Self-adhesive hygienic product

Abstract

The utility model relates to a self-adhesive hygienic product. The self-adhesive hygienic product is in a fingerstall shape or a sheet shape, the self-adhesive hygienic product is provided with a first face on the surface side and a second face located on the reverse side of the first face, and the self-adhesive hygienic product is provided with a micro-nano array structure which can achieve reversible wet adhesion and is used for being adhered to vaginal orifice or urethral orifice tissue on the first face. The self-adhesive hygienic product is breathable and liquid-tight, and when the self-adhesive hygienic product is adhered to vaginal orifice or urethral orifice tissues, the self-adhesive hygienic product completely blocks the vaginal orifice or the urethral orifice so as to prevent contents in the vagina or the urethral orifice from flowing out. The self-adhesive hygienic product has the advantages of safety, comfort, privacy, environmental protection, burdenability and the like.

Description

Technical Field

[0001] The utility model relates to a sanitary product, and more particularly to a self-adhesive sanitary product. Background Art

[0002] At present, women's menstrual hygiene products and diapers used by patients with urinary incontinence generally have problems such as poor performance and environmental pollution. Women's menstrual hygiene products are divided into three categories, including menstrual cups, sanitary napkins and tampons.

[0003] 1) Menstrual cup: The main material is silicone and the shape is cup-shaped. During menstruation, the menstrual cup is flattened and inserted into the vagina. It is taken out every 4-12 hours, the menstrual blood in the cup is poured out, and then put back into the vagina to continue to hold it. After the menstrual period is over, the menstrual cup is washed and boiled in boiling water, and then dried for later use. The menstrual cup can be used repeatedly, but it is inconvenient to operate, the comfort is not good, and special attention should be paid to disinfection and sterilization, so few users use it.

[0004] 2) Sanitary napkins: The main raw material is a polymer absorbent resin that can absorb menstrual blood. During menstruation, the sanitary napkin is attached to the inside of the underwear and replaced every 4 hours. Sanitary napkins are easy to use and have many users. However, sanitary napkins have problems such as leakage, poor comfort, and cannot be used for swimming and other sports. Sanitary napkins are disposable products and cannot be recycled after being contaminated by menstrual blood, which pollutes the environment. In addition, sanitary napkins are sold at a high price, and problems such as "menstrual poverty" have emerged in society.

[0005] 3) Tampons: The main raw materials are cotton fiber and viscose fiber, which can absorb menstrual blood. During menstruation, tampons are inserted into the vagina and replaced from time to time. Tampons do not affect exercise, but they are inconvenient to operate and not comfortable, so they are rarely used. In addition, tampons are also disposable products. They cannot be recycled after being contaminated by menstrual blood, which pollutes the environment.

[0006] In addition, patients with urinary incontinence need to use diapers frequently, which will cause environmental pollution. For some families, frequent changes of diapers will also result in unbearable expenses. Utility Model Content

[0007] In view of the problems existing in current women's menstrual hygiene products, such as inconvenient operation, poor comfort, leakage, environmental pollution, high prices, and problems faced by patients with urinary incontinence, the utility model aims to provide a self-adhesive hygiene product and a preparation method thereof that has the advantages of safety, comfort, privacy, environmental protection, and affordability.

[0008] The technical solution of the self-adhesive sanitary product of the utility model is:

[0009] A self-adhesive sanitary product, wherein:

[0010] The self-adhesive sanitary product is in the shape of a finger sleeve or a sheet, and has a first surface located on the surface side and a second surface located on the opposite side of the first surface.

[0011] The self-adhesive sanitary product has a micro-nano array structure on the first surface that can achieve reversible wet adhesion and is used to adhere to the vaginal opening or urethral opening tissue.

[0012] The self-adhesive sanitary product is breathable and liquid-impermeable. When the self-adhesive sanitary product is adhered to the vaginal opening or urethral opening tissue, the self-adhesive sanitary product completely blocks the vaginal opening or urethral opening to prevent the contents of the vagina or urethra from flowing out.

