EPiC database - Laminated glass

This material is part of the free Environmental Performance in Construction (EPiC) Database. The EPiC Database contains embodied environmental flow coefficients for 250+ construction materials using a comprehensive hybrid life cycle inventory approach.Laminated glass is a composite safety glass, made by combing two or more sheets of flat glass with a plastic, or polyvinyl butyral (PVB) interlayer (usually 0.38 mm thick). The layers are bonded together using heat and pressure.Flat glass is made from a combination of silica, soda, lime, dolomite and aluminium oxide. The raw materials are melted at high temperature and the molten glass is then formed into flat glass using a variety of processes. A floating process, where the molten glass is floated on a bed of tin, is most common for manufacturing window glass. The glass is then gradually cooled (annealed) and cut to size. Laminated glass is commonly used for windows, glass doors and transparent walls, where there is an increased chance of damage, as when broken, the glass remains intact, held together by the PVB layer. It provides added safety, security, thermal and acoustic properties over flat glass. The glass comes in a range of thicknesses, starting from 6.38 mm.

该材料是免费环境性能建设（EPiC）数据库的一部分。EPiC数据库包含250多种建筑材料的环境流系数，这些系数采用了综合的混合生命周期库存方法进行计算。夹层玻璃是一种复合安全玻璃，通过将两片或更多平片玻璃与塑料或聚乙烯丁酸酯（PVB）中间层（通常厚度为0.38毫米）结合而成。这些层通过加热和压力的方式粘合在一起。平板玻璃由二氧化硅、苏打、石灰、白云石和氧化铝的混合物制成。这些原材料在高温下熔化，随后通过多种工艺将熔融玻璃制成平板玻璃。浮法工艺，即熔融玻璃在锡床上漂浮，是制造窗户玻璃最常见的方法。随后，玻璃会逐渐冷却（退火）并切割至所需尺寸。夹层玻璃常用于窗户、玻璃门和透明墙体，这些地方更容易遭受损坏，因为当玻璃破碎时，玻璃仍然保持完整，由PVB层将其保持在一起。与平板玻璃相比，夹层玻璃提供了额外的安全性、安全性、保温性和隔音性能。玻璃的厚度有多种选择，从6.38毫米起。