CN100501464C - Manufacturing method of polarized light film, polarized light slice and optical laminate style - Google Patents
Manufacturing method of polarized light film, polarized light slice and optical laminate style Download PDFInfo
- Publication number
- CN100501464C CN100501464C CNB2006100036070A CN200610003607A CN100501464C CN 100501464 C CN100501464 C CN 100501464C CN B2006100036070 A CNB2006100036070 A CN B2006100036070A CN 200610003607 A CN200610003607 A CN 200610003607A CN 100501464 C CN100501464 C CN 100501464C
- Authority
- CN
- China
- Prior art keywords
- film
- stage
- tension force
- boric acid
- polarized light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/02—Towels
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D27/00—Woven pile fabrics
Landscapes
- Polarising Elements (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
To provide a method for manufacturing a polarizing film less liable to crease or break and having good appearance because of few streaks. In the method for manufacturing the polarizing film by sequentially subjecting a polyvinyl alcohol-based film to swelling, dyeing, boric acid treatment, washing and drying, the drying is carried out in multiple steps while applying tension to the film, the tension is controlled so that tension per unit width of the film in each step of the drying is made substantially constant, tension in the succeeding step is made lower than that in the preceding step, and a drying temperature in the succeeding step is made higher than that in the preceding step.
Description
Technical field
The fracture of generation, film that the present invention relates to fold on film is few; and striped is few and the manufacture method of the polarization film that outward appearance is good; also relate to the polarized light piece of having folded diaphragm at least one surface layer of resulting polarization film, also relate to the wantonly a kind of optical laminates that independent or a plurality of applyings form that phase retardation film, brightness is improved film, visual angle improvement film and Transflective film.
Background technology
As polarization film, use all the time and on the polyvinyl alcohol (PVA) mesentery, make the directed film of dichromatism pigment absorption.That is, known have with iodine be that the iodine of dichromatism pigment is polarization film or be that the dyestuff of dichromatism pigment is a polarization film etc. with the dichroic dye.These polarization films at its diaphragm of the bonding agent applying triacetyl cellulose etc. of one side, the preferred two sides aqueous solution by containing polyvinyl alcohol resin at least, are made polarized light piece usually.
As the manufacture method of polarization film, known following method: use niproll, deflector roll, the polyvinyl alcohol (PVA) mesentery is used stated the dichromatism pigment dyeing, and with its stretching, then for iodine is fixed on the film, the polyvinyl alcohol (PVA) mesentery is carried out boric acid handle, the washing back is dry.At this moment, give difference to the niproll of handling before and after bathing, thereby film is applied tension force, carry out the stretching of film, the throughput direction by deflector roll change film carries out importing, the derivation of film in treating fluid.
In the past, the dried of the film stage of adopting was carried out (for example with reference to patent documentation 1, patent documentation 2), at this moment, fold or film fracture can take place on the film.In addition, when observing resulting polarization film under the reflection of fluorescent light, can see that striped is many, outward appearance may not be good sometimes.
[patent documentation 1] spy opens flat 10-153709 communique
[patent documentation 2] spy opens the 2001-174634 communique
Summary of the invention
The major subjects that the present invention will solve provide a kind of on film the fracture of generation, the film of fold few, and striped is few and the manufacture method of the polarization film that outward appearance is good.
The inventor carries out lucubrate repeatedly to the manufacture method of the few polarization film of the fracture of the generation of fold on film or film, found that, adopt the multistage to carry out dried on one side when giving tension force to film on one side, carry out Tension Control, so that make the wide tension force of per unit of the film in each stage of dried reach substantial constant, and the tension force that makes after-stage is when to be that the tension force of last stage is following carry out, can make and make that the fracture of the generation of on film fold or film is few, and then, when making this moment the baking temperature of after-stage be above the carrying out of baking temperature of last stage, just obtain the polarization film that striped is few and outward appearance is good, thereby finished the present invention.
Promptly, the manufacture method of polarization film of the present invention, it is the sequential processes of the polyvinyl alcohol (PVA) mesentery being handled, washing processing and dried by swelling processing, dyeing processing, boric acid, thereby make the method for polarization film, it is characterized in that, giving tension force to film on one side adopts the multistage to carry out dried on one side, carry out Tension Control, so that make the wide tension force of per unit of the film in each stage of dried reach substantial constant, and to make the tension force of after-stage be following the carrying out of tension force of last stage; Can make in view of the above and make that the fracture of the generation of on film fold and film is few.
And then, it is characterized in that to be that the baking temperature of last stage is above carry out the baking temperature that makes after-stage, just obtains the polarization film that striped is few and outward appearance is good in view of the above.
