Safe sanitary towel with broken glue design

By incorporating a 4cm blank area and fan-shaped side wings into the sanitary napkin design, combined with specific materials and structures, the problems of adhesive residue and shape misfit are solved, resulting in a more environmentally friendly, comfortable, and stable sanitary napkin user experience.

CN224193663UActive Publication Date: 2026-05-05KUNSHAN YARI SANITARY PROD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
KUNSHAN YARI SANITARY PROD CO LTD
Filing Date
2025-02-13
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

Existing sanitary napkins generate a lot of waste during production or use, and the overall adhesive design can easily leave adhesive residue on underwear, causing skin allergies or infections. In addition, the shape design does not fit the human body well and is prone to shifting.

Method used

Design a safe adhesive-free sanitary napkin with a 4cm blank area on the back of the main body and fan-shaped side wings that fit the crotch area of ​​the human body. The main body consists of a top layer, a diversion layer, a composite layer, and a PE breathable bottom film layer. The surface of the diversion layer has raised grooves, and the surface of the composite layer has an uneven structure. The outer protective film is made of the same material as the PE breathable bottom film layer. The side wings are covered by the main body and side wings through a folding structure to form an integrated connection.

Benefits of technology

It reduces adhesive residue, improves absorption speed and fit, lowers the risk of bacterial infection, reduces waste, enhances comfort and stability, prevents shifting, and maintains hygiene in intimate areas.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of female hygienic products, in particular to a sanitary towel with safe broken glue design, which comprises a main body and side wings, the side wings are positioned at two ends of the main body and are integrally connected with the main body, one side of the main body is adhered and connected with an outer protective film, and one side of the outer protective film corresponding to the main body is provided with a main body film. And side wing films are adhered to the outer walls of the side wings. According to the improved sanitary towel, the blank area of 4 cm is arranged on the back glue of the main body, so that the possibility that the glue in the middle part is left on underpants is reduced, and the situation that the residual glue adsorbs secretions, sweat breeds bacteria, and private part infection and discomfort are caused is avoided; waste materials generated in the unsealing, unfolding and using processes of the sanitary towel are more concentrated, the number of the waste materials is reduced, potential pollution of the waste materials to the environment is reduced from the source, and all the layers in the main body jointly achieve the functions of comfort, efficient absorption, leakage prevention and the like of the sanitary towel through cooperative work of specific materials, unique structures and tight connection.
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Description

Technical Field

[0001] This utility model relates to the field of feminine hygiene products technology, specifically a sanitary napkin with a safe adhesive-break design. Background Technology

[0002] Feminine hygiene products refer to a series of products specifically designed and manufactured to meet the physiological characteristics and hygiene needs of women. They are mainly used by women during different physiological stages, such as menstruation, pregnancy, postpartum, and daily intimate care.

[0003] Sanitary napkins are the main hygiene products used by women during their menstrual period. They are primarily used to absorb menstrual blood to keep the body clean and comfortable and to prevent clothing from getting soiled.

[0004] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: 1. Existing sanitary napkins generate a lot of waste during production or use, which is not environmentally friendly. Moreover, the overall adhesive design makes it easy for the adhesive to remain on underwear. The remaining adhesive may absorb secretions, sweat, etc., breed bacteria, and cause skin allergies or infections; 2. Some existing sanitary napkins are not shaped to fit the human body well. They are prone to shifting during use or cannot adapt well to body activities, resulting in discomfort. Utility Model Content

[0005] The purpose of this utility model is to provide a sanitary napkin with a safe adhesive-free design, to solve the problem mentioned in the background art where the overall adhesive design easily leads to adhesive residue on underwear, causing skin allergies or infections. To achieve the above objective, this utility model provides the following technical solution: a sanitary napkin with a safe adhesive-free design, comprising a main body and side wings, wherein the side wings are located at both ends of the main body and are integrally connected thereto, an outer protective film is adhesively connected to one side of the main body, a main body film is disposed on the side of the outer protective film corresponding to the main body, and a side wing film is adhesively bonded to the outer wall of the side wings.

[0006] The main body is composed of a surface layer, a flow guiding layer, a composite layer, a water-locking layer, and a PE breathable bottom membrane layer. The surface layer and the PE breathable bottom membrane layer are bonded together as one unit, and the flow guiding layer, the composite layer, and the water-locking layer are located between the surface layer and the PE breathable bottom membrane layer. The flow guiding layer, the composite layer, and the water-locking layer are sequentially and tightly bonded together as one unit.

