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
  • B32B27/32—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
  • 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
  • C09J11/02—Non-macromolecular additives
  • C09J11/06—Non-macromolecular additives organic
• • 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
  • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
  • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
  • C09J123/04—Homopolymers or copolymers of ethene
• • 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
• • 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
  • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
  • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
• • 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
  • C09J7/35—Heat-activated

Definitions

• the present invention relates to an aqueous dispersion, a laminate, and a method for producing a laminate.
• Examples of materials used for such an adhesive layer include an aqueous dispersion composition containing an ethylene-(meth)acrylic acid copolymer (see, for example, Patent Document 1). Then, the adhesive layer is formed by applying an aqueous dispersion to the base material and drying it.
• the present invention provides an aqueous dispersion with excellent wettability, a laminate comprising an adhesive layer that is a dried product of the aqueous dispersion, and a method for producing a laminate using an adhesive layer that is a dried product of the aqueous dispersion.
• Our goal is to provide the following.
• the present invention [1] includes a resin component, a wetting agent, and water, the resin component includes an ethylene-unsaturated carboxylic acid copolymer, and the wetting agent includes a silicone-based wetting agent and an acetylene-based wetting agent. It is an aqueous dispersion containing an agent.
• the present invention provides the above-mentioned [1], wherein the ethylene-unsaturated carboxylic acid copolymer is a polymer of monomer components containing ethylene and an unsaturated carboxylic acid, and the unsaturated carboxylic acid is acrylic acid. contains the aqueous dispersion described in ].
• the blending ratio of the silicone-based wetting agent is 0.01 part by mass or more with respect to 100 parts by mass of the total amount of the resin component and the water
• the blending ratio of the acetylene-based wetting agent is , the water dispersion according to [1] or [2] above is contained in an amount of 0.1 part by mass or more based on 100 parts by mass of the resin component and the water in total.
• the present invention [4] includes the aqueous dispersion according to any one of [1] to [3] above, wherein the acetylene wetting agent has an HLB value of 15 or less.
• the present invention [5] is provided with a first base material, an adhesive layer, and a second base material in order toward one side in the thickness direction, and the adhesive layer includes any one of the above [1] to [4].
• a laminate which is a dried product of the aqueous dispersion according to item 1, wherein the first base material and the second base material are at least one selected from the group consisting of a resin film, a metal film, and paper. Contains.
• the present invention [6] includes a first step of preparing a first base material, a second step of arranging an adhesive layer on one side in the thickness direction of the first base material, and a second step of disposing an adhesive layer on one side in the thickness direction of the first base material. a third step of arranging a second base material on the surface and bonding the first base material and the second base material by thermocompression bonding; A dried product of the aqueous dispersion according to any one of , wherein the first base material and the second base material are at least one selected from the group consisting of a resin film, a metal film, and paper. It includes a method for manufacturing a laminate.
• the aqueous dispersion of the present invention contains a silicone wetting agent and an acetylene wetting agent as wetting agents. Therefore, it has excellent wettability.
• the laminate of the present invention includes an adhesive layer that is a dried product of the aqueous dispersion of the present invention. Therefore, it has excellent adhesive properties.
• the method for manufacturing a laminate of the present invention includes a second step of arranging an adhesive layer, which is a dried product of an aqueous dispersion, on one side in the thickness direction of the first base material. Therefore, a laminate with excellent adhesiveness can be manufactured.
• FIG. 1A to 1C are schematic diagrams showing one embodiment of a method for manufacturing a laminate.
• FIG. 1 shows a first step of preparing a first base material.
• FIG. 1B shows a second step of arranging an adhesive layer on one side in the thickness direction of the first base material.
• FIG. 1C shows a third step of arranging the second base material on one side in the thickness direction of the adhesive layer and bonding the first base material and the second base material by thermocompression bonding.
• the water dispersion contains a resin component, a wetting agent, and water.
• the resin component includes an ethylene-unsaturated carboxylic acid copolymer.
