Partitioned absorbent sanitary napkin

Abstract

This utility model relates to the field of sanitary napkin technology, providing a zoned absorbent sanitary napkin that solves the problem of side leakage caused by design defects in existing sanitary napkins. The utility model includes a sanitary napkin body comprising a top layer, a diversion layer, an absorbent core, and a bottom layer stacked from top to bottom. The absorbent core is divided along its length into a front absorbent zone, a middle diversion zone, and a rear liquid storage zone. The absorbent core includes a covering layer and an inner core, which is filled with SAP particles. The number of SAP particles in the inner core gradually increases from the front absorbent zone to the rear liquid storage zone. The top surface of the top layer is coated with a marking layer to distinguish the orientation of the absorbent core. By matching the menstrual flow distribution through SAP gradient matching, it avoids redundancy in the front and saturation in the rear, reduces the amount of SAP used in the front (by 30%), and accurately matches functional needs.

Description

Technical Field

[0001] This utility model relates to the field of sanitary napkin technology, specifically to a partitioned absorbent sanitary napkin. Background Technology

[0002] Because menstrual fluid is unevenly distributed along the length of a sanitary napkin (less flow at the front and more fluid at the back), the uniformly filled SAP particles result in an actual utilization rate of less than 40%—the front SAP is in a low-load state for a long time, while the back SAP is prone to premature saturation, causing side leakage.

[0003] Chinese Patent Publication No. CN212140745U discloses a perforated sanitary napkin with a positioning absorbent area, comprising a positioning piece, a folded piece, and an absorbent area. The absorbent area is located inside the positioning piece and the folded piece, with the positioning piece located below the folded piece. The absorbent area includes a protective layer, a core, and a diversion layer. The core is located between the protective layer and the diversion layer, with the diversion layer located above the protective layer. The core includes a protrusion and an absorbent layer. The protrusion is located inside the two absorbent layers, and a diversion portion is provided between the protrusion and the absorbent layer. The diversion layer is located above the protrusion and the absorbent layer.

[0004] This invention first guides and diverts the liquid through a flow-guiding layer, and then uses the core to absorb the diverted liquid in different areas. However, since this invention is similar to traditional sanitary napkins, the absorption capacity of the core is consistent in each area along the length direction. The front SAP is in a low-load state for a long time, while the rear SAP is prone to premature saturation, which can lead to side leakage. Utility Model Content

[0005] Therefore, in order to address the above problems, this utility model provides a partitioned absorbent sanitary napkin, which solves the problem of side leakage caused by design defects in existing sanitary napkins.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A zoned absorbent sanitary napkin includes a sanitary napkin body, which comprises a top layer, a diversion layer, an absorbent core, and a bottom layer stacked from top to bottom. The absorbent core is divided into a front absorbent zone, a middle diversion zone, and a rear liquid storage zone along its length. The absorbent core includes a covering layer and an inner core, which is filled with SAP particles. The number of SAP particles in the inner core gradually increases from the front absorbent zone to the rear liquid storage zone. The top surface of the top layer is coated with a marking layer to distinguish the orientation of the absorbent core.

[0008] Furthermore, the marking layer consists of a plurality of spray lines spaced apart on the upper surface of the surface layer, each spray line having a different color.

[0009] Furthermore, there are two spray lines, located at both ends of the length direction of the absorbent core.

[0010] Furthermore, the flow guiding layer is made of 6D-8D PP or PE or PP and PE bicomponent coarse denier flow guiding fibers.

[0011] Furthermore, the surface of the flow guiding layer is provided with a plurality of through holes, each of which is distributed above the middle flow guiding area and the rear liquid storage area.

[0012] Furthermore, the width of the inner core gradually increases from the front absorption area to the rear liquid storage area.

[0013] Furthermore, the free end of the inner core of the rear liquid storage area has an outwardly protruding arc-shaped edge.

[0014] Furthermore, the inner core has several notches spaced apart on its arc-shaped edge.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses SAP gradient matching to match the menstrual flow distribution, avoiding redundancy in the front section and saturation in the back section. The middle section diverts the liquid to the high-capacity storage area in the back section, solving the side leakage caused by liquid retention in the middle section. The label layer intuitively distinguishes the front and back sections, making it easy for users to wear. It ensures that the high flow area is aligned with the back storage area, reducing the amount of SAP used in the front section (reducing the amount by 30%) and accurately matching functional requirements.

[0017] 2. This utility model uses multi-colored spray lines spaced apart on the surface to help users distinguish the front and back sides when wearing the garment, ensuring correct wearing. The linear spray lines do not affect breathability and are not located in areas that come into direct contact with liquids, thus preventing the spray lines from spreading and staining. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the unfolded structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model.

