A kind of soft elastic waist pull-up pants

Abstract

The utility model proposes a pair of pull-up pants with flexible elastic waist, comprising an absorbent body and an elastic waist, wherein the elastic waist comprises a connecting portion and a waist portion, wherein the waist portions at both ends of the elastic waist are folded inward from the outside and then arranged at both ends of the absorbent body in the length direction to form the folded portions of the elastic waist, wherein a double-sided tunnel-type bubble structure is arranged in the folded portions; the utility model improves the fit of the pull-up pants by arranging fine-denier spandex yarns with various distribution amounts and distribution spacings in the first area, the second area, and the third area of ​​the waist portion, and increases the flexibility of the elastic waist by selecting fabrics with better flexibility to form inner and outer lining non-woven fabrics of the elastic waist, and then combining them with fine-denier spandex yarns, and thereby reduces the wrinkling phenomenon at the two ends of the absorbent body caused by the elastic waist being subjected to external force or natural stretching.

Description

Technical Field

[0001] The utility model relates to the field of disposable absorbent products, in particular to a pair of pull-on pants with soft elastic waist. Background Art

[0002] The main structure of pull-up pants is generally composed of an elastic waist and an absorbent body for absorbing liquid. The waist is usually made of elastic material, which is wrapped around the baby's waist to provide appropriate tightness to ensure that the pull-up pants can fit the baby's body closely and prevent urine from leaking sideways. To increase the comfort of the pull-up pants, the elastic waist is usually equipped with a plurality of spandex threads of different fineness, quantity and elasticity control. The elastic waist of existing pull-up pants has a relatively high density of spandex threads, a distinct convex structure of the composite product, and a relatively large amount of glue sprayed. The overall stress in the elastic part is relatively high, which seriously affects the comfort of the elastic waist and easily produces obvious marks on the baby's waist.

[0003] Based on the above situation, in the prior art, the patent with patent number CN215606904U discloses a one-piece waist soft pull-up pants, the front area of ​​the patent has a front waist area and a front crotch area connected in sequence along the longitudinal direction, the rear area has a rear waist area and a rear crotch area connected in sequence along the longitudinal direction, the front crotch area and the rear crotch area are respectively arranged close to the middle area, the front area and the rear area are respectively composed of an inner layer of non-woven fabric, an elastic band, and an outer layer of non-woven fabric in sequence, the stretching ratio of the elastic band in the front waist area and the rear waist area is 2.5 to 2.8 times, the number of elastic bands is 5 to 7, the denier of the elastic band is 620dtex, and the spacing is 5 to 20mm; the stretching ratio of the elastic band in the front crotch area and the rear crotch area is 3.0 to 3.2, the number of elastic bands in the front crotch area is 13 to 15, the number of elastic bands in the rear crotch area is 17 to 19, and the spacing between each elastic band in the front crotch area and the rear crotch area is 2 10mm; This patent solves the problems of poor softness, complex structure and poor fit of existing pull-up pants to a certain extent by designing different stretching ratios and different numbers of elastic bands in the front waist area and front crotch area of ​​the front area of ​​the outer layer, and the back waist area and back crotch area of ​​the back area, and designs the arrangement spacing of the elastic bands.

[0004] However, the pull-up pants of the above patent still have room for improvement. First, the fit of the pull-up pants needs to be improved. The elastic waistband is made by a two-stage tightening method of first loosening and then tightening in the front and rear areas of the pull-up pants. However, the dimension of the baby's abdomen tends to be small first, then large, and then small again. Therefore, after the baby wears the pull-up pants made of the two-stage tightening elastic waistband for a period of time, the elastic waistband at the trouser leg part will be turned inside out. Second, the flexibility of the elastic waistband in the pull-up pants needs to be improved. The elastic band denier and stretch ratio used in the pull-up pants are both high, which makes the elastic waistband surface uneven and wrinkled, and the problem of insufficient flexibility is more obvious. At the same time, the two ends of the absorbent body of the pull-up pants are respectively tightly arranged on the front and rear areas. When the elastic bands in the front and rear areas are subjected to external force or natural stretching, the stress will be concentrated on the two ends of the absorbent body, resulting in wrinkles at the two ends of the absorbent body, thereby reducing the flatness of the pull-up pants. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes a pair of soft elastic waist pull-up pants to solve the above technical problems and meet practical needs. The specific technical solution is as follows:

