WO2022030152A1

WO2022030152A1 - Layered body, image display member and manufacturing method thereof, and mobile electronic device and manufacturing method thereof

Info

Publication number: WO2022030152A1
Application number: PCT/JP2021/025059
Authority: WO
Inventors: 躍国于; 浩司設樂
Original assignee: 日東電工株式会社
Priority date: 2020-08-05
Filing date: 2021-07-02
Publication date: 2022-02-10
Also published as: CN116056889A; JP2022029549A; KR20230043200A; TW202210289A

Abstract

Provided is a layered body which may suitably be used for a mobile electronic device provided with an image display panel, and which can exhibit both an excellent anti-reflection property from the viewing side and an excellent inspection property from the rear face side. Further provided are: a manufacturing method for an image display member for which such a layered body is used; and a manufacturing method for a mobile electronic device for which such a layered body is used.　The layered body according to an embodiment has three or more layers, including a resin film (1), an adhesive layer (1) and a resin film (2) which are layered in this order, and the layered body has a transmittance of 20%-83%.

Description

Laminates, image display members and their manufacturing methods, and mobile electronic devices and their manufacturing methods

The present invention relates to a laminated body. Typically, the present invention relates to a laminate that can be suitably used for fixing internal members of mobile electronic devices, preventing surface scratches, reinforcing, and the like. The present invention also relates to a method for manufacturing an image display member using such a laminate, and a method for manufacturing a mobile electronic device using such a laminate.

In general, adhesive tapes such as a surface protective film (SPV) and a reinforcing film (RF) are used for the internal members of mobile electronic devices for fixing, preventing surface scratches, reinforcing, and the like (adhesive tapes such as surface protective film (SPV) and reinforcing film (RF)). For example, Patent Document 1).

In recent years, many organic EL displays have been adopted in mobile electronic devices. Since the organic EL display is an ultra-thin and fragile member, the back surface of the organic EL display is protected by a thick cushion material for the purpose of absorbing impact such as dropping. Further, in order to prevent reflection of incident light from the visual recognition side, a black cushion material is generally adopted as this cushion material to absorb the incident light.

Very recently, due to the trend toward thinner mobile electronic devices, there is an increasing demand for mobile electronic devices equipped with an organic EL display that eliminates the thick black cushion material from the back.

The decrease in impact resistance of the organic EL display due to the elimination of the thick black cushion material can be dealt with by a new design such as improving the impact resistance of the housing.

However, if the thick black cushion material is removed, the incident light cannot be absorbed from the viewing side, and the incident light is reflected as it is on the viewing side, so that the inside of the mobile electronic device can be seen.

On the other hand, it is conceivable to place a thin member with low transmittance so that the incident light can be sufficiently absorbed on the back surface of the organic EL display so that the inside of the mobile electronic device cannot be seen. However, in this case, in the manufacturing process, there arises a problem that the inspectability such as the appearance inspection from the back surface side and the foreign matter inspection is deteriorated.

Japanese Unexamined Patent Publication No. 2016-17109

The subject of the present invention is a laminate that can be suitably used for a mobile electronic device provided with an image display panel, and can exhibit both excellent antireflection property from the visual recognition side and excellent inspection property from the back surface side. The purpose is to provide a laminate. Another object of the present invention is to provide a method for manufacturing an image display member using such a laminated body, and a method for manufacturing a mobile electronic device using such a laminated body.

The laminate according to the embodiment of the present invention is
A laminated body having three or more layers having a resin film (1), an adhesive layer (1), and a resin film (2) in this order.
The total light transmittance of the laminated body is 20% to 83%.

The method for manufacturing an image display member according to an embodiment of the present invention is as follows.
A method for manufacturing an image display member using the above-mentioned laminate.
The resin film (1) and the adhesive layer (1) are directly laminated,
A step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1),
The process of attaching the OLED panel to the exposed adhesive layer (1) and
including.

The method for manufacturing a mobile electronic device according to the embodiment of the present invention is as follows.
A method for manufacturing a mobile electronic device using the above-mentioned laminate.
The resin film (1) and the adhesive layer (1) are directly laminated,
A step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1),
The process of attaching the OLED panel to the exposed adhesive layer (1) and
A step of providing the pressure-sensitive adhesive layer (2) on the outermost layer of the laminate on the resin film (2) side when viewed from the pressure-sensitive adhesive layer (1).
A step of bonding the housing to the side of the pressure-sensitive adhesive layer (2) opposite to the side where the resin film (2) exists.
including.

According to the present invention, it is a laminate that can be suitably used for a mobile electronic device provided with an image display panel, and can exhibit both excellent antireflection property from the visual recognition side and excellent inspection property from the back surface side. A laminate can be provided. Further, it is possible to provide a method for manufacturing an image display member using such a laminated body and a method for manufacturing a mobile electronic device using such a laminated body.

It is a schematic sectional drawing of one Embodiment of the laminated body of this invention. It is a schematic sectional drawing of another embodiment of the laminated body of this invention. It is a schematic cross-sectional view which shows the confirmation direction of the antireflection property confirmation. It is a schematic cross-sectional view which shows the confirmation direction of the checkability confirmation.

When the expression "weight" is used in this specification, it may be read as "mass" which is commonly used as an SI system unit indicating weight.

In the present specification, the expression "(meth) acrylic" means "acrylic and / or methacrolein", and the expression "(meth) acrylate" means "acrylate and / or methacrylate". When the expression "(meth) allyl" is used, it means "allyl and / or methacrolein", and when the expression "(meth) acrolein" is used, "acrolein and / or methacrolein" is used. It means "rain".

≪≪1. Laminate ≫≫
The laminate according to the embodiment of the present invention is a laminate having three or more layers having a resin film (1), an adhesive layer (1), and a resin film (2) in this order.

If the laminate according to the embodiment of the present invention has the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2) in this order, any suitable other as long as the effect of the present invention is not impaired. It may have a layer of. Such other layers may be only one layer or two or more layers.

In the laminate according to the embodiment of the present invention, preferably, the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2) are directly laminated in this order. However, any suitable other material may be used between the resin film (1) and the pressure-sensitive adhesive layer (1) and between the pressure-sensitive adhesive layer (1) and the resin film (2) as long as the effects of the present invention are not impaired. Layers may be provided. Such other layers may be only one layer or two or more layers.

In the laminate according to the embodiment of the present invention, preferably, the resin film (1) and the resin film (2) are the outermost layers, respectively.

The number of laminated bodies according to the embodiment of the present invention is preferably 3 to 10 layers, more preferably 3 to 8 layers, still more preferably 3 to 5 layers, and particularly preferably 3 layers. Is.

The total thickness of the laminate according to the embodiment of the present invention is preferably 75 μm to 400 μm, more preferably 100 μm to 350 μm, further preferably 120 μm to 300 μm, and particularly preferably 140 μm to 240 μm.

One embodiment of the laminate of the present invention is a three-layer laminate in which the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2) are directly laminated in this order. Specifically, as shown in FIG. 1, the laminate 100 of the present invention is formed by directly laminating the resin film (1) 10, the pressure-sensitive adhesive layer (1) 20, and the resin film (2) 30 in this order. ..

In one embodiment of the laminate of the present invention shown in FIG. 1, the resin film (1) can be a separator.

As shown in FIG. 1, the laminate according to the embodiment of the present invention is a three-layer laminate in which the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2) are directly laminated in this order. In the case of, the total thickness is preferably 45 μm to 300 μm, more preferably 60 μm to 250 μm, still more preferably 70 μm to 200 μm, and particularly preferably 85 μm to 150 μm.

In another embodiment of the laminate of the present invention, the resin film (1), the pressure-sensitive adhesive layer (1), the resin film (2), the pressure-sensitive adhesive layer (2), and the resin film (3) are directly arranged in this order. It is a five-layer laminated body that is laminated. Specifically, as shown in FIG. 2, the laminate 100 of the present invention includes a resin film (1) 10, an adhesive layer (1) 20, a resin film (2) 30, and an adhesive layer (2) 40. The resin film (3) 50 is directly laminated in this order.

In another embodiment of the laminate of the present invention shown in FIG. 2, the resin film (1) can be a separator.

As shown in FIG. 2, the laminate according to the embodiment of the present invention includes the resin film (1), the pressure-sensitive adhesive layer (1), the resin film (2), the pressure-sensitive adhesive layer (2), and the resin film (3). In the case of a five-layer laminated body which is directly laminated in order, the total thickness thereof is preferably 75 μm to 400 μm, more preferably 100 μm to 350 μm, still more preferably 120 μm to 300 μm, and particularly preferably. Is 140 μm to 240 μm.

Examples of the other layer include a transmittance control layer and the like from the viewpoint that the effect of the present invention can be more exhibited. As the transmittance control layer, any appropriate layer may be adopted as long as it is a layer capable of controlling the transmittance. Examples of such a transmittance control layer include a black tape layer and a black printing layer.

The permeability control layer is, for example, a surface of the resin film (1) opposite to the pressure-sensitive adhesive layer (1), a surface of the resin film (1) on the pressure-sensitive adhesive layer (1) side, and a resin of the pressure-sensitive adhesive layer (1). The surface on the film (1) side, the surface on the resin film (2) side of the pressure-sensitive adhesive layer (1), the surface on the pressure-sensitive adhesive layer (1) side of the resin film (2), the pressure-sensitive adhesive layer of the resin film (2) ( 2) Side surface, resin film (2) side surface of adhesive layer (2), resin film (3) side surface of adhesive layer (2), adhesive layer (2) of resin film (3) Examples thereof include a side surface, a surface opposite to the pressure-sensitive adhesive layer (2) of the resin film (3), and the like.

The laminate according to the embodiment of the present invention has a total light transmittance of 20% to 83%, preferably 30% to 83%, more preferably 50% to 83%, and particularly preferably 60. % -83%. If the total light transmittance of the laminated body according to the embodiment of the present invention is adjusted within the above range, it is preferable that the laminated body can be suitably used for a mobile electronic device provided with an image display panel, and is excellent from the visual recognition side. It can be a laminated body that can exhibit both antireflection property and excellent inspection property from the back surface side. If the total light transmittance of the laminated body according to the embodiment of the present invention is out of the above range and is too low, the inspectability from the back surface side may be deteriorated. If the total light transmittance of the laminated body according to the embodiment of the present invention is too high outside the above range, the antireflection property from the visual recognition side may decrease.

<< 1-1. Resin film (1) ≫
The thickness of the resin film (1) is preferably 20 μm to 100 μm, more preferably 20 μm to 80 μm, still more preferably 20 μm to 70 μm, and particularly preferably 20 μm to 70 μm in that the effects of the present invention can be more exhibited. Is 20 μm to 60 μm, most preferably 25 μm to 50 μm.

The resin film (1) includes a resin base film (1a).

The resin base film (1a) includes, for example, a plastic film composed of a polyester resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); polyethylene (PE), polypropylene ( A plastic film composed of an olefin resin containing α-olefins such as PP), polymethylpentene (PMP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer (EVA) as monomer components; polyvinyl chloride. Plastic film composed of (PVC); Plastic film composed of vinyl acetate resin; Plastic film composed of polycarbonate (PC); Plastic film composed of polyphenylene sulfide (PPS); Polyamide (nylon), all Plastic film composed of amide resin such as aromatic polyamide (aramid); Plastic film composed of polyimide resin; Plastic film composed of polyether ether ketone (PEEK); Polyethylene (PE), Polypropylene (PP) ) Etc.; plastic film composed of olefin resin; polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylfluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer, chlorofluoroethylene-vinylidene fluoride Examples thereof include a plastic film made of a fluororesin such as a copolymer; and the like.

