The process of joining two or more thermoplastic films or sheets by heating areas in contact with each other to the temperature at which fusion occurs, usually aided by pressure. When the heat is applied by dies or rotating wheels maintained at a constant temperature, the process is called thermal sealing.

Heat seal card-to-card blister packaging is the combination of a fold-over, or separate front and back blister card and a transparent blister, bonded under heat and pressure. Together, blister and card form a beautiful, highly visible shelf presentation of your product.