CN101573642A - Optical film, polarizing plate and image display device - Google Patents
Optical film, polarizing plate and image display device Download PDFInfo
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- CN101573642A CN101573642A CNA2007800427255A CN200780042725A CN101573642A CN 101573642 A CN101573642 A CN 101573642A CN A2007800427255 A CNA2007800427255 A CN A2007800427255A CN 200780042725 A CN200780042725 A CN 200780042725A CN 101573642 A CN101573642 A CN 101573642A
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Abstract
An optical film is provided as a protection film for a polarizer. The optical film has excellent transparency with less haze, excellent optical characteristics such as a small birefringence, and excellent mechanical strength, heat resistance and moisture permeability. A polarizing plate using such film on one surface or the both surfaces of the polarizer as a protection film, and an image display device using such polarizing plate are also provided. The optical film is composed of a polypropylene resin synthesized by a metallocene catalyst.
Description
Technical field
The present invention relates to polarizer diaphragm with blooming, use this film to be the polaroid of diaphragm and the image display device that uses this polaroid on the single face or the two sides of the polarizer; described polarizer diaphragm has good optical characteristics such as mist degree is little, the transparency is good, birefringence is little with blooming; and have excellent mechanical intensity and thermotolerance, moisture-penetrability is good.
Background technology
Polaroid is the material with following function: only see through the light with certain vibration direction, shield other light, for example be widely used as one of parts that constitute liquid crystal indicator.As such polaroid, use goods usually with the structure that forms by the polarizer and diaphragm lamination.The above-mentioned polarizer has following function: only see through the light with certain vibration direction, for example, use stretching polyethylene alcohol (below, be designated as " PVA " sometimes) film etc. usually, again the film that forms by dyeing such as iodine, dichroic dyes.In addition, also use the polarizer of application type recently.
Said protection film is being undertaken following function: the protection polarizer, give practical intensity to whole polaroid, and for example use cellulose family films such as cellulose triacetate (below, be designated as " TAC " sometimes) film usually.Because optical homogeneity excellences such as the cellulose family film transparency is good, birefringence is little have practical thermotolerance and excellent mechanical intensity, therefore have excellent characteristic as polarizer diaphragm.
In addition, the cellulose family film is because the moisture permeability height, and when fitting with the polarizer such as PVA, therefore excellent processability such as the moisture permeability of PVA, cementing agent is good uses (for example, referring to Patent Document 1) as polarizer diaphragm usually.
But because cellulose family film (for example TAC film) water absorptivity height, exist polarizer performance reduce, because of the problems such as dimensional stability due to the suction.
In order to address this problem; someone attempts by using the ratio low membrane material of TAC film water-intake rate in the past to improve dimensional stability as polarizer diaphragm; but the polycarbonate membrane that water absorptivity is low, the photoelastic constant of polyethylene terephthalate film are big; because the effect of external stress causes the variation of phase differential, the problem that exists the polaroid performance to reduce.
So, disclose the film moisture permeability low, (for example, refer to Patent Document 2 through the high density polyethylene or the polypropylene screen of unilateral stretching as polarizer diaphragm.)。
But in the tygon of unilateral stretching or polypropylene, there is following problems: produce phase differential, reduce as the function of polaroid.
Patent documentation 1: the spy opens flat 7-120617 communique
Patent documentation 2: special fair 6-12362 communique
Description of drawings
[Fig. 1] is the mode chart of expression polaroid manufacturing step of the present invention.
[Fig. 2] has the mode chart of structure example of the liquid crystal cell of polaroid of the present invention for expression.
[Fig. 3] has the mode chart of structure example of the resistive film mode touch pad (glass/glass type) of polaroid of the present invention for expression.
[Fig. 4] has the mode chart of structure example of the resistive film mode touch pad (glass/membranous type) of polaroid of the present invention for expression.
Symbol description
1: molten resin (PP)
2: optical element
3: the polarizer
4: diaphragm (blooming)
5: adhesive layer
6: liquid crystal cell
7: polaroid
8: polarizer (birefringent layers)
9: the polaroid of touch pad
10: antireflection film
11: λ/4 plates
12: the diaphragm of the polarizer [on]
12 ': the diaphragm of the polarizer [descending]
13: the polarizer (PVA)
14: glass
The 15:ITO diaphragm
16: the diaphragm of the polarizer [outer down]
17: the polaroid of touch pad
Summary of the invention
The problem that invention will solve
In view of the above problems; the object of the present invention is to provide polarizer diaphragm with blooming, use this film to be the polaroid of diaphragm and the image display device that uses this polaroid on the single face or the two sides of the polarizer; described polarizer diaphragm has good optical characteristics such as mist degree is little, the transparency is good, birefringence is little with blooming; and have excellent mechanical intensity and thermotolerance, moisture-penetrability is good.
The method of dealing with problems
To achieve these goals, present inventors found that by the blooming by the synthetic polypropylene-based resin of metalloscene catalyst to be suitable as polarizer diaphragm through concentrating on studies, have solved the problems referred to above.
That is to say, the present invention includes:
[1] a kind of polarizer diaphragm blooming, it is by making by the synthetic polypropylene-based resin of metalloscene catalyst.
[2] above-mentioned [1] described blooming, wherein, the modulus of elasticity in static bending of described polypropylene-based resin is more than the 700MPa.
[3] above-mentioned [1] or [2] described blooming, wherein, the melt flow rate (MFR of described polypropylene-based resin; According to JIS K7210, the measured value under 230 ℃, 2.16kg heavy burden condition) be more than 20g/10 minute.
[4] each described blooming in above-mentioned [1]～[3], wherein, described blooming is a unstretching film.
[5] each described blooming in above-mentioned [1]～[4], wherein, with respect to the described polypropylene-based resin of 100 mass parts, this blooming also contains the dibenzylidene sorbitol class additive of 0.03～0.5 mass parts.
[6] each described blooming in above-mentioned [1]～[5], wherein, the phase differential Rth of the thickness direction of described blooming is 20～60nm.
[7] a kind of polaroid wherein, forms each described blooming in above-mentioned [1]～[6] in the one side at least of the polarizer.
[8] a kind of image display device, the described polaroid of its use above-mentioned [7].
The effect of invention
Blooming of the present invention has good optical characteristics such as mist degree is little, the transparency is good, birefringence is little, and moisture-penetrability is good.And various good endurance such as thermotolerance, humidity resistance have no effect to the optical property of polaroid, can improve the degree of polarization of polaroid, and soft, springiness.In addition, because blooming of the present invention has resistibility to impact, distortion from the outside, by fitting on the polarizer, the intensity of liquid crystal display cells that can be improved significantly, the polaroid of reliability.
In addition, compare with widely used TAC film in the past, blooming of the present invention has equal above defencive function.Especially the TAC film is a hydrophilic film, does not have moisture resistance substantially, by contrast, because blooming of the present invention is a hydrophobic film, can significantly improve the permanance of polaroid.
