CN109811420B - PVDF fluorocarbon monofilament production device and production method - Google Patents
PVDF fluorocarbon monofilament production device and production method Download PDFInfo
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- CN109811420B CN109811420B CN201910222637.8A CN201910222637A CN109811420B CN 109811420 B CN109811420 B CN 109811420B CN 201910222637 A CN201910222637 A CN 201910222637A CN 109811420 B CN109811420 B CN 109811420B
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- 239000002033 PVDF binder Substances 0.000 title claims abstract description 41
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 41
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 67
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000002074 melt spinning Methods 0.000 claims abstract description 27
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 239000000155 melt Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009960 carding Methods 0.000 description 1
- 208000018999 crinkle Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The PVDF fluorocarbon monofilament production device comprises a frame, a melt extrusion mechanism and a cooling device, wherein the cooling device comprises a cooling water tank and at least one group of rolling clamping mechanisms, a stepped hot air device is arranged between the rolling clamping mechanisms and a spinneret plate and comprises a plurality of hot air pipes and a hot air adjusting pipe lifting frame, the hot air pipes are sleeved with each other in a stepped shape, a pipe body of each hot air pipe is arranged to be an air passage, an air inlet is arranged at the bottom of each hot air pipe, the air inlet is connected with a hot air generating device through an air inlet pipe, and a plurality of small holes are formed in the side wall of each hot air pipe on each step. According to the invention, by combining an air cooling technology and a water cooling technology, a cooling mode of stepped configuration temperature is adopted, and aiming at different forms, different positions and different temperatures in the monofilament cooling process, an air cooling mode and a water cooling mode with adjustable temperature and adjustable position are adopted to cool and shape the melt spinning, so that the problems of high crystallization speed and temperature sensitivity of PVDF raw materials in the melt spinning are mainly solved.
Description
Technical Field
The invention relates to a production device of a fishing line, in particular to a production device and a production method of PVDF fluorocarbon monofilaments.
Background
Polyvinylidene fluoride, the English abbreviation PVDF, has high requirements and great difficulty when producing monofilaments by adopting a melt spinning method due to the characteristics of high crystallization speed, special crystallization performance, high elastic modulus and the like of the raw material. In melt spinning, the PVDF raw material is particularly sensitive to temperature, and serious defects such as bubbles, crinkles, out-of-round, broken filaments and the like can be generated by quenching. In particular, when uniformly clustered PVDF raw materials are used, defects are more serious, resulting in the generation of a large amount of waste products.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the PVDF fluorocarbon monofilament production device which is reasonable in design and simple in structure.
The invention aims to solve the other technical problem of providing a production method of PVDF fluorocarbon monofilament, which is reasonable in design and solves the problem that PVDF raw materials are sensitive to temperature, aiming at the defects of the prior art.
The invention aims to solve the technical problems by the following technical scheme that the production device of PVDF fluorocarbon monofilaments comprises a frame, a melt extrusion mechanism and a cooling device, wherein the melt extrusion mechanism comprises a machine barrel, an extrusion screw rod rotationally arranged in the machine barrel and a spinneret plate arranged at a discharge hole of the machine barrel;
the stepped hot air device comprises a plurality of hot air pipes with different pipe diameters and different heights and a hot air pipe lifting frame for adjusting the height of the hot air pipes, wherein stepped hot air pipes are sleeved, the pipe body of each hot air pipe is provided with an air passing channel, the top end of each hot air pipe is closed, the bottom of each hot air pipe is provided with an air inlet, the air inlet is connected with a hot air generating device through an air inlet pipe, the side wall of each hot air pipe on each step is provided with a plurality of small holes for blowing out the air passing channel, and the small holes are symmetrically arranged on two sides of the hot air pipe.
The technical problem to be solved by the invention can also be achieved by the following technical scheme that the rolling clamping mechanisms are provided with two groups, and the two groups of rolling clamping mechanisms are arranged on two sides of the stepped hot air device side by side.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the rolling clamping mechanism consists of a supporting roller for bypassing spinning and a pneumatic pressing roller for pressing the spinning on the supporting roller, wherein the supporting roller is arranged on a cooling water tank through a bearing, the pneumatic pressing roller is arranged on the cooling water tank through a pressure adjusting mechanism, the supporting rollers are connected through a chain wheel and chain transmission mechanism in a transmission way, and the supporting rollers are all rubber rollers.
