CN111714380A

CN111714380A - Heating mask

Info

Publication number: CN111714380A
Application number: CN202010699564.4A
Authority: CN
Inventors: 廖宇; 钱俊; 叶双莉; 宋蓉; 赵美君; 王鑫; 陈云阳; 李佳; 孙基素; 马晓花; 李庆芝; 魏旭冉; 黄月; 程凯兴; 刘汉东; 陈袁
Original assignee: Wuhan Shidimu Cultural Media Co ltd
Current assignee: Wuhan Shidimu Cultural Media Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2020-09-29
Anticipated expiration: 2040-07-17
Also published as: CN111714380B

Abstract

The invention relates to the technical field of facial masks, in particular to a heating facial mask which at least comprises a substrate layer, wherein a microcapsule facial mask layer, a blocking layer, a low-voltage heating ink layer and a covering layer are sequentially arranged on the substrate layer, the microcapsule facial mask layer is microcapsules wrapping facial mask liquid, and the low-voltage heating ink layer is connected with a power supply. According to the scheme, the facial mask liquid is wrapped by microcapsules, and is gradually released when the temperature reaches a certain condition, so that the facial mask liquid is slowly released, and the loss and waste of the facial mask liquid are avoided. The heating can also ensure that the temperature of the mask is proper, promote blood circulation and facilitate the absorption of nutrient components of the mask liquid.

Description

Heating mask

Technical Field

The invention relates to the technical field of facial masks, in particular to a heating facial mask.

Background

The existing facial mask is usually a cold compress facial mask, and facial mask liquid is directly poured on the facial mask, so that the loss of the facial mask liquid can not be prevented, and the temperature of the facial mask can not be adjusted.

In order to prevent the facial mask liquid from losing, the technical scheme adopts the widely used microcapsule technology to store the facial mask liquid. The microcapsule technology is a technology for forming a core-shell structure by wrapping solid, liquid and gas in a polymer film. The microcapsules can encapsulate and protect the core material. Under the appropriate temperature conditions, the microcapsules are destroyed, thereby releasing the core material.

The heat expansion microcapsule is a kind of polymer particle prepared by microcapsule technology, the particle size is 5-100 μm, the outer shell is composed of airtight thermoplastic high polymer, and the inner part of the outer shell is wrapped by low boiling point organic solvent. The boiling point of the organic solvent is less than the glass transition temperature of the polymer shell, the polymer shell is softened after being heated to a certain temperature, the low-boiling-point organic solvent serves as a foaming agent, and the internal vapor pressure generated by gasification enables the microcapsules to expand and become larger. After the thermal expansion microcapsules are foamed, the size of the thermal expansion microcapsules is stable within a certain temperature range, and the microcapsules gradually shrink due to the escape of the internal foaming agent when the thermal expansion microcapsules are continuously heated.

Common wall materials for microcapsules are: sodium alginate, molecular formula (C6H7O6Na) n, is white or light yellow amorphous powder, tasteless, easily soluble in water, insoluble in organic solvent such as alcohol, is a natural polysaccharide, has biological adhesion biocompatibility and is biodegradable. The sodium alginate has the stability, solubility, adhesiveness and safety required by the auxiliary materials of the pharmaceutical preparation, and is suitable for preparing the pharmaceutical preparation. Chitosan, also called chitosan, is white or yellowish solid in tablet package, is the only alkaline polysaccharide in natural polysaccharide, is easily soluble in hydrochloric acid and most of organic acids, and is insoluble in water and alkali solution, and chitosan has good bioadhesion, biocompatibility, biodegradability and better film-forming property. ③ the gelatin is a protein mixture which is insoluble in cold water but soluble in hot water, is colorless or light yellow transparent flake or granule, can absorb 5-10 times of water by mass per se and swell, and is insoluble in ethanol, chloroform, ethyl ether and the like. Can generate cross-linking reaction with aldehydes such as formaldehyde and the like to form a slow release layer, and the gelatin has biocompatibility, biodegradability and gel formability and is suitable for being used as a microcapsule wall material. The porous starch is a novel modified starch, the natural starch is treated by enzyme, pores are formed on the surface of the natural starch and extend into the granules, the porous starch is a hollow granule similar to a horse honeycomb, various substances can be contained in the hollow granule, the porous starch has good adsorbability, and students use the porous starch as a microcapsule wall material in recent years and obtain good effect.

