CN105951202B - Polyethylene fibre, preparation method, preparation facilities and purposes - Google Patents
Polyethylene fibre, preparation method, preparation facilities and purposes Download PDFInfo
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- CN105951202B CN105951202B CN201610331010.2A CN201610331010A CN105951202B CN 105951202 B CN105951202 B CN 105951202B CN 201610331010 A CN201610331010 A CN 201610331010A CN 105951202 B CN105951202 B CN 105951202B
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- -1 Polyethylene Polymers 0.000 title claims abstract description 91
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 89
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 89
- 239000000835 fiber Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000004321 preservation Methods 0.000 claims abstract description 37
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000004804 winding Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 230000004888 barrier function Effects 0.000 claims abstract 4
- 239000011435 rock Substances 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 33
- 238000009987 spinning Methods 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 25
- 238000004898 kneading Methods 0.000 claims description 19
- 239000000499 gel Substances 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- 230000003078 antioxidant effect Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 230000004224 protection Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 235000015110 jellies Nutrition 0.000 claims description 3
- 239000008274 jelly Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims 2
- 230000001681 protective effect Effects 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 125000004855 decalinyl group Chemical group C1(CCCC2CCCCC12)* 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 1
- 235000006708 antioxidants Nutrition 0.000 description 12
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 9
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 9
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000007863 gel particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007614 solvation Methods 0.000 description 2
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RPWFJAMTCNSJKK-UHFFFAOYSA-N Dodecyl gallate Chemical compound CCCCCCCCCCCCOC(=O)C1=CC(O)=C(O)C(O)=C1 RPWFJAMTCNSJKK-UHFFFAOYSA-N 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 229930003427 Vitamin E Natural products 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 235000010386 dodecyl gallate Nutrition 0.000 description 1
- 239000000555 dodecyl gallate Substances 0.000 description 1
- 229940080643 dodecyl gallate Drugs 0.000 description 1
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
- 229940046009 vitamin E Drugs 0.000 description 1
- 239000011709 vitamin E Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
- D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1096—Rope or cable structures braided
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/201—Polyolefins
- D07B2205/2014—High performance polyolefins, e.g. Dyneema or Spectra
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2007—Elevators
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a kind of polyethylene fibre, preparation method, preparation facilities and purposes belong to textile technology field.The fiber is made of the raw material that polyethylene and decahydronaphthalene form.This method will be mixed by polyethylene and decahydronaphthalene solvent；Pass through double screw extruder；By calm heat preservation zone after the ejection of the spinneret orifice of spinneret；It is cooled and solidified by cooling zone；Around in the first active drawing-off roller group；Successively through superheated header, the second active drawing-off roller group, oiling device, winding device；It is finally handled by hot-stretch, obtains the fiber.The device includes container, double screw extruder, spinneret, calm heat preservation zone, cooling zone, the first active drawing-off roller group, hot tank, the second active drawing-off roller group, oiling device, winding device and hot-stretch device.Fibre strength >=the 45cN/dtex made from this method and device, modulus >=2000cN/dtex, strip dry CV value≤2% can be used in elevator hawser perhaps landslide protective net or mud-rock flow barrier net or soil barrier.
Description
Technical Field
The invention relates to the technical field of spinning, in particular to a polyethylene fiber, a preparation method, a preparation device and application thereof.
Background
The high-performance polyethylene fiber, carbon fiber and aramid fiber are called as three high-performance fibers, has many excellent performances such as high strength, high modulus, low density, chemical stability, ultraviolet resistance, friction resistance, low temperature resistance, easy transmission of electric waves and the like, is an important new material for promoting the development of high and new technology industries in China, is a necessary material for national defense fields such as aviation, aerospace, navigation and the like, and is widely applied to the civil field.
At present, the high-performance polyethylene fiber is produced by adopting a 'jelly spinning' method, and due to the high molecular weight of the ultra-high molecular weight polyethylene, the ultra-high molecular weight polyethylene is difficult to select a proper solvent for quick dissolution. In production, a double-screw extruder is adopted to solve the problem of difficult dissolution of the ultra-high molecular weight polyethylene. Selecting polyethylene resin with molecular weight more than 100 ten thousand, mixing with white oil, paraffin oil, decalin or other organic solvent according to mass percent of 4-10%, and injecting into a double-screw extruder. The dissolving process has low efficiency, uses more organic solvents, is not thorough in dissolving, is easy to generate gel particles, causes large pressure fluctuation of the assembly, and is not beneficial to forming uniform spinning solution.
