Abstract: Regarding the insufficient thermal protection and comfort performance of forest fire‒proof clothing fabrics, a systematic study on the radiant heat protection and comfort performance of different fiber ratios, areal densities, single‒layer, double‒layer and coated fabrics was conducted, and the flame‒retardant performance, radiant heat protection performance, moisture permeability, air permeability, moisture resistance and thermal resistance of the samples were tested. The results show that the radiant heat protection performance of forest fire‒proof clothing fabrics is affected by raw materials, fabric structure and thickness. Due to the different crimps of the double‒layer fabric structure, the air cavities generated can effectively increase the radiant heat protection value. The thermal resistance and moisture resistance of the double‒layer fabric are greater than those of the single‒layer fabric, but its air permeability and moisture permeability are better than those of the single‒layer fabric; moisture resistance and thermal resistance are positively correlated with the thickness and air cavity size of the fabric; the flame‒retardant silicone coating can significantly improve the thermal protection value of the fabric, but its comfort is poor. In the design of lightweight forest fire‒proof clothing fabrics, attention should be paid to the balance between radiant heat protection performance and comfort performance.

Key words: forest fireproof clothing fabric, thermal protection performance, air permeability, comfort performance