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  The most commonly used and least expensive structure is the suspended ceiling of perforated plasterboard or the wall made of the perforated board filled with centrifugal   glass wool . When the perforation rate is greater than 20%, the sound absorption performance of centrifugal glass wool can basically be fully utilized. In order to prevent glass wool fibers from spilling, it is necessary to attach a layer of non-woven fabric, mulberry paper, and other sound-permeable fabrics behind the perforated plate, or use glass cloth, plastic film, etc. to wrap the glass wool. Panels similar to perforated gypsum board include perforated metal panels (such as aluminum panels), perforated wooden boards, perforated fiber cement boards, perforated mineral wool boards, etc. The glass wool board can be made into a sound-absorbing ceiling board or sound-absorbing wallboard after treatment. Generally, it is common to use glue curing around 80-120kg/m3 of glass wool board and outsourcing fireproof soun

  The sound absorption performance of centrifugal   glass wool  is also closely related to the installation conditions. When there is an air layer behind the glass wool board, the sound absorption effect is similar to that of a glass wool board with the same thickness without an air layer. In particular, the sound absorption performance of medium and low frequency will be greatly improved than the material is 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. Using glass wool of different bulk density is stacked together to form a form of gradually increasing bulk density, which can obtain a greater sound absorption effect. For example, stacking a 2.5cm thick 24kg/m3 cotton board with a 2.5cm thick 32kg/m3 cotton board will have better sound absorption than a 5cm thick 32kg/m3 cotton board. The 24kg/m3 glass wool board is made int

  Centrifugal glass wool   is a porous sound-absorbing material with good sound-absorbing performance. The reason why centrifugal glass wool can absorb sound is not because of the rough surface, but because it has a large number of tiny pores and pores connected inside and outside. When sound waves are incident on the centrifugal glass wool, the sound waves can enter the material along with the pores, causing the air molecules in the pores to vibrate. Due to the viscous resistance of air and the friction between air molecules and the pore wall, sound energy is converted into heat energy and is lost. Sound absorption performance: Centrifugal glass wool has good sound absorption performance for mid and high frequencies. The main factors affecting the sound absorption performance of centrifugal glass wool are thickness, density, and airflow resistance. Density is the weight of material per cubic meter. Airflow resistance is the ratio of air pressure and air velocity on both sides of the m

  The polymer foaming material is a gas-solid two-phase composite material composed of polymer and gas molecules. It can have bubbles as the dispersed phase, polymer as the continuous phase, or both. The   extruded board   is a kind of polymer foam material. Polymeric foam materials can be divided into high, medium, and low density, open cell and closed cell, hard and soft, physical foam, chemical foam or free foam, Structural foaming can also be divided into thermoplastic and thermosetting foamed materials. When a large number of extruded panels purchased at the construction site are not in use temporarily, they need to be stored and can be used directly when needed. The storage method of the extruded board is very important, so what are the precautions for preserving extruded board? Prohibition of fire: No matter whether the extruded board is placed indoors or outdoors, any kind of fire should be prohibited. No flammable and explosive dangerous goods should be placed around it. At th

  The full name of the   extruded board   is extruded polystyrene foam board or extruded board for short, also known as XPS board. It is a material that is continuously extruded and foamed through a special process. The hard film formed on the surface is uniform, the inner closed-cell foams continuously and uniformly, and the honeycomb structure is formed. It has high compression, lightweight, no water absorption, air permeability, and resistance features such as abrasiveness and non-degradation. It is especially suitable for heat insulation, heat preservation, and moisture-proof treatment of buildings. Through positioning, the overall size of the template and the front and rear distance of the section can be adjusted to adjust the layout width, and then the positioning alignment can be adjusted to adjust the width of the card. 1. Thermal insulation The sealing rate of the extruded board structure is greater than 99%. The vacuum layer is formed to avoid airflow and heat dissipation to

  XPS extruded board   has the good waterproof and moisture-proof performance. Everyone knows that warehouses are used to store things and need to be moisture-proof. So what are the advantages of extruded boards for moisture-proof storage in warehouses? As we all know, the items stored in the warehouse must not be damp, otherwise the use-value of the product will be seriously affected, or even scrapped. To ensure a dry environment in the warehouse and reduce quality problems during storage, it is necessary to surround the warehouse with moisture-proof sheets to form a protective layer so that external factors will not cause any impact on it. Water absorption. Install the extruded board on the outer wall of the warehouse. Even in the rainy season, it is difficult to break through the line of defense of the board. A protective layer prevents rainwater from affecting the products in the warehouse. This is because the board has good water absorption and slows down as the temperature gradua