Pull-ups capable of preventing front leakage and rear leakage

Abstract

The pull-ups comprise a front waistline structure, a rear waistline structure and a crotch part, and the two ends of the crotch part are connected with the front waistline structure and the rear waistline structure respectively; the front waistline structure comprises a first front waistline layer, a second front waistline layer, a third front waistline layer, a first elastic body, a second elastic body and a fourth front waistline layer which are sequentially stacked from outside to inside; the rear waistline structure comprises a first rear waistline layer, a third elastic body, a second rear waistline layer, a third rear waistline layer, a fourth elastic body and a fourth rear waistline layer which are sequentially stacked from outside to inside, the third elastic body and the fourth elastic body are arranged in a staggered and spaced mode, and the third elastic body and the fourth elastic body both protrude inwards in the direction away from the first rear waistline layer. According to the front waistline structure, the waist of a user can be better wrapped and fixed, and the possibility that urine leaks from the front portion is reduced; the rear waistline structure can better adapt to the curve of the hip of the user, and the possibility that urine leaks from the rear portion is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of sanitary products, and in particular to a pair of pull-up pants that prevent front leakage and back leakage. Background Art

[0002] The waistline of traditional pull-up pants or diapers commonly seen on the market is usually made of two layers of non-woven fabric bonded together. However, this design has a significant flaw: when the user is lying down, the risk of urine leakage from the back increases significantly; on the contrary, if the user chooses to sleep on their stomach, the possibility of leakage from the front increases.

[0003] A search revealed that in the prior art, for example, patent CN201520550728.1 discloses a diaper that prevents front and back leakage, comprising a surface layer, a leak-proof bottom layer, and an absorbent core layer located between the surface layer and the leak-proof bottom layer. The diaper comprises a front waist portion, a back waist portion, and an intermediate portion located between the front waist portion and the back waist portion. The surface layer at the front waist portion is provided with a front leak-proof layer, and the surface layer at the back waist portion is provided with a back leak-proof layer. The front and back leak-proof layers can effectively prevent urine from leaking from the front or back of the diaper, thereby avoiding contamination of clothing or bedding. The above-mentioned diapers that prevent front and back leakage also have the following drawbacks in actual use:

[0004] The front and back leak-proof layers are made of the same material as the bottom leak-proof layer, which is a waterproof cotton layer that has been treated with a water-repellent treatment. While a diversion layer is provided between the surface layer and the absorbent core, the front and back leak-proof layers utilize a single waterproof cotton layer. This layer will, to a certain extent, hinder the rapid penetration and diffusion of urine, affecting the efficiency of the diversion layer. If urine is not promptly absorbed by the absorbent core, it may accumulate on the surface of the waterproof cotton layer, increasing the risk of leakage. Furthermore, because the waterproof cotton layer has been treated with water-repellent treatment, its breathability is significantly affected. Prolonged wear can cause the user's buttocks to become stuffy and damp, increasing the risk of skin problems such as diaper rash and diaper rash. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention aims to provide a pull-up pants that prevents front and back leakage. The pull-up pants prevents front and back leakage by partially bulging the first and second elastic bodies in the front waist structure to form a first bulge structure. This structure helps to better wrap and fix the user's waist, reducing the possibility of urine leakage from the front and reducing the risk of front leakage. The third and fourth elastic bodies in the back waist structure are staggered and spaced, and bulge inward to form a groove structure. This structure can better adapt to the curve of the user's buttocks, reducing the possibility of urine leakage from the back and reducing the risk of back leakage.

[0006] The present invention discloses a pull-up pants that prevents front and back leakage, comprising a front waist structure, a back waist structure, and a crotch portion, wherein two ends of the crotch portion are respectively connected to the front waist structure and the back waist structure;

[0007] The front waist structure comprises a first front waist layer, a second front waist layer, a third front waist layer, a first elastic body, a second elastic body and a fourth front waist layer stacked in sequence from outside to inside, and the front waist structure has portions of the first elastic body and the second elastic body bulging inwardly to form a first bulging structure;

[0008] The rear waist structure includes a first rear waist layer, a third elastic body, a second rear waist layer, a third rear waist layer, a fourth elastic body and a fourth rear waist layer stacked in sequence from the outside to the inside. The third elastic body and the fourth elastic body are staggered and spaced apart, and both the third elastic body and the fourth elastic body bulge inward away from the first rear waist layer, so that a groove structure is formed between the third elastic body and the fourth elastic body.

