Absorbent articles

Abstract

To provide an absorbent article capable of reducing breakage on a junction caused by motions of an attachment part.SOLUTION: There is provided an absorbent article comprising a vertical direction, a lateral direction and a cross direction being orthogonal each other, and the absorbent article (1) comprises: waistline parts (20, 30) comprising one side waistline part (20) and the other side waistline part (30); and a crotch part. End parts on at least one side in a lateral direction of the one side waistline part (20) and the other side waistline part (30) are joined by junctions (2a, 2b), and have an attachment part (5). A base end of the attachment part (5) is fixed to a waist part at a fixing part (F1), and a tip end of the attachment part (5) has an engagement part which is detachably engaged to a non skin side face of the waistline part (20, 30), and in the lateral direction, at least a part of the fixing part (F1) is separated from the junctions (2a, 2b).SELECTED DRAWING: Figure 1

Description

Technical Field

[0006] , , , , , ,

[0001] The present invention relates to absorbent articles.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1, there is known a disposable diaper that can be used as an open-type so-called tape diaper by separating a predetermined portion of a so-called pants-type diaper in which the waist circumference is annularly connected in advance.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the disposable diaper of Patent Document 1, since a fastening piece that can be fastened to the front body and each side portion of the front body and the back body are integrally joined at a joint portion, there is a risk that the joint portion may peel off due to movements such as the fastening operation of the fastening piece.

[0005] The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an absorbent article that reduces damage to the joint portion due to the movement of the fastening portion.

Means for Solving the Problems

[0006] The main invention for achieving the above object is having vertical, horizontal, and front-rear directions that are orthogonal to each other, an absorbent article having a waist circumference portion including one-side waist circumference portion and the other-side waist circumference portion, and a crotch portion, at least one end portion in the horizontal direction of the one-side waist circumference portion and the other-side waist circumference portion is joined at a joint portion, having a fastening portion, The base end of the fastening portion is fixed to the body part by the fixing portion. The tip of the fastening portion has an engaging portion that detachably engages with the non-skin side of the torso portion, In the left-right direction, at least a portion of the fixed portion is spaced apart from the joint portion. The fastening portion is a single member, The torso portion has a cutting guide portion for guiding the cutting of at least a part of the torso portion, In the left-right direction, the cutting guide portion is provided on the other side of the joint portion. In its natural state, when the absorbent article is viewed from one side of the torso in the front-rear direction, The portion where the vertical length of the fastening portion is longer than the vertical length of the one-sided waist portion Yes, The fastening portion is fixed to the one side of the torso by the fixing portion. The engaging portion is detachably engaged with the non-skin side of the one-sided torso portion, The aforementioned one-sided torso portion has, in the left-right direction, an expandable region that expands and contracts in the left-right direction and a non-expandable region that does not expand or contract in the left-right direction, between the joint portion and the fixing portion. In the left-right direction, the expandable / contractible region is adjacent to the joint from the other side, and the non-expandable / contractible region is adjacent to the fixed portion from the one side. This is an absorbent article characterized by the following features. Other features of the present invention will be made clearer by description in this specification and the accompanying drawings. [Effects of the Invention]

[0007] According to the present invention, the risk of damage to the joint due to movement of the fastening part can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a disposable diaper 1 in a worn state. [Figure 2] This is a plan view of a diaper 1 in its natural state, seen from the ventral waist area 20 side. [Figure 3] This is a plan view of diaper 1 in its unfolded and extended state, seen from the non-skin side. [Figure 4] This is an enlarged view of part X in Figure 3. [Figure 5]It is a diagram for explaining the separation of the ventral trunk circumference part 20 and the formation of the trunk circumference opening. [Figure 6] It is a diagram for explaining the operation of cutting the ventral trunk circumference part 20. [Figure 7] It is an enlarged view of the ventral trunk circumference part 20 in FIG. 3.

Embodiments for Carrying Out the Invention

[0009] From the descriptions in this specification and the attached drawings, at least the following matters become clear. An absorbent article having a vertical direction, a left - right direction, and a front - back direction that are perpendicular to each other, a trunk circumference part having one - side trunk circumference part and the other - side trunk circumference part, and a crotch part, wherein at least one - side end of the one - side trunk circumference part and the other - side trunk circumference part in the left - right direction is joined at a joining part, has a fastening part, a base end part of the fastening part is fixed to the trunk circumference part by a fixing part, a tip end part of the fastening part has an engaging part that separably engages with a non - skin side surface of the trunk circumference part, and in the left - right direction, at least a part of the fixing part is separated from the joining part. The absorbent article is characterized by this.

[0010] According to such an absorbent article, the risk of damage to the joining part due to the movement of the fastening part can be reduced.

[0011] Regarding such an absorbent article, it is desirable that all of the fixing part is separated from the joining part in the left - right direction.

[0012] According to such an absorbent article, the risk of the joining of the joining part being damaged due to the movement of the fastening part can be reduced.

[0013] Regarding such an absorbent article, it is desirable that the fastening part is fixed to the one - side trunk circumference part by the fixing part, and the engaging part separably engages with the non - skin side surface of the one - side trunk circumference part.

[0014] Such absorbent materials can reduce the risk of the joint breaking due to movement of the fastening part.

[0015] In such an absorbent article, the waist portion has a cutting guide portion for guiding the cutting of at least a part of the waist portion, and it is desirable that the cutting guide portion is provided on the other side of the joint portion in the left-right direction.

[0016] With such absorbent materials, the risk of damage to the joint at the connection point can be reduced when cutting the torso portion with the cutting guide section.

[0017] In such an absorbent article, it is desirable that at least a portion of the fixing portion also serves as a cutting guide portion when cutting at least a portion of the torso portion.

[0018] With such absorbent materials, there is no need to provide cutting guides through new processes such as perforations, and the risk of damage to the joint when cutting the waist portion can be reduced.

[0019] In such an absorbent article, when the absorbent article is contained in a package, the fastening portion is folded back on one side in the left-right direction from the rear in the front-rear direction toward the front in the front-rear direction, and when the absorbent article is viewed from the one side of the waist portion in the front-rear direction, it is desirable that the base end of the fastening portion is located at the rearmost part of the absorbent article and the tip of the fastening portion is located at the frontmost part of the absorbent article.

[0020] With such absorbent materials, the fastening portion is generally more rigid than the body portion. Therefore, when removing the absorbent material from the packaging, it can be removed by holding the fastening portion rather than the joint, thus reducing the risk of damage to the joint.

[0021] In such an absorbent article, it is desirable that the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, and in the left-right direction, the fixing portion is provided on the other side of the joint portion, the engaging portion is provided on the other side of the fixing portion, and the fastening portion has an unfixed portion that is provided on one side of the fixing portion and on the other side of the joint portion and is not fixed to the one-sided waist portion.

[0022] With such an absorbent material, the portion between the fixing part and the joint in the left-right direction of one side of the torso can be covered with a part of the fastening part, thus reducing the risk of damage to the portion between the fixing part and the joint.

