3-Micron Magnesium Hydroxide

The 3-micron magnesium hydroxide produced by Taixing is a precise particle size halogen-free flame retardant manufactured for the global mid-range manufacturing industry due to the imbalance between flame retardant performance and processing efficiency, cost pressure and compliance requirements. It is widely suitable for large-scale application scenarios such as home appliance manufacturing, general rubber and plastic, wire and cable, building materials, and environmental governance, and has become the core product of the mid-range flame retardant market.

Core strengths

1. Collaborative flame retardant system

-High temperature stable adaptation: starting decomposition temperature of 343 ℃ (peak decomposition temperature of 441 ℃), perfectly matching the processing temperature range (170-270 ℃) of general polymer materials such as PP, PE, PVC, EVA, etc., to avoid premature decomposition failure during processing. The unit mass heat absorption reaches 1365J/g, which can quickly absorb combustion heat and block chain reactions, providing reliable safety protection for buildings, cables and other scenarios;

-Low smoke, non-toxic and environmentally friendly: It does not contain restricted substances such as halogens, heavy metals, polycyclic aromatic hydrocarbons, etc. When burned, it only releases clean water vapor, and does not emit toxic gases and corrosive substances such as hydrogen halides and dioxins. The smoke density ratio (SDR) is ≤ 82, and the smoke toxicity reaches GB/T 20284-2006 ZA1 level, without the need for additional smoke suppressants. The single raw material achieves the triple effect of "flame retardant+smoke suppressant+non-toxic", suitable for densely populated places and environmentally friendly areas;

-Dense barrier protection: By using gradient grading purification technology to shape a regular hexagonal plate-like crystal structure (diameter to thickness ratio of 8:1), the density of the decomposed magnesium oxide ceramic layer is increased by 58%. The structural integrity can be maintained for ≥ 125 minutes in a 1000 ℃ flame environment, effectively blocking the transfer of heat, oxygen, and combustible gases, while suppressing droplet phenomena, significantly improving the flame retardant reliability of the material.

2. Precise particle size modification technology

-Accurate and controllable particle size: Strictly control the particle size distribution (D50=3μm±0.2μm，D90≤4.9μm，D10≥1.8μm) to avoid the problem of agglomeration of nanoscale powders and uneven dispersion of large particle size (≥5μm) products, scratching the mold, etc. The dispersion uniformity in the polymer matrix is ≥ 97%, ensuring that the appearance of the product is smooth, free of pitting, and the performance is uniform and stable;

-Strong processing adaptability: The oil absorption value is as low as 24mL/100g, which is 12% lower than traditional 3-micron products. It can significantly improve the melt flow rate (MFR) of composite materials by more than 38%, reduce equipment torque and energy consumption during extrusion and injection molding processes (measured energy-saving of 25%), reduce mold wear, and adapt to high-speed production lines for large-scale production (screw speed ≤ 650rpm), greatly improving production efficiency;

-Interface bonding enhancement: After modification with silane stearic acid composite coupling agent, the activity index is ≥ 98.5%, the contact angle reaches 156 °, and the surface changes from strong hydrophilic to hydrophobic oleophilic, forming stable interface bonding with PP, PE, PVC, EVA and other substrates, effectively alleviating the negative impact of fillers on the mechanical properties of substrates. In the PP system with 50wt% filling, the tensile strength can reach 19.2MPa and the impact toughness can reach 5.1kJ/m2, which is 18% higher than the unmodified product.

3. Multi scenario application adaptation

-Customization of segmented scenarios: Based on a core particle size of 3 microns, we offer four major segmented models: "cable specific", "rubber specific", "building materials specific", and "environmental protection specific"

-Cable specific type: halogen content ≤ 0.004%, vertical combustion reaches FV-0 level (1.6mm), suitable for the production of low smoke halogen-free cable materials;

-Rubber specific type: Activation index ≥ 99%, excellent compatibility with TPE and EPDM, retention rate of elongation at break ≥ 85%;

-Special type for building materials: whiteness ≥ 97.5%, strong weather resistance, suitable for fireproof boards and flame-retardant coatings;

-Environmental specific type: Heavy metal adsorption efficiency ≥ 96%, neutralization efficiency of acidic wastewater ≥ 99%, suitable for environmental protection treatment scenarios;

-Functional upgrade options: Provide weather resistant (-55℃-225℃ stable performance), low dust (dust flying amount ≤ 1.1mg/m ³, in compliance with OSHA standards), high whiteness (whiteness ≥ 98%) and other functional products to meet personalized needs in different scenarios.

Application field

1. In the field of wires and cables

-Low smoke and halogen-free cable material: used for insulation and sheath materials of building cables, power cables, and communication cables. Adding 52% -55% can meet the GB/T 19666-2023 low smoke and halogen-free standard, with vertical combustion reaching FV-0 level (1.6mm), smoke density level ≤ 80, no toxic gas release, ensuring personnel evacuation and smooth communication in case of fire, and adapting to high-temperature extrusion processing technology (200-260 ℃) without premature decomposition problems;

-General cable flame retardant modification: used for flame retardant filling of PVC and EVA cable materials. When combined with zinc borate, it can reduce the amount of single flame retardant added (by 10% -15%), while improving the processing flowability and mechanical properties of cable materials. The tensile strength is ≥ 12MPa, the elongation at break is ≥ 300%, and there is no performance degradation after salt spray and wet heat cycle testing (500 hours). It is suitable for industrial cables, home appliance wiring and other scenarios.

