CN101678641B - Multilayer film for optical component - Google Patents
Multilayer film for optical component Download PDFInfo
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- CN101678641B CN101678641B CN2008800161699A CN200880016169A CN101678641B CN 101678641 B CN101678641 B CN 101678641B CN 2008800161699 A CN2008800161699 A CN 2008800161699A CN 200880016169 A CN200880016169 A CN 200880016169A CN 101678641 B CN101678641 B CN 101678641B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims description 93
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- 238000004519 manufacturing process Methods 0.000 claims description 18
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- 239000002904 solvent Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical compound CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000012695 Interfacial polymerization Methods 0.000 description 2
- 235000005811 Viola adunca Nutrition 0.000 description 2
- 240000009038 Viola odorata Species 0.000 description 2
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- -1 carboxylic acid halides Chemical class 0.000 description 2
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- KLSLBUSXWBJMEC-UHFFFAOYSA-N 4-Propylphenol Chemical compound CCCC1=CC=C(O)C=C1 KLSLBUSXWBJMEC-UHFFFAOYSA-N 0.000 description 1
- ZBMWIKZBITYTCF-UHFFFAOYSA-N 4-[2,3-di(propan-2-yl)phenyl]phenol Chemical compound CC(C)C1=CC=CC(C=2C=CC(O)=CC=2)=C1C(C)C ZBMWIKZBITYTCF-UHFFFAOYSA-N 0.000 description 1
- CYYZDBDROVLTJU-UHFFFAOYSA-N 4-n-Butylphenol Chemical compound CCCCC1=CC=C(O)C=C1 CYYZDBDROVLTJU-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 244000287680 Garcinia dulcis Species 0.000 description 1
- 101001104570 Homo sapiens Proteasome assembly chaperone 2 Proteins 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000004419 Panlite Substances 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 102100041008 Proteasome assembly chaperone 2 Human genes 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 125000001931 aliphatic group Chemical group 0.000 description 1
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- 150000001491 aromatic compounds Chemical class 0.000 description 1
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- YPHMISFOHDHNIV-FSZOTQKASA-N cycloheximide Chemical compound C1[C@@H](C)C[C@H](C)C(=O)[C@@H]1[C@H](O)CC1CC(=O)NC(=O)C1 YPHMISFOHDHNIV-FSZOTQKASA-N 0.000 description 1
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- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
Landscapes
- Laminated Bodies (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Disclosed is a multilayer film comprising a base film having low birefringence, good surface smoothness and excellent optical isotropy. Specifically disclosed is a multilayer film for optical components, wherein a protective film having a thickness of 10-100 [mu]m and a thickness unevenness of +- 1.5 [mu]m is arranged on a base film which is made of a thermoplastic resin and has a thickness of 10-150 [mu]m, a thickness unevenness of +- 2 [mu]m, an average of in-plane birefringence (delta n) of 0.00001-0.00017 and an average of birefringence in thickness direction (delta n th) of 0.00001-0.001.
Description
Technical field
The present invention relates to that member as the optics of high density compact disc, LCD, OLED display, Electronic Paper etc. uses, by base material film and multilayer film for optical component that the film that it is protected is constituted.In addition, relate to this stacked film is rolled the film volume that forms, the CD that has used this multilayer film for optical component.
Background technology
In order to write down, regenerate Word message, image information, acoustic information in large quantities; Require compact disk (Compact DiscCD), digital versatile disc (Digital Versatile Disc, DVD) the further raising of the packing density of optical information recording medium such as grade (CD).Particularly developed since the blue-violet laser,, developed the optical disk system of having used this blue-violet laser and high NA adapter in order to tackle the video recording that the clear TV of digital high-definition plays.The technology of CD that one of them has proposed to read from single face the face incident mode of information discloses patent documentation 1 and non-patent literature 1 etc.
In addition, at present, as Blu-ray disc (Blu-ray Disc), commercially available high density optical disc systems.This Blu-ray Disc is characterised in that, on the thick disc board of 1.1mm, has reflectance coating and even recording film with relief patterns such as pit and even grooves as information recording layer, is provided with the light-transmitting layer that is called tectal thick 0.1mm above that.The reading of information, write from the light-transmitting layer side and use bluish violet color laser to carry out.
This light-transmitting layer is formed with information recording layer is bonding by adhesive etc. through being situated between by the plastic foil that Merlon etc. is processed.For the mistake that prevents that information from reading or writing, require high optical isotropies such as little birefringence, good surface smoothness for plastic foil.In addition, Blu-ray Disc is high density, big capacity, because of microlesion, foreign matter to light-transmitting layer adhere to reading, writing of the information of can not carrying out.Therefore, when using,, hard conating is set in order to protect light-transmitting layer as the naked dish of protection such as box of no use.
In the manufacturing of CD, the limit is rolled the film volume that forms from the plastic foil that will become light-transmitting layer and is pulled out the plastic foil limit and fit to method on the optic disc base board preferred aspect the productivity ratio.But the general sliding of the very smooth plastic foil in surface that requires is poor, can not be wound as web-like under its independent situation usually and becomes uniform film volume.
Therefore, in order to obtain the film volume of optical applications, will have that fusible diaphragm is range upon range of to be rolled in plastic foil.Promptly; Go up to paste at the extremely smooth plastic foil (being called base material film among the present invention) of optical applications and have fusible diaphragm and range upon range of, protection its surperficial in, with the face of the opposition side of diaphragm asperitiesization moderately; Become the structure of easy slip, can this stacked film be rolled up web-like.
Usually, pull out stacked film, after diaphragm is peeled off base material film is punched to plate-like, fit, make Blu-ray Disc with its optic disc base board of moulding by this film volume.But in this method, it is concavo-convex that base material film produces, and this is concavo-convex to be one of change in electric cause of increased that makes CD.The big CD of such change in electric might form obstacle to recording of information regeneration, therefore is judged as defective work in during fabrication the inspection and discards.Therefore,, produce discarded CDs in a large number, not only bring loss economically, and also bring negative effect aspect utilizing in resources effective if use the many multilayer film for optical component of concave-convex surface to produce CD.Therefore, need the multilayer film for optical component that concave-convex surface is few, productivity ratio is high.
Therefore, in order to improve these concave-convex surfaces, proposed through fusible adhesive a little less than not using between base material film and the diaphragm they range upon range of rolling, thereby improved concavo-convex method (patent documentation 2).But, for this method, for example; Make width 1, the base material film of 000mm, the stacked guard film and roll obtain volume after; Roll out stacked film when volume of wide 140mm by this volume through cutting machine,, therefore produce the base material film friction and scratch and problem such as sustain damage because diaphragm does not have cohesive.
