CN100410696C - Manufacturing method of polaroid, polarizer and optical laminate thereof - Google Patents
Manufacturing method of polaroid, polarizer and optical laminate thereof Download PDFInfo
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- CN100410696C CN100410696C CNB2005100016636A CN200510001663A CN100410696C CN 100410696 C CN100410696 C CN 100410696C CN B2005100016636 A CNB2005100016636 A CN B2005100016636A CN 200510001663 A CN200510001663 A CN 200510001663A CN 100410696 C CN100410696 C CN 100410696C
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
Abstract
Provided is a manufacturing method of polarizing film which hardly causes scratches and wrinkles. In the manufacturing method of polarizing film, a polyvinyl alcohol film is treated in order of swelling, dyeing, borating and water washing and uniaxial stretching is performed on the borating process and/or the prior process. Therein, a sponge rubber roller is used as at least one guide roller in treatment liquid. Further, the hardness of sponge in the sponge rubber roller is 20 to 60 degrees by JIS Shore C scale, the density of sponge is 0.4 to 0.6 g/cm<SP>3</SP>and the surface roughness is 10 to 30 S.
Description
Technical field
The invention relates to less wound or wrinkle; the manufacture method of the polaroid of no folding line (polarizing film); at least the single face lamination of gained polaroid has the polarizer (polarizer) of diaphragm; further phase retardation film; brightness promotes film (luminance improving film); the arbitrary independent or majority that improve in film (view angleimproving film) and the semipermeable reflection film (semi-transmission reflecting film) at the visual angle is fitted and the optical laminate (laminate) of formation.
Technical background
So far, use the surface adsorption orientation polyvinyl alcohol (PVA) mesentery of dichromatism pigment to be arranged as polaroid always.That is, known iodine be polaroid or dichroic dye as the dyestuff of dichromatism pigment as the iodine of dichromatism pigment is polaroid etc.These polaroids, usually at least single face, be preferably the solid of forming with the aqueous solution of polyvinyl alcohol resin on the two sides and be diaphragm such as intermediary's applying Triafol T, form polarizer.
The manufacture method of known polarization sheet is as follows: use nip rolls, guide roller (guide roll), after making the polyvinyl alcohol (PVA) mesentery be infiltrated on water, making its swelling, with above-mentioned dichromatism pigment dyeing, after the extension, deciding to handle the polyvinyl alcohol (PVA) mesentery for making iodine in film, boric acid, washing back dry (for example, with reference to patent documentation 1).At this moment, set processing and bathe the speed discrepancy of front and back nip rolls, carry out the extension of film, change carriage direction, carry out importing and the taking-up of film to treating fluid by guide roller.
Level and smooth rubber rollers or spiral rubber rollers that the surface is formed with rubber layer are used as guide roller (for example, referring to Patent Document 2).
In recent years, follow the high-gradeization of the liquid crystal indicator that uses polaroid, wish to obtain than the polaroid of previous method gained still less hinder and wrinkle, the polaroid of no folding line.
[patent documentation 1] Japanese kokai publication hei 10-153709 communique
[patent documentation 2] TOHKEMY 2000-147252 communique
Summary of the invention
The major subjects that desire of the present invention solves provides the method for the polaroid of making less wound or wrinkle, no folding line.
Present inventors are the wholwe-hearted result who studies of the polaroid that can make less wound or wrinkle, no folding line, find by using foamed rubber system roller (being called the foamed rubber roller), compare with previous rubber system roller, scar is suppressed, is difficult to form wrinkle, particularly in the treating fluid guide roller when widening roller, that uses foamed rubber system widens roller (be called sponge and widen roller), can suppress the generation of wrinkle or folding line (state that a film part is overlapping), thereby finish the present invention.
Promptly, the manufacture method of polaroid of the present invention is that the polyvinyl alcohol (PVA) mesentery is in turn through swelling processing, dyeing processing, boric acid processing and washing processing, boric acid is handled the polaroid manufacture method of carrying out uniaxial extension in manufacture craft and/or its preceding manufacture craft, it is characterized in that at least one guide roller uses the foamed rubber roller in the treating fluid that above-mentioned swelling is handled, dyeing is handled, boric acid is handled and washing is handled.
