CHALCO aluminium hydroxide is a reliable industrial material. It is clean, white, and consistent. It supports safer, halogen-free formulations. Many engineers choose CHALCO aluminium hydroxide for stability and supply assurance.
What Is CHALCO Aluminium Hydroxide?
Aluminium hydroxide is Al(OH)3. It is also called aluminium trihydrate(ATH). In the market, CHALCO aluminium hydroxide stands for large-scale production and stable quality. It works as a flame retardant filler. It also works as a functional additive and a precursor for alumina chemicals.
Why Choose CHALCO Aluminium Hydroxide?
Consistent particle size. Low impurities. Good whiteness. These traits matter for compounding and processing. CHALCO aluminium hydroxide also offers dependable logistics and batch traceability. You get steady supply and repeatable performance.
Key Benefits
- Halogen-free flame retardancy. Water is released on heating. Heat is absorbed. Smoke is reduced.
- Good whiteness and brightness. Suitable for white or light-colored compounds.
- Low Na2O content. Better electrical properties for wire and cable.
- Multiple particle sizes and surface treatments. Easier dispersion. Lower viscosity.
- Competitive cost per performance. Widely available from CHALCO.
Specification
| Specification | Chemical Composition % | PH | Oil absorption | Whiteness ≥ | Particle Grade | Attached Water %≤ | |||||
| Al(OH)3≥ | SiO2≤ | Fe2O3≤ | Na2O≤ | ml/100g≤ | Medium Particle Size | 100 % | 325 | ||||
| D50 µm | % | ||||||||||
| H-WF-1 | 99.5 | 0.08 | 0.02 | 0.3 | 7.5-9.8 | 55 | 97 | ≤1 | 0 | ≤0.1 | 0.5 |
| H-WF-2 | 99.5 | 0.08 | 0.02 | 0.4 | 50 | 96 | 1-3 | 0 | ≤0.1 | 0.5 | |
| H-WF-5 | 99.6 | 0.05 | 0.02 | 0.25 | 40 | 96 | 3-6 | 0 | ≤1 | 0.4 | |
| H-WF-7 | 99.6 | 0.05 | 0.02 | 0.3 | 35 | 96 | 6-8 | 0 | ≤3 | 0.4 | |
| H-WF-8 | 99.6 | 0.05 | 0.02 | 0.3 | 33 | 96 | 7-9 | 0 | ≤3 | 0.4 | |
| H-WF-10 | 99.6 | 0.05 | 0.02 | 0.3 | 33 | 96 | 8-11 | 0 | ≤4 | 0.3 | |
| H-WF-10-LS | 99.6 | 0.05 | 0.02 | 0.2 | 33 | 96 | 8-11 | 0 | ≤4 | 0.3 | |
| H-WF-10-SP | 99.6 | 0.03 | 0.02 | 0.2 | 7.5-9.0 | 32 | 95 | 8-11 | 0 | ≤4 | 0.3 |
| H-WF-12 | 99.6 | 0.05 | 0.02 | 0.3 | 32 | 95 | 10-13 | 0 | ≤5 | 0.3 | |
| H-WF-14 | 99.6 | 0.05 | 0.02 | 0.3 | 32 | 95 | 13-18 | 0 | ≤12 | 0.3 | |
| H-WF-14-SP | 99.6 | 0.03 | 0.02 | 0.2 | 30 | 95 | 13-18 | 0 | ≤12 | 0.3 | |
| H-WF-20 | 99.6 | 0.05 | 0.02 | 0.25 | 7.5-9.8 | 32 | 95 | 18-25 | 0 | ≤30 | 0.2 |
| H-WF-20-SP | 99.6 | 0.03 | 0.02 | 0.2 | 7.5-9.8 | 30 | 94 | 18-25 | 0 | ≤30 | 0.2 |
| H-WF-25 | 99.6 | 0.05 | 0.02 | 0.3 | 32 | 95 | 22-28 | 0 | ≤35 | 0.2 | |
| H-WF-40 | 99.6 | 0.05 | 0.02 | 0.2 | 33 | 95 | 35-45 | 0 | - | 0.2 | |
| H-WF-50-SP | 99.6 | 0.03 | 0.02 | 0.2 | 7.5-10 | 30 | 93 | 40-60 | 0 | - | 0.2 |
| H-WF-60-SP | 99.6 | 0.03 | 0.02 | 0.2 | 30 | 92 | 50-70 | 0 | - | 0.1 | |
| H-WF-75 | 99.6 | 0.05 | 0.02 | 0.2 | 40 | 93 | 75-90 | 0 | - | 0.1 | |
| H-WF-75-SP | 99.6 | 0.03 | 0.02 | 0.2 | 30 | 92 | 75-90 | 0 | - | 0.1 | |
| H-WF-90 | 99.6 | 0.05 | 0.02 | 0.2 | 40 | 93 | 70-100 | 0 | - | 0.1 | |
| H-WF-90-SP | 99.6 | 0.03 | 0.02 | 0.2 | 30 | 91 | 80-100 | ||||
Note: Values are indicative. Please confirm current specifications for your selected CHALCO aluminium hydroxide grade.
