Multilayer structures, packages, and methods of making multilayer structures
OwnerRobert J. Blemberg, Chad D. Mueller +3inventors
InventorsRobert J. Blemberg, Chad D. Mueller, Michael J. Douglas, Duane H. Buelow, Roberto P. Castellani
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Abstract
Multilayer structures, methods of making the same and packages made therefrom are provided. The multilayer structures are useful for packaging bone-in meat or other like products. More specifically, the multilayer structures have sufficient rigidity and strength to contain bone-in meat or other like products. In addition, multilayer structures can easily seal to themselves or to other structures. Moreover, the multilayer structures are biaxially oriented and heat-shrinkable.
Claims40
A multilayer structure for packaging bone-in meat comprising:
- an outer layer comprising a blend of linear low density polyethylene and low density polyethylene;
- a first polyamide layer comprising a blend of between about 70% by weight and about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide;
- a first tie layer disposed between said outer layer and said first polyamide layer;
- a second tie layer disposed adjacent said first polyamide layer;
- a second polyamide layer disposed adjacent said second tie layer comprising a blend of between about 70% by weight and about 99% by weight semi-crystalline polyamide, and between about 1% by weight and about 30% by weight amorphous polyamide;
- a sealant layer comprising a blend of linear low density polyethylene and low density polyethylene wherein the volume percent of the sealant layer is greater than the volume percent of the outer layer;
- and
- a third tie layer disposed between said sealant layer and said second polyamide layer.
A package for bone-in meat comprising:
- a first wall comprising a multilayer structure comprising an outer layer comprising a blend of linear low density polyethylene and low density polyethylene;
- a first polyamide layer comprising a blend of about 70% by weight to about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide;
- a first tie layer disposed between said outer layer and said first polyamide layer;
- a second tie layer disposed adjacent to said first polyamide layer;
- a second polyamide layer disposed adjacent said second tie layer comprising a blend of about 70% by weight to about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide;
- a sealant layer comprising a blend of linear low density polyethylene and low density polyethylene wherein the volume percent of the sealant layer is greater than the volume percent of the outer layer;
- and a third tie layer disposed between said sealant layer and said second polyamide layer.
A method of making a multilayer for packaging bone-in meat comprising the steps of:
- coextruding a multilayer structure comprising an outer layer comprising a blend of linear low density polyethylene and low density polyethylene;
- a first polyamide layer comprising a blend of between about 70% by weight and about 99% by weight semi-crystalline polyamide and about 1% by weight to about 30% by weight amorphous polyamide;
- a first tie layer disposed between said outer layer and said first polyamide layer;
- a second tie layer disposed adjacent said first polyamide layer;
- a second polyamide layer disposed adjacent said second tie layer comprising a blend of between about 70% by weight and about 99% by weight semi-crystalline polyamide, and between about 1% by weight and about 30% by weight amorphous polyamide;
- a sealant layer comprising a blend of linear low density polyethylene and low density polyethylene wherein the volume percent of the sealant layer is greater than the volume percent of the outer layer;
- and a third tie layer disposed between said sealant layer and said second polyamide layer;
- and
- biaxially orienting said multilayer structure.
Dependencies are inferred from the claim text.