The resin base film (1a) may have only one layer or two or more layers. The resin base film (1a) may be a stretched one.

The resin base film (1a) may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-voltage impact exposure, ionizing radiation treatment, coating treatment with an undercoat agent, and the like.

The resin base film (1a) may contain any suitable additive as long as the effect of the present invention is not impaired. Such an additive may be only one kind or two or more kinds. However, from the viewpoint that the effect of the present invention can be more exhibited, the content ratio of the additive in the resin base film (1a) is preferably 5% by weight or less, more preferably 3% by weight or less, and further. It is preferably 1% by weight or less, particularly preferably 0.5% by weight or less, and most preferably substantially 0% by weight. Here, "substantially 0% by weight" means that the content of a trace amount of impurities within a range that does not impair the effect of the present invention can be ignored.

Examples of the additive include at least one selected from the group consisting of colored pigments and colored dyes. The coloring pigment preferably includes a black pigment. The coloring dye preferably includes a black dye.

When the resin base film (1a) contains at least one selected from the group consisting of colored pigments and colored dyes, the content ratio thereof is preferably 0.001 in that the effects of the present invention can be more exhibited. It is from% by weight to 5% by weight, more preferably 0.001% by weight to 3% by weight, still more preferably 0.001% by weight to 1% by weight.

The resin film (1) may have a release layer (1b) in order to enhance the releasability from the pressure-sensitive adhesive layer (1). When the resin film (1) has the release layer (1b), the side of the release layer (1b) is directly laminated on the pressure-sensitive adhesive layer (1).

As the material for forming the release layer (1b), any appropriate forming material can be adopted as long as the effect of the present invention is not impaired. Examples of such forming materials include silicone-based mold release agents, fluorine-based mold release agents, long-chain alkyl-based mold release agents, fatty acid amide-based mold release agents, and the like. Among these, a silicone-based mold release agent is preferable. The release layer (1b) can be formed as a coating layer.

As the thickness of the release layer (1b), any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired. Such a thickness is preferably 10 nm to 1000 nm, more preferably 10 nm to 800 nm, still more preferably 10 nm to 600 nm, and particularly preferably 10 nm to 500 nm.

The release layer (1b) may be only one layer or two or more layers.

Examples of the silicone-based release layer include an addition reaction type silicone resin. Specific examples of the addition reaction type silicone resin include, for example, KS-774, KS-775, KS-778, KS-779H, KS-847H, KS-847T manufactured by Shin-Etsu Chemical Co., Ltd .; TPR-manufactured by Toshiba Silicone Co., Ltd. 6700, TPR-6710, TPR-6721; SD7220, SD7226 manufactured by Toray Dow Corning; and the like. The coating amount (after drying) of the silicone-based release layer is preferably 0.01 g / m ² to 2 g / m ² , more preferably 0.01 g / m ² to 1 g / m ² , and even more preferably 0.01 g / m 2 to 1 g / m 2. It is 0.01 g / m ² to 0.5 g / m ² .

The release layer (1b) is usually formed from 120 to 120 after the above-mentioned forming material is applied onto any suitable layer by a conventionally known coating method such as a reverse gravure coat, a bar coat, or a die coat. It can be carried out by curing by applying a heat treatment at about 200 ° C. Further, if necessary, heat treatment and activation energy ray irradiation such as ultraviolet irradiation may be used in combination.

The resin film (1) may have an antistatic layer (1c).

As the thickness of the antistatic layer (1c), any appropriate thickness can be adopted as long as the effect of the present invention is not impaired. Such a thickness is preferably 1 nm to 500 nm, more preferably 5 nm to 300 nm, still more preferably 7.5 nm to 200 nm, and particularly preferably 10 nm to 100 nm.

The antistatic layer (1c) may be only one layer or two or more layers.

As the antistatic layer (1c), any appropriate antistatic layer can be adopted as long as it can exert an antistatic effect, as long as the effect of the present invention is not impaired. Such an antistatic layer is preferably an antistatic layer formed by coating an arbitrary suitable base material layer with a conductive coating liquid containing a conductive polymer. Specifically, for example, it is an antistatic layer formed by coating a conductive coating liquid containing a conductive polymer on a resin base film (1a). Specific coating methods include a roll coating method, a bar coating method, and a gravure coating method.

As the conductive polymer, any suitable conductive polymer can be adopted as long as the effect of the present invention is not impaired. Examples of such a conductive polymer include a conductive polymer obtained by doping a π-conjugated conductive polymer with a polyanion. Examples of the π-conjugated conductive polymer include chain conductive polymers such as polythiophene, polypyrrole, polyaniline, and polyacetylene. Examples of the polyanion include polystyrene sulfonic acid, polyisoprene sulfonic acid, polyvinyl sulfonic acid, polyallyl sulfonic acid, ethyl acrylate sulfonic acid, polymethacrylic carboxylic acid and the like. The conductive polymer may be only one kind or two or more kinds.

One embodiment of the resin film (1) includes a resin base film (1a), an antistatic layer (1c), and a release layer (1b) in this order. Typically, this embodiment comprises a resin base film (1a), an antistatic layer (1c), and a release layer (1b).

Another embodiment of the resin film (1) includes an antistatic layer (1c), a resin base film (1a), an antistatic layer (1c), and a release layer (1b) in this order. Typically, this embodiment comprises an antistatic layer (1c), a resin substrate film (1a), an antistatic layer (1c), and a release layer (1b).

≪1-2. Adhesive layer (1) ≫
As the pressure-sensitive adhesive layer (1), any suitable pressure-sensitive adhesive layer may be adopted as long as the effects of the present invention are not impaired. The pressure-sensitive adhesive layer (1) may be only one layer or two or more layers.

The thickness of the pressure-sensitive adhesive layer (1) is preferably 5 μm to 75 μm, more preferably 5 μm to 60 μm, still more preferably 7 μm to 50 μm, and particularly preferably, in that the effect of the present invention can be more exhibited. Is 7 μm to 40 μm, most preferably 10 μm to 30 μm.

The pressure-sensitive adhesive layer (1) is preferably composed of at least one selected from the group consisting of an acrylic pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive.

The pressure-sensitive adhesive layer (1) can be formed by any suitable method. As such a method, for example, at least one selected from the group consisting of a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, silicone-based pressure-sensitive adhesive composition). ) Is applied on any suitable base material (for example, resin film (2)), heated and dried as necessary, and cured as necessary to form an adhesive layer on the base material. There is a way to do it. Examples of such an application method include a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, an air knife coater, a spray coater, a comma coater, a direct coater, and a roll brush coater. Method can be mentioned.

The pressure-sensitive adhesive layer (1) may contain a conductive component. The conductive component may be only one kind or two or more kinds.

The pressure-sensitive adhesive layer (1) may contain any suitable additive as long as the effect of the present invention is not impaired. Such an additive may be only one kind or two or more kinds.

From the viewpoint of further exhibiting the effects of the present invention, the pressure-sensitive adhesive layer (1) contains, as the additive, at least one selected from the group consisting of a coloring pigment and a coloring dye. The coloring pigment preferably includes a black pigment. The coloring dye preferably includes a black dye. That is, the pressure-sensitive adhesive layer (1) is more preferably at least one selected from the group consisting of black pigments and black dyes as the additive.

When the pressure-sensitive adhesive layer (1) contains at least one selected from the group consisting of a coloring pigment and a coloring dye, the content ratio of at least one selected from the group consisting of a coloring pigment and a coloring dye is the content ratio of the pressure-sensitive adhesive layer (1). ) Is formed (at least one selected from the group consisting of an acrylic pressure-sensitive adhesive composition, a urethane-based pressure-sensitive adhesive composition, a rubber-based pressure-sensitive adhesive composition, and a silicone-based pressure-sensitive adhesive composition). The effect of the present invention can be more exhibited with respect to the components, preferably 0.01% by weight to 5% by weight, more preferably 0.01% by weight to 3% by weight, still more preferably 0. It is 0.05% by weight to 2% by weight, particularly preferably 0.08% by weight to 1.5% by weight, and most preferably 0.1% by weight to 1% by weight. The "polymer component" referred to here is at least one selected from the group consisting of an acrylic polymer in the case of an acrylic pressure-sensitive adhesive composition, a urethane prepolymer and a polyol in the case of a urethane-based pressure-sensitive adhesive composition, and rubber. In the case of a based pressure-sensitive adhesive composition, it is a rubber-based polymer, and in the case of a silicone-based pressure-sensitive adhesive composition, it is a silicone-based polymer.

<1-2-1. Acrylic adhesive>
The acrylic pressure-sensitive adhesive is formed from an acrylic pressure-sensitive adhesive composition.

The acrylic pressure-sensitive adhesive composition preferably contains an acrylic polymer and a cross-linking agent in that the effects of the present invention can be more exhibited.

Acrylic polymers can be referred to as so-called base polymers in the field of acrylic pressure-sensitive adhesives. The acrylic polymer may be only one kind or two or more kinds.

The content ratio of the acrylic polymer in the acrylic pressure-sensitive adhesive composition is preferably 60% by weight to 99.9% by weight, more preferably 65% by weight to 99.9% by weight, in terms of solid content. It is more preferably 70% by weight to 99.9% by weight, particularly preferably 75% by weight to 99.9% by weight, and most preferably 80% by weight to 99.9% by weight.

As the acrylic polymer, any suitable acrylic polymer can be adopted as long as the effect of the present invention is not impaired.

The weight average molecular weight of the acrylic polymer is preferably 300,000 to 2.5 million, more preferably 350,000 to 2 million, and further preferably 400,000 to 1.8 million in that the effect of the present invention can be more exhibited. It is particularly preferably 500,000 to 1,500,000.

As the acrylic polymer, a (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms in the alkyl group of the (component a) alkyl ester moiety is preferable in that the effect of the present invention can be more exhibited. A acrylic polymer formed by polymerization from the composition (A) containing at least one selected from the group consisting of (meth) acrylic acid ester having a component) OH group and (meth) acrylic acid. The (a component) and (b component) may be independently one kind or two or more kinds, respectively.

Examples of the (meth) acrylic acid alkyl ester (component a) in which the alkyl group of the alkyl ester moiety has 4 to 12 carbon atoms include n-butyl (meth) acrylic acid, isobutyl (meth) acrylic acid, and (meth). S-butyl acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, 2--octyl (meth) acrylate Ethylhexyl, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate And so on. Among these, n-butyl (meth) acrylate and 2-ethylhexyl (meth) acrylate are preferable, and n-butyl acrylate and acrylic are more preferable in that the effects of the present invention can be further exhibited. 2-Ethylhexyl acid.

As at least one (b component) selected from the group consisting of (meth) acrylic acid ester having an OH group and (meth) acrylic acid, for example, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and the like. Examples thereof include (meth) acrylic acid ester having an OH group such as hydroxybutyl (meth) acrylic acid, and (meth) acrylic acid. Among these, hydroxyethyl (meth) acrylate and (meth) acrylic acid are preferable, and hydroxyethyl acrylate and acrylic acid are more preferable, in that the effects of the present invention can be more exhibited.

