CELANESE HOSTAFORM C 9021 LS Modified POM Resin

Physical Properties

• Density: Measured per ISO 1183, the material’s density is 1.41 g/cc (0.0509 lb/in³), specifying its mass per unit volume for standard evaluation.
• Water Absorption at Saturation: As per ISO 62, the material retains 0.65% water at saturation, indicating low moisture uptake when fully immersed.
• Linear Mold Shrinkage, Flow: By ISO 294-4, flow-direction shrinkage is 0.020 cm/cm (0.020 in/in), critical for ensuring dimensional accuracy in injection molding.
• Linear Mold Shrinkage, Transverse: Per ISO 294-4, transverse shrinkage is 0.018 cm/cm (0.018 in/in), highlighting directional variation in component contraction during cooling.
• Melt Flow: Under ISO 1133 at 190°C/2.16 kg, the melt flow rate is 8.0 g/10 min [cm³/10min], showing suitability for standard injection molding processes.

Polymer Properties:

1. Base Material: Polyoxymethylene (POM) Copolymer
2. Modification Features:
   
   • UV – stabilized with UV stabilizers and carbon black, enhancing outdoor durability.
   • Exhibits good resistance to solvents, fuels, and strong alkalis.
   • High resistance to thermal and oxidative degradation.
   • Offers good hydrolysis resistance.
   • Possesses high rigidity, hardness, and toughness.

Applications:

Hostaform® C 9021 LS is widely used across industries due to its robust mechanical, chemical, and environmental properties. Its applications include:

1. Automotive Engineering:
   • Exterior Components: Used in parts like mirror housings, wiper components, and exterior trim, where UV resistance and weatherability are critical due to prolonged sun exposure.
   • Fuel System Components: Its resistance to fuels and solvents makes it suitable for fuel pump housings, fuel line connectors, and valve components.
   • Interior Parts: Applied in seatbelt mechanisms, dashboard components, and clips, leveraging its rigidity, toughness, and low wear properties.
   • Under-the-Hood Applications: Used in parts exposed to heat and chemicals, such as coolant system components or sensor housings, due to its thermal stability and hydrolysis resistance.
2. Precision Engineering:
   • Gears and Bearings: The material’s low friction and wear resistance make it ideal for precision gears, bushings, and bearings in mechanical assemblies.
   • Fasteners and Clips: Its high rigidity and resilience are suited for snap-fit connectors, clips, and fasteners requiring repeated engagement without deformation.
   • Springs and Levers: Excellent fatigue resistance supports applications in small springs or levers in precision devices.
3. Electrical and Electronic Industry:
   • Connectors and Housings: Used in electrical connectors, switch housings, and enclosures due to its dimensional stability, low moisture absorption, and chemical resistance.
   • Insulating Components: Its high resistivity and dielectric strength make it suitable for insulating parts in electronic devices.
   • Outdoor Electronics: UV stabilization ensures longevity in outdoor electrical components like sensor casings or lighting fixtures.
4. Domestic Appliances:
   • Washing Machine and Dishwasher Parts: Components like pump housings, valves, and detergent dispensers benefit from hydrolysis and chemical resistance.
   • Kitchen Appliances: Used in coffee machine parts, blender components, and food processor gears due to its durability and compliance with consumer goods standards.
   • Handles and Knobs: Its toughness and aesthetic finish (with carbon black for UV-stabilized black coloring) make it suitable for ergonomic handles and knobs.
5. Industrial Applications:
   • Conveyor Systems: Components like rollers, guides, and chain links utilize its low friction and wear resistance.
   • Pipes and Fittings: Its chemical and hydrolysis resistance supports use in fluid-handling systems for industrial or agricultural settings.
   • Outdoor Equipment: Parts for lawnmowers, irrigation systems, or power tools benefit from UV and weather resistance.
6. Consumer Goods:
   • Sporting Equipment: Used in components like ski bindings, fishing reel parts, or bicycle fittings due to its toughness and UV stability.
   • Luggage and Zippers: Its resilience and wear resistance make it suitable for zipper sliders and luggage hardware.
   • Toys: Applied in durable, high-precision toy components that require safety compliance and resistance to wear.

Processing and Design Considerations

• Injection Molding: Hostaform® C 9021 LS is optimized for injection molding, offering medium flowability for complex geometries and thin-walled parts. 
• Design Flexibility: Its low shrinkage and dimensional stability allow for tight tolerances in precision components.
• Surface Finish: Provides a smooth surface with good aesthetic properties, especially in UV-stabilized black variants.

Certifications and Compliance

• UL Yellow Cards: Ensures globally recognized safety and quality standards, making it suitable for regulated industries like automotive and electronics.
• RoHS, PFOS, PFOA Compliance: Safe for use in consumer goods and environmentally sensitive applications.
• Burning Rate: Meets ISO 3795 and FMVSS 302 standards for automotive flammability requirements.