Filayen blister na wurare masu zafi da foil ɗin da aka kafa mai sanyi duka kayan tattarawa ne na magani., gabaɗaya ana magana da shi azaman aluminium na wurare masu zafi da aluminium sanyi. Karfe na aluminum da aka fi amfani dasu sune 1000 jerin 8000 jerin (8011 8021), although both of them are used for pharmaceutical packaging, but they are very different in material.

Tropical aluminum is a composite of nylon and pure aluminum. The cold aluminum is made of nylon, tsarkakakkiyar alalum, and pvc. PA/AL is also compounded with adhesive. AL needs to be coated with adhesive (VC) to be heat-sealed with PVC, so tropical aluminum is also expressed as PA/AL/VC. The medicine is packaged into: PA/AL + PVC + PTP, and the medicine is between the PVC bubble and PTP.

Cold aluminum: Each layer is compounded with adhesive, and the structure is PA/AL/PVC. When using, the PVC layer is heat-sealed with the adhesive (VC) on the PTP; the medicine packaging method is: PA/AL/PVC + PTP, and the medicine is between the PA/AL/PVC foam and the PTP.

The biggest difference between the two is that tropical aluminum is used for heat sealing with pvc, while cold aluminum is directly used for charging.