Disposable sanitary article with hip care layer and method for preparing hip care layer

Abstract

The present application provides a disposable sanitary product with a hip-care layer, comprising a diaper base body, wherein the diaper base body is provided with a hip-care layer, and the diaper base body comprises a surface layer, an absorbent core and a bottom layer, which are sequentially compounded and formed, characterized in that the hip-care layer comprises an oil-soluble paste and / or a water-soluble paste; the oil-soluble paste is coated on the surface of the surface layer, and the water-soluble paste is coated on the back surface of the surface layer and / or the liquid-accepting side surface of the absorbent core, and the beneficial effect is that the hip-care layer is integrated in the disposable sanitary product, and the nursing effect is obtained when wearing, without the need for additional application operation.

Description

Technical Field

[0001] This invention relates to the field of disposable hygiene products technology, and in particular to disposable hygiene products with a buttock-protecting layer and a method for preparing the buttock-protecting layer. Background Technology

[0002] Diaper rash cream is a widely used skin protection product in daily care, mainly used to prevent and relieve skin problems such as diaper rash caused by prolonged contact of urine and feces with the skin; however, according to current technology, diaper rash cream formulations still have the following significant drawbacks in practical applications: First, the skin safety risks posed by chemical additives are quite prominent. For example, traditional diaper rash creams generally use chemical ingredients such as zinc oxide and petrolatum as the main base or barrier agent. Although these ingredients can form a physical barrier to a certain extent and reduce the contact of external irritants with the skin, long-term use may damage the skin barrier function. This is especially true for infants and young children whose skin barrier is not yet fully developed, which can easily induce contact dermatitis, allergic reactions and other problems, thus limiting the safety of the products and the range of people they are suitable for.

[0003] Secondly, the existing diaper rash creams have a relatively simple functional design, mainly focusing on passive isolation and lacking the ability to actively repair damaged skin. In general, most diaper rash creams on the market only reduce direct contact with irritants such as urine and feces through film formation or isolation mechanisms, but fail to effectively intervene in key physiological mechanisms in the skin barrier repair process (such as lipid replenishment, inflammation regulation, and cell proliferation). Therefore, in actual use, they are difficult to achieve rapid recovery of diaper rash and other skin lesions, and the nursing effect is limited.

[0004] Furthermore, the application efficiency of natural active ingredients in diaper rash creams is relatively low, limiting their potential efficacy. Although plant-derived ingredients (such as shikonin in comfrey extract) possess certain anti-inflammatory and tissue repair-promoting bioactivities, their poor stability in the formulation system, especially under elevated temperature conditions, leads to a decrease in effective content during actual storage and use (reference: Research on Infant Care Products, Vol. 12, P45). At the same time, existing processes are insufficient in their ability to extract, encapsulate, and protect natural ingredients, causing the actual efficacy of the product to deviate from theoretical expectations and making it difficult to meet the needs for efficient, gentle, and long-lasting care.

[0005] In conclusion, developing a diaper rash cream formula that is low in chemical irritation, possesses active repair capabilities, and enhances the stability of natural ingredients has become a pressing technical challenge in this field. Summary of the Invention

[0006] (a) Technical problems to be solved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a disposable sanitary product with a buttock-protecting functional layer and a method for preparing the buttock-protecting functional layer, which solves the technical problems described in the above-mentioned background.

[0007] (II) Technical Solution The purpose of this invention is to provide a disposable sanitary product with a diaper-protecting layer and a method for preparing the diaper-protecting layer. The disposable sanitary product includes a diaper base with a diaper-protecting layer. The diaper base includes a surface layer, an absorbent core, and a bottom layer, which are sequentially laminated. The diaper-protecting layer includes an oil-soluble paste and / or a water-soluble paste. The oil-soluble paste is applied to the surface of the surface layer, and the water-soluble paste is applied to the back of the surface layer and / or the liquid-facing surface of the absorbent core.

