Identifying different types of plastics and polymers

摘要

Different plastics are made from different types of polymers.The different types of polymer give the plastics different characteristics and make them good for different applications,for example fizzy pop bottles are made from PET (Polyethylene Terephthalate);milk,juice and detergent bottles are made from HDPE (High Density Polyethylene);a few bottles are still made from PVC (Polyvinyl Chloride).