Masking film with improved adhesion stability

A masking film for protecting a substrate, the masking film comprising:

• a release layer comprising at least one polyolefin, low density polyethylene, linear low density polyethylene, high density polyethylene, medium density polyethylene, polypropylene, random copolymer polypropylene, polypropylene impact copolymers, metallocene linear low density polyethylene, plastomers, poly(ethylene-co-vinyl acetate), poly(ethylene-co-acrylic acid), poly(ethylene-co-methyl acrylate), cyclic olefin polymers, polyamides, poly (ethylene-co-n-butyl acrylate), and mixtures thereof;
• a core layer comprising at least one polyolefin, low density polyethylene, linear low density polyethylene, high density polyethylene, medium density polyethylene, polypropylene, random copolymer polypropylene, polypropylene impact copolymers, metallocene linear low density polyethylene, plastomers, poly(ethylene-co-vinyl acetate), poly(ethylene-co-acrylic acid), poly(ethylene-co-methyl acrylate), cyclic olefin polymers, polyamides, poly(ethylene-co-n-butyl acrylate), and mixtures thereof;
• and
• an adhesion layer comprising 50% to 100% by weight of at least one hydrogenated styrene block copolymer;
• wherein the core layer is between the release layer and the adhesion layer;
• wherein the release layer has a release layer thickness between about 1 μm and about 20 μm;
• wherein the core layer has a core layer thickness between about 10 μm and about 50 μm;
• wherein the adhesion layer has an adhesion layer thickness between about 1 μm and about 20 μm;
• wherein the adhesion layer comprises an adhesive surface having a surface roughness (Sa) of greater than about 2.0 μm;
• and
• wherein an Adhesion Build Value of the masking film is less than about 2.0 after the adhesion layer has been attached to a textured polycarbonate substrate and heated to 85° C. for 30 minutes and a peel force is less than about 50 grams/inch (19.69 g/cm).