CN220485908U - Assembly system for producing regenerated hollow nylon 6 - Google Patents
Assembly system for producing regenerated hollow nylon 6 Download PDFInfo
- Publication number
- CN220485908U CN220485908U CN202321356513.7U CN202321356513U CN220485908U CN 220485908 U CN220485908 U CN 220485908U CN 202321356513 U CN202321356513 U CN 202321356513U CN 220485908 U CN220485908 U CN 220485908U
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- China
- Prior art keywords
- nitrogen
- spinneret
- hollow nylon
- assembly system
- spinneret plate
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- 229920002292 Nylon 6 Polymers 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 135
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 64
- 239000011148 porous material Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 abstract description 27
- 239000000155 melt Substances 0.000 abstract description 12
- 238000009987 spinning Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 7
- 239000012510 hollow fiber Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The utility model relates to the field of spinning, in particular to a component system for producing regenerated hollow nylon 6. The spinning device comprises a spinneret plate, wherein a plurality of evenly distributed spinneret orifices are formed in the spinneret plate, and the cross section of each port of each spinneret orifice is double-C; and a nitrogen outlet duct is arranged in the center of the port of the spinneret orifice. According to the utility model, the nitrogen hole is additionally arranged in the middle of the spinneret hole, so that the cooling of the melt is quickened, the expansion effect of the fiber melt is reduced, the fiber melt is expanded mainly outwards, and the hollowness is improved; secondly, the regenerated yarn just coming out is protected and is not easy to oxidize at high temperature, and the stability of spinning is ensured.
Description
Technical Field
The utility model relates to the field of spinning, in particular to a component system for producing regenerated hollow nylon 6.
Background
Environmental protection regeneration is the topic of important attention in the current society, and the nylon 6 can generate a part of waste silk and waste products in the production process, so that the waste silk and waste products can be remelted and granulated and then can be spun again to prepare the regenerated nylon 6, thereby achieving the purpose of recycling waste.
Because hollow fiber stores a large amount of air along the longitudinal hollow structure of fiber, the woven fabric can achieve a good weight-reducing and warm-keeping effect, and is popular in the market, because the physical regeneration slice is spun into fiber to be processed by double screws for at least three times, and the slice can be degraded to a certain extent after the double screws pass each time, the thermal stability of the physical regeneration slice is poor, and especially if the melt is in a high-temperature state in the spinning process, the melt is directly contacted with air to be oxidized and degraded or yellow easily, so that production broken ends are caused, and the production stability and the product quality are affected.
It is known that the melt expansion effect of the viscoelastic polymer melt after extrusion from the capillary tube is serious, so that the hollow degree of the hollow nylon 6 cannot be improved by one step through melt spinning so far. If the physical regeneration slice is combined with a conventional hollow spinneret (such as a nylon C-shaped spinneret in patent CN203295673U, a spinneret with three C-shaped filament holes in patent CN 202809029U and a double C-shaped spinneret assembly in patent CN 217499522U), the obtained regenerated hollow nylon 6 fiber has low hollowness and poor spinning stability.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a component system for producing regenerated hollow nylon 6, so as to prepare regenerated hollow nylon 6 fiber with good production stability and higher hollowness.
The utility model is realized in the following way:
the component system for producing the regenerated hollow nylon 6 comprises a spinneret plate, wherein a plurality of evenly distributed spinneret orifices are formed in the spinneret plate, and the cross section of each port of each spinneret orifice is double-C; and a nitrogen outlet duct is arranged in the center of the port of the spinneret orifice.
Further, a nitrogen inlet is formed in the side face of the spinneret plate, and the nitrogen inlet extends to the inside and is provided with a nitrogen inlet duct; and the nitrogen outlet duct vertically upwards penetrates out of the C-shaped notch and merges with the nitrogen inlet duct.
Further, the nitrogen outlet channels of all the spinning holes form a serial channel through the nitrogen inlet channel.
Further, the nitrogen inlet is connected with an external nitrogen generating device through a nitrogen input pipeline.
Specifically, a nitrogen pressure control valve and a pressure gauge are arranged on the nitrogen input pipeline.
Further, adjacent spinneret plates are connected through a nitrogen conveying pipeline until the end of the spinneret plate, and the other end of the spinneret plate is closed, so that nitrogen circulates among all the spinneret plates.
Specifically, the nitrogen gas conveying pipeline is a high-temperature-resistant pipeline.
The utility model has the advantages that: according to the utility model, by improving the structure of the existing hollow spinneret plate and additionally arranging a pore canal for introducing nitrogen in the middle of the double-C-shaped spinneret orifice, the regenerated hollow nylon 6 fiber with higher hollowness is prepared. When the melt comes out of the spinneret orifice, nitrogen with certain pressure is introduced into the nitrogen outlet pore passage, and the nitrogen sprayed from the pore passage can play the following roles:
(1) The newly-discharged regenerated yarn is protected from being oxidized at high temperature, and the stability of spinning is ensured;
(2) The cooling of the melt is quickened, and the expansion effect of the fiber melt is reduced so as to improve the hollowness;
(3) Because of the existence of nitrogen in the fiber, the pressure in the fiber is higher than that in the outside, so that the expansion of the fiber melt mainly occurs outwards, and the hollowness is improved.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of a single spinneret.
