Title:
PRESSURE MEASUREMENT SHEET SET AND PRESSURE MEASUREMENT SHEET
Document Type and Number:
WIPO Patent Application WO/2020/262148
Kind Code:
A1
Abstract:
The present invention provides a pressure measurement sheet set having limited temperature dependency of coloring even when used in a high temperature environment (particularly, environment of 180-240°C), and a pressure measurement sheet. A pressure measurement sheet set according to the present invention is provided with: a first sheet having a first layer which includes microcapsules containing a coloring agent; and a second sheet having a second layer which includes a developer, wherein a coloring density difference obtained through coloring density measurement 1 is 0.25 or less. Coloring density measurement 1: A laminate is formed by laminating the first and second sheets so as to set the first layer of the first sheet and the second layer of the second sheet opposed to each other, and a difference in optical density of the laminate before and after heating the laminate at 220°C for 2 minutes in a non-pressure applied state is used as a coloring density difference.
Inventors:
TANAKA SATOSHI (JP)
Application Number:
PCT/JP2020/023771
Publication Date:
December 30, 2020
Filing Date:
June 17, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G01L5/00
Domestic Patent References:
| WO2018199044A1 | 2018-11-01 | |||
| WO2018057964A1 | 2018-03-29 |
Foreign References:
| JP2002292665A | 2002-10-09 | |||
| JP2009014674A | 2009-01-22 | |||
| US5225118A | 1993-07-06 |
Other References:
ANONYMOUS: "● INSTRUCTION MANUAL ● PRESSURE MEASUREMENT FILM", FUJIFILM CORPORATION, March 2017 (2017-03-01), pages 5 - 8, XP055778685, Retrieved from the Internet
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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