WO2021095748A1

WO2021095748A1 - Film and method for producing film

Info

Publication number: WO2021095748A1
Application number: PCT/JP2020/041995
Authority: WO
Inventors: 円山口
Original assignee: 三菱瓦斯化学株式会社
Priority date: 2019-11-13
Filing date: 2020-11-11
Publication date: 2021-05-20
Also published as: JP6879444B1; JPWO2021095748A1

Abstract

A transparent film having slidability and suppressed turbidity, and a method for producing a film are provided. This resin composition contains an aromatic polycarbonate resin (A) with a limiting viscosity of less than or equal to 0.37 dL/g, an aromatic polyarylate resin (B) with a limiting viscosity of less than or equal to 0.50 dL/g and an aromatic polyarylate resin (C) with a limiting viscosity of greater than or equal to 0.60 dL/g, and contains 10-70 parts by mass of the aromatic polyarylate resin (B) relative to a total of 30-90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (B).

Description

Film and film manufacturing method

The present invention relates to a film and a method for producing a film.

Transparent conductive films are used in touch panel film sensors, electronic paper, dye-sensitized solar cells, touch sensors, and the like. As shown in FIG. 1, the transparent conductive film 10 is known to be composed of, for example, an electrode layer (transparent conductive film) 11, a base material 12, an adhesive layer 13, and a protective film 14. There is.
For example, Patent Document 1 describes a transparent conductive film laminate having an adhesive layer, a film base material, and a transparent conductive film in this order on a protective film, and at least one of the film base material and the protective film. Has an uneven portion on the surface on the pressure-sensitive adhesive layer side in each end region from one end portion in the width direction and the other end portion to 100 mm inside in the width direction, respectively. The effective roughness R1 of the surface of the uneven portion in each of the end regions is 0.1 to 20 μm, and the pressure-sensitive adhesive layer has the uneven portion of one end region and the other in the width direction. From the position where the distance from the uneven portion of the one end region is 0 to 10 mm from the position where the distance from the uneven portion of the one end region is 0 to 10 mm, the distance from the uneven portion of the other end region is 0 to 10 mm. A transparent conductive film laminate characterized in that it is provided over such positions is disclosed. Further, it is described that a polycarbonate resin is used as the protective film.

On the other hand, a resin composition containing a polycarbonate resin and a polyarylate resin is disclosed in Patent Document 2, Patent Document 3, and the like.

JP-A-2018-152187 Japanese Unexamined Patent Publication No. 2009-040866 Japanese Unexamined Patent Publication No. 05-156147

As described above, a protective film is usually used as the transparent conductive film. Such a protective film is used to protect the base material when transporting the laminate of the electrode layer and the base material. That is, the transparent conductive film is often manufactured by roll-to-roll industrially, but at this time, it is required to improve the transportability of the film and prevent winding wrinkles. Poor film transport and winding wrinkles can be reduced by suppressing adhesion (blocking) between the films. Therefore, for anti-blocking on the opposite side of the electrode layer of the transparent conductive film, the protective film is required to have slidability to the extent that the films do not stack with each other. Further, since the in-line defect inspection is performed on the transparent conductive film with the protective film attached, it is required to be a transparent film in which turbidity is suppressed.
An object of the present invention is to solve such a problem, and to produce a resin composition, a film, and a film capable of providing a transparent film having good slidability and suppressed turbidity. The purpose is to provide a method.

As a result of studies by the present inventor based on the above problems, a polyarylate resin having a low ultimate viscosity and a polyarylate resin having a high limit viscosity are blended with a polycarbonate resin having a low ultimate viscosity to obtain these resins. It has been found that slidability can be imparted to the film while improving compatibility.
Specifically, the above problems have been solved by the following means.
<1> An aromatic polycarbonate resin (A) having an ultimate viscosity of 0.37 dL / g or less, an aromatic polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less, and an aromatic polyarylate resin (B) having an ultimate viscosity of 0.60 dL / g. The above aromatic polyarylate resin (C) is contained, and the aromatic polyarylate resin (B) is added to a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). A resin composition containing 10 to 70 parts by mass.
<2> The resin composition according to <1>, wherein the aromatic polycarbonate resin (A) has an ultimate viscosity of 0.34 dL / g or less.
<3> The resin composition according to <1> or <2>, wherein the difference in the ultimate viscosity between the aromatic polycarbonate resin (A) and the aromatic polyarylate (C) is 0.28 dL / g or more.
<4> The resin according to any one of <1> to <3>, wherein at least one of the glass transition temperature or the plurality of glass transition temperatures measured by a differential scanning calorimeter of the resin composition indicates 150 ° C. or higher. Composition.
<5> The resin composition according to any one of <1> to <4>, which further contains an antioxidant (E).
<6> The resin composition according to any one of <1> to <5>, further comprising a transesterification inhibitor (F).
<7> The resin composition according to any one of <1> to <6>, further containing a release agent (G).
<8> A film formed from the resin composition according to any one of <1> to <7>.
<9> The dynamic friction coefficient measured under the conditions of a thread of 100 mm / min and a load cell of 10 N measured with a film having a root mean square roughness of 0.093 μm is 2.00 or less, according to <8>. Film.
<10> The film according to <8> or <9>, wherein the film thickness is 10 μm or more and 300 μm or less.
<11> The film according to any one of <8> to <10>, wherein the haze is 10% or less.
<12> An anti-blocking film formed from the resin composition according to any one of <1> to <7>.
<13> The dynamic friction coefficient measured under the conditions of a thread of 100 mm / min and a load cell of 10 N measured with a film having a root mean square roughness of 0.093 μm is 2.00 or less, according to <12>. Anti-blocking film.
<14> The anti-blocking film according to <12> or <13>, wherein the film thickness is 10 μm or more and 300 μm or less.
<15> The anti-blocking film according to any one of <12> to <14>, wherein the haze is 10% or less.
The film according to any one of <16><8> to <11>, or the anti-blocking film according to any one of <12> to <15>, the pressure-sensitive adhesive layer, and the base material. , A transparent conductive film having an electrode layer in this order.
<17> A method for producing a film, wherein the resin composition according to any one of <1> to <7> is extruded into a sheet in a molten state and pressure-bonded with a pair of rolls. A method for producing a film, wherein the type A durometer hardness of at least one roll surface of the roll is 10 to 99.
<18> The film is the film according to any one of <8> to <11> or the anti-blocking film according to any one of <12> to <15>, <17>. The method for producing a film according to.

