Method of continuously vacuum impregnating fibrous sheet material
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United States of America Patent
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Aug 30, 1988
Grant Date -
N/A
app pub date -
Jul 22, 1986
filing date -
Jul 22, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A void-free prepreg is made by contacting a porous sheet material with a resin so that resin enters the sheet, providing a subatmospheric pressure on one side of the resin-containing sheet to draw resin through the sheet, and then B-staging the resin-containing sheet.
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