Disclosure of Invention
In view of the above, the invention provides a polyethylene fiber, a preparation method, a preparation device and an application thereof, the fiber strength prepared by the method and the device is more than or equal to 45cN/dtex, the modulus is more than or equal to 2000cN/dtex, the evenness CV value is less than or equal to 2%, and the polyethylene fiber can be used as a lifting elevator cable, or a mountain landslide protection net, or a mud-stone flow resistance separation net or a mud blocking net, thereby being more practical.
In order to achieve the first object, the invention provides a polyethylene fiber, comprising:
the polyethylene fiber provided by the invention is prepared from polyethylene and decalin according to the mass ratio of (2: 8) - (5: 5), wherein the molecular weight of the polyethylene is more than or equal to 6 x 106；
The strength of the polyethylene fiber is more than or equal to 45cN/dtex, the modulus is more than or equal to 2000cN/dtex, and the yarn levelness CV value is less than or equal to 2%.
In order to achieve the second object, the technical scheme of the preparation method of the polyethylene fiber provided by the invention is as follows:
the preparation method of the polyethylene fiber provided by the invention comprises the following steps:
the polyethylene and the decalin are mixed according to the mass ratio of (2: 8) - (5: 5) to form a mixture, wherein the molecular weight of the polyethylene is more than or equal to 6 x 106；
After the mixture passes through a double-screw extruder, the molecular weight of polyethylene in the mixture is reduced by 30-50 percent to form a spinning solution;
the spinning solution is sprayed out from a spinneret orifice of a spinneret plate and then passes through a windless heat preservation area to obtain a spinning trickle;
cooling and solidifying the spinning trickle in a cooling area to obtain gel yarns;
winding the gel silk onto a first active drafting roller set to obtain the gel silk subjected to primary drafting;
the jelly glue yarn subjected to primary drawing sequentially passes through a hot box, a second active drawing roller set, an oiling device and a winding device to obtain a wound tow;
and carrying out hot stretching treatment on the wound tows to obtain the polyethylene fibers.
The technical scheme of the preparation method of the polyethylene fiber provided by the invention can be further realized by adopting the following technical measures.
Preferably, the material temperature of the feeding port of the double-screw extruder ranges from 80 ℃ to 110 ℃, and the material temperature of the discharge port of the double-screw extruder ranges from 170 ℃ to 210 ℃.
Preferably, the twin screws of the twin-screw extruder are co-rotating twin screws, and the proportion of the kneading elements of the twin-screw extruder is 40-90%.
Preferably, the diameter of the kneading element is not less than 30mm, and the length-diameter ratio of the double-screw cylinder of the double-screw extruder is in the range of (30: 1) to (200: 1).
As a preference, the first and second liquid crystal compositions are,
the length of the airless heat preservation area ranges from 20mm to 500mm,
the airless heat preservation area is connected with the plate surface of the spinneret plate in a seamless way,
the non-wind heat preservation area is a stable area without external air field interference,
the temperature in the airless heat preservation area is 5 ℃ higher than that of the materials in the spinneret plate.
As a preference, the first and second liquid crystal compositions are,
the length of the cooling zone ranges from 500mm to 1000mm,
the speed of the spinning trickle passing through the cooling zone is more than or equal to 10m/min,
introducing CO into the cooling zone2、N2One or more of rare gases,
the temperature in the cooling area ranges from 20 ℃ to 50 ℃;
the value range of the wind speed in the cooling area is 0.1-2 m/s.
Preferably, the form of the air blown in the cooling zone is selected from,
one side blows air, and the other side sucks air; or,
blowing air around and sucking air from bottom.
As a preference, the first and second liquid crystal compositions are,
the first active draft roll group comprises at least 2 rolls,
the rollers in the first active draft roller group have the same speed,
the distance between the filament inlet point of the first active drawing roller group and the spinneret orifice of the spinneret plate ranges from 520mm to 1500 mm.
Preferably, the first active draft roller set and the hot box are in the same vertical straight line direction, or an included angle of 90 degrees is formed between the active draft roller set and the hot box.
As a preference, the first and second liquid crystal compositions are,
the temperature in the hot box ranges from 100 ℃ to 140 ℃,
introducing CO into the hot box2、N2One or more of rare gas and water vapor.
Preferably, steam is introduced into the hot box.
Preferably, the hot box is a pressure vessel, and the pressure resistance of the pressure vessel is more than or equal to 4.0 MPa.
Preferably, the rotation speed ratio of the second active drawing roller group to the first active drawing roller group is in a range of (2: 1) to (7: 1).
Preferably, the oil applied to the tow blanket during the oiling process is an antioxidant-containing oil.
Preferably, the finish is a conventional spin finish, and the antioxidant is dispersible in the finish.
