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    A Small-Scale System to Evaluate Anti-Foam Performance

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    Foaming is a widely observed phenomenon in manufacturing and product-filling and in dilution of agricultural chemicals. Foam generation should be avoided, however, since time and container volume are limited. Antifoam agents are designed to minimize foam-related trouble when used in the formulation as a processing aid or a spray-tank defoamer. This paper describes the design of simple equipment which allows easy laboratory-scale evaluation of defoamers for liquid systems.

    The principle is as follows: A calculated amount of water at given pressure is added to a certain volume of formulation through a specially designed nozzle. After generation of foam, its initial volume and decomposition rate are measured versus time. This system allows very simple testing of the influence of defoamers on liquid systems. It requires only a very small amount of material and it quickly yields accurate results relating to real-life conditions.


    foam testing, defoamer, packaging foam, tank mixes, test equipment, flowable suspension (suspension concentrates)

    Author Information:

    Frank, R
    BASF Wyandotte Corporation, Parsippany, NJ

    Hazen, JL
    BASF Wyandotte Corporation, Parsippany, NJ

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP32859S