In addition, a little less than using between base material film and the diaphragm fusible adhesive they are the range upon range of and method (patent documentation 3) rolled has also been proposed.But, in this method, will be strong cohesive for diaphragm, have for base material film a little less than fusible adhesive evenly be coated with processing and the diaphragm that obtains is necessary, therefore uneconomical.
In addition, also proposed to form the soluble solvent of resin of base material film and carry out drying through coating, thereby with the concavo-convex method of dwindling or alleviating (patent documentation 4) of base material film.But coating, the drying process of solvent are necessary before film uses, and be therefore uneconomical.
(patent documentation 1) japanese kokai publication hei 08-235638 communique
The huge capacity compact discs OplusE of (non-patent literature 1) single face 12G byte, 20 volumes, No.2,183 pages (in February, 1998)
(patent documentation 2) TOHKEMY 2001-243659 communique
No. 2003/004270 brochure of (patent documentation 3) International Publication
(patent documentation 4) TOHKEMY 2007-016076 communique
Summary of the invention
The object of the present invention is to provide the stacked film with base material film, this base material film has little birefringence, good surface smoothness, the excellent optical isotropy of demonstration.In addition, the object of the present invention is to provide the stacked film of excellent in sliding property.In addition, the object of the present invention is to provide the time the few stacked film of the generation rate of substandard products in the optical disc production as the member of CD etc.
In addition, the object of the present invention is to provide this stacked film is wound into the film volume that web-like forms.In addition, the object of the present invention is to provide the excellent CD of electric signal characteristics such as shake, error rate.In addition, the object of the present invention is to provide when diaphragm peeled off, become the manufacturing approach of the stacked film of film with utmost point good surface smoothness.
The inventor furthers investigate with the manufacturing approach of the stacked film of parts base material film that use, that can not had micro concavo-convex can be used as optics.Its result finds; Through used thickness deviation little base material film with good surface smoothness and the little diaphragm of thickness deviation; And then with base material film and diaphragm when range upon range of; Make the tension force that each film is applied in the scope of stipulating, thereby can prevent the concavo-convex base material film that is transferred to of diaphragm, accomplished the present invention.
That is, the present invention relates to a kind of film, it is the multilayer film for optical component that diaphragm is arranged in the base material film laminated, and base material film is become by polycarbonate resin, satisfies:
(i) thickness is 10～150 μ m,
(ii) thickness deviation is below ± 2 μ m,
(iii) the mean value of the birefringence (Δ n) in the face is 0.00001～0.00017,
The (iv) birefringence of thickness direction (Δ n
Th) mean value be 0.00001～0.001, diaphragm satisfies:
(i) thickness is 10～100 μ m,
(ii) thickness deviation is below ± 1.5 μ m.
The present invention comprises above-mentioned stacked film is rolled the used for optical part film volume that forms.
In addition, the present invention comprises the base material film of peeling off diaphragm from above-mentioned stacked film and obtaining is pasted on the substrate and the CD that obtains as light-transmitting layer.
In addition, the present invention relates to a kind of manufacturing approach, it is that base material film is become by polycarbonate resin with the manufacturing approach of base material film and the range upon range of multilayer film for optical component that forms of diaphragm, satisfies:
(i) thickness is 10～150 μ m,
(ii) thickness deviation is below ± 2 μ m,
(iii) the mean value of the birefringence (Δ n) in the face is 0.00001～0.00017,
The (iv) birefringence of thickness direction (Δ n
Th) mean value be 0.00001～0.001, diaphragm satisfies:
(i) thickness is 10～100 μ m,
(ii) thickness deviation is below ± 1.5 μ m,
Under the condition that satisfies following formula (1)～(3), carry out range upon range of:
10＜T
B＜200 (1)
10＜T
P＜150 (2)
1≤T
B/T
P≤10 (3)
(wherein, T
BRepresent when range upon range of the tension force (N/m) of per unit width in the base material film.T
PRepresent when range upon range of the tension force (N/m) of per unit width in the diaphragm.)
Description of drawings
Fig. 1 is the sketch of the film forming apparatus that uses among the embodiment.
Fig. 2 is the sketch of position of the 1st chill roll and the die lip front end of the film forming apparatus that uses among the embodiment of expression.
1: mouthful mould
2: the 1 chill rolls
3: the 2 chill rolls
4: the 3 chill rolls
5: nip rolls
6: diaphragm
7: laminating apparatus
8: nip rolls
9: up-coiler
The specific embodiment
Below the present invention is elaborated.
The present invention relates to have the multilayer film for optical component of diaphragm in the base material film laminated.Have, the following term that uses in this specification has following implication again.
So-called " base material film " is meant with homogeneous on the optics to be the film that is used for optics of characteristic.
So-called " diaphragm " is to point to the surface damage that suppresses base material film, and when the film volume that making is rolled, and for the volume that keeps so-called film volume well forms, is laminated in base material film and the film that uses.
So-called " CD " is meant mainly the recording medium of the plate-like that is formed by polycarbonate resin to be endowed information recording layer.
So-called " light-transmitting layer " is the layer of the following function of performance, that is, the recorded information layer that covers CD with material transparent is protected information recording layer, and carries out record regenerating through this material transparent irradiating laser.
(base material film)
Base material film is the film that can be used as the optics use of high density compact disc, LCD, OLED display, Electronic Paper etc.These goods manifest function through using polarised light, for the high performance of goods, require to use the film of homogeneous on the optics that the polarised light of wanting transmission is not exerted an influence.Particularly for CD, laser becomes the short bluish violet color laser of wavelength, and packing density uprises, and the blooming for the light-transmitting layer as CD uses requires high optics homogeneity.
(polycarbonate resin)
Base material film of the present invention is become by polycarbonate resin.Optic disc base board generally uses polycarbonate resin, this be because: if the characteristic of the CD of considering to obtain with the requirement on the quality of film, preferably makes physical characteristic conform to optic disc base board as light-transmitting layer as far as possible.
Polycarbonate resin obtains through make the reaction of dihydroxy composition and carbonate precursor with interfacial polymerization or melt phase polycondensation.
