CN210314595U - Equipment for producing polytetrafluoroethylene brown fibers - Google Patents
Equipment for producing polytetrafluoroethylene brown fibers Download PDFInfo
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- CN210314595U CN210314595U CN201921010384.XU CN201921010384U CN210314595U CN 210314595 U CN210314595 U CN 210314595U CN 201921010384 U CN201921010384 U CN 201921010384U CN 210314595 U CN210314595 U CN 210314595U
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Abstract
The utility model relates to a production polytetrafluoroethylene brown fibrous equipment. The utility model discloses system equipment is including the compounding reation kettle that sets gradually, reation kettle, spinning platform, coagulating bath, drench and wash groove, oil groove, drying cabinet, sintering case, pressure and hold case, draft case, rolling machine etc. still be provided with the cooling rack between draft case and the rolling machine, fixed mounting has two or more chill rolls in the cooling rack, and it has the cooling water to annotate in the chill roll. Adopt the utility model discloses equipment production cellosilk, difficult disconnected silk, solidification and sintering process only need several seconds time in the production process, realized efficient industry serialization production in the true sense, the polytetrafluoroethylene cellosilk outward appearance brown color and luster that produces even, smooth burr-free, the utility model discloses equipment has increased cooling device rapidly, has further guaranteed that the fibre has higher strength.
Description
Technical Field
The utility model relates to a production polytetrafluoroethylene fibrous equipment, in particular to production polytetrafluoroethylene brown fibrous equipment.
Background
Polytetrafluoroethylene fiber (polytetrafluoroethylene fiber), [ -CF2-CF2- ] n, known as teflon in china. The synthetic fiber polytetrafluoroethylene fiber prepared by spinning or making a film and then cutting or fibrillating polytetrafluoroethylene serving as a raw material has the strength of 17.7-18.5 cN/dtex and the elongation of 25-50%. In the molecular structure, the fluorine atom volume is larger than that of the hydrogen atom, the binding force of the fluorocarbon bond is strong, the function of protecting the whole carbon-carbon main chain is played, the chemical stability of the polytetrafluoroethylene fiber is excellent, and the corrosion resistance is better than that of other synthetic fiber varieties; the surface of the fiber has wax feel and the friction coefficient is small; the actual use temperature is 120-180 ℃; it also has good weatherability and flexibility resistance, but poor dyeability and thermal conductivity, poor wear resistance, large thermal expansion coefficient, and easy generation of static electricity. The polytetrafluoroethylene fiber is mainly used as a high-temperature dust filter bag, a strong-corrosiveness-resistant filter material for filtering gas or liquid, a filler for a pump and a valve, a sealing tape, a self-lubricating bearing, a reinforcing material of a perfluorinated ion exchange membrane for alkali preparation, a tarpaulin of a rocket launching platform and the like.
The emulsion spinning method is one of the common production methods of polytetrafluoroethylene fibers, and is also a main method adopted in industry. Polytetrafluoroethylene emulsion (with the concentration of 60%) with the average molecular weight of about 300 ten thousand and the particle size of 0.05-0.5 m is mixed with fiber-forming carriers such as viscose fiber or polyvinyl alcohol to prepare spinning solution, the carriers are carbonized and removed at high temperature after spinning, and the polymer is sintered to continuously form fibers.
The Chinese patent CN200610145032.6 is named as a preparation method of polytetrafluoroethylene fiber, and discloses a method for preparing the polytetrafluoroethylene fiber by adopting polytetrafluoroethylene concentrated dispersion liquid, polyvinyl alcohol and persulfate for spinning, adopting sulfate to oxidize the polyvinyl alcohol in the sintering process, and quickly removing the polyvinyl alcohol, wherein the method has the advantages that the solidification time is 1-5 minutes, the solidification time is longer, and the length or the width of a solidification tank is too long and too wide to meet the production practice in order to realize continuous production of the process without stopping spinning; if a common coagulating tank is adopted, spinning is stopped, continuous production cannot be realized, the process of the method is complex, and the process is not easy to control.