[0013] Optionally, the self-adhesive sanitary product comprises a base layer and a surface adhesive layer, wherein the base layer provides mechanical support for the surface adhesive layer, and the surface adhesive layer has the micro-nano array structure on the first surface.

[0014] Optionally, the micro-nano array structure includes an octopus-like structure, which has a plurality of suction cups, the outer diameter of the suction cups is 20-500 μm, the inner diameter of the suction cups is 10-300 μm, the height of the suction cups is 10-200 μm, and the spacing between the outer diameters of the suction cups is 0.5-2 times the inner diameter of the suction cups.

[0015] Optionally, the outer diameter of the suction cup is 100-200 μm, the inner diameter of the suction cup is 50-150 μm, and the height of the suction cup is 30-100 μm.

[0016] Optionally, the self-adhesive sanitary product has a wet adhesion strength of 10-100 kPa.

[0017] Optionally, the thickness of the self-adhesive sanitary product in the shape of a finger sleeve is 0.1-0.5 mm, the length is 1-3 cm, and the diameter of the open end of the finger sleeve shape is 1.2-2 cm;

[0018] The sheet-shaped self-adhesive sanitary product has a thickness of 0.1-0.5 mm and is formed to a size that can completely block the vaginal opening or the urethral opening.

[0019] Optionally, the thickness of the base layer is 90-300 μm, the thickness of the surface adhesive layer is 10-200 μm, and the thickness of the base layer is thicker than that of the surface adhesive layer.

[0020] Optionally, the self-adhesive sanitary product has a modulus of 10-100 kPa and a breaking stress of 1-10 MPa.

[0021] Optionally, a drug-loaded sustained-release layer is provided on the first surface of the self-adhesive sanitary product, and when the self-adhesive sanitary product is adhered to the vaginal or urethral opening tissue, the drug is sustained-released into the vagina or urethra.

[0022] Optionally, at least a portion of the suction cup in the height direction has an elastic folding portion, and in the absence of external force, the elastic folding portion is in a naturally extended state, and in the presence of external force, the elastic folding portion can be compressed and folded.

[0023] Optionally, the micro-nano array structure further comprises a mechanical interlocking structure as a complementary structure formed on the first surface and engaged with the tissue surface of the vaginal or urethral opening tissue.

[0024] At present, menstrual cups, sanitary napkins, tampons, etc. each have their own disadvantages. The self-adhesive sanitary products provided by the utility model have excellent comprehensive performance, and have the advantages of safety, comfort, privacy, environmental protection, affordability, etc., and will be able to replace existing female menstrual sanitary products. At the same time, for patients with urinary incontinence, it can also replace diapers.

[0025] 1) Technical level: Using innovative materials science technology, a reversible wet-adhesive micro-nano array structure is prepared on the surface of the material, so that the technical solution can be safely adhered to the vaginal or urethral opening to prevent menstrual blood leakage and urine seepage. The basic principle of this utility model overturns the principle of absorbing or containing menstrual blood used in current menstrual hygiene products, as well as the principle of diapers absorbing urine, and can minimize the size of the product, making it soft and comfortable. It uses biocompatible and degradable environmentally friendly materials, which are environmentally friendly and pollution-free.

[0026] 2) Application level: In terms of appearance, the utility model is a miniature product, only the size of the tip of the index finger, significantly smaller than the size of menstrual cups, sanitary napkins, tampons and diapers, and has good concealment; in addition, the reversible wet adhesion micro-nano array structure can ensure safety and no leakage, swimming during menstruation, softness and comfort, etc.; the raw materials and processing methods used in this technical solution are low-cost, and are low-priced and affordable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram of an octopus's tentacles.

[0028] Figure 2 It is a schematic diagram of the self-adhesive sanitary product of the present invention, wherein the finger used to engage the self-adhesive sanitary product during use is additionally shown.

[0029] Figure 3 It is a schematic diagram of one usage state of the self-adhesive sanitary product of the utility model.

[0030] Figure 4It is a schematic diagram of the self-adhesive sanitary product of the utility model.

[0031] Figure 5 It is a schematic diagram of the base layer and the surface adhesive layer of the self-adhesive sanitary product of the utility model.