The present invention has made it possible to provide a resin composition, a film, and a method for producing a film, which can provide a transparent film having slidability and suppressed turbidity.

FIG. 1 is an example of a schematic cross-sectional view showing a layer structure of a transparent conductive film. FIG. 2A is a schematic view showing a state in which the smooth polycarbonate film is slid on the smooth polycarbonate film, and FIG. 2B is a schematic view showing a state in which the smooth polycarbonate film is slid on the polycarbonate film having fine irregularities on the surface. , A schematic diagram showing a state in which a polycarbonate film having fine irregularities on the surface is slid is shown. FIG. 3 shows an example of a schematic view of the film of the present invention as viewed from the cross-sectional direction. FIG. 4 is an example of a schematic diagram showing a method for producing a film of the present invention.

Hereinafter, the contents of the present invention will be described in detail. In addition, in this specification, "-" is used in the meaning that the numerical values described before and after it are included as the lower limit value and the upper limit value.
In the present specification, various physical property values and characteristic values shall be at 23 ° C. unless otherwise specified.

The resin composition of the present invention has an aromatic polycarbonate resin (A) having an ultimate viscosity of 0.37 dL / g or less, an aromatic polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less, and an aromatic polyarylate resin (B). The aromatic polyarylate resin (C) is contained in an amount of 0.60 dL / g or more, and the aromatic polyarylate is based on a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). It is characterized by containing 10 to 70 parts by mass of the resin (B).

With such a configuration, the film formed from the above resin composition (hereinafter, may be referred to as "the film of the present invention") has good slidability and turbidity is suppressed. It becomes a transparent film (with low haze). Further, the film of the present invention can have a high total light transmittance. That is, the protective film of a film manufactured by roll-to-roll such as a transparent conductive film is required to suppress adhesion between the films (anti-blocking property) from the viewpoint of improving the transportability of the film and preventing winding wrinkles. .. That is, the protective film is required to have slidability to the extent that the films do not stack with each other.
Hereinafter, the slidability of the film will be described with reference to FIG. FIG. 2A is a schematic view showing a state in which the smooth polycarbonate film is slid on the smooth polycarbonate film. When the smooth polycarbonate film is placed on the smooth polycarbonate film as described above, there is no slidability. In order to impart slidability to such a polycarbonate film, it is conceivable to provide fine irregularities on the surface of the film as shown in a schematic diagram in FIG. 2 (b). That is, if the surface of the film is provided with fine irregularities, the contact area between the films is reduced and sufficient slidability is achieved. In FIG. 2, 21 is a polycarbonate film having a smooth surface, and 22 is a polycarbonate film having fine irregularities on the surface.
As a means for providing fine irregularities on the surface of the film in this way, there are already known methods. For example, a method of forming fine irregularities on the surface of a film by using a roll having fine irregularities on the surface can be mentioned. In this method, a molten film is passed between rolls having fine irregularities on the surface to form fine irregularities. However, in the method using a roll having fine irregularities on the surface, the shape of the fine irregularities transferred to the film surface may change due to wear of the roll due to long-term use. Another method is to add fine particles to the film and use the fine particles to form fine irregularities on the surface of the film. However, in the method of adding fine particles, the transparency of the film may be impaired due to the difference in the refractive index between the fine particles and the resin.
Therefore, in the present invention, as a new method, it is decided to form fine irregularities on the surface of the film by polymer blending. Specifically, it is presumed to be due to the following mechanism.
That is, FIG. 3 is a schematic view of the film 30 of the present invention as viewed from the cross-sectional direction, and X mainly covers a region made of an aromatic polyarylate resin (C) having an intrinsic viscosity of 0.60 dL / g or more. , Y mainly indicate a region composed of a mixture of an aromatic polycarbonate resin (A) having an intrinsic viscosity of 0.37 dL / g or less and an aromatic polyarylate resin (B) having an intrinsic viscosity of 0.50 dL / g or less. ing. That is, in the film of the present invention, both the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (B) have a small ultimate viscosity and a small molecular weight, so that they are easily mixed with each other. On the other hand, since both the aromatic polyarylate resin (B) and the aromatic polyarylate resin (C) are polyarylate resins, they are also easily mixed. Then, by adjusting so that the aromatic polyarylate resin (B) is contained in an amount of 10 to 70 parts by mass with respect to a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). , Aromatic polyarylate resin (B) acts as a compatibilizer moderately, the resin components can be mixed without increasing the haze to the extent that it becomes a problem, and a sea-island structure can be formed, and slidability is achieved. It is presumed that.
Further, in the present invention, the composition comprises 10 to 70 parts by mass of the aromatic polyarylate resin (B) with respect to a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). This makes it possible to improve the heat resistance of the film.
Hereinafter, the present invention will be described in detail.

<Aromatic polycarbonate resin (A) with an ultimate viscosity of 0.37 dL / g or less>
The composition of the present invention contains an aromatic polycarbonate resin (A) having an ultimate viscosity of 0.37 dL / g or less. By using the aromatic polycarbonate resin having a low ultimate viscosity as described above, it is possible to easily mix with the aromatic polyarylate resin (B).
The ultimate viscosity of the aromatic polycarbonate resin (A) is preferably 0.35 dL / g or less, and more preferably 0.34 dL / g or less. By setting the value to the above upper limit or less, the slidability is more effectively exhibited when the film is produced. The lower limit of the ultimate viscosity of the aromatic polycarbonate resin (A) is not particularly defined, but is, for example, 0.10 dL / g or more, and further 0.20 dL / g or more, particularly 0.25 dL / g. It may be the above.
When the resin composition of the present invention contains two or more kinds of aromatic polycarbonate resins (A) having different ultimate viscosities, the ultimate viscosity of the aromatic polycarbonate resin (A) is the above two or more kinds of aromatic polycarbonate resins (A). It means the value of the ultimate viscosity of the aromatic polycarbonate resin mixed with A) (hereinafter, the weight average molecular weight and the glass transition temperature are also considered in the same manner, and the ultimate viscosity of other resin components and the like are also considered in the same manner. ).

