Adhesive interlining and application method thereof

Abstract

To provide an adhesive interlining without a base fabric which has adhesion suitability that can give temporary bonding by being pressure-sensitively stuck to a cloth of clothing as a fabric product.SOLUTION: There is provided an adhesive interlining (10) used for preventing the shape collapse of a fabric product and enhancing the shape retention. The adhesive interlining (10) contains an acrylic polymer (a) having an epoxy group and a heat curing agent (b), thereby having a heat curing property. An application method of the adhesive interlining comprises a step of pressure-sensitively stacking the adhesive interlining (10) to a cloth for clothing and a step of heating to thermally cure the pressure-sensitively stuck adhesive interlining (10).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an adhesive interlining and a method for using the adhesive interlining. [Background technology]

[0002] Adhesive interlinings are used in woven products such as jackets, blazers, slacks, skirts, etc. to prevent them from losing their shape and to improve their shape retention. Adhesive interlinings usually have a heat-melting resin part called hot melt fixed to the surface of the base fabric, and are configured so that they can be easily attached to clothing fabrics using a hot press or the like.

[0003] Patent Document 1 discloses an adhesive interlining including a support layer and a covering layer coated with an adhesive.

[0004] Patent Document 2 discloses an adhesive interlining comprising a base fabric, a first resin part that is solid and heat-fusible at room temperature on one main surface of the base fabric, and a second resin part that is adhesive at room temperature on one main surface of the base fabric, the second resin part covering the base fabric and the first resin part so that at least a portion of the first resin part is exposed on the one main surface of the base fabric. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2013-543544 [Patent Document 2] Patent Publication No. 2021-042515 Summary of the Invention [Problem to be solved by the invention]

[0006] In the adhesive interlinings listed above, at least one main surface of a base fabric (support layer in Patent Document 1, base fabric in Patent Document 2) that has the necessary strength as an interlining is provided with a temporary fixing layer (coating layer coated with adhesive in Patent Document 1, second resin part in Patent Document 2) that can temporarily fix the adhesive interlining to the clothing fabric of a woven fabric product by pressure-sensitive adhesion.

[0007] An object of the present invention is to provide an adhesive interlining that is free from a base fabric and has a suitable attachment property that allows it to be temporarily attached by pressure-sensitive adhesion to the clothing fabric of a woven fabric product. [Means for solving the problem]

[0008] Conventionally, in order to temporarily attach an adhesive interlining to a rough surface such as a clothing fabric of a woven fabric product, the adhesive interlining is generally provided with a temporary attachment layer on a base fabric having the necessary strength as an interlining. However, the inventors have unexpectedly found through their research that by using an acrylic adhesive that is heat-cured after heat-compression bonding, it is possible to improve the stiffness of the fabric that has pressure-sensitive adhesive properties before heat-compression bonding, and thus to use it for an adhesive interlining, leading to the completion of the present invention. That is, the present invention has the following aspects.

[0009] [1] An adhesive interlining used to prevent a fabric product from losing its shape and to improve its shape retention, An adhesive interlining containing an acrylic polymer (a) having an epoxy group and a heat curing agent (b) and having thermosetting properties. [2] The adhesive interlining according to [1], further comprising an epoxy resin (d). [3] The adhesive interlining according to [1] or [2], wherein the content of structural units derived from monomers having an epoxy group in the acrylic polymer (a) is 1 to 35 mass % based on the total amount of structural units. [4] The adhesive interlining according to any one of [1] to [3], wherein the content of structural units derived from 2-ethylhexyl acrylate in the acrylic polymer (a) is 30 mass% or more based on the total amount of structural units. [5] A method for using an adhesive interlining, comprising the steps of: pressure-sensitively adhering the adhesive interlining described in any one of [1] to [4] to a clothing fabric; and heating the pressure-sensitively adhered adhesive interlining to thermally cure it. Effect of the Invention

