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The Development and Processing of a Thermoset Rubber Fascia Substrate
Sheller-Globe has developed a paintable thermoset elastomeric substrate material designed for use in automotive fascia, sight shields, etc.
Based on an SBR/EPDM blend the material has a flexural modulus of 138 MPa (20,000). Incorporation of fiberglass and filler modifications readily permit adjustment of the flexural modulus.
A processing study of M-1078 containing 4% fiberglass established that the material is readily moldable by either compression or injection methods.
Optimum mold temperature ranges are 177° to 199°C (350-390°F) with stock injection temperatures running from 138° to as high as 150°C without scorch problems.
Correlation between Mooney viscosity and scorch data and ease of injection molding was noted.
Chen, M., Rees, J., Powell, R., and Reilly, A., "The Development and Processing of a Thermoset Rubber Fascia Substrate," SAE Technical Paper 770842, 1977,
M. C. Chen, J. L. Rees, R. E. Powell, A. F. Reilly
Passenger Car Meeting & Exposition
Bumpers, fasciae and grilles
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