WO2009104480A1 - Film de résine stratifié diffusant la lumière, son procédé de fabrication, film antireflet, polariseur antireflet et dispositif d'affichage d'image - Google Patents

Film de résine stratifié diffusant la lumière, son procédé de fabrication, film antireflet, polariseur antireflet et dispositif d'affichage d'image Download PDF

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Publication number
WO2009104480A1
WO2009104480A1 PCT/JP2009/051954 JP2009051954W WO2009104480A1 WO 2009104480 A1 WO2009104480 A1 WO 2009104480A1 JP 2009051954 W JP2009051954 W JP 2009051954W WO 2009104480 A1 WO2009104480 A1 WO 2009104480A1
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Prior art keywords
resin
film
light
laminated
layer
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PCT/JP2009/051954
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English (en)
Japanese (ja)
Inventor
誠治 室
康弘 渡辺
智博 前川
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住友化学株式会社
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Publication of WO2009104480A1 publication Critical patent/WO2009104480A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/408—Matt, dull surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/38—Anti-reflection arrangements

Definitions

  • the present invention relates to a light diffusing laminated resin film based on a transparent resin and a method for producing the same, and more particularly to a light diffusing laminated resin film having excellent surface smoothness and a method for producing the same.
  • the present invention also relates to an antiglare (antiglare) film using the light diffusing laminated resin film, and an antiglare polarizing plate and an image display device using the antiglare film.
  • a film having light diffusing properties is bonded to a transparent substrate to form a light diffusing plate, which can be applied to lighting covers, lighting signs, etc., or to impart light diffusing functions and lens functions to liquid crystal TVs, projection TVs, etc. It is used for various purposes such as application to other members.
  • the light diffusion property is imparted to the resin film by a method of dispersing transparent fine particles having a specific particle diameter and a refractive index different from that of the base material in the transparent resin as the base material (for example, JP-A-3-237133 (Patent Document 1)), a method of coating fine particles on the surface of a substrate made of a transparent resin (for example, JP-A-6-59108 (Patent Document 2)), unevenness on the surface of a resin film Has been carried out by a method of transferring the toner (for example, JP-A-2000-267088 (Patent Document 3)).
  • a method of dispersing transparent fine particles having a specific particle diameter and a refractive index different from that of the base material in the transparent resin as the base material for example, JP-A-3-237133 (Patent Document 1)
  • a method of coating fine particles on the surface of a substrate made of a transparent resin for example, JP-A-6-59108 (Patent Document 2)
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a light diffusing resin film having a smooth surface and less unevenness and a method for producing the same. Another object of the present invention is to provide an antiglare film using such a light diffusing resin film, and an antiglare polarizing plate and an image display device using the antiglare film.
  • the present invention provides a resin layer (A) made of a transparent resin in which a light diffusing agent having a weight average particle diameter of 1 to 20 ⁇ m is dispersed, and a first layer laminated on one surface of the resin layer (A).
  • the laminated film is formed in a state where at least one surface of the film is in contact with an elastic roll.
  • the concentration of the light diffusing agent in the resin layer (A) is X (wt%), and the thicknesses of the first and second transparent resin layers (B) are Y, respectively.
  • X wt%
  • Y ′ ⁇ m
  • the relationship represented by the following formulas (1) and (2) is satisfied.
  • the concentration X of the light diffusing agent in the resin layer (A) is preferably 5% by weight or more and 40% by weight or less.
  • the arithmetic mean roughness R a of the surface opposite to the resin layer (A) side 0 0. It is preferably 5 ⁇ m. Also, the first and second transparent resin layer (B) side surfaces of the resin layer (A) and the resin layer (A) side surfaces of the first and second transparent resin layers (B) are in contact with each other. Is preferred.
  • the first and second transparent resin layers (B) are composed of a methyl methacrylate resin, a resin composition containing a methyl methacrylate resin and a rubbery polymer, a styrene resin, an aromatic polycarbonate resin, and an alicyclic structure. It is preferable to consist of resin containing a containing ethylenically unsaturated monomer unit, or these 2 or more types of mixed resin.
  • the transparent resin includes a methyl methacrylate resin, a resin composition in which a rubber-like polymer is contained in a methyl methacrylate resin, a styrene resin, and a resin composition in which a rubber-like polymer is contained in a styrene resin. It is preferable that it is a thing, an aromatic polycarbonate resin, or these 2 or more types of mixed resin.
  • the present invention also provides a resin layer (A) made of a transparent resin in which a light diffusing agent having a weight average particle diameter of 1 to 20 ⁇ m is dispersed, and a first layer laminated on one surface of the resin layer (A).
  • a transparent resin layer (B) and a second transparent resin layer (B) laminated on the other surface are provided, and a method for producing a light-diffusing laminated resin film having a thickness of 30 to 500 ⁇ m is provided.
  • the method for producing a light diffusing laminated resin film of the present invention comprises a resin composition for forming a resin layer (A), a resin composition for forming a first transparent resin layer (B), and a second transparent resin layer (B).
  • the relationship represented by the following general formulas (1) and (2) is satisfied in a state where at least one surface of a laminated film obtained by coextrusion molding using a resin composition that forms a) is in contact with an elastic roll And a step of forming the laminated film.
  • an antiglare film comprising the light diffusing laminated resin film of the present invention and a hard coat layer laminated on the surface of the light diffusing laminated resin film and having a fine irregular shape on the surface. Is done.
  • the internal haze of the light diffusing laminated resin film is 5% or more and 30% or less, and the hard coat layer has a surface haze of 0.5% or more and 15% or less. Is 2% or less.
  • the relative scattered light intensity T (20) in the normal direction of the hard coat layer side when light is incident at an incident angle of 20 ° from the light diffusing laminated resin film side is 0.0001% or more. It is 0.0006% or less, and the relative scattered light intensity T (30) in the normal direction of the hard coat layer side when light is incident from the light diffusing laminated resin film side at an incident angle of 30 ° is 0.00004% or more and 0 It is preferable that it is .0002% or less.
  • the reflectance R (30) at a reflection angle of 30 ° is 0.05% or more and 2% or less, and the reflectance R at a reflection angle of 40 °.
  • (40) is preferably 0.0001% or more and 0.005% or less, and the reflectance R (50) at a reflection angle of 50 ° is preferably 0.00001% or more and 0.0005% or less.
  • the antiglare film of the present invention may further have a low reflection film on the uneven surface of the hard coat layer.
  • an antiglare polarizing plate comprising any one of the above antiglare films and a polarizing film laminated on the antiglare film.
  • the polarizing film is disposed on the light diffusing laminated resin film side of the antiglare film.
  • the antiglare film or the antiglare polarizing plate of the present invention can be combined with an image display element such as a liquid crystal display element or a plasma display panel to form an image display device. That is, according to the present invention, the antiglare film according to any one of the above or the antiglare polarizing plate and an image display element are provided, and the antiglare film or the antiglare polarizing plate has a hard coat layer side. An image display device is provided that is disposed on the outside of the image display element on the viewing side.
  • the present invention it is possible to obtain a light diffusing laminated resin film in which the surfaces of the first and second transparent resin layers (B) are smooth and have less unevenness. Therefore, when the surface is subjected to processing such as bonding of a film or coating of a resin composition or the like, entry of bubbles into the interface or warping of the film is eliminated or reduced, thereby improving workability. be able to. In addition, defects during processing can be reduced, and changes in optical characteristics before and after processing can be minimized.
  • the interface between the light diffusing laminated resin film and the hard coat layer and the light diffusing laminated resin film and the polarizing film Bubbles entering the interface and warping of the film can be eliminated or reduced.
  • the antiglare film and antiglare polarizing plate of the present invention can be suitably applied to an image display device such as a liquid crystal display device.
  • the incident direction of light and the transmitted scattered light intensity measurement direction are determined.
  • the light diffusing laminated resin film of the present invention comprises a first transparent resin layer (B) on one surface of a resin layer (A) made of a transparent resin in which a light diffusing agent is dispersed, and a first layer on the other surface. Two transparent resin layers (B) are laminated.
  • b1) and (b2)) are not particularly limited as long as they can be melted.
