Particle size has a certain impact on the flame retardant effect of ammonium polyphosphate (APP).
Generally speaking, APP particles with smaller particle sizes have better flame retardant properties. This is because small particles can provide a larger specific surface area, increase the contact area with the flame, and improve the flame retardant effect.
Specifically, smaller APP particles can achieve the following effects: Rapidly generate gas phase: small particles quickly decompose in the flame to generate gas phase, forming a gas phase barrier layer to prevent the transfer of oxygen and heat energy and slow down the spread of flame. Increase the physical barrier effect: Small particles can form more physical barriers, wrap the surface of combustibles, block combustion reactions, reduce the contact and oxygen supply of combustibles, and prevent the fire from expanding. Promote gel formation: Small particles are sensitive to environmental humidity and easily absorb water to form gel, forming a protective layer attached to the surface of combustible materials, blocking oxygen and inhibiting combustion reactions.
Generally speaking, smaller APP particles can better increase the flame retardant effect, but too small particles may cause difficulty in handling and dispersion, affecting the application effect. Therefore, it is necessary to select an appropriate particle size range and particle size distribution for specific application requirements.
Shifang Taifeng New Flame Retardant Co., Ltd is a manufacturer with 22 years of experience specializing in the production of ammonium polyphosphate flame retardants,our prouducts are widely export to overseas.
Our product TF-201s has very fine particle size, it can be used in intumescent coatings,textile back coatings, plastics etc.
If you want to know more information, please contact us.
Contact:Cherry He
Email: sales2@taifeng-fr.com
Tel/What’s up:+86 15928691963
Post time: Nov-02-2023
