CN102947735A - Method for manufacturing polarizing film - Google Patents
Method for manufacturing polarizing film Download PDFInfo
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- CN102947735A CN102947735A CN2011800305432A CN201180030543A CN102947735A CN 102947735 A CN102947735 A CN 102947735A CN 2011800305432 A CN2011800305432 A CN 2011800305432A CN 201180030543 A CN201180030543 A CN 201180030543A CN 102947735 A CN102947735 A CN 102947735A
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- Prior art keywords
- widening
- film
- roller
- stretching process
- stretching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
- B29C55/026—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets of preformed plates or sheets coated with a solution, a dispersion or a melt of thermoplastic material
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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
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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
- G02B5/3083—Birefringent or phase retarding elements
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
- B29K2029/04—PVOH, i.e. polyvinyl alcohol
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0034—Polarising
Abstract
Provided is a method for manufacturing a polarizing film, which has steps in which a polyvinyl alcohol based film (1) is sequentially subjected to swelling treatment, dyeing treatment, boric acid treatment, and cleaning treatment, and the polyvinyl alcohol based film (1) is uniaxially stretched before or during any one of said steps by using the circumferential speed difference between two nip rolls (2, 2'), wherein the method for manufacturing a polarizing film has a step in which at least one wide roll (3) is disposed between the two nip rolls (2, 2') to perform widening and uniaxial stretching. The accumulated draw ratio until the widening step (including the widening step) is equal to or greater than 1.6 (the draw ratio of the widening step when no other stretching step is performed before the widening step). In the widening step, the angle between the widening direction of the wide roll (3) and the carry-out direction of the film (1) carried out from the wide roll (3) is -40 DEG to 70 DEG (if the direction in which the film travels is viewed from left to right, the carry-out direction of the film from the wide roll is 0 DEG , and clockwise angles from the carry-out direction are negative (-) and counterclockwise angles are positive (+)).
Description
Technical field
Present patent application advocates based on the right of priority on the Treaty of Paris of Japanese patent application 2010-141429 number (application on June 22nd, 2010), by quoting at this, thereby the full content of putting down in writing in the above-mentioned application is introduced in this instructions.
The present invention relates to the manufacture method for the manufacture of the light polarizing film of the polaroid that in liquid crystal indicator, uses.
Background technology
As light polarizing film, made the dichromatism pigment to polyvinyl alcohol mesentery absorption in the past and be orientated the light polarizing film that forms.It is that is, known that iodine polarizing film, the dyestuff take dichroic dye as the dichromatism pigment take iodine as the dichromatism pigment are arranged is light polarizing film etc.These light polarizing film usually are situated between the bonding agent that formed by the aqueous solution with polyvinyl alcohol resin at its at least single face, the preferred diaphragm such as two sides applying Triafol T; form polaroid; be used for as liquid crystal indicator (LCD), such as LCD TV, personal computer with the display frame of monitor, mobile phone etc.
Manufacture method as light polarizing film, known have a following method: use niproll, deflector roll, polyvinyl alcohol mesentery is immersed in the water and after making its swelling, with above-mentioned dichromatism pigment dyeing, with its stretching, then for iodine is fixed on the film polyvinyl alcohol mesentery carried out carrying out drying after boric acid processes (crosslinking Treatment), washing.At this moment, give circumferential speed to the niproll of processing the bath front and back poor, carry out the stretching of film, utilize the throughput direction of deflector roll change film, carry out film to importing, the taking-up for the treatment of fluid.
In addition, in recent years, the maximization, the function that are accompanied by liquid crystal indicator improve and the brightness raising, and the light polarizing film that is used to is wherein also required when maximizing, and improve optical characteristics and improve homogeneity in the plane.Yet, in order to obtain large-scale light polarizing film, the raw material film (former anti-Off ィ Le system) of wide cut need to be carried out uniaxial tension equably, but exist the extinction axle (below, be sometimes referred to as absorption axes) of the light polarizing film obtain that the trend of deviation, optical characteristics variation occurs.And then, in the inhomogeneous situation of the optical characteristics in face, when forming image display device, produce show irregular.
On the other hand, in patent documentation 1, disclose the boric acid treatment process and/or before operation in carry out in the manufacture method of light polarizing film of uniaxial tension, in order to obtain damage, fold still less and not have light polarizing film creasy, use and widen roller as at least one deflector roll in the treating fluid.Yet, in patent documentation 1 in the method for record, for example in staining trough when widening roller and carry out counting stretching more than 1.6 times with the accumulative total stretching ratio, the problem that the optical characteristics of the light polarizing film that have the deviation that produces absorption axes, obtains reduces.
Patent documentation 1: TOHKEMY 2005-227650 communique
Summary of the invention
Problem of the present invention is to provide the manufacture method of the light polarizing film of optical characteristics excellence.
The inventor etc. in order to solve above-mentioned problem through repeatedly the further investigation, found that while use widen roller widen carry out counting uniaxial tension more than 1.6 times with the accumulative total stretching ratio when, by making the cross direction that adds of widening roller be the direction of regulation, thereby the deviation of the absorption axes of the light polarizing film that can suppress to obtain, can obtain having the new fact of the light polarizing film of good optical characteristic, thereby finish the present invention.
