发明授权
- 专利标题: Temperature-indicating sheet
- 专利标题(中): 温度指示表
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申请号: US776217申请日: 1985-09-16
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公开(公告)号: US4601588A公开(公告)日: 1986-07-22
- 发明人: Ichiro Takahara , Tomoyoshi Ono , Makoto Nakai
- 申请人: Ichiro Takahara , Tomoyoshi Ono , Makoto Nakai
- 申请人地址: JPX
- 专利权人: Matsumoto Kosan Kabushiki Kaisha
- 当前专利权人: Matsumoto Kosan Kabushiki Kaisha
- 当前专利权人地址: JPX
- 优先权: JPX58-163754 19830905; JPX59-45985 19840310
- 主分类号: G01K11/06
- IPC分类号: G01K11/06 ; G01K11/16 ; G01K11/12
摘要:
The present invention provides a temperature-indicating sheet which, when exposed to temperatures higher than the prescribed temperature in temperature-control for the common low-temperature preserved goods, changes in color according to the exposure temperature and time. This object is attained by arranging one component which melts at the prescribed temperature and a substance which irreversibly changes in color in contact with said component through a membrane permeable to the component. The sheet of the present invention comprises a component which melts at the prescribed temperature, a substance which changes in color in contact with the component and a membrane permeable to the molten component, said component being included in microcapsules which can be broken by outer pressure at a temperature used, and in which the component and the substance are arranged at the opposite sides with respect to the membrane.