CN102585447B - White polyester film and preparation method thereof - Google Patents
White polyester film and preparation method thereof Download PDFInfo
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- CN102585447B CN102585447B CN201110417629.2A CN201110417629A CN102585447B CN 102585447 B CN102585447 B CN 102585447B CN 201110417629 A CN201110417629 A CN 201110417629A CN 102585447 B CN102585447 B CN 102585447B
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- 229920006267 polyester film Polymers 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 75
- 229920000728 polyester Polymers 0.000 claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 24
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 19
- 230000008018 melting Effects 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 239000004408 titanium dioxide Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 13
- 239000006185 dispersion Substances 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 10
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 10
- 239000012964 benzotriazole Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000005453 pelletization Methods 0.000 claims description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 150000007520 diprotic acids Chemical class 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 21
- 238000002310 reflectometry Methods 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000004383 yellowing Methods 0.000 abstract 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 238000009998 heat setting Methods 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 6
- 238000010298 pulverizing process Methods 0.000 description 6
- 239000004135 Bone phosphate Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 3
- YAXWOADCWUUUNX-UHFFFAOYSA-N 1,2,2,3-tetramethylpiperidine Chemical group CC1CCCN(C)C1(C)C YAXWOADCWUUUNX-UHFFFAOYSA-N 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000005660 chlorination reaction Methods 0.000 description 3
- KUMNEOGIHFCNQW-UHFFFAOYSA-N diphenyl phosphite Chemical compound C=1C=CC=CC=1OP([O-])OC1=CC=CC=C1 KUMNEOGIHFCNQW-UHFFFAOYSA-N 0.000 description 3
- UMKARVFXJJITLN-UHFFFAOYSA-N lead;phosphorous acid Chemical compound [Pb].OP(O)O UMKARVFXJJITLN-UHFFFAOYSA-N 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229960003511 macrogol Drugs 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- HRRDCWDFRIJIQZ-UHFFFAOYSA-N naphthalene-1,8-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=C2C(C(=O)O)=CC=CC2=C1 HRRDCWDFRIJIQZ-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 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
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 2
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 2
- MNAHQWDCXOHBHK-UHFFFAOYSA-N 1-phenylpropane-1,1-diol Chemical compound CCC(O)(O)C1=CC=CC=C1 MNAHQWDCXOHBHK-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
- UNIYDALVXFPINL-UHFFFAOYSA-N 3-(2-methylprop-2-enoyloxy)propylsilicon Chemical compound CC(=C)C(=O)OCCC[Si] UNIYDALVXFPINL-UHFFFAOYSA-N 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- WZELXJBMMZFDDU-UHFFFAOYSA-N Imidazol-2-one Chemical class O=C1N=CC=N1 WZELXJBMMZFDDU-UHFFFAOYSA-N 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000004927 fusion Effects 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
- 150000002576 ketones Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Provided are a white polyester film and a preparation method thereof. The white polyester film is formed by pure polyester and a functional master batch in the two-direction drawing process. The functional master batch occupies 12% to 65% of that of the pure polyester and is composed of a first functional master batch and a second functional master batch, and the weight ratio of the first functional master batch and the second functional master batch ranges from 1.0:1 to 150:1. The film keeps high reflectivity and high hidden performance, has excellent ageing-resistant performance, and is capable of effectively preventing yellowing degradation, and simple in preparation method and process. The prepared white polyester film can be widely used in liquid crystal display industry and solar battery industry.
Description
Technical field
The present invention relates to white polyester film, more particularly, the present invention relates to a kind of ageing-resistant white polyester film and preparation method thereof.
Background technology
Polyester film (PET film) is the more comprehensive film of a kind of Performance Ratio, the advantage such as compared with other thermoplastic plastics, it has, and transmittance is good, glossy, mechanical property is excellent, obdurability and resistance to impact shock, and dimensional stabilizing.White polyester film is because high brightness, reflection characteristic and excellent disguise show and there is unique application the aspect such as solar cell at advertisement tag, image, particularly in flat pannel display industry, as the reflectance coating of backlight source module and indispensable.Method as exhibit high brilliance mainly contains: 1. in polyester film, add the inorganic particulates such as barium sulfate, utilize the interface of polyester and inorganic particulate and with particle for carrying out luminous reflectance in the hole interface of the small hole that core was generated; 2. in polyester film, add with the inconsistent resin of polyester and become small hole take it as karyomorphism, utilizing this hole interface to carry out luminous reflectance.
