With the increasing calls for protecting the environment, caring for the earth, and saving resources in the world, the international market has more and more stringent requirements for product packaging. Harmless, renewable and environmentally friendly packaging plays a pivotal role in the export trade of commodities.
Environmentally friendly packaging materials generally include reusable and renewable packaging materials, edible packaging materials, degradable materials and natural paper materials. Environmentally friendly packaging is embodied in the use of materials, less waste and energy saving, easy to recycle and reuse, and packaging waste does not cause secondary pollution. Therefore, the choice of environmentally friendly packaging materials should comply with the basic principles of harmlessness and renewable use. Although pure natural environmentally friendly packaging materials are non-toxic, they have high commercial costs and are a serious waste of earth resources. Composite environmentally friendly materials will become the mainstream of environmentally friendly packaging in the future due to their low cost and easy recycling.
The packaging should be easy to reuse or recycle. This is a practical step in the development of green packaging materials at this stage, and it is an active waste recovery treatment method. The single-material packaging bags currently used can be quickly recycled and reused, or renewable resources, no longer rely on petroleum extraction but renewable materials extracted from plants (such as corn, sugar cane), so as to achieve a green, environmentally-friendly and sustainable development path .
In order to reduce the environmental damage of packaging waste, China put forward the concept of "green packaging" as early as 10 years ago. Green packaging has two meanings, namely, environmental protection and capital regeneration, in detail:
Packaging reduction. That is to say, the amount of packaging should be reduced as much as possible under the condition of satisfactory maintenance, convenience, sales and other functions.
Packaging waste can be degraded and decomposed, and does not constitute permanent waste. The world is studying degradable plastics to solve the severe environmental problems caused by the inability of plastics to degrade. The principle of degradation is to split, degrade and restore plastics in the natural environment through the effects of microorganisms in the soil and water or through the effects of ultraviolet rays in the sun, and ultimately enter the ecological environment from the beginning in a non-toxic way and return to nature.
Packaging materials should be harmless and non-toxic to humans and organisms. Packaging materials should not be rich in toxic elements, heavy metals, or the rich content should be controlled below the relevant specifications.
The whole process of packaging products from the collection of raw materials, processing, production of goods, product utilization, waste recovery, and final disposal should not pose a public hazard to the human body and the environment.