The development of composite packaging materials.
The development of composite packaging materials. The advent of multi-layer composite flexible packaging materials represents a significant advancement in the history packaging development. It has not only transformed many old packaging concepts but has also driven substantial developments in packaging machinery, packaging materials, packaging technology, and even the entire field packaging science. The development of composite packaging materials with perfect functionality, diverse varieties, low cost, and adaptability to different product needs has brought tremendous economic benefits to today packaging industry. It is expected that the development of composite packaging materials will continue to hold a significant position in the entire packaging industry in the future. Many new technologies processes will be applied in composite packaging materials, further driving the progress of packaging science. However, the emergence of multi-layer composite materials has also brought new problems in the of packaging waste. It has been recognized that the development of packaging must be coordinated with the environment. When pursuing the perfect packaging function of multi-layer composite structures, the of energy and materials and the recycling of packaging waste should be considered. This is clearly a contradiction between two factors. To facilitate recycling, packaging should be made of a material as much as possible; while to meet the needs of multi-functional packaging, a combination of various materials should be used. Packaging workers have done a lot of work coordinate the two, developing better performing multi-functional single-layer materials and composite materials that are easy to recycle. For example, the recently developed PET/SiOx coated/CPP and OPP/SiOx coated film/CPP multi-functional new composite flexible packaging materials are a type of green packaging material that is easy to recycle. This material, coated with inorganic oxides, has the same barrier properties as aluminum vapor-deposited film and is transparent. It has excellent resistance to rupture, folding chemical agents, and heat, and is convenient for heating food in microwave ovens. It will become an alternative product to aluminum-plastic composite materials. With the continuous of new packaging materials, composite materials will also continue to develop and play a special role in packaging materials that other materials cannot replace。
