CN103290494A - Polyving akohol dry spinning preparing method - Google Patents
Polyving akohol dry spinning preparing method Download PDFInfo
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- CN103290494A CN103290494A CN2013102505951A CN201310250595A CN103290494A CN 103290494 A CN103290494 A CN 103290494A CN 2013102505951 A CN2013102505951 A CN 2013102505951A CN 201310250595 A CN201310250595 A CN 201310250595A CN 103290494 A CN103290494 A CN 103290494A
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Abstract
The invention discloses a polyving akohol dry spinning preparing method. The polyving akohol dry spinning preparing method includes the following steps: a, polyving akohol washing, b, dewatering, c, dissolving, d, filtering, e, filtering, f, spinning, g, dry heating stretching, h, filament winding. The polyving akohol dry spinning preparing method has the advantages of being economical, efficient, low in production cost, capable of achieving the production of filament fibers of different qualities, wide in the application range in engineering and industry aspects of producing the polyving akohol filament fibers, and simple in production process.
Description
Technical field
The present invention relates to spinning process method field, refer more particularly to a kind of preparation method of polyvinyl alcohol dry spinning.
Background technology
Domestic polyvinyl alcohol (PVA) fiber production method mainly contains two kinds of wet spinning and the spinning of frozen glue method.And existing technology all can't be produced polyvinyl alcohol (PVA) filament fiber, can only produce vinal by wet spinning process, spin by spinning or tow-to-yarn direct spinning technology again and obtain polyvinyl alcohol (PVA) fiber yarn, thereby limited its application in engineering and industrial aspect, and the technological process of production is long; Production efficiency is low, processing cost is high, and competitive advantage is not obvious.
Polyvinyl alcohol dry method long filament more can be brought into play powerful height, modulus is big, the dry heat resistance performance is good, and weather fastness is good, the characteristic of durability and process operation function admirable, can be applicable to high-tenacity conveyer belt, high pressure resistant sebific duct, big capacity flexible containers, high-tenacity plastics and the contour performance product scope of rubber reinforcing material.Compare with wet method crush cutting yarn, weave owing to can be directly used in behind the long filament doubling twisting, saved loaded down with trivial details crush cutting yarn operation, so production procedure is short, technology is simple, compares with existing Wet PVA spinning technique, do not need a large amount of industrial chemicals, basic three-waste free discharge.
But utilize fibres in differentiation such as polyvinyl alcohol dry spinning technology production multipurpose high-tenacity fiber, water-soluble fibre, ion-exchange fibre, so the exploitation of polyvinyl alcohol dry spinning technology will become the important technology basis of vinal new product and polyvinyl alcohol fibre in differentiation.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point of the prior art and provide that a kind of production efficiency height, processing cost are low, the preparation method of the simple polyvinyl alcohol dry spinning of technology.
The present invention realizes in the following way:
A kind of preparation method of polyvinyl alcohol dry spinning is characterized in that: may further comprise the steps:
A. polyvinyl alcohol washing: drop into the degree of polymerization 200～3000 in rinsing bowl, alcoholysis degree carries out twice washing at polyvinyl alcohol 400Kg～1000Kg of 50～100 with 30 times soft water;
B. dehydration: the moisture content after centrifugal dehydration of the polyvinyl alcohol after the washing enters screw extruder and carries out just molten 50 ± 1%～68 ± 1%;
C. dissolving: first polyvinyl alcohol after molten drops in the dissolving machine, with the air in the vavuum pump suction dissolving machine vacuum is reached and in the chuck of dissolving machine, feed the 2kg/cm2 Steam Heating more than the 650mmHG then, after treating that the interior pressure of dissolving machine rises to 1kg/cm2, open the about 22h～25h of stirring and dissolving, make concentration and be 35% stoste, continue to add thermal agitation 12 to 15h, making stoste inspissation make concentration is 35%～60%, even, bubble-free spinning solution;
D. filter together: by stoste conveyance gear pump spinning solution being sent into filter material is that 150 orders filter with the filter that 200 order stainless steels make up filter screen;
E. filter together: the spinning solution after the filtration is stored in the deaerator, carry out deaeration, being pumped into filter material by two road filter teeth wheels again is that the two road filters that 200 orders and 250 order stainless (steel) wires make up carry out the filtration of two roads, and the spinning solution after the filtration directly enters spinning machine;
F. spinning: the spinning solution that enters spinning machine is pressed into filament spinning component by measuring pump, further filtering the back through 400 purposes combinations filter screen sprays in by spinneret orifice and forms slice, the slice of ejection enters spinning shaft from top to bottom, with the hot-air convection that is blown into 150 ℃～220 ℃ by the bottom, path, make the water evaporates drying and moulding in the slice, be wound up into through negative stretch, after oiling on the silk tube of up-coiler, become moisture content at 5%～10% precursor;
G. xeothermic stretching: precursor is twisted 10～100 at primary twister twist with the fingers/rice, send into hothouse then and carry out water balance, precursor after the balance enters five roller drawing machines together, and 3～10 times of drawing-offs in 170～230 ℃ hot drawing-off groove, form vinal in the contraction heat typing of in 170～230 ℃ heat treatment groove, carrying out 1%～3% through two roads, five roller drawing machines;
H. become silk to reel: the vinal after the typing on the gathering machine around to the silk tube, carry out doubling twisting at compound twister and make polyvinyl alcohol dry method long filament.