As the typical example of dihydroxy composition, can enumerate 2, two (4-hydroxy phenyl) propane (common name bisphenol-A), 2 of 2-; Two { (4-hydroxy-3-methyl) phenyl } propane, 2 of 2-, two (4-hydroxy phenyl) butane, 2 of 2-, two (4-the hydroxy phenyl)-3-methybutanes, 2 of 2-; Two (the 4-hydroxy phenyls)-3 of 2-, 3-dimethylbutane, 2, two (4-the hydroxy phenyl)-4-methylpentanes, 1 of 2-; 1-bis(4-hydroxyphenyl)cyclohexane, 1, two (the 4-hydroxy phenyls)-3,3 of 1-; 5-trimethyl-cyclohexane, 9, two { (4-hydroxy-3-methyl) phenyl } fluorenes and the α of 9-, α '-two (4-hydroxy phenyl)-diisopropyl benzene etc.These dihydric phenols can use separately or use mixing more than 2 kinds.Wherein, the polycarbonate resin that preferably obtains by the dihydroxy composition that has 50 moles of above bisphenol-As of % at least.The content of the bisphenol-A in the dihydroxy composition more preferably is at least 60 moles of %, further preferably is at least 75 moles of %, especially preferably is at least 90 moles of %.
As carbonate precursor, use carboxylic acid halides, carbonic ester or haloformate etc., can enumerate the bishaloformate of phosgene, diphenyl carbonate or dihydric phenol etc. particularly.
Adopt interfacial polymerization or melt phase polycondensation to make dihydric phenol during the manufacturing polycarbonate resin, can use the anti-oxidant of catalyst, terminal terminator, dihydric phenol etc. as required with the carbonate precursor reaction.In addition; Polycarbonate resin can be the branched polycarbonate resin that the multi-functional aromatic compound copolymerization more than the trifunctional is formed; It also can be the polyestercarbonate resin that aromatic series or aliphatic two functionality carboxyl acid copolymers are formed; In addition, also can be the mixture that mixes more than 2 kinds with the polycarbonate resin that obtains.
The molecular weight of polycarbonate resin representes to be preferably 10,000～40,000 with viscosity average molecular weigh, and more preferably 11,000～30,000, further be preferably 12,000～19,000 scope.
Because optic disc base board uses the polycarbonate resin of viscosity average molecular weigh about 15,000, if the polycarbonate membrane that therefore uses as light-transmitting layer is above-mentioned scope, the film that then obtains is difficult for becoming fragile, and the situation that end face produces breach when being punched to plate-like etc. tails off.In addition, be difficult to produce foreign matter when melt extruding, be difficult to produce thickness deviation, from these aspects and preferred.In addition, roll, when volume is opened, for example be punched to plate-like and when mechanically carrying, flatness also becomes well, be difficult to when fitting to recording layer have problems to behind the web-like, therefore preferred.
The scope of the viscosity average molecular weigh of most preferred polycarbonate resin is 14,500～17,500.In addition, as polycarbonate resin, the preferred not polycarbonate resin of the foreign matter of pbz polymer amount, hot deterioration thing etc. that uses as far as possible.
Viscosity average molecular weigh (M) is with by at 20 ℃ polycarbonate resin 0.7g being dissolved in the specific viscosity (η that the solution of gained among the carrene 100ml is tried to achieve
Sp) the substitution following formula obtains.
η
sp/c＝[η]+0.45×[η]
2c
[η]＝1.23×10
-4M
0.83
(wherein c=0.7, [η] is inherent viscosity)
In addition, in light-transmitting layer, use and be best suited for by film with the polycarbonate resin one-tenth of the resin identical characteristics that form optic disc base board (that is, same materials and have approximate viscosity average molecular weigh).With the requirement on the quality of film, preferably the physical characteristic of optic disc base board and the physical characteristic of light-transmitting layer are conformed to as light-transmitting layer.As physical characteristic, can enumerate coefficient of thermal expansion, moisture expantion rate, percent thermal shrinkage, viscoplasticity performance etc.At optic disc base board and light-transmitting layer not simultaneously based on heat, the expansion characteristics of moisture absorption, hot expansion performance; Perhaps the viscoplasticity at both shows not simultaneously; CD after optic disc base board and the light-transmitting layer that will have information recording layer sometimes fitted because of the promotion test of durability or long-term through the time ground distortion such as change not; Deformation takes place, and produces skewness.
(thickness)
The thickness of base material film is 10～150 μ m.The thickness of film cannot treat different things as the same because of film is different as the design of the product of optics, if but generally speaking thickness is thin excessively; Then the property handled variation is therefore not preferred, if blocked up; Then light transmittance variation etc. can't satisfy the characteristic that requires as optics sometimes, and is therefore not preferred.The scope of preferred 50～100 μ m of thickness during in particular as the light-transmitting layer of high density compact disc.
(thickness deviation)
The thickness deviation of base material film is below ± 2 μ m, be preferably ± below the 1.5 μ m, more preferably ± 1 below the μ m.If thickness deviation is excessive, the heterogeneity that becomes on the optics, therefore not preferred.During in particular as the light-transmitting layer of high density compact disc, this thickness deviation makes the variation of the signal level of CD become big, and is therefore not preferred.
(total light transmittance)
Total light transmittance of base material film is preferably more than 85%, more preferably more than 89%, further is preferably more than 90%.During in particular as the light-transmitting layer of high density compact disc, in order to prevent the deterioration of optical signal, total light transmittance is high more good more.
(mean value of the birefringence (Δ n) in the face)
The mean value of the birefringence (Δ n) in the face of base material film is 0.00001～0.00017.The lower limit of the mean value of Δ n is preferably 0.00003, and more preferably 0.00005.In addition, the upper limit of the mean value of Δ n is preferably 0.00012, and more preferably 0.00009.Δn is the optical film plane slow axis (rather late axis) direction is referred to as the refractive index nx, the refractive index in the direction perpendicular thereto is denoted by ny, it is possible as Δn = | nx-ny | and the values obtained , which means that the film surface the size of the birefringence.If it is big that Δ n becomes, the variation of the signal level of the CD that then uses as light-transmitting layer becomes big, and is therefore not preferred.
In addition, the deviation of the birefringence in the face is preferably ± below 0.00005, more preferably ± below 0.00003.
(the birefringence of thickness direction (Δ n
Th) mean value)
The birefringence of the thickness direction of base material film (Δ n
Th) mean value be 0.00001～0.001.Δ n
ThThe lower limit of mean value be preferably 0.00003, more preferably 0.00005.In addition, Δ n
ThThe upper limit of mean value be preferably 0.0006, more preferably 0.0004.