The sponge hardness of foamed rubber roller is that JIS Xiao Shi C scale 25～50 degree, density are 0.42～0.57g/cm
3And surfaceness is that 15～25S is good.
Moreover the guide roller in the treating fluid is for widening roller (widening roll), uses to widen foamed rubber to widen roller be good.
Further, polarizer of the present invention gets for the diaphragm of single-sided lamination at least of the polaroid that obtains as previously mentioned.This diaphragm possesses phase retardation film, brightness and promotes any function that film, visual angle improve film and semipermeable reflection film and all can.Or, also can be at least single-sided lamination have be fitted with from phase retardation film on the above-mentioned polarizer of diaphragm, improve the brightness film, at least a kind the optical laminate of selecting in film and the semipermeable reflection film is improved at the visual angle.
Compare with previous rubber system guide roller, can obtain the less polaroid that injures wrinkle.Particularly guide roller uses when widening roller foamed rubber to widen roller in the treating fluid, can suppress to wrinkle and the generation of folding line.
Polarizer of the present invention, optical laminate are used in the liquid crystal indicator, can obtain high-grade liquid crystal display.
Embodiment
Below, describe the present invention in detail.
Form the polyvinyl alcohol resin of polyvinyl alcohol (PVA) (polyvinyl alcohol) mesentery among the present invention, being exemplified as polyvinyl acetate usually is that resin is through the saponification gains.More than about 85 Mores of saponification degree (mole), about 90mole% is above to be good, is preferably about 99mole%～100mole%.Polyvinyl acetate be resin except that polyvinyl acetate as the independent polymkeric substance of vinyl acetate, can enumerate vinyl acetate with can with the multipolymer of other monomer of its copolymerization, for example ethene-vinyl acetate copolymer etc.Other monomer of possible copolymerization can be enumerated unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class etc.The degree of polymerization of polyvinyl alcohol resin is about 1000～10000, is preferably about 1500～5000.
These polyvinyl alcohol resins through sex change also can, for example, can use polyvinyl formal through the aldehydes sex change, polyvinyl acetal, polyvinyl butyral etc.Usually, as the raw material that polaroid is made, the about 20 μ m of used thickness～100 μ m, be preferably the not stretched PTFE film of the polyvinyl alcohol resin film of 30 μ m～80 μ m.Industrial, the width of film is that 1500mm～4000mm is practical.
Stretched PTFE film is not successively through swelling processing, dyeing processing, washing processing for this, and the thickness of final drying gained polyethenol series polaroid is about about 5～50 μ m.
The polyethenol series uniaxial extension film of polaroid of the present invention after for dichromatism pigment absorption orientation, its method for making roughly is divided into two kinds of manufacture methods.A kind of be the polyvinyl alcohol (PVA) mesentery in air or inactive gas behind the uniaxial extension, swelling is handled successively, dyeing is handled, boric acid is handled and washing is handled etc. and to be carried out solution-treated, carries out dry method at last.Second kind is that the polyvinyl alcohol (PVA) mesentery that does not extend carries out solution-treated such as swelling processing, dyeing processing, boric acid processing and washing processing with aqueous solution, and boric acid processing manufacture craft and/or its preceding manufacture craft are carried out the wet type uniaxial extension, carry out dry method at last.
In arbitrary method, uniaxial extension can carry out in a manufacture craft, also can carry out in 2 above manufacture crafts, carries out to good in most manufacture crafts.Extension method can adopt known method, for example sets between the roller that speed discrepancy extends between 2 nip rolls transporting film the hot-rolling extension method that extends, put down in writing as No. 2731813 communique of Jap.P., tentering (tenter) extension method etc.Moreover basic manufacture craft order is handled the restriction of the number of bathing and treatment conditions etc. as mentioned above.Yet, be not freely to insert the manufacture craft that does not have record in the above-mentioned manufacture craft for other purpose.The example of this manufacture craft can enumerate boric acid handle the back, by the dip treating of borated iodide (iodide processing) not or not boronic acid containing, contain dip treating (zinc processing) manufacture craft etc. of the aqueous solution of zinc chloride etc.