That is, the manufacture method of light polarizing film of the present invention has following formation.
(1) a kind of manufacture method of light polarizing film, it has processes polyvinyl alcohol mesentery by swelling, dyeing is processed, the operation that the order of boric acid processing and cleaning treatment is processed, before these arbitrary operations or utilize two circumferential speeds between niproll poor and carry out uniaxial tension in the operation, wherein, be included between above-mentioned two niprolls and arrange at least 1 and widen roller and widen the stretching process of widening with uniaxial tension, comprise widen stretching process until widen till the stretching process the accumulative total stretching ratio (wherein, until widen in the situation of the stretching process that does not have other till the stretching process, the accumulative total stretching ratio is the stretching ratio of widening in the stretching process) be more than 1.6 times, in widening stretching process, widen roller add cross direction with respect to the angle from the outbound course of the above-mentioned film of widening roller output be-40 °～70 ° (wherein, when observing from left to right the flow direction of film, film is made as 0 ° from the direction of widening roller output, to be made as with respect to the angle that this outbound course turns clockwise-, will be made as with respect to the angle that this outbound course is rotated counterclockwise+).
(2) according to the method for record in (1), wherein, described method has the plural stretching process of widening.
(3) according to the method for record in (1) or (2), the roller of widening that will widen in the stretching process is configured in the gas.
(4) according to the method for putting down in writing in each of (1)～(3), the roller of widening of widening in the stretching process is the foamed rubber roller, and the hardness of this sponge is counted 20～60 degree with JIS Shore hardness C scale, and density is 0.4～0.6g/cm
3, and surfaceness is 10～30S.
(5) according to the method for putting down in writing in each of (1)～(4), to widen stretching in the stretching process and be and utilize wet method to stretch and carry out, the temperature of the liquid of use is 20 ℃～40 ℃.
(6) according to the method for putting down in writing in each of (1)～(5), until widen till the stretching process the accumulative total stretching ratio (wherein, until do not have till this operation in the situation of other stretching process, the accumulative total stretching ratio is the stretching ratio in this operation) be more than 2 times.
According to the manufacture method of light polarizing film of the present invention, play the absorption axes deviation that can suppress resulting light polarizing film, the effect of making the light polarizing film of optical characteristics excellence.
Description of drawings
Fig. 1 is that the setting of expression among the present invention widened roller and widened key diagram with the embodiment widening stretching process of uniaxial tension.
Fig. 2 is the front view (FV) of the example widening roller among expression the present invention.
Fig. 3 is the key diagram of relation that the outbound course that adds cross direction and film of roller is widened in expression, and to widen the cross direction that adds of roller be the situation of (a) 70 °, (b) 0 °, (c)-40 ° with respect to the angle of the outbound course of film in expression respectively.
Embodiment
(manufacture method of light polarizing film)
It is the resin that the resin saponification forms that the common illustration of polyvinyl alcohol resin of the formation polyvinyl alcohol mesentery among the present invention has polyvinyl acetate.As saponification degree, usually be about more than 85 % by mole, preferably be about more than 90 % by mole, be more preferably 99 % by mole～100 % by mole.Be resin as polyvinyl acetate, except the polyvinyl acetate as the homopolymer of vinyl acetate, also can enumerate vinyl acetate and the multipolymer that can carry out with it other monomer of copolymerization, for example, vinyl-vinyl acetate copolymer etc.As other monomer that can carry out copolymerization, such as enumerating unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class etc.As the degree of polymerization of polyvinyl alcohol resin, usually be about 1000～10000, preferably be about about 1500～5000.
These polyvinyl alcohol resins can be modified, and for example, also can use by the polyvinyl formal of aldehydes modification, polyvinyl acetal, polyvinyl butyral etc.Usually, as the parent material that light polarizing film is made, used thickness is about 20 μ m～100 μ m, preferably is about the unstretching film of the polyvinyl alcohol resin film of 30 μ m～80 μ m.Industrial, with regard to the width of film, approximately 1500mm～6000mm is practical.
With this unstretching film by swelling process, dyeing is processed, boric acid processes that order that (crosslinking Treatment) and washing process is processed and final drying and the thickness of the polyethenol series light polarizing film that obtains for example is about about 5～50 μ m.
Be that light polarizing film generally obtains in the following way as making the polyethenol series monadic stretching membrane after dichromatism pigment absorption and the orientation, namely, the polyvinyl alcohol mesentery that does not stretch is carried out solution-treated by the order that swelling is processed, dyeing is processed, boric acid is processed and washing is processed in aqueous solution, in the boric acid treatment process and in operation before, utilize if necessary wet method or dry method to carry out uniaxial tension, carry out at last drying.
Uniaxial tension among the present invention can only be widened in the stretching process at one and carry out, and also can carry out in plural operation.In the situation that carry out in the plural operation, have at least one and widen stretching process, in addition, can adopt known drawing process.As known drawing process, have between two niprolls of transport membrane, give circumferential speed poor and stretch between the roller that stretches, such as the hot-rolling pulling method put down in writing in No. 2731813 communique of Jap.P., tentering (tenter) pulling method etc.Certainly, can repeatedly widen stretching process.In addition, the order of operation but does not limit the number of process bathing, treatment conditions etc. as mentioned above basically.
