CN104081232B - The manufacture method of polarizability stacked film and the manufacture method of polarization plates - Google Patents
The manufacture method of polarizability stacked film and the manufacture method of polarization plates Download PDFInfo
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- CN104081232B CN104081232B CN201280068747.XA CN201280068747A CN104081232B CN 104081232 B CN104081232 B CN 104081232B CN 201280068747 A CN201280068747 A CN 201280068747A CN 104081232 B CN104081232 B CN 104081232B
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Abstract
The present invention provides the manufacture method of a kind of manufacture method of polarizability stacked film and the polarization plates using the polarizability stacked film obtained by this method, and the manufacture method of the polarizability stacked film includes：Prepare the process for possessing the polarizability film of polarizer layer on base material film, the process for configuring width 1st diaphragm wider than polarizability film via the 1st bond layer on the polarizer layer of polarizability film and width 2nd diaphragm wider than polarizability film being configured on another face of polarizability film, the 1st and the 2nd diaphragm is configured in the following manner：The width two ends of 1st and the 2nd diaphragm are respectively positioned at the more lateral at the width two ends of polarizability film, while the width two ends of the 1st bond layer are located at the more lateral at the width two ends of polarizability film and positioned at the inside at the width two ends of the 1st and the 2nd diaphragm respectively.
Description
Technical field
The present invention relates to the manufacture method of polarizability stacked film and the manufacture method of polarization plates.
Background technology
Feed element of the polarization plates as the polarised light in liquid crystal display device and the detecting element as polarised light and
It is widely used.In the past, polyethenol series polarizing coating was mainly used in as polarization plates to fit comprising three second by bonding agent
The polarization plates of the diaphragm of acyl cellulose etc., in recent years, along with the subnotebook PC to liquid crystal display device,
Development in the mobile devices such as mobile phone and the development to large-scale tv machine etc., it is desirable to polarization plates light thin-wall.
For example in Japanese Unexamined Patent Publication 2000-338329 publications (patent document 1), the side for manufacturing slim polarization plates is used as
Method, is disclosed：After resin bed is formed to the solution that the one side coating of base material film contains polyvinyl alcohol resin, single shaft is carried out
Stretching, then dyes, thus obtains the film with polarizer layer, is fitted protect by bonding agent in the polarizer layer side of the film afterwards
Cuticula, is made after polarizability stacked film, peels off the manufacture method for the polarization plates for removing base material film.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2000-338329 publications
The content of the invention
The invention problem to be solved
For the fitting of film and diaphragm with polarizer layer, typically these film layers are folded by bonding agent, will
To layered product such as from layered product crimping is carried out by between a pair of doubling rollers.But in the crimping of layered product
When, bonding agent overflows (spilling) from its width end, there is the contaminated problem of the compression bonding apparatus such as doubling roller.The problem exists
Continuously manufacture especially serious when polarizability stacked film, the polarization plates of long size using the base material film and diaphragm of long size, at this
In continuous manufacture, the bonding agent for being attached to the compression bonding apparatus such as doubling roller is gradually needed on the outer surface of above-mentioned layered product (with pressure
The contact surface of connection device), polarizability stacked film and polarization plates are contaminated in itself.
On the other hand, in order to suppress bonding agent from the spilling of layered product end, if reducing the quantity delivered of bonding agent, in stacking
During the crimping of body, bonding agent is not present in the two end portions of width, then can occur poor attachment in the two end portions.
Therefore it is an object of the invention to provide fit diaphragm when, can prevent film two end portions poor attachment,
And prevent compression bonding apparatus, the polarizability stacked film of the pollution on film surface and the manufacture method of polarization plates caused by bonding agent.
The means to solve the problem
The present invention includes the description below.
[1] a kind of manufacture method of polarizability stacked film, it includes：
Prepare the process of polarizability film, the polarizability film possesses at least one face of base material film has two by gas absorption quantity
The polyvinyl alcohol resin layer of color pigment is constituted and width is identical with the width of the base material film or wider than the base material film
The narrow polarizer layer of degree, and
The process for obtaining polarizability stacked film, wherein, i.e. described in base material film on a face of the polarizability film
Width 1st diaphragm wider than the polarizability film is configured via the 1st bond layer on the polarizer layer that one face is set, in institute
State and width 2nd diaphragm wider than the polarizability film configured on another face of polarizability film,
The the 1st and the 2nd diaphragm is configured in the following manner：The width two ends difference of 1st and the 2nd diaphragm
More lateral positioned at the width two ends of the polarizability film, while the width two ends difference of the 1st bond layer
More lateral positioned at the width two ends of the polarizability film and the width two ends positioned at the 1st and the 2nd diaphragm
Inside.
[2] manufacture method of the polarizability stacked film according to [1], it further comprises following processes：In configuration institute
After the process for stating the 1st and the 2nd diaphragm, in the position at the width two ends of the polarizer layer or than the polarizer layer
Width two ends position inside position cut-out, thus by the width two end portions of the polarizability stacked film
Remove.
[3] manufacture method of the polarizability stacked film according to [1], wherein,
Preparing the process of the polarizability film includes：
Poly- second is formed containing the coating fluid of polyvinyl alcohol resin by the coating at least one face of the base material film
The process of enol resin,
By with polyvinyl alcohol resin layer base material film uniaxial tension process and
The polyvinyl alcohol resin layer of the film after uniaxial tension is dyed and is made with dichroism pigment the work of polarizer layer
Sequence.
[4] a kind of manufacture method of polarization plates, it includes being ready to pass through the polarizability stacked film of the method manufacture described in [2]
Process and
Peeled off from the polarizability stacked film and remove the base material film, obtain being fitted with the described 1st in the polarizer layer
The process of 1st polarization plates of diaphragm.
[5] manufacture method of the polarization plates according to [4], wherein, the polarizability film is on the two sides of the base material film
Possess the polarizer layer,
In the process for configuring the 1st and the 2nd diaphragm, the 2nd diaphragm is configured in the following manner：Described inclined
Configured on another face of shaking property film via the 2nd bond layer, the width two ends of the 2nd bond layer are located at institute respectively
State the more lateral at the width two ends of polarizability film and positioned at the interior of the width two ends of the 1st and the 2nd diaphragm
Side,
Peeled off from the polarizability stacked film and remove the base material film, obtain the 1st polarization plates and in the polarizer
Layer is fitted with the 2nd polarization plates of the 2nd diaphragm.
Invention effect
Method according to the invention it is possible to which being formed prevents bonding agent from the spilling of film end and in polarizability film with protecting
The whole binding face of cuticula is formed uniformly bond layer.Therefore according to the polarizability stacked film of the present invention and the side of polarization plates
Method, when fitting diaphragm, the poor attachment of film two end portions can be prevented and prevent compression bonding apparatus caused by bonding agent,
The pollution on film surface.
Brief description of the drawings
Fig. 1 is the preferred of the manufacture method of the manufacture method and polarization plates that represent polarizability stacked film involved in the present invention
The flow chart of embodiment.
Fig. 2 is the oblique view of one for showing schematically bonding process.
Fig. 3 is to represent to have fitted in polarizability film in bonding process the outline of one of the state of the 1st and the 2nd diaphragm
Top view.
Fig. 4 is the summary section of the IV-IV lines shown in Fig. 3.
Fig. 5 is the relation of the differently- oriented directivity for the peeling direction and polarizer layer for showing schematically the base material film in stripping process
Top view.
Fig. 6 is to show schematically polarizability stacked film and the 1st polarization plates angulation at pick-up pointP and polarizability
Stacked film and base material film angulationRelation side view.
Embodiment
Hereinafter, manufacture of the embodiment to the manufacture method and polarization plates of polarizability stacked film involved in the present invention is shown
Method is described in detail.
<The manufacture method of polarizability stacked film>
Fig. 1 is the preferred of the manufacture method of the manufacture method and polarization plates that represent polarizability stacked film involved in the present invention
The flow chart of embodiment.
The manufacture method of the polarizability stacked film of present embodiment includes successively：Prepare at least one mask in base material film
The process of the polarizability film of standby polarizer layer；What is set on a face of polarizability film in the said one face of base material film is inclined
Shake on lamella via the laminating of the 1st bond layer, the 1st diaphragm of configuration, the 2nd diaphragm is configured on another face of polarizability film
And obtain the bonding process S40 of polarizability stacked film；The removing work that the width two end portions of polarizability stacked film are removed
Sequence S50.
In addition, in the present embodiment, prepare the process of above-mentioned polarizability film includes successively：In at least one of base material film
Face forms the resin bed formation process S10 of polyvinyl alcohol resin layer；By the base material film single shaft with polyvinyl alcohol resin layer
The stretching process S20 of stretching；It is made with the polyvinyl alcohol resin layer of the film after uniaxial tension is dyed with dichroism pigment
The dyeing process S30 of polarizer layer.
In above-mentioned bonding process S40, the 1st and the 2nd diaphragm uses the width diaphragm wider than polarizability film.1st,
2 diaphragms are configured in the way of being located at the more lateral at the width two ends of polarizability film respectively by their width two ends
On polarizability film.Now, it is located at the width two ends of polarizability film more respectively with the width two ends of the 1st bond layer
The mode of outside and inside positioned at the width two ends of the 1st and the 2nd diaphragm adjusts the width of the 1st bond layer.
, in the present embodiment, can be by from implementing to obtained by removal step S50 it should be noted that as described later
Polarizability stacked film after width two end portions are removed peels off removing base material film and obtains polarization plates (stripping process
S60)。
Hereinafter, each operation for S10~S50 that the manufacture method to the polarizability stacked film of present embodiment possesses is more detailed
Carefully illustrate.
(1) resin bed formation process S10
This process is the process that polyvinyl alcohol resin layer is formed at least one surface of base material film.The polyvinyl alcohol
Resin is stretched process S20 and dyeing process S30 and the layer as polarizer layer.Can be by from by long size
The roll body of base material film winding is continuously formed polyethenol series tree continuously by base material film debatching on the base material film of debatching
Lipid layer continuously implements this process.
