CN114859604A - Shading reflection film, backlight module and preparation method thereof - Google Patents
Shading reflection film, backlight module and preparation method thereof Download PDFInfo
- Publication number
- CN114859604A CN114859604A CN202210619521.XA CN202210619521A CN114859604A CN 114859604 A CN114859604 A CN 114859604A CN 202210619521 A CN202210619521 A CN 202210619521A CN 114859604 A CN114859604 A CN 114859604A
- Authority
- CN
- China
- Prior art keywords
- light
- shading
- shielding
- film
- reflecting
- 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.)
- Granted
Links
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 105
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000001125 extrusion Methods 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000004743 Polypropylene Substances 0.000 claims description 16
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- -1 polypropylene Polymers 0.000 claims description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 11
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 4
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 4
- 239000011667 zinc carbonate Substances 0.000 claims description 4
- 235000004416 zinc carbonate Nutrition 0.000 claims description 4
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 238000002310 reflectometry Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 70
- 239000010410 layer Substances 0.000 description 48
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 32
- 239000003063 flame retardant Substances 0.000 description 32
- 239000003963 antioxidant agent Substances 0.000 description 27
- 230000003078 antioxidant effect Effects 0.000 description 27
- 239000002216 antistatic agent Substances 0.000 description 27
- 230000008569 process Effects 0.000 description 17
- 238000000576 coating method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000009472 formulation Methods 0.000 description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 6
- 239000004926 polymethyl methacrylate Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000003666 anti-fingerprint Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- BGGGMYCMZTXZBY-UHFFFAOYSA-N (3-hydroxyphenyl) phosphono hydrogen phosphate Chemical compound OC1=CC=CC(OP(O)(=O)OP(O)(O)=O)=C1 BGGGMYCMZTXZBY-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- LAUIXFSZFKWUCT-UHFFFAOYSA-N [4-[2-(4-phosphonooxyphenyl)propan-2-yl]phenyl] dihydrogen phosphate Chemical compound C=1C=C(OP(O)(O)=O)C=CC=1C(C)(C)C1=CC=C(OP(O)(O)=O)C=C1 LAUIXFSZFKWUCT-UHFFFAOYSA-N 0.000 description 1
- 239000006116 anti-fingerprint coating Substances 0.000 description 1
- OZJDKMBIEWVOEH-UHFFFAOYSA-N benzene-1,4-diol;phosphono dihydrogen phosphate Chemical compound OC1=CC=C(O)C=C1.OP(O)(=O)OP(O)(O)=O OZJDKMBIEWVOEH-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- ZZNQQQWFKKTOSD-UHFFFAOYSA-N diethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OCC)(OCC)C1=CC=CC=C1 ZZNQQQWFKKTOSD-UHFFFAOYSA-N 0.000 description 1
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 description 1
- OIKHZBFJHONJJB-UHFFFAOYSA-N dimethyl(phenyl)silicon Chemical compound C[Si](C)C1=CC=CC=C1 OIKHZBFJHONJJB-UHFFFAOYSA-N 0.000 description 1
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 description 1
- FHQRQPAFALORSL-UHFFFAOYSA-N dimethylsilyl(trimethyl)silane Chemical compound C[SiH](C)[Si](C)(C)C FHQRQPAFALORSL-UHFFFAOYSA-N 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- RSIHJDGMBDPTIM-UHFFFAOYSA-N ethoxy(trimethyl)silane Chemical compound CCO[Si](C)(C)C RSIHJDGMBDPTIM-UHFFFAOYSA-N 0.000 description 1
- QGBMSFLTRRZTGI-UHFFFAOYSA-N ethyl(dimethyl)silane Chemical compound CC[SiH](C)C QGBMSFLTRRZTGI-UHFFFAOYSA-N 0.000 description 1
- 239000012757 flame retardant agent Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([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
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- 239000001226 triphosphate Substances 0.000 description 1
- 235000011178 triphosphate Nutrition 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
- KOWVWXQNQNCRRS-UHFFFAOYSA-N tris(2,4-dimethylphenyl) phosphate Chemical compound CC1=CC(C)=CC=C1OP(=O)(OC=1C(=CC(C)=CC=1)C)OC1=CC=C(C)C=C1C KOWVWXQNQNCRRS-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Images
Classifications
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
- B29D11/00788—Producing optical films
-
- 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
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
- C08J2333/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- 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
- C08J2433/00—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
- C08J2433/04—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
- C08J2433/06—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
- C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
- C08K2003/3036—Sulfides of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Optical Elements Other Than Lenses (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a light shading reflection film, a backlight module and a preparation method thereof, which are mainly used for solving the problem of light leakage of a thin reflection film/sheet, wherein the light shading reflection film is a double-sided film which is prepared by adopting a one-step processing and forming method based on a reflection material and a light shading material and has a reflection surface and a light shading surface, and has high light shading effect and high reflectivity. In order to better prepare the shading reflection film, the invention also provides a method for preparing the shading reflection film by adopting a multilayer co-extrusion technology, and the shading reflection film can also be used for a backlight module and the preparation thereof.