The composition (A) may contain a copolymerizable monomer other than the component (a) and the component (b). The copolymerizable monomer may be only one kind or two or more kinds. Examples of such a copolymerizable monomer include itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, and acid anhydrides thereof (for example, an acid anhydride group-containing monomer such as maleic anhydride and itaconic anhydride). ) And other carboxyl group-containing monomers (excluding (meth) acrylic acid); (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide. , N-butoxymethyl (meth) acrylamide, N-hydroxyethyl (meth) acrylamide and other amide group-containing monomers; (meth) aminoethyl acrylate, (meth) dimethylaminoethyl acrylate, (meth) t-butyl acrylate Amino group-containing monomers such as aminoethyl; glycidyl (meth) acrylate, epoxy group-containing monomers such as (meth) methyl glycidyl acrylate; cyano group-containing monomers such as acrylonitrile and methacrylonitrile; N-vinyl-2-pyrrolidone, (Meta) Heterocyclic-containing vinyl monomers such as acryloylmorpholine, N-vinylpiperidone, N-vinylpiperazine, N-vinylpyrrole, N-vinylimidazole, vinylpyridine, vinylpyrimidine, vinyloxazole; sulfonic acids such as sodium vinylsulfonate. Group-containing monomer; Phosphoric acid group-containing monomer such as 2-hydroxyethylacryloyl phosphate; Iimide group-containing monomer such as cyclohexylmaleimide and isopropylmaleimide; isocyanate group-containing monomer such as 2-methacryloyloxyethyl isocyanate; Cyclopentyl (meth) acrylate, (Meta) acrylic acid ester having an alicyclic hydrocarbon group such as cyclohexyl (meth) acrylate and isobornyl (meth) acrylate; aromatics such as phenyl (meth) acrylate, phenoxyethyl (meth) acrylate and benzyl (meth) acrylate. (Meta) acrylic acid ester having a hydrocarbon group; vinyl ester such as vinyl acetate and vinyl propionate; aromatic vinyl compound such as styrene and vinyl toluene; olefins and dienes such as ethylene, butadiene, isoprene and isobutylene; vinyl Vinyl ethers such as alkyl ethers; vinyl chloride; and the like can be mentioned.

As the copolymerizable monomer, a polyfunctional monomer can also be adopted. The polyfunctional monomer means a monomer having two or more ethylenically unsaturated groups in one molecule. As the ethylenically unsaturated group, any suitable ethylenically unsaturated group can be adopted as long as the effect of the present invention is not impaired. Examples of such an ethylenically unsaturated group include radically polymerizable functional groups such as a vinyl group, a propenyl group, an isopropenyl group, a vinyl ether group (vinyloxy group) and an allyl ether group (allyloxy group). Examples of the polyfunctional monomer include hexanediol di (meth) acrylate, butanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol. Di (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, trimethyl propanthry (meth) acrylate, tetramethylol methanetri (meth) acrylate, allyl. Examples thereof include (meth) acrylate, vinyl (meth) acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate. Such a polyfunctional monomer may be only one kind, or may be two or more kinds.

As the copolymerizable monomer, (meth) acrylic acid alkoxyalkyl ester can also be adopted. Examples of the (meth) acrylate alkoxyalkyl ester include (meth) acrylate 2-methoxyethyl, (meth) acrylate 2-ethoxyethyl, (meth) acrylate methoxytriethylene glycol, and (meth) acrylate 3-. Examples thereof include methoxypropyl, 3-ethoxypropyl (meth) acrylate, 4-methoxybutyl (meth) acrylate, and 4-ethoxybutyl (meth) acrylate. The (meth) acrylic acid alkoxyalkyl ester may be only one kind or two or more kinds.

The content of the (meth) acrylic acid alkyl ester (component a) in which the alkyl group of the alkyl ester moiety has 4 to 12 carbon atoms is a monomer constituting the acrylic polymer in that the effect of the present invention can be further exhibited. It is preferably 30% by weight or more, more preferably 35% by weight to 99% by weight, still more preferably 40% by weight to 98% by weight, and particularly preferably 50% by weight, based on the total amount of the components (100% by weight). It is from% by weight to 95% by weight.

The content of at least one (b component) selected from the group consisting of (meth) acrylic acid ester having an OH group and (meth) acrylic acid makes the acrylic polymer more effective in terms of exhibiting the effects of the present invention. It is preferably 1% by weight or more, more preferably 1% by weight to 30% by weight, still more preferably 2% by weight to 20% by weight, based on the total amount of the constituent monomer components (100% by weight). It is preferably 3% by weight to 10% by weight.

The composition (A) may contain any suitable other components as long as the effects of the present invention are not impaired. Examples of such other components include polymerization initiators, chain transfer agents, solvents and the like. As the content of these other components, any appropriate content may be adopted as long as the effect of the present invention is not impaired.

As the polymerization initiator, a thermal polymerization initiator, a photopolymerization initiator (photoinitiator), or the like can be adopted depending on the type of the polymerization reaction. The polymerization initiator may be only one kind or two or more kinds.

The thermal polymerization initiator can be preferably used when an acrylic polymer is obtained by solution polymerization. Examples of such a thermal polymerization initiator include an azo-based polymerization initiator, a peroxide-based polymerization initiator (for example, dibenzoyl peroxide, tert-butyl permalate, etc.), a redox-based polymerization initiator, and the like. .. Among these thermal polymerization initiators, the azo-based initiator disclosed in JP-A-2002-69411 is particularly preferable. Such an azo-based polymerization initiator is preferable in that the decomposition product of the polymerization initiator does not easily remain in the acrylic polymer as a portion that causes the generation of heating-generated gas (out gas). Examples of the azo-based polymerization initiator include 2,2'-azobisisobutyronitrile (hereinafter, may be referred to as AIBN) and 2,2'-azobis-2-methylbutyronitrile (hereinafter, referred to as AMBN). , 2,2'-azobis (2-methylpropionic acid) dimethyl, 4,4'-azobis-4-cyanovalerian acid and the like.

The photopolymerization initiator can be preferably used when an acrylic polymer is obtained by active energy ray polymerization. Examples of the photopolymerization initiator include a benzoin ether-based photopolymerization initiator, an acetophenone-based photopolymerization initiator, an α-ketol-based photopolymerization initiator, an aromatic sulfonyl chloride-based photopolymerization initiator, and a photoactive oxime-based photopolymerization initiator. Examples thereof include agents, benzoin-based photopolymerization initiators, benzyl-based photopolymerization initiators, benzophenone-based photopolymerization initiators, ketal-based photopolymerization initiators, thioxanthone-based photopolymerization initiators, and the like.

Examples of the benzoin ether-based photopolymerization initiator include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethan-1-one, and anisole. Examples include methyl ether. Examples of the acetophenone-based photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenylketone, 4-phenoxydichloroacetophenone, and 4- (t-butyl). Examples include dichloroacetophenone. Examples of the α-ketol-based photopolymerization initiator include 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2-methylpropan-1-one, and the like. .. Examples of the aromatic sulfonyl chloride-based photopolymerization initiator include 2-naphthalene sulfonyl chloride and the like. Examples of the photoactive oxime-based photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime. Examples of the benzoin-based photopolymerization initiator include benzoin and the like. Examples of the benzyl-based photopolymerization initiator include benzyl and the like. Examples of the benzophenone-based photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, α-hydroxycyclohexylphenylketone and the like. Examples of the ketal-based photopolymerization initiator include benzyldimethyl ketal and the like. Examples of the thioxanthone-based photopolymerization initiator include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone.

The acrylic pressure-sensitive adhesive composition may contain a cross-linking agent. By using a cross-linking agent, the cohesive force of the acrylic pressure-sensitive adhesive can be improved, and the effect of the present invention can be further exhibited. The cross-linking agent may be only one kind or two or more kinds.

Examples of the cross-linking agent include a polyfunctional isocyanate-based cross-linking agent, an epoxy-based cross-linking agent, a melamine-based cross-linking agent, a peroxide-based cross-linking agent, a urea-based cross-linking agent, a metal alkoxide-based cross-linking agent, a metal chelate-based cross-linking agent, and a metal salt. Examples thereof include a system-based cross-linking agent, a carbodiimide-based cross-linking agent, an oxazoline-based cross-linking agent, an aziridine-based cross-linking agent, and an amine-based cross-linking agent. Among these, at least one (c component) selected from the group consisting of a polyfunctional isocyanate-based cross-linking agent and an epoxy-based cross-linking agent is preferable in that the effects of the present invention can be further exhibited.

Examples of the polyfunctional isocyanate-based cross-linking agent include lower aliphatic polyisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, and 1,6-hexamethylene diisocyanate; cyclopentylene diisocyanate, cyclohexylene diisocyanate, and the like. Alicyclic polyisocyanates such as isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate; 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, etc. Aromatic polyisocyanates and the like. Examples of the polyfunctional isocyanate-based cross-linking agent include trimethylolpropane / tolylene diisocyanate adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name “Coronate L”) and trimethylolpropane / hexamethylene diisocyanate adduct (Nippon Polyurethane Industry Co., Ltd.). Company manufactured, product name "Coronate HL"), product name "Coronate HX" (Nippon Polyurethane Industry Co., Ltd.), trimethylolpropane / xylylene diisocyanate adduct (manufactured by Mitsui Chemicals Co., Ltd., product name "Takenate 110N"), etc. Commercial products are also included.

Examples of the epoxy-based cross-linking agent (polyfunctional epoxy compound) include N, N, N', N'-tetraglycidyl-m-xylene diamine, diglycidyl aniline, and 1,3-bis (N, N-diglycidylamino). Methyl) cyclohexane, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, sorbitol polyglycidyl ether, Glycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylolpropane polyglycidyl ether, adipic acid diglycidyl ester, o-phthalic acid diglycidyl ester, triglycidyl-tris (2- Examples thereof include hydroxyethyl) isocyanurate, resorcin diglycidyl ether, bisphenol-S-diglycidyl ether, and epoxy-based resins having two or more epoxy groups in the molecule. Examples of the epoxy-based cross-linking agent include commercially available products such as the trade name "Tetrad C" (manufactured by Mitsubishi Gas Chemical Company, Inc.).

As the content of the cross-linking agent in the acrylic pressure-sensitive adhesive composition, any appropriate content can be adopted as long as the effect of the present invention is not impaired. The content is preferably 0.05 parts by weight to 20 parts by weight with respect to the solid content (100 parts by weight) of the acrylic polymer, for example, in that the effect of the present invention can be more exhibited. , More preferably 0.1 parts by weight to 18 parts by weight, still more preferably 0.5 parts by weight to 15 parts by weight, and particularly preferably 0.5 parts by weight to 10 parts by weight.

The acrylic pressure-sensitive adhesive composition may contain any suitable other components as long as the effects of the present invention are not impaired. Examples of such other components include polymer components other than acrylic polymers, cross-linking accelerators, cross-linking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, oil-soluble phenols, etc.), and the like. Anti-aging agents, inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, UV absorbers, antioxidants, light stabilizers, chain transfer agents, plasticizers, softeners, Examples thereof include surfactants, antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.

