I made diaper covers several years ago from PUL (polyurethene laminate). Some people have trouble with the shiny side sticking to the presser foot or the bed of the machine. I don't remember if this was mostly on modern machines or vintage. I do remember that some used a teflon foot and others used tissue paper on both sides of the PUL so it won't grab or slide. I didn't have a problem with PUL on my vintage Bernina 830 using Metrosene poly thread and the smallest needle I could get away with. The PUL needs to be heated in a hot dryer after sewing to seal the needle holes.