CN110628268A - Temperature-sensitive ink and preparation method thereof - Google Patents
Temperature-sensitive ink and preparation method thereof Download PDFInfo
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- CN110628268A CN110628268A CN201810662770.0A CN201810662770A CN110628268A CN 110628268 A CN110628268 A CN 110628268A CN 201810662770 A CN201810662770 A CN 201810662770A CN 110628268 A CN110628268 A CN 110628268A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
Abstract
The invention provides temperature-sensitive ink, which comprises: 2-3 parts of TPU base slurry; 1-3 parts by weight of a solvent; 1-3 parts by weight of modified temperature-sensitive color-changing powder; 0-2 parts of color paste with no color change; 0.1-0.3 parts by weight of an ultraviolet absorber; 0.05-0.1 part of antioxidant. The invention realizes the interconversion of the color water of the printing pattern from one color to another color through the color changing effect generated by the interaction and mutual superposition of a temperature-sensitive color changing powder and a non-color changing component in the printing ink. Meanwhile, the temperature-sensitive color-changing powder has better compatibility in the coating through surface modification, so that the ink has excellent adhesive force, weather resistance and other properties. The temperature sensing color changing powder is subjected to surface modification, so that the compatibility of the temperature sensing color changing powder in a matrix coating is improved. The ink improves the degree of freedom of reversible color change combination.
Description
Technical Field
The invention relates to the technical field of printing, in particular to temperature-sensitive ink and a preparation method thereof.
Background
At present, conventional non-color-changeable ink is adopted to print in the leather industries such as PVC, TPU, PU synthetic leather, microfiber, double-layer leather and the like, and trademarks, brands and pictures and texts of the industries such as toys, daily necessities, packages, electronic products and the like, and the conventional ink does not change color, has no specificity and thus does not have the functions of anti-counterfeiting and warning.
The early thermochromic ink mostly uses inorganic thermochromic materials, and the principle of the inorganic thermochromic material is that reversible color changes are generated by pigment crystal form transformation and ligand geometric configuration changes, such as: CoCl 2-2C 6H12N 4-10H 2O loses water at about 39.6 ℃ to produce reversible crystal change between pink and pacific blue, and the thermochromic mechanism utilizes the inherent properties of the substance; however, the color and temperature of the desired change cannot be selected independently, and the color change is usually more dispersive, has less color difference and great toxicity, and thus has larger limitation.
In recent years, thermochromic materials have been developed, and temperature-sensitive inks have frequently used reversible thermochromic organic compounds as thermochromic pigments, which are mainly based on an electronic fading mechanism, and when passing through a certain temperature point, the thermochromic pigments undergo solidification and color development and melt fading to generate reciprocal transformation, but only the same color water undergoes dark and light reversible fading change between dark and light colors (or transparent colors), but the original color water is not transformed into another color water after being heated, and the original color can be restored after being cooled.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a temperature-sensitive ink, which can generate a temperature-sensitive ink that can reversibly change from one original color to another color and change color repeatedly by human touch, friction, scratch or temperature sensing.
The invention provides a temperature-sensitive ink, which comprises:
preferably, the method comprises the following steps:
preferably, the TPU-based syrup is prepared by the process of:
mixing and dissolving butanone, dimethylformamide and TPU to obtain TPU base slurry.
Preferably, the mass concentration of the TPU base pulp is 10-35%.
Preferably, the solvent is butanone; the ultraviolet absorbent is UV-9; the antioxidant is antioxidant 1010.
Preferably, the modified thermochromic powder is specifically:
dissolving gamma-methacryloxypropyltrimethoxysilane in acetone, spraying the acetone on the temperature-sensitive color-changing powder, uniformly mixing, and drying at 35-40 ℃ to obtain the modified temperature-sensitive color-changing powder.
Preferably, the temperature-sensitive color-changing powder is black temperature-sensitive color-changing powder, red temperature-sensitive color-changing powder or blue temperature-sensitive color-changing powder; the particle size of the temperature-sensitive color-changing powder is 1-10 mu m; the temperature sensing color changing temperature of the temperature sensing color changing powder is 33 ℃.
