quality PU Sandwich Panel & EPS Sandwich Panel manufacturer

High-density polyurethane sandwich panels can play a role in insulation, and are mostly used in the interior and exterior wall panels of construction sites. To the insulation effect, the sandwich board can also achieve a certain fire effect, so how is it achieved?   The first thing to pay attention to is the raw materials of the product. The main materials of the factory are polyurethane foam and flame retardant, which is a self-breathing material that is not easy to burn and is not easy to burn in case of fire. Its softening point can be as high as 250 ° C, and it can be decomposed when encountering higher temperatures, fundamentally avoiding slightly higher temperature combustion.            ​     When the polyurethane core material burns, carbon deposits form on the foam surface. Not only does this layer of carbon not burn, it also insulates the flame from the underlying polyurethane foam, causing the flame to lose its burn and thus preventing the fire from spreading. At the same time, the high-density polyurethane insulation composite board will not produce harmful gases at high temperatures, and it is a safe insulation board, and the building insulation and fire prevention project can also be used with confidence.                         

Sandwich panels are one of the most economical thermal insulation solutions, offering increased durability, shorter installation times, less maintenance requirements, and increased sound and thermal insulation. In addition, they can be adapted to all building needs and types, with different types of panels for each case.                   Divide panel types by purpose   Exterior sandwich panel Sandwich panels come in a wide variety of finishes and are a popular choice for exterior wall decoration. The advantage of sandwich panels is that because the fixtures are hidden, the end result is very beautiful. Other advantages of sandwich panels include lightness, modularity and high insulation properties.   This type of sheet is mainly used for the insulation of external walls and walls, as well as the insulation of internal walls. They are suitable for industrial buildings, sports centres, residential and public buildings.         Roof sandwich In this case, unlike exterior panels, these panels are highly susceptible to rain, snow or wind, as well as their weight. They are installed on the roofs and decks of all types of buildings, although they are most commonly used on roofs with a slope of at least 7%.   Their installation is usually combined with waterproof joints, making installation quick and easy and without reducing the insulation of the roof. Self-drilling screws are also used to secure them to the structure and a sealing system is used to prevent water seepage.   The most basic roof sandwich panel models have no decorative exterior finishes. Therefore, it is possible to choose a tile type sandwich board with a metal sheet covering that has a similar appearance to tile. Therefore, it is mainly used in residential construction. There is also a sandwich panel specially designed for farm roofs that is specially treated to provide additional protection against the particular environmental conditions in which the panel is located.   Refrigeration panel These panels are also used to insulate temperature-controlled Spaces, such as cold rooms or freezers. In these cases, the sandwich plate type used is thicker to withstand extremely low temperatures. They provide the best insulation and are easy to install.   The characteristics and performance of the sandwich plate need to be considered     This modular prefabricated insulation system is a big advantage because it is light in weight and quick and easy to install. Similarly, the size,   thickness and surface treatment of the sandwich panels can be customized.   It also has a low thermal conductivity, making it an excellent thermal insulation material, is highly durable due to the protection of the outer   layer, and is also very fire resistant. The sandwich panel is also completely impervious to water, steam and air, which also extends its service   life. They also have excellent sound insulation.

  1. Process flow Construction preparation 1 Check purlin specifications and laying size 1 matching board 1 laying nail color steel sandwich board - water test 1 inspection   2. Operation method (1) Construction preparation: Before laying the nail sandwich board, the preparation work should be completed. Check purlin specifications and laying size: check whether the specifications, spacing and slope of purlin laying meet the structural design requirements, in addition to the end of each roof panel should be set purlin support, the middle part should also be set one to two more purlins.   (2) Plate allocation: Drawing plate arrangement diagram according to the design drawing and the size of the actual roof part on site, as the basis for cutting various plates, and numbering the cut plates according to the order of the arrangement diagram to facilitate construction.   (3) Laying and fixing color steel sandwich board When paving the board should be pulled through the line to achieve vertical and horizontal alignment. The long (longitudinal) lap should be located at the bar (the lap should be welded with double purlin or purlin side), the two boards should be extended to the support member, the support length of each board is greater than or equal to 50mm, the lap direction should be in the direction of the maximum annual wind lap, the longitudinal lap length is: when the roof slope is greater than or equal to 10% is 200mm; When the roof slope is less than 10%, it is 250mm. The end (transverse) lap should be connected in the direction of the current water, the length of the lap should be determined according to the specific plate type, and the direction of the lap should be consistent with the dominant wind direction; The roof plate starts from one end of the cornice, and is laid simultaneously to the other end and the direction of the roof ridge; When laying, the roof plate and the wall are fixed with the wall plate fixing clamp, the support at both ends of each roof plate should be fixed with self-tapping screws and purlins: longitudinal connection, the distance is less than or equal to 350mm, and the connection of each board with the same purlin and wall beam shall not be less than 3 points, non-longitudinal connection shall not be less than 2 points; The connection points at the ridge and cornice should be properly encrypted. When drilling, the roof plate and the strip should be drilled through vertically. When fixing bolts, the waterproof sealing gasket should be padded first, and the rubber gasket and stainless steel gland should be fastened firmly. When paving the board, the board is connected with the board with rivets, and the distance is generally 100mm~500mm. A long sealing strip should be placed at the long lap joints of the two plates, and two sealing strips should be placed at the ends. The sealing strips should be continuous and uninterruptable. The sandwich plate should be fixed with galvanized bolts with waterproof washers, and the fixing point should be set on the crest of the wave. All leaking screws should be protected by sealing materials, and there should be no leakage. After the bolts are tightened, the joints of the two plates are sealed with silicone sealant: After the board is laid, the long (longitudinal) joints of the two boards should also be connected with rivets, which are sealed with silicone sealant and protected by metal or plastic gland: Valley: Requirements for fixed position: self-tapping screws and rivets are set at the crest of the roof when used: set at the wave when used on the wall Ridge laying: First of all, along the ridge line in the adjacent two on the ridge board, the roof board is placed on the ridge board, the roof board, ridge board, purlin with bolts fixed; Secondly, polyurethane foam is filled into the concave space formed along the ridge of the two-slope roof panel, and then the polyethylene foam plug is glued to the end of the two-slope roof panel: Finally, the ridge board and the water baffle are fixed with rivets, and the long tape is added, as shown in the figure                   Cornice laying: along the end of the sandwich board, lay the cornice sealing plate and fix, the structure is shown in the figure             At the junction between the roof panel and the gable wall, the outer side of the roof panel and the top of the gable wall are uniformly wrapped with Angle plates, and the top of the Angle plate is set at a 2% slope to one side of the roof, as shown in the figure           Water test: After the roof board is nailed, spray wine can be taken to do water test, water time is not less than 2h, check whether the roof leakage phenomenon, if found problems, should be repaired in time to the leakage point. Inspection and acceptance: After the roofing board is nailed, the construction unit shall carry out internal inspection first and deal with the quality problems in time. After passing the initial inspection, the supervision and construction unit shall be organized to carry out the acceptance inspection and go through the acceptance procedures.