Segmented Aramid Panel Stack with Interstitial Threads
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Solution Overview
Problem
Existing bulletproof vests, while effective, often compromise on comfort and flexibility due to increased thickness and weight, which is a trade-off in protection and wearability.
Innovation Solution
A bulletproof vest design featuring a stack of aramid fabric panels with alternating reinforcing threads on the exterior, combining lightweight first panels made of para-aramid fibers with heavier second panels of Twaron or Kevlar fibers, embedded in thermoplastic material, to enhance protection without adding bulk or reducing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vest uses more panels and reinforcing threads to improve bullet protection, then the protection effectiveness is improved, but the thickness and weight increase, reducing comfort and flexibility
Solution Approach 1:
The vest is divided into multiple thin panels (10-15 first panels and 3-5 second panels) rather than using fewer thick panels. Each panel is separated by interlining material, creating a segmented structure that distributes the stopping force across many layers. This segmentation allows the vest to achieve high bullet protection effectiveness while keeping each individual panel thin and lightweight, resolving the contradiction between protection and weight.
Solution Approach 2:
The invention uses composite material structures combining aramid fabrics (first and second panels) with thermoplastic interlining material. The aramid panels provide ballistic resistance while the thermoplastic interlining provides structural support and panel separation. This composite approach enables the vest to achieve high protection effectiveness without excessive weight, as each material contributes its specific properties in a optimized combination.
2Reliability
If the vest uses more panels and reinforcing threads to improve bullet protection, then the protection effectiveness is improved, but the thickness increases, reducing flexibility and comfort
Solution Approach 1:
The vest structure is segmented into numerous thin panels (10-15 first panels and 3-5 second panels) separated by interlining material. This segmentation distributes the total thickness across many thin layers rather than using fewer thick panels. The interlining material acts as spacing elements that maintain panel separation while adding minimal thickness. This segmented approach achieves high bullet protection effectiveness while keeping the overall vest thickness minimal, resolving the contradiction between protection and thickness.
3Device complexity
If the reinforcing threads pass through multiple panels to simplify structure, then the device complexity is reduced, but the flexibility and comfort are compromised
Solution Approach 1:
The reinforcing thread system is segmented so that each thread is confined to a single second panel rather than passing through multiple panels. This segmentation simplifies the thread configuration within each panel while maintaining overall vest flexibility. The interlining material between panels provides structural connection without requiring complex through-threading, thus resolving the contradiction between structural simplicity and flexibility.
Solution Approach 2:
The function of connecting multiple panels is extracted from the reinforcing threads and assigned to the interlining material instead. The reinforcing threads are extracted to operate independently within each second panel, simplifying their configuration. This separation of functions allows the threads to maintain panel flexibility while the interlining provides structural integration, resolving the contradiction between simple thread configuration and vest flexibility.
4Reliability
If the vest uses heavier panels to improve bullet protection, then the protection effectiveness is improved, but the weight increases, reducing wearability
Solution Approach 1:
The ballistic protection function is segmented across 10-15 thin first panels and 3-5 second panels rather than using fewer heavy panels. Each panel uses lighter-weight aramid fabric, and the cumulative effect of multiple layers provides high bullet protection effectiveness. This segmentation distributes the weight across many thin layers, making the vest more wearable and comfortable while maintaining superior protection, resolving the contradiction between protection effectiveness and wearability.
Data Source
Figure 1~3
AI summary
The unit has an aramid fabric panel stack formed of a sub-stack of panels (1) and another sub-stack of panels (2). Each panel of latter sub-stack is provided with an associated reinforcement thread series. The thread series has a thread (3) alternatively passing from a side of the panel to another side of the panel without passing through the other panel or the panels of the former sub-stack. The latter sub-stack of panels is arranged between the former sub-stack of panels and the side turned towards the outside of the unit. The panels of one of the sub-stacks are made of an aramid fiber fabric such as Kevlar(RTM: light, strong para-aramid synthetic fiber) and Twaron(RTM: very strong, light para-aramid fiber) fabric.