Laminate

Abstract

To provide a laminate capable of preventing a varnish layer from setting off to a closely-attached substrate film surface when rolling up the laminate, and a laminate capable of preventing the varnish layer from setting off to a printed layer of the closely-attached substrate film surface by providing an aqueous varnish layer on an aqueous mat layer formed on one face side of a substrate film to make a laminate.SOLUTION: In a laminate, a mat layer, and a varnish layer containing an aqueous acrylic resin layer are laminated in this order on one face side of a substrate film, and the mat layer contains one or more selected from the group consisting of an aqueous acrylic resin, an aqueous urethane-based resin, and an aqueous acrylic urethane resin, and a matting agent.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a laminate.

Background Art

[0002] In order to impart a matte feeling to the surface side of an article such as a resin molded product, a coating liquid containing a matting agent is applied to the surface side of the article. Conventionally, organic solvent-based coating liquids have been used, but from the viewpoint of reducing the environmental load, water-based conversion has been promoted. Patent Document 1 discloses a surface-treated article obtained by applying an aqueous surface treatment agent containing an aqueous polyurethane having a carboxyl group and / or a hydroxyl group, a polyolefin wax having a melting range of 140 to 180°C, a crosslinking agent, and a matting agent to the surface side of an article. Patent Document 2 discloses a surface-treated article obtained by applying an aqueous surface treatment agent containing an aqueous polyurethane, an acid-modified non-chlorinated polyolefin, a matting agent, and a crosslinking agent to the surface side of an article. Patent Document 3 discloses a surface-treated article obtained by printing an aqueous ink composition for surface coating, which contains at least one selected from the group consisting of an aqueous urethane resin, an aqueous acrylic resin, and an aqueous acrylic urethane resin as a binder resin, a matting agent, and a extender pigment and organic particles, and having an average particle diameter of the group of organic particles of 0.1 to 30 μm, on the surface side of an article.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] When forming a matte layer by applying and printing a conventional aqueous matte coating agent on a base film, when winding up the base film after applying and printing the aqueous matte coating agent, the matte layer may adhere to the opposite side (the side without matte processing) of the base film, and the matte layer may shift to the back side. In particular, when a printing ink layer, a functional varnish layer, etc. were formed on the opposite side of the base film, it was likely to shift to the back side. The problem to be solved by the present invention is that by providing a varnish layer on top of a matte layer formed by applying and printing an aqueous matte coating agent on one side of a base film to form a laminate, when winding up the laminate, a laminate that can prevent the varnish layer from shifting to the back side on the surface side of the adhered base film, and a laminate that can prevent the varnish layer from shifting to the back side on a printing ink layer or a functional varnish layer formed on the surface side of the adhered base film, are provided.

Means for Solving the Problem

[0005] The present invention relates to a laminate shown below. 1. On one side of a base film, a matte layer and a varnish layer containing an aqueous acrylic resin are laminated in this order, The matte layer is a laminate containing one or more selected from an aqueous acrylic resin, an aqueous urethane resin, and an aqueous acrylic urethane resin, and a matting agent. 2. The matting agent is one or more selected from organic particles and inorganic particles, and the laminate according to 1, wherein the average particle diameter thereof is 0.1 μm to 30 μm. 3. The aqueous acrylic resin contained in the varnish layer has a glass transition temperature of -30°C or higher and 120°C or lower, in the laminate according to 1 or 2. 4. On the other side of the base film, the laminate according to any one of 1 to 3, which has a layer other than the matte layer or the varnish layer. 5. On the other side of the base film, the laminate according to any one of 1 to 4, which has a printing layer and / or a varnish layer. 6. The laminate according to any one of 1 to 5, wherein the aqueous matte coating agent for forming the matte layer and / or the varnish agent for forming the varnish layer contains a crosslinking agent. 7. The laminate according to 6, wherein the crosslinking agent is at least one selected from aziridine-based, epoxy-based, carbodiimide-based, and isocyanate-based crosslinking agents.

Advantages of the Invention

[0006] The present invention is a laminate in which a mat layer and a varnish layer are laminated in this order on one surface side of a base film. The mat layer contains one or more binder resins selected from aqueous acrylic resins, aqueous urethane resins, and aqueous acrylic urethane resins, and a matting agent. The varnish layer provided on the mat layer contains an aqueous acrylic resin. And when this laminate is stacked, it has the effect of providing a laminate that can prevent reverse transfer.

Brief Description of the Drawings

[0007]

Figure 1

Embodiments for Carrying Out the Invention

[0008] A laminate obtained by laminating a mat layer and a varnish layer in this order on one surface side of the base film of the present invention will be described. <Base Film> As the base film, those conventionally used as the base film of a packaging film can be used. And polyolefin films such as polyethylene and polypropylene, polyester films such as polyethylene terephthalate, polylactic acid, and polycaprolactone, and various resin films such as nylon and vinylon can be used. It may be composed of a single layer or formed of a plurality of layers. Also, a film provided with a metal vapor deposition layer or a printing layer on one surface side and / or the other surface side of the base film may be used. When a metal vapor deposition layer or a printing layer is provided on the other surface side of the base film, when the laminate of the present invention is wound, the metal vapor deposition layer or the printing layer provided on the other surface side and the above varnish layer are in close contact. On one side and / or the other side of the base film, surface treatment such as corona discharge treatment may be performed, or such surface treatment may not be performed.

[0009] <Mat layer> The mat layer is a layer containing at least one binder resin selected from aqueous acrylic resins, aqueous urethane resins, and aqueous acrylic urethane resins, and a matting agent. To form this mat layer, an aqueous mat coating agent containing at least one binder resin emulsion selected from aqueous acrylic resin emulsions, aqueous urethane resin emulsions, and aqueous acrylic urethane resin emulsions, a matting agent, and an aqueous medium is applied or printed. This aqueous mat coating agent may crosslink the formed mat layer by containing a crosslinking agent. Or, without containing a crosslinking agent, the mat layer may not be crosslinked.

[0010] An aqueous mat coating agent containing at least one binder resin emulsion selected from aqueous acrylic resin emulsions, aqueous urethane resin emulsions, and aqueous acrylic urethane resin emulsions, a matting agent, and an aqueous medium will be described. (Binder resin emulsion) As the above binder resin emulsion, at least one selected from aqueous acrylic resin emulsions, aqueous urethane resin emulsions, and aqueous acrylic urethane resin emulsions can be used.

[0011] ·Aqueous acrylic resin emulsion The aqueous acrylic resin emulsion is not particularly limited as long as it is an aqueous acrylic resin emulsion in which the aqueous acrylic resin is stably dispersed in a particulate state. The aqueous acrylic resin of the aqueous acrylic resin emulsion can use ethylene / vinyl acetate / (meth)acrylic acid derivative copolymer, ethylene / (meth)acrylic acid derivative copolymer, poly(meth)acrylic acid derivative, styrene / (meth)acrylic acid derivative copolymer, vinyl acetate / (meth)acrylic acid derivative, etc. The (meth)acrylic acid derivative is a derivative such as acrylic acid and / or methacrylic acid, and esters thereof.

[0012] (Meth)acrylic acid derivatives include acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, etc. The acid value of the aqueous acrylic resin is not particularly limited. In particular, 10 mgKOH / g or more is preferable, and 20 mgKOH / g or more is more preferable. Also, 180 mgKOH / g or less is preferable, and 100 mgKOH / g or less is more preferable. When the acid value is within the above range, the dispersion stability is excellent when the aqueous acrylic resin is made into an emulsion. This acid value is the theoretical acid value obtained arithmetically by calculating the number of milligrams of potassium hydroxide theoretically required to neutralize 1 g of the aqueous acrylic resin based on the composition of the monomers used to synthesize the aqueous acrylic resin. The glass transition temperature (Tg) of the aqueous acrylic resin is preferably -30 to 150°C, and more preferably -25 to 120°C.

