Moisture Absorption in Vehicle Suspension Components

At PolySource, we pride ourselves on the technical problem-solving abilities of our consultants in the field. We consistently aim to provide the best solutions for our customers, which is why our field experts are trained at every level of plastic program development. To showcase this expertise, we have provided several case studies that emphasize the PolySource advantage. We’re not just your average plastic resin distribution company; we are your partner in delivering technical solutions that benefit your business.

Lawn and Garden OEM

Before PolySource

When a customer’s nylon bushings began to fail, they turned to The Fixers at PolySource for help. An OEM used PA66 to manufacture bushings for lawn and garden vehicle suspension components but noticed after only six months the product would become soft due to moisture absorption and crack under continued pressure. This led to returns, claims, and warranty issues, resulting in added costs. They needed a solution!


  • Any new resin families under consideration needed to meet all the other important application requirements.

Application Requirements

  • Low moisture absorption
  • Good dimensional stability
  • Stiffness
  • Creep resistance
  • Good wear and coefficient of friction performance

PolySource Solution


  • PolySource recommended polyketone (POK) compound, INTEGRA™ POK-900 GA6 LX4.

Advantages of New Material

  • Low moisture absorption
    • No softening
  • Maintained dimensions.
  • No cracking
  • Met all other required application requirements.
    • Stiffness
    • Creep
    • Toughness
  • Offered additional wear and COF performance.

Benefits/Bottom Line

  • Significantly increased longevity of the parts in the field.
  • Polyketone (POK) compound, INTEGRA™ POK-900 GA6 LX4, dramatically changed the performance of these components and achieved significant cost savings for the OEM.