TWI275477B - Optical methacrylic resin extrusion plate manufacturing method - Google Patents
Optical methacrylic resin extrusion plate manufacturing method Download PDFInfo
- Publication number
- TWI275477B TWI275477B TW094137698A TW94137698A TWI275477B TW I275477 B TWI275477 B TW I275477B TW 094137698 A TW094137698 A TW 094137698A TW 94137698 A TW94137698 A TW 94137698A TW I275477 B TWI275477 B TW I275477B
- Authority
- TW
- Taiwan
- Prior art keywords
- methacrylic resin
- polymer
- plate
- polymerization
- thickness
- Prior art date
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- 239000000113 methacrylic resin Substances 0.000 title claims abstract description 49
- 238000001125 extrusion Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000003287 optical effect Effects 0.000 title 1
- 229920000642 polymer Polymers 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 28
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 5
- 238000005286 illumination Methods 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000005259 measurement Methods 0.000 description 14
- 239000000178 monomer Substances 0.000 description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- -1 methyl propyl Chemical group 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 238000010557 suspension polymerization reaction Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003505 polymerization initiator Substances 0.000 description 5
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000058 polyacrylate Polymers 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000012662 bulk polymerization Methods 0.000 description 3
- WQAQPCDUOCURKW-UHFFFAOYSA-N butanethiol Chemical compound CCCCS WQAQPCDUOCURKW-UHFFFAOYSA-N 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 150000003573 thiols Chemical class 0.000 description 3
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 description 2
- BDFAOUQQXJIZDG-UHFFFAOYSA-N 2-methylpropane-1-thiol Chemical compound CC(C)CS BDFAOUQQXJIZDG-UHFFFAOYSA-N 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 244000147568 Laurus nobilis Species 0.000 description 2
