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What are the uses of elevator sound-absorbing cotton?
What are the uses of elevator sound-absorbing cotton? Elevator sound-absorbing cotton density
product description
The elevator well sound-absorbing board is specially designed for elevator hoistway and engine room, and sound insulation material is produced. The core material is yellow glass wool fiber. Centrifugal glass wool is an acoustic material widely used in the world for a long time and has been proved to have excellent sound absorption. Performance, and excellent fire performance, its surface composite sound-absorbing particles. The main role is to enhance the sound absorption effect, and more convenient installation. The shape of the lift well sound-absorbing board is concave-convex. This special structure increases the effective sound absorption area and at the same time changes the sound reflection effect. The noise reduction coefficient is NRC=0.75. It is mainly applicable to elevator shafts, elevator machine rooms, and air-conditioning equipment rooms. Noise absorption and noise reduction in various types of specific structures. And it is non-toxic and harmless. It is a real green sound-absorbing decorative board.
Sound absorption principle
The acoustic fiber of elevator shaft sound-absorbing cotton is intertwined with fluffy fibers and there are a lot of tiny pores. It is a typical porous sound-absorbing material and has good sound-absorbing properties. Centrifugal glass wool can be made into wall panels, ceilings, space acoustic absorbers, etc., can absorb a large number of acoustic energy in the room, reduce reverberation time and reduce indoor noise.
Elevator sound-absorbing cotton is a porous sound-absorbing material with good sound absorption properties. The reason why centrifugal glass wool can absorb sound is not due to rough surface, but because it has a large number of tiny pores and holes that communicate with each other. When sound waves are incident on the centrifugal glass wool, sound waves can enter the interior of the material along the pores, causing vibration of the air molecules in the voids. Due to the viscous resistance of air and the friction between the air molecules and the pore walls, acoustic energy is converted into heat energy and lost.
The sound absorption performance of elevator sound-absorbing cotton also has a close relationship with installation conditions. When there is an air layer behind the elevator well sound-absorbing cotton board, the sound absorption effect of the sound-absorbing cotton elevator shaft with the same thickness and no air layer is similar. In particular, the sound absorption performance of medium and low frequencies will be greatly improved compared with the fact that the material is actually attached to the hard bottom surface. The sound absorption coefficient will increase with the increase of the thickness of the air layer, but the effect will not be obvious after increasing to a certain value. Glass wools with different bulk density are stacked together to form a gradually increasing bulk density and a greater sound absorption effect can be obtained. For example, a layer of 2.5cm thick 24kg/m3 cotton board and a layer of 2.5cm thick 32kg/m3 cotton board and sound absorption effect is better than a layer of 5cm thick 32kg/m3 cotton board. Usually in public spaces, gymnasiums, KTV halls, workshops and other large spaces, the main materials used for sound absorption of elevator shafts are used for sound absorption and noise reduction.
What are the uses of elevator sound-absorbing cotton? Elevator sound absorption cotton density sound absorption coefficient
Absorption coefficient of sound-absorbing board material, according to GB/T20247-2006 ISO 354:2003 "Acoustic Reverberation Chamber Sound Absorption Measurement"
Noise reduction coefficient: NRC = 0.85, and the absorption performance of the sound absorption structure is one grade. (NBR ≥ 0.85)
Frequency/HZ 100 125 160 200 250 315 400 500 630 a NBR
Sound absorption coefficient 0.38 0.48 0.51 0.84 0.86 0.82 0.92 0.87 0.80 0.77 0.85
Frequency/HZ 800 1000 1250 1600 2000 2500 3150 4000 5000 a NBR
Sound absorption coefficient 0.81 0.80 0.76 0.86 0.87 0.87 0.85 0.80 0.76 0.77 0.85
A1, the average sound absorption coefficient of 100-5000HZ.
A2, NBR is a noise reduction coefficient, which is the average value of the four octave absorption coefficients of 250, 500, 1000, 2000HZ.
Construction principle
The sound-absorbing board can be directly fixed with special staples when used in the elevator shaft. The installation is simple and the construction efficiency is very high. At the same time, the product can also be combined with other wall materials, sound insulation wall or sound insulation ceiling.
The main purpose
It is mainly applied to sound absorption and noise reduction processing in specific structures such as elevator shaft, elevator engine room, and air-conditioner room. And it is non-toxic and harmless. It is a real green sound-absorbing decorative board.
Features:
The fire rock wool raw materials use natural volcanic rocks and are non-combustible building material fireproof materials.
Main fire protection features:
With fire rating A1, it can effectively prevent the spread of fire.
The dimensions are very stable and do not stretch, shrink or deform during a fire.
High temperature, melting point higher than 1000 °C.
Does not produce smoke or burn droplets/fragments in a fire.
No harmful substances and gases are released during a fire.
heat insulation
Rock wool fibers are slender and flexible with low slag content. Therefore, the thermal conductivity is low, and it has an excellent thermal insulation effect.
Sound absorption and noise reduction
Rock wool is an ideal sound insulation material, and a large number of slender fibers form a porous connection structure, which determines that Shike Rockwool is an excellent sound absorption and noise reduction material.
Hydrophobic
The drooling rate of drowning rock wool products can reach 99.9%; the water absorption rate is extremely low and there is no capillary penetration.
Rock wool board technical characteristics:
1, good insulation properties, mechanical properties, fire performance.
2, high acidity coefficient, with better chemical stability and fiber durability.
3, with good sound absorption properties.
Rock wool board application:
Rock wool board is widely used in insulation of petroleum, chemical, metallurgy, textile and other industrial boilers and equipment pipelines. It is also used for insulation and sound absorption in partition walls, ceilings, and interior and exterior walls of the construction industry.
