Knitted sanitary napkin

Abstract

The application discloses a knitted fabric sanitary napkin, which comprises a surface layer, an absorbing layer and a bottom layer, wherein the absorbing layer comprises a first absorbing core and a second absorbing core, the first absorbing core is closer to the surface layer than the second absorbing core, a water-proof film is fixedly bonded between the first absorbing core and a flow guide layer, a through hole is formed in the first absorbing core, the through hole is mainly processed through a punching process, a flow guide hole which is communicated with the through hole is formed in the surface layer, and a water-proof film is arranged between the first absorbing core and the surface layer. The through hole is formed in the first absorbing core of the sanitary napkin, and the inner wall of the through hole is carbonized by using the punching process, so that the absorption efficiency of the inner wall of the through hole to the body fluid is reduced. In order to guide the body fluid to be better distributed, the flow guide hole which is communicated with the through hole is arranged in the flow guide layer, the body fluid is effectively guided to the second absorbing core, and better absorption and distribution effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of sanitary napkin technology, and specifically to a knitted sanitary napkin. Background Technology

[0002] In recent years, with increasing emphasis on human health and environmental protection, the exploration of new environmentally friendly, comfortable, and safe sanitary products has attracted much attention. Among them, knitted fabrics, with their excellent breathability, moisture absorption, and comfort, have become a highly sought-after new material for sanitary napkins.

[0003] While knitted sanitary napkins are generally safer and better suited for women, it's important to note that women's immunity is lowered during menstruation, making them more susceptible to bacterial infections. Furthermore, after absorbing menstrual fluid, movement can cause the sanitary napkin to be squeezed, leading to backflow and dampness at the skin's contact point, which can promote bacterial growth. Summary of the Invention

[0004] In order to solve at least one of the technical problems mentioned in the background art, the object of the present invention is to provide a knitted sanitary napkin that reduces backflow.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a knitted sanitary napkin, comprising:

[0006] Surface layer; the side that comes into contact with the skin;

[0007] The absorbent layer includes a first absorbent core and a second absorbent core. The first absorbent core is closer to the surface layer than the second absorbent core. A water-proof membrane is fixedly bonded between the first absorbent core and the flow guiding layer. The first absorbent core has through holes, which are mainly processed by hot-drilling. The surface layer has flow guiding holes that communicate with the through holes. A water-proof mold is provided between the first absorbent core and the surface layer.

[0008] The bottom layer is waterproof.

[0009] Furthermore, a first absorbent cotton layer is fixedly installed on the second absorbent core, and the first absorbent cotton layer is provided with hair columns passing through the through holes and the guide holes, wherein the hair columns are composed of multiple fine cotton filaments.

[0010] Furthermore, the first absorbent cotton layer is located in the middle of the second absorbent core.

[0011] Furthermore, the fiber pores of the first absorbent core are smaller than those of the second absorbent core.

[0012] Furthermore, a second absorbent cotton layer is provided on the bottom wall of the guide channel, and the two ends of the hair column are respectively connected to the first absorbent cotton layer and the second absorbent cotton layer.

[0013] Furthermore, the first absorbent core is larger than the second absorbent core, and the first absorbent core is a cap-shaped structure that covers the second absorbent core.

[0014] Furthermore, the surface layer is a flow guiding layer, and the flow guiding layer has flow guiding grooves along its length.

[0015] Furthermore, the flow guide groove is located in the middle of the flow guide layer, and both ends of the flow guide groove are arc-shaped.

[0016] Furthermore, a flow interception groove is provided on the flow guide layer and located around the flow guide groove, and a waterproof membrane is provided on the inner wall of the flow interception groove.

[0017] Furthermore, the surface layer is a flow guide layer.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: By opening through holes in the first absorbent core of the sanitary napkin and using hot-pressing processing to char the inner wall of the through holes, the absorption efficiency of the inner wall of the through holes for body fluids is reduced. In order to guide the body fluids to be better distributed, guide holes connected to the through holes are also provided inside the diversion layer, which effectively guides the body fluids to the second absorbent core, achieving better absorption and diversion effects, and preventing liquids from flowing back to the outer layer. At the same time, because the inner wall of the through holes is charred and cannot absorb body fluids, the first absorbent core will absorb a small amount of body fluids or even no body fluids before the second absorbent core is fully absorbed. Therefore, when the first absorbent core is not fully absorbed, reverse osmosis will not occur. When the second absorbent core is compressed, the squeezed liquid will be absorbed by the first absorbent core, reducing reverse osmosis. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the overall structural hierarchy of the present invention;

[0021] Figure 3 For the present invention in Figure 2 A magnified view of the structure at point A in the middle.

[0022] In the diagram: 1. Top layer; 2. Absorbent layer; 21. First absorbent core; 22. Second absorbent core; 23. Waterproof membrane; 24. Through hole; 25. Guide hole; 3. Bottom layer; 4. Guide groove; 5. Intercepting groove; 6. First absorbent cotton layer; 7. Hair column; 8. Second absorbent cotton layer. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1 and Figure 2 This embodiment provides a knitted sanitary napkin, including a surface layer 1, which consists of a diversion layer, an absorbent layer 2, and a bottom layer 3. The surface layer 1 is close to the skin, and the diversion layer, absorbent layer, and two bottom layers 3 are distributed thereafter.