[0008] Preferably, the raw materials of the oil-soluble paste, by mass percentage, include: Natural plant extracts: 10.3-5%; Natural plant extracts: 20.5-8%; Natural oils 10-30%; 1-10% natural emulsifier; 3-10% natural film-forming agents; 5-15% natural desiccant; Solvent balance.

[0009] Preferably, the natural emulsifier is a natural alcohol; the natural film-forming agent is beeswax; and the solvent is deionized water.

[0010] Preferably, the raw materials of the water-soluble paste, by mass percentage, include: Natural plant extracts 10.3~5% Natural plant extracts 2 0.5~8% 30-40% natural polyols Natural fat 10~15% Natural stearyl alcohol 5-8% 8-12% natural emulsifier / dispersant 3-5% natural surfactants Natural phospholipids 2-4% Natural β-cyclodextrin 3~6% 5-8% natural glycerin Add appropriate amount of natural preservatives.

[0011] Preferably, the raw material formula of the water-soluble paste also includes an appropriate amount of fragrance.

[0012] Preferably, an oil-soluble paste is applied only to the surface of the surface layer.

[0013] Preferably, a water-soluble paste is applied only to the back side of the surface layer.

[0014] Preferably, a water-soluble paste is applied only to the liquid-facing surface of the absorbent core.

[0015] In addition, a method for preparing an oil-soluble paste is also included, the method comprising the following steps: 1) Raw material pretreatment: Mix natural plant extract 1, natural plant extract 2, natural hygroscopic agent and solvent, stir and dissolve to obtain aqueous phase; mix natural oil, beeswax and natural film-forming agent to obtain oil phase; natural emulsifier is set aside separately. 2) Vacuum homogenization of natural plant extracts: The aqueous phase obtained in 1) is placed in a vacuum emulsification pot and vacuum homogenized under a negative pressure of 35~50℃ and -0.07~-0.09MPa to fully disperse the natural plant extracts, isolate them from air to prevent oxidation and deactivation, and obtain a stable aqueous slurry. 3) Heat the oil phase obtained in 1) to 60℃±5℃ and stir until the natural oils, beeswax and natural film-forming agents are completely melted to form a uniform and transparent oil phase liquid; 4) Mixing and emulsification: Under continuous stirring, the molten oil phase is slowly added to the aqueous phase in the vacuum emulsification pot, and a natural emulsifier is added at the same time; then, the temperature is maintained at 45–55℃, and high-speed shear emulsification is carried out to fully emulsify and disperse the aqueous phase, oil phase and each component to form a uniform emulsion system. 5) Vacuum degassing: After emulsification, continue stirring and keeping warm under vacuum to remove air bubbles from the emulsion and obtain a fine and stable coating slurry. 6) Paste forming: Cool the defoamed slurry to room temperature and let it cool and solidify.

[0016] Additionally, a method for preparing a water-soluble paste is also included, the method comprising the following steps: (1) Raw material pretreatment: Each component is prepared for use; (2) Vacuum homogenization of natural plant extracts: (1) Natural plant extract 1, natural plant extract 2, natural β-cyclodextrin and some natural glycerin are placed in a vacuum emulsifying pot for premixing. Vacuum homogenization is carried out under the conditions of temperature 35~50℃ and negative pressure of -0.07~-0.09MPa to fully disperse the natural plant extracts and isolate them from the air to prevent oxidation and inactivation. (3) Melting: The natural polyol, natural lipid, natural stearyl alcohol and the remaining natural glycerin are heated to 70~75℃ to melt and form a homogeneous oil phase system; (4) Structure construction: Add natural emulsifiers / dispersants, natural surfactants and natural phospholipids to the molten oil phase, stir and disperse evenly to construct the structure; (5) Mixing: Cool the system to 60°C, add the remaining plant extracts, natural preservatives, and natural fragrances, and mix well; (6) Paste forming: Cool the defoamed slurry to room temperature and cool to set.

