Aromatic Polyester Fabric Weave for Fire Protection
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Solution Overview
Problem
Current personal protective textiles, such as those used by firefighters, face challenges with comfort due to high surface mass, reduced durability, and poor resistance to abrasion, ultraviolet degradation, and humidity, while existing flame-retardant solutions compromise on comfort and performance.
Innovation Solution
A fabric incorporating aromatic polyester yarns, woven in a specific arrangement where the yarns are not visible on the outer side, providing excellent mechanical and fire-resistant properties while maintaining user comfort through a balanced weave that binds the yarns internally, preventing degradation and maintaining integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aromatic polyester yarns are used in personal protective textiles, then mechanical strength and fire resistance are improved, but abrasion resistance and color stability deteriorate
Solution Approach 1:
The patent uses composite materials by combining aromatic polyester yarns with other fiber types (such as cotton, polyester, or synthetic fibers) in a blended yarn structure. This allows the aromatic polyester to provide mechanical strength and fire resistance while the other fibers contribute abrasion resistance and color stability, creating a synergistic effect that overcomes the limitations of pure aromatic polyester textiles
Solution Approach 2:
The patent applies local quality by treating different regions of the textile differently - the aromatic polyester yarns are strategically positioned and treated to provide fire resistance where needed, while other portions of the textile are optimized for abrasion resistance and colorfastness. This may involve different yarn compositions in different layers or regions of the fabric structure
2Reliability
If flame-retardant chemical treatment is applied to cotton or cotton/polyester blends, then fire resistance is improved, but surface mass increases
Solution Approach 1:
The patent extracts the flame-retardant function from heavy chemical impregnation treatments and instead incorporates it through the intrinsic properties of aromatic polyester yarns. These yarns provide fire resistance through their molecular structure rather than heavy surface coating, significantly reducing the surface mass compared to traditional metallic salt impregnation methods while maintaining effective fire protection
Solution Approach 2:
The patent changes the fundamental parameter of how flame resistance is achieved - shifting from external chemical impregnation (metallic salts) to intrinsic molecular structure properties (aromatic polyester). This parameter change enables fire resistance with much lower surface mass, as the protective property comes from the yarn composition itself rather than added treatment layers
3Reliability
If para-aramid PPTA fibers are used in intimate mixture, then flame resistance and durability are improved, but abrasion resistance and UV resistance worsen
Solution Approach 1:
The patent creates composite materials by blending aromatic polyester yarns with other fiber types that complement their properties. The aromatic polyester provides flame resistance and mechanical strength, while the companion fibers (such as treated cotton or polyester blends) provide enhanced abrasion and UV resistance, creating a balanced composite textile that addresses all performance requirements
4Reliability
If high surface mass textiles are used for personal protection, then fire resistance is improved, but user comfort deteriorates
Solution Approach 1:
The patent fundamentally changes the parameter of fire resistance achievement from high surface mass impregnation to low surface mass intrinsic yarn properties. By using aromatic polyester yarns that provide flame resistance through their molecular structure rather than heavy surface treatments, the textile achieves effective fire protection with significantly reduced surface mass, thereby improving breathability, flexibility, and overall user comfort
Data Source
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AI summary
The present invention relates to a fabric comprising an arrangement of yarns arranged in a weave forming a right and wrong side of the fabric, said yarn arrangement comprising one or more warp yarns and one or more weft yarns, characterized in that at least one of said warp yarns and one or more weft yarns is an aromatic polyester yarn (5, 6), the other yarns (7, 8) being made of a material other than aromatic polyester, said aromatic polyester yarn being bonded to the other yarns within the weave such that this aromatic polyester yarn (5, 6) does not appear on the right side of the fabric. The present invention also relates to personal protective clothing comprising such a fabric.