After filling the syringe with glue, there may be air bubbles in the syringe. Air bubbles will cause uneven glue during sizing, dripping glue at the outlet of the syringe, etc. In order to prevent these situations, there are several methods to eliminate air bubbles:

• For medium and low viscosity fluids, tilt the syringe at a certain angle

During the filling process, do not place the syringe vertically, tilt the syringe at a certain angle, and adjust the filling speed to prevent the formation of air bubbles, and the syringe is filled to 2/3 at most during filling.

If air bubbles still appear, use the syringe plunger to expel the air bubbles. To do this, hold the syringe with the tip pointing up, then tap the syringe so the air bubbles will rise to the top. Then remove the tip cap and slowly push the plunger up to remove air bubbles.

• For high viscosity fluid, centrifuge can be used

The air bubbles in the high-viscosity fluid are not easy to discharge after being filled into the syringe. The best solution is to discharge the air bubbles in the fluid before filling. At this time, a centrifuge is required to remove the air bubbles.

For the high-viscosity fluid that has been filled into the syringe, you can also adopt the method of using the push rod to squeeze out the air bubbles, but you need to put the syringe upside down and let it stand for a while, wait for the bubbles to slowly rise to the top, and then push the push rod to discharge the air bubbles.

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