Glass fibers having fumed silica coating
AssigneeOwens Corning Fiberglas Technology, Inc.
InventorsChristopher M. Hawkins, Robert A. Schweizer
Life of this patent
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Abstract
A composite having enhanced flame retardant behavior includes a polymer and glass fibers coated with fumed silica. The composite can be based on a wide variety of polymers such as polybutylene and polyethylene terephthalates, polycarbonates, polyethylenes, polypropylenes and nylons. The glass fibers are also preferably coated with fibrillar polytetrafluoroethylene.
Claims13
A flame-retardant fiber-reinforced composite comprising:
- a matrix material comprising a polymer;
- and
- glass fibers having a coating comprising fumed silica thereon forming coated glass fibers, wherein the glass fibers have an average length between about 3 mm and about 130 mm and an average diameter between about 7 microns and about 25 microns.
A flame-retardant fiber-reinforced composite comprising from about 65% to about 75% by weight polybutylene terephthalate as a matrix material and from about 25% to to about 35% by weight of coated glass fibers, said coated glass fibers comprising fibers of a glass material and a coating thereon comprising fumed silica and fibrillar polytetrafluoroethylene, wherein the fibers have an average length between about 3 mm and about 6 mm and an average diameter between about 10 microns and about 14 microns, the timed silica is present in an amount of from about 1% to about 6% by weight of the fibers, and the fibrillar polytetrafluoroethylene is present in an amount of from about 0.05% to about 1% by weight of the composite.
Dependencies are inferred from the claim text.