The structure of Alu Alu blister foil, also known as Aluminium Cold Forming Blister Foil, is designed for packaging highly sensitive pharmaceutical and generic medicines that are hygroscopic (moisture-absorbing) or light-sensitive and cannot be suitably packed with barrier plastic films. This type of foil is specifically engineered for cold forming, which is a process used to create blister packs for pharmaceutical products.

The Alu Alu blister foil typically consists of two layers of aluminum foil laminated together. Each layer of aluminum foil provides a high barrier against light, moisture, and oxygen, which is essential for protecting sensitive pharmaceutical products. The foil is also coated on one side to allow for heat sealing during the blister pack formation process.

alu-alu blister foil

The Alu Alu blister foil typically consists of two layers of aluminum foil laminated together. Each layer of aluminum foil provides a high barrier against light, moisture, and oxygen, which is essential for protecting sensitive pharmaceutical products. The foil is also coated on one side to allow for heat sealing during the blister pack formation process.

Alu-Alu blister packaging typically consists of three layers:

Outer Layer (25-micron PVC film): A layer of aluminum foil that is coated with a heat-sealable layer. This layer is usually the one that is heat-sealed to form the blister pack.
Inner Layer (45-micron aluminum foil): Another layer of aluminum foil that provides additional barrier properties and strength to the blister pack.

The exact thickness and composition of Alu Alu blister foil may vary depending on the specific requirements of the pharmaceutical products being packaged. In some cases, Alu Alu blister foil may be replaced by a structure containing special polyester film and soft aluminum foil. This new structure is composed of 36 micron special polyester / 50 micron soft aluminum foil / 36 micron special polyester composition, providing an alternative to traditional Alu Alu laminates for pharmaceutical packaging.