Abstract: Fiber reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus, reinforcing fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the reinforcing fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the reinforcing fibers has a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

Abstract: Fiber reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus, reinforcing fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the reinforcing fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the reinforcing fibers has a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

Abstract: Fiber-reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the high modulus fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the high modulus fibers have a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

Abstract: Fiber-reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the high modulus fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the high modulus fibers have a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

Abstract: Fiber-reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the high modulus fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the high modulus fibers have a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

Abstract: An improved flexible towpreg tape of a known geometry and a method of production therefor. The improved flexible towpreg tape is formed from a plurality of reinforcing filaments fusion coated with matrix forming material, the reinforcing filaments being substantially wet-out by the matrix forming material, and the towpreg tape having multiple plies with an average thickness less than about 100 microns. The method of production for the improved flexible towpreg tape includes the steps of coating the reinforcing filaments with the matrix forming material in a manner causing interfacial adhesion of the matrix forming material to the reinforcing filaments; forming a towpreg by heating the matrix forming material contacting the reinforcing filaments until the matrix forming material liquefies and coats the reinforcing filaments; and forming the towpreg tape under pressure and elevated temperature in a means for creating a known tape geometry.

Abstract: An improved flexible towpreg article and a method of production therefor. The improved flexible towpreg article comprises a prepreg which comprises reinforcing filaments and matrix forming material comprising recycled plastics; the reinforcing filaments being substantially wetout by the matrix forming material such that the towpreg plies have a low void content compared to the multiply towpreg.

Abstract: An improved flexible towpreg article and a method of production therefor. The improved flexible towpreg article comprises a prepreg which comprises reinforcing filaments and matrix forming material comprising recycled plastics; the reinforcing filaments being substantially wetout by the matrix forming material such that the towpreg plies have a low void content compared to the multiply towpreg.

Abstract: An improved flexible towpreg tape of a known geometry and a method of production therefor. The improved flexible towpreg tape is formed from a plurality of reinforcing filaments fusion coated with matrix forming material, the reinforcing filaments being substantially wet-out by the matrix forming material, and the towpreg tape having multiple plies with an average thickness less than about 100 microns. The method of production for the improved flexible towpreg tape includes the steps of coating the reinforcing filaments with the matrix forming material in a manner causing interfacial adhesion of the matrix forming material to the reinforcing filaments; forming a towpreg by heating the matrix forming material contacting the reinforcing filaments until the matrix forming material liquefies and coats the reinforcing filaments; and forming the towpreg tape under pressure and elevated temperature in a means for creating a known tape geometry.

Abstract: A non-woven towpreg fabric and a method of production therefor. The non-woven towpreg fabric is fabricated from a plurality of flexible, multiply towpregs, comprising towpreg plies which comprise reinforcing filaments substantially wetout by a matrix forming material, which then are bonded together to form the fabric. The method of production for the non-woven towpreg fabric involves spreading the reinforcing filaments, coating the reinforcing filaments with the matrix forming material in a manner causing interfacial adhesion, forming the towpreg plies by heating the matrix forming material until the matrix forming material liquefies and coats the reinforcing filaments, cooling the towpreg plies in a manner while said towpregs remain substantially unconsolidated until the matrix forming material solidifies, overlapping a plurality of the towpreg plies, and bonding the towpreg plies together. Multidimensional fabrics, preforms and composite articles also can be formed by this invention.

Abstract: This invention relates to an improved flexible towpreg and a method of production therefor. The improved flexible towpreg comprises a plurality of towpreg plies which comprise reinforcing filaments and matrix forming material; the reinforcing filaments being substantially wetout by the matrix forming material such that the towpreg plies are substantially void-free composite articles, and the towpreg plies having an average thickness less than about 100 microns.

Abstract: This invention relates to an improved flexible towpreg and a method of production therefor. The improved flexible towpreg comprises a plurality of towpreg plies which comprise reinforcing filaments and matrix forming material; the reinforcing filaments being substantially wetout by the matrix forming material such that the towpreg plies are substantially void-free composite articles, and the towpreg plies having an average thickness less than about 100 microns.

Abstract: A bone fracture fixation device for fixation to a fractured bone is substantially free from resorbable materials and materials which soften on exposure to body fluids, and undergoes a gradual decrease in rigidity over the healing period of the fracture.

Abstract: A process for the delignification of cellulosic materials, wherein a high-yield cellulose pulp and high-value by-product, such as reactive lignins of low molecular weight are produced, which comprises degassing lignocellulosic material, rapidly heating the lignocellulosic material in a liquor comprising water, an organic solvent and a buffer thereby maintaining a substantially neutral solvent extraction, such that said lignocellulosic material is cooked in the liquor as it is heated from a temperature of 150.degree. C. to a selected maximum temperature in the range of 200.degree. to 280.degree. C.; and rapidly cooling the mixture to a temperature less than 150.degree. C. The reaction is controlled to maximize reactive lignin solvation while suppressing cellulose degradation.

Abstract: Novel purine compounds substituted with either fluorine or trimethylammonium are useful as adhesives or continuous and non-continuous coatings and are prepared by a novel process.