The three products are viscose rayon staple fibers, certain cuprammonium
rayon filament yarns and cashmere yarn.
Once dominated by cotton and synthetic materials like polypropylene and nylon, fibers of nonwoven fabrics recently have been expanding and diversifying to other natural-positioned materials, ranging from lyocell (mainly Tencel from Lenzing) and cuprammonium
(marketed as 'silk' as it mimics the appearance and skin feel of real silk), to bamboo/wood/fruit-derived ones and real silk (infusing silk-derived nanosized protein fiber into nonwoven fabric, to be accurate).
(48.) Bemberg was a rayon fabric made by the cuprammonium
Their degrees of polymerization (DP) values were measured by the cuprammonium
hydroxide solution method and given in Table 1.
The first was a cuprammonium
rayon-based membrane, which was used for at least 1 month; after this period the same subjects were treated with a multilayer vitamin E-coated membrane (12), which was used for 3 months.
Kenji Kamide, Director of Basic Research on Fibre-forming Polymers, Asahi Chemical Industries, Osaka, Japan, discussed the theory of formation of cuprammonium
cellulose membranes, and briefly mentioned possible new biomedical applications of these membranes to filter hepatitis and AIDS virus from blood plasma.
The most satisfactory solvents for cellulose are alkaline and a common solvent is cuprammonium
Another capacity expansion in the works for Asahi is at its 3600 tonne cuprammonium
rayon spunbonded operation, which is currently operating at full capacity.