WO2012090767A1

WO2012090767A1 - Curable resin composition for thermoforming films and thermoforming film comprising a laminate of said resin composition

Info

Publication number: WO2012090767A1
Application number: PCT/JP2011/079405
Authority: WO
Inventors: 博志神山
Original assignee: 株式会社カネカ
Priority date: 2010-12-28
Filing date: 2011-12-19
Publication date: 2012-07-05
Also published as: JPWO2012090767A1

Abstract

Disclosed is a thermoforming film with excellent chemical resistance, coatability (pot life), and surface hardness. As an example of chemical resistance, the acrylic resin film is such that even with a sunscreen lotion or hand cream remaining on the acrylic resin film surface, said surface does not roughen even when exposed to high temperatures over a long period of time, and cracks do not form in the film surface when molded into a molded product with a deep drawing shape. Also disclosed is a laminate molded product of said thermoforming film. The curable resin composition of the thermoforming film is characterized by the following: 2-50 mass% of every 100 parts by weight of vinyl monomers having a hydroxyl group are vinyl monomers having a carboxylic acid anhydride group; the resin composition contains (A) a vinyl polymer with a glass transition temperature of 70-140°C and (B) a polyisocyanate compound; and the amount contained of the polyisocyanate compound (B) is an amount that reacts with a solid portion hydroxyl value of 2-80mgKOH/g of the vinyl polymer (A). The disclosed thermoforming resin film is obtained by laminating on one side of a thermoforming film the aforementioned curable resin composition as a 1-20μm thick outermost layer.

Description

Curable resin composition for thermoforming film and thermoforming film in which this resin composition is laminated

The present invention relates to a curable resin composition for a thermoforming film, a thermoforming film formed by coating the composition, and a use thereof.

There are thermoforming methods such as an insert molding method, an in-mold molding method, and a three-dimensional covering molding (TOM molding) as a method for imparting design properties to a molded product at a low cost. In the insert molding method, a film or sheet of polyester resin, polycarbonate resin, acrylic resin or the like that has been decorated by printing or the like is previously formed into a three-dimensional shape by vacuum forming or the like, and an unnecessary film or sheet portion is removed. Then, it is transferred into an injection mold, and a molded product integrated by injection molding of a resin as a base material is obtained. On the other hand, the in-mold molding method is a method in which a film or sheet of polyester resin, polycarbonate resin, acrylic resin or the like that has been decorated for printing or the like is placed in an injection mold, subjected to vacuum molding, and then in the same mold. In this way, an integrated molded product is obtained by injection molding a resin as a base material. TOM molding is a vacuum / pneumatic molding method, and uses a thermoformed film with an adhesive layer on the back side, so that the reverse taper part and the end winding part are coated and formed without any vacuum holes, regardless of the material of the product. is there.

Rubber-containing weight having a specific composition as a molded product using an acrylic resin film having excellent surface hardness and heat resistance (hereinafter referred to as an acrylic resin film molded product) that can be used for insert molding, in-mold molding or TOM molding An acrylic resin film molded article obtained by mixing a coalescence and a thermoplastic polymer having a specific composition at a specific ratio has been proposed (for example, see Patent Documents 1 and 2). Such an acrylic resin film molded product not only imparts decorativeness to the molded product, but also has a function as an alternative material for clear coating.

These acrylic resin film molded articles have excellent characteristics as a skin material for vehicle interiors, but have a problem of low resistance to liquid agents, for example, sunscreen lotions. Alternatively, it has been proposed to laminate a thermoplastic resin using a special monomer (see, for example, Patent Documents 3, 4, 5, and 6). However, in the photocurable resin composition, in order to ensure processability at the time of thermoforming, a new process occurs because curing by light irradiation must be performed after thermoforming, and uniform light irradiation of a three-dimensional molded product There exists such a subject (refer patent document 3). In the thermosetting resin composition, when three-dimensional crosslinking is formed, the thermoplasticity is lost, and there is a problem that the thermosetting resin composition breaks during thermoforming (see Patent Document 4). In addition, when a thermoplastic resin using a special monomer is laminated, there is a problem in chemical resistance in the thin film portion because three-dimensional crosslinking is not formed (see Patent Documents 5 and 6).

JP-A-8-323934 Japanese Patent Laid-Open No. 11-147237 Japanese Patent Laid-Open No. 2005-163003 JP 2008-265062 A JP 2009-196151 A JP 2009-248362 A

The present invention has chemical resistance, for example, a lotion used to prevent sunburn, and the surface of the acrylic resin film does not become rough even if it is exposed to a high temperature for a long time with the hand cream attached, and it is molded into a deep-drawn molded product. It is an object of the present invention to provide a thermoforming film having no surface cracks and having excellent coating workability (pot life) and having a surface hardness, and a laminate molded product thereof. To do.

As a result of intensive studies, the present inventors have found that a curable resin of a vinyl polymer (A) having a hydroxyl group and containing a specific amount of a carboxylic acid anhydride group and a specific ratio of a polyisocyanate compound (B). When the composition is laminated on a film for thermoforming, it is found that a laminated film having excellent chemical resistance, excellent thermoformability, surface hardness and coating workability (pot life) can be formed, and the present invention is completed. It came to. That is, the above object is achieved by the following present invention.
[1] A curable resin composition for a thermoforming film comprising a vinyl polymer (A) having a hydroxyl group and a carboxylic anhydride group and a polyisocyanate compound (B), wherein the vinyl polymer (A ) Contains 2 to 50% by weight of a vinyl monomer having a carboxylic acid anhydride group with respect to 100 parts by weight of the vinyl monomer, and the content of the polyisocyanate compound (B) is the vinyl polymer (A The curable resin composition has a solid content hydroxyl value of 2 to 80 mg KOH / g.
2. The curable resin composition for thermoforming film according to claim 1, wherein the glass transition temperature of the vinyl polymer (A) is 70 to 140 ° C.
“3” A thermoforming resin film having a curable resin composition layer according to “1” or “2” having a thickness of 1 to 20 μm as an outermost layer on one surface of the thermoforming film.
[4] The thermoforming film according to [3], wherein the curable resin layer of the thermoforming film has a pencil hardness (measured based on JIS K5400) of HB or higher.
“5” The film for thermoforming as described in “3” or “4”, wherein the elongation of the thermoformable film having an outermost layer of 15 μm under a tensile condition of 150 ° C. and 500 mm / min is 100% or more.
“6” The thermoforming film according to any one of “3” to “5”, which has a pattern layer on a surface opposite to the curable resin composition layer.
“7” The thermoforming film according to any one of “3” to “6”, wherein the thermoforming film is in-mold molding, insert molding, or TOM molding.
8. The method for producing a thermoforming film according to any one of “3” to “7”, wherein the curable resin layer is formed by a printing method or a coating method.
A laminate obtained by laminating the thermoforming film according to any one of the above “3” to “7” on a base material so that a surface opposite to the curable resin composition layer is in contact therewith.
The thermoforming film according to any one of “3” to “7” is laminated on a substrate by in-mold molding, insert molding or TOM molding so that the surface opposite to the curable resin layer is in contact with the film. A laminated body made of