Preferably, the color-invariant paste is fluorescent red ink or bisazo organic yellow paste.
The invention provides a preparation method of temperature-sensitive ink, which comprises the following steps:
A) mixing and stirring the solvent, the modified temperature-sensitive color-changing powder, and then mixing and stirring the mixture with the ultraviolet absorbent and the antioxidant to obtain color-changing color paste;
B) and mixing the non-discoloring color paste and the discoloring color paste, mixing and stirring the mixture with the TPU base paste, filtering, and standing to obtain the temperature-variable ink.
Preferably, the stirring time in the step B) is 10-15 min; the standing time is 10-12 h.
Compared with the prior art, the invention provides temperature-sensitive ink which comprises the following components: 2-3 parts of TPU base slurry; 1-3 parts by weight of a solvent; 1-3 parts by weight of modified temperature-sensitive color-changing powder; 0-2 parts of color paste with no color change; 0.1-0.3 parts by weight of an ultraviolet absorber; 0.05-0.1 part of antioxidant. The invention realizes the interconversion of the color water of the printing pattern from one color to another color, rather than the reciprocal of only from color to colorless, by the color change effect generated by the interaction and mutual superposition of the temperature-sensitive color-changing powder and the non-color-changing component in the ink. Meanwhile, the temperature-sensitive color-changing powder has better compatibility in the coating through surface modification, so that the ink has excellent adhesive force, weather resistance and other properties. The temperature-sensitive color-changing powder is subjected to surface modification to improve the compatibility of the temperature-sensitive color-changing powder in a matrix coating, and printed pictures and texts can change color (or fade) or recover to original color after reaching a certain temperature point through temperature sensing, friction or contact, so that the effect is more obvious and rapid compared with other common temperature-sensitive color-changing powder. The ink improves the degree of freedom of reversible color change combination.
Detailed Description
The invention provides a temperature-sensitive ink, which comprises:
the temperature change printing ink aims at different printing substrates, including PVC, PU and leather (genuine leather, double-layer leather, microfiber, artificial leather and the like), and relates to the printing technical field related to industries such as leather, toys, daily necessities, packaging, electronic products and the like; in particular to a temperature-variable ink which can generate reversible color change repeatedly through human body touch, friction, ruling or temperature sensing and has special effect, which provides a special color change effect for printing brand trademarks and graphic labels, thereby having obvious functions of chemical anti-counterfeiting, warning, label decoration and the like.
The temperature change ink provided by the invention comprises 2-3 parts by weight of TPU (thermoplastic polyurethane) base slurry; preferably comprising 3 parts by weight of a TPU-based syrup.
According to the invention, the TPU-based syrup is preferably prepared by the following process:
mixing and dissolving butanone, dimethylformamide and TPU to obtain TPU base slurry.
Most preferred are in particular:
firstly, taking (Bayer) lactone TPU particles as a raw material, and weighing 25 parts of TPU, 55 parts of MEK and 20 parts of DMF respectively according to weight; MEK and DMF are mixed and stirred into a mixed solvent, TPU particles are added into the mixed solvent while being slowly stirred, and then the mixed solvent is stirred at a high speed for about 30 minutes until TPU is completely dissolved, so that TPU base slurry with the solid content of 25% is prepared.
The present invention is not limited to the specific manner of mixing and stirring, as will be appreciated by those skilled in the art.
The concentration of the TPU-based syrup of the present invention is not limited to the above-mentioned 25%, which is only the most preferred value. In fact, the concentration range of 10% -35% is all acceptable; more preferably 20% to 30%. The mass fractions of the rest butanone and the dimethylformamide can be properly adjusted according to the above proportion, which is not limited by the invention.
In the present invention, the source of the raw material is not limited and may be commercially available.
The TPUs mentioned in the present invention are thermoplastic polyurethane elastomer rubbers which are well known to the person skilled in the art. The invention is not so limited.
The temperature change ink provided by the invention comprises 1-3 parts by weight of solvent; preferably, the solvent is 2-3 parts by weight; more preferably 3 parts by weight of solvent.
