Application of high mesh brucite powder in PVC energy cables
Brucite powder, as a non-metallic mineral with high magnesium content, has shown excellent application potential in PVC energy cables due to its unique physical and chemical properties. This article will explore the application of high-mesh brucite powder in PVC energy cables and how it improves the performance of cables.
Characteristics of brucite powder
Brucite powder, with the chemical formula of Mg(OH)2, is a layered hydroxide. It has the characteristics of high whiteness, good flaking, strong adhesion and basically no water absorption. These characteristics make it an ideal additive for PVC cables. The flame retardant properties of brucite powder are particularly outstanding. Its thermal decomposition and dehydration temperature is between 420 and 520℃, which is close to the combustion temperature of general items. Therefore, it can be used as a fire retardant coating and flame retardant.
Preparation of high-mesh brucite powder
High-mesh brucite powder is prepared by physical grinding, which can effectively improve the fineness and uniformity of the powder. The particle size of high-mesh brucite powder can be accurately measured by a laser particle size analyzer to ensure its optimal dispersibility and compatibility in PVC cables.
Application in PVC energy cables
In PVC energy cables, the addition of high-mesh brucite powder can significantly improve the flame retardant properties of cables. Studies have shown that the combination of brucite powder and high-mesh hydromagnesite powder can improve the flame retardant properties of PVC composite materials, and the maximum smoke density and smoke density level decreased by 33.6% and 42.9%, respectively. At the same time, this compounding can also effectively improve the thermal stability of PVC energy wires and cables, and the initial degradation temperature and the temperature at 50% pyrolysis increased by 5.3% and 56.5%, respectively, and can greatly increase the residual carbon rate after combustion.
Improved performance of modified PVC energy cables
The addition of high-mesh brucite powder not only improves the flame retardant properties of PVC energy cables, but also improves the mechanical properties of cables. Due to the high reactivity of brucite powder, it can decompose faster when the material burns, absorb heat, release water, and form a magnesium oxide coating on the surface of the material, thereby improving the flame retardant effect. In addition, the degree of ordering of the carbon residue after combustion of the modified cable is effectively improved, making the carbon residue more dense and continuous, which can not only effectively resist the transfer of heat flow, mass flow and air flow, but also promote the condensation of MgO on the surface of the carbon residue, effectively improving the physical barrier effect.
As a green and environmentally friendly natural product, the application of high-mesh brucite powder in PVC energy cables not only improves the flame retardant properties of the cables, but also improves the thermal stability and mechanical properties of the cables. With the growing demand for environmentally friendly flame retardant materials, the application prospects of high-mesh brucite powder will be broader, providing a new solution for the high performance of PVC energy cables.