Method for making an apertured web

Details Method for making an apertured web Method for making an apertured web

B - Operations, Transporting

26

F

B26F 1/20 (2006.01)

Patent

CA 2749951

A method for making apertures in a precursor web using a forming apparatus is provided where the web comprises a film having molecular orientation and the forming apparatus comprises an arrangement of teeth. The orientation of the arrangement of teeth and the molecular orientation of the film are predetermined and modified to provide a relative angle between the orientation of the teeth and the molecular orientation of the film. Apertures formed in the precursor web material have a length and width exhibiting a minimal aspect ratio.

L'invention porte sur un procédé de fabrication d'ouvertures dans une toile de précurseur à l'aide d'un appareil de formation, la toile comprenant un film ayant une orientation moléculaire et l'appareil de formation comprenant un agencement de dents. L'orientation de l'agencement de dents et l'orientation moléculaire du film sont prédéterminés et modifiés pour fournir un angle relatif entre l'orientation des dents et l'orientation moléculaire du film. Les ouvertures ménagées dans le matériau de toile de précurseur ont une longueur et une largeur présentant un rapport d'aspect minimal.

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