Method for preparing antibacterial masterbatches by using discarded and/or waste plastic as raw materials

A technology of waste plastics and antibacterial masterbatch, which is applied in the field of waste and/or waste plastics, which can solve the problems of easy loss of antibacterial properties, poor thermal stability, and increased costs, so as to improve durable antibacterial performance, enhance thermal stability, and reduce loss Effect

Active Publication Date: 2020-02-04
ANHUI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In order to solve the above-mentioned technical problems, the present invention aims at the poor thermal stability of waste and / or waste plastic recycling, the problem of increasing the cost of the process of adding fillers, the fusion of antibacterial agent components and plastics in antibacterial plastics, and the easy loss of antibacterial properties. The problem of decline, it is proposed to add antibacterial fly ash to waste and / or waste plastics, solve the thermal stability and cost problems, and obtain functional new materials that can be directly utilized in the subsequent plastics industry

Method used

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  • Method for preparing antibacterial masterbatches by using discarded and/or waste plastic as raw materials
  • Method for preparing antibacterial masterbatches by using discarded and/or waste plastic as raw materials
  • Method for preparing antibacterial masterbatches by using discarded and/or waste plastic as raw materials

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Effect test

Embodiment 1

[0051] The above-mentioned method for preparing antibacterial masterbatch with waste plastics as raw material comprises the following steps:

[0052] (1) Sorting and cleaning 100 parts of waste PE materials with a melt index of 20, and drying them at 90°C; they were firstly crushed to 20 mesh, then finely crushed to 60 mesh, and then twin-screw extruded at 150°C out to obtain waste plastic masterbatch;

[0053] (2) Add 0.75 parts of chlorinated maleic acid-modified polyethylene and 1.5 parts of paraffin to the waste plastic masterbatch obtained by extrusion as the first surface modifier, and modify it at 90°C at a speed of 1200rpm / min. properties, and then mix the obtained modified product with about 700 meshes of fly ash loaded with antibacterial agents, then add 3.5 parts of sodium tripolyphosphate and 3 parts of stearic acid as the second surface modifier, and then heat it at 140 ° C Process at a speed of 600rpm / min, the temperature during twin-screw extrusion is 170°C, th...

Embodiment 2

[0061] In embodiment 2, the fly ash loaded with antibacterial agent is the fly ash loaded with zinc oxide and quaternary ammonium salts, and its ratio is:

[0062] The weight ratio of zinc oxide and fly ash is 1:3;

[0063] The weight ratio of quaternary ammonium salts and fly ash is 1:12.

Embodiment 3

[0064] In embodiment 3, the fly ash loaded with antibacterial agent is the fly ash loaded with zinc oxide, and its ratio is:

[0065] The weight ratio of zinc oxide and fly ash is 1:3.5.

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Abstract

The invention belongs to the technical field of discarded and/or waste plastics, and particularly relates to a method for preparing antibacterial masterbatches by using discarded and/or waste plasticsas raw materials. The method includes the steps that (1) sorting, cleaning and drying of discarded and/or waste plastics are performed; through primary crushing, fine crushing and twin-screw extrusion, discarded and/or waste plastic masterbatches are obtained; and (2) a first surface modification agent is added to the discarded and/or waste plastic masterbatches, and the obtained modified discarded and/or waste plastic masterbatches are mixed with antibacterial-agent-loaded fly ash through high temperature and high speed modification, then a second surface modification agent is added, high-temperature and high-speed processing and the two-screw extrusion are performed, and the obtained masterbatches are subjected vacuum-drying at low temperature and sealed and packaged. The problems existing in the process of recycling waste are utilized, the antibacterial agent is added to the discarded and/or waste plastics to obtain antibacterial plastic masterbatches, and the antibacterial plasticmasterbatches can be conveniently added to other plastics later to make antibacterial plastics.

Description

technical field [0001] The invention belongs to the technical field of waste and / or waste plastics, and in particular relates to a method for preparing antibacterial master batches by using waste and / or waste plastics as raw materials. Background technique [0002] Waste and / or waste plastics are wastes from plastic processing enterprises or after plastic preparation and use, which can be re-granulated and reused, but due to the partial degradation during use and the thermal stability of plastics during high-temperature treatment during multiple Therefore, when recycling, it is not recommended to add too much discarded and / or waste plastics, and it is not recommended to simply granulate and reuse plastics indefinitely, which will not only affect the quality of plastic products, but also It is more likely to cause some environmental problems. [0003] Adding inorganic oxides or fly ash to plastics can increase the thermal stability of plastics. However, adding inorganic sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L27/06C08L91/06C08K13/06C08K9/12C08K7/26C08K3/22C08K3/32C08K5/09C08J3/22
CPCC08J3/226C08J2423/06C08J2423/12C08J2427/06C08K13/06C08K9/12C08K7/26C08K2003/2296C08K2003/324C08K5/09
Inventor 万祥龙李春霞王周锋王龙龙胡凯强赖声发曾飞
Owner ANHUI UNIV OF SCI & TECH
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