For remove the film Superficial Foreign Body, remove the plasticizer in the film, the easy dyeing of giving next manufacture craft, film plasticization etc. purpose and carry out the swelling manufacture craft.Treatment conditions by the scope that can realize these purposes and do not take place base material film extreme cases such as dissolving, devitrification scope and determine.During film that swelling is extended in the gas in advance, in for example about 20 ℃～70 ℃, be preferably in about 30 ℃～60 ℃ aqueous solution and carry out film immersion.About 30 seconds～300 seconds of the dip time of film, be more preferred from about about 60 seconds～240 seconds.During the film of the script that swelling is not extended in advance, in for example about 10 ℃～50 ℃, be preferably impregnated membranes in about 20 ℃～40 ℃ aqueous solution.About 30 seconds～300 seconds of the dip time of film, be more preferred from about about 60 seconds～240 seconds.
Since swelling handle in the manufacture craft film in laterally swelling, be easy to generate problem such as gauffer, with widen roller (spread rolls), propellers, roll roller, intersecting guide plate, bending, folder formula forming machine etc., known to widen that device removes the gauffer of film and transport film be good.In order to make the film in the bath transport stabilization, with the current during shower nozzle control swelling is bathed in the water, or and with the EPC device (Edge Position Control device: detect film end, prevent the device that film crawls) all useful.In this manufacture craft, on the traffic direction of film, also there is the swelling of film to enlarge, so, consider that the methods such as the roller speed of transporting before and after the control and treatment groove are good for eliminating the fine wrinkle of film on the carriage direction.Moreover, the swelling of using is handled and is bathed except that pure water, also can use the aqueous solution that is added with boric acid (putting down in writing in the Japanese kokai publication hei 10-153709 communique), chloride (putting down in writing in the Japanese kokai publication hei 06-281816 communique), mineral acid, inorganic salts, water-miscible organic solvent, alcohols etc. in about 0.01 weight %～10 weight % scopes.
The dyeing manufacture craft of using the dichromatism pigment for making purposes such as the dichromatism pigment adsorbs on film, orientation carry out.Treatment conditions by the scope that can realize these purposes and do not take place base material film extreme cases such as dissolving, devitrification scope and determine.When using iodine as the dichromatism pigment, for example about 10 ℃～45 ℃, be preferably under about 20 ℃～35 ℃ temperature, and weight ratio be the concentration of iodine/KI/ water=about 0.003～0.2/ about 0.1～10/100 carry out about 30 seconds～600 seconds, be preferably 60 seconds～300 seconds dip treating.Also can use other iodide for example zinc iodide etc. replace potassium iodide.Moreover potassium iodide also can and be used with other iodide.Moreover, the compound beyond the iodide, for example coexistences such as boric acid, zinc chloride, cobalt chloride also can.When adding boric acid, be different from following boric acid on the iodine this point and handle containing.If the water with respect to 100 weight portions contains the iodine of having an appointment more than 0.003 weight portion, can regard staining trough as.
When using the dichromatism pigment as water-soluble dichroic dye, in about 20 ℃～80 ℃, be preferably under about 30 ℃～70 ℃ temperature, and weight ratio be the concentration of dichroic dye/water=about 0.001～0.1/100 carry out about 30 seconds～600 seconds, be preferably about 60 seconds～300 seconds dip treating.Use in the aqueous solution of dichroic dye and also can contain dyeing assistant etc., for example also can contain inorganic salts, interface activating agents etc. such as sodium sulphate.Dichroic dye can also can use by dichroic dye more than 2 kinds separately simultaneously.
Film is extended.The methods such as nip rolls maintenance speed discrepancy that extend through the staining trough front and back are carried out.Moreover, identical with the swelling manufacture craft, also can and/or bathe the setting of place, gateway in dye bath and widen roller (spread rolls), propellers, roll roller, bending etc.
Boric acid is handled by dipping in the aqueous solution that contains 1～10 weight portion boric acid of having an appointment in 100 weight parts waters and is carried out through the polyvinyl alcohol (PVA) mesentery of dichromatism pigment dyeing.When the dichromatism pigment was iodine, the content of iodide was that about 1～30 weight portion is good.
Iodide can be enumerated potassium iodide, zinc iodide etc.Moreover, the compound beyond the iodide, for example coexistences such as zinc chloride, cobalt chloride, zirconium chloride, sodium thiosulfate, sodium sulphite, sodium sulphate also can.
