Asymmetric multilayer film for ostomy application
AssigneeHollister Incorporated
InventorsMoh-Ching Oliver Chang, Joel D. Shutt
Life of this patent
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Abstract
An asymmetric multilayer film for an ostomy pouch includes a barrier layer including a first side and a second side. At least one layer is arranged on the first side of the barrier layer, and at least one layer arranged on the second side of the barrier layer, in which the combined thickness of the at least one layer arranged on the first side of the barrier layer is at least two times greater than the combined thickness of the at least one layer arranged on the second side of the barrier layer. The asymmetric multilayer film has a thickness of about 25 μm to about 50 μm.
Claims7
An asymmetric multilayer film for an ostomy pouch consisting essentially of a seal layer/inner layer/tie layer/barrier layer/outer layer construction;
- wherein the seal layer is formed from a blend comprising ethylene vinyl acetate copolymer (EVA) and ethylene-propylene copolymer (EP copolymer), the inner layer is formed from a blend comprising EP copolymer and polypropylene/ethylene-propylene rubber (PP-EP rubber), the tie layer is formed from a maleated ethylene methyl acrylate copolymer (EMA-MAH), the barrier layer is formed from a blend comprising an amorphous polyamide and a functionalized rubber compound, and the outer layer is formed from EMA-MAH;
- and
- wherein a combined thickness of the seal layer, the inner layer, and the tie layer is at least two times greater than a thickness of the outer layer.
Dependencies are inferred from the claim text.