A circular contraceptive patch

Abstract

The present application relates to a kind of pasting type circular contraceptive patch, including backing layer, the bottom of the backing layer is provided with attachment layer, the bottom of the attachment layer is provided with release layer, two backing tear tabs are provided on the backing layer, the attachment layer is provided with the storage part of folding, the upper surface of the attachment layer is provided with attachment adhesive part, the upper surface of the release layer is provided with release adhesive part, the two sides of the release layer are provided with release tear tab.The pasting type circular contraceptive patch, through the cooperation of backing tear tab and release tear tab three-layer structure, realize whole contactless wearing, completely eliminate lubricant dirty hand and slip, reactive thermoplastic polyurethane film elasticity adapts to human profile, cooperate annular paste and central storage part, eliminate the tight feeling of traditional condom, polyurethane physical barrier realizes physical isolation protection, three-eighth equal-area annular adhesive layer design, synchronous realization even adhesion, waterproof seal and storage part free expansion.

Description

Technical Field

[0001] This invention relates to the field of family planning products technology, specifically to an adhesive circular contraceptive patch. Background Technology

[0002] Family planning products are used for family planning, contraception, and reproductive health maintenance. They can be mainly divided into barrier and external contraceptives, hormonal and long-acting contraceptives, testing and assisted contraceptives, and permanent contraceptives. Barrier and external contraceptives include male condoms, female condoms, and external spermicides. The components of male condoms are mainly divided into two categories: the main material and the surface additives. The main material is natural latex, polyurethane, or polyisoprene, while the surface additives are lubricants, barrier powders, or functional additives.

[0003] Currently, most family planning products, including barrier and external contraceptives, are condoms. When using them, the outer plastic packaging needs to be torn open. To ensure comfort, both the surface and inner wall of the condom are coated with a medical-grade lubricant, which easily sticks to the hands during application. Furthermore, the condom is initially rolled up; it needs to be placed on the glans penis and then rolled up towards the base of the penis. Because of the lubricant on both hands and the condom, slippage occurs during application, and there is a strong feeling of constriction after application, significantly affecting the experience. Therefore, a circular adhesive contraceptive patch is proposed to solve these problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an adhesive circular contraceptive patch, which is convenient to wear and highly comfortable. It solves the problems associated with traditional contraceptives, such as the barrier effect of condoms, which require tearing open the plastic packaging and have a medical-grade lubricant on both the surface and inner wall to ensure comfort. This lubricant easily sticks to the hands during application. Furthermore, the initial rolled-up state of the condom requires placing it on the glans penis and then unrolling it towards the base of the penis. The lubricant on both hands and the condom causes slippage during application and a strong feeling of constriction, significantly impacting the user experience.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adhesive circular contraceptive patch, comprising a backing layer, an adhesive layer at the bottom of the backing layer, and a release layer at the bottom of the adhesive layer; The backing layer has two symmetrically distributed backing tear ears, and the backing layer and the backing tear ears are an integral structure. The adhesive layer has a folded semen storage part, which is located at the center of the adhesive layer. The upper surface of the adhesive layer has an adhesive part for bonding with the backing layer, and the adhesive part is annular. The upper surface of the release layer is provided with a release adhesive portion for bonding with the adhesive layer, and the release adhesive portion is annular. The two sides of the release layer are provided with two symmetrically distributed release tabs, and the release layer and the two release tabs are an integral structure.

[0006] Furthermore, the backing layer is a flexible backing film, the adhesive layer is a polyurethane film, and the release layer is release paper.

[0007] Furthermore, both the bottom of the adhesive layer and the backing layer are provided with a waterproof pressure-sensitive adhesive layer, and the adhesive part is provided with a medical micro-peeling silicone oil coating.

[0008] Furthermore, the waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer is a medical-grade high-polymer polyacrylate pressure-sensitive adhesive applied in a circular pattern. The waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer has the same area and shape as the release adhesive portion. The waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer is a low-tack medical-grade acrylic pressure-sensitive adhesive applied in a circular pattern. The adhesive portion has the same area and shape as the waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer.

[0009] Furthermore, the area of ​​the adhesive part is three-quarters of the area of ​​the upper surface of the adhesive layer, and the area of ​​the release adhesive part is three-quarters of the area of ​​the upper surface of the release layer.

