Belt-type disposable diaper

Abstract

In a belt-type disposable diaper having a pair of connecting belts above and below a perforation line, the starting point of the perforation line is easily recognized. The above problem is solved by a belt-type disposable diaper in which, when a side edge of a connecting belt (5) extending in the width direction (WD) in both side portions of the back side portion (B) is divided into three in the front-rear direction (LD) between a connecting portion (5c) of a waist side flap (51) and a connecting portion (5c) of a leg band side flap (52), and a portion on the waist side is set as a first edge (21), a portion on the leg band side is set as a second edge (22), and a portion therebetween is set as a third edge (23), at least a portion of the third edge (23) has a recessed portion (11) recessed toward the base end side more than the first edge (21) and the second edge (22). The user will notice the recessed portion (11), thereby recognizing the perforation line (10) extending toward the base end side from the recessed portion (11), and thus will cut off the perforation line (10) when worn.

Description

TECHNICAL FIELD

[0001] The present application relates to a belt-type disposable diaper. BACKGROUND

[0002] A general belt-type disposable diaper has a structure in which an abdominal side portion extending from a central portion in a front-and-rear direction to a front side and a back side portion extending from the central portion to a rear side in the front-and-rear direction are provided, and a connecting protrusion protruding from both side portions of the back side portion is provided, and the connecting protrusion is wrapped around an outer surface of the abdominal side portion from both sides of a waist and connected to the outer surface of the abdominal side portion when worn on a body.

[0003] Such a belt-type disposable diaper is widely used not only for infants and young children but also for nursing use (adult use), but has a problem in that a waist circumference and a leg circumference are easily loosened.

[0004] Therefore, a so-called cross-fastening in which a connecting protrusion is provided at an end portion on a waist side and an end portion on a leg circumference side in each of the side portions of the back side portion, the connecting protrusions on the waist side and the leg circumference side are crossed, the waist circumference is fastened firmly by connecting the connecting protrusions on the waist side while being stretched obliquely downward, and the leg circumference is fastened firmly by connecting the connecting protrusions on the leg circumference side while being stretched obliquely upward has been conventionally recommended.

[0005] As a scheme capable of achieving the same wearing method, a scheme in which an end side of a connecting panel can be divided into two sections by a perforation line, and a user separates the perforation line to form a pair of connecting protrusions above and below (see Patent Literature 1) has been proposed.

[0006] In addition, a scheme of a two-strand structure in which an end side of an integrated connecting panel is divided into two strands to form a pair of connecting protrusions above and below, in which the connecting protrusions are provided with pinch portions that can be easily peeled off (see Patent Literature 2) is also known. The above solutions are the same in that a pair of connecting protrusions above and below are provided.

[0007] However, the perforation line by which the end side of the connecting panel is divided into two sections is difficult to be seen, and when used by a wearer who is not familiar with it, the connecting panel is sometimes connected to the outer surface of the abdominal side as a unit without being divided by the perforation line, and cross-fastening is not performed. In the case where installation is performed without cross-fastening, there are problems in that fit is decreased, leakage occurs, or the possibility of feeling discomfort is increased.

[0008] PRIOR ART DOCUMENTS

[0009] PATENT LITERATURE

[0010] Patent Literature 1: Japanese Patent No. 6087081

[0011] Patent Literature 2: Japanese Patent No. 6440471 SUMMARY

[0012] PROBLEMS TO BE SOLVED BY THE INVENTION

[0013] Therefore, the main object of the present application is to make the user easily notice the perforation line or the like present on the connecting belt.

[0014] MEANS FOR SOLVING THE PROBLEMS

[0015] The belt-type disposable diaper that solves the above problems is described below.

