WO2020138104A1 - 積層体 - Google Patents
積層体 Download PDFInfo
- Publication number
- WO2020138104A1 WO2020138104A1 PCT/JP2019/050676 JP2019050676W WO2020138104A1 WO 2020138104 A1 WO2020138104 A1 WO 2020138104A1 JP 2019050676 W JP2019050676 W JP 2019050676W WO 2020138104 A1 WO2020138104 A1 WO 2020138104A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transfer layer
- layer
- film
- adhesive
- base material
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Definitions
- the present invention relates to a laminate including a transfer layer and an adhesive layer. More specifically, the present invention relates to a laminate including a transfer layer and an adhesive layer, which is useful as an optical film and can be suitably used in, for example, a liquid crystal display device.
- a polarizing plate that is an essential member of a liquid crystal display device
- the liquid crystal panel to which the polarizing plate is attached warps, and the panel and the backlight member come into contact with each other to cause light. It is believed that unevenness will occur.
- Patent Document 1 a method using an optical film having low moisture permeability (Patent Document 1), a method of suppressing a force generated by a dimensional change of the optical film (Patent Documents 2 and 3), and the like have been proposed. There is.
- Patent Document 4 a method for reducing the warp of the panel by using a transferable optical film to reduce the thickness has been proposed.
- Patent Document 5 a method of multilayering the non-transfer area
- Patent Document 6 a transfer method of previously bending the transfer material and peeling the base material
- JP-A-2015-7768 Japanese Unexamined Patent Publication No. 2014-95880 International Publication No. 2017/138551 Japanese Patent Laid-Open No. 2017-215562 Japanese Patent Laid-Open No. 2003-103997 Japanese Unexamined Patent Publication No. 10-67199
- the transferable optical film disclosed in Patent Document 4 exhibits excellent effects, but in recent years, further improvement in performance has been demanded. There is room for consideration regarding stable peeling performance) and reduction of defects.
- Patent Document 5 when a long-sized laminate is produced, a conveyance position shift or a position shift caused by a dimensional change of each material in a wide laminate occurs, and the base material is peeled off. It turned out that the sex may not improve. Furthermore, it has been found that the method disclosed in Patent Document 6 may not be applicable due to structural restrictions of the production apparatus.
- the problem to be solved by the present invention is to provide a laminate including a transfer layer and an adhesive layer, which has good base material releasability and has few defects.
- an in-plane distribution is provided in the film thickness of the transfer layer, and the film thickness of the transfer layer at the position (P1) in contact with the end of the adhesive layer is set to the position inside (P2). It was found that the above problems can be solved by making the film thickness smaller than that of the transfer layer in the above, and the present invention has been completed.
- the present invention which is a specific means for solving the above problems, is as follows.
- the base material, the transfer layer, and the adhesive layer are included in this order, the transfer layer and the adhesive layer are adjacent to each other, the area of the transfer layer is larger than the area of the adhesive layer, and the film thickness of the transfer layer has an in-plane distribution. Is characterized in that the film thickness (t1) of the transfer layer at the position (P1) where the end of the sheet and the transfer layer are in contact is thinner than the film thickness (t2) of the transfer layer at the position (P2) inside thereof.
- Laminate. ⁇ 2> The laminate according to ⁇ 1>, wherein the difference between the adhesive force (fa1) between the transfer layer and the base material at P1 and the adhesive force (fa2) between the transfer layer and the base material at P2 is less than 3 N/25 mm.
- ⁇ 3> The laminate according to ⁇ 1> or ⁇ 2>, wherein the main material of the transfer layer is a thermoplastic resin.
- ⁇ 4> The laminate according to any one of ⁇ 1> to ⁇ 3>, wherein the laminate is a long laminate.
- ⁇ 5> The laminate according to ⁇ 3>, wherein the main material of the transfer layer is a vinyl aromatic resin or a cyclic olefin resin.
- ⁇ 6> The laminate according to any one of ⁇ 1> to ⁇ 4>, in which the main material of the transfer layer is a curable composition.
- ⁇ 7> The laminate according to any one of ⁇ 1> to ⁇ 6>, in which an optical film is adjacent to the surface of the adhesive layer opposite to the transfer layer.
- ⁇ 8> The laminate according to ⁇ 7>, wherein the optical film is a polarizing film or a protective film for the polarizing film.
- ⁇ 9> The laminate according to ⁇ 7>, wherein the optical film is a retardation film.
- a liquid crystal display device comprising a liquid crystal cell and the laminate according to any one of ⁇ 1> to ⁇ 9>.
- An organic electroluminescence display device comprising the organic electroluminescence element and the laminate according to any one of ⁇ 1> to ⁇ 9>.
- the schematic diagram which shows an example of the laminated body of this invention, and an example of a to-be-transferred body.
- the schematic diagram which shows the edge part vicinity of the adhesive layer of an example of the laminated body of this invention.
- the transfer layer in the present invention will be described.
- the transfer layer is adjacent to the adhesive layer, and typically, the adhesive layer of the laminate of the present invention is adhered to another article (transfer target), or the transfer layer and the transfer target are bonded together.
- the transfer layer/base material of the invention via an adhesive (adhesive layer) (see FIG. 1) and peeling the base material of the laminate of the present invention, the transfer layer is peeled from the base material to form the adhesive layer. And is transferred onto another article.
- the inside of P1 is separated between the transfer layer and the base material, and the outside of P1 is the transfer layer. Since it is left on the substrate side, for example, the problem that the transfer layer is torn in the subsequent step does not occur, and defects can be reduced, which is preferable.
- the transfer layer of the present invention has an in-plane distribution of the film thickness, and when the transfer layer and the adhesive layer are laminated, the film thickness of the transfer layer at a position (P1) where the end of the adhesive layer and the transfer layer can contact each other. It is characterized in that (t1) is thinner than the film thickness (t2) of the transfer layer at a position (P2) inside thereof.
- the “inside position (P2)” is typically a position where the adhesive layer and the transfer layer are in contact with each other, and a position closer to the center of the adhesive layer than P1 (FIGS. 1 and 2). 2).
- the substrate peeling property can be improved by reducing the film thickness in the vicinity of P1 and making the transfer layer easy to tear.
- the ratio of t1 to t2 is less than 1, preferably 0.9 or less, more preferably 0.8 or less, even more preferably 0.7 or less, and 0.6 or less. Most preferred. By reducing t1/t2, it is possible to reduce the frequency of tearing from an unexpected position, improve the base material peeling property, and reduce defects in the laminate.
- t1 is set within a range satisfying the above-mentioned t1/t2 ratio, and is preferably 0.05 to 7.0 ⁇ m, more preferably 0.2 to 4.5 ⁇ m, still more preferably 0.5 to 4.0 ⁇ m, and even more preferably 0.2. Most preferably, it is 7 to 3.5 ⁇ m.
- t1 is 0.05 ⁇ m or more, the frequency of occurrence of defects such as holes in the transfer layer near P1 is suppressed, which is preferable.
- the transfer layer in the laminate of the present invention has a region having a film thickness of t1 from the position P1 in contact with the end of the adhesive layer to the end of the transfer layer (also referred to as “P1 region”; see FIG. 2). Preferably.
- the P1 region may include a region to be transferred (a region in contact with the adhesive layer (also referred to as “transfer region”)) and a non-transfer region as shown in FIG.
- the transfer area may be treated as a non-product portion if it does not have a film thickness for exhibiting desired performance as an optical film as a product. From this point of view, it is preferable that the width of the region having the film thickness t1 (P1 region) is narrow from the viewpoint of increasing the product yield, but the positioning accuracy when stacking the transfer layer and the adhesive layer and It is preferably set in consideration of the dimensional changes of the transfer layer and the transferred material.
- the width of t1 is usually one side in consideration of the conveyance position accuracy in the width direction of the web. It is preferably 3 to 50 mm, more preferably 5 to 30 mm, still more preferably 10 to 20 mm.
- the width resulting from the dimensional change of the material is preferable to add the width resulting from the dimensional change of the material to the width of t1 in consideration of the transfer position accuracy.
- the additional amount of the width of t1 is preferably determined in consideration of the dimensional change rate, and the additional amount is preferably increased or decreased according to the width of the material).
- the transfer layer in the laminate of the present invention preferably has a region having a film thickness of t2 (also referred to as “P2 region”; see FIG. 2).
- t2 is a film thickness of a transfer region which is a product portion, and it is preferable that other properties such as mechanical strength are satisfied, preferably 0.1 to 10 ⁇ m, and 0. It is more preferably from 5 to 7.0 ⁇ m, even more preferably from 1.0 to 6.0 ⁇ m, most preferably from 1.5 to 5.5 ⁇ m.
