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%.
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