Overview
Rayon 75D/2 is a premium-grade viscose rayon filament yarn composed of two plied 75-denier strands. As a regenerated cellulose fiber, it bridges natural and synthetic materials with superior luster and hand-feel comparable to silk. The '75D/2' designation indicates its linear density (75 grams per 9,000 meters) and 2-ply structure, making it ideal for applications requiring both fineness and strength. Developed as a cost-effective silk alternative, it now serves specialized textile sectors demanding aesthetic and functional performance.
Physical and Chemical Properties
This semi-synthetic fiber exhibits unique hygroscopicity, absorbing up to 14% moisture while remaining dry to the touch. Its tenacity ranges between 1.5-2.4 g/denier when dry, reducing by ~50% when wet - a critical factor for wet processing. The fiber's amorphous structure enables exceptional dye uptake with brilliant color yields, though it's susceptible to mildew in humid conditions. Unlike synthetic fibers, it burns rapidly with a paper-like odor, leaving minimal ash. Its thermal properties require low-temperature ironing (<150°C) to prevent glazing.
Main Applications
In high-end fashion, 75D/2 rayon dominates luxury linings and lingerie due to its breathability and anti-static properties. The medical field utilizes its bacteriostatic qualities for disposable surgical covers and wound contact layers. Industrial applications include premium embroidery threads where its low friction coefficient prevents needle heating. Specialty uses encompass religious vestments and theatrical costumes requiring drape fidelity. Recent innovations incorporate it into sustainable composites with biodegradability advantages over petrochemical fibers.
Safety and Storage
While rayon itself poses minimal health risks, residual processing chemicals (particularly carbon disulfide) may require workplace exposure monitoring. Finished fibers should comply with Oeko-Tex Standard 100 for restricted substances. Storage requires humidity-controlled environments (50-65% RH) to prevent moisture absorption leading to browning. Pallets should be elevated 10cm above floors with polyethylene wrapping to minimize dust contamination. For fire safety, Class B extinguishers are recommended due to the fiber's rapid flame spread characteristics.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001-certified spinning facilities capable of maintaining ±1% denier tolerance. Key specifications to verify include twist level (commonly 600-800 TPM), elongation at break (18-24%), and coefficient of variation (<8%). Bulk purchases (typically >5 metric tons) often qualify for 8-12% discounts. Consider CIF terms for international shipments to mitigate moisture damage risks during transit. Emerging sustainable options include ECOVERO™ branded fibers with traceable wood pulp origins and reduced environmental impact.
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