In recent years, along with white polyester film constantly expands in the application of liquid-crystal display industry and solar cell industry, easily there is hydrothermal aging and thermo-oxidative ageing in white polyester film, cause the problem of polyester film xanthochromia degraded also more and more to draw attention under hot conditions.Particularly solar cell backboard, performance requriements is at the outdoor application time limit more than 25 years, and this requires the PET film of one of solar cell backboard important composition to have excellent ageing-resistant performance, and this is that common PET film is beyond one's reach.Therefore, how solving the problem that hydrothermal aging and thermo-oxidative ageing easily occur under hot conditions that existing white polyester film exists in application, is the problem that industry is paid special attention to.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of white polyester film is provided, and this film, in keeping high-reflectivity and highly concealed type, has excellent ageing-resistant performance, can effectively stop the xanthochromia degraded of polyester film.
Another technical problem that the present invention will solve is: the preparation method that a kind of white polyester film is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of white polyester film, made through stretch processes by pure polyester and functional master batch, described functional master batch is 12%～65% of pure weight polyester, functional master batch is made up of the first functional master batch and the second functional master batch, and the weight ratio of the first functional master batch and the second functional master batch is 1.0:1～150:1.
Above-mentioned polyester film, described the first functional master batch is made up of 35～70% pure polyester, 27～55% titanium dioxide and 3～10% barium sulfate, zinc oxide or zirconium white; Described the first functional master batch is prepared by following method:
(1) by pure polyester drying and crushing;
(2) material step (1) being obtained mixes with titanium dioxide, barium sulfate, zinc oxide or zirconium white;
(3) mixture step (2) being obtained, through twin screw extruder extruding pelletization, is made the first functional master batch.
Above-mentioned polyester film, described the second functional master batch is made up of 87～99.8% pure polyester, 0.1～5% stablizer, 0.05～5% dispersion agent and 0.05～3% ultraviolet absorbers; Described the second functional master batch is prepared by following method:
(1) by pure polyester drying and crushing;
(2) stablizer, dispersion agent and ultraviolet absorbers are mixed;
(3) mixture that material step (1) being obtained and step (2) obtain is added to melting in twin screw extruder, granulation, makes the second functional master batch.
Above-mentioned polyester film, described stablizer is metallic salt or phosphoric acid ester.
Above-mentioned polyester film, described dispersion agent is polyethylene glycols or silicane.
Above-mentioned polyester film, described ultraviolet absorbers is benzotriazole category or hindered amines.
A preparation method for white polyester film, it carries out as follows:
(1) melt extrude: after pure polyester and functional master batch are pre-mixed to dry, melting, extrude by co-extrusion die head;
(2) slab: melt forms unformed polyester casting sheet on the cooling roller rotating, and the thickness of polyester casting sheet is 1500 μ m～5000 μ m;
(3) two-way stretch: by after the preheating of cooled polyester casting sheet, 2.0～4.4 times of longitudinal stretchings, then 2.5～4.5 times of cross directional stretchs;
(4) sizing rolling: by the film thermal sizing after stretching, rolling after cooling, obtains white polyester film.
Above-mentioned preparation method, described in to melt extrude temperature be 240 ℃ ~ 300 ℃.
Above-mentioned preparation method, described film thermal setting temperature is 170 ℃ ~ 200 ℃.
The beneficial effect that the present invention obtains is embodied in:
(1) the present invention is by controlling being used in combination of consumption, the first functional master batch and the second functional master batch of functional master batch, guarantee that film has high brightness, highly reflective and high shielding, stoped polyester is thermal ageing and thermo-oxidative ageing under hot conditions, make film there is excellent ageing-resistant performance, and then improved the service efficiency of product.
(2) the present invention is by previously prepared the first functional master batch and the second functional master batch, required additive is scattered among pure polyester equably, avoid the dispersion of these additives in polyester film inhomogeneous, guarantee that these additives and polyester film have better consistency, made polyester film properties stable and uniform more.
