TW201708369A - Resin composition, film, touch sensor panel and display device - Google Patents

Abstract

Provided is a resin composition containing 45-60 mass parts of (metha)acryl resin, and 40-55 mass parts of fluorovinylidene resin, with respect to 100 mass parts of the total amount of the (metha)acryl resin and the fluorovinylidene resin. The fluorovinylidene resin is a fluorovinylidene-hexafluoropropylene copolymer containing 65-90 mass% of a structure unit derived from fluorovinylidene, and 10-35 mass% of a structure unit derived from hexafluoropropylene.

Description

Resin composition, film, touch sensor panel and display device

The present invention relates to a resin composition, a film, and a touch sensor panel.

In recent years, touch sensor panels have been used in smart phones, portable game consoles, music players, tablet terminal devices, and the like. A film having conductivity and transparency is used as a protective sheet on the surface of such a touch sensor panel. For such a film, for example, a film containing methacrylic resin and polyvinylidene fluoride is known ( Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2013-244604

However, when the film equivalent to the one described in Patent Document 1 was exposed to an environment of 60 ° C and a relative humidity of 90% for 120 hours, it was known that white turbidity was generated. This result suggests that the durability of such a film is not sufficient.

The present inventors have intensively studied a film for a touch sensor panel which has a high relative permittivity and can maintain transparency for a long period of time, and as a result, has been found to be used for the resin composition constituting the film. The content of the structural unit derived from vinylidene fluoride and the structural unit derived from hexafluoropropylene in the vinylidene fluoride resin greatly affects the durability thereof, and the present invention has been completed.

That is, the present invention includes the inventions described in the following [1] to [21]. [1] A resin composition containing a (meth)acrylic resin and a vinylidene fluoride resin, wherein the total amount of the (meth)acrylic resin and the vinylidene fluoride resin is (methylene) per 100 parts by mass 45 to 60 parts by mass of the acrylic resin and 40 to 55 parts by mass of the vinylidene fluoride resin, and the vinylidene fluoride resin is composed of the structural unit 65 derived from vinylidene fluoride in an amount of 100% by mass of the total constituent unit thereof. 90% by mass and a structural unit derived from hexafluoropropylene: 10 to 35% by mass of a vinylidene fluoride-hexafluoropropylene copolymer; [2] The resin composition according to [1], wherein (meth)acrylic resin The resin of the following (a1) or (a2): (a1) a homopolymer of methyl methacrylate; (a2) containing from 50 to 99.9% by mass of the structural unit derived from methyl methacrylate, and at least one from a copolymer of 0.1 to 50% by mass of the structural unit of the (meth) acrylate represented by the formula (1), (wherein R ₁ represents a hydrogen atom or a methyl group, when R ₁ is a hydrogen atom, R ₂ represents an alkyl group having 1 to 8 carbon atoms, and when R ₁ is a methyl group, R ₂ represents an alkyl group having 2 to 8 carbon atoms; [3] The resin composition according to [1] or [2] wherein the (meth)acrylic resin has a weight average molecular weight (Mw) of 70,000 to 300,000; [4] as [1] to [3] The resin composition according to any one of [1] to [4], wherein the resin composition is a resin composition according to any one of [1] to [4]. The composition, wherein the vinylidene fluoride resin has a melt mass flow rate (MFR) of from 0.1 to 30 g/10 minutes; [6] a film of the resin according to any one of [1] to [5] (7) A film comprising a (meth)acrylic resin and a vinylidene fluoride resin, wherein the vinylidene fluoride resin is 100% by mass of the total constituent unit, and 65 to 90% by mass of structural unit derived from vinylidene fluoride, and 10 to 35 mass% of a vinylidene fluoride-hexafluoropropylene copolymer derived from a structural unit of hexafluoropropylene The film has a relative permittivity of 4.0 or more, and has a haze of 2% or less after exposure to an environment of 60° C. and a relative humidity of 90% for 120 hours. [8] The film according to [6] or [7], The film according to any one of [6] to [8], wherein the coating layer is disposed on the film, and the coating layer is provided in the film. (10) A second layered body comprising the film according to any one of [6] to [8], and a thermoplastic resin layer; [11] as in [ (10) The second layered body according to the above aspect, wherein the thermoplastic resin layer is composed of a plurality of thermoplastic resin layers and disposed on both surfaces of the film; [12] the second layer as described in [10] or [11] In the laminated body, the thermoplastic resin layer contains 50 parts by mass or more of the (meth)acrylic resin per 100 parts by mass of the thermoplastic resin constituting the thermoplastic resin layer; [13] as described in [12] The second laminate, wherein the (meth)acrylic resin has a weight average molecular weight (Mw) of 50,000 The second laminate according to any one of [10] to [13] wherein the thermoplastic resin layer has a thickness of 10 to 200 μm; [15] as in [10] to [14]. The second laminate according to any one of the preceding claims, wherein the thermoplastic resin layer has a Vicat softening temperature of 100 to 150 ° C; and [16] a third laminate having [10] to [15] The second layered body and the coating layer according to any one of the preceding claims, wherein the coating layer is disposed on at least one surface of the film to provide at least one functional layer; [17] a touch sensor panel The film according to any one of [6] to [8]; [18] a touch sensor panel comprising the first laminate described in [9], [10] to [15] The second laminate according to any one of the aspects of the present invention, wherein the second laminate or the third laminate according to [17], wherein the film according to any one of [6] to [8]; A display device comprising the first layered product according to [9], the second layered body according to any one of [10] to [15], or the [17] The third carrier laminate.

The film formed by the resin composition of the present invention can be used as a window sheet of a touch sensor panel because of its high relative permittivity and transparency for long-term use.

1‧‧‧Single-axis extruder (melting of extruded (meth)acrylic resin)

2‧‧‧Single-axis extruder (extruding the melt of the resin composition of the present invention)

3‧‧‧Single-axis extruder (melting of extruded (meth)acrylic resin)

4‧‧‧Feeding mode

5‧‧‧Multi-manifold mold

6‧‧‧ Film-like molten resin

7‧‧‧1st chill roll

8‧‧‧2nd cooling roller

9‧‧‧3rd cooling roller

10‧‧‧Layer

11‧‧‧Windows Sheet

12, 22‧‧‧Optical adhesive layer

13, 25‧‧‧ liquid crystal display device

14‧‧‧Transparent conductive foil

20‧‧‧membrane or laminate

21‧‧‧Polar plate

23‧‧‧Liquid Crystal Unit

Fig. 1 is a schematic view showing a manufacturing apparatus of a film of the present invention used in the examples.

Fig. 2 is a schematic cross-sectional view showing an example of an electrostatic capacitance type touch sensor panel to which the film or laminate of the present invention is applied.

Fig. 3 is a schematic view showing a cross section of an example of a liquid crystal display device to which a film or a laminate of the present invention is applied.

