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US 2002/0120046 A1Published application
High temperature polyester film extrusion
AssigneePolymer Group, Inc.
InventorsKevin Paul Osborn, Larry H. McAmish
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AssigneePolymer Group, Inc.
InventorsKevin Paul Osborn, Larry H. McAmish
Estimating the term…
The present invention is directed to the method of extruding a thermoplastic co-polyester EMA (ethyl methyl acrylate) blended film at temperatures well above the melt temperature of the base thermoplastic co-polyester, the co-polyester/EMA film having enhanced barrier properties. Notably, the present invention contemplates extrusion of co-polyester compounds onto suitable substrates without the need to employ antioxidant compounds in the molten polymer material. A further aspect of the present invention entails a film comprising an EMA and co-polyester thermoplastic admixed with a compatibilizer and extruded at a temperature at least 10% higher than the melt temperature, which in turn provides the co-polyester film with durable adhesive properties in addition to good breathability as measured by moisture vapor transmission rate (MVTR).
A method of forming a co-polyester blended film comprising the steps of;
A method of forming a co-polyester blended film comprising the steps of;
A film comprising a co-polyester blended thermoplastic admixed with compatibilizers and extruded at a temperature at least 10% higher than the melt temperature of the co-polyester, wherein said extruded thermoplastic has no more than about 1.0%, by weight, of any antioxidant compound.
A liquid-barrier composite material comprising said film exhibiting durable adhesion to said base material, wherein said composite material is used as a topsheet in a hygiene article.
A liquid-barrier composite material comprising said film exhibiting durable adhesion to said base material, wherein said material is used as a backsheet in a hygiene article.
Dependencies are inferred from the claim text.