CN101235191B - Special-purpose material for anti-static polyethylene terephthalate bidirectional stretching thin film and preparation - Google Patents
Special-purpose material for anti-static polyethylene terephthalate bidirectional stretching thin film and preparation Download PDFInfo
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- CN101235191B CN101235191B CN2008100600217A CN200810060021A CN101235191B CN 101235191 B CN101235191 B CN 101235191B CN 2008100600217 A CN2008100600217 A CN 2008100600217A CN 200810060021 A CN200810060021 A CN 200810060021A CN 101235191 B CN101235191 B CN 101235191B
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- resin
- polyethylene terephthalate
- pet
- pipe compound
- static inhibitor
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- 229920000139 polyethylene terephthalate Polymers 0.000 title claims abstract description 66
- 239000005020 polyethylene terephthalate Substances 0.000 title claims abstract description 66
- -1 polyethylene terephthalate Polymers 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 title abstract description 6
- 230000002457 bidirectional effect Effects 0.000 title 1
- 239000010409 thin film Substances 0.000 title 1
- 239000011347 resin Substances 0.000 claims abstract description 64
- 229920005989 resin Polymers 0.000 claims abstract description 64
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000002086 nanomaterial Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 32
- 230000003068 static effect Effects 0.000 claims description 30
- 239000003112 inhibitor Substances 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 15
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 13
- 239000002041 carbon nanotube Substances 0.000 claims description 11
- 238000005453 pelletization Methods 0.000 claims description 9
- 229920006146 polyetheresteramide block copolymer Polymers 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 7
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 7
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 238000007334 copolymerization reaction Methods 0.000 claims description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 229960001545 hydrotalcite Drugs 0.000 claims description 3
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 239000005543 nano-size silicon particle Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- VEOIIOUWYNGYDA-UHFFFAOYSA-N 2-[2-(6-aminopurin-9-yl)ethoxy]ethylphosphonic acid Chemical compound NC1=NC=NC2=C1N=CN2CCOCCP(O)(O)=O VEOIIOUWYNGYDA-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 4
- 239000002216 antistatic agent Substances 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 239000000758 substrate Substances 0.000 description 4
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920001634 Copolyester Polymers 0.000 description 1
- 101100242113 Dictyostelium discoideum omt10 gene Proteins 0.000 description 1
- 101150081061 OMT3 gene Proteins 0.000 description 1
- 101100310636 Papaver somniferum SOMT3 gene Proteins 0.000 description 1
- 101100161405 Zea mays AAMT3 gene Proteins 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses special material for antistatic poly ethylene terephthalate biaxial oriented film (BOPET) and the preparation process. The special material is formed by raw materials with the following quality proportion, 60-89% poly ethylene terephthalate (PET) resin, 4-15% antistatic agent, 2-10% inorganic nano material and 5-15% carrier resin. The special material is prepared through the following process that mixing evenly a part of PET resin with antistatic agent, inorganic nano material, carrier resin with high speed, then mixing mixture into a twin-screw extruder to squeeze antistatic master batch, then mixing and squeezing the antistatic master batch with the rest of PET resin in the twin-screw extruder, and dicing to obtain the antistatic BOPET concerned by the invention.The surface electric resistance of BOPET film which is prepared by the special material concerned by the invention can reach 10 9 omega, the film has excellent film transparent, and has favorable mechanical property.
Description
(1) technical field
The present invention relates to the antistatic modified of polymer materials, especially the polyethylene terephthalate (PET) that meets the packaging field requirement is antistatic modified, is specifically related to PP Pipe Compound of a kind of anlistatig polyethylene terephthalate biaxially oriented film (BOPET) and preparation method thereof.
(2) background technology
Advantage such as that the PET resin has is transparent, intensity is high, oil resistant, nontoxic and use temperature scope are wide.But also there are some shortcomings in PET as wrapping material, and is tight as structure, and the degree of crystallinity height lacks hydrophilic radical, and water absorbability is very poor, thereby then easier build up of electrostatic charge produces static in the occasion of low humidity, and volume specific resistance is up to 10
14Ω cm.Product influences appearance effect because of electrostatic problem adsorbs dust easily, and particularly when the static charge capacity reached certain value, also security incident caused because of discharge in regular meeting.Adopt PET/ polyoxyethylene glycol (PEG) copolymerization (polymer material science and engineering at present, 2002 the 18th the 5th phases of volume, the 50-53 page or leaf), nanometer is assembled high molecular PET antistatic fibre (synthon, 2003 the 4th phases, 21-22,28) etc. method is carried out antistatic modified to PET, though the antistatic property of copolyesters can reach antistatic requirement substantially, but its complex process, cost is higher, processing is difficult, even very big to the transparency influence of PET, has limited its development, and adopt carbon nanotube (CNTs) to make the static resistance (synthon that antistatic master batch improves PET, 2007 the 7th phases, the 15-17 page or leaf) then exist add-on big, problems such as surface resistivity decline is few can't satisfy the requirement of producing transparent BOPET film.