[0006] A pair of flexible elastic waist pull-up pants, comprising an absorbent body and an elastic waist, wherein the elastic waist comprises a connecting portion and waist portions symmetrically arranged at both ends of the connecting portion in the length direction, wherein the waist portions at both ends of the elastic waist are folded inward from the outside and then arranged at both ends of the absorbent body in the length direction to form the folded portions of the elastic waist, wherein a double-sided tunnel-type bubble structure is arranged in the folded portion;

[0007] The elastic waistband is composed of an inner lining nonwoven fabric, an outer lining nonwoven fabric and elastic spandex yarns, the outer lining nonwoven fabric and the inner lining nonwoven fabric sequentially cover the absorbent body from the outside to the inside, the elastic spandex yarns are arranged between the inner lining nonwoven fabric and the outer lining nonwoven fabric of the waistband, and are symmetrically arranged with various distribution amounts and distribution spacings along the length direction of the absorbent body;

[0008] The double-sided tunnel-type bubble structure is composed of a plurality of sub-elastic cavities sandwiched between the inner lining non-woven fabric and the outer lining non-woven fabric of the folded portion.

[0009] Furthermore, an elastic cavity is provided between the inner lining non-woven fabric and the outer lining non-woven fabric of the folded portion, and a plurality of fourth spandex yarns are provided inside the elastic cavity. The fourth spandex yarns divide the elastic cavity into a plurality of sub-elastic cavities to form a double-sided tunnel-type bubble structure.

[0010] Furthermore, the waistline portion is sequentially provided with a first area, a second area, and a third area from top to bottom, a rectangular fourth area is provided in the second and third areas along the width direction, first spandex yarns are provided in the first area and arranged in parallel transversely, a plurality of second spandex yarns are provided in the second area and arranged in parallel transversely, a plurality of third spandex yarns are provided in the third area and arranged in parallel transversely, the second spandex yarns and the third spandex yarns correspond to a fourth area that transversely passes through the second and third areas respectively, and the second spandex yarns and the third spandex yarns in the fourth area are arranged in dots.

[0011] Furthermore, the distribution amount of the first spandex yarn in the first region is the same as the distribution amount and distribution spacing of the third spandex yarn in the third region, and the distribution amount and distribution spacing of the third spandex yarn in the third region are smaller than the distribution amount and distribution spacing of the second spandex yarn in the second region.

[0012] Furthermore, the distribution spacing of the fourth spandex yarn in the inner lining non-woven fabric and the outer lining non-woven fabric of the folded part is greater than the distribution spacing of the second spandex yarn in the second area, and the distribution amount of the fourth spandex yarn in the inner lining non-woven fabric and the outer lining non-woven fabric of the folded part is less than the distribution amount of the second spandex yarn in the second area.

[0013] Furthermore, the total number of the first spandex yarn, the second spandex yarn, the third spandex yarn and the fourth spandex yarn arranged in the waistline portion on one side is 25-50 yarns, the fineness of the first spandex yarn, the second spandex yarn, the third spandex yarn and the fourth spandex yarn is 35-350 dtex, the elasticity is controlled to 1.9-3.0 times, and the spacing is set to 3.00-4.50 mm.

[0014] Furthermore, the inner lining non-woven fabric is selected from a silky soft water-repellent non-woven fabric, and the outer lining non-woven fabric is selected from any one of a spunbond non-woven fabric or a hot air non-woven fabric.

