Industry challenges These materials can be found in different colours and with different additives and different fibres to change their properties such as Flame retardant, Anti-static additive, UV- stabilised. Homopolymer polypropylene has a better tensile strength and a higher temperature resistance than the HDPE but lower impact strength. Copolymer has a higher impact strength than the homopolymer but it has a small reduction in other properties. It is used generally for applications, which have colder conditions. Applications Industrial fabrication for large scale components. Specifications Specific Gravity - 0.91 Water Absorption - 0.01 Max Service Temp - 100 Low Temp limit - 5 Tensile strength at yield - 57 Elongation at yield %14 Elastic modulus - 1450 Linear coefficient of thermal expansion DIN53752 - 10-4 x K - 1.5 Heat deflection temperature - 95