CN102514275A - Optical polyester thin film and preparation method thereof - Google Patents
Optical polyester thin film and preparation method thereof Download PDFInfo
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- CN102514275A CN102514275A CN2011103548762A CN201110354876A CN102514275A CN 102514275 A CN102514275 A CN 102514275A CN 2011103548762 A CN2011103548762 A CN 2011103548762A CN 201110354876 A CN201110354876 A CN 201110354876A CN 102514275 A CN102514275 A CN 102514275A
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- polyester
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- polyester film
- filler
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- 229920000728 polyester Polymers 0.000 title claims abstract description 62
- 230000003287 optical effect Effects 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000010409 thin film Substances 0.000 title abstract 6
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 230000037452 priming Effects 0.000 claims description 52
- 229920006267 polyester film Polymers 0.000 claims description 50
- 230000000873 masking effect Effects 0.000 claims description 34
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
- 210000002469 basement membrane Anatomy 0.000 claims description 13
- 238000005096 rolling process Methods 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 6
- 229910052810 boron oxide Inorganic materials 0.000 claims description 6
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 6
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910003437 indium oxide Inorganic materials 0.000 claims description 6
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000008247 solid mixture Substances 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- XRADHEAKQRNYQQ-UHFFFAOYSA-K trifluoroneodymium Chemical compound F[Nd](F)F XRADHEAKQRNYQQ-UHFFFAOYSA-K 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 7
- 239000010408 film Substances 0.000 abstract 5
- 239000011247 coating layer Substances 0.000 abstract 3
- 238000005034 decoration Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 description 20
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- 239000006185 dispersion Substances 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003431 cross linking reagent Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000080 wetting agent Substances 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 239000003643 water by type Substances 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 239000004816 latex Substances 0.000 description 4
- 229920000126 latex Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 210000004379 membrane Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-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
- MMEDJBFVJUFIDD-UHFFFAOYSA-N 2-[2-(carboxymethyl)phenyl]acetic acid Chemical compound OC(=O)CC1=CC=CC=C1CC(O)=O MMEDJBFVJUFIDD-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical class CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 125000005480 straight-chain fatty acid group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention relates to an optical polyester thin film and a preparation method thereof. The thin film comprises a biaxial tension polyester base film and a bottom coating layer coated on at least a surface of the polyester base film, wherein the bottom coating layer contains a filler with a refractive index of 1.55-2.50, and the coating liquid for forming the bottom coating layer comprises 5-10% by weight of a solid component content. The optical polyester thin film of the present invention has the following advantages that: the optical polyester thin film has high transparency, good adhesion and easy winding property; the generation of the interference rainbow fringe after the hard coating processing can be effectively solved; and the optical polyester thin film is applicable for various optical functional films for LCD, high-grade IMD film interior decoration processing and other high-end film material fields.
Description
Technical field
The present invention relates to a kind of optical polyester film and preparation method thereof; Be particularly related to the optical polyester film with anti-interference rainbow line, this optical polyester film is applicable to that various LCD are with high-end membrane material fields such as optical functional film and the processing of high-grade IMD film interior trim.
Background technology
Polyester film mainly adopts stretch processes to process; When producing biaxially oriented polyester film,, prevent the rolling adhesion for avoiding producing cut at film surface; Known method is in polyester slice, to add particulate filler; But the interpolation of particulate filler will influence the transparency of polyester film.
Optical polyester film is as the upstream materials of FPD, and its market potential is huge, and proportion and range of application are more and more widely in the middle of household electrical appliances; The optical polyester film that is used for high-grade IMD film interior trim manufacture field requires to have the good optical performance, heat endurance, printing, shock-resistant, damage resistant and good chemical stability.For purposes such as display and Dicoration base material; The present large tracts of landization of market demands product, but the thing followed particularly to film carry out interference rainbow line that hard conating processing produces require increasingly high since fluorescent lamp for the repeatability that realizes daylight with three-wavelength as main flow; So the rainbow line appears interfering in optical polyester film more easily that carry out after the hard conating processing; The existence of interference rainbow line has seriously restricted the application of product, in the process of using product, makes the people produce visual fatigue easily, therefore; How effectively solving and interfere the rainbow line, is the problem that those skilled in the art are concerned about always.
