CN100387643C - Polyester film and producing process thereof - Google Patents
Polyester film and producing process thereof Download PDFInfo
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- CN100387643C CN100387643C CNB021385955A CN02138595A CN100387643C CN 100387643 C CN100387643 C CN 100387643C CN B021385955 A CNB021385955 A CN B021385955A CN 02138595 A CN02138595 A CN 02138595A CN 100387643 C CN100387643 C CN 100387643C
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Abstract
The present invention discloses a polyester film which comprises a super glossy polyester slice material of which the viscidity is more than 0.62, wherein the processing material also comprises regeneration particles of which the viscidity is more than 0.58 and a silicon oxide polyester slice of which the viscidity is more than 0.62. A manufacture method of the polyester film comprises that the super glossy polyester slice, the regeneration particles, the silicon oxide polyester slice, a p-terephthalic acid (IPA) super glossy polyester slice and a calcium acetate polyester slice are proportionally mixed to be manufactured by drying, extrusion, filtration, metering, casting film, longitudinal stretching, lateral stretching, heat-setting and slitting. The present invention effectively reduces product cost, improves product performance, improves stability at high temperature, and prevents environmental pollution in the process of production; DC and AC of the dielectric strength of the present invention can be respectively improved by about 10%, and the present invention has the advantage of short production route of a raw material.
Description
Technical field
The present invention relates to a kind of polyester film and manufacture method thereof, relate in particular to a kind of polyester film and manufacture method thereof that can be used as condenser dielectric, insulating material.
Background technology
In the production process of polyester film, because of the decision of factors such as production technique and manufacture method, will inevitably produce a large amount of waste materials, particularly adopt in the film forming process of two-way stretch, can produce limit film and the useless film of about 20-50%, if these polyester waste materials can not directly be recycled, will certainly increase the manufacturing cost of polyester film, and result in hand cramps to its processing.Because polyester film generally all has better physical, chemical property and superior electrical property, therefore often can be used as condenser dielectric and insulating material.At present, in the production of the polyester film of using as insulating material and condenser dielectric, there is no the report that adds polyester waste material, and the production of these polyester films, major part is to adopt the operational path that adds calcium particle and adopt the synthetic master batch section of ester-interchange method (hereinafter to be referred as " DMT method ").
Polyester film for capacitors research is abroad compared early with report, and content related to the present invention mainly contains:
In the course of processing of polyester film, be to guarantee polyester film membrane and the operability of post-treatment and the performance requriements of film, in polyester, must add a spot of fine solid particles, this minuteness particle can obtain by the method for interpolation outward or " in analyse ".The additive of polyester film master batch can adopt silicon-dioxide, silica and lime carbonate etc., but this master batch generally uses ester-interchange method production.Once reported the production method of Japanese Supreme Being people company agreeable type polyester film as " petrochemical complex is dynamic " 1998 (6), usually adopting to add makes film surface form concavo-convex atomic method, micropartical can use silica-based inorganic fine particles in its prescription, also can use organic fillers such as crosslinked polyethylene.Toray company adds special-purpose silicone resin particle and inactive inorganic particulate when producing the good polyester film of flatness, fields such as that made biaxially-oriented polyester can be used for is electric, base film.Company is spun in the production of transparent polyester film by Japan, and silica dispersions is made the overlay of film, and the silica colloidal average particle size that is added is the 3-7 micron.
In addition, European patent EP 602583A2, EP545227A2, EP484956A2, Japanese patent laid-open 10-163064 etc. have reported that the electricity that contains silicon microparticle is with the device polyester film.
In recent years, domestic also have a report that carries out polyester film for capacitors research and development, having reported the meagre polyester of two-way stretch (be called for short BOPET) of Dandong plastics one factories as Chinese technological achievement complete works, is through vacuum-drying, a kind of capacitor insulation dielectric film of melt extruding amorphous sheet, making to technology such as stretching, thermal-setting and cooling in length and breadth by polyethylene terephthalate (hereinafter to be referred as " PET ").
At present, because domestic and international various polyester film for capacitors all do not adopt the regenerated polyester film as adding raw material during fabrication, therefore, the production cost of this polyester film is higher usually; Simultaneously, existing polyester film production is because the overwhelming majority all adopts the DMT method to produce the master batch section, and used deleterious methyl alcohol man-hour in adding of raw material, therefore, not only the operational path of polyester film raw material production is longer, and production environment has also been caused pollution.In addition, at the aspect of performance of product, the ordinary capacitor medium is about 500V/ μ with the dielectric strength DC of polyester film, AC is about 220V/ μ, high temperature resistant usually in 100 ℃, these performance index are on the low side, thereby might influence the scope and the effect of its use in actual use.
Summary of the invention
The object of the present invention is to provide a kind of regenerated particle that can add polyester waste material, reduce production costs, and can effectively improve the polyester film of product performance.
Another goal of the invention of the present invention is to provide a kind of shortening technique for producing raw material route, and can reduce the polyester film manufacture method of environmental pollution.
For realizing purpose of the present invention, a kind of polyester film, comprise viscosity at the super bright PET chips raw material more than 0.62, also include in described the processing raw material viscosity in the regenerated particle of the polyester waste material more than 0.58 and viscosity at the silicon oxide polyester slice more than 0.62.
For realizing another goal of the invention of the present invention, a kind of manufacture method of polyester film, regenerated particle, silicon oxide polyester slice, the super bright PET chips of a terephthalic acid (IPA) and the calcium acetate polyester slice of super bright PET chips, polyester waste material are mixed by a certain percentage, through super-dry, extrude, filter, metering, casting film, longitudinal stretching, cross directional stretch, heat setting type and separating and cutting process make.
Advantage of the present invention is: 1, can effectively reduce production cost of products; 2, can effectively improve the performance of product, its dielectric strength DC and AC can improve about 10% respectively, and can effectively improve the stability under hot conditions; 3, the production route of raw material is short, and can prevent the environmental pollution in the production process.4, product performance of the present invention are stable.
Embodiment
Below the present invention is described in further detail.
One, raw material is synthetic
The raw material that the present invention is used to produce polyester film includes: the regenerated particle of polyester waste material, super bright PET chips, the super bright PET chips of a terephthalic acid (IPA), silicon oxide polyester slice, calcium acetate polyester slice.
1, the production of the regenerated particle of polyester waste material
The polyester waste material that the present invention selects for use mainly comprises limit film, useless film and sheet etc., when adopting stretch processes to produce polyester film, generally can produce about 2050% useless film and limit film.Choose clean inclusion-free, viscosity at the polyester film waste material more than 0.615, with the merry-go-round type bunker drying of already pulverised polyester waste material by heating, temperature is about 170 ℃, through having the vented extruder fusion that vacuumizes with strainer, moisture content and low molecule are extracted out, filter to remove impurity, Cast Strip, cooling, drying, pelletizing are standby under 275 ℃ of conditions.It is more than 0.58, preferably to be controlled at more than 0.59 that the regenerated particle viscosity of the polyester waste material that makes should be controlled at least.
2, the production of super bright PET chips
Adopt conventional pure terephthalic acid (hereinafter to be referred as PTA) and ethylene glycol (hereinafter to be referred as EG) to make with direct synthesis technique (hereinafter to be referred as the PTA method) is synthetic.Adopt Antimony Triacetate to make catalyzer.Super the light section is arranged is the main raw material of polyester film for capacitors, and its viscosity should be controlled at more than 0.62 at least, preferably is controlled at more than 0.64.
3, the production of the super bright PET chips of a terephthalic acid (IPA)
Synthetic identical with the super bright PET chips of routine, different is to add a spot of terephthalic acid (hereinafter to be referred as IPA) in the raw material on request.The mol ratio of PTA and IPA is generally 1 than between the 0.013-0.02, is preferably in 1 than between the 0.015-0.017, adds the Tripyrophosphoric acid used as stabilizers simultaneously, is used to improve the performance of the finished product.Make the film softness, embrittlement not, its viscosity should be controlled at more than 0.62 at least, preferably is controlled at more than 0.645.