In order to achieve the third object, the invention provides a device for preparing polyethylene fibers, comprising:
the preparation device of the polyethylene fiber provided by the invention comprises a container, a double-screw extruder, a spinneret plate, a windless heat preservation area, a cooling area, a first active drawing roller set, a hot box, a second active drawing roller set, an oiling device, a winding device and a hot stretching device,
mixing a mixture consisting of polyethylene and decalin according to a mass ratio of (2: 8) - (5: 5) in the container, sequentially passing through the double-screw extruder, the spinneret plate, the seamless heat preservation area, the cooling area, the first active drafting roller set, the hot box, the second active drafting roller set, the oiling device, the winding device and the hot stretching device to obtain the polyethylene fiber,
wherein the molecular weight of the polyethylene in the mixture is more than or equal to 6 multiplied by 106,
After passing through the double-screw extruder, the molecular weight of polyethylene in the mixture is reduced by 30-50 percent to form a spinning solution.
The technical scheme of the preparation device of the polyethylene fiber provided by the invention can be further realized by adopting the following technical measures.
Preferably, the material temperature of the feeding port of the double-screw extruder ranges from 80 ℃ to 110 ℃, and the material temperature of the discharge port of the double-screw extruder ranges from 170 ℃ to 210 ℃.
Preferably, the twin screws of the twin-screw extruder are co-rotating twin screws, and the proportion of the kneading elements of the twin-screw extruder is 40-90%.
Preferably, the diameter of the kneading element is not less than 30mm, and the length-diameter ratio of the double-screw cylinder of the double-screw extruder is in the range of (30: 1) to (200: 1).
As a preference, the first and second liquid crystal compositions are,
the length of the airless heat preservation area ranges from 20mm to 500mm,
the airless heat preservation area is connected with the plate surface of the spinneret plate in a seamless way,
the non-wind heat preservation area is a stable area without external air field interference,
the temperature in the airless heat preservation area is 5 ℃ higher than that of the materials in the spinneret plate.
As a preference, the first and second liquid crystal compositions are,
the length of the cooling zone ranges from 500mm to 1000mm,
the speed of the spinning trickle passing through the cooling zone is more than or equal to 10m/min,
introducing CO into the cooling zone2、N2One or more of rare gases,
the temperature in the cooling area ranges from 20 ℃ to 50 ℃;
the value range of the wind speed in the cooling area is 0.1-2 m/s.
Preferably, the form of the air blown in the cooling zone is selected from,
one side blows air, and the other side sucks air; or,
blowing air around and sucking air from bottom.
As a preference, the first and second liquid crystal compositions are,
the first active draft roll group comprises at least 2 rolls,
the rollers in the first active draft roller group have the same speed,
the distance between the filament inlet point of the first active drawing roller group and the spinneret orifice of the spinneret plate ranges from 520mm to 1500 mm.
Preferably, the first active draft roller set and the hot box are in the same vertical straight line direction, or an included angle of 90 degrees is formed between the active draft roller set and the hot box.
As a preference, the first and second liquid crystal compositions are,
the temperature in the hot box ranges from 100 ℃ to 140 ℃,
introducing CO into the hot box2、N2One or more of rare gas and water vapor.
Preferably, steam is introduced into the hot box.
Preferably, the hot box is a pressure vessel, and the pressure resistance of the pressure vessel is more than or equal to 4.0 MPa.
Preferably, the rotation speed ratio of the second active drawing roller group to the first active drawing roller group is in a range of (2: 1) to (7: 1).
Preferably, the oil applied to the tow blanket during the oiling process is an antioxidant-containing oil.
Preferably, the finish is a conventional spin finish, and the antioxidant is dispersible in the finish.
The invention also provides application of the polyethylene fiber prepared by the method and the device provided by the invention as a lifting elevator cable, or a mountain landslide protection net, or a mud-stone flow resistance separation net or a mud blocking net.
The preparation method of the polyethylene fiber provided by the invention mixes polyethylene and decalin solvent; passing through a twin screw extruder; the hot air passes through the airless heat preservation area after being sprayed out of a spinneret orifice of the spinneret plate; cooling and solidifying through a cooling area; winding the yarn onto a first active drawing roller set; sequentially passing through a hot box, a second active drawing roller set, an oiling device and a winding device; finally, the fiber is obtained through hot stretching treatment.
The preparation device of the polyethylene fiber provided by the invention comprises a container, a double-screw extruder, a spinneret plate, a windless heat preservation area, a cooling area, a first active drawing roller set, a hot box, a second active drawing roller set, an oiling device, a winding device and a hot stretching device.
The method and the device can avoid the shaking of the spinning solution in the drying process by applying the airless heat preservation area, so that the obtained polyethylene fiber has better uniformity and higher performance.
