Antiballistic Stack With Delaminating Intermediate Layer
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Solution Overview
Problem
Existing anti-ballistic materials made from stacked layers of multifilament yarns are costly and complex to manufacture, necessitating a more affordable and simpler alternative that maintains effective anti-ballistic performance.
Innovation Solution
A stack comprising alternating layers of multifilament yarns and tapes, with a low adhesive content, allowing for flexible combinations such as crossplies and laminates, which can be produced at lower costs and with reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stacked layers of multifilament yarns are used for anti-ballistic applications, then anti-ballistic performance is achieved, but cost and manufacturing complexity increase
Solution Approach 1:
The patent segments the anti-ballistic structure into distinct functional layers: a first stack of multifilament yarns for primary impact resistance, a intermediate layer for energy distribution, and a second stack of multifilament yarns for secondary impact resistance. This segmentation allows each layer to be optimized independently while simplifying the overall manufacturing process through modular assembly.
Solution Approach 2:
The patent employs composite material construction by combining different types of multifilament yarns (e.g., aramid, UHMWPE, glass) in alternating stacks, each providing different mechanical properties. This composite approach achieves superior anti-ballistic performance while allowing selection of cost-effective material combinations and simplified processing techniques for each material type.
2Reliability
If stacked layers of multifilament yarns are used for anti-ballistic applications, then anti-ballistic performance is achieved, but manufacturing cost increases
Solution Approach 1:
The patent applies partial action by using a intermediate layer between the two stacks of multifilament yarns that performs a specific function (energy distribution and stress transfer) without requiring the full complexity of additional multifilament stacks. This intermediate layer can be made from simpler, more cost-effective materials while still achieving the required anti-ballistic performance through optimized layer configuration.
Solution Approach 2:
The patent utilizes parameter changes by varying the composition, thickness, and arrangement of the intermediate layer to optimize both performance and cost. By adjusting parameters such as the type of fibers in the intermediate layer, its thickness relative to the multifilament stacks, and its adhesive content, the patent achieves cost-effective manufacturing while maintaining superior anti-ballistic properties.
3Ease of manufacture
If low adhesive content is used in the stack, then manufacturing cost decreases and processing simplifies, but layer bonding may be insufficient
Solution Approach 1:
The intermediate layer acts as an intermediary between the two stacks of multifilament yarns, providing a controlled bonding interface. This intermediate layer contains adhesive components that facilitate proper bonding between layers while allowing for cost-effective manufacturing. The intermediary layer distributes stresses evenly and ensures adequate bond strength without requiring excessive adhesive in the multifilament stacks themselves.
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 stack achieves similar anti-ballistic performance to traditional multifilament yarn materials at a lower cost, with energy absorption through delamination upon impact, suitable for both soft and hard ballistic applications.
Implementation Method 1
energy absorption through delamination upon impact
Data Source
AI summary
A stack having at least one layer of tapes and at least one layer of multifilament yarn.