Tape-fastened disposable diapers

Abstract

To provide a tape-fixing-type paper diaper to be an outer with improved fixing property of a large-sized inner pad in particular and a suppressed sense of pressure.SOLUTION: A tape-fixing paper diaper is divided into a front body, a back body, and a crotch part positioned between the front body and the back body, and has a top sheet, a back sheet, an absorber, side flaps, a fastening tape and gathers around legs. The rate expressed by(dimension in the width direction of the absorber in the crotch part) / (dimension in the width direction of the tape-fixing paper diaper when the fastening tape is stretched by 20N tensile force) is between 19% and 29%, stretch rate in the width direction of the side flap when the side flaps is stretched by 20N tensile force in the width direction is between 110% and 130%, and stretch rate of the gathers around legs in a longitudinal direction when the gathers around legs are stretched by 20N tensile force is between 160% and 180%.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a disposable diaper with elastic tape fastening. [Background technology]

[0002] In intensive care, tape-type disposable diapers are commonly used as outer layers with urine absorption pads as inner layers. In this case, if the inner pad is not tightly fitted to the body, leakage may occur. To ensure a good fit, the fastening tape must be tightly wrapped around the waist to secure the diaper in place. However, since the diaper must be worn for long periods of time, the care recipient may feel pressure and loosen the fit, resulting in numerous cases of leakage.

[0003] In recent years, with the chronic shortage of care workers, it has become difficult to ensure sufficient frequency of change, and as a result, diapers tend to feel stiff when combined with the relatively large inner pads worn at night, and the pressure felt when wearing them places a considerable psychological and physical burden on the care recipient. Therefore, there is a demand for tape-fastened disposable diapers that do not feel pressured and do not leak, even when combined with a large inner pad to improve the fit.

[0004] As an example of a tape-fastened disposable diaper, Patent Document 1 discloses an absorbent article in which the lengths of two slits in the tape fastening with stretchable side panels are specified to improve fit and reduce leakage, and the long slits improve deformability, resulting in a stable fit when worn in the usual manner. Patent document 2 also discloses a disposable diaper having elastic side panels extending from both side edges of an absorbent body, the side panels having an elastic portion in which multiple elastic members are spaced apart between two sheets of nonwoven fabric, and a tab with a fastening portion at the tip, the portion of the elastic portion located in the range having the tab in a direction intersecting the extension direction of the side panel (Y direction) being a high-elongation stress portion with high elongation stress, and the portion located closer to the crotch portion than the high-elongation stress portion in the same direction (Y direction) being a low-elongation stress portion with lower elongation stress than the high-elongation stress portion. Patent Document 3 discloses a tape-fastened absorbent article that has a groove-shaped portion provided in the absorbent body in the crotch area, extending in the longitudinal direction, and an elastic portion provided in the longitudinal direction at a position overlapping the absorbent body in the thickness direction, a first absorbent body portion in the absorbent body with the groove-shaped portion provided, and a second absorbent body portion in the absorbent body that includes an area in the direction in which the groove-shaped portion extends virtually and has a smaller basis weight than the first absorbent body portion. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2017-051281 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-125353 [Patent Document 3] Japanese Patent Application Publication No. 2018-175885 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the absorbent article disclosed in Patent Document 1 is used in combination with a large inner pad designed for long-term use, the deformability of the slits and the rigidity of the tape-fastened absorber may be insufficient depending on the posture, making it impossible to ensure proper adhesion.Furthermore, sufficient consideration is not given to the feeling of pressure felt by the wearer.

[0007] Furthermore, the fixation of the inner pad when used in combination with an inner pad is not considered for the disposable diaper described in Patent Document 2. The absorbent article disclosed in Patent Document 3 is not considered in terms of stretchability in the width direction, and the fixation of the inner pad when used in combination with an inner pad is insufficient.

