.</p><p>In addition, the colored hard coat film of the present invention is not limited to those with the layer structure shown in Figs. 4 to 10, and may also be a combination of these. For example, the transparent base film and the hard coat layer, the transparent base film and the adhesion layer, or the hard coat and the adhesion layer both contain pigments, or the three layers of the transparent base film, the hard coat layer and the transparent base film Those who contain pigments.</p><p>The transparent base film forming the colored hard coat film of the present invention is not particularly limited as long as it is colorless and transparent and has sufficient mechanical strength to be actually used as a support for the colored hard coat film. The term "colorless" here refers to those that can meet the aforementioned optical characteristics of visible light when made into a colored hard film, and it also includes those that can meet the optical characteristics of a transparent substrate film with a pigment added. In addition, the term "transparent here means that the haze value is at most 10% or less, preferably 5% or less.</p><p>The specific transparent substrate film used in the present invention can be exemplified such as polyester film, triacetyl cellulose (TAC) film, polyaromatic acid film, polyimide film, polyether film, polycarbonate film, polycure Film, polyether turpentine film, polyamide film, polypropylene film, polymethylpentene film, polyvinyl chloride film, polyvinyl acetal film, polymethyl methacrylate film, polyurethane film, etc. Among them, a polyester film is preferred from the viewpoint of transparency and processability, and a biaxially oriented polyester film is particularly preferred due to its high mechanical strength. The thickness of these transparent substrate films, in order to easily suppress the scattering of the glass in case the CRT collapses, preferably 50μm or more, on the other hand The upper limit of the thickness of the surface is preferably 250μm or less in terms of easy maintenance of haze below 10% or high film productivity. In addition, the biaxially oriented polyester film constituting the colored hard film film of the present invention may not be added with a pigment, and the foregoing description of the biaxially oriented polyester film of the present invention is also applicable.</p><p>However, for the biaxially oriented polyester film constituting the colored hard coat film of the present invention, in order to improve the adhesion to the hard coat layer, etc., it is better to provide an adhesive layer on at least one surface. The adhesive layer provided on at least one side of the biaxially oriented polyester film constituting the colored hard film film of the present invention is also applicable to the conditions described above for the biaxially oriented polyester film of the present invention. The adhesive layer is particularly preferably an adhesive layer composed of a composition composed mainly of water-based polyester and fatty acid amide and/or fatty acid bisamide.</p><p>In the present invention, the amide of the fatty acid or the bisamide of the fatty acid constituting the adhesive layer are respectively R⁰⁰¹CONH₂Or R⁰⁰¹CONHR⁰⁰³NHOCR⁰⁰²Shown, and R⁰⁰¹CO- and R⁰⁰²CO- fatty acid residues,</p><p>-NHR⁰⁰NH- is a diamine residue. The fatty acid of the present invention is preferably a saturated or unsaturated fatty acid with carbon number 6-22, and the diamine is preferably a diamine with carbon number 1-15, especially alkanediamine, and the bisamide has a carbon number of 13-15. N,N'-alkylene bisamide with a molecular weight of 200 to 800 is preferred. Specific examples can be exemplified such as N,N'-methylene bisstearylamine, N,N'-ethylene bispalmitamide, N,N'-methylene bislauric amide, linoleic acid amide, octylamine Amide, stearyl amine, etc.</p><p>These fatty acid amides and/or fatty acid bisamides form a coating film The composition is preferably 3-10% by weight. If the content of fatty acid amide and/or fatty acid bisamide is less than 3% by weight, it is difficult to obtain sufficient adhesive force, and lubricity and blocking resistance tend to be low. On the other hand, if the content exceeds 10% by weight, the film The adhesion to the coating film is easy to decrease, and the low adhesion of the coating film to the glass adhesive also causes the embrittlement of the coating film, and the turbidity tends to increase.</p><p>In the present invention, the friction coefficient of the adhesive layer is preferably 0.8 or less, and more preferably 0.6% or less. If the friction coefficient of the adhesive layer exceeds 0.8, the winding and processing workability will be poor, and smooth film formation and processing will not be possible. A method of forming an adhesive layer with such a friction coefficient can be exemplified by making the coating film of the adhesive layer contain a roughened substance with an average particle size of 0.15 μm or less, especially 0.01-0.1 μm. Specific examples of the roughening material can include calcium carbonate, magnesium carbonate, calcium oxide, zinc oxide, magnesium oxide, silicon oxide, sodium silicate, aluminum hydroxide, iron oxide, zirconium oxide, barium sulfate, titanium oxide, Tin oxide, antimony trioxide, carbon black, molybdenum disulfide and other inorganic particles, acrylic cross-linked polymers, styrene-silicon cross-linked polymers, cross-linked silicone resins, fluororesins, benzoguanamine resins, phenols Organic particles such as resin, nylon resin, polyethylene wax, etc. Among these, in order to avoid the precipitation of water-insoluble solid substances in the water dispersion, it is better to select ultrafine particles with a specific gravity of not more than 3.</p><p>These roughening substances not only make the surface of the coating film rough, the fine powder itself also has the function of reinforcing the coating film, and also has the function of imparting blocking resistance to the coating film and imparting lubricity to the laminate. The addition amount of the roughening substance is preferably 5-30% by weight in the composition forming the coating film. Especially make When larger particles with an average particle diameter of 0.1 µm or more are used, the range is 5-10% by weight, and when particles with an average particle diameter of 0.01-0.1 µm are used, it is preferable to select from the range of 8-30% by weight. If the content of these roughening substances in the coating film is too much, the turbidity value of the resulting laminate will exceed 3%, and the transparency is likely to deteriorate, so special care must be taken. In addition, the surface roughness (Ra) of the center line of the adhesion layer to which the roughening substance is added is preferably 2-10 nm. When the Ra is less than 2nm, it is difficult to achieve the above-mentioned friction coefficient, and the winding shape is poor due to insufficient lubricity when winding the laminate, which hinders subsequent operations. On the other hand, when Ra exceeds 10 nm, the transparency deteriorates and the haze tends to exceed 5%.</p><p>The adhesive layer of the present invention is preferably an aqueous solution, water dispersion or emulsion of a composition composed of the aforementioned water-based polyester and fatty acid amide and/or fatty acid bisamide by roller coating method, gravure coating method , Roller brush method, spray coating method, air knife method, impregnation method, curtain coating method, etc. In addition, to form a coating film, other resins other than the above-mentioned water-based polyester, roughening substances, anti-static agents, surfactants, ultraviolet absorbers, etc. may be added as necessary. The coating of the biaxially oriented polyester film by the coating liquid can be carried out at any stage, and it is better to proceed in the film making process of the biaxially oriented polyester film, especially for the orientation crystallization of the biaxially oriented polyester film Coating is better at the end stage. Here, the stage until the completion of the orientation crystallization includes unstretched films, uniaxially oriented films in which the unstretched films are aligned in either one of the transverse direction or the longitudinal direction of the film, and the longitudinal and transverse directions of the film. Oriented objects are stretched in two directions at low magnification (the biaxially oriented polyester film before the crystallization of the orientation that is finally extended to the longitudinal or lateral direction is completed), etc. And so on Among them, it is better to apply the coating liquid of the above composition to a uniaxially oriented uniaxially stretched film, and apply it directly to the lateral stretch and heat fixation. The biaxially oriented polymer of the adhesive layer and the base film thus obtained The ester film exhibits strong adhesion. The coating film can be formed on only one side of the film or on both sides as required. The coating amount of the coating liquid is preferably such that the thickness of the coating film is 70-100nm, more preferably the amount in the range of 75-95nm . If the thickness of the coating film is less than 70nm, the adhesion will be insufficient. On the contrary, if it is too thick and exceeds 100nm, it will cause agglomeration and the turbidity value may increase.