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Dry-method spinning technique for preparing super high molecular weight polyethylene fibre

A technology of ultra-high molecular weight and polyethylene fiber, which is applied in the direction of single-component polyolefin artificial filament, dry spinning method, fiber treatment, etc., and can solve the problems of high production cost and high sealing efficiency requirements

Inactive Publication Date: 2008-03-26
BEIJING TEX STRONG NEW MATERIAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of decahydronaphthalene technology requires high airtightness of the system and efficiency of the recovery system, and high production costs

Method used

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  • Dry-method spinning technique for preparing super high molecular weight polyethylene fibre
  • Dry-method spinning technique for preparing super high molecular weight polyethylene fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add polyethylene powder with a relative molecular weight of 5 million, antioxidants, flow promoters and other additives, and m-xylene into the stirring tank A. The weight of the polyethylene material accounts for 4% of the total feed, and the Irganox B225 antioxidant accounts for 0.8% of the total feed. The temperature of the stirred tank was kept at 120° C., and the stirring time of the stirred tank was 10 hours. Then the material enters the stirred tank B, and the polyethylene powder is continuously added to make it account for 7% of the total material amount. The temperature of the stirred tank is maintained at 120° C. and stirred for 5 hours. Then the material in the stirring tank B enters the twin-screw extruder, and the temperature of the twin-screw extruder is 120°C. It is extruded through the metering pump, spinning box, and spinneret, and enters the spinning tunnel. The length of the spinning tunnel was 10 cm, 8 cm of which were immersed below the surface of ...

Embodiment 2

[0052] The polyethylene powder with a relative molecular weight of 5 million and antioxidant IrganoxB215, CABOT company's CAB-O-SIL M-5P flow promoter and other additives, and 34% o-xylene, 33% m-xylene, 33% p-xylene The composed solvent is added to the stirring tank A. The weight of polyethylene accounts for 1% of the total feed, the antioxidant accounts for 0.5% of the total feed, and the flow promoter accounts for 0.1% of the total feed. The temperature of the stirred tank was kept at 90° C., and the stirring time of the stirred tank was 10 hours. Then the material enters the stirring tank B, and the polyethylene powder is continuously added, so that the polyethylene material accounts for 4.5% of the total material amount, and the temperature of the stirring tank is maintained at 90° C., and stirred for 8 hours. Then the material in the stirred tank B enters the twin-screw extruder, and the temperature of the twin-screw extruder is 125°C. It is extruded through the meteri...

Embodiment 3

[0059] Add polyethylene powder with a relative molecular weight of 5 million, additives such as Ultranox 877A antioxidant, and o-xylene into the stirring tank A. The weight of the polyethylene material accounts for 1.5% of the total feed, and the antioxidant accounts for 0.5% of the total feed. The temperature of the stirred tank was maintained at 130° C., and the stirring time of the stirred tank was 10 hours. Then the material enters the stirred tank B, and the polyethylene powder is continuously added to make it account for 4% of the total material amount. The temperature of the stirred tank is maintained at 120° C. and stirred for 5 hours. Then the material in the stirred tank B enters the twin-screw extruder, and the temperature of the twin-screw extruder is 125°C. It is extruded through the metering pump, spinning box, and spinneret, and enters the spinning tunnel. The length of the spinning tunnel was 30 cm. Nitrogen gas is passed into the spinning shaft, and the tem...

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Abstract

The present invention is dry spinning process for preparing ultrahigh molecular weight polyethylene fiber, and belongs to the field of polymer material preparing technology. The process includes: dissolving ultrahigh molecular weight polyethylene powder and assistant in xylene solvent; filtering and debubbling the solution, extruding in a screw extruder, spraying through a metering pump, spinning manifold and spinneret and solidifying to form, hot air drying to eliminate xylene from fiber, hot drafting and final winding the product. The present invention includes also condensing and adsorbing to separate xylene from N2 or CO2, reusing the separated xylene and reusing the separated N2 or CO2.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a dry spinning process using xylene as a solvent for the production of ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber, also known as high-strength and high-modulus polyethylene fiber, high-degree orientation polyethylene fiber, high-performance polyethylene fiber. Ultra-high molecular weight polyethylene fibers have the characteristics of high strength, high modulus, and high degree of orientation, and are widely used in the manufacture of bulletproof protective products, ropes, cables, and sports equipment. Ultra-high molecular weight polyethylene fiber is the commercialized high-performance fiber with the highest specific strength in the world. [0003] The relative molecular weight of the raw material polyethylene of ultra-high molecular weight polyethylene fibers m...

Claims

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Application Information

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IPC IPC(8): D01D5/04D01D1/04D01D1/10D01D10/00D01D11/00D01F6/04
Inventor 尹晔东
Owner BEIJING TEX STRONG NEW MATERIAL DEV
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