Process for the production of uniformly dyeable nylon 66 fiber
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsHiroshi Tanji, Michitaka Iwata, Hideo Sato
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Abstract
A nylon 66 fiber capable of being uniformly dyed is made by extruding a melt of nylon 66, passing the extruded filaments through a heating zone provided at the surface of the extrusion nozzle and having a length of at least about 5 cm to about 100 cm and a temperature of about 150.degree. C. to about 260.degree. C., applying a suction with an aspirator located below the heating zone, and then winding at a winding speed of at least 6,000 m/min.
Claims2
A process for producing a nylon 66 fiber with improved dyeability consisting essentially of extruding a melt of nylon 66 from a nozzle, passing the extruded filaments through a heating zone provided at the surface of the nozzle and having a length of about 5 cm to about 100 cm and a temperature of about 150.degree. C. to about 260.degree. C., applying a suction to the filaments with an aspirator located at a distance of about 5 cm to about 60 cm below the heating zone, and then winding at a winding speed of at least about 6,000 m/min.
Dependencies are inferred from the claim text.