Adhesive articles with improved air egress and methods of making the same
Abstract
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Term
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Expired 23 April 2021, 5.4 years ago.
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27 claims: 2 independent, 25 dependent
- 1接着物を作製する方法であって、前記方法は、 熱を加えると柔らかくなる層と、剥離面と、背面とを含む剥離ライナを提供する工程と、 非接着性インクのパターンを前記剥離ライナの前記剥離面にプリントする工程と、 上面を有する 非接着性インクを前記剥離ライナに埋め込 み、前記非接着性インクの前記上面を、前記剥離ライナの前記剥離面の面と同一平面にあるか、下にあり、前記接着剤と接触するものとする 工程と、 前面および背面と終端部とを有する接着層を前記剥離ライナ上に移動させる工程であって、前記接着層の前記前面は前記剥離ライナの前記剥離面に接着されている、工程と、 端面材料を前記接着層の前記背面に付与する工程と を包含する、方法。
- 2前記インクのパターンは複数の点、線、またはそれらの組み合わせを含む、請求項1に記載の方法。
- 3前記インクのパターンは複数の近い状態で間隔の空けられた平行な線含む、請求項1に記載の方法。
- 4前記プリントする工程はフレキソ印刷することを含む、請求項1に記載の方法。
- 5前記プリントする工程はグラビア印刷することを含む、請求項1に記載の方法。
- 6前記プリントする工程はレーザ印刷することを含む、請求項1に記載の方法。
- 7前記剥離ライナの前記剥離面は50より大きいシェフィールド粗さを有する、請求項1に記載の方法。
- 8前記剥離ライナの前記剥離面は艶消し加工を有する、請求項1に記載の方法。
- 9前記剥離ライナはパターン化された剥離面を有する、請求項1に記載の方法。
- 10前記プリントする工程と前記埋め込む工程とは同時に行われる、請求項1に記載の方法。
- 11前記埋め込む工程は、熱および圧力をテクスチャードローラで前記非接着性インクおよび前記剥離ライナに付与する工程を包含する、請求項1に記載の方法。
- 12前記非接着性インクは印刷インクを含む、請求項1に記載の方法。
- 13前記非接着性インクはUV硬化インクを含む、請求項1に記載の方法。
- 14前記非接着性インクは凝集インクを含む、請求項1に記載の方法。
- 15前記非接着性インクは多孔質非接着性インクを含む、請求項1に記載の方法。
- 16前記多孔質非接着性インクはエラストマーを含む、請求項15に記載の方法。
- 17前記埋め込む工程は、熱および圧力を表面に切り込みの入ったパターンを有するローラまたはプラテンを用いて前記非接着性インクおよび前記剥離ライナに付与することを包含する、請求項1に記載の方法。
- 18前記埋め込む工程の前に、ランダムに分散した非接着性粒子状材料を前記剥離ライナの前記剥離面上に付与することをさらに包含する、請求項1に記載の方法。
- 19非接着性材料の第2のパターンを前記剥離ライナの前記剥離面に付与することであって、前記非接着性材料の第2のパターンは前記非接着性インクの第1のパターンよりも大きな厚さを有する、ことをさらに包含する、請求項1に記載の方法。
- 20前記接着剤は感圧型接着剤である、請求項1に記載の方法。
- 21前記接着剤は熱活性型接着剤である、請求項1に記載の方法。
- 22前記インクのパターンは複数の線を含み、前記線の少なくとも50%は前記接着層の前記終端部と交差する、請求項1に記載の方法。
- 23第2の剥離ライナを前記接着層の前記背面に付与することをさらに包含する、請求項1に記載の方法。
- 24前記剥離ライナの前記背面はその上に剥離コーティングを有する、請求項1に記載の方法。
- 25第2の接着層を前記剥離ライナの前記背面に付与することであって、前記第2の接着層の前面は前記剥離ライナの前記背面と接触する、ことをさらに包含する、請求項24に記載の方法。
- 26端面材料を前記接着層のうちの1つの接着層の背面に付与することをさらに包含する、請求項25に記載の方法。
- 27前記第2の接着層はその背面に接着した端面材料を有する、請求項25に記載の方法。
Independent claims27
1 paragraph, as filed
[0001] This application claims the priority of Provisional Application No. 60 / 199,244 filed on April 24, 2000. [0002] (Technical field of invention) The present invention relates to an adhesive and a method for producing the adhesive. The adhesive can be used for graphic images such as those applied to the surface of a vehicle. [0003] (Background of invention) Pressure-sensitive adhesives have been well accepted because of their convenience of use. Pressure sensitive adhesives are often used for tapes and articles containing graphic images. The advantages of pressure sensitive adhesives are their tightness and ease of application. One drawback of these products is the initial viscous strength of the pressure sensitive adhesive. Product positioning needs to be accurate due to the strong initial bond of the adhesive. The product must be manufactured using a pressure sensitive adhesive that can be repositioned (ie, the product can be removed without damaging the product or substrate by lightly applying pressure to the product). It also needs to be possible to stagger the products. The ability to stagger allows the product to be accurately aligned without the need to completely remove the product and, perhaps, with as little damage to the adhesive or substrate as possible. [0004] If the product is a graphic image and is placed on an area such as a wall or track panel, air may be trapped under the product and form bubbles or wrinkles. The product must exhibit the ability of the product to provide a route to degas, that is, to eliminate the air trapped under the product. [0005] A product with one or more of the desired properties of being degassable, repositionable and misalignable is needed. [0006] (Gist of the invention) The present invention relates to an adhesive that provides degassing. Degassing is provided by supplying at least one route, such as an area where air flows out from underneath the structure and does not adhere first. The present invention relates to an adhesive including an end face material having front and rear surfaces and a continuous adhesive layer having upper and lower surfaces, the upper surface of the adhesive layer being adhered to the rear surface of the end face material and not. The pattern of the adhesive material is formed so as to be incorporated into the lower surface of the adhesive layer. Here, the non-adhesive provides an air outlet (degassing). The present invention further relates to a method for producing the above-mentioned adhesive. These articles are useful as industrial graphic images and decorative covers and the like. The article offers the possibility of one or more deaeration, repositioning and misalignment. [0007] The method for producing the adhesive of the present invention includes (a) a step of applying a pattern of a non-adhesive material to the release layer of the release liner, and (b) a step of embedding the non-adhesive material in the release layer. The process includes (c) covering the release liner on the release layer with a pressure-sensitive adhesive, and (d) then applying an end face material or a second release liner to the adhesive. [0008] Another embodiment of the method for producing the above-mentioned adhesive of the present invention is one of (a) a release liner having a release covering both sides of a pattern of a non-adhesive material with a release on the other side that is higher than one side. Alternatively, a step of applying the non-adhesive material on both sides, (b) a step of embedding the non-adhesive material on one or both sides of the release liner, (c) a step of covering both sides of the release liner with a pressure-sensitive adhesive, and (d) a first step. An end face material having a front surface and a rear surface is provided to the first adhesive layer together with the front surface of the end face material to be adhered to the outer surface of the first adhesive layer, and the outer surface of the second adhesive layer is adhered to the rear surface of the end face material. Therefore, the step of exposing the above material to the wind is included. The above-mentioned embedding step and giving step may be combined. This embodiment is known as a double adhesive tape. [0009] (Explanation of preferred embodiments) As mentioned above, the present invention relates to adhesives such as those used in industrial graphics. The adhesive provides the possibility of one or more degassing, repositioning and misalignment so that it can be easily applied to the substrate. [0010] Adhesives include facestock, continuous adhesive layers, and non-adhesive materials. The adhesive may further include a release liner that is