Can be by the way that in base material film surface, the coating solution containing polyvinyl alcohol resin be made into coating layer as needed
Dry to form polyvinyl alcohol resin layer.Using such method, polyvinyl alcohol resin layer and polarizer layer can be made
Thickness diminish, it is therefore favourable for the slimming of polarizability stacked film and polarization plates.
The method of applied coating solution can be from roller rubbing methods such as bar rubbing method, reversion rubbing method, gravure coating process；Die slot
Rubbing method；Comma rubbing method；Lip coating；Method of spin coating；Silk screen rubbing method；Fountain type rubbing method；Infusion process；Or spray-on process etc.
Known method is suitably selected.
In order that the adaptation of base material film and polyvinyl alcohol resin layer is improved, can be in base material film and polyethenol series tree
Priming coat is set between lipid layer.From the viewpoint of adaptation, preferably by the tree containing polyvinyl alcohol resin and crosslinking agent etc.
Oil/fat composition formation priming coat.
In the process of applied coating solution, uncoated coating fluid can be set in the width two end portions of base material film
Uncoated area.Uncoated area can be from the width inward at both ends side of base material film distinguish more than 0.5cm and 20cm with
Under (be preferably below 10cm) region.By setting uncoated area, it can suppress what can be produced when coating layer is dried
The warpage of the width two end portions of base material film.For the uncoated area, in stretching process S20 or afterwards by film
When batching, because the wave for the fracture that can cause film is produced sometimes, therefore before stretching process S20 or stretching process S20
The batching of caudacoria before, remove uncoated area by cutting off.
By coating solution when the entire surface of base material film, polyvinyl alcohol resin layer (so that polarizer layer) width with
The width of base material film is identical.On the other hand, when setting above-mentioned uncoated area to carry out applied coating solution, polyvinyl alcohol resin layer
The width of (so that polarizer layer) becomes the narrow width than base material film.
Implement the drying of coating layer when coating fluid contains solvent in order to remove solvent from coating layer.According to the kind of solvent
Class sets drying temperature and drying time.Drying temperature is, for example, 50~200 DEG C, preferably 60~150 DEG C.Drying time example
Such as it is 2~20 points.
Polyvinyl alcohol resin layer can be formed only in a face of base material film, can also be formed on two sides, but due to can
It is favourable in terms of the productivity ratio raising of polarization plates to obtain 2 polarization plates from 1 polarizability stacked film, therefore preferably in base material
The two sides of film forms polyvinyl alcohol resin layer.Now, preferably above-mentioned priming coat is formed on the two sides of base material film.In addition, in base
When the two sides of material film forms polyvinyl alcohol resin layer, these polyvinyl alcohol resins layer is generally with the formation in base material film surface
The mode of position consistency is formed.
The thickness of polyvinyl alcohol resin layer is preferably more than 3 μm and less than 30 μm, more preferably 5~20 μm.If
For with the polyvinyl alcohol resin of the thickness in the range of this layer, then, can by aftermentioned stretching process S20 and dyeing process S30
With the polarizer layer that the dyeability for obtaining dichroism pigment is good and polarization characteristic is excellent and thickness is sufficiently small.If polyethylene
The thickness of alcohol resin more than 30 μm, then sometimes the thickness of polarizer layer more than 10 μm.
(coating fluid)
Above-mentioned coating fluid is preferably that the powder for making polyvinyl alcohol resin is dissolved in poly- second obtained by good solvent (such as water)
Enol system resin solution.As polyvinyl alcohol resin, such as polyvinyl alcohol resin and its derivative can be enumerated.It is used as polyethylene
The derivative of alcohol resin, in addition to polyvinyl formal, polyvinyl acetal etc., can also be enumerated with ethene, propylene etc.
Alkene；The unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid；The Arrcostab of unsaturated carboxylic acid；Acrylamide etc. is by poly- second
Material obtained by enol resin modified.In above-mentioned polyvinyl alcohol resin, polyvinyl alcohol resin is preferably used.
The average degree of polymerization of polyvinyl alcohol resin preferably 100~10000, more preferably 1000~10000.Polyethenol series
The mean saponification degree of resin is preferably 80~100 moles of %, more preferably 94 moles more than %.
Coating fluid can contain the additives such as plasticizer, surfactant as needed.As plasticizer, it can use many
First alcohol or its condensation product etc., such as can exemplify glycerine, two glycerine, triglycerin, ethylene glycol, propane diols, polyethylene glycol.It is excellent
The use level of additive is set to below 20 weight % of polyvinyl alcohol resin by choosing.
(base material film)
Base material film can include thermoplastic resin, wherein preferably comprising the transparency, mechanical strength, heat endurance, draftability
Etc. excellent thermoplastic resin.The concrete example of such thermoplastic resin includes such as chain polyolefin-based resins, cyclic polyolefin
The polyolefin-based resins such as hydrocarbon system resin (norbornene resin etc.)；Polyester based resin；(methyl) acrylic resin；Triacetic acid
The cellulose esters system such as cellulose esters, cellulose diacetate ester resin；Polycarbonate-based resin；Polyvinyl alcohol resin；Poly- acetic acid
Vinylester resin；Polyarylate system resin；Polystyrene resin；Polyether sulfone system resin；Polysulfones system resin；Polyamide series resin；
Polyimides system resins；And their mixture, copolymer etc..
From the flatness for applied coating solution is excellent and stretching process S20 in the reason, base such as draftability is excellent
Material film is preferably comprised selected from chain polyolefin-based resins, cyclic polyolefin hydrocarbon system resin, (methyl) acrylic resin and cellulose
Ester system resin it is at least one kind of.
Base material film can be the single layer structure being made up of 1 layer of resin bed comprising a kind or two or more thermoplastic resins,
Can be by the multilayer laminated sandwich construction of the resin bed comprising a kind or two or more thermoplastic resins.
As chain polyolefin-based resins, in addition to the homopolymer of the chain olefins such as polyvinyl resin, acrylic resin,
The copolymer for including two or more chain olefins can also be enumerated.Base material film comprising chain polyolefin-based resins is readily and stably
With preferred in terms of high magnification stretching.Wherein base material film more preferably (is used as poly- the third of the homopolymer of propylene comprising polypropylene-based resin
Olefine resin, copolymer based on propylene etc.), polyethylene-based resin is (as the polyvinyl resin of the homopolymer of ethene, with second
Alkene is copolymer of main body etc.) etc..
1 copolymer i.e. based on propylene of the example preferably used as the thermoplastic resin for constituting base material film
The copolymer that can be propylene and can be with the other monomers of its copolymerization.
As other monomers that can be with propylene copolymerization, such as ethene, alpha-olefin can be enumerated.As alpha-olefin, preferably use
The alpha-olefin of the alpha-olefin of carbon number more than 4, more preferably carbon number 4~10.The tool of the alpha-olefin of carbon number 4~10
Style straight-chain monoene hydro carbons such as including 1- butylene, 1- amylenes, 1- hexenes, 1- heptene, 1- octenes, 1- decene；3- methyl-
1- butylene, 3- Methyl-1-pentenes, the branched monoene hydro carbons such as 4-methyl-1-pentene；Vinyl cyclohexane etc..Propylene and can be with
The copolymer of the other monomers of its copolymerization can be random copolymer or block copolymer.
The content of above-mentioned other monomers is, for example, 0.1~20 weight %, preferably 0.5~10 weight % in the copolymer.
The content of other monomers can be according to the of " macromolecule analysis handbook " (nineteen ninety-five, Kinokuniya bookstore distribution) in copolymer
Method described in page 616, is obtained by carrying out infrared ray (IR) spectroscopic assay.
In above-mentioned, as polypropylene-based resin, the homopolymer of propylene, Propylene-ethylene random copolymer, third are preferably used
Alkene -1- butene random copolymers or propylene-ethylene -1- butene random copolymers.
The stereospecificity of polypropylene-based resin is preferably essentially isotaxy or syndiotaxy.Substantially by with complete
With vertical structure or the base material film of the polypropylene-based resin of syndyotactic stereospecificity composition, its preferable operability and in high temperature
Mechanical strength under environment.
Base material film can be made up of a kind of chain polyolefin-based resins, can also be by two or more chain polyolefin-based resins
Mixture constitute, can also be made up of the copolymer of two or more chain polyolefin-based resins.
Cyclic polyolefin hydrocarbon system resin is the general name for the resin being polymerized using cyclic olefin as polymerized unit, can be enumerated for example
In Japanese Unexamined Patent Publication 1-240517 publications, Japanese Unexamined Patent Publication 3-14882 publications, Japanese Unexamined Patent Publication 3-122137 publications etc.
Described in resin.If enumerating the concrete example of cyclic polyolefin hydrocarbon system resin, there are open loop (co) polymer, the ring-type of cyclic olefin
The copolymer (being typically random copolymer) of the chain olefin such as addition polymers, cyclic olefin and the ethene of alkene, propylene and use
Graft polymers and their hydride that they are modified by unsaturated carboxylic acid or derivatives thereof etc..Wherein, preferably make
It is used as cyclic olefin and has used the ENB system of the norborneol alkene monomers such as ENB, polycyclic norborneol alkene monomer
Resin.
Cyclic polyolefin hydrocarbon system resin it is commercially available various products., can as the example of the commercially available product of cyclic polyolefin hydrocarbon system resin
Enumerating trade name " Topas ", (TOPAS ADVANCED POLYMERS GmbH company systems can enter from treasured reason plastics (strain)
Hand), " Arton " (JSR (strain) systems), " ZEONOR " (Japanese auspicious father-in-law's (strain) system), " ZEONEX " (Japanese auspicious father-in-law's (strain) system),
" Apel " (Mitsui Chemicals (strain) system) etc..
Furthermore it is possible to by trade name " ESCENA (エ ス シ ー Na) " (ponding chemical industry (strain) system), " SCA40 "
(ponding chemical industry (strain) system), " the cyclic polyolefin hydrocarbon system tree of the film such as ZEONOR FILM " (Japanese auspicious father-in-law's (strain) system)
The commercially available product of adipose membrane is used as base material film.
Base material film can be made up of a kind of cyclic polyolefin hydrocarbon system resin, can also be by two or more cyclic polyolefin hydrocarbon system resins
Mixture constitute, can also be made up of the copolymer of two or more cyclic polyolefin hydrocarbon system resins.