[0020] Explanation of icon numbers:

[0021] Sanitary napkin body 1;

[0022] Surface layer 2;

[0023] Flow guide layer 3; Through hole 31;

[0024] Absorption core 4; front absorption zone 41; middle flow guiding zone 42; rear liquid storage zone 43;

[0025] Bottom 5;

[0026] Covering layer 6;

[0027] Core 7; Notch 71;

[0028] Label layer 8. Detailed Implementation

[0029] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] Example:

[0031] like Figures 1 to 2 As shown, a zoned absorbent sanitary napkin includes a sanitary napkin body 1. The sanitary napkin body 1 includes a top layer 2, a diversion layer 3, an absorbent core 4, and a bottom layer 5, which are stacked one layer from top to bottom. The absorbent core 4 is divided into a front absorbent area 41, a middle diversion area 42, and a rear liquid storage area 43 along its length. The absorbent core 4 includes a covering layer 6 and an inner core 7. The inner core 7 is filled with SAP particles. The number of SAP particles in the inner core 7 gradually increases from the front absorbent area 41 to the rear liquid storage area 43. The upper surface of the top layer 2 is sprayed with a marking layer 8 to distinguish the orientation of the absorbent core 4.

[0032] By using SAP gradient matching to match menstrual flow distribution, redundancy in the front section and saturation in the back section are avoided. The middle section diversion zone 42 quickly diverts the liquid to the high-capacity storage zone 43 in the back section, solving the side leakage caused by liquid retention in the middle section. The label layer intuitively distinguishes the front and back sections, making it easy for users to wear. It ensures that the high flow area is aligned with the back storage zone 43, reducing the amount of SAP used in the front section (reducing the amount by 30%) and accurately matching functional requirements.

[0033] In this embodiment, the marking layer 8 consists of two spray lines spaced apart on the upper surface of the surface layer, located at both ends of the length direction of the absorbent core. Each spray line is red and blue, with red representing the front side and blue representing the rear side.

[0034] The multi-colored spray lines spaced at intervals on the surface make it easy for users to distinguish the front and back when wearing the garment, ensuring correct wearing. The linear spray lines do not affect breathability and are not located in areas that come into direct contact with liquids, thus preventing the spray lines from spreading and staining.

[0035] The flow guiding layer 2 is made of 6D-8D PP and PE bicomponent coarse denier flow guiding fibers. The coarse denier flow guiding fibers enhance the capillary force of the flow guiding layer, allowing the liquid to diffuse rapidly to the downstream section.

[0036] The surface of the flow guiding layer 3 is provided with a plurality of through holes 31, each of which is distributed above the middle flow guiding area 42 and the rear liquid storage area 43. These through holes are used to accelerate the penetration of liquid into the absorption core 4 and increase the flexibility of the flow guiding layer 3, thus avoiding the problem of insufficient flexibility of the flow guiding layer 3 due to the use of coarse denier flow guiding fibers.

[0037] The width of the inner core 7 gradually increases from the front absorption area 41 to the rear liquid storage area 43. The free end of the inner core 7 in the rear liquid storage area 43 is an outwardly protruding arc-shaped edge, and a number of notches 71 are provided at intervals on the arc-shaped edge of the inner core 7.

[0038] The maximum width of the rear section is 15-20mm greater than that of the front section, preferably 15mm. The front is narrower to match the distance between the labia, and the rear is wider to cover the fluid accumulation area in the buttock crease, reducing the blind area of ​​side leakage and reducing the overall weight of the absorbent core by 4 grams. The inner core of the rear fluid storage area 43 has an outwardly protruding arc edge to increase the coverage area of ​​the rear fluid storage area 43. The spaced notches 71 can prevent wrinkles from forming when the rear fluid storage area 43 is bent due to the increased width.

[0039] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A zoned absorbent sanitary napkin, comprising a sanitary napkin body, wherein the sanitary napkin body comprises a top layer, a diversion layer, an absorbent core, and a bottom layer stacked from top to bottom, characterized in that: The absorbent core is divided into a front absorption zone, a middle flow guiding zone, and a rear liquid storage zone along its length. The absorbent core includes a coating layer and an inner core. The inner core is filled with SAP particles. The number of SAP particles in the inner core gradually increases from the front absorption zone to the rear liquid storage zone. The upper surface of the surface layer is sprayed with a marking layer to distinguish the orientation of the absorbent core.

2. The partitioned absorbent sanitary napkin according to claim 1, characterized in that: The marking layer consists of several spray lines spaced apart on the upper surface of the surface layer, each spray line having a different color.

3. A zoned absorbent sanitary napkin according to Claim 2 wherein: The spraying lines are two, located at both ends of the length direction of the absorbent core.

4. The zoned absorbent sanitary napkin of Claim 1 wherein: The flow guiding layer is made of 6D-8D PP or PE or PP and PE bicomponent coarse denier flow guiding fibers.

5. A zoned absorbent sanitary napkin according to Claim 4 wherein: The surface of the flow guiding layer is provided with a plurality of through holes, and each of the through holes is distributed above the middle flow guiding area and the rear liquid storage area.

6. The zoned absorbent sanitary napkin of Claim 1 wherein: The width of the inner core gradually increases from the front absorption area to the rear liquid storage area.

7. A zoned absorbent sanitary napkin according to Claim 6 wherein: The free end of the inner core of the rear liquid storage area is an outwardly protruding arc-shaped edge.

8. A zoned absorbent sanitary napkin according to claim 7, characterized in that: The inner core has several notches spaced apart on its arc-shaped edge.

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