Reasons For The Formation Of Pinholes in Aluminium Foil?

The formation of pinholes is related to a variety of factors, including dust in the rolling process, impurities in the rolling oil, the material's gas content, adulteration, compounds and compositional segregation.
Solution: Reduce pinholes through aluminium liquid purification, filtration and grain refinement; improve the hardening characteristics of the material, e.g. by alloying; ensure effective filtration of rolling oil, regular replacement of rolls and implementation of dust prevention measures.

Question 2: How can I assess the pinhole condition of aluminium foil?

The pinhole condition of aluminium foils is usually assessed by the number and size of pinholes. 6μm aluminium foils cannot be completely free of pinholes, but the number and size of pinholes can be reduced by controlling the rolling conditions and the quality of the material.
Solution: Quantify the pinholes in aluminium foils using an effective assessment method, such as the number of pinholes per square metre. At the same time, endeavour to reduce the number and size of pinholes by improving rolling conditions and material quality.