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US 11,390,438 B2Granted
High barrier coated paperboard
AssigneeEvergreen Packaging Inc.
InventorGeofrrey Nobes
Life of this patent
Estimating the term…
Abstract
Paperboard structures having extruded barrier layers are provided. Using layer multiplication extrusion it has been found that nylon barrier layer properties can be improved. The further inclusion of metallocene PE in the layers being layer multiplied through extrusion coating provide additional improvements in barrier properties for the paperboard substrate.
Claims12
A paperboard substrate for food packaging comprising:
- a paperboard having an outer surface and an inner surface, the outer surface defining a food contact surface;
- a multi-layer extrusion applied directly to the outer board surface and in the order of Nylon/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/mPE Blend;
- a tie layer applied to the blend layer;
- an EVOH layer applied to the tie layer;
- a tie layer applied to the EVOH layer;
- and
- a LDPE layer applied to the tie layer.
4 more elements
A paperboard substrate for food packaging comprising:
- a paperboard having an outer surface and an inner surface, the outer surface defining a food contact surface;
- a multi-layer extrusion applied directly to the board surface and having the structure of Nylon/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/mPE Blend;
- and
- additional extruded layers applied in order to the multi-layer extrusion of an LDPE layer/Tie layer/EVOH layer/Tie layer/LDPE.
1 more element
A paperboard substrate for food packaging comprising:
- a paperboard having an outer surface and an inner surface, the outer surface defining a food contact surface;
- a multi-layer extrusion applied directly to the board surface and having the structure of:
- Nylon/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/Nylon/Tie/mPE Blend/mPE Blend;
- and
- an additional extruded layer of LDPE applied to the multilayer extrusion.
2 more elements
Dependencies are inferred from the claim text.