Aluminum Hydroxide (ATH), also known as Alumina Trihydrate, is one of the most widely used inorganic flame retardant fillers in the plastics and rubber industries. 

Due to its non-toxic, halogen-free and environmentally friendly properties, ATH has become an important material for manufacturing low smoke and low toxicity products, 

especially in applications where safety and fire resistance are essential.

At Weifang Wanfeng New Material Technology Co., Ltd., we manufacture high-purity Aluminum Hydroxide using carefully selected raw materials and advanced 

production technology. 

With stable particle size distribution, high whiteness, and excellent dispersion performance, our ATH products are designed to meet the strict requirements of modern

 polymer compounding.

Flame Retardant Mechanism

ATH functions as a physical flame retardant. When exposed to high temperatures (around 200–220°C), Aluminum Hydroxide decomposes endothermically

 and releases chemically bound water vapor. 

This process absorbs a large amount of heat from the combustion surface and lowers the temperature of the material. At the same time, the released water vapor

 dilutes oxygen and combustible gases, helping to suppress flame propagation.

After decomposition, a layer of aluminum oxide (Al₂O₃) is formed on the surface of the material, which acts as a protective barrier. This residue further isolates heat 

and oxygen, effectively preventing the spread of fire and reducing smoke generation.

Key Advantages

• Halogen-free and environmentally friendly

• Low smoke emission and low toxicity

• Excellent electrical insulation properties

• High whiteness and good surface appearance

• Good compatibility with polymer systems

• Cost-effective flame retardant solution

Typical Applications

Our Aluminum Hydroxide is widely used in various polymer and industrial fields:

Wire & Cable Compounds
Especially suitable for LSZH (Low Smoke Zero Halogen) cable materials based on EVA, PE and PVC replacement systems.

Rubber and Elastomers
Used in conveyor belts, sealing materials, and rubber sheets to improve flame resistance and safety performance.

Thermosetting Resins
Applied in unsaturated polyester (UP), epoxy resin, and phenolic resin systems, commonly used in fiberglass reinforced plastics (FRP) and construction panels.

Plastic Products
Used in injection molding and extrusion products such as household appliances, electrical housings, and building materials.

Artificial Stone & Solid Surface Materials
ATH is a key mineral filler in acrylic solid surfaces and engineered stone due to its high whiteness and surface finish.

Quality Assurance

With three production bases in China, Wanfeng ensures consistent supply and stable quality. We provide customized particle size ranges, surface-treated grades, and technical support according to customer processing conditions and equipment requirements.

We are committed to providing reliable flame retardant solutions and long-term cooperation for global polymer manufacturers.

If you are looking for a stable and professional supplier of Aluminum Hydroxide flame retardants, please feel free to contact our technical and sales team for further information.