Fig. 2 is a schematic view of the internal structure of a spinneret (only a portion of the spinneret orifices are shown).
FIG. 3 is a schematic view of the structure of a plurality of spinnerets.
FIG. 4 is a cross-sectional view of a spinneret orifice.
FIG. 5 is a schematic cross-sectional view of a port of a spinneret orifice.
Detailed Description
In the description of the present utility model, it should be understood that the description of indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The technical scheme of the utility model is as follows:
referring to fig. 1, 2 and 3, the assembly system for producing regenerated hollow nylon 6 of the present utility model includes a plurality of spinneret plates, and a plurality of evenly distributed spinneret holes 1 are provided on the spinneret plates. A nitrogen inlet 2 is perforated on the side surface of the spinneret plate and extends to the inside to be provided with a nitrogen inlet duct 3. The nitrogen inlet 2 is connected with an external nitrogen generating device through a nitrogen input pipeline 10. The adjacent spinneret plates are connected through a high-temperature-resistant nitrogen conveying pipeline 11 until the spinneret plate at the tail end, and the other end of the spinneret plate is in a closed state, so that nitrogen circulates among all the spinneret plates.
As shown in fig. 4 and 5, the cross-sectional shape of the port of the spinneret orifice 1 is a double-C-shaped ring. The gap between two adjacent C-shaped faces to the center of the spinneret plate. The center of the double C-shaped circular ring is provided with a nitrogen gas outlet channel 4 (the diameter is 0.03mm and the hole depth is 0.4 mm), the nitrogen gas outlet channel 4 vertically upwards penetrates out of the C-shaped notch and is converged with the nitrogen gas channel 3, the nitrogen gas inlet channel 3 extends from the center of the spinneret plate to the directions of all spinneret holes, and the nitrogen gas outlet channels 4 of each spinneret hole 1 are connected in series.
For processing, the nitrogen inlet channels 3 extend to the side of the spinneret, and when in use, the channels are closed, and only the nitrogen inlet 2 and the symmetrical outlet (except the spinneret at the extreme end) at the other side of the spinneret are left for connecting the adjacent spinneret.
In order to keep the stable state of the nitrogen output pressure, a nitrogen pressure control valve (such as a nitrogen pressure reducing valve) and a pressure gauge are arranged on the nitrogen input pipeline, so that the output pressure can be automatically regulated, and the stability, uniformity and accuracy of the nitrogen in use are ensured.
The specific steps for producing the regenerated hollow nylon 6 (taking FDY full extinction 70D20F as an example) by adopting the component system for producing the regenerated hollow nylon 6 of the utility model are as follows:
(1) Slicing the regenerated slices (relative viscosity: 2.3-2.5; oxidation degree: 3-4% (oxidation degree of normal fresh slice)
Less than 1 percent) is dried by a dryer until the moisture is lower than 300ppm, and the low moisture of the slices can avoid melt fracture phenomenon when the melt comes out of the spinneret orifice, thereby breaking off the ends and affecting the production.
(2) And conveying the dried slices to a screw extruder through a pipeline for melting, mixing and conveying. Wherein the temperature of the 1-5 region of the screw extruder is 145 ℃, 156 ℃, 157 ℃, 156 ℃, 155 ℃ respectively, and the nitrogen protection is connected at the feed inlet of the screw.
(3) The polymer melt is conveyed to a spinning box body through a melt pipeline, quantitatively conveyed through a metering pump and then reaches a component, and the melt is sprayed out of a spinneret orifice of a hollow spinneret plate through high pressure to form hollow fibers.
Wherein the metal non-woven fabric used for the assembly is 15 mu, and impurities in the regenerated slices can be effectively filtered. In addition, in order to obtain higher assembly pressure, the melt can obtain stronger spraying pressure when being sprayed out of the spinneret holes, so that filament breakage can not occur under the condition of subsequent high-speed spray head stretching of the cold roller, and the assembly pressure is controlled to be 170-180 bar.
The spinneret plate is a special hollow spinneret plate, the structure of the spinneret plate is double-C, and a nitrogen gas ejection port is formed in the middle of the spinneret plate. The hole for introducing nitrogen is added in the middle of the spinneret hole, when the melt comes out of the C-shaped spinneret hole, nitrogen with certain pressure is introduced into the nitrogen hole, and the nitrogen sprayed out of the hole can play the following roles:
1. the regenerated yarn just sprayed from the spinning hole is protected from being oxidized easily at high temperature, and the stability of spinning is ensured;
2. the cooling of the melt is quickened, and the expansion effect of the fiber melt is reduced so as to improve the hollowness;
3. because of the existence of nitrogen in the fiber, the pressure in the fiber is higher than that in the outside, so that the expansion of the fiber melt mainly occurs outwards, and the hollowness is improved.