The weight average molecular weight of the aromatic polycarbonate resin (A) is preferably 10,000 or more, more preferably 15,000 or more, and may be 20,000 or more. By setting the value to the lower limit or more, the heat resistance of the film tends to be improved, and the moldability and bending durability of the film tend to be further improved. The weight average molecular weight of the aromatic polycarbonate resin (A) is preferably 40,000 or less, more preferably 35,000 or less, and may be 30,000 or less. By setting the value to the upper limit or less, the compatibility with the aromatic polyarylate resin (B) tends to be further improved.
The weight average molecular weight of the aromatic polycarbonate resin (A) is measured according to the description of Examples described later.

The glass transition temperature (Tg) of the aromatic polycarbonate resin (A) is preferably 130 ° C. or higher, more preferably 135 ° C. or higher, and even more preferably 140 ° C. or higher. By setting the value to the above lower limit or more, the morphology of the protective film tends to be maintained more effectively even when the protective film is thermoformed.
The upper limit value is not particularly specified, but may be, for example, 170 ° C. or lower, and further may be 160 ° C. or lower.
The glass transition temperature (Tg) of the aromatic polycarbonate resin (A) is measured according to the description of Examples described later.

The aromatic polycarbonate resin (A) used in the present invention is preferably a bisphenol A type polycarbonate resin. The bisphenol A type polycarbonate resin refers to a resin having a carbonate constituent unit derived from bisphenol A and a derivative thereof, and preferably has a constituent unit represented by the following formula (A-1). * In the formula represents the connection position.

In formula (A-1), X ¹ represents the following structure.

Each of R ¹⁵ and R ¹⁶ is independently a hydrogen atom or an alkyl group, preferably at least one is a methyl group, and more preferably both are methyl groups.
The formula (A-1) is preferably represented by the following formula (A-2).

The content of the structural unit represented by the formula (A-1) in the aromatic polycarbonate resin (A) is preferably 70 mol% or more, preferably 80 mol% or more, of all the structural units excluding both ends. More preferably, it is more preferably 90 mol% or more. The upper limit value is not particularly limited, and 100 mol% may be a structural unit represented by the formula (A-1). Particularly preferably, the bisphenol A type polycarbonate resin is a resin in which substantially the entire amount excluding both ends is composed of the structural units of the formula (A-1). The substantially total amount here specifically means that it is 99.0 mol% or more of all the constituent units, preferably 99.5 mol% or more, and more preferably 99.9 mol% or more. ..
The aromatic polycarbonate resin (A) may have a structural unit other than the carbonate structural unit derived from bisphenol A and its derivative. Examples of the dihydroxy compound constituting such another structural unit include the aromatic dihydroxy compound described in paragraph 0014 of JP-A-2018-154819, and the contents thereof are incorporated in the present specification. ..

The method for producing the aromatic polycarbonate resin (A) is not particularly limited, and any method can be adopted. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, and a solid phase transesterification method of a prepolymer.

The resin composition of the present invention preferably contains the aromatic polycarbonate resin (A) in the resin composition in a proportion of 20% by mass or more, preferably 40% by mass or more, and more than 50% by mass. You may. Further, the resin composition of the present invention preferably contains the aromatic polycarbonate resin (A) in the resin composition in a proportion of 80% by mass or less, more preferably 70% by mass or less, and 65% by mass. It may be as follows.
Further, the resin composition of the present invention preferably contains the aromatic polycarbonate resin (A) in a proportion of 20% by mass or more, and may be 40% by mass or more, in the resin component contained in the resin composition. It may be more than 50% by mass. Further, the resin composition of the present invention preferably contains the aromatic polycarbonate resin (A) in a proportion of 80% by mass or less, more preferably 70% by mass or less, in the resin component contained in the resin composition. , 65% by mass or less.
Within the above range, the effects of the present invention tend to be exhibited more effectively.
The resin composition of the present invention may contain only one type of aromatic polycarbonate resin (A), or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.

<Aromatic polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less>
The resin composition of the present invention contains an aromatic polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less. Since such an aromatic polyarylate resin (B) tends to be compatible with the aromatic polycarbonate resin (A), it is possible to improve the heat resistance while increasing the transparency of the obtained film.
The ultimate viscosity of the aromatic polyarylate resin (B) is preferably 0.49 dL / g or less. The lower limit of the ultimate viscosity of the aromatic polyarylate resin (B) is not particularly specified, but may be, for example, 0.10 dL / g or more and 0.20 dL / g or more.
The ultimate viscosity of the aromatic polyarylate resin (B) is measured according to the description of Examples described later.

The weight average molecular weight of the aromatic polyarylate resin (B) is preferably 10,000 or more, more preferably 20,000 or more, and may be 30,000 or more. By setting the value to the lower limit or more, the heat resistance of the film tends to be improved, and the moldability and bending durability of the film tend to be further improved. The weight average molecular weight of the aromatic polyarylate resin (B) is preferably 100,000 or less, more preferably 60,000 or less, and may be 50,000 or less. By setting the value to the upper limit or less, the compatibility with the polycarbonate resin (A) tends to be further improved. The weight average molecular weight of the aromatic polyarylate resin (B) is measured according to the description of Examples described later.

The glass transition temperature (Tg) of the aromatic polyarylate resin (B) is preferably 170 ° C. or higher, more preferably 180 ° C. or higher, still more preferably 185 ° C. or higher, still more preferably 190 ° C. or higher. is there. By setting the value to the lower limit or more, the heat resistance of the obtained resin composition tends to be further improved. The upper limit value is, for example, 250 ° C. or lower, and may be 230 ° C. or lower or 210 ° C. or lower.
The glass transition temperature (Tg) of the aromatic polyarylate resin (B) is measured according to the description of Examples described later.