• the ethylene-unsaturated carboxylic acid copolymer is obtained by polymerizing monomer components containing ethylene and an unsaturated carboxylic acid.
• An unsaturated carboxylic acid is a monomer having at least one ethylenically unsaturated bond and a carboxy group.
• unsaturated carboxylic acids include monobasic acids and dibasic acids.
• monobasic acids include acrylic acid, methacrylic acid, and crotonic acid.
• dibasic acids include maleic acid, fumaric acid, and itaconic acid.
• the unsaturated carboxylic acid is a monobasic acid. More preferred unsaturated carboxylic acids include acrylic acid and methacrylic acid. That is, more preferably, the ethylene-unsaturated carboxylic acid copolymer is an ethylene-acrylic acid copolymer and an ethylene-methacrylic acid copolymer. Further, as the unsaturated carboxylic acid, from the viewpoint of improving wettability, acrylic acid is more preferably used.
• the unsaturated carboxylic acids can be used alone or in combination of two or more.
• the content of ethylene is, for example, 75% by mass or more, preferably 78% by mass or more, and, for example, 92% by mass or less, preferably, based on the total amount of ethylene and unsaturated carboxylic acid. is 88% by mass or less.
• the content of the unsaturated carboxylic acid is, for example, 8% by mass or more, preferably 12% by mass or more, and, for example, 25% by mass or less, preferably, with respect to the total amount of ethylene and unsaturated carboxylic acid. It is 22% by mass or less.
• Polymerization of the monomer components is not particularly limited, and known polymerization methods can be employed.
• Known polymerization methods include, for example, a method in which a monomer component and a polymerization initiator (peroxide) are brought into contact at high temperature and high pressure conditions.
• the ethylene-unsaturated carboxylic acid copolymer is preferably obtained as a dispersion in which particles of the ethylene-unsaturated carboxylic acid copolymer are dispersed in water.
• additives may be added to the dispersion of the ethylene-unsaturated carboxylic acid copolymer from the viewpoint of improving manufacturing stability.
• additives include pH adjusters, metal ion sealants (e.g., ethylenediaminetetraacetic acid and its salts), molecular weight regulators (chain transfer agents, e.g., mercaptans and low-molecular-weight halogen compounds), and lubricants ( For example, N-oleyl palmitamide) can be mentioned.
• the blending ratio of additives is appropriately set depending on the purpose and use.
• the ethylene-unsaturated carboxylic acid copolymer (specifically, the carboxy group of the ethylene-unsaturated carboxylic acid copolymer) is preferably neutralized from the viewpoint of dispersion stability.
• a neutralizing agent is added to the dispersion of the ethylene-unsaturated carboxylic acid copolymer.
• Examples of the neutralizing agent include basic compounds.
• Examples of the basic compound include inorganic basic compounds and organic basic compounds.
• Examples of the inorganic basic compound include sodium hydroxide, potassium hydroxide, lithium hydroxide, rubidium hydroxide, and cesium hydroxide.
• Examples of the organic basic compound include ammonia, triethylamine, triethanolamine, diethylamine, and dimethylethanolamine.
• Preferable examples of the neutralizing agent include inorganic basic compounds. More preferred neutralizing agents include potassium hydroxide.
• the amount of the neutralizing agent added is, for example, 5 mol or more, preferably 20 mol or more, and, for example, 200 mol or less, preferably, with respect to 100 mol of carboxy groups in the ethylene-unsaturated carboxylic acid copolymer. It is 150 moles or less.
• the neutralizing agents can be used alone or in combination of two or more.
• the dispersion of the ethylene-unsaturated carboxylic acid copolymer is preferably maintained at a predetermined temperature for a predetermined time.
• the holding temperature is, for example, 40°C or higher, preferably 50°C or higher, more preferably 100°C or higher, and, for example, 190°C or lower, preferably 180°C or lower.
• the holding time is, for example, 30 minutes or more, preferably 1 hour or more, more preferably 2 hours or more, and, for example, 12 hours or less, preferably 10 hours or less, more preferably 6 hours or less. be.