After the microcapsule is adopted to store the facial mask liquid, the facial mask needs to be heated to gradually release the facial mask liquid in the microcapsule, so a technical scheme capable of heating is needed.

Disclosure of Invention

In order to solve the problems, the invention provides a heating facial mask which adopts low-voltage heating ink to heat and promote microcapsules to release essence. The mask essence is coated by the thermal expansion microcapsules, the density of the foaming agent in the microcapsules is reduced along with the rise of the temperature, the internal volume is increased, and the pores of the shell membrane on the outer layer of the microcapsules are enlarged, so that the mask essence in the microcapsules is gradually released. The heating can also make the temperature of the facial mask proper, promote blood circulation and facilitate the absorption of nutrient components in the facial mask.

The technical scheme adopted by the invention is as follows: the utility model provides a heating facial mask, includes the stratum basale at least, set gradually microcapsule surface film layer, isolation layer, low-voltage heating printing ink layer and overburden on the stratum basale, microcapsule surface film layer is the microcapsule of parcel facial mask liquid, low-voltage heating printing ink layer with be located and be connected with the power.

The power supply is a USB interface or a switch and a battery which can be connected with electricity, the USB interface or the switch is positioned at the edge of the heating mask, and the low-voltage heating ink layer is connected with the power supply through conductive ink or conductive metal.

The microcapsule is prepared by one or more of sodium alginate, chitosan, gelatin and porous starch in any proportion.

The isolation layer is made of paper or cloth.

The base layer and the cover layer are non-woven fabrics.

The low-voltage heating ink layer comprises the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water.

The low-voltage heating ink layer is formed by coating low-voltage heating ink on the substrate layer through a screen printing or coating method.

The pH regulator is one or more of formamide, ethanolamine or ammonia water which are mixed in any proportion.

The dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a plurality of the dispersant mixed in any proportion.

The defoaming agent is one or a plurality of types of DefomW-0506 type waterborne defoaming agents, TEGO Foamex 805 type waterborne defoaming agents or SF-809B type standard American silicon fluorine defoaming agents which are mixed in any proportion.

The technical scheme of the invention has the beneficial effects that:

(1) the facial mask liquid is wrapped by microcapsules, and is gradually released when the temperature reaches a certain condition, so that the facial mask liquid is slowly released, and the loss and waste of the facial mask liquid are avoided. The heating can also ensure that the temperature of the mask is proper, promote blood circulation and facilitate the absorption of nutrient components of the mask liquid.

(2) The power supply has two options, namely a USB interface capable of being connected with electricity, and a switch and a battery. When the power supply adopts the combination of a switch and a battery, the switch is closed to provide power supply for the heating surface film; when the USB interface is adopted, the charging power supply or the mobile power supply can be directly connected with the USB interface arranged outside the heating mask, so that the heating mask is convenient to use and is not limited by places.

(3) The isolation layer between the microcapsule surface film layer and the low-voltage heating ink layer is made of white paper or non-woven fabric or plastic film, the microcapsule surface film layer and the low-voltage heating ink layer are separated, and the black covering the low-voltage heating ink layer is more attractive.

(4) The low-voltage heating ink provided by the invention has the following advantages: 1. biomass materials such as xanthan gum and rosin resin are used as raw materials, so that the effects of energy conservation and environmental protection are achieved; 2. under the combined action of the xanthan gum and the rosin resin, the overall proportion of the acrylic resin in the ink is reduced, so that the proportion of conductive fillers such as carbon black, graphite and carbon nano tubes in a carbon film formed after the prepared low-voltage heating ink is dried is increased, and the conductivity is excellent; 3. the low-voltage heating ink has higher viscosity and better thixotropy, the viscosity of the ink is instantly reduced under the action of shearing force in the printing process to form a thicker carbon film, the viscosity is rapidly improved after the printing is finished, so that the ink is not diffused on a printing stock, the printing adaptability of the ink is improved, and the low-voltage heating ink is suitable for screen printing; 4. the low-voltage heating ink can obtain a better heating effect under a lower working voltage. High heating efficiency and high heating rate.