- 235000017858 Laurus nobilis Nutrition 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000005212 Terminalia tomentosa Nutrition 0.000 description 2
- 239000012986 chain transfer agent Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N methyl pentane Natural products CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- KZCOBXFFBQJQHH-UHFFFAOYSA-N octane-1-thiol Chemical compound CCCCCCCCS KZCOBXFFBQJQHH-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000007870 radical polymerization initiator Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000021419 vinegar Nutrition 0.000 description 2
- 239000000052 vinegar Substances 0.000 description 2
- HGXJDMCMYLEZMJ-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOOC(=O)C(C)(C)C HGXJDMCMYLEZMJ-UHFFFAOYSA-N 0.000 description 1
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 1
- UJNVTDGCOKFBKM-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)hexane Chemical compound CCCCCC(OOC(C)(C)C)OOC(C)(C)C UJNVTDGCOKFBKM-UHFFFAOYSA-N 0.000 description 1
- ZOASGOXWEHUTKZ-UHFFFAOYSA-N 1-(Methylthio)-propane Chemical compound CCCSC ZOASGOXWEHUTKZ-UHFFFAOYSA-N 0.000 description 1
- JOFQXPUKJJQCPW-UHFFFAOYSA-N 1-methyl-1-propylhydrazine Chemical compound CCCN(C)N JOFQXPUKJJQCPW-UHFFFAOYSA-N 0.000 description 1
- ZFEZIAPMHMZNRS-UHFFFAOYSA-N 2-$l^{1}-sulfanyl-2-methylpropane Chemical compound CC(C)(C)[S] ZFEZIAPMHMZNRS-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- LXUNZSDDXMPKLP-UHFFFAOYSA-N 2-Methylbenzenethiol Chemical compound CC1=CC=CC=C1S LXUNZSDDXMPKLP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 1
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- FSWCCQWDVGZMRD-UHFFFAOYSA-N 4-methylcyclohexene Chemical compound CC1CCC=CC1 FSWCCQWDVGZMRD-UHFFFAOYSA-N 0.000 description 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 102100035353 Cyclin-dependent kinase 2-associated protein 1 Human genes 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- WRQNANDWMGAFTP-UHFFFAOYSA-N Methylacetoacetic acid Chemical compound COC(=O)CC(C)=O WRQNANDWMGAFTP-UHFFFAOYSA-N 0.000 description 1