[0010] According to the present invention, it is possible to provide an adhesive interlining that is free from a base fabric and has the attachment suitability to enable temporary attachment by pressure-sensitive adhesion to the clothing fabric of a woven fabric product. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a cross-sectional view of an adhesive interlining according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] <Adhesive interlining> The adhesive interlining according to the embodiment is an adhesive interlining used to prevent a fabric product from losing its shape and to improve its shape retention, and contains an acrylic polymer (a) having an epoxy group and a thermosetting agent (b), and has thermosetting properties. FIG. 1 is a cross-sectional view that illustrates an example of an adhesive interlining 10 according to an embodiment. The adhesive interlining 10 shown in FIG. 1 has a first release liner 201 on one side 10a (sometimes referred to as the "first side" in this specification) and a second release liner 202 on the other side 10b opposite the first side 10a. Such an adhesive interlining 10 is suitable for storage, for example, in roll form. The first release liner 201 and the second release liner 202 are peeled off when the adhesive interlining 10 is used, and are not essential components of the adhesive interlining of the present invention.

[0013] The adhesive interlining according to the embodiment has a thermosetting property. The adhesive interlining preferably has a pressure-sensitive adhesive property so that the adhesive interlining can be temporarily fixed to a garment or the like by pressure-sensitively adhering to the adherend, which is a clothing fabric, before heat curing. "Pressure-sensitive adhesive property" refers to a property that allows the adhesive interlining to be adhered to an adherend by applying pressure. Note that pressure-sensitive adhesion and adhesion are used in the same sense. The pressure-sensitive adhesive property of the adhesive interlining gives it the suitability for temporary attachment of the adhesive interlining to the clothing fabric of the woven fabric product. The ability to temporarily attach the adhesive interlining makes it easy to accurately attach the adhesive interlining to the clothing fabric of the woven fabric product at the desired position.

[0014] The adhesive interlining of the embodiment has thermosetting properties, and therefore can provide the necessary strength (i.e. stiffness) as an interlining. In addition, by pressing the adhesive interlining against the clothing fabric, which is the adherend, the adhesive interlining deforms along the adherend, and an anchor effect occurs between the adhesive interlining and the adherend, which is thought to enable strong adhesion to the adherend.

[0015] The adhesive interlining may be made of one layer (single layer) or two or more layers, but is preferably made of one layer from the viewpoint of simplifying the manufacturing process. When made of multiple layers, these multiple layers may be the same or different, and the combination of these multiple layers is not particularly limited.

[0016] The thickness of the adhesive interlining is not particularly limited, but is preferably 1 to 1000 μm, more preferably 5 to 500 μm, further preferably 10 to 100 μm, and particularly preferably 20 to 80 μm.

[0017] Here, the thickness of the adhesive interlining means the thickness of the entire adhesive interlining, and for example, the thickness of an adhesive interlining consisting of multiple layers means the total thickness of all the layers that make up the adhesive interlining.

[0018] <Composition for forming adhesive interlining> The thermosetting adhesive interlining can be formed using a composition for forming the adhesive interlining, which contains the components that constitute the adhesive interlining. The ratio of the contents of the above-mentioned components in the adhesive interlining is usually the same as the ratio of the contents of the components, excluding the solvent, in the composition for forming the adhesive interlining.

[0019] In the adhesive interlining, the proportion of the total content of one or more of the components described below in the adhesive interlining relative to the total mass of the adhesive interlining does not exceed 100 mass%. Similarly, in the composition for forming an adhesive interlining, the ratio of the total content of one or more of the components contained in the composition for forming an adhesive interlining, as described below, to the total mass of the composition for forming an adhesive interlining does not exceed 100 mass%. The components of the adhesive interlining and the composition for forming the adhesive interlining will be described in detail below.

[0020] The adhesive interlining and the composition for forming the adhesive interlining contain an acrylic polymer (a) having an epoxy group and a heat curing agent (b), and are thermosetting. The adhesive interlining and the composition for forming the adhesive interlining preferably contain an acrylic polymer (a), a heat curing agent (b), and a heat curing accelerator (c), and more preferably contain an acrylic polymer (a), a heat curing agent (b), a heat curing accelerator (c), and an epoxy resin (d).

[0021] <Acrylic polymer (a)> The adhesive interlining and the composition for forming the adhesive interlining contain an acrylic polymer (a) having an epoxy group. Examples of the acrylic polymer (a) include an acrylic copolymer containing a constituent unit derived from a monomer having an epoxy group and a constituent unit derived from an alkyl (meth)acrylate ester.

