Ballistic Shield Composites with Layered Fragment Resistance
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Solution Overview
Problem
Conventional ballistic resistant fabrics face limitations in resisting the penetration of both bullets and fragments, such as shrapnel, and often suffer from bulkiness and water absorption, which complicates their use in military and law enforcement applications where mobility and light weight are crucial.
Innovation Solution
The development of consolidated, layered composites comprising a first and second non-woven fabric with unidirectionally oriented high tenacity fibrous layers and a felt material with high tenacity fibers, optionally incorporating laminating film layers for enhanced protection and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional ballistic resistant fabrics are used to resist bullet penetration, then penetration resistance is improved, but fragment resistance deteriorates
Solution Approach 1:
The patent applies composite materials by combining two distinct fabric types: a first fabric with high bullet penetration resistance and a second fabric with high fragment resistance. These fabrics are layered and bonded together to create a composite structure that simultaneously provides both bullet and fragment protection, resolving the contradiction where single fabrics excel at one type of protection but fail at the other.
2Reliability
If felt material is used to resist fragment penetration, then fragment resistance is improved, but water resistance deteriorates
Solution Approach 1:
The patent combines felt material (providing fragment resistance) with water-resistant fabric layers in a composite structure. The water-resistant fabrics are positioned on the outer surfaces and between felt layers, creating a multi-layer composite that maintains fragment protection while blocking water absorption, thus resolving the contradiction between fragment resistance and water resistance.
3Reliability
If layered composite structure is implemented to resist both bullets and fragments, then overall protection is improved, but device complexity increases
Solution Approach 1:
The patent segments the protective structure into distinct functional layers: a first fabric layer for bullet resistance, a felt material layer for fragment resistance, and a second fabric layer for additional protection and water resistance. Each layer has a specific function, and they are bonded together in a systematic manner, making the complex multi-functional protection achievable through modular segmentation of responsibilities.
Data Source
AI summary
Consolidated, layered composites having high penetration resistance to both bullets and fragments are described. The composites comprise, in order, a first non-woven fabric comprising one or a plurality of unidirectionally oriented high tenacity fibrous layers, a felt material comprising high tenacity felt fibers, and a second non-woven fabric comprising one or a plurality of unidirectionally oriented high tenacity fibrous layers. The non-woven fabrics and intermediate felt material are consolidated at facing lateral surfaces.