During storage, food deterioration is mostly the result of the influence of moisture, oxygen and light (visible light and ultraviolet light). In addition, the mutual migration of ingredients and odors between packaging materials and packaged food may also affect the quality of the food. Good barrier properties are an important reason why aluminum foil food can be widely used in food packaging.
The induction layer of the aluminum foil seal for glass jar must generate eddy current under the alternating current of the electromagnetic induction aluminum foil sealing machine, so the induction layer must be a conductor. Among various metal conductors, aluminum foil is the most ideal one. Because aluminum foil has good ductility, easy processing, good electrical conductivity, and low price, it is very suitable for mass production of aluminum foil gasket sensing layers.
Aluminum foil sealing film is a composite material with sealing performance and anti-counterfeiting effect. It can also prevent product contents from evaporating and contaminating. Sealing aluminum foil usually uses 1235 aluminum foil and 8011 aluminum foil. Heat sealing performance is the most important performance of aluminum foil.
The heat sealing performance of aluminum foil includes heat sealing strength, sealing performance and temperature resistance. These testing items ensure that the aluminum foil can maintain appropriate temperature and pressure during the heating and sealing process to ensure food safety and quality.
Aluminum foil is the carrier of the adhesive layer, and its quality has a great impact on the heat sealing strength of the product. In particular, oil stains on the surface of the aluminum foil can weaken the bonding force between the adhesive layer agent and the aluminum foil. If there is oil on the surface of the aluminum foil and the surface tension is lower than 3.1×10-2μm, it will be difficult to achieve the ideal heat sealing strength, so the quality of the original aluminum foil must be strictly controlled.
Haomei food grade foil aluminum roll testing is carried out according to multiple implementation standards. These standards cover all aspects of the physical properties, chemical properties, health and safety of food-grade aluminum foil, ensuring that the quality of aluminum foil meets food safety standards.