- t2 is 0.1 ⁇ m or more, it is preferable from the viewpoint of ensuring the other performances of the transfer area to be the product, and when it is 10 ⁇ m or less, it is preferable from the viewpoint of substrate releasability and thinning of the laminate.
- a plate-shaped jig for removing the coating film is provided in the vicinity of P1 before the drying of the coating film is completed, and scraping is performed.
- a method such as pressing a jig such as a wire bar against the coating film in the vicinity of P1 to thin the coating film can be used.
- the film thickness may be nonuniform in the width direction, in which case t1 is evaluated at the thinnest portion.
- the transfer layer is formed by multi-layer coating and the coating widths of the first layer and the second layer are changed.
- the material of the wide layer and the material of the narrow layer can be changed so that the wide layer can be easily torn.
- the transfer layer is an amorphous polymer
- the temperature applied to the region near P1 is less than the Tg of the transfer layer, and the temperature applied to the P2 region is not less than the Tg of the transfer layer.
- the plane orientation of the region near P1 is promoted, and the plane orientation of the P2 region is suppressed.
- the transfer layer is a crystalline polymer, there is a method of partially heating the region near P1 to the crystallization temperature or higher.
- the in-plane distribution of the adhesive force between the transfer layer and the substrate is preferably small, and the adhesive force at P1 is:
- the difference from the adhesive force at P2 is preferably less than 3 N/25 mm, more preferably less than 1 N/25 mm, and even more preferably less than 0.5 N/25 mm.
- the adhesive force at P1 is preferably 0.001 to 5 N/25 mm, more preferably 0.01 to 3 N/25 mm, further preferably 0.1 to 1 N/25 mm, most preferably 0.15 to 0.8 N/25 mm. ..
- P2 is preferably set so that the in-plane distribution of the adhesive force falls within the above range.
- the in-plane distribution of the adhesive force between the transfer layer and the base material Is preferably smaller.
- the adhesive force between the transfer layer and the base material is controlled by adjusting the material of the transfer layer, the material of the base material, the internal strain of the transfer layer, and the like. be able to.
- the adhesive force between the transfer layer and the base material is obtained by attaching the transfer layer of the multilayer film cut into a width of 25 mm and a length of 80 mm to a glass substrate via an acrylic pressure-sensitive adhesive sheet and fixing the same.
- a tensile tester RTF-1210 manufactured by A&D Co., Ltd.
- the base material at one end (one side of width 25 mm) in the length direction of the test piece was grasped, and the temperature was 23° C. and the relative humidity was 60%.
- the breaking elongation of the transfer layer of the present invention is not particularly limited, but is preferably 0.1 to 10%, more preferably 0.3 to 7%, and further preferably 0.5 to 5%.
- the elongation at break of the transfer layer is 0.1% or more, cracks are less likely to occur in the transfer layer, and when it is 10% or less, the releasability of the base material is improved, which is preferable.
- the breaking elongation of the transfer layer the transfer layer was placed outside the bending in the state of the multilayer film of the transfer layer and the base material, and no crack was generated by the cylindrical mandrel method according to JIS K5600-5-1. The strain of the transfer layer is calculated and calculated from the diameter.
- the elastic modulus of the transfer layer of the present invention is not particularly limited, but is preferably 0.5 to 6.0 GPa, more preferably 1.5 to 4.5 GPa, and further preferably 2.0 to 3.5 GPa.
- the elastic modulus of the transfer layer is 0.5 GPa or more, the base material releasability is improved, which is preferable.
- the elastic modulus (tensile elastic modulus) of the transfer layer can be measured by using a film having a large thickness so that the self-supporting property can be maintained, if necessary.
- the elastic modulus of the film was cut so that the measuring direction was the longitudinal direction of the film and the measuring portion had a size of 10 cm ⁇ 1 cm, and the humidity was adjusted for 24 hours at 25° C. and 60% relative humidity, and manufactured by Toyo Baldwin Co., Ltd.
- STM T50BP the universal tensile tester
- the stress at 0.1% elongation and 0.5% elongation is measured at a tensile speed of 10%/min, and the elastic modulus is calculated from the slope.
- the glass transition temperature (Tg) of the transfer layer and the resin used for the transfer layer of the present invention is not particularly limited.
- the Tg was adjusted at 25° C. and a relative humidity of 10% for 24 hours, then the sample was sealed in a measuring pan, and the differential scanning calorimeter “DSC6200” manufactured by Seiko Instruments Inc. was used to increase the temperature at 20° C./min. From the thermogram obtained by heating, it can be obtained as the intersection temperature between the baseline and the tangent line at the inflection point.
- Characteristic values other than those described above of the transfer layer of the present invention are not particularly limited, and the performance equivalent to that of a generally known transfer film can be appropriately mounted, and the performance required for a general optical film. It is preferable to properly implement. Specific characteristic values include haze related to display characteristics, light transmittance, spectral characteristics, retardation, wet heat durability of retardation, and humidity, temperature, and wet heat thermometer related to mechanical characteristics and processability. The dimensional change rate, the equilibrium moisture absorption rate, the water vapor transmission rate, the contact angle and the like can be mentioned.
- the transfer layer of the present invention may be a single layer or may have a laminated structure of two or more layers.
- the width of each layer forming the transfer layer may be different, and for example, a laminated structure of two or more layers may be used for the purpose of providing a film thickness difference between t1 and t2. .. Further, by stacking functional layers, another function can be combined.
- the main material constituting the transfer layer of the present invention is not particularly limited, but a thermoplastic resin or a cured composition of a composition containing a reactive monomer can be preferably used.
- the main material forming the transfer layer is a component having the largest content (mass basis) among the components contained in the transfer layer.
- thermoplastic resin constituting the transfer layer of the present invention is not particularly limited, but preferably includes, for example, a polar structure that strengthens the interaction between polymer molecules from the viewpoint of improving brittleness and elastic modulus, It may be a crystalline polymer, an amorphous polymer or a liquid crystalline polymer.
- known vinyl aromatic resins styrene resins, divinylbenzene resins, vinyl pyridine resins, etc.
- cyclic olefin resins cellulose resins (cellulose acylate resins, cellulose ether resins, etc.)
- polyester resins polycarbonate resins, vinyl resins other than vinyl aromatic resins, polyimide resins, polyarylate resins, and the like.
- styrene resins and cyclic olefin resins are preferable from the viewpoint of hydrophobicity of the material, and cellulose acylate resins are preferable from the viewpoint of brittleness.
- paragraphs [0035] to [0041] of JP-A-2017-167514 describe the vinyl aromatic resin and the styrene resin, which can be appropriately used. ..
- the cyclic olefin-based resin is specifically described in paragraphs [0047] to [0049] of JP-A-2017-215562 and can be appropriately used.
- cellulose acylate resin examples include cellulose acetate, cellulose acetate propionate, cellulose propionate, cellulose acetate butyrate, cellulose acetate propionate butyrate, and cellulose acetate benzoate. Among them, cellulose acetate and cellulose acetate propionate, which have microcrystalline properties and are excellent in mechanical strength and thermal dimensional stability, are preferable.
- the polycarbonate resin examples include polycarbonate, a polycarbonate containing a structural unit in which bisphenol A is modified with fluorene, and a polycarbonate containing a structural unit in which bisphenol A is modified with 1,3-cyclohexylidene.
- vinyl resins examples include polyethylene, polypropylene, polystyrene, polyvinylidene chloride, polyvinyl alcohol, and the like.
- thermoplastic resin constituting the transfer layer of the present invention may be one type or may include two or more types. When the transfer layer is formed of multiple layers, the thermoplastic resin of each layer may be different.
- a known curable composition can be used as another aspect of the transfer layer of the present invention.
- the curable composition is not particularly limited and includes known acrylic monomers, epoxy monomers and the like.
- the above-mentioned thermoplastic resin may be appropriately mixed with a curable composition.
- the reactive monomer examples include a compound having a cycloaliphatic hydrocarbon group and an unsaturated double bond group described in JP-A-2014-170130, paragraphs [0016] to [0044], and a fluorene ring.
- the compounds having an unsaturated double bond group are described in the polyfunctional monomers and the like described in paragraphs [0109] to [0133] of JP-A-2013-231955 and can be used appropriately.
- a boronic acid monomer described in WO2015/053359 may be used in combination in order to impart water glue adhesiveness to the polarizing film.
- the curable composition may include a known polymerization initiator, and a photopolymerization initiator is preferable.
- a photopolymerization initiator acetophenones, benzoins, benzophenones, phosphine oxides, ketals, anthraquinones, thioxanthones, azo compounds, peroxides, 2,3-dialkyldione compounds, disulfide compounds, Examples thereof include fluoroamine compounds, aromatic sulfoniums, lophine dimers, onium salts, borate salts, active esters, active halogens, inorganic complexes, coumarins and the like. Specific examples, preferred embodiments, commercially available products, etc. of the photopolymerization initiator are described in paragraphs [0133] to [0151] of JP-A-2009-098658 and can be used appropriately.
