Elastic anti-tightening pull-ups

Abstract

The invention relates to the field of disposable hygienic products, in particular to elastic anti-tightening pull-ups which can form a stable buffer cavity, remarkably reduce skin pressure and have the advantages of being excellent in air permeability and comfort, a paper diaper body comprises an absorber and a clothes layer, and the absorber comprises a liquid-permeable surface layer, an absorption core layer and a liquid-tight bottom layer. The clothes layer comprises bottom layer non-woven fabric and two pieces of bulky non-woven fabric, the absorbers are distributed in the longitudinal middle of the upper surface of the clothes layer, the two pieces of bulky non-woven fabric are arranged in the front waist area and the rear waist area of the clothes layer respectively, the clothes layer is provided with a first composite area and a second composite area, the second composite area of the bottom layer non-woven fabric covers the upper surfaces of the bulky non-woven fabric, and the absorbers are arranged in the first composite area. 15-20 first waistline rubber bands with the stretching multiplying power being 2.8-3.2 times are arranged between the first composite area of the bottom-layer non-woven fabric and the bulky non-woven fabric, and 21-25 second waistline rubber bands with the stretching multiplying power being 2.2-2.6 times are arranged between the second composite area of the bottom-layer non-woven fabric and the bulky non-woven fabric.

Description

Technical Field

[0001] This invention relates to the field of disposable hygiene products, and more particularly to an elastic anti-slip-up panty. Background Technology

[0002] Pull-up diapers (also known as toddler diapers or training diapers) are widely used in infant and incontinence care due to their ease of wear and good fit. The structure of existing pull-up diapers generally includes an absorbent core and a fabric layer laminated to its outer surface. The upper and lower ends of the fabric layer are folded together and welded together at their transverse ends to form a diaper-like shape. The absorbent core, from top to bottom, comprises a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer, all stacked together. The absorbent core layer is made of a combination of loose non-woven fabric and superabsorbent polymer (SAP), or a mixture of wood pulp fiber and SAP wrapped in non-woven fabric, forming a single-piece structure for absorbing and retaining bodily excrement. The liquid-permeable top layer consists of a hydrophilic non-woven fabric and hydrophobic non-woven fabric fixed to both sides of the hydrophilic non-woven fabric. The hydrophilic non-woven fabric adheres to the upper surface of the absorbent core layer and is folded downwards to cover it. On both sides of the absorbent core layer, and adhered to the absorbent core layer on the liquid-impermeable bottom layer, it provides a comfortable and dry feeling when in contact with the body, while allowing liquid to pass freely into the lower absorbent core layer. The liquid-impermeable bottom layer is composed of a breathable and water-impermeable membrane and a hydrophobic non-woven fabric composite, used to keep the absorbed liquid in the absorbent core layer, thereby preventing the absorbed liquid from staining the wearer's pants. Usually, a waistband area is set on the upper part of the front and back clothing layers of the pull-up pants, so that the pull-up pants fit the waistband more closely during wear. This waistband area is usually composed of two layers of flexible materials with an elastic band extending laterally in between, forming a smooth or only slightly wrinkled surface.

