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Environment-friendly high-performance recycled plastic granule and preparation process thereof

A high-performance technology of recycled plastic particles, applied in the field of plastic processing, can solve the problems affecting the quality, agglomeration and poor compatibility of recycled plastic products in the chain extension reaction, so as to improve the agglomeration, improve compatibility, and promote uniform dispersion. Effect

Inactive Publication Date: 2020-11-03
晋江祥谦鞋材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chain extender in this application is a nano-layered inorganic particle, which is an inorganic mineral particle, which has the defect of poor compatibility with the polymer matrix, and is prone to agglomeration, which in turn affects the occurrence of chain extension reactions and recycled plastics. product quality

Method used

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  • Environment-friendly high-performance recycled plastic granule and preparation process thereof

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Effect test

preparation example Construction

[0047] The preparation process of the environmentally friendly high-performance recycled plastic particles includes the following steps:

[0048] The first step is to soak the waste polyethylene plastic in clean water, then rinse it with ethanol and acetone for 2-3 times, then rinse it with water for 2-3 times, dry it so that the moisture content is less than 0.05%, and crush it through 100 mesh Sieve to obtain pretreated waste polyethylene plastics;

[0049] The second step, add pretreated waste polyethylene, modified polyethylene, modified chitosan, crosslinking agent and additives into the double rotor continuous mixer, the rotor speed is 160-200r / min, mixing for 20-30min, and then Add the reinforcing agent and continue mixing for 8-10 minutes to obtain the premix;

[0050] In the third step, the premix obtained in the second step is directly heated and fed into the extrusion granulation equipment, and the recycled plastic granules are obtained through exhausting, pelletiz...

Embodiment 1

[0052] Modified chitosan is prepared by the following method:

[0053] S1. Weigh chitosan powder and add it to distilled water, first ultrasonic for 10min, then stir at a constant speed of 150r / min, and slowly add dimethyloctadecyl[3-(trimethoxysilyl) Propyl]ammonium chloride, after dropping, stirred at a constant speed of 150r / min for 22h at room temperature, washed the final product with distilled water and methanol for 3 times, and finally put the product into a vacuum drying oven at 60°C for 20h to obtain grafted chitosan;

[0054] Wherein, the ratio of the consumption of chitosan powder, distilled water, dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride is 1g: 110mL: 35mL;

[0055] S2. Disperse the grafted chitosan in chloroform, ultrasonicate for 8 minutes, then add 4g sodium nonylphenol polyoxyethylene ether sulfate, stir magnetically at room temperature for 22h, then add 20mL distilled water to the reaction system and continue magnetically stirring for...

Embodiment 2

[0058] Modified chitosan is prepared by the following method:

[0059] S1. Weigh chitosan powder and add it to distilled water, first ultrasonic for 15min, then stir at a constant speed of 150r / min, and slowly add dimethyloctadecyl[3-(trimethoxysilyl) Propyl]ammonium chloride, after dropping, stirred at a constant speed of 150r / min for 24h at room temperature, washed the final product with distilled water and methanol for 4 times, and finally put the product into a vacuum drying oven at 60°C for 24h to obtain grafted chitosan;

[0060] Wherein, the ratio of the consumption of chitosan powder, distilled water, dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride is 1g: 120mL: 40mL;

[0061] S2. Disperse the grafted chitosan in chloroform, first ultrasonic for 10min, then add 4g sodium nonylphenol polyoxyethylene ether sulfate, stir magnetically at room temperature for 24h, then add 20mL distilled water to the reaction system and continue magnetically stirring for 4...

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Abstract

The invention discloses an environment-friendly high-performance recycled plastic granule, which is prepared from the following raw materials in parts by weight: 50-60 parts of modified polyethylene,30-40 parts of waste polyethylene plastic, 6-9 parts of modified chitosan, 1-1.2 parts of a cross-linking agent, 0.8-1 part of a reinforcing agent and 0.2-0.3 part of an additive. The invention also discloses a preparation process of the regenerated plastic granule. According to the invention, with modified polyethylene as one of recycled plastic matrixes, the plastic granule has excellent compatibility with waste plastics, and has a chemical bonding effect with modified chitosan molecules, so that the antibacterial durability of chitosan is improved, and the mechanical strength of chitosan isenhanced; after the chitosan is modified, the modified chitosan can be uniformly dispersed in a polymer matrix, and the antibacterial property of the modified chitosan is enhanced. The invention achieves turning wastes into resourcs and satisfies the environmental protection requirement, the high-performance plastic granule with high mechanical strength and the lasting and stable antibacterial function can be obtained, so that the invention has extremely high application value in the field of plastic recycling.

Description

technical field [0001] The invention belongs to the field of plastic processing, and in particular relates to an environment-friendly high-performance regenerated plastic particle and a preparation process thereof. Background technique [0002] In recent years, with the continuous advancement of polymer synthesis technology, the plastics industry has developed rapidly, and more and more plastic products have become indispensable substances in people's lives. But at the same time, it also brought us white polluting garbage formed by a large amount of waste plastics, and brought a lot of waste of resources and pollution control costs. Compared with the development of primary resources, the recycling of waste plastics has a lower cost and can effectively reduce environmental pollution, so the recycling of waste plastics has a very broad market and potential. Recycled plastics refer to the plastic raw materials obtained after processing waste plastics through physical or chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/36C08L23/06C08L87/00C08L53/02C08L23/08C08K5/14C08F8/30C08F110/02C08G81/00C08B37/08B29B17/00B29B17/04
CPCB29B17/00B29B17/0412B29B2017/0015C08B37/003C08F8/30C08G81/00C08L23/36C08L2205/02C08L2205/035C08L2207/20C08L23/06C08L87/005C08L53/02C08L23/0815C08K5/14C08F110/02Y02W30/52Y02W30/62
Inventor 张凯莉
Owner 晋江祥谦鞋材有限公司
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