Imperial Chemical Industries Limited

Dupont Teijin Films U.S. Limited Partnership

Paul David Lawrence

Gary Victor Rhoades

William James Brennan

Michael Richard Berry

Mark Edward Dawes

Stephen William Sankey

A multilayer card has (i) an opaque polyester film substrate containing 0.2 to 30% by weight, relative to the total weight of the substrate, of at least one copolyesterether, (ii) a first ink-receptive layer on at least one surface of the substrate, (iii) a cover layer on the surface of the ink-receptive layer and/or surface of the substrate and (iv) a second ink-receptive heat-sealable layer comprising a polyester resin on a second surface of the substrate. The presence of the copolyesterether in the substrate reduces the tendency of the card to delaminate in use. Suitable for use, inter alia, in identification, magnetic, credit, pre-paid and smart cards.

Multilayer card

A multilayer card has (i) an opaque polyester film substrate () containing 0.2 to 30% by weight, relative to the total weight of the substrate, of at least one copolyesterether, (ii) an ink-receptive layer () on at least one surface of the substrate, and (iii) a cover layer () on the surface of the ink-receptive layer and/or surface of the substrate. The presence of the copolyesterether in the substrate reduces the tendency of the card to delaminate in use. Suitable for use, inter alia, in identification, magnetic, credit, pre-paid and smart cards.

Polymeric film

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.

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Middlesbrough, United Kingdom

Paul David Lawrence