CN102282485B - Method for manufacturing polarizing plate - Google Patents
Method for manufacturing polarizing plate Download PDFInfo
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- CN102282485B CN102282485B CN2010800049412A CN201080004941A CN102282485B CN 102282485 B CN102282485 B CN 102282485B CN 2010800049412 A CN2010800049412 A CN 2010800049412A CN 201080004941 A CN201080004941 A CN 201080004941A CN 102282485 B CN102282485 B CN 102282485B
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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Abstract
Disclosed is a method for manufacturing a polarizing plate including both a film having a high laser-beam absorption rate and a film having a low laser-beam absorption rate, in which a strip-shaped polarizing plate is cut, leaving only a peeling film layer formed on the surface to be bonded to a substrate. The method for manufacturing the polarizing plate comprises: cutting from the upper surface of a surface protection film layer down to a layer immediately above a layer formed of the film having a low laser-beam absorption rate by using a laser; and subsequently cutting the layer formed of the film having a low laser-beam absorption rate and an adhesive layer by using a cutter. According to the method for manufacturing the polarizing plate, a delamination does not occur between a polarizer protection film layer and a surface protection film layer both constituting the polarizing plate and a contamination due to the adhesive running off from the cutting surface does not also occur, so that it is possible to obtain a polarizing plate excellent in close-bonding property with respect to a substrate.
Description
Technical field
The present invention relates to the manufacturing approach of applied Polarizer in the image display device of liquid crystal indicator etc. and the Polarizer that cuts off through this method.The manufacturing approach of the layer that specifically, relates to constitute and the two Polarizer that all contains of layer of constituting by the film of low absorptivity and the Polarizer that cuts off through this method by the film that laser is had high-absorbility.
Background technology
Liquid crystal indicator is from having brought into use since desk-top computer and electronic clock etc., and its purposes is continuing expansion rapidly in recent years.In other words, to large-scale tv, its picture dimension size is all being used liquid crystal indicator from the mobile apparatus of mobile phone etc.In addition, except liquid crystal indicator, organic electroluminescent (organic EL, Organic Electro-Luminescence) display device is that the center is increase trend with the purposes of mobile device also.Therefore, the requirement that is applied to the Polarizer of these image display devices is also increasing, and also just requires it to have the performance that can be adapted to various uses.
The Polarizer of general widespread use in the aforesaid image display device; It is the two sides that is adsorbed the polarizing layer 1 that is oriented in polyvinyl alcohol resin film at the dichroism pigment; Through aqueous adhesive phase, be that the polarisation protective film lamination of representative is processed with the three cellulose acetate membrane.In this state; Perhaps as required; Pass through adhesive phase; Additional with circular oval-shaped Polarizer and polarizer with optical characteristics, prevent functions such as the anti-dazzle material of surface reflection, light diffusing sheet, reflecting plate state under, be attached to image display original sets such as liquid crystal cell and organic EL display element, thus the composing images display device.In addition; For the structure of Polarizer can also be on image-displaying member pad pasting; For preventing the scuffing and the pollution of polarisation protective film surface or additional function film surface; And peel off rete the polarisation protective film sticking through adhesive phase with surface image-displaying member binding face one side or additional function film surface, can stick the surface protection rete through bonding agent on the opposite side surface of polarisation protective film.
The layer of the above-mentioned Polarizer that in the past used constitutes as shown in Figure 4.That is to say, shown in Fig. 4 by Polarizer 12 by surface protection rete 4, adhesive phase 3, polarisation protective film 2, polarizing layer 1, polarisation protective film 2a, additional function rete 5, adhesive phase 6, peel off rete 7 and constituted.In such formation, the layer of additional function rete for selecting arbitrarily to use is nonessential layer.
In addition, in recent years, in the image display device of mobile device purposes such as mobile phone, from design and Portability aspect, module whole all develops towards thinner direction with very thinization.Therefore; Polarizer as the image display device material also is asked to more frivolous; As shown in Figure 1, in the formation of the Polarizer of in Fig. 4, representing in the past, used the Polarizer of the additional function rete that has polarisation protective film function simultaneously; Thereby just do not have polarisation protective film 2a, propose to use such Polarizer.
That is to say that banded Polarizer shown in Figure 1 is by surface protection rete 4, adhesive phase 3, polarisation protective film 2, polarizing layer 1, additional function rete 5, adhesive phase 6, peel off 7 of retes and constitute.Cycloolefine polymer film as such function additive type film is that everybody is familiar with.
The Polarizer normally banded film of longitudinal extension is rolled into tubular and provides; Polarizer is sticked on the sticking obedient method of image-displaying member etc.: cut banded Polarizer according to the size of the image-displaying member of crystal liquid substrate etc. in advance, then the polarisation plate is attached on the image-displaying member one by one.Through such method, when image-displaying member applying polarisation plate,, stripping film is peeled off from the polarisation plate, so be difficult to shorten engineering time because before fitting, need elder generation with the transfer one by one of polarisation plate.In addition, the polarisation plate normally scales off from the light polarizing film of drum, curls easily, when transfer or conveyance, is not easy to operation.Further; When image display device is LCD; Polarizer must make the vertical or 45 ° of tilted configuration of lateral excursion with respect to the LCD picture that see through of Polarizer; So need in advance the banded Polarizer of drum is cut with respect to 45 ° of directions of vertical works of reel, cause like this to have a big chunk near the two ends of reel and can not utilize.Especially the picture increaseization along with LCD needs to use large-sized Polarizer, makes the utilization rate reduction of Polarizer become problem.In addition, the Polarizer that can not be used for fitting is the compound of multiple material because of its cutting side, so be difficult to utilize the problem that the result causes discarded object to increase again.
