CN114623949A - Irreversible temperature change indicator and preparation method thereof - Google Patents
Irreversible temperature change indicator and preparation method thereof Download PDFInfo
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- CN114623949A CN114623949A CN202210187452.XA CN202210187452A CN114623949A CN 114623949 A CN114623949 A CN 114623949A CN 202210187452 A CN202210187452 A CN 202210187452A CN 114623949 A CN114623949 A CN 114623949A
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- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/14—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of inorganic materials
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Abstract
The invention relates to an irreversible temperature change indicator, which can be used for local color development if local high temperature or short circuit overheat occurs when the irreversible temperature indicator is applied to equipment such as precision instruments, power cables and the like, thereby reducing the complexity in the whole searching process and reducing the personnel safety problem for high-voltage equipment in the checking process. In addition, the irreversible temperature change indicator provided by the application is simple to operate and has a wide application market.
Description
Technical Field
The invention relates to the technical field of indicating devices, in particular to an irreversible temperature change indicator and a preparation method thereof.
Background
The high-temperature monitoring is to know the running conditions of the equipment, the parts and the like in real time, record the high-temperature environmental conditions of the equipment, the parts and the like, provide the temperature conditions of the equipment, the parts and the like for users, and ensure the adaptability and the durability of the use of the equipment, the parts and the like so as to ensure the normal running conditions of the equipment, the parts and the like. High-temperature monitoring is widely popularized particularly in the fields of precision instruments, power systems and the like, and the common means of cable high-temperature monitoring is mainly introduced below.
At present, SPYBALL capsule powder is available in the market, after the powder is coated on a cable, when a cable outgoing line is locally overheated, the color of the coated part disappears, but the color of the SPYBALL capsule powder is gradually restored after the temperature of the cable outgoing line is reduced to be below 0 ℃, the SPYBALL capsule powder belongs to a reversible temperature change indicating material, and when the reversible temperature indicating material exceeds a use temperature range, whether the cable outgoing line is in an overheated temperature condition or not can not be accurately reflected, so that the application of the SPYBALL capsule powder is limited.
Disclosure of Invention
The temperature condition that present reversible temperature change indicating material can't accurately reflect and wait to monitor whether article have been in overheated has mainly been solved in this application.
In order to achieve the above object, the present application is achieved by the following technical solutions.
The application provides an irreversible temperature change indicator, including base layer and the functional layer of piling up the setting, the functional layer becomes irreversible transparent state after the temperature reaches predetermined temperature for show the colour of base layer.
As a further improvement of the present application, the functional layer includes a phase change layer and an absorption layer stacked, and the absorption layer is disposed on at least one surface of the phase change layer; the phase change layer is subjected to phase change after the temperature reaches a preset temperature so as to present a transparent state, and a first substance is released; the absorption layer is used for absorbing the first substance released after the phase change of the phase change layer and presents a transparent state.
As a further improvement of this application, the phase change layer is formed by the solidification of temperature change thick liquids, the temperature change thick liquids include temperature change microcapsule and auxiliary agent, the temperature change microcapsule includes first substance and seals the wall material of first substance, the wall material is prepared by the temperature change material, the temperature change material causes the phase change layer takes place the phase transition after the temperature reaches predetermined temperature, so that the wall material of temperature change microcapsule breaks to release first substance.
As a further improvement of the application, the temperature-change material is one or more of polymethyl methacrylate, polyisocyanate, polyurea and polyamide.
As a further refinement of the present application, the first substance is a silicone oil; the absorbing layer is paper.
As a further improvement of the present application, a protective layer is further provided on a side of the functional layer remote from the base layer.
As a further improvement of the application, the base layer comprises a release layer, an adhesive layer and a base color layer which are sequentially stacked, and the base color layer is arranged below the functional layer, so that the functional layer is changed into a transparent state after the temperature reaches a preset temperature and then displays a color; the adhesive layer is arranged below the bottom color layer so that the irreversible temperature change indicator is attached to an article to be tested; the release layer is detachably arranged below the adhesive layer.
As a further improvement of the application, the base color layer is prepared from colored slurry, the colored slurry comprises inorganic pigment, and the inorganic pigment is any one or more of chrome yellow, iron blue, cadmium red, cadmium yellow, lithopone, carbon black, iron oxide red and iron oxide yellow.
