NYLON FIBER CONTAINING PIGMENT AND HAVING RESISTANCE TO CONTAMINATION AND METHOD OF ITS PRODUCTION

摘要

PURPOSE: To obtain the subject fibers stain-resistant to acid dyes and applicable also to films and formed articles by copolymerizing a specified amount of an aromatic sulfonate (or its alkali metal salt) and spinning it into fibers after adding pigments. CONSTITUTION: (A) 0.25-4.0% Aromatic sulfonate (or its alkali metal salt) (for example: sodium 5-sulfoisophthalate) and (B) polyamide-forming source materials (for example: source materials of nylon 6 or nylon 66) are copolymerized to obtain a copolymer, which then is spun after adding an organic or inorganic pigment (for example: titanium dioxide being a white pigment) to obtain the objective fibers having <=88 CIELAB(R)L* and >=8C* when L* is >88.