JP2007237555A - Method for producing antistatic film and antistatic film - Google Patents

Method for producing antistatic film and antistatic film Download PDF

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JP2007237555A
JP2007237555A JP2006063125A JP2006063125A JP2007237555A JP 2007237555 A JP2007237555 A JP 2007237555A JP 2006063125 A JP2006063125 A JP 2006063125A JP 2006063125 A JP2006063125 A JP 2006063125A JP 2007237555 A JP2007237555 A JP 2007237555A
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antistatic
resin
layer
film
antistatic film
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Hideaki Kumazawa
Takeshi Matsumura
Koichi Washimi
Daisuke Yamazaki
大輔 山崎
武 松村
英明 熊沢
浩一 鷲見
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Jsr Corp
Jsr株式会社
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Abstract

The present invention provides a method for producing an antistatic film which can be produced by a simple method, has excellent optical properties and antistatic properties, and has high bondability between layers, and an antistatic film obtained by the method.
A method for producing an antistatic film having two or more resin layers, wherein each of the resin layers contains a cyclic olefin-based resin, and the resin layer forming at least one surface layer is an antistatic film. A method for producing an antistatic film, comprising: an antistatic layer containing an agent, wherein a cyclic olefin-based resin forming each layer is simultaneously melt-extruded using a T-die and laminated in a molten state.
[Selection] Figure 1

Description

  The present invention relates to a method for producing an antistatic film obtained by laminating two or more resin layers, and an antistatic film obtained by the method.

  In various display elements such as liquid crystal display elements, electroluminescence display elements, and flat displays such as plasma light emitting display elements, the circuit is destroyed by static electricity generated when the protective film for protecting the display surface during transportation is peeled off. Problems can cause dust to adhere to the surface due to static electricity.Furthermore, when the dust is wiped with a cloth, etc., further static electricity is generated, causing problems such as circuit damage or damage to the display surface due to wiping. Prevention is required. Further, prevention of charging is also required for optical components other than display elements.

  For example, Patent Document 1 discloses a surface of a transparent resin film serving as a base material in order to solve the problem that an antireflection film used in the field of electronic equipment is easily charged and is easily attracted by electrostatically adsorbing dust and the like. It is proposed to provide a transparent layer (A) having a higher refractive index than that of the base film, and further to provide a layer (B) having transparency and conductivity. Although this method is effective for preventing charging, it is necessary to sequentially produce the layer (A) and the layer (B) after producing the base film, and the process is complicated.

  As a method for producing a laminated film in which an antistatic layer is formed on the surface of the optical film, the antistatic layer forming resin solution is applied to the surface of the optical film and dried, as employed in the method of Patent Document 1. The method of forming is mentioned by doing. However, when the material on the surface of the optical film on which the antistatic layer is laminated is formed of a material that is inferior in organic solvent resistance, in the coating with the antistatic layer forming resin solution, the optical film that becomes the base material by the organic solvent is It may deteriorate or deteriorate and adversely affect the optical characteristics.

  As a solution to such problems, a method of forming an antistatic layer by applying and drying on an optical film using an aqueous solution or aqueous dispersion containing a water-soluble or water-dispersible conductive polymer has been proposed. (Patent Document 2). In this method, the problem that the optical film serving as the base material is altered by the organic solvent is solved, but after the base film is manufactured, the process is complicated because an antistatic layer is formed on the film. there were.

  On the other hand, in the method of forming an antistatic film alone and pasting it together with an optical film as a base material with an adhesive, or bonding by heat fusion or pressure bonding, the antistatic film to be bonded needs to have a certain thickness Therefore, there is a problem that transparency is lowered by the antistatic agent contained in the antistatic film.

Therefore, there has been a demand for a method for producing an antistatic film that can be efficiently produced by a simple method and that has excellent transparency and antistatic effect, and the appearance of an antistatic film.
JP2003-300288A JP 2004-338379 A

Conventional antistatic films have problems such as complicated manufacturing methods, insufficient transparency, and insufficient bonding properties between layers.
The present invention solves these problems, and provides a method for producing an antistatic film that can be produced by a simple method, has excellent optical properties and antistatic properties, and has high bondability between layers, and an antistatic film obtained by the method. The purpose is that.

  The present inventors examined the above problems, and among the methods for producing an antistatic film having two or more resin layers, two or more specific resin layers were simultaneously melt-extruded using a T-die, The method for producing an antistatic film characterized by laminating in a molten state was found to be easy to produce, excellent in optical properties and antistatic properties, and high in bondability of each layer, and completed the present invention. .

That is, the present invention
A method for producing an antistatic film having two or more resin layers, wherein each of the resin layers contains a cyclic olefin resin, and the resin layer forming at least one surface layer contains an antistatic agent. A method for producing an antistatic film, which is a prevention layer, wherein a cyclic olefin-based resin forming each layer is simultaneously melt-extruded using a T-die and laminated in a molten state.

In the method for producing the antistatic film, it is preferable that the antistatic film is laminated in a molten state and then pressed using a pressure roller.
The present invention includes an antistatic film obtained by the above method.

The antistatic film preferably has an antistatic layer having a thickness of 1 to 100 μm.
The antistatic film preferably has an antistatic layer having antistatic properties formed on at least one surface of a base material layer that is a transparent resin layer.

  According to the present invention, there are provided a method for producing an antistatic film comprising two or more resin layers and an antistatic film that can be produced by a simple method, have excellent optical properties and antistatic properties, and have high bondability between layers. be able to.

Hereinafter, the present invention will be specifically described.
≪Method for producing antistatic film≫
In the method for producing an antistatic film of the present invention, a resin for forming each layer of the antistatic film is melt-extruded at the same time using a T-die, and each layer is laminated in a molten state, thereby comprising two or more resin layers. A laminate is produced.

<Raw material for each resin layer>
In the method for producing an antistatic film of the present invention, a cyclic olefin resin or a cyclic olefin resin composition (hereinafter also simply referred to as a cyclic olefin resin) is used as a raw material for each resin layer. The cyclic olefin-based resin used in the production method of the present invention has thermoplasticity, and has birefringence due to molecular orientation when the molecules are oriented compared to other thermoplastic transparent resins such as polycarbonate and polystyrene. Is unlikely to occur. Moreover, since it is excellent also in transparency, heat resistance, chemical resistance, etc., it is useful for various uses in the optical field, and is used as a resin constituting the antistatic film according to the present invention.

