An elastic waistband diaper and its manufacturing process

Abstract

This invention discloses an elastic waistband diaper and its manufacturing process, comprising a diaper body and an elastic waistband connected to the end of the diaper body. The elastic waistband includes a front waistband connected to the front end of the diaper body and a back waistband connected to the rear end of the diaper body. The front waistband contains a first set of elastic bands arranged in a crisscross pattern, and the back waistband contains a second set of elastic bands arranged in a crisscross pattern. The stretch length of the front waistband area is less than the stretch length of the back waistband area, forming a wearing structure that is narrower in the front and wider in the back. When worn, the back waistband can better cover the buttocks and back waist area, resulting in a better wearing effect and greater comfort.

Description

Technical Field

[0001] This invention relates to the field of absorbent materials technology, specifically to an elastic waistband diaper and its manufacturing process. Background Art

[0002] Pants-style diapers are a type of diaper with a circular waistband. They do not have waistbands and only rely on the circular waistband to keep the baby's waist tight, resembling regular underwear. Due to their convenience, more and more consumers are using them as regular diapers. Because of their elastic waistband, they are less likely to shift when worn by babies compared to traditional Velcro diapers.

[0003] Patent application CN202221945672.6 discloses an elastic fabric waistband-type diaper with breathable windows. The breathable area of ​​the elastic waistband in this application is made of a single layer of non-woven fabric, providing good breathability and improving user comfort. The first elastic area of ​​the elastic waistband is wrapped with multiple layers of non-woven fabric, and the second elastic area is wrapped with multiple layers of non-woven fabric, forming elastic stretching areas for easy wear. However, during use, the buttocks correspond to the back waist and the diaper's back waistband, and the lower abdomen corresponds to the front waistband. If the front and back waistbands are the same length, the back waistband will be tighter and the front waistband looser. Therefore, the width of the back waistband in the length direction should be greater than the width of the front waistband in the length direction to better cover the buttocks and lower back, increasing comfort. Summary of the Invention

[0004] To address the technical deficiencies in the background art, this invention proposes an elastic waistband diaper and its manufacturing process, solving the aforementioned technical problems and meeting practical needs. The specific technical solution is as follows:

[0005] An elastic waistband diaper includes a diaper body and an elastic waistband connected to the end of the diaper body. The elastic waistband includes a front waistband connected to the front end of the diaper body and a back waistband connected to the rear end of the diaper body. The front waistband has a first set of elastic bands arranged in a cross configuration, and the back waistband has a second set of elastic bands arranged in a cross configuration. The length between the two farthest ends of the front waistband extending along the length direction of the elastic waistband is smaller than the length between the two farthest ends of the back waistband extending along the length direction of the elastic waistband. The two ends of the back waistband in the length direction are folded towards the front waistband in a pincer shape and ultrasonically welded to the two ends of the front waistband in the length direction. The outer end face of the front waistband has a hollow interlayer.

[0006] As an improvement to the above solution, the front waistband includes a nonwoven fabric layer one and a nonwoven fabric layer two that are composited. An elastic elastic band group one composed of several elastic elastic bands is sandwiched between the nonwoven fabric layer one and the nonwoven fabric layer two. The elastic elastic band group one is sandwiched between the nonwoven fabric layer one and the nonwoven fabric layer two and pressed together by a composite roller.

[0007] As an improvement to the above solution, the back waistband includes a nonwoven fabric layer three and a nonwoven fabric layer four that are composited on the upper and lower sides. An elastic elastic band group two composed of several elastic elastic bands is sandwiched between the nonwoven fabric layer three and the nonwoven fabric layer four. The elastic elastic band group two is sandwiched between the nonwoven fabric layer three and the nonwoven fabric layer four and pressed together by a composite roller.

[0008] As an improvement to the above solution, the elastic elastic band in the elastic band group one includes an elastic elastic band one arranged along the length direction of the front waist circumference and an elastic elastic band two arranged along the width direction of the front waist circumference. The elastic elastic band one has an elastic elongation ratio of 3.0-4.5 times, and the elastic elastic band two has an elastic elongation ratio of 2.5 times.

