As the global climate problem is becoming more and more serious, the marine ecological environment is gradually deteriorating. China, Europe and the United States have begun to restrict the use of "white plastic" on a large scale. We all know that food packaging is an essential part of the food supply chain. However, with the further escalation of the "Plastic Restriction Order", food packaging produced by traditional plastics has gradually been restricted by some countries. The development of degradable food packaging materials to replace traditional plastic packaging and reduce white pollution has become the primary task in the field of food packaging.
Advantages of PLA
As a typical representative of bio-based degradable plastics, PLA resin particles use natural lactic acid as the main raw material, have high elastic modulus, high scratch resistance, very good printability, and have obtained food contact approval, and Fat and alcohol resistant. Even if it is buried on the spot, it can be degraded by microorganisms in the soil after one year.
It is decomposed into carbon dioxide and water, which has good environmental and social benefits.
Disadvantages of PLA
Despite the obvious advantages of PLA, PLA has not been overly favored by the mass market due to rising costs and limitations in some properties (slow crystallization rate, brittleness, low melt strength, etc.). Only by further improving product performance and reducing production costs can PLA products be widely used.
Foaming is an effective method for the low-cost use of PLA. The foaming method can greatly reduce the weight of biodegradable products, thereby reducing costs, and at the same time improving the heat resistance and flexibility of the product.
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