The invention is described in detail below.

<(Meth)acrylic resin>

The (meth)acrylic resin used in the present invention may, for example, be a homopolymer of a (meth)acrylic monomer such as (meth)acrylate or (meth)acrylonitrile or a copolymer of two or more kinds; A copolymer of a (meth)acrylic monomer and another monomer. In addition, in this specification, the phrase "(meth)acrylic" means "acrylic acid" or "methacrylic acid".

From the viewpoint of having excellent hardness, weather resistance, transparency, and the like, a methacrylic resin is preferably used as the (meth)acrylic resin. The methacrylic resin is a polymer obtained by polymerizing a monomer mainly composed of methacrylate (alkyl methacrylate), and examples thereof include a homopolymer of methacrylate (polyalkyl methacrylate). a copolymer of a methacrylate, a copolymer of 50% by mass or more of methacrylate and 50% by mass or less of a monomer other than methacrylate. When it is a copolymer of a methacrylate and a monomer other than a methacrylate, it is preferable that the methacrylate is 70 mass % or more, and a monomer other than a methacrylate is 100 mass % of the total monomers. The content is preferably 30% by mass or less, more preferably 90% by mass or more of the methacrylate, and 10% by mass or less of the monomer other than the methacrylate.

Examples of the monomer other than the methacrylate include an acrylate and a monofunctional monomer having one polymerizable carbon-carbon double bond in the molecule.

Examples of the monofunctional monomer include styrene monomers such as styrene, α-methylstyrene, and vinyltoluene; cyanide groups such as acrylonitrile and methacrylonitrile; acrylic acid; methacrylic acid; Diacid anhydride; N-substituted maleimide, such as phenyl maleimide, cyclohexyl maleimide, methyl maleimide, and the like; From the viewpoint of heat resistance In the molecular chain of the (meth)acrylic resin (also referred to as the main skeleton in the (meth)acrylic resin or in the main chain), the lactone ring structure, the glutaric anhydride structure, or the pentane can also be introduced.醯imino structure and so on.

More specifically, the (meth)acrylic resin is preferably the following resin of (a1) or (a2). Further, in the following (a2), it is preferred to set the total amount of the structural unit derived from methyl methacrylate and at least one structural unit derived from the (meth) acrylate represented by the formula (1) to 100% by mass.

(a1) a homopolymer of methyl methacrylate

(a2) a copolymer containing from 50 to 99.9% by mass of the structural unit derived from methyl methacrylate and at least one structural unit derived from the (meth) acrylate represented by the formula (1) in an amount of from 0.1 to 50% by mass (wherein R ₁ represents a hydrogen atom or a methyl group, when R ₁ is a hydrogen atom, R ₂ represents an alkyl group having 1 to 8 carbon atoms, and when R ₁ is a methyl group, R ₂ represents an alkyl group having 2 to 8 carbon atoms; ).

Here, the alkyl group having 1 to 8 carbon atoms represented by R ₂ when R ₁ is a hydrogen atom may, for example, be a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a second butyl group or a third butyl group. And a pentyl group, a hexyl group, a heptyl group, an octyl group, etc., and a C 2 to 8 alkyl group represented by R ₂ when R ₁ is a methyl group, and examples thereof include an ethyl group, a propyl group, an isopropyl group, and a butyl group. Dibutyl, tert-butyl, pentyl, hexyl, heptyl, octyl and the like.

a (meth) acrylate represented by the formula (1), preferably acrylic acid Methyl ester or ethyl acrylate, more preferably methyl acrylate.

The (meth)acrylic resin is a melt mass flow rate at 230 ° C (hereinafter sometimes referred to as MFR) measured in accordance with JIS K7210 with a load of 3.8 kg, and is usually 0.1 to 20 g/10 min, preferably 0.2 to 5 g/10 minutes, more preferably 0.5 to 3 g/10 minutes.

When the MFR of the (meth)acrylic resin is too large, the strength of the obtained film tends to decrease, and when the MFR of the (meth)acrylic resin is too small, the film formability tends to decrease.

The (meth)acrylic resin is a weight average molecular weight (hereinafter sometimes referred to as Mw) determined by GPC measurement, preferably 70,000 to 300,000, more preferably 100,000 to 250,000, still more preferably 120,000 to 250,000. Further preferably, it is from 150,000 to 200,000. When the Mw of the (meth)acrylic resin is larger, the obtained film tends to have higher transparency after being exposed to an environment of 60 ° C and a relative humidity of 90%, but when the Mw is too large, film formability is lowered. The tendency.

From the viewpoint of heat resistance, the (meth)acrylic resin is preferably 90 ° C or higher, more preferably 100 ° C or higher, as measured by JIS K7206 (hereinafter sometimes referred to as VST). More preferably, it is 102 ° C or more.

The VST of the (meth)acrylic resin can be appropriately set by adjusting the kind of the monomer, the ratio thereof, or the molecular weight of the (meth)acrylic resin.

The (meth)acrylic resin can be prepared by polymerizing the above monomer components by a method such as suspension polymerization or bulk polymerization. At this time, by adding an appropriate chain transfer agent, the MFR, Mw of the (meth)acrylic resin can be The VST or the like is adjusted to a preferred range. The amount of the chain transfer agent to be added may be appropriately determined depending on the type of the monomer, the ratio thereof, the desired characteristics, and the like. The (meth)acrylic resin is preferably one in which the content of the alkali metal is small. The content of the alkali metal can be adjusted by reducing the amount of the alkali metal-containing compound used during the polymerization or by adding a washing step after the polymerization to remove the alkali metal-containing compound.

A commercially available product can also be used for the (meth)acrylic resin. An example of a preferred commercial product is "SUMIPEX (registered trademark) MM" manufactured by Sumitomo Chemical Co., Ltd., and the like.

<vinylidene fluoride resin>

From the viewpoint of the transparency of the obtained film, the vinylidene fluoride resin used in the present invention contains the structural unit 65 derived from vinylidene fluoride based on 100% by mass of the total structural unit of the vinylidene fluoride resin. Up to 90% by mass, and 10 to 35 mass% of a vinylidene fluoride-hexafluoropropylene copolymer derived from a structural unit of hexafluoropropylene. The vinylidene fluoride resin may contain, in addition to the structural unit derived from vinylidene fluoride and the structural unit derived from hexafluoropropylene, a material selected from the group consisting of trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, and perfluoroalkyl. A structural unit of at least one monomer of the group consisting of vinyl ether and ethylene.

