Why is your matte powder dispersion effect poor? It may be that these steps are not done correctly!

Why is your matte powder dispersion effect poor? It may be that these steps are not done correctly!

1. Preparation before use

Check the product status

Confirm that the matte powder dispersant is a uniform liquid without stratification or precipitation. If it is a solid powder, check whether it is damp and agglomerated.

Check the product technical data sheet (TDS) to clarify the applicable system (such as water-based, solvent-based), recommended dosage, pH range and other key parameters.

Confirm the applicable system

Paint/ink: It must be compatible with the resin system (such as acrylic, polyurethane, epoxy resin), and avoid mixing with strong acid/alkaline substances.

Plastic: It is necessary to confirm the temperature resistance of the dispersant (such as injection molding temperature) to avoid high temperature decomposition.

Cosmetics: It must comply with relevant regulations (such as EU cosmetics regulations) to ensure that there are no banned ingredients.

Prepare tools and equipment

Dispersing equipment: high-speed disperser, sand mill, three-roller machine, ultrasonic disperser, etc.

Measuring tools: electronic balance (accuracy 0.01g), pipette.

Protective equipment: masks, gloves, goggles (to prevent dust or liquid splashing).

2. Operation steps

1. Addition amount control

Recommended dosage:

Inorganic pigments (such as silica): 0.3%~2% (by weight of pigment)

Organic pigments (such as some matte powders): 2%~4%

Matte powder (such as extinction powder): 20%~40% (by weight of matte powder)

The specific dosage needs to be determined through a small test. Excessive dosage may cause the system viscosity to increase abnormally.

2. Addition order

Pre-dispersion method (recommended):

Pre-mix the matte powder with part of the dispersant and stir at low speed until wet.

Gradually add the remaining dispersant and disperse at high speed until there is no agglomeration.

Add the pre-dispersed slurry to the main system (such as coatings, plastic masterbatch).

Direct addition method:

Applicable to low viscosity systems (such as water-based inks). Add the dispersant directly to the main system, then add the matte powder and disperse at high speed.

3. Dispersion process

High-speed dispersion (paint/ink):

Speed: 1000~3000rpm (adjusted according to the viscosity of the system).

Time: 15~30 minutes, until the particle size distribution meets the standard (can be detected by the scraper fineness meter).

Grinding (high-demand system):

Use a sand mill or a three-roll mill to grind the particle size to less than 5μm (depending on the application requirements).

Ultrasonic dispersion (nano-matte powder):

Frequency: 20kHz, time: 5~10 minutes, avoid long-term ultrasound causing temperature rise.

4. Post-use treatment

Cleaning equipment

Immediately clean the dispersion equipment with a solvent (such as water, ethanol) to prevent cross-contamination caused by dispersant residues.

Storage product

Store in a sealed container to avoid moisture absorption or contamination.

Storage temperature: 5~35℃, light-proof, dry environment.

Record parameters

Record the dispersant model, dosage, dispersion time, equipment parameters, etc. for subsequent production traceability.

5. Precautions

Safe operation

Wear protective equipment to avoid inhalation or contact with the skin. If contact is made accidentally, rinse immediately with plenty of water.

Compatibility test

Before large-scale use, a small test (such as preparing a 100g sample) is required to confirm the dispersion effect, system stability and final product performance.

Storage conditions

Avoid mixing with strong oxidants and reducing agents to prevent chemical reactions.

Environmental requirements

Choose low-VOC or solvent-free dispersants to reduce waste liquid emissions. Waste liquid must be handled in accordance with local environmental regulations and cannot be dumped directly.

Through standardized operation, matte powder dispersants can significantly improve product performance and production efficiency. In actual use, it is necessary to adjust parameters in combination with specific processes and equipment, and optimize the formula through experiments.