| 摘要 |
<p>Expanded cellular or foamed thermoplastic cups and containers commonly are readily statically charged and this causes problems, particularly in drink dispensing means. <??>Articles of such material can be made substantially static free by use of a selected surface active agent or emulsifier which may be applied to the surface of the article or to the beads of thermoplastic material from which the article is made. <??>In a process of combining anti-static agent and thermoplastic material, an anti-static agent, which may be liquid or solid, is misted, atomised or vapourised for coating beads of a thermoplastic material, the beads at the coating stage being unexpanded or pre-expanded. </p> |