- Known additives can be appropriately mixed in the transfer layer of the present invention.
- Known additives include low-molecular plasticizers, leveling agents, oligomer-based additives, polyester-based additives, retardation modifiers, fine particles, ultraviolet absorbers, deterioration inhibitors, peeling accelerators, visible light absorbers (pigments), Examples thereof include infrared absorbers, antioxidants, fillers, compatibilizers, polarization degree improvers and anti-fading agents.
- the transfer layer tends to be easily torn, and it can be used for the purpose of controlling the easiness of tearing of the transfer layer. It can also be used for the purpose of controlling the adhesive force between the transfer layer and the substrate.
- the type and amount of the additive in each layer may be different.
- Fine particles can be added to the transfer layer of the present invention for the purpose of controlling easiness of tearing, slipperiness and prevention of blocking.
- the amount of the fine particles added is preferably such that the transparency of the transfer layer is not impaired.
- the fine particles silica (silicon dioxide, SiO 2 ) whose surface is coated with a hydrophobic group and which is in the form of secondary particles is preferably used.
- the fine particles include titanium dioxide, aluminum oxide, zirconium oxide, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, hydrated calcium silicate, aluminum silicate, magnesium silicate, phosphoric acid together with or instead of silica.
- Fine particles such as calcium may be used. Examples of commercially available products include, for example, trade name R972 or NX90S (all manufactured by Nippon Aerosil Co., Ltd.).
- a known polyester-based additive may be appropriately mixed in the transfer layer of the present invention for the purpose of controlling the adhesive force between the transfer layer and the substrate.
- a compound that reduces the surface energy difference between the transfer layer and the base material a compound containing a component having a glass transition temperature lower than room temperature, or a compound that has permeability to the base material is added, the transfer layer and the base material become Has the effect of increasing the adhesive strength of.
- the polyester-based additive is specifically described in paragraphs [0075] to [0082] of JP-A-2013-231955 and can be used appropriately.
- a known leveling agent can be appropriately mixed in the transfer layer of the present invention.
- the leveling agent include conventionally known compounds, but a fluorine-containing surfactant is particularly preferable. Specific examples thereof include the compounds described in paragraphs [0028] to [0056] in the specification of JP 2001-330725 A.
- a dye can be appropriately added to the transfer layer of the present invention.
- the optimum absorption wavelength band of the dye varies depending on the design of the display device.
- a dye having a main absorption wavelength band at a wavelength of 460 to 520 nm (hereinafter referred to as dye A) or a wavelength of 560 to 620 nm.
- a dye having a main absorption wavelength band (hereinafter referred to as dye B) is preferable.
- the transfer layer of the present invention may contain a dye other than the dye A and the dye B.
- the dye A is not particularly limited as long as it has a main absorption wavelength band in the wavelength of 460 to 520 nm, and various dyes can be used. Most of the dye A exhibits fluorescence.
- having a main absorption wavelength band in the wavelengths XX to YYnm means that the wavelength exhibiting the maximum absorption wavelength exists in the wavelength region XX to YYnm in the visible light absorption spectrum (wavelength region 380 to 750 nm). .. Therefore, if this wavelength is within the above wavelength range, the entire absorption band including this wavelength may be within the above wavelength range or may extend beyond the above wavelength range.
- the maximum absorption wavelength exhibiting not the highest absorbance may exist outside the wavelength region XX to YYnm.
- the maximum absorption wavelength exhibiting not the highest absorbance may exist outside the wavelength region XX to YYnm.
- the dye A include, for example, pyrrolemethine (PM)-based dyes, rhodamine (RH)-based dyes, boron dipyrromethene (BODIPY)-based dyes, squaline (SQR)-based dyes, and the like.
- PM pyrrolemethine
- RH rhodamine
- BODIPY boron dipyrromethene
- SQR squaline
- FDB-007 trade name, merocyanine dye, manufactured by Yamada Chemical Co., Ltd.
- the dye B is not particularly limited as long as it has a main absorption wavelength band at a wavelength of 560 to 620 nm, and various dyes can be used. Many of the dyes B have weaker fluorescence than the dye A or do not show fluorescence. Specific examples of the dye B include tetraazaporphyrin (TAP)-based dyes, squalin-based dyes, and cyanine (CY)-based dyes.
- TEP tetraazaporphyrin
- CY cyanine
- An anti-fading agent can be appropriately added to the transfer film of the present invention.
- the anti-fading agent used in the present invention include the antioxidants described in paragraphs [0143] to [0165] of WO 2015/005398, the radical scavengers described in [0166] to [0199], and The deterioration preventing agents described in [0205] to [0206] can be used.
- the base material used for forming the transfer layer by the coating method preferably has a film thickness of 5 to 100 ⁇ m, more preferably 10 to 75 ⁇ m, and further preferably 15 to 55 ⁇ m.
- the film thickness is 5 ⁇ m or more, sufficient mechanical strength can be easily secured, and failures such as curling, wrinkling, and buckling hardly occur, which is preferable.
- the film thickness is 100 ⁇ m or less, the base material peeling property tends to be improved, which is preferable.
- the mechanism by which the substrate peeling property is improved when the film thickness of the substrate is smaller is unknown, but it is considered that the transfer layer is easily torn because the peeling angle of the substrate approaches an acute angle.
- the surface energy of the base material is not particularly limited, but the relationship between the surface energy of the material of the transfer layer or the coating solution and the surface energy of the surface of the base material on which the transfer layer is formed is adjusted.
- the adhesive force between the transfer layer and the substrate can be adjusted by the method. If the surface energy difference is reduced, the adhesive force tends to increase, and if the surface energy difference is increased, the adhesive force tends to decrease, which can be set appropriately.
- the surface energy of the substrate can be calculated from the contact angle values of water and methylene iodide using the Owens method. DM901 (manufactured by Kyowa Interface Science Co., Ltd., contact angle meter) can be used to measure the contact angle.
- the surface energy of the side of the substrate on which the transfer layer is formed is not particularly limited, but is preferably 41.0 to 48.0 mN/m, and more preferably 42.0 to 48.0 mN/m. .. When the surface energy is 41.0 mN/m or more, the uniformity of the film thickness of the transfer layer can be improved, and when it is 48.0 mN/m or less, the peeling force between the transfer layer and the substrate is in an appropriate range. It is preferable because it can be easily controlled.
- the surface irregularities of the substrate are not particularly limited, but the surface energy of the transfer layer surface, hardness, surface irregularities, and the surface energy of the surface of the substrate opposite to the side on which the transfer layer is formed, It can be adjusted according to the relationship with the hardness for the purpose of preventing adhesion failure when the multilayer film of the present invention is stored in the form of a long roll. Increasing the surface irregularities tends to suppress adhesion failure, and decreasing the surface irregularities tends to reduce the surface irregularities of the transfer layer and reduce the haze of the transfer layer, which can be appropriately set.
- a base material known materials and films can be appropriately used. Specific materials include polyester polymers, olefin polymers, cycloolefin polymers, (meth)acrylic polymers, cellulose polymers, polyamide polymers, and the like.
- surface treatment can be appropriately performed for the purpose of adjusting the surface property of the substrate. To reduce the surface energy, for example, corona treatment, room temperature plasma treatment, saponification treatment and the like can be performed, and to increase the surface energy, silicone treatment, fluorine treatment, olefin treatment and the like can be performed.
- the transfer layer of the present invention can be prepared by a method of forming a coating layer on a substrate by a known method.
- the main material of the transfer layer is a thermoplastic resin
- a known solution film-forming method, melting method According to the extrusion method, co-casting, co-extrusion, and appropriate stretching and the like can be combined for production.
- the material of the transfer layer is applied to the film that is the base material to form the coating layer.
- the surface of the substrate may be appropriately coated with a release agent or the like in advance.
- the coating layer can be used by peeling the base material after being laminated with the polarizing layer via an adhesive or a pressure-sensitive adhesive in a later step.
- the substrate in the state where the polymer solution or the coating layer is laminated on the substrate, the substrate can be appropriately stretched to adjust the optical characteristics and mechanical properties.
- the solution film-forming method a solution in which the material for the transfer layer is dissolved in an organic solvent or water is prepared, and a concentration step and a filtration step are appropriately performed, and then the solution is uniformly cast on a support. Next, the raw dry film is peeled from the support, and both ends of the web are appropriately held by clips or the like to dry the solvent in the drying zone. In addition, the stretching can be performed separately during or after the film is dried.
- the solvent used for the solution of the transfer layer material can dissolve or disperse the transfer layer material, tends to have a uniform surface state in the coating step and the drying step, can secure the liquid storability, and has an appropriate saturated vapor pressure. It can be appropriately selected from the viewpoints of having, and the like.
