What is the difference between polystyrene board and extruded board? These two kinds of boards are insulation boards, which are used for the external wall insulation of buildings. There are many materials used for building insulation, such as extruded board, polystyrene board, rock wool board, glass wool, polyurethane board, phenolic board, etc. But we often see extruded board and polystyrene board are compared together. Why?
I think the key is that these two kinds of plates are both processed from the same raw material and have similar effects and uses. The raw material for processing and manufacturing these two plates is polystyrene, which is abbreviated as PS It is a colorless and transparent thermoplastic, which is softened after heating and hardened after cooling. This process can be repeated for many times. After heating, we make it into various shapes, such as cups, bowls and chopsticks, and then cool it for use. PS The glass transition temperature of one hundred It is above ℃, so there is no problem to use the water cup made of it to hold boiled water, like most of the plastic products used in our daily life ps texture of material.
The first polystyrene product will be treated as waste after being used. Because of its thermoplasticity and reusability, it is obviously wasteful to eliminate it at one time. We recycle its waste products and reheat them to make new products, but the recycled products will contain many impurities. The performance of the finished products is far less than that of the first time, The sanitary conditions of food grade items that need to be imported are even worse, but we have no problem in processing them into building materials for building materials.
xps Plastic extruded board And polystyrene board was born in such an environment and demand. After different processing methods, two different materials were produced. Both of them have the same heat preservation function. They are used on the exterior wall of the building to insulate and insulate, which can reduce the energy consumption of the building, reduce the loss of indoor temperature in winter, and reduce the invasion of outdoor hot gas in summer. They have their own advantages, Next, we will compare their characteristics one by one in detail.
The differences between extruded board and polystyrene board are as follows:
Front: comparison of air permeability between extruded board and polyphenyl board: polyphenyl board has better air permeability than extruded board, and the extruded board has almost no air permeability, so it is easy to cause moisture condensation on both sides of the board in areas with large indoor and outdoor temperature difference.
Second: comparison of adhesive strength between extruded board and polystyrene board: for thin plastering system of external wall insulation system, this indicator will affect the use of boards, XPS The good compressive strength of the extruded board is more reassuring to use.
Third: EPS Advantages and disadvantages of polystyrene board insulation system: its advantages are light weight, lighter volume weight than extruded board, cheaper price, and easy to accept by users; The disadvantage is that due to the performance problem of the plate itself, the strength is not high and the bearing capacity is low, the external wall insulation should be strengthened, and the plate should be placed for a period of time before it can be used when it leaves the factory.
Fourth: XPS Extruded board insulation Advantages and disadvantages of the system: it has the advantages of low thermal conductivity, better thermal insulation performance than ordinary insulation boards, and light weight. Under the same thermal insulation effect, the extruded board is lighter and thinner. It also has good waterproof and moisture-proof property, so it can be used in waterproof and moisture-proof areas. It also has thermal insulation property in humid environments, so buildings with special requirements for thermal insulation like cold storage are more suitable XPS Plastic extruded board. Its disadvantage is poor air permeability, and its price is more expensive than polystyrene board.
