CN101545987B - Light diffuser - Google Patents
Light diffuser Download PDFInfo
- Publication number
- CN101545987B CN101545987B CN2009101302065A CN200910130206A CN101545987B CN 101545987 B CN101545987 B CN 101545987B CN 2009101302065 A CN2009101302065 A CN 2009101302065A CN 200910130206 A CN200910130206 A CN 200910130206A CN 101545987 B CN101545987 B CN 101545987B
- Authority
- CN
- China
- Prior art keywords
- resin
- light
- light diffusing
- diffusing sheet
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- 238000012695 Interfacial polymerization Methods 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- CUUYDUQLVLQSGI-UHFFFAOYSA-N OP(O)OP(O)O.C(CCCCCCCC)C1=C(C=CC=C1)C(O)C(CO)(CO)CO Chemical class OP(O)OP(O)O.C(CCCCCCCC)C1=C(C=CC=C1)C(O)C(CO)(CO)CO CUUYDUQLVLQSGI-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
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- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 210000002469 basement membrane Anatomy 0.000 description 1
- XJHABGPPCLHLLV-UHFFFAOYSA-N benzo[de]isoquinoline-1,3-dione Chemical compound C1=CC(C(=O)NC2=O)=C3C2=CC=CC3=C1 XJHABGPPCLHLLV-UHFFFAOYSA-N 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
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- 229910052797 bismuth Inorganic materials 0.000 description 1
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- 230000006208 butylation Effects 0.000 description 1
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- 239000011575 calcium Substances 0.000 description 1
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- 239000003054 catalyst Substances 0.000 description 1
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- 150000004775 coumarins Chemical class 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- GLOQRSIADGSLRX-UHFFFAOYSA-N decyl diphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OCCCCCCCCCC)OC1=CC=CC=C1 GLOQRSIADGSLRX-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- VZEGPPPCKHRYGO-UHFFFAOYSA-N diethoxyphosphorylbenzene Chemical compound CCOP(=O)(OCC)C1=CC=CC=C1 VZEGPPPCKHRYGO-UHFFFAOYSA-N 0.000 description 1
- WZPMZMCZAGFKOC-UHFFFAOYSA-N diisopropyl hydrogen phosphate Chemical compound CC(C)OP(O)(=O)OC(C)C WZPMZMCZAGFKOC-UHFFFAOYSA-N 0.000 description 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N dimethylmethane Natural products CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- KUMNEOGIHFCNQW-UHFFFAOYSA-N diphenyl phosphite Chemical compound C=1C=CC=CC=1OP([O-])OC1=CC=CC=C1 KUMNEOGIHFCNQW-UHFFFAOYSA-N 0.000 description 1
- AASUFOVSZUIILF-UHFFFAOYSA-N diphenylmethanone;sodium Chemical compound [Na].C=1C=CC=CC=1C(=O)C1=CC=CC=C1 AASUFOVSZUIILF-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
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- XUGNVMKQXJXZCD-UHFFFAOYSA-N isopropyl palmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC(C)C XUGNVMKQXJXZCD-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical class CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 1
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 1
- CSWFWSPPZMEYAY-UHFFFAOYSA-N octadecyl dihydrogen phosphite Chemical compound CCCCCCCCCCCCCCCCCCOP(O)O CSWFWSPPZMEYAY-UHFFFAOYSA-N 0.000 description 1
- KCRLWVVFAVLSAP-UHFFFAOYSA-N octyl dihydrogen phosphite Chemical compound CCCCCCCCOP(O)O KCRLWVVFAVLSAP-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- CBFCDTFDPHXCNY-UHFFFAOYSA-N octyldodecane Natural products CCCCCCCCCCCCCCCCCCCC CBFCDTFDPHXCNY-UHFFFAOYSA-N 0.000 description 1
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- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- PXDJXZJSCPSGGI-UHFFFAOYSA-N palmityl palmitate Chemical compound CCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCC PXDJXZJSCPSGGI-UHFFFAOYSA-N 0.000 description 1
- 238000007415 particle size distribution analysis Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- XRBCRPZXSCBRTK-UHFFFAOYSA-N phosphonous acid Chemical compound OPO XRBCRPZXSCBRTK-UHFFFAOYSA-N 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- ZMYXZXUHYAGGKG-UHFFFAOYSA-N propoxysilane Chemical compound CCCO[SiH3] ZMYXZXUHYAGGKG-UHFFFAOYSA-N 0.000 description 1
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 229940093625 propylene glycol monostearate Drugs 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical class [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
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- 229940035048 sorbitan monostearate Drugs 0.000 description 1
- 235000011076 sorbitan monostearate Nutrition 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical group C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- XYJRNCYWTVGEEG-UHFFFAOYSA-N trimethoxy(2-methylpropyl)silane Chemical compound CO[Si](OC)(OC)CC(C)C XYJRNCYWTVGEEG-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- QQBLOZGVRHAYGT-UHFFFAOYSA-N tris-decyl phosphite Chemical compound CCCCCCCCCCOP(OCCCCCCCCCC)OCCCCCCCCCC QQBLOZGVRHAYGT-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical class [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a light diffuser satisfying light characteristics without recognizing light source (lamp) shape on back of resin molding product. The diffuser is composed of a first layer and a second layer, and has thickness of 0.1-5.0mm, wherein the first layer is formed with transparent thermoplastic resin (A) with relative 100 wt%, and resin composition (I) containing light diffusant (B) with average granule diameter 0.1-50<mu>m of 0.05-10wt%; the second layer is formed with transparent thermoplastic resin (C) with relative 100 wt%, and resin composition (II) containing light light-storing agent (D) with average granule diameter 1-30<mu>m of 0.05-10wt%.
Description
Technical field
The present invention relates to have desired thickness of slab, adjust optical characteristics easily and have the light diffusing sheet of excellent light diffusing.More particularly, the layer and light diffusing and the excellent light diffusing sheet of brightness that relate to range upon range of forming by resin combination, wherein, said resin combination is that light diffusing agent and light-accumulating agent are added into respectively in the transparent resin and form.
Background technology
In the light diffusing sheet of the part of the full run-down type unit of LCD TV and the Switch of end face irradiation type unit, ligthing paraphernalia cover and various device etc., the unit inscape used as various light sources; Use by with acryl resin or polycarbonate resin as matrix resin, and the light diffusing sheet that forms to the resin combination that has wherein added various light diffusing agents.
In these purposes; If use transparent thermoplastic resin, then because printing opacity can be seen light source through resin; Can not let the people discern so wait in expectation and be positioned at resin forming product light source (lamp) shape behind, and give the material that does not damage the light diffusing of light-source brightness as far as possible.