When the curable resin composition of the present invention is laminated on a thermoforming film, the thermoforming film having excellent chemical resistance, thermoformability, surface hardness, and coating workability (pot life), and laminate molding thereof Goods can be obtained. If the film for thermoforming of the present invention and the laminate molded product thereof are used for an automobile interior member, it can be used for in-mold molding, insert molding or TOM molding with excellent chemical resistance and surface hardness in an existing process.

As the curable resin composition, it is preferable from the viewpoint of chemical resistance and thermoformability to use a thermosetting resin that has a small curing shrinkage and can be uniformly crosslinked. In a non-uniform cured film, the weakest part is attacked by chemicals, and stress is concentrated in the non-uniform part even in thermoforming during heating and breaks. In addition, chemical resistance and thermoformability are in a trade-off relationship. If the curable resin is cured, chemical resistance is improved by increasing the crosslinking density, but thermoplasticity is lost and thermoformability is reduced. For this reason, it is desirable to form a cured film that is cross-linked at a maximum temperature of about 80 ° C. in a car and is thermoplastic at a temperature of about 150 ° C. of the thermoforming temperature. In the present invention, it has been found that the cohesive force due to the carboxylic acid anhydride group expresses such characteristics, and it has a hydroxyl group based on the optimum value of the solid content hydroxyl value related to the amount of carboxylic acid anhydride group and crosslinking. A vinyl polymer (A) having a glass transition temperature of 70 to 140 ° C. and a polyisocyanate compound (B) having 2 to 50% by weight of a monomer having a carboxylic acid anhydride group with respect to 100 parts by weight of the monomer Is a curable resin composition characterized by having a solid content hydroxyl value of 2 to 80 mg KOH / g of the vinyl polymer (A). In addition, coating workability (pot life) was realized.

Examples of the resin containing a carboxylic acid anhydride group and a hydroxyl group include vinyl polymers. In the case of an acrylic resin, the following polymerizable vinyl monomer containing a carboxylic acid anhydride group and a hydroxyl group is used as a base. As mentioned above, it can be obtained by copolymerizing other copolymerizable polymerizable vinyl monomers. These resins may be used alone or in combination of two or more.

The vinyl monomer having a carboxylic anhydride group is not particularly limited as long as it is a monomer having a carboxylic anhydride group and a vinyl group. For example, maleic anhydride, 2-bromomaleic anhydride, Halogenated maleic anhydride such as 2-chloromaleic anhydride, 2,3-dimethylmaleic anhydride; succinic acid having a vinyl group such as 2-allyl succinic anhydride; itaconic anhydride, 1,2,3 , 6-tetrahydrophthalic anhydride, citraconic anhydride, glutaconic anhydride and the like. Among these, maleic anhydride is preferable from the viewpoint of availability and polymerization reactivity.

The monomer having a carboxylic anhydride group is preferably 2 to 50% by weight, more preferably 5 to 40% by weight, still more preferably 10 to 30% by weight based on 100 parts by weight of the vinyl monomer. When the monomer having a carboxylic acid anhydride group of the resin is less than 2% by weight, the resulting cured film has insufficient chemical resistance and thermoformability. When the monomer exceeds 50% by weight, the resin viscosity is low. It becomes large and difficult to handle.

The solid content hydroxyl value is preferably 2 mg KOH / g resin or more, but is not limited to this, and the solid content hydroxyl value involved in crosslinking is important. The upper limit of the solid content hydroxyl value is preferably 190 mgKOH / g resin or less, but is not limited thereto.

Here, the solid content hydroxyl value is a numerical value calculated from the formula shown below.
Solid content hydroxyl value = KOH mg / total amount of resin not containing KOH mg: mol number of hydroxyl group-containing vinyl monomer and / or derivative thereof × 56100 × N (N: hydroxyl group-containing vinyl monomer and / or derivative thereof Number of hydroxyl groups
The hydroxyl value of the resin can also be determined by the measuring method described in JIS K1557-1.

Examples of the polymerizable vinyl monomer containing a hydroxyl group include hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, 1,4-butanediol monomethacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, 1 , 4-butanediol monoacrylate and the like. Further, the alkyl alcohol having 1 to 18 carbon atoms forming the acrylic ester may be any alcohol having a linear, branched or cyclic alkyl group. These may be used alone or in combination of two or more.

