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Polytetrafluoroethylene membrane and preparation method thereof

A technology of polytetrafluoroethylene film and polytetrafluoroethylene, which is applied in the field of textile fabrics, can solve the problem of unsatisfactory micropore size, void ratio and film strength, poor wear resistance of polytetrafluoroethylene film, and microporous filtration. Membranes are difficult to solve and other problems, to achieve the effect of improving physical and mechanical properties, simple process, and reducing water absorption

Inactive Publication Date: 2020-01-17
NINGBO CHAOYUE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insoluble characteristics of polytetrafluoroethylene make it difficult to solve the technology of manufacturing its microporous membrane for a long time, which limits its application and development.
[0004] In the 1960s, the DuPont company of the United States first used the method of uniaxial stretching to make polytetrafluoroethylene microporous film, but the size of the micropore, the porosity and the strength of the film were not ideal.
The biaxial stretching process of PTFE film makes the film have good void characteristics, but at the same time it also makes the wear resistance of PTFE film worse

Method used

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  • Polytetrafluoroethylene membrane and preparation method thereof
  • Polytetrafluoroethylene membrane and preparation method thereof
  • Polytetrafluoroethylene membrane and preparation method thereof

Examples

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Embodiment 2-5

[0059] In Examples 2-5, the components and component contents of the polytetrafluoroethylene film were adjusted on the basis of the method in Example 1, and the specific adjustment methods are shown in Table 1 below.

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Abstract

The invention discloses a polytetrafluoroethylene membrane and a preparation method thereof. The polytetrafluoroethylene membrane is prepared from the following raw material components in parts by weight: 75-95 parts of polytetrafluoroethylene powder, 5-10 parts of polyformaldehyde, 15-20 parts of polyacrylamide, 6-10 parts of silicon dioxide, 3-6 parts of aluminum oxide, 7-12 parts of dioctyl phthalate, 22-34 parts of ethylene-vinyl acetate copolymer, 2-3 parts of lithium iodide and 2-4 parts of auxiliary oil. The preparation method of the polytetrafluoroethylene membrane comprises the following steps of A, mixing; B, forming bar blank; C, calendaring; D, drying; E, longitudinally stretching; F, relaxing, G, transversely stretching; and H, sintering and shaping. Through the preparation method disclosed by the invention, the polytetrafluoroethylene membrane has better wear resistance.

Description

technical field [0001] The invention relates to the technical field of textile fabrics, in particular to a polytetrafluoroethylene film and a preparation method thereof. Background technique [0002] Polytetrafluoroethylene, abbreviated as teflon, is generally called "non-stick coating" or "easy-to-clean material. This material has the characteristics of acid and alkali resistance, and various organic solvent resistance, and is almost insoluble in all solvents. [0003] It has long been noticed that the outstanding properties of polytetrafluoroethylene in polymer materials, such as excellent high and low temperature performance, outstanding chemical stability, and good dielectric properties, are ideal materials for particle separation membranes under some harsh conditions. . However, the insoluble characteristics of polytetrafluoroethylene make the technology of manufacturing its microporous membrane difficult to solve for a long time, which limits its application and devel...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L59/00C08L33/26C08L23/08C08K13/02C08K3/36C08K3/22C08K5/12C08K3/16C08J5/18B29C69/00B29C48/06B29C43/24B29C37/00B29C55/14B29C67/04
CPCB29C37/0092B29C43/24B29C55/143B29C67/04B29C48/0011B29C48/06C08J5/18C08J2327/18C08J2423/08C08J2433/26C08J2459/00C08K3/16C08K3/36C08K5/12C08K13/02C08K2003/2227
Inventor 周建江周鸿彬叶林江
Owner NINGBO CHAOYUE NEW MATERIAL TECH