US 12,325,939 B2
Spunbonded nonwoven fabric and tile carpet using the same
Woo-seok Choi, Seoul (KR); Min-ho Lee, Seoul (KR); Hee-jung Cho, Seoul (KR); Young-shin Park, Seoul (KR); and Jung-soon Jang, Seoul (KR)
Assigned to KOLON INDUSTRIES, INC., Seoul (KR)
Appl. No. 17/905,937
Filed by KOLON INDUSTRIES, INC., Seoul (KR)
PCT Filed Feb. 19, 2021, PCT No. PCT/KR2021/002131
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/201430, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 10-2020-0039114 (KR), filed on Mar. 31, 2020; and application No. 10-2021-0022107 (KR), filed on Feb. 18, 2021.
Prior Publication US 2023/0139097 A1, May 4, 2023
Int. Cl. D04H 3/16 (2006.01); D04H 3/011 (2012.01)
CPC D04H 3/16 (2013.01) [D04H 3/011 (2013.01); D10B 2401/063 (2013.01); D10B 2503/041 (2013.01); Y10T 442/681 (2015.04); Y10T 442/697 (2015.04)] 8 Claims
OG exemplary drawing
 
1. A spunbonded nonwoven fabric having a fiber web and heat-bonded form using filament yarns of a first filament composed of a recycled polyester having a melting point of 255° C. or more, and a second filament prepared from a copolyester having a melting point that is lower by 30° C. or more than that of the first filament,
wherein the recycled polyester contains a recycled material of a waste polyester polymer obtained by using a monomer composition in which a ratio of diethylene glycol to ethylene glycol is 1.30 or less, and has an intrinsic viscosity (IV) of 0.60 to 0.80 dl/g, and a crystallization temperature of 175° C. or more and lower than 185° C.