</p><p>Also, when applying the coating liquid to the film, it is better to apply corona surface treatment, flame treatment, plasma treatment and other physical treatments to the coating surface in advance in order to improve the coating properties, or use it together with the coating composition Chemically inactive surfactant. The surfactant is one that can promote the wettability of the water-based coating liquid on the polyester film, such as polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, Anionic and nonionic surfactants such as glycerin fatty acid esters, fatty acid metal soaps, alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates.</p><p>In the present invention, the biaxially oriented polyester film with an adhesive layer uses the adhesive layer as the inner surface (any surface is acceptable when coating on both sides), and the light from the visible light field on the side of the biaxially oriented polyester film is used for it. When incident at an angle of 45°C, the reflectance at the interface between the adhesive layer and the biaxially oriented polyester film (hereinafter also referred to as internal reflectance) is preferably 0.4% or less. If the internal reflectance exceeds 0.4%, the effect on the surface reflection cannot be ignored. When used as an anti-glare film for the display of optical laminates, the reflection of external light is the interference of surface reflection and internal reflection and becomes rainbow-like. Obstructive, easily damaged Identifiability. In order to make the inner surface reflectivity below 0.4%, the refractive index (nz) in the thickness direction of the coating film is preferably 1.50-1.60. If nz exceeds the above range, the internal surface reflection in the visible light area is likely to exceed 0.4%. In addition, if the refractive index exceeds the above-mentioned range, the influence of the inner surface reflection becomes obvious, and it may be difficult to prevent reflection when the following reflection prevention layer is provided. The thus obtained transparent substrate film with an adhesive layer not only has superior surface lubricity and adhesion, but also has superior transparency.</p><p>In the present invention, when the above-mentioned pigment is contained in a transparent substrate film such as a biaxially oriented polyester film, the pigment can be dispersed or dissolved in ethylene glycol and added at the polymerization stage, or it can be added at a higher concentration than the film concentration. The polyester resin particles of the pigment or the dye itself can be melted and solidified into particles, and these can be mixed in the polyester and added. However, from the viewpoints of the productivity of the film, the prevention of foreign matters and the simplification of the steps, the latter method is better. It is also possible to add an appropriate binder when melting and solidifying the dyes and pigments. The mixing method, especially in the particles formed by melting and solidifying the dye, is better to use a small feeder because of the different mechanical properties from the polyester particles. For the properties of the pigment added to the polyester, from the viewpoint of productivity, the viscosity of the polyester resin during extrusion of the polyester is less reduced. In addition, in order to improve the light resistance of the pigment and make the pigment uniformly dispersed, it is more preferable that the colored hard film film of the present invention contains the pigment in the transparent base film.</p><p>The colored hard coat film of the present invention can be mixed with pigments in one or more layers of the transparent substrate film, hard coat layer, and adhesive layer, and the colored layer can also be reset.</p><p>The resin forming the colored layer can use ionizing radiation curable resin, Thermosetting resin, thermoplastic resin. Moreover, it is preferable to adjust the pigment so that the transmittance of the entire colored hard coat film is 40% or more, and it is added to the resin to produce a resin composition for the colored layer. The coating method of the resin composition for the colored layer is a roll coating method, a gravure coating method, a bar coating method, an extrusion coating method, etc., which can be appropriately selected depending on the characteristics of the coating and the amount of coating. Of course, when coating the transparent substrate film, the conventional coating method can also be used, and the coating period can also be carried out at any stage. Specifically, it can be carried out during the film forming process of the transparent base film, or after the film is formed. In addition, at the time of coating, an appropriate solvent may be used to dissolve the above-mentioned composition, and an aqueous solution, water dispersion, or emulsion of the above-mentioned composition may also be used. In addition, when the film forming process of a transparent substrate film is performed, it is preferable to apply an aqueous solution, water dispersion, or emulsion of the above-mentioned composition. In addition, the aqueous solution of the composition described above can also be applied during the film forming process of the transparent substrate using the colored layer as the adhesive layer.</p><p>The hard coat layer constituting the colored hard coat film of the present invention is composed of ionizing radiation curable resin, thermosetting resin, thermoplastic resin, and the like. For the transparent base film, an ionizing radiation-curable resin that is easy to operate in film formation and can be easily increased to a desired pencil hardness value is preferable.</p><p>The ionizing radiation curable resin used to form the hard coat layer is preferably one with acrylic functional groups, especially polyester acrylate or urethane acrylate. The aforementioned polyester acrylate is composed of acrylate and/or methacrylate of polyester polyol oligomer. Hereinafter, both acrylate and methacrylate are also referred to as (meth)acrylate. In addition, the above-mentioned urethane acrylate is composed of an acrylated product of an oligomer formed by a polyol compound and a diisocyanate compound. Also, the monomers that make up acrylates are methyl (Meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, methoxyethyl (meth) acrylate, butyl Oxyethyl (meth)acrylate, phenyl (meth)acrylate, etc.</p><p>However, when it is desired to further increase the hardness of the hard coat layer, a multifunctional monomer can be used in combination. Specific multifunctional monomers can be exemplified as trimethylolpropane (meth)acrylate, hexanediol (meth)acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth) Acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, etc.</p><p>The polyurea oligomer used to form the dura layer can be exemplified by adipic acid and glycol (ethylene glycol, polyethylene glycol, propylene glycol, butylene glycol, polybutylene glycol, etc.) or triol (glycerin, propylene glycol, etc.) Trimethylolpropane, etc.) Polyadipate triol, polysebacate polyol, etc., which are the condensation products of sebacic acid and diol or triol. In addition, part or all of the aforementioned aliphatic dicarboxylic acids can also be replaced by other organic acids. In this case, other organic acids, such as isophthalic acid, terephthalic acid, or phthalic anhydride, can exhibit a high degree of hardness in the hard coat layer, and it is preferable.