In addition, can certainly freely be inserted in unrecorded operation in the above-mentioned operation according to other purpose.As the example of this operation, can enumerate after boric acid is processed, utilize the dip treating (iodide processing) that not borated iodide aqueous solution carries out or utilize boronic acid containing not and dip treating (zinc processing) operation that the aqueous solution of Containing Zinc Chloride etc. is carried out etc.
The swelling operation can be for the foreign matter of removing the film surface, except the plastifier in the striping, give easy dyeing in the subsequent processing, make the purpose such as film plasticization and carry out.Treatment conditions are determined by the scope that can reach these purposes and the scope that do not produce the unfavorable conditions such as extreme dissolving, devitrification of base material film.In the situation that makes the film swelling that has stretched in advance in gas, for example impregnated membranes is carried out in approximately 20 ℃～70 ℃, preferred approximately 30 ℃～60 ℃ aqueous solution.The dip time of film preferably is about 30 seconds～and 300 seconds, further preferably be about about 60 seconds～240 seconds.Should illustrate, when making the raw material film swelling that does not stretch when beginning, for example impregnated membranes is carried out in approximately 10 ℃～50 ℃, preferred approximately 20 ℃～40 ℃ aqueous solution.The dip time of film preferably is about 30 seconds～and 300 seconds, further preferably be about about 60 seconds～240 seconds.
Should illustrate, polyvinyl alcohol mesentery carried out can carry out uniaxial tension in swelling, dyeing, the acid-treated situation of boron in the swelling operation, the stretching ratio as this moment is generally 1.2～3 times, is preferably 1.3～2.5 times.
In the swelling treatment process, make film the problems such as gauffer occur owing to easily producing film swelling on Width, so preferably widen the known Widening devices such as roller (expander roll), propellers (spiral roll), convex surface roller (crown roll), cloth guider (cloth guider), curved rod (bend bar), tentering clip (tenter clip) except transport membrane in the gauffer of striping in usefulness.For making film in the bath carry the purpose of stabilization, in the water spray be controlled at swelling in bathing current or and also be useful with EPC device (Edge Position Control device: detect the end of film, prevent the device that film crawls) etc.In this operation, because also carrying out swelling on the direction of travel of film, film enlarges, so in the situation that film is not actively stretched, in order to eliminate the lax of film at throughput direction, such as the means such as speed of preferably taking to control the conveying roller before and after the treatment trough.In addition, process in the bath in the swelling of using, except using pure water, also can use with the about scope of 0.01 % by weight～10 % by weight and add the aqueous solution that 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. form.
The dyeing process that utilizes the dichromatism pigment is so that the dichromatism pigment carries out purposes such as film absorption, orientations.Treatment conditions are determined by the scope that can realize these purposes and the scope that do not produce the unfavorable conditions such as extreme dissolving, devitrification of base material film.In the situation that use iodine as the dichromatism pigment, for example, under approximately 10 ℃～45 ℃, preferred approximately 20 ℃～35 ℃ temperature, and approximately carrying out preferred approximately 60 seconds～300 seconds dip treating approximately 30 seconds～600 seconds under 0.1～10/100 the concentration in weight ratio iodine/KI/ water=approximately 0.003～0.2/.Can use other iodide, replace potassium iodide such as zinc iodide etc.In addition, can and use other iodide and potassium iodide.In addition, also can make iodide compound in addition, coexistences such as boric acid, zinc chloride, cobalt chloride.In the situation that add boric acid, distinguish containing aspect the iodine to process with following boric acid.As long as with respect to water 100 weight portions, contain the above iodine of 0.003 weight portion of having an appointment, just can regard staining trough as.
Use in the situation of water-soluble dichroic dye as the dichromatism pigment, for example under approximately 20 ℃～80 ℃, preferred approximately 30 ℃～70 ℃ temperature, and under the concentration in weight ratio dichroic dye/water=approximately 0.001～0.1/100, carry out approximately 30 seconds～600 seconds, preferred approximately 60 seconds～300 seconds dip treating.The aqueous solution of the dichroic dye that uses can have dyeing assistant etc., such as containing inorganic salts, the surfactant etc. such as sodium sulphate.Dichroic dye can use separately, also can use simultaneously two or more dichroic dyes.
Polyvinyl alcohol mesentery by in the situation that swelling is processed, dyeing is processed, the acid-treated order of boron is processed, usually, is carried out the stretching of film in staining trough.Until the accumulative total stretching ratio till the dyeing processing (until do not have till this operation in the situation of stretching process, the accumulative total stretching ratio is the stretching ratio in this operation) is generally 1.6～4.5 times, be preferably 1.8～4 times.In addition, until when being lower than 1.6 times, existing the frequency of film fracture to become more, the accumulative total stretching ratio of dyeing till processing make the trend of yield rate variation.
Stretching is to carry out with making niproll before and after the staining trough have the methods such as circumferential speed is poor.In addition, with the swelling operation similarly, also can be in dye bath and/or bathe setup of entrances and exits and widen roller (expander roll), propellers (spiral roll), convex surface roller (crown roll), cloth guider (cloth guider), curved rod (bend bar) etc.Should illustrate, the uniaxial tension among the present invention is also applicable to the arbitrary operation in swelling operation, dyeing process, boric acid treatment process and the matting.
