MATERIAL FOR PRESSURE MEASUREMENT

The invention provides a material for pressure measurement which utilizes a color forming reaction between a colorless electron-donating dye precursor and an electron-accepting compound to form color, and having a color density difference (”D) of 0.02 or more before and after pressurization at 0.05...

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Bibliographic Details
Main Authors MATSUMOTO, Takayuki, WATANABE, Tsutomu
Format Patent
LanguageEnglish
French
German
Published 28.11.2018
Subjects
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
MEASURING
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE
PHYSICS
PRINTED CIRCUITS
TESTING
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Summary:The invention provides a material for pressure measurement which utilizes a color forming reaction between a colorless electron-donating dye precursor and an electron-accepting compound to form color, and having a color density difference (”D) of 0.02 or more before and after pressurization at 0.05 MPa. When the colorless electron-donating dye precursor is included in microcapsules and the median diameter of the microcapsules on a volume basis is A µm, 5000 to 30000 microcapsules having a diameter of (A + 5) µm or more are present per 2 cm × 2 cm area.
Bibliography:Application Number: EP20080765655