METHOD FOR PROVIDING MICRO-ABERRATIONS ON A FILM

摘要

Systems ans methods for forming a vacuum formed, apertured film (50) with micro-aberrations (52) may be disclosed. For example, a polymer web such as a molten polymer web (10) may be received at an engagement point (40) between a screen (22) with a positive aberration and a roller (32) comprising a surface with a negative depression. The roller (32) may have a diameter of no more than about 5.5 inches. A micro-aberration (52) may be expanded, for example, on a land of the polymer web at the engagement point (40) by inserting the positive aberration on the screen (20) into the negative depression on the surface of the roller (32) at a pressure of about 1.5 to about 3.5 pounds per linear inch (PLI). Additionally, one or more apertures are formed in the polymer web (10) adjacent to a micro-aberration (52) on a land.