The invention has the advantages that: adopt the dry spinning technology to produce the polyvinyl alcohol filament yarn fiber, than existing technology more economically, efficiently, production cost is low, realizes producing different quality filament fibers simultaneously, and it is more extensive in the application of engineering and industrial aspect that it produces the polyvinyl alcohol filament yarn fiber.
The specific embodiment
The specific embodiment of the invention is described in detail in detail:
A kind of preparation method of polyvinyl alcohol dry spinning may further comprise the steps: a. polyvinyl alcohol washing: drop into the degree of polymerization 200～3000 in rinsing bowl, alcoholysis degree carries out twice washing at polyvinyl alcohol 400Kg～1000Kg of 50～100 with 30 times soft water; B. dehydration: the moisture content after centrifugal dehydration of the polyvinyl alcohol after the washing enters screw extruder and carries out just molten 50 ± 1%～68 ± 1%; C. dissolving: first polyvinyl alcohol after molten drops in the dissolving machine, with the air in the vavuum pump suction dissolving machine vacuum is reached and in the chuck of dissolving machine, feed the 2kg/cm2 Steam Heating more than the 650mmHG then, after treating that the interior pressure of dissolving machine rises to 1kg/cm2, open the about 22h～25h of stirring and dissolving, make concentration and be 35% stoste, continue to add thermal agitation 12 to 15h, making stoste inspissation make concentration is 35%～60%, even, bubble-free spinning solution; D. filter together: by stoste conveyance gear pump spinning solution being sent into filter material is that 150 orders filter with the filter that 200 order stainless steels make up filter screen; E. filter together: the spinning solution after the filtration is stored in the deaerator, carry out deaeration, being pumped into filter material by two road filter teeth wheels again is that the two road filters that 200 orders and 250 order stainless (steel) wires make up carry out the filtration of two roads, and the spinning solution after the filtration directly enters spinning machine; F. spinning: the spinning solution that enters spinning machine is pressed into filament spinning component by measuring pump, further filtering the back through 400 purposes combinations filter screen sprays in by spinneret orifice and forms slice, the slice of ejection enters spinning shaft from top to bottom, with the hot-air convection that is blown into 150 ℃～220 ℃ by the bottom, path, make the water evaporates drying and moulding in the slice, be wound up into through negative stretch, after oiling on the silk tube of up-coiler, become moisture content at 5%～10% precursor; G. xeothermic stretching: precursor is twisted 10～100 at primary twister twist with the fingers/rice, send into hothouse then and carry out water balance, precursor after the balance enters five roller drawing machines together, and 3～10 times of drawing-offs in 170～230 ℃ hot drawing-off groove, form vinal in the contraction heat typing of in 170～230 ℃ heat treatment groove, carrying out 1%～3% through two roads, five roller drawing machines; H. become silk to reel: the vinal after the typing on the gathering machine around to the silk tube, carry out doubling twisting at compound twister and make polyvinyl alcohol dry method long filament.
Claims (1)
1. the preparation method of a polyvinyl alcohol dry spinning is characterized in that: may further comprise the steps:
A. polyvinyl alcohol washing: drop into the degree of polymerization 200～3000 in rinsing bowl, alcoholysis degree carries out twice washing at polyvinyl alcohol 400Kg～1000Kg of 50～100 with 30 times soft water;
B. dehydration: the moisture content after centrifugal dehydration of the polyvinyl alcohol after the washing enters screw extruder and carries out just molten 50 ± 1%～68 ± 1%;
C. dissolving: first polyvinyl alcohol after molten drops in the dissolving machine, with the air in the vavuum pump suction dissolving machine vacuum is reached and in the chuck of dissolving machine, feed the 2kg/cm2 Steam Heating more than the 650mmHG then, after treating that the interior pressure of dissolving machine rises to 1kg/cm2, open the about 22h～25h of stirring and dissolving, make concentration and be 35% stoste, continue to add thermal agitation 12 to 15h, making stoste inspissation make concentration is 35%～60%, even, bubble-free spinning solution;
D. filter together: by stoste conveyance gear pump spinning solution being sent into filter material is that 150 orders filter with the filter that 200 order stainless steels make up filter screen;
E. filter together: the spinning solution after the filtration is stored in the deaerator, carry out deaeration, being pumped into filter material by two road filter teeth wheels again is that the two road filters that 200 orders and 250 order stainless (steel) wires make up carry out the filtration of two roads, and the spinning solution after the filtration directly enters spinning machine;
F. spinning: the spinning solution that enters spinning machine is pressed into filament spinning component by measuring pump, further filtering the back through 400 purposes combinations filter screen sprays in by spinneret orifice and forms slice, the slice of ejection enters spinning shaft from top to bottom, with the hot-air convection that is blown into 150 ℃～220 ℃ by the bottom, path, make the water evaporates drying and moulding in the slice, be wound up into through negative stretch, after oiling on the silk tube of up-coiler, become moisture content at 5%～10% precursor;
G. xeothermic stretching: precursor is twisted 10～100 at primary twister twist with the fingers/rice, send into hothouse then and carry out water balance, precursor after the balance enters five roller drawing machines together, and 3～10 times of drawing-offs in 170～230 ℃ hot drawing-off groove, form vinal in the contraction heat typing of in 170～230 ℃ heat treatment groove, carrying out 1%～3% through two roads, five roller drawing machines;
H. become silk to reel: the vinal after the typing on the gathering machine around to the silk tube, carry out doubling twisting at compound twister and make polyvinyl alcohol dry method long filament.
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| CN2013102505951A CN103290494A (en) | 2013-06-24 | 2013-06-24 | Polyving akohol dry spinning preparing method |
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| CN2013102505951A CN103290494A (en) | 2013-06-24 | 2013-06-24 | Polyving akohol dry spinning preparing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023582A (en) * | 2018-07-11 | 2018-12-18 | 安徽皖维高新材料股份有限公司 | A method of improving poly-vinyl alcohol solution spinnability |
| CN111101220A (en) * | 2018-10-26 | 2020-05-05 | 中国石油化工股份有限公司 | Sand-impregnated vinylon and method for preparing sand-impregnated vinylon by dry spinning |
| CN113215672A (en) * | 2021-03-02 | 2021-08-06 | 上海灵氟隆膜技术有限公司 | Preparation method of polytetrafluoroethylene continuous filament for fuel cell diaphragm |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4765937A (en) * | 1986-03-24 | 1988-08-23 | Biomaterials Universe, Inc. | Method of preparing high strength and modulus poly(vinyl alcohol) fibers |
| CN101260570A (en) * | 2008-04-29 | 2008-09-10 | 东华大学 | High water absorption polyvinyl alcohol fibre and preparation thereof |
-
2013
- 2013-06-24 CN CN2013102505951A patent/CN103290494A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4765937A (en) * | 1986-03-24 | 1988-08-23 | Biomaterials Universe, Inc. | Method of preparing high strength and modulus poly(vinyl alcohol) fibers |
| CN101260570A (en) * | 2008-04-29 | 2008-09-10 | 东华大学 | High water absorption polyvinyl alcohol fibre and preparation thereof |
Non-Patent Citations (6)
| Title |
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| 严建: "《维纶干法长丝试车总结》", 《合成纤维工业》 * |
| 孟志刚: "《民用维纶干法长丝新工艺的研究》", 《合成纤维工业》 * |
| 毛应鹏: "《水溶性PVA纤维及其制法》", 《合成纤维》 * |
| 水佑人等编: "《聚乙烯醇纤维手册》", 31 August 1981 * |
| 沈新元编: "《现代纺织工程 化学纤维手册》", 30 September 2008 * |
| 胡祖明等编: "《化学纤维成形机理的探索》", 31 August 2011 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023582A (en) * | 2018-07-11 | 2018-12-18 | 安徽皖维高新材料股份有限公司 | A method of improving poly-vinyl alcohol solution spinnability |
| CN111101220A (en) * | 2018-10-26 | 2020-05-05 | 中国石油化工股份有限公司 | Sand-impregnated vinylon and method for preparing sand-impregnated vinylon by dry spinning |
| CN113215672A (en) * | 2021-03-02 | 2021-08-06 | 上海灵氟隆膜技术有限公司 | Preparation method of polytetrafluoroethylene continuous filament for fuel cell diaphragm |
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Application publication date: 20130911 |