</p><p>The polyurethane oligomer used to form the hard coat layer can be obtained from the condensation product of polyisocyanate and polyol. Specific polyisocyanates can be exemplified as methylene. Bis (p-phenylene diisocyanate), hexamethylene diisocyanate. The adduct of hexanetriol, hexamethylene diisocyanate, tolylene diisocyanate, toluene diisocyanate trimethylolpropane adduct, 1,5-naphthalene diisocyanate, thiopropyl diisocyanate, ethyl Benzene-2,4-bis Isocyanate, 2,4-tolylylene diisocyanate dimer, hydrogenated xylene diisocyanate, tris(4-phenylisocyanate) phosphorothioate, etc., and specific polyols can be exemplified by polyoxybutylene glycol, etc. Polyether polyols, polyadipate polyols, polycarbonate polyols and other polyester polyols, acrylates and hydroxyethyl methacrylate oligomers, etc.</p><p>In addition, when ultraviolet-curable resins are used for the ionizing radiation-curable resin that forms the hard coat layer, among these resins, acetophenones, benzophenones, Michler benzoate, and α-amine are used. Oxime esters, thioxanones, etc. are used as photopolymerization initiators, and n-butylamine, triethylamine, tri-n-butylphosphine, etc. are preferably used in combination as photosensitizers.</p><p>In addition, urethane acrylate is rich in elasticity and flexibility, and is excellent in workability (bendability), but on the contrary, the surface hardness is not enough to obtain a pencil hardness of 2H or more. In contrast, polyester acrylate can form a hard film layer with extremely high hardness by selecting the constituent components of polyester. Therefore, in order to have both high hardness and flexibility at the same time, it is better to mix 60-90 parts by weight of urethane acrylate with a hard coat layer of 40-10 parts by weight of polyester acrylate.</p><p>Therefore, in order to adjust the gloss and provide (non-releasable) surface lubrication for the coating liquid used to form the hard coat layer, add 0.3 to 3 parts by weight to 100 parts by weight of the resin component with a secondary particle size of 20 μm or less. Active fine particles are preferred. If it is 0.3 parts by weight or less, the effect of improving lubricity is lacking, and if it exceeds 3 parts by weight, the pencil hardness of the obtained hard coat layer is reduced. In addition to inorganic particles such as silica, magnesium carbonate, aluminum hydroxide, and barium sulfate, the inactive fine particles added to the coating solution include polycarbonate, acrylic resin, polyimide, polyamide, and polyethylene. Naphthalate, trimer Fine particles of organic polymers such as cyanamide resin.</p><p>The coating method for forming the hard film layer is roll coating, gravure coating, bar coating, extrusion coating, etc., which can be appropriately selected depending on the characteristics of the coating and the coating amount from the conventional methods.</p><p>As the adhesive layer constituting the colored hard film of the present invention, a well-known adhesive or adhesive can be suitably used, and it is not particularly limited. Moreover, the so-called adhesion layer here refers to the thing used to stick the colored hard film film on the surface of the image display, which is different from the adhesion layer used to improve the adhesion of the biaxially oriented polyester film. Since the adhesive layer used in the present invention has moderate adhesiveness and has less paste residue during peeling, it has excellent re-peelability. Therefore, the adhesive resin with lower glass transition temperature or the thermoplastic elastomer with rubber elasticity and Adhesive composed of wax mixture is preferred.</p><p>Examples of adhesive resins with low glass transition temperature include acrylic resins or silicone resins, and examples of thermoplastic elastomers with rubber elasticity include ethylene-vinyl acetate copolymer, butadiene rubber, and styrene-butadiene. Synthetic rubber and natural rubber such as olefin rubber, nitrile rubber, nitrile-butadiene rubber, high styrene rubber, acrylic rubber, etc.</p><p>In addition, the adhesive layer may be covered with a release film (separation film) if necessary. The release film can use general paper materials, silicone release paper, plastic film, and silicone release film, and there are no special restrictions.</p><p>The layers other than the transparent base film forming the colored hard film film of the present invention may be cured individually or simultaneously if necessary. In particular, when the ultraviolet absorbing resin composition is used in two or more layers, it is preferable to use the following curing method to effectively cure the coating film.</p><p>First, when the coating film of the UV-curing resin composition other than the outermost layer is in a semi-cured state and each coating film is cured at the same time by ultraviolet radiation, the photocuring initiator of the reaction depends on the wavelength characteristics of the ultraviolet light source used for the ultraviolet radiation. For optional use, several coating layers of the ultraviolet-curing resin composition can be mixed with light-curing initiators with different peaks in the absorption wavelength range. Such a coating film in which each layer is added with a light-hardening initiator with different peaks in the absorption wavelength range is extremely easy to adjust and harden, and it can be effectively hardened. In other words, the wavelength range of the spectrum irradiated by the ultraviolet light source can effectively use the selected wavelength to easily reach each layer, and a cured coating film with improved adhesion between the substrate and the multilayer coating film can be obtained.</p><p>The anti-reflection layer used in the present invention can be used as long as it does not impair the aforementioned optical properties of the colored hard coat film, and there are no special restrictions. Specific examples of the anti-reflection layer include (1) MgF with a thickness of about 0.1μm₂Anti-reflection layer composed of extremely thin films, (2) Anti-reflection layer formed of metal vapor-deposited film (3) A layer composed of a material whose refractive index is lower than that of the hard coat layer is placed on the hard coat layer The reflection prevention layer, (4) the high refractive index layer with high light refractive index is arranged on the hard coat layer, and the reflection of the low refractive index layer with a lower refractive index than the high refractive index layer is arranged on the high refractive index layer Anti-reflection layer (for example, a non-uniform ultrafine layer of metal oxide with high refractive index in the portion of the anti-reflection layer adjacent to the hard coat layer), (5) Multi-layer stacking of the above-mentioned (4) layer structure Type anti-reflection layer, (6) on the inner side of the high refractive index layer with high refractive index (the display surface side when pasted on the display surface) is provided with a lower refractive index layer than the high refractive index layer. The outer side of the high refractive index layer with high rate (when pasted on the display surface Different sides of the display surface) a low-refractive-index layer whose refractive index is lower than that of the middle-refractive-index layer is provided with an anti-reflection layer.</p><p>Among these, because it can more effectively prevent reflection, the colored hard coat film as shown in FIG. 9 and FIG. 10 is used to pass through the hard coat layer 4 on the transparent base film 1 and the middle refractive index layer 51 , The high refractive index layer 52 and the low refractive index layer 53 are preferably formed in order. In addition, since the dispersion of the pigment is more uniform and easy to suppress stains, the colored hard coat film in Figure 10 is better. In addition, the low refractive index layer 53, the medium refractive index layer 51, and the high refractive index layer 52 are composed of SiOx. The refractive index of the low refractive index layer 53 is greater than 1.4, and the refractive index of the high refractive index layer 52 is lower than 2.2. The thickness of the layer 53 is 80 to 110 nm, the thickness of the high refractive index layer 52 is 30 to 110 nm and the thickness of the medium refractive index layer 51 is 50 to 100 nm, and the optical film thickness of each layer is D (D=n·d, n: medium refractive index layer The refractive index, d = the thickness of the middle refractive index layer) is preferably a reflection prevention layer below the visible light wavelength.