Absorption product and sanitary towel

Abstract

The utility model relates to the technical field of absorption products, and particularly discloses an absorption product and a sanitary towel. The absorption product comprises a surface layer, a bottom layer and an absorption layer arranged between the surface layer and the bottom layer. The absorbent layer includes a first absorbent layer and a second absorbent layer. Wherein the length of the first absorption layer is smaller than that of the second absorption layer, and the thickness of the first absorption layer is smaller than or equal to that of the second absorption layer. Therefore, the first absorption layer can fit a user better, and the size requirements of different users can be met by matching with the second absorption layer; meanwhile, the first absorption layer can play a role in absorption and diversion, the possibility that absorbed substances are accumulated at the two ends of the absorption layer is reduced, liquid leaked from the two ends of the first absorption layer can be absorbed by the second absorption layer, the risk that the liquid leaks from the absorption layer is reduced, the thickness of the absorption layer is reduced, and the service life of the absorption layer is prolonged. Therefore, the comfort can be further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of absorbent articles, in particular to an absorbent article and sanitary napkin. BACKGROUND

[0002] An absorbent article is a structure capable of absorbing and containing liquid, exudates and other absorbed substances, which is widely used in personal care, medical and other fields. The absorbent article is generally a multi-layer structure, for example, the absorbent article of sanitary napkin, paper diaper and other products includes a surface layer, an absorbent layer and a bottom layer; wherein the surface layer allows the absorbed substance to pass through; the absorbent layer can absorb the absorbed substance; the bottom layer is used to prevent the absorbed substance from passing through.

[0003] In practical application, when the user performs vigorous exercise, such as running and jumping, the movement of the body will drive the movement of the muscles, which will change the distribution of the absorbed substance in the absorbent layer, such as the absorbed substance being squeezed to the two sides of the absorbent layer. In addition, when the user lies on one side for a long time due to sleep or other reasons, the absorbed substance will flow, and the flow of the absorbed substance will increase the risk of leakage of the absorbed substance from the absorbent layer. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an absorbent article and sanitary napkin for reducing the risk of leakage of the absorbed substance.

[0005] To achieve the above technical purpose, the first aspect of the present application provides an absorbent article, comprising: a surface layer, a bottom layer and an absorbent layer arranged between the surface layer and the bottom layer;

[0006] The absorbent layer comprises a first absorbent layer and a second absorbent layer;

[0007] The first absorbent layer is arranged on the side of the second absorbent layer closer to the surface layer;

[0008] Along the longitudinal direction of the absorbent article, the first absorbent layer is located in the second absorbent layer;

[0009] The thickness of the second absorbent layer is greater than or equal to the thickness of the first absorbent layer.

[0010] Further, the ratio of the length of the first absorbent layer to the length of the second absorbent layer is greater than or equal to 15%.

[0011] Further, along the longitudinal direction, the ratio of the length of the first absorbent layer to the length of the second absorbent layer ranges from 30% to 85%.

[0012] Further, along the transverse direction of the absorbent article, the first absorbent layer is located in the second absorbent layer.

[0013] Further, along the longitudinal direction, a front end and / or a rear end of the first absorption layer is provided with a first barrier structure;

[0014] The first barrier structure is arranged at a middle part of the first absorption layer along the transverse direction;

[0015] The first barrier structure is used to limit the passage of the absorbed substance.

[0016] Further, along the longitudinal direction, a front end and / or a rear end of the second absorption layer is provided with a second barrier structure;

[0017] The second barrier structure is arranged at a middle part of the second absorption layer along the transverse direction;

[0018] The second barrier structure is used to limit the passage of the absorbed substance.

[0019] Further, along the longitudinal direction, the first barrier structure is arranged at the rear end of the first absorption layer;

[0020] Along the longitudinal direction, the second barrier structure is arranged at the rear end of the second absorption layer;

[0021] Along the longitudinal direction, the first barrier structure is located in front of the second barrier structure.

[0022] Further, the first barrier structure is a hollow structure, a notch structure, or a low-density structure.

[0023] Further, the second barrier structure is a hollow structure, a notch structure, or a low-density structure.

[0024] Further, along the longitudinal direction, the first absorption layer is provided with a plurality of diffusion grooves at a position a predetermined distance from the rear end;

[0025] The diffusion grooves are arranged along the transverse direction.

[0026] Further, along the longitudinal direction, the diffusion grooves are located in front of the first barrier structure.

