Defoaming Solutions For Adhesive Industry
Waterborne adhesives may be supplied as solutions or polymer dispersions/emulsions or formulated as dry powders which must be mixed with water prior to application. The adhesives harden and attain strength when the water is lost from the glue line by evaporation or is absorbed by the substrates.
The waterborne adhesive has many types,such as starch/dextrin adhesives,protein/casein adhesives,vinyl acetate adhesives,rubber latex adhesives,polyacrylate emulsions,polyurethane emulsions and dispersions,pressure sensitive adhesive......
The process of adhesive:mixing glue - gluing - drying - bonding - pressurizing - finishing.
Adhesives are widely used in various fields,such as electronics, automobile, industry, chemical industry, construction industry and so on. However, in the production of adhesives, a large number of bubbles are produced,that affect the homogeneous mixing and uniform stability of the adhesive components.
Main causes of bubbles:
1. High speed stirring in the production process leads to the production of bubbles
2. Contains chemicals that are easy to foam
3. Addition of some kinds of chemical additives
4. Too much surfactant
The foaming hazard:
1. Foaming of adhesive affects the production process
2. The bubbles will affect the harmony of products.
3. Too much foam affects the bonding strength.
4. Stable foam will increase the volume of barreled,make barreled weight uneven, increase the cost of packaging.
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Regional Sales Manager - Component Manufacturing at Simpson Strong-Tie
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