CN114395193A - Polypropylene film and preparation method thereof - Google Patents
Polypropylene film and preparation method thereof Download PDFInfo
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- CN114395193A CN114395193A CN202210211770.5A CN202210211770A CN114395193A CN 114395193 A CN114395193 A CN 114395193A CN 202210211770 A CN202210211770 A CN 202210211770A CN 114395193 A CN114395193 A CN 114395193A
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- polypropylene
- boron nitride
- hexagonal boron
- polypropylene film
- modified hexagonal
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- -1 Polypropylene Polymers 0.000 title claims abstract description 68
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 68
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052582 BN Inorganic materials 0.000 claims abstract description 37
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002135 nanosheet Substances 0.000 claims abstract description 37
- 239000002667 nucleating agent Substances 0.000 claims abstract description 19
- 239000003960 organic solvent Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical group CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 24
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 6
- 239000000600 sorbitol Substances 0.000 claims description 6
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 5
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 4
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 claims description 4
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 230000003749 cleanliness Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- YWEWWNPYDDHZDI-JJKKTNRVSA-N (1r)-1-[(4r,4ar,8as)-2,6-bis(3,4-dimethylphenyl)-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C1=C(C)C(C)=CC=C1C1O[C@H]2[C@@H]([C@H](O)CO)OC(C=3C=C(C)C(C)=CC=3)O[C@H]2CO1 YWEWWNPYDDHZDI-JJKKTNRVSA-N 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009210 therapy by ultrasound Methods 0.000 description 4
- 238000004821 distillation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1575—Six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a polypropylene film, which comprises the following raw materials: polypropylene, an alpha-nucleating agent and modified hexagonal boron nitride nanosheets, wherein the weight of the modified hexagonal boron nitride nanosheets is 4-6 wt% of the weight of the polypropylene; the modified hexagonal boron nitride nanosheet is a carbon-carbon double bond-containing silane coupling agent graft-modified hexagonal boron nitride nanosheet. The invention also discloses a preparation method of the polypropylene film, which comprises the following steps: uniformly dispersing polypropylene, an alpha-nucleating agent and a modified hexagonal boron nitride nanosheet in an organic solvent, removing the organic solvent, melting and blending, and performing hot press molding to obtain the polypropylene film. The invention selects the mutual matching of the alpha-nucleating agent and the modified hexagonal boron nitride nanosheet, and combines a proper process, so that the polypropylene film has good dielectric constant, and simultaneously has good mechanical property and breakdown property.
Description
Technical Field
The invention relates to the technical field of capacitor films, in particular to a polypropylene film and a preparation method thereof.
Background
Dielectric materials with high dielectric constants, low dielectric losses, and high energy storage densities have broad application prospects in modern electronic and electrical devices. Polymer films are the first choice for dielectric materials for capacitors, among which polypropylene films are commonly used. However, the low dielectric constant of polypropylene (about 2.2 at 1 kHz) hinders the increase of the energy storage density during use, and limits the application of polypropylene films and the development of film capacitors. Therefore, it is necessary to increase the dielectric constant of the BOPP film, but when the dielectric constant is increased, the breakdown strength tends to be lowered, and both properties cannot be simultaneously increased.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a polypropylene film and a preparation method thereof.
The invention provides a polypropylene film, which comprises the following raw materials: polypropylene, an alpha-nucleating agent and modified hexagonal boron nitride nanosheets, wherein the weight of the modified hexagonal boron nitride nanosheets is 4-6 wt% of the weight of the polypropylene; the modified hexagonal boron nitride nanosheet is a carbon-carbon double bond-containing silane coupling agent graft-modified hexagonal boron nitride nanosheet.
Preferably, the weight of the alpha-nucleating agent is 0.01 to 0.03 wt% of the weight of the polypropylene.
Preferably, the alpha-nucleating agent is bis (3, 4-dimethyldibenzylidene) sorbitol.
Preferably, the polypropylene has an isotacticity of 98.5% or more.
