Artemisia argyi charcoal hot patch prepared by adopting low-temperature slow baking process

Abstract

The invention provides a mugwort charcoal hot patch prepared by adopting a low-temperature slow baking process, and relates to the technical field of heating physiotherapy products. The mugwort charcoal hot patch prepared through the low-temperature slow baking process comprises a breathable inner layer, a mugwort charcoal functional layer, a heating layer and a protective outer layer, the breathable inner layer is made of full-bio-based degradable non-woven fabric, the mugwort charcoal functional layer is close to the breathable inner layer, the core component is mugwort charcoal subjected to composite modification treatment through the low-temperature slow baking process, and the protective outer layer is made of non-woven fabric. The mugwort charcoal functional layer can continuously and stably release active ingredients under the heat action of the heating layer. The mugwort charcoal is prepared by combining a low-temperature slow baking process with composite modification treatment, active ingredients in mugwort can be fully reserved, the mugwort charcoal and the mugwort leaf extract are synergistic at a heating temperature, trace ingredients with soothing, blood activating and aromatic effects can be continuously and stably released, far infrared rays radiated by the infrared emission ceramic powder are combined with thermal therapy, and the health care effect is achieved. And the physiotherapy effect is obviously improved.

Description

Artemisia argyi charcoal heat patch prepared using a low-temperature slow-baking process Technical Field

[0001] This invention relates to the field of fever therapy products, specifically to a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. Background Technology

[0002] Heating patches are a common portable heating product. Their core principle is to release heat through the oxidation reaction of iron powder, achieving a physical heating function. Artemisia is a traditional medicinal plant whose stems and leaves contain various active ingredients, such as volatile oils and flavonoids, which have soothing, blood-activating, and cold-dispelling pharmacological effects. Combining artemisia with heating patches to achieve a synergistic effect of heat therapy and medicinal efficacy is an important development direction for heating patch products. While some heating patches containing artemisia have already appeared in existing technology, some shortcomings remain. Current products often directly add crushed artemisia to the heating patch or use conventional high-temperature carbonization processes to prepare artemisia charcoal, resulting in a significant loss of active ingredients and failing to fully realize its pharmacological and health-promoting effects. Furthermore, they lack environmental and safety performance; existing heating patches often use non-degradable materials, easily causing environmental pollution after use. Additionally, the oxidation process of iron powder may produce trace amounts of irritating gases, easily triggering skin allergies.

[0003] Therefore, this invention proposes an artemisia charcoal heat patch that can fully retain the active ingredients of artemisia, has excellent heating performance, significant therapeutic effect, and is environmentally friendly and low in allergens, and has important market value and application prospects. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. This heat patch, through its unique preparation process, composite formula, and structural design, solves the aforementioned problems of traditional heat patches, achieving a qualitative leap from physical heating to functional therapy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mugwort charcoal heat patch prepared using a low-temperature slow-baking process, comprising a breathable inner layer, a mugwort charcoal functional layer, a heating layer, and a protective outer layer. The breathable inner layer is made of a fully bio-based biodegradable non-woven fabric. The mugwort charcoal functional layer is attached close to the breathable inner layer, and its core component is mugwort charcoal that has undergone a low-temperature slow-baking process combined with composite modification. Under the heat of the heating layer, the mugwort charcoal functional layer can continuously and stably release active ingredients, and simultaneously radiate far-infrared rays through infrared-emitting ceramic powder, achieving a synergistic effect of medicinal efficacy, heat therapy, and far-infrared physiotherapy. Simultaneously, the heating layer, located outside the Artemisia argyi charcoal functional layer, provides continuous and stable heat for the heat patch. It is made of iron powder, activated carbon, vermiculite, sodium chloride, and water mixed in a specific ratio. The heating layer and the Artemisia argyi charcoal functional layer work synergistically to achieve a synergistic effect of drug release and heat therapy. The protective outer layer uses a PET composite film to prevent external moisture from entering the heating layer and affecting the heating effect. The breathable inner layer is fixed to the Artemisia argyi charcoal functional layer by hot melt adhesive. The Artemisia argyi charcoal functional layer and the heating layer are separated by an insulating mesh. The heating layer and the protective outer layer are sealed together by a heat-sealing process.