removably adhered to the adhesive layer. In one embodiment, the non-adhesive material is a non-adhesive material comprising a non-adhesive polymer, including an ink composition imparted by the printing method. In another embodiment, the non-adhesive material is applied by vacuum metallization or sputtering. After drying, cooling, and / or curing, the non-adhesive material adheres to the top or bottom surface of the adhesive layer. In one embodiment, the non-adhesive composition comprises more than 50%, 75% or 85% solids. In another embodiment, the non-adhesive composition is 100% solid. [0011] In one embodiment, given that the non-adhesive material is not sticky during drying, cooling, and / or curing, the non-adhesive material is any material that can be used as an ink on a printing machine. obtain. The non-adhesive material can be made of an organic polymer material such as polyurethane, polyvinyl chloride, acrylic polymer, acetate, polyethylene, polypropylene or polystyrene. [0012] In one embodiment, the non-adhesive composition is a UV curable ink. The UV curable inks useful in the present invention typically include a binder containing one or more photopolymerizable monomers. Photopolymerizable monomers are usually ethylenically unsaturated compounds. Unsaturated compounds can contain one or more olefin double bonds. The unsaturated compound can be a low molecular weight compound (monomer) or a high molecular weight compound (oligomer). Examples of monomers containing one double bond are acrylates such as alkyl (meth) acrylates, or methyl-, ethyl-, butyl-, 2-ethylhexyl-, or 2-hydroxyethyl acrylates, isobornyl acrylates, methyl-. , Or a hydroxyalkyl (meth) acrylate such as ethyl methacrylate. Further examples of photopolymerizable monomers include acrylonitrile, acrylamide, methacrylamide, vinyl esters such as N-substituted (meth) acrylamide, vinyl acetate, vinyl ethers such as isobutyl vinyl ether, styrene, alkyl styrene and halostyrene, N-vinylpyrrolidone, Vinyl chloride or vinylidene chloride. [0013] Monomers containing multiple double bonds are usually ethylene glycol diacrylates, 1,3-propylene glycol, 1,4-butandione, 1,4-cyclohexanedione, neopentyl glycol, hexamethylene glycol, or trimethyl propantri. Acrylate and bisphenol A polyacrylates such as pentaerythritol triacrylate or pentaerythritol tetraacrylate, vinyl acrylate, divinylbenzene, divinyl succinate, diallyl phthalate, triallyl phosphate, triallyl isocyanurate or tris (2-acryloyloxy) ethyl- Isocyanurate. [0014] Typical examples of high molecular weight (oligomer) polyunsaturated compounds are acrylate epoxy resins, acrylate polyethers, acrylate polyurethanes or acrylate polyesters. Further examples of unsaturated oligomers are unsaturated polyester resins usually made from maleic acid, phthalic acid and one or more dienes and having a molecular weight of about 500 to about 3000. Such unsaturated oligomers may also be referred to as prepolymers. A single component system based on a light-curable prepolymer is often used as a binder for printing inks. Unsaturated polyester resins are typically used in two component systems, with monounsaturated monomers as described above, preferably with styrene. [0015] Unsaturated compounds can also be used in mixtures with non-photopolymerizable film-forming components. These constituents can usually be dry polymers in organic solvents or solutions thereof, such as nitrocellulose. However, these constituent materials can further be chemically curable resins such as polyisocyanate resins, polyepoxide resins or melamine resins, or thermally curable resins. The incidental use of thermally curable resins is important when used in so-called hybrid systems. The hybrid system is photopolymerized in the first step and then crosslinked by heat in the second step after this treatment. [0016] The UV radiation curable ink further comprises at least one photoinitiator. A wide range of different photopolymerization initiators are currently available for UV radiation curing systems. These photopolymerization initiators include benzophenone and benzophenone derivatives, benzoin ethers, benzyl ketal, dialkoxyacetophenone, hydroxyacetophenone, aminoacetophenone, haloacetophenone or acryloxyphosphine oxides. They differ in that they differ in maximum absorption rate. Mixtures of two or more photopolymerization initiators can be used to cover a wide absorption range. The total amount of photopolymerization initiator in a curable composition by UV radiation can range from about 0.05% to about 7% or 10% of the total weight of the composition. Preferably, the composition comprises from about 0.2% to 5% by weight of the photopolymerization initiator. [0017] Amines can be added to promote photopolymerization of, for example, triethanolamine, N-methyl-diethanolamine, p-dimethylaminobenzoate or Michler's ketone. Photopolymerization can be further promoted by adding a photosensitizer that alters or widens the spectral sensitivity. These photosensitizers are preferably aromatic carbonyl compounds such as thioxanthone, anthraquinone and 3-acyl-coumarin derivatives, and 3- (aroylmethylene) -thiazolin. [0018] A hindered amine light stabilizer (HALS), which acts as a co-stabilizer, can also be added to the UV radiation curable print composition used in the present invention. Examples of hindered amine light stabilizers include hindered amine light stabilizers listed and cited in US Pat. Nos. 5,112,890 and 4,636,408. This document is incorporated herein by reference. A specific example of a hindered amine light stabilizer useful in printing inks is Tinuvin292, which is identified as bis (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate. [0019] In addition to the binder materials and photopolymerization initiators described above, the UV radiation curable inks used in the present invention are further selected from organic pigments, inorganic pigments, body pigments and dyes known and used in the art. Colorants that have been used may also be included. Examples of useful pigments include titanium dioxide, cadmium yellow, cadmium red, cadmium maroon, iron oxide, carbon black, chrome green, gold, silver, aluminum and copper. Examples of dyes include alizarin red, Prussian blue, auramin naphthol, malachite green and the like. Generally, the concentration of the pigment or dye in the ink is from about 0% to about 70% by weight and, in one embodiment, from about 0.1% to about 50% by weight. [0020] In addition to the colorants described above, the UV radiation curable inks used in the present invention may further include fillers, extenders and surfactants. These are known and have been used in the art. Examples of useful fillers and