"Most deodorant tubes are made from high-density polyethylene (HDPE or #2 plastic), low-density polyethylene (LDPE or #4 plastic), or polypropylene (PP or plastic #5), but materials may vary by brand. To make things even more complicated, many brands have a dial on the bottom of the tube that is made from a different plastic polymer than the rest of the container. The cap and protective insert may also be made of different polymers."
"Why does it matter if tube components are made from different plastics? Tossing items that aren't accepted by your local recycling program into the curbside bin creates recycling contamination, which costs cities big bucks and can ruin an entire load of recycling. To avoid contaminating your local recycling stream, remove parts of the tube that aren't identified by a recycling code, unless your local recycler tells you otherwise."
Deodorant tubes are predominantly made of plastic polymers such as HDPE (#2), LDPE (#4), or polypropylene (PP, #5). Brands often combine different polymers within one package: the main tube, the dial, the cap, and the internal insert can each be different. Mixed-material components complicate consumer identification and curbside acceptance, increasing the risk of recycling contamination that can spoil entire loads. Many parts can be recycled if they carry a recycling code and if local programs accept that resin. Consumers should remove unlabeled or different-polymer pieces—dials, inserts, caps, and protective inserts—unless local recyclers advise otherwise.
Read at Earth911
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