Magnetostriction-based ultrasound in rubber devulcanization and related processes
First Claim
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1. A continuous process for the devulcanization of vulcanized elastomeric material, said process comprising:
- pressurizing said material and treating said material by cylindrical convergent waves while so devulcanizing with alternating ultrasonic pressure waves produced by a magnetostriction transducer at a power level and for a period of time sufficient to dissociate carbon and sulfur crosslinking bonds and devulcanizing said material at power levels scaled from about 15 KW to about 180 KW.
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Abstract
The breakdown of crosslinked elastomers, including the devulcanization of crumb rubber, is achieved by exposing the elastomers to ultrasonic vibrations induced by magnetostriction transducers. The transducers are capable of a higher power output than ultrasound produced by piezoelectric transducers, and are able to withstand high temperatures and high-frequency vibrations to a significantly better degree.
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11 Claims
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1. A continuous process for the devulcanization of vulcanized elastomeric material, said process comprising:
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pressurizing said material and treating said material by cylindrical convergent waves while so devulcanizing with alternating ultrasonic pressure waves produced by a magnetostriction transducer at a power level and for a period of time sufficient to dissociate carbon and sulfur crosslinking bonds and devulcanizing said material at power levels scaled from about 15 KW to about 180 KW. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification