| 摘要 |
<p>Coloured polyethylene terephthalate moulding compound, a process for the preparation thereof and a container made therefrom. …<??>A polyethylene terephthalate moulding composition is disclosed having uniformly dispersed therein 10-25,000 ppm of caramel as a colourant. The colourant is non-toxic, does not affect the transparency of the polyester, and does not cause aldehyde formation. The caramel may have been formed in situ from a mono- or disaccharide which has been added to the bis(beta-hydroxyethyl)terephthalate before or during polycondensation or to the molten polyester. The colour may have been intensified by additional supply of an alkaline reacting compound. The compostion may moreover contain further colourants. The composition if particularly suitable for use in the manufacture of food containers such a boxes, trays and bottles.</p> |