For owing to building bridge and water-fastization and adjust colourity (having prevented a little blueness (blue-tinged)) and implement this boric acid and handle.In order during water-fastization, except that boric acid or with boric acid, to coexist in response to needs owing to build bridge, also can use glyoxal, bridging agent such as glutaraldehyde.Handle for the boric acid of water-fastization water-fastization of being called as processing is also arranged, the titles such as processing, immobilization processing of building bridge.Moreover, handle for the boric acid of chromaticity also have the complementary color of being called as to handle, dyeing is handled etc. again.
This boric acid is handled the concentration of mesoboric acid and iodide, the temperature that processing is bathed suits to change because of its purpose is different.
For the boric acid of water-fastization is handled, handle not special difference with the boric acid that is chromaticity, implement with following condition.
Film originally carries out in swelling, dyeing, the boric acid processing, the purpose that boric acid is handled is for because of water-fastization of bridge formation the time, use the boric acid of the iodide of the boric acid that contains 3～10 weight portions of having an appointment in the water of 100 weight portions, 1～20 weight portion to bathe, in about 50 ℃～70 ℃ usually, be preferably under about 55 ℃～65 ℃ temperature and carry out.Dip time about about 30～600 seconds usually, about 60～420 seconds for good, be preferably about 90～300 seconds.
Yet, through the pre-film that extends dye, when boric acid is handled, boric acid is handled the temperature of bathing and is generally about 50 ℃～85 ℃, about 55 ℃～80 ℃ is good.
After the boric acid processing for water-fastization, the boric acid that also can carry out adjusting for colourity is handled.When for example dichroic dye is iodine, be this purpose, use the boric acid of the iodide that contain the boric acid of 1～5 weight portion of having an appointment, about 3～30 weight portions in the water of 100 weight portions to handle and bathe, under 10 ℃～45 ℃ temperature, carry out usually.Dip time is generally about about 3～300 seconds, for about 10～240 seconds be good.
Be that the boric acid that colourity is adjusted handles, compare with handling, under lower boric acid concentration, higher iodide concentration, lower temperature, carry out usually for the boric acid of water-fastization.
These boric acid handle with most manufacture crafts carry out also can, usually, carry out with 2～5 manufacture crafts.At this moment, the aqueous solution of each used boric acid treatment trough form, temperature in above-mentioned scope identical also can, difference also can.Above-mentioned boric acid for water-fastization is handled, is handled for the boric acid of colourity adjustment and carry out also can with most manufacture crafts respectively.
Boric acid is handled in the manufacture craft, also can with the identical extension of carrying out film of dyeing manufacture craft.It is about 4.5～7.0 times that multiple is extended in final accumulation, be 5.0～6.5 times is good.
Boric acid is washed processing after handling.Washing is handled, for example by through be polyethenol series film immersion after boric acid that water-fastization and/or colourity are adjusted is handled in water, with nozzle spray water, or flood and spray and with and carry out.The temperature of water was generally about 2～40 ℃ of temperature during washing was handled, dip time be about about 2～120 seconds for good.Drying after the washing was carried out about 60～600 seconds under about 40～100 ℃ temperature in drying oven.
In each manufacture craft after extend handling, carry out Tension Control and also can for the tension force that makes film reaches substantial certain value separately.
After extension is finished in the processing manufacture craft that dyes, carry out Tension Control in later boric acid processing manufacture craft and washing processing manufacture craft.Extend when having finished in the preceding manufacture craft of handling manufacture craft that dyes, in comprising the later manufacture craft of dyeing processing manufacture craft and boric acid processing manufacture craft, carry out Tension Control.
When boric acid processing manufacture craft is made up of most boric acid processing manufacture crafts, extend above-mentioned film in the manufacture craft in handling to boric acid at first or from the beginning of the 2nd section, handle next boric acid processing manufacture craft of manufacture craft from the boric acid that extends processing and to each manufacture craft of washing manufacture craft, carry out Tension Control, or extending above-mentioned film in the manufacture craft in handling to boric acid at first or from the beginning of the 3rd section, next boric acid that the boric acid that extends processing is certainly handled manufacture craft is handled manufacture craft, and to carry out Tension Control to each manufacture craft of washing manufacture craft be good.But it is industrial, extend above-mentioned film in the manufacture craft in handling to boric acid from the beginning of the 2nd section at first or, next boric acid that the boric acid that extends processing is certainly handled manufacture craft is handled manufacture craft and carry out Tension Control for better to each manufacture craft of washing manufacture craft.
