Granular Aluminum Hydroxide

The granular aluminum hydroxide produced by Taixing is produced to address the shortcomings of traditional powdered ATH, such as severe dust pollution, high transportation loss, and uneven mixing and dispersion. It is widely suitable for large-scale automated production scenarios such as flame retardant masterbatch granulation, building material castables, cable material extrusion, and composite material molding, and has core advantages such as low dust, high fluidity, smoke suppression, and flame retardancy.

Core strengths

1. Low dust clean production, compatible with automated production lines

-Extremely low dust: particle density ≥1.8g/cm³, smooth surface without powdering, dust flying amount ≤ 0.5mg/m ³, far below OSHA occupational health and safety standards (≤ 5mg/m ³), can be directly connected to automated pneumatic conveying systems, reducing workshop dust concentration by more than 90%, reducing equipment pipeline blockage and worker occupational health risks;

-High fluidity and easy measurement: Particle sphericity ≥ 0.85, angle of repose ≤32°, excellent fluidity, suitable for automatic measuring scales, twin-screw granulators and other automated equipment, measurement accuracy error ≤ ± 0.2%, avoiding powder layering, bridging and other problems, improving production efficiency and product batch stability;

-Extremely low transportation loss: The particle structure is dense, and the wear rate during pipeline transportation and mechanical mixing is ≤ 0.1%. Compared with powdered ATH (loss rate of 5% -8%), it significantly reduces material waste and directly lowers the raw material procurement and production costs of downstream enterprises.

2. Dual phase synergistic flame retardant mechanism

-Accurate heat absorption and flame retardancy: The initial decomposition temperature is 220 ℃ (peak decomposition temperature is 280 ℃), perfectly matching the process range of medium and low temperature processing of polymer materials such as EVA, PVC, PE, etc. The heat absorption per unit mass reaches 1967J/g, which can quickly absorb combustion heat and release water vapor, block the chain reaction of combustion, and provide reliable safety protection for scenarios such as cables and building materials;

-Dense carbon layer barrier: The decomposed aluminum oxide (Al₂O₃) can form a continuous and dense ceramic protective layer on the surface of the substrate, increasing the density by 55%. It maintains structural integrity for ≥ 100 minutes in a flame environment at 800 ℃, effectively blocking the transfer of heat, oxygen, and combustible gases, while suppressing the phenomenon of melting droplets, completely eliminating the risk of secondary fires;

-Halogen free, non-toxic and environmentally friendly: It does not contain harmful ingredients such as halogens, heavy metals, antimony, etc., and does not release toxic gases such as hydrogen halides and dioxins during combustion. The smoke density ratio (SDR) is ≤ 75, and the smoke toxicity reaches GB/T 20284-2006 ZA1 level.

3. Surface modification enhances compatibility

-Strong interface adhesion: After modification, the active groups on the surface of the particles form stable chemical bonds with the molecular chains of the substrate. In the EVA system with a 45% filling amount, the tensile strength can reach 15.2 MPa, the elongation at break is ≥ 350%, and the mechanical property retention rate is ≥ 90%, which is more than 25% higher than that of unmodified particles;

-Excellent processing flowability: The oil absorption value is as low as 18mL/100g, which is 20% lower than traditional powder ATH. It can significantly increase the melt flow rate (MFR) of composite materials by more than 40%, reduce equipment torque and energy consumption during extrusion, granulation, and molding processes, reduce mold wear, and adapt to high-speed automated production lines;

-Outstanding weather resistance: The modified granular ATH has excellent acid and alkali resistance, as well as moisture and heat resistance. After being placed in a humid and hot environment at 85 ℃/85% RH for 1000 hours, its flame retardant and mechanical properties remain unchanged, making it suitable for long-term exposure scenarios such as outdoor building materials and cable sheaths.

Application field

1. Flame retardant masterbatch manufacturing field

-High filling flame retardant masterbatch: used for large-scale production of EVA, PE, PVC flame retardant masterbatch. The granular ATH has good flowability and is easy to measure, with a filling amount of up to 45% -50%. The resulting masterbatch has uniform particle size and no dust pollution. It can be directly connected to downstream plastic modification production lines without the need for additional dust removal equipment, increasing production efficiency by more than 30%. It is widely used for flame retardant modification of films, pipes, and injection molded parts;

-Functional composite master batch: successfully compounded with antioxidant and light stabilizer, it can composite master batch. The granular structure avoids the layering of additives, and the performance of master batch is uniform and stable. When added to polymer materials, it can simultaneously realize the dual functions of flame retardant and anti-aging, reduce the complexity of formula, and reduce the production cost of enterprises.

