Retreading Technologies

Retreading designates the technical process allowing the life extension of a used tyre

It basically consists in the replacement of the worn-out tread. The retreaded tyre is brought back into the same service conditions without sacrificing tyre road performances. This process may be repeated as long as the casing integrity is guaranteed. The production of retreaded tyres is mainly concentrated on truck, passenger car, off the road and aircraft tyres.

To produce, retreaded tyres, two technologies are available:

  • "Pre-moulded" or "cold cure" retreading
    This process applies to truck and passenger car tyres. The new tread that will be applied is prevulcanized to its final shape. Casing and procured tread are crosslinked in an autoclave through a special cushion compound. The advantage of this process is its flexibility to produce small series of various sizes and designs.

    This technology is used to produce 49% of all retreaded tyres in Europe.

  • "Mould-cure" or "hot cure" retreading
    In this process, uncured tread cap compound is applied to the buffed casing. The vulcanization takes place in a proper tyre mould. This method applies to large volume production due to the high investment and maintenance costs.

    This technology is used to produce 51% of all retreaded tyres in Europe

    This retreading process involves six steps:
    1)  Initial inspection
    2)  Buffing
    3)  Tread preparation and building
    4)  Enveloping
    5)  Vulcanising
    6)  Final inspection