MANUFACTURING METHOD OF UNIAXIALLY DRAWN POROUS POLYTETRAFLUOROETHYLENE MEMBRANE
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United States of America Patent
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Issued Date -
Apr 12, 2007
app pub date -
Oct 12, 2005
filing date -
Oct 12, 2005
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Abandoned
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Abstract
A manufacturing method of uniaxially drawn porous polytetrafluoroethylene membrane is to process a semifinished product of polytetrafluoroethylene membrane after a corona treatment with an extension procedure and a shaping procedure to obtain finished porous membrane having uniform thickness, pore distribution, pore size and pore-space rate. By having the procedures and controlling the operational conditions in the manufacturing method, the finished porous membrane has excellent ventilation, moisture-permeability, and water-repellence efficiency. Moreover, the manufacturing method has simple produces without using accessory devices to reduce cost and to increase throughput as well. The finished membrane enables to apply on fabric, non-fabric, cloth or the similar for industrial applications.
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