Multilayer polymer film

US11254094B2 · kind B2 · utility

Assignee

• DUPONT ELECTRONICS, INC. · US

Inventors

• Kostantinos Kourtakis · Media, US
• Gene M. Rossi · Wilmington, US
• Leopoldo Alejandro Carbajal · Newark, US
• Mark Allan Lamontia · Landenberg, US
• Mobin Yahyazadehfar · West Chester, US
• Ross S. Johnson · Hudsonville, US
• Weiying Gao · Landenberg, US
• Aref Samadidooki · Wilmington, US

Key dates

• Filing date: Oct 26, 2020
• Grant date: Feb 22, 2022
• Expiry date: Oct 26, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2605/003
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

In a first aspect, a multilayer polymer film includes a first polymer layer having a first elastic modulus and a second polymer layer having a second elastic modulus. The first polymer layer includes a polyimide, a polyamide imide, a block copolymer of a polyimide or a polyamide imide or a mixture thereof. The second polymer layer includes a polyimide, a polyamide imide, a block copolymer of a polyimide or a polyamide imide or a mixture thereof. The first elastic modulus is different from the second elastic modulus. The first and second polymer layers are bonded by consolidation. In a second aspect, a cover window for a display includes a hard coat layer and the multilayer polymer film of the first aspect. The first polymer layer of the multilayer polymer film is the layer farthest from the display and is adhered to the hard coat layer.