2. Rubber and engineering plastics field

-General plastic modification: used for the production of household appliance shells, automotive interior parts, plastic pipes, plastic trays and other general plastics such as PP, PE, PVC, etc. Adding 48% -52% can achieve UL94 V0 level flame retardancy, mechanical property retention rate ≥ 93%, tensile strength can reach 19.2MPa, impact toughness can reach 5.1kJ/m2, suitable for large-scale injection molding and extrusion production lines, and production efficiency can be improved by more than 35%;

-Flame retardant rubber products: used for EPDM, NBR, natural rubber and other rubbers to produce flame-retardant conveyor belts, seals, rubber pipes, flame-retardant rubber pads and other products. Adding 45% -50% can achieve efficient flame retardancy while retaining the elasticity and wear resistance of the rubber. The Shore hardness (A) remains between 65-75, the tensile rebound rate is ≥ 90%, and there is no cracking or hardening phenomenon after aging testing (100 ℃ × 72 hours). It is suitable for industrial transportation, building sealing and other scenarios.

3. Building materials field

-Fireproof board: used for building boards such as fireproof gypsum board, glass magnesium board, flame-retardant density board, flame-retardant plywood, etc. Adding 40% -45% can make the flame-retardant grade of the board reach GB 8624-2012 B1 level (flame retardant grade), with a fire resistance time of ≥ 1.8 hours. When exposed to fire, it forms a dense flame-retardant protective layer, delays the spread of fire, and improves the mechanical strength (bending strength ≥ 8MPa) and moisture resistance (water absorption expansion rate ≤ 3%) of the board. It is suitable for public places such as high-rise buildings, shopping malls, hospitals, schools, etc;

-Flame retardant coating: used for steel structure fireproof coating and decorative fireproof coating, adding 35% -40% can enhance the flame retardant durability of the coating, with a fire resistance time of ≥ 2h, forming an expanded carbon layer thickness of ≥ 15mm, low smoke density, no toxic gas release, in line with the national standard GB 14907-2022 "Steel Structure Fireproof Coating", suitable for fire protection of steel structures such as industrial plants, high-rise buildings, bridges, etc;

-Thermal insulation material modification: Used for flame retardant modification of EPS, XPS insulation board, and extruded board. Adding 30% -35% can make the flame retardant level of the insulation board reach B1 level, while retaining excellent thermal insulation performance (thermal conductivity ≤ 0.039W/(m · K)), without affecting the forming and cutting performance of the board, suitable for the insulation and fire prevention needs of building exterior walls, cold storage, and cold chain logistics.

4. Environmental governance field

-Acidic wastewater treatment: used for the treatment of acidic wastewater in industries such as chemical, metallurgical, electroplating, and mining. As an efficient neutralizing agent, it has a neutralization efficiency of ≥ 99% for acidic substances such as sulfuric acid, hydrochloric acid, and nitric acid. It can quickly adjust the pH value of the wastewater to 6.5-8.5, while adsorbing heavy metal ions such as lead, cadmium, mercury, and chromium with an adsorption efficiency of ≥ 96%. The treated wastewater meets the first level discharge standard of GB 8978-1996, and the sludge production is reduced by 40% compared to traditional lime method;

-Flue gas desulfurization: used for desulfurization treatment of flue gas in power plants, boilers, chemical kilns, etc. It reacts with sulfur dioxide to generate stable magnesium sulfate with a desulfurization efficiency of ≥ 92%. Compared with traditional limestone desulfurization process, the amount of desulfurizer used is reduced by 25%. The generated desulfurization slag can be recycled for building materials (such as brick making and paving), reducing environmental treatment costs and solid waste disposal pressure;

-Soil improvement: Used for acidic soil improvement (pH ≤ 5.5), it can adjust the soil pH value to 6.0-7.5, supplement magnesium element (an essential nutrient for plants) in the soil, promote plant root growth and nutrient absorption, while adsorbing heavy metal ions in the soil, reducing soil pollution risk, suitable for farmland, orchards, vegetable greenhouses, tea gardens and other scenarios, and can increase crop yield by 10% -15%.

Frequently Asked Questions (FAQ)

What is the core difference between 3-micron magnesium hydroxide and nanoscale, large particle size (≥ 5 μ m) magnesium hydroxide?

A1: Core difference ① Compared with nanoscale (D50 ≤ 0.5 μ m): 3-micron products have no agglomeration problems, better processing flowability, no need to add additional dispersants, and a comprehensive production cost reduction of more than 32%, making them more suitable for large-scale production scenarios; ② Compared with larger particle sizes (≥ 5 μ m), 3-micron products have higher dispersion uniformity (≥ 97% vs ≤ 85%), lower oil absorption value (24mL/100g vs ≥ 30mL/100g), less impact on the mechanical properties of the substrate (18% increase in impact toughness), and will not scratch the mold, making them suitable for high-precision product production.

If you are looking for 3-micron magnesium hydroxide and precise particle size magnesium hydroxide, Taixing will be your best partner. Welcome to negotiate and connect!