Fibers can include a polypropylene composition, which can include a metallocene random copolymer of propylene and a comonomer that is an alpha-olefin different from propylene. The metallocene random copolymer can have a comonomer content of from 1.2 wt % to 1.8 wt %, a molecular weight distribution of at least 1.0 and of at most 4.0 obtained without thermal or chemical degradation, and a melting temperature T.sub.melt of at most 140 C. A nonwoven can include the fibers, and a laminate can include the nonwoven. The fibers can be produced by polymerizing the propylene and comonomer in presence of a metallocene-based polymerization catalyst to obtain the metallocene random copolymer. The polypropylene composition can be melt-extruded to obtain a molten polypropylene stream, which can be extruded from capillaries of a spinneret to obtain filaments. A diameter of the filaments can be rapidly reduced to obtain a final diameter.

Provided is a method for manufacturing a protection board. A reinforcement fabric including multiple reinforcement fibers is provided, each reinforcement fiber containing multiple adjacent filaments, each filament being composed of a core and a shell formed around the core, and a melting temperature of the shell is lower than a melting temperature of the core, the shell of each filament attached to the shell of the adjacent filament. The impact strength of the shell is higher than the impact strength of the core. The reinforcement fabric can be manufactured into a protection board with good impact resistance simply through heating and molding. Therefore, the reinforcement fabric has the advantage of both manufacturing a protection board with good impact resistance and reducing its process complexity and cost.

Various embodiments of the present disclosure can include at least one of a method, apparatus and system for the efficient melting of a feedstock to at least one of a molten and vitrified state to be used in a manufacturing system comprised of: a melter to which the feedstock is provided; and a heat recovery system configured to capture exhaust waste heat produced by the melter, wherein the heat recovery system transfers an energy recovered from the exhaust waste heat to pre-heat the feedstock provided to the melter.

Various embodiments of the present disclosure can include at least one of a method, apparatus and system for the efficient melting of a feedstock to at least one of a molten and vitrified state to be used in a manufacturing system comprised of: a melter to which the feedstock is provided; and a heat recovery system configured to capture exhaust waste heat produced by the melter, wherein the heat recovery system transfers an energy recovered from the exhaust waste heat to pre-heat the feedstock provided to the melter.

The present invention discloses a method for preparing graphene-polyamide nanocomposite fiber. The method includes the following steps of: mixing polyamide chips with graphene or modified graphene, and then extruding and palletizing to obtain graphene-polyamide masterbatch; melt-spinning the graphene-polyamide masterbatch after drying the same, to prepare the graphene-polyamide nanocomposite fiber. Compared with the existing industrial polyamide composite fiber, the method of the present invention has the advantages of simple process and low cost, and can effectively improve the production efficiency and capacity; the modified graphene has such an excellent compatibility with the matrix that it can be uniformly dispersed in the matrix, so that the graphene reinforced phase is perfectly compounded with the polyamide matrix material, thereby greatly improving the performance of graphene-polyamide nanocomposite fiber.

The present invention discloses a method for preparing graphene-polyamide nanocomposite fiber. The method includes the following steps of: mixing polyamide chips with graphene or modified graphene, and then extruding and palletizing to obtain graphene-polyamide masterbatch; melt-spinning the graphene-polyamide masterbatch after drying the same, to prepare the graphene-polyamide nanocomposite fiber. Compared with the existing industrial polyamide composite fiber, the method of the present invention has the advantages of simple process and low cost, and can effectively improve the production efficiency and capacity; the modified graphene has such an excellent compatibility with the matrix that it can be uniformly dispersed in the matrix, so that the graphene reinforced phase is perfectly compounded with the polyamide matrix material, thereby greatly improving the performance of graphene-polyamide nanocomposite fiber.

A method of manufacturing bulked continuous carpet filament from recycled polymer. In various embodiments, the method includes: (1) reducing recycled polymer material into polymer flakes; (2) cleansing the polymer flakes; (3) melting the flakes into a polymer melt; (4) removing water and contaminants from the polymer melt by dividing the polymer melt into a plurality of polymer streams and exposing those streams to pressures below 25 millibars or another predetermined pressure; (5) recombining the streams; and (6) using the resulting purified polymer to produce bulked continuous carpet filament.

The apparatus for producing ultrafine fibers includes a nozzle portion, a laser irradiation unit, and a drawing chamber. The nozzle portion has an inlet for feeding a raw fiber, a first jet outlet which communicates with the inlet and jets a first drawing gas stream for delivering and drawing the raw fiber, and a second jet outlet which is arranged in the periphery of the first jet outlet and jets a second drawing gas stream. The laser irradiation unit on which the nozzle portion is installed irradiates a laser light to the raw fiber delivered from first jet outlet to melt the raw fiber. The drawing chamber draws the melted raw fiber by using the first drawing gas stream and the second drawing gas stream which are jetted from the nozzle portion.

A method of manufacturing bulked continuous carpet filament from recycled polymer. In various embodiments, the method includes: (1) reducing recycled polymer material into polymer flakes; (2) cleansing the polymer flakes; (3) melting the flakes into a polymer melt; (4) removing water and contaminants from the polymer melt by dividing the polymer melt into a plurality of polymer streams and exposing those streams to pressures below 25 millibars or another predetermined pressure; (5) recombining the streams; and (6) using the resulting purified polymer to produce bulked continuous carpet filament.

A method for manufacturing a composite fabric includes the steps of feeding, mixing and stirring, first drying, hot melt extrusion, first cooling, stretch extension, second cooling, winding-strands-into-roll, second drying, and weaving. The composite fabric is composed of multiple first threads and multiple second threads which are woven to the first threads. The first threads and the second threads are respectively reflective threads and glowing threads so that the composite fabric includes both features of light reflection and glowing in dark.