Measuring and testing – Surface and cutting edge testing
Patent
1985-08-26
1987-09-22
Noland, Tom
Measuring and testing
Surface and cutting edge testing
73 58, 2524081, G01N 1300
Patent
active
046946853
ABSTRACT:
There is provided a series of testing formulations or solutions which enable one to determine the critical surface tension or wettability of various solids, semi-solids and viscous liquids by application of the testing solutions to the surfaces of such materials or substrates. The solutions consist of a main solution which is 45 percent purified water and 55 percent of a dihydric alcohol such as ethylene glycol. This basic combination has a wetting tension of 56 dynes and has a completely neutral ph, and a neutral relative polarity. To vary surface tension, a non-ionic surfactant is added in ranges from about 1.5 percent to 0.001 percent by weight of the solution. In this manner the surface tension of each solution is varied in equal or predetermined increments. A dye is also employed to provide good contrast when the solution is placed on a test substrate. The percentage of dye can vary between 0.1 to 1 percent by weight depending upon the particular dye used. Due to the nature of the test solution provided, one can now perform wettability tests on various surfaces which could not be accommodated by prior art techniques. Each of the solutions employed have identical ph, identical viscosity, while further possessing the same neutral relative polarity.
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Marbetech Corporation
Noland Tom
Plevy Arthur L.
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