Boric acid is processed in the aqueous solution by the boric acid that contains 1～10 weight portion of having an appointment at the water with respect to 100 weight portions, dipping by the dichromatism pigment dyeing polyvinyl alcohol mesentery carry out.The dichromatism pigment is in the situation of iodine, preferably contains the iodide of 1～30 weight portion of having an appointment.
As iodide, can enumerate potassium iodide, zinc iodide etc.In addition, also can make iodide compound in addition, coexistences such as zinc chloride, cobalt chloride, zirconium chloride, sodium thiosulfate, potassium sulfite, sodium sulphate.
This boric acid is processed in order to implement by crosslinked water-fastization of realization, hue adjustment (preventing band blueness etc.) etc.In the situation that for by crosslinked water-fastization of realization, as required, except boric acid, perhaps with boric acid, also can use glyoxal, the crosslinking chemical such as glutaraldehyde.
Should illustrate, sometimes also will process for the boric acid of water-fastization and call with titles such as water-fastization processing, crosslinking Treatment, immobilization processing.In addition, sometimes also will for the boric acid of hue adjustment process with complementary color process, the title such as dyeing processings is called again.
This boric acid is processed the concentration that can suitably change according to its purpose boric acid and iodide, the temperature of processing bath is carried out.
The boric acid that is used for water-fastization is processed, is used for the boric acid of hue adjustment and processes not special difference, implements by following condition.
The raw material film is carried out in swelling, dyeing, the acid-treated situation of boron, boric acid is processed when turning to purpose by crosslinked realization is water-fast, use with respect to water 100 weight portions contain the boric acid of 3～10 weight portions of having an appointment, approximately the boric acid of the iodide of 1～20 weight portion process to be bathed usually at approximately 50 ℃～70 ℃, preferably under approximately 53 ℃～65 ℃ temperature, carry out.Dip time is about about 10～600 seconds usually, is preferably 20～300 seconds, more preferably 20～200 seconds.
Should illustrate, the film that has stretched is in advance dyeed, in the acid-treated situation of boron, boric acid is processed the temperature of bathing and usually is about 50 ℃～85 ℃, preferably is about 55 ℃～80 ℃.
Can after the boric acid that is used for water-fastization is processed, carry out processing for the boric acid of hue adjustment.For example dichroic dye is in the situation of iodine, for this purpose, uses with respect to water 100 weight portions to contain the boric acid of 1～5 weight portion of having an appointment, the approximately boric acid processing bath of the iodide of 3～30 weight portions, carries out under common approximately 10 ℃～45 ℃ temperature.Dip time was generally about 1～300 second, was preferably 2～100 seconds.
These boric acid are processed and can repeatedly be carried out, and usually, mostly carry out 2～5 times.At this moment, the aqueous solution of each boric acid treatment trough of use forms, temperature can be identical in above-mentioned scope, also can be different.Can in a plurality of operations, carry out respectively the boric acid processing that hue adjustment was processed, was used for to above-mentioned boric acid for water-fastization.
The final accumulative total stretching ratio that light polarizing film among the present invention stretches is about 4.5～7 times usually, preferably is about 5～6.5 times.
Boric acid is washed after processing.Washing is processed by for example, will carry out for water-fastization and/or hue adjustment the acid-treated polyvinyl alcohol mesentery of boron be immersed in the water, spray take water as the spray thing or by and with dipping with spray and carry out.The temperature of the water during washing is processed is about about 2～40 ℃ usually, and dip time is about about 2～120 seconds and gets final product.
By in drying oven approximately 40～100 ℃ temperature under making polyvinyl alcohol mesentery dry approximately 60～600 second, thereby can access light polarizing film thereafter.
Should illustrate, widen roller even if in boric acid treatment process and cleaning treatment operation, also can use.
(widening stretching process)
In arbitrary operation in above-mentioned treatment process, perhaps in the stretching process different from these operations, film carries out uniaxial tension between two niprolls.That is, make the circumferential speed of niproll in the downstream on the throughput direction of film larger than the circumferential speed of the niproll of upstream side, film is given tension force and stretched.
At this moment, among the present invention, at least one operation in stretching process, arrange at least 1 and widen roller between two niprolls, the limit is widened the film limit and is carried out uniaxial tension (widening stretching process).
Until of the present inventionly be provided with the accumulative total stretching ratio till the stretching process widened of widening roller (wherein, until do not have in the situation of stretching process till widening operation, the accumulative total stretching ratio refer to the stretching ratio in widening stretching process.Below identical) be more than 1.6 times, be preferably more than 2 times, in addition, be generally below 7 times, be preferably below 6.5 times, give full play to thus the effect of the deviation of decrease uptake axle.Until when widening accumulative total stretching ratio till the stretching process and being lower than 1.6 times, might can't obtain the effect of sufficient decrease uptake axle deviation, in addition, as mentioned above, until carry out accumulative total stretching ratio till the dyeing process of stretching process when being lower than 1.6 times, there is the frequency of film fracture to become many trend.The accumulative total stretching ratio is with uniaxial tension and widens the multiplying power that the multiplying power of stretching adds up to, and uniaxial tension, widens stretching when carrying out respectively repeatedly, becomes whole in them of accumulative total and the multiplying power that obtains.