At present; Higher light diffusing and brightness are given in requirement, carry out all improved research from aspects such as the composition of light diffusing agent, refractive index, shape of particle, particle diameters, still; The optical property that is embodied depends on the light diffusing agent that is cooperated; Therefore, present situation is the improvement of depending alone light diffusing agent, has been difficult to reach the optical property of the level that requires.
As one of method that addresses this problem; Staight downward type backlight is disclosed with polycarbonate resin light diffusion layer lamination, the polycarbonate resin film and the polycarbonate resin plate that contains the thickness 0.5～3mm of light diffusing agent of this light diffusion layer lamination the is range upon range of surface the has thickness 0.05～0.3mm of space pattern in patent documentation 1.But the price of thin slice that is formed with space pattern on the surface is high, and its operation easier is also very high.In addition, also exist the problem that produces surperficial dazzle.
On the one hand, after light-accumulating agent receives the optical excitation of ultraviolet ray etc., if stop its irradiation, then still can carry out through for a long time luminous, so show purposes (patent documentation 2, patent documentation 3) nights such as oriented identification or pilot lamp that are used for taking refuge.In patent documentation 4, disclose a kind of light diffusing sheet, it is the strontium aluminate class light-accumulating agent of 1～20 μ m that this light diffusing sheet uses the mean grain size of 0.01～1 weight portion.But, in the method,, surpass the problem of stipulating so exist the reduction of brightness or total light transmittance because light-accumulating agent is sneaked in whole plate.In addition, about the observability of light source (lamp) shape, comparing with product does not in the past have to find too big difference yet.
(patent documentation 1) TOHKEMY 2004-163575 communique
(patent documentation 2) japanese kokai publication hei 07-240187 communique
(patent documentation 3) TOHKEMY 2000-156107 communique
(patent documentation 4) TOHKEMY 2006-335973 communique
Summary of the invention
The object of the invention is to provide a kind of optical characteristics that satisfies, and can not let the people discern the light diffusing sheet of synthetic resin light source (lamp) shape behind.
The result that the inventor concentrates one's attention on to study to achieve these goals finds; Contain in the layer that contains light diffusing agent through range upon range of or coating among the transparent thermoplastic resin and the transparent resin light-accumulating agent layer; Can access and have the more light diffusing sheet of high optical property, accomplish the present invention thus.
That is, following light diffusing sheet can be provided according to the present invention.
1. light diffusing sheet; It is to comprise the ground floor and the second layer; And thickness is the light diffusing sheet of 0.1～5.0mm; Wherein, said ground floor is by the transparent thermoplastic resin (A) with respect to 100 weight portions, and containing 0.05～10 weight portion mean grain size is resin combination (I) formation of the light diffusing agent (B) of 0.1～50 μ m; The said second layer is by the transparent resin (C) with respect to 100 weight portions, and containing 0.01～9 weight portion mean grain size is resin combination (II) formation of the light-accumulating agent (D) of 1～30 μ m.
2. like above-mentioned 1 described light diffusing sheet; Wherein, transparent thermoplastic resin (A) be selected from by polycarbonate resin, vibrin, aromatic vinyl class monomer and have low alkyl group (methyl) alkyl acrylate multipolymer, (methyl) acryl resin and have a kind of resin or the two or more resin compounds in the group that the resin of ester ring type structure forms.
3. like above-mentioned 1 described light diffusing sheet, wherein, light diffusing agent (B) is the silicon compounds.
4. like above-mentioned 1 described light diffusing sheet, wherein, second layer thickness is 1～200 μ m.
5. like above-mentioned 1 described light diffusing sheet, wherein, transparent resin (C) is a kind of resin or the two or more resin compound that is selected from the group of being made up of acrylic resin, polycarbonate resin, melamine resin and silicones.
6. like above-mentioned 1 described light diffusing sheet, wherein, the content of light-accumulating agent (D) is 0.03～7 weight portion.
7. like above-mentioned 1 described light diffusing sheet, wherein, the light absorption wavelength of light-accumulating agent (D) is 200nm～500nm.
8. like above-mentioned 1 described light diffusing sheet, wherein, light-accumulating agent (D) is the strontium aluminate compounds.
Description of drawings
Fig. 1 is the diagrammatic cross-section of mean flow rate evaluating apparatus in the light diffusing sheet of the present invention.
Fig. 2 is the floor map of mean flow rate evaluating apparatus in the light diffusing sheet of the present invention.
Fig. 3 is for being used for forming at the polycarbonate resin thin slice device (method that is coated with the roller) figure of light-accumulating agent layer in the embodiment of the invention.
The explanation of Reference numeral:
1 light diffusing sheet
2 white reflecting resin plates
3～10 light sources (cold-cathode tube)
11～19 measuring points
20 thin slices extruded continuously
21 are used to supply with the nozzle that contains light-accumulating agent coating
22 are used to supply with the jet hole of the about 3mm of diameter of coating
The roller of the about 80mm of diameter that 23 periphery materials are made up of rubber
Embodiment
Below specify the present invention.
< light diffusing sheet >
The thickness of light diffusing sheet of the present invention is 0.1～5.0mm, is preferably 0.3～4.0mm, more preferably 0.5～3.0mm.If thickness is not enough to 0.1mm, then be inappropriate for the present invention owing to rigidity is not enough, if thickness surpasses 5.0mm, then consideration and impracticable from the weight aspect, thereby not preferred.
In addition, the total light transmittance of light diffusing sheet of the present invention is more than 40%, is preferably more than 45%, more preferably more than 50%.If total light transmittance is low, then brightness reduces, thereby not preferred.
And then the haze value of light diffusing sheet of the present invention is more than 98%, is preferably more than 98.5%, more preferably more than 99%.If haze value is low, then see through light diffusing sheet and can see light source, thereby not preferred.
< ground floor >
The thickness of above-mentioned light diffusing sheet, total light transmittance and haze value depend on to a great extent becomes thermoplastic resin sheet this light diffusing sheet base material, that be combined with light diffusing agent (ground floor).
The thickness that becomes the thermoplastic resin sheet of this light diffusing sheet base material is preferably 0.08～4.9mm, and more preferably 0.28～3.9mm further is preferably 0.48～2.9mm,
The total light transmittance that becomes the thermoplastic resin sheet of this light diffusing sheet base material is preferably more than 50%; And haze value is preferably more than 98%, and said thermoplastic resin sheet adopts makes light diffusing agent be contained in method in transparent thermoplastic resin's sheet, further light diffusing agent is contained in the transparent thermoplastic resin sheet and with surface configuration is processed into concavo-convex method.In addition, this thermoplastic resin sheet also can be the duplexer of light diffusing sheet and non-light diffusing sheet.