[0016] <1st Mode>

[0017] A belt-type disposable diaper has a crotch portion including a center in a front-rear direction, and a belly side portion and a back side portion that respectively extend from the center in the front-rear direction to a front side and a rear side,

[0018] Each side portion of the back side portion has a connecting belt that extends in a width direction,

[0019] The connecting belt has a waist side flap and a leg circumference side flap,

[0020] The waist side flap and the leg circumference side flap have a base end side portion that is integrated with each other via a perforation line that extends in the width direction, and a tip end side portion that is separated from each other in the front-rear direction,

[0021] A connecting portion is provided in the tip end side portion of the waist side flap and the tip end side portion of the leg circumference side flap, and has a hook member or an adhesive layer that is connected to the belly side portion in a detachable manner,

[0022] characterized in that

[0023] When a portion of a side edge of the connecting belt, which is located between the connecting portion of the waist side flap and the connecting portion of the leg circumference side flap, is trisected in the front-rear direction into a first edge located on the waist side, a second edge located on the leg circumference side, and a third edge located between the first edge and the second edge, a recessed portion that is recessed toward the base end side more than the first edge and the second edge is provided in at least a portion of the third edge,

[0024] An end of the perforation line is provided at a position on the most base end side of the recessed portion.

[0025] (EFFECTS)

[0026] In the fastening belt of the belt-type disposable diaper, a local recess is present in the side edge between the fastening portion of the waist side flap and the fastening portion of the leg band side flap, so the user easily notices the recess visually and easily recognizes the width direction perforation line continuous to the end of the recess. Further, if the end of the perforation line is present at the position on the most base end side of the recess, when the perforation line is to be cut off starting from the recess, the force to separate the perforation line is easily concentrated on the recess, so the cutting off can be easily started.

[0027] <2nd Mode>

[0028] The belt-type disposable diaper according to the 1st mode, wherein

[0029] In the fastening belt, at the fold line extending between the fastening portion and the recess and in the front-rear direction, the portion on the end side of the fold line is folded back on the portion on the base end side of the fold line, and joined together by the fastening portion.

[0030] (EFFECT)

[0031] For the reason of compactness of the product and the like, a technique of folding the fastening belt has been known conventionally. The present mode is characterized in that the fold line is disposed to pass between the fastening portion and the recess. Thereby, in the state where the fastening belt is folded, the waist side and the leg band side of the recess become straight lines along the front-rear direction, and in contrast, since the recess is present therebetween, the recess is particularly easily noticed. Further, the fact that the recess and the perforation line are easily noticed in the folded state of the fastening belt also contributes to the fact that the fastening belt is directly separated at the perforation line in the folded state, and for example, when the fastening portion is a hook member, the perforation line can be separated without the skin contacting the hook member, so the advantage that the skin surface is not easily damaged by the hook member is also obtained.

[0032] <3rd Mode>

[0033] The belt-type disposable diaper according to the 1st or 2nd mode, wherein the angle formed by the recess at the end of the perforation line and the width direction is 20 to 50 degrees

[0034] (EFFECT)

[0035] If the recess is formed at the end of the perforation line as the starting point of the cutting off at an acute angle, specifically, 20 to 50 degrees with respect to the width direction, the force to separate the perforation line is more easily concentrated on the end of the perforation line, so the cutting off can be easily started. Further, in the case where the recess is in a curved shape, the above "angle" refers to the angle formed by the tangent direction of the recess at the end of the perforation line and the width direction.

[0036] <4th Mode>

[0037] The belt-type disposable diaper according to any one of aspects 1 to 3, wherein

[0038] The attachment belt is linearly symmetrical about an imaginary line that passes through the center in the front-rear direction of the attachment belt and that extends in the width direction,

[0039] The waist side flap and the leg band side flap are each linearly symmetrical about an imaginary line that passes through the center in the respective front-rear direction and that extends in the width direction,

[0040] The attachment portion is continuous in the front-rear direction at a prescribed position in the middle of the width direction in the end side portion at a prescribed width,

[0041] The end side portion has a pinch portion that does not have the attachment portion at a position that is more toward the end than the attachment portion,

[0042] The portion of the side edge of the attachment belt that is between the attachment portion of the waist side flap and the attachment portion of the leg band side flap has a portion in the middle of the width direction that has a separation distance in the front-rear direction that is longer than the separation distance in the front-rear direction of the portions on either side.