</p><p>The antifouling layer used in the present invention is preferably a water-repellent paint using fluorine-based or silicone-based resin. For example, from SiO₂When forming the low refractive index layer of the anti-reflection layer, fluorosilicate water-repellent paint is preferred.</p><heading level="1">[Example]</heading><p>Hereinafter, the present invention will be explained in more detail with examples. In addition, each characteristic quality in the examples was measured or evaluated according to the following methods. In addition, the parts and ratios in the examples indicate parts by weight and ratios by weight unless specifically limited.</p><p>(1) Total light transmittance and turbidity quality</p><p>According to JIS K6714-1958, the total light transmittance Tt (%) and scattered light transmittance Td (%) were measured using a turbidity meter (NDH-20) manufactured by Nippon Denshoku Industries Co., Ltd.</p><p>The total light transmittance obtained is evaluated according to the following standards. Evaluation 2 or higher is considered practically no problem, and evaluation 3 is extremely superior.</p><p><img file="TW583263B_D0083.tif" /></p><p>The total light transmittance Tt (%) and the scattered light transmittance Td (%) obtained by the self-measurement are calculated according to the following formula to calculate the turbidity (%).</p><p>Turbidity (%)=(Td/Tt)×100</p><p>The haze value of the obtained biaxially oriented polyester was evaluated based on the following criteria.</p><p>: Turbidity value2.0% (A small turbidity value can actually be used extremely well.)</p><p>: 2.0%&lt;turbidity value3.0% (small turbidity value can actually be used well.)</p><p>: 3.0%&lt;turbidity value5.0% (the turbidity value is also small, there is no problem in actual use.)</p><p>×: 5.0%&lt;turbidity value (large turbidity value is practically problematic.)</p><p>The haze value of the resulting colored hard film film was evaluated based on the following criteria.</p><p>: Turbidity value 2.0% (almost no turbidity, very good)</p><p>: 2.0%&lt;turbidity value3.0% (small turbidity value is practically good)</p><p>: 3.0%&lt;turbidity value5.0% (turbidity value without practical problems)</p><p>: 5.0%&lt;turbidity value10% (turbidity has some practical problems)</p><p>×: 10%&lt;turbidity value (large turbidity value cannot be actually used)</p><p>(2) The light transmission characteristics of visible light with a wavelength of 400 to 650nm</p><p>Using the spectrophotometer MPC3100 manufactured by Shimadzu Corporation, measure the transmittance of visible light with a wavelength of 450-650nm, and obtain the transmittance of each wavelength, the maximum absorption wavelength in a specific wavelength range and the half-height width of its peak.</p><heading level="1">(3) Contrast</heading><p>A 30W fluorescent lamp was used to irradiate the test CRT from 45° above the horizontal, and the highest brightness on the screen at an angular position about 30° above the horizontal was measured with a luminance meter (manufactured by Minoruta). In addition, a 30W fluorescent lamp is used to illuminate a CRT with a 30W fluorescent lamp from 45° above the horizontal and the power is turned off without emitting light. A luminance meter (manufactured by Minoruta) is used to measure that the regular reflection light will not directly enter the angular position of about 30° above the horizontal. The lowest brightness on the screen. In this way, the highest brightness is divided by the lowest brightness to obtain the contrast 1 (highest brightness/lowest brightness). Then, the test sample was pressed and pasted on the CRT with an adhesive, and the maximum brightness and the minimum brightness were measured again as described above, and the maximum brightness obtained was divided by the minimum brightness to obtain the contrast 2 (maximum brightness/minimum brightness). In this way, the larger value of (contrast2/contrast1)×100(%) is considered good, and it is evaluated based on the following criteria.</p><p>: (Contrast 2 / Contrast 1)×100% is 120% or more,</p><p>: (Contrast2/Contrast1)×100% is 100% or more and 120% or less,</p><p>X: (Contrast2/Contrast1)×100% is 100% or less,</p><heading level="1">(4) Hue coincidence</heading><p>L*, a*, and b* are calculated from the transmission spectrum of the test film to the standard light A in accordance with JIS standard Z8729 using the L*a*b* color system, and the ab chromaticity (C*ab) is calculated by the following formula.</p><p>C*ab=((a*)²+(b*)²)¹^/²</p><p>Based on the obtained C*ab, the degree of agreement between achromatic color and chroma is evaluated based on the following criteria.</p><p>: C*ab is 10 or less</p><p>: C*ab is 10 or more and 20 or less</p><p>X: C*ab is 20 or more</p><heading level="1">(5) Color purity</heading><p>According to JIS standard Z8701, the chromaticity coordinates (CIE color system) of each luminous body (blue, green, red) emitted by the picture tube are respectively calculated. In the same way, calculate the chromaticity coordinates of each luminous body pasted on the picture tube for the test sample, and evaluate the color purity of the three primary colors according to the following criteria. However, when the chromaticity coordinates of each luminous body of the pasted sample are close to the chromaticity coordinates of a single wavelength (460nm, 560nm, 620nm), it is judged that the color purity is improved.</p><p>: The color purity of the three primary colors is all improved</p><p>: Among the three primary colors, 2 colors increase and 1 color decreases</p><p>: One color increases while the other decreases</p><p>×: All decrease or no change</p><heading level="1">(6) Internal reflectivity</heading><p>Take the adhesive layer of the adhesive film as the inner surface (either side when coated on both sides) When the point light source is irradiated at an angle of 45° from the surface of the biaxially aligned film, when the film thickness is d, the reflected light from the main reflection d/0.707 is used as the internal reflection, and this is divided by the amount of light of the point light source The value is taken as the reflectance. Evaluate it based on the following benchmarks.</p><p>: The internal reflectance is 0.4% or less</p><p>X: The internal reflectance is 0.4% or more</p><heading level="1">(7) Adhesion</heading><heading level="1">a. For adhesive</heading><p>Coat an acrylic adhesive with a thickness of 10μm on the adhesive layer of the adhesive film. After placing it in a constant temperature and humidity bath at 60°C and 80%RH for 24 hours, stick it with an epoxy-based adhesive and conduct a peel test. Evaluation is based on the following criteria.</p><p>: The degree of breakage of the substrate film shows strong adhesion</p><p>: It is practicable even though it is peeled off</p><p>×: Easy to peel off but not practical</p><heading level="1">b. To the dura mater</heading><p>Form a hard coat with a thickness of 5μm on the adhesive layer of the adhesive film and cut it crosswise into squares (100 grids on each side of 1mm), and stick a 24mm wide transparent tape (manufactured by Nippon Corporation) on it at 180 degrees After the peeling angle is sharply peeled off, observe the peeling surface and evaluate with the following criteria . ...</p><p>: The peeling area is less than 10%...The adhesive force is extremely good</p><p>: The peeling area is 10% or more and 20% or less...... Good adhesion</p><p>: The peeling area is more than 20% and less than 30%...... Adhesive force is still good</p><p>: The peeling area is 30% or more and 40% or less...... Poor adhesion</p><p>×: The peeling area exceeds 40%... The adhesion is extremely poor</p><heading level="1">(8) Detection of ionic low molecular weight compounds</heading><p>XPS (X-ray photoelectron spectroscopy) is used to analyze the surface of the adhesive layer of the adhesive film to determine the content of ionic low-molecular-weight compounds. The content of the detected ionic low-molecular-weight compounds is shown below.