[0015] The beneficial effects of the utility model are:

[0016] The utility model arranges fine-denier spandex yarns of various distribution amounts and distribution intervals in the first area, the second area and the third area of ​​the waistline, thereby improving the fit of the pull-up pants and preventing the elastic waistline of the trouser leg from turning inside out after being used for a period of time. By selecting fabrics with good flexibility to make inner and outer lining non-woven fabrics of the elastic waistline, and then combining them with fine-denier spandex yarns, the flexibility of the elastic waistline is increased and the problem of insufficient surface flatness of the elastic waistline is improved. By processing the fine-denier spandex yarns in the fourth area, the wrinkle phenomenon caused by the elastic waistline at the two ends of the absorption body when it is subjected to external force or natural stretching is reduced. The double-sided tunnel bubble structure at the two ends of the absorption body can reduce the pressure of the elastic waist of the pull-up pants on the baby's waist, thereby increasing the comfort of the baby when wearing it. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the pull-up pants in the thickness direction of the utility model.

[0018] Figure 2 This is a front unfolded structural schematic diagram of the pull-up pants of the present invention.

[0019] Figure 3 For along Figure 2 A partial enlarged view of the AA area in the middle.

[0020] Figure numerals: absorption body 1, surface layer 11, guide layer 12, core 13, covering layer 14, PE film layer 15, bottom film non-woven fabric layer 16, elastic waist 2, lining non-woven fabric 21, outer lining non-woven fabric 22, elastic spandex yarn 23, first spandex yarn 231, second spandex yarn 232, third spandex yarn 233, first area 24, second area 25, third area 26, folding part 27, fourth area 28, connecting part 29, waist circumference 20, double-sided tunnel bubble structure 3, fourth spandex yarn 31, elastic cavity 32, sub-elastic cavity 33, adhesive colloid 4. DETAILED DESCRIPTION

[0021] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0022] like Figures 1 to 3 As shown, the utility model provides a technical solution: a pair of soft elastic waist pull-up pants, comprising an absorbent body 1 and an elastic waist 2, wherein the elastic waist 2 comprises a connecting portion 29 and waist portions 20 symmetrically arranged at both ends of the connecting portion 29 in the length direction, the waist portions 20 at both ends of the elastic waist 2 are respectively folded from the outside to the inside and placed at both ends of the absorbent body 1 in the length direction to form a folded portion 27 of the elastic waist 2, and a double-sided tunnel-type bubble structure 3 is arranged in the folded portion 27.

[0023] The elastic waist 2 is composed of an inner lining non-woven fabric 21, an outer lining non-woven fabric 22 and elastic spandex yarns 23. The outer lining non-woven fabric 22 and the inner lining non-woven fabric 21 sequentially cover the absorbent body 1 from the outside to the inside. The elastic spandex yarns 23 are arranged between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the waist circumference 20, and are symmetrically arranged with various distribution amounts and distribution spacings along the length direction of the absorbent body 1.

[0024] The double-sided tunnel-type bubble structure 3 is composed of a plurality of sub-elastic cavities 33 sandwiched between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the folded portion 27 .

[0025] The elastic spandex yarns 23 of the elastic waist 2 are concentratedly distributed between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the waist 20. The elastic spandex yarns 23 are not arranged in the connecting portion 29. The elastic spandex yarns 23 are compound-bonded with the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 by hot melt adhesive, thereby forming the elastic waist 2. When the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the waist 20 are folded inward to form the folding portion 27, the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the waist 20 are folded inward to form the folding portion 27. The ends of the absorbent body 1 are flush longitudinally, the outer lining nonwoven fabric 22 covers the surface of the absorbent body 1 away from the inner lining nonwoven fabric 21, and the folded portions 27 at both ends of the waistline portion 20 are bonded to the corresponding ends of the absorbent body 1 through the adhesive colloid 4, one end of the adhesive colloid 4 is between the inner lining nonwoven fabric 21 and the outer lining nonwoven fabric 22, and the other end is in the overlapping part of the outer lining nonwoven fabric 22 and the absorbent body 1, so that the folded portions 27 can be fixed at the ends of the absorbent body 1 at both ends.

