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dispersion adhesives based on polyvinyl acetate (PVAc), different hot melt adhesives (PUR and EVA), and glues based on emulsion polymer isocyanate (EPI) are also [...] frame wrapping with MICROLAN, since adhesives based on ethylene-vinyl acetate (EVA) and polyolefin (PO) were not suitable for this material,” explains Dr. Zdzisław [...] requirements for the bonding and coating of the material. PORTA had never used a PUR hot melt adhesive before, however, and did not yet have a suitable melting system

filter media and stabilize it using a hot melt adhesive.” Adhesives like Jowatherm 262.25 based on ethylene-vinyl acetate (EVA) are optimally adapted for the pleating [...] process, with the appropriate open time and high green strength. In addition, hot melt adhesives are solid when cold but remain flexible enough to facilitate