Constant temperature heating material, intelligent constant temperature patch and constant temperature hot compress method

Abstract

The application discloses a kind of intelligent constant temperature dressings, including heating patch body, heating patch body is by iron powder heating material, solid solid phase change energy storage material and heating patch coating, iron powder heating material is placed in heating patch coating, the front side of heating patch coating is equipped with the adherent surface that can be pasted to skin, the middle part of adherent surface is equipped with the hot compress site for the heating action of iron powder heating material on skin, solid solid phase change energy storage material is located hot compress site side to adjust hot compress site temperature.The application provides a kind of intelligent constant temperature dressings, which adjusts heating patch temperature by the heat absorption and release effect of phase change material near phase change point, realizes self constant temperature.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of biological medical technology, and particularly relates to a constant-temperature heating material, an intelligent constant-temperature patch and a constant-temperature hot compress method. BACKGROUND

[0002] In the medical field, hot compress bags and heating patches are usually used for periarthritis of shoulder, lumbago, joint pain, sciatica, soft tissue injury, cold stomach, abdominal pain and the like.

[0003] The heating agent used in the existing heating patch similar to the moxibustion therapy of traditional Chinese medicine is mostly in powder form, which is generally composed of heating material such as vermiculite, activated carbon, iron powder, salt and water. The heat energy generated by the oxidation reaction of the iron powder in the heating material controls the temperature in a certain range and is used for winter heating, local hot compress physiotherapy and fast food heating.

[0004] The existing heating patch uses iron powder heating material, and the temperature control is achieved by limiting air penetration. This control method can achieve a parallel error of about 5 degrees under standard ambient temperature and insulation conditions, but under non-standard conditions such as too thick insulation layer, low external temperature and large air flow rate, the temperature performance will be amplified or reduced, resulting in skin burns or low temperature sensation and reducing the use experience. SUMMARY

[0005] The present application provides a constant-temperature heating material, an intelligent constant-temperature patch and a constant-temperature hot compress method, which adjusts the constant temperature of the heating patch by absorbing heat at high temperature and releasing heat at low temperature of the phase change material.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] A constant-temperature heating material, characterized in that: a solid-solid phase change energy storage particle is prepared by coating a phase change energy storage material with a high molecular wall material containing water and salt, and then mixed with iron powder and activated carbon to form a constant-temperature heating material, and the mass ratio of the activated carbon, the solid-solid phase change energy storage particle and the iron powder is 1-3:6-10:7-10.

[0008] The constant-temperature heating material described above, characterized in that: the solid-solid phase change energy storage particle is in a spherical or microcapsule shape, and the diameter is 0.1-2mm.

[0009] The constant-temperature heating material described above, characterized in that: the solid-solid phase change energy storage particle is a microcapsule particle made of core material and wall material by sharp hole-coagulation bath method.

[0010] The core material is an emulsified wax solution containing a coagulant, which contains, by mass ratio:

[0011] 20-40 parts of phase change wax or fatty acid with a phase change point of 45-55℃;

[0012] Emulsifier 4-10 parts;

[0013] Pure water 49-80 parts;

[0014] Calcium chloride 1-5 parts;

[0015] The wall material: 10-30 parts of sodium alginate or sodium acrylate, and a 1%-3% sodium alginate or sodium acrylate solution prepared by dissolving sodium alginate or sodium acrylate in deionized water.

[0016] A method for preparing the solid-solid phase change energy storage particles, characterized in that: 20-40 parts of phase change wax or fatty acid with a phase change point of 45-55°C are taken, melted, 4-10 parts of emulsifier is added, heated to 80°C, and then 49-80 parts of pure water is added under high-speed stirring, and then 1-5 parts of calcium chloride is added to prepare an emulsified wax solution containing a coagulant; 10-30 parts of sodium alginate or sodium acrylate is taken and dissolved in deionized water to prepare a 1%-3% sodium alginate or sodium acrylate solution as a wall material; the emulsified wax solution is used as a core material, and the sodium alginate or sodium acrylate solution is used as a wall material; microcapsules are prepared by using a sharp hole-coagulation bath method, the microcapsules are taken out and placed in a solution containing 6% sodium chloride and 3% calcium chloride, then filtered out, and then part of the water is removed to obtain solid-solid phase change energy storage particles containing 30-50% water and 4-5% sodium chloride in the form of particles.

[0017] An intelligent constant-temperature patch with the built-in constant-temperature heating material, characterized in that: the patch includes a heating patch covering layer with a sealing structure, a containing cavity is arranged in the heating patch covering layer, a breathable hole is arranged on the upper side of the containing cavity, the constant-temperature heating material is filled in the containing cavity, an adhesive surface capable of being attached to the skin is arranged on the front side of the heating patch covering layer, a hot compress part for the constant-temperature heating material to act on the skin is arranged in the middle of the adhesive surface, and the containing cavity extends to the inner side of the hot compress part.