extenders include silicon dioxide, fumed silica, glass or ceramic microspheres, and glass or ceramic bubbles. Generally, the concentration of filler or extender is from about 0% to about 70% by weight and, in one embodiment, from about 0.5% to about 50% by weight. [0021] [0021] The printing ink may also include at least one UV absorber that provides weathering protection and helps prevent microcracks. The amount of UV absorbers contained in the ink curable by UV radiation needs to be kept substantially minimal, as the presence of UV absorbers can increase the cure rate. Various UV absorbers are known and useful in the present invention. These UV absorbers include photopolymerizable hydroxybenzophenones and UV absorbers belonging to the group of photopolymerizable benzotriazoles. U.S. Pat. No. 5,369,140 describes a class of 2-hydroxyphenyl-s-triazines that are useful as UV absorbers for radiation-curable systems. Triazine is effective in stabilizing the cured membrane when exposed to direct sunlight for extended periods of time. These stabilizers do not interfere with the UV radiation of the ink. Triazine UV absorbers are effective when the amount is about 0.1 to about 2% by weight. The UV absorber may be used in combination with other photopolymerization stabilizers such as sterically hindered amines. With respect to the disclosure of such combinations of UV absorbers, the disclosure of the '140 patent is incorporated herein by reference. U.S. Pat. Nos. 5,559,163 and 5,162,390 also describe UV absorbers useful for the inks of the present invention. [0022] Examples of useful UV curable inks include UV curable inks available from Decochem under the trade name Poly-Rad Plastics and UV curable inks available from Acheson and Daw Chemical Company. [0023] In one embodiment of the invention, the ink used to form the non-adhesive material on the adhesive layer is a coalescing ink. The ink is not efficiently immersed in water on the surface of the release liner, and the area of the ink is small and aggregated to increase the height. Therefore, depending on the degree of agglomeration, the lines of printing ink can form narrower lines, or lines made of ink that look like small irregular balls, or combinations, all of which increase in height. To do. Narrower lines, smaller balls, or combinations are then embedded in the release liner. The thickness of the ink applied to the surface of the adhesive layer can also affect the degree of agglomeration. Surfactants can also be added to the ink composition to control the degree of aggregation. [0024] In one embodiment of the invention, the ink used to form the non-adhesive material comprises a porous non-adhesive. The porous non-adhesive may have the properties of an elastomer so that when compressed, it substantially returns to its original shape. For example, the porous non-adhesive includes an ink containing a foaming agent that expands the ink to form open or closed cells, or a combination thereof. The foaming agent is activated, for example, by applying heat to the ink. Other examples of porous non-adhesives include suspensions in which gases and / or particles are in the binder. The porous non-adhesive is then embedded in the release liner. The porous non-adhesive fills the dents created during the embedding process. As a result, the end face material layer has a smooth appearance. [0025] Non-adhesive materials are generally patterned. The pattern can be any geometry that provides a path to degas from multiple points, lines or glue. With wires, at least 50% of the pattern extends to the edges of the adhesive for proper degassing. Lines and points can vary in size if degassing is maintained. Lines and other patterns typically have an average thickness of about 0.3μ to about 100μ, or about 0.5μ to about 50μ, or about 2μ to about 20μ. The width of the line can also vary widely. Examples of useful range of line widths are from about 12μ to about 250μ, from about 25μ to about 125μ, or from about 50μ to about 75μ. The pattern can be a grid of intersecting lines, a texture, a waffle pattern, diagonal straight lines and curves, for example, geometric shapes arranged like tiles such as hexagons, rectangles, overlapping circles or triangles, or It can be a line with a cross-hatch pattern. For example, a combination of patterns can be used as a grid of lines that intersect irregular or patterned points. The non-adhesive material can be applied by any means. [0026] In one embodiment, the non-adhesive material is an ink containing a UV curable polymer composition, such as a UV curable acrylic or polyurethane composition. After addition, the ink is cured by irradiation in a UV exposure apparatus, as is well known to those skilled in the art of printing and UV curing. UV light sources such as low pressure mercury lamps, high pressure mercury lamps, xenon lamps, arc lamps and gallium lamps are useful. It is possible, but not always necessary, to improve the curing of the ink by heating after irradiation. [0027] In one embodiment, the non-adhesive material is any suitable printing technique such as screen printing, roller coating printing, flexographic printing, lithography printing, gravure printing, laser printing, inkjet printing, brushing, spraying, dipping or coating. It is a polymer composition that can be printed by. The type of printing can be any type that can be printed on the release liner. One particularly useful printing method is a modification of flexographic printing that provides both printing and embedding of non-adhesive materials. [0028] In one embodiment, the non-adhesive layer is a printing ink having a thickness of about 0.3 microns to about 100 microns, about 0.5 microns to about 50 microns, or about 2 microns to about 20 microns. Non-adhesive materials can also be applied to the release liner by patterned vacuum metallization or sputtering. In this embodiment, the non-adhesive layer is typically from about 30 nanometers to about 3000 nanometers, from about 100 nanometers to about 2000 nanometers, or from about 300 nanometers to about 1500 nanometers. [0029] As mentioned above, the adhesive has an end face material, an adhesive layer, a plurality of non-adhesive materials, and optionally, this configuration has a release liner. The end face material can be applied to an adhesive layer that is already detachably adhered to the release liner. Instead, both the end face material and the adhesive layer can be applied to the release liner. The end face material can be any adhesive useful for decorative or graphic image applications. The end face material is typically about 10 to about 300 microns thick and about 25 to about 125 microns thick. End face materials are