- melt extrusion method is specifically described in paragraphs [0085] to [0090] of JP-A-2017-215562 and can be appropriately used.
- the transfer layer is preferably subjected to hydrophilic treatment such as known glow discharge treatment, corona discharge treatment, or alkali saponification treatment, and corona discharge treatment is most preferably used. It is also preferable to apply the method disclosed in JP-A-6-94915 or JP-A-6-118232.
- the obtained film can be subjected to a heat treatment step, a superheated steam contact step, an organic solvent contact step, etc., if necessary. Further, it can be applied as a hard coat film, an antiglare film, or an antireflection film after surface treatment.
- the material used as the adhesive layer of the present invention is not particularly limited, and a known adhesive or pressure-sensitive adhesive composition can be used.
- an ultraviolet curable adhesive can be preferably used.
- the type of the UV curable adhesive is not particularly limited, but the epoxy UV curable adhesive described in JP-A-2015-187744 and the acrylate-based UV curable adhesive described in JP-A-2015-11094. It is preferable to use agents.
- water-based adhesive As the water-based adhesive, an aqueous solution of polyvinyl alcohol or polyvinyl acetal (for example, polyvinyl butyral) or a latex of vinyl-based polymer (for example, polybutyl acrylate) can be used.
- polyvinyl alcohol or polyvinyl acetal for example, polyvinyl butyral
- vinyl-based polymer for example, polybutyl acrylate
- An adhesive composition can be used as a pressure-sensitive adhesive (adhesive).
- the pressure-sensitive adhesive composition described in paragraphs [0106] to [0111] of JP-A-2017-215562 and the cross-linking agent described in paragraph [124] may be appropriately used. You can
- the film thickness of the adhesive layer of the present invention is not particularly limited, but in the case of a curable adhesive, it is preferably 0.1 to 10 ⁇ m from the viewpoint of achieving both adhesiveness to a transfer target and adhesive curability. , 0.5 to 5 ⁇ m is more preferable, and 1 to 3 ⁇ m is still more preferable. Further, in the case of a water-based adhesive, from the viewpoint of achieving both adhesiveness with a transfer target and drying of the adhesive, 1 to 1000 nm is preferable, 10 to 500 nm is more preferable, and 30 to 300 nm is even more preferable.
- the transfer layer of the present invention includes a substrate, a transfer layer, and an adhesive layer in this order.
- the laminate of the present invention can be produced by a known method, and is laminated such that the transfer layer and the adhesive layer are adjacent to each other and the transfer layer is wider than the adhesive layer. That is, in the laminate of the present invention, the area of the transfer layer is larger than the area of the adhesive layer.
- the laminate of the present invention has a rectangular shape (may be a long shape) (further, the base material, the transfer layer, and the adhesive layer have a rectangular shape), and the end portion in the width direction of the transfer layer.
- the adhesive layer can be laminated so that the exposed portion is exposed (see FIGS. 1 and 2).
- FIG. 1 shows a schematic view of an example of a laminated body in which the laminated body of the present invention is a long laminated body.
- the layered product of the present invention is excellent in terms of substrate peeling property and defects. Therefore, by using the laminate of the present invention, for example, a laminate film of a transfer layer and an adhesive layer, which is useful as an optical film used in a liquid crystal display device or the like, can be provided with high yield. Further, by using the laminate of the present invention, it is possible to provide a liquid crystal display device that is less likely to cause light unevenness and has excellent reliability.
- a polarizing film may be arranged on the side of the adhesive layer of the present invention opposite to the transfer layer.
- the polarizing film preferably used may be, for example, a polyvinyl alcohol film dipped in an iodine solution and stretched.
- the transfer layer of the present invention can be attached to one side or both sides of the polarizing film via the above-mentioned adhesive layer.
- a step of peeling and removing the base material from the transfer layer is included in the step after manufacturing the laminate of the present invention.
- the base material can be peeled and removed by, for example, a method similar to the peeling step of a separator (release film) used for ordinary pressure-sensitive adhesives.
- the timing of peeling can be the next step or winding once in a roll shape. It can be carried out at an arbitrary timing, such as another step after the step.
- An antistatic layer may be further laminated on the laminate containing the transfer layer of the present invention.
- the antistatic layer is not particularly limited as long as it contains an antistatic agent, but from the viewpoint of obtaining good antistatic performance, the elastic modulus of the layer is preferably less than 1 GPa, and is preferably 0.1 GPa or less. More preferably, it is even more preferably 0.05 GPa or less.
- Specific examples thereof include a pressure-sensitive adhesive composition containing an antistatic agent, and examples thereof include the antistatic agent and the antistatic agent described in paragraphs [0112] to [0122] of JP-A-2017-215562.
- the pressure-sensitive adhesive composition can be used as appropriate.
- a pressure-sensitive adhesive composition to which an antistatic agent is added so as to have a surface resistance value of about 1 ⁇ 10 8 to 1 ⁇ 10 11 ⁇ /cm 2 may be used in a release film, an optical film, or the like. It can be formed by applying it to a substrate.
- the laminate of the present invention can be used in a known liquid crystal display device or organic electroluminescence display device.
- a peelable multilayer film was produced by the method shown below. 1) Preparation of coating liquid A coating liquid 1 for forming a multilayer film was prepared with the composition shown below.
- a multilayer film A1 was obtained by producing a multilayer film A1 having a coating film width of 1320 mm and a film thickness (t2) near the center of the width after drying being the value shown in Table 1. Specifically, it is applied by a die coating method using a slot die described in Example 1 of JP-A-2006-122889 at a conveying speed of 30 m/min. The coating film was scraped off, and the film thickness (t1) after drying was adjusted to the value shown in Table 1 and dried at 105° C. for 30 seconds. After that, it was wound up.
- Multilayer film A2> A film was prepared in the same manner as the multilayer film A1 except that the coating solution for the multilayer film A1 was changed to the following coating solution 2 to obtain a multilayer film A2.
- coating liquid 2 AS-70 100.0 parts by mass SMA2000P 5.0 parts by mass Byron 500 0.9 parts by mass Surfactant 1 0.1 parts by mass Methyl acetate 250.0 parts by mass Acetonitrile 225.0 parts by mass 25.0 parts by mass of ethanol
- the obtained coating liquid was filtered with a filter having an absolute filtration accuracy of 1 ⁇ m.
- ⁇ AS-70 Acrylonitrile/styrene copolymer resin [Nippon Steel & Sumikin Chemical Co., Ltd.] ⁇ SMA2000P [Kawabara Yuka Co., Ltd.] ⁇ Byron 500 [Toyobo Co., Ltd.] -Surfactant 1: The surfactant having the following structure was used.
- Multilayer film A3> Of the coating solution for the multilayer film A1, except that the amount of Byron 550 added was changed from 1.0 parts by mass to 3.0 parts by mass, and the base material was changed to a corona-treated polyethylene terephthalate film at both ends of 30 mm. A film was produced in the same manner as the multilayer film A1 to obtain a multilayer film A3.
- Multilayer film A4> The coating solution for the multilayer film A1 was replaced with the following coating solution 4, and the coating substrate was replaced with a commercially available polyethylene terephthalate film, Emblet SK50 (film thickness 50 ⁇ m, width 1340 mm, manufactured by Unitika Ltd.), and A film was produced in the same manner as in the multilayer film A1 except that the coating film was dried at 120° C. to obtain a multilayer film A4.
- -Anti-fading agent 1 A surfactant having the following structure was used.
- -Surfactant 2 A surfactant having the following structure was used.
- t-Bu means a tert-butyl group.
- ⁇ Mat agent 1 Silicon dioxide fine particles, NX90S [manufactured by Nippon Aerosil Co., Ltd.]
- a polarizing plate which is a laminate, was produced using the multilayer film, the adhesive, the polarizer, and the opposing film.
- 1) Preparation of Adhesive A polymerizable compound, an initiator and a sensitizer were mixed by the method shown below to prepare an adhesive composition.
- an air-cooled metal halide lamp manufactured by Eye Graphics Co., Ltd.
- ultraviolet rays having an irradiation dose of 300 mJ/cm 2 .
- the obtained polarizing plate was cut and the cross section was observed with an optical microscope, and it was confirmed that the thickness of the adhesive (adhesive layer) was 2.5 ⁇ m on both the multilayer film side and the counter film side.
- C Sputtering or wrinkling occurred sporadically on the substrate immediately after peeling, and a small amount of dust was generated in the transfer layer after the substrate was peeled off, or a slight crack was generated in the transfer layer.