Δ n
ThBe refractive index with the optics slow-axis direction in the face be designated as nx, with the refractive index in the face of perpendicular direction be designated as ny, when the refractive index of film thickness direction is designated as nz, can be as Δ n
Th=| (nx+ny)/and 2-nz| and the value obtained, the birefringent size of expression film thickness direction.With described in the non-patent literature 1～2, in high density optical disc systems, use the big object lens of opening number of pickup-use object lens like patent documentation 1.Therefore, compare with existing CDs such as CD, DVD, the oblique incidence angle of laser is big, and the influence of the birefringence of disk thickness direction increases.Therefore, if Δ n
ThGreatly, then the variation of the signal level of CD becomes big, and is therefore not preferred.
In addition, the deviation of the birefringence of thickness direction is preferably ± below 0.00005, more preferably ± below 0.00003.
The thickness of these films, thickness deviation, total light transmittance, the mean value of Δ n, Δ n
ThMean value etc. can adopt the method for putting down in writing among the embodiment to measure.Have again, during the condition put down in writing among the discontented sufficient embodiment of the size of sample, the size pro-rata of the sample of embodiment is measured.
< manufacturing of base material film >
The system film of base material film can use known film build methods such as solution casting method, extrusion by melting, rolling process.Base material film is preferably the base material film that adopts extrusion by melting to form.
As the solvent that from the solution casting method of mouth mould extrusion solution, uses, preferably use for example organic solvents such as carrene, chloroform, dioxolanes, toluene, dimethyl formamide, N-methyl pyrrolidone.The preferred solution concentration of using is the solution that 10 weight % are above, preferred 15 weight % are above.
Relative therewith, extrusion by melting is not owing to use solvent, so productivity ratio is excellent.The processing and forming property of the polycarbonate resin that base material film of the present invention preferably uses is excellent, though the film that adopts extrusion by melting also can obtain having enough optics homogeneity, so the preferred molten extrusion molding.
As extrusion by melting,, can use the machine that melt extrudes of non-blow vent mode in order to obtain the film of homogeneous.In addition, also can use the machine that melt extrudes of blow vent with the volatilization gas degassing that can produce with the moisture in the raw material, by the melting mixing resin.In blow vent, preferably be provided for the moisture, the volatilization gas that produce are discharged to the vavuum pump that melt extrudes the machine outside efficiently.In addition, can also be provided in the zone before melt extruding machine mouth mould portion foreign matter being removed with extruding the screen cloth that the foreign matter of sneaking in the raw material etc. is removed.As such screen cloth, can enumerate wire netting, net-changing device (screenchanger), sintered metal plates (dish filter etc.) etc.
(mouthful mould)
The mouth mould that uses in the extrusion by melting can use from the central portion of the width of mouth mould and supply with the T type mouth mould (applying clothes hanger type mouth mould) of the type of resin, flows into the I type mouth mould etc. of the type of resin from an end of the width of mouth mould.
Chill roll both can adopt the chill roll that only uses 1 roller to cool off, and also can adopt the chill roll that uses a plurality of rollers to cool off, but in order to cool off film equably, preferably the chill roll of the surface temperature of accurate control roll equably.When using a plurality of rollers to cool off; The method that between the chill roll (being called the 2nd chill roll) of the chill roll (being called the 1st chill roll) of the initial contact of molten resin and next contact, flows down molten resin is arranged and flow down the method for molten resin, below the latter's method is carried out illustration at the opposition side with the 2nd chill roll of the 1st chill roll.
(resin temperature)
The melt viscosity of resin was the temperature of the scope of the scope of 50～600Pas, preferred 70～300Pas when the resin temperature when melt extruding preferably made the shear rate of 100 (1/s) under this temperature.In order to reach this temperature range, the barrel through setting extruder and the temperature of mouthful mould can make molten resin show the flowability of appropriateness, the shear stress of extruder, mouthful mould inside and die lip are controlled at low-level, therefore birefringence are diminished.Simultaneously, also have bias current, the delay that barrel is interior, filter is interior that are difficult to be created in extruder, suppress the effect of hot deterioration foreign matter generations such as gel.
(distance of die lip front end and chill roll)
When melt extruding; The molten resin cooling that to extrude from the mouth mould and when becoming membrane stage; Receive the contraction between die lip front end and chill roll (being meant the chill roll of the initial contact of molten resin especially), the influences such as disorder of surrounding air, be easy to generate thickness deviation, mouthful loft.Therefore, enough narrow through the interval that makes die lip front end and chill roll, make the wave disappearance of molten resin in the space, can access the controlled film of thickness deviation.That is, preferably making the distance (L1 among Fig. 2) of die lip front end and chill roll is the scope of 5～70mm, and the scope of 5～50mm more preferably further is preferably the scope of 5～30mm.
Receive the tension force of flow direction during the molten resin of discharging from the mouth mould in addition, flowing down between chill roll-die lip.On the other hand, produce thermal contraction when being cooled, owing to solidify hastily, therefore shrink and suffer restraints, produce tension force at width though contact with chill roll.Because film receives the tension force of this quadrature,,, obtain the balance of tension force, thereby can make the birefringence reduction through regulating molten resin to the lowering position of chill roll, chill-roll temperature etc. though therefore can produce birefringence.The distance of die lip front end and chill roll as stated, from control thickness deviation viewpoint, the scope of preferred 5～70mm.
(distance of the horizontal direction of die lip front end and chill roll)
In addition, the distance of the horizontal direction of die lip front end and chill roll (L2 among Fig. 2) looks like clockwise position from the rotation of chill roll to be seen, preferred die lip front end is positioned at from the center of chill roll to the position of chill roll right-hand member.Its position is different because of size, other film forming conditions of chill roll; Therefore cannot treat different things as the same; But the birefringence of the film that obtains is on the width of film when big, can adjusting position, with through further change to the right of position with the die lip front end; Flow direction to film applies tension force, thereby the birefringence of the film that obtains is diminished.
(temperature of chill roll)
The molten resin of extruding from the mouth mould is cooled and the temperature of the chill roll that contacts when becoming membrane stage, with respect to the glass transition temperature (Tg) of the resin that uses, is the scope of (Tg-45)～(Tg-1) ℃, is preferably the scope of (Tg-35)～(Tg-1) ℃.Through the temperature that makes chill roll is above-mentioned scope, can suppress to cool off the distortion of generation, preferred in this.Thus can be because of reducing the birefringence that cooling strain produces.