[0006] Further, the preparation process of the Artemisia argyi charcoal functional layer includes the following steps: Step 1: Raw material pretreatment; Select fresh Artemisia argyi stems, remove impurities, clean them, cut them into 3-5cm segments, and dry them in a drying oven at 60-80℃ until the moisture content is less than 10%; Step 2: Low-temperature slow roasting carbonization; Place the dried Artemisia argyi stem segments into a carbonization furnace, first heat them to 150-200℃ at a heating rate of 5℃ / min, hold for 3 hours for pre-carbonization, then heat them to 300-400℃ at a heating rate of 2℃ / min, hold for 4 hours for low-temperature slow roasting carbonization, and finally cool them naturally to room temperature to obtain primary Artemisia argyi charcoal; Step 3: Composite modification; Crush the primary Artemisia argyi charcoal to 300 mesh, add 10% potassium carbonate reagent by weight of Artemisia argyi charcoal, mix evenly, and place in an activation furnace at 350- The modified Artemisia argyi charcoal was obtained by activating it at 400℃ for 3 hours, then adding vermiculite salt, a mineral catalyst accounting for 5% of the mass of the Artemisia argyi charcoal, stirring it evenly, and drying it at 120-150℃ for 60 minutes.

[0007] Furthermore, the formula of the Artemisia argyi charcoal functional layer, by mass parts, is 60 parts modified Artemisia argyi charcoal, 20 parts infrared emitting ceramic powder, 15 parts tourmaline powder, 10 parts Artemisia argyi extract, 5 parts hydroxypropyl methylcellulose, 4 parts glycerin, and 8 parts deionized water.

[0008] Furthermore, the preparation method of the Artemisia argyi extract is as follows: pulverize dried Artemisia argyi to 100-150 mesh, add 10 times the mass of 70%-80% ethanol solution, reflux extract at 65°C 3 times, 1 hour each time, combine the extracts, and concentrate under reduced pressure to an extract with a relative density of 1.1-1.2 to obtain the Artemisia argyi extract.

[0009] Furthermore, the heating layer is formulated by weight as follows: 80 parts reduced iron powder, 15 parts medical activated carbon, 10 parts vermiculite, 6 parts sodium chloride, 5 parts water-absorbing resin, and 15 parts deionized water.

[0010] Furthermore, the breathable inner layer is made of fully bio-based biodegradable nonwoven fabric with an air permeability of 1200 mm / s, and the protective outer layer has a PET thickness of more than 20 μm and has waterproof and breathable properties.

[0011] Furthermore, the breathable inner layer and the Artemisia argyi charcoal functional layer are fixed together by hot melt adhesive, an insulating mesh is provided between the Artemisia argyi charcoal functional layer and the heating layer, and the heating layer and the protective outer layer are sealed together by heat sealing process.

[0012] Furthermore, the preparation process of this Artemisia argyi charcoal heat patch includes the following steps: Step 1: Artemisia argyi charcoal preparation; modified Artemisia argyi charcoal is prepared according to the steps described in claim 2; Step 2: Artemisia argyi charcoal functional layer preparation; according to the Artemisia argyi charcoal functional layer formula, modified Artemisia argyi charcoal, infrared emitting ceramic powder, and tourmaline powder are mixed evenly, and Artemisia argyi extract, hydroxypropyl methylcellulose, glycerin, and deionized water are added. The mixture is stirred until a uniform paste is formed, with a stirring speed of 400 r / min and a stirring time of 30 min. This paste is then coated onto one side of the breathable inner layer, with a coating thickness controlled at 1.0 - 1.5 mm. After drying, the thickness is 0.8 - 1.2 mm. Dry at ℃ for 2 hours, and after cooling, obtain a composite layer of Artemisia argyi charcoal functional layer and breathable inner layer; Step 3: Preparation of heating layer; According to the heating layer formula, reduced iron powder, medical activated carbon, vermiculite, and sodium chloride are mixed evenly at a stirring speed of 300 r / min for 15 min. Add water-absorbing resin and deionized water, and continue stirring until all components are fully mixed and form loose granular material at a stirring speed of 200 r / min for 20 min, which is the heating layer material; Step 4: Composite assembly; Lay an isolation mesh on the side of the Artemisia argyi charcoal functional layer away from the breathable inner layer, and evenly spread the heating layer material on the isolation mesh with a thickness of 2.0 mm. Compact it with a pressure roller at a pressure of 0.3 MPa. Then cover the heating layer with the protective outer layer and seal the four sides through a heat sealing process to obtain the Artemisia argyi charcoal heat patch semi-finished product. The heat sealing process temperature is 140℃, the heat sealing pressure is maintained at 0.5 MPa, and the heat sealing time is 2 - 3s; Step 5: Finished product processing; Cut the semi-finished product according to the preset size, and then conduct quality inspection, including indicators such as appearance, size, heating performance, and breathability. After passing the inspection, vacuum packaging is used, and the packaging material is PET composite film. After packaging, it becomes the finished product Artemisia argyi charcoal heat patch.

