Visual label for indicating environment temperature change

Abstract

The invention relates to the field of label materials and provides a visual label for indicating environment temperature change. The visual label at least comprises a three-layer structure formed by filter paper A, a plastic partition layer and filter paper B in sequential arrangement, and the plastic partition layer can be drawn away from the filter paper A and the filter paper B. The filter paper A contains a macromolecular polymeric material H-[OCH2-CH2-]n-OH and pigment which are uniformly mixed and used for indicating environment temperature change, and the pigment is food colorant or chemical dye. The temperature-sensitive label is adaptable to environments of food cold chain logistics, biological product cold chain logistics, refrigeration houses, refrigerator trucks, supermarket refrigerators, high-temperature cables, substations, polar regions and the like with special requirements on the temperature. Compared with existing temperature identification techniques, the visual label for indicating environment temperature change has the advantages of simplicity, quickness, convenience in use, wide application, low cost and the like.

Description

technical field [0001] The invention belongs to the field of label materials, and in particular relates to a color-visible temperature change indicator label prepared by polymer materials and its application. Background technique [0002] The storage and transportation of fresh animal food, fruits and vegetables, biological products, special medicines and reagents have certain requirements on ambient temperature conditions. For example, in the process of long-distance transportation, logistics, storage and distribution of low-temperature products, it is inevitable to temporarily store them in refrigerators (boxes) provided by dry ice, ice packs, etc., but the following problems often affect the intuitiveness of the user's exposure to the ambient temperature determination or monitoring of: [0003] (1) At present, almost all warehouses of logistics companies in my country do not have cold storage, so when low-temperature items (drugs, biological products) reach end users (or...

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Problems solved by technology

[0003] (1) At present, almost all warehouses of logistics companies in my country do not have cold storage, so when low-temperature items (drugs, biological products) reach end users (or consumers), often the dry ice and ice packs have melted, and it is impossible to know whether the low-temperature items are exposed, or even expired

[0004] (2) During the transportation of cold and fresh food, if the temperature in the refrigerated vehicle does not meet the food quality requirements or the temperature in the refrigerated vehicle is out of control, after arriving at the destination, although the ite

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