Low resin content unidirectional fiber tape

Details Low resin content unidirectional fiber tape Low resin content unidirectional fiber tape

1994-11-22

1996-03-05

Withers, James D.

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

Halogen containing compound

428294, 428902, A61F 1302, D04H 302

Patent

active

054966027

ABSTRACT:
A low resin content unidirectional fiber tape is disclosed for use in incorporating unidirectional fibers in dry fiber preform for use in a resin transfer molding process. A plurality of unidirectional fibers are located between a pair of thin flexible resin films which hold the fibers together without significant infiltration into the fibers. The films also have sufficient adhesiveness to maintain contact with a release layer but are not so adhesive that they do not prevent removal of the unidirectional tape with hand pressure. Preferably the total resin content of the films is from 1% to 20%, preferably 3% to 15% by weight relative to the total resin and fiber weight. At such a level, the tape is capable of being handled by a preform assembler and draped over contoured surfaces without distortion or separation of the unidirectional fibers. In addition, the low resin content allows for later infiltration of an injection resin into the interstices between the fibers, for full integration of the unidirectional fibers into the ultimate part.

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patent: 5057353 (1991-10-01), Maranci et al.
patent: 5204033 (1993-04-01), Pearce et al.

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