Sanitary towel
By incorporating an expansion reminder structure into the absorbent layer of the sanitary napkin, which expands upon contact with liquid to form a protrusion, the problem of visually impaired women having difficulty judging when to change sanitary napkins is solved, achieving greater autonomy and comfort in care.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-03-31
AI Technical Summary
Visually impaired women often struggle to determine when to change sanitary napkins, and current sanitary napkins lack an effective reminder mechanism.
An expansion reminder structure is set on the absorbent layer of the sanitary napkin, including an expandable body and an elastic membrane layer. When liquid diffuses into the expandable body, it expands to form a raised structure, reminding the user to replace it.
Through the design of the expansion reminder structure, visually impaired women can more easily perceive the wetness of the sanitary napkin, improving their autonomy and comfort during menstrual care.
Smart Images
Figure CN224056186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hygiene products technology, specifically to a sanitary napkin. Background Technology
[0002] Sanitary napkins are hygiene products used by women during menstruation, primarily made of cotton, non-woven fabric, and pulp. Structurally, sanitary napkins also have side wings on both sides for attaching and turning them onto underwear, ensuring a stable and secure fit.
[0003] Normally, women can use sanitary napkins by visually inspecting them, but women with visual impairments face significant challenges in using them. Utility Model Content
[0004] In view of this, this application provides a sanitary napkin that is convenient for normal people to use while also taking into account people with visual impairments.
[0005] According to one aspect of this application, a sanitary napkin is provided, comprising a top layer, an absorbent layer, and a breathable bottom film stacked sequentially. The absorbent layer is provided with an expansion reminder structure, which includes an expansion body fixed to the absorbent layer by an elastic membrane. The expansion body is in contact with the absorbent layer. When liquid diffused to the bottom of the expansion body comes into contact with the expansion body, the expansion body expands in volume to form a raised structure, thereby realizing the reminder function.
[0006] Optionally, the expanded body is, for example, montmorillonite powder.
[0007] Optionally, the surface layer is provided with indentations that are distributed along the edge contour of the surface layer, dividing the sanitary napkin into a working area and an edge area surrounding the working area.
[0008] Optionally, the surface layer includes a front end, a rear end, and a middle portion between the front end and the rear end, wherein the front end and the rear end have a wider width relative to the middle portion, and the rear end has a wider width relative to the front end.
[0009] Optionally, the surface layer is provided with protrusions, which are located outside the indentation in the middle of the surface layer and / or at the center of the tail end of the surface layer.
[0010] Optionally, the expansion reminder structure is positioned near the edge of the work area.
[0011] Optionally, the expansion reminder structure is located at the working area near the edge of the front end of the sanitary napkin.
[0012] Optionally, the two surfaces of the absorbent layer are provided with an upper wrapping reverse osmosis layer and a lower wrapping anti-reverse osmosis layer, wherein the upper wrapping reverse osmosis layer is located between the absorbent layer and the surface layer, and the lower wrapping anti-reverse osmosis layer is located between the absorbent layer and the permeable bottom membrane.
[0013] Optionally, the expansion reminder structure protrudes relative to the surface layer before expansion, and the protrusion height is higher after the expansion reminder structure expands.
[0014] Optionally, the sanitary napkin is a sleeping panty type sanitary napkin.
[0015] The advantages and positive effects of this utility model are as follows: The sanitary napkin of this application is designed from the perspective of visually impaired women, taking into full account their special needs of having difficulty judging when to change sanitary napkins during menstruation. With humanization, convenience and safety as the design concept, it integrates innovative materials and thoughtful design, aiming to improve the autonomy and comfort of visually impaired women in menstrual care, so that they can easily cope with menstruation. Attached Figure Description
[0016] Figure 1 A sanitary napkin for the blind according to an embodiment of this application is shown;
[0017] Figure 2 An exploded view of a sanitary napkin for the blind provided according to an embodiment of this application is shown;
[0018] Figure 3 A schematic diagram of a sleeping pant-style sanitary napkin is shown;
[0019] Figure 4 An exploded view of a sleeping pant-style sanitary napkin is shown. Detailed Implementation
[0020] To better understand this utility model, the present utility model will be further described below with reference to specific embodiments and accompanying drawings.
