CN100519847C - Method for drying extractant during production of superhigh-molecular weight polyvinyl fibre - Google Patents
Method for drying extractant during production of superhigh-molecular weight polyvinyl fibre Download PDFInfo
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- 238000001035 drying Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 229920002554 vinyl polymer Polymers 0.000 title description 2
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- 239000001569 carbon dioxide Substances 0.000 claims description 6
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 abstract description 30
- 239000003795 chemical substances by application Substances 0.000 abstract 3
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Abstract
A method for drying extracting agent during production of ultrahigh-molecular weight polythene fiber is carried out by mixing ultrahigh-molecular weight polythene powders with accessory and solvent, dissolving, extruding, coagulation forming, removing solvent, drying to remove extracting agent, and thermal stretching to obtain the final product. It adopts methylene chloride as extracting agent. Drier is divided into two, three, four or above temperature zones by discharging directions. It's cheap and has low dry temperature and prevents water content from being frozen.
Description
Technical field
The invention belongs to field of polymer material preparing technology, particularly the employing carrene in the superhigh molecular weight polyethylene fibers production technology is the drying process method of extractant.
Background technology
Superhigh molecular weight polyethylene fibers claims high strength and modulus polyethylene fiber, high-orientation polyethylene fiber, high-performance polyethylene fibres again.Superhigh molecular weight polyethylene fibers has high strength, high-modulus, high-orientation, is widely used in the manufacturing of shellproof protective articles, rope, hawser, fishnet, sports equipment.Superhigh molecular weight polyethylene fibers is the highest commercialization high-performance fiber of present specific strength.
Smith of Dutch DSM N. V. in 1979 and Lemstra have invented gel spinning and have produced the technology of superhigh molecular weight polyethylene fibers, and have obtained BP GB2042414 and GB2051667.Nineteen eighty-two, the AlliedSignal company (1999 with Honeywell company amalgamation, claim Honeywell company) of the U.S. also proposed the patent US4413110 of the production superhigh molecular weight polyethylene fibers of oneself.DSM N. V. has realized the suitability for industrialized production of gel spinning legal system superhigh molecular weight polyethylene fibers in nineteen ninety.
The main technique step of now common in the world gel spinning manufactured superhigh molecular weight polyethylene fibers comprises: ultra-high molecular weight polyethylene is dissolved in first solvent is mixed with polyethylene solution, this solution is extruded by screw extruder, after the spinning manifold ejection, cooled and solidified becomes gelatinous fibre (gel fiber), be called as-spun fibre, use volatile second solvent (extractant) to extract first solvent again, surpass the drawing-off and the heat setting process of the hot drawing-off of multiple at last, finally obtain finished fiber.
Production technology mainly contains two big classes in the world now, and a class is spun dry spinning method into representative with DSM and Japan, and another kind of is the wet spinning process of representative with Honeywell.Both main distinctions are to have adopted different solvents and subsequent technique.DSM process using decahydronaphthalene solvent.Decahydronaphthalene is volatile, can adopt dry spinning, has saved extraction workshop section thereafter; Honeywell adopts the paraffin oil solvent, needs follow-up extraction workshop section, with second solvent (extractant) first solvent extraction is come out.
Generally speaking, as the intrinsic viscosity of the polyethylene powders of raw material 5dL/g at least, the fibre strength of making like this is at least 25cN/dtex, and modulus is at least 700cN/dtex.The relative molecular weight of material polyethylene must be greater than 1,000,000, more preferably greater than 4,000,000.
The paraffin oil that companies such as Honeywell adopt claims mineral oil or white oil again.Be generally boiling point and be higher than 200 ℃ hydrocarbon mixture.
The ultra-high molecular weight polyethylene as-spun fibre that gel spinning forms, a large amount of solvents are contained in inside, network structure is comparatively loose, active force between the vinyl polymer chain is less, slippage between the macromolecular chain can take place when stretching, thereby be difficult to produce effective stretching that macromolecular chain is orientated, can't produce the fiber product of high strength and modulus.Therefore before drawing-off, must remove a large amount of solvent that exists in the fiber by extraction and dried.