Embodiment
Blooming of the present invention is characterised in that by making by the synthetic polypropylene-based resin of metalloscene catalyst.
The resin of the polypropylene-based resin that the present invention uses for synthesizing by the aftermentioned metalloscene catalyst, the multipolymer of preferred propylene and alpha-olefin.As alpha-olefin, can use ethene, carbon number is 4～18 1-alkene, specifically can enumerate ethene, 1-butylene, 1-amylene, 1-hexene, 1-octene, 1-heptene, 4-methyl-amylene-1,4-methyl-hexene-1,4,4-dimethyl pentene-1 etc.The ratio of propylene units is preferably 80 moles more than the % in the multipolymer, and comonomer is 20 moles below the %.As comonomer, above-mentioned alpha-olefin is not limited to a kind, can use more than 2 kinds, and multipolymer also can be multiple copolymers such as terpolymer.
The metalloscene catalyst that the present invention uses can be active site (active site) single-site catalysts (シ Application グ Le サ イ ト catalyst) uniformly, also can be the uneven multicenter catalyzer of active site (マ Le チ サ イ ト catalyst), wherein preferred multicenter catalyzer.Usually, can use 4～6 group transition metal compounds, especially 4 group transition metal compounds such as Zr, Ti, Hf and have cyclopentadienyl group or the organo-transition metal compound of cyclopentadienyl derivative group.
As the cyclopentadienyl derivative group, can use alkyl substituents such as pentamethyl cyclopentadienyl group or constitute saturated or the substituent group of unsaturated cyclic in conjunction with 2 above substituting groups, can enumerate typical example, the partial hydrogenation thing of indenyl, fluorenyl, Azulene base (ア ズ レ ニ Le base) or these groups.In addition, also can enumerate, a plurality of cyclopentadienyl groups are by the group in conjunction with formation such as alkylidene, silicylene, methylene germane base.
As promotor, can use and be selected from aluminium-oxygen base compound (ア Le ミ ニ ウ system オ キ シ compound), can make the Metallocenic compound composition change at least a compound in cationic ionic compound or lewis acid, solid acid or the ion exchangeable phyllosilicate into Metallocenic compound reaction.In addition, also can be added with machine aluminium compound in case of necessity with these compounds.
Above-mentioned phyllosilicate is meant the silicate compound with following crystal structure, and described crystal structure is to make the face that constitutes by ionic link etc. to each other with parallel overlapping formation of faint bonding force.The preferred phyllosilicate of the present invention is the phyllosilicate of ion exchangeable.Here, ion exchangeable is meant that the interlayer cation of phyllosilicate can exchange.Most of phyllosilicate mainly originates from nature with the form of the principal ingredient of clay mineral, but these phyllosilicates are not particularly limited to natural prodcuts, can also be artificial composite.
Concrete example as phyllosilicate, as long as be known phyllosilicate, be not particularly limited, can enumerate, dickite, carnat, porcelain earth, Silicon-rich porcelain earth (ア ノ one キ サ イ ト), halloysite (メ Ha ロ イ サ イ ト), the contour mountain range of halloysite Tu; Serpentine families such as chrysotile (Network リ ソ イ Le), lizardite (リ ザ Le ダ イ ト), lobate serpentine; Smectite, zaukonite (ザ ウ コ Na イ ト), beidellite, nontronite, saponite, taincolite (テ ニ オ ラ イ ト), hectorite, humite smectite families such as (ス チ one Block Application サ イ ト); Vermiculite families such as vermiculite; Mica families such as mica, illite, sericite, glauconite; Aminanthine; Sepiolite (セ ピ オ ラ イ ト); Polygorskite; Bentonitic clay; Pyrophyllite; Talcum powder; The chlorite group.These phyllosilicates can form mixolimnion.
Wherein, smectite family, vermiculite family, mica families such as preferred smectite, zaukonite, beidellite, nontronite, saponite, hectorite, humite, bentonitic clay, taincolite.
These phyllosilicates can carry out chemical treatment.Here said chemical treatment can be adopted following any processing: remove surface attachment impurity surface treatment and to the crystal structure of phyllosilicate, the processing that chemical composition is brought influence.Specifically can enumerate, (i) acid treatment, (ii) alkali treatment, (iii) salt handle, (iv) organism processing etc.These processing can remove impurity, the exchange interlayer on surface kation, make kation strippings such as Al, Fe in the crystal structure, Mg, its result, form ion complex, molecular complex, organic derivative etc., can change surface area, interfloor distance, solid acid degree etc.These processing can be carried out separately, also can be with treatment combination more than 2 kinds.
As method (polymerization) by the synthetic polypropylene-based resin of above-mentioned metalloscene catalyst, in the presence of these catalyzer, can enumerate, use the slurry process of non-active solvent, in fact do not use the vapor phase method, solwution method of solvent or with polymerization single polymerization monomer as the mass polymerization of solvent etc.
In addition, the preferred modulus of elasticity in static bending of polypropylene-based resin of the present invention is more than the 700MPa, more preferably more than the 900MPa.The modulus of elasticity in static bending is in above-mentioned scope the time, and blooming can obtain full intensity, can easily carry out following process.
In addition, the preferred melt flow rate of polypropylene-based resin of the present invention (below, be designated as MFR sometimes) for more than 20g/10 minute, expectation is 20～40g/10 minute.Herein, MFR is the value of measuring according to JIS K7210, and its condition determination is 230 ℃, 2.16kg heavy burden.The MFR of polypropylene-based resin is in above-mentioned scope the time, and blooming can obtain full intensity, and following process can easily be carried out.And, owing to can not cause resin distortion, therefore be difficult for producing phase differential, in addition, in making batch, MFR is easy to stablize, but therefore stable formation, because therefore the addition of adjuvants such as may command MFR correctives can not produce harmful effect to rerum natura.The adjusting of the MFR of polypropylene-based resin can utilize common MFR correctives etc. to carry out.
The preferred fusing point of polypropylene-based resin of the present invention (Tm) is more than 130 ℃.If fusing point (Tm) is more than 130 ℃, when then adopting unstretching film, the modulus of elasticity in static bending increases, and blooming intensity increases, and following process is not had influence, and is therefore preferred.
In addition, this polypropylene-based resin also preferred tensile strength be more than the 20MPa.Pulling strengrth is 20MPa when above, when being fitted on the polarizer by adhesive layer with the method for roll-to-roll (roll to roll) blooming, can not be orientated, and blooming does not produce phase differential yet, therefore can keep the performance of polaroid.
In addition, in the present invention,, also can add adjuvant in order to improve pulling strengrth and to improve the transparency.As adjuvant, preferably to the little dibenzylidene sorbitol class additive of phase differential influence.
The dibenzylidene sorbitol class additive that the present invention uses can preferably use 1,3-2,4-dibenzylidene sorbitol, 1,3-2, the additive that two replacement dibenzylidene sorbitols such as two pairs of methyl of 4-, two benzal D-sorbites and two replacement benzal D-sorbites and the cooperation of two fatty acid monoglycerides form etc.