[0023] In such an absorbent article, it is desirable that, in its natural state, when the absorbent article is viewed from one side of the waist in the front-to-back direction, the length of the fastening portion in the vertical direction is longer than the length of the one side of the waist in the vertical direction.

[0024] With such absorbent materials, the portion where the vertical length of the fastening part is longer than the vertical length of the one-sided waistband becomes easier to grip due to the higher rigidity of the fastening part, thus making it easier to prevent damage to the one-sided waistband and joint.

[0025] In such an absorbent article, at least a portion of the fixing portion also serves as a cutting guide portion when cutting at least a portion of the waist portion, and the fastening portion includes a fixing means region provided with fixing means for forming the fixing portion, and it is desirable that the vertical length of the fixing means region is longer than the vertical length of the joint portion.

[0026] With such an absorbent material, the fixing means area is made longer than the vertical length of the torso to be cut, making it easier to separate the torso with the cutting guide portion as the boundary.

[0027] ) In such an absorbent article, it is desirable that the force required to separate the fixed portion is greater than or equal to the force required to separate the joint portion.

[0028] With such absorbent materials, the risk of the joint separating due to the movement of the fastening part is reduced, while the risk of the fixing part separating due to the movement of the fastening part is also reduced.

[0029] In such an absorbent article, the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, and it is desirable that the one-sided waist portion has an expandable and contractible region that expands and contracts in the left-right direction between the joining portion and the fixing portion.

[0030] With such absorbent materials, the expansion and contraction area cushions the movement of the fastening part, reducing the risk of damage to the part between the joint and the fixed part.

[0031] In such an absorbent article, the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, and it is desirable that the one-sided waist portion has a non-stretchable region between the joining portion and the fixing portion that does not stretch in the left-right direction.

[0032] With such absorbent materials, the portion between the joint and the fixing part does not expand or contract, making it easier to apply force directly to the fastening part, and thus facilitating engagement and adjustment of the fastening part.

[0033] In such an absorbent article, the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, and the one-sided waist portion has, in the left-right direction, an expandable region that expands and contracts in the left-right direction and a non-expandable region that does not expand and contract in the left-right direction between the joining portion and the fixing portion, preferably the expandable region is adjacent to the joining portion from the other side, and the non-expandable region is adjacent to the fixing portion from the one side.

[0034] With such absorbent materials, the expansion and contraction area buffers the movement of the fastening part, reducing the risk of damage to the part between the joint and the fixed part, while also making it easier to directly apply the force that moves the fastening part to the fastening part, and making it easier to adjust the engagement of the fastening part.

[0035] The absorbent article is such that the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, and the one-sided waist portion has, in the left-right direction, an expandable region that expands and contracts in the left-right direction and a non-expandable region that does not expand and contract in the left-right direction between the joining portion and the fixing portion, and it is desirable that the length of the expandable region in the left-right direction is longer than the length of the non-expandable region in the left-right direction.

[0036] With such absorbent materials, the force that moves the fastening part is directly applied to the fastening part, while the expansion and contraction area buffers the movement of the fastening part, thereby reducing the risk of damage to the part between the joint and the fixed part.

[0037] The absorbent article is such that the fastening portion is fixed to the one-sided waist portion by the fixing portion, the engaging portion is detachably engaged with the non-skin side of the one-sided waist portion, in the left-right direction, the fixing portion is provided on the other side of the joining portion, the engaging portion is provided on the other side of the fixing portion, and the fastening portion has an unfixed portion that is provided on one side of the fixing portion and on the other side of the joining portion and is not fixed to the one-sided waist portion, and it is desirable that when the absorbent article is viewed from the one-sided waist portion side in the front-rear direction, there is a portion in which the non-stretchable region and the unfixed portion overlap.

[0038] With such an absorbent material, when the absorbent material is viewed from one side of the waist area, the non-fixed portion can easily cover the tip of the stretchable member in the non-stretchable region, thus improving the aesthetic appearance of the absorbent material.

[0039] In such an absorbent article, the one-sided waist portion is provided with a one-sided waist expansion / contraction region that expands and contracts in the left-right direction, and the other-sided waist portion is provided with a other-sided waist expansion / contraction region that expands and contracts in the left-right direction, and it is desirable that the force that stretches the one-sided waist expansion / contraction region per unit area by a predetermined distance in the left-right direction is greater than the force that stretches the other-sided waist expansion / contraction region per unit area by a predetermined distance.

[0040] With such absorbent articles, by providing stretchable members on both the one and the other waist sections, the fit to the wearer's waist is improved, while the stretchable member on the other waist section stretches more easily first. This reduces the risk of excessive force being applied to the joint due to the movement of the fastening part, which could cause the joint to break.

[0041] ===Implementation Method=== The embodiments of the present invention will be described below, using disposable pant-type diapers for infants as an example of the absorbent article according to the present invention. However, the absorbent article according to the present invention is not limited to disposable diapers for infants, but can also be used as disposable diapers for adults, sanitary shorts, etc.

[0042] ===Composition of Disposable Diaper 1=== Figure 1 is a perspective view of a disposable diaper 1 (hereinafter referred to as "diaper") in a worn state, viewed from one side in the left-right direction. Figure 2 is a plan view of the diaper 1 in its natural state, viewed from the ventral waist area 20 side. Figure 3 is a plan view of the unfolded and stretched diaper 1, viewed from the non-skin side. The center line CC in Figure 3, etc., is the center line in the left-right direction in the stretched state. Note that Figure 3 shows the unfolded and stretched state of the pant-type diaper 1 shown in Figures 1 and 2. Hereafter, the center line CC in the left-right direction of the diaper 1 in each figure is the center line in the stretched state.

[0043] The "natural state" refers to the state of diaper 1 after being left for a predetermined period of time. For example, diaper 1 in its product state is removed from its packaging, and the back waistband portion 30 is pulled outwards on both sides to create an "extended state" for the waistband portions 20 and 30. This extended state is maintained for 15 seconds, after which the tension on diaper 1 is released and it is placed on a flat surface such as a table. The state after 5 minutes in this flat, uncovered state is considered the natural state.

[0044] "Unfolded state" refers to the state in which the diaper 1 in its pant-type state has its joints 2a and 2b, the ends of the ventral waist section 20 and the ends of the dorsal waist section 30, separated and opened up to lay the entire diaper 1 flat. "Extended state" refers to the state in which the expandable members of the diaper 1 have been extended to the extent that the wrinkles of the diaper 1 are no longer visible. Specifically, this refers to the state in which the dimensions of each component constituting the diaper 1 (for example, the ventral waist section 20 described later) have been extended to the extent that they match or are close to the dimensions of the individual component.

[0045] Diaper 1, in the pant-type state shown in Figures 1 and 2, has vertical, horizontal, and front-to-back directions, and has a waist opening BH and a pair of leg openings LH. In the vertical direction, the waist opening BH side is considered the upper side, and the crotch side is considered the lower side. In the front-to-back direction, the wearer's abdominal side is considered the front, and the wearer's back side is considered the back. The direction in which the materials constituting diaper 1 are layered is called the thickness direction, the side in the thickness direction that comes into contact with the wearer is called the skin side, and the side opposite the skin side is called the non-skin side. The thickness direction is also the direction that aligns with the front-to-back direction in a natural state.

