Classifications

• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • 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
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
  • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
• • 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
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • 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
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/08—Macromolecular additives
• • 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
  • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
  • C09J153/02—Vinyl aromatic monomers and conjugated dienes
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K50/00—Organic light-emitting devices
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• • 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
  • B32B2457/00—Electrical equipment
  • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Definitions

• the present invention relates to a laminated film having an excellent balance of initial adhesive force to the surface of an optical sheet, suppression of adhesive promotion, suppression of floating after heating, and suppression of contamination of an adherend, and a method for producing the same.
• a typical material for protecting the surface is a protective film.
• a laminated film having an adhesive layer formed on a supporting base material is used, and the adhesive layer surface is attached to an adherend and coated with the supporting base material. This protects the surface.
• these laminated films are required to have an appropriately strong adhesive force between the adhesive layer and the adherend. This moderate strength is such that it does not spontaneously peel off or fall off due to light vibration or impact, and when peeling off, it can be peeled off smoothly without leaving an adhesive layer on the surface of the adherend. It refers to strength.
• liquid crystal displays and touch panel devices have become widespread, and these are composed of a large number of members such as optical sheets made of synthetic resin. Since it is necessary to reduce defects such as optical distortion as much as possible in such an optical sheet, a protective film is often used in order to prevent scratches and stains that may cause the defects.
• the characteristics required for the protective film are that it does not easily peel off from the adherend due to environmental changes such as temperature and humidity or the degree of small stress, and that the adherend and the adhesive layer are affected by external factors such as time and temperature.
• optical sheets for example, a diffuser plate, a prism sheet, and a member having irregularities on the surface such as a diffusion surface having various shapes formed on the back surface of the prism sheet, immediately after the protective film is attached.
• the adhesive layer does not follow the uneven portion sufficiently, and the desired adhesive force cannot be obtained, resulting in peeling.
• a method of softening the adhesive layer and a method of increasing the adhesive strength by using a tackifier are known.
• Patent Document 1 describes an adhesive resin composition and a protective film using the same.
• this protective film is partially peeled off (sometimes referred to as floating) when it is heated after being attached to the adherend, so it is necessary to contain a large amount of tackifier, and it is sticky. If a large amount of the imparting agent is contained in the adhesive layer, the adhesive layer tends to remain on the surface of the adherend when the adhesive film is peeled off, and as a result, there is a problem that the adherend is contaminated by the adhesive layer.
• Patent Document 2 describes a pressure-sensitive adhesive containing a copolymer or a hydrogenated product thereof (hereinafter, hydrogenation may be referred to as hydrogenation) and a fatty acid amide having an acid value of 1 to 7.
• hydrogenation may be referred to as hydrogenation
• fatty acid amide having an acid value of 1 to 7.
• Compositions and surface protective films are described. However, after bonding with the adherend, it partially peels off when heated, and fatty acid amide bleeds out (a phenomenon in which the additives used in manufacturing the film emerge on the surface of the film over time). As a result, there is a problem that the process, the film-formed surface protective film, and the adherend to be bonded are also contaminated.
• An object of the present invention is to solve the above-mentioned problems. That is, it is an object of the present invention to provide a laminated film having a highly excellent balance of initial adhesive force on the surface of an optical sheet, suppression of adhesive promotion, suppression of floating after heating, and suppression of contamination of an adherend.
• the hydrogenated copolymer composition is composed of a polymer block mainly composed of a vinyl aromatic monomer unit and a polymer block mainly composed of a conjugated diene monomer unit, and a single amount of conjugated diene at the terminal. There is a polymer block mainly composed of a body unit.
• the content of the vinyl aromatic monomer unit in the entire hydrogenated copolymer composition is 5 to 30% by weight.
• the melt flow rate of the hydrogenated copolymer composition is 3 to 30 g / 10 minutes. Further, a method for producing a laminated film, wherein the base material layer (a) and the resin layer (b) are formed by melt coextrusion.
• each monomer unit constituting the copolymer shall be in accordance with the naming of the monomer from which the monomer unit is derived.