(aperture of die lip)
In addition, the aperture of die lip is preferably 5t～25t (μ m) with respect to the thickness t (μ m) of film.Particularly, when the thick film of 100 μ m was extruded the system film, preferably making die lip was about 0.5～2.5mm.Through die lip being adjusted to this scope, the resin of discharge alleviates at the shear stress that die lip receives, and can the birefringence of the film that obtains be controlled at low-level, therefore preferred.In addition, if be this scope, because wide fully, therefore also has the effect that film is able to alleviate because of the defective of die lip, with mouthful loft that contacting of attachment etc. produces with respect to film thickness.
(additive)
In base material film, in the scope of the characteristic of not damaging the film that fusion system film obtains, transparency of for example film etc., can contain stabilizing agent, ultra-violet absorber, toner, antistatic additive etc.
< diaphragm >
Base material film of the present invention surface is too smooth and sliding is poor, uses separately to be difficult to fitly be wound into web-like.Therefore, carry out the range upon range of operation of giving sliding in base material film, being wound as web-like of diaphragm that a face has been carried out asperitiesization.
The thickness of diaphragm is 10～100 μ m.If thickness is thinner than it, the property handled variation, therefore not preferred.If blocked up, fit in base material film and thickness when processing stacked film increases, the property handled variation, therefore not preferred.
The thickness deviation of diaphragm is below ± 1.5 μ m, be preferably ± below the 1 μ m.If thickness deviation is bigger than it, the concavo-convex meeting of diaphragm is transferred on the base material film, in that peel off diaphragm from stacked film not preferred as optics becomes problem during with parts with base material film.During in particular as the light-transmitting layer of high density compact disc, the thickness deviation of preferred diaphragm is littler.
Diaphragm preferably comprises above polyvinyl resin of 50 weight % or acrylic resin and its single face and has fusible diaphragm.The Young's modulus of polyvinyl resin or acrylic resin is low, and generally the raw material as diaphragm uses, and is preferred economically.Diaphragm can form diaphragm through single face is carried out bonding processing after creating the film of substrate, also can be with the various kinds of resin coextrusion, thus disposable manufacturing single face has fusible diaphragm.As commercially available article, can preferably use C.I.KASEI corporate system エ Network セ Le ガ one De FS etc.
A little less than the cohesive of preferred diaphragm.If cohesive is strong, residual bonding composition on the base material film after diaphragm is peeled off sometimes.In addition, the base material film distortion might be made when peeling off diaphragm, the homogeneity of base material film might be damaged.
< manufacturing approach of stacked film >
Stacked film of the present invention can through under the condition that satisfies following formula (1)～(3) with above-mentioned base material film and above-mentioned range upon range of manufacturing of diaphragm.
(base material film)
Base material film is become by polycarbonate resin, and thickness is 10～150 μ m, and thickness deviation is below ± 2 μ m, and the mean value of the birefringence (Δ n) in the face is 0.00001～0.00017, the birefringence of thickness direction (Δ n
Th) mean value be 0.00001～0.001.
(diaphragm)
The thickness of diaphragm is 10～100 μ m, and thickness deviation is below ± 1.5 μ m.
(range upon range of condition)
Range upon range of can carrying out through following method promptly, applies tension force respectively and after becoming the state of corrugationless for base material film and diaphragm in advance, pushes with rubber rollers etc. and carries out.
This is layered under the condition that satisfies following formula (1)～(3) and carries out.
10＜T
B＜200 (1)
10＜T
P＜150 (2)
1≤T
B/T
P≤10 (3)
Wherein, T
BRepresent when range upon range of the tension force (N/m) of per unit width in the base material film.T
PRepresent when range upon range of the tension force (N/m) of per unit width in the diaphragm.
Base material film is too smooth, and sliding is poor, uses separately to be difficult to be wound into web-like.Therefore, carried out the diaphragm of a face asperitiesization and base material film range upon range of and give sliding, be wound as the operation of web-like.But, if process stacked film, though sliding improve, can transfer printing asperities concavo-convex of diaphragm, on base material film, produce fine concavo-convexly, this concavo-convex optical property of base material film that makes reduces.
According to the present invention, do not produce micro concavo-convex in order to make base material film, through using the diaphragm of specific thickness deviation, when range upon range of, make the tension force that base material film and diaphragm are applied simultaneously, thereby obtain not having the base material film of micro concavo-convex in the scope of stipulating.T
BAnd T
PPreferable range be described below.
30＜T
B＜150 (1-1)
30＜T
P＜100 (2-1)
1≤T
B/T
P≤5 (3-1)
If T
BAnd T
PExcessive, the concavo-convex meeting of diaphragm is transferred on the base material film, on base material film, produces fine concavo-convex.In addition, if T
BAnd T
PToo small, produce fold etc. when range upon range of and can not be range upon range of equably, therefore not preferred.
(film volume)
The present invention comprises above-mentioned stacked film is rolled the used for optical part film volume that forms.From the productivity ratio aspect, the film width in the preferred film volume is wide.The film width is preferably 600～2,000mm, more preferably 800～2, the scope of 000mm.Process when carrying out edge trimming before film is rolled up, these preferred film width values are interpreted as the value behind the edge trimming.Therefore in addition, the film width that is suitable as optics is different because of its application target, can above-mentioned film be cut etc., and the appropriate change film is wide and use.
The winding tension T of per unit width when stacked film of the present invention is rolled the film forming volume
W(N/m) preferable range is described below.
20＜T
W＜200 (4)
T
WMore preferably satisfy following formula (4-1).
20＜T
W＜120 (4-1)
If T
WLittle, produce the dislocation etc. of reeling in the film volume, be difficult to obtain the film volume of homogeneous, therefore not preferred.If T
WExcessive, on base material film, produce fine concavo-convex, therefore not preferred.
The coiling length (the coiling length of film) of film volume can not have special restriction by processing aspect, the decision of productivity ratio aspect, but preferred 100～4, the scope of 000m.
(optics)
Stacked film of the present invention, after diaphragm peeled off, the parts that can be used as CD, touch panel etc. used.
CD fits on the substrate and obtains through peeling off base material film that diaphragm obtains from above-mentioned stacked film.Base material film plays the effect as the light-transmitting layer of CD.
As with the CD of the base material film among the present invention, can enumerate Blu-raydisc as light-transmitting layer.As its kind, the ROM type that only can read information recording layer is arranged, can read the R type with one-time write, the RE type that can read, writes and delete.As the substrate of CD, for example can enumerate polycarbonate resin, amorphous polyolefins is that resin, methacrylic resin etc. melt extrude and the substrate that forms, the substrate that is formed by thermosetting resin, but special optimization polycarbonate resin.