Other copolymerizable polymerizable vinyl monomers include, for example, methyl methacrylate, ethyl methacrylate, methacrylic acid-n-propyl, isopropyl methacrylate, methacrylic acid-n-butyl, isobutyl methacrylate, methacrylic acid- t-butyl, pentyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, adamantyl methacrylate, dodecyl methacrylate, isobornyl methacrylate, methyl acrylate, ethyl acrylate, n-propyl acrylate, Isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, pentyl acrylate, hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, acrylic Adamantyl oxalate, dodecyl acrylate, isobornyl acrylate, glycidyl methacrylate, glycidyl acrylate, allyl methacrylate, allyl acrylate, 3,4-epoxycyclohexylmethyl methacrylate, 3,4-epoxycyclohexylmethyl acrylate, phenyl methacrylate, Phenyl acrylate, α-methylstyrene, p-vinyltoluene, methacrylamide, acrylamide, N, N-dimethylmethacrylamide, N, N-dimethylacrylamide, acrylic acid-2,2,6,6-tetramethyl-4- Piperidyl, ethyl vinyl ether, isopropyl vinyl ether, n-propyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, 2-ethylhexyl vinyl ether, cyclohexyl Aliphatic vinyl ether compounds such as vinyl ether, 2,3-dihydrofuran, 3,4-dihydro-2H-pyran, trimethoxysilylpropyl methacrylate, maleic acid esters, fumaric acid esters, styrene, acrylonitrile, methacrylonitrile 2-hydroxyethyl crotonate, 2-hydroxypropyl crotonate, 3-hydroxypropyl crotonate, 3-hydroxybutyl crotonate, 4-hydroxybutyl crotonate, 5-hydroxypentyl crotonate, 6-hydroxyhexyl crotonate, Allyl group-containing compounds such as allyl alcohol and allyl glycidyl ether, alkyl crotonates such as methyl crotonate, ethyl crotonate, and propyl crotonate, vinyl acetate, vinyl propionate, vinyl butyrate , Vinyl pivalate, vinyl caproate, vinyl caprylate, vinyl caprate, vinyl laurate, vinyl stearate, etc., alicyclic carboxylic acid vinyl esters such as cyclohexanecarboxylate vinyl, benzoic acid And aromatic carboxylic acid vinyl esters such as vinyl, vinyl cinnamate, and pt-butyl vinyl benzoate. These may be used alone or in combination of two or more.

Other copolymerizable vinyl monomers are not essential components, and are appropriately selected and used as necessary according to the base material, purpose of use, etc. in designing a cured film.

The method for polymerizing or copolymerizing the polymerizable vinyl monomer or the like is not particularly limited, and a known method such as solution polymerization in an organic solvent can be used. The polymerization method is not particularly limited, and for example, any of radical polymerization, cationic polymerization, and anionic polymerization can be used. Among these, radical polymerization is preferable from an industrial viewpoint. Examples of the polymerization initiator used in radical polymerization include t-butyl hydroperoxide, cumene hydroperoxide, t-butyl peroxyneodecanate, t-butyl peroxypivalate, t-hexyl peroxy-2- Organic peroxides such as ethyl hexanoate and methyl ethyl ketone peroxide, or 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2-methylpropionitrile) (AIBN), Preferred examples include azo initiators such as 2,2′-azobis (2-methylbutyronitrile). Of course, it is not limited to these. These radical polymerization initiators may be used alone or in combination of two or more.

The reaction temperature during radical polymerization is generally preferably 60 to 150 ° C. If this temperature is less than 60 ° C., the radical polymerization initiator is difficult to decompose and the reaction does not proceed easily. If it exceeds 150 ° C., even if the radical polymerization initiator is decomposed by heat to generate radicals, The lifetime is short and the growth reaction is difficult to proceed effectively. The polymerization time depends on the polymerization temperature and other conditions, and cannot be determined in general, but about 2 to 6 hours is generally sufficient.

Examples of the hydroxyl group-containing resin include those modified by addition reaction of a compound capable of addition reaction with a hydroxyl group. Examples of the compound capable of undergoing an addition reaction with a hydroxyl group include lactone compounds and alkylene oxides, with lactone compounds being preferred. Examples of the lactone compound include β-methyl-δ-valerolactone, γ-valerolactone, δ-valerolactone, δ-caprolactone, γ-caprolactone, ε-caprolactone, β-propiolactone, γ-butyrolactone, γ -Nonanoic lactone, δ-dodecanolactone and the like. Examples of the alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, and the like. These compounds capable of undergoing an addition reaction with a hydroxyl group may be used singly or in combination of two or more.

The glass transition temperature of a resin having a hydroxyl group and a specific amount of a carboxylic acid anhydride group is preferably 70 to 140 ° C., more preferably a resin having a glass transition temperature of 80 to 120 ° C. When the glass transition point of the resin is less than 70 ° C., the resulting cured film has insufficient chemical resistance at high temperatures, and when it exceeds 140 ° C., the softening point of the cured film becomes high, and thermoformability. Decreases.

The glass transition temperature is a value described in “Polymer Hand Book (J. Brandrup, Interscience, 1989)” (MMA: 105 ° C., BA: −54 ° C., ST: 100 ° C., HEMA: 55 ° C. , MAA; 130 ° C., BMA; 20 ° C., maleic anhydride; 130 ° C. (using maleic acid value)) was calculated using the Fox formula, but not including the initiator.

The mass average molecular weight is preferably 2000 to 30000, particularly preferably 3000 to 20000. A mass average molecular weight of less than 2000 is not preferable because the entanglement of the resin is small, and a mass average molecular weight of 30000 or more is not preferable because of high viscosity.

(Polyisocyanate compound (B))
The polyisocyanate compound (B) is characterized in that it is contained in such a ratio that it reacts with the solid content hydroxyl value of 2 to 80 mgKOH / g of the vinyl polymer (A). The reaction here means that the hydroxyl group of the resin and the isocyanate group of the polyisocyanate compound (B) are reacted and crosslinked in an equivalent amount. The solid hydroxyl value involved in this crosslinking is preferably 2 to 80 mg KOH / g resin, and more preferably the polyisocyanate compound (B) is blended at a solid content hydroxyl value of 10 to 70 mg KOH / g.

When the content of the polyisocyanate compound (B) is less than the amount that reacts with the solid content hydroxyl value of 2 mgKOH / g, the resulting cured film tends to have insufficient chemical resistance. On the other hand, if the content exceeds the amount that reacts with 80 mgKOH / g, the cross-linking of the cured film becomes too dense and the thermoformability deteriorates.

The amount of isocyanate group contained in the polyisocyanate compound (B) varies depending on the product and cannot be expressed generally in parts by weight. However, the polyisocyanate compound can be expressed in 100 parts by weight of the vinyl polymer (A). (B) is preferably used in an amount of 5 to 60 parts by weight, more preferably 10 to 40 parts by weight.

Examples of polyisocyanate compounds include aliphatic and aromatic compounds. Specific examples of the aliphatic polyfunctional isocyanate include hexamethylene diisocyanate, dicyclohexylmethane 4,4'-isocyanate, 2,2,4-trimethyl-1,6-diisocyanate, and isophorone diisocyanate. Aromatic polyfunctional isocyanates include 2,4-tolylene diisocyanate, 2,6 tolylene diisocyanate, difinylmethane-4,4'-diisocyanate, xylene diisocyanate, polymethylene-polyphenylel-polyisocyanate. Preferred compounds include hexamethylene diisocyanate and xylene diisocyanate.