As a further improvement of the present application, the adhesive layer is a double-sided adhesive tape, the double-sided adhesive tape is prepared from a single component or multiple components, the single component is any one of white oil glue, yellow hot melt adhesive, water glue and embroidery glue, and the multiple components are at least two of white oil glue, yellow hot melt adhesive, water glue and embroidery glue.
As a further improvement of the application, the auxiliary agent comprises an aqueous resin, and the auxiliary agent further comprises at least one of a dispersing agent, a leveling agent, a defoaming agent and a thickening agent.
In order to achieve the above object, the present application further provides a method for manufacturing an irreversible temperature change indicator, the irreversible temperature change indicator includes a base layer and a functional layer, and the irreversible temperature change indicator is manufactured by the following method: and stacking the functional layers on the base layer, wherein the functional layers are changed into a transparent state after the temperature reaches a preset temperature so as to display the color of the base layer.
As a further improvement of the application, the base layer comprises a release layer, an adhesive layer and a ground color layer, and is prepared by the following method: uniformly spraying an adhesive material on any one surface of the release layer to realize that the adhesive layer is stacked on the release layer; slurry with colors is uniformly sprayed on the surface, far away from the release layer, of the adhesive layer, so that a bottom color layer is stacked on the adhesive layer.
As a further improvement of the present application, the functional layer is stacked on the base color layer, the functional layer includes a phase change layer, and the phase change layer is prepared by the following method: s1, preparing temperature-change slurry; and S2, uniformly coating the temperature change slurry to form a film, and then curing to form the phase change layer.
As a further improvement of the present application, the functional layer further comprises an absorption layer, and the absorption layer is prepared by the following method: when the absorption layer includes only the first absorption layer between the base color layer and the phase change layer: preparing the first absorption layer on the base color layer, uniformly coating the temperature change slurry on the first absorption layer, and curing to form a phase change layer; or; when the absorption layer only includes a second absorption layer on a surface of the phase change layer remote from the base color layer: preparing the second absorption layer directly on the surface of the phase change layer far away from the bottom color layer; or; when the absorption layer includes the first adsorption layer that is located the end chromatograph with between the phase transition layer and being located the phase transition layer keep away from the second adsorption layer on the surface of end chromatograph: preparing the first absorption layer on the base color layer, uniformly coating the temperature change slurry on the first absorption layer, curing to form a phase change layer, and preparing the second absorption layer on the surface of the phase change layer far away from the base color layer.
The beneficial effect of this application lies in that, this application provides an irreversible temperature change indicator, when being applied to equipment such as precision instruments, power cable with this irreversible temperature indicator, if local high temperature or short circuit overheat appear, irreversible temperature indicator will be corresponding carry out local color development, both reduced the complexity at whole seeking-out in-process, reduced again at the personnel safety problem of investigation in-process to high-voltage apparatus. In addition, the irreversible temperature change indicator provided by the application is simple to operate and has a wide application market.
Drawings
FIG. 1 is a schematic view of the structure of state 1 of the irreversible temperature change indicator of the present application;
in the figure: 1. a base layer; 2. a functional layer; 3. a protective layer;
11. a release layer; 12. an adhesive layer; 13. a ground color layer; 21. a phase change layer; 22. an absorption layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the following description of the present application will be made in detail and completely with reference to the specific embodiments and the accompanying drawings. It should be understood that the described embodiments are only a few embodiments of the present application, not all embodiments, and are not intended to limit the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The application provides an irreversible temperature change indicator, including base layer 1 and functional layer 2 that the stack set up, functional layer 2 becomes irreversible transparent state after the temperature reaches predetermined temperature for show the colour of base layer 1. When the irreversible temperature change indicator is applied to a cable, when the external temperature of the cable is not lower than the preset temperature of the irreversible temperature change indicator, the irreversible temperature change indicator can display the color of the base layer 1, and the color of the irreversible temperature change indicator can be permanently retained, so that a cable user can conveniently observe the color.