[0007] More preferably, the surface layer is made of pure cotton and the flow guiding layer is made of fiber. The surface of the flow guiding layer has raised grooves that protrude into the surface layer. The grooves are elliptical at one end of the surface layer and swallowtail-shaped at the other end.

[0008] More preferably, the composite layer is a two-layer integrated structure consisting of upper and lower layers, and the surface of the composite layer is distributed with uneven raised surfaces, and the surface of the PE breathable bottom film layer is distributed with a microporous structure.

[0009] More preferably, the outer protective film is made of the same material as the PE breathable bottom film layer, and the outer protective film forms a folded structure through its surface creases. The two ends of the outer protective film are bonded together by the adhesive distributed at the edges, and the main body and side wings are covered therein.

[0010] More preferably, the main body film and the outer protective film form an integrated structure, and the main body is coated with an adhesive on one side corresponding to the main body film. The adhesive coverage area is distributed at the upper and lower ends of the main body film, and there is a blank area without adhesive between the upper and lower ends of the adhesive. The blank area has a size of 4cm.

[0011] More preferably, the main body is elongated, with a narrower and rounded front end and a wider rear end than the front end.

[0012] More preferably, the side wings are fan-shaped, and the side wings are folded relative to each other on the surface of the main body through their own creases, and the side wings are bonded together by side wing films.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In this invention, the main adhesive backing has a 4cm blank area, which reduces the possibility of adhesive residue in the middle part remaining on the underwear. This avoids the absorption of secretions and sweat by adhesive residue, which can breed bacteria and cause infection and discomfort in the private area. It also reduces the risk of bacterial infection and inflammation, and better maintains the hygiene environment of the private area. At the same time, the integrated structure of the main film and the outer protective film makes the waste generated during the opening, unfolding and use of the sanitary napkin more concentrated and less in quantity, reducing the potential pollution of the environment from the source.

[0015] In this invention, the side wings are fan-shaped, which can better conform to the curve of the human hip. After being folded back from both sides of the underwear, it fits the body closely. The grooves can act like "drainage channels" and, with their special structure, quickly guide menstrual blood that comes into contact with the surface layer to the lower drainage layer, accelerating the absorption speed and preventing menstrual blood from accumulating in large quantities on the surface layer. Furthermore, its shape can better match the physiological structure of the human body, allowing it to fit the body more closely whether standing, sitting, or exercising, reducing gaps and shifting between the sanitary napkin and the body, and improving comfort and stability. The internal layers of the main body work together through specific materials, unique structures, and tight connections to achieve the functions of comfort, efficient absorption, and leak prevention of the sanitary napkin. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the unfolded structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the front view of the main body structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rear view of the main body structure of this utility model;

[0019] Figure 4 This is a top view of the outer protective membrane structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the main body of this utility model.

[0021] In the diagram: 1. Main body; 101. Surface layer; 102. Diversion layer; 103. Composite layer; 104. Water-locking layer; 105. PE breathable bottom membrane layer; 2. Side wing; 3. Outer protective membrane; 4. Main membrane; 5. Side wing membrane. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 5 This utility model provides a technical solution: a sanitary napkin with a safe adhesive-break design, including a main body 1 and side wings 2. The side wings 2 are located at both ends of the main body 1 and are integrally connected with it. An outer protective film 3 is bonded to one side of the main body 1. A main body film 4 is provided on the side of the outer protective film 3 corresponding to the side of the main body 1. A side wing film 5 is bonded to the outer wall of the side wings 2.

[0024] The main body 1 is composed of a surface layer 101, a flow guiding layer 102, a composite layer 103, a water-locking layer 104, and a PE breathable bottom membrane layer 105. The surface layer 101 and the PE breathable bottom membrane layer 105 are bonded together, and the flow guiding layer 102, the composite layer 103, and the water-locking layer 104 are located between the surface layer 101 and the PE breathable bottom membrane layer 105. The flow guiding layer 102, the composite layer 103, and the water-locking layer 104 are sequentially and tightly bonded together.

