Aluminum foil can provide a complete barrier to light, oxygen, moisture and bacteria.For Aluminum Foil Factories, good technology and high quality control are particularly important.
Pinholes, commonly known as trachoma, are one of the important quality indicators of high-quality double-sheet aluminum foil. Metallurgical defects of aluminum foil blanks and rolling processes can occur. Such as the degree of purification of the melt, including hydrogen content, slag inclusion and the size and content of compounds, hot-rolled aluminum adhesion, air passages during casting and rolling, production environment and rolling oil pollution, surface rubbing of roll guides Scratches are all factors in the production of pinholes. The thinner the foil, the greater the number of pinholes. The process parameters of the aluminum foil rolling process play an important role in controlling the generation of pinholes. The greater the surface roughness of the roll, the greater the rolling speed and tension, the poorer shape and the excessive reduction rate, and the number of pinholes has a tendency to increase. . Therefore, it is the key to control pinhole defects to distinguish the causes of pinholes and take corresponding measures. The fewer pinholes the aluminum foil factory controls, the better the quality of the aluminum foil, which is widely used in food and pharmaceutical packaging. It is also used to create aseptic packaging to store perishable goods without refrigeration.
As a large-scale processed product, aluminum foil is generally purchased in tons. The minimum aluminum foil master roll generally starts at about 8 tons. During the casting process, the optimum grain size is controlled, which has a decisive influence on the processability and surface appearance of the foil during rolling and finishing. A first-order equiaxed grain size is required. According to the survey, the grain size of 7.0mm cast-rolled sheet is generally ≤70μm, and the average grain size of aluminum foil blank imported from a certain country is 63.3μm. In order to control the grain size, in addition to controlling the Fe/Si ratio during batching and strictly implementing the smelting process, the electromagnetic casting method (EMC) can produce cast ingots with smooth surfaces, no segregation and fine grains, which greatly improves the quality of the ingots. In addition, adding AlTiB wire for melt modification treatment is also a grain refinement method commonly used in casting and rolling.
Aluminum Foil is Food Grade packaging material that has not yet replaced. It can not only be used for household and food packaging, but also meet higher requirements such as pharmaceutical packaging. Can effectively protect food or use for cooking. Become the preferred raw material for Household Aluminum Foil Rolls. Factors that affect price are alloy, temper, thickness, width, and quantity. Therefore, when consulting specific aluminum foil quotations, you need to provide these data to facilitate our professional sales calculations. Don't worry if you're not sure about the specs you want, just tell us your country and usage, and we can recommend the best-selling specs for your market.