The inventor finds that 3M company develops a thermochromic adhesive tape, and when the thermochromic adhesive tape is applied to a key node of a power system, the key node is overheated, and the thermochromic adhesive tape can irreversibly change color. For example, the electric power joint disclosed in chinese patent CN207197695U has a thermochromic functional layer 2 disposed on the surface of the electric power joint body, wherein the thermochromic layer may be a single layer made of pigments capable of changing color at different temperatures, or a multi-layer structure, such as a layer formed by common pigments and a wax layer on the common pigment layer capable of melting at a predetermined temperature, and when the wax melts at the predetermined temperature, the color of the lower pigment layer can be displayed. The inventor conducts experiments on the color-changing adhesive tape prepared by the temperature-sensitive color-changing layer, and verifies that the color-changing adhesive tape has certain defects that the color has time retention, when a cable outgoing line and a cable outgoing line are locally overheated, the color-changing adhesive tape needs at least one hour or more from colorless to obvious color development, and the judgment cannot be immediately made. Further, the present application provides the functional layer 2 to include a phase change layer 21 and an absorption layer 22 stacked, wherein the absorption layer 22 is disposed on at least one surface of the phase change layer 21; the phase change layer 21 changes phase to assume a transparent state after the temperature reaches a predetermined temperature, and releases a first substance; the absorption layer 22 is used for absorbing the first substance released by the phase change of the phase change layer 21 and presents a transparent state. When being applied to the cable with the irreversible temperature change indicator of this application, the irreversible temperature change indicator of this application takes place phase transition and absorbing layer 22 absorbs the first material that phase transition layer released mainly through phase transition layer 21 after reaching predetermined temperature to realize that functional layer 2 becomes transparent state, and then expose basic unit 1's colour, finally indicate the high temperature state that the cable was in through irreversible temperature change indicator. Compare with the reaction time that discolours of the pigment of discolouing and the wax endothermic reaction time that melts and become transparent, phase transition is more rapid, places the irreversible temperature change indicator of this application in the high temperature, and the time of discolouing is 10s the longest, can not appear discolouing the retention nature. The irreversible temperature change indicator prepared by the functional layer 2 has high phase transition speed, so that the irreversible temperature change indicator has high color development speed and excellent color development performance.
As a preferred embodiment, the phase change layer 21 is formed by solidifying a temperature change slurry, the temperature change slurry comprises a temperature change microcapsule and an auxiliary agent, the temperature change microcapsule comprises a first substance and a wall material for sealing the first substance, the wall material is made of a temperature change material, and the temperature change material causes the phase change layer 21 to generate phase change after the temperature reaches a preset temperature, so that the wall material of the temperature change microcapsule is broken, and the first substance is released. In the application, when the phase change layer 21 is applied to the temperature change indicator, when the external temperature of the temperature change indicator reaches a preset temperature, the phase change material in the phase change layer 21 changes into a phase change material, the wall material is broken, so that the phase change layer 21 becomes a transparent state, the transparent state can be permanently presented after the phase change material is generated, the wall material is broken and reacts very quickly after the temperature change microcapsule reaches the preset temperature, and the time that the functional layer 2 becomes the transparent state after the temperature change microcapsule reaches the preset temperature is shortened. Compared with the prior art, the TG value (temperature resistance value) of the wall material of the temperature change microcapsule can be accurately controlled, the temperature change microcapsules with different TG values are prepared, then the irreversible temperature change indicators with different accurate preset temperatures are prepared, and finally the irreversible temperature change indicators can accurately monitor the external environment where the equipment is located.
As a further preferred embodiment, the temperature-change material is one or more of polymethyl methacrylate, polyisocyanate, polyurea and polyamide. According to the method, the TG value of the wall material of the temperature change microcapsule is regulated and controlled by preparing the wall materials made of different materials, so that the indication temperature of the irreversible temperature change indicator is regulated and controlled. The indicating temperature of the irreversible temperature change indicator can be 30-200 ℃, such as: 37 deg.C, 45 deg.C, 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, 90 deg.C, 100 deg.C, 110 deg.C, 120 deg.C, etc.
As a preferred embodiment, the first substance is silicone oil, and preferably, the ratio of the silicone oil to the temperature-change material is 5:1 in percentage by mass; the absorbent layer 22 is paper. When the functional layer 2 is set to contain the temperature-change microcapsules, the core material of the temperature-change microcapsules is silicone oil, the wall material of the temperature-change microcapsules is broken when reaching a preset temperature, the silicone oil leaks out, the paper is soaked, and the paper and the phase change layer 21 become transparent, so that the bottom color layer 13 at the bottom is displayed, and the irreversible color development effect is achieved. The paper absorbs the silicone oil to quickly change into a transparent state, and the time for the functional layer 2 to change into the transparent state after reaching the preset temperature is also shortened.