• the degree of neutralization is, for example, 10% or more, preferably 15% or more, and, for example, 60% or less, preferably 50% or less.
• the weight average molecular weight of the ethylene-unsaturated carboxylic acid copolymer is, for example, 5,000 or more, preferably 10,000 or more, and preferably 1,000,000 or less, as measured by gel permeation chromatography (GPC) in terms of standard polystyrene. is less than or equal to 100,000.
• the weight average particle diameter (measurement method: light scattering measurement) of the particles of the ethylene-unsaturated carboxylic acid copolymer is, for example, 0.01 ⁇ m or more, preferably 0.02 ⁇ m or more, for example, 10 ⁇ m or less, preferably , 3 ⁇ m or less.
• the solid content concentration of the ethylene-unsaturated carboxylic acid copolymer is, for example, 10% by mass or more, preferably 20% by mass or more, more preferably, The content is 30% by mass or more, for example, 60% by mass or less, preferably 50% by mass or less.
• the ethylene-unsaturated carboxylic acid copolymer can be used alone or in combination of two or more. When two or more types of ethylene-unsaturated carboxylic acid copolymers are used in combination, ethylene-acrylic acid copolymers and ethylene-methacrylic acid copolymers are preferably used in combination.
• the content ratio of ethylene-acrylic acid copolymer should be the same as that of ethylene-acrylic acid copolymer and ethylene-methacrylic acid copolymer. Based on the total amount, it is, for example, 20% by mass or more, preferably 30% by mass or more, more preferably 40% by mass or more, and, for example, 80% by mass or less, preferably 70% or less.
• the content of the ethylene-methacrylic acid copolymer is, for example, 20% by mass or more, preferably 30% by mass or more, based on the total amount of the ethylene-acrylic acid copolymer and the ethylene-methacrylic acid copolymer. Further, for example, it is 80% by mass or less, preferably 70% by mass or less, and more preferably 45% by mass or less.
• the resin component contains other resins as necessary.
• Examples of other resins include polyolefin resins.
• Examples of the polyolefin resin include polyethylene (eg, linear low density polyethylene, high density polyethylene), polypropylene, propylene-ethylene copolymer, and ethylene-butene copolymer.
• Other resins preferably include polyethylene and ethylene-butene copolymers.
• the content of the ethylene-unsaturated carboxylic acid copolymer is, for example, based on 100 parts by mass of the ethylene-unsaturated carboxylic acid copolymer and the other resin. , 30 parts by mass or more, preferably 40 parts by mass or more, and, for example, 85 parts by mass or less, preferably 75 parts by mass or less.
• the content ratio of the other resin is, for example, 15 parts by mass or more, preferably 25 parts by mass or more, based on 100 parts by mass of the ethylene-unsaturated carboxylic acid copolymer and other resins, and, for example, , 70 parts by mass or less, preferably 60 parts by mass or less.
• the resin component contains other resins
• the ethylene-unsaturated carboxylic acid copolymer and the other resins may be mixed and kneaded using a known kneading device (for example, the method described in JP-A-63-46273).
• a resin component is prepared by melt-kneading using a kneading device).
• the blending ratio of the resin component is, for example, 25% by mass or more, preferably 35% by mass or more, and, for example, 65% by mass or less, preferably 55% by mass or less, based on the water dispersion.
• Wetting agents include silicone wetting agents and acetylene wetting agents.
• a silicone wetting agent is a surfactant that is relatively hydrophilic compared to an acetylene wetting agent.
• silicone wetting agents include organopolysiloxane.
• organopolysiloxane examples include dimethylpolysiloxane, methylphenylpolysiloxane, and fluoropolysiloxane.
• silicone wetting agents include modified organopolysiloxanes (modified organopolysiloxanes).
• modified organopolysiloxane include epoxy-modified organopolysiloxane, amino-modified organopolysiloxane, carboxyl-modified organopolysiloxane, polyester-modified organopolysiloxane, and polyether-modified organopolysiloxane.
