CN105058939A - Environment-friendly polyester film and preparation method thereof - Google Patents
Environment-friendly polyester film and preparation method thereof Download PDFInfo
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- CN105058939A CN105058939A CN201510432332.1A CN201510432332A CN105058939A CN 105058939 A CN105058939 A CN 105058939A CN 201510432332 A CN201510432332 A CN 201510432332A CN 105058939 A CN105058939 A CN 105058939A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
Abstract
The invention relates to an environment-friendly polyester film and a preparation method thereof. The environment-friendly polyester film provided by the invention comprises an A1BA2 three-layer structure, wherein the A1 layer is an anti-adhesive layer, and the materials comprise PET anti-adhesive agent master batch slices and PET super-bright polyester slices; the B layer is a middle sandwich layer, and the materials comprise PET super-bright polyester slices; and the A2 layer is an anti-adhesive layer, and the materials comprise PET anti-adhesive agent master batch slices and PET super-bright polyester slices. The environment-friendly polyester film prepared by the invention is light in weight, attractive in appearance, easily formed, stable in chemical property and low in production cost, resources are saved, and the environment-friendly polyester film is easily recycled after being used and easily degraded by the environment.
Description
Technical field
The present invention relates to a kind of environment-friendly type polyester film and preparation method thereof, belong to Material Field.
Background technology
Polyester film is owing to having good mechanical property, and hot property and chemical inertness, be widely used in every field.In existing production method, polyester film is after painting process, polyester film is not subject to tension force and controls, the instability easily causing polyester film to run, causes film to occur sideslip, de-to be coated with, blows that flower, scuffing and adhesion etc. are a series of affects the quality of coating product and the problem of yield rate.How to improve film path operation stability, ensure the surface quality of polyester film, become problem demanding prompt solution.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of environment-friendly type polyester film and preparation method thereof, environment-friendly type polyester film prepared by the present invention, and quality is light, attractive in appearance, easy-formation, stable chemical nature, production cost is low, economize on resources, with rear easy recovery, easily by environment degradable.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of environment-friendly type polyester film, comprises A
1bA
2three-decker, described A
1layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, and described B layer is intermediate core layer, and material is that PET surpasses bright PET chips, described A
2layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described A
1layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35%-65% and 35%-65%PET surpass bright PET chips.
Further, described A
2layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35%-65% and 35%-65%PET surpass bright PET chips.
Further, described PET antitackiness agent masterbatch section is for cutting into slices containing silicon dioxide polyester, and silica particle diameter is 2 ~ 3um, and content is 400-900ppm.
Adopt the beneficial effect of this step to be Production and Packaging BOPET film of the present invention, select super bright PET chips as raw material, but pure use surpasses bright PET chips, obtained film can cause because of surface tack cannot rolling, therefore add antitackiness agent, i.e. masterbatch section, cuts into slices also referred to as additive.
Further, described B layer thickness accounts for 70%-80%, A
1layer thickness accounts for 10%-20%, A
2layer thickness accounts for 10%-20%.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of environment-friendly type polyester film, comprising:
1) A is got
1layer PET antitackiness agent masterbatch is cut into slices and PET surpasses bright PET chips, B layer PET surpasses bright PET chips and A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips, above-mentioned raw materials are sent into drier drying process;
2) raw material after drying process is entered melt extruder and measuring pump, 240 ~ 280 DEG C of squeezing out quantitative meltings, melt filters out impurities, and the melt after filtration, after die head, is cooled by chill roll, forms film sheet;
3) by 2) obtained film sheet sends into vertical machine drawing group (MDO) longitudinal stretching;
4) by 3) longitudinal stretching complete after film sheet send into transverse stretching machine group (TDO) cross directional stretch, crystallization treatment of shaping after cross directional stretch, less than 35 DEG C coolings, obtain film;
5) calibrator is utilized to 4) transverse gage of film that obtains controls;
6) due in cross directional stretch process, film near chain pincers place can not be stretched sufficiently, form comparatively thick film herein, therefore this part rim charge to be cut away, film is through trimming process, the rim charge scaled off delivers to recovery comminutor after pulverizing, carry out granulation, utilized by secondary recovery, trimming rear film by high-voltage arc by film surface hacking, electrion produces ozone simultaneously, polar group is formed at film surface, improve the surface tension of film, it is made more to adapt to aluminize or typography, finally utilize winder rolling, film dividing after rolling becomes the rouleau of different in width specification, obtain environment-friendly type polyester film.
On the basis of technique scheme, the present invention can also do following improvement.
Further, 1) in, after described drying, the moisture of raw material is less than 50ppm.