The proper isotacticity is selected to be matched with the alpha-nucleating agent, so that the content of an alpha crystal form in the film can be improved, the breakdown performance of the film is improved, the alpha-nucleating agent and the modified hexagonal boron nitride nanosheets are matched with each other, the dielectric performance of the film can be improved while the good breakdown performance is kept, and the problem of reduction of mechanical performance when the content of the high alpha crystal form is high can be solved by the uniformly dispersed hexagonal boron nitride nanosheets.
Preferably, the polypropylene has a melt index of 3.2 to 3.5g/10 min.
Preferably, the silane coupling agent containing a carbon-carbon double bond is at least one of gamma-methacryloxypropyltrimethoxysilane, vinyltrimethoxysilane and vinyltriethoxysilane.
The invention also provides a preparation method of the polypropylene film, which comprises the following steps: uniformly dispersing polypropylene, an alpha-nucleating agent and a modified hexagonal boron nitride nanosheet in an organic solvent, removing the organic solvent, melting and blending, and performing hot press molding to obtain the polypropylene film.
According to the invention, the polypropylene, the alpha-nucleating agent and the modified hexagonal boron nitride nanosheet are uniformly dispersed in the organic solvent, then the organic solvent is removed, and then the melt blending is carried out, so that the dispersibility of the alpha-nucleating agent and the modified hexagonal boron nitride nanosheet in the polypropylene can be greatly improved, the gap between the hexagonal boron nitride nanosheet and the polypropylene matrix is reduced, and the mechanical property and the dielectric property of the film are improved. During hot press molding, carbon-carbon double bonds on the modified hexagonal boron nitride nanosheets can be copolymerized to form a network, so that the mechanical property of the film is further improved.
Preferably, the organic solvent is N, N dimethylformamide or decalin.
Preferably, the melting temperature is 170-180 ℃ and the melting time is 25-35 min.
Washing, impurity removal and ash removal treatment are carried out on the polypropylene and the modified hexagonal boron nitride nanosheets before melting; the film material for the capacitor is prepared in an environment with the cleanliness level of ten thousand or less. Therefore, the medium ash content of the film can be reduced, the dielectric loss of the film can be reduced, and the electric field resistance can be improved.
Has the advantages that:
according to the invention, polypropylene, an alpha-nucleating agent and modified hexagonal boron nitride nanosheets are uniformly dispersed in an organic solvent, then the organic solvent is removed, and then the organic solvent is melted and blended, so that the dispersibility of the alpha-nucleating agent and the modified hexagonal boron nitride nanosheets in polypropylene can be greatly improved, and the gap between the hexagonal boron nitride nanosheets and a polypropylene matrix is reduced, thereby improving the mechanical property and the dielectric property of the film; the hexagonal boron nitride nanosheets uniformly dispersed in a proper amount can improve the dielectric property and keep good breakdown property; selecting polypropylene with higher isotacticity and a proper amount of alpha-nucleating agent to ensure that the film has more alpha crystal forms, thereby improving the breakdown performance of the film; in addition, during hot press molding, carbon-carbon double bonds on the modified hexagonal boron nitride nanosheets can be copolymerized to form a network, so that the problem of mechanical property reduction caused by more alpha crystal forms can be solved; the polypropylene has better processability due to the proper melt index; according to the invention, the alpha-nucleating agent and the modified hexagonal boron nitride nanosheet are matched with each other, and a proper preparation process is combined, so that the polypropylene has good dielectric property and simultaneously keeps good breakdown performance and mechanical property.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A polypropylene film, the raw materials of which comprise: polypropylene with isotacticity more than or equal to 98.5 percent and melt index of 3.2-3.5g/10min 10g, bis (3, 4-dimethyl dibenzylidene) sorbitol 0.001g and gamma-methacryloxypropyl trimethoxy silane modified hexagonal boron nitride nanosheet 0.4 g.
