FR Threads

XM-60 is a high-tenacity sewing thread spun from 100% meta-aramid staple fiber. The 30S/3 three-ply construction delivers the seam strength, abrasion resistance and dimensional stability required for protective workwear that must survive repeated industrial laundering and high-temperature exposure.[show_more more="Show more" less="Show less" color="#629e11" align="left" ]Meta-aramid’s flame-retardant property comes from the polymer itself, so the thread will not melt or drip and its FR performance is permanent — well-suited to pairing with both inherent FR fabrics and durable FR-treated fabrics across the XM Fireline range. Tested and certified XM-60 30S/3 has been independently tested by AITEX (Spanish Textile Research Institute, ENAC-accredited laboratory) against the sewing thread requirement of EN 61482-2:2020 — the European standard for protective clothing against the thermal hazards of an electric arc.

Test method: EN ISO 3146:2000 Method B (Differential Scanning Calorimetry per EN ISO 11357-3:2018) Pass criterion: No melting at 260 °C ± 5 °C

XM-60 result: No melting observed across the full test range up to 300 °C

Report reference: AITEX 2025EP0638 (issued 28 February 2025)
This certifies XM-60 as suitable for use in structural seams of arc-flash protective clothing built to EN 61482-2:2020, and confirms its thermal stability for use in garments certified to EN ISO 11612 (heat & flame), EN ISO 11611 (welding), EN 469 (firefighter clothing) and NFPA 2112 / NFPA 70E systems. XM-60 also holds OEKO-TEX® Standard 100 certification, verifying it is free from harmful substances and safe for prolonged skin contact.

Key performance
Does not melt — verified to 300°C in DSC testing Char temperature ≈ 400°C, decomposition above 425°C (typical of meta-aramid) Inherently flame retardant — FR performance is permanent and laundry-stable Compatible with all major FR fabric systems: meta-aramid, para-aramid, FR cotton (inherent and treated), FR cotton/nylon, modacrylic blends and PBI

Typical applications

Structural seams in:

• arc-flash suits and coveralls for utility and electrical workers
• firefighter station- and structural-wear
• oil, gas and petrochemical FR coveralls
• welder’s clothing
• military combat uniforms
• molten-metal aprons and foundry PPE.[/show_more]

Key features: Flame Retardant, Sewing Threads

Certifications: