A side leakage prevention sanitary napkin based on an integrated process
The anti-leakage sanitary napkin, designed with an integrated molding process, uses elastic bands to pull up the overlapping and reverse wrapping areas to form a three-dimensional protective structure. This solves the problem of skin damage and collapse caused by the three-dimensional protective structure, achieving a non-damaging and effective anti-leakage effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN KAYSON HYGIENE PROD CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-29
AI Technical Summary
In existing sanitary napkin products, the three-dimensional protective structure can easily cut the user's skin or fall over, and cannot effectively prevent liquid leakage.
This leak-proof sanitary napkin, designed with a one-piece molding process, includes a middle surface layer, side surface layers, and elastic bands. The elastic bands pull up the overlapping and reverse wrapping areas to form a three-dimensional protective structure, preventing the material from directly contacting the skin and increasing the height to prevent side leakage.
It achieves the effect of preventing skin damage and effectively preventing side leakage, while maintaining a good user experience.
Smart Images
Figure CN224292089U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sanitary products technology, and in particular to a leak-proof sanitary napkin based on an integrated molding process. Background Technology
[0002] To prevent leakage, existing sanitary napkins often feature a three-dimensional protective structure along both sides. This structure prevents leakage from the left or right side, providing superior safety. However, in current sanitary napkins, this structure is vertically attached to the surface of the napkin body using hot melt adhesive. If the material used for the protective structure is too rigid, it can easily cut the user's skin, causing discomfort; if the material is too soft, the structure is prone to collapsing, failing to provide adequate leakage prevention. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a leak-proof sanitary napkin based on a one-piece molding process.
[0004] The solution to the technical problem of this utility model is:
[0005] A leak-proof sanitary napkin based on a one-piece molding process, comprising:
[0006] Middle surface layer;
[0007] The side surface layer includes an integrally formed extension area, a overlapping area, and a reverse wrapping area. The extension area is located outside the middle surface layer and extends to the left or right edge of the middle surface layer. The overlapping area and the reverse wrapping area extend in the front-back direction, respectively. The two sides of the overlapping area extending in the front-back direction are connected to one of the sides of the extension area and the reverse wrapping area extending in the front-back direction, respectively. The other side of the reverse wrapping area extending in the front-back direction is connected to the middle surface layer. The front and rear ends of the reverse wrapping area are connected to the upper surface of the middle surface layer, so that the reverse wrapping area is stacked on top of the middle surface layer and the overlapping area is stacked on top of the reverse wrapping area. An installation cavity is formed between the overlapping area and the reverse wrapping area, and the installation cavity extends in the front-back direction.
[0008] An elastic band, which extends in the front-to-back direction and is disposed in the mounting cavity;
[0009] When the middle surface layer is in the unfolded state, the elastic band is in the extended state, and the overlapping area and the reverse wrapping area are pulled up to the upright state by the elastic band.
[0010] This utility model has at least the following beneficial effects: When in use, the user unfolds the anti-leakage sanitary napkin based on the one-piece molding process into a curved shape. The middle surface layer is in an unfolded state and is curved with the front and rear ends curving upwards. The front and rear ends of the middle surface layer can pull the front and rear ends of the elastic band, so that the elastic band is in an extended state. The overlapping area and the reverse wrapping area are pulled up to an upright state by the elastic band. The reverse wrapping area and the overlapping area form a three-dimensional protective structure. Relying on the elastic band's rebound to increase the height of the three-dimensional protective structure, it can avoid damage to the patient's skin by the three-dimensional protective structure, and it can also prevent the three-dimensional protective structure from collapsing, thus achieving a good anti-leakage function.
[0011] As a further improvement to the above technical solution, the overlapping area and the reverse wrapping area together form a three-dimensional protective structure. When the middle surface layer is in the unfolded state, the height of the three-dimensional protective structure is greater than or equal to 1 mm and less than or equal to 5 mm.
[0012] As a further improvement to the above technical solution, the elastic modulus of the rubber band is in the range of greater than or equal to 180MPa and less than or equal to 1200MPa.
[0013] As a further improvement to the above technical solution, the elastic band is bonded to the inner wall of the mounting cavity.
[0014] As a further improvement to the above technical solution, the front and rear ends of the overlapping area are respectively provided with first printing strips, and the overlapping area, the reverse wrapping area and the middle surface layer are pressed together by the first printing strips.
[0015] As a further improvement to the above technical solution, a second printing belt is provided on the side of the overlapping area near the extension area, and the overlapping area, the reverse wrapping area and the middle surface layer are pressed together by the second printing belt.
[0016] As a further improvement to the above technical solution, the second printing belt extends along the front-back direction to the first printing belt at both ends of the overlapping area.
[0017] As a further improvement to the above technical solution, the extended area is provided with a protective wing, which protrudes to the side away from the middle surface layer.
[0018] As a further improvement to the above technical solution, the middle surface layer and the side surface layer are integrally molded structures and are made of non-woven fabric material.
[0019] As a further improvement to the above technical solution, the anti-leakage sanitary napkin based on the one-piece molding process also includes an absorbent layer and a waterproof bottom layer. The absorbent layer is located below the middle surface layer, and the waterproof bottom layer is located below the absorbent layer and connected to the side surface layers on both sides. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the overall structure of the anti-leakage sanitary napkin based on the one-piece molding process according to an embodiment of the present utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of a leak-proof sanitary napkin based on an integral molding process according to an embodiment of this utility model.
[0023] Reference numerals: 100, middle surface layer; 200, side surface layer; 210, extension area; 220, overlapping area; 230, reverse wrapping area; 240, first printed strip; 250, second printed strip; 260, third printed strip; 270, protective wing; 300, elastic band; 400, absorbent layer; 500, waterproof bottom layer. Detailed Implementation
[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0025] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0028] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.
[0029] Reference Figure 1 and Figure 2 This utility model embodiment proposes a leak-proof sanitary napkin based on an integrated molding process, including a central surface layer 100, side surface layers 200, and elastic bands 300. The side surface layer 200 includes an extension area 210, a overlapping area 220, and a reverse-wrapping area 230, all integrally molded. Two side surface layers 200 are provided, located on the left and right sides of the central surface layer 100, respectively.
[0030] In this embodiment, the extension area 210 is disposed outside the middle surface layer 100 and extends to the left or right edge of the middle surface layer 100. The overlapping area 220 and the reverse wrapping area 230 extend in the front-back direction, respectively. The two sides of the overlapping area 220 extending in the front-back direction are respectively connected to one of the front-back direction extending sides of the extension area 210 and the reverse wrapping area 230, and the other side of the reverse wrapping area 230 extending in the front-back direction is connected to the middle surface layer 100. The front and rear ends of the reverse wrapping area 230 are respectively connected to the upper surface of the middle surface layer 100, so that the reverse wrapping area 230 is stacked on top of the middle surface layer 100 and the overlapping area 220 is stacked on top of the reverse wrapping area 230. An installation cavity is formed between the overlapping area 220 and the reverse wrapping area 230, and the installation cavity extends in the front-back direction. The elastic band 300 is installed in the installation cavity and extends in the front-back direction.
[0031] To facilitate packaging and storage, the anti-leakage sanitary napkin based on the one-piece molding process of this embodiment is in a folded state when not in use. That is, the front and back parts of the anti-leakage sanitary napkin based on the one-piece molding process are folded towards the middle to reduce the area occupied by the entire anti-leakage sanitary napkin based on the one-piece molding process. The solution of reducing the area occupied by folding is a conventional technical means in the field, and those skilled in the art should be aware of it. It is worth noting that, in the use of the anti-leakage sanitary napkin based on the one-piece molding process of this utility model embodiment, the user unfolds the anti-leakage sanitary napkin based on the one-piece molding process into an arc shape to fit the user's crotch area. The middle surface layer 100 is in an unfolded state and has an arc shape with the front and rear ends curving upwards. The front and rear ends of the middle surface layer 100 can pull the front and rear ends of the elastic band 300, so that the elastic band 300 is in an extended state. At this time, the overlapping area 220 and the reverse wrapping area 230 are pulled up to the upright state by the elastic band 300. The reverse wrapping area 230 and the overlapping area 220 form a three-dimensional protective structure. An anti-leakage angle is formed between the reverse wrapping area 230 and the upper surface of the middle surface layer 100.
[0032] Because it is equipped with overlapping area 220, reverse wrapping area 230 and elastic band 300, the height of the three-dimensional protective structure is increased by the rebound of elastic band 300, which can avoid damage to the patient's skin by the three-dimensional protective structure and also prevent the three-dimensional protective structure from collapsing, thus achieving a good anti-leakage function.
[0033] In some embodiments, the overlapping area 220 and the reverse-wrapping area 230 together form a three-dimensional protective structure. When the middle surface layer 100 is in the unfolded state, the three-dimensional protective structure is in the upright state. The height of the three-dimensional protective structure is greater than or equal to 1 mm and less than or equal to 5 mm. This design ensures that the three-dimensional protective structure can stand up smoothly when the anti-leakage sanitary napkin based on the one-piece molding process is unfolded, achieving a good anti-leakage effect. Moreover, it avoids the three-dimensional protective structure causing foreign body sensation for the user, providing a good user experience.
[0034] In some embodiments, the elastic band 300 is made of elastic spandex yarn, and its elastic modulus ranges from greater than or equal to 180 MPa to less than or equal to 1200 MPa. Preferably, the elastic modulus of the elastic band 300 is greater than or equal to 1040 MPa to less than or equal to 1200 MPa. The elastic band 300 within the above-mentioned elastic modulus range possesses good elasticity and strength. When the anti-leakage sanitary napkin based on the one-piece molding process is unfolded, the elastic band 300 is in an elongated state and can pull the overlapping area 220 and the reverse-wrapping area 230 upright, so that an anti-leakage angle is formed between the reverse-wrapping area 230 and the upper surface of the middle surface layer 100. This anti-leakage angle ranges from greater than or equal to 30° to less than or equal to 90°, achieving good anti-leakage function.
[0035] In some embodiments, the elastic band 300 is bonded to the inner wall of the mounting cavity, which can stabilize the elastic band 300 between the overlapping area 220 and the reverse wrapping area 230, preventing the elastic band 300 from shifting between the overlapping area 220 and the reverse wrapping area 230, thereby ensuring that the stretching of the elastic band 300 can pull the three-dimensional protective structure to stand up, so as to ensure the function of preventing side leakage.
[0036] In some embodiments, a first printed strip 240 is provided at both the front and rear ends of the overlapping area 220. The front end of the overlapping area 220, the front end of the reverse wrapping area 230, and the front end of the middle surface layer 100 are pressed together by the first printed strip 240, and the rear end of the overlapping area 220, the rear end of the reverse wrapping area 230, and the rear end of the middle surface layer 100 are pressed together by the first printed strip 240. In this embodiment, the first printed strip 240 is provided along the front and rear edges of the overlapping area 220, which enables the front ends of the overlapping area 220, the reverse wrapping area 230, and the middle surface layer 100 to be pressed together, and the rear ends of the overlapping area 220, the reverse wrapping area 230, and the middle surface layer 100 to be pressed together, thereby improving the connection strength between the overlapping area 220, the reverse wrapping area 230, and the middle surface layer 100. Furthermore, since the side surface layer 200 is not a rigid structure, the provision of the first printed strip 240 will not interfere with the erection of the three-dimensional protective structure.
[0037] In addition, when a user uses this leak-proof sanitary napkin based on a one-piece molding process, the first printed strip 240 is located on the user's abdomen or buttocks, which presses the front and back ends of the three-dimensional protective structure together, reducing the foreign body sensation caused by the front and back ends of the three-dimensional protective structure on the user's abdomen or buttocks.
[0038] In some embodiments, a second printed strip 250 is provided on the side of the overlapping area 220 near the extension area 210, and the overlapping area 220, the reverse wrapping area 230, and the middle surface layer 100 are pressed together by the second printed strip 250. This arrangement strengthens the connection between the side surface layer 200 and the middle surface layer 100 through the second printed strip 250, making the folding of the overlapping area 220 and the reverse wrapping area 230 more stable, thus ensuring the structural stability of the entire leak-proof sanitary napkin based on a one-piece molding process.
[0039] In some embodiments, the second printing strip 250 extends along the front-back direction to the first printing strip 240 at both ends of the overlapping area 220 to ensure a stable connection between the overlapping area 220 and the middle surface layer 100 at each position along the length direction.
[0040] The edge of the extension area 210 can be adjusted according to actual needs. In some embodiments, the anti-leakage sanitary napkin based on the one-piece molding process has wings, the bottom of the wings has an adhesive layer, and the extension area 210 has a wing portion 270. The wing portion 270 protrudes to the side away from the middle surface layer 100 and covers the upper surface of the wings. In use, the wing portion 270 can be folded to the underside of the crotch area of the underwear, and the adhesive layer at the bottom of the wing is used to bond it to the lower surface of the underwear to prevent the anti-leakage sanitary napkin based on the one-piece molding process from shifting. Users can exercise, lie on their side, and perform other activities with peace of mind.
[0041] In some embodiments, the middle surface layer 100 and the side surface layer 200 are integrally molded structures, and the surface layer with the three-dimensional protective structure is formed by folding non-woven fabric material. Specifically, the non-woven fabric is a non-woven fabric made of super absorbent fiber (SAF). Since the middle surface layer 100 and the side surface layer 200 have good absorption performance, the entire anti-leakage sanitary napkin based on the integral molding process can reduce the stacking of other absorbent materials and can also achieve the absorption effect of conventional products.
