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Uretech offers flat liners in the form of sheets or cut-to-size liners. Flat liners have patented fiber-reinforced backing plates, providing stiffness to the liners. Liner stiffness will prolong the life expectancy of liners, by preventing material from flowing underneath the liners and thereby creating a bulging effect.
The fibre-reinforced backing plates are easier to cut and drill, compared to traditional steel backings, thus making it more cost effective as the liners can be cut to size ex-factory or on site.
There’s a major reduction in damages when using fibre-reinforced backing plates intead of metallic alternatives. Using non-metallic backing plates substantially reduces the risk of damage to downstream mining equipment, like conveyor belts and slurry pumps.
Uretech manufactures sheets with a standard size of 2400 mm x 1200 mm. These sheets can be cut to customised shapes and sizes to fit any application. Uretech can manufacture liners to any thickness, 12mm – 40 mm being the most popular. Sheet thickness is normally determined by the customer’s maintenance cycle and space allowance.
Uretech’s unique wear indicator layer enables end-users to visualise when liners have been worn out to their minimum thickness so that replacement can be planned. Uretech liners literally changes color when the liners are worn. Uretech liners are typically a red layer that covers a bright yellow layer beneath, for easy observation. Wear indicators make it easier for plant operators to plan their maintenance cycles better and prevent damage to equipment. Wear indicators also highlight high wear areas within applications, enabling operators to consider chute, material flow or liner design changes. Wear indicators are normally 30% of the overall thickness of the liners, thereby indicating to the operators the remaining life expectancy.
Uretech liners can be attached by a range of off-the-shelf fastening systems. Countersunk bolt heads are the recommended fasteners. This method does not require a countersunk hole to be drilled, only a straight-drilled hole. The bolt head will effortlessly be pulled into the elastic polyurethane. The bolt head ultimately seats against the composite backing plate. Once installed, the polyurethane will act as ‘n mechanical lock, preventing bolts from dislodging from the liners. An additional benefit of using this installation method is that the drill-hole is much smaller, preventing excessive wear around the hole.
