This situation is mainly caused by the following two reasons.

First, the storage temperature is too low: if the acid glue (especially low-grade glue) is stored at a lower temperature, a lot of bubbles will form. The reason may be that after storage at low temperature, the liquid raw material will form a lot of bubbles due to the change in the volume of cold shrinkage. Therefore, it is recommended that the storage temperature be not lower than 0 ° C.

The second is formed during the canning process: In normal canning, there will often be a small amount of small air bubbles in the tail of the rubber pack. Impact: If there are many bubbles or interrupted flow (large bubbles), it is caused by improper operation, which must be improved and should be avoided as much as possible. However, this situation also has a probability problem. If it is rare or occasional, it should be regarded as an accident. Try to avoid large bubbles during operation.