• silicone wetting agent examples include modified organopolysiloxane.
• polyether-modified organopolysiloxane is more preferably used as the silicone wetting agent.
• polyether-modified dimethylpolysiloxane is more preferably used as the silicone wetting agent.
• the silicone wetting agents can be used alone or in combination of two or more types.
• the blending ratio of the silicone wetting agent is, for example, 0.01 parts by mass or more, preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass, based on 100 parts by mass of the total amount of the resin component and water.
• the amount is, for example, 1.0 parts by mass or less, preferably 0.8 parts by mass or less.
• the blending ratio of the silicone wetting agent is, for example, 1 part by mass or more, preferably 4 parts by mass or more, more preferably 8 parts by mass with respect to 100 parts by mass of the total amount of the silicone wetting agent and the acetylene wetting agent. parts or more, more preferably 15 parts by mass or more, and, for example, 45 parts by mass or less, preferably 40 parts by mass or less, more preferably 30 parts by mass or less, still more preferably 20 parts by mass or less.
• the blending ratio of the silicone wetting agent is at least the above lower limit, wettability can be improved.
• the adhesive strength will be excellent.
• the acetylene wetting agent is a surfactant that is relatively hydrophobic compared to the silicone wetting agent.
• the acetylene wetting agent is a glycol having an acetylene group.
• the acetylene wetting agent is preferably a glycol having a bilaterally symmetrical structure with an acetylene group located in the center. It can also have a structure in which ethylene oxide is added to acetylene glycol.
• such acetylene wetting agents include 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 2,4,7,9-tetramethyl-5-decyne- a mixture with 4,7-diol-di(polyoxyethylene) ether, 2,4,7,9-tetramethyl-5-decyne-4,7-diol-di(polyoxyethylene) ether, and 2, A mixture of 4,7,9-tetramethyl-5-decyne-4,7-diol and isopropanol may be mentioned.
• acetylene wetting agent Commercially available products can also be used as the acetylene wetting agent. Examples of such commercially available products include the Surfynol series (manufactured by Nissin Chemical Industry Co., Ltd.).
• Acetylene wetting agents can be used alone or in combination of two or more types.
• the HLB value of the acetylene wetting agent is, for example, 15 or less, preferably 10 or less, more preferably 5 or less, and also, for example, 1 or more, preferably 2 or more.
• the HLB value of an acetylene wetting agent can be calculated using Griffin's formula.
• the surface tension of the acetylene wetting agent at 23° C. is, for example, 20 mN/m or more, preferably 30 mN/m or more, and, for example, 50 mN/m or less.
• the blending ratio of the acetylene wetting agent is, for example, 0.1 parts by mass or more, preferably 0.3 parts by mass or more, more preferably 0.5 parts by mass, based on 100 parts by mass of the total amount of the resin component and water.
• the amount is, for example, 2.0 parts by mass or less, preferably 1.5 parts by mass or less.
• the blending ratio of the acetylene wetting agent is preferably higher than the blending ratio of the silicone wetting agent.
• the blending ratio of the acetylene wetting agent is, for example, 55 parts by mass or more, preferably 60 parts by mass or more, more preferably , 70 parts by mass or more, more preferably 80 parts by mass or more, and, for example, 99 parts by mass or less, preferably 96 parts by mass or less, more preferably 92 parts by mass or less, still more preferably 85 parts by mass or less. be.
• the mass ratio of the acetylene wetting agent to the silicone wetting agent is, for example, 1.2 or more, preferably 1.5 or more, more preferably 2.3 or more, and even more preferably, 4.0 or more, and for example, 99 or less, preferably 24 or less, more preferably 11.5 or less, still more preferably 5.6 or less.
• the blending ratio of the acetylene wetting agent is at least the above lower limit, wettability can be improved.
• the adhesive strength will be excellent.
• wetting agent can also contain other wetting agents other than the silicone-based wetting agent and the acetylene-based wetting agent.