Description
Technical Field
The invention belongs to the field of optical film materials, and particularly relates to a light shading reflection film, a backlight module and a preparation method of the light shading reflection film.
Background
Flat panel displays have been widely used in televisions, computer monitors, notebook computers, mobile phones, digital cameras, palm top computers, GPS navigators, light-guiding keyboards, and the like. The image light source of these liquid crystal displays is provided by the backlight module therein, and the performance of the backlight module directly affects the display quality of the LCD, especially the brightness of the backlight source, and directly affects the brightness of the LCD surface. According to the position difference of the light source, the backlight module can be divided into an edge-light type backlight module and a direct type backlight module, and as the LCD module is continuously developed to the directions of being brighter, lighter and thinner, the edge-light type LED backlight becomes the mainstream of the development of the backlight source at present.
In addition, in the keyboard system, the trend of using the light guiding keyboard is continuously growing in recent years. The application of the light-guiding keyboard comprises the keyboard field of a notebook computer besides a common display keyboard. These light guiding keyboards are also composed of a backlight module of the keyboard, and the characteristic is to provide enough brightness under each key so that the keyboard emits light.
The liquid crystal backlight and light guide keyboard module mainly comprises a light source, a reflector, a light guide plate, and a plurality of light sourcesThe optical film-like composition has the characteristics of high brightness, long service life, uniform light emission and the like. The reflecting film/sheet mainly functions to reflect light leaking out of the bottom of the light guide plate efficiently without loss, thereby reducing light loss, reducing power consumption, and providing light saturation of the liquid crystal display panel. The reflective film/sheet is mainly made of transparent resin such as PET + TiO 2 The main principle of the system is TiO, and the system is made into a reflecting sheet through fine foaming 2 The refractive index of (2.62) is high, wherein the diameter of the bubble is about a few particles, the refractive index is 1.00, a good zigzag interface is formed between the bubble and the PET resin, and after light coming out of the light guide plate passes through the reflecting sheet, most of the light can return to the light guide plate through repeated refraction paths.
However, with the trend of light and thin display panels and light guide keyboards, the light and thin backlight module is currently the mainstream trend of light and thin, so that the backlight thickness needs to be effectively reduced by using a thin reflector plate, but the reduction of the thickness of the reflector plate brings with the reduction of the thickness of the reflector plate the phenomenon of light leakage at the back of the backlight module caused by the light transmission of the reflector plate, and further the backlight module is assembled on a system structure to cause system light leakage, so that the use requirement cannot be met.
At present, for the backlight light leakage phenomenon caused by the light transmission of the thin reflector, the following two solutions are mainly adopted:
first, a light-shielding coating process is applied to the back surface (non-light-transmitting plate contact surface) of the reflective sheet, for example: the patent publication No. CN 111239873A discloses a high light-shielding composite reflection plate and a preparation method thereof, which solves the problems of heavy weight and poor light-shielding performance of a backlight module and provides a composite reflection plate with a multilayer structure of a reflection layer/a support layer/a light-shielding layer or a reflection layer/a light-shielding layer/a support layer, wherein the light-shielding layer is prepared by forming a coating liquid by using light-shielding layer resin and a curing agent, then coating the coating liquid on a composite plate and carrying out cross-linking and curing.
Secondly, a non-light-transmitting film or material is attached to the back surface (non-light-transmitting plate contact surface) of the reflector plate, such as: the invention patent with publication number CN111694080A discloses a high-shielding fingerprint-resistant backlight module reflection film and a preparation process thereof, wherein the patent firstly coats a high-refraction layer for realizing the reflection function and an anti-fingerprint coating with the anti-fingerprint function on a base layer to prepare an anti-fingerprint reflection plate, and finally, a silver-plated film with the shading effect is attached to the surface of the anti-fingerprint reflection plate.
