the invention relates to chemically bonded laminated structures and their production from oriented polymeric laminae . the bonds between the contacting lamina are formed by chemical reaction across their interface involving constituent molecular chains of each laminae . three methods have been found for producing the bonds : bringing the surfaces of the lamina in intimate contact to within 10 ° c . and 100 ° c . below the melting temperature of the surfaces ; interposing a coupling agent for the polymer molecules of the intimately contacting surfaces of each member into their interface and heating the laminate to a temperature effective to cause reaction of the coupling agent with the molecules of each ; and interposing a catalyst to promote chemical reaction of the molecules of each laminae with the molecules of intimately contacting lamina into their interface and heating to a temperature effective to cause reaction . structures bonded may be from film sheets , strips or bands or they may be other configurations that have suitable surfaces for that intimate contact required .