[0017] (III) Beneficial Effects The disposable sanitary product with a buttock-protecting layer provided by this invention has the following beneficial effects: (1) By applying an oil-soluble ointment to the surface of the skin, an isolation layer is formed, which reduces the migration of liquid irritants such as urine to the skin surface and avoids problems such as contact dermatitis and allergic reactions.

[0018] (2) By applying a water-soluble ointment to the back of the surface layer and / or the liquid-facing side of the absorbent core, the water-soluble ointment releases its active ingredients after contact with urine, thus caring for the skin contact area and preventing problems such as contact dermatitis and allergic reactions.

[0019] (3) Oil-soluble and / or water-soluble ointments contain natural active ingredients. By utilizing the biocompatibility and anti-inflammatory and repair functions of natural active ingredients, the risk of chemical irritation to the skin can be reduced.

[0020] (4) By setting the buttock-protecting efficacy layer including oil-soluble cream and / or water-soluble cream, it can achieve oil-based isolation, water-based release and repair, or a combination of isolation and repair functions at the same time.

[0021] (5) The buttock-protecting layer is integrated into the inside of disposable sanitary products, so that the care effect is obtained upon wearing, without the need for additional application. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0023] Figure 1 This is a schematic diagram of the application method of a disposable sanitary product with a buttock-protecting functional layer and its preparation method; Figure 2 A diagram illustrating the sustained-release mechanism of oil-soluble ointment-type microcapsules containing a diaper-protecting layer and its preparation method; Explanation of reference numerals in the attached figures: 1. Surface layer; ① Surface coating; ② Back coating; 2. Absorbent core; ③ Core surface layer; 3. Bottom layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] The following is in conjunction with the appendix Figure 1 To further describe, this invention discloses a disposable sanitary product with a diaper-protecting layer and a method for preparing the diaper-protecting layer. The product includes a diaper base with a diaper-protecting layer. The diaper base comprises a surface layer, an absorbent core, and a bottom layer, which are sequentially laminated. The diaper-protecting layer comprises an oil-soluble paste and / or a water-soluble paste. The coating method of the diaper-protecting layer is as follows: 1. Apply the oil-soluble ointment alone to the surface of the disposable sanitary product to form a surface coating. This surface is the one that comes into contact with the skin. The oil-soluble ointment forms an insulating and protective film on this surface, which directly adheres to the skin, achieving the effects of protecting the buttocks, isolating moisture, repairing, and reducing friction and irritation. 2. Only water-soluble ointment is selected. It is applied alone to the back of the surface layer or alone to the surface of the absorbent core to form a back coating and a core surface coating, respectively. Utilizing the hydrophilic and easily soluble properties of the water-soluble ointment, it accelerates liquid drainage and penetration, soothes skin discomfort, and achieves the effects of protecting the buttocks, isolating moisture, repairing, and reducing friction and irritation.

[0026] 3. The oil-soluble cream is fixedly applied to the surface, adhering closely to the skin to form a protective layer; at the same time, the water-soluble cream is applied to one or two places on the back of the surface layer and the surface of the absorbent core. The upper layer protects the skin and isolates moisture, while the lower layer accelerates liquid conduction, neutralizes odors, and soothes redness. The two-layer cream is combined in different areas to take into account both the protection of the buttocks and skin and the rapid absorption and conduction of liquid.

[0027] During the coating process, the coating amount of both oil-soluble and water-soluble pastes is 2-6 g / m², and the coating method is either dot coating or strip coating. The coating coverage rate is 40%-70%, and in this embodiment, a coverage rate of 50% is preferred.

