CN114262943A - Production process of regenerated full-dull nylon 6 filament - Google Patents
Production process of regenerated full-dull nylon 6 filament Download PDFInfo
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- CN114262943A CN114262943A CN202111637259.3A CN202111637259A CN114262943A CN 114262943 A CN114262943 A CN 114262943A CN 202111637259 A CN202111637259 A CN 202111637259A CN 114262943 A CN114262943 A CN 114262943A
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- tows
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- production process
- filament
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- 229920002292 Nylon 6 Polymers 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 172
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 78
- 239000000155 melt Substances 0.000 claims abstract description 20
- 238000009987 spinning Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 238000004043 dyeing Methods 0.000 abstract description 5
- 229920006052 Chinlon® Polymers 0.000 abstract description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 16
- 238000001816 cooling Methods 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a production process of regenerated full-dull nylon-6 filament, which comprises the following steps: adding the regenerated slice raw materials into a screw extruder, extruding and melting the raw materials into a melt, and conveying the melt to each spinning manifold through a melt pipeline; the melt is metered and uniformly distributed into the spinning assembly by the metering pump, tows are extruded by the spinneret plate, and the first nitrogen protection device below the spinneret plate filament outlet protects the tows, so that the contact between the tows and air is reduced; then the tows are sequentially cooled by a side blowing system and oiled by an oil nozzle; the oiled tows pass through the channel and are pre-wound by a pre-interlacer; the pre-wound tows enter a cold box and a hot box for stretching and shaping, a heating assembly in the cold box preheats the tows, and a second nitrogen protection device in the hot box protects the tows, so that the tows are reduced from contacting air; and (4) increasing the network degree of the stretched and shaped filament bundle through a main network device, and then carrying out package forming on the filament bundle by a winding machine. The invention has reasonable design and effectively improves the strength, the elongation and the dyeing rate of the chinlon 6.
Description
The technical field is as follows:
the invention relates to a production process of regenerated full-dull nylon-6 filament.
Background art:
in the existing production process of regenerated nylon-6, in the shaping and stretching process of regenerated nylon-6, the regenerated nylon-6 yarn is easier to be oxidized, so that the regenerated nylon-6 yarn has low strength, low elongation, poor subsequent dyeing effect and obvious strip feeling on the woven cloth surface.
The invention content is as follows:
the invention aims at solving the problems in the prior art, namely the technical problem to be solved is to provide a production process of the regenerated full-dull nylon-6 filament, which is reasonable in design and can effectively improve the strength, the elongation and the dyeing rate of the nylon-6.
In order to achieve the purpose, the invention adopts the technical scheme that: a production process of regenerated full-dull nylon 6 filaments comprises the following steps:
step S1: adding the regenerated slice raw material into a screw extruder, extruding and melting the regenerated slice raw material into a melt after passing through the screw extruder, and conveying the melt to each spinning box body through a melt pipeline;
step S2: the melt is metered and uniformly distributed into each spinning assembly by a metering pump, tows are extruded through a spinneret plate of each spinning assembly, and a first nitrogen protection device below a filament outlet of the spinneret plate protects the tows, prevents the tows from contacting air at a high temperature and prevents the tows from being oxidized;
step S3: then the tows are sequentially cooled by a side blowing system and oiled by an oil nozzle;
step S4: the oiled tows pass through the channel and then pass through the pre-interlacer, so that the surfaces of the tows are oiled uniformly;
step S5: the pre-wound tows sequentially enter a cold box and a hot box for stretching and shaping, a heating assembly in the cold box preheats the tows, a second nitrogen protection device in the hot box protects the tows, the tows are prevented from contacting air at a high temperature, and the tows are prevented from being oxidized;
step S6: and the filament bundle after stretching and shaping is subjected to net degree increase by a main net device and then is subjected to package forming by a winding machine after passing through a yarn guide disc.