Drawings

FIG. 1 is a schematic view of one embodiment of a heating mask;

FIG. 2 is a schematic view of a heating mask hierarchy;

FIG. 3(a) is a graph showing the operation of 3cm by 3cm low voltage heating ink packs prepared in example 1 of the present invention at different voltages;

FIG. 3(b) is the operation of the low-voltage heating ink block in example 1 under the condition of continuously changing voltage;

FIG. 4 is a graph showing the temperature of the low-voltage heat-generating ink stick versus time in example 1;

FIG. 5 is a graph showing the heating temperature of the low-voltage heating ink block as a function of power density in this example 1;

FIG. 6 is a graph showing the volt-ampere relationship of the low voltage thermal ink stick of this example 1;

FIG. 7 is a graph showing the relationship between the input voltage and the saturation temperature of the low-voltage heating ink block in this embodiment 1.

Description of reference numerals: 1. the device comprises a base layer, 2, a microcapsule surface film layer, 3, an isolation layer, 4, a low-voltage heating ink layer, 5, a covering layer, 6, leads A and 7, leads B and 8 and a USB interface.

Detailed Description

The present invention/invention will be described in detail with reference to the accompanying drawings and examples, and the present invention/invention is not limited to the examples.

An embodiment of the heating facial mask is shown in fig. 1 and fig. 2, and at least comprises a substrate layer 1, wherein a microcapsule facial mask layer 2, an isolation layer 3, a low-voltage heating ink layer 4 and a covering layer 5 are sequentially arranged on the substrate layer, the microcapsule facial mask layer is a microcapsule wrapping facial mask liquid, a lead A is arranged between the covering layer and the low-voltage heating ink layer, a lead B is arranged between the low-voltage heating ink layer and the isolation layer, the lead A6 and the lead B7 are connected with a USB interface 8 positioned outside the heating facial mask, and the connected lead A, the lead B, the low-voltage heating ink layer and the USB interface form a loop. In fact, the specific setting positions of the wire A and the wire B are correspondingly set according to the size of the low-voltage heating ink layer, the low-voltage heating ink layer can be vertically arranged, and the low-voltage heating ink layer can also be arranged at two ends of the low-voltage heating ink layer. The facial mask is provided with openings which are in accordance with human engineering in the eye, ear, nose and mouth areas. The low voltage heating ink layer acts like a heating resistor.

The power supply can adopt a combination of a switch and a battery besides adopting a USB interface capable of being connected with electricity. When the power supply is the combination of a switch and a battery, the switch is closed to provide power for the heating surface film, and the switch needs to be arranged at the edge of the basal layer for convenient use; when the USB interface is adopted, the charging power supply or the mobile power supply can be directly connected with the USB interface arranged on the edge of the basal layer.

The low-voltage heating ink layer is connected with the power supply through conductive ink or conductive metal, and the conductive ink can adopt the low-voltage heating ink provided by the scheme and can also be conductive ink of other types. The circuit is simple and easy to realize, and the circuit is formed by connecting a switch, a battery, a lead and a low-voltage heating ink layer into a loop, or two poles of a USB interface are connected with the low-voltage heating ink layer through the lead.

The microcapsule is made of one or more of sodium alginate, chitosan, gelatin and porous starch in any proportion, the isolation layer is made of white paper or non-woven fabric or plastic film, and the substrate layer and the covering layer are non-woven fabric.

When the heating facial mask is connected with a power supply circuit, the microcapsule wall expands and breaks, and the facial mask liquid is released to normally use the facial mask, and if the temperature is high, the facial mask can be used by cooling the spot, and if the temperature is low, the facial mask can be heated by electricity again.

The technical scheme of the invention has the beneficial effects that:

The low-voltage heating ink in the heating mask consists of the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water. The pH regulator is one or more of formamide, ethanolamine or ammonia water which are mixed in any proportion. The dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a plurality of the dispersant mixed in any proportion. The defoaming agent is one or a plurality of types of DefomW-0506 type waterborne defoaming agents, TEGO Foamex 805 type waterborne defoaming agents or SF-809B type standard American silicon fluorine defoaming agents which are mixed in any proportion.

The preparation method of the low-voltage heating ink specifically comprises the following steps:

(1) weighing each component of the low-voltage heating ink according to the mass parts, placing the water-based acrylic resin, the rosin resin, the pH regulator and the deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding the carbon black, the graphite, the carbon nanotube dispersion liquid and the xanthan gum, uniformly stirring, finally adding the dispersing agent and the defoaming agent, and uniformly stirring to form the primary heating ink;

(2) mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer, stirring the mixture for 1-3 hours, taking out the mixture, filtering the mixture, and finally placing the primary heating ink in a sand mill, and grinding the mixture until the particle size is below 5 microns to obtain the low-voltage heating ink.

In the preparation process of the low-voltage heating ink, xanthan gum, conductive fillers such as carbon black, graphite and carbon nano tubes and deionized water can form a stable three-dimensional network structure, so that graphene, carbon black and graphite generated in the mechanical grinding process have better dispersion stability; the xanthan gum serving as the biomass hydrogel can form a reversible hydrogel with solvents such as deionized water and the like, free water molecules in the ink are reduced, the viscosity of the ink is improved, the reversible hydrogel enables the viscosity of the prepared low-voltage heating ink to be larger than 10000mPa & s in a standing state, the viscosity of the low-voltage heating ink is reduced to 4000-5000 mPa & s under stirring at a rotating speed of 60r/min, and the viscosity of the low-voltage heating ink is recovered to be more than 10000mPa & s after stirring is stopped.

Example 1:

weighing 7% of water-based acrylic resin, 7% of rosin resin, 6% of graphite, 10% of carbon black, 35% of carbon nanotube dispersion liquid, 0.5% of formamide, 0.5% of ethanolamine, 5% of Disponer W-518 type water-based wetting dispersant, 0.3% of xanthan gum, 0.5% of TEGO Foamex 805 type water-based defoaming agent and 28.2% of deionized water according to parts by mass.

Placing 7% of water-based acrylic resin, 7% of rosin resin, 0.5% of formamide, 0.5% of ethanolamine and 28.2% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black, 6% of graphite, 35% of carbon nanotube dispersion liquid and 0.3% of xanthan gum, uniformly stirring, finally adding 5% of Disponer W-518 type water-based wetting dispersant and 0.5% of TEGO Foamex 805 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the embodiment has the viscosity of 9000-11000 mPa & s under stirring at the rotating speed of 12r/min, the viscosity of 4000-5000 mPa & s under stirring at the rotating speed of 60r/min, the thickness of the dried ink layer is 15-18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.6 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 3V can reach 80 ℃.

The measurement conditions were as follows: 1. square resistance: measurement using a four-probe sheet resistance tester

2. Viscosity: measurement using a rotational viscometer

3. Saturation temperature: measured using an infrared camera.

FIG. 3(a) is a graph of the operating conditions of a 3cm × cm low voltage thermal ink block prepared in example 1 of the present invention under different voltages, the thermal data of direct current voltages of 1.0v, 1.5v, 2.0v, 2.5v and 3.0v are respectively switched on, the temperature response rate of the low voltage thermal ink block and the saturation temperature of the low voltage thermal ink block under each operating voltage are tested, it can be seen that the temperature influence speed is fast, the saturation temperature can be reached by switching on the power supply for about 10S, the required voltage is extremely low, the heating efficiency is high, the temperature rise rate is fast, when 1.0v voltage is applied to the low voltage thermal ink block, the operating current is 0.28A, the saturation temperature can be reached is about 47 ℃, when 1.5v voltage is switched on, the operating current is 0.428A, the saturation temperature is 70 ℃; when 2.0v voltage is applied, the operating current is 0.583A, the saturation temperature is 100 ℃; when 2.5v voltage is applied, the operating current is 0.749A, the saturation temperature is 70 ℃; when the constant, the operating voltage is reached, the operating voltage is a constant, the operating voltage is a constant, the operating voltage is obtained when the operating voltage of the thermal ink block, the thermal ink block is a thermal ink block, the thermal voltage is stable, the thermal voltage is generated, the thermal ink block, the thermal voltage is generated under the low voltage is generated, the thermal voltage is generated under the thermal voltage, the constant temperature is about 0.2.0.0.0 v, the thermal voltage is stable under the constant temperature is generated_r ⁴-T₀ ⁴) a/P of the formulaZhong β is the electrothermal radiation conversion efficiency of the electrothermal film, S is the heating area of the electrothermal film, α is the Spandersman-Boltzmann constant (5.67 × 10)^-8In the unit of W/m²K⁴)，T_rIs the saturation temperature, T, at a certain operating voltage₀The formula shows that the electrothermal radiation conversion efficiency β of the low-voltage heating ink block under the working voltage of 3v is 74.75 percent and is about 10 percent higher than that of the traditional electrothermal material.