[0009] As an improvement to the above solution, the elastic elastic band in the second elastic band group includes an elastic elastic band three arranged along the length direction of the back waist circumference and an elastic elastic band four arranged along the width direction of the back waist circumference. The elastic elastic band three has an elastic ratio of 1.5-2.5 times, and the elastic elastic band four has an elastic ratio of 2.0 times.

[0010] As an improvement to the above solution, the cavity interlayer is integrally folded into shape by the front waistband. The upper edge of the front waistband is folded towards the side away from the human body, and after extending to the bottom height of the front waistband, it is folded a second time towards the upper edge of the front waistband, and extends to be flush with the upper edge of the front waistband. The edges of the two sides and the bottom of the cavity interlayer are fixed to the front waistband by ultrasonic welding. The cavity interlayer has an opening near the upper edge of the front waistband.

[0011] As an improvement to the above solution, in the above solution, the cavity interlayer includes a first interlayer on the side closer to the human body surface and a second interlayer on the side away from the human body. The first interlayer, the second interlayer and the front waistband are an integral structure. An elastic band 5 is provided between the second interlayer and the front waistband. The positions of the elastic band 5 and the elastic band in the front waistband are staggered.

[0012] A manufacturing process for an elastic waistband diaper includes:

[0013] Step 1: Unwinding and conveying the bottom non-woven fabric; the bottom non-woven fabric is in the length direction along the conveying direction and the width direction perpendicular to the conveying direction. Several individual diapers are arranged along the length direction of the bottom non-woven fabric. A front waist area, an absorbent area, and a back waist area are arranged along the width direction of the bottom non-woven fabric and aligned with the positions of the individual diapers.

[0014] Step 2: Lay the elastic bands; Lay the elastic bands on the front waistband and back waistband areas of the bottom non-woven fabric;

[0015] Step 3: Unwinding and conveying the surface non-woven fabric and applying adhesive; an adhesive surface is provided on the end face of the surface non-woven fabric facing the bottom non-woven fabric. The adhesive surface is aligned with the front waist area and then applied as adhesive strips by the adhesive scraper. The adhesive surface is aligned with the back waist area and then applied as adhesive surface by the adhesive scraper.

[0016] Step 4: Composite bonding using a composite roller; the bottom nonwoven fabric and the top nonwoven fabric are bonded together using a composite roller to obtain a composite nonwoven fabric layer;

[0017] Step 5: Cut off the leg circumference and cut into individual products; cut into individual diaper pieces on the composite non-woven fabric layer using a cutting roller, and cut arc-shaped leg openings on both sides of each individual diaper.

[0018] Step Six: Fold in one step; Fold the front waist area of ​​the diaper along the central axis of the openings on both sides of the legs toward the back waist area;

[0019] Step 7: Secondary folding and welding; Fold the two ends of the rear waist area in a clamp shape towards the front waist area and weld them together at the two ends of the front waist area in the length direction using ultrasonic welding.

[0020] Step 8: Three-fold welding; Align the front waistband with the upper edge of the back waistband, that is, fold the lower one-third of the front waistband outward and weld it to the front waistband using ultrasonic welding.

[0021] Step 9: Four-fold welding; the lower half of the front waistband area is folded towards the upper edge of the front waistband area after folding, and a cavity sandwich is formed on the front waistband area by ultrasonic welding.

[0022] As an improvement to the above solution, in step two, elastic elastic band one is arranged at equal intervals along the length direction of the front waist area, elastic elastic band two is arranged at equal intervals along the width direction of the front waist area, elastic elastic band three is arranged at equal intervals along the length direction of the back waist area, and elastic elastic band four is arranged at equal intervals along the width direction of the back waist area.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. The elastic ratio of the front waistband is higher than that of the back waistband, so that both the front and back waistbands of the individual diapers will shrink back under the elastic force of the elastic bands after being cut into individual pieces. The shrinkage size of the front waistband will be greater than that of the back waistband. When the sides of the diaper waistband are manually pulled, under the same force applied to both sides of the diaper, the stretching length of the front waistband is less than that of the back waistband, forming a wearing structure that is narrower in the front and wider in the back. When wearing, the back waistband can better cover the buttocks and back waist area, resulting in a better wearing effect and greater comfort.