The preparation method of the polypropylene film comprises the following steps:
adding 10g of polypropylene and 0.4g of gamma-methacryloxypropyltrimethoxysilane modified hexagonal boron nitride nanosheets into 20ml of N, N-dimethylformamide, uniformly mixing, stirring and carrying out ultrasonic treatment for 1 hour to uniformly disperse, then adding 0.001g of bis (3, 4-dimethylbenzylidene) sorbitol, continuously stirring and carrying out ultrasonic treatment for 10min, then carrying out reduced pressure distillation to remove the N, N-dimethylformamide, heating to 170 ℃ in a production environment with ten thousand grades of cleanliness, carrying out melt blending for 35min, and carrying out hot press molding to obtain the polypropylene film.
Example 2
A polypropylene film, the raw materials of which comprise: 10g of polypropylene with the isotacticity of more than or equal to 98.5 percent and the melt index of 3.2-3.5g/10min, 0.003g of bis (3, 4-dimethyl dibenzylidene) sorbitol and 0.6g of vinyltrimethoxysilane modified hexagonal boron nitride nanosheets.
The preparation method of the polypropylene film comprises the following steps: adding 10g of polypropylene and 0.6g of vinyltrimethoxysilane modified hexagonal boron nitride nanosheet into 20ml of N, N-dimethylformamide, uniformly mixing, stirring and carrying out ultrasonic treatment for 1h to uniformly disperse, then adding 0.003g of bis (3, 4-dimethylbenzylidene) sorbitol, continuously stirring and carrying out ultrasonic treatment for 10min, then carrying out reduced pressure distillation to remove the N, N-dimethylformamide, heating to 180 ℃ in a production environment with ten thousand grades of cleanliness, carrying out melt blending for 25min, and carrying out hot press molding to obtain the polypropylene film.
Example 3
A polypropylene film, the raw materials of which comprise: polypropylene with isotacticity more than or equal to 98.5 percent and melt index of 3.2-3.5g/10min 10g, bis (3, 4-dimethyl dibenzylidene) sorbitol 0.002g and vinyltriethoxysilane modified hexagonal boron nitride nanosheet 0.5 g.
The preparation method of the polypropylene film comprises the following steps: adding 10g of polypropylene and 0.5g of vinyltriethoxysilane modified hexagonal boron nitride nanosheet into 20ml of N, N-dimethylformamide, uniformly mixing, stirring and ultrasonically dispersing for 1h, then adding 0.002g of bis (3, 4-dimethylbenzylidene) sorbitol, continuously stirring and ultrasonically dispersing for 10min, then carrying out reduced pressure distillation to remove the N, N-dimethylformamide, heating to 175 ℃ in a production environment with ten thousand grades of cleanliness, melting and blending for 30min, and carrying out hot press molding to obtain the polypropylene film.
Comparative example 1
The process is the same as example 3 except that no vinyltriethoxysilane-modified hexagonal boron nitride nanosheet is added.
Comparative example 2
The procedure of example 3 was repeated except that bis (3, 4-dimethylbenzylidene) sorbitol was not added.
Comparative example 3
The raw material ratio is the same as that of the example 3;
the preparation method comprises the following steps: in a production environment with ten thousand grades of cleanliness, polypropylene, a vinyltriethoxysilane modified hexagonal boron nitride nanosheet and bis (3, 4-dimethyl dibenzylidene) sorbitol are directly taken to be melted and blended for 30min at 175 ℃, and then hot-press molding is carried out to obtain the polypropylene film.
The films obtained in examples 1 to 3 and comparative examples 1 to 3 were subjected to property testing and compared with polypropylene films, and the results are shown in Table 1.
Vacuum evaporating aluminum electrodes on two sides of the film, and detecting the dielectric constant with a test frequency of 100-107Hz。
The film is placed between clamping plates of two electrodes of a high-voltage breakdown tester, silicone oil is used as a conductive solution, a direct current output mode is used as a current output mode, the testing temperature is room temperature, and the current breaks through the film and generates a black focus as a mark for testing end.
Tensile properties were measured according to IEC 60674-2.