[0026] The absorbent body 1 includes a surface layer 11, a guide layer 12, a core body 13, a coating layer 14, a PE film layer 15 and a bottom film non-woven fabric layer 16 which are arranged in sequence from the inside to the outside. The surface layer 11 and the guide layer 12 are made of non-woven fabric material, the core body 13 is a mixture of fluff pulp and a high molecular water-absorbent resin, the coating layer 14 is made of non-woven fabric or dust-free paper, and the surface layer 11, the guide layer 12, the core body 13, the coating layer 14, the PE film layer 15 and the bottom film non-woven fabric layer 16 are bonded in sequence by hot-melt adhesive to form the absorbent body 1.

[0027] The utility model arranges elastic spandex yarns 23 with various distribution amounts and distribution intervals at the waist circumference 20, thereby improving the fit of the pull-up pants to the baby's waist and abdomen, preventing the pull-up pants from falling off during wearing, and preventing the elastic waist 2 at the trouser opening from everting after being used for a period of time. The double-sided tunnel bubble structure 3 at both ends of the absorption body 1 can reduce the pressure of the waist circumference 20 of the elastic waist 2 of the pull-up pants on the baby's waist and abdomen, thereby increasing the comfort of the baby when wearing.

[0028] As another preferred embodiment of the present invention, Figure 1 As shown, an elastic cavity 32 is provided between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the folded portion 27, and a plurality of fourth spandex yarns 31 are provided inside the elastic cavity 32. The fourth spandex yarns 31 divide the elastic cavity 32 into a plurality of sub-elastic cavities 33 to form a double-sided tunnel-type bubble structure 3.

[0029] The double-sided tunnel-type bubble structure 3 is formed by relying on the structure of the absorbent body 1 and the elastic waist 2, so the double-sided tunnel-type bubble structure 3 has a certain structural strength as a whole, which can increase the durability of the double-sided tunnel-type bubble structure 3. The fourth spandex yarn 31 has a partitioning and supporting function in the elastic cavity 32. The fourth spandex yarn 31 forms a support between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the folded portion 27, thereby forming an elastic cavity 32. At the same time, a plurality of fourth spandex yarns 31 in the elastic cavity 32 divide the elastic cavity 32 into a plurality of sub-elastic cavities 33. The sub-elastic cavity 33 is in the shape of a long strip, and the sub-elastic cavities 33 are arranged in parallel in the folding portion 27 along the width direction of the paper absorbent body 1. The double-sided tunnel-type bubble structure 3 is used to reduce the pressure of the waist circumference portion 20 of the elastic waist circumference 2 on the baby's waist and abdomen, thereby increasing the comfort of the baby when wearing it. At the same time, the fourth spandex yarn 31 in the double-sided tunnel-type bubble structure 3 is distributed at the top position of the folding portion 27. The elasticity of the fourth spandex yarn 31 can provide a certain contraction force, thereby bringing the auxiliary waist circumference portion 20 close to the baby's waist and abdomen to a certain extent, preventing the pull-up pants from falling off when the baby is active.

[0030] As another preferred embodiment of the present invention, Figures 1 to 3 As shown, the waistline portion 20 is provided with a first area 24, a second area 25, and a third area 26 from top to bottom, a rectangular fourth area 28 is provided in the second area 25 and the third area 26 along the width direction, the first area 24 is provided with first spandex yarns 231 arranged in transverse parallel, the second area 25 is provided with a plurality of second spandex yarns 232 arranged in transverse parallel, the third area 26 is provided with a plurality of third spandex yarns 233 arranged in transverse parallel, the second spandex yarns 232 and the third spandex yarns 233 correspond to and pass through the fourth area 28 in the second area 25 and the third area 26 respectively, and the second spandex yarns 232 and the third spandex yarns 233 in the fourth area 28 are arranged in dots.