Dried adopted for 2 stages carried out usually, the tension force of last stage is set from the scope of 600～1500N/m, the tension force of after-stage is set from the scope of 300～1200N/m, in addition, set the baking temperatures of last stages from 50～90 ℃ scopes, set the baking temperature of after-stages and carry out from 70～100 ℃ scopes.
And then polarized light piece of the present invention is the diaphragm of at least simultaneously having fitted at the polarization film that obtains as described above.This diaphragm also can possess the wantonly a kind function of phase retardation film, brightness raising film, visual angle improvement film and Transflective film.In addition, optical laminates is to have fitted to be selected from phase retardation film, brightness and to improve film, visual angle improvement film and Transflective film at least a kind on one side has been fitted the above-mentioned polarized light piece of diaphragm at least.
The method according to this invention, can make make on polarization film fold generation less, the fracture of film is few, and then can make the polarization film that striped is few and outward appearance is good.By will be few by striped and polarization film that outward appearance is good polarized light piece, the optical laminates made be used for liquid crystal indicator, just obtain high-grade liquid crystal display.
Embodiment
Below describe the present invention in detail.
The polyvinyl alcohol resin of the formation polyvinyl alcohol (PVA) mesentery among the present invention, exemplifying out polyvinyl acetate usually is the sapond resin of resin.As saponification degree is about 85 moles more than the %, preferred about 90 moles more than the %, 99 moles of %～100 mole % more preferably from about.As polyvinyl acetate is resin, except polyvinyl acetate as the homopolymer of vinyl acetate, also list vinyl acetate and can with the multipolymer of other monomers of its copolymerization, vinyl-vinyl acetate copolymer etc. is for example arranged.But, for example can list unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class etc. as other monomers of copolymerization.The degree of polymerization as polyvinyl alcohol resin is about 1000～10000, preferred about about 1500～5000.
These polyvinyl alcohol resins also can be modified, and for example also can use with aldehydes modified polyethylene alcohol formal, polyvinyl acetal, polyvinyl butyral etc.Usually as the parent material of polarization film manufacturing, used thickness is the unstretching film of the polyvinyl alcohol resin film of about 20 μ m～100 μ m, preferred about 30 μ m～80 μ m.The film of industrial practicality is wide to be about 1500mm～4000mm.
With this unstretching film by the sequential processes that swelling is handled, dyeing is handled, boric acid is handled, washing is handled, final drying and the thickness of the polyethenol series polarization film that obtains for example is about about 5 μ m～50 μ m.
Polarization film of the present invention is to make the directed polyethenol series monadic stretching membrane of dichromatism pigment absorption, and as its method for making, roughly dividing has 2 kinds of manufacture methods.1 kind of method be in air or inert gas with behind the polyvinyl alcohol (PVA) mesentery uniaxial tension, carry out solution-treated according to the order that swelling is handled, dyeing is handled, boric acid is handled and washing is handled, carry out dry method at last.
The 2nd kind of method is that the polyvinyl alcohol (PVA) mesentery that will not stretch carries out solution-treated according to the order that swelling is handled, dyeing is handled, boric acid is handled and washing is handled in aqueous solution, and the boric acid treatment process and/or before operation in carry out uniaxial tension with wet type, carry out dry method at last.
In the where method in office, uniaxial tension both can carry out in 1 operation, also can carry out in the operation more than 2, but preferably carry out in a plurality of operations.Drawing process can adopt known method, for example has: thus give between the roller that difference stretches the hot-rolling pulling method that stretches, in No. 2731813 communique of Jap.P., put down in writing, stenter pulling method etc. between 2 niprolls to transport membrane.In addition, basically the order of operation as described above, but the quantity of handle bathing, treatment conditions etc. are without limits.
In addition, being inserted in the operation that does not have in the above-mentioned operation to put down in writing for other purpose certainly also is freely.Example as this operation, list: after boric acid is handled, adopts dip treating (zinc processing) operation that the not borated aqueous solution that contains zinc chloride etc. of dip treating (iodide processing) that not borated iodide aqueous solution carries out or employing carries out etc.
The swelling operation for the foreign matter of removing the film surface, remove plastifier in the film, give purpose such as the easy dyeing in next procedure, the plasticized of film and carry out.Determine treatment conditions in the scope that can reach these purposes and in the scope that unfavorable conditions such as the extreme dissolving of ground film, devitrification do not take place.During with the film swelling that in gas, stretched in advance, impregnated membranes and carrying out in about 20 ℃～70 ℃, preferred about 30 ℃～60 ℃ aqueous solution for example.The dip time of film is about 30 seconds～300 seconds and then preferred about about 60 seconds～240 seconds.During with the initial reel that does not just stretch (former anti-) film swelling, impregnated membranes and carrying out in about 10 ℃～50 ℃, preferred about 20 ℃～40 ℃ aqueous solution for example.The dip time of film is about 30 seconds～300 seconds and then preferred about about 60 seconds～240 seconds.