In the present invention, the solvent is butanone; the present invention is not limited in terms of its source and purity, and may be any commercially available purity known to those skilled in the art.
The temperature change ink provided by the invention comprises 1-3 parts by weight of modified temperature change toner; preferably, the toner composition comprises 1-2 parts by weight of a modified temperature-sensitive toner.
The temperature-sensitive color-changing powder is preferably black temperature-sensitive color-changing powder, red temperature-sensitive color-changing powder or blue temperature-sensitive color-changing powder; more preferably black thermochromic powder or red thermochromic powder; most preferred is a black thermochromic powder.
The present invention is not limited in its source, and may be commercially available. The material is preferably 33 ℃ organic temperature-sensitive color-changing powder which can be Guangzhou crystal color pigment, and the material is microcapsule powder with the particle size of 1-10 mu m,
the particle size of the temperature-sensitive color-changing powder is preferably 1-10 mu m; the temperature sensing color change temperature of the temperature sensing color change powder is preferably 33 ℃.
According to the invention, the modified thermochromic powder is preferably as follows:
dissolving gamma-methacryloxypropyltrimethoxysilane in acetone, spraying the acetone on the temperature-sensitive color-changing powder, uniformly mixing, and drying at 35-40 ℃ to obtain the modified temperature-sensitive color-changing powder.
More preferably, it may be:
0.2 g of gamma-methacryloxypropyltrimethoxysilane is dissolved in 5ml of acetone, uniformly sprayed on 100 g of temperature-sensitive color-changing powder and uniformly mixed, and dried at 40 ℃ to obtain the modified temperature-sensitive color-changing powder.
The present invention is not limited to the particular manner of spraying and mixing, as is well known to those skilled in the art.
The invention selects gamma-methacryloxypropyltrimethoxysilane for surface treatment, effectively improves the compatibility of the traditional temperature-sensitive color-changing powder and matrix resin, and thus obviously improves the color-changing speed and effect, the adhesive force, the weather resistance and other properties of the ink.
The temperature change ink provided by the invention comprises 0-2 parts by weight of non-color-change color paste; preferably comprises 0.1-1 weight part of color-invariant paste. According to the invention, the color-invariant paste comprises all inorganic and organic color-invariant pigments; preferably fluorescent red ink or bisazo organic yellow paste; more preferably fluorescent red ink.
The present invention is not limited in its source, and may be commercially available.
The temperature change ink provided by the invention comprises 0.1-0.3 part by weight of ultraviolet absorbent; preferably 0.1 to 0.2 parts by weight of an ultraviolet absorber; more preferably, 0.1 parts by weight of an ultraviolet absorber is included.
According to the invention, the UV absorber is preferably UV-9. The present invention is not limited in its source, and may be commercially available.
The temperature change ink provided by the invention comprises 0.05-0.1 part by weight of antioxidant; preferably, 0.05 parts by weight of an antioxidant is included.
The antioxidant of the present invention is preferably antioxidant 1010. The present invention is not limited in its source, and may be commercially available.
In a preferred embodiment of the present invention, the temperature-sensitive ink comprises:
in a preferred embodiment of the present invention, the temperature-sensitive ink comprises:
the invention provides a temperature-sensitive ink, which comprises: 2-3 parts of TPU base slurry; 1-3 parts by weight of a solvent; 1-3 parts by weight of modified temperature-sensitive color-changing powder; 0-2 parts of color paste with no color change; 0.1-0.3 parts by weight of an ultraviolet absorber; 0.05-0.1 part of antioxidant. The invention realizes the interconversion of the color water of the printing pattern from one color to another color, rather than the reciprocal of only from color to colorless, through the color change effect generated by the interaction and mutual superposition of the temperature-sensitive color-changing powder and the non-color-changing component in the ink. Meanwhile, the temperature-sensitive color-changing powder has better compatibility in the coating through surface modification, so that the ink has excellent adhesive force, weather resistance and other properties. The temperature-sensitive color-changing powder is subjected to surface modification to improve the compatibility of the temperature-sensitive color-changing powder in a matrix coating, and printed pictures and texts can change color (or fade) or recover to original color after reaching a certain temperature point through temperature sensing, friction or contact, so that the effect is more obvious and rapid compared with other common temperature-sensitive color-changing powder. The ink improves the degree of freedom of reversible color change combination.
