CN102691135A - Preparation method of asphalt base carbon staple fiber - Google Patents
Preparation method of asphalt base carbon staple fiber Download PDFInfo
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- CN102691135A CN102691135A CN2011100712182A CN201110071218A CN102691135A CN 102691135 A CN102691135 A CN 102691135A CN 2011100712182 A CN2011100712182 A CN 2011100712182A CN 201110071218 A CN201110071218 A CN 201110071218A CN 102691135 A CN102691135 A CN 102691135A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 7
- 238000002360 preparation method Methods 0.000 title claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 4
- 229910052799 carbon Inorganic materials 0.000 title abstract description 4
- 238000009987 spinning Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 25
- 238000003763 carbonization Methods 0.000 claims abstract description 19
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000004927 fusion Effects 0.000 claims abstract description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 21
- 239000004917 carbon fiber Substances 0.000 claims description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims description 2
- 238000005255 carburizing Methods 0.000 claims description 2
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- 238000006243 chemical reaction Methods 0.000 claims description 2
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
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- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
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- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 241000108463 Hygrophila <snail> Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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Abstract
The invention discloses a method for preparing carbon staple fiber by using asphalt slice as a raw material. The method comprises the following steps: screw fusion, filtering, metering, die head meltblown spinning, hot air cutting, negative pressure adsorption for net formation, pre-oxidation and relaxation carbonization. The method of the invention directly employs meltblown spinning of asphalt slice; cutting is carried out directly after spinning to form fibrofelt; and then pre-oxidation and carbonization are carried out. Therefore, the method has characteristics of short process flow, high output and low investment cost on equipment and supporting facility for workshop. During the whole production process, no pollution source as water, exhaust gas or waste residue, which harms the environment, is generated; meanwhile, as multiple energy saving measures are taken, equipment operation cost is reduced. Therefore, the product has low price and strong competitiveness both home and abroad.
Description
Affiliated technical field:
The present invention relates to a kind of is the preparation method of the short silk of raw material production carbon fiber with the pitch section; Mainly by screw rod fusion, filtration, metering, die head melt and spray that spinning, hot blast are cut off, negative-pressure adsorption becomes net, pre-oxidation, lax carbonization and other processes forms, and belongs to the preparation method of macromolecular material.
Background technology:
Carbon fiber is meant that phosphorus content is at the fiber more than 90%.Carbon fiber has good characteristics such as low-density, high strength, high-modulus, high temperature resistant, resist chemical, low resistance, high hot conduction, low-thermal-expansion, chemically-resistant radiation.The precursor of carbon fiber has three kinds: i.e. acrylic fibers precursor, pitch precursor and rayon fiber.The fiber that uses the carbonization of pitch precursor to form is called asphalt base carbon fiber.Carbon fiber generally all is the finished product that winding filament becomes pie; Development along with market, carbon fiber downstream; Need the short silk of carbon fiber to add to as filler in the engineering material such as polytetrafluoroethylene (PTFE); To improve the goods ABRASION RESISTANCE, make it under normal temperature or high temperature, all have good creep-resistant property, obtain reinforced effects preferably.Usually directly cut off and become short silk with carbon fiber filament.There is a shortcoming in this method: equipment yield is low, causes the price of the short silk of carbon fiber high, because long filament adopts wet spinning usually, and long flow path, speed is low, and every synnema bundle all will separate separately when drawing-off, pre-oxidation, carbonization, must not twist.And needed short silk not so high requirement aspect quality, fibre morphology on the market.
Summary of the invention:
The present invention provides a kind of output height, short, the small investment of flow process, and what product price was cheap is the preparation method of the short silk of raw material production carbon fiber with the pitch section.This method adopts and melts and sprays melt spinning, directly cuts off after the spinning, forms fibrofelt, carries out pre-oxidation, carbonization treatment again, has therefore shortened the flow process that staple fibre is produced greatly, has improved the output of production line simultaneously.
It is that producing through following operation of the short silk of raw material production carbon fiber realized that the present invention is achieved in that with the pitch section:
A. screw rod fusion
After the pitch section evenly was fed into screw rod, heat fused became liquid melts in screw extruder, and a small amount of bubble in the melt is discharged, and through fully mixing, metering, melt pressure is elevated to 4～6MPa, sends into the board plug type filter then.
B. filter
Adopt the board plug type filter, can onlinely switch, filtering accuracy 10～80 μ m, filtering material is a metal screen, filter periphery is provided with the electric boiling plate insulation.
