| 摘要 |
PURPOSE:To obtain the pressure measuring sheet which excels in the measurement accuracy and features the small pressure velocity dependence, using the microcapsule manufactured through the surface or internal polymerizing method and wit use of the specified core material. CONSTITUTION:The solvent such as triethylnaphthalene, di-tert-butylnaphthalene, diphenylethane, whose solubility parameter is about 7.5-8.5, is used as the core material. And the color former (the achromatic organic compound featuring the electron donative properties which forms the color with contact to the solid acid) of about 0.5-10wt% is added to the core material in order to form the microcapsule via the surface or internal polymerizing method. Then the above mentioned capsule is coated about 0.5-25g/m<2> onto the supporter along with the binder to form the pressure measuring sheet. Such sheet is stacked to the sheet coated with the developer (electron acceptant solid acid) with the coating surfaces opposed to each other to be used for pressure measurement. |
