Molded plastic article having superior polarizing property and its manufacture

[Detailed Description of the Invention]

[Industrial Application] The present invention is a synthetic resin cast excellent in polarizability, and its process. A suitable cast for optical components, such as a polarizing plate with a protective cover for liquid crystal display, such as a calculator, a digital clock, a game machine, porter pull television, a computer display, and an instrument panel for cars, and a glasses lens, can be provided. [Description of the Prior Art] A synthetic resin cast is lightweight, and it is easy to carry out an allocated type, and it has various advantages -- coloring is easy and productivity without rust is high. Especially the transparent synthetic resin cast is liked and used for glasses Lons, a meter cover, a display panel, etc. In recent years, the calculator using a liquid crystal, a digital clock, a day 1. machine, voter full television, the computer display, the instrument panel for cars, etc. are commercialized, or use of a polarizing plate is indispensable in these uses. usually, a polarizing plate -- the extension * film of plastics, such as polyvinyl alcohol, -- an iodine -- special -- dye -- both sides of the polarizing film to which the polarization element was made to stick, A high polymer film (a cellulose system film, a polyester system film, a polycarbonate film) is pasted together, and this is used as a product using the protective cover by the still more transparent synthetic resin cast on the one side. Conventionally, it is manufactured separately and this protective cover and polarizing plate are assembly Had been. Since this method manufactured and assembled the protective cover, there was a problem that there were many part mark and processes. [Means for Solving the Problem] The present invention provides a synthetic resin cast excellent in polarizability with which a polarizing plate and a protective cover were united, and its process. That is, the present invention is the synthetic resin fabrication" article excellent in polarizability with which it comes to unite a protective cover resin layer which carries out injection molding of the transparent thermoplastics material, and a polarizing plate, In a desirable embodiment, the polarizing plate pastes up a polycarbonate resin film on both sides of a polarizing film which make polarization elements, such as an iodine or special dye, come to stick to a plastic film, A kind, with function 1 A 1 of 1 which were chosen from a group which consists of a surface and heart coat, an antifog coat, an anti-dazzle coat, and electrification prevention Cau 1 outside a protective cover are carried out Chinese poem I''5. The process pierces (1) polarizing plate in the same shape as request partial shape of a synthetic resin cast, like Ding* which creates a piece of a punch -- (2) -- the piece of a punch -- the cast public-funds type ' a process with which a cavity part equivalent to a desired part is equipped, and (3) -- shutting the metallic mold and carrying out L person high-pressure ejection of 7 and the Fusion resin at an injection molding means a process of carrying out lamination integral moulding of the fusion resin to this piece of Rush omission, and (4) -- it is a process of a synthetic resin cast excellent in polarizability which consists of a process of including a process of taking out a cast from the metallic mold One side is to bar 1-Cau 1 in a process of creating Strike omission Ha in a desirable embodiment, A process of piercing a plastic film or a sheet which gave a functional tunic more than a kind chosen from a group which consists of an antifog coat, an anti-dazzle coat, and an electrification prevention coat is added, It is a thing which comprises performing simultaneously a process of creating a piece of a punch, and a process with which a cavity part equivalent to a desired part of a synthetic resin molding die is equipped like] plate which the metallic mold closes and to carry out. To both sides (outer layer) of a polarizing film which made polarization elements, such as an iodine and special dye, stick to plastic oriented films, such as polyvinyl alcohol, like the above as a polarizing plate, pasting together a high polymer film (a cellulose system film, a polyester system film, a polycarbonate film), and setting to the present invention -- usually -- thickness -- a thing of 200~500 A is good especially 100~10001 TII. As a plastic film or a sheet which gave a functional tunic more than a kind chosen from a group which one side becomes from a heart coat, an antifog coat, an anti-dazzle coat, and an electrification prevention coat, It is based on a method of applying and hardening a publicly known paint conventionally on a plastic film or a sheet of polycarbonate, polyester, a polycarbonate polyester constituent, an acrylate copolymer, and others in which a transparent punch is possible, etc. In the case of manufacture of a polycarbonate film or a sheet which gave one side a heart coat as a concrete method On a polycarbonate resin film or a sheet with which a molecular weight was manufactured by 25,000, with the extrusion T Di method of A, etc., Acrylate system copolymer solution is applied and dried by methods, such as the wire bar code method, Subsequently, a method of applying a hard court paint of a silicon system and carrying out overheating hardening and a method of applying and carrying out the ultraviolet exposure of the polyfunctional ultraviolet curing type acrylate system heart coat paint, and hardening it, How to apply to a polycarbonate film a method and an anti-dazzle paint which carry out the allocated type of the detailed unevenness to the polycarbonate film surface, and harden them with the roll which in anti-dazzle endowment has unevenness when manufacturing a polycarbonate film or a sheet by the extrusion T Di method, etc., In a similar way, also a fog resistance case and in antistatic property, an antifog paint and an antistatic coating are applied, and they twist them to a method of carrying out drying by heating, etc. As the thermoplastic plastic used for injection molding of the present invention next, They are polycarbonate, polyester, a polycarbonate polyester constituent, an acrylate copolymer, polymethyl methacrylate, polystyrene, cellulose system resin, and other transparent thermoplastics. The thermoplastic plastics used for the plus ranks and injection molding of an outer layer film of a polarizing plate here usually -- a thing of the same kind is preferred from thermal melting arrival nature or an optical homogeneous field -- and As for fusion viscosity of a plus rank of an outer layer film, it is more preferred than a field which prevents model collapse of a film by fusion resin by injection