Notes on the production process of aluminium foil for pharmaceuticals

Notes on the production process of aluminium foil for pharmaceuticals

Pharmaceutical aluminium foil is used in a wide range of applications in our daily lives. The main uses of pharmaceutical foil are blister packaging for pharmaceutical capsules and tablets, as well as pouch packaging for powders, granules and water. Due to its direct contact with edible medicines, the national requirements for pharmaceutical foil are very strict in terms of appearance and performance.

There are two common alloys of foil available on the market, 8011 and 8021, with 8011 generally being less than 0.05mm thick and 8021 being more than 0.05mm thick. Broadly speaking, the main production processes are: billet inspection - billet rolling - billet rolling - roll rolling - slitting - furnace annealing - packaging of finished products. The surface of aluminium foil for medicine requires no oil, no bright crystals, no black lines, no pinholes, no yellow spots, no ruffles, etc. In the production process, the control of the surface and performance is mainly for the following points.

First, we must first control the quality from the source, strict inspection of the blank;

Second, then in the rolling process, through the cleaning of the rolls and roughness control, the choice of rolling oil, reduce the viscosity of the rolling oil and control the machine running speed to control the surface quality;

Third, again, in the slitting process, to ensure that the edge of the aluminum coil when slitting part of the neat, can not appear ruffled edge and other quality problems;

Fourth, finally in the annealing process, according to the performance requirements of the pharmaceutical foil to control the annealing time and annealing temperature, to ensure clean oil removal.

With the development of the pharmaceutical industry, aluminium foil for pharmaceutical use, with its excellent moisture resistance, barrier, chemical resistance, chemical stability, hygiene, the proportion of applications continues to rise, the appearance and quality requirements are also increasingly high, the market has a broad prospect.