In both of the above two methods, the light shielding layer/film is added by coating or bonding on the basis of the existing reflector plate to achieve the purpose of reducing the light transmission of the reflector plate, but in the actual production process, the processing procedure of the reflector plate is complicated, the working hours are increased, and the material cost is increased.
Disclosure of Invention
The invention aims to solve the problem of light leakage of a thin reflecting film/sheet, and provides a light shading reflecting film/sheet which is a double-sided film with a reflecting surface and a light shading surface and is prepared by adopting a one-step processing and forming method based on a reflecting material and a light shading material, and has high light shading effect and high reflectivity. In order to better prepare the shading reflective film/sheet, the invention also provides a method for preparing the shading reflective film by adopting a multilayer co-extrusion technology. Meanwhile, the invention also provides a backlight module containing the shading reflective film and a preparation method thereof.
The invention is realized by the following technical scheme: a light shading reflection film is characterized in that a reflection material is homogenized and then is co-extruded with a light shading material to prepare a film with a double-sided structure, one side of the film is a reflection surface, the other side of the film is a light shading surface, the reflection material comprises optical transparent resin and inorganic particles, and the light shading material comprises resin and light shading master batch.
The reflecting surface comprises at least one reflecting layer made of a reflecting material; the shading surface comprises at least one shading layer made of shading materials.
The optically transparent resin is at least one selected from polypropylene resin (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polytrimethylene terephthalate, polybutylene terephthalate (PBT), Polycarbonate (PC) and polymethyl methacrylate (PMMA).
Or further selecting resin particles such as: particles made of a resin such as a polyester resin, a polyamide resin, a polyurethane resin, an acrylic resin, a methacrylic resin (e.g., PMMA), a polyamide resin, a polyethylene resin, a polypropylene resin, a polyvinyl chloride resin, a polyvinylidene 1, 1-dichloride resin, a polystyrene resin, a polyvinyl acetate resin, a fluorine resin, or a silicone resin.
The inorganic filler is at least one selected from calcium carbonate, magnesium carbonate, zinc carbonate, titanium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, zinc sulfide, calcium phosphate, silica, alumina, mica titanium, talc, clay, kaolin, lithium fluoride and calcium fluoride.
Further, other known various additives such as a flame retardant, an antioxidant, an antistatic agent, etc. may be further included in the reflective material. Therefore, the amounts of the components constituting the reflective material may be: 60-90% of optical transparent resin, 13.3-43.3% of inorganic filler, 3-6% of flame retardant, 1-3.0% of antioxidant and 2-5% of antistatic agent.
Further, the functional component in the light-shielding material is a light-shielding master batch such as a black master batch, and the light-shielding master batch is not particularly limited as long as the processability is not affected, and in addition, other various known additives such as a flame retardant, an antioxidant, an antistatic agent and the like may be similarly added to the resin selected for the light-shielding material. Therefore, the amounts of the respective components constituting the light-screening material may be respectively: 60-90% of resin, 0.3-1% of black master batch, 3-6% of flame retardant, 1-3.0% of antioxidant and 2-5% of antistatic agent.
The above-mentioned resin is an optically transparent resin, and the light shielding material is the same as or different from the optically transparent resin selected among the reflective materials. Furthermore, considering the forming effect of the co-extrusion process and the improvement of the weather resistance of the finished product, the scheme with the same optical transparent resin is preferred, and the finished product is not easy to deform due to the same material shrinkage rate and is not easy to warp and deform after the high-temperature high-humidity reliability test.
The flame retardant mentioned above preferably contains at least one of an organophosphorus flame retardant and a silicon-containing flame retardant. Among them, known organic phosphorus-containing flame retardants can be used, and specifically, bisphenol a diphosphate, hydroquinone diphosphate, resorcinol diphosphate, trisphenol triphosphate, and bisphenol a bis (xylyl phosphate) can be used, and they are selected as needed. Specific examples of the silicon-containing flame retardant include dimethoxydimethylsilane, diethoxydimethylsilane, ethoxytrimethylsilane, diethoxydiphenylsilane, triethoxyphenylsilane, dimethylphenylsilane, pentamethyldisilane, dimethylethylsilane, and poly (dimethylsiloxane) oligomer.
As the above-mentioned antioxidant, there may be mentioned, as a hindered phenol-based heat stabilizer, for example: 2-tert-butyl-6- (3-tert-butyl-2-hydroxy-5-methylbenzyl) benzylmethacrylate, 2-phenylphenacrylate, 6-di-tert-butylphenyl (methacrylate) and 6-penta-di-tert-amylphenyl (methacrylate).