In the superhigh molecular weight polyethylene fibers production process, the extractant of use has industrial naptha, kerosene, benzene,toluene,xylene, fluorochlorohydrocarbon, benzinum, halogenated hydrocarbons etc., also has the mixture of other hydro carbons etc.Desirable extractant not only needs good effect of extracting, also needs low toxicity, safety, lower-price characteristic.
Carrene is a kind of common organic solvent, has characteristics such as nonflammable, volatile, low boiling.Carrene is colourless, transparent, heavier than water, volatile liquid, and the smell and the sweet taste of similar ether arranged, and does not burn.Carrene is slightly soluble in water, and the organic solvent of using always with the overwhelming majority dissolves each other, and is also can arbitrary proportion miscible with other chlorinated solvents, ether, ethanol.Absolute dichloromethane does not have flash-point, and the solvent mixture that contains isopyknic carrene and gasoline, solvent naphtha or toluene is nonflammable.
Compare with extractants such as industrial naptha, kerosene, benzene,toluene,xylene and benzinums, carrene has good safety in utilization.The low boiling of carrene, volatile characteristics are removed it easily by drying, also cause volatilizing loss simultaneously easily.Carrene can hydrolysis produce hydrogen chloride in addition, causes the corrosion to equipment.Therefore in practical operation, need to keep a close eye on the anticorrosion of the volatilization that suppresses carrene and equipment.
Mention extraction drying process in the Chinese patent 02160744.3 of people such as Liu Zhaofeng application with the super high molecular weight gel spun fiber of weight average molecular weight 100～3,000,000, solvent is that the gel fiber of paraffin oil forms gel spun fiber after quenching, at room temperature carry out earlier 2～10 times predraft, under tensioning state, carry out ultrasonic extraction (promptly extraction system being applied ultrasonic wave) then, be lower than drying under 40 ℃ of temperature with carrene or dimethylbenzene.Front cover layer water on carrene.But do not relate to extraction temperature in this patent.And concrete numerical value requirement is not proposed yet for water seal.
Summary of the invention
The objective of the invention is to propose the drying means of extractant in a kind of preparation process of ultrahigh molecular weight polyethylene fiber, the employing carrene is an extractant, can make dry temperature lower, to save the energy of heat drying gas, reduces cost.And adopt the mode that progressively heats up, make dry run comparatively mild, make the internal structure of fiber comparatively even, avoid the generation of the icing phenomenon of moisture simultaneously.Before advancing drying, aspirate a part of carrene, reduce the load of dry workshop section by vacuum plant.
Characteristics of the present invention and effect:
Adopting carrene in the extraction process of superhigh molecular weight polyethylene fibers preparation among the present invention is extractant.
The present invention is in order to prevent that carrene from the too fast vaporization in vicinity of drying inlet, causing hydrogenesis.Also in order to make whole dry run evenly mild, drying equipment is divided into from low to high different temperatures zone, adopt divisional air admission, the dry gas temperature that initial segment is sent into is lower, then raises successively.This mode guarantees that rate of drying does not have too big variation in whole dry run, thereby makes dry run comparatively mild.Make the internal structure of fiber comparatively even, avoid the generation of the icing phenomenon of moisture simultaneously.The air inlet of every district has independent heat exchanger and by-pass valve control, with the temperature and the tolerance of control air inlet.For further improving drying effect, also can adopt the mode of multilevel drying, make whole dry run more evenly mild.
Because carrene is volatile, saturated vapor pressure is bigger, is being lower than under the temperature of boiling point and can volatilizing fast.Therefore dry temperature can be lower, is used for the energy of heat drying gas with saving, reduces cost.In addition, rate of drying is too fast, because the low boiling and the effumability of extractant, be removed very soon, can cause vertical generation of gel fiber (as-spun fibre) sharply to be shunk, the fibre structure of formation is inhomogeneous, but make the drawdown of fiber poor, be unfavorable for hot draft process thereafter, cause the multiple of hot drawing-off to reduce, finally influence the fiber number and the intensity of finished product.Therefore dry temperature is unsuitable too high, and speed is unsuitable too fast.According to inventor's practice, baking temperature is advisable to be no more than 35 ℃.Baking temperature is low, and dry run is comparatively mild, and the fibre structure of formation is comparatively even, if but rate of drying is slow excessively, and the corresponding decline of the production capacity of equipment is so baking temperature should not be low excessively.According to inventor's practice, dry preference temperature is 10～35 ℃, particularly 15～30 ℃.Dry gas can adopt air, nitrogen, carbon dioxide or other inert gas.The heating of gas can be adopted Steam Heating, heat-conducting oil heating, electrical heating or alternate manner heating.If when the temperature of dry gas source gas is higher than the temperature of process conditions requirement, can adopt cooling water temperature.
The present invention adds water in extraction equipment, help reducing the volatilization of carrene.The density of water is less than carrene, and the solubility of carrene in water is lower, can form one deck water seal at liquid surface.Because the effect of water seal, carrene significantly reduces with the chance that air directly contacts, and has reduced the volatilization of carrene, has reduced the loss of carrene.The thickness of water seal should not be thin excessively, otherwise because the fluctuation of liquid level may cause carrene directly to contact with air.
Though water seal can reduce the volatilization of carrene, because water seal is positioned at the liquid level top, fiber leaves extraction workshop section, can be in the subsidiary small amount of moisture of fiber surface.Fiber has just entered drying box, because the effect of dry gas, carrene volatilizees rapidly, takes away a large amount of heats, makes local temperature low excessively, causes hydrogenesis Cheng Bing, influences the proper motion of fiber.For preventing hydrogenesis, after fiber leaves extraction workshop section, adopt vacuum plant, siphon away part moisture and carrene attached to fiber surface.The employing of vacuum plant not only can reduce the possibility of hydrogenesis, and owing to siphoned away part methylene chloride, reduce the load of drying equipment.
Description of drawings
Fig. 1 is process equipment and total preparation process flow chart of a kind of superhigh molecular weight polyethylene fibers of employing the inventive method.Do not leave standstill the process that is separated after the gel fiber moulding.
Fig. 2 is process equipment and total preparation process flow chart of the another kind of superhigh molecular weight polyethylene fibers of employing the inventive method.Leave standstill the process that is separated after the gel fiber moulding.In the process that leaves standstill, the paraffin oil in the fiber has part and separates out, and phenomenon of phase separation occurs.The partial solvent paraffin oil is separated out, and has reduced the oil content of fiber, reduced the load of extraction workshop section, but technology is than the complex process of Fig. 1.
Fig. 3 is a dry workshop section of the present invention Gas Recovery process chart.
Fig. 4 is the process flow diagram of a drying box of the present invention.
The specific embodiment
The inventive method reaches embodiment in conjunction with the accompanying drawings and is described in detail as follows:
In the preparation process of ultrahigh molecular weight polyethylene fiber that the present invention proposes is the drying means of extractant with the carrene.
The process equipment of a kind of superhigh molecular weight polyethylene fibers of employing the inventive method and total preparation process flow process are as shown in Figure 1, whole technical process comprises: solid material such as ultra-high molecular weight polyethylene powder and auxiliary agent and the solvent solution 1 after evenly adds in the screw extruder 3 (screw extruder is driven by motor 2), through the measuring pump metering, through spinning manifold 4, by spinnerets ejection, enter and solidify tank 5 and solidify.Drive effluent trough through godet roller 6 grades, pass through preliminary draft machine 7 then, enter extraction equipment 8 extractions.After extraction process was finished, fiber entered drying box 9 and carries out drying.Then carry out multistage hot drawing-off 10, coiling and molding on up-coiler 11 is packaged into finished product at last.Do not leave standstill the process that is separated in this technology after the gel fiber moulding.
