Antifog sealant composition and coextruded multilayer polyester film including the same
AssigneeCryovac, Inc.
InventorsRoberto Forloni, Aida Haxhi
Life of this patent
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Abstract
The invention relates to a sealant antifog composition for polyester films comprising anionic and non-ionic surfactants in a mixture of amorphous and (semi)crystalline polyesters. The invention also relates to a multi-layer film comprising a sealant layer having the above composition, to the use of said films in food packaging and to the packages obtained therefrom.
Claims18
A sealant antifog composition for polyester films comprising
- a1) an anionic surfactant, in an amount of at least 1% by weight,
- a2) a non-ionic surfactant, in an amount of at least 0.5% by weight,
- b) at least one amorphous (co)polyesters in an amount between 10% and 85% by weight,
- c) at least one (semi)crystalline polyester in an amount between 10% and 85% by weight, and
- wherein component b) and c) are present in a total amount of at least 70% by weight, all the percentages by weight being referred to the total weight of the composition.
An antifog heat-sealable multilayer packaging film comprising at least:
- 1) A sealant layer consisting of
- a1) an anionic surfactant, in an amount of at least 1% by weight,
- a2) a non-ionic surfactant, in an amount of at least 0.5% by weight,
- b) at least one amorphous (co)polyesters in an amount between 10% and 85% by weight,
- c) at least one (semi)crystalline polyester in an amount between 10% and 85% by weight, and
- wherein component b) and c) are present in a total amount of at least 70% by weight,
- all the percentages by weight being referred to the total weight of the composition;
- and
- d) optionally an ethylene-alpha-olefin copolymer,
- 2) a polyester containing layer, and
- 3) an outer polyester containing layer.
A wrapped package comprising a product, placed on a support and a film wrapped around said product or around both the product and the support, wherein the sealant layer of the film is in contact with or faces the product,
- wherein the film is an antifog heat-sealable multilayer packaging film comprising at least:
- 1) A sealant layer consisting of
- a1) an anionic surfactant, in an amount of at least 1% by weight,
- a2) a non-ionic surfactant, in an amount of at least 0.5% by weight,
- b) at least one amorphous (co)polyesters in an amount between 10% and 85% by weight,
- c) at least one (semi)crystalline polyester in an amount between 10% and 85% by weight, and
- d) optionally an ethylene-alpha-olefin copolymer,
- wherein component b) and c) are present in a total amount of at least 70% by weight,
- all the percentages by weight being referred to the total weight of the composition;
- and
- 2) A polyester containing layer.
Dependencies are inferred from the claim text.