What are the factors related to the use of aluminum hydroxide?
The effect of high white filler aluminum hydroxide particle size on low smoke halogen-free flame retardant materials 1. The particle size of high white filler aluminum hydroxide is one of the important factors affecting low smoke halogen-free cable materials. Studies at home and abroad have shown that when the particle size D50 of high white filler aluminum hydroxide changes from nanoscale to 5 microns,
high white filleraluminum hydroxideEffect of Particle Size on Low Smoke Halogen-free Flame Retardant Material
1. The particle size of high white filler aluminum hydroxide is one of the important factors affecting the low smoke halogen-free cable material. Studies at home and abroad show that when the particle size D50 of high white filler aluminum hydroxide changes from nanometer to 5 microns, the limiting oxygen index of flame retardant polyolefin materials decreases parabolically. The smaller the particle size D50 of high white filler aluminum hydroxide products, the better the flame retardant effect. The smaller the particle size D50, the more difficult it is to disperse high white filler aluminum hydroxide in polymer materials and the easier it is to form agglomeration. The smaller the particle size D50, the lower the fluidity of the low-smoke halogen-free cable material. Therefore, it is recommended to choose and buy high white filler aluminum hydroxide, it is recommended to choose the particle size D50 between 1.2 microns and 2.0 microns.
2, when the high white filler aluminum hydroxide appears a very small number of particles with a particle size greater than 30 microns, these particles form stress concentration in the low smoke halogen-free cable material, which reduces the elongation at break of the material. Therefore, it is recommended to choose high white filler aluminum hydroxide, it is recommended to choose the maximum particle size of less than 12 microns or 10 microns.
3, it is worth noting that some domestic laser particle size analyzer manufacturers produced particle size analyzer measured particle size is small, in order to obtain the customer's favor; some domestic particle size analyzer has a correction procedure, does not conform to the normal distribution of the particle size results were discarded. Therefore, it is recommended that manufacturers of high-white filler aluminum hydroxide provide downstream customers with the particle size results measured by the Malvern particle sizer, and at the same time regularly observe the particle size and particle morphology of high-white filler aluminum hydroxide through SEM images.
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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
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