[0028] Different application methods result in different effects. Specifically, when an oil-soluble ointment is applied alone to the surface of a disposable hygiene product for infants and young children, the ointment will transfer to the baby's bottom during activity, forming a protective oil film. This protective film acts as a barrier against irritation from urine and feces, and the natural plant extracts also provide benefits such as soothing, moisturizing, and antibacterial effects. Furthermore, when infants and young children use disposable sanitary products with the water-soluble paste applied alone to the back of the surface layer or the surface of the absorbent core, the β-cyclodextrin (β-CD) in the water-soluble paste of this invention forms a 1:1 host-guest inclusion complex (inclusion constant) with the hydrophobic plant extract through its hydrophobic cavity. When the diaper rash protection layer comes into contact with urine, the following release cascade is triggered: (1) Water molecules in the urine enter the β-CD cavity through a competitive displacement mechanism (competitive release effect), causing the encapsulated plant extracts to be released from the cavity; the release process conforms to the chemical equilibrium theory, and the release rate can be regulated by changing the concentration and binding ability of the competing molecules. (2) The released plant extracts and the liposome structure formed by natural phospholipids (2~4%) synergistically enhance each other, and the phospholipid bilayer enhances the transdermal permeability of the active ingredients. (3) The release kinetics conform to the Korsmeyer-Peppas model: The release index n value ranged from 0.43 to 0.85, indicating non-Fick diffusion (co-controlled by dissolution and diffusion). (Literature reference: The Mechanism and New Strategy on Competitive Release Effect of β-Cyclodextrin Inclusion Complexes, Journal of Chemistry, 2024; The competitive release of β-CD inclusion complexes conforms to the chemical equilibrium theory, and weakly bound molecules can also induce a competitive release effect.) In addition, when an oil-soluble ointment is applied to the surface of a disposable sanitary product, and a water-soluble ointment is simultaneously applied to one or two places on the back of the surface and the surface of the absorbent core, the effects of both types of diaper-protecting layers are combined. Furthermore, the preparation of oil-soluble pastes will be further illustrated below through examples: Example 1

[0029] In this embodiment, the raw materials of the oil-soluble paste, by mass percentage, include: Natural plant extracts: 10.3%; Natural plant extracts 20.5%; 10% natural oils; 1% natural emulsifier; 3% natural film-forming agent; 5% natural moisture absorbent; Solvent balance. Example 2

[0030] In this embodiment, the raw materials of the oil-soluble paste, by mass percentage, include: Natural plant extracts: 10.5%; 2.2% natural plant extracts; 20% natural oils; 5% natural emulsifier; 6% natural film-forming agent; 10% natural desiccant; Solvent balance. Example 3

[0031] In this embodiment, the raw materials of the oil-soluble paste, by mass percentage, include: 1.5% natural plant extracts; 28% natural plant extracts; 30% natural oils; 10% natural emulsifier; 10% natural film-forming agent; 15% natural moisture absorbent; Solvent balance.

[0032] In the above embodiments, the natural emulsifier is a natural alcohol; the natural film-forming agent is beeswax; and the solvent is deionized water.

[0033] Based on the raw material ratios of the above three embodiments, the preparation method of this oil-soluble paste adopts the following steps: 1) Raw material pretreatment: Mix natural plant extract 1, natural plant extract 2, natural hygroscopic agent and solvent, stir and dissolve to obtain aqueous phase; mix natural oil, beeswax and natural film-forming agent to obtain oil phase; natural emulsifier is set aside separately. 2) Vacuum homogenization of natural plant extracts: The aqueous phase obtained in 1) is placed in a vacuum emulsification pot and mixed in a vacuum homogenization environment (oxygen content ≤0.5%). Vacuum homogenization is carried out at a temperature of 35~50℃ and a negative pressure of -0.07~-0.09MPa to fully disperse the natural plant extracts, isolate them from air to prevent oxidation and deactivation, and obtain a stable aqueous slurry. 3) Heat the oil phase obtained in 1) to 60℃±5℃ and stir until the natural oils, beeswax and natural film-forming agents are completely melted to form a uniform and transparent oil phase liquid; 4) Mixing and emulsification: Under continuous stirring, the molten oil phase is slowly added to the aqueous phase in the vacuum emulsification pot, and a natural emulsifier is added at the same time; then, the temperature is maintained at 45–55℃, and high-speed shear emulsification is carried out to fully emulsify and disperse the aqueous phase, oil phase and each component to form a uniform emulsion system. 5) Vacuum degassing: After emulsification, continue stirring and keeping warm under vacuum to remove air bubbles from the emulsion and obtain a fine and stable coating slurry. 6) Paste forming: Cool the defoamed slurry to room temperature and let it cool and solidify.

