A cassava degradable plastic and its production process and production equipment

Abstract

The invention relates to the technical field of cassava degradable plastic as well as a process and equipment thereof, and in particular relates to a cassava degradable plastic as well as a production process and production equipment thereof. The cassava degradable plastic consists of the following components in percentage by weight: 75-91% of cassava starch, 5-20% of polyolefin, 0.5-2% of a catalyst, 0.5-2% of a coupling agent, 0.5-2% of an initiator and 1-3% of filler. The production process comprises the following steps: carrying out gelatinizing pretreatment, carrying drying pretreatment, then mixing and kneading powder at a high speed, reacting and extruding in a twin-screw extrusion reacting machine, and finally bracing, dicing, drying and sub-packaging to obtain the cassava degradable plastic. The cassava degradable plastic production equipment comprises a sieving machine for sieving the filler and a stirrer for mixing materials, and further comprises gelatinizing equipment for gelatinizing the cassava starch, a high-speed mixing and kneading machine, a twin-screw melting-extrusion reacting machine and a bracing and dicing device; the stirrer is connected to the high-speed mixing and kneading machine; the high-speed mixing and kneading machine is connected to the twin-screw melting-extrusion reacting machine; and the twin-screw melting-extrusion reacting machine is connected to the bracing and dicing device. The degradation rate can reach more than 85%.

Description

technical field [0001] The invention relates to the technical field of degradable plastics and its technology and equipment, in particular to a cassava degradable plastic and its production process and production equipment. Background technique [0002] Plastics have brought various conveniences to people's daily life, but because organic polymers are difficult to degrade, they have caused serious pollution. The "white pollution" of plastics threatens the ecological environment and is a worldwide problem. The emergence of environmentally friendly degradable plastics has pointed out the development direction for the future plastics industry. [0003] Existing degradable plastics include starch-added type, photodegradable type, and plant fiber type. Starch-added plastics have poor strength, stretchability, and light transmission, and the degradation time is difficult to control and has a short life; photodegradable plastics It is greatly affected by the weather, and it is not...

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Problems solved by technology

[0003] Existing degradable plastics include starch-added type, photodegradable type, and plant fiber type. Starch-added plastics have poor strength, stretchability, and light transmission, and the degradation time is difficult to control and has a short life; photodegradable plastics It is greatly affected by the weather, and it is not easy to degrade in dark or cloudy days; plant fiber plastics have problems such as low strength, poor wind and rain resistance, and easy breakage. Therefore, existing degradable plastic products generally have defects and are difficult to promote and apply on a large scale

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