A production process of high-clean surface medical aluminum foil

Abstract

The invention belongs to the technical field of non-ferrous metal processing, and relates to a production process of medicinal aluminum foil with a high clean surface, comprising: an aluminum foil blank with a thickness of 0.25 to 0.35 mm and a hardness of H16 conforming to the 8011 alloy standard, which is subjected to rough rolling and intermediate rolling to obtain double aluminum foil. Aluminum thin plate with a thickness of about 0.04mm before being combined; after oiling in the middle of the coil, it is transferred to the finishing mill for double finish rolling; the medicine foil after double rolling is divided according to the delivery specifications and the needs of soft and hard states. The cutting machine is used for slitting, the aluminum foil delivered in soft state is annealed, and the aluminum foil delivered in hard state is inspected according to the requirements of surface wetting tension and heat seal strength value, and the packaging is delivered after passing the test. Produced with pure base oil, the viscosity of the rolling oil is small, the rolling oil film is thin, and the molecular adsorption ability of trace polar molecules on the surface of the aluminum foil is weak. Under the hot air blowing at 80-100 ℃, the residual rolling oil on the surface of the aluminum foil is easy to volatilize . The produced hard pharmaceutical aluminum foil has no oil stains, no black oil lines on the surface, high wetting tension and high heat sealing strength.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and relates to a preparation process of aluminum foil, in particular to a production process of a medicinal aluminum foil with a high clean surface. Background technique [0002] Pharmaceutical aluminum foil has excellent light-shielding properties, moisture-proof properties, good gas barrier, and taste-preserving properties. It has an outstanding protective effect on pharmaceuticals. It also has good processing adaptability in packaging, and is very suitable for aluminum foil for pharmaceutical packaging. Because of the particularity of medicines, the aluminum foil used as packaging material is required to have a high-clean surface: no oil stains, no black oil spots and black oil lines on the surface formed by the accumulation of aluminum powder, etc. that affect the surface quality. As high as the value of the surface, in order to facilitate the aluminum-plastic composite st...

AI Technical Summary

Problems solved by technology

In earlier models of rolling mills, due to the inconsistent speed of the exit guide roller and the exit aluminum foil, relative friction occurred, and black oil lines of different lengths were formed on the surface of the aluminum foil, which seriously affected the surface quality and hygienic quality of the medicinal aluminum foil.

For pharmaceutical foil delivered in a hard state, because it is no longer annealed, the wetting tension value of the front surface of the aluminum foil is often low due to the residual oil on the surface of the aluminum foil, which seriously affects the strength of the aluminum-plastic composite heat seal, thus failing to meet the quality requirements of high-quality pharmaceutical aluminum foil

Images