</p><p>: The content of ionic low-molecular-weight compounds is less than 1000ppm</p><p>×: The content of ionic low molecules exceeds 1000ppm</p><heading level="1">(9) Film/film friction coefficient</heading><p>Place a fixed glass under the two overlapped samples on the surface and the inner surface, pull the film under the overlapped film (the film in contact with the glass plate) with a constant speed roller (10cm/min), one end of the upper film (and the lower side) The opposite end of the film pulling direction) is fixed to the testing machine and the tensile force (F) between the film and the film is tested. Also, the thread on the upper film used at the time The underside area of the system is 50cm²(80mm×62.5mm), the hardness of the film connection surface is 80. The weight (W) of chloroprene rubber is 1.2kg. The coefficient of static friction (μs) is calculated by the following formula.</p><p>μs=F(g)/W(g)</p><heading level="1">(10) Refractive index in the thickness direction of the adhesive layer</heading><p>Use an Abbe refractometer and use the sodium D line as the light source to measure it. In addition, diiodomethane was used as the measurement liquid, and the atmosphere was measured at 25°C and 65% RH.</p><heading level="1">(11) As an evaluation of the surface reflection of the identification improvement film</heading><p>The non-luminous test CRT was irradiated with 700 1x external light, and the reflection brightness 1 was measured with a brightness meter (manufactured by Minoruta). Then stick the test sample on the CRT with an adhesive, and measure the reflection brightness again2. The value of (reflected brightness 2/reflected brightness 1)×100% is evaluated by the following distinctions.</p><p>: (reflected brightness 2/reflected brightness 1)×100% is 20% or less,</p><p>: (reflection brightness 2/reflection brightness 1)×100% is 20% or more and 30% or less,</p><p>: (reflection brightness 2/reflection brightness 1)×100% is 30% or more and 40% or less,</p><p>×: (reflection brightness 2 / reflection brightness 1) × 100 for 40% above,</p><heading level="1">(12)Identification improves the wear resistance of the film</heading><p>Install the steel wire wool #000 on the square pad (with an area of 6.25cm²), the sample reciprocating abrasion tester is subjected to abrasion test (load 1Kg, reciprocating 50 times), calculate the difference between the turbidity values before and after (turbidity) by the following formula.</p><p>Turbidity = (turbidity value after abrasion test)-(turbidity value before abrasion test)</p><p>From the obtained Δ turbidity, the abrasion resistance was evaluated as follows.</p><p>:The turbidity is less than 10</p><p>: The turbidity is above 10 and below 20</p><p>X: Turbidity exceeds 20</p><heading level="1">(13) Light resistance</heading><p>Using Toyo Seiki Co., Ltd.'s xenon lamp aging tester, with an irradiance of 765W/m², 300-800nm wavelength light irradiates the sample film for 100 hours, and uses a colorimeter (SZS-Σ90 manufactured by Nippon Denshi Kogyo Co., Ltd.) to measure the tristimulus value (including visual transmittance), L*a* before and after the irradiation b* (chromaticity coordinates), YI (yellowness), are evaluated according to the following criteria. Because it is not a problem to use in the house, is It has a level of resistance to light deterioration that is not a problem even when used indoors.</p><p>: The change in visual transmittance is within 3% and the degree of yellowing is within 4</p><p>: The change in visual transmittance exceeds 3% and/or the degree of yellowing exceeds 4</p><heading level="1">(14)Spots on the inner surface of the film</heading><p>Using the color difference meter SZS-Σ90 manufactured by Nippon Denshoku Kogyo Co., Ltd., determine the L*a*b* (chromaticity coordinate) of the C light source at 50 points randomly selected on the inner surface of the sample film, and the maximum value (a*_m_a_x, B*_m_a_x) And the minimum value (a*_m_i_n, B*_m_i_n) Calculate ΔC*ab according to the following formula.</p><p>ΔC*ab=((a*_m_a_x-a*_m_i_n)²+(b*_m_a_x-b*_m_i_n)²)¹^/²</p><p>From the obtained ΔC*ab, the stain on the inner surface of the film was evaluated according to the following criteria.</p><p>: ΔC*ab is 3 or less, very good usability</p><p>: ΔC*ab is 3 or more and 5 or less, and there is no practical problem.</p><p>×: ΔC*ab is 5 or more, which is practically problematic.</p><heading level="1">Example 1</heading><p>It contains 0.007 wt% intrinsic viscosity 0.65 (35°C , O-chlorophenol solution) to polyethylene terephthalate of porous silica with an average particle size of 1.7μm, a small uniaxial screw feeder is used to add 0.05% by weight of polyethylene terephthalate manufactured by Mitsui Chemicals Co., Ltd. Dye (trade name: HS-299) granulation, the obtained polyethylene terephthalate composition is made into a molten state by an extruder (shear speed 65 (1/sec), residence time 600 seconds) After that, it is extruded from the die and cooled with a cooling drum according to the usual method to make an unstretched film.</p><p>Then, the unstretched film was temporarily not wound, and then stretched in the longitudinal direction at a stretch magnification of 3.5 times in a heated state at 90°C. After being stretched at a stretching ratio of 3.8 times in the transverse direction under heating at 95°C, it was subjected to stress heat treatment at 230°C to obtain a biaxially oriented polyester film with a thickness of 75 μm. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 1.</p><heading level="1">Example 2</heading><p>In Example 1, except that the thickness was changed to 200 μm and the pigment and its added amount were changed to 0.02% by weight, the weight ratio of Mitsui Chemicals Dye (trade name: HS-307) and Nippon Kayaku Dye (trade name: Kayaset YellowEG) Repeat the same operation except for the 20:1 blend. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 1.</p><heading level="1">Example 3</heading><p>Will contain 0.04% by weight of Mitsui Chemicals dyes (trade name: HS-299), 0.007 wt% polyvinyl naphthalate of porous silica with an intrinsic viscosity of 0.64 (35°C, o-chlorophenol solution) and an average particle size of 1.7 μm, which is made into a molten state by an extruder (shear speed 65 ( 1/sec), after 600 seconds of residence time), extrude from the die, and cool with a cooling drum according to the usual method to make an unstretched film.</p><p>Then, the unstretched film is not wound temporarily, and then stretched in the longitudinal direction at a stretch magnification of 3.5 times under heating at 140°C, and stretched at a stretch magnification of 3.8 times in the transverse direction under heating at 135°C, and then subjected to tension heat treatment at 230°C , A biaxially aligned polyester film with a thickness of 50μm was obtained. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 1.</p><heading level="1">Example 4</heading><p>In Example 1, Mitsui Chemicals Dyes (trade name: HS-296), Nippon Kayaku Dyes (trade name: Kayaset OrangeAN), and Nippon Kayaku Dyes ( Trade name: Kayaset Green AB) Except for the blend with a weight ratio of 10:3:3, repeat the same operation. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 1.</p><heading level="1">Comparative example 1-4</heading><p>In Example 1, the same operation was repeated except that the dye and its added amount were changed to those shown in Table 1. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 1.</p><p><tables><img file="TW583263B_D0084.tif" /></tables></p><p>In addition, in Table 1, PET indicates polyethylene terephthalate, PEN indicates polyethylene-2,6-naphthalenedicarboxylate, and the color codes (A to F) indicate the following dyes and pigments.</p><p>A: Dyestuffs manufactured by Mitsui Chemicals (trade name: HS-299)</p><p>B: A blend of Mitsui Chemicals dye (trade name: HS-307) and Nippon Kayaku Dye (trade name: Kayaset YellowE) at a weight ratio of 20:1</p><p>C: Mitsui Chemicals dyes (trade name: HS-296), Nippon Kayaku dyes (trade name: Kayaset OrangeAN) and Nippon Kayaku dyes (trade name: Kayaset Green AB) are blended in a weight ratio of 10:3:3 Compound</p><p>D: Dyes manufactured by Nippon Kayaku (trade name: Kayaset BlueA2R)</p><p>E: Dyes manufactured by Nippon Kayaku (trade name: Kayaset BlackAN)</p><p>F: Carbon Black (Trade Name: 4818Black15F-7,5)</p><heading level="1">Example 5</heading><p>Polyethylene terephthalate containing porous silica with an intrinsic viscosity of 0.65 (35°C, o-chlorophenol solution) and an average particle size of 1.7μm is added to polyethylene terephthalate with a small uniaxial screw feeder. Terephthalic acid is 0.05% by weight of Mitsui Chemicals Dye (trade name: HS-299) granules, and the resulting polyethylene terephthalate composition is made into a molten state by an extruder (shear rate) 65 (1/sec), retention time of 600 seconds), extrude from the die, according to the usual method The cooling roller is cooled to form an unstretched film.