公开(公告)号：US20210238768A1

公开(公告)日：2021-08-05

申请号：US16098442

申请日：2017-04-24

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Wan Gyu HAHM ,  In Woo NAM ,  Seung Jin LEE ,  Ki Sub LIM

IPC: D01D4/02 ,  D01D5/084 ,  D01D10/02

Abstract: The present invention relates to a spinning nozzle apparatus for manufacturing a high-strength fiber.
The spinning nozzle apparatus for manufacturing a high-strength fiber according to the present invention is designed to optimize a heating method for the spinning region of a spinning nozzle in the melt spinning process. The heat transfer method is optimized by disposing the spinning nozzle holes of spinning nozzle commercially available on the outside of, directly under the pack body and heating the spinning nozzle holes with a heating body. In addition, an instantaneous heat treatment at high temperature is adopted to control the molecular entanglement structure in the melted polymer, which enhances the drawability of the thermoplastic resin and hence improves the mechanical properties such as strength and elongation.

公开(公告)号：US20180051392A1

公开(公告)日：2018-02-22

申请号：US15556859

申请日：2016-03-09

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Wan Gyu HAHM ,  In Woo NAM ,  Seung Jin LEE ,  Do Kun KIM ,  Ki Sub LIM ,  Joo Hyung LEE ,  Gyu Dong LEE ,  Yeong Og CHOI ,  Byeong Jin YEANG

IPC: D01D5/084 ,  D01D5/088 ,  D01D5/098 ,  D01D5/30 ,  D01D5/32 ,  D01F6/62 ,  D01F8/14 ,  D01F6/60 ,  D01F8/12 ,  D01F6/06 ,  D01F8/06

Abstract: Provided is a method of manufacturing high strength synthetic fibers, and high strength synthetic fibers manufactured using the same. More particularly, the method involves a localized heating process by raising the temperature of a molten spinning fiber to a temperature higher than that of a pack body during a short period of time with no degradation through a heating zone located in the immediate vicinity of capillary in the spinning nozzle, so as to effectively control the molecular entanglement structure in the molten polymer without reducing the molecular weight and thus to enhance the drawability of the as-spun fibers, thereby improving the mechanical properties of the as-spun fibers, such as strength, elongation, etc., using the existing processes of melt spinning and drawing and thus enabling a mass production of a high-performance fiber at low cost.