描述
Hostaform C 13021 is an unfilled, crystalline polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. This grade is specifically engineered for precision injection molding applications requiring high rigidity, hardness, toughness, and excellent dimensional stability .
Hostaform C 13021 exhibits outstanding resistance to long-term fatigue and chemicals, including solvents, fuels, and strong alkalis. The material also demonstrates resistance to wear, creep, hydrolysis, stress cracking, and thermal and oxidative degradation . It possesses high resilience, good heat distortion temperature up to 100°C, thermal stability, and good slip properties. Due to its low moisture absorption (0.20% at equilibrium), it maintains stable dimensions in varying humidity environments .
Hostaform C 13021 contains a release agent additive for enhanced processing and is suitable for injection molding applications . It complies with RoHS, PFOS, and PFOA regulations and meets the recommendation XXXIII for consumer goods of the BgVV .
Hostaform C 13021 Key Features
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High Rigidity & Strength: Tensile modulus of 2,900 MPa and yield stress of 65 MPa, providing excellent mechanical performance for structural precision parts
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Good Chemical Resistance: Resists solvents, fuels, strong alkalis, and provides good hydrolysis resistance
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Excellent Fatigue & Creep Resistance: High resistance to long-term fatigue and creep under continuous load
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Good Heat Distortion Temperature: HDT of 106°C at 1.80 MPa, suitable for applications up to 100°C
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Low Moisture Absorption: Only 0.2% at equilibrium (50% RH), ensuring stable dimensions and properties in humid environments
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Good Slip Properties: Low coefficient of friction, suitable for moving/sliding parts
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Thermal & Oxidative Stability: Formulated to resist thermal and oxidative degradation over time
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Added Release Agent: Contains release agent additive for easier demolding during injection molding
Related Products
Hostaform C 13021 Applications
Automotive Engineering: Precision gears, window regulator mechanisms, seat belt components, fuel system parts, door lock components, sliding elements requiring wear resistance and dimensional stability
Precision Engineering: Gears, bearings, sliding elements, mechanical components requiring high precision and dimensional stability
Electric & Electronic Industry: Connectors, relays, switches, coil formers, and electrical components requiring good electrical insulation properties
Domestic Appliances: Gears, pump components, and moving parts in household appliances
Hostaform C 13021 Technical Specifications
| Property | Test Condition | Standard | Value | Unit |
|---|---|---|---|---|
| Density | — | ISO 1183 | 1,410 | kg/m³ |
| Molding Shrinkage (Parallel) | — | ISO 294-4 | 2.0 | % |
| Molding Shrinkage (Normal) | — | ISO 294-4 | 1.8 | % |
| Water Absorption | Saturation, 23°C, 2mm | ISO 62 | 0.65 | % |
| Humidity Absorption | 50% RH, 2mm | Sim. to ISO 62 | 0.20 | % |
| MVR (Melt Volume Rate) | 190°C/2.16kg | ISO 1133 | 12 | cm³/10min |
| Tensile Modulus | 23°C | ISO 527-1/-2 | 2,900 | MPa |
| Tensile Stress at Yield | 23°C, 50mm/min | ISO 527 | 65 | MPa |
| Tensile Strain at Yield | 23°C, 50mm/min | ISO 527 | 9 | % |
| Nominal Strain at Break | 23°C, 50mm/min | ISO 527 | 25 | % |
| Flexural Modulus | 23°C | ISO 178 | 2,800 | MPa |
| Charpy Notched Impact | 23°C | ISO 179/1eA | 6.5 | kJ/m² |
| Charpy Notched Impact | -30°C | ISO 179/1eA | 6.0 | kJ/m² |
| Charpy Unnotched Impact | 23°C | ISO 179/1eU | 200 | kJ/m² |
| HDT (1.80 MPa) | Unannealed | ISO 75-1/-2 | 106 | °C |
| Melting Temperature | 10°C/min | ISO 11357-3 | 166 | °C |
| CLTE (Parallel) | — | ISO 11359-1/-2 | 110×10⁻⁶ | 1/K |
| Ejection Temperature | — | — | 140 | °C |
| Volume Resistivity | — | IEC 62631-3-1 | 1×10¹² | Ω·m |
| Surface Resistivity | — | IEC 62631-3-2 | 1×10¹⁴ | Ω |
| Dielectric Strength | — | IEC 60243-1 | 35 | kV/mm |
| Relative Permittivity (100Hz/1MHz) | — | IEC 62631-2-1 | 4.0/4.0 | — |
| Dissipation Factor (100Hz/1MHz) | — | IEC 62631-2-1 | 20/50 | ×10⁻⁴ |
| CTI (Comparative Tracking Index) | — | IEC 60112 | 600 | V |
| UL Flammability | 1.5-3.0mm | UL-94 | HB | — |
| FMVSS Burning Rate | 1mm | ISO 3795 | <75 | mm/min |
Processing Guide
| Parameter | Recommended Value |
|---|---|
| Drying Recommended | Generally not necessary due to low moisture absorption |
| Drying Temperature (if needed) | 100 – 120°C |
| Drying Time (if needed) | 3 – 4 hours |
| Max. Moisture Content | < 0.15% |
| Melt Temperature Optimum | 190 – 210°C |
| Melt Temperature Range | 190 – 215°C |
| Mold Temperature Optimum | 100°C |
| Mold Temperature Range | 80 – 120°C |
| Holding Pressure Range | 600 – 1,200 bar |
| Back Pressure | Low (for standard injection molding) |
Hostaform C 13021 FAQ
Q: What is Hostaform C 13021?
A: Hostaform C 13021 is an unfilled, crystalline POM copolymer from Celanese for injection molding requiring high rigidity, hardness, toughness, and good chemical resistance .
Q: What is the tensile modulus of Hostaform C 13021?
A: It offers tensile modulus of 2,900 MPa .
Q: Is Hostaform C 13021 FDA compliant?
A: For food contact compliance, the food grade variant Hostaform C 13021 FC is available, which complies with EU and FDA food contact regulations . Standard C 13021 may not be FDA compliant; consult datasheet or Celanese for confirmation.
Q: What does “C 13021” designation mean?
A: “C” indicates copolymer POM. The numeric code represents the specific formulation.
Q: What additives are included?
A: It contains a release agent to facilitate demolding .
Q: What are the recommended processing conditions?
A: Melt temperature 190–210°C, mold temperature 80–120°C, with material dried to below 0.15% moisture if necessary .
Q: Is this material UV stabilized?
A: For UV stabilized applications, Hostaform C 13021 LS is available .
Q: What applications is this material suitable for?
A: It is widely used in automotive precision gears, window regulators, connectors, relays, and domestic appliance components .
Product Overview
For related grades, check out our Hostaform C 9021 product page or Zytel ST801UV NC010 product page.
