Basalt-PMMA Ballistic Composite Panels With UV-Resistant Layers
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Solution Overview
Problem
Current composite-based ballistic solutions for interior applications, such as those used in aircraft cockpits, suffer from disadvantages like high cost, UV sensitivity, and the need for sustainable alternatives that provide cost reduction, weight reduction, and improved UV resistance.
Innovation Solution
A composite panel comprising basalt fibers, aramid fibers, and a polymer matrix of PMMA, with in-situ polymerization of acrylate monomers, and optionally mineral additives like copper or aluminum, forming a thermoplastic matrix that is recyclable and provides enhanced mechanical performance and UV resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aramid fabric and thermoset resin are used for ballistic protection, then ballistic resistance is achieved, but UV sensitivity and high cost occur
Solution Approach 1:
The patent changes the resin type from thermoset to thermoplastic PMMA, which fundamentally alters the material's UV resistance parameters. PMMA is inherently UV stable and does not degrade like thermoset resins, thereby eliminating UV sensitivity while maintaining ballistic protection
Solution Approach 2:
The patent creates a composite material system combining basalt fibers with PMMA thermoplastic resin. This composite leverages the high strength-to-weight ratio of basalt fibers and the UV stability of PMMA to achieve both ballistic resistance and UV durability, replacing the problematic aramid/thermoset combination
2Reliability
If aramid fabric and thermoset resin are used for ballistic protection, then ballistic resistance is achieved, but high cost occurs
Solution Approach 1:
The patent employs basalt fibers, which are generally less expensive than aramid fibers like Kevlar. Basalt is a naturally occurring mineral that can be produced at lower cost, providing a more economical alternative while maintaining the required ballistic protection performance
Solution Approach 2:
Switching from thermoset resin to thermoplastic PMMA resin changes the manufacturing process parameters to allow for more cost-effective production. Thermoplastics can be processed using simpler, more economical methods compared to thermoset curing processes, reducing overall manufacturing cost
3Reliability
If aramid fabric and thermoset resin are used for ballistic protection, then ballistic resistance is achieved, but weight reduction is hindered
Solution Approach 1:
The patent uses basalt fiber/PMMA composite materials that offer superior strength-to-weight ratio compared to traditional aramid/thermoset composites. The thermoplastic PMMA matrix provides lighter weight while maintaining structural integrity, enabling weight reduction without sacrificing ballistic protection
Solution Approach 2:
The change from thermoset to thermoplastic resin system alters the density and weight characteristics of the composite. Thermoplastic PMMA has lower density than thermoset resins, contributing to overall weight reduction while maintaining the required mechanical properties for ballistic resistance
4Reliability
If conventional composite materials are used, then ballistic protection is provided, but sustainable and recyclable solutions are lacking
Solution Approach 1:
The patent transitions from thermoset resin (cross-linked, irreversible) to thermoplastic PMMA resin (meltable, reversible). This parameter change enables the composite to be melted and reformed, providing a straightforward recycling pathway where the entire composite structure can be recovered and reused, significantly improving sustainability
Solution Approach 2:
The thermoplastic nature of PMMA allows for easy recovery and recycling of the composite materials. The resin can be melted down and reused, and fiber reinforcement can be recovered, creating a circular economy approach that reduces waste and environmental impact compared to thermoset composites that cannot be recycled
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 composite panel achieves lightweight, cost-effective ballistic protection with improved UV resistance and mechanical strength, meeting aviation standards for ballistic resistance and recyclability, while reducing the need for separate adhesive layers.
Implementation Method 1
the PMMA is formed by in-situ polymerization of at least a plurality of acrylate monomers
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A composite panel includes woven fabrics and a polymer composite. The polymer composite includes Poly(methyl methacrylate) (PMMA). The woven fabrics includes basalt fibers. The basalt fibers are mineral-additive modified. Mineral-additive modified basalt fiber based PMMA composites are used for ballistic applications. Alternatives layer of aramid fabric and mineral additive modified basalt fabric based PMMA composites are also used for UV resistant ballistic applications. Lightweight sustainable sandwich ballistic panel are achieved by a reactive thermoplastic route.