How long can the sealing effect of heat sealing induction aluminum foil last?

The sealing effect of heat sealing induction aluminum foil usually lasts 5-10 years or longer, but it is also affected by the following factors:
Material factor
Aluminum foil quality: Aluminum foil with high purity, uniform thickness and excellent texture can provide better barrier properties and physical strength, which can keep the sealing effect longer.
Hot sealing coating: The composition, performance and fastness of the hot sealing coating to the aluminum foil are very important. High quality heat sealing coating, its melting point, fluidity and binding force with the sealed material and other properties are good, can form a firm seal, so that the sealing effect lasts a long time; If the quality of the heat sealing coating is poor, it may lead to poor heat sealing, and the sealing effect is greatly reduced.
Sealed object factor
Properties of the sealed substance: If the sealed substance is a corrosive chemical substance, volatile liquid, etc., it may damage the sealing structure of the heat sealing induction aluminum foil and shorten the duration of the sealing effect; For ordinary dry solid items, etc., the effect on sealing is small, and the sealing effect lasts relatively long.
The surface characteristics of the sealed object: the surface of the sealed object is smooth and flat, and the heat sealing induction aluminum foil can fit well with it to form a uniform and firm seal, and the sealing effect lasts for a long time; If the surface is rough, uneven or there are impurities such as oil, it will affect the bonding effect of heat sealing, resulting in local sealing is not strong, which may reduce the sealing effect in a short time.
Environmental factor
Temperature: The high temperature environment may make the heat sealing layer of the heat sealing induction aluminum foil aging and embrittlement, and the low temperature environment may make the heat sealing layer more brittle and reduce the sealing strength. In general, in an environment where the temperature is too high (such as more than 60 ° C) or too low (such as below -20 ° C), the sealing effect may be significantly reduced within 5 years.
Humidity: In a high humidity environment, the heat sealing induction aluminum foil may absorb water, affecting the binding force between the heat sealing layer and the sealed material, so that the sealing effect is worse, may be in the relative humidity of more than 80% of the environment, 5-8 years of sealing effect will be significantly reduced.
Light: long-term strong light irradiation, especially ultraviolet irradiation, may cause the material properties of aluminum foil and heat sealing layer to change, resulting in reduced sealing effect.
Operational process factor
Heat sealing parameters: heat sealing temperature, pressure and time are key factors. If the heat sealing temperature is too low, the pressure is insufficient or the time is too short, the heat sealing layer cannot fully melt and fuse with the sealed material, which will lead to weak sealing and short sealing effect. The temperature is too high, the pressure is too large or the time is too long, which may cause the heat seal layer to overheat, the aluminum foil deformation and damage, and also affect the long-term effect of the seal.
Heat sealing equipment: The performance and accuracy of the equipment will also affect the quality of heat sealing. The heat sealing equipment with stable performance and high precision can control the heat sealing parameters more accurately, achieve good heat sealing effect, and make the sealing effect last longer; On the contrary, it may lead to unstable thermal sealing quality, and the sealing effect is difficult to guarantee