The content of the structural unit derived from hexafluoropropylene contained in the vinylidene fluoride-hexafluoropropylene copolymer is preferably from 10 to 30% by mass, more preferably from 10 to 25% by mass. The content of the structural unit derived from vinylidene fluoride contained in the vinylidene fluoride-hexafluoropropylene copolymer is preferably from 70 to 90% by mass, more preferably from 75 to 90% by mass. In addition, in vinylidene fluoride resin In 100% by mass, the total amount of the structural unit derived from vinylidene fluoride and the content of the structural unit derived from hexafluoropropylene is preferably 100% by mass. The structural unit derived from the monomers is 100% by mass based on the total constituent unit of the vinylidene fluoride resin, preferably 25% by mass or less, more preferably 20% by mass or less, still more preferably 15% by mass or less.

The vinylidene fluoride resin is a melt mass flow rate (MFR) at 230 ° C measured in accordance with JIS K7210 at a load of 3.8 kg, and is usually from 0.1 to 40 g/10 min. The upper limit of the above MFR is preferably 35 g/10 min, more preferably 30 g/10 min, still more preferably 25 g/10 min, and particularly preferably 20 g/10 min. The lower limit of the above MFR is preferably 0.2 g/10 min, more preferably 0.5 g/10 min. When the MFR of the vinylidene fluoride resin is too large, the transparency of the obtained film tends to decrease when used for a long period of time, and when the MFR of the vinylidene fluoride resin is too small, the film formability tends to decrease.

The weight average molecular weight (Mw) of the vinylidene fluoride resin determined by GPC measurement is preferably from 100,000 to 500,000, more preferably from 150,000 to 450,000, still more preferably from 200,000 to 450,000.

When the Mw of the vinylidene fluoride resin is larger, the obtained film tends to have higher transparency after being exposed to an environment of 60° C. and a relative humidity of 90%. However, when the Mw is too large, the film formability tends to decrease. .

The vinylidene fluoride resin is industrially produced by a suspension polymerization method or an emulsion polymerization method. In the suspension polymerization method, water is used as a vehicle, a monomer is dispersed as a droplet in a vehicle by a dispersing agent, and an organic peroxide dissolved in a monomer is polymerized as a polymerization initiator. Thereby, a granular polymer of 100 to 300 μm was obtained. Compared to emulsion polymers, The suspension polymer is preferred because it has a simple manufacturing process, is excellent in handleability to powders, and does not contain an alkali metal-containing emulsifier or salting-out agent such as an emulsion polymer. The amount of the alkali metal contained in the vinylidene fluoride resin is preferably 1 ppm or less. Thereby, the display member including the molded body of the present invention can suppress white turbidity which has occurred in the past even when it is used in an environment of high temperature and high humidity.

A commercially available product can also be used as the vinylidene fluoride resin. Examples of preferred commercial products include T#2950 of "KF Polymer (registered trademark)" by Kureha and 21508 of "SOLEF (registered trademark)" by Solvay Co., Ltd.

<Resin composition>

The resin composition of the present invention contains 45 to 60 parts by mass of (meth)acrylic resin and 40 parts by weight of vinylidene fluoride resin per 100 parts by mass of the total of (meth)acrylic resin and vinylidene fluoride resin. 55 parts by mass. It is preferable that the total amount of the (meth)acrylic resin and the vinylidene fluoride resin is 47 to 60 parts by mass of the (meth)acrylic resin and 40 to 53 parts by mass of the vinylidene fluoride resin per 100 parts by mass. More preferably, the total amount of the (meth)acrylic resin and the vinylidene fluoride resin is 50 to 60 parts by mass of the (meth)acrylic resin and 40 to 50 parts by mass of the vinylidene fluoride resin per 100 parts by mass. The total content of the (meth)acrylic resin and the vinylidene fluoride resin in 100% by mass of the resin composition is preferably 90% by mass or more, and more preferably 95% by mass or more.

The resin composition may further contain a vinylidene fluoride resin other than the vinylidene fluoride-hexafluoropropylene copolymer, and the content thereof is in the resin composition 100. The mass % is preferably 10% by mass or less. Examples of the vinylidene fluoride resin other than the vinylidene fluoride-hexafluoropropylene copolymer are represented by commercially available product names, and T#1300 and T#1100 of "KF Polymer (registered trademark)" of Kureha are listed. , T#1000, T#850, W#850, W#1000, W#1100, and W#1300, and 6012, 6010, 6008, 31508, etc. of "SOLEF (registered trademark)" manufactured by Solvay Co., Ltd.

The alkali metal contained in the resin composition may, for example, be sodium or potassium derived from an emulsifier which is obtained by using the above-mentioned emulsion polymerization as a vinylidene fluoride resin. When the total content of the alkali metals in the resin composition is smaller, the transparency of the obtained film tends not to decrease when used for a long period of time, and is preferable. The range is usually 50 ppm or less, preferably 30 ppm or less, more preferably 10 ppm or less, and still more preferably substantially no. The content of the alkali metal in the resin composition can be determined, for example, by inductively coupled plasma mass spectrometry (ICP/MS).

Further, various additives generally used may be added to the resin composition of the present invention within a range not inhibiting the effects of the present invention. The additives may, for example, be stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, colorants, foaming agents, lubricants, mold release agents, antistatic agents, flame retardants, polymerization inhibitors, flame retardant aids, Coloring agents such as reinforcing agents, nucleating agents, and bluing agents.

Examples of the colorant include a compound having an anthracene skeleton, a compound having a phthalocyanine skeleton, and the like. Among these, from the viewpoint of heat resistance, a compound having an anthracene skeleton is preferred.

When using bluing agent as a coloring agent, the content is 0.01 It is up to 5 ppm, preferably from 0.05 to 4 ppm, more preferably from 0.1 to 3 ppm. The bluing agent can be suitably used by a known person. For example, Macrolex (registered trademark) Blue RR (manufactured by Bayer), Macrolex (registered trademark) Blue 3R (manufactured by Bayer), and Sumiplast (registered trademark) Violet B (Sumika) are listed as a product. Chemex Co., Ltd. and Polysynthren (registered trademark) Blue RLS (manufactured by Clariant Co., Ltd.).

These additives may be contained in the resin composition of the present invention, and may be contained in any one of a (meth)acrylic resin or a vinylidene fluoride resin, and the additives may be (meth)acrylic acid described later. The resin may be added during melt-kneading with the vinylidene fluoride resin, or may be added after melt-kneading of the (meth)acrylic resin and the vinylidene fluoride resin, or may be added when the film is formed using the resin composition.

The resin composition of the present invention is usually obtained by kneading a (meth)acrylic resin and a vinylidene fluoride resin. This kneading can be carried out, for example, by a method comprising the steps of melt-kneading at a temperature of 150 to 350 ° C at a shear rate of 10 to 1000 / sec.

When the temperature at the time of melt-kneading is less than 150 ° C, there is a fear that the resin is not melted. On the other hand, when the temperature at the time of melt-kneading exceeds 350 ° C, there is a fear that the resin is thermally decomposed. Further, when the shearing speed at the time of melt-kneading is less than 10/sec, there is a fear that the kneading is not sufficiently performed. On the other hand, when the shearing speed at the time of melt-kneading exceeds 1000/sec, the resin may be decomposed.