[0013] This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. It has the following beneficial effects: 1. This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. The mugwort charcoal is prepared using a combination of low-temperature slow-baking and composite modification treatment, which can fully retain the active ingredients in mugwort. At the heating temperature, the mugwort charcoal and mugwort leaf extract work synergistically to continuously and stably release trace components with soothing, blood-activating, and aromatic effects. Furthermore, the far-infrared radiation from the infrared-emitting ceramic powder, combined with heat therapy, significantly enhances the therapeutic effect.

[0014] 2. This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. The structure and function of this mugwort charcoal heat patch, which combines mugwort charcoal with heat application and far-infrared physiotherapy, have significant effects in relieving muscle soreness, improving local blood circulation, and promoting relaxation. Through the composite modification treatment of mugwort charcoal, the moisture adsorption and slow-release performance and oxidation reaction catalytic effect of the heating system are optimized. The preheating time is relatively long, the heating rate is stable and gentle, the temperature is controlled at a comfortable physiotherapy temperature, the heating duration is long, the heating curve is stable, and there are no obvious fluctuations in temperature rise or fall, resulting in a good user experience.

[0015] 3. This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process, which has the advantages of being environmentally friendly and low-allergenic. The breathable inner layer is made of fully bio-based biodegradable non-woven fabric, and the mugwort charcoal is a natural plant charcoal. Combined with other environmentally friendly ingredients, the heat patch can be naturally degraded after use, making it environmentally friendly. The multi-layer composite structure places the mugwort charcoal functional layer on the side close to the skin and the heating layer on the outside, achieving a unique heat sensation of filtering heat first and then transferring heat. This ensures both gentle heat transfer and facilitates the penetration of active ingredients. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Embodiment 1:

[0017] This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process, comprising a breathable inner layer, a mugwort charcoal functional layer, a heating layer, and a protective outer layer. The breathable inner layer is made of a fully biodegradable non-woven fabric. The mugwort charcoal functional layer is attached close to the breathable inner layer, and its core component is mugwort charcoal treated with a low-temperature slow-baking process combined with composite modification. Under the heat of the heating layer, the mugwort charcoal functional layer can continuously and stably release active ingredients, and simultaneously radiates far-infrared rays through infrared-emitting ceramic powder, achieving a synergistic effect of medicinal efficacy, heat therapy, and far-infrared physiotherapy. The heating layer, located outside the Artemisia argyi charcoal functional layer, provides continuous and stable heat to the heat patch. It is made from a mixture of iron powder, activated carbon, vermiculite, sodium chloride, and water in a specific ratio. The heating layer works synergistically with the Artemisia argyi charcoal functional layer to achieve a synergistic effect of drug release and heat therapy. The protective outer layer uses a PET composite film to prevent external moisture from entering the heating layer and affecting the heating effect. The breathable inner layer is fixed to the Artemisia argyi charcoal functional layer with hot melt adhesive. The Artemisia argyi charcoal functional layer and the heating layer are separated by an insulating mesh. The heating layer and the protective outer layer are sealed together using a heat-sealing process. Example 2:

[0018] This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. The preparation process of the mugwort charcoal functional layer includes the following steps: Step 1: Raw material pretreatment; Select fresh mugwort stems, remove impurities, clean them, cut them into 3-5cm segments, and dry them in a drying oven at 60-80℃ until the moisture content is less than 10%; Step 2: Low-temperature slow-baking carbonization; Place the dried mugwort stem segments into a carbonization furnace, first heat them to 150-200℃ at a heating rate of 5℃ / min, hold for 3 hours for pre-carbonization, then heat them to 300-400℃ at a heating rate of 2℃ / min, hold for 4 hours for low-temperature slow-baking carbonization, and finally cool them naturally to room temperature to obtain primary mugwort charcoal; Step 3: Composite modification; Crush the primary mugwort charcoal to 300 mesh, add 10% potassium carbonate reagent by weight of the mugwort charcoal, mix evenly, and place in an activation furnace at 350- Activation was performed at 400℃ for 3 hours, followed by the addition of vermiculite salt (5% by weight of the Artemisia argyi charcoal), and stirring until homogeneous. The mixture was then dried at 120-150℃ for 60 minutes to obtain modified Artemisia argyi charcoal. The functional layer of the Artemisia argyi charcoal consisted of 60 parts modified Artemisia argyi charcoal, 20 parts infrared emitting ceramic powder, 15 parts tourmaline powder, 10 parts Artemisia argyi extract, 5 parts hydroxypropyl methylcellulose, 4 parts glycerol, and 8 parts deionized water. The Artemisia argyi extract was prepared by pulverizing dried Artemisia argyi leaves to 100-150 mesh, adding 10 times its weight of 70%-80% ethanol solution, and refluxing at 65℃ for 1 hour each time. The extracts were combined and concentrated under reduced pressure to a relative density of 1.1- The extract of 1.2 yields Artemisia argyi extract. The heating layer formula, by weight, consists of 80 parts reduced iron powder, 15 parts medical activated carbon, 10 parts vermiculite, 6 parts sodium chloride, 5 parts water-absorbing resin, and 15 parts deionized water. The breathable inner layer is made of fully bio-based biodegradable non-woven fabric with an air permeability of 1200 mm / s. The protective outer layer has a PET thickness greater than 20 μm and is waterproof and breathable. The breathable inner layer and the Artemisia argyi charcoal functional layer are fixed together by hot melt adhesive. An insulating mesh is placed between the Artemisia argyi charcoal functional layer and the heating layer. The heating layer and the protective outer layer are sealed together by a heat-sealing process. Example 3:

[0019] This invention provides a mugwort charcoal heat patch prepared using a low-temperature slow-baking process. The preparation process of the mugwort charcoal heat patch includes the following steps: Step 1: Preparation of mugwort charcoal; Prepare modified mugwort charcoal according to the steps described in claim 2; Step 2: Preparation of the mugwort charcoal functional layer; According to the mugwort charcoal functional layer formula, mix the modified mugwort charcoal, infrared emitting ceramic powder, and tourmaline powder evenly, add mugwort extract, hydroxypropyl methylcellulose, glycerin, and deionized water, and stir until a uniform paste is formed. The stirring speed is 400 r / min, and the stirring time is 30 min. Coat it on one side of the breathable inner layer, with the coating thickness controlled at 1.0-1.5 mm. After drying, the thickness is 0.8-1.2 mm. Dry at ℃ for 2 hours, and after cooling, obtain a composite layer of Artemisia argyi charcoal functional layer and breathable inner layer; Step 3: Preparation of heating layer; According to the heating layer formula, reduced iron powder, medical activated carbon, vermiculite, and sodium chloride are mixed evenly at a stirring speed of 300 r / min for 15 min. Add water-absorbing resin and deionized water, and continue stirring until all components are fully mixed and form loose granular material at a stirring speed of 200 r / min for 20 min, which is the heating layer material; Step 4: Composite assembly; Lay an isolation mesh on the side of the Artemisia argyi charcoal functional layer away from the breathable inner layer, and evenly spread the heating layer material on the isolation mesh with a thickness of 2.0 mm. Compact it with a pressure roller at a pressure of 0.3 MPa. Then cover the heating layer with the protective outer layer and seal the four sides through a heat sealing process to obtain the Artemisia argyi charcoal heat patch semi-finished product. The heat sealing process temperature is 140℃, the heat sealing pressure is maintained at 0.5 MPa, and the heat sealing time is 2 - 3s; Step 5: Finished product processing; Cut the semi-finished product according to the preset size, and then conduct quality inspection, including indicators such as appearance, size, heating performance, and breathability. After passing the inspection, vacuum packaging is used, and the packaging material is PET composite film. After packaging, it becomes the finished product Artemisia argyi charcoal heat patch.

