Thermoset resin impregnated web and process of making
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United States of America Patent
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Aug 25, 1981
Grant Date -
N/A
app pub date -
Feb 6, 1980
filing date -
Feb 6, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Battery separators, filters and other porous semi-rigid products are provided by a thermoset resin impregnated fibrous web containing cellulosic fiber, synthetic wood pulp, paper making staple long fiber and thermoset resin. The temperature for thermosetting can exceed the Vicat softening and even the melting temperature of the synthetic pulp without the loss of the flexibilizing effect of the synthetic pulp. By extension the teaching reaches to non-fibrous and non-porous materials. A process is also revealed.
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