Traditional Chinese medicine self-heating bag

Abstract

The application provides a traditional Chinese medicine self-heating bag. The traditional Chinese medicine self-heating bag comprises a bag body and traditional Chinese medicine composition particles packaged in the bag body; the bag body comprises an inner layer adhering layer, a middle layer breathable temperature control layer and an outer layer protective layer which are sequentially compounded from inside to outside; the inner layer adhering layer is a breathable non-woven fabric, and the inner surface of the inner layer adhering layer is provided with uniformly distributed micro-convex anti-skid particles; the middle layer breathable temperature control layer is compounded by a porous breathable film and a heat-sensitive color-changing fiber; the outer layer protective layer is a waterproof non-woven fabric, and the edge of the outer layer protective layer is provided with an adjustable magic tape closing structure; the traditional Chinese medicine composition particles are made of the following raw materials in parts by weight: 100-200 parts of Amomum tsao-ko, 50-100 parts of Amomum costatum, 75-150 parts of Evodia rutaecarpa, and 50-100 parts of Alpinia oxyphylla, and the particle size of the traditional Chinese medicine composition particles is 80-120 meshes.

Description

Technical Field

[0001] This invention belongs to the field of traditional Chinese medicine external treatment device technology, specifically relating to a self-heating pack made of traditional Chinese medicine. Background Technology

[0002] Utilizing heat to aid the penetration of traditional Chinese medicine (TCM) ingredients is one of the core principles of traditional external therapies (such as moxibustion and ironing). However, current self-heating TCM packs still suffer from several technical shortcomings: the pack structure is simple, often using a single layer of non-woven fabric, making it easy for internal TCM particles to shift and clump together, resulting in uneven heating and potentially causing burns due to excessively high local temperatures. Furthermore, the release of TCM ingredients is uncontrollable; volatile oils from herbs are easily lost with the heat during the heating process, leading to low utilization of effective components and significantly reduced therapeutic efficacy.

[0003] Therefore, there is an urgent need in this field for a new type of self-heating device for traditional Chinese medicine that can achieve safe, long-lasting, and constant-temperature heating, and can intelligently control the release and efficiently penetrate the effective components of traditional Chinese medicine during the process, while also being flexible in use and reusable (referring to the packaging). Summary of the Invention

[0004] The present invention aims to provide a self-heating pack made of traditional Chinese medicine to solve the technical problems of existing self-heating patches being unable to achieve long-term sustained release and efficient penetration of traditional Chinese medicine ingredients at a safe temperature, as well as the mutual interference between heating materials and traditional Chinese medicine and the inflexibility of use.

[0005] A self-heating pack containing traditional Chinese medicine (TCM) comprises a pack body and TCM composition granules encapsulated within the pack body. The pack body comprises, from the inside out, an inner bonding layer, a middle breathable and temperature-controlled layer, and an outer protective layer, layered sequentially. The inner bonding layer is made of breathable non-woven fabric with uniformly distributed micro-convex anti-slip particles on its inner surface. The middle breathable and temperature-controlled layer is composed of a porous breathable membrane and thermosensitive color-changing fibers. The outer protective layer is made of waterproof non-woven fabric with an adjustable Velcro closure at its edges. The TCM composition granules are made from the following raw materials in parts by weight: 100-200 parts of Amomum tsao-ko, 50-100 parts of Amomum villosum, 75-150 parts of Evodia rutaecarpa, and 50-100 parts of Alpinia oxyphylla, with a particle size of 80-120 mesh.

[0006] Optionally, the porous breathable membrane is a microporous polyurethane membrane or an expanded polytetrafluoroethylene membrane with a pore size of 0.1-10 μm; the thermosensitive color-changing fiber is a fiber made by blending reversible thermochromic material with a polymer substrate and spinning, with a color-changing temperature of at least one of 40℃, 50℃, and 65℃.

[0007] Optionally, in the middle breathable and temperature-controlled layer, the porous breathable membrane and the thermosensitive color-changing fiber are interwoven and combined in a woven, knitted or non-woven manner, and the thermosensitive color-changing fiber is distributed in a grid pattern.

