CN104081232A - Production method for polarizing laminated film and production method for polarizing plate - Google Patents

Production method for polarizing laminated film and production method for polarizing plate Download PDF

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Publication number
CN104081232A
CN104081232A CN201280068747.XA CN201280068747A CN104081232A CN 104081232 A CN104081232 A CN 104081232A CN 201280068747 A CN201280068747 A CN 201280068747A CN 104081232 A CN104081232 A CN 104081232A
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film
polarizability
diaphragm
width
layer
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CN201280068747.XA
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CN104081232B (en
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九内雄一朗
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • 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
    • 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
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • 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
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G02B1/105—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/44—Number of layers variable across the laminate
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2255/28—Multiple coating on one 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/516—Oriented mono-axially
    • 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
    • B32B2307/70—Other properties
    • B32B2307/706—Anisotropic
    • 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
    • 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
    • B32B2551/00—Optical elements

Abstract

Provided are a production method for a polarizing laminated film and a production method for a polarizing plate using the polarizing laminated film obtained using said method. The production method for the polarizing laminated film includes: a step in which a polarizing film comprising a polarizer layer upon a base material film is prepared; and a step in which a first protective film wider than the polarizing film is arranged upon the polarizer layer in the polarizing film via a first adhesive layer, and a second protective film wider than the polarizing film is arranged upon the other surface of the polarizing film. The first and second protective films are arranged such that: both ends in the width direction of the first and second protective films are positioned further on the outside than both ends in the width direction of the polarizing film; and both ends in the width direction of the first adhesive layer are positioned further on the outside than both ends in the width direction of the polarizing film, and further on the inside than both ends in the width direction of the first and second protective films.

Description

The manufacture method of polarizability stacked film and the manufacture method of polarization plates
Technical field
The present invention relates to the manufacture method of polarizability stacked film and the manufacture method of polarization plates.
Background technology
Polarization plates is as the feed element of the polarized light in liquid crystal indicator and as the detecting element of polarized light and be widely used.In the past; mainly use at polyethenol series polarizing coating by the bonding agent polarization plates that the diaphragm that comprises triacetyl cellulose etc. forms of fitting as polarization plates; in recent years; be accompanied by carrying out and to carrying out of large-scale tv machine etc., requiring polarization plates light thin-wall in the mobile device such as subnotebook PC, mobile phone of liquid crystal indicator.
For example, in TOHKEMY 2000-338329 communique (patent documentation 1); as the method for manufacturing slim polarization plates; disclose: be coated with the solution that contains polyvinyl alcohol resin and form after resin bed at the one side to base material film; carry out uniaxial tension; then dyeing, obtains having the film of layer of polarizer thus, afterwards in the layer of polarizer side of this film by the bonding agent diaphragm of fitting; make after polarizability stacked film, peel off the manufacture method of the polarization plates of removing base material film.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2000-338329 communique
Summary of the invention
The problem that invention will solve
With regard to thering is the film of layer of polarizer and the laminating of diaphragm, generally by bonding agent by these film-stack, by the duplexer obtaining for example between a pair of doubling roller by wait and duplexer crimping is carried out.But in the time of the crimping of duplexer, bonding agent overflows (spilling) from its Width end, has the contaminated problem of the compression bonding apparatus such as doubling roller.This problem is especially serious in the time using the base material film of long size and diaphragm to manufacture continuously the polarizability stacked film of long size, polarization plates; in this is manufactured continuously; the bonding agent that is attached to the compression bonding apparatus such as doubling roller is needed on the outer surface of above-mentioned duplexer (with the surface of contact of compression bonding apparatus) gradually, and polarizability stacked film and polarization plates itself are polluted.
On the other hand, in order to suppress bonding agent from the overflowing of duplexer end, if reduce the quantity delivered of bonding agent, in the time of the crimping of duplexer, there is not bonding agent in the two end portions of Width, can be at this two end portions generation poor attachment.
Therefore the object of the present invention is to provide in laminating when diaphragm, can prevent the poor attachment of film two end portions and prevent the polarizability stacked film of pollution on compression bonding apparatus that bonding agent causes, film surface and the manufacture method of polarization plates.
Solve the means of problem
The present invention includes following content.
[1] manufacture method for polarizability stacked film, it comprises:
Prepare the operation of polarizability film, described polarizability film possesses the layer of polarizer that polyvinyl alcohol resin layer forms and width is identical or narrower than the width of described base material film with the width of described base material film that is had dichromatism pigment by absorption orientation at least one face of base material film, and
Obtain the operation of polarizability stacked film; wherein; in the layer of polarizer that the described face at base material film arranges on a face of described polarizability film, configure width the 1st diaphragm wider than described polarizability film via the 1st bond layer; on another face of described polarizability film, configure width 2nd diaphragm wider than described polarizability film
Configure in the following manner the described the 1st and the 2nd diaphragm: the Width two ends of the described the 1st and the 2nd diaphragm lay respectively at the more lateral at the Width two ends of described polarizability film, simultaneously the Width two ends of described the 1st bond layer lay respectively at described polarizability film Width two ends more lateral and be positioned at the inside at the Width two ends of the described the 1st and the 2nd diaphragm.
[2] according to the manufacture method of the polarizability stacked film [1] described; it further comprises following operation: after the operation of configuration the described the 1st and the 2nd diaphragm; cut off in the position at the Width two ends of described layer of polarizer or than the position of the inside, position at the Width two ends of described layer of polarizer, thus the Width two end portions of described polarizability stacked film is removed.
[3] according to the manufacture method of the polarizability stacked film [1] described, wherein,
The operation of preparing described polarizability film comprises:
By be coated with at least one face of described base material film operation that the coating fluid that contains polyvinyl alcohol resin forms polyvinyl alcohol resin layer,
By have polyvinyl alcohol resin layer base material film uniaxial tension operation and
With dichromatism pigment, the polyvinyl alcohol resin layer dyeing of the film after uniaxial tension is made to the operation of layer of polarizer.
[4] manufacture method for polarization plates, it comprise prepare the polarizability stacked film of manufacturing by [2] described method operation and
Peel off and remove described base material film from described polarizability stacked film, obtain being fitted with in described layer of polarizer the operation of the 1st polarization plates of described the 1st diaphragm.
[5] according to the manufacture method of the polarization plates [4] described, wherein, described polarizability film possesses described layer of polarizer on the two sides of described base material film,
In the operation of configuration the described the 1st and the 2nd diaphragm; described the 2nd diaphragm configures in the following manner: on another face of described polarizability film, configure via the 2nd bond layer; the Width two ends of described the 2nd bond layer lay respectively at described polarizability film Width two ends more lateral and be positioned at the inside at the Width two ends of the described the 1st and the 2nd diaphragm
Peel off and remove described base material film from described polarizability stacked film, obtain described the 1st polarization plates and be fitted with the 2nd polarization plates of described the 2nd diaphragm in described layer of polarizer.
Invention effect
The method according to this invention, can form and prevent bonding agent overflowing and being formed uniformly bond layer at the whole binding face of polarizability film and diaphragm from film end.Therefore according to the method for polarizability stacked film of the present invention and polarization plates, in the time of laminating diaphragm, can prevent the poor attachment of film two end portions and prevent the compression bonding apparatus that bonding agent causes, the pollution on film surface.
Brief description of the drawings
Fig. 1 is the process flow diagram that represents the preferred implementation of the manufacture method of polarizability stacked film involved in the present invention and the manufacture method of polarization plates.
Fig. 2 is the oblique view that schematically represents an example of bonding process.
Fig. 3 is illustrated in bonding process at polarizability film to have fitted the 1st and the approximate vertical view of an example of the state of the 2nd diaphragm.
Fig. 4 is the summary section of the IV-IV line shown in Fig. 3.
Fig. 5 is the vertical view that schematically represents the relation of the direction of delaminate of the base material film in stripping process and the direction of orientation of layer of polarizer.
Fig. 6 schematically represents pick-up point place polarizability stacked film and the 1st polarization plates angulation p and polarizability stacked film and base material film angulation the outboard profile of relation.
Embodiment
Below, illustrate that embodiment is elaborated to the manufacture method of polarizability stacked film involved in the present invention and the manufacture method of polarization plates.
The manufacture method > of < polarizability stacked film
Fig. 1 is the process flow diagram that represents the preferred implementation of the manufacture method of polarizability stacked film involved in the present invention and the manufacture method of polarization plates.
The manufacture method of the polarizability stacked film of present embodiment comprises successively: the operation of preparing to possess at least one face of base material film the polarizability film of layer of polarizer; In the layer of polarizer that the above-mentioned face at base material film arranges on a face of polarizability film, via the 1st bond layer laminating, configuration the 1st diaphragm, on another face of polarizability film, configure the 2nd diaphragm and obtain the bonding process S40 of polarizability stacked film; What the Width two end portions of polarizability stacked film was removed removes operation S50.
In addition, in the present embodiment, the operation of preparing above-mentioned polarizability film comprises successively: the resin bed that forms polyvinyl alcohol resin layer at least one face of base material film forms operation S10; The stretching process S20 of base material film uniaxial tension of polyvinyl alcohol resin layer will be there is; With the dyeing process S30 that with dichromatism pigment, the polyvinyl alcohol resin layer dyeing of the film after uniaxial tension is made to layer of polarizer.
In above-mentioned bonding process S40, the 1st and the 2nd diaphragm uses the width diaphragm wider than polarizability film.1st, the mode that the 2nd diaphragm lays respectively at the more lateral at the Width two ends of polarizability film with their Width two ends is disposed on polarizability film.Now, lay respectively at the more lateral at Width two ends of polarizability film and the mode that is positioned at the inside at the Width two ends of the 1st and the 2nd diaphragm and adjust the width of the 1st bond layer with the Width two ends of the 1st bond layer.