In order to obtain a resin composition in which the components are more uniformly mixed, the melt kneading system is preferably at 180 to 300 ° C, more preferably at 200 to The temperature is carried out at a temperature of 300 ° C, preferably at a shear rate of 20 to 700 / sec, more preferably 30 to 500 / sec.

The machine used for the melt kneading can use a general mixer or a kneader. Specific examples include a uniaxial kneader, a biaxial kneader, a multi-axis extruder, a Henschel mixer, a Banbury mixer, a kneader, a grinder, and the like. Further, when the cutting speed is increased within the above range, a high shearing processing device or the like can be used.

<film>

The film of the present invention is formed from the above-described resin composition of the present invention. The thickness of the film is preferably from 100 to 2000 μm, more preferably from 200 to 1500 μm.

The film of the present invention is exposed to a haze (Haze) measured according to JIS K7136 after exposure for a long time, for example, 120 hours, even in a high-temperature, high-humidity environment such as 60 ° C and a relative humidity of 90%. That is, the film of the present invention can suppress whitening of a film which is produced under a high temperature and high humidity heat environment. The above haze is preferably 1.8% or less, more preferably 1.5% or less. The smaller the value, the more whitening of the inhibiting film appears. Further, the amount of change in the haze value before and after the long-term exposure of the film of the present invention in a high-temperature, high-humidity heat environment is preferably 10 points or less, more preferably 5 points or less, still more preferably 1 point or less, and particularly preferably 0.5 points or less.

<Laminated body>

An embodiment of the laminated body of the present invention has the form of the film and the thermoplastic resin layer (second laminate). This laminate is excellent in heat resistance and surface hardness. The thermoplastic resin layer may be laminated on at least one side of the film formed of the resin composition of the present invention, and does not necessarily have to be The film is contacted and laminated through other layers. The thermoplastic resin layer is preferably laminated with a thermoplastic resin layer in a state in which it is in contact with a film formed of the resin composition of the present invention. From the viewpoint of maintaining the shape of the film, the laminate preferably has a thermoplastic resin layer on both sides of the film. The laminate may be a coating layer (third laminate) which is further provided below.

The thickness of the thermoplastic resin layer is preferably from 10 to 200 μm, more preferably from 50 to 150 μm. When the laminated body contains the thermoplastic resin layer on both surfaces of the film, the thickness and composition of each of the thermoplastic resin layers may be the same or different from each other, but from the viewpoint of maintaining the shape of the film, they are preferably substantially identical to each other.

The pencil hardness measured according to JIS K5600-5-4 of the thermoplastic resin layer is preferably HB or more, more preferably F or more, and still more preferably H or more. The thicard softening temperature of the thermoplastic resin layer measured in accordance with JIS K7206 is preferably from 100 to 150 °C.

The thermoplastic resin layer can be selected from one or more types of (meth)acrylic resins or one or more types of thermoplastic resins other than (meth)acrylic resins. One or a plurality of types of thermoplastic resins may be used from the resins, either singly or in combination. The thermoplastic resin layer may have a single layer structure or a laminate of a plurality of layers.

As the (meth)acrylic resin of the thermoplastic resin layer, a resin having the same order of structure as the (meth)acrylic resin contained in the above-mentioned resin composition of the present invention can be used. For example, a homopolymer of methyl methacrylate can be used, which is composed of 50 to 99.9% by mass of the structural unit derived from methyl methacrylate and 0.1 to 50% by mass of the structural unit derived from methyl acrylate. a copolymer obtained by introducing a methyl methacrylate resin having a lactone ring structure, a copolymer composed of a structural unit derived from methyl methacrylate and a structural unit derived from methacrylic acid, or a structure derived from styrene A unit, a structural unit derived from maleic acid, a terpolymer composed of a structural unit derived from methyl methacrylate, or the like. The weight average molecular weight (Mw) of the (meth)acrylic resin is preferably from 50,000 to 300,000, more preferably from 70,000 to 250,000. In the laminate including the thermoplastic resin layer and the film formed of the resin composition, the (meth)acrylic resin contained in the thermoplastic resin layer and the (meth)acrylic acid contained in the resin composition forming the film The resins may be the same or different.

As the thermoplastic resin other than the (meth)acrylic resin, a carbonate resin, a cycloolefin resin, an ethylene terephthalate resin, a styrene resin, a methyl methacrylate-styrene resin, or a propylene can be used. Nitrile-styrene resin, ABS resin, and the like. From the viewpoint of heat resistance, the thermoplastic resin other than the (meth)acrylic resin is preferably a thicard softening temperature measured according to JIS K7206 of 115 ° C or higher, and more preferably 117 ° C or higher. It is even better if it is above 120 °C.

Examples of the carbonate-based resin include polycarbonate resins. When the thermoplastic resin layer is a polycarbonate resin layer, the polycarbonate resin layer may be formed of one or more types of polycarbonate resins, or one or more types of polycarbonate resins and one or more types of polycarbonate resins. A composite resin of a thermoplastic resin is formed. These polycarbonate resins are preferably those having a melt volume flow rate (hereinafter also referred to as MVR) measured at a temperature of 300 ° C and a load of 1.2 kg of 3 to 120 cm ³ / 10 minutes. The MVR is preferably from 3 to 80 cm ³ /10 minutes, more preferably from 4 to 40 cm ³ /10 minutes, and particularly preferably from 10 to 40 cm ³ /10 minutes. When the MVR is less than 3 cm ³ /10 minutes, the fluidity is lowered, and the molding process such as melt coextrusion molding tends to be difficult to proceed, or the appearance is poor. When the MVR exceeds 120 cm ³ / 10 minutes, the mechanical properties such as the strength of the polycarbonate resin layer tend to be lowered. The MVR can be measured in accordance with JIS K 7210 under the conditions of a load of 1.2 kg at 300 °C.

Examples of the polycarbonate resin include a carbonium chloride method in which various dihydroxydiaryl compounds are reacted with phosgene, or a transesterification reaction between a dihydroxydiaryl compound and a carbonate such as diphenyl carbonate. The polymer obtained by the method is exemplified by a polycarbonate resin produced from 2,2-bis(4-hydroxyphenyl)propane (commonly known as bisphenol A).

The above dihydroxydiaryl compound may be exemplified by bisphenol A such as bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis (4). -hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxyphenyl-3-methyl Phenyl)propane, 1,1-bis(4-hydroxy-3-tert-butylphenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-double a bis(hydroxyaryl)alkane such as (4-hydroxy-3,5-dibromophenyl)propane or 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, such as 1,1 a bis(hydroxyaryl)cycloalkane such as bis(4-hydroxyphenyl)cyclopentane or 1,1-bis(4-hydroxyphenyl)cyclohexane, such as 4,4'-dihydroxydiphenyl a dihydroxydiaryl ether such as an ether or 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether, such as a dihydroxydiaryl group such as 4,4'-dihydroxydiphenyl sulfide. Thioethers such as 4,4'-dihydroxydiphenylarylene, 4,4'-dihydroxy-3,3'-dimethyldiphenylarylene, etc. For example, dihydroxydiaryl guanidines such as 4,4'-dihydroxydiphenylanthracene, 4,4'-dihydroxy-3,3'-dimethyldiphenylanthracene.

