Smokable synthetic food-packaging film

Claim 2

A smoked food package produced by packaging a foodstuff with a smokable film and smoking the packaged foodstuff wherein the smokable food-packaging film comprises at least one layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% α-olefin-vinyl alcohol copolymer, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of said film being 20 to 60 μm.

Claim 3

The smoked food package according to claim 1, wherein said polyamide is nylon 6-66, nylon 6-12 or a mixture thereof.

Claim 4

The smoked food package according to claim 1, wherein said α-olefin is ethylene, propylene, or butene-1.

Claim 5

The smoked food package according to claim 1, wherein the vinyl units in said α-olefin-vinyl alcohol copolymer range from 40 to 80 mol%.

Claim 6

A smoked food package produced by packaging a foodstuff with a smokable film and smoking the packaged foodstuff wherein the smokable film comprises: a layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% of an α-olefin-vinyl alcohol copolymer; at least one layer of a thermoplastic material selected from the group consisting of (a) an α-olefin copolymer of polyethylene, polypropylene or polybutene-1, (b) a copolymer of ethylene, propylene or butene-1 and vinyl acetate or methacrylic ester, (c) a copolymer of ethylene, propylene or butene-1 and methacrylic acid, or a metal salt thereof, (d) an elastomer of a plasticized polyvinyl chloride, polyester or a styrene rubber, (e) a cellulose and (f) polyamide, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of the layer of said mixture being 20 to 60 μm and the thickness of the layer of said thermoplastic material being 10 to 50 μm.

Claim 7

A smoked food package produced by packaging a foodstuff with a smokable film and smoking the packaged foodstuff wherein the smokable film comprises: a layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% of an α-olefin-vinyl alcohol copolymer; at least one layer of a thermoplastic material selected from the group consisting of (a) an α-olefin copolymer of polyethylene, polypropylene or polybutene-1, (b) a copolymer of ethylene, propylene or butene-1 and vinyl acetate or methacrylic ester, (c) a copolymer of ethylene, propylene or butene-1 and methacrylic acid, or a metal salt thereof, (d) an elastomer of a plasticized polyvinyl chloride, polyester or a styrene rubber, (e) a cellulose and (f) polyamide, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of the layer of said mixture being 20 to 60 μm and the thickness of the layer of said thermoplastic material being 10 to 50 μm.

Claim 8

A smoking process comprising packaging a foodstuff with a smokable film and smoking the packaged foodstuff wherein the smokable film comprises at least one layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% α-olefin-vinyl alcohol copolymer, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of said film being 20 to 60 μm.

Claim 9

A smoking process comprising packaging a foodstuff with a smokable film and smoking the packaged foodstuff wherein the smokable film comprises at least one layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% α-olefin-vinyl alcohol copolymer, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of said film being 20 to 60 μm.

Claim 10

The smoking process according to claim 6, wherein said polyamide is nylon 6-66, nylon 6-12 or a mixture thereof.

Claim 11

The smoking process according to claim 6, wherein said α-olefin is ethylene, propylene, or butene-1.

Claim 12

The smking process according to claim 6, wherein the vinyl units in said α-olefin-vinyl alcohol copolymer range from 40 to 80 mol%.

Claim 13

A smoking process comprising packaging foodstuff with a smokable film and smoking the packaged foodstuff wherein a smokable film comprises a smokable food-packaging film comprising: a layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% of an α-olefin-vinyl alcohol copolymer; at least one layer of a thermoplastic material selected from the group consisting of (a) an α-olefin copolymer of polyethylene, polypropylene or polybutene-1, (b) a copolymer of ethylene, propylene or butene-1 and vinyl acetate or methacrylic ester, (c) a copolymer of ethylene, propylene or butene-1 and methacrylic acid, or a metal salt thereof, (d) an elastomer of a plasticized polyvinyl chloride, polyester or a styrene rubber, (e) a cellulose and (f) a polyamide, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of the layer of said mixture being 20 to 60 μm and the thickness of the layer of said thermoplastic material being 10 to 50 μm.

Claim 14

A smoking process comprising packaging foodstuff with a smokable film and smoking the packaged foodstuff wherein a smokable film comprises a smokable food-packaging film comprising: a layer of a mixture of 50 to 80 wt.% polyamide having a melting point of 120° to 210° C. and a recrystallization temperature of not lower than 50° C. and 20 to 50 wt.% of an α-olefin-vinyl alcohol copolymer; at least one layer of a thermoplastic material selected from the group consisting of (a) an α-olefin copolymer of polyethylene, polypropylene or polybutene-1, (b) a copolymer of ethylene, propylene or butene-1 and vinyl acetate or methacrylic ester, (c) a copolymer of ethylene, propylene or butene-1 and methacrylic acid, or a metal salt thereof, (d) an elastomer of a plasticized polyvinyl chloride, polyester or a styrene rubber, (e) a cellulose and (f) a polyamide, said film having properties of an initial stress of not higher than 0.6 Kg/mm 2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m 2 .day.atm at a temperature of 60° C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m 2 .day.atm at a temperature of 30° C. and a relative humidity of 60%, and the thickness of the layer of said mixture being 20 to 60 μm and the thickness of the layer of said thermoplastic material being 10 to 50 μm.