[0025] 2. The cavity interlayer is integrally formed by folding the front waistband. The integrally formed cavity interlayer has an opening, which can be used to place items such as hand warmers. Compared with the traditional method of welding or gluing an additional storage pocket to the front waistband, the integrally formed cavity interlayer has fewer and simpler processes. Moreover, the elasticity of the cavity interlayer and the front waistband is consistent and will not affect the elasticity of the front waistband. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the positional structure of the first elastic band assembly and the second elastic band assembly of the present invention in a flat state.

[0027] Figure 2 This is a schematic diagram of the front and rear waistband thickness direction structure of the present invention.

[0028] Figure 3 This is a schematic diagram of the overall external structure of the present invention.

[0029] Figure 4 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0030] Figure 5 for Figure 2 Enlarged schematic diagram of part B in the middle section.

[0031] Figure 6 This is a schematic diagram illustrating the manufacturing process of an elastic waistband diaper according to the present invention.

[0032] The components include: diaper body 1, elastic waistband 2, front waistband 3, non-woven fabric layer 1 301, non-woven fabric layer 2 302, adhesive strip 303, back waistband 4, non-woven fabric layer 3 401, non-woven fabric layer 4 402, adhesive surface 403, elastic elastic band group 1 5, elastic elastic band 1 501, elastic elastic band 2 502, elastic elastic band group 2 6, elastic elastic band 3 601, elastic elastic band 4 602, hollow interlayer 7, first interlayer 701, second interlayer 702, opening 703, and elastic elastic band 5 8. Detailed Implementation

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings and related examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0034] like Figures 1 to 5 As shown, an elastic waistband diaper includes a diaper body 1 and an elastic waistband 2 connected to the end of the diaper body 1. The elastic waistband 2 includes a front waistband 3 connected to the front end of the diaper body 1 and a back waistband 4 connected to the rear end of the diaper body 1. The front waistband 3 has a first set of elastic bands 5 arranged in a cross pattern, and the back waistband 4 has a second set of elastic bands 6 arranged in a cross pattern. The length between the two farthest ends of the front waistband 3 extending along the length direction of the elastic waistband 2 is smaller than the length between the two farthest ends of the back waistband 4 extending along the length direction of the elastic waistband 2. The two ends of the back waistband 4 in the length direction are folded towards the front waistband 3 in a pincer shape and ultrasonically welded to the two ends of the front waistband 3 in the length direction. The outer end face of the front waistband 3 has a hollow interlayer 7.

[0035] like Figure 4 As shown, further, in the above scheme, the front waistband 3 includes an upper and lower composite nonwoven fabric layer 301 and a lower nonwoven fabric layer 302. An elastic elastic band group 5 composed of several elastic elastic bands is sandwiched between the nonwoven fabric layer 301 and the nonwoven fabric layer 302. The elastic elastic band group 5 is sandwiched between the nonwoven fabric layer 301 and the nonwoven fabric layer 302 and pressed tightly by a composite roller, so that the front waistband 3 has a certain elasticity in both the length and width directions.

[0036] like Figure 5 As shown, further, in the above scheme, the back waistband 4 includes an upper and lower composite nonwoven fabric layer three 401 and a nonwoven fabric layer four 402. An elastic elastic band group two 6 composed of several elastic elastic bands is sandwiched between the nonwoven fabric layer three 401 and the nonwoven fabric layer four 402. The elastic elastic band group two 6 is sandwiched between the nonwoven fabric layer three 401 and the nonwoven fabric layer four 402 and pressed tightly by a composite roller, so that the back waistband 4 has a certain elasticity in both the length and width directions.

[0037] like Figure 1 As shown, further, in the above scheme, the elastic elastic bands in the elastic elastic band group 5 include elastic elastic band 501 arranged along the length direction of the front waist circumference 3 and elastic elastic band 502 arranged along the width direction of the front waist circumference 3. The elastic elastic band 501 has an elastic elongation ratio of 3.0-4.5 times, and the elastic elastic band 502 has an elastic elongation ratio of 2.5 times.

[0038] like Figure 1 As shown, further, in the above scheme, the elastic elastic bands in the elastic elastic band group 2 6 include elastic elastic band 3 601 arranged along the length direction of the back waist circumference 4 and elastic elastic band 4 602 arranged along the width direction of the back waist circumference 4. The elastic elastic band 3 601 has an elastic elongation ratio of 1.5-2.5 times, and the elastic elastic band 4 602 has an elastic elongation ratio of 2.0 times.

