Improving ballistic performance of Kevlar fabrics by resin treatment

Abstract

The aims of our investigation are to increasing inter-yarn friction by using polyurethane resin for superior ballistic protection without affecting the weight. In our concentration, we have used three different resin impregnated (25 × 25 cm) (Type-A), (4.5 × 4.5 cm) (Type-B), (9 × 9 cm) (Type-C) structure to treat our Kevlar fabrics and 12% wt. PU solution as resin. Grounded on our three different resin-impregnated fabric, we have been evaluated the weight increase percentage to analyze our core objectives maintaining the less weight escalation ratio with better ballistic performance. As the resin impregnation amount increases, the yarn or fiber dimensions lead to fabric stiffness. Later on, the yarn pull-out installation was created and the yarn (single and multiple) pullout tests were performed on both plain and resin impregnated structures to find the differentiation. The result of the investigation shows high-density resin-impregnated fabric indicates a higher pull-out force contrasted with those of low-resin impregnated fabric structure. Fabric displacement at max. Force during multiple-end pull-out indicated a higher fabric displacement (mm) rate contrasted with that of the single pull-out. Optical microscopic examination is done to observe the progressions on pulled out regions. During our observation, no implication variety was found in the surface at a specified loading rate except adjacent yarn displacement grounded on the amount of yarn pulled out. Utilization of resin impregnation builds the commitment of more yarns as the slippage of yarns is limited thus leads to the higher energy required rate. Finally, by ballistic perforated impact parameters, it is affirmed that expanding inter-yarn friction can improve ballistic performance of fabrics. Ultimately, it is concluded in the way that these new ballistic resin-impregnated structures come up with higher inter yarn friction, low expense, less weight, considerable stiffness of the fabric and the reliable ballistic performance on the finished result.