Adhesives for filters with enhanced thermal stability

High-performance adhesives are indispensable for the production of industrial filters. They fulfill important design functions such as the stabilization and end bonding of folded filter media or the joining of filter media to frame parts. The adhesives used must meet high quality standards, since they will be exposed in use to many different kinds of stresses, resulting from heat, pressure and chemicals. Add to that the demands on manufacturing efficiency: Filters are normally manufactured in large quantities, which requires fast cycling during adhesive dispensing as well as highly economical product usage.

The new polyurethane adhesive Macroplast UK 1352 developed by Henkel offers multiple advantages here. A filter bonded with this adhesive can withstand continuous operating temperatures of up to 120 °C, double the temperature resistance of the predecessor product. In addition, the innovative adhesive reaches handling strength at room temperature after only 15 minutes.

For filter manufacturers, Macroplast represents a viable alternative to traditional epoxy adhesives. The latter have to be processed hot, are therefore energy-intensive, and take about one hour to cure. Moreover, they also cost more to buy.

Further innovations for the filter sector are the two new Henkel developments Macroplast CR 3529 and Macroplast CR 8605, both of which have been approved for use in potable water filters. These adhesives also have double the temperature resistance of their predecessors – up to 80 °C in continuous operation.