Blisters

With seal blisters, the entire product is normally covered with plastic, but part or most of the print card is left uncovered. Although there are more than three types of seal blister packaging methods, the ones listed below are the most commonly found.

Face Seal Blister

Face seal blister packaging is the method by which only the actual product is surrounded by plastic while the remaining print card remains uncovered. In this process, the plastic is molded to conform to the shape of the product. Once the product is placed inside, the flanges on the plastic blister are then heat sealed onto the print card.

Full Card Seal

Full card seal packaging consists of the plastic covering the product as well as the entire face of the print card. It is either heat sealed onto the print card or the print card is slid through flanges created on the side of the blister. This type of blister packaging helps to reinforce the print card and the hang hole for heavier items. It also protects the print card from getting bent and damaged.

Trap Blister

Trap blister (also called a sandwich blister) consists of the blister being inserted between the layers of the paperboard. A type of adhesive coating is placed on the inside of the paperboard which causes it to only stick to itself when pressed together. The adhesive, in combination with flanges on the blister, trap the blister and product in place. A piece of corrugated cardboard can also be used to provide more stiffness to the paperboard. It is tear-resistant, making it a theft deterrent in stores, but is easy to open by consumers at home. This type of packaging is on the rise due to the security and strength it can provide at a low cost using mostly renewable resources.