In the swelling treatment process, because film is in horizontal swelling, easily be created on the film problem that fold etc. takes place, therefore preferably adopt open width roller (spread rolls), propellers, cambered roll, guide (Network ロ ス ガ イ ダ-), become roller (ベ Application De バ-) while, known open width device such as tenter clip gap eliminates the fold transport membrane of film.Carry the purpose of stabilization for the film in will bathing, perforated water spray is controlled at the current of swelling in bathing in the water, or and also is useful with EPC device (EdgePosition Control device: detect the end of membrane, prevent the device of film complications) etc.In this operation, owing to enlarge at the moving direction film of film also swelling, therefore lax for the film of eliminating throughput direction for example preferably adopted the method for the speed etc. of the conveying roller before and after the control and treatment groove.In addition, the swelling of using is handled and is bathed, except pure water, can also use the aqueous solution of having added boric acid (be recorded in the spy and open flat 10-153709 communique), chloride (be recorded in the spy and open flat 06-281816 communique), mineral acid, inorganic salts, water-miscible organic solvent, alcohols etc. in the scope of about 0.01 weight %～10 weight %.
The dyeing process of dichromatism pigment carries out for the purpose that makes film absorption dichromatism pigment and make it orientation etc.Determine treatment conditions in the scope that can reach these purposes and in the scope that unfavorable conditions such as the extreme dissolving of ground film, devitrification do not take place.When using iodine, for example be to carry out about 30 seconds～600 seconds, preferred about 60 seconds～300 seconds dip treating under the concentration of iodine/KI/ water=about 0.003～0.2/ about 0.1～10/100 under about 10 ℃～45 ℃, preferred about 20 ℃～35 ℃ temperature and in weight ratio as the dichromatism pigment.Replace potassium iodide, also can use other iodide, for example zinc iodide etc.In addition, also can and use other iodide and potassium iodide.In addition, also can make coexistences such as compound beyond the iodide, for example boric acid, zinc chloride, cobalt chloride.When adding boric acid, differentiate containing aspect the iodine to handle with following boric acid.If with respect to water 100 weight portions, contain 0.003 weight portion of having an appointment above iodine, then can regard staining trough as.
When using water-soluble dichroic dye as the dichromatism pigment, for example under about 20 ℃～80 ℃, preferred about 30 ℃～70 ℃ temperature, and be to carry out about 30 seconds～600 seconds, preferred about 60 seconds～300 seconds dip treating under the concentration of dichroic dye/water=about 0.001～0.1/100 in weight ratio.The aqueous solution of the dichroic dye that uses can contain dyeing assistant etc., for example can contain inorganic salts, surfactants etc. such as sodium sulphate.Dichroic dye can use separately, also can use the dichroic dye more than 2 kinds simultaneously.
Also stretched film in staining trough as described above.The method that stretch to adopt the niproll of the front and back that make staining trough to have difference etc. is carried out.In addition, with the swelling operation similarly, also can be in dye bath and/or bathe the gateway open width roller (spread rolls), propellers, cambered roll, guide, change roller etc. are set.
It is to be undertaken by the polyvinyl alcohol (PVA) mesentery of dipping in the aqueous solution that contains about 1～10 weight portion of boric acid with respect to water 100 weight portions with the dichromatism pigment dyeing that boric acid is handled.When the dichromatism pigment is iodine, preferably contain about 1～30 weight portion of iodide.
List potassium iodide, zinc iodide etc. as iodide.In addition, also can make coexistences such as compound beyond the iodide, for example zinc chloride, cobalt chloride, zirconium chloride, sodium thiosulfate, potassium sulfite, sodium sulphate.
Implementing this boric acid processing is to be used for by crosslinked water-fastization that causes or tone adjustment (preventing to be with blueness etc.) etc.When being used for by crosslinked water-fastization that causes, as required except that boric acid or with boric acid also can use glyoxal, crosslinking chemical such as glutaraldehyde.
The boric acid processing that also will be used for water-fastization is sometimes called with titles such as water-fastization processing, crosslinking Treatment, immobilization processing.In addition, also will be used for sometimes boric acid that tone adjusts handle with complementary color handle, the title address handled etc. of dyeing again.
This boric acid is handled and can be carried out according to the concentration of its purpose suitable change boric acid and iodide, the temperature that processing is bathed.
The difference especially of boric acid processing that tone is adjusted is handled, is used for to the boric acid that is used for water-fastization, implements under following condition.
