It is cheap and easy to mould, and is made into refrigerator and washing machine components. It can be foamed to make single use packaging, such as cups, meat and produce trays. Polyurethane is made during the reaction of an isocyanate and one or more polyols. It can be made into flexible or rigid foam and solid forms. The foams are good insulators, and used for products such as building insulation, car seats and furniture.
Propane gas is a gas derived from oil.
Propylene is derived from oil, and is one of the main raw materials for polypropylene. It can be clear, flexible or rigid, and is made into produts including fruit juice bottles, credit cards, pipes and hoses. R Glossary Index Reaction is the interaction of chemical substances to create a different material. Resin is the polymer raw material which is processed into plastic products. Rotational moulding occurs when powdered plastic is poured into a mould that is then rotated and heated.