Colored thermoplastic intermediate layer with wedge-shaped cross-section

US11780211B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Stephan GIER · Bous, DE
• Andrea Willms · Aachen, DE

Key dates

• Filing date: Mar 25, 2021
• Grant date: Oct 10, 2023
• Expiry date: Mar 25, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/01
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A colored thermoplastic intermediate layer with a width, a height, and a wedge-shaped cross-section with a thicker first end and a thinner second end, at least comprising a first colored thermoplastic layer with a width, a height, and a wedge-shaped cross-section with a thicker first end and a thinner second end, wherein the width and the height of the colored thermoplastic intermediate layer equal the width and the height of the first colored thermoplastic layer, the first colored thermoplastic layer has a dye, the dye concentration in the first colored thermoplastic layer increases from its thicker first end to its thinner second end, the light transmittance through the first colored thermoplastic layer is constant over its entire width and its entire height, and the light transmittance through the colored thermoplastic intermediate layer is constant over its entire width and its entire height.