4, the production of silicon oxide polyester slice
Silicon oxide is made by chemical synthesis, its specification of quality:
Content: greater than 99%
Average particle diameter: 1.8 μ
Specific surface area: 600M
2/ G
Porosity: 1.4-1.8ML/G
The silicon oxide diameter that is used to add is generally best in 1.0-3.0 μ effect.If the diameter of silicon oxide, is then made the surfaceness deficiency of film less than 0.3 μ, be unfavorable for the production and the processing of later process.If diameter greater than 3 μ, causes easily in film-forming process that then particle comes off, cause the insulativity of film to descend.
The production technique of silicon oxide polyester slice: the EG in ethylene glycol (EG) header tank is quantitatively added the preparation still, turn on agitator stirs, make slow silicon oxide additive input preparation still under the round-robin situation at colloidal mill with special use, it is dispersed in forms slurries among the EG, it is stand-by that the slurries of finishing preparation are pressed into the finished product jar;
EG quantitatively squeezes into elevated dosing vessel by pump and puts into the making beating still again, under stirring state, PTA is slowly dropped into the making beating still through feeder, stirs, and PTA is dispersed in forms slurries among the EG;
With finely dispersed PTA slurries, progressively add with constant speed by the toothed gear pump of variable frequency adjustment device control and to carry out esterification in the esterifying kettle that leaves a certain amount of mother liquor, generate ethylene glycol terephthalate (being called for short BHET).Reacted 3-4 hour, and controlled gentle dephlegmator top temperature in certain esterification, water is discharged through dephlegmator.
Slurries advance complete, add stablizer, polycondensation catalyst to esterifying kettle, when the water quantities received, be that esterification finishes during the Nei Wenda processing requirement, quantitatively add esterifying kettle with the specialist additive slurries by processing requirement this moment, produces the section of 500-9800PPM different concns by accommodometer measuring tank overflow liquid level.After finishing, the slurries interpolation, uses nitrogen pressure after fully disperseing through certain hour.Half material in the esterifying kettle is carried out polycondensation to polycondensation vessel.
Esterification products is put into polycondensation vessel and is stirred, heats, and starts rough vacuum reaction sequence of control during still Nei Wenda preset value, and below high vacuum overbottom pressure 30Pa, polycondensation generates PET specialist additive melt about 3 hours, emits EG, and EG reclaims use.After the whole temperature of polycondensation, agitator motor power reach preset value, remove vacuum and melt is gone out pelletizing from the still base pressure with nitrogen.The viscosity of the silicon oxide polyester slice that makes generally should be controlled at more than 0.62.
5, the production of calcium acetate polyester slice
Identical with the production of above-mentioned silicon oxide polyester slice, different is that silicon oxide is replaced with calcium acetate.The mean diameter of calcium acetate particle should be controlled in the 1.5-3 μ, and its viscosity should be controlled at more than 0.62 at least.Require the fragmentation of calcium acetate particle process, mill, screen, mean diameter is controlled in the 1.5-3 μ.If diameter is excessive, greater than 5 μ, rupture of membranes easily in film-forming process then, proof voltage is also low; If particle dia is too small, less than 0.5 μ, then to improving capacitor films electrical property poor effect.
Two, the production method of polyester film for capacitors
Choose the regenerated particle of calcium acetate polyester slice, silicon oxide polyester slice, the super bright PET chips of a terephthalic acid (IPA), super bright PET chips and polyester waste material as required and mix by a certain percentage, through super-dry, extrude, filter, metering, casting film, longitudinal stretching, cross directional stretch, heat setting type, cut, operation such as packaging final prod makes polyester film.
Kind, structure, diameter and the addition of interpolation particles such as the content of the quality of the regenerated particle of polyester waste material and content, the super bright PET chips of a terephthalic acid (IPA) and calcium acetate, silicon oxide are key problem in technology, and processing parameters such as suitable stretch ratio, draft temperature, heat setting temperature are key problem in technology.
Embodiment 1
1), selecting limiting viscosity is 20 parts of the regenerated particle of the polyester waste material more than 0.595; Adopt synthetic contain IPA1.7% super of conventional PTA method that 1.5 parts of light sections are arranged; 55.5 parts of the super bright PET chips of no any additives, its limiting viscosity is more than 0.62; Contain silica concentration and be 15 parts of the polyester slice master batches of 3200PPM; 8 parts of polyester slices that contain calcium acetate 90PPM.