- D Always scratches and wrinkles were confirmed on the base material immediately after peeling, dust was generated in the transfer layer after the base material was peeled off, or cracks were generated in the transfer layer. The work could not be carried out.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
Description
基材、転写層、接着層をこの順に含み、転写層と接着層が隣接し、転写層の面積が接着層の面積より広く、且つ、転写層の膜厚に面内分布があり、接着層の端部と転写層とが接した位置(P1)における転写層の膜厚(t1)が、それよりも内側の位置(P2)における転写層の膜厚(t2)より薄いことを特徴とする積層体。
<2>
上記P1における転写層と基材との接着力(fa1)と、上記P2における転写層と基材との接着力(fa2)との差が、3N/25mm未満である<1>に記載の積層体。
<3>
上記転写層の主材料が熱可塑性樹脂である<1>または<2>に記載の積層体。
<4>
上記積層体が、長尺状の積層体である<1>~<3>のいずれか一項に記載の積層体。
<5>
上記転写層の主材料が、ビニル芳香族系樹脂、または環状オレフィン系樹脂である<3>に記載の積層体。
<6>
上記転写層の主材料が、硬化性組成物である<1>~<4>のいずれか一項に記載の積層体。
<7>
上記接着層の、転写層とは反対側の面に、光学フィルムが隣接した<1>~<6>のいずれか一項に記載の積層体。
<8>
上記光学フィルムが、偏光膜、または偏光膜の保護フィルムである<7>に記載の積層体。
<9>
上記光学フィルムが、位相差フィルムである<7>に記載の積層体。
<10>
液晶セルと、<1>~<9>のいずれか一項に記載の積層体を含む液晶表示装置。
<11>
有機エレクトロルミネッセンス素子と、<1>~<9>のいずれか一項に記載の積層体を含む有機エレクトロルミネッセンス表示装置。
本発明における転写層について説明する。
本発明の積層体において、転写層は接着層と隣接しており、典型的には、他の物品(被転写体)に本発明の積層体の接着層を接着させる、または被転写体と本発明の転写層・基材とを接着剤(接着層)を介して積層させ(図1参照)、本発明の積層体の基材を剥がすことで、転写層は基材から剥離して接着層と共に他の物品上に転写されるものである。
この際、転写層の引き裂きに必要な力が、転写層を基材から剥がすのに必要な力を下回れば、P1より内側は転写層と基材間で剥離し、P1より外側は転写層が基材側に残る状態となるため、例えば、後工程で転写層が千切れるような問題が起こらず、欠陥を低減することができ、好ましい。
本発明の転写層は、膜厚の面内分布があり、転写層と接着層とを積層する際に、接着層の端部と転写層とが接しうる位置(P1)における転写層の膜厚(t1)が、それよりも内側の位置(P2)における転写層の膜厚(t2)より薄いことを特徴とする。ここで、「内側の位置(P2)」は、典型的には、接着層と転写層とが接する位置であって、P1よりも接着層の中央に近い側の位置を表す(図1及び図2参照)。
基材剥離性は、P1付近の膜厚を低減し、転写層が裂けやすくすることによって改善することができる。具体的には、t1とt2との比(t1/t2)は1未満であり、0.9以下が好ましく、0.8以下がより好ましく、0.7以下がさらに好ましく、0.6以下が最も好ましい。t1/t2を小さくすることで、想定外の位置から裂ける頻度を低減することができ、基材剥離性が良化し、積層体の欠陥を低減することができる。
また、本発明の積層体における転写層は、接着層の端部と接する位置P1から転写層の端部にかけて膜厚がt1である領域(「P1領域」とも呼ぶ。図2参照。)を有していることが好ましい。P1領域は、図1に示したように転写される領域(接着層に接している領域(「転写領域」とも呼ぶ。))と非転写領域を含むものであってもよいが、P1領域中の転写領域は、例えば製品としての光学フィルムとして所望の性能を発揮するための膜厚を有していない場合には、非製品部として扱われる場合もある。このような観点からは、膜厚をt1とする領域(P1領域)の幅は、製品の得率を上げる観点では狭いほうが好ましいが、転写層と接着層とを積層する際の位置決めの精度や、転写層や被転写体の寸法変化等を考慮して設定されることが好ましい。例えば、本発明の積層体が、長尺状の積層体である場合にはP1は幅方向両端部付近となり、t1の幅は、ウェブの幅手方向の搬送位置精度を考慮し、通常、片側3~50mmが好ましく、5~30mmがより好ましく、10~20mmが更に好ましい。転写層や被転写層の温度や湿度による寸法変化が位置精度に優位に影響する場合には、搬送位置精度を考慮したt1の幅に、材料の寸法変化に起因する幅を上乗せすることが好ましい(この場合、t1の幅の上乗せ量は、寸法変化率を考慮して決定することが好ましく、材料の幅に応じて、上乗せ量を増減することが好ましい)。
t1を部分的に薄くする別の方法として、転写層が非晶性ポリマーの場合に、P1近傍の領域にかかる温度を転写層のTg未満とし、P2領域にかかる温度を転写層のTg以上とすることにより、P1近傍の領域の面配向を進め、P2領域は面配向が抑制された状態とする方法がある。また、転写層が結晶性ポリマーの場合に、P1近傍の領域を、部分的に結晶化温度以上まで加熱する方法がある。
本発明の転写層と基材の複層フィルムにおいて、基材を安定的に剥離するために、転写層と基材との接着力の面内分布は小さい方が好ましく、P1における接着力と、P2における接着力との差は、3N/25mm未満であることが好ましく、1N/25mm未満であることがより好ましく、0.5N/25mm未満であることが更に好ましい。
P1における接着力は、0.001~5N/25mmが好ましく、0.01~3N/25mmがより好ましく、0.1~1N/25mmが更に好ましく、0.15~0.8N/25mmが最も好ましい。0.001N/25mm以上であれば、基材の剥離工程以外における想定外の剥離故障を防ぐことができ、5N/25mm以下であれば、剥離工程における剥離不良(例えば、ジッピングや、転写層の割れ)を防ぐことができる。
また、P2における接着力は、高い方が基材剥離性は良化するが、接着力の面内分布が大きいと、基材や被転写体にシワやツレが発生し、散発的に基材剥離性が悪化することがあるため、接着力の面内分布が前述の範囲になるように、P2は設定されることが好ましい。すなわち、転写層の基材を剥離する際に、基材や被転写体にシワやツレの発生がなく、安定的に剥離するためには、転写層と基材との接着力の面内分布は小さい方が好ましい。
本発明の転写層を、コーティング法で形成させる場合、転写層と基材との間の接着力は、上記転写層の材料、基材の材料、転写層の内部歪み等を調整して制御することができる。
本発明の転写層の破断伸度は、特に限定されないが、0.1~10%であることが好ましく、0.3~7%がより好ましく、0.5~5%が更に好ましい。転写層の破断伸度が0.1%以上であると、転写層にクラックが入り難くなるため好ましく、10%以下であると、基材剥離性が良化するため好ましい。転写層の破断伸度は、転写層と基材の複層フィルムの状態で、転写層を曲げの外側に配置し、JIS K5600-5-1に準じた円筒形マンドレル法でクラックの起こらなかった直径から、転写層の歪みを算出して求める。
本発明の転写層の弾性率は、特に限定されないが、0.5~6.0GPaが好ましく、1.5~4.5GPaがより好ましく、2.0~3.5GPaが更に好ましい。転写層の弾性率が0.5GPa以上であると、基材剥離性が良化するため好ましい。
本発明の転写層や、転写層に用いる樹脂のガラス転移温度(Tg)は、特に限定されない。Tgは、例えば、25℃、相対湿度10%において24時間調湿した後、測定パンにサンプルを封入し、セイコーインスツルメンツ(株)製示差走査熱量計“DSC6200”を用い、20℃/分で昇温させて得られたサーモグラムから、ベースラインと変曲点での接線との交点温度として求めることができる。
本発明の転写層の上述以外の特性値は、特に限定されることはなく、一般的な公知の転写膜と同等の性能を適宜実装することができ、一般的な光学フィルムに要求される性能を適宜実装していることが好ましい。具体的な特性値としては、表示特性に関連するヘイズ、光線透過率、分光特性、レタデーション、レタデーションの湿熱耐久性等を挙げることができ、力学特性や加工適性に関連する湿度や温度や湿熱サーモに伴う寸法変化率、平衡吸湿率、透湿度、接触角等を挙げることができる。
本発明の転写層は、単層であっても、2層以上の積層構造を有していてもよい。2層以上の積層構造の場合には、転写層を構成する各層の幅が異なっていてもよく、例えば、t1とt2の膜厚差を付与する目的で、2層以上の積層構造としてもよい。また、機能層を積層して、別の機能を複合化することもできる。
本発明の転写層を構成する主材料は、特に限定されないが、熱可塑性樹脂、または反応性モノマーを含む組成物の硬化組成物などを好適に用いることができる。
なお、転写層を構成する主材料とは、転写層に含まれる成分のうち最も含有量(質量基準)が多い成分である。
