2024-05-28 22:00:00
Traditionally, the regeneration of rubbers (or gums) by chemical means has been crucial. Thus, on the finish of the Second World Warfare, 40% of regenerated rubber “ reclaim rubber » served as a uncooked materials for the rubber business, alone or combined with man-made or natural rubber.
Three causes have led to the discount, and even disappearance, of “reclaim rubber” a minimum of in European international locations and North America:
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the introduction of the radial tire (changing the traditional diagonal tire), which is way more demanding when it comes to the properties of the totally different constituents;
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the very low worth of uncooked supplies;
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the use for the manufacture of regenerated rubber of chemical compounds which are a minimum of of concern inside the that means of the REACH laws.
Finish-of-life rubbers (particularly tires) have lengthy been landfilled. Since 1990, numerous actions in a number of international locations have been carried out to keep away from this landfill and to make use of rubber on the finish of its life both in power restoration or in materials restoration. The present method consists, with out ignoring the curiosity of power restoration, of shifting to materials restoration in each tires and industrial rubber.
On this article, following describing the rubber deposits to be recycled, the totally different materials recycling methods are mentioned:
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incorporation as aggregates in tire and industrial rubber functions and to arrange thermoplastic rubbers;
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regeneration by chemical, mechanochemical, thermomechanical strategies;
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pyrolysis (reinforcing fillers from pyrolysis are utilized in formulations). The oil ensuing from pyrolysis may also be recovered.
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