Fireproof rockwool raw materials are collected from natural rock and are non-combustible products. They do not produce toxic fumes or molten drips during fires. The application of a fire barrier in a building system can delay the spread of fire and secure valuable time for your personal safety and family property.
1. The rock wool board external wall insulation system is mainly made of water-repellent rock wool board produced by the pendulum method as the heat insulation and heat insulation layer material, and is fixed and fixed by a sticking and nail combining process to the base wall body and is made of a plastering glue. The Class-A non-combustible building energy-saving insulation system is composed of a screed layer and a decorative mortar finish layer or paint that is reinforced with glass fiber mesh cloth.
2. The system structure mainly includes: adhesive layer, insulation layer, wiping layer, decorative layer and accessories. Finishing layers should use lightweight functional coatings such as decorative mortars, decorative plasters or water-based exterior paints with good air permeability.
3. Rock wool board exterior insulation system, low thermal conductivity, good air permeability, high combustion performance level advantages, can be applied to energy-saving insulation projects in the new building, expansion, reconstruction of residential buildings and public buildings, including external walls Insulating, non-transparent curtain wall rock wool board is based on basalt and other natural ore as the main raw materials, rock wool board is melted into fiber by high temperature, adding appropriate amount of binder, curing process made.
Sound absorption and noise reduction
A large number of slender and flexible rock wool fibers form the numerous tiny air gaps of the multi-air-flow interconnect structure. The internal structure makes the rock wool have high physical properties such as sound absorption, noise reduction and elastic vibration elimination.
No corrosion
Rockwool insulation board Dalian rockwool composite board manufacturers infiltrate the liquid PH value is neutral or weak alkaline, no corrosion of carbon steel, aluminum alloy copper, stainless steel, cast iron and other metal equipment and building components
Health and Environmental Protection
Rock wool insulation board does not contain asbestos. It does not use CFCs or HCFCs, which are harmful to the environment, in the production process. It does not have a growing environment for microorganisms and does not breed mold.
Water resistant to moisture
Rockwool Insulation Board Hebei Rockwool Factory was exposed for 96 hours at a temperature of 50°C and a relative humidity of 95%. The volumetric water absorption was less than 0.2%. According to the national standard test quality, the moisture absorption rate was less than 1%. The water repellency rate was greater than 98%.
What are the uses of elevator sound-absorbing cotton? Elevator well sound-absorbing cotton density energy-saving
The best quality insulation material, rock wool can greatly improve the energy efficiency of the entire building and equipment, reduce the consumption of hot and cold medium more than 85%, not only save energy, but also reduce costs
The energy savings achieved through the use of rock wool as a heat insulation and insulation material can be easily and effectively reduced by Guangdong rock wool, and the energy production required for power supply is a direct and low-cost emission reduction that reduces the greenhouse gas emissions of the whole society. Outside the means. The use of high-quality, high-efficiency insulation in building and equipment insulation provides the most important emission reduction potential for the sustainable development of energy and the environment.
Rockwool insulation board is made of high-quality basalt and diabase as the main raw material to melt the basalt cloth. It adopts the internationally advanced four-roller centrifugal cotton making process to throw basalt cotton rock high-temperature melting solution into 4~7μm non-continuous fibers. Then add a certain amount of binder, dust-proof oil, and water-repellent agent into the rock wool fiber, and then make a series of products with different densities according to different purposes after settlement, discount, solidification, and cutting.
Application area
Construction Industry—Building Exterior Insulation Walls Curtain Walls Roofs and Enclosures Thermal Insulation Sound Absorption Noise Reduction
Petrochemical industry - insulation, sound insulation and noise reduction for equipment in petroleum, power and chemical industries
Industrial and Mining Industry—Industrial Kiln Ovens Large Diameter Tanks and Ships
Rock wool board is based on basalt and other natural minerals as the main raw materials, rock wool board is melted into fiber by high temperature, add appropriate amount of binder, curing process made. Rock wool board products are suitable for thermal insulation and sound insulation of industrial equipment, buildings and ships. In 2002, it introduced a high-tech automatic mineral wool plate production line with an annual output of 12,500 m3. Rock wool boards are widely used in ships, metallurgy, electric power, construction and other industries. This product is convenient for construction and installation, and has a significant energy saving effect. It has a high performance-to-price ratio. Marine and rock wool rock wool insulation boards are added with hydrophobic additives during production, which has good moisture resistance. Rock wool board for ships is used for thermal insulation and fire prevention of ships; water-wool rock wool boards are used in vehicles, mobile equipment, cold storage projects, air-conditioning ducts, thermal insulation and fire protection in wet environments, and applications where moisture resistance is a requirement. Rock wool board for construction has excellent fireproof, thermal insulation and sound-absorbing properties. It is mainly used for insulation and sound insulation of building walls and roofs; fire protection and noise reduction of building partitions, firewalls, fire doors and elevator shafts. It is suitable for insulation and heat insulation of pipelines in electric power, oil, metallurgy and shipbuilding industries, especially for the construction of small straight pipelines. Waterproof rock wool pipe has the special function of moisture-proof, heat-removal and water-repellent, especially suitable for use in rainy and humid environment, the moisture absorption rate is below 5%, and the water-repellent rate is over 98%. Marine rock wool insulation board and hydrophobic rock wool insulation board are added with hydrophobic additives during production, which has good moisture resistance. Rock wool board for ships is used for thermal insulation and fire prevention of ships; water-wool rock wool boards are used in vehicles, mobile equipment, cold storage projects, air-conditioning ducts, thermal insulation and fire protection in wet environments, and applications where moisture resistance is required.