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thyssenkrupp Engineered Plastics

Acetal Grades

thyssenkrupp Engineered Plastics offers Acetal plastic, a thermoplastic made from POM (polyoxymethylene) resin. Known for its excellent dimensional stability and ease of machining to close tolerances, Acetal exhibits unique properties such as minimal moisture absorption, high tensile strength, and low creep. These physical characteristics remain consistent across various environments and temperatures up to 180ºF. Alongside its exceptional abrasion resistance, Acetal plastic stands as one of the most widely utilized engineered plastics available. It is often preferred for replacing parts traditionally machined from metals.

Features and Benefits of Acetal

  • Excellent for general purpose parts in wet environments
  • Machines well to tight tolerances
  • Homopolymer and Copolymer versions available to fit different applications
  • Filled versions available
  • Available in FDA and USDA compliant grades

thyssenkrupp Engineered Plastics offers two primary versions of Acetal: homopolymer and copolymer. Chemically, these materials are approximately 90% identical; however, each variety offers its own unique benefits.

Acetal Homopolymer

  • Rigid
  • Thermoforms easily
  • Can be used in a wide variety of applications
  • Impact resistant
  • Good chemical resistant
  • Low moisture absorption
  • Stiffer than acetal copolymers with higher flexural modulus at ambient temperature and in elevated temperature applications
  • Higher impact strengths at both ambient temperature and low temperatures
  • Roughly 10-15% higher tensile strength and copolymers 
  • Higher continuous use temperature than copolymers (203°F vs. 194°F)

Acetal Copolymer

  • More flexible and pliable than homopolymer
  • Resistant to cracking at lower temperatures
  • No moisture absorption
  • FDA compliant
  • Can be welded
  • Can be bonded
  • Greater dimensional stability than acetal homopolymer due to lower crystallinity
  • Better chemical resistance with high pH solutions (bases)
  • Lower centerline porosity in extrusion

Additionally, filled versions of acetal are available to meet specific application requirements. These fillers, such as PTFE and glass fibers, enhance dimensional stability in acetal sheet and rod applications. Acetal is also offered with proprietary internal lubricants, further enhancing its wear resistance capabilities.

Other trade names for Acetal include: Celcon®, Delrin®, Ensital®, Pomalux®, Polyacetal®, POM (PolyOxyMethylene) Sustarin®, Tecaform®, Ultraform®, Unital®, and ZL 900. 

Jump to a specific grade
COPOLY ULTDET

COPLYFG

Copolymer Food Grade (COPLYFG) Acetal is tailored to meet food safety standards, making it an ideal choice for components in food processing and packaging equipment. Its excellent dimensional stability and durability ensure reliable performance in food contact applications.

Shapes Offered

COPOLY

Copolymer (COPOLY) Acetal offers flexibility and outstanding dimensional stability, making it well-suited for precision parts in variable environments. Its excellent chemical resistance and low moisture absorption make it ideal for durable, high-performance components across temperature extremes.

Shapes Offered

Plate Plate
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FDAAPR

FDA Approved (FDAAPR) Acetal Grade meets rigorous food contact standards, delivering both safety and compliance for food and pharmaceutical applications. With high tensile strength and low creep, this grade is ideal for critical components requiring consistent performance.

Shapes Offered

SD

Static Dissipative (SD) Acetal controls static electricity buildup, making it perfect for electronics and sensitive environments. This grade combines Acetal’s mechanical strength with static dissipative properties, ensuring reliable protection for delicate components.

Shapes Offered

ULTDET

Ultra Detectable (ULTDET) Acetal is designed with advanced detectability features to prevent contamination, making it ideal for components in food processing and packaging equipment, while still offering high strength and wear resistance for reliable performance.

Shapes Offered

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