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Process for manufacturing coarse denier high-strength nylon 6 stretching industrial thread

A production process and high-strength technology, applied in the direction of melt spinning, etc., can solve problems such as insufficient spinning speed, failure to meet user requirements, improper selection of draft ratio, etc., and achieve low production cost and high production output.

Inactive Publication Date: 2004-03-31
中国石油化工股份有限公司巴陵分公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] At present, the quality of the coarse denier high-strength nylon 6 fully drawn industrial yarn produced in China is as follows: the breaking strength is 81-82CN / Tes, the breaking elongation is 23-26%, and the constant load elongation is 11.5%-12.5%. , can not meet the requirements of users, the reason is that the draft ratio is low, generally 4.8~4.95, the drafting temperature and the draft ratio of each stage are not selected properly, and the spinning speed is not enough, only 2000~2200 m / min

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Pour 400Kg of nylon 6 slices with a viscosity of 3.55, an extractable content of 0.5%, and a water content of 0.053% into the screw extruder. The temperature settings of the six heating zones of the screw extruder are: 310°C, 320°C, 320°C, 308°C, 306°C, 306°C. After the slices are melted in the screw extruder, they enter the melt pipe. The temperature of the biphenyl used for heat preservation in the melt pipe is controlled at 295°C. The melt passes through the spinning metering pump from The spinneret is sprayed at high pressure to form filaments. The speed of the metering pump is controlled at 24 rpm. The filaments are cooled and formed under the condition of side blowing at a temperature of 18°C ​​and a relative humidity of 83%, and then oiled evenly by an oiler. , for high-temperature, high-speed, high-magnification drafting, the temperature of the first pair of drawing rollers is controlled at 60°C, the temperature of the second pair of drawing rollers is controlled...

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PUM

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Abstract

A process of manufacturing fully drawn nylon6 industrial yarns with heavy denier and high strength. It is characterized in, heating and melting nylon6 chips in a screw extruder with 40í½50r / min, at 310degree Cí½320degree C, maintaining the melts in pipes by gaseous biphenyl at 295degree Cí½300degree C, the spinning nozzle ejecting the melts at high pressure through the yarn metering pump and forming threadlines, cooling threadlins and molding, fatliquoring, drafting and winding. The drafting process is divided into three sections with heat drafting. The drafting multiple factor is 4.96í½5.1, the spinning rate is 2210í½2400m / min, the viscosity of nylon6 chips is 3.5í½3.6. The produced fully drawn industrial yarns with heavy denier and high strength have the following properties: the breaking tenacity of 2100dtex / 316F is í¦86CN / tex which is at least 5CN / tex higher than the existing domestic products, the breaking extensibility is íœ23úÑ which is 1í½3úÑ smaller than the existing domestic products, the constant load extensibility is 11.5úÑ which is 1úÑ smaller than the existing domestic products, the spinning rate is 200í½ 300M / MIN higher than the existing domestic products.

Description

technical field [0001] The invention relates to a production process of coarse denier high-strength nylon 6 fully drawn industrial yarn. Background technique [0002] At present, the quality of the coarse denier high-strength nylon 6 fully drawn industrial yarn produced in China is as follows: the breaking strength is 81-82CN / Tes, the breaking elongation is 23-26%, and the constant load elongation is 11.5%-12.5%. , can not meet the user's requirements, the reason is that the draft ratio is low, generally 4.8 ~ 4.95, the draft temperature and the draft ratio of each stage are not selected properly, and the spinning speed is not enough, only 2000 ~ 2200 m / min. Contents of the invention [0003] The object of the present invention is to provide a production process of coarse denier high-strength nylon 6 fully drawn industrial yarn. [0004] The object of the present invention is achieved in the following way: Nylon 6 chips are heated and melted in a screw extruder with a rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/098
Inventor 杨峰黄彬邓向阳罗凌宇
Owner 中国石油化工股份有限公司巴陵分公司
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