CN102736157A - Manufacturing method of polarized plate - Google Patents
Manufacturing method of polarized plate Download PDFInfo
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- CN102736157A CN102736157A CN2012100777919A CN201210077791A CN102736157A CN 102736157 A CN102736157 A CN 102736157A CN 2012100777919 A CN2012100777919 A CN 2012100777919A CN 201210077791 A CN201210077791 A CN 201210077791A CN 102736157 A CN102736157 A CN 102736157A
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- transparent resin
- ultraviolet
- resin film
- film
- tackifier
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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
- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a method. The method is applied for making a polarized plate (5) by first forming a laminated body (4) by making transparent resin films (2, 3) attached on a polarized film (1) formed by poval resin through ultraviolet-cured type adhesive and then curing the adhesive by irradiating ultraviolet rays emitted from an ultraviolet ray irradiation device (16). A wavelength filter (18) which is equipped between the ultraviolet ray irradiation device (16) and the laminated body (4) and capable of optically blocking rays of wavelengths more than 400 nms basically blocks rays with more than 400-nm wavelengths. Thus only ultraviolet rays with wavelength lower than 400 nms are irradiated to the laminated body (4) to cure the adhesive. The method provided in the invention can prevent heats spots from being easily present on the polarized plate.
Description
Technical field
The present invention relates to make the method for polarization plates, this polarization plates can be used as one of optics that constitutes liquid crystal indicator.
Background technology
In recent years, consumes electric power is little, work under low-voltage, lightweight and slim liquid crystal indicator, popularizes rapidly with display device with information such as monitor and TVs as mobile phone, portable information terminal, computing machine.
Polarization plates as the use of one of optics that constitutes liquid crystal indicator; Have the one side at least of the light polarizing film of the polyvinyl alcohol resin formation that is orientated at absorption dichromatism pigment, the formation that common two sides is fitted with transparent resin film; Be pasted on liquid crystal cells by adhesive phase, use as liquid crystal panel.The transparent resin film of fitting in the one side of light polarizing film; Function with so-called diaphragm of conduct of the light polarizing film that protection forms by polyvinyl alcohol resin; But under the situation of the two sides of light polarizing film applying transparent resin film; The opposing party's transparent resin film, except function as simple diaphragm, more than have optical compensation with liquid crystal cells, a liquid crystal indicator the visual angle be improved to the function as so-called optical compensation films of purpose.
In the applying of light polarizing film and transparent resin film; Used so far with polyvinyl alcohol resin to the WS of major component as tackifier; But there is restriction in the tackifier of this water solution system on the resin molding that can use, and for dry solidification, needs the corresponding time.In addition, in recent years, required diversified transparent resin film to fit in light polarizing film as diaphragm and as optical compensation films.Therefore and since have can be applied to various transparent resin films, set time short, objectionable impurities such as is not dispersed at advantage in atmosphere, therefore proposed to use the motion of ultraviolet hardening tackifier.For example; Following technology is disclosed among the JP2004-245925-A: use the tackifier that forms as the composition of major component by with the epoxy compound that do not contain aromatic rings; Make transparent resin film (being called " diaphragm " in the document) be overlapped in light polarizing film; The active energy ray that is typical example with the ultraviolet ray to its irradiation makes adhesive solidification, processes polarization plates.
But; The polarization plates of use the ultraviolet hardening tackifier like this, its irradiation ultraviolet radiation being made; There is following problem:, produce the small distortion that is called " hot spot ", the outward appearance of infringement polarization plates at the transparent resin face of irradiation ultraviolet radiation through the heat that produces from ultraviolet lamp.About such hot spot, for example in the light time of the surface reflection fluorescent light that makes polarization plates, if there is not the polarization plates of hot spot, the mapping of the picture former state of fluorescent light ground, and, observe this spot (concavo-convex) as a plurality of tiny white points for the polarization plates that has produced hot spot.Be applied to liquid crystal indicator if will produce the polarization plates of hot spot, in images displayed, also produce same white point.Therefore, hope to make the polarization plates that hot spot does not take place.
Following method is disclosed among the JP2009-134190-A: through light polarizing film and transparent resin film are carried with strip respectively continuously; After by tackifier transparent resin film being fitted in this light polarizing film; The limit makes the duplexer that obtains and forms circular-arc convex surface driving fit along its throughput direction; Typically with the roller driving fit, the limit makes the tackifier polymerizing curable, thereby makes polarization plates.And, as the instance of the representative of tackifier, can enumerate the ultraviolet hardening tackifier, in its paragraph 0021, put down in writing above-mentioned roller is played a role as the chill roll that surface temperature is set at 20～25 ℃.If adopt limit like this driving fit to carry out the method for ultraviolet irradiation in the chill roll limit, can expect that then the above-mentioned hot spot that takes place in the polarization plates of having used the ultraviolet hardening tackifier easily also is able to suppress.But, even the method for employing and chill roll driving fit, because the difference of the transporting velocity of ultraviolet irradiation intensity, polarization plates still produces hot spot sometimes.
Therefore; Problem of the present invention is; Develop, be provided at the method that is difficult to produce hot spot in the polarization plates, it is for fitting in transparent resin film light polarizing film, make the ultraviolet hardening adhesive solidification make the method for polarization plates to its irradiation ultraviolet radiation by the ultraviolet hardening tackifier.
Further investigate repeatedly in order to solve this problem; The result finds: make fit in the ultraviolet ray of the duplexer irradiation of light polarizing film by the ultraviolet hardening tackifier and with transparent resin film; For the ultraviolet ray that only contains the wavelength below the 400nm basically is effectively, thereby accomplished the present invention.
Summary of the invention
That is, the present invention comprises following content.
