To ensure uniform color pigments for polyurethane soft foam, the following steps can be taken:
Choose the right pigment: Use high-quality pigments with good dispersibility to reduce particle aggregation.
Premixing: Premix the pigment with a small amount of polyurethane substrate to ensure that the pigment is fully dispersed to form a uniform slurry.
Use appropriate stirring tools: Use a high-speed mixer or agitator to maintain continuous and uniform stirring to ensure that the pigment is fully integrated with the substrate.
Add pigment gradually: Add pigment in small batches, observe color changes, and avoid adding too much at one time to better control the color.
Control stirring time and speed: Maintain appropriate stirring time and speed to ensure uniform distribution of pigments and avoid bubbles caused by excessive stirring.
Test samples: Make samples for testing, observe the color effect, and adjust as needed.
Record the formula: Record the proportion of each pigment for repeated use in subsequent production.
Through the above steps, the color uniformity of polyurethane soft foam can be effectively improved.