It should be noted that as described later, in the present embodiment, can be by peeling off and remove base material film and obtain polarization plates (stripping process S60) from being carried out up to the polarizability stacked film of removing Width two end portions that operation S50 obtains is removed.
Below, each operation of S10～S50 that the manufacture method of the polarizability stacked film to present embodiment possesses describes in more detail.
(1) resin bed forms operation S10
This operation is the operation that forms polyvinyl alcohol resin layer at least one surface of base material film.This polyvinyl alcohol resin layer is stretched operation S20 and dyeing process S30 and become the layer of layer of polarizer.Can, by the roll body that forms from the base material film of long size is reeled continuously by base material film debatching, on the base material film of debatching, form continuously polyvinyl alcohol resin layer and implement continuously this operation.
Can, by the coating fluid that contains polyvinyl alcohol resin is coated to base material film surface, make as required coating layer be dried to form polyvinyl alcohol resin layer.Utilize such method, can make the less thick of polyvinyl alcohol resin layer and layer of polarizer, therefore favourable for the slimming of polarizability stacked film and polarization plates.
The method of coating coating fluid can be from roller rubbing methods such as line rod rubbing method, reversion rubbing method, intaglio plate rubbing methods; Die slot rubbing method; Comma rubbing method; Lip is coated with method; Method of spin coating; Silk screen rubbing method; Fountain type rubbing method; Infusion process; Or the known method such as spray-on process is suitably selected.
For the adaptation that makes base material film and polyvinyl alcohol resin layer improves, can between base material film and polyvinyl alcohol resin layer, undercoat be set.Consider from the viewpoint of adaptation, preferably form undercoat by the resin combination that contains polyvinyl alcohol resin and crosslinking chemical etc.
In the operation of coating coating fluid, the uncoated area of uncoated coating fluid can be set in the Width two end portions of base material film.Uncoated area can be Width inward at both ends side more than 0.5cm and the region (being preferably below 10cm) below 20cm respectively from base material film.By uncoated area is set, can suppress the warpage of the Width two end portions of the base material film that can produce in the time that coating layer is dry.For this uncoated area, in stretching process S20 or afterwards in the time that film is batched, because sometimes produce the wave of fracture that can cause film, therefore before stretching process S20 or after stretching process S20 before the batching of film, remove uncoated area by cut-out.
When coating fluid is coated to whole of base material film, the width of polyvinyl alcohol resin layer (thereby layer of polarizer) is identical with the width of base material film.On the other hand, in the time above-mentioned uncoated area is set is coated with coating fluid, the width of polyvinyl alcohol resin layer (thereby layer of polarizer) becomes narrower than the width of base material film.
In the time that coating fluid contains solvent for from coating layer except desolventizing and implement the dry of coating layer.Set baking temperature and drying time according to the kind of solvent.Baking temperature is for example 50～200 DEG C, is preferably 60～150 DEG C.Be for example 2～20 points drying time.
Polyvinyl alcohol resin layer can only form at a face of base material film, also can form on two sides, but owing to obtaining 2 polarization plates from 1 polarizability stacked film, favourable aspect the throughput rate raising of polarization plates, therefore preferably form polyvinyl alcohol resin layer on the two sides of base material film.Now, preferably form above-mentioned undercoat on the two sides of base material film.In addition, while forming polyvinyl alcohol resin layer on the two sides of base material film, these polyvinyl alcohol resin layers form in the mode of the formation position consistency in base material face conventionally.
The thickness of polyvinyl alcohol resin layer is preferably and exceedes 3 μ m and below 30 μ m, more preferably 5～20 μ m.If there is the polyvinyl alcohol resin layer of the thickness within the scope of this, pass through aftermentioned stretching process S20 and dyeing process S30, can obtain the layer of polarizer that dyeability is good and polarization characteristic is excellent and thickness is enough little of dichromatism pigment.If the thickness of polyvinyl alcohol resin layer exceedes 30 μ m, the thickness of layer of polarizer exceedes 10 μ m sometimes.
(coating fluid)
Above-mentioned coating fluid be for example preferably the powder dissolution that makes polyvinyl alcohol resin, in good solvent (water) and polyvinyl alcohol resin solution.As polyvinyl alcohol resin, can enumerate for example polyvinyl alcohol resin and derivant thereof.As the derivant of polyvinyl alcohol resin, except polyvinyl formal, polyvinyl acetal etc., also can enumerate with alkene such as ethene, propylene; The unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid; The Arrcostab of unsaturated carboxylic acid; Acrylamide etc. by polyvinyl alcohol resin modification and material.In above-mentioned polyvinyl alcohol resin, preferably use polyvinyl alcohol resin.
The average degree of polymerization of polyvinyl alcohol resin preferably 100～10000, more preferably 1000～10000.The average saponification degree of polyvinyl alcohol resin is preferably 80～100 % by mole, more preferably more than 94 % by mole.
Coating fluid can contain the adjuvant such as plastifier, surfactant as required.As plastifier, can use polyvalent alcohol or its condensation product etc., for example can exemplify glycerine, two glycerine, triglycerin, ethylene glycol, propylene glycol, polyglycol etc.Preferably the use level of adjuvant is set to below 20 % by weight of polyvinyl alcohol resin.
(base material film)
Base material film can comprise thermoplastic resin, wherein preferably comprises the thermoplastic resin that the transparency, physical strength, thermal stability, stretchability etc. are excellent.The concrete example of such thermoplastic resin comprises the such as polyolefin-based resins such as chain polyolefin-based resins, cyclic polyolefin hydrocarbon system resin (norbornene resin etc.); Polyester based resin; (methyl) acrylic resin; The cellulose esters such as cellulose triacetate, cellulose diacetate ester are resin; Polycarbonate-based resin; Polyvinyl alcohol resin; Vinylite; Polyarylate is resin; Polystyrene resin; Polyethersulfone is resin; Polysulfones is resin; Polyamide-based resin; Polyimide is resin; And their potpourri, multipolymer etc.
From reasons such as the stretchability excellences of the flatness excellence for being coated with coating fluid and stretching process S20, base material film preferably contains that to be selected from chain polyolefin-based resins, cyclic polyolefin hydrocarbon system resin, (methyl) acrylic resin and cellulose esters be at least a kind of resin.
Base material film can be by the 1 layer of single layer structure that resin bed forms that comprises a kind or two or more thermoplastic resins, can be also to comprise the multilayer laminated sandwich construction forming of resin bed of a kind or two or more thermoplastic resins.
As chain polyolefin-based resins, except the homopolymer of the chain such as polyvinyl resin, acrylic resin alkene, also can enumerate the multipolymer that comprises two or more chain alkene.The base material film that comprises chain polyolefin-based resins is easily stably with preferred aspect high magnification stretching.Wherein base material film more preferably comprises polypropylene-based resin (as acrylic resin, the multipolymer using propylene as main body etc. of the homopolymer of propylene), polyethylene-based resin (as polyvinyl resin, the multipolymer taking ethene as main body etc. of the homopolymer of ethene) etc.
1 of the example preferably using as forming the thermoplastic resin of base material film the multipolymer taking propylene as main body can be propylene and can with the multipolymer of other monomers of its copolymerization.
As can with other monomers of copolymerization of propylene, can enumerate for example ethene, alpha-olefin.As alpha-olefin, preferably use more than 4 alpha-olefin of carbon number, more preferably the alpha-olefin of carbon number 4～10.The concrete example of the alpha-olefin of carbon number 4～10 for example comprises the straight chain monoolefine class such as 1-butylene, 1-amylene, 1-hexene, 1-heptene, 1-octene, 1-decene; 3-methyl-1-butene, 3-Methyl-1-pentene, a chain monoolefine class such as 4-methyl-1-pentene; Vinyl cyclohexane etc.Propylene and can be random copolymers with the multipolymer of other monomers of its copolymerization can be also segmented copolymer.
The content of above-mentioned other monomers is for example 0.1～20 % by weight in multipolymer, is preferably 0.5～10 % by weight.In multipolymer, the content of other monomers can, according to the method for recording in the 616th page of " macromolecule analysis handbook " (nineteen ninety-five, the distribution of Kinokuniya bookstore), be obtained by carrying out infrared ray (IR) spectroscopic assay.
In above-mentioned, as polypropylene-based resin, preferably use homopolymer, propylene-ethylene random copolymers, propylene-1-butene random copolymer or propylene-ethylene-1-butene random copolymer of propylene.
The tacticity of polypropylene-based resin is preferably essentially isotaxy or syndiotaxy.The base material film being formed by the polypropylene-based resin with isotaxy or syndyotactic tacticity in fact, its preferable operability and the physical strength excellence under hot environment.
Base material film can be made up of a kind of chain polyolefin-based resins, also can be made up of the potpourri of two or more chain polyolefin-based resins, can also be made up of the multipolymer of two or more chain polyolefin-based resins.
Cyclic polyolefin hydrocarbon system resin is the general name of the resin that is polymerized taking cyclic olefin as polymerized unit, can enumerate the resin of for example recording in Japanese kokai publication hei 1-240517 communique, Japanese kokai publication hei 3-14882 communique, Japanese kokai publication hei 3-122137 communique etc.If enumerate the concrete example of cyclic polyolefin hydrocarbon system resin, there are the multipolymer (being random copolymers typically) of the chain such as addition polymer, cyclic olefin and ethene, the propylene alkene of open loop (being total to) polymkeric substance, the cyclic olefin of cyclic olefin and graft polymer and their hydride etc. their modifications being formed with unsaturated carboxylic acid or derivatives thereof.Wherein, be preferably used as cyclic olefin and used norborene, encircle the norbornene resin of the norborneol alkene monomers such as norborneol alkene monomer more.
