As shown in the cross-sectional view of laminated safety glass, the windshield usually has a certain curvature, so it is easy to distinguish the inside from the outside. A layer of PVB transparent film is sandwiched between the two layers of glass, which is the pink part in the picture.

Windshield, as its name implies, is a glass used to shield passengers from wind and sand. It is said that the first laminated safety windshield was invented by Ford. The earliest windshield was cut by hand with flat glass and then placed in front of the car. In the mid-1920s, Henry Ford was slightly injured by a broken windshield, which prompted Ford to invent laminated safety glass. Laminated glass is a transparent and sticky plastic film stuck between two or three layers of glass. It combines the strength and toughness of plastic with the hardness of glass, which not only increases the shatter resistance of glass, but also prevents glass fragments from scattering and hurting people. Laminated glass is the most widely used and common windshield at present.