As a preferred embodiment, a protective layer 3 is also provided on the side of the functional layer 2 facing away from the base layer 1. The protective layer 3 serves to protect the adsorption layer or the phase change layer 21 from being damaged.
In the application, the base layer 1 comprises a release layer 11, an adhesive layer 12 and a ground color layer 13 which are sequentially stacked, wherein the ground color layer 13 is arranged below the functional layer 2, so that the functional layer 2 is changed into a transparent state after the temperature reaches a preset temperature and then displays a color; the adhesive layer 12 is arranged below the bottom color layer 13, so that the irreversible temperature change indicator is attached to an article to be tested; the release layer 11 is detachably disposed below the adhesive layer 12. When being applied to waiting to monitor article with the irreversible temperature change indicator of using above-mentioned basic unit 1, remove earlier from type layer 11, use gluing agent layer 12 again and stick in on waiting to monitor article with irreversible temperature change indicator, the structural design of above-mentioned basic unit 1 is favorable to the preservation with irreversible temperature change indicator, and the operation is convenient, is favorable to marketing.
As a preferred embodiment, the base color layer 13 is prepared from a colored paste, which facilitates coating or printing, thereby preparing a uniform base color layer 13. Further, the colored paste includes an inorganic pigment having high temperature resistance, and the base color layer 13 is not damaged by excessive temperature when the irreversible temperature change indicator is at a high temperature. Preferably, the inorganic pigment is any one or more of chrome yellow, iron blue, cadmium red, cadmium yellow, lithopone, carbon black, iron oxide red and iron oxide yellow.
As a preferred embodiment, the adhesive layer 12 is a double-sided adhesive tape, and the structure of the double-sided adhesive tape is configured to facilitate adhesion of the release layer 11 and the ground color layer 13, or to facilitate preparation of the ground color layer 13. The double-sided adhesive is prepared from a single component, the single component is simple to operate, only corresponding adhesive is coated to form a film, and the single component can be any one of white oil adhesive, yellow hot melt adhesive, water adhesive and embroidery adhesive, but not limited to the white oil adhesive, the yellow hot melt adhesive, the water adhesive and the embroidery adhesive. The double-sided adhesive tape can also be prepared from multiple components, adhesives with different viscosities are mixed together to be prepared into the adhesives with different viscosities, so that the selectivity of the double-sided adhesive tape is increased, and the multiple components can be but are not limited to at least two of white oil adhesive, yellow hot melt adhesive, water adhesive and embroidery adhesive.
As a preferred embodiment, the auxiliary agent comprises an aqueous resin, and the auxiliary agent further comprises at least one of a dispersant, a leveling agent, a defoaming agent, and a thickener. The dispersant is a surfactant with two opposite properties of lipophilicity and hydrophilcity in a molecule, and mainly has the function of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquid, and simultaneously preventing the particles from settling and coagulating to form the amphipathy agent required by stable suspension. The leveling agent is mainly used for improving the printing leveling performance of the printing ink, and a flat, smooth and uniform coating film is formed in the drying film-forming process, so that the surface tension of the printing ink can be effectively reduced, and the leveling property and uniformity of the printing ink are improved. The defoaming agent is mainly used for reducing the surface tension of water, solution, suspension and the like, preventing foam from forming, or reducing or eliminating original foam, and finally playing a role in defoaming printing. The thickener has a function of a surfactant, and can be adsorbed on the surface of a dispersed phase to provide a certain hydrophilicity, thereby facilitating dispersion in a water system. The molecular weight distribution, concentration, solution temperature, and pH machine shear rate of the thickener all affect the viscosity of the solution. The temperature-change slurry with different properties is prepared by regulating the thickening agent.
The application also provides a preparation method of the irreversible temperature change indicator, the irreversible temperature change indicator comprises a base layer 1 and a functional layer 2, and the irreversible temperature change indicator is prepared by the following method: the functional layer 2 is stacked on the base layer 1, and the functional layer 2 becomes a transparent state after the temperature reaches a predetermined temperature so as to display the color of the base layer 1.