Carry out optical polyester film after the hard conating processing and produce and interfere the rainbow line owing to the difference of polyester film refractive index and hard conating refractive index produces, for the difference that reduces this refractive index to prevent to interfere the generation of line.The flat 7-151902 of Japan Patent TOHKEMY discloses a kind of through adding the method that metal oxide microparticle improves the hard conating refractive index in the hard conating resin, but there is following problem in it: the transparency of polyester film, scratch resistance, soil resistance etc. reduce because of interpolation metal oxide microparticle in hard conating; Disclose among the Japan Patent TOHKEMY 2002-210906 through suppressing the reflectivity at the back side; The method of the hard conating of range upon range of particular stiffness; When the reverse side setting of the hard conating of film has the coating of specific refractive index and specific thicknesses; Must the backside reflection rate be controlled at below 0.1%, but control very difficulty of backside reflection rate in this way.
Summary of the invention
For addressing the above problem; The purpose of this invention is to provide a kind of optical polyester film; Through modification is carried out on its surface, make it both have high transparent, good adhesion and easy rolling property, can effectively solve again and carry out the problem interference rainbow line that hard conating processing back occurs.
Another object of the present invention provides the preparation method of above-mentioned optical polyester film.
For realizing the foregoing invention purpose, the present invention takes following technical scheme:
A kind of optical polyester film; It comprises the polyester basement membrane of biaxial tension and is coated at least one surperficial priming coat of polyester basement membrane; After the improvement, contain refractive index in the said priming coat and be 1.55～2.50 filler, the content that forms solid composition in the masking liquid of priming coat is 5%～10% by weight.
Contain refractive index in the said priming coat and be 1.60～2.35 filler.
The average diameter of said filler is 0.02 μ m～0.50 μ m.
The average diameter of said filler is 0.05 μ m～0.20 μ m.
The thickness of said priming coat is 0.05～0.2 μ m.
Said filler is one or more in silica, zinc oxide, zinc sulphide, boron oxide, aluminium oxide, bismuth oxide, indium oxide, titanium dioxide, neodymium fluoride and the zirconium dioxide.
A kind of preparation method of optical polyester film, it carries out according to the following steps:
(1) dry polyester slice is melt extruded, melt is cooled to polyester-based thickness sheet on slab roller;
(2) containing refractive index at least one surface-coated of polyester-based thickness sheet is that the content of 1.55～2.50 filler, solid composition is 5%～10% priming coat masking liquid by weight;
(3) with 3.0～3.8 times of the polyester-based thickness sheet longitudinal stretchings of coating base coat masking liquid;
(4) with 3.0～4.0 times of cross directional stretch again after the polyester basement membrane preheating behind the longitudinal stretching, rolling obtains optical polyester film.
Compared with prior art, the present invention has the following advantages:
1. do not contain filler in the polyester basement membrane of the present invention, guaranteed the optical polyester film high transparent;
2. the content of solid composition in refractive index through in priming coat, adding filler in filler, the control priming coat and the masking liquid that forms priming coat; Make film have good adhesiveness and easy rolling property on the one hand, can prevent to carry out the interference rainbow line that hard conating processing back occurs on the other hand;
3. through the further thickness of control priming coat, improved the fastness of optical polyester film and other functional resin interlayers on the one hand, guaranteed that on the other hand priming coat can bring into play the inhibition effect to interference rainbow line;
4. optical polyester film provided by the invention is applicable to that various LCD are with high-end membrane material fields such as optical functional film and the processing of high-grade IMD film interior trim.
The specific embodiment
Polyester basement membrane according to the invention is mainly processed by polyester slice fusion biaxial tension; The polyester slice that is used for biaxial tension mainly is meant the condensation product of binary acid and dihydroxylic alcohols; Wherein, Binary acid can be a straight chain fatty acid, but mainly is aromatic diacid, like terephthalic acid (TPA), to phenylenediacetic Acid, to naphthalenedicarboxylic acid etc.; Dihydroxylic alcohols mainly is that carbon number is 2～4 aliphatic diol, like ethylene glycol, propane diols, butanediol etc.Except mentioned component, polyester slice can also be the polyester that adds the modification of materials such as a spot of M-phthalic acid, phthalic acid.The condensation polymer of preferred terephthalic acid (TPA) of the polyester slice in the invention and ethylene glycol.