[0046] The diaper 1 on the pants side is a so-called three-piece type, and has an absorbent main body 10, an abdominal waist section 20, and a back waist section 30. The abdominal waist section 20 covers the wearer's abdomen, and the back waist section 30 covers the wearer's back. The diaper 1 also has fastening parts 5.

[0047] In the unfolded state of the diaper 1 shown in Figure 3, the ventral waist portion 20 and the dorsal waist portion 30 are positioned so that their longitudinal directions align with the left-right direction of the diaper 1. The crotch area 40 is formed by positioning one end of the absorbent body 10 in the longitudinal direction at the center of the ventral waist portion 20 in the left-right direction, and the other end of the absorbent body 10 in the longitudinal direction at the center of the dorsal waist portion 30 in the left-right direction. The absorbent body 10 is positioned closer to the skin than the ventral waist portion 20 and the dorsal waist portion 30.

[0048] The diaper 1 in its unfolded state as shown in Figure 3 is folded in half at approximately the center CL of the longitudinal direction of the absorbent body 10, with the longitudinal direction of the absorbent body 10 aligned with the vertical direction of the diaper 1. The ends of the ventral waist portion 20 and the ends of the dorsal waist portion 30 in the left-right direction of the diaper 1 are joined by heat welding, ultrasonic welding, etc., to form a pair of joints 2a and 2b, which result in the pant-type diaper 1 shown in Figures 1 and 2. Joint 2a is a joint provided on one side in the left-right direction, and joint 2b is a joint provided on the other side in the left-right direction.

[0049] The absorbent body 10 includes an absorbent core 11, a liquid-permeable top sheet 12 positioned closer to the skin than the absorbent core 11, a second sheet 13 positioned between the top sheet 12 and the absorbent core 11, a side sheet 14 positioned closer to the skin than the absorbent core 11 and the second sheet 13, a liquid-impermeable back sheet 15 positioned away from the skin than the absorbent core 11, and an outer sheet 16 positioned away from the skin than the back sheet 15.

[0050] The absorbent body 11 has a roughly rectangular shape in plan view and comprises an absorbent core A that absorbs and retains excretory fluids such as urine, and a liquid-permeable core wrap sheet (not shown) that covers the absorbent core. Examples of the absorbent core A include liquid-absorbent fibers such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape, for example, a roughly hourglass shape in plan view (molded liquid-absorbent fiber product), or a so-called SAP sheet formed by molding superabsorbent polymer (SAP) into a sheet. Alternatively, the absorbent core 11A may be formed by layering an SAP sheet and a molded liquid-absorbent fiber product in the thickness direction. For example, the absorbent core 11A may have a configuration in which an SAP sheet, a molded liquid-absorbent fiber product, and another SAP sheet are layered in order from the skin side in the thickness direction. The length of the absorbent core 11A of the diaper 1 in the left-right direction is approximately equal to the length of the absorbent body 11 in the left-right direction. Examples of the core wrap sheet include a liquid-permeable sheet such as tissue paper or nonwoven fabric. Note that a configuration without a core wrap sheet is also possible.

[0051] As shown in Figure 3, the leg-circumference elastic members 17 provided on both sides of the absorbent body 10 in the left-right direction constitute leg gathers. In the pant-type diaper 1, the leg gathers are provided along each leg-circumference opening LH, and the diaper 1 fits the wearer's legs through the expansion and contraction of the leg-circumference elastic members 17. The leg-circumference elastic members 17 of the diaper 1 are made of multiple elastic threads and are fixed between the back sheet 15 and the outer sheet 16, for example, between the outer sheet 16 which is folded inward in the left-right direction to form two layers, in a state where they are stretched in the longitudinal direction of the absorbent body 10.

[0052] The absorbent body 10 has leak-proof expandable wall members 18 on both sides in the left-right direction, inside the leg-circumference expandable members 17. Multiple leak-proof expandable wall members 18 are fixed between the two layers of side sheets 14 that are folded back outwards in the left-right direction, in a state that is extended in the longitudinal direction, forming a pair of leak-proof wall sections along the longitudinal direction. When the diaper 1 is worn, the expandability of the leak-proof expandable wall members 18 causes the leak-proof wall sections to stand up on the wearer's skin side and fit to the wearer's crotch area.

[0053] Examples of leg-type expandable members 17 and leak-proof wall expandable members 18 include rubber threads and expandable sheets.

[0054] The ventral torso section 20 has a skin-side sheet 21, a non-skin-side sheet 22, and a plurality of stretchable members 23. The skin-side sheet 21 and the non-skin-side sheet 22 are joined together by bonding means such as hot melt adhesives, or welding using heat or ultrasound. The skin-side sheet 21 and the non-skin-side sheet 22 are sheet members of approximately the same size and shape, and in this embodiment, they have a roughly rectangular shape. The non-skin-side sheet 22 is positioned on the non-skin side of the skin-side sheet 21. As the skin-side sheet 21 and the non-skin-side sheet 22, non-stretchable sheets such as SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, point-bond nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and laminated sheets thereof can be used.

[0055] Multiple stretchable members 23 of the ventral waist portion 20 are arranged vertically between the skin-side sheet 21 and the non-skin-side sheet 22, and are fixed in an extended state in the left-right direction. Therefore, the ventral waist portion 20 stretches in the left-right direction and fits the wearer's waist. Examples of stretchable members 23 include elastic materials such as rubber and spandex. The non-skin-side sheet 22 has an engaged portion 25 on its non-skin side that allows engagement of the engaging portion 51 (described later). The engaged portion 25 is a so-called target area, and examples include a nonwoven fabric sheet. Furthermore, if the male member of a hook-and-loop fastener is used for the engaging portion 51, it is desirable to select an engaged portion that corresponds to the engaging portion 51, such as using the female member of a hook-and-loop fastener for the engaged portion 25. Furthermore, instead of providing a separate member on the non-skin side of the non-skin sheet 22 as the engaged portion 25, the non-skin sheet 22 may be made of a member (for example, nonwoven fabric) that can engage with the engaging portion 51, and the non-skin side of the non-skin sheet 22 may be directly engaged with the engaged portion 51.

[0056] The back waist portion 30 has a skin-side sheet 31, a non-skin-side sheet 32, and a plurality of stretchable members 33. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are joined by bonding means such as adhesives such as hot melt, or welding using heat or ultrasound. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are sheet members of substantially the same size and substantially the same shape, and in this embodiment, they have a substantially rectangular shape. The non-skin-side sheet 32 ​​is positioned on the non-skin side of the skin-side sheet 31. As the skin-side sheet 31 and the non-skin-side sheet 32, for example, non-stretchable sheets such as polypropylene SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, point-bond nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and laminated sheets thereof can be used.

