YKK launches new water-repellant zipper designed to work in circular systemsYKK announces the release of its new DynaPel™ water-repellant zipper featuring GTT EMPEL® technology. Designed to be compatible with garment recycling systems, DynaPel™ uses EMPEL® technology instead of the standard PU film to achieve its water repellency. The lack of a PU film helps remove one of the barriers of textile-to-textile recycling of performance apparel by eliminating the urethane material, which presents challenges to garment recycling processes.