Ballistic protection textile construction and method therefor using a tetra axial weave
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Solution Overview
Problem
Existing ballistic protection textiles face challenges in providing lightweight, comfortable, and high-performance protection while effectively dispersing and absorbing bullet energy, particularly in multi-axial arrangements where the areal density and fiber orientation play critical roles.
Innovation Solution
A tetra-axial weaving process on a dedicated loom interweaves longitudinal and cross fiber planes with alternating diagonal fibers, using high-toughness materials like para-aramide and UHMWPE, and incorporating a thermoplastic or elastomeric matrix for enhanced energy absorption and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-axial fiber arrangements are used to improve ballistic protection performance, then bullet energy dispersion is improved, but areal density increases reducing lightweight performance
Solution Approach 1:
The patent transitions from conventional 2D planar fiber arrangements to a 3D tetra-axial weave structure with fibers oriented at 0°, 90°, +45°, and -45° angles. This multi-dimensional arrangement enables bullet energy to be dispersed in multiple spatial directions simultaneously, achieving superior ballistic protection with reduced areal density compared to traditional multi-layer stacking approaches.
Solution Approach 2:
The invention employs composite fiber structures combining different fiber types (para-aramide, UHMWPE, and carbon fibers) within a single tetra-axial weave. This composite approach allows optimization of each fiber type's contribution to ballistic performance while maintaining lightweight characteristics, as each fiber type provides specific mechanical properties that complement the others in the multi-axial configuration.
2Reliability
If multiple fiber layers are overlaid to enhance energy absorption, then ballistic protection is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple fiber layers into a single integrated tetra-axial woven structure. Instead of separately manufacturing and assembling multiple unidirectional or bidirectional layers (which would require complex lamination and stitching processes), the invention weaves all four fiber orientations simultaneously in a single fabric structure, dramatically simplifying manufacturing while maintaining enhanced energy absorption capabilities.
Solution Approach 2:
The tetra-axial weave segments the energy absorption function across four distinct fiber orientations, with each orientation group (0°, 90°, +45°, -45°) contributing to absorbing impact energy from different incident angles. This segmentation allows the fabric to handle multi-directional impacts more effectively than conventional layered structures.
3Strength
If fiber orientation is optimized for ballistic protection, then penetration resistance is improved, but fabric flexibility and comfort are reduced
Solution Approach 1:
The patent applies local quality by assigning specific fiber orientations to specific functional requirements: 0° and 90° fibers provide tensile strength for penetration resistance, while +45° and -45° fibers enhance shear resistance and flexibility. This localized functional assignment allows the fabric to simultaneously achieve high penetration resistance and adequate flexibility for wearer comfort.
Solution Approach 2:
The tetra-axial weave structure provides dynamic response to applied loads, with fibers in different orientations engaging at different stages of impact. During normal wear, the fabric maintains flexibility through the interplay of diagonal fibers. During ballistic impact, the multi-axial structure dynamically redistributes stresses, with each fiber orientation group activating to resist the specific stress state generated by the impact.
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 novel textile construction effectively disperses bullet impact energy, providing reliable and improved ballistic protection with reduced weight and enhanced comfort, as demonstrated by experimental tests showing superior trauma absorption and reduced layer perforation across various calibers.
Implementation Method 1
incorporating a thermoplastic or elastomeric matrix for enhanced energy absorption and distribution
Implementation Method 2
A tetra-axial weaving process on a dedicated loom interweaves longitudinal and cross fiber planes with alternating diagonal fibers
Data Source
AI summary
A novel multiple orientation construction for the ballistic protection, the process for making it and the main ballistic results obtained thereby. Said construction comprises at least a textile element and one or more thermoplastic or thermosetting based elements. The first textile element (1) comprises textile fibers. The second element (2) may comprise thermoplastic, thermosetting, rubber or polymeric elastomer based matrix arrangements or thermoplastic films for adjusting the textile construction characteristics according to the intended applications and for assisting in reducing bullet impact damages. The above elements jointly cooperate in absorbing and spreading a bullet impact stress.