[0010] Furthermore, the components of the medical-grade high-molecular-weight polyacrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, aluminum acetylacetonate, silane coupling agent, thermal initiator, and ethyl acetate.

[0011] Furthermore, the components of the low-viscosity medical acrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, vinyl acetate, hydroxyethyl acrylate, hydrogenated C9 petroleum resin, hydrophobic fumed silica, silane coupling agent, UV photoinitiator, and ethyl acetate.

[0012] Furthermore, the polyurethane film is selected as a reactive thermoplastic polyurethane film, and the components of the reactive thermoplastic polyurethane film are polytetrahydrofuran ether diol, hexamethylene diisocyanate, BDO, and dimethylolpropionic acid.

[0013] Compared with the prior art, the present invention provides an adhesive circular contraceptive patch, which has the following beneficial effects: 1. This adhesive circular contraceptive patch features an integrated symmetrical structure with a backing tear tab and a release tear tab, combined with a three-layer composite backing layer, adhesive layer, and release layer step-by-step peeling mechanism. This allows for clean wearing without contact with the adhesive layer or lubricant. Throughout the process, the user's fingers only come into contact with the dedicated tear tab structure, completely avoiding the slippage and sticky issues caused by the all-over application of lubricant on traditional condoms. 2. This adhesive circular contraceptive patch uses a reactive thermoplastic polyurethane film as the adhesive layer, which has excellent flexibility, high elasticity and hydrolysis resistance. It can perfectly fit the complex contour curve of the glans penis area. At the same time, the adhesive layer is only attached to the glans penis with a circular medical-grade high-molecular-weight polyacrylate pressure-sensitive adhesive. The central area is a folded sperm reservoir, and most of the penile body is not covered, achieving a comfortable wearing experience and further improving the user experience. 3. This adhesive circular contraceptive patch uses medical-grade high-molecular-weight polyacrylate pressure-sensitive adhesive on the lower surface of the adhesive layer. The substrate of the adhesive layer is made of dimethylolpropionic acid, and its side-mounted carboxyl groups form interfacial covalent bonds with functional groups such as silane coupling agents and acrylic acid in the adhesive layer, completely eliminating the risk of delamination. The lower surface of the backing layer uses low-tack medical acrylic pressure-sensitive adhesive. The vinyl acetate component in its composition has moderate polarity and excellent interfacial compatibility with the medical micro-peeling silicone oil coating of the adhesive part, achieving low-value, stable and clean peel force. 4. This adhesive circular contraceptive patch features a circular adhesive layer with equal area and shape at key bonding interfaces. This allows the pressure stress to be evenly distributed along the circumference during adhesion, preventing edge lifting and detachment caused by localized stress concentration. The fully closed circular adhesive layer forms a reliable waterproof barrier between the glans penis and the adhesive layer, effectively preventing leakage of bodily fluids. The precisely reserved quarter-inch adhesive-free area in the center provides ample and unrestricted space for the semen storage compartment to unfold, ensuring that the folded structure can fully and smoothly unfold when receiving semen. This achieves seamless and coordinated operation of the three functions: adhesion and fixation, waterproof sealing, and semen storage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the novel structure of the present invention; Figure 2 This is a schematic diagram of the novel structure of the present invention. Figure 1 Exploded view; Figure 3 This is a schematic diagram showing the unfolded structure of the attachment layer of the present invention; Figure 4 This is a schematic diagram showing the usage state of the novel structural attachment layer of the present invention.

[0015] In the diagram: 1. Backing layer; 11. Backing tear; 2. Adhesive layer; 21. Semen storage section; 22. Adhesive part; 3. Release layer; 31. Release adhesive part; 32. Release tear. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0017] Example 1: Please refer to Figure 1-4 In this embodiment, an adhesive circular contraceptive patch includes a backing layer 1, an adhesive layer 2 at the bottom of the backing layer 1, and a release layer 3 at the bottom of the adhesive layer 2.

[0018] Example 2: Please refer to Figure 1-4 Based on Embodiment 1, the backing layer 1 is provided with two symmetrically distributed backing tear ears 11, and the backing layer 1 and the backing tear ears 11 are an integral structure. The adhesive layer 2 is provided with a folded semen storage part 21, and the semen storage part 21 is located at the center of the adhesive layer 2. The upper surface of the adhesive layer 2 is provided with an adhesive part 22 for bonding with the backing layer 1, and the adhesive part 22 is annular. The upper surface of the release layer 3 is provided with a release adhesive portion 31 for bonding with the adhesive layer 2, and the release adhesive portion 31 is annular. The two sides of the release layer 3 are provided with two symmetrically distributed release tabs 32, and the release layer 3 and the two release tabs 32 are an integral structure.

