1, In the process of mixing and blending often violent foaming.
Foaming causes volume expansion, which reduces the utilization of the blending equipment.Foaming limits the mixing speed and prolongs the blending time, and also prevents the pigments and fillers from being fully wetted.
2, After blending and production can be injected into the packaging barrel, continuous injection of the production line is by volume rather than by weight, bubbling so that the barrel can not be filled, and because the foam is gradually burst, and will make the weight injected into the barrel is not uniform, interference with continuous packaging.
3, Emulsion paint in use, foam will cause surface defects, such as traps in the coating film, that is, the bubble to the paint dry, the film is broken, so that the coating film appears small holes or called fish eyes.
There are two major types of water-based paints: emulsion paints and water-soluble paints. There are three main types of emulsion paints: vinyl acetate type, butylbenzene type and acrylic acid type, all of which are made by adding pigment paste to the resulting emulsion after emulsion polymerization.
These foams are mainly caused by mixing, equipment, added additives, raw materials, etc. If these foams are not treated, they will have an impact on the quality, appearance, cost and canning of the product. The water-based coating defoamer is a good solution to these foam problems.
paraffin wax emulsion formulation is the high efficiency surface waterproofing which suitable for water-based systems, it can significantly reduce the surface tension of the film.
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