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US 11,958,307 B2Granted
Material composition for pressure measurement, material for pressure measurement, and material set for pressure measurement
AssigneeFUJIFILM Corporation
InventorSatoshi Tanaka
Life of this patent
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Abstract
Provided are a material for pressure measurement, including a color forming layer that contains microcapsules A encapsulating an electron-donating colorless dye precursor and microcapsules B not encapsulating an electron-donating colorless dye precursor, in which a volume standard median diameter D50A of the microcapsules A and a volume standard median diameter D50B of the microcapsules B satisfy Equation 1; a material composition for pressure measurement; and a material set for pressure measurement: D50A<D50B Equation 1.
Claims16
A material for pressure measurement, comprising:
- a support that is a plastic film;
- a color forming layer that contains microcapsules A, each of which has a capsule wall formed of a resin film and which encapsulates an electron-donating colorless dye precursor;
- and
- an easy-adhesion layer between the support and the color forming layer,
- wherein a coefficient of variation of particle size distribution of all particles contained in the color forming layer is 35% to 150%, and
- wherein a volume standard median diameter D50X of all particles contained in the color forming layer is larger than 15 μm, and wherein a volume standard median diameter D50A of the microcapsules A satisfy Equation 2:
- 10 μm<D50A<40 μm Equation 2.
4 more elements
Dependencies are inferred from the claim text.