[0008] Optionally, the micro-protruding anti-slip particles on the inner bonding layer are made of food-grade silicone or thermoplastic polyurethane material, and are fixed to the surface of the breathable non-woven fabric by dispensing or hot pressing. The particle height is 0.2-0.5 mm, and the distribution density is 20-50 particles / cm². 2 .

[0009] Optionally, the Velcro closure structure includes a hook-and-loop band on one side of the opening edge of the outer protective layer and a fleece band on the other side, wherein the fleece band is longer than the hook-and-loop band to achieve stepless adjustment of the tightness of the wrap.

[0010] Optionally, the granules of the traditional Chinese medicine composition are prepared by the following method: Amomum tsao-ko, Amomum villosum, Evodia rutaecarpa, and Alpinia oxyphylla are dried, pulverized, and passed through an 80-120 mesh sieve. They are then mixed evenly in a specific ratio to obtain a mixed powder. 3-8% by weight of medical starch paste is added as a binder to form a soft material. This soft material is then granulated through a 20-40 mesh sieve, dried at a low temperature of 50-60℃ until the moisture content is below 8%, and then granulated again through an 80-120 mesh sieve to obtain the final product.

[0011] A method for using the above-mentioned self-heating pack made of traditional Chinese medicine includes the following steps: tighten the Velcro, place the pack on the area to be heated, drip or spray water from the outer protective layer inward until the heat-sensitive color-changing fibers of the middle breathable temperature-controlling layer show a color change, and then the pack begins to heat up.

[0012] The above-mentioned self-heating packs made of traditional Chinese medicine are used in the preparation of local heat therapy products for promoting the recovery of postoperative gastrointestinal function and relieving abdominal pain, wind-cold-dampness syndrome, soreness of the waist and knees or dysmenorrhea.

[0013] A method for preparing the above-mentioned self-heating pack of traditional Chinese medicine, characterized by comprising the following steps: S1: Preparation of inner bonding layer: forming micro-convex anti-slip particles by applying adhesive or hot pressing on the inner surface of breathable non-woven fabric; S2: Preparation of the middle breathable and temperature-controlled layer: The porous breathable membrane is combined with the thermosensitive color-changing fiber through weaving, knitting or non-woven processes; S3: Prepare the outer protective layer: Sew the hook and loop fasteners and the fleece tape to the edge of the opening of the waterproof nonwoven fabric; S4: Composite: The inner bonding layer, the middle breathable and temperature-controlled layer, and the outer protective layer are bonded together along the edges using environmentally friendly hot melt adhesive or ultrasonic welding to form a bag-shaped package that is sealed on three sides and open on one side.

[0014] A thermotherapy device includes the aforementioned self-heating pack made of traditional Chinese medicine and a fixation strap or patch for securing the self-heating pack to a part of the human body.

[0015] Beneficial effects In this invention, the porous membrane structure of the middle breathable temperature-controlling layer restricts the exchange rate of oxygen and vapor. Combined with the particle size of the traditional Chinese medicine granules, the oxidative heating reaction is controlled in a stable state, allowing the core temperature to remain stable within the safe treatment window of 40-65℃ for an extended period. The thermosensitive color-changing fiber provides real-time and intuitive temperature feedback; it changes color to warn of temperatures exceeding the safe range (e.g., >65℃), effectively preventing burns.

[0016] Furthermore, the inner anti-slip particles prevent particle caking and maintain uniform pore size. The micropores of the middle porous membrane and the particle size (80-120 mesh) form a double diffusion barrier, allowing the effective ingredients such as volatile oils from traditional Chinese medicine to be released slowly and continuously under heat-driven conditions, avoiding instantaneous release peaks and rapid depletion, thus maintaining long-lasting efficacy for more than 4 hours. Simultaneously, heat promotes the dilation of skin capillaries, significantly increasing the transdermal absorption rate and amount of the ingredients.

[0017] Furthermore, the selected herbs—Amomum tsao-ko (drying dampness and warming the middle jiao), Amomum villosum (drying dampness, promoting qi circulation, warming the middle jiao and stopping vomiting), Evodia rutaecarpa (dispersing cold and relieving pain, suppressing nausea and vomiting), and Alpinia oxyphylla (warming the spleen and kidneys)—are all pungent and warm in nature, enter the spleen, stomach, and kidney meridians, and are rich in volatile oils. In a warm environment, they work synergistically to achieve the powerful effects of warming the middle jiao and dispersing cold, resolving dampness and promoting qi circulation, and unblocking the meridians and relieving pain. They are particularly suitable for postoperative gastrointestinal dysfunction leading to symptoms such as flatulence, delayed defecation, nausea and vomiting, abdominal distension and abdominal pain, as well as joint pain, cold pain in the epigastrium and abdomen, and irregular menstruation caused by cold and dampness.