Priming coat of the present invention is coated at least one surface of polyester basement membrane by the priming coat masking liquid and forms, and priming coat makes has good adhesiveness between polyester basement membrane and other functional resin layer, and significantly improves its processing characteristics.Contain adhesive and high index of refraction particulate filler in the masking liquid of formation priming coat,
It can be solvent type being fit to adhesive of the present invention, also can be water-based, the adhesive dispersion emulsion of preferred water-based.Be fit to adhesive of the present invention and can be selected from polyesters, polyurethane type resin, modified polyurethane resin class, esters of acrylic acid, in polyamide-based one or more; In adhesive, add crosslinking agent as required, crosslinking agent preferentially uses one or more in hexamethylene diisocyanate (HDI), toluene di-isocyanate(TDI) (TDI), methyl diphenylene diisocyanate (MDI), IPDI (IPDI), the tetramethylxylylene diisocyanate (TMXDI).
High index of refraction particulate filler of the present invention is meant that refractive index is 1.55～2.50 filler; Preferred index is 1.6～2.35 filler, when the refractive index of filler in the priming coat less than 1.55 or all can't effectively prevent to carry out the interference rainbow line that hard conating processing back occurs greater than 2.50 the time; The average diameter of high index of refraction particulate filler material is 0.02 μ m～0.50 μ m; If average diameter is less than 0.02 μ m; Then reduce the part optical property of film because of the addition of filler is more; If average diameter, then influences the adhesiveness and the easy rolling property of film greater than 0.50 μ m, the average diameter of high index of refraction particulate filler material further is preferably 0.05 μ m～0.20 μ m.
High index of refraction particulate filler of the present invention can be selected from one or more in silica, zinc oxide, zinc sulphide, boron oxide, aluminium oxide, bismuth oxide, indium oxide, titanium dioxide, neodymium fluoride and the zirconium dioxide.The high index of refraction particulate filler is dispersed in the emulsion, uses the aqueous dispersion emulsion of preferred silica, zinc oxide, boron oxide, aluminium oxide, bismuth oxide, indium oxide, titanium dioxide, zirconium dioxide behind the formation dispersion emulsion.The more preferably aqueous dispersion emulsion of silica, boron oxide, aluminium oxide, bismuth oxide, indium oxide, zirconium dioxide.
The percentage by weight of the solid composition of the masking liquid of formation priming coat is 5%～10%; Preferred water paint; In order to improve the wetability of bottom masking liquid; Silicon or the acrylic compounds that can add appropriate amount in the masking liquid wait the wetting agent that improves basement membrane, and the bottom fluid power evenly is coated with, and also can add additives such as antistatic additive, ultraviolet absorber, coupling agent and make priming coat have other functional characteristics such as antistatic, anti-ultraviolet.
Primer thickness among the present invention is controlled at 0.05～0.2 μ m, and with the fastness of raising optical polyester film and other functional resin interlayers, and the inhibition effect of rainbow line is interfered in the performance of assurance priming coat.When the thickness of priming coat is lower than 0.05 μ m or is higher than 0.2 μ m, relatively poor for the film surface adhesivity, and also insufficient to what interfere rainbow line inhibition effect also to become.
Among the present invention, the process of coating base coat step before the film biaxial tension is accomplished on the surface of polyester basement membrane, and coating method can adopt known manner such as intaglio plate roller coat, bar seam are coated with, pneumatic blade coating, dip-coating.
The manufacturing approach of optical polyester film is following,
1. crystallization and drying
The PETG section is the high polymer with moisture absorption tendency; Carrying out to carry out preparatory crystallization and dried earlier before the biaxial tension; Improve the softening point of polymer, avoid its dry with melt extrude the mutual adhesion of resin particle, caking in the process; Remove moisture in the resin, prevent that the polymer that contains ester group from hydrolytic degradation taking place and produce bubble in melt extruding process.In advance crystallization and baking temperature be about 160～180 ℃, crystallization time 10～20min, 4～6 hours drying times.
2. melt extrude
Polyester slice behind the crystallizing and drying melt extrudes through extruder, and extruder temperature is 210 ℃～280 ℃.