[0057] Multiple stretchable members 33 of the dorsal torso section 30 are arranged vertically between the skin-facing sheet 31 and the non-skin-facing sheet 32, and are fixed in an extended state in the left-right direction. Therefore, the ventral torso section 20 and the dorsal torso section 30 each stretch in the left-right direction, fitting the wearer's waist. Examples of stretchable members 23 and 33 include elastic materials such as rubber and spandex.

[0058] The fastening portion 5 is a so-called tab (pinch) member, and is used to form a waist opening when the ventral waist portion 20 is cut. Figure 4 is an enlarged view of portion X in Figure 3. In this embodiment, the base end of the fastening portion 5 (one side in the left-right direction in Figure 3, etc.) is fixed to one side of the center in the left-right direction of the ventral waist portion 20, and the tip end (the other side in the left-right direction in Figure 3, etc.) has an engaging portion 51 that detachably engages with the non-skin side of the ventral waist portion 20.

[0059] The fastening portion 5 is a pinch portion that is grasped and operated by the wearer or the person who is putting the diaper 1 on the wearer (hereinafter also referred to as "wearer, etc."), so it is preferable that the fastening portion 5 itself has sufficient strength to prevent breakage. As the fastening portion 5, for example, various films such as plastic film and nylon film, nonwoven fabric, and nonwoven fabric laminated film can be used. In this embodiment, the fastening portion 5 of the diaper 1 uses a sheet-like member consisting of three layers, with nonwoven fabric of the same size layered on both sides of a plastic film.

[0060] The engaging portion 51 is provided on the skin-facing side of the fastening portion 5 and is a member that can be detachably engaged with the non-skin-facing side (specifically, the engaged portion 25) of the ventral girth portion 20. Examples of the engaging portion 51 include the male member of a hook-and-loop fastener or an adhesive material such as an adhesive sheet. In this embodiment, the engaging portion 51 is substantially rectangular in shape, but it may be any shape such as round.

[0061] As shown in Figure 4, the fastening portion 5 is fixed to the ventral girth portion 20 by a fixing portion F1 and an auxiliary fixing portion F2. In this embodiment, the fixing portion F1 and the auxiliary fixing portion F2 are welded portions that join the fastening portion 5 and the ventral girth portion 20 in the thickness direction by heat welding, ultrasonic welding, or the like. The fastening portion 5 is mainly fixed to the ventral girth portion 20 by the fixing portion F1, and the auxiliary fixing portion F2 assists in the fixing by the fixing portion F1.

[0062] ===How to put on diaper 1=== Diaper 1 can be worn in multiple ways. For example, with a typical pant-type diaper (see Figure 1), the wearer's legs are inserted from the waist opening BH to the leg opening LH, and the waist sections 20 and 30 are pulled up to cover the wearer's waist to put it on.

[0063] Furthermore, as described above, after putting the diaper on as a pant-type disposable diaper, the abdominal waist portion 20 can be cut using the cutting guide portion (described later), and the engaging portion 51 of the fastening portion 5 can be engaged with the abdominal waist portion 20 to form a waist opening, thereby creating a worn state. This allows for adjustment of the engagement position of the engaging portion 51, making it easier to fit the wearer's waist.

[0064] Furthermore, by pre-cutting the ventral waist portion 20 with the cutting guide portion, it is possible to wear the diaper in a so-called tape-type diaper configuration (without a leg opening LH) on one side in the left-right direction, and in a pant-type diaper configuration (with a leg opening LH formed) on the other side in the left-right direction.

[0065] First, the ventral waist section 20 is cut by the cutting guide section, the wearer's other leg (the wearer's right leg in the case of diaper 1) is passed through the leg opening LH on the other side in the left-right direction (in the form of a pant-type diaper), and then diaper 1 is pulled up to the wearer's crotch. After that, the engaging section 51 of the fastening section 5 is engaged with the ventral waist section 20 to fit the wearer's waist, forming a waist opening and thus putting the diaper on.

[0066] By dressing the diaper in this way, even for infants who have difficulty putting both legs through the leg openings LH on both sides of the pant-type disposable diaper due to their flailing legs, if the wearer can put one leg through the leg opening LH, the diaper can then be easily put on by engaging it with the fastening part 5 (engaging part 51). Furthermore, when the wearer puts on the diaper 1 themselves, it may be difficult to put on a typical tape-type diaper (a diaper with tapes on both sides in the left-right direction) in the toilet, etc. However, by having one side in the left-right direction in a pant-type form and the other side in a form with fastening part 5 (tape type), it becomes easy to put on and easy to adjust the fit around the waist.

[0067] Furthermore, when removing the used diaper 1 from the body, the ventral waist portion 20 is separated by the cutting guide portion, one side of the diaper 1 in the left-right direction is removed from the wearer's body, and the other leg is pulled out through the leg opening LH on the other side in the left-right direction, thereby removing the diaper 1 from the wearer's body.

[0068] ===Regarding the cutting of the ventral girth section 20=== The cutting of the ventral girth portion 20 will be explained using Figures 5 and 6. Figure 5 is a diagram illustrating the separation of the ventral girth portion 20 and the formation of the girth opening. Figure 6 is a diagram illustrating the operation of cutting the ventral girth portion 20. Figure 5 is a diagram illustrating the cross-sectional configuration as seen from arrow A-A in Figure 4. Note that Figures 5 and 6 are schematic diagrams, and the dimensions are not necessarily accurate.

[0069] Figure 5A shows the diaper 1 in the pant-type state as shown in Figure 1, etc. That is, the ventral waist portion 20 is not cut, and the ventral waist portion 20 and the dorsal waist portion 30 form a continuous waist opening via the joint portions 2a and 2b. From the state shown in Figure 5A, the tip of the fastening portion 5 is grasped and pulled up toward the non-skin side, as shown in Figures 5B and 6A.

[0070] Then, as shown in Figure 6A, by grasping the waist portion 20 with one hand and the fastening portion 5 with the other hand and pulling them outward in the left and right directions, the ventral waist portion 20 is cut along the cutting guide portion, as shown in Figures 5C and 6B, separating into one side and the other side in the left and right directions. The "cutting guide portion" is a guide portion used when cutting at least a part of the ventral waist portion 20. In the diaper 1, the fixing portion F1 that fixes the ventral waist portion 20 and the fastening portion 5 functions as the cutting guide portion. Specifically, as shown in Figure 6A, when the ventral girth portion 20 and the fastening portion 5 are pulled in the left-right direction, the tensile force first concentrates at the cutting guide point K, which is the tip end of the cutting guide portion (fixing portion F1) located closest to the tip. Then, the force is transmitted along the inclined portion of the cutting guide portion that slopes upward and toward the base end from the cutting guide point K, and the inclined portion that slopes downward and toward the base end from the cutting guide point K. The ventral girth portion 20 is then cut at the other end CE in the left-right direction of the fixing portion F1, and the ventral girth portion 20 is separated into one part without the fastening portion 5 and the other part with the fastening portion 5.

[0071] Subsequently, as necessary, the waist opening of the diaper 1 is formed by engaging the engaging portion 51 of the fastening portion 5 with the engaged portion 25 of the ventral waist portion 20, as shown in Figure 5D. With the engaging portion 51 engaged with the engaged portion 25, the engaging portion 51 may be engaged with the engaged portion 25 so that one side of the separated ventral waist portion and the other side overlap in the front-to-back direction (thickness direction), or the engaging portion 51 may be engaged with the engaged portion 25 so that one side of the separated ventral waist portion and the other side do not overlap in the front-to-back direction (thickness direction). The size of the waist opening of the diaper 1 can be adjusted by adjusting the position in which the engaging portion 51 is engaged.

[0072] ===Regarding the fixed part F1=== Diaper 1 has a ventral waist portion 20 and a dorsal waist portion 30 joined at one end in the left-right direction by a joint portion 2a, and the base end of the fastening portion 5 is fixed to the ventral waist portion 20 by a fixing portion F1. The tip of the fastening portion 5 has an engaging portion 51 that detachably engages with the non-skin side of the ventral waist portion 20, and at least a part of the fixing portion F1 that fixes the fastening portion 5 and the ventral waist portion 20 is spaced apart from the joint portion 2a in the left-right direction.

[0073] As described above, the fastening portion 5 and the fixing portion F1 are parts to which force is applied when forming the girth opening, adjusting the size of the girth opening, or cutting the ventral girth portion 20. Therefore, by separating at least a part of the fixing portion F1 from the joint portion 2a, the risk of damaging or separating the joint between the ventral girth portion 20 and the dorsal girth portion 30 of the joint portion 2a due to the force applied to the fastening portion 5 and the fixing portion F1 caused by the movement of the fastening portion 5 can be reduced.

[0074] Even if a portion of the fixing portion F1 is separated from the joint portion 2a, and a portion of the fixing portion F1 overlaps with the joint portion 2a in the thickness direction (front-to-back direction), damage or peeling of the joint portion 2a due to the movement of the fastening portion 5 can be reduced. However, as shown in Figure 3, it is more preferable that the entire fixing portion F1 is separated from the joint portion 2a in the left-to-right direction. This further reduces the risk of damage or peeling of the joint portion 2a due to the movement of the fastening portion 5.

[0075] Furthermore, it is preferable that the diaper 1 has a cutting guide portion for cutting at least a part of the ventral waist portion 20, and it is preferable that the cutting guide portion is provided on the side other than the joint portion 2a in the left-right direction. By providing the cutting guide portion on the side other than the joint portion 2a provided on one side in the left-right direction, the risk of damage or peeling of the joint portion 2a due to the force applied when cutting the ventral waist portion 20 can be reduced.

[0076] Furthermore, it is preferable that the fastening portion 5 be located outside the central portion of the ventral girth portion 20, which is divided into three sections in the left-right direction. By positioning the fastening portion 5 close to the joint portions 2a and 2b, the risk of excessive force being applied to the joint portions 2a and 2b when cutting the ventral girth portion 20 can be reduced.

[0077] Furthermore, it is preferable that at least a portion of the fixing portion F1 is a cutting guide line. As described above, in this embodiment, the diaper 1 has a fixing portion F1 that functions as a cutting guide portion. Specifically, by applying outward force from both sides of the cutting guide portion in the left-right direction, the cutting of the ventral waist portion 20 is guided at the other end CE of the fixing portion F1 in the left-right direction, as shown in Figure 5. This makes it possible to create a diaper 1 that does not require the formation of a cutting guide portion by adding a new process such as forming perforations, while reducing the risk of damage or peeling of the joint portion 2a due to the force applied for cutting when the ventral waist portion 20 is cut. Note that a portion of the fixing portion F1 may be a cutting guide line, or the entire fixing portion F1 may be a cutting guide line.

[0078] As described above, the fastening portion 5 is fixed to the ventral girth portion 20 by the fixing portion F1, and the engaging portion 51 is detachably engaged with the non-skin side of the ventral girth portion 20. Regarding the fastening portion 5, it is preferable that, in the left-right direction, the fixing portion F1 is provided on the other side of the joining portion 2a, and the engaging portion 51 is provided on the other side of the fixing portion F1, and the fastening portion 5 has a non-fixed portion D on one side of the fixing portion F1 and on the other side of the joining portion 2a. The non-fixed portion D is a so-called dry edge portion that is not fixed to the ventral girth portion 20, and is a portion where no joining means such as adhesive or welding is provided. In Figures 4 and 7, the non-fixed portion D is shown as a diagonally downward-sloping shaded area. Figure 7 is an enlarged view of the ventral girth portion 20 in Figure 3.

[0079] As shown in Figure 4, the non-fixed portion D is provided between the fixed portion F1 and the joint portion 2a in the left-right direction. Since the portion between the fixed portion F1 and the joint portion 2a in the left-right direction is the part to which force is applied during the movement and engagement of the fastening portion 5, covering at least a part of this portion with the non-fixed portion D can reduce the risk of damage to the portion between the fixed portion F1 and the joint portion 2a.

[0080] As shown in Figures 4 and 7, the ventral girth portion 20 is equipped with an expandable member 23 that expands and contracts in the left-right direction, and comprises an expandable region S that expands and contracts in the left-right direction and a non-expandable region N that does not expand and contract in the left-right direction. The expandable region S of the ventral girth portion 20 refers to the expandable region of the expandable member 23. Specifically, in the left-right direction, the non-expandable region N is the central portion and the region from the central portion to one side end of the fastening portion 5. The expandable region S has a one-side expandable region Sa provided on one side and a other-side expandable region Sb provided on the other side in the left-right direction, with the one-side expandable region Sa being the region from the joint portion 2a on one side to one side end of the fastening portion 5, and the other-side expandable region Sb being the region from the joint portion 2b on the other side to the central portion.

[0081] Furthermore, when the fastening portion 5 is fixed to the ventral waist portion 20 by the fixing portion F1, and the engaging portion 51 is detachably engaged with the non-skin side of the ventral waist portion 20, it is preferable that there is a unilateral expandable region Sa that expands and contracts in the left-right direction between the joint portion 2a and the fixing portion F1 in the left-right direction. The area between the joint portion 2a and the fixing portion F1 in the left-right direction is a part that is easily subjected to force when the fastening portion 5 is moved, and is also a part that is easily damaged. Therefore, by providing a unilateral expandable region Sa that expands and contracts in the left-right direction between the joint portion 2a and the fixing portion F1 in the left-right direction, the expansion and contraction of the unilateral expandable region Sa can more easily buffer the force caused by the movement of the fastening portion 5, and the risk of damage to the part between the joint portion 2a and the fixing portion F1 can be reduced. It is even more preferable that the unilateral expandable region Sa be positioned adjacent to the other side of the joint portion 2a in the left-right direction. By having the unilateral expandable region Sa adjacent to the joint portion 2a, the force applied to the joint portion 2a can be more easily buffered, and damage or peeling of the joint portion 2a can be reduced.

