Environment-friendly degradable packaging bag and preparation method thereof

Abstract

The invention relates to the technical field of environment-friendly degradable packaging equipment, and provides an environment-friendly degradable packaging bag and a preparation method thereof. The degradable packaging bag comprises following raw materials by weight: 5 to 10 parts of polylactic acid (PLA); 60 to 70 parts of poly(butylene adipate / terephthalate) (PBAT); 25-30 parts of corn starch; and 0.1 to 0.3 part of a cross-linking agent. The preparation method further comprises the following steps: 1, drying prepared materials; 2, stirring and mixing; 3, hot melting and drying; 4, performing film blowing forming; 5, cutting and making bags. According to the degradable packaging bag, the defects in the prior art are overcome, the design is reasonable, the structure is compact, the problems that an existing degradable packaging bag is complex and tedious in manufacturing process, contains non-degradable materials and is poor in degradable effect are solved, all the adopted raw materials are degradable; by adding the cross-linking agent, the compatibility effect of all the raw materials is improved, and product performance is improved. A simple preparation process is adopted, the processing is simple, and the packaging material can be widely applied to disposable packaging of supermarkets or shops.

Description

technical field [0001] The invention relates to the technical field of environmentally friendly degradable packaging equipment, in particular to an environmentally friendly degradable packaging bag and a preparation method thereof. Background technique [0002] Because plastic bags have the characteristics of high strength, light weight, corrosion resistance, and low price, people often use plastic bags to hold items in their daily lives. However, while the application of plastic bags brings great convenience to people, it also brings serious negative effects. In addition to degrading most of the discarded plastic bags under special conditions, their light and biodegradation speeds in the natural environment Very slowly, it may take hundreds of years to completely disappear. A large number of waste plastic bags after use cannot be automatically degraded, and long-term residues in the natural environment can cause serious environmental pollution, which not only affects the e...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides an environmentally friendly degradable packaging bag and its preparation method, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and solves the problem of the existing "degradable" packaging bags. The production process is complicated and cumbersome, it contains some non-degradable materials, and the degradable effect is poor. The raw materials used in the present invention are all degradable. performance, while using a simple preparation process, simple processing, and can be widely used in disposable packaging in supermarkets or stores