Reasons for the drop resistance of laminated glass

1. The bond strength between glass and film is too high, and the bond strength and impact resistance are inversely proportional to a certain range.

2. The change in film thickness, the thinner interlayer results in lower impact resistance, and whether the film is thinned or changed.

3, the thickness of the glass changes, the thicker glass has lower impact resistance.

4. There are differences in the brand and model of the film used for the interlayer, resulting in a decrease in the impact resistance of the laminated glass.

5. Changes in impact test conditions, such as test frame, temperature or procedure, inaccurate test sample size, etc.

Approach

1. The impact resistance of laminated glass is related to the bond strength of the product, so it is necessary to check the adhesion strength of the laminated glass. If the bond strength of the product is not within the specified range, determine the cause of the change in bond strength and take action. The low water permeability of the film can increase the bond strength, but the impact resistance of the laminated glass is lowered, and the moisture content of the film is controlled within a prescribed range.

2. Measure the thickness of the laminated glass: measure the total thickness of the laminated glass, the thickness of the glass, the thickness of the film, and check whether the film is thin or not. The test piece should have the same glass and film thickness as the product produced.

3. Check the type of laminated glass, check whether the film brand and model are correct, the performance and use of different films are different, and the impact resistance is different; the different varieties of glass will also cause different impact resistance; measuring samples and glass The variety should be the same.

4. When the production and material inspections are correct, check the conditions and records of the impact specimens. For example, the temperature of the specimens will be significantly reduced at low or high temperatures. Observing the test frame, the conditions of the frame will affect the test results. Whether the edges are worn, cracked, or wrong in size.