The technical problem to be solved by the invention can also be achieved by the following technical scheme that the pressure regulating mechanism is provided with a regulating arm, the middle part of the regulating arm is arranged on the side wall of the cooling water tank through a rotating shaft, one end of the regulating arm is provided with a bearing, a roller shaft of the pneumatic compression roller is arranged on the bearing, and the other end of the regulating arm is hinged with a driving cylinder arranged on the cooling water tank.
The technical problem to be solved by the invention can also be achieved by the following technical scheme that the hot air pipe lifting frame comprises a hot air pipe installation seat provided with a hot air pipe installation hole, a vertically arranged lifting rod is arranged on the hot air pipe installation seat, a sleeve is arranged on the lifting rod and is fixed on a cooling water tank, and a locking bolt matched with the lifting rod is arranged on the sleeve.
The technical problem to be solved by the invention can be further solved by the following technical scheme that two hot air pipes are arranged, and the inner hot air pipe extends out of the top of the outer hot air pipe to form a ladder shape.
The technical problem to be solved by the invention can be also realized by the following technical scheme, and the height of each layer of step is 20cm-40cm.
The technical problem to be solved by the invention can be also realized by the following technical scheme that the small hole obliquely upwards forms an included angle of 20-45 degrees with the horizontal line.
The invention aims to solve the technical problem by adopting the following technical scheme, the invention is a production method of PVDF fluorocarbon monofilaments, which is characterized in that the production device is adopted to prepare PVDF fluorocarbon monofilaments, the method comprises the steps of forming through a spinneret plate after melt spinning, downwards extending from two sides of a stepped hot air device, simultaneously sending 160-210 ℃ hot air into a hot air pipe on a top step, blowing 160-210 ℃ hot air into the melt spinning through a small hole of the hot air pipe to perform primary air cooling, simultaneously sending 80-120 ℃ hot air into a hot air pipe on a lower step, blowing 80-120 ℃ hot air into the melt spinning after primary air cooling through a small hole of the hot air pipe to perform secondary air cooling, then stretching out from the lower part of the stepped hot air device, cooling the melt spinning through room temperature, then entering a cooling water tank, and cooling through cooling water of 3-12 ℃.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the primary air cooling stroke is in the range of 0-20cm from the spinneret, the secondary air cooling stroke is in the range of 20-60cm from the spinneret, the room temperature cooling stroke is in the range of 60-90cm from the spinneret, and the water cooling distance is in the range of 10-30 cm.
Compared with the prior art, the invention autonomously designs the stepped hot air device, combines the air cooling and water cooling technology, adopts a cooling mode of stepped configuration temperature, adopts an air cooling and water cooling mode with adjustable temperature and adjustable position for cooling and shaping the melt spinning aiming at different forms, different positions and different temperatures in the monofilament cooling process, and mainly solves the problem of high crystallization speed of PVDF raw materials in the melt spinning, thereby solving the problem of sensitivity of PVDF raw materials to temperature.
Drawings
FIG. 1 is a schematic structural view of a PVDF fluorocarbon monofilament production apparatus;
FIG. 2 is a schematic view of a step-type hot air device;
FIG. 3 is a side view of FIG. 1;
fig. 4 is a top view of fig. 1.
Detailed Description
Specific embodiments of the invention will be further described below with reference to the accompanying drawings, in order to facilitate a further understanding of the invention by those skilled in the art, without limiting the scope of the claims thereto.
1, referring to fig. 1-4, a PVDF fluorocarbon monofilament production device comprises a frame, a melt extrusion mechanism and a cooling device, wherein the melt extrusion mechanism comprises a machine barrel, an extrusion screw rotatably arranged in the machine barrel and a spinneret plate 4 arranged at a discharge hole of the machine barrel, the cooling device comprises a cooling water tank 1 and at least one group of rolling clamping mechanisms arranged in the cooling water tank 1, a stepped hot air device 3 for providing hot air with different temperatures to cool melt spinning is arranged between the rolling clamping mechanisms and the spinneret plate 4, and the stepped hot air device 3 is fixedly arranged on the cooling water tank 1;
the stepped hot air device comprises a plurality of hot air pipes 7 with different pipe diameters and different heights and hot air pipe lifting frames for adjusting the height of the hot air pipes 7, wherein the hot air pipes 7 are sleeved in a stepped shape, the pipe body of each hot air pipe 7 is provided with an air passing channel 8, the top end of each hot air pipe 7 is arranged in a closed manner, the bottom of each hot air pipe 7 is provided with an air inlet 9, the air inlet 9 is connected with a hot air generating device through an air inlet pipe, the side wall of each hot air pipe 7 on each step is provided with a plurality of small holes 14 for blowing out air passing channels 8, the small holes 14 are symmetrically arranged on two sides of the hot air pipe 7, the purposes of saving energy and also can be uniformly arranged along the circumferential direction of the hot air pipe, the top end of the hot air pipe at the step of the top layer is in butt joint with a spinneret plate, the hot air generating device can be a hot air heater or a hot air generator, the hot air pipe outer cover is provided with a heat preservation cylinder with a heat preservation function, a spinning channel is formed between the heat preservation cylinder and the hot air pipe, and the hot air pipe lifting frames;
the hot air pipe lifting frame comprises a hot air pipe installation seat 10 provided with a hot air pipe installation hole, a lifting rod 13 vertically arranged is arranged on the hot air pipe installation seat 10, a sleeve 12 is arranged on the lifting rod 13, the sleeve is fixed on a cooling water tank, a locking bolt 11 matched with the lifting rod 13 is arranged on the sleeve 12,
a heating pipe 15 is also arranged in the cooling water tank 1, comb teeth for carding melt spinning are also arranged on two sides of the stepped hot air device, and the comb teeth are arranged on the cooling water tank.