[0009] Preferably, the first elastomer and the third elastomer are both PE films.

[0010] Preferably, the second elastomer and the fourth elastomer are both spandex yarns.

[0011] Preferably, the first front waistline layer, the second front waistline layer, the third front waistline layer, the fourth front waistline layer, the first back waistline layer, the second back waistline layer, the third back waistline layer and the fourth back waistline layer are all non-woven fabrics.

[0012] Preferably, a water-absorbent core is provided in the middle portion of the crotch.

[0013] Preferably, a plurality of first gluing areas are arranged between the second front waistline layer and the third front waistline layer at intervals along the width direction of the front waistline structure, and adhesive for bonding the second front waistline layer and the third front waistline layer is sprayed on the first gluing areas, so that the second front waistline layer and the third front waistline layer form an intermittently bonded structure;

[0014] A plurality of second gluing areas are arranged between the second rear waistline layer and the third rear waistline layer at intervals along the width direction of the rear waistline structure, and an adhesive for compounding the second rear waistline layer and the third rear waistline layer is sprayed in the second gluing areas, so that the second rear waistline layer and the third rear waistline layer have an intermittent adhesive structure.

[0015] Preferably, a first glue-free area is formed between adjacent first glue-applied areas, and the width of the first glue-free area is less than or equal to the width of the water-absorbent core;

[0016] A second glue-free area is formed between adjacent second glue-applied areas, and the width of the second glue-free area is less than or equal to the width of the water-absorbent core.

[0017] Preferably, the first elastic body and the second elastic body are located at one end of the front waist structure close to the crotch portion;

[0018] The third elastic body is located at an end of the rear waist structure away from the crotch portion;

[0019] The fourth elastic body is located at one end of the rear waist structure close to the crotch portion.

[0020] Preferably, the width of the second front waistline layer is smaller than that of the first front waistline layer, and the widths of the first front waistline layer, the third front waistline layer and the fourth front waistline layer are equal;

[0021] The width of the second rear waistline layer is smaller than that of the first rear waistline layer, and the widths of the first rear waistline layer, the third rear waistline layer, and the fourth rear waistline layer are equal.

[0022] Preferably, the ratio of the area of ​​the first elastic body to the area of ​​the front waist structure is 1:3;

[0023] The ratio of the area of ​​the third elastic body to the area of ​​the rear waist structure is 1:3.

[0024] The advantages of the pull-up pants disclosed in the present invention that prevent front leakage and back leakage are:

[0025] The present invention discloses a pair of pull-up pants that prevent front and back leakage, comprising a front waist structure, a back waist structure and a crotch, with both ends of the crotch connected to the front waist structure and the back waist structure respectively; the front waist structure comprises a first front waist layer, a second front waist layer, a third front waist layer, a first elastic body, a second elastic body and a fourth front waist layer, which are sequentially stacked from the outside to the inside, and the front waist structure has parts of the first elastic body and the second elastic body that bulge inwardly to form a first bulge structure; the back waist structure comprises a first back waist layer, a third elastic body, a second back waist layer, a third back waist layer, a fourth elastic body and a fourth back waist layer, which are sequentially stacked from the outside to the inside, the third elastic body and the fourth elastic body are staggered and spaced apart, and both the third elastic body and the fourth elastic body bulge inwardly away from the first back waist layer, so that a groove structure is formed between the third elastic body and the fourth elastic body. The first and second elastic bodies in the front waist structure partially bulge inward to form a first bulge structure, which helps to better wrap and fix the user's waist, reduce the possibility of urine leakage from the front, and reduce the risk of front leakage; the third and fourth elastic bodies in the rear waist structure are staggered and spaced, and bulge inward to form a groove structure, which can better adapt to the curve of the user's buttocks, reduce the possibility of urine leakage from the rear, and reduce the risk of rear leakage; and the groove structure formed between the third and fourth elastic bodies not only helps to better fit the user's buttocks, but also improves the user's comfort when wearing it, and reduces the marks or discomfort caused by long-term wearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a pull-up pants that prevents front and back leakage according to the present disclosure;