</p><p>Then, the unstretched film was not wound temporarily, and then stretched in the longitudinal direction at a stretch magnification of 3.5 times under heating at 90°C, and then an aqueous solution of the following coating film composition with a concentration of 8% was uniformly applied to it with a roll coater On both sides. Then, while drying at 95°C, it was stretched 3.8 times in the lateral direction at 120°C, and then heat-fixed at 230°C to obtain an adhesive film with a thickness of 75 μm. In addition, the thickness of the coating film was 0.15 μm, and the refractive index in the thickness direction was 1.559. The evaluation results of the obtained adhesive film are shown in Table 2.</p><heading level="1">Composition for coating film</heading><p>The acid component is 2,6-naphthalene dicarboxylic acid (70 mol%), isophthalic acid (24 mol%) and sodium 5-sulfoisophthalate (6 mol%), and the glycol component is ethyl Copolyester with Tg85°C synthesized by glycol (90 mol%) and diethylene glycol (10 mol%): 75% by weight</p><p>The constituents are methacrylate 15 mol%, ethyl acrylate 75 mol%, N-methylol acrylamide 5 mol%, 2-hydroxyethyl methacrylate 5 mol% Synthetic acrylic copolymer of Tg0°C: 15% by weight</p><p>Polyoxyethylene (N=7) lauryl ether: 10% by weight</p><heading level="1">Examples 6 to 8</heading><p>Except for changing the composition of the coating film composition to those shown in Table 2, and In Example 5, the same operation was performed to obtain an easy-adhesive film having a thickness of 75 μm. In addition, the thickness of the coating film was 0.15 μm. The evaluation results of the obtained adhesive film are shown in Table 2.</p><p><tables><img file="TW583263B_D0085.tif" /></tables></p><p>The symbols (P1, H, I1, J2, and Y1) of the composition for coating film in Table 2 indicate the following polymers or compounds, respectively.</p><heading level="1">Waterborne polyester</heading><p>P1: The acid component is 2,6-naphthalenedicarboxylic acid (70 mol%), isophthalic acid (24 mol%) and sodium 5-sulfoisophthalate (6 mol%), glycol component It is a copolyester (Tg85°C) synthesized by ethylene glycol (90 mol%) and diethylene glycol (10 mol%).</p><heading level="1">Acrylate</heading><p>H: Synthesized by 15 mol% of methacrylate, 75 mol% of ethyl acrylate, 5 mol% of N-methylol acrylamide, and 5 mol% of 2-hydroxyethyl methacrylate Acrylic copolymer of Tg0°C</p><heading level="1">additive</heading><p>J1: Silica filler (average particle size 100nm)</p><p>J2: A mixture of silica filler (average particle size 100nm) and carnauba wax in a weight ratio of 5:3</p><heading level="1">Surfactant</heading><p>Y1: Polyoxyethylene (N=7) lauryl ether</p><heading level="1">Example 9</heading><p>On the single-sided coating film of the adhesive film of Example 5, the UV curable composition composed of the following composition was uniformly coated with a roller coater so that the film thickness after curing became 5 μm.</p><p><img file="TW583263B_D0086.tif" /></p><p>Then, a high-pressure mercury lamp with an intensity of 80 W/cm was irradiated with ultraviolet rays for 30 seconds to harden the hard coat layer.</p><p>Then, sputtering is used on the hard film layer according to the low refractive index layer (SiO₂, 30nm), high refractive index layer (TiO₂, 30nm), low refractive index layer (SiO₂, 30nm), high refractive index layer (TiO₂, 100nm) and low refractive index layer (SiO₂, 100nm) in order to form the anti-reflection layer. Table 3 shows the evaluation results of the obtained hard film for optics.</p><heading level="1">Examples 10-12</heading><p>In Example 9, the same operation was repeated except that the film forming conditions related to the polymer, stretching temperature, and stretching ratio of the biaxially oriented polyester film were changed to those of Examples 2-4 shown in Table 1. . Table 3 shows the evaluation results of the obtained hard film for optics.</p><heading level="1">Comparative examples 5 to 8</heading><p>In Example 9, the film forming conditions related to the polymer, elongation temperature, and elongation ratio of the biaxially oriented polyester film were changed to those of Comparative Examples 1-4 shown in Table 1, and the adhesive layer was formed The composition for coating film was changed to the following, and the same operation was repeated. Table 3 shows the evaluation results of the obtained hard film for optics.</p><heading level="1">Composition for coating film</heading><p>The acid component is 2,6-naphthalene dicarboxylic acid (70 mol%), isophthalic acid (24 mol%) and sodium 5-sulfoisophthalate (6 mol%), and the glycol component is ethyl Copolyester with Tg85°C synthesized by glycol (90 mol%) and diethylene glycol (10 mol%): 75% by weight</p><p>The constituents are methacrylate 15 mol%, ethyl acrylate 75 mol%, N-methylol acrylamide 5 mol%, 2-hydroxyethyl methacrylate 5 mol% Synthetic acrylic copolymer of Tg0°C: 15% by weight</p><p>Polyoxyethylene (n=7) lauryl ether: 10% by weight</p><p><tables><img file="TW583263B_D0087.tif" /></tables></p><p>The following discusses Tables 1 to 3. It can be seen from Table 1 that the biaxially oriented polyester film of the present invention (Examples 1-4) has high color purity, contrast and transmittance. Moreover, it can be seen from Table 2 that the adhesive film (Examples 5-8) forming the adhesive layer on the biaxially oriented polyester film of the present invention has good adhesiveness to the glass adhesive and hard film without compromising the optical properties. Moreover, the hard coat film (Examples 9-12) provided with a hard coat layer and an anti-reflection layer on the optical adhesive film of the present invention has color purity, contrast, transmittance, abrasion resistance, and anti-reflection properties. Any aspect of it is superior. In contrast, the biaxially oriented polyester film of Comparative Examples 1-6 and the hard coat film of Comparative Examples 7-12, which cannot satisfy any of the requirements of the present invention, can only obtain inferior optical properties.</p><heading level="1">Example 13</heading><p>Polyethylene terephthalate (intrinsic viscosity [η]=0.65) containing 0.01% by weight of dye (manufactured by Mitsui Chemicals, trade name: HS-299) and 0.007% by weight of porous silica with an average particle size of 1.7 μm Extrude from the die in a molten state, and cool it with a cooling drum according to the usual method to make an unstretched film. Then, the unstretched film was not wound temporarily, and then the aqueous solution of the composition for coating film shown below 8% was uniformly coated on both sides with a roll coater. Then, while drying at 95°C, it was stretched 3.8 times in the transverse direction at 120°C, and subjected to stress heat treatment at 230°C to obtain a colored biaxially oriented polyester film with a thickness of 188 μm.</p><heading level="1">Composition for coating film</heading><p>The acid component is 2,6-naphthalene dicarboxylic acid (70 mol%), isophthalic acid (24 mol%) and sodium 5-sulfoisophthalate (6 mol%), and the glycol component is ethyl Copolyester with Tg85°C synthesized by glycol (90 mol%) and diethylene glycol (10 mol%): 75% by weight</p><p>The constituents are methacrylate 15 mol%, ethyl acrylate 75 mol%, N-methylol acrylamide 5 mol%, 2-hydroxyethyl methacrylate 5 mol% Synthetic acrylic copolymer of Tg0°C: 15% by weight</p><p>Polyoxyethylene (n=7) lauryl ether: 10% by weight</p><p>On one side of the obtained colored biaxially oriented polyester film, the hard film coating agent (trade name: PETD-31, manufactured by Daiichi Seika) for forming the hard film layer was coated by roll coating to make the thickness dry It becomes 6 μm, and after drying, it is irradiated with electron beams under the conditions of 175 kv and 10 Mrad to form a hard coat film.