Protective display film with glass

US11577492B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Joseph W. Woody, V · Saint Paul, US
• David Scott Thompson · Lake Elmo, US
• Catherine A. Leatherdale · Woodbury, US
• Ryan M. Braun · Windom, US
• Michael A. Johnson · Stillwater, US
• Steven D. Solomonson · Shoreview, US
• John J. Stradinger · Roseville, US
• Lyudmila A. Pekurovsky · Bloomington, US
• Joseph D. Rule · Woodbury, US
• Peter D. Condo · Lake Elmo, US

Key dates

• Filing date: Sep 21, 2017
• Grant date: Feb 14, 2023
• Expiry date: Sep 21, 2037

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 glass layer having a thickness of 250 micrometers or less, or in a range from 25 to 100 micrometers. A transparent energy dissipation layer is fixed to the transparent glass layer. The transparent energy dissipation layer has a glass transition temperature of 27 degrees Celsius or less, a Tan Delta peak value of 0.5 or greater, or from 1 to 2 and a Young's Modulus (E′) greater than 0.9 MPa over a temperature range of −40 degrees Celsius to 70 degrees Celsius. In a preferred embodiment, the transparent energy dissipation layer comprises a cross-linked polyurethane layer or a cross-linked polyurethane acrylate layer.