Suitable macromolecular compounds include such homopolymers as polyethylene, polystyrene, polyvinyl, polyacryl and polyurethane type polymers; fluorinated resins; silicone resins; epoxy resins and natural resins; copolymers such as vinylidene chloride/vinyl chloride copolymers, vinylidene chloride/acryl copolymers, vinyl acetate/acryl copolymers, styrene/acryl copolymers, and ethylene/vinyl acetat