POLYAMIDE PRODUCTS RESISTIVE TO ACID DYESTUFFS, AND PROCESS FOR PREPARING THEREOF
A process for preparing melt spun polymeric fiber made from polymerized amide monomers includes the steps of pigmenting the polymer, incorporating within the polymer sufficient SO3H groups or salts thereof to give the polymer a sulphur content of between about 10 and about 160 equivalents per 10 gra...
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