[0032] Figure 6 It is a schematic diagram of an octopus-like structure of the self-adhesive sanitary product of the utility model.

[0033] Figure 7 and Figure 8 It is a schematic diagram of the elastic folding portion of the self-adhesive sanitary product of the utility model.

[0034] Description of Reference Numerals

[0035] 1. Suction cup of octopus tentacle, 2. Self-adhesive sanitary product, 3. Vaginal opening, 4. Surface adhesive layer, 5. Base layer, 6. Suction cup, 7. Elastic folded part. DETAILED DESCRIPTION

[0036] The self-adhesive sanitary products of the utility model are described below in conjunction with the accompanying drawings. It should be noted that the sizes of the components in the accompanying drawings are inconsistent with the actual sizes, and it is necessary to consider them in reference to the actual situation. In addition, the implementation methods described below are only examples for illustrating the present application, and the present application is not limited thereto. Modifications, combinations, changes, etc. within the scope of protection of the present application are all included in the present application.

[0037] First embodiment

[0038] Figure 1 The tentacles of an octopus are shown, and there are a plurality of suckers 1 of the tentacles of the octopus. Typically, an octopus has eight sensitive tentacles, and each of the tentacles has about 300 suckers. The suckers of each octopus tentacle can provide corresponding suction.

[0039] The self-adhesive sanitary product of the utility model is innovatively designed with reference to the working principle of the suction cup of an octopus.

[0040] like Figure 2 As shown, the self-adhesive sanitary product 2 of the present invention is in the shape of a finger sleeve, one end of which is open and the other end is closed. Figure 3 The female reproductive system is shown, wherein the self-adhesive sanitary product 2 of the present invention is adhered to the vaginal opening 3 .

[0041] The self-adhesive sanitary product 2 is designed in the shape of a finger sleeve, which is beneficial for fingers, such as the middle finger or Figure 2The tip of the index finger shown in the figure is inserted into the self-adhesive sanitary product 2, and then in the next step, the self-adhesive sanitary product 2 is gently placed into the vaginal opening with the help of the finger, and the finger tip is gently pressed to make it close to the vaginal wall, and then the finger is removed, so that the self-adhesive sanitary product 2 is adhered to the vaginal opening 3 or the urethral opening (not shown). When the self-adhesive sanitary product needs to be removed, the self-adhesive sanitary product 2 can be pulled outward in a tangential direction to remove the adhesion.

[0042] Figure 4 A preferred size design of the self-adhesive sanitary product 2 is shown. Figure 4 As shown, the diameter D of the open end of the self-adhesive sanitary product 2 is 1.2-2 cm, preferably 1.5 cm. The length L of the self-adhesive sanitary product 2 is 1-3 cm, preferably 2 cm. In addition, the thickness of the self-adhesive sanitary product 2 is 0.1-0.5 mm, preferably 0.15 mm. This preferred size is designed based on the size of most people's fingers, and other sizes are also possible to meet different size requirements. In this way, the self-adhesive sanitary product 2 is designed to be light, thin and small, so that it is easy to store and use, and avoid the foreign body sensation during use.

[0043] Figure 5 A portion of the self-adhesive sanitary product 2 is cut out to illustrate the stacked structure of the self-adhesive sanitary product 2. Figure 5 As shown, the self-adhesive sanitary product 2 may include a base layer 5 and a surface adhesive layer 4 located on the upper surface thereof.

[0044] The base layer 5 provides mechanical support for the surface adhesive layer 4, ensuring that the material of the self-adhesive sanitary product 2 is soft and tough. The thickness h2 of the base layer 5 may be 90-300 μm, preferably 100 μm.

[0045] The surface adhesive layer 4 has a micro-nano array structure on its surface that can achieve reversible wet adhesion and is used to adhere to the vaginal opening tissue. The thickness h1 of the surface adhesive layer 4 can be 10-200 μm, preferably 50 μm.

