CN113249814A - Production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fiber - Google Patents
Production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fiber Download PDFInfo
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- CN113249814A CN113249814A CN202110526669.4A CN202110526669A CN113249814A CN 113249814 A CN113249814 A CN 113249814A CN 202110526669 A CN202110526669 A CN 202110526669A CN 113249814 A CN113249814 A CN 113249814A
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- ultrahigh
- temperature
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- strength polyethylene
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- 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
- 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
Abstract
The invention discloses a production method of ultra-high-temperature-resistant ultra-high-strength polyethylene fibers, which is applied to the field of fiber manufacturing and solves the technical problems of poor high-temperature resistance and limited application of the existing ultra-high-strength polyethylene fibers, and the technical scheme is characterized by comprising the following steps: (1) preparing raw materials; (2) extruding by a screw; (3) spinning; (4) water cooling extraction; (5) heating and drafting; (6) and the winding package has the technical effect of improving the high-temperature resistance of the polyethylene fiber.
Description
Technical Field
The invention relates to the field of fibers, in particular to a production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers.
Background
Polyethylene (UHMW-PE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive performance, has excellent impact resistance, abrasion resistance, chemical corrosion resistance, self-lubricating property and other properties, and polyethylene fiber is synthetic fiber prepared by spinning or preparing a film from polytetrafluoroethylene and then cutting or fibrillating. It has the characteristics of high temperature resistance, aging resistance, corrosion resistance and the like; the polyethylene fiber can work in the environment with the temperature as high as 150 ℃, can be widely used as an exhaust purification filter material for garbage incinerators and coal boilers, a non-metallic bearing, a plastic filler for reducing friction, sewing threads and the like, but the existing polyethylene fiber has low high temperature resistance and limited application range.
Disclosure of Invention
The invention aims to provide a production method of ultra-high-temperature resistant ultra-high-strength polyethylene fibers, which is beneficial to improving the high-temperature resistance of the polyethylene fibers.
The technical purpose of the invention is realized by the following technical scheme: a production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers is characterized by comprising the following steps: the method comprises the following steps:
(1) and raw material preparation: taking a part of ultra-high molecular weight polyethylene powder with the molecular weight of between 650 and 800 thousands, adding high-strength carbon fiber powder with the grade of T600-750, stirring and mixing, synchronously adding acrylic resin powder into the mixed solution with the viscosity of 6-8 thousands, stirring for 10-15min, sequentially adding solvent oil, antioxidant and modifier, and stirring for 30-60min to obtain a material suspension mixed solution;
(2) and screw extrusion: melting and extruding by adopting a double-screw extruder;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction;
(5) and heating and drawing: pre-drafting the filaments in the step (4) by a drafting machine at the temperature of 90-140 ℃, washing the pre-drafted filaments with water, and then performing multi-stage heating drafting at the temperature of 150-200 ℃;
(6) and (5) winding and packaging.
Further: in the step (1), the mass fraction ratio of the high-strength carbon fiber powder to the acrylic resin powder is 3-10.
Further: the extrusion temperature in the step (2) is controlled between 130 ℃ and 170 ℃, and the output power of the extruder is 2500W.
Further: the temperature of the pre-drafting in the step (5) always meets the requirement of controlling the temperature to be more than half of the temperature of the subsequent multi-stage heating drafting.
Further: and (2) sequentially mixing and feeding the ultrahigh molecular weight polyethylene powder, the high-strength carbon fiber powder and the acrylic resin powder in the step (1), wherein the feeding time interval is not more than 2 min.
Further: the extractant in the step (4) is a hydrocarbon extractant.
Further: the spinning solvent in the step (3) is one or more of decahydronaphthalene, vegetable oil, mineral oil or tetrahydronaphthalene.
Further: and (6) adopting a double-layer vacuumizing packaging process.
In conclusion, the invention has the following beneficial effects:
1. by adding high-strength carbon fiber powder, acrylic resin powder and the like in different proportions into the raw material mixture, controlling the specifications of different raw materials, adapting to different production factors such as extrusion temperature, wire drawing temperature and the like, the processed product has obvious high-temperature resistance and wider application range.
Detailed Description
The present invention will be described in further detail below.
The first embodiment is as follows: a production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers is characterized by comprising the following steps: the method comprises the following steps:
(1) and raw material preparation: taking a part of ultra-high molecular weight polyethylene powder with the molecular weight of 650 ten thousand, adding high-strength carbon fiber powder T600, stirring and mixing, synchronously adding acrylic resin powder into the mixed solution, wherein the viscosity is 6 ten thousand, and the mass fraction ratio of the high-strength carbon fiber powder to the acrylic resin powder is 3: 1, sequentially mixing and feeding ultra-high molecular weight polyethylene powder, high-strength carbon fiber powder and acrylic resin powder, wherein the feeding time interval does not exceed 2min, continuously stirring for 10min in the mixing process, sequentially adding solvent oil, an antioxidant and a modifier, and stirring for 35min to obtain a material suspension mixed solution;
(2) and screw extrusion: adopting a double-screw extruder to perform melt extrusion, wherein the extrusion temperature is 130 ℃, and the output power of the extruder is 2500W;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning, wherein a spinning solvent is a decahydronaphthalene solution;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction, wherein an extracting agent is a hydrocarbon extracting agent;
(5) and heating and drawing: pre-drafting the filaments obtained in the step (4) through a drafting machine, controlling the temperature to be between 90 ℃, controlling the temperature of the pre-drafting to be more than half of the temperature of the subsequent multistage heating drafting all the time, washing the pre-drafted filaments with water, and then performing multistage heating drafting, wherein the temperature is controlled to be 150 ℃;
(6) and winding and packaging by adopting a double-layer vacuumizing packaging process.
Example two: 1. a production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers is characterized by comprising the following steps: the method comprises the following steps:
(1) and raw material preparation: taking a part of ultra-high molecular weight polyethylene powder with the molecular weight of 800 ten thousand, adding high-strength carbon fiber powder T750, stirring and mixing, synchronously adding acrylic resin powder into the mixed solution, wherein the viscosity is 8 ten thousand, and the mass fraction ratio of the high-strength carbon fiber powder to the acrylic resin powder is 7: 1, sequentially mixing and feeding ultra-high molecular weight polyethylene powder, high-strength carbon fiber powder and acrylic resin powder, wherein the feeding time interval does not exceed 2min, stirring for 15min, sequentially adding solvent oil, an antioxidant and a modifier, and stirring for 60min to obtain a material suspension mixed solution;
(2) and screw extrusion: adopting a double-screw extruder to perform melt extrusion, controlling the extrusion temperature at 170 ℃, and controlling the output power of the extruder to be 2500W;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning, wherein a spinning solvent is a mixed solution of decalin, vegetable oil and mineral oil;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction, wherein an extracting agent is a hydrocarbon extracting agent;
(5) and heating and drawing: pre-drafting the filaments in the step (4) through a drafting machine, wherein the pre-drafting temperature always meets the requirement of being controlled to be more than half of the temperature of subsequent multistage heating and drafting, the temperature is controlled to be 140 ℃, the filaments which are subjected to pre-drafting are washed with water and cooled, and then multistage heating and drafting are carried out, and the temperature is controlled to be 200 ℃;
(6) and winding and packaging by adopting a double-layer vacuumizing packaging process.
Example three: 1. a production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers is characterized by comprising the following steps: the method comprises the following steps:
(1) and raw material preparation: taking a part of ultra-high molecular weight polyethylene powder with the molecular weight of 700 ten thousand, adding high-strength carbon fiber powder T700, stirring and mixing, synchronously adding acrylic resin powder into the mixed solution, wherein the viscosity is 7 ten thousand, and the mass fraction ratio of the high-strength carbon fiber powder to the acrylic resin powder is 5: 1, sequentially mixing and feeding ultra-high molecular weight polyethylene powder, high-strength carbon fiber powder and acrylic resin powder, wherein the feeding time interval does not exceed 2min, stirring for 12min, sequentially adding solvent oil, an antioxidant and a modifier, and stirring for 50min to obtain a material suspension mixed solution;
(2) and screw extrusion: adopting a double-screw extruder to perform melt extrusion, wherein the extrusion temperature is 150 ℃, and the output power of the extruder is 2500W;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning, wherein a spinning solvent is a tetrahydronaphthalene solution;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction, wherein an extracting agent is a hydrocarbon extracting agent;
(5) and heating and drawing: pre-drafting the filaments obtained in the step (4) through a drafting machine, wherein the pre-drafting temperature always meets the requirement of controlling the temperature to be more than half of the temperature of subsequent multistage heating and drafting, the temperature is controlled to be 1000 ℃ 0, the pre-drafted filaments are washed with water and cooled, and then multistage heating and drafting are carried out, and the temperature is controlled to be 180 ℃;
(6) and winding and packaging by adopting a double-layer vacuumizing packaging process.
Comparative example:
(1) and raw material preparation: adding solvent oil, antioxidant and modifier into one part of ultra-high molecular weight polyethylene powder, and stirring for 30min to obtain a material suspension mixed solution;
(2) and screw extrusion: melting and extruding by adopting a double-screw extruder;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction;
(5) and heating and drawing: washing the filaments obtained in the step (4) with water, and then heating and drawing, wherein the temperature is controlled at 150 ℃;
(6) and (5) winding and packaging.
Comparing the products produced in the first embodiment, the second embodiment and the third embodiment with the products produced in the comparative example in an all-around manner, wherein although no obvious difference exists in appearance outline, the specification of the products processed by the scheme can normally reach 400D-450D, the high temperature resistant range can reach 360-400 ℃, the strength can reach more than 32 and the highest can reach 38; the comparative example is used as the common production process of the ultra-high strength polyethylene fiber at present, various parameters of the produced product are in obvious lag, particularly the hardness of the product is only 25-30 ℃, and the highest tolerance temperature of the product can only reach about 150 ℃, which directly reflects that the ultra-high strength polyethylene fiber can only adapt to a low-temperature working environment under the prior art process, and once the ultra-high strength polyethylene fiber is in a high temperature, the product has obvious defects, but the product under the technical scheme of the invention has obvious advantages and obvious improvement on the high temperature resistance.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A production method of ultrahigh-temperature-resistant ultrahigh-strength polyethylene fibers is characterized by comprising the following steps: the method comprises the following steps:
(1) and raw material preparation: taking a part of ultra-high molecular weight polyethylene powder with the molecular weight of between 650 and 800 thousands, adding high-strength carbon fiber powder with the grade of T600-750, stirring and mixing, synchronously adding acrylic resin powder into the mixed solution with the viscosity of 6-8 thousands, stirring for 10-15min, sequentially adding solvent oil, antioxidant and modifier, and stirring for 30-60min to obtain a material suspension mixed solution;
(2) and screw extrusion: melting and extruding by adopting a double-screw extruder;
(3) and spinning: conveying the material solution to a spinning box through a metering pump for spinning;
(4) and water-cooling extraction: leading the strand silk obtained in the step (3) into an extraction box body for continuous stretching and extraction;
(5) and heating and drawing: pre-drafting the filaments in the step (4) by a drafting machine at the temperature of 90-140 ℃, washing the pre-drafted filaments with water, and then performing multi-stage heating drafting at the temperature of 150-200 ℃;
(6) and (5) winding and packaging.
2. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: in the step (1), the mass fraction ratio of the high-strength carbon fiber powder to the acrylic resin powder is 3-10.
3. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: the extrusion temperature in the step (2) is controlled between 130 ℃ and 170 ℃, and the output power of the extruder is 2500W.
4. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: the temperature of the pre-drafting in the step (5) always meets the requirement of controlling the temperature to be more than half of the temperature of the subsequent multi-stage heating drafting.
5. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: and (2) sequentially mixing and feeding the ultrahigh molecular weight polyethylene powder, the high-strength carbon fiber powder and the acrylic resin powder in the step (1), wherein the feeding time interval is not more than 2 min.
6. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: the extractant in the step (4) is a hydrocarbon extractant.
7. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: the spinning solvent in the step (3) is one or more of decahydronaphthalene, vegetable oil, mineral oil or tetrahydronaphthalene.
8. The method for producing ultrahigh-strength polyethylene fiber with ultrahigh temperature resistance according to claim 1, which is characterized in that: and (6) adopting a double-layer vacuumizing packaging process.
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| TWI766812B (en) * | 2021-10-08 | 2022-06-01 | 銓程國際股份有限公司 | Manufacturing method and system of ultra-high molecular fiber |
| CN114855293A (en) * | 2022-04-22 | 2022-08-05 | 首都博物馆 | Preparation method and application of special ultrahigh molecular polyethylene fiber material for cultural relics |
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| CN114855293A (en) * | 2022-04-22 | 2022-08-05 | 首都博物馆 | Preparation method and application of special ultrahigh molecular polyethylene fiber material for cultural relics |
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