[1] method of manufacturing polarization plates; It comprises by the ultraviolet hardening tackifier and transparent resin film is fitted in the light polarizing film that is formed by polyvinyl alcohol resin; Make said adhesive solidification to its irradiation ultraviolet radiation, the curing of said tackifier is carried out through the ultraviolet ray that irradiation only contains the wavelength below the 400nm basically.
[2] like [1] described method; Wherein, Basically only containing the ultraviolet ray of the wavelength below the 400nm, is to make ultraviolet ray that the wave filter of the light that sent by the ultraviolet lamp light through can blocking the wavelength more than the 400nm obtains, that the light of the wavelength more than the 400nm is blocked basically.
[3], wherein, respectively by said ultraviolet hardening tackifier applying transparent resin film, carry out said ultraviolet irradiation from a side transparent resin film side on the two sides of light polarizing film like [1] or [2] described method.
[4] like each described method in [1]～[3]; Wherein, Carry the light polarizing film of strip and the transparent resin film of strip respectively continuously; By said ultraviolet hardening tackifier said transparent resin film is fitted in this light polarizing film, the duplexer that obtains is wound up into has with the outer peripheral face of the roller of the axle of its throughput direction quadrature and make its driving fit, carry out said ultraviolet irradiation from a side opposite of the said duplexer of the duplexer that obtains with said roller.
[5] like [4] described method; Wherein, Carry the light polarizing film of strip and the transparent resin film of 2 strips respectively continuously; Respectively said transparent resin film is fitted in the two sides of light polarizing film by said ultraviolet hardening tackifier, the duplexer that obtains is wound up into the outer peripheral face of said roller and makes its driving fit, carry out said ultraviolet irradiation from the transparent resin film side of the side opposite of said duplexer with said roller.
According to the present invention; Under the situation that adopts following method; Can make the polarization plates that is inhibited of hot spot, said method is employing ultraviolet hardening tackifier, its irradiation ultraviolet radiation is made it solidify, make thus the bonding method of light polarizing film and transparent resin film.
Description of drawings
Fig. 1 is the summary side elevation of an example of manufacturing installation of the polarization plates of the expression method that is fit to embodiment of the present invention.
Fig. 2 is the luminescent spectrum (curve A) of the metal halide lamp that uses as ultraviolet light source among the embodiment that states after being illustrated in, is used for the coordinate diagram of Optical transmission spectrum (curve B) of wavelength filter of the blocking-up of the above light of wavelength 400nm equally.
Among the figure:
1 ... Light polarizing film, 2 ... First transparent resin film, 3 ... Second transparent resin film, 4 ... Duplexer before solidifying; 5 ... Polarization plates, 11 ... First coating machine, 12 ... The gravure roll that first coating machine has, 13 ... Second coating machine; 14 ... The gravure roll that second coating machine has, 16 ... Ultraviolet lamp, 18 ... Wavelength filter, 21,22 ... Fit and use niproll; 23 ... Contact (chill roll), 24 ... Carry and use deflector roll, 25,26 ... Batch front nip rollers, 28 ... Deflector roll; 30 ... The goods roller, A ... The luminescent spectrum of metal halide lamp, B ... The Optical transmission spectrum of wave filter.
Embodiment
With reference to Fig. 1, in the present invention, transparent resin film 2,3 is fitted in light polarizing film 1 by the ultraviolet hardening tackifier, process duplexer 4, to these duplexer 4 irradiation ultraviolet radiations, make above-mentioned adhesive solidification from ultraviolet lamp 16, make polarization plates 5.
In the applying of light polarizing film 1 and transparent resin film 2,3, use and fit with niproll 21,22.Transparent resin film 2,3 can fit in the one side of light polarizing film 1, also can fit in the two sides of light polarizing film 1, but preferably as diagram, fits in the two sides of light polarizing film 1.In illustrated instance, with duplexer 4 driving fits after fitting in the contact 23 that has convex surface along its throughput direction, from ultraviolet lamp 16 irradiation ultraviolet radiations of clamping duplexer 4 in its opposition side configuration.Contact 23 preferably is made up of roller as diagram.The polarization plates of making 5 is batched goods roller 30 through carrying with deflector roll 24 and batching front nip rollers 25,26.At the face that does not have coating binder separately of one side, first transparent resin film 2 and second transparent resin film 3 of light polarizing film 1, the deflector roll 28,28 of carrying usefulness is set suitably.Straight arrows among the figure is meant the flow direction of film, and curve arrow is meant the sense of rotation of roller.
In addition, the ultraviolet ray to duplexer 4 irradiations only contains the wavelength below the 400nm basically.In illustrated instance; In the luminous side of ultraviolet lamp 16 between ultraviolet lamp 16 and duplexer 4; Configuration can be blocked the light wavelength wave filter 18 of the above wavelength of 400nm; Make the light that sends from ultraviolet lamp 16 pass through this wavelength filter 18, block the light of the above wavelength of 400nm basically, the mode that shines duplexer 4 according to the ultraviolet ray that in fact only contains the wavelength below the 400nm constitutes.
In ultraviolet lamp 16; Of the back; Use mercury lamp, metal halide lamp etc. as light source, though this general ultraviolet light source contains the ultraviolet ray below the wavelength 400nm more, its wavelength region may distributes from the ultraviolet territory to visible field width amplitude ground; Present white and even purple during therefore, with this light source igniting.Under the situation of using so common ultraviolet light source, as pass through wavelength filter 18 illustrating, block the light of the above wavelength of 400nm basically.On the other hand, also only send the ultraviolet light source below the wavelength 400nm basically, therefore also can use such light source just like for example quasi-molecule laser source that kind.But; The ultraviolet light source price general charged of only sending basically below the wavelength 400nm like this is high, therefore adopt use ultraviolet light source that visible light also takes place and as illustrate block the light of the wavelength more than the 400nm through wavelength filter 18, basically mode be practical.
