Weisshaar - Polyamide Moulded Parts

The properties of polyamide moulds must therefore be enhanced with regard to impact strength, firmness and rigidity prior to use.

If dry polyamide is exposed to a controlled moist environment, the polymer structure may retain water molecules due to the high polarity of the groups of carboxylic acid amides. This process is referred to as conditioning, is reversible and is performed based on a state of equilibrium. The polyamide products require specific moisture to achieve satisfactory mechanical properties.

Polyamide products are frequently conditioned to a state of equilibrium, which corresponds to a climate of 23°C and 50% relative humidity. The water absorption is about 3% depending on the type of polyamide or share of amide groups. The process we use, however, extremely accelerates the water absorption and the state of equilibrium is achieved much faster without the unwanted loss in product quality through water stains and discolouration.