The light diffusing agent that light diffusing agent is contained in use in the method for thermoplastic resin sheet is microgranular; For example can enumerate with the glass granules is the inorganic particles of representative; Organic fine particles such as polystyrene resin, (methyl) acryl resin, silicones, wherein preferred organic fine particles.
As this organic fine particles, preferred crosslinked organic fine particles, it is that at least a portion is crosslinked in manufacture process, and in the process of moldable resin, does not deform during practical application, and keeps the particulate of graininess.Promptly; Can not be dissolved in the particulate in the thermoplastic resin even more preferably be heated to the forming temperature (for example the forming temperature of polycarbonate resin is about 350 ℃) of thermoplastic resin yet; Specifically, can enumerate crosslinked (methyl) acryl resin, the organic fine particles of silicones.As especially preferred object lesson, can enumerate with partial cross-linked methyl methacrylate as the polymer particles of matrix, have the nuclear that gathers (butyl acrylate)/the gather shell of (methyl methacrylate) polymkeric substance, have the nuclear/shell morphology that comprises polyvinyl nuclear of rubber-like and shell polymkeric substance [the for example trade name パ ラ ロ イ De EXL-5136 of Rohm & Haas manufactured], have the silicones [for example Toshiba's organosilicon (strain) make ト ス パ one Le 120] of crosslinking silicone key.Especially preferably use the silicon compounds of silicones etc.
The mean grain size of above-mentioned microgranular light diffusing agent is 0.1～50 μ m, is preferably 0.5～30 μ m, more preferably 1～20 μ m.The particle diameter of said light diffusing agent is the weight average particle diameter of being measured by Ku Erte counting (Coulter counter) method, and analyzer adopts population, the particle size distribution analysis appearance MODEL Zm of day section of Co., Ltd. machine.If weight average particle diameter less than 0.1 μ m then can't obtain sufficient light diffusing, the face photism is poor; If surpass 50 μ m; Then can't obtain sufficient light diffusing, the face photism is poor, in order to obtain sufficient light diffusion effect; Increase its use level, have the defective of the impaired and uneven luminance property increase of photopermeability.
The cooperation ratio of transparent thermoplastic resin and light diffusing agent is that with respect to the transparent thermoplastic resin of 100 weight portions, light diffusing agent is 0.05～10 weight portion, is preferably 0.1～8 weight portion, especially is preferably 0.2～7 weight portion.If the use level of light diffusing agent is less than 0.05 weight portion, then light diffusing is not enough, and light source sees through and can see sometimes.On the one hand, if the use level of light diffusing agent surpasses 10 weight portions, then light penetration reduces, and can't obtain required brightness sometimes.
In addition; Be processed into concavo-convex method as surface configuration with thermoplastic resin sheet; Can enumerate the method that the stamp chill roll that utilizes roller surface to implement to have the reverse pattern of required pattern comes the thermoplastic resin sheet that clamping melt extrudes; Perhaps thermoplastic resin sheet is clamped in the surface and has between the flat board of reverse pattern of required pattern, and be heated to heat distortion temperature above after, the method for pressurizeing etc.
In addition; In the thermoplastic resin sheet that becomes the light diffusing sheet base material; For example can enumerate polycarbonate resin, polyethylene terephthalate, polybutylene terephthalate, gather 2 as thermoplastic resin (A), the vibrin of 6-(ethylene naphthalate) etc., polyvinyl resin, propylene-ethylene copolymers, polystyrene resin, aromatic vinyl class monomer and have (methyl) acryl resin, the norborneol vinyl monomer of the multipolymer, terephthalic acid (TPA)-monoethylene glycol-cyclohexyl dimethanol multipolymer, polymethylmethacrylate etc. of (methyl) alkyl acrylate of low alkyl group ring-opening polymerization polymer hydrogenation thing, norborneol vinyl monomer and can with the hydrogenation thing of two keys parts (comprising aromatic rings) of the ring opening copolymer thing hydrogenation thing of other monomers of this norborneol vinyl monomer ring opening copolymer, vinyl aromatic same clan monomer-polymer and vinyl aromatic monomers with can be with the resin with ester ring type structure of the hydrogenation thing of the two keys parts of multipolymer (comprising aromatic rings) of other monomers of this vinyl aromatic monomers copolymerization etc. etc.Wherein, optimization polycarbonate resin, vibrin, aromatic vinyl class monomer and have (methyl) alkyl acrylate of low alkyl group multipolymer, (methyl) acryl resin, have the resin of ester ring type structure etc., especially optimization polycarbonate resin.Below, the polycarbonate resin of preferred use is described.
The preferred polycarbonate resin that uses among the present invention typically refers to through interfacial polymerization or melt phase polycondensation and makes binary phenol and carbonic ester presoma react the resin that obtains.As the typical example of binary phenol, can enumerate 2, two (4-hydroxy phenyl) propane (being referred to as " bisphenol-A " usually), 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-methylbutanes, 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 of 1-; 3,5-trimethyl-cyclohexane, 9, two { (4-hydroxy-3-methyl) phenyl } fluorenes and the α of 9-; α '-two (4-hydroxy phenyl)-diisopropyl benzene etc., wherein, preferred bisphenol-A.These binary phenol can use separately, also can two or more mixing use.
As the carbonic ester precursor; Use carbonylic halide (Carbonyl halide), carbonic ester or haloformate (Ha ロ ホ Le メ one ト) etc.; Specifically, can enumerate the bishaloformate etc. of phosgene (Phosgene), diphenyl carbonate or binary phenol.
When above-mentioned binary phenol and carbonic ester precursor being reacted make polycarbonate resin, also can use catalyzer, end to stop anti-oxidant of agent, binary phenol etc. as required.In addition; Polycarbonate resin can be with the branched polycarbonate resin of copolymerization in addition of the multifunctional aromatics more than the trifunctional; Also can be with aromatic series or the aliphatic two functional carboxylic acid polyestercarbonate resin of copolymerization in addition; In addition, can also be the potpourri that two or more gained polycarbonate resins are mixed.
The molecular weight of polycarbonate resin is generally 15000～40000 with viscosity-average molecular weight (M) expression, is preferably 18000～35000.The said viscosity-average molecular weight of the present invention is meant the 0.7g polycarbonate resin is dissolved in the 100ml methylene chloride and obtains solution under 20 ℃ temperature, obtains specific viscosity (η from this solution
Sp), and substitution following formula and the viscosity-average molecular weight that calculates.