Stretching can be used any in dry method and the wet method, Yi Bian but preferably carry out with film being immersed in the so-called wet method pulling method that stretches in the solution of regulation on one side.With regard to this wet method pulling method, film is difficult to fracture, can fully stretch, so easily obtain essential optical characteristics, compares degree of polarization with the dry method tension method and uprises.
Below, describe the embodiment of the uniaxial tension among the present invention in detail with figure.Fig. 1 is the key diagram of the embodiment widening stretching process among expression the present invention, and Fig. 2 is the front view (FV) of the example widening roller among expression the present invention.
In treatment trough shown in Figure 1 10, for example fill treating fluid 4(, iodine, potassium iodide aqueous solution), at the upstream side of the throughput direction of the polyvinyl alcohol mesentery 1 by wherein niproll 2 is set, in the downstream niproll 2 ' is set, between two niprolls, arranges and widen roller 3, deflector roll 5.As shown in Figure 2, widen roller 3 and have crooked shape.Widen in the stretching process at this, polyvinyl alcohol mesentery 1 is immersed in the treating fluid 4, be situated between and by widen roller 3 be stretched on one side, on one side by utilizing poor being stretched of circumferential speed between two niprolls 2,2 '.Should illustrate, at this moment, widen roller 3 and can be many.
In addition, Fig. 3 (a)～(c) is the key diagram of relation that the outbound course that adds cross direction M and film of roller is widened in expression.
The cross direction M that adds that widens roller 3 is being important improving aspect the optical characteristics of light polarizing film, and adding cross direction M is-40 °～70 ° with respect to the angle θ of the outbound course of film 1, more preferably-30 °～and 30 ° scope.Wherein, shown in Fig. 3 (a)～(c), when observing from left to right the flow direction of film 1, the outbound course of film 1 is made as 0 °, to be made as with respect to the angle that this outbound course turns clockwise-, will be made as with respect to the angle that this outbound course is rotated counterclockwise+.In Fig. 3, the expression cross direction that adds of widening roller is (a) 70 ° with respect to the angle of the outbound course of film respectively, (b) 0 °, and situation (c)-40 °.When angle θ departed from above-mentioned scope, the absorption axes of light polarizing film was upper uneven at certain orientation (throughput direction of film), therefore caused the problem of the optical characteristics reduction of film.
The radius-of-curvature of widening roller 3 of using is preferably 1000～50000mm, 10000～40000mm more preferably, and the diameter d of widening roller 3 is preferably 50～300mm, more preferably 75～200mm.
Particularly, change in large swelling operation, the dyeing process at width dimensions that the swelling by film causes, arrange in a plurality of situations of widening roller, at least one is set in gas widens roller 3 and use the present invention, thereby can suppress the generation of gauffer, and can improve optical characteristics.
Arrange in many situations of widening roller 3, use the roller 3 of widening of the present invention mostly to be suitable, very preferably apply the present invention to all widen roller 3, that is, will all widen roller 3 and be arranged between two niprolls 2,2 '.
As the material of widening roller in the manufacturing process of the present invention, can enumerate rubber, sponge etc., more preferably the foamed rubber roller.Polyvinyl alcohol mesentery absorbs by body lotion and carries out swelling at length, width both direction, particularly, if the swelling on the Width then easily produces gauffer, folding line at roller without giving tension force with stopping.If use the foamed rubber roller as widening roller, then owing to high based on the film hold of its high surfaceness, therefore can bring into play and widen fully power, and prevent also to greatest extent performance of function as crawling of another effect of widening roller, gauffer tails off, without folding line.
As the foamed rubber roller that uses in the present invention, the hardness of preferred sponge is about 20～60 degree in the JIS Shore hardness C scale with the determination of test method of JIS K6301, is more preferably 25～50 degree, and density is about 0.4～0.6g/cm
3, be more preferably 0.42～0.57g/cm
3, and surfaceness is with JIS B 0601(surfaceness) the equispaced S of Local Vertex of roughness curve represent, be about 10～30S, be more preferably 15～25S.
In addition, in the above-mentioned situation that is stretched as the wet method stretching of widening in the stretching process, the temperature of the solution of impregnated membranes is generally 2～70 ℃ and gets final product, particularly at 20～40 ℃, preferably under the temperature of 25～35 ℃ scope, be situated between when widening roller and stretch, can be in the situation that least reduce optical characteristics and stretch to greatest extent.
In each operation after widening stretching process, can become in fact respectively with the tension force of film certain mode and carry out tension force control.
After boric acid is processed, when carrying out above-mentioned iodide processing or zinc processing, preferably these operations are also carried out tension force control.
Tension force in each operation can be identical, also can be different.The tension force to film in the tension force control is not particularly limited, and at the about 150N/m～2000N/m of per unit width, suitably sets in the scope of preferred approximately 600N/m～1500N/m.If tension force is lower than approximately 150N/m, then gauffer etc. easily occurs in film.On the other hand, if tension force surpasses approximately 2000N/m, then sometimes produce the problems such as low life-span that caused by film fracture, bearing wear.In addition, the tension force of this per unit width is to be calculated by near the film width the entrance of this operation and the tension value of tension detector.