[0082] Furthermore, when the fastening portion 5 is fixed to the ventral waist portion 20 by the fixing portion F1, and the engaging portion 51 is detachably engaged with the non-skin side of the ventral waist portion 20, it is preferable that there is a non-stretchable region Na on one side that does not stretch in the left-right direction between the joining portion 2a and the fixing portion F1. In Figures 4 and 7, the non-stretchable region Na on one side is shown by the hatched area of ​​the dots. In this embodiment, the non-stretchable region Na on one side is a part of the non-stretchable region N and is continuous with the non-stretchable region N. The non-stretchable region N is also a region that does not stretch in the left-right direction, located in the central part of the diaper 1 in the left-right direction. When the fastening portion 5 is moved, having a non-stretchable region Na on one side in the left-right direction between the joining portion 2a and the fixing portion F1 makes it easier to directly apply force to the fastening portion 5 to move it, and makes it easier to engage the fastening portion 5 and adjust the size of the waist opening by the fastening portion 5. Furthermore, it is more preferable to position the non-stretchable region Na on one side adjacent to the fixing portion F1 in the left-right direction. By positioning the non-stretchable region Na on one side adjacent to the fixing portion F1, it becomes easier to directly apply the force required to move the fastening portion 5 to the fastening portion 5.

[0083] Furthermore, as in diaper 1, it is more preferable that the one-sided stretchable region Sa (stretchable region) and one-sided non-stretchable region Na of the ventral waist portion 20 be provided such that the one-sided stretchable region Sa is adjacent to the other side of the joint portion 2a in the left-right direction, and the one-sided non-stretchable region Na is adjacent to the fixing portion F1 from one side. Specifically, as shown in Figure 4, the one-sided stretchable region Sa is adjacent to the joint portion 2a located on one side in the left-right direction from the other side in the left-right direction (left side in Figure 4). Also, the one-sided non-stretchable region Na is adjacent to the fixing portion F1 located on the other side of the joint portion 2a in the left-right direction from one side in the left-right direction (right side in Figure 4). This makes it easier to buffer the force caused by the movement of the fastening part 5 by the one-sided expandable region Sa adjacent to the joint 2a in the left-right direction, reducing the risk of damage to the part between the joint 2a and the fixed part F1. At the same time, it makes it easier to directly apply the force to move the fastening part 5 to the fastening part 5 by the one-sided non-expandable region Na adjacent to the fixed part F1 in the left-right direction, making it easier to engage the fastening part 5 and adjust the size of the opening around the body by the fastening part 5.

[0084] As shown in Figure 4, regarding the one-sided expandable region Sa and one-sided non-expandable region Na provided between the joint 2a and the fixing portion F1 in the left-right direction of the ventral girth portion 20, it is more preferable that the length of the one-sided expandable region Sa in the left-right direction is longer than the length of the one-sided non-expandable region Na in the left-right direction. This makes it easier to directly apply the force to move the fastening portion 5 to the fastening portion 5, while also making it easier to buffer the force applied to the joint 2a when the fastening portion 5 is moved, thereby reducing damage or peeling of the joint 2a.

[0085] Furthermore, as described above, in the left-right direction, the fastening portion 5, in which the fixing portion F1 is provided on the other side of the joining portion 2a and the engaging portion 51 is provided on the other side of the fixing portion F1, has a non-fixing portion D on one side of the fixing portion F1 and on the other side of the joining portion 2a. As shown in Figure 4, etc., when the diaper 1 is viewed from the ventral waist portion 20 side in the front-rear direction, it is more preferable that there is an overlapping portion between the one-sided non-stretchable region Na and the non-fixing portion D. In cases like the diaper 1, where the one-sided stretchable region Sa and the one-sided non-stretchable region Na are adjacent in the left-right direction, it is known that the stretchable member 23 is cut to form the one-sided non-stretchable region Na. When viewed from the ventral waist portion 20 side, the tip of the cut stretchable member 23 may be in an area that overlaps with the one-sided non-stretchable region Na, but by having an overlapping portion between the one-sided non-stretchable region Na and the non-fixing portion D, the non-fixing portion D can easily cover the tip of the stretchable member 23, thereby improving the aesthetic appearance of the diaper 1.

[0086] As shown in Figures 3 and 7, the ventral girth portion 20 is provided with a ventral girth stretchable region by an expandable member 23 that expands in the left-right direction, and the dorsal girth portion 30 is provided with a dorsal girth stretchable region by an expandable member 33 that expands in the left-right direction. The ventral girth stretchable region is the region of the ventral girth portion 20 in which the expandable member 23 can expand and contract, and specifically refers to the stretchable region S (Sa, Sb) shown in Figure 7. The dorsal girth stretchable region refers to the region from one joint 2a to the other joint 2b in the left-right direction. For the ventral girth portion 20 and the dorsal girth portion 30, it is preferable that the force that stretches the ventral girth stretchable region per unit area by a predetermined distance is greater than the force that stretches the dorsal girth stretchable region per unit area by a predetermined distance.

[0087] The ventral waist section 20 is equipped with an expandable member 23, and the dorsal waist section 30 is equipped with an expandable member 33, which improves the fit around the wearer's waist. Furthermore, if the force that stretches the dorsal waist stretchable area per unit area is greater than the force that stretches the ventral waist stretchable area per unit area, then, for example, when attempting to put on the diaper 1 with the wearer lying on their back after cutting the ventral waist section 20 at the cutting guide section (end CE of the fixing section F1), the dorsal waist section 30 may contract excessively, pulling the fastening section 5 fixed to the ventral waist section 20 to the wearer's back, causing the fastening section 5 to slip under the wearer's buttocks, making it difficult to operate the fastening section 5. In contrast, by making the force that stretches the ventral torso stretchable area per unit area greater than the force that stretches the dorsal torso stretchable area per unit area, the risk of the dorsal torso portion 30 contracting excessively is reduced, the risk of the fastening portion 5 being positioned on the wearer's back when worn is reduced, and the operability of the fastening portion 5 is improved.

[0088] A comparison of the force required to stretch the ventral waist circumference per unit area and the force required to stretch the dorsal waist circumference per unit area can be performed using a well-known method, for example, as follows: First, the stretchable area S of the ventral waist circumference 20 is cut out from the diaper 1 and cut to a predetermined size (unit area) to make test piece A. Similarly, the stretchable area of ​​the dorsal waist circumference 30 is cut out and cut to the same size as test piece A to make test piece B. For these test pieces A and B, the length in the relaxed state (e.g., 25 mm) in the left-right direction is used as the measurement section and is clamped in the chucks of a tensile tester (Instron). Then, the measurement section is stretched to a predetermined length (e.g., 50 mm) on both sides in the left-right direction at a predetermined speed (e.g., 100 mm / min), and then contracted at a speed of 100 mm / min until the distance between the chucks returns to the original length (25 mm). This cycle is repeated multiple times (for example, twice), and in the later cycles, the tensile load when the specimens are stretched to a predetermined length is measured to calculate and compare the stretching forces of specimens A and B. If the stretchable range of the specimens is narrow and they cannot be stretched to the predetermined length, the predetermined length of the measurement section during stretching can be shortened (for example, from 50 mm to 40 mm).

