Process for resin impregnation of a fibrous substrate

Details Process for resin impregnation of a fibrous substrate Process for resin impregnation of a fibrous substrate

1995-04-05

1995-12-26

Beck, Shrive

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

427345, 427356, 427428, 118104, 118204, 118244, 118261, B05D 128

Patent

active

054785995

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.

REFERENCES:
patent: 2252345 (1941-08-01), Johnson
patent: 2534320 (1950-12-01), Taylor
patent: 3354867 (1967-11-01), Pomper et al.
patent: 4478869 (1984-10-01), Brady et al.
patent: 4657783 (1987-04-01), Tatt et al.
Encyclopedia of Chemical Technology, 3rd ed., "Coating Processes", pp. 386-426, 1979.

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