The antistatic agents mentioned above may be mentioned, for example: stearyl trimethyl quaternary ammonium hydrochloride, stearamidopropyl hydroxyethyl quaternary ammonium nitrate, sodium p-nonylphenoxypropyl sulfonate, and the like.
A preparation method of the shading reflective film adopts the reflective material and the shading material, the homogenized reflective material and the homogenized shading material are respectively fed into an extruder, and the shading reflective film is obtained after multilayer co-extrusion, stretching and sizing.
Furthermore, the extruder can adopt conventional co-extrusion equipment, and in the preparation process, temperature control is a key, so that the optical performance of the film, including hue, transmittance and the like, is directly influenced. During the production process, the melting temperature of PC is controlled at 240 ℃, the melting temperature of PMMA is controlled at 200 ℃, and the melting temperature of PP is controlled at 170 ℃.
The stretching comprises the steps of longitudinally stretching the film sheet obtained by co-extrusion by 1.5-2 times and then transversely stretching by 1.5-2 times.
In the longitudinal stretching and the transverse stretching, the resin film deforms along with the stretching, but the resin film serving as particles does not deform along with the stretching, because a large number of cells with different sizes are formed around the particles, so that the diffuse reflection effect is achieved.
The thickness of the shading reflection film is 0.05-0.25 mm. The thickness of the related reflecting surface is 0.025-0.125 mm, and the thickness of the light shading surface is 0.025-0.125 mm.
A backlight module comprising the light-shielding reflective film according to claim 1.
A method for preparing a backlight module comprising a light-shielding reflection film, wherein the light-shielding reflection film is prepared by the method of claim 6.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention can be used for solving the light leakage problem of the thin reflecting film/sheet, provides the shading reflecting film which is prepared by co-extruding a reflecting material and a shading material at one time and has high shading and reflecting effects, has simple forming process, lower cost and short construction period, and is suitable for large-scale production, and the shading reflecting film in the invention has a double-sided structure, and the thickness of the film can be controlled within 0.05-0.25 mm.
(2) The co-extrusion process of the present invention can realize the thickness adjustment of the reflective layer and the light shielding layer to obtain films with different reflective effects. For example, in the practical application process, the thickness and the number of the reflective layer and the light-shielding layer can be adjusted arbitrarily according to the requirements of customers, so as to meet different application scenarios.
(3) The invention adopts the homogeneous reflective material as one of the raw materials, has good forming effect of the co-extrusion process, and can achieve the dimensional stability and weather resistance of the co-extruded product with higher quality.
(4) In the co-extrusion process, the high-quality optical property performance can be achieved by adjusting the proper temperature range, and the problems of yellowing color shift of raw materials or poor crystal melting and the like are easily caused due to over-high or over-low temperature, so that the hue and the transmittance of a finished product are influenced.
(5) In the invention, the selection of the light-shielding material and the reflective material is also one of the keys influencing the effect of the finished product of the co-extrusion process, for example, when the light-shielding material and the reflective material are selected from the same material, the finished product is not easy to deform due to the same shrinkage rate of the material, and is also not easy to warp and deform after a high-temperature high-humidity reliability test, so that the forming effect and the weather resistance of the finished product are both improved.
(6) The invention can further use the roller surface to make irregular embossing structure on the surface (shading surface) of the shading reflection film in the co-extrusion process, and directly make the surface of the shading layer presenting irregular depth surface characteristics in the extrusion process, for example, forming a concave-convex structure with height difference within 100um on the surface of the film, and the height average value needs to be larger than 1/2 of the highest and lowest height difference, so as to be beneficial to reducing the electrostatic adsorption between adjacent materials and avoiding the fingerprint or slight scratch of the assembling personnel.
(7) The invention utilizes the co-extrusion process to form a multi-layer reflecting layer, utilizes the hole density generated by the reflecting material to form the diffuse reflection of the finished product (the higher the hole density is, the more the diffuse reflection times can be formed), and simultaneously utilizes the co-extrusion process and the stretch forming process to adjust the thickness of the shading material to meet different application scenes, thereby obtaining the shading and reflecting film with high shading effect and high reflectivity, and the shading and reflecting film meets the effects that the light transmittance is less than 0.1 percent and the reflectivity is more than 90 percent.
(8) The shading reflective film is suitable for a backlight module of a liquid crystal or light guide keyboard, has V0 anti-burning grade, and also meets the safety standard requirements of terminal brand customers.
Drawings
Fig. 1 shows a conventional thin film reflective sheet obtained by coating or spreading.
