UV Barrier Film
First Claim
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1. 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, andwherein said second additive is present in the film in an amount less than 2.0% by weight.
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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.
64 Citations
17 Claims
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1. A polypropylene film comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A polypropylene film comprising:
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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.
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Specification