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Degradable modified polyethylene plastic for packaging and preparation method thereof

A technology of polyethylene plastic and polyethylene, which is applied in the field of degradable modified polyethylene plastic for packaging and its preparation, can solve the problems of ineffective degradation and other problems, and achieve the goal of improving degradable performance, stable performance, and good gas barrier property Effect

Inactive Publication Date: 2016-09-28
湖北华源包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the existing plastics can be well degraded into fragments in the exposed environment, urban garbage tends to be landfilled. These degraded garbage fragments are buried in garbage or soil, and the degradation effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of degradable modified polyethylene plastic for packaging, comprising the following steps:

[0021] (1) Preparation of modified polyethylene: by weight, weigh 40 parts of polyethylene, 8 parts of EVA (ethylene-vinyl acetate copolymer), 10 parts of hydroxypropyl cellulose, 4 parts of glutaraldehyde, Add 4 parts of blue polysaccharide and 12 parts of modified starch into 20% glycerin aqueous solution, wherein the glycerin aqueous solution is 40 parts; stir evenly under the conditions of temperature 70 ℃ and pH 8.5 to make a paste, and paste Put the mixture into a high-pressure reactor and react at 2.0MPa and 120°C for 80 minutes. After the reaction, modified polyethylene can be prepared;

[0022] (2) Preparation of degradable modified polyethylene plastic: by weight, weigh 60 parts of modified polyethylene, 20 parts of polyvinyl alcohol, 20 parts of starch, 6 parts of dicumyl peroxide, γ-glycidol 5 parts of oxypropyltrimethoxysiloxane, 4 parts of ste...

Embodiment 2

[0024] A preparation method of degradable modified polyethylene plastic for packaging, comprising the following steps:

[0025] (1) Preparation of modified polyethylene: by weight, weigh 30 parts of polyethylene, 6 parts of EVA (ethylene-vinyl acetate copolymer), 8 parts of hydroxypropyl cellulose, 2 parts of glutaraldehyde, Add 3 parts of blue polysaccharide and 10 parts of modified starch into 15% glycerol aqueous solution by volume fraction, wherein 35 parts of glycerin aqueous solution; stir evenly under the conditions of temperature 60 ℃ and pH 8.0 to make a paste, and paste Put the mixture into a high-pressure reactor and react at 1.2MPa and 110°C for 60 minutes. After the reaction, modified polyethylene can be prepared;

[0026] (2) Preparation of degradable modified polyethylene plastic: by weight, weigh 50 parts of modified polyethylene, 15 parts of polyvinyl alcohol, 15 parts of starch, 5 parts of dicumyl peroxide, γ-glycidol 4 parts of oxypropyltrimethoxysiloxane, ...

Embodiment 3

[0028] A preparation method of degradable modified polyethylene plastic for packaging, comprising the following steps:

[0029] (1) Preparation of modified polyethylene: by weight, weigh 50 parts of polyethylene, 10 parts of EVA (ethylene-vinyl acetate copolymer), 12 parts of hydroxypropyl cellulose, 5 parts of glutaraldehyde, and Add 6 parts of blue polysaccharide and 15 parts of modified starch into 25% glycerol aqueous solution, wherein 45 parts of glycerin aqueous solution; stir evenly under the conditions of temperature 80 ℃ and pH 9.0 to make a paste, and paste The mixture is put into a high-pressure reactor, and reacted at 2.5MPa and 150°C for 90 minutes, and the modified polyethylene can be obtained after the reaction is completed;

[0030] (2) Preparation of degradable modified polyethylene plastic: by weight, weigh 70 parts of modified polyethylene, 25 parts of polyvinyl alcohol, 25 parts of starch, 8 parts of dicumyl peroxide, γ-glycidol 6 parts of oxypropyltrimeth...

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Abstract

The invention provides a preparation method of degradable modified polyethylene plastic for packaging and belongs to the field of plastic, in particular to the preparation method of the degradable modified polyethylene plastic. The preparation method mainly includes the steps that under a high pressure condition, modified starch, EVA, hydroxy propyl cellulose and Pulullan are utilized to prepare modified polyethylene, then the modified polyethylene is added to a mixture of polyethylene alcohol, starch, dicumyl peroxide, a silane coupling agent and octodecane amide, and the degradable modified polyethylene plastic is prepared in a mixed mode in a twin-screw extruder at a high temperature. A prepared polyethylene plastic product has extremely good transparency and glossiness, is free of dust collection, free of static electricity, good in printing adaptability, high in tensile strength and elongation, good in wear resistance, extremely good in air barrier property and fragrance maintenance, excellent in water resistance and degradability and particularly suitable for being used for packaging materials.

Description

technical field [0001] The invention relates to a packaging material and a preparation method thereof, in particular to a degradable modified polyethylene plastic for packaging and a preparation method thereof. Background technique [0002] In the packaging industry, film materials prepared from polymer materials are widely used, and are widely used in packaging bags and boxes. There are also many types of film materials, and composite film materials prepared from different materials also have different functions and properties. [0003] Due to its light weight and non-toxicity, polyethylene has the advantages of excellent dielectric properties, chemical stability and corrosion resistance, and it is cheap and easy to form and process, so it can be widely used in the packaging industry. With the continuous development of science and technology, higher requirements are put forward for the performance of polyethylene materials, and it is hoped that it will have more excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L1/28C08L5/00C08L3/02C08L3/04C08L29/04C08K5/00
CPCC08L23/06C08L2201/06C08L2201/08C08L2201/10C08L2205/035C08L23/0853C08L1/284C08L5/00C08L3/02C08L3/04C08L29/04C08K5/00
Inventor 党令军白林涛任彦平
Owner 湖北华源包装有限公司
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