Embodiment
In the present invention, described pure polyester is the polymkeric substance of diprotic acid and dibasic alcohol, wherein, diprotic acid can be straight chain fat diacid, but is mainly aromatic diacid, as terephthalic acid, to phenylene-diacetic acid, to naphthalic acid etc., preferably terephthalic acid and to naphthalic acid, more preferably terephthalic acid; Dibasic alcohol is mainly that carbonatoms is 2～4 aliphatic diol, as ethylene glycol, propylene glycol, butyleneglycol etc., and preferably ethylene glycol and butyleneglycol, more preferably ethylene glycol.Except mentioned component, polyester slice can also be the modified copolyester that adds the materials such as a small amount of m-phthalic acid, phthalic acid, cyclohexanedimethanol, dihydroxyphenyl propane or NDA.Being applicable to pure polyester of the present invention is polyethylene terephthalate.
The first functional master batch of the present invention is made up of 35～70% pure polyester, 27～55% titanium dioxide, other inorganic particulates of 3～10%, other inorganic particulates can be selected from one or more among barium sulfate, zinc oxide, zirconium white, aluminum oxide, titanium oxide, stannic oxide, consider polyester film whiteness and concealed requirement, other inorganic particulates are preferably by barium sulfate, zinc oxide or zirconium white.Wherein, the particle diameter of titanium dioxide is controlled between 1.0～100 μ m, because add the whitening that micron-sized titanium dioxide can guarantee film, higher light stability and reflectivity.
The second functional master batch of the present invention is made up of 87～99.8% polyester, 0.1～5% stablizer, 0.05～5% dispersion agent and 0.05～3% ultraviolet absorbers.
Stablizer of the present invention, can be metallic salt, as lead sulfate tribasic, dibasic lead phosphite, calcium stearate and dimercapto 2-ethyl hexyl ethanoate dioctyltin, and preferably lead sulfate tribasic and dibasic lead phosphite; Also can be phosphoric acid ester, as triphenylphosphate and diphenyl phosphite, preferably diphenyl phosphite.
Dispersion agent of the present invention is polyethylene glycols or silicane, as Macrogol 200, poly(oxyethylene glycol) 400, vinyl silanes, aminosilane, methacryloxypropyl silane etc., preferably dispersing property excellent and with the good poly(oxyethylene glycol) 400 of polyester consistency.
Ultraviolet absorbers of the present invention, it can be hindered amines, as piperidine derivative, imidazolone derivatives and azacycloalkyl ketone derivatives etc., it can be benzotriazole category, as 2-(2 ˊ-hydroxyl-5 ˊ-aminomethyl phenyl) benzotriazole and 2-(2 ˊ-hydroxyl-3 ˊ, the tertiary phenyl of 5 ˊ-bis-)-5-chlorination benzotriazole, preferably there is tetramethyl piperidine analog derivative and the 2-(2 ˊ-hydroxyl-5 ˊ-aminomethyl phenyl of better thermostability and polyester consistency) benzotriazole.
The first functional master batch of the present invention can be made by following method: by weight percentage, 35～55% dried pure polyester slices are pulverized, mix with 27～55% titanium dioxide, 3～10% inorganic particulate, in twin screw extruder, under molten state, carry out surface treatment extruding pelletization, make the first functional master batch.
The second functional master batch of the present invention can be made by following method: by weight percentage, 87～99.8% dried pure polyester slices are pulverized, mix with 0.1～5% the stablizer mixing in advance, 0.05～5% dispersion agent and 0.05～3% ultraviolet absorbers, in twin screw extruder, under molten state, carry out surface treatment extruding pelletization, make the second functional master batch.
The first functional master batch of the present invention and the second functional master batch all adopt the method being pre-mixed, and can guarantee the dispersion of additive stable and uniform in polyester, avoid gathering and the precipitate and separate of additive in polyester fusion drawn process.
The thickness of polyester film of the present invention is at 0.02mm～0.35mm, preferably 0.05mm～0.30mm, more preferably 0.075mm～0.25mm.
The preparation method of white polyester film of the present invention, comprises the steps:
(1) pure polyester slice, the first functional master batch and the second functional master batch being pre-mixed to dry rear melting extrudes by co-extrusion die head;
(2) melt forms unformed polyester casting sheet on the cooling roller rotating, and the thickness of polyester casting sheet is 1500 μ m～5000 μ m.
(3) by after cooled sheet preheating, 2.4～4.4 times of longitudinal stretchings, 2.5～4.5 times of cross directional stretchs;
(4) by the film thermal sizing after stretching, rolling after cooling, obtains white polyester film.
The temperature that melt extrudes described in the present invention is 240 ℃ ~ 300 ℃, and described film thermal setting temperature is 170 ℃ ~ 200 ℃
Below in conjunction with specific embodiment, the present invention is specifically described, but the present invention is not limited thereto.