Cyclic olefin-based resin The cyclic olefin-based resin used in the present invention is a polymer or copolymer obtained from a monomer represented by the following general formula (1) (hereinafter also referred to as “specific monomer”). Merger (hereinafter “(both)
"Polymer". ), More preferably a (co) polymer having a structural unit represented by the following general formula (1 ′), particularly preferably a structural unit represented by the following general formula (2) ( Co) polymer.

(In Formula (1), R < 1 > -R < 4 > is a hydrogen atom, a halogen atom, a C1-C30 hydrocarbon group, or another monovalent organic group, and may be the same or different. Further, any two of R 1 to R 4 may be bonded to each other to form a monocyclic or polycyclic structure, m is 0 or a positive integer, and p is 0 or a positive integer. .)

(In formula (1 ′), the definitions of R 1 to R 4 , p, and m are the same as in formula (1) above.)

(In formula (2), the definitions of R 1 to R 4 are the same as in formula (1) above.)
Specifically, the polymers or copolymers shown in the following (a) to (e) can be preferably used.
(A) Ring-opening polymer of specific monomer (hereinafter also referred to as “specific ring-opening polymer”)
(B) a ring-opening copolymer (hereinafter, referred to as “copolymerizable cyclic monomer”), which is a specific monomer and a cyclic monomer copolymerizable with the specific monomer (hereinafter, also referred to as “copolymerizable cyclic monomer”). , Also referred to as “specific ring-opening copolymer”.)
(C) Saturated copolymer of specific monomer and unsaturated double bond-containing compound (hereinafter also referred to as “specific saturated copolymer”)
(D) Hydrogenated (co) polymer (e) specific ring-opening polymer or specific ring-opening copolymer (hereinafter also referred to as “specific ring-opening (co) polymer”) Hydrogenated (co) polymer obtained by cyclization of ring-opening (co) polymer by Friedel-Craft reaction and hydrogenation [specific monomer]
As a preferable specific monomer, in the above formula (1), R 1 and R 3 are a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and R 2 and R 4 are a hydrogen atom or a monovalent organic group. And at least one of R 2 and R 4 represents a polar group other than a hydrogen atom and a hydrocarbon group, m is an integer of 0 to 3, p is an integer of 0 to 3, and the value of m + p is 0. -4, more preferably 0-2, particularly preferably 1.

Among the specific monomers, the specific monomer in which R 2 and R 4 have a polar group represented by the following formula (3) has a high glass transition temperature (hereinafter also referred to as “Tg”), and moisture absorption. It is preferable at the point from which low cyclic olefin type thermoplastic resin is obtained.

- (CH 2) n COOR 5 (3)
(Wherein, R 5 represents a hydrocarbon group having 1 to 12 carbon atoms, n is an integer from 0 to 5.)
In the above formula (3), R 5 is preferably an alkyl group.

Moreover, the smaller the value of n, the higher the Tg of the resulting cyclic olefin-based resin, which is preferable. In particular, a specific monomer having n of 0 is preferable in terms of easy synthesis.
In the above formula (1), R 1 or R 3 is preferably an alkyl group, more preferably an alkyl group having 1 to 4 carbon atoms, still more preferably an alkyl group having 1 to 2 carbon atoms, particularly A methyl group is preferred. Furthermore, it is preferable that this alkyl group is bonded to the same carbon atom as the carbon atom to which the polar group represented by the above formula (3) is bonded.

Moreover, the specific monomer whose m is 1 in the said Formula (1) is preferable at the point from which the thermoplastic resin composition with higher Tg is obtained.
As a specific example of the specific monomer represented by the above formula (1),
Bicyclo [2.2.1] hept-2-ene,
Tricyclo [5.2.1.0 2,6 ] -8-decene,
Tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
Pentacyclo [6.5.1.1 3,6 .0 2,7 .0 9,13] -4- pentadecene,
Pentacyclo [7.4.0.1 2,5 .19 9,12 .0 8,13] -3- pentadecene,
Tricyclo [4.4.0.1 2,5 ] -3-undecene,
5-methylbicyclo [2.2.1] hept-2-ene,
5-ethylbicyclo [2.2.1] hept-2-ene,
5-methoxycarbonylbicyclo [2.2.1] hept-2-ene,
5-methyl-5-methoxycarbonylbicyclo [2.2.1] hept-2-ene,
5-cyanobicyclo [2.2.1] hept-2-ene,
8 methoxycarbonyltetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-ethoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-n-propoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8 isopropoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-n-butoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl-8-methoxycarbonyltetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl-8-ethoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl -8-n-propoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl-8-isopropoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl -8-n-butoxycarbonyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,

Dimethanooctahydronaphthalene,
Ethyltetracyclododecene,
6-ethylidene-2-tetracyclododecene,
Trimethanooctahydronaphthalene,
Pentacyclo [8.4.0.1 2,5 .1 9,12 .0 8,13] -3- hexadecene,
Heptacyclo [8.7.0.1 3,6 .1 10,17 .1 12,15 .0 2,7 .0 11,16] -4- eicosene,
Heptacyclo [8.8.0.1 4,7 .1 11,18 .1 13,16 .0 3,8 .0 12,17] -5- heneicosene,
5-ethylidenebicyclo [2.2.1] hept-2-ene,
8 ethylidene tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
5-phenylbicyclo [2.2.1] hept-2-ene,
8-phenyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
5-fluorobicyclo [2.2.1] hept-2-ene,
5-fluoromethylbicyclo [2.2.1] hept-2-ene,
5-trifluoromethylbicyclo [2.2.1] hept-2-ene,
5-pentafluoroethylbicyclo [2.2.1] hept-2-ene,
5,5-difluorobicyclo [2.2.1] hept-2-ene,
5,6-difluorobicyclo [2.2.1] hept-2-ene,
5,5-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,6-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5-methyl-5-trifluoromethylbicyclo [2.2.1] hept-2-ene,
5,5,6-trifluorobicyclo [2.2.1] hept-2-ene,
5,5,6-tris (fluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,5,6,6-tetrafluorobicyclo [2.2.1] hept-2-ene,
5,5,6,6-tetrakis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,5-difluoro-6,6-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,6-difluoro-5,6-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,5,6-trifluoro-5-trifluoromethylbicyclo [2.2.1] hept-2-ene,
5-fluoro-5-pentafluoroethyl-6,6-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,6-difluoro-5-heptafluoro-iso-propyl-6-trifluoromethylbicyclo [2.2.1] hept-2-ene,
5-chloro-5,6,6-trifluorobicyclo [2.2.1] hept-2-ene,
5,6-dichloro-5,6-bis (trifluoromethyl) bicyclo [2.2.1] hept-2-ene,
5,5,6-trifluoro-6-trifluoromethoxybicyclo [2.2.1] hept-2-ene,
5,5,6-trifluoro-6-heptafluoropropoxybicyclo [2.2.1] hept-2-ene,

