<p>Polymeric Sheet A composite sheet having a thickness in the range from 30 to 400 .mu.m, has an opaque crystalline polyester first layer having a deformation index of greater than or equal to 2.5%, and a transparent crystalline polyester second layer. The first layer preferably contains titanium dioxide. The composite sheet is suitable for use as a replacement for aluminium foil, being particularly useful as a lid for a container.</p>
申请公布号
CA2111919(A1)
申请公布日期
1994.06.30
申请号
CA19932111919
申请日期
1993.12.20
申请人
SANKEY, STEPHEN W.;DAWES, MARK E.;LAWRENCE, PAUL D.
发明人
SANKEY, STEPHEN W.;DAWES, MARK E.;LAWRENCE, PAUL D.