Blister Sealing is used extensively in the packaging industry for sealing thermoformed display packages to a laminated cardboard or reinforced backing material. Our blister sealing dies are used extensively in commercial heating presses. The blister dies or trays, as they are commonly refered to, are made of either a plywood or aluminum frame contoured to the thermoforms shape in order to provide alignment relative to the backing material. The backing material is located on the die by means of material alignment pins. A silicon rubber pad aids in applying an even pressure in the areas where the thermoform seals to the backing material.

In the packaging of medical & pharmaceutical products, whereby the tooling must be utilized in a sterile environment, an anodized aluminum frame is used. In addition, the silicone rubber pads are made of a molded rubber that is ground flat to ensure an air-tight seal.