These may be used alone or in combination of two or more types, and in addition to these, a pipe may be mixed. And dipiperidinylhydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, etc. are used.

Further, the above dihydroxydiaryl compound may be used in combination with a ternary or higher phenol compound shown below. Examples of phenols of more than 3 yuan include: phloroglucin, 4,6-dimethyl-2,4,6-tris-(4-hydroxyphenyl)-heptene, 2,4,6-dimethyl -2,4,6-tris-(4-hydroxyphenyl)-heptane, 1,3,5-tris-(4-hydroxyphenyl)-benzene, 1,1,1-tri-(4- Hydroxyphenyl)-ethane and 2,2-bis-[4,4-(4,4'-dihydroxydiphenyl)-cyclohexyl]-propane.

When the polycarbonate resin layer is formed of a composite resin of a thermoplastic resin other than one or more kinds of polycarbonate resins and one or more types of polycarbonate resins, the polymerization can be adjusted without impairing the transparency. A thermoplastic resin other than a carbonate resin. As the thermoplastic resin, for example, a (meth)acrylic resin which is compatible with a polycarbonate resin is preferable, and a methacrylic resin which has an aromatic ring or a cyclic olefin in the structure is more preferable. When the polycarbonate resin contains such a methacrylic resin, the surface hardness of the obtained polycarbonate resin layer can be made higher than when formed by a polycarbonate resin alone.

The polycarbonate resin other than the above polycarbonate resin may, for example, be a polycarbonate synthesized from isosorbide and an aromatic diol. For example, "DURABIO (registered trademark)" manufactured by Mitsubishi Chemical Corporation can be cited.

Insofar as the effects of the present invention are not impaired, The polycarbonate resin contains an additive such as a release agent, an ultraviolet absorber, a dye, a pigment, a polymerization inhibitor, an antioxidant, a flame retardant, and a reinforcing agent, and a polymer other than the polycarbonate resin.

A commercially available product may be used as the polycarbonate resin, and for example, 301-4, 301-10, 301-15, 301-22, 301-30, 301 of "Calibre (registered trademark)" by Sumika Styron Polycarbonate Co., Ltd. -40, SD2221W, SD2201W, TR2201, etc.

When a thermoplastic resin layer is used in combination of two or more kinds of (meth)acrylic resins, or when a (meth)acrylic resin is mixed with another thermoplastic resin, each of the thermoplastic resins constituting the thermoplastic resin layer is used. Among 100 parts by mass, it is preferred to contain 50 parts by mass or more of a (meth)acrylic resin. The thermoplastic resin other than the (meth)acrylic resin is preferably a thermoplastic resin compatible with the (meth)acrylic resin. A heat which is compatible with a homopolymer of methyl methacrylate or a copolymer composed of 50 to 99.9% by mass of a structural unit derived from methyl methacrylate and 0.1 to 50% by mass of a structural unit derived from methyl acrylate. Examples of the plastic resin include Rejisufai (registered trademark) R-100, R-200 manufactured by Denki Chemical Co., Ltd., and Altuglas (registered trademark) HT-121 manufactured by Arkema Co., Ltd., and the like.

The thermoplastic resin layer preferably contains substantially no vinylidene fluoride resin.

The film of the present invention is transparent when visually observed, and the total light transmittance (Tt) measured according to JIS K7361-10 is preferably 88% or more, more preferably 90% or more, and 60 ° C, relative humidity. It is also maintained in this range after 120 hours of exposure in 90% of the environment.

The film of the present invention contains a (meth)acrylic resin and a vinylidene fluoride resin, and after exposure to an environment of 60 ° C and a relative humidity of 90% for 120 hours, the haze measured according to JIS K7136 is usually 2% or less, preferably 1.8% or less, more preferably 1.5% or less.

Further, the film of the present invention has a relative permittivity of 3 V or 100 kHz, which is usually 4 or more, preferably 4.1 or more, measured by an auto balance bridge method in accordance with JIS K6911. Further, the laminate of the present invention has a relative permittivity at 3 V and 100 kHz, which is usually 3.5 or more, preferably 3.6 or more, and more preferably 3.8 or more, measured by an automatic balance bridge method in accordance with JIS K6911. The value of the relative permittivity described above is the value measured before exposing the film to high temperature and high humidity.

The film of the present invention can be produced by molding the above-described resin composition of the present invention by, for example, a melt extrusion molding method, a hot extrusion method, an injection molding method, or the like.

The film obtained by molding the resin composition of the present invention by the above-described molding may be bonded to a thermoplastic resin layer obtained by molding, for example, by bonding an adhesive or an adhesive, thereby producing a laminate. However, it is preferred to form a laminate by integrating a resin composition of the present invention with a (meth)acrylic resin by melt coextrusion molding. Compared with the laminate produced by lamination, the laminate produced by melt coextrusion molding tends to be easily formed by secondary molding.

In the melt-coextrusion molding, for example, the resin composition of the present invention and the (meth)acrylic resin are separately supplied to two or three one-axis or two-axis extruders, and each of them is melt-kneaded and then passed through a feed. Mold or A multi-manifold mold or the like is a method in which a film of the present invention and a thermoplastic resin layer are laminated and integrated. The obtained laminated body is preferably cooled and solidified, for example, by a roll unit or the like.

According to another embodiment of the laminated body of the present invention, the film and the coating layer form (first laminate) are disposed on at least one surface of the film, and the coating layer is selected from the group consisting of anti-scratch and anti-reflection. At least one function of a group consisting of anti-glare and anti-fingerprint. The coating layer may be laminated on at least one side of the film, and does not necessarily have to be in contact with the film, and may be laminated through another layer. For the coating layer, for example, a cured film described in JP-A-2013-86273 can be used.

The thickness of the coating layer is preferably from 1 to 100 μm, more preferably from 3 to 80 μm, still more preferably from 5 to 70 μm. When it is thinner than 1 μm, it is difficult to exhibit a function, and when it is thicker than 100 μm, there is a fear that the coating layer is broken.

Antireflection treatment may be applied to the surface of the coating layer by a coating method, a sputtering method, a vacuum evaporation method, or the like, as needed. Further, for the purpose of imparting an antireflection effect, a separately prepared antireflective sheet may be bonded to one surface or both surfaces of the coating layer. The antireflective sheet may be laminated on at least one side of the coating layer, and does not necessarily have to be in contact with the coating layer, and may be laminated through another layer.

