MATERIAL SELECTION PROCESS

At Molded Dimensions, we know it's not always easy to pick an elastomer. There are many factors to consider. To assist our customers, our Engineers have developed a simple 9 step process to help you make an elastomer selection based on your custom application and specific requirements.

  1. Temperature information
    • Service Temperature Range (minimum, maximum)
  2. Service Environment
    • Ozone
    • Water
    • Oxygen
    • Special Fluids
    • Outdoor Weathering
  3. Make first cut on elastomer selection
  4. Physical Property Requirements
    • Durometer
    • Compression Set
    • Tear Strength
    • Resilience or Damping
    • Spring Rate or Modulus
    • Tensile Strength
    • Elongation
  5. Determine Probable Failure Mode
    • Fatigue Resistance
    • Heat/ Age/ Fluid Resistance
    • Tear/ Wear/ Abrasion Resistance
    • Hysteresis/ Heat Buildup Resistance
    • Impact Resistance
  6. Make second cut on elastomer selection
  7. Special Properties or Needs
    • Electrical - Conductivity/ Resistivity
    • Gas Permeability
    • Surface Friction
    • Flame - Resistance/ Optical Smoke Density
    • Food Service - FDA
    • Medical - Implant/ Skin Contact/ Outgassing
    • Marking/ Non-marking
    • Bonding to Substrates - Metal, Plastic, Fiber
  8. Elastomer Cost
    • Amount of Elastomer per Part - higher %, higher cost sensitivity
    • Part include Bonded Metal Insert - no inserts, higher cost sensitivity
  9. Make Final Elastomer Selection

We hope that this has made your material selection easier. If you require further assistance, do not hesitate to contact us. We will be glad to assist you.