Glass wool is made of glass and quartz sand as the main raw materials, mixed with various additives in a certain proportion, and melted into a glass solution in the melting cellar. The glass solution forms a stable liquid flow through the forehearth platinum drain plate, and then flows the spinning machine reaches the high-speed rotating centrifuge with small holes on the side wall. Under the action of centrifugal force, the glass solution is thrown into primary fibers. Afterwards, under the action of the mixed gas jetted at high speed, the primary fiber is drawn into glass fiber. While the glass fiber is dropped on the cotton mesh belt, the binder and water-repellent agent are sprayed, and then compacted, solidified, and crossed. Cut and slit to form products of certain specifications, and according to customer requirements, composite moisture-proof protective layer on the production line, and finally compress and pack, pack and store.
Glass wool · Thermal insulation The glass wool slag ball content is low, and the uniform slender fiber is cross-distributed, which greatly reduces the thermal conductivity of the product and has excellent thermal insulation performance.
The slag ball content in the glass wool of the centrifugal process is less than 0.3%, and the average diameter of the glass fiber has two levels of ≤5μm and ≤8μm, and the corresponding thermal conductivity is also different. Glass wool, sound absorption and noise reduction There are a large number of tiny pores inside glass wool, which is a typical porous sound-absorbing material with good sound-absorbing properties. Acoustic energy enters the material along the pores, causing the vibration of air molecules in the pores. Due to the viscous resistance of air and the friction between air molecules and the pore walls, the sound energy is converted into heat and is lost. Air flow resistance is an important factor affecting the sound absorption performance of glass wool. If the flow resistance is too small, it means that the material is sparse, and air vibration is easy to pass through, and the sound absorption performance is reduced; if the flow resistance is too large, it means that the material is dense, the air vibration is difficult to pass in, and the sound absorption performance is also reduced.
Glass wool · Class A fireproof In the current standard, the fire protection of building insulation materials is divided into 4 levels: Class A (non-flammable), Class B1 (flammable), Class B2 (flammable), and Class B3 (flammable). Glass wool is an inorganic non-combustible material, and its fire resistance reaches Class A.
Glass wool · High temperature stability Thermal load shrinkage temperature refers to the temperature at which the thickness shrinks by 10% when heated under a certain load. At this temperature, the size, mechanical properties and thermal properties of the material do not change beyond the allowable range, that is, the highest temperature that can be used in normal use. Due to the different shape and density of glass wool, the heat load shrinkage temperature will be different. For example, when the glass wool board has a diameter of 8μm and a density of 24kg/m³, the thermal load shrinkage temperature is ≥250℃; when the glass wool board has a density of 64kg/m³, the thermal load shrinkage temperature can reach ≥400℃. The value of this parameter will also be different for products of different forms such as glass wool felt, glass wool tape, glass wool blanket, and glass wool tube shell.
Glass wool · Hydrophobic treatment Fiber insulation materials, such as glass wool products and mineral rock wool products, are basically non-hydrophobic, but after water-repellent treatment, their water-repellent rate can reach more than 90% or even higher. At present, the modified silicone water repellent is a more general water repellent. Its hydrophobic principle is to use the strong chemical affinity between the organic silicon compound and the inorganic silicate material to effectively change the silicate material. Surface characteristics, the water repellency rate can reach 98% and above.
Glass wool · Specification selection In the national standard, the thickness of the glass wool board is 25-100mm and the density is 24-120kg/m³. The thickness specification span of glass wool felt is the same as that of glass wool board, the density will be smaller, there are several specifications such as 10-48 kg/m³.
The choice of glass wool thickness and density mainly depends on the thermal resistance of the material and the sound absorption performance. For example, the roof thermal resistance in cold areas requires 1.82. You can choose thermal insulation cotton with a thickness of 100mm and a density of 12kg/m³, as long as the thermal resistance can meet the standard.
In terms of sound absorption performance, the thickness of glass wool remains unchanged, the bulk density is increased, and the sound absorption effect is enhanced. But when the bulk density increases to a certain extent, the material becomes dense, the flow resistance is greater than the optimal flow resistance, and the sound absorption effect decreases instead. For example, for glass wool with a thickness of 50mm and a bulk density of 16kg/m³, the sound absorption coefficient of medium and high frequency (>500Hz) is already close to 1. When the bulk density is close to 110kg/m³, the sound absorption performance reaches the maximum, and when the bulk density exceeds 120kg/m³ When the sound absorption performance is reduced.
Glass wool, safe and environmentally friendly Glass wool is an inorganic thermal insulation material made of glass and quartz sand as the main raw materials. Construction waste can be recycled and is a green building material product. Traditional glass wool products use phenolic resin as the main binder, inevitably there will be free formaldehyde, phenol and other harmful substances in the glass wool, but its formaldehyde content meets the current domestic standards and can be used with confidence. Glass wool · Application
1 Glass wool for steel structure Glass wool for steel structure can be widely used in the thermal insulation system of large public buildings such as industrial plants, logistics warehouses, and large supermarkets, convention and exhibition centers, airports, stadiums and other large public buildings.
2 Glass wool for curtain wall Water-repellent glass wool panels for curtain walls are widely used in the insulation of large commercial buildings, office buildings, hotels, stadiums, airport terminals and other building curtain walls.
3 Hard glass wool Composite hard glass wool uses vertical fiber glass wool board (straight-laid thermal insulation material) as the main thermal insulation material, and a composite thermal insulation material formed by compounding high-hardness, crack-resistant, and impact-resistant structural fireproof panels. It is widely used in various flexible waterproof roof construction systems and old structural roof maintenance and other fields.
4 Glass wool for sound insulation Glass wool for sound insulation is widely used in indoor partitions, central air conditioning, entertainment venues (KTV, theaters, etc.) and equipment (computers, air compressors, etc.) sound absorption treatment and general building sound absorption and noise reduction.
5 HVAC glass wool Glass wool felt is an economical material with light weight, softness, high tensile strength and strong maneuverability. Glass wool board has the characteristics of strong material, smooth surface and strong pressure resistance. After the glass wool felt and glass wool board products are compounded with the corresponding veneer materials, they can be used as the insulating layer wrapping material on the outer wall of the air duct, or installed on the inner wall of the air duct as a sound-absorbing lining, which can effectively control the heat transfer through the air duct wall. Reduce the cold and heat loss of the air in the pipeline during operation. At the same time, it can also greatly eliminate the noise transmission of the air duct.
6 Glass wool for sandwich panels Glass wool for sandwich panels can be widely used in industrial plants, warehouses, cold storage, box packaging, light steel housing, original building mezzanine rooms, movable board rooms, various clean rooms, air-conditioning rooms, etc.
7 High temperature glass wool It can be widely used in electric power, petroleum, chemical, light industry, metallurgy and other industries as well as boilers, reactors, tanks, pipelines and other higher temperature equipment for heat preservation, heat insulation and noise reduction. The outer protective layer of the thermal insulation structure can be made of tin, aluminum, stainless steel or plastering materials according to the specific conditions.
Reviews Glass wool is cost-effective and is the mainstream thermal insulation material in the light steel housing industry, but it is far more than simply used in building thermal insulation, and has a broader application field. Due to different materials and processes, the quality of domestic products varies, so you must first understand their characteristics when purchasing. Choose big brands, big manufacturers and have rigorously inspected products, you will be more secure! In addition, the production area of glass wool is relatively concentrated, and the cost of purchasing and shipping is relatively high. The freight is often more expensive than the goods. Please plan the purchase volume reasonably.
