CN101259771A - Single-face matt polyester film and preparation method thereof - Google Patents
Single-face matt polyester film and preparation method thereof Download PDFInfo
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- CN101259771A CN101259771A CNA2008100152738A CN200810015273A CN101259771A CN 101259771 A CN101259771 A CN 101259771A CN A2008100152738 A CNA2008100152738 A CN A2008100152738A CN 200810015273 A CN200810015273 A CN 200810015273A CN 101259771 A CN101259771 A CN 101259771A
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Abstract
The invention discloses a single-side matt polyester film with a layered structure comprising at least a first film layer and a second film layer which are co-extruded, compounded with each other and arranged next to each other; the first film layer is arranged on the surface layer of the polyester film and is a matt layer, which contains 50 to 80 wt percent of the polyester, 20 to 50 wt percent of nylon polymer and 0 to 0.5 wt percent of crystal nucleating promoter; the second film layer is a highly transparent layer, the main component of which is the polyester. The invention also discloses a method for manufacturing the single-side matt polyester film. As the method does not require the aforehand special preparation of the matt master batch, the whole process is simple. The manufactured polyester film not only has favorable matt effect, but also has excellent transmittance and is in particular applicable to the use for printing, aluminum plating and compounding in the field of packaging.
Description
Technical field
The present invention relates to the polyester film technical field, particularly a kind of single-face matt polyester film the invention still further relates to the manufacture method of this polyester film.
Background technology
Packing and the used polyester film of industrial circle all are high brightness usually, matt polyester film is owing to have the special-effect of surperficial frosted, when using, can make packed article produce dim artistic effect, increase the attraction of packed article on shelf as packaging material.
Matt polyester film is divided into single-face matt and two-sided inferior light from surface structure.Two-sided inferior light film is generally used for gold stamping and the transfer field because mist degree is big; Single-face matt only has a matt layer, and transparency is good, except can being used for gold stamping and transfer field, being more suitable for being used for printing, aluminizing and field of compounding.Single-face matt polyester film can show the effect of aluminium foil after aluminizing, decoration function is very good.
Matt polyester film mainly contains three kinds of methods from preparation technology.A kind of is the mode that adopts face coat, produces matt effect, and the inferior light film of this technology preparation has good inferior luminosity and light transmittance, but complex process, production cost height.Second method is to adopt multi-layer co-extruded technology, in the top layer, add inorganic or organic inert particle and produce matt effect, as silica, calcium carbonate, talcum powder, crosslinked polystyrene microsphere, trial of strength polyacrylic resin microballoon etc., the matt polyester film of this technology preparation needs special inferior light masterbatch, increased the complexity of technology, and film mist degree height, light transmittance is low, inferior luminosity is lower, has limited its application in industries such as printing, aluminize.The third method also is to prepare by co-extrusion technology, add two or more high polymers on the top layer, produce matt effect by the phase separation between the high polymer, selected high polymer is PP, PE, PS etc. normally, the common mist degree of the polyester film of making by this method is higher, matt effect is relatively poor, has limited its application.
Summary of the invention
First technical problem to be solved by this invention is: a kind of single-face matt polyester film is provided, and this polyester film not only light transmittance height but also matt effect is good.
As with a kind of design, second technical problem to be solved by this invention is: a kind of method of making single-face matt polyester film is provided, and this method can go out light transmittance height and the good polyester film of matt effect by simple explained hereafter.
For solving above-mentioned first technical problem, technical scheme of the present invention is:
Single-face matt polyester film, has layer structure, at least first rete and second rete that comprise coextru-lamination and adjacent setting in this layer structure, described first rete is positioned at the top layer of this polyester film, described first rete is a matt layer, contain the polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt% in the described matt layer, described second rete is high hyaline layer, and its Main Ingredients and Appearance is a polyester.
Wherein, the thickness of described matt layer accounts for 10～30% of overall film thickness.
Wherein, the polyester of described matt layer is one or more the mixture in polybutylene terephthalate (PBT), PTT and the PETG; The nylon high polymer of described matt layer is one or more the blend among PA6, PA66, PA1010, PA11 and the PA12; The crystallization nucleation auxiliary agent of described matt layer is contract one or more a mixture in the dimethylbenzene of Sodium Benzoate, sodium chloride, terephthalate carboxylic acid sodium, substituted aryl phosphate ester salt and sorbierite.
For solving above-mentioned second technical problem, technical scheme of the present invention is:
Make the method for single-face matt polyester film, comprise the steps
1) polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt% are mixed in blending bunker, enter in the matt layer extruder, be heated into melt;
2) with after polyester slice pre-crystallization of process and dry the processing, enter in the high hyaline layer extruder, be heated into melt;
3) after the melt of being extruded by above-mentioned steps passed through co-extrusion die head, in the moulding of sharp cooling roll direct casting sheet, the sharp cooling roll temperature was set at 25～50 ℃, and the extrusion capacity of matt layer extruder is 1/9～3/7 of a high hyaline layer extruder;
4) stretch: wherein, the temperature of longitudinal stretching is 80～100 ℃, and the longitudinal stretching ratio is 2.5～3.0 times; The temperature of cross directional stretch is 100～130 ℃, and draw ratio is 3.0～3.5 times;
5) thermal finalization: wherein, setting temperature is 180～240 ℃, and shaping time is 1～20 second;
6) rolling is handled.
Wherein, after the thermal finalization step, before the rolling treatment step, the non-dull surface of single-face matt polyester film is carried out surface treatment.
Wherein, described surface treatment is that sided corona treatment or online coating are handled.
Wherein, described matt layer extruder is a double screw extruder, and described high hyaline layer extruder is a single screw extrusion machine.
After having adopted technique scheme, the invention has the beneficial effects as follows: owing to contain the polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt% in the described matt layer, with the Main Ingredients and Appearance of the high hyaline layer of matt layer coextru-lamination also be polyester, matt layer is similar to high hyaline layer Main Ingredients and Appearance, make it can not form tangible phase-splitting between two-layer, and can also guarantee good bonding force.In view of nylon is the crystal polymer thing, its crystallization rate is very fast, generally present translucent or transparent milky, has matt effect, that is to say, the matt effect of disclosed polyester film is to realize by the matt layer each component especially crystallization of nylon high polymer, owing to do not have tangible phase-splitting between matt layer and the high hyaline layer, thereby reduced the reflection of light at minute boundary, improved the light transmittance of whole film, and the minimizing of reflection ray, the also corresponding glossiness that reduced has improved matt effect.In addition, mainly by the characteristic decision of nylon high polymer itself, it can regulate by the crystallization rate of control matt layer the mist degree of disclosed polyester film, is convenient to control, compare with the polyester film that divides facies principle to make by polymer, mist degree reduces greatly.Among the present invention, when the thickness of matt layer be less than overall film thickness 10% the time, then matt effect is not obvious, matt layer surpasses 30% o'clock of overall film thickness, then light transmittance reduces, and is little to the raising influence of inferior luminosity simultaneously.In sum, disclosed polyester film can guarantee that film has good matt effect, can guarantee superior light transmittance again, be specially adapted to packaging field printing, aluminize, compound use.
In disclosed method, because the raw material of matt layer contains the polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt%, it reaches the effect that improves matt effect and light transmittance by the crystallization and the micron-scale phase separation of each component, do not need to prepare in advance special inferior light masterbatch, thereby whole flow process is simple.
In disclosed method, the height of casting sheet temperature influences matt effect, and suitable casting sheet temperature is 25～50 ℃, and temperature is high more, matt effect, but after surpassing 50 ℃,, will influence drawing process because casting sheet degree of crystallinity is too high.
In disclosed method, the extrusion capacity of matt layer extruder is 1/9～3/7 of a high hyaline layer extruder, occupies 10～30% ratio thereby can control described matt layer in overall film thickness.
In disclosed method, draw ratio is relevant with matt effect with draft temperature, and the high more matt effect of draw ratio reduces, and film forming is poor; Draw ratio is more little, and then mechanical properties in films reduces.The big more draft temperature that then needs of draw ratio is just high more.
In disclosed method, heat setting temperature is relevant with matt effect with heat-setting time, and heat-setting time is long more, and thin film mechanical performance reduces; Heat-setting time is short more, the matt effect variation.The high more then matt effect of heat setting temperature is good more.
In disclosed method, for improve high hyaline layer print, aluminize, the bonding force of compound tense, after the thermal finalization step, before the rolling treatment step, the non-dull surface of single-face matt polyester film is carried out surface treatment, be preferably sided corona treatment or online coating and handle.
In disclosed method, the matt layer extruder is preferably selected double screw extruder for use, and double screw extruder is compared with single screw extrusion machine, and the mixing of double screw extruder is more even, thereby improves the surface effect and the film-formation result of film.
By the single-face matt polyester film of the present invention preparation, taking measurement of an angle when being 45 °, the glossiness of its dull surface can reach 15～45%; The light transmittance of film can reach 85～90%.
The specific embodiment
Following embodiment only is used to illustrate the present invention, does not limit protection scope of the present invention.
Embodiment 1
Composition of raw materials:
1) matt layer
PBT (polybutylene terephthalate (PBT)) 80 weight portions;
PA6 20 weight portions;
Sodium Benzoate 0.1 weight portion.
2) high hyaline layer
PET (PETG) 100 weight portions of cutting into slices.
Operating procedure:
PBT, PA6, Sodium Benzoate are mixed in blending bunker in proportion, add double screw extruder, extruder temperature is set at 200 ℃;
After PET section pre-crystallization of process and dry the processing, the control moisture is below 50ppm, and in the adding single screw extrusion machine, extruder temperature is set at 260 ℃;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 25 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 1/9 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 100 ℃ preheating after, 3.0 times of longitudinal stretchings, and then through after 130 ℃ of preheatings, 3.5 times of cross directional stretch are then 180 ℃ of down typings 1 second, at last through supercooling, corona, rolling with cut, obtain the single-face matt membrane sample, its performance sees Table 1.
Embodiment 2
Composition of raw materials:
1) matt layer
PBT (polybutylene terephthalate (PBT)) 50 weight portions;
PET (PETG) 20 weight portions;
PA66 30 weight portions;
Terephthalate carboxylic acid sodium 0.2 weight portion.
2) high hyaline layer
PET (PETG) 100 weight portions of cutting into slices.
Operating procedure:
PBT, PET, PA66, terephthalate carboxylic acid sodium are mixed in blending bunker in proportion, add double screw extruder, extruder temperature is set at 220 ℃;
After PET section pre-crystallization of process and dry the processing, the control moisture is below 50ppm, and in the adding single screw extrusion machine, extruder temperature is set at 270 ℃;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 30 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 4/21 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 95 ℃ preheating after, 2.9 times of longitudinal stretchings, and then through after 124 ℃ of preheatings, 3.4 times of cross directional stretch.Finalized the design 3 seconds down at 190 ℃ at last.Through supercooling, corona, rolling with cut, obtain the single-face matt membrane sample at last, its performance sees Table 1.
Embodiment 3
Composition of raw materials:
1) matt layer
PBT (polybutylene terephthalate (PBT)) 40 weight portions;
PTT (PTT) 20 weight portions;
PA11 40 weight portions;
Substituted aryl phosphate ester salt 0.3 weight portion.
2) high hyaline layer
PET (PETG) 100 weight portions of cutting into slices.
Operating procedure:
PBT, PTT, PA11, substituted aryl phosphate ester salt are mixed in blending bunker in proportion, add double screw extruder, extruder temperature is set at 230 ℃;
After PET section pre-crystallization of process and dry the processing, the control moisture is below 50ppm, and in the adding single screw extrusion machine, extruder temperature is set at 280 ℃;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 35 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 17/63 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 90 ℃ preheating after, 2.8 times of longitudinal stretchings, and then through after 120 ℃ of preheatings, 3.3 times of cross directional stretch.Finalized the design 5 seconds down at 190 ℃ at last.Through supercooling, corona, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
Embodiment 4
Composition of raw materials:
1) matt layer
PBT (polybutylene terephthalate (PBT)) 30 weight portions;
PTT (PTT) 10 weight portions;
PET (PETG) 10 weight portions;
PA12 50 weight portions;
Sorbierite dimethylbenzene 0.2 weight portion that contracts
Substituted aryl phosphate ester salt 0.2 weight portion.
2) high hyaline layer
PET (PETG) 80 weight portions of cutting into slices;
Reclaim PET 20 weight portions (inherent viscosity: more than 0.55) of cutting into slices.
Operating procedure:
Contract dimethylbenzene and substituted aryl phosphate ester salt of PBT, PTT, PET, PA12, sorbierite mixed in blending bunker in proportion, add double screw extruder, extruder temperature is set at 240 ℃;
After PET section pre-crystallization of process and dry the processing, the control moisture is below 50ppm, and in the adding single screw extrusion machine, extruder temperature is set at 290 ℃;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, and in the moulding of sharp cooling roll direct casting sheet, the sharp cooling roll temperature is 40 ℃;
The extrusion capacity of double screw extruder is 22/63 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 85 ℃ preheating after, 2.7 times of longitudinal stretchings, and then through after 115 ℃ of preheatings, 3.2 times of cross directional stretch.Finalized the design 10 seconds down at 200 ℃ at last.Through supercooling, online coating, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
Embodiment 5
Composition of raw materials:
1) matt layer
PET (PETG) 50 weight portions;
PA1010 50 weight portions;
Sodium chloride 0.1 weight portion
Sorbierite dimethylbenzene 0.2 weight portion that contracts
Terephthalate carboxylic acid sodium 0.2 weight portion.
2) high hyaline layer
PET (PETG) 80 weight portions of cutting into slices;
Reclaim PET 20 weight portions (inherent viscosity: more than 0.55) of cutting into slices.
Operating procedure:
Contract dimethylbenzene and terephthalate carboxylic acid sodium of PET, PA1010, sodium chloride, sorbierite mixed in blending bunker in proportion, add double screw extruder, 250 ℃ of extruder temperatures;
PET is cut into slices through after pre-crystallization and dry the processing, control moisture below 50ppm, add in the single screw extrusion machine 280 ℃ of extruder temperatures;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 45 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 3/7 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 80 ℃ preheating after, 2.5 times of longitudinal stretchings, and then through after 100 ℃ of preheatings, 3.0 times of cross directional stretch.Finalized the design 15 seconds down at 220 ℃ at last.Through supercooling, online coating, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
Embodiment 6
Composition of raw materials:
1) matt layer
PTT (PTT) 50 weight portions;
PA6 50 weight portions.
2) high hyaline layer
PET (PETG) 80 weight portions of cutting into slices;
Reclaim PET 20 weight portions (inherent viscosity: more than 0.55) of cutting into slices.
Operating procedure:
PTT, PA6 are mixed in blending bunker in proportion, add double screw extruder, extruder temperature is set at 260 ℃;
After PET section pre-crystallization of process and dry the processing, the control moisture is below 50ppm, and in the adding single screw extrusion machine, extruder temperature is set at 280 ℃;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 50 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 1/3 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 90 ℃ preheating after, 3.0 times of longitudinal stretchings, and then through after 120 ℃ of preheatings, 3.5 times of cross directional stretch.Finalized the design 20 seconds down at 240 ℃ at last.Through supercooling, corona, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
Comparative example 1
1) matt layer
Inferior light polyester slice 100 weight portions (dioxide-containing silica 2%, inherent viscosity 0.55).
2) high hyaline layer
PET (PETG) 80 weight portions of cutting into slices reclaim PET 20 weight portions (inherent viscosity is more than 0.55) of cutting into slices.
Operating procedure:
With inferior light polyester slice, add double screw extruder, 240 ℃ of extruder temperatures;
PET is cut into slices through after pre-crystallization and dry the processing, control moisture below 50ppm, add in the single screw extrusion machine 270 ℃ of extruder temperatures;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 25 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 1/9 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 90 ℃ preheating after, 3.5 times of longitudinal stretchings, and then through after 120 ℃ of preheatings, laterally stay cord is 3.5 times.Finalized the design 3 seconds down at 190 ℃ at last.Through supercooling, corona, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
Comparative example 2
1) matt layer
PET (PETG) 80 weight portions of cutting into slices;
Film level PP (polypropylene) 20 weight portions of cutting into slices.
2) high hyaline layer
PET 80 weight portions;
Reclaim PET 20 weight portions (inherent viscosity: more than 0.55) of cutting into slices.
Operating procedure:
PET section and PP are cut into slices in proportion, add double screw extruder, 230 ℃ of extruder temperatures;
PET is cut into slices through after pre-crystallization and dry the processing, control moisture below 50ppm, add in the single screw extrusion machine 270 ℃ of extruder temperatures;
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 30 ℃ of sharp cooling roll temperature;
The extrusion capacity of double screw extruder is 1/9 of a single screw extrusion machine extrusion capacity;
The casting sheet that obtains through 90 ℃ preheating after, 3.0 times of longitudinal stretchings, and then through after 120 ℃ of preheatings, laterally stay cord is 3.5 times.Finalized the design 5 seconds down at 190 ℃ at last.Through supercooling, corona, rolling with cut, obtain the inferior light membrane sample of sample single face at last, its performance sees Table 1.
The performance table of comparisons of the single-face matt polyester film of table 1 embodiment of the invention and comparative example
| Matt layer glossiness (45 °) % | Light transmittance % | Mist degree % | |
| Embodiment 1 | 44.5 | 89.8 | 15.3 |
| Embodiment 2 | 42.8 | 88.5 | 18.9 |
| Embodiment 3 | 30.5 | 86 | 20 |
| Embodiment 4 | 18.0 | 85.9 | 23.0 |
| Embodiment 5 | 14.4 | 85.6 | 25.6 |
| Embodiment 6 | 29.5 | 88 | 20 |
| Comparative example 1 | 65 | 80 | 38.6 |
| Comparative example 2 | 55 | 75 | 40.8 |
By table 1 as can be seen, the polyester film that adopts disclosed method to produce is compared with the polyester film of produced in conventional processes, and the glossiness of matt layer and mist degree all reduce greatly, and the light transmittance of film improves greatly.
The present invention is not limited to the foregoing description, in order to improve the performance of polyester film, by the technology of coextru-lamination high hyaline layer is arranged to two layers, three layers or multilayer.
Claims (8)
1. single-face matt polyester film,
Have layer structure, comprise first rete and second rete of coextru-lamination and adjacent setting in this layer structure at least, described first rete is positioned at the top layer of this polyester film, it is characterized in that:
Described first rete is a matt layer, contains the polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt% in the described matt layer,
Described second rete is high hyaline layer, and its Main Ingredients and Appearance is a polyester.
2. single-face matt polyester film as claimed in claim 1 is characterized in that: the thickness of described matt layer accounts for 10～30% of overall film thickness.
3. single-face matt polyester film as claimed in claim 1 or 2 is characterized in that: the polyester of described matt layer is one or more the mixture in polybutylene terephthalate (PBT), PTT and the PETG;
The nylon high polymer of described matt layer is one or more the blend among PA6, PA66, PA1010, PA11 and the PA12;
The crystallization nucleation auxiliary agent of described matt layer is contract one or more a mixture in the dimethylbenzene of Sodium Benzoate, sodium chloride, terephthalate carboxylic acid sodium, substituted aryl phosphate ester salt and sorbierite.
4. make the method for single-face matt polyester film, it is characterized in that: comprise the steps
1) polyester of 50～80wt%, the nylon high polymer of 20～50wt% and the crystallization nucleation auxiliary agent of 0～0.5wt% are mixed in blending bunker, enter in the matt layer extruder, be heated into melt;
2) with after polyester slice pre-crystallization of process and dry the processing, enter in the high hyaline layer extruder, be heated into melt;
3) after the melt of being extruded by above-mentioned steps passed through co-extrusion die head, in the moulding of sharp cooling roll direct casting sheet, the sharp cooling roll temperature was set at 25～50 ℃, and the extrusion capacity of matt layer extruder is 1/9～3/7 of a high hyaline layer extruder;
4) stretch: wherein, the temperature of longitudinal stretching is 80～100 ℃, and the longitudinal stretching ratio is 2.5～3.0 times; The temperature of cross directional stretch is 100～130 ℃, and draw ratio is 3.0～3.5 times;
5) thermal finalization: wherein, setting temperature is 180～240 ℃, and shaping time is 1～20 second;
6) rolling is handled.
5. the method for manufacturing single-face matt polyester film as claimed in claim 4 is characterized in that: after the thermal finalization step, before the rolling treatment step, the non-dull surface of single-face matt polyester film is carried out surface treatment.
6. the method for manufacturing single-face matt polyester film as claimed in claim 5 is characterized in that: described surface treatment is that sided corona treatment or online coating are handled.
7. make the method for single-face matt polyester film as described any of claim 4 to 6, it is characterized in that: described matt layer extruder is a double screw extruder, and described high hyaline layer extruder is a single screw extrusion machine.
8. the method for manufacturing single-face matt polyester film as claimed in claim 7 is characterized in that:
The polyester of described matt layer is one or more the mixture in polybutylene terephthalate (PBT), PTT and the PETG;
The nylon high polymer of described matt layer is one or more the blend among PA6, PA66, PA1010, PA11 and the PA12;
The crystallization nucleation auxiliary agent of described matt layer is contract one or more a mixture in the dimethylbenzene of Sodium Benzoate, sodium chloride, terephthalate carboxylic acid sodium, substituted aryl phosphate ester salt and sorbierite.
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| CNA2008100152738A CN101259771A (en) | 2008-04-17 | 2008-04-17 | Single-face matt polyester film and preparation method thereof |
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| CNA2008100152738A CN101259771A (en) | 2008-04-17 | 2008-04-17 | Single-face matt polyester film and preparation method thereof |
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| CN104693699A (en) * | 2010-03-31 | 2015-06-10 | 可隆工业株式会社 | Heat-shrinkable polyester-based single-layer film |
| CN106739367A (en) * | 2016-11-08 | 2017-05-31 | 佛山杜邦鸿基薄膜有限公司 | A kind of single-face matt polyester film and preparation method thereof |
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| CN104385609A (en) * | 2014-09-30 | 2015-03-04 | 厦门海洋南方特种聚酯薄膜有限公司 | Preparation method for high-matte-degree matte polyester film |
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| CN112646323A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Low-glossiness matte polyester film and preparation method thereof |
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