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Bonding method for polytetrafluoroethylene cellular material

A technology of polytetrafluoroethylene and microporous materials, which is applied in chemical instruments and methods, layered products, lamination devices, etc., to achieve the effect of low cost and simple process

Active Publication Date: 2014-08-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method is mostly adhesive bonding, so that the final material will sacrifice some of the characteristics of the PTFE material itself

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Polytetrafluoroethylene microporous film: Mix F106 polytetrafluoroethylene resin powder and aviation kerosene (the weight ratio of polytetrafluoroethylene resin powder to aviation kerosene is 1:0.2) from Daikin Company, Japan, and mix them evenly at 20 °C. Stand still at a temperature of 96 hours, and then stand at a temperature of 40°C for 10 hours to fully mix the resin powder and aviation kerosene to form a polytetrafluoroethylene material; put the polytetrafluoroethylene material at 20°C, Press the blank into a cylindrical blank on a compactor, extrude the blank into a rod at a temperature of 40°C through a pusher, and then roll it into a polytetrafluoroethylene base tape at a temperature of 40°C through a calender; the polytetrafluoroethylene The base tape is stretched 5 times longitudinally in an oven at 220°C to obtain a polytetrafluoroethylene microporous film with a thickness of 5 microns. The weight ratio is 1:0.03;

[0021] (2) Bonding between polytetraf...

Embodiment 2

[0023] (1) Polytetrafluoroethylene microporous film: Mix 188 polytetrafluoroethylene resin powder produced by Zhejiang Juhua Group and aviation kerosene (the weight ratio of polytetrafluoroethylene resin powder to aviation kerosene is 1:0.28). Stand still at a temperature of 40°C for 144 hours, then stand at a temperature of 80°C for 16 hours to fully mix the resin powder and aviation kerosene to form a polytetrafluoroethylene material; put the polytetrafluoroethylene material at 30°C Press the blank into a cylindrical blank on a compacting machine, extrude the blank into a rod at a temperature of 60°C through a pusher, and then roll it into a polytetrafluoroethylene base tape at a temperature of 60°C through a calender; the polytetrafluoroethylene The fluoroethylene base tape is longitudinally stretched 2 times in an oven at 180°C to obtain a PTFE microporous film with a thickness of 80 microns. The PTFE microporous film contains part of aviation kerosene, and PTFE resin powde...

Embodiment 3

[0026] (1) Polytetrafluoroethylene microporous film: Mix 188 polytetrafluoroethylene resin powder produced by Zhejiang Juhua Group and aviation kerosene (the weight ratio of polytetrafluoroethylene resin powder to aviation kerosene is 1:0.22). Stand still at a temperature of 30°C for 120 hours, and then stand at a temperature of 60°C for 12 hours to fully mix the resin powder and aviation kerosene to form a polytetrafluoroethylene material; put the polytetrafluoroethylene material at 25°C Press the blank into a cylindrical blank on a compacting machine, extrude the blank into a rod at a temperature of 50°C through a pusher, and then roll it into a polytetrafluoroethylene base tape at a temperature of 50°C through a calender; the polytetrafluoroethylene The fluoroethylene base tape is longitudinally stretched 3 times in an oven at 200 ° C to obtain a polytetrafluoroethylene microporous film with a thickness of 50 microns. The polytetrafluoroethylene microporous film contains par...

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Abstract

The invention discloses a bonding method for a polytetrafluoroethylene cellular material, which comprises mixing polytetrafluoroethylene resin powder and aviation kerosene and preparing a polytetrafluoroethylene cellular thin film through procedures of extrusion, calendering, longitudinal extension and the like; and wrapping the polytetrafluoroethylene cellular thin film or multiple layers of polytetrafluoroethylene cellular thin films on the outer side of a polytetrafluoroethylene hollow fiber film, and obtaining the polytetrafluoroethylene cellular material through hot pressing at the high temperature. The bonding method for the polytetrafluoroethylene cellular material does not use adhesive, can ensure a final material to be 100% of polytetrafluoroethylene, and can not change the physical property of the material. The bonding method is simple in process and low in cost, and not only can be used for bonding the polytetrafluoroethylene cellular thin films, but also can be used for wrapping the polytetrafluoroethylene cellular thin films on the polytetrafluoroethylene hollow fiber film.

Description

technical field [0001] The invention relates to a preparation method of a polymer material, in particular to a bonding method of a polytetrafluoroethylene microporous material. Background technique [0002] PTFE microporous materials can be processed by stretching PTFE resin, and can be processed into thin film, hollow fiber membrane and other shapes by using different equipment and processes. PTFE material has the characteristics of waterproof, high temperature resistance, acid and alkali resistance, and corrosion resistance. At the same time, the PTFE microporous material processed by stretching method has the characteristics of developed porosity, easy control of micropore size, and low apparent density. Therefore, PTFE microporous materials are widely used as waterproof and moisture-permeable fabrics, air filter materials, water filter materials, sealing materials, etc. [0003] When used as a waterproof and breathable fabric, one of the important indicators is water pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10
Inventor 郭玉海朱海霖张华鹏王峰陈建勇
Owner ZHEJIANG SCI-TECH UNIV