Should illustrate, when carrying out tension force control, sometimes stretch a little inevitably, shrink, but in the present invention, this situation not be included in the stretch processing.
By at least single-sided lamination diaphragm of usefulness bonding agent in the light polarizing film of making like this, thereby can obtain polaroid.
As diaphragm; for example; can enumerate the film that the acetate fiber prime system resin by Triafol T, cellulose diacetate and so on consists of; the film that is consisted of by the polyester based resin of polyethylene terephthalate, PEN, polybutylene terephthalate and so on; the film that is consisted of by polycarbonate-based resin; be the film that resin consists of by cyclenes, acrylic resin film, polypropylene-based resin film.
In order to improve the cementability of bonding agent and light polarizing film and/or diaphragm, can implement the surface treatments such as corona treatment, flame treatment, Cement Composite Treated by Plasma, ultraviolet ray irradiation, priming paint coating processing, saponification processing to light polarizing film and/or diaphragm.
Embodiment
Next, enumerate embodiments of the invention and be specifically described, but the present invention is not limited by these embodiment fully.
The assay method of＜absorption axes＞
Take the Width of film as benchmark, take banded diaphragm with respect to this reference axis take length direction 50mm, Width as the mode of full duration, use automatic double refraction detection device (Da mound electronics corporation system, trade name " RETS "), to with this diaphragm on Width 9 five equilibriums and each position, measure the absorption axes angle.In the shaft angle degree that obtains, adopt the difference of maximal value and minimum value as the deviation of absorption axes.
(embodiment 1)
On one side the polyvinyl alcohol film (saponification degree is more than 99.9 % by mole for Kuraray Vinylon VF-PS#7500, the degree of polymerization 2400) of thickness 75 μ m is immersed in 30 ℃ the pure water and makes fully swelling of film, Yi Bian carry out uniaxial tension to 1.30 times.
Then, on one side film immersion is counted with weight ratio in 30 ℃ the staining trough of 0.02/2.0/100 at iodine/potassium iodide/water, carry out uniaxial tension as shown in Figure 1 on one side, so that become 2.80 times in the accumulative total stretching ratio.This moment widen roller add cross direction with respect to from the angle of the outbound course of the above-mentioned film of widening roller output (wherein, when observing from left to right the flow direction of film, the outbound course of film 1 is made as 0 °, to be made as with respect to the angle that this outbound course turns clockwise-, to be made as with respect to the angle that this outbound course is rotated counterclockwise+) (below, be called the angle of widening roller) be 0 °, carry.Thereafter, on one side with film immersion in potassium iodide/boric acid/water is counted 55 ℃ of aqueous solution of 12/4.4/100 with weight ratio, carry out uniaxial tension on one side, until the total stretching ratio of accumulative total of starting at from the raw material film becomes till 5.5 times, afterwards, being immersed in potassium iodide/boric acid/water counts with weight ratio in 40 ℃ of aqueous solution of 9/2.9/100.Next, cleaned for 8 seconds with 5 ℃ pure water, 70 ℃ of dryings 3 minutes, obtain light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.04 °.
(embodiment 2)
Making the angle of widening roller in staining trough is 30 °, in addition, obtains similarly to Example 1 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.08 °.
(embodiment 3)
Making the angle of widening roller in staining trough is 60 °, in addition, obtains similarly to Example 1 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.12 °.
(embodiment 4)
Making the angle of widening roller in staining trough is-30 °, in addition, obtains similarly to Example 1 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.09 °.
(embodiment 5)
On one side the polyvinyl alcohol film (saponification degree is more than 99.9 % by mole for Kuraray Vinylon VF-PS#7500, the degree of polymerization 2400) of thickness 75 μ m is immersed in 30 ℃ the pure water, makes fully swelling of film, Yi Bian carry out uniaxial tension to 1.30 times.
Then, on one side film immersion is counted with weight ratio in 30 ℃ the staining trough of 0.02/2.0/100 at iodine/potassium iodide/water, carry out uniaxial tension as shown in Figure 1 on one side, so that become 1.65 times in the accumulative total stretching ratio.The angle of widening roller of this moment is 0 °, carries.Thereafter, on one side with film immersion in potassium iodide/boric acid/water is counted 53 ℃ of aqueous solution of 11/3.5/100 with weight ratio, uniaxial tension is carried out on the limit, until the accumulative total stretching ratio raw material film of starting at from the raw material film becomes till 5.8 times, afterwards, being immersed in potassium iodide/boric acid/water counts with weight ratio in 40 ℃ of aqueous solution of 11/3.5/100.Next, cleaned for 8 seconds with 5 ℃ pure water, 70 ℃ of dryings 3 minutes, obtain light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.10 °.
(embodiment 6)
Making the angle of widening roller in staining trough is 30 °, in addition, obtains similarly to Example 5 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.13 °.
(embodiment 7)
Making the angle of widening roller in the staining trough is 60 °, in addition, obtains similarly to Example 5 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.15 °.
(comparative example 1)
Making the angle of widening roller in staining trough is 90 °, in addition, obtains similarly to Example 1 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.23 °.
(comparative example 2)
Making the angle of widening roller in staining trough is 90 °, in addition, obtains similarly to Example 5 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.24 °.
The result of above-described embodiment 1～4 and comparative example 1 is illustrated following.
