LLDPE resin, the full name is Linear low-density polyethylene, is non-toxic, tasteless, and odorless milky white particles.

HDPE resin, with the full names of high density polyethylene, is a high-density thermoplastic polyolefin produced by copolymerization of ethylene.

PET resin is a crystalline saturated polyester with a smooth and shiny surface. Its appearance is a milky white or pale yellow, highly crystalline polymer.