When the reel film being carried out swelling, dyeing, boric acid processing, boric acid is handled with by crosslinked cause water-fast when turning to purpose, use handle to be bathed with respect to the boric acid that water 100 weight portions contain about 3～10 weight portions of boric acid, about 1～20 weight portion of iodide, carries out under about 50 ℃～70 ℃, preferred about 55 ℃～65 ℃ temperature usually.Normally about about 30～600 seconds of dip time, preferred about about 60～420 seconds, more preferably from about 90～300 seconds.
With the film of prestretched dye, when boric acid is handled, boric acid is handled normally about 50 ℃～85 ℃ of the temperature of bathing, preferred about 55 ℃～80 ℃.
Also can after handling, the boric acid that is used for water-fastization be used for the boric acid processing that tone is adjusted.When for example dichroic dye is iodine,, use the boric acid processing bath that contains about 1～5 weight portion of boric acid, about 3～30 weight portions of iodide with respect to water 100 weight portions, under about 10 ℃～45 ℃ temperature, carry out usually for this purpose.Normally about about 3～300 seconds of dip time, preferred about 10～240 seconds.
The boric acid that is used for the tone adjustment is handled and the boric acid that is used for water-fastization is handled ratio, carries out under low boric acid concentration, high iodide concentration, low temperature usually.
These boric acid are handled and also can be adopted a plurality of operations to carry out, and carry out with 2～5 operations mostly usually.At this moment, the aqueous solution of each boric acid treatment trough of use composition, temperature can be the same or different in above-mentioned scope.Also the boric acid that the tone adjustment was handled, was used for to the above-mentioned boric acid that is used for water-fastization can be handled and carry out with a plurality of operations respectively.
In the boric acid treatment process, also can similarly carry out the stretching of film with dyeing process.Final accumulation stretching ratio is about 4.5～7.0 times, preferred about 5.0～6.5 times.
Boric acid is washed processing after handling.Washing is handled is for example by will having carried out polyethenol series film immersion that boric acid handles in water for the purpose of water-fastization and/or tone adjustment, with water with the perforated water spray spraying or and with dipping with spray and carry out.Normally about about 2～40 ℃ of coolant-temperature gage when washing is handled, dip time can be about about 2～120 seconds.
In each operation after stretch processing, also can carry out Tension Control, so that the tension force of film reaches substantial constant respectively.
In the dyeing treatment process, be through with when stretching, carry out Tension Control in boric acid treatment process afterwards and the washing treatment process.When in the preceding working procedure of dyeing treatment process, finishing to stretch, in the later operation that comprises dyeing treatment process and boric acid treatment process, carry out Tension Control.
When the boric acid treatment process comprises a plurality of boric acid treatment process, preferably initial or, to each operation of washing step, carry out Tension Control in next boric acid treatment process from the boric acid treatment process of having carried out stretch processing from the above-mentioned film that stretches to the boric acid treatment process in the 2nd stage at first; Perhaps from the above-mentioned film that stretches to the boric acid treatment process in the 3rd stage at first, to each operation of washing step, carry out Tension Control in next boric acid treatment process from the boric acid treatment process of having carried out stretch processing, but industrial more preferably initial or from the above-mentioned film that stretches to the boric acid treatment process in the 2nd stage at first, to each operation of washing step, carry out Tension Control in next boric acid treatment process from the boric acid treatment process of having carried out stretch processing.
When after boric acid is handled, carrying out above-mentioned iodide processing or zinc processing, also carry out Tension Control about these operations.
Handling the tension force of washing each operation of handling from swelling can be identical, also can be different.
Tension force to film during Tension Control is not particularly limited, per unit wide for about 150N/m～2000N/m, the preferably setting that suits in the scope of about 600N/m～1500N/m.When tension force during less than about 150N/m, fold etc. easily takes place on the film.On the other hand, when tension force surpasses about 2000N/m, take place that film ruptures or by the problem of the low life-spanization due to the wearing and tearing of carrying plane etc.In addition, the wide tension force of this per unit is calculated with tension value tension detector near the film the inlet of its operation is wide.
When having carried out Tension Control, have a little to stretch sometimes inevitably and shrink, but this is not included in the stretch processing in the present invention.
In the present invention, on one side give tension force to film and adopt the multistage to carry out dried on one side.Carry out Tension Control, so that make the wide tension force of the per unit of the film in each stage reach substantial constant, and to make the tension force of after-stage be following the carrying out of tension force of last stage.That is, tension force (N/m) that the per unit of the film in each stage is wide is designated as N in order since the 1st stage
1, N
2, N
3The time, set N
1, N
2, N
3Make and satisfy N
1〉=N
2〉=N
3〉=...
In view of the above, can make make on film fold generation less, the fracture of film is few.
