
The purpose of the blister pack
The purpose of the Blister Pack
Blister pack is a term for several types of preformed plastic packaging used for small consumer goods, foods, fruits
and for pharmaceuticals.
Clamshell
Main article: Clamshell(Containers)
A hinged blister is known as a clamshell, used for a variety of products. It can be used as a security package
to deter package pilferage for small highvalue items, such as consumer electronics. It consists of one
sheet folded over onto itself and sometimes fused at the edges. They can be securely heat sealed, making
them difficult to open by hand to deter tampering. A pair of scissors or a sharp knife is often required to
open them (although these are often sold in similar packages).Care must be used to safely open some of
these packages, as 6,000 Americans are sent to the emergency room each year by injuries suffered in
opening such packages. Wrap rage is sometimes the result.
Medical blisters
Medical blister trays differ from Pharmaceutical blister packs in that these are not pushthrough packs. The
thermoformed base web is made of a thicker plastic sheet, generally between 500µ to 1000µ andcan not be
collapsed, thus forming a solid tray. The lidding film provides a peelopen feature and is generally porous to
allow sterilization (such as the Dupont medical Tyvek material). Such medical blister packs are used for medical devices, used in hospitals.
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