Improved high-breathability sanitary towel

Abstract

The utility model discloses an improved breathable sanitary towel which comprises a surface layer, a flow guide layer, an absorption core layer, a high-permeability leakage-proof layer, a low-permeability leakage-proof layer and a high-permeability bottom layer which are sequentially compounded from top to bottom. The absorption core layer comprises an upper absorption core layer and a lower absorption core layer, the lower absorption core layer serves as a bottom layer of the absorption core layer, covers the towel body and plays a role in assisting absorption, and the upper absorption core layer is arranged above the lower absorption core layer, can cover key areas of private parts and plays a role in enhancing absorption. The absorption core layer is divided into the upper absorption core layer and the lower absorption core layer, the lower absorption core layer serves as the bottom layer of the absorption core layer and plays an auxiliary absorption role, menstrual blood can be well locked, reverse osmosis can be prevented, and the upper absorption core layer is arranged on the lower absorption core layer, is only used for covering key areas of private parts and plays a main absorption role. And the preparation cost of the absorption core layer material can be reduced while the absorption requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of sanitary napkin technology, and in particular to an improved high-breathability sanitary napkin. Background Technology

[0002] See Figure 1 and Figure 2 The image shows an existing high-breathability sanitary napkin, which consists of a surface layer 11, a diversion layer 12, an absorbent core layer 13, a high-breathability leak-proof layer 14, a high-breathability bottom layer 15, a low-breathability leak-proof layer 16, surface side wings 17, and a back wing adhesive layer 18. This type of product has an air permeability ≥20mm / s, fundamentally improving the intimate environment of women during menstruation. Due to its gas convection function, it significantly improves the user experience and effectively inhibits microbial growth, ultimately benefiting women's reproductive health.

[0003] While these products boast excellent breathability, their leak-proof layer uses highly breathable non-PE film materials, such as water-repellent SMS and PTFE films, thus always carrying a risk of leakage. To effectively enhance their leak-proof properties, these products utilize a new composite core with high SAP content, giving them superior absorbency. For example, a 240-day-use product typically has a saturated absorbency exceeding 400g. Therefore, this configuration presents the following three challenges:

[0004] 1. See Figure 3 and Figure 4 The image shows a conventional sanitary napkin, which consists of a surface layer 21, a diversion layer 22, an absorbent core layer 23, a leak-proof layer 24, an adhesive backing layer 25, surface side wings 26, and side wing adhesive backing layers 27. Existing highly breathable sanitary napkins (see...) Figure 1 and Figure 2 Its leak-proof layer is made of a non-PE, highly breathable, and water-repellent substrate, costing several times more than ordinary PE film. Simultaneously, it employs a high-configuration composite core, costing more than twice as much as conventional cores such as fluff pulp. Therefore, compared to regular sanitary napkins, its manufacturing cost, especially material cost, is approximately 40% higher. This high cost dictates a high selling price, which is clearly detrimental to product marketing.

[0005] 2. The thickness of this type of product cannot achieve a truly ultra-thin profile, resulting in relatively poor concealment during use. Furthermore, the composite core is isotropic in all directions and regions, with a uniformly distributed thickness. Due to the need for enhanced leak prevention, the core must be of a "high-configuration" quality. Combined with the inherent bulkiness of the composite core, this results in a relatively thick product, similar to slimmer products on the market, which is inconsistent with the product's high-end positioning. At the same time, the thickness also leads to poor concealment during use, visually contradicting the product's breathability, and is likely to be criticized by consumers.

[0006] 3. The poor absorption rate and surface residue of this type of product somewhat offset the benefits of breathability. Although the composite core has the advantage of ultra-high absorbency, its high SAP content also affects the absorption rate of the product due to the "sticky" layer formed after SAP absorption. This reduces the absorption rate in subsequent absorption phases, making it prone to leakage during heavy menstrual flow. At the same time, menstrual blood residue on the surface is more severe than with regular products. Since menstrual blood is a culture medium for microorganisms and remains in close contact with the body, this clearly negates some of the positive effects of breathability.

