| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an evaluation method capable of comparing and predicting grip performance on ice in the state of a rubber composition in an accurate, simple and prompt manner.SOLUTION: A method for evaluating grip performance on ice of a rubber composition comprises: the hardness measurement step of measuring hardnesses of 500-20000 points at an interval of 50-500μm of the same surface of the rubber composition having longitudinal length of 3 mm or more and a lateral length of 3 mm or more as a measurement range by using a micro hardness tester having 0.5 mm or less of a diameter of an indenter point; the CV value calculation step of obtaining a standard deviation and an average value from the result of the hardness measurement to calculate a CV value (a standard deviation/an average value×100); and the evaluation step of evaluating grip performance on ice by determining whether the obtained CV value is 5.0% or more.</p> |
