A high-strength laminate comprising generally weakly adhered biaxially oriented films, each formed of a blend which exhibits a distinct fibrous morphology with the fibres forming a distinct unidirectional grain when measured on a macro-scale but with the fibre-portions strongly deflected from this direction...http://www.google.com.au/patents/US4908253?utm_source=gb-gplus-sharePatent US4908253 - High strength laminate with barrier layer
