FLEXIBLE HINGE MATERIAL COMPRISING CROSS-LINKED POLYURETHANE MATERIAL

摘要

An article may include a biodata page defining a perimeter including an edge and a hinge layer attached to at least a portion of the biodata page. The hinge layer comprises a cross-linked polyurethane. In some examples, the hinge layer may include a cross-linked thermoset polyurethane. Security articles, such as security documents and identification documents, are becoming increasingly important.