[0003] However, when in use, the elastic band exerts significant pressure on the skin when stretched at a high ratio, especially on delicate skin like infants or adults who are bedridden for extended periods. This can easily leave noticeable red marks on the waist and abdomen, and may even cause skin damage. Furthermore, the flat waistband structure, when pressed tightly against the skin, has a large contact area, hindering air circulation in the waist area and potentially leading to localized stuffiness, dampness, rashes, or discomfort. Additionally, the highly elastic elastic band, which comes into direct contact with the skin or through a thin layer of non-woven fabric, lacks a cushioning medium, resulting in a stiff feel and requiring improvement in wearing comfort. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention provides an elastic anti-slip pant that can form a stable buffer cavity, significantly reduce skin pressure, and has excellent breathability and comfort.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An elastic anti-pull-up diaper includes a diaper body, the diaper body including an absorbent core and a clothing layer laminated thereon, the absorbent core including a liquid-permeable surface layer, an absorbent core layer and a liquid-impermeable bottom layer stacked from top to bottom, the clothing layer including a bottom non-woven fabric and two bulky non-woven fabrics, the longitudinal direction is defined as extending along the length direction of the bottom non-woven fabric and the transverse direction is defined as extending along its width direction, the bottom non-woven fabric has an upper edge and a lower edge distributed at both ends of the longitudinal direction, the bottom non-woven fabric has a front waist area, a back waist area and a crotch area distributed between the front waist area and the back waist area; The absorbent core is distributed longitudinally in the middle of the upper surface of the garment layer. Two bulky nonwoven fabrics are respectively located in the front and back waist areas of the garment layer, and distributed on both sides of the absorbent core. The area on the garment layer covered with the bulky nonwoven fabric is a first composite area. A second composite area is formed on the garment layer between the upper edge of the first composite area and the upper edge of the bottom nonwoven fabric, or between the lower edge of the first composite area and the lower edge of the bottom nonwoven fabric. The second composite area of ​​the bottom nonwoven fabric covers the upper surface of the bulky nonwoven fabric. 15-20 first waistband elastics with a stretch ratio of 2.8-3.2 are provided between the first composite area of ​​the bottom nonwoven fabric and the bulky nonwoven fabric. Each first waistband elastic is arranged side-by-side in the longitudinal direction, with a spacing of 8mm-15mm between adjacent first waistband elastics. The first waistband elastics are bonded to the bottom nonwoven fabric. Between the second composite zone of the woven fabric and the bulky nonwoven fabric, there are 21 to 25 second waist elastic bands with a stretch ratio of 2.2 to 2.6. Each second waist elastic band is arranged side by side in the longitudinal direction, and the distance between two adjacent second waist elastic bands is 3 mm to 8 mm. The second waist elastic bands are connected to the bottom nonwoven fabric and the bulky nonwoven fabric by point-discontinuous ultrasonic welding, so that an intermittent adhesive zone is formed on the bottom nonwoven fabric in the transverse direction. A non-adhesive zone is formed between two adjacent second waist elastic bands and between two adjacent adhesive zones. Under the retraction of the first waist elastic band and the second waist elastic band, the bottom nonwoven fabric and the bulky nonwoven fabric in the non-adhesive zone separate from each other and bulge outward, forming several three-dimensional bubble units arranged transversely along the front waist zone and the back waist zone. The interior of the three-dimensional bubble unit forms a buffer cavity, and the second waist elastic band is located in the depression between adjacent three-dimensional bubble units.

[0006] Furthermore, the height of the three-dimensional bubble unit is 2mm to 8mm, and the volume of the buffer cavity in its natural state is 50mm³ to 200mm³. When the pull-up pants are worn on the human body, the three-dimensional bubble unit is deformed by pressure, and the buffer cavity is compressed but not completely closed, thereby forming an air circulation channel between the skin and the first waist elastic band.

[0007] Furthermore, the second composite area of ​​the bottom nonwoven fabric is provided with air vents, which are connected to the buffer cavity.

[0008] Furthermore, the bulky nonwoven fabric is a hot-air nonwoven fabric or an SMS composite nonwoven fabric with a basis weight of 20g / m² to 40g / m²; the bottom nonwoven fabric is a spunbond nonwoven fabric with a basis weight of 15g / m² to 30g / m²; the bulkiness of the bulky nonwoven fabric is greater than that of the bottom nonwoven fabric, and the thickness of the bulky nonwoven fabric is 1.5 to 3 times the thickness of the bottom nonwoven fabric.

[0009] Furthermore, the linear density of the first waist elastic band is 470 dtex to 940 dtex, and the linear density of the second waist elastic band is 280 dtex to 470 dtex; the first waist elastic band provides the basic contraction force for the front waist area and the back waist area, and the second waist elastic band assists in forming the morphological stability of the three-dimensional bubble unit.

[0010] Furthermore, the bonding area formed by the point-discontinuous ultrasonic welding connection is rectangular, elliptical, circular, or rhomboid, and the area of ​​each bonding area is 2mm² to 10mm²; the longitudinal distance between two adjacent bonding areas is 5mm to 12mm, and the transverse offset distance is 0mm to 5mm, so that the non-bonded area presents a continuous or discontinuous mesh distribution.

