Polyurethane is a polymer composed of organic units joined by carbamate links. To put it in plain terms, polyurethane is a type of plastic.
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Polyurethane is used in many different types of applications and comes in all different forms. For example, polyurethane is used to create the foam in foam sponges. It is also used to manufacture high resistance tyres. The applications for polyurethane are countless.
As a material, polyurethane can be customised depending on the chosen application. The chosen formula can be altered to suit many purposes.
Polyurethane is a softer material when compared to carbide and can be used on new, older or worn belts. It is particularly effective when the surface has become worn or uneven.
On a belt scraper, polyurethane blades are generally not tough enough to damage the conveyor belt itself and thus are more forgiving when something goes wrong.
As conveyor belts wear, deformities, cracks and dents are common occurrences. The polyurethane blades are able to wear into the shape of the belt in a reasonable time frame, thus maintaining effective cleaning through varying conditions.
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Carbide refers to any class of chemical compound in which carbon is combined with a metallic or semi-metallic element. For our purposes, carbide refers to tungsten carbide which is valued for its physical hardness, strength and resistance to chemical attack even at high temperatures.
Due to its high-resistance properties, carbide blades are chosen for heavy duty applications as the wear rate of the blades are low. However, the same properties can cause issues with worn or damaged belts.
The carbide blades do not wear into the shape as rapidly as polyurethane blades or give way to cracks and dents. This can cause the carbide blades to catch on any abnormality of the conveyor belt and cause damage to the blade mechanisms and the conveyor belt itself.
Carbide blades are generally the best for new conveyor systems when the belt is undamaged or unworn. As the belt becomes worn, carbide blades can be switched over to polyurethane when required.
Pleiger&#;s polyurethane scraper blades and belt cleaners are used in a variety of applications. Mining, construction, material handling, and food processing are a few industries in which they are used. There are multiple urethane compounds available to tailor the scrapers' specific performance, whether it is high temperature, abrasion resistance, chemical resistance, or FDA approval, Pleiger has a polyurethane compound to fit any need.
Our polyurethane scraper blades and belt cleaners offer the durability needed on automated conveyors and belts to clean and scrape material off the surface. Polyurethane scrapers offer a longer life and better performance than rubber or other materials. Polyurethane is also resilient, and therefore absorbs impacts and conforms to the surface without causing damage to the belt or clipper splices. A wide range of durometers are available whether you are removing large aggregate or water from your surface.
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