The beneficial effect of this step is adopted to be owing to containing ester group in PET molecular structure, very responsive to moisture, at high temperature very easily there is hydrolysis, make molecular weight and molecular weight.Meanwhile, in process, the existence of moisture will cause bubble to produce.So the present invention carries out drying process to raw material.
Further, 2) in, described A
1the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, and B layer PET surpasses bright PET chips and send into main extruder---single screw extrusion machine, A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder;
Further, 2) in, described A
1layer subsidiary extruder, B layer main extruder, A
2layer subsidiary extruder raw material extrudes mass ratio for (10-20): (60-80): (10-20).
Further, 2) in, between melt and chill roll, apply an external electric field, take wire electrode as negative pole, slab roller is positive pole (earth polar).
The beneficial effect of this step is adopted to be that melt and film sheet are attached on chill roll better, film sheet is placed in this high-voltage electrostatic field, the both sides electric charge that polarization is contrary because of electrostatic induction (on just lower negative), so wire electrode and slab roller all can produce attraction to it.Because the distance on film sheet and slab roller surface is less than the distance with wire electrode, therefore, slab roller will much larger than the attraction of wire electrode to film to the attraction of film sheet, and film sheet is adsorbed on chill roll tightly.
Further, 3) in, when longitudinal stretching preheat temperature is 80 ~ 90 DEG C, the stretching power of unformed sheet is minimum, and draw ratio is 3.0 ~ 3.85.
The beneficial effect of this step is adopted to be because PET is linear macromolecule, respectively there is a hydroxyl at the two ends of strand, and middle each cellular chain has stupid ring to be connected with ethyl by ester group, does not have large side chain, therefore molecule good linearity, is easy to arranged in parallel along tensile fiber direction orientation.After stretched, physical strength significantly can increase along draw direction.Longitudinal stretching is the speed difference by cylinder, sheet is formed between fast roller and slow roller and stretches.
The key of longitudinal stretching technique is selection and the control of draft temperature and draw ratio.Draft temperature is higher, and film sheet is easily stretched, and the mobility aggravation of molecule segment, can destroy orientation on the contrary simultaneously; Draft temperature is on the low side, and tensile stress becomes large, and film sheet can skid at drawing point, causes the inequality that stretches, and causes thickness deviation to become large.
Further, 4) in, described cross directional stretch preheat temperature is 80-110 DEG C.
Adopting the beneficial effect of this step to be present inventor for the selection of cross directional stretch preheat temperature is the creative gained combining quantity of parameters, because transverse stretching machine group comprises baking oven, chain, chain pincers, chain rail, heating and cooling system, lubricating system and external ventilation system.Air after heating is delivered to different process sections by blower fan by baking oven, forms static pressure wind field, reaches temperature required according to the setting of technique.The film sheet indulged after drawing is delivered in the chain pincers of rotation, is reached the object of cross directional stretch by the change of chain rail width.Because preheating, stretching, thermal finalization and cooling are all in a baking oven, so the setting of cross directional stretch technological parameter will consider the multiple situations such as the conduction of baking oven length, speed of production, hot blast and baking oven insulation.
Further, 4) in, the temperature of described sizing crystallization treatment is 150-220 DEG C.
Adopt the beneficial effect of this step be eliminate stretch in the internal stress that produces, thus obtained Heat stability is good, film that shrinkage factor is little.
Further, 5) in, the transverse gage of described calibrator on-line measurement film, by result feedback to computer, the thermal expansion bolt of computer controlled molding head makes corresponding change, reaches the object automatically controlling film transverse gage.
The invention has the beneficial effects as follows:
Environment-friendly type polyester film prepared by the present invention, quality is light, and attractive in appearance, easy-formation, stable chemical nature, production cost is low, economizes on resources, with rear easy recovery, easily by environment degradable.
Detailed description of the invention
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
A kind of environment-friendly type polyester film, comprises A
1bA
2three-decker, described A
1layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, and described B layer is intermediate core layer, and material is that PET surpasses bright PET chips, described A
2layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, wherein,
Described A
1layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35% and 65%PET surpass bright PET chips,
Described A
2layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35% and 65%PET surpass bright PET chips.
Described PET antitackiness agent masterbatch section is for cutting into slices containing silicon dioxide polyester, and silica particle diameter is 2 ~ 3um, and content is 900ppm.
Described B layer thickness accounts for 80%, A
1layer thickness accounts for 10%, A
2layer thickness accounts for 10%.
