Patent ID: 7900656

Claim:
A pipe having a longitudinal axis and a wall formed from a cross-laminated film, the cross-laminated film comprising: a first layer of a film having a first orientation direction defined by an orientation of molecular chains in the first layer of film, the first orientation direction extending at a non-zero angle α relative to a projection of the longitudinal axis of the pipe onto the pipe wall; a second layer of a film having a second orientation direction defined by an orientation of molecular chains in the second layer of film, the second orientation direction extending at a non-zero angle −α relative to the projection of the longitudinal axis of the pipe onto the pipe wall; wherein: the first and second layers are arranged relative to one another such that a crossover angle of 2α is formed between the first orientation direction and the second orientation direction; and the first and second orientation directions are selected to enhance the resistance of the pipe to longitudinal strain resulting from internal fluid pressure.