8-fluoro-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene, 8-fluoromethyl-tetracyclo [4.4.0.1 2,5 .1 7,10] -3-dodecene,
8 difluoromethyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-trifluoromethyl-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8 pentafluoroethyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8-difluoro-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,9-difluoro-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,9-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-methyl-8-trifluoromethyl-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9- trifluoro-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9- tris (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9,9- tetrafluoro-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9,9- tetrakis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8-difluoro-9,9-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,9-difluoro-8,9-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9- trifluoro-9-trifluoromethyl-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9- trifluoro-9-trifluoromethoxy-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,8,9- trifluoro-9-pentafluoro propoxy tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-Fluoro-8-pentafluoroethyl-9,9-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,9-difluoro-8-heptafluoro-iso- propyl-9-trifluoromethyl-tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8-Chloro -8,9,9- trifluoro tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8,9-dichloro-8,9-bis (trifluoromethyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
8- (2,2,2-trifluoroethoxy-carbonyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene,
, And the like 8-methyl-8- (2,2,2-trifluoroethoxy-carbonyl) tetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene.

Of these specific monomers, 8-methyl-8-methoxycarbonyltetracyclo [4.4.0.1 2,5 .1 7,10] -3- dodecene, 8-ethylidene tetracyclo [4.4 .0.1 2,5 .1 7,10] -3-dodecene, 8-ethyl tetracyclo [4.4.0.1 2,5 .1 7,10] -3-dodecene, pentacyclo [7.4 .0.1 2,5 .1 9,12 .0 8,13] -3-pentadecene are preferred in that the cyclic olefin resin having excellent heat resistance is obtained.

[Copolymerizable cyclic monomer]
As the copolymerizable cyclic monomer for obtaining a specific ring-opening copolymer, it is preferable to use a cycloolefin having 4 to 20 carbon atoms, particularly 5 to 12 carbon atoms. Specific examples thereof include cyclobutene and cyclopentene. , Cycloheptene, cyclooctene, tricyclo [5.2.1.0 2,6 ] -3-decene, 5-ethylidene-2-norbornene, dicyclopentadiene, and the like.

[Unsaturated double bond-containing compound]
Examples of the unsaturated double bond-containing compound for obtaining a specific saturated copolymer include polybutadiene, polyisoprene, styrene-butadiene copolymer, ethylene-nonconjugated diene copolymer, and carbon- An unsaturated hydrocarbon polymer containing a carbon-carbon double bond can be used.

  The ratio of the specific monomer and the copolymerizable cyclic monomer or unsaturated double bond-containing compound used is the weight ratio of the specific monomer: copolymerizable cyclic monomer or unsaturated double bond-containing compound. It is preferably 100: 0 to 50:50, and more preferably 100: 0 to 60:40.

  When the proportion of the copolymerizable cyclic monomer or unsaturated double bond-containing compound is excessive, the Tg of the resulting copolymer is lowered, and as a result, the heat resistance of the resin is lowered. It becomes difficult to obtain a highly reliable sheet.

(Ring-opening polymerization catalyst)
The ring-opening polymerization reaction of the specific monomer is performed in the presence of a metathesis catalyst. The metathesis catalyst includes at least one metal compound selected from a tungsten compound, a molybdenum compound, and a rhenium compound (hereinafter referred to as “component (a)”), and a Group 1 element (for example, Li, Na, K) of the periodic table. Etc.), Group 2 elements (eg Mg, Ca etc.), Group 12 elements (eg Zn, Cd, Hg etc.), Group 13 elements (eg B, Al etc.), Group 4 elements (eg Ti, Zr etc.) Or at least one compound selected from those having at least one element-carbon bond or the element-hydrogen bond (hereinafter referred to as a compound of a Group 14 element (for example, Si, Sn, Pb, etc.)). And “(b) component”), and may contain an additive (hereinafter referred to as “(c) component”) in order to enhance the catalytic activity. There.

Specific examples of suitable metal compounds constituting the component (a) include metal compounds described in JP-A-1-240517 such as WCl 6 , MoCl 5 , and ReOCl 3 .

Specific examples of the compound constituting the component (b) include n-C 4 H 9 Li, (C 2 H 5 ) 3 Al, (C 2 H 5 ) 2 AlCl, (C 2 H 5 ) 1.5 AlCl 1.5 , (C 2 H 5 ) AlCl 2 , methylalumoxane, LiH and the like, compounds described in JP-A-1-240517 can be mentioned.

  As the component (c), alcohols, aldehydes, ketones, amines and the like can be preferably used, but other compounds shown in JP-A-1-240517 can be used.

[Hydrogenation]
The cyclic olefin resin used in the present invention is obtained by hydrogenating a specific (co) ring-opening polymer in addition to the specific (co) ring-opening polymer and the specific saturated copolymer. A hydrogenated (co) polymer obtained by cyclizing a hydrogenated (co) polymer and a specific (co) ring-opened polymer by Friedel-Craft reaction and then hydrogenating it can be used.

  Since such a hydrogenated (co) polymer has excellent thermal stability, it can prevent its properties from being deteriorated by heating when it is molded or used as a product. it can.

  Here, the hydrogenation rate in the hydrogenated (co) polymer is usually 50% or more, preferably 70% or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 97% or more.

The cyclic olefin resin used in the present invention preferably has an intrinsic viscosity (η inh ) measured in chloroform at 30 ° C. of 0.2 to 5.0 dl / g.
The average molecular weight of the cyclic olefin resin is 8,000 to 100,000 in terms of polystyrene-equivalent number average molecular weight (Mn) measured by gel permeation chromatography (GPC), and 20,200 in weight average molecular weight (Mw). The thing of the range of 000-300,000 is suitable.

Furthermore, it is preferable that the Vicat softening point of cyclic olefin resin is 160 degreeC or more.
-Other components In this invention, the resin which forms each layer of an antistatic film can mix | blend various additives which can be mix | blended with resin other than resin components, such as cyclic olefin resin mentioned above.