Furthermore, first nitrogen protection device includes the first nitrogen gas output tube of annular form, first nitrogen gas output tube is connected with nitrogen gas supply source through the pipeline, and first nitrogen gas output tube ring is located the below of spinneret outlet, and the inner wall distribution of first nitrogen gas output tube has a plurality of first nitrogen gas delivery outlets.
Further, the nitrogen output pressure of the first nitrogen output port is 0.3M3/H。
Further, the heating assembly comprises a pair of far infrared heaters which are vertically and fixedly installed on the left inner side wall and the right inner side wall of the cold box respectively.
Further, the temperature regulation range of the far infrared heater is 50-200 ℃.
Furthermore, one end of the bottom of the hot box is provided with a hot box wire inlet which is beneficial for the wire bundle to pass through; the second nitrogen protection device comprises a second nitrogen output pipe in an annular shape, the second nitrogen output pipe is connected with a nitrogen supply source through a pipeline, the second nitrogen output pipe is annularly arranged at the inner bottom of the hot box and sleeved outside the hot box wire inlet, and a plurality of second nitrogen output ports are distributed on the inner wall of the second nitrogen output pipe.
Further, the nitrogen output pressure of the second nitrogen output port is 0.5M3/H。
Further, in step S1, the vacuum-packed regenerated slice material packet is hoisted by an electric hoist and added into the corresponding bin, the regenerated slices in the bin are conveyed to a storage tank, and the storage tank adds the regenerated slice material into the screw extruder through the control of a material valve.
Further, the spinning speed of the spinning assembly is 4300 and 4800 m/min; the speed of the cold roller in the cold box is 3600-; the speed of the hot roller in the hot box is 4400-4900m/min, the setting temperature of the hot roller in the hot box is 150-175 ℃, and the stretching ratio of the cold roller in the cold box to the hot roller in the hot box is 1.16-1.26; the speed of the godet is 4300 and 4800 m/min.
Further, the wind temperature of the side blowing system is 20-24 ℃, and the wind speed is 0.40-0.58 m/s; the rotating speed of the metering pump is 8-15 revolutions per minute.
Compared with the prior art, the invention has the following effects: the invention has reasonable design, the nitrogen protection device is arranged at the filament outlet of the spinneret plate and is filled with nitrogen for protection, the regenerated filament is prevented from being oxidized by air, the heating assembly is arranged in the cold box for presetting, the nitrogen protection device is additionally arranged in the hot box and is filled with nitrogen for protection, the filament bundle is prevented from contacting with air at a high temperature, the regenerated nylon 6 is prevented from being oxidized, and the strength, the elongation and the dyeing rate of the regenerated nylon 6 are effectively improved.
Description of the drawings:
FIG. 1 is a schematic construction of an embodiment of the present invention;
FIG. 2 is a schematic process flow diagram of an embodiment of the present invention;
FIG. 3 is a schematic front view showing the configuration of a first nitrogen gas guard in the embodiment of the present invention;
FIG. 4 is a schematic top view showing the configuration of the first nitrogen gas guard in the embodiment of the present invention;
fig. 5 is a schematic configuration diagram of a heating unit and a second nitrogen gas protecting means in the embodiment of the present invention.
