CN102543425A - Method for producing high temperature resistant polypropylene capacitance film - Google Patents
Method for producing high temperature resistant polypropylene capacitance film Download PDFInfo
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- CN102543425A CN102543425A CN2012100604661A CN201210060466A CN102543425A CN 102543425 A CN102543425 A CN 102543425A CN 2012100604661 A CN2012100604661 A CN 2012100604661A CN 201210060466 A CN201210060466 A CN 201210060466A CN 102543425 A CN102543425 A CN 102543425A
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- state melt
- temperature resistant
- high temperature
- viscous state
- resistant polypropylene
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Abstract
The invention relates to a method for producing a high temperature resistant polypropylene capacitance film. The method is characterized by comprising the following steps of: (a), putting polypropylene raw materials in an extruder, heating the materials at the temperature of between 200 and 220 DEG C for 1 to 3 hours, and extruding to form uniformly melted viscous-state melt; (b), filtering impurities out of the viscous-state melt by using a filter; (c), performing cooling solidification and casting on the filtered viscous-state melt by using a casting drum to form a required film; and (d), performing heat shrinkage in a transverse direction and a longitudinal direction at a heat shrinkage rate of 1.5 to 2.8 percent. The invention has the advantages that: the contact resistance and loss are reduced, heating and temperature rise are reduced, practical requirements of high-power alternating current, pulse, power and other capacitors are met, the product has complete inner microstructure, high high-temperature resistance and high tensile strength, the production process is simple, and the working efficiency is improved.
Description
Technical field
The present invention relates to a kind of production method of high temperature resistant polypropylene capactive film.
Background technology
Polypropylene capactive film still owing to reasons such as polypropylene capactive film internal microstructure, causes horizontal percent thermal shrinkage bigger than normal relatively owing to their good serviceabilities are used for a lot of different packaging applications; In metallized capacitor making and use, cause the capacitor temperature to raise, make capacitor be prone to puncture; And horizontal and vertical contraction is serious; Cause condenser capacity to descend, for addressing the above problem, the spy provides a kind of new technical scheme.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of high temperature resistant polypropylene capactive film.
The technical scheme that the present invention adopts is:
A kind of production method of high temperature resistant polypropylene capactive film may further comprise the steps:
A, pp material is put in the extruder, under 200 ℃ ~ 220 ℃, heated 1-3 hour, extrude then and form the uniform viscous state melt of fusion;
B, with the viscous state melt through the impurity in the filter elimination viscous state melt;
C, will cross filtration the viscous state melt through curtain coating drum cooling curing, casting sheet, form needed sheet;
D, laterally and on the longitudinal direction carry out thermal contraction, percent thermal shrinkage is 1.5%-2.8%.
Said curtain coating drum cooling curing temperature is 75 ℃-90 ℃.
Said laterally with longitudinal direction on percent thermal shrinkage be to heat 8-12 minute 125 ℃ of-145 ℃ of temperature.
Advantage of the present invention is: reduced contact resistance and loss; Reduce heating up; Reach the practical requirement of capacitors such as high power AC, pulse, electric power, guaranteed that product has perfect internal microstructure, product is high temperature resistant, hot strength is big; Production technology is easy, has improved operating efficiency.
Embodiment
Embodiment 1
The production method of a kind of high temperature resistant polypropylene capactive film of the present invention may further comprise the steps:
A, pp material is put in the extruder, under 200 ℃, heated 1 hour, extrude then and form the uniform viscous state melt of fusion;
B, with the viscous state melt through the impurity in the filter elimination viscous state melt;
C, will cross filtration the viscous state melt through curtain coating drum cooling curing, casting sheet, curtain coating drum cooling curing temperature is 75 ℃, forms needed sheet;
D, laterally with on the longitudinal direction carry out thermal contraction, percent thermal shrinkage is 1.5%, and percent thermal shrinkage is to heat 8 minutes 125 ℃ of temperature laterally and on the longitudinal direction.
Advantage of the present invention is: reduced contact resistance and loss; Reduce heating up; Reach the practical requirement of capacitors such as high power AC, pulse, electric power, guaranteed that product has perfect internal microstructure, product is high temperature resistant, hot strength is big; Production technology is easy, has improved operating efficiency.
Embodiment 2
The production method of a kind of high temperature resistant polypropylene capactive film of the present invention may further comprise the steps:
A, pp material is put in the extruder, under 210 ℃, heated 2 hours, extrude then and form the uniform viscous state melt of fusion;
B, with the viscous state melt through the impurity in the filter elimination viscous state melt;
C, will cross filtration the viscous state melt through curtain coating drum cooling curing, casting sheet, curtain coating drum cooling curing temperature is 85 ℃, forms needed sheet;
D, laterally with on the longitudinal direction carry out thermal contraction, percent thermal shrinkage is 2%, and percent thermal shrinkage is to heat 10 minutes 135 ℃ of temperature laterally and on the longitudinal direction.