Manufacturing approach of the present invention; Certainly also can be applied: use the light polarizing film and the transparent resin film that are cut into individual, they are fitted, make above-mentioned adhesive solidification to its irradiation ultraviolet radiation by the ultraviolet hardening tackifier with following individual sheet form; Make polarization plates; Particularly in commercial production, as shown in fig. 1, be applied to the quantity-produced mode.In addition; The mode that the ultraviolet ray radiation modality is not limited to illustrate is such, shine down in the state of the contact 23 that preferably is made up of roller in driving fit; For example, duplexer 4 do not dispose special support and even contact with ultraviolet lamp 16 opposite sides and the mode of irradiation ultraviolet radiation is also contained among the present invention certainly.
Below, at first light polarizing film 1, transparent resin film 2,3 and the tackifier that constitutes polarization plates 5 described, then, carry out explanation about the manufacturing approach of polarization plates.
[light polarizing film]
Light polarizing film is formed by polyvinyl alcohol resin, and this polyvinyl alcohol resin is through being that the resin saponification obtains with polyvinyl acetate (PVA).About polyvinyl acetate (PVA) is resin, except polyvinyl acetate (PVA) as the homopolymer of vinyl acetate, also can be vinyl acetate with can with the multipolymer of other monomers of its copolymerization.As with other vinyl acetate copolymerized monomers, for example can enumerate unsaturated carboxylic acid class, unsaturated sulfonic acid class, olefines, vinyl ethers, have the acrylic amide of ammonium etc.The saponification degree of polyvinyl alcohol resin is generally 85～100 moles of %, is preferably 98 moles more than the %.Polyvinyl alcohol resin can further be modified, and for example, also can use with aldehydes modified polyethylene acetal etc.The average degree of polymerization of polyvinyl alcohol resin is generally about 1000～10000, is preferably 1500～5000 scope.
Polyvinyl alcohol resin is processed the original membrane use that membranaceous product can be used as light polarizing film.The method of making the polyvinyl alcohol resin film does not have special qualification, can adopt known method system film.Original membrane by polyvinyl alcohol resin forms for example can become the thickness about 10～150 μ m.
Light polarizing film is usually through following operation manufacturing: the operation that the polyvinyl alcohol resin film is stretched; With the dichromatism pigment polyvinyl alcohol resin film is dyeed, make the operation of its absorption dichromatism pigment; With boric acid aqueous solution the polyvinyl alcohol resin film that is adsorbed with the dichromatism pigment is carried out treatment procedures; With the operation of after the processing that utilizes this boric acid aqueous solution, washing.
Stretching can be carried out before the dyeing of adopting the dichromatism pigment, also can carry out simultaneously with dyeing, can also after dyeing, carry out.Under situation about stretching after the dyeing, this stretching can be carried out before boric acid is handled, and also can in boric acid is handled, carry out.Certainly, also can in these a plurality of stages, stretch.During stretching, can between the different niproll of peripheral speed, stretch, also can use hot-rolling to stretch.In addition, can be the dry type stretching that in atmosphere, stretches, also can be to stretch in the wet type that has taken place with solvent to stretch under the state of swelling.Its stretching ratio is generally about 3～8 times.
When adopting the dichromatism pigment that the polyvinyl alcohol resin film is dyeed, adopt for example with the method for polyvinyl alcohol resin film immersion in the WS that contains the dichromatism pigment.As the dichromatism pigment, specifically can use iodine or dichromatic organic dyestuff.Have again, before the dyeing of adopting the dichromatism pigment is handled, preferably the polyvinyl alcohol resin film is implemented in the dip treating in the water and makes its abundant swelling.
Using under the situation of iodine as the dichromatism pigment, adopting usually the polyvinyl alcohol resin film immersion in the WS that contains iodine and potassium iodide and the method that dyes.About the content of iodine in this WS and potassium iodide, with respect to per 100 weight parts waters, iodine is generally 0.01～1 weight portion, and potassium iodide is generally 0.5～20 weight portion.The temperature of the WS that is used to dye is generally 20～40 ℃, and the dip time in this WS (dyeing time) is generally 20～1800 seconds.
On the other hand, using under the situation of dichromatic organic dyestuff as the dichromatism pigment, adopting usually the polyvinyl alcohol resin film immersion in the WS that contains water-soluble dichromatism organic dyestuff and the method for dyeing.About the content of dichroic dye in this WS,, be generally 1 * 10 with respect to per 100 weight parts waters
-4～10 weight portions are preferably 1 * 10
-3～1 weight portion.This WS can contain the such inorganic salts of sodium sulphate as dyeing assistant.The temperature of the aqueous dye solutions that is used to dye is generally 20～80 ℃, and the dip time in this WS (dyeing time) is generally 10～1800 seconds.
Adopt the boric acid after the dichromatism pigment dyes to handle, adopt dyed polyvinyl alcohol resin film immersion is carried out in the method for the borated WS.About the amount of borated WS mesoboric acid, with respect to per 100 weight parts waters, be generally 2～15 weight portions, be preferably 5～12 weight portions.Using under the situation of iodine as the dichromatism pigment, this borated WS preferably also contains potassium iodide.About the amount of potassium iodide in the borated WS, with respect to per 100 weight parts waters, be generally 0.1～15 weight portion, be preferably 5～12 weight portions.Dip time in the borated WS is generally 60～1200 seconds, is preferably 150～600 seconds, more preferably 200～400 seconds.The temperature of the borated WS is generally more than 50 ℃, is preferably 50～85 ℃, further is preferably 60～80 ℃.
