DUPONT DELRIN 525GR POM Resin

Physical Properties

• Density: Measured per ISO 1183, the material’s density is 1.59 g/cc (0.0574 lb/in³), specifying mass per unit volume for material evaluation.
• Water Absorption: At 2.00 mm thickness (sim. ISO 62), water absorption is 1.26%, indicating moderate-high moisture retention under immersion.
• Moisture Absorption: At 2.00 mm thickness (sim. ISO 62), moisture absorption is 0.170%, showing low atmospheric water uptake.
• Linear Mold Shrinkage, Flow: By ISO 294-4/2577, flow-direction shrinkage is 0.0040 cm/cm (0.0040 in/in), critical for tight dimensional control.
• Linear Mold Shrinkage, Transverse: Per ISO 294-4/2577, transverse shrinkage is 0.012 cm/cm (0.012 in/in), highlighting significant directional contraction variation.
• Melt Flow: Under ISO 1133 at 190°C/2.16 kg, the melt flow rate is 8.0 g/10 min, reflecting standard processability for injection molding.

Polymer Properties:

1. Base Material: Polyoxymethylene (POM)
2. Reinforcement: 25% Glass Fiber
3. Modification Features
   
   • 25% glass fiber reinforcement significantly boosts strength and stiffness.
   • High deflection temperature enables use in elevated – heat environments.
   • Excellent creep resistance ensures long – term dimensional stability under load.
   • Medium viscosity facilitates smooth injection molding process.

Applications:

The combination of very high stiffness, strength, and creep resistance makes Delrin 525GR a top choice for demanding structural and load-bearing applications.

• Automotive Under-the-Hood Parts: Ideal for components like air intake manifolds, brackets, and housings that require high strength and dimensional stability at elevated temperatures.
• Industrial and Machinery Components: Used for structural parts, bearing cages, and precision gears that are subjected to high loads and need to resist long-term deformation.
• Power Tool Casings: Suitable for parts that require high rigidity to protect internal components and maintain structural integrity.
• Structural Components in Consumer Goods: Employed in parts that serve a structural function in appliances, furniture, and other consumer products.

Processing Guidelines

Delrin 525GR is optimized for injection molding. Proper drying is crucial to ensure optimal processing and part quality.

• Drying: Due to the glass filler, proper drying is critical. It is recommended to pre-dry the material at 80°C for 2-4 hours.
• Melt Temperature: 200-220°C
• Mold Temperature: 80-120°C
• Note: The glass fibers can be abrasive. It is recommended to use hardened tool steel for molds and screw and barrel systems designed for glass-filled materials.