As a preferred embodiment, the base layer 1 includes a release layer 11, an adhesive layer 12 and a ground color layer 13, and the base layer 1 is prepared by the following method: uniformly spraying an adhesive material on any one surface of the release layer 11 to realize that an adhesive layer 12 is stacked on the release layer 11; slurry with colors is uniformly sprayed on the surface, far away from the release layer 11, of the adhesive layer 12, so that the bottom color layer 13 is stacked on the adhesive layer 12.
As a preferred embodiment, the functional layer 2 is stacked on the base color layer 13, the functional layer 2 includes a phase change layer 21, and the phase change layer 21 is prepared by the following method: s1, preparing temperature-change slurry; and S2, uniformly coating the temperature change slurry to form a film, and then curing to form the phase change layer 21.
As a preferred embodiment, the functional layer 2 further comprises an absorption layer 22, and the absorption layer 22 is prepared by the following method: when the absorption layer 22 includes only the first absorption layer 22 between the base color layer 13 and the phase change layer 21: preparing the first absorption layer 22 on the base color layer 13, uniformly coating the temperature change slurry on the first absorption layer 22, and then curing to form a phase change layer 21; or; when the absorption layer 22 only comprises a second absorption layer 22 on the surface of the phase-change layer 21 remote from the base-color layer 13: preparing the second absorption layer 22 directly on the surface of the phase change layer 21 away from the base color layer 13; or; when the absorption layer 22 comprises a first adsorption layer positioned between the base color layer 13 and the phase change layer 21 and a second adsorption layer positioned on the surface of the phase change layer 21 far away from the base color layer 13: the first absorption layer 22 is prepared on the base color layer 13, the temperature change slurry is uniformly coated on the first absorption layer 22 and then is solidified to form the phase change layer 21, and the second absorption layer 22 is prepared on the surface of the phase change layer 21 far away from the base color layer 13.
Aiming at the preparation method of the application, the application also provides the following embodiment for proving that the irreversible temperature change indicator can be successfully prepared by applying the method of the application, and the preparation method is simple. The prepared irreversible temperature change indicator is also subjected to performance test.
Example 1
This example produced an irreversible temperature change indicator with a predetermined temperature of 80 c, which exhibited a yellow color when the irreversible temperature change indicator reached the predetermined temperature of 80 c. The preparation steps of the irreversible temperature change indicator are as follows:
selecting polymethyl methacrylate (PMMA) with a TG value of 80 ℃ as a wall material of the temperature-change microcapsule, selecting silicone oil as a core material of the temperature-change microcapsule, and preparing the temperature-change microcapsule, wherein the ratio of the silicone oil to the PMMA is 5:1 by mass percent. And fully and uniformly stirring the temperature-change microcapsules, the water-based resin, the dispersing agent and the flatting agent to prepare temperature-change slurry for later use. Taking a release film as a release layer, uniformly spraying white oil adhesive on the release layer, drying to form a stacking arrangement of a white oil adhesive layer (an adhesive layer) on the release layer, uniformly printing slurry containing chrome yellow on the surface of the white oil adhesive layer far away from the release layer, drying to form a stacking arrangement of a bottom color layer (a bottom color layer) containing chrome yellow on the white oil adhesive layer, printing the prepared temperature change slurry on the bottom color layer containing chrome yellow, and drying at 50 ℃ to form a phase change layer. And adhering paper (an absorption layer) to the surface of the phase change layer, which is far away from the bottom color layer containing chrome yellow, covering the phase change layer, finally adhering a protective film (a protective layer) to the surface of the paper, which is far away from the phase change layer, and finishing the preparation of the irreversible temperature change indicator after adhering.
And (3) performance testing: tearing off the release film on the back of the prepared irreversible temperature change indicator with the preset temperature of 80 ℃, attaching the irreversible temperature change indicator to a heating table, raising the temperature to 90 ℃, continuously displaying white color on the irreversible temperature change indicator before the temperature is lower than 80 ℃, and instantly changing the irreversible temperature change indicator into yellow color after the temperature is raised to 80 ℃, wherein the reaction time is 5 s. The quality of the irreversible temperature change indicator product prepared by the embodiment is qualified, and the irreversible temperature change indicator can quickly indicate the change condition of the external temperature through color change after the external temperature reaches the preset temperature.
