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High-Performance Flame-Retardant Composite Fabric Developed Using Aramid and FR-PET
Beijing, China - October 16, 2025: Researchers have developed a high-performance flame-retardant composite fabric based on aramid fiber and flame-retardant polyester (FR-PET), addressing the growing demand for advanced personal protective equipment (PPE) in extreme environments such as industrial settings, fire rescue, aerospace, and military applications. The composite fabric integrates the unique properties of aramid and FR-PET to achieve lightweight, high protection, and multi-functionality.
Aramid fibers, including meta-aramid (e.g., Nomex®) and para-aramid (e.g., Kevlar®), are known for their exceptional thermal stability, flame resistance, and mechanical strength. Meta-aramid, with a limiting oxygen index (LOI) of 29-31% and decomposition temperature above 500°C, provides excellent heat reflection and radiation resistance. FR-PET, modified through copolymerization or flame retardant addition, offers cost-effectiveness, easy processability, and an LOI of 28-32%, along with minimal melting dripping compared to conventional PET.
The composite fabric features a multi-layer structure optimized for performance: an outer layer of 100% meta-aramid plain weave (180-220 g/m²) for flame and radiation resistance; a middle layer of aramid/FR-PET blended twill fabric (60/40 ratio, 150-180 g/m²) for thermal insulation and structural support; and an inner layer of 100% FR-PET knitted mesh (100-130 g/m²) for moisture wicking and reduced secondary burns. An optional PTFE microporous membrane layer can be added for water resistance, breathability, and chemical penetration protection.
Key manufacturing processes include fiber surface activation (low-temperature plasma treatment for aramid, alkali reduction for FR-PET) to enhance interfacial bonding, optimized weaving techniques (rapier looms for aramid blends, air-jet looms for FR-PET), and advanced lamination technologies. Performance tests show the fabric meets the requirements of China's national standard for fire-fighter protective clothing (GA 10-2014), demonstrating excellent adaptability in practical applications.