The addition of wetting dispersant has obvious effect on the foam of some water-based ink.For example, polyacrylic acid wetting dispersants foam more than other types of wetting dispersants.Generally speaking, wetting dispersant foam with low dispersion capacity is also less. If diisobutyl sulfonate is based on disate, there is little foam at its content of 0.1-0.25%.

The use of thickeners will make the defoaming work of high viscosity ink especially difficult, this type of ink has its own special defoaming agent.The drying time of ink film is closely related to the selection of defoamer. In the printing process, the ink film is required to dry quickly, so the defoaming agent with strong defoaming power should be selected in ink painting.

Latex ink has a high pH value.Not good for controlling bubbles.Emulsion polymer is used as film forming agent in acrylic ink, usually the particle of emulsion is very fine, resulting in defoaming work is difficult.Pigment particles such as carbon black, phthalocyanine blue and phthalocyanine green organic pigments have a tendency to increase foam in water-based ink, which is also caused by the pigment particles are too fine, and defoaming is also difficult.

Because many defoamer will affect the dispersion of pigment, pigment particles will adsorb defoamer particles, so the selection of defoamer, storage stability test must be carried out.The addition of filler in ink and wash also affects the existence of foam, for example, the use of silica instead of talc foam will increase. But this problem can be solved by increasing the amount of antifoaming agent.

Sinograce Chemical is mainly engaged in the business of water based ink and Wetting dispersant and other auxiliaries other product series.Good materials, advanced production technology, and fine manufacturing techniques are used in the production of chemical liquids.

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