Ballistic Laminate With Parallel Fiber Sublaminates
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Solution Overview
Problem
Existing ballistic protection structures face limitations in combining high bullet-stopping and trauma-reduction performance with flexibility due to issues such as fiber misalignment, resin properties, and structural cohesion, leading to suboptimal energy absorption and deformation characteristics.
Innovation Solution
A ballistic laminate comprising unidirectional textile sublaminates with a non-ballistic connecting layer, where the sublaminates are arranged at an angle of 90°+/−10° and pre-impregnated with resin, and through holes are introduced to enhance flexibility and breathability without compromising ballistic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional woven fabrics are used for ballistic protection, then structural cohesion is provided by crossing fibers, but fiber misalignment and reflection nodes reduce ballistic performance
Solution Approach 1:
The fabric is segmented into multiple unidirectional layers with fibers oriented at different angles (0°, 45°, 90°, etc.), where each layer maintains perfect fiber alignment independently rather than relying on woven intersections. This segmentation eliminates reflection nodes while distributing ballistic load across multiple oriented segments.
Solution Approach 2:
The invention uses composite construction combining multiple unidirectional fiber layers oriented at different angles, bonded together with resin matrices. This composite approach achieves both the alignment consistency of unidirectional layers and the multi-directional strength of traditional fabrics, eliminating the trade-off between cohesion and alignment.
2Strength
If unidirectional layers are superimposed at 90° angles with resin matrices, then fiber alignment is optimized for energy absorption, but structural deformability increases requiring additional protective films
Solution Approach 1:
The resin matrix formulation is designed with dynamic properties that provide flexibility during impact (absorbing deformation energy) while maintaining structural stability during service. The resin dynamically adjusts its mechanical properties based on the applied stress, being more compliant during impact and more rigid during normal use.
Solution Approach 2:
The invention optimizes resin matrix parameters including cross-linking density, molecular weight, and formulation composition to achieve the desired balance between flexibility and stability. By changing resin parameters rather than adding protective films, the structure maintains both energy absorption and inherent stability.
3Object-affected harmful factors
If adhesive films are added between layers to reduce trauma, then trauma reduction improves, but device complexity and manufacturing steps increase
Solution Approach 1:
The trauma-reducing adhesive function is merged into the structural resin matrix that already bonds the fiber layers together. The same resin that provides structural cohesion also provides trauma reduction through its energy-absorbing deformation characteristics, eliminating the need for separate adhesive film layers.
Solution Approach 2:
The resin matrix is designed to perform multiple functions simultaneously: structural bonding between layers, trauma reduction through controlled deformation, and flexibility provision. This multi-functionality eliminates the need for separate dedicated trauma-reducing layers, reducing overall structure complexity.
4Reliability
If outer surfaces are protected by additional films, then abrasion resistance improves, but device complexity and weight increase
Solution Approach 1:
The outer surface protection is achieved through a thin, flexible resin-rich coating layer that is integrated into the fabric structure during manufacturing. This thin protective layer provides abrasion resistance without the complexity of separate film applications, maintaining flexibility while protecting the fiber surfaces.
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 solution achieves superior ballistic performance, flexibility, and durability by optimizing fiber alignment, resin distribution, and structural cohesion, resulting in enhanced energy absorption and reduced trauma while maintaining high V50 values and flexibility.
Implementation Method 1
the sonic wave to be absorbed without reflections
Implementation Method 2
the speed at which 50% of projectiles are stopped by the fabric
Implementation Method 3
cohesion of the structure is ensured through the use of matrices/resins
Implementation Method 4
reflection nodes of the sonic wave responsible for absorption of the energy of the incident projectile
Data Source
AI summary
The present invention relates to a structure for the construction of ballistic protection that combines high projectile-stopping and trauma-reduction performance with high flexibility. A ballistic laminate comprising at least two pairs of unidirectional layers, with fibers parallel to each other, separated by a connecting layer, is produced. In a preferred embodiment, the ballistic structure includes a plurality of unidirectional ballistic yarn sublaminates. Each sublaminate comprises at least two unidirectional ballistic layers whose fibers are substantially parallel, i.e. oriented in the same direction: the two ballistic layers with parallel fibers are not in direct contact with each other but are separated (and held together) by a layer consisting, for example, of a film which is also adhesive. The sublaminates are then coupled together so that the unidirectional fibers of each sublaminate are substantially perpendicular to those of the adjacent sublaminate.