[0022] An example of a structural unit derived from a monomer having an epoxy group is (meth)acrylic acid having an epoxy group, with glycidyl (meth)acrylate being preferred.

[0023] In the acrylic polymer (a), the content of the structural units derived from monomers having an epoxy group is preferably 1 to 35 mass%, more preferably 2 to 32 mass%, and particularly preferably 3 to 30 mass%, based on the total amount of the structural units.

[0024] In this specification, the term "(meth)acrylic acid" is a concept that encompasses both "acrylic acid" and "methacrylic acid." The same applies to terms similar to (meth)acrylic acid.

[0025] The (meth)acrylic acid alkyl ester may, for example, be one in which the alkyl group constituting the alkyl ester has 1 to 20 carbon atoms, and the alkyl group is preferably linear or branched. More specifically, the (meth)acrylic acid alkyl esters include methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, n-octyl (meth)acrylate, n-methyl ... -nonyl, isononyl (meth)acrylate, decyl (meth)acrylate, undecyl (meth)acrylate, dodecyl (meth)acrylate (lauryl (meth)acrylate), tridecyl (meth)acrylate, tetradecyl (meth)acrylate (myristyl (meth)acrylate), pentadecyl (meth)acrylate, hexadecyl (meth)acrylate (palmityl (meth)acrylate), heptadecyl (meth)acrylate, octadecyl (meth)acrylate (stearyl (meth)acrylate), nonadecyl (meth)acrylate, and icosyl (meth)acrylate.

[0026] From the viewpoint of improving the adhesive strength of the thermosetting adhesive interlining, it is preferable that the acrylic polymer has a structural unit derived from a (meth)acrylic acid alkyl ester in which the alkyl group has 4 or more carbon atoms. And, from the viewpoint of further improving the adhesive strength of the thermosetting adhesive interlining, the alkyl group preferably has 4 to 12 carbon atoms, and more preferably has 4 to 8 carbon atoms. Also, it is preferable that the (meth)acrylic acid alkyl ester in which the alkyl group has 4 or more carbon atoms is an acrylic acid alkyl ester.

[0027] In the acrylic polymer (a), the content of the structural units derived from an alkyl (meth)acrylate is preferably 35 to 99 mass%, more preferably 50 to 98 mass%, and particularly preferably 65 to 95 mass%, based on the total amount of structural units.

[0028] The acrylic polymer preferably further contains a constituent unit derived from a monomer containing a functional group other than an epoxy group, in addition to the constituent unit derived from an alkyl (meth)acrylate.

[0029] Examples of the functional group in the functional group-containing monomer include a hydroxyl group, an amino group, and the like other than an epoxy group. That is, examples of functional group-containing monomers include hydroxyl group-containing monomers and amino group-containing monomers.

[0030] Examples of the hydroxyl group-containing monomer include hydroxyalkyl (meth)acrylates such as hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate; and non-(meth)acrylic unsaturated alcohols (unsaturated alcohols not having a (meth)acryloyl skeleton) such as vinyl alcohol and allyl alcohol.

[0031] The functional group-containing monomer constituting the acrylic polymer may be of only one type, or of two or more types. When two or more types are used, the combination and ratio thereof can be selected arbitrarily.

[0032] In the acrylic polymer (a), the content of structural units derived from functional group-containing monomers other than structural units derived from monomers having an epoxy group is preferably 1 to 35 mass%, more preferably 2 to 32 mass%, and particularly preferably 3 to 30 mass%, based on the total amount of structural units.

[0033] The acrylic polymer (a) may further contain a structural unit derived from another monomer, in addition to the structural unit derived from a monomer having an epoxy group, the structural unit derived from an alkyl (meth)acrylate ester, and the structural unit derived from a functional group-containing monomer. The other monomer is not particularly limited as long as it is copolymerizable with the (meth)acrylic acid alkyl ester and the like. Examples of the other monomers include styrene, α-methylstyrene, vinyl toluene, vinyl formate, vinyl acetate, acrylonitrile, and acrylamide.