[0027] Further, the distance between the diffusion grooves and the first barrier structure is less than or equal to 20 mm.

[0028] Further, the ratio of the length of the diffusion grooves to the size of the first absorption layer along the transverse direction is in the range of 30% to 100%.

[0029] Further, the size of the first absorption layer along the transverse direction x is in the range of 30 mm to 80 mm;

[0030] The length of the diffusion grooves is in the range of 10 mm to 75 mm.

[0031] Further, a ratio of the thickness of the second absorbent layer to the thickness of the first absorbent layer ranges from 1:1 to 14:1.

[0032] Further, the sanitary napkin further comprises a flow guide layer.

[0033] The flow guide layer is arranged between the surface layer and the first absorbent layer.

[0034] Further, the first absorbent layer is provided with a flow guide area.

[0035] The flow guide area comprises a plurality of flow guide holes.

[0036] Further, a distance between the flow guide area and a front end of the first absorbent layer is less than a distance between the flow guide area and the first barrier structure.

[0037] Further, an aperture of the flow guide hole ranges from 1mm to 5.5mm.

[0038] Further, a ratio of an open area of the flow guide hole on the first absorbent layer to an area of the first absorbent layer ranges from 4% to 25%.

[0039] Further, a ratio of an open area of the flow guide hole on the first absorbent layer to an area of the first absorbent layer ranges from 10%.

[0040] Further, the second absorbent layer is provided with a cover layer covering an outer periphery thereof.

[0041] The second aspect of the present application provides a sanitary napkin comprising the absorbent article of any one of the above.

[0042] As can be seen from the above technical solutions, the present application provides an absorbent article and a sanitary napkin. The absorbent article comprises a surface layer, a bottom layer, and an absorbent layer arranged between the surface layer and the bottom layer. The absorbent layer comprises a first absorbent layer and a second absorbent layer. The length of the first absorbent layer is less than the length of the second absorbent layer, and the thickness of the first absorbent layer is less than or equal to the thickness of the second absorbent layer. This makes the first absorbent layer more conformable to the user and, in combination with the second absorbent layer, can adapt to the size requirements of different users. At the same time, the first absorbent layer can play a role in absorption and flow guidance, reducing the possibility of accumulation of absorbed substances at both ends of the absorbent layer, and the liquid leaked from both ends of the first absorbent layer can be absorbed by the second absorbent layer, thereby reducing the risk of liquid leakage from the absorbent layer and helping to reduce the thickness of the absorbent layer, thus further improving comfort. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0044] Figure 1 A top view of an absorbent article provided by an embodiment of the present application;

[0045] Figure 2 A partial side view cross-sectional view of an absorbent article provided by an embodiment of the present application;

[0046] Figure 3 A schematic view of an absorbent article provided by an embodiment of the present application, in which the length ratio of the first absorbent layer to the second absorbent layer is 30%;

[0047] Figure 4 A schematic view of an absorbent article provided by an embodiment of the present application, in which the length ratio of the first absorbent layer to the second absorbent layer is 15%;

[0048] Figure 5 A schematic view of an absorbent article provided by an embodiment of the present application, in which the first absorbent layer is provided with a barrier structure;

[0049] Figure 6 A schematic view of an absorbent article provided by an embodiment of the present application, in which the first absorbent layer and the second absorbent layer are provided with a barrier structure;

[0050] Figure 7 A schematic view of an absorbent article provided by an embodiment of the present application, in which the barrier structure is a hollow structure;

[0051] Figure 8 A schematic view of an absorbent article provided by an embodiment of the present application, in which the barrier structure is a notch structure;

[0052] Figure 9 A schematic view of an absorbent article provided by an embodiment of the present application, in which the first absorbent layer is provided with a diffusion groove;

[0053] In the drawings:

[0054] 10, surface layer; 11, surface layer;

[0055] 20, absorbent layer; 21, first absorbent layer; 22, second absorbent layer; 23, first barrier structure; 24, diffusion groove; 25, flow guide area; 26, second barrier structure;

[0056] 30, bottom layer;

[0057] x: transverse direction; y: longitudinal direction. DETAILED DESCRIPTION

[0058] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] An absorbent article is provided in the embodiments of the present application. As a structure capable of absorbing and containing liquid, semi-liquid or other absorbable substances, the absorbent article can be used in incontinence protection, sanitary napkins, panty liners, diapers, medical dressings and the like.