Examples of the additive include a function-imparting component such as an antistatic agent, a stabilizer such as an antioxidant and an ultraviolet absorber, and a processability improver such as a lubricant.
In the present invention, the resin forming at least one surface layer of the antistatic film is a cyclic olefin resin containing an antistatic agent. The antistatic agent is not particularly limited as long as it is a compound having an antistatic effect, and preferred examples include a low molecular weight antistatic agent, a high molecular weight antistatic agent, and a conductive filler. These may be used alone or in combination of two or more.

Examples of the low molecular weight antistatic agent include glycerin esters such as glycerin monostearate, glycerin monobehenate, glycerin monopalmitate, and glycerin monolaurate, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, Nonionic surfactants such as N, N-bis (2-hydroxyethyl) alkylamine, N-2-hydroxyethyl-N-2-hydroxyalkylamine, polyoxyethylene alkylamine, and fatty acid ester of polyoxyethylene alkylamine Anionic surfactants such as alkyl sulfonates, alkyl benzene sulfonates, alkyl phosphates, cationic surfactants such as tetraalkyl ammonium salts, tetraalkyl benzyl ammonium salts, Rukirubetain, amphoteric surfactants such as alkyl imidazolium betaine.

  Examples of the polymer antistatic agent include polyether polymers such as polyethylene oxide, polyether ester amide, polyether amide imide, ethylene oxide / epichlorohydrin copolymer, methoxypolyethylene glycol (meth) acrylate copolymer, Examples include quaternary ammonium base-containing polymers such as quaternary ammonium salt-containing (meth) acrylate copolymers, quaternary ammonium base-containing maleimide copolymers, and sulfonate-containing polymers such as polystyrene sulfonate.

Examples of the conductive filler include carbon such as carbon black and carbon nanotubes, metal particles such as nickel, copper, silver, and gold, and metal wires.
The amount of the antistatic agent used is not particularly limited, but when the total amount of the resin components in the resin forming the antistatic layer is 100 parts by mass, preferably 0.05 to 30 parts by mass, more preferably 0.1. -25 mass parts, More preferably, it is 0.1-20 mass parts, Most preferably, it is 0.1-15 mass parts. When a resin composition containing an antistatic agent in such a ratio is used as a resin for forming an antistatic layer that is at least one surface layer, the resulting antistatic film preferably exhibits excellent antistatic performance, Even when the thickness of the antistatic layer is reduced, sufficient antistatic performance can be obtained.

The surface resistance value of the antistatic layer is usually 10 14 Ω / □ or less, preferably 10 13 Ω / □ or less, more preferably 10 12 Ω / □ or less, and particularly preferably 10 11 Ω / □ or less. In particular, if it is 10 11 Ω / □ or less, the adhesion of dust, dust, etc. to the surface of the laminate is significantly reduced, which is effective in preventing the occurrence of defects during film processing. A surface resistance value exceeding 10 14 Ω / □ is not preferable because it is ineffective in preventing the generation of static electricity.

  In the present invention, an antistatic film comprising two or more resin layers is produced. Preferably, at least one surface layer is an antistatic performance-containing layer containing an antistatic agent (antistatic layer), and is antistatic. It is desirable that the layer adjacent to the layer is a layer (base material layer) having no antistatic performance. The layer having no antistatic performance may be one layer or two or more layers.

  In the present invention, it is preferable that the antistatic layer, which is at least one surface layer of the antistatic film, and the base material layer adjacent thereto have the same or similar cyclic olefin resin as a main component. When the main component of each resin constituting each layer of the antistatic film is the same or similar cyclic olefin resin, the adhesion of each layer becomes stronger and the control of the melt extrusion molding condition becomes easier.

<Melt extrusion molding>
In the method for producing an antistatic film of the present invention, a plurality of resins forming each layer of the antistatic film are simultaneously melt extruded using a T die. In the present invention, the apparatus used for melt extrusion molding is not particularly limited as long as the resin forming each layer of the laminate is configured to be discharged from a T die and formed into a film shape. Examples include a multi-manifold system, a feed block system, and a combination of both. When the laminate to be manufactured has three or more layers and two or more layers not adjacent to each other are layers formed of the same resin, it is preferable to use an apparatus including a feed block method.

  In the method for producing an antistatic film of the present invention, molten raw materials constituting each layer are simultaneously melt extruded from a T-die discharge port, laminated in a molten state, and cooled to obtain an antistatic film.

As such an extrusion molding method, for example, two or more kinds of resins as raw materials are melted by separate extruders, and the melted resins are quantitatively supplied by separate gear pumps, which are respectively separated by separate polymer filters. To remove impurities, superimpose two or more molten resins in a film using a feed block, discharge the molten film from the T-die, and use a take-up machine And a method of cooling the film in a molten state and winding it using a winder.

  For example, when a three-layer laminate having a sandwich structure is obtained from two kinds of compositions, one of the compositions is melted by an extruder, quantitatively supplied by a gear pump, and filtered by a polymer filter. It can also be formed by dividing the flow channel into two and sandwiching the other composition from both sides with a feed block.

  In the present invention, it is also preferable to press the obtained antistatic film using a pressure roller after laminating in a molten state. When pressure is applied, each layer of the resulting antistatic film is more firmly bonded.

  As a method of cooling and laminating a molten film extruded from a T-die, a nip roll method, an electrostatic application method, an air knife method, a calendar method, a single-sided belt method, a double-sided belt method, a three-roll method In order to manufacture a sheet with little optical distortion, a sheet manufacturing apparatus called a single-side belt type, particularly a sleeve type as shown in FIG. 1, is preferably used.

  FIG. 1 is an explanatory diagram showing an outline of an example of a production apparatus used in the method for producing a laminate according to the present invention. In this figure, 10 is an extruder of two or more, 13 is a feed block, 11 is a T die in which a plurality of parallel layers are extruded simultaneously, and this T die has its discharge port 12 facing downward. Has been placed. Further, below the T die 11, a cooling belt 30 made of a metal cooling roll 20 and a metal endless belt is in pressure contact with each other, and both contact ends E are discharged from the T die 11. It arrange | positions in the state located directly under the exit 12. FIG.

  The cooling belt 30 is in a state of being pressed against the cooling roll 20 by a first holding roll 31 and a second holding roll 32 provided so as to be in contact with the inner surface thereof, and in a state where tension is applied. Is retained. Furthermore, a peeling roll 40 for peeling the cyclic olefin-based resin pressure-bonded to the cooling roll 20 from the cooling roll 20 is arranged in parallel with the cooling roll 20.

