Stubborn bubbles that are hard to eliminate may appear during adhesive defoaming and bring troubles to production. To better understand and solve this issue, we need to analyze the possible causes of residual stubborn bubbles.

1. Material Properties of Adhesive

Possible cause: The inherent characteristics of adhesive are the main source of bubble trouble. For example, high-viscosity adhesives or glues with special components tend to form stubborn bubbles that are difficult to remove.

Solution: First, verify whether your adhesive formula is compatible with the selected defoaming machine. Sometimes formula adjustment is required to improve fluidity and defoaming performance.

2. Defoaming Machine Design

Possible cause: Improper machine design or incompatibility with your adhesive leads to poor bubble removal. Insufficient planetary mixing defoaming capability or inadequate centrifugal force will result in incomplete degassing.

Solution: Consider upgrading equipment and select models suitable for high-viscosity or special adhesives. Confirm the machine design and performance match your adhesive processing requirements.

3. Improper Parameter Setting

Possible cause: Incorrect parameters set by operators, such as mixing speed, vacuum degree and temperature, will affect defoaming results.

Solution: Provide operator training to ensure correct parameter configuration. Tune parameters according to adhesive features to optimize defoaming performance.

4. Fast Curing Speed of Adhesive

Possible cause: Some adhesives cure rapidly during defoaming, locking bubbles inside the colloid before they can escape fully.

Solution: Adjust curing time or choose adhesive formulas with slower curing speed. Reserve sufficient time for bubble release before curing.

5. Temperature Control Issues

Possible cause: Improper temperature control (too high or too low) hinders bubble separation during defoaming.

Solution: Monitor and adjust the temperature control system carefully, keeping adhesive within the proper temperature range to facilitate bubble escape.

To tackle stubborn bubbles, comprehensively analyze adhesive properties, machine design, operation parameters, curing rate and temperature control. Identify root causes and apply targeted solutions to improve defoaming quality and guarantee smooth production.