Structuring includes monomer, burette type, adduct type, and isocyanurate type. Among these, a burette type and an adduct type are preferable.

As the usage-amount of a polyisocyanate compound (B), it is preferable that an isocyanate group is 0.1 equivalent or more and 2 equivalent or less with respect to the hydroxyl group of the said (A) component. If it is less than 0.1 times, the remaining hydroxyl groups are excessive, which is not preferable. If it exceeds 2 times, there is an isocyanate group which remains partially unreacted, which is not preferable.

(catalyst)
A reaction catalyst can be used in the curable resin composition of the present invention.
Examples of the reaction catalyst include a tin compound and a zinc compound. Examples of tin compounds include tin halides such as tin chloride and tin bromide, and organic tin compounds such as dibutyltin diacetate and dibutyltin dilaurate. Examples of zinc compounds include zinc chloride and zinc bromide. Examples include zinc salts of organic acids such as zinc halide, zinc octylate, and zinc laurate. One kind of tin compound or zinc compound as a curing reaction catalyst may be used, or two or more kinds may be used in combination, or may be used in combination with another curing reaction catalyst. The reaction catalyst is preferably used in an amount of 0 to 5 parts by weight based on 100 parts by weight of the vinyl polymer (A).

In addition, a catalyst for ring opening of a carboxylic acid anhydride group can be used, and quasi-crosslinking can be used in which ionic crosslinking or carboxylic acid generation causes crosslinking at about 80 ° C. and crosslinking at about 150 ° C. of the thermoforming temperature. . The amount of the ring-opening catalyst is preferably 0 to 5 parts by weight based on 100 parts by weight of the vinyl polymer (A).

(Curable resin layer)
The curable resin layer is obtained by curing a curable resin.
The thickness of the curable resin layer laminated on one surface of the thermoforming film is preferably 1 to 20 μm. When the thickness of the curable resin layer is 1 μm or more, chemical resistance when a laminated body is obtained can be exhibited. Since the chemical resistance of the part stretched by 200% or more may be required by thermoforming, it is more preferably 3 μm or more. If the thickness of the curable resin layer is 20 μm or less, insert molding or in-mold molding can be performed, and thermoforming into a deep drawing shape is possible, but from the viewpoint of cost, it is more preferably 15 μm or less. The thickness of the curable resin layer was calculated from the difference in thickness with and without coating, and the film thickness was measured according to JIS B 7503.

(Coating film for thermoforming)
In the thermoforming coating film of the present invention, it is preferable that the curable resin layer is formed on the thermoformed film with a thickness of 1 to 20 μm, and the pencil hardness (measured based on JIS K5400) is HB or more. . If the pencil hardness is high, the scratch resistance is improved, so that it can be suitably used for various vehicle members such as a door waist garnish, a front control panel, a power window switch panel, and an airbag cover. It is very useful industrially from the viewpoint of expanding applications.

It is preferable that the curable resin layer on the thermoforming film has a thickness of 15 μm and the elongation under a tensile condition of 150 ° C. and 500 mm / min is 100% or more. If the tensile elongation is 100% or more, deep drawing thermoforming can be performed. As tensile conditions, a 10 × 100 mm sample is visually checked for elongation until cracks occur in the film at a chuck interval of 50 mm, a tensile speed of 500 mm / min, and a tensile constant temperature layer temperature of 150 ° C. The film for thermoforming is preferably 100% or more in elongation until a 10 × 100 mm sample which is the above-mentioned tensile condition is 50 mm between chucks, a pulling speed is 500 mm / min, and a constant temperature isothermal layer temperature is 150 ° C. For example, a thermoplastic resin film of a polymethacrylate resin, a polycarbonate resin, or a polyethylene terephthalate resin can be mentioned, and a methacrylate resin is particularly preferable. The thickness of the thermoforming film is preferably 20 to 300 μm. By setting the thickness of the thermoforming film to 300 μm or less, the film can be wound around a paper tube or the like, and continuous production is facilitated. By making the thickness of the film for thermoforming 20 μm or more, a sense of depth can be more sufficiently imparted to the resulting laminate along with the protective properties of the film. The thickness of the thermoforming film is more preferably 30 μm or more, and particularly preferably 50 μm or more. The upper limit is more preferably 200 μm or less, and particularly preferably 150 μm or less.

The curable resin composition of the present invention may contain an organic solvent, a color pigment, and / or various additives as necessary, for example, an ultraviolet absorber, a light stabilizer, an antioxidant, a surfactant, a leveling agent, A foaming agent, rheology adjusting agents such as polyethylene wax, polyamide wax, and internally crosslinked resin fine particles can be blended.

The organic solvent of the curable resin composition of the present invention is not particularly limited as long as each component can be dissolved, but is preferably selected so that the organic solvent does not remain after baking. . For example, aliphatic hydrocarbons such as n-hexane, n-heptane and n-octane, aromatic hydrocarbons such as benzene, toluene and xylene, halogenated hydrocarbons such as chloroform and carbon tetrachloride, methanol, ethanol Alcohols such as n-propyl alcohol, isopropyl alcohol and n-butyl alcohol, ethers such as dibutyl ether, tetrahydrofuran and 1,4-dioxane, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, ethyl acetate and n acetate And esters such as -propyl and n-butyl acetate. Further, a solvent obtained by adding a soluble amount of water to these organic solvents and mixing them may be used as the solvent. These solvents may be used alone or in combination of two or more. It is desirable to adjust the blending number of the organic solvent to an appropriate coating viscosity. For example, in the case of a gravure coat, the number of blended parts of the solvent that gives a viscosity of 20 to 300 mPa · s and in the case of a die coat is preferably 100 to 3000 mPa · s.

After coating, it is preferable to stand for several hours to several days in an atmosphere of 30 to 80 ° C. in order to make the crosslinking density of the curable resin layer sufficient. Usually, when spray coating is performed on a molded product, a large-scale coating booth is required, and productivity is poor due to poor coating efficiency. On the other hand, the laminate of the present invention is a coating process on a film, so that the coating efficiency is good and the line speed is fast, and in-mold molding, insert molding or TOM molding has the same equipment size as injection molding. Therefore, it is highly industrially useful in terms of productivity and small space.

