Multi-layer co-extrusion full-degradation high-barrier packaging film and preparation method thereof

Abstract

The invention relates to a multi-layer co-extruded full-degradable high-barrier packaging film and a preparation method thereof, the packaging film is composed of five layers: the first layer is an outer protective layer A, the component of the first layer is a blend of PLA, PBAT, a carbodiimide hydrolysis-resistant agent and an anti-ultraviolet agent; the second layer is a bonding layer B, and the component of the bonding layer B is a blend of PLA and a multi-active functional group compatibilizer; the third layer is a high-barrier layer C, and the component of the high-barrier layer C is PGA; the fourth layer is a bonding layer D, and the component of the bonding layer D is a blend of PLA and a multi-active functional group compatibilizer; and the fifth layer is a heat sealing layer E, and the component of the heat sealing layer E is a blend of PLA and PCL. The multi-layer co-extrusion full-degradation high-barrier packaging film is prepared by adopting a multi-layer co-extrusion method. The multi-layer co-extrusion full-degradation high-barrier packaging film has the advantages of good weather resistance, high barrier property and slow barrier property attenuation; the shelf life of products packaged by the multi-layer co-extrusion full-degradation high-barrier packaging film can be prolonged; and the compost full degradation can be achieved, and the multi-layer co-extrusion full-degradation high-barrier packaging film is particularly suitable for the field of packaging film bags which need high barrier, are durable and meet the full degradation requirement.

Description

technical field [0001] The invention relates to a film material used for prepackaging film bags, in particular to a high-barrier fully degradable packaging material and a preparation method thereof. Background technique [0002] The loss of agricultural products and food due to the lack of high barrier packaging materials in the world accounts for about one-fifth of the total production. In my country, about 20% of the total output of fruits and vegetables is produced each year. During the transportation and storage process, the loss caused by poor barrier properties of packaging materials is about 450 billion yuan. Furthermore, precision mechanical parts, electronic parts, medicines and medical instruments, etc. should also be packaged with high-barrier packaging materials to strengthen the quality protection of these products. Therefore, the research and development of high barrier packaging materials is of great significance. [0003] When the packaging materials used i...

AI Technical Summary

Problems solved by technology

It claims that the light transmittance can exceed 91%, and the longitudinal tensile strength can reach 59.82MPa. Although it claims that the cost is low, the cost may not be low due to its high polylactic acid content; the easily hydrolyzed polyglycolide (PGA) accounts for The ratio is also quite high, and the barrier performance of the product must decay faster, and its service life is shorter

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