[0018] Furthermore, the inner layer provides a secure, non-slip grip, the middle layer controls and displays temperature, and the outer layer is waterproof and moisture-proof. The Velcro closure design allows a single bag to adapt to different body parts and body shapes, and the inner core of Chinese herbal granules can be easily replaced, making the bag reusable, reducing long-term usage costs, and making it environmentally friendly and economical.

[0019] Furthermore, the raw materials are readily available, the technology is mature, and it is easy to scale up production. The usage steps are simple; activation only requires adding water, and no power supply or other complicated operations are needed, making it ideal for adjunctive therapy in homes, outdoors, and medical institutions. Detailed Implementation

[0020] An embodiment of the present invention provides a self-heating pack for traditional Chinese medicine, comprising a pack body and granules of traditional Chinese medicine composition encapsulated within the pack body; the pack body comprises, from the inside out, an inner bonding layer, a middle breathable and temperature-controlled layer, and an outer protective layer; the inner bonding layer is a breathable non-woven fabric with uniformly distributed micro-convex anti-slip particles on its inner surface; the middle breathable and temperature-controlled layer is composed of a porous breathable membrane and a thermosensitive color-changing fiber; the outer protective layer is a waterproof non-woven fabric with an adjustable Velcro closure at its edges; the granules of traditional Chinese medicine composition are made from the following raw materials in parts by weight: 100-200 parts of Amomum tsao-ko, 50-100 parts of Amomum villosum, 75-150 parts of Evodia rutaecarpa, and 50-100 parts of Alpinia oxyphylla, and the particle size of the granules of traditional Chinese medicine composition is 80-120 mesh.

[0021] In some embodiments, the porous breathable membrane is a microporous polyurethane (PU) membrane or an expanded polytetrafluoroethylene (ePTFE) membrane with a pore size of 0.1-10 μm. The thermochromic fiber is a fiber made by blending and spinning a reversible thermochromic material with a polymer substrate, and the color-changing temperature is at least one of 40°C (low temperature warning), 50°C (treatment temperature), and 65°C (high temperature warning). Optionally, the polymer substrate is polyester, nylon, or polypropylene, etc. Optionally, the reversible thermochromic material uses a reversible thermochromic microcapsule pigment. This pigment uses an electron transfer type organic compound as the core material and gelatin-gum arabic, etc., as the wall material to form microcapsules through a complex coagulation method. This structure can effectively isolate moisture, prevent oxidation, and improve the stability of the color-changing performance. The reversible thermochromic microcapsule pigment is blended and melt-spun with a polymer substrate to form fibers. The amount of microcapsules added is preferably 3%-8% of the weight of the polymer substrate. This process allows the microcapsules to be uniformly dispersed inside the fiber, and the wash and friction resistance is better than that of surface-coated fibers. Alternatively, the reversible thermochromic material may be a commercially available product.

[0022] In some embodiments, in the middle breathable and temperature-regulating layer, the porous breathable membrane and thermosensitive color-changing fibers are interwoven and composited in a woven, knitted, or nonwoven manner, with the thermosensitive color-changing fibers distributed in a mesh-like pattern. The middle breathable and temperature-regulating layer uses woven, knitted, or nonwoven processes to composite the thermosensitive color-changing fibers with the porous breathable membrane in a mesh-like or strip-like form, creating a functional fabric that has both uniform breathable channels and a temperature visibility zone.

[0023] In some embodiments, the micro-protruding anti-slip particles on the inner bonding layer are made of food-grade silicone or thermoplastic polyurethane (TPU) material, which are fixed to the surface of the breathable nonwoven fabric by dispensing or hot pressing. The particle height is 0.2-0.5 mm, and the distribution density is 20-50 particles / cm². 2 .