[0034] The other monomer constituting the acrylic polymer (a) may be of only one type, or of two or more types. When two or more types are used, the combination and ratio thereof can be selected arbitrarily.

[0035] The weight average molecular weight (Mw) of the acrylic polymer (a) is preferably 10,000 to 2,000,000, and may be, for example, any one of 10,000 to 1,000,000, 1,000,000 to 2,000,000, and 200,000 to 1,200,000. When the weight average molecular weight of the acrylic polymer (a) is within such a range, it becomes easy to adjust the adhesive strength of the thermosetting adhesive interlining to a preferred range.

[0036] In this specification, the terms "weight average molecular weight (Mw)" and "number average molecular weight (Mn)" are polystyrene-equivalent values ​​measured by gel permeation chromatography (GPC) unless otherwise specified.

[0037] The content of the structural units derived from 2-ethylhexyl acrylate is preferably 30% by mass or more, more preferably 30 to 70% by mass, and even more preferably 35 to 65% by mass, relative to 100% by mass of the acrylic polymer (a). Since 2-ethylhexyl acrylate has a low glass transition temperature, by making the content of the structural units derived from 2-ethylhexyl acrylate in the acrylic polymer (a) equal to or more than the lower limit, the adhesiveness of the thermosetting adhesive interlining can be effectively increased.

[0038] The constitutional units contained in the acrylic polymer (a) may be of only one type, or may be of two or more types. When there are two or more types, the combination and ratio thereof can be selected arbitrarily.

[0039] The content of the acrylic polymer (a) relative to the total mass of the adhesive interlining may be 40 to 99 mass %, may be 43 to 99 mass %, or may be 45 to 99 mass %. When the content ratio of the acrylic polymer (a) is equal to or more than the lower limit, the structure of the adhesive interlining becomes more stable and the above-mentioned effects are easily achieved, and when the content of the acrylic resin (a) is equal to or less than the upper limit, the heat-sensitive adhesiveness of the adhesive interlining becomes good.

[0040] <Thermal hardener (b)> The adhesive interlining and the composition for forming the adhesive interlining contain a heat curing agent (b). The heat curing agent (b) is a heat curing agent for the acrylic polymer (a) having an epoxy group. The thermosetting agent (b) contained in the adhesive interlining and the composition for forming the adhesive interlining may be one type or two or more types. When there are two or more types, the combination and ratio thereof can be selected arbitrarily.

[0041] The thermosetting agent (b) may be, for example, a compound having two or more functional groups capable of reacting with an epoxy group in one molecule. Examples of the functional group include a phenolic hydroxyl group, an alcoholic hydroxyl group, an amino group, a carboxyl group, and an anhydride group of an acid group, and the like. A phenolic hydroxyl group, an amino group, or an anhydride group of an acid group is preferable, and a phenolic hydroxyl group or an amino group is more preferable.

[0042] Among the heat curing agents (b), examples of phenolic curing agents having a phenolic hydroxyl group include polyfunctional phenolic resins, biphenols, novolac-type phenolic resins, dicyclopentadiene-type phenolic resins, and aralkyl-type phenolic resins. Among the heat curing agents (b), examples of amine-based curing agents having an amino group include dicyandiamide.

[0043] The heat curing agent (b) may have an unsaturated hydrocarbon group. Examples of the thermosetting agent (b) having an unsaturated hydrocarbon group include a compound in which some of the hydroxyl groups of a phenol resin are substituted with a group having an unsaturated hydrocarbon group, and a compound in which a group having an unsaturated hydrocarbon group is directly bonded to an aromatic ring of a phenol resin.

[0044] Of the thermosetting agents (b), the number average molecular weight of resin components such as polyfunctional phenol resins, novolac-type phenol resins, dicyclopentadiene-type phenol resins, and aralkyl-type phenol resins is preferably 300 to 30,000, more preferably 400 to 10,000, and particularly preferably 500 to 3,000. Of the thermosetting agent (b), the molecular weight of the non-resin components, such as biphenol and dicyandiamide, is not particularly limited, but is preferably 60 to 500, for example. The heat curing agent (b) is preferably represented by the following general formula (1), more specifically, an o-cresol type novolak resin.

