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Molten preparation method of ultrahigh molecular weight polyethylene fiber

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of melt spinning, single-component polyolefin artificial filament, fiber chemical characteristics, etc., can solve the problem of fiber wear resistance and impact resistance decline, and nanomaterials are not easy to disperse , UHMWPE degradation and other issues, to achieve the effect of less raw material consumption, large-scale industrial production, and improved processing performance

Active Publication Date: 2014-12-31
JIANGSU LIUJIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used substances include polymers such as medium and low molecular weight polyethylene, polypropylene, polyimide, etc., such as low-density polyethylene or linear low-density polyethylene and polyolefin elastomer, PE foaming agent, and ternary Ethylene-propylene rubber is uniformly mixed to improve the fluidity of UHMWPE melt and realize melt spinning; Chinese patent CN101230501B blends UHMWPE and low-density polyethylene for melt spinning, but this method often has the defect of poor compatibility of the blend. Decreased fiber wear resistance and impact resistance
Chinese patent CN101935894A uses organic montmorillonite, and / or polymer liquid crystal, and / or organosilicon modified UHMWPE melt spinning, but the disadvantage of nanomaterials not being easy to disperse may cause stress concentration points, which is not conducive to the improvement of material performance , and the processing temperature of polymer liquid crystal needs to be as high as 250~300℃, which is easy to cause UHMWPE degradation, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. 55wt% of ultra-high molecular weight polyethylene with a molecular weight of 3 million, 40wt% of organic nano-titanium phosphate and 5wt% of antioxidant 1010 prepared by stearylamine fusion adsorption are fully mixed in a high-speed mixer, and then added to the twin-screw The modified masterbatch is obtained by mixing and granulating in the extruder. The screw temperature is 150~170°C in the feeding section, 180~220°C in the compression section, and 220~240°C in the metering section.

[0023] b. Fully mix 5wt% modified masterbatch with 94wt% ultra-high molecular weight polyethylene with a molecular weight of 3 million and 1wt% fluoroelastomer in a high-speed mixer, then add it to a twin-screw extruder for melt spinning, and cool in a water bath To obtain primary fibers, the temperature of each section of the screw is 150-170°C in the feed section, 180-220°C in the compression section, 220-240°C in the metering section, 230°C in the spinning assembly, and 10°C in the w...

Embodiment 2

[0026] a. 75wt% of ultra-high molecular weight polyethylene with a molecular weight of 500,000, 23wt% of organic nano-aluminum phosphate and 2wt% of antioxidant 1010 prepared by stearylamine fusion adsorption are fully mixed in a high-speed mixer, and then added to the twin-screw The modified masterbatch is obtained by mixing and granulating in the extruder. The screw temperature is 160~180°C in the feeding section, 190~230°C in the compression section, and 230~250°C in the metering section.

[0027] b. Fully mix 10wt% modified masterbatch with 85wt% ultra-high molecular weight polyethylene with a molecular weight of 500,000, and 5wt% fluoroelastomer in a high-speed mixer, then add it to a twin-screw extruder for melt spinning, and cool in a water bath To obtain primary fibers, the temperature of each section of the screw is 160-180°C in the feed section, 190-230°C in the compression section, 240-260°C in the metering section, 245°C in the spinning assembly, and 20°C in the wat...

Embodiment 3

[0030]a. 70wt% molecular weight is 1,500,000 ultra-high molecular weight polyethylene and 20wt% organic nano-manganese thiophosphite and 10wt% antioxidant 1010 that are prepared through stearylamine fusion adsorption are fully mixed in a high-speed mixer, and then Add it into a twin-screw extruder for mixing and granulation to obtain modified masterbatch. The screw temperature is 170-190°C in the feeding section, 190-220°C in the compression section, and 220-250°C in the metering section.

[0031] b. Fully mix 7.5wt% modified masterbatch with 92wt% ultra-high molecular weight polyethylene with a molecular weight of 1.5 million, and 0.5wt% fluoroelastomer in a high-speed mixer, and then add it to a twin-screw extruder for melt spinning. The primary fiber is obtained by cooling in a water bath. The temperature of each section of the screw is 170-190°C in the feed section, 190-220°C in the compression section, 220-240°C in the metering section, 230°C in the spinning assembly, and ...

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Abstract

The invention relates to a molten preparation method of ultrahigh molecular weight polyethylene fiber, and the molten preparation method is characterized by comprising the following steps: a. ultrahigh molecular weight polyethylene, internal modifier organic nano phosphate, and an antioxidant are fully mixed in a high speed mixer, then are added into a twin screw extruder for mixing and granulating to obtain modified masterbatch, the screw the temperature is 150 to 250 DEG C; b. the modified masterbatch, the ultra high molecular weight polyethylene and an external modifier fluorine elastomer are fully mixed in a high-speed mixer, then added into the twin screw extruder for melt spinning, and are cooled in water bath to obtain nascent fiber, the screw segment temperature is 150 to 260 DEG C, the water bath temperature is 5-20 DEG C; and c. the nascent fiber is processed by 3-stage stretching at 80 to 150 DEG C, and the total stretching ratio is 10-20 times.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl alcohol fiber, in particular to a melting preparation method of ultra-high molecular weight polyethylene fiber. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber, carbon fiber and aramid fiber are also known as the three major high-tech fibers in the world today. They are spun from UHMWPE with a molecular weight of 1 million to 5 million. Low temperature, impact resistance, wear resistance, ultraviolet radiation resistance and many other excellent properties are widely used in modern warfare, aviation, aerospace, national defense equipment, ship ropes and other fields. At present, the industrialized spinning of UHMWPE fibers generally adopts the gel spinning method. This method has a high degree of industrialization at home and abroad and mature technology, and is suitable for the production of ultra-high-strength high-modulus fibers. It is used in high-end ...

Claims

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Application Information

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IPC IPC(8): D01F6/46D01F1/10D01D5/098
Inventor 郭子贤刘伟昆王新鹏
Owner JIANGSU LIUJIA TECH CO LTD
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