For addressing these problems; The fit Polarizer laminating apparatus (for example Jap.P. JP2005-37416-A) of Polarizer of counterpart substrate is disclosed in recent years; For on banded Polarizer through the bonding banded film of peeling off rete of adhesive phase; Cut along the length of vertical direction counterpart substrate longitudinally, stay the above-mentioned rete of peeling off.This device has possessed the cutting method of cutting in vertical vertical direction of above-mentioned banded Polarizer and above-mentioned adhesive phase; Peel off the stripping film separation method that the diaphragm of rete after cut out through above-mentioned cutting separates with above-mentioned; Make the section of anterior end surface and above-mentioned diaphragm of the substrate of bringing parallel, the applying method that the correspondence position of binding face that separates the above-mentioned diaphragm of peeling off rete and substrate is fitted.
Through this method, can Polarizer be attached on the image-displaying member continuously and automatically, the Polarizer after the cut-out need not transfer, and peel off rete and also be not cut off, thus be a kind ofly to have realized quick applying, and do not waste the method for Polarizer cut off machine.Therefore, by this method, when the cutting of banded Polarizer, the cutting (below be sometimes referred to as hemisect) of only peeling off the Polarizer that rete stayed is as necessary condition.That in this cutting method, is known has, and uses and gives as security cut type cutting machine, wheel type cutting machine, is provided with the rotating shaft of blade, driving blade, the lower dead point position adjustment component of adjustment blade lower dead point position.Yet different cutting machines, if the sharp keen section of its edge of a knife angle is perfect, the blade life of stapling machine is shorter; On the other hand; Edge of a knife angle can be overflowed adhesive agent and bonding agent at section after becoming the obtuse angle, problems such as the article of applying then possibly take place to pollute, in addition when sticking substrate; Difference in various degree can appear in the angle according to the edge of a knife of employed cutting machine; Using under the situation of cutting machine, there is following shortcoming, can there be the physical property that has influence on Polarizer such as the surface protection film pull-up on the polarisation protective film that constitutes Polarizer from, moisture-proof reduction etc. at the section of Polarizer.
The size of image-displaying member that contrasts crystal liquid substrate etc. in advance is with after the banded Polarizer cutting; The polarisation plate is attached in the classic method on the image-displaying member one by one; Above-mentioned because of blade be the disengaging of the surface protection rete on overflowing of adhesive agent and bonding agent even the light protective film in the problem that takes place on the cutting-off method; Can be after cut-out to these problems; Polarizing layer cut-out end face is carried out processed in advance remove these shortcoming points, so just can be fitted on the image-displaying member.But, in the mode of above-mentioned hemisect, cut off the back and will be in advance in continuous operation carry out in processed difficulty comparatively, so need a kind of cutting method of not having the shortcoming point section.
On the other hand, the well-known method of utilizing laser to cut banded Polarizer in addition.For example, in Jap.P. JP2008-284572-A, put down in writing, utilized laser radiation to realize cutting banded Polarizer.Specifically; The two sides of polyvinyl alcohol resin (PVC) rete a pair of Triafol T (TAC) rete of fitting; Be provided with barrier film at the TAC of side rete through the propylene type adhesive phase by polyethylene terephthalate (PET); Be provided with the surface protection rete that is made up of the PET film in another TAC rete side through the propylene type adhesive phase, the banded Polarizer that constitutes like this can be cut off through laser radiation.
In Jap.P. JP2008-284572-A, be that higher film (being designated hereinafter simply as " laser high-absorbility the film ") lamination of average absorption rate by laser in the excitation wavelength range of the laser of irradiations such as PVA film, TAC film, PET film forms, for example be higher than 2% film lamination and form by this average absorption rate as the banded Polarizer that is cut off object.The lamination-type Polarizer that this laser high-absorbility film is constituted, according to the classic method shown in Jap.P. JP2008-284572-A, the section of Polarizer does not have distortion, has realized the excellent cutting effect.
But; In the method shown in the JP2008-284572-A; Except laser high-absorbility film; Also contain the low film (following abbreviate as sometimes " laser low absorptivity film ") of average absorption rate to laser in the excitation wavelength range of the laser of irradiation such as cycloolefine polymer film, polypropylene screen, methyl methacrylate film, when for example this average absorption rate is cut off at the banded Polarizer of the layer that film constituted below 2%, if output power of laser is little; The layer that laser high-absorbility film constitutes in the banded Polarizer can be cut off, but the layer that laser low absorptivity film constitutes but can not be cut off.On the other hand, if output power of laser is big, the layer that layer that the laser high-absorbility film in the then banded Polarizer constitutes and laser low absorptivity film constitute can be cut off.But in this case, the layer that laser high-absorbility film constitutes is because of heating surplus, causes the end fusion of cut Polarizer and causes cutting off the distortion (with reference to Fig. 6) of end.The Polarizer of section warpage, its section quality descends.Further, can cause variety of issue because of such section quality reduction.For example, Polarizer is asked to have the cohesive of height when fitting with glass substrate.But, because of the uneven of Polarizer section produces problems such as bubble at the binding face with glass substrate.
In addition; Banded Polarizer for the layer that contains laser low absorptivity film formation; Increase output power of laser, when the layer that laser low absorptivity film constitutes is cut off, constitute by laser high-absorbility film usually because be positioned at the peel ply of the lower position of the layer that laser low absorptivity film constitutes; So just caused before laser low absorptivity film is melted cut-out, peel off rete and just be cut off.Therefore, need only stay peel ply and cut off in the so-called hemisect formula cutting-off method of other all retes that constitute Polarizer, be considered to be difficult to use laser method.
For this reason; Present inventors find, double laser high-absorbility film layer that constitutes and the layer that laser low absorptivity film constitutes of containing also contains the banded Polarizer of the peel ply of the high absorbing film formation of laser; Cutting off this Polarizer requirement only stays other rete and the adhesive phase peeling off rete and constitute Polarizer and all is cut off; After the cut-out, constitute do not have substantial disengaging between polarisation protective film and the surface protection rete of Polarizer, not overflow the blade life of adhesive agent and bonding agent and cutting machine at section long, only stayed stripping film exactly; And other rete and all cut feasible method of adhesive phase of formation Polarizer; In order to find the manufacturing approach of this Polarizer,, thereby accomplished the present invention through self-criticism with keen determination.
Summary of the invention
The present invention contains following content.
[1] a kind of manufacturing approach of banded Polarizer comprises: in the one side of the polarizing layer that is made up of polyvinyl alcohol resin film, lamination has the polarisation protective film that is made up of laser high-absorbility film; The face opposite with polarizing layer in this polarisation protective film passes through adhesive phase, and lamination has the surface protection rete that is made up of laser high-absorbility film; At the another side of polarizing layer, the layer that is made up of laser low absorptivity film is arranged through the adhesive layer lamination; And, the face opposite of the layer that constitutes at this laser low absorptivity film with polarizing layer; Have by what laser high-absorbility film constituted through the adhesive phase lamination and to peel off rete, and the banded Polarizer that forms, for said banded Polarizer; Only stay and peel off rete; And cut-out constitutes other formation layer of Polarizer, is cut to the layer layer before that is made up of laser low absorptivity film with laser from the surface protection rete, follows with cutting machine and cuts off layer and the adhesive phase that is made up of laser low absorptivity film.
[2] institute's record method in [1], laser low absorptivity film be the average absorption rate of laser at the film 2% below, laser high-absorbility film is that the average absorption rate of laser is above 2% film.
[3] institute's record method in [2], laser low absorptivity film is that the average absorption rate of laser is the film below 1%.
[4] contain the polarisation protective film that laser high-absorbility film constitutes between the layer that institute's record method in [1]～[3], polarizing layer and laser low absorptivity film constitute.
[5] any one method of record in [1]～[4], laser low absorptivity film be cycloolefine polymer film, polypropylene screen, also have the methyl methacrylate film.
[6] any one method of record in [1]～[5], laser is carbon dioxide laser.
[7] Polarizer of any one record method manufacturing in basis [1]～[6].
According to polarizing plate making method of the present invention; Only stay stripping film when cutting banded Polarizer; Promptly adopt the hemisect method, when Polarizer not only contains laser high-absorbility film but also contain under the situation of laser low absorptivity film, the surface protection rete that banded Polarizer is cut off on the polarisation protective film that constitutes Polarizer on the section of the Polarizer after the processing does not break away from fact; There is not overflowing of bonding agent at section yet; Stayed exactly and peeled off rete and layer that surface protection rete, polarizing layer, laser low absorptivity film constitute is cut off,, also had the effect that prolongs employed cutting machine blade life in cut-out because use together with laser.
Description of drawings
[Fig. 1] is applicable to the cross-section model that the layer of the light-weighted banded Polarizer of an example of the present invention constitutes.
[Fig. 2] is applicable to the cross-section model that the layer of a routine banded Polarizer of the present invention constitutes.
[Fig. 3] is with the cross-section model of two steps cut-out among the present invention.
The cross-section model that the layer of a routine Polarizer that is suitable in [Fig. 4] classic method constitutes.
The microphotograph that utilizes the Polarizer section that the inventive method cuts off that obtains among [Fig. 5] embodiment 1.
[Fig. 6] only uses the microphotograph of the section of the Polarizer that fixing dise knife cuts off.
The microphotograph of the fixing dise knife after employed Polarizer cuts off in [Fig. 7] comparative example 1.
The microphotograph of the fixing dise knife after employed Polarizer cuts off in [Fig. 8] comparative example 1.
Embodiment
Below will suitably specify the present invention with reference to accompanying drawing.Shown in Figure 1 is the cross-section model that is applicable to the layer formation of the light-weighted banded Polarizer of an example of the present invention.Banded Polarizer among Fig. 1 is to form according to following order lamination: the one side of polarizing layer 1 post through the adhesive layer (not shown) polarisation protective film 2, polarisation protective film 2 polarizing layer offside (top) through adhesive phase 3 post surface protection rete 4, the other one side of polarizing layer 1 through the adhesive layer (not shown) stick have polarisation defencive function and phase differential can the layer 5, the adhesive phase 6 that constitute by laser low absorptivity film and peel off rete 7.
