Five solutions to solve the problem of magnesium hydroxide dispersion in cable materials

1. Surface modification technology: The principle is to reduce the polarity of particles and enhance compatibility; the mainstream modification methods are silane coupling agent treatment, fatty acid coating, and plasma treatment; case data show that a cable material company uses silane coupling agent to modify magnesium hydroxide, and the tensile strength and oxygen index of the product are improved.

2. Optimize the dispersion process: The key process parameters include mixing temperature (twin-screw extruder temperature is controlled at 160-200℃), shear rate (screw speed is 300-500rpm and multi-stage shear design is adopted), and feeding sequence (first add the matrix resin for pre-plasticization, and then add modified magnesium hydroxide in batches); equipment upgrades are recommended to use a two-stage extruder and a static mixer.

3. Composite dispersant system: Synergistically enhance the effect by compounding different types of dispersants, such as wetting agent + coupling agent, ionic + non-ionic dispersant, and nano-assisted dispersion; experimental comparison shows that the dispersion uniformity score of magnesium hydroxide in EVA is improved when the PEG + titanate composite system is used.

4. Particle size and grading optimization: In terms of particle size control, the ideal particle size of magnesium hydroxide is 1-5μm, and the D50 is controlled at about 2.5μm. The grading design is to mix different particle sizes in proportion; the case effect shows that a company has increased the filling amount, maintained the tensile strength unchanged and reduced costs through grading optimization.

5. Online monitoring and intelligent control: Introduce real-time monitoring technology to adjust process parameters in time, including near-infrared spectroscopy monitoring, melt flow index monitoring, and machine learning models; benefit analysis shows that a certain intelligent production line has reduced product defective rate and energy consumption after adopting NIR + AI control.

Solving the problem requires a multi-pronged approach, and companies can choose a combination of solutions based on their own conditions; the recommended action is to contact material suppliers for modification evaluation or discuss process upgrade plans with equipment manufacturers. If you need a customized solution, you can leave a message to get support.