Polyester based resin is the polymer with ester bond, the contracting generally comprising polybasic carboxylic acid or derivatives thereof with polyalcohol
The resin of polymers.2 yuan dicarboxylic acids or derivatives thereof can be used as polybasic carboxylic acid or derivatives thereof, can be enumerated for example to benzene
Dioctyl phthalate, M-phthalic acid, dimethyl terephthalate (DMT), naphthalene diformic acid dimethyl ester etc..2 yuan of glycol can be used as polynary
Alcohol, can be enumerated such as ethylene glycol, propane diols, butanediol, neopentyl glycol, cyclohexanedimethanol.
As the typical example of polyester based resin, can enumerate as terephthalic acid (TPA) and ethylene glycol condensation polymer it is poly- to benzene two
Formic acid glycol ester.Polyethylene terephthalate is crystalline resin, and crystallize before processing state it is poly- to benzene
Naphthalate easily implements the processing such as stretching so as to which draftability is more excellent.If necessary, can be by stretching when or drawing
Heat treatment after stretching etc. crystallizes it.In addition, the bone by further making other monomers and polyethylene terephthalate
Frame copolymerization and (or being made non-crystalline) copolymerization polyethylene terephthalate for reducing crystallinity are also due to draftability
It is excellent and preferably use.As the example of copolymerization polyethylene terephthalate, can enumerate for example by cyclohexanedimethanol,
Material of the copolymerization such as phthalic acid etc..
, can as the polyester based resin beyond polyethylene terephthalate and copolymerization polyethylene terephthalate
Enumerate polybutylene terephthalate (PBT), PEN, PBN, poly terephthalic acid three
Methylene ester, poly- naphthalenedicarboxylic acid Sanya methyl esters, polycyclohexylene's dimethyl ester, poly- naphthalenedicarboxylic acid cyclohexane dicarboxylates etc..
Base material film can be made up of a kind of polyester based resin, can also be made up of the mixture of two or more polyester based resins,
It can also be made up of the copolymer of two or more polyester based resins.
, can be using arbitrarily suitable (methyl) acrylic resin as (methyl) acrylic resin.(methyl) third
The concrete example of olefin(e) acid system resin include (methyl) acrylate poly- such as polymethyl methacrylate, methyl methacrylate-
(methyl) acrylic copolymer, methyl methacrylate-(methyl) acrylate copolymer, methyl methacrylate-acrylic acid
Ester-(methyl) acrylic copolymer, (methyl) acrylate-styrene copolymer (MS resins etc.), with alicyclic alkyl
Polymer (for example, methyl methacrylate-cyclohexyl methacrylate copolymer, methyl methacrylate-(methyl) propylene
Sour norborneol ester copolymer etc.).Preferably use poly- (methyl) the acrylic acid C such as poly- (methyl) methyl acrylate1-6Arrcostab, it is more excellent
Choosing uses the methacrylic acid using methyl methacrylate as principal component (50~100 weight %, preferably 70~100 weight %)
Methyl esters system resin.
Base material film can be made up of a kind of (methyl) acrylic resin, can also be by two or more (methyl) acrylic acid series
The mixture of resin is constituted, and can also be made up of the copolymer of two or more (methyl) acrylic resins.
Cellulose esters system resin is the ester of cellulose and aliphatic acid.It is fine that the concrete example of cellulose esters system resin includes triacetic acid
The plain ester of dimension, cellulose diacetate ester, three cellulose propionate esters, dipropionic acid cellulose esters etc..Among them, particularly preferred triacetic acid
Cellulose esters (triacetyl cellulose).Cellulose triacetate it is commercially available various products, also have in terms of easiness of starting with, cost
Profit.As the example of the commercially available product of cellulose triacetate, trade name " fujitac TD80 " (Fujiphotos (strain) can be enumerated
System), " fujitac TD80UF " (Fuji Photo Film (Ltd.)), " fujitac TD80UZ " (Fuji Photo Film (Ltd.)),
" fujitac TD40UZ " (Fuji Photo Film (Ltd.)), " KC8UX2M " (Konica Minolta (strain) system), " KC4UY " (Konica
Minolta (strain) is made) etc..
Base material film can be made up of a kind of cellulose esters system resin, can also be by the mixed of two or more cellulose esters systems resin
Compound is constituted, and can also be made up of the copolymer of two or more cellulose esters systems resin.
Polycarbonate-based resin is the engineering plastics for the polymer being bonded comprising monomeric unit by carbonate group, is
With high-impact, heat resistance, anti-flammability, transparent resin.Constitute base material film polycarbonate-based resin can be for
Reduction photoelastic coefficient and resin referred to as modified polycarbonate as after polymer backbone is modified, improve ripple
Copolymerization polycarbonate of long dependence etc..
Polycarbonate-based resin it is commercially available various products.As the example of the commercially available product of polycarbonate-based resin, it can enumerate
Trade name " panlite " (Supreme Being people's chemical conversion (strain) system), " lupiron " (Mitsubishi Engineering-Plastics (strain) system), " SD polyca "
(Sumitomo Tao Shi (strain) systems), " caliber (カ リ バ ー) " (DOW Chemical (strain) system) etc..
Base material film can be made up of a kind of polycarbonate-based resin, can also be by the mixed of two or more polycarbonate-based resins
Compound is constituted, and can also be made up of the copolymer of two or more polycarbonate-based resins.
Arbitrary appropriate additive can also be added in addition to above-mentioned thermoplastic resin in base material film.As so
Additive, such as ultra-violet absorber, antioxidant, lubricant, plasticizer, releasing agent, coloring preventing agent, fire-retardant can be enumerated
Agent, nucleator, antistatic additive, pigment and colouring agent etc..The content of thermoplastic resin in base material film is preferably 50~100 weights
Measure %, particularly preferably more preferably 50~99 weight %, more preferably 60~98 weight %, 70~97 weight %.Base
When the content of thermoplastic resin in material film is less than 50 weight %, it is possible to can not fully show thermoplastic resin and be had originally
Some high transparency etc..
The thickness of base material film can be determined suitably, but generally preferably 1~500 μ from the aspect of the workability such as intensity, operability
M, more preferably 1~300 μm, most preferably further preferred 5~200 μm, 5~150 μm.
In order that improved with the adaptation of polyvinyl alcohol resin layer, can be at least polyvinyl alcohol resin of base material film
The surface that layer forms side carries out sided corona treatment, corona treatment, flame treatment etc..
It should be noted that polyvinyl alcohol resin layer can also be by fitting on base material film in other embodiments
The film being made up of polyvinyl alcohol resin is formed, but now can be between film laminating in use bonding agent.Like this
During using the film being made up of polyvinyl alcohol resin, as the film being made up of polyvinyl alcohol resin, also use and base material film
Width is identical or width is than its narrow width and base material film for causing polarizer layer by film that polyvinyl alcohol resin is constituted
Width is identical or narrower than its.
(2) stretching process S20
This process is the process for carrying out uniaxial tension to the base material film with polyvinyl alcohol resin layer and obtaining stretched film.
This process can also be by continuously carrying out at stretching when being conveyed through the film of long size obtained by resin bed formation process S10
Reason, or by the way that the film by long size obtained by resin bed formation process S10 is first batched as roll, again side from the roll body by film
Continuously debatching side continuously carries out stretch processing continuously to implement.
The stretching ratio of film can suitably be selected according to desired polarization characteristic, but be preferably long relative to the original of film
More than 5 times and less than 17 times, more preferably more than 5 times and less than 8 times.If stretching ratio is less than 5 times, due to polyvinyl alcohol
Resin will not be fully orientated, therefore the degree of polarization of polarizer layer will not be uprised fully sometimes.On the other hand, stretching ratio surpasses
When crossing 17 times, then become easily to occur the fracture of film when stretching and the thickness of stretched film becomes too thin and exceeds demand, it is possible to after
The processability of process and operability reduction.
Stretch processing is not limited to the stretching of a step, can also be carried out with multistep.Now, the stretch processing of all multisteps all may be used
, can also be by the dye in the later stretch processing of second step and dyeing process S30 continuously to be carried out before dyeing process S30
Color processing and/or crosslinking Treatment are carried out simultaneously.When carrying out stretch processing like this with multistep, preferably with all steps of stretch processing
The mode for the stretching ratio for reaching more than 5 times after rapid carries out stretch processing.
Stretch processing except can be to film length direction (film carriage direction) stretch vertical stretching in addition to or to
The horizontal stretching of film width stretching or oblique pull are stretched.As vertical stretching mode, stretching, compression stretching etc. between roller can be enumerated, is made
For horizontal stretching mode, tenter (テ ン タ ー) method etc. can be enumerated.
Stretch processing can using wet tensile method, dry-stretch process it is any, can selected from wide scope
Dry-stretch process is preferably used in terms of selecting draft temperature.
Draft temperature is set as that polyvinyl alcohol resin layer and base material film general performance go out the stream for the degree that can be stretched
It is more than the temperature of dynamic property, the preferably scope of -30 DEG C of the phase inversion temperature of base material film~+30 DEG C, more preferably base material film
The scope of -25 DEG C of phase inversion temperature~+5 DEG C.The phase transfer temperature of base material film when the resin for constituting base material film is amorphous resin
Degree refers to glass transition temperature Tg, and fusing point (crystalline melt point) Tm is referred to when being crystalline resin, all according to JIS K 7121
Determine.When base material film includes multi-layer resinous layer, above-mentioned phase inversion temperature refers to the phase transfer temperature that the multi-layer resinous layer is shown
Highest phase inversion temperature in degree.
If draft temperature is set below into -30 DEG C of phase inversion temperature, it is difficult to the high magnification more than 5 times and draws
Stretch.If draft temperature exceedes+30 DEG C of phase inversion temperature, the mobility for having the tendency of base material film is excessive and stretches and becomes difficult.
Due to being easier to achieve over 5 times of high stretching ratio, therefore draft temperature is in above range, further preferably
For more than 120 DEG C.The temperature adjustment of stretch processing is typically based on the temperature adjustment of heating furnace.
