Papermaking process and composition for the production of tridimensional products containing thermoplastics resin and reinforcing fibers
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United States of America Patent
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May 29, 1990
Grant Date -
N/A
app pub date -
Sep 24, 1987
filing date -
Sep 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The process for producing a tridimensional piece from an aqueous suspension containing at least a thermoplastic resin and reinforcing fibers, comprises the following steps: (a) the elements of the suspension are wet-molded into a preform in a mold, said preform having, in the three dimensions, the general outline of the final piece; (b) the preform is then at least partly de-watered; (c) then the preform is pre-heated to a temperature higher than the melting point of the thermoplastic resin; (d) the preform is then molded under pressure into its final shape in a press heated to a temperature below the melting point of the thermoplastic resin.
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