Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 64-68.doi: 10.13475/j.fzxb.20181102906

• Textile Engineering • Previous Articles     Next Articles

Shape analysis of biaxial stretching coil of weft plain knitted cotton fabric

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:2018-11-12 Revised:2019-05-10 Online:2019-11-15 Published:2019-11-26
  • Contact: FU Shaohai E-mail:shaohaifu@hotmail.com

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Abstract:

In view of the problem that the coil is deformed easily in the process of smooth mercerization, the weft plain knitted cotton fabric before mercerizing was stretched bilaterally, the shape changes of coils under different tensile conditions were studied. The fabric was divided into different units by a grid method, and the change rule of the displacement vector, coil spacing, coil height, shape coefficient and shear angle of different elements under biaxial stretching were studied. The results show that the less deformed region of fabric is elliptical, and with the tensile tension increases, ellipse area reduces, and the coil spacing and the coil height obey the trend of the parabola; the coil shape coefficient has a periodic gradient distribution, the maximum shear angle of the fabric decreases, and all the shear angles decrease slowly.

Key words: weft plain knitted cotton fabric, grid method, biaxial stretching, coil shape, structural parameter

CLC Number: 

  • TS181

Fig.1

Experimental mercerizing device"

Fig.2

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

Fig.3

Nodal vector field (a) and displacement field (b) of fabric at different tension conditions"

Fig.4

Coil spacing and height in horizontal and vertical direction of unit on center line. (a) Horizontal coil spaing; (b) Horizontal coil height; (c) Vertical coil spacing; (d) Vertical coil height"

Tab.1

Fitting equation of coil spacing and coil height"

织物单元 扩幅/% 方程 R2
横向圈距 5 Y=7.352 32-0.048 09X+0.002 29X2 0.992 84
10 Y=7.610 91-0.068 16X+0.003 25X2 0.959 65
15 Y=8.020 49-0.083 59X+0.003 98X2 0.988 68
横向圈高 5 Y=7.250 81-0.011 67X+0.000 555 9X2 0.980 95
10 Y=7.416 49-0.018 13X+0.000 863 5X2 0.990 77
15 Y=7.967 09-0.019 11X+0.000 910 2X2 0.950 47
纵向圈距 5 Y=7.164 67-0.014 09X+0.000 670 9X2 0.983 38
10 Y=7.411 58-0.027 7X+0.001 32X2 0.991 03
15 Y=7.721 89-0.022 61X+0.001 08X2 0.987 34
纵向圈高 5 Y=7.380 11-0.037 39X+0.001 78X2 0.992 84
10 Y=7.609 68-0.056 91X+0.002 71X2 0.959 65
15 Y=8.082 25-0.039 07X+0.001 86X2 0.988 68

Fig.5

Shape coefficient of each unit on center line in horizontal (a) and vertical (b) direction"

Fig.6

Shape coefficient of all units in fabric with different tension conditions"

Fig.7

Shear angle of all units in fabric with different tension conditions"

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