η
sp/c＝[η]+0.45×[η]
2c
[η]＝1.23×10
-4M
0.83
(wherein, c=0.7, [η] is limiting viscosity)
According to desired performance in the practicality, and as required, can add known various adjuvant, polymkeric substance etc. among the thermoplastic resin composition who uses in the ground floor of the present invention (I).For example; In order to suppress to be exposed to for a long time the variable color of the synthetic resin that the light time produces; The ultraviolet light absorber of fast light stabilizing agent, benzotriazole, benzophenone, triazines and the malonic acid class of hindered amines can be added, also these adjuvants can be and used.
< second layer >
Light diffusing sheet of the present invention is the light diffusing sheet that is formed with light-accumulating agent layer (second layer) in the one side at least of said thermoplastic resin sheet (ground floor).
The light-accumulating agent that uses among the present invention is as the normally used light-accumulating agent of the light-accumulating agent of synthetic resin, can enumerate the sulfide-based light-accumulating agent of CaS:Bi, CaSrS:Bi, ZnCdS:Cu etc., the zinc sulphide class light-accumulating agent of ZnS:Cu etc.In addition; Can also enumerate aluminic acid compounds of representing with MAalbOc etc.; Wherein M is made up of at least a above metallic element that is selected from calcium, strontium and the barium; And this compound contains 10 moles of active agents below the % with respect to the above-mentioned metallic element of representing with M usually, and this active agent is made up of at least a above element that is selected from europium, lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, ruthenium, manganese, tin, the bismuth.From viewpoint water-disintegrable, persistence characteristic, preferred aluminic acid compounds, the further preferred strontium aluminate compounds that adopts europium, dysprosium as metallic element employing strontium, as active agent.In addition, the light absorption wavelength of light-accumulating agent is preferably at 200nm～500nm.Brightness excellence in said scope, thus preferred.
Further, require light-accumulating agent to have the mean grain size of 1～30 mu m range.Preferred mean grain size is the scope of 1～20 μ m, further is preferably the scope of 2～17 μ m.When mean grain size less than 1 μ m, have any problem in the manufacturing, thus impracticable and be difficult to obtain, thus not preferred.On the other hand, when surpassing 30 μ m, the infringement optical characteristics, thereby not preferred.And then, also can and with mean grain size, size distribution and diverse two or more light-accumulating agent, also can use separately or also different, and have the light-accumulating agent etc. of two above size distribution with size distribution.
With respect to the transparent resin (C) of 100 weight portions, the use level of light-accumulating agent is 0.01～9 weight portion.If use level less than 0.01 weight portion then is difficult to obtain the optimization of optical characteristics, thereby not preferred.On the other hand,, then damage optical characteristics if surpass 9 weight portions, thus not preferred.Preferred use level is 0.03～7 weight portion, and more preferably 0.05～6 weight portion in said scope, can access further good optical characteristics.
In practicality,, and as required, can add known various adjuvants, polymkeric substance etc. at the resin combination that is used for light-accumulating agent layer of the present invention (II) according to desired performance.For example,, the ultraviolet light absorber of the fast light stabilizing agent of hindered amines, benzotriazole, benzophenone, triazines and malonic acid class can be added, also these adjuvants can be and used in order to suppress to be exposed to for a long time the variable color of the resin forming product that the light time produces.
As the transparent resin (C) that is used for the light-accumulating agent layer, preferably adopt acrylic resin, polycarbonate resin, melamine resin or silicones among the present invention.
Acrylic resin is polypropylene acids monomer and the resin that obtains; As acrylic monomer, can use or mix use methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, Jia Jibingxisuanyizhi, propyl methacrylate, butyl methacrylate, methacrylic acid 2-ethylhexyl, methacrylic acid phenylester etc. separately.
As polycarbonate resin, can preferably adopt the identical resin of polycarbonate resin that uses in the explanation with above-mentioned polycarbonate resin sheet.
As melamine resin; The preferred use in the presence of acid catalyst, solvent, various adjuvants; The heat curing-type melamine resin that makes the reaction of polyalcohols and etherificate melamine methylol and obtain; Wherein, the etherificate melamine methylol is with melamine and formolite reaction and the alkyl etherificate resultant of reaction of the melamine methylol that generates.
As the etherificate melamine methylol; For example can enumerate with the HMMM is the complete alkyl type methylated melamine of representative; The part of the methoxy of HMMM becomes the material of methylol, the material that a part becomes imino group, the material that a part becomes butoxymethyl; Perhaps be the complete alkyl type butylation melamine etc. of representative with six butoxymethyl melamines, especially preferred hexa methoxy melamine methylol.
As polyalcohols, preferably use di-alcohols and glycols, preferred butylene glycol, hexanediol in the di-alcohols, preferred polyglycol in the glycols.
As silicones, preferably with the resin of heat curing-type organopolysiloxane resins as major component.Specifically, the coating formed by alkoxy silane, cataloid, curing catalysts, solvent and adjuvant as required of preferred coating and make it to solidify and the organopolysiloxane that obtains as the silicones of principal ingredient.
Alkoxy silane is meant for example MTMS, ethyl trimethoxy silane, isobutyl trimethoxy silane, vinyltrimethoxy silane, γ-methacryloxypropyl trimethoxy silane, β-(3; 4-epoxy radicals cyclohexyl) the trifunctional alkoxy silane of ethyl trimethoxy silane, γ-glycidoxypropyltrime,hoxysilane, gamma-amino propyl trimethoxy silicane, N-β (amino-ethyl) gamma-amino propyl trimethoxy silicane etc., and then be meant that part or all of part or all material that is hydrolyzed and this hydrolysate of a kind of or two or more potpourris of four functional alkoxysilanes such as tetraethoxysilane, four positive propoxy silane, tetraisopropoxysilan, four n-butoxy silane, tetraisobutoxy-silicane alkane carried out the condensation product of condensation reaction.
Cataloid is that size is 5～200nm, and the silicon dioxide microparticle that is preferably 5～40nm is dispersed in the material that forms in water or the organic solvent with colloidal.In addition, also can, coating be coated with the silicon face coating that constitutes by the heat curing film that with the organopolysiloxane resins is major component in the above after being the priming paint of major component with the acrylic resin.
The cured layer of aforesaid propylene acid resin is the cured layer that acrylic copolymer has been solidified with crosslinking chemical; As acrylic copolymer, preferably make methacrylic acid 2-hydroxyethyl ester, methacrylic acid 2-hydroxy-propyl ester, the methacrylic acid 3-hydroxy-propyl ester of methyl methacrylate, Jia Jibingxisuanyizhi and 5～50 moles of % more than 50～95 moles of %, the acrylic copolymer of methacrylic acid 4-hydroxybutyl ester copolymerization specifically.