<1-2-2. Urethane adhesive>
As the urethane-based pressure-sensitive adhesive, any suitable urethane-based pressure-sensitive adhesive such as the known urethane-based pressure-sensitive adhesive described in JP-A-2017-039859 can be adopted as long as the effects of the present invention are not impaired. .. The urethane-based pressure-sensitive adhesive is, for example, a urethane-based pressure-sensitive adhesive formed from a urethane-based pressure-sensitive adhesive composition, and the urethane-based pressure-sensitive adhesive composition is selected from the group consisting of urethane prepolymers and polyols. It contains at least one and a cross-linking agent. The urethane-based pressure-sensitive adhesive may be only one kind or two or more kinds. The urethane-based pressure-sensitive adhesive may contain any suitable component as long as the effect of the present invention is not impaired.

<1-2-3. Rubber adhesive>
The rubber-based pressure-sensitive adhesive is typically formed from a rubber-based pressure-sensitive adhesive composition. The rubber-based pressure-sensitive adhesive composition typically contains a rubber-based polymer. As the rubber-based pressure-sensitive adhesive, any suitable rubber-based pressure-sensitive adhesive such as the known rubber-based pressure-sensitive adhesive described in JP-A-2015-074771 can be adopted as long as the effects of the present invention are not impaired. .. These may be only one kind or two or more kinds. The rubber-based pressure-sensitive adhesive may contain any suitable component as long as the effect of the present invention is not impaired.

<1-2-4. Silicone adhesive>
The silicone-based pressure-sensitive adhesive is typically formed from a silicone-based pressure-sensitive adhesive composition. The silicone-based pressure-sensitive adhesive composition typically contains a silicone-based polymer. As the silicone-based pressure-sensitive adhesive, any suitable silicone-based pressure-sensitive adhesive such as the known silicone-based pressure-sensitive adhesive described in JP-A-2014-047280 can be adopted as long as the effects of the present invention are not impaired. .. These may be only one kind or two or more kinds. The silicone-based pressure-sensitive adhesive may contain any suitable component as long as the effect of the present invention is not impaired.

<1-2-5. Conductive component>
The pressure-sensitive adhesive layer (1) may contain a conductive component. Typically, a group consisting of a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, silicone-based pressure-sensitive adhesive composition) which is a material of the pressure-sensitive adhesive layer (1). At least one selected from) may contain a conductive component.

As the conductive component, any appropriate conductive component can be adopted as long as the effect of the present invention is not impaired. Such a conductive component is preferably at least one compound selected from an ionic liquid, an ionic conductive polymer, an ionic conductive filler, and an electrically conductive polymer.

When the pressure-sensitive adhesive composition contains a conductive component, the ratio of the base polymer (for example, acrylic polymer, polyol, urethane prepolymer, rubber polymer, silicone polymer) to the conductive component is such that the conductive component is used. It is preferably 0.01 parts by weight to 10 parts by weight, more preferably 0.05 parts by weight to 9.0 parts by weight, and further preferably 0.075 parts by weight to 8 parts by weight with respect to 100 parts by weight of the base polymer. It is 9.0 parts by weight, and particularly preferably 0.1 parts by weight to 7.0 parts by weight.

As the ionic liquid, any appropriate ionic liquid can be adopted as long as the effect of the present invention is not impaired. Here, the ionic liquid means a molten salt (ionic compound) that exhibits a liquid at 25 ° C. The ionic liquid may be only one kind or two or more kinds.

The ionic liquid as such is preferably an ionic liquid composed of a fluoroorganic anion and an onium cation.

As the onium cation that can form an ionic liquid, any appropriate onium cation can be adopted as long as the effect of the present invention is not impaired. The onium cation is preferably at least one selected from a nitrogen-containing onium cation, a sulfur-containing onium cation, and a phosphorus-containing onium cation.

As the onium cation that can form an ionic liquid, at least one selected from cations having structures represented by the general formulas (1) to (5) is preferable in that the effects of the present invention can be further exhibited. Is.

In the general formula (1), Ra represents a hydrocarbon group having 4 to 20 carbon atoms and may contain a heteroatom, and Rb and Rc are the same or different, hydrogen or a hydrocarbon having 1 to 16 carbon atoms. It represents a hydrogen group and may contain a heteroatom. However, when the nitrogen atom contains a double bond, there is no Rc.

In the general formula (2), Rd represents a hydrocarbon group having 2 to 20 carbon atoms and may contain a heteroatom, and Re, Rf, and Rg are the same or different from hydrogen or 1 carbon atom. It represents 16 hydrocarbon groups and may contain heteroatoms.

In the general formula (3), Rh represents a hydrocarbon group having 2 to 20 carbon atoms and may contain a heteroatom, and Ri, Rj, and Rk are the same or different from hydrogen or 1 carbon atom. It represents 16 hydrocarbon groups and may contain heteroatoms.

In the general formula (4), Z represents a nitrogen atom, a sulfur atom, or a phosphorus atom, and R ₁ , Rm, Rn, and Ro represent a hydrocarbon group having 1 to 20 carbon atoms, which is the same or different. It may contain heteroatoms. However, when Z is a sulfur atom, there is no Ro.

In the general formula (5), X represents a Li atom, a Na atom, or a K atom.

Examples of the cation represented by the general formula (1) include a pyridinium cation, a pyrrolidinium cation, a piperidinium cation, a cation having a pyrroline skeleton, and a cation having a pyrrole skeleton.

Specific examples of the cation represented by the general formula (1) include, for example, 1-ethylpyridinium cation, 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-ethyl-3-methylpyridinium cation, 1-butyl. Pyridinium cations such as -3-methylpyridinium cation, 1-hexyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, 1-octyl-4-methylpyridinium cation; 1-ethyl-1-methylpyrroli Dinium cation, 1-methyl-1-propylpyrridinium cation, 1-methyl-1-butylpyrrolidinium cation, 1-methyl-1-pentylpyrrolidinium cation, 1-methyl-1-hexylpyrrolidinium Nium cation, 1-methyl-1-heptylpyrrolidinium cation, 1-ethyl-1-propylpyrrolidinium cation, 1-ethyl-1-butylpyrrolidinium cation, 1-ethyl-1-pentylpyrrolidinium cation , 1-ethyl-1-hexylpyrridinium cation, 1-ethyl-1-heptylpyrridinium cation and other pyroridinium cations; 1-methyl-1-ethylpiperidinium cation, 1-methyl-1 -To propylpyridinium cation, 1-methyl-1-butylpiperidinium cation, 1-methyl-1-pentylpiperidinium cation, 1-methyl-1-hexylpiperidinium cation, 1-methyl-1- Petilpiperidinium cation, 1-ethyl-1-propylpiperidinium cation, 1-ethyl-1-butylpiperidinium cation, 1-ethyl-1-pentylpiperidinium cation, 1-ethyl-1-hexylpi Pyridinium cations, 1-ethyl-1-heptylpyridinium cations, piperidinium cations such as 1-propyl-1-butylpiperidinium cations; and the like; more preferably 1-hexylpyridinium cations. , 1-ethyl-3-methylpyridinium cation, 1-butyl-3-methylpyridinium cation, 1-octyl-4-methylpyridinium cation, 1-methyl-1-propylpyrrolidinium cation, 1-methyl-1-propyl It is a pyridinium cation.

Examples of the cation represented by the general formula (2) include an imidazolium cation, a tetrahydropyrimidinium cation, and a dihydropyrimidinium cation.

Specific examples of the cation represented by the general formula (2) include 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, 1-ethyl-3-methylimidazolium cation, and 1-butyl. -3-Methylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-decyl-3-methylimidazolium cation, 1-dodecyl-3-methylimidazolium cation It is an imidazolium cation such as a lithium cation or a 1-tetradecyl-3-methylimidazolium cation, and more preferably a 1-ethyl-3-methylimidazolium cation or a 1-hexyl-3-methylimidazolium cation.

Examples of the cation represented by the general formula (3) include a pyrazolium cation and a pyrazolinium cation.

Specific examples of the cation represented by the general formula (3) include 1-methylpyrazolium cation, 3-methylpyrazolium cation, 1-ethyl-2-methylpyrazolinium cation, and 1-ethyl-. Pyrazolium cations such as 2,3,5-trimethylpyrazolium cation, 1-propyl-2,3,5-trimethylpyrazolium cation, 1-butyl-2,3,5-trimethylpyrazolium cation; Pila such as 1-ethyl-2,3,5-trimethylpyrazolinium cation, 1-propyl-2,3,5-trimethylpyrazolinium cation, 1-butyl-2,3,5-trimethylpyrazolinium cation Zolinium cation; and the like.

Examples of the cation represented by the general formula (4) include a tetraalkylammonium cation, a trialkylsulfonium cation, a tetraalkylphosphonium cation, and a part of the above alkyl group is replaced with an alkenyl group, an alkoxyl group, or an epoxy group. The ones that have been done are mentioned.

Specific examples of the cation represented by the general formula (4) include triethylmethylammonium cation, tributylethylammonium cation, trimethyldecylammonium cation, diethylmethylsulfonium cation, dibutylethylsulfonium cation, dimethyldecylsulfonium cation, and triethylmethyl. Asymmetric tetraalkylammonary cations such as phosphonium cations, tributylethylphosphonium cations, trimethyldecylphosphonium cations, trialkylsulfonium cations, tetraalkylphosphonium cations, and N, N-diethyl-N-methyl-N- (2-methoxyethyl). Ammonium cation, glycidyltrimethylammonium cation, diallyldimethylammonium cation, N, N-dimethyl-N-ethyl-N-propylammonary cation, N, N-dimethyl-N-ethyl-N-butylammonium cation, N, N-dimethyl -N-ethyl-N-pentylammonium cation, N, N-dimethyl-N-ethyl-N-hexylammonary cation, N, N-dimethyl-N-ethyl-N-heptylammonium cation, N, N-dimethyl-N -Ethyl-N-nonylammonium cations, N, N-dimethyl-N, N-dipropylammonary cations, N, N-diethyl-N-propyl-N-butylammonium cations, N, N-dimethyl-N-propyl- N-pentylammonium cation, N, N-dimethyl-N-propyl-N-hexylammonium cation, N, N-dimethyl-N-propyl-N-heptylammonium cation, N, N-dimethyl-N-butyl-N- Hexylammonium cations, N, N-diethyl-N-butyl-N-heptylammonium cations, N, N-dimethyl-N-pentyl-N-hexylammonium cations, N, N-dimethyl-N, N-dihexylammonium cations, Trimethylheptylammonium cation, N, N-diethyl-N-methyl-N-propylammonary cation, N, N-diethyl-N-methyl-N-pentylammonium cation, N, N-diethyl-N-methyl-N-heptyl Ammonium cations, N, N-diethyl-N-propyl-N-pentylammonium cations, triethylpropylammonium cations, triethylpentylammonium cations , Triethylheptylammonium cation, N, N-dipropyl-N-methyl-N-ethylammonary cation, N, N-dipropyl-N-methyl-N-pentylammonium cation, N, N-dipropyl-N-butyl-N- Hexylammonium cations, N, N-dipropyl-N, N-dihexylammonium cations, N, N-dibutyl-N-methyl-N-pentylammonium cations, N, N-dibutyl-N-methyl-N-hexylammonium cations, Examples thereof include trioctylmethylammonium cations, N-methyl-N-ethyl-N-propyl-N-pentylammonium cations, and more preferably trimethylpropylammonium cations.

As the fluoroorganic anion that can form an ionic liquid, any suitable fluoroorganic anion can be adopted as long as the effect of the present invention is not impaired. Such fluoroorganic anions may be completely fluorinated (perfluoro) or partially fluorinated.