Banded Polarizer in the present invention implements normally is provided with the reel form along the banded film of longitudinal extension; The size that contrasts image-displaying member is in advance cut banded Polarizer; Only stay and peel off after the rete 7; To peel off rete and peel off, the polarisation plate will be stacked on the image-displaying member one by one from Polarizer.So; As only staying rete cuts according to the size of required image-displaying member Polarizer from banded film the method for peeling off; At first; During the situation of banded Polarizer as shown in Figure 1; With after the laser cutting, the layer 5 and the adhesive phase 6 usefulness cutting machines that are made up of laser low absorptivity film cut off till uppermost surface protection rete 4, adhesive phase 3, polarisation protective film 2, polarizing layer 1, the adhesive layer (not shown), during the situation of banded Polarizer perhaps as shown in Figure 2; With after the laser cutting, the layer 5 and the adhesive phase 6 usefulness cutting machines that are made up of laser low absorptivity film cut off till uppermost surface protection rete 4, adhesive phase 3, polarisation protective film 2, polarizing layer 1, polarisation protective film 2a, the adhesive layer (not shown).
Used polarizing layer 1 is to have the film that can from the natural light of injecting, filter out the linear polarization function among the present invention, can use the dichromatism pigment by the light polarizing film of the adsorbed orientation of polyvinyl alcohol resin film.The laser average absorption rate of this film for example is about 6% greater than 2%.The polyvinyl alcohol resin that constitutes polarizing layer 1 can be obtained by the saponified polyvinyl acetate resin.Can be outside the polyvinyl acetate (PVA) of independent polymkeric substance of vinyl acetate as polyvinyl acetate resins, also have example to say can be with vinyl acetate and other can with the formed multipolymer of the monomer of its copolymerization.As with other monomers of vinyl acetate copolymerization, can enumerate out unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, have amino acrylic amide.The saponification degree of polyvinyl alcohol resin is generally about 85～100 moles of %, is preferably 98 moles more than the %.This polyvinyl alcohol resin can also make it further modification again, for example, also can use with the PVF of aldehydes modification and Pioloform, polyvinyl acetal etc.In addition, the registration of polyvinyl alcohol resin is generally 1,000～10, and about 000, be preferably about 1,500～5,000.
The film of processing with such polyvinyl alcohol resin is used as the former anti-film of 1 layer of polarisation.The film-forming method of polyvinyl alcohol resin does not have special qualification, uses known method system film to get final product.The thickness of the former anti-film that the use polyvinyl alcohol resin makes is for doing special qualification, for example about 1～150 μ m.If consider and extend easily that its thickness is preferably more than the 10 μ m.
Polarizing layer 1 is a process; With such polyvinyl alcohol resin film carry out uniaxial tension operation, with the dichromatism pigment polyvinyl alcohol resin dyeing is made operation of its absorption dichromatism pigment, the washing step of polyvinyl alcohol resin film after with boric acid aqueous solution treatment procedures and boric acid aqueous solution processing that will adsorb the dichromatism pigment, manufacturing forms.The dichromatism pigment can use iodine and dichromatic organic dyestuff.
Polarisation protective film 2 and 2a used among the present invention are made up of laser high-absorbility film, and the average absorption rate of laser can be made up of suitable transparent film usually greater than 2%.Wherein, the film processed of good resins such as the preferred homogeneity of using the transparency and optical characteristics, physical strength, thermal stability.Also can enumerate polyester resin film, polycarbonate resin adipose membrane, polyethersulfone resin membrane, polysulfone resin film, polyimide resin film of cellulose-based resin film, polyethylene terephthalate or polyethylene glycol isophthalate, the polybutylene terephthalate and so on of Triafol T for example or cellulose diacetate and so on etc.Transparency protected rete 2 and 2a form toward polarizing layer 1 superimposed layer through adhesive layer, known adhesive agent in this field capable of using, and this known adhesive agent, higher in the average absorption rate of the excitation wavelength range inner laser of the laser of irradiation, usually greater than 2%.
Can enumerate out water-soluble adhesive agent, organic solvent type adhesive agent, hot melt adhesive type adhesive agent, non-solvent adhesive agent etc. as such adhesive agent.More specifically can enumerate out as water-soluble adhesive agent, for example the polyvinyl alcohol resin WS, aqueous two-component polyurethane type latex adhesive agent etc.; As the organic solvent type adhesive agent, two component polyurethane type adhesive agent etc. for example; As the non-solvent adhesive agent, mono-component polyurethane type adhesive agent etc. for example.With the faying face of polarisation through saponification processing etc., when being used as the polarisation diaphragm, preferably use polyvinyl alcohol (PVA) type resin aqueous solution as adhesive agent by the CAM of hydrophilicity-imparting treatment.At the polyvinyl alcohol (PVA) type resin that uses as adhesive agent; Except the polyvinyl acetate (PVA) of the independent polymkeric substance of vinyl acetate is handled by saponification and the alcotex that obtains; Can also be vinyl acetate and can be handled the vinyl alcohol type co-polymer that obtains by saponification, even can also be the modified poly ethylene alkoxide polymer that is modified of the hydroxyl part of above-mentioned polymkeric substance etc. with the formed co-polymer of other monomer of its polymerization.In this adhesive agent, also can use polyaldehyde, soluble epoxide compound, melamine compounds etc. as adjuvant.