[0039] It should be noted that the elastic stretch ratio of the elastic band 501 determines the stretch size of the elastic band group 5, that is, the stretch size of the front waist circumference 3. The elastic stretch ratio of the elastic band 601 determines the stretch size of the elastic band group 6, that is, the stretch size of the back waist circumference 4. The elastic stretch ratio of the elastic band 501 is 3.0-4.5 times, and the elastic stretch ratio of the elastic band 601 is 1.5-2.5 times. Therefore, the length of the front waist circumference 3 is smaller than the length of the back waist circumference 4. In use, by manually pulling the sides of the diaper waist, under the same force applied to both sides of the diaper, the stretch length of the front waist circumference 3 is smaller than the stretch length of the back waist circumference 4, forming a wearing structure that is narrower in the front and wider in the back.

[0040] It should be noted that the elongation ratio of the elastic band in the first elastic band group 5 is higher than that of the elastic band in the second elastic band group 6, and the shrinkage rate of the elastic band in the first elastic band group 5 is higher than that of the elastic band in the second elastic band group 6. Therefore, the length between the two farthest ends of the front waistband 3 in the length direction is smaller than the length between the two farthest ends of the back waistband 4 in the length direction. During manufacturing, the elastic force of the elastic band causes the front waistband 3 to shrink naturally, exposing the two ends of the back waistband 4 in the length direction, which facilitates the subsequent clamping and welding of the two ends of the back waistband 4 in the length direction to the two ends of the front waistband 3.

[0041] like Figure 2 As shown, further, in the above scheme, the cavity interlayer 7 is integrally folded into shape by the front waistband 3. The upper edge of the front waistband 3 is folded towards the side away from the human body, and after extending to the bottom height of the front waistband 3, it is folded a second time towards the upper edge of the front waistband 3, and extends to be flush with the upper edge of the front waistband 3.

[0042] like Figure 2 and Figure 4As shown, it should be noted that the integrally molded cavity interlayer 7 has an opening 703, which can be used to place items such as hand warmers. The thickness direction structure of the cavity interlayer 7 is consistent with the thickness direction structure of the front waistband 3, and it has the same elastic elastic band as the front waistband 3. This gives the cavity interlayer 7 the same elasticity and stretching performance as the front waistband 3. Compared with the traditional method of welding or gluing an additional storage pocket to the front waistband 3, the integrally molded cavity interlayer 7 has fewer and simpler processes, and the elasticity performance of the cavity interlayer 7 and the front waistband 3 is consistent, so it will not affect the elasticity performance of the front waistband 3.

[0043] like Figure 4 As shown, further, in the above scheme, the edges of the two sides and the bottom of the cavity interlayer 7 are fixed to the front waistband 3 by ultrasonic welding, and the cavity interlayer 7 is provided with an opening 703 near the upper edge of the front waistband 3.

[0044] like Figure 2 and Figure 4 As shown, further, in the above scheme, the cavity interlayer 7 includes a first interlayer 701 on the side close to the human body surface and a second interlayer 702 on the side away from the human body. The first interlayer 701, the second interlayer 702 and the front waistband 3 are an integral structure. An elastic band 8 is provided between the second interlayer 702 and the front waistband 3. The elastic band 8 and the elastic band in the front waistband 3 are staggered.

[0045] like Figure 6 As shown, the manufacturing process of an elastic waistband diaper includes:

[0046] Step 1: Unwinding and conveying the bottom non-woven fabric layer; the bottom non-woven fabric layer has a length direction along the conveying direction and a width direction perpendicular to the conveying direction. Several individual diapers are arranged along the length direction of the bottom non-woven fabric layer. A front waist area, an absorbent area, and a back waist area are arranged along the width direction of the bottom non-woven fabric layer and aligned with the positions of the individual diapers.

[0047] It should be noted that the front waist area and the back waist area correspond to the positions of the front waist 3 and the back waist 4 on the individual diaper, respectively. The width of the front waist area is greater than that of the back waist area. Specifically, the width of the back waist area is equal to one-third of the width of the front waist area.