In example 2, the apparatus for producing PVDF fluorocarbon monofilament according to example 1, wherein the two sets of rolling clamping mechanisms are disposed on two sides of the stepped hot air device.
The embodiment 3, the apparatus for producing PVDF fluorocarbon monofilament of embodiment 1-2, the rolling clamping mechanism is composed of a supporting roller 2 for spinning to bypass and a pneumatic pressing roller 16 for pressing the spinning on the supporting roller 2, the supporting roller 2 is mounted on the cooling water tank 1 through a bearing, the pneumatic pressing roller 16 is mounted on the cooling water tank 1 through a pressure adjusting mechanism, a supporting roller is additionally arranged below the two sets of rolling clamping mechanisms for separating the spinning on the front and back rolling clamping mechanisms, winding or stacking of the spinning is avoided, one supporting roller is a driving roller, the driving roller is connected with a servo motor mounted on the cooling water tank, the supporting rollers are connected through a sprocket chain transmission mechanism, thus synchronous operation of the two sets of rolling clamping mechanisms is realized, and the supporting rollers are all rubber rollers.
In the embodiment 4, the apparatus for producing PVDF fluorocarbon monofilament according to embodiments 1-3, the pressure adjusting mechanism is provided with an adjusting arm 5, the middle part of the adjusting arm 5 is mounted on the side wall of the cooling water tank 1 through a rotating shaft, one end of the adjusting arm 5 is provided with a bearing, the roller shaft of the pneumatic pressing roller 16 is mounted on the bearing, the other end of the adjusting arm 5 is hinged with a driving cylinder 6 mounted on the cooling water tank 1, and the driving cylinder is implemented by adopting a structure disclosed in the prior art.
In embodiment 5, the PVDF fluorocarbon monofilament production apparatus described in embodiments 1-4, the number of the hot air pipes 7 is two, and the inner layer hot air pipe extends from the top of the outer layer hot air pipe to form a step shape.
Example 6 an apparatus for producing PVDF fluorocarbon monofilament as described in examples 1-5, each step having a height of 20cm-40cm.
Example 7, examples 1-6, a PVDF fluorocarbon monofilament production apparatus, wherein the orifice 14 is angled obliquely upward at an angle of 20 ° -45 °, preferably 30 °, to the horizontal.
In the embodiment 8, the production device described in the embodiments 1-8 is adopted to prepare PVDF fluorocarbon monofilaments, the method comprises the steps of forming the PVDF fluorocarbon monofilaments through a spinneret plate 4, then stretching out downwards from two sides of a stepped hot air device, simultaneously sending 160 ℃ hot air into a hot air pipe 7 on a top step, blowing 160 ℃ hot air into the melt spinning through a small hole 14 of the hot air pipe 7, performing primary air cooling, simultaneously sending 80 ℃ hot air into the hot air pipe 7 on a lower step, blowing 80 ℃ hot air into the melt spinning after primary air cooling through the small hole 14 of the hot air pipe 7, performing secondary air cooling, stretching out of the lower part of the stepped hot air device, cooling at room temperature, then entering a cooling water tank 1, and cooling by using 3 ℃ cooling water.
In the embodiment 10, after the melt spinning is formed by a spinneret plate, the melt spinning extends downwards from two sides of a stepped hot air device, meanwhile, hot air at 210 ℃ is sent into a hot air pipe on a step of a top layer, the hot air at 210 ℃ is blown to the melt spinning through small holes of the hot air pipe to be subjected to primary air cooling, meanwhile, hot air at 120 ℃ is sent into the hot air pipe on a step of the lower layer, the hot air at 120 ℃ is blown to the melt spinning after the primary air cooling through small holes of the hot air pipe to be subjected to secondary air cooling, then the melt spinning extends out from the lower part of the stepped hot air device, and enters a cooling water tank after being cooled at room temperature, and then cooling is performed by cooling water at 12 ℃.
In the embodiment 11, after the melt spinning is formed by a spinneret plate, the melt spinning extends downwards from two sides of a stepped hot air device, meanwhile, hot air at 180 ℃ is sent into a hot air pipe on a step of a top layer, the hot air at 180 ℃ is blown to the melt spinning through small holes of the hot air pipe to be subjected to primary air cooling, meanwhile, hot air at 100 ℃ is sent into the hot air pipe on a step of the lower layer, the hot air at 100 ℃ is blown to the melt spinning after the primary air cooling through small holes of the hot air pipe to be subjected to secondary air cooling, then the melt spinning extends out from the lower part of the stepped hot air device, and enters a cooling water tank after being cooled at room temperature, and then cooling is performed by using cooling water at 6 ℃.
In the production method of PVDF fluorocarbon monofilaments described in embodiment 12 and embodiment 9-11, the primary air cooling stroke is in the range of 0-20cm from the spinneret, the secondary air cooling stroke is in the range of 20-60cm from the spinneret, the room temperature cooling stroke is in the range of 60-90cm from the spinneret, and the water cooling distance is in the range of 10-30 cm.
The invention adopts a production mode of mainly controlling temperature air cooling (accounting for about 70% -90%), and secondarily controlling water cooling (accounting for 10% -30%), and mainly solves the problem of high crystallization speed of PVDF raw materials in melt spinning, in particular, adopts a cooling mode of configuring temperature in a stepped way, and adopts air cooling and water cooling modes with adjustable temperature and adjustable position according to different forms, different positions and different temperatures in the monofilament cooling process during melt spinning.
In the range of 0-20cm from the lower part of the spinneret plate, when the monofilaments are in a molten state, hot air with high temperature of 160-210 ℃ is selected for cooling, and the height of the hot air pipe is adjusted through the hot air pipe lifting frame, so that the upper and lower positions of the small holes are adjusted;
in the distance range of 20-60cm from the lower part of the spinneret plate, when the monofilament is in a semi-molten state (the core of the monofilament is in a molten state), hot air with the medium temperature of 80-120 ℃ is selected for cooling, and the upper and lower positions of small holes are adjustable;
cooling at room temperature (20-40 ℃) when the monofilaments are in a high-elastic state within a distance range of 60-90cm below the spinneret plate;
in the range of 90-120cm from the spinneret plate, the monofilaments are in a solid state, water at the temperature of 3-12 ℃ is selected for cooling, and the water cooling distance can be adjusted according to the infiltration depth of the supporting roller.
The invention adopts a special stepped hot air device to cool the temperature in stepped configuration, has three functions, and can realize the controllability of the temperature, the wind speed and the position of hot air; secondly, the small holes are uniformly distributed, so that each group of monofilaments are uniformly cooled in an umbrella shape; and thirdly, the small hole forms an included angle of 200-450 with the horizontal line to generate wind direction and supporting force of an inclined plane upwards, and the drafting force of PVDF monofilaments due to dead weight can be counteracted while cooling.
In addition, the invention adopts a double-row (or single-row) rolling clamping mechanism with controllable linear speed to replace the traditional sliding transition mode; the servo motor can be controlled to accurately run by programming of a variable program controller, and the cooling speed required by monofilaments with different diameters is matched; the synchronous operation of the same group of monofilaments can be realized by adopting a rolling clamping mechanism with adjustable pressure; the invention designs the rolling clamping mechanism into a front-back double-row (relatively large wire diameter, which can be a single row) structure so as to ensure enough running space between monofilaments.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (10)
1. The utility model provides a PVDF fluorocarbon monofilament's apparatus for producing, includes frame, melt extrusion mechanism and cooling device, and melt extrusion mechanism includes the barrel, rotates the extrusion screw rod that sets up in the barrel and installs the spinneret in barrel discharge gate department, its characterized in that: the cooling device comprises a cooling water tank and at least one group of rolling clamping mechanisms arranged in the cooling water tank, wherein a stepped hot air device for providing hot air with different temperatures to cool melt spinning is arranged between the rolling clamping mechanisms and the spinneret plate, and the stepped hot air device is fixedly arranged on the cooling water tank;
the stepped hot air device comprises a plurality of hot air pipes with different pipe diameters and different heights and a hot air pipe lifting frame for adjusting the height of the hot air pipes, wherein stepped hot air pipes are sleeved, the pipe body of each hot air pipe is provided with an air passing channel, the top end of each hot air pipe is closed, the bottom of each hot air pipe is provided with an air inlet, the air inlet is connected with a hot air generating device through an air inlet pipe, the side wall of each hot air pipe on each step is provided with a plurality of small holes for blowing out the air passing channel, and the small holes are symmetrically arranged on two sides of the hot air pipe.