Preparation method:
1) A is got
1layer PET antitackiness agent masterbatch is cut into slices and PET surpasses bright PET chips, B layer PET surpasses bright PET chips and A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips, and above-mentioned raw materials is sent into drier drying process, after dry, the moisture of raw material is less than 50ppm;
2) raw material after drying process is entered melt extruder and measuring pump, 240 DEG C of squeezing out quantitative meltings, melt filters out impurities, and the melt after filtration, after die head, is cooled by chill roll, forms film sheet; Described A
1the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, and B layer PET surpasses bright PET chips and send into main extruder---single screw extrusion machine, A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, described A
1layer subsidiary extruder, B layer main extruder, A
2mass ratio extruded by layer subsidiary extruder raw material is 10:80:10, and between melt and chill roll, apply an external electric field, take wire electrode as negative pole, slab roller is positive pole (earth polar).
3) by 2) obtained film sheet sends into vertical machine drawing group longitudinal stretching, and longitudinal stretching preheat temperature 90 DEG C, draw ratio is 3.
4) by 3) longitudinal stretching complete after film sheet send into transverse stretching machine group cross directional stretch, after 110 DEG C of cross directional stretch, 220 DEG C of sizing crystallization treatment, less than 35 DEG C coolings, obtain film.
5) calibrator is utilized to 4) transverse gage of film that obtains controls, the thickness of calibrator on-line measurement film, by result feedback to computer, the thermal expansion bolt of computer controlled molding head makes corresponding change, reaches the object automatically controlling film transverse gage.
6) film is through trimming process, and trimming rear film by film surface hacking, finally utilizes winder rolling by high-voltage arc, and the film dividing after rolling becomes the rouleau of different in width specification, obtains environment-friendly type polyester film.
Embodiment 2
A kind of environment-friendly type polyester film, comprises A
1bA
2three-decker, described A
1layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, and described B layer is intermediate core layer, and material is that PET surpasses bright PET chips, described A
2layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, wherein,
Described A
1layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 30% and 70%PET surpass bright PET chips,
Described A
2layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 30% and 70%PET surpass bright PET chips.
Described PET antitackiness agent masterbatch section is for cutting into slices containing silicon dioxide polyester, and silica particle diameter is 2 ~ 3um, and content is 700ppm.
Described B layer thickness accounts for 70%, A
1layer thickness accounts for 15%, A
2layer thickness accounts for 15%.
Preparation method:
1) A is got
1layer PET antitackiness agent masterbatch is cut into slices and PET surpasses bright PET chips, B layer PET surpasses bright PET chips and A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips, and above-mentioned raw materials is sent into drier drying process, after dry, the moisture of raw material is less than 50ppm;
2) raw material after drying process is entered melt extruder and measuring pump, 260 DEG C of squeezing out quantitative meltings, melt filters out impurities, and the melt after filtration, after die head, is cooled by chill roll, forms film sheet; Described A
1the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, and B layer PET surpasses bright PET chips and send into main extruder---single screw extrusion machine, A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, described A
1layer subsidiary extruder, B layer main extruder, A
2mass ratio extruded by layer subsidiary extruder raw material is 15:70:15, and between melt and chill roll, apply an external electric field, take wire electrode as negative pole, slab roller is positive pole.
3) by 2) obtained film sheet sends into vertical machine drawing group longitudinal stretching, and longitudinal stretching preheat temperature 100 DEG C, draw ratio is 3.5.
4) by 3) longitudinal stretching complete after film sheet send into transverse stretching machine group cross directional stretch, after 100 DEG C of cross directional stretch, 200 DEG C of sizing crystallization treatment, less than 35 DEG C coolings, obtain film.
5) calibrator is utilized to 4) transverse gage of film that obtains controls, the thickness of calibrator on-line measurement film, by result feedback to computer, the thermal expansion bolt of computer controlled molding head makes corresponding change, reaches the object automatically controlling film transverse gage.
6) film is through trimming process, and trimming rear film by film surface hacking, finally utilizes winder rolling by high-voltage arc, and the film dividing after rolling becomes the rouleau of different in width specification, obtains environment-friendly type polyester film.
Polyester film testing result prepared by table 1 embodiment 1,2
| Grouping | Light transmittance (%) | Glossiness (%) | Hot strength (Mpa) TD | Hot strength (Mpa) MD |
| Embodiment 1 | 91 | 134 | 245 | 220 |
| Embodiment 2 | 90 | 142 | 249 | 230 |
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an environment-friendly type polyester film, is characterized in that, comprises A
1bA
2three-decker, described A
1layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET, and described B layer is intermediate core layer, and material is that PET surpasses bright PET chips, described A
2layer is anti-glutinous layer, and material comprises the section of PET antitackiness agent masterbatch and surpasses bright PET chips with PET.
2. environment-friendly type polyester film according to claim 1, is characterized in that, described A
1layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35%-65% and 35%-65%PET surpass bright PET chips,
Described A
2layer is made up of the raw material of following mass percent: the PET antitackiness agent masterbatch section of 35%-65% and 35%-65%PET surpass bright PET chips.