本発明の転写層を構成する熱可塑性樹脂は特に限定されないが、脆性及び弾性率改良の観点からポリマー分子間の相互作用を強くするような、例えば極性構造を含むことが好ましく、結晶性ポリマーであっても、非晶性ポリマーであっても、液晶性ポリマーであってもよい。具体的な例として、公知のビニル芳香族系樹脂(スチレン系樹脂、ジビニルベンゼン系樹脂、ビニルピリジン系樹脂等)、環状オレフィン系樹脂、セルロース系樹脂(セルロースアシレート樹脂、セルロースエーテル樹脂等)、ポリエステル系樹脂、ポリカーボネート系樹脂、ビニル芳香族系樹脂以外のビニル系樹脂、ポリイミド系樹脂、ポリアリレート系樹脂等を挙げることができる。これらのうち、スチレン系樹脂、環状オレフィン樹脂は、材料の疎水性の観点で好ましく、セルロースアシレート樹脂は脆性の観点で好ましい。
ポリカーボネート樹脂の例としては、ポリカーボネート、ビスフェノールAがフルオレン変性された構造単位を含むポリカーボネート、ビスフェノールAが1,3-シクロヘキシリデン変性された構造単位を含むポリカーボネート等が挙げられる。
ビニル系樹脂の例としては、ポリエチレン、ポリプロピレン、ポリスチレン、ポリ塩化ビニリデン、ポリビニルアルコール、等が挙げられる。
本発明の転写層の別の態様として公知の硬化性組成物を用いることができる。硬化性組成物は、特に限定されることはなく、公知のアクリル系モノマー、エポキシ系モノマー等を含む。また、適宜前述の熱可塑性樹脂に硬化性組成物を混合して実施してもよい。
上記の硬化性組成物は、公知の重合開始剤を含むことができ、光重合開始剤が好ましい。
光重合開始剤としては、アセトフェノン類、ベンゾイン類、ベンゾフェノン類、ホスフィンオキシド類、ケタール類、アントラキノン類、チオキサントン類、アゾ化合物、過酸化物類、2,3-ジアルキルジオン化合物類、ジスルフィド化合物類、フルオロアミン化合物類、芳香族スルホニウム類、ロフィンダイマー類、オニウム塩類、ボレート塩類、活性エステル類、活性ハロゲン類、無機錯体、クマリン類などが挙げられる。光重合開始剤の具体例、及び好ましい態様、市販品などは、特開2009-098658号公報の段落[0133]~[0151]に記載があり、適宜使用することができる。
本発明の転写層には、公知の添加剤を適宜混合することができる。公知の添加剤として、低分子可塑剤、レベリング剤、オリゴマー系添加剤、ポリエステル系添加剤、レタデーション調整剤、微粒子、紫外線吸収剤、劣化防止剤、剥離促進剤、可視光吸収剤(色素)、赤外線吸収剤、酸化防止剤、フィラー、相溶化剤、偏光度向上剤、褪色防止剤等を挙げることができる。
これらの添加剤は、一般的に、添加量が増えると、転写層が裂けやすくなることが多く、転写層の裂けやすさを制御する目的で使うこともできる。また、転写層と基材との接着力を制御する目的で使うこともできる。
転写層が多層から形成される場合、各層の添加剤の種類や量は異なっていてもよい。
本発明の転写層には、裂けやすさの制御、滑り性やブロッキング防止等の目的で、微粒子を添加することができる。微粒子の添加量は、転写層の透明性が損なわれない範囲で添加されることが好ましい。この微粒子としては、疎水基で表面が被覆され、二次粒子の態様をとっているシリカ(二酸化ケイ素,SiO2)が好ましく用いられる。なお、微粒子には、シリカとともに、あるいはシリカに代えて、二酸化チタン、酸化アルミニウム、酸化ジルコニウム、炭酸カルシウム、タルク、クレイ、焼成カオリン、焼成珪酸カルシウム、水和珪酸カルシウム、珪酸アルミニウム、珪酸マグネシウム、燐酸カルシウムなどの微粒子を用いてもよい。市販の商品としては、微粒子は商品名R972、またはNX90S(いずれも日本アエロジル(株)製)などが挙げられる。
本発明の転写層には、転写層と基材との接着力を制御する等の目的で、公知のポリエステル系添加剤を適宜混合することができる。転写層と基材との表面エネルギー差が小さくなるような化合物や、ガラス転移温度が常温より低い成分を含む化合物や、基材への浸透性がある化合物を添加すると、転写層と基材との接着力を上昇させる効果がある。
ポリエステル系添加剤について、具体的には、特開2013-231955号公報の段落[0075]~[0082]に記載があり、適宜使用することができる。
本発明の転写層には、公知のレベリング剤(界面活性剤)を適宜混合することができる。レベリング剤としては、従来公知の化合物が挙げられるが、特に含フッ素界面活性剤が好ましい。具体的には、例えば特開2001-330725号公報明細書中の段落番号[0028]~[0056]記載の化合物が挙げられる。
本発明の転写層には、適宜色素を添加することができる。色素の最適な吸収波長帯は、表示装置の設計に応じて適宜変わるが、例えば、波長460~520nmに主吸収波長帯域を有する色素(以下、染料Aという。)、または、波長560~620nmに主吸収波長帯域を有する色素(以下、染料Bという。)が好ましい。また、本発明の転写層は染料Aおよび染料B以外の染料を含有することもできる。
本発明において、波長XX~YYnmに主吸収波長帯域を有するとは、可視光吸収スペクトル(波長領域380~750nm)において、極大吸収波長を示す波長が波長領域XX~YYnmに存在することを意味する。したがって、この波長が上記波長領域内にあれば、この波長を含む吸収帯域全体が上記波長領域内にあってもよく、上記波長領域外まで広がっていてもよい。また、極大吸収波長が複数存在する場合、最高ではない吸光度を示す極大吸収波長が波長領域XX~YYnm外に存在していてもよい。なお、極大吸収波長を示す波長が複数ある場合、そのうちの1つが上記波長領域に存在していればよい。
染料Bの具体例としては、例えば、テトラアザポルフィリン(tetraaza porphyrin、TAP)系、スクアリン系、シアニン(cyanine、CY)系の各染料が挙げられる。また、PD-311S(商品名、テトラアザポルフィリン系染料、山本化成社製)、FDG-006(商品名、テトラアザポルフィリン系染料、山田化学工業社製)等の市販品も染料Bとして好ましく用いることができる。
本発明の転写膜には、適宜褪色防止剤を添加することができる。本発明に用いる褪色防止剤としては、国際公開第2015/005398号の段落[0143]~[0165]に記載の酸化防止剤、同[0166]~[0199]に記載のラジカル捕捉剤、及び同[0205]~[0206]に記載の劣化防止剤を用いることができる。
転写層を、コーティング法で形成させるために用いられる基材は、膜厚が5~100μmであることが好ましく、10~75μmがより好ましく、15~55μmが更に好ましい。膜厚が5μm以上であると、十分な機械強度を確保しやすく、カール、シワ、座屈等の故障が生じにくいため、好ましい。また、膜厚が100μm以下であると、基材剥離性が良化する傾向があり、好ましい。基材の膜厚が薄い方が、基材剥離性が良化するメカニズムは不詳だが、基材の剥離角度が鋭角に近づくため、転写層が引裂かれやすくなるためであると考えられる。
基材の転写層を形成する側の表面エネルギーは、特に限定されないが、41.0~48.0mN/mであることが好ましく、42.0~48.0mN/mであることが、より好ましい。表面エネルギーが41.0mN/m以上であると、転写層の膜厚の均一性を高められるため好ましく、48.0mN/m以下であると、転写層を基材との剥離力を適切な範囲に制御しやすいため、好ましい。
本発明の転写層は、基材上に公知の方法でコーティング層を形成する方法で作製することができ、転写層の主材料が熱可塑性樹脂の場合には、公知の溶液製膜法、溶融押出し法に準じて、共流延や共押出し、適宜延伸等を組合せて作製することもできる。
本発明の接着層として用いる材料は、特に限定されることはなく、公知の接着剤や粘着剤組成物を用いることができる。
硬化型接着剤として、紫外線硬化型接着剤を好ましく用いることができる。紫外線硬化型接着剤の種類としては、特に限定されないが、特開2015-187744号公報に記載のエポキシ系紫外線硬化型接着剤や、特開2015-11094号公報に記載のアクリレート系紫外線硬化型接着剤を使用することが好ましい。
水系接着剤として、ポリビニルアルコール又はポリビニルアセタール(例えば、ポリビニルブチラール)の水溶液や、ビニル系ポリマー(例えば、ポリブチルアクリレート)のラテックスを用いることができる。
感圧性接着剤(粘着剤)として、粘着剤組成物を用いることができる。粘着剤組成物について、具体的には、特開2017-215562号公報の段落[0106]~[0111]に記載の粘着剤組成物、段落[124]に記載の架橋剤を、適宜使用することができる。
本発明の接着層の膜厚は、特に限定されないが、硬化型接着剤の場合は、被転写体との接着性と、接着の硬化性とを両立する観点から、0.1~10μmが好ましく、0.5~5μmがより好ましく、1~3μmが更に好ましい。また、水系接着剤の場合は、被転写体との接着性と、接着剤の乾燥性とを両立する観点から、1~1000nmが好ましく、10~500nmがより好ましく、30~300nmが更に好ましい。
本発明の転写層は、基材、転写層、接着層をこの順に含む。本発明の積層体は、公知の方法で作製することができ、転写層と接着層が隣接し、転写層が接着層より広くなるように積層される。すなわち、本発明の積層体において、転写層の面積が接着層の面積より広い。典型的には、本発明の積層体は矩形(長尺状であっても良い)であり(更に、基材、転写層、及び接着層が矩形であり)、転写層の幅方向の端部が露出するように接着層を積層することができる(図1及び図2参照)。
本発明の積層体が、長尺状の積層体である場合には、接着剤を介して積層される被転写体、および転写層を含む基材とも長尺状であり、ロールツーロールで貼合できることが好ましい。図1に積層体の一例として、本発明の積層体が長尺状の積層体である場合の模式図を示す。