2. Building materials field

-Fireproof casting material: used in the production of steel structure fireproof casting material and tunnel fireproof coating. The granular ATH has high strength and excellent fluidity, and is evenly mixed with cement, resin and other substrates. After casting, there is no hollowing or cracking, and the fire resistance time is ≥ 3 hours. The formed carbon layer is dense and hard, effectively protecting the steel structure from high temperature damage;

-Flame retardant board: used in the production of glass magnesium board, calcium silicate board, and flame retardant density board. The granular ATH has good dispersibility, and the addition of 35% -40% can make the flame retardant grade of the board reach B1 level, while improving the moisture resistance and mechanical strength of the board (bending strength ≥10MPa), and adapting to the fire protection requirements of high-rise buildings, commercial areas, hospitals and other public places;

-Modification of insulation materials: Used for flame retardant modification of EPS and XPS insulation boards. The granular ATH has good compatibility with the insulation material matrix and does not affect the foam structure. Adding 30% can make the insulation board flame retardant level reach B1 level, with a thermal conductivity coefficient of ≤0.039W/(m·K), and has both flame retardant and insulation properties. It is widely used in building exterior wall insulation systems.

3. In the field of wires and cables

-Low smoke and halogen-free cable material: used for the production of insulation and sheath materials for wires and cables. The granular ATH dust is low and has excellent dispersibility. The addition amount of 35% -40% can meet the GB/T 19666-2019 low smoke and halogen-free standard. The vertical combustion can reach FV-0 level, the smoke density level is ≤70, and there is no toxic gas release during combustion. It ensures smooth evacuation and communication for personnel in case of fire, and is suitable for scenarios such as rail transit and building wiring;

-Flame retardant modification of mining cables: used for flame retardant filling of mining rubber sheathed cables. The granular ATH has good compatibility with the rubber matrix, excellent wear resistance, and aging resistance. It has passed salt spray and wet heat cycle tests without any performance degradation, and its service life is extended by more than twice in harsh underground environments.

4. In the field of composite materials

-Flame retardant modification of fiberglass reinforced plastic (FRP): used for the compression molding of FRP composite materials. The granular ATH has good compatibility with resin, and the addition of 30% -35% can make the flame retardant grade of FRP products reach UL94 V0 level, while improving the corrosion resistance and mechanical strength of the products (tensile strength ≥ 80MPa). It is widely used in products such as wind turbine blades, yacht shells, chemical equipment shells, etc;

-Unsaturated polyester resin flame retardant: used for flame retardant modification of unsaturated polyester resin. The granular ATH is easy to disperse and has no precipitation. The resin adhesive produced has good stability, and the cured product has no bubbles or defects. It has excellent flame retardant performance and is suitable for the production of handicrafts, sanitary ware, and decorative materials.

Frequently Asked Questions (FAQ)

Q1: What is the core difference between granular aluminum hydroxide and powdered aluminum hydroxide?

A1: Core difference: ① Dust control: For granular products, the dust flying amount is ≤ 0.5mg/m ³, ensuring clean production without pollution. For powdered products, dust pollution is severe and additional dust removal equipment is required; ② Transportation and Measurement: Granular products have good fluidity and precise measurement, suitable for automated production lines. Powdered products are prone to bridging and layering, resulting in large measurement errors; ③ Comprehensive cost: The transportation loss of granular products is ≤ 0.1%, which reduces material waste by 5% -8% compared to powdered products. At the same time, it saves investment and maintenance costs of dust removal equipment, and reduces the comprehensive cost of long-term use by 15% -20%; ④ Performance: The modified granular product has better compatibility with the substrate and higher retention rate of mechanical properties.

Q2: How to determine the daily addition amount of granular aluminum hydroxide in different substrates?  

A2: The amount of addition should be combined with the substrate type, product thickness, and target flame retardant level. Conventional reference: ① EVA flame retardant masterbatch: 45% -50%; ② Cable material: 35% -40%; ③ Fireproof castable: 30% -35%; ④ Fiberglass composite material: 30% -35%.

If you are looking for high-quality granular aluminum hydroxide, low dust ATH, halogen-free flame retardant masterbatch special aluminum hydroxide, and automated production line flame retardant, Taixing will be your best partner. We will provide the lowest price cooperation. Welcome to negotiate!