Flame-retardant board (also known as flame-retardant board, fire-retardant plywood), fire-retardant plywood is rotated from the log into wood chips or wood planed into small wooden squares, the wood chips after the flame-retardant treatment and then glued together three Layers or layers of plywood, usually odd-numbered wood chips, and the adjacent layers of wood fibers from the vertical direction of the glue. In our lives, 90% of fire-retardant panels use public places and commercial real estate applications. There are not many people who know about them. Here are the grades and categories of fire-retardant plywood for everyone.
First, fire-retardant plywood combustion performance classification According to GB8624-1997 "Building materials and products combustion performance classification", fire-retardant board is divided into, A-level non-combustible materials: A-level homogeneous material and A-level composite (sandwich) materials; Class B Combustible materials: B1 material and B2 material and B3 material. According to GB8624-2006 "Building materials and products combustion performance rating" is divided into: A1 level, A2 level, B level, C level, D level, E level, F level. The standard Class B1 flame retardant plate in 1997 can correspond to the standard 2006 Grade B and C flame retardant plates. However, the most common fire-retardant board in the plate market basically belongs to the Class B fire rating. Currently, the flame retardant board grades on the market mainly include: A1, A2, B, C four levels.
Second, flame retardant board environmental protection grade
1. For the environmental standards for man-made boards, the State has established the “GB18580-2001 Limits for Formaldehyde Release in Interior Decoration Materials for Wood-based Panels and Productsâ€, in which E1 and E2 levels have been established based on the free formaldehyde emission limits for unit sizes.
E0 grade (formaldehyde emission ≤ 0.5mg/L): It is the European environmental protection standard adopted by the enterprise self-discipline.
E1 level (formaldehyde emission 0.5mg-1.5mg/L): It is the highest level of environmental protection in the national environmental protection standards and the lowest environmental protection level for interior decoration.
E2 grade (formaldehyde emission is greater than 1.5mg/L): generally used for outdoor decoration, but can not be directly used for interior decoration.
2. F-star certification in Japan is a series of wood products industry JAS series certification in Japan, divided into four levels, compared with the European E-level certification, is a progress, and its fundamental core is still formaldehyde emission, but Compared to the E-class standard, it has to be improved. There is a strict inspection requirement for the product to be inspected: the inspection area is not less than 0.18 square meters, and the sealing edge detection of the board is not allowed. The purpose is to ensure the most real amount of formaldehyde emission is detected. Let's take a look at the four levels of the F-star standard:
F★(≤5.0mg/L) Formaldehyde emission is less than or equal to 5mg per L
F★★(≤1.5mg/L) Formaldehyde emission is less than or equal to 1.5mg per L
F★★★(≤0.5mg/L) Formaldehyde emission is less than or equal to 0.5mg per L
F★★★★ (≤0.3mg/L) formaldehyde emission is less than or equal to 0.3mg per L
3, in the California Air Resources Board (hereinafter referred to as CARB) for wood composite products are divided into three levels, respectively P1, P2, and the highest NAF, NAF 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 US market.
Third, the type of fire-retardant plywood In accordance with the fire-retardant board's water, moisture-proof performance, the flame-retardant board is divided into the following four categories:
One type of flame retardant board is a weather resistant, boiling water resistant flame retardant plywood, and thus has the advantages of durability, high temperature resistance, and steam treatment.
The second type of flame retardant board is a water-resistant flame retardant board that can be impregnated in cold water and impregnated with hot water for a short time.
The three types of flame-retardant panels are moisture-resistant and flame-retardant panels that can be impregnated in cold water for a short period of time and are suitable for use at room temperature. Used for furniture and general construction purposes.
The four types of flame-retardant panels are non-damp-resistant and flame-retardant panels. They are used under normal indoor conditions. They are mainly used for antimony and general-purpose fire-retardant panels. There are wood, Ash, birch, beech, poplar and others.
