Both blister packaging and clamshell packaging are very popular methods of packaging, most commonly, retail products. Many people believe them to be the same thing, but in fact the only thing they have in common is that they are both created using thermoforming. You will see both blister packaging and clamshell packaging all around you in stores, but do you know the difference?
Blister packaging is most commonly used for small consumer goods, pharmaceuticals and food, you will also see it used for things such as batteries. The main difference between clamshell and blister packaging is that blister packaging doesn’t have a hinge like clamshells do. It can be made from the same plastic as clamshell using the same method, thermoforming but the plastic does not cover the whole product. Most commonly, the material of the blister packaging is attached to a cardboard backing with the blister mould holding the product in place on top of the cardboard. This method also provides an easy way for the consumers to open the product by just pulling the plastic back from the cardboard. This is a great way to showcase products and bring attention to them using the cardboard as a promotional tool. The plastic attaches to the card via a strong adhesive.
This method uses a blister sandwiched in between 2 cards that is sealed using a welding machine, it is useful for shorter runs and allows the customer to stand the item in store or hang it on a euroslot. Clamshells were commonly produced as PVC 2 part packages however now there is a desire to have a more environmentally friendly version that incorporates R-Pet plastic and Card that uses oil based inks. These packs are both better for presentation purposes, better for the customer and also a more environmentally sustainable solution.