• the "vinyl aromatic monomer unit” means a constituent unit of a polymer produced as a result of polymerizing a vinyl aromatic compound which is a monomer.
• the vinyl aromatic monomer unit is a vinyl group of a vinyl aromatic compound and is bonded to another monomer unit.
• conjugated diene monomer unit means a constituent unit of a polymer produced as a result of polymerizing a conjugated diene compound which is a monomer.
• the conjugated diene monomer unit is either one of the two double bonds of the conjugated diene compound bound to the other monomeric unit (1,2-bond or 3,4-bond), or 2 of the conjugated diene compound. Both of the two double bonds are bound to other monomeric units (1,4-bonds).
• the "vinyl aromatic compound" constituting the "vinyl aromatic monomer unit” is not limited to the following, but is, for example, styrene, ⁇ -methylstyrene, p-methylstyrene, divinylbenzene, 1, Examples thereof include 1-diphenylethylene, N, N-dimethyl-p-aminoethylstyrene, N, N-diethyl-p-aminoethylstyrene and the like.
• styrene, ⁇ -methylstyrene, and p-methylstyrene are preferable from the viewpoint of availability and productivity. Of these, styrene is particularly preferable. Only one of these may be used alone, or two or more thereof may be used in combination.
• the "conjugated diene compound" constituting the “conjugated diene monomer unit” is a diolefin having a pair of conjugated double bonds.
• the conjugated diene compound is not limited to the following, and is, for example, 1,3-butadiene, 2-methyl-1,3-butadiene (isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene. , 2-Methyl-1,3-pentadiene, 1,3-hexadiene, and farnesene.
• Preferred diolefins include 1,3-butadiene, and isoprene. Only one of these may be used alone, or two or more thereof may be used in combination.
• a coupling agent is preferably used for the hydrogenated copolymer composition, and the coupling agent is a polyfunctional compound that radially binds the linear vinyl aromatic copolymer.
• the coupling agent is not particularly limited, and examples thereof include a polyalkenyl coupling agent and the like. Suitable polyalkenyl coupling agents include, for example, divinylbenzene, with m-divinylbenzene being preferred.
• tetraalkoxysilane such as tetraethoxysilane and tetramethoxysilane
• alkyltrialkoxysilane such as methyltrimethoxysilane
• dialkyldialkoxysilane such as dimethyldimethoxysilane
• ethyl benzoate and methyl benzoate.
• carboxylic acid ester compounds such as, and diglycidyl aromatic epoxy compounds such as diglycidyl ether derived from the reaction of bisphenol A with epichlorohydrin.
• the hydrogenated copolymer composition in the present invention comprises a polymer block mainly composed of a vinyl aromatic monomer unit and a polymer block mainly composed of a conjugated diene monomer unit, and a conjugated diene monomer at the terminal.
• a polymer block mainly composed of a body unit that is, when the polymer block mainly composed of a vinyl aromatic monomer unit is A and the polymer block mainly composed of a conjugated diene monomer unit is B, the polymer block has a structural formula of BAB. Is.
• X is a residue of the coupling agent used.
• the content of the vinyl aromatic monomer unit in the hydrogenated copolymer composition in the present invention is 5 to 30% by weight, preferably 6 to 20% by weight, based on the composition. It is preferably 8 to 12% by weight. If the content of the vinyl aromatic monomer unit exceeds 30% by weight, the initial adhesive strength is lowered, and if the content of the vinyl aromatic monomer unit is less than 5% by weight, the adhesion is deteriorated or contaminated. Will get worse.
• the content of the vinyl aromatic monomer unit in the hydrogenated copolymer composition in the present invention can be measured by an ultraviolet spectrophotometer as described in Examples described later. Since the content of the vinyl aromatic monomer unit is almost the same before and after hydrogenation, it may be grasped by the content of the vinyl aromatic monomer unit in the copolymer before hydrogenation.
• the ratio of double bonds of the conjugated diene monomer unit contained in the hydrogenated copolymer composition in the present invention (hereinafter, may be referred to as hydrogenation ratio) is preferably 81 mol% or more, more preferably 85 mol%. The above is more preferably 90 mol% or more. If it is less than 81 mol%, the adhesion is increased and adhesive residue may be generated on the adherend.