The Chinese patent CN201310208405.X is named as a preparation method of polytetrafluoroethylene fiber, and discloses that polytetrafluoroethylene fiber is prepared by adopting polytetrafluoroethylene, cellulose carbamate, NaOH and the like, the carrier prepared by the method needs to reach a temperature environment of-5 ℃ to-10 ℃, the process conditions are harsh, the solidification time of the patent is 1-3 minutes, the sintering time is 5-10 minutes, and the sintering time of a coagulant is long, so that the industrial continuous production is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the problem of unreasonable design of polytetrafluoroethylene fiber production process in the prior art is solved, and a set of equipment for producing polytetrafluoroethylene fibers is designed.
The process steps for producing the polytetrafluoroethylene brown fiber by adopting the mesh production equipment of the utility model are as follows: (1) preparing spinning slurry; (2) spinning; (3) solidification and forming; (4) washing with water; (5) oiling; (6) drying; (7) sintering; (8) drafting; (9) cooling; (10) winding into strips;
firstly, preparing viscose, wherein the viscose comprises 5-10% of alpha-cellulose, 5-10% of NaOH and 80-90% of sodium xanthate by mass percent. And uniformly mixing 60% of polytetrafluoroethylene dispersion liquid and viscose to obtain spinning slurry, wherein the mass ratio of the polytetrafluoroethylene dispersion liquid to the viscose is as follows: 2.1-3.5:1. And (3) placing the spinning slurry into a standing reaction kettle for standing, keeping the temperature of the spinning slurry between 10 and 20 ℃, and keeping the storage time not more than 24 hours. The polytetrafluoroethylene brown fiber products meeting the client requirements on the market are not many, and an important reason is that the spun silk is easy to break in the process, and the research of the utility model people finds that the mass ratio of the polytetrafluoroethylene dispersion liquid to the viscose is as follows: 2.1-3.5:1, the fiber is not easy to break, the fiber has proper extension performance, can not retract after being made into a felt, and the appearance of the single fiber is smooth and has no burrs.
Then the spinning slurry is conveyed into a metering pump and is spun and formed by a spinneret plate, wherein the rotating speed of the metering pump is 3-8 r/min, the spinning speed is 6-8 m/min, and the pressure of the slurry is 1-2kg/cm2(ii) a The utility model discloses the quantity design of spinneret is through the continuous research of inventor and groping, and the utility model people discovers, on 0.05mm ~ 0.10mm, every square millimeter spinneret surface area, is provided with 0.354 ~ 0.637 spinneret orifices when the spinneret orifice diameter, combines follow-up technology after spouting the silk, shows the performance of preferred, for example maintains the continuous silk time length, and the sintering degree is high. Wherein, when the diameter of the spinneret orifice is 0.08mm, 0.354-0.637 spinneret orifices are arranged on the surface area of the spinneret plate per square millimeter, for example, the performance of the filament sprayed by the spinneret plate with the diameter of 60mm and the spinneret orifice with 1800 orifices is the best.
And (3) coagulating the fiber spun in the step (2) by a coagulating bath containing concentrated sulfuric acid, sodium sulfate and zinc sulfate, wherein the coagulating time is as follows: 4-5 seconds, and the temperature of the coagulating bath is 20-40 ℃; the process has very short coagulation time, and benefits from the formula of the coagulation bath, and the mass percentages of concentrated sulfuric acid, sodium sulfate and zinc sulfate in the coagulation bath are as follows: 1-6%, 5-15%, 0.5-4.5% and the balance of water. The solidification process is a process of neutralizing acid and alkali to generate fibers, wherein the sodium sulfate is used for controlling the fiber generation speed and ensuring that the fiber generation speed is not too high; the function of the zinc sulfate is to enhance the proper strength of the fiber when the fiber comes out of the coagulating bath, and ensure the subsequent process.
Then, hot water is sprayed on the fiber filaments for washing for about 30 seconds, the washing temperature is 80-90 ℃, and the washing speed is-10 m/min.
And (5) passing the fiber yarn through an oil groove filled with an oiling agent, and coating a layer of oiling agent on the surface of the fiber yarn, wherein the oiling agent comprises the following components in percentage by mass: 5-15 parts of white oil; 0.1-1 part of lanolin; 0.3-3 parts of monoglyceride; 0.1-2 parts of silicone oil; 0.5-5 parts of soft water. After the oiling process, each fiber yarn is wrapped by the oiling agent, the friction between the yarns is reduced, the fiber yarns are isolated and prevented from being adhered, if the fiber yarns are adhered, thousands of fiber yarns are adhered together, and the subsequent sintering and other processes cannot be smoothly carried out. Meanwhile, the oiling agent increases the flexibility of the fiber, helps heat conduction and promotes subsequent crystallization.
