Three part high moisture barrier for packages
AssigneeKloeckner Pentaplast of America, Inc.
InventorsMark Ralph Miller, Kevin Junior Carter
Life of this patent
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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. 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, a stable inter-laminar structure and outer surfaces which lend themselves well to bonding with other materials.
Claims10
A thermoformable, unoriented, dry-bond laminated material having moisture vapor barrier characteristics and a crystallinity level suitable for use in a blister package for pharmaceuticals comprised of:
- a poly chloro-tri-fluoro ethylene core layer;
- 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 the laminated material has a crystallinity level of 35% or less.
A thermoformable, unoriented, dry-bond laminated material having moisture vapor barrier characteristics and a crystallinity level suitable for use in a blister package for pharmaceuticals comprised of:
- a poly chloro-tri-fluoro ethylene core layer having a thickness of at least 0.6 mils but not more than 3.0 mils;
- a first polyvinyl chloride film having a thickness of at least 5.0 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 polyvinyl chloride film having a thickness of at least 5.0 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,
- wherein the laminated material has a crystallinity level of 35% or less.
Dependencies are inferred from the claim text.