Liquid silicone rubber (LSR)

Liquid silicone rubbers are addition cured, in contrary to the peroxide cured all solid silicones. Applying the injection moulding process there are 2 ready mixed single components A + B blended in a 1 : 1 ratio and injected into a heated-up vulcanisation mould. Liquid silicones are distinguished for very short curing times. The LSR process can be carried out at a low injection pressure.This is why an almost flashless production of the moulded parts is possible.

The characteristics of liquid silicone rubber is very similar to those of solid silicone rubber. They show a high temperature resistance, very good flexibility at deep temperatures, an excellent ageing behaviour and superior electrical insulation features. Furthermore, they possess a good tear strength and a high elongation at break (link).

LSR is available in a range of 30 to 80 Shore A.

Areas of application: Moulded parts out of liquid silicone are used in the same way as solid silicone moulded parts. Many moulded parts out of LSR are used in the medical technology due to the high physiological compatibility. Special high transparent types are suitable for optical application (i.e. contact lenses).

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