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[Characteristics of ACETAL(ROM)]
Acetal (polyoxymethylenes-POM) is a crystalline
thermoplastic polymer with a high melting point. It offers
a high modulus of elasticity combined with great strength,
stiffness and resistance to abrasion. Moisture has little
to no effect on acetal resin, and because of this, the
dimensional stability of close tolerance fabricated items
is excellent. It is suitable for mechanical parts or
electrical insulators that require structural strength at
above normal temperatures.
Acetal provides high strength and stiffness coupled with
enhanced dimensional stability and ease of machining. As a
semi-crystalline material, acetal is also characterized by
a low coefficient of friction and good wear properties-
especially in wet environments.
Because acetal absorbs minimal amounts of moisture, its
physical properties remain constant in a variety of
environments. Low moisture absorption gives excellent
dimensional stability for close-tolerance machined parts.
In high moisture or submerged applications, acetal bearings
outperform nylon 4 to 1. Acetal is ideally suited for close
tolerance mechanical parts and electrical insulators which
require strength and stiffness. It also offers resistance
to a wide range of chemicals including many solvents.
In general, acetals do not perform as well in abrasive wear
applications as nylons. Compensation for moisture related
growth generally allows Nylatron nylons to be used for
wet, abrasive applications. If your application requires
dimensional consistency in an abrasive, high humidity or
submerged environment, Ertalyte PET-P will often offer
improved performance.
[Feature]
- Low moisture absorption
- High strength stiffness
- Easy to machine
- Many formulation options: Copolymer, Homopolymer, Teflon filled, and Internally
lubricated/enhanced wear grade
- High modules of elasticity
- High strength and stiffness
- Low coefficient of friction
- Easily fabricated with hand tools and automatic production machinery
- Good abrasion and impact resistance
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