Fig. 2 shows a conventional thin film reflective sheet obtained by lamination.
FIG. 3 is a schematic view of a double-layered light-shielding reflective film obtained by co-extrusion according to the present invention.
FIG. 4 is a schematic view of a multilayer opaque film obtained by co-extrusion according to the present invention.
Detailed Description
The objects, technical solutions and advantageous effects of the present invention will be described in further detail below.
It is to be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention claimed, and unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In order to solve the problem of backlight leakage caused by light transmission of the thin reflective sheet, the conventional method employs an additional process and material to reduce the light transmission of the reflective sheet, thereby causing the defects of complicated processing procedure, long time and high cost of the reflective plate. For example, as shown in fig. 1, a light shielding material is formed on a reflective material of a thin reflective sheet (an upper layer is a reflective material, and a lower layer is a light shielding material) by coating or spreading, or as shown in fig. 2, a light shielding material is formed on a reflective material of a thin reflective sheet (an upper layer is a reflective material, a middle layer is an adhesive layer, and a lower layer is a light shielding material) by attaching, when preparing, the thin reflective sheet can be prepared by an additional process, therefore, the defects of complicated processing procedure, long working time, and high cost exist, and the thin reflective sheet is not beneficial to the improvement of production efficiency of enterprises and large-scale production. In order to solve the above problems, the present invention provides a novel method for preparing a light-shielding reflective film, wherein the light-shielding reflective film is prepared by co-extrusion and stretching to be integrally formed, so that the manufacturing process of the light-shielding reflective film can be simplified, the production efficiency can be improved, the structure of the light-shielding reflective film can be reasonably controlled in the manufacturing process, and the light-shielding reflective film which meets the customer requirements and has high light-shielding effect and high reflectivity can be prepared.
The following examples are provided to illustrate specific embodiments of the present invention, and it is understood that the scope of the present invention is not limited to the following examples.
Example 1:
the formula of the reflecting material comprises: 80.0% of PP, 10.0% of titanium dioxide, 4.0% of zinc carbonate, 3.0% of flame retardant, 1.0% of antioxidant and 2.0% of antistatic agent.
The formula of the shading material comprises: 85.0% of PP, 5.0% of black master batch, 5.0% of flame retardant, 1.0% of antioxidant and 5.0% of antistatic agent.
The reflecting material and the shading material which are prepared according to the formula are respectively homogenized, and are fed into an extruder through a hopper according to the volume ratio of 3: 2, the temperature is controlled at 170 ℃, a membrane consisting of a reflecting layer and a shading layer is obtained through extrusion through a double-layer extrusion die head, the total thickness of the membrane is about 0.18mm, wherein the reflecting layer is about 0.12mm, and the shading layer is also about 0.06 mm.
The above-mentioned film is fed into a stretching process, after the film is longitudinally stretched by 1.5 times, then transversely stretched by 1.5 times, the light shading and reflecting film (the upper layer is a reflecting layer, and the lower layer is a light shading layer) shown in fig. 3 is obtained, the total thickness of the light shading and reflecting film is about 0.08mm, wherein the reflecting layer is about 0.055mm, and the light shading layer is also about 0.025 mm.
Example 2:
the formula of the reflecting material comprises: 75.7% of PP, 13.3% of silicon dioxide, 6.0% of flame retardant, 3.0% of antioxidant and 2.0% of antistatic agent.
The formula of the shading material comprises: 85.0% of PP, 1.0% of black master batch, 6.0% of flame retardant, 3.0% of antioxidant and 5.0% of antistatic agent.
The light-shielding reflective film having the structure shown in fig. 3 was prepared in the same manner as in example 1 using the reflective material and the light-shielding material of the above-described formulations.
Example 3:
the formula of the reflecting material comprises: 60.0% of PET, 13.3% of barium sulfate, 20.0% of zinc sulfide, 3.6% of flame retardant, 1.1% of antioxidant and 2.0% of antistatic agent.
The formula of the shading material comprises: 88.0 percent of PP, 0.5 percent of black master batch, 5.5 percent of flame retardant, 2.0 percent of antioxidant and 4.0 percent of antistatic agent.
The light-shielding reflective film having the structure shown in fig. 3 was prepared in the same manner as in example 1 using the reflective material and the light-shielding material of the above-described formulations.
Example 4:
the formula of the reflecting material comprises: 68.0 percent of PMMA, 25.0 percent of zinc oxide, 3.0 percent of flame retardant, 1.5 percent of antioxidant and 2.5 percent of antistatic agent.
