Acetal resins, whose chemical name is polyoxymethylene, are formed from the polymerization of formaldehyde. Acetals tend to have a high degree of crystallinity, giving them superior strength and stiffness compared with other thermoplastics, while retaining good toughness at low temperatures. Acetals are known for their high strength, fatigue and corrosion resistance, surface hardness, lubricity, and resilience.