Treatment and wrapping method of moxa stick plant charcoal powder coating

Abstract

The invention discloses a treatment and wrapping method for a moxa stick plant charcoal powder coating, belongs to the technical field of moxibustion products, and solves the problems that an existing moxa stick carbon powder coating is dry and brittle, a wrapping layer and moxa are not tightly attached, the yield is low, and gaps are generated during combustion to generate fine smoke. The core is that plant charcoal powder and an adhesive are mixed, water is added, the mixture is stirred into a coating solution, moxa stick paper is coated and dried to be in a semi-dry state, the paper is shaped, no water stain exists on the surface, the touch feeling is wet and soft, the adhesive is not completely cured, then moxa is wrapped to make a blank, and finally the finished product is obtained through drying. The state coating is flexible and sticky, the roll is not prone to cracking and is tightly attached to moxa, interface gaps are eliminated, it is guaranteed that moxa sticks are fully and stably carbonized and combusted in a smokeless mode, and the smoke purifying effect and the product yield are improved. According to the alternative scheme, the moxa column is manufactured firstly, then the coating is sprayed, and wrapping is conducted after coating paper is completely dried and regains moisture.

Description

Technical Field

[0001] This invention relates to the field of moxa stick products used in traditional Chinese medicine moxibustion, and in particular to a method for treating the charcoal powder coating of moxa sticks and its application in moxa stick wrapping, which aims to improve the smokeless combustion performance and stability of moxa sticks. Background Technology

[0002] In moxibustion therapy, to reduce the smoke produced by burning moxa wool, moxa stick paper coated with plant charcoal powder is used on the outer layer of the moxa stick. This can control and purify the smoke, as the charcoal powder can aid combustion and purify the smoke under high exothermic conditions. For example, the authorized patent number CN202421801025.7 describes a smoke-controlling paper for rolling moxa sticks, which states that "in specific implementation, carbon powder formed by carbonizing ordinary aged moxa leaves is mixed with plant starch binder to form a liquid coating. Combined with the drying and flattening processes in papermaking, the coating equipment is used to spray the moxa stick paper; alternatively, ordinary moxa stick paper can be sprayed separately, then dried, flattened, and cut into finished smoke-controlling paper for rolling moxa sticks, with the coated surface wrapped inside the moxa stick. This type of moxa stick achieves the same smoke-controlling effect as existing straight-tube smoke-controlling technology during moxibustion." However, existing technologies have certain drawbacks: after the charcoal coating is completely dried, its flexibility decreases sharply, becoming hard, brittle, and prone to cracking. When using this dried charcoal paper for wrapping, the brittle coating is prone to micro-cracks or even peeling under stress, affecting the adhesion of each wrapping layer. Simultaneously, the hard, dried coating cannot adhere tightly to the soft moxa wool inside, creating microscopic gaps between the coating and the moxa wool after wrapping. During combustion, external air enters the moxa stick unevenly and excessively through these gaps, preventing the surface moxa wool from undergoing sufficient smokeless combustion (i.e., carbonization) in an effective low-oxygen, charcoal-rich environment. Instead, incomplete combustion occurs due to excessive oxygen, easily producing visible "fine smoke," affecting the smoke-free effect and user experience. Furthermore, the brittleness of the coating also reduces the yield and production efficiency of the wrapping process. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a semi-wet wrapping method for treating the plant charcoal powder coating of moxa sticks. This method effectively solves the technical problems of coating brittleness and poor bonding with moxa wool by controlling the drying state of the coating during wrapping, thereby achieving stable and complete smokeless combustion of the moxa sticks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a method for processing and rolling a moxa stick with a plant charcoal powder coating (hereinafter referred to as charcoal powder coating), the core of which is: performing the moxa stick rolling operation when the charcoal powder coating is in a "semi-dry state". The "semi-dry state" is defined as follows: after the moxa stick paper coated with the charcoal powder coating liquid has undergone preliminary drying, the paper itself has basically taken shape, no obvious water stains are visible on the coating surface, but it still feels moist and soft to the touch, and the adhesive within the coating has not yet fully cured and cross-linked. In this state, the coating possesses both a certain structural strength and good plastic deformation capacity.

[0005] The beneficial effects of this invention are as follows: 1. Completely solves the problem of coating cracking during roll wrapping: The semi-dry coating has low internal stress and good flexibility, allowing it to undergo plastic deformation rather than brittle cracking under rolling pressure. During the subsequent final drying process, the coating shrinks synchronously with the moxa stick paper, avoiding stress cracking caused by uneven shrinkage and effectively increasing the adhesion of each roll layer. This also makes it possible to apply thicker charcoal powder coatings, increasing the suitable thickness from the conventional 0.15-0.3mm to 2mm, providing a technological basis for designing moxa stick products with different smoke purification requirements.

