A decrease in molecular weight in molding of a polyamide is suppressed. A polyamide resin composition of the present invention includes: a polyamide having a structural unit containing an alkylene group having 1 to 3 carbon atoms and an amide bond; and a compound having a cyclic structure in which first nitrogen and second nitrogen of a carbodiimide group are bonded by a bonding group. A molded polyamide resin article is produced by molding of the polyamide resin composition through heat pressurization.

A decrease in molecular weight in molding of a polyamide is suppressed. A polyamide resin composition of the present invention includes: a polyamide having a structural unit containing an alkylene group having 1 to 3 carbon atoms and an amide bond; and a compound having a cyclic structure in which first nitrogen and second nitrogen of a carbodiimide group are bonded by a bonding group. A molded polyamide resin article is produced by molding of the polyamide resin composition through heat pressurization.

The present invention relates to a process for producing high tensile strength nanofiber yarn by wet-extrusion on a slippery surface. In particular, the present invention discloses a method wherein individual nanocellulose fibers are aligned by high speed in-nozzle-alignment and on-surface-alignment, which comprise controlling the fiber width on a moving slippery surface.

The present invention relates to a process for producing high tensile strength nanofiber yarn by wet-extrusion on a slippery surface. In particular, the present invention discloses a method wherein individual nanocellulose fibers are aligned by high speed in-nozzle-alignment and on-surface-alignment, which comprise controlling the fiber width on a moving slippery surface.

A spinning beam for producing melt-spun filaments, in which liquid plastics material is conveyed via an externally arranged extruder to at least one pump, which conveys the liquid plastics material to at least one spin pack having a spinneret, at least the pump and the spin pack being heated by a heat transfer medium which is heated in a boiler. The pump, the boiler and an opening for receiving a spin pack are arranged in a modular assembly, which can be installed and fixed singly, or in a plurality one behind the other, in a frame of the spinning beam.

A spinning beam for producing melt-spun filaments, in which liquid plastics material is conveyed via an externally arranged extruder to at least one pump, which conveys the liquid plastics material to at least one spin pack having a spinneret, at least the pump and the spin pack being heated by a heat transfer medium which is heated in a boiler. The pump, the boiler and an opening for receiving a spin pack are arranged in a modular assembly, which can be installed and fixed singly, or in a plurality one behind the other, in a frame of the spinning beam.

A method of manufacturing bulked continuous carpet filament from polytrimethylene terephthalate (PTT) with polyethylene terephthalate (PET) comprises: (1) splitting the PTT stream extruded from the primary extruder into a number of polymer streams, each of the plurality of polymer streams having an associated spinning machine; (2) adding a colorant to each split polymer stream; (3) adding PET to the extruded polymer stream downstream of the primary extruder; (4) using one or more static mixing assemblies for each split polymer stream to substantially uniformly mix each split polymer stream and its respective colorant and PET; and (5) spinning each polymer stream with its substantially uniformly mixed colorant and any additives into BCF using the respective spinning machine.

Methods of manufacturing bulked continuous carpet filament which, in various embodiments, comprise: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) adding one or more color concentrates to the flakes; (E) passing the group of flakes through an MRS extruder (400) while maintaining the pressure within the MRS portion (420) of the MRS extruder (400) below about 25 millibars; (F) passing the resulting polymer melt through at least one filter (450) having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A process for producing an elastic fiber comprising: melt-spinning a raw material composition, which comprises a thermoplastic polyurethane elastomer, at a spinning rate of 2,500 m/min to 10,000 m/min. The thermoplastic polyurethane elastomer comprises soft-segments obtained by reacting a polyether polyol as a long chain polyol.

A process for producing an elastic fiber comprising: melt-spinning a raw material composition, which comprises a thermoplastic polyurethane elastomer, at a spinning rate of 2,500 m/min to 10,000 m/min. The thermoplastic polyurethane elastomer comprises soft-segments obtained by reacting a polyether polyol as a long chain polyol.