	US 12,134,842 B2
	Yarn for tire cord and tire cord
Ki Sub Lim, Seoul (KR); Il Chung, Seoul (KR); Sung Ho Park, Seoul (KR); Nermeen Nabih, Hannover (DE); Michael Schunack, Hannover (DE); and Thomas Kramer, Seoul (KR)
Assigned to KOLON INDUSTRIES, INC., Seoul (KR); and CONTINENTAL REIFEN DEUTSCHLAND GMBH, Hannover (DE)
Appl. No. 17/624,385
Filed by KOLON INDUSTRIES, INC., Seoul (KR); and CONTINENTAL REIFEN DEUTSCHLAND GMBH, Hannover (DE)
PCT Filed Jul. 3, 2020, PCT No. PCT/KR2020/008738 § 371(c)(1), (2) Date Jan. 3, 2022, PCT Pub. No. WO2021/006561, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 10-2019-0081578 (KR), filed on Jul. 5, 2019; and application No. 10-2020-0082062 (KR), filed on Jul. 3, 2020.
Prior Publication US 2022/0349094 A1, Nov. 3, 2022
Int. Cl. D02G 3/48 (2006.01); B60C 9/00 (2006.01); D01D 5/08 (2006.01); D01F 6/92 (2006.01); D01F 8/14 (2006.01)

CPC D02G 3/48 (2013.01) [B60C 9/00 (2013.01); D01D 5/08 (2013.01); D01F 6/92 (2013.01); D01F 8/14 (2013.01)]

14 Claims

1. Yarn for a tire cord comprising

polyethyleneterephthalate multifilament obtained by melting and spinning a resin composition comprising first polyethyleneterephthalate and second polyethyleneterephthalate having different intrinsic viscosities,

wherein the yarn has weight average molecular weight of 90,000 g/mol or more and polydispersity index of 1.9 to 2.3, and has tenacity of 8.0 gf/d or more,

wherein the resin composition comprises first polyethyleneterephthalate having intrinsic viscosity of 0.80 dl/g to 1.40 dl/g, and second polyethyleneterephthalate having intrinsic viscosity of 1.50 dl/g to 1.90 dl/g, and

wherein the resin composition comprises the second polyethyleneterephthalate in the content of 10 wt % to 40 wt %.