And the particle volume (V) of the relationship can be represented by an expression D = 1.24V1 / 3 Fig. In addition, particle size and particle size distribution analysis of data from a variety of different methods may not be obtained confirm each other, can not be absolutely horizontal comparison. ? Because of the particle size distribution of the powder material import contact angle meter wide angle of water droplets, from nanometer to millimeter level, so when describing the material particle size, the particles can be divided according to the size of the nano-particles, ultrafine particles, particle , fine, coarse and other species. Depending on the nature of these particles can use the appropriate particle size analysis methods and instruments. One important indicator of recent years, with the rapid development of nanoscience and technology, particle size distribution and particle size of nanomaterials characterization of nanomaterials has become, in the ordinary material particle size analysis, the study of the particle size is generally 100nm ~ 1um size range. Faced with nano-materials research, and its scales are most concerned about. Many droplets insulation measures corner of the mold, asbestos cloth or glass available aluminum hydroxide insulation cotton cloth wrapped warm. Now on the market there is a thermal insulation coating is the ideal insulation material for the mold, it is the Chinese and long fiber pulp, and a mixture of foam insulation, moderate viscosity, easy to apply. This material is often used as insulation material in chemical, heating pipes, containing slightly alkaline (corrosive mold). After use at 150 ℃ conditions not found charred, melted, the negative impact of smell. At the same time the material is very light, strong plasticity plasma cleaning the contact angle of water droplets angle, easy to form a more beautiful mold surface water cooling is used to cool the way most of the mold, but it also has its drawbacks; require pipeline seal better, way down pipes must be smooth, big waste of water. When the cooling temperature exceeds 100 ℃, easy to produce steam explosion. The advantage is a large heat capacity, enabling rapid cooling. Air cooling is an ideal method for cooling and water cooling the contrary, it does not require tight duct seal, there is no waste of resources below 10 ° contact angle measurements, can be higher than the cooling temperature of the mold 100 ℃, gas may flow through to determine the rate of cooling, and the source of simple and convenient, there is a certain scale production plant can be made more convenient gas source. Shenzhen droplets angle tester, ShengDing instrument (certified), drop angle provided by the Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) is Dongguan, Guangdong, dedicated instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create ShengDing instrument a better future.