Cold stamping formed aluminum, as a high-end version of blister packaging material, appeared in the mid to late 20th century, and then underwent structural iterations to become the widely used three-layer composite hard sheet structure today.

What is cold stamping formed aluminum?

Cold stamping formed aluminum, also known as cold aluminum or hard double aluminum, is a material composed of three layers: nylon, aluminum foil, and PVC. Mainly used for blister packaging and sealed packaging with PTP aluminum foil.

The origin of cold stamping aluminum?

The packaging of cold formed blister packs, like other pharmaceutical packaging, originated from the application of food packaging. In the 1970s, the earliest prototype of cold formed foam was used to package jam. In the mid-1970s, Bayer teamed up with some materials scientists to find suitable packaging for aspirin tablets. At that time, they chose PE/ALU/OPA as the bottom application structure, which is a packaging material similar to a tear film. It was not until the late 1970s that the cold formed blister evolved into our current use structure OPA/ALU/PVC, and was well heat sealed with PTP aluminum foil without temperature.

At that time, this was a groundbreaking change that brought convenience in the following three aspects:

Due to the structural characteristics of PVC, the packaging material of cold aluminum is stretched and plasticized, so there is no direct pressure on the tablets or capsules for internal packaging (which is different from what happens in soft strip packaging)

During all packaging and sealing processes, the drug does not come into direct temperature contact.

Compared to strip packaging, consumers who use the product (easier to open, PUSH-THOUGH) have higher customer convenience or user friendliness.