Easy-way production of highly transparent nanocellular polymers films

The key parameters and production route for the easy production of highly transparent nanocellular films based on polymethylmethacrylate (PMMA) with thickness below 1 mm are herein described. The use of the gas dissolution foaming process (CO2 as physical blowing agent) with saturation pressures of 40 and 50 MPa, a saturation temperature of 0 °C and a saturation time of 2.5 h together with an adequate approach to foam the samples leads to the...