The carbon material is stable in chemical property, can stably exist in the air, is not suitable for reacting with oxygen, the aqueous acrylic resin used by the low-voltage heating ink block is stable and does not decompose in the air below 250 ℃, and the conductive carbon particles are stable and does not decompose in the air below 400 ℃, so that the prepared low-voltage heating ink block can continuously and stably work at the running temperature below 200 ℃. To further verify that the low voltage heat-generating ink block can continuously and stably operate at high temperature (175 ℃), the low voltage heat-generating ink block is modulated to have higher working voltage (3.0v) and is kept for more than 4h in the operation state at 175 ℃. As shown in fig. 4, the temperature and time variation relationship shows that the saturation temperature remains unchanged in the high temperature state, which indicates that the electrothermal infrared radiation efficiency of the low voltage heat-generating ink block, and the composition and performance of the ink are not changed, which is enough to prove that the stability of the low voltage heat-generating ink in the air and in the high temperature state is very outstanding.

Fig. 5 shows a functional relationship between the heating temperature and the power density of the low-voltage heating ink block prepared in this embodiment, and a fitted curve of the temperature and the power density is approximately linear (T ═ 249 × P +37, T is the temperature, and P is the energy density), and as can be seen from the graph, the slope is steep (about 249.53 ℃ c, cm2W-1), which indicates that the saturation temperature that can be reached per unit area under the same power density condition is higher, i.e., the electrothermal infrared radiation efficiency is higher, which indicates that the electrothermal infrared radiation efficiency of the low-voltage heating ink block prepared based on this embodiment is higher, and the energy consumption is lower.

Fig. 6 is a graph of the volt-ampere (V-a) relationship of the low voltage heat-generating ink stick prepared in this example, and it can be seen from the fitted curve that the voltage V applied to the low voltage heat-generating ink stick is almost proportional to the passing current a, indicating that the resistance of the low voltage heat-generating ink stick does not change with the increase of temperature (the saturation temperature is 47 ℃ at 1.0V to 175 ℃ at 3.0V), i.e., the resistance does not change with the change of temperature.

Fig. 7 is a graph of the relationship between the input voltage and the saturation temperature of the low-voltage heat-generating ink block prepared in this example, and it can be seen from the fitted curve in the graph that the saturation temperature reached when the low-voltage heat-generating ink block is powered on is exponential to the voltage applied at both ends: t ═ A₁exp(-V/t₁)-y₀Where T is the saturation temperature of the electrothermal film, V is the voltage at which it is switched on, A₁＝39.98±13.40，t₁＝-1.91±0.31，y₀-14.84 ± 16.71. The exponential relationship between temperature and voltage shows that the conversion efficiency of the low-voltage heat-generating ink block prepared in the embodiment through infrared heat radiation is high.

The low-voltage heating ink block is placed in a room-temperature air environment, the same voltage of 3.0v is applied to the same low-voltage heating ink block for ten consecutive days, the temperature response rate and the maximum saturation temperature of the low-voltage heating ink block are almost unchanged, the stable operation in the air is shown, and the advantage of the low-voltage heating ink block is obvious compared with some metal electrothermal materials (such as silver electrothermal materials) which are easy to oxidize in the air. In addition, in order to verify that the folding resistance test of the flexible electric heating material is carried out for 2500 folds continuously, the resistance of the low-voltage heating ink block is not changed obviously, and the resistance is regular along with the change of the bending angle, which shows that after 2500 folds, the ink on the flexible electric heating film is connected perfectly and is not broken. The pressure resistance of the material is extremely outstanding and is 1x10 when the material is subjected to pressure test by a tablet press⁵The structure is not destroyed under a pressure below kpa. The excellent compression resistance and folding resistance make the mask more beneficial to the preparation of the mask, and convenient for transportation, storage and use.

Example 2:

weighing 7% of water-based acrylic resin, 7% of rosin resin, 5% of graphite, 10% of carbon black, 35% of carbon nanotube dispersion liquid, 1% of ethanolamine, 5% of Disponer W-920 type water-based wetting dispersant, 0.3% of xanthan gum, 0.5% of DefomW-0506 type water-based defoaming agent and 29.2% of deionized water according to parts by mass.

