CN112662331A - Cold chain transportation safety label sticker and production process thereof - Google Patents
Cold chain transportation safety label sticker and production process thereof Download PDFInfo
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- CN112662331A CN112662331A CN202011510390.9A CN202011510390A CN112662331A CN 112662331 A CN112662331 A CN 112662331A CN 202011510390 A CN202011510390 A CN 202011510390A CN 112662331 A CN112662331 A CN 112662331A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000002121 nanofiber Substances 0.000 claims abstract description 55
- 239000010410 layer Substances 0.000 claims abstract description 43
- 238000009987 spinning Methods 0.000 claims abstract description 25
- 238000007639 printing Methods 0.000 claims abstract description 23
- 239000011241 protective layer Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000010408 film Substances 0.000 claims description 29
- 229920000642 polymer Polymers 0.000 claims description 22
- 229920002635 polyurethane Polymers 0.000 claims description 15
- 239000004814 polyurethane Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 229920001610 polycaprolactone Polymers 0.000 claims description 13
- 239000004632 polycaprolactone Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 6
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 229920006299 self-healing polymer Polymers 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000010041 electrostatic spinning Methods 0.000 claims description 5
- 239000013005 self healing agent Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229920000297 Rayon Polymers 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 3
- 239000004626 polylactic acid Substances 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims 1
- 235000013611 frozen food Nutrition 0.000 abstract description 3
- -1 and S4 Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 10
- 235000013305 food Nutrition 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229920006037 cross link polymer Polymers 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 206010016952 Food poisoning Diseases 0.000 description 1
- 208000019331 Foodborne disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention provides a cold chain transportation safety label sticker which sequentially comprises the following components from bottom to top: the color-changing nano-fiber film layer can be changed into a transparent color at normal temperature or high temperature to expose the printing layer. A production process of the cold chain transportation safety label sticker comprises the following steps: s1, printing a mark, S2, preparing spinning solution, S3, preparing a color-changing nanofiber film layer, and S4, coating a transparent protective layer. The color-changing nanofiber film layer is opaque and white initially, the nanofiber film is opaque and white in a low-temperature state, so that a label character cannot be seen behind, and when the nanofiber film is in a normal-temperature or high-temperature state for a certain time, the nanofiber film can become transparent, so that the character of an inedible label can be seen clearly, and whether frozen food is deteriorated or not can be judged obviously by naked eyes.
Description
Technical Field
The invention relates to the technical field of cold chain transportation safety, in particular to a cold chain transportation safety label and a production process thereof.
Background
With the rapid development of the cold chain transportation industry in China, the requirement of people on cold chain preservation is gradually improved, more attention is paid to frozen preserved food, when the frozen or refrigerated food is exposed to normal temperature or high temperature, bacteria usually start to breed and reproduce, however, as certain bacteria do not influence the taste and smell of the food, whether the food is deteriorated or not is difficult to visually check out by naked eyes, and the appearance of most frozen foods in the market is almost the same even if the frozen foods are frozen again after being melted. Therefore, many people mistakenly eat deteriorated food which cannot be obviously perceived, and food poisoning is caused, so that the life and health of people are greatly harmed.
There is a need for a new type of product that can easily and clearly identify whether food is spoiled or not, and that can solve the above problems.
Disclosure of Invention
The invention provides a cold chain transportation safety label and a production process thereof, which solve the problem that whether food is deteriorated or not is difficult to clearly distinguish in the existing cold chain transportation process by carrying out technical transformation on the existing equipment.
In order to solve the technical problems, the invention specifically adopts the following technical scheme:
the utility model provides a cold chain transportation security label pastes, follows supreme being in proper order down: the color-changing nano-fiber film layer can be changed into a transparent color at normal temperature or high temperature to expose the printing layer.
Preferably, the transparent protective layer is a release film layer.