(3) dyeing process S30
This process is to dye the polyvinyl alcohol resin layer of stretched film with dichroism pigment and make its gas absorption quantity, is made
The process of polarizer layer.Obtain being laminated with the polarizability film of polarizer layer by this process on base material film.This process may be used also
With by continuously carrying out dyeing processing when being conveyed through the stretched film of long size obtained by stretching process S20, or pass through will
Stretched film obtained by stretched process S20 first batches as roll, again while from the roll body by film continuously debatching while continuously enter
Row dyeing handles continuously to implement.
As dichroism pigment, such as can enumerate iodine, organic dyestuff.As the concrete example of organic dyestuff, for example, bag
Include red BR, red LR, red R, pink LB, magenta BL, BOKDEAUX GS, sky blue LG, lemon yellow, indigo plant BR, indigo plant 2R, dark blue RY, green LG,
Purple LB, purple B, black H, black B, black GSP, Huang 3G, Huang R, orange LR, orange 3R, dark red GL, dark red KGL, the purple BK of Congo red, jewel, activity
It is blue G, reactive blue GL, reactive orange GL, direct sky blue, direct everbright fast orange S, resistance to tanned etc..These dichroic substances can be only independent
It is used, or two or more may be used.
Dyeing process can integrally be entered by impregnating stretched film in the solution (staining solution) containing dichroism pigment
OK.As staining solution, the solution in a solvent by the dissolving of above-mentioned dichroism pigment can be used.It is used as staining solution
Solvent, typically using water, can also further add the organic solvent for having compatibility with water.The concentration of dichroism pigment is preferred
For 0.01~10 weight %, particularly preferably more preferably 0.02~7 weight %, 0.025~5 weight %.
In the case where using iodine as dichroism pigment, exist due to can further improve staining efficiency, therefore preferably
Iodide are further added in staining solution containing iodine.As iodide, can enumerate for example KI, lithium iodide, sodium iodide,
Zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc..Iodate in staining solution
The concentration of thing is preferably 0.01~10 weight %.In iodide, KI is preferably added.Add KI in the case of, iodine with
The ratio of KI with weight ratio meter preferably in the range of 1: 5~1: 100, more preferably in the range of 1: 6~1: 80, especially
It is preferred that in the range of 1: 7~1: 70.
Dip time of the stretched film in staining solution is usually the scope of 15 seconds~15 minutes, preferably 30 seconds~3 points
Clock.In addition, the temperature of staining solution is preferably 10~60 DEG C of scope, more preferably 20~40 DEG C of scope.
It should be noted that dyeing process S30 can also be carried out before or while stretching process S20, but in order to
The dichroism pigment for being adsorbed in polyvinyl alcohol resin layer is set to be orientated well, preferably the stretching in stretching process S20 is implemented
Implement dyeing process S30 after at least a portion of processing.As embodiment now, it can enumerate：1) entered with target multiplying power
After row stretch processing, it is not accompanied by stretch processing and implements dyeing process S30 mode, 2) stretched with the multiplying power lower than target
After processing, dyeing in dyeing process S30 processing (when dyeing process S30 includes crosslinking Treatment process, for dyeing processing and/
Or crosslinking Treatment) in, carry out stretch processing, 3 in the way of total multiplying power turns into target multiplying power) carried out with the multiplying power lower than target
After stretch processing, the dyeing processing in dyeing process S30 (when dyeing process S30 includes crosslinking Treatment process, is handled for dyeing
And/or crosslinking Treatment) in, carry out stretch processing to total multiplying power miss the mark multiplying power degree, then, with total multiplying power into
The mode etc. of stretch processing is carried out for the mode of target multiplying power.
The crosslinking Treatment process that dyeing process S30 can include then dyeing processing and implement.Crosslinking Treatment for example can be with
Carried out by the film after the dip dyeing in the solution (crosslinker solution) containing crosslinking agent.As crosslinking agent, can use with
Toward known material, for example, can enumerate：The boron compounds such as boric acid, borax or glyoxal, glutaraldehyde etc..Crosslinking agent can be only
Be used alone it is a kind of, can also and with two or more.
Crosslinker solution can be specially the solution by crosslinking agent dissolving in a solvent.As solvent, for example, it can make
With water, the organic solvent with water with compatibility can also be contained.The concentration of crosslinking agent in crosslinker solution is preferably 1~20 weight
Measure the scope of % scope, more preferably 6~15 weight %.
Crosslinker solution can contain iodide.By adding iodide, the polarization characteristic in the face of polarizer layer can be made
More homogenize.As iodide, such as KI, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, iodine can be enumerated
Change copper, barium iodide, calcium iodide, stannic iodide, titanium iodide etc..The concentration of iodide in crosslinker solution is preferably 0.05~15 weight
Measure %, more preferably 0.5~8 weight %.
Dip time of the film in crosslinker solution after dyeing is usually 15 seconds~20 minutes, preferably 30 seconds~15 points
Clock.In addition, the temperature of crosslinker solution is preferably in the range of 10~90 DEG C.
It should be noted that by coordinating crosslinking agent in staining solution, crosslinking Treatment can also be with dyeing processing simultaneously
Carry out.In addition, crosslinking Treatment can simultaneously be carried out with a part for stretch processing.Implement the tool of stretch processing in crosslinking Treatment
The mode of body is ibid.
It is preferred that carrying out matting and drying process after dyeing process S30, before bonding process S40.Matting
Generally include water matting.Water cleaning treatment can by the pure water such as ion exchange water, distilled water dip dyeing handle
Afterwards or after crosslinking Treatment film is carried out.Water cleaning temperature is usually 3~50 DEG C, is preferably 4~20 DEG C of scope.In water
Dip time be usually 2~300 seconds, be preferably 3~240 seconds.
Matting can be the combination of water matting and the matting using iodide solution.In addition, clear in water
Wash process and/or using the cleaning fluid used in the cleaning treatment of iodide solution in addition to containing water, can suitably contain
The liquid alcohols such as methanol, ethanol, isopropanol, butanol, propyl alcohol.
As the drying process carried out after matting, it can be appointed using natural drying, air-supply drying, heat drying etc.
The appropriate method of meaning.For example during heat drying, drying temperature is usually 20~95 DEG C, and drying time is usually 1~15 minute
Left and right.
(4) bonding process S40
This process is：On one face of the polarizability film for possessing polarizer layer in the one or two sides of base material film, in its institute
Via the laminating of the 1st bond layer, the 1st diaphragm of configuration on the polarizer layer having, on another face of polarizability film preferably
The process for configuring the 2nd diaphragm via the 2nd bond layer and obtaining polarizability stacked film.This process can also be transported by side and passed through
Polarizability film side obtained by dyeing process S30 is crossed from each roll body for winding the 1st of long size the and the 2nd diaphragm respectively will
1st and the 2nd diaphragm continuously debatching, and between polarizability film and the 1st diaphragm (or further in polarizability film and
Between 2 diaphragms) bonding agent is continuously fed continuously to be fitted, or polarized by that will pass through obtained by dyeing process S30
Property film is first batched as roll, then while from the roll body by polarizability film continuously debatching while from by the 1st and the 2nd diaphragm of long size
Each roll body of winding is respectively by the 1st and the 2nd diaphragm continuously debatching, and between polarizability film and the 1st diaphragm
(or further between polarizability film and the 2nd diaphragm) continuously feeds bonding agent continuously to be fitted and continuously real
Apply.
Hereinafter, 2~Fig. 4 of side reference picture, is carried out in detail while being enumerated by taking following embodiments as an example to bonding process S40
Describe in detail bright, the embodiment is：Polarizability film has polarizer layer on the two sides of base material film, and the 2nd protects in bonding process S40
Cuticula is fitted on polarizability film via the 2nd bond layer.
Fig. 2 is the oblique view of one for showing schematically bonding process S40.Fig. 3 is represented the 1st in bonding process S40
And the 2nd diaphragm fit in polarizability film state the approximate vertical view of one, be the formation for showing schematically bond layer
The figure in region.Other Fig. 4 is the summary section of the IV-IV lines shown in Fig. 3.
2~Fig. 4 of reference picture, as on base material film 100 be laminated polarizer layer 110 polarizability film a face,
The 1st diaphragm 200, the 2nd diaphragm 300 of another face laminating, are all used than polarizability film (in other words, base material film 100)
The wide film of width.That is, the width W of the 1st diaphragm 200 is met2>The width W of polarizability film (base material film 100)1, and meet the 2nd guarantor
The width W of cuticula 3003>The width W of polarizability film (base material film 100)1.It should be noted that Fig. 2~Fig. 4 indicate it is following
Example：The width two end portions used in base material film 100 are provided with the uncoated area 120,130 of uncoated coating fluid
The film in (region for not forming polarizer layer 110) is used as polarizability film.
In addition, for the 1st, the 2nd diaphragm 200,300, being located at polarizability film respectively with their width two ends
The mode of the more lateral at the width two ends of (base material film 100), respectively via the 1st bond layer being made up of bonding agent S
250th, polarizability film is fitted in by bonding agent T the 2nd bond layers 350 constituted.For the 1st and the 2nd diaphragm 200,300,
It can be laminated, fitted in their the width center mode consistent or substantially uniform with the width center of polarizability film.
It should be noted that binding temperature is usually 15~40 DEG C of scope.
Now, for the 1st bond layer 250 and the 2nd bond layer 350, position is distinguished with their width two ends
In the width two ends of polarizability film more lateral and positioned at the 1st and the 2nd diaphragm 200,300 width two ends more
The mode of inner side adjusts their width to be formed.
Therefore, in the stacked film that polarizability film is fitted with the state of the 1st and the 2nd diaphragm 200,300, width two
End is divided into the part that polarizability film is not present between the 1st diaphragm 200 and the 2nd diaphragm 300, is formed with bond layer
To the degree of a part for the part, width of the width than polarizability film (base material film 100) of the 1st and the 2nd bond layer 250,350
Degree is big.
According to applying method as above, the region in the absence of bond layer is not produced, in polarizability film with the 1st, the 2nd
The whole binding face of diaphragm 200,300 is formed uniformly bond layer, thus can stably manufacture polarizability film and the 1st,
The polarizability stacked film excellent in adhesion and polarizer layer 110 and the 1st of 2nd diaphragm 200,300, the 2nd diaphragm 200,
300 polarization plates excellent in adhesion.