Placing 7% of water-based acrylic resin, 7% of rosin resin, 1% of ethanolamine and 29.2% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black, 5% of graphite, 35% of carbon nanotube dispersion liquid and 0.3% of xanthan gum, uniformly stirring, finally adding 5% of Disponer W-920 type water-based wetting dispersant and 0.5% of DefomW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the embodiment has the viscosity of 9000-11000 mPa & s under stirring at the rotating speed of 12r/min, the viscosity of 4000-5000 mPa & s under stirring at the rotating speed of 60r/min, the thickness of the dried ink layer is 15-18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 10.6 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 72 ℃.

Example 3:

respectively weighing 10% of waterborne acrylic resin, 5% of rosin resin, 12% of graphite, 6% of carbon black, 40% of carbon nanotube dispersion liquid, 1.5% of ammonia water, 5% of NUOSPERSE FX 365 type waterborne wetting dispersant, 0.4% of xanthan gum, 1% of SF-809B type standard American silicon fluorine defoaming agent and 19.1% of deionized water according to the mass parts.

Placing 10% of water-based acrylic resin, 5% of rosin resin, 1.5% of ethanolamine and 19.1% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 6% of carbon black, 12% of graphite, 40% of carbon nanotube dispersion and 0.4% of xanthan gum, uniformly stirring, finally adding 5% of NUEROSPSE FX 365 type water-based wetting dispersant and 1% of SF-809B type standard silicon fluorine defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the embodiment has the viscosity of 15000-20000 mPa & s under stirring at the rotating speed of 12r/min, the thickness of the dried ink layer is 20-22 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen plate once, and the sheet resistance value of the low-voltage heating ink is 8.9 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 76 ℃.

Example 4:

weighing 5% of water-based acrylic resin, 10% of rosin resin, 9% of graphite, 6% of carbon black, 30% of carbon nanotube dispersion liquid, 0.5% of ethanolamine, 4% of a mixture of Disponer W-920 type water-based wetting dispersant and NUOSPERSE FX 600 type water-based wetting dispersant, 0.5% of xanthan gum, 0.5% of TEGO Foamex 805 type water-based defoaming agent and 34.5% of deionized water according to parts by mass.

Placing 5% of water-based acrylic resin, 10% of rosin resin, 0.5% of ethanolamine and 34.5% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 6% of carbon black, 9% of graphite, 30% of carbon nanotube dispersion and 0.5% of xanthan gum, uniformly stirring, finally adding a mixed solution of 4% of Disponer W-920 type water-based wetting dispersant and NUOSPERSE FX 600 type water-based wetting dispersant and 0.5% of TEGO Foamex 805 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 3 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the example has viscosity of 12000mPa & s under stirring at a rotating speed of 12r/min, the thickness of the dried ink layer is 19 μm, the low-voltage heating ink can be used for screen printing of a 200-mesh screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.6 omega/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 70 ℃.

Example 5:

respectively weighing 10% of water-based acrylic resin, 10% of rosin resin, 15% of graphite, 10% of carbon black, 1.5% of ethanolamine, 5% of NUOSPERSE FX 365 type water-based wetting dispersant, 1% of DefomW-0506 type water-based defoaming agent and 47.5% of deionized water according to parts by weight.

Placing 10% of water-based acrylic resin, 10% of rosin resin, 1.5% of ethanolamine and 47.5% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black and 15% of graphite, uniformly stirring, finally adding 5% of NUOSPERSE FX 365 type water-based wetting dispersant and 1% of DefomW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 3 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the example has a viscosity of 18000mPa · s under stirring at a rotation speed of 12r/min, has a thickness of 23 μm after drying, can be used for screen printing of a 200-mesh screen printing plate once, and has a sheet resistance value of 12.8 Ω/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 68 ℃.

Example 6:

weighing 7.5% of water-based acrylic resin, 7.5% of rosin resin, 5% of graphite, 8% of carbon black, 50% of carbon nanotube dispersion liquid, 0.8% of ammonia water, 1% of Disponer W-920 type water-based wetting dispersant, 1% of xanthan gum, 0.3% of mixed liquid of TEGO Foamex 805 type water-based defoamer and SF-809B type standard silicon fluorine defoamer and 18.9% of deionized water according to parts by weight.

Placing 7.5% of water-based acrylic resin, 7.5% of rosin resin, 0.8% of ammonia water and 18.9% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 8% of carbon black and 5% of graphite, uniformly stirring, finally adding a mixed solution of 1% of Disponer W-920 type water-based wetting dispersant, 0.3% of TEGO Foamex 805 type water-based defoaming agent and SF-809B type standard silicon fluorine defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 1h, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heating ink obtained in the embodiment has the viscosity of 11000mPa & s under the stirring at the rotating speed of 12r/min, the thickness of the dried ink layer is 18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.0 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 76 ℃.

Example 7:

weighing 8% of water-based acrylic resin, 5% of rosin resin, 12% of graphite, 3% of carbon black, 40% of carbon nanotube dispersion liquid, 0.5% of formamide, 0.5% of ethanolamine, 3% of NUOSPERSE FX 365 type water-based wetting dispersant, 0.3% of xanthan gum, 0.6% of DefomW-0506 type water-based defoaming agent and 27.1% of deionized water according to parts by mass.

Placing 8% of water-based acrylic resin, 5% of rosin resin, 0.5% of formamide, 0.5% of ethanolamine and 27.1% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 3% of carbon black and 12% of graphite, uniformly stirring, finally adding 3% of NUOSPERSE FX 365 type water-based wetting dispersant and 0.6% of DefomoW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.

The low-voltage heat-generating ink obtained in the example has a viscosity of 13000mPa · s under stirring at a rotation speed of 12r/min, has a thickness of 21 μm after drying, can be used for screen printing of a 200-mesh screen printing plate once, and has a sheet resistance value of 10.9 Ω/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 71 ℃.

The low-voltage heating ink provided by the invention can obtain a better heating effect under a lower working voltage; the low-voltage heating ink has high viscosity and high thixotropy, the viscosity of the ink is instantly reduced under the action of shearing force in the printing process to form a thick carbon film, the viscosity is rapidly improved after the printing is finished, the ink is prevented from diffusing on a printing stock, the printing adaptability of the ink is improved, and the low-voltage heating ink is suitable for screen printing. The xanthan gum in the components can play a role in dispersing graphene, carbon black and graphite, can replace part of acrylic resin, and the addition of a small amount of rosin resin can make up the poor adhesive force and mechanical property of the xanthan gum; under the combined action of the xanthan gum and the rosin resin, the overall proportion of acrylic resin in the ink is reduced, the xanthan gum and the rosin resin are both biomass materials, the energy-saving and environment-friendly effects can be achieved, and in addition, the addition of the xanthan gum and the rosin resin enables the proportion of conductive fillers such as carbon black, graphite and carbon nano tubes in a carbon film formed after the prepared low-voltage heating ink is dried to be increased, and the conductivity is excellent.

Claims

1. A heating mask comprising at least a substrate layer, wherein: the substrate layer is sequentially provided with a microcapsule surface film layer, an isolating layer, a low-voltage heating ink layer and a covering layer, the microcapsule surface film layer is microcapsules wrapping the surface film layer, and the low-voltage heating ink layer is connected with a power supply.

2. The heating mask as set forth in claim 1, wherein: the power supply is a USB interface or a switch and a battery which can be connected with electricity, the USB interface or the switch is positioned at the edge of the heating mask, and the low-voltage heating ink layer is connected with the power supply through conductive ink or conductive metal.

3. The heating mask as set forth in claim 1, wherein: the microcapsule is prepared by one or more of sodium alginate, chitosan, gelatin and porous starch in any proportion.

4. The heating mask as set forth in claim 1, wherein: the isolation layer is made of paper or cloth.

5. The heating mask as set forth in claim 1, wherein: the base layer and the cover layer are non-woven fabrics.

6. The heating mask as set forth in claim 1, wherein: the low-voltage heating ink layer comprises the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water.

7. The heating mask as set forth in claim 6, wherein: the low-voltage heating ink layer is formed by coating low-voltage heating ink on the substrate layer through a screen printing or coating method.

8. The heating mask as set forth in claim 6, wherein: the pH regulator is one or more of formamide, ethanolamine or ammonia water mixed in any proportion.

9. The heating mask as set forth in claim 6, wherein: the dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a mixture of the two in any proportion.

10. The heating mask as set forth in claim 6, wherein: the defoaming agent is one or more of a DefomW-0506 type waterborne defoaming agent, a TEGO Foamex 805 type waterborne defoaming agent or a SF-809B type standard silicon fluoride defoaming agent which is mixed in any proportion.