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Draft process and equipment thereof for polyethylene fibres with superhigh molecular weight

A polyethylene fiber and ultra-high molecular weight technology, which is applied in the field of thermal drawing process methods and equipment, can solve the problem of not proposing the structure of the drawing equipment, and achieve the effects of reducing wool, improving production capacity, and increasing the speed of wire feeding.

Active Publication Date: 2012-01-18
北京威亚特装技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But did not propose a specific drafting equipment structure

Method used

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  • Draft process and equipment thereof for polyethylene fibres with superhigh molecular weight
  • Draft process and equipment thereof for polyethylene fibres with superhigh molecular weight
  • Draft process and equipment thereof for polyethylene fibres with superhigh molecular weight

Examples

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preparation example Construction

[0031] The hot drawing equipment and method for preparing ultra-high molecular weight polyethylene fibers proposed by the present invention are described in detail as follows with reference to the drawings and embodiments:

[0032] The present invention proposes a hot drawing process method for ultra-high molecular weight polyethylene fibers, which is characterized in that: the method includes performing multi-stage continuous drawing operations on the fibers after drying, and the airflow direction of the fiber heating zone and the fiber movement The direction is the same; the temperature increases step by step, and the draft ratio decreases step by step. The ratio of the draft ratio of the subsequent stage of hot drafting to that of the previous stage of hot drafting is 0.6~0.98, and the inlet and outlet of each stage The ratio of the linear velocity at the end is 1:1.02~3; the gas temperature in the fiber heating zone is 125℃~150℃.

[0033] The present invention also proposes a h...

Embodiment 1

[0054] The dried fiber enters the first-stage drafting machine with a line speed of 25m / min, then enters the first-stage hot-drawing hot box with a temperature of 135℃, and then enters the second-stage drafting machine with a line speed of 25m / min. 31m / min. Then enter the second-stage hot-drawing hot box, the temperature of the hot-box is 138℃, and then enter the third-stage drafting machine, the line speed is 35m / min. Enter the third-stage hot-drawing hot box, the temperature of the hot-box is 145℃, and then enter the fourth-stage drafting machine, the line speed is 38m / min.

[0055] The length of the drafting hot box is 4.5 meters and it is heated by induction. The first-stage drafting machine and the first-stage drafting hot box are both located in the sealing cover. The upper part of the sealing cover is provided with an air outlet and a fan is installed. The air volume of the fan is not less than 1 cubic meter / sec. An inert gas inlet is installed at the lower part of the s...

Embodiment 2

[0057] The dried fiber enters the first-stage drafting machine with a line speed of 27m / min, then enters the first-stage hot-drawing hot box with a temperature of 138℃, and then enters the second-stage drafting machine with a line speed of 38m / min. Then enter the second-stage hot-drawing hot box, the temperature of the hot-box is 139℃, and then enter the third-stage drafting machine, the line speed is 47m / min. Enter the third-stage hot drawing hot box, the temperature of the hot box is 145℃, then enter the fourth-stage drafting machine, the linear speed is 54m / min, and then enter the fourth-stage drawing hot box, the hot box temperature is 147℃, Finally, it passes through the fifth-stage drafting machine with a linear speed of 60m / min. Finally, it is wound into a finished product. The length of the drafting hot box is 5 meters.

[0058] The drafting hot box adopts induction heating. The first-stage drafting machine and the first-stage drafting hot box are both located in the ...

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Abstract

The invention relates to a thermal draft process and equipment thereof for polyethylene fibres with superhigh molecular weight, belonging to the field of producing high molecular materials. The method comprises the following steps of: carrying out multistage continuous drafting operation on dried fibres, wherein the airflow direction of a fibre heating zone is identical with the direction of movement of the fibres; and gradually raising the temperature, and gradually reducing the drafting multiplying factor. The equipment has the structure that each stage drafting thermal case is divided intoa lower-layer gas heating zone and an upper-layer fibre heating zone, the upper layer and the lower layer are respectively provided with an annular inert gas passage, and each drafting thermal case heats inert gases by adopting the electrical inductance mode. The invention not only can effectively reduce the bad phenomena, such as broken filaments, filament breakage, and the like to increase the product quality, and can also increase the filament feeding speed and the production capacity on the basis of maintaining the total drafting multiplying factor.

Description

Technical field [0001] The invention belongs to the field of polymer material manufacturing, and particularly relates to a thermal drawing process method and equipment in the production process of ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber, also known as high-strength high-modulus polyethylene fiber, high-orientation polyethylene fiber, and high-performance polyethylene fiber. Ultra-high molecular weight polyethylene fiber has high strength, high modulus, and high degree of orientation. It is widely used in the manufacture of bulletproof protective equipment, ropes, cables, fishing nets, and sports equipment. UHMWPE fiber is currently the commercialized high-performance fiber with the highest specific strength. [0003] In 1979, Smith and Lemstra of the Dutch DSM company invented the process of gel spinning to produce ultra-high molecular weight polyethylene fibers, and obtained British patents GB20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02J1/22D02J13/00
Inventor 谭琳尹晔东
Owner 北京威亚特装技术有限公司
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