Soft Body Armor Separator Layer Abrasion Resistance
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Solution Overview
Problem
Soft body armor, particularly those made from flexible materials, face challenges in enhancing abrasion resistance without compromising their ballistic properties and flexibility.
Innovation Solution
Incorporating a lightweight, thin, and flexible separator layer between stacks of woven and second fabric layers, which are not laminated to each other, allowing them to move freely and reducing abrasion while maintaining the armor's flexibility and ballistic effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If separator layers are laminated to fabric layers, then structural integrity is improved, but abrasion resistance deteriorates due to increased friction and heat generation
Solution Approach 1:
A PTFE-coated fabric layer is introduced as an intermediary between the separator layer and the ballistic fabric layer. The PTFE coating provides a low-friction interface that reduces abrasion and heat generation at the interface, while still maintaining structural integrity and preventing delamination of the composite structure.
Solution Approach 2:
The friction coefficient at the interface is reduced by applying a PTFE coating to the separator layer. This parameter change transforms the high-friction contact between fabric layers into a low-friction interface, significantly improving abrasion resistance while maintaining structural stability.
2Object-affected harmful factors
If separator layers are not laminated to fabric layers, then abrasion resistance is improved, but structural integrity deteriorates due to potential delamination
Solution Approach 1:
The PTFE-coated fabric layer serves as a mediator that provides both low-friction contact for abrasion resistance and sufficient adhesion to prevent delamination. The coating creates a controlled interface that balances these two opposing requirements.
Solution Approach 2:
The adhesion parameter at the interface is modified by the PTFE coating, which provides just enough bonding strength to maintain structural integrity during ballistic events while allowing the layers to slide freely during abrasion, thus preventing delamination without compromising abrasion resistance.
3Stability of the object's composition
If fabric layers are rigidly bonded, then structural integrity is improved, but flexibility and movement freedom deteriorate
Solution Approach 1:
The PTFE-coated separator layer acts as a flexible intermediary that allows relative movement between layers while maintaining structural integrity. The low-friction coating enables the layers to move freely with respect to each other, preserving flexibility and comfort during wear.
Solution Approach 2:
The interface between layers is designed to be dynamic rather than static. The PTFE coating allows the separator layer and ballistic fabric layer to move relative to each other in response to body movement, maintaining flexibility and comfort while still providing structural integrity during ballistic threats.
Data Source
AI summary
Flexible composite materials and soft body armor formed therefrom having enhanced abrasion resistance. The materials and armor include at least one first separator layer positioned between adjacent fabric layers, or between a fabric layer and a cover, where the separator layer spaces the adjacent fabric layers or the fabric layer and cover apart from each other without being laminated or otherwise attached or connected to either the layers or the cover such that they are free to move relative to each other.