[0006] 2. Achieving a tight microscopic bond between the charcoal layer and the moxa wool: The semi-dry coating possesses a certain degree of stickiness and softness, allowing it to embed and adhere to the surface moxa wool under rolling pressure, eliminating or significantly reducing gaps at the "coating-moxa wool" interface. This ensures that during combustion, the surface layer of moxa wool adheres tightly to the highly exothermic charcoal powder layer and carbonizes and burns in a controlled environment with a balanced reduction in oxygen supply. This fundamentally suppresses incomplete combustion and the generation of "fine smoke" caused by gaps, significantly improving smoke purification efficiency and combustion stability.

[0007] 3. Improved process adaptability and production efficiency: This method is applicable not only to brand-new coating production lines (coating and rolling immediately), but also to the rolling and packaging of completely dried charcoal powder moxa sticks after rehydration treatment, demonstrating strong process compatibility. Because the brittleness problem is solved, the scrap rate during the rolling and packaging process is extremely low, resulting in improved production efficiency. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the basic process flow of Embodiment 1 of the present invention.

[0009] Figure 2 is a schematic diagram comparing the cross-sections of the moxa stick wrapping layers obtained by the prior art (dry wrapping) and the present invention (semi-wet wrapping), namely, the cross-sectional structures of the dry wrapping layer 21 and the semi-wet wrapping layer 22. Detailed Implementation

[0010] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0011] Example 1: Direct semi-wet wrapping method This embodiment provides a direct semi-wet rolling and packaging method: 1. Preparation of coating solution: Take fine plant charcoal powder (such as mugwort charcoal powder) and plant starch binder (such as sodium plant cellulose) and mix them in a mass ratio of 10:0.5 to 10:1. Add water and stir evenly to prepare a charcoal powder coating solution with suitable viscosity.

[0012] 2. Coating and Pre-drying: Using a scraper or roller coating machine, the coating liquid is evenly applied to the pre-coated moxa stick paper. (Pre-coated moxa stick paper refers to a 40 cm long section of paper coated for a 28 mm diameter moxa stick roll, with a 9 cm section left uncoated for the final layer on the surface of the rolled moxa stick, ensuring a clean surface for the finished moxa stick without charcoal powder.) The wet film thickness is controlled to be approximately 0.4 mm (corresponding to a dry film thickness of approximately 0.25 mm). The paper is then placed in a drying tunnel and dried in hot air at 40-60℃ for approximately 15-30 minutes. By observation and touch, the paper is considered "semi-dry" when it is set, the coating surface is dry but slightly damp to the touch, soft, and not sticky.

[0013] 3. Rolling: Immediately place the pre-weighed moxa wool onto the semi-dry charcoal-coated paper, and roll it using an automatic rolling machine or manual rolling equipment to form a dense moxa stick blank. At this time, the soft coating adheres tightly to the moxa wool under pressure, and the layers of coating paper also adhere tightly to each other.

[0014] 4. Final Drying and Post-treatment: Place the rolled moxa stick blank in a ventilated area or a low-temperature drying room for final drying, ensuring complete evaporation of moisture from the coating and moxa wool, and thorough curing of the adhesive. Optionally, immerse both ends of the moxa stick in the charcoal powder coating liquid on a flat plate and press and rub repeatedly to ensure the coating liquid is stably applied to the moxa wool without causing individual moxa wool flakes to fall off. Afterward, remove and dry to enhance the smoke control and purification effect of the end face.

[0015] Example 2: Pre-made moxa wool column method This embodiment provides an alternative method of pre-forming followed by coating, suitable for manufacturing moxa cones of specific shapes (such as tall cylindrical shapes): 1. Pre-made moxa cones: Moxa wool is filled into a special mold and pressed into shape, or it is formed into a moxa cone after conventional rolling. At the same time, a very thin layer of pure cotton yarn (pure cotton silk cover) can be placed on the outside in advance, and then the mold or rolling device is used to initially roll it tight to form a sturdy moxa cone.

[0016] 2. Surface spraying and semi-drying: Use a spray gun to evenly spray the charcoal powder coating liquid onto the surface of the moxa stick according to the designed thickness. Then place it in an environment of about 50℃ and bake for 15-30 minutes to make the surface coating reach a semi-dry state (moist and soft to the touch).

