Manufacturing method of high strength polyethylene fiber

A technology of high-strength polyethylene and its manufacturing method, applied in the direction of single-component polyolefin rayon, dry spinning, etc., can solve the problems of not describing the drying method and process in detail, achieve economical and efficient solvent recovery, and facilitate industrial production , The effect of shortening the process flow

Inactive Publication Date: 2007-02-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0008] For the 01123737.6 patent application, the patent mainly obtains moderate macromolecular entanglement points by adopting longitudinal stretching rheology and matching of various parameters. The high-strength polyethylene fibers with extended chain structure are obtained, and the volatilization and drying of the solvent in the jelly filaments is an existing technology, so the drying method and process are not specifically described

Method used

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  • Manufacturing method of high strength polyethylene fiber

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Experimental program
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Effect test

Embodiment 1

[0045] The selected molecular weight is 1×10 6 200 grams of ultra-high molecular weight polyethylene, put it and 800 grams of decahydronaphthalene solvent (industrial grade, B.P185~195 ℃) into the stainless steel reaction kettle, start stirring, heat to 60 ℃, swell for 1.5 hours, and then The screw extruder dissolves, the aspect ratio of the twin-screw extruder is 30 / 1, the screw speed is 60r / min, the temperature of the screw dissolving section is 180°C, and the spinning stock solution with a concentration of 20% is formed; (Aspect ratio of 10 / 1, pore diameter of 1mm) is extruded at a rate of 1m / min, stretched longitudinally through a first temperature-controlled zone with a length of 20cm (the temperature of the inner central zone is 150°C), and the heating method is Electric heating, the stretching ratio is 10 times, and then through the second temperature control zone with a length of 3m (the temperature of the inner central zone is 60°C), solidification is carried out to f...

Embodiment 2

[0047] The selected molecular weight is 3×10 6 80 grams of ultra-high molecular weight polyethylene, put it and 920 grams of decahydronaphthalene solvent (industrial grade, B.P185 ~ 195 ℃) into the stainless steel reaction kettle, start stirring, heat to 90 ℃, swell for 2 hours, and then double- The screw extruder is plasticized and dissolved, the length-to-diameter ratio of the twin-screw extruder is 40 / 1, the screw speed is 50r / min, and the temperature of the screw dissolution section is 170°C to form a spinning stock solution with a concentration of 8%. The wire hole (aspect ratio of 15 / 1, hole diameter of 0.8mm) is extruded at a rate of 3m / min, and then stretched longitudinally through a first temperature-controlled zone (inner central zone temperature of 200°C) with a length of 30cm. Stretching, the heating method is electric heating, the stretching ratio is 5 times (the stretching speed is 15m / min), and then it is cured through the second temperature control zone with a ...

Embodiment 3

[0049] The selected molecular weight is 5×10 6 50 grams of ultra-high molecular weight polyethylene, and 950 grams of decahydronaphthalene solvent (industrial grade, B.P185 ~ 195 ℃) into the stainless steel reactor, start stirring, heated to 100 ℃, swelling for 2.5 hours, and then double The screw extruder is plasticized and dissolved, the length-to-diameter ratio of the twin-screw extruder is 50 / 1, the screw speed is 30r / min, and the temperature of the screw dissolution section is 160°C to form a spinning stock solution with a concentration of 5%. Silk holes (aspect ratio of 25 / 1, hole diameter of 0.9mm) are extruded at a rate of 0.5m / min, and stretched longitudinally through a first temperature-controlled zone with a length of 40cm (inner central zone temperature is 220°C) , the heat sleeve is heated by high-temperature biphenyl, and the stretching ratio is 30 times, and then it is solidified through the second temperature control zone (the inner central zone temperature is ...

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Abstract

A high-strength polyethene fibre with high breaking strength (15-45 g / d) and modulus (500-1500 g / d) is prepared from ultrahigh-molecular polyethene solution through dry spinning by spinneret, longitudinally drafting and solidifying.

Description

technical field [0001] The invention relates to a method for manufacturing high-strength polyethylene fibers. Background technique [0002] At present, ultra-high molecular weight polyethylene, carbon fiber and aramid fiber are collectively referred to as three high-performance fiber materials in the world. Among them, ultra-high molecular weight polyethylene fiber has the characteristics of high strength, high modulus and low density. It has shown great advantages in materials, played an extremely important role in modern warfare and defense equipment, aerospace and aviation, and has been more and more widely used in civilian fields. [0003] At present, high-performance polyethylene fibers are mostly prepared by gel spinning-ultra-double thermal stretching process. This method first dissolves ultra-high molecular weight polyethylene with a solvent to make a spinning solution, so that the flexible macromolecular chain is diluted by the solvent. Excessive entanglement is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/04D01D5/04
Inventor 金小芳张琦张彩霞林相来王颢毕英华马彦林华体孙玉山李启明
Owner CHINA PETROLEUM & CHEM CORP
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