描述
Hostaform C 13031 is an unfilled, crystalline polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. This easy flow grade is specifically engineered for injection molding applications requiring increased strength, rigidity, and hardness compared to standard grades like C 13021 .
Hostaform C 13031 delivers a tensile modulus of 3,050 MPa and yield stress of 68 MPa, providing superior mechanical performance for demanding precision parts . The material exhibits outstanding resistance to long-term fatigue, chemicals (including solvents, fuels, and strong alkalis), wear, creep, hydrolysis, stress cracking, and thermal and oxidative degradation .
Due to its easy flow characteristics, Hostaform C 13031 is particularly suitable for complex and thin-wall injection molded parts. The material meets BOSCH N28 BN22-O025 automotive specifications and is available globally including North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East .
Hostaform C 13031 Key Features
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Higher Strength & Rigidity: Tensile modulus of 3,050 MPa and yield stress of 68 MPa – superior to C 13021
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Easy Flow: Excellent flowability for complex and thin-wall injection molded parts
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Good Chemical Resistance: Resists solvents, fuels, strong alkalis; good hydrolysis resistance
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Thermal & Oxidative Stability: Formulated to resist thermal and oxidative degradation over time
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Good Heat Distortion Temperature: HDT of 107°C at 1.80 MPa
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Low Moisture Absorption: Only 0.2% at equilibrium (50% RH), ensuring stable dimensions
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Added Release Agent: Contains release agent additive for easier demolding
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Automotive Approved: Meets BOSCH N28 BN22-O025 specification
Related Products
Hostaform C 13031 Applications
Automotive Engineering: Fuel system components, precision gears, window regulator mechanisms, seat belt components, door lock components requiring higher strength and fuel contact resistance. Meets BOSCH N28 BN22-O025 specification .
Precision Engineering: Gears, bearings, sliding elements, mechanical components requiring high precision, dimensional stability, and complex geometries enabled by easy flow.
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.
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 | 3,050 | MPa |
| Tensile Stress at Yield | 23°C, 50mm/min | ISO 527 | 68 | MPa |
| Tensile Strain at Yield | 23°C, 50mm/min | ISO 527 | 8 | % |
| Nominal Strain at Break | 23°C, 50mm/min | ISO 527 | 20-28 | % |
| Flexural Modulus | 23°C | ISO 178 | 3,000 | MPa |
| Charpy Notched Impact | 23°C | ISO 179/1eA | 6.7 | 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 | 107 | °C |
| HDT (0.45 MPa) | Unannealed | ISO 75 | 161 | °C |
| Melting Temperature | 10°C/min | ISO 11357-3 | 170 | °C |
| CLTE (Parallel) | — | ISO 11359 | 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 | — |
Processing Guide
| Parameter | Recommended Value |
|---|---|
| Drying Recommended | Generally not necessary; drying may be required if storage conditions are poor |
| Drying Temperature (if needed) | 100 – 120°C |
| Drying Time (if needed) | 3 – 6 hours |
| Max. Moisture Content | ≤ 0.2% |
| Melt Temperature Optimum | 200°C |
| Melt Temperature Range | 190 – 210°C |
| Mold Temperature Optimum | 100°C |
| Mold Temperature Range | 80 – 120°C |
| Holding Pressure Range | 60 – 120 MPa |
| Back Pressure | ~4 MPa |
Hostaform C 13031 FAQ
Q: What is Hostaform C 13031?
A: Hostaform C 13031 is an easy flow, unfilled POM copolymer from Celanese for injection molding requiring increased strength, rigidity, and hardness compared to standard grades .
Q: What is the difference between Hostaform C 13031 and C 13021?
A: Hostaform C 13031 offers higher strength, rigidity, and hardness over the entire permissible temperature range compared to C 13021, while maintaining easy flow characteristics .
Q: What is the tensile modulus of Hostaform C 13031?
A: It offers tensile modulus of 3,050 MPa .
Q: What automotive specifications does this material meet?
A: It meets BOSCH N28 BN22-O025 automotive specification .
Q: Is drying required before processing?
A: Drying is generally not necessary due to low moisture absorption. However, if storage conditions have been poor, drying at 100–120°C for 3–6 hours is recommended .
Q: What are the recommended processing conditions?
A: Melt temperature 190–210°C (optimum 200°C), mold temperature 80–120°C (optimum 100°C), with holding pressure 60–120 MPa .
Q: Is this material FDA compliant?
A: Yes, specific variants such as Hostaform C 13031 90/5840 comply with FDA (21 CFR 177.2470) regulations . Please verify with Celanese for the exact variant.