A production process of the cold chain transportation safety label sticker comprises the following steps:
s1, printing a mark, coating viscose on the bottom surface of the printing layer substrate, and printing an inedible mark word on the upper surface of the printing layer substrate;
s2, preparing a spinning solution, adding 10-30 parts by weight of polymer into 90-100 parts by weight of solvent at room temperature, stirring by using a magnetic stirrer, completely dissolving the polymer, and uniformly mixing to obtain the spinning solution;
s3, preparing a color-changing nanofiber thin film layer, spinning the spinning solution obtained in the step S2 for 30-60min by using an electrostatic spinning machine under the conditions that the temperature is 20-50 ℃, the relative humidity is 20-90%, the spinning voltage is 2-40 kv, the spinning distance is 8-30 cm and the injection speed is 0.2-10.0 ml/h, so as to obtain the color-changing nanofiber thin film layer, and spraying the color-changing nanofiber thin film layer on the upper surface of the printing layer obtained in the step S1;
and S4, coating a transparent protective layer, and covering the transparent protective layer on the outer surface of the color-changing nanofiber film layer to obtain a finished label.
Preferably, the weight ratio of the polymer to the solvent is 10-20: 80-100 parts.
Preferably, the polymer is one or more self-healing polymer material selected from polyurethane, polylactic acid, polystyrene, cellulose acetate, polyethylene oxide, polystyrene, polycaprolactone or polyvinylpyrrolidone.
Preferably, the self-healing polymer is composed of 40-80% of polyurethane and 20-60% of polycaprolactone by mass; the molecular weight of the polyurethane is 7000-10000, and the melting transition temperature Tm is 26-28 ℃; the molecular weight of the self-healing agent polycaprolactone is 30000-40000, and the melting temperature Tm is 30-32 ℃.
Preferably, the solvent is one or more solvents selected from methanol, ethanol, trifluoroacetic acid, acetone, chloroform, ethanol, N-dimethylformamide or dimethylsulfoxide.
Preferably, the polymer is added and then the mixture is continuously stirred for 20 to 30 hours at the rotating speed of 10 to 1000 rpm.
Preferably, the diameter of the nanofiber obtained by spinning the polymer spinning solution is 100-1000 nm; the thickness of the color-changing nanofiber film layer is 0.05-5.0 mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses self-healing polyurethane and self-healing macromolecules as raw materials and sprays out a nano fiber film by an electrostatic spinning method by taking thermodynamic free energy as a principle. The back of the nanofiber membrane is pasted with an inedible label character, and due to the fact that the high molecular structure of the nanofiber membrane is stable at low temperature, the high molecular thin lines are crossed vertically and horizontally, when light rays enter the nanofiber membrane, the high molecular thin lines which are crossed vertically and horizontally can reflect the incident light rays, and the light rays are scattered and cannot penetrate through the nanofiber membrane, so that the nanofiber membrane is opaque. However, when the nanofiber film is exposed at normal temperature or high temperature, the criss-cross polymer fine wire structure collapses, and a self-healing process is started, so that the fine wires start to melt, mutually wind and fuse together. At this time, the incident light penetrates through the nanofiber film to make the nanofiber film look transparent, so that the character of the inedible label behind the nanofiber film can be obviously seen.
The cold chain transportation safety label can be divided into three types of freezing, refrigerating and high temperature according to the requirements of cold chain transportation temperature. The temperature at the time of cold chain is set to make it opaque and the time of exposure at normal or high temperature is set to make it opaque by adjusting the thickness of the nanofiber film. (for example, the nanofiber film is adjusted to a certain thickness and stored at a low temperature of-10 ℃ so as to be opaque, and if the nanofiber film is taken out and exposed for 1 hour at the normal temperature, the nanofiber film becomes transparent, and the word of the 'inedible' label on the back is displayed.)
Drawings
FIG. 1 is a schematic view of a label according to the present invention;
FIG. 2 is a flow chart of the process steps of the present invention;
FIG. 3 is a graph showing the time-dependent behavior of the label according to the present invention at normal temperature;
description of reference numerals: adhesive layer 1, printing layer 2, color-changing nanofiber thin layer 3, transparent protective layer 4.
Detailed Description
The details of the present invention will be described below with reference to the accompanying drawings and examples.
As shown in fig. 1-2, the present embodiment provides a cold chain transportation security tag label, which sequentially comprises from bottom to top: the color-changing nano-fiber film comprises an adhesive layer 1, a printing layer 2, a color-changing nano-fiber film layer 3 and a transparent protective layer 4, wherein the printing layer 2 is printed with inedible mark characters, and the color-changing nano-fiber film layer 3 can be changed into transparent color at normal temperature or high temperature to expose the printing layer 2.
Further, the transparent protection layer 4 is a release film layer.
A production process of the cold chain transportation safety label sticker comprises the following steps:
s1, printing a mark, coating viscose on the bottom surface of the printing layer substrate, and printing an inedible mark word on the upper surface of the printing layer substrate;
s2, preparing a spinning solution, adding 10-30 parts by weight of polymer into 90-100 parts by weight of solvent at room temperature, stirring by using a magnetic stirrer, completely dissolving the polymer, and uniformly mixing to obtain the spinning solution;
s3, preparing a color-changing nanofiber thin film layer, spinning the spinning solution obtained in the step S2 for 30-60min by using an electrostatic spinning machine under the conditions that the temperature is 20-50 ℃, the relative humidity is 20-90%, the spinning voltage is 2-40 kv, the spinning distance is 8-30 cm and the injection speed is 0.2-10.0 ml/h, so as to obtain the color-changing nanofiber thin film layer, and spraying the color-changing nanofiber thin film layer on the upper surface of the printing layer obtained in the step S1;
and S4, coating a transparent protective layer, and covering the transparent protective layer on the outer surface of the color-changing nanofiber film layer to obtain a finished label.
Further, the weight ratio of the polymer to the solvent is 10-20: 80-100 parts.
Further, the polymer is one or more self-healing polymer material combinations selected from polyurethane, polylactic acid, polystyrene, cellulose acetate, polyethylene oxide, polystyrene, polycaprolactone or polyvinylpyrrolidone.
Further, the self-healing polymer is composed of 40-80% of polyurethane and 20-60% of polycaprolactone by mass; the molecular weight of the polyurethane is 7000-10000, and the melting transition temperature Tm is 26-28 ℃; the molecular weight of the self-healing agent polycaprolactone is 30000-40000, and the melting temperature Tm is 30-32 ℃.
Further, the solvent is one or more selected from methanol, ethanol, trifluoroacetic acid, acetone, chloroform, ethanol, N-dimethylformamide or dimethylsulfoxide.
Further, the polymer is added and then is continuously stirred for 20-30 hours at the rotating speed of 10-1000 rpm.
Further, the diameter of the nanofiber obtained by spinning the polymer spinning solution is 100-1000 nm; the thickness of the color-changing nanofiber film layer is 0.05-5.0 mm.
Example 1, the weight ratio of polymer to solvent was 10: 90, respectively;
the self-healing high molecular polymer consists of 40% by mass of polyurethane and 60% by mass of polycaprolactone; the molecular weight of the polyurethane is 7000, and the melting transition temperature Tm thereof is 26 ℃; the molecular weight of the self-healing agent polycaprolactone is 30000, and the melting temperature Tm is 30 ℃;
the solvent is ethanol.
Example 2, the weight ratio of polymer to solvent was 20: 80;
the self-healing high molecular polymer consists of 80 mass percent of polyurethane and 20 mass percent of polycaprolactone; the molecular weight of the polyurethane is 7000, and the melting transition temperature Tm thereof is 26 ℃; the molecular weight of the self-healing agent polycaprolactone is 30000, and the melting temperature Tm is 30 ℃;
the solvent is acetone.
The embodiment can be divided into three types of cold chain transportation safety tags, namely freezing, refrigerating and high temperature according to the requirements of cold chain transportation temperature. The temperature at the time of cold chain is set to make it opaque and the time of exposure at normal or high temperature is set to make it opaque by adjusting the thickness of the nanofiber film.
The invention uses self-healing polyurethane and self-healing macromolecules as raw materials and sprays out a nano fiber film by an electrostatic spinning method by taking thermodynamic free energy as a principle. The back of the nanofiber membrane is pasted with an inedible label character, and due to the fact that the high molecular structure of the nanofiber membrane is stable at low temperature, the high molecular thin lines are crossed vertically and horizontally, when light rays enter the nanofiber membrane, the high molecular thin lines which are crossed vertically and horizontally can reflect the incident light rays, and the light rays are scattered and cannot penetrate through the nanofiber membrane, so that the nanofiber membrane is opaque. However, when the nanofiber film is exposed at normal temperature or high temperature, the criss-cross polymer fine wire structure collapses, and a self-healing process is started, so that the fine wires start to melt, mutually wind and fuse together. At this time, the incident light penetrates through the nanofiber film to make the nanofiber film look transparent, so that the character of the inedible label behind the nanofiber film can be obviously seen.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the description of the attached drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the machines, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or through an intermediary, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
Claims (9)
1. The utility model provides a cold chain transportation security label pastes which characterized in that, a cold chain transportation security label pastes and production technology thereof, follows supreme down and is in proper order: the color-changing nano-fiber film layer can be changed into a transparent color at normal temperature or high temperature to expose the printing layer.