[0027] Figure 2 This is a cross-sectional view of the front waist structure of the pull-up pants that prevent front and back leakage according to the present disclosure;

[0028] Figure 3 This is a cross-sectional view of the rear waist structure of the pull-up pants that prevent front and rear leakage as disclosed in the present invention.

[0029] Description of reference numerals:

[0030] 10-front waist structure; 101-first front waist layer; 102-second front waist layer; 103-third front waist layer; 104-first elastic member; 105-second elastic member; 106-fourth front waist layer;

[0031] 20-rear waist structure; 201-first rear waist layer; 202-third elastic member; 203-second rear waist layer; 204-third rear waist layer; 205-fourth elastic member; 206-fourth rear waist layer;

[0032] 30-crotch; 301-water-absorbent core. DETAILED DESCRIPTION

[0033] like Figure 1 - Figure 3 As shown, the pull-up pants for preventing front leakage and back leakage of the present disclosure include a front waist structure 10, a back waist structure 20 and a crotch portion 30, wherein the two ends of the crotch portion 30 are respectively connected to the front waist structure 10 and the back waist structure 20;

[0034] The front waist structure 10 includes a first front waist layer 101, a second front waist layer 102, a third front waist layer 103, a first elastic body 104, a second elastic body 105, and a fourth front waist layer 106, which are stacked in sequence from the outside to the inside. The first elastic body 104 and the second elastic body 105 of the front waist structure 10 are partially convex inwardly, forming a first convex structure; the first front waist layer 101, the second front waist layer 102, the third front waist layer 103, the first elastic body 104, the second elastic body 105, and the fourth front waist layer 106 are stacked and composited to form the front waist structure 10; with the side in contact with human skin as the inner side, the first elastic body 104 and the second elastic body 105 of the front waist structure 10 are partially convex inwardly, that is, convex toward the side in contact with human skin;

[0035] The back waist structure 20 includes a first back waist layer 201, a third elastic body 202, a second back waist layer 203, a third back waist layer 204, a fourth elastic body 205, and a fourth back waist layer 206, which are stacked in sequence from the outside to the inside. The third elastic body 202 and the fourth elastic body 205 are staggered and spaced apart, and both the third elastic body 202 and the fourth elastic body 205 bulge inwardly away from the first back waist layer 201, so that a groove structure is formed between the third elastic body 202 and the fourth elastic body 205. The first back waist layer 201, the third elastic body 202, the second back waist layer 203, the third back waist layer 204, the fourth elastic body 205, and the fourth back waist layer 206 are stacked and composited to form the back waist structure 20. With the side in contact with human skin as the inner side, the third elastic body 202 and the fourth elastic body 205 both bulge inwardly away from the first back waist layer 201, that is, bulge towards the side in contact with human skin.

[0036] The first elastic body 104 and the second elastic body 105 in the front waist structure 10 partially bulge inward to form a first bulge structure, which helps to better wrap and fix the user's waist, reduce the possibility of urine leakage from the front, and reduce the risk of front leakage; the third elastic body 202 and the fourth elastic body 205 in the rear waist structure 20 are staggered and spaced apart and bulge inward to form a groove structure, which can better adapt to the curve of the user's buttocks, reduce the possibility of urine leakage from the back, and reduce the risk of rear leakage; and the groove structure formed between the third elastic body 202 and the fourth elastic body 205 not only helps to better fit the user's buttocks, but also improves the user's comfort when wearing it, and reduces the marks or discomfort caused by long-term wearing.

[0037] Furthermore, in this embodiment, the first elastic body 104 and the third elastic body 202 are both made of PE film. PE film has excellent waterproof properties and can effectively prevent urine from penetrating, keeping the user's skin dry and comfortable. PE film also has a certain degree of air permeability, which helps reduce the dampness of the user's skin and reduces the risk of skin problems such as diaper rash.

