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Certified Instruments as “Analytical and Scientific Instrument Heritage”

The Japan Analytical Instruments Manufactures’ Association(JAIMA) and the Japan Scientific Instruments Association(JSIA) started the Analytical and Scientific Instrument heritage Certification system in 2012 with the goal of promoting the preservation of analytical techniques and instruments and scientific instruments of historical significance.

Kyowa’s instruments were certified as “Analytical and Scientific Instrument Heritage” in 2012, 2013 and 2015.


Bowden type Friction-Abrasion Analyzer certified in 2015


In the 60s, “Inclined method” prevailed the main stream of a friction meter until “Inclined method” was replaced by “Bowden type tester”. An inclined method is just to measure the angle as a weight on the surface of subject start to slide. With this method it is limited to obtain a static friction value only as a rough and simple device.

During this period of high economic growth in Japan, a demand of households such as camera, automobile has increased so fast, so that manufacturers needed to have an information of not only static but also dynamic friction value for a research and development to design such new products, then KYOWA released for their R & D needs a new friction meter accommodating Bowden type mechanism by sliding a subject back and forth horizontally.

In an early stage of development, our engineers confronted the issue that unstable friction forces particularly in the range of heavier weight due to a proper oscillation caused by a moment of inertia of balance which sensor was affixed to it.

By changing the mindset that we avoided to set a weight on the top of arm of balance, a weight should be put underneath of balance by using a horseshoe shape rigid steel arm.

This innovative modification made possible to obtain not only stable data and but also a static friction and a dynamic friction on the same position.  

This new product contributed to various industries as such pneumatic tier , grease for aircraft and film wind roll technique for creating new brand of products.

Forerunners including founder of our company elaborated on creating the friction meter under adverse situation which an accurate sensor was not available at that time, they challenged to invent a handmade strain gage as a sensor by themselves.

Again we can confirm the founder Mr. Tomoji Kamei’s firm intention that he put the title of documents to take over to the current president Mr. Shinichi Kamei son of him was “Science of Friction” and this sprit has been inherited to new products (TS series) of friction-abrasion meters (under patent application ) released in the spring of last year.


Surface Tensiometer certified in 2013


This was launched in 1971 as the first commercialized surface tensiometer adopting Wilhelmy plate method in the world.

At that time, surface tensiometers of du Noüy ring method was common and their resolutions were 0.5 to 1 mN/m. Our system used innovative lamp-scale and attained the precise resolution 0.1 mN/m. In addition, it allowed measurements with time function and enabled evaluation of absorbing phenomena and equilibration of surfactants. We proud this system must have contributed the development of chemical industries.


Precision Contact Angle Meter certified in 2012


Kyowa Kagaku Seiki (the predecessor of Kyowa Interface Science Co., Ltd.) released the first contact angle meter that adopted the tilting-plate method, which is the evaluation index for “wetness”.  It adopted the θ/2 method ( the method to connect the two of the top and the end of the points) in the drop method, the mainstream of measuring method now, for the first time to reduce personal errors.

It took time for the drop method at that time, during which it faultily made liquids vaporize of osmose.  It is easy to measure changing wetness of evaporable liquids of surfactant solutions in the tilting-plate method.  The method also has the advantages that pole-shape samples are measurable.  Furthermore, the mechanism of the tilting-plate method was applied and the dynamic contact angle measuring meter, measuring with the “falling method” (that tilts stages to drop liquids), was developed.

The advanced technologies and the comfortable lives today are brought in by expanding the contact angle meters and controlling “wettability” (interface science).