[0046] The self-adhesive sanitary product 2 can ensure air permeability and liquid impermeability under the condition of tight adhesion, and its wet adhesion strength is preferably 10-100 kPa, so that it can be well adhered to the vaginal opening. The thickness of the base layer 5 can be designed to be thicker than the thickness of the surface adhesive layer 4 to provide sufficient support. The modulus of the self-adhesive sanitary product 2 of the utility model is 10-100 kPa, and the breaking stress is 1-10 MPa.

[0047] Taking into account both biocompatibility and degradable properties, the materials of the base layer 5 and the surface adhesion layer 4 can include: sodium alginate, hyaluronic acid, carboxymethyl cellulose, xanthan gum, gellan gum, gelatin, chitosan, medical polyurethane, polyglycolic acid, polylactic acid, polylactic acid-glycolic acid copolymer, polycaprolactone. The above materials can be used alone or in combination. In addition, the surface adhesion layer 4 can also include a double network gel or a fiber braided gel prepared by combining the above materials.

[0048] Although in the attached Figure 5 The self-adhesive sanitary product 2 is shown to have a base layer 5 and a surface adhesive layer 4, but the self-adhesive sanitary product 2 of the present invention is not limited to the above-mentioned stacked structure, and can also be integrally formed with the same material, and other layer structures can be added without affecting the use.

[0049] The micro-nano array structure in this embodiment can be implemented as an octopus-like structure. Figure 6 As shown, the octopus-like structure includes a plurality of suction cups. It should be noted that for the purpose of illustration, Figure 6 Only part of the suction cup array structure is shown. Figure 6 The proportions shown in do not constitute a limitation to the present application. The outer diameter D1 of the suction cup is 20-500μm, preferably 100-200μm, more preferably 150μm; the inner diameter D2 of the suction cup is 10-300μm, preferably 50-150μm, more preferably 100μm; the height h of the suction cup is 10-200μm, preferably 10-100μm, more preferably 50μm. The minimum spacing D3 between the outer diameters of the suction cups is 0.5-2 times the inner diameter of the suction cup, preferably 0.5 times, that is, D3 = D2 / 2. When the minimum spacing D3 between the outer diameters of the suction cups is set to be greater than the above maximum value, the density of the micro-nano array structure is too high and the processing quality will be reduced. When the minimum spacing D3 between the outer diameters of the suction cups is set to be less than the above minimum value, the density of the micro-nano array structure is too low, resulting in poor adhesion.

[0050] The micro-nano array structure is distributed over at least a portion of the surface of the self-adhesive sanitary product 2. It is easy to understand that the area and number of the micro-nano array structure are not specifically limited as long as they can reliably adhere to the vaginal opening tissue.

[0051] Second embodiment

[0052] The second embodiment changes the specific structure of the suction cup on the basis of the first embodiment, and other parameters are the same as those of the first embodiment, and descriptions of the same or similar parts are omitted.

[0053] like Figure 7 and Figure 8As shown, the wall of the suction cup is provided with an elastic folding portion 7 along the entire height direction. The elastic folding portion 7 is formed by folding the wall of the suction cup in the height direction and has elasticity similar to that of a spring. Figure 7 As shown, in the absence of external force, the elastic folded portion 7 stretches naturally and is in a naturally stretched state. Figure 8 As shown in FIG. 1 , when subjected to the external force indicated by the arrow, the elastic folding portion 7 is compressed and folded. Figure 7 The natural stretch shown transitions to Figure 8 In the stressed and compressed state shown, the air inside the elastic folded portion 7 is partially discharged, and the negative pressure thus formed can be used to more firmly bond the self-adhesive sanitary product to the vaginal opening.

[0054] The specific values ​​of the size and distribution of the elastic folded portion can refer to the design values ​​of the size and distribution of the aforementioned suction cup structure. However, further preferably, Figure 7 and Figure 8 The dimensions of the elastic fold in can be designed as follows:

[0055] L1=150 μm; (L1 may be between 100-200 μm, L1 is the distance between the top and bottom of the elastic folded portion 7 in a naturally stretched state)

[0056] L2=100 μm; (L2 can be between 50-150 μm, L2 is the distance between the top and bottom of the elastic folded portion 7 when it is under stress and compression)