C. metering
Through the measuring pump accurate measurement,, melt pressure after the metering is elevated to meets the scope that filament spinning component requires to guarantee the fiber number CV value (yarn unevenness) of fiber
D. die head melts and sprays spinning
Unlined garment shut die first melt spray spin processes is adopted in spinning; Melt after metering is sent to the spinning die head; The effect of unlined garment frame spinning die head is that melt is evenly distributed in the filament spinning component of elongated (about 50: 1 to 100: 1 of length and width ratio), and guarantees that the pressure of any spinneret orifice in whole fabric width scope is consistent.Form fabric width 0.5～3.0m curtain from filament spinning component spray silk back.
E. hot blast cuts off
The hot blast shearing device is set below spinnerets, and purpose is the staple fibre that the long fiber that does not solidify is fully as yet cut into certain-length.Two strands of high-pressure hot winds are clamping tow in the same way at a certain angle, and fiber is stretched, and the tensile force that receives when fiber is during greater than the intensity of spinnerets exit fiber, and fiber is just broken into staple fibre.
F. negative-pressure adsorption becomes net
Staple fibre is fallen on the network chain of pre-oxidation machine after hot blast cuts off.Because the short silk of asphalt base carbon fiber proportion is little, fiber is prone to disperse everywhere, therefore the negative-pressure adsorption device is set below network chain, and the inlet scoop of adsorbent equipment is provided with the conical distributor chamber, and aspiration channel links to each other with the conical distributor chamber.Evenly offer the air draught aperture on the aspiration channel.Above network chain, form the air-flow of certain speed during air draught, air-flow is carried staple fibre secretly and is flowed to network chain, on network chain, is piled into certain thickness fibrofelt.
G. pre-oxidation
Adopt stacked pre-oxidation machine, 2～5 layers of operated by rotary motion.In the pre-oxidation machine, feed hot-air (air is the mixture of oxygen and nitrogen); Fiber is heated under the effect of hot-air, and the oxygen atom infiltration also is diffused into fiber core, and combine with asphaltene molecule; Thereby improve the fusing point of fiber, with the carrying out of step operation carbonization after an action of the bowels.Because the diffusion velocity of oxygen molecule is slower, preoxidation time is longer, so the pre-oxidation machine is arranged to 2～5 layers, to reduce device length, reduces the factory building cost of investment.
H. lax carbonization
The purpose of carbonization is to make the carbon in the fiber form uniform graphitization crystal structure, improves the intensity and the modulus of fiber.Carbonization is more than 1000 ℃, and under relaxed state, carry out.Not oxidized when making the fiber high temperature carbonization, feed nitrogen in the equipment and protect.The carbide furnace subregion is carried out the control of temperature ladder, 1200 ℃ of maximum temperatures.
Using the inventive method, is in the short silk of the carbon fiber process of raw material producing with the pitch section, has the following advantages:
1. technological process is short, small investment.Owing to directly adopt the pitch section to melt and spray spinning, shortened technological process greatly, reduced the cost of investment of equipment and factory building auxiliary facility, and the raw material of pitch section is in liberal supply in the market.
2. equipment operating cost is low, environmental protection and energy saving, non-environmental-pollution.In whole process of production, the pollution that does not have waste water,waste gas and industrial residue etc. to influence environment produces, and simultaneously, owing to adopted multinomial conservation measures, energy consumption greatly reduces.As: adopt stacked pre-oxidation machine, the area of dissipation of equipment has only 1/3rd of common pre-oxidation machine; The wind cutting apparatus adopts high pressure draught, has reduced the consumption of hot-air.
3. the finished product price is low.Adopt the short silk of the carbon fiber price that this invention produces, and adopt carbon fiber filament to cut off to compare, only 1/3rd of latter's product price, have very big price advantage.
Description of drawings:
Fig. 1 is the process flow diagram of the embodiment of the invention;
The specific embodiment:
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1 is that the process that raw material is produced the short silk of carbon fiber may further comprise the steps with the pitch section:
1. the fusion of section
The pitch section evenly is fed into the screw feed mouth through pay-off, and heat fused becomes liquid melts in screw extruder.The screw rod middle part is provided with exhaust outlet, and exhaust outlet the place ahead is provided with damping ring, and the bubble that monomer and impurity produced in the raw material is discharged from exhaust outlet through the method for malleation deaeration.Screw speed is controlled by the pressure sensor at filter rear, 5～80r/min, and the melt after the exhaust is through fully mixing, metering, and melt pressure is elevated to 2～20MPa, sends into the board plug type filter then.The electrical heating of the peripheral branch of the sleeve of screw rod multi-region, temperature is controlled at 250～350 ℃.
