Ultra-low viscosity ACM adds to seal possibilities

ERJ staff report (DS)

Weinhein, Germany - Freudenberg said it has can now produce complex, filigree seals in acrylic rubber (ACM), using geometries previously possible only with liquid silicone rubber. The development follws a new material innovation, said the company.

Freudenberg noted that ACM materials are much more compatible with engine oils and other automotive fluids than silicone rubber, and said this opens the way to new types of seal in the engine compartment.

Freudenberg said “the new sealing material boasts chemical resistance and swelling behaviour properties that are similar to those of standard ACM. This means that L-ACM offers an outstanding opportunity to create completely new sealing shapes that are characterized above all by their incredibly filigree structures.”

It added, “This new sealing material also makes it possible to exploit to an even greater degree the system- and process-related advantages of elastomer processing in the form of multi-component parts.”

The company said its prototype bonded well to a sheet metal component treated wih zinc phosphate, and could accurately mould features just 150 µm in height.

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Press release from Freudenberg