What is the difference between E1 and E4 on car glass?

[VanChristian]

E1 represents production in Germany, while E4 represents production in the Netherlands. Below is a relevant introduction to car glass: 1. Function of glass: Car glass is an essential component among vehicle body attachments, primarily serving a protective role. Currently, car glass mainly consists of laminated tempered glass and laminated zoned tempered glass, which can withstand strong impacts. Laminated glass refers to a type of glass where a transparent adhesive plastic film is placed between two or three layers of glass, combining the toughness of the plastic with the hardness of the glass, thereby enhancing the glass's resistance to shattering. Even if the glass breaks due to a strong impact, it will not scatter sharp fragments, preventing personal injury. 2. Tempered glass: Tempered glass is made by quenching ordinary glass to create certain internal stresses, thereby strengthening the glass. When it breaks upon impact, it splits into small, blunt-edged pieces, reducing the risk of injury to passengers. Zoned tempered glass is a new type of tempered glass that undergoes special treatment, allowing it to maintain some clarity in its cracks when shattered, ensuring the driver's field of vision remains unaffected.