Various implementations include a method of forming a bulked continuous filament (BCF) yarn. The method includes providing N molten streams of polymer, providing M spinnerets, and spinning the N molten streams of polymer through the M spinnerets. At least a first group of filaments and a second group of filaments are spun through the M spinnerets. The first group of filaments each have a first average denier per filament along a length of the filaments and the second group of filaments each having a second average denier per filament along a length of the filaments, the first and second average denier per filament being different. The method further includes combining the filaments from the M spinnerets together and texturizing the spun filaments.

A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye. The second dye has a different color than the first dye, the second polymer being of the same or of a different type as the first polymer. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

A macro-synthetic fiber includes three or more partially fused filaments made of a polymer composition including at least one polypropylene, wherein the fiber has a multi-lobal cross-sectional shape with three or more lobes. A method produces macro-synthetic fibers, a cementitious material includes a binder and macro-synthetic fibers, and a method for forming a concrete surface uses a concrete mixture modified with the macro-synthetic fibers.

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 method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye of a different color than the first dye. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

The invention relates to a process for the production of spunbonded nonwoven and a device for the production of spunbonded nonwoven, wherein, in the process, a spinning mass is extruded through a plurality of nozzle holes to form filaments, the filaments are drawn in the extrusion direction, precipitated at least partially by being subjected to a coagulation air stream comprising a coagulation liquid and deposited to form the spunbonded nonwoven. To establish a process which permits a cost-efficient and simple adjustment of the air permeability of the spunbonded nonwoven, it is suggested that the air permeability of the spunbonded nonwoven is adjusted on the basis of at least one parameter of the coagulation air stream in that the actual air permeability of the spunbonded nonwoven is measured, the difference between the actual air permeability and a predefined target air permeability is determined and the at least one parameter of the coagulation air stream is changed as a function of the determined difference.

The present invention relates to stretched polyolefin fibers comprising a polymer comprising at least one polymeric modifier selected from olefinic polymers modified with an acid and/or an acid anhydride, the use of these fibers in the reinforcement of cementitious compositions, and cementitious composition containing these fibers.

The present invention concerns a multifilament fibre comprising at least one polymer comprising a polyester, and at least one filler comprising calcium carbonate. The present invention further relates to a process of producing such a multifilament fibre as well as the use of calcium carbonate as filler in a multifilament fibre comprising at least one polymer comprising a polyester.

A wire drawing process of a light storage wire includes a feeding step, a mixing step, a first drying step, a hot melt extrusion step, a first cooling step, a shaping/organizing wire step, a hot-temperature remodeling step, a stretching step, a second cooling step, a strand winding/rolling step, and a second drying step.

The present disclosure pertains to: polyamide fibers for an airbag which are characterized in that the fiber size thereof is 200-800 dtex, inclusive, and the stress retention rate thereof when obtained using a prescribed procedure is at least 3.0%; and a method for producing said polyamide fibers for an airbag, the method being characterized in that during the thermosetting step and the relaxing step thereof, the contact time between thread and a roller which is at least 190° C. is at least 30 msec and less than 110 msec, the temperature of the thermosetting roller is 190-205° C., inclusive, the temperature of the relaxing roller is greater than 100° C. and less than 190° C., and the speed ratio of the relaxing roller to the thermosetting roller satisfies this equation: 1.00<relaxing roller speed/thermosetting roller speed<1.10.