Flavor barrier
View Patent ↗A heat sealable barrier layer for food and beverage cartons is provided, the barrier layer including an additive material which reduces the amount of essential oil scalping from citrus products. Additionally, a carton coating layer and process is provided for reducing a coefficient of friction of stacked carton blanks. An additional embodiment of the invention provides for a paperboard substrate having reduced water vapor transmission rates, the reduction in water vapor transmission rates being attributed to one or multiple extruded layers containing an effective amount of an inorganic additive.
1. A barrier laminate comprising:
a paperboard substrate having a first surface and a second surface, the second surface being opposite the first surface, said second surface being adjacent a plurality of extruded polymer layers;
a first layer selected from one of said plurality of extruded polymer layers and further comprising a heat sealable layer of a polyolefin and containing between about 20% to about 35% of an essential oil scalping reducer comprising an inorganic additive;
a second layer selected from one of said plurality of extruded polymer layers and comprising a first water vapor barrier layer and having an effective amount of a water vapor transmission rate reducing inorganic additive; and,
a third layer selected from one of said plurality of extruded polymer layers, and comprising a second water vapor barrier layer comprising an effective water vapor transmission rate reducing amount of an inorganic additive.
2. The barrier laminate according to claim 1 wherein a fourth layer selected from one of said plurality of extruded polymer layers further comprises a third water vapor barrier layer comprising an effective water vapor transmission rate reducing amount of an inorganic additive.
3. The barrier laminate according to claim 1 wherein at least one of said first water vapor barrier layers and said second water vapor barrier layers is an adhesive tie layer.
4. The barrier laminate according to claim 1 wherein said inorganic additive is calcium carbonate.
5. The barrier laminate according to claim 2 wherein said inorganic additive is calcium carbonate.
6. The barrier laminate according to claim 3 wherein said inorganic additive is calcium carbonate.
7. A carton filled with a juice beverage constructed according to a barrier laminate comprising:
a paperboard substrate having a first surface and a second surface, the second surface being opposite the first surface;
a first barrier layer extrusion coated as an outermost layer along said first surface, said barrier layer further comprising between about 20% to about 35% by weight of an essential oil anti-scalping additive;
a second barrier layer comprising an extruded polymer layer having an effective amount of a water vapor transmission rate reducing inorganic additive, said first water vapor barrier layer positioned between said paperboard substrate and said first barrier layer; and,
a third barrier layer positioned between said paperboard substrate and said second barrier layer, said third barrier layer comprising an effective water vapor transmission rate reducing amount of an inorganic additive.
8. The carton according to claim 7 wherein said essential oil anti-scalping additive is calcium carbonate.
9. The carton according to claim 7 wherein said inorganic additive in at least one of said second and said third barrier layers is calcium carbonate.