Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 52-57.doi: 10.13475/j.fzxb.20190204106

• Textile Engineering • Previous Articles     Next Articles

Tensile strength of polyester/ramie nonwoven composite applied on pipeline rehabilitation

FU Lisong1, ZHANG Shujie1(), WANG Rui1,2, YANG Zhaowei1, JING Mengke1   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tiangong University, Tianjin 300387, China
  • Received:2019-02-25 Revised:2019-11-25 Online:2020-02-15 Published:2020-02-21
  • Contact: ZHANG Shujie E-mail:zhangshujie@tjpu.edu.cn

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Abstract:

In order to reduce the requirements of polyester resources hence the petroleum resources, polyester/ramie hybrid nonwoven composites were prepared. It was found that hybridizing polyester and ramie would have certain effect on the tensile strength of the pipeline after lining construction and repair. In this paper, the formulae for calculating the critical hybrid ratio and tensile strength of polyester/ramie nonwovens lining composites for pipeline repairing were established based on the law of mixing of composite materials and Hooke's law. The theoretical ratio was found to be 0.177 and the experimental ratio was around 0.2. The experimental tensile strength was basically consistent with the theoretical prediction. The results show that the formula for calculating critical hybrid ratio and tensile strength are practically useful, which can provide theoretical basis for the design and manufacture of tubular nonwovens composites for repairing damaged pipelines with pipes with large pipe diameters, such as non-pressure sewage and drainage.

Key words: pipeline rehabilitation, polyester/ramie nonwoven composite, hybrid theory, critical volume fraction, tensile strength

CLC Number: 

  • TB332

"

Fig.2

Theoretical tensile strength of polyester/ramie nonwoven composites with different volume fractions of polyester fiber"

Tab.1

Tensile strength of polyester/ramie nonwoven composites with different volume fractions of polyester fiber"

涤纶体积
分数/%		 拉伸强度/MPa 涤纶体积
分数/%		 拉伸强度/MPa
纵向 横向 纵向 横向
0 53.44 36.84 40 56.45 34.74
10 48.85 30.96 60 64.83 45.86
20 42.69 27.36 80 75.89 52.55
30 51.04 29.56 100 88.64 58.36

Fig.3

Tensile strength of composites near 20% of volume fraction of polyester fiber"

Fig.4

Longitudinal(a) and transverse (b) fracture morphology of polyester/ramie nonwoven composites(×50)"

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