COT-300-FR is a 100% cotton twill treated with THPC (Proban) ammonia-cure flame retardant finish — the most widely specified FR fabric for general industrial workwear worldwide. It offers a reliable balance of protection, comfort, and cost for welding, oil & gas, manufacturing, and mining applications.
300 GSM is the most versatile weight in the FR range — heavy enough for arc welding and industrial coveralls, light enough for year-round wear in most climates. The Twill 3/1 construction provides the abrasion resistance needed for daily industrial use while maintaining a clean professional appearance.
Treated FR vs. Inherent FR: This is a treated (durable) FR fabric. The flame retardant chemistry is bonded to the cotton fiber via the Proban ammonia-cure process. FR performance is guaranteed for 50+ industrial washes. For applications requiring unlimited wash durability, see our IFR (inherent) range.
Anti-Static (AS) Variant: Available with 1% conductive carbon fiber for environments where static discharge is a hazard (oil refinery, chemical plant, paint booth). Specify “COT-300-FR-AS” when ordering.
FR efficacy retained after 50+ industrial washes (ISO 15797)
Afterflame Time
≤2 seconds (EN ISO 15025 / GB/T 14644)
Afterglow Time
≤2 seconds
Char Length
≤100 mm
Shrinkage
≤3% after 50 washes (ISO 6330)
Colorfastness to Washing
Grade 4 (ISO 105-C06)
Colorfastness to Light
Grade 4 (ISO 105-B02)
Tensile Strength (Warp)
≥1000 N (ISO 13934-1)
Tear Strength (Weft)
≥25 N (ISO 13937-2)
Abrasion Resistance
≥25,000 Martindale cycles
Finishing
Pre-washed, heat-set, FR treated
Standards & Certifications
Standard
Status
GB 8965.1-2020
✅ Class B — China FR mandatory
EN ISO 11612 (A1, B1)
✅ Heat & flame — EU general industrial
EN ISO 11611 (Class 1)
✅ Welding — molten metal spatter
NFPA 2112
✅ Flash fire — North America
EN 1149 (AS variant)
✅ Anti-static (when ordered with 1% conductive fiber)
OEKO-TEX Standard 100
✅ Available upon request
Applications
Welding coveralls and jackets
Oil & gas refinery uniforms
Heavy industrial manufacturing
Mining and metallurgy
Foundry and forging
Utility and power plant maintenance
Chemical processing (with anti-static variant)
Available Finishes
Finish
Description
FR Treated (Standard)
THPC Proban — 50+ wash durability
FR + Anti-Static (AS)
99% Cotton + 1% Conductive Fiber — EN 1149
FR + Water-Repellent (DWR)
Spray rating ≥80 (ISO 4920)
FR + Hi-Vis
Fluorescent Yellow/Orange overlay
Color Options
Stock Colors (8 — held in continuous inventory):
Navy, Royal Blue, Orange, Red, Khaki, Grey, Black, White
Custom Dye: Pantone match, MOQ 500m per color.
Ordering Information
Parameter
Details
Stock color MOQ
200 meters per color
Custom color MOQ
500 meters per color
A4 sample swatch
Free, 3 working days
Bulk lead time (stock)
15–20 days
Bulk lead time (custom dye + FR)
25–30 days
Packing
Roll on tube, polybag, export carton
Shipping
FOB Shanghai / CIF / DDP — air, sea, express
Care Instructions
Step
Instruction
Washing
Machine wash 60°C, normal cycle — industrial wash compatible
Bleaching
Do not bleach — chlorine degrades FR treatment
Drying
Tumble dry medium, or hang dry
Ironing
High iron (200°C)
Industrial laundry
Compatible — 75°C max, alkaline detergents OK
⚠️ To maximize FR lifespan: Do not use chlorine bleach. Do not dry clean with PCE (perchloroethylene). FR treatment is stable through 50+ industrial alkaline washes at 60–75°C. After 50 washes, retest and retreat if required by safety protocol.
FAQ
Q: How long does the FR treatment last? A: The THPC Proban treatment maintains compliant FR performance through 50+ industrial laundry cycles. After 50 washes, the FR efficacy begins to gradually decline. Most industrial safety programs replace FR garments annually, which falls within this window. For unlimited wash durability, spec our IFR (inherent) range.
Q: Is the treated FR fabric safe for skin contact? A: Yes. The Proban process fixes the FR chemistry permanently to the cotton fiber. Free formaldehyde levels meet OEKO-TEX Standard 100 limits. The fabric is breathable and comfortable for all-day wear.
Q: What’s the difference between 300gsm and 330gsm for welding? A: 300gsm is the minimum for EN ISO 11611 welding certification. 330gsm provides additional thermal barrier and abrasion resistance for heavy welding (shipbuilding, structural steel). 410gsm is for extreme environments (foundry, molten metal).
Q: Can I get this fabric with anti-static? A: Yes. Add 1% conductive carbon fiber during spinning. Product code COT-300-FR-AS. Meets EN 1149. Ideal for oil refinery, chemical plant, paint shop.
Q: What is the most popular color for industrial FR programs? A: Navy and Royal Blue account for approximately 65% of all FR fabric orders. Orange is standard for high-visibility roles. Khaki and Grey are common in oil & gas.
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