[0013] The production method of the aqueous acrylic resin emulsion is not particularly limited. For example, the aqueous acrylic resin emulsion can be obtained by a known production method. For example, in the presence of an emulsifier, using a polymerization initiator, it can be produced by a method such as emulsion polymerization of polymerizable monomers that are raw materials of the synthetic resin in water or a water-containing solvent. The emulsifier is not particularly limited. For example, the emulsifier is an anionic, nonionic, cationic or amphoteric surfactant, a protective colloid such as polyvinyl alcohol, or the like. The solid content of the aqueous acrylic resin emulsion contained in the aqueous matte coating agent is not particularly limited. For example, the content of the aqueous acrylic resin in the aqueous matte coating agent is preferably 10.0 to 40.0% by mass, more preferably 15.0 to 35.0% by mass.

[0014] · Aqueous urethane resin emulsion The aqueous urethane resin emulsion refers to a resin liquid in which the aqueous urethane resin is stably dispersed in a particulate state. The aqueous urethane resin emulsion is a resin emulsion such as a polyester-based urethane, a polyether-based urethane, or a polycarbonate-based urethane. The acid value of the aqueous urethane resin is not particularly limited. For example, the acid value is preferably 10 mgKOH / g or more, more preferably 20 mgKOH / g or more. Also, the acid value is preferably 60 mgKOH / g or less, more preferably 50 mgKOH / g or less. When the acid value is within the above range, the dispersion stability is excellent when the aqueous acrylic resin is made into an emulsion. The solid content of the aqueous urethane resin emulsion in the aqueous matte coating agent is not particularly limited. For example, the solid content of the aqueous urethane resin in the aqueous matte coating agent is preferably 10.0 to 40.0% by mass, more preferably 15.0 to 35.0% by mass.

[0015] · Aqueous acrylic urethane resin emulsion An aqueous acrylic urethane resin emulsion refers to a resin liquid in which an aqueous acrylic urethane resin is stably dispersed in particulate form. The aqueous acrylic urethane resin is a resin containing an acrylic resin part and a urethane resin part. The resin containing an acrylic resin part and a urethane resin part may be an alternating copolymer of acrylic units and urethane units, or a urethane resin may be bonded as a side chain to the acrylic resin constituting the main chain, or an acrylic resin may be bonded as a side chain to the urethane resin constituting the main chain. For example, it can be produced by referring to the methods described in JP-A-4-103614, JP-A-10-139839, etc. The acid value of the aqueous acrylic urethane resin is not particularly limited. By way of example, the acid value is preferably 5 mgKOH / g or more, more preferably 25 mgKOH / g or more. Also, the acid value is preferably 100 mgKOH / g or less, more preferably 80 mgKOH / g or less. When the acid value is within the above range, the dispersion stability is excellent when the aqueous acrylic resin is made into an emulsion. The solid content of the aqueous acrylic urethane resin emulsion contained in the aqueous matte coating agent is not particularly limited. By way of example, the solid content of the aqueous acrylic urethane resin emulsion in the aqueous matte coating agent is preferably 10.0 to 40.0% by mass, more preferably 15.0 to 35.0% by mass. The total solid content of the binder resin contained in the aqueous matte coating agent is preferably 10.0 to 40.0% by mass, more preferably 15.0 to 35.0% by mass. Binder resins other than the binder resin emulsion can also be used in combination within a range where the performance does not deteriorate.

[0016] (Matting agent) The matting agent is for forming fine irregularities on the surface of the mat layer as a result of applying and drying an aqueous mat coating agent containing the matting agent on a base film to form a mat layer. The matting agent can be used without limitation as long as it is a material that diffusely reflects light or a material that makes the mat layer semi-transparent and weakens the reflected light. For example, it can be selected from organic particles, inorganic particles, etc. At least one kind of matting agent may be used, or two or more kinds may be used.

[0017] As the organic particles, those made of a material having good adhesiveness to the above binder resin or those that can obtain a desired dull feeling with a smaller amount are preferable. For example, particles such as acrylic resins, epoxy resins, silicone resins, nylon resins, polyethylene resins, benzoguanamine resins, waxes, etc. can be mentioned. As the inorganic particles, those that can obtain a desired dull feeling with a smaller amount are preferable. For example, particles such as calcium carbonate, calcium silicate, magnesium silicate, silica, barium sulfate, zinc oxide, titanium oxide, clay, alumina, etc. can be mentioned. The average particle diameter of the organic particles and inorganic particles is preferably about 0.1 to 30 μm. This average particle diameter is the volume-based cumulative 50% particle diameter (median diameter) determined by a laser diffraction particle size distribution measuring device.

