Thermal grease is widely used in electronic and electrical, household appliances, medical equipment, security equipment, aerospace, instrumentation, lighting and other industries, and is an indispensable thermal conductive material. The function is simply to prolong the service life of the product. If the viscosity of thermal grease is not suitable for application, inconvenient operation and abnormal adhesion will occur during the application process, so how to identify the viscosity of thermal grease? Today, CoolThermo Technology, a thermal grease manufacturer, will introduce several methods for testing the viscosity of thermal grease.
Vertical flow refers to the state in which the thermal grease flows vertically. The method of judgment is visual inspection. This method is very easy to identify and convenient for thermal grease with a large difference in viscosity, but for thermal grease with similar viscosity, This method may not be applicable and may lead to misjudgment. Therefore, the viscosity of thermal grease is only suitable for products with low viscosity, and the viscosity of contrast is only suitable for thermal grease with a large difference.
Can the viscosity of thermal grease be fully characterized by viscometer test? Thermal grease without special functions, generally the higher the viscosity, the greater the data measured by the viscometer, so using the viscometer to test the viscosity of the thermal grease can identify the viscosity of the thermal grease, but it has special functions For products with thixotropic properties, it may be inaccurate to use viscosity to identify the viscosity. Therefore, the premise of using the viscosity to identify the viscosity of thermal grease is to understand the functional characteristics of thermal grease.
Penetration is an important indicator to identify the viscosity of thermal grease, and it is also a very effective method. The test of penetration of thermal grease is not affected by thixotropy, and is determined by the depth of the cone as a free-fall needle into the thermal grease. , The higher the viscosity of the thermal grease, the shallower the depth of the cone penetration. The key to the penetration test is to test the flatness of the needle penetration surface of the product.
The above methods to identify the viscosity of thermal grease need to be selected according to the functional characteristics of thermal grease itself. Among the three methods, CoolThermo Technology recommends using a cone penetration tester for testing.