[0038] In other optional embodiments, the first elastic body 104 and the third elastic body 202 may be made of highly water-resistant non-woven fabric.

[0039] Furthermore, in this embodiment, the second elastic body 105 and the fourth elastic body 205 are both spandex yarns; the optimal number of spandex yarns is 4, and the number of spandex yarns can be adjusted according to actual conditions;

[0040] Spandex yarn is made by polymerizing PTMEG (polytetramethylene ether glycol) and MDI (diisocyanate). Spandex yarn has excellent elasticity and elastic recovery rate, which makes the fabric made from it have good stretchability and recovery. Spandex yarn has fine fineness and high strength, which can meet a variety of textile processing needs.

[0041] Furthermore, in this embodiment, the first front waist layer 101, the second front waist layer 102, the third front waist layer 103, the fourth front waist layer 106, the first back waist layer 201, the second back waist layer 203, the third back waist layer 204 and the fourth back waist layer 206 are all non-woven fabrics; the non-woven fabrics can be heat-sealed non-woven fabrics or spunlace non-woven fabrics;

[0042] Heat-bonded non-woven fabrics are made by adding fibrous or powdered hot-melt bonding reinforcement materials into the fiber web, and then heating, melting, cooling and reinforcing them into cloth. This type of non-woven fabric has high strength and durability.

[0043] Spunlace nonwoven fabric is made by spraying high-pressure fine water flow onto one or more layers of fiber web, causing the fibers to entangle with each other, thereby strengthening the fiber web. Spunlace nonwoven fabric is soft and skin-friendly.

[0044] Furthermore, in this embodiment, a water-absorbing core 301 is provided in the middle portion of the crotch portion 30 for absorbing liquid.

[0045] Furthermore, in this embodiment, a plurality of first gluing areas are arranged between the second front waistline layer 102 and the third front waistline layer 103 along the width direction of the front waistline structure 10. An adhesive for bonding the second front waistline layer 102 and the third front waistline layer 103 is sprayed in the first gluing areas, so that an intermittent gluing structure is formed between the second front waistline layer 102 and the third front waistline layer 103.

[0046] A plurality of second gluing areas are arranged between the second rear waistline layer 203 and the third rear waistline layer 204 along the width direction of the rear waistline structure 20. An adhesive for bonding the second rear waistline layer 203 and the third rear waistline layer 204 is sprayed on the second gluing areas, so that an intermittent bonding structure is formed between the second rear waistline layer 203 and the third rear waistline layer 204.

[0047] The intermittent adhesive structure increases the softness and breathability of the front waist structure 10 and the back waist structure 20 to a certain extent, reducing friction and pressure, and improving wearing comfort. The intermittent adhesive structure allows a certain amount of expansion and contraction between the waist layers, which can better adapt to the changes in the user's body shape and reduce the sense of restraint and discomfort caused by body shape changes. From a production perspective, the intermittent adhesive structure can reduce the amount of adhesive used compared to the fully adhesive structure, thereby reducing production costs. At the same time, this adhesive application method also simplifies the production process, improving production efficiency and product qualification rate.

[0048] The adhesive may be hot melt adhesive, which has good adhesion, heat resistance and water resistance; in other optional embodiments, glue may also be selected for spraying.

[0049] Furthermore, in this embodiment, a first glue-free area is formed between adjacent first glue-applied areas, and the width of the first glue-free area is less than or equal to the width of the water-absorbent core 301. Since the first glue-free area is not glued, a certain height difference is formed between the unapplied first glue-free area and the glue-applied first glue-applied area on the horizontal plane, so that the first glue-free area has a concave groove-like structure. In order to better absorb liquid by the water-absorbent core 301, the front waist structure 10 is not glued in the area near the water-absorbent core 301, which is also the first glue-free area, so that the first glue-free area can drain. That is, when liquid flows into the front waist structure 10, it can flow back to the water-absorbent core 301 through the groove-like structure of the first glue-free area, so that the water-absorbent core 301 absorbs the liquid, further reducing the risk of front leakage.

[0050] A second glue-free area is formed between adjacent second glue-applied areas, and the width of the second glue-free area is less than or equal to the width of the water-absorbent core 301; since the second glue-free area is not glued, a certain height difference is formed between the unglue-applied second glue-free area and the glue-applied second glue-applied area on the horizontal plane, so that the second glue-free area has a concave groove structure. In order for the water-absorbent core 301 to better absorb water and liquid, the rear waist structure 20 is not glued in the area close to the water-absorbent core 301, which is also the second glue-free area, so that the second glue-free area can be drained, that is, when the liquid flows to the rear waist structure 20, it can flow back to the water-absorbent core 301 through the groove structure of the second glue-free area, so that the water-absorbent core 301 absorbs the liquid, further reducing the risk of rear leakage.

[0051] Furthermore, in this embodiment, the first elastic member 104 and the second elastic member 105 are located at one end of the front waist structure 10 near the crotch portion 30; that is, when worn, the front waist structure 10 has the first elastic member 104 and the second elastic member 105 near the lower end along the height direction;

[0052] The third elastic body 202 is located at an end of the rear waist structure 20 away from the crotch portion 30;

[0053] The fourth elastic body 205 is located at one end of the rear waist structure 20 near the crotch 30; that is, when worn, along the height direction, the rear waist structure 20 has the fourth elastic body 205 near the lower end, and the rear waist structure 20 has the third elastic body 202 near the upper end.

[0054] Furthermore, in this embodiment, the width of the second front waist layer 102 is smaller than the width of the first front waist layer 101, and the widths of the first front waist layer 101, the third front waist layer 103, and the fourth front waist layer are equal;

[0055] The width of the second rear waistline layer 203 is smaller than the width of the first rear waistline layer 201 , and the widths of the first rear waistline layer 201 , the third rear waistline layer 204 and the fourth rear waistline layer 206 are equal.

[0056] Furthermore, in this embodiment, the ratio of the area of ​​the first elastic body 104 to the area of ​​the front waist structure 10 is 1:3;

[0057] The ratio of the area of ​​the third elastic body 202 to the area of ​​the rear waist structure 20 is 1:3.

[0058] In summary, the following describes a specific manufacturing process of the front waist structure 10 and the back waist structure 20 of pull-up pants that prevent back leakage.

[0059] The specific manufacturing process of the front waist structure 10 is as follows:

[0060] The first front waistline layer 101 is the outer waistline, and the second front waistline layer 102 is the inner waistline. The width of the second front waistline layer 102 is smaller than that of the first front waistline layer 101. A first elastic body 104 is compounded on the inner side of the first front waistline layer 101. The first elastic body 104 is made of a PE film, and the ratio of the area of ​​the first elastic body 104 to the area of ​​the front waistline structure 10 is 1:3. A second elastic body 105 is compounded on the side of the first elastic body 104 away from the first front waistline layer 101. The second elastic body 105 is made of spandex yarn, and the number of the second elastic body 105 is 4.

[0061] The first front waist layer 101 is folded over to cover the first elastic body 104 and the second elastic body 105, and the front waist layer covering the first elastic body 104 and the second elastic body 105 forms the third front waist layer 103. The second front waist layer 102 is compounded on the inner side of the first front waist layer 101, and the second front waist layer 102 is arranged to avoid the first elastic body 104 and the second elastic body 105. Then, the part covering the first elastic body 104 and the second elastic body 105 is folded over to the second front waist layer 102 for compounding, and the front waist layer folded on the top is the fourth front waist layer 106, forming A first front waistline layer 101, a second front waistline layer 102, a third front waistline layer 103, a first elastic body 104, a second elastic body 105, and a fourth front waistline layer 106 are stacked in sequence to form a front waistline structure 10. One side of the first front waistline layer 101 is the outer side, and one side of the fourth front waistline layer 106 is the inner side. The first elastic body 104 and the second elastic body 105 of the front waistline structure 10 are convex inwardly to form a first convex structure. The first elastic body 104 and the second elastic body 105 are located at one end of the front waistline structure 10 near the crotch portion 30.

