In our life, 90% of fire-proof panels are used in public places and commercial properties, but not many people know about them. There are many kinds of fire-proof boards, such as fire-proof density board, fire-proof plywood and fire-proof joinery. The following is the difference between fire-proof plywood and fire-proof density board, and which one is better.
I. Fire-proof plywood
Fire-proof plywood (also known as flame-retardant board, fire-proof plywood), fire-proof plywood is made of logs rotary cut into pieces of wood or wood planed into small wooden squares, the pieces of wood are treated with fire-proof and then glued with adhesive to make a three-layer or multi-layer plywood, usually with an odd number of layers of wood, and make the fiber direction of adjacent layers of wood pieces glued perpendicular to each other. Fire-retardant material board produced from wood as the main raw material, due to its reasonable structure and fine processing of the production process, largely to overcome the defects of wood, thereby greatly improving and enhancing the physical and mechanical properties of wood, in addition to its also overcome the shortcomings of ordinary plywood easy to burn, effectively improving the fire-retardant properties of plywood. This kind of rot resistant plywood has five characteristics of flame retardancy, smoke suppression, corrosion resistance, insect resistance and stability at the same time, tanalised plywood so it can be said to have strong practicality.
Flame retardant plywood has strong practicality. Maintaining the excellent physical properties, processing properties and decorative functions of plywood, first class fire-proof ply panels are widely used in public construction and decoration projects such as hotels, restaurants, conference centers, exhibition centers, sports centers, libraries, transportation passenger centers, leisure and entertainment venues, shopping malls, medical institutions, office buildings, high-grade 18mm pressure treated ply residential building decoration projects and high-grade furniture manufacturing projects.
Ⅱ. Fire-proof density board
The superior performance of the density board production process, but also to add special additives such as waterproofing agents marine treated plywood, fire retardants, antiseptics etc to create some special-purpose density board. Fire-proof density board is one of them diffrence with flame retardant plywood, is its functional board processed by applying fire-proof in the process of density board production process. Density board, also known as fiberboard, is a man-made board made from wood or other plant fibers, with urea-formaldehyde resin or other applicable adhesives. The surface of density board is smooth and flat, the material is dense, the secondary processing is convenient, and it can be pasted with planed wood, painted paper, impregnated paper and rotary cut veneer, etc. The internal structure is uniform, the density is moderate and the stability is good.
Flame-retardant MDF has good physical and mechanical properties and processing performance, and can be made into different thicknesses, so it is widely used in furniture manufacturing, construction, interior decoration, shipbuilding, automotive and other industries. Flame-retardant MDF is a homogeneous porous material with good acoustic properties, which is a good material for making speakers, TV shells and musical instruments. In addition, it can also be used for ships, vehicles, sports equipment, flooring, wall panels, partitions, etc. instead of natural wood, with low cost, simple processing, high utilization rate, more economical than natural wood.
Ⅲ. Fire-proof plywood and fire-proof density board difference
The difference between fire-proof plywood and fire-proof density board is in the physical properties of its substrate. bunnings treated plywood has high structural strength, stable performance, good load-bearing capacity, good nail holding force, low requirements for processing equipment and easy processing. Fire-proof density board has good surface flatness and easy carving and milling characteristics.
IV. Fire-proof plywood
Bunnings treated plywood performance classification According to GB8624-1997 “Classification of burning performance of building materials and products”, fire-proof plywood is divided into A grade non-combustible materials.
A-class homogeneous materials and A-class composite (sandwich) materials home depot pt plywood; B-class combustible materials anti termite treatment for plywood: B1-class materials and B2-class materials and B3 grade materials. And according to GB8624-2006 “Building materials and products burning performance classification” is divided into: Class A1, A2, B, C, D, E, F. The B1 grade fire-proof board of the 1997 standard can correspond to the B and C grade fire-proof board of the 2006 standard. But the most common fire-proof board in the sheet market basically belongs to the B fire grade, and the current grade of fire-proof board in the market mainly includes: A1, A2 , B, C four grades.
V. Fire-proof board environmental protection level
1. For man-made panels environmental protection standards, the state has developed “GB 18580-2001 indoor decoration materials man-made panels and their products in formaldehyde emission limits”, which according to the unit specifications of the plate free formaldehyde emission limits developed E1 level, E2 level, E0 level (formaldehyde emission ≤ 0.5mg / L): is the self-regulation of enterprises agreed to adopt the European environmental standards. E1 level (formaldehyde emission 0.5mg- 1.5mg / L): is the highest level of environmental protection in the national environmental protection standards, but also the lowest environmental protection level of indoor decoration. E2 level (formaldehyde emissions greater than 1.5mg/L): generally used for outdoor decoration, but can not be used directly for indoor decoration.
2. In Japan there are F-star certification is a series of Japanese JAS certification on the wood products industry, a total of four levels, compared to the European E certification, is an improvement, the fundamental core still lies in the formaldehyde emissions, but relatively than the E standard to improve. For the product under inspection has a strict testing requirements: the test area is not less than 0.18 square meters, and does not allow the board to seal the edge of the test, the purpose is to ensure that the detection of the most real formaldehyde emissions. Here we look at the four levels of the F-star standard.
F★ (≤ 5.0mg/L) formaldehyde emissions per L less than or equal to 5mg
F★★ (≤ 1.5mg/L) formaldehyde emissions per L less than or equal to 1.5mg
F★★★ (≤ 0.5mg/L) formaldehyde emissions per L less than or equal to 0.5mg
F★★★★（≤ 0.3mg/L） Formaldehyde emission is less than or equal to 0.3mg per L
3. In the United States California Air Resources Board (hereinafter referred to as CARB) for wood composite products are divided into three levels, respectively, P1, P2, and the highest level NAF, NAF is also called formaldehyde exemption certification. From January 1, 2009 without CARB certification of composite wood products and finished products containing composite wood products are not allowed to enter the U.S. market.