2. For the polyurethane industry, the most ideal fineness range of color paste is to reach less than 15 microns, if the fineness is too large, the pigment particles in the foaming process of the product, will produce "nucleation" effect, thereby affecting the structure of the cell, at the same time the surface of the product will also be rough, in addition, due to the poor color exhibition of the color paste and increase the amount of addition;
3. The amount of color paste added should be controlled within 3% of the polyol, so that their effect on the formula is negligible.
Although the color paste occupies a small position in the production of polyurethane products, its role can not be ignored, and it is also a hard requirement of many customers, so choosing a high-quality color paste is a strong guarantee for improving competitiveness.