Polyvinyl alcohol resin film to after the boric acid processing is washed processing usually.Washing is handled for example can adopt the method for polyvinyl alcohol resin film immersion in water after boric acid is handled is carried out.The temperature of the water during washing is handled is generally 2～40 ℃, and dip time is generally 2～120 seconds.Dried is implemented in the washing back, obtains light polarizing film.Dried can use air drier, far infra-red heater etc. to carry out.
This dried is carried out about 30～600 seconds in remaining in 40～100 ℃, preferred 50～100 ℃ drying oven.Drying oven can be provided with under the situation of a plurality of drying ovens for a plurality of, and temperature separately can be identical, also can be different.Carry out under the dry situation in that a plurality of drying ovens are set, especially preferably to the mode that the drying oven back segment raises thermograde is set from the drying oven leading portion with temperature.
The thickness of the light polarizing film that obtains so for example can be about 5～40 μ m, is preferably 10～35 μ m.
[transparent resin film]
Among the present invention, at the one or both sides of the light polarizing film of making as stated 1 that forms by polyvinyl alcohol resin, by the ultraviolet hardening tackifier, applying transparent resin film 2,3, manufacturing polarization plates 5.
Transparent resin film the 2, the 3rd, the film that is formed by the thermoplastic resin with transparency gets final product, and the various transparent resin films that in the polarization plates field, use can use too in the present invention.If enumerate the instance of the resin that can become transparent resin film 2,3, have with triacetyl cellulose, diacetyl cellulose be typical example acetate fiber prime system resin, be the amorphous polyolefins resin of typical example, be the crystalline polyolefin resin of typical example with the polypropylene-based resin, be that resin is the acrylic resin of typical example, is vibrin, polycarbonate resin of typical example etc. with the PET series resin with the cyclic olefine resin with methyl methacrylate.
Acetate fiber prime system resin is cellulosic partially or completely carboxylate, can enumerate for example cellulosic acetate, propionic ester, butyric ester, their mixed ester etc.Can enumerate triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, acetylbutyrylcellulose etc. more specifically.Film by acetate fiber prime system resin-shaped becomes can use suitable commercially available article.Be fit to the instance of the commercially available acetyl cellulose resin film of employing in the present invention if enumerate; Represent with trade name that all " FUJITAC TD80 ", " the FUJITAC TD80UF " and " FUJITAC TD80UZ " that has been sold by Fuji Photo Film Co., Ltd., " KC8UX2M " that sold by Konica Minolta Co., Ltd, " KC8UY " and " KC4UY " etc. are arranged.
About the acetyl cellulose resin film, when polarization plates is pasted on liquid crystal cells, be configured in liquid crystal cell side sometimes.In this case, preferably give optical compensation function to this acetyl cellulose resin film.Can enumerate the film that for example makes acetate fiber prime system resin contain compound with phase differential regulatory function, in the surface coated of acetyl cellulose resin film have film that the compound of phase differential regulatory function obtains, with acetyl cellulose resin film single shaft or the biaxial stretch-formed film that obtains etc.If enumerate the instance of commercially available acetate fiber prime system optical compensation films, have by " WV (Wide View) the FILM WV BZ 438 " and " WV (WIDE VIEW) FILM WV EA " of Fuji Photo Film Co., Ltd.'s sale, " KC4FR-1 " that sold by Konica Minolta Co., Ltd, " KC4HR-1 " and " KC4UEW " etc.
The amorphous polyolefins resin is to have from ENB, encircle the resin of the structural unit of the such cyclic olefin of norborneol alkene monomer more, also can be the multipolymer of cyclic olefin and other the compound with polymerism carbon-to-carbon double bond.Specifically can enumerate with ENB or derivatives thereof ring-opening metathesis polymerization, to the hydrogenation of polymer that obtains and make that unsaturated link is non-existent to be called the resin that the thermoplasticity saturated norbornene is a resin, make resin that chain alkene and/or aromatic ethenyl compound and the addition polymerization of ENB or derivatives thereof form etc.
By the film that the amorphous polyolefins resin forms, can use suitable commercially available article.Be fit to the instance of the commercially available amorphous polyolefins resin molding of employing in the present invention if enumerate; All represent with trade name, have " the ATON FILM " that sell by JSR Corp., by Japanese ZEON Co., Ltd. sell " ZEONOR FILM ", " the エ ス シ one Na phasic difference FILM " that has sold by Sekisui Chemical Co., Ltd etc.
The crystalline polyolefin resin is with the crystalline resin of the such chain alkene of ethene, propylene as the primary structure unit, particularly is representative with the polypropylene-based resin.In polypropylene-based resin, except the homopolymer of propylene, also comprise propylene with can with other monomer for example random copolymers, segmented copolymer etc. of ethene, alpha-olefin of its copolymerization.The film that is formed by polypropylene-based resin also can use suitable commercially available article.If enumerate the instance of suitable commercially available polypropylene-based resin film; All represent " the FILMAX CPP FILM " that " TOHCELLO ", " the パ イ レ Application FILM " that sold by Toyo Boseki K.K that is sold by Mitsui Chemicals TOHCELLO Co., Ltd., " the ト レ Off ア Application " sold by Dongli Ltd., " the サ Application ト Star Network ス " that sold by サ Application ト Star Network ス Co., Ltd. are arranged, has sold by FILMAX society etc. with trade name.
Acrylic resin is with the resin of alkyl methacrylate as the primary structure unit, wherein, is that resin is representative with methyl methacrylate as the methyl methacrylate of primary structure unit.The film that is formed by acrylic resin also can use suitable commercially available article.If enumerate the instance of suitable commercially available acrylic resin film, represent with trade name that all " the テ Network ノ ロ イ " that sold by Sumitomo Chemical Co, " the ア Network リ プ レ Application " sold by Mitsubishi Rayon Co., Ltd etc. are arranged.