[0043] (EFFECTS)

[0044] As a manufacturing method for the attachment belt, the following steps are widely performed: a single continuous belt-shaped hook member is attached in the center in the width direction of a substrate such as a nonwoven fabric, or an adhesive is continuously applied in a prescribed width, and then, in a wavy pattern along the side edge of the attachment belt, it is divided into two portions in the width direction, and then, in the continuous direction, it is cut at intervals of one attachment belt, thereby manufacturing left and right attachment belts without generating waste (hereinafter, also referred to as a no-waste manufacturing method). In the case where the aforementioned recess is formed using such a no-waste manufacturing method, depending on the shape of the portion of the side edge of the attachment belt that is between the attachment portion of the waist side flap and the attachment portion of the leg band side flap, there is a concern that the size of the pinch portion becomes small and it becomes difficult to pinch, but if it is the shape of the present aspect, the size of the pinch portion becomes large, and the pinch portion is easily pinched.

[0045] <5th Aspect>

[0046] The belt-type disposable diaper according to any one of aspects 1 to 3, wherein

[0047] The attachment belt is linearly symmetrical about an imaginary line that passes through the center in the front-rear direction of the attachment belt and that extends in the width direction,

[0048] The waist side flap and the leg band side flap are each linearly symmetrical about an imaginary line that passes through the center in the respective front-rear direction and that extends in the width direction,

[0049] The connecting portion is continuous in the front-to-back direction at a predetermined position in the middle of the width direction of the end portion.

[0050] The end portion has a gripping part that does not have the connecting part at a position closer to the end than the connecting part.

[0051] The portion of the side edge of the connecting strip located between the connecting portion of the waist-side wing and the connecting portion of the leg-side wing is composed of at least one of a curve with a radius of curvature of 30 or more and a straight line.

[0052] (Effects)

[0053] The connecting strip of this method is easy to manufacture. In addition, when the connecting strip of this method is manufactured using the above-described edgeless material manufacturing method, in contrast to the situation where the grip becomes smaller and difficult to hold, the grip is difficult to roll up when wearing, so there is less concern that the grip will become an obstacle or that the connecting part will be accidentally detached.

[0054] The effects of the invention

[0055] According to the present invention, advantages such as making it easy for users to notice the perforated wires present on the connecting strip are provided. Attached Figure Description

[0056] Figure 1 This is a top view showing the inner surface of a belt-type disposable diaper in its unfolded state.

[0057] Figure 2 This is a top view showing the outer surface of a belt-type disposable diaper in its unfolded state.

[0058] Figure 3 It is along Figure 1 A sectional view of line iii-iii in the diagram.

[0059] Figure 4 It is along Figure 1 A cross-sectional view of the iv-iv line.

[0060] Figure 5 It is a three-dimensional diagram showing the wearing status.

[0061] Figure 6 This is a top view of the connecting strip.

[0062] Figure 7 (a) is a top view of the connecting strap, and (b) is a top view of the connecting strap after it has been folded.

[0063] Figure 8 It is a top view of the connecting strip and an enlarged view of the area near the recess.

[0064] Figure 9is a plan view of the fastening tape and an enlarged view of the vicinity of the recess.

[0065] Figure 10 is a plan view of the fastening tape.

[0066] Figure 11 is a plan view of the fastening tape.

[0067] Figure 12 is a manufacturing view of the fastening tape. DETAILED DESCRIPTION

[0068] Hereinafter, one embodiment of the present application will be described in detail with reference to the drawings.

[0069] Figures 1 to 4 An example of a belt-type disposable diaper is shown, which has a crotch portion C including the center of a front-and-rear direction LD, and a front side portion F and a back side portion B each of which extends to the front side and the rear side, respectively, from the center of the front-and-rear direction LD of the crotch portion C, and which has a fastening tape 5 extending in a width direction WD on each side portion of the back side portion B. The disposable diaper has a basic structure in which an absorbent body 3 is sandwiched between an inner surface of a liquid-impermeable sheet 1 and a liquid-permeable top sheet 2.