Embodiment 1
By the pure polyester drying and crushing of 70g, then mix with the titanium dioxide of 27g and the zirconium white of 3g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 99.8g; By 2-(2 ˊ-hydroxyl-3 ˊ of the aminosilane of 0.1g lead sulfate tribasic, 0.05g and 0.05g, the tertiary phenyl of 5 ˊ-bis-)-5-chlorination benzotriazole mixes; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After mixing in 150:1 ratio by the first functional master batch with containing the second functional master batch, mix in 12:88 ratio with pure polyester slice again, melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 1500 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 2.4:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 2.5:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 180 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Embodiment 2
By the pure polyester drying and crushing of 56g, then mix with the titanium dioxide of 40g and the zinc oxide of 4g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 98g; By 2-(2 ˊ-hydroxyl-5 ˊ-aminomethyl phenyl of the poly(oxyethylene glycol) 400 of 1.0g calcium stearate, 0.5g and 0.5g) benzotriazole mixes; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After the first functional master batch and the second functional master batch are mixed in 120:1 ratio, mix in 20:80 ratio with pure polyester slice again, melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 2000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 2.8:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 2.9:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 170 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Embodiment 3
By the pure polyester drying and crushing of 50g, then mix with the titanium dioxide of 44g and the zirconium white of 6g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 96g; The tetramethyl piperidine analog derivative of the Macrogol 200 of 2.0g dibasic lead phosphite, 1.0g and 1.0g is mixed; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After the first functional master batch and the second functional master batch are mixed in 90:1 ratio, then mix in 30:70 ratio with pure polyester slice.Melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 2500 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 3.1:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 3.2:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 180 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Embodiment 4
By the pure polyester drying and crushing of 35g, then mix with the titanium dioxide of 55g and the barium sulfate of 10g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 92.5g; By 2-(2 ˊ-hydroxyl-5 ˊ-aminomethyl phenyl of the vinyl silanes of 3.0g triphenylphosphate, 3.0g and 1.5g) benzotriazole mixes; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After the first functional master batch and the second functional master batch are mixed in 50:1 ratio, then mix in 40:60 ratio with pure polyester slice.Melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 3000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 3.5:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 3.4:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 190 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Embodiment 5
By the pure polyester drying and crushing of 40g, then mix with the titanium dioxide of 50g and the zinc oxide of 10g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 90g; By 2-(2 ˊ-hydroxyl-3 ˊ of the poly(oxyethylene glycol) 400 of 4g lead sulfate tribasic, 4g and 2g, the tertiary phenyl of 5 ˊ-bis-)-5-chlorination benzotriazole mixes; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After the first functional master batch and the second functional master batch are mixed in 20:1 ratio, then mix in 48:52 ratio with pure polyester slice.Melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 4000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 4.0:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 4.0:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 190 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Embodiment 6
By the pure polyester drying and crushing of 41g, then mix with the titanium dioxide of 55g and the barium sulfate of 4g, through twin screw extruder extruding pelletization, make the first functional master batch, for subsequent use.
By the pure polyester drying and crushing of 87g; The tetramethyl piperidine analog derivative of the diphenyl phosphite of 5g lead sulfate tribasic, 5g and 3g is mixed; Polyester by mixture and after pulverizing is added to melting in twin screw extruder, granulation, makes the second functional master batch, for subsequent use.
After the first functional master batch and the second functional master batch are mixed in 1:1 ratio, then mix in 65:35 ratio with pure polyester slice.Melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 5000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 4.4:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 4.5:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 200 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Comparative example 1
By pure polyester through after drying crystalline with pure polyester by 35g, 55g titanium dioxide, after the masterbatch of 10g barium sulfate composition mixes in 52:48 ratio, melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 3000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 3.5:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 3.4:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 180 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain white polyester film, survey its optics, mechanics and hydrothermal aging performance.
Comparative example 2
By pure polyester with by by pure 90g polyester, the stablizer of 4g, after the second functional master batch of the dispersion agent of 4g and the ultraviolet absorbers of 2g mixes in 97.7:2.3 ratio, melting in twin screw extruder, be cast on the cooling roller of rotation, obtain the amorphous casting sheet that thickness is about 3000 μ m, this casting sheet is preheating to 100 ℃ through infrared, multiplying power with 3.5:1 is carried out longitudinal stretching, sheet film after longitudinal stretching is delivered in horizontal tenter machine, multiplying power with 3.4:1 under the condition of approximately 110 ℃ is carried out cross directional stretch, through polyester film heat setting type under about 180 ℃ of conditions of biaxial stretch-formed orientation, finally through overcooling, the processes such as rolling obtain transparent polyester film, survey its optics, mechanics and hydrothermal aging performance.