</p><p>On the other hand, on the opposite side of the laminated hard coat layer of the colored biaxially oriented polyester film, the adhesive used to form the adhesion layer (the composition is shown in Table 4) was coated by a roll coating method to make the dry thickness 20μm, and the result was as follows: Figure 4 shows a colored hard coat film of layer structure 1. The adhesive surface of the obtained colored hard film film was treated with silicone and a PET film with a thickness of 50 μm was used as a release film (release film). The characteristics of the resulting colored hard coat film are shown in Table 8.</p><p><tables><img file="TW583263B_D0088.tif" /></tables></p><heading level="1">Example 14</heading><p>Except that the transparent base material is not added with pigment and the adhesive used to form the adhesion layer is changed to the composition shown in Table 5, the same operation as in Example 13 is repeated to obtain a hard colored layer structure 2 as shown in Figure 5Membrane. Film film. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><p><tables><img file="TW583263B_D0089.tif" /></tables></p><heading level="1">Example 15</heading><p>Except that the transparent substrate does not add pigments and the hard coat agent for forming the hard coat layer is changed to the composition shown in Table 6, and the dry thickness of the hard coat layer is 20μm and the electron beam irradiation conditions when the hard coat layer is formed Change to Except for the conditions of 185kv and 1020Mrad, the same operation as in Example 1 was repeated to obtain a colored hard coat film of layer structure 3 as shown in Figure 6. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><p><tables><img file="TW583263B_D0090.tif" /></tables></p><heading level="1">Example 16</heading><p>Apply an easy-adhesive polyethylene terephthalate film (trade name: OPFW-188, manufactured by Teijin Co., Ltd.) on one side with a thickness of 188μm on both sides, and roll coating to form a coloring layer. The coating agent (composition shown in Table 7) was coated on it so that the dry thickness became 10 μm, and after drying, it was irradiated with electron beams under 175 kv and 5 Mrad conditions to obtain a hard coat film of a colored layer and a transparent substrate.</p><p><tables><img file="TW583263B_D0091.tif" /></tables></p><p>Then, on one side of the transparent base material of the hard film film, a hard film coating agent (trade name: PETD-31, manufactured by Dainichi Seika) for forming the hard film layer was coated on it by a roll coating method. The dry thickness becomes 6 μm, and after drying, it is irradiated with electron beams under the conditions of 175 kv and 10 Mrad to form a hard coat film. On the other hand, on the surface of the colored layer of the hard film film, an adhesive (manufactured by Soken Chemical Co., Ltd., trade name: SKDYIN) 1425 (D-90)) for forming the adhesive layer was applied by roll coating to make the dry thickness 20μm. , The colored hard film with layer structure 4 as shown in Figure 7 is obtained. A PET film with a thickness of 50 μm was treated with silicone on the surface of the adhesive layer of the obtained colored hard film film as a release film (release film). The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Example 17</heading><p>Except that the position of the colored layer was changed from between the adhesion layer and the transparent base film to between the hard film and the transparent base film, the same as in Example 16 was repeated. In this way, a hard coat film with layer structure 5 as shown in Fig. 8 is obtained. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Example 18</heading><p>Prepare a biaxially stretched polyethylene terephthalate film (manufactured by Teijin Co., Ltd., trade name; A31-50) with a thickness of 50μm as a shaped film, and prepare a pair of 100 parts by weight of ZrO with metal rods₂Microparticles (manufactured by Sumitomo Osaka Cement Co., Ltd., trade name; No. 1257) containing 0.3 parts by weight of a binder resin (ionizing radiation curable organosilicon compound) coating liquid is applied to one of the surfaces to form a dry thickness (Thickness when dried) is an uncured coating film for the refractive index layer (refractive index 1.74) in 57nm.</p><p>Next, the hard coat film of the coloring layer and the transparent base film before the hard coat layer formation used in the foregoing Example 16 was prepared, and the hard coat coating agent ( Made by Dainichi Seika, trade name: PETD-31) coated on it so that the dry thickness becomes 6μm, and the solvent component is dried to form an uncured hard coat layer. Then, the uncured medium refractive index layer provided on the aforementioned shaped film and the uncured hard film layer provided on the transparent base film surface of the aforementioned hard film film are connected, laminated and crimped, and the pressure is 480mJ (10m/ Under the condition of min), irradiate ultraviolet rays to harden the unhardened middle refractive index layer and the hard coat layer to form the hardened middle refractive index layer and the hard coat layer, and peel off the aforementioned shaped film attached to the middle refractive index layer. It is removed to obtain a colored hard coat film composed of a colored layer, a transparent base film, a hard coat layer and a medium refractive index layer.</p><p>In addition, ITO sputtering (refractive index: 2.0, vacuum degree 5x10) is introduced on the refractive index level of the above colored hard film film.^-⁶Torr, the substrate temperature is room temperature, argon is 100 scc/min, oxygen is scc/min), and a 105nm thick high tortuosity layer is formed at 1.6 angstroms per second. Then, on the high refractive index layer of the colored hard film film, the vacuum degree is 5x10^-⁶Torr, the substrate temperature is room temperature, and the evaporation rate is 1.6 angstroms per second, so that SiO (refractive index: 1.46) is formed into an 85nm-thick low tortuosity layer. In addition, a fluorine surfactant (manufactured by 3M Company, trade name: FC-722) was coated with a metal rod on the low refractive index layer of the colored hard film film to form a 2nm thick antifouling layer. On the other hand, on the colored layer of the colored hard film film, the adhesive used in Example 13 to form the adhesion layer was used, and it was coated by roll coating to form an adhesion layer with a dry thickness of 20μm, and the layer shown in Figure 9 was obtained. Structure 6 is a colored hard film with anti-fouling and anti-reflective properties. In addition, from the viewpoint of convenience, the surface of the adhesion layer of the obtained colored hard film film was protected by a protective film with a thickness of 50 μm after treatment with silicone. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Example 19</heading><p>In Example 18, except that the colored layer biaxially oriented polyester film of Example 13 was used instead of the biaxially oriented polyester film without a colored layer, the same operation was repeated to obtain the layer structure 7 shown in Figure 10. The anti-fouling colored hard film with anti-reflective properties. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Comparative example 9</heading><p>A hard coat film having the same structure as in Example 13 except that no dye was added was obtained. The characteristics of the obtained hard film are shown in Table 8.</p><heading level="1">Comparative example 10</heading><p>The same operation as in Example 13 was repeated except that the dye was changed to a dye manufactured by Nippon Kayaku (trade name: Kayaset BlueA2R) and the addition amount was changed to 20 parts by weight. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Comparative example 11</heading><p>The same operation as in Example 13 was repeated except that the dye was changed to a dye manufactured by Nippon Kayaku Co., Ltd. (trade name: Kayaset BlackAN) and the addition amount was changed to 20 parts by weight. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><heading level="1">Comparative example 12</heading><p>The same operation as in Example 13 was repeated except that the pigment was changed to Nippon Kayaku's pigment carbon black (trade name: 4818 Black15F-7) and the addition amount was changed to 20 parts by weight. The characteristics of the obtained colored hard coat film are shown in Table 8.</p><p><tables><img file="TW583263B_D0092.tif" /></tables></p><p>Here, the dyes A to F in Table 8 above are the following dyes or pigments.