Process for preparing aromatic polyamide fibre and film

• Main Authors: PARK, SANG BONG, PARK, JONG TAE, KIM, SI MIN, KIM, SANG HO, YOO, SEOG CHUL, KIM, DU HEYN, KIM, HAK MOOK, HAN, IHN SIK, PARK, HO JIN, RHIM, MOO SAN
• Format: Patent
• Language: English; French; German
• Published: 24.05.1989
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Aromatic polyamide fibre and film is made by forming a prepolymer by condensation while dissolved in an amide solvent containing inorganic salt solubiliser, extruding the resultant prepolymer dope into a precipitating solvent containing a polymerisation accelerator and stretching the extruded product while completing the polymerisation. The resultant fibre or film does not include crystal defect layers and has good strength and resistance to friction.