Case Study: Bubbles of Laminated Glass with EVA Film Interlayer

Case Study: Bubbles of Laminated Glass with EVA Film Interlayer

By Peter Shin

We have seen a situation in this way: Bubbles comes out in the Laminated Glass. And we checks all the details of vacuuming and vacuuming is definitely no problem.

But the bubbles still comes out in the laminated glass. And the bubbles are regular and on lines.

Finally we realized that the bubble lines are right upon the heating pipes.

So we reduced the temperatures and did the test. Then no bubbles comes out, but some part of laminated glass is not very transparent.

So we know the reason:

Because the heating pipes are under silicon bag, when laminating glass, the part of laminated glass right upon the heating pipes are in higher temperature. And the temperature inside the oven is not in average.

Remember that when the temperature is too high, the copolymer will be breaking up and produce gas which would cause bubbles inside laminated glass.

So we suggest you using the wind-cycle-heating laminating machine to make sure the temperature inside oven is in average.

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