[0062] Please refer to Figure 1 With Figure 2 , Figure 1 is a top view of the absorbent article, Figure 2 is a partial side view cross-sectional view of the absorbent article; wherein, in the absorbent article shown, Figure 1 The absorbent article is described by taking a sanitary napkin as an example in an embodiment provided by the present application. In an embodiment provided by the present application, the absorbent article comprises a surface layer 10, a bottom layer 30 and an absorbent layer 20 arranged between the surface layer 10 and the bottom layer 30.

[0063] The surface layer 10 is used to contact the user, specifically the skin of the user, and can be partially or completely penetrated by the absorbed substance. In application, the surface layer 10 can include one or more surface layers 11. The surface layer 11 can be, for example, pure cotton cloth, non-woven fabric, silk, polyethylene film with perforations, etc.

[0064] The absorption layer 20 is used to absorb and contain the absorbed substance that penetrates from the surface layer 10. The thickness of the absorption layer 20 is generally thicker than that of the surface layer 10 to achieve effective absorption of the absorbed substance. In application, the absorption layer 20 can include one or more layers; the absorption layer 20 can include a fluff pulp layer, a high-absorbency polymer layer, etc.

[0065] The bottom layer 30 is used to prevent the absorbed substance from penetrating and can be used to connect the clothing of the user during use. For example, in sanitary napkin products, the bottom layer 30 can be used to adhere to the intimate clothing of the user, so that the product is not easily displaced during use of the user. In application, the bottom layer 30 can include a polyethylene film, a breathable bottom film, etc. The case with a breathable structure such as a breathable bottom film means that the bottom layer 30 has breathability, so that air or vapor can be discharged through the bottom layer 30, thereby improving the comfort of the user.

[0066] The absorption layer 20 includes a first absorption layer 21 and a second absorption layer 22; the first absorption layer 21 is laid on the side of the second absorption layer 22 closer to the surface layer 10; and the first absorption layer 21 is located in the second absorption layer 22 in the longitudinal direction y of the absorption article.

[0067] As shown in Figure 1 , the longer direction in the absorption article is the longitudinal direction, as shown by the y-axis direction in Figure 1 . Correspondingly, the shorter direction in the absorption article is the transverse direction, as shown by the x-axis direction in Figure 1 . In the actual application of sanitary napkin products, the longitudinal direction y of the product corresponds to the front-to-back direction of the user, and the transverse direction x of the product corresponds to the left-to-right direction of the user.

[0068] In this embodiment, the first absorption layer 21 is arranged between the surface layer 10 and the second absorption layer 22; one side of the first absorption layer 21 is the side of the second absorption layer 22 closer to the surface layer 10, and the other side of the second absorption layer 22 is the side farther away from the surface layer 10. Taking the case of placing the absorption article horizontally as an example, the first absorption layer 21 is arranged above the second absorption layer 22.

[0069] In the embodiment, the first absorption layer 21 is located in the second absorption layer 22 in the longitudinal direction y, that is, both ends of the first absorption layer 21 do not extend to the outside of the second absorption layer 22. Specifically, the length of the first absorption layer 21 can be configured to be less than the length of the second absorption layer 22, which helps the first absorption layer 21 to fit the user and reduces the occurrence of wrinkles and other situations caused by the length of the first absorption layer 21 being too long. Therefore, the user can have a better fit, reduce unnecessary contact between the first absorption layer 21 and other parts, and thus reduce the foreign body sensation to a certain extent and improve the overall comfort of the product. At the same time, the absorbed substances leaking from both sides of the first absorption layer 21 in the length direction can be absorbed by the second absorption layer 22, which can reduce the situation that the substances leaking from both ends of the first absorption layer 21 in the length direction directly leak to the outside of the absorption layer 20, and can also make the absorbed substances more concentrated in the middle of the second absorption layer 22, thereby reducing the risk of side leakage of the absorption layer 20 as a whole, and reducing the possibility of thickening the absorption layer due to high side leakage risk, which helps to reduce the overall thickness of the absorption layer 20 in actual application.

[0070] In the embodiment, the absorption layer 20 has the same thickness as the absorption layer of the existing product, and the second absorption layer 22 plays a main absorption role. Therefore, the length of the first absorption layer 21 has little effect on the overall absorption effect of the absorption layer 20, but the length of the first absorption layer 21 can effectively improve the overall comfort and ensure the absorption effect and reduce the risk of leakage of the absorbed substances while maintaining comfort.

[0071] In the embodiment, the thickness of the second absorption layer 22 is greater than or equal to the thickness of the first absorption layer 21, which can ensure the absorption effect of the second absorption layer 22.