In the apparatus having such a configuration, the cooling roller acts as a pressure roller, the melted film laminated in the melted state after discharge is pressurized, and the layers of the laminate are more firmly bonded.
As the extruder 10, any of a single screw, a twin screw, a planetary type, a kneader and the like may be used, but a single screw extruder is preferably used. Further, examples of the screw shape of the extruder include a vent type, a tip dull mage type, a full flight type, and the like, and a full flight type is preferable. The gear pump used for measuring the resin may be either an internal lubrication type or an external lubrication type, but the external lubrication type is preferred.

  Moreover, it is preferable that the extruder 10 is equipped with the polymer filter which filters the foreign material of a raw material, and a leaf disc type, a candle filter type, a leaf type, a screen mesh etc. are mentioned as a polymer filter, for example.

For the T die 11, it is essential to make the resin flow inside the T die uniform. To maintain the uniformity of the film thickness, the pressure distribution inside the T die near the T die outlet is constant in the width direction. It is essential. For satisfying such conditions, a manifold type T die, a fish tail type T die, a coat hanger type T die, or the like can be used, and among these, a coat hanger type T die is preferable. A bending lip type is preferable for adjusting the flow rate of the T die. Further, a T die having a function of adjusting the thickness by automatic control by a heat bolt method is particularly preferable. Installing a choke bar to adjust the flow rate or attaching a lip block to adjust the thickness creates a step in the mounting part, or traps air or the like in the gap of the mounting part. This is not preferable because it may cause generation or die line. The outlet of the T die 11 is preferably coated with a carbide coating such as tungsten carbide.

Examples of the material of the T die 11 include, but are not limited to, SCM steel and stainless steel such as SUS.
Further, as the T die 11, the surface thereof is plated with chromium, nickel, titanium or the like, TiN, TiAlN, TiC, CrN, DLC (diamond-like carbon), etc. by PVD (Physical Vapor Deposition) method or the like. In other words, those having a coating formed thereon, those having other ceramics or super hard metal sprayed thereon, those having a surface subjected to nitriding treatment, or the like can be used. Such a die has high surface hardness and low friction with the resin, so that it is possible to prevent burnt dust and the like from being mixed into the resulting laminate, and to prevent the occurrence of die lines. It is preferable in that it can be performed.

As a method for joining the resin flow paths, a method such as a feed block and a multi-manifold is preferably used.
As the feed block 13, one for two or two layers or two or three layers for using two or more kinds of materials is preferably used. As for the multi-manifold method, a T die having a plurality of manifolds is preferably used, and those for two-kind two-layers, two-kind three-layers, etc. are preferably used. The cooling roll 20 has a heating means and a cooling means inside, and the surface roughness Rmax is 0.5 μm or less, preferably 0.3 μm or less, particularly preferably 0.1 μm or less. preferable. As the cooling roll 20, a metal roll plated is preferably used, and a chrome plated or electroless nickel plated is particularly preferable. The outer diameter of the cooling roll 20 is preferably 400 mmΦ or less at the outer periphery. More preferably, it is 350 mmΦ, and more preferably 300 mmΦ or less. When the outer periphery of the cooling roll 20 is larger than 400 mmΦ, it takes a long time until the molten resin is pushed out of the die and comes into contact with the cooling roll. There is a possibility that the surface appearance of the resulting antistatic film may be deteriorated or a residual retardation may be caused.

  The cooling belt 30 preferably has a thickness of 0.5 mm or less, and particularly preferably has a thickness of 0.35 mm or less. If the thickness of the cooling belt 30 exceeds 0.5 mm, it is necessary to increase the outer shape of the roll that supports the belt, which is not preferable. As the cooling belt 30, a seamless belt is preferably used. When a cooling belt having a seam is used, it is not preferable because a mark of the seam is formed on the resulting antistatic film. The cooling belt 30 is preferably a mirror belt having a surface roughness (Rmax) of 0.3 μm or less. The thickness of the cooling belt 30 is preferably 0.6 to 1.2 mm. When the thickness is less than 0.6 mm, the belt is easily deformed, which is not preferable. On the other hand, when the thickness exceeds 1.2 mm, the belt is not preferable because the flexibility becomes small. As a material constituting the cooling belt 30, stainless steel or the like can be used.

A heater 50 is provided on the back side of the cooling belt 30, and the cooling belt 30 is heated by the heater 50.
The first holding rolls 31 are arranged at a height level substantially the same as that of the cooling roll 20 so as to be spaced apart from the cooling roll 20 in parallel. The surface of the first holding roll 31 is preferably coated with silicone rubber or other heat-resistant elastomer, and the thickness of the coating layer is more preferably 5 to 15 mm. By providing such a coating layer, when the cyclic olefin-based resin is sandwiched between the cooling roll 20 and the cooling belt 30, the compressive stress acting on the resin is relieved. An increase in phase difference due to residual distortion can be prevented. Moreover, it is preferable that the 1st holding roll 31 has a heating means and a cooling means inside.

  The second holding roll 32 is arranged below the cooling roll 20 in parallel with the cooling roll 20. This second holding roll is a contact distance adjusting roll for adjusting the contact distance between the cooling roll 20 and the cooling belt 30 and can be moved in an arc shape with the central axis of the cooling roll 20 as a reference, for example. Is provided.

  In FIG. 1, the laminated molten resin 1 is configured to pass in contact with the surface of the cooling roll 20 and the surface of the cooling belt 30 supported by the holding rolls 31 and 32. However, in the present invention, the resin laminated in the molten state may be configured to pass between the cooling roll and the other roll, and the cooling belt supported by the holding roll and the other cooling. You may be comprised so that it may pass between between belts.

  In the above, the cooling roll 20 and the cooling belt 30 are preferably arranged as close to the T die 11 as possible. For example, the cooling roll 20 and the cooling belt are discharged from the discharge port 12 of the T die 11. It is preferable that the distance D of the perpendicular line connecting to the contact end E with 30 is 300 mm or less, particularly 250 mm or less. When the distance D exceeds 300 mm, the molten cyclic olefin resin discharged from the discharge port 12 of the T die 11 is remarkably cooled until it is sandwiched between the cooling roll 20 and the cooling belt 30. Therefore, a phase difference due to residual distortion is likely to occur.

Further, the contact distance between the cooling roll 20 and the cooling belt 30 is preferably 20 cm or more, and particularly preferably 25 cm or more.
With the above apparatus, for example, an antistatic film can be produced as follows.