In addition, in the present invention,, become light source side and be provided with resin bed (second layer) face that contains light-accumulating agent as preferred mode.
< laminating method >
In the present invention; As method, can enumerate the method that the thermoplastic resin composition (II) that will be used to form the light-accumulating agent layer through the T mould melt extrudes on thermoplastic resin sheet and carries out lamination at thermoplastic resin sheet (ground floor) laminated light-accumulating agent layer (second layer).Also have in addition in the way of thermoplastic resin sheet manufacturing process, will be formed on light-accumulating agent layer continuous laminating on the film in advance in the lip-deep method of this sheet with warm-up mill etc.In addition, also have thermoplastic resin sheet and light-accumulating agent layer are melt extruded simultaneously and carry out range upon range of coetrusion.In addition, also have rubbing method, light-accumulating agent is stacked in the method on the thermoplastic resin sheet layer by layer through dip coated method, flow coat method, rolling method, notch board rubbing method, reverse rubbing method etc.Perhaps, being transferred to thermoplastic resin sheet through the transfer foil film that will have the light-accumulating agent layer carries out range upon range of method in addition.
As the transfer foil film, the preferred use has the paper tinsel film by the sandwich construction that basement membrane/release layer/protective seam/light-accumulating agent layer/adhesive coating constitutes.The adhesive coating of said transfer foil film is adhered on the thermoplastic resin sheet and paste, and peel off release layer, can access on thermoplastic resin sheet from resin sheet side transfer printing successively the light diffusing sheet of adhesive coating/light-accumulating agent layer/protective seam thus.
When adopting laminating and coetrusion as method at thermoplastic resin sheet laminated light-accumulating agent layer, as the resin that is used to form the light-accumulating agent layer, preferred thermoplastic resin, also preferred acrylic resin or polycarbonate resin in thermoplastic resin.
In addition, when adopting rubbing method,, preferably use thermoplastic resin or thermosetting resin as the material that is used to form coating as method at thermoplastic resin sheet laminated light-accumulating agent layer.Also preferred acrylic resin or polycarbonate resin in thermoplastic resin.Perhaps, as thermosetting resin, preferred melamine resin, silicones, acrylic resin etc.
Further, when adopting the transfer foil film, be easy to the light-accumulating agent layer is formed film,, preferably adopt acrylic copolymer as the material that is used to form coating as method at thermoplastic resin sheet laminated light-accumulating agent layer.
The thickness of light-accumulating agent layer is preferably in the scope of 1～200 μ m, more preferably in the scope of 2～70 μ m.Wherein, when adopting laminating or coetrusion, the thickness of preferred light-accumulating agent layer is in the scope of 10～100 μ m, more preferably in the scope of 20～70 μ m.In addition, when adopting rubbing method or transfer foil film, the thickness of preferred light-accumulating agent layer is in the scope of 1～20 μ m, more preferably in the scope of 1～10 μ m.In addition, the light-accumulating agent layer is thin more, is not easy to produce the warpage issues that the difference because of the difference of the percent thermal shrinkage between thermoplastic resin sheet and the light-accumulating agent layer or water-intake rate causes more, thereby preferred.
In addition,, can more effectively hide the shape of light source (lamp) through contain the coating of light-accumulating agent with the striated coating, thereby preferred the employing.
< adjuvant >
In above-mentioned thermoplastic resin sheet; In the scope of not damaging the object of the invention and effect; Can also cooperate other compositions, for example can be as required, adjuvants such as the fluorescer of cooperation expression, thermal stabilizer, release agent, ultraviolet light absorber, blueing agent, fire retardant, flame retardant.
< fluorescer >
Fluorescer has color and luster with resin to be improved and becomes white or blue white, and improves the effect of the brightness of light diffusing sheet of the present invention.At this, fluorescer has the energy of light-absorbing ultraviolet portion, with the effect of this energy with the viewable portion radiation.
As fluorescer, can enumerate diphenylethylene (ス チ Le ベ Application ゼ Application), benzimidazole, Benzooxazole kind, naphthalimide, rhodamine class, Coumarins 、 oxazine compounds etc.Wherein, preferred benzoxazole compounds and coumarin kind compound.These fluorescers can use a kind of, also can two or more and usefulness.Specifically, can enumerate the カ ヤ ラ イ ト OS (CI Fluorescent Brightener 219:1, benzoxazole compounds) of Japanese chemical drug (strain) manufacturing, Ha Star コ-Le PSR (coumarin kind compound) that Ha Star コ one Le ケ ミ カ Le (strain) is made, the EASTOBRITE OB-1 of EASTOMAN Chemical manufactured etc.
With respect to employed 100 weight portion thermoplastic resins; The use level of fluorescer is preferably 0.0001～3 weight portion; More preferably 0.0002～0.5 weight portion further is preferably 0.0003～0.1 weight portion, especially is preferably 0.0005～0.05 weight portion.Be controlled in the above-mentioned scope through use level, can make the face photism abundant, can access the effect of improving of light-emitting area color and luster thus, and do not have the irregular of color and luster (form and aspect) fluorescer, thus preferred.
< thermal stabilizer >
In order to prevent that when the molding thermoplastic resin molecular weight reduces or form and aspect worsen, can use thermal stabilizer.As said thermal stabilizer, can enumerate phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acids and their ester.
