The direction of plastic development can be summarized in two aspects. The first is to improve the performance, that is, to modify the existing varieties in various ways to improve their comprehensive performance; the second is to develop the function, that is, to develop polymer materials with physical functions such as light, electricity and magnetism, so that the plastics can have Photoelectric effect, thermoelectric effect, piezoelectric effect, etc.
From the current development speed of the world plastics industry, Germany and Sweden rank first, followed by some countries in Japan and Europe, and the United States is slower. At present, foreign plastic packaging presents the following development trends:
Copolymer composite packaging film
At present, some countries in Europe and America invest heavily in the development of non-polar, polar ethylene copolymers, which will greatly improve the stretching and co-extrusion properties of plastic film, and improve transparency, sealing strength, stress resistance, crack resistance, and stability. Improve molecular weight and extrusion rheological properties.
Foreign experts believe that the current development of the world's plastics industry focuses on plastic modification, coating technology for plastic products, rapid biodegradation of waste plastics, and comprehensive recycling technology for plastics. For example, some manufacturers in Europe and America adopt a linear ethylene-α-olefin copolymer and an ethylene-vinyl acetate copolymer/PA bag, which is suitable for packaging ice cream, milk fat and the like.
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