1.5D*38MM Aerogel Thermal Insulation Polyester Staple Fiber | Ultra-Light Cold Resistant High Warmth Retention Fiber for Winter Apparel & Outdoor Gear

Our 1.5D×38MM aerogel thermal insulation polyester staple fiber represents a new generation of high-efficiency cold-resistant functional fiber, bringing aerospace-grade aerogel thermal insulation technology into the textile field. Through an advanced melt blending process, nano aerogel particles are uniformly dispersed into the polyester fiber matrix, giving the fiber excellent thermal insulation performance unmatched by traditional fibers.

This innovative fiber features ultra-light weight, high warmth retention, slim profile, breathability, and wash resistance, making it the core raw material for upgrading high-end winter clothing, outdoor equipment, and functional home textiles.

Unlike traditional thermal insulation fibers that rely on thick fiber layers to trap static air for warmth, aerogel fiber builds a nano-scale thermal barrier from inside the fiber. Aerogel's unique nanoporous structure effectively immobilizes static air, greatly reducing heat conduction and convection, with thermal conductivity as low as ≤0.032 W/(m*K).

At the same thickness, its warmth retention effect is 2-3 times that of ordinary hollow polyester fiber, effectively resisting the invasion of external cold air and locking body heat, providing long-lasting and stable warmth protection for wearers in low-temperature and extreme cold environments.

The 1.5D ultra-fine denier design endows the fiber with an extremely soft and delicate hand feel. The finished thermal wadding or fabric has no stiff sensation, fits body curves well, and brings no sense of bondage or heaviness. Compared with traditional thick thermal clothing, aerogel fiber achieves the same warmth retention effect with 50% thinner thickness.

The porous structure and hydrophilic treatment ensure excellent moisture permeability, quickly discharging sweat during exercise, avoiding stuffiness and dampness, and maintaining a dry and comfortable thermal state.

• Outdoor & Winter Apparel: Down jacket lining, ski suit insulation layer, cold-proof coat wadding, outdoor hiking thermal clothing, professional extreme cold workwear
• Bedding & Home Textile: Winter quilt filling, thermal mattress pad, warm pillow core, infant sleeping bag, household cold-proof cushion
• Shoes & Accessories: Winter shoe lining insulation cotton, snow boot filling, warm hat earmuffs, cold-proof gloves, thermal insole material
• Outdoor Camping Gear: Professional sleeping bag filling, tent thermal lining, camping insulation mat, cold-proof sleeping bag liner
• Industrial & Special Protection: Low-temperature operation protective clothing, cold chain transportation insulation layer, building thermal insulation material, pipeline insulation wrapping
• Functional Textiles: Thermal underwear yarn, blended warm fabric, needle punched thermal cotton, automotive interior thermal insulation layer