Vacuum sealing plastic bag capable of being naturally degraded

Abstract

The invention discloses a vacuum sealing plastic bag capable of being naturally degraded. The vacuum sealing plastic bag is formed by compounding a plurality of film layers, wherein at least one of the plurality of film layers is made of a degradation promoting material D2W, the plurality of film layers contain polyethylene, and the addition amount of the degradation promoting material is 5% of the addition amount of the polyethylene in percentage by mass. According to the invention, polyethylene materials including HDPE (high-density polyethylene), LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene) and metallocene linear low-density polyethylene are compounded to form different film layers, so the comprehensive performance of the sealing plastic bag can meet the requirements of food packaging; the degradation promoting material is added, so oxidative degradation of the vacuum sealing plastic bag in the natural environment is promoted, and secondary pollution is avoided; and preparation process is simple, and the problems that plastic products are difficult to naturally degrade, low in environmental protection property, high in production cost and the like andhave influence on human health are solved on the whole.

Description

technical field [0001] The invention relates to the field of preparation of food packaging bags, in particular to a naturally degradable vacuum-sealed plastic bag. Background technique [0002] The pollution of plastic products to the environment and the long-term damage to the earth are major challenges facing mankind. Therefore, developed countries such as Europe and the United States have successively issued regulations to reduce the use of plastics and ban plastics. Especially in the food field, there is a large demand for packaging materials every year, which consumes a lot of energy resources. Most of the packaging materials pose a serious threat to the ecological environment, and even most of the plastic products are used in the field of food packaging. Human body After eating the food, some potential hazards will be produced, and the safety performance is poor. In addition, the mechanical strength, easy large-scale processing, moisture resistance, steam resistance a...

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Problems solved by technology

Another example is the patent application number 201310420320.8, which discloses a multi-layer composite functional fresh-keeping film. According to the five-layer structure of PE / EVOH / PA / EVOH / PE, each layer is equipped with appropriate additives, and is formed by co-extrusion blow molding. Made into a multi-layer composite functional plastic wrap, but its degradability is poor

[0003] Most of the traditional vacuum plastic bags are non-degradable, and some degraded plastic bags are not effective, and the added degradable components will cause secondary pollution to the environment after decomposition, and are greatly affected by the surrounding environment, have poor stability, and even require specific Degradation can only occur under environmental conditions

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