METHOD FOR MAKING APERTURED WEB

摘要

PROBLEM TO BE SOLVED: To provide a process for producing apertures in a film or filmy nonwoven laminate that can overcome the effect of molecular orientation of film and produce apertures resembling oval holes rather than slits.SOLUTION: There is provided a method for making apertures in a precursor web using a forming apparatus 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 corrected 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.SELECTED DRAWING: Figure 1