This site uses cookies to store information on your computer. Learn more x


Properties for injection molding grades

From outstanding thermal and mechanical properties to good resistance to a wide range of chemicals, Akulon® is ideal for a broad range of injection and blow molding applications…

Akulon is ideal for injection molding thanks to its unique combination of temperature considerations, mechanical performance, thermal qualities and chemical resistance.

Polyamides are renowned for their resistance to a wide range of chemicals. Our Akulon and Akulon Ultraflow polyamides deliver excellent resistance to different types of oils and grease and are ideally suited to under-the-hood applications like engine covers - as well as gears and bearings for industrial applications.

Akulon, like other polyamides, is attacked by strong mineral acids and is susceptible to hydrolysis around water and glycols at elevated temperatures unless stabilized. So how do you choose an Akulon grade with respect to chemical properties?

  •  Versus polyester (PBT): Better hydrolysis resistance and resistance against alkaline solvents
  •  Versus poylcarbonate (PC): Better environmental stress crack resistance
  •  Polyamide 6 has better heat aging and oil resistance than polyamide 66
  •  Polyamide 66 has better hydrolysis resistance for grades with similar glass fiber content to polyamide 6.

Akulon performs over a wide temperature range. Unfilled and reinforced materials can be used for demanding engineering applications from as low as -40°C (-40°F) to just below the melting point of the polymer: 220°C (428°F) in the case of polyamide 6 and 260°C (500°F) for polyamide 66. 

Infographic: Akulon Stiffness versus temperature (full size)

The high crystallinity and melting point of Akulon enables these materials to retain stiffness at elevated temperatures. For critical applications, this means better safety margins, and thinner walls compared to other materials. 

When it comes to measuring properties after aging, we recommend this is best performed under real conditions in the application itself. So for automotive applications where peak temperatures remain under 180°C (356°F), polyamide 6 provides better heat aging resistance and improved security and durability compared to polyamide 66.