Method and apparatus for heat resistant coatings
AssigneeHazen Paper Company
InventorsJohn Hazen, Larry Hoague
Life of this patent
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Abstract
A blister pack includes a housing having a plurality of cavities and a multi-layer film sealed to the housing and enclosing the cavities, the multi-layer film including a base layer, at least one security element, and a heat protective layer. The heat protective layer is comprised of one of an amorphous polymer material or a semi-crystalline polymer material and is positioned to insulate the at least one security element from heat applied to the heat protective layer during heat sealing of the multi-layer film to the housing, the heat protective layer functioning as a heat sink for protection of the at least one security element during heat sealing of the multi-layer film to the housing.
Claims15
A blister pack, comprising:
- a housing having a plurality of cavities;
- and
- a multi-layer film sealed to the housing and enclosing the cavities, the multi-layer film including a base layer, at least one security element, and a heat protective layer;
- wherein the heat protective layer is comprised of one of an amorphous polymer material or a semi-crystalline polymer material and is positioned to insulate the at least one security element from heat applied to the heat protective layer during heat sealing of the multi-layer film to the housing, the heat protective layer functioning as a heat sink for protection of the at least one security element during heat sealing of the multi-layer film to the housing;
- wherein the heat protective layer comprises a first semi-crystalline polymer material arranged in discrete patches within the heat protective layer, and a second semi-crystalline polymer material arranged in discrete patches within the heat protective layer, the first semi-crystalline polymer material having a Tg that is different than a Tg of the second semi-crystalline polymer material.
A blister pack, comprising:
- a housing having a plurality of cavities;
- and
- a multi-layer film sealed to the housing and enclosing the cavities, the multi-layer film including a base layer, at least one security element, and a heat protective layer;
- wherein the heat protective layer is comprised of one of an amorphous polymer material or a semi-crystalline polymer material and is positioned to insulate the at least one security element from heat applied to the heat protective layer during heat sealing of the multi-layer film to the housing, the heat protective layer functioning as a heat sink for protection of the at least one security element during heat sealing of the multi-layer film to the housing;
- wherein the heat protective layer varies in thickness and includes at least one thicker area aligned with the at least one security element, and at least one thinner area that is located out of alignment with the at least one security element.
A blister pack, comprising;
- a housing having a plurality of cavities;
- a multi-layer film sealed to the housing and enclosing the cavities, the multi-layer film including a base layer including an adhesive layer, a security layer having at least one security element, and a heat protective layer;
- and
- an adhesive layer intermediate the base layer and the housing, the adhesive layer adhering the multi-layer film to the housing;
- wherein the heat protective layer is comprised of a polymer material and is positioned to insulate the at least one security element from heat applied to the heat protection layer during heat sealing of the multi-layer film to the housing, the heat protective layer functioning as a heat sink for reduction of transmission of heat and protection of the at least one security element;
- wherein the polymer material has a Tg of greater than or equal to 85° C.;
- wherein the adhesive layer has an activation temperature range of 135° C. to 160° C.;
- and
- wherein the heat protective layer varies in thickness and includes at least one thicker area aligned with the at least one security element, and at least one thinner area that is located out of alignment with the at least one security element.
Dependencies are inferred from the claim text.