• wetting agents include polyoxyethylene alkyl ether wetting agents, fluorine wetting agents, and alkylsulfosuccinic acid wetting agents.
• wetting agents can be used alone or in combination of two or more.
• the wetting agent preferably does not contain any other wetting agent and consists only of a silicone wetting agent and an acetylene wetting agent.
• the aqueous dispersion is produced by blending a resin component and a wetting agent. Specifically, an aqueous dispersion is produced by blending a dispersion of an ethylene-unsaturated carboxylic acid copolymer (ethylene-unsaturated carboxylic acid copolymer and water) and a wetting agent.
• additives can be added to the aqueous dispersion in appropriate proportions.
• additives include curing agents, crosslinking agents, film forming aids, antifoaming agents, tackifiers, hardening agents, preservatives, thickeners, antifreeze agents, dispersants, inorganic pigments, and organic pigments. Can be mentioned.
• the additives can be used alone or in combination of two or more.
• the above water dispersion can be suitably used as an adhesive layer for bonding base materials (for example, a first base material and a second base material described below) to each other.
• base materials for example, a first base material and a second base material described below
• a method for bonding base materials to each other and manufacturing a laminate using the above water dispersion will be described in detail.
• the vertical direction of the paper surface is the vertical direction (thickness direction), and the upper side of the paper surface is the upper side (one side in the thickness direction), and the lower side of the paper surface is the lower side (the other side in the thickness direction).
• the left-right direction and the depth direction of the paper surface are plane directions perpendicular to the up-down direction. Specifically, it conforms to the direction arrows in each figure.
• the method for manufacturing the laminate 10 includes a first step of preparing the first base material 1, a second step of disposing the adhesive layer 2 on one side in the thickness direction of the first base material 1, and a second step of disposing the adhesive layer 2 on one side of the first base material 1 in the thickness direction.
• a third step of arranging the second base material 3 on one surface in the thickness direction and bonding the first base material 1 and the second base material 3 by thermocompression bonding is provided.
• a first base material 1 is prepared.
• the first base material 1 is not particularly limited.
• the first base material 1 at least one selected from the group consisting of a resin film, a metal film, and paper is preferably selected.
• materials for the resin film include polymer materials.
• polymeric materials include olefin resins (e.g., polyethylene, polypropylene), acrylic resins, polyester resins, polycarbonate resins, acrylonitrile-styrene-butadiene copolymer resins (ABS resins), polyamide resins (e.g., nylon), and Examples include polyphenylene sulfide resin.
• the material for the metal film include aluminum, gold, silver, copper, nickel, zinc, titanium, cobalt, indium, and chromium.
• paper materials include cellulose.
• the first base material 1 may be surface-treated if necessary.
• the surface treatment include ink (solvent-based or water-based) coating treatment, plating treatment, coupling treatment, and vacuum plasma treatment.
• the thickness of the first base material 1 is not particularly limited.
• the thickness of the first base material 1 is, for example, 10 ⁇ m or more and, for example, 100 ⁇ m or less.
• the water dispersion described above is applied to one side of the first base material 1 in the thickness direction.
• one surface of the first base material 1 in the thickness direction is subjected to a surface treatment.
• Examples of surface treatments include corona treatment, plasma treatment, flame treatment, ozone treatment, primer treatment, glow treatment, and saponification treatment.
• the above water dispersion is applied to one side of the first base material 1 in the thickness direction, and then dried.
• coating methods include known coating methods such as barcoder method, curtain coating method, roll coating method, and blade coating method.
• the drying temperature is, for example, 50°C or higher, preferably 80°C or higher, and, for example, 120°C or lower. Further, the drying time is, for example, 10 seconds or more and, for example, 120 seconds or less.
• the adhesive layer 2 which is a dried product of the water dispersion, is placed on one side of the first base material 1 in the thickness direction.
• the mass per unit area of the adhesive layer 2 is, for example, 0.1 g/m 2 or more, preferably 0.5 g/m 2 or more, and, for example, 10 g/m 2 or less, preferably 6 g/m 2 It is as follows.