[0018] The concentration of the matting agent with respect to the total solid content of the aqueous mat coating agent is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 25% by mass or more. Also, it is preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less. If the concentration of the matting agent is too low, the amount of the matting agent in the mat layer tends to be small, and it may be difficult for the mat layer to have a sufficient mat feeling. If it is 60% by mass or less, it may be difficult to obtain a uniform mat feeling throughout the mat layer. Also, in the mat layer of the laminate of the present invention, the amount (density) of only the above matting agent is preferably 0.10 g / m 2 or more, and 0.15 g / m 2The above is more preferable, 0.20 g / m 2 The above is even more preferable, 0.30 g / m 2 The above is most preferable. 0.10 g / m 2 If it is below this, there is a possibility that the laminate cannot be sufficiently matting.

[0019] (Aqueous medium) The aqueous medium used in the aqueous mat coating agent is not particularly limited. For example, the aqueous medium is water, various water-soluble organic solvents, etc. The water-soluble organic solvent is alcohol and polyhydric alcohol-based solvents, etc., such as methanol, ethanol, propanol, butanol, hexanol, octanol, decanol, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monooctyl ether, diethylene glycol, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, triethylene glycol, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monopropyl ether, triethylene glycol monobutyl ether, propylene glycol, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether, tripropylene glycol monopropyl ether, tripropylene glycol monobutyl ether, glycerin, etc. The content of the aqueous medium is preferably 50.0% by mass or more, more preferably 60.0% by mass or more in the aqueous matte coating agent. Also, the content of the aqueous medium is preferably 90.0% by mass or less, more preferably 80.0% by mass or less in the aqueous matte coating agent. When the content of the aqueous medium is within the above range, the aqueous matte coating agent has an excellent balance between detergency and drying property.

[0020] <Varnish layer> The varnish layer of the present invention is formed by applying or printing a varnish containing an aqueous acrylic resin containing an aqueous medium. As such an aqueous acrylic resin, the same aqueous acrylic resin as the binder resin used in the aqueous matte coating agent for forming the matte layer can be employed. And at least one selected from the above aqueous acrylic resin emulsion, aqueous urethane resin emulsion, and aqueous acrylic urethane resin emulsion and its concentration can be selected independently of the resin contained in the aqueous matte coating agent used for forming the matte layer. And the varnish layer obtained by the varnish contains the resin obtained from each of the above resin emulsions. The aqueous acrylic resin preferably has a glass transition temperature of -30°C or higher and 120°C or lower. The aqueous medium contained in the varnish can be selected from the same ones as the aqueous medium described in the above aqueous matte coating agent. The resin and aqueous medium contained in the varnish may have the same composition as the resin and aqueous medium used in the above aqueous matte coating agent, or may have different compositions. However, the varnish layer does not contain the above matting agent, and the varnish layer itself does not have the function of making its surface uneven. The present invention has the effect of improving the adhesiveness between the layer made of the aqueous matte coating agent and the base film and improving the blocking resistance of the laminate by forming the varnish layer.

[0021] <Crosslinking agent> It is preferable to contain a crosslinking agent in at least one of the above aqueous matte coating agent and varnish. The crosslinking agent is not particularly limited, and examples thereof include aziridine-based crosslinking agents, epoxy-based crosslinking agents, carbodiimide-based crosslinking agents, and isocyanate-based crosslinking agents. Among these crosslinking agents, it is preferable that at least one of them is an epoxy-based crosslinking agent or an aziridine-based crosslinking agent. The mat layer and the varnish layer obtained from these will both have excellent hot water resistance and abrasion resistance.

[0022] When the crosslinking agent is blended in the aqueous mat coating agent and / or the varnish, the content of these crosslinking agents is not particularly limited. The solid content of the crosslinking agent can be appropriately determined depending on the type of the crosslinking agent. And the solid content of the crosslinking agent is preferably 0.5% by mass or more, more preferably 1.0% by mass or more in the aqueous mat coating agent and / or the varnish. Also, the solid content of the crosslinking agent is preferably 6.5% by mass or less, more preferably 6.0% by mass or less in the aqueous mat coating agent and / or the varnish. When the content of the crosslinking agent is within the above range, a coating film excellent in the balance between hot water resistance and whitening property can be obtained.