Vibrin is the resin that has ester bond-COO-in the main chain; It is that resin, PEN are resin etc. that PET series resin, polybutylene terephthalate are arranged; Wherein, the PET series resin is representative.The PET series resin is the above resin that is made up of ethylene glycol terephthalate of 80 moles of % of repetitive normally, can contain the structural unit from other copolymer compositions.The film that is formed by the PET series resin also can use suitable commercially available article.If enumerate the instance of suitable commercially available PET series resin molding; All represent " ダ イ ア ホ イ レ ", " the テ イ ジ Application テ ト ロ Application FILM " that sold by Supreme Being people デ ユ Port Application FILM Co., Ltd. that is sold by Mitsubishi Plastics Inc, " エ ス テ Le FILM spins in Japan " and " コ ス モ シ ヤ イ Application " of having been sold by Toyo Boseki K.K, " the Le ミ ラ one " that sold by Dongli Ltd. are arranged, by " the エ Application Block レ Star ト " of Unitika Corp's sale etc. with trade name.
Polycarbonate resin is the resin that has carbonic acid ester bond-O-CO-O-in the main chain, and for example, the resin that with the bisphenol-A is raw material is representative.The film that is formed by polycarbonate resin also can use suitable commercially available article.If enumerate the instance of suitable commercially available polycarbonate resin; Represent with trade name that all " ユ one ピ ロ Application シ one ト " that sold by the エ of Mitsubishi Application ジ ニ ア リ Application グ プ ラ ス チ Star Network ス Co., Ltd., " パ Application ラ イ ト シ one ト " that sold by Teijin Chemicals, Ltd. etc. are arranged.
For transparent resin film 2,3, before fitting in light polarizing film 1, can implement saponification processing, corona treatment, primary coat processing, anchoring coated etc. to binding face and be prone to bonding processing.In addition, the face at the opposition side of transparent resin film 2,3 and binding face light polarizing film 1 can have various processing layers such as hard conating, anti-reflection layer, antiglare layer.The thickness of transparent resin film 2,3 is generally the scope about 5～200 μ m, is preferably 10～120 μ m, more preferably 10～85 μ m.
[tackifier]
Be used for the tackifier of light polarizing film 1 with transparent resin film 2,3 applyings from the viewpoint of against weather, refractive index, cationically polymerizable etc., used the ultraviolet hardening tackifier.In the ultraviolet hardening tackifier; Tackifier that solidifies through free radical polymerization and the tackifier that solidifies through cationic polymerization are arranged, but especially preferably use put down in writing among the above-mentioned JP2004-245925-A, with the epoxy compound that do not contain aromatic rings in the molecule tackifier as the cationically polymerizable of major component.As the epoxy compound that does not contain aromatic rings in such molecule, for example hydrogenated epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin etc. are arranged.In the compound of cationically polymerizable that with the epoxy compound is typical example; Cooperation produces kation kind or lewis acid through ultraviolet irradiation; Cause the light cationic polymerization initiators of the cationic polymerization of cationically polymerizable compound, modulation ultraviolet hardening tackifier.In the ultraviolet hardening tackifier, also can cooperate the various adjuvants such as hot cationic polymerization initiators, light sensitizer that produce the cationic polymerization of kation kind or lewis acid, initiation cationically polymerizable compound through heating in addition.
[manufacturing approach of polarization plates]
Next with reference to Fig. 1 the manufacturing approach of the polarization plates that the present invention relates to is described.Device for Fig. 1 describes again, in this example, supplies with first transparent resin film 2 to the one side of the light polarizing film 1 of carrying along certain orientation; Supply with second transparent resin film 3 to the another side of light polarizing film 1; These 3 films fitted and become duplexer 4 with niproll 21,22 with fitting, receive ultraviolet ray irradiation from ultraviolet lamp 16 after, through carrying with deflector roll 24 and batching front nip rollers 25,26; The polarization plates that obtains 5 is batched goods roller 30, constituent apparatus by this way.
About light polarizing film 1; Many in not shown light polarizing film manufacturing process; Adopt aforesaid method, make the polyvinyl alcohol resin film handle through uniaxial tension, the dyeing of adopting the dichromatism pigment and the boric acid after the dyeing and under the state made former state supply with, certainly; Also can the product of making in the light polarizing film manufacturing process temporarily be batched behind roller, employing is drawn power traction and is gone out.On the other hand, first transparent resin film 2 and second transparent resin film 3 are adopted by not shown roller respectively draw power traction and go out.Each film is carried with the identical mode of flow direction with identical transporting velocity.
About first transparent resin film 2, fit in the face of light polarizing film 1 at it, be coated with tackifier by first coating machine 11 in advance after, this tackifier coated face is fitted in the one side of light polarizing film 1.On the other hand,, fit in the face of light polarizing film 1 at it about second transparent resin film 3, be coated with tackifier by second coating machine 13 in advance after, this tackifier coated face is fitted in the another side of light polarizing film 1.
In first coating machine 11 and second coating machine 13,, respectively tackifier is coated first transparent resin film 2 and second transparent resin film 3 from the gravure roll 12,14 that has separately.Wherein, so-called gravure roll is the roller with groove, in advance tackifier is filled in this groove, in rotation on transparent resin film 2,3 under this state, thereby tackifier is transferred on the transparent resin film 2,3.In the instance shown here, gravure roll 12,14 is with respect to the throughput direction separately of first transparent resin film 2 and second transparent resin film 3, at separately contact site with reverse rotation.For coating machine 11,13; In addition; Also can use other coating method such as scraper, coiling rod, mould coating machine, spot printing machine; If the degree of freedom of consideration film coated, trace (path line), reciprocity for answering of wide cutization preferably has the gravure roll coating machine that illustrates such gravure roll 12,14.