[0062] The portion covering the first elastic body 104 and the second elastic body 105 is folded over onto the second front waistline layer 102 for compounding. After being folded over, the third front waistline 103 is close to the second front waistline layer 102 and compounded with the second front waistline layer 102. Therefore, a plurality of first gluing areas are arranged at intervals along the width direction of the front waistline structure 10 between the second front waistline layer 102 and the third front waistline layer 103. An adhesive for compounding the second front waistline layer 102 and the third front waistline layer 103 is sprayed in the first gluing areas, so that an intermittent bonding structure is formed between the second front waistline layer 102 and the third front waistline layer 103. The adhesive can be a hot melt adhesive.

[0063] The first front waistline layer 101 , the second front waistline layer 102 , the third front waistline layer 103 and the fourth front waistline layer 106 are all nonwoven fabrics.

[0064] The specific manufacturing process of the rear waist structure 20 is as follows:

[0065] The first rear waistline layer 201 serves as the outer waistline, the second rear waistline layer 203 serves as the inner waistline, the width of the second rear waistline layer 203 is smaller than the width of the first rear waistline layer 201, and a third elastic body 202 is laminated on the inner side of the first rear waistline layer 201. The third elastic body 202 is made of a PE film, and the ratio of the area of ​​the third elastic body 202 to the area of ​​the rear waistline structure 20 is 1:3.

[0066] Next, the fourth elastic body 205 is compounded at a certain distance from the third elastic body 202. The fourth elastic body 205 is close to one end of the first rear waistline layer 201 and is made of spandex yarn, with four yarns. Then, the second rear waistline layer 203 is compounded, with the second rear waistline layer 203 and the fourth elastic body 205 avoiding each other and covering the third elastic body 202. The end of the first rear waistline layer 201 close to the fourth elastic body 205 is folded over to cover the fourth elastic body 205. The rear waistline layer covered on the fourth elastic body 205 forms the third rear waistline layer 204.

[0067] Then, the portion covered with the fourth elastic body 205 is folded over the second rear waist layer 203, so that the third rear waist layer 204 is in contact with the second rear waist layer 203 and the uppermost rear waist layer is folded to form the fourth rear waist layer 206; forming the first rear waist layer 201, the third elastic body 202, the second rear waist layer 203, the third rear waist layer 204, the fourth elastic body 205 and the fourth rear waist layer 206 stacked in sequence, and each layer is composited to form a rear waist structure 20, with one side of the first rear waistline layer 201 as the outer side and one side of the fourth rear waistline layer 206 as the inner side, and the third elastic body 202 and the fourth elastic body 205 both bulge inwardly away from the first rear waistline layer 201, so that a groove structure is formed between the third elastic body 202 and the fourth elastic body 205; and the third elastic body 202 is located at an end of the rear waistline structure 20 away from the crotch portion 30, and the fourth elastic body 205 is located at an end of the rear waistline structure 20 closer to the crotch portion 30;

[0068] The portion covered with the fourth elastic body 205 is folded over onto the second rear waist layer 203, so that the third rear waist layer 204 is in contact with and laminated to the second rear waist layer 203. A plurality of second gluing areas are arranged between the second rear waist layer 203 and the third rear waist layer 204 along the width direction of the rear waist structure 20. An adhesive for laminating the second rear waist layer 203 and the third rear waist layer 204 is sprayed in the second gluing areas, so that an intermittent adhesive structure is formed between the second rear waist layer 203 and the third rear waist layer 204. The adhesive can be a hot melt adhesive.

[0069] The first rear waistline layer 201 , the second rear waistline layer 203 , the third rear waistline layer 204 and the fourth rear waistline layer 206 are all nonwoven fabrics.

[0070] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure.

[0071] Those skilled in the art can make various other corresponding changes and deformations based on the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of this disclosure.