The nitrogen hole on the spinneret plate is communicated with an external nitrogen pipeline, and a nitrogen pressure control valve is arranged on the pipeline to adjust the flow of nitrogen. The nitrogen pressure was 0.008MPa.
(4) Then the hollow fiber sprayed from the spinneret hole firstly pumps the monomer, the oligomer and the like out by a monomer pumping device, so that the crystallization around the spinneret plate is prevented from influencing the production stability, and the monomer pumping pressure is equal to
And then cooling the hollow fiber by side blowing at a temperature of 19.5 ℃ and a wind speed of 0.5m/s to make the fiber solid for stretch forming at 0.15 MPa.
(5) The hollow fiber is oiled by a nozzle, and aims to humidify, prevent static electricity, lubricate, increase the cohesion of tows and the like, and the oil content of the hollow fiber is 2.0%.
(6) Then the hollow fiber sequentially passes through a yarn guide hook and a spinning channel to reach a pre-networking device, and the air pressure at the pre-networking device is 0.08MPa. The function is mainly as follows: 1. blowing the oiling agent on the fiber uniformly; 2. and the cohesion of the fiber is increased for the network point on the fiber.
(7) And then the fibers sequentially pass through a yarn guide rod and a yarn guide hook to reach a cold roller and a hot roller, and the two pairs of rollers mainly play a role in stretching and shaping the fibers so as to increase the strength of the fibers.
Wherein the rotating speed of the cold roller is 2500m/min, and the temperature is 25 ℃ at normal temperature; the rotating speed of the hot roller is 5050m/min,
the temperature was 145 ℃.
(8) And then the fiber is subjected to network feeding through a main network device, so that the cohesion of the fiber is improved, and the pressure of the main network device is 0.45MPa.
(9) And then the fiber passes through a yarn guiding disc and a yarn guiding hook and then reaches a winding head for winding and forming. The speed of the guide wire disc is 5030m/min, and the main functions are guide wire and tension adjustment; the winding head winding roller speed was 5000m/min.
TABLE 1 fiber Performance index
As shown in table 1, the high-speed chill roll and the spinneret holes provided with nitrogen holes all significantly improved the fiber hollowness, but the increase in the chill roll speed increased the number of breaks. In addition, although the hollow degree can be improved by increasing the pressure of the nitrogen, the production is unstable and the number of broken ends is increased.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (6)
1. The component system for producing the regenerated hollow nylon 6 comprises a spinneret plate, wherein a plurality of evenly distributed spinneret orifices are formed in the spinneret plate, and the cross section of each port of each spinneret orifice is double-C; the method is characterized in that: a nitrogen outlet duct is arranged in the center of the port of the spinneret orifice;
the side surface of the spinneret plate is provided with a nitrogen inlet which extends to the inside and is provided with a nitrogen inlet duct; and the nitrogen outlet duct vertically upwards penetrates out of the C-shaped notch and merges with the nitrogen inlet duct.
2. The assembly system for producing regenerated hollow nylon 6 of claim 1, wherein: and the nitrogen outlet pore canal of all the spinneret holes forms a serial channel through the nitrogen inlet pore canal.
3. The assembly system for producing regenerated hollow nylon 6 of claim 1, wherein: the nitrogen inlet is connected with an external nitrogen generating device through a nitrogen input pipeline.
4. An assembly system for producing regenerated hollow nylon 6 as claimed in claim 3, wherein: and a nitrogen pressure control valve and a pressure gauge are arranged on the nitrogen input pipeline.
5. The assembly system for producing regenerated hollow nylon 6 of claim 1, wherein: the adjacent spinneret plates are connected through a nitrogen conveying pipeline until the spinneret plate at the tail end, and the other end of the spinneret plate is closed, so that nitrogen circulates among all the spinneret plates.
6. The assembly system for producing regenerated hollow nylon 6 of claim 5 wherein: the nitrogen conveying pipeline is a high-temperature-resistant pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321356513.7U CN220485908U (en) | 2023-05-31 | 2023-05-31 | Assembly system for producing regenerated hollow nylon 6 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321356513.7U CN220485908U (en) | 2023-05-31 | 2023-05-31 | Assembly system for producing regenerated hollow nylon 6 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220485908U true CN220485908U (en) | 2024-02-13 |
Family
ID=89824339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321356513.7U Active CN220485908U (en) | 2023-05-31 | 2023-05-31 | Assembly system for producing regenerated hollow nylon 6 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220485908U (en) |
-
2023
- 2023-05-31 CN CN202321356513.7U patent/CN220485908U/en active Active
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