2. the filtration of melt
Adopt the board plug type filter, can onlinely switch, pressure is controlled by screw rod before considering, and sets through electric control system, considers back pressure along with increasing service time of filter screen and raising, and when pressure reduction reached 2～5MPa before and after the filter screen, filter need switch.Filtering accuracy 10～80 μ m, filtering material is a stainless steel wire mesh, and filter periphery is provided with the electric boiling plate insulation, and holding temperature is at 250 ℃～350 ℃.
3. the metering of melt
Measure through high temperature resistant gear wheel metering pump, for the fiber number CV value (yarn unevenness) that guarantees fiber is not more than 5%, gear wheel metering pump measuring accuracy otherwise greater than 3%.Measuring pump adopts the synchronous motor frequency conversion drive, on the pipeline of measuring pump back pressure sensor is set, and this pressure signal is used for controlling the rotating speed of measuring pump, makes the spinning pressure of filament spinning component be stabilized in 1～20MPa, and undulating value is less than 5%.The measuring pump periphery is provided with the electric boiling plate insulation, and holding temperature is at 250 ℃～350 ℃.
4. the die head of melt melts and sprays spinning
The spinning of unlined garment frame meltblown beam is adopted in spinning; Melt after metering is sent to the spinning die head; Die head is the cuboid forging, and subdivision is 2 half blocks, and the molten chamber on the die joint is a unlined garment frame shape; The shape in molten chamber will be carried out accurate Calculation according to the principle of fluid uiform section uniform flow, makes the melt flow of die head slit outlet consistent.Around the die head electric heating tube is installed, is used for the insulation of die head, die head temperature maintains 250 ℃～350 ℃, and the die head periphery is provided with heat-insulation layer and temperature sensor.Filament spinning component be installed in die head under, suitable for readingly link to each other with the slit of die head.Distribution plate, metal screen are set in the assembly, and filter screen is 80～500 orders.Orifice diameter is Φ 0.5～5mm, draw ratio 1: 2～1: 15, and component pressure will remain on 1～20MPa.Assembly material is a heat-resistance stainless steel, and the die head material is a heat-resisting alloy steel.Form fabric width 0.5～3.0m fibre bundle curtain from filament spinning component spray silk back.
5. the hot blast of long filament cuts off
The method that adopts hot blast to stretch is cut off; Do not solidify fully as yet from the tow of spinnerets ejection, powerful relatively poor, tow constantly stretches under the clamping of hot blast; The tensile force that receives when fiber is during greater than the intensity of spinnerets exit fiber, and fiber is just broken into staple fibre.About the blowing angle of two groups of hot blasts can regulate, adjustment blowing angle, the power of hot blast clamping tow can change, thereby the length that causes tow to cut off is different.In order to practice thrift the hot blast use amount, the blowing mouth slit is transferred to as far as possible for a short time, and blast is high as far as possible.Adopt 2 grades or 3 grades of high pressure roots blower fans, blast reaches 0.01～0.20MPa, and wind-warm syndrome is controlled at 250 ℃～350 ℃.
6. the negative-pressure adsorption of staple fibre becomes net
Adopt negative-pressure adsorption to become the principle of net.Staple fibre is fallen on the network chain of pre-oxidation machine after hot blast cuts off.For fiber can not dispersed everywhere, therefore the negative-pressure adsorption device is set below network chain, the inlet scoop of adsorbent equipment is provided with the conical distributor chamber, and aspiration channel links to each other with the conical distributor chamber.Evenly offer the air draught aperture on the aspiration channel, blower fan carries out air draught to network chain continuously, makes the network chain top form the steady air flow of certain speed, and air-flow is carried staple fibre secretly and dropped on the certain thickness fibrofelt of formation on the network chain.Air draught speed is wanted evenly, otherwise can cause the fibrofelt thickness inconsistent.Air draught speed controlling in network chain place is at 2～30m/s, and too conference increases energy consumption, and too the snapshot of oneself rings the adsorption effect of staple fibre.
7. the pre-oxidation of fiber
The purpose of pre-oxidation is for fusing point that improves fiber and brute force; With the carrying out of a step operation carbonization after an action of the bowels; Mixture (being hot-air) through aerating oxygen and nitrogen in the pre-oxidation machine; Fiber is heated under the effect of hot-air, and the oxygen atom infiltration also is diffused into fiber core, and combine with asphaltene molecule.Because the diffusion velocity of oxygen molecule is slower, preoxidation time is longer, should be not less than 180 minutes, therefore will adopt stacked pre-oxidation machine, 2～5 layers of operated by rotary motion.The height dimension of wind box is controlled in the 500mm, otherwise the pre-oxidation machine is too high, influences the cost of investment of factory building, and operation simultaneously can be very inconvenient.The air nozzle wind speed is 2～20m/min, and the wind speed uniformity is not more than 10%, and subregion control temperature and amount of oxygen are wanted in pre-oxidation.Temperature is from 160 ℃～350 ℃ ladder settings, and oxygen-supplying amount reduces successively.Network chain speed is 0.5～5m/min, and the heat-insulation layer of pre-oxidation machine is not less than 150mm, guarantees that insulation layer surface temperature and ambient temperature differences are not more than 25 ℃, because this equipment cooling area is bigger, energy consumption is very big during the heat insulation effect difference, influences equipment operating cost.
8. the lax carbonization of fiber
For intensity and the modulus that improves fiber, make the carbon in the fiber form uniform graphitization crystal structure, must carry out carbonization to fiber.Carburizing temperature is more than 1000 ℃, and the short silk of carbon fiber requires fiber is carried out the carbonization under the relaxed state.Therefore in the body of heater high temperature resistant stainless steel network chain is set, not oxidized when making the fiber high temperature carbonization simultaneously, feed nitrogen in the equipment and protect.The carbide furnace subregion is carried out the control of temperature ladder, and 1200 ℃ of maximum temperatures, flue material are carbon silicon plate, and two-layer refractory brick thermal insulation layer is spread needle punched blanket above, and the top is an alumina silicate fiber felt.
Claims (1)
1. one kind is the preparation method of the short silk of raw material production carbon fiber with the pitch section; Mainly by screw rod fusion, filtration, metering, die head melt and spray that spinning, hot blast are cut off, negative-pressure adsorption becomes net, pre-oxidation, lax carbonization and other processes forms; It is characterized in that: pitch is cut into slices through series of processes one step forming on a group equipment; Produce the method for asphalt base carbon fiber, comprising:
A. screw rod fusion
The screw rod middle part is provided with exhaust outlet, and exhaust outlet the place ahead is provided with damping ring; Section heat fused in screw extruder becomes liquid melts, and discharges a small amount of bubble in the melt, then through fully mixing, metering; Melt pressure is elevated to 4～6Mpa; Screw speed is by the pressure sensor control at filter rear, and in 5～80r/min, screw rod discharging melt pressure is 1～15Mpa; The electrical heating of the peripheral branch of the sleeve of screw rod multi-region, temperature is controlled at 250～350 ℃;
B. filter
Adopt the board plug type filter, can onlinely switch, pressure was by the rotating speed control of screw rod before filter was considered; And through the electric control system setting, filtering accuracy 10～80 μ m, filtering material is a metal screen; Filter periphery is provided with the electric boiling plate insulation, and the filtering accuracy of filter is 10～80 μ m, and filtering material is a stainless steel wire mesh; Filter periphery is provided with the electric boiling plate insulation, and holding temperature is at 250 ℃～350 ℃;
C. metering
Measure through high temperature resistant gear wheel metering pump, measuring pump adopts the synchronous motor frequency conversion drive, on the melt pipeline of measuring pump back pressure sensor is set; The measuring pump periphery is provided with the electric boiling plate insulation; The gear wheel metering pump measuring accuracy is not more than 3%, and pressure stability is at 1～20MPa behind the pump, and undulating value is not more than 5%; The measuring pump periphery is provided with the electric boiling plate insulation, and holding temperature is at 250 ℃～350 ℃;
D. die head melts and sprays spinning
Adopt the spinning of unlined garment frame meltblown beam, the spinning die head is the cuboid forging, and subdivision is 2 half blocks, and the molten chamber on the die joint is a unlined garment frame shape; Electric heating tube is installed around the die head, the die head periphery is provided with heat-insulation layer and temperature sensor, filament spinning component be installed in die head under; Suitable for readingly link to each other with the slit of die head, distribution plate, metal screen are set in the assembly, die head temperature is controlled at 250 ℃～350 ℃; The assembly filter screen is 80～500 orders, and orifice diameter is Φ 0.5～5mm, draw ratio 1: 2～1: 15; Component pressure 1～20Mpa, assembly material are heat-resistance stainless steel, and the die head material is a heat-resisting alloy steel;
E. hot blast cuts off
The method that adopts hot blast to stretch is cut off; About the blowing angle of two groups of hot blasts be adjustable, adjustment blowing angle can change the power of hot blast clamping tow; Hot blast adopts 2 grades or 3 grades of high pressure roots blower fan pressurizations; The circulating fan that hot blast cuts off adopts 2 grades or 3 grades of high pressure roots blower fans, and blast reaches more than 0.01～0.20MPa, and wind-warm syndrome is controlled at 250 ℃～350 ℃;
F. negative-pressure adsorption becomes net
Adopt negative-pressure adsorption to become net.The negative-pressure adsorption device is arranged on the below of network chain, and the inlet scoop of adsorbent equipment is provided with the conical distributor chamber, and aspiration channel links to each other with the conical distributor chamber, evenly offers the air draught aperture on the aspiration channel, and network chain air draught speed is 5-30m/min;
G. pre-oxidation
Adopt stacked pre-oxidation machine, 2～5 layers of operated by rotary motion or multilayer more, the height dimension of slim wind box is less than 500mm; Preoxidation process subregion control temperature and oxygen-supplying amount, preoxidation time is not less than 180 minutes, network chain speed 0.5～5m/min; The air nozzle wind speed of slim wind box is 2～20m/min, and the wind speed uniformity is not more than 10%, pre-oxidation subregion control temperature and amount of oxygen; Temperature is from 160 ℃～350 ℃ ladder settings; Oxygen-supplying amount reduces successively, and the heat-insulation layer of pre-oxidation machine is not less than 150mm, and insulation layer surface temperature and ambient temperature differences are not more than 25 ℃;
H. lax carbonization
Adopt the lax carbonization of fiber, the high temperature resistant stainless steel network chain is set in the body of heater, the carbide furnace subregion is carried out the control of temperature ladder; The flue material is a carbon silicon plate, feeds nitrogen in the equipment and protects, and carburizing temperature is more than 1000 ℃; The flue material is a carbon silicon plate; The two-layer refractory brick thermal insulation layer of burner hearth is spread needle punched blanket above, and the top is an alumina silicate fiber felt.
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| CN 201110071218 CN102691135B (en) | 2011-03-24 | 2011-03-24 | Preparation method of asphalt base carbon staple fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI480438B (en) * | 2012-09-27 | 2015-04-11 | China Steel Corp | Fiber spinning device of carbon fiber |
| CN108950860A (en) * | 2018-05-29 | 2018-12-07 | 郑州豫力新材料科技有限公司 | Hydrophilic modifying polypropylene melt-blown producing technology of non-woven fabrics |
| CN113789607A (en) * | 2021-09-22 | 2021-12-14 | 辽宁兴汇碳材料科技有限公司 | Polyacrylonitrile-based fibrofelt and preparation method and application thereof |
| US11447893B2 (en) | 2017-11-22 | 2022-09-20 | Extrusion Group, LLC | Meltblown die tip assembly and method |
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|---|---|---|---|---|
| KR20010039114A (en) * | 1999-10-29 | 2001-05-15 | 김용민 | A pitch type carbon fiber, and a process of preparing for the same |
| CN1898422A (en) * | 2003-12-17 | 2007-01-17 | 株式会社吴羽 | Method for producing pitch-based carbon fiber sliver and spun yarn |
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2011
- 2011-03-24 CN CN 201110071218 patent/CN102691135B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010039114A (en) * | 1999-10-29 | 2001-05-15 | 김용민 | A pitch type carbon fiber, and a process of preparing for the same |
| CN1898422A (en) * | 2003-12-17 | 2007-01-17 | 株式会社吴羽 | Method for producing pitch-based carbon fiber sliver and spun yarn |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI480438B (en) * | 2012-09-27 | 2015-04-11 | China Steel Corp | Fiber spinning device of carbon fiber |
| US11447893B2 (en) | 2017-11-22 | 2022-09-20 | Extrusion Group, LLC | Meltblown die tip assembly and method |
| CN108950860A (en) * | 2018-05-29 | 2018-12-07 | 郑州豫力新材料科技有限公司 | Hydrophilic modifying polypropylene melt-blown producing technology of non-woven fabrics |
| CN113789607A (en) * | 2021-09-22 | 2021-12-14 | 辽宁兴汇碳材料科技有限公司 | Polyacrylonitrile-based fibrofelt and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN102691135B (en) | 2013-10-23 |
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Denomination of invention: A method for preparing asphalt based carbon fiber short fibers Granted publication date: 20131023 Pledgee: Industrial and Commercial Bank of China Limited Shaoyang West Lake Branch Pledgor: HUNAN SHAOYANG TEXTILE MACHINERY Co.,Ltd. Registration number: Y2024980000930 |