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The principle of flame retardant fire extinguishing

Flame retardant is a kind of material additives, generally used in engineering plastics, general plastics, textiles and so on. When we use flame retardants, we will doubt why flame retardants will extinguish the fire? What is the principle of flame retardancy? Today, we will answer your doubts in detail.

fire extinguishing principle of flame retardant:

1. Produces a gas that can extinguish the flame. For example, antimony trioxide reacts with HCl produced by combustion in polyvinyl chloride to produce a sulky gas, antimony oxynitride.

2. Absorbing the heat generated in the combustion process plays the role of cooling and slowing down the combustion speed. For example, the aluminum hydroxide molecule contains 34% chemically bound water, which remains stable at most plastic processing temperatures, but begins to decompose at temperatures above 200 degrees Celsius, releasing water vapor. For every aluminum hydroxide molecule that breaks down, it absorbs 36 kcal of heat.

3. Provide a layer of oxygen insulation coating. For example, the phosphide formed during combustion of a phosphate flame retardant is an oxygen insulating coating.

The formation of free radicals can react with plastics and play a flame retardant role. Their combustion behavior with plastic reaction products is very poor.

The above is about the principle of flame retardant fire extinguishing and flame retardant, I hope this knowledge is helpful to everyone.

The reason why aluminum hydroxide flame retardant can extinguish

Why does aluminum hydroxide have flame retardant function?

Real-time information

Zhongke Flame Retardant Organization Watches 20 Closing Ceremonies

On the morning of October 22, 2022, members of Zhongke Flame Retardant New Materials Co., Ltd. watched the closing ceremony of the 20th Congress under the leadership of General Manager Wang Ligui.

What are the reasons for the failure of flame retardant after adding aluminum hydroxide flame retardant?

Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.

As a flame retardant, magnesium hydroxide also need to improve what aspects?

When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.

Hefei Zhongke Flame Retardant New Material Co., Ltd

Sales Department Telephone:15905609730
Ministry of Foreign Trade Telephone:13956052398
Comprehensive department Telephone:0551-67712199
Company headquarters address: Hefei Feidong Economic Development Zone Xianghe Road 36
E-mail:hefei@zkxcl.com

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