[0034] In the above embodiments, Furthermore, the functions and naturalness of the above-mentioned raw material components are explained as follows:

[0035] During the preparation process, the natural oils, beeswax and natural alcohols in this formula form a dense three-dimensional network structure in the oil phase during emulsification and cooling, which uniformly encapsulates the aqueous phase dispersion droplets containing natural plant extracts, forming a microcapsule-like water-in-oil emulsion system.

[0036] On the other hand, the preparation of water-soluble pastes will be further illustrated below through examples: Example 1 In this embodiment, the raw materials of the water-soluble paste, by mass percentage, include: Natural plant extracts 1 0.3% Natural plant extracts 2 0.5% 30% natural polyols 10% natural fat 5% natural stearyl alcohol 8% natural emulsifier / dispersant 3% natural surfactants 2% natural phospholipids 3% natural β-cyclodextrin 5% natural glycerin Appropriate amount of natural preservatives; In this embodiment, the raw material formulation of the water-soluble paste also includes an appropriate amount of fragrance. Example 2 In this embodiment, the raw materials of the water-soluble paste, by mass percentage, include: 1.2% natural plant extracts 2.5% natural plant extracts 40% natural polyols Natural fat 12% Natural stearyl alcohol 8% 10% natural emulsifier / dispersant 5% natural surfactant 4% natural phospholipids 5% natural β-cyclodextrin 7% natural glycerin Add appropriate amount of natural preservatives.

[0037] Example 3 In this embodiment, the raw materials of the water-soluble paste, by mass percentage, include: 1.5% natural plant extracts 28% natural plant extracts 40% natural polyols Natural fat 15% Natural stearyl alcohol 8% 12% natural emulsifier / dispersant 5% natural surfactant 4% natural phospholipids 6% natural β-cyclodextrin 8% natural glycerin Add appropriate amount of natural preservatives.

[0038] As can be seen from the above examples, the raw material formula of water-soluble pastes can also include an appropriate amount of fragrance.

[0039] Based on the raw material ratios of the above three embodiments, the preparation method of this water-soluble paste adopts the following steps: (1) Raw material pretreatment: Each component is prepared for use; (2) Vacuum homogenization of natural plant extracts: (1) Natural plant extract 1, natural plant extract 2, natural β-cyclodextrin and some natural glycerin are placed in a vacuum emulsification pot and mixed in a vacuum homogenization environment (oxygen content ≤0.5%). Vacuum homogenization is carried out under negative pressure conditions of 35~50℃ and -0.07~-0.09MPa to fully disperse the natural plant extracts and isolate them from air to prevent oxidation and inactivation. (3) Melting: The natural polyol, natural lipid, natural stearyl alcohol and the remaining natural glycerin are heated to 70~75℃ to melt and form a homogeneous oil phase system; (4) Structure construction: Add natural emulsifiers / dispersants, natural surfactants and natural phospholipids to the molten oil phase, stir and disperse evenly to construct the structure; (5) Mixing: Cool the system to 60°C, add the remaining plant extracts, natural preservatives, and natural fragrances, and mix well; (6) Paste forming: Cool the defoamed slurry to room temperature and cool to set.