  Usually, before introducing the resin as a raw material into the extruder, moisture, gas (oxygen, etc.), residual solvent, etc. contained in the resin are removed in advance so as to have an appropriate Tg or less of the resin. Dry the resin at temperature.

  As the dryer used for drying, an inert gas circulation dryer or a vacuum dryer is preferably used. It is also preferable to use a vacuum hopper that can absorb moisture in the hopper or seal the hopper with an inert gas such as nitrogen or argon, or can be kept in a reduced pressure state in order to suppress oxygen absorption.

The extruder cylinder is preferably sealed with an inert gas such as nitrogen or argon in order to prevent the resin from being oxidized during the melt extrusion and generating a gel or the like.
The resin forming each layer melted in the extruder 10 passes through the feed block 13 and is extruded from the discharge port 12 of the T die 11 downward in the vertical direction, and laminated. The temperature distribution at the outlet of the T die 11 is preferably ± 1 ° C. or less. If the temperature distribution at the outlet of the die 11 exceeds ± 2 ° C., a difference in the melt viscosity of the resin occurs in each raw resin, and thickness unevenness, stress distribution unevenness, etc. are likely to occur, which is not preferable.

Thereafter, the laminated molten resin 1 is sandwiched between the cooling roll 20 and the cooling belt 30, thereby cooling the cyclic olefin-based resin. And the antistatic film 2 is manufactured when the laminated resin press-bonded to the surface of the cooling roll 20 is peeled off from the surface of the cooling roll 20 by the peeling roll 40. It is to be noted that a peeling roll is disposed so as to be in contact with the cooling belt, the molten resin that has been extruded and laminated is pressed onto the surface of the cooling belt, and the resin sheet is peeled off from the surface of the cooling belt. May be obtained.

  In the present invention, the processing temperature of the resin forming each layer, that is, the set temperature of the extruder 10 and the T-die 11 can discharge the molten resin with uniform fluidity from the T-die 11, thereby deteriorating the resin. From the viewpoint of suppression, it is preferably Tg + 100 ° C. or higher and Tg + 200 ° C. or lower of the resin. When the processing temperature is less than Tg + 100 ° C., the fluidity of the resin is non-uniform, and therefore, it is not preferable because the resin is not stably discharged from the T die 11 and thickness unevenness is likely to occur in the resulting laminate. On the other hand, when the processing temperature exceeds Tg + 200 ° C., the resin molecular chain is broken or oxidized when discharged from the T die 11, so that the resin is likely to deteriorate. In addition, when Tg of resin which comprises each layer differs, although it usually judges about Tg of base-material resin, it is more preferable to satisfy | fill the said temperature conditions about Tg of resin of all the layers.

  The surface temperature of the cooling roll 20 is not particularly limited as long as it is sufficiently cooled, but is a laminated molten resin sandwiched between the cooling roll 20 and the cooling belt 30. Is a temperature at which the temperature can be set to Tg + 5 ° C. or higher of the resin, since a resin sheet having excellent optical properties can be obtained.

  For the same reason, the surface temperature of the cooling belt 30 is a temperature at which the cyclic olefin-based resin sandwiched between the cooling roll 20 and the cooling belt 30 can be set to a temperature equal to or higher than Tg + 5 ° C. of the resin. It is preferable.

  The circumferential speeds of the cooling roll 20 and the cooling belt 30 are preferably substantially equal, and the difference in circumferential speed is within ± 5%, preferably within ± 1%. The peripheral speed of the outer periphery of the cooling roll 20 and the peripheral speed of the outer periphery of the cooling belt 30 are preferably 2 to 30 m / min, more preferably 4 to 25 m / min.

  The temperature of the resin at the time of peeling the laminated molten resin pressure-bonded to the surface of the cooling roll 20 from the cooling roll 20 is Tg-100 ° C to Tg + 10 ° C, preferably Tg-30 ° C to Tg + 10 ° C. is preferable. If it is peeled at a temperature lower than this temperature, the appearance may be deteriorated because wrinkles are generated on the surface, and if it is peeled at a temperature higher than this temperature, the residual phase difference becomes high and it is difficult to obtain a mediocre film. There is.

The take-up speed of the resin sheet is preferably lower than the rotational peripheral speed of the cooling roll 20, specifically, when the rotational peripheral speed of the cooling roll 20 is V 1 and the take-up speed of the resin sheet S is V 2. it is preferable that the ratio V 2 / V 1 is 0.7 to 0.99, more preferably 0.75 to 0.9, particularly preferably from 0.8 to 0.85. If this ratio V 2 / V 1 is less than 0.7, the sheet is liable to sag. On the other hand, if this ratio V 2 / V 1 exceeds 0.99, excessive tension is applied to the sheet. May act and the sheet may break.

  The thickness of the antistatic film obtained by the production method of the present invention varies depending on the use, but is usually in the range of 0.03 to 1.0 mm, and preferably in the range of 0.04 to 0.8 mm.

In the present invention, the thickness of each layer of the antistatic film can be appropriately controlled by the amount of raw material to be introduced. Moreover, since the width of each layer is equal in the antistatic film of the present invention, the extruder used is adapted to the desired discharge amount. For example, when the thickness of the base film layer is 100 μm, the antistatic layer is sandwiched between the both surfaces with a thickness of 20 μm, the width of the film is 600 mm, and the take-up speed is about 700 mm / min. The discharge amount of the material film layer is 40 kg / hr, and it is desirable that the extruder used is 65 mmΦ, the discharge amount of the antistatic layer is 15 kg / hr, and the extruder used is 40 mmΦ. Can be used.

≪Antistatic film≫
The antistatic film of the present invention is a laminate composed of two or more resin layers, and is preferably produced by the above-described method for producing an antistatic film.

  The antistatic film of the present invention is an antistatic layer in which at least one surface layer has antistatic performance. In particular, it is preferable that a surface layer having antistatic performance (hereinafter also referred to as an antistatic layer) is provided on at least one surface of the base material layer which is a transparent resin layer.

  When the antistatic film of the present invention comprises an antistatic layer and a base material layer, the base material layer may be a single layer or a plurality of layers, and the antistatic layer may be formed on one side. It may be formed on both sides.

