Biodegradable plastic and preparation method thereof

Abstract

The invention relates to a biodegradable plastic and a preparation method thereof, and belongs to the technical field of plastic processing. The biodegradable plastic comprises the following raw materials in parts by weight: 16-21 parts of chitin, 2-5 parts of sodium fluosilicate, 2-5 parts of gelatin, 1-3 part(s) of calcium carbonate, 1-3 part(s) of glycerol, 18-22 parts of ultrafine starch, 1-3 part(s) of glycerin, 0.4-0.7 parts of stearic acid, 0.4-0.7 parts of oleic acid, 15-20 parts of low-density polyethylene, 15-20 parts of high-density polyethylene and 0.4-0.7 parts of acetyl acetone manganese. The preparation method comprises the following steps: heating a container to 75-85 DEG C; putting the raw materials into the container, heating the raw materials to 125-130 DEG C within 0.5-0.8 hour, and mixing and reacting for 1.5-1.8 hours at the temperature; adjusting the pH value of a reaction solution to be 5.8-6.5 by hydrochloric acid to obtain a uniformly dispersed solution; pouring the solution into a preheated mould for foaming and forming, thermalizing, and demoulding to obtain the biodegradable plastic. Compared with like products on the market, the plastic has the advantages of relatively low production price, relatively high degradation speed, no toxin materials, environmental protection and the like.

Description

technical field [0001] The invention relates to a plastic, in particular to a biodegradable plastic and a preparation method thereof, belonging to the technical field of plastic processing. Background technique [0002] For more than half a century, with the rapid development of plastics industry technology, the world's total output of plastics has exceeded 1.7×108t. Its use has penetrated into various fields of industry, agriculture, and people's lives, and it has become a national economy alongside steel, wood, and cement. The four pillar materials. However, the extensive use of plastics also brings a large amount of solid waste, especially the widespread use of disposable plastic products such as food packaging bags, beverage bottles, agricultural films, etc., leaving a large amount of solid waste in public places and In the ocean, or left in the soil layer of cultivated land, it seriously pollutes the living environment of human beings and becomes a worldwide public haz...

AI Technical Summary

Problems solved by technology

The 21st century is an era of protecting the earth's environment, and an era of increasingly tense resources and energy. In order to manage those disposable items that are large in quantity, scattered, dirty, difficult to collect, or even forced to be collected for recycling, the economic benefits are poor or ineffective. Plastic waste not only pollutes the ecological environment, but is also a great waste of resources and energy

201210404923.4 discloses a degradable plastic and its preparation method. The plastic is composed of superfine starch, superfine plant powder, synthetic degradable resin, synthetic resin, plasticizer, pro-oxidant, compatibilizer, lubricant, photosensitizer , heat-sensitive agent, and degradation control agent, it has the characteristics of complete degradation and fast degradation speed, but due to the large proportion of ultra-fine starch and ultra-fine plant powder, the production cost is relatively high, and the stability of the finished product is poor

At the same time, the same type of biodegradable plastics has a higher price and lower biodegradable utility in the current market. Therefore, the present invention develops a biodegradable plastic with affordable cost and high degradation utility to improve existing products and technologies. question