Example 2
This example produced an irreversible temperature change indicator with a predetermined temperature of 37 c that appeared red when it reached a predetermined temperature of 37 c. The preparation steps of the irreversible temperature change indicator are as follows:
polymethyl methacrylate (PMMA) with a TG value of 37 ℃ is selected as a wall material of the temperature-change microcapsule, silicone oil is selected as a core material of the temperature-change microcapsule, and the ratio of the silicone oil to the PMMA is 5:1 by mass percent, so that the temperature-change microcapsule is prepared. And fully and uniformly stirring the temperature-change microcapsules, the water-based resin, the dispersing agent and the flatting agent to prepare temperature-change slurry for later use. The method comprises the following steps of taking a release film as a release layer, uniformly spraying water gel on the release layer, drying, forming a stacking arrangement of a water gel layer (an adhesive layer) on the release layer, uniformly printing slurry containing iron oxide red on the surface, far away from the release layer, of the water gel layer, forming a stacking arrangement of a bottom color layer (a bottom color layer) containing iron oxide red on the water gel layer after drying, printing the prepared temperature-change slurry on the bottom color layer containing iron oxide red, and drying at 50 ℃ to form a phase change layer. And adhering paper (an absorption layer) to the surface of the phase change layer, which is far away from the bottom color layer containing the iron oxide red, covering the phase change layer, and finally adhering a protective film (a protective layer) to the surface of the paper, which is far away from the phase change layer, so that the preparation of the irreversible temperature change indicator is completed after the adhesion.
And (3) performance testing: and (3) tearing off the release film on the back of the prepared irreversible temperature change indicator with the preset temperature of 37 ℃, attaching the release film to a heating table, raising the temperature to 40 ℃, continuously presenting a white color to the irreversible temperature change indicator before the temperature is lower than 37 ℃, and instantly changing the irreversible temperature change indicator into a red color after the temperature is raised to 37 ℃, wherein the reaction time is 3 s. The quality of the irreversible temperature change indicator product prepared by the embodiment is qualified, and the irreversible temperature change indicator can quickly indicate the change condition of the external temperature through color change after the external temperature reaches the preset temperature.
Example 3
This example produced an irreversible temperature change indicator with a predetermined temperature of 120 c, which appeared blue when it reached the predetermined temperature of 120 c. The preparation steps of the irreversible temperature change indicator are as follows:
polymethyl methacrylate (PMMA) with a TG value of 120 ℃ is selected as a wall material of the temperature-change microcapsule, silicone oil is selected as a core material of the temperature-change microcapsule, and the ratio of the silicone oil to the PMMA is 5:1 in percentage by mass, so that the temperature-change microcapsule is prepared. And fully and uniformly stirring the temperature-change microcapsules, the water-based resin, the dispersing agent and the flatting agent to prepare temperature-change slurry for later use. The method comprises the following steps of taking a release film as a release layer, uniformly spraying white oil adhesive on the release layer, drying, forming a stacking arrangement of a white oil adhesive layer (an adhesive layer) on the release layer, uniformly printing sizing agent containing iron blue on the surface, far away from the release layer, of the white oil adhesive layer, drying, forming a stacking arrangement of a bottom color layer (a bottom color layer) containing iron blue on the white oil adhesive layer, printing the prepared temperature-variable sizing agent on the bottom color layer containing iron blue, and drying at 50 ℃ to form a phase change layer. And adhering paper (an absorption layer) to the surface of the phase change layer, which is far away from the bottom color layer containing the iron oxide red, covering the phase change layer, and finally adhering a protective film (a protective layer) to the surface of the paper, which is far away from the phase change layer, so that the preparation of the irreversible temperature change indicator is completed after the adhesion.
And (3) performance testing: tearing off the release film on the back of the prepared irreversible temperature change indicator with the preset temperature of 120 ℃, attaching the irreversible temperature change indicator to a heating table, raising the temperature to 125 ℃, continuously displaying white color on the irreversible temperature change indicator before the temperature is lower than 120 ℃, and instantly changing the irreversible temperature change indicator into blue color after the temperature is raised to 120 ℃, wherein the reaction time is 4 s. The quality of the irreversible temperature change indicator product prepared by the embodiment is qualified, and the irreversible temperature change indicator can quickly indicate the change condition of the external temperature through color change after the external temperature reaches the preset temperature. The irreversible temperature change indicator of the present embodiment can be used for high temperature monitoring of electric wires and cables.
