The contact angle greater the greater the degree of wetting, why wetting angle solid, liquid and gas at the junction of three phases, from "liquid - solid" interface, the liquid inside, the contact angle equipment maintenance upgrade, reached the "gas - liquid" Angle interface, attension drop angle, represented by θ, the smaller the wetting angle, contact angle, wetting the better the performance, you think umbrella, an umbrella is to require non-wetting, when raindrops fall on the umbrella, Run wet angle is very large. material into a hydrophilic material and hydrophobic material only, when the contact angle between 0-90 ° called hydrophilic material, vacuum contact angle measurement, the contact angle at 90 ° -180 ° between hydrophobic material. About static water contact angle measurements technical problems? Static contact angle measured the film, because the film always get uneven, resulting in a film, the biggest difference between the measured data can to ten degrees, a sample to be measured for a long time, ask the experts what methods can facilitate the film flatten, or what instruments can be used to prepare a glass slide, put on top of a small nail, the film side with double-sided adhesive, paste placed on a nail in the slide test of time directly to the small droplets drop in projecting position, to facilitate the observation, also can relatively flat membrane stretched too low contact angle tester | Shengding instrument (Online) | contact angles provided by the Dongguan City Ding Sheng Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) Dongguan, Guangdong, dedicated instrumentation leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create Shengding instrument better future.