[0045] [ka]

[0046] In general formula (1), n ​​is an integer of 1 or more, and may be, for example, any one of 2 or more, 4 or more, and 6 or more. The upper limit of n is not particularly limited as long as it does not impair the effects of the present invention. For example, an o-cresol novolak resin in which n is 10 or less is easier to produce or obtain.

[0047] In general formula (1), the bonding position of the methylene group (-CH2-) linking the o-cresol-diyl groups (-C6H4(-OH)(-CH3)-) to each other with respect to these o-cresol-diyl groups is not particularly limited.

[0048] In the adhesive interlining and the composition for forming the adhesive interlining, the content of the thermosetting agent (b) is preferably 0.05 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, and even more preferably 0.5 to 4 parts by mass, relative to 100 parts by mass of the acrylic polymer (a). When the content of the thermosetting agent (b) is equal to or more than the lower limit, the effect of using the thermosetting agent (b) can be more significantly obtained.

[0049] <Heat curing accelerator (c)> The heat curing accelerator (c) is a component for adjusting the curing speed during the heat-sensitive bonding of the adhesive interlining. Preferred examples of the heat curing accelerator (c) include tertiary amines such as triethylenediamine, benzyldimethylamine, triethanolamine, dimethylaminoethanol, and tris(dimethylaminomethyl)phenol; imidazoles (imidazoles in which one or more hydrogen atoms are substituted with groups other than hydrogen atoms) such as 2-methylimidazole, 2-phenylimidazole, 2-phenyl-4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, and 2-phenyl-4-methyl-5-hydroxymethylimidazole; organic phosphines (phosphines in which one or more hydrogen atoms are substituted with organic groups) such as tributylphosphine, diphenylphosphine, and triphenylphosphine; and tetraphenylboron salts such as tetraphenylphosphonium tetraphenylborate and triphenylphosphine tetraphenylborate.

[0050] The thermal curing accelerator (c) contained in the adhesive interlining and the composition for forming the adhesive interlining may be one type or two or more types. When there are two or more types, the combination and ratio thereof can be selected arbitrarily.

[0051] When the heat curing accelerator (c) is used, the content of the heat curing accelerator (c) in the adhesive interlining and the composition for forming the adhesive interlining is preferably 0.05 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, and even more preferably 0.5 to 4 parts by mass, relative to 100 parts by mass of the acrylic polymer (a). When the content of the heat curing accelerator (c) is equal to or more than the lower limit, the effect of using the heat curing accelerator (c) can be more significantly obtained.

[0052] <Epoxy resin (d)> The adhesive interlining and the composition for forming the adhesive interlining preferably further contain an epoxy resin (d). The epoxy resin (d) does not include an acrylic polymer (a) having an epoxy group. The epoxy resin (d) may be any known one, such as a polyfunctional epoxy resin, a biphenyl compound, bisphenol A diglycidyl ether and its hydrogenated product, an o-cresol novolac type epoxy resin, a dicyclopentadiene type epoxy resin, a biphenyl type epoxy resin, a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a phenylene skeleton type epoxy resin, etc. In this specification, the epoxy resin (d) refers to a curable, i.e., an uncured, epoxy resin.

[0053] The number average molecular weight of the epoxy resin (d) is not particularly limited, but from the viewpoints of the curability of the adhesive interlining and the strength and heat resistance of the thermoset product of the adhesive interlining, it is preferably 300 to 30,000, more preferably 400 to 10,000, and particularly preferably 500 to 3,000.

[0054] The epoxy equivalent of the epoxy resin (d) is preferably from 100 to 1000 g / eq, and more preferably from 150 to 800 g / eq.

[0055] The epoxy resin (d) contained in the adhesive interlining and the composition for forming the adhesive interlining may be one type or two or more types, and when there are two or more types, the combination and ratio thereof can be selected arbitrarily.

[0056] When the adhesive interlining and the composition for forming the adhesive interlining contain an epoxy resin (d), the content of the epoxy resin (d) is preferably 15 to 150 parts by mass, more preferably 30 to 135 parts by mass, and particularly preferably 45 to 115 parts by mass, per 100 parts by mass of the acrylic polymer (a). The epoxy resin (d) may be an epoxy resin that is liquid at room temperature, or may be an epoxy resin that is solid at room temperature.