2), above-mentioned five kinds of sections are mixed, 190 ℃ of crystallizations, 160 ℃ dry 3 hours down, the section water content melt extrudes under 285 ℃ during less than 30PPM, casts sheet in 25 ℃ chilling roller.
3), under 82 ℃ draft temperatures and 3.35 stretching ratios, carry out longitudinal stretching, and 35 ℃ of following cooling process.
4), under the stretching ratio of 102 ℃ draft temperature and 3.65, carry out cross directional stretch.
5), 238 ℃ of following heat setting types, obtain the film that thickness is 7.5 μ.Performance sees the following form 1
| Index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| Direct current dielectric strength V/ μ | 695 | 620 | 630 | 621 | 688 | 420 | 698 | 693 | 689 |
| Exchange dielectric strength V/ μ | 360 | 320 | 345 | 326 | 365 | 210 | 370 | 377 | 375 |
| Dielectric loss angle tangent % | 0.28 | 0.42 | 0.29 | 0.46 | 0.27 | 0.58 | 0.28 | 0.27 | 0.29 |
| Surface resistivity Ω | 1.5× 10 16 | 1.2× 10 15 | 6.5× 10 15 | 1.7× 10 14 | 2.3× 10 16 | 1.3× 10 14 | 1.2× 10 16 | 2.3× 10 16 | 1.4× 10 16 |
| Volume specific resistance Ω M | 2.4× 10 16 | 2.1× 10 15 | 7.9× 10 15 | 1.3× 10 15 | 6×10 16 | 1.6× 10 15 | 1.8× 10 16 | 9.6× 10 16 | 1.9× 10 16 |
| 105 ℃ of proof voltage weather resistance during high temperature | Fine | Relatively poor | Better | Generally | Well | Relatively poor | Well | Well | Well |
| Elongation at break %MD/TD | 120/117 | 95/97 | 101/102 | 120/117 | 105/107 | 95/91 | 107/112 | 115/109 | 117/108 |
| Percent thermal shrinkage %MD/TD | 1.4/0.1 | 0.7/0.0 | 0.9/0.2 | 1.8/0.4 | 1.5/0.2 | 2.1/0.4 | 1.2/0.1 | 1.7/0.2 | 1.5/0.3 |
| Tensile strength MpaMD/TD | 230/226 | 215/223 | 210/198 | 213/199 | 216/217 | 217/197 | 260/230 | 245/227 | 250/225 |
| The later process workability | Fine | Generally | Relatively poor | Well | Well | Relatively poor | Well | Well | Well |
| Roughness μ Ra | 0.08 | 0.07 | 0.085 | 0.09 | 0.087 | 0.045 | 0.093 | 0.089 | 0.082 |
6), to obtain tensile strength be 230/226Mpa, elongation at break is 120/117%, dielectric strength is DC 695V/ μ, AC 350V/ μ, dielectric loss angle tangent are 0.29% high-quality thin film.Not only production cost is low, and every performance meets or exceeds the existing literature report.After the capacitor films that is made by this method manufactures electrical condenser, can under 105 ℃ comparatively high temps, normally use for a long time.
Embodiment 2
Get 30 parts of silicon oxide polyester slices; 20 parts of the regenerated particle of polyester waste material; 50 parts of super bright PET chips; Press the way system film of embodiment 1, its performance of film that obtains thickness 10 μ sees Table 1
Proof voltage weather resistance variation when the capacitor films that is made by this method manufactures behind the electrical condenser high temperature, but in the time of 85 ℃, can normally use, dielectric loss angle tangent % is higher, and its outstanding advantage is that cost is lower.
Embodiment 3
Get 22 parts of silicon oxide polyester slices; Get 8 parts of calcium acetate polyester slices; Get 20 parts of the regenerated particle of polyester waste material; Get 50 parts of super bright PET chips; Press the way system film of embodiment 1, its performance of film that obtains thickness 6 μ sees Table 1
As seen add calcium acetate when making insulation, dielectric loss angle tangent, high temperature 105 ℃ of performances such as proof voltage weather resistance improve.
