Breathable container seal
AssigneeH.J. Heinz Company
InventorFazal Imam Farooqui
Life of this patent
Estimating the term…
Abstract
A multi-layer seal material comprising a layer of paper or pulp, next to a layer of polymer, next to a layer of metal foil, next to a layer of adhesive polymer, the seal containing micro-holes allowing the seal to be breathable. A method of making a sealed container is also described by forming the multi-layer seal material described above, using laser drilling to generate the micro-holes in the seal material, placing the adhesive polymer layer of the multi-layer seal material onto a container filled with product material, heating the seal material to bond the seal to the container, thereby forming a product filled container having a breathable seal.
Claims21
1-30. (canceled)
A breathable multi-layer container seal material comprising:
- a layer of paper or pulp;
- a layer of metal foil;
- a polymer bonding layer bonding the layer of paper or pulp to the layer of metal foil;
- a layer of adhesive polymer coupled to the layer of metal foil;
- a plurality of micro-holes extending between opposite sides of the breathable multi-layer container seal material;
- and
- a thickness of between about 0.8 mm and about 1.6 mm.
A breathable multi-layer container seal material comprising:
- a layer of paper or pulp;
- a layer of metal foil having a thickness of between about 10 and about 25 microns;
- a polymer bonding layer bonding the layer of paper or pulp to the layer of metal foil;
- said polymer bonding layer having a thickness of between about 15 and about 20 microns;
- a layer of adhesive polymer coupled to the layer of metal foil and being structured and arranged to bond the breathable multi-layer container seal material to a container;
- a plurality of laser drilled micro-holes extending between opposite sides of the breathable multi-layer container seal.
A breathable four layer container seal material comprising:
- a layer of paper or pulp;
- a layer of metal foil;
- a polymer bonding layer bonding the layer of paper or pulp to the layer of metal foil;
- and
- a layer of adhesive polymer coupled to the layer of metal foil and being structured and arranged to bond the breathable four layer container seal material to a container;
- and
- a plurality of micro-holes extending through the breathable four layer multi-layer container seal.
Dependencies are inferred from the claim text.