Striped film and apparatus and method

Details Striped film and apparatus and method Striped film and apparatus and method

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B29C 47/04 (2006.01) B29C 47/06 (2006.01) B32B 3/22 (2006.01) B32B 27/20 (2006.01) B65D 65/38 (2006.01)

Patent

CA 2050026

Striped films of the invention can have two or more preferably polymeric layers, of which at least one continuous or discontinuous layer includes a pigmented resin. The striped film is produced by modifying conventional coextrusion dies to restrict the flow of a pigmented melt stream. The result is a striped film useful for identifying the contents of a package made from the film, tamper evidence, counterfeit protection and verification of properties. The stripes can be of one or more colors, and vary in width and spacing. The pigment can be a material visible in ordinary light, or a material invisible in ordinary light but visible in e.g. ultraviolet light.

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