(3) summary of the invention
The technical problem to be solved in the present invention provides a kind of PP Pipe Compound that is used to prepare antistatic polyethylene terephthalate biaxially oriented film (BOPET), solve antistatic in the past PET complicated process of preparation, perhaps static inhibitor is to the big and expensive shortcoming of film transparency influence, to satisfy the demand of electronic enterprises to transparent packaging film with antistatic property.
The technical solution adopted in the present invention is: the PP Pipe Compound of a kind of anlistatig polyethylene terephthalate biaxially oriented film (BOPET), described PP Pipe Compound is formed (in mass percent) by following quality proportion raw material: PET resin 60～89%, static inhibitor 4～15%, inorganic nano material 2～10%, vector resin 5～15%.
Preferably consist of (in mass percent): PET resin 78%, static inhibitor 5%, inorganic nano material 2%, vector resin 15%.
Further, static inhibitor of the present invention is any two the compound in polyoxyethylene (PEO), polyoxyethylene glycol (PEG), polyethylene glycol methacrylic acid interpolymer (PEGMA), polyether ester amides (PEEA), polyether ester ethanamide (PEAI) or the epoxypropane copolymerization thing (PEO-ECH), and compound proportion is 1: 1 by mass.
Described inorganic nano material is preferably organic nano imvite (OMT, median size is less than 10 microns), nano silicon (nano-CaCO
3, median size is less than 70 nanometers), nano hydrotalcite (nano-HT, median size is less than 10 microns), CNT (carbon nano-tube) (CNTs, mean diameter is less than 20 nanometers) or carbon black (CB, median size is less than 20 nanometers).
Described vector resin is polycarbonate (PC), glycol-modified polyethylene terephthalate (PETG), polybutylene terephthalate (PBT) or di-carboxylic acid modification polyethylene terephthalate (APET) preferably.
The present invention also provides the preparation method of the PP Pipe Compound of a kind of anlistatig BOPET, be PET resin 60～89% promptly by the quality proportioning, static inhibitor 4～15%, inorganic nano material 2～10%, vector resin 5～15% takes by weighing raw material, the PET resin and the static inhibitor of raw material total mass 10～39% will be accounted for, inorganic nano material, the vector resin high-speed mixing is even, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of described twin screw extruder is controlled at 235～265 ℃.
The PP Pipe Compound that the present invention is made adds in the single screw extrusion machine, 235～265 ℃ of control extruder barrel temperature, the PP Pipe Compound melt-flow is crossed the diaphragm head that is installed on the forcing machine and is entered cooling roller and obtain antistatic PET substrate, by drafting system substrate is introduced the two-way stretch system, earlier substrate is heated, heating and temperature control is at 90～120 ℃, substrate to heating carries out two-way stretch then, stretching ratio can be controlled according to the product specific requirement, and the diaphragm after the stretching can obtain antistatic BOPET by operations such as typing, coolings.
Compared with prior art, the BOPET surface resistivity of utilizing PP Pipe Compound of the present invention to make can reach 10
9Ω, and the mechanical property that has of film meets the requirement of GB/T 16958-1997 packaging biaxially oriented polyester film standard.
(4) embodiment
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
Prescription (mass percent): PET resin 73%, composite static inhibitor (PEO/PEG=1/1) 9%, OMT3%, PC resin 15%.
PET resin with 23%, composite static inhibitor, OMT and PC resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 50%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 7.8 * 10
9Ω, tensile strength is 54.8MPa, and bending strength is 55.2MPa, and modulus in flexure is 1131.2MPa, shock strength 8.04Kj/m
2
Embodiment 2
Prescription (mass percent): PET resin: 60%, composite static inhibitor (PEG/PEEA=1/1): 15%, nano-CaCO
310%, PBT resin 15%.
PET resin with 20%, composite static inhibitor, OMT and PBT resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 50%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 9.3 * 10
9Ω, tensile strength is 43.0MPa, and bending strength is 50.0MPa, and modulus in flexure is 890.0MPa, shock strength 8.88Kj/m
2
Embodiment 3
Prescription (mass percent): PET:81%, composite static inhibitor (PEAI/PEO=1/1) 4%, nano-HT 10%, PETG resin 5%.
PET resin with 21%, composite static inhibitor, nano-HT and PETG resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 60%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET film that makes with above-mentioned prescription and technology is 8.5 * 10
10Ω, tensile strength is 46.5MPa, and bending strength is 62.0MPa, and modulus in flexure is 1151.0MPa, shock strength 9.11Kj/m
2
Embodiment 4
Prescription (mass percent): PET:70%, composite static inhibitor (PEGMA/PEO-ECH=1/1) 7%, CB:8%, APET resin 15%.
PET resin with 20%, composite static inhibitor, CB and APET resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 50%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 8.1 * 10
9Ω, tensile strength is 31.0MPa, and bending strength is 55.5MPa, and modulus in flexure is 974.6MPa, shock strength 12.35Kj/m
2
Embodiment 5
Prescription (mass percent): PET resin 65%, composite static inhibitor (PEO/PEEA=1/1) 10%, OMT10%, PBT resin 15%.
PET resin with 25%, composite static inhibitor, OMT and PBT resin resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 40%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains antistatic BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 4.9 * 10
10Ω, tensile strength is 47.2MPa, and bending strength is 54.0MPa, and modulus in flexure is 984.2MPa, shock strength 9.61Kj/m
2
Embodiment 6
Prescription (mass percent): PET resin 89%, composite static inhibitor (PEGMA/PEO=1/1) 4%, CNTs 2%, APET resin 5%.
PET resin with 19%, composite static inhibitor, CNTs and APET resin resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 70%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains anlistatig BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 7.7 * 10
9Ω, tensile strength is 43.7MPa, and bending strength is 54.5MPa, and modulus in flexure is 1078.5MPa, shock strength 10.90Kj/m
2
Embodiment 7
Prescription (mass percent) PET78%, composite static inhibitor (PEO/PEEA=1/1) 5%, nano imvite (nano-MMT) 2%, APET resin 15%.
PET resin with 19%, composite static inhibitor, nano-MMT and APET resin resin mixed in high-speed mixer 10 minutes, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining 59%PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains antistatic BOPET of the present invention, the barrel temperature of twin screw extruder is controlled at 235～265 ℃.
The surface resistivity of the BOPET that makes with above-mentioned prescription and technology is 6.3 * 10
7Ω, tensile strength is 41.0MPa, and bending strength is 61.0MPa, and modulus in flexure is 1104.6MPa, shock strength 8.56Kj/m
2
Claims (6)
1. the PP Pipe Compound of an anlistatig polyethylene terephthalate biaxially oriented film, described PP Pipe Compound is made up of following quality proportion raw material: polyethylene terephthalate (PET) resin 60～89%, static inhibitor 4～15%, inorganic nano material 2～10%, vector resin 5～15%; And all components sum is 100%; Described vector resin is polycarbonate, glycol-modified polyethylene terephthalate, polybutylene terephthalate or di-carboxylic acid modification polyethylene terephthalate.
2. the PP Pipe Compound of anlistatig polyethylene terephthalate biaxially oriented film as claimed in claim 1, it is characterized in that described static inhibitor is any two a compound among polyoxyethylene, polyoxyethylene glycol, polyethylene glycol methacrylic acid interpolymer, polyether ester amides PEEA, polyether ester ethanamide PEAI or the epoxypropane copolymerization thing PEO-ECH, compound proportion is 1: 1 by mass.
3. the PP Pipe Compound of anlistatig polyethylene terephthalate biaxially oriented film as claimed in claim 1 is characterized in that described inorganic nano material is organic nano imvite, nano silicon, nano hydrotalcite, CNT (carbon nano-tube) or carbon black.
4. the PP Pipe Compound of anlistatig polyethylene terephthalate biaxially oriented film as claimed in claim 1, it is characterized in that described PP Pipe Compound is made up of following quality proportion raw material: PET resin 60～89%, static inhibitor 4～15%, inorganic nano material 2～10%, vector resin 5～15%; And all components sum is 100%; Described static inhibitor is a polyoxyethylene, polyoxyethylene glycol, polyethylene glycol methacrylic acid interpolymer, polyether ester amides PEEA, any two are by 1: 1 composite compound that obtains of mass ratio among polyether ester ethanamide PEAI or the epoxypropane copolymerization thing PEO-ECH, described inorganic nano material is an organic nano imvite, nano silicon, nano hydrotalcite, CNT (carbon nano-tube) or carbon black, described vector resin are polycarbonate, polyethylene terephthalate, glycol-modified polyethylene terephthalate or di-carboxylic acid modification polyethylene terephthalate.
5. as the PP Pipe Compound of the described anlistatig polyethylene terephthalate biaxially oriented film of one of claim 1～4, it is characterized in that described PP Pipe Compound is made up of following quality proportion raw material: PET resin 78%, static inhibitor 5%, inorganic nano material 2%, vector resin 15%.
6. the preparation method of the PP Pipe Compound of an anlistatig polyethylene terephthalate biaxially oriented film as claimed in claim 4, it is characterized in that described preparation method is: by the quality proportioning is PET resin 60～89%, static inhibitor 4～15%, inorganic nano material 2～10%, vector resin 5～15% takes by weighing raw material, the PET resin and the static inhibitor of raw material total mass 10～39% will be accounted for, inorganic nano material, the vector resin high-speed mixing is even, then mixture is added the mixed masterbatch that gets of twin screw extruder, again with masterbatch and remaining PET mixed with resin, mix in twin screw extruder and extrude the PP Pipe Compound that also pelletizing obtains described anlistatig BOPET, the barrel temperature of described twin screw extruder is controlled at 235～265 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100600217A CN101235191B (en) | 2008-02-29 | 2008-02-29 | Special-purpose material for anti-static polyethylene terephthalate bidirectional stretching thin film and preparation |
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|---|---|---|---|
| CN2008100600217A CN101235191B (en) | 2008-02-29 | 2008-02-29 | Special-purpose material for anti-static polyethylene terephthalate bidirectional stretching thin film and preparation |
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| CN101235191A CN101235191A (en) | 2008-08-06 |
| CN101235191B true CN101235191B (en) | 2010-12-22 |
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| CN103048711B (en) * | 2012-12-29 | 2015-06-10 | 四川东材绝缘技术有限公司 | Composite biaxial tension light reflection polypropylene film and manufacturing method thereof |
| CN103048710B (en) * | 2012-12-29 | 2015-05-20 | 四川东方绝缘材料股份有限公司 | Composite salivate method light reflection sheet and manufacturing method thereof |
| CN104086957B (en) * | 2014-07-15 | 2016-01-13 | 杭州华塑实业股份有限公司 | Anlistatig PET polyester film of a kind of high transparency and preparation method thereof |
| CN104151797A (en) * | 2014-08-14 | 2014-11-19 | 苏州卓越工程塑料有限公司 | Antistatic anti-scratch PET |
| CN105419064B (en) * | 2015-12-31 | 2018-04-24 | 北京泰克来尔科技有限公司 | A kind of layered composite metal hydroxides and its multifunctional mother granules preparation method |
| CN106221147B (en) * | 2016-08-18 | 2018-07-13 | 江苏绿洲园艺绿化有限公司 | A kind of preparation method of vapor-permeable type flower packaging film |
| CN106280314B (en) * | 2016-08-18 | 2018-09-07 | 江苏绿洲园艺绿化有限公司 | A kind of preparation method of fresh flower film for packaging |
| CN108239376A (en) * | 2018-01-31 | 2018-07-03 | 苏州维洛克电子科技有限公司 | A kind of temperature-resistanpolyester polyester film and preparation method thereof |
| CN111087770A (en) * | 2019-12-30 | 2020-05-01 | 纳琳威纳米科技南通有限公司 | Nano transparent antistatic master batch |
| CN113444347A (en) * | 2021-08-12 | 2021-09-28 | 四川诚吉新材料有限公司 | Reinforced thermoplastic plastic sheet and preparation method thereof |
| CN117209979B (en) * | 2023-10-31 | 2024-06-21 | 肇庆凯盛电子科技有限公司 | Ultraviolet-resistant and heat-resistant PET (polyethylene terephthalate) film material as well as preparation method and application thereof |
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| CN101235191A (en) | 2008-08-06 |
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