[0025] The bottom layer 3 has excellent waterproof performance, effectively preventing leakage and making it safer and more reliable; at the same time, this waterproof layer also has good breathability, keeping the genital area dry and ventilated, improving the user's wearing comfort and hygiene experience.

[0026] The top layer 1 is made of pure cotton, which is less irritating to the skin. Pure cotton is also soft, absorbs water quickly, and keeps the surface dry and comfortable, providing a better user experience. The distribution layer has distribution channels 4 along its length. These channels 4 increase the temporary liquid retention capacity of the sanitary napkin, reducing leakage, and also increase the contact area between the distribution layer and the liquid, facilitating more efficient absorption and further reducing leakage.

[0027] Please see Figure 1 The guide channel 4 is located in the middle of the guide layer, and its two ends are arc-shaped, thereby increasing the contact area of ​​the guide channel 4 and improving the conductivity of transferring body fluid to the absorbent layer 2 below. To reduce the permeation of body fluid in the guide channel 4 through the inner wall of the guide channel 4 to the outside of the guide layer, a intercepting channel 5 is provided on the guide layer and around the guide channel 4. The inner wall of the intercepting channel 5 is provided with a waterproof membrane. When the liquid in the guide channel 4 permeates along the inner wall of the guide channel 4, it is blocked by the waterproof membrane on the side wall of the intercepting channel 5 when it permeates to the side wall of the intercepting channel 5, thereby reducing the permeation of body fluid to the outside of the guide layer. At the same time, the waterproof membrane has a certain degree of plasticity, which effectively improves the sanitary napkin's resistance to deformation, making the sanitary napkin more stable in shape during use, more in line with the body, and avoiding leakage problems caused by pressure deformation, thereby improving the comfort and use effect of the sanitary napkin.

[0028] The guiding layer is an antibacterial solution soaking layer. It can effectively inhibit bacterial growth, maintain vaginal hygiene, reduce the risk of gynecological infections, and improve the comfort and safety of using the product.

[0029] Please see Figure 2 and Figure 3The absorption layer 2 includes a first absorption core 21 and a second absorption core 22. The first absorption core 21 is closer to the flow guide layer than the second absorption core 22. A water-resistant membrane 23 is fixedly bonded between the first absorption core 21 and the flow guide layer. The first absorption core 21 has through holes 24, which are mainly formed by hot-drilling. As a result, the inner wall of the through holes 24 is charred, and water is difficult to be absorbed by the charred inner wall of the through holes 24. Therefore, the absorption efficiency of the inner wall of the through holes 24 for body fluid is low. The flow guide layer has a flow guide hole 25 connected to the through hole 24 at the inner wall of the flow guide groove 4.

[0030] Please see Figure 2 and Figure 3 By creating through-holes 24 in the first absorbent core 21 of the sanitary napkin and using a hot-pressing process to char the inner wall of the through-holes 24, the absorption efficiency of the inner wall of the through-holes 24 for bodily fluids is reduced. To guide bodily fluids for better distribution, guide holes 25 connected to the through-holes 24 are also provided inside the diversion layer, effectively guiding bodily fluids to the second absorbent core 22, achieving better absorption and diversion effects, preventing liquid from flowing back to the outer layer. At the same time, the slower absorption of the first absorbent core 21 can reduce the contact between backflow fluid and the skin, reducing the risk of infection.

[0031] To improve the absorption efficiency of the second absorbent core 22, a first absorbent cotton layer 6 is fixedly installed on the second absorbent core 22. The first absorbent cotton layer 6 has capillary columns 7 passing through the through-hole 24 and the guide hole 25, wherein the capillary columns 7 are composed of multiple fine cotton filaments. The capillary columns 7 rapidly guide the body fluid in the guide groove, thereby improving the absorption efficiency of the body fluid to the absorbent layer 2. The main principle is capillary action.

[0032] By fixing and installing the first absorbent cotton layer 6 with the hair column 7 on the second absorbent core 22, its absorption efficiency is effectively improved. The hair column 7 is composed of multiple fine cotton filaments, which form an interconnected flow guiding network through the through hole 24 and the flow guiding hole 25, and transfer the body fluid in the flow guiding groove 4 to the second absorbent core 22, thereby achieving a more efficient absorption effect.

[0033] Capillary action refers to the phenomenon where a wetting liquid rises in a narrow tube and a non-wetting liquid falls in a narrow tube. This phenomenon is caused by surface tension; when the cohesive forces between liquid molecules and the adhesive forces between liquid and solid molecules interact, the liquid level rises or falls.

[0034] To further improve the absorption efficiency of the absorbent cotton, a second absorbent cotton layer 8 is provided on the bottom wall of the guide channel 4, and the two ends of the hair column 7 are respectively connected to the first absorbent cotton layer 6 and the second absorbent cotton layer 8.