[0019] It should be noted that by tearing off the release layer 3, attaching the adhesive layer 2 to the glans, and then tearing off the backing layer 1, it is easier to wear and thus improves the user experience. The one-piece backing tear tab 11 and release tear tab 32 can be easily torn without the need for tools, avoiding liquid or glue from getting on the hands. The central folded semen storage part 21 provides space for semen storage, and the annular adhesive part 22 and release adhesive part 31 adhere evenly, solving the problem of traditional condoms requiring unrolling and rolling to wear, and avoiding the slippage caused by lubricant on the hands.

[0020] Among them, the backing layer 1 is a flexible backing film, the adhesive layer 2 is a polyurethane film, and the release layer 3 is release paper.

[0021] It should be noted that the release paper 3 effectively isolates the adhesive layer 2, preventing the product from being pre-adheded during storage and improving storage stability. The adhesive layer 2 can adapt to the irregular shape of the glans penis to achieve wrapping.

[0022] In addition, the bottom of both the adhesive layer 2 and the backing layer 1 is provided with a waterproof pressure-sensitive adhesive layer, and the adhesive part 22 is provided with a medical micro-peeling silicone oil coating.

[0023] It should be noted that the waterproof pressure-sensitive adhesive layer ensures waterproofing and prevents detachment after application, while the silicone oil coating reduces the adhesion between the backing layer 1 and the adhesive layer 2, ensuring that the backing layer 1 is easy to remove and preventing adhesive residue from remaining on the surface of the adhesive layer 2 after removal.

[0024] Furthermore, the waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer 2 is a medical-grade high-polymer polyacrylate pressure-sensitive adhesive applied in a circular pattern. The waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer 2 has the same area and shape as the release adhesive portion 31. The waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer 1 is a low-tack medical-grade acrylic pressure-sensitive adhesive applied in a circular pattern. The adhesive portion 22 has the same area and shape as the waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer 1.

[0025] It should be noted that the medical-grade high-density polyacrylate pressure-sensitive adhesive ensures that the adhesive layer 2 adheres firmly to the glans penis, and the adhesive layer remains intact and undamaged when the release layer 3 is removed. The low-tack medical acrylic pressure-sensitive adhesive ensures that the backing layer 1 is easy to remove. The circular adhesive design with the same area and shape allows for even distribution of adhesion force and also avoids the risk of the adhesive layer 2 peeling off or falling off.

[0026] In addition, the area of ​​the adhesive part 22 is three-quarters of the area of ​​the upper surface of the adhesive layer 2, and the area of ​​the release adhesive part 31 is three-quarters of the area of ​​the upper surface of the release layer 3.

[0027] It should be noted that the three-quarters adhesive area balances adhesion strength and semen storage space, ensuring that the adhesive layer 2 is firmly attached while allowing the central folded semen storage section 21 to unfold freely. The adhesive function and the semen storage function do not interfere with each other, avoiding the problem that the semen storage section 21 cannot unfold properly due to excessive adhesive area, or that the adhesion is not firm due to insufficient adhesive area.

[0028] Example 3: Please refer to Figure 1-4 Based on Example 2, the components of the medical-grade high internal polyacrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, aluminum acetylacetonate, silane coupling agent, thermal initiator, and ethyl acetate.

[0029] It should be noted that the components of the medical-grade high-molecular-weight polyacrylate pressure-sensitive adhesive can be selected in the following mass ratio: 60-75 parts of 2-ethylhexyl acrylate, 15-25 parts of methyl methacrylate, 4-8 parts of acrylic acid, 0.5-1.5 parts of aluminum acetylacetonate, 0.3-1 part of silane coupling agent, 0.1-0.5 parts of thermal initiator, and an appropriate amount of ethyl acetate; 2-Ethylhexyl acrylate, as a soft monomer, provides basic adhesion and flexibility, accounting for 60-75 parts to ensure that the adhesive layer can be fully wetted and adhered to the skin surface. Methyl methacrylate, as a hard monomer, provides a cohesive framework, accounting for 15-25 parts to establish sufficient shear strength and prevent the adhesive layer from undergoing cohesive failure under dynamic deformation. Medical-grade high-polymer polyacrylate pressure-sensitive adhesive has high cohesive strength and high water resistance, making it difficult to fall off after application. The medical-grade components are non-irritating to the skin and suitable for use on intimate areas of the body, ensuring both safety and adhesion.

