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Method for monitoring accumulative heating quantity of heat reactive articles and indicator used by method

A heat-sensitive and heat-receiving technology, applied in the field of materials, which can solve problems such as color change speed delay

Active Publication Date: 2013-01-02
SUZHOU HUASHI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second category is the so-called critical temperature-time indicator (Critical Temperature-Time Indicator, CTTI), the color change speed of this label is delayed, and the color changes after being exposed to the set temperature for several minutes or tens of minutes

Method used

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  • Method for monitoring accumulative heating quantity of heat reactive articles and indicator used by method
  • Method for monitoring accumulative heating quantity of heat reactive articles and indicator used by method
  • Method for monitoring accumulative heating quantity of heat reactive articles and indicator used by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0239] Use dye A as the thermal material of the time-temperature indicator, quantitatively print 2% dye A (solvent is ethyl acetate, the amount of dye A per square centimeter is about 200ug) on ​​ordinary A4 paper as the indicator functional layer, Put the commercially available self-adhesive paper that can effectively absorb dye A on top of dye A, and make the self-adhesive face the dye layer, and then use a dye-impermeable sealing film to seal the indicating function layer and the self-adhesive as the adsorption function layer , and place the sealed sample at a constant temperature of 25°C. After leaving for a specific time, observe the color of the recording function indicating the layer. image 3 It is the color record of the indicator after it is placed at a constant temperature of 25°C for 0-105 days. After the dye A was completely volatilized, there was almost no dye trace left under the naked eye, indicating that the functional parts almost returned to the original co...

Embodiment 2

[0241] Figure 4a with Figure 4b It is the method of referring to Example 1, using dye A as the color difference ΔE of the time temperature indicator made of thermosensitive functional material at different temperatures * ab changes over time t. Color difference ΔE* ab =10 as the end point of discoloration, the discoloration time and speed of the indicator can be obtained, and then the activation energy corresponding to the change process can be deduced from the Arrhenius equation to be about 97.4kJ / mol ( Figure 5 ), so as to obtain the characteristic parameters of the indicator color change process temperature effect. This activation energy can well cover the inactivation activation energy range of 73.6-109 kJ / mol of polio vaccine reported in the literature, and can also cover the inactivation activation energy range of some other vaccines.

[0242] Image 6 It is a label designed for a hepatitis B vaccine using the dye, and the color change response of the TTI of the...

Embodiment 3

[0244] By adjusting the amount of heat-sensitive functional material printed per unit area of ​​the indicator function indication part, the total time for the indicator to change color can be regulated, which can be regulated by adjusting the amount of ink or the concentration of the ink during the printing process.

[0245] Figure 7 Dye A is used as the heat-sensitive functional material, referring to the method of Example 1, using different ink concentrations and the same amount of ink to obtain the initial chromaticity value of the indicator, and the color change process at the same temperature. The time when the indicator reaches the end point has a linear relationship with the amount of heat-sensitive functional material printed per unit area ( Figure 8 ).

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Abstract

The invention relates to a method for monitoring accumulative heating quantity of heat reactive articles and an indicator used by the method. The method for monitoring accumulative heating quantity of heat reactive articles comprises the following steps: (a) providing a heat reactive article; (b) adhering a layer of volatile dye to certain areas of the heat reactive article; (c) adhering a layer of adsorbing materials to the volatile dye; and (d) adhering sealing film to the certain areas and the peripheries of the certain areas, wherein the sealing film enables the adsorbing materials layer and the volatile dye layer to adhere on the heat reactive article in sealing mode, the volatile dye can volatilize under the condition of being heated, the adsorbing materials are adhered on the volatilized dye in irreversible mode, the color fading quantity of the volatile dye layer is in positive correlation with volatilizing quantity of dye, and the volatilizing quantity of dye is in positive correlation with heat absorbed by the heat reactive article. By means of the method for monitoring accumulative heating quantity of heat reactive articles and the time-temperature indicator provided according to the method, heating condition and quality state of the heat reactive articles can be effectively indicated.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a method for monitoring accumulated heat of heat-sensitive objects by using heat-sensitive materials. Specifically, the present invention relates to making time-temperature indicators using the volatile properties of materials, and through the material transfer process of heat-volatility-adsorption, the color change of the functional parts of the indicators can be realized, and the items using the time-temperature indicators are particularly special. It is whether heat-sensitive items deteriorate or fail due to excessive heat. Background technique [0002] Some items or products whose stability is very sensitive to temperature need to be stored or transported at low temperature, such as most vaccines, biological products, biologically active samples and some pharmaceuticals, as well as fresh milk, dairy products, fresh meat, fresh fish, etc. food etc. For a long time, marking t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/02G01K11/12G01K11/16
CPCG01K3/04G01K11/12B32B37/02B65D79/02B32B2519/00F16D66/021B32B7/06B32B7/12B32B27/08B32B27/20B32B3/04B32B2307/4026B32B2307/748Y10T156/10
Inventor 邓宗武英晓芳史小菊
Owner SUZHOU HUASHI MATERIAL TECH
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