The formula of the shading material comprises: 89.7 percent of PMMA, 0.3 percent of black master batch, 5.0 percent of flame retardant, 2.7 percent of antioxidant and 3.0 percent of antistatic agent.
Using the reflective material and the light-shielding material of the above-mentioned formulations, a light-shielding reflective film having a structure shown in FIG. 3 was prepared in the same manner as in example 1 (at a temperature of 200 ℃ C.).
Example 5:
the formula I of the reflecting material comprises: 80.0% of PP, 7.0% of silicon dioxide, 7.0% of mica, 3.0% of flame retardant, 1.0% of antioxidant and 2.0% of antistatic agent.
The formula II of the reflecting material is as follows: 80.0% of PP, 7.0% of silicon dioxide, 7.0% of calcium carbonate, 3.0% of flame retardant, 1.0% of antioxidant and 2.0% of antistatic agent.
The formula of the shading material comprises: 89.0% of PP, 1.0% of black master batch, 3.0% of flame retardant, 2.0% of antioxidant and 5.0% of antistatic agent.
The reflective material and the shading material adopting the formula are fed into an extruder through a hopper according to the volume ratio of 1.2: 1, the temperature is controlled at 170 ℃, and a film sheet consisting of a plurality of reflective layers and shading layers is obtained through extrusion through a three-layer extrusion die head, wherein the total thickness of the film sheet is about 0.3mm, the total thickness of the plurality of reflective layers is about 0.21mm, and the total thickness of the plurality of shading layers is about 0.09 mm.
And (3) the film is sent to a stretching process, the film is longitudinally stretched by 2 times and then transversely stretched by 2 times, and the shading and reflecting film (the upper two layers are reflecting layers, and the lower layer is a shading layer) shown in the figure 4 is obtained, wherein the total thickness of the shading and reflecting film is about 0.075mm, the two reflecting layers are about 0.053mm, and the shading layer is also about 0.022 mm.
Example 6:
the formula I of the reflecting material comprises: 66.0 percent of PP, 10.0 percent of magnesium carbonate, 10.0 percent of zinc carbonate, 6.0 percent of flame retardant, 3.0 percent of antioxidant and 5.0 percent of antistatic agent.
The formula II of the reflecting material is as follows: 76.0% of PP, 10.0% of silicon dioxide, 6.0% of flame retardant, 3.0% of antioxidant and 5.0% of antistatic agent.
The formula of the shading material comprises: 85.0% of PP, 1.0% of black master batch, 6.0% of flame retardant, 3.0% of antioxidant and 5.0% of antistatic agent.
The light-shielding reflection film having the structure shown in fig. 4 was prepared in the same manner as in example 5 using the reflection material and the light-shielding material of the above-described formulations.
Example 7:
the formula I of the reflecting material comprises: 72.0 percent of PC, 16.0 percent of calcium carbonate, 5.0 percent of flame retardant, 2.0 percent of antioxidant and 5.0 percent of antistatic agent.
The formula II of the reflecting material is as follows: 88.0 percent of PC, 6.0 percent of flame retardant, 1.0 percent of antioxidant and 5.0 percent of antistatic agent.
The formula of the shading material comprises: 87.2 percent of PC, 0.8 percent of black master batch, 5.0 percent of flame retardant, 2.0 percent of antioxidant and 5.0 percent of antistatic agent.
The light-shielding reflective film having the structure shown in fig. 4 was prepared in the same manner as in example 5 using the reflective material and the light-shielding material of the above-described formulations.
Example 8:
the formula I of the reflecting material comprises: 77.0% of PET, 16.0% of silicon dioxide, 4.0% of flame retardant, 1.0% of antioxidant and 2.0% of antistatic agent.
The formula II of the reflecting material is as follows: 90.0% of PET, 6.0% of flame retardant, 2.0% of antioxidant and 2.0% of antistatic agent.
The formula of the shading material comprises: 90.0% of PET, 1.0% of black master batch, 5.0% of flame retardant, 1.0% of antioxidant and 2.0% of antistatic agent.
Using the reflective material and the light-shielding material of the above-mentioned formulations, a light-shielding reflective film having a structure shown in FIG. 4 was prepared in the same manner as in example 5 (at a temperature of 260 ℃).
Comparative example 1:
the formula of the reflecting material comprises: PET, barium sulfate and a flame retardant in proper proportion.
The formula of the shading material comprises: PET, a flame retardant and a black master batch in a proper proportion.