[0057] <Release liner> The adhesive interlining 10 of the embodiment can be formed on a single release liner, or can be provided in a form laminated between two release liners, a first release liner 201 and a second release liner 202, as shown in FIG.

[0058] The release liner is not particularly limited, and generally, a known release liner with a release treatment on one side of the sheet can be appropriately selected and used. Examples of liners that can be used as the release liner include paper such as glassine paper, wood-free paper, and craft paper, laminated paper obtained by laminating thermoplastic resin such as polyethylene on these papers, polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polyolefin films such as polyethylene and polypropylene.

[0059] Examples of release treatment agents for performing the release treatment include silicone, long-chain alkyl resins, and fluorine-based resins. The thickness of the release liner is not particularly limited, but is preferably from 10 to 150 μm, and more preferably from 20 to 130 μm.

[0060] <Method of manufacturing adhesive interlining> The adhesive interlining can be formed from a composition for forming an adhesive interlining.

[0061] For example, a composition for forming an adhesive interlining, which contains the components constituting the adhesive interlining and, if desired, a solvent, is applied onto the first release liner 201 using various coaters such as a roll coater, knife coater, roll knife coater, air knife coater, die coater, bar coater, gravure coater, curtain coater, etc., and then dried to obtain a laminate A in which the first release liner 201 and the adhesive interlining 10 are laminated.

[0062] The drying conditions for the adhesive interlining composition are not particularly limited, but when the adhesive interlining composition contains a solvent, it is preferable to heat-dry the adhesive interlining composition. The adhesive interlining composition containing a solvent is preferably dried, for example, at 70 to 100° C. for 10 seconds to 5 minutes.

[0063] Next, the release-treated surface of the second release liner 202 is pressed against the surface 10b of the adhesive interlining 10 of the laminate A produced above, thereby producing an adhesive interlining laminate in which the first release liner 201, the adhesive interlining 10, and the second release liner 202 are laminated in this order.

[0064] How to use adhesive interlining A method of using the adhesive interlining of the present invention includes a step of pressure-sensitively adhering the adhesive interlining according to the above-mentioned embodiment to a clothing fabric, and a step of heating the pressure-sensitively adhered adhesive interlining to thermally cure it.

[0065] Examples of the clothing fabric to be adhered include clothing fabrics for woven products such as jackets, blazers, slacks, and skirts.

[0066] In the process of pressure-sensitively adhering the adhesive interlining to the clothing fabric, the adhesive interlining is brought into contact with the clothing fabric, which is the adherend, and pressure-bonded.

[0067] Next, in the process of heating and thermosetting the pressure-sensitively bonded adhesive interlining, heat and pressure bonding (bonding by applying heat and pressure) using an iron, press, or the like can be adopted. The temperature for thermosetting can be appropriately determined depending on the composition of the adhesive layer, and the adhesive layer can be heated at a temperature equal to or higher than the thermosetting temperature to exhibit heat-sensitive adhesion. The pressure on the adhesive interlining is 0.1 to 10 kgf / cm. 2 The extent can be illustrated. EXAMPLES

[0068] The present invention will now be described in more detail with reference to examples, but the present invention is not limited to the following examples.

[0069] <Monomer> The full names of the raw material monomers used to produce the acrylic copolymer, which are abbreviated in the Examples and Comparative Examples, are shown below. 2EHA: 2-ethylhexyl acrylate BA: n-butyl acrylate MMA: Methyl methacrylate GMA: glycidyl methacrylate HEA: 2-hydroxyethyl acrylate

[0070] <Raw materials for producing the adhesive interlining composition> In the present examples and comparative examples, the raw materials used in the production of the adhesive interlining forming composition are shown below.

[0071] [Acrylic polymer (a)] (a)-1:2 Acrylic polymer (weight average molecular weight 400,000, glass transition temperature -47°C) obtained by copolymerizing EHA (40 parts by mass), BA (40 parts by mass), MMA (10 parts by mass), GMA (5 parts by mass) and HEA (5 parts by mass). (a)-2:2 Acrylic polymer (weight average molecular weight 400,000, glass transition temperature -46°C) obtained by copolymerizing EHA (40 parts by mass), BA (40 parts by mass), MMA (15 parts by mass) and HEA (5 parts by mass).

[0072] [Thermal hardener (b)] (b)-1: o-cresol novolak resin (DIC Corporation, "Phenolite (registered trademark) KA-1160", hydroxyl equivalent 117 g / eq, softening point 81 to 90° C.)

[0073] [Thermal curing accelerator (c)] (c)-1: 2-phenyl-4,5-dihydroxymethylimidazole ("Curezol (registered trademark) 2PHZ-PW" manufactured by Shikoku Chemical Industry Co., Ltd., melting point 230°C)

[0074] [Epoxy resin (d)] (d)-1: Dicyclopentadiene type epoxy resin (DIC Corporation "Epicron HP-7200HH", softening point 88-98°C, epoxy equivalent 274-286g / eq) (d)-2: o-cresol novolac type epoxy resin ("EOCN-102S" manufactured by Nippon Kayaku Co., Ltd., epoxy equivalent 205-217g / eq, softening point 55-77°C)

[0075] <Preparation of adhesive interlining> [Example 1] 100 parts by mass of acrylic polymer (a)-1 (composition: 2EHA / BA / MMA / GMA / HEA=40 / 40 / 10 / 5 / 5), 1 part by mass of heat curing agent (b)-1 (o-cresol type novolac resin, hydroxyl group equivalent 117 g / eq), and 1 part by mass of heat curing accelerator (c)-1 (2-phenyl-4,5-dihydroxymethylimidazole) were mixed and diluted with toluene to obtain a composition for forming an adhesive interlining having a total concentration of all the above-mentioned components of 20% by mass. The obtained adhesive interlining composition was applied to a release liner of a polyethylene terephthalate (PET) film, one side of which had been subjected to a release treatment by silicone treatment, so that the thickness after drying would be 50 μm, and then dried at 90° C. for 2 minutes to form the adhesive interlining of Example 1. Another release liner was further attached to the surface of the obtained adhesive interlining opposite to the release liner, to produce an adhesive interlining laminate in which the release liner, adhesive interlining, and release liner were laminated in this order.

[0076] [Example 2] An adhesive interlining and an adhesive interlining laminate according to Example 2 were produced in the same manner as in Example 1, except that a composition for forming an adhesive interlining having a concentration of 20% by mass was used, which was obtained by mixing 100 parts by mass of the acrylic polymer (a)-1 (composition: 2EHA / BA / MMA / GMA / HEA=40 / 40 / 10 / 5 / 5), 1 part by mass of the heat curing agent (b)-1, and 1 part by mass of the heat curing accelerator (c)-1 used in Example 1, with 110 parts by mass of a dicyclopentadiene type epoxy resin (d)-1 (softening point 88-98°C, epoxy equivalent 274-286g / eq) and diluting with toluene.

[0077] [Example 3] The adhesive interlining and adhesive interlining laminate of Example 3 were produced in the same manner as in Example 1, except that a composition for forming an adhesive interlining having a total concentration of all the above-mentioned components of 20 mass% was used by mixing 110 parts by mass of o-cresol novolac epoxy resin (d)-2 (softening point 55 to 77°C, epoxy equivalent 205 to 217 g / eq) (softening point: 55 to 77°C, epoxy equivalent: 205 to 217 g / eq) with acrylic polymer (a)-1 (100 parts by mass), heat curing agent (b)-1 (1 part by mass), and heat curing accelerator (c)-1 (1 part by mass) used in Example 1.

[0078] [Example 4] In addition to the acrylic polymer (a)-1 (100 parts by mass), heat curing agent (b)-1 (1 part by mass), and heat curing accelerator (c)-1 (1 part by mass) used in Example 1, 55 parts by mass of dicyclopentadiene type epoxy resin (d)-1 (softening point 88 to 98°C, epoxy equivalent 274 to 286 g / eq) and 55 parts by mass of o-cresol novolac type epoxy resin (d)-2 (softening point 55 to 77°C, epoxy equivalent 205 to 217 g / eq) were mixed and diluted with toluene to produce an adhesive interlining forming composition having a total concentration of all the above-mentioned components of 20 mass%. In the same manner as in Example 1, an adhesive interlining and an adhesive interlining laminate of Example 4 were produced.

