建筑防排烟风管是建筑防排烟系统的重要组成部分。在火灾发生时，防烟风管输送和补充加压空气维持逃生通道和空间不受烟气的侵入；排烟风管及时排除火灾产生的大量烟气，以利于人员的转移和疏散。常见的做法是在镀锌钢板风管包覆绝热材料，以保证防排烟风管在火灾发生时能维持一定时间内的有效工作。

Building smoke exhaust ducts are an important component of building smoke exhaust systems. In the event of a fire, smoke ducts transport and supplement pressurized air to maintain escape routes and spaces from smoke intrusion; Smoke exhaust ducts should promptly eliminate a large amount of smoke generated by fires, in order to facilitate the transfer and evacuation of personnel. The common practice is to coat the galvanized steel sheet air duct with insulation material to ensure that the smoke exhaust duct can maintain effective operation for a certain period of time in the event of a fire.

玻璃棉是一种常见的绝热材料，广泛应用于建筑的保温和隔热。那么玻璃棉是否能适用于防排烟风管的耐火包覆呢？我们将从以下几个方面进行阐述：

Glass wool is a common insulation material widely used in building insulation and thermal insulation. Can glass wool be suitable for fire-resistant coating of smoke exhaust ducts? We will elaborate on the following aspects:

高温玻璃棉制品为可以用于高温工况（热面温度大于250摄氏度），且通过使用温度评估的玻璃棉制品。那么高温玻璃棉制品的使用温度到底是多少呢？笔者查询了全球几个知名的玻璃棉制造商官网，如欧文斯科宁0WENSCORNING、圣戈班伊索维尔SAINT-GOBAINISOVER、杰斯曼Johns Manvi11e等，其公布的耐高温绝热玻璃棉产品的使用温度均在300~500摄氏度：

High temperature glass wool products are glass wool products that can be used for high temperature conditions (hot surface temperature greater than 250 degrees Celsius) and have been evaluated by the highest operating temperature. So what is the maximum operating temperature for high-temperature glass wool products? The author searched the official websites of several well-known glass wool manufacturers around the world, such as Owens Corning 0WENSCORNNING, Saint Gobain Isavier SAINT-GOBAIRISOVER, and Jessman Johns Manvi11e. The maximum usage temperature of their high-temperature resistant insulation glass wool products is all between 300 and 500 degrees Celsius

玻璃棉材料及制品，为何其使用温度范围特别是耐高温性均在300~500摄氏度范围，很难突破呢？这是由于玻璃棉制品的材料构成和生产工艺所决定的。

Why is it difficult to break through the temperature range, especially the high temperature resistance, of glass wool materials and products in the range of 300-500 degrees Celsius? This is determined by the material composition and production process of glass wool products.

玻璃棉是将熔融玻璃纤维化并加以热固性树脂为主的粘结剂加工而成的制品，其主要成分为玻璃纤维。玻璃纤维本身是不燃的，且具备一定的耐高温性。

Glass wool is a product made by processing molten glass fibers with a thermosetting resin based binder, and its main component is glass fiber. Fiberglass itself is non combustible and has a certain degree of high temperature resistance.

但是玻璃纤维制成玻璃棉制品必须添加树脂类粘结剂，起到粘结玻璃纤维和维持结构支撑的作用。在遇到高温（通常为200~300摄氏度）时，树脂类粘结剂即会炭化和熔解，玻璃棉就会失去结构支撑，这就是玻璃棉无法耐受500摄氏度以上高温的关键因素。

However, when glass fiber is used to make glass wool products, resin adhesives must be added to bond the glass fiber and maintain structural support. When encountering high temperatures (usually 200-300 degrees Celsius), resin adhesives will carbonize and melt, and glass wool will lose structural support. This is the key factor that glass wool cannot withstand high temperatures above 500 degrees Celsius.

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