Embodiment 4
Get 20 parts of silicon oxide polyester slices; Get 3 parts of the super bright PET chips of IPA; Get 30 parts of the regenerated particle of polyester waste material; Get 47 parts of super bright PET chips; Press the way system film of embodiment 1, its performance of film that obtains thickness 5.5 μ sees Table 1
After adding the super bright PET chips of IPA, the later process workability improves, because add the regenerated particle of polyester waste material film is become fragile, but make degradation such as percent thermal shrinkage, dielectric loss angle tangent, dielectric strength, insulation, therefore, control addition.
Embodiment 5
Get 25 parts of silicon oxide polyester slices; Get 12 parts of calcium acetate polyester slices; Get 25 parts of the regenerated particle of polyester waste material; Get 36 parts of super bright PET chips; Get 2 parts of the super bright PET chips of IPA; Press the way system film of embodiment 1, its performance of film that obtains thickness 8 μ sees Table 1.Its excellent property.
Comparative example 1
Get 8 parts of silicon oxide polyester slices; Get 62 parts of super bright PET chips; Get 30 parts of the regenerated particle of polyester waste material; Press the way system film of embodiment 1, its performance of film that obtains thickness 12 μ sees Table 1.The electrical property extreme difference can not use as capacitor films.
The production method embodiment of polyester film for capacitors
Embodiment 6
1) gets 30 parts of silicon oxide polyester slices; Get 12 parts of calcium acetate polyester slices; Get 15 parts of the regenerated particle of polyester waste material; Get 40 parts of super bright PET chips; Get 3 parts of the super bright PET chips of IPA;
2) these sections are mixed under mechanical stirring, 175 ℃ of crystallizations 30 minutes, 160 ℃ of dryings four hours;
3) under 285 ℃, the novel forcing machine of two screw thread exhaust barrier types, extrude, by aperture is the disc-type prefilter of 40 μ and the main strainer of 15 μ, under 280 ℃ hanger-style die, melt flows into the chilling roller, is cooled to the uniform sheet of thickness under 25 ℃ fast;
4) for making melt evenly closely attach the chilling roller, need to increase a cover electrostatic adhesion system.The present invention adopts removable steel band electrostatic adhesion system, electrostatic adhesion voltage 6.276KV, electrostatic adhesion system power 2.6MA;
5) by 8 roller preheatings, be warming up to 106 ℃, under Infrared Heating, carry out stretch ratio and be twice longitudinal stretching of 1.6 and 2.7, after be cooled to 40 ℃ and prevent crystallization;
6) film is sent in the baking oven that both sides have pincers to clamp and be preheated to 105 ℃, carry out horizontal 3.85 multiplying powers and stretch;
7) 230 ℃ of following thermal treatments 5 seconds;
8) obtain the film of thickness 6 μ, performance sees Table 1.
Embodiment 7
Changing twice longitudinal stretching ratio is 1.3 and 2.7, and temperature is 108 ℃, the cross directional stretch ratio be 3.65 other conditions with embodiment 6, obtain the film of thickness 6 μ, performance sees Table 1.
Embodiment 8
Changing twice longitudinal stretching ratio is 1.45 and 2.6, and the longitudinal stretching temperature is 101 ℃; The cross directional stretch ratio is 3.85, and the cross directional stretch temperature is 110 ℃, after cross directional stretch is finished 245 ℃ of following thermal treatments 4 seconds; Other conditions obtain the film of thickness 5.5 μ with embodiment 6, and performance sees Table 1.
As seen from table, embodiment 8 is respond well.
In United States Patent (USP) 5595819, owing to adopt the additive that contains cubic calcium carbonate, lime carbonate is weakly alkaline, easily forms the calcium salt aggregated particle with acid when direct synthesis technique, therefore, must adopt ester-interchange method could produce this raw material.
