Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 26-32.doi: 10.13475/j.fzxb.20190301507

• Fiber Materials • Previous Articles     Next Articles

Fabrication and properties of polypropylene/polyester bicomponent micro-nanofiber webs via melt blowing process

ZHEN Qi1, ZHANG Heng2(), ZHU Feichao3, SHI Jianhong4, LIU Yong5, ZHANG Yifeng1   

  1. 1. School of Clothing, Zhongyuan University of Technology, Zhengzhou, Henan 451191, China
    2. School of Textile, Zhongyuan University of Technology, Zhengzhou, Henan 451191, China
    3. College of Textile Science and Engineering & International Institute of Silk, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    4. Suzhou Doro New Material Technology Co., Ltd., Suzhou, Jiangsu 215600, China
    5. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
  • Received:2019-03-04 Revised:2019-11-24 Online:2020-02-15 Published:2020-02-21
  • Contact: ZHANG Heng E-mail:m-esp@163.com

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Abstract:

In order to improve the flexibility of pure polypropylene (PP) microfiber materials, polypropylene/polyester (PP/PET) bi-component micro-nanofibers were prepared by melt-blown blending processing using PET and PP chips. The melt flowing index and thermal properties of the materials were studied, and the morphological characteristics and flexibility of the samples were analyzed experimentally. The sample morphology shows a typical melt-blown fiber webs structure, and the fine and coarse fibers overlap in the horizontal direction forming a layer-by-layer morphology. Besides, the average fiber diameter decreases from 5.52 μm to 3.61 μm when the PET mass ratio increases from 8% to 15%. A clear phase interface is observed between PET and PP components in the bi-component fiber and PET exists in the form of fibers with diameters ranging from 10-100 nm. Furthermore, the flexibility score of the samples increases from 29.91 to 35.20 as PET content increases.

Key words: melt blowing nonwoven, micro-nano fiber, flexibility, polypropylene, polyester

CLC Number: 

  • TS176

Tab.1

Formula for sample preparation"

实验
编号		 PET质量
分数/%		 PP质
量分数/%		 实验
编号		 PET质量
分数/%		 PP质量
分数/%
1# 0 100 6# 10 90
2# 5 95 7# 10 90
3# 8 92 8# 12 88
4# 10 90 9# 15 85
5# 10 90

Fig.1

Manufacture technology of melt blowing samples"

Fig.2

Melt flow index varying with temperature"

Fig.3

DSC curve of cooling curves (a) and melting curves(b)of PP/PET composites with different PET contents"

Tab.2

Test result of sample properties"

样品
编号		 平均厚度/
mm		 面密度/
(g·m-2)		 孔隙率/
%
1# 0.554 63.49 87.41
2# 0.556 64.09 87.65
3# 0.559 64.73 87.78
4# 0.611 67.05 88.53
5# 0.327 33.52 89.29
6# 0.283 23.14 91.46
7# 0.261 16.42 93.43
8# 0.560 65.01 87.99
9# 0.562 65.45 88.12

Fig.4

SEM images of cross section of PP/PET bicomponent micro-nanofibers webs before (a) and after (b) finished by NaOH solution"

Fig.5

SEM images of surface of PP/PET bicomponent micro-nanofibers webs"

Fig.6

Relationship between average fiber diameters and polyester blending ratio"

Fig.7

Relationship between polyester blending ratio and resilience (a) and softness (b)"

Fig.8

Relationship between mass per unit area and resilience (a) and softness (b)"

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