Examples of such fluoroorganic anions include perfluoroalkyl sulfonates, bis (fluorosulfonyl) imides, and bis (perfluoroalkanesulfonyl) imides, and more specifically, for example, trifluoromethanesulfonates and pentafluoroethane sulfonates. , Heptafluoropropane sulfonate, nonafluorobutane sulfonate, bis (fluorosulfonyl) imide, bis (trifluoromethanesulfonyl) imide.

As a specific example of the ionic liquid, it can be appropriately selected from the combination of the above-mentioned cationic component and the above-mentioned anionic component and used. Specific examples of such an ionic liquid include 1-hexylpyridinium bis (fluorosulfonyl) imide, 1-ethyl-3-methylpyridinium trifluoromethanesulfonate, 1-ethyl-3-methylpyridinium pentafluoroethanesulfonate, and the like. 1-Ethyl-3-methylpyridinium heptafluoropropanesulfonate, 1-ethyl-3-methylpyridinium nonafluorobutane sulfonate, 1-butyl-3-methylpyridinium trifluoromethanesulfonate, 1-butyl-3-methylpyridinium bis (trifluoromethane) Sulfonyl) imide, 1-octyl-4-methylpyridinium bis (fluorosulfonyl) imide, 1-methyl-1-propylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-propylpyrrolidinium bis (fluoro) Sulfonyl) imide, 1-methyl-1-propylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-propylpiperidinium bis (fluorosulfonyl) imide, 1-ethyl-3-methylimidazolium trifluoromethane Ssulfonate, 1-ethyl-3-methylimidazolium heptafluoropropanesulfonate, 1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide, 1-ethyl-3-methylimidazolium bis (fluorosulfonyl) imide, 1 -Hexyl-3-methylimidazolium bis (fluorosulfonyl) imide, trimethylpropylammonium bis (trifluoromethanesulfonyl) imide, lithium bis (trifluoromethanesulfonyl) imide, lithium bis (fluorosulfonyl) imide.

The ionic liquid may be a commercially available one, but it can also be synthesized as follows. The method for synthesizing an ionic liquid is not particularly limited as long as the desired ionic liquid can be obtained, but in general, the document "Ionic Liquid-Forefront and Future of Development-" (CMC Publishing Co., Ltd.) The halide method, hydroxide method, acid ester method, complex formation method, neutralization method and the like as described in (Issued) are used.

The halide method, hydroxide method, acid ester method, complex formation method, and neutralization method are shown below by taking a nitrogen-containing onium salt as an example, but other sulfur-containing onium salts and phosphorus-containing onium salts are shown below. Other ionic liquids such as, can also be obtained by the same method.

The halide method is a method performed by a reaction as shown in the reaction formulas (1) to (3). First, a halide is obtained by reacting a tertiary amine with an alkyl halide (reaction formula (1), chlorine, bromine, or iodine is used as the halogen).

An acid (HA) or salt (MA, M is ammonium, lithium, sodium, potassium or the like having an anion structure (A ⁻ ) of an ionic liquid intended for the obtained halide and a cation forming a salt with the desired anion. ) To obtain the desired ionic liquid ( _R4 NA).

The hydroxide method is a method performed by a reaction as shown in the reaction formulas (4) to (8). First, the halide ( _R4 NX) is reacted with ion exchange membrane electrolysis (reaction formula (4)), OH type ion exchange resin method (reaction formula (5)) or silver oxide (Ag ₂ O) (reaction formula (reaction formula (4)). In 6)), a hydroxide ( _R4 NOH) is obtained (chlorine, bromine, and iodine are used as halogens).

By using the reactions of the reaction formulas (7) to (8) for the obtained hydroxide in the same manner as in the above halogenation method, the desired ionic liquid ( _R4 NA) can be obtained.

The acid ester method is a method performed by a reaction as shown in the reaction formulas (9) to (11). First, a _tertiary amine (R3N) is reacted with an acid ester to obtain an acid ester product (reaction formula (9). Esters, esters of organic acids such as methanesulfonic acid, methylphosphonic acid, and formic acid are used).

By using the reactions of the reaction formulas (10) to (11) for the obtained acid ester product in the same manner as in the above halogenation method, the desired ionic liquid ( _R4 NA) can be obtained. Further, by using methyltrifluoromethanesulfonate, methyltrifluoroacetate or the like as the acid ester, a directly ionic liquid can also be obtained.

The neutralization method is a method performed by a reaction as shown in the reaction formula (12). Reacts tertiary amines with organic acids such as CF ₃ COOH, CF ₃ SO ₃ H, (CF ₃ SO ₂ ) ₂ NH, (CF ₃ SO ₂ ) ₃ CH, (C ₂ F ₅ SO ₂ ) ₂ NH. Can be obtained by

R described in the above reaction formulas (1) to (12) represents hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and may contain a hetero atom.

As the ion conductive polymer, any suitable ion conductive polymer can be adopted as long as the effect of the present invention is not impaired. Examples of such an ionic conductive polymer include an ionic conductive polymer obtained by polymerizing or copolymerizing a monomer having a quaternary ammonium base); polythiophene, polyaniline, polypyrrole, polyethyleneimine, an allylamine-based polymer and the like. Conductive polymers; and the like. The ionic conduction polymer may be only one kind or two or more kinds.

As the ion conduction filler, any suitable ion conduction filler can be adopted as long as the effect of the present invention is not impaired. Examples of such ion conductive fillers include tin oxide, antimony oxide, indium oxide, cadmium oxide, titanium oxide, zinc oxide, indium, tin, antimony, gold, silver, copper, aluminum, nickel, chromium, titanium, and iron. , Cobalt, copper iodide, ITO (indium oxide / tin oxide), ATO (antimonate oxide / tin oxide) and the like. The ion conduction filler may be only one kind or two or more kinds.

As the electrically conductive polymer, any suitable electrically conductive polymer can be adopted as long as the effect of the present invention is not impaired. Examples of such an electrically conductive polymer include (3,4-ethylenedioxythiophene) -poly (styrene sulfonic acid).

<1-2-6. Other ingredients>
At least one selected from the group consisting of a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, and silicone-based pressure-sensitive adhesive composition) which is a material of the pressure-sensitive adhesive layer (1). The species) may contain any suitable other ingredients as long as the effects of the present invention are not impaired. Examples of such other components include other polymer components, cross-linking accelerators, cross-linking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, oil-soluble phenols, etc.), and antiaging agents. , Inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, UV absorbers, antioxidants, light stabilizers, chain transfer agents, plasticizers, softeners, surfactants , Antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.

≪1-3. Resin film (2) ≫
As the thickness of the resin film (2), any appropriate thickness may be adopted depending on the intended purpose as long as the effect of the present invention is not impaired. Such a thickness is preferably 20 μm to 125 μm, more preferably 25 μm to 100 μm, still more preferably 38 μm to 100 μm, and particularly preferably 40 μm to 40 μm in that the effects of the present invention can be more exhibited. It is 80 μm, most preferably 50 μm to 75 μm.

The resin film (2) includes a resin base film (2a).

The resin base film (2a) includes, for example, a plastic film composed of a polyester resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); polyethylene (PE), polypropylene ( A plastic film composed of an olefin resin containing α-olefins such as PP), polymethylpentene (PMP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer (EVA) as monomer components; polyvinyl chloride. Plastic film composed of (PVC); Plastic film composed of vinyl acetate resin; Plastic film composed of polycarbonate (PC); Plastic film composed of polyphenylene sulfide (PPS); Polyamide (nylon), all Plastic film composed of amide resin such as aromatic polyamide (aramid); Plastic film composed of polyimide resin; Plastic film composed of polyether ether ketone (PEEK); Polyethylene (PE), Polypropylene (PP) ) Etc.; plastic film composed of olefin resin; polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylfluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer, chlorofluoroethylene-vinylidene fluoride Examples thereof include a plastic film composed of a fluororesin such as a copolymer; and the like.

The resin base film (2a) may have only one layer or two or more layers. The resin base film (2a) may be a stretched one.

The resin base film (2a) may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-voltage impact exposure, ionizing radiation treatment, coating treatment with an undercoat agent, and the like.

The resin base film (2a) may contain any suitable additive as long as the effect of the present invention is not impaired. However, from the viewpoint that the effect of the present invention can be more exhibited, the content ratio of the additive in the resin base film (2a) is preferably 5% by weight or less, more preferably 3% by weight or less, and further. It is preferably 1% by weight or less, particularly preferably 0.5% by weight or less, and most preferably substantially 0% by weight. Here, "substantially 0% by weight" means that the content of a trace amount of impurities within a range that does not impair the effect of the present invention can be ignored.

When the resin base film (2a) contains at least one selected from the group consisting of colored pigments and colored dyes, the content ratio thereof is preferably 0.001 in that the effects of the present invention can be more exhibited. It is from% by weight to 5% by weight, more preferably 0.001% by weight to 3% by weight, still more preferably 0.001% by weight to 1% by weight.

The resin film (2) may have a conductive layer (2b). The conductive layer (2b) can be arranged between the pressure-sensitive adhesive layer (1) and the resin base film (2a).

The conductive layer (2b) may be only one layer or two or more layers.

The conductive layer (2b) can be provided by forming it on any suitable substrate. As such a base material, a resin base material film (2a) is preferable.

The conductive layer (2b) is formed by any suitable thin film forming method such as a vacuum deposition method, a sputtering method, an ion plating method, a spray pyrolysis method, a chemical plating method, an electroplating method, or a combination method thereof. A conductive film is formed on any suitable substrate (preferably a resin substrate film (2a)). Among these thin film forming methods, the vacuum vapor deposition method and the sputtering method are preferable from the viewpoints of the forming speed of the conductive film, the formability of the large area film, and the productivity.

Examples of the material for forming the conductive film include gold, silver, platinum, palladium, copper, aluminum, nickel, chromium, titanium, iron, cobalt, tin, and metal-based materials made of alloys thereof; indium oxide, A metal oxide-based material composed of tin oxide, titanium oxide, cadmium oxide, a mixture thereof and the like; another metal compound composed of copper iodide and the like; and the like are used.

As the thickness of the conductive layer (2b), any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired. Such a thickness is, for example, preferably 30 Å to 600 Å when formed from a metal-based material, and preferably 80 Å to 5000 Å when formed from a metal oxide-based material.

The surface resistance value of the conductive layer (2b) is preferably 1.0 × 10 ¹⁰ Ω / □ or less, more preferably 1.0 × 10 ⁹ Ω / □ or less, and further preferably 1.0 × 10 It is ⁸ Ω / □ or less, and particularly preferably 1.0 × 10 ⁷ Ω / □ or less.

When the conductive film is formed on any suitable substrate (preferably the resin substrate film (2a)), a corona discharge is applied to the surface of the substrate (preferably the resin substrate film (2a)). Adhesion between the conductive film and the base material (preferably the resin base material film (2a)) is subjected to any appropriate pretreatment such as treatment, ultraviolet irradiation treatment, plasma treatment, spatter etching treatment, and undercoat treatment. Can also be increased.

The resin film (2) may have an antistatic layer (2c). The antistatic layer (2c) may be disposed between the pressure-sensitive adhesive layer (1) and the resin base film (2a) and / or between the resin base film (2a) and the pressure-sensitive adhesive layer (2).

The antistatic layer (2c) may be only one layer or two or more layers.

