CN100460900C - Method for making polarizing lens - Google Patents
Method for making polarizing lens Download PDFInfo
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- CN100460900C CN100460900C CNB2005101270812A CN200510127081A CN100460900C CN 100460900 C CN100460900 C CN 100460900C CN B2005101270812 A CNB2005101270812 A CN B2005101270812A CN 200510127081 A CN200510127081 A CN 200510127081A CN 100460900 C CN100460900 C CN 100460900C
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Abstract
The invention is a polarizer making method, firstly providing PVA film; dipping the PVA film in dyeing liquor for dip-dye treatment; dipping the dyed PVA film in cross-linking solution and simultaneously, unidirectionally extending the PVA film, where the cross-linking solution comprises dicarboxylic acid and boric acid; laminating the extended PVA film and the TAC film saponified by alkali through catalyst water solution, where the catalyst solution comprises protonic acids and melt salts.
Description
Technical field
The present invention relates to a kind of method for making of polaroid, particularly about a kind of method for making that is used for the polaroid of LCD.
Background technology
As known in the art, in LCD, polaroid is one of indispensable formation device, its purposes is not have the light of polarizability originally, to produce polarization, to be transformed into polarized light, therefore, LCD just can be utilized this polarized light, adds the torque characteristic of liquid crystal molecule itself, reaches whether passing through of light of control and presenting of color signal.And in recent years, along with liquid crystal display device is widely used in such as in the various electronic equipments such as word processor (word processor), computer screen, mobile phone or LCD TV, the demand of polaroid is also increasing.
The cross-section structure of existing polaroid 10 as shown in Figure 1; it consists predominantly of fractal film 12, pressure sensing adhesive layer 14, polyvinyl alcohol (PVA) (polyvinyl alcohol; be designated hereinafter simply as PVA) polarization matrix layer 18, Triafol T (triacetyl cellulose; be designated hereinafter simply as TAC) support membrane 16 and 20, and diaphragm 22.Sometimes, in order to prevent reflex, the light polarizing film surface also can give special processing again, for example adds anti-(anti-glare) layer or antireflection (anti-reflection) layer of dazzling of last layer.At present, the polaroid on the market is a main flow with the iodine polarizing sheet still, and this is because the iodine polarizing sheet has high light peneration, high contrast, and has the polarized light property of wider regional wavelength, and its manufacturing is upward more or less freely, relatively also makes its price comparatively cheap.
The method that prior art is made the iodine polarizing sheet is: earlier with the soaked expansion (swelling) of polyvinyl alcohol (PVA) (PVA) raw material process; soak iodine staining (dyeing); extend pre-treatment steps such as (re-stretching) again; form after the aforementioned PVA polarization matrix layer 18 with polarized light property; what re-use the special allotment of process contains PVA hydrogel (hydrogel) with on the PVA polarization matrix layer 18; following two sides and the TAC support membrane 16 and 20 laminated (lamination) that saponification was handled through alkali lye (NaOH or potassium hydroxide); after super-dry, on TAC support membrane 16 and 20, paste again with fractal film and diaphragm etc.
Yet, the special allotment of aforementioned process contain the PVA hydrogel, its preparation process extremely bothers, need elder generation that the high-molecular polyvinyl alcohol powder of optical grade is added in the entry, be heated to 80 ℃ to 90 ℃ high-temperature digestion again, and need continue stirring until and be colloidal, just cool off at last and filter, whole preparation process needs consuming time more than 3 to 4 hours at least.And except preparing time-consuming shortcoming, the existing PVA of containing hydrogel needs to finish using in 1 to 2 day after preparation is finished usually, and when preserving, especially need significant care, because its colloid property is also unstable, if when cloth glue, lump in the colloid (aggregation) or separated out impurity such as particle, promptly can cause the acceptance rate of product line to descend.