When the film of the present invention is abbreviated as the A layer, the thermoplastic resin layer is simply referred to as the B layer, and the coating layer is abbreviated as the C layer, examples of the layer constitution of the film and the laminate of the present invention include the following (1) to (12). By.

(1) A layer

(2) A layer / B layer

(3) B layer / A layer / B layer

(4) B layer / A layer / B layer / A layer / B layer

(5) A layer / C layer

(6) C layer / A layer / C layer

(7) A layer / B layer / C layer

(8) C layer / A layer / B layer / C layer

(9) B layer / A layer / B layer / C layer

(10) C layer / B layer / A layer / B layer / C layer

(11) B layer / A layer / B layer / A layer / B layer / C layer

(12) C layer / B layer / A layer / B layer / A layer / B layer / C layer

When the film of the present invention is the A layer and the thermoplastic resin layer is the B layer, the layered body composed of the B layer/A layer/B layer can be produced in the following manner. This is illustrated in Figure 1.

First, a (meth)acrylic resin and a vinylidene fluoride resin which are forming materials of the layer A are mixed to obtain a resin composition of the present invention. Next, the resin composition is melted by the uniaxial extruders 1 and 3 by the uniaxial extruder 2 and the thermoplastic resin which is a material for forming the layer B, respectively. Then, the through-feed molds 4 are laminated so as to have a configuration shown by the B layer/A layer/B layer, and extruded from the multi-manifold mold 5 to obtain a film-shaped molten resin 6. The film-shaped molten resin 6 is sandwiched between the first cooling roll 7 and the second cooling roll 8 which are disposed to face each other, and then sandwiched between the second cooling roll 8 and the second cooling roll 8 After the gap between the first cooling roller 9 and the third cooling roller 9, the third cooling roller 9 is adhered to the third cooling roller 9, and the laminated body 10 having a three-layer structure is obtained.

<Transparent Conductive Sheet>

A transparent conductive film is formed on at least one surface of the film or laminate of the present invention to obtain a transparent conductive sheet.

As a method of forming a transparent conductive film on the surface of the film or laminate of the present invention, a method of directly forming a transparent conductive film on the surface of the film of the present invention or a method of laminating a plastic film having a transparent conductive film formed in advance may be employed. A method of forming a transparent conductive film by the surface of the film or laminate of the invention.

The film substrate which is a plastic film in which the transparent conductive film is formed in advance may be a transparent film, and may be a substrate which can form a transparent conductive film, and examples thereof include polyethylene terephthalate and polynaphthalene. Ethylene formate, polycarbonate, acrylic resin, polyamine, mixtures or laminates thereof, and the like. Further, before the formation of the transparent conductive film, it is effective to apply the film in advance for the purpose of improving the surface hardness, preventing the Newton's ring, and imparting antistatic properties.

The method of laminating a film in which a transparent conductive film is formed in advance on the surface of the film or laminate of the present invention may be any method as long as it can obtain a uniform and transparent sheet free from bubbles. A method of laminating by an adhesive which is hardened by normal temperature, heat, ultraviolet light or visible light, or a transparent adhesive tape can be used.

As a film forming method of the transparent conductive film, a vacuum vapor deposition method, a sputtering method, a CVD method, an ion plating method, a spray method, or the like is known, and such a method can be suitably used depending on the film thickness required.

In the case of sputtering, for example, an oxide target can be used. A general sputtering method for materials, a reactive sputtering method using a metal target, and the like. At this time, oxygen, nitrogen, or the like can be introduced as a reactive gas, or a combination of ozone addition, plasma irradiation, and ion assist can be used. Further, a bias voltage such as direct current, alternating current, or high frequency may be applied to the substrate as needed. Examples of the transparent conductive metal oxide used in the transparent conductive film include indium oxide, tin oxide, zinc oxide, indium-tin composite oxide, tin-bismuth composite oxide, zinc-aluminum composite oxide, and indium- Zinc composite oxide and the like. Among these, indium-tin composite oxide (ITO) is suitable from the viewpoints of environmental stability and circuit workability.

Further, a method of forming a transparent conductive film may be a method in which a coating agent containing various conductive polymers capable of forming a transparent conductive film is applied and cured by irradiation with radiation or ultraviolet radiation or the like. Wait. As the conductive polymer, polythiophene, polyaniline, polypyrrole or the like is known, and such a conductive polymer can be used.

The thickness of the transparent conductive film is not particularly limited, but when a transparent conductive metal oxide is used, it is usually 50 to 2000 Å, preferably 70 to 1000 Å. When it is in this range, both electrical conductivity and transparency are excellent.

The thickness of the transparent conductive sheet is not particularly limited, and an optimum thickness can be selected in accordance with the product specifications of the display.

<Touch Sensor Panel>

The film or laminate of the present invention and the transparent conductive sheet comprising the film or laminate can be suitably used as a transparent electrode such as a display panel or a touch screen. Specifically, the film or laminate of the present invention can be used as a window sheet for a touch screen. Further, the film or laminate of the present invention can be made of a transparent conductive sheet. It is an electrode substrate for a touch screen of a resistive film type or a capacitance type. By arranging the touch screen with a window sheet or a touch screen on the front side of the liquid crystal display, the organic EL display, or the like, a touch sensor panel having a touch screen function can be obtained.

When the film or laminate of the present invention is used as a window sheet for a touch screen, the touch screen window sheet can be used as a substitute for a glass sheet disposed on the outermost surface of a liquid crystal display or an organic EL display. In addition, the touch screen window sheet can also be used for a plasma display, a field emission display (FED), a SED type flat display, electronic paper, and the like.

Fig. 2 is a schematic cross-sectional view showing a general electrostatic capacitance touch sensor panel using the film or laminate of the present invention and a transparent conductive sheet comprising the film or laminate. In the drawings, 11 denotes a window sheet obtained by the film of the present invention, 14 denotes a transparent conductive sheet comprising the film or laminate of the present invention, 12 denotes an optical adhesive layer, and 13 denotes a liquid crystal display device. When the user touches a finger on any position on the window sheet during driving, the transparent conductive sheet detects the distance from the terminal position to the touch position, and becomes a structure for detecting the touch position. Thereby, the coordinates of the touched portion on the recognition panel are formed to achieve an appropriate interface function.

Fig. 3 is a cross-sectional view showing an example of a liquid crystal display device using the film or laminate of the present invention. The film or laminate 20 of the present invention can be laminated on the polarizing plate 21 through an optical adhesive, and the laminated body can be disposed on the viewing side of the liquid crystal cell 23. A polarizing plate is usually disposed on the back side of the liquid crystal cell. The liquid crystal display device 25 is composed of such a member. In addition, FIG. 3 is only an example of a liquid crystal display device, and is not limited to this configuration.

