| 摘要 |
An absorbent master batch chip composition for a polystyrene foam tray of the present invention comprises: with respect to 100 parts by weight of basic polystyrene resin, 1-80 parts by weight of an organic anionic sulphonate; 1-75 parts by weight of calcium carbonate (CaCO3); and 1-50 parts by weight of talc. The organic anionic sulphonate is secondary n-alkane sulphonates. The calcium carbonate has the role of a compatibilising agent for the uniform absorption and mixing of the organic anionic sulphonate, and the talc has the role of a nucleating agent which ensures that cells are small and uniformly distributed during foaming. Master batch chips are produced by mixing the ingredients of the master batch chip composition in a super mixer such that the organic anionic sulphonate is uniformly distributed in the basic resin, extruding from an extruder and then cutting into pellets. |
