Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (04): 98-105.doi: 10.13475/j.fzxb.20181106008

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Relationship between open-width mercerization condition and loop structure of weft plain-knitted cotton fabrics

WEI Tengxiang1,2, LI Min1,2, PENG Hongyun1,2, FU Shaohai1,2()   

  1. 1. Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Wuxi, Jiangsu 214122, China
    2. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-11-21 Revised:2020-01-15 Online:2020-04-15 Published:2020-04-27
  • Contact: FU Shaohai E-mail:shaohaifu@hotmail.com

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Abstract:

The change of loop structure of mercerized weft plain-knitted cotton fabric was studied to solve the problem that the loop is easily deformed in the process of open-width mercerization. In this research, the fabric was cut into different fabric pieces using the grid method, and the displacement vector, loop spacing and height, shape coefficient and shear angle of different units under biaxial stretching were investigated under biaxial tensile loading. The results show that tension and NaOH concentration of mercerizing have significant effects on the shape change of the loops, while temperature and time of mercerizing have less effect on the loop shape. For the mercerized fabric, a uniform elliptical region appeared with the displacement ratio less than 50%. Moreover, the loop spacing and height obey parabola model with the fitting degree higher than 0.94. The loop shape coefficient presents periodic gradient distribution. The shear angle exhibites an obvious response to the optimal mercerizing condition, which is obtained to be 5% tension extension, 200 g/L NaOH at 50 ℃ for 120 s.

Key words: weft plain-knitted cotton fabric, grid method, open-width mercerizing, biaxial stretching, loop shape, fabric vector field

CLC Number: 

  • TS181

Fig.1

Experimental mercerizing device"

Fig.2

Diagram of coil shear angle. (a) Before stretch; (b) After stretch"

Fig.3

Vector field of fabric at different tensile extensions"

Fig.4

Centralized coil spacing and height of fabric at different tensile extensions"

Fig.5

Shape coefficient of fabric at different tensile extensions"

Fig.6

Shear angles of fabric at different tensile extensions"

Fig.7

Vector field of fabric at different NaOH mass concentrations"

Fig.8

Coil spacing and height of fabric at different NaOH mass concentrations"

Fig.9

Shape coefficient of fabric at different NaOH mass concentrations"

Fig.10

Shear angles of fabric at different NaOH mass concentrations"

Fig.11

Vector field of fabric at different mercerization temperatures"

Fig.12

Coil spacing and height of fabric at different mercerization temperatures"

Fig.13

Shape coefficient of fabric at different mercerization temperatures"

Fig.14

Shear angles of fabric at different mercerization temperatures"

Fig.15

Vector field of fabric at different mercerization time"

Fig.16

Coil spacing and height of fabric at different mercerization time"

Fig.17

Shape coefficient of fabric at different merceization time"

Fig.18

Shear angles of fabric at different mercerization time"

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[1] WEI Tengxiang, LI Min, PENG Hongyun, FU Shaohai. Shape analysis of biaxial stretching coil of weft plain knitted cotton fabric [J]. Journal of Textile Research, 2019, 40(11): 64-68.
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