(Example)

The present invention will be specifically described below by way of examples and comparative examples, but the present invention is not limited to the examples.

The (meth)acrylic resin used in the examples and comparative examples and their physical properties are shown in Table 1. In addition, the Fika softening point (VST) in Table 1 is based on the B50 method specified in JIS K 7206:1999 "Plastic-Thermoplastic Plastic-Fika Softening Temperature (VST) Test Method", using a thermal deformation tester [( The "148-6 continuous type" manufactured by Yasuda Seiki Co., Ltd. was measured. The test piece at this time was measured by extruding each raw material into a thickness of 3 mm.

The melt mass flow rate (MFR) is measured in accordance with the method specified in JIS K 7210:1999 "Test method for melt mass flow rate (MFR) and melt volume flow rate (MVR) of plastic-thermoplastic plastics". The poly(methyl methacrylate)-based material was measured at a temperature of 230 ° C and a load of 3.80 kg (37.3 N) as specified in JIS.

The weight average molecular weight (Mw) of the methacrylic resin was measured by a gel permeation chromatography (GPC). GPC's calibration line is made using methyl propylene produced by Showa Denko (s) with a narrow molecular weight distribution and known molecular weight. As the standard reagent, the enoic acid resin was used as a calibration curve from the elution time and the molecular weight, and the weight average molecular weight of each resin composition was measured. Specifically, 40 mg of a resin was dissolved in 20 ml of a tetrahydrofuran (THF) solvent to prepare a measurement sample. For the measurement device, two columns of "TSKgel SuperHM-H" and "SuperH2500", which are made of TOSOH (stock), are arranged in series, and the detector uses an RI detector. The measured molecular weight distribution curve was based on the molecular weight on the horizontal axis as a logarithm, and the fitting was performed using the normal distribution function of the following (Formula 1).

The vinylidene fluoride-hexafluoropropylene copolymer used in the examples, and the vinylidene fluoride-chlorotrifluoroethylene copolymer and polyvinylidene fluoride used in the comparative examples and their physical properties are shown in Table 2. Further, "VDF" in Table 2 means a structural unit derived from vinylidene fluoride contained in a vinylidene fluoride-hexafluoropropylene copolymer, a vinylidene fluoride-chlorotrifluoroethylene copolymer or a polyvinylidene fluoride. The content ratio (% by mass), "HFP" in Table 2 indicates that the vinylidene fluoride-hexafluoropropylene copolymer, the vinylidene fluoride-chlorotrifluoroethylene copolymer or the polyvinylidene fluoride is contained in the six The content ratio (% by mass) of the structural unit of fluoropropene. The "CETF" in Table 2 indicates the content of the structural unit derived from chlorotrifluoroethylene contained in the vinylidene fluoride-hexafluoropropylene copolymer, the vinylidene fluoride-chlorotrifluoroethylene copolymer or the polyvinylidene fluoride. Ratio (% by mass). VDF, HFP and CETF were determined by NMR. Specifically, in the manner of 20 to 30 mg/ml in N,N-dimethylformamide (DMF)-d7 Each of the copolymers was dissolved, and the measurement was carried out under the conditions of an integrated count of 64 times, an observation core of 19 F, and a resonance frequency of 282 MHz using INOVA300 manufactured by Varian.

The weight average molecular weight (Mw) of the vinylidene fluoride-hexafluoropropylene copolymer, the vinylidene fluoride-chlorotrifluoroethylene copolymer or the polyvinylidene fluoride was measured by GPC. The GPC calibration curve was prepared by using polystyrene as a standard reagent, and the elution time and molecular weight were used as a calibration curve, and the weight average molecular weight of each resin was measured. Specifically, 40 mg of a resin was dissolved in 20 ml of a N-methylpyrrolidone (NMP) solvent to prepare a measurement sample. The measuring device uses the following: a column made of TOSOH (stock) "TSKgel" Two SuperHM-H and one SuperH2500 are arranged in series and the detector uses an RI detector.

<Example 1>

55 parts by mass of SUMIPEX (registered trademark) MM (manufactured by Sumitomo Chemical Co., Ltd.) and 45 parts by mass of PVDF copolymer A were dry blended, and a Labo Plastomill (20 mm granulator) manufactured by Toyo Seiki Seisakusho Co., Ltd. was used. Melt kneading was carried out at 260 ° C to obtain composite particles. A film having a thickness of 800 μm was produced from the obtained composite particles at a set temperature of 220 ° C using an extrusion molding machine. The obtained film was visually observed to be colorless and transparent.

<Example 2>

A film having a thickness of 800 μm was produced in the same manner as in Example 1 except that 50 parts by mass of SUMIPEX (registered trademark) MM (manufactured by Sumitomo Chemical Co., Ltd.) and 50 parts by mass of PVDF copolymer A were used. The obtained film was visually observed to be colorless and transparent.

<Comparative Example 1>

A film having a thickness of 800 μm was produced in the same manner as in Example 1 except that the PVDF copolymer A was replaced with KF Polymer (registered trademark) T#1300 (manufactured by Kureha Co., Ltd.). The obtained film was visually observed to be colorless and transparent.

<Comparative Example 2>

A film having a thickness of 800 μm was produced in the same manner as in Example 1 except that PVDF copolymer B was used instead of PVDF copolymer A. The obtained film was visually observed to be colorless and transparent.

<Comparative Example 3>

A film having a thickness of 800 μm was produced in the same manner as in Example 1 except that SOPEF (registered trademark) 31508 (manufactured by Solvay) was used instead of PVDF copolymer A, and the obtained film was visually observed to be white.

The amount of the alkali metal (Na + K) contained in the obtained film is shown in Table 3. The alkali metal content is measured by inductively coupled plasma mass spectrometry.

The relative permittivity of each of the films at 3 V and 100 kHz measured by the automatic balance bridge method according to JIS K6911 is shown in Table 3.

<High temperature and high humidity exposure test>

The films obtained in Examples 1 and 2 and Comparative Examples 1 to 3 were placed in a constant temperature and humidity oven at 60 ° C and an absolute humidity of 90% for 120 hours, thereby performing a high temperature and high humidity exposure test. The haze (Haze) measured according to JIS K7136:2000 and the total light transmittance (Tt) measured according to JIS K7361-1:1997 before and after the high-temperature and high-humidity exposure test are shown in Table 3, respectively. The haze and the total light transmittance are in accordance with JIS K 7361-1:1997 "Test Method for Total Transmittance of Plastic-Transparent Materials - Part 1: Single Beam Method" by Haze Transmittance [(股) Murakami The measurement was carried out by "HR-100" manufactured by Color Technology Research Institute.

<Example 3>

The films obtained in Examples 1 and 2 can be used as a base material for a display window sheet and/or a transparent conductive sheet, and used in a touch sensor panel having a configuration as shown in the cross-sectional view of Fig. 2 .

<Example 4>

Each of SUMIPEX MM and SOLEF 21508 shown in Tables 1 and 2 as a methacrylic resin and a vinylidene fluoride resin was mixed at a ratio shown in Table 4 to obtain a resin composition (A) which forms the intermediate layer (A). For the thermoplastic resin layers (B) and (C), SUMIPEX MH shown in Table 1 was used. The laminate was produced by the following method using the apparatus shown in Fig. 1. Referring to Fig. 1, the resin composition (A) is passed through 65 mm. Single-axis extruder 2 [Toshiba Machine Co., Ltd.], SUMIPEX MH via 45mm The single-shaft extruders 1 and 3 (manufactured by Hitachi Shipbuilding Co., Ltd.) were separately melted. Then, the three types of three-layer distribution type feed molds 4 which are supplied to the set temperature of 230 to 270 ° C are distributed in a three-layer configuration, and the multi-manifold mold 5 (manufactured by Hitachi Shipbuilding Co., Ltd.) The extrusion was carried out so as to form a structure as shown in the B layer/A layer/C layer, and a film-shaped molten resin 6 was obtained. The obtained film-shaped molten resin 6 is sandwiched between the first cooling roll 7 (diameter: 350 mm) and the second cooling roll 8 (diameter: 450 mm) which are disposed to face each other, and the second roll 8 is wound up. It is sandwiched between the second roller 8 and the third roller 9 (diameter 350 mm). Thereafter, the third cooling roll 9 was taken up and subjected to molding cooling to obtain a laminated body 10 having three layers each having an average value of the film thickness shown in Table 4. The obtained laminate 10 had a total film thickness of about 800 μm and was visually observed to be colorless and transparent.

The resulting laminate was carried out in the same manner as in Example 1. Relative permittivity measurement of the body, as well as high temperature and high humidity exposure tests. The results are shown in Table 5.

<Example 5>

A laminate was obtained in the same manner as in Example 4 except that the thermoplastic resin layer was formed by Calibre (registered trademark) 301-30. Table 6 shows the content and layer constitution of the resin composition. The laminate is colorless and transparent. Further, in the same manner as in Example 1, the relative permittivity measurement of the obtained laminate and the high-temperature and high-humidity exposure test were carried out. The results are shown in Table 7.

<Example 6>

The display device can be produced by using the film obtained in Examples 1 and 2 or the laminate obtained in Examples 4 and 5 as a window sheet for display.

(industrial availability)

The film formed of the resin composition of the present invention can be used in a smart phone, a portable game machine, a music player, a panel terminal device, etc. because of its high relative permittivity and long-term use. A touch sensor panel or a window sheet of a display device is useful.

11‧‧‧Windows Sheet

12‧‧‧Optical adhesive layer

13‧‧‧Liquid crystal display device

14‧‧‧Transparent conductive foil

Claims (20)

A resin composition containing a (meth)acrylic resin and a vinylidene fluoride resin, wherein the (meth)acrylic resin and the vinylidene fluoride resin are contained in a total amount of (meth)acrylic acid per 100 parts by mass of the (meth)acrylic resin and the vinylidene fluoride resin. 45 to 60 parts by mass of the resin and 40 to 55 parts by mass of the vinylidene fluoride resin, and the vinylidene fluoride resin is 100% by mass based on the total constituent unit, and contains 65 to 90% of the structural unit derived from vinylidene fluoride. %, and 10 to 35 mass% of a vinylidene fluoride-hexafluoropropylene copolymer derived from a structural unit of hexafluoropropylene. The resin composition according to claim 1, wherein the (meth)acrylic resin is the following resin of (a1) or (a2): (a1) a homopolymer of methyl methacrylate; (a2) a copolymer containing from 50 to 99.9% by mass of the structural unit derived from methyl methacrylate and from 0.1 to 50% by mass of at least one structural unit derived from the (meth) acrylate represented by the formula (1), In the formula, R ₁ represents a hydrogen atom or a methyl group, when R ₁ is a hydrogen atom, R ₂ represents an alkyl group having 1 to 8 carbon atoms, and when R ₁ is a methyl group, R ₂ represents an alkyl group having 2 to 8 carbon atoms. The resin composition according to claim 1 or 2, wherein the weight average molecular weight (Mw) of the (meth)acrylic resin is 70,000 to 300,000. The resin composition according to any one of claims 1 to 3, wherein the total content of the alkali metals contained in the resin composition is 50 ppm or less. The resin composition according to any one of claims 1 to 4, wherein the vinylidene fluoride resin has a melt mass flow rate (MFR) of 0.1 to 30 g/10 min. A film formed by the resin composition according to any one of claims 1 to 5. A film comprising a (meth)acrylic resin and a vinylidene fluoride resin, wherein the vinylidene fluoride resin is a structural unit 65 derived from vinylidene fluoride, based on 100% by mass of the total constituent unit thereof 90% by mass, and 10 to 35 mass% of a vinylidene fluoride-hexafluoropropylene copolymer derived from a structural unit of hexafluoropropylene, wherein the relative permittivity of the film is 4.0 or more, and the environment is 60 ° C and a relative humidity of 90%. The haze after 120 hours of exposure was 2% or less. The film of claim 6 or 7, wherein the film has a thickness of 100 to 2000 μm. A film or a coating layer according to any one of claims 6 to 8, wherein the coating layer is disposed on at least one side of the film, and at least one type is provided. The layer of functionality. A second laminate comprising the film according to any one of claims 6 to 8, and a thermoplastic resin layer. The second laminate according to claim 10, wherein the thermoplastic resin layer is composed of a plurality of thermoplastic resin layers and is disposed on both surfaces of the film. The second layered body according to the above-mentioned item, wherein the thermoplastic resin layer contains 50 parts by mass or more per 100 parts by mass of the thermoplastic resin constituting the thermoplastic resin layer ( Methyl) acrylic resin. The second laminate according to claim 12, wherein the (meth)acrylic resin has a weight average molecular weight (Mw) of 50,000 to 300,000. The second laminate according to any one of claims 10 to 13, wherein the thermoplastic resin layer has a thickness of 10 to 200 μm. The second laminate according to any one of claims 10 to 14, wherein the thermoplastic resin layer has a phenanthrene softening temperature of 100 to 150 °C. The second layered body according to any one of the items of the present invention, wherein the coating layer is disposed on at least one side of the film, and the coating layer is provided on at least one side of the film. At least one layer of functionality. A touch sensor panel comprising the film according to any one of claims 6 to 8. A touch sensor panel containing the ninth application patent scope The first laminate, the second laminate according to any one of claims 10 to 15, or the third laminate described in claim 17 of the patent application. A display device comprising the film according to any one of claims 6 to 8. A display device comprising the first laminate according to claim 9 of the patent application, the second laminate according to any one of claims 10 to 15 or the 17th application of the patent application. The third layered body.