MICRO-PERFORATED LAMINAE AND METHOD

摘要

A micro-perforated laminae includes a layer of material having a plurality of spaced-apart perforations, in which the total open orifice area of the perforations is about 0.1 % to 17.0% of the total surface area of the layer of material. The layer of material can be a thermoplastic material, metal foil, cellulosic film, paper and/or nonwoven. The perforations can be slits, with each slit having a length of no more than about 100 mils (2.54 mm). Alternatively, the perforations can be holes, in which each hole has a diameter of no more than about five mils (0.13 mm). The total open orifice area of perforations can be in the range of about 0.1 mm2 to about 17 mm2 per square centimeter of the total surface area of the micro-perforated laminae.