New CV inner liner cuts air leakage by 30%, says Yokohama
As of this month, Yokohama rubber’s tyre factories in Japan will begin using a newly developed inner liner technology that is said to “substantially” improve the retention of air pressure in truck and bus tyres. The tyre maker says it can reduce natural air leakage by approximately 30 per cent compared with conventional liners. Not only does this help maintain air pressure, Yokohama says it also permits the design and manufacture of lighter tyres. Following the technology’s adoption in Japan, Yokohama Rubber will gradually introduce it at truck tyre factories in other parts of the world.
The new inner liner uses “flat talc” – particulate talc in planar shapes, a key characteristic of the mineral talc – imbedded in the rubber in multiple layers. According to the tyre maker, the flat talc blocks the permeation of air through the rubber, substantially cutting the volume of air naturally escaping from the tyre. Yokohama already utilises air leakage reduction technology for passenger car tyres; its “Airtex Advanced Liner” was released in 2009.