Plastics are polymeric materials that have the capability of being molded or shaped, usually by the application of heat and pressure.
Figure138.1 Different plastics and their recycling codes.
There are many types of plastics, and they can be sorted by different ways. The following are three common ways.
Figure138.2 Typical applications of plastic materials found in garbage collections.
Based on the resources, plastics are split into natural plastics (easily obtained from plants and animals) and ...
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