And then, the fiber yarns enter a drying box for drying, a plurality of heating rollers are arranged in the drying box, the surface temperature of the rollers is 100-. Most of the finish oil had evaporated during the drying process.
Further, sintering in the step (7), wherein the dried fiber filaments enter a sintering box, the sintering box is provided with a plurality of sintering rollers with the surface temperature of 380-420 ℃, and the sintering time is 4-8 seconds;
further, drawing in step (8), wherein the sintered fiber is put into a drawing box for drawing, the drawing speed is 3.5-8 m/min, the drawing multiple is 6-9 times, and the temperature is 340-;
further, step (9) is that the fiber yarn is rapidly cooled by the surface of a cooling roller filled with cooling water of 6-8 ℃, the cooling time is 2-3 seconds, and the temperature of the fiber yarn is reduced to room temperature from about 200 ℃. The step is a rapid cooling process, the rapid cooling can improve the crystallinity of the fiber, simultaneously improve the strength of the fiber and ensure the quality of the fiber yarn produced by the process.
Further, the cooled filaments are wound into a strip.
Further, the technology can also comprise (11) carding; (12) curling; (13) shearing; (14) and (4) opening. And (3) preparing short fibers meeting the downstream felting requirement through 11-14 steps.
According to the utility model discloses production polytetrafluoroethylene brown fibrous method, the inventor designs one set of production polytetrafluoroethylene fibrous equipment that is fit for this technology, including the compounding reation kettle that sets gradually, reation kettle that stews, spinning platform, coagulating bath, drench wash tank, oil groove, drying cabinet, sintering box, pressure hold case, draft case, rolling machine, the utility model discloses still be provided with the cooling frame between draft case and the rolling machine, fixed mounting has two or more chill rolls in the cooling frame, and the interior notes have the cooling water of cooling roll. Compared with the prior art the utility model discloses equipment has increased the cooling frame, and the cellosilk has increased the degree of crystallinity through rapid cooling in the cooling frame, has improved fiber strength.
The utility model discloses production polytetrafluoroethylene brown fibrous equipment, the sintering incasement is fixed with a plurality of sintering rollers, for example 3, 5 etc, the utility model discloses a column metal sintering roller rather than the planar metal sheet sintering device in the prior art. The box body with the same volume adopts the rollers, so that the heat contact area is larger, the number of the rollers is small, the occupied area is small, and the area of the planar sintered metal plate is large; meanwhile, the temperature is high during sintering, the heat radiation is large, closed sintering is needed, the heat preservation requirement of the sintering process is high, the occupied area of the roller is small, and the energy is saved. In addition, fewer rollers make handling easier when first drawing the fibers into the sinter box.
The utility model discloses production polytetrafluoroethylene brown fibrous equipment, the draft incasement is fixed with the draft metal sheet, and it is the arch metal sheet that the surface has the radian, and the cellosilk gets into the draft case through drawing, and the draft metal sheet is not the plane metal sheet, and its surface has the radian, and also the draft metal sheet surface is an arched convex metal surface exactly, and the cellosilk receives to draw when the metal sheet surface passes through, and convex surface can make the more inseparable laminating of cellosilk on the draft metal sheet surface, can make the cellosilk be heated more evenly.
When preparing the brown short fiber of polytetrafluoroethylene that directly supplies to the downstream felting enterprise, the utility model discloses an equipment still includes carding machine, crimper, shearing mechanism, the opener that continues behind the aforementioned equipment in proper order.
The utility model discloses has positive effect: the utility model discloses production polytetrafluoroethylene cellosilk in-process is difficult for disconnected silk, solidification and sintering process only need the time of several seconds, has realized efficient industrial continuous production in the true sense, and the polytetrafluoroethylene cellosilk outward appearance brown color and luster that produces is even, smooth burr-free, the utility model discloses equipment has increased cooling device rapidly, has further guaranteed that the fibre has higher strength. The utility model discloses equipment design is reasonable, and is energy-conserving easy operation more.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural diagram of the production equipment of the present invention.