[0025] In this embodiment, as Figure 1 and Figure 5As shown, the surface layer 101 is made of pure cotton, and the distribution layer 102 is made of fiber. The surface of the distribution layer 102 has raised grooves that protrude from the surface layer 101. The grooves are elliptical at one end and swallowtail-shaped at the other end of the surface layer 101. The raised grooves on the surface of the distribution layer 102 act like "drainage channels," using a special structure to quickly guide menstrual blood that comes into contact with the surface layer 101 to the distribution layer 102 below, accelerating absorption and preventing menstrual blood from accumulating in the surface layer 101. Furthermore, the shape of the grooves better matches the physiological structure of the human body, allowing for a closer fit to the body whether standing, sitting, or exercising, reducing gaps and shifting between the sanitary napkin and the body, and improving comfort and stability.

[0026] In this embodiment, as Figure 5 As shown, the composite layer 103 is a double-layer integrated structure consisting of upper and lower layers, and the surface of the composite layer 103 is distributed with uneven raised surfaces, while the surface of the PE breathable bottom film layer 105 is distributed with microporous structures. The uneven raised surfaces of the composite layer 103 increase the contact area between the upper and lower layers, which is beneficial for the absorption and transfer of menstrual blood. At the same time, the uneven structure can also increase the fluffiness of the absorbent layer and improve the absorbency. The microporous structures distributed on the surface of the PE breathable bottom film layer 105 allow air to enter and exit freely, so that the inside of the sanitary napkin is in contact with the outside air, and moisture and heat are discharged in time, avoiding stuffiness and discomfort caused by moisture accumulation. This keeps the user's private parts dry, effectively reduces the environment for bacterial growth, lowers the risk of infection, and improves the comfort of use during menstruation.

[0027] In this embodiment, as Figure 1 and Figure 4 As shown, the outer protective film 3 is made of the same material as the PE breathable bottom film layer 105. The outer protective film 3 forms a folded structure through its surface creases, and the two ends of the outer protective film 3 are connected as one piece by adhesive distributed along the edges, covering the main body 1 and the side wings 2. When the sanitary napkin is not in use, the outer protective film 3 acts like a tight protective shield, completely covering the main body 1 and the side wings 2, effectively blocking external dust, bacteria and other pollutants from contacting the sanitary napkin. The two ends of the outer protective film 3 are connected as one piece by adhesive distributed along the edges, ensuring that it will not be accidentally opened before use, maintaining a tight wrap around the sanitary napkin.

[0028] In this embodiment, as Figure 3 and Figure 4As shown, the main body film 4 and the outer protective film 3 form an integrated structure. The main body 1 is coated with an adhesive on one side corresponding to the main body film 4. The adhesive coverage area is distributed at the upper and lower ends of the main body film 4, and there is a blank area without adhesive between the upper and lower ends. The blank area is 4cm in size. The 4cm blank area ensures that the sanitary napkin can be firmly attached to the underwear while reducing the possibility of adhesive residue in the middle part on the underwear. This effectively avoids the creation of conditions for bacterial growth due to the adsorption of secretions, sweat, etc. by adhesive residue, which can lead to infection and discomfort in the private parts. The blank area design reduces this risk and helps maintain the hygienic environment of the private parts, reducing inflammation and other problems caused by bacterial infection. In addition, the integrated structure of the main body film 4 and the outer protective film 3 makes the waste generated during the opening, unfolding and use of the sanitary napkin more concentrated and less numerous.

[0029] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the main body 1 is long and narrow, with a narrower and rounded front end and a wider rear end. This long and narrow design with a narrower front end and a wider rear end better fits the physiological contours of the human body. The narrower and rounded front end can adapt to the narrower front part of the body, while the wider rear end fits the back of the body better. It will not wrinkle or shift due to shape mismatch during use, thus improving comfort and stability.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the side wings 2 are fan-shaped, and the side wings 2 are folded relative to each other on the surface of the main body 1 through their own creases, and the side wings 2 are bonded together by the side wing film 5; the fan-shaped side wings 2 can better fit the curve of the human hip, and after being folded back from both sides of the underwear, the fit with the body is higher, reducing the gap between the sanitary napkin and the body. The side wing film 5 bonds the side wings 2 together, and when not in use, it can prevent external pollutants from contacting the inside of the side wings 2, keeping the side wings 2 clean and hygienic.

