A cushion material is important for a substrate material to prevent serious damage under impacting. We need to dissipate and transmit the energy that can result in fracture propagating. In this study, we designed a sandwich structure that was made of nonwoven fabrics and laying filaments to dissipate and transmit the energy under impacting. We placed the compound nonwoven fabrics at the multi-layer Kevlar fabrics to form the Kevlar complex Fabric, and we evaluated the cushion effect by the impacting energy in the dropping impact test. We changed the content of low melted-temperature polyester staple fiber, content of polyester filament per unit area and needle punching density to discuss the influences of these parameters on the energy of fracture propagation of multi-layer Kevlar complex fabrics. The results show that the compound nonwoven fabric has better buffer effect at suitable process conditions. We expected that the compound nonwoven fabric could replace the original cushion material of the bulletproof vest.
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