[0070] (Absorbent Body)

[0071] As the absorbent body 3, an absorbent body made of a mass of pulp fibers, a collection of filaments such as cellulose acetate, or a nonwoven fabric, and mixed and fixed with a high-absorbency polymer as necessary, or the like, can be used. The absorbent body 3 can be wrapped with a crepe paper (not shown) as necessary. The shape of the absorbent body 3 can be appropriately determined to be a rectangular shape or the like in addition to the hourglass shape shown. As for the absorbent body 3, the unit area weight of the pulp is preferably about 100 to 500 g / m 2 about 1 to 15 mm in thickness. The unit area weight of the high-absorbency polymer is preferably about 0 to 300 g / m 2 about 1 to 15 mm in thickness. The unit area weight of the high-absorbency polymer is preferably about 0 to 300 g / m

[0072] (Liquid-Impermeable Sheet)

[0073] The liquid-impermeable sheet 1 extends outward from the periphery of the absorbent body 3 to block the movement of excreted matter absorbed by the absorbent body 3 to the back side. As the liquid-impermeable sheet 1, in addition to a plastic film such as a polyethylene film, a sheet material having moisture permeability without impairing water resistance can be used from the viewpoint of preventing stuffiness. The water-repellent / moisture-permeable sheet can use a micro-porous sheet obtained by, for example, melt-kneading an inorganic filler in a polyolefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. The weight per unit area of the liquid-impermeable sheet 1 is preferably about 13 to 40 g / m 2The thickness is preferably 0.01 to 0.1 mm.

[0074] In order to give the diaper an appearance and a skin touch like cloth to the outer surface, the back surface of the liquid-impermeable sheet 1 is entirely covered with the outer sheet 12, and the outer periphery of the two sheets 1, 12 reaches the outer periphery of the diaper. As the outer sheet 12, various nonwoven fabrics can be used, but a spunbond nonwoven fabric is preferable. The outer sheet 12 can also be omitted.

[0075] (Side barrier sheet)

[0076] As shown in Figs. 1 and 2, the side barrier sheet 4 is attached to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2) in the vicinity of the side edges of the article (in the illustrated example, the side edges of the top sheet 2) in the entire longitudinal direction. The side barrier sheet 4 can be formed of various nonwoven fabrics (preferably, spunbond nonwoven fabrics), plastic films, or laminated sheets of these materials, but in terms of the skin touch, a nonwoven fabric subjected to a water repellent treatment is preferable. The side barrier sheet 4 is fixed to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2) at both ends in the longitudinal direction by means of a hot melt adhesive or the like, but the intermediate portion between the both ends is a free portion 4f. At the end portion of the free portion 4f (the end portion on the widthwise central side in the unfolded state), an elongated elastic stretchable member 4G is fixed in a state of being elongated in the longitudinal direction LD by means of a hot melt adhesive or the like. The elongated elastic stretchable member 4G is provided with a plurality of members at a predetermined interval in the illustrated example, but can be a single member. As the elongated elastic stretchable member 4G (the same applies to the other elongated elastic stretchable members), natural rubber or synthetic rubber formed in a linear, string-like, or tape-like shape can be used, and specifically, styrene-based rubber, polyolefin-based rubber, polyurethane-based rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester, and the like can be used. As a result of the action of the contraction force of the elongated elastic stretchable member 4G, as shown in Fig. 2, the free portion 4f constitutes a side barrier that stands up with respect to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2). The base end 4b of the standing portion is located at the boundary between the fixed portion 4x on the widthwise outer side and the portion 4c on the inner side in the side barrier sheet 4. In addition, the side barrier sheet 4 is provided with a plurality of slits 4a in the longitudinal direction at a predetermined interval in the illustrated example, but can be provided with a single slit. Figure 3 Figure 4 As shown in Figs. 1 and 2, the side barrier sheet 4 is attached to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2) in the vicinity of the side edges of the article (in the illustrated example, the side edges of the top sheet 2) in the entire longitudinal direction. The side barrier sheet 4 can be formed of various nonwoven fabrics (preferably, spunbond nonwoven fabrics), plastic films, or laminated sheets of these materials, but in terms of the skin touch, a nonwoven fabric subjected to a water repellent treatment is preferable. The side barrier sheet 4 is fixed to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2) at both ends in the longitudinal direction by means of a hot melt adhesive or the like, but the intermediate portion between the both ends is a free portion 4f. At the end portion of the free portion 4f (the end portion on the widthwise central side in the unfolded state), an elongated elastic stretchable member 4G is fixed in a state of being elongated in the longitudinal direction LD by means of a hot melt adhesive or the like. The elongated elastic stretchable member 4G is provided with a plurality of members at a predetermined interval in the illustrated example, but can be a single member. As the elongated elastic stretchable member 4G (the same applies to the other elongated elastic stretchable members), natural rubber or synthetic rubber formed in a linear, string-like, or tape-like shape can be used, and specifically, styrene-based rubber, polyolefin-based rubber, polyurethane-based rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester, and the like can be used. As a result of the action of the contraction force of the elongated elastic stretchable member 4G, as shown in Fig. 2, the free portion 4f constitutes a side barrier that stands up with respect to the inner surface of the article (in the illustrated example, the front surface of the top sheet 2). The base end 4b of the standing portion is located at the boundary between the fixed portion 4x on the widthwise outer side and the portion 4c on the inner side in the side barrier sheet 4. In addition, the side barrier sheet 4 is provided with a plurality of slits 4a in the longitudinal direction at a predetermined interval in the illustrated example, but can be provided with a single slit. Figure 4 Figure 1 ​​The right oblique upper oblique portion in the drawing indicates a fixed portion of the side barrier 4. In addition, in the disposable diaper 100, the leg elastic member 14 extending along both side edges (the portions of the edges that become leg openings) Le is attached in a state of being elongated in the direction in which it extends in the front-and-rear direction LD. If the leg elastic member 14 extending along both side edges Le is provided, the side edges Le are pressed against the leg band, and leakage from the leg band is less likely to occur, and thus it is preferable. The number of leg elastic members 14 on each of the left and right sides can be appropriately determined.