As the thickness of the antistatic layer (2c), any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired. Such a thickness is preferably 1 nm to 1000 nm, more preferably 5 nm to 900 nm, still more preferably 7.5 nm to 800 nm, and particularly preferably 10 nm to 700 nm.

The surface resistance value of the antistatic layer (2c) is preferably 1.0 × 10 ¹⁰ Ω / □ or less, more preferably 8.0 × 10 ⁹ Ω / □ or less, and further preferably 5.0 ×. It is 10 ⁹ Ω / □ or less, and particularly preferably 1.0 × 10 ⁹ Ω / □ or less.

As the antistatic layer (2c), any appropriate antistatic layer can be adopted as long as it can exert an antistatic effect, as long as the effect of the present invention is not impaired. Such an antistatic layer is preferably an antistatic layer formed by coating an arbitrary suitable base material layer with a conductive coating liquid containing a conductive polymer. Specifically, for example, it is an antistatic layer formed by coating a conductive coating liquid containing a conductive polymer on a resin base film (2a). After coating, it is dried as necessary and cured (heat treatment, ultraviolet treatment, etc.) as necessary. Specific coating methods include a roll coating method, a bar coating method, and a gravure coating method.

As the conductive coating liquid containing the conductive polymer, any suitable conductive coating liquid can be adopted as long as the effect of the present invention is not impaired. Such a conductive coating liquid preferably contains a conductive polymer, a binder, a cross-linking agent, and a solvent. Since this solvent is substantially eliminated by volatilization, evaporation, etc. due to heating or the like in the process of forming the antistatic layer (2c), the antistatic layer (2c) preferably contains a conductive polymer, a binder, and a cross-linking agent. ..

Examples of the solvent include an organic solvent, water, or a mixed solvent thereof. Examples of the organic solvent include esters such as ethyl acetate; ketones such as methyl ethyl ketone, acetone and cyclohexanone; cyclic ethers such as tetrahydrofuran (THF) and dioxane; aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane. Hydrogens; aromatic hydrocarbons such as toluene and xylene; aliphatic or alicyclic alcohols such as methanol, ethanol, n-propanol, isopropanol and cyclohexanol; alkylene glycol monoalkyl ethers (eg, ethylene glycol monomethyl ether, Ethylene glycol monoethyl ether), glycol ethers such as dialkylene glycol monoalkyl ether; and the like. The solvent is preferably water or a mixed solvent containing water as a main component (for example, a mixed solvent of water and ethanol).

The content ratio of the conductive polymer in the antistatic layer (2c) is preferably 3% by weight to 80% by weight, and more preferably 5% by weight to 60% by weight.

As the conductive polymer, any suitable conductive polymer can be adopted as long as the effect of the present invention is not impaired. Examples of such a conductive polymer include a conductive polymer obtained by doping a π-conjugated conductive polymer with a polyanion. Examples of the π-conjugated conductive polymer include chain conductive polymers such as polythiophene, polypyrrole, polyaniline, and polyacetylene. Examples of the polyanion include polystyrene sulfonic acid, polyisoprene sulfonic acid, polyvinyl sulfonic acid, polyallyl sulfonic acid, ethyl acrylate sulfonic acid, polymethacrylic carboxylic acid and the like.

The conductive polymer may be only one kind or two or more kinds.

The content ratio of the binder in the antistatic layer (2c) is preferably 50% by weight to 95% by weight, more preferably 60% by weight to 90% by weight.

As the binder that can be contained in the conductive coating liquid, any suitable binder can be adopted as long as the effect of the present invention is not impaired. The binder may be only one type or two or more types. The binder is preferably a resin, and more preferably a polyester resin. The proportion of the polyester resin in the binder is preferably 90% by weight to 100% by weight, more preferably 98% by weight to 100% by weight.

The polyester resin contains polyester as a main component (preferably more than 50% by weight, more preferably 75% by weight or more, still more preferably 90% by weight or more, and particularly preferably a component occupying substantially 100% by weight). It is preferable to include as.

As the polyester, any suitable polyester can be adopted as long as the effect of the present invention is not impaired. Such polyesters are preferably polyvalent carboxylic acids (eg, dicarboxylic acid compounds) having two or more carboxyl groups in one molecule and derivatives thereof (eg, anhydrides, esterified products of the polyvalent carboxylic acid). One selected from one or more compounds (polyvalent carboxylic acid component) selected from (halide, etc.) and one selected from polyhydric alcohols (eg, diols) having two or more hydroxyl groups in one molecule. Alternatively, it is preferable to have a structure in which two or more kinds of compounds (polyhydric alcohol components) are condensed.

As the polyvalent carboxylic acid component, any appropriate polyvalent carboxylic acid can be adopted as long as the effect of the present invention is not impaired. Examples of such a polyvalent carboxylic acid component include oxalic acid, malonic acid, difluoromalonic acid, alkylmalonic acid, succinic acid, tetrafluorosuccinic acid, alkylsuccinic acid, (±) -apple acid, and meso-tartrate. Itaconic acid, maleic acid, methylmaleic acid, fumaric acid, methylfumaric acid, acetylenedicarboxylic acid, glutaric acid, hexafluoroglutaric acid, methylglutaric acid, glutaconic acid, adipic acid, dithioadic acid, methyladipic acid, dimethyladipic acid, Tetramethyladipic acid, methyleneadipic acid, muconic acid, galactalic acid, pimelliic acid, sveric acid, perfluorosveric acid, 3,3,6,6-tetramethylsveric acid, azelaic acid, sevacinic acid, perfluorosevacinic acid, Aliphatic dicarboxylic acids such as brassic acid, dodecyldicarboxylic acid, tridecyldicarboxylic acid, tetradecyldicarboxylic acid; cycloalkyldicarboxylic acid (eg, 1,4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid), 1,4 -Alicyclic dicarboxylic acids such as (2-norbornene) dicarboxylic acid, 5-norbornen-2,3-dicarboxylic acid (hymic acid), adamantandicarboxylic acid, spiroheptandicarboxylic acid; phthalic acid, isophthalic acid, dithioisophthalic acid, Methylisophthalic acid, dimethylisophthalic acid, chloroisophthalic acid, dichloroisophthalic acid, terephthalic acid, methylterephthalic acid, dimethylterephthalic acid, chloroterephthalic acid, bromoterephthalic acid, naphthalenedicarboxylic acid, oxofluorange carboxylic acid, anthracendicarboxylic acid, biphenyldicarboxylic Acid, biphenylenedicarboxylic acid, dimethylbiphenylenedicarboxylic acid, 4,4 "-p-terephenylenedicarboxylic acid, 4,4" -p-quarelphenyldicarboxylic acid, bibenzyldicarboxylic acid, azobenzenedicarboxylic acid, homophthalic acid, phenylene II Acetic acid, phenylenedipropionic acid, naphthalenedicarboxylic acid, naphthalenedipropionic acid, biphenyldiacetic acid, biphenyldipropionic acid, 3,3'-[4,4'-(methylenedi-p-biphenylene) dipropionic acid, 4,4 Aromatic dicarboxylic acids such as'-bibenzyl diacetic acid, 3,3'(4,4'-bibenzyl) dipropionic acid, oxydi-p-phenylene diacetic acid; acid anhydride of any of the above polyvalent carboxylic acids; An ester of any of the above polyvalent carboxylic acids (eg, a. Lucille ester. Monoesters, diesters, etc.); acid halides corresponding to any of the above polyvalent carboxylic acids (eg, dicarboxylic acid chloride); and the like.

The polyvalent carboxylic acid component preferably includes aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid and their acid anhydrides; adipic acid, sebacic acid, azelaic acid, succinic acid, fumaric acid and maleic acid. Examples of aliphatic dicarboxylic acids such as hymic acid and 1,4-cyclohexanedicarboxylic acid and their acid anhydrides; lower alkyl esters of these dicarboxylic acids (for example, esters with monoalcohol having 1 to 3 carbon atoms); Will be.

As the polyhydric alcohol component, any appropriate polyhydric alcohol can be adopted as long as the effect of the present invention is not impaired. Examples of such polyhydric alcohol components include ethylene glycol, propylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, and neopentyl glycol. 1,5-pentanediol, 1,6-hexanediol, 3-methylpentanediol, diethylene glycol, 1,4-cyclohexanedimethanol, 3-methyl-1,5-pentanediol, 2-methyl-1,3-propane Diores, 2,2-diethyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, xylylene glycol, hydrogenated bisphenol A, bisphenol A and other diols; these diols (For example, ethylene oxide adduct, propylene oxide adduct, etc.); and the like.

The molecular weight of the polyester resin is preferably ⁵ × 10 ³ to 1.5 × 105, and more preferably 1 as a standard polystyrene-equivalent weight average molecular weight (Mw) measured by gel permeation chromatography (GPC). It is × 10 ⁴ to 6 × 10 ⁴ .

The glass transition temperature (Tg) of the polyester resin is preferably 0 ° C to 120 ° C, more preferably 10 ° C to 80 ° C.

As the polyester resin, for example, a commercially available product name "Byronal" manufactured by Toyobo Co., Ltd. can be used.

The conductive coating liquid may be a binder other than the polyester resin (for example, acrylic resin, acrylic urethane resin, acrylic styrene resin, acrylic silicone resin, silicone resin, polysilazane resin, polyurethane resin, etc., as long as the effect of the present invention is not impaired. At least one resin selected from a fluororesin and a polyolefin resin) may be further contained.

As the cross-linking agent that can be contained in the conductive coating liquid, any suitable cross-linking agent can be adopted as long as the effect of the present invention is not impaired. The cross-linking agent may be only one kind or two or more kinds. The cross-linking agent preferably includes an isocyanate-based cross-linking agent, an epoxy-based cross-linking agent, a melamine-based cross-linking agent, a peroxide-based cross-linking agent, a urea-based cross-linking agent, a metal alkoxide-based cross-linking agent, and a metal chelate-based cross-linking agent. Examples thereof include agents, metal salt-based cross-linking agents, carbodiimide-based cross-linking agents, oxazoline-based cross-linking agents, aziridine-based cross-linking agents, and amine-based cross-linking agents. Of these, a melamine-based cross-linking agent is preferable.

The content ratio of the cross-linking agent in the antistatic layer (2c) is preferably 1% by weight to 30% by weight, more preferably 2% by weight to 20% by weight.

The antistatic layer (2c) may contain any suitable other component as long as the effect of the present invention is not impaired.

<< 1-4. Any other layer ≫
The laminate according to the embodiment of the present invention may have any suitable other layer other than the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2). Such other layers may be only one layer or two or more layers.

In the laminated body according to the embodiment of the present invention, typical examples of the other layer include an adhesive layer (2) and a resin film (3), as shown in FIG.

<1-4-1. Adhesive layer (2)>
As the pressure-sensitive adhesive layer (2), any suitable pressure-sensitive adhesive layer may be adopted as long as the effects of the present invention are not impaired. The pressure-sensitive adhesive layer (2) may be only one layer or may be two or more layers.

The thickness of the pressure-sensitive adhesive layer (2) is preferably 0.5 μm to 150 μm, more preferably 1 μm to 100 μm, still more preferably 2 μm to 80 μm, in that the effect of the present invention can be more exhibited. It is particularly preferably 3 μm to 50 μm, and most preferably 5 μm to 30 μm.

The pressure-sensitive adhesive layer (2) is preferably composed of at least one selected from the group consisting of an acrylic pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive.