• the hydrogenation rate can be controlled, for example, by adjusting the amount of catalyst and the amount of hydrogen feed during hydrogenation.
• the hydrogenation rate can be controlled, for example, by adjusting the amount of catalyst, the amount of hydrogen feed, the pressure, the temperature, etc. at the time of hydrogenation. Further, the hydrogenation rate can be measured by the method described in Examples described later.
• the melt flow rate of the hydrogenated copolymer composition in the present invention (hereinafter, may be abbreviated as "MFR"; conforming to ISO 1133) is under the conditions of a temperature of 230 ° C. and a load of 21.17 N (2.16 kgf). It is 3 to 30 g / 10 minutes, preferably 5 to 20 g / 10 minutes, and more preferably 6 to 16 g / 10 minutes. When the MFR exceeds 30 g / 10 minutes, the initial adhesive strength becomes strong, the adhesive advancement is large, and adhesive residue is also generated. If the MFR is less than 3 g / 10 minutes, floating will occur after heating.
• the MFR of the hydrogenated copolymer composition can be controlled by adjusting the polymerization conditions such as the amount of monomer added, the polymerization time, the temperature, and the polymerization initiator, and is measured by the method described in Examples described later. can do.
• the resin layer (b) in the present invention contains a tackifier resin for the purpose of improving the initial adhesive strength.
• the resin as long as it can impart viscosity to the laminated film of the present invention is not particularly limited, and for example, an aliphatic petroleum resin, an aromatic petroleum resin, an aliphatic / aromatic petroleum resin, and an alicyclic system. It is preferably at least one resin selected from the group consisting of petroleum resin, terpene resin, terpene phenol resin, rosin resin, alkylphenol resin and xylene resin. It is also possible to use hydrogenated hydrogenated compounds for these unsaturated bonds.
• it is an aliphatic petroleum resin, an aromatic petroleum resin, an aliphatic / aromatic petroleum resin, an alicyclic petroleum resin, a terpene resin, a terpene phenolic resin, and most preferably an aromatic petroleum resin.
• Terpene phenolic resin is an aromatic petroleum resin, an aromatic petroleum resin, an aliphatic / aromatic petroleum resin, an alicyclic petroleum resin, a terpene resin, a terpene phenolic resin, and most preferably an aromatic petroleum resin.
• Terpene phenolic resin Terpene phenolic resin.
• the tackifier resin only one type may be used alone, or two or more types may be mixed and used.
• the content of the tackifier resin in the resin composition of the resin layer (b) in the present invention is preferably 3 to 30% by weight, more preferably 5 to 20% by weight. If the content of the tackifier resin is less than 3% by weight, the desired initial adhesive strength cannot be obtained, and if it exceeds 30% by weight, the adhesive strength increases and adhesive residue is generated on the adherend. It ends up.
• the resin composition of the resin layer (b) in the present invention is a hydrogenated styrene-based elastomer having a structure other than the specific hydrogenated copolymer composition in the present invention described above with respect to the resin composition of the resin layer (b). It may be further contained up to 50% by weight.
• the hydrogenated styrene-based elastomer is not limited to the following, but for example, styrene / butadiene copolymer (SBR), styrene / isoprene / styrene copolymer (SIS), styrene / butadiene / styrene copolymer weight.
• SBR styrene / butadiene copolymer
• SIS isoprene / styrene copolymer
• styrene / butadiene / styrene copolymer weight is not limited to the following, but for example, styrene / butadiene copolymer (SBR), styrene / isoprene / styrene copolymer (SIS), styrene / butadiene / styrene copolymer weight.
• Styrene-conjugated diene copolymers such as coalescence (SBS) and their hydrogenated products (eg, hydrogenated styrene-butadiene copolymer (HSBR) and styrene-ethylene-butylene-styrene copolymer (SEBS)), Styrene-isobutylene-based copolymers (for example, styrene-isobutylene-styrene triblock copolymer (SIBS), styrene-isobutyrene block copolymer (SIB), or mixtures thereof) are typical hydrogenated styrene-based elastomers. Is listed as.