  • polyvinyl chloride resin acrylonitrile-butadiene-styrene resin
  • low density polyethylene resin high density polyethylene resin
  • linear low density Polyethylene resin polystyrene resin
  • polypropylene resin acrylonitrile-styrene resin
  • cellulose acetate resin ethylene-vinyl acetate resin
  • acrylic-acrylonitrile-styrene resin acrylic-chlorinated polyethylene resin
  • ethylene-vinyl alcohol resin fluorine resin
  • methyl methacrylate Resin methyl methacrylate Rene resin
  • polyacetal resin polyamide resin
  • polyethylene terephthalate resin aromatic polycarbonate resin
  • polysulfone resin polyethersulfone resin
  • methylpentene resin polyarylate resin
  • polybutylene terephthalate resin alicyclic structure-containing ethylenically unsaturated monomer
  • General-purpose plastics or engineering plastics such as resins containing units, polyphenylene sulf
  • transparent resin (a) and the transparent resins (b1) and (b2) may be the same or different.
  • transparent resin (b1) and the transparent resin (b2) may be the same or different.
  • “transparency” means that the total light transmittance of a resin having a thickness of 1 mm with smooth both surfaces is 85% or more.
  • a resin containing a methyl methacrylate resin, a styrene resin, an aromatic polycarbonate resin, and an alicyclic structure-containing ethylenically unsaturated monomer unit it is preferable to use.
  • the methyl methacrylate resin is a polymer containing 50% by weight or more of methyl methacrylate units.
  • the content of methyl methacrylate units is preferably 70% by weight or more, and may be 100% by weight.
  • the polymer having a methyl methacrylate unit of 100% by weight is a methyl methacrylate homopolymer obtained by polymerizing methyl methacrylate alone.
  • the methyl methacrylate resin may be a copolymer of methyl methacrylate and a monomer copolymerizable therewith.
  • Monomers that can be copolymerized with methyl methacrylate include, for example, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, 2-ethylhexyl methacrylate, and 2-hydroxyethyl methacrylate.
  • Methacrylic acid esters other than methyl methacrylate acrylic acid such as methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate Esters; unsaturated acids such as methacrylic acid and acrylic acid; halogenated styrenes such as chlorostyrene and bromostyrene; alkyls such as vinyltoluene and ⁇ -methylstyrene Substituted styrenes such as Ren like; acrylonitrile, methacrylonitrile, maleic anhydride, phenyl maleimide and cyclohexyl maleimide. Each monomer may be used alone or in combination with one or more other monomers.
  • the styrene resin is a polymer containing 50% by weight or more of a styrene monofunctional monomer unit, and may be a homopolymer of a styrene monofunctional monomer or a styrene monofunctional monomer. And a copolymer of a monofunctional monomer copolymerizable therewith.
  • the styrene monofunctional monomer is a compound having a styrene skeleton and one double bond capable of radical polymerization in the molecule.
  • styrene monofunctional monomer examples include styrene; halogenated styrenes such as chlorostyrene and bromostyrene; substituted styrenes such as alkyl styrenes such as vinyltoluene and ⁇ -methylstyrene.
  • a monofunctional monomer copolymerizable with a styrene monofunctional monomer is a compound copolymerizable with a styrene monofunctional monomer having one radical-polymerizable double bond in the molecule.
  • Examples of the monofunctional monomer copolymerizable with the styrenic monofunctional monomer include methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, 2-ethylhexyl methacrylate.
  • methacrylates such as 2-hydroxyethyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate, and 2-hydroxyethyl acrylate And acrylonitrile and the like, and methacrylic esters such as methyl methacrylate are preferably used.
  • Each monofunctional monomer is used alone or in combination with one or more other monomers.
  • the aromatic polycarbonate resin is usually a resin obtained by reacting a dihydric phenol and a carbonate precursor by an interfacial polycondensation method or a melt transesterification method; a resin obtained by polymerizing a carbonate prepolymer by a solid phase transesterification method Or a resin obtained by polymerizing a cyclic carbonate compound by a ring-opening polymerization method.
  • dihydric phenol examples include hydroquinone, resorcinol, 4,4′-dihydroxydiphenyl, bis (4-hydroxyphenyl) methane, bis ⁇ (4-hydroxy-3,5-dimethyl) phenyl ⁇ methane, 1,2-bis (4-hydroxyphenyl) ethane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 2,2-bis (4-hydroxyphenyl) propane (commonly called bisphenol A), 2,2 -Bis ⁇ (4-hydroxy-3-methyl) phenyl ⁇ propane, 2,2-bis ⁇ (4-hydroxy-3,5-dimethyl) phenyl ⁇ propane, 2,2-bis ⁇ (4-hydroxy-3, 5-dibromo) phenyl ⁇ propane, 2,2-bis ⁇ (3-isopropyl-4-hydroxy) phenyl ⁇ propane, 2,2-bis ⁇ 4-hydroxy-3-phenyl) phenyl ⁇ propane, 2,2-bis (4-hydroxyphenyl) butane,
  • Aromatic polycarbonate resin obtained by using at least one bisphenol selected from the group consisting of) -3,3,5-trimethylcyclohexane and ⁇ , ⁇ '-bis (4-hydroxyphenyl) -m-diisopropylbenzene
  • an aromatic polycarbonate resin using only bisphenol A as the dihydric phenol, and 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and bisphenol A, 2,2-bis ⁇ (4-hydroxy-3-methyl) phenyl ⁇ propane and ⁇ , ⁇
  • carbonate precursor carbonyl halides, carbonate esters, haloformates, and the like are used, and specific examples include phosgene, diphenyl carbonate, and dihaloformates of dihydric phenols.
  • a resin containing an alicyclic structure-containing ethylenically unsaturated monomer unit that contains an alicyclic structure in the repeating unit of the polymer.
  • the resin containing an alicyclic structure-containing ethylenically unsaturated monomer unit include a norbornene polymer and a vinyl alicyclic hydrocarbon polymer.
  • the alicyclic structure may be contained in either the main chain or the side chain of the polymer, or may be contained in both. From the viewpoint of light transmittance, those containing an alicyclic structure in the main chain are preferred.
  • resins containing an alicyclic structure-containing ethylenically unsaturated monomer unit include norbornene polymers, monocyclic olefin polymers, cyclic conjugated diene polymers, and vinyl alicyclic hydrocarbons. System polymers, and hydrogenated products thereof. Among these, from the viewpoint of light transmittance, a norbornene polymer hydrogenated product, a vinyl alicyclic hydrocarbon polymer and a hydride thereof are preferable, and a norbornene polymer hydrogenated product is more preferable.
  • the transparent resin (a) and the transparent resins (b1) and (b2) a resin composition obtained by adding a rubbery polymer to the methyl methacrylate resin or a rubbery heavy resin to the styrene resin. It is also preferable to use a resin composition that can be obtained by adding coalescence. The addition of the rubbery polymer makes it difficult to break during film formation, and the yield can be improved. Moreover, since it is hard to break at the time of coating and bonding, there is an advantage that handling becomes easy.
  • the rubber-like polymer can be contained in either the transparent resin (a), the transparent resin (b1) or (b2), or two or more resins.
  • the amount of the rubber-like polymer added is preferably 100 parts by weight or less, more preferably 3 to 100 parts by weight with respect to 100 parts by weight of the methyl methacrylate resin or the styrene resin. 50 parts by weight.
  • the addition amount of the rubbery polymer exceeds 100 parts by weight with respect to 100 parts by weight of the methyl methacrylate resin or styrene resin, the rigidity of the light diffusing laminated resin film tends to be lowered.
  • the rubber-like polymer examples include an acrylic multilayer structure polymer and a graft copolymer obtained by graft-polymerizing an ethylenically unsaturated monomer to a rubber component.
  • the acrylic multilayer structure polymer is a multilayer structure having a rubber elastic layer or an elastomer layer and a hard layer as the outermost layer.
  • the rubber elastic layer or the elastomer layer may be, for example, 20 to 60% by weight of the whole.
  • the acrylic multilayer structure polymer may have a structure further including a hard layer as the innermost layer.
  • the rubber elastic layer or the elastomer layer is a layer made of an acrylic polymer having a glass transition point (Tg) of less than 25 ° C.
  • Acrylic polymers that form rubber elastic layers or elastomer layers include lower alkyl acrylate, lower alkyl methacrylate, lower alkoxy acrylate, cyanoethyl acrylate, acrylamide, hydroxy lower alkyl acrylate, hydroxy lower alkyl methacrylate, acrylic acid, methacrylic acid, etc.
