Extrusion polymerization benzene ethylene Foam board (extrusion board or XPS board for short) is made of polystyrene Vinyl resin And additives are extruded into plates with uniform cross section by a pressing die.
The extruded board has a continuous and uniform surface layer and closed cell honeycomb structure. The interconnected walls of these honeycomb structures have uniform thickness, and there is no gap between the bubbles. This structure makes the extruded board lower than other plate-like insulation materials in terms of water absorption, vapor permeability and thermal conductivity, while the compressive strength is very high, so it has excellent thermal insulation performance, good water resistance and high compressive strength.
Specifically, the extruded board has the following advantages:
1. Thermal insulation, good performance
The lowest thermal conductivity is the goal of all thermal insulation materials. The extruded board is mainly made of polystyrene, which is originally a better raw material with low heat conduction. The compact honeycomb structure formed by extrusion and extrusion can effectively prevent heat conduction. In this way, the thermal conductivity of the extruded board is far lower than that of EPS board, foaming polyurethane , thermal insulation mortar Pearlite and other thermal insulation materials, as low as 0.028W/mk, have the characteristics of high thermal resistance and low linear expansion rate.
2. Compression and impact resistance, superior strength
The closed cell structure of the extruded board is closely connected and there is no gap between the walls, so its compressive strength is high, up to 150-500Kpa. In this way, the extruded board has great bearing capacity and good impact resistance, and can adapt to long-term load requirements. Therefore, the extruded board is suitable for the thermal insulation construction of accessible roof parking roof, plaza, parking platform, airport runway, expressway and other projects where the thermal insulation layer needs high compressive performance.
3. Seepage prevention and water resistance, stable performance
The polystyrene molecular structure itself does not absorb water, and the extruded board has a closely connected closed cell structure with no gaps between the walls, so the water absorption rate of the extruded board is low, the volume water absorption rate is less than 1%, which is much smaller than that of other hard thermal insulation boards. The extruded board has good impermeability and water resistance. The physical properties of the moisture-proof material can remain unchanged even after a long time of blistering.
4. Durable and superior quality
General thermal insulation materials are easy to age after being used for several years, thus the thermal insulation performance will decline. The closed cell structure of the extruded board is closely connected and there is no gap between the walls. The physical and chemical properties are stable, so it has better anti-corrosion and aging relieving properties. The effective service life of the extruded board can reach 30-40 years, and its performance can still remain above 80% after 50 years of use.
5. Easy to construct and low cost
The honeycomb structure of the extruded board makes it have good strength, but it is not as brittle as polyurethane foam and phenolic foam: therefore, it is not easy to be damaged, and it is easy to handle, not easy to be damaged, and easy to cut, so it is convenient to transport and install. The selection of thermal insulation materials should not only consider the thermal conductivity, but also measure the weight ratio of different thermal insulation materials when reaching the same thermal resistance.
The thicker the insulation material is, the more difficult it is to construct, and the larger the unit weight is, the more structural load will be increased, which will indirectly increase the cost. But the strength of extruded plate is high
The unit weight is small, which will not affect the bearing capacity of the structure too much when used as wall insulation, so it will not increase the project cost. Extruded boards can obtain better thermal insulation performance with thinner external walls.
6. Non degradable, environmentally friendly products
The extruded board has stable chemical properties, is not easy to degrade, will not decompose and mildew, and has no harmful substances volatilization; At the same time, there is no
The solid leftovers formed by harmful gases and waste water can also be recycled, treated and reused, so the extruded board is a high-quality environmental protection product.
Therefore, the extruded board has the advantages of high compression resistance, light weight, moisture-proof, airtight, corrosion resistance, non degradation, etc. It is a superior thermal insulation and moisture-proof building material.
Extruded board has been widely used in wall insulation, concrete roof and steel roof insulation, low-temperature storage ground, parking platform, airport runway, highway and other fields of moisture-proof insulation, and is one of the better building energy saving materials in the building materials market at present.
