Green packaging materials are the packaging materials that are harmless to human health, good protection to the ecological environment and recycled in the packaging materials we produce, manufacture, use and recycle. To widely adopt green packaging and develop green packaging, people need to correctly choose packaging materials. Therefore, green packaging is essentially the greening of packaging materials. The so-called green packaging material refers to the materials or material products that can save resources and energy in the process of production, use, scrapping, recycling, treatment and reuse, can be quickly and naturally degraded or reused after being discarded, will not damage the ecological balance, and have a wide range of sources, low energy consumption, easy recycling and high recycling rate. The common green packaging materials include degradable plastics and natural biomolecular materials.
The new green packaging materials (degradable materials) vigorously researched and developed in the world are all proposed for the "white pollution" that is difficult to deal with. Therefore, green packaging materials can be roughly divided into three categories according to environmental protection requirements and the attribution of materials after use:
One is recyclable materials. Including paper, cardboard materials, molded pulp materials, metal materials, glass materials, common linear polymer materials (plastics, fibers), and degradable polymer materials.
Second, materials that can be naturally weathered back to nature.