On the basis of not adding an antioxidant and any other auxiliary agent, the fiber prepared from polyethylene and decahydronaphthalene according to the mass ratio of (2: 8) - (5: 5) has the fiber strength of more than or equal to 45cN/dtex, the modulus of more than or equal to 2000cN/dtex, and the yarn levelness CV value of less than or equal to 2 percent, and can be used for lifting elevator cables, or mountain landslide protective nets, or mud stone flow resistance separation nets or mud blocking nets.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of the steps of a method for making polyethylene fibers according to the present invention;
FIG. 2 is a schematic view of a first spatial arrangement of an apparatus for preparing polyethylene fibers according to the present invention;
fig. 3 is a schematic view of a second spatial arrangement of the apparatus for preparing polyethylene fibers according to the present invention.
Detailed Description
The invention provides a polyethylene fiber, a preparation method, a preparation device and application thereof, aiming at solving the problems in the prior art, the fiber prepared by the method and the device has the strength of more than or equal to 45cN/dtex, the modulus of more than or equal to 2000cN/dtex, and the evenness CV value of less than or equal to 2 percent, can be used for a lifting elevator cable, or a mountain landslide protective net, or a mud stone flow resistance separation net or a mud blocking net, and is more practical.
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on the polyethylene fiber, its preparation method, preparation device and its use, and its specific embodiments, structures, characteristics and effects thereof according to the present invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
The polyethylene fiber provided by the invention is prepared from polyethylene and decalin according to the mass ratio of (2: 8) - (5: 5), wherein the molecular weight of the polyethylene is more than or equal to 6 multiplied by 106；
The strength of the polyethylene fiber is more than or equal to 45cN/dtex, the modulus is more than or equal to 2000cN/dtex, and the yarn levelness CV value is less than or equal to 2%.
Referring to fig. 1, the preparation method of the polyethylene fiber provided by the invention comprises the following steps:
step S1: mixing polyethylene and decalin according to the mass ratio of (2: 8) - (5: 5) to form a mixture, wherein the molecular weight of the polyethylene is more than or equal to 6 x 106；
Step S2: after the mixture passes through a double-screw extruder, the molecular weight of polyethylene in the mixture is reduced by 30-50 percent to form a spinning solution;
step S3: the spinning solution is sprayed out from a spinneret orifice of a spinneret plate and then passes through a windless heat preservation area to obtain spinning trickle;
step S4: cooling and solidifying the spinning trickle in a cooling area to obtain gel yarns;
step S5: winding the gel silk onto a first active drafting roller set to obtain the gel silk subjected to primary drafting;
step S6: the gel silk after primary drawing sequentially passes through a hot box, a second active drawing roller set, an oiling device and a winding device to obtain a wound silk bundle;
step S7: and carrying out hot stretching treatment on the wound tows to obtain the polyethylene fibers.
Wherein the material temperature of the feeding port of the double-screw extruder ranges from 80 ℃ to 110 ℃, and the material temperature of the discharge port of the double-screw extruder ranges from 170 ℃ to 210 ℃. Researches show that the feeding temperature of the twin-screw cannot be too high so as to avoid the phenomenon of 'half-cooked' caused by dissolution of the materials without full solvation at the feeding port. The temperature of the discharge port is the final state temperature of the material, and the proper degradation and thorough dissolution of the ultra-high molecular weight polyethylene can be ensured by matching with the parameters such as the diameter, the length-diameter ratio and the like of the double screws within the temperature range of 170 plus 210 ℃, and the fluidity and the uniformity are better.
Wherein, the twin-screw of the twin-screw extruder is a co-rotating twin-screw, and the value range of the proportion of the kneading elements of the twin-screw extruder is 40-90%. Guarantee sufficient kneading element, can effectively increase the twin-screw and dissolve the effect, effectively degrade ultra high molecular weight polyethylene, avoid the production of gel particle, better provide the mobility and the homogeneity of material.
Wherein the diameter of the kneading element is more than or equal to 30mm, and the length-diameter ratio of the double-screw barrel of the double-screw extruder is in the range of (30: 1) to (200: 1). The kneading element has a certain diameter, can ensure that the kneading element does not distort and has stronger conveying capacity under the action of high-viscosity materials, simultaneously requires the double-screw cylinder to be long enough, increases the quantity of the kneading element and improves the kneading action time of the materials, improves the retention time of the materials in the double-screw cylinder, ensures that the ultrahigh molecular weight polyethylene can be degraded moderately, is not less than 30 percent but not more than 50 percent, and can be dissolved completely.