[0011] Furthermore, a third waist elastic band is also incorporated within the second composite area. The third waist elastic band is located above or below the second waist elastic band and has a stretch ratio of 1.5 to 2.0 times. It is used to form a gradient elastic zone to prevent the upper or lower edge of the pull-up pants waistband from curling up.

[0012] Furthermore, the absorbent core layer comprises a mixture of highly absorbent resin particles and fluff fibers. The longitudinal ends of the absorbent core layer extend into the front waist area and the back waist area, and the longitudinal ends of the absorbent core layer are located inside the first composite area, not covering the bulky nonwoven fabric area, so as to ensure the softness and breathability of the waist area.

[0013] Furthermore, the bottom nonwoven fabric has stress-relieving cuts or micropores at the junction of the second composite area and the non-adhesive area. The pore diameter of the micropores is 0.1mm to 0.5mm, which is used to release local stress during the repeated deformation of the three-dimensional bubble unit and prevent the bottom nonwoven fabric from breaking or delaminating.

[0014] By adopting the aforementioned technical solution, the beneficial effects of this invention are as follows: This elastic anti-slip-up trousers utilizes the low-ratio stretching and point-discontinuous welding of the second waistband elastic to force the bottom non-woven fabric and bulky non-woven fabric of the non-adhesive area 6 to arch outwards, allowing the highly elastic first waistband elastic to be hidden behind the bulky non-woven fabric and the three-dimensional bubble unit. This structurally achieves a fundamental transformation from traditional linear concentrated pressure to planar support pressure, effectively eliminating waist and abdominal marks to protect the delicate skin of infants and young children. Furthermore, the naturally constructed buffer cavity inside the bubble breaks the traditional... The flat, enclosed waistband creates an efficient airflow channel to accelerate the removal of moisture and heat, reducing the risk of rashes. At the same time, this design ensures that the skin only comes into contact with the fluffy, soft non-woven fabric protrusions rather than the rigid elastic band, giving the product a cloud-like soft touch. Furthermore, with the first waistband elastic band providing basic leak-proof shrinkage and the second waistband elastic band maintaining the bubble shape, it successfully balances excellent anti-slip and anti-leakage performance with long-lasting comfort and anti-binding effect, completely solving the technical problem of existing pull-up pants that are difficult to balance between fit and comfort. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a top view of the structure in the unfolded state in an embodiment of the present invention; Figure 3 This is a partial cross-sectional view of the front waist area and crotch area in an embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Absorbent core; 2. Clothing layer; 3. First waistband elastic; 4. Second waistband elastic; 5. Adhesive area; 6. Non-adhesive area; 7. 3D bubble unit; 8. Buffer cavity; 9. Ventilation holes; 10. First composite area; 11. Liquid-permeable surface layer; 12. Absorbent core layer; 13. Liquid-impermeable bottom layer; 20. Second composite area; 21. Bottom nonwoven fabric; 22. Bulk-filled nonwoven fabric; 30. Gradient elastic area; 31. Third waistband elastic; 32. Cut marks; 100. Diaper body; 201. Front waistband; 202. Back waistband; 203. Crotch area. Detailed Implementation