The aromatic polyarylate resin (B) used in the present invention contains a structural unit derived from an aromatic dicarboxylic acid (preferably an aromatic dicarboxylic acid containing isophthalic acid and / or terephthalic acid as a main component) and bisphenol (preferably bisphenol A). It is preferable that it is an aromatic polyester composed of a constituent unit derived from bisphenol) containing the above. The main component means a component having the highest content ratio, and preferably 90 mol% or more (hereinafter, the same applies to the main component).
Examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, benzophenonedicarboxylic acid, and 4,4'-diphenyldicarboxylic acid. Examples thereof include acids, 3,3'-diphenyldicarboxylic acid and 4,4'-diphenyletherdicarboxylic acid.
Examples of the bisphenol include 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, and 2,2-bis (4-hydroxy-3,). 5-dibromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane, 4,4'dihydroxydiphenylsulfone, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenylsulfide, 4,4'-Dihydroxydiphenylketone, 4,4'-dihydroxydiphenylmethane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,1 Examples thereof include -bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, and 2,2-bis (4-hydroxyphenyl) propane is preferable. These compounds may be used alone or in combination of two or more.

The method for producing the aromatic polyarylate resin (B) is not particularly limited, and those obtained by a known method can be used. The aromatic polyarylate resin (B) obtained by the interfacial polymerization method or the melt polymerization method can be preferably used.

The resin composition of the present invention preferably contains the aromatic polyarylate resin (B) in the resin composition in a proportion of 8% by mass or more, preferably 10% by mass or more, and 18% by mass or more. There may be. In particular, when the content is 18% by mass or more, the transparency of the film tends to be further improved. Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (B) in the resin composition in a proportion of 60% by mass or less, more preferably 55% by mass or less, and 47% by mass. It is more preferably less than or equal to%.
Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (B) in a proportion of 8% by mass or more in the resin component contained in the resin composition, and may be 10% by mass or more. , 18% by mass or more. Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (B) in a proportion of 60% by mass or less, and more preferably 55% by mass or less, in the resin component contained in the resin composition. It is preferably 47% by mass or less, and more preferably 47% by mass or less.
The resin composition of the present invention may contain only one type of aromatic polyarylate resin (B), or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.

<Aromatic polyarylate resin (C) with an ultimate viscosity of 0.60 dL / g or more>
The resin composition of the present invention contains an aromatic polyarylate resin (C) having an ultimate viscosity of 0.60 dL / g or more. Since such an aromatic polyarylate resin tends to be compatible with the aromatic polyarylate resin (B), it is possible to improve the heat resistance while increasing the transparency of the obtained film. In addition, since it is difficult to mix with the aromatic polycarbonate resin (A), it is presumed that the sea-island structure can be easily formed.
The ultimate viscosity of the aromatic polyarylate resin (C) is preferably 0.62 dL / g or more. The upper limit of the ultimate viscosity of the aromatic polyarylate resin (C) is not particularly specified, but may be, for example, 0.90 dL / g or less and 0.80 dL / g or less.
The ultimate viscosity of the aromatic polyarylate resin (C) is measured according to the description of Examples described later.

Further, in the present invention, the difference in the ultimate viscosities of the aromatic polycarbonate resin (A) and the aromatic polyarylate (C) is preferably 0.28 dL / g or more, and more preferably 0.30 dL / g or more. Preferably, it may be 0.33 dL / g or more. By setting the value to the lower limit or more, the slidability is more effectively exhibited in the produced film. The upper limit of the difference in the ultimate viscosity between the aromatic polycarbonate resin (A) and the aromatic polyarylate (C) is, for example, 0.50 dL / g or less, and further, 0.40 dL / g or less. it can.

The weight average molecular weight of the aromatic polyarylate resin (C) is preferably 10,000 or more, more preferably 30,000 or more, and may be 50,000 or more. By setting the value to the lower limit or more, the sea-island structure tends to be easily formed, and the slidability tends to be more easily imparted. The weight average molecular weight of the aromatic polyarylate resin (C) is preferably 150,000 or less, more preferably 100,000 or less, and may be 80,000 or less. By setting the value to the upper limit or less, the transparency and moldability of the film tend to be further improved.
The weight average molecular weight of the aromatic polyarylate resin (C) is measured according to the description of Examples described later.

The glass transition temperature (Tg) of the aromatic polyarylate resin (C) is preferably more than 185 ° C, more preferably 190 ° C or higher, and even more preferably 195 ° C or higher. By setting the Tg to more than 185 ° C., the heat resistance of the obtained resin composition or film can be further improved. The upper limit may be, for example, 270 ° C. or lower, and further may be 250 ° C. or lower and 230 ° C. or lower.
The glass transition temperature (Tg) of the aromatic polyarylate resin (C) is measured according to the description of Examples described later.

The aromatic polyarylate resin (C) used in the present invention contains a structural unit derived from an aromatic dicarboxylic acid (preferably an aromatic dicarboxylic acid containing isophthalic acid and / or terephthalic acid as a main component) and bisphenol (preferably bisphenol A). It is preferable that it is an aromatic polyester composed of a constituent unit derived from bisphenol) containing the above.
Examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, benzophenonedicarboxylic acid, and 4,4'-diphenyldicarboxylic acid. , 3,3'-diphenyldicarboxylic acid, 4,4'-diphenyletherdicarboxylic acid and the like.
Examples of the bisphenol include 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, and 2,2-bis (4-hydroxy-3,). 5-dibromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane, 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenylsulfide , 4,4'-Dihydroxydiphenylketone, 4,4'-dihydroxydiphenylmethane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1, Examples thereof include 1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, and 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane is preferable. These compounds may be used alone or in combination of two or more.

The method for producing the aromatic polyarylate resin (C) is not particularly limited, and those obtained by a known method can be used. The aromatic polyarylate resin (C) obtained by the interfacial polymerization method or the melt polymerization method can be preferably used.

The resin composition of the present invention preferably contains the aromatic polyarylate resin (C) in the resin composition in a proportion of 10% by mass or more, and may be 12% by mass or more. Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (C) in the resin composition in a proportion of 40% by mass or less, more preferably 35% by mass or less, and 28% by mass. It may be less than or equal to%.
Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (C) in a proportion of 10% by mass or more, and may be 12% by mass or more, in the resin component contained in the resin composition. .. Further, the resin composition of the present invention preferably contains the aromatic polyarylate resin (C) in a proportion of 40% by mass or less, and more preferably 35% by mass or less, in the resin component contained in the resin composition. Preferably, it may be 28% by mass or less.
The resin composition of the present invention may contain only one type of aromatic polyarylate resin (C), or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.