[0040] Furthermore, the functions and naturalness of the above-mentioned raw material components are explained as follows:

[0041] During the preparation process, this formula utilizes the inclusion effect of natural β-cyclodextrin to molecularly encapsulate oil-soluble natural plant extracts, forming a microcapsule-like structure, which enhances the stability and sustained-release performance of the active ingredients.

[0042] It should be noted that in the above formula, natural plant extract 1 and natural plant extract 2 are one or more of the following: Xinjiang soft purple gromwell extract, centella asiatica extract, purslane extract, and calendula extract. Among them, Xinjiang soft purple gromwell extract and centella asiatica extract are preferred. For example, in one case, the natural plant extract 1 is selected from Xinjiang soft purple gromwell extract. In one case, natural plant extract 2 is Centella asiatica extract; in another case, natural plant extract 1 is Xinjiang soft purple chrysanthemum extract. For herb extracts, natural plant extract 2 uses purslane extract, and so on. Among them, the comfrey extract reduces inflammation by inhibiting the proliferation of pathogenic bacteria in the diaper area; the centella asiatica extract promotes skin barrier repair and accelerates the healing of damaged wounds; the calendula extract and purslane extract soothe redness and discomfort caused by urinary ammonia irritation. The above natural plant extracts work together to achieve multiple diaper rash protection effects, including antibacterial, anti-inflammatory, repairing and moisturizing.

[0043] This product has undergone third-party testing. The relevant test items and results are as follows:

[0044] As can be seen from the above embodiments, the disposable sanitary product with a buttock-protecting layer provided by the present invention has the following beneficial effects: (1) By applying an oil-soluble ointment to the surface of the skin, an isolation layer is formed, which reduces the migration of liquid irritants such as urine to the skin surface and avoids problems such as contact dermatitis and allergic reactions.

[0045] (2) By applying a water-soluble ointment to the back of the surface layer and / or the liquid-facing side of the absorbent core, the water-soluble ointment releases its active ingredients after contact with urine, thus caring for the skin contact area and preventing problems such as contact dermatitis and allergic reactions.

[0046] (3) Oil-soluble and / or water-soluble ointments contain natural active ingredients. By utilizing the biocompatibility and anti-inflammatory and repair functions of natural active ingredients, the risk of chemical irritation to the skin can be reduced.

[0047] (4) By setting the buttock-protecting efficacy layer including oil-soluble cream and / or water-soluble cream, it can achieve oil-based isolation, water-based release and repair, or a combination of isolation and repair functions at the same time.

[0048] (5) The buttock-protecting layer is integrated into the inside of disposable sanitary products, so that the care effect is obtained upon wearing, without the need for additional application.

[0049] Although embodiments of the present invention have been shown above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications and variations to the above embodiments, but such modifications are all included within the broad scope of the foregoing disclosure, drawings and claims.

Claims

1. A disposable sanitary product with a diaper-protecting layer, comprising a diaper base, wherein the diaper base has a diaper-protecting layer, the diaper base comprising a top layer, an absorbent core, and a bottom layer, wherein the top layer, absorbent core, and bottom layer are sequentially laminated, characterized in that: The buttock-protecting functional layer includes an oil-soluble ointment and / or a water-soluble ointment; the oil-soluble ointment is applied to the surface of the surface layer, and the water-soluble ointment is applied to the back of the surface layer and / or the liquid-facing surface of the absorbent core.

2. The disposable sanitary product with a buttock-protecting layer according to claim 1, characterized in that: The raw materials of the oil-soluble paste, by mass percentage, include: Natural plant extracts: 10.3-5%; Natural plant extracts: 20.5-8%; Natural oils 10-30%; 1-10% natural emulsifier; 3-10% natural film-forming agents; 5-15% natural desiccant; Solvent balance.

3. The disposable sanitary product with a buttock-protecting layer according to claim 2, characterized in that: The natural emulsifier is a natural alcohol; the natural film-forming agent is beeswax; and the solvent is deionized water.