Fig. 2 is a schematic view of the structure of the drawn metal plate.
Wherein, 1 mixing reaction kettle, 2 standing reaction kettle, 3 spinning platform, 4 coagulating bath, 5 spraying bath, 6 oil bath, 7 drying box, 8 sintering box, 9 pressing box, 10 drafting box, 11 cooling rack, 12 winding machine, 81 sintering roller, 101 drafting metal plate, 111 cooling roller.
Detailed Description
The utility model discloses equipment for producing polytetrafluoroethylene brown long fiber is including arranging into a line in proper order and fixing respectively at workshop subaerial compounding reation kettle 1, reation kettle 2 that stews, spinning platform 3, coagulating basin 4, drench and wash tank 5, oil groove 6, drying cabinet 7, sintering bin 8, pressure hold case 9, draft case 10, cooling frame 11, rolling machine 12. Wherein the mixing reaction kettle 1, the standing reaction kettle 2 and the spinning platform 3 are sequentially connected through pipelines. A plurality of sintering rollers 81 are fixed in the sintering box 8, a drawing metal plate 101 with an arched surface is fixed in the drawing box 10, and two or more cooling rollers 111 are fixed in the cooling rack 11.
The utility model discloses equipment of production polytetrafluoroethylene brown short-staple is including arranging into a line in proper order and fixing respectively at workshop subaerial compounding reation kettle 1, reation kettle 2 that stews, spinning platform 3, coagulating basin 4, drench washing tank 5, oil groove 6, drying cabinet 7, sintering bin 8, pressing and holding case 9, draft case 10, cooling frame 11, rolling machine 12, carding machine, crimping machine, shearing mechanism, opener. Wherein the mixing reaction kettle 1, the standing reaction kettle 2 and the spinning platform 3 are sequentially connected through pipelines. A plurality of sintering rollers 81 are fixed in the sintering box 8, a drawing metal plate 101 with an arched surface is fixed in the drawing box 10, and two or more cooling rollers 111 are fixed in the cooling rack 11.
(example 1)
Weighing the components of the viscose according to the following formula:
alpha-cellulose 5kg
NaOH 10kg
85kg of sodium xanthate
Mixing the above materials uniformly to obtain viscose
The components of the coagulation bath are weighed according to the following formula:
adding the components into a coagulating tank, and uniformly mixing to obtain the coagulating bath.
The components of the coagulation bath are weighed according to the following formula:
the components are mixed and then added into an oil groove.
The spinning dope is prepared according to the following formula:
39.27kg of polytetrafluoroethylene dispersion (60%)
18.71kg of viscose
Placing polytetrafluoroethylene dispersion and viscose into a mixing reaction kettle 1, uniformly mixing, filtering by a vacuum pump, conveying to a standing reaction kettle 2, standing for more than 2 hours, conveying spinning slurry into a spinning device on a spinning platform 3, and ejecting fiber yarns by a metering pump and a spinneret plate, wherein the rotating speed of the metering pump is 3 revolutions per minute, the capacity of the metering pump is 0.6CC revolutions per minute, and the pressure of the slurry is 1kg/cm2The spinneret plate is a circular-surface spinneret plate, the diameter of the spinneret surface is 60mm, the aperture of each spinneret orifice is 0.08mm, and the number of the spinneret orifices is 1800, namely 0.637 spinneret orifices are arranged on the surface area of the spinneret plate per square millimeter. The fiber yarn is drawn into a coagulating tank 4, the coagulating bath temperature in the coagulating tank is 20 ℃, the total time of the fiber yarn passing through the coagulating tank 4 is 4 seconds, then the fiber yarn is drawn into a leaching tank 5, the fiber yarn is leached for 30 seconds by water at the temperature of 80 ℃, the water washing speed is 6 m/min, then the fiber yarn is drawn into an oil tank 6 for oiling, the oiling temperature is normal temperature, the oiled fiber yarn is drawn into a drying box 7, 5 heating rollers are arranged in the drying box 7, the surface temperature of the rollers is 100-,the total drying time of the fiber filaments passing through the heating roller is 30-40 seconds, then the fiber filaments are drawn into a sintering box 8, 5 sintering rollers 81 with the surface temperature of 380-420 ℃ are fixed in the sintering box 8, the sintering time is 4-6 seconds, the sintered fiber filaments enter a drawing box 10 for drawing, a drawing metal plate 101 with the surface being arched is fixed in the drawing box 10, the drawing speed is 3.5 m/min, the drawing multiple is 6 times, the temperature is 340-360 ℃, the drawn fiber filaments are drawn into a cooling rack 11, 2 cooling rollers 111 are fixed in the cooling rack 11, soft water with the temperature of 6-8 ℃ is injected into the rollers, and finally the cooled fiber filaments are wound into strips by a winding machine 12.
