Sealing method and airtightness inspection method for vacuum packaging bags

Vacuum packaging bag is a packaging method that involves adding products into an airtight packaging bag, removing the air inside the bag, and achieving a predetermined vacuum level in the sealed bag. The sealing of vacuum packaging bags is an important link related to the airtightness of vacuum packaging bags and is the key to the success of packaging. Next, Jinde Packaging will share with you in detail the sealing method and airtightness inspection method of vacuum packaging bags.
What are the sealing methods for vacuum packaging bags? The common sealing methods for vacuum packaging bags are as follows:
1. Heat sealing: Heating is a commonly used method to melt and bond the sealing material of the packaging bag together.
2. Pulse sealing: Using instantaneous high current pulses to generate heat for sealing.
3. Ultrasonic sealing: Utilizing the vibration energy of ultrasonic waves to fuse the sealing area.
4. Adhesive sealing: Use a specific adhesive to bond and seal the sealing area.
 
How to determine if the vacuum packaging bag is leaking? Here are some methods to determine if a vacuum packaging bag is leaking air:
1. Observe the appearance: Check if the bag has obvious swelling or deformation. If the bag, which should have been flat after vacuuming, becomes swollen, it may be due to air leakage.
2. Touch sensation: Gently touch the surface of the bag with your hand. If there are signs of gas entering or the bag becomes relatively soft, there may be air leakage.
3. Listen to the sound: Gently squeeze the bag and listen for the sound of gas leakage.
4. Immersion test: The bag can be partially immersed in water to observe if any bubbles emerge. If there are bubbles, there may be air leakage.
5. Odor assessment: If the items inside the bag have a special odor that should not be emitted under normal circumstances, it may be due to air leakage causing external air to enter.
The above methods for sealing and air tightness inspection of vacuum packaging bags are organized by Jinde Packaging. Jinde Packaging is a vacuum packaging bag manufacturer with 11 years of industry production experience. Jinde Packaging uses biaxially stretched vacuum packaging bags with inner PE and metallocene nylon film processing, which have good material toughness and are not easy to leak during vacuum pumping. Having SGS environmental testing report and third-party testing certificate, it meets the requirements of food packaging quality and safety. Since its establishment, the factory has won multiple honors such as FDA certification, ISO certification, SGS certification, and MA product certification. Jinde Packaging has its own import and export rights for vacuum packaging bags, exporting to Europe, America, Africa, and Southeast Asian countries. Jinde Packaging is an old brand of vacuum packaging bags, worthy of your trust! Service Hotline: 15902743510