CELANESE HOSTAFORM C 9021 TF Modified POM Resin

Physical Properties

• Density: Measured per ISO 1183, the material’s density is 1.51 g/cc (0.0546 lb/in³), specifying its mass per unit volume for characterization.
• 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 dimensional accuracy in injection molding.
• Linear Mold Shrinkage, Transverse: Per ISO 294-4, transverse shrinkage is 0.017 cm/cm (0.017 in/in), highlighting directional variation in component contraction.
• Melt Flow: Under ISO 1133 at 190°C/2.16 kg, the melt flow rate is 6.0 g/10 min [cm³/10min], showing suitability for injection molding processes.

Polymer Properties:

1. Base Material: Polyoxymethylene (POM) Copolymer
2. Modification Features:
   
   • Incorporates Hostaflon (PTFE), which significantly reduces the friction coefficient, making it ideal for paired sliding parts in maintenance – free bearings.
   • Retains the good chemical resistance of standard POM copolymers against solvents, fuels, and strong alkalis.
   • Exhibits high resistance to thermal and oxidative degradation, ensuring long – term stability.
   • Offers excellent hydrolysis resistance, maintaining its integrity in humid environments.

Applications:

Given its specialized properties, Celanese Hostaform C 9021 TF is extensively used in wear-critical applications where friction, noise, and the need for external lubrication must be minimized.

• Sliding and Bearing Systems
  
  • Description: This material excels in components designed for linear or rotational motion, often serving as a lightweight and quiet alternative to metal parts by eliminating the need for grease or oil.
  • Benefits: The PTFE modification provides inherent self-lubrication, leading to significantly reduced friction and extended service life. This is particularly valuable in “dry running” conditions.
  • Examples: Plain bearings, sliding guides, low-load gears, conveyor rollers, and intricate sliding mechanisms in consumer appliances, furniture, and window/door systems.
• Automotive Industry
  
  • Description: Utilized in various automotive components that demand smooth, quiet operation, and high durability under diverse environmental conditions.
  • Benefits: Its superior wear resistance and excellent chemical resistance to typical automotive fluids (e.g., fuels, oils) make it ideal for demanding under-the-hood and interior applications.
  • Examples: Components within seat adjustment mechanisms, sunroof systems, power window guides, gearshift linkages, HVAC actuators, and mirror systems.
• Precision Engineering
  
  • Description: Employed in the manufacture of intricate parts that require tight tolerances and consistent performance, even under moderate mechanical loads.
  • Benefits: The material’s good dimensional stability, high stiffness, and excellent processability enable the production of highly precise molded parts.
  • Data Point: Typical Molding Shrinkage ranges from 1.8% to 2.1% (ISO 294-4, 2577), allowing for predictable and accurate part dimensions in complex designs.
  • Examples: Small gears, cams, levers, and other moving parts in printers, cameras, medical devices, and other sensitive instruments.
• Consumer Goods and Appliances
  
  • Description: Found in household appliances and various consumer products where durability, smooth tactile feel, and quiet operation are essential for user satisfaction.
  • Benefits: Its inherent lubricity reduces operational noise and enhances the overall user experience by ensuring effortless motion.
  • Examples: Internal components in washing machines, dishwashers, coffee makers, food processors, and other small appliances that feature moving parts or require reliable, low-friction operation.
• Other Specialized Applications
  
  • Sports Equipment: Components in ski bindings, fishing reels, and bicycle parts where smooth action, durability, and resistance to environmental factors are critical.
  • Fluid Handling Systems: Parts within pumps, valves, and metering devices that require both good chemical resistance and low friction for efficient operation and extended life.