Title:
TEMPERATURE DETECTION INK, TEMPERATURE DETECTION INK INITIALIZATION METHOD, TEMPERATURE INDICATOR, AND ARTICLE MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/142480
Kind Code:
A1
Abstract:
The present invention addresses the problem of making it possible to provide temperature detection ink having a color that can be initialized through a simple method and that, at and above a reaction temperature, changes with the accumulation of time and temperature, and to solve this problem, provides a temperature detection ink that is characterized by including a temperature detection material and solvent and in that: the temperature detection material has a structure in which a temperature indicator including a leuco dye, developer, and decolorizer is encapsulated in microcapsules or a structure in which a phase including the temperature indicator and a matrix material are phase separated; the temperature indicator is solidified while remaining colorless by being cooled from a melted state to or below a glass transition point at a prescribed speed or faster; the glass transition temperature of the temperature indicator is between -20°C and 60°C, inclusive; and the melting point of the temperature indicator is between 60°C and 250°C, inclusive, and is lower than the boiling point of the solvent.
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Inventors:
AIDA KOHHEI (JP)
MORI SHUNSUKE (JP)
ARAYA KOTARO (JP)
TSUBOUCHI SHIGETAKA (JP)
KAWASAKI MASAHIRO (JP)
MORI SHUNSUKE (JP)
ARAYA KOTARO (JP)
TSUBOUCHI SHIGETAKA (JP)
KAWASAKI MASAHIRO (JP)
Application Number:
PCT/JP2018/042462
Publication Date:
July 25, 2019
Filing Date:
November 16, 2018
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01K11/16; B65G61/00; C09D11/50; C09K9/02
Domestic Patent References:
| WO2017068657A1 | 2017-04-27 |
Foreign References:
| JP2001041829A | 2001-02-16 | |||
| JP2017115027A | 2017-06-29 | |||
| JP2017106005A | 2017-06-15 | |||
| JP2001348568A | 2001-12-18 |
Other References:
See also references of EP 3745106A4
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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