- 101100004163 Mus musculus Bag3 gene Proteins 0.000 description 1
- 241000283973 Oryctolagus cuniculus Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 206010036790 Productive cough Diseases 0.000 description 1
- 241000239226 Scorpiones Species 0.000 description 1
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 1
- 244000126002 Ziziphus vulgaris Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000001334 alicyclic compounds Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229940072049 amyl acetate Drugs 0.000 description 1
- PGMYKACGEOXYJE-UHFFFAOYSA-N anhydrous amyl acetate Natural products CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical group CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 1
- GCFAUZGWPDYAJN-UHFFFAOYSA-N cyclohexyl 3-phenylprop-2-enoate Chemical compound C=1C=CC=CC=1C=CC(=O)OC1CCCCC1 GCFAUZGWPDYAJN-UHFFFAOYSA-N 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- MNWFXJYAOYHMED-UHFFFAOYSA-M heptanoate Chemical compound CCCCCCC([O-])=O MNWFXJYAOYHMED-UHFFFAOYSA-M 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000010299 mechanically pulverizing process Methods 0.000 description 1
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 229960005489 paracetamol Drugs 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- KFSLWBXXFJQRDL-UHFFFAOYSA-N peroxyacetic acid Substances CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001896 polybutyrate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 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
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 210000003802 sputum Anatomy 0.000 description 1
- 208000024794 sputum Diseases 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Planar Illumination Modules (AREA)
Description
1275477 九、發明說明: 【發明所屬之技術領域】 本發明係關於導光板用甲基丙烯酸樹脂押出板,其適 於·用於個人電腦或文書處理器等辦公室自動化機器、顯 示圖像信號之各種監視器、例如用於面板監視器、電視監 視器等之顯示裝置及用於室内外空間之照明裝置之顯示裝 置、或看板等。 【先前技術】