  • the hard layer is a layer made of an acrylic polymer having a Tg of 25 ° C. or higher.
  • an acrylic polymer forming the hard layer a homopolymer of alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms, and the alkyl methacrylate as a main component, other alkyl methacrylate, alkyl acrylate, styrene, Examples thereof include a copolymer copolymerized with a copolymerizable monofunctional monomer such as substituted styrene, acrylonitrile, and methacrylonitrile.
  • the acrylic polymer forming the hard layer may be a crosslinked polymer obtained by adding a polyfunctional monomer to the monomer and polymerizing it.
  • examples of such an acrylic polymer include those described in JP-B-55-27576, JP-A-6-80739, and JP-A-49-23292.
  • a graft copolymer obtained by graft-polymerizing an ethylenically unsaturated monomer to a rubber component contains 5 to 80% by weight of monomer units derived from the rubber component (therefore, 95% of ethylenically unsaturated monomer units are contained). It is preferably contained in an amount of about 20% by weight.
  • rubber components include diene rubbers such as polybutadiene rubber, acrylonitrile / butadiene copolymer rubber, and styrene / butadiene copolymer rubber; acrylic rubbers such as polybutyl acrylate, polypropyl acrylate, and poly-2-ethylhexyl acrylate; and Ethylene / propylene / non-conjugated diene rubber can be used.
  • the rubber component may be a combination of two or more.
  • ethylenically unsaturated monomer examples include styrene, acrylonitrile, and alkyl (meth) acrylate, and among them, acrylic unsaturated monomers such as acrylonitrile and alkyl (meth) acrylate are preferably used.
  • acrylic unsaturated monomers such as acrylonitrile and alkyl (meth) acrylate are preferably used.
  • graft copolymers those described in JP-A-55-147514 and JP-B-47-9740 can be used.
  • the transparent resin (a) since it has high transparency, a methyl methacrylate resin, a resin composition containing a methyl methacrylate resin containing a rubbery polymer, a styrene resin, and styrene A resin composition in which a rubber-like polymer is contained in a resin and an aromatic polycarbonate resin can be preferably used. Further, among the transparent resins (b1) and (b2), among the above, for reasons of high transparency and difficulty in coloring diffused light, it is difficult to color the methyl methacrylate resin or the methyl methacrylate resin.
  • a resin composition containing a coalescence, a styrene resin, an aromatic polycarbonate resin, or a resin containing an alicyclic structure-containing ethylenically unsaturated monomer unit can be preferably used.
  • the transparent resin (a) and the transparent resins (b1) and (b2) may be used alone or in combination with one or more of these preferred resins.
  • the light diffusing agent dispersed in the resin layer (A)
  • inorganic or organic transparent particles having a refractive index different from that of the transparent resin (a) are used in order to impart a light diffusing function to the resin layer (A).
  • the light diffusing agent include calcium carbonate, barium sulfate, titanium oxide, aluminum hydroxide, silica, glass, talc, mica, white carbon, magnesium oxide, zinc oxide, and other inorganic particles, and fatty acids in these inorganic particles.
  • crosslinked resin particles refer to resin particles having a gel fraction of 10% or more when dissolved in acetone
  • high molecular weight resin particles are weight average molecular weights ( Mw) refers to resin particles having 500,000 to 5,000,000.
  • High molecular weight styrene resin particles are high molecular weight resin particles obtained by polymerizing styrene monomers, or contain 50% by weight or more of styrene monomer units, and can be radically polymerized with styrene monomers. It means high molecular weight resin particles obtained by polymerizing a monomer having one double bond in the molecule.
  • Cross-linked styrene resin particles are cross-linked resin particles obtained by polymerizing a styrene monomer and a monomer having at least two radically polymerizable double bonds in the molecule, or styrene-based single particles.
  • Containing at least 50% by weight of a monomer unit, a styrene monomer, a monomer having one radical polymerizable double bond in the molecule, and at least two radical polymerizable double bonds in the molecule It means a crosslinked resin particle obtained by polymerizing a monomer having the same.
  • the styrene monomer is styrene or a derivative thereof.
  • Styrene derivatives include, but are not limited to, halogenated styrenes such as chlorostyrene and bromostyrene; and alkyl-substituted styrenes such as vinyltoluene and ⁇ -methylstyrene. Two or more styrenic monomers may be used in combination.
  • the monomer having one radically polymerizable double bond in the molecule that can constitute the crosslinked or high molecular weight styrene resin particles is not particularly limited as long as it is other than the styrene monomer component.
  • Methacrylates such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, 2-ethylhexyl methacrylate and 2-hydroxyethyl methacrylate; methyl acrylate, acrylic acid Acrylic esters such as ethyl, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate; and acrylonitrile.
  • alkyl methacrylates such as methyl methacrylate are particularly preferable.
  • the monomer having at least two radically polymerizable double bonds capable of constituting the crosslinked or high molecular weight styrenic resin particles in the molecule is other than a conjugated diene, and the styrenic monomer and / or There is no particular limitation as long as the polymer is copolymerizable with a monomer having one radical-polymerizable double bond in the molecule.
  • Examples of such monomers include alkyl diol di (meth) acrylates such as 1,4-butanediol di (meth) acrylate and neopentyl glycol di (meth) acrylate; ethylene glycol di (meth) acrylate, Alkylene glycol di (meth) acrylates such as diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate and tetrapropylene glycol di (meth) acrylate; such as divinylbenzene and diallyl phthalate Aromatic polyfunctional compounds; (meth) acrylates of polyhydric alcohols such as trimethylolpropane tri (meth) acrylate and pentaerythritol tetra (meth) acrylate And the like. Two or more of these monomers may be used in combination.
  • the high molecular weight acrylic resin particles are high molecular weight resin particles obtained by polymerizing an acrylic monomer, or contain 50% by weight or more of an acrylic monomer unit. It means high molecular weight resin particles obtained by polymerizing a monomer having one polymerizable double bond in the molecule.
  • Cross-linked acrylic resin particles are cross-linked resin particles obtained by polymerizing acrylic monomers and monomers having at least two double bonds capable of radical polymerization in the molecule, or acrylic single particles. Containing at least 50% by weight of a monomer unit, an acrylic monomer, a monomer having one radical polymerizable double bond in the molecule, and at least two radical polymerizable double bonds in the molecule It means a crosslinked resin particle obtained by polymerizing a monomer having the same.
  • acrylic monomer examples include methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, methyl acrylate, Examples include ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, methacrylic acid, and acrylic acid. Two or more of these monomers may be used in combination.
  • the monomer having one radical polymerizable double bond in the molecule that can constitute the crosslinked or high molecular weight acrylic resin particles is not particularly limited as long as it is other than the acrylic monomer component.
  • styrene and its derivatives can be mentioned.
  • the styrene derivative include halogenated styrene such as chlorostyrene and bromostyrene; alkyl-substituted styrene such as vinyltoluene and ⁇ -methylstyrene. Of these, styrene is particularly preferable. Two or more of these monomers may be used in combination.
  • the monomer having at least two radically polymerizable double bonds capable of constituting the crosslinked or high molecular weight acrylic resin particles in the molecule is other than a conjugated diene, and the acrylic monomer and / or
  • the polymer is not particularly limited as long as it is a polymer copolymerizable with a monomer having one radical-polymerizable double bond in the molecule, and the above-described monomers can be given as specific examples.
  • Both crosslinked or high molecular weight styrene resin particles and acrylic resin particles can be obtained by polymerizing the above components by a method such as a suspension polymerization method, a micro suspension polymerization method, an emulsion polymerization method, or a dispersion polymerization method. it can.
  • the crosslinked siloxane-based resin (crosslinked siloxane-based polymer) constituting the crosslinked siloxane resin particles is generally referred to as silicone rubber or silicone resin and is solid at room temperature.
  • Siloxane polymers are produced mainly by hydrolysis and condensation of chlorosilanes.
  • a (crosslinked) siloxane-based polymer can be obtained by hydrolyzing and condensing chlorosilanes represented by dimethyldichlorosilane, diphenyldichlorosilane, phenylmethyldichlorosilane, methyltrichlorosilane, and phenyltrichlorosilane.
  • the siloxane polymers are obtained by converting these (crosslinked) siloxane polymers into benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, p-chlorobenzoyl peroxide, dicumyl peroxide, di-toxide peroxide.
  • -Crosslinking with peroxides such as butyl, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, or introducing silanol groups at the end of polysiloxane compounds, condensation crosslinking with alkoxysilanes Can also be manufactured.
  • the crosslinked siloxane-based resin preferably used in the present invention include a crosslinked siloxane-based polymer in which 2 to 3 organic groups are bonded per silicon atom.
  • crosslinked siloxane-based resin in the form of particles, a method of mechanically pulverizing the above-mentioned crosslinked siloxane-based polymer, as described in JP-A-59-68333, a specific linear organosiloxane block is used.
  • a method for obtaining spherical particles by curing a curable polymer or a curable polymer composition contained therein in a sprayed state, and a specific alkyltrialkoxysilane or a compound thereof as described in JP-A-60-13813 A method of hydrolyzing and condensing the partially hydrolyzed condensate in an aqueous solution of ammonia or amines to form spherical particles can be used.
  • the refractive index of the light diffusing agent used in the present invention is preferably such that the absolute value R of the difference from the refractive index of the transparent resin (a) as the substrate is 0.01 to 0.13, A more preferred range is 01 to 0.05. This is because when R is within this range, the balance between light transmittance and light diffusibility is improved. Therefore, it is preferable to select a combination of the constituent materials of the transparent resin (a) and the light diffusing agent so that R is within this range.
  • the refractive index of the crosslinked or high molecular weight styrene resin particles varies depending on the constituent components of the styrene polymer constituting the crosslinked or high molecular weight styrene resin particles, but is usually about 1.53 to 1.61. Generally, the refractive index tends to increase as the content of the monomer having a phenyl group increases or as the amount of halogenated monomer increases.
  • the refractive index of the crosslinked or high molecular weight acrylic resin particles varies depending on the constituent components of the acrylic polymer constituting the crosslinked polymer resin particles, but is usually about 1.46 to 1.55.
  • the refractive index tends to increase as the content of the monomer having a phenyl group increases and as the amount of the halogenated monomer increases.
  • the refractive index of the crosslinked siloxane-based resin particles varies depending on the constituent components of the crosslinked siloxane-based polymer constituting the crosslinked siloxane-based resin particles, but is usually about 1.40 to 1.47. In general, the higher the phenyl group content in the crosslinked siloxane-based polymer and the more organic groups directly connected to silicon atoms, the higher the refractive index.
  • the particle size of the light diffusing agent used in the present invention is 1 to 20 ⁇ m in weight average, and preferably 2 to 15 ⁇ m. If the weight average particle diameter is less than 1 ⁇ m, the see-through tends to occur. Moreover, when a weight average particle diameter exceeds 20 micrometers, there exists a tendency for the surface smoothness of the 1st and 2nd transparent resin layer (B) in a light diffusable laminated resin film to become inadequate. That is, when a light diffusing agent having a weight average particle diameter exceeding 20 ⁇ m is used for the resin layer (A), the first surface formed on the resin layer (A) is affected by the surface irregularity shape of the resin layer (A).
  • the smoothness of the surface of the second transparent resin layer (B) decreases, and the first transparent resin layer (B) and the second transparent resin layer ( B) may not be appropriately processed such as bonding or coating to the surface, and as a result, sufficient characteristics may not be imparted by the processing.
  • the concentration X [(weight of light diffusing agent) / (total weight of constituent material of resin layer (A)) ⁇ 100) in the resin layer (A) is 5% by weight or more and 40% by weight or less. It is preferably 5% by weight or more and 30% by weight or less, more preferably 7% by weight or more and 20% by weight or less.
  • concentration X of the light diffusing agent is less than 5% by weight, the transparency tends to occur.
  • the concentration X of the light diffusing agent exceeds 40% by weight, the surface smoothness of the first and second transparent resin layers (B) tends to be insufficient, and the resin layer (A) becomes brittle. It tends to be difficult to process.
  • a general method can be adopted, for example, a method of adding the transparent resin (a) and the light diffusing agent to an extruder, and melt-kneading, etc. Can be used.
  • a UV absorber, an antioxidant, a flame retardant, and a colorant such as a dye and a pigment may be added to the resin layer (A).
  • the light diffusing laminated resin film of the present invention includes a resin layer (A) having the above-described configuration, and first and second transparent resin layers (B) disposed so as to sandwich the resin layer (A).
  • the first transparent resin layer (B), the resin layer (A), and the second transparent resin layer (B) have a three-layer structure in this order, and the three-layer structure is constructed by coextrusion molding.
  • the unevenness on one surface of the resin layer (A) is filled with the second transparent resin layer (B), whereby the first transparent resin layer ( Since the surface of B) (the surface opposite to the resin layer (A) side) is not affected (the same applies to the surface of the second transparent resin layer (B)), both surfaces have smooth light.
  • the transparent resin layer (B) is disposed only on one side, the transparent resin layer (B) is formed on both sides because it can be affected by the surface irregularities of the exposed resin layer (A) during coextrusion molding. Compared to the case of providing the surface smoothness of the transparent resin layer (B), it tends to be difficult to obtain.
  • the thickness of the light diffusing laminated resin film of the present invention is 30 to 500 ⁇ m, preferably 40 to 200 ⁇ m, more preferably 50 to 150 ⁇ m. If the thickness is less than 30 ⁇ m, the surface smoothness of the first and second transparent resin layers (B) tends to be lost, and if it exceeds 500 ⁇ m, it becomes difficult to handle as a film.
  • the thickness Y ( ⁇ m) of the first transparent resin layer (B) and the thickness Y ′ ( ⁇ m) of the second transparent resin layer (B) are represented by the following formulas (1) and (2), respectively. Satisfy the indicated relationship.
  • X + 8 ⁇ Y ′ (2) Forming a laminated film obtained by coextrusion molding using an elastic roll by controlling the thicknesses Y and Y ′ of the first and second transparent resin layers (B) so as to satisfy the above relational expression.
  • the above formulas (1) and (2) represent a light diffusing laminated resin film in which the surface irregularities of the resin layer (A) are filled and the influence of the surface irregularities is eliminated, and the smoothness of both surfaces is improved.
  • the thicknesses Y and Y ′ of the first and second transparent resin layers (B) should be a certain value or more in order to obtain them. It was found that this “value above a certain value” varies depending on the concentration X (wt%) of the light diffusing agent contained in the resin layer (A).
  • the thicknesses Y and Y ′ of the first and second transparent resin layers (B) are set to (X + 8) or more. It has been found necessary to do.
  • arithmetic mean roughness R a conforming to -2001 is preferably 0 ⁇ 0.5 [mu] m.
  • transparent resin layer (B) arithmetic mean roughness R a of the surface within this range the workability of the surface becomes better, processability (in particular, light scattering characteristics) optical properties before and after the change in Can be further reduced.
  • the Ra values of the surfaces of both the first and second transparent resin layers (B) are 0 to 0.5 ⁇ m. Thereby, both of a light diffusable laminated resin film can be utilized effectively.
  • the maximum roughness according to JIS B0601-2001 on the surface of the first transparent resin layer (B) and / or the second transparent resin layer (B) on the side opposite to the resin layer (A) side ( R z) is preferably 0 ⁇ 2.5 [mu] m, the ratio R a of R z (R z / R a ) is more preferably in the range of 1-5.
  • a coextrusion molding method is used for the production of the light diffusing laminated resin film of the present invention. That is, the constituent components of the resin layer (A) (transparent resin (a), light diffusing agent and additives added as necessary) and the constituent components of the first transparent resin layer (B) (transparent resin ( b1) and the additive added as necessary) and the constituent components of the second transparent resin layer (B) (transparent resin (b2) and additive added as necessary) are different from each other.
  • the extruder a single screw extruder, a twin screw extruder, or the like can be used.
  • the die a feed block die, a multi-manifold die, or the like can be used.
  • the light diffusing laminated resin film of the present invention produced by coextrusion molding is different from the laminated resin film laminated through, for example, an adhesive or a pressure-sensitive adhesive, and one of the resin layers (A).
  • the surface, the surface of the first transparent resin layer (B), the other surface of the resin layer (A), and the surface of the second transparent resin layer (B) are laminated in direct contact.
  • an elastic roll is used as at least one of the cooling rolls sandwiching the laminated film.