The pressure-sensitive adhesive layer (2) can be formed by any suitable method. As such a method, for example, at least one selected from the group consisting of a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, silicone-based pressure-sensitive adhesive composition). ) Is applied on any suitable base material (for example, resin film (3)), heated and dried as necessary, and cured as necessary to form an adhesive layer on the base material. There is a way to do it. Examples of such an application method include a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, an air knife coater, a spray coater, a comma coater, a direct coater, and a roll brush coater. Method can be mentioned.

The pressure-sensitive adhesive layer (2) may contain a conductive component. For conductive components, <1-2-5. The explanation in the section of Conductive component> can be used as it is.

The pressure-sensitive adhesive layer (2) may contain any suitable additive as long as the effect of the present invention is not impaired. Such an additive may be only one kind or two or more kinds.

Examples of the additive include at least one selected from the group consisting of colored pigments and colored dyes. The coloring pigment preferably includes a black pigment. The coloring dye preferably includes a black dye. That is, the additive is preferably at least one selected from the group consisting of black pigments and black dyes.

When the pressure-sensitive adhesive layer (2) contains at least one selected from the group consisting of a coloring pigment and a coloring dye, the content ratio of at least one selected from the group consisting of a coloring pigment and a coloring dye is the content ratio of the pressure-sensitive adhesive layer (2). ) Is more likely to be exhibited with respect to the polymer component contained in the pressure-sensitive adhesive composition (typically, an acrylic pressure-sensitive adhesive composition), preferably 0.01% by weight or more. It is 5% by weight, more preferably 0.1% by weight to 3% by weight, still more preferably 0.5% by weight to 1% by weight. The "polymer component" referred to here is at least one selected from the group consisting of an acrylic polymer in the case of an acrylic pressure-sensitive adhesive composition, a urethane prepolymer and a polyol in the case of a urethane-based pressure-sensitive adhesive composition, and rubber. In the case of a based pressure-sensitive adhesive composition, it is a rubber-based polymer, and in the case of a silicone-based pressure-sensitive adhesive composition, it is a silicone-based polymer.

For acrylic adhesives, urethane adhesives, rubber adhesives, and silicone adhesives, <1-2-1. Acrylic adhesive>, <1-2-2. Urethane adhesive>, <1-2-3. Rubber adhesive>, <1-2-4. The explanation in the section of Silicone adhesive> can be used as it is.

At least one selected from the group consisting of a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, and silicone-based pressure-sensitive adhesive composition) which is a material of the pressure-sensitive adhesive layer (2). The species) may contain any suitable other ingredients as long as the effects of the present invention are not impaired. Other such components include <1-2-6. The explanation in the section of Other Ingredients> can be used as it is.

<1-4-2. Resin film (3)>
The thickness of the resin film (3) is preferably 4 μm to 450 μm, more preferably 8 μm to 350 μm, still more preferably 12 μm to 250 μm, and particularly preferably 12 μm to 250 μm in that the effects of the present invention can be more exhibited. It is 16 μm to 150 μm, and most preferably 20 μm to 100 μm.

Regarding the resin film (3), << 1-3. The explanation in the section of resin film (2) ≫ can be used as it is.

≪≪2. Manufacturing method of laminated body ≫≫
The laminate according to the embodiment of the present invention can be produced by any suitable method as long as the effect of the present invention is not impaired.

As a typical example of the method for producing a laminate according to the embodiment of the present invention, the laminate of the present invention has a resin film (1), an adhesive layer (1), and a resin film (2) in this order. A case where the laminated body is composed of these components will be described.

When the laminate according to the embodiment of the present invention has the resin film (1), the pressure-sensitive adhesive layer (1), and the resin film (2) in this order and is a laminate composed of these components, a method for producing the same. For example, a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, silicone-based pressure-sensitive adhesive composition) for forming the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (1). At least one selected from the group consisting of materials) is applied onto the resin film (2), heated and dried as necessary, cured as necessary, and adhered onto the resin film (2). When the agent layer (1) is formed, and then the resin film (1) (release layer (1b)) is provided on the surface of the pressure-sensitive adhesive layer (1) opposite to the resin film (2). Can be manufactured by pasting (on that side).

As another representative example of the method for producing a laminate according to the embodiment of the present invention, the laminate of the present invention includes a resin film (1), a pressure-sensitive adhesive layer (1), a resin film (2), and a pressure-sensitive adhesive layer ( 2), a case where the resin film (3) is provided in this order and the laminate is composed of these components will be described.

The laminate according to the embodiment of the present invention has a resin film (1), a pressure-sensitive adhesive layer (1), a resin film (2), a pressure-sensitive adhesive layer (2), and a resin film (3) in this order. In the case of a laminated body composed of constituent elements, as a manufacturing method thereof, for example, a resin film (1), an adhesive layer (1), and a resin film (2) are provided in this order, and the laminated body composed of these constituent elements is provided in this order. A body (A), a pressure-sensitive adhesive layer (2), and a resin film (3) are provided in this order, and a laminated body (B) composed of these components is manufactured, respectively, and then the laminated body (A) is manufactured. The surface of the resin film (2) and the surface of the pressure-sensitive adhesive layer (2) of the laminated body (B) are attached.

The laminate (A) is, for example, a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition, urethane-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive composition, silicone) that forms a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (1). At least one selected from the group consisting of the adhesive composition) is applied onto the resin film (2), heated and dried as necessary, and cured as necessary, and the resin film (2) is cured. The pressure-sensitive adhesive layer (1) is formed on the pressure-sensitive adhesive layer (1), and then the resin film (1) (release layer (1b)) is provided on the surface of the pressure-sensitive adhesive layer (1) opposite to the resin film (2). If it is, it can be manufactured by pasting the side).

The laminate (B) is required by, for example, applying a pressure-sensitive adhesive composition (preferably an acrylic pressure-sensitive adhesive composition) for forming a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) onto a resin film (3). The pressure-sensitive adhesive layer (2) is formed on the resin film (3) by heating and drying as required and curing as necessary.

Until the laminate (A) and the laminate (B) are attached, in order to protect the exposed surface of the pressure-sensitive adhesive layer (2), any suitable separator (for example, the same as the resin film (1)) is used. A film) may be attached.

≪≪3. Manufacturing method of image display member ≫≫
As a method for manufacturing an image display member according to an embodiment of the present invention, the laminated body of the present invention is used.

The laminate of the present invention used in the method for manufacturing an image display member according to the embodiment of the present invention is formed by directly laminating the resin film (1) and the pressure-sensitive adhesive layer (1).

The method for manufacturing an image display member according to the embodiment of the present invention includes a step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1) and a step of attaching an OLED panel to the exposed pressure-sensitive adhesive layer (1). include. As the peeling method and the bonding method, any appropriate method can be adopted as long as the effect of the present invention is not impaired.

According to the method for manufacturing an image display member according to the embodiment of the present invention, the OLED panel and the pressure-sensitive adhesive layer (1) side of the laminate A from which the resin film (1) is peeled off from the laminate of the present invention are laminated. Image display members can be manufactured.

Since the laminated body of the present invention is used in the image display member according to the embodiment of the present invention, excellent inspectability from the back surface side in the manufacturing process can be exhibited.

≪≪4. Manufacturing method of mobile electronic devices ≫≫
The method for manufacturing a mobile electronic device according to an embodiment of the present invention uses the laminate of the present invention.

The laminate of the present invention used in the method for manufacturing a mobile electronic device according to the embodiment of the present invention is formed by directly laminating the resin film (1) and the pressure-sensitive adhesive layer (1).

The method for manufacturing a mobile electronic device according to the embodiment of the present invention includes a step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1), a step of bonding an OLED panel to the exposed pressure-sensitive adhesive layer (1), and laminating. A step of providing the pressure-sensitive adhesive layer (2) on the outermost layer of the body on the resin film (2) side when viewed from the pressure-sensitive adhesive layer (1), and the resin film (2) of the pressure-sensitive adhesive layer (2). It includes a step of laminating the housing on the side opposite to the existing side. As the order of each step, any appropriate order may be adopted as long as the effect of the present invention is not impaired. As a peeling method, a bonding method, or a method for providing an adhesive layer, any appropriate method can be adopted as long as the effect of the present invention is not impaired.

As the pressure-sensitive adhesive layer (2), any suitable pressure-sensitive adhesive layer can be adopted as long as the effects of the present invention are not impaired.

According to the method for manufacturing a mobile electronic device according to the embodiment of the present invention, the OLED panel and the pressure-sensitive adhesive layer (1) side of the laminate A from which the resin film (1) is peeled off from the laminate of the present invention are laminated and laminated. A mobile electronic device can be manufactured in which the outermost layer on the resin film (2) side as viewed from the pressure-sensitive adhesive layer (1) of the body A is bonded to the housing via the pressure-sensitive adhesive layer (2).

Since the laminated body of the present invention is used in the mobile electronic device according to the embodiment of the present invention, excellent inspectability from the back surface side in the manufacturing process and excellent antireflection from the visual recognition side in the obtained mobile electronic device. Sex can be expressed at the same time.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples. The tests and evaluation methods in the examples and the like are as follows. In addition, when it is described as "part", it means "part by weight" unless there is a special note, and when it is described as "%", it means "% by weight" unless there is a special note.

<Measurement of weight average molecular weight>
The weight average molecular weight was measured by a gel permeation chromatograph (GPC) method. Specifically, it was measured under the following conditions using the trade name "HLC-8120GPC" (manufactured by Tosoh Corporation) as a GPC measuring device, and calculated by a standard polystyrene conversion value.
(Molecular weight measurement conditions)
-Sample concentration: 0.2% by weight (tetrahydrofuran solution)
-Sample injection volume: 10 μL
-Column: Product name "TSKguardcolum SuperHZ-H (1) + TSKgel SuperHZM-H (2)" (manufactured by Tosoh Corporation)
-Reference column: Product name "TSKgel SuperH-RC (1)" (manufactured by Tosoh Corporation)
-Eluent: Tetrahydrofuran (THF)
・ Flow rate: 0.6mL / min
-Detector: Differential refractometer (RI)
-Column temperature (measurement temperature): 40 ° C

<Measurement of total light transmittance>
Using HM-150N of Murakami Color Technology Laboratory, the total light transmittance was measured under the condition of JIS-K-7361. At this time, the laminate was installed so that the resin film (2) (or the resin film (3) when the resin film (3) is provided) faces the light source side.

<Confirmation of antireflection>
Peel off the peeling resin film on one side of the double-sided tape (CS9660TB, total light transmittance> 87%, manufactured by Nitto Denko), which has a three-layer structure consisting of a peeling resin film-an optical acrylic pressure-sensitive adhesive-a peeling resin film. The resin film (2) of (I) was attached to the surface side of the resin film (3) when the pressure-sensitive adhesive layer (2) and the resin film (3) were provided. After that, the remaining release resin film is peeled off, the aluminum foil (manufactured by Mitsubishi Aluminum) is cut to about half the size of the flat side of the laminate (I), and the optical acrylic adhesive on the laminate (I) to be measured is adhered. It was pasted with the agent. Next, the resin film (1) was peeled off from the laminated body (I). A polyimide resin film (“UPILEX-50S”, thickness 50 μm, manufactured by Ube Industries, Ltd.) is attached to the surface side of the exposed adhesive layer (1), and then a polarizing film (“REGQ1698GDUHC3 + H2-BW”) is attached on the polyimide resin film. , 78 μm thick, manufactured by Nitto Denko). The polarizing film was placed on a test table so that the surface side was facing upward, and as shown in FIG. 3, antireflection was confirmed in the vertical direction from a distance of 30 cm from the polarizing plate. Judgment was made based on whether the part where the aluminum foil was bonded and the part where the aluminum foil was not bonded could be clearly distinguished.
〇: Cannot be clearly distinguished.
×: Can be clearly distinguished.