Polarizer among the present invention as the formation layer material of this Polarizer, uses laser low absorptivity film.The average absorption rate of the excitation wavelength range laser of irradiating laser is preferably below 1% usually below 2%.In this manual, [the average absorption rate (%) of the excitation wavelength range laser of irradiating laser] can be measured according to ATR (ATR, the Attenuated total reflection) method of conventional known.Should [ATR method] be with light (laser) irradiation that contains any wavelength, to obtain absorption spectrum on the determination object surface through the total reflection light of measuring institute determination object surface for determination object.In the excitation wavelength range of irradiating laser, contain the absorptivity of the light of any wavelength, measure with the ATR method, according to the mean value of the absorptivity that calculates, can obtain above-mentioned [the average absorption rate (%) of the excitation wavelength range laser of irradiating laser].
Can enumerate out propylene type resin molding, the polyolefin-type resin molding that gathers (methyl) methyl acrylate or gather (methyl) ethyl acrylate appearance as laser low absorptivity film; Cyclic olefin with ENB appearance is the cyclic olefin type resin molding of monomer, more particularly can enumerate cyclic olefin polymer (COP) film, polypropylene (PP) film, polymethylmethacrylate (PMMA) film etc.These films receive the requirement of Polarizer to have the function of phase retardation film in the nature of things, also have good absorbent function and the damp proof function of preventing, as banded Polarizer shown in Figure 1, can also replace using with the polarisation diaphragm of TAC etc.
In addition; Polarizer among the present invention; Can also add that phase differential rete, field-of-view angle enlarge rete, prevent the rete with additional function of reflective coating, anti-dazzle rete, reflective coating etc.; Corresponding its purpose, can make an addition to that surface protection rete and laser low absorptivity rete constitute layer in random layer, these additional function retes are to be made up of laser high-absorbility film.Perhaps several layers of available in addition one decks.
Among the present invention, constitute the bonding agent that uses in the adhesive phase 3 and 6 of Polarizer, can use the bonding agent of this known.The average absorption rate of the laser in the excitation wavelength range of the irradiating laser of this known bonding agent is higher, usually greater than 2%.For example, can use and contain just like acrylic compounds, rubber-like, polyurethanes, silicone based bonding agent as base polymer.In addition, can also be bonding agents such as energy line constrictive type, thermmohardening type.This wherein preferably has good acrylic type resin such as the transparency, weatherability, thermotolerance is the bonding agent of base polymer.
Though do not do special the qualification as acrylic type resin, what preferably use is (methyl) acrylic ester type base polymer and the copoly type base polymer that contains this wherein two or more (methyl) acrylic ester of (methyl) butyl acrylate, (methyl) ethyl acrylate, (methyl) Isooctyl acrylate monomer, (methyl) acrylic acid 2-ethylhexyl ester appearance.Better is that copolymerization has polar monomer in these base polymers.Can enumerate out (methyl) acrylic acid, (methyl) acrylic acid 2-hydroxy propyl ester, (methyl) acrylic acid 2-hydroxy methacrylate, (methyl) acrylic amide, 2-N as polar monomer; N-dimethylaminoethyl (methyl) acrylic ester, epoxy (methyl) acrylic ester appearance, contain the monomer of carboxyl, hydroxyl, amido, amino and epoxy radicals etc.
As acrylic-type adhesive binder, can use separately, also can also use with common crosslinking chemical.As crosslinking chemical, enumerated and can contain divalent or polyvalent metal ion, form the carboxylic metallic salt material between itself and carboxyl; Or contain polyamine compounds, and form the material of amido link between carboxyl; Or contain polyepoxides and polyol compound, form the material of ester bond between itself and carboxyl; Or contain polyisocyanate compounds, form the compound of amido link etc. between itself and carboxyl.This wherein, polyisocyanate compounds is widely used as organic crosslinking agent.
Energy line constrictive type bonding agent is meant the character with the ultraviolet ray of receiving or electronics line homenergic line irradiation after-hardening, before the energy line irradiation, has the viscosity close attachment on lining lids such as film, hardens because of the irradiation of energy line and can adjust its sticking close property.In addition, when adhesive phase uses the constrictive type bonding agent, mean that adhesive phase is by the formed layer of the hardening thing of constrictive type bonding agent among the present invention.As energy line constrictive type bonding agent, preferably use UV cured type bonding agent.Energy line constrictive type bonding agent is a principal ingredient with acrylic-type adhesive binder and energy line polymerizable compound generally.Usually cooperate with crosslinking chemical again, also can be used when needing with Photoepolymerizationinitiater initiater or light sensitizer.
In for the employed adhesive composition of formation adhesive phase; Except above-mentioned base polymer and the crosslinking chemical; Can also be the bounding force, cohesiveness, viscosity, elastic modulus, glass temperature etc. of adjustment bonding agent as required; Can also cooperate some proper additive, for example natural or synthetic resene, give fusible resin, prevent oxygenant, dyestuff, pigment, foam-breaking agent, mordant, Photoepolymerizationinitiater initiater etc.Even can also add particulate, can be made into the adhesive phase of display light scattering property.In adhesive phase, also can cooperate antioxidant or ultraviolet light absorber etc. in addition.In ultraviolet light absorber, contain benzophenone cpd or salicylate compound, benzotriazole compound, alpha-cyanoacrylate ester compounds, nickel complex salt compound etc.