Adopt the process equipment of another kind of superhigh molecular weight polyethylene fibers of the present invention and total preparation process flow process as shown in Figure 2, with the difference of the technical process described in Fig. 1 be that this technology leaves standstill, phase separation.Solid material such as ultra-high molecular weight polyethylene powder and auxiliary agent and the solvent solution 101 after evenly adds in the screw extruders 103 (screw extruder is driven by motor 102), the measuring pump metering, through spinning manifold 104,, enter and solidify tank 105 and solidify by spinnerets ejection.Drive effluent trough through godet roller 106 grades, fall into then and put a dolly 107 or 108.Gel fiber leaves standstill, is separated in dolly 107 or 108, passes through preliminary draft machine 109 then, enters extraction equipment 110 extractions.After extraction process was finished, fiber entered drying box 111 and carries out drying.After the oven dry, carry out multistage hot drawing-off 112, coiling and molding on up-coiler 113 is packaged into finished product at last.
Fig. 3 is the Gas Recovery process chart of dry workshop section of the present invention.The gas that contains carrene that dry workshop section 201 comes out after compressor 203 pressurizations, enters condenser 205 coolings, and the liquid carrene 204 that condensation goes out recycles.The tail gas 206 that contains carrene enters in adsorbing separation or the membrane separation device 208 and carries out isolation of purified.The liquid carrene of separating 207 can recycle.209 emptying of a purified gas part, another part 210 and the live gas 211 that replenishes are transferred to through heat exchanger 212 and are entered back tender section 201 after the temperature of arts demand and recycle.In the actual use, also can not add compressor 203 and condenser 205, directly enter in adsorbing separation or the membrane separation device 208 and carry out isolation of purified.
Fig. 4 is a process flow diagram that the drying box of four subregions is arranged of the present invention.The fiber 302 that goes out extraction enters in the drying box 301 from the left side, and before entering drying box, through a vacuum suction apparatus 311, this device links to each other with vavuum pump 312, and the material 313 of sucking-off enters recovery system.Drying box is divided into four districts, and four admission lines 303,304,305 and 306 are arranged respectively, and attemperating unit and heat exchanger, valve and volume control device are arranged on the admission line, and other has four outlet pipes 307,308,309,310.314 are used for heating or the cool drying air inlet makes it to reach the temperature of technological requirement, 315 valves for the control flow for heat exchanger.
The embodiment of the extraction drying of superhigh molecular weight polyethylene fibers of the present invention is respectively described below:
Embodiment 1
With the polyethylene powders of relative molecular weight 5,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, extrusion molding.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 5 centimetres.Fiber aspirates out the liquid of part attached to fiber surface through a vacuum suction apparatus.Enter then and carry out dried in the drying box, dry be one-level drying (promptly adopting a drying box), drying box is divided into four districts as shown in Figure 4, is respectively 20 ℃, 22 ℃, 30 ℃, 35 ℃ by the temperature of the direction of charging.Dry gas is an air.Each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.Dry waste gas is through condensation, isolating the liquid carrene of a part recycles, tail gas enters membrane separation device isolate a part of carrene again after, residual exhaust enters adsorption separation device and isolates remaining carrene, purified gas replenishes to enter in the drying box behind the part fresh air and recycles.Dried fiber is wound into finished product after overheated drawing-off.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 2
Polyethylene powders and auxiliary agent, three kinds of materials of solvent paraffin oil of relative molecular weight 4,000,000 are entered screw extruder after fully mixing dissolving.Enter spinning manifold then,, be extruded into silk through spinnerets.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 15 centimetres.Fiber aspirates out the liquid of part attached to fiber surface through a vacuum suction apparatus.Enter then and carry out dried in the drying box.Drying is a secondary drying, and every grade of drying box is divided into four districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.First order temperature is respectively 15 ℃, 17 ℃, 19 ℃, 21 ℃, and second level temperature is respectively 22 ℃, 23 ℃, 24 ℃ and 25 ℃.Dry gas is an air.Dried fiber is wound into finished product after overheated drawing-off.Dry waste gas is through condensation, and adsorbing separation recycles after purifying.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 3
With the polyethylene powders of relative molecular weight 5,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, be extruded into silk.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 35 centimetres.Fiber enters and carries out dried in the drying box, and drying is a secondary drying, and every grade of drying box is divided into four districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.First order temperature temperature is respectively 15 ℃, 17 ℃, 21 ℃, 25 ℃, and second level temperature is respectively 26 ℃, 30 ℃, 30 ℃ and 30 ℃.Dry gas is an air.Dried fiber is wound into finished product after overheated drawing-off.
After dry waste gas purifies through adsorbing separation, replenish to enter in the drying box behind the part fresh air and recycle.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 4
With the polyethylene powders of relative molecular weight 5,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, be extruded into silk.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 45 centimetres.Fiber aspirates out the liquid of part attached to fiber surface through a vacuum suction apparatus.Enter and carry out dried in the drying box, drying is the one-level drying, and drying box is divided into four districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.Temperature is respectively 20 ℃, 22 ℃, 30 ℃, 35 ℃.Dry gas is a nitrogen.Dried fiber is wound into finished product after overheated drawing-off.
Dry waste gas through the film isolation of purified after, replenish to enter in the drying box behind the fresh nitrogen of part and recycle.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 5
With the polyethylene powders of relative molecular weight 5,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, be extruded into silk.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 50 centimetres.Fiber enters then and carries out dried in the drying box, and drying is a three-stage drying, and every grade of drying box is divided into two districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.Also be provided with cooling water heat exchanger on each admission line, adopt cooling water to reduce intake air temperature during summer and make it reach the temperature of technological requirement.Every grade of temperature is respectively 15 ℃, 17 ℃ and 23 ℃, 25 ℃, and 26 ℃, 30 ℃.Dry gas is a carbon dioxide.Dried fiber is wound into finished product after overheated drawing-off.
After dry waste gas is isolated carrene through adsorbing separation, enter in the drying box after the gas make-up part fresh carbon dioxide of purification and recycle.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 6
With the polyethylene powders of relative molecular weight 5,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, be extruded into silk.Through solidifying the tank cooling, form gel fiber.Gel fiber places to be put a dolly and leaves standstill and entered extraction tank in 15 hours later on, adopts dichloromethane extraction, and the thickness of water seal is 5 centimetres.Fiber enters then and carries out dried in the drying box, and drying is the level Four drying, and every grade of drying box is divided into two districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.Temperature is respectively 15 ℃, 17 ℃ and 23 ℃, 25 ℃, and 26 ℃, 28 ℃ and 30 ℃, 30 ℃.Dry gas is a carbon dioxide.Dried fiber is wound into finished product after overheated drawing-off.
Dry waste gas is through condensation, behind the film isolation of purified, replenishes to enter in the drying box after the part fresh carbon dioxide and recycles.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Embodiment 7
With the polyethylene powders of relative molecular weight 4,000,000 and auxiliary agent, solvent paraffin oil after fully mixing dissolving by screw extruder through spinnerets, be extruded into silk.Through solidifying the tank cooling, form gelatinous fibre, adopt dichloromethane extraction, the thickness of water seal is 10 centimetres.Fiber enters then and carries out dried in the drying box, and drying is the one-level drying, and drying box is divided into six districts, and each district is provided with air inlet and gas outlet respectively, is provided with attemperating unit and heat exchanger, valve and volume control device on each admission line.Also be provided with cooling water heat exchanger on each admission line, adopt cooling water to reduce intake air temperature during summer and make it reach the temperature of technological requirement.Each distinguishes temperature is respectively 10 ℃, 12 ℃, 15 ℃, 20 ℃, 21 ℃, 21 ℃.Dry gas is an air.Dried fiber is wound into finished product after overheated drawing-off.
Dry waste gas is isolated the liquid carrene of a part and is recycled through condensation, and residual exhaust enters adsorption separation device and isolates remaining carrene, and purified gas replenishes to enter in the drying box behind the part fresh air and recycles.
Finally make the superhigh molecular weight polyethylene fibers of high strength and modulus.The intensity of fiber reaches more than the 25cN/dtex, and modulus reaches more than the 960cN/dtex.
Claims (10)
1, the drying means of the extractant in a kind of preparation process of ultrahigh molecular weight polyethylene fiber, described preparation process of ultrahigh molecular weight polyethylene fiber mainly comprises: ultra-high molecular weight polyethylene powder and auxiliary agent, solvent are through after mixing, fully dissolving, extrude coagulation forming, in extraction process, remove then and desolvate, remove extractant by drying process, through overheated drawing-off, form the superhigh molecular weight polyethylene fibers final products again; It is characterized in that: use carrene to be extractant in the described extraction process, and adopt the mode that progressively heats up, drying equipment is divided into from low to high two of temperature, temperature province more than three or four by the direction of charging.
2, according to the described drying means of claim 1, it is characterized in that: described drying equipment adopts subregion to carry dry gas, forms the different temperatures zone, and each district's air inlet is by the temperature and the tolerance of independent heat exchanger and by-pass valve control control air inlet.
3, according to the described drying means of claim 2, it is characterized in that: adopt air, nitrogen, perhaps carbon dioxide is a kind of as dry gas.
4, according to the described drying means of claim 3, it is characterized in that: described dry gas temperature range is 10～35 ℃.
5, according to claim 1,2,3 or 4 described drying meanss, it is characterized in that: described drying equipment adopts one-level, secondary or drying equipment more than three grades.
6, according to claim 1,2,3 or 4 described drying meanss, it is characterized in that: in extraction equipment, add water, form one deck water seal on the extract surface, and the thickness of water seal is 1～50 centimetre.
7, according to claim 3 or 4 described drying meanss, it is characterized in that: also comprise the gas that contains carrene with dried,, isolate the gas behind the carrene, return dry workshop section and recycle by gas concentration unit.
8, according to the described drying means of claim 7, it is characterized in that: Gas recovering method is condensation, adsorbing separation, membrane separation process, perhaps the wherein combination of two kinds or three kinds methods.
9, drying means according to claim 1 is characterized in that: fiber enters drying process before by a vacuum plant after leaving extraction, siphon away the partially liq of fiber surface.
10, drying means according to claim 3 is characterized in that: dry gas makes it reach the temperature that process conditions require by cooling water temperature before entering drying equipment.
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| CN101984155A (en) * | 2010-10-11 | 2011-03-09 | 浙江千禧龙特种纤维有限公司 | Method for drying ultra-high molecular weight polyethylene fibers |
| CN101982576B (en) * | 2010-10-15 | 2012-04-25 | 安徽皖维高新材料股份有限公司 | Hot air drying method of PVA fibers and drying ovens |
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| CN103388186A (en) * | 2012-05-09 | 2013-11-13 | 邵阳纺织机械有限责任公司 | Tow drying device |
| CN106978654B (en) * | 2017-04-01 | 2019-06-18 | 浙江千禧龙纤特种纤维股份有限公司 | The solidification method for shaping of gel fiber in ultra high molecular weight polyethylene fiber production process |
| CN111013338A (en) * | 2019-03-11 | 2020-04-17 | 北京诺维新材科技有限公司 | Drying method of halogenated hydrocarbon |
| CN109943900A (en) * | 2019-03-28 | 2019-06-28 | 浙江千禧龙纤特种纤维股份有限公司 | A kind of high-tenacity polyethylene fibre gel spinning system preprocess method |
| CN111254523A (en) * | 2020-03-09 | 2020-06-09 | 江苏九九久科技有限公司 | Extraction method for fiber production |
| CN112708950B (en) * | 2020-12-08 | 2021-12-21 | 中国纺织科学研究院有限公司 | Fiber gas drying device and fiber gas drying method |
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