The ultimate solution
HIGH IMPACT, TEAR AND RIP RESISTANT BELTING
In some applications, especially primary and secondary crushers, even the strongest and heaviest conventional belts can be ripped or torn by large lumps of heavy, sharp objects, either falling from a height or becoming trapped. Belts can often be destroyed within a matter of weeks or months. The Dunlop solution to this problem is UsFlex, which has longitudinal rip resistance more than five times that of multi-ply belts of equivalent rating because of our unique straight-warp construction. UsFlex provides impact resistance up to three times greater than that of conventional plied belting. This unequaled toughness means the belt will not be easily damaged in the loading and conveying of large, sharp material. As a result, UsFlex will provide the longest belt life in the harshest conditions!
Belt characteristics
UsFlex stands out with its unique straight-warp carcass, exclusive to Fenner Dunlop. Heavy polyester strands run lengthwise, and heavy nylon strands run crosswise, held securely by strong yarn. Unlike conventional carcasses, the strands are completely straight and not interlocked, allowing the weft to float freely. This design spreads impact energy over a larger area, minimizing peak stress points and delivering superior carcass protection.
Availability
Fenner Dunlop UsFlex is available from stock in two tensile strengths; 630/1 6+3 and 1000/2 8+3 in widths up to 2000mm. UsFlex belts are supplied with the abrasion resistant ‘RS’ cover as standard. The Fenner Dunlop RS cover grade exceeds the very highest DIN and ISO grades(DIN W and ISO 14890 ‘D ‘). Other tensile strengths and cover qualities can be made to order. Available in widths from 400mm up to 2200mm.
UsFlex FAQ
The ‘secret’ of UsFlex strength is the totally unique ‘straight warp’ inner fabric, which Fenner Dunlop produce in-house in the USA. It consists of heavy lengthwise strands of polyester and heavy crosswise strands of nylon held in position by a strong yarn. The strands are not interlocked so the weft is allowed to float free from the warp thereby ‘gathering up’ to resist ripping and tearing and also allowing energy to dissipate at the point of impact
The rip resistance of UsFlex is more than five times greater than conventional multi-ply belts of a similar tensile strength. Only the rip resistance of the carcass is measured. The covers are removed so the thickness and quality of the covers does not influence the test comparisons.
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