The invention provides a preparation method of temperature-sensitive ink, which comprises the following steps:
A) mixing and stirring the solvent, the modified temperature-sensitive color-changing powder, and then mixing and stirring the mixture with the ultraviolet absorbent and the antioxidant to obtain color-changing color paste;
B) and mixing the non-discoloring color paste and the discoloring color paste, mixing and stirring the mixture with the TPU base paste, filtering, and standing to obtain the temperature-variable ink.
The preparation method of the temperature-sensitive color-changing ink provided by the invention comprises the steps of stirring the solvent and the modified temperature-sensitive color-changing powder, and then mixing and stirring the mixture with the ultraviolet absorbent and the antioxidant to obtain the color-changing color paste.
Firstly, slowly adding the modified temperature-sensitive color-changing powder into a solvent while stirring, stirring for 10-15 min, adding the ultraviolet absorbent and the antioxidant, mixing and stirring for 10-15 min to obtain the color-changing color paste.
The above components and proportions of the present invention have been clearly described, and are not described herein again.
The present invention is not limited to the specific manner of stirring, and those skilled in the art will be familiar with the present invention.
And mixing and stirring the non-discoloring color paste and the discoloring color paste for 10-15 min, and then mixing and stirring the mixture and the TPU base paste for 10-15 min.
And filtering the mixed slurry, and standing for 10-12 h to obtain the temperature-change ink.
The oil TPU base pulp is used as a carrier, so that the printing ink has excellent adhesive force and quick drying property.
The printing substrate of the present invention should preferably be selected to have a white background or a light background.
The pH value of the ink and the base material is controlled to be most suitable between 5 and 7, and the plastic base material to be printed is best in selection of high fluidity; i.e. an MI value of at least more than 10, the higher the MI value the better the discoloration.
The invention can improve the scratch resistance of the surface of the printed product, and can obtain satisfactory effect by using the water-based treating agent for a 150-120-mesh silk-mesh wheel to perform surface treatment once after the pattern is printed.
The invention realizes the interconversion of the color water of the printed pattern from one color to another color, rather than the only reciprocal of the color from colored to colorless, by the color change effect generated by the interaction and mutual superposition of a color change component and a non-color change component in the ink. For example: the green ink can be obtained by adding a blue temperature-sensitive color-changing ink into yellow (non-color-changing) ink, the surface layer of the printing ink is the green ink under the normal low-temperature state, and the residual yellow is exposed out of the printed pattern color water due to the fact that the blue color-changing component becomes colorless after the printing ink is heated to 33 ℃, so that the interconversion from green to yellow is realized.
The color-changing component and the color-unchanging component in the ink follow the color matching principle of three primary colors, and the combination of various colors with reciprocal changes can be generated by reasonably matching the colors of the two components. Thereby achieving the purpose of improving the combination freedom of the reciprocal colors.
Such as: by matching color-changing red (186C) with disazo organic yellow (Y-83), orange-yellow interconversion can be achieved.
The color changing sky blue (313C) is matched with the disazo organic yellow (Y-83), so that the interconversion between grass green and yellow can be generated. Firstly, the color phases of the color-changing component and the non-color-changing component are matched to generate obvious and strong color-changing effect.
The color-changing component in the ink must be a color water which has a darker color and a strong covering power in a low temperature state relative to the non-color-changing component. Such as: the color-changing component with relatively dark color, namely the color-changing peach red is matched with the color-changing component with relatively light color, namely the sky blue, so as to obtain the reciprocal of the purple red and the Lonicera gracilis.
After a reasonable hue collocation is selected, the difference of the proportion of the color-changing component to the non-color-changing component affects the difference of the covering power and the coloring power of the color-changing component in a mixed (color) material, and determines the change of the color light finally reflected by the mixed (pigment) color.
