Method and apparatus for heat resistant coatings

A method of forming a blister pack, comprising the steps of:

• disposing a multi-layer film having a base layer, at least one security element, and a heat protective layer atop a housing having a plurality of cavities;
• and
• applying heat to the heat protective layer to activate an adhesive intermediate the housing and the multi-layer film to seal the multi-layer film to the housing;
• wherein the heat protective layer is configured to insulate the at least one security element from heat during the step of applying heat to the heat protective layer;
• wherein the heat protective layer functions as a heat sink for protection of the at least one security element during the step of applying heat to the heat protective layer.

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, 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 protection of the at least one security element;
• wherein the polymer material has a Tg of greater than or equal to 85° C.;
• and
• wherein the adhesive layer has an activation temperature range of 135° C. to 160° C.