Specifically, can enumerate triphenyl phosphite, tricresyl phosphite (nonyl phenyl) ester, tridecyl phosphite, tricresyl phosphite monooctyl ester, tricresyl phosphite (octadecyl) ester, didecyl list phenyl phosphites, dioctyl list phenyl phosphites, diisopropyl list phenyl phosphites, monobutyl diphenyl phosphite ester, single decyl diphenyl phosphite ester, single octyl group diphenyl phosphite ester, three (2, the 4-di-tert-butyl-phenyl) phosphite ester, two (2; 6-di-t-butyl-4-aminomethyl phenyl) pentaerythritol diphosphites, 2,2-di-2-ethylhexylphosphine oxide (4, the 6-di-tert-butyl-phenyl) octyl group phosphite ester, two (nonyl phenyl) pentaerythritol diphosphites, two (2; The 4-di-tert-butyl-phenyl) pentaerythritol diphosphites, distearyl acyl group pentaerythritol diphosphites, tributyl phosphate, triethyl phosphate, trimethyl phosphate, triphenyl phosphate, the adjacent xenyl phosphate of diphenyl list, dibutylphosphoric acid ester, phosphoric acid octyl group ester, diisopropyl phosphate, four (2, the 4-diisopropyl phenyl)-4,4 '-diphenylene, two phosphinates, four (2; 4-di-n-butyl phenyl)-4,4 '-diphenylene, two phosphinates, four (2, the 4-di-tert-butyl-phenyl)-4; 4 '-diphenylene, two phosphinates, four (2, the 4-di-tert-butyl-phenyl)-4,3 '-diphenylene, two phosphinates, four (2; The 4-di-tert-butyl-phenyl)-3,3 '-diphenylene, two phosphinates, four (2, the 6-diisopropyl phenyl)-4; 4 '-diphenylene, two phosphinates, four (2; 6-di-n-butyl phenyl)-4,4 '-diphenylene, two phosphinates, four (2, the 6-di-tert-butyl-phenyl)-4; 4 '-diphenylene, two phosphinates, four (2; The 6-di-tert-butyl-phenyl)-4,3 '-diphenylene, two phosphinates, four (2, the 6-di-tert-butyl-phenyl)-3; 3 '-diphenylene, two phosphinates, two (2; The 4-di-tert-butyl-phenyl)-diphenylene phosphinate, phenyl-phosphonic acid dimethyl ester, phenyl-phosphonic acid diethylester, phenyl-phosphonic acid dipropyl etc., wherein, preferred three (2; The 4-di-tert-butyl-phenyl) phosphite ester, distearyl acyl group pentaerythritol diphosphites, trimethyl phosphate, four (2; The 4-di-tert-butyl-phenyl)-4,4 '-diphenylene, two phosphinates and two (2, the 4-di-tert-butyl-phenyl)-diphenylene phosphinate.
These thermal stabilizers can use a kind of, also can two or more mixing use.With respect to 100 parts by weight of thermoplastic resin, the use amount of said thermal stabilizer is preferably 0.001～0.5 weight portion.
< release agent >
Release agent is the metallic roll release property when improving extrusion molding and using.As release agent, can use fatty acid ester compound, as said fatty acid ester, the part ester of the monohydroxy alcohol of preferred carbon number 1～20 or the saturated fatty acid of polyvalent alcohol and carbon number 10～30 or full ester.Part ester or full ester as said monohydroxy alcohol or polyvalent alcohol and saturated fatty acid; Can enumerate glyceryl monostearate, stearic acid two glyceride, glycerol stearate, stearic acid list sorb ester 、 behenic acid monoglyceride, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythrite four pelargonates, propylene glycol monostearate, stearic acid 18 alcohol esters, palmitic acid palmityl ester, butyl stearate, methyl laurate, isopropyl palmitate, diphenic acid biphenyl ester (PVC Off エ ニ Le PVC Off エ ネ one ト), sorbitan monostearate, 2-ethylhexyl stearate etc.; Wherein, preferably use glyceryl monostearate, glycerol stearate, pentaerythritol tetrastearate.With respect to 100 parts by weight of thermoplastic resin, the use amount of said fatty acid ester is preferably 0.001～0.5 weight portion.
<ultraviolet light absorber >
The light diffusing sheet that is formed by thermoplastic resin is because of for a long time from light source intermittently or receive the rayed that has all Wavelength distribution, intensity ultraviolet range～visible region continuously, thereby causes variable color easily.In order to prevent this variable color, preferably use ultraviolet light absorber.
As the ultraviolet light absorber that is included in the light diffusing sheet, can enumerate following material particularly.Promptly; As benzophenone; Can enumerate 2; 4-dihydroxy benaophenonel, 2-hydroxyl-4-methoxy benzophenone, 2-hydroxyl-4-octyloxy benzophenone, 2-hydroxyl-4-benzyloxy benzophenone, 2-hydroxyl-4-methoxyl-5-sulphur oxygen base benzophenone, 2-hydroxyl-4-methoxyl-5-sulphur oxygen base Trihydride benzophenone (2-ヒ De ロ キ シ-4-メ ト キ シ-5-ス Le ホ キ シ ト リ Ha イ De ラ イ De レ イ ト ベ Application ゾ Off エ ノ Application), 2,2 '-dihydroxy-4-methoxy benzophenone, 2,2 '; 4; 4 '-tetrahydroxybenzophenone, 2,2 '-dihydroxy-4,4 '-dimethoxy-benzophenone, 2; 2 '-dihydroxy-4,4 '-dimethoxy-5-sulphur oxygen acid sodium benzophenone, two (5-benzoyl-4-hydroxyl-2-methoxyphenyl) methane, 2-hydroxyl-4-positive 12-alkoxy benzophenone, 2-hydroxyl-4-methoxyl-2 '-carboxyl benzophenone etc.As the triazines ultraviolet light absorber, can enumerate 2-(4,6-diphenyl-1,3,5-triazines-2-yl)-5-hexyl oxy phenol.
As benzotriazole, can enumerate 2-(2-hydroxy-5-methyl base phenyl) benzotriazole, 2-(2-hydroxyl-uncle's 5-octyl phenyl) benzotriazole, 2-(2-hydroxyl-3,5-dicumylphenyl) phenyl benzotriazole, 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, 2; [4-(1,1,3 for 2 '-di-2-ethylhexylphosphine oxide; The 3-tetramethyl butyl)-6-(2H-benzotriazole-2-yl) phenol], 2-(2-hydroxyl-3; The 5-di-tert-butyl-phenyl) benzotriazole, 2-(2-hydroxyl-3,5-di-tert-butyl-phenyl)-5-chlorobenzotriazole, 2-(2-hydroxyl-3,5-di-tert-pentyl-phenyl) benzotriazole, 2-(2-hydroxyl-uncle's 5-octyl phenyl) benzotriazole, 2-(2-hydroxyl-5-tert-butyl-phenyl) benzotriazole, 2-(2-hydroxyl-4-octyloxyphenyl) benzotriazole, 2; 2 '-di-2-ethylhexylphosphine oxide (4-cumyl-6-benzotriazole benzene), 2; 2 '-TOPOT 2,2 (1,3-benzoxazine-4-ketone), 2-[2-hydroxyl-3-(3,4; 5,6-tetrahydrochysene phthalic amide methyl)-the 5-aminomethyl phenyl] benzotriazole.
As cyclic imide base ester class, can enumerate 2,2 '-TOPOT 2,2 (3,1-benzoxazine-4-ketone), 2,2 '-(4,4 '-diphenylene) two (3,1-benzoxazine-4-ketone), 2,2 '-(2, the 6-naphthyl) two (3,1-benzoxazine-4-ketone).
