Abstract: The outer fabric of the firefighting suit is mainly composed of aramid fibers, which have poor moisture absorption and moisture conductivity and a stiff feel. In order to solve the problem of poor comfort of the outer fabric of firefighting clothing, meta-aramid fibers and flame-retardant viscose fibers were blended to prepare aromatic viscose blended fabrics with blended ratios of 30/70, 40/60, 50/50, and 60/40, and their mechanical properties, flame retardancy, and breathability were tested. The results show that the meridional breaking strength of the fabrics with blended ratios of 50/50 and 60/40 is 916 N and 863 N, respectively, the continuous ignition time and smoldering time are 0 s, and the damage length is about 3 cm. Among them, the air permeability of the fabric with a blending ratio of 60/40 reached 78.91 mm/s, and the moisture permeability rate was 6 902 g/(m2.24 h). The fabrics prepared with a blended ratio of 60/40 meet the requirements of XF 10-2014, Firefighters' Fire Fighting Protective Clothing, which provides a certain reference for the development of comfortable flame retardant fabrics.

Key words: flame retardant fabric, firefighting clothing, aromatic viscose blend, flame retardant, comfort