[0023] The aziridine-based crosslinking agent is not particularly limited. For example, the aziridine-based crosslinking agent is trimethylolpropane tris[3-(1-aziridinyl)propionate], trimethylolpropane tris[3-(1-(2-methyl)aziridinylpropionate)], etc. When the aziridine-based crosslinking agent is used, the solid content of the aziridine-based crosslinking agent is preferably 0.5% by mass or more, more preferably 1.0% by mass or more in the aqueous mat coating agent and / or the varnish. Also, the content of the aziridine-based crosslinking agent is preferably 4.5% by mass or less, more preferably 4.0% by mass or less in the aqueous mat coating agent and / or the varnish. When the content of the aziridine-based crosslinking agent is within the above range, the balance between hot water resistance and whitening property is excellent.

[0024] The epoxy crosslinking agent is not particularly limited. For example, the epoxy crosslinking agent is one having two or more epoxy groups in one molecule, such as N,N,N',N'-tetraglycidyl-m-xylenediamine, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, 1,6-hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, polyglycerol polyglycidyl ether, and the like. When an epoxy crosslinking agent is used, the solid content of the epoxy crosslinking agent is preferably 2.5% by mass or more, more preferably 3.0% by mass or more in the aqueous matte coating agent and / or the varnish. Also, the content of the epoxy crosslinking agent is preferably 6.5% by mass or less, more preferably 6.0% by mass or less in the aqueous matte coating agent and / or the varnish. When the content of the epoxy crosslinking agent is within the above range, the aqueous matte coating agent and the varnish have an excellent balance between heat-resistant water resistance and whitening property.

[0025] The amount of the varnish layer (coating amount after drying) is preferably 0.5 g / m 2 or more, more preferably 0.8 g / m 2 or more. Also, in order to maintain the effect of matting by the matte layer, it is preferably 1.7 g / m 2 or less, more preferably 1.5 g / m 2 or less. If it is less than 0.5 g / m 2 , the blocking resistance of the laminate may become insufficient. In particular, the blocking resistance between the varnish layer and the layer formed by printing or the like may become insufficient. Further, in the matte layer of the laminate of the present invention, the ratio of the coating amount after drying of the varnish to the amount (density) of only the matting agent in the matte layer [(coating amount after drying of the varnish (density (g / m 2 ))) / (the amount of only the above matting agent (density (g / m 2 )))] is 10.0 or less, preferably 8.0 or less, more preferably 5.0 or less, still more preferably 3.0 or less, and most preferably 2.5 or less. Also, in the matte layer of the laminate of the present invention, the amount (density) of only the matting agent is preferably 0.10 g / m 2 or more, preferably 0.15 g / m 2The above is more preferable, 0.20 g / m 2 The above is even more preferable, 0.30 g / m 2 The above is most preferable. 0.10 g / m 2 If it is less than this, there is a possibility that the laminate cannot be sufficiently matting.

[0026] (Optional component) The aqueous matting coating agent and varnish agent in the present invention may contain known additives such as pigments, leveling agents, defoaming agents, waxes, viscosity modifiers, polymerization inhibitors, antiblocking agents, light stabilizers, ultraviolet absorbers, infrared absorbers, thickeners (thixotropic agents), antibacterial and antifungal agents, etc., as long as the effects according to the present invention are not impaired.

[0027] <Method for preparing aqueous matting coating agent and varnish agent> The method for preparing the aqueous matting coating agent and varnish agent in the present invention is not particularly limited. For example, the aqueous matting coating agent and varnish agent can be prepared by adding all the components and stirring and mixing them with a stirring device.

[0028] <Method for manufacturing laminate> The laminate of the present invention can be manufactured by coating an aqueous matting coating agent on one surface side of a base film, drying it, and then further coating a varnish agent and drying it. The coating method is not particularly limited, and known coating methods such as gravure printing, flexographic printing, brush coating, gravure coater method, die coater method, bar coater method, spray coating method, flow coating method, dip coating method, spin coating method, and curtain coating method can be used. As the drying method, there is no particular limitation as long as the aqueous medium of the coated aqueous matting coating agent and varnish agent can be removed. For example, vacuum drying, pressure drying, heat drying, and air drying can be mentioned. The temperature during heating is preferably 30 to 150°C, and more preferably 40 to 100°C.

