CN112556872A

CN112556872A - Environment-friendly irreversible temperature label

Info

Publication number: CN112556872A
Application number: CN201910852714.8A
Authority: CN
Inventors: 徐瑞菡; 徐天华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-03-26

Abstract

The invention discloses an environment-friendly irreversible temperature tag which comprises an oil absorption layer, grease and a mark, wherein the grease covers the mark in a solid state and covers the mark, the oil absorption layer is arranged below or around the grease, when the grease is liquefied by heat, the oil absorption layer absorbs the grease, and the mark originally covered by the grease is displayed. The temperature tag is convenient to use, observe and store, is an irreversible tag, and can effectively prompt whether a measured object is subjected to an over-temperature environment, so that whether deterioration or invalidation is possible is judged; the label is made of edible grade materials, is safe and environment-friendly, and has no risk to health; meanwhile, the invention has low cost and convenient manufacture, and is suitable for large-scale production and application in low-value products.

Description

Environment-friendly irreversible temperature label

Technical Field

The invention relates to the field of food detection, in particular to an environment-friendly irreversible temperature label and a detection method thereof.

Background

In life, many articles need to be transported and stored through a cold chain, and will deteriorate or lose efficacy if subjected to an over-temperature environment, for example, yogurt needs to be stored at a low temperature, and will deteriorate if the low-temperature environment is lost, probiotic drinks will die in a large amount if the low-temperature environment is lost, and some vaccines, medicines or blood products will cause a great risk of losing efficacy if the cold chain management is not performed.

In many cases, these products requiring cold chain management may experience only a short time in an over-temperature environment, and although they are still in the cold chain when they are finally used by the user, it is likely that the short time of over-temperature exposure has already affected the product, and therefore, an irreversible temperature tag is needed to determine whether the article has experienced an over-temperature environment.

Meanwhile, some existing low-value articles such as yoghourt and probiotics can only be opened to judge whether the articles are not deteriorated, and for the probiotics, common consumers cannot know how many live bacteria exist when drinking. Therefore, the over-temperature indication for each low-value product by using a safe, environment-friendly and cheap temperature label has great practical value.

In other fields, for example, the cable can produce high fever when the overload work, can destroy the cable structure, has very big influence to the security and the stability of cable, consequently, need have a simple and easy temperature label to indicate to the stability of the cable of overtemperature need in time be changed in order to guarantee the system.

The existing temperature control labels mainly comprise the following types:

the temperature recording label made by the electronic chip has detailed recording, can be managed in a centralized way and can be used for data tracing, but the electronic label has high cost and cannot be used in daily life food, and the electronic label also needs professional equipment to read, so that people can not find problems intuitively without tools; secondly, the temperature recording label made of the color-changing ink is a special chemical substance, different colors can be generated when the temperature changes, so that the temperature of an object can be easily identified, but most of the color-changing inks can be changed back to the original color when the temperature returns to low temperature again, so that whether the color-changing inks are subjected to high temperature cannot be indicated, although few color-changing inks can maintain the color development state of the highest temperature, the color-changing inks are chemical substances, some heavy metal components exist, more or less toxicity exists, and the color-changing inks are not suitable for being used on food, medicines and biological products.

Patent CN100387951C discloses a temperature sensing label, which uses petroleum wax as indicator, and coats petroleum wax powder on the surface of colored paper with specific adhesive material by special process, when the temperature changes, the petroleum wax powder will melt and be transparent, and display the color of the colored paper, when the temperature is cooled again, the paraffin becomes block-shaped, and will become semitransparent, so that the display effect is different from the colored paper covered by the powder. This structure technology is complicated, and the paraffin powder needs to have special device to smash, needs complicated binder when the petroleum wax powder is paintd on the colored paper, still needs to use organic solvent, and after painting the completion, still need wait for organic solvent natural volatilization, the time is longer. Petroleum wax can be vaporized at a certain temperature, and a four-layer structure is also needed to ensure the performance structurally, so that the petroleum wax has high stability difficulty and poor stability. The petroleum wax powder is changed into the petroleum wax solid, the non-transparency is changed into the translucency, and the deviation is easy to appear by naked eyes.

