Straight webs and process of making

Abstract

A multi-layered web is produced by providing a first layer comprised of a strip of biaxially oriented polymeric film characterized by an inherent tendency to bend within its own plane. The strip is tensioned so as to overcome the bending tendency and assume a straight orientation. While the strips is held straight, a second layer of material is adhered to the strip. The second layer counteracts the bending tendency of the first layer so that when the tensioning forces are released, the web is straight. The first and second layers may comprise first and second strips of plastic film, respectively, which are arranged such that the bending tendencies of the strips are oriented opposite one another. The strips are adhered together by an adhesive material, or by being directly fused together. Alternatively, the second layer may comprise a coating applied to the plastic strip. The coating can be applied to one or both sides of the strip.

Dependencies are inferred from the claim text.