The rete 7 of peeling off that constitutes Polarizer among the present invention is release liners that laser high-absorbility film constitutes, by constituting greater than 2% film usually in the excitation wavelength range inner laser average absorption rate of institute's irradiating laser.Use the common release liner of blooming can use for example polyester film and polyethylene terephthalate film etc.
In addition; With the substrate 8 of peeling off the display device that the Polarizer of rete 7 after being stripped from fit are flat board members such as the glass substrate in display device such as liquid crystal indicator, plasma display system, used, synthetic resin substrate, also can be the substrate that forms by component parts such as preparation liquid crystal cells, electrodes.The shape of substrate is general, and what use is shape such as square or rectangular.
Be used for cutting off the laser aid of banded Polarizer among the present invention, can use generally well-known infrared laser, for example carbon dioxide laser, YAG laser, UV laser etc.But in order to reduce breaking or being short of of section, and, recommend to use carbon dioxide laser for the ease of operation.
Use the speed of laser cutting need to receive to cut off the influence of thickness of the banded Polarizer of processing, if the thickness of Polarizer is at 70～500 mu m ranges, then speed is preferably 5～60m/ branch more than 1m/ divides.If cut-off velocity does not reach the 1m/ branch, then productivity is relatively abominable.In addition, the output of infrared laser is because of the decision of factors such as the thickness of polarisation and desirable cut-off velocity, but uses the scope of 10W～40W usually.Employed optical maser wavelength among the present invention; Because of the object that cuts off among the present invention has only a side of polarisation; And for containing the cambial Polarizer of irradiating laser low absorptivity film; Be slim especially banded Polarizer, it cuts off the optical maser wavelength of recommending in the processing to use is at the employed wavelength of 9.4 μ m thickness.Optical maser wavelength cut-out with such adds man-hour, cuts off processing with the optical maser wavelength of using 10.6 μ m and compares, and the cut-out end face is beautiful.
Laser cut off is with such, such as among Fig. 3 record, constitute the layer from the surface protection rete to layer 5 position that constitute by the laser low absorptivity of banded Polarizer.This cut-out only stays peels off rete 7; And layer 5 that is made up of laser low absorptivity film and adhesive phase 6 positions are when being cut off; The light absorpting ability of the layer 5 that reason laser low absorptivity film constitutes is low, with the very difficult precision (cutting off the adjustment of the degree of depth) that guarantees its cut-out of laser, under a lot of situation; Stripping film also is cut off, and uses hemisect also to be difficult to reach expectation.In addition, even the hemisect success, because the resin fusion forms bulk, the Polarizer after cutting off is peelled off peel ply, when fitting with substrate 8, in the sticking part generation disengaging of substrate and Polarizer, can not combine closely equably.
Among the present invention, the layer of layer before 5 that constitutes by laser low absorptivity film with cut, and then cut off with cutting machine, and remainder is peeled off rete 7.When using cutting machine to cut off fully; Surface protection film 4 occurs breaking away from or bonding agent spills, even the life-span of cutting machine is significantly shortened, yet adopts method of the present invention; Can improve these and produce consumption; To compared with only cutting banded Polarizer with laser, the Polarizer that the protective film that has significant difference for laser absorption rate and laminations such as peeling off rete form is if will only stay the technology that the rete requirement has high complexity of peeling off; The present invention adopts two-step approach, has just solved the problem of above-mentioned existence with very simple method.
Cutting machine as cutting off laser low absorptivity film cambium layer 5 and adhesive phase can use the normally used cutting machine in the blooming field, for example give as security cut type cutting machine, wheel type cutting machine and fixedly quilt such as circular blade and revolution circular blade enumerate.Recommend to use the blade of lower dead point position adjustment part material with the rotating shaft that drives blade and the lower dead point position of adjusting blade about these blades.In this case, lower dead point position adjusted to peel off below 0.5 times of rete 7 thickness, can accurately stay stripping film 7 and the layer 5 that only is made up of laser low absorptivity film and adhesive phase are cut off along vertical vertical direction.
In addition; Output wavelength scope (9.2～10.8 μ m) in carbon dioxide laser; Measured the average absorption rate of applied representative film in the Polarizer, three cellulose acetate membrane (TAC film): polyvinyl alcohol resin film (PVA film) 13%: poly terephthalic acid monoethylene glycol film (PET film) 6%: cyclo-olefin-polymer films (COP film) 8%: polymethyl methacrylate film (PMMA film) 0.3%: polypropylene screen (PP film) 0.8%: 0.7%.
More than, according to the Polarizer that the method for the present invention that is described in detail is cut off by desirable shape, after will peeling off rete 7 and peeling off, be fitted on the substrate 8 of liquid crystal display etc.This operation such as Fig. 1 or shown in Figure 2; The banded film of lamination is become cylindric by package; This cylindric film is along vertical expansion; When corresponding length according to substrate with vertical vertical section and substrate is launched; Comprise only stay the above-mentioned diaphragm that cuts off operation, will cut out through this cut-out of peeling off the rete direction cut-out that above-mentioned banded Polarizer and above-mentioned adhesive layer is longitudinally vertical from above-mentioned peel off separation circuit that rete separates, with above-mentioned diaphragm and faying face conveyance to the substrate of peeling off rete and with the bonding process of baseplate-laminating, recommend to use can be on fitting continuously on the ready substrate Polarizer laminating apparatus of Polarizer.
[embodiment]
Below be based on embodiment to the more detailed explanation of the inventive method.
