Plastic films having high Vicat softening temperature in layered structures

A layer construction comprising

• a) at least one opaque layer a) containing one or more polycarbonates based on diphenols or copolycarbonates based on diphenols, wherein the at least one layer a) has a light transmission of ≥0.1% and ≤85%, determined according to ISO 13468-2:2006-07 and
• b) at least one further transparent layer b) containing at least one thermoplastic, wherein the at least one further layer b) has a light transmission of ≥85% and ≤98%, determined according to ISO 13468-2:2006-07,
• wherein the one or more polycarbonates or copolycarbonates of layer a) have a Vicat softening temperature B/120 determined according to ISO 306:2004 (method B120 50N;
• 120° C./h) of ≥156°° C.,
• wherein the Vicat softening temperature of the one or more polycarbonates or copolycarbonates of layer a) is higher than a Vicat softening temperature of the thermoplastic of layer b),
• wherein the one or more polycarbonates based on diphenols or copolycarbonates based on diphenols in the at least one layer a) comprise at least one carbonate structural unit of formula (I-1), (I-2), (I-3) or (I-4)
• wherein
• R1 and R2 independently of one another represent hydrogen, halogen, C1-C8-alkyl, C5-C6-cycloalkyl, C6-C10-aryl, or C7-C12-aralkyl,
• m is an integer from 4 to 7,
• R3 and R4 individually selectable for each X independently of one another represent hydrogen or C1-C6-alkyl, and
• X represents carbon, with the proviso that for at least one atom X, R3 and R4 both represent alkyl,
• wherein R5 represents a C1- to C4-alkyl radical, aralkyl radical or aryl radical,
• wherein layer a) has at least one opening,
• wherein layer a) has a layer thickness of ≥10 to ≤150 μm, and
• wherein layer a) is not filled with a thermoplastic material.