Embodiment
Below through embodiment the present invention is described in detail, but the present invention is not limited to this.Method below the mensuration of the rerum natura among the embodiment and evaluation are adopted is arranged again.
(1) viscosity average molecular weigh
The viscosity average molecular weigh of polycarbonate resin (M) is calculated by following formula through obtaining inherent viscosity [η] by the dichloromethane solution of concentration 0.7g/dl 20 ℃ viscosimetric analysis.
η
sp/c＝[η]+0.45×[η]
2c
[η]＝1.23×10
-4M
0.83
(wherein c=0.7, [η] is inherent viscosity)
(2) film thickness
For base material film before the stacked guard film (polycarbonate membrane) and diaphragm, become the rectangular mode that both sides 500mm is long, 50mm is wide with center broad ways from the film width, obtain 1, the sample of 000mm * 50mm size.For the flow direction of film, obtain 5 these rectangle samples at interval with 500mm.Length direction (1 for this rectangle sample; 000mm is long); With 50mm at interval, the micrometer of use Mitutoyo corporate system is measured the thickness (from measuring at interval with 50mm apart from the position of film end 25mm, in 1 rectangle sample, measuring 20 points) of the core of short side direction (50mm is long).Then, obtain the average thickness value of 100 of measuring points, with its thickness as film.In addition, these rectangle samples after the film thickness deviation, birefringence (Δ n) and birefringence (the Δ n of thickness direction in the face stated
Th) mensuration in also use.
(3) film thickness deviation
In the assay method of the employing micrometer of above-mentioned (2); Might ignore the thickness deviation that possibly beyond measuring point, exist; For example therefore the band shape of wide degree, thin-line-shaped thickness deviation use Anirtsu corporate system film thickness tester KG601 METHOD FOR CONTINUOUS DETERMINATION thickness deviation.Measure film and used the 5 length of a film quadrangular membranes that use in the mensuration of (2).For this each sample, with the thickness distribution of above-mentioned film thickness tester METHOD FOR CONTINUOUS DETERMINATION long side direction.(1,000mm * 50mm) obtains maximum and poor (scope of thickness) of minimum of a value of the thickness of record, and wherein that thickness range is maximum value is as the thickness deviation of this film for above-mentioned 5 films.
(4) birefringence (Δ n) in the face and birefringence (the Δ n of thickness direction
Th)
The rectangle film of the 5 plate substrate films (polycarbonate membrane) that use in the mensuration by (2) is so that the mode that roughly arrives the center that locates of (2) is processed 50mm square working sample.Obtain 20 samples at the film width, the rectangle sample has 5, therefore amounts to and obtains 100 test samples.For these samples, using the measuring device manufactured by Oji birefringence measuring machine KOBRA-21ADH, in its slow axis or fast axis (phase advancing axis), changing the angle of incidence, measured delay value (retardation).By the value of the length of delay under each incident angle and the film thickness d that locates, obtain refractive index n x, ny and nz.Obtain birefringence Δ n and Δ n in the face by these values through following formula again
ThBy the mean value of on average obtaining Δ n of whole determination datas, with its Δ n as this film.In addition, with the difference of the maximum of Δ n and minimum of a value deviation (fluctuation) as this Δ n.Likewise, for Δ n
ThAlso obtain mean value and deviation.
Δn＝|nx-ny|
Δn
th＝|(nx+ny)/2-nz|
(nx representes the refractive index of the slow-axis direction in the face, and ny representes the refractive index of quick shaft direction, and nz representes the refractive index of thickness direction.)
Have again, as the mensuration of above-mentioned (2)～(4) order, with measure with the birefringence of thickness direction in the mensuration of the film thickness deviation of (3), (4) face, the order of the thickness measurement of (2) implements.This is because the mensuration of (2) is to adopt the evaluation of the contact of micrometer, therefore might produce damage to sample.
(5) total light transmittance of base material film
Obtain the sample of 50mm * 150mm size from 3 positions of width of film, use the Japanese electric look system turbidimetric analysis turbidimetry device COH-300A of industrial group to measure.For each sample, measure 5 points, to add up to 15 mean value as total light transmittance.
(6) used the yield evaluation in making of the CD of multilayer film for optical component
CD media (Blu-ray Disc) making that is described below.
(moulding of disc board)
At first; Using viscosity average molecular weigh is 15; 000 polycarbonate resin (Supreme Being people changes into corporate system PANLITE AD-5503) is used resin as optic disc base board; Adopt CD with injection (mo(u)lding) machine (the system SD-40E of Sumitomo Heavy Industries), the disc board of moulding external diameter 120mm φ, internal diameter 15mm φ, thick 1.1mm.Have, during injection moulding, in order to form the pit that has write down data message in monoplanar surface, the punch die of therefore Blu-ray Disc ROM being used is installed to and carries out moulding in the mould again.
(making of Blu-ray Disc)
This disc board is supplied with Blu-ray Disc laminating apparatus (SHIBAURAMECHATRONICS corporate system メ PVC ウ ス F-1), make Blu-ray Disc.Except this disc board, to メ PVC ウ ス F-1 supply with the stacked film stated after magnetron sputtering that reflectance coating forms the KOBELCO RESEARCH corporate system Ag alloy of usefulness forms with film with target, as light-transmitting layer, as the big Japanese ink chemical industrial company of the adhesive resin of this film and disc board make EX-8410, as the hard conating of Blu-ray Disc Sony Chemical & Information Device corporate system SK-1110 with resin.In メ PVC ウ ス F-1, after employing sputters at the reflectance coating of disc board formation Ag alloy, with the adhesive resin spin coating.
After the stacked film volume that forms usefulness from the light-transmitting layer of other supply is only pulled out base material film, be die-cut into plate-like, the film that this is die-cut fits to aforesaid substrate, forms light-transmitting layer through the ultraviolet ray irradiation.Then, the spin coating hard conating makes it to solidify with resin and through the ultraviolet ray irradiation, thereby obtains Blu-ray Disc.
(inspection of Blu-ray Disc)
Dish for 11 that obtains like this; Use dr.Schwab Inspection TechnologyGmbH system IQPC-Blu; With the foreign matter of light-transmitting layer face, concavo-convexly detect as shortcoming; Through having length or width is that whether qualified concavo-convex dish more than the 300 μ m be set at the defective judgement of carrying out, and obtains coiling the yield of manufacturing.Yield uses the yield when having made about 300 dishes.