[0072] Specifically, in actual application, the thickness ratio of the first absorption layer 21 and the second absorption layer 22 can be adjusted accordingly for different products, different models of the same product for different application objects.

[0073] For example, for sanitary napkins, the thickness of the second absorption layer 22 can be set to be equal to the thickness of the first absorption layer 21 in models developed for less absorbed substances. In models developed for more absorbed substances, the thickness of the second absorption layer 22 can be set to be greater than the thickness of the first absorption layer 21 to meet the absorption demand.

[0074] In the case that the thickness of the second absorption layer 22 is greater than the thickness of the first absorption layer 21, the thinner first absorption layer 21 is more helpful to fit the user, reduces the comfort impact caused by the overall thickness of the absorption layer 20, and is also helpful to the first absorption layer 21 to absorb the absorbed material more quickly and make the absorbed material quickly penetrate to the second absorption layer 22, so that the first absorption layer 21 plays a role of absorption and flow guide, reduces the amount of absorbed material diffused to the longitudinal direction y side and reduces the risk of side leakage, and improves the overall absorption efficiency. At the same time, since the thinner first absorption layer 21 is helpful to the penetration of the absorbed material, and the thicker second absorption layer 22 has enough space and absorption material to effectively absorb the absorbed material, it can also prevent the absorbed material from back penetration to the surface layer 10, which helps to reduce the humidity of the outside of the first absorption layer 21 and the surface layer 10, and keep the skin surface of the user dry.

[0075] At the same time, in the absorption article provided by the embodiment, in the case that the overall size of the absorption article remains unchanged, the length of the second absorption layer 22 can be maintained as the original size to correspond to the users with this part of size demand; and since the length of the first absorption layer 21 is shorter than that of the second absorption layer 22, the absorption article can also be adapted to the users with small product size demand, so that the adaptability of the absorption article is wider.

[0076] It should be noted that in actual application, the specific thickness of the first absorption layer 21 and the second absorption layer 22 can be set according to different product demands, and therefore the specific thickness size is not described in the embodiment.

[0077] In one embodiment, along the longitudinal direction y, the ratio of the length of the first absorption layer 21 to the length of the second absorption layer 22 is greater than or equal to 15%.

[0078] Specifically, for different demand products, the length of the first absorption layer 21 can be set according to the demand. For example, in the embodiment shown in FIG. 1, the length of the first absorption layer 21 is 85% of the length of the second absorption layer 22. Figure 3 In the embodiment shown in FIG. 2, the length of the first absorption layer 21 is 30% of the length of the second absorption layer 22. Figure 4 In the embodiment shown in FIG. 3, the length of the first absorption layer 21 is 15% of the length of the second absorption layer 22. Figure 1 In the embodiment shown in FIG. 3, the length of the first absorption layer 21 is 15% of the length of the second absorption layer 22.

[0079] It should be noted that in actual application, the distance between the two ends of the first absorption layer 21 along the longitudinal direction y and the distance between the two ends of the second absorption layer 22 along the longitudinal direction y can be different distances, for example, the distance between the front end of the first absorption layer 21 and the front end of the second absorption layer 22 is greater than the distance between the rear end of the first absorption layer 21 and the rear end of the second absorption layer 22.

[0080] Preferably, the ratio of the length of the first absorbent layer 21 to the length of the second absorbent layer 22 is 30% to 85%.

[0081] In one embodiment, as shown in Figure 3 、 Figure 4 and Figure 5 , the first absorbent layer 21 is located within the second absorbent layer 22 along the transverse direction x of the absorbent article, that is, in this embodiment, the width of the first absorbent layer 21 is smaller than the width of the second absorbent layer 22, and both ends of the first absorbent layer 21 along the transverse direction x do not extend outside the second absorbent layer 22.

[0082] In actual application, the first absorbent layer 21 and the second absorbent layer 22 are generally arranged in the center, so in the case where the length and width of the first absorbent layer 21 are both smaller than the corresponding dimensions of the second absorbent layer 22, the side edges of the first absorbent layer 21 along the transverse direction x and the side edges along the longitudinal direction y are all located inside the second absorbent layer 22.

[0083] In this embodiment, since the width of the first absorbent layer 21 is smaller than that of the second absorbent layer 22, on the basis of the above-mentioned embodiment, the first absorbent layer 21 can further reduce the short-time stay of the absorbed substance, further improve the absorption efficiency of the second absorbent layer 22, and further avoid the lateral diffusion of the absorbed substance in the first absorbent layer 21, so in addition to improving the fitting degree, it can also reduce the possibility of the absorbed substance accumulating in the outer periphery of the absorbent layer 20, and further control the risk of side leakage.

