EP 3686326 A4 20211006 - HIGH-STRENGTH POLYETHYLENE TEREPHTHALATE YARN AND METHOD FOR PRODUCING THE SAME
Title (en)
HIGH-STRENGTH POLYETHYLENE TEREPHTHALATE YARN AND METHOD FOR PRODUCING THE SAME
Title (de)
HOCHFESTES POLYETHYLENTEREPHTHALATGARN UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
FIBRE DE POLYÉTHYLÈNE TÉRÉPHTALATE À RÉSISTANCE ÉLEVÉE ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20170122246 A 20170922
- KR 2018010211 W 20180903
Abstract (en)
[origin: EP3686326A1] Disclosed are a PET fiber having an intrinsic viscosity of 1.1 dl/g or higher and a tensile strength of 10 g/d or higher, and a manufacturing method therefor. A manufacturing method according to the present invention includes the steps of: melting a polyethylene terephthalate chip having an intrinsic viscosity of 1.4 to 1.7 dl/g to prepare a spinning melt; discharging the spinning melt through a nozzle of a spinning pack; heating the spinning melt just before being discharged from the nozzle by means of a heat source of 300 to 500 °C located immediately below the nozzle; converging a plurality of filaments formed by the discharging to form a multifilament; and drawing the multifilament, wherein a temperature of the spinning pack is maintained at 280 to 305 °C.
IPC 8 full level
D01F 6/62 (2006.01); D01D 5/084 (2006.01); D01D 5/098 (2006.01); D06M 15/00 (2006.01)
CPC (source: EP KR US)
D01D 5/084 (2013.01 - EP KR US); D01D 5/098 (2013.01 - EP KR US); D01F 6/62 (2013.01 - EP KR US); D10B 2401/063 (2013.01 - KR)
Citation (search report)
- [XYI] EP 1845177 A2 20071017 - HYOSUNG CORP [KR]
- [X] KR 101575837 B1 20151222
- [Y] KR 20170090636 A 20170808 - KOLON INC [KR]
- See references of WO 2019059560A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3686326 A1 20200729; EP 3686326 A4 20211006; CN 111148866 A 20200512; JP 2020531710 A 20201105; JP 2021120501 A 20210819; KR 20190034083 A 20190401; US 2020216980 A1 20200709; WO 2019059560 A1 20190328
DOCDB simple family (application)
EP 18858587 A 20180903; CN 201880061237 A 20180903; JP 2020531410 A 20180903; JP 2021086074 A 20210521; KR 2018010211 W 20180903; KR 20180104442 A 20180903; US 201816640771 A 20180903