What are the Characters of Laminated Glass?

Tempered glass is another type of safety glass that is strengthened by heat-treating and cooling the entire glass to make it stronger and more resistant to breakage. It differs significantly from laminated glass as tempered glass does not provide shatterproof performance when glass gets broken.

Window films are also used to prevent shattering of glass. However, they need to be replaced when their function deteriorates due to ultraviolet rays, temperatures, condensation, and other factors.

Laminated glass has a PVB interlayer between two glass panes, which prevents shards of glass from shattering on impact and provides high penetrating resistance, making it useful for automobile and building safety and crime prevention. Since these functions are inside the glass, unlike window films, it has high durability.

Using laminated glass for windshields where safety and security are required is mandatory in almost all countries, such as the U.S., Europe and Japan.

Laminated glass not only enhances automotive safety, but its applications are expanding beyond windshields to include side door glass and panoramic roofs, as it is required to provide a variety of functions such as UV blocking, visible light control, solar control, sound acoustic, and switchable.

The role of laminated glass is expanding in terms of comfort and design.

A typical PVB laminated glass production process is as follows. Two sheets of glass are cut to size and laminated with a PVB interlayer between them. The glass and interlayer are temporarily laminated by applying heat and de-airing. Next, the glass is placed in an autoclave, where high temperature and pressure are applied to bond the glass and PVB interlayer completely.

The glass and PVB interlayer are then formed as one piece of glass, resulting in a laminated glass product that is more shatterproof and has superior penetration resistance than a single sheet of glass.