[0089] When viewing the diaper 1 from the ventral waist portion 20 side, it is preferable that the stretchable member 23 has a portion that overlaps with the leg stretchable member 17 provided on the absorbent body 10 on the other side in the left-right direction of the ventral waist portion 20. Regardless of the cutting of the ventral waist portion 20, it is possible to easily link the stretchability of the stretchable member 23, which stretches in the left-right direction, and the leg stretchable member 17, which stretches in the up-down direction, on the other side in the left-right direction.

[0090] Furthermore, it is preferable that the force required to separate the fixing portion F1 is greater than or equal to the force required to separate the joint portion 2a. This reduces the risk of the joint portion 2a peeling off due to the movement of the fastening portion 5, while further reducing the risk of the fixing portion F1 separating due to the movement of the fastening portion 5. The force required to separate the fixing portion F1 and the force required to separate the joint portion 2a can be measured, for example, using a tensile testing machine (for example, an Instron tensile testing machine).

[0091] As shown in Figure 2, when viewing the diaper 1 in its natural state from the ventral waist portion 20 side in the front-to-back direction, it is preferable that the vertical length T5 of the fastening portion 5 is longer than the vertical length T20 of the ventral waist portion 20. In this embodiment, the vertical length (T5) of the base end of the fastening portion 5 is longer than the vertical length (T20) of the substantially rectangular ventral waist portion 20. Since the fastening portion 5 is the part that performs the engagement operation, it is preferable to use one that has higher rigidity than the ventral waist portion 20.

[0092] In the natural state of the diaper 1, the portion of the fastening part 5 whose vertical length is longer than the vertical length of the ventral waist circumference portion 20 (the base end of the fastening part 5) is an easy-to-grasp portion, and the fastening part 5 that is grasped has higher rigidity than the ventral waist circumference portion 20, making it easier to reduce damage and peeling compared to when the ventral waist circumference portion 20 or the joint portion 2 is grasped.

[0093] Furthermore, at least a portion of the fixing portion F1 is a cutting guide portion, and the fastening portion 5 includes a fixing means region J provided with fixing means for forming the fixing portion F1, and it is preferable that the vertical length TJ of the fixing means region J is longer than the vertical length T2 of the joint portion 2a (TJ>T2). Since the vertical length of the joint portion 2a is approximately the same as the vertical length of the ventral girth portion 20 to be cut, by making the vertical length TJ of the fixing means region J longer than the vertical length of the ventral girth portion 20, it becomes easier to cut the ventral girth portion 20 from the upper end to the lower end when cutting the ventral girth portion 20 with the cutting guide portion (end CE of the fixing portion F1) as the boundary, and it becomes easier to completely separate it.

[0094] In this embodiment, the fixing portion F1 of the diaper 1 is a welded portion formed by welding the ventral waist portion 20 and the fastening portion 5 together, and the fixing means region J provided on the fastening portion 5 is a molten portion where the fastening portion 5 has melted. As shown in Figure 4, when viewed from the ventral waist portion 20 side, the fixing means region J, where it overlaps with the ventral waist portion 20, forms the fixing portion F1, but the portion J1 above the ventral waist portion 20 and the portion J2 below the ventral waist portion are not fixed to the ventral waist portion 20, and only the fastening portion 5 has melted in those portions. The fixing portion F1 and the upper portion J1 are continuous, and the fixing portion F1 and the lower portion J2 are continuous. Therefore, since the section J1, the fixing section F1 which functions as a cutting guide, and the section J2 are continuous from top to bottom, it is easy to cut the ventral girth section 20 from the upper end to the lower end when cutting the ventral girth section 20 with the cutting guide (end CE of fixing section F1) as the boundary.

[0095] Diapers 1 are generally distributed in a packaged state in which one or more diapers 1 are contained in a package (not shown). In the packaged state, the diaper 1 is compressed in the front-to-back direction compared to the natural state diaper 1 shown in Figure 2, and is thinner than the natural state diaper 1. However, the state of the packaged diaper 1 when viewed from the ventral waist area 20 side in the front-to-back direction is approximately the same as the state of the natural state diaper 1 when viewed from the ventral waist area 20 side in the front-to-back direction. Therefore, the packaged diaper 1 will be explained using Figure 2.

[0096] Conventional diapers have joints at both ends in the left-right direction, so there was a risk that the joints at both ends could be damaged or detached if the wearer or others grabbed the side ends of the diaper to remove it from the packaging.

[0097] In contrast, when the diaper 1 is contained in its packaging, the fastening portion 5 provided on the ventral waist portion 20 is folded back from the rear to the front in the front-to-back direction on one side in the left-to-right direction. When viewing the diaper 1 from the ventral waist portion 20 side in the front-to-back direction, as shown in Figure 2, it is preferable that the base end of the fastening portion 5 is located at the rear of the diaper 1 and the tip of the fastening portion 5 is located at the very front of the diaper 1. In other words, in the contained state, the waist portions 20 and 30 of the diaper 1 are compressed in the thickness direction, and folded portions are formed at both ends of the waist opening in the left-to-right direction. On one side in the left-to-right direction, the fastening portion 5, which is folded back from the rear to the front, covers the outside of the folded portion of the waist opening (waist portions 20 and 30).

[0098] The fastening portion 5 is the part that performs the engagement operation, and therefore is usually more rigid than the waist portions 20 and 30. By providing a folded fastening portion 5 on one end of the diaper 1 in the left-right direction when it is in its stored state, when removing the diaper 1 from the packaging, it is possible to grab the fastening portion 5 instead of the joint portion 2a, thereby reducing the risk of the joint portion 2a being damaged or peeled off.

[0099] ===Other Examples=== While embodiments of the present invention have been described above, these embodiments are intended to facilitate understanding of the present invention and are not intended to limit its interpretation. Furthermore, the present invention can be modified or improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

[0100] In the above-described embodiment, the fastening portion 5 and the ventral waist portion 20 are fixed together with the fixing portion F1, and the engaging portion 51 is engaged with the non-skin side of the ventral waist portion 20. However, the embodiment is not limited to this. The fastening portion 5 and the ventral waist portion 20 may be fixed together with the fixing portion F1, and the engaging portion 51 may be engaged with the non-skin side of the dorsal waist portion 30. Alternatively, the fastening portion 5 and the dorsal waist portion 30 may be fixed together with the fixing portion F1, and the engaging portion 51 may be engaged with the non-skin side of the ventral waist portion 20 or the non-skin side of the dorsal waist portion 30.

[0101] In the above-described embodiment, the fastening portion 5 is provided on one side of the diaper 1 in the left-right direction, that is, on the wearer's left side, but it is not limited to this. The fastening portion 5 may also be provided on the other side of the diaper 1 in the left-right direction, that is, on the wearer's right side. For example, if the person putting on the diaper is right-handed, providing the fastening portion 5 on one side of the diaper 1 in the left-right direction (the wearer's left side) can improve the ease with which the person putting on the diaper can operate the fastening portion 5. Also, if the wearer puts on the diaper 1 themselves, and the wearer is right-handed, providing the fastening portion 5 on the other side of the diaper 1 in the left-right direction can improve the ease with which the wearer can operate the fastening portion 5.