paper, polyolefin (straight or branched), polyamide, polystyrene, nylon, polyester, polyester copolymer, polyurethane, polysulfone, polyvinyl chloride, styrene maleic anhydride copolymer, styrene acrylonitrile copolymer, sodium ethylene methacrylate. Alternatively, it includes zinc salt-based ionomers, polymethylmethacrylates, cellulose derivatives, fluororesins, acrylic polymers and copolymers, polycarbonates, polyacrylonitriles, and ethylene vinyl acetate copolymers. Included in this group are acrylates such as ethylene methacrylic acid, methyl ethylene acrylate, ethylene acrylic acid, and ethyl ethylene acrylate. Further included in this group are polymers and copolymers of olefin monomers having, for example, 2 to about 12 carbon atoms and, in one embodiment, 2 to about 8 carbon atoms. .. These include polymers of alpha olefins with 2 to about 4 carbon atoms per molecule. These include polyethylene, polypropylene, poly-1-butene and the like. An example of a copolymer within the above definition is a copolymer of ethylene and 1-butene in which about 1 to about 10 weight percent of 1-butene comonomer is incorporated into the copolymer molecule. Useful polyethylene has a variety of densities, including low density, medium density, and high density ranges. The low density range is about 0.<sup>3</sup>The medium density range is from about 0.925 to about 0.940 g / cm.<sup>3</sup>The high density range is from about 0.94 to about 0.965 g / cm.<sup>3</sup>Is. Membranes made from copolymer mixtures or copolymers and homopolymers are also useful. The membrane can be extruded and formed as a single-layer or multi-layer membrane. [0030] In one embodiment, the first end face material is a polymeric end face material containing a transitional additive. The end face material is preferably a polyvinyl chloride end face material. Additives include plasticizers and antioxidants. The plasticizer is a high boiling solvent or softener and is usually a liquid. Plasticizers are esters made of anhydrides or acids, and usually suitable alcohols with 6 to 13 carbon atoms. The plasticizer can be adipate, phosphoric acid, benzoic acid or phthalates, polyalkylene oxides, sulfonamides and the like. Plasticizers are DOA plasticizer (dioctyl adipate) and TEG-EH plasticizer (triethylene glycol). Di-2-ethylhexanate), TOTM plasticizer (trioctyl remeritate), triacetin plasticizer (glyceryltriacetate), TXIB plasticizer (2,2,4-trimethyl-1,3-pentanediendiisobuti) Rate), DEP plasticizer (diethylphthalate), DOTP plasticizer (dioctyl terephthalate), DMP plasticizer (dimethyl phthalate), DOP plasticizer (dioctyl phthalate), DBP plasticizer (dibutyl phthalate), polyethylene oxide, toluene sulfanylamide , And dipropylene glycol benzoic acid and the like. [0031] The adhesive has a continuous adhesive layer (usually a pressure sensitive adhesive layer). In some applications, the adhesive can be a heat activated adhesive, which is distinct from pressure sensitive adhesives. The adhesive layer typically has a thickness of about 10 microns to about 125 microns, or about 25 microns to about 75 microns, or about 10 microns to about 50 microns. In one embodiment, the coating weight of the pressure sensitive adhesive is in the range of about 10 to about 50 grams per square meter (gsm), and in one embodiment it is in the range of about 20 to about 35 gsm. The pressure sensitive adhesive can be any pressure sensitive adhesive known in the art. These include rubber-based adhesives, acrylic adhesives, vinyl ether adhesives, silicone adhesives, and mixtures of two or more of these. Includes "Adhesion and Bonding", Encyclopedia of Polymer Science and Engineering, Vol.1 (pp. 476-546) Interscience A pressure-sensitive adhesive material described in Publishers, 2nd Edition, 1985. The disclosure of this document is incorporated herein by reference. Useful pressure-sensitive adhesive materials include acrylic type polymers, block copolymers, natural rubbers, recycled rubbers, or styrene butadiene rubbers, adhesive natural or synthetic rubbers, and irregular copolymers of ethylene and vinyl acetate, as the main constituents. It may include adhesive polymers such as ethylene-vinyl-acrylic terpolymer, polyisobutylene, poly (vinyl ether). Pressure-sensitive adhesive materials typically feature a glass transition temperature in the range of about -70 ° C to about 10 ° C. [0032] In addition to the above resins, other materials may be included in the pressure sensitive adhesive material. These include solid adhesive resins, liquid tackifiers (often also called plasticizers), antioxidants, fillers, pigments, waxes and the like. The adhesive material may include a mixture of a solid adhesive resin and a liquid adhesive resin (or a liquid plasticizer). Particularly useful backing agents are described in US Pat. Nos. 5,192,612 and 5,346,766. This document is incorporated herein by reference. [0033] Pressure sensitive adhesives include curtain coating, gravure coating, reverse gravure coating, offset gravure coating, roller coating, brushing, knife overroller coating, air knife coating metering rod coating, reverse roller coating, doctor. It can be applied using standard coating techniques such as knife coating, dipping, die coating and spraying. The application of these coating techniques is well known in the industry and can be effectively implemented by those skilled in the art. Knowledge and expertise in the manufacturing equipment for coating determines the preferred method. Further information on coating methods can be found in "Modern Coating and Drying Technology" by Edward Cohen and Edgar Gutoff, VCH Publishers, Inc. (1992). [0034] The release liner used in the present invention may be known in the art. Usually, a useful release liner is a paper coated with polyethylene using a commercially available silicon release coating, a polyethylene terephthalate film coated with polyethylene using a commercially available silicon release coating, or while producing such a film. Cast polypropylene film, which can be embossed with a pattern (s) and then coated with a commercially available silicone release coating. film) is included. A suitable release liner is kraft paper with a silicone release coating, the front surface coated with low density polyethylene and the back surface coated with high density polyethylene. Other release liners known in the art are also suitable for the pressure sensitive adhesive selected for use in the present invention, as long as they are selected in terms of their release characteristics. In one embodiment of the invention, the release liner has a formable layer of polymer under a release coating. The possible layer of polymer softens with