<Resin blend ratio>
The resin composition of the present invention contains 10 to 70 parts by mass of the aromatic polyarylate resin (B) with respect to a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). It is preferable that the aromatic polyarylate resin (B) is contained in an amount of 10 to 60 parts by mass with respect to a total of 40 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C). It is more preferable that the aromatic polyarylate resin (B) is contained in an amount of 10 to 50 parts by mass with respect to a total of 50 to 90 parts by mass of the aromatic polyarylate resin (C) and the aromatic polycarbonate resin (A). It is more preferable to contain 10 to 40 parts by mass of the aromatic polyarylate resin (B) with respect to a total of 60 to 90 parts by mass of the group polyarylate resin (C), and the aromatic polycarbonate resin (A) and the aromatic polyarylate resin are more preferably contained. It is even more preferable to contain 10 to 35 parts by mass of the aromatic polyarylate resin (B) with respect to a total of 65 to 90 parts by mass of (C). In particular, when the total of the aromatic polycarbonate resin (A), the aromatic polyarylate resin (B) and the aromatic polyarylate resin (C) is 100 parts by mass, it is preferable to satisfy the above blending ratio.
Further, in the resin composition of the present invention, the mass ratio of the aromatic polyarylate resin (B) to the aromatic polyarylate resin (C) is preferably 3: 1 to 1: 3, and is 2.5: 1. It is more preferably ~ 1: 2.5. With such a configuration, the effect of the present invention tends to be exhibited more effectively.
Further, in the resin composition of the present invention, the total of the aromatic polycarbonate resin (A), the aromatic polyarylate resin (B) and the aromatic polyarylate resin (C) accounts for 95% by mass or more of the resin composition. It is preferable to occupy 98% by mass or more.

<Other ingredients>
The resin composition of the present invention is, in addition to the above-mentioned aromatic polycarbonate resin (A), aromatic polyarylate resin (B) and aromatic polyarylate resin (C), an antioxidant as long as the gist of the present invention is not deviated. It may contain other components such as (E), transesterification inhibitor (F), and mold release agent (G).

<< Antioxidant (E) >>
The resin composition of the present invention preferably contains an antioxidant.
Examples of the antioxidant include a phenol-based antioxidant, an amine-based antioxidant, a phosphorus-based antioxidant, a thioether-based antioxidant, and the like, and a phosphorus-based antioxidant and a phenol-based antioxidant (more preferably hinder). At least one of (dophenol-based antioxidants) is preferable, and phosphorus-based antioxidants are particularly preferable.
As the phosphorus-based antioxidant, a phosphite compound represented by the following formula (1) or (2) is preferable.

(In the formula (1), R ¹ and R ² independently represent an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms.)

(In the formula (2), R ³ to R ⁷ independently represent a hydrogen atom, an aryl group having 6 to 20 carbon atoms, or an alkyl group having 1 to 20 carbon atoms.)

In the above formula (1), the ^{alkyl groups represented by R 1} and R ² are preferably linear or branched alkyl groups having 1 to 10 carbon atoms, respectively. When R ¹ and R ² are aryl groups, an aryl group represented by any of the following general formulas (1-a), (1-b), or (1-c) is preferable.

(In the formula (1-a), ^{R A} is independently, in. The formula (1-b) represents an alkyl group having a carbon number of 1 to 10, ^{R B} are each independently, carbon atoms of 1 to Represents 10 alkyl groups.)

Examples of the phenolic antioxidant include hindered phenolic antioxidants. As the phenolic antioxidant, the phenolic antioxidant described in paragraph 0041 of JP-A-2019-002023 and the phenol-based antioxidant described in paragraphs 0033 to 0034 of JP-A-2019-0506035 are preferably used. These contents are incorporated herein by reference.
In addition, the details of the antioxidant can be referred to in paragraphs 0057 to 0061 of JP-A-2017-031313, and these contents are incorporated in the present specification.

When contained, the content of the antioxidant in the resin composition is preferably 0.005 parts by mass or more, more preferably 0.007 parts by mass, based on 100 parts by mass of the resin component contained in the resin composition. It is by mass or more, more preferably 0.01 parts by mass or more. The upper limit of the content of the antioxidant is preferably 4 parts by mass or less, more preferably 1 part by mass or less, and further preferably 0.5 parts by mass with respect to 100 parts by mass of the resin component contained in the resin composition. Parts or less, more preferably 0.1 parts by mass or less.
By setting the content of the antioxidant to 0.005 parts by mass or more, the transparency of the film tends to be further improved. Further, by setting the content of the antioxidant to 4 parts by mass or less, the moist heat stability of the film tends to be improved.
Only one type of antioxidant may be used, or two or more types may be used. When two or more types are used, the total amount is preferably in the above range.

<< Transesterification inhibitor (F) >>
The resin composition of the present invention preferably contains a transesterification inhibitor.
Examples of the transesterification inhibitor include a phosphorus-based transesterification inhibitor and a sulfur-based transesterification inhibitor.
As the transesterification inhibitor, the descriptions in paragraphs 0035 to 0039 of International Publication No. 2015/190162, paragraphs 0037 of JP-A-2019-002023, and paragraphs 0041 of JP-A-2018-199745 can be referred to. Is incorporated herein.

When contained, the content of the transesterification inhibitor (F) in the resin composition is preferably 0.001 part by mass or more, more preferably 0.001 part by mass or more, based on 100 parts by mass of the resin component contained in the resin composition. It is 0.005 parts by mass or more, more preferably 0.007 parts by mass or more. The upper limit of the content of the ester exchange inhibitor is preferably 1.0 part by mass or less, more preferably 0.5 part by mass or less, still more preferably, with respect to 100 parts by mass of the resin component contained in the resin composition. Is 0.3 parts by mass or less, more preferably 0.1 parts by mass or less.
Only one type of transesterification inhibitor may be contained, or two or more types may be contained. When two or more types are included, the total amount is preferably in the above range.

<< Release Agent (G) >>
The resin composition of the present invention preferably contains a mold release agent.
The release agent is at least one selected from the group consisting of an aliphatic carboxylic acid, an ester of an aliphatic carboxylic acid and an alcohol, an aliphatic hydrocarbon compound having a number average molecular weight of 200 to 15,000, and a polysiloxane-based silicone oil. Species of compounds can be mentioned, preferably esters of aliphatic carboxylic acids and alcohols.
Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (mixture containing myricyl palmitate as the main component), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, and glycerin monostearate. , Glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.
In addition, as the release agent, the release agent described in paragraph 0032 of JP-A-2017-226848 and paragraph 0056 of JP-A-2018-199745 can be used, and the contents thereof are incorporated in the present specification. Is done.