[0077] (wing portions and the like)

[0078] At the front-and-rear direction ends of the disposable diaper 100, the liquid-impermeable sheet 1, the outer cover sheet 12, the top sheet 2, and the side barrier 4 each extend further than the front-and-rear ends of the absorbent body 3 to the front and rear, forming end wing portions EF in which the absorbent body 3 is not present. On the other hand, at the left-and-right side portions of the disposable diaper 100, the liquid-impermeable sheet 1, the outer cover sheet 12, the top sheet 2, and the side barrier 4 each extend further than the side edges of the absorbent body 3 to the sides, forming side wing portions in which the absorbent body 3 is not present. The portions of the side wing portions that are located at the waist side portions of the ventral portion F and the waist side portions of the dorsal portion B each extend further to the sides than the intermediate portion between them, and these portions become waist side side wing portions SF that become the waist band portions of the diaper.

[0079] In addition, the disposable diaper 100 has a crotch portion C that is defined in the front-and-rear direction LD as a range in which the both side edges (the portions of the edges that become leg openings) Le are in a narrowing curved shape along the leg band, and a ventral waist band portion TF and a dorsal waist band portion TB that are portions that extend to the front and rear of the crotch portion C, respectively, and whose both side edges are in a straight shape along the front-and-rear direction LD.

[0080] The joining tape 5 is attached with the side edges of the dorsal waist band portion TB protruding therefrom, and the target tape 6 is attached to the surface of the ventral waist band portion TF along the width direction WD. The joining tape 5 has a fixed portion 5f that is fixed between the sheets in the dorsal waist band portion TB by means of a hot melt adhesive or the like, and a main body portion 5e that protrudes to the outside in the width direction from between the sheets of the side edges of the dorsal waist band portion TB, and by cutting a punch line 10 provided in the middle in the front-and-rear direction of the main body portion 5e, it is possible to separate into a waist side wing sheet 51 and a leg band side wing sheet 52. In addition, the waist side wing sheet 51 and the leg band side wing sheet 52 are provided with a base end side portion 5g that is integrated with each other via the punch line 10, and a distal end side portion 5h that is separated from each other in the front-and-rear direction LD. In the vicinity of the base end of the punch line 10 in the joining tape 5, in order to prevent tearing further to the inside in the width direction beyond the base end, a C-shaped notch that disperses the momentum of separation of the punch line 10 can also be added.