Such as: when the color-changing black is matched with the fluorescent red (without color change), the coloring power is compared, and when the coloring power of the color-changing black is larger than that of the fluorescent red, the color is changed from black to yellow; when the color-changing black coloring power is smaller than the fluorescent red coloring power, brown Lou fluorescent red interconverts.
For another example: the combination of the color changing violet (2728C) and pink (non-color changing) means purple, Lou and pale rose interconversion when the coloring power of the color changing violet (2728C) is greater than pink (non-color changing); purple peach, Lou and Shao pale rose interconversion when the tinting strength of violet (2728C) is less than pink (non-discoloring) tinting strength.
In order to further illustrate the present invention, the temperature change ink provided by the present invention is described in detail below with reference to examples.
Example 1
Firstly, taking (Bayer) lactone TPU particles as a raw material, and weighing 25 parts of TPU, 55 parts of MEK and 20 parts of DMF respectively according to weight; MEK and DMF are mixed and stirred into a mixed solvent, TPU particles are added into the mixed solvent while being slowly stirred, and then the mixed solvent is stirred at a high speed for about 30 minutes until TPU is completely dissolved, so that TPU base slurry with the solid content of 25% is prepared.
Weighing the materials in parts by weight, slowly adding 2 parts of modified Black temperature-sensitive color-changing powder (Black5C2X) into 3 parts of butanone while stirring, stirring for 10 minutes until the materials are uniformly dispersed, adding an ultraviolet absorbent UV-90.1 parts and an antioxidant 10100.05 parts into the slurry, stirring for 10 minutes, continuously adding 3 parts of TPU base slurry into the mixed color paste, stirring for 10 minutes until the materials are uniform, and finally standing the filtered mixed slurry for 12 hours to prepare the modified temperature-sensitive achromatic ink capable of changing from Black to transparent.
Example 2
Firstly, taking (Bayer) lactone TPU particles as a raw material, and weighing 25 parts of TPU, 55 parts of MEK and 20 parts of DMF respectively according to weight; MEK and DMF are mixed and stirred into a mixed solvent, TPU particles are added into the mixed solvent while being slowly stirred, and then the mixed solvent is stirred at a high speed for about 30 minutes until TPU is completely dissolved, so that TPU base slurry with the solid content of 25% is prepared.
Weighing the materials in parts by weight, slowly adding 1 part of Black modified temperature-sensitive color-changing powder (Black5C2X) into 3 parts of butanone while stirring, stirring for 10 minutes until the materials are uniform, adding UV-90.1 parts of ultraviolet absorbent and 10100.05 parts of antioxidant into the slurry, stirring for 10 minutes, adding 1 part of fluorescent red (non-color-changing) ink into the slurry, stirring for 10 minutes until the materials are uniform, adding 3 parts of TPU base slurry into the mixed color slurry, and stirring for 10 minutes until the materials are uniform; and finally, filtering the slurry, standing for 12 hours to prepare the modified thermochromic ink capable of changing brown into fluorescent red, wherein the ink is printed to show fluorescent red at the temperature higher than 33 ℃ and brown at the temperature lower than 33 ℃, and the printing color can be reversibly circulated between brown and fluorescent red along with the temperature change.
Example 3
Firstly, taking (Bayer) lactone TPU particles as a raw material, and weighing 25 parts of TPU, 55 parts of MEK and 20 parts of DMF respectively according to weight; MEK and DMF are mixed and stirred into a mixed solvent, TPU particles are added into the mixed solvent while being slowly stirred, and then the mixed solvent is stirred at a high speed for about 30 minutes until TPU is completely dissolved, so that TPU base slurry with the solid content of 25% is prepared.
After weighing the materials in parts by weight, slowly adding 1.5 parts of Black modified temperature-sensitive color-changing powder (Black5C2X) into 3 parts of butanone while stirring, and stirring for 10 minutes until the mixture is uniform; adding ultraviolet absorbent UV-90.1 parts and antioxidant 10100.05 parts, stirring for 10 minutes, adding 0.5 part of fluorescent red (non-color-changing) ink into the slurry, and stirring for 10 minutes until the mixture is uniform; adding 3 parts of TPU base paste into the mixed color paste, continuously stirring for 10 minutes until the mixture is uniform, finally filtering the paste, standing for 12 hours, and then preparing the modified thermochromic ink changing from black to fluorescent red, wherein the ink shows fluorescent red at a temperature higher than 33 ℃ after being printed, and shows black at a temperature lower than 33 ℃, and the printing color can change along with the temperature and can reversibly circulate between the fluorescent red and the black.
