Polymeric film having structured surface

US11907447B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Brett J. Sitter · Windom, US
• Dawn V. Muyres · Windom, US
• Jonathan T. Kahl · Woodbury, US
• Vivian W. Jones · Woodbury, US
• Owen M. Anderson · Minneapolis, US
• Gordan A. Kuhnley · Okabena, US
• Joshua J. Loga · River Falls, US
• Erin A. McDowell · Afton, US

Key dates

• Filing date: Dec 6, 2019
• Grant date: Feb 20, 2024
• Expiry date: May 20, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2457/20
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A polymeric film including a major surface having a plurality of intersecting extended structures is described. For at least a majority of the structures in the plurality of extended structures: each structure extends along a length of the structure, has an average width along a direction transverse to the length and generally along the first major surface, and has an average height along a direction generally perpendicular to the first major surface; and the average width of the structure may be in a range of 1 to 200 micrometers, the average height of the structure may be in a range of 1 to 200 micrometers, and the length may be at least 3 times the average width. The extended structures may be randomly or pseudorandomly oriented and may be formed by microreplicating a surface of a paper.