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0018] The embodiments of the present invention are as follows: refer to Figures 1 to 4As shown, an elastic anti-slip diaper includes a diaper body 100, which includes an absorbent core 1 and a clothing layer 2 laminated thereon. The absorbent core 1 includes a liquid-permeable surface layer 11, an absorbent core layer 12, and a liquid-impermeable bottom layer 13 stacked from top to bottom. The clothing layer 2 includes a bottom nonwoven fabric 21 and two bulky nonwoven fabrics 22. The direction of the bottom nonwoven fabric 21 is defined as the longitudinal direction along its length and the direction of its width as the transverse direction. The bottom nonwoven fabric 21 has an upper edge and a lower edge distributed at both ends of the longitudinal direction. The bottom nonwoven fabric 21 has a front waist area 201, a back waist area 202, and a crotch area 203 distributed between the front waist area 201 and the back waist area 202. The absorbent 1 is distributed in the longitudinal center of the upper surface of the garment layer 2. Two bulky nonwoven fabrics 22 are respectively located in the front waist area 201 and back waist area 202 of the garment layer 2, and are distributed on both sides of the absorbent 1 in the longitudinal direction. The area on the garment layer 2 covered with the bulky nonwoven fabric 22 is a first composite area 10. A second composite area 20 is formed on the garment layer 2 between the upper edge of the first composite area 10 and the upper edge of the bottom nonwoven fabric 21, or between the lower edge of the first composite area 10 and the lower edge of the bottom nonwoven fabric 21. The second composite area 20 of the bottom nonwoven fabric 21 covers the bulky nonwoven fabric. On the upper surface of fabric 22, 15-20 first waist elastic bands 3 with a tensile ratio of 2.8-3.2 are provided between the first composite area 10 of the bottom nonwoven fabric 21 and the bulky nonwoven fabric 21. Preferably, 20 first waist elastic bands 3 with a tensile ratio of 3.0 are provided between the first composite area 10 of the bottom nonwoven fabric 21 and the bulky nonwoven fabric 22. Each of the first waist elastic bands 3 is arranged side by side in the longitudinal direction, and the distance between two adjacent first waist elastic bands 3 is 8mm-15mm, preferably 12mm. The first waist elastic bands 3 are bonded to the bottom nonwoven fabric 21. The second composite area 20 of the bottom nonwoven fabric 21 is provided with 21 to 25 second waist elastic bands 4 with a tensile ratio of 2.2 to 2.6 between them and the bulky nonwoven fabric 22. Preferably, 25 second waist elastic bands 4 with a tensile ratio of 2.5 are provided between the second composite area 20 of the bottom nonwoven fabric 21 and the bulky nonwoven fabric 22. The second waist elastic bands 4 are arranged side by side in the longitudinal direction, and the distance between two adjacent second waist elastic bands 4 is 3 mm to 8 mm, preferably 7 mm. The second waist elastic bands 4 are connected to the bottom nonwoven fabric 21 and the bulky nonwoven fabric 22 by point-discontinuous ultrasonic welding. The connection creates intermittent adhesive areas 5 on the bottom nonwoven fabric 21 along the transverse direction. Non-adhesive areas 6 are formed between two adjacent second waist elastic bands 4 and between two adjacent adhesive areas 5. Under the retraction of the first waist elastic band 3 and the second waist elastic band 4, the bottom nonwoven fabric 21 and the bulky nonwoven fabric 22 in the non-adhesive area 6 separate from each other and bulge outward, forming several three-dimensional bubble units 7 arranged transversely along the front waist area 201 and the back waist area 202. The interior of the three-dimensional bubble unit 7 forms a buffer cavity 8, and the second waist elastic band 4 is located in the depression between adjacent three-dimensional bubble units 7.

[0019] This elastic anti-squeezing trousers utilizes the low-ratio stretching and point-discontinuous welding of the second waistband elastic 4 to force the bottom non-woven fabric 21 and the bulky non-woven fabric 22 in the non-adhesive area 6 to arch outwards. This allows the high-elasticity first waistband elastic 3 to be hidden behind the bulky non-woven fabric 22 and the three-dimensional bubble unit 7. Structurally, this achieves a fundamental transformation from traditional linear concentrated pressure to planar support pressure. It not only effectively eliminates waist and abdominal marks to protect the delicate skin of infants and young children, but also utilizes the naturally constructed buffer cavity 8 inside the bubble to break the stuffiness of a traditional flat waistband. In its enclosed state, it establishes an efficient air circulation channel to accelerate the removal of moisture and heat and reduce the risk of rashes. At the same time, this design ensures that the skin only comes into contact with the fluffy and soft non-woven fabric protrusions rather than the rigid elastic bands, giving the product a cloud-like soft touch. With the synergistic effect of the first waist elastic band 3 providing basic leak-proof shrinkage and the second waist elastic band 4 maintaining the bubble shape, it successfully balances excellent anti-slip and anti-leakage performance with long-lasting comfort and anti-binding effect, completely solving the technical problem of existing pull-up pants that are difficult to balance between fit and comfort.

