Man Made Fibers And Their Properties InfoHouse（人造纤维InfoHouse及其属性）.pdfVIP

GenericName Acetate Cellulose Acetate; Triacetate where not less than 92%of the cellulose is acetylated Acrylic At least 85% Acrylonitrile unite Aramid Polyamide in which at least 85% of the amide linkages are directly attached to two aromatic rings Glass Glass Modacrylic Lessthan 85%but at least 35% acrylonitrileunits Nylon Polyamide in which less than 85% of the amide linkages are directly attached to two aromatic rings Olefin At least 85% ethylene,propylene, or other olefin units Polyester At least 85%ester of a substituted aromatic carboxylic acid includingbut not restricted to substituted terephthalate units and parasubstituted hydroxybenzoate units Rayon Regenerated cellulose withless than 15% chemically combined substituents Saran At least 80%vinylidene chloride Spandex Elastomer of at least 85% of a segmented polyurethane Vinal At least 50% vinyl alcohol units and at least 85% total vinyl alcohol and acetal units _- 3-2 Man Made FibersAnd Their Proprtles Wet Spinning TvDical WetSDun Fibers Viscose Acrilan Creslan Disadvantages Slow (70 - 150 yddmin) 0 Washing to remove impurities Solvent and chemical recovery Advantages Large tows can be handled Man Made FibersAnd Thek Propertla 3-3 Dry Spinning TvDicalDry SRun Fibers Acetate (acetone solvent) Triacetate (methylene chloride) Spandex (some) (dimethyl formamide) Disadvantages Flammable solvent hazards 0 Solvent recovery Slow (?) (200 - 400 yddmin) Advantages Y