(7) used the electric signal characteristic evaluation of the CD of multilayer film for optical component
For the passed examination dish that obtains in above-mentioned (6), use PULSTEC INDUSTRIAL corporate system ODU-1000, estimate shake (Jitter), error rate electric signal characteristics such as (SER).During evaluation, regulate the optical aberration correcting amount, implement according to the average thickness of light-transmitting layer.
(8) melt viscosity of polycarbonate resin
The melt viscosity of the polycarbonate resin pellet that uses in the system film uses the CAPILOGRAPH 1D of the smart machine corporate system of Japan to measure.Capillary uses the capillary of diameter 1.0mm, length 10mm.Regulate spin speed so that shear rate is 100s
-1, the melt viscosity of mensuration arbitrary temp.
(9) tension force
The tension force that base material film and diaphragm are applied is obtained with the film width of this moment by being employed in the measured value that the tension detection machine that is provided with in each operation obtains.
Embodiment 1
(the system film of base material film)
That uses the drying under reduced pressure formula puts the dish drying machine, Supreme Being people is changed into corporate system bisphenol-A homopolymers polycarbonate pc (trade name AD-5503, Tg:145 ℃, viscosity average molecular weigh: pellet 15,000) 120 ℃ dry 3 hours down.It is put in the heated hopper that melt extrudes machine that is heated to 110 ℃, under 260 ℃ of extruder barrel temperature, melt extrude.In order to remove the foreign matter of molten polymer, having used average mesh is the fabric discoid filter of stainless steel nonwoven of 10 μ m.
Use film forming apparatus system film shown in Figure 1.In mouth mould (1), used and be set at the T type mouth mould (the melt viscosity 260Pas of polycarbonate resin) that molten resin temperature reaches 260 ℃ lip aperture 1mm.Chill roll (2,3,4) uses the chill roll of 3 diameter 350mm, and the temperature of the chill roll (the 1st chill roll (2)) of the initial contact of molten resin is 140 ℃, and the temperature of the 2nd chill roll (3) is 135 ℃, and the temperature of remaining roller (3) is set at 130 ℃.The distance (L1 among Fig. 2) of die lip leading section and the 1st cooling roll surface is 15mm; The horizontal level (L2 among Fig. 2) of the 1st chill roll (2) and die lip adopts and appears as clockwise position from the rotation of the 1st chill roll and see that the die lip front end is the position on 70mm right side apart from the center of chill roll.Regulate the discharge rate of polycarbonate resin and the transporting velocity of film,, implemented down at speed 10m/ minute so that the thickness of film reaches 92 μ m.
(diaphragm range upon range of)
Use the laminating apparatus shown in 7 among Fig. 1 to implement the range upon range of of base material film and diaphragm.The tension force of base material film is regulated with the speed difference between the nip rolls shown in 5 among Fig. 1 and 8 when range upon range of, is reaching enforcement under the 90N/m.Diaphragm is the position shown in 6 from Fig. 1, is that the diaphragm (C.I.KASEI corporate system エ Network セ Le ガ one De FS) of 30 μ m adds tension force 40N/m with thickness, supplies to laminating apparatus.The tension force of diaphragm is regulated with the speed difference between diaphragm (6) and nip rolls (8).The base material film before fitting and the characteristic of diaphragm are as shown in table 1.
(coiling)
Stacked film is through becoming 1 with the both ends excision, and the film that 000mm is wide adopts the up-coiler shown in 9 among Fig. 1 to process film volume (coiling length 500m).This moment, winding tension can be regulated with the speed difference between nip rolls shown in 8 among Fig. 1 and up-coiler (9), under 80N/m, implemented.
(cutting)
Use the system Slitter KE-70 of sheet ridge Mechanology Inc., wide by 1 by what obtain, wide * 400m length that the film volume of 000mm is cut into 140mm.Winding tension during cutting is 80N/m.
(manufacturing of Blu-ray Disc)
Use メ PVC ウ ス F-1 to make Blu-ray Disc.Its result obtains dish with high yield.For being judged to be qualified dish; Carried out the electric signal characteristic evaluation, the result can confirm to satisfy electric signal characteristic standards such as the shake, error rate of record in the BD-ROM white paper (White Paper) of Blu-ray disc alliance (Blu-ray Disc Association) distribution.On the other hand, the error rate etc. that is judged to be bad dish is outside standard.
Know that by above stacked film of the present invention is excellent as used for optical part, be particularly suitable for forming the light-transmitting layer of high density compact disc.
Except regulating Access Speed so that as the average thickness of the polycarbonate membrane of base material film is the 78 μ m, likewise obtains the volume of stacked film with embodiment 1.The base material film before fitting and the characteristic of diaphragm are as shown in table 1.
The tension force that when range upon range of base material film is applied is 90N/m, and the tension force that diaphragm is applied is 40N/m.
After likewise cutting with embodiment 1, carry out Blu-ray Disc and make.Its result obtains dish with high yield.Be judged to be qualified dish and satisfied electric signal characteristic standards such as shake, error rate.
Embodiment 3
Except regulating Access Speed so that as the average thickness of the polycarbonate membrane of base material film is the 67 μ m, likewise obtains the film volume of stacked film with embodiment 1.The base material film before fitting and the characteristic of diaphragm are as shown in table 1.The tension force that when range upon range of base material film is applied is 80N/m, and the tension force that diaphragm is applied is 40N/m.
After likewise cutting with embodiment 1, carry out Blu-ray Disc and make.Its result obtains dish with high yield.Be judged to be qualified dish and satisfied electric signal characteristic standards such as shake, error rate.
Comparative example 1
Except using eastern beautiful processing of films corporate system TORETEC 7332, likewise obtained the film volume of stacked film with embodiment 1 as the diaphragm.The base material film before fitting and the characteristic of diaphragm are as shown in table 1.
After likewise cutting with embodiment 1, carry out Blu-ray Disc and make.Its result is low yield.
Comparative example 2
Except using Sun A.Kaken corporate system SUNYTECT PAC-2 as the diaphragm, the film that has likewise obtained stacked film with embodiment 1 is rolled up.The base material film before fitting and the characteristic of diaphragm are as shown in table 1.
After likewise cutting with embodiment 1, carry out Blu-ray Disc and make.Its result is low yield.
Can know that by above experiment multilayer film for optical component of the present invention has the optical characteristics of the light-transmitting layer that is suitable for forming high density compact disc, can make CD with high yield.
Table 1
Table 1 (continuing)
Stacked film of the present invention, if peel off diaphragm, then become have little birefringence, optically isotropic film that good surface smoothness, demonstration are excellent.In addition, stacked film of the present invention becomes the excellent film volume of outward appearance because therefore excellent in sliding property can easily be wound as web-like.In addition, when stacked film of the present invention used as the parts of CD etc., the generation rate of substandard products was few in CD.In addition, peel off the film that diaphragm forms by stacked film of the present invention, show excellent optical isotropy, the light-transmitting layer that can be suitable as CD uses.In addition, to be peeled off film that diaphragm the forms CD as light-transmitting layer by stacked film of the present invention, electric signal characteristics such as its shake, error rate are excellent.In addition, according to the manufacturing approach of stacked film of the present invention, the stacked film that becomes the film with good surface smoothness when diaphragm peeled off can be provided.
Stacked film of the present invention can be used for the manufacturing of opticses such as CD.
Claims (6)
1. a multilayer film for optical component has diaphragm in the base material film laminated, and base material film is become by polycarbonate resin, satisfies:
(i) thickness is 10～150 μ m,
(ii) thickness deviation is below ± 2 μ m,
(iii) the mean value of the birefringence Δ n in the face is 0.00001～0.00017,
The (iv) birefringence Δ n of thickness direction
ThMean value be 0.00001～0.001,
(v) total light transmittance is more than 85%,
Said polycarbonate resin is to be obtained by the dihydroxy composition that has 50 moles of % bisphenol-As at least, and viscosity average molecular weigh is 10,000～40,000;
Diaphragm comprises 50 weight % above polyvinyl resin or acrylic resin, and its single face has cohesive, satisfies:
(i) thickness is 10～100 μ m,
(ii) thickness deviation is below ± 1.5 μ m.
2. multilayer film for optical component according to claim 1, wherein, the viscosity average molecular weigh of polycarbonate resin is 12,000～19,000.
3. multilayer film for optical component according to claim 1, wherein, base material film is the film that adopts extrusion by melting to form.
4. a used for optical part film volume forms each described multilayer film for optical component coiling in the claim 1～3.
5. CD requires each described multilayer film for optical component in 1～3 to peel off diaphragm and the base material film that obtains accessory rights, pastes on the substrate and obtains as light-transmitting layer.
6. the manufacturing approach of a multilayer film for optical component is that base material film is become by polycarbonate resin with the manufacturing approach of base material film and the range upon range of multilayer film for optical component that forms of diaphragm, satisfies:
(i) thickness is 10～150 μ m,
(ii) thickness deviation is below ± 2 μ m,
(iii) the mean value of the birefringence Δ n in the face is 0.00001～0.00017,
The (iv) birefringence Δ n of thickness direction
ThMean value be 0.00001～0.001,
(v) total light transmittance is more than 85%,
Said polycarbonate resin is to be obtained by the dihydroxy composition that has 50 moles of % bisphenol-As at least, and viscosity average molecular weigh is 10,000～40,000;
Diaphragm comprises 50 weight % above polyvinyl resin or acrylic resin, and its single face has cohesive, satisfies:
(i) thickness is 10～100 μ m,
(ii) thickness deviation is below ± 1.5 μ m,
Under the condition that satisfies following formula (1)～(3), carry out range upon range of:
10＜T
B＜200 (1)
10＜T
P＜150 (2)
1≤T
B/T
P≤10 (3)
Wherein, T
BRepresent when range upon range of the tension force of per unit width in the base material film, unit is N/m, T
PRepresent when range upon range of the tension force of per unit width in the diaphragm, unit is N/m.
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| JP2007153667 | 2007-06-11 | ||
| JP153667/2007 | 2007-06-11 | ||
| PCT/JP2008/060628 WO2008153032A1 (en) | 2007-06-11 | 2008-06-04 | Multilayer film for optical component |
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| CN101678641A CN101678641A (en) | 2010-03-24 |
| CN101678641B true CN101678641B (en) | 2012-11-28 |
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| JP (1) | JP4898913B2 (en) |
| CN (1) | CN101678641B (en) |
| TW (1) | TWI428912B (en) |
| WO (1) | WO2008153032A1 (en) |
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| TWI488891B (en) * | 2009-12-22 | 2015-06-21 | Mitsubishi Chem Corp | And a material for a resin molded body for a semiconductor light emitting device |
| JP5318020B2 (en) * | 2010-03-30 | 2013-10-16 | 富士フイルム株式会社 | Method for producing functional film |
| TW201213128A (en) * | 2010-07-05 | 2012-04-01 | Sumitomo Chemical Co | Laminate and process for preparing the same |
| JP5598202B2 (en) * | 2010-09-21 | 2014-10-01 | 凸版印刷株式会社 | Manufacturing method of optical sheet |
| WO2013051553A1 (en) * | 2011-10-07 | 2013-04-11 | 住友化学株式会社 | Method for manufacturing polarizer |
| JP2013208855A (en) * | 2012-03-30 | 2013-10-10 | Fujifilm Corp | Method and device for producing functional film |
| JP2014030940A (en) * | 2012-08-02 | 2014-02-20 | Mitsubishi Plastics Inc | Method for manufacturing a laminate, laminate, and electronic device including the laminate |
| JP7000156B2 (en) | 2015-09-07 | 2022-02-04 | 凸版印刷株式会社 | Protective film for wavelength conversion sheet, wavelength conversion sheet and backlight unit |
| WO2017221783A1 (en) * | 2016-06-24 | 2017-12-28 | 東レ株式会社 | Multilayer film |
| JP6306675B1 (en) * | 2016-11-28 | 2018-04-04 | 住友化学株式会社 | Method for producing polarizing laminated film with protective film and method for producing polarizing plate |
| CN110484155A (en) * | 2019-07-26 | 2019-11-22 | 新纶科技（常州）有限公司 | Unlocked by fingerprint mobile phone 2.5D protective film and preparation method thereof under a kind of screen |
| JP6967679B2 (en) * | 2020-03-10 | 2021-11-17 | 住友化学株式会社 | Laminated optical film |
| WO2024029473A1 (en) | 2022-08-02 | 2024-02-08 | 三菱瓦斯化学株式会社 | Multilayer body |
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| CN101678641A (en) | 2010-03-24 |
| WO2008153032A1 (en) | 2008-12-18 |
| TWI428912B (en) | 2014-03-01 |
| TW200912921A (en) | 2009-03-16 |
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