  • At least one side of transparent resin is formed by sandwiching a co-extruded laminated film between cooling rolls, at least one of which is an elastic roll, and forming by pressing at least one side of the laminated film in contact with the elastic roll.
  • a light diffusing laminated resin film excellent in surface smoothness of the layer (B) can be obtained. If both cooling rolls sandwiching the laminated film are elastic rolls, a light diffusing laminated resin film excellent in surface smoothness of the first and second transparent resin layers (B) can be obtained.
  • the present invention it is possible to obtain a light diffusing laminated resin film in which the arithmetic average roughness Ra and the maximum roughness Rz of the transparent resin layer (B) surface are controlled within the above ranges, For example, it is possible to suppress or prevent the generation of a relatively large recess having an order of several hundred ⁇ m in diameter.
  • Such relatively large dents that may be formed on the surface of the first and / or second transparent resin layer (B) may not be evaluated by measurement of the arithmetic average roughness Ra and the maximum roughness Rz.
  • the presence or absence of the dent can be confirmed using, for example, a confocal microscope or visually.
  • FIG. 7 is a schematic cross-sectional view showing a specific example of a metal elastic roll that can be used in the present invention.
  • the metal elastic roll in FIG. 7A includes a metal (for example, stainless steel, etc.) thin film 701a that forms the outer periphery of the roll, and a shaft roll 702a disposed at the axial center of the metal thin film 701a.
  • a fluid space 703 is formed between the metal thin film 701a and the shaft roll 702a for circulating a fluid such as water or oil.
  • the 7B includes a metal (for example, stainless steel) thin film 701b that forms the outer periphery of the roll, and a shaft roll 702b that is formed in contact with the inner periphery of the metal thin film 701a.
  • the shaft roll 702b is made of an elastic material such as a rubber roll. Since the outer peripheral portion (metal thin film) of such a metal elastic roll is in contact with a space for circulating a fluid or a shaft roll made of a relatively soft material, it can be elastically deformed.
  • the configuration of the roll unit itself may be a conventionally known one.
  • the roll unit may consist of two cooling rolls arranged in a row, may consist of three cooling rolls arranged in a row, or may be an inverted L-shape. It may consist of three or more cooling rolls arranged.
  • the roll unit is composed of three or more cooling rolls, at least one of a pair of cooling rolls that cools and molds the coextruded laminated film first is an elastic roll.
  • the elastic roll preferably has a mirror-finished surface (surface that contacts the laminated film). Thereby, the surface smoothness of the 1st and / or 2nd transparent resin layer (B) can be improved more.
  • FIG. 1 is a schematic cross-sectional view showing a preferred example of the antiglare film of the present invention.
  • the antiglare film shown in FIG. 1 includes a light diffusing laminated resin film 101 and a hard coat layer 102 having a fine concavo-convex shape laminated on the surface of the light diffusing laminated resin film 101.
  • the light diffusing laminated resin film 101 includes a first transparent resin layer (B) 103a and a second transparent resin layer (B) 103b, and a resin layer (between these two transparent resin layers (B) ( A) It consists of a three-layer structure with 104.
  • the light diffusing agent 105 is dispersed in the resin layer (A) 104.
  • the invasion of bubbles into the interface between the light diffusing laminated resin film and the hard coat layer and the warpage of the antiglare film can be eliminated or reduced.
  • the antiglare film of the present invention comprises a light diffusing laminated resin film and a hard coat layer having a fine irregular surface laminated on the surface of the light diffusing laminated resin film.
  • the light diffusing laminated resin film is provided with an internal scattering function, while the internal scattering function is eliminated or almost eliminated from the hard coat layer, and mainly the surface reflection characteristics are imparted. This makes it possible to control the internal scattering characteristics and the reflection characteristics independently, while preventing the deterioration of visibility due to whitishness while exhibiting excellent anti-glare performance, and for high-definition image display devices.
  • the antiglare film can exhibit high contrast without causing glare.
  • the internal haze of the light diffusing laminated resin film used for the antiglare film is preferably 5% or more, more preferably 10% or more. By setting the internal haze to 5% or more, glare can be eliminated, and by setting it to 10% or more, glare can be more effectively eliminated.
  • the internal haze of the light diffusing laminated resin film is 30% or less. If the internal haze of the light diffusing laminated resin film exceeds 30%, when applied to an image display device, the screen becomes dark as a result, and the visibility tends to be impaired. In order to ensure sufficient brightness, the internal haze is preferably 20% or less.
  • the internal haze of the hard coat layer having a fine uneven shape is It is essentially unnecessary, and in order to independently control the internal scattering characteristics and the reflection characteristics, it is preferable that the internal haze of the hard coat layer is substantially zero.
  • the “inner haze” of the light diffusing laminated resin film refers to bonding one surface of the light diffusing laminated resin film to a glass substrate using an optically transparent adhesive or glycerin, and then A light diffusing laminated resin film in which a triacetyl cellulose film having a haze of approximately 0 is bonded to one surface using an optically transparent adhesive or glycerin and sandwiched between the glass substrate and the triacetyl cellulose film , Defined as haze measured according to the method shown in JIS K 7136.
  • the internal haze of the light diffusing laminated resin film is obtained by bonding one surface of the light diffusing laminated resin film to a glass substrate using an optically transparent adhesive, and then the other surface.
  • a light diffusing laminated resin film which is bonded to a glass substrate and a triacetyl cellulose film with a triacetyl cellulose film having a haze of almost 0 using an optically transparent adhesive, is added to JIS K 7136. It can be measured using a compliant haze meter (for example, a haze meter “HM-150” manufactured by Murakami Color Research Laboratory Co., Ltd.).
  • the hard coat layer having a fine unevenness on the surface has a surface haze of 0.5% to 15% and an internal haze of 2% or less.
  • the internal scattering characteristics are mainly imparted to the light diffusing laminated resin film, so that the internal haze of the hard coat layer is Is 2% or less, preferably substantially 0%.
  • the haze of the hard coat layer substantially 0%, the haze of the hard coat layer substantially consists of only the surface haze.
  • the surface haze of the hard coat layer is preferably 15% or less from the viewpoint of suppressing whitening, and more preferably 5% or less for more effectively suppressing whitening. However, when it is less than 0.5%, the antiglare property tends not to be exhibited.
  • the surface haze and internal haze of the hard coat layer are measured as follows. That is, first, after forming a hard coat layer on a triacetyl cellulose film having a haze of approximately 0%, the laminated film and the glass substrate are bonded with a transparent adhesive so that the triacetyl cellulose film side becomes a bonding surface. The haze is measured according to JIS K 7136. The haze corresponds to the haze of the entire hard coat layer. Next, a triacetyl cellulose film having a haze of approximately 0% is bonded to the uneven surface of the hard coat layer using glycerin, and the haze is measured again in accordance with JIS K 7136.
  • the haze can be regarded as “internal haze” of the hard coat layer because the surface haze caused by the surface irregularities is almost canceled by the triacetyl cellulose film bonded onto the surface irregularities. Therefore, the “surface haze” of the hard coat layer is obtained from the following formula (3).
  • Surface haze Overall haze-Internal haze (3)
  • the method for producing the hard coat layer provided with the surface irregularities satisfying the optical characteristics described above is not particularly limited. For example, a resin solution in which a filler is dispersed is applied on a light diffusing laminated resin film, and the coating film thickness is applied. The method of forming random irregularities by exposing the filler to the coating film surface by adjusting the surface, and the embossing method of transferring the irregular surface shape to a transparent resin film using a mold having surface irregularities it can.
  • the ratio of the refractive index of the filler to the refractive index of the resin (hard coat resin) serving as the base material of the hard coat layer is about 1, or smaller than the wavelength of visible light (about 100 nm or less).
  • the surface irregularities may be formed by dispersing the porous silica secondary particles to be dispersed in the hard coat resin.
  • the hard coat resin often exhibits a refractive index of around 1.50.
  • polymethyl methacrylate beads (refractive index 1.49) or methyl methacrylate / styrene copolymer is used as a filler.
  • Combined resin beads (refractive index 1.50 to 1.59), polyethylene beads (refractive index 1.53), etc. may be appropriately selected and used.
  • an ultraviolet curable resin for dispersing the filler
  • a thermosetting resin for dispersing the filler
  • an electron beam curable resin for dispersing the filler
  • an ultraviolet curable resin is preferable from the viewpoint of productivity and hardness. used.