(Method for forming curable resin layer)
The coating layer is preferably formed by a printing method or a coating method. In this case, the curable resin layer is prepared by dissolving or dispersing the raw material to be the coating layer in a solvent to prepare a paint, applying it to one side of the thermoformed film, and performing heat drying for removing the solvent. Is formed. This method is preferable because the adhesion between the curable resin layer and the thermoformed film is improved.

Examples of printing methods include known printing methods such as gravure printing, screen printing, and offset printing.

Coating methods include flow coating, spray coating, bar coating, gravure coating, gravure reverse coating, kiss reverse coating, micro gravure coating, roll coating, blade coating, rod coating, and roll doctor. Known coating methods such as a coating method, an air knife coating method, a comma roll coating method, a reverse roll coating method, a transfer roll coating method, a kiss roll coating method, a curtain coating method, a die coating method, and a dipping coating method may be mentioned. Particularly preferred is a vacuum die coater. The vacuum die coater can reduce the coating liquid retention and increase the air gap.

(Two-component mixed supply system)
A two-component mixed supply system that mixes immediately before coating is preferable to a system that stores and supplies a coating solution in which two liquids of a main agent and a curing agent are mixed in advance in a tank. By mixing the two liquids immediately before coating, the pot life of the two liquids can be improved, and further, the gel generation in the film coating can be improved by combining with a die coater with less retention.

<Pattern layer>
In the thermoforming film of the present invention, a pattern layer may be formed in order to impart design properties to various substrates. In this case, it is preferable to form the pattern layer on the surface of the thermoforming film opposite to the surface on which the curable resin layer is provided. Moreover, at the time of manufacture of a laminated body, it is preferable from the point of protection of a decorating surface and provision of a high-class feeling to arrange | position a pattern layer to the adhesive surface with a base material. The pattern layer is preferably formed by a printing method or a vapor deposition method.

(Print layer)
The printed layer becomes a pattern or a character on the surface of the laminate obtained by insert molding, in-mold molding, or TOM molding. Examples of the print pattern include a pattern made of wood grain, stone grain, cloth grain, sand grain, geometric pattern, characters, full face, and the like.

As binders for the printing layer, polyvinyl resins such as vinyl chloride / vinyl acetate copolymers, polyamide resins, polyester resins, polyacrylic resins, polyurethane resins, polyvinyl acetal resins, polyester urethane resins, cellulose Examples of the resin include ester resins, alkyd resins, and chlorinated polyolefin resins.

Examples of the method for forming the printing layer include known printing methods such as offset printing, gravure rotary printing, and screen printing; known coating methods such as roll coating and spray coating; and flexographic printing. The thickness of the printing layer may be appropriately determined as necessary, and is usually about 0.5 to 30 μm.

The number of missing prints in the print layer is preferably 10 pieces / m ² or less from the viewpoints of design properties and decorating properties. By the number of missing print ten / m ² or less, the appearance of the laminate using an acrylic resin film for thermoforming becomes better. The number of missing prints in the print layer is more preferably 5 pieces / m ² or less, and particularly preferably 1 piece / m ² or less.

(Deposition layer)
The vapor deposition layer is formed of at least one metal selected from the group consisting of aluminum, nickel, gold, platinum, chromium, iron, copper, indium, tin, silver, titanium, lead, zinc, etc., or an alloy or compound thereof. The Examples of the method for forming the vapor deposition layer include vacuum vapor deposition, sputtering, ion plating, and plating.

<Other layers>
(Adhesive layer)
The acrylic resin film for thermoforming of the present invention may be provided with an adhesive layer as necessary. The adhesive layer is preferably formed on the surface opposite to the surface on which the curable resin layer is provided.

(Thermoplastic resin layer)
The direction in which the thermoforming film is laminated on the thermoplastic resin layer is preferably laminated so that the surface opposite to the surface on which the curable resin layer is provided is in contact with the thermoplastic resin layer. The thermoplastic resin layer is preferably made of a material having compatibility with the base material for the purpose of improving the adhesion with the base material. More preferably, the thermoplastic resin layer is made of the same material as the base material. As the thermoplastic resin layer, a known thermoplastic resin film or sheet can be used. For example, acrylic resin; ABS resin (acrylonitrile-butadiene-styrene copolymer); AS resin (acrylonitrile-styrene copolymer); Vinyl resin; Polyolefin resin such as polyethylene, polypropylene, polybutene, polymethylpentene; Polyolefin copolymer such as ethylene-vinyl acetate copolymer or saponified product thereof, ethylene- (meth) acrylate copolymer; polyethylene Polyester resins such as terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyarylate, polycarbonate; polyamide resins such as 6-nylon, 6,6-nylon, 6,10-nylon, 12-nylon; Resin; Fibrin derivatives such as cellulose acetate and nitrocellulose; Fluororesin such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer; or two selected from these Three or more kinds of copolymers or mixtures, composites, laminates and the like can be mentioned.

If necessary, the thermoplastic resin layer may contain general compounding agents such as stabilizers, antioxidants, lubricants, processing aids, plasticizers, impact agents, foaming agents, fillers, antibacterial agents, and antifungal agents. An agent, a release agent, an antistatic agent, a colorant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a flame retardant, and the like may be blended.

Examples of a method for obtaining a laminated film or sheet include known methods such as thermal lamination, dry lamination, wet lamination, and hot melt lamination. Moreover, the acrylic resin film for thermoforming and the thermoplastic resin layer can be laminated by extrusion lamination.

If necessary, for example, corona treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromate treatment, anchor, primer treatment, etc. on one surface of the thermoforming film, the surface of the thermoplastic resin layer of the laminated film or sheet The surface treatment may be performed. These treatments improve adhesion between the thermoforming film and the curable resin layer or pattern layer, between the thermoplastic resin layer and the pattern layer, between the thermoforming film and the thermoplastic resin layer, etc. Let

<Laminated body>
The laminate of the present invention is obtained by laminating a thermoforming film, the laminated film or a sheet on a substrate. At this time, it is preferable to laminate | stack so that the surface on the opposite side to the surface in which the curable resin layer is provided may contact | connect a base material. Examples of the material of the base material include: resin; wood board such as wood veneer, wood plywood, particle board, medium density fiber board (MDF); water quality board such as wood fiber board; metal such as iron and aluminum.

