Far-Infrared / Thermal Storage Fibers
Functional / Ceramic-Enhanced Radiant Heat (远红外纤维)
Quick Facts
| Type | Functional fiber; ceramic microparticles incorporated into polymer → absorb solar/body radiation → re-emit as far-infrared (4–14 μm wavelength) → perceived warmth |
| Active materials | Group IV transition metal carbides: ZrC, TiC, HfC — absorb visible/near-IR solar radiation and convert to far-infrared; also: tourmaline, alumina, silica, and various oxide ceramics |
| Mechanism | Photothermal conversion: solar radiation → ceramic particle absorbs → electrons excited → relaxation emits far-infrared; human body also emits FIR (~9 μm) → ceramic reflects back → reduced radiative heat loss |
| Claimed benefits | Thermal storage and re-radiation for warmth (verified); improved blood circulation, anti-inflammatory, pain relief, immune function (claimed — limited rigorous clinical evidence; popular in Asian health-textile markets) |
Properties
| Property | Rating | Engineering implication |
|---|---|---|
| Thermal retention | ★★★★☆ | Ceramic-containing fibers show 2–4°C higher surface temperature under IR imaging vs. control; measurable warmth effect |
| Permanence | ★★★★★ | Ceramic particles embedded in fiber matrix — permanent; no washing off; lifelong functionality |
Applications
| Application | Form | Key criteria |
|---|---|---|
| Thermal underwear | Far-infrared polyester or acrylic staple; knitted | Warmth without bulk; health positioning; popular in Japan, Korea, China markets |
| Bedding / blankets | Far-infrared polyester filling or fabric | Thermal comfort; marketed with health/wellness claims; premium positioning |
| Sportswear / recovery wear | Far-infrared fabric; compression + thermal | Post-exercise muscle recovery (claim); improved circulation (claim); popular with professional athletes in Asia |
Summary
Far-infrared fibers use embedded ceramic particles to convert light to heat and reflect body heat — producing a measurable, permanent warming effect. The health claims (circulation, recovery) are commercially popular but scientifically less established than the thermal effect. See the Textile Material framework.