[0084] In one embodiment, the size of the first absorbent layer 21 along the transverse direction x is 30mm to 80mm. The present inventors have found that the width of the first absorbent layer 21 in the range of 30mm to 80mm can meet the fitting needs of the product. It should be noted that the product size in this embodiment can be applied to sanitary napkin products, and the width of the second absorbent layer 22 is not limited in this embodiment, as long as it meets the requirements of the above-mentioned embodiments.

[0085] In application, the end of the absorbent article close to the user's abdomen is the front end, and the end close to the user's back is the back end.

[0086] In one embodiment, as shown in Figure 6 , along the longitudinal direction y, the front end and / or the back end of the first absorbent layer 21 is provided with a first blocking structure 23; the first blocking structure 23 is arranged at the middle of the first absorbent layer 21 along the transverse direction x; the first blocking structure 23 is used to limit the passage of the absorbed substance.

[0087] Since the first blocking structure 23 is only arranged at the middle of the width direction of the first absorbent layer 21, both ends of the first blocking structure 23 along the transverse direction x are structures that can guide the flow.

[0088] The first blocking structure 23 can reduce the accumulation of the absorbed substance in the middle of the rear end of the first absorption layer 21, and since the two ends of the first blocking structure 23 are flow guiding structures, the absorbed substance can be guided to diffuse from both sides, reducing the risk of leakage of the first absorption layer 21 from the front end and / or the rear end.

[0089] In another embodiment based on the above-mentioned embodiment, please refer to Figure 6 , along the longitudinal direction y, the front end and / or the rear end of the second absorption layer 22 is provided with a second blocking structure 26 in the middle along the transverse direction x; the second blocking structure 26 is used to limit the passage of the absorbed substance.

[0090] Among them, the first blocking structure 23 and the second blocking structure 27 limit the passage of the absorbed substance, which means that they can prevent the flow of the absorbed substance or can reduce the flow rate of the absorbed substance flowing through the area where they are located.

[0091] Similarly, since the second blocking structure 26 is only arranged in the middle of the width direction of the second absorption layer 22, the two ends of the second blocking structure 26 along the transverse direction x are flow guiding structures, so that the second blocking structure 26 can block the flow of the second absorption layer 22 and guide the absorbed substance to the two ends of the second absorption layer 22, reducing the risk of leakage from the front end and / or the rear end of the second absorption layer 22.

[0092] In practical application, the inventor found that in the case of more absorbed substances, the risk of leakage from the rear end is greater than that from the front end. Therefore, in one embodiment, as shown in Figure 7 , along the longitudinal direction y, the first blocking structure 23 is only arranged in the rear end of the first absorption layer 21. Along the longitudinal direction y, the second blocking structure 26 is only arranged in the rear end of the second absorption layer 22. And along the longitudinal direction y, the first blocking structure 23 is located in front of the second blocking structure 26, which makes the absorbed substance that seeps from both ends of the first blocking structure 23 in the first absorption layer 21 can be absorbed by the second absorption layer 22, avoiding the leakage of this part of the absorbed substance due to the blockage of the second blocking structure 26. Therefore, in this embodiment, the second blocking structure 26 can effectively reduce the risk of leakage of the absorbed substance from the rear end of the absorption layer 20 while less affecting the absorption effect of the absorbed substance on the absorption layer 20.

[0093] As an embodiment, the first blocking structure 23 and / or the second blocking structure 26 can be a flow blocking structure, for example, can be made of the same material as the bottom layer 30 and laid on the first absorption layer 21 and / or the second absorption layer 22 to achieve its flow blocking effect.

[0094] As an embodiment, please refer to Figure 8In some embodiments, the first blocking structure 23 and / or the second blocking structure 26 can be a hollow structure. For example, the hollow structure can be formed by cutting, punching, or the like, such that the absorbed substance cannot flow through the hollow structure.

[0095] As an embodiment, please refer to Figure 8 , the first blocking structure 23 and / or the second blocking structure 26 can be a notch structure. For example, the notch structure can be formed by cutting or the like to remove the middle part of the rear end of the first absorbing layer 21 and / or the second absorbing layer 22, so as to form a notch, so that the absorbed substance cannot flow through the area of the hollow structure, thereby achieving the effect of blocking the flow.