Fourth, B1 and C-class flame retardant plate difference
GB 8624-2006 Test requirements for Class B and C combustion performance of building products (other than floor covering materials):
1. The flammability test (GB/T 8626), in which the flame propagates at a vertical distance from the ignition point within 60 s under the condition that the flame bombards the sample for 30 s (if necessary, also bombards the edge of the sample with a flame). (C, B Same level).
2. The monomer burning test (GB/T 20284) evaluates the effect of the product itself on the fire in a fire scene where there is a single source of combustion near the simulated product in the corner of the room. There are three specific indicators, namely: A. Flame lateral spread (LFS) shall not reach the edge of the sample (C, B with the same). B. FIGRA 0.4MJ total heat release. The threshold value for combustion is 0.4MJ and the growth rate of the index C is ≤ 250 W/S, and B is ≤ 120 W/S. C.THR600S (total heat release at 600 s) Class C ≤ 15 MJ, Class B ≤ 7.5 MJ.
3, according to GB/T 20285 for testing, production of additional smoke levels s1, s2, s3, burning drops / particles of additional levels d0, d1, d2, smoke production toxicity levels t0, t1, t2.
B, C combustion test determination:
Using flame-retardant B grade plates and C grade plates to cut a small piece (diameter 2-3mm);
1, C-level board detection: horizontal ignition, self-extinguishing within 5 seconds and no smoldering, fire-retardant density board is C-class should be no problem;
2. Class B board inspection: vertical ignition, self-extinguishing within 2 seconds, and no smoldering, flame retardant MDF B grade should be no problem.
Note: If horizontal lighting does not self-extinguish or self-extinguishing but there is smoldering smoldering, attention should be paid. The B1 level is somewhere in between and is closer to the B level requirement.
Sixth, flame retardant plywood use:
Flame-retardant board This board has five characteristics: flame retardancy, smoke suppression, anti-corrosion, insect resistance and stability. It can be said that it has strong practicality. Maintaining the excellent physics performance, processing performance and decorative function of traditional wood-based panels, Millennium Boat Flame Retardant is widely used in hotels, hotels, convention centers, convention centers, sports centers, libraries, transportation passenger transport centers, leisure and entertainment venues, and shopping malls. , medical institutions, office buildings and other public construction and decoration projects, high-end residential construction and renovation projects and high-end furniture manufacturing projects.
First, fire-retardant plywood combustion performance classification According to GB8624-1997 "Building materials and products combustion performance classification", fire-retardant board is divided into, A-level non-combustible materials: A-level homogeneous material and A-level composite (sandwich) materials; Class B Combustible materials: B1 material and B2 material and B3 material. According to GB8624-2006 "Building materials and products combustion performance rating" is divided into: A1 level, A2 level, B level, C level, D level, E level, F level. The standard Class B1 flame retardant plate in 1997 can correspond to the standard 2006 Grade B and C flame retardant plates. However, the most common fire-retardant board in the plate market basically belongs to the Class B fire rating. Currently, the flame retardant board grades on the market mainly include: A1, A2, B, C four levels.
Second, flame retardant board environmental protection grade
1. For the environmental standards for man-made boards, the State has established the “GB18580-2001 Limits for Formaldehyde Release in Interior Decoration Materials for Wood-based Panels and Productsâ€, in which E1 and E2 levels have been established based on the free formaldehyde emission limits for unit sizes.
E0 grade (formaldehyde emission ≤ 0.5mg/L): It is the European environmental protection standard adopted by the enterprise self-discipline.
E1 level (formaldehyde emission 0.5mg-1.5mg/L): It is the highest level of environmental protection in the national environmental protection standards and the lowest environmental protection level for interior decoration.
E2 grade (formaldehyde emission is greater than 1.5mg/L): generally used for outdoor decoration, but can not be directly used for interior decoration.