In the figure:
1-a storage bin; 2-a material storage tank; 3-screw extruder; 4-spinning manifold; 5-a metering pump; 6-spinneret plate; 7-a first nitrogen protection device; 701-a first nitrogen output pipe; 702-a first nitrogen gas output; 8-a heating assembly; 801-far infrared heater; 9-a second nitrogen protection device; 901-a second nitrogen output pipe; 902-a second nitrogen output; 10-side blowing system; 11-a nozzle tip; 12-a chimney; 13-pre-networking device; 14-a thread guide; 15-a cold box; 151-cold roll; 16-a hot box; 161-hot rolls; 162-hot box wire inlet; 17-a master network; 18-godet; 19-a winder; 20-filament bundle.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in figures 1-2, the production process of the regenerated full-dull nylon-6 filament comprises the following steps:
step S1: hoisting a vacuum-packaged regenerated slice material bag by using an electric hoist to be added into a corresponding stock bin 1, conveying the regenerated slices in the stock bin 1 to a storage tank 2, adding a regenerated slice raw material into a screw extruder 3 by the storage tank 2 through the control of a material valve, extruding and melting the regenerated slice raw material into a melt shape after passing through the screw extruder 3, filtering the melt shape by a melt filter screen, and conveying the melt shape to each spinning box 4 through a melt pipeline;
step S2: the melt is metered and uniformly distributed into each spinning assembly by the metering pump 5, the filament bundles 20 are extruded through the spinneret plate 6 of the spinning assembly, the first nitrogen protection device 7 is arranged below the filament outlet of the spinneret plate 6, and the melt of the nylon 6 is high in temperature and easy to oxidize when contacting with air at the moment, so that the filament bundles are protected by the first nitrogen protection device 7 by filling nitrogen, contact of the filament bundles with air at a high temperature is prevented, and the filament bundles are prevented from being oxidized;
step S3: then the tows are sequentially cooled by a side blowing system 10 and oiled by an oil nozzle 11;
step S4: the oiled tows 20 pass through the channel 12 and then pass through the pre-interlacer 13, so that the surfaces of the tows are oiled uniformly;
step S5: the pre-wound filament bundle passes through the filament guide 14, then sequentially enters the cold box 15 and the hot box 16 for stretching and shaping, and molecular thermal motion is increased through the heating assembly 8 in the cold box 15 so as to preheat the filament bundle, so that the subsequent hot box can be rapidly heated conveniently, and the heating speed is increased; because the temperature in the hot box is high, the chinlon 6 is easily oxidized by air, the second nitrogen protection device 9 is arranged in the hot box 16, and the second nitrogen protection device 9 is used for protecting the tows by filling nitrogen to prevent the tows from contacting the air at a high temperature state, so that the tows are prevented from being oxidized;
step S6: the stretched and shaped filament bundle passes through a main netting device 17 to increase the degree of netting, and then passes through a godet 18 to a winding machine 19 for package forming.
In this embodiment, as shown in fig. 3 and 4, the first nitrogen protection device 7 comprises a ring shapeThe first nitrogen gas output pipe 701 is connected with a nitrogen gas supply source (not shown in the figure) through a pipeline, the first nitrogen gas output pipe 701 is annularly arranged below a filament outlet of the spinneret plate 6, and a plurality of first nitrogen gas output ports 702 are distributed on the inner wall of the first nitrogen gas output pipe 701. The first nitrogen output pipe outputs a large amount of nitrogen through the first nitrogen output port, and the nitrogen is low in density and can be gathered at the filament outlet of the spinneret plate to form nitrogen protection, so that the contact between the filament bundle and air is reduced. Preferably, the nitrogen output pressure of the first nitrogen output port is 0.3M3/H。
In this embodiment, as shown in fig. 5, the heating assembly 8 includes a pair of far infrared heaters 801, the pair of far infrared heaters 801 are vertically and fixedly installed on the left and right inner sidewalls of the cold box 15, respectively, and the far infrared heaters can increase molecular heat movement. It should be noted that the far infrared heater is a mature technology in the prior art, and the structure thereof is not repeated here.
In this embodiment, in order to adjust the heating temperature of the filament bundle in the cold box, the temperature of the far infrared heater is adjustable, and the adjustment range is 50 to 200 ℃.
In this embodiment, as shown in fig. 5, one end of the bottom of the hot box 16 is provided with a hot box filament inlet 162 for facilitating the filament bundle to pass through; the second nitrogen protection device 9 includes a second nitrogen output pipe 901 in a ring shape, the second nitrogen output pipe 901 is connected with a nitrogen supply source (not shown in the figure) through a pipeline, the second nitrogen output pipe 901 is annularly arranged at the inner bottom of the hot box and sleeved outside the hot box wire inlet 162, and a plurality of second nitrogen output ports 902 are distributed on the inner wall of the second nitrogen output pipe 901. The second nitrogen output pipe outputs a large amount of nitrogen through the second nitrogen output port, and the nitrogen is low in density and can be filled in the whole hot box to form nitrogen protection, so that the contact between the tows and air is reduced. Preferably, the nitrogen output pressure of the second nitrogen output port is 0.5M3/H。
In this embodiment, the first nitrogen output port 702 and the second nitrogen output port 902 are both connected to air nozzles.