[0031] The usage and advantages of this utility model: This sanitary napkin with a safe adhesive-break design operates as follows during use:

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the main body 1 has an overall shape that better conforms to the physiological curves of the human body, allowing it to better adapt to different postures and activities during use, improving comfort and fit. The wider back end helps prevent back leakage. Its surface layer 101 is made of pure cotton, which is soft and skin-friendly, with low skin irritation, effectively reducing the risk of allergies and providing a comfortable and dry contact experience. The grooved shape of the diversion layer 102 not only helps guide menstrual blood to flow quickly into the diversion layer 102, but also disperses menstrual blood on the surface layer 101, preventing local accumulation and improving absorption efficiency. Secondly, the uneven raised surface of the composite layer 103 increases the surface area in contact with the upper and lower layers, helping to better absorb and store menstrual blood, improving the sanitary napkin's absorbency. The water-locking layer 104 is tightly bonded to the diversion layer 102 and the composite layer 103, effectively locking in menstrual blood, preventing backflow, and keeping the surface layer 101 dry, allowing users to enjoy the product without worrying about leakage during activities. The PE breathable bottom film layer 105 is bonded to the surface layer 101 as one piece, preventing menstrual blood from leaking into the bottom layer. While ensuring air circulation, the design reduces stuffiness and improves comfort. The shape of the side wings 2 allows them to fold back from both sides of the underwear, fitting snugly against the edges to effectively prevent side leakage and enhance the sanitary napkin's fixation, preventing it from shifting during use. The main body film 4 and the outer protective film 3 form an integrated structure. After opening the outer protective film 3 and unfolding the main body 1 and side wings 2, the main body film 4 along with the outer protective film 3 can be peeled off. This integrated structure makes the waste generated during opening, unfolding, and use more concentrated and less numerous. Unlike most integrated adhesive backing designs, the main body 1 has an additional 4cm blank area. This design ensures the sanitary napkin adheres firmly to the underwear while reducing the possibility of adhesive residue remaining on the underwear, making it more hygienic and preventing residual adhesive from contacting intimate areas and causing local skin discomfort or even infection. The side wing film 5 adheres to the side wings 2 before being peeled off, ensuring it will not easily come loose when not in use.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sanitary napkin with a safe adhesive-break design, comprising a main body (1) and side wings (2), characterized in that: The side wings (2) are located at both ends of the main body (1) and are integrally connected thereto. An outer protective film (3) is bonded to one side of the main body (1). A main body film (4) is provided on one side of the outer protective film (3) corresponding to the main body (1). A side wing film (5) is bonded to the outer wall of the side wings (2). The main body (1) is composed of a surface layer (101), a flow guiding layer (102), a composite layer (103), a water-locking layer (104), and a PE breathable bottom membrane layer (105). The surface layer (101) and the PE breathable bottom membrane layer (105) are bonded together, and the flow guiding layer (102), the composite layer (103), and the water-locking layer (104) are located between the surface layer (101) and the PE breathable bottom membrane layer (105). The flow guiding layer (102), the composite layer (103), and the water-locking layer (104) are bonded together in sequence. The main body film (4) and the outer protective film (3) form an integrated structure. The main body (1) is coated with a colloid on one side corresponding to the main body film (4). The colloid covers the upper and lower ends of the main body film (4), and there is a blank area without colloid between the upper and lower ends of the colloid. The blank area is 4cm in size.

2. The sanitary napkin with a safe adhesive-break design according to claim 1, characterized in that: The surface layer (101) is made of pure cotton, and the flow guide layer (102) is made of fiber. The surface of the flow guide layer (102) has raised grooves that protrude to the surface layer (101). The grooves are elliptical at one end of the surface layer (101) and swallowtail-shaped at the other end.

3. A sanitary napkin with a safe adhesive-break design according to claim 1, characterized in that: The composite layer (103) is a double-layer integrated structure consisting of upper and lower layers, and the surface of the composite layer (103) is distributed with uneven raised surfaces, and the surface of the PE breathable bottom film layer (105) is distributed with microporous structure.

4. A sanitary napkin with a safe adhesive-break design according to claim 1, characterized in that: The outer protective film (3) is made of the same material as the PE breathable bottom film layer (105), and the outer protective film (3) forms a folded structure through its surface creases. The two ends of the outer protective film (3) are bonded together by the adhesive distributed at the edges, and the main body (1) and the side wings (2) are covered therein.

5. A sanitary napkin with a safe adhesive-break design according to claim 1, characterized in that: The main body (1) is long and narrow, with a narrower front end and a rounded shape, and a wider rear end than the front end.

6. A sanitary napkin with a safe adhesive-break design according to claim 1, characterized in that: The side wings (2) are fan-shaped, and the side wings (2) are folded relative to each other on the surface of the main body (1) through their own creases, and the side wings (2) are bonded together by the side wing membrane (5).