Fire-retardant window is made of pre-stressed glass with high temperature melting point

摘要

A fire-retardant window conforming to German industrial standard DIN EN 357 consists of a one-piece window pane (2) that is physically or chemically pre-stressed and located within a surrounding frame (1). The glass softening point (log ( = 7.6) is above the melting point of 875[deg] C. The bending tensile strength is above 100 N/mm(2 and the modulus of elasticity is above 75,000 N/mm(2.