In above-mentioned, and preferred UV-531,2-(4,6-diphenyl-1,3; 5-triazine-2-yl)-and 5-hexyl oxy phenol, 2-(2-hydroxyl-uncle's 5-octyl phenyl) benzotriazole, 2-(2-hydroxyl-3,5-dicumylphenyl) phenyl benzotriazole, 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, 2, [4-(1 for 2 '-di-2-ethylhexylphosphine oxide; 1,3,3-tetramethyl butyl)-6-(2H-benzotriazole-2-yl) phenol], 2; 2 '-TOPOT 2,2 (3,1-benzoxazine-4-ketone), more preferably UV-531,2-(4; 6-diphenyl-1,3,5-triazines-2-yl)-5-hexyl oxy phenol, 2-(2-hydroxyl-uncle's 5-octyl phenyl) benzotriazole, 2; [4-(1,1,3 for 2 '-di-2-ethylhexylphosphine oxide; The 3-tetramethyl butyl)-6-(2H-benzotriazole-2-yl) phenol], 2,2 '-TOPOT 2,2 (3,1-benzoxazine-4-ketone) etc.
With respect to 100 parts by weight of thermoplastic resin, the ratio of ultraviolet light absorber is preferably 0.01～2 weight portion, and more preferably 0.01～1 weight portion further is preferably 0.01～0.8 weight portion, especially is preferably 0.02～0.5 weight portion.If the content of ultraviolet light absorber surpasses 2 weight portions, then cause the rotten of light diffusing sheet of the present invention sometimes.
In addition, when light diffusing sheet had the diaphragm that contains ultraviolet light absorber, with respect to 100 parts by weight of thermoplastic resin, the ratio of ultraviolet light absorber was preferably 0～0.5 weight portion, more preferably 0～0.3 weight portion.On the one hand, when light diffusing sheet did not have diaphragm, with respect to 100 parts by weight of thermoplastic resin, the ratio of ultraviolet light absorber was preferably 0.01～2 weight portion, more preferably 0.02～1 weight portion.
< surface configuration of light diffusing sheet >
Can perhaps have the space pattern shape on two surfaces on single surface of light diffusing sheet of the present invention, for example preferably have light diffusing good rib shape (zigzag), ridge shape or corrugated etc.Through the pattern of concaveconvex shape is set on the light diffusing sheet surface, can improve brightness, and make the light diffusing ability excellent.
As obtaining the method that the surface has the thermoplastic resin system light diffusing sheet of space pattern shape; Preferred stamp chill roll and the method for the thermoplastic resin board that the silica gel roller clamping melt extrudes of implementing to have the reverse pattern of required patterns such as rib shape (zigzag), ridge shape or corrugated through the roller surface that adopt; Further; In chill roll thereafter, also preferably use mirror roller and the patterned light diffusing sheet of silica gel roller clamping.According to this method, can not cause manufacturing equipment under the situation of damage, can produce industry and go up stable, patterned light diffusing sheet.
Embodiment
Below, further specify the present invention through embodiment.In addition, evaluation method is for being described below.
Picture appraisal when (1) being installed in LCD
Light diffusing sheet to the long 231mm of 10.4 type Staight downward type backlight unit assembling, wide 321mm, thick 2mm; So that the face that contains the light-accumulating agent resin bed that has of light diffusing sheet becomes the cold-cathode lamp side; LCD detects by an unaided eye; Be expressed as ◎ when the tone of whole of display is observed to when good, the tone that display is whole is not expressed as zero when changing, display image deepening and then being expressed as when having the tonal variation part *.
(2) mean flow rate of light diffusing sheet and mean luminance differences
Light diffusing sheet to the long 173mm of 10.4 type Staight downward type backlight unit assembling, wide 224mm, thick 2mm; So that the face that contains the light-accumulating agent resin bed that has of light diffusing sheet becomes the cold-cathode lamp side; And lit a lamp continuously 5000 hours; Then, as mean flow rate, measure the nine places brightness (cd/m of light diffusing sheet with the nitometer BM-7 of TOPCON (strain) manufacturing
2) after, with expression recently to comparative example 3.Evaluating apparatus is shown in Fig. 1 and Fig. 2.In addition, mean luminance differences is with the difference of high-high brightness and minimum brightness the ratio (minimum brightness/high-high brightness) of high-high brightness to be represented.
(3) total light transmittance (Tt)
Use length and width to be the light diffusing sheet of 50mm, thickness 2mm, according to JIS K-6735, and the integrating sphere type total light transmittance analyzer NDH-2000 (illuminant-C) that utilizes Japanese electric look industry (strain) to make measures.
(4) mist degree (turbidity) (H)
Use length and width to be the light diffusing sheet of 50mm, thickness 2mm, according to JIS K-6735, and the integrating sphere type total light transmittance analyzer NDH-2000 (illuminant-C) that utilizes Japanese electric look industry (strain) to make measures.Mist degree is then gone out by computes.
H＝Td/Tt×100(％)
(wherein, Td=scattered beam transmitance)
In the viscosity-average molecular weight that is obtained by bisphenol-A and phosgene is 24300 polycarbonate resin 100 weight portions; Add 0.3 weight portion cross-linked silicone [the ト ス パ that makes of Toshiba's organosilicon (strain) one Le 120, weight average particle diameter 2 μ m], 0.2 weight portion benzotriazole ultraviolet light absorber [CHEMIPRO changes into the ChemiSorb79 that (strain) makes] and mix; Utilize the T mould extruder of band exhaust portion; Keep melt extruding the polycarbonate resin plate of thickness 2mm, width 1000mm under the condition of 26.6kPa in 250～300 ℃ of extruder temperatures, 260～300 ℃ of mold temperatures, exhaust portion vacuum tightness.
Utilization has the nozzle in the about 3mm of diameter hole; Width along polycarbonate resin plate; And with the interval of about 3cm, supply with the ratio of cooperation shown in the table 1 be combined with the light-accumulating agent strontium aluminate [special at all chemistry (strain) is made, commodity be called GLL-300FFS (mean grain size 3.4 μ m, light absorption wavelength are 200～450nm), BGL-300FFS (mean grain size 3.0 μ m, light absorption wavelength are 200～450nm)] with as acrylic resin (Xin Zhong village (strain) manufacturing of bonding agent; Trade name バ Na レ ジ Application) coating (solvent: the 2-butanols); And after 0.3～1 second, the roller that adopts about 80mm of diameter and perimeter material to be made up of rubber is opened in two surfaces coated of sheet.