Example 4
The inks prepared in examples 1 to 3 were measured for their performance, and the results were as follows:
1) through dry and wet wiping detection and comparison, the adhesion of the ink is improved by 50 percent compared with that of the common acrylic ink; 2) through an ultraviolet lamp aging test, the weather resistance of the ink is improved by more than 2 times compared with the common ink without the ultraviolet absorbent UV-9 and the antioxidant 1010; 3) through stirring observation, the speed of dispersing and mixing the modified temperature-sensitive color-changing powder in the TPU base paste is higher than that of the commercially available common temperature-sensitive powder in the acrylic base paste, the adhesion of the printed color after drying is stronger, and the color-changing effect is better, which shows that the modified temperature-sensitive powder has better dispersibility in the ink system and stronger compatibility with each component, thereby playing a certain role in improving the performance of each aspect of the ink.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A temperature-sensitive ink, comprising:
2. the temperature-sensitive ink of claim 1, comprising:
3. the temperature-sensitive ink according to any one of claims 1 to 2, wherein the TPU based slurry is prepared by a method comprising:
mixing and dissolving butanone, dimethylformamide and TPU to obtain TPU base slurry.
4. The temperature-sensitive ink according to claim 3, wherein the TPU based paste has a mass concentration of 10 to 35%.
5. The temperature-sensitive ink according to any one of claims 1 to 2, wherein the solvent is methyl ethyl ketone; the ultraviolet absorbent is UV-9; the antioxidant is antioxidant 1010.
6. The temperature-sensitive ink according to any one of claims 1 to 2, wherein the modified temperature-sensitive toner is specifically:
dissolving gamma-methacryloxypropyltrimethoxysilane in acetone, spraying the acetone on the temperature-sensitive color-changing powder, uniformly mixing, and drying at 35-40 ℃ to obtain the modified temperature-sensitive color-changing powder.
7. The temperature-sensitive color-changing ink according to claim 6, wherein the temperature-sensitive color-changing powder is a black temperature-sensitive color-changing powder, a red temperature-sensitive color-changing powder, or a blue temperature-sensitive color-changing powder; the particle size of the temperature-sensitive color-changing powder is 1-10 mu m; the temperature sensing color changing temperature of the temperature sensing color changing powder is 33 ℃.
8. The temperature-sensitive ink as claimed in any one of claims 1 to 2, wherein the non-color-changing paste is a fluorescent red ink or a bisazo organic yellow paste.
9. A preparation method of temperature-sensitive ink is characterized by comprising the following steps:
A) mixing and stirring the solvent, the modified temperature-sensitive color-changing powder, and then mixing and stirring the mixture with the ultraviolet absorbent and the antioxidant to obtain color-changing color paste;
B) and mixing the non-discoloring color paste and the discoloring color paste, mixing and stirring the mixture with the TPU base paste, filtering, and standing to obtain the temperature-variable ink.
10. The preparation method according to claim 9, wherein the stirring time in the step B) is 10-15 min; the standing time is 10-12 h.
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| CN115428745A (en) * | 2021-06-02 | 2022-12-06 | 天津大学四川创新研究院 | Livestock thermochromic ear tag, preparation method and machine vision monitoring system thereof |
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| CN115428745A (en) * | 2021-06-02 | 2022-12-06 | 天津大学四川创新研究院 | Livestock thermochromic ear tag, preparation method and machine vision monitoring system thereof |
| CN113981711A (en) * | 2021-11-30 | 2022-01-28 | 高梵(浙江)信息技术有限公司 | Down jacket fabric with ultraviolet color-changing coating and processing method thereof |
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Application publication date: 20191231 |