• Stabilizers such as antioxidants and light stabilizers may be added to the resin composition of the resin layer (b) in the present invention.
• various additives may be added as needed.
• the additive is not limited to the following, but is, for example, pigments such as red iron oxide and titanium dioxide, waxes such as paraffin wax, microcrystallin wax, low molecular weight polyethylene wax, amorphous polyolefin, and ethylene / ethyl acrylate.
• Polyolefin-based or low-molecular-weight vinyl aromatic thermoplastic resins such as copolymers, natural rubber, polyisoprene rubber, polybutadiene rubber, styrene-butadiene rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, isoprene-isobutylene rubber, Examples thereof include synthetic rubber such as polypentenemer rubber.
• synthetic rubber examples include those described in "Rubber / Plastic Blended Chemicals” (edited by Rubber Digest Co., Ltd.).
• the resin layer (b) in the present invention is laminated and formed on the base material layer (a) as a resin composition composed of the above-mentioned specific hydrogenated copolymer composition and tackifier resin in the present invention.
• the thickness of the resin layer (b) in the present invention is preferably 1 ⁇ m or more and 30 ⁇ m or less, and more preferably 2 ⁇ m or more and 20 ⁇ m or less. If the thickness of the resin layer (b) exceeds 30 ⁇ m, the productivity will not be stable, and if it is less than 1 ⁇ m, the adhesion to the adherend may deteriorate.
• the material of the base material layer (a) in the present invention is not particularly limited, and either a non-polar resin or a polar resin can be used.
• a polyolefin-based resin is preferable as the non-polar resin from the viewpoint of performance and price.
• the polyolefin-based resin contained in the base material is not particularly limited, but includes ethylene homopolymers, ethylene / ⁇ -olefin copolymers, ethylene / (meth) acrylic acid copolymers, and ethylene / (meth) acrylic acid esters.
• Polymers and polyethylene resins such as ethylene / vinyl acetate copolymers, propylene homopolymers, propylene / ⁇ -olefin copolymers, and polypropylene resins such as propylene / ethylene copolymers, butene homopolymers, butadiene And homopolymers or copolymers of conjugated diene such as isoprene.
• polyethylene-based resin include high-density polyethylene, medium-density polyethylene, and low-density polyethylene.
• the form of the copolymer may be random, block, or ternary copolymer.
• the above-mentioned polyolefin resin may be used alone or in combination of two or more.
• the polyethylene-based resin is obtained by using ethylene as a main component.
• the proportion of the structural unit derived from ethylene is preferably 50% by weight or more, more preferably 70% by weight or more, still more preferably 90% by weight or more, based on 100% by weight of all the structural units of the polyethylene resin.
• the polypropylene-based resin is obtained by using propylene as a main component.
• the proportion of the structural unit derived from propylene is preferably 50% by weight or more, more preferably 70% by weight or more, still more preferably 90% by weight or more, based on 100% by weight of all the structural units of the polypropylene resin.
• the base material layer (a) in the present invention is mainly made of a polypropylene resin in terms of heat resistance, weatherability, and adhesion to the resin layer (b).
• the thickness of the base material layer (a) in the present invention is preferably 10 ⁇ m or more and 150 ⁇ m or less, more preferably 15 ⁇ m or more and 80 ⁇ m or less, and most preferably 20 ⁇ m or more and 50 ⁇ m or less.
• the base material layer is used to suppress the adhesive force between the surface of the base material layer (a) and the surface of the resin layer (b). It is preferable to impart irregularities to the surface of (a) to reduce the contact area with the resin layer (b).
• an incompatible resin with the resin used for the base material layer (a) can be added, or organic or inorganic particles can be blended.
• an ⁇ -olefin polymer having 4 or more carbon atoms such as a 4-methylpentene-1 polymer may be used as the incompatible resin. It can.
• organic particles examples include polyethylene, polystyrene, polymethylmethacrylate, etc.
• polyethylene-based particles include high-molecular-weight polyethylene fine particles "Miperon” manufactured by Mitsui Chemicals Co., Ltd. and crosslinked acrylic monodisperse manufactured by Soken Chemical Co., Ltd. Particle MX-1500H is exemplified.