[0008] Therefore, the present invention has been made in consideration of the above problems, and aims to provide a tape-fastened disposable diaper, which is an outer that improves the fixation of particularly large inner pads and reduces the feeling of pressure. [Means for solving the problem]

[0009] The inventors of the present invention have conducted extensive research and have found that the above-mentioned problems can be solved by limiting the width of the absorbent core crotch portion of a tape-fastened disposable diaper to a predetermined width, providing appropriate stretchability to the fastening tape, and further improving the shape of the absorbent core around the buttocks. Specifically, the present invention provides the following.

[0010] (1) A first aspect of the present invention is a garment divided into a front body, a back body, and a crotch section located between the front body and the back body, and comprising: a liquid-permeable top sheet; a liquid-impermeable back sheet; an absorbent body located between the top sheet and the back sheet; side flaps located at both widthwise ends of the rear body and stretchable in the width direction; fastening tapes extending widthwise from each widthwise end of the side flaps to the outside of the side flaps and located at two locations along the longitudinal direction at each widthwise end of the side flaps, and having engaging portions with hook-and-loop fasteners for engaging the front body and the back body; a target tape provided on the surface of the back sheet in the front body and capable of detachably engaging with the engaging portions of the fastening tape; and leg circumferences located in the crotch section at a widthwise distance from both ends of the absorbent body and equipped with elastic members stretchable in the longitudinal direction. a tape-fastened disposable diaper having a back gather and a back gather arranged near the longitudinal end of the rear body and having an elastic member stretchable in the width direction, wherein the width dimension of the tape-fastened disposable diaper at the crotch portion is 250 mm or more and 320 mm or less, the width dimension of the absorber at the crotch portion is 160 mm or more and 220 mm or less, and the fastening tape is tensioned with a tension of 20 N by (the width dimension of the absorber at the crotch portion) / (the tension of the fastening tape at the crotch portion) The tape-fastened disposable diaper is characterized in that the ratio represented by the width (maximum width dimension in the width direction of the tape-fastened disposable diaper when stretched) is 19% or more and 29% or less, the widthwise elongation rate of the side flaps when stretched in the width direction with a tension of 20 N is 110% or more and 130% or less, and the longitudinal elongation rate of the leg gathers when stretched in the longitudinal direction with a tension of 20 N is 160% or more and 180% or less.

[0011] (2) A second aspect of the present invention is a tape-fastened disposable diaper as described in (1), characterized in that when the fastening tape is stretched in the width direction with a tension of 20 N, the elongation rate of the longest width of the tape-fastened disposable diaper in the width direction is 125% or more and 135% or less.

[0012] (3) A third aspect of the present invention is a tape-fastened disposable diaper as described in (1) or (2), characterized in that when the back gathers are stretched in the width direction with a tension of 20 N, the stretch rate of the back gathers in the width direction is 160% or more and 180% or less.

[0013] (4) The fourth aspect of the present invention is a tape-fastened paper diaper according to any one of (1) to (3), characterized in that the left and right sides of the absorbent body in the rear body are approximately circular, with a radius of curvature of R100 mm or more and R180 mm or less.

[0014] (5) A fifth aspect of the present invention is a tape-fastened disposable diaper as described in any one of (1) to (4), characterized in that when the tape-fastened disposable diaper is unfolded while maintaining the state when stretched in the width direction with a tension of 20 N, when a first imaginary line extending in the width direction from the longitudinal center of the fastening tape on the front body side and a second imaginary line extending in the width direction from the longitudinal center of the fastening tape on the back body side are drawn, the first imaginary line intersects with the side of the approximately circular absorbent body, and the second imaginary line does not intersect with the side of the approximately circular absorbent body. [Effects of the Invention]

[0015] Therefore, according to the present invention, it is possible to provide a tape-fastened disposable diaper, which is an outer diaper that improves the fixation of a particularly large inner pad and reduces the feeling of pressure. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a plan view of a tape-fastened disposable diaper according to the present invention. [Figure 2] FIG. 2 is an enlarged view of the rear portion of the tape-fastened disposable diaper of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention (hereinafter referred to as "embodiments") will be described in detail with reference to the accompanying drawings. These embodiments are provided for illustrative purposes and are not intended to limit the present invention. Note that the same elements are designated by the same reference numerals throughout the description of the embodiments.

