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2. 发明授权

US4931420A Temperature history indicator and its manufacturing method 失效
标题翻译：温度历史指标及其制造方法
公开(公告)号：US4931420A
公开(公告)日：1990-06-05
申请号：US043745
申请日：1987-04-29
申请人： Makoto Asano , Haruki Tsutsumi , Eishi Tanaka , Yoshiro Fuseya , Kiyoharu Hasegawa , Hiroyuki Akahori
发明人： Makoto Asano , Haruki Tsutsumi , Eishi Tanaka , Yoshiro Fuseya , Kiyoharu Hasegawa , Hiroyuki Akahori
IPC分类号： G01K11/06 , G01K3/04
CPC分类号： G01K3/04 , Y10S428/913 , Y10T428/24802 , Y10T428/24868 , Y10T428/24876
摘要： A temperature history indicator and its manufacturing method wherein the indicators are formed as chips, labels, tags or the like and accompanied with those goods or their packings which must be stored at a certain temperature or lower and when their storage temperature rises higher than the certain temperature over a not-permissible time period, this fact can be visibly shown by development or change of color caused by chemical matters in the indicator, characterized in that when temperature rises higher than a certain value, a hydrophobic organic compound enclosed in microcapsules melts and diffuses causing a dye-precursor and a color developer, which are prepared independently of the compound, to be contacted with each other to irreversibly achieve color development or change, that this color development or change system is rendered operative when the temperature rise continues to exceed a permissible time period, and that when the tops of the color development or change systems are coated with a transparent material, the arrangement of a bonding agent is improved neither to break those chemical compositions which cause the color development or change nor to lower their color developing function.
摘要翻译：温度历史指示器及其制造方法，其中指示器形成为芯片，标签，标签等，并且伴随着必须在一定温度或更低温度下储存的那些商品或其包装，并且当它们的储存温度升高到高于某一温度温度超过不允许的时间段，这一事实可以通过由指示剂中的化学物质引起的颜色的变化或变化而明显地显示，其特征在于当温度升高高于一定值时，封闭在微胶囊中的疏水性有机化合物熔化和使独立于化合物制备的染料前体和显色剂的扩散彼此接触以不可逆转地实现显色或变化，使得该显色或变色系统在温度升高持续超过允许的时间段，以及颜色开发或更换系统的顶部涂覆有透明材料，粘合剂的布置既不破坏导致显色或变色的化学组成，也不能降低其显色功能。

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