Fig. 3 representes to contain the synoptic diagram (diagrammatic cross-section) of the acrylic coating coating process of said light-accumulating agent.Among the figure, the sheet that 20 expressions are extruded continuously, 21 expressions are used to supply with the nozzle of the acrylic coating that contains light-accumulating agent, the jet hole that 22 expression about 3mm of diameter and coating infeed, the roller that 23 expression about 80mm of diameter and perimeter material are made up of rubber.To the sheet of extruding continuously, be that 100cc/ minute amount is supplied with the coating that contains light-accumulating agent with every 1mm of Width.In addition, after the remaining coating that contains light-accumulating agent then reclaims in device behind the roller coat cloth, be used for supplying with once more.
Then, through 70～90 ℃ hot blasts about 10～20 seconds drying is carried out on the surface that is coated with the sheet that contains light-accumulating agent coating after, carry out various evaluations.To measure the result and be shown in table 1.
Table 1
Embodiment 9～12, comparative example 4,5
With embodiment 1 likewise with after the polycarbonate resin plate extrusion molding; With striated coating according to cooperating ratio to be combined with light-accumulating agent strontium aluminate (special at all chemistry (strain) is made, trade name GLL-300FFS) shown in the table 2 and as the coating of the acrylic resin of bonding agent.
Then, to after being coated with the sheet surface that contains light-accumulating agent coating and carrying out about 10～20 seconds drying, carry out various evaluations through 90 ℃ hot blasts.To measure the result and be shown in table 2.
Table 2
Industrial applicibility
Because light diffusing sheet of the present invention has the excellent hidden ability of light source; Therefore can be used for covering in the parts of light source, promptly can be used for diffuser plate, the ligthing paraphernalia of Staight downward type backlight unit and the end face irradiation type unit of LCD TV lamp box, various device Switch and need in all purposes of light diffusing.
Claims (8)
1. light diffusing sheet; It is characterized in that; Be to constitute and thickness is the light diffusing sheet of 0.1～5.0mm by the ground floor and the second layer; Said ground floor is that the resin combination (I) of the light diffusing agent (B) of 0.1～50 μ m forms by contain 0.05～10 weight portion mean grain size with respect to the transparent thermoplastic resin (A) of 100 weight portions, and it is that the resin combination (II) of the light-accumulating agent (D) of 1～30 μ m forms that the said second layer contains 0.01～9 weight portion mean grain size by the transparent resin (C) with respect to 100 weight portions.
2. light diffusing sheet as claimed in claim 1; Wherein, transparent thermoplastic resin (A) be selected from by polycarbonate resin, vibrin, aromatic vinyl class monomer and have low alkyl group (methyl) alkyl acrylate multipolymer, (methyl) acryl resin and have a kind of resin or the two or more resin compounds in the group that the resin of ester ring type structure forms.
3. light diffusing sheet as claimed in claim 1, wherein, light diffusing agent (B) is the silicon compounds.
4. light diffusing sheet as claimed in claim 1, wherein, second layer thickness is 1～200 μ m.
5. light diffusing sheet as claimed in claim 1, wherein, transparent resin (C) is a kind of resin or the two or more resin compound that is selected from the group of being made up of acrylic resin, polycarbonate resin, melamine resin and silicones.
6. light diffusing sheet as claimed in claim 1, wherein, the content of light-accumulating agent (D) is 0.03～7 weight portion.
7. light diffusing sheet as claimed in claim 1, wherein, the light absorption wavelength of light-accumulating agent (D) is 200nm～500nm.
8. light diffusing sheet as claimed in claim 1, wherein, light-accumulating agent (D) is the strontium aluminate compounds.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008075991 | 2008-03-24 | ||
| JP2008-075991 | 2008-03-24 | ||
| JP2008075991A JP2009229879A (en) | 2008-03-24 | 2008-03-24 | Light diffusion plate |
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| Publication Number | Publication Date |
|---|---|
| CN101545987A CN101545987A (en) | 2009-09-30 |
| CN101545987B true CN101545987B (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101302065A Expired - Fee Related CN101545987B (en) | 2008-03-24 | 2009-03-24 | Light diffuser |
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| JP (1) | JP2009229879A (en) |
| CN (1) | CN101545987B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011062024A1 (en) * | 2009-11-20 | 2011-05-26 | シャープ株式会社 | Optical member, lighting device, display apparatus, television receiver, and manufacturing method of optical member |
| JP2012126114A (en) * | 2010-12-17 | 2012-07-05 | Sumika Styron Polycarbonate Ltd | Laminate |
| CN104748007A (en) * | 2015-02-14 | 2015-07-01 | 溧阳市超强链条制造有限公司 | LED light box and production method |
| CN104559003A (en) * | 2015-02-15 | 2015-04-29 | 李�杰 | High-toughness high-transparency photo-diffusion PMMA material and preparation method thereof |
| CN108749046A (en) * | 2018-04-24 | 2018-11-06 | 惠州市笨鸟光学材料有限公司 | A kind of processing method of board |
| CN111531998A (en) * | 2020-04-30 | 2020-08-14 | 王洛 | Optical polyester film |
| CN112829414A (en) * | 2020-12-31 | 2021-05-25 | 浙江碳景科技有限公司 | Composite light diffusion plate and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020077385A (en) * | 2000-12-12 | 2002-10-11 | 도레이 가부시끼가이샤 | Light diffusing film and method for preparation thereof |
| CN1395693A (en) * | 2000-11-13 | 2003-02-05 | 旭化成株式会社 | Light guide and method for producing transparent thermoplastic resin composition for light guide |
| CN1153071C (en) * | 1999-01-22 | 2004-06-09 | 埃勒夫阿托化学有限公司 | Light diffusion composite material |
| CN1591116A (en) * | 2003-08-27 | 2005-03-09 | 第一毛织株式会社 | Light scattering plate and liguid crystal display using the same |
-
2008
- 2008-03-24 JP JP2008075991A patent/JP2009229879A/en active Pending
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- 2009-03-24 CN CN2009101302065A patent/CN101545987B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153071C (en) * | 1999-01-22 | 2004-06-09 | 埃勒夫阿托化学有限公司 | Light diffusion composite material |
| CN1395693A (en) * | 2000-11-13 | 2003-02-05 | 旭化成株式会社 | Light guide and method for producing transparent thermoplastic resin composition for light guide |
| KR20020077385A (en) * | 2000-12-12 | 2002-10-11 | 도레이 가부시끼가이샤 | Light diffusing film and method for preparation thereof |
| CN1189764C (en) * | 2000-12-12 | 2005-02-16 | 东丽株式会社 | Light diffusing film and method for prepn. thereof |
| CN1591116A (en) * | 2003-08-27 | 2005-03-09 | 第一毛织株式会社 | Light scattering plate and liguid crystal display using the same |
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| Publication number | Publication date |
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| CN101545987A (en) | 2009-09-30 |
| JP2009229879A (en) | 2009-10-08 |
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