透明熱可塑性樹脂,其中特別是甲基丙烯酸樹脂,因其 優異的透光性、機械特性多用於照明用途,惟特別是近年 被使用作為具備㈣㈣之顯^裝置等之背光用導光板。 =背光的方式,有將導光板夾於光源與液晶單元之間之所 明正下式’及於導光板的端面安裝光源之端面照光方式之 :種!被使用’現在端面照光方式成為主流。今年顯示裝 置之面亮度化、大型化、薄型化的需求強,以更明亮、更 商品概念持續開發。特別是以端面照光方式之 南党度面發光裝置的開發受到強烈的期望。 因此’對於用在光源裳置之導 之光源燈入光之光之入射光:::板,要求由配置於側面 之非常強。 有效地出射於出射面之導光板 但是’於通常的押出板,抑 但框方向的板厚變化大,而1之板厚變動雖然少, 入光之不規則::1 於光源裝置之光源燈所 先之不規則地射出亮度均句性差,無法得到 關於藉由導光板之高亮度化之方法 同儿又 至$已揭示有複數 105995.doc 1275477 如,藉由在導光板中分散混入光擴散粒子得到均 2發發法(例如,參照專利文獻”,藉由使用:二 望-包“目異微粒子之光散射性塑膠材料 等(例如,參照專利文獻2),惟工序繁雜。X化之方法 專利文獻1 :特公昭39-1194號公報 專利文獻2 :特開平4-145485號公報
技=外使用含有該等繁雜的微粒子之甲基丙烤酸樹脂之 〇 現狀未到達可充分對應亮度及亮度斑等,伴隨 顯示裝置之大型化、薄型化之要求之水準。 【發明内容】 本發明之目的係提供一種導光板用甲基丙焊酸樹脂押出 板及其H造方法,其係適於··❹在顯示圖像信號之各種 監視器、例如面板監視器、電視電視ϋ等之顯示裝置及使 用於室内外空間之照明裝置或看板者。 本發明者們’為解決上述課題銳意研究結果,發現於且 有定形狀之甲基丙烯酸樹脂押出原料以特定比例混合具; 無定形狀之甲基丙烯酸樹脂押出原料,將押出成型之甲基 丙烯酸樹脂板作為導光板使用,可高亮度化,減低亮^ 斑,而達至完成本發明。 即本發明係 Π] 一種導光板用甲基丙烯酸樹脂押出板之製造方法,其 特徵在於··將視密度0.63 g/ml〜0.78 g/mi之定形狀甲基丙 婦酸樹脂聚合體與視密度0.55 g/ml〜〇·63 g/ml之無定形狀 甲基丙烯酸樹脂聚合體混合成視密度〇·8〇 g/ml以上,將所 105995.doc 1275477 得混合物押出成形,板厚為2.0〜15.0 mm,寬方向之板厚 精度為平均板厚之±1〇%以内。 [2] 如請求項1之導光板用甲基丙烯酸樹脂押出板之製造 ' 方法,其中該板厚為3.5〜8.5 mm,且寬方向之板厚精度為 . 平均板厚之±0.5%以内。 [3] 一種導光板用甲基丙烯酸樹脂押出板,其係以上述j 或2之方法製造。 _ 以下具體說明本發明。 所明用於本發明之曱基丙烯酸樹脂,係可由甲基丙基酸 甲酯或甲基丙烯酸乙酯7〇重量%以上,與該等具有共聚合 性之單體共聚合而得。作為與該等具有共聚合性之單體, 可舉出··甲基丙烯酸丁酯、甲基丙烯酸乙酯、甲基丙基酸 甲酯、甲基丙烯酸丙酯、甲基丙烯酸環己酯、甲基丙烯酸 苯酯、甲基丙烯酸2-乙基己基等甲基丙烯酸酯類,甲基丙 基馱甲酉曰、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯 參 豸環己酯等甲基丙烯酸酯類、甲基丙烯酸、丙烯酸等不飽 和酸類等,惟並非限定於此者。 所謂用於本發明之定形狀甲基丙烯酸樹脂押出原料,係 指藉由聚合反應得到球狀或者圓柱狀或扁平狀之甲基丙稀 酸樹脂。所謂無定形狀甲基丙稀酸樹脂押出原料,係將一 旦成型為板狀之甲基丙稀酸樹脂成型體乙甲基丙婦酸做機 械性粉碎處理而得之甲基丙烯酸樹脂。 、球狀甲基丙稀酸,可由懸浮聚合法而得。說明懸浮聚合 法。首先’於包含甲基丙烯酸甲酿或者甲基丙烯酸乙酯與 105995.doc 1275477 :早體之單體混合物,均句地溶解聚合起始劑及鏈轉移 =。將該均句溶解物懸濁於存在有聚合安定劑之水媒體之 二^特^聚合溫度保持-㈣时之完成聚合,將所得 此在聚合物過濾、水洗、乾燥而得。 為使用於懸浮聚合時之聚合起始劑,以乙人 用之習知之自由基聚合起始劑即可。例如,偶氮雙 :2’2 -偶鼠雙(2,4-二甲基正戊腈)、2,2,_偶氮雙異丁酸 :甲醋、過氧化特戊酸叔丁自旨、過氧化2_乙基己酸叔丁 酉曰、過氧化2-乙基己酸異丙苯酿、過氧化苯甲醯、過氧化 月。桂醯等。該等自由基聚合起始劑之使用4,係對單體或 早體混合物1G〇重量部通常以o.m重量部之範圍為佳。 :為使用於懸洋聚合時之鏈轉移劑,以用於甲基丙烯酸 I用之習知者即可。可舉例如^丁硫醇、η-丁硫醇、 辛硫醇、η.12烧基硫醇等。該等鏈轉移劑之使用量,對 於單體或單體混合物100重量部通常以〇 〇1〜2 〇重量部 佳。 …、 /乍為使用於懸浮聚合時之分散安定劑,雖並無特別限 疋’可舉磷酸釣、碳酸約、氫氧化銘等水難溶性無機化合 物、聚乙烯醇' 聚乙烯氧化物、纖維素衍生物之非離子類 向分子化合物、聚丙烯酸及其鹽、聚f基丙烯酸及宜趟' :基丙恤與甲基丙烯酸及其鹽之共聚物等之陰離;類 向分子化合物。該等分散安定劑之使用量,對水ι〇〇重量 部以0.01〜5.0重量部之範圍為佳。 里 作為使用於懸浮聚合時之水,可舉純水、離子交換水、 105995.doc 1275477 脫離子水等。水的使用量,雖並無特別限制,對單體或單 體混合物100重量部以1〇〇〜25〇重量部之範圍為佳。 又,作為懸浮聚合之聚合溫度,雖並無特別限制,以 60〜120 C,以適於聚合起始劑之温度。聚合裝置,使用習 知之具備攪拌槳,例如渦輪槳、法德爾(pfaudler)槳、螺旋 槳、Burmagin槳等具有槳之攪拌機之聚合容器,於諒容器 一般裝有播板。
再者亦可按照需要懸浮脫模劑、著色劑、紫外線吸收 剤、氧化防止劑、光擴散劑、可塑劑等而聚合。 懸浮聚合終了後,以f知方法清洗、脫水、乾燥得到球 狀甲基丙烯酸樹脂聚合體。 本發明之重要構成要件之球狀甲基丙烯酸樹脂聚合體之 平均粒子徑為0.2〜0.5 mm,以〇·25〜〇 39随為佳。於〇·2 mm以上可得良好的板厚精度,又可安定地製造平均粒子 半徑於〇·5 mm以下之聚合體 又’視密度於0.70 g/ml〜0.78 g/ml範圍内則可得良好的板厚精度。 其次說明本發明之重要構成要件之圓柱狀或爲平狀甲基 丙稀酉文树^聚合體。圓柱狀甲基丙嫦酸樹脂聚合體係將以 上述'厶子聚合所付之球狀甲基丙烯酸樹脂供給抽氣式押出 機,以溫度勝26CTC’抽氣真空麼力13〜8咖以押出模 具押出成滑>5狀’水冷,膠條士刀割機⑶价相斷而 得。其他有將以習知之溶液聚合法、塊狀聚合法而得之溶 融狀態之甲基丙烯酸樹脂聚合體以押出模具押出成滑片 狀,水冷,線膠條割機切斷而得。片平狀甲基丙稀酸樹脂 105995.doc 1275477 聚口體係與上述圓柱狀甲基丙烯酸樹脂聚合體之製造同樣 乂抽氣式押出機押出,接著以水中切割機裁切而得。 作為/合液聚合法、塊狀聚合法之例有可舉以下之方法。 。合液聚口法之洛劑’以於蒸留塔底及蒸留塔内部具有比 甲基丙稀酸甲酯單辦Β ^ 早體及甲基丙烯酸甲酯單體及可與甲基丙 婦酉夂甲S曰共聚合之單體為高的沸點者為佳。具體而言,可 甲苯一甲苯、乙苯、二乙苯等芳香族化合物;辛烷、 m日肪合物;十氫化萘等脂環族化合物,·乙酸丁 酉旨、乙酸戊酯等酯類·】】? 0 卜 ^ 、,匕1,2,2-四氯乙烷等鹵素化合物。 特別是烷基苯,進一步苴中 少八中以甲本、二甲苯、乙苯具有適 度的沸點,對脫氣負荷少, .. 7 ^ 又不對聚合產生不良影響而 佳。溶劑量雖依沸點而 曰 j 根據聚合時之全混合物之重 T以30%重量以下,以2〇 $ /以下為佳。於聚合時不使 用〉谷劑,即成塊狀聚合。 使用於;;谷液聚合法、 ^ ^ ^ ^ ^ v ▲狀I 5法之聚合起始劑,係於聚 丁美、、岛^ - 自由基者,例如,過氧化二-第三 一異丙苯、過氧化甲基乙基酮、'第=丁 基過鄰苯二甲酸酯、二 一弟一丁 過乙酸I旨、2,5_:fA25二丁基過苯甲酸酉旨、第三丁基 -(m _ ^ 土 ,二(第三丁基過氧化)己烷、1 ! 一(弟二丁基過氧化)_3 3 5 _ )已沉1,1 5 —甲基環己烧、1,—Γ 基過虱化)環己烷、二 一(弟二丁 ^ S ~戊基過氧化物、過氧彳卜-贫田 、異丙苯基過氧化氫 1化一本甲 乙酯、1,1,·偶氮一 r 匕月桂醯、偶氮二異丁醇二 氧基戊腈、2_氰 ·本基偶H4·二甲基_4.甲 减#丙基偶氮甲酸、2,2、偶氮異丁猜 105995.doc 1275477 等°玄等聚合起始劑之使用量,對全反應物之重量以 °顧韻重量%為佳。 重里以 ^ 此時所使用之分子量調節劑,主要使用硫醇類。 %類可舉,例如,正丁基硫醇、異丁基硫醇、正辛基硫 二烷基硫醇、第二_十二烷基硫醇、第三丁基硫 ::本基硫醇、甲苯硫酚、硫代乙二醇酸及其醋以及乙二 西于等。°亥等分子量調節劑之使用量,對全反應物之重量以 〇·〇1〜0.5重量%為佳。 聚合反應機使用以螺旋帶狀(helicalribbon)、多葉渦輪 型(Pitched paddle)等擾掉禁均勾授掉之裝置。$合係將^ 體或單體溶液連續供給聚合反應機,使單體聚合轉化率於 如7〇/。的乾圍内實質成一定的方式以120〜16(TC的溫度實 «•聚口反應。聚合轉化率為4〇%以上,以揮發成份的脫揮 工序負荷變小’例如由預備加熱器之導熱面積之制約的觀 點不會有脫揮不充分而佳。另一方面,於7〇%以下則,例 如,由聚合反應機於預備加熱器間之配管a力損失變少, 聚^液之輸送容易而佳。聚合溫度於l2〇t以上,聚合速 度實用’而於16(^以下,則聚合速度適當,容易調整聚 合轉化率。又,亦不會有降低耐熱分解性而佳。 將猎由如此之聚合反摩所溫夕3 汉應所侍之聚合液,脫揮取出聚合 物。作為脫揮裝置,使用具有多段抽氣㈣機,脫揮槽 4。最好是將聚合液以預備加熱器等將溫度加熱為 2〇〇 290 C,進料至上部具有充分的空間,且鹰〜25代、 2.7〜UkPa之溫度、真空下的脫揮槽取出聚合物。 