How to distinguish between good and bad flame-retardant boards, the secrets of flame-retardant boards.

Fire is the origin of human civilization. Tamed fire is a friend of mankind, bringing warmth and light. However, uncontrolled fire is the beginning of human disaster. Merciless fires cruelly take away our happy homes.

Faced with devastating fires, can we take preventative measures to minimize the losses and damage they cause?

Fortunately, modern civilization has promoted the development of science and technology, and more and more high-tech applications are being used in our lives. Flame-retardant boards are a reassuring solution, enabling us to fight against all preventable fire hazards.

Flame-retardant boards: the secret to flame retardancy

Flame retardant theory:

By relying on the surface covering effect of flame retardants, the exchange of matter and energy between the wood surface and the surrounding environment is prevented, thus cutting off the oxygen supply and inhibiting the generation of flammable gases, thereby slowing down the thermal decomposition of wood.

Thermodynamics:

Flame retardants are used in the board to dissipate heat, absorb heat, and insulate heat, thus inhibiting the wood from reaching its thermal decomposition temperature and igniting.

Non-flammable gas dilution theory:

When heated, flame retardants decompose into non-combustible gases, thus reducing the heat around the combustion surface. Simultaneously, the non-combustible gases dilute the concentration of combustible gases, interfering with the combustion chain reaction.

Free radical capture theory:

Halogen-based flame retardants can generate highly reactive free radicals at thermal decomposition temperatures. These free radicals can capture highly reactive OH radicals and H ions released during wood combustion, interfering with the combustion chain reaction.

Theory of volatile matter reduction:

Flame retardants catalyze the pyrolysis process of wood, causing it to develop in the direction of increasing charcoal production and reducing combustible gas dust, so as to form a protective layer on the surface and charcoal and inhibit flaming combustion.

Identification of flame retardant boards

touch:

Feel the surface of the board with your hand to see if it is smooth.

burn:

Cut off a small piece (2-3mm in diameter) with a blade and ignite it horizontally.

Grade A1: Non-flammable, does not produce open flame.

Grade A2: Non-flammable, smoke must be measured, and it must pass the test.

Class B1: Flame-retardant building materials: Flame-retardant materials have good flame-retardant properties. They are difficult to ignite when exposed to open flames or high temperatures in the air, do not spread quickly, and stop burning immediately when the fire source is removed.

Class B2: Combustible building materials: Combustible materials have a certain flame-retardant effect. They will ignite and burn immediately when exposed to open flames or high temperatures in the air, easily leading to the spread of fire. Examples include wooden pillars, wooden roof trusses, wooden beams, and wooden stairs.

B3 Class: Flammable building materials: have no flame retardant effect, are extremely easy to burn, and pose a great fire hazard.

pinch:

Pinch the core of the board with your fingernail to feel its hardness or softness; then use your fingernail to press upwards near the surface of the board and observe whether there is any peeling of the surface layer.

Bubble:

Soak a small sample in cold water for 24 hours and observe how much the thickness increases; then let it air dry naturally and observe the deformation of the surface after drying.

Flame retardant board

The flame-retardant board has a flame-retardant rating of B1, indicating good flame-retardant performance. In the event of a fire, it can effectively suppress open flames and reduce heat, thus buying more time for escape and firefighters to arrive.

According to the test report of the flame retardant board, the filter paper in the experiment was not ignited, nor did it reach the edge of the long wings of the sample, and there were no burning droplets or particles within 600s.

The flame-retardant plywood meets the national standard GB 20286-2006 "Requirements and Labelling for Combustion Performance of Flame-Retardant Products and Components in Public Places" in terms of flame retardancy, smoke suppression and smoke toxicity. It is a new generation of practical safety protection board in the home building materials industry.

Although fire is merciless, social progress and technological development have led to the advent of flame-retardant boards, giving us a greater ability to cope with sudden fires.