Disclosure of Invention

The invention aims to provide an environment-friendly irreversible temperature label and a detection method thereof aiming at the defects of the prior art, wherein the label is nontoxic and harmless, is suitable for food, medicines and the like, and has high discrimination.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an environmental protection irreversible temperature label, oil absorption layer, grease and mark, the grease covers the mark top and covers the mark with solid state form, the oil absorption layer is located grease below or around, works as the grease is heated the liquefaction back, and the oil absorption layer absorbs the grease to show the mark of grease layer below. The selected oil is opaque in the solid state.

Further, when the oil absorption layer is located around the grease, the temperature tag further comprises a substrate, the mark is arranged on the substrate, and the oil absorption layer is arranged above the substrate and located around the mark.

Furthermore, when the oil absorption layer is positioned below the grease, the mark of the temperature label is arranged on the oil absorption layer, and the oil absorption layer is arranged below the grease layer.

Furthermore, the temperature label also comprises a transparent cover plate or a cover film, and the transparent cover plate or the cover film covers the grease and the oil absorption layer.

Furthermore, the mark is arranged on the oil absorption layer and below the oil absorption layer.

Further, the oil absorption layer is oil absorption paper or other oil absorption materials.

Furthermore, the middle of the oil absorption layer is hollowed, and the hollowed part is used for exposing a mark.

Further, the oil is edible oil.

Further, the oil and fat is one or more mixed edible oil and fat with the melting point of-20 to 70 degrees.

Further, based on the detection method of the environment-friendly irreversible temperature label, the temperature label with proper temperature indication is selected according to the detection requirement to be placed or adhered on the outer package of the article to be sold, transported or stored, when the temperature requirement of the storage environment is met in the process of selling, transporting or storing the article, the temperature label keeps the label covered, when the temperature requirement of the storage environment is not met in the process of selling, transporting or storing the food, the temperature limit value is exceeded, the grease is liquefied and absorbed by the oil absorption layer, namely the covered label is exposed, even if the temperature is reduced below the limit temperature again, the label cannot be covered again because the grease layer is absorbed, and therefore the condition that the label has been subjected to the over-temperature environment can be judged.

Furthermore, the temperature label after the mark is exposed does not change the mark exposure degree along with the change of the external temperature.

Furthermore, the temperature label can be applied to articles needing whole-process cold chain transportation and storage, such as food, medicines, vaccines and the like, and can also be applied to other fields sensitive to overtemperature processes, such as power cables and the like.

By adopting the technical scheme of the invention, the invention has the beneficial effects that: compared with the prior art, the temperature tag is convenient to use, observe and store, is an irreversible tag, and can effectively prompt whether a measured object is subjected to an over-temperature environment, so that whether deterioration or failure is possible is judged; the label is made of edible grade materials, is safe and environment-friendly, and has no risk to health; meanwhile, the invention has low cost and convenient manufacture, and is suitable for large-scale production and application in low-value products.

Drawings

FIG. 1 is a structural diagram of an embodiment of an environment-friendly irreversible temperature tag provided by the present invention

Fig. 2 is a second structural diagram of an embodiment of an environment-friendly irreversible temperature tag provided by the invention.

FIG. 3 is a cross-sectional view of the structure of FIG. 1;

FIG. 4 is a cross-sectional view of the structure of FIG. 2

The oil absorption layer is 1, the oil absorption layer is 2, the grease is 3, the mark is 4, the substrate is 5, and the transparent cover plate is arranged.

Detailed Description

Specific embodiments of the present invention will be further described with reference to the accompanying drawings.

As shown in the figure, an environmental protection irreversible temperature label, oil absorption layer 1, grease 2 and mark 3, grease 2 covers mark 3 top and covers mark 3 with solid state form, oil absorption layer 1 locates grease 2 below or around, works as after grease 2 preheats the liquefaction, oil absorption layer 1 absorbs grease 2. The oil absorption layer 1 is oil absorption paper.

In the first embodiment, as shown in fig. 1, the temperature tag further includes a substrate 4, the mark 3 is disposed on the substrate 4, and the oil absorption layer 1 is disposed above the substrate 4 and around the mark 3. The temperature label also comprises a transparent cover plate 5, and the transparent cover plate 5 covers the grease 2 and the oil absorption layer 1. The middle of the oil absorption layer 1 is hollowed, and the hollowed part is used for exposing the mark 3. After the grease 2 is melted and absorbed by the surrounding oil absorption layer 1, the mark 3 is exposed, and the mark 3 cannot be covered by freezing and cooling again.

