In 1911, he formed the Société du Verre Triplex, which fabricated a glass-plastic composite to reduce injuries in car accidents. In 1909 Bénédictus filed a patent, after hearing about a car accident where two women were severely injured by glass debris. Laminated glass was invented in 1903 by the French chemist Édouard Bénédictus (1878–1930), inspired by a laboratory accident: a glass flask had become coated with the plastic cellulose nitrate, and when dropped it shattered but did not break into pieces. In 1902, the French Le Carbone corporation obtained a patent for coating glass objects with celluloid to render them less susceptible to cracking or breaking. įirefighters breaking through a laminated windshield A thermoset EVA, for example, can block up to 99.9% of all UV rays. An additional property of laminated glass for windows is that an adequate TPU, PVB or EVA interlayer can block nearly all ultraviolet radiation. TPU is an elastic material, so sound absorption is intrinsic to its nature. In the case of the EVA material, no additional acoustic material is required, since the EVA provides sound insulation. For this purpose a special "acoustic PVB" compound is used for the interlayer. Laminated glass is also used to increase the sound insulation rating of a window, because it significantly improves sound attenuation compared to monolithic glass panes of the same thickness. In geographical areas requiring hurricane-resistant construction, laminated glass is often used in exterior storefronts, curtain walls, and windows. The most common use of laminated glass is skylight glazing and automobile windshields. Laminated glass is used for architecture, glazing, automobile safety, photovoltaic, UV protection, and artistic expression. The thermoset EVA offers a complete bonding (cross-linking) with the material whether it is glass, polycarbonate (PC), or other types of products. This produces a characteristic "spider web" cracking pattern when the impact is not enough to completely pierce the glass. The interlayer, made through heat and pressure, keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. In the event of breaking, it is held in place by a thin polymer interlayer, typically of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), lonoplast polymers, cast in place (CIP) liquid resin, or thermoplastic polyurethane (TPU), between its two or more layers of glass. Laminated glass (LG) is a type of safety glass that holds together when shattered. Automobile windshield with "spider web" cracking typical of laminated safety glass.
0 Comments
Leave a Reply. |