After rapid development, China"s plastic flexible packaging has entered a period of stable development, with profit margins gradually decreasing and competition becoming increasingly fierce. The 21st century is a century of environmental protection. In order to meet the requirements of the new era, plastic packaging materials must be developed with the starting point of saving resources, being easy to recycle, dispose of, or be easily absorbed or degraded by the environment after use.

1. * * * High barrier packaging materials with protective properties and extended shelf life. Such as the development and application of high barrier co extruded composite films; High resistance plastic packaging materials have been rapidly developed and applied due to their ability to provide quality, freshness, flavor, and shelf life extension functions. In addition to the current applications of polyvinylidene chloride (PVDC), ethylene, and vinyl alcohol copolymers (EVOH), in recent years, the development of environmentally friendly materials has led to the promotion of polyvinyl alcohol (PVA), polyethylene terephthalate (PEN), copolyamide (MXD6) The development of silicon or aluminum oxide vapor films (soft glass), nano inorganic materials, etc. will be more eye-catching.

2. The development and application of sterile packaging materials, * * * * * packaging films, and radiation resistant packaging films; The major advantages of sterile packaging materials and technology are that under sterile conditions, they do not add preservatives, do not require refrigeration, and can retain the original nutritional components and flavors of food to a large extent. They can greatly extend shelf life, facilitate storage and transportation, and have a rapid market development. Their applications are constantly expanding. In addition to their large proportion in dairy products and fruit sweat beverages, they will further expand to the fields of pharmaceuticals, cosmetics, and condiments.

3. Nanocomposite packaging materials will rapidly industrialize with the rapid development of nanotechnology. Due to their significantly enhanced wear resistance, hardness, strength, permeability, and plasticity, they can not only be used for food packaging, but also for special packaging such as * *, anti electromagnetic, invisible, and dangerous goods packaging. They are heat-resistant packaging materials suitable for electromagnetic stoves and microwave heating, which will promote a huge transformation of traditional plastic packaging materials.

4. Environmentally friendly (environmentally friendly) plastic packaging materials (or green plastic packaging materials), with the implementation of the IS series of environmental management standards, have become the focus of global attention. Among them, plastic packaging materials that are easy to be recycled, such as PET, PEN, biodegradable plastics in environmentally degradable plastics (EDP), have become the focus of hot spots. Others, such as zero pollution foam plastics, thin-walled bottles and bag shaped packaging containers, have also received much attention. Controllable atmosphere controlled packaging materials suitable for the storage of agricultural products such as grains.