Patent ID: 8865289

Claim:
A machine-direction incrementally-stretched film of thermoplastic material comprising: a set of linear ribs extending across the film in a direction transverse to a direction in which the film was extruded, the linear ribs each having a first average thickness; and a set of stretched linear sections extending across the film in the transverse direction, the stretched linear sections each being positioned between adjacent linear ribs, the stretched linear sections each having a second average thickness that is smaller than the first average thickness; wherein the film has: a gauge-by-weight that is from 10.0% smaller than to 5.9% larger than a gauge-by-weight of a film of the thermoplastic material having a substantially uniform thickness equal to the first average thickness; and a machine direction tear resistance that is equal to or greater than a machine direction tear resistance of the film of the thermoplastic material having the substantially uniform thickness equal to the first average thickness.