Furthermore it is possible to prevent that bonding agent accompanies from the spilling of the width end of above-mentioned stacked film and with this when film from fitting
The compression bonding apparatus such as doubling roller pollution.The polarizability film of long size is continuously pasted using the 1st and the 2nd diaphragm 200,300
During conjunction, can also frontier defense stop the pollution for the compression bonding apparatus that the spilling of bonding agent is caused and the pollution on the stacked film surface associated with this
Side stably continuously manufactures polarizability stacked film and polarization plates.
For polarizability film and the 1st and the 2nd diaphragm 200,300, for example, it can be fitted by following methods：In polarization
Be supplied respectively between property film and the 1st diaphragm 200, between polarizability film and the 2nd diaphragm 300 bonding agent S, bonding agent T or
It is coated at least one that to be fitted film, then in a face of polarizability film via the 1st bonding agent being made up of bonding agent S
Layer 250 is laminated the 1st diaphragm 200, and is laminated the 2nd via by bonding agent T the 2nd bond layers 350 constituted in another face
Diaphragm 300, is thus made stacked film, by the stacked film between a pair of doubling rollers by wait pressed using compression bonding apparatus
Connect.
As the method for being coated with bonding agent to intermembranous supply or at least one that to be fitted film, it can enumerate in film
Between placement of adhesives charging nozzle head end, using pump etc. from the nozzle supply bonding agent method；Pass through the tape casting, line
Rod coating method, gravure coating process, comma rubbing method, scraping blade method, die slot rubbing method, Dipcoat method, spray-on process etc. are at least one
Method of bonding plane coating adhesive of individual film etc..The continuous supply and continuous painting of bonding agent can be carried out according to above-mentioned any means
Cloth.
In order to by the width adjustment of the 1st and the 2nd bond layer 250,350 to above-mentioned defined width, as long as adjustment bonding
Quantity delivered or coating weight, the application pressure (being the distance between doubling roller during using doubling roller) of compression bonding apparatus, the fortune of film of agent
Send speed etc..In addition, when continuously being fitted using the diaphragm 200,300 of polarizability film, the 1st and the 2nd of long size, can
With in intermembranous continuous supply bonding agent, on the other hand can continuously it be attracted using aspirator with side from being laminated via bond layer
Bonding process is implemented on the excessive bonding agent side that the width end of film is overflowed, but now, by the attraction for adjusting bonding agent
Amount can also adjust the width of the 1st and the 2nd bond layer 250,350.
Polarizability film is only when the one side of base material film has polarizer layer, and the 2nd diaphragm can not in bonding process S40
(do not supplied between the face of the side opposite with the side with polarizer layer of polarizability film and the 2nd diaphragm via the 2nd bond layer
Bonding agent T) and directly configure on polarizability film, but configured preferably via the 2nd bond layer.2nd diaphragm is viscous not via the 2nd
When connecing oxidant layer and directly configuring on polarizability film, for the 1st and the 2nd diaphragm 200,300, with the 1st bond layer 250
Width two ends are located at the more lateral at the width two ends of polarizability film and positioned at the 1st and the 2nd diaphragm 200,300 respectively
The mode of inside at width two ends be configured on polarizability film.
(the 1st, the 2nd diaphragm)
As the 1st, the 2nd diaphragm 200,300, as described above using their width W2、W3Than polarizability film (base material film
100) width W1Wide film (W2>W1、W3>W1).Width W2With W3It can be the same or different, but usually same widths.
In order in the width two end portions by above-mentioned stacked film between the 1st diaphragm 200 and the 2nd diaphragm 300
Set in the absence of the part of polarizability film enough to big, and effectively prevent the spilling of bonding agent, width W2、W3With width W1Difference
More than 40mm is preferably arranged to, more than 80mm is more preferably set to.It is long in the absence of the width of the part of above-mentioned polarizability film
The width two end portions spent for stacked film are each preferably arranged to more than 20mm, are more preferably set to more than 40mm.
On the other hand, if by width W2、W3Set wide, then the part that removing is cut off in aftermentioned removal step S50 becomes
Greatly, (effective utilizations of raw material) are unfavorable in terms of productivity ratio, therefore preferably by width W2、W3With width W1Difference be set to
Below 100cm, is more preferably set to below 60cm, is further preferably set to below 40cm.
1st, the 2nd diaphragm 200,300 can be for example comprising chain polyolefin-based resins (polypropylene-based resin respectively
Deng), the polyolefin-based resins such as cyclic polyolefin hydrocarbon system resin (norbornene resin etc.)；Cellulose triacetate, oxalic acid are fine
The cellulose esters system resins such as the plain ester of dimension；Polyethylene terephthalate, PEN, poly terephthalic acid fourth
The polyester based resins such as diol ester；Polycarbonate-based resin；(methyl) acrylic resin；Or their mixture, copolymer etc.
Film.The example of commercially available product of cyclic polyolefin hydrocarbon system resin and its film and cellulose triacetate can be used ibid.
1st diaphragm 200 and the 2nd diaphragm 300 can be made up of same material, can also be made up of foreign material.
1st and/or the 2nd diaphragm 200,300 can also have the protection of optical function concurrently for phase retardation film, brightness enhancement film etc.
Film.For example, by by the transparent resin film stretching (being stretched uniaxially or biaxially) comprising above-mentioned material or the shape on the film
Into liquid crystal layer etc., the phase retardation film for imparting arbitrary phase difference value can be made.
From the viewpoint of the slimming of polarizability stacked film and polarization plates, the thickness of the 1st and the 2nd diaphragm 200,300
Preferably less than 90 μm, more preferably less than 50 μm.On the other hand, from the viewpoint of intensity ensures, the 1st and the 2nd diaphragm
200th, 300 thickness is preferably more than 5 μm.
In order that the cementability of the bonding plane of bond layer and the 1st, the 2nd diaphragm 200,300 is improved, primary coat is preferably carried out
Processing, corona treatment, sided corona treatment, ultraviolet treatment with irradiation, flame treatment (flame treatment), saponification process
Deng surface treatment.Wherein, sided corona treatment, the saponification process relatively easily implemented are preferably capable.As saponification process, it can lift
Go out the method impregnated in aqueous alkali as sodium hydroxide, potassium hydroxide.
It is preferred that being improved according to the species for the resin for constituting the 1st, the 2nd diaphragm 200,300 in order to obtain sufficient cementability
Effect and suitably select surface treatment.When for example using cellulose esters resin film, saponification process is effective.In addition, using comprising
The chain such as polypropylene-based resin polyolefin-based resins, cyclic polyolefin hydrocarbon system resin, polyester based resin, polycarbonate-based resin or
During the film of (methyl) acrylic resin etc., sided corona treatment is effective.
Instead of implementing to be surface-treated to diaphragm or simultaneously, the bonding plane of polarizability film can be implemented at surface
Reason.
Hard conating can also be formed on the surface of side opposite with the polarizer layer of the 1st and/or the 2nd diaphragm 200,300, prevent
The optical layers such as dizzy layer, anti-reflection layer.The method for forming these optical layers on diaphragm surface is not particularly limited, and can use public affairs
The method known.Optical layer can be pre-formed on diaphragm before bonding process S40 is implemented, work of fitting can also implemented
After sequence S40, implement to form optical layer after aftermentioned removal step S50 or after implementing stripping process S60.
(bonding agent)
As the bonding agent S used in the fitting of the 1st diaphragm 200 and polarizability film, in order to the 2nd diaphragm 300 with
The laminating of polarizability film and the bonding agent T used as needed, can use water system bonding agent or Photocurable adhesive agent.
Bonding agent S and bonding agent T can be identical type, or variety classes, but go out from the viewpoint of production efficiency
Hair, preferably uses the bonding agent of identical type.
As water system bonding agent, the bonding agent comprising the polyvinyl alcohol resin aqueous solution, water system two-component-type ammonia can be enumerated
Carbamate system emulsion adhesive etc..Especially with being surface-treated the fibre after (hydrophilicity-imparting treatment) using saponification process etc.
When the plain ester resin film of dimension is as diaphragm, the water system bonding agent comprising the polyvinyl alcohol resin aqueous solution is preferably used.
As polyvinyl alcohol resin, except the saponifying polyvinyl acetate processing of the homopolymer of vinyl acetate will be used as
Obtained by beyond alcotex, can also use by vinyl acetate with can be with the other monomers of its copolymerization copolymer soap
Polyvinyl alcohol based copolymer or the modified polyvinylalcohol based polymer by the modification of its hydroxylic moiety etc. obtained by change processing.
Water system bonding agent can contain polyaldehyde, soluble epoxide compound, melamine based compound, zirconium oxide chemical combination
The additives such as thing, zinc compound.During using water system bonding agent, the thickness of bond layer therefrom is usually less than 1 μm.
During using water system bonding agent, laminating is stated on the implementation (via the stacking of the film of bond layer and by compression bonding apparatus
Pressure apply) after, the drying process for being preferable to carry out making film to dry to remove the water contained in water system bonding agent.It can lead to
Cross and import drying oven to implement drying by film.
Drying temperature (temperature of drying oven) is preferably 30~90 DEG C.If less than 30 DEG C, there is polarizability film and diaphragm
Become easily peelable tendency.If drying temperature is more than 90 DEG C in addition, it is likely that shaken performance degradation by thermal conductivity deflection.It will can do
Dry set of time is 10~1000 seconds, from the viewpoint of productivity ratio, preferably 60~750 seconds, more preferably 150~600 seconds.
After drying process, room temperature can be arranged on or the temperature maintenance of the temperature such as 20~45 DEG C or so high somewhat than its
The maintenance process of 12~600 hours or so.Curing temperature is typically set must be lower than drying temperature.
When implementing aftermentioned removal step S50, above-mentioned drying process and maintainer can be carried out before removal step S50
Sequence, can also carry out above-mentioned drying process and maintenance process after removal step S50.But, using by bonding process S40
Obtained by polarizability stacking film production polarization plates when when stripping process S60 (implement), be dried before stripping process S60
Process and maintenance process.
