A process for preparing low-melting-point profiled polyester filament

Abstract

This invention relates to the field of low-melting-point profiled polyester filament preparation technology, and discloses a process for preparing low-melting-point profiled polyester filament. The invention includes injecting a chemical fiber solution stored in a chemical fiber solution tank into a spinneret via a metering pump and a flow pipe. Under the pressure of the metering pump, the chemical fiber solution is sprayed through micropores in the spinneret and formed, then enters a coagulation tank. A spinning tube is fixedly installed in the coagulation tank, and the spinning tube has annularly spaced spinning tube holes to allow the coagulation liquid in the coagulation tank to enter the spinning tube. The chemical fiber solution sprayed from the spinneret enters the spinning tube and rapidly solidifies under the action of the coagulation liquid. This invention can quickly change the process effect by adjusting the position of the separating sleeve and the separating plate, thereby changing the curing time of the polyester filament and thus altering the draw elongation of the low-melting-point profiled polyester filament.

Description

Technical Field

[0001] This invention relates to the field of low-melting-point profiled polyester filament preparation technology, and in particular to a low-melting-point profiled polyester filament preparation process. Background Technology

[0002] With the increasingly widespread application of smart textiles, color-changing fiber technology has also developed rapidly. However, color-changing fibers suffer from low wearability, high costs, and cannot be mass-produced, thus limiting their practical applications and significantly restricting their industrialization. Therefore, producing high-performance continuous smart color-changing fibers through low-cost processes is of great scientific research value. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a process for preparing low-melting-point profiled polyester filament in order to overcome the problems mentioned above.

[0004] The technical problem solved by this invention is achieved through the following technical solution:

[0005] A process for preparing low-melting-point profiled polyester filament includes injecting a chemical fiber solution stored in a chemical fiber solution pool into a spinneret via a metering pump and a flow pipe. Under the pressure of the metering pump, the chemical fiber solution is sprayed through the micro-holes of the spinneret and formed, and then enters a coagulation tank. A spinning tube is fixedly installed in the coagulation tank. The spinning tube has annularly spaced spinning tube holes to allow the coagulation liquid in the coagulation tank to enter the spinning tube. The chemical fiber solution sprayed from the spinneret enters the spinning tube and is rapidly solidified under the action of the coagulation liquid. Then, it is twisted and wound into an oil guide roller, and after passing through the oil guide roller, it is wound onto a take-up drum.

[0006] In addition, a coagulation bath circulation tank is provided below the coagulation bath to collect the coagulation liquid flowing out of the spinning tube nozzle at the lower end of the spinning tube. Then, the coagulation liquid is returned to the coagulation bath under the action of the circulation pump through the return pipe connected to the coagulation bath circulation tank. Furthermore, a partition sleeve is fitted outside the spinning tube. A partition plate is fixedly installed on the outside of the partition sleeve. The outer wall of the partition plate is sealed to the inner wall of the coagulation bath. A ground sleeve is fixed at the bottom of the coagulation bath. An elastic sleeve is connected between the ground sleeve and the partition sleeve. The elastic sleeve is waterproof and elastic.

[0007] In one embodiment, a heating module is further provided in the coagulation bath circulation tank for constant temperature heating of the coagulation liquid.

[0008] In one embodiment, the heating module is a water bath heating module with a heating range between 40 degrees Celsius and 65 degrees Celsius.

[0009] In one embodiment, the spinneret has triangular holes that can eject polyester filaments with isosceles triangular cross-sections.

[0010] In one embodiment, a filter is connected in series on the return pipe to filter the returned coagulated liquid and prevent clogging.

[0011] In one embodiment, the filter is located below the circulation pump.

[0012] In one embodiment, the inner diameter of the spinning tube is half the diameter of the spinneret.

[0013] In one embodiment, the mesh diameter of the spinning tube is five to ten times the diameter of the prepared low-melting-point profiled polyester filament, and the mesh of the spinning tube is a regular polygonal structure.

[0014] In one embodiment, the operating flow rate of the circulation pump is the same as the discharge flow rate at the textile nozzle.

[0015] The advantages and positive effects of this invention are: by adjusting the position of the separating sleeve and the separating plate, the process effect can be quickly changed, thereby changing the curing time of the polyester filament and thus changing the draw elongation of the low melting point profiled polyester filament.

[0016] By using the circulation pump in conjunction with the coagulation bath circulation tank to circulate the curing liquid, the sedimentation of the curing liquid can be effectively avoided, and the utilization rate of the curing liquid can be improved.

[0017] The design of the elastic sleeve allows a cavity completely free of curing liquid to be formed below the partition plate, thus saving the use of curing liquid. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0021] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0022] like Figure 1As shown, the present invention discloses a process for preparing low-melting-point profiled polyester filament, comprising: injecting the chemical fiber liquid stored in the chemical fiber liquid pool 10 into the spinneret 13 through the flow pipe 12 via the metering pump 11; under the pressure of the metering pump 11, the chemical fiber liquid is sprayed and formed through the micro-holes of the spinneret 13, and then enters the coagulation tank 18, wherein the coagulation tank 18 is fixedly provided with a spinning tube 15, and the spinning tube 15 is provided with annularly spaced spinning tube holes 16 for allowing the coagulation liquid in the coagulation tank 18 to enter the spinning tube 15; after the chemical fiber liquid sprayed from the spinneret 13 enters the spinning tube 15, it is rapidly solidified under the action of the coagulation liquid, and then twisted and wound into the oil guide roller 22, and after passing through the oil guide roller 22, it is wound onto the take-up drum 21;