[0096] As an embodiment, the first blocking structure 23 and / or the second blocking structure 26 can be a low-density structure. Specifically, the density of the first blocking structure 23 is lower than the density of other regions of the first absorbing layer 21; the density of the second blocking structure 26 is lower than the density of other regions of the second absorbing layer 22. Since the region with higher density has stronger adsorption, it can limit the flow of the absorbed substance, so that the absorbed substance flows more to the region with high density, reducing the risk of leakage from the front end and / or the rear end.

[0097] In the embodiment in which the first blocking structure 23 and the second blocking structure 26 are notch structures, as shown in Figure 9 , the notch structure also makes the rear end of the first absorbing layer 21 and / or the second absorbing layer 22 form a W-shaped structure.

[0098] Taking the rear end of the first absorbing layer 21 forming a W-shaped structure as an example, in addition to the above-mentioned effect of reducing the risk of leakage from the rear end, the W-shaped rear end helps the first absorbing layer 21 to fit the user's buttocks, especially in the motion state of the user walking, etc., which can reduce the offset of the first absorbing layer 21 and the overall absorbing article relative to the user and reduce the discomfort caused by friction.

[0099] In the case where the rear end of the second absorbing layer 22 also forms a W-shaped structure, for the same reason as above, the comfort of the user can be improved, which is not described in detail in this embodiment.

[0100] In another embodiment provided in the present application, please refer to Figure 9 , a plurality of diffusion grooves 24 are arranged at a predetermined distance from the rear end of the first absorbing layer 21 along the longitudinal direction y; the diffusion grooves 24 are arranged along the transverse direction x, that is, the length direction of the diffusion grooves 24 is the transverse direction x. The number of diffusion grooves 24 and the predetermined distance can be adjusted according to the product size in actual application, which is not specifically limited in this embodiment.

[0101] The diffusion groove 24 can function as a lateral diffusion, and can help to guide the absorbed substance to diffuse along the lateral ends of the absorption layer 20.

[0102] In a more specific embodiment, the diffusion groove 24 is located at the front end of the first blocking structure 23, so that the absorbed substance is diffused by the diffusion groove 24 before diffusing to the first blocking structure 23, and the flow guiding and diffusion effect of the first absorption layer 21 on the absorbed substance is more uniform, and the local accumulation is reduced.

[0103] In practical applications, the inventor has found that when the diffusion groove 24 and the blocking structure 23 are far away from each other, the correlation between them is small. Therefore, in one embodiment, the distance between the diffusion groove 24 and the blocking structure 23 is less than or equal to 20 mm, so that the absorbed substance diffused by the diffusion groove 24 can diffuse to the two ends of the blocking structure 23 along the lateral direction x.

[0104] In one embodiment, the ratio of the length of the diffusion groove 24 to the size of the first absorption layer 21 along the lateral direction x is in the range of 30% to 100%.

[0105] As an implementation, the length of the diffusion groove 24 is configured to be less than the width of the first absorption layer 21, so as to reduce the leakage of the absorbed substance from the width direction of the first absorption layer 21.

[0106] As an implementation, when the first absorption layer 21 is adapted to have a width less than the second absorption layer 22, the length of the diffusion groove 24 is allowed to be configured to be equal to the width of the first absorption layer 21.

[0107] As an implementation, on the basis that the width of the first absorption layer 21 is in the range of 30 mm to 80 mm, the length of the diffusion groove 24 is in the range of 10 mm to 75 mm.

[0108] In practical applications, the inventor has found that under the above size relationship, the diffusion effect of the absorbed substance is more uniform.

[0109] It should be noted that the outer periphery of the first absorption layer 21 can be an arc structure, so that the size of the first absorption layer 21 along the lateral direction x is not consistent at different positions. In this embodiment, the size of the first absorption layer 21 along the lateral direction x can be configured to be in the range of 30 mm to 80 mm.

[0110] In applications, the number of diffusion grooves 24 can be one or more. In the case of multiple diffusion grooves 24, different diffusion grooves 24 can be arranged in different longitudinal directions of the first absorption layer 21, and the lengths of different diffusion grooves 24 can not be equal.

[0111] In other embodiments provided in the present application, the ratio of the thickness of the second absorption layer 22 to the thickness of the first absorption layer 21 ranges from 1:1 to 14:1.

[0112] Specifically, for the products with a large amount of absorbed substances, the thickness of the second absorption layer 22 is allowed to be configured as 14 times of the thickness of the first absorption layer 21.

