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Method for preparing PA6 reinforcing material from waste fishing net

A technology for reinforcing materials and fishing nets, which is applied in the field of preparing PA6 reinforcing materials from discarded fishing nets, which can solve the problems of poor performance, difficult degradation, environmental pollution, etc., and achieve the effects of improving mechanical properties, realizing recycling, and simple operation methods

Inactive Publication Date: 2017-12-01
CHAOHU LOTUS FISHING NET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main varieties of polyamide fiber are polyamide 6 fiber and polyamide 66 fiber, which account for 98% of the total amount of PA fiber. During the production process of PA fiber and its products, a certain amount of waste will be generated. With the expansion of the application of PA fiber and people's With the improvement of living standards, there are more and more PA fiber wastes. Due to the stable chemical properties of PA fibers, it is difficult to degrade under natural conditions, which brings environmental pollution and waste of resources. The recycling of waste PA fibers is mainly for the collection Identify, separate, crush, and dry the waste PA fibers obtained, and recycle them by physical recycling and chemical recycling methods. For those that do not meet the recycling conditions, energy recovery is adopted. Among them, waste fishing nets are the main pollutants in marine plastic residues, and fishing nets are mainly Made of PA6, PA66, and high-density polyethylene materials, it is not easy to degrade. At the same time, when the discarded fishing nets are in use, they are soaked in seawater for a long time, and they are exposed to external sunlight, salt, microorganisms, etc., and the molecular chains are degraded and broken to varying degrees. , resulting in poor performance, therefore, it is necessary to recycle discarded fishing nets after corresponding treatment

Method used

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  • Method for preparing PA6 reinforcing material from waste fishing net
  • Method for preparing PA6 reinforcing material from waste fishing net

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A method for preparing PA6 reinforced material from discarded fishing nets, comprising the following steps:

[0015] (1) Discarded fishing nets that have been used in the ocean for more than 3 years are mixed with sodium nitrate and potassium carbonate at a weight ratio of 1:2 as a catalyst, and treated at a pressure of 5.1Pa and a temperature of 240-260°C for 35- 40 minutes, standby; the main materials of the discarded fishing nets are PA6, PA66, high-density polyethylene;

[0016] (2) Put the above-mentioned treated materials into brine with a mass concentration of 18% equivalent to 5 times its weight, stir at a speed of 250 rpm for 15 minutes, then let it stand for 2.5 hours, take out the floating materials, and place them in flowing water Rinse for 12 minutes, drain the water, and then dry it with far-infrared rays with a wavelength of 12 μm at a temperature of 78°C until the moisture content is 5.8%;

[0017] (3) In parts by weight, take 20 parts of the above-ment...

Embodiment 2

[0021] A method for preparing PA6 reinforced material from discarded fishing nets, comprising the following steps:

[0022] (1) Discarded fishing nets that have been used in the ocean for more than 3 years are mixed with sodium nitrate and potassium carbonate at a weight ratio of 1:2 as a catalyst, and treated at a pressure of 5.06Pa and a temperature of 260°C for 35 minutes. ; The main materials of the discarded fishing nets are PA6, PA66, high-density polyethylene;

[0023] (2) Put the above-mentioned treated materials into brine with a mass concentration of 18% equivalent to 5 times its weight, stir at a speed of 200 rpm for 15 minutes, then let it stand for 2.5 hours, take out the floating materials, and place them in flowing water Rinse for 10 minutes, drain the water, and then dry it with far-infrared rays with a wavelength of 10 μm at a temperature of 70°C until the moisture content is 6%;

[0024] (3) In parts by weight, take 20 parts of the above-mentioned treated ma...

Embodiment 3

[0028] A method for preparing PA6 reinforced material from discarded fishing nets, comprising the following steps:

[0029] (1) Discarded fishing nets that have been used in the ocean for more than 3 years are mixed with sodium nitrate and potassium carbonate at a weight ratio of 1:2 as a catalyst, and treated for 35 minutes at a pressure of 5.14Pa and a temperature of 260°C. ; The main materials of the discarded fishing nets are PA6, PA66, high-density polyethylene;

[0030] (2) Put the above-mentioned treated materials into brine with a mass concentration of 18% equivalent to 5 times its weight, stir at a speed of 300 rpm for 10 minutes, then let it stand for 2.5 hours, take out the floating materials, and place them in flowing water Rinse for 10 minutes, drain the water, and then use far-infrared rays with a wavelength of 14 μm to dry at a temperature of 80°C until the moisture content is 6%;

[0031] (3) In parts by weight, take 20 parts of the above-mentioned treated mat...

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PUM

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Abstract

The invention belongs to the technical field of recycle and use of fishing net waste and particularly relates to a method for preparing a PA6 reinforcing material from a waste fishing net. The method comprises the steps of carrying out primary treatment and secondary treatment on the waste fishing net, and preparing the reinforcing material. Compared with the prior art, the method has the advantages that by depolymerizing the waste fishing net, the recycle rate of caprolactam reaches above 96.5%; the waste fishing net is selected and treated by virtue of saline water to remove partial impurities, and then the waste fishing net is commonly extruded together with the other raw materials to generate the PA6 reinforcing material; compared with existing PA6 materials, the mechanical performance of the PA6 reinforcing material is improved to a certain extent, the recycle and use of the resources are realized; and the operation method is simple and convenient and suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the technical field of fishing net waste recycling and utilization, and in particular relates to a method for preparing PA6 reinforcing materials from waste fishing nets. Background technique [0002] The main varieties of polyamide fiber are polyamide 6 fiber and polyamide 66 fiber, which account for 98% of the total amount of PA fiber. During the production process of PA fiber and its products, a certain amount of waste will be generated. With the expansion of the application of PA fiber and people's With the improvement of living standards, there are more and more PA fiber wastes. Due to the stable chemical properties of PA fibers, it is difficult to degrade under natural conditions, which brings environmental pollution and waste of resources. The recycling of waste PA fibers is mainly for the collection Identify, separate, crush, and dry the waste PA fibers obtained, and recycle them by physical recycling and chemical recyc...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L77/06C08L23/06C08K13/02C08K3/22C08K3/36C08K3/32C08K5/098B29C47/92B29C48/92
CPCC08L77/02B29C48/92B29C2948/92704C08K2003/2227C08K2003/323C08K2201/011C08K2201/014C08L2205/02C08L2205/025C08L2205/035C08L2207/062C08L77/06C08L23/06C08K13/02C08K3/22C08K3/36C08K3/32C08K5/098
Inventor 陈世勤
Owner CHAOHU LOTUS FISHING NET