The proper selection of plastic types for Blister Packaging


To form blister packaging, a wide range of plastic materials can be used according to various unique properties. Whether it’s a Blister packaging shell or tray packaging, product owners, marketers, supply chain experts, and packaging designers must be well aware of the properties of different plastic, to form blister packaging to meet their needs.

Let’s start with the first material, PVC (polyvinyl chloride), characterized by excellent mechanical toughness, resistance to chemicals and weather, fire resistance, being more flexible than other materials makes good forming, easy to die cut, and better separation. Not as fragile as cheaper PET. Recyclable symbols can also be identified and blister packaging can be easily molded.

Subsequently, PET or PETE (polyethylene terephthalate) has excellent strength, toughness, dimensional stability, sharpness, and scratch resistance. Nowadays, it is becoming a widely used material because it can be easily recycled and is widely used in the food and beverage industry. It’s also blister packaging that is up to 100% recyclable after consumption.

A third material, PETG (polyethylene terephthalate glycol), has similar properties to PET and is best known for its toughness, clarity, versatility, and ease of use, which the glycol-modified PET form to help blister packaging with better impact resistance. It is often used for medical applications where sterilization by gamma radiation is required, which can be used instead of PVC.

The fourth material is HIPS (High-Quality Polystyrene), a new type of polystyrene with added rubber molecules so that the material can withstand higher impact. However, HIPS has a lower density than PVC and PET, resulting in a higher weight per pound of blister packaging. When hot forming, it has a clear and natural color. It is chemical resistant but it tends to break easily under heavy pressure.

And the last material, PP (Polypropylene), has excellent water, salt, and acid resistance properties. It has excellent toughness and pressure resistance but is brittle at low temperatures. PP has the lowest the plastics’ density in blister packaging. So, it becomes more and more popular nowadays and oftenly used in general packaging.

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