The History of Cold Formed Foil

As a high-end version of blister packaging material, cold stamped aluminum appeared in the middle and late 20th century, and after the structural iteration of the product, it became the very widely used three-layer composite rigid sheet structure.

What is Cold Formed Foil?

Cold stamping aluminum, also known as cold aluminum and hard double aluminum, is a three-layer composite material of nylon, aluminum foil and PVC. Mainly used in blister packaging and sealed with PTP foil.

The origin of cold forming foil?

Cold-formed blister packaging, like other pharmaceutical packaging, originated in food packaging applications. In the 1970s, the earliest cold-formed blister prototypes were used to package jams. Then in the mid-1970s, Bayer teamed up with some material scientists to find a suitable packaging for aspirin tablets. At that time, the bottom application structure they chose was PE/ALU/OPA, which is a packaging material similar to tear-off film. It was not until the end of the 1970s that the cold-formed blister evolved into our current structure of OPA/ALU/PVC, which is well temperature-free heat-sealed with PTP aluminum foil.

This was a groundbreaking change at the time and brought convenience in three ways:

1. Due to the structural properties of PVC, the cold aluminum packaging is stretched and plastic, so there is no direct pressure on the tablets or capsules in the inner packaging (this is not the same as what happens in flexible strip packaging)

2. During all packaging sealing process, there is no direct temperature contact of the medicine.

3. Higher customer convenience or user friendliness for consumers who use the product (easier to open, PUSH-THROUGH) than stick packs.