In addition, owing to there is increasing LCD to be used in such as aspects such as large-scale outdoor display billboard, vehicle, aircraft, autical instrument and satellites, therefore the user is to temperature tolerance and requirement characteristic such as moisture-proof on the also increasingly stringent of polaroid in environment, and the iodine polarizing sheet of aforementioned conventional owing to before be adsorbed in the PVA polarization matrix layer content of iodine and active easily in time and the influence of environment decay, it is not enough that its temperature tolerance and moisture-proof are all disliked, thereby be restricted to the scope of its application.
Summary of the invention
Therefore, fundamental purpose of the present invention provides a kind of method for making of polaroid of improvement, to solve above-mentioned prior art problems.
According to a preferred embodiment of the invention, the invention provides a kind of method for making of polaroid, include: polyvinyl alcohol (PVA) (PVA) film is provided; This PVA film is immersed in the staining solution, carries out dip dyeing treatment; PVA film after this dyeing is immersed in the cross-linking agent solution, this PVA film of unidirectional extension simultaneously, wherein said cross-linking agent solution includes dicarboxylic acids and boric acid; And the PVA film after will extending is by aqueous catalyst solution and Triafol T (TAC) frlml laminating of handling through the highly basic saponification, and wherein this aqueous catalyst solution includes Bronsted acid and slaine.
In order to more clearly understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing.Using with aid illustration yet accompanying drawing is only for reference, is not to be used for the present invention is limited.
Description of drawings
What Fig. 1 illustrated is the cross-section structure of existing polaroid.
What Fig. 2 illustrated is the manufacturing process synoptic diagram that the present invention makes polaroid.
What Fig. 3 illustrated is the structural formula of hexane diacid.
What Fig. 4 illustrated is through the PVA membrane superficial tissue synoptic diagram after step 106 processing.
Fig. 5 utilizes preferred embodiment and four TAC-PVA-TAC tunic samples that the comparative example made comes out, the comparison sheet as a result of the moisture-resistant heat resistanceheat resistant test experiments that is immersed in the hot bath to be carried out.
Main description of reference numerals
10 polaroids, 12 fractal films
14 pressure sensing adhesive layer, 16 TAC support membranes
18 PVA polarization matrix layers, 20 TAC support membrane
22 diaphragms 50 do not extend the PVA film
52 pure water, 53 PVA films
54 Biodines, the 55 PVA films of filling a prescription
56 crosslinking chemicals, the 57 PVA films of filling a prescription
58 PVA films, 59 TAC films
60 TAC film-PVA film-TAC film
70 aqueous catalyst solutions
572 water wettability hydroxyls, 574 chemical bonded refractory structures
576 anti-water-bound 578 iodine
Embodiment
As previously mentioned, in the pre-treatment processing procedure of traditional polaroid, be after earlier Triafol T (TAC) film being handled through highly basic (NaOH or potassium hydroxide) saponification, make TAC film surface possess hydrophilic property, and then TAC film and process are contaminated polyvinyl alcohol (PVA) (PVA) frlml laminating that stretched with the prepared hydrogel adhesive of PVA polymeric powder.
Above-mentioned with the prepared hydrogel of PVA polymeric powder (hydrogel) bonding agent except preparation process is tediously long, the cohesive force that it provided also remains to be improved.
For this reason, the invention provides a kind of method for making of LCD light polarizing film of improvement, preferable bonding effect can be provided, can simplify the polaroid processing procedure simultaneously, and improve productive capacity and acceptance rate.
See also Fig. 2, what it illustrated is the manufacturing process synoptic diagram that the present invention makes polaroid.The manufacturing process that the present invention makes polaroid does not need to use in the prior art with the prepared hydrogel adhesive of PVA polymeric powder.As shown in Figure 2, the manufacturing process that the present invention makes polaroid roughly is divided into several key steps, comprising:
Step 102: soaked expansion (swelling).
Step 104: contaminate (dyeing).
Step 106: extend (stretching).
Step 108: dry (drying).
Step 110: laminated (lamination).
Step 112: dry (drying).
The present invention is from step 102, and (un-stretched) PVA film 50 that will not extend earlier is immersed in the pure water 52.Carry out step 104 immediately through the PVA film 53 after the soaked expansion process, in Biodine prescription 54, soak, make PVA film 53 absorption iodine.Biodine prescription 54 includes molecular iodine (iodine) and potassium iodide (potassium iodide), and wherein the weight percent concentration of iodine is about about 0.01wt.% to 0.5wt.%.
Carry out step 106 immediately, the extension of PVA film just (stretching) processing procedure through the PVA film 55 that dip dyeing treatment is crossed.PVA film 55 carries out the unidirectional extension (uniaxially stretching) of film in the crosslinking chemical prescription 56 that contains boric acid (boric acid) and potassium iodide.Wherein, the weight percent concentration of boric acid is about about 1wt.% to 10wt.%.
According to a preferred embodiment of the invention, the breaking elongation of PVA film (total stretching ratio) is about between 4 times to 7 times.In addition, the present invention is characterized in to be added with in addition in the crosslinking chemical prescription 56 dicarboxylic acids (dicarboxylic acid), for example hexane diacid (adipic acid; HOOCC
4H
8COOH), glutaric acid (glutaric acid) or succinic acid (succinic acid), wherein be again preferred with the hexane diacid.The structure of hexane diacid as shown in Figure 3.
The invention is characterized in when carrying out the extension processing procedure of PVA film, be added in the solution formula 56 dicarboxylic acids can with PVA film bond.According to the present invention, the weight percent concentration of dicarboxylic acids is about about 1wt.% to 5wt.%.
Please consult Fig. 4 simultaneously, what it illustrated is the surface structure synoptic diagram of the PVA film 57 after handling through step 106.To add hexane diacid is example, and what carboxyl in the hexane diacid molecule of carboxyl (carboxyl group) was all arranged at the strand two ends with the water wettability hydroxyl 572 on PVA film surface esterifications (esterification) takes place for a moment, produces chemical bonded refractory structure 574.
In addition, the boric acid in crosslinking chemical prescription 56 also can with the surface reaction of PVA film, form anti-water-bound 576, can avoid being adsorbed on the iodine 578 on PVA film 57 surfaces to external diffusion.
Then, carry out the drying steps (dried before PVA is laminated) of step 108, keep dry before making PVA film 57 and aqueous catalyst solution 70 contacting.
Then, carry out step 110, make the PVA film of handling through step 108 58 with laminated, form trilamellar membrane (TAC-PVA-TAC) laminate structures through the pretreated TAC film 59 of highly basic saponification by adding aqueous catalyst solution 70.At this moment, because original bond is at another unreacted carboxyl of PVA film 57 lip-deep hexane diacid molecules, catalysis by the aqueous catalyst solution 70 that in laminated process, adds, and with the hydroxyl on TAC film 59 surfaces esterification fast takes place, produce the chemical bonded refractory structure, make that so PVA film 58 can be closely laminated with TAC film 59.
In addition, in laminated step 110 process, aqueous catalyst solution 70 is contacted with the PVA film, the mode that is adopted is to provide aqueous catalyst solution with the method for dripping solution, but not carries out with coating method.
The composition of aqueous catalyst solution 70 includes strong protonic acid, example hydrochloric acid, sulfuric acid or nitric acid, and slaine.Slaine can include the inorganic salts of any form that contains zinc ion or magnesium ion, and villaumite for example is as zinc chloride (ZnCl
2) or magnesium chloride (MgCl
2) etc., perhaps can be bromine salt, for example zinc bromide (ZnBr
2), or can be salt compounded of iodine, for example zinc iodide (ZnI
2), wherein preferable with the effect of zinc chloride gained again.According to the present invention, the weight percent concentration of slaine is about about 1wt.% to 5wt.%, and the concentration of Bronsted acid is about about 0.1M to 0.5M.
Zinc chloride belongs to a kind of lewis acid (Lewis acid), and this slaine often is taken as catalyzer and uses in different field.
In addition, in order to accelerate subsequent drying speed, in aqueous catalyst solution 70, also can add high-volatile hydrophilic solvent, for example methyl alcohol.
At last, carry out step 112, laminated TAC film-PVA film-TAC film 60 is imposed 50～80 ℃ of dried.Because the methyl alcohol that is added in the aqueous catalyst solution 70 makes it can quicken to finish oven dry.
In addition, in order to increase the functional of polaroid, the TAC film for example carry out can being coated with earlier before saponification is handled liquid crystal layer, protective seam, anti-ly dazzle layer, anti-reflecting layer or scratch resistance hinder antifouling processing layer or the like.By the combination of different functional TAC films, the Polarizer that can obtain having the different optical effect.
Be engaged in those skilled in the art and more can understand spirit of the present invention, technical characterictic and advantage place for making, below, other proposes a preferred embodiment and four comparative examples.Preferred embodiment uses the aforementioned aqueous catalyst solution that does not contain PVA when laminated step, and adds hexane diacid in the crosslinking chemical in extending step; In four comparative examples, at PVA film and the fashionable bonding agent that adopts of TAC rete is respectively colloidal adhesive (comparative example one) and the three kinds of hydrogels that contain PVA that do not contain PVA, and four comparative examples all use the crosslinking chemical that does not add hexane diacid in PVA film extension step.
Preferred embodiment:
Prepare aqueous catalyst solution in advance, its composition comprises hydrochloric acid solution, zinc chloride and methyl alcohol, and the purpose of wherein adding methyl alcohol is to reach the effect of quickening oven dry, and inessential major component.To be added on through the hexane diacid of weighing earlier as the aforementioned in the cross-linking agent solution, and be dissolved, will in the cross-linking agent solution of this interpolation hexane diacid, extend processing through the PVA film of contaminating with aforesaid a succession of program then.Then, in aforesaid laminated step, PVA film and TAC rete are closed the aqueous catalyst solution for preparing in advance, form the TAC-PVA-TAC tunic in the drippage mode.As previously mentioned, be added on hexane diacid and the reaction of the composition in the follow-up aqueous catalyst solution that touches in the cross-linking agent solution, can obtain desired bonding characteristic.
Comparative example one:
Preparation does not contain the colloidal adhesive of PVA.In hot water, add hexane diacid earlier, and then add glyoxal (glyoxal), zinc chloride and hydrochloric acid through weighing.Through after the careful stirring in about ten minutes, can obtain the colloidal solution of achromaticity and clarification.The colloidal adhesive for preparing closes in the step with the TAC rete and uses formation TAC-PVA-TAC tunic contaminating, extend (not adding hexane diacid in the cross-linking agent solution), dried PVA film with traditional program subsequently.
Comparative example two:
Will be in hot water through the PVA powder dissolution of weighing, heating, and in addition violent stirring are to avoid caking (aggregation) or to separate out particle.Afterwards, when stirring, above-mentioned solution is cooled to room temperature.Then, add pure water, the moisture so that compensation loses because of heating filters above-mentioned solution again, with the caking composition in the filtering solution, produces weight percent concentration and is about 5% PVA hydrogel.The time for preparing above-mentioned PVA hydrogel was about about a few hours.The 5%PVA hydrogel for preparing uses closing in the step with traditional program dip-dye, extension, dried PVA film and TAC rete subsequently, forms the TAC-PVA-TAC trilamellar membrane.
Comparative example three:
Will be in hot water through the PVA powder dissolution of weighing, heating, and in addition violent stirring are to avoid caking.Afterwards, when stirring, above-mentioned solution is cooled to room temperature, and in stirring and cooling procedure, adds boric acid and zinc chloride again.Then, add pure water, the moisture so that compensation loses because of heating filters above-mentioned solution again, with the caking composition in the filtering solution, produces weight percent concentration and is about 5% PVA hydrogel.The time for preparing above-mentioned PVA hydrogel was about about a few hours.The 5%PVA hydrogel for preparing uses closing in the step with traditional program dip-dye, extension, dried PVA film and TAC rete subsequently, forms the TAC-PVA-TAC trilamellar membrane.
Comparative example four:
Will be in hot water through the PVA powder dissolution of weighing, heating, and in addition violent stirring are to avoid caking.Afterwards, when stirring, above-mentioned solution is cooled to room temperature, and in stirring and cooling procedure, adds hydrochloric acid, glyoxal and zinc chloride again.Then, add pure water, the moisture so that compensation loses because of heating filters above-mentioned solution again, with the caking composition in the filtering solution, produces weight percent concentration and is about 5% PVA hydrogel.The time for preparing above-mentioned PVA hydrogel was about about a few hours.The 5%PVA hydrogel for preparing uses closing in the step with traditional program dip-dye, extension, dried PVA film and TAC rete subsequently, forms the TAC-PVA-TAC trilamellar membrane.
The comparison of moisture-resistant heat resistanceheat resistant power of test:
See also Fig. 5, it is to utilize above preferred embodiment and four TAC-PVA-TAC tunic samples that the comparative example made comes out, the comparison sheet as a result of the moisture-resistant heat resistanceheat resistant test experiments that is immersed in the hot bath to be carried out.Wherein, utilize TAC-PVA-TAC tunic that preferred embodiment and comparative example one produced in temperature is 70 ℃ hot bath, to experimentize, remaining comparative example then is to experimentize in temperature is 50 ℃ hot bath, observes its thin layer and peels off required consumed time.And by the experimental result of Fig. 5 moisture-resistant heat resistance obviously preferable (〉 3 days of the preferred embodiment of the present invention as can be seen).
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of doing according to claims of the present invention all should belong to covering scope of the present invention.
Claims (18)
1. the method for making of a polaroid includes:
Polyvinyl alcohol film is provided;
This polyvinyl alcohol film is immersed in the staining solution, carries out dip dyeing treatment;
Polyvinyl alcohol film after this dyeing is immersed in the cross-linking agent solution, this polyvinyl alcohol film of unidirectional extension simultaneously, wherein said cross-linking agent solution includes dicarboxylic acids and boric acid, in this step, and the carboxyl of this dicarboxylic acids and the hydroxyl generation esterification on polyvinyl alcohol film surface; And
With this polyvinyl alcohol film after extending, laminated with the cellulose triacetate film that the mode and the saponification of process highly basic of interpolation aqueous catalyst solution were handled, wherein said aqueous catalyst solution includes slaine and strong protonic acid, in this step, another the unreacted carboxyl that has been connected to lip-deep this dicarboxylic acids of polyvinyl alcohol film under the catalysis of this aqueous catalyst solution with the hydroxyl generation esterification on cellulose triacetate film surface.
2. the method for making of polaroid as claimed in claim 1, wherein said staining solution includes iodine.
3. the method for making of polaroid as claimed in claim 1, wherein said staining solution includes potassium iodide.
4. the method for making of polaroid as claimed in claim 1, wherein said cross-linking agent solution also includes potassium iodide.
5. the method for making of polaroid as claimed in claim 1, wherein said dicarboxylic acids includes hexane diacid, glutaric acid or succinic acid.
6. the method for making of polaroid as claimed in claim 1, wherein said slaine includes the inorganic salts of any form that contains zinc ion or magnesium ion.
7. the method for making of polaroid as claimed in claim 1, wherein said strong protonic acid includes hydrochloric acid, sulfuric acid or nitric acid.
8. the method for making of polaroid as claimed in claim 1, wherein said aqueous catalyst solution are added in addition and are had volatile hydrophilic solvent.
9. the method for making of polaroid as claimed in claim 8, wherein said to have volatile hydrophilic solvent be methyl alcohol.
10. the method for making of a polaroid includes:
Polyvinyl alcohol film is provided;
This polyvinyl alcohol film is immersed in the staining solution, carries out dip dyeing treatment;
Polyvinyl alcohol film after this dyeing is immersed in the cross-linking agent solution, this polyvinyl alcohol film of unidirectional extension simultaneously, wherein said cross-linking agent solution includes dicarboxylic acids and boric acid, in this step, and the carboxyl of this dicarboxylic acids and the hydroxyl generation esterification on polyvinyl alcohol film surface; And
With the polyvinyl alcohol film after this extension, laminated with the cellulose triacetate film that the mode and the saponification of process highly basic of interpolation aqueous catalyst solution were handled, wherein said catalyst solution includes at least a lewis acid and at least a strong protonic acid, in this step, another the unreacted carboxyl that has been connected to lip-deep this dicarboxylic acids of polyvinyl alcohol film under the catalysis of this aqueous catalyst solution with the hydroxyl generation esterification on cellulose triacetate film surface.
11. the method for making of polaroid as claimed in claim 10, wherein said staining solution includes iodine.
12. the method for making of polaroid as claimed in claim 10, wherein said staining solution includes potassium iodide.
13. the method for making of polaroid as claimed in claim 10, wherein said cross-linking agent solution also includes potassium iodide.
14. the method for making of polaroid as claimed in claim 10, wherein said dicarboxylic acids are hexane diacid.
15. the method for making of polaroid as claimed in claim 10, wherein said lewis acid are zinc chloride.
16. the method for making of polaroid as claimed in claim 10, wherein this strong protonic acid is a hydrochloric acid.
17. adding in addition, the method for making of polaroid as claimed in claim 10, wherein said aqueous catalyst solution have volatile hydrophilic solvent.
18. the method for making of polaroid as claimed in claim 17, wherein said to have volatile hydrophilic solvent be methyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101270812A CN100460900C (en) | 2005-11-30 | 2005-11-30 | Method for making polarizing lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101270812A CN100460900C (en) | 2005-11-30 | 2005-11-30 | Method for making polarizing lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1979231A CN1979231A (en) | 2007-06-13 |
| CN100460900C true CN100460900C (en) | 2009-02-11 |
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ID=38130461
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| CNB2005101270812A Expired - Fee Related CN100460900C (en) | 2005-11-30 | 2005-11-30 | Method for making polarizing lens |
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Families Citing this family (13)
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| US8243426B2 (en) | 2008-12-31 | 2012-08-14 | Apple Inc. | Reducing optical effects in a display |
| CN102108270A (en) * | 2010-12-23 | 2011-06-29 | 深圳市盛波光电科技有限公司 | Polyvinyl alcohol film and triacetate fiber resin film bonding glue for polarizer |
| CN102368127A (en) * | 2011-07-13 | 2012-03-07 | 惠州市睿立宝莱光电科技有限公司 | Liquid crystal light valve for converting signal light into bidirectional circularly polarized light stereoscopic imaging |
| US20130045390A1 (en) | 2011-08-16 | 2013-02-21 | Rui Xu | Base Film of Modified Polyvinyl Alcohol and Its Preparation Method and Polarizer |
| CN102432899A (en) * | 2011-08-16 | 2012-05-02 | 深圳市华星光电技术有限公司 | Modified polyvinylalcohol (PVA) base film, preparation method thereof and polarizer |
| US9176536B2 (en) | 2011-09-30 | 2015-11-03 | Apple, Inc. | Wireless display for electronic devices |
| US9810942B2 (en) | 2012-06-15 | 2017-11-07 | Apple Inc. | Quantum dot-enhanced display having dichroic filter |
| CN103472520B (en) * | 2013-08-30 | 2016-02-17 | 佛山纬达光电材料有限公司 | A kind of high temperature resistant iodine polarizing slice processing method |
| US10114159B2 (en) | 2015-01-27 | 2018-10-30 | Lg Chem, Ltd. | Method for manufacturing polarizer and polarizer manufactured by the same |
| KR101746283B1 (en) * | 2015-01-27 | 2017-06-12 | 주식회사 엘지화학 | Method for manufacturing polarizer and polarizer manufactured by the same |
| CN105866876B (en) * | 2016-06-14 | 2018-03-16 | 京东方科技集团股份有限公司 | A kind of preparation method of polarizing layer, display base plate component, display panel |
| CN107012699B (en) * | 2017-03-03 | 2020-05-22 | 厦门祥福兴胶粘制品有限公司 | Manufacturing method of anti-blue-light polaroid |
| KR102246299B1 (en) * | 2019-03-12 | 2021-04-29 | 주식회사 온빛 | The manufacturing method of high-refraction polarizing lens |
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| CN1979231A (en) | 2007-06-13 |
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