DOW Hyperlast is a plastics manufacture company based in Birch Vale, Derbyshire. They develop polyurethanes for a wide range of applications, although their manufacturing department is closing down at the beginning of next year, leaving just their research and development department.
Hyperlast is a type of material used in the production of balloons that is known for its high elasticity and tear resistance. It is often coated with a thin layer of impermeable material to prevent the escape of gas.