The present invention adopts direct synthesis technique production to contain the additive of IPA, silicon particle, calcium acetate, though calcium acetate also is weakly alkaline, its alkalescence is much lower than lime carbonate, near neutral, is difficult for forming the calcium salt aggregated particle with acid when direct synthesis technique.Thereby raw materials cost of the present invention is low, and production process route is short, does not use deleterious methyl alcohol to make raw material.
In the present invention:
1) the present invention's section of adding IPA can increase the flexibility of film, but the many shrinking percentages that can make of amount improve, and high temperature durability descends, and addition should not surpass 5%.
2) after the regenerated particle of polyester waste material adds,, can make the film embrittlement, index variation such as intensity, shrinking percentage though can reduce cost significantly.The regenerated particle addition of polyester waste material should not surpass 50%.Otherwise produce instability, proof voltage, dielectric loss angle tangent index variation.
3) section of adding the silicon particle can improve proof voltage, reduce dielectric loss angle tangent, improve the workability of later process simultaneously, but it is best to surpass 50%, 12～40% effect.
4) silicon particle and calcium particle acting in conjunction improve the proof voltage of product, high temperature resistant, insulating property and processing characteristics.But the section that contains the calcium acetate particle surpasses at 25% o'clock, the easy rupture of membranes of production process.Ratio is 5 ~ 17% preferably.
Main raw materials in proportion scope of the present invention sees Table 2:
Table 2
| Sequence number | Title (unit) | Index |
| 1 | The regenerated particle of polyester waste material (%) | 10-50 |
| 2 | Contain the section (%) of IPA | 0-5 |
| 3 | IPA is concentration (%) in section | 1.3-2 |
| 4 | Contain SiO 2Section (%) | 12-40 |
| 5 | Silicon oxide is concentration (PPM) in section | 1000-9800 |
| 6 | Contain the section (%) of calcium acetate | 0-25 |
| 7 | Calcium acetate is concentration (PPM) in section | 40-90 |
| 8 | Surpass light section (%) is arranged | 20-68 |
The scope of main technologic parameters of the present invention sees Table 3: table 3
| Sequence number | Title | Index |
| 1 | Extrusion temperature (℃) | 270-310 |
| 2 | The longitudinal stretching temperature (℃) | 70-150 |
| 3 | Longitudinal stretching is than (doubly) | 2.5-6 |
| 4 | The cross directional stretch temperature (℃) | 80-155 |
| 5 | Cross directional stretch is than (doubly) | 2.6-5.5 |
| 6 | Heat setting temperature (℃) | 180-255 |
| 7 | Electrostatic adhesion system voltage (KV) | 3.6-15 |
| 8 | Electrostatic adhesion system power (MA) | 1.0-6.2 |
The present invention mainly accords with the illustrated in table 4 of Xiao
Table 4
| Sequence number | Symbol | Explanation |
| 1 | PTA | The pure terephthalic acid |
| 2 | IPA | Between terephthalic acid |
| 3 | EG | Ethylene glycol |
| 4 | DC | Direct current |
| 5 | AC | Alternating-current |
| 6 | MD | Vertically |
| 7 | TD | Laterally |
| 8 | The DMT method | Ester-interchange method |
| 9 | The PTA method | Direct synthesis technique |
| 10 | PET | Polyethylene terephthalate (polyester) |
Product of the present invention can be widely used in electric insulation film, digital recording materials etc. such as capacitor films; Can produce the product of 4.5 μ to 58 μ all sizes.
Claims (3)
1. polyester film, comprise that viscosity is at the super bright PET chips raw material more than 0.62, it is characterized in that: also include viscosity in described the processing raw material in the polyester waste material regenerated particle more than 0.58, viscosity is at the silicon oxide polyester slice more than 0.62, viscosity super bright PET chips of terephthalic acid (IPA) between more than 0.62, with viscosity at the calcium acetate polyester slice more than 0.62, the per-cent that above-mentioned each raw material weight accounts for the raw material gross weight is: super bright PET chips accounts for 20-68%, the polyester waste material regenerated particle accounts for 10-50%, the silicon oxide polyester slice accounts for 12-40%, the concentration of silicon oxide in the silicon oxide polyester slice is 1000-9800PPM, between the occupancy volume of the super bright PET chips of terephthalic acid (IPA) greater than 0, less than 5%, between the concentration of terephthalic acid (IPA) in the super bright PET chips of a terephthalic acid (IPA) be 1.3-2%, the occupancy volume of calcium acetate polyester slice is greater than 0, less than 25%, the concentration of calcium acetate in the calcium acetate polyester slice is 40-90PPM.