[0057] W = 150 μm; (W can be between 100-200 μm, W is the inner diameter of the elastic folded portion 7)

[0058] m=30 μm; (m can be between 10-50 μm, m is the wall thickness of the elastic folded portion 7)

[0059] θ=60°. (θ can be between 50°-70°, θ is the angle formed between the wall portions after the elastic folding portion 7 is folded in the naturally stretched state)

[0060] In the case of the aforementioned suction cup without an elastic folding portion, the self-adhesive sanitary product can be adhered to the vaginal opening by utilizing the adhesive effect brought about by the size of the suction cup itself and the material of the suction cup. Further, by using a suction cup with an elastic folding portion, the self-adhesive sanitary product can be more firmly attached to the vaginal opening by utilizing the negative pressure generated by the elastic folding portion during the folding process, further reducing the possibility of leakage.

[0061] In the present embodiment, the wall of the suction cup is provided with the elastic folded portion 7 along the entire height direction, but the invention is not limited thereto, and the elastic folded portion may also be provided along the entire height direction.

[0062] Third embodiment

[0063] The third embodiment changes the shape of the self-adhesive sanitary product 2 on the basis of the first and second embodiments, and other structures and parameters are the same as those of the first and second embodiments, and descriptions of the same or similar parts are omitted.

[0064] In this embodiment, the self-adhesive sanitary product 2 is in the form of a sheet. The sheet-shaped self-adhesive sanitary product 2 is not only easy to adhere to the vaginal opening, but also easy to adhere to the urethral opening. In this way, the urethral contents can be blocked from flowing out.

[0065] The sheet-like self-adhesive sanitary product 2 is preferably the size of a fingernail, for example, a circle with a diameter between 0.5 cm and 2 cm. However, the size and shape are not limited, and can be changed arbitrarily as long as it can be easily adhered to the vaginal opening or urethral opening tissue.

[0066] Fourth embodiment

[0067] In the first to third embodiments, an octopus-like structure is cited as a micro-nano array structure, but it is not limited to this. Any micro-nano array structure that can achieve reversible wet adhesion and is used to adhere to the vaginal opening or urethral opening tissue can be applied to the present utility model. In the fourth embodiment, other micro-nano array structures are described, and other structures and parameters are the same as those in the first and second embodiments, and the description of the same or similar parts is omitted. In addition, it can be understood that a variety of micro-nano array structures that can achieve reversible wet adhesion and are used to adhere to the vaginal opening or urethral opening tissue can be arranged together on the surface of the self-adhesive sanitary product 2 to work together.

[0068] The micro-nano array structure may include a mechanical interlocking structure, in which the micro-nano array structure on the surface of the self-adhesive sanitary product 2 forms a complementary structure with the tissue surface. The topological restriction at the interlocking point increases the separation resistance between the self-adhesive sanitary product 2 and the vaginal or urethral opening tissue, thereby increasing the adhesion effect.

[0069] Mechanical interlocking structures can be exemplified by micro-nano array structures for skin adhesion based on microneedles, including but not limited to micro-nano array structures of microneedles that can be used for adhesion based on sea anemone tentacles, beetle tentacles, gecko foot pads, creeper suction cups, etc.

[0070] Fifth embodiment

[0071] The fifth embodiment is based on the first to fourth embodiments, with the addition of a drug-loaded sustained-release layer. Other structures and parameters are the same as those of the first to fourth embodiments, and descriptions of the same or similar parts are omitted.

[0072] By providing a drug-loaded sustained-release layer on the surface of the self-adhesive sanitary product 2, when the self-adhesive sanitary product 2 adheres to the tissue of the vaginal opening or urethral opening, the drug is slowly released into the vagina or urethra, so that the corresponding disease can be treated according to the provided drug.

[0073] The drug-loaded sustained-release layer can be formed by directly applying the drug to at least a portion of the surface of the self-adhesive sanitary product 2 .

[0074] It is easy for a person skilled in the art to understand that any elements in the first to fifth embodiments described above can be freely combined as long as the effects of the present invention can be achieved.

