STACKED MATERIAL FOR FORMING COMPOSITE MATERIAL
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United States of America Patent
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app pub date -
Apr 7, 2016
filing date -
Apr 14, 2015
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Abstract
A laminate for forming a composite material is provided. The laminate has a structure in that unidirectional yarn sheets S in which yarns are arranged in parallel to each other in one direction without bending and thermoplastic resin films F are alternately stacked so that the film F is located between the unidirectional yarn sheets S. The yarn sheets S and the films F having a degree of crystallinity XC of 30% or less are integrally coupled by stitching yarn Y, and adjacent unidirectional yarn sheets S are obliquely stacked at an angle of ±1° to ±90° to a direction in which yarns included in the respective unidirectional yarn sheets S are arranged. The use of unidirectional yarn sheets S, instead of fabrics or multi-axial fabrics, achieves excellent smoothness. Composite material manufactured using the laminate has uniform physical properties such as strength.
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