Thermoplastic Fiber Material Spun from a Raw Material Containing Polyhydroxyether, Methods for Its Production and Uses for It
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Abstract
The invention describes a new synthetic fiber material of polyhydroxyether, as well as a melt-spinning method for its production. The new material can be used, in particular, for stabilization of the reinforcement fibers of high-performance fiber composite materials before they are embedded in the matrix material. During this usage, the polyhydroxyether fiber material dissolves at a temperature above its glass transition temperature entirely in the matrix material, so that the reinforcement fibers can be arranged largely free of kinking. In addition, it forms cross-links with the matrix material to form a homogeneous matrix and thus does not constitute a disruptive third phase in the composite material. The compatibility of the matrix and reinforcement fiber is also improved. It was possible to improve the bending strength of test slabs by 12% as compared to that of reference slabs with polyester filament.
7 Citations
44 Claims
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1-24. -24. (canceled)
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25. A method for making structural parts with reinforcement fibers embedded in a matrix material consisting of a cross-linkable resin system, comprising the steps:
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a) providing the reinforcement fibers and a thermoplastic fiber material; b) securing the reinforcement fibers with the thermoplastic fiber material in a defined geometrical arrangement to form a preform, wherein the thermoplastic fiber material is spun from a raw material containing polyhydroxyether as a single polymer, and wherein the polyhydroxyether has an essential amorphous structure, a molecular weight Mw of 10,000 to 80,000 Dalton, and a glass transition temperature Tg of no more than 100°
C.;c) embedding the reinforcement fibers and the thermoplastic fiber material in the matrix material by injection of the matrix material into the preform; and d) hardening the cross-linkable resin system, causing the thermoplastic fiber material to dissolve in the matrix material. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification