Porous sheets and method of manufacture
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United States of America Patent
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Mar 17, 1981
Grant Date -
N/A
app pub date -
Feb 15, 1979
filing date -
Feb 15, 1979
priority date (Note) -
Expired
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Abstract
A porous thermoplastic sheet is formed by adding a material to a polymer latex to passivate the aqueous phase of the latex. An additional material of a preselected particle size, corresponding to the desired pore size of the final product is then added. The latex composition is gelled and is then formed into a sheet. The sheet is dried and cured or sintered and the solubles are extracted therefrom with a solvent. A preferred polymer latex is PTFE.
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