HIGH IMPACT STRENGTH, FIRE RESISTANT WOVEN ARTICLE
A woven article having strands of polyetherimide (PEI) fiber or organic fibers (cyclic polyolefin) and strands of inextensible, heat resistant fiber is disclosed. Preferably warp and weft fibers of PEI are provided wherein said fibers bond together when heated. By using a multiplicity of PEI fibers, heating and compressing the woven article will produce a sheet-like surface on at least one side thereof.
1 .- 22 . (canceled)
23 . A three-dimensional article, comprising:
(a) a woven fabric having at least one yarn strand in the warp or in the weft of the fabric, selected from the group consisting of high glass transition temperature (T g ) amorphous polyetherimides (PEI) yarns and cyclic polyolefin yarns, wherein at least 10% by weight of the yarns in the fabric are polymeric yarns, and quartz yarns in the warp or the weft of the fabric; and
(b) the woven fabric has been formed by the application of heat and pressure into a three-dimensional article, without pre-impregnation or the addition of molding resin, wherein the polymeric yarns have been melted and bonded together.
24 . The article of claim 23 , wherein at least 10% by weight of the yarns in the fabric are PEI.
25 . The article of claim 23 , wherein the quartz yarns are in both the warp and weft of the fabric.
26 . The article of claim 23 , wherein the polymeric yarns are in both the warp and weft of the fabric and are heat bonded to each other where the polymeric yarns intersect, after the application of heat and pressure to the fabric.
27 . The article of claim 23 , wherein the polymeric yarns flow together to form a sheet-like face on one side of the fabric, after the application of heat and pressure to the fabric.
28 . The article of claim 27 , wherein from 10% to 65% by weight of the yarns in the fabric are PEI.
29 . The article of claim 23 , wherein from 10% to 65% by weight of the yarns in the fabric are PEI, and the balance of the yarns are quartz.
30 . A formed, woven article comprising:
(a) at least one strand in the warp and in the weft yarns selected from the group of polymeric yarns consisting of high glass transition temperature (Tg) amorphous polyetherimides (PEI) yarns and cyclic polyolefin, at least 10% by weight of the yarns being polymeric yarns;
(b) the balance of said yarns comprising a heat resistant, inextensible, dimensionally stable, material selected from the group consisting of glass, quartz, basalt, and carbon fibers; and,
(c) said article being formed by the application of heat and pressure into a three-dimensional product without pre-impregnation or additional molding resin, said polymeric yarns being melted and having flowed together under said heat and pressure, and bonded at their intersections.
31 . The article of claim 30 wherein at least 10% by weight of the yarns in the woven article are PEI yarn.
32 . The article of claim 30 wherein from 10% to 65% by weight of the yarns are PEI.
33 . The article of claim 30 wherein the article is a multi-ply article.
34 . The article of claim 30 wherein the warp yarn comprises fiberglass and the weft yarn comprises PEI.
35 . The article of claim 30 wherein the warp yarn comprises fiberglass and the weft yarn comprises a cyclic polyolefin.
36 . A composite yarn comprising a core of an inextensible mineral fiber with yarn of PEI fiber and cyclic polyolefin fiber as a wrapper around the core.
37 . A fabric woven with the yarn of claim 36 .
38 . The fabric of claim 37 , wherein the core of the composite yarn is quarts, and the wrapper around the core is a yarn of PEI fiber.