[0113] In an embodiment, the absorbent article further comprises a flow guide layer; the flow guide layer is arranged between the surface layer 10 and the first absorption layer 21.

[0114] The flow guide layer is used to guide the absorbed substances permeated by the surface layer 10 to the absorption layer 20, so as to reduce the residence time of the absorbed substances on the surface layer 10 and improve the absorption efficiency.

[0115] In another embodiment, referring to ​ , the first absorption layer 21 is provided with a flow guide area 25; the flow guide area 25 comprises a plurality of flow guide holes. The first absorption layer 21 provided with the flow guide area 25 can play a role of preliminary absorption and flow guide. The flow guide holes can penetrate the first absorption layer 21 along the thickness direction of the first absorption layer 21.

[0116] Specifically, the first absorption layer 21 in the embodiment can be used for rapid permeation of the absorbed substances, and has the absorption function for the surface layer 10, so as to simplify the structure of the absorbent article and improve the comfort of the absorbent article.

[0117] In an embodiment, the distance between the flow guide area 25 and the front end of the first absorption layer 21 is less than the distance between the flow guide area 25 and the first barrier structure 23, so that the flow guide effect of the front end of the first absorption layer 21 is more obvious than that of the rear end. In the case that the first barrier structure 23 is arranged only at the rear end of the first absorption layer 21, the flow guide area 25 can be used to realize rapid flow guide while reducing the risk of side leakage at the front end.

[0118] In an embodiment, the aperture of the flow guide hole ranges from 1 mm to 5.5 mm. The flow guide hole can be formed by a punching process.

[0119] The inventor finds that the flow guide hole with the aperture ranging from 1 mm to 5.5 mm can meet the flow guide requirement of the absorbed substances in the sanitary napkin product.

[0120] In actual application, if the ratio of the opening area of the flow guide hole to the area of the first absorption layer 21 is too large, the deformation risk of the first absorption layer 21 is large, which affects the appearance and the absorption effect of the first absorption layer 21 on the surface layer 10, and is not conducive to the drying of the surface layer 10.

[0121] In one embodiment, the ratio of the open area of the flow guide holes on the first absorption layer 21 to the area of the first absorption layer 21 is 4% to 25%, which can meet the rapid penetration requirement of the absorbed substance while having the absorption effect on the surface layer 10.

[0122] Preferably, in one embodiment, the ratio of the open area of the flow guide holes on the first absorption layer 21 to the area of the first absorption layer 21 is 10%.

[0123] In one embodiment, the second absorption layer 22 is provided with a covering layer covering the outer periphery thereof.

[0124] In the present embodiment, the covering layer can be provided in the following manner, for example: in the production process, a covering layer with a length and width greater than the second absorption layer 22 is provided, and the second absorption layer 22 is laid on the covering layer, and then the covering layer is buckled to cover the outer periphery of the second absorption layer 22; wherein the second absorption layer 22 can be adapted to be 2mm to 25mm shorter than the covering layer at the front end and the rear end.

[0125] In actual application, the absorption layer 20 as a whole can be made by a buckling die process, and specifically can be integrally formed by a core buckling die, so that it does not need to go through a cutter cutting process.

[0126] In the present embodiment, the covering layer can further reduce the risk of leakage from the side edges of the second absorption layer 22.

[0127] The second aspect of the present application provides a sanitary napkin. The sanitary napkin comprises the absorption article in any of the above embodiments. In actual application, the sanitary napkin can further comprise wings, release paper, etc.

[0128] Based on the above, the sanitary napkin in the embodiments provided by the present application can be fitted to the user, and on the premise of meeting the absorption amount requirement and the adapted thickness, the absorption layer 20 in the sanitary napkin can be configured to have a lower thickness structure, and the leakage of the absorbed substance from the longitudinal two ends and / or the lateral two ends of the absorption layer 20 can be effectively reduced during use, and the sanitary napkin has the effects of high absorption efficiency, good absorption effect and high comfort.

[0129] The above is the preferred embodiment of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the examples, those skilled in the art can still modify the technical solutions described in the foregoing examples, or make equivalent replacements to some of the technical features, but any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An absorbent article characterized by, Comprising: a surface layer (10), a bottom layer (30), and an absorption layer (20) disposed between the surface layer (10) and the bottom layer (30); the absorption layer (20) comprises a first absorption layer (21) and a second absorption layer (22); the first absorption layer (21) is laid on the side of the second absorption layer (22) closer to the surface layer (10); along the longitudinal direction (y) of the absorption article, the first absorption layer (21) is located in the second absorption layer (22); the thickness of the second absorption layer (22) is greater than or equal to the thickness of the first absorption layer (21); along the longitudinal direction (y) of the absorption article, the ratio of the length of the first absorption layer (21) to the length of the second absorption layer (22) is greater than or equal to 15%.

