Influence of Immersion Conditions on The Tensile Strength of Recycled Kevlar®/Polyester/Low-Melting-Point Polyester Nonwoven Geotextiles through Applying Statistical Analyses

Jing-Chzi Hsieh,Jia-Horng Lin,Yi-Jun Pan,Wen-Hao Hsing,Ching-Wen Lou,Jia-Hsun Li,Chien-Teng Hsieh

doi:10.3390/app6050133

Abstract

The recycled Kevlar®/polyester/low-melting-point polyester (recycled Kevlar®/PET/LPET) nonwoven geotextiles are immersed in neutral, strong acid, and strong alkali solutions, respectively, at different temperatures for four months. Their tensile strength is then tested according to various immersion periods at various temperatures, in order to determine their durability to chemicals. For the purpose of analyzing the possible factors that influence mechanical properties of geotextiles under diverse environmental conditions, the experimental results and statistical analyses are incorporated in this study. Therefore, influences of the content of recycled Kevlar® fibers, implementation of thermal treatment, and immersion periods on the tensile strength of recycled Kevlar®/PET/LPET nonwoven geotextiles are examined, after which their influential levels are statistically determined by performing multiple regression analyses. According to the results, the tensile strength of nonwoven geotextiles can be enhanced by adding recycled Kevlar® fibers and thermal treatment.

Highlights

Nonwoven geotextiles are commonly used in geotechnical, hydraulic engineering, and environmentally protective fields, and have functions of filtration, drainage, separation, protection, Appl
The analyses indicate that in comparison of the four combinations of T1 P1, T1 P2, T1 P3, and T2 P1, the experimental groups have a statistically significant higher tensile strength than the control group
This study proposes synthesizing recycled Kevlar® fibers, Low-melting-point PET (LPET) fibers, and PET fibers to successfully create recycled Kevlar® /PET/LPET nonwoven geotextiles

Summary

Introduction

Nonwoven geotextiles are commonly used in geotechnical, hydraulic engineering, and environmentally protective fields, and have functions of filtration, drainage, separation, protection, Appl. Sci. 2016, 6, 133 and reinforcement [1,2,3,4]. Thermoplastic materials are made into geotextiles via mechanical or chemical bonding methods. The used synthetic fibers include polypropylene (PP), polyester (PET), polyethylene, polyvinyl chloride, and polyamide, and PP and PET are the most commonly used. In comparison to PP, PET has greater mechanical properties, lower creep property and better thermal resistance. PET has a melting point of 259–269 ̋ C [5,6]

Methods

Results

Conclusion