Above-mentioned Photocurable adhesive agent refers to the bonding agent solidified by irradiation ultraviolet radiation isoreactivity energy-ray, can lift
Go out the bonding agent for example containing polymerizable compound and Photoepolymerizationinitiater initiater, the bonding agent containing light reactive resin, containing viscous
Tie bonding agent of agent resin and photoreactivity crosslinking agent etc..As polymerizable compound, can enumerate photo-curable epoxy monomer,
The photopolymerization monomers such as light-curable acrylic system monomer, photo-curable carbamate system monomer, from photopolymerization monomer
Oligomer etc..As Photoepolymerizationinitiater initiater, it can enumerate comprising in being produced by the irradiation of ultraviolet isoreactivity energy-ray
The initiator of the material in the activated centre of free love base, radical anion, radical cation etc.As containing polymerism
It is preferable to use contain photo-curable epoxy monomer and light sun for the Photocurable adhesive agent of compound and Photoepolymerizationinitiater initiater
The bonding agent of cation polymerization initiator.
As described above, when being provided with uncoated area in resin bed formation process S10, sometimes in stretching process S20 etc.
In the uncoated area occur wave.If being implemented in the state of it there occurs such wave using Photocurable adhesive agent
Bonding process S40, it is likely that a part of Photocurable adhesive agent is stranded in wave portion, so that because active energy beam shines
When penetrating heat and xanthochromia deteriorate.Therefore it is also preferred that removing uncoated area from the viewpoint of xanthochromia deterioration is avoided.
During using Photocurable adhesive agent, laminating is stated on the implementation (via the stacking of the film of bond layer and by crimping
The pressure of device applies) after, by the way that process when solvent (Photocurable adhesive agent contain etc.), Ran Houzhao are dried as needed
Penetrate active energy beam and enter to exercise the curing process that Photocurable adhesive agent solidifies.The light source of active energy beam is not special
Limit, but preferably there is the active energy beam of luminous distribution in below wavelength 400nm, specifically, preferably use low pressure water
Silver-colored lamp, middle medium pressure mercury lamp, high-pressure mercury-vapor lamp, extra-high-pressure mercury vapour lamp, chemical lamp, black light lamp, low-light excite mercury vapor lamp, metal halide
Thing lamp etc..
Suitably determined according to the composition of Photocurable adhesive agent to the photo-irradiation intensity of Photocurable adhesive agent, preferably with
The exposure intensity of the effective wavelength region of activation to polymerization initiator is 0.1~6000mW/cm2Mode set.Irradiation is strong
Spend for 0.1mW/cm2During the above, the reaction time will not become long, be 6000mW/cm2When following, occurs the heat from radiation of light source
And Photocurable adhesive agent solidification when heat release caused by Photocurable adhesive agent xanthochromia, polarizer layer deterioration possibility
Property is small.
Suitably determined also according to the composition of Photocurable adhesive agent to the light irradiation time of Photocurable adhesive agent, preferably
Using with the accumulated light of above-mentioned exposure intensity and the product representation of irradiation time as 10~10000mJ/cm2Mode set.Accumulation
Light quantity is 10mJ/cm2During the above, can produce sufficient amount makes curing reaction more may be used from the activated centre of polymerization initiator
Carried out by ground, be 10000mJ/cm2When following, irradiation time will not become long, can maintain good productivity ratio.
It should be noted that the thickness of the bond layer after active energy beam irradiation is usually 0.001~5 μm or so,
Preferably 0.01~2 μm, more preferably 0.01~1 μm.
Above-mentioned drying process and solidification work can be carried out when implementing aftermentioned removal step S50, before removal step S50
Sequence, can also carry out above-mentioned drying process and curing process after removal step S50.But, using by bonding process S40
Obtained by polarizability stacking film production polarization plates when when stripping process S60 (implement), be dried before stripping process S60
Process and curing process.
(5) removal step S50
This process is by by polarizability obtained by bonding process S40 (or drying process, maintenance process or curing process)
The process that the width two end portions of stacked film are removed by cut-out.This process can also will pass through bonding process by side
The polarizability stacked film of long size obtained by S40 transports side and continuously carries out removing processing, or by the way that bonding process S40 will be passed through
Obtained by the polarizability stacked film of long size first batch as roll, while from the roll body by polarizability stacked film continuously debatching while connect
Removing processing is carried out continuously continuously to implement.
This work can be omitted when that will be used by polarizability stacked film obtained by bonding process S40 directly as polarization key element
Sequence, but from by this work (when implementing stripping process S60) during polarizability stacking film production polarization plates obtained by bonding process S40
Sequence is necessary process.
The one of the off-position of film is for example shown in Fig. 3, is the position at the width two ends of polarizer layer 110 or than in it
The position of side, i.e. it is that can at least remove the 1st diaphragm 200 directly (to be not present via bond layer with the 2nd diaphragm 300
Polarizability film) bonding part and in polarizability film there is uncoated area 120,130 (not form the area of polarizer layer 110
Domain) when diaphragm and base material film via the Nian Jie part of bond layer directly (be not present polarizer layer 110) position.
By removing striping width two end portions in such off-position, becoming in stripping process S60 can be easily
Ground is from the peeling base film 100 of polarizer layer 110.
Can be by being die cut method or having used the slot method (ス リ ッ ト methods) of slot device to carry out film width two end portions
Removing.Wherein, preferably the polarizability stacked film of long size continuously can be implemented to remove the slot method handled.
As slot method, the side for using the razor blade for being for example referred to as Razor blade as slot device can be enumerated
Method.Include not setting backup guide roll and the aerial cut-out of slot in the air especially using the slot method of razor blade；As backup guide roll,
Blade is put into the roller for cut out ditch and makes ditch roller method of the sinuous stabilization of slot etc..
If enumerating the example beyond slot method, there is the circular blade for being referred to as shear-blade using two panels, side coordinates film
Transport rotation side cutter and bottom knife pressurize and the method for slot；The blade of broken line blade (ス U ア swords) will be referred to as
Quenching and to the method for the extruding such as roller and slot；While shear-blade two panels is combined and as scissors cutting edge slot method
Deng.
Wherein, preferably use cut-out (slot) position that can simply change film and advance easily stable method i.e.
" using the ditch roller method of razor blade " etc..
The device used in removal step S50 is not so big device, therefore can be installed into above-mentioned S10~S40
In any process production line in.If for example, in the reeling end that will be batched by polarizability stacked film obtained by bonding process S40
Configure slot device, then can be to carry out slot when batching polarizability stacked film.
In addition, can certainly uneasiness be fitted into above-mentioned S10~S40 in the production line of any process, and with these processes
It is independently positioned at the device used in removal step S50.As such example, it can enumerate and carry out recoil (the volume I of roller
For え) etc. the dress for being referred to as rewinder etc. center slot device etc..
The polarizability stacked film that film width two end portions can be removed is used directly as polarization key element, and
And also serve as making (for the aftermentioned stripping process S60) intermediates of the polarization plates comprising polarizer layer and diaphragm and useful.
<The manufacture method of polarization plates>
The manufacture method of the polarization plates of the present invention includes preparing the process of above-mentioned polarizability film, bonding process S40, removes work
Sequence S50 and stripping process S60 (reference picture 1).On the process beyond stripping process S60, due to same as described above thus save
Explanation.The method according to the invention, identical with the situation of polarizability stacked film, can stably manufacture prevents overflowing for bonding agent
Go out, the pollution with the compression bonding apparatus such as this associated doubling roller and the cementability of the pollution on film surface and polarizer layer and diaphragm
Excellent polarization plates.
(6) stripping process S60
Reference picture 4, this process is：From by width two end portions obtained by removal step S50 be removed it is inclined
Shaking property stacked film, which is peeled off, removes base material film 100, so as at least obtain being fitted with the 1st of the 1st diaphragm 200 in polarizer layer 110
The process of polarization plates.
Example as shown in Fig. 4, polarizer layer 110 is formed with the two sides of base material film 100, in bonding process
When the 2nd diaphragm 300 is fitted on polarizability film via the 2nd bond layer 350 in S40,2 can be obtained partially by this process
Vibration plate, i.e. above-mentioned 1st polarization plates and be fitted with the 2nd polarization plates of the 2nd diaphragm 300 in polarizer layer 110.Only in base material film
When 100 face (the only side of the 1st diaphragm 200) is formed with polarizer layer 110,1 polarization plates the (the 1st is obtained by this process
Polarization plates).
This process can also be by continuous when being conveyed through the polarizability stacked film of long size obtained by removal step S50
Ground carries out lift-off processing, or by the way that the polarizability stacked film by long size obtained by removal step S50 is first batched as roll,
While from the roll body by polarizability stacked film continuously debatching while continuously carry out lift-off processing and continuously implement.
The method for peeling off removing base material film is not particularly limited, can be by with entering to the common polarization plates with adhesive
The method that the stripping process of capable separator (stripping film) is same is peeled off.
Fig. 5 is the figure of one of the stripping means for representing the base material film in stripping process S60, is to show schematically base material film
Peeling direction and polarizer layer differently- oriented directivity relation top view.In Figure 5, from the stripping group of polarizability stacked film 500
Material film 600, forms the 1st polarization plates 700 comprising the 1st diaphragm and polarizer layer.The upper strata of base material film 600 is omitted in Figure 5
The 2nd folded diaphragm.
The differently- oriented directivity of polarizer layer is indicated by the arrow A, the peeling direction of base material film 600, base material film is indicated by the arrow B
600 peeling direction (arrow B) and differently- oriented directivity (arrow A) angulation of polarizer layer are represented with θ.Now, preferably with：
Differently- oriented directivity (arrow A) the angulation θ of the peeling direction (arrow B) of base material film 600 and polarizer layer is less than 20 degree, excellent
Elect less than 10 degree as, the more preferably mode of less than 5 degree (such as 0 degree) peeled off.By using angle, θ as less than 20 degree
Mode peeled off, cohesion destruction will not be produced in polarizer layer, can gallantly and successfully peeling base film 600.Partially
Shake lamella differently- oriented directivity be the polyvinyl alcohol resin for constituting polarizer layer the direction that is arranged by stretching of main chain, be
Refractive index highest direction in the face of polarizer layer.
