描述
Hostaform C 36021 is a very high flow, unfilled polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. This grade is specifically engineered for injection molding applications requiring excellent flow characteristics, fast cycle times, and a good balance of mechanical properties.
Hostaform C 36021 delivers a tensile modulus of 2,800 MPa, yield stress of 68 MPa, and yield strain of 8%, providing good mechanical performance for 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.
The key differentiator of Hostaform C 36021 is its very high flow (MVR 31 cm³/10min at 190°C/2.16kg), which enables the production of complex, thin-wall components with shorter cycle times. This makes it particularly suitable for high-volume production where productivity and part quality are critical. Hostaform C 36021 complies with RoHS, PFOS, and PFOA regulations and is commercially available globally in North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East.
Hostaform C 36021 Key Features
-
Very High Flow: MVR of 31 cm³/10min at 190°C/2.16kg – exceptional flow for complex, thin-wall injection molded parts
-
Fast Cycle Times: High flow enables shorter cooling and cycle times for increased productivity
-
High Rigidity & Strength: Tensile modulus of 2,800 MPa and yield stress of 68 MPa
-
Good Impact Resistance: Charpy notched impact strength of 5 kJ/m² at 23°C
-
Good Chemical Resistance: Resists solvents, fuels, strong alkalis; good hydrolysis resistance
-
Excellent Fatigue & Creep Resistance: High resistance to long-term fatigue and creep under continuous load
-
Thermal & Oxidative Stability: High resistance to thermal and oxidative degradation over time
-
Good Heat Distortion Temperature: HDT of 103°C at 1.80 MPa
-
Low Moisture Absorption: Only 0.20% at equilibrium (50% RH), ensuring stable dimensions
-
Low Molding Shrinkage: 1.9% parallel, 1.8% normal for good dimensional control
-
Added Release Agent: Contains release agent for easier demolding
-
Regulatory Compliant: Meets RoHS, PFOS, and PFOA requirements
Related Products
Hostaform C 13021 – Standard High Rigidity POM Copolymer
Hostaform C 27021 XAP2 – Easy Flow Low Emission POM
Hostaform C 27021 XAP2 LS – UV Stabilized Low Emission POM
Hostaform C 2521 XAP2 – High Impact Toughness POM
Zytel ST801UV NC010 – Super Tough UV Stabilized PA66
Hostaform C 36021 Applications
Thin-Wall Injection Molding: Complex, thin-wall components requiring excellent flow and fast cycle times
Precision Engineering: Gears, bearings, sliding elements requiring high precision, dimensional stability, and good wear resistance
Electric & Electronic Industry: Connectors, relays, switches, coil formers requiring good electrical insulation and flow characteristics
Domestic Appliances: Gears, pump components, and moving parts in household appliances
High-Volume Production: Parts where fast cycle times and high productivity are critical
Hostaform C 36021 Technical Specifications
| Property | Test Condition | Standard | Value | Unit |
|---|---|---|---|---|
| Density | — | ISO 1183 | 1,410 | kg/m³ |
| Molding Shrinkage (Parallel) | — | ISO 294-4 | 1.9 | % |
| Molding Shrinkage (Normal) | — | ISO 294-4 | 1.8 | % |
| Water Absorption | Saturation, 23°C | ISO 62 | 0.65 | % |
| Humidity Absorption | 50% RH | Sim. to ISO 62 | 0.20 | % |
| MVR (Melt Volume Rate) | 190°C/2.16kg | ISO 1133 | 31 | cm³/10min |
| Tensile Modulus | 23°C | ISO 527 | 2,800 | MPa |
| Tensile Stress at Yield | 23°C, 50mm/min | ISO 527 | 68 | MPa |
| Tensile Strain at Yield | 23°C, 50mm/min | ISO 527 | 8 | % |
| Flexural Modulus | 23°C | ISO 178 | 2,800 | MPa |
| Flexural Stress at 3.5% | 23°C | ISO 178 | 76 | MPa |
| Charpy Notched Impact | 23°C | ISO 179/1eA | 5 | kJ/m² |
| Poisson’s Ratio | — | — | 0.37 | — |
| Melting Temperature | 10°C/min | ISO 11357-3 | 166 | °C |
| HDT (1.80 MPa) | Unannealed | ISO 75-1/-2 | 103 | °C |
| CLTE (Parallel) | — | ISO 11359 | 110×10⁻⁶ | 1/K |
| 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 | — | UL-94 | HB | — |
Processing Guide
| Parameter | Recommended Value |
|---|---|
| Drying Recommended | Normally not necessary; recommended for best surface finish |
| Drying Temperature | 100°C |
| Drying Time (Dehumidified Dryer) | 3 – 4 hours |
| Max. Moisture Content | ≤ 0.2% |
| Melt Temperature Optimum | 190°C |
| Melt Temperature Range | 180 – 200°C |
| Mold Temperature Optimum | 100°C |
| Mold Temperature Range | 80 – 120°C |
| Hold Pressure Range | 60 – 120 MPa |
| Back Pressure | 4 MPa |
| Max Screw Tangential Speed | ≤0.3 m/s |
Hostaform C 36021 FAQ
Q: What is Hostaform C 36021?
A: Hostaform C 36021 is a very high flow, unfilled POM copolymer from Celanese for injection molding applications requiring excellent flow characteristics, fast cycle times, and a good balance of mechanical properties.
Q: What is the flow rate of Hostaform C 36021?
A: It offers MVR of 31 cm³/10min at 190°C/2.16kg – very high flow for complex, thin-wall parts.
Q: What is the tensile modulus of Hostaform C 36021?
A: It offers tensile modulus of 2,800 MPa.
Q: What is the impact strength of this material?
A: It offers Charpy notched impact of 5 kJ/m² at 23°C.
Q: What makes Hostaform C 36021 different from other POM grades?
A: Its very high flow (MVR 31 cm³/10min) enables faster cycle times and production of complex thin-wall components compared to standard POM grades.
Q: Is drying required before processing?
A: Drying is normally not necessary. However, drying is recommended for the best surface finish.
Q: What are the recommended processing conditions?
A: Melt temperature 180–200°C (optimum 190°C), mold temperature 80–120°C (optimum 100°C), with maximum moisture content below 0.2%.
Q: What applications is this material suitable for?
A: It is ideal for thin-wall injection molded parts, fast-cycle precision components, gears, sliding elements, and electrical & electronic components.
Q: Is this material compliant with regulations?
A: Yes, Hostaform C 36021 complies with RoHS, PFOS, and PFOA regulations.
Q: Where is this material available?
A: It is available globally in North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East.