[0017] 3. Moxa Stick Paper Wrapping: Using ordinary moxa stick paper, the semi-dry moxa wool stick is rolled up and then dried completely. This method also achieves a tight, seamless bond between the charcoal powder coating and the moxa wool.

[0018] Example 3: Moisture Removal Treatment by Rolling Method This embodiment addresses the reprocessing of charcoal-coated moxa stick paper that has been mass-produced and fully dried using conventional processes. For stocked charcoal-coated moxa stick paper with a fully dried coating thickness of 0.15-0.3 mm (this thickness is suitable for storage), before rolling, a small amount of water mist is evenly sprayed onto the charcoal coating surface using a fine mist sprayer. The paper is left to stand for 3-5 minutes, allowing the moisture to evenly penetrate the coating and rehydrate it, restoring it to a semi-dry state of flexibility. Then, the conventional moxa wool filling and rolling operations are performed. This method expands the applicability of this process.

[0019] Process parameter description: ● Coating Thickness: After resolving the brittleness issue, the coating thickness can be selected between 0.15mm and 2.0mm according to design requirements. 0.15-0.3mm is suitable for efficient production on standard wrapping machines; thicker coatings (such as 0.3mm and above) can shorten the wrapping paper length and reduce the number of winding layers. This method is adapted to large-diameter moxa sticks, achieving the specific high heat and high smoke purification performance of large-diameter moxa sticks. Coatings exceeding 2 mm are difficult to roll into bundles. According to tests, a 2 mm coating thickness is the optimal thickness for smoke control and purification after rolling into bundles for most diameter moxa sticks. Too thin a coating results in poor smoke purification, while too thick a coating makes the moxa wool inside the stick difficult to burn.

[0020] ● Drying control: Pre-drying temperature and time are critical. It is necessary to avoid excessively high temperature or excessive time, which may cause the coating to cure completely. Low temperature and slow drying are recommended, and the coating condition should be closely monitored.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for treating and wrapping a plant charcoal powder coating on moxa sticks, characterized in that, Includes the following steps: A1. Preparation of carbon powder coating liquid: Mix plant carbon powder and binder in a certain proportion, add water and stir to prepare carbon powder coating liquid; A2. Coating and semi-drying treatment: The charcoal powder coating liquid is evenly coated onto the moxa stick paper, and then dried to make the coating semi-dry; the semi-dry state means that the moxa stick paper has basically set, there are no water stains on the coating surface, it feels moist and soft to the touch, and the adhesive has not been completely cured and cross-linked. A3. Semi-wet rolling and wrapping: When the coating is in a semi-dry state, immediately place the moxa wool on the coated moxa stick paper and roll it up to form a moxa stick blank; A4. Final drying: The rolled moxa stick blanks are then subjected to final drying to obtain the finished moxa sticks.

2. The method for processing and wrapping the plant charcoal powder coating of moxa sticks according to claim 1, characterized in that, The charcoal coating is a mixture of fine artemisia argyi charcoal powder, wood charcoal powder, or other plant charcoal powders. In step A2, the thickness of the charcoal coating is 0.15 mm to 2 mm. rice.

3. The method for processing and wrapping the plant charcoal powder coating of moxa sticks according to claim 1, characterized in that, An alternative solution is also included, with the following steps: S1. Preparation of moxa wool pillars: Moxa wool is rolled or pressed into moxa wool pillars of a predetermined shape using a rolling or mold; S2. Surface spraying: Spray a layer of carbon powder coating liquid of the required thickness onto the surface of the moxa cone; S3. Semi-drying treatment: Dry the sprayed moxa cones to make the surface coating semi-dry. S4. Rolling and shaping: The semi-dry moxa stick is rolled and wrapped with moxa paper, and then finally dried.

4. The method for processing and wrapping the plant charcoal powder coating of moxa sticks according to claim 3, characterized in that, In step S1, when the moxa wool column is formed, a layer of pure cotton silk film is covered on its surface to prevent the moxa wool from scattering in subsequent operations.

5. The method for processing and wrapping the plant charcoal powder coating of moxa sticks according to claim 1 or 3, characterized in that, It also includes a step of impregnating both ends of the finished moxa stick with a charcoal powder coating liquid to enhance the smoke control and purification effect at both ends of the moxa stick.

6. The method for processing and wrapping the plant charcoal powder coating of moxa sticks according to claim 1, characterized in that, For completely dried moxa sticks coated with charcoal powder, spray water mist onto the surface of the coating before rolling to restore its flexibility suitable for rolling.

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