The "fail" word in fig. 1 indicates a mark 3, and the mark 3 is provided on a substrate 4. The "failure" word is revealed after the grease 2 filled in the figure is completely melted and absorbed. The small rectangular frame around the 'failure' two-character is a hollow-out part of the oil absorption layer and is used for exposing the mark 3 after the grease 2 is absorbed. In the figure, the oil absorption layer 1, the substrate 4 and the transparent cover plate 5 are rectangular structures with slightly different sizes, and in practical application, the rectangular structures with the same size or other circular or polygonal structures can be used.

In the second embodiment, as shown in fig. 2, the mark is provided on the oil absorption layer 1. The grease 2 covers the indicia 3, i.e. also the oil absorption layer 1. When the oil 2 is melted and absorbed by the oil absorption layer 1, the mark 3 is exposed, and the mark 3 cannot be covered by freezing and cooling again. A transparent cover plate 5 can be arranged above the oil absorption layer 1 and the grease 2 to be used as a protective layer.

The "failure" word in fig. 2 is the mark 3, and the mark 3 is arranged on the oil absorption layer 1. The "failure" word is revealed after the grease 2 filled in the figure is completely melted and absorbed. In the figure, the oil absorption layer 1 and the transparent cover plate 5 are rectangular structures with slightly different sizes, and in practical application, the rectangular structures with the same size or other circular or polygonal structures can be used.

The substrate 4 can also be disposed in this embodiment, so that the oil absorption layer 1 is more firmly fixed.

The mark 3 of the above embodiment may be a figure or a character printed on the oil absorbing layer 1, or a figure or a character printed, adhered and adhered on the substrate. The transparent cover 5 may be made of transparent plastic or the like.

The oil 2 is edible oil. Preferably, the oil 2 is one or more mixed edible oil with the melting point of-20 to 70 degrees. For example, low melting olive oil (0 ℃ to 10 ℃), sunflower oil (-10 ℃ to-20 ℃), corn oil (-10 ℃ to-15 ℃) coconut oil (20 ℃ to 25 ℃), lard (30 ℃ to 35 ℃), butter (35 ℃ to 45 ℃), edible beeswax (60 ℃ to 70 ℃) are actually mixtures of some fatty acids, so that it is easy to prepare oils in a suitable temperature range according to the temperature requirement. The oil is edible, so it is safe and harmless.

Based on the detection method of the environment-friendly irreversible temperature label, the initial temperature label is placed or adhered on an outer package of an article to be sold, transported or stored, when the temperature of the article in the process of sale, transportation or storage accords with the temperature of the storage environment, the temperature label keeps the mark 3 covered, and when the temperature of the article in the process of sale, transportation or storage does not accord with the storage environment (exceeds the limited temperature), the grease 2 is liquefied and absorbed by the oil absorption layer 1, namely the covered mark 3 is exposed. The temperature label can also be placed in an integral packaging box and the like, and is pasted and placed according to actual requirements.

The temperature label after the mark 3 is exposed does not change the exposure degree of the mark 3 along with the change of the external temperature.

The temperature label can be applied to articles needing whole-process cold chain transportation and storage, such as food, medicines, vaccines and the like, and can also be applied to other fields sensitive to overtemperature processes, such as power cables and the like.

The invention takes the following sets of experiments as examples:

example one, temperature labeling for yogurt:

the generally recommended storage temperature for yogurt is 4-10 ℃.

Palm oil of 12 degrees is used as the covering grease, and the melting point of the palm oil is between 10 and 12 ℃.

Experimental examples the structure described in example one, i.e., the substrate type, was used.

The height of the grease layer is 1mm, and the length and the width are 5mm and 5 mm; the thickness of the oil absorption paper is 2mm, the failure mark is positioned on the substrate, the preservative film is used as the covering film, and the plastic sheet is used as the substrate.

When the article is placed in an environment at 15 ℃, the oil layer is melted after 122 seconds, and the mark is absorbed by the lower oil absorption layer and appears.

When the article is placed in an environment at 25 ℃, the oil layer is melted after 54 seconds, and the mark is absorbed by the lower oil absorption layer and appears.

When the article is placed in an environment with the temperature of 35 ℃, the oil layer is melted after 25 seconds, and is absorbed by the lower oil absorption layer, so that the mark appears.