105995.doc 11 1275477 該聚合物以溶融狀態連續地移送至押线,通過押 以模具押出成膠條,水冷,以膠條切割機切斷,得到圓柱 狀聚合體。爲平狀甲基丙稀酸樹脂聚合體係與上述圓柱狀 樹脂聚合體製造同樣地以押出機押出,接著以水中切 裁切而得。 再者,按照需要,亦可於裁切前,以押出機之側部使用 進料幫浦,添加脫模劑、著色劑、紫外線吸收劑、氧化防 止劑、光擴散劑、可塑劑等。 本發明之重要構成要件之圓住狀聚合物之形狀,以气面 長酬、短徑⑽及長度(L)規定。長徑(ai)、短經 為 2._〜4._ mm,而(M)/(al)=〇 …鹰,長 2._〜5·_ mm。藉由使之為該範圍内可得良好的又板厚於 度而佳。 月 本發明之重要構成要件之扁平狀聚合物之形狀,以 長徑㈣、短徑⑽及厚度⑺規定。長徑⑹、短徑⑽ 為2.000〜4._麵,而(b2)/(a2)=〇…⑽厚 1·000 3ε_ mm。猎由使之為該範圍内可得良好的板厚於 度而佳。 々月 又,圓柱狀或扁平狀甲基丙烯酸樹月旨聚合體之視密 0.63 g/ml〜0.70 g/ml之範圍則可得良好的板厚精度。“ 俨本之重要構成要件之無定形狀甲基丙烯酸樹脂聚合 體,係將以上述懸浮聚合、溶液聚合、塊狀聚合所 基丙稀酸樹脂聚合體以溶融押出法等,成型為板 以機械粉碎㈣。作為粉碎機可利用衝擊式粉碎機枓 ]05995.doc 1275477 衝擊破碎機、鎚碎機或裁斷式粉碎機,例如切割碎機。特 別是切割碎機可藉由篩網的孔的大小將粉碎品之整粒而 . 佳^網半徑通常使用μ叫前後者,將通過該筛網 之無定形狀甲基丙烯酸樹脂聚合體供於本發明。 该無定形狀甲基丙烯酸樹脂聚合體之視密度為Ο.” g/ml〜0·63 g/ml之範圍内則可得良好的板厚密度。 ,於本發明,將該定形狀甲基丙烯酸樹脂聚合體與無定形 • 狀甲基丙烯酸樹脂聚合體作為甲基丙烯酸樹脂押出用原 ’斗。該定形狀甲基丙烯酸樹脂聚合體與無定形狀甲基丙烯 酉夂树月日聚合體之混合比例使混合物之視密度成〇·8〇 $㈤以 上的方式混合為重要。當混合物之視密度為〇 8〇 g/mi以上 則可知押出安定性佳,板厚精度良好的押出板。 各聚合體之良好的混合比例雖依據合體之大小而不同, 本案實施例之聚合體粒子徑之情形,對定形狀甲基丙烯酸 樹脂聚合體100重量部,無定形狀甲基丙烯酸樹脂聚合體 • 為5〜380重量部,以10〜330重量部,10〜23〇重量部更佳。 又,定形狀甲基丙烯酸樹脂聚合體中之球狀、圓柱狀及/ 或扁平狀甲基丙烯酸樹脂聚合體之比例,對於球狀甲基丙 烯酸樹脂聚合體100重量部圓柱狀及/或扁平狀甲基丙烯酸 樹脂聚合體為0〜400重量部,以0〜25〇重量部為佳、以 0〜150重量部更佳。 本舍明之押出板通常可藉由溶融押出法製作。例如,將 本舍明之疋形狀甲基丙稀酸樹脂聚合體與無定形狀甲基丙 稀酸樹脂聚合體之混合物以220〜30(rc溶融後,通過τ型模 105995.doc -13- 1275477 具押出成板狀,以拋光輥修飾表面冷卻後,藉由切斷可得 板狀體。 板尽精度’係於寬1 〇〇〇 mm之板以5〇 mm間隔測定之板 厚之平均值與測定點之最大值及最小值之差。板厚為 2·〇〜15·〇 mm時板厚精度為平均板厚之土1〇%以内,以〇.5% 以内為佳。 此外板厚為3.5〜8.5 mm時板厚精度為平均板厚之士〇 5% 以内。 本I明之甲基丙烯酸樹脂聚合體押出板,可將由光源燈 入光之光之發光效率極限提升,並且具有減低亮度斑的效 果。 【實施方式】 基於實施例說明本發明。 (球狀甲基丙烯酸樹脂聚合體平均粒徑之測定方法) 使用電磁振盈式篩分測定器(三田村理研工業株式會社 製’電磁振動式AS2〇0 DISIT)。將試料1〇〇 g放入公稱尺寸 500-425·355-300-25(Μ50-150以下之7階段之篩的最上段 4 ’以搖篩機振盪1 〇分鐘,量各篩上的球狀曱基丙烯酸樹 脂聚合體’晝累積殘留分布曲線,求中間徑,作為平均粒 徑。對平均粒徑小的聚合體使用公稱尺寸3〇〇-25〇_18〇_ 125-100-63-63以下之7階段之篩測定。 (圓柱狀曱基丙烯酸樹脂聚合體之長徑、短徑、長度之測 定方法) 使用外侧測微儀(株式會社三豐製MDC-25M),測定200 105995.doc -14- Ϊ275477 粒之長徑、短徑、長度至〇·〇〇 1 mm,求其平均值。 (扁平狀曱基丙烯酸樹脂聚合體之長徑、短徑、長度之 測定方法) 使用外側測微儀(株式會社三豐製MDC_25M),測定2〇〇 粒之長径、短徑、長度至0 ·00 1 mm,求其平均值。 (視密度) 遵照JIS K 7365測定 (甲基丙烯酸樹脂押出板之厚度測定) 於圖1所示寬1000 mm之板以5〇 mm間隔使用外側測微儀 (株式會社三豐製MDC_25M)測定19點至〇·〇01 mm。求各測 疋點之平均值,由該平均值及各測定點之最大值、最小值 算出板厚精度。最大厚度之板厚精度為「板厚精度4」, 最小厚度之板厚精度為「板厚精度_B」。 