What is the difference between rock wool and glass wool?
2021-01-27       Source:尤特森保温材料

What is the difference between rock wool and glass wool?  The difference between the glass wool and rock wool, the first is the use of raw materials, glass cotton main material is glass, after high temperature melting, again through the centrifugal fibre technology, made of glass wool products, but the main material is basalt rock wool, glass wool, dense than glass cotton high temperature resistant, rock wool used for fireproof insulation material, the glass wool is more used for thermal insulation sound-absorbing material.  


The difference in production process, glass wool belongs to a kind of artificial inorganic fiber, using quartz sand, limestone, dolomite and other natural ores as the main raw materials, with some soda, borax and other chemical raw materials melting into glass.  In the melting state, with the help of external blowing type cast into flocculent fine fiber, fiber and fiber for three-dimensional cross, intertwined together, showing a lot of small gaps.  This gap can be regarded as a pore, therefore, glass wool can be regarded as a porous material, with good thermal insulation, sound absorption performance.  


Rock wool is fine basalt as the main raw material, after high temperature melting, made of inorganic fiber by high-speed centrifugal equipment, and then add special binder and dustproof oil by swinging with felt and through special equipment to change the fiber arrangement structure, and finally made of new light heat preservation material.  


The difference in production performance, glass wool than rock wool bulk density is low, slag ball content is less, low thermal conductivity, long service life, fiber toughness, but the use temperature of rock wool can reach 600℃, glass wool only about 260℃.  


The difference between product uses, glass wool is generally used for heat preservation parts less than 200℃, mostly used for the heat preservation of general buildings or low-temperature pipelines, rock wool is generally used for heat preservation parts at 500℃, mostly used for heat preservation of high-temperature thermal pipelines or power equipment.  


Product acoustic difference, glass wool fiber is relatively long and thin, compact and uniform distribution, in general, glass wool is stronger and not so easy to loose, but this is also relatively speaking.  Compared with glass wool, the fiber of rock wool is relatively thick and short.  Rock wool and glass wool in the same density, thickness of the case, just installed in the KTV room sound insulation decoration, glass wool material of sound absorption, sound insulation effect, is about 1.2 times rock wool, which can be seen the difference between the two.  But in general, rock wool is more suitable for sound insulation materials, glass wool is more suitable for sound absorption materials.