heat, allowing non-adhesives to be embedded in the release liner. Embedding a non-adhesive material in the release liner maintains the three-dimensional stability of the printed pattern and protects the pattern during handling, storage and transportation of the adhesive. Non-adhesive material The moldable layer is usually a polyolefin such as polyethylene or polypropylene. The release layer surface of the release liner can have an embossed finish, a smooth finish, or a patterned finish. The release layer may have an irregularly microstructured surface, such as a matte finish, or may have a three-dimensional microstructured pattern. The microstructure can have a cross section made of a circle, an ellipse, a diamond, a square, a rectangle, a triangle, a polygon, a line or an irregular shape when the cross section is taken parallel to the surface of the peeled surface. The release liner also has an irregularly distributed non-adhesive particle material applied to the surface of the release liner. The non-adhesive particles are then embedded in the release liner along with the patterned non-adhesive material. [0035] In one embodiment, the release liner has a release coating on both sides, one with a release coating having a higher release value than the other release coating. [0036] In one embodiment, the adhesive layer of the article has a shefield roughness of at least about 10, or at least about 75, or at least about 150. The adhesive layer has its own roughness and the adhesive layer can be formed when the adhesive is coated on the release liner. It should be understood that the release liner can have a sheerfield roughness of at least about 10, or at least about 50, or at least about 75 or at least about 150. The adhesive duplicates the complementary texture or pattern of the release liner. Alternatively, the release liner can be considerably coarser depending on the composition of the adhesive. Sheffield roughness is determined by TAPPI T538 om-88. [0037] Applicants have found that the addition of a non-adhesive material on the adhesive layer improves degassing. The non-adhesive material provides an air outlet along the interface. This is especially true for the small bubbles that form as a natural result of placing sticky structures on the substrate. Even when properly applied, small bubbles are still formed. The air in these bubbles needs a route to escape. The interface between the non-adhesive material and the substrate is the area where this occurs. If the non-adhesive material extends beyond the adhesive layer, the non-adhesive material provides repositioning and / or misalignment and deaeration. This is especially advantageous when the adhesive is applied to a surface above room temperature. The amount of non-adhesive material extending below the adhesive layer may be sufficient to prevent the adhesive layer from coming into contact with the substrate. [0038] The present invention is further described by reference to the figures. FIG. 1a shows a cross-sectional view of the adhesive 10. The adhesive 10 comprises an end face material 11 that is a paper or polymer film (eg, vinyl (PVC) or polyester film). These materials are commonly referred to as end face materials. The end face material is selected for the desired properties required by the adhesive. For example, when an adhesive is used as a medium, as a result, vinyl end face materials are also generally selected for flexibility and durability. Polyurethane end face materials can also be used for applications exposed to wind and rain. The end face material can be multi-layered with layers selected for weather resistance, printability and the like. The end face material 11 has an adhesive relationship with the adhesive tape material 12. The adhesive 12 is in an adhesive state with the non-adhesive material 13. The non-adhesive material can partially spread into the adhesive layer (but part). It is generally understood that most of the non-adhesive material extends beyond the surface of the adhesive layer. The non-adhesive material exists in the form of the pattern described above. An example of a particular useful pattern is a series of intersections of grid patterns that form a diamond shape. [0039] In another embodiment, the adhesive where the adhesive 10 has additional elements of the release liner 14 is represented by FIG. 1b. The non-adhesive material 13 is embedded in the release liner. The non-adhesive material 13 has an adhesive relationship with the adhesive layer 12. [0040] Referring to FIG. 2a, the adhesive 20 has an end face material 21 that is in an adhesive relationship with the adhesive layer 22. The outer surface of the adhesive layer 23 is in contact with a thin layer of textured non-adhesive material 24. There is a texture on the outer surface of the adhesive layer 23. The texture can be a random pattern, such as a matte finish. This texture is applied to the adhesive and non-adhesive materials using a textured release liner, for example a matte finish release liner. In FIG. 2b, the adhesive has additional elements of a textured release liner 25. The non-adhesive material 24 is embedded in the release liner. The surface of the textured release liner is in an adhesive relationship with the adhesive layer 22 having a complementary textured surface 23. The adhesive layer 22 is in an adhesive relationship with the non-adhesive material 24 having a texture. The adhesive layer 22 further has an end face material 21 that has an adhesive relationship with the adhesive layer 22. [0041] In another embodiment, shown in FIG. 3, the repositionable and slidable feature of the adhesive 30 with improved air outlets simultaneously prints a pattern of non-adhesive regions 33 into the surface of the liner 34. Provided by embedding. The liner 34 includes a moldable layer underneath the silicone strip. The pattern (eg, diamond mold, smoldered pattern, or a combination thereof) is printed on the peeling surface of the polycoated peeling liner 34 with a non-adhesive. The non-adhesive has greater adhesiveness than the release liner to a well-applied adhesive. The pattern can be added to the peeled surface by hot melt flexographic printing. When the pattern is printed, the combination of heat and pressure provided by the raised portion of the flexographic printing roll and the heat from the printing ink presses the moldable layer below the silicone release layer and onto the liner. Ink is embedded. Other applicable techniques use conventional flexographic printing in combination with hot stamping and heated backing rolls. The liner 34 is then coated with an adhesive 32 and transferred to an end face material 31 such as molded vinyl or extruded vinyl. The