[0079] [Comparative Example 1] The adhesive interlining and adhesive interlining laminate of Comparative Example 1 were prepared in the same manner as in Example 1, except that 100 parts by mass of acrylic polymer (a)-2 (composition: 2EHA / BA / MMA / HEA=40 / 40 / 15 / 5) was used instead of 100 parts by mass of the acrylic polymer (a)-1 used in Example 1.

[0080] The compositions of the adhesive interlinings and the compositions for forming the adhesive interlinings of the above-mentioned Examples and Comparative Examples are shown in Table 1. In the table, "-" indicates that the corresponding component is not contained.

[0081] [Table 1]

[0082] [Physical property evaluation] The adhesive interlinings produced in the above Examples and Comparative Examples were subjected to the following physical property evaluations.

[0083] (Measurement of bending resistance of test sheet with adhesive interlining before heat-sensitive bonding) Under conditions of 23°C and 50% RH, each adhesive interlining laminate obtained in the above Examples and Comparative Examples was cut into a size of 20 mm x 40 mm, and one release liner was peeled off. The exposed adhesive interlining was layered on cotton cloth (Kanakin No. 3, obtained from the Japan Standards Association) and bonded together by rolling a rubber roller of mass 2 kg back and forth once, after which the other release liner was peeled off, and the exposed adhesive interlining was layered on cotton cloth (Kanakin No. 3) and bonded together by rolling a rubber roller of mass 2 kg back and forth once to prepare a test sheet with a cotton cloth / adhesive interlining / cotton cloth configuration. The bending resistance of the obtained test sheet was measured in accordance with JIS L 1096:2010 8.22.1 Method A (Gurley method). The measurement results are shown in Table 1.

[0084] (Measurement of bending resistance of test sheet with adhesive interlining attached after heat-sensitive bonding) The obtained test sheet was subjected to a heat seal test under a load of 220 gf / cm using a heat sealer (Heat Seal Tester TP-701, manufactured by Tester Sangyo Co., Ltd.). 2 The adhesive was heated at 150° C. for 30 seconds to obtain a test piece for measuring bending resistance after heat-sensitive bonding. The bending resistance of the obtained test pieces was measured according to JIS L 1096:2010 8.22.1 A method (Gurley method). The higher the bending resistance value, the stronger the stiffness. The measurement results are shown in Table 1.

[0085] The adhesive interlinings of Examples 1 to 5 were fabric-free adhesive interlinings, but had a greater bending resistance after heat-sensitive bonding than before heat-sensitive bonding, and had suitable strength as interlinings.

[0086] The configurations and combinations thereof in each embodiment are merely examples, and additions, omissions, substitutions, and other modifications of the configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited to each embodiment, but is limited only by the scope of the claims. [Explanation of symbols]

[0087] 10... adhesive interlining, 201... first release liner, 202... second release liner

Claims

1. An adhesive interlining used to prevent a fabric product from losing its shape and to improve its shape retention, An adhesive interlining comprising (a) an acrylic polymer having an epoxy group and (b) a thermosetting agent, and having thermosetting properties.

2. The adhesive interlining according to claim 1 , further comprising an epoxy resin (d).

3. 3. The adhesive interlining according to claim 1, wherein the content of the constituent units derived from monomers having an epoxy group in the acrylic polymer (a) is 1 to 35% by mass based on the total amount of the constituent units.

4. 3. The adhesive interlining according to claim 1, wherein the content of structural units derived from 2-ethylhexyl acrylate in the acrylic polymer (a) is 30 mass % or more based on the total amount of structural units.

5. 3. A method for using an adhesive interlining, comprising the steps of: pressure-sensitively adhering the adhesive interlining according to claim 1 or 2 to a clothing fabric; and heating the pressure-sensitively adhering adhesive interlining to thermally cure it.

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