After boric acid is handled, when carrying out above-mentioned iodide processing or zinc processing, also carry out Tension Control in these manufacture crafts.
In each manufacture craft tension force identical also can, difference also can.
The tension force of film in the Tension Control is not special limit value, suits to be set in the about 150N/m～2000N/m of the per unit width of cloth, is preferably in the scope of about 600N/m～1500N/m.Tension force is lower than about 150N/m, and then film is easy to generate gauffer.On the other hand, tension force is if surpass about 2000N/m, then generation owing to film disrumpent feelings and bearing wear hang down problems such as life-spanization.Moreover near the film web of the tension force of this per unit width of cloth this manufacture craft inlet calculated in the tension value of tension force detector.
Yet, when carrying out Tension Control, the situation of some extensions or contraction being arranged inevitably, these are not included in the extension processing of the present invention.
Among the present invention, at least one guide roller in the treating fluid uses the foamed rubber roller.The use number of foamed rubber roller is not particularly limited, the whole uses in handle bathing also can, a part is used and also can.
In the foamed rubber roller, the hardness of sponge is about 20～60 degree with the JIS Xiao Shi C scale of JIS K 6301 test method determinations, and about 25～50 degree are for good, and density is 0.4～0.6g/cm
3, about 0.42～0.57g/cm
3For good, surfaceness is expressed as about 10～30S, is preferably about 15～25S with the equispaced of the local crowning of the roughness curve of JIS B 0601 (surfaceness) is good.
Guide roller is when widening roller in the treating fluid, and it widens roller for foamed rubber is good.It is good particularly using foamed rubber to widen roller in the swelling processing manufacture craft.Swelling is handled in the manufacture craft, and the polyvinyl alcohol (PVA) mesentery does not stop applying tension force then generation gauffer or folding line on roller because of absorbing body lotion in longitudinal and transverse two direction swellings, particularly banner direction swelling.Use foamed rubber to widen roller, then because of its width greatly in light weight reduce the tension force that puts on film, simultaneously based on the high film ability of the controlling height of its surfaceness, even also can giving full play to, low-tension widens power, and also can maximum limit performance widens another effect of roller-prevent the function of crawling, gauffer from tailing off, folding line becomes and do not have.The use that foamed rubber is widened roller is not limited in the swelling processing, and other also can use in handling.
As above can obtain polarizer with solid applying diaphragm on the single face at least of the polaroid of Zhi Zaoing.
Diaphragm can be enumerated the film that polyester based resins such as film, polyethylene terephthalate or polyethylene naphthalenedicarboxylate ester, polybutylene terepthatlate that acetate fiber such as Triafol T or cellulose diacetate prime system resin for example constitutes constitute, the film that polycarbonate-based resin constitutes, the film that the cyclic olefine resin constitutes etc.Commercially available thermoplasticity cyclic olefine resin has " Topas " (registered trade mark) of the Ticona company sale of Germany, " Arton " (registered trade mark) that JSL (thigh) sells, " Zeonoa " " Zeonix " (being all registered trade mark) that Japanese Zeon (thigh) sells, " APL " (registered trade mark) that Mitsui Chemicals (incorporated company) produces etc.These cyclic olefin resins as diaphragm, can suitably be selected known method such as solvent casting method, extrusion by melting for use in the system film behind the system film.Also have through the cyclic olefine resin of system film commercially available, " SCNA " " SCA40 " of ponding chemical industry (thigh) sale etc. for example.
The thickness of diaphragm is good with thin person, but thin excessively, then intensity reduction, processability deterioration; Problem such as on the other hand, blocked uply produce then that the transparency reduces, necessary digestion time is elongated behind the lamination.Therefore, the suitable thickness of diaphragm is about 5～200 μ m, for about 10～150 μ m are good, is preferably about 20～100 μ m.
For improving the then property of solid and polaroid and/or diaphragm, also can on polaroid and/or diaphragm, implement halation processing, flame treatment, the processing of ion slurry, ultraviolet ray irradiation, elementary coating processing, saponification processing etc.