<Checkability>
The resin film (1) was peeled off from the laminated body (I) to be measured. A polyimide resin film (“UPILEX-50S”, thickness 50 μm, manufactured by Ube Industries) and a polarizing film (“REGQ1698GDUHC3 + H2-BW”, thickness 78 μm, manufactured by Nitto Denko) on which the surface side of the exposed adhesive layer (1) is magically printed. ) Was attached to the magically printed surface side of the laminate (II). It was set on a sample table of a digital microscope (VHX200, manufactured by KEYENCE CORPORATION) so that the surface side of the polarizing plate was in the downward direction. The magnification of the microscope lens was set to 10 times, the focus was adjusted, and the magic printing of the polyimide resin film was confirmed as shown in FIG. Judgment was made based on whether or not magic printing was seen.
〇: Printing can be seen.
X: No printing can be seen.

[Production Example 1]: Production of the pressure-sensitive adhesive composition A1 2-ethylhexyl acrylate (2EHA): 63 parts by weight, N- as a monomer in a reaction vessel provided with a thermometer, a stirrer, a reflux cooling tube and a nitrogen gas introduction tube. Vinylpyrrolidone (NVP): 15 parts by weight, methyl methacrylate (MMA): 9 parts by weight, and hydroxyethyl acrylate (HEA): 13 parts by weight, azobisisobutyronitrile as a polymerization initiator: 0.2 parts by weight, and Ethyl acetate: 233 parts by weight was added as a solvent, nitrogen gas was flowed, and nitrogen substitution was performed for about 1 hour while stirring. Then, the mixture was heated to 60 ° C. and reacted for 7 hours to obtain an acrylic polymer solution having a weight average molecular weight (Mw) of 1.2 million. To the obtained acrylic polymer solution, 1 part by weight of Takenate D110N (Mitsui Chemicals) was added to 100 parts by weight of the acrylic polymer, mixed uniformly, and further reacted to obtain the solution of the acrylic polymer A. Obtained.
A black pigment (manufactured by Alfa Aesar, carbon black): 1 part by weight is added to 100 parts by weight of the acrylic polymer A to the obtained solution of the acrylic polymer A to produce a black pressure-sensitive adhesive composition A1. did.

[Production Example 2]: Production of Adhesive Composition A2 In the solution of the acrylic polymer A obtained in Production Example 1, a black pigment (manufactured by Alfa Aesar, manufactured by Alfa Aesar) was added to 100 parts by weight of the acrylic polymer A. Carbon black): 1.5 parts by weight was added to produce a black pressure-sensitive adhesive composition A2.

[Production Example 3]: Production of Adhesive Composition A3 The solution itself of the acrylic polymer A obtained in Production Example 1 was used as the pressure-sensitive adhesive composition A3.

[Production Example 4]: Production of Adhesive Composition A4 In the solution of the acrylic polymer A obtained in Production Example 1, a black pigment (manufactured by Alfa Aesar, manufactured by Alfa Aesar, 100 parts by weight) based on the acrylic polymer A. Carbon black): 3 parts by weight was added to produce a black pressure-sensitive adhesive composition A4.

[Example 1]
Peel off the one-sided peeling resin film of a double-sided tape (total light transmittance 80%, manufactured by Togawa Paper Co., Ltd.) having a three-layer structure consisting of a peeling resin film-acrylic adhesive-peeling resin film, and a base material made of polyester resin ("T910J75"). , 75 μm thick, manufactured by Mitsubishi Chemical) and bonded to the non-static treated surface. Next, the remaining peeling resin film was peeled off, and a silicone-treated surface of a base material (“MRQ50T100J”, thickness 50 μm, manufactured by Mitsubishi Chemical Corporation) made of a polyester resin treated with silicone was bonded.
As a result, the resin film (1-1) (with silicone-treated surface) (thickness 50 μm) / adhesive layer (1-1) (thickness 25 μm) / resin film (2-1) (thickness 25 μm) having a total light transmittance of 80% (1) (thickness 50 μm) (thickness 50 μm) A laminated body 1 having a thickness of 75 μm) was obtained.
The results are shown in Table 1.

[Example 2]
Instead of the three-layer double-sided tape (total light transmittance 80%, manufactured by Togawa Paper Co., Ltd.) of the release resin film-acrylic adhesive-release resin film, the release resin film-acrylic adhesive-release resin film 3 A resin film (1-2) (silicone treatment) having a total light transmission rate of 75% was carried out in the same manner as in Example 1 except that a double-sided tape having a layer structure (total light transmission rate 75%, manufactured by Tomagawa Paper Manufacturing Co., Ltd.) was used. A laminate 2 having a structure of (imposition) (thickness 50 μm) / pressure-sensitive adhesive layer (1-2) (thickness 25 μm) / resin film (2-2) (thickness 75 μm) was obtained.
The results are shown in Table 1.

[Example 3]
Instead of the double-sided tape (total light transmittance 80%, manufactured by Togawa Paper Co., Ltd.) having a three-layer structure of peeling resin film-acrylic adhesive-peeling resin film, peeling resin film-acrylic adhesive-peeling resin film 3 A resin film (1-3) (silicone treatment) having a total light transmittance of 69% was carried out in the same manner as in Example 1 except that a layered double-sided tape (total light transmission rate 69%, manufactured by Tomagawa Paper Manufacturing Co., Ltd.) was used. A laminate 3 having a structure of (imposition) (thickness 50 μm) / pressure-sensitive adhesive layer (1-3) (thickness 25 μm) / resin film (2-3) (thickness 75 μm) was obtained.
The results are shown in Table 1.

[Example 4]
Instead of the three-layer double-sided tape (total light transmittance 80%, manufactured by Togawa Paper Co., Ltd.) of the release resin film-acrylic adhesive-release resin film, the release resin film-acrylic adhesive-release resin film 3 A resin film (1-4) (silicone treatment) having a total light transmittance of 59% was carried out in the same manner as in Example 1 except that a layered double-sided tape (total light transmission rate 59%, manufactured by Tomagawa Paper Manufacturing Co., Ltd.) was used. A laminated body 4 having a structure of (imposition) (thickness 50 μm) / pressure-sensitive adhesive layer (1-4) (thickness 25 μm) / resin film (2-4) (thickness 75 μm) was obtained.
The results are shown in Table 1.

[Example 5]
Instead of the three-layer double-sided tape (total light transmittance 80%, manufactured by Togawa Paper Co., Ltd.) of the release resin film-acrylic adhesive-release resin film, the release resin film-acrylic adhesive-release resin film 3 A resin film (1-5) (silicone treatment) having a total light transmittance of 49% was carried out in the same manner as in Example 1 except that a layered double-sided tape (total light transmission rate 49%, manufactured by Tomagawa Paper Manufacturing Co., Ltd.) was used. A laminated body 5 having a structure of (imposition) (thickness 50 μm) / pressure-sensitive adhesive layer (1-5) (thickness 25 μm) / resin film (2-5) (thickness 75 μm) was obtained.
The results are shown in Table 1.

[Example 6]
The pressure-sensitive adhesive composition A1 obtained in Production Example 1 is applied to a base material made of a polyester resin (“Lumilar S10”, thickness 75 μm, manufactured by Toray Industries, Inc.) with a fountain roll so that the thickness after drying is 25 μm, and the drying temperature is reached. It was cured and dried under the conditions of 130 ° C. and a drying time of 2 minutes. In this way, the pressure-sensitive adhesive layer was produced on the substrate. Next, a silicone-treated surface of a base material made of a polyester resin (“Lumirer S10”, thickness 25 μm, manufactured by Toray) whose one surface is treated with silicone is attached to the surface of the pressure-sensitive adhesive layer, and the total light transmittance is 30. %, Resin film (1-6) (with silicone-treated surface) (thickness 25 μm) / adhesive layer (1-6) (thickness 25 μm) / resin film (2-6) (thickness 75 μm) I got 6.
The results are shown in Table 1.

[Example 7]
The same procedure as in Example 6 was carried out except that the pressure-sensitive adhesive composition A2 obtained in Production Example 2 was used instead of the pressure-sensitive adhesive composition A1 obtained in Production Example 1, and the total light transmittance was 21%. A laminate 7 having a resin film (1-7) (with a silicone-treated surface) (thickness 25 μm) / adhesive layer (1-7) (thickness 25 μm) / resin film (2-7) (thickness 75 μm) is obtained. rice field.
The results are shown in Table 1.

[Comparative Example 1]
The same procedure as in Example 6 was carried out except that the pressure-sensitive adhesive composition A3 obtained in Production Example 3 was used instead of the pressure-sensitive adhesive composition A1 obtained in Production Example 1, and the total light transmittance was 87%. Obtained a laminate C1 having a resin film (1-C1) (with a silicone-treated surface) (thickness 25 μm) / adhesive layer (1-C1) (thickness 25 μm) / resin film (2-C1) (thickness 75 μm). rice field.
The results are shown in Table 1.

[Comparative Example 2]
The same procedure as in Example 6 was carried out except that the pressure-sensitive adhesive composition A4 obtained in Production Example 4 was used instead of the pressure-sensitive adhesive composition A1 obtained in Production Example 1, and the total light transmittance was 5%. A laminate C2 having a resin film (1-C2) (with a silicone-treated surface) (thickness 25 μm) / adhesive layer (1-C2) (thickness 25 μm) / resin film (2-C2) (thickness 75 μm) is obtained. rice field.
The results are shown in Table 1.

The laminate of the present invention can be suitably used in a manufacturing process of an optical member or an electronic member.

Resin film (1) 10
Adhesive layer (1) 20
Resin film (2) 30
Adhesive layer (2) 40
Resin film (3) 50
Acrylic adhesive layer for optics 60
Polyimide resin film 70
Printing unit 75
Polarizing film 80
Aluminum foil 90
Laminated body 100

Claims

A laminated body having three or more layers having a resin film (1), an adhesive layer (1), and a resin film (2) in this order.
The total light transmittance of the laminated body is 20% to 83%.
Laminated body.
A method for manufacturing an image display member using the laminate according to claim 1.
The resin film (1) and the pressure-sensitive adhesive layer (1) are directly laminated, and the resin film (1) is directly laminated.
A step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1),
The process of attaching the OLED panel to the exposed adhesive layer (1) and
including,
Manufacturing method of image display member.
A method for manufacturing a mobile electronic device using the laminate according to claim 1.
The resin film (1) and the pressure-sensitive adhesive layer (1) are directly laminated, and the resin film (1) is directly laminated.
A step of peeling the resin film (1) from the pressure-sensitive adhesive layer (1),
The process of attaching the OLED panel to the exposed adhesive layer (1) and
A step of providing the pressure-sensitive adhesive layer (2) on the outermost layer of the laminate on the resin film (2) side when viewed from the pressure-sensitive adhesive layer (1).
A step of bonding the housing to the side of the pressure-sensitive adhesive layer (2) opposite to the side where the resin film (2) exists.
including,
How to make mobile electronic devices.