[0018] The intelligent constant-temperature patch as described above, characterized in that: pressure-sensitive adhesive is coated on the adhesive surface, and the pressure-sensitive adhesive is arranged around the peripheral area of the hot compress part.

[0019] A constant-temperature heating method of an intelligent constant-temperature patch, characterized in that: the constant-temperature heating material on the intelligent constant-temperature patch absorbs or releases energy around the phase change point through the solid-solid phase change energy storage material,

[0020] First step: the outside air enters, the iron powder on the constant-temperature heating material is oxidized to generate heat, the hot compress part on the intelligent constant-temperature patch is heated to a temperature higher than the phase change temperature of the solid-solid phase change energy storage material, the solid-solid phase change energy storage material is converted from a solid state to a liquid state to absorb heat, and the solid-solid phase change energy storage material after heat absorption is limited in the spherical or microcapsule wall material to store heat energy, and the heat energy is prepared for heat release in the subsequent constant-temperature hot compress in the range of ±1°C around the phase change temperature;

[0021] Second step, the temperature of the hot compress part on the intelligent constant temperature compress patch decreases to the heating temperature of the constant temperature heating material, which is lower than the phase change temperature of the solid-solid phase change energy storage material, the solid-solid phase change energy storage material changes from liquid to solid and releases heat, and the solid-solid phase change energy storage material after heat release is limited in the wall material in the form of a ball or a microcapsule, and is prepared for subsequent heat absorption again.

[0022] Third step, within the hot compress setting time, the heating temperature of the constant temperature heating material repeatedly fluctuates in the range of the phase change temperature of the solid-solid phase change energy storage material, the first step and the second step are alternately performed, and the temperature of the hot compress part on the intelligent constant temperature compress patch is always within the range of the phase change temperature of the solid-solid phase change energy storage material ± 1 ℃.

[0023] The present application has the advantages and positive effects that:

[0024] 1. The hot compress patch is used for medical treatment and needs to be attached to the skin, and the effective temperature and the safe temperature range of the hot compress are relatively small, and the temperature control range of the hot compress product is the most important performance requirement. The present application absorbs or releases energy around the phase change point through the phase change material, releases heat when the temperature is lower than the phase change temperature, and absorbs heat when the temperature is higher than the phase change temperature. The heating temperature of the hot compress patch is self-adjusted to remain constant, the hot compress temperature error can reach the design requirement of ± 1 ℃, and the defect of large temperature fluctuation in the prior art is overcome.

[0025] 2. The microcapsule granular solid-solid phase change energy storage material is coated with water-absorbing sodium alginate, the water-containing microcapsule granular material can replace water-absorbing resin, expanded vermiculite or expanded perlite and other water-containing components, and is used to prepare iron powder heating material, so that the constant temperature of the hot compress patch can be realized without obvious increase in the overall volume. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure diagram of the intelligent constant temperature compress patch. DETAILED DESCRIPTION

[0027] In order to better understand the present application, the present application will be further described below in combination with specific embodiments.

[0028] As shown in Figure 1 An intelligent constant temperature compress patch includes a sealed bag (not shown in the figure), a heating patch coating layer 1 is arranged in the sealed bag, an adhering surface 11 capable of being attached to the skin is arranged on the front side of the heating patch coating layer 1, a hot compress part 110 for the heating action of iron powder heating material 2 on the skin is arranged in the middle of the adhering surface 11, and pressure-sensitive adhesive 4 is coated on the adhering surface 11 and surrounds the peripheral area of the hot compress part 110. The pressure-sensitive adhesive 4 is used to help the hot compress patch to be attached to the skin.

[0029] The heat patch package layer 1 is provided with a cavity 12, which extends to the inner side of the adhesive surface 11, so that a hot compress part 110 with the same cross-sectional area as the cavity is formed in the middle of the adhesive surface 11. The cavity 12 is filled with a constant-temperature heating material 2, and the upper side of the cavity 12 is provided with air holes 13.

[0030] The adhesive surface 11 of the heat patch package layer 1 is a composite film non-woven fabric. The composite film non-woven fabric is made of a non-woven fabric and a breathable film.

[0031] In the present application, the solid-solid phase change energy storage particles are mixed with iron powder and activated carbon black to form a constant-temperature heating material after being coated with a high-molecular wall material containing water and salt. The mass ratio of the constant-temperature heating material is activated carbon: solid-solid phase change energy storage particles: iron powder = 1-3: 6-10: 7-10. The solid-solid phase change energy storage particles are in the shape of a spherical shell or a capsule, with a diameter of 0.1-2mm.