Table 1:
As shown in Table 1, embodiment 1～7 compares with comparative example 1,2, and the deviation of absorption axes (maximal value-minimum value poor) is little.
(embodiment 8)
In the swelling groove, Jie is that the roller of widening in 0 ° the gas carries out stretching ratio and becomes 2.20 times uniaxial tension as shown in Figure 1 by making angle, next, in staining trough, carry out becoming 2.80 times uniaxial tension as shown in Figure 1 (angle of widening roller in the staining trough is as 0 °) take the accumulative total stretching ratio, in addition, obtain similarly to Example 1 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.11 °.
(comparative example 3)
Making the angle of widening roller in the swelling groove is 90 °, in addition, obtains similarly to Example 8 light polarizing film.The deviation of the absorption axes of the light polarizing film that obtains (maximal value and minimum value poor) is 0.34 °.
The result of above-described embodiment 8 and comparative example 3 is illustrated following.
Table 2:
As shown in Table 2, the deviation of the absorption axes of embodiment 8 (the largest – minimum poor) is lower than comparative example 3.
Symbol description
1: polyvinyl alcohol film, 2,2 ': niproll, 3: widen roller, 4: treating fluid, 5: deflector roll, 10: boric acid treatment trough (stretch processing), M: add cross direction, d: the diameter of widening roller 3
Claims (6)
1. the manufacture method of a light polarizing film, it is characterized in that, has the operation that polyvinyl alcohol mesentery is processed by the order of swelling processing, dyeing processing, boric acid processing and cleaning treatment, before these arbitrary operations or utilize two poor uniaxial tensions that carry out of the circumferential speed between niproll in the operation
Wherein, described uniaxial tension is included between two niprolls and arranges at least 1 and widen roller and widen the stretching process of widening with uniaxial tension, comprise widen stretching process until the accumulative total stretching ratio of widening till the stretching process is more than 1.6 times, wherein, until do not have in the situation of other stretching process till widening stretching process, the accumulative total stretching ratio is the stretching ratio of widening in the stretching process
In widening stretching process, the cross direction that adds of widening roller is-40 °～70 ° with respect to the angle from the outbound course of the described film of widening roller output, wherein, when observing from left to right the flow direction of film, film is made as 0 ° from the direction of widening roller output, to be made as with respect to the angle that this outbound course turns clockwise-, will be made as with respect to the angle that this outbound course is rotated counterclockwise+.
2. method according to claim 1, wherein, described method has the plural stretching process of widening.
3. method according to claim 1 and 2, wherein, the roller of widening that will widen in the stretching process is configured in the gas.
4. method according to claim 1, wherein, the roller of widening of widening in the stretching process is the foamed rubber roller, and the hardness of its sponge is counted 20～60 degree with JIS Shore hardness C scale, and density is 0.4～0.6g/cm
3, and surfaceness is 10～30S.
5. method according to claim 1 wherein, is widened stretching in the stretching process and is utilized wet method to stretch and carry out, and the temperature of the liquid of use is 20 ℃～40 ℃.
6. method according to claim 1, wherein, until the accumulative total stretching ratio of widening till the stretching process is more than 2 times, wherein, until do not have till this operation in the situation of other stretching process, the accumulative total stretching ratio is the stretching ratio in this operation.
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| JP2010-141429 | 2010-06-22 | ||
| JP2010141429 | 2010-06-22 | ||
| PCT/JP2011/064169 WO2011162259A1 (en) | 2010-06-22 | 2011-06-21 | Method for manufacturing polarizing film |
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| CN102947735A true CN102947735A (en) | 2013-02-27 |
| CN102947735B CN102947735B (en) | 2015-04-29 |
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| JP (1) | JP4902801B2 (en) |
| KR (1) | KR101760541B1 (en) |
| CN (1) | CN102947735B (en) |
| TW (1) | TWI524098B (en) |
| WO (1) | WO2011162259A1 (en) |
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| CN102681074A (en) * | 2011-02-22 | 2012-09-19 | 日东电工株式会社 | Method of manufacturing polarizer |
| CN106575008A (en) * | 2014-08-04 | 2017-04-19 | 住友化学株式会社 | Production method for polarizing film |
| CN109552923A (en) * | 2017-09-26 | 2019-04-02 | 住友化学株式会社 | The delivery method and conveying device of film and the manufacturing method and manufacturing device of process film |
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| CN115139505A (en) * | 2021-03-30 | 2022-10-04 | 日东电工株式会社 | Method for producing stretched film |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01193803A (en) * | 1988-01-29 | 1989-08-03 | Diafoil Co Ltd | Production of polarizing film |
| CN1375391A (en) * | 2001-03-21 | 2002-10-23 | 富士胶片株式会社 | Method for stretching polymer film, polarization diaphragm and method for making said polarization diaphragm, polarizer, double refraction diaphragm and liquid-crystal display device |
| CN1388152A (en) * | 2001-05-30 | 2003-01-01 | 柯尼卡株式会社 | Cellulose ester thin film, its producing process phase difference film, optical trim tab, elliptical polaroid and display device |
| US20040052937A1 (en) * | 1999-11-22 | 2004-03-18 | Fuji Photo Film Co., Ltd. | Sheet polarizer, optical film, liquid crystal display, and method of producing sheet polarizers |
| CN1484047A (en) * | 2002-08-08 | 2004-03-24 | �ն��繤��ʽ���� | Method for mfg of polarizer, polarizer, polarizing plate, and image display |
| CN1657984A (en) * | 2004-02-16 | 2005-08-24 | 住友化学株式会社 | Manufacturing method of polaroid film, polaroid plate and optical laminate |
| JP2005227649A (en) * | 2004-02-16 | 2005-08-25 | Sumitomo Chemical Co Ltd | Manufacturing method of polarizing film, polarizing plate and optical laminate |
| CN101025456A (en) * | 2006-02-24 | 2007-08-29 | 日东电工株式会社 | Method for manufacturing polarizer, polarizer, polarizing plate, optical film, image display device and cleaning device |
| JP2008307888A (en) * | 2007-05-11 | 2008-12-25 | Fujifilm Corp | Thermoplastic film, forming method and equipment of the same, polarizing plate, optical compensation film for liquid crystal display panel, antireflection film and liquid crystal display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4198559B2 (en) * | 2002-08-02 | 2008-12-17 | 日東電工株式会社 | Method for producing polarizing film, and polarizing film and optical film using the same |
-
2011
- 2011-06-21 CN CN201180030543.2A patent/CN102947735B/en active Active
- 2011-06-21 KR KR1020137000813A patent/KR101760541B1/en active IP Right Grant
- 2011-06-21 JP JP2011137262A patent/JP4902801B2/en active Active
- 2011-06-21 WO PCT/JP2011/064169 patent/WO2011162259A1/en active Application Filing
- 2011-06-22 TW TW100121857A patent/TWI524098B/en active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01193803A (en) * | 1988-01-29 | 1989-08-03 | Diafoil Co Ltd | Production of polarizing film |
| US20040052937A1 (en) * | 1999-11-22 | 2004-03-18 | Fuji Photo Film Co., Ltd. | Sheet polarizer, optical film, liquid crystal display, and method of producing sheet polarizers |
| CN1375391A (en) * | 2001-03-21 | 2002-10-23 | 富士胶片株式会社 | Method for stretching polymer film, polarization diaphragm and method for making said polarization diaphragm, polarizer, double refraction diaphragm and liquid-crystal display device |
| CN1388152A (en) * | 2001-05-30 | 2003-01-01 | 柯尼卡株式会社 | Cellulose ester thin film, its producing process phase difference film, optical trim tab, elliptical polaroid and display device |
| CN1484047A (en) * | 2002-08-08 | 2004-03-24 | �ն��繤��ʽ���� | Method for mfg of polarizer, polarizer, polarizing plate, and image display |
| CN1657984A (en) * | 2004-02-16 | 2005-08-24 | 住友化学株式会社 | Manufacturing method of polaroid film, polaroid plate and optical laminate |
| JP2005227649A (en) * | 2004-02-16 | 2005-08-25 | Sumitomo Chemical Co Ltd | Manufacturing method of polarizing film, polarizing plate and optical laminate |
| CN101025456A (en) * | 2006-02-24 | 2007-08-29 | 日东电工株式会社 | Method for manufacturing polarizer, polarizer, polarizing plate, optical film, image display device and cleaning device |
| JP2008307888A (en) * | 2007-05-11 | 2008-12-25 | Fujifilm Corp | Thermoplastic film, forming method and equipment of the same, polarizing plate, optical compensation film for liquid crystal display panel, antireflection film and liquid crystal display |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681074A (en) * | 2011-02-22 | 2012-09-19 | 日东电工株式会社 | Method of manufacturing polarizer |
| CN102681074B (en) * | 2011-02-22 | 2015-07-22 | 日东电工株式会社 | Method of manufacturing polarizer |
| CN106575008A (en) * | 2014-08-04 | 2017-04-19 | 住友化学株式会社 | Production method for polarizing film |
| CN106575008B (en) * | 2014-08-04 | 2019-12-24 | 住友化学株式会社 | Method for producing polarizing film |
| CN109552923A (en) * | 2017-09-26 | 2019-04-02 | 住友化学株式会社 | The delivery method and conveying device of film and the manufacturing method and manufacturing device of process film |
| CN110969942A (en) * | 2018-09-28 | 2020-04-07 | 乐金显示有限公司 | Rollable display device |
| CN110969942B (en) * | 2018-09-28 | 2022-01-25 | 乐金显示有限公司 | Rollable display device |
| CN114514112A (en) * | 2019-11-19 | 2022-05-17 | 日东电工株式会社 | Method for manufacturing polarizing film, apparatus for manufacturing polarizing film, and control system |
| CN115139505A (en) * | 2021-03-30 | 2022-10-04 | 日东电工株式会社 | Method for producing stretched film |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011162259A1 (en) | 2011-12-29 |
| KR101760541B1 (en) | 2017-07-21 |
| TW201234058A (en) | 2012-08-16 |
| JP4902801B2 (en) | 2012-03-21 |
| TWI524098B (en) | 2016-03-01 |
| KR20130098275A (en) | 2013-09-04 |
| CN102947735B (en) | 2015-04-29 |
| JP2012027459A (en) | 2012-02-09 |
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