摘要:
An ultrafine composite fiber of the present invention is obtained by heating and melting a composite-resin-formed product in front of a supply-side electrode and/or in a space between electrodes and extending the composite-resin-formed product by electrospinning, wherein the composite-resin-formed product is a solid-state composite-resin-formed product having two or more phases and including a resin that has a volume specific resistance of 10 15 Ω·cm or less, and that is exposed on 30 % or more of a surface of the composite-resin-formed product. With this, an ultrafine composite synthetic fiber and an ultrafine synthetic fiber can be obtained by electrospinning, without a solvent being mixed in a supply resin, and further, a method for manufacturing an ultrafine composite fiber, as well as a fiber structure containing an ultrafine composite fiber, are provided
摘要:
The invention relates to a method for melting a polymer granulate on a melt element to enable the melted granulates to be spun. In order to allow the granulate to melt in an energetically viable manner, without high thermal or mechanical strain, a melt element which is conically tapered towards the openings on the underside of said melt element is used. The spherical particles thereof are introduced into said openings in the form of a granulate with an average diameter of D3, having a ratio to the entrance-side diameter D1 of the opening of 2 * D3 ≥ D1 ≥ D3.
摘要:
An apparatus and a method for increasing the flow rate of a pressurized liquid through an orifice by applying ultrasonic energy to a portion of the pressurized liquid. The apparatus (100) includes a die housing (102) which defines a chamber (104) adapted to receive a pressurized liquid and a means for applying ultrasonic energy (116) to a portion of the pressurized liquid. The die housing (102) further includes an inlet (110) adapted to supply the chamber with the pressurized liquid, and an exit orifice (112) defined by the walls of a die tip (136). The exit orifice (112) is adapted to receive the pressurized liquid from the chamber (104) and pass the liquid out of the die housing (102). When the means for applying ultrasonic energy (116) is excited, it applies ultrasonic energy to the pressurized liquid without applying ultrasonic energy to the die tip (136). The method involves supplying a pressurized liquid to the foregoing apparatus (100), applying ultrasonic energy to the pressurized liquid but not the die tip (136) while the exit orifice (112) receives pressurized liquid from the chamber (104), and passing the pressurized liquid out of the exit orifice (112) in the die tip (136).
摘要:
In a process for the production of a shaped article involving the remelting of a polyamide which has been subjected to a drying stage, such as that which occurs during solid phase polymerisation, the stage of conditioning the polyamide prior to remelting can be reduced or avoided by adding a controlled amount of water to the molten polymer or immediately prior to its remelting.
摘要:
Disclosed is a spinning-drawing-winding device for industrial polylactic-acid fiber, including a double-surface oiling mechanism (11), a filament shearing-suctioning device (12), a pre-interlacer (13) and a splitting filament roller (14) disposed in sequence according to a production process; a drawing-winding device (200) cooperates with a spinning device(100), a tow passing from the spinning device (100) through the double-surface oiling mechanism (11), the filament shearing-suctioning device(12), and the pre-interlacer (13) in sequence until the tow is conveyed to the splitting filament roller (14); the drawing-winding device (200) and the spinning device (100) are configured as a parallel configuration, so that the tow between the spinning device (100) and the splitting filament roller (14) are arranged in a vertical direction and is tangential to the splitting filament roller (14), and therefore the tow is without deflection, thereby avoiding damaging the tow due to a friction caused by a higher deflection.
摘要:
Disclosed are a screw extruder and a combined spinning-drawing-winding machine for industrial polylactic-acid fiber. The screw extruder includes a threaded sleeve (1-a) and a threaded rod (1-b) penetrating in the threaded sleeve (1-a). The threaded rod (1-b) includes a feed section (1-5d), a compression section and a metering section (1-5a). The threaded sleeve (1-a) includes a gas collection chamber (1-3g) and an exhaust hole (1-3d). The gas collection chamber (1-3g) is opened and disposed on an inner wall of a junction of the compression section and the metering section (1-5), A gas is collected through the gas collection chamber (1-3g). The gas generated by a hydrolysis is discharged from the exhaust hole (1-3d) by controlling an on-off valve (1-3). When the melt enters the metering section (1-5a), the gas is removed in time, thereby overcoming the serious adverse impact of the gas from the hydrolysis on the spinning. The unfavorable situation of end breakage is eliminated, and a subsequent spinning quality and a spinning efficiency are guaranteed.
摘要:
Processes for producing carbon fibre, the filament thereof and pre-oxidized fibre are provided. In one embodiment, the gel spinning of polyacrylonitrile filament is achieved by using small-molecule gelling agent, and the carbon fibre obtained thereby is increased by 15% to 40% in tensile strength and by 20% to 35% in toughness. In another embodiment, the melt spinning process of polyacrylonitrile is conducted by using imidazole type ion liquid as plasticizer, the process reduces environment pollution, is suitable for industrial production and the fibre produced thereby is improved in its strength. In yet another embodiment, polyacrylonitrile pre-oxidized fibre is produced by melt spinning, so low cost and controllable pre-oxidization of polyacrylonitrile can be achieved. In a further embodiment, high strength carbon fibre is manufactured by using polymer thickening agent. In another further embodiment, low cost and controllable pre-oxidization of polyacrylonitrile is achieved by conducting pre-oxidization before spinning, minimizing skin-core structure, so as to produce high performance carbon fibre, and reduce the production cost of carbon fibre greatly.
摘要:
An apparatus and a method for increasing the flow rate of a pressurized liquid through an orifice by applying ultrasonic energy to a portion of the pressurized liquid. The apparatus (100) includes a die housing (102) which defines a chamber (104) adapted to receive a pressurized liquid and a means for applying ultrasonic energy (116) to a portion of the pressurized liquid. The die housing (102) further includes an inlet (110) adapted to supply the chamber with the pressurized liquid, and an exit orifice (112) defined by the walls of a die tip (136). The exit orifice (112) is adapted to receive the pressurized liquid from the chamber (104) and pass the liquid out of the die housing (102). When the means for applying ultrasonic energy (116) is excited, it applies ultrasonic energy to the pressurized liquid without applying ultrasonic energy to the die tip (136). The method involves supplying a pressurized liquid to the foregoing apparatus (100), applying ultrasonic energy to the pressurized liquid but not the die tip (136) while the exit orifice (112) receives pressurized liquid from the chamber (104), and passing the pressurized liquid out of the exit orifice (112) in the die tip (136).