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Acetal (POM)
The acetal resins are among the strongest and stiffest of all thermoplastics, and are characterized by good fatigue life, low moisture sensitivity, high resistance to solvents and chemicals, and good electrical properties. |
Advantages of Acetal
High strength, good lubricity and resistance to hydrocarbons and organic solvents. Acetal machines well.
- Lubricated
- Copolymer
- Chemical Resistance, Good
- Wear Resistance, Good
- Fatigue Resistant
- Creep Resistance, Good
- Dimensional Stability, Good
- Friction, Low
- Thermal Stability, Good
Disadvantages of Acetal
Sensitive to thick sections and nonuniform part geometry. It may have voids, excess shrink or warp. Poor resistance to acids and bases. Price is average to high.
- Poor resistance to acids
- Subject to UV degradation
- Flammable
- Difficult to bond
- High specific gravity
Background of Acetal
The acetal polymer (POM) class was first introduced in 1956 and has achieved important application because of a good profile of properties. Two types of acetals available are a homopolymer and a copolymer with slightly different advantages for each. Acetals are available in fiber reinforced and lubricated molding grades as well as extruded shapes for machined parts.
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