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Low temperature diffusion-type time-temperature indicator card preparation method

A diffusion-type, time-based technology, applied to thermometers, thermometers with physical/chemical changes, measuring devices, etc., can solve problems such as increased production difficulty, achieve good economic and social benefits, simple production process, and improve competitiveness Effect

Inactive Publication Date: 2016-02-03
HENAN AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0004] Chinese patent application number: 20091022730.5 discloses a diffusion-type time-temperature indicator, an indicator card and a preparation method of the indicator card, in which methyl salicylate and γ-caprolactone are mixed as a temperature-time indicator, but When the mixed indicator is solidified, it needs to be carried out at -80°C, which increases the difficulty of its production

Method used

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  • Low temperature diffusion-type time-temperature indicator card preparation method
  • Low temperature diffusion-type time-temperature indicator card preparation method

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Embodiment 1

[0016] Take ethyl laurate and ε-caprolactone at a volume ratio of 11:1, add the colorant Acid Orange II and mix in a speed mixer at a speed of 4000r / min for 3-5min. To obtain the indicator, take 130 μL of the indicator in a centrifuge test tube and place it at -10°C to solidify it; put the diffusion medium and the solidified indicator into the corresponding groove on the substrate, and make one end of the diffusion medium extend into the groove The bottom of the tank is in contact with the indicator, and then sealed with a sealing film to obtain a time-temperature indicator card. The diffusion medium is a silica gel sheet with a specification of 10×0.7cm. The critical temperature of the time-temperature indicating card of this embodiment is -1 ℃, and the diffusion rate under this temperature is 1.35×10 -2 cm / min, this indicator card is used to detect refrigerated grapes and refrigerated beef, etc. If the ambient temperature is higher than -1°C, the indicator will melt and diff...

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Abstract

The invention discloses a low temperature diffusion-type time-temperature indicator card preparation method. The time-temperature indicator consists of ethyl laurate, epsilon-caprolactone and a coloring agent, and the volume ratio of the ethyl laurate to the epsilon-caprolactone is 11:1. The time-temperature indicator card adopts the mixture of the ethyl laurate and the epsilon-caprolactone as a diffusible substance, the coloring agent acid orange II is further added, the indicator is prepared by fully mixing, then the solidified state is formed by low temperature processing, and the solidified indicator is in contact with the diffusible medium for preparing the indicator card. The time-temperature indicator card can be applicable to the needs of different frozen foods.

Description

technical field [0001] The invention relates to a low-temperature diffusion type time-temperature indicator, and mainly relates to a preparation method of a time-temperature indicator card using the indicator. Background technique [0002] Fruits, vegetables, livestock and poultry foods generally require the temperature not to be higher than 0°C during the cold storage process, and they are easily affected by external environmental conditions such as light, temperature and humidity during storage, transportation or shelf life, so controlling the external environment is a key issue. very important link. Among all external environmental factors, temperature fluctuations in the circulation link are the main factors that cause product quality to decline. Improper temperature control in the storage environment will cause spoilage of fruits, vegetables, livestock and poultry, and cause economic losses. In the actual cold chain, the temperature is often higher than the set tempera...

Claims

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Application Information

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IPC IPC(8): G01K11/16
Inventor 谢新华徐超艾志录潘治利王娜
Owner HENAN AGRICULTURAL UNIVERSITY
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