Solution to Bubble in Laminator Pressing
Analysis on the problem of air bubbles during lamination of the laminator:
A. Large area bubbles caused by vacuum pump failure or power failure during vacuum pumping. This type of bubble needs to contact equipment maintenance and the company's external power information.
B. Bubbles caused by foreign matters. Generally, foreign matters with humidity reaching a certain value will cause bubbles, which requires the control of the previous process.
C. For the bubbles caused by the insolubility of EVA caused by high temperature, this type of bubble can take cooling measures to ensure the viscosity of the adhesive (in fact, if the viscosity of the adhesive is removed, all bubbles can basically be solved by cooling, except for large area bubbles). In addition, increasing the pressure and increasing the inflation rate is also a good way to solve the bubbles.
D. Bubbles caused by liquid. At present, most of the bubbles we commonly contact are caused by flux and alcohol.
E. In addition, repeated lamination (mostly due to rework, and mostly near the interconnection bar and bus bar) will also generate bubbles (EVA generates new gas through complex physical and chemical reactions).