| 摘要 |
This invention relates to a method of making a foamable foil of at least one thermoplastic resin with at least one liquid blowing agent incorporated therein, said method comprising forming the thermoplastic resin into a layer between two foils, said resin comprising an excess of blowing agent, to form an assembly comprising at least an intermediate layer of resin with blowing agent and two other layers, whereafter the blowing agent partly diffuses from the intermediate layer. <IMAGE> |
