Protective display film

US9780318B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Michael A. Johnson · Stillwater, US
• David Scott Thompson · Lake Elmo, US
• Catherine A. Leatherdale · Woodbury, US
• John J. Stradinger · Roseville, US
• Evan L. Breedlove · Lafayette, US
• Steven D. Solomonson · Shoreview, US
• Ryan M. Braun · Windom, US
• Kevin R. Schaffer · Woodbury, US
• Peihui Zhang · Woodbury, US
• Joseph D. Rule · Woodbury, US

Key dates

• Filing date: Dec 15, 2015
• Grant date: Oct 3, 2017
• Expiry date: Dec 15, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A display film includes a transparent polymeric substrate layer and a transparent aliphatic cross-linked polyurethane layer disposed on the transparent polymeric substrate layer. The transparent aliphatic cross-linked polyurethane layer has a glass transition temperature in a range from 11 to 27 degrees Celsius and a Tan Delta peak value in a range from 0.5 to 2.5. The display film has a haze value of 1% or less.