Advantages of phenolic foam insulation board
1, excellent fire protection performance: organic thermal insulation materials such as polyurethane and polystyrene will produce smoke and poison after burning, which is easy to cause death and increase the difficulty of fire fighting. Phenolic insulation board, on the other hand, is incombustible in case of fire, and its combustion performance reaches Grade A, with the highest service temperature of 180℃ (allowing instant 250℃), 100? The flame retardancy of phenolic foam with a thickness of mm can reach 1? A few hours or more without being penetrated. Under the direct action of flame, there are phenomena of carbon deposition, non-dripping, non-curling and non-melting. After the flame burns, a layer of graphite foam is formed on the surface, which effectively protects the internal foam structure.
2. Excellent thermal insulation performance: low thermal conductivity (
3. Anti-corrosion and anti-aging: It can resist the corrosion of almost all inorganic acids, organic acids and organic solvents. Long-term sun exposure has no obvious aging phenomenon, so it has good aging resistance;
4. Low density and light weight: phenolic insulation board density is below 100㎏/m3, and can reach about 50㎏/m3. Can reduce the weight of the building, reduce the load of the building, reduce the structural cost, the construction is simple and fast, and the work efficiency can be improved;
5. Sound absorption performance: phenolic insulation board has excellent sound absorption performance, and closed-cell foam structure is more conducive to sound insulation;
6. Environmental protection: Rock wool and glass wool are harmful to the environment and people. When polyurethane and polystyrene are burned and heated, they will decompose toxic gases such as hydrogen cyanide and carbon monoxide. Phenolic insulation board adopts fluorine-free foaming technology and contains no fiber, which meets the national and international environmental protection requirements.
Disadvantages of phenolic foam insulation board
1. The fire resistance rating is B, and the highest can reach A2, but it increases the cost. In order to increase its compressive strength and tensile strength, an inorganic board or mesh cloth is usually attached to both sides.
2. The service temperature is -60℃~ 150℃, so it cannot be used at high temperature. Theoretically, it will resist high temperature divergence. The high temperature mentioned here will never exceed 200℃, not counting high temperature, and there must be poisonous smoke if it exceeds it.
3. The physical properties are not ideal, the overall cohesiveness is not good, the compressive and flexural capacity is extremely low, and it is generally necessary to use thick ones, which is not suitable for every insulation project; Phenolic aldehyde itself is brittle and easy to pulverize, so it is not suitable for external walls. Need to be reworked, and the construction loss is relatively large. It is not safe to use phenolic board as external insulation and then paste tiles. Many products on the market are hand-ground into powder, which is not suitable for interior and exterior walls because of its low toxicity. B-grade phenolic foam board is used for thermal insulation, and it is better to use B 1 grade extruded board instead, which is cheap, high in strength and good in thermal insulation.
4. High cost and high price. Its cost and price of course depend on the proportion of raw materials. In order to occupy the market at a low price, many board factories look for loopholes in proportion to reduce costs. The board is inflexible, the strength is gone, and the quality is very sad. How many years can you last on the wall? Nobody knows. If it must be used on the external wall, it must be used after the composite inorganic board. According to the current price of raw materials, the price of inorganic composite phenolic foam board should not be lower than 1 and 500 yuan /m3, and the cost will not be lower than 1 1,000 yuan /m3 with a little modification. If it is low, it is an inferior product.
5. Organic matter can't resist aging. If it is exposed to ultraviolet rays for a long time, phenolic insulation board will lose its function and shorten its life.
6. Pollution to the environment. Because phenol and formaldehyde are used in the production process, the production of phenol and formaldehyde is a highly polluting project.
7. Different enterprises have different product improvement methods, and the product quality is quite different.
Phenolic foam insulation board has many advantages, which has brought great help to our lives, but we can't ignore some shortcomings just because this product is very good. We should be aware of these shortcomings, foster strengths and avoid weaknesses, give full play to the benefits of products, and try our best to control the shortcomings of phenolic foam insulation board, so that this kind of phenolic foam insulation board can better serve our lives. The advantages and disadvantages of phenolic foam insulation board are introduced here. You got it? If you have any questions, you can consult relevant people.