What is the material of the flame-retardant board and what are the specifications? Fire rating standard of flame retardant board

Flame-retardant board is processed on the basis of plywood. It is light in weight, easy to process, easy to construct, and reduces cost. As a decorative board, it is popular and purchased by consumers. flame retardant plywood has a wide range of uses, but the fire rated grade of flame retardant plywood is different, and the application places are also different. The following is a detailed introduction to what is a flame-retardant board, the specifications of the flame-retardant board, and how to choose and buy the flame-retardant board.


What is flame retardant board?

Flame-retardant board, also known as fire rated plywood, fire retardant mdf, flame retardant plywood, etc, which is produced with wood as the main raw material, due to the rationality of its structure and the fine processing in the production process. It can substantially overcome the defects of wood and improve the physical and mechanical properties of wood. At the same time, the fire retardant plywood also overcomes the shortcomings of ordinary plywood that is easy to burn, and effectively improves the flame retardant performance of the plywood. However, the fire treated plywood does not mean that it will not burn, it just prevents the fire from spreading rapidly.


Fire resistant plywood specifications

The size is generally 4x8 fire rated plywood. The common thicknesses are 4 mm, 5 mm, 9 mm, 12 mm, 15 mm, 16 mm, and 18 mm. The thicker the thickness, the stronger the flame retardant performance. Different places require different thicknesses.


Flame retardant board application

Flame retardant board is suitable for all indoor environments such as homes, hotels, entertainment venues, bathing areas, offices, kitchens, toilets, schools, hospitals, sports fields, shopping malls, laboratories, etc. It can be used as home furnishings or wall hangings. decorate.


Types of flame retardant board

The first type of flame retardant plywood is weather-resistant, boiling water-resistant, which has the advantages of durability, high temperature resistance, and steam treatment.

The second type of flame retardant plywood is water-resistant, which can be dipped in cold water and hot water for a short time.

The third type of flame retardant plywood is moisture-resistant, which can be dipped in cold water for a short time and is suitable for indoor use at room temperature. Used for furniture and general construction purposes.

The four types of flame-retardant plywood are non-moisture-resistant, used indoors under normal conditions, mainly for general purposes such as indoor partition walls.


The difference between flame retardant plywood and fireproof plywood

1. The difference in production method

In the production process of fire-retardant board and fireproof plywood laminating technology is used, but the fire-retardant board is a piece of wood commonly used in daily life, after being thinned section by section, and then glued together with adhesive. Generally speaking, in the process of making a set of flame-retardant boards, the amount of plate-like wood used is an odd number. In the production process of the fireproof board, the metal board and the inorganic substance are subjected to a hot-pressing composite process to form a special sandwich board with abundant materials.


2. Thickness difference

Although these two kinds of boards can have a certain fire prevention effect, because in the production process of the flame-retardant board, only wood is used as the raw material and a certain amount of binder is added. The production process of fire rated panels uses materials with large thickness and strength such as metal plates. Therefore, the thickness of the finished fire-resistant panels is larger than that of the fireproof plywood. It is mainly used in some large-area construction buildings, especially the inner side of the building renovation work.


3. The difference in usage requirements

Flame-retardant board is a material with strong flame-retardant ability. Therefore, in some public places and buildings with high mobility of people, flame-retardant boards must be used as fire-retardant materials in accordance with relevant national regulations. The requirements for the use of fireproof boards are not so strict. Generally speaking, they are used in accordance with the choices of consumers or the recommendations of decoration workers.


Advantages and disadvantages of flame retardant board

Advantages of flame retardant board

1. First of all, the flame retardant board can prevent the fire from spreading and gain valuable time for escaping from the fire scene. Flame-retardant board does not mean that it will not burn, it just prevents the fire from spreading rapidly.

2. The flame-retardant board is processed on the basis of plywood, which is light in weight, easy to process, convenient in construction, and lower in cost.

3. The flame-retardant board has good structural strength and strong bending resistance.

Disadvantages of flame retardant board

1. The flame-retardant board will produce toxic gases during the combustion process, but some large-brand flame-retardant boards use advanced flame retardants to greatly reduce the production of toxic gases in the fire.

2. After the flame-retardant board is treated with flame-retardant, it will have a certain influence on the bonding strength of the board.


Fire rating of flame retardant board

The fire rating of flame retardant board is mainly divided into 4 grades, namely a, b1, b2, and b3. The fire resistance coefficient of different grades is different.

1. Class a flame-retardant board: it is a non-combustible board. This kind of board will not burn and will not cause an open flame, so it is very safe to use and can truly achieve flame-retardant effects.

2. Class b1 flame retardant board: It has a relatively good flame retardant effect. It is difficult to catch fire in the case of high temperature or open flame, and even if it catches fire, the fire is not easy to spread.

3. Class b2 flame retardant board: It is a combustible board with a certain flame retardant effect. Although it is easy to be ignited, the burning speed is still relatively slow.

4. Class b3 flame-retardant board: It is a flammable board. This kind of board will not have the effect of flame retardant, and it is also very easy to burn.


How to choose flame retardant board?

1. From the appearance point of view, flame-retardant panels are used to be made of red, the color depth of flame-retardant panels has nothing to do with the flame-retardant effect, and is only used to distinguish them from ordinary plywood.

2. The flame-retardant plywood substrate is a multilayer plywood, and the purchase method is similar to that of plywood. The surface is free of cracks, wormholes, blisters, stains, deformation and other defects, and it is smooth and flat when touched by hand, without the feeling of thorns. There is no phenomenon of poor bonding strength such as degumming and opening, and there will be no "creaking" sound when picking up one end of the board.

3. The base material of high-quality flame-retardant plywood should be uniform, the thickness of the veneer should be uniform, and there should be no defects such as lamination, voids, and decay. Lightly tap each part of the board with your hand to make a crisp sound without obvious difference in sound.


Does the flame-retardant board need to be painted with fire-retardant coating?

There are two main types of fire-retardant boards, organic and inorganic. Whether to use fire-retardant coatings should be considered based on actual conditions. It is not necessary to use fire-retardant coatings for organic flame-retardant panels, because the fire-retardant grade of organic fire-retardant panels is relatively high. After the fire-retardant coating is applied, the fire-retardant grade will not change at all, but the flame-retardant time will increase. Inorganic flame-retardant boards need to be painted with fire-retardant coatings, which can increase the fire-retardant rating of the flame-retardant boards.


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