PUL (polyurethan laminate) is an polyether woven fabric, with a film/sheet waterproof layer, which exhibits excellent hydrolysis and fungus resistance. This combination of properties makes it an excellent choice for applications where high humidity and water exposure are likely along with low air permeability (inflatables). Resistance to acid and base solutions is also very good. Its melt processing is characterized by a low Melt Flow Rate. It is also formulated with an anti-block additive to allow the film to have good surface slip properties.
The medical industry uses PUL fabric for their surgical gowns and drapes because they are fluid proof and can be autoclaved at high temperatures to sanitize. Because this fabric is built to withstand high temperatures, it can be washed on hot and dried on hot (coated PUL only). Covers and All in One diapers sewn with PUL will last through a child's entire diapering period and often will still be in good enough condition to use on a second or third child.