Viscose Rayon
category
Viscose rayon is produced by dissolving cellulose (wood pulp, cotton linters) in sodium hydroxide and carbon disulfide to form viscose solution, which is extruded through spinnerets into sulfuric acid coagulation bath for regeneration. Annual global production exceeds 6 million tonnes.
Role
The most commercially significant regenerated fibre, widely used in apparel, home textiles, and nonwovens, offering cotton-like comfort with superior drape and dyeability at lower cost.
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Subtopics
- Viscose Manufacturing Process The viscose process involves: (1) steeping cellulose in 18% NaOH at 20°C for 1-3 hours forming alkal…
- Viscose Fibre Structure and Morphology Viscose fibres exhibit regenerated cellulose II crystal structure (antiparallel chains), crystallini…
- Viscose Physical and Chemical Properties Viscose demonstrates: tenacity 2.0-2.5 g/den (dry), 1.0-1.3 g/den (wet, 50% loss), elongation 15-25%…
- Viscose Variants and Modified Types Variants include: High Wet Modulus (HWM) rayon/Modal (higher DP 350-450, lower xanthate substitution…
- Viscose Environmental Impact and Sustainability Environmental concerns include: CS₂ emissions (toxic, 20-50 kg per tonne fibre in conventional plant…
- Viscose Quality Control and Testing Quality parameters monitored include: viscose solution viscosity (ball fall time 40-80 seconds), rip…
- Viscose vs. Cotton Comparison Compared to cotton: viscose offers superior drape (lower bending modulus), higher moisture absorptio…
- Viscose in Apparel and Fashion Apparel applications (60% of viscose consumption) include: dresses and blouses (drape, comfort), lin…
- Viscose in Nonwovens and Technical Textiles Nonwoven applications include: hygiene products (wipes, feminine care—60% of viscose nonwovens), med…
- Viscose Future Developments and Innovation Emerging innovations include: ionic liquid-based dissolution (eliminating CS₂), bacterial cellulose …