In addition as shown in Figure 6, in the pick-up point C of the polarization plates 700 of base material film 600 and the 1st, before preferably being peeled off with base material film
Polarizability stacked film 500 and the angulation of the 1st polarization plates 700Polarizability stacked film 500 before being peeled off less than base material film
With the angulation of base material film 600Mode peeling base film 600.Preferably less than 45 degree, more preferably 0 degree.It is logical
Cross withFurther withThe mode peeling base film 600 of degree, can suppress the cohesion occurred in polarizer layer
Destruction and successfully peeling base film 600.
In figure 6, illustrate in pick-up point C to polarizability stacked film 500 with base material film 600 with the 1st polarization plates 700 in phase
The appearance that the mode of opposite direction formation angle is peeled off, but it is also possible in pick-up point C to polarizability stacked film 500 with base material film
600 mode with the 1st polarization plates 700 in same direction formation angle is peeled off, now, on angleAndIt is above-mentioned
Condition is also effective.
More than, reference picture 5 and Fig. 6 are carried out to the method that the 1st polarization plates are obtained from polarizability stacked film peeling base film
Narration, but from polarizability stacked film peeling base film obtain 2 polarization plates when similarly.The is taken out from polarizability stacked film
The order of the process of the 2nd polarization plates of process and taking-up of 1 polarization plates is without especially system limit.
Polarization plates manufactured as above can be used in practicality as the optical film for being laminated with other optical layers.In addition, on
The function of these optical layers can also be had by stating diaphragm.As other optical layers, it can enumerate and transmit certain polarised light, will show
Go out the reflective polarizing film of the polarised light reflection of opposite to that property；There is the anti-dazzle function of band of concaveconvex shape on surface
Film；The film of belt surface anti-reflective function；There is the reflectance coating of reflection function on surface；Have the half of reflection function and transmission function concurrently
Transflective film；Compensation film for angular field of view etc..
It is used as the reflective polarizing film reflected with transmiting certain polarised light, by the polarised light for showing opposite to that property
Suitable commercially available product, can enumerate such as " DBEF " (3M company systems can start with from Sumitomo 3M (strain)), " APF " (3M company systems, energy
Start with from Sumitomo 3M (strain)).
As compensation film for angular field of view, can enumerate substrate surface coating fluid crystalline compound and be orientated optical compensation films,
Phase retardation film comprising polycarbonate-based resin, the phase retardation film for including cyclic polyolefin hydrocarbon system resin.
As equivalent to the commercially available product in substrate surface coating fluid crystalline compound and the optical compensation films being orientated, it can lift
Go out " WV FILM " (Fuji Photo Film (Ltd.)), " NH FILM " (Nippon Oil(Nippon Mitsubishi Oil) (strain) system), " NR FILM " (Nippon Oil(Nippon Mitsubishi Oil)s
(strain) makes) etc..
As the commercially available product suitable with the phase retardation film comprising cyclic polyolefin hydrocarbon system resin, " Arton film " can be enumerated
(JSR (strain) systems), " ESCENA " (ponding chemical industry (strain) system), " ZEONOR FILM " (Japanese auspicious father-in-law's (strain) system) etc..
Embodiment
Hereinafter, show that embodiment is further specifically explained to the present invention, but the present invention is not limited to these examples.
<Embodiment 1>
(1) making of base material film
Made by using the shape that is coextruded into of multilayer extrusion forming machine by the ethylene unit containing about 5 weight %
Random copolymer (Sumitomo Chemical (strain) system " SUMIMOTO NOBLENE W151 ", Tm=138 DEG C of fusing point) structure of propylene/ethylene
Into resin bed both sides be configured with by propylene homopolymer i.e. homo-polypropylene (Sumitomo Chemical (strain) make " SUMIMOTO NOBLEN
EFLX80E4 ", Tm=163 DEG C of fusing point) constitute resin bed 3-tier architecture the base material deflector roll (winding of the base material film of long size
Product).The aggregate thickness of base material film is 100 μm, and the thickness ratio (FLX80E4/W151/FLX80E4) of each layer is 3/4/3.
(2) formation of priming coat and polyvinyl alcohol resin layer
By pva powder (Japanese synthetic chemical industry (strain) system " Z-200 ", average degree of polymerization 1100, average saponification
99.5 moles of % of degree) 95 DEG C of hot water is dissolved in, prepare the weight % of concentration 3 polyvinyl alcohol water solution.It is water-soluble what is obtained
In liquid 5 parts by weight of crosslinking agent (Sumitomo Chemical (strain) system " Sumirez Resin are mixed relative to the parts by weight of pva powder 6
650 ") coating liquid for undercoat layer is obtained.
In addition, by pva powder, (Kuraray (strain) makes " PVA124 ", average degree of polymerization 2400, mean saponification degree
98.0~99.0 moles of %) 95 DEG C of hot water is dissolved in, prepare the weight % of concentration 8 polyvinyl alcohol water solution.
Then, its two sides is implemented at corona when the base material deflector roll obtained from above-mentioned (1) is by base material film continuously debatching
Reason, then the two sides after sided corona treatment is continuously coated with above-mentioned coating liquid for undercoat layer using gravure coater, makes at 80 DEG C
It is dried 10 minutes, has thus made the film of the priming coat on two sides with 0.2 μm of thickness.
And then, film is transported on side, while being continuously coated with above-mentioned polyethylene on the priming coat on two sides using comma coater
Alcohol solution, makes it dry at 80 DEG C 5 minutes, the polyethenol series of 10.6 μm of thickness is thus formd on the priming coat on two sides
Resin bed.Now, by from the width inward at both ends side of base material film respectively 1cm to be partially fabricated uncoated polyvinyl alcohol water-soluble
The uncoated area of liquid.The film is first batched as roll.
(3) making of stretched film
While from the deflector roll obtained by above-mentioned (2) by film continuously debatching, while will be poly- by using the slot method of razor blade
The uncoated area of vinyl alcohol resin layer continuously cuts off removing, then using aerial drawing of the stretching device at 160 DEG C between roller
Stretch the drawing that 65.5 μm of thickness is made to longitudinal direction (film carriage direction) with 5.8 times of multiplying power progress free end uniaxial tension for temperature
Film is stretched, is batched and obtains stretching deflector roll.
(4) making of polarizability film
While the stretching deflector roll obtained from above-mentioned (3) is by stretched film continuously debatching, while stretched film is being contained into iodine and iodate
The residence time of 150 seconds or so is impregnated in 30 DEG C of staining solution of potassium to carry out the dyeing processing of polyvinyl alcohol resin layer,
Then, with 10 DEG C of the remaining staining solution of pure water rinsing.Then, in crosslinker solution of 76 DEG C containing boric acid and KI
The residence time of dipping 600 seconds or so carries out crosslinking Treatment.Afterwards, cleaned 4 seconds with 10 DEG C of pure water, 300 are dried at 80 DEG C
Second, the polarizability film with polarizer layer is thus made, is batched and obtains polarizability deflector roll.
(5) making of polarizability stacked film
Pva powder ((strain) Kuraray system " KL-318 ", average degree of polymerization 1800) is dissolved in 95 DEG C of hot water,
It is prepared for the weight % of concentration 3 polyvinyl alcohol water solution.It is mixed relative to the parts by weight of pva powder 2 in the obtained aqueous solution
1 parts by weight of crosslinking agent (Sumitomo Chemical (strain) system " Sumirez Resin 650 ") is closed, adhesive solution is made.
Then, the polarizability deflector roll obtained from above-mentioned (4) is by the continuously debatching of polarizability film, and from the 1st protection deflector roll
By the 1st diaphragm (transparent protective film (Konica Minolta (strain) makes " KC4UY ") being made up of triacetyl cellulose (TAC)) even
The debatching of continuous ground, deflector roll is protected by the 2nd diaphragm (same with the 1st diaphragm) continuously debatching from the 2nd.Then, to the 1st and the 2nd
The binding face of diaphragm is implemented after saponification process, while it is molten that (charging) above-mentioned bonding agent is supplied between two diaphragms and polarizer layer
The 1st diaphragm is folded, in folded 2nd diaphragm of another surface layer in liquid side in a surface layer of polarizability film, and layered product is pasted from a pair
Pass through between conjunction roller, thus crimped, carried out the continuous laminating of the 1st and the 2nd diaphragm.
As the 1st and the 2nd diaphragm, width 8.0cm wider than polarizability film film is used, with the 1st and the 2nd diaphragm
The width center mode consistent with the width center of polarizability film is fitted, and (therefore the 1st and the 2nd diaphragm exists
Width two end portions protrude 4.0cm laterally respectively from polarizability film).
In addition, in laminating, being located at the width two of polarizability film respectively with the width two ends of two bond layers
The more lateral at end and positioned at the 1st and the 2nd diaphragm width two ends inside mode, have adjusted the bonding agent of both sides
The quantity delivered of solution.
Followed by, make at 80 DEG C its dry 5 minutes and polarizability stacked film is made, batched and obtain polarizability layer
Folded deflector roll.The polarizability stacked film is by 1 diaphragm/bond layer/polarizer layer/priming coat/base material film/priming coat/polarization
Lamella/bond layer/this 9 layers of the 2nd diaphragm is constituted.
In obtained polarizability stacked film, do not observe bonding agent from the spilling and bonding agent of film end to the 1st, the 2nd
The attachment of the outer surface of diaphragm, in good state.In addition, dirty caused by also not observing bonding agent for doubling roller
Dye.
(6) making of polarization plates
While the polarizability obtained from above-mentioned (5) is laminated deflector roll by the continuously debatching of polarizability stacked film, while by the 1st diaphragm
Continuously cut-out is carried out with the 2nd diaphragm by using the slot method of razor blade via bond layer directly be bonded part to remove
Go.