2. The apparatus for producing PVDF fluorocarbon monofilament according to claim 1, wherein: the rolling clamping mechanisms are provided with two groups, and the two groups of rolling clamping mechanisms are arranged on two sides of the stepped hot air device side by side.
3. The apparatus for producing PVDF fluorocarbon monofilament according to claim 2, wherein: the rolling clamping mechanism consists of a supporting roller for bypassing the spinning and a pneumatic compression roller for pressing the spinning on the supporting roller, the supporting roller is arranged on the cooling water tank through a bearing, and the pneumatic compression roller is arranged on the cooling water tank through a pressure adjusting mechanism.
4. A PVDF fluorocarbon monofilament production apparatus according to claim 3, wherein: the pressure regulating mechanism is provided with a regulating arm, the middle part of the regulating arm is arranged on the side wall of the cooling water tank through a rotating shaft, one end of the regulating arm is provided with a bearing, a roll shaft of the pneumatic press roll is arranged on the bearing, and the other end of the regulating arm is hinged with a driving cylinder arranged on the cooling water tank.
5. The apparatus for producing PVDF fluorocarbon monofilament according to claim 1, wherein: the hot-blast main crane include the hot-blast main mount pad that is equipped with hot-blast main mounting hole, install the lifter of vertical setting on the hot-blast main mount pad, be equipped with the sleeve pipe on the lifter, the sleeve pipe is fixed on cooling water tank, be equipped with on the sleeve pipe with lifter complex locking bolt.
6. The apparatus for producing PVDF fluorocarbon monofilament according to claim 1, wherein: the two hot air pipes are arranged, and the inner layer hot air pipe extends out of the top of the outer layer hot air pipe to form a ladder shape.
7. The apparatus for producing PVDF fluorocarbon monofilament according to claim 1, wherein: the height of each step is 20cm-40cm.
8. The apparatus for producing PVDF fluorocarbon monofilament according to claim 1, wherein: the small hole forms an included angle of 20-45 degrees with the horizontal line in an inclined way.
9. A method for producing PVDF fluorocarbon monofilament is characterized in that: the PVDF fluorocarbon monofilament is prepared with the production apparatus as set forth in any one of claims 1-8, and through forming with spinneret plate, extruding downwards from two sides of stepped hot blast apparatus, feeding 160-210 deg.c hot blast to the hot blast pipe in the top step, blowing 160-210 deg.c hot blast to the hot blast pipe for first stage air cooling, feeding 80-120 deg.c hot blast to the hot blast pipe in the lower step, blowing 80-120 deg.c hot blast to the first stage air cooled molten spinning, second stage air cooling, extruding from below the stepped hot blast apparatus, cooling in cooling water tank, and cooling with 3-12 deg.c cooling water.
10. The method for producing PVDF fluorocarbon monofilament according to claim 9, wherein: the primary air cooling stroke is in the range of 0-20cm from the spinneret plate, the secondary air cooling stroke is in the range of 20-60cm from the spinneret plate, the room temperature cooling stroke is in the range of 60-90cm from the spinneret plate, and the water cooling distance is in the range of 10-30 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910222637.8A CN109811420B (en) | 2019-03-22 | 2019-03-22 | PVDF fluorocarbon monofilament production device and production method |
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| CN201910222637.8A CN109811420B (en) | 2019-03-22 | 2019-03-22 | PVDF fluorocarbon monofilament production device and production method |
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| CN115182059B (en) * | 2022-06-13 | 2023-11-14 | 桐昆集团浙江恒超化纤有限公司 | Polyester fiber spinning equipment special for high-elastic spring spinning and spinning process |
| CN115948808B (en) * | 2023-01-15 | 2023-07-14 | 桐乡市佑通新材料有限公司 | Rapid cooling method for polyester staple fiber production |
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| CN209759650U (en) * | 2019-03-22 | 2019-12-10 | 连云港纶洋单丝科技有限公司 | Production device for PVDF (polyvinylidene fluoride) fluorocarbon monofilaments |
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