It is a formaldehyde based engineering
plastic also known with trademarks Delrin®,
Hostaform®, Celcon® and Ultraform®.
In technical
jargon, its name is polyoksymetylene (POM) or polyasetal.
Polital® is completely resistant to solvents, petroleum
products, oil and grease. It is not resistant to strong acids,
bases and oxidants. As it is affected by UV rays, its use in open
air is not recommended.