Polyketone has an inherently low moisture absorption. Tests according to ISO 1110 show that all tested AKROTEK® PK compounds reach their equilibrium moisture after just 2 to 3 days, compared with polyamide 6.6 compounds, which require over 20 days.Moisture absorption vs. Exposure time 500 h at 70 °C and 62 % rel. humidity following ISO 1110.