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Dry powder process for preparing uni-tape prepreg from polymer powder coated filamentary towpregs
Dry powder process for preparing uni-tape prepreg from polymer powder coated filamentary towpregs
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机译:由聚合物粉末涂覆的丝状丝束预浸料制备单带预浸料的干粉工艺
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摘要
A process for preparing uni-tape prepreg from polymer powder coated filamentary towpregs is provided. A plurality of polymer powder coated filamentary towpregs are provided. The towpregs are collimated so that each towpreg is parallel. A material is applied to each side of the towpreg to form a sandwich. The sandwich is heated to a temperature wherein the polymer flows and intimately contacts the filaments and pressure is repeatedly applied perpendicularly to the sandwich with a longitudinal oscillating action wherein the filaments move apart and the polymer wets the filaments forming a uni-tape prepreg. The uni-tape prepreg is subsequently cooled.
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