Heat-resistant laser-inscribable film

1. A laser-inscribable film, comprising

a contrast layer based on a cured acrylate coating composition and

an engraving layer arranged above the contrast layer, wherein the engraving layer is selected from the group consisting of an acrylate-based printed coating and a thin metal layer, and wherein the engraving layer has a thickness of from 1 to 30 μm,

 wherein the cured acrylate coating composition is based on a composition comprising

from 30 to 80% by weight of a trifunctional oligomer A, wherein the trifunctional oligomer A is one selected from the group consisting of polyurethane tri(meth)acrylates and polyester tri(meth)acrylates and has a number-average molar mass Mn in a range from 1000 to 5000 g/mol;

from 0 to 20% by weight of a trifunctional monomer B, wherein the trifunctional monomer B has a Mn in a range from 300 to 1000 g/mol and is one selected from the group consisting of propoxylated and ethoxylated glycerol tri(meth)acrylates of general Formula I and mixtures thereof

wherein R in the general Formula I is hydrogen or methyl; A is hydrogen or an ethyl group; X, Y and Z are respectively mutually independently a propylene unit or ethylene unit; and a, b and c are respectively mutually independently an integer from 1 to 4, and a+b+c is a number from 3 to 12, wherein;

from 1 to 30% by weight of a difunctional monomer C;

wherein the difunctional monomer C has a Mn in a range from 180 to 350 g/mol and is one selected from the group of consisting of ethylene glycol diacrylates of general Formula II

propylene glycol diacrylates of general Formula III

mixtures thereof,

wherein n in the general formulae (II) and (III) is respectively mutually independently an integer from 1 to 15, and

from 2 to 40% by weight of a colorant pigment.

2. The laser-inscribable film according to claim 1 , wherein the composition, on which the acrylate coating composition is based, comprises from 50 to 60% by weight of the trifunctional oligomer A, from 5 to 15% by weight of the trifunctional monomer B, and from 5 to 15% by weight of the difunctional monomer C.

3. The laser-inscribable film according to claim 1 , further comprising

an adhesive-mass layer arranged below the contrast layer.

4. The laser-inscribable film according to claim 1 , wherein the film is in a form of a label.

5. The laser-inscribable film according to claim 1 , wherein the engraving layer consists of the thin metal layer.