板厚精度-A(%)=(最大值_平均值}/平均值χ丨⑽…(1) 板厚精度(最大值_平均值)/平均值χ丨⑽…(2) (導光板之亮度、亮度斑之測定方法) 依照圖2所示光源裝置,作為光源將3 ππηφ之冷陰極管 (口利盛電氣製)之導光板設置於長度31 9側之兩端面, 作為光反射片使用反白75(Refwhite75)(KIMOTO製),於導 “板勺上載置2片光擴散片d 12 1 (Tsujiden製)。於冷陰極 吕藉由直机電壓穩定裝置施加12V的電壓點燈20分鐘後藉 由叹置於離發光面1❿之位置之亮度計(CA-1000:美能達 製)將兔光面全體分割為縱19χ橫19 = 361之測定點測定各 個冗度。接著由所得36丨點之測定值算出平均亮度。又, 105995.doc -15- 1275477 由所得36 1點之測定值以下式(3)作為亮度斑之評價指標算 出均勻度。 亮度均勻度(%) =最小亮度值/最大亮度值xl〇〇...(3) (球狀甲基丙烯酸樹脂聚合體(聚合體_A)之製造)
於t合機投入甲基丙稀酸甲醋95.0重量部、丙稀酸甲酉旨 5·〇重量部、過氧化月桂醯0.15重量部、正辛基硫醇〇.25重 里部、脫離子水130重量部、氫氧化鋁0·65重量部2〇〇公 升,攪拌混合。以反應溫度8(TC懸浮聚合15〇分,接著以 ΪΟΟΙ熟成60分鐘實質地結束聚合反應。其次將聚合反應 液冷部至50 c,投入稀硫酸,清洗脫水乾燥處裡,得到熔 融流速(IS〇-1139-Condl3)1.0g/1〇分之球狀甲基丙烯酸樹 脂聚合體(聚合體-A)。聚合體_A之平均粒徑為〇39 mm, 視禮、度為〇·76 g/ml。 (圓柱狀甲基丙烯酸樹脂聚合體(聚合體_B)之製造) 。於包含甲基丙婦酸甲酿79.9重量%、丙烯酸甲醋51重量 %二乙基苯15重量%之單體混合物添加,丨,丨-二(第三丁基 〇 ) 3,3,5 一甲基%己烷15〇 ppm及正辛基硫醇300 ppm ’於完全混合型聚合反應機、以聚合溫度⑸。。,滯留 小時’連續聚合至轉化率53%。將聚合液連續由聚 合反應機取出,接荖4 1 接考以加熱板加熱至26(TC,通過加熱板 之間隔^延墜落。將脫揮 枣人舰认 维符於2·7 kPa、230°c,分離 I 5體與為反應單體及 ^ ^ Φ ^ / J。聚s體以熔融狀態連續移送 工奸出機,通過押出德 ^ 6〇〇c .... 、剛模押出成膠條狀,水冷(水溫 度60C之浴),以膠條 切斷,得到熔融流速(ISO· 105995.doc •16- 1275477 1139-C〇ndl3)1.0 g/10分之圓柱狀甲基丙烯酸樹脂聚合體 (聚合體-B)。聚合體-B之長徑(al)、短徑(Μ)、長度仏)分 別為(al)2.773 mm、(bl)2.689 mm、(l)3.1〇5 纖、 (bl)/(al)0.97,視密度為 〇·67 g/ml。 (扁平狀甲基丙烯酸樹脂聚合體(聚合體-c)之製造) 於聚合體之製造工序,代替以模具押出成膠條,水冷 後以切割機切斷,以模具於水中押出切斷之水中切割方式 切斷,得到熔融流速(ISCM139-Condl3)l.〇 g/l〇分之扁平 狀甲基丙烯酸樹脂聚合體(聚合體_c)。聚合體_c之長徑 (a2)、短徑(b2)、厚度(τ)分別為(a2)3178 mm ' (b2)3〇89 mm、(Τ)1·505 mm、(b2)/(a2)0.97,視密度為 〇·68 g/nU。 (無定形狀甲基丙烯酸樹脂聚合體c聚合體_D)之製造) 使用聚合體-A用押出片材成形機,其包含:具有片材用 T型模具(模具溫度j5〇°C)之150 mm單軸押出機(機筒溫 度··由進料側 200°C -210°C -210°C -260°C ·260°(: -240°C )、調 溫之3支拋光輥(輥溫度·· 80°c )及拉取裝置者,以押出量 600 kg/hr押出,得到寬1000 mm厚6 mm之甲基丙烯酸樹脂 押出板。其次’將該押出板使用株式會社H〇raI製粉碎機 (U10-30120XLFX)(篩網:1〇 ιηηιφ)粉碎,得到無定形狀甲 基丙烯酸樹脂聚合體(聚合體_D)。聚合體_D之視密度為 〇·60 g/ml。 實施例1 將聚合體-A100重量部及聚合體-D50重量部之混合物(視 逸、度0.83 g/ml)用押出片材成形機,其包含:具有片材用τ 105995.doc -17- 1275477 型模具(模具溫度:250°C )之150 mm單軸押出機(機筒溫 度:由進料側 200°C -210°C -210°C -260°C -260°C -240°C )、調 溫之3支拋光輥(輥溫度·· 80°C )及拉取裝置者,以押出量 600 kg/h押出,得到寬1 000 mm厚6 mm之甲基丙烯酸樹脂 押出板(押出板-A)。於表1表示測定圖1所示厚度測試點, 算出板厚精度之結果。 