  • a commercially available product can be used as the ultraviolet curable resin.
  • one or more polyfunctional acrylates such as trimethylolpropane triacrylate and pentaerythritol tetraacrylate, and “Irgacure 907”, “Irgacure 184” (above, manufactured by Ciba Specialty Chemicals), “
  • a mixture with a photopolymerization initiator such as Lucillin TPO (manufactured by BASF) can be used as an ultraviolet curable resin.
  • Lucillin TPO manufactured by BASF
  • the resin composition is applied to the light diffusing laminated resin film and irradiated with ultraviolet rays, so that the hard coat resin is applied.
  • a hard coat layer in which filler is dispersed can be formed.
  • the shape of the mold may be transferred to a transparent resin film using a mold having a fine uneven shape.
  • the UV embossing method using an ultraviolet curable resin is preferable for the transfer to the mold-shaped film.
  • an ultraviolet curable resin layer is formed on the surface of a light diffusing laminated resin film, and the ultraviolet curable resin layer is cured by pressing the ultraviolet curable resin layer against the concave and convex surface of the mold. It is transferred to the curable resin layer.
  • an ultraviolet curable resin is coated on the light diffusing laminated resin film, and the coated ultraviolet curable resin is in close contact with the uneven surface of the mold, from the light diffusing laminated resin film side.
  • UV-curing resin is cured by irradiating UV light, and then the mold shape is UV-cured by peeling the light-diffusing laminated resin film on which the cured UV-curing resin layer is formed from the mold. Transfer to a functional resin.
  • the kind of ultraviolet curable resin is not particularly limited. Further, instead of the ultraviolet curable resin, a visible light curable resin that can be cured with visible light having a wavelength longer than that of ultraviolet light may be used by appropriately selecting a photopolymerization initiator.
  • the thickness of the hard coat layer is not particularly limited, but is preferably 2 ⁇ m or more and 20 ⁇ m or less. If the thickness of the hard coat layer is less than 2 ⁇ m, sufficient hardness cannot be obtained and tends to be easily scratched. If the thickness is greater than 20 ⁇ m, the film tends to break or the film curls due to curing shrinkage of the hard coat layer. As a result, productivity tends to decrease.
  • the antiglare film of the present invention which is a laminate of the light diffusing laminated resin film and the hard coat layer as described above is a hard coat layer when light is incident at an incident angle of 20 ° from the light diffusing laminated resin film side.
  • the relative scattered light intensity T (20) observed in the side normal direction shows a value of 0.0001% or more and 0.0006% or less, and light is incident at an incident angle of 30 ° from the light diffusing laminated resin film side.
  • the relative scattered light intensity T (30) observed in the normal direction of the hard coat layer shows a value of 0.00004% or more and 0.0002% or less.
  • FIG. 2 shows a case where light is incident from the light diffusing laminated resin film side (the side opposite to the uneven surface of the hard coat layer) and the scattered light intensity is measured in the normal direction of the hard coat layer side (the uneven surface side).
  • FIG. 3 is a perspective view schematically showing a light incident direction and a transmitted scattered light intensity measurement direction.
  • the hard coat layer side with respect to light 203 incident at an angle ⁇ (incident angle) from normal line 202 of the antiglare film on the light diffusing laminated resin film side of antiglare film 201 The intensity of the transmitted scattered light 204 transmitted in the direction of the normal 202 is measured, and a value obtained by dividing the transmitted scattered light intensity by the light intensity of the light source is defined as a relative scattered light intensity T ( ⁇ ).
  • T (20) is a value obtained by dividing the intensity of the transmitted scattered light 204 observed in the direction of the normal 202 on the hard coat layer side by the light intensity of the light source.
  • the light 203 is incident such that the direction of the light 203 incident from the light diffusing laminated resin film side and the normal line 202 of the antiglare film are on the same plane (plane 209 in FIG. 2).
  • the relative scattered light intensity T (30) at 30 ° incidence is less than 0.00004%, the scattering effect is low, and glare occurs when applied to a high-definition image display device.
  • the antiglare film is applied to a liquid crystal display that is not self-luminous, the effect of increasing the brightness due to scattering caused by light leakage during black display is large, and therefore the relative scattered light intensities T (20) and T (30) are high. If it exceeds the preferable range, the contrast is remarkably lowered and the visibility is impaired.
  • FIG. 3 shows the relative scattered light intensity (logarithmic scale) measured by changing the incident angle ⁇ from the light diffusing laminated resin film side of the antiglare film of the present invention (antiglare film 201 in FIG. 2). It is an example of the graph plotted with respect to.
  • Such a graph representing the relationship between the incident angle and the relative scattered light intensity, or the relative scattered light intensity for each incident angle read therefrom may be referred to as a transmission scattering profile.
  • the relative scattered light intensity has a peak at an incident angle of 0 °, and the scattered light intensity tends to decrease as the angle from the normal direction of the incident light 203 increases.
  • the transmission / scattering profile usually appears symmetrically about the incident angle of 0 °.
  • the relative scattered light intensity T (0) at 0 ° incidence shows a peak at about 15%
  • the relative scattered light intensity T (20) at 20 ° incidence is about
  • the relative scattered light intensity T (30) at 0.0003% and 30 ° incidence is about 0.00006%.
  • a detector In measuring the relative scattered light intensity of the antiglare film, it is necessary to accurately measure the relative scattered light intensity of 0.001% or less. Therefore, it is effective to use a detector with a wide dynamic range.
  • a detector for example, a commercially available optical power meter can be used, and an aperture is provided in front of the detector of this optical power meter so that the angle at which the antiglare film is viewed is 2 °. Measurements can be made using an angular photometer. Visible light of 380 to 780 nm can be used as incident light, and a collimated light emitted from a light source such as a halogen lamp can be used as a measurement light source, or a parallel light source using a monochromatic light source such as a laser. Higher ones may be used. Moreover, in order to prevent the curvature of a film, it is preferable to use it for a measurement, after bonding to a glass substrate so that an uneven surface may become the surface using an optically transparent adhesive.
  • the relative scattered light intensities T (20) and T (30) defined in the present invention are measured as follows.
  • the antiglare film is bonded to a glass substrate so that the uneven surface is the surface, and parallel light from a He—Ne laser is irradiated from the direction inclined at a predetermined angle with respect to the film normal on the glass surface side.
  • the transmitted scattered light intensity in the film normal direction is measured on the uneven surface side of the antiglare film.
  • “3292 03 optical power sensor” and “3292 optical power meter” manufactured by Yokogawa Electric Corporation are used for both T (20) and T (30).
  • FIG. 4 is a diagram showing the relationship between the relative scattered light intensities T (20) and T (30) and the contrast.
  • T (20) exceeds 0.0006% or T (30) exceeds 0.0002%
  • the contrast is reduced by 10% or more, and the visibility is impaired. It turns out that there is a tendency.
  • the contrast was measured by the following procedure. First, the polarizing plate on the back side and the display surface side is peeled off from a commercially available liquid crystal television (“LC-42GX1W” manufactured by Sharp Corporation). A polarizing plate “Sumikaran SRDB31E” manufactured by Chemical Co., Ltd. was bonded via an adhesive so that each absorption axis coincided with the absorption axis of the original polarizing plate.
  • the anti-glare film which has the structure similar to the anti-glare film which concerns on this invention which shows various scattered light intensity
  • the liquid crystal television thus obtained was activated in a dark room, and using a luminance meter “BM5A” manufactured by Topcon Corporation, the luminance in the black display state and the white display state was measured, and the contrast was calculated.
  • the contrast is represented by the ratio of the luminance in the white display state to the luminance in the black display state.
  • the antiglare film of the present invention has a reflectance R (30) at a reflection angle of 30 ° of 0.05% or more and 2% or less when light is incident from the hard coat layer side at an incident angle of 30 °.
  • the reflectance R (40) at a reflection angle of 40 ° is 0.0001% or more and 0.005% or less
  • the reflectance R (50) at a reflection angle of 50 ° is 0.00001% or more and 0.0005% or less. It is preferable.
  • FIG. 5 is a perspective view schematically showing an incident direction and a reflection direction of light from the hard coat layer side with respect to the antiglare film when the reflectance is obtained.
  • the direction of the reflection angle of 30 ° that is, the regular reflection direction with respect to the light 505 incident at an angle of 30 ° from the normal line 502 of the antiglare film on the hard coat layer side of the antiglare film 501.
