CN103882561A - Microwave-assisted extraction and drying process for high-strength high-modulus polyethylene gel fiber - Google Patents
Microwave-assisted extraction and drying process for high-strength high-modulus polyethylene gel fiber Download PDFInfo
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- CN103882561A CN103882561A CN201410079520.6A CN201410079520A CN103882561A CN 103882561 A CN103882561 A CN 103882561A CN 201410079520 A CN201410079520 A CN 201410079520A CN 103882561 A CN103882561 A CN 103882561A
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Abstract
The invention discloses a microwave-assisted extraction and drying process for a high-strength high-modulus polyethylene gel fiber. The process comprises the following steps: by taking dichloromethane as an extraction agent, continuously extracting and drying in the same closed extraction device with a microwave radiation source; carrying out microwave-assisted extraction on ultra-high molecular weight polyethylene gel-spun fibers prepared on a spinning section in a primary extracting tank with a microwave radiation source, and performing microwave drying in a microwave drying box; drawing the dried fibers to prepare the finished high-strength high-modulus polyethylene fiber. The microwave-assisted extraction and drying sections can be continuously performed by transforming a conventional extraction device, extra drying equipment is not needed, and the equipment investment is reduced. Moreover, only primary extraction is needed, over 99.5 percent of a first solvent in the gel-spun fibers can be extracted, the extracting power is high, the amount of the extraction agent is small, and the safety performance is high. The prepared finished fiber is good in mechanical property, and the oil content is less than 0.5 percent.
Description
Technical field
The present invention relates to a kind of microwave abstracting, drying process of high-strength high-modulus polyethylene gel spun fiber.
Background technology
High-strength high-modulus polyethylene fiber is the third generation high-performance fiber occurring after carbon fiber and aramid fiber, and, Gao Mo high-strength with it, light weight, wear-resistant, low temperature resistant, UV resistant, anti-shielding, pliability is good, impact energy absorb is high and numerous excellent properties such as strong alkali-acid resistance chemical attack and being widely used in navigation, Aeronautics and Astronautics, defend equipment and modernized war.
At present suitability for industrialized production polyethylene fiber adopts gel spinning---high power heat stretching process, and this technique can be divided into again two kinds of dry method and wet methods.Spin company except Dutch DSM, Japanese Japan and adopt dry process, other company all adopts wet processing.
Wet processing is divided into spinning solution preparation, draws gel strand, extracts dry and set-stretching four procedures.The spun filament of preparing through gel spinning is the swelling gelinite of a kind of height, includes a large amount of high boiling solvents and makes macromolecular chain solvation, has reduced secondary bond power and the entanglement dot density of interchain.Solvation reduces the lax activation energy of macromolecular chain, and activity increases, and in the time bearing tension force, relative slippage while especially at high temperature stretching, has reduced the strength and modulus of fiber, therefore must be except desolventizing.
Generally adopt at present extraction mode to remove high boiling solvent in gel strand, often adopt multitple extraction for improving extraction efficiency, cause extraction and cost recovery high, and because extractant mostly is low boiling volatile substances, easily produce safety and environmental issue.For removing extractant remaining in gel strand, need be dried processing.And the dry heated-air drying that adopts more, because polyethylene strand is sent into hothouse by conveyer belt (being generally iron net), while carrying out heated-air drying, easily cause strand with the contact-making surface of iron net on local heating excessive, strand is heated inhomogeneous, makes finished product strand mechanical property unstable.
In CN100427653C taking hydrocarbon as extractant, gel fiber is through boundling tension bracket, point guide frame, pressing oil roll, hydrocarbon liquid preliminary treatment bath, seven roller carry-over pinch rolls, the hydrocarbon extraction tank of ultrasonic wave, heated-air drying, multistage stretching, the high-strength high-modulus polyethylene fiber of reeling to obtain, solvent 1.2-1.8%.This technological process is longer, and rate of extraction has been accelerated in ultrasonic extraction greatly, but has also accelerated the volatilization of extractant simultaneously, causes the increase of fiber cost, has worsened environment.
CN1912198A discloses the drawing extraction method in a kind of preparation process of ultrahigh molecular weight polyethylene fiber.In extraction process, carry out drawing-off operation simultaneously, can impel fiber surface generation Surface Renewal, the cortex that elimination may occur, accelerates rate of extraction; Due to the existence of drafting stress, impel the cavity closure occurring after solvent release as-spun fibre, make fibre structure more fine and close.For obtaining suitable drawing-off multiplying power, need between each extraction tank, distribute suitable drawing-off multiplying power, this has just increased operation easier, and need to increase godet roller and motor number, increases equipment investment.
CN1693545A discloses supercritical extract and the drying means in a kind of superhigh molecular weight polyethylene fibers preparation.It is extractant that the method is selected the one in methane, ethane, propane, ethene, propylene, extracts and completes with being dried in same equipment, simplified technical process, but supercritical extract needs High Temperature High Pressure, to equipment require highly, security reduces greatly.
CN102115964B has proposed a kind of drying means of superhigh molecular weight polyethylene fibers, and strand is carried out to three-stage drying, and changes the blowing direction of hot blast, and strand is heated evenly, and stablizes the mechanical property of strand.Owing to having adopted three-stage drying, increase the investment to equipment, and due to the thermal conductivity of iron net, can not make strand be heated evenly completely, in the time of ultra-drawing, be prone to " lousiness " and " broken end " phenomenon.
Summary of the invention
The object of the present invention is to provide a kind of microwave abstracting, drying process of the high-strength high-modulus polyethylene gel spun fiber that fibrous finished product mechanical property is good, process safety performance is high making.
Technical solution of the present invention is:
The microwave abstracting of high-strength high-modulus polyethylene gel spun fiber, a drying process, is characterized in that: taking carrene as extractant, extract and be dried in same the airtight extraction equipment that has microwave radiation source and carry out continuously; The ultra-high molecular weight polyethylene gel fiber being made by spinning workshop section, enters in the extraction tank of microwave radiation source, to carry out entering after microwave abstracting again and in microwave drying section, carries out microwave drying section; Dried fiber drawn makes high-strength high-modulus polyethylene fiber finished product.
The speed that ultra-high molecular weight polyethylene gel fiber enters microwave drying oven is 5-50m/min.
On extractant in extraction tank, add water to carry out water seal, water seal thickness is between 5-25cm.
In microwave drying oven, carry out microwave drying, collect the carrene obtaining and be back to one-level extraction.
The present invention transforms and can carry out continuously microwave abstracting and dry on existing extraction equipment, without extra drying equipment, has reduced equipment investment.And only need carry out one-level extraction and can extract the first more than 99.5% solvent in gel fiber, extracting power is strong, and Solvent quantity is few, and security performance is high.Adopt microwave drying section to replace traditional heated-air drying, can make gel strand be heated evenly, and not damage fibrous inner structure, the fibrous finished product mechanical property making is good, and oil content is lower than 0.5%.In addition, extract and carry out with being dried in same obturator, volatile extractant under condensation, has increased the rate of recovery of extractant on condenser, non-environmental-pollution problem.
Below in conjunction with embodiment, the invention will be further described.
Detailed description of the invention
The microwave abstracting of high-strength high-modulus polyethylene gel spun fiber, a drying process, taking carrene as extractant, extract and be dried in same the airtight extraction equipment that has microwave radiation source and carry out continuously; The ultra-high molecular weight polyethylene gel fiber being made by spinning workshop section, enter in the one-level extraction tank of microwave radiation source (in-built extractant carrene, has 10cm water seal on carrene) carries out after microwave abstracting entering and in microwave drying section, carrying out microwave drying section with the speed of 7m/min with the speed of 5m/min again.Dried fiber makes polyethylene fiber finished product through three grades of ultra-drawings, and intensity reaches 45.2, and modulus reaches 235, oil content 0.27%.While carrying out microwave drying section in microwave drying section, collect the carrene obtaining and be back to one-level extraction.
Claims (5)
1. the microwave abstracting of high-strength high-modulus polyethylene gel spun fiber, a drying process, is characterized in that: taking carrene as extractant, extract and be dried in same the airtight extraction equipment that has microwave radiation source and carry out continuously; The ultra-high molecular weight polyethylene gel fiber being made by spinning workshop section, enters in the extraction tank of microwave radiation source, to carry out entering after microwave abstracting again and in microwave drying oven, carries out microwave drying; Dried fiber drawn makes high-strength high-modulus polyethylene fiber finished product.
2. the microwave abstracting of high-strength high-modulus polyethylene gel spun fiber according to claim 1, drying process, is characterized in that: the speed that ultra-high molecular weight polyethylene gel fiber enters microwave drying is 5-50m/min.
3. the microwave abstracting of high-strength high-modulus polyethylene gel spun fiber according to claim 1 and 2, drying process, is characterized in that: extractant comprises carrene, tetrachloro-ethylene, trichloro-ethylene.
4. the microwave abstracting of high-strength high-modulus polyethylene gel spun fiber according to claim 1 and 2, drying process, is characterized in that: on the extractant in extraction tank, add water to carry out water seal, water seal thickness is between 5-25cm.
5. the microwave abstracting of high-strength high-modulus polyethylene gel spun fiber according to claim 1 and 2, drying process, is characterized in that: in microwave drying section, carry out microwave drying section, collect the solvent reclaiming obtaining in extraction.
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| CN201410079520.6A CN103882561B (en) | 2014-03-06 | 2014-03-06 | The microwave abstracting of high-strength high-modulus polyethylene gel spun fiber, drying process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149099A (en) * | 2016-06-30 | 2016-11-23 | 吉岡诚 | A kind of preparation method of high intensity alginate fibre |
| CN107858763A (en) * | 2016-09-21 | 2018-03-30 | 九力绳缆有限公司 | The preparation method of superhigh molecular weight polyethylene fibers with super heavy denier yarn and its superhigh molecular weight polyethylene fibers of preparation |
| CN110117820A (en) * | 2019-04-16 | 2019-08-13 | 山东莱威新材料有限公司 | A kind of preparation method of spray process extraction high-strength high-modulus polyethylene gel spun fiber |
| CN110205711A (en) * | 2019-04-16 | 2019-09-06 | 山东莱威新材料有限公司 | A kind of preparation method of vapor phase method extraction high-strength high-modulus polyethylene gel spun fiber |
| CN111321474A (en) * | 2020-02-29 | 2020-06-23 | 山东新兴安全防护设备股份有限公司 | Production process of ultra-high molecular weight polyethylene fiber |
| CN112342645A (en) * | 2019-08-06 | 2021-02-09 | 江苏九九久科技有限公司 | Method for producing high-strength high-modulus polyethylene fiber by using tetrachloroethylene as second solvent through gel method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149099A (en) * | 2016-06-30 | 2016-11-23 | 吉岡诚 | A kind of preparation method of high intensity alginate fibre |
| CN107858763A (en) * | 2016-09-21 | 2018-03-30 | 九力绳缆有限公司 | The preparation method of superhigh molecular weight polyethylene fibers with super heavy denier yarn and its superhigh molecular weight polyethylene fibers of preparation |
| CN110117820A (en) * | 2019-04-16 | 2019-08-13 | 山东莱威新材料有限公司 | A kind of preparation method of spray process extraction high-strength high-modulus polyethylene gel spun fiber |
| CN110205711A (en) * | 2019-04-16 | 2019-09-06 | 山东莱威新材料有限公司 | A kind of preparation method of vapor phase method extraction high-strength high-modulus polyethylene gel spun fiber |
| CN112342645A (en) * | 2019-08-06 | 2021-02-09 | 江苏九九久科技有限公司 | Method for producing high-strength high-modulus polyethylene fiber by using tetrachloroethylene as second solvent through gel method |
| CN111321474A (en) * | 2020-02-29 | 2020-06-23 | 山东新兴安全防护设备股份有限公司 | Production process of ultra-high molecular weight polyethylene fiber |
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| CN103882561B (en) | 2015-11-18 |
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Address after: 226407 the Yellow Sea three road, Nantong Economic Development Zone, Rudong County, Jiangsu, China Patentee after: JIANGSU BICON PHARMACEUTICAL Co.,Ltd. Address before: 226407 the Yellow Sea three road, Nantong Economic Development Zone, Rudong County, Jiangsu, China Patentee before: JIANGSU JIUJIUJIU TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20171227 Address after: 226407 Rudong Economic Development Zone, Nantong, the Yellow Sea, No., No. three road, No. 12 Patentee after: JIANGSU JIUJIUJIU TECHNOLOGY Co.,Ltd. Address before: 226407 the Yellow Sea three road, Nantong Economic Development Zone, Rudong County, Jiangsu, China Patentee before: JIANGSU BICON PHARMACEUTICAL Co.,Ltd. |
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Effective date of registration: 20230424 Address after: 226400 No.26 Xianghai Avenue, Yangkou Town, Rudong County, Nantong, Jiangsu Patentee after: Kyushu Star Technology Co.,Ltd. Address before: 226407 No.12, Huanghai 3rd road, Rudong Coastal Economic Development Zone, Nantong City, Jiangsu Province Patentee before: JIANGSU JIUJIUJIU TECHNOLOGY Co.,Ltd. |
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