Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (05): 51-58.doi: 10.13475/j.fzxb.20200407108

• Textile Engineering • Previous Articles     Next Articles

Comparative study on testing methods for unidirectional water transport in fabrics

JIANG Yanting1, YAN Qingshuai1, XIN Binjie1(), GAO Cong1, SHI Meiwu2   

  1. 1. School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
    2. Institute of Quartermaster Engineering & Technology, Institute of System Engineering, Academy of Military Sciences, Beijing 100010, China
  • Received:2020-04-28 Revised:2021-02-18 Online:2021-05-15 Published:2021-05-20
  • Contact: XIN Binjie E-mail:xinbj@sues.edu.cn

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Abstract:

The unidirectional water transport performance of textiles is a key index that affects the comfort of textiles or sports textiles used for the summer season. On the basis of analyzing the state of water diffusion measured by moisture management tester (MMT) needle array sensor, four types of fabrics are selected for actual measurement. It is reflected that the MMT method is prone to large test errors for fabrics with dot-array water repellent application for unidirectional water transport function and for unidirectional water transport fabrics with embedded conductive fibers. A new method was proposed to collect dynamically the water transfer image of the front and back sides of textiles, which offers more complete water infiltration information. The unidirectional water transfer performance of textiles in one direction were evaluated easily to obtain more accurate results. The new image method for dynamical collection of water transmission images of the front and back of textiles demonstrates a good application prospect.

Key words: textiles, moisture absorption and quick drying, unidirectional water transport, image processing, dynamic water transfer, thermal and wet comfort

CLC Number: 

  • TS107.1

Fig.1

Testing principle of moisture management tester"

Tab.1

MMT test results of 4 different fabrics"

样品
编号		 浸湿时间 吸水速率 最大浸湿半径 液态水扩散速度 单向传递指数
平均
值/s		 标准
偏差/s		 CV
值/%		 平均值/
(%·s-1)		 标准偏差/
(%·s-1)		 CV
值/%		 平均
值/mm		 标准偏
差/mm		 CV
值/%		 平均值/
(mm·s-1)		 标准偏差/
(mm·s-1)		 CV
值/%		 平均值 标准
偏差		 CV
值/%
1 上 1.13 0.47 42 46.83 8.62 18 28.33 2.89 10 7.48 2.21 30 58.47 58.64 100
下 0.66 0.35 53 60.68 6.28 10 28.33 2.89 10 10.87 4.52 42
2 上 0.32 0.00 0 36.71 2.44 7 30.00 0.00 0 17.66 0.42 2 534.59 20.27 4
下 0.32 0.00 0 71.56 6.89 10 30.00 0.00 0 21.00 3.45 16
3 上 1.13 0.05 4 42.81 3.09 7 30.00 0.00 0 7.95 0.39 5 288.45 93.02 32
下 0.32 0.00 0 65.91 3.12 5 30.00 0.00 0 17.17 0.29 2
4 上 1.13 0.20 17 38.21 4.30 11 30.00 0.00 0 8.61 1.07 12 174.90 11.37 7
下 0.32 0.00 0 54.13 10.18 19 30.00 0.00 0 19.79 4.49 23

Fig.2

Image acquisition system"

Fig.3

Raw wetting image sequence of sample 4. (a)Hydrophilic surface; (b)Hydrophobic surface"

Fig.4

Algorithm structure diagram of liquid water transfer image analysis"

Fig.5

Comparison of fabric hydrophilic surface wetting. (a)Before wetting; (b)After wetting"

Fig.6

Preprocessing diagram of images. (a) Adjust gray scale range; (b) Bilateral filtering; (c) Binarization; (d) Open operation; (e) Closed operation; (f)Remove noise"

Fig.7

Preprocessing image sequence. (a)Hydrophilic surface; (b)Hydrophobic surface"

Fig.8

Pixel and image sequence relationship curve"

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