231results about How to "Good anti-foam" patented technology

The invention relates to methods for testing foam properties. The methods include an antifoaming property testing method and a defoaming property testing method. The two testing methods comprise the following steps: (1) adding 800-1200ml of liquid to be tested to a transparent test tube with inner diameter of 20-100mm and capacity of 2200-3500ml in advance; (2) vertically injecting the liquid to be tested downwards at a flow rate of 2-12L/min at the height 30-80cm distant from the level of the liquid in the step (1) to generate foams and at the same time, the liquid to be tested flowing out from the bottom of the test tube at the same rate; and taking the amount of the generated foams and the generation time of the foams as well as the subsequent defoaming time as the corresponding parameters. The invention also relates to a device for testing foam properties. The methods and the device have the following beneficial effects: various errors generated by manual operation can be avoided; and the methods and the device not only are suitable for evaluating the defoaming effects of the defoamers for working fluid under various temperature but also can be used for evaluating the antifoaming effects of various systems to which the defoamers are not added and the inspection methods of the defoaming properties of other water-based products (such as washing agents and the like).