本発明の積層体は、基材剥離性及び欠陥の観点で優れるものである。したがって、本発明の積層体を用いることで、例えば、液晶表示装置等に利用される光学フィルムとして有用な転写層と接着層の積層フィルムを歩留りよく提供することができる。また、本発明の積層体を用いることで、光ムラが発生しにくく、信頼性に優れる液晶表示装置を提供可能となる。
本発明の接着層の、転写層とは反対側に、偏光膜を配置することもできる。好ましく用いられる偏光膜としては、例えば、ポリビニルアルコールフィルムを沃素溶液中に浸漬して延伸したもの等を用いることができる。本発明の転写層は、前述の接着層を介して、偏光膜の片面または両面に対し、貼り合わせることができる。
本発明の積層体を作製した後の工程において、転写層から基材を剥離除去する工程を有する。基材の剥離除去は、例えば、通常の粘着剤に用いられるセパレータ(剥離フィルム)の剥離工程と同様の方法で実施することができ、剥離するタイミングは、次工程や、一度ロール状に巻き取った後の別工程など、任意のタイミングで実施することができる。
本発明の転写層を含む積層体には、更に帯電防止層を積層することもできる。帯電防止層は、帯電防止剤を含有していれば特に限定されないが、良好な帯電防止性能を得る観点から、層の弾性率が1GPa未満であることが好ましく、0.1GPa以下であることがより好ましく、0.05GPa以下であることが更に好ましい。
具体的には、帯電防止剤を含む粘着剤組成物などが挙げられ、例えば、特開2017-215562号公報の段落[0112]~[0122]に記載の帯電防止剤や、帯電防止剤を含む粘着剤組成物を、適宜使用することができる。帯電防止層は、例えば、約1×108~1×1011Ω/cm2の表面抵抗値を有するように帯電防止剤が添加された粘着剤組成物を、離型フィルム、光学フィルムなどの基材に塗布することによって形成することができる。
本発明の積層体は、公知の液晶表示装置や、有機エレクトロルミネッセンス表示装置に使用することができる。
下記に示す方法で、剥離性複層フィルムを作製した。
1)塗布液の調製
下記に示す組成で、複層フィルム形成用の塗布液1を調製した。
SGP-10 50.0質量部
エポクロスRPS-1005 48.7質量部
バイロン550 1.0質量部
A-19-1 0.3質量部
酢酸エチル 600.0質量部
得られた塗布液は絶対濾過精度1μmのフィルターで濾過し、塗布液1Sを得た。
・SGP-10:ポリスチレン[PSジャパン製]
・エポクロスRPS-1005:スチレン-オキサゾリン共重合体[日本触媒製]
・バイロン550[東洋紡(株)製]
・含フッ素共重合体(A-19-1):下記構造の重合体である。特開2018-5215号公報の合成例22([0183]~[0185])と同様に作製した。
市販のポリエチレンテレフタレートフィルム、エンブレットS38(膜厚38μm、幅1340mm、ユニチカ(株)製)を基材(コーティング基材)として用い、塗布液1Sを使用した。塗膜幅が1320mm、乾燥後の幅手中央付近の膜厚(t2)が表1記載の値となるように作製して、複層フィルムA1を得た。具体的には、特開2006-122889号公報実施例1記載のスロットダイを用いたダイコート法で、搬送速度30m/分の条件で塗布し、塗膜のエッジから両端20mmの部分は、塗布直後に塗膜を掻き取って、乾燥後の膜厚(t1)が表1記載の値となるようにし、105℃で30秒乾燥させた。その後、巻き取った。
上記複層フィルムA1の塗布液を、下記の塗布液2に替えた以外は複層フィルムA1と同様にしてフィルムを作製し、複層フィルムA2を得た。
AS-70 100.0質量部
SMA2000P 5.0質量部
バイロン500 0.9質量部
界面活性剤1 0.1質量部
酢酸メチル 250.0質量部
アセトニトリル 225.0質量部
エタノール 25.0質量部
得られた塗布液は絶対濾過精度1μmのフィルターで濾過した。
・AS-70:アクリロニトリル・スチレン共重合樹脂[新日鉄住金化学(株)製]
・SMA2000P[川原油化(株)]
・バイロン500[東洋紡(株)製]
・界面活性剤1:下記構造の界面活性剤を用いた。
上記複層フィルムA1の塗布液のうち、バイロン550の添加量を1.0質量部から3.0質量部に替え、更に基材を両端30mmずつをコロナ処理したポリエチレンテレフタレートフィルムに替えた以外は複層フィルムA1と同様にしてフィルムを作製し、複層フィルムA3を得た。
上記複層フィルムA1の塗布液を、下記の塗布液4に替え、コーティング基材を、市販のポリエチレンテレフタレートフィルム、エンブレットSK50(膜厚50μm、幅1340mm、ユニチカ(株)製)に替え、且つ塗膜の乾燥温度を120℃に替えた以外は複層フィルムA1と同様にしてフィルムを作製し、複層フィルムA4を得た。
SGP-10 85.6質量部
ザイロンS201A 10.0質量部
バイロン550 0.10質量部
色素1 0.33質量部
褪色防止剤1 4.0質量部
界面活性剤2 0.1質量部
マット剤1 0.002質量部
トルエン 767.3質量部
得られた塗布液は絶対濾過精度1μmのフィルターで濾過した。
・SGP-10:ポリスチレン[PSジャパン製]
・ザイロンS201A:ポリフェニレンエーテル樹脂[旭化成(株)製]
・バイロン550[東洋紡(株)製]
・色素1:下記構造の色素を用いた。
上記複層フィルム、接着剤、および偏光子、対向フィルムを用い、積層体である偏光板を作製した。
1)接着剤の調製
下記に示す方法で、重合性化合物、開始剤、増感剤を混合し、接着剤組成物を調製した。
エピオールEH-N 10.0質量部
リカレジンDME-100 20.0質量部
セロキサイド2021P 70.0質量部
CPI-100P 1.0質量部
IRGACURE290 4.0質量部
DarocurITX 0.5質量部
・エピオールEH-N[日油(株)製]
・リカレジンDME-100[新日本理化(株)製]
・セロキサイド2021P[ダイセル(株)製]
・CPI-100P[サンアプロ(株)製]
・IRGACURE290[BASF製]
・DarocurITX[BASF製]
特開2015-227458号公報の実施例1に準じて、厚さ60μmのポリメチルメタクリレートフィルムを作製し、対向フィルムA1とした。
上記作製した複層フィルムの基材側の界面とは反対側の面、及び対向フィルムA1にコロナ処理を行った。
特開2001-141926号公報の実施例1に従い、2対のニップロール間に周速差を与え、長手方向に延伸し、膜厚15μmの偏光子を作製した。
上記表面処理した複層フィルム、偏光子、対向フィルムA1をこの順で積層し、偏光板を得た。この際、フィルムの表面処理した面が偏光子側になるように配置し、接着には上記接着剤組成物を用いた。また、偏光子の吸収軸、複層フィルム、および対向フィルムA1の長手方向が平行になるようにロールツーロールで積層した。このとき、接着剤組成物の塗布幅は1300mmとし、接着剤組成物の両方の端部が、転写層のP1領域にくるように積層した。続けて、空冷メタルハライドランプ(アイグラフィックス(株)製)を用いて、照射量300mJ/cm2の紫外線を照射して硬化させた。得られた偏光板を切削して断面を光学顕微鏡で観察し、複層フィルム側、対向フィルム側とも、接着剤(接着層)の厚みが2.5μmであることを確認した。
上記作製した積層体である偏光板から、複層フィルムの基材を、セパレータの剥離装置と同様の装置を用いて連続剥離し、基材を剥離した後の積層体に関し、P1付近の転写層の切断状態を目視で確認した。結果(基材剥離性)は以下のように判定し、表1に示した。
<基材剥離性の評価>
A:剥離直後の基材をツレやシワなく安定的に剥離することができ、基材を剥離した後の転写層は欠陥がなく良好であった。
B:剥離直後の基材に、散発的にツレやシワが生じたが、基材を剥離した後の転写層は欠陥がなく良好であった。
C:剥離直後の基材に、散発的にツレやシワが生じ、基材を剥離した後の転写層に僅かに塵埃が発生したり、転写層に僅かな割れが生じることがあった。
D:剥離直後の基材に、常時ツレやシワが確認され、基材を剥離した後の転写層に塵埃が発生したり、転写層に割れが生じたりしたため、次工程である粘着剤の塗工を実施することができなかった。
上記作製した偏光板の、基材を剥離した面に、セパレータ上に塗工した帯電防止剤を含むアクリル系粘着剤を転写し、偏光板の加工を完了した。
本出願は、2018年12月26日出願の日本特許出願(特願2018-243277)に基づくものであり、その内容はここに参照として取り込まれる。
Claims (4)
- 基材、転写層、接着層をこの順に含み、前記転写層と前記接着層が隣接し、前記転写層の面積が前記接着層の面積より広く、且つ、前記転写層の膜厚に面内分布があり、前記接着層の端部と前記転写層とが接した位置P1における前記転写層の膜厚t1が、それよりも内側の位置P2における前記転写層の膜厚t2より薄いことを特徴とする積層体。
- 前記P1における前記転写層と前記基材との接着力fa1と、前記P2における前記転写層と前記基材との接着力fa2との差が、3N/25mm未満である請求項1に記載の積層体。
- 前記転写層の主材料が熱可塑性樹脂である請求項1または2に記載の積層体。
- 前記積層体が、長尺状の積層体である請求項1~3のいずれか一項に記載の積層体。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020563318A JP7073535B2 (ja) | 2018-12-26 | 2019-12-24 | 積層体 |
CN201980077804.2A CN113165326B (zh) | 2018-12-26 | 2019-12-24 | 层叠体 |