release liner 34 is then removed, exposing a raised non-adhesive pattern of the non-adhesive material 33 on the surface of the adhesive 32, as shown in FIG. 3b. [0042] In one embodiment of the invention, an adhesive is made by placing a non-adhesive material on a strip that covers the strip liner. The non-adhesive material can be completely or partially embedded in the release liner. The embedding step can be performed using pressure and / or heated rollers or platen. As a result, the non-adhesive material is press-fitted into the release liner. Note that the release liner has a moldable layer of polymer underneath the release coating. This moldable layer is softened by the use of heat, which allows the non-adhesive material to be embedded in the liner. The moldable layer is generally a polyolefin such as polyethylene. [0043] The embedding temperature to be embedded in the release liner is typically in the range of about 150 ° F to 300 ° F, or about 200 ° F to 250 ° F, but depends on the material used. The implantation temperature also depends on the material and is typically about 25 pounds per square inch (psi) to 150 psi, or about 50 psi to 100 psi. [0044] 4a-4c show an embodiment of the embedding process. The embedding process uses a peel liner with a moldable layer beneath the peel surface. In one embodiment, the molded layer is composed of polyolefin (eg, low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, or a mixture thereof). Generally, the molded layer has a thickness of 10 μm to about 50 μm. [0045] With reference to FIG. 4a, the peel liner 41 is printed in a pattern on the peel liner surface having the non-adhesive material 42. Laminated rollers 43a and 43b pass over the peeling liner. Generally, the peel liner and the lower laminate roller are heated and the upper laminate roller is cooled. The selected material determines the heating and cooling forms in which this material can be used. The laminated rollers can be steel rollers, rubber rollers, or a combination thereof. In one embodiment, when a non-adhesive material is embedded, a texture is imparted. In this embodiment, the rollers have a textured surface, such as a matte finish. The rollers may also have patterned surfaces. Silicone rubber rollers are an example of rollers that can be used to give a texture or pattern. In FIG. 4b, after embedding the non-adhesive material 44, the release liner 41 is coated with an adhesive 45, which is then dried, cooled, and / or cured to allow the end face material 46 to have this structure. Is given to. In FIG. 4c, the end face material 46 and the adhesive layer 45 are separated from the peel liner 41. Due to the peeling properties of the peeling liner, the strength of the adhesive bond of the non-adhesive material 44 to the adhesive layer 45 is greater than the strength of the adhesive bond to the peeling liner 41. Therefore, when the release liner 41 is removed from the adhesive layer 45, the non-adhesive material 44 is adhered to the adhesive layer 45 and removed together with the adhesive layer 45. [0046] In another embodiment, an adhesive with improved degassing, repositioning and slideability properties is densely placed on the liner surface, including a moldable layer beneath the strip. It is provided by printing and embedding a pattern in the adhesive area. A densely arranged pattern of non-adhesive material (eg, parallel diagonals) is printed on the surface of the polycoated strip liner. The pattern of non-adhesive material is embedded in the release liner using heat and pressure. The adhesive is then coated on a release liner with an embedded non-adhesive pattern. The adhesive layer is then applied to a substrate such as vinyl made by mold or extrusion. The densely arranged pattern prevents draping of the adhesive by providing degassing. This embodiment is illustrated in FIG. 5, where the end face material 51 is in contact with the adhesive layer 52 by an adhesive. The adhesive layer 52 is in contact with the non-adhesive material 53 by an adhesive. The pattern of the non-adhesive material 53 is such that the two lines are closely arranged with each other (typically at a distance of 5 μ to about 50 μ or about 12 μ to about 35 μ). A distance of 25μ is especially useful. The tightness of the lines of the non-adhesive material 53 prevents the draping of the adhesive layer between the lines so that an air gap 54 is formed. The air gap supplies degassing. [0047] In another embodiment of the invention, the non-adhesive material is printed on the release layer of the release liner. With heat and pressure, the raised non-adhesive material is embedded in the release liner and the top surface of the non-adhesive material is substantially flat with the surface of the release liner. The embedding roll used to embed the non-adhesive material in the exfoliation liner contains a notch pattern, and when heat and pressure are applied to the printed exfoliation liner, the exfoliation liner is placed in the incised pattern of the embedding roll. Develop the corresponding raised pattern. The notched pattern can be multiple points, multiple lines, or any geometric shape, which provides a path for degassing from the adhesive. The peel liner is then coated with an adhesive and end face material is applied to this structure. When the liner is removed from the adhesive layer, the non-adhesive material provides repositioning and sliding capabilities, and the incised lines of the adhesive provide improved degassing. This embodiment is shown in FIGS. 6a-6c. Referring to FIG. 6a, the peel liner 61 is printed in a pattern on a peel surface having the non-adhesive material 62. Laminating rollers 63a and 63b pass through the peeling liner. Generally, the peeling liner and the lower laminated roller are heated to cool the upper laminated roller. The material selected determines the heating and cooling configurations used. The laminated rollers can be steel rollers, rubber rollers, or a combination thereof. The roller 63a has a pattern cut on the roller surface. Using heat and pressure, the raised non-adhesive material 62 is embedded in the peel liner 61 and the raised pattern 65 is formed on the surface of the peel liner corresponding to the notched pattern on the roller surface of the roller 63a. Will be done. The peel liner 61 is then coated with adhesive 66, as shown in FIG. 6b. After curing of the adhesive 66, end face material 67 is applied to this structure. In FIG. 6c, the end face material 67 and the adhesive layer 66 are separated from the peel liner 61. Due to the peeling properties of the peeling liner, the strength of the adhesive bond of the non-adhesive material to the adhesive layer Is greater than the strength of the adhesive bond of the non-adhesive material to the liner. Therefore, when the liner 61 is removed from the adhesive layer 66, the non-adhesive material 64 is adhered to the adhesive layer 66 and removed together with the adhesive layer 66. [0048] In another embodiment, the adhesive has improved degassing, rearrangement and sliding ability properties provided by printing and embedding the smoothed surface of the pattern in the non-adhesive area into the liner. The smoothed liner contains a moldable layer underneath the release layer. The interconnected pattern of the non-adhesive material is applied to the smoothed peeled surface of the multi-coated peel liner, for example by vacuum metallization or printing. The peeled surface and the non-adhesive material pattern are textured, which pattern is passed through a heated laminate through a patterned liner with a peeled surface that is placed facing the textured rollers. Embedded in the peel liner. The release liner patterned with the embedded non-adhesive material is then coated with an adhesive and laminated to the end face material. Once applied to the substrate, the textured and raised non-adhesive material interconnect pattern prevents the adhesive from first contacting the substrate, providing sliding and rearrangement capabilities. Degassing is enhanced by texture at the interface between the non-adhesive material surface and the substrate surface. This embodiment, shown in FIG. 2a, is described above. [0049] In another embodiment, an adhesive with improved degassing, repositionability, and slideability properties is a structural liner that includes a moldable layer under silicone stripping. Provided by printing and inserting a pattern of non-adhesive material on the surface of the (textured liner). The release surface of the polymer-coated release liner is structured by passing it through a release liner via a heated laminate and pressing the release surface against a structural roller. Alternatively, a commercially available release liner with a matte or structured surface can be used. The interconnection of non-adhesive materials is imparted to the structural peeling surface of the peel liner, for example by vacuum metallization or printing. A pattern of non-adhesive material is then inserted into the release liner. The adhesive is then coated on the printed release liner and then the adhesive is applied to the facestock. Once applied to the substrate, the structured, raised interconnect pattern of the non-adhesive material prevents the initial contact of the adhesive to the substrate, then provides sliding and rearrangement capabilities. To do. The air egress is reinforced by a texture at the interface between the surface of the non-adhesive and the surface of the substrate. This embodiment is similar to the adhesive shown in FIG. 1a, except that the exposed surface of the non-adhesive material is structured. [0050] In another embodiment, the adhesive has an improved outer shape that provides a degassing port, a rearrangement function, and a sliding function. An ultra-thin interconnect pattern of non-adhesive material is applied to the peeled surface of the polymer coated peel liner by vacuum metallization or printing. A thinner pattern of non-adhesive material microdots (with a diameter of about 25 μ to 125 μ) is also applied to the surface of the peel liner. The pattern of non-adhesive material is embedded in the release liner using a heated laminate. The peel liner is then coated with an adhesive and then the adhesive coated peel liner is applied to an end face material such as cast or extruded vinyl. At the same time as the removal of the peeling liner and the application of the adhesive to the substrate, the raised microdot pattern of the non-adhesive material prevents the initial contact of the adhesive with the substrate and provides sliding and rearrangement functions. The degassing port is provided by a combination of non-adhesive material interconnects and microdot patterns. [0051] In another embodiment, the adhesive having a decorative surface texture and providing rearrangement and sliding functions is a decorative pattern of non-adhesive material (ie, tweed, pig bark, grain, child). It is produced by applying (cowhide, etc.) to the peeling surface of the peeling liner. The pattern of non-adhesive material is embedded in the release liner using a heated laminate. The peel liner is then coated with an adhesive. The adhesive-coated release liner is then adhered to an end face material such as cast or extruded vinyl. Embedding a decorative pattern in the peel liner maintains a smooth surface of the end face material of the finished adhesive. As a result, the surface of the end face material becomes more suitable for post decoration by screen printing, flexo printing, lithography printing, gravure printing, laser printing, inkjet printing and the like. At the same time as the removal of the peeling liner and the application of the adhesive to the substrate, the raised decorative pattern of the non-adhesive material prevents the adhesive from contacting the substrate, providing sliding and rearrangement functions. The thickness of the pattern required to provide the decorative texture depends on the thickness and flexibility of the end face material to which the adhesive layer is applied. Having a print thickness that causes distortion of the end face material is to provide the resulting surface texture. [0052] In another embodiment, the adhesive with improved degassing port, rearrangement function, sliding function gives a raised pattern to the moldable layer under peeling and at the same time a random pattern or non-random pattern of non-adhesive regions. Is provided by embedding in the surface of the liner. A pattern of microdots of non-adhesive material (with a diameter of about 25μ to 125μ) is printed on the surface of the polymer coated peel liner. Alternatively, a random pattern of non-adhesive fine particles such as glass beads can be imparted to the surface of the release liner. Using heat and pressure, the raised print or glass beads are pushed into a moldable layer under the silicone release layer of the release liner, which causes the top surface of the non-adhesive material of the print or glass beads to be with the release layer. They are placed on almost the same surface. This is accomplished using embedding rolls with diamond-shaped or diagonal patterns. The resulting peel liner includes embedded print or glass beads and a raised line pattern. The peel liner is then coated with an adhesive and transferred to the end face material. Upon removal of the peel liner, the raised non-adhesive areas of the printed or glass