  Since the antistatic layer contains an antistatic agent in the above-mentioned cyclic olefin-based resin, there is a concern about a decrease in transparency. However, in the antistatic film of the present invention, the antistatic layer is manufactured by the above-described method. For example, 1 to 100 μm or less, preferably 5 to 80 μm, more preferably about 10 to 50 μm, and sufficient antistatic performance. Therefore, the laminate of the present invention used as an antistatic film can have a high degree of transparency. By laminating the antistatic layer on at least one side of the extruded film, the surface resistance value, which is an index of antistatic performance, can be lowered. In particular, in the case of a normal single layer extruded film or the like, it is preferable because antistatic performance can be achieved by adding a small amount of an antistatic agent.

The laminate of the present invention used as an antistatic film preferably has a haze of 1% or less.
The antistatic film of the present invention having an antistatic layer has a thickness of usually 30 to 1000 μm, preferably 40 to 800 μm. Moreover, the thickness of the base material layer (total of layers other than the antistatic layer) of the antistatic film of the present invention having the antistatic layer is usually in the range of 50 to 800 μm, preferably 60 to 200 μm.

The thickness of the antistatic layer is preferably 50% or less, more preferably 25% or less of the thickness of the base film layer.
〔Example〕
EXAMPLES Hereinafter, although this invention is demonstrated further more concretely based on an Example, this invention is not limited to these Examples. In the following, “parts” and “%” mean “parts by weight” and “% by weight” unless otherwise specified.

In the following examples and comparative examples, various physical properties were measured as follows.
(Haze / total light transmittance)
The haze and total light transmittance were measured by ASTM D1003 using a haze meter (Murakami Color Research Laboratory: HM-150).
(Surface resistance value)
Measurement was performed by ASTM D0257 using a resistivity measuring device Agilent 4339B manufactured by Agilent Technology.

<Synthesis of Resin (a-1)>
In a reaction vessel purged with nitrogen, 8-methyl-8-carboxymethyltetracyclo [4.4.0.1 2,5 . 1 7,10 ] -3-dodecene 225 parts, bicyclo [2.2.1] hept-2-ene 25 parts as a specific monomer b, 1-hexene 27 parts as a molecular weight regulator, and toluene as a solvent 750 parts were charged and the solution was heated to 60 ° C. Next, 0.62 parts of a toluene solution containing 1.5 mol / l of triethylaluminum as a polymerization catalyst and tungsten hexachloride modified with t-butanol and methanol (t-butanol: methanol: tungsten) are added to the solution in the reaction vessel. = 0.35 mol: 0.3 mol: 1 mol) containing 3.7 parts of a 0.05 mol / l toluene solution, and the system was opened by heating and stirring at 80 ° C. for 3 hours. A ring-opening copolymer solution was obtained by a ring copolymerization reaction. This ring-opening group copolymer is referred to as “resin (a-1)”.

The polymerization conversion rate in this polymerization reaction was 97%.
Moreover, when the number average molecular weight (Mn) and weight average molecular weight (Mw) in terms of polystyrene were measured for the resin (a-1) by gel permeation chromatography (GPC, solvent: tetrahydrofuran), the number average molecular weight (Mn ) Was 20,800, the weight average molecular weight (Mw) was 62,000, and the molecular weight distribution (Mw / Mn) was 3.00.

Moreover, the glass transition temperature (Tg) of resin (a-1) was 130 degreeC, and the saturated water absorption in 23 degreeC was 0.3%. Moreover, when SP value of resin (a-1) was measured, it was 19 (MPa 1/2 ), and it was 0.51 dl / g when intrinsic viscosity ((eta) inh ) was measured in 30 degreeC chloroform. .

<Synthesis Example 2>
As the specific monomer a, 8-methyl-8-methoxycarbonyltetracyclo [4.4.0.1 2,5 . 1, 10 ] -3-dodecene 237 parts and 5- (4-biphenylcarbonyloxymethyl) bicyclo [2.2.1] hept-2-ene 13 parts as specific monomer b Obtained a hydrogenated polymer (hereinafter also referred to as “resin (b-1)”) in the same manner as in Synthesis Example 1.

With respect to the obtained resin (b-1), the hydrogenation rate was measured by a 400 MHz 1 H-NMR spectrum and found to be 99.9%, and it was confirmed that the aromatic ring was not substantially hydrogenated. It was done.

  Moreover, when the number average molecular weight (Mn) and weight average molecular weight (Mw) of polystyrene conversion were measured about the resin (b-1) by the gel permeation chromatography (GPC, solvent: tetrahydrofuran), number average molecular weight (Mn ) Was 19,000, the weight average molecular weight (Mw) was 57,000, and the molecular weight distribution (Mw / Mn) was 3.98.

Moreover, the glass transition temperature (Tg) of resin (b-1) was 150 degreeC, and the saturated water absorption in 23 degreeC was 0.3%. Further, the intrinsic viscosity (η inh ) of the resin (b-1) measured in chloroform at 30 ° C. was 0.47 dl / g.

[Example 1]
Resin (a-1) was dissolved in toluene to a concentration of 30%. The solution viscosity at room temperature of the obtained solution was 30,000 mPa · s. To this solution, pentaerythrityltetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] as an antioxidant was added in an amount of 0.3 with respect to 100 parts by weight of the resin (a-1). Part by weight was added, and the resulting solution was filtered using a metal fiber sintered filter made by Nippon Seisen with a pore diameter of 5 μm while controlling the flow rate of the solution so that the differential pressure was within 0.4 MPa. Using a shaft extruder (manufactured by Toshiba Machine Co., Ltd .; TEM-48), while extruding toluene with a three-stage vent, extrusion was performed downstream using a gear pump, with a nominal aperture of 10 μm. Using a metal fiber sintered filter made of wire, extruded in a string form from a die heated to 270 ° C., cooled in ion-exchanged water cleaned through a PVDF filter having a mesh opening of 0.2 μm, and 40 ℃ or less The strand cooled to 1 mm was cut with a strand cutter to obtain a pellet. (Resin A-1)
The pellets were melted at 270 ° C. using a single screw extruder (GM Engineering Co., Ltd .; GM-90) while measuring at a rate of 80 kg / hr with a gear pump, and the melted resin was introduced into a filter having an opening of 10 μm. After removing the foreign matter, it was led to a feed block at 270 ° C.

