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PTFE wrap film and production method thereof

A production method, PTFE technology, applied in the field of polymer material preparation, can solve the problems of micropore pore size distribution, thickness, density unevenness, etc.

Inactive Publication Date: 2020-09-29
常州福升新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The PTFE microporous membrane prepared in the prior art has problems of uneven pore size distribution, thickness, and density, which lead to many adverse problems in subsequent application industries

Method used

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  • PTFE wrap film and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0064] The present embodiment provides a kind of production method of PTFE wrapping film, specifically comprises the following steps:

[0065] Screening and mixing of raw materials: Use 8-10 mesh sieves to screen PTFE raw materials to remove agglomerates; add organic solvent to the screened PTFE raw materials, and stir and mix to obtain a mixture; PTFE raw materials and organic solvents The mass ratio is 100:24; the organic solvent is Isopar-M produced by Exxon-Mobil, and it is stirred by hand for 2 to 10 minutes;

[0066] Maturation: put the mixture at 50℃ for 16 hours;

[0067] Sieving and pre-forming: vibrate the matured mixture, then sieve and remove agglomerates; put the sieved and agglomerated mixture into a mold for pre-forming treatment by pressing to obtain a pre-formed product ; The pre-forming pressure is 3MPa, the pushing speed is below 50 mm / min; the pressure is maintained for 5 minutes after reaching the pre-forming pressure, and the compression ratio is 60;

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Abstract

The invention relates to a PTFE wrap film and a production method thereof. The production method of the PTFE wrap film comprises the following steps of raw material sieving, mixing, curing, sieving, preforming, extrusion, constant-temperature treatment, calendaring, drying, longitudinal extending, and heat setting and film formation. The invention further provides the PTFE wrap film produced through the method. The production method provided by the invention has the good processability. The prepared PTFE wrap film has the advantages of uniform micropore diameter and uniform density and thickness.

Description

technical field [0001] The invention relates to a PTFE wrapping film and a production method thereof, belonging to the technical field of polymer material preparation. Background technique [0002] The production of PTFE microporous membrane is to take advantage of the excellent heat resistance, weather resistance, chemical resistance and other characteristics of PTFE resin, stretch within the range of the process temperature to form micropores, and finally cure and shape at high temperature to become a viable membrane. Breathable and impermeable PTFE microporous membrane; because PTFE microporous membrane is the most corrosion-resistant, high-temperature-resistant, and chemical-resistant organic film at present, it is widely used in modern chemical, pharmaceutical, food, medical, semiconductor and other industries. The need for enrichment, purification, separation, etc., has an urgent need for membrane separation technology. Therefore, there will be a huge market for applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C35/04B29C35/08B29B11/06B29K27/18B29L7/00
CPCB29C35/045B29C35/0805B29B11/06B29K2027/18B29C2035/0822B29L2007/00
Inventor 赵景鑫
Owner 常州福升新材料科技有限公司
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