[0024] In some embodiments, the hook and loop closure structure includes a hook-and-loop strip on one side of the opening edge of the outer protective layer and a fleece strip on the other side, wherein the fleece strip is longer than the hook-and-loop strip to achieve stepless adjustment of the tightness of the wrap. The hook and loop closure structure includes a hook-and-loop strip on one side of the opening edge of the outer protective layer and an extended fleece strip on the other side to achieve stepless and continuous adjustment of the tightness of the wrap.

[0025] In some embodiments, the granules of the traditional Chinese medicine composition are prepared by the following method: Amomum tsao-ko, Amomum villosum, Evodia rutaecarpa, and Alpinia oxyphylla are dried, pulverized, and passed through an 80-120 mesh sieve. They are then mixed evenly in a specific ratio to obtain a mixed powder. 3-8% by weight of medical starch slurry is added as a binder to form a soft mass. This is then granulated through a 20-40 mesh sieve, dried at a low temperature of 50-60°C until the moisture content is below 8%, and finally granulated again through an 80-120 mesh sieve to obtain the final product. Alternatively, each medicinal material is cleaned, dried, and pulverized separately through an 80-120 mesh sieve. They are accurately weighed and mixed according to the prescription ratio. 3-8% of medical starch slurry (such as hydroxypropyl starch slurry) is added as a binder to form a soft mass. This is then granulated through a 20-40 mesh sieve, dried at a low temperature of 50-60°C with ventilation until the moisture content is below 8%, and finally granulated through an 80-120 mesh sieve to obtain granules with good flowability and uniform particle size.

[0026] An embodiment of the present invention provides a method for using the above-mentioned self-heating pack made of traditional Chinese medicine, comprising the following steps: tightening the Velcro, placing the pack on the area to be treated with heat, and dripping or spraying water from the outer protective layer inward until the thermosensitive color-changing fibers of the middle breathable temperature-controlling layer show a color change, indicating that the pack has started to heat up. Optionally, the Velcro closure can be opened, and an appropriate amount of traditional Chinese medicine granules (e.g., 20-50g) can be inserted, and the closure can be tightened to fit the area to be covered. The pack can be placed on the affected area (with the aid of a fixing strap), and an appropriate amount of warm water (approximately 5-15mL) can be sprayed or dripped from the outer layer inward to activate it. When the thermosensitive color-changing area of ​​the middle layer displays the preset treatment temperature color (e.g., 50°C), it can be used normally.

[0027] An embodiment of the present invention provides the application of the above-mentioned self-heating pack of traditional Chinese medicine in the preparation of a local heat therapy product for promoting the recovery of postoperative gastrointestinal function and relieving abdominal pain, wind-cold-dampness syndrome, soreness of the waist and knees or dysmenorrhea.

[0028] An embodiment of the present invention provides a method for preparing the above-mentioned self-heating pack of traditional Chinese medicine, comprising the following steps: S1: Preparation of inner bonding layer: forming micro-convex anti-slip particles by applying adhesive or hot pressing on the inner surface of breathable non-woven fabric; S2: Preparation of the middle breathable and temperature-controlled layer: The porous breathable membrane is combined with the thermosensitive color-changing fiber through weaving, knitting or non-woven processes; S3: Prepare the outer protective layer: Sew the hook and loop fasteners and the fleece tape to the edge of the opening of the waterproof nonwoven fabric; S4: Composite: The inner bonding layer, the middle breathable and temperature-controlled layer, and the outer protective layer are bonded together along the edges using environmentally friendly hot melt adhesive or ultrasonic welding to form a bag-shaped package that is sealed on three sides and open on one side.

[0029] Three layers of material are prepared separately, and then the three layers are bonded together along the edge using environmentally friendly hot melt adhesive (to avoid large-area adhesive application affecting air permeability) or ultrasonic welding process, leaving only one side as the filling opening to form a bag-shaped package.

[0030] One embodiment of the present invention provides a thermotherapy device, comprising the above-mentioned self-heating pack made of traditional Chinese medicine and a fixing strap or patch for fixing the self-heating pack to a part of the human body.

[0031] The following are examples and comparative examples. Example 1 (1) Preparation of granules of traditional Chinese medicine composition: Weigh out 150 parts of dried Amomum tsao-ko, 80 parts of Amomum villosum, 120 parts of Evodia rutaecarpa, and 80 parts of Alpinia oxyphylla. Grind each ingredient separately using a pulverizer and pass them through a 100-mesh sieve. Place the powders in a three-dimensional mixer and mix evenly to obtain a mixed powder. Add 5% (by weight) of hydroxypropyl starch slurry (8wt%) and stir to form a soft mass. Granulate using a 20-mesh sieve. Place the wet granules in a 55℃ hot air circulating oven and dry for 4 hours until the moisture content is approximately 6%. Granulate using a sieve to obtain granules of the traditional Chinese medicine composition with a particle size of 100 mesh.

[0032] (2) Inclusion preparation: (a) Inner bonding layer: 40g / m 2 The pure cotton spunlace nonwoven fabric is coated with a food-grade silicone dispensing machine to form a layer on its inner surface with a height of approximately 0.3 mm and a density of approximately 30 particles / cm. 2 Hemispherical micro-convex particles.

[0033] (b) Middle breathable temperature control layer: Microporous PU film with a pore size of 1-5μm is selected as the substrate and warp-knitted with reversible thermochromic polyester filament (fineness 150D) with a color change point of 50℃ (blue turns white) so that the thermochromic filament is distributed in strips with a spacing of 5mm.

[0034] (c) Outer protective layer: Waterproof polyester non-woven fabric covered with PE film is selected, with a hook and loop fastener about 20cm long sewn on one long edge and a fleece about 25cm long sewn on the other side.

[0035] (d) Composite: The three layers of material are stacked in the order of inner-middle-outer, and hot melt adhesive is used to dot-bond the other three sides except for the Velcro edge (the distance between adhesive dots is 2cm) to make a bag-shaped package with three sealed sides and one open side, with a size of about 15cm×20cm.

[0036] (e) Assembly: Pack about 30g of Chinese herbal composition granules into the package and close the opening with Velcro to obtain a self-heating Chinese herbal pack.

[0037] Example 2 The difference compared to Example 1 is that: 100 parts of Amomum tsao-ko, 100 parts of Amomum villosum, 150 parts of Evodia rutaecarpa, and 50 parts of Alpinia oxyphylla.

[0038] Example 3 The difference compared to Example 1 is that: 200 parts of Amomum tsao-ko, 50 parts of Amomum villosum, 75 parts of Evodia rutaecarpa, and 100 parts of Alpinia oxyphylla.

[0039] Example 4 The difference compared to Example 1 is that: 180 parts of Amomum tsao-ko, 90 parts of Amomum villosum, 140 parts of Evodia rutaecarpa, and 90 parts of Alpinia oxyphylla.

[0040] Example 5 The difference compared to Example 1 is that the particle size of the Chinese medicine composition is 80 mesh due to sieving.

[0041] Example 6 The difference compared to Example 1 is that the particle size of the Chinese medicine composition particles is 120 mesh due to sieving.

[0042] Example 7 The middle breathable and temperature-controlled layer is replaced with: an ePTFE membrane (0.5μm pore size) as the substrate, which is weft-knitted with two types of thermosensitive color-changing fibers with color-changing points of 40℃ (colorless to pink) and 65℃ (colorless to red) to form color block partitions.

[0043] Comparative Example 1 The medicinal materials were weighed according to the formula and proportions of Example 1, and pulverized through a 100-mesh sieve to obtain medicinal powder. The medicinal powder and iron powder were physically mixed evenly at a weight ratio of 1:1.5, and then packaged in a waterproof polyester non-woven fabric covered with a PE film to obtain a heating pack.

[0044] Comparative Example 2 The package consists of only two layers: the inner layer is a non-woven fabric with anti-slip particles, the same as in Example 1, and the outer layer is a waterproof non-woven fabric (with Velcro), the same as in Example 1. The two layers are directly bonded together with hot melt adhesive. The herbal composition granules are the same as in Example 1.

[0045] Comparative Example 3 The difference compared to Example 1 is that the particle size of the Chinese medicine composition particles is 200 mesh due to sieving.

[0046] Comparative Example 4 Compared with Example 1, the difference is that the inner layer is made of pure cotton spunlace nonwoven fabric without micro-protruding particles.