Cyclic polyolefin hydrocarbon system resin commercially available various goods.As the example of the commercially available product of cyclic polyolefin hydrocarbon system resin, can enumerate commodity " Topas " (TOPAS ADVANCED POLYMERS GmbH company system, can manage plastics (strain) from treasured and start with) by name, " Arton " (JSR (strain) system), " ZEONOR " (Japanese auspicious father-in-law (strain) system), " ZEONEX " (Japanese auspicious father-in-law (strain) system), " Apel " (Mitsui Chemicals (strain) system) etc.
The commercially available product of the cyclic polyolefin resin film that the maskings such as " ESCENA (エ ス シ ー Na) " (ponding chemical industry (strain) system), " SCA40 " (ponding chemical industry (strain) system) by name commodity, " ZEONOR FILM " (Japanese auspicious father-in-law (strain) system) can be formed in addition, is used as base material film.
Base material film can be made up of a kind of cyclic polyolefin hydrocarbon system resin, also can be made up of the potpourri of two or more cyclic polyolefin hydrocarbon system resins, can also be made up of the multipolymer of two or more cyclic polyolefin hydrocarbon system resins.
Polyester based resin is the polymkeric substance with ester bond, is generally the resin of the condensed polymer that comprises polybasic carboxylic acid or derivatives thereof and polyvalent alcohol.Can use the dicarboxylic acid or derivatives thereof of 2 yuan as polybasic carboxylic acid or derivatives thereof, can enumerate such as terephthalic acid (TPA), m-phthalic acid, dimethyl terephthalate (DMT), naphthalene diformic acid dimethyl ester etc.Can use the glycol of 2 yuan as polyvalent alcohol, can enumerate such as ethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, cyclohexanedimethanol etc.
As the typical example of polyester based resin, can enumerate the polyethylene terephthalate as the condensed polymer of terephthalic acid (TPA) and ethylene glycol.Polyethylene terephthalate is crystalline resin, thereby and the polyethylene terephthalate of crystallization state before treatment easily implement stretch wait process stretchability more excellent.If be necessary, can the thermal treatment etc. when stretching or after stretching make its crystallization.In addition, (or making non-crystalline) the copolymerization polyethylene terephthalate by further making the skeleton copolymerization of other monomers and polyethylene terephthalate, crystallinity having been reduced also preferably uses because stretchability is excellent.As the example of copolymerization polyethylene terephthalate, can enumerate material for example copolymerization such as cyclohexanedimethanol, m-phthalic acid being formed etc.
As the polyester based resin beyond polyethylene terephthalate and copolymerization polyethylene terephthalate, can enumerate polybutylene terephthalate, PEN, PBN, poly terephthalic acid Sanya methyl esters, poly-naphthalenedicarboxylic acid Sanya methyl esters, poly terephthalic acid cyclohexane dimethyl ester, poly-naphthalenedicarboxylic acid cyclohexane dimethyl ester etc.
Base material film can be made up of a kind of polyester based resin, also can be made up of the potpourri of two or more polyester based resins, can also be made up of the multipolymer of two or more polyester based resins.
As (methyl) acrylic resin, can adopt (methyl) acrylic resin being applicable to arbitrarily.The concrete example of (methyl) acrylic resin comprises poly-(methyl) acrylate such as such as polymethylmethacrylate, methyl methacrylate-(methyl) acrylic copolymer, methyl methacrylate-(methyl) acrylate copolymer, methyl methacrylate-acrylate-(methyl) acrylic copolymer, (methyl) methyl acrylate-styrol copolymer (MS resin etc.), (for example there is the polymkeric substance of alicyclic alkyl, methyl methacrylate-cyclohexyl methacrylate multipolymer, methyl methacrylate-(methyl) acrylic acid norborneol ester copolymer etc.).Preferably use poly-(methyl) acrylic acid C such as poly-(methyl) methyl acrylate 1-6arrcostab, more preferably using taking methyl methacrylate as major component the methyl methacrylate of (50～100 % by weight are preferably 70～100 % by weight) is resin.
Base material film can be made up of a kind of (methyl) acrylic resin, also can be formed by the potpourri of two or more (methyl) acrylic resin, can also be formed by the multipolymer of two or more (methyl) acrylic resin.
Cellulose esters is that resin is the ester of cellulose and fatty acid.Cellulose esters is that the concrete example of resin comprises cellulose triacetate, cellulose diacetate ester, three cellulose propionate esters, dipropionic acid cellulose esters etc.Among them, particularly preferably cellulose triacetate (triacetyl cellulose).Cellulose triacetate commercially available various products, also favourable aspect the easiness of starting with, cost.As the example of the commercially available product of cellulose triacetate, can enumerate commodity " fujitac TD80 " (Fujiphoto (strain) system) by name, " fujitac TD80UF " (Fujiphoto (strain) system), " fujitac TD80UZ " (Fujiphoto (strain) system), " fujitac TD40UZ " (Fujiphoto (strain) system), " KC8UX2M " (Konica Minolta (strain) system), " KC4UY " (Konica Minolta (strain) system) etc.
Base material film can be that resin forms by a kind of cellulose esters, and the potpourri that can be also resin by two or more cellulose esters forms, and the multipolymer that can also be resin by two or more cellulose esters forms.
Polycarbonate-based resin is the engineering plastics that comprise the polymkeric substance that monomeric unit forms by carbonate group bonding, for having the resin of high-impact, thermotolerance, anti-flammability, the transparency.Form the polycarbonate-based resin of base material film and can be such resin that is known as modified polycarbonate after polymer backbone being modified in order to reduce photoelastic coefficient, improved the copolymerization polycarbonate etc. of wavelength dependency.
Polycarbonate-based resin commercially available various goods.As the example of the commercially available product of polycarbonate-based resin, can enumerate commodity " panlite " by name (Supreme Being people changes into (strain) system), " lupiron " (Mitsubishi's engineering plastics (strain) system), " SD polyca " (Sumitomo Tao Shi (strain) system), " caliber (カ リ バ ー) " (DOW Chemical (strain) system) etc.
Base material film can be made up of a kind of polycarbonate-based resin, also can be made up of the potpourri of two or more polycarbonate-based resins, can also be made up of the multipolymer of two or more polycarbonate-based resins.
In base material film, except above-mentioned thermoplastic resin, can also add suitable arbitrarily adjuvant.As such adjuvant, can enumerate such as ultraviolet light absorber, antioxidant, lubricant, plastifier, release agent, painted preventing agent, fire retardant, nucleator, antistatic agent, pigment and colorant etc.The content of the thermoplastic resin in base material film is preferably 50～100 % by weight, more preferably 50～99 % by weight, and more preferably 60～98 % by weight, are particularly preferably 70～97 % by weight.Thermoplastic resin in base material film when quantity not sufficient 50 % by weight, likely can not fully show high transparent that thermoplastic resin is original had etc.
The thickness of base material film can suitably determine, but from the viewpoint of generally preferred 1～500 μ m of the workability such as intensity, operability, more preferably 1～300 μ m, further preferably 5～200 μ m, most preferably 5～150 μ m.
In order to make to improve with the adaptation of polyvinyl alcohol resin layer, can carry out corona treatment, Cement Composite Treated by Plasma, flame treatment etc. to the surface of at least polyvinyl alcohol resin layer formation side of base material film.
It should be noted that polyvinyl alcohol resin layer also can form by the film that laminating is made up of polyvinyl alcohol resin on base material film in other embodiments, but now can in the laminating between film, use bonding agent.In the time using like this film being formed by polyvinyl alcohol resin, as the film being formed by polyvinyl alcohol resin, also use or width identical with the width of base material film to make the width of layer of polarizer identical with the width of base material film or narrower than it than its narrow film being formed by polyvinyl alcohol resin.
(2) stretching process S20
This operation is that the base material film to having polyvinyl alcohol resin layer carries out uniaxial tension and obtains the operation of stretched film.This operation also can be transported the film limit that forms the long size that operation S10 obtain through resin bed by limit and be carried out continuously stretch processing, or by the film that passes through the long size that resin bed formation operation S10 obtains first being batched for roller shape, limit is carried out film continuously stretch processing and implemented continuously in debatching limit continuously from this roll body again.
The stretching ratio of film can suitably be selected according to desirable polarization characteristic, but is preferably with respect to the exceeding below 5 times and 17 times of the former length of film, more preferably exceedes below 5 times and 8 times.If stretching ratio is below 5 times,, because polyvinyl alcohol resin layer can fully not be orientated, therefore the degree of polarization of layer of polarizer can fully not uprise sometimes.On the other hand, when stretching ratio exceedes 17 times, become the fracture of easy generation film and the thickness of stretched film and became thin and exceeded demand while stretching, likely the processability of rear operation and operability reduce.
Stretch processing is not limited to the stretching of a step, also can carry out with multistep.Now, the stretch processing of all multisteps all can be carried out continuously before dyeing process S30, also the dyeing processing in stretch processing later second step and dyeing process S30 and/or crosslinking Treatment can be carried out simultaneously.While carrying out stretch processing with multistep like this, preferably with stretch processing reach afterwards in steps the stretching ratio that exceedes 5 times mode carry out stretch processing.
Stretch processing, except being the vertical stretching stretching to film length direction (film carriage direction), can be also that horizontal stretching or the oblique pull stretching to film Width stretched etc.As vertical stretching mode, can enumerate stretching, compression stretching etc. between roller, as horizontal stretching mode, can enumerate tenter (テ ン タ ー) method etc.
Stretch processing can adopt any of wet type drawing process, dry type stretching method, can select preferably to use dry type stretching method aspect draft temperature from wide scope.
Draft temperature is set as more than polyvinyl alcohol resin layer and base material film general performance go out the temperature of mobility of the degree that can stretch, be preferably the scope of-30 DEG C～+ 30 DEG C of the phase inversion temperature of base material film, more preferably the scope of-25 of the phase inversion temperature of base material film DEG C～+ 5 DEG C.When the resin of formation base material film is amorphous resin, the phase inversion temperature of base material film refers to glass transition temperature Tg, refers to fusing point (crystalline melt point) Tm during for crystalline resin, all measures according to JIS K 7121.When base material film comprises multi-layer resinous layer, above-mentioned phase inversion temperature refers to the highest phase inversion temperature in this multi-layer resinous layer of phase inversion temperature showing.
