Crystallized meta-aramid blend products for arc protection and excellent improvement of flash fire protection

摘要

Yarns suitable for use flash fire protection property is improved, the flame protection and arc, fabrics, and a garment, and 50 to 60 meta-aramid fiber (a) a crystallinity of at least 20% It consists essentially of 5 to 15 weight percent (c) para-aramid fiber weight percent, and 31 to 39 weight percent, (b) a modacrylic fiber, components (a), (b), and the percentages, ( with respect to the c), yarn, fabric, and clothing. In some embodiments, the condition that the meta-aramid fiber is maintained at 50% by weight of at least, and has been replaced by the antistatic fibers 1 to 3 weight percent of meta-aramid fiber containing carbon or metal may be. To provide thermal protection to burn body expected garment made from the yarn, would suffer if it is exposed to a flash fire exposure for 4 seconds with the wearer to conform to ASTM F1930 is less than 65% along with, I will maintain the arc rating of Category 2 that conform to NFPA 70E and ASTM F1959.