Plastic film having a uv-curing adhesive layer, for the protection of a hologram in a photopolymer film composite

A sealed holographic medium comprising a layer construction B′-C′-D, wherein

• B′ is a photopolymer layer containing a hologram, obtained from an unirradiated photopolymer B comprising
• I) matrix polymers,
• II) writing monomers,
• III) photoinitiators,
• IV) optionally at least one non-photopolymerizable component,
• V) optionally catalysts, free-radical stabilizers, solvents, additives and other assistant and/or added substances,
• wherein the photopolymer layer B′ is at least partly joined to the layer C′,
• C′ is an at least partly actinic-radiation-cured areal layer obtainable from a curable layer C comprising
• I) at least one multifunctional acrylate,
• II) at least one photoinitiator and
• III) optionally assistant and added substances and
• D is an areal substrate layer at least partly joined to layer C′,
• wherein all multifunctional acrylates of the curable layer C are identical to at least one writing monomer of the unirradiated photopolymer layer B.

A kit of parts containing at least one areal photopolymer B′ containing a hologram, and a sealing layer comprising a curable layer C and an areal substrate layer D at least partly joined to the curable layer C, wherein the curable layer C comprises

• I) at least one multifunctional acrylate,
• II) at least one photoinitiator and
• III) optionally assistant and added substances,
• wherein the photopolymer layer B′ containing a hologram is obtainable from an unirradiated photopolymer B comprising
• I) matrix polymers,
• II) writing monomers,
• III) photoinitiators,
• IV) optionally at least one non-photopolymerizable component,
• V) optionally catalysts, free-radical stabilizers, solvents, additives and other assistant and/or added substances, and
• wherein all multifunctional acrylates of the curable layer C are identical to at least one writing monomer of the unirradiated photopolymer layer B.