Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (09): 167-174.doi: 10.13475/j.fzxb.20210802708

• Apparel Engineering • Previous Articles     Next Articles

Effect of clothing deformation on thermal insulation capacity of down jackets

WU Daiwei1, HUANG Jiacheng1, WANG Yunyi1,2()   

  1. 1. College of Fashion and Design, Donghua University, Shanghai 200051, China
    2. Key Laboratory of Clothing Design and Technology, Ministry of Education, Donghua University, Shanghai 200051, China
  • Received:2021-08-03 Revised:2022-06-04 Online:2022-09-15 Published:2022-09-26
  • Contact: WANG Yunyi E-mail:wangyunyi@dhu.edu.cn

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Abstract:

To explore the influence of clothing deformation on the thermal insulation capacity of down jackets, a belt tightening method was used to deform the clothing with deformation levels. Four levels of down fill weight, 110, 135, 150, 180 g/m2, representing light, ordinary, midweight, and weight protective down jackets, were adopted to make sample down jackets. The thermal resistance of these samples, as well as the local volume which consists of the sample and the air layer under it under different deformation levels were obtained by thermal manikin test, respectively. The influence of clothing deformation on the total and local thermal resistance of down jackets was then investigated and analyzed. The results show that the deformation of down jackets will change the state of air flow inside the down jackets, having influence on the thermal insulation capacity of down jackets depending on different down fill weight. There exists a degree of deformation that leads to the optimal thermal insulation capacity of the down jackets. Local thermal insulation value of clothing and the range and regularity of its variation affected by deformation are associated with the concave and convex body surface, and with the clothing openings.

Key words: clothing deformation, down jacket, down fill weight, thermal insulation capacity, heat transfer

CLC Number: 

  • TS941.77

Tab.1

Specifications of down jacket samplecm"

衣长 袖长 肩宽 领围 胸围 腰围 下摆 袖窿长 袖口
70 63 55.5 60.5 123 118 116 56.5 20

Fig.1

Belt tightening method to simulate down jacket deformation under pressure"

Tab.2

Design of deformation level"

部位 不同形变水平系带收紧量/cm
0 a/3 2a/3 a
A 0 2.5 5 7.5
B 0 7.0 14 21.0
C 0 8.0 16 24.0
D 0 9.0 18 27.0

Fig.2

Down jacket sample and scanning mark point"

Tab.3

Total thermal resistance of down jacket system under different deformation levels"

充绒量/
(g·m-2)		 总热阻(R)/clo
无形变 低形变 中形变 高形变
110 1.556 1.583 1.578 1.542
135 1.650 1.653 1.624 1.610
150 1.634 1.634 1.615 1.565
180 1.601 1.636 1.603 1.591

Tab.4

Change rate of total thermal resistance of down jacket system when deformation state changes"

充绒量/
(g·m-2)		 无形变-
低形变/%		 低形变-
中形变/%		 中形变-
高形变/%
110 1.74 -0.32 -2.28
135 0.18 -1.75 -0.86
150 0.00 -1.16 -3.10
180 2.19 -2.02 -0.75

Fig.3

Eight zones and belt positions of thermal manikin"

Tab.5

Local thermal resistance of down jacket system with fill weight of 110 g/m2 under different deformation levels"

形变水平 不同部位热阻/clo
UC UB LC LB WA WB RA RB
无形变 2.825 3.351 5.235 5.524 5.559 3.493 3.063 3.583
低形变 2.755 3.523 5.707 5.664 5.031 3.707 3.093 3.751
中形变 2.715 3.177 4.875 5.476 5.235 3.511 3.450 4.053
高形变 2.580 3.289 4.233 5.415 4.270 2.880 3.103 3.514

Tab.6

Local thermal resistance of down jacket system with fill weight of 135 g/m2 under different deformation levels"

形变水平 不同部位热阻/clo
UC UB LC LB WA WB RA RB
无形变 3.211 3.535 6.575 6.226 5.233 4.001 3.303 5.028
低形变 3.028 3.552 5.873 6.275 5.711 3.794 3.630 4.882
中形变 2.715 3.177 4.875 5.476 5.235 3.511 3.450 4.053
高形变 3.053 3.536 5.086 5.570 4.988 3.182 3.725 4.192

Tab.7

Local thermal resistance of down jacket system with fill weight of 150 g/m2 under different deformation levels"

形变水平 不同部位热阻/clo
UC UB LC LB WA WB RA RB
无形变 3.171 3.858 6.710 6.240 5.514 4.199 3.300 4.726
低形变 3.417 4.136 6.300 5.947 5.683 4.055 3.490 5.171
中形变 3.083 3.623 5.602 6.222 5.318 3.643 3.387 4.114
高形变 3.091 3.497 4.668 5.511 4.750 3.288 3.534 3.893