Table one: aging front and back optical property and mechanical property contrast
In table, the testing method of properties is as follows:
1. reflectivity: with Hitachi manufacture spectrophotometer U-3310 test.
2. tensile strength and elongation at break: according to GB/T13542.2-2009 standard testing.
3. percent thermal shrinkage: according to GB/T13542.2-2009 standard testing.
4. hydrothermal aging performance: with reference to ASTMD-257 standard, wherein print is 85 ℃ of temperature, outer 25 years of fixed temperature and humidity 2000h(respective chamber/chambers under humidity 85% condition).
Claims (7)
1. a white polyester film, it is made through stretch processes by pure polyester and functional master batch, it is characterized in that, described functional master batch is 12%～65% of pure weight polyester, functional master batch is made up of the first functional master batch and the second functional master batch, and the weight ratio of the first functional master batch and the second functional master batch is 1.0:1～150:1;
Described the first functional master batch is made up of 35～70% pure polyester, 27～55% titanium dioxide and 3～10% barium sulfate, zinc oxide or zirconium white; Described the first functional master batch is prepared by following method:
(1) by pure polyester drying and crushing;
(2) material step (1) being obtained mixes with titanium dioxide, barium sulfate, zinc oxide or zirconium white;
(3) mixture step (2) being obtained, through twin screw extruder extruding pelletization, is made the first functional master batch;
Described the second functional master batch is made up of 87～99.8% pure polyester, 0.1～5% stablizer, 0.05～5% dispersion agent and 0.05～3% ultraviolet absorbers; Described the second functional master batch is prepared by following method:
(1) by pure polyester drying and crushing;
(2) stablizer, dispersion agent and ultraviolet absorbers are mixed;
(3) mixture that material step (1) being obtained and step (2) obtain is added to melting in twin screw extruder, granulation, makes the second functional master batch;
Described pure polyester is the polymkeric substance of diprotic acid and dibasic alcohol.
2. white polyester film according to claim 1, is characterized in that, described stablizer is metallic salt or phosphoric acid ester.
3. white polyester film according to claim 2, is characterized in that, described dispersion agent is polyethylene glycols or silicane.
4. white polyester film according to claim 3, is characterized in that, described ultraviolet absorbers is benzotriazole category or hindered amines.
5. a method of preparing white polyester film as described in claim 1,2,3 or 4, is characterized in that: it carries out as follows:
(1) melt extrude: after pure polyester and functional master batch are pre-mixed to dry, melting, extrude by co-extrusion die head;
(2) slab: melt forms unformed polyester casting sheet on the cooling roller rotating, and the thickness of polyester casting sheet is 1500 μ m～5000 μ m;
(3) two-way stretch: by after the preheating of cooled polyester casting sheet, 2.0～4.4 times of longitudinal stretchings, then 2.5～4.5 times of cross directional stretchs;
(4) sizing rolling: by the film thermal sizing after stretching, rolling after cooling, obtains white polyester film.
6. preparation method according to claim 5, is characterized in that, described in to melt extrude temperature be 240 ℃ ~ 300 ℃.
7. preparation method according to claim 6, is characterized in that, described film thermal setting temperature is 170 ℃ ~ 200 ℃.
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| CN115625870A (en) * | 2022-11-30 | 2023-01-20 | 江苏康辉新材料科技有限公司 | Super-weather-resistant white polyester film and preparation method thereof |
| CN116814048A (en) * | 2023-06-29 | 2023-09-29 | 常州勤邦新材料科技有限公司 | Functional master batch for producing UV-resistant polyester chips |
| CN116836524B (en) * | 2023-07-31 | 2024-04-02 | 常州勤邦新材料科技有限公司 | Polyester functional master batch for producing high-reflection backboard film |
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| CN101733925A (en) * | 2009-10-26 | 2010-06-16 | 申达集团有限公司 | Method for preparing polyester film for photovoltaic cell backplane |
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| CN101733925A (en) * | 2009-10-26 | 2010-06-16 | 申达集团有限公司 | Method for preparing polyester film for photovoltaic cell backplane |
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