08/14/2012

www.gupta-verlag.de/polyurethanes

PU sealing system suitable for immediate use

In certain industrial applications that form part of complex production lines, components need to be used straight after sealing without long curing sections. The Raku-PUR 32-3250-36 soft integral foam from Rampf Giessharze ensures eight hours' production without any interruption. The special thing about this material is that curing is no longer necessary. According to the company, a short conveyor distance of two to three meters is sufficient to apply the foam gasket and ensure the component is ready for use. Tack-free components are ready for packaging in less than 150 seconds.[image_0] No additional curing measures such as an oven or inductive/infrared radiation are needed. The ambient temperature is sufficient to cure the sealing material applied "in situ”, making the component ready for further processing. Unlike with conventional systems, users do not need to invest in additional equipment or pay the extra energy costs associated with curing. Thanks to these features, this new foam gasket is ideal for use in all technologies that require short cycle times, says Rampf Giessharze. Other material features include low water absorption and high mechanical strength for adhesion to various materials, from polypropylene to painted steel, in assembly operations. The company says the material offers long-term temperature resistance in a range from -30 °C to +90°C and can be exposed to temperatures ranging from -40 °C to +140°C for short periods. In addition to applying the product directly to the component, application of moulded foam (with the foam produced in moulds as a structural component) and other methods are also supported. Benefits of Raku-PUR 32-3250-36: Minimal curing section and curing at ambient temperature - no additional energy costs for curingImmediate handling of the component (component is at ambient temperature)Material can be used in various technologiesSuitable for IP 66, 67 and 69 (IP following application in conjunction with component)Adhesion to all kinds of materials, from polypropylene to painted steel (following prior plasma treatment)Flexible system adjustment, i. e. a system with different Shore hardnesses is possibleSlow start-up time of 40 - 55 seconds but tack-free, in less than150 seconds

www.gupta-verlag.de/polyurethanes