The filament produced in this example was numbered P-1.
(example 2)
Weighing the components of the viscose according to the following formula:
alpha-cellulose 8kg
NaOH 7kg
85kg of sodium xanthate
Mixing the above materials uniformly to obtain viscose
The components of the coagulation bath are weighed according to the following formula:
adding the components into a coagulating tank, and uniformly mixing to obtain the coagulating bath.
The components of the coagulation bath are weighed according to the following formula:
the components are mixed and then added into an oil groove.
The spinning dope is prepared according to the following formula:
44.43kg of polytetrafluoroethylene dispersion (60%)
Viscose 16.57kg
Putting the polytetrafluoroethylene dispersion liquid and the viscose into a mixing reaction kettle 1, uniformly mixing, filtering by a vacuum pump, and mixingDelivering to a standing reaction kettle 2, standing for more than 2 hours, delivering spinning slurry to a spinning device on a spinning platform 3, and spraying fiber yarns through a metering pump and a spinning plate, wherein the rotating speed of the metering pump is 4 rpm, the capacity of the metering pump is 0.6 CC/r, and the pressure of the slurry is 1kg/cm2The spinneret plate is a circular-surface spinneret plate, the diameter of the spinneret surface is 60mm, the aperture of each spinneret hole is 0.08mm, and the number of the spinneret holes is 1800. The fiber yarn is drawn into a coagulating tank 4, the coagulating bath temperature in the coagulating tank is 25 ℃, the total time of the fiber yarn passing through the coagulating tank 4 is 4 seconds, then the fiber yarn is drawn into an elution tank 5, the fiber yarn is eluted for 35 seconds by water at 85 ℃, the washing speed is 7 m/min, then the fiber yarn is drawn into an oil groove 6 for oiling, the oiling temperature is normal temperature, the oiled fiber yarn is drawn into a drying box 7, 7 heating rollers are arranged in the drying box 7, the surface temperature of the rollers is 100-, the drafting speed is 5.5 m/min, the drafting multiple is 7 times, the temperature is 340-360 ℃, the drafted fiber is drafted into a cooling rack 11, 2 cooling rollers 111 are fixed in the cooling rack 11, soft water at 7-8 ℃ is injected into the rollers, and finally the cooled fiber is wound into strips by a winding machine 12.
The filament produced in this example was numbered P-2.
(example 3)
Weighing the components of the viscose according to the following formula:
alpha-cellulose 9kg
NaOH 5.5kg
85.5kg of sodium xanthate
Mixing the above materials uniformly to obtain viscose
The components of the coagulation bath are weighed according to the following formula:
adding the components into a coagulating tank, and uniformly mixing to obtain the coagulating bath.
The components of the coagulation bath are weighed according to the following formula:
the components are mixed and then added into an oil groove.
The spinning dope is prepared according to the following formula:
polytetrafluoroethylene dispersion (60%) 19.33kg
Viscose glue 57.99kg
Placing polytetrafluoroethylene dispersion and viscose into a mixing reaction kettle 1, uniformly mixing, filtering by a vacuum pump, conveying into a standing reaction kettle 2, standing for more than 2 hours, conveying spinning slurry into a spinning device on a spinning platform 3, and ejecting fiber yarns by a metering pump and a spinneret plate, wherein the rotating speed of the metering pump is 5 revolutions per minute, the capacity of the metering pump is 0.6CC revolutions per minute, and the pressure of the slurry is 1.5kg/cm2The spinneret plate is a circular-surface spinneret plate, the diameter of the spinneret surface is 60mm, the aperture of each spinneret hole is 0.08mm, and the number of the spinneret holes is 1800. The fiber yarn is drawn into a coagulating tank 4, the coagulating bath temperature in the coagulating tank is 35 ℃, the total time of the fiber yarn passing through the coagulating tank 4 is 5 seconds, then the fiber yarn is drawn into a leaching tank 5, leaching is carried out for 30 seconds at 88 ℃, the water washing speed is 8 m/min, then the fiber yarn is drawn into an oil groove 6 for oiling, the oiling temperature is normal temperature, the oiled fiber yarn is drawn into a drying box 7, 5 heating rollers are arranged in the drying box 7, the surface temperature of the rollers is 100-, the drawing speed is 7.5 m/min, the drawing multiple is 8 times, and the temperature isThe temperature is 350-.
The filament produced in this example was numbered P-3.
(example 4)
Weighing the components of the viscose according to the following formula:
alpha-cellulose 9.7kg
NaOH 5.0kg
85.3kg of sodium xanthate
Mixing the above materials uniformly to obtain viscose
The components of the coagulation bath are weighed according to the following formula:
adding the components into a coagulating tank, and uniformly mixing to obtain the coagulating bath.
The components of the coagulation bath are weighed according to the following formula:
the components are mixed and then added into an oil groove.
The spinning dope is prepared according to the following formula:
45.12kg of polytetrafluoroethylene dispersion (60%)
Viscose 12.89kg
Placing polytetrafluoroethylene dispersion and viscose into a mixing reaction kettle 1, uniformly mixing, filtering by a vacuum pump, conveying into a standing reaction kettle 2, standing for more than 2 hours, conveying spinning slurry into a spinning device on a spinning platform 3, and ejecting fiber yarns by a metering pump and a spinneret plate, wherein the rotating speed of the metering pump is 7 revolutions per minute, the capacity of the metering pump is 0.6CC revolutions per minute, and the pressure of the slurry is 2.5kg/cm2The spinneret plate is a circular spinneret plate, the diameter of the spinneret surface is 60mm, the aperture of each spinneret hole is 0.08mm, and the number of the spinneret holes is 1600.The fiber yarn is drawn into a coagulating tank 4, the coagulating bath temperature in the coagulating tank is 45 ℃, the total time of the fiber yarn passing through the coagulating tank 4 is 5 seconds, then the fiber yarn is drawn into an elution tank 5, the fiber yarn is eluted for 35 seconds by 88 ℃ water, the washing speed is 7 m/min, then the fiber yarn is drawn into an oil groove 6 for oiling, the oiling temperature is normal temperature, the oiled fiber yarn is drawn into a drying box 7, 5 heating rollers are arranged in the drying box 7, the surface temperature of the rollers is 100-, the drafting speed is 8 m/min, the drafting multiple is 9 times, the temperature is 350-.
The filament produced in this example was numbered P-4.
(example 5)
Weighing the components of the viscose according to the following formula:
alpha-cellulose 9kg
NaOH 5.5kg
85.5kg of sodium xanthate
Mixing the above materials uniformly to obtain viscose
The components of the coagulation bath are weighed according to the following formula:
adding the components into a coagulating tank, and uniformly mixing to obtain the coagulating bath.
The components of the coagulation bath are weighed according to the following formula:
the components are mixed and then added into an oil groove.
The spinning dope is prepared according to the following formula:
polytetrafluoroethylene dispersion (60%) 19.33kg
Viscose glue 57.99kg
Placing polytetrafluoroethylene dispersion and viscose into a mixing reaction kettle 1, uniformly mixing, filtering by a vacuum pump, conveying into a standing reaction kettle 2, standing for more than 2 hours, conveying spinning slurry into a spinning device on a spinning platform 3, and ejecting fiber yarns by a metering pump and a spinneret plate, wherein the rotating speed of the metering pump is 5 revolutions per minute, the capacity of the metering pump is 0.6CC revolutions per minute, and the pressure of the slurry is 1.5kg/cm2The spinneret plate is a circular-surface spinneret plate, the diameter of the spinneret surface is 60mm, the aperture of each spinneret hole is 0.08mm, and the number of the spinneret holes is 1500. The fiber yarn is drawn into a coagulating tank 4, the coagulating bath temperature in the coagulating tank is 35 ℃, the total time of the fiber yarn passing through the coagulating tank 4 is 5 seconds, then the fiber yarn is drawn into a leaching tank 5, leaching is carried out for 30 seconds at 88 ℃, the water washing speed is 8 m/min, then the fiber yarn is drawn into an oil groove 6 for oiling, the oiling temperature is normal temperature, the oiled fiber yarn is drawn into a drying box 7, 5 heating rollers are arranged in the drying box 7, the surface temperature of the rollers is 100-, the drafting speed is 7.5 m/min, the drafting multiple is 8 times, the temperature is 350-360 ℃, the drafted fiber is drafted into a cooling rack 11, 3 cooling rollers 111 are fixed in the cooling rack 11, soft water at 7-8 ℃ is injected into the rollers, and finally the cooled fiber is wound into strips by a winding machine 12. And then, carding the wound slivers by a carding machine, curling by a curling machine according to market requirements, wherein the waviness of the curl is 3-10 mm, shearing the slivers into short filaments with the length of 50-100 mm by a shearing machine, and finally opening the short filaments into uniform polytetrafluoroethylene short fibers by an opener.
The filament produced in this example was numbered P-5.
(example 6)
The spinneret of this example has 1000 orifices, i.e., orifice diameter of 0.08mm, and 0.354 orifices per square millimeter of the spinneret surface area, and the rest is the same as (example 1).
The filament produced in this example was numbered P-6.
(example 7)
This example is a comparative example, with 2500 orifices in the spinneret, the rest being the same as in example 1.
The filament produced in this example was numbered P-7.
(example 8)
This example is a comparative example, and 3000 orifices were formed in the spinneret, and the rest was the same as in example 1.
The filament produced in this example was numbered P-8.
The upper table shows that the fiber produced by the method of the utility model has good appearance and high fiber strength. Meanwhile, the diameter of the spinneret orifice is 0.08mm, and 0.354-0.637 spinneret orifices are arranged on the surface area of the spinneret plate per square millimeter, namely when the diameter of the spinneret surface of the spinneret plate is 60mm, the number of the spinneret orifices is most suitable for 1000-1800, and 1800 is the most suitable.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. An apparatus for producing polytetrafluoroethylene brown fibers, characterized in that: including compounding reation kettle (1), the reation kettle (2) that stews that sets gradually, spinning platform (3), coagulating basin (4), drip washing groove (5), oil groove (6), drying cabinet (7), sintering case (8), pressure hold case (9), draft case (10), rolling machine (12), still be provided with cooling rack (11) between draft case (10) and rolling machine (12), fixed mounting has two or more chill roll (111) in cooling rack (11), annotates in chill roll (111) and has the cooling water.
2. The apparatus for producing polytetrafluoroethylene brown fiber according to claim 1, wherein: the spinning platform (3) is provided with a spinning device which comprises a metering pump and a spinneret plate, the diameter of the spinneret plate spinneret hole is 0.08mm, and 1800 spinneret holes are formed in the surface area of the spinneret plate with the diameter of 60 mm.
3. The apparatus for producing polytetrafluoroethylene brown fiber according to claim 1, wherein: a plurality of sintering rollers (81) are fixed in the sintering box (8).
4. The apparatus for producing polytetrafluoroethylene brown fiber according to claim 1, wherein: a drafting metal plate (101) is fixed in the drafting box (10), and the drafting metal plate (101) is an arched metal plate with a radian on the surface.
5. An apparatus for producing polytetrafluoroethylene brown fibers, characterized in that: the device also comprises a carding machine, a crimping machine, a shearing device and an opener which are arranged in sequence.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184661A (en) * | 2019-07-02 | 2019-08-30 | 常州蓦晟非织造有限公司 | A kind of preparation method and equipment of polytetrafluoroethylene (PTFE) brown fibre |
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- 2019-07-02 CN CN201921010384.XU patent/CN210314595U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184661A (en) * | 2019-07-02 | 2019-08-30 | 常州蓦晟非织造有限公司 | A kind of preparation method and equipment of polytetrafluoroethylene (PTFE) brown fibre |
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Decision date of declaring invalidation: 20220314 Decision number of declaring invalidation: 54593 Granted publication date: 20200414 |