And then in the present invention, to be that the baking temperature of last stage is above carry out the baking temperature that makes after-stage.
That is, with the baking temperature in each stage (℃) be designated as T in order since the 1st stage
1, T
2, T
3The time, set T
1, T
2, T
3Make and satisfy T
1≤ T
2≤ T
3≤ ...
In view of the above, obtain the polarization film that striped is few and outward appearance is good.
Dried is preferably changing tension force a little and is carrying out in the multistage, but because the restriction on the equipment etc. are limited naturally, 2～3 stages of adopting usually carry out.2 stages of adopting, the tension force in the last stage was set from the scope of 600～1500N/m when carrying out, and the tension force in the after-stage is set from the scope of 300～1200N/m.When overtension, it is many that the fracture of film becomes, and served as hour, and becoming of fold is many, and be not preferred.
At this moment, from the baking temperature of 50～90 ℃ scopes setting last stages, set the baking temperature of after-stages from 70～100 ℃ scopes.When temperature was too high, it is many that the fracture of film becomes, and optical characteristics reduces, and served as when hanging down, and it is many, not preferred that striped becomes.
The dried time is 60～600 seconds, and can be the same or different the drying time in each stage.When the time was long, optical characteristics reduced, and has served as in short-term, and it is insufficient that drying becomes, not preferred.
As the niproll that is used for Tension Control in the present invention, be used for the deflector roll of the throughput direction of controlling diaphragm, use squeegee, stainless steel polishing roll and spongy rubber roller.
As squeegee, preferably: contain NBR etc., its hardness is about 60～90 degree, preferred about 70～80 degree under the JIS Shore C grade of the determination of test method of using JIS K 6301, surfaceness is represented with the equispaced S of the local summit of the roughness curve of JIS B 0601 (surfaceness), is about 0.1～5S, preferred about 0.5～1.
As stainless steel polishing roll, contain SUS304, SUS316 etc., from seeking on the uniform film thicknessization, its surfaceness is represented with the equispaced S of the local summit of the roughness curve of JIS B 0601 (surfaceness), be preferably about 0.2～1.0S, in addition, its kinetic friction coefficient be about 0.1～0.4, preferred about 0.15～0.35 for well.Kinetic friction coefficient among the present invention is used according to the test method of JIS K 7125 with the value representation of measuring in polyvinyl alcohol (PVA) mesentery and the water.
As the spongy rubber roller, the hardness of cavernous body is about 20～60 degree, preferred about 25～50 degree under the JIS Shore C grade of the determination of test method of using JIS K 6301, and density is about 0.4～0.6g/cm
3, preferred about 0.42～0.57g/cm
3, and surfaceness represents with the equispaced S of the local summit of the roughness curve of JIS B 0601 (surfaceness), is about 10～30S, preferred about 15～25S.
With the bonding agent diaphragm of fitting, obtain polarized light piece in the one side at least of the polarization film of making like this.
As diaphragm, for example enumerate: contain the acetyl fibre prime system resin of triacetyl cellulose and diacetyl cellulose and so on film, contain the polyester based resin of polyethylene terephthalate or Polyethylene Naphthalate, polybutylene terephthalate and so on film, contain polycarbonate-based resin film, contain the film of cyclic olefine resin.As the thermoplasticity cyclic olefine resin of market sale, " Topas " (registered trademark) that German Ticona company sells, " ア-ト Application " (registered trademark), " ゼ オ ノ ア ", " ゼ オ ネ Star Network ス " (being registered trademark) that Japanese ゼ オ Application (strain) is sold that ジ エ イ エ ス ア-Le (strain) is sold, " ア ペ Le " (registered trademark) that Mitsui Chemicals (strain) is sold etc. are for example arranged.The film that such cyclic olefine resin is made is as diaphragm, the suitable known method such as solvent casting method, extrusion by melting of using when the system film.The cyclic olefine resin molding of making also has market sale, and " エ ス シ-Na " that ponding chemical industry (strain) sells, " SCA40 " etc. are for example arranged.
The thickness of diaphragm is preferably thin, but crosses when thin, and intensity reduces, and poor in processability on the other hand, when blocked up, takes place that the transparency reduces or in elongated etc. the problem of stacked back necessary curing time.Therefore, the suitable thickness of diaphragm for example is about about 5～200 μ m, and preferably about 10～150 μ m are more preferably about 20～100 μ m.
In order to improve the cementability of bonding agent and polarization film and/or diaphragm, also can implement surface treatments such as corona treatment, flame treatment, Cement Composite Treated by Plasma, ultraviolet ray irradiation, bottom coating processing, saponification processing to polarization film and/or diaphragm.
