Imperial Chemical Industries Limited

Michael Richard Berry

David Wall

Gary Victor Rhoades

Paul David Lawrence

Richard A Marbrow

Polymeric film

A method of producing a composite film by forming a substrate layer of polymeric material having an at least one surface a heat-sealable layer and applying a particulate additive to the exposed surface of the heat-sealable layer with the particulate additive bonding to and/or penetrating into the heat-sealable layer. The exposed surface of the heat-sealable layer has greater than 100 surface protrusions per mm2 produced by the particulate additive. The surface protrusions have an average peak height in the range from 5 to 400 nm measured from the average level of the surface of the heat-sealable layer.

Method of coating polymeric substrates with particulate materials

A multilayer film comprises a substrate layer of polymeric material having on a first surface thereof a polyester heat-sealable layer, and on a second surface thereof a thermoset acrylic resin backing layer. The backing layer is preferably a discontinuous coating. The heat-sealable layer is optionally coated with a release layer, preferably a polyurethane resin release layer.

Growing community of inventors

Cleveland, United Kingdom

Michael Richard Berry