[0020] Furthermore, the height of the three-dimensional bubble unit 7 is 2mm to 8mm, preferably 5mm, and the volume of the buffer cavity 8 in its natural state is 50mm³ to 200mm³, preferably 120mm³. When the pull-up pants are worn on the body, the three-dimensional bubble unit 7 is deformed under pressure, and the buffer cavity 8 is compressed but not completely closed, thereby forming an air circulation channel between the skin and the first waist elastic band 3. This ensures that the buffer cavity 8 has sufficient physical space to absorb the pressure on the skin. When the body moves or the waist band is compressed, the bubble undergoes elastic deformation but the cavity is not completely closed. This "micro-breathing" mechanism can continuously promote air convection during exercise, further enhancing the dynamic breathability of the waist area and ensuring continuous dryness.

[0021] Meanwhile, the second composite area 20 of the bottom nonwoven fabric 21 is provided with ventilation holes 9, which are connected to the buffer cavity 8. The addition of ventilation holes 9 connected to the buffer cavity 8 in the second composite area 20 constructs a complete microcirculation system of "external air, ventilation holes 9, buffer cavity 8, and skin surface". This design not only relies on natural gaps for ventilation, but also actively guides airflow through the multi-layer structure of the waistband through physical channels, which significantly improves the ventilation efficiency of the local environment and effectively prevents skin maceration caused by sweat accumulation.

[0022] Furthermore, the bulky nonwoven fabric 22 is a hot-air nonwoven fabric or an SMS composite nonwoven fabric, preferably a hot-air nonwoven fabric, with a basis weight of 20g / m² to 40g / m², more preferably 34g / m²; the bottom nonwoven fabric 21 is a spunbond nonwoven fabric, with a basis weight of 15g / m² to 30g / m², preferably 18g / m²; the bulkiness of the bulky nonwoven fabric 22 is greater than that of the bottom nonwoven fabric 21, and the thickness of the bulky nonwoven fabric 22 is... The bottom nonwoven fabric 21 is 1.8 times thicker. It uses a high-loft hot-air nonwoven fabric as a bulking layer, combined with a lower weight spunbond bottom layer. By utilizing the difference in bulk and thickness between the two, it is easier to form a full and three-dimensional bubble shape in the non-bonded area 6, and the elasticity is better. The bottom spunbond nonwoven fabric provides the necessary structural support to prevent the bubble from collapsing. The inner bulky nonwoven fabric provides an extremely skin-friendly feel, achieving a perfect balance between structural stability and wearing comfort.

[0023] In this embodiment, the linear density of the first waist elastic band 3 is 470 dtex to 940 dtex, preferably 680 dtex, and the linear density of the second waist elastic band 4 is 280 dtex to 470 dtex, preferably 350 dtex. The first waist elastic band 3 provides the basic contractile force for the front waist area 201 and the back waist area 202, while the second waist elastic band 4 assists in forming the morphological stability of the three-dimensional bubble unit 7. By differentiating the linear densities of the first waist elastic band 3 and the second waist elastic band 4, a precise division of functions is achieved. The thicker first waist elastic band 3 focuses on providing strong radial contractile force to ensure that the product fits the body curve and prevents side leakage and back sagging; the thinner second waist elastic band 4 focuses on finely controlling the wrinkling degree of the nonwoven fabric to assist in forming a uniform and delicate bubble texture.

[0024] Furthermore, the bonding area 5 formed by the point-discontinuous ultrasonic welding connection is rectangular, elliptical, circular, or rhomboid, preferably elliptical. The area of ​​each bonding area 5 is 2mm² to 10mm², preferably 8mm². The longitudinal distance between two adjacent bonding areas is 5mm to 12mm, preferably 10mm, and the transverse offset distance is 0mm to 5mm, preferably 3mm. This makes the non-bonded area 6 present a continuous or discontinuous mesh distribution, which can accurately control the stress distribution of the non-bonded area 6, thereby ensuring that the formed three-dimensional bubble unit 7 is uniform in size, neatly arranged, and has a more aesthetically pleasing appearance. Moreover, the mesh-distributed non-bonded area 6 and the staggered bonding points effectively disperse the local stress when the elastic retracts, preventing the non-woven fabric from breaking or delaminating due to stress concentration during repeated stretching, thus improving the durability of the product.

[0025] It is worth noting that a third waist elastic band 31 is also laminated within the second composite area 20. The third waist elastic band 31 is located above the second waist elastic band 4, and its stretch ratio is 1.5 to 2.0 times, preferably 1.8 times. It is used to form a gradient elastic zone 30 to prevent the upper or lower edge of the pull-up diaper waist from curling up. By using the third waist elastic band 31 with a low stretch ratio, a gradient elastic zone 30 is formed at the waist edge. The shrinkage force in this area is moderate, which can effectively offset the curling torque caused by the inconsistent shrinkage rates of the upper and lower layers of materials. This prevents the upper edge of the waist from turning outward or the lower edge from rolling inward, ensuring that the pull-up diaper waist remains flat and close-fitting when the baby is active. This avoids the friction and discomfort caused by the curled edge to the skin, while also maintaining the clean appearance of the product.

[0026] Furthermore, the absorbent core layer 12 comprises a mixture of highly absorbent resin particles and fluff fibers. The longitudinal ends of the absorbent core layer 12 extend into the front waist area 201 and the back waist area 202, and the longitudinal ends of the absorbent core layer 12 are located inside the first composite area 10, not covering the bulky nonwoven fabric 22 area, to ensure the softness and breathability of the waist area. By controlling the absorbent core layer 12 not to cover the bulky nonwoven fabric 22 area, it is ensured that the front waist area 201 and the back waist area 202 are completely composed of soft multi-layer nonwoven fabric and elastic bands, without interference from a hard core. This structural design gives the waist area excellent flexibility and extensibility, allowing it to deform freely with the bending and twisting of the infant's waist, without restricting movement or hurting the skin due to an overly hard core, while ensuring excellent breathability of the waist area.

[0027] In this embodiment, the bottom nonwoven fabric 21 is provided with stress relief cuts 32 or micropores at the junction of the second composite area 20 and the non-adhesive area 6, preferably cuts 32, to release local stress during the repeated deformation of the three-dimensional bubble unit 7, preventing the bottom nonwoven fabric 21 from breaking or delaminating. Setting stress relief cuts 32 in the junction area where stress is concentrated is equivalent to providing a "buffer valve" for the material. When the three-dimensional bubble unit 7 undergoes multiple compressions and rebounds during wear, these microstructures can effectively release the accumulated internal stress, preventing the bottom nonwoven fabric 21 from cracking, breaking or delaminating with the bulky nonwoven fabric 22 due to fatigue, thus ensuring the integrity and reliability of the anti-stretching structure throughout the entire service life.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. An elastic anti-pull-up diaper, comprising a diaper body, characterized in that: The diaper body includes an absorbent core and a garment layer laminated thereon. The absorbent core includes a liquid-permeable surface layer, an absorbent core layer, and a liquid-impermeable bottom layer stacked sequentially from top to bottom. The garment layer includes a bottom nonwoven fabric and two bulky nonwoven fabrics. The longitudinal direction is defined as extending along the length of the bottom nonwoven fabric, and the transverse direction is defined as extending along its width. The bottom nonwoven fabric has an upper edge and a lower edge distributed at both ends of the longitudinal direction. The bottom nonwoven fabric has a front waist area, a back waist area, and a crotch area distributed between the front waist area and the back waist area. The absorbent core is distributed longitudinally in the middle of the upper surface of the garment layer. Two bulky nonwoven fabrics are respectively located in the front and back waist areas of the garment layer, and distributed on both sides of the absorbent core. The area on the garment layer covered with the bulky nonwoven fabric is a first composite area. A second composite area is formed on the garment layer between the upper edge of the first composite area and the upper edge of the bottom nonwoven fabric, or between the lower edge of the first composite area and the lower edge of the bottom nonwoven fabric. The second composite area of ​​the bottom nonwoven fabric covers the upper surface of the bulky nonwoven fabric. 15-20 first waistband elastics with a stretch ratio of 2.8-3.2 are provided between the first composite area of ​​the bottom nonwoven fabric and the bulky nonwoven fabric. Each first waistband elastic is arranged side-by-side in the longitudinal direction, with a spacing of 8mm-15mm between adjacent first waistband elastics. The first waistband elastics are bonded to the bottom nonwoven fabric. Between the second composite zone of the woven fabric and the bulky nonwoven fabric, there are 21 to 25 second waist elastic bands with a stretch ratio of 2.2 to 2.

