Tea is a very popular drink in the world, and when you buy tea in the market, it is usually put in a small bag. When you drink it, you just put the tea bag into a cup and add hot water. And because the tea bags are tightly sealed, they don't leak out. but do you know how to seal tea bags?

 

Normally, people seal tea bags with a heat seal, but the pyramid tea bag packaging machine uses an ultrasonic seal. but how to seal tea bags by ultrasonic?

Ultrasonic seal, only in the sealing layer will produce the heat required to melt, locally, the vibration is locally converted into friction heat energy to complete the sealing. When sealing, heat is generated inside the film, rather than being introduced from the outside. Molds in direct contact with packaging materials are kept at room temperature during sealing. The support layer is almost kept at room temperature. After the energy input, due to the temperature difference between the support layer and the sealing layer, the heat energy can also be transmitted out smoothly. The sealing strength is higher. So even tea bags soaked in very hot water will not break.

In addition to ultrasonic sealing another commonly used sealing method is vacuum sealing, but how to vaccum seal tea bags? The vacuum seal is mainly realized by the vacuum sealer, complete sealing while vacuuming. This can remove oxygen, moisture, and high temperature fermentation to help prevent tea from deteriorating.

 

There are many ways to seal tea bags, if you have a novel way, please share with us.