Title:
METHOD FOR MANUFACTURING HIGH-STRENGTH SHEATH-CORE SYNTHETIC FIBER, AND HIGH-STRENGTH SHEATH-CORE SYNTHETIC FIBER MANUFACTURED THEREBY
Document Type and Number:
WIPO Patent Application WO/2024/053782
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a high-strength sheath-core synthetic fiber, and a high-strength sheath-core synthetic fiber manufactured thereby, and, to a method for manufacturing a sheath-core synthetic fiber, and a sheath-core synthetic fiber in which a sheath component is made of a resin that has, in comparison to a core component, lower extensional viscosity and thermal conductivity and a higher specific heat, the method comprising the steps of: forming a fiber by melt spinning a thermoplastic polymer of a sheath component and a core component through a spinneret including a sheath-core conjugated spinning nozzle; allowing molten fiber to pass, during the melt spinning, through a heating zone placed directly under the spinning nozzle, thereby heating same; cooling the heated fiber; and drawing the cooled fiber, wherein the sheath component uses the resin that has, in comparison to the core component, lower extensional viscosity and thermal conductivity and a higher specific heat. Provided is a high-strength microfiber satisfying a fine diameter and at least a specific ratio of strength to intrinsic viscosity.
Inventors:
HAHM WAN-GYU (KR)
BAE JONG-HYUK (KR)
OH HYUN-JU (KR)
JO KUK-HYUN (KR)
BAE JONG-HYUK (KR)
OH HYUN-JU (KR)
JO KUK-HYUN (KR)
Application Number:
PCT/KR2022/017735
Publication Date:
March 14, 2024
Filing Date:
November 11, 2022
Export Citation:
Assignee:
KOREA INST IND TECH (KR)
International Classes:
D01D5/34; D01D5/084; D01D5/088; D01D5/098; D01F8/06; D01F8/12; D01F8/14
Foreign References:
| KR20170105746A | 2017-09-20 | |||
| KR19980061106A | 1998-10-07 | |||
| KR20190022045A | 2019-03-06 |
Other References:
PARK, JONG-BUM ET AL.: "Fiber Structure Formation and Properties in High-Speed Melt Spinning of Sheath-Core Type PET Bicomponent Fibers (II)", PROCEEDINGS OF AUTUMN CONFERENCE OF THE KOREAN FIBER SOCIETY, KOREA, 1 January 1996 (1996-01-01), Korea, pages 209 - 211, XP009553639
AN HYUNG JOO, CHOI YOUNG CHAN, OH HYUN JU, NAM IN-WOO, KIM HO DONG, HAHM WAN-GYU: "Structure development in high-speed melt spinning of high-molecular weight poly(ethylene terephthalate)/polypropylene islands-in-the-sea bicomponent fibers", POLYMER, ELSEVIER, AMSTERDAM, NL, vol. 238, 1 January 2022 (2022-01-01), AMSTERDAM, NL, pages 124365, XP093146875, ISSN: 0032-3861, DOI: 10.1016/j.polymer.2021.124365
AN HYUNG JOO, CHOI YOUNG CHAN, OH HYUN JU, NAM IN-WOO, KIM HO DONG, HAHM WAN-GYU: "Structure development in high-speed melt spinning of high-molecular weight poly(ethylene terephthalate)/polypropylene islands-in-the-sea bicomponent fibers", POLYMER, ELSEVIER, AMSTERDAM, NL, vol. 238, 1 January 2022 (2022-01-01), AMSTERDAM, NL, pages 124365, XP093146875, ISSN: 0032-3861, DOI: 10.1016/j.polymer.2021.124365
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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