Overview
Rayon, often referred to as 'artificial silk,' is a semi-synthetic fiber derived from wood pulp or cotton linters through the viscose process. Developed in the late 19th century as a cheaper alternative to silk, it revolutionized the textile industry by combining natural cellulose's comfort with synthetic fibers' versatility. Unlike fully synthetic fibers, rayon is biodegradable and retains moisture-absorbing properties similar to cotton. Its production involves dissolving cellulose in chemicals like sodium hydroxide and carbon disulfide, then extruding it into filaments. The fiber's adaptability allows it to mimic silk, wool, or linen, making it a staple in fashion and industrial sectors.
Physical and Chemical Properties
Rayon exhibits high tensile strength when dry but weakens when wet, losing up to 50% of its strength. Its moisture regain (11-13%) surpasses polyester, enhancing comfort in humid climates. The fiber's luster can be adjusted from bright to matte during production, while its drape and dye affinity rival natural silk. Chemically, rayon is sensitive to acids and oxidizers but resists alkalis and organic solvents. It decomposes rather than melts when heated, emitting a characteristic burning-paper odor. Variants like high-tenacity rayon (e.g., for tire cords) undergo additional processing to improve durability.
Main Applications
In apparel, rayon dominates blouses, dresses, and linings due to its silk-like aesthetics and breathability. Its blends with polyester or cotton enhance durability for everyday wear. Industrial uses include medical gauze (for its absorbency) and tire reinforcements (high-tenacity types). Nonwoven rayon serves in disposable hygiene products and wipes. Specialty forms like lyocell (TENCEL™) offer eco-friendly alternatives with closed-loop production. Emerging applications include biodegradable packaging and filtration materials, leveraging rayon's sustainability advantages over petroleum-based synthetics.
Safety and Storage
Rayon poses minimal toxicity risks but requires careful handling of production chemicals like carbon disulfide. Finished fibers may generate combustible dust; storage areas should have proper ventilation and fire suppression systems. B2B buyers should store rayon rolls or bales in climate-controlled warehouses (20-25°C, <65% humidity) to prevent moisture absorption or fungal growth. UV exposure can degrade fibers, so opaque packaging is recommended for long-term storage. Spill containment measures are unnecessary as rayon is non-hazardous in solid form.
B2B Procurement Guide
Procure rayon based on end-use specifications: staple fiber for spinning, filament for weaving, or tow for nonwovens. Key parameters include denier (1.5-15 for apparel), staple length (25-150mm), and luster level. Request certifications like Oeko-Tex® for textiles or ISO 13485 for medical-grade rayon. Negotiate MOQs (typically 5-20 tons) with suppliers in China, India, or Indonesia, where 70% of global production occurs. For sustainable sourcing, prioritize suppliers with FSC-certified wood pulp or closed-loop lyocell processes. Lead times vary from 4-8 weeks, with tighter schedules requiring premium pricing.
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