KR1020217013695A KR102498697B1 (ko) | 2018-12-26 | 2019-12-24 | 적층체 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018243277 | 2018-12-26 | ||
JP2018-243277 | 2018-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020138104A1 true WO2020138104A1 (ja) | 2020-07-02 |
Family
ID=71129489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/050676 WO2020138104A1 (ja) | 2018-12-26 | 2019-12-24 | 積層体 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7073535B2 (ja) |
KR (1) | KR102498697B1 (ja) |
CN (1) | CN113165326B (ja) |
WO (1) | WO2020138104A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003010399A (ja) * | 2001-06-27 | 2003-01-14 | Hiroyuki Nishimuta | 入賞変動型スロットゲーム機 |
WO2009075086A1 (ja) * | 2007-12-10 | 2009-06-18 | Nissha Pringing Co., Ltd. | 耐箔バリ性に優れた転写材の製造方法と転写材 |
JP2015143308A (ja) * | 2014-01-31 | 2015-08-06 | リンテック株式会社 | 剥離シートおよび転写シート |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1067199A (ja) | 1996-08-28 | 1998-03-10 | Dainippon Printing Co Ltd | 転写シート基材の剥離を容易にした転写方法 |
JP2003103997A (ja) | 2001-09-28 | 2003-04-09 | Nissha Printing Co Ltd | 箔バリ防止転写材 |
JP2009083166A (ja) * | 2007-09-28 | 2009-04-23 | Dainippon Printing Co Ltd | 熱転写シート |
CN101998908B (zh) * | 2008-08-13 | 2012-12-19 | 日本写真印刷株式会社 | 在不发生箔剥离的未加工转印箔上使用的剥离膜以及未加工转印箔 |
US20120231228A1 (en) | 2009-12-03 | 2012-09-13 | Toray Industries, Inc. | Donor substrate, patterning method, and method for producing device |
JP5941832B2 (ja) | 2012-10-04 | 2016-06-29 | 富士フイルム株式会社 | 光学フィルム、位相差フィルム、偏光板及び液晶表示装置 |
JP6086607B2 (ja) | 2013-05-29 | 2017-03-01 | 富士フイルム株式会社 | 低透湿性フィルム、光学フィルム、偏光板、及び液晶表示装置、並びに低透湿性フィルムの製造方法 |
JP2015021976A (ja) * | 2013-07-16 | 2015-02-02 | 大日本印刷株式会社 | 光学フィルム用転写体、光学フィルム用転写体の製造方法 |
JP6600618B2 (ja) | 2016-02-05 | 2019-10-30 | 富士フイルム株式会社 | 積層体および液晶表示装置 |
JP6776275B2 (ja) | 2016-02-09 | 2020-10-28 | 株式会社クラレ | 偏光フィルムの製造方法 |
-
2019
- 2019-12-24 CN CN201980077804.2A patent/CN113165326B/zh active Active
- 2019-12-24 JP JP2020563318A patent/JP7073535B2/ja active Active
- 2019-12-24 KR KR1020217013695A patent/KR102498697B1/ko active IP Right Grant
- 2019-12-24 WO PCT/JP2019/050676 patent/WO2020138104A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003010399A (ja) * | 2001-06-27 | 2003-01-14 | Hiroyuki Nishimuta | 入賞変動型スロットゲーム機 |
WO2009075086A1 (ja) * | 2007-12-10 | 2009-06-18 | Nissha Pringing Co., Ltd. | 耐箔バリ性に優れた転写材の製造方法と転写材 |
JP2015143308A (ja) * | 2014-01-31 | 2015-08-06 | リンテック株式会社 | 剥離シートおよび転写シート |
Also Published As
Publication number | Publication date |
---|---|
JP7073535B2 (ja) | 2022-05-23 |
JPWO2020138104A1 (ja) | 2021-10-14 |
CN113165326A (zh) | 2021-07-23 |
KR102498697B1 (ko) | 2023-02-13 |
KR20210074319A (ko) | 2021-06-21 |
CN113165326B (zh) | 2023-03-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7253589B2 (ja) | フレキシブル画像表示装置用粘着剤組成物、フレキシブル画像表示装置用粘着剤層、フレキシブル画像表示装置用積層体、及び、フレキシブル画像表示装置 | |
TW202244226A (zh) | 可撓性圖像顯示裝置用黏著劑層、可撓性圖像顯示裝置用積層體及可撓性圖像顯示裝置 | |
JP5313297B2 (ja) | 活性エネルギー線硬化型接着剤組成物、偏光板、光学フィルムおよび画像表示装置 | |
JP6811549B2 (ja) | 積層フィルム、及び画像表示装置 | |
TWI565976B (zh) | 偏光性積層膜的製造方法及偏光板的製造方法 | |
CN105467652A (zh) | 偏振片、液晶显示装置和有机电致发光显示装置 | |
TW200937365A (en) | Process for producing optical display panel | |
KR102091095B1 (ko) | 적층체 및 액정 표시 장치 | |
JP2012173487A (ja) | 光学フィルム及び光学フィルムの製造方法 | |
TW202043817A (zh) | 積層體以及顯示裝置 | |
TW202214037A (zh) | 顯示裝置及基材積層體 | |
JP6655528B2 (ja) | 偏光板および液晶表示装置 | |
JP6565907B2 (ja) | 複層フィルム及び巻回体 | |
WO2009054519A1 (ja) | 光学表示パネルの製造方法 | |
WO2020138104A1 (ja) | 積層体 | |
JP2012103355A (ja) | 偏光板用保護フィルムの製造方法、偏光板用保護フィルム、複合偏光板、偏光板及び液晶表示装置 | |
JP6488242B2 (ja) | 複層フィルムの積層物 | |
JP6298248B2 (ja) | 活性エネルギー線硬化型接着剤組成物、偏光板、光学フィルムおよび画像表示装置 | |
JP2012173486A (ja) | 光学フィルム及び光学フィルムの製造方法 | |
US20200231770A1 (en) | Optical film, production method, and multilayer film | |
JP2024044454A (ja) | 光学用両面粘着シート | |
TW202040188A (zh) | 積層體以及顯示裝置 | |
WO2017119245A1 (ja) | 偏光板および液晶表示装置 | |
KR20230141649A (ko) | 편광판 | |
JP2022179511A (ja) | 光学積層体及び表示装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19906125 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20217013695 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2020563318 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19906125 Country of ref document: EP Kind code of ref document: A1 |