Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (03): 9-13.doi: 10.13475/j.fzxb.20201005605

• Invited Column:Full-process Open Width Printing and Dyeing Technology for Knitted Fabric • Previous Articles     Next Articles

Effect of open width pretreatment on dyeing property of cotton knitted fabrics

ZHANG Tengjialu1,2, WU Wei1,2, ZHONG Yi1,2, MAO Zhiping1,2,3, XU Hong1,2()   

  1. 1. Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China
    2. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
    3. National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Tai'an, Shandong 271000, China
  • Received:2020-10-26 Revised:2020-12-23 Online:2021-03-15 Published:2021-03-17
  • Contact: XU Hong E-mail:hxu@dhu.edu.cn

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Abstract:

The open width continuous pretreatment of knitted fabric has the advantages of high efficiency, water saving and low cost. However, there is a problem of low apparent color yield in subsequent dyeing of semi-finished products after the treatment. In order to solve this problem, cotton knitted fabric properties and fiber structure after the open width pretreatment were measured and analyzed. The results show that compared with the traditional impregnation pretreatment, the cotton knitted fabric after open width pretreatment has higher strength, similar whiteness and capillary effect, lower fixation rate and K/S value after pad dyeing, the supramolecular structure of the cotton fiber is quite different from that of the traditional impregnation pretreatment. Compared with the impregnation process, the crystallinity of the fiber after open width pretreatment is higher, the pore size distribution is narrower, and the total pore volume and pore surface area is smaller. By adding semi-mercerizing treatment, the open width pretreatment process is improved.

Key words: cotton knitted fabric, open-width pretreatment, dyeing property, pore structure, color strength, semi-mercerizing treatment

CLC Number: 

  • TS192.5

Tab.1

Comparison of treatment effects of different bleaching and scouring processes"

前处理工艺 质量损失率/% 顶破强力/N CIE白度/% 毛效(纵向)/cm H2O2残留量/(mg·g-1) 结晶度/%
未处理 — 380.38 — — — —
浸渍 4.8 364.90 70.04 11.2 0.105 62.7
平幅 3.5 366.75 70.12 10.7 0.104 67.9

Tab.2

Comparison of dyeing properties of cotton knitted fabrics with different bleaching and scouring processes"

前处理
工艺		 固色率/% K/S值 耐摩擦色牢度/级 耐皂洗色牢度/级
干摩 湿摩 棉沾 毛沾
浸渍 82.26 11.89 5 4~5 4~5 4~5
平幅 73.17 10.72 5 4~5 4~5 4~5

Fig.1

Melting curves of water in cotton fiber with different pretreatment processes (a) and pore diameter distribution diagram inside fiber (b)"

Tab.3

Pore properties of cotton fibers with different pretreatment processes"

前处理工艺 平均孔半径/nm 孔道总容积/
(cm3·g-1)		 孔内表面积/
(m2·g-1)
浸渍 70.36 0.39 10.97
平幅 77.23 0.22 5.77

Fig.2

Effect of NaOH concentration on crystallinity (a) and open width pad dyeing effect (b) of cotton fiber"

Fig.3

Pore diameter distribution diagram inside cotton fiber with different pretreatment processes"

Tab.4

Influence of weak mercerization process on properties of cotton fabric"

白度/% 毛效/cm 强力/N 孔道总容积/
(cm3·g-1)		 孔内表面
积/(m2·g-1)		 结晶度/% 平幅轧染
固色率/% K/S值
70.46 10.7 390.30 0.67 19.35 58.0 87.31 13.02
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