The length of the airless heat preservation area ranges from 20mm to 500mm, the airless heat preservation area is in seamless connection with the surface of the spinneret plate, the airless heat preservation area is a stable area without external air field interference, and the temperature inside the airless heat preservation area is 5 ℃ higher than that of materials in the spinneret plate. The windless heat preservation area is stable without external air field interference, and the turbulence of the spinning trickle is prevented from being disturbed, so that the turbulence is prevented, and the uniformity is not influenced. The temperature in the heat preservation district can play the effect to the face heat preservation, can let the spinning trickle of extruding from the spinneret orifice simultaneously can maintain the high temperature state at the in-process that steps down in the twinkling of an eye, realizes the purpose that the spinning unwrapps and prevents back and twine, is favorable to evenly realizing that the high power shower nozzle is tensile.
Wherein the length of the cooling zone ranges from 500mm to 1000mm, the speed of the spinning trickle passing through the cooling zone is more than or equal to 10m/min, and CO is introduced into the cooling zone2、N2One or more gases in rare gases, wherein the value range of the temperature in the cooling area is 20-50 ℃, so that the cooling solidification of the material can be rapidly realized; the value range of the wind speed in the cooling area is 0.1-2 m/s. Thereby guarantee that the material can cool off the solidification fast and form the gel silk.
Wherein, the blowing form in the cooling area is selected from one side blowing and the other side air suction; or, the air is blown around and sucked at the bottom.
The first active drafting roller group at least comprises 2 rollers, the rollers in the first active drafting roller group have the same speed, and the distance between the filament inlet point of the first active drafting roller group and the spinneret orifice of the spinneret plate ranges from 520mm to 1500 mm.
Wherein the first active draft roller set and the hot box are in the same vertical linear direction, as shown in fig. 2; alternatively, the active draft roller set and the hot box are at a 90 ° angle, as shown in fig. 3. The method is favorable for reducing the height of a factory building, can be designed according to the needs, and has no influence on the final performance of the fiber.
Wherein the temperature in the hot box ranges from 100 ℃ to 140 ℃, and the pre-drawing drying of the gel filaments and the volatilization of the decalin vapor are facilitated under the temperature condition; introducing CO into the hot box2、N2One or more of rare gas and water vapor, thereby avoiding the chemical reaction of the gas introduced into the hot box with the raw materials and the intermediate products.
Wherein, steam is introduced into the hot box. The gel silk is heated and fumigated by water vapor, and can be heated, desolventized and pre-drawn. At this time, the hot box is a pressure vessel, and the pressure resistance of the pressure vessel is more than or equal to 4.0 MPa.
Wherein, the value range of the rotating speed ratio of the second active drafting roller group to the first active drafting roller group is (2: 1) - (7: 1). Wherein the roller number of the first active drafting roller group and the roller number of the second active drafting roller group can be both 5,
the number of rollers in the drawing roller group is at least 2 rollers, but not more than 7, preferably 5 rollers. The tow drafting and conveying are realized by friction between the tow and the surfaces of the rollers, if the number of the rollers is small, the friction is insufficient, the tow is easy to slip, and the fiber unevenness is high. If the number of the rollers is large, the friction force of the roller surface on the tows is large, secondary damage is caused to the tows, meanwhile, the number of the rollers is large, the size of the drafting roller group is large, the floor area and the investment cost of a workshop are increased, and industrialization is not facilitated.
Wherein, when passing through the oiling device, the oil on the tow blanket is an oil agent containing an antioxidant.
The antioxidant is common antioxidants such as phosphite esters and phenols, and is selected from tris (2, 4-di-tert-butyl phenyl) phosphite (antioxidant 168), tris (2, 4-di-tert-butyl) phenyl phosphite β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester (Ciba Irganox 1076), tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), dodecyl gallate, vitamin E, etc.
Wherein the oil is conventional spinning oil, and the antioxidant can be dispersed in the oil.
In the embodiment, the oil agent is a mineral mixture containing an antistatic agent, and TERON E2051, 2056, 6551 and the like from Japan Sonchi.
Referring to fig. 2 and 3, the apparatus for manufacturing polyethylene fiber according to the present invention comprises a vessel (not shown), a twin-screw extruder 1, a spinneret (not shown), a windless holding section 2, a cooling section 3, a first active set of drawing rolls 4, a hot box 5, a second active set of drawing rolls 6, a oiling device 7, a winding device 8, and a hot drawing device (not shown). After a mixture consisting of polyethylene and decalin according to the mass ratio of (2: 8) - (5: 5) is mixed in a container, the mixture sequentially passes through a double-screw extruder, a spinneret plate, a windless heat preservation area, a cooling area, a first active drawing roller set, a hot box, a second active drawing roller set, an oiling device, a winding device and a hot drawing device to obtain the polyethylene fiber. Wherein the molecular weight of the polyethylene in the mixture is more than or equal to 6 multiplied by 106(ii) a After passing through the double-screw extruder, the molecular weight of polyethylene in the mixture is reduced by 30-50 percent to form a spinning solution.