The resin is not particularly limited. For example, polyolefin resins such as polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, olefin thermoplastic elastomer; polystyrene resin, ABS resin (acrylonitrile-butadiene-styrene) Copolymer), AS resin (acrylonitrile-styrene copolymer), acrylic resin, urethane resin, unsaturated polyester resin, epoxy resin, and other general-purpose thermoplastic or thermosetting resins; polyphenylene oxide / polystyrene resin, polycarbonate General-purpose engineering resins such as resin, polyacetal, polycarbonate-modified polyphenylene ether, polyethylene terephthalate; polysulfone, polyphenylene sulfide, polyphenylene Super engineering resins such as oxides, polyetherimides, polyimides, liquid crystalline polyesters, polyallyl heat-resistant resins, etc .; reinforcing materials such as glass fibers or inorganic fillers (talc, calcium carbonate, silica, mica, etc.), modifiers such as rubber components A composite resin to which is added or various modified resins.

Of these, the material for the base material is preferably a film for thermoforming, a laminated film or a sheet that can be melt bonded. For example, ABS resin, AS resin, polystyrene resin, polycarbonate resin, vinyl chloride resin, acrylic resin, polyester resin, or a resin containing these as main components can be given. In terms of adhesiveness, an ABS resin, an AS resin, a polycarbonate resin, a vinyl chloride resin, or a resin containing these as a main component is preferable, and an ABS resin, a polycarbonate resin, or a resin containing these as a main component is more preferable. Even if it is a resin that is not heat-sealed, such as a polyolefin-based resin, by providing an adhesive layer, it is possible to bond one selected from the group consisting of a film for thermoforming, a laminated film or a sheet thereof and a base material at the time of molding. Is possible.

As the method for producing the laminate of the present invention, a known method such as thermal lamination can be used in the case of a two-dimensional laminate and when the substrate can be thermally fused. For example, for wood substrates such as wood veneer, wood plywood, particle board, medium density fiber board (MDF), water quality boards such as wood fiber board, metals such as iron and aluminum, etc. It is possible to bond them through an adhesive layer.

Further, in the case of a three-dimensional laminate, a known method such as an insert molding method, an in-mold molding method, or a TOM molding can be used.

The in-mold molding method is a method of heating an acrylic resin film for thermoforming, or a laminated film or sheet thereof, and then vacuum-forming in a mold having a vacuuming function, and then a resin to be a base material in the same mold Is a method of obtaining a laminate in which an acrylic resin film for thermoforming, or a laminated film or sheet thereof and a substrate are integrated. The in-mold molding method is preferable from the viewpoints of workability and economy because the film molding and injection molding can be performed in one step.

The heating temperature during in-mold molding is preferably equal to or higher than the temperature at which the acrylic resin film or sheet for thermoforming softens. Specifically, it may be appropriately set depending on the thermal properties of the film or the shape of the laminate, and is usually 70 ° C. or higher. On the other hand, if the temperature is too high, the surface appearance tends to deteriorate or the releasability tends to deteriorate. This may be set as appropriate depending on the thermal properties of the film or the shape of the laminate, and is usually 170 ° C. or lower. Furthermore, from the viewpoint of energy efficiency, it is preferable that the preheating temperature during vacuum forming is low.

When a three-dimensional shape is imparted to the film by vacuum forming, the curable resin composition for a thermoforming film of the present invention and the thermoforming film obtained by laminating this composition are rich in elongation at high temperatures, Very advantageous.

Examples of the laminate obtained by the present invention include automotive parts (for example, parts such as bodies, bumpers, spoilers, mirrors, wheels, interior materials, etc., and various materials), motorcycle parts, road materials. (For example, traffic signs, soundproof walls, etc.), tunnel materials (for example, side walls, etc.), railway vehicles, furniture, musical instruments, home appliances, building materials, containers, office supplies, sports equipment, toys and the like.

Hereinafter, although an example and a comparative example are shown and the present invention is explained still more concretely, these do not limit the present invention at all. In the following description, “part” or “%” represents “part by weight” and “% by weight”, respectively, unless otherwise specified.

Measurement and evaluation in Examples and Comparative Examples were performed using the following conditions and methods.
(1) Polymerization conversion rate The obtained acrylic polymer (D) latex was dried in a hot air dryer at 120 ° C. for 1 hour to determine the amount of solid components, and polymerized by 100 × solid component amount / charged monomer. Conversion (%) was calculated.

(2) Gel content of acrylic polymer The gel content of the acrylic polymer (D) was determined by collecting a predetermined amount of the acrylic resin (D) dry resin powder on a 100-mesh wire net and adding 48 hours to methyl ethyl ketone. After immersing and drying under reduced pressure to remove methyl ethyl ketone, the weight which became constant weight was read and calculated by the following formula (1).
Gel content (%) of acrylic polymer (D)
= (Weight after re-drying / weight of sample collected) × 100 (1)
(3) Glass transition temperature Values described in “Polymer Hand Book (J. Brandrup, Interscience, 1989)” (MMA; 105 ° C., BA; −54 ° C., ST; 100 ° C., maleic anhydride 130 ° C. (using maleic acid value), 2-hydroxyethyl methacrylate: 55 ° C., methacrylic acid; 130 ° C., isobornyl methacrylate; 180 ° C., lauryl methacrylate; −65 ° C.) using the Fox formula However, it was calculated without including the polyfunctional monomer, initiator, and surfactant.

(4) Graft rate 1 g of the dry resin powder of the acrylic polymer (D) is dispersed and dissolved in 50 ml of methyl ethyl ketone (MEK), and the insoluble and soluble components are separated with a centrifuge (30,000 rpm × 2 Hrs). The insoluble matter was sufficiently dried by vacuum drying, and the weight was measured as the rubber / graft content.
Graft rate (%)
= ((Weight of rubber / graft-weight of crosslinked acrylic polymer (D-1)) / weight of crosslinked acrylic polymer (D-1)) × 100
(5) Weight average particle diameter of acrylic polymer (D) Temperature of 23 ° C. ± 2 ° C., humidity obtained by diluting the obtained acrylic polymer (D) latex to a solid content concentration of 0.02% The weight average particle diameter was determined from the light transmittance at a wavelength of 546 nm using a spectrophotometer (manufactured by HITACHI, Spectrophotometer U-2000) at 50% ± 5%.