[0042] In some embodiments, the leak-proof sanitary napkin based on the one-piece molding process further includes an absorbent layer 400 and a waterproof bottom layer 500. The absorbent layer 400 is disposed below the middle surface layer 100, and the waterproof bottom layer 500 is disposed below the absorbent layer 400. The waterproof bottom layer 500 is connected to the side surface layers 200 located on the left and right sides. Since the middle surface layer 100 is made of a non-woven fabric material made of SAF, the absorbent layer 400 can reduce the amount of wood pulp and other polymer materials, thereby reducing the thickness of the absorbent layer 400. This allows the entire leak-proof sanitary napkin based on the one-piece molding process to be thinner and lighter while achieving good absorbency.
[0043] In some embodiments, the absorbent layer 400 extends to the left and right sides below the side surface layer 200, which can absorb liquid flowing to the side and further improve the side leakage prevention effect of the anti-leakage sanitary napkin based on the one-piece molding process.
[0044] In some embodiments, the side surface layer 200 and the waterproof underlayer 500 are bonded together by hot melt adhesive, and a third printed strip 260 is provided on the side surface layer 200. The third printed strip 260 is provided along the outer edge of the side surface layer 200 and is used to press the side surface layer 200 and the waterproof underlayer 500 together, which can improve the connection strength between the side surface layer 200 and the waterproof underlayer 500.
[0045] In this embodiment, the lower surface of the waterproof base layer 500 is provided with an adhesive layer, which makes it convenient for users to attach the leak-proof sanitary napkin based on the one-piece molding process to the crotch of their underwear.
[0046] The anti-leakage sanitary napkin based on the one-piece molding process of this utility model can solve the side leakage problem of existing sanitary napkins and improve the user's comfort through a specially designed three-dimensional protective structure.
[0047] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A leak-proof sanitary napkin based on a one-piece molding process, characterized in that, include: Middle surface layer; The side surface layer includes an integrally formed extension area, a overlapping area, and a reverse wrapping area. The extension area is located outside the middle surface layer and extends to the left or right edge of the middle surface layer. The overlapping area and the reverse wrapping area extend in the front-back direction, respectively. The two sides of the overlapping area extending in the front-back direction are connected to one of the sides of the extension area and the reverse wrapping area extending in the front-back direction, respectively. The other side of the reverse wrapping area extending in the front-back direction is connected to the middle surface layer. The front and rear ends of the reverse wrapping area are connected to the upper surface of the middle surface layer, so that the reverse wrapping area is stacked on top of the middle surface layer and the overlapping area is stacked on top of the reverse wrapping area. An installation cavity is formed between the overlapping area and the reverse wrapping area, and the installation cavity extends in the front-back direction. An elastic band, which extends in the front-to-back direction and is disposed in the mounting cavity; When the middle surface layer is in the unfolded state, the elastic band is in the extended state, and the overlapping area and the reverse wrapping area are pulled up to the upright state by the elastic band.
2. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The overlapping area and the reverse wrapping area together form a three-dimensional protective structure. When the middle surface layer is in the unfolded state, the height of the three-dimensional protective structure is greater than or equal to 1 mm and less than or equal to 5 mm.
3. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The elastic modulus of the rubber band is greater than or equal to 180 MPa and less than or equal to 1200 MPa.
4. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The elastic band is bonded to the inner wall of the mounting cavity.
5. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The overlapping area is provided with a first printing strip at both the front and rear ends, and the overlapping area, the reverse wrapping area and the middle surface layer are pressed together by the first printing strip.
6. The anti-leakage sanitary napkin based on one-piece molding process according to claim 5, characterized in that, A second printing strip is provided on the side of the overlapping area near the extension area, and the overlapping area, the reverse wrapping area and the middle surface layer are pressed together by the second printing strip.
7. The anti-leakage sanitary napkin based on one-piece molding process according to claim 6, characterized in that, The second printed strip extends along the front-back direction to the first printed strip at both ends of the overlapping area.
8. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The extended area is provided with protective wings, which protrude from the side away from the middle surface layer.
9. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The middle surface layer and the side surface layer are integrally molded structures and are made of non-woven fabric.
10. The anti-leakage sanitary napkin based on one-piece molding process according to claim 1, characterized in that, The anti-leakage sanitary napkin based on the one-piece molding process also includes an absorbent layer and a waterproof bottom layer. The absorbent layer is located below the middle surface layer, and the waterproof bottom layer is located below the absorbent layer and connected to the side surface layers on both sides.