A coextrusion head for manufacturing a bicomponent polymer fiber, comprising a first inlet for receiving a core polymer component, a second inlet for receiving a cladding polymer component, and a dual-channel nozzle comprising an inner channel and an outer channel encompassing the inner channel. The inner and outer channel are in hydraulic connection with the first and second inlet, respectively. The dual-channel nozzle further comprises a joining path establishing a hydraulic connection between the inner channel, the outer channel, and a nozzle outlet of the dual-channel nozzle. The joining path is adapted for bringing the core polymer component and the cladding polymer component into contact with each other such that a contact layer comprising a mixture of the core polymer component and the cladding polymer component is formed between the core polymer component and the cladding polymer component.

Multi-row coaxial melt-blown system including support including first duct to convey polymeric fluid parallel to a delivery direction and second duct to convey air or gas, a box removably constrained to the support and including acceleration ducts parallel delivery direction including tubing in fluid connection with first duct to distribute the fluid, first holes parallel the delivery direction, centred and spaced relative to acceleration ducts along the delivery direction to house each part of a respective tube, second holes parallel the delivery direction for air or gas passage, and a slit extending transversely to the delivery direction between the acceleration ducts and the first holes in fluid connection with the second holes. The support includes a housing to contain the box and the slit extends in the box from side to side in fluid connection with the second duct to convey air or gas from second duct to second holes.

Systems and methods can be used to produce fibers with external corrugations, internal corrugations, or both. These fibers can be used, for example, in hollow fiber membrane modules.

A material deposition device includes a solution supply component, a gas supply component, and a co-axial discharge mechanism. The co-axial discharge mechanism includes a solution discharge mechanism, and a gas discharge mechanism co-axial with the solution discharge mechanism. The material deposition device further includes an alignment component that aligns the solution discharge mechanism in a center of the gas discharge mechanism; and an orifice plate with a number of turbulence inducing structures that induce turbulence in gas exiting the gas discharge mechanism.

Provided is a feed spacer for reducing differential pressure of a reverse osmosis element, the feed spacer forming the reverse osmosis element, the feed spacer comprising a plurality of strands disposed in a mesh shape having predetermined intersection points, and wherein a vertical cross section of each of the strands has a rhombic shape such that a pressure loss of in the feed spacer is minimized by an effective flow of raw water at an interface of a reverse osmosis membrane, and a nozzle for forming the feed spacer.

The present invention provides an elastic fiber dry spinning component and spinning part. The spinning component includes: a temperature control box (3) including a box body (31), wherein the box body (31) is longitudinally provided with multiple polymer solution channels (32) separated from each other; areas in the box body (31) other than the polymer solution channels (32) are cavities, and the cavities are used for circulation of a fluid medium that exchanges heat with an elastic fiber dry spinning polymer solution in the polymer solution channels (32); and a spinneret part (4) detachably connected to the temperature control box (3), wherein the spinneret part (4) includes multiple spinneret orifice sets (41) separated from each other, and the multiple spinneret orifice sets (41) are correspondingly in communication with outlets of the multiple polymer solution channels (32). The spinning part includes a metering device and the above-mentioned spinning component; the metering device is detachably connected to the temperature control box (3) and is used for metering and allocating the elastic fiber dry spinning polymer solution to the multiple polymer solution channels (32). The spinning component and the spinning part are convenient to install and maintain and are highly efficient.

Disclosed herein are customizable kits of parts for the fabrication of polymer fibers. In some embodiments, the kits provided herein comprise a scaffold comprising first and second opposite surfaces and one or more pores extending through the first and second surfaces, wherein each pore comprises a first channel and a first conjunction interface. The kits additionally comprise a plurality of nozzles, wherein each nozzle comprises a second channel and a second conjunction interface, and wherein the second interface can be removably and stably coupled to the first conjunction interface of each pore while allowing a fluid through the first channel and the second channel. The kits further comprise a plurality of closure structures, wherein each closure structure comprises a third conjunction interface, and wherein the third interface can be removably and stably coupled to the first conjunction interface of each pore to seal the pore. In some embodiments, at least the second channel of each nozzle has an internal diameter configured to allow formation of a fiber.

Disclosed herein are customizable kits of parts for the fabrication of polymer fibers. In some embodiments, the kits provided herein comprise a scaffold comprising first and second opposite surfaces and one or more pores extending through the first and second surfaces, wherein each pore comprises a first channel and a first conjunction interface. The kits additionally comprise a plurality of nozzles, wherein each nozzle comprises a second channel and a second conjunction interface, and wherein the second interface can be removably and stably coupled to the first conjunction interface of each pore while allowing a fluid through the first channel and the second channel. The kits further comprise a plurality of closure structures, wherein each closure structure comprises a third conjunction interface, and wherein the third interface can be removably and stably coupled to the first conjunction interface of each pore to seal the pore. In some embodiments, at least the second channel of each nozzle has an internal diameter configured to allow formation of a fiber.

Systems and methods can be used to produce fibers with external corrugations, internal corrugations, or both. These fibers can be used, for example, in hollow fiber membrane modules.

Systems and methods can be used to produce fibers with external corrugations, internal corrugations, or both. These fibers can be used, for example, in hollow fiber membrane modules.