If draft temperature is set to-30 DEG C lower than phase inversion temperature, is difficult to realize and exceedes the high magnification of 5 times and stretch.If draft temperature exceedes phase inversion temperature+30 DEG C, the mobility that has a base material film is excessive and stretch and become difficult tendency.
Owing to more easily realizing the high stretching ratio that exceedes 5 times, therefore draft temperature is in above-mentioned scope, more preferably more than 120 DEG C.The temperature adjustment of stretch processing is the temperature adjustment based on heating furnace conventionally.
(3) dyeing process S30
This operation is, with dichromatism pigment, the polyvinyl alcohol resin layer dyeing of stretched film is made to its absorption orientation, makes the operation of layer of polarizer.Obtain being laminated with the polarizability film of layer of polarizer on base material film through this operation.The stretched film limit that this operation can also be transported the long size that stretched operation S20 obtains by the limit processing of dyeing continuously, or by the stretched film that stretched operation S20 is obtained first batch as roller shape, dye film continuously to process and implement continuously in debatching limit continuously from this roll body in limit again.
As dichromatism pigment, for example, can enumerate iodine, organic dyestuff etc.As the concrete example of organic dyestuff, for example, comprise red BR, red LR, red R, pink LB, pinkish red BL, BOKDEAUX GS, sky blue LG, lemon yellow, blue BR, blue 2R, dark blue RY, green LG, purple LB, purple B, black H, black B, black GSP, yellow 3G, yellow R, orange LR, orange 3R, dark red GL, dark red KGL, Congo red, the purple BK of jewel, reactive blue G, reactive blue GL, reactive orange GL, direct sky blue, directly everbright fast orange S, sun-proof are black etc.These dichroic substance can only be used, or two or more may be used separately.
Dyeing process can be undertaken by dipping stretched film entirety in the solution that contains dichromatism pigment (staining solution).As staining solution, can use above-mentioned dichromatism pigment is dissolved in to the solution forming in solvent.As the solvent of staining solution, generally make water, also can further add the organic solvent that has compatibility with glassware for drinking water.The concentration of dichromatism pigment is preferably 0.01～10 % by weight, and more preferably 0.02～7 % by weight, is particularly preferably 0.025～5 % by weight.
In the situation that using iodine as dichromatism pigment, owing to can further improving dyeing efficiency, therefore preferably in the staining solution that contains iodine, further add iodide.As iodide, can enumerate such as potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc.The concentration of the iodide in staining solution is preferably 0.01～10 % by weight.In iodide, preferably add potassium iodide.Add in the situation of potassium iodide, the ratio of iodine and potassium iodide in weight ratio preferably in the scope of 1: 5～1: 100, more preferably in the scope of 1: 6～1: 80, in the scope of 1: 7～1: 70.
The dip time of stretched film in staining solution be generally 15 seconds～scope of 15 minutes, be preferably 30 seconds～3 minutes.In addition, the temperature of staining solution is preferably the scope of 10～60 DEG C, more preferably the scope of 20～40 DEG C.
It should be noted that, also dyeing process S30 can be carried out before stretching process S20 or simultaneously, but in order to make the dichromatism pigment that is adsorbed in polyvinyl alcohol resin layer be orientated well, preferably after at least a portion of implementing the stretch processing in stretching process S20, implement dyeing process S30.As embodiment now, can enumerate: 1) carry out after stretch processing with target multiplying power, do not follow stretch processing and implement the mode of dyeing process S30, 2) carry out after stretch processing with the multiplying power lower than target, dyeing processing in dyeing process S30 is (when dyeing process S30 comprises crosslinking Treatment operation, for dyeing is processed and/or crosslinking Treatment) in, the mode that becomes target multiplying power with total multiplying power is carried out stretch processing, 3) carry out after stretch processing with the multiplying power lower than target, dyeing processing in dyeing process S30 is (when dyeing process S30 comprises crosslinking Treatment operation, for dyeing is processed and/or crosslinking Treatment) in, carry out the degree of stretch processing to total multiplying power miss the mark multiplying power, then, the mode that becomes target multiplying power with total multiplying power is carried out mode of stretch processing etc.
Dyeing process S30 can comprise that then dyeing is processed and the crosslinking Treatment operation of enforcement.Crosslinking Treatment for example can be by carrying out containing the film after dip dyeing in the solution of crosslinking chemical (crosslinker solution).As crosslinking chemical, can use known material in the past, for example, can enumerate: the boron compounds such as boric acid, borax or glyoxal, glutaraldehyde etc.Crosslinking chemical can only be used, or two or more may be used separately.
Crosslinker solution can be specially crosslinking chemical is dissolved in to the solution forming in solvent.As solvent, for example can make water, can also contain the organic solvent that has compatibility with glassware for drinking water.The concentration of the crosslinking chemical in crosslinker solution is preferably the scope of 1～20 % by weight, more preferably the scope of 6～15 % by weight.
Crosslinker solution can contain iodide.By adding iodide, can make the polarization characteristic homogenising more in the face of layer of polarizer.As iodide, can enumerate such as potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc.The concentration of the iodide in crosslinker solution is preferably 0.05～15 % by weight, 0.5～8 % by weight more preferably.
The dip time of film after dyeing in crosslinker solution be generally 15 seconds～and 20 minutes, be preferably 30 seconds～15 minutes.In addition, the temperature of crosslinker solution is preferably in the scope of 10～90 DEG C.
It should be noted that, by coordinate crosslinking chemical in staining solution, crosslinking Treatment also can be processed and carry out simultaneously with dyeing.In addition, crosslinking Treatment can be carried out with a part for stretch processing simultaneously.The concrete mode of implementing stretch processing in crosslinking Treatment is the same.
Preferably after dyeing process S30, carry out matting and drying process before bonding process S40.Matting generally includes water matting.Water cleaning treatment can be by dip dyeing in the pure water such as ion exchange water, distilled water film after after treatment or crosslinking Treatment carry out.Water cleaning temperature is generally 3～50 DEG C, is preferably the scope of 4～20 DEG C.Dip time in water is generally 2～300 seconds, is preferably 3～240 seconds.
Matting can be the combination of water matting and the matting of utilizing iodide solution.In addition, the cleaning fluid using in water matting and/or in utilizing the cleaning treatment of iodide solution, except containing water, can suitably contain the liquid alcohols such as methyl alcohol, ethanol, isopropyl alcohol, butanols, propyl alcohol.
As the drying process carrying out after matting, can adopt natural drying, air-supply is dry, the suitable method arbitrarily such as heat drying.For example when heat drying, baking temperature is generally 20～95 DEG C, is generally drying time about 1～15 minute.
(4) bonding process S40
This operation is: possess in the one or two sides of base material film on a face of polarizability film of layer of polarizer; in the layer of polarizer having at it, via the 1st bond layer laminating, configuration the 1st diaphragm, on another face of polarizability film, preferably obtain the operation of polarizability stacked film via the 2nd bond layer configuration the 2nd diaphragm.This operation can also be transported each roll body that the polarizability film limit that obtains through dyeing process S30 forms from the 1st and the 2nd diaphragm of long size is reeled respectively by the 1st and the 2nd diaphragm debatching continuously by limit, and supplying with continuously bonding agent at (or further between polarizability film and the 2nd diaphragm) between polarizability film and the 1st diaphragm fits continuously, or by the polarizability film obtaining through dyeing process S30 is first batched as roller shape, again limit from this roll body by polarizability film each roll body that debatching limit forms from the 1st and the 2nd diaphragm of long size is reeled continuously respectively by the 1st and the 2nd diaphragm debatching continuously, and supply with continuously that bonding agent is fitted continuously and implement continuously at (or further between polarizability film and the 2nd diaphragm) between polarizability film and the 1st diaphragm.
Below; limit is with reference to Fig. 2～Fig. 4; limit is enumerated bonding process S40 is elaborated as an example of following embodiment example; described embodiment is: polarizability film has layer of polarizer on the two sides of base material film, and in bonding process S40, the 2nd diaphragm is fitted on polarizability film via the 2nd bond layer.
Fig. 2 is the oblique view that schematically represents an example of bonding process S40.Fig. 3 is the approximate vertical view that is illustrated in the 1st and the 2nd diaphragm in bonding process S40 and fits in an example of the state of polarizability film, is the figure that schematically represents the formation region of bond layer.Fig. 4 is the summary section of the IV-IV line shown in Fig. 3 in addition.
With reference to Fig. 2～Fig. 4; as a face of the polarizability film that stacked layer of polarizer 110 forms on base material film 100, the 1st diaphragm the 200, the 2nd diaphragm 300 of another face laminating; all use than the wide film of width of polarizability film (in other words, base material film 100)., meet the width W of the 1st diaphragm 200 2the width W of > polarizability film (base material film 100) 1, and the width W of satisfied the 2nd diaphragm 300 3the width W of > polarizability film (base material film 100) 1.It should be noted that, Fig. 2～Fig. 4 has expressed following example: used the film of uncoated area 120,130 (not forming the region of layer of polarizer 110) that is provided with uncoated coating fluid in the Width two end portions of base material film 100 as polarizability film.
In addition; with regard to the 1st, the 2nd diaphragm 200,300; lay respectively at the mode of the more lateral at the Width two ends of polarizability film (base material film 100) with their Width two ends, fit in polarizability film via the 1st bond layer 250 being formed by bonding agent S, the 2nd bond layer 350 that formed by bonding agent T respectively.With regard to the 1st and the 2nd diaphragm 200,300, can be with the Width center of their Width center and polarizability film consistent or roughly stacked, the laminating of consistent mode.It should be noted that, binding temperature is generally the scope of 15～40 DEG C.
