Magnesium hydroxide (MDH) is an environmentally friendly, halogen-free flame retardant widely used in polyamide (PA) compounds, such as PA6 and PA66, for electrical, electronic, and automotive applications. As global regulations increasingly restrict halogen-containing flame retardants, MDH has become a preferred solution for manufacturers seeking both fire safety and environmental compliance.

Excellent Flame Retardant Performance in PA

When exposed to high temperatures, magnesium hydroxide decomposes endothermically at around 330–340°C, absorbing heat and releasing water vapor. This mechanism effectively lowers the surface temperature of PA materials, dilutes combustible gases, and suppresses smoke generation. The residual magnesium oxide (MgO) forms a protective layer that further enhances thermal stability and char formation.

Designed for High-Temperature PA Processing

PA resins typically require high processing temperatures. Our magnesium hydroxide grades for PA applications are characterized by:

• High purity, ensuring stable flame retardant performance

• Fine and controlled particle size, enabling good dispersion in PA matrices

• Low impurity content, minimizing the impact on mechanical properties

• Optional surface-treated grades to improve compatibility and processing flow

These features make our MDH suitable for injection molding and extrusion of PA compounds.

Key Advantages in Polyamide Compounds

• Halogen-free and environmentally friendly

• Excellent heat absorption and smoke suppression

• Improved thermal stability of PA materials

• Suitable for PA6, PA66 and glass-fiber-reinforced PA systems

• Compliant with major environmental regulations

Typical Applications

• Electrical and electronic connectors

• Automotive under-the-hood components

• Cable ties and wire management systems

• Flame-retardant PA engineering parts

Customized Solutions from Wanfeng

With extensive experience in magnesium-based materials, Wanfeng offers customized magnesium hydroxide solutions tailored to different PA formulations and flame retardant requirements. Our technical team works closely with customers to optimize particle size, surface treatment, and loading levels to achieve the best balance between flame retardancy and mechanical performance.

For more information, technical data sheets, or sample requests, please feel free to contact us.