描述
Hostaform C 27021 LS colored is a very easy flowing, UV stabilized, mass colored polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. This grade is specifically engineered for injection molding applications requiring excellent flow characteristics, UV resistance, and good mechanical performance .
Hostaform C 27021 LS colored delivers a tensile modulus of 2,900 MPa and yield stress of 65 MPa, providing good mechanical performance for precision parts . The material is UV stabilized (LS designation) and mass colored, making it particularly suitable for applications exposed to UV/weather conditions .
The material exhibits good chemical resistance to solvents, fuel, and strong alkalis, as well as good hydrolysis resistance and high resistance to thermal and oxidative degradation . Hostaform C 27021 LS colored meets FORD WSK-M4D840-A3 automotive specification and is available globally in North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East .
Hostaform C 27021 LS colored Key Features
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Very Easy Flow: MVR of 24 cm³/10min at 190°C/2.16kg – high flow for complex injection molded parts
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UV Stabilized: LS designation indicates light stabilization for applications requiring UV/weather resistance
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Mass Colored: Pre-colored resin eliminates secondary coloring operations
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High Rigidity: Tensile modulus of 2,900 MPa and yield stress of 65 MPa
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Good Chemical Resistance: Resists solvents, fuel, strong alkalis; good hydrolysis resistance
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Thermal & Oxidative Stability: High resistance to thermal and oxidative degradation over time
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Good Heat Distortion Temperature: HDT of 106°C at 1.80 MPa
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Fast Cycling: Low melt viscosity enables fast cycling in production
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Added Release Agent: Contains release agent for easier demolding
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Regulatory Compliant: Meets RoHS, PFOS, PFOA requirements and FORD WSK-M4D840-A3 specification
Related Products
Hostaform C 27021 LS colored Applications
Automotive Interior & Exterior: Components requiring UV resistance and low emissions; meets FORD WSK-M4D840-A3 specification
Electronics & Electrical: Connectors, switches, precision components exposed to UV/weather conditions
Injection Molded Complex Parts: Thin-wall and complex geometries enabled by very easy flow characteristics (MVR 24 cm³/10min)
UV-Exposed Precision Parts: Gears, sliding elements, mechanical components requiring UV stability and dimensional stability
Hostaform C 27021 LS colored 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 | Sim. to ISO 62 | 0.65 | % |
| Humidity Absorption | 50% RH | Sim. to ISO 62 | 0.20 | % |
| MVR (Melt Volume Rate) | 190°C/2.16kg | ISO 1133 | 24 | cm³/10min |
| Tensile Modulus | 23°C | ISO 527 | 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 | 7.5 | % |
| Nominal Strain at Break | 23°C | ISO 527 | 17 | % |
| Flexural Modulus | 23°C | ISO 178 | 2,800 | MPa |
| Tensile Creep Modulus (1h) | — | ISO 899-1 | 2,500 | MPa |
| Tensile Creep Modulus (1000h) | — | ISO 899-1 | 1,300 | MPa |
| Charpy Notched Impact | 23°C | ISO 179/1eA | 5.5 | kJ/m² |
| Charpy Notched Impact | -30°C | ISO 179/1eA | 5.5 | kJ/m² |
| Charpy Unnotched Impact | 23°C | ISO 179/1eU | 170 | kJ/m² |
| Ball Indentation Hardness | H 358/30 | ISO 2039-1 | 147 | MPa |
| Poisson’s Ratio | — | — | 0.37 | — |
| 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 | 110×10⁻⁶ | 1/K |
| Thermal Conductivity (Melt) | — | ISO 22007-2 | 0.155 | W/(m·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 | 25/50 | ×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 due to low moisture absorption |
| 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 |
| Hold Pressure Range | 60 – 120 MPa |
| Back Pressure | 4 MPa |
| Max Screw Tangential Speed | ≤0.3 m/s |
| Screw L/D Ratio | 15:1 – 25:1 |
Hostaform C 27021 LS colored FAQ
Q: What is Hostaform C 27021 LS colored?
A: Hostaform C 27021 LS colored is a very easy flowing, UV stabilized, mass colored POM copolymer from Celanese for injection molding applications requiring UV resistance and good flow characteristics.
Q: What does “LS” and “colored” mean in the grade name?
A: “LS” stands for Light Stabilized (UV stabilized), indicating the material offers UV/weather resistance. “colored” indicates the material is mass colored (color compounded) for applications requiring pre-colored parts.
Q: What is the flow rate of Hostaform C 27021 LS colored?
A: It offers MVR of 24 cm³/10min at 190°C/2.16kg – very easy flow for complex parts.
Q: What is the tensile modulus of Hostaform C 27021 LS colored?
A: It offers tensile modulus of 2,900 MPa.
Q: Is drying required before processing?
A: General drying is not necessary due to low moisture absorption. In case of poor storage conditions (water contact or condensed water), 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 maximum moisture content below 0.2%.
Q: What automotive specifications does this material meet?
A: It meets FORD WSK-M4D840-A3 automotive specification.
Q: Is this material compliant with regulations?
A: Yes, it complies with RoHS, PFOS, and PFOA regulations.
Disclaimer
All technical data and information provided on this page are compiled from Celanese official TDS, technical documents, and publicly available sources for reference only and are not binding product specifications. Customers must conduct independent trial production tests matching your own production environment and equipment before mass purchasing. Product indicators, processing parameters, and properties may slightly fluctuate among different production batches. Celanese Corporation reserves the right to update specifications without prior notice. It is the customer’s responsibility to verify that the product is suitable for their intended application and complies with all applicable regulations and industry standards.