[0032] In the present application, the solid-solid phase change energy storage particles are microcapsule particles made by using a sharp hole-coagulation bath method. The core material is an emulsified wax solution containing a coagulant, which contains, by mass ratio, 20-40 parts of phase change wax or fatty acid with a phase change point of 45-55℃; 4-10 parts of emulsifier (wax emulsifier from Haian Petroleum Chemical Plant); 49-80 parts of pure water; and 1-5 parts of calcium chloride. The wall material is 10-30 parts of sodium alginate or sodium acrylate, and the sodium alginate or sodium acrylate solution is 1%-3% in deionized water. The sodium alginate or sodium acrylate solution is in excess during operation.

[0033] In the present application, the method for making the heating material on the constant-temperature patch is as follows:

[0034] First step: Take 20-40 parts of phase change wax or fatty acid with a phase change point of 45-55℃, melt and add 4-10 parts of emulsifier (wax emulsifier from Haian Petroleum Chemical Plant), heat to 80℃, and then add 49-80 parts of pure water under high-speed stirring, and then add 1-5 parts of calcium chloride to make an emulsified wax solution containing a coagulant. Take another 10-30 parts of sodium alginate or sodium acrylate and dissolve in deionized water to form a 1%-3% sodium alginate or sodium acrylate solution.

[0035] Second step: Take the emulsified wax solution as the core material and the sodium alginate or sodium acrylate solution as the wall material, and inject the above-mentioned capsule core emulsion into the shell material solution through a high-pressure spray gun to form a film around the capsule core under the action of the coagulant, and coat it into a microcapsule phase change energy storage particle. Alternatively, the capsule core liquid can be injected into the shell material solution in the form of microdroplets to coat it into a microcapsule energy storage particle. The particle size of the prepared solid-solid phase change material is 0.1-2mm, and the water content is 30-50%.

[0036] Third step: The microcapsule phase change energy storage particles are taken out and put into 3% calcium chloride and 6% sodium chloride solution, completely solidified and then filtered out, and part of the water is removed to obtain 30-50% water and 4-5% sodium chloride. The prepared water-containing energy storage micro-particles are used to prepare the constant temperature heating material.

[0037] Fourth step: The constant temperature heating material is prepared according to the following ratio: active carbon: solid-solid phase change energy storage particles: iron powder = 1-3: 6-10: 7-10. Example 1

[0038] First step: 20g of phase change wax with a phase change point of 45℃ is taken, melted, 5.5 parts of emulsifier (paraffin emulsifier of Haian Petroleum Chemical Plant) is added, heated to 80℃, and then 72.5 parts of pure water is added under high-speed stirring, and then 2 parts of calcium chloride is added to prepare an emulsified wax solution containing a coagulant; 30 parts of sodium alginate is taken and dissolved in 970 parts of deionized water to prepare a wall material solution.

[0039] Second step: The above-mentioned core emulsion is injected into the wall material solution through a high-pressure spray gun, and a film is formed around the core under the action of the coagulant.

[0040] Third step: The gel particles are filtered and washed with clean water, and then dispersed in a 3% calcium chloride and 6% sodium chloride solution to solidify and filter out. Part of the water is removed to obtain 0.1-2mm in particle size, 30% water content, and solid-solid phase change material microcapsule phase change energy storage particles for standby.

[0041] Fourth step: The constant temperature heating material is prepared according to the following ratio: active carbon: solid-solid phase change energy storage particles: iron powder = 2:7:10. Example 2

[0042] First step: According to the mass ratio, 25 parts of phase change wax with a phase change point of 48℃ is taken, melted, 5.5 parts of emulsifier (paraffin emulsifier of Haian Petroleum Chemical Plant) is added, 30 parts of 1% chitosan acetic acid solution is added under high-speed stirring, and then 49.5 parts of pure water is added to prepare an emulsified wax solution containing a coagulant; 10 parts of sodium acrylate is taken and dissolved in 990 parts of deionized water to prepare a wall material solution.

[0043] Second step: The above-mentioned core emulsion is injected into the wall material solution through a high-pressure spray gun, and a film is formed around the core under the action of the coagulant.

[0044] Third step: The gel particles are filtered and washed with clean water, and then dispersed in a 3% calcium chloride and 6% sodium chloride solution to solidify and filter out. Part of the water is removed to obtain 0.1-2mm in particle size, 30% water content, and solid-solid phase change material microcapsule phase change energy storage particles for standby.

[0045] Fourth step: The constant temperature heating material is prepared according to the following ratio: active carbon: solid-solid phase change energy storage particles: iron powder = 2:7:10.

[0046] The application discloses a temperature control method of an intelligent constant-temperature compress, and relates to the technical field of compresses.

[0047] When the compress is used, the sealed bag is torn open, air enters the cavity 12 through the air holes 13, and the iron powder generates heat to realize constant-temperature hot compress.

