product design paper 1

What is an Elastomer?

Materials which at room temperature can be deformed under pressure, and upon release of the pressure will return to their original shape.

What are the properties/characteristics of Natural rubber (polyisoprene)?

high tensile strength, low elongation, good hardness compared to other elastomers, tough, electrical inculator, good cold resistance.

What are the uses of Natural rubber (polyisoprene)?

Tyres, hoses, ballon’s, tubes and belts

What are the properties/characteristics of Butadiene Rubber (BR)?

Tough, excellent wear resistance against friction, good thermal resistance against friction, electrical insulator.

What are the uses of Butadiene rubber (BR)?

Vehicle tyres, shoe soles, conveyor belts

What are the properties/characteristics of neoprene (polychlroprene rubber)?

Good thermal resistance, toughness, good oil and chemical resistance, excellent weather resistance, good abrasion resistance and electrical insulator.

What are the properties/characteristics of silicone?

Good flexibility at low temperatures, poor abrasion resistance, good thermal resistance and resistance to temperature extremes, good weather resistance, good lubricating qualities, electrical insulator.

What is Vacuum forming?

A shaping process where a heated, pliable thermoplastic sheet is clamped over a mould and pulled tightly into shape using suction to produce hollow 3D items such as trays, box liners, and yoghurt pots.

What is Thermoforming?

An industrial polymer shaping process where a heated plastic sheet is pressed between a positive mould and a negative mould while vacuum suction is applied. It allows for moulding thick polymer sheets (such as $6\,mm$ acrylic) or achieving fine surface details like embossed logos and pattern’s for items such as baths and food packaging.