Now; with regard to the 1st bond layer 250 and the 2nd bond layer 350, lay respectively at the more lateral at Width two ends of polarizability film and the mode that is positioned at the inside at the Width two ends of the 1st and the 2nd diaphragm 200,300 with their Width two ends and adjust their width and form.
Therefore; be fitted with in the stacked film of state of the 1st and the 2nd diaphragm 200,300 at polarizability film; Width two end portions becomes the part that does not have polarizability film between the 1st diaphragm 200 and the 2nd diaphragm 300; be formed to the degree of a part for this part with bond layer, the width of the 1st and the 2nd bond layer 250,350 is larger than the width of polarizability film (base material film 100).
According to applying method as above; do not produce the region that does not have bond layer; the whole binding face with the 1st, the 2nd diaphragm 200,300 in polarizability film is formed uniformly bond layer, therefore can stably manufacture the polarization plates excellent in adhesion of the polarizability stacked film excellent in adhesion of polarizability film and the 1st, the 2nd diaphragm 200,300 and layer of polarizer 110 and the 1st, the 2nd diaphragm 200,300.
In addition, can prevent the pollution of film when laminating bonding agent from compression bonding apparatus such as the doubling rollers that overflows and accompany therewith of the Width end of above-mentioned stacked film.When the polarizability film of long size uses the 1st and the 2nd diaphragm 200,300 to fit continuously, also can frontier defense stop the pollution of the compression bonding apparatus that overflowing of bonding agent cause and the pollution limit on the stacked film surface of accompanying therewith is stably manufactured polarizability stacked film and polarization plates continuously.
For polarizability film and the 1st and the 2nd diaphragm 200, 300, for example can fit by following method: between polarizability film and the 1st diaphragm 200, between polarizability film and the 2nd diaphragm 300, supply with respectively bonding agent S, bonding agent T, or be coated at least one film that will fit, then at a face of polarizability film via stacked the 1st diaphragm 200 of the 1st bond layer 250 being formed by bonding agent S, and at another face via stacked the 2nd diaphragm 300 of the 2nd bond layer 350 being formed by bonding agent T, make thus stacked film, by this stacked film from using compression bonding apparatus to carry out crimping by grade between a pair of doubling roller.
As the method that bonding agent is coated with to intermembranous supply or at least one film that will fit, can enumerate the head end of the nozzle of using in intermembranous placement of adhesives charging, use pumps etc. are supplied with the method for bonding agent from this nozzle; By the tape casting, line rod rubbing method, intaglio plate rubbing method, comma rubbing method, scraping blade method, die slot rubbing method, dip coated method, spray-on process etc. in the method for the bonding plane coating adhesive of at least one film etc.Can carry out the continuous supply of bonding agent and coating continuously according to above-mentioned any means.
For the width to afore mentioned rules by the width adjustment of the 1st and the 2nd bond layer 250,350, as long as the travelling speed of exert pressure (while using doubling roller, being the distance between doubling roller), the film of the quantity delivered of adjustment bonding agent or coating weight, compression bonding apparatus etc.In addition; when polarizability film, the 1st and the 2nd diaphragm 200,300 of the long size of use fitted continuously; can be at intermembranous continuous supply bonding agent; can use aspirator to attract continuously the excessive bonding agent limit from overflowing via the Width end of the stacked film of bond layer to implement bonding process in limit on the other hand; but now, also can adjust the width of the 1st and the 2nd bond layer 250,350 by adjusting the traffic attraction of bonding agent.
Polarizability film is only in the time that the one side of base material film has layer of polarizer; in bonding process S40, the 2nd diaphragm can be not directly configured on polarizability film via the 2nd bond layer (not supplying with bonding agent T between the face of side polarizability film and that have layer of polarizer opposition side and the 2nd diaphragm), but preferably via the 2nd bond layer configuration.When the 2nd diaphragm is not directly configured on polarizability film via the 2nd bond layer; with regard to the 1st and the 2nd diaphragm 200,300, lay respectively at the more lateral at Width two ends of polarizability film and the mode that is positioned at the inside at the Width two ends of the 1st and the 2nd diaphragm 200,300 with the Width two ends of the 1st bond layer 250 and be disposed on polarizability film.
(the 1st, the 2nd diaphragm)
As the 1st, the 2nd diaphragm 200,300, use as mentioned above their width W 2, W 3than the width W of polarizability film (base material film 100) 1wide film (W 2>W 1, W 3>W 1).Width W 2with W 3can be the same or different, but be generally same widths.
In order not exist the part of polarizability film to arrange enough greatly in the Width two end portions of above-mentioned stacked film, and effectively prevent overflowing of bonding agent, width W between the 1st diaphragm 200 and the 2nd diaphragm 300 2, W 3with width W 1difference be preferably set to 40mm more than, more than being more preferably set to 80mm.Do not exist more than the Width length of the part of above-mentioned polarizability film is preferably set to 20mm separately for the Width two end portions of stacked film, more than being more preferably set to 40mm.
On the other hand, if by width W 2, W 3arrange widely, remove in aftermentioned part that in operation S50, cut-out is removed and become large, aspect throughput rate (raw-material effective utilization) unfavorable, therefore preferably by width W 2, W 3with width W 1difference be set to below 100cm, be more preferably set to below 60cm, be further preferably set to below 40cm.
1st, the 2nd diaphragm 200,300 respectively can be for for example comprising the polyolefin-based resins such as chain polyolefin-based resins (polypropylene-based resin etc.), cyclic polyolefin hydrocarbon system resin (norbornene resin etc.); The cellulose esters such as cellulose triacetate, cellulose diacetate ester are resin; The polyester based resins such as polyethylene terephthalate, PEN, polybutylene terephthalate; Polycarbonate-based resin; (methyl) acrylic resin; Or the film of their potpourri, multipolymer etc.Can use the example of commercially available product of cyclic polyolefin hydrocarbon system resin and film thereof and cellulose triacetate the same.
The 1st diaphragm 200 and the 2nd diaphragm 300 can be made up of same material, also can be made up of foreign material.
The the 1st and/or the 2nd diaphragm 200,300 also can have for phase retardation film, brightness enhancement film etc. the diaphragm of optical function concurrently.For example, by the transparent resin film that comprises above-mentioned material is stretched (uniaxial tension or biaxial stretch-formed etc.) or form liquid crystal layer etc. on this film, can make and give the phase retardation film of phase difference value arbitrarily.
Consider from the viewpoint of the slimming of polarizability stacked film and polarization plates, the thickness of the 1st and the 2nd diaphragm 200,300 is preferably below 90 μ m, more preferably below 50 μ m.On the other hand, the viewpoint of guaranteeing from intensity, more than the thickness of the 1st and the 2nd diaphragm 200,300 is preferably 5 μ m.
For make bond layer and the 1st, the 2nd diaphragm 200,300 bonding plane cementability improve, preferably carry out the surface treatments such as primary coat processing, Cement Composite Treated by Plasma, corona treatment, ultraviolet treatment with irradiation, flame treatment (flame treatment), saponification processing.Wherein, be preferably corona treatment, the saponification processing that can implement with comparalive ease.As saponification processing, can enumerate the method for flooding in the such aqueous alkali of NaOH, potassium hydroxide.
Preferably improve effect and suitably select surface treatment in order to obtain sufficient cementability according to the kind of the resin that forms the 1st, the 2nd diaphragm 200,300.For example, while using cellulose esters resin film, saponification is processed effectively.In addition, while using the film that comprises the chain polyolefin-based resins such as polypropylene-based resin, cyclic polyolefin hydrocarbon system resin, polyester based resin, polycarbonate-based resin or (methyl) acrylic resin etc., corona treatment is effective.
Replace to diaphragm implement surface treatment or with its simultaneously, can implement surface treatment to the bonding plane of polarizability film.
Also can form the optical layers such as hard conating, antiglare layer, anti-reflection layer with the surface of the layer of polarizer opposition side of the 1st and/or the 2nd diaphragm 200,300.The method that forms these optical layers on diaphragm surface is not particularly limited, and can use known method.Can implement on diaphragm, to be pre-formed optical layers before bonding process S40, also can or implement to form optical layers after stripping process S60 after implementing after bonding process S40, implementing aftermentioned to remove operation S50.
(bonding agent)
As the bonding agent S using, for the bonding agent T that the 2nd diaphragm 300 uses as required with the laminating of polarizability film, can use water system bonding agent or Photocurable adhesive agent in the laminating of the 1st diaphragm 200 and polarizability film.
Bonding agent S and bonding agent T can be identical type, can be also variety classes, but from the viewpoint of production efficiency, preferably use the bonding agent of identical type.
As water system bonding agent, can enumerate the bonding agent, the water system two-component-type carbamate that comprise polyvinyl alcohol resin aqueous solution is emulsion bonding agent etc.Especially use while utilizing saponification processing etc. to carry out cellulose esters resin film after surface treatment (hydrophilicity-imparting treatment) as diaphragm, preferably use the water system bonding agent that comprises polyvinyl alcohol resin aqueous solution.
As polyvinyl alcohol resin, except using processing as the polyvinyl acetate saponification of the homopolymer of vinyl acetate alcotex, can also use vinyl acetate with processing with the multipolymer saponification of other monomers of its copolymerization polyvinyl alcohol (PVA) based copolymer or the modified polyvinylalcohol based polymer that its hydroxylic moiety modification is formed etc.
Water system bonding agent can contain the adjuvants such as polyaldehyde, soluble epoxide compound, melamine based compound, zirconia compound, zinc compound.While using water system bonding agent, the thickness of bond layer therefrom is generally below 1 μ m.
While using water system bonding agent, state on the implementation after laminating (via the stacked of the film of bond layer and apply by the pressure of compression bonding apparatus), in order to remove the water that contains in water system bonding agent, preferably enforcement makes the dry drying process of film.Can implement to be dried by film being imported to drying oven.
