Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1995-03-15
1998-05-26
Ryan, Patrick
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428372, 428375, 428377, 428378, 428373, 428392, 428394, 428395, B32B 900
Patent
active
057562067
ABSTRACT:
A method for producing flexible, low-bulk towpreg which involves powder coating a bundle of unspread fiber tows arranged in a predetermined cross-sectional shape, and the resulting towpreg. During the powder coating process, the resin powder particles do not enter into the fiber bundle, but rather only coat the surface fibers comprising the tows, resulting in dry fibers in the core of the towpreg and outer fibers which are coated with a discontinuous sheath of resin on the surface of the towpreg surrounding the core of dry fibers. The resin layer on the surface of the towpreg is formed by a partial melting of the powder particles. A post treatment process can be used to convert flat ribbon towpreg produced in accordance with the present invention into flexible unidirectional tape.
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Davies Robert M.
Ramasamy Alagirusamy
Custom Composite Materials, Inc.
Gray J. M.
Ryan Patrick
LandOfFree
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