[0048] Step 2: Laying elastic bands; Laying elastic bands on the front waist area and back waist area on the bottom non-woven fabric layer, wherein elastic band 1 501 is laid at equal intervals along the length direction of the front waist area, elastic band 2 502 is laid at equal intervals along the width direction of the front waist area, elastic band 3 601 is laid at equal intervals along the length direction of the back waist area, and elastic band 4 602 is laid at equal intervals along the width direction of the back waist area.

[0049] It should be noted that in the first embodiment of the present invention: the elastic elastic band 501 arranged along the length direction of the front waist area has an elastic stretch ratio of 3.0-4.5 times, the elastic elastic band 502 has an elastic stretch ratio of 2.5 times, the elastic elastic band 601 arranged along the length direction of the rear waist area has an elastic stretch ratio of 1.5-2.5 times, and the elastic elastic band 602 arranged along the width direction of the rear waist area has an elastic stretch ratio of 2.0 times; The elastic band of the front waistband has a higher stretch ratio than that of the back waistband. This causes both the front and back waistbands of the individual diapers to shrink back under the elastic force of the elastic bands. The shrinkage rate of the front waistband is higher than that of the back waistband. When the sides of the diaper waist are manually pulled, under the same force applied to both sides of the diaper, the stretch length of the front waistband is less than that of the back waistband, forming a wearing structure that is narrower in the front and wider in the back.

[0050] It should be noted that in the second embodiment of the present invention: the elastic band 501 arranged along the length of the front waist area has a stretch ratio of 3.0 times, and the elastic band 601 arranged along the length of the back waist area has a stretch ratio of 2.5 times. This ensures that both the front and back waist areas of the diaper individual after being cut into pieces will shrink back under the elastic force of the elastic bands. When the stretch ratios of the elastic bands 501 and 601 are similar, the number of elastic bands 501 in the front waist area is greater than the number of elastic bands 601 in the back waist area. The shrinkage rate of the front waist area is higher than that of the back waist area. By manually pulling the sides of the diaper waist, under the same force applied to both sides of the diaper, the stretch length of the front waist area is less than that of the back waist area, forming a wearing structure that is narrow in the front and wide in the back.

[0051] It should be noted that, in the third embodiment of the present invention, the elastic band 501 arranged along the length of the front waistband has a stretch ratio of 3.0 times, and the elastic band 601 arranged along the length of the back waistband has a stretch ratio of 2.5 times. This ensures that both the front and back waistbands of the diaper individual after being cut into pieces will shrink back under the elastic force of the elastic bands. When the stretch ratios of the elastic bands 501 and 601 are similar, the diameter of the elastic band 501 in the front waistband is larger than the diameter of the elastic band 601 in the back waistband. Therefore, the shrinkage rate of the front waistband is higher than that of the back waistband. By manually pulling the sides of the diaper waistband, under the same force applied to both sides of the diaper, the stretch length of the front waistband is less than that of the back waistband, forming a wearing structure that is narrower in the front and wider in the back.

[0052] Step 3: Unwinding and conveying the surface non-woven fabric layer and applying adhesive; an adhesive surface is provided on the side of the surface non-woven fabric layer facing the bottom non-woven fabric layer. The adhesive surface is aligned with the front waist area and applied into several adhesive strips 303 by the adhesive scraper. The adhesive surface is aligned with the back waist area and applied into an adhesive surface 403 by the adhesive scraper.

[0053] It should be noted that the spacing between the elastic bands in the front waistband area is greater than the spacing between the elastic bands in the back waistband area. An adhesive strip 303 is applied to the bonding surface corresponding to the front waistband area using a glue scraper. The positions of the adhesive strip 303 and the elastic bands in the front waistband area are then bonded together, creating several cavities in the front waistband area while simultaneously fixing the bonding. When a heat pack is placed inside, these cavities ensure even heat distribution, preventing excessive heat transfer that could cause discomfort to the baby. Simultaneously, the cavities absorb the heat from the heat pack, providing a certain heat storage function, preventing the heat from dissipating quickly after the heat pack is removed.

[0054] It should be noted that the spacing between the elastic bands in the back waist area is smaller than that between the elastic bands in the front waist area. The adhesive surface 403 is applied to the bonding surface in the back waist area by the adhesive scraper, which bonds and fixes the top non-woven fabric layer and the bottom non-woven fabric layer. The bonding area is larger and tighter, and while having a certain elasticity, it is also more conducive to the user's lifting and gripping when wearing the garment, resulting in a more stable connection.

