Manufacture of Nonwoven Fabrics and Investigation of Low-Velocity Impact Behavior Using Fine Denier Aramid Staple Fibers 


Vol. 54,  No. 6, pp. 403-411, Dec.  2017
10.12772/TSE.2017.54.403


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  Abstract

Needle-punched aramid nonwoven fabrics were manufactured with a focus on the fiber fineness, fiber length, and needle punching density to improve the absorption and distribution of impact energy, and their physical properties, structure, and low-velocity impact behavior were investigated. In addition, thermal-bonded aramid nonwoven fabrics were manufactured with different mixing ratios of the binder fibers (LM-PET), and their impact resistance properties were analyzed. The tensile strength of the aramid nonwoven fabrics were observed to increase with an increase in the needle punching density. In comparison with woven fabrics of the same weight, the nonwoven fabrics exhibited higher energy absorption capability. This can be attributed to the higher deformability of the nonwoven fabrics that arises from an easily disordered fiber network of the mechanically entangled structure when under impact. Most of the impact energy was dissipated by frictional sliding and deformation of the fibers without significant fiber fracture. Mixing the binder fibers improved the impact absorption due to physical entanglement caused by the needle punching and adhesion between the fibers and the web in the binder fibers.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)