To sum up, the present application provides an irreversible temperature change indicator, the color rendering principle of which is: when the irreversible temperature change indicator is applied to equipment to be monitored, before the temperature does not reach the preset temperature, the color of the base layer cannot be seen due to the translucency of the functional layer, and after the temperature reaches the preset temperature, the functional layer is changed into a transparent state, so that the color of the base layer is displayed. The sticker can be widely applied to monitoring local high temperature or short circuit overheating of various precision instruments, power cables and other high-voltage equipment. When the irreversible temperature indicator is applied to equipment such as precision instruments, power cables and the like, if local high temperature or short circuit overheat occurs, the irreversible temperature indicator can correspondingly carry out local color development, so that the complexity in the whole searching process is reduced, and the personnel safety problem to high-voltage equipment in the checking process is also reduced. In addition, the irreversible temperature change indicator provided by the application is simple to operate and has a wide application market.
Although the present description has been described in terms of embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and it is to be understood that those skilled in the art will recognize that the embodiments described herein may be combined as a whole to form other embodiments as would be understood by those skilled in the art.
The above-listed detailed description is merely a detailed description of possible embodiments of the present invention, and it is not intended to limit the scope of the invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention are intended to be included within the scope of the present invention.
Claims (14)
1. An irreversible temperature change indicator, which is characterized by comprising a base layer and a functional layer which are arranged in a stacking way,
the functional layer becomes an irreversible transparent state after the temperature reaches a predetermined temperature for displaying the color of the base layer.
2. The irreversible temperature change indicator of claim 1 wherein the functional layer comprises a phase change layer and an absorber layer disposed in a stack, the absorber layer being disposed on at least one surface of the phase change layer;
the phase change layer is subjected to phase change after the temperature reaches a preset temperature so as to present a transparent state, and a first substance is released;
the absorption layer is used for absorbing the first substance released after the phase change of the phase change layer and presents a transparent state.
3. The irreversible temperature change indicator of claim 2, wherein the phase change layer is formed by curing a temperature change slurry, the temperature change slurry comprises temperature change microcapsules and an auxiliary agent, the temperature change microcapsules comprise a first substance and a wall material for sealing the first substance, and the wall material is made of a temperature change material, and the temperature change material causes the phase change layer to generate phase change after the temperature reaches a preset temperature, so that the wall material of the temperature change microcapsules is broken and the first substance is released.
4. An irreversible temperature change indicator according to claim 3, characterized in that the temperature change material is one or several of polymethylmethacrylate, polyisocyanate, polyurea, polyamide.
5. The irreversible temperature change indicator of claim 2 wherein said first substance is a silicone oil; the absorbing layer is paper.
6. The irreversible temperature change indicator of claim 1 wherein the side of the functional layer remote from the base layer is further provided with a protective layer.
7. The irreversible temperature change indicator of claim 1 wherein the base layer comprises a release layer, an adhesive layer and a base color layer stacked in this order,
the bottom color layer is arranged below the functional layer, so that the functional layer is changed into a transparent state after the temperature reaches a preset temperature and then displays colors;
the adhesive layer is arranged below the bottom color layer so that the irreversible temperature change indicator is attached to an article to be tested;
the release layer is detachably arranged below the adhesive layer.
8. The irreversible temperature change indicator of claim 7 wherein the basecoat is prepared from a colored paste comprising inorganic pigments selected from the group consisting of chrome yellow, iron blue, cadmium red, cadmium yellow, lithopone, carbon black, iron oxide red, and iron oxide yellow.
9. The irreversible temperature change indicator of claim 7, wherein the adhesive layer is a double-sided adhesive tape, the double-sided adhesive tape is prepared from a single component or multiple components, the single component is any one of white oil glue, yellow hot melt glue, water glue and embroidery glue, and the multiple components are at least two of white oil glue, yellow hot melt glue, water glue and embroidery glue.
10. The irreversible temperature change indicator of claim 3 wherein the auxiliary agent comprises an aqueous resin, the auxiliary agent further comprising at least one of a dispersant, a leveling agent, an antifoaming agent, and a thickener.
11. The preparation method of the irreversible temperature change indicator is characterized in that the irreversible temperature change indicator comprises a base layer and a functional layer, and the irreversible temperature change indicator is prepared by the following method:
and stacking the functional layers on the base layer, wherein the functional layers are changed into a transparent state after the temperature reaches a preset temperature so as to display the color of the base layer.
12. The method of manufacturing an irreversible temperature change indicator according to claim 11, wherein the base layer comprises a release layer, an adhesive layer and a base color layer, and the base layer is manufactured by the following method:
uniformly spraying an adhesive material on any one surface of the release layer to realize that the adhesive layer is stacked on the release layer;
slurry with colors is uniformly sprayed on the surface, far away from the release layer, of the adhesive layer, so that a bottom color layer is stacked on the adhesive layer.
13. The method of making an irreversible temperature change indicator according to claim 12 wherein the functional layer is stacked on the primer layer, the functional layer comprising a phase change layer, the phase change layer being prepared by:
s1, preparing temperature-change slurry;
and S2, uniformly coating the temperature change slurry to form a film, and then curing to form the phase change layer.
14. The method of making an irreversible temperature change indicator according to claim 13 wherein the functional layer further comprises an absorber layer, the absorber layer being prepared by:
when the absorption layer includes only the first absorption layer between the base color layer and the phase change layer: preparing the first absorption layer on the bottom color layer, uniformly coating the temperature change slurry on the first absorption layer, and then curing to form a phase change layer; or;
when the absorption layer only includes a second absorption layer on a surface of the phase change layer remote from the base color layer: preparing the second absorption layer directly on the surface of the phase change layer far away from the bottom color layer; or;
when the absorption layer includes the first adsorption layer that is located the end chromatograph with between the phase transition layer and being located the phase transition layer keep away from the second adsorption layer on the surface of end chromatograph: preparing the first absorption layer on the base color layer, uniformly coating the temperature change slurry on the first absorption layer, curing to form a phase change layer, and preparing the second absorption layer on the surface of the phase change layer far away from the base color layer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187452.XA CN114623949A (en) | 2022-02-28 | 2022-02-28 | Irreversible temperature change indicator and preparation method thereof |
| PCT/CN2022/143263 WO2023160233A1 (en) | 2022-02-28 | 2022-12-29 | Irreversible temperature change indicator and manufacturing method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210187452.XA CN114623949A (en) | 2022-02-28 | 2022-02-28 | Irreversible temperature change indicator and preparation method thereof |
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| CN114623949A true CN114623949A (en) | 2022-06-14 |
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| WO (1) | WO2023160233A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023160233A1 (en) * | 2022-02-28 | 2023-08-31 | 江苏集萃智能液晶科技有限公司 | Irreversible temperature change indicator and manufacturing method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2004050506A1 (en) * | 2002-12-03 | 2004-06-17 | Henry Norrby | s PACKAGE FOR STORING GOODS IN A PRESERVATIVE STATES, A METHOD FOR MARKING SUCH A PACKAGE, AS WELL AS A TEMPERATURE INDICATOR FOR THE PACKAGE |
| CN100451584C (en) * | 2006-08-15 | 2009-01-14 | 慧坦科技股份有限公司 | Method for monitoring conductive wire working temperature abnormity |
| US9902861B2 (en) * | 2014-06-21 | 2018-02-27 | Klt Technologies | Single color reversible temperature indicator |
| CN104361826A (en) * | 2014-11-14 | 2015-02-18 | 深圳九星印刷包装集团有限公司 | Temperature and time recording mark |
| CN112284564A (en) * | 2020-11-30 | 2021-01-29 | 丝艾（合肥）包装材料有限公司 | Temperature sensing warning indicator and preparation method thereof |
| CN113999668B (en) * | 2021-08-18 | 2023-12-19 | 江苏集萃先进高分子材料研究所有限公司 | Irreversible color-changing microcapsule and preparation method thereof |
| CN114623949A (en) * | 2022-02-28 | 2022-06-14 | 江苏集萃智能液晶科技有限公司 | Irreversible temperature change indicator and preparation method thereof |
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| WO2023160233A1 (en) * | 2022-02-28 | 2023-08-31 | 江苏集萃智能液晶科技有限公司 | Irreversible temperature change indicator and manufacturing method therefor |
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