Recycled composite material for enhancing modified waste polypropylene by using waste printed circuit board powder/glass fiber and preparation method of recycled composite material

Abstract

The invention discloses a recycled composite material for enhancing modified waste polypropylene by using a waste printed circuit board powder / glass fiber and a preparation method of the recycled composite material. The recycled composite material comprises the following raw materials in part by weight: 100 parts of waste polypropylene, 100-300 parts of waste printed circuit board powder, 5-15 parts of compatibilizer, 1-2 parts of antioxidant and 5-15 parts of alkali-free glass fiber. The preparation method comprises the following steps: mixing the waste polypropylene, the waste printed circuit board powder, the compatibilizer and the antioxidant according to a proportion; adding a blending material from a main feeding device of a double-screw extruder for smelting, wherein the rotating speed of a screw is 60 r / min; and adding the alkali-free glass fiber from a fourth processing area of the extruder according to a proportion and blending the alkali-free glass fiber with the smelt mixture; and carrying out extrusion, traction, cooling and particle dicing to obtain the recycled composite material of the modified waste polypropylene. According to the recycled material disclosed by the invention, the waste polypropylene can be effectively enhanced and toughened and the recycled composite material with excellent integrated performance is obtained; and in addition, the waste is fully utilized and energy economization and emission reduction are realized.

Description

technical field

[0001] The invention relates to a recycled material, especially a recycled composite material using waste circuit board powder / glass fiber to reinforce and modify waste polypropylene; the invention also relates to a preparation method of the above-mentioned recycled material. Background technique

[0002] With the rapid development of the information industry, the production of printed circuit boards is increasing rapidly. At present, my country has become the largest producer of circuit boards in the world, and its output ranks first in the world. In my country, the weight of scraps produced by circuit board manufacturers alone reaches more than 400,000 tons every year. Considering the large amount of waste electrical appliances imported each year and the waste circuit boards produced by the dismantling of scrapped electronic products in mainland China, the total amount Will reach more than 1 million tons. Therefore, environmentally friendly and reliable rec...

Examples

example 1

[0023] The waste circuit board is crushed and sieved to obtain a powder of more than 100 mesh. The metal and non-metal powders are separated by conventional electrostatic and winnowing processes, and the non-metal powders are dried for use. Mix the materials according to the following proportions: 100 parts of waste polypropylene (PP), 100 parts of waste circuit board powder, 10 parts of compatibilizer PP-g-MAH, antioxidant four [β-(3,5-di 1 part of tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol and tris(2,4-di-tert-butylphenyl) phosphite in a ratio of 1:1.

[0024] During the screw extrusion of the twin-screw extruder, as the screw speed increases, the shear force on the melt in the barrel increases, and the friction between the glass fiber and the barrel and the screw increases, resulting in a large number of fibers being twisted by the screw. , the average length of the fiber becomes smaller, but the speed is too small and the mixing effect will be affected. The c...

example 2

[0027] The preparation method and steps are the same as in Example 1, and the material ratio is changed as follows: 100 parts of waste PP, 200 parts of waste circuit board powder, 15 parts of compatibilizer PP-g-MAH, antioxidant tetrakis [β-(3,5-ditert Butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester and tris(2,4-di-tert-butylphenyl)phosphite were compounded in 2 parts at a ratio of 1:3. A quantitative 10 parts of alkali-free glass fiber was added from the fourth zone of the extruder process.

example 3

[0029] The preparation method and steps are the same as Example 1, and the material ratio is changed as follows: 100 parts of waste PP, 150 parts of waste circuit board powder, 10 parts of compatibilizer PP-g-AA, antioxidant tetrakis [β-(3,5-ditert Butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and tris (2,4-di-tert-butylphenyl) phosphite are mixed in 1 part at a ratio of 1:1. A quantitative quantity of 8 parts of alkali-free glass fibers was added from the extruder processing zone 4.

technical field

[0001] The invention relates to a recycled material, especially a recycled composite material using waste circuit board powder / glass fiber to reinforce and modify waste polypropylene; the invention also relates to a preparation method of the above-mentioned recycled material. Background technique

[0002] With the rapid development of the information industry, the production of printed circuit boards is increasing rapidly. At present, my country has become the largest producer of circuit boards in the world, and its output ranks first in the world. In my country, the weight of scraps produced by circuit board manufacturers alone reaches more than 400,000 tons every year. Considering the large amount of waste electrical appliances imported each year and the waste circuit boards produced by the dismantling of scrapped electronic products in mainland China, the total amount Will reach more than 1 million tons. Therefore, environmentally friendly and reliable rec...

Examples

example 1

[0023] The waste circuit board is crushed and sieved to obtain a powder of more than 100 mesh. The metal and non-metal powders are separated by conventional electrostatic and winnowing processes, and the non-metal powders are dried for use. Mix the materials according to the following proportions: 100 parts of waste polypropylene (PP), 100 parts of waste circuit board powder, 10 parts of compatibilizer PP-g-MAH, antioxidant four [β-(3,5-di 1 part of tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol and tris(2,4-di-tert-butylphenyl) phosphite in a ratio of 1:1.

[0024] During the screw extrusion of the twin-screw extruder, as the screw speed increases, the shear force on the melt in the barrel increases, and the friction between the glass fiber and the barrel and the screw increases, resulting in a large number of fibers being twisted by the screw. , the average length of the fiber becomes smaller, but the speed is too small and the mixing effect will be affected. The c...

example 2

[0027] The preparation method and steps are the same as in Example 1, and the material ratio is changed as follows: 100 parts of waste PP, 200 parts of waste circuit board powder, 15 parts of compatibilizer PP-g-MAH, antioxidant tetrakis [β-(3,5-ditert Butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester and tris(2,4-di-tert-butylphenyl)phosphite were compounded in 2 parts at a ratio of 1:3. A quantitative 10 parts of alkali-free glass fiber was added from the fourth zone of the extruder process.

example 3

[0029] The preparation method and steps are the same as Example 1, and the material ratio is changed as follows: 100 parts of waste PP, 150 parts of waste circuit board powder, 10 parts of compatibilizer PP-g-AA, antioxidant tetrakis [β-(3,5-ditert Butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and tris (2,4-di-tert-butylphenyl) phosphite are mixed in 1 part at a ratio of 1:1. A quantitative quantity of 8 parts of alkali-free glass fibers was added from the extruder processing zone 4.

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