Blister packaging is extensively used in the consumer goods and pharmaceutical industries due to the special type of protection it offers to the product. During the manufacturing process, called thermoforming, a plastic sheet is heated to a temperature which enables flexible forming of the material to a specific shape in a mold. Examples of blister packaging are unit dose packs, carded blister packs and clamshells.
The key features of blister packaging are the visibility, protection and longevity it provides.
Visibility:Blister packaging typically consists of a clear, plastic mold forming a see-through cavity in which the product is encased, thus making it perfectly visible to the consumer. Visibility makes blister packaging ideal for retail display and marketing purposes.
Reinforced protection:Blister packaging is reinforced by one of two ways: (1) by joining a paper board or aluminum sheet to the plastic mold, thus sealing the product in, or (2) by joining two thick-layered half-molds together around a hinge to create a clamshell package, with a blister card in between the two half-molds. Blister packaging thence provides effective protection against mishandling and renders the packaged product tamper-proof.
Longevity:The fully enclosed protection provided by blister packaging also keeps the product completely sealed from its external environment, thus extending the shelf-life of many products and keeping them both safe and suitable for long-term display or storage.
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