描述
Hostaform C 27021 XAP is a very easy flowing, high-performance polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. The “XAP” designation indicates this is an innovative development grade with Advanced Processing characteristics, specifically engineered for injection molding applications requiring very low emissions and migrations.
Hostaform C 27021 XAP delivers a tensile modulus of 2,900 MPa, yield stress of 65 MPa, and yield strain of 7.5%, providing excellent mechanical performance for precision parts. The material exhibits outstanding resistance to long-term fatigue, chemicals (including solvents, fuel, and strong alkalis), wear, creep, hydrolysis, stress cracking, and thermal and oxidative degradation.
Hostaform C 27021 XAP is especially designed for consumer packaging and food contact applications. Monomers and additives are listed in EU Regulation (EU) 10/2011, and the material is FDA compliant according to 21 CFR 177.2470. The material meets very low emission standards, with VDA 275 emission levels below 2 mg/kg for natural grades. It complies with RoHS regulationsand is available globally in North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East.
Hostaform C 27021 XAP Key Features
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Very Easy Flow: MVR of 24 cm³/10min at 190°C/2.16kg – excellent flow for complex injection molded parts
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High Rigidity & Strength: Tensile modulus of 2,900 MPa and yield stress of 65 MPa
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Very Low Emissions: VDA 275 emission < 2 mg/kg (natural grades), suitable for automotive interior and packaging applications
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Low Migrations: Designed for consumer packaging with minimal extractables
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FDA Compliant: Complies with FDA 21 CFR 177.2470 for food contact applications
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EU Food Contact Compliant: Monomers and additives listed in EU Regulation (EU) 10/2011
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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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Low Moisture Absorption: Only 0.20% at equilibrium (50% RH), ensuring stable dimensions
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Added Release Agent: Contains release agent for easier demolding
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Regulatory Compliant: Meets RoHS, EU 10/2011, and FDA requirements
Hostaform C 27021 XAP Applications
Food Contact & Consumer Packaging: Bottle caps, food packaging, consumer goods requiring FDA compliance and low migration
Automotive Interior: Components requiring very low emissions (VDA 275 < 2 mg/kg) and chemical resistance
Precision Engineering: Gears, bearings, sliding elements requiring high precision, dimensional stability, and excellent flow for complex geometries
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
Technical Specifications
| Property | Test Condition | Standard | Value | Unit |
|---|---|---|---|---|
| Density | — | ISO 1183 | 1.41 | g/cm³ |
| Density of Melt | — | Internal | 1.20 | g/cm³ |
| 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, 23°C | ISO 62 | 0.20 | % |
| MVR (Melt Volume Rate) | 190°C/2.16kg | ISO 1133 | 24 | cm³/10min |
| Melt Flow Rate | 190°C/2.16kg | ISO 1133 | 24 | g/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 | % |
| 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 |
| Charpy Unnotched Impact | -30°C | ISO 179/1eU | 170 | kJ/m² |
| Ball Indentation Hardness | — | ISO 2039-1 | 147 | MPa |
| 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) | — | Internal | 0.155 | W/(m·K) |
| Specific Heat Capacity (Melt) | — | Internal | 2,210 | J/(kg·K) |
| Ejection Temperature | — | — | 140 | °C |
| Volume Resistivity | — | IEC 60093 | 1×10¹² | Ω·m |
| Surface Resistivity | — | IEC 60093 | 1×10¹⁴ | Ω |
| Dielectric Strength | — | IEC 60243-1 | 35 | kV/mm |
| Relative Permittivity (100Hz/1MHz) | — | IEC 60250 | 4.0/4.0 | — |
| Dissipation Factor (100Hz/1MHz) | — | IEC 60250 | 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 | FMVSS 302 | <100 | mm/min |
| Emission (VDA 275) | Natural grades | VDA 275 | <2 | mg/kg |
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 |
| Ejection Temperature | 140°C |
Hostaform C 27021 XAP FAQ
Q: What is Hostaform C 27021 XAP?
A: Hostaform C 27021 XAP is a very easy flow, low emission POM copolymer from Celanese for injection molding applications. XAP stands for innovative development products (X) with Advanced Processing (AP) characteristics.
Q: What does “XAP” mean in the grade name?
A: “XAP” indicates this is an innovative development grade with Advanced Processing characteristics, offering improved flow and processing performance.
Q: What is the flow rate of Hostaform C 27021 XAP?
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 XAP?
A: It offers tensile modulus of 2,900 MPa.
Q: Is this material FDA compliant?
A: Yes, Hostaform C 27021 XAP is FDA compliant according to 21 CFR 177.2470. Monomers and additives are also listed in EU Regulation (EU) 10/2011.
Q: What are the emission levels of this material?
A: Natural grades of Hostaform C 27021 XAP have very low emissions, with VDA 275 levels below 2 mg/kg.
Q: What applications is this material suitable for?
A: It is ideal for food contact packaging, bottle caps, automotive interior components, precision engineering parts, and consumer goods requiring low emissions and FDA compliance.
Q: Is drying required before processing?
A: General drying is not necessary due to low moisture absorption. In case of poor storage conditions, 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%.
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.
