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

A technology of polyethylene fiber and ultra-high molecular weight, which is applied in the field of thermal drawing process and equipment, can solve the problems such as the structure of the drawing equipment that has not been proposed, and achieve the effects of reducing fuzz, increasing the speed of thread feeding, and improving product quality

Active Publication Date: 2010-06-23
北京威亚特装技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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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 in conjunction with the accompanying drawings and examples as follows:

[0032] The invention proposes a hot drawing method for ultra-high molecular weight polyethylene fiber, which is characterized in that: the method includes performing multi-stage continuous drawing operation on the dried fiber, the direction of airflow in the fiber heating zone and the movement of the fiber The direction is the same; the temperature increases step by step, and the draw ratio decreases step by step. The ratio of the draw ratio of the last stage of hot drawing to that of the previous stage is 0.6 to 0.98, and the inlet and outlet of each stage The ratio of line speed at the end is 1:1.02~3; the gas temperature in the fiber heating zone is 125°C~150°C.

[0033] The present invention also proposes the thermal drawing process equipme...

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°C, and then enters the second-stage drafting machine with a line speed of 31m / min. Then enter the second stage hot drawing hot box, the temperature of the hot box is 138 ℃, then enter the third stage drawing machine, the line speed is 35m / min. Enter the third stage hot drawing hot box, the temperature of the hot box is 145 ℃, then enter the fourth stage drawing machine, the line speed is 38m / min.

[0055] The drafting hot boxes are all 4.5 meters in length and are heated by induction. The first-stage drafting machine and the first-stage drafting hot box are all located in the sealed cover, and the upper part of the sealed cover is provided with an air outlet, and a fan is installed, and the air volume of the fan is not less than 1 cubic meter per second. An inert gas inlet is installed on the side lower part of...

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, and the temperature of the hot box is 138°C, 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 ℃, then enter the third stage drawing machine, the line speed is 47m / min. Enter the third stage hot drawing hot box, the temperature of the hot box is 145°C, then enter the fourth stage drawing machine, the line speed is 54m / min, and then enter the fourth stage drawing hot box, the temperature of the hot box is 147°C, Finally, it passes through the fifth-stage drafting machine with a line speed of 60m / min. Finally, it is wound and formed 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 ...

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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 into a 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 in particular relates to a hot drawing process 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 and high-modulus polyethylene fiber, high-degree orientation polyethylene fiber, high-performance polyethylene fiber. Ultra-high molecular weight polyethylene fiber has high strength, high modulus, and high degree of orientation, and is widely used in the manufacture of bulletproof protective products, ropes, cables, fishing nets, and sports equipment. Ultra-high molecular weight polyethylene fiber is the commercialized high-performance fiber with the highest specific strength. [0003] In 1979, Smith and Lemstra of DSM Company in the Netherlands invented the process of producing ultra-high molecular weight polyethylene fibers by gel spin...

Claims

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Application Information

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Patent Type & Authority Applications(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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