Typical Applications of CHALCO Aluminium Hydroxide
Wire & cable compounds. Use CHALCO aluminium hydroxide in EVA, PE, and PVC systems. It improves flame retardancy and smoke suppression. It supports low toxicity and RoHS compliance.
Thermoset resins. In unsaturated polyester and epoxy, ATH provides FR performance and filler function. Solid surface and artificial marble need high whiteness. CHALCO aluminium hydroxide fits well.
Rubber and elastomers. For silicone rubber and NBR, the filler balances mechanical strength and FR ratings. Process at moderate temperature for best results.
Coatings and adhesives. ATH adds matting, anti-settling, and FR behavior in specialized systems. It also enhances arc resistance in electrical coatings.
Water treatment and alumina salts. Aluminium hydroxide is a precursor for aluminum sulfate, PAC, and other coagulants. CHALCO aluminium hydroxide ensures a clean source.
Ceramics and polishing powders: After calcination, it produces high-quality calcined alumina, widely used in ceramics and abrasives.
How CHALCO Aluminium Hydroxide Works as a Flame Retardant
At ~200–220 °C, aluminium hydroxide decomposes. It releases water vapor. It absorbs heat. The polymer cools and chars. Smoke and toxic gases fall. This is why CHALCO aluminium hydroxide is popular in halogen-free systems.
Selecting the Right Grade
Particle size. Fine grades (D50 ≈ 1–3 µm) improve surface finish and mechanicals. Coarser grades (D50 ≈ 10–20 µm) reduce viscosity and cost. Choose based on your process and surface requirements.
Surface treatment. Silane or stearate treatments can lower compound viscosity. They improve filler-polymer compatibility. Untreated CHALCO aluminium hydroxide suits many systems and offers maximum FR effect.
Processing temperature. Keep melt temperature below ATH decomposition. Aim for ≤190 °C when possible. For higher-temperature polymers, consider magnesium hydroxide.
Loading level. Typical FR loadings are 40–65 phr. Balance LOI, mechanical strength, and flow. Pilot trials help you fix the final formula.
Electrical properties. Low Na2O and low moisture support insulation resistance. Specify tight limits for cable compounds.
Processing Tips for Compounding
Dry the filler if moisture is a concern. Keep the hopper and feeding zone clean. Use proper screw design to ensure dispersion. Avoid long residence times at high temperature. Maintain uniform cooling to prevent surface defects.
Regulatory and Compliance
CHALCO aluminium hydroxide supports halogen-free design. It can help meet RoHS and REACH goals. Always verify grade-specific certificates and test reports for your product and market.
CHALCO Aluminium Hydroxide vs Alumina
Some customers compare aluminium hydroxide vs alumina when choosing materials. Aluminium hydroxide works well as FR filler and chemical precursor. Alumina offers hardness and thermal resistance for ceramics and polishing. Both materials can complement each other in an industrial supply chain.
Quality, Supply, and Service
Stable batches reduce downtime. Predictable viscosity improves cycle time. CHALCO aluminium hydroxide offers both. Ask for a certificate of analysis with each lot. Keep safety data sheets and handling guides on file.
How to Specify CHALCO Aluminium Hydroxide
- Target polymer and process (EVA cable, UPR sheets, epoxy casting, etc.).
- Required FR level (UL-94, LOI, smoke density, etc.).
- Desired particle size and surface treatment.
- Electrical and color requirements.
- Compliance and documentation needs.
Frequently Asked Questions
Is CHALCO aluminium hydroxide suitable for halogen-free cable compounds?
Yes. CHALCO aluminium hydroxide is widely used in EVA/PE HFFR compounds. It provides flame retardancy and smoke suppression with low toxicity.
What loading level should I start with?
Begin at 50–60 phr for EVA or UPR. Adjust based on LOI, tensile, and processability. Finer grades can raise strength. Treated grades can lower viscosity.
Can CHALCO aluminium hydroxide replace antimony trioxide?
They work differently. Antimony is a synergist for halogen systems. CHALCO aluminium hydroxide is a primary halogen-free FR filler. Many modern designs remove antimony and halogens and use ATH instead.
What is the shelf life?
Store in a dry place, closed bags, and on pallets. Use first-in, first-out. Under proper storage, one year is typical. Check the bag label for your batch.
Does CHALCO aluminium hydroxide affect color?
It is highly white. It can improve brightness in many systems. Match the particle size to your surface finish target.
Call to Action
Need a consistent, halogen-free filler? Choose CHALCO aluminium hydroxide today. Contact us to request samples, COA, and technical data. Our experts can recommend the most suitable particle size (D50) and surface treatment for your application.