3. the polyester basement membrane is cast sheet
The melt that melt extrudes cools off on slab roller and forms polyester-based thickness sheet.
4. online coating (In-line coating)
Onlinely be coated with a kind of in the modes such as using intaglio plate roller coat, bar seam are coated with, pneumatic blade coating, dip-coating, contain adhesive and high index of refraction particulate filler priming coat masking liquid in the surface coated of polyester-based thickness sheet, the solid constituent percentage by weight of masking liquid is 5%～10%.
5. longitudinal stretching (MDO)
Longitudinal stretching be with from the polyester-based thickness sheet of casting sheet machine at the longitudinal stretching that carries out 3.0～3.8 multiples under the heated condition through pull-down roller and the speed difference between the withdrawing roll soon.
6. cross directional stretch (TDO)
Draw ratio: the cross directional stretch of 3.0～4.0 multiples, 190 ℃-210 ℃ of heat setting temperatures.
7. traction rolling
Film is accomplished rolling work at last through controlled pressure roller, crimp roll, guide roller.
Below in conjunction with specific embodiment the present invention is further described.
Embodiment 1
The preparation of priming coat masking liquid:
Water intaking based polyurethane class bottom adhesive emulsion NeoRoz R-620 (DSM provides) 15 parts; 0.1 part of wetting agent BYK-346 (Bi Ke chemistry); 1 part of crosslinking agent V-02 (day spinning) clearly, 80 parts of deionized waters add 0.8 part of the dispersion emulsion that contains the silica that refractive index is 1.55, average diameter is 0.079 μ m; Be uniformly dispersed through high-shear emulsion machine, obtaining solid content is the priming coat masking liquid of 5 quality %.
The preparation of polyester film:
Dry polyester slice is melt extruded, and melt is cooled to polyester-based thickness sheet on slab roller; With the above-mentioned priming coat masking liquid for preparing of two surface coated of polyester-based thickness sheet; With 3.8 times of the polyester-based thickness sheet longitudinal stretchings of surface-coated priming coat masking liquid; After the diaphragm preheating behind the longitudinal stretching, 4.0 times of cross directional stretch, rolling after 190 ℃ of thermal finalizations obtains the optical polyester film that thickness is 125um, and the thickness of priming coat is 0.05 μ m, surveys its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin RC29-120 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Embodiment 2
The preparation of priming coat masking liquid:
Water intaking property polyesters bottom adhesive latex A LFA 15GE (ALFA) 18 parts; 0.1 part of wetting agent BYK-346 (Bi Ke chemistry); 1 part of crosslinking agent V-02 (day is spinning clearly); 80 parts of deionized waters; Add that to contain refractive index be 2.18, average diameter is 1 part of the dispersion emulsion of the zirconium dioxide of 0.02 μ m, is uniformly dispersed through high-shear emulsion machine, and obtaining solid content is the priming coat masking liquid of 6 quality %.
The preparation of polyester film:
Dry polyester slice is melt extruded, and melt is cooled to polyester-based thickness sheet on slab roller; With the above-mentioned priming coat masking liquid for preparing of two surface coated of polyester-based thickness sheet; With 3.5 times of the polyester-based thickness sheet longitudinal stretchings of surface-coated priming coat masking liquid; After the diaphragm preheating behind the longitudinal stretching, 3.5 times of cross directional stretch, rolling after 200 ℃ of thermal finalizations obtains the optical polyester film that thickness is 175um, and the thickness of priming coat is 0.1 μ m, surveys its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin RC28-608 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Embodiment 3
The preparation of priming coat masking liquid:
10 parts of 10 parts of water intaking property polyesters and polyurethanes mixing bottom adhesive latex A LFA 15GE (ALFA) and NeoRoz R-620 (DSM); 0.1 part of wetting agent BYK-346 (Bi Ke chemistry); 1 part of crosslinking agent V-02 (day is spinning clearly); 80 parts of deionized waters; Add that to contain refractive index be 1.62, average diameter is 1.5 parts of the dispersion emulsions of the alundum (Al of 0.05 μ m, is uniformly dispersed through high-shear emulsion machine, and obtaining solid content is the priming coat masking liquid of 8 quality %.