The reflecting material and the shading material with the formula are adopted, a proper amount of homogenized reflecting material is fed into an extruder, the temperature is controlled to be 260 ℃, a reflecting film is obtained through extrusion, a proper amount of shading material is fed into the extruder, the temperature is controlled to be 260 ℃, the shading film is obtained through extrusion, an adhesive layer is attached to the reflecting film, then a shading layer is attached to the adhesive layer, and the thin film reflecting sheet with the structure shown in the figure 1 is prepared, wherein the total thickness of the thin film reflecting sheet is about 0.155mm, the reflecting material is about 0.08mm, and the shading material is about 0.075 mm.
The above examples 1 to 8 and comparative example 1 do not particularly limit the flame retardant, antioxidant and antistatic agent of the reflective material and light-shielding material, and can be selected conventionally according to the product requirements in practical use. Of course, the components selected for the flame retardant, the antioxidant and the antistatic agent in the selected examples and comparative document 1 were the same during the following tests of the present invention.
The light transmittance and reflectance tests were performed on the light-shielding and light-reflecting films of examples 1 to 8 and comparative example 1, as shown in table 1 below. The light transmittance test method employs known equipment such as: ASTM D1003 and NDH7000-2, reflectance testing methods used known equipment ASTM E2177 and UH4150 spectrophotometers.
TABLE 1
As can be seen from the above table, the light-shielding reflective films prepared by co-extrusion in examples 1 to 8 do not directly affect the reflectivity compared to the film reflective sheet in comparative example 1, and can also be used to prepare products with high light-shielding effect and high reflectivity. In addition, from the perspective of the preparation process, the co-extrusion process adopted in the embodiments 1 to 8 is simpler than that of the comparative example 1, is convenient for large-scale production, and is beneficial to improvement of the production efficiency. In addition, from the product thickness, the light-shielding reflective films of embodiments 1 to 8 are thinner than the film reflective sheet of comparative example 1 due to the lack of the adhesive layer, and can also meet the user requirement of light thinness of the backlight module.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A light-shielding reflective film, comprising: the film with the double-sided structure is prepared by homogenizing a reflecting material and then co-extruding the reflecting material and a shading material, wherein one side of the film is a reflecting surface, the other side of the film is a shading surface, the reflecting material comprises optical transparent resin and inorganic filler, and the shading material comprises resin and shading master batch.
2. The light shielding reflective film according to claim 1, wherein: the reflecting surface comprises at least one reflecting layer made of reflecting materials; the shading surface comprises at least one shading layer made of shading materials.
3. The light shielding reflective film according to claim 1, wherein: the optical transparent resin is at least one selected from polypropylene resin, polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate and polycarbonate.
4. The light shielding reflective film according to claim 1, wherein: the inorganic filler is at least one selected from calcium carbonate, magnesium carbonate, zinc carbonate, titanium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, zinc sulfide, calcium phosphate, silica, alumina, mica titanium, talc, clay, kaolin, lithium fluoride and calcium fluoride.
5. The light shielding reflection film according to claim 3, wherein: the resin is an optically transparent resin, and the light-shielding material is the same as or different from the optically transparent resin selected from the reflective materials.
6. A method for preparing a light shading reflection film is characterized by comprising the following steps: the reflective material and the light-shielding material according to claim 1, wherein the reflective material and the light-shielding material are respectively fed into an extruder after being homogenized, and the reflective film is obtained after co-extrusion, stretching and sizing.
7. The method for preparing a light-shielding reflective film according to claim 6, wherein: the stretching comprises the steps of longitudinally stretching the film sheet obtained by co-extrusion by 1.5-2 times and then transversely stretching by 1.5-2 times.
8. The method for preparing a light-shielding reflective film according to claim 6, wherein: the thickness of the shading reflection film is 0.05-0.25 mm.
