How to choose the right defoamer for water-based adhesives
Defoamer is a low surface tension and high surface activity, can inhibit and eliminate the foam in the liquid material, that is to say, defoamer can reduce the surface tension of water, solution, suspension, etc., to prevent the foam or make the original foam elimination. Long-term defoaming is also known as foam suppression, the length of the foam suppression time is the main sign of the quality of the defoamer. Most of the occasions use defoamer is the use of his anti-foaming performance, rather than the initial antifoaming properties. Defoaming and foam inhibition is relative, defoaming performance is good relative to the product foam inhibition performance will be poorer, in the actual application, depending on the specific circumstances. So defoamer from the role of defoaming, including foam breaker(defoamer), foam inhibitor(antifoam), always called defoamer.
Some components of water-based adhesives are prone to bubble production and have a tendency to be stable and persistent. In addition to the production of rapid mixing and the use of high-speed coating construction will also contribute to the production of foam, so that the production can not be normal, but also affect the quality of the product. The formation of foam to the production and glue to bring great difficulties, and make the glue layer of air holes, affecting the outside of the product and adhesive properties, so we must try to destroy the foam or prevent the foam, the most effective way is to use defoamer.
There are many varieties of defoamers used in the water-based adhesive industry, but there are two main categories: polysiloxane defoamers and non-siloxane defoamers.
Therefore, the reasonable selection of adhesives defoamer is very necessary, if you still do not know how to choose the right adhesive defoamer, please contact us, for your customized foam solutions, provide free sample testing!
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