Integral film tear strip

Details Integral film tear strip Integral film tear strip

B - Operations, Transporting

29

C

18/784

B29C 47/06 (2006.01) B29C 47/00 (2006.01) B29C 47/20 (2006.01) B29C 47/30 (2006.01) B29C 47/70 (2006.01) B29C 59/00 (2006.01) B65D 75/58 (2006.01)

Patent

CA 1227008

Abstract Disclosed is plastics film containing a tear strip and a method for producing it in which the film is co-extruded with a bead which adheres to the film surface. Because of the heat retained by the bead, blown expansion of the film following ex- trusion causes the film to undergo a gauge reduction along and adjacent to the bead which provides a preferential tear line for the film.

444595

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