3. environment-friendly type polyester film according to claim 1 and 2, is characterized in that, described PET antitackiness agent masterbatch section is for cutting into slices containing silicon dioxide polyester, and silica particle diameter is 2 ~ 3um, and content is 400-900ppm.
4. environment-friendly type polyester film according to claim 3, is characterized in that, described B layer thickness accounts for 70%-80%, A
1layer thickness accounts for 10%-20%, A
2layer thickness accounts for 10%-20%.
5. a preparation method for environment-friendly type polyester film, is characterized in that, comprising:
1) A is got
1layer PET antitackiness agent masterbatch is cut into slices and PET surpasses bright PET chips, B layer PET surpasses bright PET chips and A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips, above-mentioned raw materials are sent into drier drying process;
2) raw material after drying process is entered melt extruder and measuring pump, 240 ~ 280 DEG C of squeezing out quantitative meltings, melt filters out impurities, and the melt after filtration, after die head, is cooled by chill roll, forms film sheet;
3) by 2) obtained film sheet sends into vertical machine drawing group longitudinal stretching;
4) by 3) longitudinal stretching complete after film sheet send into transverse stretching machine group cross directional stretch, crystallization treatment of shaping after cross directional stretch, less than 35 DEG C coolings, obtain film;
5) calibrator is utilized to 4) transverse gage of film that obtains controls;
6) film trimming process, then by high-voltage arc by film surface hacking, finally utilize winder rolling, the film dividing after rolling becomes the rouleau of different in width specification, obtains environment-friendly type polyester film.
6. preparation method according to claim 5, is characterized in that, 1) in, after described drying, the moisture of raw material is less than 50ppm.
7. the preparation method according to claim 5 or 6, is characterized in that, 2) in, described A
1the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder, and B layer PET surpasses bright PET chips and send into main extruder---single screw extrusion machine, A
2the masterbatch section of layer PET antitackiness agent and PET surpass bright PET chips and send into subsidiary extruder---double screw extruder; Described A
1layer subsidiary extruder, B layer main extruder, A
2layer subsidiary extruder raw material extrudes mass ratio for (10-20): (60-80): (10-20); Between melt and chill roll, apply an external electric field, take wire electrode as negative pole, slab roller is positive pole.
8. preparation method according to claim 7, is characterized in that, 3) in, longitudinal stretching preheat temperature is 80 ~ 90 DEG C, and draw ratio is 3.0 ~ 3.85.
9. preparation method according to claim 8, is characterized in that, 4) in, described cross directional stretch preheat temperature is 80-110 DEG C, and the temperature of described sizing crystallization treatment is 150-220 DEG C.
10. preparation method according to claim 9, is characterized in that, 5) in, the transverse gage of described calibrator on-line measurement film, by result feedback to computer, the thermal expansion bolt of computer controlled molding head makes corresponding change, reaches the object automatically controlling film transverse gage.
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| CN201510432332.1A CN105058939A (en) | 2015-07-21 | 2015-07-21 | Environment-friendly polyester film and preparation method thereof |
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| CN105729966A (en) * | 2016-03-01 | 2016-07-06 | 山东丰华塑胶科技有限公司 | High-elongation biaxially oriented polyester film and preparation method thereof |
| CN107610585A (en) * | 2017-09-18 | 2018-01-19 | 江苏景宏新材料科技有限公司 | A kind of preparation for washing transparent thermal contraction type beer bottle label and its wash mark technique |
| CN110254018A (en) * | 2019-05-16 | 2019-09-20 | 浙江和顺新材料有限公司 | A kind of color double-face anti-static polyester film and preparation method thereof |
| CN110696454A (en) * | 2019-03-08 | 2020-01-17 | 河南银金达新材料股份有限公司 | High-elongation polyester modified alloy film for waterproof coiled material and preparation method thereof |
| CN110696504A (en) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107610585A (en) * | 2017-09-18 | 2018-01-19 | 江苏景宏新材料科技有限公司 | A kind of preparation for washing transparent thermal contraction type beer bottle label and its wash mark technique |
| CN107610585B (en) * | 2017-09-18 | 2021-04-20 | 江苏景宏新材料科技有限公司 | Preparation of washable transparent heat-shrinkable beer bottle label and label washing process thereof |
| CN110696454A (en) * | 2019-03-08 | 2020-01-17 | 河南银金达新材料股份有限公司 | High-elongation polyester modified alloy film for waterproof coiled material and preparation method thereof |
| CN110254018A (en) * | 2019-05-16 | 2019-09-20 | 浙江和顺新材料有限公司 | A kind of color double-face anti-static polyester film and preparation method thereof |
| CN110696504A (en) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof |
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Application publication date: 20151118 |