Examples

[0029] The present invention will be described in more detail below with reference to examples. The present invention is not limited to these examples. Unless otherwise specified, “%” means “mass %” and “part” means “mass part”. The materials used in the following examples and comparative examples are as follows. The unit of the numerical values in the columns regarding each component and the total in the table is “mass %”.

[0030] The raw materials used in this example are shown below. (Water-based acrylic resin A) Acid value 50 mgKOH / g, Tg = 0 °C, solid content 37.0 mass % (Preparation of emulsion of acrylic resin A) An aqueous solution obtained by dissolving a copolymer composed of acrylic acid, methyl methacrylate, and styrene in aqueous ammonia was used as a polymer emulsifier. Next, in order to form the core part, methyl methacrylate, 2-ethylhexyl acrylate, and diacetone acrylamide were added and emulsion polymerization was carried out by a conventional method. Thereafter, 1 mass % of adipic acid dihydrazide (ADH) was added to the obtained acrylic emulsion solution to prepare an emulsion of water-based acrylic resin A.

[0031] (Emulsion of water-based urethane resin) Tg = -20 °C (Takelac W-6110, manufactured by Mitsui Chemicals, Inc.), solid content 32 mass % (Matting agent) Epistar MS: manufactured by Nippon Shokubai Co., Ltd., average particle diameter 2.0 μm, solid content 100 mass % (Curing agent) Denacol EX-614B: epoxy-based crosslinking agent, manufactured by Nagase ChemteX Corporation, solid content 100 mass % SU-125F: aziridine-based crosslinking agent, manufactured by Meisei Chemical Industry Co., Ltd., solid content 20 mass % (Others) Surfynol 104E: leveling agent, manufactured by Nissin Chemical Industry Co., Ltd., solid content 50 mass % TEGO Foamex 825: defoaming agent, manufactured by EVONIK, solid content 20 mass % Chem Pearl W-401: wax, manufactured by Mitsui Chemicals, Inc., solid content 40 mass % SN thickener 601: Viscosity modifier, manufactured by Sannopco, solid content 40% by mass

[0032] [Table 1]

[0033] [Table 2]

[0034] <Preparation of laminate samples A and B>[ As Experimental Example 1, on one surface side which is the corona-treated surface of an OPP film (manufactured by Toyobo Co., Ltd., P-2161 #25 μm) subjected to corona treatment, the aqueous matte coating agent 1 shown in Table 1 was applied with a proof coater and dried to the dried coating amount shown in Table 2. Subsequently, the varnish 1 shown in Table 1 was applied with a proof coater and dried to the dried coating amount shown in Table 2 to obtain laminate sample A. A laminate exactly the same as this laminate sample A was obtained as laminate sample B in Experimental Example 1. In the same manner as in Experimental Example 1, laminate samples A and B of Experimental Examples 2 to 9 were obtained. In the same manner as in Experimental Example 1 except that the varnish in Experimental Example 1 was not applied, laminate samples A and B without a varnish layer in Comparative Example 1 were obtained.

[0035] <Preparation of laminate sample C>[ On the other surface side which is the corona-treated surface of an OPP film (manufactured by Toyobo Co., Ltd., P-2161 #25 μm) subjected to corona treatment, the other-side varnish shown in Table 1 was applied with a proof coater so that the dried weight became 1.0 g / m 2 and dried to obtain laminate sample C.

[0036] <Adhesion>[ Cellophane tape was attached to the surface of the varnish layer of the printed matter, and the adhesion was evaluated according to the following evaluation criteria based on the degree of peeling when this was rapidly peeled off. (Evaluation criteria)[ 〇: The peeling ratio of the varnish layer is less than 5% in terms of area ratio. △: The peeling ratio of the varnish layer is 5% or more and less than 30% in terms of area ratio. ×: The peeling ratio of the varnish layer is 30% or more in terms of area ratio.

