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公开(公告)号：US11560646B2
公开(公告)日：2023-01-24
申请号：US16768370
申请日：2018-11-22
发明人： Shuhei Yoshida , Hidekazu Yoshikawa , Yosuke Nakamura , Hironori Kawamoto , Takaya Suzuki , Toru Kaneko
摘要： An object of the present invention is to provide a carbon fiber which exhibits excellent strength development rate when used in a composite material. The present invention that solves the problems is a carbon fiber which simultaneously satisfies the following formulae (1) and (2): Lc/d≤3 (1) TS×d×Lc>6.0×105 (2) wherein: Lc is an X-ray crystallite size (Å), d is a filament diameter (μm), and TS is a strand tensile strength (MPa).
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公开(公告)号：US11047073B2
公开(公告)日：2021-06-29
申请号：US16500273
申请日：2018-03-29
IPC分类号： D03D13/00 , B32B5/02 , B32B5/26 , B32B37/12 , D03D15/47 , B32B5/28 , B32B5/08 , B32B5/10 , B29C70/08 , B29C65/02 , B29C70/22
摘要： Method for producing a textile unidirectional fabric, wherein at least one planar layer of multi-filament reinforcement threads arranged parallel to each other are woven with each other over transverse threads, wherein transverse threads having core-sheath structure and titer of 10 to 40 tex are used as transverse threads, wherein transverse threads have a first component, which structures sheath, and second component, which structures core, wherein first component has lower melting temperature than second component, first component is meltable thermoplastic polymer material and, via first component of transverse threads, adjacently arranged multi-filament reinforcement threads are connected to each other by hot melting, wherein alleys are formed in unidirectional fabric by interweaving multi-filament reinforcement threads together with transverse threads, by means of which a permeability of 10 to 600 l/dm2/min can be established. Preferred embodiment relates to method for producing unidirectional fabric having fleece. Further, a fiber preform, produced from unidirectional fabric.
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