CN101205633A - Method for preparing porous hollow high-strength high-modulus super-high molecular weight polyethylene fibre - Google Patents
Method for preparing porous hollow high-strength high-modulus super-high molecular weight polyethylene fibre Download PDFInfo
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- CN101205633A CN101205633A CNA2006101474250A CN200610147425A CN101205633A CN 101205633 A CN101205633 A CN 101205633A CN A2006101474250 A CNA2006101474250 A CN A2006101474250A CN 200610147425 A CN200610147425 A CN 200610147425A CN 101205633 A CN101205633 A CN 101205633A
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Abstract
The invention relates to a preparation method for multiorifice hollow high relative molecular weight polyethylene fibers and belongs to the fiber preparation field, comprising the following steps: high relative molecular weight polyethylene (weight average molecular weight is over 100) is prepared into solution with concentration of 4 to 25 percent; after extrusion molding of the solution from a multiorifice mesopore spinneret provided with petty silts through a twin-screw, the solution is extracted, dried and stretched for multiple times; stretching temperature is 80 to 130 DEG C and stretching multiple is 30 to 60 times; the high strength high modulus multiorifice hollow polyethylene finished fibers are obtained finally.
Description
Background technology:
The ultra high molecular weight polyethylene fiber have other high-performance fiber incomparable mechanical property.Lower density, higher elongation at break, specific strength and specific modulus maximum, surpassed metal material, the more important thing is excellent energy absorption characteristic in addition, the fragmentation impact energy of the most suitable absorption low speed, ballistic performance is best, being a kind of desirable bullet resistant material, also being widely used in security personnel and military aspect, is present best hawser material and high-tech armament material.
Smith of Dutch DSM N. V. in 1979 and Lemstra and invented gel spinning and produced high-performance polyethylene fibres, and obtain BP GB2042414 and GB2051667.Nineteen eighty-two, the AlliedSignal company (1999 and Honeywell company amalgamation) of the U.S. also proposed the technology patent DS4413110 of the sub-weight polyethylene fiber of production superelevation of oneself.DSM N. V. has realized the production of gel spinning legal system super high molecular weight fiber industry in nineteen ninety.The key step of gel spinning manufactured superhigh molecular weight polyethylene fibers is in the world now: ultra-high molecular weight polyethylene is dissolved in first solvent is mixed with polyethylene solution, this solution is extruded by screw extruder, after the ejection of spinning manifold spinnerets, cooled and solidified becomes gelatinous fibre, go out first solvent with volatile second solvent extraction, dry ultra-drawing finally obtains finished fiber.
It is the solid poly gel spun fiber of garden shape that said method makes, at present, the patent of the production high density polyethylene (HDPE) hollow-fibre membrane that has proposed has USP4115492, USP5294338, it is thermoplasticity hollow fiber film assembly and manufacture method that USP6436319, ZL200510049263 all adopt melt spinning method, patent USP5695702 and ZL95193838, what relate to all is to filter to use hollow membrane, does not belong to high-strength high membrane fiber.
Contain in the gel spun fiber and carry out ultra-drawing again after a large amount of first solvents must be removed solvent in the fiber with second solvent extraction, just can obtain high-strength high-modulus fibre, the speed of extraction process is except that outside the Pass having with second solvent that uses and extraction process, and is also relevant with the path of solvent diffuse.The solvent of fibrous outer preferentially diffuses out from gel spun fiber in the extraction process.The difference of the longer diffusion velocity in path is bigger.See that from the fibre section wall is thicker.Difference is bigger, and form skin-core structure and more go through evil, the ultra-drawing of this uneven structure influence fiber, and then influence the mechanical property of finished fiber.
The inside and outside wall thickness of porous hollow ultra high molecular weight polyethylene fiber of the present invention is even.Shorten the fiber internal solvent greatly and diffused out the path of gel spun fiber.Improve extraction efficiency, saved extraction and use second solvent, eliminated structural inhomogeneity, further improved the mechanical property of finished fiber.
Implementation method step: comprise polyethylene powder with super-high relative molecular weight 1,000,000～6,000,000, be mixed with concentration and be 4%～25% homogeneous solution, adopt the gel spinning method, at a certain temperature through twin-screw, casing, measuring pump, disputing to the porous mesopore with tiny slit, filament plate is extruded, is extracted, dry, ultra-drawing gets high-strength and high-modulus porous hollow polyethylene fiber.Wherein poly average weight-molecular mass is at 100-600 ten thousand.Comprise the polyethylene of 4%～25% super-high relative molecular weight and 96%～75% solvent in the solution stoste, the temperature of stoste spinning is controlled at 140～260 ℃.Stoste must be by a mesopore porous spinnerets with tiny slit, and the porous number is at 3-9, the gel spun fiber that obtains 80～130 ℃ through the row extraction, the back is dry, ultra-drawing again, draw ratio is at 30～60 times.Obtain high-strength and high-modulus porous hollow polyethylene finished fiber at last.
Example 1
Ultra-high molecular weight polyethylene (relatively average molecular mass 4,500,000), dissolvant white oil is mixed with concentration and is 10% homogeneous solution and quantitatively feeds double screw extruder.Extruder diameter 25mm, L/D=45, temperature is controlled at 250 ℃.Screw extruder rotating speed 30rpm.Extrudate is measured the back from having the 3C combination mesopore spinneret orifice ejection of tiny slit through the filter casing to measuring pump.Go into water-bath then and extract dry ultra-drawing after treatment, the stretching general times is 40, the 3 hollow high-strength high-modulus polyethylene fibers that obtain, and intensity reaches 30cN/dtex, and modulus is more than 1000cN/dtex.
Example 2
Ultra-high molecular weight polyethylene (relatively average molecular mass 5,000,000), dissolvant white oil is mixed with concentration and is 8% homogeneous solution and quantitatively feeds double screw extruder.Extruder diameter 25mm, L/D=64, temperature is controlled at 240 ℃, screw extruder rotating speed 40rpm.Extrudate is measured the back from having the 7C combination mesopore spinneret orifice ejection of tiny slit through the filter casing to measuring pump, go into water-bath then and extract dry ultra-drawing after treatment, the stretching general times is 40, the 7 mesopore high-strength high-modulus polyethylene fibers that obtain, intensity reaches 30cN/dtex, and modulus is more than 1000cN/dtex.
Claims (8)
1. the preparation method of porous hollow high-strength and high-modulus ultrahigh molecular weight polyethylene fibre is characterized in that: with the polyethylene powder of super-high relative molecular weight, be dissolved in that to be mixed with concentration in the appropriate solvent be 4%～25% solution.Solution under 140～260 ℃ temperature through twin-screw, casing, measuring pump, extrude to porous hollow spray filament plate and to obtain porous hollow gel spun fiber with tiny slit, the gel spun fiber that obtains extracts, the back is dry, ultra-drawing again, 80～130 ℃ of draft temperatures, draw ratio is at 30～60 times.Obtain high-strength and high-modulus porous hollow polyethylene finished fiber at last.
2. according to claim 1: the average weight-molecular mass of ultra-high molecular weight polyethylene is 1,000,000～6,000,000.
3. according to claim 1: as to comprise the polyethylene of 4%～25% super-high relative molecular weight and 96%～75% solvent in the stoste.
4. according to claim 1: the solvent spinning temperature is 140～260 ℃.
5. according to claim 1: the tensile fiber temperature is at 80～130 ℃.
6. according to claim 1: solution is through a porous mesopore spinnerets with tiny slit, and the porous number is 3～9.
7. according to claim 1: dry back tensile fiber multiple is 30～60 times.
8. according to claim 1: porous mesopore spinnerets hole shape can be to have the C font hole combination of tiny slit and other has the combination in the hole of tiny slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101474250A CN101205633A (en) | 2006-12-18 | 2006-12-18 | Method for preparing porous hollow high-strength high-modulus super-high molecular weight polyethylene fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101474250A CN101205633A (en) | 2006-12-18 | 2006-12-18 | Method for preparing porous hollow high-strength high-modulus super-high molecular weight polyethylene fibre |
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| Publication Number | Publication Date |
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| CN101205633A true CN101205633A (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101474250A Pending CN101205633A (en) | 2006-12-18 | 2006-12-18 | Method for preparing porous hollow high-strength high-modulus super-high molecular weight polyethylene fibre |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062053A1 (en) | 2010-11-08 | 2012-05-18 | 宁波大成新材料股份有限公司 | Preparation method for ultrahigh molecular weight polyethylene fiber |
| CN109097847A (en) * | 2018-10-31 | 2018-12-28 | 盐城优和博新材料有限公司 | A kind of production method of moisture absorbing and sweat releasing high-strength high-modulus polyethylene |
-
2006
- 2006-12-18 CN CNA2006101474250A patent/CN101205633A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062053A1 (en) | 2010-11-08 | 2012-05-18 | 宁波大成新材料股份有限公司 | Preparation method for ultrahigh molecular weight polyethylene fiber |
| CN109097847A (en) * | 2018-10-31 | 2018-12-28 | 盐城优和博新材料有限公司 | A kind of production method of moisture absorbing and sweat releasing high-strength high-modulus polyethylene |
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Open date: 20080625 |