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Modified waste polyethylene with excellent aging resistance

A waste polyethylene and anti-aging technology, which is applied in the field of new materials, can solve the problems of poor aging resistance of recycled plastics and cannot meet the needs of the market, so as to improve the aging resistance, comprehensive mechanical properties, and heat resistance. Effect

Inactive Publication Date: 2018-12-11
JIESHOU HUAYUAN PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the regenerated plastics of waste polyethylene bottle caps utilized by existing methods have poor aging resistance and cannot meet the needs of the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of modified waste polyethylene with good aging resistance is prepared by the following steps:

[0024] (1) Add the recovered waste polyethylene to a sulfuric acid tank and soak for 2.5 hours, then take it out, rinse with clean water for 3 minutes, and drain naturally;

[0025] (2) adding the waste polyethylene obtained above into the crushing box for crushing to obtain hard plastic;

[0026] (3) After mixing the hard plastic obtained above with the rare earth cerium-doped wollastonite and the coupling agent in a mass ratio of 100:6:0.5, add them to the twin-screw extruder, and carry out the process through the twin-screw extruder. Granulating to obtain modified waste polyethylene plastic granules with good aging resistance.

[0027] Further, the preparation method of the rare earth cerium doped wollastonite is:

[0028] (1) Preheat the calcium salt solution and silicate solution with a concentration of 0.5 mol / L to 80°C respectively, and keep it warm for 15 min...

Embodiment 2

[0039] A kind of modified waste polyethylene with good aging resistance is prepared by the following steps:

[0040] (1) Add the recovered waste polyethylene into a sulfuric acid tank and soak for 3 hours, then take it out, rinse with clear water for 5 minutes, and drain naturally;

[0041] (2) adding the waste polyethylene obtained above into the crushing box for crushing to obtain hard plastic;

[0042] (3) After mixing the hard plastic obtained above with the rare earth cerium-doped wollastonite and the coupling agent in a mass ratio of 100:9:0.8, add them to the twin-screw extruder, and carry out the process through the twin-screw extruder. Granulating to obtain modified waste polyethylene plastic granules with good aging resistance.

[0043] Further, the preparation method of the rare earth cerium doped wollastonite is:

[0044] (1) Preheat the calcium salt solution and silicate solution with a concentration of 0.5 mol / L to 80°C respectively, and keep it warm for 15 min...

Embodiment 3

[0055] A kind of modified waste polyethylene with good aging resistance is prepared by the following steps:

[0056] (1) Add the recovered waste polyethylene to a sulfuric acid tank and soak for 2.8 hours, then take it out, rinse with water for 4 minutes, and drain naturally;

[0057] (2) adding the waste polyethylene obtained above into the crushing box for crushing to obtain hard plastic;

[0058] (3) After mixing the hard plastic obtained above with the rare earth cerium-doped wollastonite and the coupling agent in a mass ratio of 100:8:0.6, add them to the twin-screw extruder, and carry out the process through the twin-screw extruder. Granulating to obtain modified waste polyethylene plastic granules with good aging resistance.

[0059] Further, the preparation method of the rare earth cerium doped wollastonite is:

[0060] (1) Preheat the calcium salt solution and silicate solution with a concentration of 0.5 mol / L to 80°C respectively, and keep it warm for 15 minutes;

...

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Abstract

The invention discloses modified waste polyethylene with excellent aging resistance. The modified waste polyethylene is prepared by the following steps: (1) adding waste polyethylene into a sulfuric acid tank for soaking, and taking out the waste polyethylene; (2) adding the waste polyethylene into a crushing box, and crushing to obtain rigid plastics; and (3) uniformly mixing the rigid plastics with rare earth cerium doped wollastonite and a coupling agent, adding the mixture into a twin-screw extruder, and granulating by the twin-screw extruder, thereby obtaining the modified waste polyethylene particles with excellent aging resistance. According to the method disclosed by the invention, the coupling agent is added into the mixed system, so that the surface of the rare earth cerium dopedwollastonite is organized to a certain degree. In the system, the rare earth cerium doped wollastonite is unstable in surface structure, agglomeration easily occurs, and after the surface organizingtreatment, the agglomeration phenomenon can be effectively avoided, and the wollastonite is stably dispersed.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a modified waste polyethylene with good aging resistance. Background technique [0002] With the rapid development of the plastics industry, polyethylene, as a general-purpose plastic, is widely used in daily necessities, construction, automobile manufacturing and other fields. Especially in the field of bottle caps, it is widely used. However, with the expansion of polyethylene application fields and the increase in usage, waste polyethylene bottle caps are also increasing day by day. Due to the aging and degradation of waste polyethylene, its physical properties are far inferior to that of virgin polyethylene, and its application is also greatly limited, and can only be used to make low-performance products. If it is not applied, it will waste resources and cause great pollution to the environment. The recycling of waste polyethylene is conducive to the sus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/02C08K3/34C08K5/54
CPCC08K3/34C08K5/54C08K9/02C08L2201/08C08L2205/24C08L2207/20C08L23/06
Inventor 朱同义
Owner JIESHOU HUAYUAN PLASTIC PROD
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