2. the manufacture method of a kind of polyester film according to claim 1, it is characterized in that: will surpass bright PET chips, polyester waste material regenerated particle, silicon oxide polyester slice, the super bright PET chips of a terephthalic acid (IPA) and calcium acetate polyester slice and mix by a certain percentage, through super-dry, extrude, filter, metering, casting film, longitudinal stretching, cross directional stretch, heat setting type and separating and cutting process make.
3. the manufacture method of a kind of polyester film according to claim 2, it is characterized in that: described extrusion temperature is a 270-310 degree Celsius, the longitudinal stretching temperature is a 70-150 degree Celsius, longitudinal stretching is than being 2.5-6, the cross directional stretch temperature is a 80-155 degree Celsius, cross directional stretch is than being 2.6-5.5, and heat setting temperature is a 180-255 degree Celsius.
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| CNB021385955A CN100387643C (en) | 2002-11-14 | 2002-11-14 | Polyester film and producing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101260196B (en) * | 2008-04-07 | 2011-03-23 | 常州绝缘材料总厂有限公司 | White polyester solar energy battery back film and preparation method thereof |
| CN102152584B (en) * | 2010-12-16 | 2013-09-25 | 浙江强盟实业股份有限公司 | Nano fluorescent invisible anti-counterfeit polyester film with high permeability and preparation method thereof |
| CN105176011A (en) * | 2014-06-17 | 2015-12-23 | 上海紫东薄膜材料股份有限公司 | Method for making polyester film for ultrathin aluminum plating compounding |
| CN105315627A (en) * | 2014-06-30 | 2016-02-10 | 上海紫东薄膜材料股份有限公司 | Ultrathin polyester thin film used for gold and silver wires and production method thereof |
| CN107141734B (en) * | 2017-06-27 | 2019-03-19 | 仪化东丽聚酯薄膜有限公司 | A kind of fabric cold-transfer printing dumb light polyester film and its preparation method and application |
| CN107474497A (en) * | 2017-07-31 | 2017-12-15 | 安徽铜爱电子材料有限公司 | Low electrostatic heat transfer printing carbon tape biaxially oriented polyester film and preparation method thereof |
| CN107474496B (en) * | 2017-07-31 | 2020-08-04 | 安徽铜爱电子材料有限公司 | Biaxially oriented polyester film with stable electrical property and preparation method thereof |
| KR102240877B1 (en) * | 2018-04-30 | 2021-04-19 | 에스케이씨 주식회사 | Method for reproducing polyester container and reproduced polyester chip prepared therefrom |
| DE102020123772B4 (en) * | 2020-09-11 | 2022-08-25 | Rittec Umwelttechnik Gmbh | Process for preparing a terephthalic acid mixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0484956A2 (en) * | 1990-11-08 | 1992-05-13 | Diafoil Hoechst Co., Ltd | Polyester film capacitor element |
| EP0545227A2 (en) * | 1991-11-29 | 1993-06-09 | Diafoil Hoechst Co., Ltd | Metallized polyester film capacitor |
| EP0602583A2 (en) * | 1992-12-15 | 1994-06-22 | Diafoil Hoechst Co., Ltd | Metallized polyester film capacitor |
-
2002
- 2002-11-14 CN CNB021385955A patent/CN100387643C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0484956A2 (en) * | 1990-11-08 | 1992-05-13 | Diafoil Hoechst Co., Ltd | Polyester film capacitor element |
| EP0545227A2 (en) * | 1991-11-29 | 1993-06-09 | Diafoil Hoechst Co., Ltd | Metallized polyester film capacitor |
| EP0602583A2 (en) * | 1992-12-15 | 1994-06-22 | Diafoil Hoechst Co., Ltd | Metallized polyester film capacitor |
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| CN1500822A (en) | 2004-06-02 |
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