Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (07): 115-122.doi: 10.13475/j.fzxb.20200907608

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Low-moisture content baking and steaming color fixation process for cotton fabrics padded with reactive dyes

CHEN Xiaowen1,2, WU Wei1,2, ZHONG Yi1,2,3, XU Hong1,2,3, MAO Zhiping1,2,3,4()   

  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. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
    4. Shanghai ANOKY Group Co., Ltd., Shanghai 201799, China
  • Received:2020-09-29 Revised:2021-01-14 Online:2021-07-15 Published:2021-07-22
  • Contact: MAO Zhiping E-mail:zhpmao@dhu.edu.cn

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Abstract:

To solve the problems of high energy consumption, hydrolysis of reactive dyes, high salinity and high discharge of wastewater in the conventional pad-dry-pad-steam process of cotton fabrics, a low-moisture content baking and steaming color fixation process for cotton fabrics was proposed using a sealed device. The changes of the fabric surface temperature in the sealing device were investigated,and the effects of moisture content on fabric heating and dyeing performance were discussed for theoretical analysis of low-moisture content baking and steaming color fixation for cotton fabrics. To determine the optimal technique, the effects of cotton fabrics baking and steaming temperature and time, and concentrations of substitute alkali and Na2SO4 were explored. Compared with the pad-dry-pad-steam process, the K/S value of the fabric dyed by low-moisture content baking and steaming color fixation process demonstrated an improvement. However, the rubbing fastness of cotton fabrics by the two processes was similar. Incorporating the sealing device in the pad-dye process offers a new method for improving reactive dye properties of cotton fabrics.

Key words: low-moisture content, baking and steaming color fixation, reactive dye, cotton fabric, substitute alkali, pad-dry-pad-steam

CLC Number: 

  • TS193.5

Fig.1

Schematic diagram of sealing device. (a) Exploded view; (b) Side view; (c) Top view"

Fig.2

Temperature change curve of cotton fabric in sealing device"

Fig.3

Temperature change curves of cotton fabric padded with different moisture content in sealing device. (a)Temperature of sealing device 100 ℃;(b) Temperature of sealing device 140 ℃;(c) Temperature of sealing device 170 ℃; (d) Local map within 60 s"

Fig.4

Effect of moisture content on K/S value of dyed fabric and dye fixation rate. (a)Dye concentration 5 g/L; (b) Dye concentration 10 g/L; (c) Dye concentration 30 g/L; (d) Dye concentration 60 g/L"

Fig.5

Effect of temperature on K/S value of dyed fabric and dye fixation rate "

Fig.6

Effect of time on K/S value of dyed fabric and dye fixation rate "

Fig.7

Effect of substituting alkali concentration on K/S value of dyed fabric and dye fixation rate "

Fig.8

Effect of Na2SO4 concentration on K/S value of dyed fabric and dye fixation rate "

Tab.1

K/S value of fabric dyed by different processes "

染料质量浓度/
(g·L-1) 		活性红243染色织物K/S值 活性红198染色织物K/S值 活性红278染色织物K/S值
焙蒸固色
(代用碱) 		焙蒸固色
(混合碱) 		轧烘轧蒸 焙蒸固色
(代用碱) 		焙蒸固色
(混合碱) 		轧烘轧蒸 焙蒸固色
(代用碱) 		焙蒸固色
(混合碱) 		轧烘轧蒸
5 5.82 6.01 3.32 9.44 4.91 2.82 8.75 8.36 6.01
10 9.88 8.68 6.65 14.06 8.75 6.53 13.80 13.06 10.77
20 11.95 11.85 11.49 18.02 15.06 11.98 17.32 16.39 14.59
30 14.43 13.89 12.95 20.38 18.19 14.49 19.81 18.82 16.98
40 15.65 15.27 14.01 21.59 20.41 16.59 20.54 20.07 18.17
50 16.95 16.08 15.94 21.86 21.76 18.03 21.67 20.93 19.31
60 17.90 17.70 16.16 22.19 21.96 18.82 22.21 21.24 20.24

Tab.2

Rubbing fastness of fabric dyed by different processes"

染色
工艺 		染料质量浓度/
(g·L-1) 		耐干摩擦色牢度/级 耐湿摩擦色牢度/级
红243 红198 红278 红243 红198 红278
焙蒸固色
(代用碱) 		10 4~5 5 5 4 4~5 4~5
30 4~5 5 4~5 3 4 4
50 4 4~5 3~4 3 3~4 3~4
焙蒸固色
(混合碱) 		10 5 5 5 4 4~5 4~5
30 5 5 4~5 4 4 3~4
50 5 5 3~4 3~4 3~4 3
轧烘轧蒸 10 5 5 4~5 4~5 4~5 4~5
30 5 5 4 4 4 3~4
50 4~5 5 4 3~4 3~4 3~4
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