A naturally degradable vacuum-sealed plastic bag

Abstract

The invention discloses a naturally degradable vacuum-sealed plastic bag. The vacuum-sealed plastic bag is composed of several layers of film layers, and at least one of the several layers of film layers uses a degradation-promoting material D2W. Several layers of film materials contain polyethylene, and according to mass percentage, the added amount of the degradation-promoting material is 5% of the polyethylene; Low-density polyethylene and metallocene linear low-density polyethylene polyethylene materials are compounded to form different film layers, which can ensure that the comprehensive performance of the sealed plastic bag meets the requirements of food packaging; and add degradation-promoting materials to promote vacuum sealing. The bag is oxidatively degraded in the natural environment without secondary pollution, and its preparation process is simple, which generally solves the problems of difficult natural degradation of plastic products, low environmental protection, affecting human health, and high production costs.

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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