Granted Patent B2

US 7,201,968 · App. 10/820,925 · Granted Apr 10, 2007

Abstract

Claims (11)

1. A pouch comprising a multilayer film having at least one sealant layer, wherein said sealant layer comprises:

i) at least a copolymer of propylene and α-olefins, said copolymer having a melting point less than 155° C. when measured according to ASTM D 3418, and

ii) at least a copolymer of ethylene and alkyl acrylate, wherein the alkyl acrylate is present in an amount ranging from about 1 to less than 9 weight percent, relative to the weight of the sealant composition.

2. A pouch of claim 1 , wherein the amount of alkyl acrylate present in said copolymer of ethylene and alkyl acrylate of said sealant layer ranges from about 1 to about 6 weight percent, relative to the weight of the sealant composition.

3. A pouch of claim 1 , wherein the alkyl acrylate is selected from the group consisting of methyl acrylate and butyl acrylate.

4. A pouch of claim 1 , wherein the copolymer of propylene and α-olefins has a melting point less than 148° C. measured according to ASTM D 3418.

5. A pouch of claim 1 , wherein the copolymer of propylene and α-olefins is selected from the group consisting of random copolymers of propylene and ethylene and terpolymers of propylene, ethylene and butene.

6. A pouch of claim 1 wherein said multilayer film comprises at least one substrate layer and at least one sealant layer.

7. A package having a lid and a sealant layer laminated to said lid, wherein said sealant layer comprises

i) at least a copolymer of propylene and α-olefins, said copolymer having a melting point less than 155° C. when measured according to ASTM D 3418, and

ii) at least a copolymer of ethylene and alkyl acrylate, wherein the alkyl acrylate is present in an amount ranging from about 1 to less than 9 weight percent, relative to the weight of the sealant composition.

Assignments (9)