• inorganic particles include silica and titanium oxide.
• silicone-based mold release agents include "Ixfora” manufactured by Mitsui Kagaku Fine Co., Ltd., BY27-201C and BY27-202H manufactured by Dow Toray Co., Ltd., and Momentive Performance Materials Japan. Examples thereof include company-made parlane Y19220 and SiPP MB01.
• laminating the second resin layer (c) on the other surface of the base material layer (a) suppresses the adhesion between the resin layer (b) and the second resin layer (c). It is preferable for this.
• the material constituting the second resin layer (c) in the present invention is not particularly limited, but is preferably the same composition as the base material layer (a), and the second resin layer (c) has the above-mentioned non-phase. It is preferable to add a molten resin, organic or inorganic particles, a mold release agent, etc. from the viewpoint of productivity, cost, and mold release effect.
• the thickness of the second resin layer (c) in the present invention is preferably 1 ⁇ m or more and 20 ⁇ m or less. If the thickness of the second resin layer (c) is less than 1 ⁇ m, the processability at the time of film formation is inferior, and if it exceeds 20 ⁇ m, the cost of the laminated film tends to increase.
• the method for producing the laminated film of the present invention is not particularly limited, but for example, in the case of a three-layer laminated structure of a resin layer (b), a base material layer (a), and a second resin layer (c), each of them is configured.
• the so-called coextrusion method in which the resin composition is melt-extruded from individual extruders and laminated and integrated in the mouthpiece, and the resin layer (b), the base material layer (a), and the second resin layer (c) are individually extruded. Examples thereof include a method of laminating by a laminating method after melt extrusion. From the viewpoint of productivity, it is preferably produced by the coextrusion method.
• a material mixed with Henschel mixer or the like may be used, or a material obtained by kneading all or a part of the materials of each layer in advance may be used.
• the coextrusion method known methods such as an inflation method and a T-die method are used, but the Fused Deposition Modeling coextrusion method by the T-die method is particularly preferable from the viewpoint of excellent thickness accuracy and surface shape control.
• the laminated film of the present invention can be used as a surface protective film for manufacturing, processing, transporting a synthetic resin plate, a metal plate, a glass plate, etc. to prevent scratches and stains, and can be used, for example, a diffuser plate or a prism. It is preferably used as an optical surface protective film having irregularities on the surface of a sheet or the like.
• Measurement condition Measuring equipment: JNM-LA400 (manufactured by JEOL)
• Solvent Deuterated cloform Measurement sample: Sample concentration before and after hydrogenation of polymer Sample concentration: 50 mg / mL Observation frequency: 400MHz
• MFR Melt flow rate
• Adhesive strength (initial) Excellent: 10 mN / 25 mm or more, less than 100 mN / 25 mm Good: 100 mN / 25 mm or more, less than 300 mN / 25 mm Defective: less than 10 mN / 25 mm, 300 mN / 25 mm or more.
• Adhesive strength over time (adhesive progress)
• Each laminated film was attached to the lens surface of the prism sheet so as to cover the lens surface in the same manner as in the above (4) initial adhesive strength test. Then, it was stored in a hot air oven whose temperature was controlled to 50 ° C. for 72 hours, and further stored at a temperature of 23 ° C. and a relative humidity of 50% for 24 hours, and then the adhesive strength was evaluated.
• Adhesive rate (%) (adhesive force over time / initial adhesive force) x 100 (%) (Criteria) Adhesive rate Excellent: 80% or more, less than 150% Good: 150% or more, less than 250% Defective: 250% or more.
• a coupling agent tetraethoxysilane
• tetraethoxysilane is added to crosslink a part of the butadiene-styrene-butadiene copolymer, and a mixture of the butadiene-styrene-butadiene copolymer and the crosslinked product (copolymer). Composition) was obtained.
• Example 1 As a hydrogenated copolymer composition, the hydrogenated product 1 obtained in the production example was dry-blended to 85% by weight with the aromatic hydrocarbon resin "FTR" 8100 manufactured by Mitsui Chemicals Co., Ltd. at a ratio of 15% by weight. The resin layer (b) was used.
