TIME INDICATOR

• Main Authors: TAKAHASHI ATSUSHI, HAGIO YUMIKO
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MEASURING; PERFORMING OPERATIONS; PHYSICS; TESTING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a time indicator which can be easily confirmed visually.SOLUTION: The time indicator includes a first barrier layer, an oxygen absorption layer, and a second barrier layer stacked in that order. The oxygen absorption layer includes a thermoplastic resin and an oxygen absorbent which changes its color by absorbing oxygen. The first barrier layer has a light permeability at least partially, which makes it possible to visually observe at least a part of the oxygen absorption layer through at least a part of the first barrier layer. Further, at least a part of the side surface of the oxygen absorption layer is exposed to the atmosphere when the time indicator is being used, whereby oxygen is absorbed from the part of the oxygen absorption layer which is exposed to the atmosphere so that the color of the oxygen absorption layer will be continuously changed.SELECTED DRAWING: Figure 1 【課題】経過時間を目視によって容易に把握できる、タイムインジケーターを提供する。【解決手段】第１のバリア層、酸素吸収層、及び第２のバリア層をこの順で積層した状態で具備しており、酸素吸収層が、熱可塑性樹脂、及び酸素を吸収して変色する酸素吸収剤を含有しており、第１のバリア層の少なくとも一部が光透過性を有し、それによって酸素吸収層の少なくとも一部を、第１のバリア層の少なくとも一部を通して目視により観察することができ、かつ使用時に酸素吸収層の側面の少なくとも一部を大気中に露出させ、それによって酸素吸収層の大気中に露出された部分から酸素を吸収させて酸素吸収層を連続的に変色させる、タイムインジケーター。【選択図】図１