US 11,807,959 B2
Polyamide-610 multifilament
Yoshihiro Kurouzu, Osaka (JP); Ikuo Matsutori, Okazaki (JP); and Takashi Uruma, Okazaki (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 16/975,420
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Feb. 22, 2019, PCT No. PCT/JP2019/006913
§ 371(c)(1), (2) Date Aug. 25, 2020,
PCT Pub. No. WO2019/163971, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-031834 (JP), filed on Feb. 26, 2018.
Prior Publication US 2021/0002790 A1, Jan. 7, 2021
Int. Cl. D01F 6/60 (2006.01)
CPC D01F 6/60 (2013.01) 17 Claims
OG exemplary drawing
 
1. A polyamide 610 multifilament having a sulfuric acid relative viscosity of 3.3 to 3.7, a strength of 7.3 cN/dtex to 9.2 cN/dtex and an elongation of 20% to 30%,
wherein the polyamide 610 multifilament is produced from a chip of polyamide 610 at a take-up speed of 350 to 1100 m/min and a draw ratio of 3 to 6, wherein the chip has a sulfuric acid relative viscosity of 3.6 to 4.0 and a moisture content of 0.05% to 0.13%.