environment, for example in offices or production halls. Depth filters are based on synthetic materials such as fiberglass fleece. They may also be laminated [...] 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
https://www.jowat.com/zh-CN/newsroom-detail/adapting-adhesives-for-the-pleating-process/