Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 98-104.doi: 10.13475/j.fzxb.20210802407

• Textile Engineering • Previous Articles     Next Articles

Preparation and properties of hollow pie-segmented high shrinkage polyester/polyamide 6 microfiber nonwovens

DUO Yongchao1, QIAN Xiaoming1(), GUO Xun1, GAO Longfei1, BAI He1,2, ZHAO Baobao3   

  1. 1. School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, China
    2. School of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China
    3. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2021-08-02 Revised:2021-11-17 Online:2022-02-15 Published:2022-03-15
  • Contact: QIAN Xiaoming E-mail:qxm@tiangong.edu.cn

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Abstract:

Aiming at the problems of low fiber splitting rate and poor drapability of hollow pie-segmented microfiber nonwoven, high shrinkage polyester/polyamide 6 microfiber nonwovens with different areal densities were prepared by bicomponent spunbond spunlace technology with high shrinkage polyester (HSPET) and polyamide (PA6) as raw materials. The effect of heat shrinkage treatment on fiber splitting rate, drapability, softness, air permeability, filtration efficiency and mechanical properties of the nonwovens were analyzed. The results show that when the spunlace pressure was constant, the fiber splitting rate of the HSPET/PA6 nonwoven fabric is increased by 48.1% compared with that of PET/PA6 nonwoven. After heat shrinkage treatment, the shrinkage rate of HSPET/PA6 nonwoven reaches 20.31%. Heat shrinkage promotes the fiber splitting, resulting in a relatively fluffy internal structure of the nonwoven, offering drapability improvement. The filtration efficiency of HSPET/PA6 nonwovens was increased as the increased fiber splitting rate. The filtration efficiency of HSPET/PA6 nonwovens was close to 100% for particles with size greater than or equal to 1.5 μm when the areal density of the nonwoven was 140 g/m2, but the filtration efficiency of HSPET/PA6 nonwovens was reduced after heat shrinkage treatment.

Key words: high-shrinkage polyester/polyamide 6 microfiber, hollow pie-segmented fiber, spunbond spunlace technology, heat shrinkage, nonwovens

CLC Number: 

  • TS174.8

Fig.1

SEM images of HSPET/PA6 hollow segmented pie composite fibers. (a) Cross-section of undrafted fibers; (b) Surface of drafted fibers"

Fig.2

Diameter distribution of HSPET/PA6 hollow segmented pie composite fibers"

Tab.1

Basic properties of hollow segmented pie fibers"

试样名称 收缩率/% 断裂强
力/cN		 断裂伸
长率/%
沸水 干热
HSPET/PA6 12.27 10.57 5.46 80.42
PET/PA6 1.23 1.09 6.74 61.47

Fig.3

SEM images of HSPET/PA6 nonwovens before and after shrinkage. (a) Surface before shrinkage;(b) Cross-section before shrinkage; (c) Surface after shrinkage;(d) Cross-section after shrinkage"

Fig.4

Fiber splitting rate of nonwovens with different area densities"

Tab.2

Shrinkage of bicomponent spunbonded spunlace nonwovens"

面密度/
(g·m-2)		 沸水收缩率/% 干热收缩率/%
PET/PA6 HSPET/PA6 PET/PA6 HSPET/PA6
80 1.234 20.31 1.056 16.29
120 1.402 20.18 1.034 16.25
140 1.561 19.67 1.214 15.61

Fig.5

Porosity (a) and air permeability (b) of nonwovens"

Fig.6

Filtration efficiency of nonwoven fabrics with different area densities"

Fig.7

Filtration resistance of nonwoven fabrics with different area densities"

Fig.8

Softness of nonwovens fabrics with different area densities"

Tab.3

Drapability of nonwovens fabrics with different area densities"

试样名称 80 g/m2 120 g/m2 140 g/m2
静态悬垂系数 动态悬垂系数 静态悬垂系数 动态悬垂系数 静态悬垂系数 动态悬垂系数
HSPET/PA6 65.48 79.34 80.34 86.99 85.52 90.22
干热收缩HSPET/PA6 73.02 82.59 84.14 87.45 89.95 92.74
沸水收缩HSPET/PA6 62.00 72.36 74.20 79.92 78.14 83.23
PET/PA6 73.80 82.70 85.69 89.43 91.56 94.57

Tab.4

Mechanical properties of nonwovens with different area densities"

试样名称 80 g/m2 120 g/m2 140 g/m2
断裂强力/N 断裂伸长率/% 断裂强力/N 断裂伸长率/% 断裂强力/N 断裂伸长率/%
纵向 横向 纵向 横向 纵向 横向 纵向 横向 纵向 横向 纵向 横向
HSPET/PA6 361.0 154.0 48.45 55.62 548.3 270.0 54.35 64.55 621.1 336.5 60.67 70.23
干热收缩HSPET/PA6 421.3 176.3 46.15 54.13 623.4 292.1 52.92 62.75 721.4 372.9 53.47 68.25
沸水收缩HSPET/PA6 408.3 206.0 53.35 62.85 611.3 289.3 58.95 68.60 675.2 374.5 61.88 72.32
PET/PA6 378.5 147.3 41.34 53.19 572.3 273.7 46.41 60.95 643.2 304.5 45.79 64.32
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