[0047] Comparative Example 5 Compared with Example 1, the difference is that the middle layer is a PU film and there is no reversible thermochromic polyester.

[0048] Test case (1) Heating performance test The sample was laid flat, and thermocouple temperature sensors were embedded at the center and four corners of the surface. Activation was achieved by uniformly spraying 15 mL of 40°C warm water using a quantitative sprayer. The initial heating time to 40°C, the maximum temperature (Tmax), the duration of the temperature stabilization period (40-65°C), and the average temperature over 4 hours were recorded. The uniformity of temperature distribution was observed using an infrared thermal imager. The results are shown in Table 1.

[0049] Table 1

[0050] As shown in Table 1, all embodiments of the present invention exhibit excellent heating performance, including rapid start-up (<4 min), safe peak temperature (<65℃), and long-lasting constant temperature (over 4 h). Comparative Example 1, due to the violent reaction of the chemical heating agent, resulted in a high peak temperature, short duration, and poor safety. Comparative Example 2 lacked a middle temperature control layer, leading to an excessively fast reaction rate, with Tmax approaching the burn threshold. Comparative Example 3, due to its excessively fine particles and poor air permeability, resulted in slow heating start-up and low temperature. Comparative Example 4, due to particle displacement, resulted in uneven local heating. Comparative Example 5 had basically complete functionality but lacked a temperature visualization warning function.

[0051] (2) Test on sustained release and transdermal properties of volatile oils from traditional Chinese medicine (a) In vitro release: Using a Franz diffusion cell, the sample (heated side facing the receiving cell) was fixed between the supply cell and the receiving cell (37℃ PBS + 20% ethanol). Samples were taken at 0.5, 1, 2, 3, and 4 h, and the cumulative release of the representative component (eucalyptol) was determined by HPLC, and release curves were plotted.

[0052] (b) Transdermal assay: Using isolated rat skin, the amount of drug that permeated through the skin was measured over 4 hours using the Franz diffusion cell.

[0053] The results are shown in Table 2.

[0054] Table 2

[0055] As shown in Table 2, Example 1 of the present invention exhibits ideal sustained-release characteristics, with a stable and continuous release over 4 hours. Comparative Example 1, due to high temperature and direct mixing, resulted in a rapid initial release of the drug, which may have been destroyed, leaving no drug available for release later. Comparative Example 2, lacking a temperature-controlled layer, experienced excessively rapid initial release. Comparative Example 3, with its excessively fine particles and clumping, suffered from hindered release. The structural design of the present invention, combined with a suitable particle size, significantly promotes transdermal drug absorption.

[0056] (3) Temperature indication function test During the heating process, observe and record the color change of the middle layer thermosensitive color-changing area, and verify the actual temperature with a thermal imager.

[0057] The thermosensitive color-changing areas in Examples 1 and 7 clearly and reversibly indicate temperature. In Example 1, the strip changes color when the temperature reaches approximately 50°C. Example 7 shows significant color changes at 40°C and 65°C, providing a good temperature range indication and overheat warning. Comparative Example 5 does not have this function.

[0058] (4) Moisture-proof and particle fixation test The sample was placed in an environment with 90% humidity for 2 hours, and the moisture absorption rate was calculated by weighing. Simulating limb movement, the package was swung back and forth and side to side 100 times, and then disassembled to check the particle distribution.

[0059] Example 1: Moisture absorption rate <2%, no particle clumping or significant displacement. Comparative Example 3 (fine powder): Severe moisture absorption (>8%) and clumping. Comparative Example 4: Particles significantly aggregated to one side.

[0060] As can be seen from the above tests, this invention combines an innovative three-layer encapsulation structure design with traditional Chinese medicine granules of specific particle size and formulation, enabling the heating pack to have stable and long-lasting heating, visible and controllable temperature, and enhanced slow-release of traditional Chinese medicine.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0062] For those skilled in the art, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A self-heating pack for traditional Chinese medicine, characterized in that, The product includes a packaging body and granules of a traditional Chinese medicine composition encapsulated within the packaging body. The packaging body comprises, from the inside out, an inner bonding layer, a middle breathable and temperature-controlled layer, and an outer protective layer, which are sequentially laminated. The inner bonding layer is made of breathable non-woven fabric with uniformly distributed micro-convex anti-slip particles on its inner surface. The middle breathable and temperature-controlled layer is composed of a porous breathable membrane and thermosensitive color-changing fibers. The outer protective layer is made of waterproof non-woven fabric with an adjustable Velcro closure at its edges. The granules of the traditional Chinese medicine composition are made from the following raw materials in parts by weight: 100-200 parts of Amomum tsao-ko, 50-100 parts of Amomum villosum, 75-150 parts of Evodia rutaecarpa, and 50-100 parts of Alpinia oxyphylla, and the particle size of the granules is 80-120 mesh.

