Composite Yarn Fabric with UHMWPE Cores for Wind and Impact Resistance
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Solution Overview
Problem
Existing reinforced door curtains made of composite yarns, primarily using aramid fibers and PVC-covered polyester fibers, lack sufficient durability and resistance to strong winds and flying objects during hurricanes or typhoons.
Innovation Solution
A high-strength composite yarn fabric is developed by interweaving first composite yarns with a first core layer of ultra-high molecular weight polyethylene and a first wrapping layer, and second composite yarns with a second core layer of polyester fiber and a second wrapping layer, both with specific denier and material compositions, enhancing tensile and tearing strengths in both warp and weft directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing composite yarns (aramid fibers and PVC-covered polyester fibers) are used to make reinforced door curtains, then the curtain has a specific physical strength, but the durability and resistance to strong winds and flying objects are insufficient
Solution Approach 1:
The patent uses composite yarns consisting of a core layer and a wrapping layer, where the core layer is made of ultra-high molecular weight polyethylene fibers and the wrapping layer is made of polyester fibers. This composite structure combines the high strength-to-weight ratio of ultra-high molecular weight polyethylene with the durability and flexibility of polyester, achieving both high physical strength and long-term durability under strong wind and impact conditions
Solution Approach 2:
The patent specifies precise parameter ranges for the composite yarns, including denier values (first composite yarn: 5000-8000 D, second composite yarn: 7000-10000 D), molecular weight of ultra-high molecular weight polyethylene (350,000-900,000), and fiber content ratios. These optimized parameters ensure the yarns achieve optimal balance between strength, flexibility, and durability for withstanding hurricane-force winds and flying debris
2Strength
If aramid fibers are used in the reinforced door curtain, then the curtain has good physical strength, but the resistance to tearing and impact from flying objects is insufficient
Solution Approach 1:
The patent replaces aramid fibers with ultra-high molecular weight polyethylene fibers in the core layer, which have superior impact resistance and tearing strength. The composite structure of ultra-high molecular weight polyethylene core surrounded by polyester wrapping provides enhanced resistance to tearing and impact from flying objects while maintaining physical strength
Solution Approach 2:
The wrapping layer of polyester fibers acts as a protective cushion that absorbs and distributes impact forces from flying objects before they reach the core layer. This preliminary cushioning effect prevents direct impact on the ultra-high molecular weight polyethylene core, reducing tearing and enhancing overall impact resistance
Data Source
AI summary
A high-strength composite yarn fabric includes a plurality of first composite yarns and a plurality of second composite yarns. The first composite yarns and the second composite yarns are interwoven. Each first composite yarn has a first core layer and a first wrapping layer. The first core layer is ultra-high molecular weight polyethylene. The first wrapping layer wraps around the first core layer. T second composite yarn has a second core layer and a second wrapping layer. The second core layer is polyester fiber. The second wrapping layer wraps around the second core layer. The high-strength composite yarn fabric is knitted with the first composite yarns and the second composite yarns made of specific materials to enhance the physical strength and the durability of the high-strength composite yarn fabric.