2. The cold chain transportation security label of claim 1, wherein the transparent protective layer is a release film layer.
3. A production process of a cold chain transportation safety label sticker is characterized by comprising the following steps:
s1, printing a mark, coating viscose on the bottom surface of the printing layer substrate, and printing an inedible mark word on the upper surface of the printing layer substrate;
s2, preparing a spinning solution, adding 10-30 parts by weight of polymer into 90-100 parts by weight of solvent at room temperature, stirring by using a magnetic stirrer, completely dissolving the polymer, and uniformly mixing to obtain the spinning solution;
s3, preparing a color-changing nanofiber thin film layer, spinning the spinning solution obtained in the step S2 for 30-60min by using an electrostatic spinning machine under the conditions that the temperature is 20-50 ℃, the relative humidity is 20-90%, the spinning voltage is 2-40 kv, the spinning distance is 8-30 cm and the injection speed is 0.2-10.0 ml/h, so as to obtain the color-changing nanofiber thin film layer, and spraying the color-changing nanofiber thin film layer on the upper surface of the printing layer obtained in the step S1;
and S4, coating a transparent protective layer, and covering the transparent protective layer on the outer surface of the color-changing nanofiber film layer to obtain a finished label.
4. The process for producing a cold chain transportation security tag label according to claim 3, wherein the weight ratio of the polymer to the solvent is 10 to 20: 80-100 parts.
5. The process according to claim 3, wherein the polymer is one or more self-healing polymers selected from the group consisting of polyurethane, polylactic acid, polystyrene, cellulose acetate, polyethylene oxide, polystyrene, polycaprolactone, and polyvinylpyrrolidone.
6. The process for producing a cold chain transportation security tag label according to claim 5, wherein the self-healing polymer is composed of 40-80% by mass of polyurethane and 20-60% by mass of polycaprolactone; the molecular weight of the polyurethane is 7000-10000, and the melting transition temperature Tm is 26-28 ℃; the molecular weight of the self-healing agent polycaprolactone is 30000-40000, and the melting temperature Tm is 30-32 ℃. .
7. The process according to claim 3, wherein the solvent is one or more solvents selected from the group consisting of methanol, ethanol, trifluoroacetic acid, acetone, chloroform, ethanol, N-dimethylformamide and dimethylsulfoxide.
8. The production process of the cold chain transportation safety label sticker as claimed in claim 3, wherein after the polymer is added, stirring is continued for 20-30 hours at a rotation speed of 10-1000 rpm.
9. The production process of the cold chain transportation safety label sticker as claimed in claim 3, wherein the diameter of the nanofiber obtained by spinning the polymer spinning solution is 100-1000 nm; the thickness of the color-changing nanofiber film layer is 0.05-5.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011510390.9A CN112662331A (en) | 2020-12-18 | 2020-12-18 | Cold chain transportation safety label sticker and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011510390.9A CN112662331A (en) | 2020-12-18 | 2020-12-18 | Cold chain transportation safety label sticker and production process thereof |
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| Publication Number | Publication Date |
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| CN112662331A true CN112662331A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011510390.9A Pending CN112662331A (en) | 2020-12-18 | 2020-12-18 | Cold chain transportation safety label sticker and production process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114677905A (en) * | 2022-04-26 | 2022-06-28 | 北京诚捷诚科技有限公司 | Can cold label of laboratory test tube that pastes |
| CN115093817A (en) * | 2022-07-21 | 2022-09-23 | 湖南福泰数码材料科技有限公司 | Low-temperature glue, low-temperature label and preparation method of low-temperature label |
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Cited By (3)
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| CN115093817A (en) * | 2022-07-21 | 2022-09-23 | 湖南福泰数码材料科技有限公司 | Low-temperature glue, low-temperature label and preparation method of low-temperature label |
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Application publication date: 20210416 |
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