Tubular multilayer films, method and apparatus for preparing...

Details Tubular multilayer films, method and apparatus for preparing... Tubular multilayer films, method and apparatus for preparing...

B - Operations, Transporting

32

B

B32B 1/08 (2006.01) B29C 47/06 (2006.01) B32B 27/08 (2006.01) C08J 7/04 (2006.01)

Patent

CA 2649061

A tubular, multilayer film comprises a central barrier layer and a pair of adhesive layers on opposite sides of the central barrier layer. The adhesive layers completely cover the central barrier layer. Opposing edges of the central barrier layer overlap longitudinally along the tubular, multilayer film. The total thickness of the central barrier layers in the overlapping portion is substantially the same as the thickness of the central barrier layer in the non-overlapping portion. The tubular, multilayer film also includes inner and outer surface layers. The inner surface layer extends completely around the interior of the tubular, multilayer film, and the outer surface layer extends completely around the exterior of the tubular, multilayer film.

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