Tab.8

Local thermal resistance of down jacket system with fill weight of 180 g/m2 under different deformation levels"

形变水平 不同部位热阻/clo
UC UB LC LB WA WB RA RB
无形变 3.289 4.365 6.538 6.295 5.482 4.204 3.492 4.533
低形变 3.283 4.526 6.324 6.611 6.041 4.410 3.764 4.600
中形变 3.327 4.518 6.041 6.446 5.832 4.385 3.731 4.350
高形变 3.300 4.231 5.156 5.503 5.050 3.873 3.575 3.260

Tab.9

Area weight of different parts of down jacket coverage section%"

上胸部 上背部 下胸部 下背部 腰腹部 腰臀部 右腹部 右臀部 左腹部 左臀部 右臂 左臂
10.89 9.38 12.06 7.49 5.54 5.96 5.78 3.25 5.78 3.25 15.31 15.31

Tab.10

Statistics of contribution of changes in local thermal resistance of down jackets to increase of total thermal resistance when deformation state changes"

羽绒服类型 无形变-低形变 低形变-中形变 中形变-高形变
正贡献数总和 负贡献数总和 正贡献数总和 负贡献数总和 正贡献数总和 负贡献数总和
薄型 86 241 383 190 733 32
普通型 263 160 884 0 89 385
中厚型 136 275 709 33 539 51
厚型 43 242 148 14 841 0

Tab.11

Partial volume change rate of down jacket system when deformation state changes%"

部位 无形变-低形变 低形变-中形变 中形变-高形变
薄型 普通型 中厚型 厚型 薄型 普通型 中厚型 厚型 薄型 普通型 中厚型 厚型
UC -10.25 -1.23 -21.61 -8.20 12.09 -3.22 16.25 -3.93 7.84 3.91 3.31 1.85
UB 9.02 -3.26 5.43 -7.34 -14.82 -12.22 -15.82 -9.19 3.75 1.67 -7.34 -3.58
LC -11.87 -10.79 -15.62 -4.82 -13.00 -12.83 -12.67 -14.52 -11.95 -15.91 -11.39 -20.33
LB -16.34 -22.26 -14.93 -23.78 -23.53 -12.14 -21.67 -16.90 -20.00 -35.28 -24.25 -27.39
WA -13.35 -11.91 -17.78 -7.60 -17.08 -10.92 -13.21 -16.26 -20.52 -27.18 -22.60 -25.17
WB -24.81 -24.89 -17.84 -29.70 -33.61 -28.50 -33.59 -22.86 -15.14 -32.03 -20.91 -16.60
RA 11.70 -11.27 -16.10 22.36 -29.78 -7.57 -18.62 -20.28 -17.20 -28.34 -25.06 -34.23
RB -17.71 -26.20 11.54 -45.51 -1.79 -0.28 -14.23 36.86 14.27 -0.56 -16.94 -16.25

Tab.12

Changes of local volume and thermal resistance of down jackets when deformation state changes"

部位 无形变-低形变 低形变-中形变 中形变-高形变
薄型 普通型 中厚型 厚型 薄型 普通型 中厚型 厚型 薄型 普通型 中厚型 厚型
UC Ⅲ Ⅲ Ⅱ Ⅲ Ⅳ Ⅲ Ⅳ Ⅱ Ⅳ Ⅰ Ⅰ Ⅳ
UB Ⅰ Ⅱ Ⅰ Ⅱ Ⅲ Ⅲ Ⅲ Ⅲ Ⅰ Ⅰ Ⅲ Ⅲ
LC Ⅱ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅱ Ⅲ Ⅲ
LB Ⅱ Ⅱ Ⅲ Ⅱ Ⅲ Ⅲ Ⅱ Ⅲ Ⅲ Ⅱ Ⅲ Ⅲ
WA Ⅲ Ⅱ Ⅱ Ⅱ Ⅱ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ
WB Ⅱ Ⅲ Ⅲ Ⅱ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ Ⅲ
RA Ⅰ Ⅱ Ⅱ Ⅰ Ⅱ Ⅲ Ⅲ Ⅲ Ⅲ Ⅱ Ⅱ Ⅲ
RB Ⅱ Ⅲ Ⅰ Ⅱ Ⅱ Ⅲ Ⅲ Ⅳ Ⅳ Ⅱ Ⅲ Ⅲ

Fig.4

Changes in volume of substances inside down jacket during deformation process"

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