[0018] In the description of this specification, "wearing the tape-fastened disposable diaper 1" refers to at least one of the state during and after the tape-fastened disposable diaper 1 is worn. The longitudinal direction of the tape-fastened disposable diaper 1 is the direction extending from the front to the back of the wearer when the tape-fastened disposable diaper 1 is worn, and is indicated by the symbol Y in the drawings. The width direction of the tape-fastened disposable diaper 1 is the direction transverse to or perpendicular to the longitudinal direction, and is indicated by the symbol X in the drawings. Furthermore, the "skin-contacting surface" refers to the surface of each component, such as the absorbent, that faces the wearer's skin when worn, and the "non-skin-contacting surface" refers to the surface of each component, such as the absorbent, that faces away from the wearer's skin when worn. Body fluids refer to liquids excreted from the body to the outside, such as urine, blood, and water in loose stools. Furthermore, the tape-fastened disposable diaper 1 is particularly exemplified as a tape-fastened disposable diaper that also uses an inner pad, but is not limited thereto and may be other tape-fastened disposable diapers.

[0019] <Tape-fastened disposable diapers> FIG. 1 is a plan view of a tape-fastened disposable diaper 1 according to an embodiment of the present invention, viewed from the top sheet 10 side. As shown in FIG. 1, the tape-fastened disposable diaper 1 is divided into a front body section 2, a back body section 3, and a crotch section 4 located between the front body section 2 and the back body section 3. The tape-fastened disposable diaper 1 also has a liquid-permeable top sheet 10 arranged on the skin-contacting side, a liquid-impermeable back sheet 20 arranged on the non-skin-contacting side opposite the top sheet 10, and an absorbent body 30 arranged between the top sheet 10 and the back sheet 20. As a result, the absorbent body 30 is sandwiched between the top sheet 10 and the back sheet 20.

[0020] The longitudinal dimension of the tape-fastened disposable diaper 1 is preferably 650 mm or more and 1100 mm or less. The widthwise dimension of the front body 2 is preferably 380 mm or more and 790 mm or less, and the widthwise dimension of the back body 3 is preferably 535 mm or more and 1115 mm or less. Furthermore, the widthwise dimension of the crotch portion 4 is preferably 250 mm or more and 320 mm or less, and 270 mm or more and 310 mm or less. By adjusting the dimensions of the tape-fastened disposable diaper 1 within the above ranges, a tape-fastened disposable diaper 1 can be obtained that improves the fixation of the inner pad and reduces the feeling of pressure.

[0021] <Top sheet> The top sheet 10 may be formed from a liquid-permeable substrate that allows bodily fluids to move into the absorbent body 30, and may be, for example, a known hydrophilic nonwoven fabric such as a thermal-bonded nonwoven fabric or a spun-bonded nonwoven fabric. Furthermore, the surface of the top sheet 10 may be embossed or perforated to improve liquid permeability. Any known method can be used for embossing or perforating the top sheet 10 without limitation. Furthermore, to reduce irritation to the skin, the top sheet 10 may contain lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizers, and the like. From the viewpoints of strength, processability, and liquid return, the basis weight of the top sheet 10 is 15 g / m 2 More than 40g / m 2 Preferably, it is 18 g / m or less. 2 More than 25g / m 2 The following is more preferable: There are no particular restrictions on the shape of the top sheet 10, as long as it has a shape that covers the absorbent body 30 and is necessary to guide bodily fluids to the absorbent body 30 without leakage.

[0022] <Back seat> The backsheet 20 may be formed using a liquid-impermeable substrate that prevents the body fluids held by the absorbent body 30 from wetting clothing, and a breathable or non-breathable, liquid-impermeable plastic film may be used.