Baking temperature (temperature of drying oven) is preferably 30～90 DEG C.If 30 DEG C of less thaies, have polarizability film and diaphragm to become the tendency of easily peeling off.If baking temperature exceedes 90 DEG C in addition, likely by the thermal conductance deflection performance degradation that shakes.Can be set to 10～1000 seconds drying time, from the viewpoint of throughput rate, be preferably 60～750 seconds, more preferably 150～600 seconds.
After drying process, can be arranged on room temperature or the maintenance operation about 12～600 hours than the temperature maintenance of for example 20～45 DEG C of left and right of its high temperature a little.Curing temperature operated by rotary motion must be lower than baking temperature.
In the time that enforcement aftermentioned is removed operation S50, can before removing operation S50, carry out above-mentioned drying process and maintenance operation, also can after removing operation S50, carry out above-mentioned drying process and maintenance operation.But, while using the polarizability stacked film that passes through bonding process S40 and obtain to make polarization plates (while implementing stripping process S60), before stripping process S60, carry out drying process and maintenance operation.
Above-mentioned Photocurable adhesive agent refers to the curing bonding agent by irradiation ultraviolet radiation isoreactivity energy-ray, can enumerate bonding agent, the bonding agent that contains light reactive resin, the bonding agent that contains resin glue and photoreactivity crosslinking chemical etc. that for example contain polymerizable compound and Photoepolymerizationinitiater initiater.As polymerizable compound, can enumerate photo-curable epoxy and be monomer, photo-curable acrylic monomer, photo-curable carbamate and be the photopolymerization monomers such as monomer, from oligomer of photopolymerization monomer etc.As Photoepolymerizationinitiater initiater, can enumerate and comprise the initiating agent that produces the material in the activated centre of Neutral radical, radical anion, radical cation and so on by the irradiation of ultraviolet isoreactivity energy-ray.As the Photocurable adhesive agent that contains polymerizable compound and Photoepolymerizationinitiater initiater, can preferably use and contain the bonding agent that photo-curable epoxy is monomer and light cationic polymerization initiators.
As mentioned above, form while being provided with uncoated area in operation S10 at resin bed, sometimes in stretching process S20 etc. at this uncoated area generation wave.If implement bonding process S40 with Photocurable adhesive agent under the state that such wave has occurred, likely a part of Photocurable adhesive agent is stranded in wave part, thus the heat while irradiation due to active energy beam and xanthochromia is deteriorated.Therefore consider also preferably to remove uncoated area from avoiding the deteriorated viewpoint of this xanthochromia.
While using Photocurable adhesive agent, state on the implementation after laminating (via the stacked of the film of bond layer and apply by the pressure of compression bonding apparatus), by carrying out as required drying process (when Photocurable adhesive agent contains solvent etc.), then irradiate active energy beam and make the curing curing process of Photocurable adhesive agent.The light source of active energy beam is not particularly limited, but preferably below wavelength 400nm, have and send out active energy beam photodistributed, particularly, preferably use Cooper-Hewitt lamp, middle medium pressure mercury lamp, high-pressure mercury-vapor lamp, extra-high-pressure mercury vapour lamp, chemical lamp, black lamp, low-light to excite mercury vapor lamp, metal halide lamp etc.
Suitably determine according to the composition of Photocurable adhesive agent to the irradiation intensity of Photocurable adhesive agent, preferably taking the exposure intensity of the effective wavelength region may of activation to polymerization initiator as 0.1～6000mW/cm 2mode set.Exposure intensity is 0.1mW/cm 2when above, the reaction time can not become long, is 6000mW/cm 2when following, the xanthochromia of the Photocurable adhesive agent that the heat release while occurring from the heat of radiation of light source and Photocurable adhesive agent curing causes, the deteriorated possibility of layer of polarizer are little.
Also suitably determine according to the composition of Photocurable adhesive agent to irradiation time of Photocurable adhesive agent, preferably taking the accumulated light of the product representation by above-mentioned exposure intensity and irradiation time as 10～10000mJ/cm 2mode set.Accumulated light is 10mJ/cm 2when above, can produce the activated centre from polymerization initiator of q.s and curing reaction is carried out more reliably, is 10000mJ/cm 2when following, it is long that irradiation time can not become, and can maintain good throughput rate.
It should be noted that, the thickness of the postradiation bond layer of active energy beam is generally 0.001～5 μ m left and right, is preferably 0.01～2 μ m, more preferably 0.01～1 μ m.
Can before implementing aftermentioned while removing operation S50, removing operation S50, carry out above-mentioned drying process and curing process, also can after removing operation S50, carry out above-mentioned drying process and curing process.But, while using the polarizability stacked film that passes through bonding process S40 and obtain to make polarization plates (while implementing stripping process S60), before stripping process S60, carry out drying process and curing process.
(5) remove operation S50
This operation is by cutting off the operation of removing by the Width two end portions of the polarizability stacked film obtaining through bonding process S40 (or drying process, maintenance operation or curing process).This operation can also be transported limit by the polarizability stacked film of the long size obtaining through bonding process S40 by limit and be removed continuously processing, or by the polarizability stacked film of the long size obtain through bonding process S40 is first batched as roller shape, limit is removed polarizability stacked film continuously processing and is implemented continuously in debatching limit continuously from this roll body.
Using through bonding process S40 and polarizability stacked film directly in the time that polarization key element is used, can omit this operation, but from through bonding process S40 and polarizability stacked film making polarization plates time (while implementing stripping process S60) this operation be necessary operation.
One example of the off-position of film as shown in Figure 3; be layer of polarizer 110 Width two ends position or than its inner side position;, its at least can remove the 1st diaphragm 200 and the 2nd diaphragm 300 via bond layer directly (not having polarizability film) bonding part and in the time that polarizability film has uncoated area 120,130 (not forming the region of layer of polarizer 110) diaphragm and base material film via the position of the bonding part of bond layer direct (not having layer of polarizer 110).
, in stripping process S60, become and can easily peel off base material film 100 from layer of polarizer 110 except striping Width two end portions by the off-position such.
Can or use the slot method (ス リ ッ ト method) of slot device to carry out removing of film Width two end portions by cross cutting method.Wherein, preferably can implement continuously to remove to the polarizability stacked film of long size the slot method of processing.
As slot method, can enumerate the method that the razor blade that is for example called as Razor blade is used as slot device.Use the slot method of razor blade not comprise and backup guide roll is set especially and the aerial cut-out of slot aloft; As backup guide roll, in the roller that has cut out ditch, put into blade and make sinuous stable ditch roller method of slot etc.
If enumerate slot method example in addition, there is the circular blade that uses two to be called as shear-blade, limit coordinates the rotation limit of transporting of film to use cutter and bottom knife to pressurize and the method for slot; The blade that will be called as broken line blade (ス コ ア sword) quenches and to extruding such as rollers and the method for slot; Limit method of cutting edge slot etc. by the combination of two of shear-blades and as scissors.
Wherein, preferably use can be changed cut-out (slot) position of film and the easily stable method of advancing " is used the ditch roller method of razor blade " etc. simply.
Removing the device using in operation S50 is not so large device, therefore can be fit in the production line of arbitrary operation in above-mentioned S10～S40.For example, if will be through bonding process S40 and the reeling end configuration slot device that batches of polarizability stacked film, can limit batch polarizability stacked film limit and carry out slot.
In addition, can certainly not be fit in the production line of arbitrary operation in above-mentioned S10～S40, and be arranged on independently and remove the device using in operation S50 with these operations.As such example, can enumerate in the device that is called as rewinder etc. of the recoil of carrying out roller (volume I for え) etc. slot device etc. is set.
The polarizability stacked film that film Width two end portions can be removed directly uses as polarization key element, and (for the aftermentioned stripping process S60) intermediate of the polarization plates that also comprises layer of polarizer and diaphragm as making and useful.
The manufacture method > of < polarization plates
The manufacture method of polarization plates of the present invention comprise prepare above-mentioned polarizability film operation, bonding process S40, remove operation S50 and stripping process S60 (with reference to Fig. 1).About the operation beyond stripping process S60, due to same as described above thereby save explanation.The method according to this invention; identical with the situation of polarizability stacked film, can stably manufacture the polarization plates excellent in adhesion that prevents the pollutions of compression bonding apparatus such as the doubling roller that overflows, accompanies therewith of bonding agent and the pollution on film surface and layer of polarizer and diaphragm.
(6) stripping process S60
With reference to Fig. 4, this operation is: from through removing operation S50 and the polarizability stacked film that has been removed of Width two end portions peel off and remove base material film 100, thereby at least obtain being fitted with in layer of polarizer 110 operation of the 1st polarization plates of the 1st diaphragm 200.
Example shown in Fig. 4; be formed with layer of polarizer 110 on the two sides of base material film 100; when in bonding process S40, the 2nd diaphragm 300 is fitted on polarizability film via the 2nd bond layer 350; can obtain 2 polarization plates by this operation;, above-mentioned the 1st polarization plates and be fitted with the 2nd polarization plates of the 2nd diaphragm 300 in layer of polarizer 110.Only, in the time that a face (only the 1st diaphragm 200 sides) of base material film 100 is formed with layer of polarizer 110, obtain 1 polarization plates (the 1st polarization plates) by this operation.
Lift-off processing is carried out on the polarizability stacked film limit that this operation can also be transported through removing the long size that operation S50 obtains by limit continuously, or by first batching as roller shape through the polarizability stacked film of removing the long size that operation S50 obtains, limit is carried out polarizability stacked film continuously lift-off processing and is implemented continuously in debatching limit continuously from this roll body.
Peel off the method for removing base material film and be not particularly limited, can peel off by the same method of stripping process with the separator (stripping film) that the common polarization plates with bonding agent is carried out.
Fig. 5 is the figure that represents an example of the stripping means of the base material film in stripping process S60, is the vertical view that schematically represents the relation of the direction of delaminate of base material film and the direction of orientation of layer of polarizer.In Fig. 5, peel off base material film 600 from polarizability stacked film 500, form the 1st polarization plates 700 that comprises the 1st diaphragm and layer of polarizer.In Fig. 5, be omitted in the 2nd diaphragm stacked on base material film 600.
Represent the direction of orientation of layer of polarizer by arrow A, represent the direction of delaminate of base material film 600 by arrow B, the direction of delaminate (arrow B) of base material film 600 represents with θ with direction of orientation (arrow A) angulation of layer of polarizer.Now, preferably taking: the direction of delaminate (arrow B) of base material film 600 with direction of orientation (arrow A) the angulation θ of layer of polarizer as 20 degree below, be preferably 10 degree below, more preferably 5 spend below the mode of (for example 0 spends) peel off.By taking angle θ the mode below 20 degree peel off, can layer of polarizer produce cohesion destroy, can peel off gallantly and successfully base material film 600.The direction of orientation of layer of polarizer is the direction that the main chain of the polyvinyl alcohol resin of formation layer of polarizer is arranged by stretching, and is the highest direction of refractive index in the face of layer of polarizer.
In addition as shown in Figure 6, at the pick-up point C of base material film 600 and the 1st polarization plates 700, polarizability stacked film 500 and the 1st polarization plates 700 angulations before preferably peeling off with base material film be less than base material film and peel off front polarizability stacked film 500 and base material film 600 angulations mode peel off base material film 600. be preferably below 45 degree, more preferably 0 degree.By with further with the mode of degree is peeled off base material film 600, and the cohesion that can be suppressed at layer of polarizer generation destroys and successfully peel off base material film 600.
In Fig. 6, represent at pick-up point C polarizability stacked film 500 with base material film 600 and the 1st polarization plates 700 appearance that in the opposite direction mode of angulation is peeled off, but also can peel off in the mode of same direction angulation with base material film 600 and the 1st polarization plates 700 polarizability stacked film 500 at pick-up point C, now, about angle and above-mentioned condition also effective.
Above, with reference to Fig. 5 and Fig. 6, the method that obtains the 1st polarization plates to peeling off base material film from polarizability stacked film is narrated, but when peeling off base material film and obtain the 2nd polarization plates from polarizability stacked film too.Take out the not special system limit of order of the operation of the 1st polarization plates and the operation of taking-up the 2nd polarization plates from polarizability stacked film.
As above the polarization plates of manufacturing can be used as the blooming use that is laminated with other optical layers in the time of practicality.In addition, said protection film also can have the function of these optical layers.As other optical layers, the reflective polarizing film that can enumerate certain polarized light of transmission, the polarized light that shows the character contrary with it is reflected; There is the film with anti-dazzle function of concaveconvex shape on surface; The film of belt surface anti-reflective function; There is the reflectance coating of reflection function on surface; Have the Transflective film of reflection function and transmission function concurrently; Compensation film for angular field of view etc.
As the suitable commercially available product of the reflective polarizing film reflecting with certain polarized light of transmission, by the polarized light that shows the character contrary with it, can enumerate for example " DBEF " (3M company system, can start with from Sumitomo 3M (strain)), " APF " (3M company system can be started with from Sumitomo 3M (strain)).
As compensation film for angular field of view, can enumerate at substrate surface coating fluid crystallinity compound the optical compensation films being orientated, the phase retardation film that comprises polycarbonate-based resin, the phase retardation film that comprises cyclic polyolefin hydrocarbon system resin.
As the commercially available product being equivalent at substrate surface coating fluid crystallinity compound the optical compensation films that has been orientated, can enumerate " WV FILM " (Fujiphoto (strain) system), " NH FILM " (Nippon Oil(Nippon Mitsubishi Oil) (strain) system), " NR FILM " (Nippon Oil(Nippon Mitsubishi Oil) (strain) system) etc.
As the commercially available product suitable with the phase retardation film that comprises cyclic polyolefin hydrocarbon system resin, can enumerate " Arton film " (JSR (strain) system), " ESCENA " (ponding chemical industry (strain) system), " ZEONOR FILM " (Japanese auspicious father-in-law (strain) system) etc.
Embodiment
Below, illustrate that embodiment further specifically describes the present invention, but the present invention is not limited to these examples.
< embodiment 1>
(1) making of base material film
Make random copolymers (Sumitomo Chemical (strain) system " SUMIMOTO NOBLENE W151 " at the propylene/ethylene of the ethylene unit by containing 5 % by weight of having an appointment by using the coextrusion of multilayer extrusion forming machine to be shaped, fusing point Tm=138 DEG C) both sides of resin bed that form dispose by the homopolymer of propylene is the base material film roller (the coiling product of the base material film of long size) of the 3-tier architecture of the resin bed that forms of homo-polypropylene (Sumitomo Chemical (strain) system " SUMIMOTO NOBLEN EFLX80E4 ", fusing point Tm=163 DEG C).The aggregate thickness of base material film is 100 μ m, and the Thickness Ratio (FLX80E4/W151/FLX80E4) of each layer is 3/4/3.
(2) formation of undercoat and polyvinyl alcohol resin layer
Pva powder (99.5 % by mole of Japanese synthetic chemical industry (strain) system " Z-200 ", average degree of polymerization 1100, average saponification degrees) is dissolved in to the hot water of 95 DEG C, prepares the polyvinyl alcohol water solution of concentration 3 % by weight.In the aqueous solution obtaining, mix 5 weight portion crosslinking chemicals (Sumitomo Chemical (strain) system " Sumirez Resin 650 ") and obtain coating liquid for undercoat layer with respect to pva powder 6 weight portions.
In addition, pva powder (98.0～99.0 % by mole of Kuraray (strain) system " PVA124 ", average degree of polymerization 2400, average saponification degrees) is dissolved in to the hot water of 95 DEG C, the polyvinyl alcohol water solution of preparation concentration 8 % by weight.
Then, the base material film roller that limit obtains from above-mentioned (1) is implemented corona treatment in Dui Qi two sides in debatching limit continuously by base material film, then the two sides after corona treatment is used intaglio plate coating machine to be coated with continuously above-mentioned coating liquid for undercoat layer, make its dry 10 minutes at 80 DEG C, made thus the film of the undercoat on two sides with thickness 0.2 μ m.
And then, film is transported on limit, and limit is used comma coating machine on the undercoat on two sides, to be coated with continuously above-mentioned polyvinyl alcohol water solution, makes its dry 5 minutes at 80 DEG C, has formed thus the polyvinyl alcohol resin layer of thickness 10.6 μ m on the undercoat on two sides.Now, by the Width inward at both ends side from base material film respectively the part of 1cm make the uncoated area of uncoated polyvinyl alcohol water solution.This film is first batched as roller shape.
(3) making of stretched film
Limit from the film roller being obtained by above-mentioned (2) by film debatching continuously, limit is cut off the uncoated area of polyvinyl alcohol resin layer to remove continuously by the slot method that uses razor blade, then use between roller aerial stretching device to carry out free end uniaxial tension with the multiplying powers of 5.8 times and make the stretched film of thickness 65.5 μ m to longitudinal direction (film carriage direction) at the draft temperature of 160 DEG C, batched and obtain stretched film roller.
(4) making of polarizability film
The stretched film roller that limit obtains from above-mentioned (3) is by stretched film debatching continuously, the residence time that limit is flooded stretched film about 150 seconds in the staining solution of 30 DEG C that contain iodine and potassium iodide is carried out the dyeing processing of polyvinyl alcohol resin layer, then, with the remaining staining solution of pure water rinsing of 10 DEG C.The residence time of then, flooding about 600 seconds in the crosslinker solution of 76 DEG C that contain boric acid and potassium iodide is carried out crosslinking Treatment.Afterwards, clean 4 seconds with the pure water of 10 DEG C, 80 DEG C dry 300 seconds, make thus the polarizability film with layer of polarizer, batched and obtained polarizability film roller.
(5) making of polarizability stacked film
Pva powder ((strain) Kuraray system " KL-318 ", average degree of polymerization 1800) is dissolved in to the hot water of 95 DEG C, has prepared the polyvinyl alcohol water solution of concentration 3 % by weight.In the aqueous solution obtaining, mix 1 weight portion crosslinking chemical (Sumitomo Chemical (strain) system " Sumirez Resin 650 ") with respect to pva powder 2 weight portions, make adhesive solution.
Then; the polarizability film roller obtaining from above-mentioned (4) is by the debatching continuously of polarizability film; and from the 1st diaphragm roller by the 1st diaphragm (transparent protective film (Konica Minolta (strain) system " KC4UY ") being formed by triacetyl cellulose (TAC)) debatching continuously, from the 2nd diaphragm roller by the 2nd diaphragm (same with the 1st diaphragm) debatching continuously.Then; the binding face of the 1st and the 2nd diaphragm is implemented after saponification processing; (charging) above-mentioned adhesive solution limit is supplied with at folded the 1st diaphragm of a surface layer of polarizability film, at folded the 2nd diaphragm of another surface layer in limit between two diaphragms and layer of polarizer; duplexer is passed through between a pair of doubling roller; carry out thus crimping, carried out the continuous laminating of the 1st and the 2nd diaphragm.
As the 1st and the 2nd diaphragm; use width than the film of the wide 8.0cm of polarizability film, with the Width center of the 1st and the 2nd diaphragm mode consistent with the Width center of polarizability film carried out fitting (therefore the 1st and the 2nd diaphragm in Width two end portions from respectively outstanding 4.0cm laterally of polarizability film).
In addition, in when laminating, lay respectively at the Width two ends of two bond layers polarizability film Width two ends more lateral and be positioned at the mode of the inside at the Width two ends of the 1st and the 2nd diaphragm, adjusted the quantity delivered of the adhesive solution of both sides.
