| 摘要 |
<p>Process for manufacture of cellular porous thermoplastic articles The mixture to be fashioned contains a solid, finely divided, inorganic nucleating agent, comprising a hydrated double ammonium carbonate such as Mg(NH4)2(CO3)2. 4H2O, which decomposes with gas evolution on heating; only a trace of gas remains int he plastic material so that its colour is not effected.</p> |
