| 摘要 |
<p>A method of manufacturing a low air-permeability flexible polyurethane foam block through an employment of at least polyol, an isocyanate compound, a catalyst, a foaming agent and a foam stabilizer, the method being featured in that an open-cell flexible polyurethane foam block having an air-permeability of not more than 5cc/cm<2>/sec is enabled to be formed without accompanying an opening of the cells step called healthy bubble and without substantial variation of air-permeability.</p> |
