In order to get well sealed edge, the air between the film and the glass needs to be pressed out. As normal, there are two methods below:

a. Rolling De-airing

The pre-laminated glass to heat up to 25-40°C on glass surface and put it into the first roll by the space of roll is 1mm less than the thickness of laminated glass with pressure in 0.2-0.5 MPa. And also enter into thermostatic container to heat up to 60-80°C. Then through the second roll by the space of roll is 2mm less than the thickness of laminated glass with pressure in 0.3-0.5 MPa. After finishing to second roll, seal the four sides of laminated glass with clear tape to avoid bubbles.

b. Vacuum De-airing

Put the pre-laminated glass into a vacuum bag or vacuum rubber gasket, then use the cool or heat pumping to expel the air. Recommend: the decompression vacuum degree is exceed 650 mmHg. For the cool pumping temperature should be lower than 25°C and keep it for 30-40 mins; while in the period of heat pumping, the temperature should be 70-120°C and keep it for 30-60 mins.

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