[structure of Polarizer]
Banded Polarizer has in the present embodiment used the Polarizer that has structure as shown in Figure 1 in fact.The thickness that promptly in polyvinyl alcohol (PVA), adsorbing orientation has iodine is that the two sides of the polarizing layer that film constituted 1 of 25 μ m is that thickness is the polarisation protective film 2 of the three cellulose acetate membrane formation of 80 μ m, fits through the adhesive layer that the WS that contains polyvinyl alcohol (PVA) and water-soluble epoxy resin constitutes; Then on the polarisation protective film 2 that three cellulose acetate membrane constitutes; For ease of when using operation, preventing to abrade or dust and play the pressure-sensitive propylene type adhesive phase 3 of protection purpose through 20 μ m thickness, the surface protection film 4 that constitutes by the polyethylene terephthalate film that the last 40 μ m that fit are thick; Layer 5 (the following additional functional layer 5 that is designated as sometimes) that constitute by cycloolefin resin film that 70 μ m are thick on the adhesive agent that the another side of polarizing layer 1 constitutes through the WS that contains polyvinyl alcohol (PVA) and water-soluble epoxy resin is fitted (trade name: ZEONOR, Japanese ZEON Co., Ltd. system); At it simultaneously is the acrylic pressure sensitive adhesives layer 6 of thick 25 μ m; Be the stripping film 7 of the polyethylene terephthalate film of thick 38 μ m above that, two layers banded Polarizer (size: 1m * 1m) is ready to fit like this.
[embodiment 1]
To above-mentioned banded Polarizer; Using optical maser wavelength is the carbon dioxide laser (laser irradiation device: U.S. Coherent corporate system) of 9.4 μ m; With respect to the Polarizer absorption axes is the right angle; Cut-out is (till surface protection rete, adhesive phase, polarisation protective film, polarizing layer, the adhesive layer) (cut-out condition: frequency 20kHz, output power: 59W, speed: 60m/min) till the layer before 5 from the surface protection rete of Polarizer to the function extra play; Then use fixedly dise knife (20 ° of
knife edge angles; Thickness 0.3mm; Hagihara Industries Inc.'s system), cuts off function extra play 5 and adhesive phase 6, only stay and peel off rete 7.The microphotograph that the Polarizer that obtains like this cuts off section is shown in Figure 5.In addition, the two step processes of chopping that add fixing dise knife with this laser (optical maser wavelength 9.4 μ m) to 150 pieces of Polarizers cut off handle after, observed the fixedly blade of dise knife, blade does not occur turnedly as a result, does not observe the obvious decline of cut-out ability yet.
[comparative example 1]
For same banded Polarizer used in embodiment 1,, only stay with the rete 7 of peeling off of baseplate-laminating face and implemented rupturing operation only with used dise knife among the embodiment 1.The microphotograph of the cut Polarizer section that the enforcement beginning is the 10th time is as shown in Figure 6.
Like the clear demonstration of Fig. 6, dise knife cuts off under the situation of banded Polarizer only using fixedly, has found to break away between polarisation protective film and the surface protection rete at the 10th time cut-out section.The 10th the fixedly sharpness deterioration of dise knife,, find breach in addition, be difficult to continue again to use at the edge of a knife of dise knife like Fig. 7 and shown in Figure 8.
Symbol description
1, polarizing layer 2, polarisation protective film
2a, polarisation protective film 3, adhesive phase
4, surface protection rete 5, by laser low absorptivity film constitute the layer
6, adhesive phase 7, peel off rete
8, substrate
Claims (7)
1. the manufacturing approach of a Polarizer comprises:
In the one side of the polarizing layer that is made up of polyvinyl alcohol resin film, lamination has the polarisation protective film that is made up of laser high-absorbility film;
At the face opposite of this polarisation protective film, the surface protection rete that is made up of laser high-absorbility film is arranged through the adhesive phase lamination with polarizing layer;
At the another side of polarizing layer, the layer that is made up of laser low absorptivity film is arranged through the adhesive layer lamination; And,
At the face opposite of this laser low absorptivity rete with polarizing layer, have by what laser high-absorbility film constituted through the adhesive phase lamination and to peel off rete, and the banded Polarizer that forms,
For said banded Polarizer, only stay and peel off rete, and cut off other formation layer that constitutes Polarizer,
Be cut to the layer layer before that constitutes by laser low absorptivity film with laser from the surface protection rete, then cut off the layer that constitutes by laser low absorptivity film with cutting machine.
2. method according to claim 1, wherein, laser low absorptivity film be the average absorption rate of laser at the film below 2%, laser high-absorbility film is that the average absorption rate of laser surpasses 2% film.
3. method according to claim 2, wherein, laser low absorptivity film is that the average absorption rate of laser is at the film below 1%.
4. method according to claim 1 and 2, wherein, the polarisation diaphragm that between the layer of polarizing layer and laser low absorptivity film formation, has laser high-absorbility film to constitute.
5. according to any one described method in claim 1 or 2, wherein, laser low absorptivity film is cycloolefine polymer film, polypropylene screen or polymethyl methacrylate film.
6. according to any one described method in claim 1 or 2, wherein, laser is carbon dioxide laser.