[0055] Step 4: Composite bonding using a composite roller; the bottom nonwoven fabric layer and the top nonwoven fabric layer are bonded together using a composite roller to obtain a composite nonwoven fabric layer;

[0056] Step 5: Cut off the leg circumference and cut into individual products; cut into individual diaper pieces on the composite non-woven fabric layer using a cutting roller, and cut arc-shaped leg openings 703 on both sides of the individual diaper pieces;

[0057] Step Six: Fold in one step; Fold the front waist area of ​​the diaper along the central axis of the two leg openings 703 toward the back waist area;

[0058] It should be noted that because the elastic ratio of the elastic band in the front waistband area is greater than that in the back waistband area, after cutting, the front waistband area and the back waistband area will shrink back under the action of the elastic band. The shrinkage dimension of the front waistband area in the length direction is higher than that of the back waistband area in the length direction. The two ends of the back waistband area in the length direction are longer than the front waistband area, which makes it convenient to fold and weld the two ends of the back waistband area in the length direction to the two ends of the front waistband area in the length direction in a clamp shape during the subsequent secondary folding.

[0059] Step 7: Secondary folding and welding; Fold the two ends of the rear waist area in a clamp shape towards the front waist area and weld them to the two ends of the front waist area in the length direction by ultrasonic welding.

[0060] Step 8: Three-fold welding; Align the front waistband with the upper edge of the rear waistband, that is, fold the lower one-third of the front waistband outward and weld it to the front waistband using ultrasonic welding.

[0061] Step 9: Four-fold welding; the lower half of the front waistband area is folded towards the upper edge of the front waistband area after folding, and a cavity sandwich 7 is formed on the front waistband area by ultrasonic welding.

[0062] It should be noted that, since the width of the rear waistband area is equal to one-third of the width of the front waistband area, the spacing between the elastic bands in the front waistband area is greater than the spacing between the elastic bands in the rear waistband area. Furthermore, when the front waistband area is folded three times and four times in steps eight and nine, the elastic bands arranged laterally along the front waistband area are folded alternately. This maintains the elasticity between the front waistband 3 and the hollow interlayer 7 while making the thickness distribution of the front waistband 3 and the hollow interlayer 7 more uniform, preventing the front waistband 3 from becoming too bulky.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An elastic waistband diaper, characterized in that, The diaper includes a main body (1) and an elastic waistband (2) connected to the end of the main body (1). The elastic waistband (2) includes a front waistband (3) connected to the front end of the main body (1) and a back waistband (4) connected to the rear end of the main body (1). The front waistband (3) is fitted with a first elastic band group (5) arranged in a cross pattern, and the back waistband (4) is fitted with a second elastic band group (6) arranged in a cross pattern. The length between the two farthest ends of the front waistband (3) extending along the length direction of the elastic waistband (2) is smaller than the length between the two farthest ends of the back waistband (4) extending along the length direction of the elastic waistband (2). The two ends of the back waistband (4) in the length direction are folded in a pincer shape towards the front waistband (3) and ultrasonically welded to the two ends of the front waistband (3) in the length direction. The outer end face of the front waistband (3) is provided with a cavity interlayer (7). The elastic elastic bands in the elastic band group one (5) include elastic elastic band one (501) arranged along the length direction of the front waist (3) and elastic elastic band two (502) arranged along the width direction of the front waist (3). The elastic elastic band one (501) has an elastic elongation ratio of 3.0-4.5 times, and the elastic elastic band two (502) has an elastic elongation ratio of 2.5 times. The elastic elastic bands in the second elastic band group (6) include an elastic elastic band three (601) arranged along the length direction of the back waist (4) and an elastic elastic band four (602) arranged along the width direction of the back waist (4). The elastic elastic band three (601) has an elastic elongation ratio of 1.5-2.5 times, and the elastic elastic band four (602) has an elastic elongation ratio of 2.0 times.

2. The elastic waistband diaper according to claim 1, characterized in that, The front waistband (3) includes an upper and lower composite nonwoven fabric layer one (301) and a nonwoven fabric layer two (302). An elastic elastic band group one (5) composed of several elastic elastic bands is sandwiched between the nonwoven fabric layer one (301) and the nonwoven fabric layer two (302). The elastic elastic band group one (5) is sandwiched between the nonwoven fabric layer one (301) and the nonwoven fabric layer two (302) by a composite roller and pressed together.

