ISO 15989 ASTM D724 Research-Based Automatic Contact Angle Measuring Machine Test Liquid Surface Tension

1. Preface
The contact angle refers to the tangent line formed at the intersection of gas, liquid, and solid at the gas-liquid interface. This tangent forms an angle θ between the liquid side and the solid-liquid boundary. Measuring the contact angle is currently the main method for detecting surface properties. The LR-SDC-200S research based contact angle measurement instrument utilizes optical imaging principles and employs image contour analysis to measure surface contact angle, wettability, interfacial tension, forward and backward angles, surface energy, and other properties. This device has an automatic liquid device, high cost-effectiveness, strong scalability, and comprehensive functions, suitable for routine measurement needs. It has been widely used in many universities, research institutes, and enterprises.

2. Instrument Application Field
Contact angle measuring instruments are widely used in various fields, such as mobile phone manufacturing, glass manufacturing, surface treatment, material research, chemical engineering, semiconductor manufacturing, coatings and inks, electronic circuits, textile fibers, medical biology, etc. Contact angle measurement has become an important instrument for evaluating surface performance. (Select special accessories for certain testing functions)
1. The wetting behavior of the liquid on the solid surface, such as spreading, penetration and absorption, is measured by the static contact Angle with the droplet method;
2. Measure the forward Angle, backward Angle, contact Angle lag, rolling Angle and dynamic contact Angle of the material on the solid surface;
3. Continuous real-time study of absorption materials, process record, and analysis of contact Angle curve with time;
4. Contact Angle measurement of various special materials, such as powder, curved surface, super hydrophobic/super hydrophilic samples;
5. Test the contact Angle of the material immersed in the liquid by the adhesive drop method;
6. Measuring interfacial tension of various liquid surfaces and their polarity and dispersion components by hanging drop method;
7. Calculate the Surface free energy and its polar dispersion component;
8. Analysis of the liquid on the solid surface adhesion (Adhersion), assessment of solid surface uniformity, cleanliness, etc.

3. Principle
As shown in the above figure, the contact angle measuring instrument mainly consists of a light source, an injection unit, a sample stage, a collection system, an overall tilt platform, and analysis software. This device adopts the principle of optical imaging.
The light source adopts the design of dense LED cold light with uniform luminescence, image cleaning and long service life.
The injection unit adopts high precision injection pump, controlled by software quantitative and constant speed, stable drop, high precision;
The sample table adopts 3d manual fine-tuning platform, which is flexible in operation and accurate in positioning. The sample table can be customized according to the actual sample size.
The acquisition system adopts a black-and-white imported CCD camera, which can take stable pictures, make the images clear and reliable. The lens is equipped with German industrial import configuration, with adjustable magnification of 0.7-4.5 times and no distortion in the imaging.
The whole tilting platform adopts software to control tilting with high precision, with the accuracy as high as 0.01°
The analysis software has a powerful function, with one-button automatic fitting ability, with the world's most advanced fitting method, to meet the precise fitting of various liquid droplet morphology;

1.GB/T 24368-2009(detection of hydrophobic pollutants on glass surface);
2.SY/ t5153-2007 (reservoir rock wettability measurement method);
3.ASTM D 724-99 (2003) (test method for surface wettability of paper);
4.ASTM d5946-2004 (measurement of contact Angle between plastic film and water);
ISO15989 (measurement of water contact Angle of plastic film and thin plate corona treatment film);

6. Product features

1. The host adopts high-strength aviation aluminum alloy structure and modular design concept, independently developed integrated chip circuit control, adopts the design essence and configuration of the international top imported contact Angle equipment, to ensure the instrument has a strong stability;
2. Industrial grade dense adjustable LED cold light source system (life over 25000H) is adopted to ensure a clearer image and avoid the volatilization of small droplets caused by extra heat;

5. The first domestic company to provide the contact Angle measurement and calibration sample imported from Germany to ensure the precision of the instrument, and the Angle calibration standard piece 3°5°8°;60 ° 90 ° 120 °;115° (optional);
6. Flexible collection system design, suitable for most of the measurement environment, simple to cope with a variety of complex sample surface measurement;
7. Possess the most advanced contact Angle analysis method in the world, satisfying all kinds of liquid. Accurate fitting of drip imaging, including the unique differential ellipse of shengding. And differential circle special liquid imaging fitting method;
8. Adopt the international leading calculation method, the software has realized the full automatic fitting to avoid the error caused by human operation;
9. Quick fitting function for bilateral contact Angle measurement and more comprehensive quantitative analysis. Surface wettability of liquids and solids can be analyzed more accurately. Actual wettability;
10. Dynamic shooting and video fast test data, which can continuously record the change of test contact Angle, and then automatically batch fit by the software;
11. Software automatically generates reports, which cover Word form, Excel form, spectrogram. Various forms of data reports;
12. With a variety of optional functional parts, our r & d team is strong enough to meet various customized measurement requirements put forward by customers;
13. With the function of forward and backward Angle measurement, it is convenient for the most efficient measurement of sample surface stability;
14. Equipped with the rolling Angle measurement function, which can intelligently distinguish the sliding point of material surface and the forward and backward Angle measurement in this way;

Dongguan Lonroy Equipment Co., Ltd, located in Dongguan, Guangdong,  is a leading company specializing in the research and development, manufacturing and sales of high-tech and high-precision testing equipment. With 20 years of industry experience, we are committed to providing excellent testing solutions to customers around the world.

Our products include

1.Plastic and Rubber Testing Equipment: Melt Index Tester, Impact Tester

2.Universal Testing Machine and Tensile Testing Machine to detect mechanical properties

3.UV Aging Tester

4.Environmental Testing Equipment: Climate Chamber, Temperature and Humidity Chamber

5.Vibration Test Machine

6.Differential Scanning Calorimeter

7.And other testing instruments such as Ink Proofer, Packaging and Printing Test Machine

Our products are widely used in plastics, rubber, wire and cable, new energy and other industries, serving more than 50 countries around the world.

With annual sales exceeding US$20 million.

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Dongguan Lonroy Equipment Co., Ltd. has repeatedly achieved success in the international market with its   superb technology and high-quality services.

Adhering to the corporate mission of “providing customers with   accurate testing instruments, enhancing product value; creating development opportunities for employees”,we look forward to creating a better future with global partners.