Three part high moisture barrier for packages
AssigneeKloeckner Pentaplast of America, Inc.
InventorsMark Ralph Miller, Kevin Junior Carter
Life of this patent
Estimating the term…
Abstract
A three part laminated material for use in making blister packages and a method of making such a material. The material is comprised of a central core layer of fluoro-polymer based sheet material to each side of which a separate polymer film is adhesively attached. These separate films may be symmetrical or asymmetrical as regards each other. In the preferred embodiment, each of the polymer films is polyvinyl chloride, although a variety of chemically different films may be used. The disclosed material provides a high moisture barrier, reduced package curl, a stable inter-laminar structure and outer surfaces which lend themselves well to bonding with other materials as well as to printing and coating.
Claims21
A thermoformable, unoriented, three-layer, dry bond laminated material having moisture vapor barrier characteristics and a crystallinity level suitable for use in manufacturing a blister package for pharmaceuticals comprised of:
- a two-sided core layer of poly chloro-tri-fluoro ethylene;
- a first polymer film attached to a first side of said core layer;
- and
- a second polymer film attached to the opposing side of said core layer, wherein said first polymer film and said second polymer film are symmetrical with regard to each other both as to both thickness and chemical composition of material used and wherein further the laminated material has a crystallinity level of 35% or less.
A thermoformable, unoriented, three-layer, dry bond laminated material having moisture vapor barrier characteristics and a crystallinity level suitable for use in manufacturing a blister package for pharmaceuticals comprised of:
- a two-sided core layer of poly chloro-tri-fluoro ethylene;
- a first polymer film attached to a first side of said core layer;
- and
- a second polymer film attached to the opposing side of said core layer, wherein said first polymer film and said second polymer film are asymmetrical with regard to each other as to either thickness or chemical composition of material used or both thickness and chemical composition of material used and wherein further the laminated material has a crystallinity level of 35% or less.
A thermoformable, unoriented, three-layer, dry bond laminated material having moisture vapor barrier characteristics and a crystallinity level suitable for use in manufacturing a blister package for pharmaceuticals comprised of:
- a two-sided core layer of polyvinylidene chloride having a thickness of at least 0.3 mils but not more than 5.0 mils;
- a first PVC layer having a thickness of at least 0.5 mils but not more than 15 mils adhesively attached by means of a heat-activated dry bond laminating adhesive to a first side of said core layer;
- and
- a second PVC layer having a thickness of at least 0.5 mils but not more than 15 mils adhesively attached by means of a heat-activated dry bond laminating adhesive to a second side of said core layer.
Dependencies are inferred from the claim text.