[0075] When the self-adhesive sanitary product 2 is adhered to the vaginal opening or urethral opening tissue, the self-adhesive sanitary product 2 completely blocks the vaginal opening or urethral opening to prevent the contents of the vagina or urethra from flowing out, thereby preventing menstruation from flowing out during the menstrual period of women, and preventing urine from overflowing at any time in patients with urinary incontinence when they cannot decide the urination time independently. In addition, the self-adhesive sanitary product 2 is removed regularly according to the actual situation during use to discharge menstruation or urine from the body. After removal, a new or secondary sterilized self-adhesive sanitary product can be replaced for health needs.

[0076] Preparation method of self-adhesive sanitary products

[0077] The self-adhesive sanitary product of the utility model can be prepared through the following steps.

[0078] i. Preparation of the substrate layer: obtaining a sheet-like or finger-shaped substrate layer membrane by 3D printing or electrospinning or hot pressing or UV curing;

[0079] ii. Preparation of a surface adhesive layer: obtaining a sheet-shaped or finger-shaped surface adhesive layer film by 3D printing or using a mold having a micro-nano array structure;

[0080] iii. Composite the surface adhesive layer and the base layer: The interface of the sheet-shaped or finger-shaped surface adhesive layer film and the sheet-shaped or finger-shaped base layer film of a suitable shape is bonded to obtain an interface adhesive;

[0081] iv. The interface adhesive is formed into a sheet or finger sleeve shape of a predetermined size by punching and / or bonding.

[0082] In step i, for example, a hydrogel fiber membrane can be obtained by electrospinning from a composite solution (pH = 5-6) of chitosan (mass fraction 1%) and sodium alginate (mass fraction 2%), or a biomedical polyurethane pellet is hot-pressed at 150-200 degrees, preferably at 180 degrees, to obtain a film.

[0083] In step ii, for example, a mold for obtaining a micro-nano array structure of a surface adhesion layer can be prepared by 3D printing or photolithography technology, and the mold can be used to obtain a film by hot pressing or UV curing. More specifically, a mixed solution of methacrylated gelatin (mass fraction 20%) and methacrylated sodium alginate (mass fraction 2%) can be applied to the mold, and after removing bubbles in the mixed solution of methacrylated gelatin and sodium methacrylated alginate under vacuum, the mixed solution of methacrylated gelatin and sodium methacrylated alginate is UV-cured, and the mixture of methacrylated gelatin and sodium methacrylated alginate obtained after curing the mixed solution of methacrylated gelatin and sodium methacrylated alginate is demoulded to obtain a surface adhesion layer. In addition, the pellets of biomedical polyurethane can also be placed on a mold, heated at 150-200 degrees, preferably heated at 180 degrees, and applied with a pressure of 0.3-3MPa, preferably 1MPa, and demolded after cooling and solidification to obtain a surface adhesion layer.

[0084] In step iv, for example, the interface adhesive can be punched into two finger-shaped sheet materials, and then the base layers of the two finger-shaped sheet materials are adjacent to each other, and the peripheral parts of the remaining parts except the base of the finger are bonded to form a finger sleeve shape, or the interface adhesive can be punched into a circular sheet with a radius between 0.5 cm and 2 cm.

[0085] In addition, the utility model can also use 3D printing to directly shape self-adhesive sanitary products. In this method, the printing ink can include methacrylated modified gelatin, sodium alginate, gellan gum, chitosan, carboxymethyl cellulose raw materials and their compositions, and the concentration is 10-20% aqueous solution; then, the printed self-adhesive sanitary products are placed in a 1mol / L CaCl2 aqueous solution and soaked for 2 hours to improve the hydrogel network and further enhance the toughness of the self-adhesive sanitary products. When using 3D printing, the printed thickness is usually more suitable at more than 250μm.

[0086] In addition, the preparation method of the finger-tip-shaped self-adhesive sanitary product with a multi-layer structure can also borrow the method of latex glove molding, first immersing the finger-tip-shaped mold into a liquid composed of the material for preparing the surface adhesive layer, and after the immersion, the mold leaves the liquid surface, and the surface adhesive layer is obtained by ultraviolet curing; then, the mold including the prepared surface adhesive layer is immersed in a liquid composed of the material for preparing the base layer, and after the immersion, the mold leaves the liquid surface, and the base layer is further obtained by ultraviolet curing. Finally, demolding is performed to obtain the finger-tip-shaped self-adhesive sanitary product.

