Method and apparatus for producing perforated film

Details Method and apparatus for producing perforated film Method and apparatus for producing perforated film

B - Operations, Transporting

26

F

18/1002, 18/1057

B26F 1/00 (2006.01) A61F 13/15 (2006.01) B26F 1/26 (2006.01) B29C 51/22 (2006.01) B29C 51/10 (2006.01)

Patent

CA 1125973

Case V-4438 ABSTRACT METHOD AND APPARATUS FOR PRODUCING PERFORATED FILM An improved process and apparatus for generating a thermoplastic film of a type suitable for use in disposable garments such as diapers. The method comprises disposing an impervious film of thermoplastic material at an elevated temperature on a rotating molding-perforating surface element, which has regularly arranged, generally contiguous hexagonal depressions terminating in elliptical holes, applying a fluid pressure to the film to cause flow into the depressions and rupture at said elliptical holes. The elliptical holes are oriented with the major axes in the direction of movement of the rotating surface.

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