  • the reflectance (that is, regular reflectance) of the reflected light to 506 is R (30).
  • the direction of reflected light when measuring the reflectance is within the plane 509 including the direction of the incident light 505 and the normal line 502. To do.
  • the regular reflectance R (30) exceeds 2%, a sufficient antiglare function cannot be obtained, and the visibility tends to decrease. On the other hand, even if the regular reflectance R (30) is too small, since it tends to cause whitening, it is preferably 0.05% or more.
  • the regular reflectance R (30) is more preferably 1.5% or less, particularly 0.7% or less.
  • R (40) exceeds 0.005% or R (50) exceeds 0.0005% the antiglare film is whitened and the visibility tends to be lowered.
  • R (40) and R (50) are not so large.
  • R (40) is generally preferably 0.0001% or more
  • R (50) is generally 0, since sufficient antiglare properties are not exhibited even if the reflectance at these angles is too small. It is preferably 0.0001% or more.
  • R (50) is more preferably 0.0001% or less.
  • FIG. 6 shows the reflection of the light 507 reflected at the reflection angle ⁇ with respect to the light 505 incident at an angle of 30 ° from the normal 502 on the hard coat layer side of the antiglare film of the present invention (antiglare film 501 in FIG. 5).
  • a reflectance is a logarithmic scale.
  • Such a graph representing the relationship between the reflection angle and the reflectance, or the reflectance for each reflection angle read therefrom may be referred to as a reflection profile.
  • the regular reflectance R (30) is a reflectance peak with respect to the light 505 incident at 30 °, and the reflectance tends to decrease as the angle deviates from the regular reflection direction.
  • the regular reflectance R (30) is about 0.4%
  • R (40) is about 0.001%
  • R (50) is about 0.00003%. .
  • a detector In measuring the reflectance of the antiglare film, it is necessary to accurately measure a reflectance of 0.001% or less, as with the relative scattered light intensity. Therefore, it is effective to use a detector with a wide dynamic range.
  • a detector for example, a commercially available optical power meter can be used, and an aperture is provided in front of the detector of this optical power meter so that the angle at which the antiglare film is viewed is 2 °. Measurements can be made using an angular photometer.
  • incident light visible light of 380 to 780 nm can be used, and as a measurement light source, collimated light emitted from a light source such as a halogen lamp can be used, or in parallel with a monochromatic light source such as a laser.
  • a high degree may be used.
  • reflection from the back surface of the antiglare film may affect the measured value.
  • the smooth surface of the antiglare film is adhered to a black acrylic resin plate with an adhesive or It is preferable that only the reflectance on the outermost surface of the antiglare film can be measured by optical adhesion using a liquid such as water or glycerin.
  • the reflectances R (30), R (40) and R (50) defined in the present invention are measured as follows. Irradiation of parallel light from a He—Ne laser onto a concavo-convex surface of an antiglare film from a direction inclined by 30 ° with respect to the film normal, and the angle of reflectance in a plane including the film normal and the light incident direction Measure changes.
  • reflectance both “3292 03 Optical Power Sensor” and “3292 Optical Power Meter” manufactured by Yokogawa Electric Corporation are used.
  • the antiglare film of the present invention may have a low reflection film on the outermost surface thereof, that is, on the uneven surface side of the hard coat layer. Even in the absence of a low reflection film, a sufficient antiglare function is exhibited, but the antiglare property can be further improved by providing a low reflection film on the outermost surface.
  • the low reflection film can be formed by providing a layer made of a low refractive index material having a refractive index lower than that of the hard coat layer on the hard coat layer. Specific examples of such a low refractive index material include lithium fluoride (LiF), magnesium fluoride (MgF 2 ), aluminum fluoride (AlF 3 ), cryolite (3NaF ⁇ AlF 3 or Na 3 AlF 6).
  • inorganic low-reflective materials containing acrylic resin, epoxy resin, etc .; fluorine-based or silicone-based organic compounds, thermoplastic resins, thermosetting resins, UV-curable resins, etc.
  • An organic low reflection material can be mentioned.
  • the antiglare film of the present invention is excellent in the antiglare effect, effectively prevents whitening, and can effectively suppress the occurrence of glare and the decrease in contrast.
  • An image display device provided with such an antiglare film of the present invention has excellent visibility.
  • the polarizing plate generally has a form in which a protective film is bonded to at least one surface of a polarizing film made of a polyvinyl alcohol-based resin film in which iodine or a dichroic dye is adsorbed and oriented.
  • an antiglare polarizing plate can be obtained by laminating the polarizing film and the antiglare film of the present invention on the light diffusing laminated resin film side of the antiglare film.
  • the other surface of the polarizing film may be in a state where nothing is laminated, another protective film or an optical film may be laminated, and an adhesive layer for bonding to a liquid crystal cell. May be formed.
  • the antiglare film of the present invention is bonded on the light diffusing laminated resin film side on the protective film of the polarizing plate having a protective film bonded on at least one side of the polarizing film, and the antiglare polarizing plate It can also be.
  • a polarizing plate having a protective film bonded to at least one surface a light diffusing laminated resin film is used as the protective film, and a hard coat layer is formed on the light diffusing laminated resin film, thereby providing antiglare properties. It can also be a polarizing plate.
  • the antiglare polarizing plate since a light diffusing laminated resin film having excellent surface smoothness is used, bubbles at the interface between the light diffusing laminated resin film and the polarizing film or the protective film laminated on the polarizing film are used. Intrusion and warping of the film can be eliminated or reduced.
  • the image display device of the present invention is a combination of the antiglare film or the antiglare polarizing plate of the present invention and an image display element.
  • the image display element is typically a liquid crystal panel that includes a liquid crystal cell in which liquid crystal is sealed between upper and lower substrates and displays an image by changing the alignment state of the liquid crystal by applying a voltage.
  • the antiglare film or the antiglare polarizing plate of the present invention can be applied to various known displays such as a display, a CRT display, and an organic EL display.
  • the antiglare film or the antiglare polarizing plate is arranged on the viewing side with respect to the image display element.
  • an anti-glare film or an anti-glare polarizing plate ie, a hard-coat layer side
  • the image display device provided with the antiglare film or the antiglare polarizing plate of the present invention can scatter incident light due to the unevenness of the surface of the antiglare film and blur the reflected image. Gives excellent visibility.
  • the antiglare film or the antiglare polarizing plate of the present invention does not cause glare as seen in conventional antiglare films even when applied to a high-definition image display device, and is sufficiently reflected. Inhibition performance, whitening prevention, glare suppression, and contrast reduction suppression performance.
  • the polymerization was completed by holding for 60 minutes.
  • the obtained latex was put into a 0.5% aluminum chloride aqueous solution to aggregate the polymer. This was washed 5 times with warm water and then dried to obtain an acrylic multilayer polymer.
  • the concentration X of the light diffusing agent in the resin layer (A) is 15% by weight.
  • Each of the first to third rolls is a metal elastic roll as shown in FIG. 7 (b), and the metal thin film is made of polished stainless steel. Water was used as the fluid to be circulated in the roll, and the set temperature was 80 ° C. for all.
  • Table 1 shows the thickness of the resin layer (A), the thicknesses Y and Y ′ ( ⁇ m) of the first and second transparent resin layers (B), the concentration X (wt%) of the light diffusing agent, and (X + 8). The value of was shown.
  • Table 1 shows the thickness of the resin layer (A), the thicknesses Y and Y ′ ( ⁇ m) of the first and second transparent resin layers (B), the concentration X (wt%) of the light diffusing agent, and (X + 8). The value of was shown.
  • Extruder I Screw diameter 65 mm, uniaxial, with vent (manufactured by Toshiba Machine Co., Ltd.).
  • Extruder II Screw diameter 45 mm, uniaxial, with vent (manufactured by Hitachi Zosen).
  • Feed block 2-type, 3-layer distribution (manufactured by Hitachi Zosen Corporation).
  • Die T-die, lip width 1400 mm, lip interval 1 mm (manufactured by Hitachi Zosen Corporation).
  • Example 9 [Production and evaluation of antiglare film]
  • a surface of a 200 mm diameter iron roll (STKM13A by JIS) was prepared by applying copper ballad plating.
  • the copper ballad plating was composed of a copper plating layer / a thin silver plating layer / a surface copper plating layer, and the thickness of the entire plating layer was about 200 ⁇ m.
