Patent ID: 11780211

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.