Which is the better difference between fire-retard

2022-07-22
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In our life, 90% of flame retardant boards are used in public places and commercial real estate, and few people know about them. There are also many kinds of fire-retardant boards, such as fire-retardant density board, fire-retardant plywood, fire-retardant blockboard, etc

in our life, 90% of flame retardant boards are used in public places and commercial real estate, and few people know about them. There are also many kinds of fire-retardant boards, such as fire-retardant density board, fire-retardant plywood, fire-retardant blockboard, etc. Next, the Millennium boat panel editor will introduce the difference between fire-retardant plywood and fire-retardant density board, and which is better:

first, fire-retardant plywood:

fire-retardant board (also known as fire-retardant board, fire-retardant plywood). Fire-retardant plywood is a three-layer or multi-layer plywood made of logs that are spun into wood chips or planed into small wooden blocks, and then glued with adhesives after fire-retardant treatment. Usually, odd layers of wood chips are used, And the fiber directions of adjacent layers of wood chips are glued vertically to each other. The fire-retardant material board produced with wood as the main raw material can generally overcome the defects of wood due to its reasonable structure and the production process of fine processing, so as to greatly improve and improve the physical and mechanical properties of wood. In addition, it also overcomes the lack of easy combustion of ordinary plywood and effectively improves the fire-retardant performance of plywood. This kind of board has five characteristics: flame retardancy, smoke suppression, corrosion resistance, insect resistance and stability, which can be said to be highly practical

flame retardant plywood has strong practicability. The excellent physical properties, processing properties and decorative functions of plywood are maintained. Millennium boat flame-retardant boards are widely used in public construction and decoration projects such as hotels, conference centers, convention and exhibition centers, sports centers, libraries, transportation and passenger transport centers, leisure and entertainment places, shopping malls, medical institutions, office buildings, building decoration projects of high-end residential buildings, and manufacturing projects of high-end furniture

II. Flame retardant density board:

in the production process of density board with superior performance, special additives such as waterproof agent, fireproof agent, preservative, etc. can also be added to make some density boards for special purposes. Flame retardant density board is one of them. It is a functional board processed by adding flame retardant in the production process of density board. Density board, also known as fiberboard, is an artificial board made of wood fibers or other plant fibers with urea formaldehyde resin or other applicable adhesives. The surface of the density board is smooth and flat, the material is fine and dense, and the secondary processing is convenient. It can paste planing thin wood, paint paper, impregnated paper and rotary cutting veneer. The internal structure is uniform, the density is moderate, and the stability is good

flame retardant density board has good physical and mechanical properties and processing properties, and can be made into plates of different thicknesses. Therefore, it is widely used in furniture manufacturing, construction, interior decoration, shipbuilding and automotive lamp industries. Fire resistant medium density fiberboard is a homogeneous porous material with good acoustic performance. It is a good material for making speakers, TV shells and musical instruments. In addition, it can also be used in ships, vehicles, sports equipment, floors, wallboards, partitions, etc. to replace natural wood. It has the characteristics of low cost, simple processing, high utilization rate, and is more economical than natural wood

III. The difference between fire-retardant plywood and fire-retardant density board:

the difference between fire-retardant plywood and fire-retardant density board lies in the physical properties of its substrate. Fire-retardant plywood has high structural strength, stable performance, good load-bearing capacity, good nail holding capacity, low requirements for processing equipment and easy processing. Flame retardant density board has the characteristics of good surface flatness and easy engraving and milling

IV. classification of flammability of fire-retardant plywood

according to GB8624-1997 classification of flammability of building materials and products, fire-retardant boards are divided into class a non combustible materials: class a homogeneous materials and class a composite (sandwich) materials; Class B combustible materials: Class B1 materials, class B2 materials and class B3 materials. According to GB8624-2006 classification of flammability of building materials and products, it is divided into A1, A2, B, C, D, e and F. The grade B1 flame retardant board of 1997 standard can correspond to the grade B and C flame retardant board of 2006 standard. However, the most common fire-retardant board in the plate market basically belongs to class B fire rating. At present, the fire-retardant board grades in the market mainly include: A1, A2, B and C

v. environmental protection grade of flame-retardant board

1. For the environmental protection standard of man-made board, the state has formulated GB18580-2001 formaldehyde emission limit in indoor decoration materials, man-made board and its products, in which E1 grade and E2 grade are formulated according to the free formaldehyde emission limit of unit specification board,

e0 grade (formaldehyde emission ≤ 0.5mg/l): it is the environmental protection standard of European ring agreed by the enterprise self-discipline

e1 level (formaldehyde emission 0.5mg-1.5mg/l): it is the highest environmental protection level in the national environmental protection standards, and also the lowest environmental protection level of indoor decoration

e2 level (formaldehyde emission greater than 1.5mg/l): generally used for outdoor decoration, but not directly used for indoor decoration

2. The F-star certification in Japan is a series of Japanese JAS series certification on the wood products industry, which is divided into four levels. Compared with the European e-level certification, it is a progress. Its fundamental core is still the formaldehyde emission, but it is relatively higher than the e-level standard. There is a strict testing requirement for the tested products: the testing area is not less than 0.18 square meters, and edge banding testing is not allowed for the plates, in order to ensure that the most real formaldehyde emission is detected. Let's take a look at the four grades of the F-star standard:

F ★ (≤ 5.0mg/l) formaldehyde emission per L is less than or equal to 5mg

F ★★ (≤ 1.5mg/l) formaldehyde emission per L is less than or equal to 1.5mg

F ★★★ (≤ 0.5mg/l) formaldehyde emission per L is less than or equal to 0.5mg

F ★★★★★ (≤ 0.3mg/l) formaldehyde emission per L is less than or equal to 0.3mg

3 In the California Air Resources Board (hereinafter referred to as CARB), wood composite products are divided into three levels, P1, P2, and the highest level NaF, which is also called formaldehyde free exemption certification. From January 1st, 2009, composite wood products that have not passed carb certification and finished products containing composite wood products cannot enter the U.S. market

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