[0007] Therefore, to ensure that highly breathable sanitary napkins are widely accepted by the market and become a universally beneficial product, truly helping women's intimate / reproductive health and achieving their due social and economic benefits, the aforementioned problems urgently need to be addressed. To this end, the applicant, through beneficial exploration and research, has found a solution to the above problems, and the technical solution described below arose from this context. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide an improved high-breathability sanitary napkin that maintains breathability, reduces manufacturing costs, and enhances the user experience, in order to address the shortcomings of the existing technology.

[0009] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0010] An improved breathable sanitary napkin comprises, from top to bottom, a top layer, a diversion layer, an absorbent core layer, a high-permeability leak-proof layer, a low-permeability leak-proof layer, and a high-permeability bottom layer;

[0011] The absorbent core layer includes an upper absorbent core layer and a lower absorbent core layer. The lower absorbent core layer serves as the bottom layer of the absorbent core layer, covers the towel body, and plays an auxiliary absorption role. The upper absorbent core layer is located above the lower absorbent core layer and can cover the key areas of the private parts. The overlapping area with the lower absorbent core layer also plays a role in enhancing absorption.

[0012] In a preferred embodiment of this utility model, the upper absorbent core layer has a short elliptical structure or a rectangle, and the lower absorbent core layer has an elongated elliptical structure or a rectangle. The upper absorbent core layer is located in the key area of ​​the private parts, and its center line coincides with the center line of the lower absorbent core layer.

[0013] In a preferred embodiment of this utility model, the lower absorbent core layer is made of a core material with high SAP content, and the upper absorbent core layer is made of a core material with high fluff pulp content.

[0014] In a preferred embodiment of the present invention, a strip-shaped high-transparency void area is provided at the middle position of the low-transparency leak-proof layer. The center line of the strip-shaped high-transparency void area coincides with the center line of the upper absorbent core layer. The width of the strip-shaped high-transparency void area is smaller than the width of the high-transparency leak-proof layer, and its length is greater than or equal to the length of the lower absorbent core layer.

[0015] In a preferred embodiment of this utility model, the width of the strip-shaped high-transparency open area is 10mm to 40mm.

[0016] In a preferred embodiment of the present invention, a plurality of adhesive strips are spaced apart on the back side of the high-transparency underlayer, and the plurality of adhesive strips are located on both sides of the back side of the high-transparency underlayer and avoid the strip-shaped high-transparency void area.

[0017] In a preferred embodiment of this utility model, the width of the high-permeability bottom layer is equivalent to that of the main body of the towel and does not cover the towel body wings. The adhesive of the towel body wings is applied directly to the low-permeability leak-proof layer.

[0018] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model, based on the usage scenario, designs the absorbent core layer as a combined core, divided into an upper absorbent core layer and a lower absorbent core layer. The lower absorbent core layer, with a high SAP content, serves as the bottom layer of the absorbent core layer, playing a role in auxiliary absorption and leak prevention. It can effectively lock in menstrual blood, prevent backflow, and slow down the rapid seepage of menstrual blood and its impact on the high-permeability leak-proof layer. The upper absorbent core layer, with a high fluff pulp content, is placed above the lower absorbent core layer and covers the key areas of the private parts (excretion area), playing a role in rapid absorption and guiding forward and backward. This structural combination not only meets the product's absorption requirements, but also, with this optimized structure that focuses on specific areas, it greatly reduces the cost of absorbent core layer materials. Moreover, because non-key areas are significantly simplified, these areas of the product are thinner and softer, resulting in excellent invisibility and significantly reducing the product's presence during use.

[0020] 2. Based on the analysis and identification of usage scenarios and the optimization of the core layer, this utility model significantly reduces the coverage area of ​​the high-permeability leak-proof layer. While meeting the air permeability requirements, it can effectively reduce the amount of high-cost high-permeability leak-proof materials used, further reducing the manufacturing cost of the product.

[0021] 3. The low-permeability leak-proof layer of this utility model has a strip-shaped high-permeability open area, which can ensure the overall breathability of the product.

[0022] 4. The width of the high-permeability back layer of this utility model is reduced from the full width to the towel body area, which not only reduces the cost, but also effectively improves the peel force of the wing adhesive because the product wing adhesive is directly coated on the low-permeability leak-proof layer, thus avoiding the occurrence of wing adhesive transfer during use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is the front view of an existing high-breathability sanitary napkin.

