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Solid temperature-sensitive color-changing label

A technology of temperature-sensitive discoloration and labeling, applied in the field of labeling, can solve problems such as being unable to apply to various scenarios, and achieve the effect of high technical threshold

Inactive Publication Date: 2020-10-23
苏州善恩纳米功能材料科技有限公司
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Problems solved by technology

[0003] In related technologies, the main body of temperature-sensitive color-changing materials is mostly liquid or gel, which cannot be applied to various scenarios

Method used

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  • Solid temperature-sensitive color-changing label

Examples

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Effect test

Embodiment

[0014] This example demonstrates the implementation process of one of the solid safety labels for visual monitoring of cold chain food. The solid temperature-sensitive color-changing label is composed of 10% volume fraction of photonic crystal nanoparticles, 50% volume fraction of water and 40% volume fraction of polyethylene glycol (molecular weight: 6000). The pattern is formed under the condition of external special magnetic field and low temperature (3-5 degrees Celsius); the patterned label is placed in an oven at 5 degrees Celsius, and no obvious color change is observed during the experiment period; the temperature-sensitive material ratio exceeds At 8 degrees Celsius, as the temperature rises and the fluidity of the liquid increases, the original photonic crystal structure will not be maintained, so the color and pattern will gradually change until they disappear. Here we take the label out and place it at room temperature (20 degrees Celsius). After 5 minutes, Its col...

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Abstract

The invention discloses a manufacturing method of a solid temperature-sensitive color-changing label. The method comprises the following steps of 1) preparing a magnetic response photonic crystal,2) ultrasonically dispersing the magnetic response photonic crystal prepared in the step 1) into a temperature-sensitive dispersion liquid,3) putting the dispersion liquid in the step 2) into polydimethylsiloxane and a curing agent, mechanically stirring until the dispersion liquid is uniformly mixed, and curing,4) enabling the temperature-sensitive liquid film to present patterns and colors under thecondition of an external special magnetic field,and5) placing the temperature-sensitive liquid film in an oven to fix the pattern and color, so as to obtain the temperature-sensitive color-changing label. The color of the label does not change within a sensitive temperature, the color and the pattern exceeding the sensitive temperature change, and the change is irreversible. The temperature-sensitive color-changing label has the advantages of high sensitivity, high reliability, high anti-counterfeiting property and high integration.

Description

technical field [0001] The invention relates to the field of labels, in particular to a solid temperature-sensitive color-changing label. Background technique [0002] With the rapid development of economy and technology, convenient visual anti-counterfeiting becomes more and more important. The solid anti-counterfeiting label made of temperature-sensitive color-changing materials can change the visible absorption spectrum when the ambient temperature changes. broad attention. [0003] In related technologies, the main body of temperature-sensitive color-changing materials is mostly liquid or gel, which cannot be applied to various scenarios. [0004] This patent can solve the above deficiencies. [0005] The temperature-sensitive color-changing material involved in this patent can fill this technical gap. The material is based on the emulsion formed by metastable photonic crystals and polymers dispersed in solid polymers to develop and change color. It can not only reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02
CPCG09F3/0291
Inventor 何乐全跃龙邵一帅
Owner 苏州善恩纳米功能材料科技有限公司
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