[0081] As for the connecting belt 5, a nonwoven fabric (particularly, a sheet in which a plurality of nonwoven fabric layers are laminated, a laminated nonwoven fabric) having sufficient strength can be appropriately used as the base material 8.

[0082] A connecting portion 5c is provided on the inner surface of the waist side flap 51 and the leg band side flap 52, and has a hook member 9 which is attached to the outer surface of the belly side portion F in a detachable manner. In the illustrated mode, as for the connecting portion 5c, in addition to being provided at only one position on the end side portion 5h of the waist side flap 51 and the leg band side flap 52, respectively, it can also be provided at a plurality of positions spaced apart in the width direction WD. The hook member 9 preferably uses a male member of a mechanical fastener (face fastener) whose pin is hooked to a loop of the target tape 6 in a detachable manner, and in the case where a nonwoven fabric is used for the outer sheet 12, the fibers of the nonwoven fabric function as the loop, so the target tape 6 can also be omitted. The connecting portion 5c can also be formed by an adhesive layer, and in this case, as the target tape 6, a resin tape (sheet) having a smooth surface is preferably used.

[0083] As shown in Figure 6 As for the waist side flap 51 and the leg band side flap 52, their main body portions 5e can also have an elastic stretch portion which is elastically stretchable in the width direction WD. The method for forming the elastic stretch portion is not particularly limited, and for example, the connecting protrusion portion can be formed of a material which is elastically stretchable by itself, like an elastic stretch nonwoven fabric or a rubber sheet, but in the illustrated mode, at least a part of the width direction WD in the main body portion 5e of each flap 51, 52 is formed by joining a first sheet and a second sheet, and an elastic stretch member 20 is fixed between the first sheet and the second sheet, whereby the elastic stretch is performed. As the elastic stretch member 20, a sheet-shaped elastic stretch member can also be used in addition to an elongated elastic stretch member.

[0084] (recess)

[0085] As shown in Figure 7 (a), when the portion of the side edge of the connecting belt 5 which is located between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg band side flap 52 is divided into three in the front and back direction LD, and the portion located on the waist side is taken as a first edge 21, the portion located on the leg band side is taken as a second edge 22, and the portion located therebetween is taken as a third edge 23, at least a part of the third edge 23 has a recess 11 which is recessed toward the base end side more than the first edge 21 and the second edge 22, and if the perforation line 10 extends from the most base end side of the recess 11 toward the width direction center side of the diaper, the recess 11 functions to make the user aware of the presence of the perforation line 10 at the time of wearing, and is therefore preferable. When the user is aware of the perforation line 10 and cuts it off, the cut-off connecting belt 5 is divided into the waist side flap 51 and the leg band side flap 52, as shown in Figure 5As shown, they can be cross-fastened. Furthermore, when cutting off the perforation line 10, if the end of the perforation line 10 is present at the position of the most base end side of the recess 11, the force to separate the perforation line 10 is easily concentrated on the recess 11 when cutting off the perforation line 10 from the recess 11 as a starting point, and thus cutting off can be easily started.

[0086] More preferably, in the article state of (b), Figure 7 In the folded state of the attachment belt 5, the waist side and leg circumference side of the recess 11 become a straight line in the front-rear direction LD, and in contrast, the recess 11 is present therebetween, and thus the recess 11 becomes particularly conspicuous. In addition, the recess 11 and the perforation line 10 are easily noticed in the folded state of the attachment belt 5, and this also contributes to cutting off the attachment belt 5 by the perforation line 10 in the folded state, and for example, when the attachment portion 5c is the hook member 9, the perforation line 10 can be separated without the skin contacting the hook member, and thus the skin is also less likely to be damaged by the hook member 9.