[0102] Furthermore, in the above-described embodiment, a fastening portion 5 fixed with a fixing portion F1 spaced apart from the joint portion 2a is provided on one side of the diaper 1 in the left-right direction, and the other side in the left-right direction is configured such that the waist portions 20 and 30 are joined by the joint portion 2b, but no fastening portion 5 is provided. However, the embodiment is not limited to this. Alternatively, a fastening portion 5 fixed with a fixing portion F1 spaced apart from the joint portion 2a may be provided on one side of the diaper 1 in the left-right direction, and a fastening portion fixed with a fixing portion spaced apart from the joint portion 2b may also be provided on the other side in the left-right direction, or a so-called fastening tape may be provided on either the waist portions 20 and 30 without the joint portion 2b on the other side in the left-right direction.

[0103] In the above embodiment, the fixing part F1 that fixes the ventral waist portion 20 and the fastening part 5 is used as a cutting guide, but it is not limited to this. Instead of using the fixing part F1 as a cutting guide, a cutting guide that can guide the cutting of the ventral waist portion 20 may be provided, such as by providing perforations or a low-weight portion with a thin base. If the cutting guide is provided at a different position from the fixing part F1, it is preferable to provide the cutting guide on the tip side of the fastening part 5 rather than the fixing part F1. Furthermore, the diaper 1 does not necessarily have to have a cutting guide. The wearer or the like may cut the ventral waist portion 20 at a desired position with a blade or by hand.

[0104] In the above-described embodiment, a diaper was illustrated in which the ventral waist portion 20 and the dorsal waist portion 30 are separate components. However, a crotch area may be provided between the ventral waist portion 20 and the dorsal waist portion 30, and the ventral waist portion 20 and the dorsal waist portion 30 may be a single continuous component. [Explanation of symbols]

[0105] 1. Diapers (disposable diapers, absorbent items), 2a, 2b joint, 5 Fastening part, 10 Absorbent body, 11 Absorbent material, 11A Absorbent core, 12 Top seat, 13 Second seat, 14 Side seat, 15 back seats, 16 exterior seats, 17 Leg extension members, 18 Leak-proof wall extension members, 20. Ventral girth area (one side of the girth), 21 Skin-side sheet, 22 Non-skin-side sheet, 23 Elastic member, 25 Engaged portion, 30. Dorsal girth area (other girth area), 31 Skin-facing sheet, 32 Non-skin-facing sheet, 33 Elastic member, 51 Engaging part, BH (body opening), LH (leg opening), F1 fixed part, F2 auxiliary fixed part, K cutting induction origin, S stretch area, Sa One side elastic area (elastic area), Sb Other side elastic area, N non-stretchable region, Na Non-stretchable area on one side (Non-stretchable area)

Claims

1. It has mutually orthogonal vertical, horizontal, and front-to-back directions, An absorbent article having a waist section comprising one waist section, the other waist section, and a crotch section, At least one end of the one side of the body circumference and the other side of the body circumference in the left-right direction are joined at a joint. Having a fastening part, The base end of the fastening portion is fixed to the body part by the fixing portion. The tip of the fastening portion has an engaging portion that detachably engages with the non-skin side of the torso portion, In the left-right direction, at least a portion of the fixed portion is spaced apart from the joint portion. The fastening portion is a single member, The torso portion has a cutting guide portion for guiding the cutting of at least a part of the torso portion, In the left-right direction, the cutting guide portion is provided on the other side of the joint portion. In its natural state, when the absorbent article is viewed from one side of the torso in the front-rear direction, The length of the fastening portion in the vertical direction is longer than the length of the one-sided waist portion, The fastening portion is fixed to the one side of the torso by the fixing portion. The engaging portion is detachably engaged with the non-skin side of the one-sided torso portion, The aforementioned one-sided torso portion has, in the left-right direction, an expandable region that expands and contracts in the left-right direction and a non-expandable region that does not expand or contract in the left-right direction, between the joint portion and the fixing portion. An absorbent article characterized in that, in the left-right direction, the expandable region is adjacent to the joint from the other side, and the non-expandable region is adjacent to the fixed portion from the one side.

2. The absorbent article according to claim 1, An absorbent article characterized in that, in the left-right direction, all of the fixing portions are spaced apart from the joint portions.

3. An absorbent article according to claim 1 or 2, An absorbent article characterized in that at least a portion of the fixing portion also serves as a cutting guide portion when cutting at least a portion of the torso portion.

4. An absorbent article according to any one of claims 1 to 3, In the state in which the absorbent article is contained in the packaging, The fastening portion is folded back on one side in the left-right direction, from the rear in the front-rear direction towards the front in the front-rear direction. An absorbent article characterized in that, when viewed from one side of the torso in the front-rear direction, the base end of the fastening portion is located at the rearmost side of the absorbent article, and the tip of the fastening portion is located at the frontmost side of the absorbent article.

5. An absorbent article according to any one of claims 1 to 4, In the left-right direction, The fixing portion is provided on the other side of the joint portion. The engagement portion is provided on the other side of the fixing portion, The fastening portion is characterized by having an unfixed portion that is provided on one side of the fixed portion and on the other side of the joint portion, and is not fixed to the one side of the waist circumference of the absorbent article.

6. An absorbent article according to any one of claims 1 to 5, At least a portion of the fixing portion also serves as a cutting guide portion when cutting at least a portion of the torso portion, The fastening portion includes a fixing means region where fixing means for forming the fixed portion are provided, An absorbent article characterized in that the vertical length of the fixing means region is longer than the vertical length of the joint portion.

7. An absorbent article according to any one of claims 1 to 6, An absorbent article characterized in that the force required to separate the fixed portion is greater than or equal to the force required to separate the joint portion.

8. An absorbent article according to any one of claims 1 to 7, An absorbent article characterized in that the length of the stretchable region in the left-right direction is longer than the length of the non-stretchable region in the left-right direction.

9. An absorbent article according to any one of claims 1 to 8, In the left-right direction, The fixing portion is provided on the other side of the joint portion. The engagement portion is provided on the other side of the fixing portion, The fastening portion has a non-fixed portion that is not fixed to the one-sided body circumference, which is provided on one side of the fixed portion and on the other side of the joint portion. An absorbent article characterized in that, when viewed from one side of the waist circumference in the front-rear direction, the non-stretchable region and the non-fixed portion overlap.

10. An absorbent article according to any one of claims 1 to 9, The other side of the torso includes the other side torso expansion and contraction region that expands and contracts in the left-right direction, In the left-right direction, The force that extends the aforementioned expansion / contraction region per unit area by a predetermined distance is An absorbent article characterized by having a force greater than that which extends the other side of the waist circumference expansion region per unit area by a predetermined distance.

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