Also can implement surface treatments such as anti-credit optical processing, anti-reflex treated, dura mater coating processing, antistatic treatment, antifouling processing alone or in combination to diaphragm.In addition, diaphragm and/or diaphragm sealer also can have the ultraviolet light absorber of benzophenone based compound, benzotriazole based compound etc. or the plastifier of phenyl phosphate based compound, phthalate compound etc.
Such diaphragm both can be fitted in the one side of polarization film, also can be fitted on the two sides.
Polarization film and diaphragm use hydrosolvent be bonding agent, organic solvent be bonding agent, hot melt be bonding agent, solvent-free be that bonding agent such as bonding agent carries out stacked.As hydrosolvent is bonding agent, for example enumerates the polyvinyl alcohol resin aqueous solution, water system bi-component ammonia ester is an emulsion bonding agent etc.; As organic solvent is bonding agent, and for example enumerating bi-component ammonia ester is bonding agent etc.; As solvent-free be bonding agent, for example enumerating single component ammonia ester is bonding agent etc.Will with the bonding plane of polarization film through saponification processing etc. and the acetylcellulose mesentery of hydrophilicity-imparting treatment when using as diaphragm, the polyvinyl alcohol resin aqueous solution is preferably used as bonding agent.
Polyvinyl alcohol resin as the bonding agent use, except handling and the alcotex that obtains through saponification as the polyvinyl acetate of the homopolymer of vinyl acetate, also have with vinyl acetate and with it the multipolymer of other monomers of copolymerization handle and the ethenol system copolymer that obtains and then the modified polyvinylalcohol based polymer etc. that their hydroxyl carried out partly modification through saponification.In this bonding agent, also can use polyaldehyde, soluble epoxide compound, melamine based compound etc. as adjuvant.
The method of applying polarization film and diaphragm does not limit especially, for example enumerates: at the even coating adhesive in the surface of polarization film or diaphragm, overlap another film at coated face, employing roller etc. is fitted, and dry method etc.
Usually, bonding agent preparation back is coated with the scope that binding temperature is normally about about 15～30 ℃ under about 15～40 ℃ temperature.Carry out dried after the applying, remove the solvent of the water that contained in the bonding agent etc., but normally about 30～85 ℃ of the baking temperature of this moment, preferred about 40～80 ℃ scope.Then, also can bonding agent be solidified about 15～85 ℃, preferred about 20～50 ℃, more preferably from about about about 1～90 day of maintenance usually under 35～45 ℃ the temperature environment.When this curing time is long, produce rate variance, so be about about 1～30 day, preferred about 1～7 day between curing period.
So just obtain by the polarized light piece of bond layer at the one or both sides applying diaphragm of polarization film.
In the present invention, also can make diaphragm have function as phase retardation film, as brightness improve the function of film, as the function of reflectance coating, as the function of Transflective film, as the function of diffuser, as the optical functions such as function of optical compensation films.At this moment; thereby for example make it to have such function, can also give such function diaphragm self except improving optical functional films such as film, reflectance coating, Transflective film, diffuser, optical compensation films by surperficial stacked phase retardation film, brightness at diaphragm.In addition, also can as diffuser with function that brightness improves film etc., make diaphragm self have multiple function.
For example; by stretch processing that above-mentioned diaphragm is implemented in record in No. 2841377 communique of Jap.P., No. 3094113 communique of Jap.P. etc. or the processing that is implemented in middle records such as No. 3168850 communique of Jap.P., can give function as phase retardation film.In addition; by opening 2002-169025 communique or the special method formation micropore of putting down in writing in the 2003-29030 communique of opening the spy in employing on the said protection film; or, can give the function that improves film as brightness by the different cholesteric liquid crystal layers more than 2 layers of centre wavelength that overlapping selection is reflected.
By on said protection film, adopting evaporation and sputter etc. to form metallic film, can give function as reflectance coating or Transflective film.By on said protection film, being coated with the resin solution that contains particulate, can give function as diffuser.In addition, by liquid crystal compounds such as coating dish-type molecule liquid crystal compounds on said protection film and make it directed, can give function as optical compensation films.In addition, also can use suitable bonding agent on polarization film directly the brightness that waits of applying trade name: DBEF (ス リ-エ system (strain) system) improve film, trade name: the optical functional film of the market sale of the phase retardation film of film, trade name: ス ミ カ ラ イ ト (registered trademark) (Sumitomo Chemical (strain)) etc. etc. is improved at the visual angle of WV film (Fuji's description Off ィ Le system (strain) system) etc.
Embodiment
Embodiment below is shown and then specifies the present invention, but the present invention is not limited by these examples.