As first coating machine 11 and second coating machine 13; The gravure roll coating machine that use has a gravure roll 12,14 carries out under the situation of coating of tackifier; Through regulating the linear velocity suitable and the ratio of the rotation round speed degree of gravure roll 12,14, can suitably regulate the thickness of adhesive layer with the gait of march of transparent resin film 2,3.The coating thickness of adhesive layer for example is preferably about 1～10 μ m.
For first transparent resin film 2 that is coated with tackifier and second transparent resin film 3; Respectively the tackifier coated face is fitted in light polarizing film 1; Through fitting with niproll 21,22 clampings and on thickness direction, pressurizeing, become three's duplexer 4, carry to contact 23.The throughput direction (length direction) that contact 23 has the above-mentioned duplexer 4 in edge forms circular-arc convex surface.And, the convex surface driving fit limit of duplexer 4 limits and contact 23 is carried, in this process, receive ultraviolet ray irradiation from ultraviolet lamp 16, make the tackifier polymerizing curable.In illustrated instance, contact 23 is made up of roller.About contact 23, in addition, for example also can constitute, but generally be to constitute by the such roller of diagram by endless belt etc., specifically constitute by metallic roll.
Especially, constituting contact 23 with metallic roll, make it have temp regulating function, play a role as chill roll, is effective from the few viewpoint of influence that makes the heat that is produced by ultraviolet irradiation.Temp regulating function can be through at the set inside fluid passage of metallic roll, make wherein flow through cooling usefulness fluid for example the mode etc. of water give.In this case, the surface temperature of chill roll is preferably about 20～25 ℃.Constituting with metallic roll under the situation of contact 23, hard chrome plating processing, ceramic spraying plating processing etc. are implemented in its surface, it also is effective improving skin hardness.
Make second transparent resin film, 3 sides and contact 23 driving fits of duplexer 4, from i.e. first transparent resin film, the 2 side irradiation ultraviolet radiations of the opposition side of 16 pairs of duplexers 4 of ultraviolet lamp.
At this moment; In the luminous side of ultraviolet lamp 16, be between ultraviolet lamp 16 and the duplexer 4; Configuration can be blocked the light wavelength wave filter 18 of the above wavelength of 400nm; Make the light that sends from ultraviolet lamp 16 pass through this wavelength filter 18, block the light of the above wavelength of 400nm basically, the ultraviolet ray that in fact will only contain the wavelength below the 400nm shines duplexer 4.Through this ultraviolet ray irradiation; To solidify respectively at tackifier between first transparent resin film 2 and the light polarizing film 1 and the tackifier between the light polarizing film 1 and second transparent resin film 3, first transparent resin film 2 is bonding with light polarizing film 1 with the light polarizing film 1 and second transparent resin film 3.
Material to wavelength filter 18 does not have special qualification, but from stable on heating viewpoint, preferably on glass substrate, adopts vacuum vapour deposition, ion assisted deposition method, sputtering method etc. with dielectric film or metal film system film.For wavelength filter 18; Can use the suitable commercially available article that can the photoresistance of the wavelength more than the 400nm be broken, but especially, wavelength is preferably more than 80% at the mean value of the optical transmission rate between 250nm～400nm; Especially preferably more than 85%; And more than wavelength 400nm, until the mean value of the optical transmission rate of the scope of 500nm at least,, more preferably below 2%, be preferably below 1% especially preferably less than 5%.
Light source to using in the ultraviolet lamp 16 does not have special qualification, can use below wavelength 400nm, have luminescence distribution, for example low pressure mercury lamp, medium pressure mercury lamp, high-pressure sodium lamp, ultrahigh pressure mercury lamp, chemical lamp, black lamp, microwave-excitation mercury lamp, metal halide lamp etc.To the rayed intensity of ultraviolet hardening tackifier, can still not have special the qualification according to the decisions such as composition of the tackifier that uses, but the exposure intensity of the preferred effective wavelength region may of activate to initiating agent is 0.1～1000mW/cm
2
About the irradiation time of ultraviolet ray to duplexer 4, determine does not still have special the qualification according to the composition of the ultraviolet hardening tackifier that uses etc., but preferred be 10～2000mJ/cm with accumulation light quantity as the product representation of exposure intensity and irradiation time
2Mode set.Be employed under the situation of the mode of irradiation ultraviolet radiation under the state that as illustrating, makes duplexer 4 and contact 23 driving fits, through during the contact 23, realize that this accumulation light quantity is 10～2000mJ/cm at duplexer 4
2, this make on the abundant polymerizing curable of tackifier preferred especially.If the accumulation light quantity of this moment is very few, might be not enough from the generation of the spike of initiating agent, the curing of tackifier becomes insufficient.On the other hand, if this accumulation light quantity is excessive, sometimes because the ultraviolet ray of irradiation produces deterioration in transparent resin film, light polarizing film and/or tackifier.
Linear velocity to duplexer 4 does not have special qualification yet, but preferred limit applies the tension force of 100～800N on throughput direction (length direction), and the limit is 10～2000mJ/cm according to making the accumulation light quantity
2The scope of mode about 10～50m/ minute in set linear velocity.Distance between ultraviolet lamp 16 and the duplexer 4 does not have special qualification yet, but preferably becomes 10～2000mJ/cm with the accumulation light quantity
2Mode, in the scope of 10～500mm degree, set distance (under the situation that as Fig. 1, makes duplexer 4 and contact 23 driving fits, both bee-lines) from the ultraviolet light source that constitutes ultraviolet lamp 16 to duplexer 4.Be positioned at the transparent resin film 2 of ultraviolet lamp 16 sides; For the ultraviolet ray that utilizes irradiation makes adhesive solidification effectively, preferably a part or the transmissivity in the Zone Full to the effective wavelength region may of activate of the initiating agent that constitutes tackifier is more than 60%.