Diaphragm also can be implemented anti-dazzle processing, anti-reflex treated, dura mater processing, anti-charged processing, antifouling processing etc. alone or in combination.Moreover diaphragm and/or diaphragm sealer also can contain ultraviolet light absorbers such as Benzophenone based compound, benzotriazole based compound; Or plasticizers such as phenyl phosphate, phthalate compound.
This diaphragm can fit in the single face of polaroid, but also fit in the two sides.
Use between polaroid and the diaphragm aqueous medium be solid, organic solvent be solid, hot melt solid, solvent-free be solid such as solid and lamination.Aqueous medium solid for example polyvinyl alcohol resin aqueous solution, water system two-liquid type carbamate is an emulsion solid etc.; Organic solvent be solid for example the two-liquid type carbamate be solid; Solvent-free be solid for example a liquid type carbamate be solid etc.The cellulose acetate mesentery that carries out hydrophilicity-imparting treatment by the surface that saponification and polaroid are followed is during as diaphragm, and the suitable polyvinyl alcohol resin aqueous solution of using is as solid.In the polyvinyl alcohol resin as the solid use, except that the alcotex of single aggressiveness polyvinyl acetate gained of saponification vinyl acetate, have vinyl acetate with can with the multipolymer of other monomer of its copolymerization ethenol system copolymer through the saponification gained, further the hydroxyl of these compounds is through the upgrading vinol series polymer of part upgrading etc.Also can multivalence aldehyde in this solid, soluble epoxide compound, melamine etc. use as adjuvant.
The method of applying polaroid and diaphragm is not particularly limited, and for example evenly covers on coating solid, the coated face on the surface of polaroid or diaphragm behind another film with methods such as applyings such as roll shaft, dryings.
Usually, solid modulation back is in about 15～40 ℃ of coatings down, and the binding temperature scope is generally about about 15～30 ℃.Carry out dried after the applying, remove contained water equal solvent in the solid, this moment, the baking temperature scope was generally about 30～85 ℃, and about 40～80 ℃ is good.About 15～85 ℃, preferable about 20～50 ℃, be more preferred from about 35～45 ℃ temperature environments under, usually about about 1～90 day aging solid sclerosis also can thereafter.Because this digestion time is long, productivity is not good, between aging period about about 1～30 day, about 1～7 day was good.
As mentioned above, can obtain with the adhesion agent layer is the single face of intermediary's polaroid or the polarizer that the two sides is fitted with diaphragm.
Among the present invention, diaphragm can have the phase retardation film function, brightness promotes optical functions such as film function, reflectance coating function, semipermeable reflection film function, diffusion barrier function, optical compensation films function.Under this situation, except that by promoting optical functional films such as film, reflectance coating, semipermeable reflection film, diffusion barrier, optical compensation films in diaphragm surface lamination phase retardation film, brightness it being had these functions, diaphragm self also can have these functions.Moreover the diaphragms such as diffusion barrier with brightness lifting film function self have most functions and also can.
For example, on the said protection film, implement to handle, or enforcement can be given the phase retardation film function as the processing of records such as No. 3168850 communique of Jap.P. as the extension of records such as No. 2841377 communique of Jap.P., No. 3094113 communique of Jap.P..Moreover; on the said protection film; form micropore by the method for opening the record of 2003-29030 communique with TOHKEMY 2002-169025 communique or spy, or, can give thickness and improve the film function by the overlapping different cholesterol liquid crystal layer of reflection kernel wavelength of selecting more than 2 layers.By on diaphragm, forming metallic film, can give reflectance coating or semipermeable reflection film function with evaporation or sputter etc.Contain atomic resin solution by coating on said protection film, can give the diffusion barrier function.Moreover, by liquid crystal compounds such as coating and the discoid liquid-crystal compounds of orientation on said protection film, can give the optical compensation films function.Moreover directly the DBEF brightness such as (Sliem (thigh) systems) by name of applying commodity promotes film in the diaphragm surface, commercially available optically functional films such as film, commodity Sumica light (registered trade mark) (Sumitomo Chemical (thigh)) equiphase difference film by name are improved at commodity WV film visual angles such as (Fuji's photographic negative (thigh) systems) by name also can to use suitable solid.
Below, further specify the present invention with embodiment, yet the present invention is defined in these examples.