[0087] It is understandable that the above preparation method only cites some materials, and those skilled in the art can select other materials and adopt the above preparation method according to actual conditions.

[0088] Without departing from the spirit of the present invention, various technical features of the above-mentioned different embodiments may also be used in combination.

[0089] The above is a detailed introduction to the present application. For a person skilled in the art, based on the ideas of the embodiments of the present application, changes in the specific implementation methods and application scope should not be considered as deviations from the scope of protection of the present application. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A self-adhesive sanitary product, characterized in that: The self-adhesive sanitary product is in the shape of a finger sleeve or a sheet, and has a first surface located on the surface side and a second surface located on the opposite side of the first surface. The self-adhesive sanitary product has a micro-nano array structure on the first surface that can achieve reversible wet adhesion and is used to adhere to the vaginal opening or urethral opening tissue. The self-adhesive sanitary product is breathable and liquid-impermeable. When the self-adhesive sanitary product is adhered to the vaginal opening or urethral opening tissue, the self-adhesive sanitary product completely blocks the vaginal opening or urethral opening, thereby preventing the contents of the vagina or urethra from flowing out. The wet adhesion strength of the self-adhesive sanitary product is 10-100 kPa.

2. The self-adhesive sanitary product according to claim 1, characterized in that: The self-adhesive sanitary product comprises a base layer and a surface adhesive layer, wherein the base layer provides mechanical support for the surface adhesive layer, and the surface adhesive layer has the micro-nano array structure on the first surface.

3. The self-adhesive sanitary product according to claim 1 or 2, characterized in that: The micro-nano array structure comprises an octopus-like structure, which has a plurality of suction cups, wherein the outer diameter of the suction cups is 20-500 μm, the inner diameter of the suction cups is 10-300 μm, the height of the suction cups is 10-200 μm, and the spacing between the outer diameters of the suction cups is 0.5-2 times of the inner diameter of the suction cups.

4. The self-adhesive sanitary product according to claim 3, characterized in that: The outer diameter of the suction cup is 100-200 μm, the inner diameter of the suction cup is 50-150 μm, and the height of the suction cup is 30-100 μm.

5. The self-adhesive sanitary product according to claim 1 or 2, characterized in that: The thickness of the self-adhesive sanitary product in the shape of the finger sleeve is 0.1-0.5 mm, the length is 1-3 cm, and the diameter of the open end of the finger sleeve is 1.2-2 cm; The sheet-shaped self-adhesive sanitary product has a thickness of 0.1-0.5 mm and is formed to a size that can completely block the vaginal opening or the urethral opening.

6. The self-adhesive sanitary product according to claim 2, characterized in that: The thickness of the base layer is 90-300 μm, the thickness of the surface adhesive layer is 10-200 μm, and the thickness of the base layer is thicker than that of the surface adhesive layer.

7. The self-adhesive sanitary product according to claim 1 or 2, characterized in that: The self-adhesive sanitary product has a modulus of 10-100 kPa and a breaking stress of 1-10 MPa.

8. The self-adhesive sanitary product according to claim 1 or 2, characterized in that: The first surface of the self-adhesive sanitary product is provided with a drug-carrying sustained-release layer. When the self-adhesive sanitary product is adhered to the vaginal opening or urethral opening tissue, the drug is sustained-released into the vagina or urethra.

9. The self-adhesive sanitary product according to claim 3, characterized in that: At least a portion of the suction cup in the height direction has an elastic folding portion. In the absence of external force, the elastic folding portion is in a naturally extended state. In the presence of external force, the elastic folding portion can be compressed and folded.

10. The self-adhesive sanitary product according to claim 1 or 2, characterized in that: The micro-nano array structure also includes a mechanical interlocking structure as a complementary structure that forms an interlocking engagement with the tissue surface of the vaginal or urethral opening tissue on the first surface.

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