What plastics are legal

My team is looking into plastic sheets we could use as a scoop. What types of plastics are ok? I have only heard that Polycarbonates are legal are there any others ?

Here’s what the game manual says (pretty much everything you would need to know is in the game manual):

Non shattering plastic from the following list; polycarbonate, acetel monopolymer (Delrin), acetal copolymer (Acetron GP), POM (acetal), ABS, PEEK, PET, HDPE, LDPE, Nylon (all
grades), Polypropylene, FEP; as cut from a single 12" x 24" sheet up to 0.070" thick.

robosource.net is a convenient place to get sheets of these various plastics.