molding or a sheet to use what have a higher molecular weight is higher than fusion viscosity of a thermoplastic plastic used for injection molding, i.e., what. In the case of polycarbonate resin, it is good to use a 25,000 or more-molecular weight thing for an outer layer film of a polarizing plate, and to use molecular weight 15*000~25 and a thing of 000 for injection molding. It is also possible to use what is different in polymer of a thermoplastic plastic film for the outer layers of a polarizing plate, polymer of a film with a functional tunic or a sheet, and polymer that carries out injection molding, In this case, the object of promoting thermal melting arrival with thermoplastics which carries out injection molding and resin by which injection molding is carried out, It is a method for the object that an outer layer film prevents carrying out heat fusion and causing model collapse etc. in which it is also more preferred than that of the same kind as a primer coat, for example, molding resin, to give paints -, such as what makes the amount thing of polymers the main ingredients, heat, and an ultraviolet curing type, to an opposite side of a polarizability coat. It is also possible to add dyes and pigments, an ultraviolet ray absorbent, an infrared resonance agent, etc. to an outer layer film of a polarizing plate or a plastic for injection molding, and to endow special performance with it. Below, the 1st page is used and explained in order to make an understanding of the present invention easy. Drawing 1 is an example of a perspective view of a synthetic resin cast of a game machine fabricated based on the present invention, and Drawing 2 is a sectional view in A-A of Drawing 1. polarizing plate 5 which 3 figures are enlarged drawings of the B section of Drawing 2, and was shown in Drawing 4, and film 5 with a functional tunic -- " -- it is unified by resin layer 6 formed of injection molding. Drawing 4 is a mimetic diagram explaining composition of a polarizing plate, and cover film 42 of a plastic pastes it up on both sides of polarizing film 41 by which a polarization base film consisting of oriented films, such as polyvinyl alcohol, was adsorbed in polarization elements, such as an iodine, via an adhesion layer. Fixation in metallic mold cavities, such as a plastic film of functional tunic formation or sheet 5', can be performed on polarizing plate 5 and one side simple here by power of absorption, such as static electricity or a vacuum, and other conventionally publicly known methods. As mentioned above, it is although a drawing explained, A form of a synthetic resin cast of the present invention is not limited to a drawing, various forms can be taken, and it is one of the desirable modes of the present invention by a form or a design as a cast a frame, an attachment part, or to take and to carry out integral moulding of the functional division of a One LJ implement and others, etc. [Example] Hereinafter, an example explains. Example-1 The iodine was made to stick to a 50-micrometer-thick extension polyvinyl alcohol film, the 75-micrometer-thick polycarbonate film was pasted up on the both sides, and the Like polarizing plate shown in Drawing 4 was obtained. The game machine cover which showed this polarizing plate in Drawing 1 (a liquid crystal display section, the hippo part by which surface lusterless processing was carried out) the hippo with a hole and the attachment parts to a main part of a liquid crystal display section part (transparent window section) -- it pierced identically to shape, the undersurface part of the 1st figure-like metallic mold was equipped, and, subsequently injection molding of the polycarbonate resin of 1. molecular weight 23,000 was carried out. The polarizing plate and the forming resin material part unified the obtained cast completely, and the boundary line was not identified, and the member cracks (degradation of polarizability, the abnormalities in appearance, etc.) of the polarizing plate were not accepted. Example-2 Acrylic Blymer =1-A was applied to the polycarbonate resin film of molecule m 30.(too, thickness 2001) n+ by which extrusion fabrication was carried out by wire bar code ? The past, and it dried. Subsequently, silicon system topcoat was applied by the wire bar code method on the primer, 130 degreeC1 time hardening was carried out, and the hard court film was obtained. The polarizing plate used by example-1 and the above-mentioned hard court film were pierced like example-1, it ranked next, and the bottom of a 1st figure-like metallic mold and a top were equipped with this, respectively, and it ranked next and carried out injection molding of the polycarbonate resin of molecular weight 23,000. The polarizing plate, the hard court film, and the forming resin material part unified the obtained cast completely, and the boundary line was not identified, and the damages to a polarizing plate (degradation of polarizability, the abnormalities in appearance, etc.), damage to a hard court film, and the abnormalities in appearance were not accepted. [Function and Effect of the Invention] The calculator, digital clock with which the present invention was excellent in polarizability and economical efficiency like the above, The suitable cast for optical components, such as a polarizing plate with a protective cover for liquid crystal display, such as a dame machine, porter pull television, a computer display, and an instrument panel for cars, and a glasses lens, can be provided. Since the protective cover and polarizing plate of (1) synthetic-resin cast are unified, the process of the synthetic resin cast excellent in the polarizability of the present invention has the advantage that part mark and a process are skipped. (2) Since a functional tunic is given to one side as a polarizing plate and its protective cover and a polycarbonate resin film or a sheet is made to thermal-melting-arrival-unite with a fusion resin layer within an injection mold, The synthetic resin cast of polarizability with a protective cover which had a desired surface property without passing through a special painting process is obtained, it excels in productivity and poor generating which is easy to generate in a painting process is lost. Such is shown.

[Brief Description of the Drawings]

Drawing 1 -- the perspective view of the game machine cast of an example of the present invention, and Drawing 2 -- the A-A sectional view of Drawing 1, and Drawing 3 -- the -- two is taken and the elements on larger scale of B portion of 1 and Drawing 4 are structure illustrations of a polarizing plate. the number in a figure -- each, 1:cast, 2 varnish blue, 3:runner, 4:Kate, 5:polarizing plate, and 5 -- the fusion resin layer 7.7':metallic mold by *:one side hard court film and 6:injection molding is shown.