[0025] Figure 2 This is a longitudinal cross-sectional view of an existing high-permeability sanitary napkin.

[0026] Figure 3 This is the front view of a regular sanitary napkin.

[0027] Figure 4 This is a longitudinal cross-sectional view of a standard sanitary napkin.

[0028] Figure 5 This is a schematic diagram of the structure of this utility model.

[0029] Figure 6 This is a longitudinal sectional view of the present invention. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0031] See Figure 5 and Figure 6 The image shows a modified breathable sanitary napkin, which consists of, from top to bottom, a top layer 100, a diversion layer 200, an absorbent core layer 300, a high-permeability leak-proof layer 400, a low-permeability leak-proof layer 500, and a high-permeability bottom layer 600.

[0032] The absorbent core layer 300 is a specially designed composite core layer based on the key and auxiliary absorption areas of the product. The upper and lower core layer structure is a common structure, including an upper absorbent core layer 310 and a lower absorbent core layer 320. The lower absorbent core layer 320 serves as the bottom layer of the absorbent core layer 300, covering the towel body and providing auxiliary absorption and leak prevention. The upper absorbent core layer 310 is positioned above the lower absorbent core layer 320, between the lower absorbent core layer 310 and the guide layer 200. It covers the key areas of the intimate area (excretion area) and, together with the overlapping area of ​​the lower absorbent core layer 310, provides rapid absorption and guidance. In this embodiment, the upper absorbent core layer 310 has a rectangular or short elliptical structure, and the lower absorbent core layer 320 has a rectangular or long elliptical structure. The position of the upper absorbent core layer 310 overlaps with the area where the product is used, and its centerline overlaps with the lower absorbent core layer 320.

[0033] The improved breathable sanitary napkin of this invention has two main absorbent areas: a primary absorbent area and a secondary absorbent area. The primary absorbent area, located within the upper absorbent core layer 310 and covering the lower absorbent core 320, primarily absorbs and locks in menstrual blood. The secondary absorbent area, excluding the area within the upper absorbent core layer 310, mainly serves a safety and protective function. In unconventional usage scenarios or when the primary absorbent area is insufficient to meet absorption requirements, the secondary absorbent area prevents further leakage of menstrual blood.

[0034] The lower absorbent core layer 320 is made of a high-SAP content core material. As the bottom layer of the absorbent core layer 300, it combines with the upper core layer to form the key absorption area of ​​the product, and also serves as the core layer for auxiliary absorption. The lower absorbent core layer 320 preferably uses an ultra-thin and ultra-flexible composite core. Due to its high SAP content, it can not only effectively absorb and lock in menstrual blood and prevent backflow, but also form an "adhesive" layer after absorption to play an auxiliary role in preventing leakage.

[0035] The upper absorbent core layer 310 is made of a high-fluff pulp content core material, such as lint-free paper. Fluff pulp, as a plant fiber, has excellent performance in rapid absorption and liquid conduction, which can greatly improve the shortcomings of existing high-transparency products in terms of multiple absorption speed and surface residue. At the same time, the upper absorbent core layer 310 is only applied to key areas, while non-key areas remain thin and soft, giving the product excellent invisibility and greatly reducing its presence.

[0036] A strip-shaped high-permeability void area 510 is provided in the middle of the low-permeability leak-proof layer 500, forming a highly breathable channel in the center of the sanitary napkin to ensure that the product still maintains its overall breathability. This strip-shaped high-permeability void area 510 can be a through-hole or non-through-hole structure. The center line of the strip-shaped high-permeability void area 510 coincides with the center line of the absorbent core layer 300 (or the center line of the product), while the width of the strip-shaped high-permeability void area 510 is significantly reduced from the full width of existing high-permeability products to a narrow strip located in the center of the product. In this embodiment, the width of the strip-shaped high-permeability void area 510 is 10mm to 40mm, preferably 20mm to 25mm. The low-permeability leak-proof layer 500 is made of PE film material with high leak-proof properties; in this application example, a breathable PE film is preferred. Because of the use of a strip-shaped high-permeability structure, not only is the original breathability of the product maintained, but the width of the 400mm high-permeability leak-proof layer is also greatly reduced, which also makes it possible to optimize the core and greatly reduce the product cost.

