Acetal, has dimensional stability,
lower moisture acetalorption, and easier machinability than nylon, but is not as
good in slide wear. It is FDA/USDA/NSF/3A Dairy Approved, has continuous-use
temperature of 180° F, and is available in two types of Acetal sheet (Homopolymers-Delrin
150SA, 550SA; Copolymers-Acetron GP, Celcon.