| 摘要 |
PURPOSE:To provide resin foam, which has an infinite number of fine bubbles and mechanical strength comparable to the mechanical strength of unformed material, and its manufacturing method. CONSTITUTION:After blowing agent is infiltrated in a resin formed body having resin region, in which the permeability of the gas blowing agent is low, and resin region, in which the permeability of the gas blowing agent is high, and, after that, the body is expanded by heating so as to produce resin foam having non-foamed region and foamed region, the ration Vuf/Vf of 0.1 or more, in which Vuf is the volume of the non-foamed region and Vf is the volume of the whole foam, and the average bubble diameter of 50mum or less. |