[0023] From the viewpoint of strength and processability, the basis weight of the back sheet 20 is 20 g / m 2 More than 45g / m 2 Preferably, it is 30 g / m or less. 2 More than 38g / m 2 The following is more preferable: To provide breathability to the back sheet 20, for example, a filler may be blended into the resin film of the base material, or the back sheet 20 may be embossed. An example of the filler is calcium carbonate, and the blending method may be any known method without limitation.

[0024] <Absorbent> In the tape-fastened disposable diaper 1 of the present invention, the longitudinal dimension of the absorber 30 is preferably 470 mm or more and 880 mm or less. The widthwise dimension of the absorber 30 in the front body section 2 is preferably 220 mm or more and 450 mm or less, and the widthwise dimension of the absorber 30 in the back body section 3 is preferably 220 mm or more and 450 mm or less. Furthermore, the widthwise dimension of the absorber 30 in the crotch section 4 is preferably 160 mm or more and 220 mm or less, and 180 mm or more and 210 mm or less. Furthermore, the left and right absorber side surfaces 31 in the rear body 3 are generally circular, and their radii of curvature are preferably between R100 mm and R180 mm, and more preferably between R110 mm and R150 mm. Some caregivers who are in need of care are unable to change their position by themselves and are forced to turn from their back to their side, etc., over a period of time. However, in the case of care recipients with poor skin condition, excessive pressure may be applied to the buttocks when lying on their side due to the absorption capacity of the thick large inner pad. By setting the radii of curvature of the absorber side surfaces 31 in the rear body 3 of the tape-fastened disposable diaper 1 of the present invention within the above-mentioned range, body pressure when lying on their side using the large inner pad can be reduced.

[0025] (absorbent fiber) The absorbent body 30 contains absorbent fibers as a base material and a superabsorbent polymer. The absorbent fiber is not particularly limited as long as it is one generally used in absorbent articles such as incontinence products and urine absorption pads, and examples thereof include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic nonwoven fabric, etc. Among these, fluff pulp is preferably used from the viewpoint of absorbency. Examples of fluff pulp include wood pulp (for example, bleached coniferous kraft pulp (N-BKP) such as southern pine or Douglas fir), synthetic fiber, resin fiber, non-wood pulp, etc., which have been defibrated into a cotton-like state. When fluff pulp is used as the absorbent fiber base material in the absorber 30, the basis weight of the absorbent fiber is 100 g / m 2 More than 580g / m 2 Preferably, it is 150 g / m or less. 2 More than 400g / m 2 This allows the fabric to absorb more body fluids without impairing the feel against the skin.

[0026] (Superabsorbent polymer) There are no particular restrictions on the superabsorbent polymer (SAP) of the absorbent body 30, as long as it can absorb body fluids and prevent backflow, and among these, a superabsorbent resin is preferred from the viewpoint of absorption per weight. The basis weight of the superabsorbent polymer contained in the absorbent body 30 is 50 g / m 2 More than 250g / m 2 Preferably, it is 60 g / m or less. 2 More than 170g / m 2 More preferably, it is:

[0027] <Side flap> The tape-fastened disposable diaper 1 of the present invention has side flaps 40 that are stretchable in the width direction and are arranged at both widthwise ends of the rear body 3. The longitudinal dimension of each side flap 40 is preferably 150 mm or more and 250 mm or less, and the widthwise dimension of each side flap 40 is preferably 175 mm or more and 220 mm or less. When the side flaps 40 are stretched in the width direction with a tension of 20 N, the elongation rate of the side flaps 40 is 110% to 130%, and preferably 110% to 120%. By setting the elongation rate within the above range, when a large inner pad is used in combination with the tape-fastened disposable diaper 1, the inner pad is well fixed, which helps prevent leakage and reduces the feeling of pressure when worn for long periods of time.

[0028] The stretching method involved placing the tape-fastened disposable diaper 1 on a flat surface, fixing one end of the side flap 40 in the width direction, and pulling the other end using a force gauge to measure the dimension when a stress of 20 N was generated. All stretch rates, including the stretch rate of the side flap 40, in the tape-fastened disposable diaper 1 of the present invention were calculated using the following formula. Elongation rate (%) = (dimension when product is stretched with a force of 20N in an unfolded state) / (dimension when product is laid flat in its natural state without tension in an unfolded state) x 100 (%)

[0029] <Fastening tape> The tape-fastened disposable diaper 1 of the present invention has fastening tapes 50 that extend widthwise from each widthwise end of the side flaps 40 to the outside of the side flaps 40 and are arranged in two locations along the longitudinal direction at each widthwise end of the side flaps 40. The fastening tapes 50 have engaging portions equipped with hook-and-loop fasteners, and engage with target tapes 60 (described below) via these engaging portions to connect the front body piece 2 and the back body piece 3. The widthwise dimension of the fastening tapes 50 is preferably 15 mm or more and 40 mm or less.

[0030] Furthermore, when the fastening tape 50 is stretched in the width direction with a tension of 20 N, the elongation rate of the maximum width in the width direction of the tape-fastened disposable diaper 1 is preferably 125% to 135%, and more preferably 128% to 132%. By keeping the elongation rate within the above range, when a large inner pad is used in combination with the tape-fastened disposable diaper 1, the inner pad will stay firmly in place, preventing leakage and reducing the feeling of pressure when worn for long periods of time.

[0031] Furthermore, the ratio of the absorbent body 30 and the fastening tape 50, expressed as (the widthwise dimension of the absorbent body 30 in the crotch region 4) / (the maximum widthwise dimension of the tape-fastened disposable diaper 1 when the fastening tape 50 is stretched under a tension of 20 N), is preferably 19% to 29%, and more preferably 20% to 25%. By keeping this ratio within the above range, the inner pad will be well-adhered when used in combination with a large inner pad, which will help prevent leakage and reduce the feeling of pressure when worn for long periods of time. Note that the maximum widthwise dimension of the tape-fastened disposable diaper 1 here refers to the sum of the widthwise dimensions of the back body 3, each of the left and right side flaps 40, and each of the left and right fastening tapes 50 of the tape-fastened disposable diaper 1.

[0032] Fig. 2 is an enlarged view of the rear body section 3 of the tape-fastened disposable diaper 1 of the present invention. As shown in Fig. 2, when the tape-fastened disposable diaper 1 of the present invention is unfolded while being stretched in the width direction with a tension of 20 N, if a first imaginary line L1 extending in the width direction from the longitudinal center of the fastening tape 50 on the front body section 2 side and a second imaginary line L2 extending in the width direction from the longitudinal center of the fastening tape 50 on the back body section 3 side are drawn, it is preferable that the first imaginary line L1 intersects with the substantially circular absorber side surface 31, and the second imaginary line L2 does not intersect with the substantially circular absorber side surface 31. When the wearer lies on their side and bends their legs and waist, the thickness of the inner pad may cause excessive tightening around the waist, which may lead to blood congestion or other skin damage. The above-mentioned radius of curvature of the absorbent body side surface 31 and the positional relationship with the fastening tape 50, combined with the elongation rate of the fastening tape 50, allows the absorbent body to follow the body while maintaining a certain degree of adhesion, thereby reducing excessive pressure on the waist. Note that the first imaginary line L1 and the second imaginary line L2 are preferably spaced apart from each other by 80 mm to 120 mm in the longitudinal direction.

[0033] <Target tape> The target tape 60 is provided on the surface of the back sheet 20 of the front body 2, and can be detachably engaged with the engaging portion of the fastening tape 50. By engaging the target tape 60 with the engaging portion of the fastening tape 50, the front body 2 and the back body 3 are engaged, and the tape-fastened disposable diaper 1 can be put on. The longitudinal dimension of the target tape 60 is preferably 100 mm or more and 200 mm or less, and the width dimension is preferably 280 mm or more and 500 mm or less.

