Abstract: A flexible article of manufacture especially suitable for use as a ballistic resistant body armor which comprises at least one substrate, said layers being a fibrous layer, and at least one layer having a plurality of metallic bodies sewn to at least one surface of said substrate layer.

Abstract: An improved article of the type comprising a plurality of flexible fibrous layers at least two of which are secured together by a securing means, said improvements comprising a securing means which comprises at least two adjacent paths wherein the distance between said paths is less than about 1/8 in.

Abstract: The present invention is a flexible impact resistant article comprising a plurality of prepreg packets. Each prepreg packet comprises at least about 2 prepreg layers. Each prepreg layer comprises a plurality of coplanar fibers embedded in a polymeric matrix. There is a means to maintain at least a portion of each prepreg packet in successive layers. The prepreg packets are unattached to each other over a portion of their adjacent areas, preferably over a substantial portion of their adjacent areas. The plurality of packets results in improved flexibility.

Abstract: This invention relates to a fire retardant compound comprising at least one fibrous layer comprising a network of fibers such as high strength polyethylene or aramid fibers in a matrix such as a blend of a vinyl ester and a polyurethane, and a fire retardant layer comprised of a particulate fire retardant material which decompose an heating to a gaseous material such as magesium hydroxide dispersed in a matrix comprised of relatively high char yield resin such as cured phenolic cyanate resin.

Abstract: The present invention provides an improved composite which comprises one or more layers, at least one of said layers comprising network of high strength filaments having a tensile modulus of at least about 160 grams/denier, a tenacity of at least about 7 g/denier and an energy-to-break of at least about 8 joules/gram in a matrix material, the ratio of the thickness of said layer to the equivalent diameter of said filaments is equal to or less than about 12.8, and complex composite articles formed from said composite.

Abstract: A device for forming a resin impregnated unidirectional fiber reinforced prepreg where the resin impregnated fiber web is supported by a single endless conveyor belt. The device includes a pair of pull rolls which exert force directly and longitudinally onto the conveyor belt and the web.

Abstract: A network of non-porous polyethylene fibers substantially free of voids formed by preparing a network of gel spun fibers, applying pressure to the network at a temperature and pressure and for a time adequate to form a translucent film substantially free of voids.

Abstract: The present invention is a cyanato group containing phenolic resin, and to phenolic triazine resins derived therefrom. The resin of the present invention is stable and has a long shelf life. This is indicated by the gel time of greater than 3 minutes and by a shelf life equal to or greater than 3 days.

Abstract: Phenolic cyanate/phenolic triazine copolymers and cured resins prepared therefrom.

Abstract: A coated web or composite having improved flexibility. The coated web of the present invention comprises at least one layer and preferably at least two layers. The layers comprise a fibrous web located or embedded with polymeric composition. The coated web is flexed sufficiently over at least a portion of the web surface to have improved flexibility properties. The web can be flexed in a single direction along the surface or randomly along the whole surface. Preferably, the web is flexed sufficiently to form a plurality of permanent creases or wrinkles. The coated web has improved flexibility, and at the same time, impact resistant properties, such as ballistic resistance, are substantially maintained compared to an unflexed web.

Abstract: The present invention is a cyanato group containing phenolic resin of the formula: ##STR1## wherein n is 0 or an integer of one or more, and R is the same or different and is selected from the group consisting of hydrogen and methyl radicals. The advancement over the art is that the resin of the present invention is stable and has a long shelf life. This is indicated by the gel time of greater than 1 minute, preferably greater than 2 minutes, more preferably greater than 10 minutes, and most preferably greater than 20 minutes at 155.degree. C. Alternately, the improved resin of the present invention can be characterized as having a thermal stability indicated by thermal decomposition temperature of at least 400.degree. C. and preferably of at least 450.degree. C. as measured by Thermal Gravimetric Analysis (TGA).

Abstract: A process for forming mixtures of short fibers of varying lengths, diameters and aspect ratios composed of an anisotropic polymer.

Abstract: A method of making a composite of a unidirectional fibrous web in a polymer matrix composition by nonuniformly feeding a polymer composition into contact with a unidirectional fibrous web into a gap between two adjacent compression surfaces with at least one of the surfaces having a pattern. This results in the polymer becoming nonuniformly distributed into thick areas and thin areas as a matrix for the fibrous web.

Abstract: The present invention is a composite comprising a fibrous web and a matrix composition nonuniformly distributed in the major plane of a fibrous web.

Abstract: The present invention is flame resistant article and related method, made of phenolic triazine resin derived from a cyanato group containing phenolic resin of the formula: ##STR1## wherein: n is a positive whole number greater than or equal to 1;q and r are the same or different at each occurrence and are whole numbers from 0 to 3, with the proviso that the sum of q and r at each occurrence is equal to 3;Z is --CN, or hydrogen and --CN;o and p are the same or different at each occurrence and are whole numbers from 0 to 4 with the proviso that the sum of o and p at each occurrence is equal to 4;--X-- is a divalent organic radical; andR.sub.3 is the same or different at each occurrence and is a substituent other than hydrogen which is unreactive under conditions necessary to completely cure the copolymer.

Abstract: The present invention relates to high strength, high modulus polyethylene filaments which form composites having improved shear strength and composites formed from said filaments.

Abstract: The present invention is a cyanato group containing phenolic resin of the formula: ##STR1## wherein n is 0 or an integer of one or more, and R is the same or different and is selected from the group consisting of hydrogen and methyl radicals. The advancement over the art is that the resin of the present invention is stable and has a long shelf life. This is indicated by the gel time of greater than 1 minute, preferably greater than 2 minutes, more preferably greater than 10 minutes, and most preferably greater than 20 minutes at 155.degree. C. Alternately, the improved resin of the present invention can be characterized as having a thermal stability indicated by thermal decomposition temperature of at least 400.degree. C. and preferably of at least 450.degree. C. as measured by Thermal Gravimetric Analysis (TGA).

Abstract: The present invention is flame resistant article and related method, made of phenolic triazine resin derived from a cyanato group containing phenolic resin of the formula: ##STR1## wherein: n is a positive whole number greater than or equal to 1;q and r are the same or different at each occurrence and are whole numbers from 0 to 3, with the proviso that the sum of q and r at each occurrence is equal to 3;Z is --CN, or hydrogen and --CN;o and p are the same or different at each occurrence and are whole numbers from 0 to 4 with the proviso that the sum of o and p at each occurrence is equal to 4;--X-- is a divalent organic radical; andR.sub.3 is the same or different at each occurrence and is a substituent other than hydrogen which is unreactive under conditions necessary to completely cure the copolymer.

Abstract: This invention relates to mixtures of short fibers of varying lengths, diameters and aspect ratios composed of an anisotropic polymer, to compositions containing said fibers and one or more thermoplastic or thermoset resins, and to a process for forming said mixtures.

Abstract: The present invention is a cyanato group containing phenolic resin, and method to prepare the resin. The resin of the present invention is stable and has a long shelf life. This is indicated by the gel time of greater than 1 minute, preferably greater than 2 minutes, more preferably greater than 10 minutes. The resin has substantially no smoke generation during gel time measurement at 155.degree. C.