In our daily life, the application of medicinal aluminum foil is very extensive and mature. The main uses of medicinal foil are blister packaging of pharmaceutical capsules and tablets, as well as bag-like packaging of powder granules and water. Due to its direct contact with foodstuffs, the state has strict requirements on the appearance and performance requirements of the foil.
The common foils on the market have two alloy states, 8011 aluminum foil and 8021 aluminum foil. The 8011 alloys generally have a thickness of less than 0.05 mm (aluminum foil), and the 8021 alloy has a thickness of 0.05 mm or more.
In general, the main production process is: blank inspection - blank rolling - open medium rolling - rolling rolling - rolling finished - slitting - furnace annealing - finished packaging. The surface of medicinal aluminum foil requires no oil stain, no bright crystal, no black line, no pinhole, no yellow spot, no fringe, etc. In the production process, the control of surface and performance is mainly a few points:
First, we must first control the quality from the source and strictly test the blanks;
Second, in the rolling process, the surface quality is controlled by the cleaning of the rolls and the control of the roughness, the selection of the rolling oil, the reduction of the viscosity of the rolling oil and the control of the running speed of the machine;
Third, again, in the process of slitting, it is necessary to ensure that the edge of the aluminum coil is neatly trimmed during slitting, and that quality problems such as ruffles cannot occur;
Fourth, in the annealing process, according to the performance requirements of the foil to control the annealing time and annealing temperature to ensure clean oil.
With the development of the pharmaceutical industry, medicinal aluminum foils have excellent moisture resistance, barrier properties, chemical resistance, chemical stability, hygiene, application ratios, and appearance and quality requirements are increasing. bright future.