Embodiment 1
Polyvinyl alcohol film (Network ラ レ PVC ニ ロ Application VF-PS#7500 with thickness 75 μ m, the degree of polymerization 2400,99.9 moles of saponification degrees are more than the %) in 30 ℃ pure water, make film lax and keep under the state of tense situation dipping 130 seconds roughly, make the abundant swelling of film.
Then, while be immersed in the aqueous solution that weight ratio iodine/potassium iodide/water is 0.02/1.5/100 and carry out uniaxial tension.Then, be to carry out water-fastization processing in 60 ℃ of aqueous solution of 10/5/100 Yi Bian be immersed in weight ratio potassium iodide/boric acid/water, reach 5.9 times Yi Bian carry out uniaxial tension up to the accumulation stretching ratio that begins from reel.Again under 30 ℃, be dipping 30 seconds roughly in 20/3/100 the aqueous solution at weight ratio potassium iodide/boric acid/water, wash roughly 10 seconds with 10 ℃ pure water again.
Then, the film that will wash in the 1st dried, give the tension force of 850N/m, and meanwhile after 120 seconds, then in the 2nd dried, film is given the tension force of 670N/m on one side 80 ℃ of dryings, 85 ℃ of 180 seconds of drying, obtain polarization film on one side.
At the two sided coatings polyethenol series bonding agent of this polarization film,, make polarized light piece two sides applying diaphragm (tri acetyl cellulose membrane (thickness 80 μ m) that saponification is handled has been implemented on the surface).
The fold of film takes place to lack in the drying process, and the fracture of film does not take place.In addition, observe resulting polarized light piece under the reflection of fluorescent light, striped is few, and outward appearance is good.
Comparative example 1
Making the tension force that is applied on the film in the 1st dried is 670N/m, and making the tension force that is applied on the film in the 2nd dried is 850N/m, in addition, has made polarized light piece similarly to Example 1.
The fold of film takes place manyly in the drying process, and the fracture of film has taken place.In addition, observe resulting polarized light piece under the reflection of fluorescent light, striped is few.
Comparative example 2
Making the temperature of the 1st dried is 85 ℃, and the temperature that makes the 2nd dried is 80 ℃, in addition, has similarly made polarized light piece with comparative example 1.
The fold of film takes place manyly in the drying process, and the fracture of film has taken place.In addition, observe resulting polarized light piece under the reflection of fluorescent light, striped is many, appearance poor.
Claims (4)
1. the manufacture method of a polarization film, it is the sequential processes of the polyvinyl alcohol (PVA) mesentery being handled, washing processing and dried by swelling processing, dyeing processing, boric acid, thereby make the method for polarization film, it is characterized in that, on one side give tension force and adopt the multistage to carry out dried on one side, carry out Tension Control, so that make the wide tension force of per unit of the film in each stage of dried reach substantial constant film, and to be that the tension force of last stage is following carry out the tension force that makes after-stage
From the tension force of scope the setting last stage of 600～1500N/m, the tension force from the scope setting after-stage of 300～1200N/m, and
Making baking temperature in the after-stage is above the carrying out of baking temperature in the last stage,
From the baking temperature of 50～90 ℃ scopes setting last stages, from the baking temperature of 70～100 ℃ scopes setting after-stages,
The dried time in each stage is 60～600 seconds.
2. polarized light piece is to form at the one side at least of the polarization film that adopts the described method manufacturing of claim 1 the to form diaphragm of fitting.
3. polarized light piece according to claim 2, wherein, said protection film possesses the wantonly a kind function of phase retardation film, brightness raising film, visual angle improvement film and Transflective film.
