Production method of super high breaking strength chinlon 66 industrial yarn

A technology of breaking strength and production method, applied in the production field of ultra-high breaking strength nylon 66 industrial yarn, can solve problems such as failure to reach breaking strength, and achieve the effects of reducing impurity content, less wool and improving strength

Active Publication Date: 2018-05-18
SHEN MA INDUSTRY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the samples collected from the market are tested abroad, such as: the high-strength wire produced by Japan Asahi Kasei Company has a breaking strength of up to 10.1g / d; The breaking strength of the high-strength yarn produced is as high as 9.8g / d, which cannot meet the requirements of high-end users of nylon 66 industrial yarn breaking strength of more than 10.5g / d

Method used

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  • Production method of super high breaking strength chinlon 66 industrial yarn

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The production method of ultra-high breaking strength nylon 66 industrial yarn of the present invention, the detailed steps of this production method are as follows:

[0053] a. Solid-phase polymerization thickening: first, put the nylon 66 slices with a relative viscosity of 2.28 into the reaction container, and dry the nylon 66 slices with nitrogen at 160°C. The drying time is 15 hours. slice;

[0054] b. Slice melt extrusion: send the high-viscosity slice obtained in step a to a screw extruder, adjust the temperature of the screw extruder to 310° C., and melt the high-viscosity slice to obtain a melt;

[0055] c. Melt filtration metering and spinning: The melt obtained in step b is sent to the spinning box assembly through the melt pipeline. After the melt enters the spinning box assembly, it first passes through the filter screen and the first metal fiber provided in the assembly. The felt and the second metal fiber felt are filtered, and after filtration, they are...

Embodiment 2

[0069] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0070] The production method of ultra-high breaking strength nylon 66 industrial yarn of the present invention, the detailed steps of this production method are as follows:

[0071] a. Solid-phase polymerization thickening: First, put nylon 66 slices with a relative viscosity of 2.32 into the reaction container, and dry the nylon 66 slices with nitrogen at 150°C for 20 hours. After drying, a high-viscosity nylon 66 slice with a relative viscosity of 2.82 is obtained slice;

[0072] b. Slice melt extrusion: Send the high-viscosity slices obtained in step a to a screw extruder, adjust the temperature of the screw extruder to 300°C to melt the high-viscosity slices to obtain a melt;

[0073] c. Melt filtration metering and spinning: The melt obtained in step b is sent to the spinning box assembly through the melt pipeline. After the melt enters the spinning box assembly, it first passes through the fil...

Embodiment 3

[0084] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0085] The production method of ultra-high breaking strength nylon 66 industrial yarn of the present invention, the detailed steps of this production method are as follows:

[0086] a. Solid-phase polymerization thickening: First, put the nylon 66 slices with a relative viscosity of 2.40 into the reaction container, and dry the nylon 66 slices with nitrogen at 140°C for 23 hours. After drying, a high-viscosity nylon 66 slice with a relative viscosity of 2.80 slice;

[0087] b. Slice melt extrusion: send the high-viscosity slice obtained in step a to a screw extruder, adjust the temperature of the screw extruder to 315° C. to melt the high-viscosity slice to obtain a melt;

[0088] c. Melt filtration metering and spinning: The melt obtained in step b is sent to the spinning box assembly through the melt pipeline. After the melt enters the spinning box assembly, it first passes through the filter scre...

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Abstract

The invention discloses a production method of super high breaking strength chinlon 66 industrial yarn. The production method comprises the steps of firstly, conducting solid-phase polymerizing tackifying on a chinlon 66 slice to obtain a high-viscosity slice; melting the obtained high-viscosity slice to obtain a melt; delivering the melt into a spinning box assembly to be filtered and measured insequence and conducting yarn jetting through a spinneret plate arranged in the assembly; cooling and forming an obtained tow, oiling the cooled tow and conducting homogenizing through an oil homogenizer; stretching to shape the homogenized tow and finally conducting winding to obtain the super high breaking strength chinlon 66 industrial yarn. The spinning box assembly comprises a sand box and aspinning assembly shell, one end of the sand box is opened, a melt inlet is formed in the middle of the other end of the sand box, and a filter screen, metal sand, a first metal fiber felt, a distributing plate, a second metal fiber felt, a first sealing ring and the spinneret plate are arranged from the melt inlet end in sequence; a second sealing ring is arranged in the melt inlet of the sand box. The chinlon 66 industrial yarn has super high breaking strength, and the strength of the chinlon 66 industrial yarn can reach 10.80 g / d or above.

Description

1. Technical field: [0001] The invention relates to a production method of nylon 66 industrial yarn, in particular to a production method of ultra-high breaking strength nylon 66 industrial yarn. 2. Background technology: [0002] Nylon 66 industrial yarn has the characteristics of high strength, high temperature resistance and stable size. It is an excellent synthetic fiber material widely used in cord fabrics, canvases, conveyor belts and wool packaging bags. It can also be used in the fields of silk for airbags, tires, aviation tires, special tires, parachutes, military tents, conveyor belts, industrial filter cloth, ropes, safety belts and military products. [0003] Industrial nylon 66 industrial yarn is mainly used in the production of tire cord fabrics, conveyor belts, canvas, high-strength ropes and other technical fields. With the rapid development of the automobile industry in recent years, the demand for high-quality tires is also expanding. Tire users require h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/096D01D5/12D01D1/10D01D1/00C22C38/40C22C38/34
CPCC22C38/34C22C38/40D01D1/00D01D1/106D01D5/08D01D5/096D01D5/12
Inventor 武冰李东平康伟峰巩国顺郑晓广段文亮李晓辉
Owner SHEN MA INDUSTRY CO LTD
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