Systems and methods for providing micro-aberrations on film

摘要

Systems and methods for forming a vacuum formed, apertured film with micro-aberrations may be disclosed. For example, a polymer web such as a molten polymer web may be received at an engagement point between a screen with a positive aberration and a roller comprising a surface with a negative depression. The roller may have a diameter of no more than about 5.5 inches. A micro-aberration may be expanded, for example, on a land of the polymer web at the engagement point by inserting the positive aberration on the screen into the negative depression on the surface of the roller 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 adjacent to a micro-aberration on a land.

主权项

1. A method for forming a vacuum formed, apertured film with micro-aberrations, the method comprising:
receiving a molten polymer web at an engagement point between a screen with a positive aberration and one or more openings adjacent to the positive aberration and a roller comprising a surface with a negative depression, wherein the roller is positioned at a leading edge of a vacuum slot; expanding a micro-aberration on a land of the molten polymer web at the engagement point by inserting the positive aberration on the screen into the negative depression on the surface of the roller with the molten polymer web therebetween at a pressure no more than about 3.5 pounds per lineal inch (PLI); and forming one or more apertures through the molten polymer web by passing the molten polymer web with the micro-aberration beyond the leading edge of the vacuum slot such that the vacuum slot is configured to pull portions of the polymer web into the one or more openings in the screen via a pressure differential.