[0030] The components of the low-viscosity medical acrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, vinyl acetate, hydroxyethyl acrylate, hydrogenated C9 petroleum resin, hydrophobic fumed silica, silane coupling agent, UV photoinitiator, and ethyl acetate.

[0031] It should be noted that the components of the low-viscosity medical acrylic pressure-sensitive adhesive can be selected from the following parts by weight ratio: 70-85 parts of 2-ethylhexyl acrylate, 10-20 parts of vinyl acetate, 1-3 parts of hydroxyethyl acrylate, 5-12 parts of hydrogenated C9 petroleum resin, 1-3 parts of hydrophobic fumed silica, 0.2-0.6 parts of silane coupling agent, 0.1-0.4 parts of UV photoinitiator, and an appropriate amount of ethyl acetate; 2-Ethylhexyl acrylate, as the main soft monomer, accounts for 70-85 parts, giving the adhesive layer soft and low modulus properties, ensuring stable and controllable force during peeling. Vinyl acetate, as the auxiliary hard monomer, accounts for 10-20 parts, providing moderate skeleton strength. Its polarity is moderate, and it has good interfacial compatibility with the medical micro-peeling silicone oil coating on the upper surface of the adhesion layer 2. It will not produce excessive interfacial adhesion due to excessive polarity. Hydroxyethyl acrylate, as a weakly polar functional monomer, accounts for 1-3 parts, providing mild crosslinking points and backing film anchoring points, but does not significantly increase adhesion.

[0032] The low-viscosity medical acrylic pressure-sensitive adhesive features low viscosity and high peel stability. The backing layer 1 is easier to remove, leaving no adhesive residue and not affecting the adhesion layer 2. The hydrophobic components enhance water resistance, and the medical-grade material is non-irritating.

[0033] In addition, the polyurethane film is a reactive thermoplastic polyurethane film, and the components of the reactive thermoplastic polyurethane film are polytetrahydrofuran ether diol, hexamethylene diisocyanate, BDO, and dimethylolpropionic acid.

[0034] It should be noted that the components of the reactive thermoplastic polyurethane film can be selected in the following mass ratio: 100 parts of polytetrahydrofuran ether diol, 28-32 parts of hexamethylene diisocyanate, 12 parts of 1,4-butanediol, 1.5-3.0 parts of dimethylolpropionic acid, appropriate amount of neutralizing agent, 0.01-0.05 parts of dibutyltin dilaurate, and appropriate amount of N,N-dimethylformamide; In this formulation system, polytetrahydrofuran ether diol with a molecular weight of 2000 is selected and accounts for 100 parts as the base soft segment, giving the film excellent flexibility, high elasticity and hydrolysis resistance, which can perfectly fit the complex contour curve of the human penis glans area, without tightness or restraint after application. Hexamethylene diisocyanate, as an aliphatic diisocyanate, accounts for 28-32 parts and provides the hard segment structure, ensuring that the film has excellent resistance to yellowing, transparency and biocompatibility. 1,4-Butanediol, as a chain extender, accounts for 10-12 parts and together with HDI, forms regular hard segment micro-regions, providing the film with the necessary tensile strength and tear resistance.

[0035] Reactive thermoplastic polyurethane film is flexible and adaptable to the human body contour, so that there is no tightness or restraint after application. At the same time, it has excellent physical barrier properties, which not only ensures the contraceptive effect but also greatly improves comfort.

