An apparatus for making nonwoven has a spinning device for spinning continuous filaments and moving the spun filaments in a vertical travel direction along a vertical travel path and a mesh belt below the spinning device, traveling in a horizontal direction, and having a multiplicity of vertically throughgoing openings distributed generally uniformly over its surface and of which a portion are plugged. A cooler and a stretcher are provided along the path downstream of the spinning device and above the belt for cooling and stretching the filaments and depositing the cooled and stretched filaments at a predetermined deposition location on the belt. A blower underneath the belt at the deposition location aspirates air through the openings and thereby holds the deposited filaments down on the belt.

Disclosed are an industrial polyamide yarn, a preparation method therefor, and the use thereof. The raw materials for producing the industrial polyamide yarn include at least 1,5-pentanediamine and a linear aliphatic dibasic acid; or polyamide 5X obtained by the polymerization of 1,5-pentanediamine and a linear aliphatic dibasic acid as monomers. The industrial polyamide yarn according to an embodiment has the characteristics of a low water absorption, a good dimensional stability, a high fracture strength, and a good heat resistance.

Disclosed are an industrial polyamide yarn, a preparation method therefor, and the use thereof. The raw materials for producing the industrial polyamide yarn include at least 1,5-pentanediamine and a linear aliphatic dibasic acid; or polyamide 5X obtained by the polymerization of 1,5-pentanediamine and a linear aliphatic dibasic acid as monomers. The industrial polyamide yarn according to an embodiment has the characteristics of a low water absorption, a good dimensional stability, a high fracture strength, and a good heat resistance.

An ultra-high-molecular-weight fiber manufacturing method is provided. The method includes: removing moisture in a mixed liquid to form a to-be-processed raw material, and supplying the to-be-processed raw material to a spinning device, where the spinning device heats the to-be-processed raw material in different stages, to make the to-be-processed raw material form a semi-molten state and be extruded toward a discharge outlet, to spin at least one fibril; cooling the at least one fibril, to form a first wire; if hardness of the first wire is not in a hardness range, selecting at least two discontinuous heating zones located in the spinning device to perform temperature adjustment; stretching, heating, and re-stretching the first wire, to form a second wire; winding the second wire around a drum; and stretching, drying, and re-stretching the second wire, to form a final wire product.

An ultra-high-molecular-weight fiber manufacturing method is provided. The method includes: removing moisture in a mixed liquid to form a to-be-processed raw material, and supplying the to-be-processed raw material to a spinning device, where the spinning device heats the to-be-processed raw material in different stages, to make the to-be-processed raw material form a semi-molten state and be extruded toward a discharge outlet, to spin at least one fibril; cooling the at least one fibril, to form a first wire; if hardness of the first wire is not in a hardness range, selecting at least two discontinuous heating zones located in the spinning device to perform temperature adjustment; stretching, heating, and re-stretching the first wire, to form a second wire; winding the second wire around a drum; and stretching, drying, and re-stretching the second wire, to form a final wire product.

An apparatus for making spunbond from continuous thermoplastic filaments has a spinneret for spinning the continuous filaments and advancing them in a filament-travel direction, a cooler for cooling the filaments, a stretcher for stretching the filaments, a depositing device including a foraminous belt extending in a machine direction transverse to the filament-travel direction for deposition of the filaments as a nonwoven web and conveyance away from the stretcher, a diffusor between the stretcher and the foraminous belt so that filaments and primary air from the stretcher enter into the diffusor, and a suction device for extracting air through the foraminous belt at an unobstructed extraction region underneath the diffusor outlet and having a width b in a machine direction that is greater than a width B of the diffusor outlet. The diffusor forms upstream and downstream secondary air-inlet gaps at opposite ends through which secondary air is aspirated into the diffusor.

An apparatus for making spunbond from continuous thermoplastic filaments has a spinneret for spinning the continuous filaments and advancing them in a filament-travel direction, a cooler for cooling the filaments, a stretcher for stretching the filaments, a depositing device including a foraminous belt extending in a machine direction transverse to the filament-travel direction for deposition of the filaments as a nonwoven web and conveyance away from the stretcher, a diffusor between the stretcher and the foraminous belt so that filaments and primary air from the stretcher enter into the diffusor, and a suction device for extracting air through the foraminous belt at an unobstructed extraction region underneath the diffusor outlet and having a width b in a machine direction that is greater than a width B of the diffusor outlet. The diffusor forms upstream and downstream secondary air-inlet gaps at opposite ends through which secondary air is aspirated into the diffusor.

An apparatus for making a nonwoven fabric from thermoplastic plastic filaments has an air permeable deposit conveyor having a horizontal face displaceable in a horizontal travel direction and a spinneret above the conveyor for spinning the filaments and depositing the spun filaments on the deposit conveyor in a deposit area of the conveyor as a nonwoven web for conveyance in the travel direction. An extractor beneath the conveyor draws air or process air through the deposit conveyor in the deposit area in a main extraction area below the deposit conveyor and is delimited by, relative to the travel direction, upstream and downstream suction partitions. One of the partitions has an upper edge set at a predetermined vertical spacing below the conveyor equal to between 10 mm and 250 mm.

An apparatus for making a nonwoven fabric from thermoplastic plastic filaments has an air permeable deposit conveyor having a horizontal face displaceable in a horizontal travel direction and a spinneret above the conveyor for spinning the filaments and depositing the spun filaments on the deposit conveyor in a deposit area of the conveyor as a nonwoven web for conveyance in the travel direction. An extractor beneath the conveyor draws air or process air through the deposit conveyor in the deposit area in a main extraction area below the deposit conveyor and is delimited by, relative to the travel direction, upstream and downstream suction partitions. One of the partitions has an upper edge set at a predetermined vertical spacing below the conveyor equal to between 10 mm and 250 mm.

A thermal-moisture comfortable polyester FDY for summer use and a preparation method thereof are provided. The FDY is made of matting agents dispersed polyester via the steps of spinning melt metering, extruding via the compositional spinneret, cooling, oiling, drawing, heat setting and winding. The woven fabrics manufactured with the FDY possess a wicking height and an evaporation rate of larger than or equal to 135 mm and 0.22 g/h, respectively. The compositional spinneret is simultaneously provided with cruciform orifices and circular orifices, and the length ratio of cruciform orifice to circular orifice is equal to the product of their equivalent diameter ratio and a coefficient K, here equivalent diameter is the ratio of orifice cross-section area to its circumference and K ranges from 0.97 to 1.03, and the oiling involves the oiling agent containing 67.30-85.58 wt % of crown ether.