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.
Claims17
A polypropylene film comprising:
- at least a first and a second ultraviolet (UV)-absorbing additive for improving film optical properties by reducing haziness;
- wherein said first additive comprises a non-aggregated inorganic material;
- wherein said first additive is present in the film in an amount ranging from 0.1% to 5.0% by weight;
- wherein said a second additive comprises an organic material selected from the group consisting of triazines, hindered amines, oxanilides, cyanoacrylates, benzotriazoles and benzophenones, and
- wherein said second additive is present in the film in an amount less than 2.0% by weight.
A polypropylene film comprising:
- a non-aggregated inorganic additive in an amount ranging from 0.1% to 5.0% of the film by weight;
- and
- an organic additive in an amount less than 2.0% of the film by weight,
- wherein said organic additive comprises a benzotriazole compound and a benzophenone compound in a ratio of benzotriazole compound to benzophenone compound of at least 0.5,
- wherein said inorganic and organic additives improve one or more optical qualities of said film.
Dependencies are inferred from the claim text.