Siemens is searching for a new IIR material that does not contain any carbon black as a filler.
The material will be used in O-rings. An O-ring is a mechanical gasket in the shape of a torus. It is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.
Elastomer compounds often contain carbon black as a spherical filler, e.g. to adjust hardness or compression set. With these rubber compounds (e.g. NBR, EPDM or IIR) external suppliers produce O-rings by injection molding in different geometries.
We are looking for an IIR that does not contain any carbon black. This is necessary to prevent contact corrosion between IIR and various metals.
Key success Criteria
Following key success criteria have to be fulfilled:
Type of elastomer: IIR or CIIR
Working temperature: -40°C - +80°C
Hardness: Shore A 50 – 80
Lifetime: about 40 years
Lowest possible permeation coefficient for O2, N2 and CO2
No usage of carbon black
General suitability of the compound for production of O-rings
General suitability of the compound for application as O-rings
Siemens is open to all compounds of the basis of IIR that meet the success criteria.
Approaches not of Interest
Carbon black as a filler is not allowed in the compound.
We are looking for concise, non-confidential proposals. The proposal should:
Describe the technical approach
Provide information on the performance of the technology (if available)
Include a description of the responding organisation or team and their experience.
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