7. Polarizer is according to any one described method manufacturing in the claim 1～6.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009183162 | 2009-08-06 | ||
| JP2009-183162 | 2009-08-06 | ||
| PCT/JP2010/063439 WO2011016572A1 (en) | 2009-08-06 | 2010-08-02 | Method for manufacturing polarizing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102282485A CN102282485A (en) | 2011-12-14 |
| CN102282485B true CN102282485B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800049412A Active CN102282485B (en) | 2009-08-06 | 2010-08-02 | Method for manufacturing polarizing plate |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4743339B2 (en) |
| KR (1) | KR101102159B1 (en) |
| CN (1) | CN102282485B (en) |
| TW (1) | TWI367353B (en) |
| WO (1) | WO2011016572A1 (en) |
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| WO2012014602A1 (en) * | 2010-07-29 | 2012-02-02 | コニカミノルタオプト株式会社 | Long roll of polarizing plate and optical display device manufacturing system |
| JP5481300B2 (en) * | 2010-07-29 | 2014-04-23 | 住友化学株式会社 | Polarizing plate cutting method and polarizing plate cut by the method |
| SG191204A1 (en) | 2010-12-30 | 2013-07-31 | 3M Innovative Properties Co | Laser cutting method and articles produced therewith |
| WO2013077353A1 (en) * | 2011-11-21 | 2013-05-30 | 住友化学株式会社 | Optical member laminate manufacturing system, manufacturing method, and recording medium |
| US20150085217A1 (en) * | 2012-05-01 | 2015-03-26 | Konica Minolta, Inc. | Retardation film, process for producing polarizer, and liquid-crystal display device |
| KR102031401B1 (en) * | 2012-08-08 | 2019-10-11 | 스미또모 가가꾸 가부시키가이샤 | Method for producing and system for producing optical display device |
| WO2014097885A1 (en) * | 2012-12-18 | 2014-06-26 | 住友化学株式会社 | Manufacturing method for optical display device and manufacturing system for optical display device |
| JP6318465B2 (en) * | 2013-03-26 | 2018-05-09 | 住友化学株式会社 | Resin film, polarizing plate using the same, and method for cutting resin film |
| CN104730609B (en) * | 2013-12-20 | 2019-06-04 | 昆山国显光电有限公司 | A kind of polaroid and the panel display apparatus and preparation method thereof using the polaroid |
| KR101683649B1 (en) | 2015-01-27 | 2016-12-07 | 현대자동차주식회사 | Personalized displaying system for varying and integrating car contents, method for managing car contents the smae, and computer readable medium for performing the same |
| JP6647753B2 (en) | 2015-04-17 | 2020-02-14 | 日東電工株式会社 | Polarizing plate and manufacturing method thereof |
| JP6623474B2 (en) * | 2016-03-28 | 2019-12-25 | 北川工業株式会社 | Heat conductive member, method for manufacturing heat conductive member, and heat conductive structure |
| JP6922899B2 (en) * | 2016-04-28 | 2021-08-18 | 日本ゼオン株式会社 | Optical film manufacturing method |
| JP6887759B2 (en) * | 2016-05-17 | 2021-06-16 | 日東電工株式会社 | An optical laminate and a method for manufacturing an optical film piece using the optical laminate |
| JP6792367B2 (en) * | 2016-07-22 | 2020-11-25 | 日東電工株式会社 | Single-wafer optical film |
| JP6814459B2 (en) * | 2016-07-28 | 2021-01-20 | 三星ダイヤモンド工業株式会社 | Laser processing method |
| KR102558815B1 (en) * | 2016-08-08 | 2023-07-21 | 동우 화인켐 주식회사 | Optical Film and Polarizing Plate Comprising the Same |
| CN106092919B (en) * | 2016-08-09 | 2018-10-19 | 东莞市卓越新材料科技有限公司 | A kind of aluminum plastic film material tests method |
| TWI613471B (en) * | 2016-12-21 | 2018-02-01 | 住華科技股份有限公司 | Polarizer assembly and display apparatus |
| WO2019112000A1 (en) * | 2017-12-07 | 2019-06-13 | 住友化学株式会社 | Method for cutting and method for manufacturing laminate film |
| JP7260993B2 (en) * | 2017-12-07 | 2023-04-19 | 住友化学株式会社 | LAMINATED FILM CUTTING METHOD AND MANUFACTURING METHOD |
| JP2018112754A (en) * | 2018-03-22 | 2018-07-19 | 住友化学株式会社 | Resin film, polarizing plate using the same, and cutting method of resin film |
| WO2019202992A1 (en) * | 2018-04-19 | 2019-10-24 | 東洋紡株式会社 | Polyester film for surface protection film of foldable display and use thereof |
| CN108581189B (en) * | 2018-06-01 | 2020-04-17 | 业成科技（成都）有限公司 | Laser cutting method |
| TWI824051B (en) * | 2018-11-02 | 2023-12-01 | 日商日東電工股份有限公司 | Laser cutting processing method of polarized optical functional film laminate |
| JP6792660B2 (en) * | 2019-03-04 | 2020-11-25 | 住友化学株式会社 | Optical laminate and its manufacturing method |
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| TW201118437A (en) | 2011-06-01 |
| JP2011053673A (en) | 2011-03-17 |
| TWI367353B (en) | 2012-07-01 |
| KR20110089375A (en) | 2011-08-05 |
| WO2011016572A1 (en) | 2011-02-10 |
| KR101102159B1 (en) | 2012-01-02 |
| CN102282485A (en) | 2011-12-14 |
| JP4743339B2 (en) | 2011-08-10 |
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