beads and the carved lines on the surface of the adhesive are exposed. The raised print or glass beads provide repositioning and sliding functions, and the carved lines provide an improved degassing port. Non-adhesive particles can be made of organic and inorganic particles including, but not limited to, polymers, ceramics and metals, in addition to glass. The non-adhesive microparticles are spherical, cubic, irregularly shaped, solid, porous, recessed and can be elastic or inelastic. [0053] In another embodiment, the adhesive having the properties of degassing port, rearrangement function and sliding function is such that the ink aggregates or retracts into very small droplets or fine lines and the height of the small droplets or fine lines. It is provided by surface printing non-adhesive microdots, lines or combinations thereof on the liner with an increasing number of printing materials. A pattern of non-adhesive material is printed on the surface of the release liner. The non-adhesive material aggregates or retracts into very small droplets or fine lines, increasing the height of the very small droplets or fine lines. Using heat and pressure, the non-adhesive material is embedded in the release liner so that the top of the non-adhesive material is provided on a plane approximately identical to the silicone release layer. The adhesive is applied beyond the peel liner. The adhesive-coated release liner is then transferred to the end face material. Removing the peel liner exposes the non-adhesive areas of the print. When applied to the substrate, the small, raised droplets provide air spacing between the droplets to improve the function of the deaerator. Small raised droplets of non-adhesive material also provide repositioning and sliding functions. [0054] Another embodiment of the method of making an adhesive of the present invention includes the following steps. (a) Step of applying the pattern of the non-adhesive material to the peeling liner; (b) Step of embedding the non-adhesive material in the peeling liner; (c) Coating the pressure sensitive adhesive on the peeling layer of the peeling liner. Steps; (d) The step of imparting additional peeling liners to the adhesive layer with higher or lower peeling. Further stripping liners may be omitted if the first stripping liner has stripping means on both surfaces of the first stripping liner. In this case, a pattern of non-adhesive material can be applied and embedded on the peeled surface of one or both of the first peel liners. The above embodiments are well known as transfer adhesives or adhesive sandwiches. [0055] Another embodiment of the method of making an adhesive of the present invention includes the following steps. (a) The step of imparting a pattern of non-adhesive material on one or both sides of a peel liner with a peel coating on both sides where the peeling on one side is higher than the peeling on the other side; b) The step of embedding a non-adhesive material on one or both sides of the peel liner; (c) The step of coating pressure sensitive adhesive on both sides of the peel liner; (d) Front and back surfaces This is a step of imparting the end face material to the first adhesive layer, adhering the front surface of the end face material to the outer surface of the first adhesive layer, and winding the material, thereby forming a second adhesive layer. The process in which the outer surface is in contact with and adhered to the rear surface of the end face material. The embedding process and the placement process can be combined. This embodiment is well known as a double-sided adhesive tape. [0056] Although the present invention has been described in the context of its preferred embodiments, it should be understood that reading this specification will reveal to those skilled in the art various modifications thereof. The features of the various embodiments of the adhesive described herein can be combined into the adhesive. The various methods of making the adhesives of the invention described herein can be further combined. Therefore, it should be understood that the inventions described herein are intended to include such modifications within the scope of the appended claims. [Simple explanation of drawings] FIG. 1a is a cross-sectional view of an adhesive in which a non-adhesive material is embedded in the surface of the adhesive. FIG. 1b is a cross-sectional view of an adhesive in which a non-adhesive material is embedded in the surface of the adhesive. FIG. 2a is a cross-sectional view of an adhesive having a non-adhesive material embedded on the surface and an embossed finish such as a matte finish. FIG. 2b is a cross-sectional view of an adhesive having a non-adhesive material embedded on the surface and a textured finish such as a matte finish. FIG. 3a is a cross-sectional view of an adhesive projected from a plane of an adhesive surface. FIG. 3b is a cross-sectional view of an adhesive projected from a plane of an adhesive surface. FIG. 4a is a schematic diagram of the process of embedding a non-adhesive material using a non-adhesive material. FIG. 4b is a schematic diagram of the process of embedding a non-adhesive material using a non-adhesive material. FIG. 4c is a schematic diagram of the process of embedding a non-adhesive material using a non-adhesive material. FIG. 5 is a cross-sectional area of an adhesive with closely spaced patterns. FIG. 6a is a schematic diagram of the process of embedding a non-adhesive material and leaving a raised pattern at the same time. FIG. 6b is a schematic diagram of the process of embedding a non-adhesive material and leaving a raised pattern at the same time. FIG. 6c is a schematic diagram of the process of at the same time embedding a non-adhesive material and leaving a raised pattern.
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| JPH08332692A | Cites | Japan | Search report |
| JPS63196679A | Cites | Japan | Examiner |
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55 members in 9 offices
Priority claims14
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Numbers
- Publication
- 4771392
- Publication, DOCDB
- 4771392
- Publication, EPODOC
- JP4771392B
- Application
- 578203
- Application, DOCDB
- 2001578203
- Application, EPODOC
- JP20010578203
Titles2
- Japanese
- 脱気(空気出口)が改善された接着物およびその接着物を製作する方法
- English
- Adhesives with improved degassing (air outlet) and how to make those adhesives
Classification
- CPC, 15
- C09J7/10
- C09J7/35
- C09J7/38
- Y10T428/24826
- Y10T428/2486
- Y10T428/24851
- Y10T428/24355
- Y10T428/14
- Y10T428/1476
- Y10T428/25
- Y10T428/249953
- C09J2301/206
- C09J2301/204
- B32B9/00
- B32B37/00
- IPC, 4
- B32B3 00
- B32B27 00
- B32B38 00
- C09J7 10