Process for resin impregnation of a fibrous substrate
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United States of America Patent
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-
Dec 26, 1995
Issued Date -
N/A
app pub date -
Apr 5, 1995
filing date -
Dec 29, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is described for minimizing resin waste in the impregnation of a fibrous substrate with a thermosettable resin. The process involves the use of resin application means comprising a rotatable roller on which is deposited a liquid-form thermosettable resin; passing a fibrous substrate in countercurrent contact with the thermosettable resin on the rotating roller so as to transfer the thermosettable resin to the fibrous substrate; removing any untransferred resin from the rotating roller and depositing the removed resin onto the fibrous substrate prior to contact thereof with the rotating roller; and passing the resin-containing fibrous web to a heating zone to partially cure the resin. The process is particularly suited for application of a solventless resin formulation to a glass web in the preparation of a prepreg for an electrical laminate.
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