Recycling symbols for

The recycling symbol for polyvinyl chloride is the number 3 inside a triangle made of three arrows. 

Thermoplastic polymers can be melted down and reformed. But in order to do this, the plastics must be separated into their various components. Most plastic containers contain a symbol on the bottom that indicates what type of plastic the containers are made of. Recyclers can use these symbols to separate the plastics into various categories to make recycling easier. Figure 16-10 shows the recycling symbols for plastics and indicates what type of plastic each symbol represents. 

FIGURE 185 Plastic recycling symbols for (1) poly(ethylene terephthalate), (2) high density polyethylene, (3) vinyl polymers, (4) low density polyethylene, (5) polypropylene, (6) polystyrene, and (7) aU other polymers. 

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