接著由所得押出板以圓蘇切出寬241 mm、長3 19 mm之 尺寸,將切出板之切割面用精密研磨機(PLA-BEAUTY:MEGARAO TECHNICA(株)製)研磨,進一步施以 拋光研磨做成鏡面狀。接著,使用15吋施以圖點灰階之印 刷網版,墨水使用 MatmediumSR931 (MINOGROUP 製), 於導光板之單面進行網版印刷得到導光板。於表1表示亮 度、免度斑之測定結果。 實施例2 將用於實施例1之聚合體-D之調配量為1 00重量部之混合 物(視密度〇·88 g/ml)以外,與實施例1同樣地得到押出板_ B。 與實施例1同樣地進行厚度測定、亮度、亮度斑之測 定,結果示於表-1。 <比較例1 > 將用於實施例1之聚合體-D之調配量為400重量部之混合 物(視密度0.7 g/ml)以外,與實施例1同樣地得到押出板- C。 與實施例1同樣地進行厚度測定、亮度、亮度斑之測 定,結果示於表-1。 <比較例2, 3> 105995.doc -18- 1275477 將用於實施例1之聚合體_A(視密度0·76 g/ml)及聚合體_ B(視密度0.60 g/ml),與實施例1同樣地分別單獨押出,得 到押出板-D及押出板-E。與實施例1同樣地進行厚度測 定、亮度、亮度斑之測定,結果示於表-1。 實施例3 代替用於實施例1之聚合體-A100重量部使用聚合體A-50 重量部、聚合體-B50重量部之混合物(視密度0.88 g/ml)以 外’與實施例1同樣地得到押出板-F。與實施例丨同樣地進 行厚度測定、亮度、亮度斑之測定,結果示於表_ j。 實施例4 代替用於實施例3之聚合體-B使用聚合體C之混合物(視 密度0·87 g/ml)以外,與實施例1同樣地得到押出板。與 實施例1同樣地進行厚度測定、亮度、亮度斑之測定,結 果不於表-1。 實施例5 使用實施例1之押出原料成型板厚8 mm之甲基丙烯酸樹 脂押出板(押出板-H),與實施例1同樣地進行厚度測定、 亮度、亮度斑之測定,結果示於表_:[。 (結果之概要) 實施例1〜5之亮度、亮度斑均出現較比較例1〜3優越的性 能0 105995.doc -19- 1275477
105995.doc 1 亮度均勻度 (%) 00 CS ΓΠ 〇 00 00 平均亮度 (%) 1 2935 2928 2795 2790 2680 2928 2920 _1 1 2950 板厚精度 ί -Β(%) 1 -0.33 -0.30 -1.30 -1.32 ΓΠ 00 r—< 1 -0.32 -0.33 -0.19 最小板厚 (mm) 6.010 5.997 1 5.930 5.927 5.890 5.982 5.977 7.995 板厚精度 -A(%) j +0.25 +0.35 +1.26 +1.20 +2.17 +0.30 +0.38 +0.27 最大板厚 (mm) 6.045 6.084 6.078 6.130 6.019 6.020 1 8.032 平均板厚 (mm) 1 6.030 6.015 6.008 6.006 6.000 6.001 5.997 8.010 押出板 押出板-A 押出板-B 押出板-C 押出板-D 押出板-E 押出板-F 押出板-G 押出板·Η 聚合體(重量部) Q 〇 1—( 400 〇 〇 U 〇 〇 〇 〇 〇 〇 〇 PQ 〇 〇 〇 〇 〇 〇 〇 < 〇 〇 ψ < 〇 r-H 〇 〇 〇 實施例1 實施例2 比較例1 比較例2 比較例3 實施例3 實施例4 實施例5 -20- 1275477 產業上利用的可能性 本發明之導光板,可適於:用於個人電腦或文書處理器 等辦公室自動化機器、顯系圖像信號之各種監視器、例士 用於面板監視器、電視監視器等之顯示褽置及用於室内外 空間之照明裝置之顯示裝置、或看板等。 【圖式簡單說明】 圖1係表示本發明之厚度測定點者。 駐:系表不使用本發明之導光板之邊緣燈方式液晶光源 衷置之亮度評估方法之一例者。 【主要元件符號說明】 A 光源(冷陰極管) B 燈箱 C 導光板 D 反光片 E 光擴散片 105995.doc
Claims (1)
1275477 十、申請專利範圍: 1· -種導光板用甲基丙烯酸樹脂押出板之製造方法,里特 徵在於:將視密度ο·63 g/ml〜0.78 g/ml之定形狀甲基丙 烯酸樹脂聚合體與視密度〇.55 g/ml~〇 63 g/ml2無定形 狀甲基丙烯酸樹脂聚合體混合成視密度〇 8〇 “Μ以上, 將所得混合物押出成形,板厚為2 0〜15 0 mm,寬方向之 板厚精度為平均板厚之士 1.0%以内。 2·如请求項1之導光板用曱基丙烯酸樹脂押出板之製造方 法’其中該板厚為3.5〜8.5 mm,且寬方向之板厚精度為 平均板厚之±0.5%以内。 3 · 一種導光板用甲基丙烯酸樹脂押出板,其係以請求項1 或2之方法製造者。
105995.doc
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