[0035] The second absorbent cotton layer 8 quickly absorbs the body fluid in the liquid guiding tank and then transfers it to the hair column 7, through which the body fluid is guided.

[0036] Please see Figure 2 The first absorbent cotton layer 6 is located in the middle of the second absorbent core 22. With the first absorbent cotton layer 6 positioned in the middle of the second absorbent core 22, when the hair column 7 absorbs and transfers the body fluid in the guide groove 4 to the first absorbent cotton layer 6, the surface layer 1 evenly diffuses the body fluid into the second absorbent core 22, where it is gradually absorbed. Under gravity, most of the liquid absorbed by the first absorbent cotton layer 6 will be absorbed by the lower half of the second absorbent core 22, while the remainder will be absorbed by the upper half. After the lower half of the second absorbent core 22 becomes saturated, the excess body fluid will be absorbed entirely by the upper half of the second absorbent core 22. Once the upper half of the second absorbent core 22 is also saturated, the side of the second absorbent core 22 closest to the first absorbent core 21 will permeate body fluid into the first absorbent core 21, where it will be absorbed.

[0037] That is, before the second absorber core 22 is fully absorbed, the first absorber core 21 will absorb a small amount of body fluid or even no body fluid. Therefore, when the first absorber core 21 is not fully absorbed, reverse osmosis will not occur, because the liquid squeezed out after the second absorber core 22 is pressed will be absorbed by the first absorber core 21.

[0038] Once the second absorbent core 22 is saturated, the first absorbent core 21 can efficiently absorb the permeate from the second absorbent core 22. The fiber pores of the first absorbent core 21 are smaller than those of the second absorbent core 22, thus creating a differential capillary effect. This means that the pressure in the fiber web with smaller pores is lower, while the pressure in the fiber web with larger pores is higher. The pressure difference between the first absorbent core 21 and the second absorbent core 22 causes the liquid to flow in a directional manner, from the high-pressure pores to the low-pressure pores. Therefore, after the second absorbent core 22 is saturated, the permeated body fluid will flow against gravity towards the first absorbent core 21, thereby improving the water absorption efficiency of the first absorbent core 21 in absorbing the permeate from the second absorbent core 22.

[0039] It is worth noting that the first absorbent core 21 is larger than the second absorbent core 22. The first absorbent core 21 is a cap-shaped structure that covers the second absorbent core 22. As a result, the body fluid that permeates through the second absorbent core 22 will be absorbed by the first absorbent core 21, reducing the possibility of leakage. The bottom layer 3 is larger than the first absorbent core 21, thereby preventing liquid leakage.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A knitted sanitary napkin, characterized in that, include: Surface layer (1); the surface layer (1) is a flow guide layer, the flow guide layer is an antibacterial original solution soaking layer, the side that comes into contact with the skin; Absorbent layer (2); including a first absorbent core (21) and a second absorbent core (22), the first absorbent core (21) is closer to the surface layer (1) than the second absorbent core (22), a water-proof membrane (23) is fixedly bonded between the first absorbent core (21) and the flow guide layer, a through hole (24) is opened on the first absorbent core (21), the through hole (24) is mainly processed by hot hole process, a flow guide hole (25) communicating with the through hole (24) is opened on the surface layer (1), and a water-proof membrane is provided between the first absorbent core (21) and the surface layer (1); The bottom layer (3) is waterproof. The fiber pores of the first absorbent core (21) are smaller than those of the second absorbent core (22), forming a differential capillary effect that causes the liquid to flow in a specific direction.

2. The knitted sanitary napkin according to claim 1, characterized in that, The surface layer (1) is a flow guide layer, and the flow guide layer has flow guide grooves (4) along its length.

3. The knitted sanitary napkin according to claim 2, characterized in that, The second absorbent core (22) is fixedly installed with a first absorbent cotton layer (6), and the first absorbent cotton layer (6) is provided with hair pillars (7) passing through the through hole (24) and the guide hole (25), wherein the hair pillars (7) are composed of multiple fine cotton filaments.

4. The knitted sanitary napkin according to claim 1, characterized in that, The first absorbent cotton layer (6) is located in the middle of the second absorbent core (22).

5. The knitted sanitary napkin according to claim 3, characterized in that, The bottom wall of the guide channel (4) is provided with a second absorbent cotton layer (8), and the two ends of the hair column (7) are respectively connected to the first absorbent cotton layer (6) and the second absorbent cotton layer (8).

6. The knitted sanitary napkin according to claim 1, characterized in that, The first absorbent core (21) is larger than the second absorbent core (22). The first absorbent core (21) is a cap-shaped structure that covers the second absorbent core (22).

7. The knitted sanitary napkin according to claim 2, characterized in that, The flow channel (4) is located in the middle of the flow layer, and the two ends of the flow channel (4) are arc-shaped.

8. The knitted sanitary napkin according to claim 2, characterized in that, A flow intercepting groove (5) is provided on the flow guiding layer and located outside the flow guiding groove (4), and a waterproof membrane is provided on the inner wall of the flow intercepting groove (5).

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