Elastomers / Silicones

Elastomers / Silicones (rubber) consist of (ir-)reversibly cross-linked macromolecules, which boasts a high elasticity in the operating temperature range.

The elasticity of most rubbers (e.g. Silicone) can be specifically adjusted by vulcanisation, i.e. the chemical or physical variation of the molecular cross-linking.  The Shore hardness is a significant  differentiatior as an index for the hardness of an elastomer (according to Albert Ferdinand Shore).

So-called blends (mixtures) of elastomers and thermoplasts are also used as elastic plastics. They are less resistant, but can be thermally processed.

Characteristics

• permanently elastic
• temperature resistant
• oil resistant

Typical applications

• seals (e.g. the seamless liquid silicone seal injected in one piece)
• handles
• medical articles
• car tires

Technical options

• injection moulding and various special processes (esp. foam injection moulding)
• extrusion and various special processes
• vulcanization

Closing forces on Liquid Silicone 

The Liquid Silicone machine can be used up to a clamping force of 30 tons.