Multilayer polyester film for ready meals
AssigneeVac, Inc
InventorRoberto Forloni
Life of this patent
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Abstract
Coextruded, biaxially oriented multilayer films comprising a base layer comprising a polyester having an intrinsic viscosity greater than 0.75 dl/g and a heat-sealable layer directly adhered to said base layer, said heat-sealable layer comprising an amorphous polyester having a melting temperature not higher than the melting temperature of the polyester of the base layer and a thermoplastic resin characterized in that the heat-sealable layer comprises a further polyester resin are described. Also packages comprising a container, a food product and the above coextruded, biaxially oriented multilayer film are described. The packages are particularly suitable for “ready-meals” to be used in conventional oven at high temperatures.
Claims19
A coextruded, biaxially oriented multilayer film comprising
- a base layer comprising a polyester having an intrinsic viscosity measured according to ASTM method D4603-03 greater than 0.75 dl/g and a heat-sealable layer directly adhered to said base layer, said heat-sealable layer comprising
- from about 25% to 70% by weight of an amorphous polyester having a melting temperature not higher than the melting temperature of the polyester of the base layer, wherein said amorphous polyester is derived from an aliphatic dial and a cycloaliphatic diol with one or more dicarboxylic acids,
- from 10% to 20% by weight of a thermoplastic resin and
- from 20% to 60% by weight of a further polyester.
Dependencies are inferred from the claim text.