2. F-star certification in Japan is a series of wood products industry JAS series certification in Japan, divided into four levels, compared with the European E-level certification, is a progress, and its fundamental core is still formaldehyde emission, but Compared to the E-class standard, it has to be improved. There is a strict inspection requirement for the product to be inspected: the inspection area is not less than 0.18 square meters, and the sealing edge detection of the board is not allowed. The purpose is to ensure the most real amount of formaldehyde emission is detected. Let's take a look at the four levels of the F-star standard:
F★(≤5.0mg/L) Formaldehyde emission is less than or equal to 5mg per L
F★★(≤1.5mg/L) Formaldehyde emission is less than or equal to 1.5mg per L
F★★★(≤0.5mg/L) Formaldehyde emission is less than or equal to 0.5mg per L
F★★★★ (≤0.3mg/L) formaldehyde emission is less than or equal to 0.3mg per L
3, in the California Air Resources Board (hereinafter referred to as CARB) for wood composite products are divided into three levels, respectively P1, P2, and the highest NAF, NAF 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 US market.
Third, the type of fire-retardant plywood In accordance with the fire-retardant board's water, moisture-proof performance, the flame-retardant board is divided into the following four categories:
One type of flame retardant board is a weather resistant, boiling water resistant flame retardant plywood, and thus has the advantages of durability, high temperature resistance, and steam treatment.
The second type of flame retardant board is a water-resistant flame retardant board that can be impregnated in cold water and impregnated with hot water for a short time.
The three types of flame-retardant panels are moisture-resistant and flame-retardant panels that can be impregnated in cold water for a short period of time and are suitable for use at room temperature. Used for furniture and general construction purposes.
The four types of flame-retardant panels are non-damp-resistant and flame-retardant panels. They are used under normal indoor conditions. They are mainly used for antimony and general-purpose fire-retardant panels. There are wood, Ash, birch, beech, poplar and others.
Fourth, B1 and C-class flame retardant plate difference
GB 8624-2006 Test requirements for Class B and C combustion performance of building products (other than floor covering materials):
1. The flammability test (GB/T 8626), in which the flame propagates at a vertical distance from the ignition point within 60 s under the condition that the flame bombards the sample for 30 s (if necessary, also bombards the edge of the sample with a flame). (C, B Same level).
2. The monomer burning test (GB/T 20284) evaluates the effect of the product itself on the fire in a fire scene where there is a single source of combustion near the simulated product in the corner of the room. There are three specific indicators, namely: A. Flame lateral spread (LFS) shall not reach the edge of the sample (C, B with the same). B. FIGRA 0.4MJ total heat release. The threshold value for combustion is 0.4MJ and the growth rate of the index C is ≤ 250 W/S, and B is ≤ 120 W/S. C.THR600S (total heat release at 600 s) Class C ≤ 15 MJ, Class B ≤ 7.5 MJ.
3, according to GB/T 20285 for testing, production of additional smoke levels s1, s2, s3, burning drops / particles of additional levels d0, d1, d2, smoke production toxicity levels t0, t1, t2.
B, C combustion test determination:
Using flame-retardant B grade plates and C grade plates to cut a small piece (diameter 2-3mm);
1, C-level board detection: horizontal ignition, self-extinguishing within 5 seconds and no smoldering, fire-retardant density board is C-class should be no problem;
2. Class B board inspection: vertical ignition, self-extinguishing within 2 seconds, and no smoldering, flame retardant MDF B grade should be no problem.
Note: If horizontal lighting does not self-extinguish or self-extinguishing but there is smoldering smoldering, attention should be paid. The B1 level is somewhere in between and is closer to the B level requirement.
Sixth, flame retardant plywood use:
Flame-retardant board This board has five characteristics: flame retardancy, smoke suppression, anti-corrosion, insect resistance and stability. It can be said that it has strong practicality. Maintaining the excellent physics performance, processing performance and decorative function of traditional wood-based panels, Millennium Boat Flame Retardant is widely used in hotels, hotels, convention centers, convention centers, sports centers, libraries, transportation passenger transport centers, leisure and entertainment venues, and shopping malls. , medical institutions, office buildings and other public construction and decoration projects, high-end residential construction and renovation projects and high-end furniture manufacturing projects.
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