How to choose defoamer products for foaming of semi synthetic cutting fluid

　　The foam problem has been puzzling the stakeholders in all aspects of metal processing, and solving the foam problem is also a job that occupies a large part of the time of technical R&D and technical service personnel. Based on the current semi synthetic metalworking fluid system, everyone is looking for appropriate methods to reduce the impact of foam.

　　At present, semi synthetic cutting fluid is the most widely used product in the market, with the largest number of design and processing fields. The foam problem still needs to be formulated according to the application, not only one product can cover any application.

　　Semi synthetic cutting fluid should have multiple functions such as cooling, lubrication, cleaning, and metal protection, while also meeting the customer's requirements for environmental protection, user-friendly operation, low consumption, and long service life. In order to meet the needs of customers, when designing formulas, we need to consider the balance between the various performance of the product, and try to meet the needs of most customers as much as possible.

　　Generally, the defoaming of semi synthetic cutting fluid depends on the hardness of defoamer and water (calcium and magnesium ions in water). Traditional defoamers are time sensitive, so the hardness of water plays a decisive role in the performance of foam.

　　For customers who use hard water: they have high requirements for hard water resistance of cutting fluid, but seldom worry about foam;

　　For customers using soft water, the requirements for hard water resistance of cutting fluid are low, and they may worry about foam.

　　Therefore, how to select products or design products according to customers' working conditions and water quality is a very important step. Therefore, according to the process conditions, recommending suitable products can solve customers' foam problems.

　　In addition, the requirements for foam under some special application conditions are also extremely strict, such as the high-pressure processing of 70Bar, which is difficult for traditional foam products to meet. Therefore, for the working condition of metal processing with high injection pressure, the corresponding formula platform is needed to solve the application to meet the demand for foam.

　　In most cases, once there is a foam problem, customers may complain that the foam of the product is not good, and it is easy to label the product "poor foam". In terms of foam performance, we need to treat it rationally. In addition to ensuring the foam performance of cutting fluid itself, we also need to supplement it from other aspects.

　　The use of defoamers:

　　The use of defoamers often needs to be combined with on-site operating conditions, factory limitations, and cutting fluid products to select the most suitable defoamer additive.