Since more than a decade, many corrugating machines have adopted for the bottom belt a high grip belt, to avoid board slippage between top belt and board when producing heavy products or using difficult and slippery papers.
These belts have been manufactured by using a slightly different version of the standard base for the corrugating belt and applying on the paper side a special silicone coating that confers to the belt a very high coefficient of friction.
All this has been well accepted by the industry but still this belt has to rely on a seam made of steel hooks, something that can cause board marking, uneven belt thickness and sometime even abrasion of the steel plate supports and even pressure shoes.
But until now nothing different was available and so the industry had to deal with these products only.
The technology of Spirabelt has introduced a completely new vision on how a corrugating machine can operate and nearly twenty years of experience have demonstrated the need for open belts to achieve better board quality and reduction of operating costs.
Now this technology has been adapted also for the bottom belts and Feltri Marone has pioneered this research for quite a few years with the result of being able to launch today the new