US 11,718,942 B2
Delayed-cure durable press finishing technology for cotton fabrics
Jiajia Fu, Wuxi (CN); Weidong Gao, Wuxi (CN); Zhenyue Liu, Wuxi (CN); Xuerong Fan, Wuxi (CN); Lei Wang, Wuxi (CN); Yuzheng Lu, Wuxi (CN); Chaoran Meng, Wuxi (CN); and Rong Li, Wuxi (CN)
Assigned to JIANGNAN UNIVERSITY, Wuxi (CN)
Filed by Jiangnan University, Wuxi (CN)
Filed on Aug. 29, 2022, as Appl. No. 17/897,473.
Application 17/897,473 is a continuation of application No. PCT/CN2022/097087, filed on Jun. 6, 2022.
Claims priority of application No. 202110720726.2 (CN), filed on Jun. 28, 2021.
Prior Publication US 2023/0002948 A1, Jan. 5, 2023
Int. Cl. D06C 27/00 (2006.01); D06C 9/00 (2006.01)
CPC D06C 27/00 (2013.01) [D06C 9/00 (2013.01); D06C 2700/135 (2013.01); D10B 2201/02 (2013.01)] 3 Claims
 
1. A delayed-cure durable press finishing process for cotton fabrics, which comprises the following steps performed sequentially:
a) providing a fabric, wherein the fabric is comprised of cotton,
b) singeing the fabric,
c) desizing the fabric,
d) conducting a first liquid ammonia finishing at a feed rate of 50 to 60 meters of fabric per minute, at 80° C., and at a pH of 6, which comprises: i) curing the fabric, ii) cooling the fabric, iii) performing a liquid ammonia treatment, iv) steaming the fabric at 90° C. to 100° C., v) washing the fabric in water with applied tension at 90° C. to 100° C., and vi) drying the fabric,
e) mercerizing the fabric at a feed rate of 60 to 70 meters of the fabric per minute, which comprises: immersing the fabric in an alkaline solution for 4 to 6 minutes, then washing the fabric at 90° C. to 100° C. at a pH of 4.5 to 5.0, and then adjusting the pH to neutral,
f) conducting a second liquid ammonia finishing at a feed rate of 50 to 60 meters of fabric per minute, at 80° C., and at a pH of 6, which comprises: i) curing the fabric, ii) cooling the fabric, iii) performing a liquid ammonia treatment, iv) steaming the fabric at 90° C. to 100° C., v) washing the fabric in water with applied tension at 90° C. to 100° C., and vi) drying the fabric, and
g) post-cure finishing the fabric, which comprises: padding the fabric in a double-dip-double-nip method at a fabric pick up rate of 70% to 90%, and curing the fabric at 80° C. to 85° C. for 2 to 3 minutes to obtain a delayed-cure sensitized fabric having a moisture regain at doffing of 7% to 9%.