Claims

1. A pair of pull-up pants that prevents front and back leakage, characterized in that: It comprises a front waist structure (10), a rear waist structure (20) and a crotch portion (30), wherein two ends of the crotch portion (30) are respectively connected to the front waist structure (10) and the rear waist structure (20); The front waist structure (10) comprises a first front waist layer (101), a second front waist layer (102), a third front waist layer (103), a first elastic body (104), a second elastic body (105) and a fourth front waist layer (106) stacked in sequence from the outside to the inside, and the front waist structure (10) has portions of the first elastic body (104) and the second elastic body (105) bulging inward to form a first bulging structure; The rear waist structure (20) includes a first rear waist layer (201), a third elastic body (202), a second rear waist layer (203), a third rear waist layer (204), a fourth elastic body (205) and a fourth rear waist layer (206) stacked in sequence from the outside to the inside, the third elastic body (202) and the fourth elastic body (205) are staggered and spaced apart, and the third elastic body (202) and the fourth elastic body (205) both bulge inwardly away from the first rear waist layer (201), so that a groove structure is formed between the third elastic body (202) and the fourth elastic body (205).

2. The pull-up pants that prevent front and back leakage according to claim 1, characterized in that: The first elastomer (104) and the third elastomer (202) are both PE films.

3. The pull-up pants that prevent front leakage and back leakage according to claim 1, characterized in that: The second elastic body (105) and the fourth elastic body (205) are both spandex yarns.

4. The pull-up pants that prevent front and back leakage according to claim 1, characterized in that: The first front waist layer (101), the second front waist layer (102), the third front waist layer (103), the fourth front waist layer (106), the first back waist layer (201), the second back waist layer (203), the third back waist layer (204) and the fourth back waist layer (206) are all non-woven fabrics.

5. The pull-up pants that prevent front leakage and back leakage according to claim 1, characterized in that: The middle portion of the crotch portion (30) is provided with a water-absorbing core (301).

6. The pull-up pants that prevent front and back leakage according to claim 5, characterized in that: A plurality of first gluing areas are arranged at intervals along the width direction of the front waist structure (10) between the second front waist layer (102) and the third front waist layer (103), and an adhesive for compounding the second front waist layer (102) and the third front waist layer (103) is sprayed on the first gluing areas, so that the second front waist layer (102) and the third front waist layer (103) form an intermittent adhesive structure; A plurality of second gluing areas are arranged at intervals between the second rear waistline layer (203) and the third rear waistline layer (204) along the width direction of the rear waistline structure (20), and an adhesive for compounding the second rear waistline layer (203) and the third rear waistline layer (204) is sprayed in the second gluing areas, so that the second rear waistline layer (203) and the third rear waistline layer (204) have an intermittent adhesive structure.

7. The pull-up pants that prevent front leakage and back leakage according to claim 6, characterized in that: A first glue-free area is formed between adjacent first glue-applied areas, and the width of the first glue-free area is less than or equal to the width of the water-absorbent core (301); A second glue-free area is formed between adjacent second glue-applied areas, and the width of the second glue-free area is less than or equal to the width of the water-absorbent core (301).

8. The pull-up pants that prevent front leakage and back leakage according to claim 1, characterized in that: The first elastic body (104) and the second elastic body (105) are located at one end of the front waist structure (10) close to the crotch portion (30); The third elastic body (202) is located at one end of the rear waist structure (20) away from the crotch portion (30); The fourth elastic body (205) is located at one end of the rear waist structure (20) close to the crotch portion (30).

9. The pull-up pants that prevent front leakage and back leakage according to claim 1, characterized in that: The width of the second front waist layer (102) is smaller than the width of the first front waist layer (101), and the widths of the first front waist layer (101), the third front waist layer (103) and the fourth front waist layer are equal; The width of the second rear waistline layer (203) is smaller than the width of the first rear waistline layer (201), and the widths of the first rear waistline layer (201), the third rear waistline layer (204) and the fourth rear waistline layer (206) are equal.

10. The pull-up pants that prevent front leakage and back leakage according to claim 1, characterized in that: The ratio of the area of ​​the first elastic body (104) to the area of ​​the front waist structure (10) is 1:3; The ratio of the area of ​​the third elastic body (202) to the area of ​​the rear waist structure (20) is 1:3.

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