  • the surface of the surface copper plating layer is mirror-polished, and on the polished surface, a blasting device (manufactured by Fuji Seisakusho) is used to make zirconia beads “TZ-B125” (trade name, manufactured by Tosoh Corporation).
  • the average particle size is 125 ⁇ m
  • beads are used 6 g / cm 2 (the amount used per 1 cm 2 of the surface area of the roll, hereinafter referred to as “blast amount”), blast pressure 0.05 MPa (gauge pressure, the same applies hereinafter), and beads are injected Blasting was performed at a distance of 600 mm from the nozzle to the metal surface (hereinafter referred to as “blasting distance”).
  • blasting distance zirconia beads “TZ-SX-17” (trade name, average particle size 20 ⁇ m) manufactured by Tosoh Corporation were applied to the blasted surface with a blasting amount of 3 g / cm. 2.
  • the surface was uneven by blasting at a blasting pressure of 0.05 MPa and a blasting distance of 450 mm.
  • Etching was performed on the obtained copper-plated iron roll having surface irregularities using a cupric chloride aqueous solution. The etching amount at that time was set to 3 ⁇ m. Thereafter, the etched surface was subjected to chrome plating to produce a metal mold. At this time, the chromium plating thickness was set to 4 ⁇ m.
  • the obtained mold had a surface Vickers hardness of 1,000.
  • Pentaerythritol triacrylate 60 parts by weight Polyfunctional urethanized acrylate (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate) 40 parts by weight
  • a photopolymerization initiator “Lucillin TPO” manufactured by BASF, chemical name: 2,4,6-trimethylbenzoyldiphenylphosphine oxide) was added in an amount of 5 parts by weight to prepare a coating solution.
  • This coating solution was applied onto the light diffusing laminated resin film obtained in Example 1 so that the coating thickness after drying was 8.0 ⁇ m, and dried for 1 minute in a dryer set at 80 ° C. It was. The dried film was brought into close contact with the uneven surface of the metal mold produced above with a rubber roll so that the ultraviolet curable resin composition layer was on the mold side. In this state, the ultraviolet curable resin composition layer is cured by irradiating light from a high-pressure mercury lamp with an intensity of 20 mW / cm 2 from the light diffusing laminated resin film side so that the amount of light in terms of h-line is 300 mJ / cm 2. I let you.
  • the light diffusing laminated resin film is peeled from the mold together with the cured resin to obtain an antiglare film comprising a laminate of a hard coat layer (cured resin) having irregularities on the surface and the light diffusing laminated resin film. It was.
  • the resulting antiglare film does not cause glare or whitish, and when applied to an image display device, the relative scattered light intensity T (20) that causes a decrease in contrast is 0.00027%, and T (30) is Good scattering characteristics were sufficiently low at 0.00006%.
  • the internal haze of the light diffusing laminated resin film of Example 1 was 14.8%.
  • the measurement was carried out by bonding one surface of a light diffusing laminated resin film to a glass substrate using an optically transparent adhesive, and subsequently, forming a triacetyl cellulose film having a haze of almost 0 on the other surface.
  • a light diffusing laminated resin film bonded with an optically transparent adhesive and sandwiched between the glass substrate and a triacetyl cellulose film is manufactured by Murakami Color Research Laboratory Co., Ltd. in accordance with JIS K 7136. Haze meter “HM-150” type) was used.
  • the surface haze and internal haze of the hard coat layer were 1.7% and 0.0%, respectively.
  • the measurement was performed as follows. First, after forming a hard coat layer on a triacetyl cellulose film having a haze of almost 0%, the laminated film and the glass substrate are bonded with a transparent adhesive so that the triacetyl cellulose film side becomes a bonding surface. The whole haze was measured by using a haze meter “HM-150” manufactured by Murakami Color Research Laboratory Co., Ltd. in accordance with JIS K 7136.

Landscapes

  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

L'invention porte sur un film de résine stratifié diffusant la lumière, qui comprend un film stratifié obtenu par moulage par co-extrusion et comprenant une couche de résine (A) constituée d'une résine transparente contenant, dispersé dans celle-ci, un diffuseur de lumière dont le diamètre de particule moyen en masse est de 1 à 20 µm, et des première et seconde couches de résine transparente (B) respectivement superposées sur les deux côtés de la couche de résine (A), le film stratifié ayant été formé tout en conservant au moins un côté du film en contact avec un rouleau élastique. La concentration du diffuseur de lumière dans la couche de résine (A), X (% en poids), et les épaisseurs des première et seconde couches de résine transparente (B), Y et Y' (µm), satisfont les relations X + 8 ≤ Y et X + 8 ≤ Y'. L'invention porte également sur un procédé de fabrication du film de résine et sur un film antireflet, sur un polariseur antireflet et sur un dispositif d'affichage d'image, chacun comprenant ou employant le film de résine diffusant la lumière.
PCT/JP2009/051954 2008-02-19 2009-02-05 Film de résine stratifié diffusant la lumière, son procédé de fabrication, film antireflet, polariseur antireflet et dispositif d'affichage d'image WO2009104480A1 (fr)

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CN102964792A (zh) * 2012-11-06 2013-03-13 深圳市奥拓电子股份有限公司 一种改性聚碳酸酯组合物及其制备的led全彩屏模组面罩
CN106772722A (zh) * 2016-12-29 2017-05-31 张家港康得新光电材料有限公司 扩散膜、背光模组与显示装置
CN109903691A (zh) * 2019-03-22 2019-06-18 深圳立泰触控显示科技有限公司 一种防眩光的电子显示广告牌
EP3489320A4 (fr) * 2016-09-23 2019-08-21 LG Chem, Ltd. Composition adhésive
CN111766648A (zh) * 2019-03-27 2020-10-13 琳得科株式会社 层叠片的辊体

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JP5327068B2 (ja) * 2010-01-15 2013-10-30 大日本印刷株式会社 グラビア版胴の製造方法
JP6150974B2 (ja) * 2010-07-16 2017-06-21 大日本印刷株式会社 表示装置
JP5598308B2 (ja) * 2010-12-21 2014-10-01 コニカミノルタ株式会社 反射防止フィルムの製造方法
JP5621656B2 (ja) * 2011-02-25 2014-11-12 住友化学株式会社 下部電極基板用樹脂板、並びにそれを用いてなる下部電極板およびタッチパネル
DE102013222702A1 (de) 2013-11-08 2015-05-13 Osram Opto Semiconductors Gmbh Optoelektronisches Bauelement, optoelektronische Anordnung, Verfahren zum Herstellen eines optischen Elements und Verfahren zum Herstellen eines optoelektronischen Bauelements

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JP2004103335A (ja) * 2002-09-06 2004-04-02 Daicel Chem Ind Ltd 面状光源装置
JP2005156615A (ja) * 2003-11-20 2005-06-16 Konica Minolta Opto Inc 防眩フイルム、防眩性反射防止フィルム及びそれらの製造方法、並びに偏光板及び表示装置

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JPH11235747A (ja) * 1998-02-24 1999-08-31 Hitachi Zosen Corp シート・フィルムの成形用ロール装置
JP2004103335A (ja) * 2002-09-06 2004-04-02 Daicel Chem Ind Ltd 面状光源装置
JP2005156615A (ja) * 2003-11-20 2005-06-16 Konica Minolta Opto Inc 防眩フイルム、防眩性反射防止フィルム及びそれらの製造方法、並びに偏光板及び表示装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102964792A (zh) * 2012-11-06 2013-03-13 深圳市奥拓电子股份有限公司 一种改性聚碳酸酯组合物及其制备的led全彩屏模组面罩
EP3489320A4 (fr) * 2016-09-23 2019-08-21 LG Chem, Ltd. Composition adhésive
US10968372B2 (en) 2016-09-23 2021-04-06 Lg Chem, Ltd. Pressure-sensitive adhesive composition
CN106772722A (zh) * 2016-12-29 2017-05-31 张家港康得新光电材料有限公司 扩散膜、背光模组与显示装置
CN109903691A (zh) * 2019-03-22 2019-06-18 深圳立泰触控显示科技有限公司 一种防眩光的电子显示广告牌
CN111766648A (zh) * 2019-03-27 2020-10-13 琳得科株式会社 层叠片的辊体

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