The preparation of polyester film:
Dry polyester slice is melt extruded, and melt is cooled to polyester-based thickness sheet on slab roller; With the above-mentioned priming coat masking liquid for preparing of two surface coated of polyester-based thickness sheet; With 3.0 times of the polyester-based thickness sheet longitudinal stretchings of surface-coated priming coat masking liquid; After the diaphragm preheating behind the longitudinal stretching, 3.5 times of cross directional stretch, rolling after 210 ℃ of thermal finalizations obtains the optical polyester film that thickness is 188um, and the thickness of priming coat is 0.15 μ m, surveys its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin EKS-675 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Embodiment 4
The preparation of priming coat masking liquid:
10 parts of 10 parts of water intaking property polyesters and polyurethanes mixing bottom adhesive latex A LFA 15GE (ALFA) and NeoRoz R-620 (DSM); 0.1 part of wetting agent BYK-346 (Bi Ke chemistry); 1 part of crosslinking agent V-02 (day is spinning clearly); 80 parts of deionized waters; Add 1.0 parts of dispersion emulsions containing the boron oxide that refractive index is 2.0, average diameter is 0.2 μ m 0.5 part of indium oxide dispersion emulsion and refractive index are 2.3, average diameter is 0.1 μ m; Be uniformly dispersed through high-shear emulsion machine, obtaining solid content is the priming coat masking liquid of 10 quality %.
The preparation of polyester film:
Dry polyester slice is melt extruded, and melt is cooled to polyester-based thickness sheet on slab roller; With the above-mentioned priming coat masking liquid for preparing of two surface coated of polyester-based thickness sheet; With 3.0 times of the polyester-based thickness sheet longitudinal stretchings of surface-coated priming coat masking liquid; After the diaphragm preheating behind the longitudinal stretching, 3.0 times of cross directional stretch, rolling after 210 ℃ of thermal finalizations obtains the optical polyester film that thickness is 188um, and the thickness of priming coat is 0.2 μ m, surveys its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin V-4025 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Embodiment 5
The preparation of priming coat masking liquid:
10 parts of 10 parts of water intaking property polyesters and polyurethanes mixing bottom adhesive latex A LFA 15GE (ALFA) and NeoRoz R-620 (DSM); 0.1 part of wetting agent BYK-346 (Bi Ke chemistry); 1 part of crosslinking agent V-02 (day is spinning clearly); 80 parts of deionized waters; Add and to contain that refractive index is 2.45, average diameter is 0.5 part of the bismuth oxide dispersion emulsion of 0.5um and to contain 1.0 parts of the alundum (Al dispersion emulsions that refractive index is 1.62, average diameter is 0.3 μ m; Be uniformly dispersed through high-shear emulsion machine, obtaining solid content is the priming coat masking liquid of 10 quality %.
The preparation of polyester film:
Dry polyester slice is melt extruded, and melt is cooled to polyester-based thickness sheet on slab roller; With the above-mentioned priming coat masking liquid for preparing of two surface coated of polyester-based thickness sheet; With 3.0 times of the polyester-based thickness sheet longitudinal stretchings of surface-coated priming coat masking liquid; After the diaphragm preheating behind the longitudinal stretching, 3.0 times of cross directional stretch, rolling after 200 ℃ of thermal finalizations obtains the optical polyester film that thickness is 188um, and the thickness of priming coat is 0.2 μ m, surveys its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin V-6841 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Comparative example 1
Use 1 identical solvent with embodiment; Dispersion emulsion replaced with contain 1.5 parts of the calcirm-fluoride dispersion emulsions that refractive index is 1.23, average diameter is 80nm; Through manufacturing approach according to the invention, finally obtain the optical polyester film that thickness is 125um, survey its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin V-6841 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Comparative example 2
Use 1 identical solvent, do not add the particulate filler of high index of refraction with embodiment.Through manufacturing approach according to the invention, finally obtain the optical polyester film that thickness is 188um, survey its performance (seeing table 1).
On optical polyester film, carry out coating UV hardening resin V-6841 (DIC), rainbow line (seeing table 1) is interfered on the observation surface.
Table 1: each embodiment performance data table
The method of testing of each item performance is following in the table:
1. light transmittance, mist degree:
Denshoku NDH-4000 tests by ASTM D1003 prescriptive procedure.