TABLE 1 test results
| Item | Dielectric constant | Breakdown Performance MV/m | Tensile strength MPa |
| Example 1 | 3.1 | 377 | 179 |
| Example 2 | 3.0 | 390 | 170 |
| Example 3 | 3.2 | 385 | 185 |
| Comparative example 1 | 2.3 | 322 | 115 |
| Comparative example 2 | 2.5 | 330 | 190 |
| Comparative example 3 | 2.6 | 341 | 152 |
| Polypropylene | 2.2 | 301 | 141 |
As can be seen from table 1: the invention has good dielectric property and breakdown property, and good mechanical property.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A polypropylene film, characterized in that it comprises the following raw materials: polypropylene, an alpha-nucleating agent and modified hexagonal boron nitride nanosheets, wherein the weight of the modified hexagonal boron nitride nanosheets is 4-6 wt% of the weight of the polypropylene; the modified hexagonal boron nitride nanosheet is a carbon-carbon double bond-containing silane coupling agent graft-modified hexagonal boron nitride nanosheet.
2. The polypropylene film of claim 1, wherein the amount of the α -nucleating agent is 0.01 to 0.03 wt% based on the weight of the polypropylene.
3. The polypropylene film according to claim 1 or 2, wherein the α -nucleating agent is bis (3, 4-dimethyldibenzylidene) sorbitol.
4. Polypropylene film according to any of claims 1-3, whereby the polypropylene has an isotacticity of 98.5% or more.
5. Polypropylene film according to any of claims 1-4, whereby the polypropylene has a melt index of 3.2-3.5g/10 min.
6. The polypropylene film according to any one of claims 1 to 5, wherein the silane coupling agent having a carbon-carbon double bond is at least one of gamma-methacryloxypropyltrimethoxysilane, vinyltrimethoxysilane and vinyltriethoxysilane.
7. A process for the preparation of a polypropylene film according to any one of claims 1 to 6, comprising the steps of: uniformly dispersing polypropylene, an alpha-nucleating agent and a modified hexagonal boron nitride nanosheet in an organic solvent, removing the organic solvent, melting and blending, and performing hot press molding to obtain the polypropylene film.
8. The method for preparing a polypropylene film according to claim 7, wherein the organic solvent is N, N-dimethylformamide or decalin.
9. The method for preparing a polypropylene film according to claim 7 or 8, wherein the melting temperature is 170-180 ℃ and the melting time is 25-35 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210211770.5A CN114395193A (en) | 2022-03-04 | 2022-03-04 | Polypropylene film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210211770.5A CN114395193A (en) | 2022-03-04 | 2022-03-04 | Polypropylene film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194977A (en) * | 2022-07-18 | 2022-10-18 | 天津大学 | Method for improving high-temperature breakdown performance of long-chain branched polypropylene film for capacitor |
| CN115547691A (en) * | 2022-11-04 | 2022-12-30 | 深圳市米韵科技有限公司 | Heat-conducting diaphragm for high-frequency capacitor and preparation method thereof |
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| CN113195605A (en) * | 2018-12-20 | 2021-07-30 | 博里利斯股份公司 | Biaxially oriented polypropylene film with improved puncture strength |
| CN114015151A (en) * | 2021-10-28 | 2022-02-08 | 安徽飞达电气科技有限公司 | Polypropylene capacitor film with high breakdown voltage |
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2022
- 2022-03-04 CN CN202210211770.5A patent/CN114395193A/en active Pending
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| US20130303684A1 (en) * | 2010-08-06 | 2013-11-14 | Borealis Ag | Bopp film with high ac breakdown strength |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194977A (en) * | 2022-07-18 | 2022-10-18 | 天津大学 | Method for improving high-temperature breakdown performance of long-chain branched polypropylene film for capacitor |
| CN115547691A (en) * | 2022-11-04 | 2022-12-30 | 深圳市米韵科技有限公司 | Heat-conducting diaphragm for high-frequency capacitor and preparation method thereof |
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