2. The self-heating herbal pack as described in claim 1, characterized in that, The porous breathable membrane is a microporous polyurethane membrane or an expanded polytetrafluoroethylene membrane with a pore size of 0.1-10μm; the thermosensitive color-changing fiber is a fiber made by blending reversible thermochromic material with a polymer substrate and spinning, with a color-changing temperature of at least one of 40℃, 50℃, and 65℃.

3. The self-heating herbal pack as described in claim 2, characterized in that, In the middle breathable and temperature-controlled layer, the porous breathable membrane and the thermosensitive color-changing fiber are interwoven and combined in a woven, knitted or non-woven manner, and the thermosensitive color-changing fiber is distributed in a grid pattern.

4. The self-heating herbal pack as described in claim 1, characterized in that, The micro-protruding anti-slip particles on the inner bonding layer are made of food-grade silicone or thermoplastic polyurethane material, and are fixed to the surface of the breathable non-woven fabric by dispensing or hot pressing. The particle height is 0.2-0.5 mm, and the distribution density is 20-50 particles / cm². 2 .

5. The self-heating herbal pack as described in claim 1, characterized in that, The Velcro closure structure includes a hook-and-loop band on one side of the opening edge of the outer protective layer and a fleece band on the other side. The fleece band is longer than the hook-and-loop band to allow for stepless adjustment of the tightness of the wrap.

6. The self-heating herbal pack according to any one of claims 1-5, characterized in that, The traditional Chinese medicine composition granules are prepared by the following method: Amomum tsao-ko, Amomum villosum, Evodia rutaecarpa, and Alpinia oxyphylla are dried, pulverized, and passed through an 80-120 mesh sieve. They are then mixed evenly in a specific ratio to obtain a mixed powder. 3-8% by weight of medical starch paste is added as a binder to form a soft material. This material is then granulated through a 20-40 mesh sieve, dried at a low temperature of 50-60℃ until the moisture content is below 8%, and then granulated again through an 80-120 mesh sieve to obtain the final product.

7. A method of using a self-heating herbal pack as described in any one of claims 1-6, characterized in that, Includes the following steps: Tighten the Velcro straps, place the bag on the area to be heated, and drip or spray water from the outer protective layer inwards until the heat-sensitive color-changing fibers of the middle breathable temperature-controlling layer show a color change, indicating that it has started to heat up.

8. The use of the traditional Chinese medicine self-heating pack as described in any one of claims 1-6 in the preparation of a local heat therapy product for promoting postoperative gastrointestinal function recovery and relieving abdominal pain, wind-cold-dampness syndrome, soreness of the waist and knees, or dysmenorrhea.

9. A method for preparing a self-heating pack of traditional Chinese medicine as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Preparation of inner bonding layer: forming micro-convex anti-slip particles by applying adhesive or hot pressing on the inner surface of breathable non-woven fabric; S2: Preparation of the middle breathable and temperature-controlled layer: The porous breathable membrane is combined with the thermosensitive color-changing fiber through weaving, knitting or non-woven processes; S3: Prepare the outer protective layer: Sew the hook and loop fasteners and the fleece tape to the edge of the opening of the waterproof nonwoven fabric; S4: Composite: The inner bonding layer, the middle breathable and temperature-controlled layer, and the outer protective layer are bonded together along the edges using environmentally friendly hot melt adhesive or ultrasonic welding to form a bag-shaped package that is sealed on three sides and open on one side.

10. A thermotherapy device, characterized in that, It includes a traditional Chinese medicine self-heating pack as described in any one of claims 1-6, and a fixing strap or dressing for fixing the self-heating pack to a part of the human body.

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