[0034] <Gathered around the legs> The tape-fastened disposable diaper 1 of the present invention has leg gathers 70 in the crotch portion 4, each of which is disposed widthwise further away from both ends of the absorbent body 30 and has an elastic member that stretches in the longitudinal direction. The longitudinal dimension of the leg gathers 70 is preferably 330 mm or more and 590 mm or less. The elongation percentage of the leg gathers 70 when stretched in the longitudinal direction with a tension of 20 N is 160% to 180%, and preferably 165% to 175%. By setting the elongation percentage within the above range, when a large inner pad is used in combination with the tape-fastened disposable diaper 1, the inner pad will be well-fixed, which will help prevent leakage and reduce the feeling of pressure when worn for long periods of time.

[0035] <Back gathers> The tape-fastened disposable diaper 1 of the present invention has back gathers 80 that are arranged near the longitudinal ends of the back body 3 and have elastic members that stretch in the width direction. The longitudinal dimension of the back gathers 80 is preferably 25 mm to 55 mm, and the width dimension is preferably 100 mm to 350 mm. When the back gathers 80 are stretched in the width direction with a tension of 20 N, the stretch rate of the back gathers 80 is preferably 160% to 180%, and more preferably 167% to 178%. By setting the stretch rate within the above range, when a large inner pad is used in combination with the tape-fastened disposable diaper 1, the inner pad will be well-adhered, which will help prevent leakage and reduce the feeling of pressure when worn for long periods of time.

[0036] <Inner pad> As described above, the tape-fastened disposable diaper 1 of the present invention is preferably used in combination with an inner pad. The inner pad, like the tape-fastened disposable diaper 1 of the present invention, is preferably divided into a front body section, a back body section, and a crotch section between the front and back bodies, and has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. The thickness of the inner pad used in conjunction with the tape-fastened disposable diaper 1 of the present invention is preferably 5.0 mm or more and 8.6 mm or less, and the ratio of the widthwise dimension of the crotch portion 4 of the absorbent body 30 of the tape-fastened disposable diaper 1 of the present invention to the widthwise dimension of the crotch portion 4 of the absorbent body 30 of the tape-fastened disposable diaper 1 of the present invention is preferably 90% or more and 111% or less.

[0037] Although the present invention has been described above using embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments and examples. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. Furthermore, it is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention. [Example]

[0038] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the examples shown below.

[0039] Tape-fastened disposable diapers and inner pads of Examples and Comparative Examples having the dimensions and configurations shown in Table 1 below were prepared and subjected to monitor evaluation. As a monitor evaluation, 10 panelists who wear disposable diapers on a daily basis were asked to wear the outer tape-fastened disposable diaper of the present invention and the highly absorbent overnight inner diaper overnight (10 hours) and were asked to report on the presence or absence of a feeling of pressure. In addition, the care staff who put on and changed the disposable diapers of the present invention for the 10 panelists were asked to report on whether they had noticed any leakage or slippage or creases of the inner pad after wearing them. ○: When 8 to 10 people "did not feel any pressure" or "did not notice any leakage, slippage, or creases" △: When 5 to 7 people "did not feel any pressure" or "did not notice any leakage, slippage, or creases" ×: When there are no cases where "I didn't feel any pressure" or "I didn't notice any leakage, slippage, or creases" or when there are 4 or fewer people The results are shown in Table 1.

