Surface World Handbook 2017 - Page 193

of material with a specified thickness and finish. They require plant with multiple sets of rollers, normally laid out linearly in high-production lines. The rollers may be heated and are often required to release sticky products, apply another material to the product’s surface, compress the product to increase density and produce the surface finish. To achieve these aims and deliver the right quality, specialist coatings must be applied to the rollers. Coatings may have easy-release, abrasion resistant, aquaphobic or aquaphilic properties. They may also have textured finishes. The cost of the coating obviously increases the capital cost of the installation, and this increase can be substantial on large rolls. However, higher quality and efficiency offset this; without the coating, production costs can increase significantly. For example, frequent line closures may be necessary to clean rollers. Another scenario is material breaking due to adhesion to the roller, and the wrapping effect causing high tension and web failure. In these applications, the cost of downtime, wastage and lower-quality product can dwarf the incremental coating cost. Surface Technology has a long history of developing coatings for materials manufacturing and can handle the very large rollers common in the paper and textile industries. twitter: @surfaceworldmag Food manufacturing Food production has similar challenges relating to quality, consistency, and efficiency for large volumes. Using coatings throughout the production cycle helps overcome these challenges while delivering cost benefits. Easy-release coating on mixing equipment saves money on wastage and cleaning. A similar coating in moulds provides a rapid return on investment by boosting quality, reducing scrap and driving down cleaning costs between cycles. Businesses can achieve additional savings by using low-friction, non-stick coatings on guillotine blades – these coatings help reduce product waste and the downtime needed to change blades. Surface Technology was the first company to develop a tougher, non-stick coating. The original Armourcote ® stainless steel reinforced non-stick coating was first formulated in the 1960s, and the range today uses the same principles to improve equipment lifespan even further. Here is an illustrative example. Multiple caramel-coated biscuit strips needed to be cut into short lengths before the individual biscuits were coated in chocolate. CONTINUED ON PAGE 192 2017 - 2018 191