Protective patch for shrinkable bag
AssigneeW. R. Grace & Co., Cryovac Div.
InventorDaniel J. Ferguson
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Abstract
Disclosed is a protective patch for a biaxially heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer film and comprises a layer of linear low density polyethylene and a layer of ethylene vinyl acetate copolymer. The patch is biaxially heat shrinkable and shrinks with the bag. A method of making the patch is also disclosed.
Claims31
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising:
- (I) an outer layer comprising a linear low density polethylene;
- (II) an inner layer comprising an ethylene-vinyl acetate copolymer;
- (III) said patch being biaxially heat shrinkable, and being adhered to said bag;
- (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising:
- (I) an outer layer comprising a blend of:
- (a) 80% to 100% by weight linear low density polyethylene;
- (b) 20% to 0% by weight ethylene-vinyl acetate having a vinyl acetate content in the range from 7% to 12% by weight and
- (c) 5% to 0% by weight pigments and additives;
- (II) an inner layer comprising an ethylene-vinyl acetate copolymer having 20% to 35% by weight vinyl acetate content;
- (III) said patch being biaxially heat shrinkable, and being adhered to said bag,
- (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
Dependencies are inferred from the claim text.