9. A backlight module is characterized in that: comprising the light-shielding reflective film according to claim 1.
10. A method for preparing a backlight module is characterized in that: comprising a light-shielding reflection film obtained by the method according to claim 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210619521.XA CN114859604B (en) | 2022-06-02 | 2022-06-02 | Shading reflecting film, backlight module and preparation method of backlight module |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210619521.XA CN114859604B (en) | 2022-06-02 | 2022-06-02 | Shading reflecting film, backlight module and preparation method of backlight module |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114859604A true CN114859604A (en) | 2022-08-05 |
CN114859604B CN114859604B (en) | 2024-04-05 |
Family
ID=82641750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210619521.XA Active CN114859604B (en) | 2022-06-02 | 2022-06-02 | Shading reflecting film, backlight module and preparation method of backlight module |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114859604B (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006051712A (en) * | 2004-08-12 | 2006-02-23 | Mitsubishi Polyester Film Copp | Coextrusion-laminated polyesther film |
JP2006343445A (en) * | 2005-06-08 | 2006-12-21 | Mitsubishi Engineering Plastics Corp | Light reflecting material and its manufacturing method |
JP2007290164A (en) * | 2006-04-21 | 2007-11-08 | Toyobo Co Ltd | Laminated polyester film and mirror surface reflecting film |
CN102729552A (en) * | 2012-06-21 | 2012-10-17 | 绵阳龙华薄膜有限公司 | Black and white film |
KR20130118503A (en) * | 2012-04-20 | 2013-10-30 | (주)에이나노 | Reflection sheet for back light unit |
CN103542276A (en) * | 2012-07-17 | 2014-01-29 | 昆达电脑科技(昆山)有限公司 | Method for evening front light source of reflecting type display panel |
CN106739334A (en) * | 2016-12-14 | 2017-05-31 | 江苏瀚隆家纺有限公司 | A kind of light-proofness composite membrane and preparation method thereof |
-
2022
- 2022-06-02 CN CN202210619521.XA patent/CN114859604B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006051712A (en) * | 2004-08-12 | 2006-02-23 | Mitsubishi Polyester Film Copp | Coextrusion-laminated polyesther film |
JP2006343445A (en) * | 2005-06-08 | 2006-12-21 | Mitsubishi Engineering Plastics Corp | Light reflecting material and its manufacturing method |
JP2007290164A (en) * | 2006-04-21 | 2007-11-08 | Toyobo Co Ltd | Laminated polyester film and mirror surface reflecting film |
KR20130118503A (en) * | 2012-04-20 | 2013-10-30 | (주)에이나노 | Reflection sheet for back light unit |
CN102729552A (en) * | 2012-06-21 | 2012-10-17 | 绵阳龙华薄膜有限公司 | Black and white film |
CN103542276A (en) * | 2012-07-17 | 2014-01-29 | 昆达电脑科技(昆山)有限公司 | Method for evening front light source of reflecting type display panel |
CN106739334A (en) * | 2016-12-14 | 2017-05-31 | 江苏瀚隆家纺有限公司 | A kind of light-proofness composite membrane and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
CN114859604B (en) | 2024-04-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8899815B2 (en) | Uniform reflective light-guide apparatus with micro-structure, and backlight module and LCD device having the same | |
JP2023524022A (en) | Display device with tiled components | |
US20070098998A1 (en) | Diffusion sheet and manufacturing method thereof | |
TW201317673A (en) | Transparent display | |
KR20180033507A (en) | Laminated sheet, liquid crystal display module, backlight unit and method for manufacturing laminated sheet | |
CN114236655A (en) | Multilayer co-extrusion structure diffusion plate and application and preparation method thereof | |
KR101090495B1 (en) | Diffusion film for led light | |
CN202791597U (en) | Backlight module for liquid crystal display device and liquid crystal display device | |
US20230161197A1 (en) | Backlights including patterned reflectors | |
CN114859604B (en) | Shading reflecting film, backlight module and preparation method of backlight module | |
KR20070117159A (en) | Embo unstretched optical film with superior optical properties and heat resistance | |
CN112180497A (en) | Glass light guide plate and glass diffusion plate fuse structure in a poor light | |
CN114919147B (en) | Preparation process of thin shading reflecting sheet for backlight module | |
CN102239433A (en) | Light reflector and planar light source device using same | |
CN201859228U (en) | Light diffusion plate | |
KR20150081963A (en) | Light diffusion plate | |
KR101068635B1 (en) | High brightness diffussion film improved engraving proportion and Preparing thereof | |
TWI518378B (en) | Light diffusing flakes and the use of this backlight | |
KR20120057048A (en) | Light diffusing film and liquid crystal display panel using the same | |
KR20130028270A (en) | Reflecting sheet and method for manufacturing the same, liquid crystal display device including reflecting sheet | |
JP2013225439A (en) | Backlight module, and liquid crystal display having this | |
KR100911367B1 (en) | Non oriented light diffusion sheet and manufacturing method thereof | |
CN213600912U (en) | Glass diffusion plate with surface coated and brightened | |
KR101044347B1 (en) | Method of preparing light diffusion sheet | |
CN214375370U (en) | Glass light guide plate and glass diffusion plate fuse structure in a poor light |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |