Barrier material
AssigneeNippon Paper Industries Co., Ltd.
InventorsTakaharu Noda, Masaaki Fukunaga
Life of this patent
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Abstract
An object is to provide a barrier material which not only is high in degree of biomass and small in amount of CO2 emitted, but also has biodegradability and simultaneously has excellent gas barrier property and water vapor barrier property, and which can be suitably used particularly in packaging applications for foods or the like, such as a packaging material, a bag, a paper container, a cardboard box, and a cup. A solution to be provided is a barrier material having an oxygen permeability of 10 ml/m2·day·atm or less at a temperature of 23° C. and a relative humidity of 0%, and having a total degree of biomass of 50% or more.
Claims18
A barrier material comprising:
- a paper base material which is a laminate constituted by a paper substrate, a water vapor barrier layer, and a gas barrier layer stacked in this order, wherein the gas barrier layer is comprised of a water-soluble polymer and a surfactant;
- and
- a resin layer formed on the paper base material on a side of the gas barrier layer,
- wherein the barrier material has an oxygen permeability of 10 ml/m2·day·atm or less at a temperature of 23° C. and a relative humidity of 0%, and has a total degree of biomass of 50% or more.
Dependencies are inferred from the claim text.