[0021] Figure 1 This application illustrates a sanitary napkin for the blind provided according to an embodiment of the present application. Figure 2 An exploded view of a sanitary napkin for the blind provided according to an embodiment of this application is shown. Figure 1 and Figure 2 As shown, the sanitary napkin 10 includes, from top to bottom, a surface layer 110, an absorbent layer 130, and a breathable bottom film 150.
[0022] The surface layer 110 includes a front end 111, a rear end 112, and a middle portion 113 between the front end 111 and the rear end 112. The two side edges of the middle portion 113 smoothly extend outwards to form the front end 111 and the rear end 112; in other words, the front end 111 and the rear end 112 have a wider width than the middle portion 113. It is worth noting that in this embodiment, the rear end 112 has a wider width than the front end 111. Furthermore, side wings 114 are connected to both sides of the middle portion 112. The surface layer 110 can be made of a soft, skin-friendly, and breathable non-woven fabric. The surface layer 110 primarily comes into contact with the user's skin, providing a comfortable feel, and its good breathability helps to keep the user dry.
[0023] The surface layer 110 also has a three-dimensional shape 160 and a functional chip 170. The three-dimensional shape 160 may include indentations 161 and / or protrusions 162. The indentations 161 are distributed along the edge contour of the surface layer 110, dividing the sanitary napkin into a working area and an edge area surrounding the working area. The indentations 161 can prevent liquid from spreading outward. Since the width of the middle portion 113 of the surface layer 110 is relatively narrow, a protrusion 162 may also be provided outside the indentation 161 in the middle portion 113 of the surface layer 110, which can further prevent liquid from spreading outward. Furthermore, a protrusion 162 may also be provided at the center of the tail end 112 of the surface layer 110. Since the tail end 112 has a relatively wide width, in order to make it as widely available as possible, a protrusion 162 is provided at the center of the tail end 112 of the surface layer 110. The protrusion 162 at the center of the tail end 112 guides the flow of liquid, allowing the liquid to diffuse to both sides of the protrusion 162.
[0024] Indentation 161 can be formed by embossing. Protrusion 162 can be integrally formed with surface layer 110 or separately formed from surface layer 110. Specifically, multi-layer co-extrusion or composite molding can be used to integrally form protrusion 162 with surface layer 110. For example, during the fabrication of surface layer 110, protrusion 162 and surface layer 110 can be formed simultaneously using appropriate molds or processing equipment. This ensures there are no gaps between protrusion 162 and surface layer 110, resulting in a denser overall structure and effectively preventing liquid from seeping through the gaps between protrusion 162 and surface layer 110. Protrusion 162 and surface layer 110 can also be separately formed. That is, surface layer 110 and protrusion 162 can be fabricated separately and then fixed together. In one embodiment, ultrasonic welding can be used to fix surface layer 110 and protrusion 162 together. The high-frequency vibration of ultrasound causes the fibers of protrusion 162 and surface layer 110 to rub against each other and fuse, thereby achieving a strong connection. This method avoids chemical pollution and provides a high connection strength, ensuring that the three-dimensional leak-proof edge will not separate from the surface layer during use. In another embodiment, hot melt adhesive can be used to bond the protrusion 162 and the surface layer 110 together. A hygienic and skin-irritating hot melt adhesive is selected, and the protrusion 162 is adhered to the corresponding position on the surface layer 110. During production, a precise adhesive applicator is used to evenly apply the hot melt adhesive to the joint area of the protrusion 162 or the surface layer 110, and then the two are quickly bonded together. After cooling and curing, a good fixing effect is achieved. In yet another embodiment, a mechanical fixing method can be used to make the connection between the protrusion 162 and the surface layer 110 detachable. For example, small grooves or snap-fit structures can be designed at the joint between the protrusion 162 and the surface layer 110. During assembly, the grooves of the protrusion 162 and the snap-fits of the surface layer 110 engage to ensure a tight connection. This method is relatively complex, but it can provide a more stable connection and can be repeatedly disassembled and installed to a certain extent. Although such a function is generally not needed in sanitary napkin products, this fixing method can facilitate quality inspection and other operations during the production process.
