Microporous films, and articles made therefrom

US10793688B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Wenyi Huang · Midland, US
• Yijian Lin · Manvel, US
• Selim Bensason · Horgen, CH
• Jacquelyn A. Deg root · Sugar Land, US
• Joseph L. Deavenport · Lake Jackson, US

Key dates

• Filing date: May 30, 2017
• Grant date: Oct 6, 2020
• Expiry date: Sep 25, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/16
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A microporous film comprising: 75 wt. % or greater of a high density polyethylene resin having a density of 0.957 g/cc-0.970 g/cc, a melt index of from 0.2 to 10 g/10 minutes, a molecular weight distribution, Mw,cc/Mn,cc, of greater than or equal to 6.0, and a Mz,abs of greater than or equal to 500,000 g/mol, wherein the microporous film is oriented in the machine direction and exhibits a normalized water vapor transmission rate greater than 50 g mil/(100 in2·day).