Embodiment 1
The following order conveyance of polyvinyl alcohol film is made polaroid in swelling groove, staining trough, the 1st boric acid treatment trough, the 2nd boric acid treatment trough, rinsing bowl.
Whole guide rollers in the treating fluid of swelling groove (2) are that diameter 75mm, the high 25mm in summit, sponge hardness are 25 degree with JIS Xiao Shi C scale, and density is 0.42g/cm3, and surfaceness is that the foamed rubber of 20S is widened roller.In other intention, using diameter is that the 80 NBR rubber system rollers of spending are as the guide roller in the treating fluid as 70mm, surfaceness as 0.6S, rubber hardness (Л S Xiao Shi A scale).
Make the nip rolls that is arranged at before and after the treatment trough keep speed discrepancy and extend.
With thickness be the polyvinyl alcohol film (KURARAY Polyvinylpyrrolidone VF-PS#7500, the degree of polymerization 2,400, more than the saponification degree 99.9 More %) of 75um in about 30 ℃ pure water, keep the unflagging tense situation of film to flood about 130 seconds, make its abundant swelling.This moment, the conveyance speed of film was about 0.34m/min, when observing the running status of film, can obtain the running status of stable (nothing is crawled) of non-wrinkled or folding line.The tension force of this moment is about 10N.
In the weight ratio of iodine/potassium iodide/water be the aqueous solution of 0.02/1.5/100 in carry out dip dyeing and carry out uniaxial extension (extension ratio: 4.0 times) in handling thereafter.Thereafter, the weight ratio that impregnated in potassium iodide/boric acid/water is 10/5/100, about 60 ℃ aqueous solution boric acid carries out uniaxial extension in handling to being 5.9 times from accumulation extension ratio originally.Further, be about 30 seconds of about 40 ℃ of dippings in 10/3/100 the aqueous solution in the weight ratio of potassium iodide/boric acid/water, carry out the 2nd hypoborous acid and handle.After the 2nd hypoborous acid was handled, washing was about 10 seconds in about 10 ℃ pure water.After the washing, about 60 ℃ of following dryings 2 minutes, the iodine that obtains the about 20um of thickness is polaroid.
Do not find scar or gauffer on the polaroid of gained.
The two sided coatings polyethenol series solid of the polaroid of gained; [three cellulose acetate membrane that saponification is handled is implemented on the surface to two sides applying diaphragm, " Fujitech (registered trade mark) T80UNL ", Fuji's photographic negative (thigh) system; thickness 80 μ m], about 60 ℃ of dryings were made polarizer in about 5 minutes.
Comparative example 1
Whole guide rollers in the treating fluid of swelling groove (2) are that diameter 75mm, the high 25mm in summit, rubber hardness are 80 degree with JIS Xiao Shi C scale, and density is 1.3g/cm
3, and surfaceness is to make polaroid similarly to Example 1 outside the NBR rubber system roller of 0.6S.
When observing the running status of film in the swelling groove, discovery film generation gauffer or folding line reach and slightly crawl.The tension force of this moment is about 20N.
Find gauffer or folding line on the polaroid of gained.
Claims (4)
1. polaroid manufacture method, it is successively through swelling processing, dyeing processing, boric acid processing and washing processing with the polyvinyl alcohol (PVA) mesentery, in handling in manufacture craft and the preceding manufacture craft thereof at least one, boric acid carries out the polaroid manufacture method of uniaxial extension, it is characterized in that: at least one guide roller is that foamed rubber is widened roller in the treating fluid that above-mentioned swelling is handled, dyeing is handled, boric acid is handled and washing is handled, and the sponge hardness that foamed rubber is widened roller is that JIS Xiao Shi C scale 25～50 degree, density are 0.42～0.57g/cm
3And surfaceness is 15～25S.
2. polarizer, be by the described method of claim 1 make gained polaroid the diaphragm of single-sided lamination at least and.
3. polarizer as claimed in claim 2 is characterized in that: said protection film possesses that phase retardation film, brightness promote film, arbitrary function in film and the semipermeable reflection film is improved at the visual angle.