Known dibenzylidene sorbitol class additive helps to improve the transparency and the intensity of acrylic resin as the transparence nucleator, but finds in the present invention, when using it for polarizer diaphragm and using blooming, phase differential is not had influence substantially.
In above-mentioned dibenzylidene sorbitol class additive, the nucleating agent dibenzylidene sorbitol that seepage is few, stable and added two fatty acid monoglycerides is used in expectation.As two fatty acid monoglycerides, preferred Sunsoft Q 12D, two monomyristins, two glyceryl monostearates etc. can use separately, also it can be mixed and use.
With respect to 100 mass parts acrylic resins, preferred above-mentioned content of additive is the scope of 0.03～0.5 mass parts.Above-mentioned content of additive is 0.03 mass parts when above, can improve the transparency and fully improve intensity.On the other hand, even add to surpass the above-mentioned adjuvant of 0.5 mass parts, also possibly can't further improve the transparency, intensity, be disadvantageous from the angle of cost.
In addition, when especially using the two replacement benzal D-sorbites that added two fatty acid monoglycerides, with respect to 100 mass parts acrylic resins, preferred two amounts that replace the benzal D-sorbite are 0.01～0.3 mass parts, and the amount of two fatty acid monoglycerides of mixing is 0.01～0.2 mass parts.
Need to prove,, in the scope of not damaging the necessary transparency, also can cooperate various olefin resins, adjuvant in the blooming of the present invention according to the desired rerum natura of gained film.
As olefin resin, can be in the scope that is no more than 10 quality % mixed with little amount with the synthetic HOPP of Zeigler catalyst, random polypropylene etc.
In addition, as adjuvant, can enumerate, for example, improved weathering agent, mar proof improving agent, polymerization inhibitor, crosslinking chemical, infrared absorbent, antistatic agent, cohesiveness improving agent, levelling agent, thixotropy imparting agent, coupling agent, surfactant, polyelectrolyte, electric conductivity complex compound, antiblocking agent, slipping agent, plastifier, defoamer, filling agent, solvent etc.
Here, as the improved weathering agent, can use ultraviolet light absorber, light stabilizer.
Ultraviolet light absorber can be any in mineral-type, the organic class, and as the mineral-type ultraviolet light absorber, can preferably use mean grain size is titania, cerium oxide, zinc paste about 5～120nm etc.In addition, as organic class ultraviolet light absorber, for example, benzotriazole, specifically can enumerate, 3-[3-(benzotriazole-2-the yl)-5-tert-butyl-hydroxy phenyl of 2-(2-hydroxy-5-methyl base phenyl) benzotriazole, 2-(2-hydroxyl-3,5-di-tert-pentyl-phenyl) benzotriazole, polyglycol] propionic ester etc.
In addition, as light stabilizer, for example hindered amines specifically can be enumerated, two (1,2,2,6,6-pentamethyl-4-piperidyl) 2-(3, the 5-di-tert-butyl-4-hydroxyl benzyl)-2 '-n-butylmalonic acid ester, two (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, four (2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butane tetracarboxylic acid esters etc.
Need to prove,, also can use in the molecule reactive ultraviolet light absorber or light stabilizer with polymerizable groups such as (methyl) acryloyl groups as ultraviolet light absorber or light stabilizer.
As the mar proof improving agent, can enumerate spherical particles such as Alpha-alumina as inorganics, silicon dioxide, porcelain earth, iron oxide, adamas, silit.Shape of particle can be enumerated ball, ellipsoid, polyhedron, scale shape etc., is not particularly limited, and is preferably spherical.Organism can be enumerated, synthetic resin pearls such as crosslinked acrylic resin, polycarbonate resin.Particle diameter is generally about 30～200% of blooming thickness.Wherein preferred especially spherical Alpha-alumina, because its hardness height has positive effect to improving mar proof, in addition, spherical particle is easier to obtain.
As polymerization inhibitor, can use for example p-dihydroxy-benzene, 1,4-benzoquinone, hydroquinone monomethyl ether, pyrogallol, tert-butyl catechol etc., as crosslinking chemical, for example can use polyisocyanate compound, epoxy compound, metal-chelating compounds, nitrogen heterocycle propane compound, oxazoline compound etc.
As filling agent, can use for example barium sulphate, talcum, clay, lime carbonate, aluminium hydroxide etc.
As infrared absorbent, can use for example dithiols metal complex (ジ チ オ one Le is a Jin Shu Wrong body), phthalocyanine-like compound, diimmonium (ジ イ Application モ ニ ウ system) compound etc.
Can add various adjuvants in the blooming to give its various functions, for example, have high rigidity and have mar resistance so-called hard conating function, antifogging coating function, nonpolluting coating function, Anti Glare Coatings function, anti-reflection coating function, block ultraviolet ray and be coated with layer function, block infrared coating function etc.
[manufacture method of blooming]
Below, just the manufacture method of blooming of the present invention describes.
Blooming can be by extruding above-mentioned polypropylene-based resin and adopt following various forming process directly to make (with reference to figure 1) on the polarizer, and described forming process comprises the method that is coated with shaping, The tape casting, T pattern extrusion molding method, blow moulding, injection molding method etc.In addition, also can fit on the polarizer by adhesive layer again with behind the above-mentioned various forming processes making bloomings 4.
In the present invention, be not orientated the T pattern extrusion molding that therefore preferred employing needn't stretch owing to be desirably in the blooming of making on the polarizer.
The thickness of blooming is preferably the scope of 10～200 μ m, more preferably 30～150 μ m.This thickness is 10 μ m when above, can fully guarantee as polarizer protection film strength, and this thickness is 200 μ m when following, can obtain flexiblely fully, in addition, because lightweight, so be easy to processing, and also is favourable from the angle of cost.
The method of directly making blooming on the polarizer as shown in Figure 1.In Fig. 1, coating adhesive layer 5 on the polarizer 3 is made film (Fig. 1, left figure) with extrusion molding with polyacrylic molten resin 1 in advance.Acrylic resin behind the system film solidifies, and forms diaphragm 4.
Can also pass through T pattern manufactured diaphragm 4 in advance, be coated with adhesive layer 2 in advance, fit with the polarizer 3.
Consider and situation about being used in combination as the TAC of polarizer diaphragm purposes, the Rth that wishes the phase differential Rth of blooming of the present invention on thick direction and the TAC film (thick 80 μ m) that in the past used be 45nm about equally.In order to be used for polarizer diaphragm purposes, the phase differential Rth of blooming on thick direction is preferably 20～60nm scope, more preferably 20～50nm scope.Can be according to the Rth of the TAC that is used in combination, adjust film thickness so that blooming at the phase differential Rth on the thick direction in desired numerical range.
[polaroid]
Polaroid of the present invention can be the goods that are fitted with the blooming of the invention described above at the single or double of the polarizer.Herein, this blooming and polarizer bonding, the function of performance diaphragm.