[0036] The working principle of the above embodiments is as follows: When using this adhesive circular contraceptive patch, hold the integrated release tabs 32 on both sides of the release layer 3 and tear it outwards. The release adhesive part 31 of the release layer 3 adheres to the medical-grade high-molecular-weight polyacrylate pressure-sensitive adhesive layer on the lower surface of the adhesive layer 2. Relying on the isolation properties of the release paper and the compatibility of the pressure-sensitive adhesive, the waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer 2 is completely preserved during the tearing process without damage or transfer, and does not affect the subsequent adhesive function. Align the folded semen storage part 21 at the center of the adhesive layer 2 with the tip of the glans penis, and stick the complete waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer 2 to the surface of the glans penis. The annular release adhesive part 31 achieves uniform force adhesion in the corresponding area, and firmly fixes the adhesive layer 2 to the glans penis. Hold the integrated backing tabs 11 on both sides of the backing layer 1 and tear them outwards. The lower surface of the backing layer 1 is a low-tack medical acrylic pressure-sensitive adhesive layer, and the adhesive part 22 of the attachment layer 2 is provided with a medical micro-peeling silicone oil coating. At the same time, the adhesion strength between the attachment layer 2 and the glans penis is much greater than the adhesion strength between the backing layer 1 and the attachment layer 2. After tearing off the backing layer 1, there is no waterproof pressure-sensitive adhesive residue on the attachment layer 2. The reactive thermoplastic polyurethane film of the attachment layer 2 forms a physical barrier, and the centrally folded sperm storage part 21 unfolds under force to receive semen, achieving physical isolation to ensure contraceptive effect.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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.

Claims

1. An adhesive circular contraceptive patch, comprising a backing layer (1), characterized in that: The backing layer (1) has an adhesive layer (2) at the bottom, and the adhesive layer (2) has a release layer (3) at the bottom. The backing layer (1) is provided with two backing tear ears (11) that are symmetrically distributed, and the backing layer (1) and the backing tear ears (11) are an integral structure. The adhesive layer (2) is provided with a folded semen storage part (21), and the semen storage part (21) is located at the center of the adhesive layer (2). The upper surface of the adhesive layer (2) is provided with an adhesive part (22) for bonding with the backing layer (1), and the adhesive part (22) is annular. The upper surface of the release layer (3) is provided with a release adhesive part (31) for bonding with the adhesive layer (2), and the release adhesive part (31) is annular. The two sides of the release layer (3) are provided with two symmetrically distributed release tabs (32), and the release layer (3) and the two release tabs (32) are an integral structure.

2. The adhesive circular contraceptive patch according to claim 2, characterized in that: The backing layer (1) is a flexible backing film, the adhesive layer (2) is a polyurethane film, and the release layer (3) is a release paper.

3. The adhesive circular contraceptive patch according to claim 3, characterized in that: The bottom of both the adhesive layer (2) and the backing layer (1) is provided with a waterproof pressure-sensitive adhesive layer, and the adhesive part (22) is provided with a medical micro-peeling silicone oil coating.

4. The adhesive circular contraceptive patch according to claim 1, characterized in that: The waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer (2) is a medical-grade high-polymer polyacrylate pressure-sensitive adhesive applied in a circular pattern. The waterproof pressure-sensitive adhesive layer on the lower surface of the adhesive layer (2) has the same area and shape as the release adhesive part (31). The waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer (1) is a low-viscosity medical acrylic pressure-sensitive adhesive applied in a circular pattern. The adhesive part (22) has the same area and shape as the waterproof pressure-sensitive adhesive layer on the lower surface of the backing layer (1).

5. The adhesive circular contraceptive patch according to claim 5, characterized in that: The area of ​​the adhesive part (22) is three-quarters of the area of ​​the upper surface of the adhesive layer (2), and the area of ​​the release adhesive part (31) is three-quarters of the area of ​​the upper surface of the release layer (3).

6. The adhesive circular contraceptive patch according to claim 1, characterized in that: The components of the medical-grade high-polymer polyacrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, aluminum acetylacetonate, silane coupling agent, thermal initiator, and ethyl acetate.

7. The adhesive circular contraceptive patch according to claim 1, characterized in that: The components of the low-viscosity medical acrylate pressure-sensitive adhesive include 2-ethylhexyl acrylate, vinyl acetate, hydroxyethyl acrylate, hydrogenated C9 petroleum resin, hydrophobic fumed silica, silane coupling agent, UV photoinitiator, and ethyl acetate.

8. The adhesive circular contraceptive patch according to claim 1, characterized in that: The polyurethane film is selected as a reactive thermoplastic polyurethane film, and the components of the reactive thermoplastic polyurethane film are polytetrahydrofuran ether diol, hexamethylene diisocyanate, BDO, and dimethylolpropionic acid.

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