Stringiness Characterization of Emulsion Products by Using a Stress Control-Type Rheometer

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  • 乳化製剤の応力制御型レオメーターを用いた曳糸性評価
  • ニュウカ セイザイ ノ オウリョク セイギョガタ レオメーター オ モチイタ エイシセイ ヒョウカ

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Rheological characteristics of stringy cosmetic emulsions that contain different ingredients and have different firmness was determined by a stress-controlled rheometer. Although the measurement of steady flow showed the first normal stress difference [N1] increase and viscosity [η] decrease with increase in shearing speed, there was no correlation between both parameters and the sensory evaluation score which indicates the degree of the stringiness. But it was found that new parameter ([N1]/[η]) has a strong correlation with the sensory evaluation score(r > 90) within a range of 300 - 1000S-1.

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