[0037] The width of the high-permeability leak-proof layer 400 should be at least 10 mm wider than the width of the high-permeability strip 510, preferably 10-30 mm. Its length also needs to completely cover the length of the absorbent core layer 320. Compared to existing high-permeability products, the coverage area of ​​the high-permeability leak-proof layer 400 is significantly reduced. While meeting the breathability requirements, this effectively reduces the amount of high-cost leak-proof materials used, further lowering product manufacturing costs. In this embodiment, the high-permeability leak-proof layer 400 uses breathable and water-repellent materials such as SMS and PTEF that have undergone special three-resistant treatment, preferably SMS that has undergone special three-resistant treatment.

[0038] A plurality of adhesive strips 610 are spaced apart on the back of the high-transparency underlayer 600. These adhesive strips 610 are located on both sides of the back of the high-transparency underlayer 600 and avoid the strip-shaped high-transparency open area 510 to ensure the product's breathability. The adhesive strips 610 are made of hot-melt pressure-sensitive adhesive. In this embodiment, the high-transparency underlayer 600 is made of non-woven fabric, preferably water-repellent SMS.

[0039] The improved breathable sanitary napkin of this invention also includes side wings 700 on both sides, and a back wing adhesive strip 710 is provided on the back of each side wing 700. In existing high-permeability products, the high-permeability bottom layer (back layer) 600 is a full-coverage structure, and the wing adhesive 710 is applied on the high-permeability bottom layer 600, which easily leads to wing adhesive transfer during use. In this embodiment, the width of the high-permeability bottom layer is reduced to be equivalent to that of the main body of the napkin, allowing the low-permeability leak-proof layer 500 in the wing area to be exposed, and the wing adhesive 710 is applied on the low-permeability leak-proof layer 500, fundamentally solving the problem of wing adhesive 710 transfer, and reducing costs by reducing the consumption of the high-permeability bottom layer 600.

[0040] 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 illustrative of the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A modified high-breathability sanitary napkin, comprising, from top to bottom, a surface layer, a diversion layer, an absorbent core layer, a high-breathability leak-proof layer, a low-breathability leak-proof layer, and a high-breathability bottom layer; characterized in that, The absorbent core layer includes an upper absorbent core layer and a lower absorbent core layer. The lower absorbent core layer serves as the bottom layer of the absorbent core layer, covers the towel body, and plays an auxiliary absorption role. The upper absorbent core layer is located above the lower absorbent core layer and can cover the key areas of the private parts. The overlapping area with the lower absorbent core layer also plays a role in enhancing absorption.

2. The improved highly breathable sanitary napkin as described in claim 1, characterized in that, The upper absorbent core layer has a short elliptical or rectangular structure, and the lower absorbent core layer has an elongated elliptical or rectangular structure. The upper absorbent core layer is located in the key area of ​​the private parts, and its center line coincides with the center line of the lower absorbent core layer.

3. The improved highly breathable sanitary napkin as described in claim 1, characterized in that, The lower absorber core layer is made of a core material with high SAP content, and the upper absorber core layer is made of a core material with high fluff pulp content.

4. The improved highly breathable sanitary napkin as described in claim 1, characterized in that, A strip-shaped high-transparency void area is provided in the middle of the low-transparency leak-proof layer. The center line of the strip-shaped high-transparency void area coincides with the center line of the upper absorbent core layer. The width of the strip-shaped high-transparency void area is smaller than the width of the high-transparency leak-proof layer, and its length is greater than or equal to the length of the lower absorbent core layer.

5. The improved highly breathable sanitary napkin as described in claim 4, characterized in that, The width of the strip-shaped high-transparency open area is 10mm to 40mm.

6. The improved highly breathable sanitary napkin as described in claim 4, characterized in that, The back of the high-transparency underlayer is provided with several adhesive strips at intervals, and the adhesive strips are located on both sides of the back of the high-transparency underlayer and avoid the strip-shaped high-transparency void area.

7. The improved highly breathable sanitary napkin as described in claim 6, characterized in that, The width of the high-permeability bottom layer is equivalent to that of the main body of the towel and should not cover the wing area of ​​the towel body. The adhesive on the wing area of ​​the towel body is applied directly to the low-permeability leak-proof layer.

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