[0040] [Table 1]

[0041] The examples based on the present application showed good results, with no feeling of pressure even when worn overnight, and no leakage, pad slippage, or creases were observed. On the other hand, Comparative Example 1 caused a feeling of pressure in the buttocks depending on the body position, such as sleeping on one's side. Comparative Example 2 had a radius of curvature on the side of the absorbent core that was outside the range of the present application, resulting in results similar to the roughly rectangular shape of Comparative Example 1. Comparative Example 3 had a tape-fastened disposable diaper with a large width dimension in the crotch area of ​​the absorbent core, which caused the crotch area to become bulky and compressed when used in conjunction with an inner pad. Furthermore, the inner pad slipped when changing body position, resulting in leakage. Comparative Example 4 had insufficient stretch around the waist, resulting in a feeling of pressure. Comparative Example 5 had insufficient stretch around the legs, resulting in leakage around the legs (crotch area). From the above results, it can be seen that by using the tape-fastened disposable diaper of the present invention, it is possible to reduce the feeling of pressure and leakage when worn for a long period of time in combination with a large inner pad. [Explanation of symbols]

[0042] 1 Tape-fastened disposable diaper 2 Front 3 Back 4 Crotch 10 Topsheet 20 Back Seat 30 absorber 31 Absorbent side 40 Side Flap 50 Fastening Tape 60 Target Tape 70 Gathered leg 80 Gathered back

Claims

1. It is divided into a front body, a back body, and a crotch part located between the front body and the back body, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet; Side flaps are arranged at both ends of the back body in the width direction and are stretchable in the width direction; a fastening tape extending from each end of the side flaps in the width direction to the outside of the side flaps in the width direction, and arranged at two locations along the longitudinal direction at each end of the side flaps in the width direction, the fastening tape having an engaging portion equipped with a hook-and-loop fastener for engaging the front body and the back body; a target tape provided on the surface of the back sheet in the front body and capable of removably engaging with the engaging portion of the fastening tape; leg gathers arranged in the crotch portion at a widthwise distance from both ends of the absorbent body and having elastic members stretchable in the longitudinal direction; A tape-fastened disposable diaper having a back gather disposed near the longitudinal end of the rear body and having an elastic member stretchable in the width direction, The width of the absorbent body in the rear body section is longer than the width of the tape-fastened disposable diaper in the crotch section; The left and right side surfaces of the absorbent body in the rear body are generally circular and bulge outward in the width direction, and the radius of curvature is R104 mm or more and R170 mm or less, The width of the tape-fastened disposable diaper in the crotch region is 250 mm or more and 320 mm or less, and the width of the absorbent body in the crotch region is 160 mm or more and 220 mm or less, a ratio expressed as (the widthwise dimension of the absorbent body in the crotch portion) / (the longest widthwise dimension of the tape-fastened disposable diaper when the fastening tape is stretched in the widthwise direction with a tension of 20 N) is 19% or more and 29% or less; When the side flaps are stretched in the width direction with a tension of 20 N, the stretch rate of the side flaps in the width direction is 110% or more and 130% or less, The tape-fastened disposable diaper is characterized in that the longitudinal elongation rate of the leg gathers is 160% or more and 180% or less when the leg gathers are stretched in the longitudinal direction with a tension of 20N.

2. 2. The tape-fastened paper diaper according to claim 1, wherein when the fastening tape is stretched in the width direction with a tension of 20 N, the elongation rate of the longest width in the width direction of the tape-fastened paper diaper is 125% or more and 135% or less.

3. 3. The tape-fastened disposable diaper according to claim 1, wherein the back gathers have a widthwise elongation rate of 160% or more and 180% or less when stretched in the widthwise direction with a tension of 20 N.

4. 4. The tape-fastened disposable diaper according to claim 1, wherein when the tape-fastened disposable diaper is unfolded while maintaining the state when stretched in the width direction with a tension of 20 N, when a first imaginary line extending in the width direction from the longitudinal center of the fastening tape on the front body side and a second imaginary line extending in the width direction from the longitudinal center of the fastening tape on the back body side are drawn, the first imaginary line intersects with the side of the approximately circular absorbent body, and the second imaginary line does not intersect with the side of the approximately circular absorbent body.

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