公开(公告)号：US20210002791A1

公开(公告)日：2021-01-07

申请号：US17023532

申请日：2020-09-17

Applicant: KURARAY CO., LTD.

Inventor： Takeshi TSUDAKA ,  Shohei TSUNOFURI ,  Yosuke WASHITAKE

IPC: D01F6/60 ,  C08G69/26 ,  D01D5/08

Abstract: Provided is a semi-aromatic polyamide fiber having excellent spinning stability, heat resistance and chemical resistance. The semi-aromatic polyamide fiber includes a semi-aromatic polyamide resin having a melting point of 290° C. or higher and a plasticizer having a 5% thermal weight reduction temperature of 320° C. or higher, the resin having as a dicarboxylic acid component an aromatic dicarboxylic acid unit and as a diamine component 1,9-nonanediamine unit and 2-methyl-1,8-octanediamine unit in a molar ratio (the former:the latter) of 70:30 to 99:1.

公开(公告)号：US20220363810A1

公开(公告)日：2022-11-17

申请号：US17870982

申请日：2022-07-22

Applicant: KURARAY CO., LTD.

Inventor： Yuki INOUE ,  Takeshi TSUDAKA ,  Ryokei ENDO

IPC: C08G59/24 ,  D01F6/66 ,  D01D5/08 ,  C08K7/02

Abstract: Provided is an amorphous epoxy fiber excellent in dimensional stability, a fiber structure comprising at least in part amorphous epoxy fibers, and a molded body formed by melting said fibers. The amorphous epoxy fiber has a birefringence value of 0.005 or lower. For example, the amorphous epoxy fiber may include an amorphous epoxy resin represented by the following general formula: in which, X is a residue of a bivalent phenol and n is 20 or greater (preferably 20 to 300, more preferably 40 to 280, still more preferably 50 to 250). The amorphous epoxy fiber may have an average fiber diameter of single fibers of 40 μm or smaller.

公开(公告)号：US20210382228A1

公开(公告)日：2021-12-09

申请号：US17286554

申请日：2019-10-23

Applicant: KURARAY CO., LTD.

Inventor： Takeshi TSUDAKA ,  Yosuke WASHITAKE ,  Ryokei ENDO ,  Shunsuke SUIKO

IPC: G02B6/02 ,  F21V8/00 ,  G02B1/04

Abstract: A light-emitting fiber includes a core and a cladding and is configured to emit light through a side surface of the fiber. A resin used for the core is at least one selected from the group consisting of polymethyl methacrylate, polymethyl methacrylate copolymers, polystyrene, polycarbonates, polyorganosiloxanes, and norbornene, and a resin used for the cladding is fluorine resin. The light-emitting fiber has a fiber diameter of 95 μm or less.