Followed by base material film is continuously peeled off in base material film/primary coat bed boundary, removed, obtain two panels in base material film
The polarization plates of the composition of " (the 1st or the 2nd) diaphragm/bond layer/polarizer layer/priming coat " of both sides stacking.Peeling base
During film, in any base material film/primary coat bed boundary, by the above-mentioned angle, θ of base material film and the pick-up point of polarization plates,Respectively
It is set to 0 degree, 0 degree, 45 degree or so.Can relatively easily peeling base film.
<Comparative example 1>
Polarizability deflector roll has been made by the method described in (1)~(4) of embodiment 1.
From the polarizability deflector roll by the continuously debatching of polarizability film, and protect deflector roll by the 1st diaphragm (by three from the 1st
The transparent protective film (Konica Minolta (strain) makes " KC4UY ") that acetylcellulose (TAC) is constituted) continuously debatching, protected from the 2nd
Cuticula roller is by the 2nd diaphragm (in the same manner as the 1st diaphragm) continuously debatching.Then, to the binding face of the 1st and the 2nd diaphragm
Implement after saponification process, while supply (charging) and the bonding agent used in embodiment 1 are molten between two diaphragms and polarizer layer
The 1st diaphragm is folded, in folded 2nd diaphragm of another surface layer in liquid identical adhesive solution side in a surface layer of polarizability film,
Layered product is passed through between a pair of doubling rollers, thus crimped, the continuous laminating of the 1st and the 2nd diaphragm has been carried out.
As the 1st and the 2nd diaphragm, using the film with polarizability film same widths, with the width of the 1st and the 2nd diaphragm
The direction center mode consistent with the width center of polarizability film is fitted (therefore the end face and polarization of the 1st and the 2nd diaphragm
The end face of property film is consistent).
In addition laminating when, by as bonding agent throughout the amount of the whole binding face of polarizability film in the way of have adjusted both sides
Adhesive solution quantity delivered.But, although have adjusted the quantity delivered of such adhesive solution, film during due to transporting
The sinuous, fluctuation of the quantity delivered of adhesive solution, bonding agent bit by bit overflows from film width end and is attached to laminating
Roller.By film fit tens of m when be attached to the bonding agent of doubling roller and start to be transferred to the outer surface of the 1st and the 2nd diaphragm, the table
The pollution in face starts significantly.
Followed by, it is dried at 80 DEG C 5 minutes, obtain the polarizability layer with layer composition same as Example 1
Folded film.
The bond layer of polarizability stacked film to obtaining confirms, as a result, although the bonding agent that have adjusted as above is molten
The quantity delivered of liquid, but in addition to the part overflowed from film width end, also see that the end of bond layer is present in film
The part (part that bond layer is not present i.e. between polarizer layer and diaphragm) of the inside of width end.Due to
The associated difference for drying contraction, sends out in the width end of polarizability stacked film with the inhomogeneities of such bond layer
Raw wave.
Then, above-mentioned polarizability stacked film is batched as after roll, by polarizability stacked film debatching, as a result, due to transfer
To the bonding agent of the outer surface of diaphragm, the region film in film end is fitted each other, the bonding agent cohesion destruction in debatching
And leave the cohesion depredation of white.In addition, tension force during debatching is also unstable.
Then, peeling base film is attempted from the polarizability stacked film after debatching, as a result, although stripping is possible in itself,
But peeling direction moment change when being peeled off due to the wave of film end, tension force is unstable thus can not successfully peel off.
Symbol description
100th, 600 base material film, 110 polarizer layers, 120,130 uncoated areas, 200 the 1st diaphragms, 250 the 1st bonding agents
Layer, 300 the 2nd diaphragms, 350 the 2nd bond layers, 500 polarizability stacked films, 700 the 1st polarization plates.
Claims (3)
1. a kind of manufacture method of polarization plates, it includes：
Prepare the process of polarizability film, the polarizability film possesses width and the base material film at least one face of base material film
Width is identical or polarizer layer of narrow width than the base material film, and the polarizer layer has dichroism pigment by gas absorption quantity
Polyvinyl alcohol resin layer is constituted, and
The process for obtaining polarizability stacked film, wherein, i.e. in the one of base material film on a face of the polarizability film
Width 1st diaphragm wider than the polarizability film is configured via the 1st bond layer on the polarizer layer that face is set, described inclined
Width 2nd diaphragm wider than the polarizability film is configured on another face of shaking property film,
The the 1st and the 2nd diaphragm is configured in the following manner：The width two ends of 1st and the 2nd diaphragm are located at respectively
The more lateral at the width two ends of the polarizability film, while the width two ends of the 1st bond layer are located at respectively
The more lateral at the width two ends of the polarizability film and positioned at the 1st and the 2nd diaphragm width two ends more
Inner side,
This method also includes：
After the process of the 1st and the 2nd diaphragm is configured, position or ratio at the width two ends of the polarizer layer
The position cut-out of the position inside at the width two ends of the polarizer layer, thus by the width of the polarizability stacked film
The process that direction two end portions are removed, and
The polarizability stacked film manufactured by the removal step, which is peeled off, removes the base material film, obtains in the polarizer layer
It is fitted with the process of the 1st polarization plates of the 1st diaphragm.
2. the manufacture method of polarization plates according to claim 1, wherein,
Preparing the process of the polarizability film includes：
Polyvinyl alcohol is formed containing the coating fluid of polyvinyl alcohol resin by the coating at least one face of the base material film
The process of resin,
By with polyvinyl alcohol resin layer base material film uniaxial tension process and
The process that the polyvinyl alcohol resin layer of the film after uniaxial tension is dyed and polarizer layer is made with dichroism pigment.
3. the manufacture method of polarization plates according to claim 1, wherein,
The polarizability film possesses the polarizer layer on the two sides of the base material film,
In the process for configuring the 1st and the 2nd diaphragm, the 2nd diaphragm is configured in the following manner：In the polarizability
Configured on another face of film via the 2nd bond layer, the width two ends of the 2nd bond layer are respectively positioned at described inclined
The more lateral at the width two ends of shaking property film and positioned at the 1st and the 2nd diaphragm width two ends inside,
Peeled off from the polarizability stacked film and remove the base material film, obtain the 1st polarization plates and in polarizer layer patch
Close the 2nd polarization plates for having the 2nd diaphragm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/052234 WO2013114583A1 (en) | 2012-02-01 | 2012-02-01 | Production method for polarizing laminated film and production method for polarizing plate |
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| CN104081232A CN104081232A (en) | 2014-10-01 |
| CN104081232B true CN104081232B (en) | 2017-09-01 |
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| JP (1) | JP6120779B2 (en) |
| KR (1) | KR101814865B1 (en) |
| CN (1) | CN104081232B (en) |
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| KR101614211B1 (en) | 2013-09-30 | 2016-04-20 | 주식회사 엘지화학 | Method for Maunfacturing a Single-faced Thin Polarizing Plate |
| JP6543447B2 (en) * | 2014-09-18 | 2019-07-10 | 住友化学株式会社 | Method for producing polarizing laminate film and stretched film with protect film |
| JP6422507B2 (en) * | 2014-12-12 | 2018-11-14 | 住友化学株式会社 | Manufacturing method of polarizing film and polarizing film |
| JP6472712B2 (en) * | 2015-05-29 | 2019-02-20 | 住友化学株式会社 | LAMINATED FILM MANUFACTURING METHOD AND LAMINATED FILM |
| JP6749321B2 (en) * | 2015-06-05 | 2020-09-02 | 住友化学株式会社 | Defect inspection method for light-transmitting film, manufacturing method for linear polarizer film, and manufacturing method for polarizing plate |
| JP6679268B2 (en) * | 2015-10-22 | 2020-04-15 | 住友化学株式会社 | Method for manufacturing laminated optical film |
| EP3165951A1 (en) * | 2015-11-04 | 2017-05-10 | Nitto Denko Corporation | Polarizing plate with pressure-sensitive adhesive layer |
| 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. |
| JP6175527B1 (en) * | 2016-02-25 | 2017-08-02 | 住友化学株式会社 | Method for producing laminated optical film |
| JP6076523B1 (en) * | 2016-02-25 | 2017-02-08 | 住友化学株式会社 | Method for producing laminated optical film |
| JP6148775B1 (en) * | 2016-02-25 | 2017-06-14 | 住友化学株式会社 | Method for producing laminated optical film |
| JP2016212430A (en) * | 2016-07-13 | 2016-12-15 | 日東電工株式会社 | Method for manufacturing polarizing plate |
| JP2017151421A (en) * | 2017-02-10 | 2017-08-31 | 住友化学株式会社 | Method for manufacturing layered optical film |
| JP7085414B2 (en) * | 2018-06-14 | 2022-06-16 | 住友化学株式会社 | Liquid crystal film manufacturing method and optical laminate manufacturing method |
| KR102585712B1 (en) * | 2019-01-11 | 2023-10-10 | 삼성디스플레이 주식회사 | Protective film, manufacturing method thereof, and manufacturing method of display device using the same |
| JP7257907B2 (en) * | 2019-07-22 | 2023-04-14 | 日東電工株式会社 | Manufacturing method of thin circularly polarizing plate |
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| 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 |
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| JPH1192725A (en) * | 1997-09-19 | 1999-04-06 | Nippon Synthetic Chem Ind Co Ltd:The | Adhesive tape for splicing sheet or film |
| JP3942150B2 (en) * | 2001-09-26 | 2007-07-11 | 日本合成化学工業株式会社 | Emulsion-type adhesive composition |
| JP4928529B2 (en) * | 2008-11-12 | 2012-05-09 | 日東電工株式会社 | Manufacturing method of polarizing plate, polarizing plate, optical film, and image display device |
| JP4868266B2 (en) * | 2010-03-31 | 2012-02-01 | 住友化学株式会社 | Method for producing laminated film and method for producing polarizing plate |
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| WO2013114583A1 (en) | 2013-08-08 |
| KR20140120315A (en) | 2014-10-13 |
| TWI565976B (en) | 2017-01-11 |
| JP6120779B2 (en) | 2017-04-26 |
| CN104081232A (en) | 2014-10-01 |
| WO2013114583A9 (en) | 2013-12-27 |
| KR101814865B1 (en) | 2018-01-04 |
| TW201341862A (en) | 2013-10-16 |
| JPWO2013114583A1 (en) | 2015-05-11 |
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