Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same

摘要

Methods of increasing the perceived thickness and strength of a thermoplastic film include incrementally stretching thermoplastic films in the machine direction. In one or more implementations, methods of incrementally stretching thermoplastic films include reducing the gauge of the films while increasing a loft of at least a portion of the film. The methods can involve cold stretching the films and imparting rib patterns and alternating peaks and valleys into the film. The linear ribs can have alternating thick and thin gauges.

主权项

1. A machine-direction incrementally-stretched film with increased loft formed by stretching an un-stretched thermoplastic film, comprising:
a thermoplastic material incrementally stretched in a machine direction to define a ribbed pattern; the ribbed pattern comprising:
a plurality of thick linear ribs extending in the transverse direction across the machine-direction incrementally-stretched film, the transverse direction being perpendicular to the machine direction, anda plurality of thin stretched linear ribs extending in the transverse direction across the machine-direction incrementally-stretched film; anda plurality of undulations extending across the machine-direction incrementally-stretched film generally in the transverse direction, wherein the plurality of undulations are positioned only within the thin stretched linear ribs.