As the polarizer that uses in the polaroid of the present invention, as long as have following function, described function for example can be enumerated for only seeing through the light with certain vibration direction, with stretchings such as polyvinyl alcohol films, the polyvinyl alcohol polarizer that forms with dyeing such as iodine or dichroic dyes; The polyolefins polarizers such as the desalination acid treatment thing of the processed thing of polyvinyl alcohol (PVA), Polyvinylchloride; Use the reflection-type polarizer of cholesteryl liquid crystal; The film crystal film class polarizers etc. wherein preferably use the polyvinyl alcohol polarizer.
As the polyvinyl alcohol polarizer, can enumerate, for example, make dichroic substance such as hydrophilic macromolecule film absorption iodine or dichroic dye, carry out the polarizer that unilateral stretching obtains again, described hydrophilic macromolecule film comprises, polyvinyl alcohol film, part dimethoxym ethane polyvinyl alcohol film, the partly-hydrolysed film of vinyl-vinyl acetate copolymer class etc.Wherein, the preferred polarizer of making by dichroic substance such as polyvinyl alcohol film and iodine that uses.The thickness of these polarizers is not particularly limited, and is generally about 1～100 μ m.
The PVA resinoid that preferably uses as the resin that constitutes the polarizer can be by obtaining the saponification of polyvinyl acetate esters resin.As the polyvinyl acetate esters resin, except polyvinyl acetate, also can enumerate vinyl acetate and can be with the multipolymer of other monomer of its generation copolymerization etc. as the homopolymer of vinyl acetate.As can with other monomer of vinyl acetate copolymerization, can enumerate unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class etc.
The resinoid saponification degree of PVA is generally 85～100 moles of % scopes, preferred 98～100 moles of % scopes.This PVA resinoid also can further carry out modification, the polyvinyl formal that for example can use by the aldehydes modification, polyvinyl acetal etc.The resinoid degree of polymerization of PVA is generally 1,000～10,000 scope, preferred 1,500～10,000 scope.
Polaroid can prepare through for example following step: with the step of above-mentioned PVA resin film unilateral stretching; With PVA resin film dichromatism pigment dyeing, the step that makes it to adsorb this dichromatism pigment; The step of the PVA resin film of dichromatism pigment with the boric acid aqueous solution processing will be adsorbed with; The step of after boric acid aqueous solution is handled, washing; And implementing the step that these steps make the generation of dichromatism pigment adsorb applying diaphragm on the unilateral stretching PVA resin film that is orientated.
Unilateral stretching can be carried out before dyeing with the dichromatism pigment, also can carry out when dyeing with the dichromatism pigment, also can carry out after dyeing with the dichromatism pigment.When carrying out unilateral stretching after with the dichromatism pigment dyeing, this unilateral stretching can be carried out before boric acid is handled, and also can carry out in the boric acid processing procedure.In addition, can also these a plurality of stages carry out unilateral stretching.During unilateral stretching, can carry out unilateral stretching between the different roller of rotating speed, also available hot-rolling carries out unilateral stretching.In addition, can be the dry type stretching that in atmosphere, stretches, also can be the wet type stretching is promptly being undertaken stretching under the solvent swelling state by solvent.Draw ratio is generally about 4～8 times.
For the PVA resin film is dyeed with the dichromatism pigment, for example, as long as the PVA resin film is immersed in the aqueous solution that contains the dichromatism pigment.As the dichromatism pigment, specifically can use iodine or dichroic dye.
When using iodine, adopt usually the PVA resin film is immersed in the method that dyes in the aqueous solution that contains iodine or potassium iodide as the dichromatism pigment.The content of iodine is generally about 0.01～0.5 mass parts with respect to 100 mass parts water in this aqueous solution, and the content of potassium iodide is generally about 0.5～10 mass parts with respect to 100 mass parts water.The temperature of this aqueous solution is generally about 20～40 ℃, and the time of flooding in this aqueous solution was generally about 30～300 seconds.
On the other hand, when using dichroic dye, adopt usually the PVA resin film is immersed in the method that dyes in the aqueous solution that contains water-soluble dichroic dye as the dichromatism pigment.The content of dichroic dye is generally 1 * 10 with respect to 100 mass parts water in this aqueous solution
-31 * 10
-2About mass parts.This aqueous solution also can contain inorganic salts such as sodium sulphate.The temperature of this aqueous solution is generally about 20～80 ℃, and the time of flooding in this aqueous solution was generally about 30～300 seconds.
Boric acid after dyeing with the dichromatism pigment is handled to be immersed in the boric acid aqueous solution by the PVA resin film after will dyeing and is carried out.The content of boric acid aqueous solution mesoboric acid is generally per 100 mass parts water and contains about 2～15 mass parts, about preferred 5～12 mass parts.
When using iodine as the dichromatism pigment, preferably this boric acid aqueous solution contains potassium iodide.The content of potassium iodide is generally per 100 mass parts water and contains about 2～20 mass parts preferred 5～15 mass parts in the boric acid aqueous solution.The time of flooding in boric acid aqueous solution is generally 100～1, about 200 seconds, is preferably about 150～600 seconds, more preferably about 200～400 seconds.The temperature of boric acid aqueous solution is generally more than 50 ℃, preferred 50～85 ℃.
PVA resin film after boric acid is handled is washed processing usually.Washing is handled and undertaken by for example following method: the PVA resin film after boric acid is handled is immersed in the water.Carry out dried after the washing, obtain the polarizer.The temperature of water was generally about 5～40 ℃ when washing was handled, and dip time was generally about 2～120 seconds.The dried of carrying out is carried out with air drier or far infra-red heater usually subsequently.Baking temperature is generally 40～100 ℃.Processing time during dried was generally about 120～600 seconds.
Like this, can obtain by the polarizer made of PVA resin film that is adsorbed with iodine or dichroic dye and orientation.
[adhesive layer]
As the method for the applying blooming and the polarizer, as mentioned above, can be undertaken by adhesive layer.
As the cementing agent that forms adhesive layer, can enumerate, PVA class cementing agent, epoxies cementing agent, acrylic adhesive, be grafted with the polyolefin of unsaturated carboxylic acid or its acid anhydrides or be mixed with the polyolefins cementing agent etc. of this graft polyolefin.In addition, also can use cementing agent, for example cementing agent such as polyvinyl ether, rubber-like with transparency.Wherein preferred PVA class cementing agent.
PVA class cementing agent contains PVA resinoid and crosslinking chemical, as the PVA resinoid, can enumerate, with polyvinyl acetate carry out PVA that saponification obtains and derivant thereof, with can be with saponified, the modified PVA of the multipolymer of the monomer of vinyl acetate copolymerization etc., this modified PVA obtains PVA acetalation, urethane, etherificate, grafting or Phosphation etc.These PVA resinoids can be used alone or will be used in combination more than two kinds.As can with the monomer of vinyl acetate copolymerization, can enumerate unsaturated carboxylic acid such as maleic acid (acid anhydride), fumaric acid, crotonic acid, itaconic acid, (methyl) acrylic acid and alpha-olefins such as ester class, ethene or propylene thereof, (methyl) allyl sulphonic acid (sodium), sodium sulfonate (maleic acid mono alkyl ester), sodium disulfonate maleic acid Arrcostab, N hydroxymethyl acrylamide, acrylamide alkyl sulfonic acid alkali salt (ア Network リ Le ア ミ De ア Le キ Le ス Le ホ Application acid ア Le カ リ salt), N-vinyl pyrrolidone, N-vinyl pyrrolidone derivant etc.
The resinoid degree of polymerization of PVA etc. is not particularly limited, consider that from improving the cohesiveness equal angles preferably use following goods: average degree of polymerization is about 100～3000, is preferably 500～3000, average saponification degree is about 85～100 moles of %, about preferred 90～100 moles of %.
The epoxies cementing agent comprises hydrogenated epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin etc.Also can contain the compound that epoxypropane (オ キ セ Application) class or polyalcohols etc. promote cationic polymerization in the epoxy resin.
As acrylic adhesive, especially preferably based on the acrylic adhesive of the multipolymer (comprising the multipolymer that has added vinyl monomers such as vinyl cyanide, vinyl acetate, styrene) of following acrylate and following α-monoolefin carboxylic acid, because of it does not influence the polarized light property of the polarizer, described acrylate comprises butyl acrylate, ethyl acrylate, methyl acrylate, 2-EHA etc., and described α-monoolefin carboxylic acid comprises acrylic acid, maleic acid, itaconic acid, methacrylic acid, crotonic acid etc.
In addition, the polyolefin that also can use the polyolefin that is grafted with unsaturated carboxylic acid or its acid anhydrides or be mixed with this graft polyolefin is as cementing agent.As the polyolefin that is used for grafting, can enumerate, for example, low density polyethylene, high density polyethylene, polypropylene, poly-1-butylene, poly--4-methyl-1-pentene, ethylene-propylene copolymer, ethene-butene-1 copolymer, propylene-butene-1 copolymer and composition thereof etc.As the unsaturated carboxylic acid that is used for the polyolefin grafting or its acid anhydrides, can enumerate acrylic acid, methacrylic acid, maleic acid, maleic anhydride, citraconic acid, citraconic anhydride, itaconic acid, itaconic anhydride etc.The improved polyalkene that obtains like this can directly use, and also can be used with polyolefin.
Above-mentioned adhesive layer forms by either side or the both sides coating cementing agent at blooming, the polarizer.The thickness of adhesive layer is preferably 0.01～10 μ m, more preferably 0.03～5 μ m.
In addition, make the above-mentioned blooming and polarizer when bonding, in order to improve the cohesiveness with the face of the contacted blooming of the polarizer, the processing that can be easy to bond.As the processing that is easy to bond, can enumerate surface treatment or formation undercoat (ア Application カ one such as corona treatment, Cement Composite Treated by Plasma, low pressure UV processing, saponification processing
) method, the use capable of being combined of these disposal routes.Wherein, the method for preferred corona treatment, formation undercoat and the method that these treatment combinations are used.
Subsequently, on the face of the processing of having carried out as above-mentioned operation being easy to bond, form adhesive layer, the blooming of the present invention and the polarizer are fitted by this adhesive layer.This applying can be undertaken by roll laminating device etc.In addition, can suitably determine heat drying temperature, drying time according to the kind of cementing agent.
The one side at least that blooming of the present invention is fitted in the polarizer as the diaphragm of the polarizer goes up and the polaroid of the present invention that forms, as required also can be on the another side of the polarizer lamination blooming of the present invention, but the also film made by other resin of lamination.As the film of making by other resin, for example can enumerate dimethyl ester resinoid, tri cellulose acetate membrane, poly (ether sulfone) film, polyarylate (Port リ ア リ レ one ト) film, poly-phthalic acid second diester film, poly-phthalic acid naphthalene ester film, polycarbonate membrane, cyclic polyolefin film, maleimide resin film, fluorine-type resin film etc.The above-mentioned film of being made by other resin can be the phase retardation film with given reference phase difference.
In order to improve superficiality, mar proof, polaroid of the present invention is preferably has the layered product of the above hard conating of one deck at least.As this hard conating; for example can enumerate; the hard conating that forms by silicone resin, acrylic resin, acryloyl group silicone resin, ultraviolet curing resin, carbamates hard coating agent etc.; wherein; consider from the angle of the transparency, mar proof, resistance to chemical reagents, preferably the hard conating that forms by ultraviolet curing resin.These hard conatings can use more than one.
As ultraviolet curing resin, can enumerate, for example, be selected from more than one ultraviolet curable resins in ultraviolet hardening acroleic acid polyurethane, ultraviolet hardening epoxy acrylate, ultraviolet hardening (gathering) ester acrylate, the ultraviolet hardening epoxypropane etc.
The thickness of hard conating is preferably 0.1～100 μ m, is preferably 1～50 μ m especially, more preferably 2～20 μ m.In addition, can carry out substrate processing between hard conating.
In addition, optionally, polaroid of the present invention can carry out known non-glare treated such as antireflection or low reflection processing.
[image display device]
At least the one side polaroid that is formed with blooming of the present invention for example can be fitted in liquid crystal cell etc. and goes up and use.Fig. 2 illustrates the structure example of the liquid crystal cell with blooming of the present invention and polaroid.In Fig. 2,6 expression liquid crystal cells.This liquid crystal cell 6 for example can be enumerated, and is active matrix drive-type of representative etc. with the film transistor type, is that the simple matrix of representative is driving etc. with twisted nematic, super-twist nematic.The structure example of the liquid crystal cell of Fig. 2 is for passing through adhesive layer (not shown, down together) lamination polarizer 8 on this liquid crystal cell 6, the goods of making by adhesive layer (not shown) lamination polaroid 7 of the present invention on polarizer 8.Herein, optical element 2 is formed by this polarizer 8 and polaroid 7 laminations, and polaroid 7 has the polarizer 3 in the center, on the surface of its both sides by adhesive layer 5 laminations the diaphragm 4 that constitutes by blooming of the present invention.When lamination polaroid 7 of the present invention and polarizer 8, polarizer 8 and liquid crystal cell 6, can on polaroid 7, polarizer 8 and liquid crystal cell 6, adhesive layer be set in advance.
The cementing agent that is used for lamination polaroid of the present invention and liquid crystal cell is not particularly limited, and can suitably select for use is the cementing agent of base polymer with polymkeric substance such as acrylic polymers, silicone polymkeric substance, polyester, polyurethane, polyamide, polyethers, fluorine class or rubber-like for example.Wherein, preferred acrylic adhesive, good because of its optical transparence, as to demonstrate appropriateness bonding characteristics such as wetting state, coherency and cementability, weatherability, thermotolerance etc. are good.