[0025] The functional chip 170 is located on the surface layer 110 or sandwiched between multiple layers of non-woven fabric of the surface layer 110. The functional chip 170 may be made of thermoplastic polyurethane (TPU), which has good elasticity, flexibility, and shape memory properties. TPU also has certain moisture resistance and chemical resistance, allowing it to function stably even in environments where sanitary napkins may come into contact with menstrual blood and other liquids. Furthermore, TPU is relatively soft and will not cause discomfort to the user. The functional chip 170 is shaped using an inverted V-shape three-dimensional cutting, making the sanitary napkin less prone to shifting and providing some protection against side leakage of menstrual blood. It is worth noting that when a protrusion 162 is provided at the center of the tail end 112 of the surface layer 110, the V-shaped structure of the functional chip 170 exposes the protrusion 162; that is, at the tail end 112 of the surface layer 110, the functional chip 170 is located on both sides of the protrusion 162 and does not cover the area where the protrusion 162 is located.
[0026] The absorbent layer 130 is located between the top layer 110 and the breathable bottom membrane 150. The absorbent layer 130 adopts a multi-layer composite structure. The core part is a mixture of superabsorbent polymer (SAP) and fluff pulp, which can quickly absorb and lock in menstrual blood, ensuring good absorption performance and preventing leakage.
[0027] Furthermore, the absorbent layer 130 has an upper anti-backflow layer 120 and a lower anti-backflow layer 140 on its two surfaces. The upper anti-backflow layer 120 is located between the absorbent layer 130 and the surface layer 110 to prevent backflow of liquid after absorption, ensuring that the liquid is firmly locked within the absorbent layer 130 and keeping the sanitary napkin surface layer 110 dry. The lower anti-backflow layer 140 is located between the absorbent layer 130 and the breathable bottom membrane 150 to prevent liquid in the absorbent layer 130 from permeating into the breathable bottom membrane 150. Both the upper anti-backflow layer 120 and the lower anti-backflow layer 140 are made of dust-free paper material.
[0028] The breathable bottom membrane 150 is a microporous PE (polyethylene) membrane, which ensures waterproofness while providing good breathability. It is located below the lower anti-backflow layer 140 and connected to it. At the same time, the side away from the lower anti-backflow layer 140 is connected to a non-fluorescent adhesive backing for securing the sanitary napkin.
[0029] The breathable bottom membrane 150 is shaped to match the top layer 110. The edges of the breathable bottom membrane 150 and the top layer 110 are joined together, and the central area forms a space to accommodate the upper reverse osmosis layer 120, the absorbent layer 130, and the lower anti-reverse osmosis layer 140. The central areas of the top layer 110, the upper reverse osmosis layer 120, the absorbent layer 130, the lower anti-reverse osmosis layer 140, and the central area of the breathable bottom membrane 150 can also be joined together by hot pressing, bonding, or any other existing processing method. This embodiment does not limit this. The breathable bottom membrane 150 is attached to the outer film 210 via a non-fluorescent adhesive 190.
[0030] Furthermore, the sanitary napkin in this embodiment is also provided with an expansion reminder structure 180, which is disposed between the absorbent layer 130 and the upper wrapping reverse osmosis layer 120. The expansion reminder structure 180 includes an expansion body 181 and an elastic membrane layer. The expansion body 181 is located on the surface of the absorbent layer 130, and the elastic membrane layer covers and encapsulates the expansion body 181. Specifically, the edge of the elastic membrane layer is fixed to the absorbent layer 130, and a space for accommodating the expansion body 181 is formed between the central region of the elastic membrane layer and the absorbent layer 130. When the expansion body 181 contacts the absorbent layer 130, and the liquid that has diffused to the bottom of the expansion body 181 comes into contact with the expansion body 181, the expansion body 181 expands in volume, forming a raised structure to achieve the reminder function.
[0031] The expander 181 is, for example, montmorillonite powder. Powdered montmorillonite allows for better contact and reaction with water in the liquid, increasing the reaction area. Furthermore, it facilitates uniform distribution within the space between the absorbent layer 130 and the elastic membrane layer, achieving a more uniform expansion effect. The elastic membrane layer can be made of a thin, flexible, and breathable polymer film material, such as a finer, non-woven fabric-like material or a specially treated polyvinyl alcohol (PVA) film. These materials provide a certain degree of fixation and encapsulation without excessively hindering the water absorption and expansion of the montmorillonite.
[0032] Furthermore, the expansion reminder structure 180 is positioned near the edge of the working area. In one embodiment, the expansion reminder structure 180 is positioned near the edge of the front working area. Before expansion, the expansion reminder structure 180 protrudes relative to the surface layer 110, thus serving to remind the user of their forward and backward orientation. After expansion, the expansion reminder structure 180 increases the height of the protrusion, thereby achieving the reminder function.