• FRR aromatic hydrocarbon resin
• Prime Polypro F113G manufactured by Prime Polymer Co., Ltd., which is an isotactic polypropylene (homopolypropylene) having an MFR of 3.0 g / 10 minutes, was used.
• the resin layer (b) side is cast so as to be in contact with a metal cooling roll whose temperature is controlled to 30 ° C., and the resin layer (b) is cooled and solidified to form a film.
• a laminated film having a thickness of 36 ⁇ m and an overall thickness of 40 ⁇ m was obtained.
• Example 2 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 2: 85% by weight -"FTR" 8100: 15% by weight.
• Example 3 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 3: 85% by weight -"FTR" 8100: 15% by weight.
• Example 4 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 4: 85% by weight -"FTR" 8100: 15% by weight.
• Example 5 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 5: 85% by weight -"FTR" 8100: 15% by weight.
• Example 6 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows.
• -Hydrogenated product obtained in the production example 1 85% by weight -Terpene phenol resin YS Polystar TH130: 15% by weight manufactured by Yasuhara Chemical Co., Ltd.
• Example 7 A laminated film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the thickness of the resin layer (b) of Example 1 was changed to 25 ⁇ m and the thickness of the base material layer (a) was changed to 15 ⁇ m.
• Example 8 A laminated film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the thickness of the resin layer (b) of Example 1 was changed to 2 ⁇ m and the thickness of the base material layer (a) was changed to 38 ⁇ m.
• Example 9 In addition to the composition shown in Example 1, the composition shown below was used as the second resin layer (c) on the opposite surface on which the resin layer (b) of the base material layer (a) was formed, and the compression ratio was 4 .2,
• a three-layer laminated film having a total thickness of 36 ⁇ m and an overall thickness of 40 ⁇ m of the base material layer (a) and the second resin layer (c) was obtained.
• Comparative Example 1 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 6: 85% by weight -"FTR" 8100: 15% by weight.
• Example 2 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 7: 85% by weight -"FTR" 8100: 15% by weight.
• Example 3 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 8: 85% by weight -"FTR" 8100: 15% by weight.
• Example 4 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 9: 85% by weight -"FTR" 8100: 15% by weight.
• Example 5 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -Hydrogenated product obtained in the production example 1: 100% by weight.
• Example 6 A film having an overall thickness of 40 ⁇ m was obtained in the same manner as in Example 1 except that the composition of the resin layer (b) of Example 1 was changed as follows. -JSR Co., Ltd. hydrogenated styrene-butadiene rubber "DYNARON" 1321P (hydrogenated copolymer having no butadiene monomer at the end): 85% by weight -"FTR" 8100: 15% by weight.
• Examples 1 to 8 were highly excellent in the balance between the initial adhesive force against the surface of the optical sheet, the suppression of adhesive promotion, the suppression of floating after heating, and the suppression of contamination of the adherend.
• Comparative Examples 1, 4, 5 and 6 when the laminated film was heated after being bonded to the adherend, the laminated film was lifted and the film was peeled off.
• Comparative Examples 2 and 3 when the adhesive is heated after being bonded to the adherend, the adhesion is increased, the adhesive remains on the surface of the adherend, and the adhesive remains (contaminated) on the surface of the adherend. There was a problem.
• the laminated film of the present invention is used not only as a surface protective film for preventing scratches and stains on an adherend having irregularities on the surface, but also as a surface protective film for various products made of various materials such as synthetic resin, metal, and glass. It can be preferably used.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Laminated Bodies (AREA)
• Adhesives Or Adhesive Processes (AREA)

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• 2020
  • 2020-08-20 WO PCT/JP2020/031412 patent/WO2021054030A1/ja active Application Filing
  • 2020-08-20 KR KR1020227005181A patent/KR20220061954A/ko unknown
  • 2020-08-20 CN CN202080061628.6A patent/CN114302932B/zh active Active
  • 2020-08-20 JP JP2020544677A patent/JPWO2021054030A1/ja active Pending
  • 2020-09-01 TW TW109129837A patent/TW202128437A/zh unknown

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