For cementing agent, require the excellences such as bonding characteristic, weatherability, thermotolerance such as wetting state, coherency, cementability of optical transparence, appropriateness.And, prevent because of foamed phenomenon, obscission due to the moisture absorption, prevent that the optical characteristics that causes because of thermal dilation difference etc. from reducing, the liquid crystal cell warpage, further high-quality from forming, permanance preferable image display device equal angles is considered, requires the adhesive layer that hydroscopicity is low and thermotolerance is good.Based on above viewpoint, preferred acrylic adhesive.
Also can contain adjuvant in the cementing agent, this adjuvant is the resene of natural goods or complex for example, especially gives close-burning resin, comprises glass fibre, filling agent of beaded glass, metal powder, other inorganic powder etc., pigment, colorant, antioxidant etc.In addition, adhesive layer can also be to contain the adhesive layer that particulate has light diffusing.
The coating of above-mentioned cementing agent on polaroid of the present invention is not particularly limited, and can carry out with proper method.Can enumerate for example following method, dissolving or dispersion base polymer or its composition in solvent, prepare the binder solution about about 10～40 quality %, it is directly coated method on the polaroid of the present invention with suitable expansion modes such as curtain coating mode or coating methods, in this method, described solvent comprises the potpourri of appropriate solvents such as independent toluene, ethyl acetate or these solvents; Perhaps, on the release property basement membrane, form adhesive layer, again with its transfer and be adhered to method on the polaroid of the present invention etc. according to this method.
Coating process can adopt intaglio plate rubbing method, excellent rubbing method, roller rubbing method, contrary roller rubbing method, some rubbing method the whole bag of tricks such as (コ Application マ コ one ト), and the intaglio plate rubbing method is the most frequently used method.
Adhesive layer can be formed or the form of the overlapping layer of material such as kind is arranged on the single face or the two sides of polaroid of the present invention with difference.In addition, when being arranged on the two sides, on the two sides of polaroid of the present invention, cementing agent needn't be for same composition, also needn't be same thickness.Can form for difference, the adhesive layer of different-thickness.
In addition, the thickness of adhesive layer can be generally 1 μ m～500 μ m, preferred 5 μ m～200 μ m, preferred especially 10 μ m～100 μ m according to suitably decision such as application target or cohesive force.
Prevent that in order to reach adhesive layer from exposing purposes such as face is contaminated, preferably until for during practicality, the interim bonding releasable film on the face that exposes at adhesive layer covers.Can prevent from like this under common mode of operation, to contact with adhesive layer.As releasable film, can use the known in the past releasable film that suitable thin slice body is coated with as required processing with suitable removers such as silicone, chain alkyl class, fluorine class or molybdenum sulfides, described suitable thin slice body comprises laminated body of for example plastic foil, sheet rubber, paper, cloth, nonwoven fabrics, net, foam sheet, metal forming and these materials etc.
In addition; in the present invention; also can give ultraviolet absorption ability to each layers such as the above-mentioned polarizer, protective film, adhesive layers, the mode that described processing mode is for example handled with ultraviolet light absorbers such as bigcatkin willow acid esters compound, benzophenone compound, benzotriazole compound, cyanoacrylate compound, nickel complex salt compounds by following processing mode etc.
Polaroid of the present invention can be preferred for forming various devices such as image display device etc.Here,, can enumerate, contain the LCD, organic EL display, touch pad of liquid crystal cell etc. as image display device, so long as use the device of polaroid to get final product, unqualified to the kind of image display device.In addition, when being used in LCD, image display device is usually by suitable assembling liquid crystal cell, blooming and assemble component parts such as illuminator in case of necessity, formation such as assembling driving circuit, in the present invention, except using above-mentioned polaroid, the formation of image display device is not particularly limited.For example can enumerate, at the image display device of the one-sided or both sides of liquid crystal cell configuration polaroid, uses and carry on the back illuminator or reflecting plate suitable image display devices such as device as illuminator.Need to prove,, can use for example liquid crystal cell of any types such as TN type, STN type, π type about liquid crystal cell.In addition; during the composing images display device; on can be in position parts suitable more than 1 layer or 2 layers be set, described suitable parts are diffuser plate, anti-dazzle photosphere, antireflection film, fender, prism array (プ リ ズ system ア レ イ), lens array sheet (ア Application チ グ レ ア シ one ト), light diffusing board (light Expansion falls apart), back of the body illuminator etc. for example.
[being used in organic EL display]
Polaroid of the present invention also can be used in organic EL display.
Usually, organic EL display is that lamination of transparent electrode, organic luminous layer and metal electrode form luminophor (organic electroluminescent body) successively on transparent substrates.Here, organic luminous layer is the layered product of various organic films, for example following structure with various combinations: the laminated body of hole injection layer that is made of triphenylamine derivative etc. and the luminescent layer that is made of fluorescence organic solids such as anthracenes; Or such luminescent layer and the laminated body of the electron injecting layer that constitutes by perylene derivant etc. or the laminated body of these hole injection layers, luminescent layer and electron injecting layer etc.
The principle of luminosity of organic EL display is as follows: by applying voltage to transparency electrode and metal electrode, to organic luminous layer injected hole and electronics, these holes and electronics are again in conjunction with the energy excitation fluorescent material that produces, the radiating light when fluorescent material that is excited returns ground state.So-called the mechanism of combination is identical with common diode more midway, can envision thus, and with respect to applying voltage, electric current and luminous intensity present the strong nonlinearity with rectification.
In organic EL display, in order to derive the light that organic luminous layer sends, the electrode of at least one side must be transparent, uses the transparency electrode that is formed by tin indium oxide transparent conductive bodies such as (ITO) as anode usually.In addition, in order to inject electronics easily, improve luminescence efficiency, it is very important using the little material of work function at negative electrode, uses metal electrodes such as Mg-Ag, Al-Li usually.
In having the organic EL display of this structure, organic luminous layer is that film as thin as a wafer about 10nm forms by thickness.So, identical with transparency electrode, the basic printing opacity fully of organic luminous layer.Consequently, do not go into to shine by the transparency carrier surface when luminous, and through transparency electrode and organic luminous layer, and the light that reflection takes place at metal electrode penetrates to the face side of transparency carrier once more, therefore, when being confirmed by the outside range estimation, it is the same that the display surface of organic EL display looks like minute surface.
In containing the organic EL display of following organic electroluminescent body, can be provided with polaroid of the present invention in the face side of transparency electrode, and can between this transparency electrode and polaroid, be provided with birefringent layers (polarizer), described organic electroluminescent body is provided with transparency electrode in the face side of the organic luminous layer luminous by applying voltage, and the rear side at organic luminous layer is provided with metal electrode simultaneously.
Polaroid of the present invention owing to have makes by outside incident, at metal electrode the effect that the light of reflection produces polarisation takes place, and produces following effect by this polarisation effect: the minute surface that can't see metal electrode from the outside.Especially constitute by λ/4 plates when birefringent layers, and the angle that polarization direction became of polaroid and this birefringent layers is adjusted into π/4 o'clock, can cover the minute surface of metal electrode fully.