[0033] Furthermore, the elastic membrane itself has a certain degree of elasticity and porous structure. For example, the elastic membrane of non-woven fabric has tiny gaps between fibers, or PVA film can reserve a certain amount of microspace by controlling its degree of cross-linking, so that montmorillonite can change its thickness and shape outward along these pores and microspaces after absorbing water. On the other hand, the elastic membrane is not designed and manufactured to be completely tight and seamless, but rather leaves appropriate margins so that montmorillonite has enough space to change the shape of the area after absorbing water, thereby achieving the purpose of reminding blind women to change their sanitary napkins by increasing thickness and changing shape.
[0034] The membrane structure described above also applies to overnight panty-style sanitary napkins. Figure 3 A schematic diagram of a sleeping pant-style sanitary napkin is shown. Figure 4 An exploded view of a sleeping pant-style sanitary napkin is shown. (As shown) Figure 3 and Figure 4 As shown, the sleeping pant-type sanitary napkin includes: a surface layer 110, an upper wrapping reverse seepage layer 120, an absorbent layer 130, a lower wrapping anti-reverse seepage layer 140, a breathable bottom membrane 150, a three-dimensional shape 160, a functional chip 170, and an expansion reminder structure 180, which are the same as the surface layer 110, upper wrapping reverse seepage layer 120, absorbent layer 130, lower wrapping anti-reverse seepage layer 140, breathable bottom membrane 150, three-dimensional shape 160, functional chip 170, and expansion reminder structure 180 of the sanitary napkin 10.
[0035] Unlike the sanitary napkin 10, the overnight panty-type sanitary napkin 20 also includes an overnight panty body 201. The overnight panty body 201 has markings 202 on the front and / or back. These markings 202 are used to remind blind users of the front and back of the overnight panty. When markings 202 are present on both the front and back, they can be different to facilitate differentiation by blind users. These markings 202 include, but are not limited to, Braille lettering.
[0036] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.
Claims
1. A sanitary napkin characterized by, The sanitary napkin comprises a surface layer, an absorbent layer and a breathable bottom film which are sequentially stacked, the absorbent layer is provided with an expansion reminding structure, the expansion reminding structure comprises an expansion body fixed to the absorbent layer by an elastic film, the expansion body is in contact with the absorbent layer, when liquid diffused to the lower side of the expansion body is in contact with the expansion body, the expansion body expands in volume to form a convex structure, thereby realizing the reminding function.
2. The sanitary napkin of Claim 1 wherein, The expansion body is a montmorillonite powder.
3. The sanitary napkin of Claim 1 wherein, The surface layer is provided with indentations which are distributed along the edge contour of the surface layer, thereby dividing the sanitary napkin into a working area and an edge area surrounding the working area.
4. The sanitary napkin of Claim 3 wherein, The surface layer comprises a front end, a tail end and a middle part between the front end and the tail end, the front end and the tail end have a wider width relative to the middle part, and the tail end has a wider width relative to the front end.
5. The sanitary napkin of Claim 4 wherein, The surface layer is provided with a convex structure, which is arranged outside the indentations of the middle part of the surface layer and / or at the center of the tail end of the surface layer.
6. The sanitary napkin of Claim 1 wherein, The expansion reminding structure is arranged at a position close to the edge area in the working area of the sanitary napkin.
7. The sanitary napkin of Claim 4 wherein, The expansion reminding structure is arranged at a position close to the edge area in the working area of the front end of the sanitary napkin.
8. The sanitary napkin of Claim 1 wherein, The two surfaces of the absorbent layer are provided with an upper wrapping reverse osmosis layer and a lower wrapping reverse osmosis prevention layer, wherein the upper wrapping reverse osmosis layer is located between the absorbent layer and the surface layer, and the lower wrapping reverse osmosis prevention layer is located between the absorbent layer and the breathable bottom film.
9. The sanitary napkin of Claim 1 wherein, The expansion reminding structure is higher in height before expansion relative to the surface layer, and the height of the expansion reminding structure is higher after expansion.
10. The sanitary napkin of any of Claims 1-9, wherein, The sanitary napkin is a sleep pants type sanitary napkin.