• the thickness of the adhesive layer 2 is, for example, 0.1 ⁇ m or more and, for example, 10 ⁇ m or less.
• the second base material 3 is placed on one side in the thickness direction of the adhesive layer 2, and the first base material 1 and the second base material 3 are bonded together by thermocompression bonding. .
• the second base material 3 is not particularly limited. As the second base material 3, a base material similar to the above-described first base material 1 is selected.
• the first base material 1 and the second base material 3 are the same or different from each other.
• the first base material 1 and the second base material 3 are the same, and more preferably, both are metal films (for example, aluminum films).
• thermocompression bonding As conditions for thermocompression bonding, the temperature of thermocompression bonding is, for example, 80°C or higher, preferably 100°C or higher, and, for example, 190°C or lower, preferably 170°C or lower. Further, the pressure of thermocompression bonding is 1.5 kg/cm 3 or more and 3.5 kg/cm 3 or less.
• a laminate 10 is manufactured, which includes the first base material 1, the adhesive layer 2, and the second base material 3 in this order toward one side in the thickness direction.
• the laminate 10 includes the first base material 1, the adhesive layer 2, and the second base material 3 in this order toward one side in the thickness direction, but it also includes a known adhesive.
• An adhesive layer (not shown) may also be interposed.
• another adhesive layer may be interposed between the first base material 1 and the adhesive layer 2 and/or between the adhesive layer 2 and the second base material 3.
• the water dispersion contains a silicone wetting agent and an acetylene wetting agent as wetting agents. Therefore, it has excellent wettability.
• the ethylene-unsaturated carboxylic acid copolymer is preferably an ethylene-acrylic acid copolymer or an ethylene-methacrylic acid copolymer. Further, the ethylene-unsaturated carboxylic acid copolymer is more preferably an ethylene-acrylic acid copolymer from the viewpoint of improving wettability.
• the laminate 10 also includes an adhesive layer 2 that is a dried product of the water dispersion. That is, the laminate 10 includes the adhesive layer 2 which is a dried product of an aqueous dispersion having excellent wetting properties. Therefore, it has excellent adhesive properties.
• Such a laminate 10 can be suitably used, for example, as a packaging material for industrial products (for example, confectionery, foods, daily necessities, medicines, and papers).
• industrial products for example, confectionery, foods, daily necessities, medicines, and papers.
• the method for manufacturing the laminate 10 also includes a second step of arranging an adhesive layer 2, which is a dried product of an aqueous dispersion, on one side of the first base material 1 in the thickness direction.
• the method for manufacturing the laminate 10 includes a second step of disposing an adhesive layer 2, which is a dried product of an aqueous dispersion having excellent wetting properties, on one surface of the first base material 1 in the thickness direction. Therefore, a laminate 10 with excellent adhesiveness can be manufactured.
• BYK-331 Polyether modified polydimethylsiloxane, silicone wetting agent
• BYK BYK-333 Polyether modified polydimethylsiloxane, silicone wetting agent
• BYK BYK-307 Polyether modified polydimethylsiloxane, silicone Wetting agent
• BYK, BYK-302 polyether modified polydimethylsiloxane, silicone wetting agent
• Surfynol 420 manufactured by BYK: acetylene wetting agent, 2,4,7,9-tetramethyl-5-decyne- Mixture of 4,7-diol and 2,4,7,9-tetramethyl-5-decyne-4,7-diol-di(polyoxyethylene) ether (ratio 3/7), surface tension (23°C) : 31 mN/m, HLB value 4, Nissin Chemical Industry Co., Ltd.
• Surfynol 440 Acetylene wetting agent, 2,4,7,9-tetramethyl-5-decyne-4,7-diol-di(polyoxy ethylene) ether, surface tension (23°C): 32 mN/m, HLB value 8, Nissin Chemical Industry Co., Ltd.
