Törmäyslasien

Törmäyslasien, also known as safety glass or laminated glass in English, is a type of glass designed to break in a predictable and relatively safe manner. It consists of two or more layers of glass bonded together with a plastic interlayer, typically polyvinyl butyral (PVB). When subjected to impact, the glass layers may crack, but the PVB interlayer holds the fragments together, preventing them from scattering dangerously. This makes törmäyslasien significantly safer than ordinary annealed glass, which shatters into sharp shards.

The primary application of törmäyslasien is in situations where occupant safety is paramount. This includes automotive windshields, where it prevents the driver and passengers from being ejected and protects them from external objects during a collision. It is also widely used in architectural applications such as skylights, glass doors, and shop windows, as well as in protective barriers and display cases. The interlayer also provides some degree of sound insulation and UV filtering.

The manufacturing process involves heating and pressing multiple layers of glass and the PVB interlayer together under controlled conditions. The thickness of the glass and the interlayer can be varied to achieve different levels of strength, impact resistance, and security. Törmäyslasien is also a key component in bullet-resistant glass, where multiple layers of thicker glass and stronger interlayers are used to stop projectiles. Its ability to contain breakage makes it a crucial safety material across various industries.