(6) Reduced Viscosity Methyl ethyl ketone (MEK) soluble content was measured with a 0.3% N, N′-dimethylformamide solution at 30 ° C. The unit is dl / g.

(7) Solid content of resin It was calculated from the following formula from the monomer composition of the hydroxyl value resin.
Solid content hydroxyl value = KOH mg / total amount of resin not containing KOH mg: mol number of hydroxyl group-containing vinyl monomer and / or derivative thereof × 56100 × N (N: hydroxyl group-containing vinyl monomer and / or derivative thereof Number of hydroxyl groups
(8) Mass average molecular weight of resin HLC8220GPC (manufactured by Tosoh Corporation), TPCgel Super H5000, H4000, H3000 (manufactured by Tosoh Corporation) connected as GPC columns, and THF (with stabilizer) as a solvent ) And measured in terms of polystyrene. Other conditions are measurement temperature: INLET OVEN 40 ° C., sample amount: 10 μl, liquid amount: 0.6 ml / min, detector: RI.

(9) Tensile elongation%
Autograph AGS10KNG (manufactured by Shimadzu Corporation), TERMOSTATIC CHAMBER is Model: TCRI-200SP (manufactured by Shimadzu Corporation), sample size is 10 × 100 mm, chuck is 50 mm, pulling speed is 500 mm / min, A tensile test was performed under the condition of a tension thermostatic temperature of 150 ° C., and the elongation until cracks occurred in the film was measured.

(10) Chemical resistance Each of the following chemicals was dropped onto the curable resin layer of each film thickness, and after standing for 1 hour in an 80 ° C. dryer, the chemicals on the surface were wiped off and evaluated.
Evaluation ○: Lifting does not occur, gloss maintenance is maintained x: Lifting occurs, glossless chemicals (i) VW liquid: Octyl Methoxycinnamate / Octocryrene / Homosalate / DEET mixed solvent (ii) Copatone: Copatone SPF50
(Iii) Nibea: Nivea SPF47
(11) Thickness of cured resin layer The thickness of the curable resin layer was calculated from the difference in thickness with and without coating, and the film thickness was measured according to JIS B 7503.

(12) Pencil hardness According to JIS K5400, the pencil hardness of the surface of the curable resin layer was measured.

(13) Vacuum moldability Vacuum molding was performed using a thermoforming film in which a curable resin layer was laminated.
Specifically, vacuum forming was performed with a Y-101 type vacuum forming machine (trade name, manufactured by Sanwa Kogyo Co., Ltd.) having a vacuum drawing function.

The shape of the mold is a switch base mold (MAZDA GENUINE PARTS PANEL S BBM4-68-5L6B02) for the passenger seat, the perspective size is about 100 mm long x 250 mm wide x 15 mm high, and the switch part is about It is 22 mm long x 45 mm wide x 15 mm deep.

Vacuum forming of a thermoforming film laminated with a curable resin layer is performed under the conditions of a heater set temperature of about 340 ° C., a heating time of 9 seconds, a distance between the heater and the film of 10 mm, and a mold temperature of 60 ° C. The vacuum forming was performed in a direction that did not contact the mold.

The state of the side portion of the R portion of the obtained vacuum formed body or the vicinity of the corner of the edge portion was observed and evaluated as follows.
(Evaluation)
○: No cracking ×: Cracking occurred.

(14) Pot life The polymer (A) and the polyisocyanate compound (B) are mixed in the ratio shown in Table 3, and further diluted solvent (C) is added to adjust the viscosity to 100 mPa · s, and the glass bottle is sealed, The viscosity change in a 23 ° C. constant temperature room was measured. The viscosity at each time was measured using a B-type viscometer, and the time when the viscosity exceeded 200 mPa · s was defined as the pot life value.

(Production method of crosslinked acrylic polymer (D): P-1)
200 parts by weight of water and OSA were added in the amounts shown in Table 1 into an 8 liter polymerization vessel equipped with a stirrer, thermometer, nitrogen gas inlet tube, monomer supply tube, and reflux condenser, and the inside of the vessel was sufficiently filled with nitrogen gas. After substituting to make it substantially free of oxygen, the internal temperature was brought to 40 ° C., 5 parts by weight of the mixture (d-1-1) shown in Table 1 was added all at once, and after stirring for 10 minutes, the following substance sodium Formaldehyde sulfoxylate 0.11 part by weight Ferrous sulfate dihydrate 0.004 part by weight Ethylenediaminetetraacetic acid-2-sodium 0.001 part by weight was charged with the mixture (d-1-2) shown in Table 1 After continuously adding and polymerizing at a rate of 10 parts by weight / hour, the polymerization was continued for another 0.5 hours, and the mixture (d-1-3) shown in Table 1 was added at 12.7 parts by weight / hour. Added continuously in proportion and polymerized Further, after continuing the polymerization for 1.0 hour, the polymerization conversion rate is set to 98% or more, the internal temperature is set to 60 ° C., and the mixture (d-2-1) shown in Table 1 is continuously added at a rate of 16.7 parts by weight / hour. Then, the polymerization was further continued for 1.0 hour, and then the polymerization conversion rate was set to 98% or more to terminate the polymerization to obtain an acrylic polymer (D) latex. The obtained latex was salted out with calcium chloride, washed with water and dried to obtain a dry powder (P-1) of acrylic polymerization (D).

Each abbreviation in Table 1 represents the following substance.
OSA; Dioctyl sodium sulfosuccinate BA; Butyl acrylate MMA; Methyl methacrylate ST; Styrene CHP; Cumene hydroperoxide AMA; Allyl methacrylate tDM; Tertiary decyl mercaptan.

(Method for producing thermoplastic film)
After blending the dry powder of P-1 obtained as an acrylic polymer (D) and a methacrylic resin (trade name: Sumipex EX-A manufactured by Sumitomo Chemical Co., Ltd.) at a ratio of 40 parts by weight / 60 parts by weight, , 1 part of UV absorber: TINUVIN234 (manufactured by Ciba Specialty Chemicals Co., Ltd.) and 0.4 part of antioxidant: AO60 (manufactured by ADEKA Co., Ltd.) with respect to 100 parts by weight of the total of P-1 and methacrylic resin. After blending at a blending ratio of parts, extrusion was carried out at a 240 ° C. setting of a vented extruder, pelletizing, and further, a T-die extruder was used to form an extruder at 230 ° C. and a die at 240 ° C. (thickness 125 μm).