[0023] In addition, a coagulation bath circulation tank 20 is provided below the coagulation bath tank 18 to collect the coagulation liquid flowing out of the spinning tube nozzle 23 at the lower end of the spinning tube 15. Then, the coagulation liquid flows back to the coagulation bath tank 18 through the return pipe 17 connected to the coagulation bath circulation tank 20 under the action of the circulation pump 19. Furthermore, a partition sleeve 25 is also fitted outside the spinning tube 15. A partition plate 24 is fixedly provided on the outside of the partition sleeve 25. The outer side wall of the partition plate 24 is sealed to the inner wall of the coagulation bath tank 18. A ground sleeve 26 is fixedly provided at the bottom inside the coagulation bath tank 18. An elastic sleeve 27 is connected between the ground sleeve 26 and the partition sleeve 25. The elastic sleeve 27 is waterproof and elastic.

[0024] In one embodiment, a heating module is further provided in the coagulation bath circulation tank 20 for constant temperature heating of the coagulation liquid.

[0025] In one embodiment, the heating module is a water bath heating module with a heating range between 40 degrees Celsius and 65 degrees Celsius.

[0026] In one embodiment, the spinneret 13 has a triangular structure with holes that can eject polyester filaments with an isosceles triangular cross-section.

[0027] In one embodiment, a filter 29 is connected in series on the return pipe 17 to filter the returned coagulated liquid and prevent clogging.

[0028] In one embodiment, the filter 29 is located below the circulation pump 19.

[0029] In one embodiment, the inner diameter of the spinning tube 15 is half the diameter of the spinneret 13.

[0030] In one embodiment, the mesh diameter of the spinning tube 16 is five to ten times the diameter of the prepared low-melting-point profiled polyester filament, and the mesh of the spinning tube 16 is a regular polygonal structure.

[0031] In one embodiment, the operating flow rate of the circulation pump 19 is the same as the discharge flow rate at the textile nozzle 23.

[0032] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A process for preparing low-melting-point profiled polyester filament, characterized in that: The process involves injecting the chemical fiber liquid stored in the chemical fiber liquid pool (10) into the spinneret (13) through the flow pipe (12) via the metering pump (11). Under the pressure of the metering pump (11), the chemical fiber liquid is sprayed through the micro-holes of the spinneret (13) and then enters the coagulation tank (18). The coagulation tank (18) is fixedly provided with a spinning tube (15). The spinning tube (15) is provided with annularly spaced spinning tube holes (16) to allow the coagulation liquid in the coagulation tank (18) to enter the spinning tube (15). The chemical fiber liquid sprayed from the spinneret (13) enters the spinning tube (15) and is rapidly solidified under the action of the coagulation liquid. Then, it is twisted and wound into the oil guide roller (22), and after passing through the oil guide roller (22), it is wound onto the take-up drum (21). In addition, a coagulation bath circulation tank (20) is provided below the coagulation bath tank (18) to collect the coagulation liquid flowing out from the spinning tube nozzle (23) at the lower end of the spinning tube (15). Then, the coagulation liquid is returned to the coagulation bath tank (18) through the return pipe (17) connected to the coagulation bath circulation tank (20) under the action of the circulation pump (19). In addition, a partition sleeve (25) is also fitted outside the spinning tube (15). A partition plate (24) is fixedly provided on the outside of the partition sleeve (25). The outer side wall of the partition plate (24) is sealed with the inner wall of the coagulation bath tank (18). A ground sleeve (26) is fixedly provided at the bottom of the coagulation bath tank (18). An elastic sleeve (27) is connected between the ground sleeve (26) and the partition sleeve (25). The elastic sleeve (27) is waterproof and elastic.

2. The process for preparing low-melting-point profiled polyester filament according to claim 1, characterized in that: A heating module is also provided in the coagulation bath circulation tank (20) for constant temperature heating of the coagulation liquid.

3. The process for preparing low-melting-point profiled polyester filament according to claim 2, characterized in that: The heating module is a water bath heating module, and its heating range is between 40 degrees Celsius and 65 degrees Celsius.

4. The process for preparing low-melting-point profiled polyester filament according to claim 3, characterized in that: The spinneret (13) has a triangular structure in the holes, which can spray out polyester filaments with an isosceles triangular cross section.

5. The process for preparing low-melting-point profiled polyester filament according to claim 4, characterized in that: A filter (29) is connected in series on the return pipe (17). The filter (29) is used to filter the return coagulated liquid to prevent clogging.

6. The process for preparing low-melting-point profiled polyester filament according to claim 5, characterized in that: The filter (29) is located below the circulation pump (19).

7. The process for preparing low-melting-point profiled polyester filament according to claim 6, characterized in that: The inner diameter of the spinning tube (15) is half the diameter of the spinneret (13).

8. The process for preparing low-melting-point profiled polyester filament according to claim 7, characterized in that: The mesh diameter of the spinning tube hole (16) is five to ten times the diameter of the prepared low-melting-point profiled polyester filament, and the mesh of the spinning tube hole (16) is a regular polygonal structure.

9. The process for preparing low-melting-point profiled polyester filament according to claim 8, characterized in that: The operating flow rate of the circulating pump (19) is the same as the discharge flow rate at the textile nozzle (23).

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