4. optical laminates, the described polarized light piece of applying claim 3 and be selected from phase retardation film, brightness and improve film, visual angle improvement film and Transflective film at least a kind and form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005000525 | 2005-01-05 | ||
| JP2005000525A JP4581690B2 (en) | 2005-01-05 | 2005-01-05 | Manufacturing method of polarizing film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1800888A CN1800888A (en) | 2006-07-12 |
| CN100501464C true CN100501464C (en) | 2009-06-17 |
Family
ID=36796850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100036070A Active CN100501464C (en) | 2005-01-05 | 2006-01-04 | Manufacturing method of polarized light film, polarized light slice and optical laminate style |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4581690B2 (en) |
| KR (1) | KR101226364B1 (en) |
| CN (1) | CN100501464C (en) |
| TW (1) | TWI402157B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100932049B1 (en) * | 2008-08-22 | 2009-12-15 | 주식회사 에이스 디지텍 | Manufacturing method for polarizing film |
| WO2010071094A1 (en) * | 2008-12-18 | 2010-06-24 | 株式会社クラレ | Polyvinyl alcohol film |
| CN101852879B (en) * | 2009-03-30 | 2014-02-26 | 住友化学株式会社 | Process for producing a polarizing film |
| KR101341980B1 (en) * | 2011-09-29 | 2013-12-16 | 주식회사 엘지화학 | Device for Controlling a Color of Polarizing Film and Method of Controlling the Same |
| WO2013084924A1 (en) * | 2011-12-07 | 2013-06-13 | 住友化学株式会社 | Method for producing polarizing film, method for producing polarizing plate, and polarizing plate |
| JP5722255B2 (en) * | 2012-02-28 | 2015-05-20 | 住友化学株式会社 | Manufacturing method of polarizing plate |
| JP6462199B2 (en) * | 2012-12-04 | 2019-01-30 | 住友化学株式会社 | Manufacturing method of polarizing film and polarizing plate |
| JP2016071349A (en) * | 2014-09-30 | 2016-05-09 | 住友化学株式会社 | Production method of polarizing laminate film and polarizing plate |
| KR20160088064A (en) * | 2015-01-15 | 2016-07-25 | 동우 화인켐 주식회사 | Polarizing plate and image display device comprising the same |
| JP5996714B2 (en) * | 2015-05-01 | 2016-09-21 | 住友化学株式会社 | Manufacturing method of resin plate or film with protective film |
| CN107850718B (en) | 2015-09-30 | 2021-01-12 | 三菱化学株式会社 | Method for producing polarizing film, and polarizing plate |
| JP7058230B2 (en) * | 2018-04-09 | 2022-04-21 | 日東電工株式会社 | How to manufacture a extruder |
| JP7058231B2 (en) * | 2018-04-09 | 2022-04-21 | 日東電工株式会社 | How to manufacture a extruder |
| JP7316197B2 (en) * | 2019-11-19 | 2023-07-27 | 日東電工株式会社 | POLARIZING FILM MANUFACTURING METHOD, POLARIZING FILM MANUFACTURING DEVICE AND CONTROL SYSTEM |
| CN112248611B (en) * | 2020-10-12 | 2022-10-04 | 深圳市盛波光电科技有限公司 | Preparation method of polaroid |
Family Cites Families (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 |
| JP2001174634A (en) * | 1999-12-15 | 2001-06-29 | Sumitomo Chem Co Ltd | Method of producing polarizing film |
| JP4001336B2 (en) * | 2002-11-07 | 2007-10-31 | 日東電工株式会社 | Method for producing coated sheet |
-
2005
- 2005-01-05 JP JP2005000525A patent/JP4581690B2/en active Active
- 2005-12-06 TW TW094143029A patent/TWI402157B/en active
-
2006
- 2006-01-03 KR KR1020060000546A patent/KR101226364B1/en active IP Right Grant
- 2006-01-04 CN CNB2006100036070A patent/CN100501464C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP4581690B2 (en) | 2010-11-17 |
| TWI402157B (en) | 2013-07-21 |
| KR20060080541A (en) | 2006-07-10 |
| KR101226364B1 (en) | 2013-01-24 |
| JP2006189560A (en) | 2006-07-20 |
| CN1800888A (en) | 2006-07-12 |
| TW200631768A (en) | 2006-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100501464C (en) | Manufacturing method of polarized light film, polarized light slice and optical laminate style | |
| CN1800881B (en) | Manufacturing method of polarized light film, polarized light slice and optical laminate style | |
| KR101638196B1 (en) | Process for producing a polarizing film | |
| CN101519502B (en) | Method for manufacturing polarizing film, polarizing sheet and optical laminate | |
| CN101387718A (en) | Polarization film and method for producing the same and method for producing polarizer | |
| CN100388023C (en) | Polarization film and its manufacturing method, polarization sheet and optical laminating body | |
| JP4602777B2 (en) | Method for producing polyvinyl alcohol film | |
| CN100410696C (en) | Manufacturing method of polaroid, polarizer and optical laminate thereof | |
| CN100397110C (en) | Polarization membrane and manufacturing method thereof,polarizer and optical laminate | |
| CN101498808B (en) | Method for manufacturing polaroid sheet | |
| CN100399071C (en) | Polarization film mfg. method, polarization sheet mfg. method and optical laminate mfg. method | |
| CN100409044C (en) | Manufacturing method of polarized film, and polarized sheets and optical laminates | |
| JP2009237124A (en) | Method of manufacturing polarizing film and its use | |
| WO2017104634A1 (en) | Production device and production method for polarizing film, and polarizing film | |
| CN100437162C (en) | Iodine polarizing film manufacturing method, polaroid manufacturing method and optical laminate manufacturing method | |
| CN100388024C (en) | Polarized film, polarized sheet and method for producing optical laminate | |
| JP4483328B2 (en) | Manufacturing method of polarizing film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |