Aluminum Foil For Flexible Packaging Applications
For flexible packaging aluminum foil, pinholes are the most important indicator, especially 12 and 15 micron aluminum foil. Since this is commonly used in general households, there are no other materials and no need for lamination. This thickness should be pinhole-free. The aluminum foil used for composite is generally 0.5mic-0.9mic, which has strict requirements on the number of pinholes, otherwise the best sealing effect will not be achieved, and it can only play a supporting role. There is a theory that pinholes with a diameter of less than 0.005mm are impermeable, but practice has proved that they are breathable and water-permeable pinholes. It's just a matter of air permeability and water permeability. The pinhole-free aluminum foil can be regarded as zero air permeability and water permeability. One pinhole of φ0.3mm per square meter accounts for 9ppm of the total area, and 30 pinholes account for 3ppm of the total area. Experiments show that the air tightness and water impermeability of composite aluminum foil are more than a million times worse than that of single-layer aluminum foil. Usually the diameter of pinholes is about 0.05mm-0.3mm, so the relationship between the number of pinholes and air permeability can be determined. The area of the pinhole is proportional to the square of the diameter, so the area of a 0.03mm pinhole is 100 times different from the area of a 0.3mm pinhole. The pinhole-free aluminum foil is completely opaque. On the other hand, mechanical performance requirements are one of the characteristics of this type of aluminum foil. Since this type of aluminum foil needs to be sealed and deformed by hot pressing, proper plasticity becomes very important. The quality of our products conforms to international general standards, and we can provide free test reports upon delivery. If there are other requirements, we have professional engineers. Can be negotiated.
Jumbo Reels Of Aluminum For Household is to prevent moisture loss and keep the food fresh and tender