In this embodiment, in step S1, the storage tank generally stores the regenerated slices for two days. Through designing the storage tank, can save the problem of stopping machine in the production process repeatedly and feeding, improve production efficiency.
In this embodiment, the temperature of each zone of the screw extruder is 250-. The screw pressure in the screw extruder is 110KG/h, the melt temperature is 265 ℃, the box temperature is 265 ℃, the biphenyl temperature is 266 ℃, the component pressure is 166KG/CM2。
In this embodiment, the spinning speed of the spinning assembly is 4300 and 4800 m/min.
In this embodiment, the speed of the cooling roller 151 in the cooling box 15 is 3600-; the speed of the hot roller 161 in the hot box 16 is 4400-4900m/min, the setting temperature of the hot roller in the hot box is 150-175 ℃, and the stretching ratio of the cold roller in the cold box to the hot roller in the hot box is 1.16-1.26.
In this embodiment, the speed of the godet 18 is 4300 and 4800 m/min.
In the embodiment, the air temperature of the side blowing system 10 is 24 ℃, and the air speed is 0.55 m/s; the rotating speed of the metering pump is 8 revolutions per minute, and the rotating speed of the oil agent pump is 25 revolutions per minute.
The parameters of the chinlon 6 produced by the prior art are as follows: the fineness of the fiber is 22.5DTEX, the strength is 3.68 CN/DTEX elongation is 35.89%, the yarn evenness is 1.0%, the oil content is 3.0%, the boiling water content is 9.4%, and the network degree is 23/m. The parameters of the nylon-6 produced in this example are as follows: the fineness of the fiber is 22.5DTEX, the strength is 4.53 CN/DTEX elongation is 40%, the yarn evenness is 1.0%, the oil content is 3.0%, the boiling water content is 9.4%, and the network degree is 23/m. Through comparative analysis, the strength of the regenerated full-dull nylon 6 produced by the process is improved by 10-20%, the elongation is improved by 10-20%, and the dyeing rate is improved by 10-20%.
In another embodiment, the side wall of the discharge port at the lower end of the storage tank and the side wall of the feed port of the screw extruder are both connected with a nitrogen input pipe, and the nitrogen input pipe is connected with a nitrogen supply source (not shown in the figure) through a pipeline. Because screw extruder during operation temperature is higher, this leads to screw extruder ambient temperature around also higher, makes the inside lower extreme of storage tank be close to the section raw materials of discharge gate department and the section raw materials of the pan feeding mouth of screw extruder earlier by oxidation this moment easily, through letting in nitrogen gas, can play certain protection to the section raw materials, separation section raw materials and air contact under high temperature state prevent by the oxidation. The inside cooling jacket that is equipped with the cladding in the screw rod outside of screw extruder's feeding section, the outside of cooling jacket is equipped with the cooling chamber, the lower extreme of cooling chamber is connected with the cooling water input tube, and the upper end lateral wall of cooling chamber is connected with the cooling water output tube. Through at the screw rod outside cladding cooling jacket, and let in the cooling water, can cool off the protection to the section raw materials of the feeding section of screw extruder, prevent the high temperature.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A production process of regenerated full-dull nylon 6 filaments is characterized by comprising the following steps: the method comprises the following steps:
step S1: adding the regenerated slice raw material into a screw extruder, extruding and melting the regenerated slice raw material into a melt after passing through the screw extruder, and conveying the melt to each spinning box body through a melt pipeline;
step S2: the melt is metered and uniformly distributed into each spinning assembly by a metering pump, tows are extruded through a spinneret plate of each spinning assembly, and a first nitrogen protection device below a filament outlet of the spinneret plate protects the tows, prevents the tows from contacting air at a high temperature and prevents the tows from being oxidized;
step S3: then the tows are sequentially cooled by a side blowing system and oiled by an oil nozzle;
step S4: the oiled tows pass through the channel and then pass through the pre-interlacer, so that the surfaces of the tows are oiled uniformly;
step S5: the pre-wound tows sequentially enter a cold box and a hot box for stretching and shaping, a heating assembly in the cold box preheats the tows, a second nitrogen protection device in the hot box protects the tows, the tows are prevented from contacting air at a high temperature, and the tows are prevented from being oxidized;
step S6: and the filament bundle after stretching and shaping is subjected to net degree increase by a main net device and then is subjected to package forming by a winding machine after passing through a yarn guide disc.
2. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: the first nitrogen protection device comprises a first annular nitrogen output pipe, the first nitrogen output pipe is connected with a nitrogen supply source through a pipeline, the first nitrogen output pipe is annularly arranged below a filament outlet of the spinneret plate, and a plurality of first nitrogen output ports are distributed on the inner wall of the first nitrogen output pipe.
3. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 2, characterized in that: the nitrogen output pressure of the first nitrogen output port is 0.3M3/H。
4. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: the heating assembly comprises a pair of far infrared heaters which are vertically and fixedly installed on the left and right inner side walls of the cold box respectively.
5. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 4, characterized in that: the temperature adjusting range of the far infrared heater is 50-200 ℃.
6. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: one end of the bottom of the hot box is provided with a hot box wire inlet which is beneficial to the wire bundle to pass through; the second nitrogen protection device comprises a second nitrogen output pipe in an annular shape, the second nitrogen output pipe is connected with a nitrogen supply source through a pipeline, the second nitrogen output pipe is annularly arranged at the inner bottom of the hot box and sleeved outside the hot box wire inlet, and a plurality of second nitrogen output ports are distributed on the inner wall of the second nitrogen output pipe.
7. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 6, characterized in that: the nitrogen output pressure of the second nitrogen output port is 0.5M3/H。
8. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: in step S1, the vacuum-packed regenerated slice material packet is hoisted by an electric hoist and added into a corresponding bin, the regenerated slices in the bin are conveyed to a storage tank, and the storage tank adds the regenerated slice material into a screw extruder under the control of a material valve.
9. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: the spinning speed of the spinning assembly is 4300-; the speed of the cold roller in the cold box is 3600-; the speed of the hot roller in the hot box is 4400-4900m/min, the setting temperature of the hot roller in the hot box is 150-175 ℃, and the stretching ratio of the cold roller in the cold box to the hot roller in the hot box is 1.16-1.26; the speed of the godet is 4300 and 4800 m/min.
10. The production process of the regenerated full-dull nylon-6 filament yarn as claimed in claim 1, which is characterized in that: the wind temperature of the side blowing system is 20-24 ℃, and the wind speed is 0.40-0.58 m/s; the rotating speed of the metering pump is 8-15 revolutions per minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111637259.3A CN114262943A (en) | 2021-12-30 | 2021-12-30 | Production process of regenerated full-dull nylon 6 filament |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111637259.3A CN114262943A (en) | 2021-12-30 | 2021-12-30 | Production process of regenerated full-dull nylon 6 filament |
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| CN113265734A (en) * | 2021-06-16 | 2021-08-17 | 福建闽瑞新合纤股份有限公司 | Intelligent fiber stretching mechanism for producing composite ES short fibers |
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| US2509735A (en) * | 1947-03-14 | 1950-05-30 | Horsak Drahomir | Device for the production of artificial fibers |
| CN104329920A (en) * | 2014-10-24 | 2015-02-04 | 江苏广盛源科技发展有限公司 | High-performance fiber drying hotbox |
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Application publication date: 20220401 |