4. The disposable sanitary product with a buttock-protecting layer according to claim 1, characterized in that: The raw materials of the water-soluble paste, by mass percentage, include: Natural plant extracts 10.3~5% Natural plant extracts 2 0.5~8% 30-40% natural polyols Natural fat 10~15% Natural stearyl alcohol 5-8% 8-12% natural emulsifier / dispersant 3-5% natural surfactants Natural phospholipids 2-4% Natural β-cyclodextrin 3~6% 5-8% natural glycerin Add appropriate amount of natural preservatives.

5. The disposable sanitary product with a buttock-protecting layer according to claim 4, characterized in that: The raw material formula of the water-soluble paste also includes an appropriate amount of fragrance.

6. The disposable sanitary product with a buttock-protecting layer according to claim 1, characterized in that: An oil-soluble paste is applied only to the surface of the surface layer.

7. The disposable sanitary product with a buttock-protecting layer according to claim 1, characterized in that: A water-soluble paste is applied only to the back side of the surface layer.

8. The disposable sanitary product with a buttock-protecting layer according to claim 1, characterized in that: A water-soluble paste is applied only to the liquid-facing surface of the absorbent core.

9. A method for preparing an oil-soluble paste as described in claim 2, characterized in that, The method for preparing the oil-soluble paste includes the following steps: 1) Raw material pretreatment: Mix natural plant extract 1, natural plant extract 2, natural hygroscopic agent and solvent, stir and dissolve to obtain aqueous phase; mix natural oil, beeswax and natural film-forming agent to obtain oil phase; natural emulsifier is set aside separately. 2) Vacuum homogenization of natural plant extracts: The aqueous phase obtained in 1) is placed in a vacuum emulsification pot and vacuum homogenized under a negative pressure of 35~50℃ and -0.07~-0.09MPa to fully disperse the natural plant extracts, isolate them from air to prevent oxidation and deactivation, and obtain a stable aqueous slurry. 3) Heat the oil phase obtained in 1) to 60℃±5℃ and stir until the natural oils, beeswax and natural film-forming agents are completely melted to form a uniform and transparent oil phase liquid; 4) Mixing and emulsification: Under continuous stirring, the molten oil phase is slowly added to the aqueous phase in the vacuum emulsification pot, and a natural emulsifier is added at the same time; then, the temperature is maintained at 45–55℃, and high-speed shear emulsification is carried out to fully emulsify and disperse the aqueous phase, oil phase and each component to form a uniform emulsion system. 5) Vacuum degassing: After emulsification, continue stirring and keeping warm under vacuum to remove air bubbles from the emulsion and obtain a fine and stable coating slurry. 6) Paste forming: Cool the defoamed slurry to room temperature and let it cool and solidify.

10. A method for preparing a water-soluble paste as described in claim 4, characterized in that, The method for preparing the water-soluble paste includes the following steps: (1) Raw material pretreatment: Each component is prepared for use; (2) Vacuum homogenization of natural plant extracts: (1) Natural plant extract 1, natural plant extract 2, natural β-cyclodextrin and some natural glycerin are placed in a vacuum emulsifying pot for premixing. Vacuum homogenization is carried out under the conditions of temperature 35~50℃ and negative pressure of -0.07~-0.09MPa to fully disperse the natural plant extracts and isolate them from the air to prevent oxidation and inactivation. (3) Melting: The natural polyol, natural lipid, natural stearyl alcohol and the remaining natural glycerin are heated to 70~75℃ to melt and form a homogeneous oil phase system; (4) Structure construction: Add natural emulsifiers / dispersants, natural surfactants and natural phospholipids to the molten oil phase, stir and disperse evenly to construct the structure; (5) Mixing: Cool the system to 60°C, add the remaining plant extracts, natural preservatives, and natural fragrances, and mix well; (6) Paste forming: Cool the defoamed slurry to room temperature and cool to set.

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