Plastics are essentially joined chains of similar chemicals. Polymers are the name given to these chains. This is why many polymers, such as polyethylene, polystyrene, and polypropylene, begin with "poly." Polymers are frequently composed of carbon and hydrogen, but may also contain oxygen, nitrogen, sulfur, chlorine, fluorine, phosphorus, or silicon. All of these polymers are referred to as "plastics." Despite the fact that there are several polymers, plastics, in general, are lightweight and strong. Plastics may be molded, extruded, cast, and blown into virtually infinite shapes to create plastic packaging Penang such as plastic containers, plastic pallets, and many more.