Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (01): 80-87.doi: 10.13475/j.fzxb.20180907508

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Alkali reduction and one-bath-one-step process for dyeing polyester knitted fabric

WANG Xiaoyan1, DU Jinmei1, PENG Lingqi1, JING Lili2, XU Changhai1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Penglai Jiaxin Dye Chemical Co., Ltd., Penglai, Shandong 265600, China
  • Received:2018-09-28 Revised:2019-10-21 Online:2020-01-15 Published:2020-01-14
  • Contact: XU Changhai E-mail:changhai_xu@jiangnan.edu.cn

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Abstract:

Polyester knitted fabrics are conventionally dyed with a process consisting alkali reduction, high temperature and high pressure exhaust dyeing, reduction cleaning, and washing. These steps are taking place individually, consuming more time and energy. To solve this problem in this research, polyester knitted fabrics were dyed with alkali-resistant disperse dyes under an alkali condition called one-bath-one-step exhaust dyeing and alkali reduction process. Influences of the dosage of sodium hydroxide, process temperature and duration on the properties of polyester fabrics using the one-bath-one-step process were investigated. An optimized process was obtained as follows: sodium hydroxide 10 g/L, temperature of 130 ℃ and duration of 50 min. It was found that compared with the ones obtained by conventional dyeing process, polyester fabrics treated with the one-bath-one-step process exhibited dyeing depth values 10% higher than the conventional dyeing process. This means that in order to achieve the same color, the use of one-bath-one-step process could save effectively the dosage of dyes. The dyed polyester fabrics treated with the one-bath-one-step process were stable in color and demonstrated excellent colorfastness.

Key words: polyester knitted fabric, alkali-resistance disperse dye, dyeing of polyester, alkali reduction, one-bath-one-step process, dyeing behavior

CLC Number: 

  • TS192.5

Fig.1

Conventional alkali reduction and washing process (a), dyeing process (b) and reduction cleaning and soap washing process (c) of polyester fabric"

Fig.2

One-bath-one-step dyeing and alkali reduction process (a) and soap washing process (b)"

Fig.3

Relationship between alkali concentration and K/S value of polyester fabric dyed with conventional and one-bath-one-step procesures. (a) Disperse Red HA-G;(b) Disperse Brown H-2R; (c) Disperse Blue HA-RL"

Tab.1

Reduction rate of polyester fabric dyed with one-bath-one-step and conventional procesures under different alkali concentrations"

NaOH质量
浓度/
(g·L-1)		 工艺 减量率/%
分散大红
HA-G		 分散黄棕
H-2R		 分散蓝
HA-RL
0.0 一浴一步法 0.00 0.00 0.00
常规工艺 0.00 0.00 0.00
2.5 一浴一步法 3.91 4.13 3.80
常规工艺 4.00 3.94 3.78
5.0 一浴一步法 8.10 8.56 8.93
常规工艺 7.90 8.00 8.50
7.5 一浴一步法 14.42 14.61 14.92
常规工艺 14.20 14.50 14.85
10.0 一浴一步法 20.36 20.10 20.23
常规工艺 20.18 20.20 20.00

Fig.4

Burst strength of polyester fabric dyed with one-bath-one-step procesure under different alkali concentrations"

Fig.5

Level-dyeing property of polyester fabric in different alkali concentrations"

Fig.6

Influence of dyeing temperature on K/S value of polyester fabrics"

Tab.2

Reduction rate of polyester fabric under different dying temperature"

温度/℃ 减量率/%
分散大红
HA-G		 分散黄棕
H-2R		 分散蓝
HA-RL
100 1.00 1.00 1.00
110 2.00 2.50 2.50
120 4.50 4.00 4.50
130 19.50 20.00 19.50

Fig.7

Influence of dyeing time on reduction rate (a) and K/S value (b) of polyester fabrics"

Tab.3

Properties of dyed polyester fabric"

染料 减量率/% K/S值 增深
率/%		 偏差Sλ
不加碱 烧碱10 g/L 不加碱 烧碱10 g/L 不加碱 烧碱10 g/L
分散大红HA-G 0.00 21.43 20.60 23.41 13.59 0.018 0.006
分散黄棕H-2R 0.00 20.96 12.08 13.43 11.15 0.015 0.009
分散蓝HA-RL 0.00 20.32 25.14 27.41 9.42 0.018 0.010
三原色的拼色 0.00 21.06 29.36 32.46 10.55 0.016 0.008

Tab.4

Laundering and crocking colorfastness of dyed polyester fabric级"

染料 耐水洗色牢度 耐摩擦色牢度
沾色 褪色 干摩擦 湿摩擦
毛 腈 涤 锦 棉 醋酯 沾色 褪色 沾色 褪色
分散大红HA-G 5 5 4~5 4 5 4~5 5 4~5 5 4~5 5
分散黄棕H-2R 5 5 5 4~5 5 4~5 5 5 5 4~5 5
分散蓝HA-RL 4~5 5 5 4 5 4~5 5 4~5 5 4~5 4~5
三原色的拼色 4~5 5 4~5 4 5 4~5 4~5 5 5 4~5 5

Tab.5

Colorfastness to perspiration of dyed polyester fabric级"

染料 耐酸汗渍色牢度 耐碱汗渍色牢度
沾色 褪色 沾色 褪色
毛 腈 涤 锦 棉 醋酯 毛 腈 涤 锦 棉 醋酯
分散大红HA-G 5 4~5 5 4~5 4~5 4~5 4~5 5 4~5 5 5 4~5 4~5 4~5
分散黄棕H-2R 5 5 5 4~5 5 4~5 5 5 5 5 4~5 5 4~5 5
分散蓝HA-RL 5 5 5 4~5 4~5 4~5 5 5 4~5 5 5 4~5 5 4~5
三原色的拼色 5 4~5 5 5 4~5 5 4~5 5 4~5 5 5 4~5 5 4~5

Tab.6

Water and saliva colorfastess of dyed polyester fabric级"

染料 耐水渍色牢度 耐唾液色牢度
沾色 褪色 沾色 褪色
毛 腈 涤 锦 棉 醋酯 毛 腈 涤 锦 棉 醋酯
分散大红HA-G 5 4~5 5 4~5 4~5 4~5 4~5 5 4~5 5 5 4~5 4~5 4~5
分散黄棕H-2R 5 4~5 5 4~5 4~5 5 5 5 4~5 5 5 4~5 5 4~5
分散蓝HA-RL 4~5 5 5 5 5 4~5 5 4~5 5 5 4~5 5 5 5
三原色的拼色 5 4~5 5 4~5 4~5 5 5 5 4~5 5 5 4~5 5 4~5
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