6. Each second waist elastic band is arranged side by side in the longitudinal direction, and the distance between two adjacent second waist elastic bands is 3 mm to 8 mm. The second waist elastic bands are connected to the bottom nonwoven fabric and the bulky nonwoven fabric by point-discontinuous ultrasonic welding, so that an intermittent adhesive zone is formed on the bottom nonwoven fabric in the transverse direction. A non-adhesive zone is formed between two adjacent second waist elastic bands and between two adjacent adhesive zones. Under the retraction of the first waist elastic band and the second waist elastic band, the bottom nonwoven fabric and the bulky nonwoven fabric in the non-adhesive zone separate from each other and bulge outward, forming several three-dimensional bubble units arranged transversely along the front waist zone and the back waist zone. The interior of the three-dimensional bubble unit forms a buffer cavity, and the second waist elastic band is located in the depression between adjacent three-dimensional bubble units.

2. The elastic anti-slip pants according to claim 1, characterized in that: The height of the three-dimensional bubble unit is 2mm to 8mm, and the volume of the buffer cavity in its natural state is 50mm³ to 200mm³. When the pull-up pants are worn on the human body, the three-dimensional bubble unit is deformed by pressure, and the buffer cavity is compressed but not completely closed, thereby forming an air circulation channel between the skin and the first waist elastic band.

3. The elastic anti-slip pants according to claim 2, characterized in that: The second composite area of ​​the bottom nonwoven fabric is provided with air vents, which are connected to the buffer cavity.

4. The elastic anti-slip pants according to claim 1, characterized in that: The bulky nonwoven fabric is a hot-air nonwoven fabric or an SMS composite nonwoven fabric with a basis weight of 20g / m² to 40g / m²; the bottom nonwoven fabric is a spunbond nonwoven fabric with a basis weight of 15g / m² to 30g / m²; the bulkiness of the bulky nonwoven fabric is greater than that of the bottom nonwoven fabric, and the thickness of the bulky nonwoven fabric is 1.5 to 3 times the thickness of the bottom nonwoven fabric.

5. The elastic anti-slip pants according to claim 1, characterized in that: The linear density of the first waist elastic band is 470 dtex to 940 dtex, and the linear density of the second waist elastic band is 280 dtex to 470 dtex. The first waist elastic band provides the basic contraction force for the front waist area and the back waist area, and the second waist elastic band assists in forming the morphological stability of the three-dimensional bubble unit.

6. The elastic anti-slip pants according to claim 1, characterized in that: The bonding area formed by the point-discontinuous ultrasonic welding connection is rectangular, elliptical, circular or rhomboid, and the area of ​​each bonding area is 2mm² to 10mm². The longitudinal distance between two adjacent bonding areas is 5mm to 12mm, and the transverse offset distance is 0mm to 5mm, so that the non-bonded area presents a continuous or discontinuous mesh distribution.

7. The elastic anti-slip pants according to any one of claims 1 to 6, characterized in that: The second composite area is further composited with a third waist elastic band, which is located above or below the second waist elastic band. The third waist elastic band has a stretch ratio of 1.5 to 2.0 times and is used to form a gradient elastic zone to prevent the upper or lower edge of the waistband of the pull-up pants from curling up.

8. The elastic anti-slip pants according to claim 7, characterized in that: The absorbent core layer comprises a mixture of highly absorbent resin particles and fluff fibers. The longitudinal ends of the absorbent core layer extend into the front and back waist areas, and the longitudinal ends of the absorbent core layer are located inside the first composite area, not covering the bulky nonwoven fabric area, to ensure the softness and breathability of the waist area.

9. The elastic anti-slip pants according to claim 8, characterized in that: The bottom nonwoven fabric has stress-relieving cuts or micropores at the junction of the second composite area and the non-adhesive area. The pore size of the micropores is 0.1mm to 0.5mm, which is used to release local stress during the repeated deformation of the three-dimensional bubble unit and prevent the bottom nonwoven fabric from breaking or delaminating.

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