3. The elastic waistband diaper according to claim 1, characterized in that, The back waistband (4) includes a non-woven fabric layer three (401) and a non-woven fabric layer four (402) that are composited on the upper and lower sides. An elastic elastic band group two (6) composed of several elastic elastic bands is sandwiched between the non-woven fabric layer three (401) and the non-woven fabric layer four (402). The elastic elastic band group two (6) is sandwiched between the non-woven fabric layer three (401) and the non-woven fabric layer four (402) and pressed tightly by a composite roller.

4. The elastic waistband diaper according to claim 1, characterized in that, The cavity interlayer (7) is integrally formed by folding the front waistband (3). The upper edge of the front waistband (3) is folded towards the side away from the human body, and after extending to the bottom height of the front waistband (3), it is folded a second time towards the upper edge of the front waistband (3) and extends to be flush with the upper edge of the front waistband (3). The edges of the two sides and the bottom of the cavity interlayer (7) are fixed to the front waistband (3) by ultrasonic welding. The cavity interlayer (7) has an opening (703) near the upper edge of the front waistband (3).

5. The elastic waistband diaper according to claim 1, characterized in that, In the above scheme, the cavity interlayer (7) includes a first interlayer (701) on the side close to the human body surface and a second interlayer (702) on the side away from the human body. The first interlayer (701), the second interlayer (702) and the front waistband (3) are an integral structure. An elastic band five (8) is provided between the second interlayer (702) and the front waistband (3). The elastic band five (8) and the elastic band in the front waistband (3) are staggered.

6. A manufacturing process for an elastic waistband diaper as described in any one of claims 1 to 5, characterized in that, include: Step 1: Unwinding and conveying the bottom non-woven fabric layer; the bottom non-woven fabric layer has a length direction along the conveying direction and a width direction perpendicular to the conveying direction. Several individual diapers are arranged along the length direction of the bottom non-woven fabric layer. A front waist area, an absorbent area, and a back waist area are arranged along the width direction of the bottom non-woven fabric layer and aligned with the positions of the individual diapers. Step 2: Lay the elastic bands; Lay the elastic bands on the front waistband and back waistband areas of the bottom non-woven fabric layer; Step 3: Unwinding and conveying the surface non-woven fabric layer and applying adhesive; an adhesive surface is provided on the side of the surface non-woven fabric layer facing the bottom non-woven fabric layer. The adhesive surface is aligned with the front waist area and applied into several adhesive strips (303) by the adhesive scraper. The adhesive surface is aligned with the back waist area and applied into an adhesive surface (403) by the adhesive scraper. Step 4: Composite bonding using a composite roller; the bottom nonwoven fabric layer and the top nonwoven fabric layer are bonded together using a composite roller to obtain a composite nonwoven fabric layer; Step 5: Cut off the leg circumference and cut into individual products; cut into individual diaper pieces on the composite nonwoven fabric layer using a cutting roller, and cut arc-shaped leg openings (703) on both sides of the individual diaper pieces. Step 6: Fold over once; Fold the front waist area of ​​the diaper along the central axis of the two leg openings (703) toward the back waist area; Step 7: Secondary folding and welding; Fold the two ends of the rear waist area in a clamp shape towards the front waist area and weld them together at the two ends of the front waist area in the length direction using ultrasonic welding. Step 8: Three-fold welding; Align the front waist area with the upper edge of the back waist (4), that is, fold the lower one-third of the front waist area outward and weld it to the front waist area by ultrasonic welding; Step 9: Four-fold welding; the lower half of the front waist area after folding is folded towards the upper edge of the front waist area, and a cavity sandwich is formed on the front waist area by ultrasonic welding (7).

7. The manufacturing process of the elastic waistband diaper according to claim 6, characterized in that, in, In step two, elastic band one (501) is laid at equal intervals along the length of the front waist area, elastic band two (502) is laid at equal intervals along the width of the front waist area, elastic band three (601) is laid at equal intervals along the length of the back waist area, and elastic band four (602) is laid at equal intervals along the width of the back waist area.

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