Follow afterwards, make its dry 5 minutes and make polarizability stacked film at 80 DEG C, batched and obtain polarizability stacked film roller.This polarizability stacked film is made up of these 9 layers of 1st diaphragm/bond layer/layer of polarizer/undercoat/base material film/undercoat/layer of polarizer/bond layer/2nd diaphragms.
In the polarizability stacked film obtaining, do not observe bonding agent from film end overflow and bonding agent to the 1st, the adhering to of the outer surface of the 2nd diaphragm, be good state.In addition, do not observe for doubling roller the pollution that bonding agent causes yet.
(6) making of polarization plates
The polarizability stacked film roller that limit obtains from above-mentioned (5) is by the debatching continuously of polarizability stacked film, and limit is cut off the 1st diaphragm and the 2nd diaphragm to remove continuously by the slot method that uses razor blade via the direct bonding part of bond layer.
Then base material film is peeled off continuously, removed at base material film/undercoat interface afterwards, obtain the polarization plates of the formation of two both sides at base material film stacked " (the 1st or the 2nd) diaphragm/bond layer/layer of polarizer/undercoat ".While peeling off base material film, at any base material film/undercoat interface, by the above-mentioned angle θ of the pick-up point of base material film and polarization plates, be set to respectively 0 degree, 0 degree, 45 degree left and right.Can peel off with comparalive ease base material film.
< comparative example 1>
Make polarizability film roller by the method for recording in (1)～(4) of embodiment 1.
From this polarizability film roller by the debatching continuously of polarizability film; and from the 1st diaphragm roller by the 1st diaphragm (transparent protective film (Konica Minolta (strain) system " KC4UY ") being formed by triacetyl cellulose (TAC)) debatching continuously, from the 2nd diaphragm roller by the 2nd diaphragm (with the 1st diaphragm similarly) debatching continuously.Then; the binding face of the 1st and the 2nd diaphragm is implemented after saponification processing; limit is supplied with the identical adhesive solution limit of adhesive solution using in (charging) and embodiment 1 and is folded the 1st diaphragm, folds the 2nd diaphragm at another surface layer at a surface layer of polarizability film between two diaphragms and layer of polarizer; duplexer is passed through between a pair of doubling roller; carry out thus crimping, carried out the continuous laminating of the 1st and the 2nd diaphragm.
As the 1st and the 2nd diaphragm; use and the film of polarizability film same widths, with the Width center mode consistent with the Width center of polarizability film of the 1st and the 2nd diaphragm fit (therefore the 1st and the end face of the 2nd diaphragm and the end face of polarizability film consistent).
In the time of laminating, the mode that spreads all over the amount of the whole binding face of polarizability film to become bonding agent has been adjusted the quantity delivered of the adhesive solution of both sides in addition.But, although adjusted the quantity delivered of such adhesive solution, the fluctuation of the quantity delivered of the wriggling of the film when transporting, adhesive solution, bonding agent bit by bit overflows from film Width end and is attached to doubling roller.The bonding agent that is attached to doubling roller when film is fitted to tens of m starts to be transferred to the 1st and the outer surface of the 2nd diaphragm, and the pollution on this surface starts significantly.
Follow afterwards, make its dry 5 minutes at 80 DEG C, obtain thering is the polarizability stacked film that the layer identical with embodiment 1 forms.
Bond layer to the polarizability stacked film obtaining is confirmed; result; although adjusted the quantity delivered of adhesive solution as above; but except the part of overflowing from film Width end, also see that the end of bond layer is present in the part of the inside of film Width end (not having the part of bond layer between layer of polarizer and diaphragm).Due to the difference of the dry contraction of accompanying with the unevenness of such bond layer, there is wave in the Width end of polarizability stacked film.
Then, above-mentioned polarizability stacked film is batched as after roller shape, by the debatching of polarizability stacked film; result; owing to being transferred to the bonding agent of outer surface of diaphragm, in the region of film end, film is fitted each other, and in the time of debatching, this bonding agent cohesion destroys and stay white cohesion depredation.In addition, tension force when debatching is also unstable.
Then, polarizability stacked film from debatching is attempted peeling off base material film, and result, itself is possible although peel off, and the direction of delaminate moment while peeling off due to the wave of film end changes, and tension force is unstable thereby cannot successfully peel off.
Symbol description
100,600 base material films, 110 layer of polarizer, 120,130 uncoated area, 200 the 1st diaphragms, 250 the 1st bond layers, 300 the 2nd diaphragms, 350 the 2nd bond layers, 500 polarizability stacked films, 700 the 1st polarization plates.

Claims (5)

1. a manufacture method for polarizability stacked film, it comprises:
Prepare the operation of polarizability film, described polarizability film possesses the layer of polarizer that polyvinyl alcohol resin layer forms and width is identical or narrower than the width of described base material film with the width of described base material film that is had dichromatism pigment by absorption orientation at least one face of base material film, and
Obtain the operation of polarizability stacked film; wherein; in the layer of polarizer that the described face at base material film arranges on a face of described polarizability film, configure width the 1st diaphragm wider than described polarizability film via the 1st bond layer; on another face of described polarizability film, configure width 2nd diaphragm wider than described polarizability film
Configure in the following manner the described the 1st and the 2nd diaphragm: the Width two ends of the described the 1st and the 2nd diaphragm lay respectively at the more lateral at the Width two ends of described polarizability film, simultaneously the Width two ends of described the 1st bond layer lay respectively at described polarizability film Width two ends more lateral and be positioned at the inside at the Width two ends of the described the 1st and the 2nd diaphragm.
2. the manufacture method of polarizability stacked film according to claim 1, it further comprises following operation:
After the operation of configuration the described the 1st and the 2nd diaphragm; cut off in the position at the Width two ends of described layer of polarizer or than the position of the inside, position at the Width two ends of described layer of polarizer, thus the Width two end portions of described polarizability stacked film is removed.
3. the manufacture method of polarizability stacked film according to claim 1, wherein,
The operation of preparing described polarizability film comprises:
By be coated with at least one face of described base material film operation that the coating fluid that contains polyvinyl alcohol resin forms polyvinyl alcohol resin layer,
By have polyvinyl alcohol resin layer base material film uniaxial tension operation and
With dichromatism pigment, the polyvinyl alcohol resin layer dyeing of the film after uniaxial tension is made to the operation of layer of polarizer.
4. a manufacture method for polarization plates, it comprises:
Prepare the polarizability stacked film manufactured by method claimed in claim 2 operation and
Peel off and remove described base material film from described polarizability stacked film, obtain being fitted with in described layer of polarizer the operation of the 1st polarization plates of described the 1st diaphragm.
5. the manufacture method of polarization plates according to claim 4, wherein,
Described polarizability film possesses described layer of polarizer on the two sides of described base material film,
In the operation of configuration the described the 1st and the 2nd diaphragm; described the 2nd diaphragm configures in the following manner: on another face of described polarizability film, configure via the 2nd bond layer; the Width two ends of described the 2nd bond layer lay respectively at described polarizability film Width two ends more lateral and be positioned at the inside at the Width two ends of the described the 1st and the 2nd diaphragm
Peel off and remove described base material film from described polarizability stacked film, obtain described the 1st polarization plates and be fitted with the 2nd polarization plates of described the 2nd diaphragm in described layer of polarizer.
CN201280068747.XA 2012-02-01 2012-02-01 The manufacture method of polarizability stacked film and the manufacture method of polarization plates Active CN104081232B (en)

Applications Claiming Priority (1)

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* Cited by examiner, † Cited by third party
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JP6867126B2 (en) * 2015-11-04 2021-04-28 日東電工株式会社 A polarizing plate with an adhesive layer, an image display device, a method for bonding the polarizing plates, and a method for manufacturing a polarizing plate with an adhesive layer.
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KR102585712B1 (en) * 2019-01-11 2023-10-10 삼성디스플레이 주식회사 Protective film, manufacturing method thereof, and manufacturing method of display device using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1192725A (en) * 1997-09-19 1999-04-06 Nippon Synthetic Chem Ind Co Ltd:The Adhesive tape for splicing sheet or film
CN1408807A (en) * 2001-09-26 2003-04-09 日本合成化学工业株式会社 Method for producing emulsion type adhesive composition
CN1754902A (en) * 2004-09-27 2006-04-05 日东电工株式会社 Production method of film laminates and production apparatus used therein
JP2010117516A (en) * 2008-11-12 2010-05-27 Nitto Denko Corp Method for producing polarizing plate, polarizing plate, optical film and image display
WO2011125957A1 (en) * 2010-03-31 2011-10-13 住友化学株式会社 Method for producing laminate film, method for producing polarizing laminate film, and method for producing polarizing plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1192725A (en) * 1997-09-19 1999-04-06 Nippon Synthetic Chem Ind Co Ltd:The Adhesive tape for splicing sheet or film
CN1408807A (en) * 2001-09-26 2003-04-09 日本合成化学工业株式会社 Method for producing emulsion type adhesive composition
CN1754902A (en) * 2004-09-27 2006-04-05 日东电工株式会社 Production method of film laminates and production apparatus used therein
JP2010117516A (en) * 2008-11-12 2010-05-27 Nitto Denko Corp Method for producing polarizing plate, polarizing plate, optical film and image display
WO2011125957A1 (en) * 2010-03-31 2011-10-13 住友化学株式会社 Method for producing laminate film, method for producing polarizing laminate film, and method for producing polarizing plate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN107003464B (en) * 2014-12-12 2020-05-19 住友化学株式会社 Polarizing film manufacturing method and polarizing film
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CN108349232A (en) * 2015-10-22 2018-07-31 住友化学株式会社 The manufacturing method of laminated optical film
CN108349232B (en) * 2015-10-22 2020-09-25 住友化学株式会社 Method for manufacturing laminated optical film
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CN114144707A (en) * 2019-07-22 2022-03-04 日东电工株式会社 Method for manufacturing thin circular polarizing plate

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