Development of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam processDevelopment of the theoretical basis for the reduction of the energy consumption at the bead foam process