[0031] The first spandex yarn 231 is arranged between the inner lining non-woven fabric 21 on the inner side of the folded portion 27 of the first area 24, the second spandex yarn 232 is arranged between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 corresponding to the second area 25, and the third spandex yarn 233 is arranged between the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 corresponding to the third area 26.

[0032] The two ends of the absorbent body 1 are respectively placed in the fourth area 28 corresponding to the waistline 20. The second spandex yarn 232 and the third spandex yarn 233 in the fourth area 28 are arranged to control the elastic distribution in the fourth area 28 by changing the continuity of the second spandex yarn 232 and the third spandex yarn 233. The design can make the second spandex yarn 232 and the third spandex yarn 233 stretch and retract more evenly when subjected to force, preventing the absorbent body 1 from wrinkling due to uneven elasticity, thereby increasing the flatness of the pull-up pants to bring users a better experience.

[0033] When making the elastic waistband 2, first lay the outer lining non-woven fabric 22 on the platform, and then lay the corresponding first spandex yarn 231, second spandex yarn 232, third spandex yarn 233 and fourth spandex yarn 31 in the corresponding areas at both ends of the length direction of the outer lining non-woven fabric 22 according to the preset intervals, and limit and press the two ends of the laid first spandex yarn 231, second spandex yarn 232, third spandex yarn 233 and fourth spandex yarn 31, and use a pressing plate or a wide-mouth clamp to fix them to prevent the first spandex yarn 231, second spandex yarn 232, third spandex yarn 233 and fourth spandex yarn 31 from shifting during subsequent operations, and use a glue gun to apply hot melt adhesive to the first spandex yarn 231, second spandex yarn 232, third spandex yarn 233 and fourth spandex yarn 31, and heat The molten glue is fixedly applied to two adjacent elastic bands, and then a breaking device is used to break the second spandex yarn 232 and the third spandex yarn 233 in the fourth spandex yarn 31. The tool on the cutting roller of the breaking device cuts the second spandex yarn 232 and the third spandex yarn 233 in the fourth spandex yarn 31 according to a preset breaking distance, so that the second spandex yarn 232 and the third spandex yarn 233 in the fourth spandex yarn 31 are cut into several small segments. After the breaking is completed, the lining non-woven fabric 21 is correspondingly covered on the surface of the first spandex yarn 231, the second spandex yarn 232, the third spandex yarn 233 and the fourth spandex yarn 31. The edge parts of the lining non-woven fabric 21 and the outer lining non-woven fabric 22 are ultrasonically welded and the edges are interconnected to complete the production of the elastic waist 2.

[0034] The prepared elastic waistband 2 can be bonded to the absorbent body 1. The specific process is: the elastic waistband 2 is arranged at a certain distance on the conveyor belt, with one side of the inner lining non-woven fabric 21 of the elastic waistband 2 facing upward and one side of the outer lining non-woven fabric 22 facing downward. Then, during the forward conveying process, hot melt adhesive is applied to the surface of the inner lining non-woven fabric 21 by a glue gun, and then bonded to the absorbent body 1 on another conveyor line. The bottom film non-woven fabric layer 16 of the absorbent body 1 is attached to the surface of the inner lining non-woven fabric 21, and the bonding of the bottom film non-woven fabric layer 16 of the absorbent body 1 and the surface of the inner lining non-woven fabric 21 can be completed, thereby bonding the elastic waistband 2 to the absorbent body 1.

[0035] As another preferred embodiment of the present invention, Figures 1 to 3 As shown, the distribution amount of the first spandex yarn 231 in the first area 24 is the same as the distribution amount and distribution spacing of the third spandex yarn 233 in the third area 26, and the distribution amount and distribution spacing of the third spandex yarn 233 in the third area 26 are smaller than the distribution amount and distribution spacing of the second spandex yarn 232 in the second area 25.