</p><p>A: Dyestuffs manufactured by Mitsui Chemicals (trade name: HS-299)</p><p>B: Dyes manufactured by Mitsui Chemicals (trade name: HS-307) and dyes manufactured by Nippon Kayaku (trade name: Kayaset YellowEG, a blend of 20:1 by weight)</p><p>C: Mitsui Chemicals dyes (trade name: HS-296), Nippon Kayaku dyes (trade name: Kayaset OrangeAN) and Nippon Kayaku dyes (trade name: Kayaset Green AB) are blended in a weight ratio of 10:3:3 Compound</p><p>D: Dyes manufactured by Nippon Kayaku (trade name: Kayaset BlueA2R)</p><p>E: Dyes manufactured by Nippon Kayaku (trade name: Kayaset BlackAN)</p><p>F: Carbon Black (Trade Name: 4818 Black15F-7,5)</p><heading level="1">Example 20</heading><p>In Example 1, in addition to the addition of pigments and 2,2'-p, p'-phenylene bis(3,1-benzoxan<img file="TW583263B_D0093.tif" />-4-ketone) 1.0% by weight was used as the ultraviolet absorber, and the same operation was repeated. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 9.</p><heading level="1">Example 21</heading><p>In Example 2, in addition to the addition of pigments and 2,2'-p, p'-phenylene bis(3,1-benzox<img file="TW583263B_D0094.tif" />-4-one) 1.0% by weight as Repeat the same operation except for the ultraviolet absorber. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 9.</p><heading level="1">Example 22</heading><p>In Example 3, in addition to the addition of pigments and 2,2'-p, p'-phenylene bis(3,1-benzoxan<img file="TW583263B_D0095.tif" />-4-ketone) 1.0% by weight was used as the ultraviolet absorber, and the same operation was repeated. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 9.</p><heading level="1">Example 23</heading><p>In Example 4, in addition to adding pigments and 2,2'-p, p'-phenylene bis(3,1-benzoxan<img file="TW583263B_D0096.tif" />-4-one) 0.5% by weight and 2-p-nitrophenyl-3,1-benzox<img file="TW583263B_D0097.tif" />-4-ketone) 0.5% by weight was used as the ultraviolet absorber, and the same operation was repeated. The evaluation results of the optical properties of the obtained biaxially aligned polyester film are shown in Table 9.</p><p><tables><img file="TW583263B_D0098.tif" /></tables></p><p>Here, the ultraviolet absorbers indicated by the symbols U and V in Table 9 are the following.</p><p>U: 2,2'-pair, p-'-phenylene bis(3,1-benzox<img file="TW583263B_D0099.tif" />-4-one)</p><p>V: 2-p-nitrophenyl-3,1-benzox<img file="TW583263B_D0100.tif" />-4-one)</p><heading level="1">Example 24</heading><p>In Example 5, in addition to the addition of pigments and 2,2'-p, p'-phenylene bis(3,1-benzoxan<img file="TW583263B_D0101.tif" />-4-one) 0.5% by weight was used as the ultraviolet absorber, and the same operation was repeated. The evaluation results of the obtained adhesive film are shown in Table 10.</p><heading level="1">Examples 25-27</heading><p>In Example 24, except that the adhesive layer was changed to the composition shown in Table 10, the same operation was repeated. The evaluation results of the obtained adhesive film are shown in Table 10.</p><p><tables><img file="TW583263B_D0102.tif" /></tables></p><p>The symbols (P1, P2, P3, K1, K2, K3, J3, Y1, and Y2) of the composition for coating in Table 10 indicate the following polymers or compounds, respectively.</p><heading level="1">Waterborne polyester</heading><p>P1: The acid component is 2,6-naphthalenedicarboxylic acid (70 mol%), isophthalic acid (24 mol%) and sodium 5-sulfoisophthalate (6 mol%), and the diol component is Copolyester (Tg85°C) of ethylene glycol (90 mol%) and diethylene glycol (10 mol%).</p><p>P2: The acid component is terephthalic acid (90 mol%), isophthalic acid (6 mol%) and calcium 5-sulfoisophthalate (4 mol%), and the glycol component is ethylene glycol (95 mol%) and neopentyl glycol (5 mol%) copolyester (Tg68°C)</p><p>P3: The acid component is terephthalic acid (85 mol%) and isophthalic acid (15 mol%), and the diol component is ethylene glycol (57 mol%), 1,4-butanediol (40 Mol%), diethylene glycol (2 mol%) and polyethylene glycol (molecular weight 600) (1 mol%) of copolyester (Tg=47°C)</p><p>Fatty acid amide, fatty acid bisamide</p><p>K1: N,N'-methylene bisstearylamine</p><p>K2: N,N'-ethylene dipalmitamide</p><p>K3: N,N'-ethylene bisoctamide</p><heading level="1">additive</heading><p>J3: Acrylic resin fine particles (average particle size 0.03μm)</p><heading level="1">Surfactant</heading><p>Y1: Polyoxyethylene (N=7) lauryl ether</p><p>Y2: Polyoxyethylene nonylphenyl ether</p><heading level="1">Example 28</heading><p>In Example 9, in addition to the pigment, 1.0% by weight of the ultraviolet absorber (2,2'-p-phenylene bis(3,1-benzoxan) was added to the biaxially aligned polyester film.<img file="TW583263B_D0103.tif" />Except for -4-one)), repeat the same operation. The evaluation results of the optical properties of the obtained hard coat film are shown in Table 11.</p><heading level="1">Example 29</heading><p>In Example 10, in addition to the pigment, 1.0% by weight of the ultraviolet absorber (2,2'-p-phenylene bis(3,1-benzoxan) was added to the biaxially aligned polyester film.<img file="TW583263B_D0104.tif" />Except for -4-one)), repeat the same operation. Table 11 shows the evaluation results of the optical properties of the obtained hard film.</p><heading level="1">Example 30</heading><p>In Example 11, in addition to the pigment, 1.0% by weight of the ultraviolet absorber (2,2'-p-phenylene bis(3,1-benzoxan) was added to the biaxially aligned polyester film.<img file="TW583263B_D0105.tif" />Except for -4-one)), repeat the same operation. Table 11 shows the evaluation results of the optical properties of the obtained hard film.</p><heading level="1">Example 31</heading><p>In Example 12, in addition to the pigment, the first ultraviolet absorber (2,2'-p-phenylene bis(3,1-benzoxan) was added to the biaxially aligned polyester film.<img file="TW583263B_D0106.tif" />-4-one)) and the second ultraviolet absorber 2-p-nitrophenyl-3,1-benzox<img file="TW583263B_D0107.tif" />-4-one) except for each of 0.5% by weight and 0.5% by weight, the same operation was repeated. Table 11 shows the evaluation results of the optical properties of the obtained hard film.</p><p><tables><img file="TW583263B_D0108.tif" /></tables></p><p>The following discusses Tables 9 to 11. It can be seen from Table 9 that the biaxially oriented polyester film of the present invention added with the ultraviolet absorber has excellent light deterioration resistance, and the adhesive film and hard film film of the present invention using the film also have the same excellent light deterioration resistance.</p><p>In summary, according to the present invention, a biaxially oriented polyester film, an adhesive film, and a colored hard film film with improved color purity and contrast without reducing the brightness of the display device are provided. In addition, since the adhesive film of the present invention can improve the adhesion to the colored hard film film and reduce the reflectivity of the inner surface, it can provide good surface hardness and abrasion resistance, and has sufficient transparency, anti-glare and Colored hard film with explosion-proof properties. Therefore, the biaxially oriented polyester film, adhesive film and hard film film of the present invention are particularly suitable for use as a surface protection board for personal computer displays. In addition, the optical biaxially oriented polyester film and its adhesive film of the present invention are used for pasting on the image display surface, not only for color-CRT, but also for display devices such as color-LCD and color-EL displays. It is expected to improve color purity and contrast.</p>

Figure 1 is an example of the transmittance curve of the biaxially oriented polyester film for optics of the present invention.

Figure 2 is an example of the transmittance curve of the colored hard coat film of the present invention.

Figure 3 shows the emission spectra of the blue, green, and red phosphors of the phosphor screen of the cathode ray tube.

Figure 4 shows the cross-sectional layer structure along the thickness direction of the colored hard coat film of the present invention.

Figures 5 to 10 are cross-sections along the thickness direction of other colored hard coat films of the present invention, and other layer structures of the colored hard coat film of the present invention.