Most of textiles are flammable or combustible materials. How to reduce the risk of textile combustion and the release of toxic gases during combustion has aroused people’s general attention and attention. With the establishment and perfection of Fire Protection Regulations and flammability standards of textiles, there are more and more performance requirements for flame-retardant textiles. Therefore, textile combustible technical regulations have gradually become an important part of technical barriers to trade in various countries. Flame retardant products can reduce the occurrence of fire from the source, so it is very important to study the flame retardant properties of textiles, the environment-friendly flame retardants, which are clean, efficient and compatible with textiles, have become the most important in the development of flame retardant technology.
The recognized environment-friendly flame retardants mainly refer to halogen-free, formaldehyde-free flame retardants. The flame retardants can minimize the harm to human health and the environment, and realize low toxicity, low smoke and no environmental pollution. Flame retardants can be divided into additive flame retardants and reactive flame retardants according to the processing method of materials, flame retardants mainly include organic flame retardants, inorganic flame retardants, organic and inorganic composite or compound flame retardants 3.
Among them, inorganic hydrous metal flame retardants mainly include Magnesium hydroxide, Aluminum hydroxide, hydrotalcite, etc. , these substances have non-toxic, non-corrosive gases, good thermal stability, smoke small, cheap and so on. Magnesium hydroxide and Aluminum hydroxide are the most widely used fire retardants. Magnesium hydroxide are greener than Aluminum hydroxide. The thermal decomposition temperature of the Magnesium hydroxide is 100 â ° C higher than that of the Aluminum hydroxide, reaching 330 â ° C, which is more conducive to raising the processing temperature, and the Magnesium hydroxide and acid are highly neutralized, it can quickly neutralize the acidic gases produced during the combustion process, such as CO2, SO2, Nox, and so on, and has a high decomposition ability, which helps to absorb the heat of combustion and improve the flame Magnesium hydroxide efficiency The Magnesium hydroxide has low hardness and strong smoke suppression.
Compared with organic flame retardants, inorganic flame retardants have the advantages of good thermal stability, non-precipitation, non-volatilization, low toxicity of flue gas, low cost and abundant available resources. At the same time, there are also some disadvantages such as low binding force, poor compatibility, large filling amount and great influence on the processing and mechanical properties of the polymer. Therefore, the inorganic flame retardant and organic flame retardant compound or mixed use can achieve the desired results.