fleece. The filter manufacturing process is delicate and, in addition to bonding, the adhesive used has to fulfill a wide range of functions. Building filters for [...] manufacturers pleat the filter media and stabilize it using a hot melt adhesive.” Adhesives like Jowatherm 262.25 based on ethylene-vinyl acetate (EVA) are optimally [...] filters is due to the adhesive used in the manufacturing process of HEPA filters. “Big filter elements contain up to six kilograms of adhesive,” says Dressler. It
https://www.jowat.com/pt-BR/detalhe-da-redacao/adapting-adhesives-for-the-pleating-process/