	US 12,466,933 B2
	Method for processing waste fabric containing polyester and cotton fibers
Te-Chao Liao, Taipei (TW); Jung-Jen Chuang, Taipei (TW); Chung-Chi Su, Taipei (TW); and Zhang-Jian Huang, Taipei (TW)
Assigned to NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed by NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed on Jul. 26, 2022, as Appl. No. 17/874,263.
Claims priority of application No. 110139423 (TW), filed on Oct. 25, 2021.
Prior Publication US 2023/0126608 A1, Apr. 27, 2023
Int. Cl. C08J 11/08 (2006.01); C08J 11/26 (2006.01); D01G 11/00 (2006.01)

CPC C08J 11/26 (2013.01) [D01G 11/00 (2013.01); C08J 2367/00 (2013.01); D10B 2201/02 (2013.01); D10B 2331/04 (2013.01)]

10 Claims

1. A method for processing a waste fabric containing polyester and cotton fibers, comprising:

providing a plurality of fabric scraps each containing polyester fibers and cotton fibers;

having an acid catalyst aqueous solution repeatedly contact and react with the fabric scraps at 130° C. to 160° C. in a circulation and backflow manner, so as to separate the cotton fibers from each of the fabric scraps,

wherein a contact frequency of the acid catalyst aqueous solution with the fabric scraps is 3 to 4 times per minute, and a solid to liquid ratio of the fabric scraps to the acid catalyst aqueous solution is 1:5-25; and

recycling the reacted acid catalyst aqueous solution and fabric scraps.