[0036] The distribution spacing of the fourth spandex yarn 31 in the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the folding part 27 is greater than the distribution spacing of the second spandex yarn 232 in the second area 25, and the distribution amount of the fourth spandex yarn 31 in the inner lining non-woven fabric 21 and the outer lining non-woven fabric 22 of the folding part 27 is less than the distribution amount of the second spandex yarn 232 in the second area 25.

[0037] Taking into account the characteristics of waist force distribution when infants and young children wear pull-up pants, as well as changes in the shape of the baby's belly, the elastic spandex yarns 23 and the spacing in the first area 24, the second area 25, and the third area 26 of the waist 20 need to be adjusted in a targeted manner. Considering that the upper part of the waist is subjected to the greatest force when infants and young children wear pull-up pants, the first spandex yarn 231 in the first area 24 helps to better fix and support the upper part of the waist and reduce the occurrence of eversion. At the same time, the inward-retracted design of the upper part can also better fit the baby's body curve and improve the comfort and stability of wearing. Secondly, the second spandex yarn 232 in the second area 25 can increase the breathability and comfort of wearing while ensuring the supporting force, and avoid the discomfort caused by being too tight or too loose. The tightening design of the third spandex yarn 233 in the third area 26 can effectively prevent urine or other liquids from seeping out from the lower part of the waist, thereby improving the leak-proof performance of the pull-up pants.

[0038] The fourth spandex yarn 31 functions to divide the elastic cavity 32 into a plurality of sub-elastic cavities 33. Meanwhile, the elasticity of the fourth spandex yarn 31 can provide a certain contraction force, thereby making the auxiliary waistline portion 20 close to the waist and abdomen of the baby to a certain extent.

[0039] As another preferred embodiment of the utility model, the total number of the first spandex yarn 231, the second spandex yarn 232, the third spandex yarn 233 and the fourth spandex yarn 31 arranged in the waistline portion 20 on one side is 25-50, and the fineness of the first spandex yarn 231, the second spandex yarn 232, the third spandex yarn 233 and the fourth spandex yarn 31 is 35-350dtex, the elasticity is controlled to 1.9-3.0 times, and the spacing is set to 3.00-4.50mm.

[0040] As another preferred embodiment of the present invention, the inner lining nonwoven fabric 21 is made of a silky soft water-repellent nonwoven fabric, and the outer lining nonwoven fabric 22 is selected from any one of a spunbond nonwoven fabric and a hot air nonwoven fabric.

[0041] The first spandex yarn 231, the second spandex yarn 232, the third spandex yarn 233 and the fourth spandex yarn 31 of the elastic spandex yarn 23 are all fine denier spandex yarns with good resilience. The silky soft and water-repellent non-woven fabric lining 21 provides excellent comfort and softness. The silky soft and water-repellent non-woven fabric lining 21 can be selected with a gram weight of 10gsm-15gsm. The spunbond non-woven fabric or hot air non-woven fabric of the outer lining non-woven fabric 22 has excellent air permeability and softness, which helps to keep the outside of the waist dry and comfortable. The soft lining non-woven fabric 21 and the outer lining non-woven fabric 22 are hot-melt bonded to the elastic spandex yarn 23. The resulting elastic waist circumference 2 has high softness, reduces the uneven surface of the waist circumference 20 and the obvious wrinkles, thereby improving the softness and breathability of the product and optimizing the overall touch of the product.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pair of pull-on pants with a flexible elastic waist, comprising an absorbent body (1) and an elastic waist (2), characterized in that: The elastic waist (2) comprises a connecting portion (29) and waist portions (20) symmetrically arranged at both ends of the connecting portion (29) in the length direction, the waist portions (20) at both ends of the elastic waist (2) are respectively folded from the outside to the inside and then placed at both ends of the absorbent body (1) in the length direction to form folded portions (27) of the elastic waist (2), and a double-sided tunnel-type bubble structure (3) is arranged in the folded portion (27); The elastic waistband (2) is composed of an inner lining non-woven fabric (21), an outer lining non-woven fabric (22) and elastic spandex yarns (23), the outer lining non-woven fabric (22) and the inner lining non-woven fabric (21) sequentially covering the absorbent body (1) from the outside to the inside, the elastic spandex yarns (23) are arranged between the inner lining non-woven fabric (21) and the outer lining non-woven fabric (22) of the waistband portion (20), and are symmetrically arranged in various distribution amounts and distribution spacings along the length direction of the absorbent body (1); The double-sided tunnel-type bubble structure (3) is composed of a plurality of sub-elastic cavities (33) sandwiched between an inner lining non-woven fabric (21) and an outer lining non-woven fabric (22) of the folded portion (27).

2. The flexible elastic waist pull-up pants according to claim 1, characterized in that: An elastic cavity (32) is provided between the inner lining non-woven fabric (21) and the outer lining non-woven fabric (22) of the folded portion (27), a plurality of fourth spandex yarns (31) are provided inside the elastic cavity (32), and the fourth spandex yarns (31) divide the elastic cavity (32) into a plurality of sub-elastic cavities (33) to form a double-sided tunnel-type bubble structure (3).

3. The flexible elastic waist pull-up pants according to claim 2, characterized in that: The waistline portion (20) is provided with a first area (24), a second area (25), and a third area (26) in order from top to bottom; a rectangular fourth area (28) is provided in the second area (25) and the third area (26) along the width direction; the first area (24) is provided with first spandex yarns (231) arranged in parallel in the transverse direction; the second area (25) is provided with a plurality of second spandex yarns (232) arranged in parallel in the transverse direction; the third area (26) is provided with a plurality of third spandex yarns (233) arranged in parallel in the transverse direction; the second spandex yarns (232) and the third spandex yarns (233) respectively and correspondingly pass through the fourth area (28) in the second area (25) and the third area (26); the second spandex yarns (232) and the third spandex yarns (233) in the fourth area (28) are arranged in dots.

4. The flexible elastic waist pull-up pants according to claim 3, characterized in that: The distribution amount of the first spandex yarn (231) in the first area (24) is the same as the distribution amount and distribution spacing of the third spandex yarn (233) in the third area (26); the distribution amount and distribution spacing of the third spandex yarn (233) in the third area (26) are smaller than the distribution amount and distribution spacing of the second spandex yarn (232) in the second area (25).

5. The flexible elastic waist pull-up pants according to claim 4, characterized in that: The distribution spacing of the fourth spandex yarn (31) in the inner lining non-woven fabric (21) and the outer lining non-woven fabric (22) of the folded portion (27) is greater than the distribution spacing of the second spandex yarn (232) in the second area (25), and the distribution amount of the fourth spandex yarn (31) in the inner lining non-woven fabric (21) and the outer lining non-woven fabric (22) of the folded portion (27) is less than the distribution amount of the second spandex yarn (232) in the second area (25).

6. The flexible elastic waist pull-up pants according to claim 5, characterized in that: The total number of the first spandex yarn (231), the second spandex yarn (232), the third spandex yarn (233) and the fourth spandex yarn (31) arranged in the waistline portion (20) on one side is 25-50, the fineness of the first spandex yarn (231), the second spandex yarn (232), the third spandex yarn (233) and the fourth spandex yarn (31) is 35-350 dtex, the elasticity is controlled to be 1.9-3.0 times, and the spacing is set to be 3.00-4.50 mm.

7. The flexible elastic waist pull-up pants according to claim 1, characterized in that: The inner lining non-woven fabric (21) is selected from a silky soft water-repellent non-woven fabric, and the outer lining non-woven fabric (22) is selected from any one of a spunbond non-woven fabric and a hot air non-woven fabric.

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