Wherein the material temperature of the feeding port of the double-screw extruder ranges from 80 ℃ to 110 ℃, and the material temperature of the discharge port of the double-screw extruder ranges from 170 ℃ to 210 ℃. Researches show that the feeding temperature of the twin-screw cannot be too high so as to avoid the phenomenon of 'half-cooked' caused by dissolution of the materials without full solvation at the feeding port. The temperature of the discharge port is the final state temperature of the material, and the proper degradation and thorough dissolution of the ultra-high molecular weight polyethylene can be ensured by matching with the parameters such as the diameter, the length-diameter ratio and the like of the double screws within the temperature range of 170 plus 210 ℃, and the fluidity and the uniformity are better.
Wherein, the twin-screw of the twin-screw extruder is a co-rotating twin-screw, and the value range of the proportion of the kneading elements of the twin-screw extruder is 40-90%. Guarantee sufficient kneading element, can effectively increase the twin-screw and dissolve the effect, effectively degrade ultra high molecular weight polyethylene, avoid the production of gel particle, better provide the mobility and the homogeneity of material.
Wherein the diameter of the kneading element is more than or equal to 30mm, and the length-diameter ratio of the double-screw barrel of the double-screw extruder is in the range of (30: 1) to (200: 1). The kneading element has a certain diameter, can guarantee that no distortion occurs under the action of high-viscosity materials, simultaneously requires the double-screw cylinder to be long enough, increases the quantity of the kneading elements and improves the kneading action time of the materials, improves the retention time of the materials in the double-screw cylinder, ensures that the ultrahigh molecular weight polyethylene can be degraded properly, is not less than 30 percent but not more than 50 percent, and can be dissolved completely.
The length of the airless heat preservation area ranges from 20mm to 500mm, the airless heat preservation area is in seamless connection with the surface of the spinneret plate, the airless heat preservation area is a stable area without external air field interference, and the temperature inside the airless heat preservation area is 5 ℃ higher than that of materials in the spinneret plate. The windless heat preservation area is stable without external air field interference, and the turbulence of the spinning trickle is prevented from being disturbed, so that the turbulence is prevented, and the uniformity is not influenced. The temperature in the heat preservation district can play the effect to the face heat preservation, can let the spinning trickle of extruding from the spinneret orifice simultaneously can maintain the high temperature state at the in-process that steps down in the twinkling of an eye, realizes the purpose that the spinning unwrapps and prevents back and twine, is favorable to evenly realizing that the high power shower nozzle is tensile.
Wherein the length of the cooling zone ranges from 500mm to 1000mm, the speed of the spinning trickle passing through the cooling zone is more than or equal to 10m/min, and CO is introduced into the cooling zone2、N2One or more gases in rare gases, wherein the value range of the temperature in the cooling area is 20-50 ℃, so that the cooling solidification of the material can be rapidly realized; the value range of the wind speed in the cooling area is 0.1-2 m/s. Thereby guarantee that the material can cool off the solidification fast and form the gel silk.
Wherein, the blowing form in the cooling area is selected from one side blowing and the other side air suction; or, the air is blown around and sucked at the bottom.
The first active drafting roller group at least comprises 2 rollers, the rollers in the first active drafting roller group have the same speed, and the distance between the filament inlet point of the first active drafting roller group and the spinneret orifice of the spinneret plate ranges from 520mm to 1500 mm.
Wherein the first active draft roller set and the hot box are in the same vertical linear direction, as shown in fig. 2; alternatively, the active draft roller set and the hot box are at a 90 ° angle, as shown in fig. 3. The method is favorable for reducing the height of a factory building, can be designed according to the needs, and has no influence on the final performance of the fiber.
Wherein the temperature in the hot box ranges from 100 ℃ to 140 ℃, and the pre-drawing drying of the gel filaments and the volatilization of the decalin vapor are facilitated under the temperature condition; introducing CO into the hot box2、N2One or more of rare gas and water vapor, thereby avoiding the chemical reaction of the gas introduced into the hot box with the raw materials and the intermediate products.
Wherein, steam is introduced into the hot box. The gel silk is heated and fumigated by water vapor, and can be heated, desolventized and pre-drawn. At this time, the hot box is a pressure vessel, and the pressure resistance of the pressure vessel is more than or equal to 4.0 MPa.
Wherein, the value range of the rotating speed ratio of the second active drafting roller group to the first active drafting roller group is (2: 1) - (7: 1).
Wherein, when passing through the oiling device, the oil on the tow blanket is an oil agent containing an antioxidant.
Wherein the oil is conventional spinning oil, and the antioxidant can be dispersed in the oil.
The polyethylene fiber provided by the invention can be used for a lifting elevator cable, or a landslide protection net, or a mud-stone flow blocking net or a mud blocking net after being woven.
Examples
TABLE 1 operating parameters for examples 1-20 and comparative examples 1-3
TABLE 1 EXAMPLES 1 TO 20, COMPARATIVE EXAMPLES 1 TO 3
TABLE 2 results of examples 1 to 20 and comparative examples 1 to 3
| Serial number | Strength cN/dtex of polyethylene fiber product | Modulus cN/dtex of polyethylene fiber product | Evenness CV value of polyethylene fiber product% |
| Example 1 | 48.23 | 2219.00 | 1.80 |
| Example 2 | 45.79 | 2100.00 | 1.70 |
| Example 3 | 45.68 | 2001.87 | 1.90 |
| Example 4 | 45.00 | 2011.35 | 2.00 |
| Example 5 | 46.23 | 2038.70 | 1.93 |
| Practice ofExample 6 | 45.79 | 2010.79 | 1.97 |
| Example 7 | 46.66 | 2099.82 | 1.99 |
| Example 8 | 47.93 | 2187.18 | 1.84 |
| Example 9 | 48.28 | 2258.14 | 0.90 |
| Example 10 | 46.37 | 2018.90 | 0.79 |
| Example 11 | 45.11 | 2001.00 | 1.01 |
| Example 12 | 46.59 | 2100.70 | 1.39 |
| Example 13 | 51.18 | 2450.39 | 1.01 |
| Example 14 | 49.76 | 2387.77 | 1.87 |
| Example 15 | 48.21 | 2200.24 | 1.93 |
| Example 16 | 46.33 | 2035.50 | 1.50 |
| Example 17 | 45.97 | 2001.76 | 1.49 |
| Example 18 | 47.29 | 2100.01 | 1.77 |
| Example 19 | 46.98 | 2031.88 | 1.60 |
| Example 20 | 46.20 | 2021.14 | 1.77 |
| Comparative example 1 | 41.00 | 1931.72 | 1.93 |
| Comparative example 2 | 40.81 | 1800.54 | 2.01 |
| Comparative example 3 | 42.60 | 1804.59 | 4.29 |
From the above examples 1 to 20, it is understood that the fiber strength of the polyethylene and decalin prepared from the raw materials in the mass ratio of (2: 8) to (5: 5) was not less than 45cN/dtex, the modulus was not less than 2000cN/dtex, and the yarn levelness CV was not more than 2% without adding any antioxidant and other additives during the dissolution. The device can be used for lifting elevator ropes, or landslide protection nets, or mud-stone flow resistance separation nets or mud blocking nets. And the spinning concentration of the comparative examples 1-3 is lower, so that the production cost is higher, and the performance of the obtained polyethylene fiber is obviously lower than that of the polyethylene fiber prepared by the technical scheme of the invention.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (17)
1. The preparation method of the polyethylene fiber comprises the steps of preparing the polyethylene fiber from polyethylene and decalin according to the mass ratio of (2: 8) - (5: 5), wherein the molecular weight of the polyethylene is more than or equal to 6 x 106(ii) a The strength of the polyethylene fiber is more than or equal to 45cN/dtex, the modulus is more than or equal to 2000cN/dtex, and the yarn levelness CV value is less than or equal to 2%;
the preparation method of the polyethylene fiber is characterized by comprising the following steps:
mixing polyethylene and decahydronaphthalene in the mass ratio of (2: 8) - (5: 5) to form a mixture, wherein the polyethylene is prepared from the polyethyleneMolecular weight is more than or equal to 6 multiplied by 106；
After the mixture passes through a double-screw extruder, the molecular weight of polyethylene in the mixture is reduced by 30-50 percent to form a spinning solution;
the spinning solution is sprayed out from a spinneret orifice of a spinneret plate and then passes through a windless heat preservation area to obtain a spinning trickle;
cooling and solidifying the spinning trickle in a cooling area to obtain gel yarns;
winding the gel silk onto a first active drafting roller set to obtain the gel silk subjected to primary drafting;
the jelly glue yarn subjected to primary drawing sequentially passes through a hot box, a second active drawing roller set, an oiling device and a winding device to obtain a wound tow;
the coiled tows are subjected to thermal stretching treatment to obtain the polyethylene fibers;
the diameter of a kneading element of the double-screw extruder is more than or equal to 30mm, and the length-diameter ratio of a double-screw cylinder of the double-screw extruder is in a range of (30: 1) - (200: 1).
2. The method for preparing polyethylene fiber according to claim 1, wherein the temperature of the material at the feed inlet of the twin-screw extruder is in the range of 80 ℃ to 110 ℃, and the temperature of the material at the discharge outlet of the twin-screw extruder is in the range of 170 ℃ to 210 ℃.
3. The method for preparing polyethylene fiber according to claim 1, wherein the twin screws of the twin screw extruder are co-rotating twin screws, and the proportion of the kneading elements of the twin screw extruder is in the range of 40% to 90%.
4. The method for producing a polyethylene fiber according to claim 1,
the length of the airless heat preservation area ranges from 20mm to 500mm,
the airless heat preservation area is connected with the plate surface of the spinneret plate in a seamless way,
the non-wind heat preservation area is a stable area without external air field interference,
the temperature in the airless heat preservation area is 5 ℃ higher than that of the materials in the spinneret plate.
5. The method for producing a polyethylene fiber according to claim 1,
the length of the cooling zone ranges from 500mm to 1000mm,
the speed of the spinning trickle passing through the cooling zone is more than or equal to 10m/min,
introducing CO into the cooling zone2、N2One or more of rare gases,
the temperature in the cooling area ranges from 20 ℃ to 50 ℃;
the value range of the wind speed in the cooling area is 0.1-2 m/s.
6. A process for the preparation of polyethylene fibers according to claim 5, wherein the form of the air blown in the cooling zone is selected from,
one side blows air, and the other side sucks air; or,
blowing air around and sucking air from bottom.
7. The method for producing a polyethylene fiber according to claim 1,
the first active draft roll group comprises at least 2 rolls,
the rollers in the first active draft roller group have the same speed,
the distance between the filament inlet point of the first active drawing roller group and the spinneret orifice of the spinneret plate ranges from 520mm to 1500 mm.
8. The method of claim 1, wherein the first set of active draw rolls is aligned with the hot box or the set of active draw rolls is at a 90 ° angle to the hot box.
9. The method for producing a polyethylene fiber according to claim 1,
the temperature in the hot box ranges from 100 ℃ to 140 ℃,
introducing CO into the hot box2、N2One or more of rare gas and water vapor.
10. The method for preparing polyethylene fiber according to claim 9, wherein the hot box is filled with water vapor.
11. The method for preparing polyethylene fiber according to claim 10, wherein the hot box is a pressure vessel, and the pressure vessel has a pressure resistance of 4.0MPa or more.
12. The method of claim 1, wherein the ratio of the rotational speed of the second active set of draw rolls to the rotational speed of the first active set of draw rolls is in the range of (2: 1) to (7: 1).
13. The process for preparing polyethylene fiber according to claim 1, wherein the oil on the strand coat is an oil agent containing an antioxidant while passing through the oiling device.
14. The process for preparing polyethylene fibers according to claim 13, wherein the finish is a conventional spin finish, and the antioxidant is dispersible in the finish.
15. A polyethylene fiber prepared by the method of any one of claims 1 to 14, wherein the polyethylene fiber comprises polyethylene and decalin at a mass ratio of (2: 8)) The raw materials of (5: 5) and the molecular weight of the polyethylene is more than or equal to 6 multiplied by 106；
The strength of the polyethylene fiber is more than or equal to 45cN/dtex, the modulus is more than or equal to 2000cN/dtex, and the yarn levelness CV value is less than or equal to 2%.
16. Use of the polyethylene fiber of claim 15 after weaving for elevator ropes.
17. Use of the polyethylene fiber of claim 15 after weaving for landslide protection nets, or mud-rock flow barrier nets or mud barrier nets.
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| CN106637435A (en) * | 2016-12-29 | 2017-05-10 | 中国纺织科学研究院 | Polyethylene fiber and continuous and stable preparation device and continuous and stable preparation method thereof |
| CN110093678A (en) * | 2019-04-30 | 2019-08-06 | 上海化工研究院有限公司 | The method of melt frozen glue and separation of solid and liquid in ultra-high molecular weight polyethylene dry spinning |
| CN111118616B (en) * | 2019-12-31 | 2024-03-01 | 中国纺织科学研究院有限公司 | Method for preparing polyethylene fiber filaments by solution method |
| CN111074358A (en) * | 2019-12-31 | 2020-04-28 | 中国纺织科学研究院有限公司 | Method for preparing polyethylene fiber by double-metering conveying method |
| CN111733465B (en) * | 2020-06-24 | 2021-12-31 | 上海化工研究院有限公司 | High-strength polyethylene fiber melt spinning method and device |
| CN113995047B (en) * | 2021-07-13 | 2024-02-20 | 哈尔滨福肴食品有限公司 | Device and method for improving digestion and absorption characteristics of high-moisture plant-based protein meat |
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