Advantage of the present invention is: reduced contact resistance and loss; Reduce heating up; Reach the practical requirement of capacitors such as high power AC, pulse, electric power, guaranteed that product has perfect internal microstructure, product is high temperature resistant, hot strength is big; Production technology is easy, has improved operating efficiency.
Embodiment 3
The production method of a kind of high temperature resistant polypropylene capactive film of the present invention may further comprise the steps:
A, pp material is put in the extruder, under 220 ℃, heated 3 hours, extrude then and form the uniform viscous state melt of fusion;
B, with the viscous state melt through the impurity in the filter elimination viscous state melt;
C, will cross filtration the viscous state melt through curtain coating drum cooling curing, casting sheet, curtain coating drum cooling curing temperature is 90 ℃, forms needed sheet;
D, laterally with on the longitudinal direction carry out thermal contraction, percent thermal shrinkage is 2.8%, and percent thermal shrinkage is to heat 12 minutes 145 ℃ of temperature laterally and on the longitudinal direction.
Advantage of the present invention is: reduced contact resistance and loss; Reduce heating up; Reach the practical requirement of capacitors such as high power AC, pulse, electric power, guaranteed that product has perfect internal microstructure, product is high temperature resistant, hot strength is big; Production technology is easy, has improved operating efficiency.
Claims (3)
1. the production method of a high temperature resistant polypropylene capactive film is characterized in that: may further comprise the steps:
A, pp material is put in the extruder, under 200 ℃ ~ 220 ℃, heated 1-3 hour, extrude then and form the uniform viscous state melt of fusion;
B, with the viscous state melt through the impurity in the filter elimination viscous state melt;
C, will cross filtration the viscous state melt through curtain coating drum cooling curing, casting sheet, form needed sheet;
D, laterally and on the longitudinal direction carry out thermal contraction, percent thermal shrinkage is 1.5%-2.8%.
2. high temperature resistant polypropylene capactive film according to claim 1 and production method is characterized in that: said curtain coating drum cooling curing temperature is 75 ℃-90 ℃.
3. the production method of a kind of high temperature resistant polypropylene capactive film according to claim 1 is characterized in that: said laterally with longitudinal direction on percent thermal shrinkage be to heat 8-12 minute 125 ℃ of-145 ℃ of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100604661A CN102543425A (en) | 2012-03-09 | 2012-03-09 | Method for producing high temperature resistant polypropylene capacitance film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100604661A CN102543425A (en) | 2012-03-09 | 2012-03-09 | Method for producing high temperature resistant polypropylene capacitance film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102543425A true CN102543425A (en) | 2012-07-04 |
Family
ID=46350080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100604661A Pending CN102543425A (en) | 2012-03-09 | 2012-03-09 | Method for producing high temperature resistant polypropylene capacitance film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102543425A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440041A (en) * | 2002-08-08 | 2003-09-03 | 江苏南天集团股份有限公司 | High temperature resistant polypropylene capactive film and production thereof |
| CN1631652A (en) * | 2004-12-31 | 2005-06-29 | 浙江南洋电子薄膜有限公司 | Thermostable biaxially oriented polypropylene film adapted for high power capacitor and its making method |
| JP2005171230A (en) * | 2003-11-05 | 2005-06-30 | Toray Ind Inc | Biaxially oriented microporous film and method for producing the same |
-
2012
- 2012-03-09 CN CN2012100604661A patent/CN102543425A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440041A (en) * | 2002-08-08 | 2003-09-03 | 江苏南天集团股份有限公司 | High temperature resistant polypropylene capactive film and production thereof |
| JP2005171230A (en) * | 2003-11-05 | 2005-06-30 | Toray Ind Inc | Biaxially oriented microporous film and method for producing the same |
| CN1631652A (en) * | 2004-12-31 | 2005-06-29 | 浙江南洋电子薄膜有限公司 | Thermostable biaxially oriented polypropylene film adapted for high power capacitor and its making method |
Non-Patent Citations (2)
| Title |
|---|
| 张瑾瑾: "平膜法双向拉伸聚丙烯制造设备综述", 《塑料工业》 * |
| 谭耀新: "双轴拉伸聚丙烯薄膜的加工和应用", 《现代塑料加工应用》 * |
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Address after: 226500 Rugao City, Nantong Province, such as the town of Tea Road, No. 69, No. Applicant after: NANTONG BISON ELECTRONIC NEW MATERIAL CORP. LTD. Address before: 226500 Rugao City, Nantong Province, such as the town of Tea Road, No. 69, No. Applicant before: Nangtong Bison Electronic New Material Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: NANGTONG BISON ELECTRONIC NEW MATERIAL LTD. TO: NANGTONG BISON ELECTRONIC NEW MATERIAL CO., LTD. |
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Application publication date: 20120704 |