Breathable and microporous thin thermoplastic film

USRE48555E1 · kind E1 · reissue

Assignee

• BERRY FILM PRODUCTS COMPANY, INC. · US

Inventors

• Leopoldo V. Cancio · Vero Beach, US
• Frank Eschenbacher · Schnelldorf, DE
• Jerry Ford · Maineville, US

Key dates

• Filing date: Sep 11, 2017
• Grant date: May 18, 2021
• Expiry date: Sep 11, 2037

Classification

• Technology area (CPC —): General

Abstract

Breathable, thermoplastic films, laminates, and methods of making films having a basis weight less than or equal to 15 gsm and a water vapor transmission rate of at least about 500 grams H2O/24-hour/m2, wherein the film has a ratio of the MD load at break to the CD load at break of less than about 10, and at least one of a machine-direction notched Elmendorf tear strength of at least about 5 g or a machine-direction notched trapezoidal tear strength of at least about 15 g.