[0048] In the application, the wall material is sodium alginate, sodium acrylate or chitosan, and the phase change energy storage material is phase change energy storage wax, polyethylene glycol or fatty acid.

[0049] The application principle is that, on the basis of the iron powder chemical heating technology, solid-solid phase change energy storage particles are added, the phase change point of the phase change energy storage material in the solid-solid phase change energy storage particles is constant, when the iron powder heating temperature rises to the phase change point, the solid-solid phase change energy storage particles absorb heat, the phase state of the phase change energy storage material changes from solid to liquid, so that the hot compress part 110 is maintained at the phase change point temperature, when the iron powder heating temperature drops below the phase change point, the phase change energy storage material releases heat, and the phase state changes from liquid to solid, so that the hot compress part 110 is continuously maintained at the phase change point temperature.

[0050] The above-mentioned embodiments of the application have been described in detail, but the content described is only the preferred embodiments of the application, and cannot be considered as limiting the scope of the application. Any equivalent changes and improvements within the scope of the application should still belong to the scope of the patent.

Claims

1. A constant-temperature heating material, characterized in that: Solid-solid phase change energy storage particles are prepared by coating phase change energy storage materials with water- and salt-containing polymer wall materials. These particles are then mixed with iron powder and activated carbon to form a constant temperature heating material. The constant temperature heating material is prepared by a mass ratio of activated carbon: solid-solid phase change energy storage particles: iron powder of 1-3:6-10:7-10. The solid-solid phase change energy storage particles are spherical or microcapsule-shaped, with a diameter of 0.1-2 mm; The method for preparing solid-solid phase change energy storage particles includes: taking 20-40 parts by mass of phase change wax or fatty acid with a phase change point of 45-55℃, melting it, adding 4-10 parts of emulsifier, heating to 80℃, adding 49-80 parts of purified water under high-speed stirring, and then adding 1-5 parts of calcium chloride to prepare an emulsified wax solution containing a coagulant; separately taking 10-30 parts of sodium alginate or sodium acrylate and dissolving it in deionized water to prepare a 1%-3% sodium alginate or sodium acrylate solution as a wall material; using the emulsified wax solution as the core material and the sodium alginate or sodium acrylate solution as the wall material, preparing microcapsules using a sharp-hole-coagulation bath method, removing the microcapsules and placing them in a solution containing 6% sodium chloride and 3% calcium chloride, then filtering them out to remove some water, obtaining solid-solid phase change energy storage particles containing 30-50% water and 4-5% sodium chloride.

2. A smart constant-temperature dressing with built-in constant-temperature heating material as described in claim 1, characterized in that: The heating patch includes a heating patch cover with a sealed structure. The heating patch cover has a cavity with a vent on the upper side. The cavity is filled with a constant temperature heating material. The front side of the heating patch cover has an adhesive surface that can be adhered to the skin. The middle part of the adhesive surface is a heat application area for the constant temperature heating material to heat up and act on the skin. The cavity extends to the inside of the heat application area.

3. The intelligent constant temperature dressing according to claim 2, characterized in that: The adhesive surface is coated with pressure-sensitive adhesive, which is arranged around the periphery of the heat-applied area.

4. A method for constant temperature heating of the intelligent constant temperature dressing as described in claim 2, characterized in that: The temperature-regulating heating material in the intelligent constant-temperature dressing absorbs or releases energy around the phase change point through a solid-solid phase change energy storage material. Step 1: When outside air enters, the iron powder on the constant temperature heating material oxidizes and generates heat. The heating area on the smart constant temperature patch heats up until the heating temperature of the constant temperature heating material is higher than the phase change temperature of the solid-solid phase change energy storage material. The solid-solid phase change energy storage material changes from solid to liquid and absorbs heat. After absorbing heat, the solid-solid phase change energy storage material is confined in spherical or microcapsule-shaped wall material to store heat energy, preparing for subsequent constant temperature heat application within ±1℃ of the phase change temperature. The second step is that the temperature of the hot compress area on the intelligent constant temperature patch drops to the temperature of the constant temperature heating material, which is lower than the phase change temperature of the solid-solid phase change energy storage material. The solid-solid phase change energy storage material changes from liquid to solid and releases heat. After releasing heat, the solid-solid phase change energy storage material is confined in spherical or microcapsule-shaped wall material to prepare for subsequent heat absorption. The third step involves the constant-temperature heating material fluctuating repeatedly within the range of the phase change temperature of the solid-solid phase change energy storage material during the set heating time. The first and second steps are performed alternately to ensure that the temperature of the heating part on the intelligent constant-temperature patch is always within ±1℃ of the phase change temperature of the solid-solid phase change energy storage material.

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