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Plastics & Elastomers
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Plastics & Elastomers
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Hostaform® C 9021 20/4361

Technical Datasheet | Supplied by Celanese
Hostaform® C 9021 20/4361 is a crystalline polyacetal polyoxymethylene (POM) copolymer. Exhibits good resistance to chemicals (solvents, fuels & strong alkalis), wear, long-term fatigue, creep, hydrolysis, stress cracking, thermal and oxidative degradation. Possesses high rigidity, hardness, toughness, excellent resilience, good heat distortion temperature (to 100°C), thermal stability, good slip properties and low moisture absorption. Is suitable for processing by injection molding and sheet- & film extrusion. Used in automotive engineering, precision engineering, electric and electronic industry and domestic appliances. Complies with RoHS, PFOS and PFOA. Meets the recommendation XXXIII for consumer goods of the BgVV and UL flame ratings.
Product Type
POM (Polyacetal, Polyoxymethylene) > POM
Product Status
Applications/ Recommended for
  • Electronics / Computers
  • Engineering / manufacturing
  • Electrical markets
  • Appliances
  • Automotive
  • Injection molding - thermoplastics
  • Extrusion > Sheet & Plaques (standard)
  • Extrusion > Films (cast)

Hostaform® C 9021 20/4361 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Specific Gravity
1410 kg/m³
( )
ISO 1183
Melt Volume Flow Rate (MVR)
8 cm³/10 min
(190°C/2.16 kg)
ISO 1133
Water Absorption
0.65 %
(23°C, at saturation)
ISO 62

Hostaform® C 9021 20/4361 Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Suggested Max Moisture
0.15 %
Drying Time
3 - 4 hr
Drying Temperature
120 - 140 °C
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