Layered Fiber Composite for Stab and Ballistic Resistance
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Solution Overview
Problem
Current materials fail to effectively combine stab and ballistic resistance due to the distinct mechanisms required for each, with existing solutions either lacking ballistic resistance or being impractical for industrial production.
Innovation Solution
A soft material comprising a stab-resistant layer with perpendicularly combined high-strength unidirectional fiber prepreg strips and a ballistic resistant layer with a 90° rotation between fiber layers, both adhered with biaxial stretching organic membranes, forming a sandwich structure for enhanced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a high strength fabric adheres a coating of solid rigid particles to defend knife points, then stab resistance is improved, but ballistic resistant function is lost
Solution Approach 1:
The protective material is divided into separate stab-resistant layers and ballistic-resistant layers, each optimized for its specific function. The stab-resistant layers contain solid rigid particles for knife point defense, while ballistic-resistant layers use high strength fabric for bullet defense, resolving the contradiction by allowing each layer to specialize rather than trying to combine both functions in a single homogeneous structure.
Solution Approach 2:
The invention uses composite material structures where stab-resistant layers (with solid rigid particles) are combined with ballistic-resistant layers (high strength fabric) in a layered composite. This allows the material system to exhibit both stab resistance and ballistic resistance simultaneously, with each component material contributing its specialized properties to the overall composite structure.
2Strength
If fabric is mixed with wire netting or twisted with stainless steel threads to defend incision, then cut resistance is improved, but ballistic resistant function is lost
Solution Approach 1:
The protective material is divided into separate stab-resistant layers and ballistic-resistant layers, each optimized for its specific function. The stab-resistant layers contain solid rigid particles for knife point defense, while ballistic-resistant layers use high strength fabric for bullet defense, resolving the contradiction by allowing each layer to specialize rather than trying to combine both functions in a single homogeneous structure.
Solution Approach 2:
The invention uses composite material structures where stab-resistant layers (with solid rigid particles) are combined with ballistic-resistant layers (high strength fabric) in a layered composite. This allows the material system to exhibit both stab resistance and ballistic resistance simultaneously, with each component material contributing its specialized properties to the overall composite structure.
3Strength
If two layers of fabric are tightly woven from low denier aramid yarn to achieve both stab and ballistic resistance, then both resistant properties are improved, but manufacturing cost increases
Solution Approach 1:
Different regions of the composite material have different qualities optimized for their specific functions. The stab-resistant layers use solid rigid particles embedded in fabric for cut and puncture resistance, while the ballistic-resistant layers use high strength fabric construction for bullet resistance. This local differentiation allows each layer to use the most cost-effective material and construction method for its specific purpose, rather than requiring expensive low denier yarn throughout the entire structure.
Solution Approach 2:
The invention uses composite material structures where stab-resistant layers (with solid rigid particles) are combined with ballistic-resistant layers (high strength fabric) in a layered composite. This allows the material system to exhibit both stab resistance and ballistic resistance simultaneously, with each component material contributing its specialized properties to the overall composite structure.
4Strength
If multilayers of HSHM-PE fabric and rubber are used to form stab-resistant layer, then stab resistance is improved, but processing difficulty increases
Solution Approach 1:
Different regions of the composite material have different qualities optimized for their specific functions. The stab-resistant layers use solid rigid particles embedded in fabric for cut and puncture resistance, while the ballistic-resistant layers use high strength fabric construction for bullet resistance. This local differentiation allows each layer to use the most cost-effective material and construction method for its specific purpose, rather than requiring expensive low denier yarn throughout the entire structure.
Solution Approach 2:
The invention uses composite material structures where stab-resistant layers (with solid rigid particles) are combined with ballistic-resistant layers (high strength fabric) in a layered composite. This allows the material system to exhibit both stab resistance and ballistic resistance simultaneously, with each component material contributing its specialized properties to the overall composite structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The material achieves both stab and ballistic resistance while maintaining a soft and lightweight structure, suitable for defensive vests, with improved breaking strength and cutting resistance.
Implementation Method 1
a biaxial stretching organic membrane selected from the group consisting of polypropylene membranes, polyester membranes, polyimide membranes or polyethylene terephthalate membranes is adhered to both sides of the stab-resistant layer with a solvent adhesive selected from the group of styrene-ethylene-ethylene-propylene-styrene polymer and maleic anhydride modified styrene-ethylene-butylene-styrene polymer as adhesive
Implementation Method 2
a polyethylene membrane is adhered to each side of the ballistic resistant layer with a solvent adhesive selected from the group consisting of styrene-ethylene-ethylene-propylene-styrene polymer, styrene-ethylene-butylene-styrene polymer and the mixture thereof
Data Source
AI summary
A stab and ballistic resistant material, comprising a stab-resistant layer and a ballistic resistant layer, wherein the stab-resistant layer comprises at least one layer, wherein each layer is constituted of two units, each of which is formed from perpendicularly combined high strength and high module unidirectional fiber prepreg strips, adjacent units are combined with rotated 45°, and the stab-resistant layer has membranes adhered to both sides; the ballistic resistant layer comprises at least one layer, wherein each layer is constituted of two units, each of which is formed from perpendicularly combined unidirectional fiber prepreg strips, adjacent units are combined with rotated 90°, and the ballistic resistant layer has membranes adhered to both sides. The invention also provides a method for preparing the above stab and ballistic resistant material. The stab and ballistic resistant material of the invention functions to defend both stabs and bullets, which makes stab and ballistic resistant vest to be lighter, more efficient in protection, and easy to produce.