Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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A Study on the Impact Behavior of Bulletproof Materials According to the Combining Method

  • Jihyun Kwon (Material & Component Convergence R&D Department, Korea Institute of Industrial Technology) ;
  • Euisang Yoo (Material & Component Convergence R&D Department, Korea Institute of Industrial Technology)
  • Received : 2022.10.20
  • Accepted : 2022.11.20
  • Published : 2022.12.31
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Abstract

Representative bulletproof materials, such as aramid or ultra-high molecular weight polyethylene(UHMWPE), have excellent strength and modulus in the plane direction but are very vulnerable to forces applied in the thickness direction. This paper reports a study on the effects of reinforcement in the thickness direction when bulletproof composite fabrics are prepared to improve their performance. Aramid and UHMWPE fabrics were combined using the film-bonding, needle-punching, or stitching methods and then subjected to low-velocity projectile and ball-drop impact tests. The results of the low-velocity projectile test indicated that the backface signature(BFS) decreased by up to 29.2% in fabrics obtained via the film-bonding method. However, the weight of the film-bonded fabric increased by approximately 23% compared with that obtained by simple lamination, and the fabric stiffened on account of the binder. Flexibility, light weight for wearability, and excellent bulletproof performance are very important factors in the development of bulletproof materials. When the needle-punching method was used, the BFS increased as the fibers sustained damage by the needle. When the composite fabrics were combined by stitching, no significant difference in weight and thickness was observed, and the BFS showed similar results. When a diagonal stitching pattern was employed, the BFS decreased as the stitching density increased. By contrast, when a diamond stitching pattern was used, the fabric fibers were damaged and the BFS increased as the stitching density increased.

Keywords

Acknowledgement

본 연구는 민군협력진흥원의 민군기술이전사업 "탄소나노튜브(CNT)쉬트 적용 하이브리드 경량 방탄재 기반 경호용 방탄복 및 장비 실용화 기술개발(21-PD-CO0-2)"의 지원을 받아 수행된 연구입니다.

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