2. The absorbent article of claim 1, wherein, Along the longitudinal direction (y), the ratio of the length of the first absorption layer (21) to the length of the second absorption layer (22) ranges from 30% to 85%.

3. The absorbent article according to claim 1 or 2, characterized in that Along the transverse direction (x) of the absorption article, the first absorption layer (21) is located in the second absorption layer (22).

4. The absorbent article of claim 1, wherein, Along the longitudinal direction (y), the front end and / or the rear end of the first absorption layer (21) is provided with a first barrier structure (23); the first barrier structure (23) is disposed in the middle of the first absorption layer (21) along the transverse direction (x); the first barrier structure (23) is used to limit the passage of absorbed substances.

5. The absorbent article of claim 4, wherein, Along the longitudinal direction (y), the front end and / or the rear end of the second absorption layer (22) is provided with a second barrier structure (26); the second barrier structure (26) is disposed in the middle of the second absorption layer (22) along the transverse direction (x); the second barrier structure (26) is used to limit the passage of absorbed substances.

6. The absorbent article of claim 5, wherein, Along the longitudinal direction (y), the first barrier structure (23) is disposed at the rear end of the first absorption layer (21); Along the longitudinal direction (y), the second barrier structure (26) is disposed at the rear end of the second absorption layer (22); Along the longitudinal direction (y), the first barrier structure (23) is located in front of the second barrier structure (26).

7. The absorbent article of claim 4, wherein, The first barrier structure (23) is a hollow structure, a notch structure, a low-density structure, or a flow-blocking structure.

8. The absorbent article of claim 5, wherein, The second barrier structure (26) is a hollow structure, a notch structure, a low-density structure, or a flow-blocking structure.

9. The absorbent article of any of claims 4 to 8, characterized in that, Along the longitudinal direction (y), the first absorption layer (21) is provided with a plurality of diffusion grooves (24) at a predetermined distance from the rear end; the diffusion grooves (24) are disposed along the transverse direction (x).

10. The absorbent article of claim 9, wherein, Along the longitudinal direction, the diffusion grooves (24) are located in front of the first barrier structure (23).

11. The absorbent article of claim 9, wherein, The distance between the diffusion grooves (24) and the first barrier structure (23) is less than or equal to 20 mm.

12. The absorbent article of claim 9, wherein, The ratio of the length of the diffusion grooves (24) to the size of the first absorption layer (21) along the transverse direction (x) ranges from 30% to 100%.

13. The absorbent article of claim 12, wherein, The size of the first absorption layer (21) along the transverse direction (x) ranges from 30 mm to 80 mm; The length of the diffusion trench (24) ranges from 10 mm to 75 mm.

14. The absorbent article of Claim 1 characterized in that, The ratio of the thickness of the second absorption layer (22) to the thickness of the first absorption layer (21) ranges from 1:1 to 14:

1.

15. The absorbent article of Claim 1 characterized in that, Further comprising: a flow guide layer; The flow guide layer is arranged between the surface layer (10) and the first absorption layer (21).

16. The absorbent article of any of claims 4 to 8, characterized in that, The first absorption layer (21) is provided with a flow guide area (25); The flow guide area (25) comprises a plurality of flow guide holes.

17. The absorbent article of Claim 16, wherein, The distance between the flow guide area (25) and the front end of the first absorption layer (21) is less than the distance between the flow guide area (25) and the first barrier structure (23).

18. The absorbent article of Claim 16, wherein, The aperture of the flow guide hole ranges from 1 mm to 5.5 mm.

19. The absorbent article of Claim 16, wherein, The ratio of the open area of the flow guide hole on the first absorption layer (21) to the area of the first absorption layer (21) ranges from 4% to 25%.

20. The absorbent article of Claim 19, wherein, The ratio of the open area of the flow guide hole on the first absorption layer (21) to the area of the first absorption layer (21) is 10%.

21. The absorbent article of Claim 1 characterized in that, The second absorption layer (22) is provided with a cover layer covering its outer periphery.

22. A sanitary napkin, characterized in that, The absorbent article according to any one of claims 1 to 21.

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