EFG America

Rubber Masterbatch Production 

Rubber Vulcanization:

The technology that allowed simple Hevia tree sap to become this valuable material was the "Vulcanization" process discovered by Charles Goodyear in 1839. He discovered that if he took raw rubber, added sulfur to it and "cooked" it under pressure, that the previously gummy material was now a stable, smooth non-sticky product what would return to its original form after being stretched. The previous gummy material that would get sticky on a hot day now had "locked" in the wonderful properties of elasticity, tensile strength, abrasion resistance and its unerring ability to return to its original shape after being stretched or compressed. This wonderful development had a big downside, this indestructible material was "indestructible" once vulcanized and would retain its properties long after the useful life of the product made with the vulcanized material. The biggest evidence of this has been the waste tire challenge but large amounts of other rubber is discarded or burned each year.

Rubber Devulcanization: Reclaimed Rubber

A technology developed in the 1880's called the reclaiming process would devulcanize the rubber, severing the bonds to the sulfur; but also destroyed most of the beneficial properties of the rubber. Large amounts of Reclaimed Rubber were produced in the USA until the clean air and clean water acts were passed. Now, the majority of North American waste tires are burned as industrial fuel in cement kilns; a tragic waste of a valuable material. Currently rubber reclaiming continues in China and India and produces about six million metric tonne a year of low quality, low value "reclaimed" rubber. This is about a 5 billion dollar industry.

Rubber Devulcanization: EFG America

EFG America has exclusive rights to a chemical devulcanization technology that can devulcanize any sulfur cure rubber compound, and can be produced in large volumes; each mixer can produce 800 pounds of devulcanized rubber every fifteen minutes. The process is environmentally benign, there is no waste generated by the process; nothing into the air, water or landfill. The properties of the technology depend on the properties of the waste rubber used; but generally we can achieve over 80% of the properties of the feedstock. The EFG devulcanized product can be used back into the manufacture of new rubber products including tires.

We can make the "Rubber Meet the Road' again and again: The "EFG Rubber Revolution".