Advantages of chemical magnesium hydroxide in the application of wires, cables and PVC films
Publish Time: 2024-09-19
Magnesium hydroxide (MH), as an important inorganic compound, has shown broad application prospects in the chemical industry, especially in the fields of wires and cables and PVC films. This article will focus on the unique advantages and application value of ultrafine magnesium hydroxide with D50=1μm in these fields after high surface modification.1. Basic characteristics of magnesium hydroxideMagnesium hydroxide has the advantages of high chemical purity, good suspension performance, convenient application and distribution, and uniform particle size distribution (such as D50=1μm), good compatibility with the substrate, and little effect on the mechanical properties of the product. In addition, magnesium hydroxide also has a low hydration rate, certain activity and adhesion, odorless, tasteless, non-toxic, and is an environmentally friendly green material.2. The importance of surface modificationAlthough magnesium hydroxide has many advantages, its high surface polarity makes it easy for particles to agglomerate. Direct addition to polymer materials will affect its dispersibility and compatibility, and thus affect the processing and mechanical properties of the material. Therefore, through surface modification technology, such as the use of modifiers such as silane coupling agents and stearic acid, the surface properties of magnesium hydroxide can be effectively improved, so that it can be transformed from hydrophilic to lipophilic, and the dispersibility and compatibility in polymer materials can be improved.3. Application advantages in wires and cablesExcellent flame retardant properties: Magnesium hydroxide has a high decomposition temperature, can decompose hydroxide ions at high temperatures, capture free radicals in the combustion process, and terminate flame propagation. At the same time, the generated magnesium oxide refractory layer can effectively isolate the air in the combustion area and further prevent combustion. This feature makes magnesium hydroxide an ideal flame retardant in wires and cables, which can significantly improve the flame retardant properties of wires and cables and reduce the occurrence of fire accidents.Environmental protection: Magnesium hydroxide has no harmful substances emitted during production, use and disposal, and can also neutralize the acidic and corrosive gases generated during combustion. It is an environmentally friendly green flame retardant. This meets the current social demand for environmentally friendly materials and is conducive to promoting the sustainable development of the wire and cable industry.Good processing performance: The surface-modified magnesium hydroxide has significantly improved dispersibility and compatibility in polymer materials, which is conducive to the processing and production of wires and cables. At the same time, the high processing temperature of magnesium hydroxide can speed up the extrusion speed, improve the plasticizing effect, and make the surface gloss of the product higher.4. Application advantages in PVC filmFlame retardant and smoke suppression effect: The application of ultrafine magnesium hydroxide (D50=1μm) in PVC film can partially replace traditional flame retardants such as antimony trioxide, which not only maintains good flame retardant properties, but also significantly reduces the smoke density level. Experiments show that with the increase of magnesium hydroxide addition, the smoke density level of PVC film gradually decreases, and the smoke suppression effect is significant.Improve mechanical properties: The surface-modified magnesium hydroxide is evenly dispersed in the PVC film and has good compatibility with the substrate, which can improve the mechanical properties of the film to a certain extent, such as tensile strength and tear strength.Reduce costs: The large filling amount of magnesium hydroxide can reduce the cost of materials while ensuring performance and improve the market competitiveness of products.Ultrafine magnesium hydroxide with D50=1μm, after high surface modification, shows significant application advantages in the fields of wires and cables and PVC films. Its excellent flame retardant properties, environmental friendliness, good processing properties and ability to improve mechanical properties make magnesium hydroxide an indispensable and important material in these fields. In the future, with the continuous advancement of technology and the continuous expansion of application fields, the application prospects of magnesium hydroxide will be broader.
