nes (e.g. polyethylene or polypropylene) or vinyl or vinylidene resins, such as polyvinyl chloride, polystyrene, vinyl chloride-vinyl acetate copolymers, styrene-butadiene copolymers, polyvinylidene chloride; polyamides such as nylon (e.g. nylon 6); cellulosics such as cellulose acetate, etc.