When using an induction sealing machine, insufficient temperature of the sealing film can lead to weak sealing, easy peeling, or complete failure. This is usually not a problem with a single component, but a reflection of the overall system compatibility. The following are the main investigation directions: 

Core principle review: 

The sealing of the sealing film (induction sealing film) relies on the instantaneous generation of eddy current heating by its aluminum foil layer in the high-frequency electromagnetic field generated by the sensor. Any problem at any stage may cause the temperature to not rise. 

I、 Machine parameter issues (most common) 

1. Low power setting: This is the most direct reason. Power determines the energy intensity of the electromagnetic field. Solution: Increase the output power of the induction sealing machine appropriately. 

2. Short sealing time: The machine has been powered on for too short, resulting in insufficient heat accumulation. Solution: Increase the sealing time appropriately. 

3. Frequency mismatch: The oscillation frequency of the device does not match the characteristics of the sealing film and aluminum foil, which affects the heating efficiency. 

II、 The problem with the sealing film itself 

1. Aluminum foil layer is too thin or the material is poor: Aluminum foil is a heating element, and if its thickness or purity is not sufficient, the resistance will not match, and the heat generation will significantly decrease. 

2. High melting point of heat sealing layer: If the melting point of the heat sealing adhesive of the sealing film is too high, it is difficult to reach its melting temperature under conventional power and time. 

Countermeasure: Confirm the specifications of the sealing film with the supplier to ensure that its aluminum foil thickness, resistance value, and heat sealing layer material match your machine and bottle material. 

III、 Packaging container issue 

1. Bottle mouth material: Induction heating mainly acts on aluminum foil, but heat will be conducted to the bottle mouth. If the bottle mouth (especially HDPE and other materials) is too thick or has poor thermal conductivity, it will "absorb" a large amount of heat, causing the actual temperature of the sealing film to not rise. 

2. Moisture or contamination at the bottle mouth: Unclean bottle mouth can affect heat conduction and bonding effectiveness. 

IV、 Equipment hardware malfunction 

1. Induction coil problem: Aging, loosening, or excessive distance from the bottle mouth (air gap) can cause a decrease in magnetic field strength and greatly reduce heating efficiency. 

2. Aging of machine components: The performance of core components such as capacitors and IGBT power transistors deteriorates, resulting in insufficient output power. 

Summary of troubleshooting steps: 

Priority adjustment: Firstly, increase the power and sealing time slightly on the existing basis. 

Material replacement testing: Use another batch of confirmed good sealing film and bottles for testing to quickly determine whether it is a machine problem or a consumable problem. 

Final inspection: If the above is invalid, please contact the equipment manufacturer to check the induction coil and internal circuit. 

Remember, a stable sealing effect requires a perfect combination of equipment, sealing film, and container. 

Leadtra Packaging focuses on the research and development of aluminum foil sealing film. Its sealing film has an exquisite appearance, bright colors, tight sealing, and easy to tear effect. If you are interested in or have any questions about us, please feel free to call us for consultation.