[0020] Performance Testing: The Artemisia argyi charcoal heat patches prepared in Examples 1-3 above were compared with commercially available ordinary heat patches and commercially available heat patches containing Artemisia argyi. The test results are shown in the table below: The effectiveness of relieving muscle soreness was evaluated through volunteer trial, with 50 people in each group. The relief of muscle soreness was evaluated after use. The skin sensitization rate was assessed through skin irritation test, with 100 people in each group. Skin reactions were observed after 3 consecutive days of use. The test results show that the Artemisia argyi charcoal heat patches prepared in the embodiments of the present invention are significantly superior to commercially available products in terms of heating time, duration of continuous heating, duration of release of active ingredients, effectiveness of relieving muscle soreness, and skin sensitization rate, demonstrating the technical advantages and innovative value of the present invention.

[0021] The following points should be noted in this document: Where there is no conflict, the embodiments and features in the embodiments of this disclosure can be combined with each other to obtain new embodiments.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A mugwort charcoal heat patch prepared using a low-temperature slow-baking process, comprising a breathable inner layer, a mugwort charcoal functional layer, a heating layer, and a protective outer layer, characterized in that: The breathable inner layer is made of fully biodegradable non-woven fabric. The Artemisia argyi charcoal functional layer is close to the breathable inner layer. Its core component is Artemisia argyi charcoal that has undergone low-temperature slow baking combined with composite modification. Under the heat of the heating layer, the Artemisia argyi charcoal functional layer can continuously and stably release active ingredients. At the same time, it radiates far-infrared rays through infrared emitting ceramic powder, realizing the synergistic effect of medicine, heat therapy, and far-infrared physiotherapy. The heating layer is located outside the Artemisia argyi charcoal functional layer, providing continuous and stable heat for the heat patch. It is made of iron powder, activated carbon, vermiculite, sodium chloride, and water mixed in proportion. The heating layer and the Artemisia argyi charcoal functional layer work together to achieve a synergistic effect of medicine release and heat therapy. The protective outer layer is made of PET composite film to prevent external moisture from entering the heating layer and affecting the heating effect. The breathable inner layer and the Artemisia argyi charcoal functional layer are fixed together by hot melt adhesive. The Artemisia argyi charcoal functional layer and the heating layer are separated by an isolation mesh. The heating layer and the protective outer layer are sealed together by a heat sealing process.

2. The Artemisia argyi charcoal heat patch prepared by a low-temperature slow-baking process according to claim 1, characterized in that: The preparation process of the Artemisia argyi charcoal functional layer includes the following steps: Step 1: Raw material pretreatment; Select fresh Artemisia argyi stems, remove impurities, clean them, cut them into 3-5cm segments, and dry them in a drying oven at 60-80℃ until the moisture content is less than 10%; Step 2: Low-temperature slow roasting carbonization; Place the dried Artemisia argyi stem segments into a carbonization furnace, first heat them to 150-200℃ at a heating rate of 5℃ / min, hold for 3 hours for pre-carbonization, then heat them to 300-400℃ at a heating rate of 2℃ / min, hold for 4 hours for low-temperature slow roasting carbonization, and finally cool them naturally to room temperature to obtain primary Artemisia argyi charcoal; Step 3: Composite modification; Crush the primary Artemisia argyi charcoal to 300 mesh, add 10% potassium carbonate reagent by weight of Artemisia argyi charcoal, mix evenly, place in an activation furnace, activate at 350-400℃ for 3 hours, then add 5% mineral catalyst vermiculite salt by weight of Artemisia argyi charcoal, stir evenly, and activate at 120℃. - Dry at 150℃ for 60 min to obtain modified Artemisia argyi charcoal.

