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Processing > Identifying Plastic Waste


 

Plastic identification 

In 1988, to assist recycling of disposable items, the Plastic Bottle Institute of the U.S. Society of the Plastics Industry devised a scheme to mark plastic bottles by plastic type.

Under this scheme, a plastic container is marked with a triangle of three "chasing arrows", which encloses a number denoting the plastic type:

1-PETE 2–HDPE 3-PVC 4-LDPE 5-PP 6-PS 7-Other

Plastics type marks: the resin identification code
  1. Polyethylene terephthalate (PET or PETE)
  2. High-density polyethylene (HDPE)
  3. Polyvinyl chloride (PVC)
  4. Low-density polyethylene (LDPE)
  5. Polypropylene (PP)
  6. Polystyrene (PS)

Identification of plastic items that bear this mark is fairly trivial, however not all items will cary this mark.