Packaging films
A packaging film is described comprising at least one polymer film layer in which particles of a small-pore or a medium-pore palladium-doped zeolite are dispersed. Such films are of particular utility for the adsorption of volatile organic compounds, such as those originating from organic matter.
1. A packaging film for the adsorption of volatile organic compounds comprising at least one polymer film layer, wherein particles of a small-pore or a medium-pore palladium-doped zeolite are dispersed in the polymer film layer, and wherein the palladium-doped zeolite is in the hydrogen form.
2. The packaging film according to claim 1 wherein the polymer film layer comprises a polymer selected from an ethylene vinyl acetate co-polymer, a low-density polyethylene, a polypropylene, or a high impact polystyrene.
3. The packaging film according to claim 1 wherein the zeolite has a framework type that is chabazite.
4. The packaging film according to claim 1 wherein the polymer film layer comprises 1 to 10 wt % of said palladium-doped zeolite.
5. The packaging film according to claim 1 wherein said palladium-doped zeolite comprises 0.2 to 2 wt % palladium based on the total weight of said palladium-doped zeolite.
6. The packaging film according to claim 1 wherein the polymer film layer has a thickness of 5 to 30 μm.
7. The packaging film according to claim 1 wherein the palladium-doped zeolite particles have a particle size (d50) between 5 and 10 μm.
8. The packaging film according to claim 1 consisting essentially of the polymer film layer.
9. The packaging film according to claim 1 comprising a gas permeable barrier layer.
10. A packaging structure comprising a film according to claim 1 .
11. A method of adsorbing volatile organic compounds originating from organic matter using a packaging film according to claim 1 .
12. The method according to claim 11 wherein the volatile organic compound is ethylene.