At present, it is the end of the cold winter, the fire has entered a high incidence period, most of the fires occur in the building, after the fire, it is difficult to evacuate personnel, and some materials in the building will produce huge toxic and harmful smoke, which is easy to cause a large accident. The fire prevention and smoke toxicity properties of decoration and decoration materials in public places are very important. Now we would like to introduce you to a board with excellent fire performance - vermiculite slab. Vermiculite slab is a board with non-combustible, fireproof and thermal insulation properties with expanded vermiculite as the main raw material, added adhesives and other modifiers, and is also called expanded vermiculite fireproof board. This is a relatively new type of thermal insulation and fireproof material, which is mainly used in buildings, furniture, firewalls, ceilings, and can also be used for fire escapes, steel beam cladding, pipeline cladding, lining plates in fireplaces, wall partitions, vehicles, ships and other fields.
Vermiculite slabs have the characteristics of non-combustible, heat insulation, sound absorption, moisture-proof, and do not contain harmful substances. When heated to 1200 at high temperature, it does not produce harmful gases that endanger human health, is smokeless, non-toxic and tasteless, and its fire rating is usually Class A. Its melting point is 1370 1400, and the operating temperature is 1200. It has good flame retardancy, fire and heat preservation, and the thermal conductivity is 0 when it is 20013w/(m.k), with good thermal insulation performance, a wide range of applications, can be used in some thermal insulation occasions with the highest fire rating. The main function of vermiculite slab is fire prevention and heat preservation, and its fire performance is directly related to the safety of users and is an important index. In the standard of "Expanded Vermiculite Fireproof Board" (JC T 2341-2015), the fire resistance limit is not less than 90 minutes when the thickness of the plate is 25mm. The combustion performance should reach Class A, and the formaldehyde emission should not be greater than 9mg 100g.
The good fire performance of vermiculite slab is closely related to its main raw materials, material density and structural design. The standard of "Expanded Vermiculite Fireproof Board" (JC T 2341-2015) also requires the raw material expanded vermiculite, and the expanded vermiculite must meet the requirements of JC T441, that is, the quality standards such as sieve allowance and physical properties of expanded vermiculite have been rigidly stipulated. The average bulk density of expanded vermiculite is 100 130kg m3, it has a lot of void separation layers, has good heat insulation, sound absorption and frost resistance, expanded vermiculite not only has the effect of high temperature insulation, but also can withstand high temperature of 1200 degrees without melting. Therefore, vermiculite slabs produced with expanded vermiculite as the main raw material have excellent fireproof performance and are widely used. The density and structural design of vermiculite slabs can also affect their fire performance. The density of vermiculite slabs is low, and the strength is low, but the thermal insulation performance is good. The density of vermiculite slabs is high, and the strength is high, which should be considered comprehensively in production and use.
Although vermiculite slabs have good fire performance, they still need to be used correctly and follow safety precautions to ensure safety during use. In addition, there may be certain differences in the vermiculite slabs produced by different manufacturers, so it is recommended to understand the relevant technical specifications and certification standards of the product before purchasing, and choose a product that meets the requirements.