2. tack:
In film surface coating UV cured resin coating, hundred lattice method of testing resin bed tacks judge that grade: 5B representes not come off; 4B representes that 5% area comes off with interior; 3B representes that the 5-15% area comes off; 2B representes that the 15-35% area comes off; 1B representes that the 35-65% area comes off; 0B representes to come off more than 65% area.
3. interfere the rainbow line:
The rainbow line is interfered on observation surface, and FNA-35 inspecting lamp, wavelength are 550～600nm, reflect visual, branch A, B, C Three Estate.A representes not have the rainbow line, B representes that slight rainbow line, C represent serious rainbow line.
Claims (7)
1. optical polyester film; It comprises the polyester basement membrane of biaxial tension and is coated at least one surperficial priming coat of polyester basement membrane; It is characterized in that; Contain refractive index in the said priming coat and be 1.55～2.50 filler, the content that forms solid composition in the masking liquid of priming coat is 5%～10% by weight.
2. optical polyester film according to claim 1 is characterized in that, contains refractive index in the said priming coat and be 1.60～2.35 filler.
3. optical polyester film according to claim 2 is characterized in that, the average diameter of said filler is 0.02 μ m～0.50 μ m.
4. optical polyester film according to claim 3 is characterized in that, the average diameter of said filler is 0.05 μ m～0.20 μ m.
5. optical polyester film according to claim 4 is characterized in that, the thickness of said priming coat is 0.05～0.2 μ m.
6. optical polyester film according to claim 5 is characterized in that, said filler is one or more in silica, zinc oxide, zinc sulphide, boron oxide, aluminium oxide, bismuth oxide, indium oxide, titanium dioxide, neodymium fluoride and the zirconium dioxide.
7. method for preparing like claim 1,2,3,4,5 or 6 said optical polyester films is characterized in that it may further comprise the steps:
(1) dry polyester slice is melt extruded, melt is cooled to polyester-based thickness sheet on slab roller;
(2) containing refractive index at least one surface-coated of polyester-based thickness sheet is that the content of 1.55～2.50 filler, solid composition is 5%～10% priming coat masking liquid by weight;
(3) with 3.0～3.8 times of the polyester-based thickness sheet longitudinal stretchings of coating base coat masking liquid;
(4) with 3.0～4.0 times of cross directional stretch again after the polyester basement membrane preheating behind the longitudinal stretching, rolling obtains optical polyester film.
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| CN103692748A (en) * | 2013-12-13 | 2014-04-02 | 合肥乐凯科技产业有限公司 | Optical polyester thin film |
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| CN105801894A (en) * | 2016-04-11 | 2016-07-27 | 江苏怡丽科姆新材料股份有限公司 | Preparation method of optical film |
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| CN108749232A (en) * | 2018-07-28 | 2018-11-06 | 汕头海洋第聚酯薄膜有限公司 | A kind of easily molded polyester film and preparation method thereof for in-mold transfer printing |
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| CN111993739B (en) * | 2019-05-27 | 2023-10-03 | 宁波长阳科技股份有限公司 | Transparent polyester film for multilayer coextrusion optics and preparation method thereof |
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| CN112844944A (en) * | 2021-02-24 | 2021-05-28 | 山东胜通光学材料科技有限公司 | Preparation method of low-color hardened precoated base film |
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Effective date of registration: 20240318 Address after: 230041 Lekai Industrial Park, zone a, Xinzhan Industrial Park, Xinzhan District, Hefei City, Anhui Province Patentee after: HEFEI LUCKY SCIENCE & TECHNOLOGY INDUSTRY Co.,Ltd. Country or region after: China Patentee after: LUCKY HEALTHCARE CO.,LTD. Patentee after: Tianjin Lekai Film Technology Co.,Ltd. Address before: 230041 Lekai Industrial Park, zone a, Xinzhan Industrial Park, Xinzhan District, Hefei City, Anhui Province Patentee before: HEFEI LUCKY SCIENCE & TECHNOLOGY INDUSTRY Co.,Ltd. Country or region before: China Patentee before: BAODING LUCKY FILM Co.,Ltd. Patentee before: Tianjin Lucky Film Co.,Ltd. |