Receive ultraviolet irradiation, with the duplexer behind the adhesive solidification 4, become polarization plates 5, through carrying with deflector roll 24 and batching front nip rollers 25,26, batch goods roller 30.
[other explanations]
Among the present invention, as previously mentioned,, can process polarization plates 5, preferably as illustrated so far, at the two sides of light polarizing film 1 applying transparent resin film 2,3 at the one or both sides applying transparent resin film 2,3 of light polarizing film 1.On the other hand; For the mode of only processing polarization plates at the one side applying transparent resin film of light polarizing film 1; Through from above explanation, omitting explanation, can easily understand enforceable degree to those skilled in the art about a side transparent resin film.
Embodiment
Embodiment below is shown the present invention is explained more specifically, but the present invention does not receive the qualification of these embodiment.
[embodiment 1]
Use the device of such configuration roughly as shown in fig. 1; Carry iodine to be adsorbed in the light polarizing film 1 of thick about 30 μ m of polyvinyl alcohol film and orientation continuously; To its simultaneously supply with the thick 60 μ m that obtain by Japanese ZEON Co., Ltd., wide 1330mm as " the ZEONOR FILM " of amorphous polyolefins resin molding as first transparent resin film 2, to another side supply with the thick 80 μ m that obtain by Fuji Photo Film Co., Ltd., wide still for 1330mm as " the FUJITAC TD80 " of tri acetyl cellulose membrane as second transparent resin film 3.Then; At first transparent resin film 2 and binding face light polarizing film 1; By first coating machine 11 with gravure roll 12 (" the Micro Chamber Doctor: マ イ Network ロ チ ヤ Application バ one De Network タ one " of machinery Co., Ltd. of Fuji system); And at second transparent resin film 3 and binding face light polarizing film 1; Also still by second coating machine 13 with gravure roll 14 (being similarly " the マ イ Network ロ チ ヤ Application バ one De Network タ one " of Fuji machinery Co., Ltd. system), be that the mode of about 2 μ m is coated with respectively the epoxy compound ultraviolet hardening tackifier that cooperation forms with the light cationic polymerization initiators according to making thickness.
Next, make the two sides of first transparent resin film 2 and second transparent resin film 3 tackifier coated face and light polarizing film 1 separately overlapping, fit with niproll 21,22 clampings, process duplexer 4 with fitting.Then; Make the tri acetyl cellulose membrane side of its second transparent resin film 3 of conduct of duplexer 4 be wound up into surface temperature be set at 23 ℃ chill roll 23 outer peripheral face and make its driving fit; Simultaneously with linear velocity 20m/ minute, apply the tension force of 600N in the longitudinal direction and carry.
The opposition side (as the amorphous polyolefins resin molding side of first transparent resin film 2) of the chill roll 23 of the duplexer of carrying on limit and chill roll 23 driving fit limits 4, configuration ultraviolet lamp 16 (the GS Yuasa of Co., Ltd. system).Then, will through wavelength filter 18 back irradiation duplexers 4, make adhesive solidification from the ultraviolet ray of its metal halide lamp that has 2 lamps ejaculation.Will be from the lamp the ultraviolet lamp 16 to duplexer 4 bee-line be set at 200mm.Use therein wavelength filter 18 is obtained by Jing Bang light film Industrial Co., Ltd, and the average transmittance of the light between wavelength 250nm～400nm is 88%, and the average transmittance of the light between wavelength 400nm～500nm is 1%.
The luminescent spectrum of the wavelength 250nm～500nm of the metal halide lamp that will use as ultraviolet light source representes with bold curve A in Fig. 2, and the Optical transmission spectrum of the wavelength 250nm～800nm of wavelength filter 18 is represented with thin curve B in Fig. 2.Among Fig. 2, transverse axis is that A, B are shared, expression wavelength (nm), and the left longitudinal axis corresponding with curve A represented the luminous intensity of metal halide lamp, the right longitudinal axis corresponding with curve B represented transmissivity (%).Have, the luminous intensity of lamp is counted 100 relative value and is represented with giving intensity under the peaked wavelength again.
When making the power of ultraviolet lamp 16 be 120W, the accumulation light quantity in the wavelength region may of 200～400nm is 510mJ/cm
2, near the atmosphere temperatures that shone the chill roll 23 of the duplexer 4 when ultraviolet are 110 ℃.After the ultraviolet ray irradiation, then, successively through carrying with deflector roll 24 and batching front nip rollers 25,26; One side applying amorphous polyolefins resin molding 2 in light polarizing film 1; At another side applying tri acetyl cellulose membrane 3, obtain the polarization plates 5 of thick about 174 μ m, it is batched in goods roller 30.Make the light of the polarization plates reflector fluorescent light that obtains, carry out visualization, hot spot is not observed in the mapping of the picture former state of fluorescent light ground as a result.
[embodiment 2]
Among the embodiment 1; Replacement uses " the ダ イ ア ホ イ Le " of the biaxial stretch-formed polyethylene terephthalate film of conduct of the thick 38 μ m that obtain from Mitsubishi Plastics Inc, wide 1330mm as first transparent resin film 2 as " the ZEONOR FILM " of amorphous polyolefins resin molding; Replace tri acetyl cellulose membrane " FUJITAC TD80 " and use among the embodiment 1 as first transparent resin film 2 use as " the ZEONOR FILM " of amorphous polyolefins resin molding as second transparent resin film 3; In addition; The power that makes ultraviolet lamp 16 is 140W, has likewise made polarization plates with embodiment 1 in addition.At this moment, be 630mJ/cm to the accumulation light quantity in the wavelength region may of 200～400nm of duplexer 4 irradiation
2, near the atmosphere temperatures that shone the chill roll 23 of the duplexer 4 when ultraviolet are 132 ℃.Make the light of the polarization plates reflector fluorescent light that obtains, carry out visualization, hot spot is not observed in the mapping of the picture former state of fluorescent light ground as a result.
[comparative example 1]
Not making ultraviolet ray from ultraviolet lamp 16 irradiation,, in addition, likewise made polarization plates with embodiment 1 to duplexer 4 irradiations through under the situation of wavelength filter 18.At this moment, the accumulation light quantity in the wavelength region may of 200～400nm that duplexer 4 shines is 510mJ/cm
2, near the atmosphere temperatures that shone the chill roll 23 of the duplexer 4 when ultraviolet are 223 ℃.Make the light of the polarization plates reflector fluorescent light that obtains, carry out visualization, the result observes a plurality of tiny white points in the picture of fluorescent light, produced hot spot.
[comparative example 2]
Not making ultraviolet ray from ultraviolet lamp 16 irradiation,, in addition, likewise make polarization plates with embodiment 2 to duplexer 4 irradiations through under the situation of wavelength filter 18.At this moment, the accumulation light quantity in the wavelength region may of 200～400nm that duplexer 4 shines is 630mJ/cm
2, near the atmosphere temperatures that shone the chill roll 23 of the duplexer 4 when ultraviolet are 265 ℃.Make the light of the polarization plates reflector fluorescent light that obtains, carry out visualization, the result observes a plurality of tiny white points in the picture of fluorescent light, produced hot spot.
Claims (5)
1. method of making polarization plates, it comprises by the ultraviolet hardening tackifier transparent resin film is fitted in the light polarizing film that is formed by polyvinyl alcohol resin, makes said adhesive solidification to its irradiation ultraviolet radiation,
The curing of said tackifier is carried out through the ultraviolet ray that irradiation only contains the wavelength below the 400nm basically.
2. the method for claim 1, wherein
Basically only containing the ultraviolet ray of the wavelength below the 400nm, is to make ultraviolet ray that the wave filter of the light that sent by the ultraviolet lamp light through can blocking the wavelength more than the 400nm obtains, that the light of the wavelength more than the 400nm is blocked basically.
3. according to claim 1 or claim 2 method, wherein,
Respectively by said tackifier applying transparent resin film, carry out said ultraviolet irradiation on the two sides of light polarizing film from a side transparent resin film side.
4. like each described method in the claim 1～3, wherein,
Carry the light polarizing film of strip and the transparent resin film of strip respectively continuously; By said tackifier this transparent resin film is fitted in this light polarizing film; With the duplexer that obtains be wound up into have with its throughput direction quadrature the axle roller outer peripheral face and make its driving fit, carry out said ultraviolet irradiation from a side opposite of this duplexer with said roller.
5. method as claimed in claim 4, wherein,
Carry the light polarizing film of strip and the transparent resin film of 2 strips respectively continuously; Respectively this transparent resin film is fitted in the two sides of this light polarizing film by said tackifier; The duplexer that obtains is wound up into the outer peripheral face of said roller and makes its driving fit, carry out said ultraviolet irradiation from the transparent resin film side of the side opposite of this duplexer with said roller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011071905A JP2012208187A (en) | 2011-03-29 | 2011-03-29 | Method for manufacturing polarizing plate |
| JP2011-071905 | 2011-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102736157A true CN102736157A (en) | 2012-10-17 |
| CN102736157B CN102736157B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210077791.9A Active CN102736157B (en) | 2011-03-29 | 2012-03-22 | The manufacture method of polarization plates |
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| Country | Link |
|---|---|
| JP (1) | JP2012208187A (en) |
| KR (3) | KR20120112073A (en) |
| CN (1) | CN102736157B (en) |
| TW (1) | TW201248218A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869398A (en) * | 2012-12-13 | 2014-06-18 | 日东电工株式会社 | Method for producing polarizing plate |
| CN107450122A (en) * | 2017-08-16 | 2017-12-08 | 住华科技股份有限公司 | Bonding system and method for manufacturing optical film using same |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103858031B (en) * | 2011-10-07 | 2016-04-06 | 住友化学株式会社 | The manufacture method of polarization plates |
| JP6154128B2 (en) * | 2012-12-20 | 2017-06-28 | 住友化学株式会社 | Manufacturing method of polarizing plate |
| JP2014153444A (en) * | 2013-02-06 | 2014-08-25 | Konica Minolta Inc | Retardation film, polarizing plate, and liquid crystal display |
| KR101584442B1 (en) * | 2013-06-12 | 2016-01-22 | 주식회사 엘지화학 | Method for polarizer comprising a step for adjusting color of polarizing element by uv irradiation |
| WO2016140182A1 (en) * | 2015-03-03 | 2016-09-09 | 住友化学株式会社 | Method for manufacturing polarizing film equipped with protective film |
| WO2020261876A1 (en) * | 2019-06-27 | 2020-12-30 | 日東電工株式会社 | Method for manufacturing laminated film |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201248218A (en) | 2012-12-01 |
| JP2012208187A (en) | 2012-10-25 |
| KR20190033505A (en) | 2019-03-29 |
| KR20120112073A (en) | 2012-10-11 |
| KR20180048508A (en) | 2018-05-10 |
| CN102736157B (en) | 2016-08-17 |
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