  On the other hand, the resin (a-1) was blended with 3 parts of the surfactant sodium dodecylbenzenesulfonate (S412-2 manufactured by Takemoto Yushi Co., Ltd.) as a second component as a modifier, and this was mixed with a twin screw extruder. (Toshiba Machine, TEM-37) is used for melt-kneading, passing through a filter with a mesh size of 10 μm while measuring with a gear pump at a rate of 20 kg / hr, then dividing the flow path into two parts and feeding the above A resin solution is introduced from the top and bottom of the block, and the above-mentioned resin A-1 film is sandwiched from both sides. Using a coat hanger type T die (1000 mm width), the gap at the T die exit is 0.5 mm. Extruded into a film at 280 ° C., the take-off speed was 8 m / min, and an extruded film of 100 μm was obtained. The extruded film was a multilayer sheet of two types and three layers, and the film thickness on both sides was 10 μm.

The extruded film was cooled at 130 ° C. using a mirror roll of a mirror roll having a surface roughness of 0.1 S (Rmax ≦ 0.1 μm) to transfer the shape of the mirror.
In order to measure the antistatic performance of the obtained film, a surface resistance measuring device was used to measure the surface resistance of both sides of the film.

The first layer side of the film was the front surface, and the third layer side was the back surface.
The surface resistance of the surface was 1.2 × 10 10 Ω / □, and the resistance value on the back side was 1.1 × 10 10 Ω / □. Further, the cloudiness of the film was measured and found to be 0.2%, and the total light transmittance was 91%.

[Example 2]
Instead of the resin A-1 obtained in Example 1 above, the resin B-1 produced in Synthesis Example 2 was used, and the other production methods were the same as in Example 1.

  An extruded sheet having a sheet thickness of 400 μm was obtained at a take-up speed of 2.5 m / min. In order to measure the antistatic performance of the obtained film, the surface resistance of both surfaces of the film was measured in the same manner as in Example 1.

The surface resistance of the surface was 9.7 × 10 10 Ω / □, and the resistance value on the back side was 7.5 × 10 10 Ω / □. The haze value of the film was 0.3%, and the total light transmittance was 91%.
[Comparative Example 1]
Resin A-1 was melted and filtered in the same manner as in Example 1 above. When forming a film, a multilayer film having a film thickness of 100 μm was produced using only the same kind of material without adding the second component.

In order to measure the antistatic performance of the obtained film, the surface resistance of both surfaces of the film was measured in the same manner as in Example 1.
The surface resistance of the surface is 6.3 × 10 16 Ω / □, and the resistance value on the back side is 8.7 × 10 16 Ω.
/ □.
The haze of the film was 0.2% and the total light transmittance was 91%.
[Comparative Example 2]
After adding 3 parts of the additive of the second component used in the above Example 1 to the resin A-1, a film having a single layer thickness of 100 μm is obtained using the same extruder as in Example 1. It was. The surface resistance of the front side of the film was 1.7 × 10 10 Ω / □, and the resistance value of the back side was 2.3 × 10 10 Ω / □.

The haze of the film was 15% and the total light transmittance was 45%.
[Comparative Example 3]
A film having a single layer thickness of 100 μm using the same extruder as in Example 1 after adding 0.3 part of the additive of the second component used in Example 1 to the resin A-1. Got. The surface resistance of the front side of the film was 1.2 × 10 16 Ω / □, and the resistance value of the back side was 6.3 × 10 16 Ω / □.

  The haze value of the film was 1.5%, and the total light transmittance was 90%.

FIG. 1 is an explanatory view showing an outline of a production apparatus used in the method for producing a laminate of the present invention. FIG. 2 is a conceptual cross-sectional view of an antistatic film in which an antistatic layer is formed on both surfaces of a base material layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated resin laminated | stacked 2 Antistatic film 10 Extruder 11 Die 12 Discharge port 13 Field block 20 Cooling roll 30 Cooling belt 31 1st holding roll 32 2nd holding roll 40 Peeling roll 50 Heater E Cooling Contact end of roll for cooling and cooling belt 60 Base material layer 61 Antistatic layer

Claims (5)

  1. A method for producing an antistatic film having two or more resin layers,
    Each of the resin layers contains a cyclic olefin resin,
    The resin layer forming at least one surface layer is an antistatic layer containing an antistatic agent,
    A method for producing an antistatic film, wherein a cyclic olefin-based resin forming each layer is simultaneously melt-extruded using a T-die and laminated in a molten state.
  2.   2. The method for producing an antistatic film according to claim 1, wherein the film is laminated in a molten state and then pressurized using a pressure roller.
  3.   An antistatic film obtained by the method according to claim 1.
  4.   The antistatic film according to claim 3, wherein the antistatic layer has a thickness of 1 to 100 μm.
  5.   The antistatic film according to claim 3 or 4, wherein an antistatic layer having an antistatic property is formed on at least one surface of the base material layer which is a transparent resin layer.
JP2006063125A 2006-03-08 2006-03-08 Method for producing antistatic film and antistatic film Pending JP2007237555A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104275814A (en) * 2014-09-16 2015-01-14 绍兴博瑞挤出设备有限公司 Device and process for producing and forming OV type high-gloss films

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07126434A (en) * 1993-10-29 1995-05-16 Nippon Zeon Co Ltd Antistatic composition, resin composition and molding composed of the same
JP2000226459A (en) * 1999-02-05 2000-08-15 Daiya Plastic Kk Olefin resin film and its production
JP2002249600A (en) * 2001-02-23 2002-09-06 Sekisui Chem Co Ltd Norbornene-based resin film and method for manufacturing the same
JP2004338379A (en) * 2003-04-21 2004-12-02 Nitto Denko Corp Antistatic optical film, its manufacturing method, and image display device
JP2005238739A (en) * 2004-02-27 2005-09-08 Jsr Corp Laminated body and method for manufacturing the same
JP2005314563A (en) * 2004-04-28 2005-11-10 Jsr Corp Antistatic film

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07126434A (en) * 1993-10-29 1995-05-16 Nippon Zeon Co Ltd Antistatic composition, resin composition and molding composed of the same
JP2000226459A (en) * 1999-02-05 2000-08-15 Daiya Plastic Kk Olefin resin film and its production
JP2002249600A (en) * 2001-02-23 2002-09-06 Sekisui Chem Co Ltd Norbornene-based resin film and method for manufacturing the same
JP2004338379A (en) * 2003-04-21 2004-12-02 Nitto Denko Corp Antistatic optical film, its manufacturing method, and image display device
JP2005238739A (en) * 2004-02-27 2005-09-08 Jsr Corp Laminated body and method for manufacturing the same
JP2005314563A (en) * 2004-04-28 2005-11-10 Jsr Corp Antistatic film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104275814A (en) * 2014-09-16 2015-01-14 绍兴博瑞挤出设备有限公司 Device and process for producing and forming OV type high-gloss films

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