The sensitivity of the temperature label can be adjusted by adjusting three indexes of the base plate and the cover film material (the better the heat conductivity is, the more sensitive the label is), the grease using amount (the less the using amount is, the more sensitive the label is), and the oil absorption layer material (the better the oil absorption performance is, the more sensitive the oil absorption layer is).

Example two, temperature signature for live vaccine:

a typical recommended storage temperature for live vaccines is below-15 ℃.

Sunflower oil is used as the covering oil, and the melting point of the covering oil is between-14 ℃ and 15 ℃.

The experimental example employed the structure described in example two, i.e., the no-substrate type.

The height of the grease layer is 1mm, and the length and the width are 3mm and 3 mm; the thickness of the oil absorption paper is 2mm, the failure mark is positioned on the oil absorption layer, and the preservative film is used as the covering film.

When the article is placed in an environment with the temperature of minus 10 ℃, the oil layer is melted after 133 seconds, and is absorbed by the lower oil absorption layer, so that the mark appears.

When the article is placed in an environment at 0 ℃, the oil layer is melted after 52 seconds, and is absorbed by the lower oil absorption layer, so that the mark appears.

When the article is placed in an environment with the temperature of 10 ℃, the oil layer is melted after 21 seconds, and is absorbed by the lower oil absorption layer, so that the mark appears.

Example three, temperature labeling for polyethylene insulated cables:

polyethylene insulated cables generally recommend a maximum operating temperature of 70 ℃.

Refined beeswax is used as covering grease, and the melting point of the refined beeswax is between 70 and 72 ℃.

The height of the grease layer is 1mm, and the length and the width are 5mm and 5 mm; the thickness of the oil absorption paper is 2mm, the failure mark is positioned on the oil absorption paper, and an acrylic plate (with the thickness of 0.5mm) is used as a covering film.

When the article is placed in an environment with the temperature of 75 ℃, the oil layer is melted after 85 seconds, and is absorbed by the lower oil absorption layer, so that the mark appears.

When the article is placed in an environment at 95 ℃, the oil layer is melted after 33 seconds, and the mark is absorbed by the lower oil absorption layer and appears.

When the article is placed in an environment at 105 ℃, the oil layer is melted after 21 seconds, and the mark is absorbed by the lower oil absorption layer and appears.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides an environmental protection irreversible temperature label, its characterized in that, oil absorption layer, grease and mark, the grease covers the mark top and covers the mark with solid state form, the grease is solid-state opaque, the oil absorption layer is located grease below or around, works as the grease preheats the liquefaction back, and the oil absorption layer absorbs the grease.

2. The environmentally irreversible temperature tag of claim 1 wherein the temperature tag further comprises a substrate, the indicia is disposed on the substrate, and the oil absorbing layer is disposed over the substrate and around the indicia.

3. The environmentally irreversible temperature tag of claim 2 further comprising a transparent cover plate or film overlying the grease and oil absorbent layer.

4. The environmentally irreversible temperature tag of claim 1 wherein the indicia is disposed on the oil absorbent layer.

5. The environmentally irreversible temperature tag of claim 1 wherein the oil absorbing layer is an oil absorbing paper.

6. The environmentally irreversible temperature tag of claim 2 wherein the oil absorbing layer is hollowed out, and the hollowed-out is used for revealing a mark.

7. The environmentally irreversible temperature tag of claim 1 wherein the oil is an edible oil.

8. The environmentally irreversible temperature tag of claim 1 wherein the fat is one or more blended edible fats having a melting point of-20 to 70 degrees.

9. The method for detecting an environmentally friendly irreversible temperature tag as claimed in claim 1, wherein the temperature tag with a suitable temperature indication is selected according to the detection requirement and placed or adhered on an outer package of an article to be sold, transported or stored, when the temperature requirement of the storage environment is met during the sale, transportation or storage of the article, the temperature tag keeps the tag covered, when the storage environment is not met during the sale, transportation or storage of the food, the grease liquefaction is absorbed by the oil absorption layer, namely the covered tag is exposed, even if the temperature is reduced below the defined temperature again, the tag cannot be covered again because the grease layer is absorbed, so that the situation that the tag has been subjected to the over-temperature environment can be judged.

10. The method for detecting the environment-friendly irreversible temperature label as claimed in claim 9, wherein the temperature label after being exposed is not exposed to change the degree of exposure of the label with the change of the external temperature.