Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 91-96.doi: 10.13475/j.fzxb.20180603906

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

De-curling control of single-weft knitted fabric in open width pad-steam dyeing

MA Zhenping1,2, MAO Zhiping1,2,3, ZHONG Yi1,2,3, XU Hong1,2,3()   

  1. 1. Key Laboratory of Science & Technology of Eco-Textiles, Ministry of Education, Donghua University, Shanghai 201620, China
    2. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
    3. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
  • Received:2018-06-11 Revised:2019-01-10 Online:2019-05-15 Published:2019-05-21
  • Contact: XU Hong E-mail:hxu@dhu.edu.cn

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Abstract:

The edges of single-weft knitted fabric was treated with paste to prevent the edges from curling during the open width pad-steam dyeing process. The sizing agents and their coating applied ways were optimized by comparing the curling rates and washing durability during open-width wet processing. As a result, the polyacrylate-polyurethane was used as a sizing agent. The suitable processes for medium weight and thick knitted fabric are as follows: the serrated coating is applied along the grain direction on the reverse side of fabrics, and the thickness of the coating reaches 0.2 mm. The width of the coating is no less than 2 cm. The results show that the method can effectively control the curling of the knitted fabric in the open width pad-steam dyeing process and has no effect on the dyeing performance.

Key words: open width dyeing, single-weft knitted fabric, polyacrylate-polyurethane, curling, washing durability

CLC Number: 

  • TS181.8

Tab.1

Different anti-curling coating states under different dyeing conditions"

硬挺剂种类 卷边率C/%
浆边烘干 浸轧染液 汽蒸 皂煮 烘干
聚氨酯 0 9.05 0 16.03 12.06
F-404 0 2.03 0 11.44 15.88
EcofunYTJ 0 4.27 0 11.22 10.24
丙烯酸酯-聚氨酯 0 0.00 0 5.73 0.00

Tab.2

Washability of different fabrics after finishing"

硬挺剂种类 整理后质量/g 水洗后质量/g 质量损失率/%
聚氨酯 1.46 1.37 6.2
F-404 1.41 1.35 4.3
EcofunYTJ 1.46 1.41 3.4
丙烯酸酯-聚氨酯 1.46 1.46 0.0

Fig.1

Coating adhesive applied shapes. (a) Fully coated;(b) Strip-like; (c) Non-continuous serrated;(d) Continuous serrated"

Fig.2

Tensile curves for different coating shapes"

Fig.3

Knitted fabric structure and coating position"

Tab.3

Influence of coating position & thickness on anti-curling effect"

浆膜厚度/mm 卷边率C/%
正面 反面
0.20 8.16 0.00
0.25 7.81 0.00
0.30 3.89 0.00
0.40 9.68 0.00
0.50 11.34 0.92

Tab.4

Influence of edge width on anti-curling effect"

浆边宽
度/cm		 卷边率C/%
烘干后 前处理后 浸轧染液 汽蒸 皂煮后
1.0 1.89 16.66 — — —
1.5 0.00 0.87 0 0 0
2.0 0.00 0.00 0 0 0

Fig.4

Influence of continuous serrated coating on dyeing effect at different dye concentrations"

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