That is to say, the exterior light that is incident in this organic EL display owing to the reason of polaroid only the linear polarization composition seen through.This linear polarization becomes elliptical polarized light through birefringent layers usually, but birefringent layers is λ/4 plates and is π/4 o'clock with the angle that polarization direction became of polaroid, becomes rotatory polarization.This rotatory polarization sees through transparency carrier, transparency electrode, organic film, reflects at metal electrode, sees through organic film, transparency electrode, transparency carrier once more, becomes linear polarization once more at birefringent layers.So,, therefore can't see through polaroid because this linear polarization is vertical with the polarization direction of polaroid.Its result can be covered the minute surface of metal electrode fully.
[being used in touch pad]
Blooming of the present invention also can be used in the polaroid of touch pad.Usually, touch pad is a following apparatus: the operator carries out the operation of device, system by the transparent area of being located at display frame top with pen or finger touches.Owing to determine that with direction of passage key control cursor the position compares, it is more direct or intuitively directly to touch picture, is widely applied in recent years.In addition, in recent years, mobile phone and PDA (Personal DigitalAssistants; Personal personal digital assistant device) etc. visuality and the frivolous property of strong request under sunshine significantly grown up in portable terminal market.Touch pad comprises variety of way, can distinguish use according to its characteristics.Touch pad comprises modes such as resistive film (opposing film) mode, optical profile type, static capacity combination (being also referred to as simulation capacity combination), infrared mode, ultrasonic type and electromagnetically induced formula.Herein, the touch pad in the resistive film mode is that example describes.
The touch pad of resistive film mode comprises glass/glass type and glass/membranous type.The glass/glass type is to have the glass substrate of transparency conducting layer and have the touch pad that clamping is had living space between the glass substrate of transparency conducting layer, and it is installed on display surface.In addition, with regard to vehicle mounted or carry with regard to the touch pad, owing to expect the touch pad of more lightweight, slimming, glass/membranous type is exactly to replace that top has the glass substrate of transparency conducting layer and the touch pad that obtains with blooming.
The touch pad of glass/glass type as shown in Figure 3, the touch pad of glass/membranous type is as shown in Figure 4.Carry out following explanation with the touch pad of Fig. 3 and 4 pairs of glass/glass types and the touch pad of glass/membranous type respectively.
As long as the most surperficial use straight line polaroid of touch pad or on polaroid the combination lamination circular polarizing disk of λ/4 plates, can obtain as the touch pad full intensity, and can improve visuality by anti-reflection effect.The polaroid of touch pad is 17 among 9 among Fig. 3, Fig. 4.Blooming of the present invention can be used in the polaroid of these touch pads.
Polaroid and λ/4 plates that lamination is made by the blooming of the present invention and the polarizer, and make the angle between the polarizing axis of slow axis in λ/4 plate faces and polaroid be essentially 45 °, can obtain circular polarizing disk.Be essentially 45 ° and be meant 40～50 ° of meanings.Angle between the slow axis in λ/4 plate faces and the polarizing axis of light polarizing film is preferably 41～49 °, more preferably 42～48 °, more preferably 43～47 °, most preferably is 44～46 °.
Blooming of the present invention can be used for polaroid protective film upper and lower, following outer (the lightweight film of ITO is set) arbitrarily and locate.In addition, the antireflection of touch pad comprises linear polarization type and rotatory polarization type (comparing linear polarization reflectivity height with rotatory polarization), and blooming of the present invention both can be used for circular polarizing disk and also can be used for linear polarization type polaroid.
Use the circular polarizing disk or the straight line polaroid of blooming of the present invention can be used for infiltration type, reflection-type touch pad arbitrarily.
Embodiment
Below, by embodiment and comparative example the present invention is described in more detail, but these embodiment do not constitute any restriction to the present invention.
(evaluation method)
1. the modulus of elasticity in static bending
Measure according to JIS K7171.
2.MFR mensuration
With melt indexer (" F-W01 (model) "; The smart mechanism of Japan is done made), according to JISK7210, under 230 ℃, 2.16kg heavy burden condition, measure MFR.
3. pulling strengrth
Carry out according to ASTM D638.
4. the evaluation of phase differential in the face
Under wavelength 589.3nm, incident angle 0 degree, use phase differential in measuring difference of phases machine (prince's instrumentation machine Co., Ltd.'s system " KOBRA-WR ") the mensuration face.
5. transparent (mist degree)
Measure according to JIS K7105.
6. thermotolerance and moisture-proof
Polyvinyl acetate is carried out PVA that saponification obtains as cementing agent, and the blooming that embodiment 1 and comparative example 1 are obtained is bonded in the two sides of the polarizer, obtains polaroid, and the described polarizer is made by the polyvinyl alcohol resin film that has adsorbed iodine and orientation takes place.
Downcut the square test film of 150mm by this polaroid, observe the outward appearance that keeps 1,000 hour rear polarizer down at 90 ℃, carry out the thermotolerance evaluation.Do not deform, painted etc. situation is " zero ", deform, painted etc. situation is " * ".
In addition, observe the outward appearance that keeps 1,000 hour rear polarizer at 70 ℃, relative humidity for 95% time, as the moisture-proof evaluation.Do not deform, painted etc. situation is " zero ", deform, painted etc. situation is " * ".
7.Rth mensuration
With measuring difference of phases machine (" KOBRA-WR " (model): prince's instrumentation machine Co., Ltd. system) measure embodiment 1～3 and the comparative example 2 gained bloomings phase differential relevant with angle in wavelength 589.3nm place, under-50～50 ° incident angle, per 10 ° of mensuration are once asked the phase differential Rth of calculation blooming at thickness direction with this result.
Embodiment 1
Will be by (Japan Polypropylene Corp.'s manufacturing of the synthetic acrylic resin of metalloscene catalyst, trade name: WINTEC (ウ イ Application テ Star Network), the modulus of elasticity in static bending: 900MPa, 142 ℃ of fusing points, below be designated as " mPP-A ") 200 ℃ of processing temperatures, under the condition that the winding roller temperature is 50 ℃, carry out T pattern individual layer extrusion molding, obtain blooming thus with the thickness of 100 μ m.
Using commentary valency method estimates this blooming.The result is shown in the 1st table.In addition, the measurement result of Rth is shown in the 2nd table.
With (Japan Polypropylene Corp. makes by the synthetic acrylic resin of metalloscene catalyst, trade name: WINTEC, the modulus of elasticity in static bending: 1200MPa, 135 ℃ of fusing points, below be designated as " mPP-B ") replace the used mPP-A of embodiment 1, in addition, all operate, obtain blooming according to method similarly to Example 1.Identical with embodiment 1, evaluation result is shown in the 1st table and the 2nd table.
