METHOD OF APERTURING THIN SHEET MATERIALS

摘要

A method of forming apertures generally greater than about 0.05 square millimeters in a thin sheet material (14). The thin sheet material includes a first side and a second side, at least one side of the thin sheet material is substantially coated with an adhesive (116). The method comprises the steps of (a) placing the adhesive-coated thin sheet material on a patterned anvil (32) having a pattern of raised areas wherein the height of the raised areas is equal to or less than the thickness of the thin sheet material and the adhesive; and (b) subjecting the thin sheet material to a sufficient amount of sonic vibrations to aperture the thin sheet material and the adhesive; and whereby the thin sheet material and the adhesive is apertured in a pattern generally the same as the pattern of raised areas on the patterned anvil (32).