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CN-115595675-B - Flash spinning solution mixing device and flash spinning equipment

CN115595675BCN 115595675 BCN115595675 BCN 115595675BCN-115595675-B

Abstract

The application relates to the technical field of non-woven fabric manufacturing, in particular to a flash spinning solution mixing device and spinning equipment. The flash spinning solution mixing device comprises at least 2 swelling channels, a diversion module communicated with the swelling channels and used for diverting external incoming materials to the swelling channels, and a solvent conveying module used for conveying solvents to the inside of the swelling channels, wherein the swelling channels enable the external incoming materials to be swelled in the swelling channels and then output to the flash spinning solution mixing device. The application enables the polymer and the solvent to be fully swelled by the flash spinning solution mixing device, and the concentrated solution and the solvent after swelling are fully dissolved by the static mixing device. Not only ensures the continuity of production, but also saves the production time and improves the production efficiency.

Inventors

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Assignees

  • 厦门当盛新材料有限公司

Dates

Publication Date
20260508
Application Date
20220927

Claims (5)

  1. 1. A flash spinning solution mixing device is characterized by comprising Swelling channels, wherein at least 2 swelling channels are arranged; the diversion module is communicated with the swelling channels and is used for diverting external incoming materials to each swelling channel; A solvent delivery module for delivering solvent into the swelling channel; The swelling channel enables the external feed to be swelled in the swelling channel and then output to the flash spinning solution mixing device; the flow distribution module comprises a flow distribution inlet, a flow distribution cavity and flow distribution channels, wherein the flow distribution cavity is communicated with an external conveying device through the flow distribution inlet and used for receiving external incoming materials; The material in the split flow module flows to the swelling channel through the one-way valve; a spiral unit is arranged in the swelling channel; the swelling channel is also provided with a solvent feed inlet, the solvent feed inlet is arranged between the spiral unit and the one-way valve, and the solvent feed inlet is communicated with the solvent conveying module; The swelling channel is arranged inside the shell, the shell is a pressure-resistant container, one end, away from the flow distribution module, of the shell is provided with a connecting channel, and the swelling channel is communicated with the connecting channel.
  2. 2. The flash spinning solution mixing device according to claim 1, wherein the solvent delivery module is disposed on a side of the housing, and the solvent is delivered from the side into the swelling channel.
  3. 3. A flash spinning apparatus, characterized by: comprises a screw stirring device, a metering device, a static mixing device, a flash spinning solution mixing device and a spinning device; The screw stirring device, the metering device, the flash spinning solution mixing device, the static mixing device and the spinning device are sequentially connected; the flash spinning solution mixing device is the flash spinning solution mixing device according to any one of claims 1-2.
  4. 4. The flash spinning device according to claim 3, wherein the screw stirring device comprises a feed hopper, a discharge port and a machine barrel, wherein the feed hopper and the discharge port are arranged on the machine barrel in a central symmetry manner, and a screw is arranged in the machine barrel.
  5. 5. The flash spinning apparatus of claim 4, wherein a pressure sensor is provided at the outlet.

Description

Flash spinning solution mixing device and flash spinning equipment Technical Field The application relates to the technical field of non-woven fabric manufacturing, in particular to a flash spinning solution mixing device and spinning equipment. Background Flash spinning is a spinning method in which a high polymer solution under high temperature and high pressure is released into an environment at normal temperature and normal pressure through a spinneret orifice, a solvent with a low boiling point is quickly vaporized and instantaneously evaporated, and the high polymer is quickly solidified from a liquid state and is drawn by high-speed solvent gas to form fibers. This requires that the polymer is not dissolved by the solvent at normal temperature and pressure, but is soluble by the solvent at high temperature and pressure, and that the solvent has a low boiling point, is vaporized at low temperature and low pressure, and is kept in a liquid state at high temperature and pressure. The high polymer is dissolved in the solvent in such a way that the polymer is melted to form a melt under the high temperature condition, the melt is fully swelled in the solvent liquid under the high temperature and high pressure, and then the swelled high polymer is dispersed into the solvent by the action of shearing force to form a solution with high viscosity. The swelling speed depends on the particle size of the polymer melt, and the larger the particle size is, the less easy the swelling is. In addition, the uniform solution at high temperature and high pressure is liable to cause a back-polymerization phenomenon, i.e., when the temperature or pressure is changed or the external shear force is insufficient, the dissolved high polymers are agglomerated together again to form an uneven solution. In the existing flash spinning technology, the mixing of the polymer and the solvent is generally carried out through a reaction kettle mixing device, namely, quantitative polymer and the solvent matched with the quantitative polymer are added into a reaction kettle together, inert gas is injected into the reaction kettle after sealing, so that the reaction kettle reaches a certain pressure, the reaction kettle is heated to enable the mixture in the reaction kettle to reach a certain temperature, and the mixture in the reaction kettle is stirred through a stirring device arranged in the reaction kettle, so that the mixture is in a uniformly dissolved state. However, such a solution is difficult to achieve continuous production due to the difference in swelling and dissolution requirements. Disclosure of Invention In order to solve the defects that the polymer and the solvent of the existing flash spinning equipment consume too long time in the dissolution stage and are difficult to continuously produce, the application provides a flash spinning solution mixing device, which comprises: And at least 2 swelling channels are arranged. The diversion module is communicated with the swelling channels and is used for diverting the external incoming materials to each swelling channel. The solvent delivery module is used for delivering the solvent into the swelling channel. The swelling channel enables the external incoming material to be swelled in the swelling channel and then output to the flash spinning solution mixing device. In one embodiment, the flow splitting module includes a flow splitting inlet, a flow splitting chamber, and a flow splitting channel. The shunt cavity is communicated with an external conveying device through a shunt inlet and receives external materials. The shunting channels are arranged around the shunting cavity and correspond to the swelling channels one by one. In one embodiment, the device further comprises a one-way valve, and the material in the diversion module flows to the swelling channel through the one-way valve. In one embodiment, the swelling channel is internally provided with a spiral unit. In an embodiment, the swelling channel is further provided with a solvent feed port, the solvent feed port is arranged between the spiral unit and the one-way valve, and the solvent feed port is communicated with the solvent conveying module. In an embodiment, the swelling channel is arranged in the shell, the shell is a pressure-resistant container, one end of the shell, which is far away from the split-flow module, is provided with a connecting channel, and the swelling channel is communicated with the connecting channel. In one embodiment, the swelling channel is arranged inside a housing, which is a pressure-resistant container. The solvent delivery module is arranged on the side surface of the shell, and the solvent is delivered to the inside of the swelling channel from the side. The application also provides flash spinning equipment which comprises a screw stirring device, a metering device, a static mixing device, a flash spinning solution mixing device and a spinning device. The screw stirring device