3. The Artemisia argyi charcoal heat patch prepared by a low-temperature slow-baking process according to claim 1, characterized in that: The formula of the Artemisia argyi charcoal functional layer, by mass parts, is 60 parts modified Artemisia argyi charcoal, 20 parts infrared emitting ceramic powder, 15 parts tourmaline powder, 10 parts Artemisia argyi extract, 5 parts hydroxypropyl methylcellulose, 4 parts glycerin, and 8 parts deionized water.

4. The mugwort charcoal heat patch prepared by a low-temperature slow-baking process according to claim 3, characterized in that: The preparation method of the Artemisia argyi extract is as follows: dry Artemisia argyi leaves are pulverized to 100-150 mesh, 10 times the mass of 70%-80% ethanol solution is added, and the mixture is refluxed at 65°C for 3 times, 1 hour each time. The extracts are combined and concentrated under reduced pressure to a paste with a relative density of 1.1-1.2 to obtain the Artemisia argyi extract.

5. The Artemisia argyi charcoal heat patch prepared by a low-temperature slow-baking process according to claim 1, characterized in that: The heating layer is formulated by weight as follows: 80 parts reduced iron powder, 15 parts medical activated carbon, 10 parts vermiculite, 6 parts sodium chloride, 5 parts water-absorbing resin, and 15 parts deionized water.

6. The Artemisia argyi charcoal heat patch prepared by a low-temperature slow-baking process according to claim 1, characterized in that: The breathable inner layer is made of fully bio-based biodegradable nonwoven fabric with an air permeability of 1200 mm / s, and the protective outer layer is PET with a thickness of more than 20 μm, which has waterproof and breathable properties.

7. The Artemisia argyi charcoal heat patch prepared by a low-temperature slow-baking process according to claim 1, characterized in that: The breathable inner layer and the Artemisia argyi charcoal functional layer are fixed together by hot melt adhesive. An isolation mesh is provided between the Artemisia argyi charcoal functional layer and the heating layer. The heating layer and the protective outer layer are sealed together by heat sealing process.

8. A mugwort charcoal heat patch prepared using a low-temperature slow-baking process according to any one of claims 1-7, characterized in that: The preparation process of this Artemisia argyi charcoal heat patch includes the following steps: Step 1: Artemisia argyi charcoal preparation; modified Artemisia argyi charcoal is prepared according to the steps described in claim 2; Step 2: Artemisia argyi charcoal functional layer preparation; according to the Artemisia argyi charcoal functional layer formula, the modified Artemisia argyi charcoal, infrared emitting ceramic powder, and tourmaline powder are mixed evenly, and Artemisia argyi extract, hydroxypropyl methylcellulose, glycerin, and deionized water are added. The mixture is stirred until a uniform paste is formed at a stirring speed of 400 r / min for 30 min. This paste is then coated onto one side of the breathable inner layer, with a coating thickness controlled at 1.0 - 1.5 mm. After drying, the thickness is 0.8 - 1.2 mm. Dry at ℃ for 2 hours, and after cooling, obtain a composite layer of Artemisia argyi charcoal functional layer and breathable inner layer; Step 3: Preparation of heating layer; According to the heating layer formula, reduced iron powder, medical activated carbon, vermiculite, and sodium chloride are mixed evenly at a stirring speed of 300 r / min for 15 min. Add water-absorbing resin and deionized water, and continue stirring until all components are fully mixed and form loose granular material at a stirring speed of 200 r / min for 20 min, which is the heating layer material; Step 4: Composite assembly; Lay an isolation mesh on the side of the Artemisia argyi charcoal functional layer away from the breathable inner layer, and evenly spread the heating layer material on the isolation mesh with a thickness of 2.0 mm. Compact it with a pressure roller at a pressure of 0.3 MPa. Then cover the heating layer with the protective outer layer and seal the four sides through a heat sealing process to obtain the Artemisia argyi charcoal heat patch semi-finished product. The heat sealing process temperature is 140℃, the heat sealing pressure is maintained at 0.5 MPa, and the heat sealing time is 2 - 3s; Step 5: Finished product processing; Cut the semi-finished product according to the preset size, and then conduct quality inspection, including indicators such as appearance, size, heating performance, and breathability. After passing the inspection, vacuum packaging is used, and the packaging material is PET composite film. After packaging, it becomes the finished product Artemisia argyi charcoal heat patch.