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Recycling problem after consumption of plastic packaging
In the 1980s, with the continuous introduction of advanced solid plastic bottle production lines from abroad, the prelude to "plastic" and "glass" was opened. Since then, health food bottles have been widely used in the packaging field. The biggest feature of solid plastic bottles is light weight, non-fragile, clean and beautiful. Some of its technical indicators and a large amount of data indicate that its chemical resistance, water vapor permeability and sealing performance are excellent. It can completely guarantee the life of the installed products. The product acts as a security shield and protection.
In the past 20 years, plastic packaging recycling has achieved leapfrog development. Thousands of consumers have taken the initiative to join the recycling of plastic packaging, while the establishment of recycling packaging and reprocessing plants has created a new concept - "post-consumer recycling packaging" (PCR). The most interesting thing in this regard is the post-consumer recycled PET. RPC has applied it to juice bottles and cans. These recycled packaging uses only 25% to 40% of fresh polyester material, and the rest of the material is recycled PET resin, which consumes 70% less energy.
Since PET is not suitable for injection molding, if you want to use this method to produce any package containing recycled PET material, you have to find a solution to many problems: the packaging design needs to be more concise; the thickness of the bottle wall may need to reach the original two Double, but this will increase the overall weight of the bottle by 260%; a new mold is needed. In addition, other properties of injection molded PET containers are also affected, such as not being suitable for easy opening and heating in a microwave oven.
The performance of recycled polypropylene (PP) materials is not sufficient for packaging applications. This is mainly due to the fact that the polypropylene packaging materials currently in use are too high in level, and consumers cannot identify various grades of packaging at the time of recycling, so that the quality of the recycled polypropylene material is not very satisfactory. However, industrially recycled PP materials are used to produce contact lens cases, and the quality of this packaging material has reached food contact levels. This example also shows that the plastics industry has been continually striving to develop environmentally friendly packaging with good performance. The best proof is lightweight packaging. As a result of reduced energy consumption during production and transportation, the overall carbon footprint of the package is also reduced.