The new elastomeric alloys such as Monsanto's Santoprene thermoplastic rubber (A class of TPE) can be formed during extrusion by the use of a chemical blowing agent or by the use of a fluorocarbon blowing agent to provide products with characteristics superior to foamed vulcanised rubber. These materials offer more precise dimensional design tolerances, better process control and reprocessing of scrap. Other advantages are in heat weldabiliry, better compression set and compressive load.
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References
1.
BlowC.M., Rubber Technology and Manufacture, Butterworth & Co. (Publishers) Ltd., London, England
2.
Monsanto Technical Correspondence, ‘Extrusion Foaming Technology for SANTOPRENE®, Thermoplastic Rubber’
3.
Allied Chemical, Technical Service Report, ‘Extruded Thermoplastic Foam Technology’
