Green flame retardant technology: brucite powder enhances the environmental protection and performance of PU synthetic leather
Brucite powder (hydrated magnesium silicate, Mg2SiO4·nH2O) is a natural mineral. It has been widely used in various industrial fields because of its high thermal stability, good flame retardant properties and low cost. Especially in the synthetic materials industry, brucite powder is widely used as a halogen-free flame retardant in the manufacturing process of polyurethane (PU) synthetic leather.
Characteristics of brucite powder flame retardant
Environmental protection: Brucite powder is a halogen-free flame retardant that does not produce harmful gases when burned, meeting modern environmental protection requirements.
Stability: Brucite powder has high thermal stability. It decomposes at high temperature to produce water vapor and non-toxic magnesium oxide, which can absorb a lot of heat and reduce the surface temperature of the material.
Synergistic effect: When used in combination with other flame retardants such as phosphorus flame retardants, it can show good synergistic effects and improve the flame retardant effect.
Cost-effectiveness: Compared with other flame retardants, the cost of brucite powder is relatively low and has better economic benefits.
Application in PU synthetic leather
Manufacturing process
Dry method: directly mix brucite powder into PU resin and form synthetic leather by heating and drying.
Wet method: brucite powder can be dispersed in a solvent and mixed with PU resin, and then a film layer is formed by a wet process, and then synthetic leather is made through steps such as solidification and cleaning.
Coating method: a coating containing brucite powder is applied to the substrate and cured by heating to form a flame retardant layer.
Functional improvement
Improve flame retardancy: the water released by brucite powder during combustion can inhibit the spread of flames, and the magnesium oxide layer formed can isolate oxygen and further prevent combustion.
Enhance physical properties: adding brucite powder in an appropriate amount can improve the mechanical properties of PU synthetic leather, such as improving wear resistance and tear resistance.
Improve weather resistance: brucite powder helps to improve the weather resistance and aging resistance of synthetic leather and extend its service life.
Reduce smoke and toxic gas emissions: due to its halogen-free characteristics, the application of brucite powder can significantly reduce the smoke and toxic gases generated during combustion.
Application Cases
In the production of PU synthetic leather, by adding brucite powder in an appropriate proportion, products that meet specific flame retardant standards can be produced, such as flame retardant performance that reaches UL94 V-0 level.
Brucite powder can also be used in combination with other functional fillers to further enhance the comprehensive performance of synthetic leather, such as adding a small amount of glass fiber to improve strength and toughness.
As an environmentally friendly flame retardant, brucite powder has broad application prospects in PU synthetic leather. Through reasonable formula design and technical optimization, it can not only improve the safety performance of synthetic leather, but also enhance its comprehensive performance to meet the needs of different industries. With the growing demand for environmentally friendly materials, it is expected that the application of brucite powder in PU synthetic leather will become more extensive.