Peelable absorbent food package
The present invention provides a peelable microwavable food package capable of absorbing undesired liquids released from packaged food products during storage, display, or heating, including microwave cooking. The present invention provides a peelably sealed microwavable food package in any packaging format including pouches, flow-wrap, horizontal form fill seal (HFFS), vertical form fill seal (VFFS), gas-flushed, vacuum-packaged, sealed rigid plastic containers and the like.
1. A peelable microwavable food package capable of absorbing liquids released from a packaged food item, comprising:
a. a first film comprising an outer sealant layer comprising a heat-sealable material of ethylene/vinyl acetate copolymer (EVA) comprising at least 12% (wt.) vinyl acetate content and a melt index of at least 20 g/10 min. as measured in accordance with ASTM D-1238 test method at 190° C./2.16 kg; wherein the first film defines a food item receiving space;
b. a second film comprising an outer layer comprising an absorbent material comprising cellulose or paper-based materials and a second layer comprising a polymeric bonding material comprising a non-oriented polyethylene layer; wherein the second film defines a food item platform upon which liquids released from the food item are absorbed therein; and
c. a peelable seal formed between the outer sealant layer of the first film and the absorbent material comprising cellulose or paper-based materials of the outer layer of the second film to enclose the food item therein and comprising a peel strength of at least 100 gram/inch at a temperature of 149° C. (300° F.) and not greater than 857 gram/inch at a temperature of 166° C. (331° F.);
wherein the outer sealant layer of the first film comprising the heat-sealable material of ethylene/vinyl acetate copolymer (EVA) is in contact with the second layer of the second film comprising the polymeric bonding material layer, and wherein the outer sealant layer of the first film comprises the heat-sealable material of ethylene/vinyl acetate copolymer (EVA) in an amount from greater than 35% to 100% by weight of the outer layer.
2. The package of claim 1 , wherein the ethylene/vinyl acetate copolymer (EVA) has a melt index of at least 30 g/10 min. as measured in accordance with ASTM D-1238 test method at 190° C./2.16 kg.
3. The package of claim 1 , wherein the ethylene/vinyl acetate copolymer (EVA) has at least 18% (wt.) vinyl acetate content.
4. The package of claim 1 , wherein the absorbent material has a water absorption capacity of at least 500%.
5. The package of claim 1 , wherein the absorbent material has a basis weight of at least 54 grams per square meter.
6. The package of claim 1 , wherein the polymeric bonding material comprises a non-oriented low density polyethylene layer.
7. The package of claim 1 , wherein the peelable seal has a seal strength of at least 200 gram/inch at a temperature of 149° C. (300° F.).
8. The package of claim 1 , wherein the peelable seal has a seal strength of at least 300 gram/inch at a temperature of 149° C. (300° F.).
9. The package of claim 1 , wherein the absorbent material comprises cellulosic or paper-based fibers and polyolefin synthetic fibers.
10. The package of claim 9 , wherein the absorbent material comprises a cellulosic or paper-based fiber layer and a polyolefin synthetic fiber layer.
11. The package of claim 9 , wherein the absorbent material comprises a blend of cellulose or paper-based fibers and polyolefin synthetic fibers.
12. The package of claim 11 , wherein the polyolefin synthetic fibers comprise polypropylene.
13. The package of claim 1 , wherein the second film further comprises a polymeric support film and wherein the polymeric support film comprises an oriented film.
14. The package of claim 13 , wherein the polymeric support film comprises an oriented film of polyethylene terephthalate, polypropylene or polyamide.