Denim knowledge

Fabric Singeing & Bio-Polishing

Estimated Reading Time: ~4 minutes

Process Principle

The singeing process removes surface fuzz through precise thermal control.
When flat fabric passes through gas flames (800–1000 ℃) or heated copper rollers at controlled speeds (90–120 m/min), protruding fibers are instantly carbonized.
Temperature settings (320–400 ℃ for cotton) and speed coordination ensure effective fuzz removal while preserving base yarn integrity.

Process Comparison

Singeing Bio-Polishing
Heat/Treatment Instant heat (0.1–0.5 s) Enzymatic treatment (45–60 min)
Fiber Suitability Universal application Cellulose fiber preferred
Pilling Resistance +4 +3
Strength Loss <3% 8–12%

Integrated Process

  • Pretreatment: Scouring → Bleaching → Mercerizing (cotton)

  • Singeing: Dual-side treatment (2 front/2 back burners)

  • Light Polishing: Acid cellulase (0.5–1.2% o.w.f)

  • Finishing: Heat-setting (160 ℃ × 30 s) → Mechanical softening

Technical Benefits

Testing shows the combined process achieves:

  • 82% fuzz density reduction

  • 4.5 pilling resistance rating (ISO 12945-1)

  • 92% tearing strength retention

  • 35% smoothness improvement (KES evaluation)

Technical Support

Need customized solutions?
Contact LY Denim experts for:
▸ Process optimization
▸ Cost analysis
▸ Sample comparison

📩 Email: malone@lydenim.com

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