• Surfynol 104PA acetylene wetting agent, 2,4,7,9-tetramethyl-5-decyne- Mixture of 4,7-diol and isopropanol (ratio 1:1), surface tension (23°C): 33 mN/m, HLB value 4, Nissin Chemical Industry Co., Ltd.
• Surfynol 465 acetylene wetting agent, 2, 4,7,9-tetramethyl-5-decyne-4,7-diol-di(polyoxyethylene) ether, surface tension (23°C): 42 mN/m, HLB value 13, Nissin Chemical Industry Co., Ltd.
• Surfi Nol 485 Acetylene wetting agent, 2,4,7,9-tetramethyl-5-decyne-4,7-diol-di(polyoxyethylene) ether, surface tension (23°C): 51 mN/m, HLB value 17.
• Manufacturing example 2 100 parts by mass of ethylene-methacrylic acid copolymer (methacrylic acid content: 15% by mass) and 3 parts by mass of potassium hydroxide (30% neutralization degree of ethylene-methacrylic acid copolymer with respect to methacrylic acid) , 1 part by mass of N-oleyl palmitamide, and 140 parts by mass of deionized water were placed in a reaction vessel and stirred, and the temperature was raised to 150° C. and maintained for 4 hours. Thereafter, it was cooled to room temperature to obtain a dispersion of ethylene-methacrylic acid copolymer. The resulting dispersion of ethylene-acrylic acid copolymer was used as a resin component. Furthermore, the particle size of the ethylene-methacrylic acid copolymer in the dispersion was 2.0 ⁇ m. Moreover, the viscosity was 200 mPa ⁇ s. Moreover, the solid content concentration was 42% by mass.
• an aqueous potassium hydroxide solution was added so that the degree of neutralization of the methacrylic acid units in the ethylene-methacrylic acid copolymer and the methacrylic acid units in the ethylene-acrylic acid copolymer was 50%. It was neutralized. Thereafter, N-oleyl palmitamide and deionized water were added to the resin (linear low density polyethylene, ethylene-butene copolymer, ethylene-methacrylic acid copolymer, and ethylene-acrylic acid copolymer) in a kneader. ) was supplied in an amount of 2 parts by mass to 100 parts by mass.
• a resin component (a dispersion of the above resin). Further, the particle size of the ethylene-methacrylic acid copolymer and the particle size of the ethylene-acrylic acid copolymer in the dispersion were 1.0 ⁇ m. Moreover, the viscosity was 300 mPa ⁇ s. Further, the solid content concentration was 40% by mass.
• the wettability to PP and the wettability to AL were scored based on the following criteria. The results are shown in Tables 1 to 5. (standard) 5 There was no hydrangea. 4 One repellent was observed. 3 Two or more and three or less repellents were observed. 2 4 or more and 5 or less repellents were observed. 1 More than 6 repellents were observed.
• wettability was evaluated based on the following criteria. The results are shown in Tables 1 to 5. (standard) ⁇ : The total wettability score was 5 or more. ⁇ : The total wettability score was 4 or less.
• Examples 1 to 27 that contain a silicone wetting agent and an acetylene wetting agent as wetting agents have higher wetting properties than Comparative Examples 1 to 13 that do not contain at least one of a silicone wetting agent and an acetylene wetting agent. Excellent in sex. From this, it can be seen that it is better to include a silicone-based wetting agent and an acetylene-based wetting agent as the wetting agent.
• Example 1 and Example 2 which have the same formulation other than the resin component
• Example 1 and Example 26 which have the same formulation other than the resin component
• Example 1 and Example 26 containing ethylene-methacrylic acid copolymer have better wettability than Example 24 containing ethylene-methacrylic acid copolymer (Production Example 2).
• This shows that the resin component containing an ethylene-acrylic acid copolymer has better wettability than the resin component containing an ethylene-methacrylic acid copolymer.
• aqueous dispersion, laminate, and method for producing a laminate of the present invention can be suitably used, for example, in packaging materials for industrial products (for example, confectionery, foods, daily necessities, pharmaceuticals, and papers).

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