UV Barrier Film
AssigneeInnovia Films Limited
InventorCeline Denecker
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Abstract
Transparent polypropylene film comprising at least two UV-absorbing additives, a first additive being a non-aggregated inorganic material present in the film composition in an amount of from 0.1 to 5.0% by weight, and a second additive comprising an organic material selected from triazines, hindered amines, oxanilides, cyanoacrylates, benzotriazoles and/or benzophenones and present in the film in an amount of less than 2.0% by weight and wherein when both benzotriazole(s) and benzophenone(s) are present in the film, the ratio of benzotriazole(s) to benzophenone(s) is above 0.5.
Claims20
A transparent polypropylene film comprising:
- at least a first and a second ultraviolet (UV)-absorbing additive;
- wherein said first additive comprises a non-aggregated inorganic material present in the film composition in an amount of from 0.1% to 5.0% by weight, and
- wherein said second additive comprises an organic material selected from benzotriazoles;
- wherein benzophenone is absent in the film composition;
- wherein said second additive is present in the film in an amount of less than 2.0% by weight,
- wherein the average particle size of the inorganic additive is less than 100 nm.
A transparent polypropylene film comprising:
- a first ultraviolet (UV)-absorbing additive comprising a non-aggregated inorganic material present in the film in an amount of from 0.1% to 5.0% by weight,
- wherein the average particle size of the inorganic additive is less than 100 nm;
- a second UV-absorbing additive comprising benzotriazoles,
- wherein said second additive is present in the film in an amount of less than 2.0% by weight,
- wherein benzophenone is absent in the film.
Dependencies are inferred from the claim text.