描述
Hostaform C 27021 XAP2 LS is an easy-flowing, high-performance polyacetal polyoxymethylene (POM) copolymer supplied by Celanese Corporation. This grade is specifically engineered for injection molding applications requiring reduced emissions and improved UV resistance, making it particularly suitable for automotive interior components . The “XAP2” designation indicates an innovative development grade with Advanced Processing characteristics and second-generation improved formulation, while “LS” stands for Light Stabilized (UV stabilized).
Hostaform C 27021 XAP2 LS delivers a tensile modulus of 2,750 MPa, yield stress of 64 MPa, and nominal strain at break of 17%, 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 differentiators of Hostaform C 27021 XAP2 LS are its very low emission profile and UV stability. Emissions according to VDA 275 are below 5 mg/kg , and the material offers improved UV resistance for long-term durability in light-exposed applications . The material also meets FMVSS 302 burning rate standards (<100 mm/min at 1 mm thickness) . Hostaform C 27021 XAP2 LS complies with RoHS, PFOS, and PFOA regulations and meets the recommendation XXXIII for consumer goods of the BgVV . It meets MERCEDES BENZ DBL 5404 automotive specification and is commercially available globally in North America, Europe, Asia Pacific, Latin America, Africa, and the Middle East .
Hostaform C 27021 XAP2 LS Key Features
-
Easy Flow: MVR of 24 cm³/10min at 190°C/2.16kg – excellent flow for complex injection molded parts
-
UV Stabilized: LS designation indicates light stabilization for applications requiring UV/weather resistance
-
Very Low Emissions: VDA 275 emission < 5 mg/kg, suitable for automotive interior applications
-
High Rigidity & Strength: Tensile modulus of 2,750 MPa and yield stress of 64 MPa
-
Good Impact Resistance: Charpy notched impact strength of 5.5 kJ/m² at 23°C and -30°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: Melting temperature of 166°C
-
Low Moisture Absorption: Only 0.20% at equilibrium (50% RH), ensuring stable dimensions
-
Good Slip Properties: Low coefficient of friction, suitable for moving/sliding parts
-
Added Release Agent: Contains release agent for easier demolding
-
Regulatory Compliant: Meets RoHS, PFOS, PFOA, BgVV, FMVSS 302, and MERCEDES BENZ DBL 5404 requirements
Related Products
Hostaform C 13021 – Standard High Rigidity POM Copolymer
Hostaform C 27021 XAP2 – Easy Flow Low Emission POM
Hostaform C 27021 XAP C – FDA Compliant POM for Consumer Packaging
Hostaform C 27021 AS – Very Easy Flow Antistatic POM
Zytel ST801UV NC010 – Super Tough UV Stabilized PA66
Hostaform C 27021 XAP2 LS Applications
Automotive Interior: Components requiring very low emissions (VDA 275 < 5 mg/kg) and UV stability; meets MERCEDES BENZ DBL 5404 specification
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
Injection Molded Complex Parts: Thin-wall and complex geometries enabled by easy flow characteristics
Technical Specifications
| Property | Test Condition | Standard | Value | Unit |
|---|---|---|---|---|
| Density | 23°C | ISO 1183 | 1.41 | g/cm³ |
| Water Absorption | Saturation, 23°C | ISO 62 | 0.65 | % |
| Humidity Absorption | 2mm, 50% RH | Sim. to ISO 62 | 0.20 | % |
| MVR (Melt Volume Rate) | 190°C/2.16kg | ISO 1133 | 24 | cm³/10min |
| Molding Shrinkage (Parallel) | — | ISO 294-4 | 2.1 | % |
| Molding Shrinkage (Normal) | — | ISO 294-4 | 2.0 | % |
| Tensile Modulus | 23°C | ISO 527 | 2,750 | MPa |
| Tensile Stress at Yield | 23°C, 50mm/min | ISO 527 | 64 | MPa |
| Tensile Strain at Yield | 23°C, 50mm/min | ISO 527 | 7.5 | % |
| Nominal Strain at Break | 23°C, 50mm/min | ISO 527 | 17 | % |
| Flexural Modulus | 23°C | ISO 178 | 2,600 | MPa |
| Tensile Creep Modulus (1h) | — | ISO 899-1 | 2,400 | MPa |
| Tensile Creep Modulus (1000h) | — | ISO 899-1 | 1,200 | 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 |
| Charpy Unnotched Impact | -30°C | ISO 179/1eU | 170 | kJ/m² |
| Melting Temperature | 10°C/min | ISO 11357-3 | 166 | °C |
| CLTE (Parallel) | — | ISO 11359 | 110×10⁻⁶ | 1/K |
| CLTE (Transverse) | — | 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 | — |
| FMVSS Burning Rate | 1mm | FMVSS 302 | <100 | mm/min |
| Emission (VDA 275) | — | VDA 275 | <5 | mg/kg |
Processing Guide
| Parameter | Recommended Value |
|---|---|
| Drying Recommended | Yes (to achieve low emission values) |
| Drying Temperature | 100 – 120°C |
| Drying Time (Recirculating Air Dryer) | 3 – 6 hours |
| Max. Layer Thickness | 40 mm |
| Max. Moisture Content | ≤ 0.2% |
| Feed Temperature | 60 – 80°C |
| Melt Temperature Optimum | 190 – 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 |
Hostaform C 27021 XAP2 LS FAQ
Q: What is Hostaform C 27021 XAP2 LS?
A: Hostaform C 27021 XAP2 LS is an easy flow, UV stabilized, low emission POM copolymer from Celanese for injection molding applications, especially automotive interior components .
Q: What does “XAP2 LS” mean in the grade name?
A: “XAP” stands for Advanced Processing, indicating enhanced flow and processing characteristics. “XAP2” denotes a second-generation improved formulation. “LS” stands for Light Stabilized (UV stabilized) .
Q: What are the emission levels of this material?
A: Hostaform C 27021 XAP2 LS has VDA 275 emission levels below 5 mg/kg .
Q: Is this material UV stabilized?
A: Yes, the “LS” designation indicates the material offers improved UV resistance for applications requiring long-term light stability .
Q: What is the flow rate of Hostaform C 27021 XAP2 LS?
A: It offers MVR of 24 cm³/10min at 190°C/2.16kg – easy flow for complex parts .
Q: What is the tensile modulus of Hostaform C 27021 XAP2 LS?
A: It offers tensile modulus of 2,750 MPa .
Q: What is the impact strength of this material?
A: It offers Charpy notched impact of 5.5 kJ/m² at both 23°C and -30°C .
Q: What automotive specifications does this material meet?
A: It meets MERCEDES BENZ DBL 5404 automotive specification and FMVSS 302 burning rate standards (<100 mm/min at 1mm thickness) .
Q: Is drying required before processing?
A: Yes, drying is recommended to achieve low emission values. Use a recirculating air dryer at 100–120°C for 3–6 hours with a maximum layer thickness of 40 mm .
Q: What are the recommended processing conditions?
A: Melt temperature 190–210°C, mold temperature 80–120°C, with feed temperature 60–80°C .
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.