4. optical laminate, its with the described polarizer of claim 3 with promote film from phase retardation film, brightness, the visual angle is improved at least a applying of selecting in film and the semipermeable reflection film and is formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004037793 | 2004-02-16 | ||
| JP2004037793A JP4483329B2 (en) | 2004-02-16 | 2004-02-16 | Manufacturing method of polarizing film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1657983A CN1657983A (en) | 2005-08-24 |
| CN100410696C true CN100410696C (en) | 2008-08-13 |
Family
ID=35002398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100016636A Active CN100410696C (en) | 2004-02-16 | 2005-02-03 | Manufacturing method of polaroid, polarizer and optical laminate thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4483329B2 (en) |
| KR (1) | KR101114809B1 (en) |
| CN (1) | CN100410696C (en) |
| TW (1) | TWI409507B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101544626B1 (en) * | 2007-08-24 | 2015-08-17 | 가부시키가이샤 구라레 | Polyvinyl alcohol film and method for producing the same |
| JP5548469B2 (en) * | 2010-02-15 | 2014-07-16 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP4902801B2 (en) * | 2010-06-22 | 2012-03-21 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP2012173544A (en) * | 2011-02-22 | 2012-09-10 | Nitto Denko Corp | Method for manufacturing polarizer |
| JP6066707B2 (en) * | 2012-12-13 | 2017-01-25 | 日東電工株式会社 | Manufacturing method of polarizing film |
| JPWO2014115897A1 (en) * | 2013-01-28 | 2017-01-26 | 住友化学株式会社 | Manufacturing method of polarizing film |
| TWI676645B (en) * | 2015-03-17 | 2019-11-11 | 日商三菱化學股份有限公司 | Polyvinyl alcohol film, method for producing the same, and polarizing film |
| JP7073044B2 (en) * | 2016-03-30 | 2022-05-23 | 住友化学株式会社 | Method for manufacturing polarizing film |
| JP7177590B2 (en) * | 2017-12-07 | 2022-11-24 | 日東電工株式会社 | Polarizing film manufacturing method and polarizing film manufacturing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10153709A (en) * | 1996-11-22 | 1998-06-09 | Tokai Rubber Ind Ltd | Production of polarizer film |
| JP2000147252A (en) * | 1998-11-10 | 2000-05-26 | Nitto Denko Corp | Production of polarizing film and polarizing plate |
| CN1484047A (en) * | 2002-08-08 | 2004-03-24 | �ն��繤��ʽ���� | Method for mfg of polarizer, polarizer, polarizing plate, and image display |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825543A (en) * | 1996-02-29 | 1998-10-20 | Minnesota Mining And Manufacturing Company | Diffusely reflecting polarizing element including a first birefringent phase and a second phase |
| JP2002303727A (en) * | 2001-04-06 | 2002-10-18 | Nitto Denko Corp | Method for manufacturing polarizing film |
| JP2003043252A (en) * | 2001-07-31 | 2003-02-13 | Sekisui Chem Co Ltd | Protective film for polarizer |
-
2004
- 2004-02-16 JP JP2004037793A patent/JP4483329B2/en not_active Expired - Lifetime
-
2005
- 2005-01-26 TW TW094102296A patent/TWI409507B/en active
- 2005-02-03 CN CNB2005100016636A patent/CN100410696C/en active Active
- 2005-02-04 KR KR1020050010518A patent/KR101114809B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10153709A (en) * | 1996-11-22 | 1998-06-09 | Tokai Rubber Ind Ltd | Production of polarizer film |
| JP2000147252A (en) * | 1998-11-10 | 2000-05-26 | Nitto Denko Corp | Production of polarizing film and polarizing plate |
| CN1484047A (en) * | 2002-08-08 | 2004-03-24 | �ն��繤��ʽ���� | Method for mfg of polarizer, polarizer, polarizing plate, and image display |
Non-Patent Citations (2)
| Title |
|---|
| NR海绵胶辊的研制. 汤守新等.橡胶工业，第46卷. 1999 |
| NR海绵胶辊的研制. 汤守新等.橡胶工业，第46卷. 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101114809B1 (en) | 2012-02-15 |
| TWI409507B (en) | 2013-09-21 |
| JP4483329B2 (en) | 2010-06-16 |
| CN1657983A (en) | 2005-08-24 |
| JP2005227649A (en) | 2005-08-25 |
| TW200530641A (en) | 2005-09-16 |
| KR20060041734A (en) | 2006-05-12 |
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