In the current market, anti-static aluminum foil pouches are widely used in many fields such as electronics, chemical industry, military industry and so on with the advantages of moisture-proof, anti-static, anti-electromagnetic interference and so on. However, anti-static aluminum foil bags may face the problem of cracking, which affects the use effect. Today we reveal the 7 major factors that affect the heat sealing strength of anti-static aluminum foil bags.

　　1, raw and auxiliary materials - raw aluminum foil is the carrier of the adhesive layer, and its quality has a deep impact on the heat sealing strength of the product. On the one hand, the surface oil contamination of the raw aluminum foil will weaken the adhesion between the adhesive and the raw aluminum foil. On the other hand, the heat sealing strength is also related to the metal composition of the original aluminum foil and the lack of surface luminosity all affect the heat sealing strength. So we should strictly control the quality of the original aluminum foil.

　　2、Adhesive--Adhesive is a special substance containing solvent, which is coated on the dark side of the original aluminum foil under certain technological conditions, and then dried in the drying channel to form an adhesive layer, which plays a decisive role in the heat sealing strength of the product.

　　3、Production process - under the control of certain process parameters, the adhesive is coated on the surface of the original aluminum foil to form a film, and the quality of the film will directly affect the heat sealing strength of the product. One of the more important parameters such as coating speed. If the coating speed is too fast, the drying temperature is too high, it will make the solvent evaporate too fast on the surface of the coated film, resulting in the residual solvent in the film, and the coated film is not sufficiently dry, which will affect the heat sealing strength of the product.

　 4, heat sealing temperature - heat sealing temperature is an important factor affecting the strength of the heat seal. If the temperature is too low, the adhesive layer and the bonding between the pvc film will not be strong. If the temperature is too high, it will make the medicine affected. Therefore, the reasonable heat sealing temperature is generally between 150 ℃ ~ 160 ℃.

　　5, heat sealing pressure - to achieve the ideal heat sealing strength, you need to set a certain heat sealing pressure. If the pressure is not enough, it can not make the anti-static aluminum foil bag product adhesive layer and pvc film fully adhesive heat sealing, so can not achieve a good heat sealing effect. So the national standard stipulates that the pressure of heat sealing is 0.20.2×10Pa.

　　6, heat sealing time - heat sealing time will also affect the heat sealing strength. In general, under the same heat sealing temperature and pressure, a longer heat sealing time can make the heat sealing part of the seal more firmly and perfectly. The desired sealing strength can be better achieved. If the heat sealing time is too short, it will make the adhesive layer and pvc film between the heat sealing is not sufficient. For this reason, the national standard provides a scientific heat sealing time of 1s.

　　7, the cooling process - heat sealing after the cooling process of anti-static aluminum foil bags should also pay attention to. Just melted heat-sealed weld at lower temperatures when molding, anti-static aluminum foil bag heat sealing strength may be reduced due to poor cooling, weld appearance will be affected, resulting in substandard products. Generally, poor cooling of anti-static aluminum foil pouches may be caused by insufficient heat sealing pressure, poor cooling water circulation, high water temperature or untimely cooling.

Therefore, the different packaging materials used in the production of anti-static aluminum foil pouches require different heat sealing parameters in actual production. It is too professional to understand! Never mind, Star teaches you 2 strokes, so that the anti-static aluminum foil pouches no longer cracked.

① Combined with the actual production needs and product packaging performance requirements, practical and reliable adjustment of heat sealing parameters. It should also be noted that, in different heat sealing pressure, time and temperature, the other can reach the standard heat sealing parameters are not the same, to be adjusted according to the actual situation, in order to ensure that the anti-static aluminum foil bag heat sealing strength and quality.


② anti-static aluminum foil bags need to accommodate the product will also affect the heat sealing strength of the aluminum foil bag. For example, if you use aluminum foil pouches to pack fine powder products, it is easy to stick to the seal of the anti-static aluminum foil pouches when loading. At this time, according to the packaged products, you need to reasonably adjust the thickness of the packaging material and the inner material of the anti-static aluminum foil pouches, in order to ensure and improve the heat sealing strength of the anti-static aluminum foil pouches.

Do you understand? If there are still questions, feel free to consult us ~ Star focuses on the packaging materials market for more than 20 years, only for your product escort.