When contained, the content of the release agent in the resin composition is preferably 0.001 part by mass or more, more preferably 0.005 part by mass or more, based on 100 parts by mass of the resin component contained in the resin composition. It is preferably 2 parts by mass or less, more preferably 1 part by mass or less, and further preferably 0.5 part by mass or less.
Only one type of release agent may be used, or two or more types may be used. When two or more types are used, the total amount is preferably in the above range.

<< Other ingredients >>
In addition to the above components (A) to (G), the resin composition of the present invention contains other thermoplastic resins, heat stabilizers, flame retardants, flame retardants, ultraviolet absorbers, colorants, antistatic agents, and the like. It may contain a fluorescent whitening agent, an antifogging agent, a fluidity improving agent, a plasticizer, a dispersant, an antibacterial agent, an antiblocking agent, an impact improving agent, a sliding improving agent, a hue improving agent, an acid trapping agent and the like. .. These components may be used alone or in combination of two or more.
When contained, the total amount of the components other than the above (A) to (G) is preferably 0.001 to 5% by mass, and preferably 0.001 to 2% by mass. More preferably, it is 0.01 to 1% by mass.

<Characteristics of resin composition>
In the resin composition of the present invention, at least one of the glass transition temperature or a plurality of glass transition temperatures measured by a differential scanning calorimeter preferably exhibits 150 ° C. or higher, and more preferably at least one exhibits 160 ° C. or higher. Further, it is preferable that either the glass transition temperature or the plurality of glass transition temperatures measured by the differential scanning calorimeter is 140 ° C. or higher. The upper limit of the glass transition temperature is not particularly defined, but it is practical that, for example, either the glass transition temperature or the plurality of glass transition temperatures is 200 ° C. or lower, more preferably 180 ° C. or lower.
The glass transition temperature is measured according to the description of Examples described later.

<Film manufacturing method>
The film manufacturing method of the present invention is a film manufacturing method in which the resin composition of the present invention is extruded into a sheet in a molten state and pressure-bonded with a pair of rolls, and at least one of the pair of rolls The roll surface is characterized by having a type A durometer hardness of 10 to 99.
With such a configuration, the aromatic polyarylate resin (B) acts as a compatibilizer to the aromatic polycarbonate resin (A) and the polyarylate resin (C) moderately, and haze becomes a problem. It is presumed that the resin components can be mixed and the sea-island structure can be formed without increasing the height, and the slidability of the film can be achieved.
Hereinafter, the details of the production method of the present invention will be described.
FIG. 4 is an example of a partial schematic view showing a method for producing a film of the present invention. In the production method of the present invention, for example, as shown in FIG. 4, the composition 41 of the present invention is extruded from a die 42 in a molten state into a sheet. The melted and sheet-like composition 41 is pressure-bonded by the pair of rolls when it is passed between the pair of rolls (the first roll 43a and the second roll 43b). At this time, for at least one of the first roll 43a and the second roll 43b, it is preferable to use a roll having a type A durometer hardness of 10 to 99 on the roll surface. In FIG. 4, the first roll 43a is a roll having a surface durometer hardness of 10 to 99. That is, as the first roll 43a, a roll having a soft surface is used. By using a roll having a surface durometer hardness of 10 to 99, the portion of the aromatic polyarylate resin (C) and the aromatic polycarbonate resin (A) that are incompatible with the aromatic polyarylate resin (B) is formed of the film. It is presumed that it appears on the surface and forms fine irregularities on the surface of the film. As a result, slidability can be achieved. The durometer hardness of the roll surface is preferably 30 or more, more preferably 50 or more, preferably 80 or less, and more preferably 75 or less. By setting it in such a range, the roll has an appropriate softness. Examples of rolls having a surface durometer hardness of 10 to 99 include mirrored rubber rolls.
The temperature of the roll having a surface durometer hardness of 10 to 99 is preferably 30 to 90 ° C, more preferably 40 to 70 ° C.

In FIG. 4, the composition 41 passes between the pair of rolls (first roll 43a and second roll 43b) and then further passes over the transport roll 44.
Rolls other than rolls having a surface durometer hardness of 10 to 99, for example, in FIG. 4, examples of the second roll 43b and the transport roll 44 include metal rolls. Metal rolls reach a durometer hardness of 100, which is the measurement limit. Examples of the metal roll include a mirror rigid body roll and a metal elastic roll. The surface temperature of rolls other than rolls having a surface durometer hardness of 10 to 99 is preferably 70 to 170 ° C, more preferably 100 to 160 ° C.

In the present invention, the durometer hardness of at least one roll surface of the first roll and the second roll may be in the above range, but the surfaces of both the first roll and the second roll may satisfy the above durometer hardness. .. In this case, desired fine irregularities are formed on both surfaces of the film.

The film after passing between the pair of rolls (first roll 43a and second roll 43b) is cooled while passing through the transport roll 44, or by passing through a cooling zone or a cooling roll. .. After cooling, it may be further wound around a core material. That is, in the present invention, it can be a wound body having the core material and the film of the present invention wound around the core material.
The film obtained by the above film manufacturing method preferably has a film thickness of 10 μm or more and 300 μm or less. In addition, the details of the film obtained by the method for producing the film of the present invention are the same as those of the above-mentioned film of the present invention.
Further, a transparent conductive film can also be produced by laminating the film of the present invention obtained above, the pressure-sensitive adhesive layer, the film base material, and the electrode layer.

<Film characteristics>
The thickness of the film of the present invention is preferably 10 μm or more and 300 μm or less. By setting the thickness within the above range, a more transparent film can be obtained.
The thickness of the film of the present invention is preferably 20 μm or more, and may be 25 μm or more. Further, it is preferably 250 μm or less, more preferably 200 μm or less, and further preferably 150 μm or less.

The film of the present invention also preferably has a coefficient of kinetic friction with a film having a root mean square roughness of 0.093 μm of 2.00 or less, more preferably 1.80 or less. It is more preferably 50 or less, and may be 1.33 or less. The lower limit is, for example, 0.86 or more, and may be 0.90 or more.
The coefficient of kinetic friction is a value measured under the conditions of a thread of 100 mm / min and a load cell of 10N, and more specifically, it is measured by the method described in Examples described later.

In the film of the present invention, the total light transmittance under the condition of a D65 light source 10 ° field of view is preferably 80% or more, more preferably 85% or more, and further preferably 88% or more. Ideally, the upper limit of the total light transmittance is 100%, but even if it is 94% or less, the required performance is sufficiently satisfied.
The total light transmittance is measured by the method described in Examples described later.

The haze of the film of the present invention is preferably 10% or less, more preferably 8% or less, further preferably 6% or less, and further 5% or less and 4% or less. .. The ideal lower limit is 0%, but even if it is 0.1% or more, it is a practical level.
Haze is measured by the method described in Examples described below.

<Use>
The film of the present invention is preferably used as a masking film. More preferably, it is used as an anti-blocking film. It is also preferably used as a protective film for transparent conductive films. In particular, the film of the present invention and a multilayer body having an adhesive layer, a base material and an electrode layer in this order are preferably used as a transparent conductive film.
Further, the transparent conductive film is preferably used as a transparent conductive film used for a film sensor of a touch panel, an electronic paper, a dye-sensitized solar cell, a touch sensor, and the like.
In addition to the above, the film of the present invention is preferably used as a film for applications that require slidability and transparency.

The present invention will be described in more detail with reference to examples below. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.

<Raw materials>
-Polycarbonate resin (A)
(A1) Aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material, manufactured by Mitsubishi Engineering Plastics, H-7000F, weight average molecular weight: 24,900, ultimate viscosity 0.30 dL / g, Tg: 141 ° C
(A2) Aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material, manufactured by Mitsubishi Engineering Plastics, H-4000F, weight average molecular weight: 29,200, ultimate viscosity 0.35 dL / g, Tg: 143 ° C
-Polycarbonate resin (A') (for comparison)
(A3) Aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material, manufactured by Mitsubishi Engineering Plastics, S-3000F, weight average molecular weight: 41,300, ultimate viscosity 0.43 dL / g, Tg: 148 ° C

-Polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less
(B) Unitika Ltd., U-powder L type, weight average molecular weight 40,800, ultimate viscosity 0.48 dL / g, Tg: 195 ° C.

-Polyarylate resin (C) with an ultimate viscosity of 0.60 dL / g or more
(C) Unitika Ltd., U-powder D type, weight average molecular weight 63,000, ultimate viscosity 0.65 dL / g, Tg: 201 ° C.

-Alloy (D) of polyarylate resin (B) and polyarylate resin (C)
(D) Unitika Ltd., U-100, weight average molecular weight 46,000, ultimate viscosity 0.55 dL / g, Tg: 195 ° C., mass ratio of U-powder L type and U-powder D type is 2: 1. pellet

・ Antioxidant (E)
(E) Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, phosphorus-based antioxidant, ADEKA, ADEKA STAB PEP-36

・ Transesterification inhibitor (F)
(F) Octadecyl phosphate, manufactured by ADEKA, AX-71

・ Release agent (G)
(G) Glycerin monostearate, manufactured by RIKEN Vitamin, Rikemar S-100A

<Measurement method of weight average molecular weight>
The weight average molecular weight (Mw) of each resin was measured by gel permeation chromatography.
Specifically, an LC-20AD system (manufactured by Shimadzu Corporation) was used as a gel permeation chromatography apparatus, and LF-804 (manufactured by Shodex) was connected and used as a column. The column temperature was 40 ° C. The detector used was an RI detector of RID-10A (manufactured by Shimadzu Corporation). Chloroform was used as the eluent, and the calibration curve was prepared using standard polystyrene manufactured by Tosoh Corporation.
If the gel permeation chromatography device, column, or detector is difficult to obtain, measure using another device having equivalent performance.

<Measurement method of extreme viscosity>
The ultimate viscosity [η] (unit: dL / g) of the resin was measured using methylene chloride as a solvent. The measurement temperature was 25 ° C. _{The specific viscosity [η sp} ] at each solution concentration [C] (g / dL) was measured with an Ubbelohde viscometer. The ultimate viscosity was calculated from the obtained specific viscosity values and concentrations by the following formula.

<Measurement of glass transition temperature (Tg)>
The glass transition temperature (Tg) of various resins and resin compositions (pellets) is raised and lowered in two cycles according to the measurement conditions of the differential scanning calorimeter (DSC) below, and at the time of the second cycle of raising the temperature. The glass transition temperature of the glass was measured.
The intersection of the straight line extending the baseline on the low temperature side to the high temperature side and the tangent of the turning point is the starting glass transition temperature, and the intersection of the straight line extending the baseline on the high temperature side to the low temperature side and the tangent of the turning point is The end glass transition temperature was defined, and the intermediate point between the start glass transition temperature and the end glass transition temperature was defined as the glass transition temperature (Tg). The measurement start temperature was 30 ° C., the temperature rising rate was 10 ° C./min, the reached temperature was 250 ° C., and the temperature lowering rate was 20 ° C./min.
As a measuring device, a differential scanning calorimeter (DSC, manufactured by Hitachi High-Tech Science Corporation, "DSC7020") was used.

Examples 1-8, Comparative Examples 1-7
<Manufacturing of resin composition (pellet)>
Each of the above components A to G was weighed so as to have the content shown in Table 1 or Table 2 (the content of each component is a part by mass). Then, after mixing with a tumbler for 15 minutes, melt-kneading was performed at a cylinder temperature of 300 ° C. by a twin-screw extruder with a vent having a screw diameter of 32 mm (“TEX30α” manufactured by Japan Steel Works, Ltd.), and pellets were obtained by strand cutting.

<Manufacturing of film>
Using the obtained pellets, a film was produced by the following method.
The pellets obtained above were subjected to a T-die melt extruder consisting of a twin-screw extruder (manufactured by Japan Steel Works, Ltd., "TEX30α") with a barrel diameter of 32 mm and a screw L / D = 31.5. Under the conditions of a discharge rate of 10 kg / h and a screw rotation speed of 63 rpm, the film was extruded in a molten state, crimped with a first roll and a second roll, and then cooled and solidified to prepare a film. The cylinder / die head temperature was 280 ° C.
The final film thickness was adjusted by changing the roll speeds of the first roll and the second roll so as to have the values shown in Table 1 or Table 2.