[0037] <Blocking resistance test 1 (To confirm the blocking resistance between the surface where no other layer is formed on the opposite side of the base film (the side without matte processing) and the varnish layer or matte layer) (After winding the long laminate, the blocking resistance between the front and back surfaces of the laminate is assumed and confirmed)> As shown in Fig. 1, the other surface of the base film of laminate sample B was brought into contact with the surface of the varnish layer or matte layer of laminate sample A. For the combined laminate samples A and B, 29.4×10 4 Pa (2 kg / cm 2 ) of load was applied and left at 40°C for 1 day. Then, it was peeled off by hand, and the degree to which the varnish layer or matte layer transferred to the other surface of the base film was visually confirmed to evaluate the blocking resistance. This blocking resistance test 1 confirmed the effect when no other layer was formed on the other surface of the base film. (Evaluation criteria) 〇: No transfer, and no blocking can be confirmed at all. △: Almost no transfer, and partial blocking was confirmed. ×: A lot of transfer occurred, and significant blocking was confirmed.

[0038] <Blocking resistance test 2 (To confirm the blocking resistance between the surface where the other-side varnish layer is formed and the varnish layer or matte layer) (After winding the long laminate, the blocking resistance between the front and back surfaces of the laminate is assumed and confirmed)> As shown in Fig. 1, the layer formed from the other-side varnish agent provided on the other surface side of the base film of laminate sample C was brought into contact with the surface of the varnish layer or matte layer of laminate sample A. For the combined laminate samples A and C, 29.4×10 4 Pa (2 kg / cm 2) was loaded and left at 40 °C for 1 day. Then, it was peeled off by hand, and the degree to which the varnish layer or mat layer and / or the layer formed from the backside varnish agent transferred to the laminate samples A and / C was visually confirmed to evaluate the blocking resistance. This blocking resistance test 2 confirmed the effect when a printing layer (backside varnish layer) was formed on the backside of the base film. (Evaluation criteria) 〇: No transfer, and no blocking can be confirmed at all. △: Almost no transfer, and partial blocking was confirmed. ×: A lot of transfer occurred, and considerable blocking was confirmed.

[0039] <Matte finish> The gloss value of the varnish layer surface of the laminate sample A was measured. The gloss value was measured using a "Variable Angle Glossmeter VG7000" manufactured by Nippon Denshoku Industries Co., Ltd. at an incident angle of 60° (60° angular reflectance). The measurement results were evaluated according to the following criteria. (Evaluation criteria) 〇: The gloss value is 10 or less. △: The gloss value exceeds 10 and is less than 15. ×: The gloss value is 15 or more.

[0040] According to each experimental example which is an example along with the present invention, each layer of the laminate has sufficient adhesiveness and is excellent in blocking resistance and surface matting property. Also, according to Comparative Example 1 where no varnish layer was formed, the results were inferior in adhesiveness and blocking resistance to the printing ink surface. In addition, when the varnish layer was thick as in Comparative Experimental Examples 8 and 9, the results were inferior in surface matting property.

Claims

1. On one side of a base film, a matte layer and a varnish layer containing an aqueous acrylic resin are laminated in this order, wherein the matte layer is a laminate containing one or more selected from an aqueous acrylic resin, an aqueous urethane resin, and an aqueous acrylic urethane resin, and a matting agent.

2. The matting agent is one or more selected from organic particles and inorganic particles, and the laminate according to Claim 1, wherein the average particle diameter thereof is 0.1 μm to 30 μm.

3. The laminate according to Claim 1 or 2, wherein the aqueous acrylic resin contained in the varnish layer has a glass transition temperature of -30°C or higher and 120°C or lower.

4. The laminate according to Claim 1 or 2, having a layer other than the matte layer or the varnish layer on the other side of the base film.

5. The laminate according to Claim 1 or 2, having a printing layer and / or a varnish layer on the other side of the base film.

6. The laminate according to Claim 1 or 2, wherein the aqueous matte coating agent for forming the matte layer and / or the varnish agent for forming the varnish layer contains a crosslinking agent.

7. The laminate according to Claim 6, wherein the crosslinking agent is at least one selected from aziridine-based, epoxy-based, carbodiimide-based, and isocyanate-based.

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