(Production method of polymer (A) component: A-1 to A-12)
In a reactor equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen gas introduction pipe and a dropping funnel, the components (a) in Table 2 were charged, and the temperature was raised to 105 ° C. while introducing nitrogen gas. The mixture of components a) was dropped from the dropping funnel at a constant rate over 5 hours. Next, the mixed solution of the component (c) was dropped at a constant rate over 1 hour. Then, after stirring at 105 degreeC for 2 hours continuously, it cooled to 50 degreeC. After cooling, component (D) in Table 2 was added and stirred to synthesize polymer (A). Table 2 shows the solid content concentration of the obtained polymers (A-1 to 15), the number average molecular weight measured by GPC, the glass transition temperature obtained by calculation, and the solid value hydroxyl value obtained by calculation.

(In the table, the amount of components (A) to (D) is by weight)

Takenate D-110N
(Mitsui Chemicals Co., Ltd. polyisocyanate NCO% = 11.5% solids content = 75%, NCO 0.00274 mol / g)
(Examples 1 to 9 and Comparative Examples 1 to 7)
The obtained thermoplastic acrylic film is used as a thermoforming film, and the coating agent having a concentration of 35% is prepared by blending the components (A), (B) and (C) of Table 3 on one side. Coating was performed using a bar coater according to the conditions. No. 8 μm thick with 8 bar coater. No. 16 bar coater, 8 μm thick. The thickness was 15 μm with a 24 bar coater. After coating, after setting at room temperature for 2 minutes, it was dried with an 80 ° C. dryer for 5 minutes and then cured with a 50 ° C. dryer for 7 days. Thereafter, pencil hardness and chemical resistance were evaluated on the curable resin layer side, vacuum moldability was evaluated using the curable resin layer as the outermost surface, and a tensile test was performed by cutting into 10 × 100 mm strips. In the pot life, the components (A) and (B) were mixed at the ratio shown in Table 3, diluted with the component (C) so as to be 100 mPa · s, and the time when the viscosity exceeded 200 mPa · s was measured. The results are shown in Table 3.

A film for thermoforming having a hydroxyl group and a cured resin layer containing a vinyl polymer (A) containing a specific amount of maleic anhydride and a polyisocyanate compound (B) in a specific ratio is vacuum-formable, Excellent pencil hardness, 150 ° C. tensile elongation and coating workability (pot life), and excellent chemical resistance in thin film performance.
In Comparative Example 1, since there was no three-dimensional crosslinking by the polyisocyanate compound (B), the pencil hardness and chemical resistance of the cured resin layer were low.
In Comparative Example 2, since the three-dimensional crosslinking by the polyisocyanate compound (B) became dense, the chemical resistance was excellent, but the vacuum moldability and tensile elongation of the cured resin layer were low.
Comparative Example 3 was an experiment using a polymer (A-11) using methacrylic acid instead of maleic anhydride, and the chemical resistance of the cured resin layer and the pot life of the curable composition were lowered.
Comparative Example 4 was an experiment using a polymer (A-12) containing no maleic anhydride, and the chemical resistance of the curable composition was low.
Comparative Example 5 is an experiment in which a polymer (A-13) containing isobornyl methacrylate having a bulky structure instead of maleic anhydride was used to raise the glass transition temperature of the polymer. Chemical properties are low.
Comparative Example 6 was an experiment using a polymer (A-14) containing lauryl methacrylate instead of maleic anhydride, and the chemical resistance of the curable composition was low.
Comparative Example 7 was an experiment with a blending ratio NCO / OH = 0.33 used for the polymer (A-15) containing no maleic anhydride, and the chemical resistance of the curable composition was low.

As a general method for increasing chemical resistance, there are known methods such as close cross-linking and raising the glass transition temperature of the polymer. In either method, chemical resistance is maintained while maintaining vacuum formability. It was not possible to improve (see Comparative Examples 2 and 5).

Examples of uses of the laminate having a cured resin layer obtained from the curable resin composition of the present invention include automotive parts (for example, parts such as bodies, bumpers, spoilers, mirrors, wheels, interior materials, Various materials), motorcycle parts, road materials (eg traffic signs, noise barriers, etc.), tunnel materials (eg side walls, etc.), railway vehicles, furniture, musical instruments, household appliances, building materials, containers, Office supplies, sports equipment, toys, etc. are listed.

Claims

A curable resin composition for a thermoforming film containing a vinyl polymer (A) having a hydroxyl group and a carboxylic acid anhydride group and a polyisocyanate compound (B), wherein the vinyl polymer (A) is vinyl. The vinyl monomer having a carboxylic acid anhydride group is contained in an amount of 2 to 50% by weight based on 100 parts by weight of the monomer and the content of the polyisocyanate compound (B) is a solid content of the vinyl polymer (A). A curable resin composition having a hydroxyl group value of 2 to 80 mg KOH / g.
The curable resin composition for thermoforming film according to claim 1, wherein the glass transition temperature of the vinyl polymer (A) is 70 to 140 ° C.
3. A thermoforming resin film having the curable resin layer according to claim 1 or 2 having a thickness of 1 to 20 μm on one surface of the thermoforming film.
The thermoforming film according to claim 3, wherein the curable resin layer of the thermoforming film has a pencil hardness (measured based on JIS K5400) of HB or higher.
The film for thermoforming according to claim 3 or 4, wherein an elongation of the thermoformable film having an outermost layer of 15 µm under a tensile condition of 150 ° C and 500 mm / min is 100% or more.
The thermoforming film according to any one of claims 3 to 5, which has a pattern layer on a surface opposite to the curable resin layer.
The thermoforming film according to any one of claims 3 to 6, wherein the thermoforming film is for in-mold molding, insert molding or TOM molding.
The method for producing a thermoforming film according to any one of claims 3 to 7, wherein the thermosetting film is formed by a printing method or a coating method.
A laminate obtained by laminating the thermoforming film according to any one of claims 3 to 7 on a substrate such that a surface opposite to the curable resin layer is in contact therewith.
The thermoforming film according to any one of claims 3 to 7 is laminated on a substrate by an in-mold molding method, an insert molding method or a TOM molding method so that a surface opposite to the curable resin layer is in contact with the film. A laminate composed of