Delayed-cure durable press finishing technology for cotton fabrics

Patent metadata

Field	Value
Publication number	US-11718942-B2
Application number	US-202217897473-A
Country	US
Kind code	B2
Filing date	Aug 29, 2022
Priority date	Jun 28, 2021
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

The disclosure relates to the technical field of after-finishing of textile products, and in particular relates to a delayed-cure durable press finishing technology for cotton fabrics, including the following steps: singeing, desizing, liquid ammonia finishing, mercerizing, liquid ammonia finishing and post-cure finishing. The disclosure significantly improves the stability of a delayed-cure sensitized fabric during delayed-curing, relieves the problems caused by a slow reaction in the storage process of the delayed-cure sensitized fabric, and is favorable for improving the product quality.

First claim

What is claimed is:

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%.

2. The delayed-cure durable press finishing process of claim 1 , wherein the desizing step c) comprises:
immersing the fabric in an enzyme solution,
steaming the fabric,
washing the fabric in water, and then
drying the fabric;
wherein the steaming performed at 100° C. for 20 minutes; and
wherein the washing temperature is 90° C. to 100° C.

3. The delayed-cure durable press finishing process of claim 2 , wherein the enzyme solution comprises 3 g/L of a desizing enzyme, 4 g/L of a penetrant, and 2 g/L of a chelating agent.

Assignees

• Univ Jiangnan

Inventors

• Fu Jiajia
• Gao Weidong
• Liu Zhenyue
• Fan Xuerong
• Wang Lei
• Lu Yuzheng
• Meng Chaoran
• Li Rong

Classifications

• D06C27/00 Primary

  Compound processes or apparatus, for finishing or dressing textile fabrics, not otherwise provided for · CPC title

• D06C9/00

  Singeing (for making patterns or designs D06C23/02) · CPC title

• D06C2700/135

  Moistening of fabrics or yarns as a complementary treatment · CPC title

• D10B2201/02

  Cotton · CPC title

• D06M11/61 Primary

  Liquid ammonia · CPC title