Details of the first roll and the second roll used are as follows.
-First roll: Silicone rubber roll (IT68S-MCG) manufactured by Mochida Shoko Co., Ltd.
Dimensional diameter: Outer diameter 260 mm x width 600 mm
Durometer hardness of roll surface (type A type): 70
Roll temperature: 50 ° C
-Second roll: JSW, metal rigid body roll (surface: hard chrome treatment)
Core metal diameter: outer diameter 250 mm x width 600 mm
Durometer hardness of roll surface (type A type): The measurement limit of 100 has been reached.
Roll temperature: 130 ° C

<Measurement of total light transmittance and haze>
Using a haze meter, the total light transmittance (%) and haze (%) of the obtained film were measured under the condition of a D65 light source 10 ° field of view.
As the haze meter, "HM-150" manufactured by Murakami Color Technology Research Institute Co., Ltd. was used.

<Measurement of dynamic friction coefficient>
The dynamic friction coefficient of the obtained film was measured using a friction coefficient measuring machine. Specifically, the film having a root mean square roughness of 0.093 μm and the film obtained above were placed so as to overlap each other, and the thread was set at 100 mm / min and the load cell was 10N. The obtained film was slid on a film of .093 μm, and the dynamic friction coefficient was measured.
A friction coefficient measuring machine manufactured by Toyo Seiki Seisakusho Co., Ltd. (“friction tester”) was used.
As a film having a root mean square roughness of 0.093 μm, a bisphenol A type polycarbonate film with a single-sided masking film (manufactured by Mitsubishi Gas Chemical Company, FE-2000, thickness 100 μm) was used. In this embodiment, the unmasked side of the bisphenol A type polycarbonate film with a single-sided masking film is turned to the upper surface, and fixed to the right end of the test table with tape so that the long axis coincides with the long axis of the test table, 63 mm × The obtained film was attached to the underside of a 63 mm, 200 g thread, and the polycarbonate film and the obtained film were placed so as to overlap each other. As described above, the obtained film was slid and the dynamic friction coefficient was measured.
In Table 1 or 2, "x" means unmeasurable.

<Measurement of root mean square roughness Rq>
The surface roughness of the film having a root mean square roughness of 0.093 μm used for measuring the dynamic friction coefficient was specifically measured by the following method using a surface roughness measuring machine. The detector of the device was made "integrated", and a "standard drive unit" was attached to the drive unit of the detector. The film was fixed on a glass plate with tape, and the surface roughness measuring machine was installed on it so as not to move. Then, the measurement was performed under the standard "JIS B 0601-2001", the measurement speed was 0.5 mm / s, the cutoff value was 0.8, and the number of sections was 3, and the root mean square roughness Rq was measured. The root mean square roughness Rq was measured three times at different locations of the film and used as the average value.
As the measuring machine, "SJ-210" manufactured by Mitutoyo Co., Ltd. was used.

The results are shown in Tables 1 and 2 below.

10 Transparent conductive film 11 Electrode layer (transparent conductive film)
12 Base material 13 Adhesive layer 14 Protective film 21 Polycarbonate film with smooth surface 22 Polycarbonate film with fine irregularities on the surface 30 Film 41 Composition 42

Dice

43a, 43b Roll 44 Transport roll

Claims

Aromatic polycarbonate resin (A) with an ultimate viscosity of 0.37 dL / g or less,
Aromatic polyarylate resin (B) having an ultimate viscosity of 0.50 dL / g or less,
Contains an aromatic polyarylate resin (C) having an ultimate viscosity of 0.60 dL / g or more.
A resin composition containing 10 to 70 parts by mass of the aromatic polyarylate resin (B) with respect to a total of 30 to 90 parts by mass of the aromatic polycarbonate resin (A) and the aromatic polyarylate resin (C).
The resin composition according to claim 1, wherein the aromatic polycarbonate resin (A) has an ultimate viscosity of 0.34 dL / g or less.
The resin composition according to claim 1 or 2, wherein the difference in the ultimate viscosity between the aromatic polycarbonate resin (A) and the aromatic polyarylate (C) is 0.28 dL / g or more.
The resin composition according to any one of claims 1 to 3, wherein at least one of the glass transition temperature or the plurality of glass transition temperatures measured by a differential scanning calorimeter of the resin composition is 150 ° C. or higher.
The resin composition according to any one of claims 1 to 4, further comprising an antioxidant (E).
The resin composition according to any one of claims 1 to 5, further comprising a transesterification inhibitor (F).
The resin composition according to any one of claims 1 to 6, further comprising a mold release agent (G).
A film formed from the resin composition according to any one of claims 1 to 7.
The film according to claim 8, wherein the dynamic friction coefficient measured under the conditions of a thread of 100 mm / min and a load cell of 10 N, which is measured with a film having a root mean square roughness of 0.093 μm, is 2.00 or less.
The film according to claim 8 or 9, wherein the film thickness is 10 μm or more and 300 μm or less.
The film according to any one of claims 8 to 10, wherein the haze is 10% or less.
An anti-blocking film formed from the resin composition according to any one of claims 1 to 7.
The anti-blocking according to claim 12, wherein the dynamic friction coefficient measured under the conditions of a thread of 100 mm / min and a load cell of 10 N measured with a film having a root mean square roughness of 0.093 μm is 2.00 or less. the film.
The anti-blocking film according to claim 12 or 13, wherein the film thickness is 10 μm or more and 300 μm or less.
The anti-blocking film according to any one of claims 12 to 14, wherein the haze is 10% or less.
The film according to any one of claims 8 to 11, or the anti-blocking film according to any one of claims 12 to 15.
Adhesive layer and
With the base material
A transparent conductive film having an electrode layer in this order.
A method for producing a film produced by extruding the resin composition according to any one of claims 1 to 7 into a sheet in a molten state and pressure-bonding the resin composition with a pair of rolls, wherein at least one of the pair of rolls is used. A method for producing a film, wherein the type A durometer hardness of one roll surface is 10 to 99.
The method for producing a film according to claim 17, wherein the film is the film according to any one of claims 8 to 11 or the anti-blocking film according to any one of claims 12 to 15. ..