Embodiment 3
Further adding two in the used mPP-A of embodiment 1 replaces dibenzyl sorbitol class nucleator masterbatch (Rikenvitamin Co., Ltd. makes, trade name Rikemaster, PN-10R, nucleator 10 quality % goods), addition is for to add 1 mass parts (transparent nucleater content is 0.1 mass parts) with respect to 100 mass parts mPP-A, method operation according to similarly to Example 1 obtains blooming.Identical with embodiment 1, evaluation result is shown in the 1st table and the 2nd table.
Embodiment 4
With (Japan Polypropylene Corp. makes by the synthetic acrylic resin of metalloscene catalyst, trade name: WINTEC, the modulus of elasticity in static bending: 700MPa, 125 ℃ of fusing points, below be designated as " mPP-C ") replace the used mPP-A of embodiment 1, in addition, all operate, obtain blooming according to method similarly to Example 1.Identical with embodiment 1, evaluation result is shown in the 1st table.
Comparative example 1
With (Primepolymer Co., Ltd. makes by the synthetic acrylic resin of Zeigler catalyst, trade name: Primepolypro, the modulus of elasticity in static bending: 1,100MPa, 135 ℃ of fusing points below are designated as " random PP ") replace the used mPP-A of embodiment 1, in addition, all operate, obtain blooming according to method similarly to Example 1.Identical with embodiment 1, evaluation result is shown in the 1st table.
[table 1]
| Acrylic resin (100 mass parts) | Dibenzylidene sorbitol class additive (mass parts) | MFR (g/10 min) | The modulus of elasticity in static bending (MPa) | Pulling strengrth (MPa) | Phase differential (nm) in the face | Mist degree (%) | Thermotolerance | Moisture-proof | |
| Embodiment 1 | mPP-A | - | 24 | 900 | 30.5 | 4 | 6 | ○ | ○ |
| |
mPP-B | - | 30 | 1200 | 35.0 | 5 | 9 | - | - |
| Embodiment 3 | mPP-A | 0.1 | 24 | 900 | 36.6 | 8 | 3 | - | - |
| Embodiment 4 | mPP-C | - | 15 | 700 | 29.5 | 5～27 *1 | 3 | - | - |
| Comparative example 1 | Random PP | - | 25 | 1100 | 30.0 | 25 | 20 | × | × |
*1: in the described manufacture method of embodiment because at film end stress application, though in the face phase differential occur uneven, in face phase differential low batch in can be used as polaroid and use.
The blooming of embodiment 1～3 gained shows has good performance.In addition, though embodiment 4 easy film end stress applications, and phase differential is 5～27nm in the face, inequality is arranged slightly, but still have the low zone of phase differential, shows to can be used for polaroid.By contrast, phase differential is 25nm in the optics face of comparative example 1 gained, considerably beyond 10nm, shows not to be suitable for polaroid.
Comparative example 2
Measure commercially available TAC film (" Fujitac (trade name) ": film Co., Ltd. of Fuji system, thickness: Rth 80 μ m) with above-mentioned assay method.The result is shown in the 2nd table.
[table 2]
| Acrylic resin (100 mass parts) | Rth (nm) | |
| Embodiment 1 | mPP-A | 36 |
| |
mPP-B | 40 |
| Embodiment 3 | mPP-A | 57 |
| Comparative example 2 | TAC | 45 |
The Rth of embodiment 1～3 used polypropylene resin film is identical with the Rth degree of commercially available TAC film, demonstrates the phase differential performance identical with the TAC film.
Industrial applicibility
The present invention can provide the blooming that is suitable for use as polarizer diaphragm, and described blooming has the good optical characteristics such as mist degree is little, the transparency is good, birefringence is little, and has good mechanical strength and heat resistance, and poisture-penetrability is good. In addition, the various durability such as blooming heat resistance of the present invention, humidity resistance, cold-hot circulation are good, and the optical property of polarizer is had no effect, and can improve the degree of polarization of polarizer, and soft, springiness.
In addition, blooming of the present invention by this blooming is fitted on the polarizer, can provide the intensity of liquid crystal display cells, the polarizer that reliability obviously improves because impact, distortion from the outside are had resistance.
In addition, blooming of the present invention is compared with widely used TAC film in the past, the TAC film is hydrophilic, does not substantially have moisture resistance, by contrast, because blooming of the present invention is hydrophobic, can significantly improve the durability of polarizer. Therefore, blooming of the present invention can preferably be laminated at least one side of polarizer and use as liquid crystal cell surface substrate and bonding diaphragm, also can be used as the diaphragm of other face of polarizer.
Claims (8)
1. polarizer diaphragm blooming, it is by making by the synthetic polypropylene-based resin of metalloscene catalyst.
2. the described blooming of claim 1, wherein, the modulus of elasticity in static bending of described polypropylene-based resin is more than the 700MPa.
3. claim 1 or 2 described bloomings, wherein, the melt flow rate of described polypropylene-based resin is that MFR is more than 20g/10 minute, described melt flow rate is according to JIS K7210, the measured value under 230 ℃, 2.16kg heavy burden condition.
4. each described blooming in the claim 1～3, wherein, described blooming is a unstretching film.
5. each described blooming in the claim 1～4, wherein, with respect to the described polypropylene-based resin of 100 mass parts, this blooming also contains the dibenzylidene sorbitol class adjuvant of 0.03～0.5 mass parts.
6. each described blooming in the claim 1～5, wherein, the phase differential Rth of the thickness direction of described blooming is 20～60nm.
7. polaroid wherein, forms each described blooming of claim 1～6 in the one side at least of the polarizer.
8. image display device, it uses the described polaroid of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006312268 | 2006-11-17 | ||
| JP312268/2006 | 2006-11-17 | ||
| JP261295/2007 | 2007-10-04 | ||
| JP261297/2007 | 2007-10-04 |
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| CNA2007800427255A Pending CN101573642A (en) | 2006-11-17 | 2007-11-19 | Optical film, polarizing plate and image display device |
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Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04284403A (en) * | 1991-03-13 | 1992-10-09 | Tokuyama Soda Co Ltd | Production of phase difference plate |
| JP3656324B2 (en) * | 1996-06-03 | 2005-06-08 | 住友化学株式会社 | Propylene / ethylene-α-olefin block copolymer and method for producing the same |
| JPH1053674A (en) * | 1996-08-09 | 1998-02-24 | Ube Ind Ltd | Oriented film |
| JPH11254522A (en) * | 1998-03-11 | 1999-09-21 | Tokuyama Corp | Polypropylene film |
| JP2000035512A (en) * | 1998-07-17 | 2000-02-02 | Sumitomo Chem Co Ltd | Polarizing film |
| JP2001013324A (en) * | 1999-06-30 | 2001-01-19 | Nitto Denko Corp | Production of phase difference plate |
| MXPA03004655A (en) * | 2000-11-27 | 2003-09-04 | Ciba Sc Holding Ag | Substituted 5-aryl and 5-heteroaryl-2-(2-hydroxyphenyl)-2h-benzotriazole derivatives as uv absorbers. |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5444601B2 (en) | 2014-03-19 |
| JP2008146023A (en) | 2008-06-26 |
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