[0087] When Figure 8 As shown, the angle a of the recess 11 at the end of the recess 11 with the width direction WD is an acute angle, and thus becomes a shape in which the force to cut off the perforation line 10 is easily concentrated on the base end side of the recess 11, and specifically, if the angle a is 20 to 50 degrees, cutting off from the perforation line 10 is easily started. In addition, as shown, Figure 9 As shown, in the case where the shape of the recess 11 is curved, the angle of the tangent line of the curve with the width direction WD is a. The shape and size of the recess 11 are not particularly limited, but preferably, the dimension (maximum value) 11L of the recess 11 in the front-rear direction LD is 15 to 25 mm, and the dimension (maximum value) 11W in the width direction WD is 5 to 15 mm. In addition, from the fact that the recess 11 provided at at least a portion of the third edge 23 is a portion that is recessed toward the base end side more than the first edge 21 and the second edge 22, the recess 11 refers only to the portion present at the third edge 23. That is, even if it appears to be a continuous recess from the first edge 21 to the second edge 22 as in the example shown in Figures 8 to 11 As shown, the dimension of the recess 11 is as shown in the drawing.

[0088] As shown in Figures 7 to 9 and Figure 11As shown, regarding the shape of the portion of the side edge of the connecting belt 5 between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg circumference side flap 52, in addition to the shape in which the separation distance in the front-rear direction LD becomes shorter (rather than expanding) toward the end of the perforation line, it can also be formed as a shape having a portion in which the separation distance in the front-rear direction LD becomes longer, as shown. Figure 10

[0089] The shape of the connecting belt 5 is preferably as shown in the illustrated example, a shape that is line-symmetrical with respect to an imaginary line that passes through the center in the front-rear direction of the connecting belt 5 and that extends in the width direction WD. In this case, the waist side flap 51 and the leg circumference side flap 52 are the same shape, and a portion on the imaginary line between the waist side flap 51 and the leg circumference side flap 52 and the position of the perforation line 10 are the same. Further, it is preferable that the waist side flap 51 also be a shape that is line-symmetrical with respect to an imaginary line that passes through the center in the front-rear direction thereof and that extends in the width direction WD, and the leg circumference side flap 52 also be the same shape. As shown, such a connecting belt 5 can be manufactured by the following method: pasting one continuous belt-shaped hook member 9 in the center in the width direction WD of a substrate 8 such as a nonwoven fabric in the front-rear direction LD, or continuously applying an adhesive in a prescribed width, and dividing into two portions in the width direction WD in a wavy pattern along the side edge of the connecting belt 5, and cutting in the continuous direction at intervals in the front-rear direction LD of the connecting belt 5 (trimless method). Figure 12

[0090] (Pinch hand portion)

[0091] In the end side portion 5h of the waist side flap 51 and the leg circumference side flap 52, it is preferable that a portion that is further toward the end side than the connecting portion 5c, in which the connecting portion 5c is not present, remain as a pinch hand portion 13.

[0092] ​​The shape and size of the pinch hand portion 13 are not limited, but the size 13L (the maximum value in the case of a change) of the pinch hand portion 13 in the front-rear direction LD is preferably 10 mm to 20 mm, and the size 13W (the minimum value in the case of a change) in the width direction WD is preferably 15 mm to 25 mm. The larger the pinch hand portion 13, the easier it is to pinch, and the more noticeable the recess portion 11, but since there is no connecting portion 5c in the pinch hand portion 13, the pinch hand portion 13 is likely to float up during use, and thus is likely to roll over. In contrast, the smaller the pinch hand portion 13, the more difficult it is to pinch, and the more difficult it is for the recess portion 11 to become noticeable, but it is difficult to float up, and thus it is difficult to roll over. In particular, in the case where the recess portion 11 is formed using the aforementioned edgeless manufacturing method, the shape of the portion of the side edge of the connecting belt 5 between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg circumference side flap 52 becomes the shape of the pinch hand portion 13, and thus depending on this shape, the size of the pinch hand portion 13 becomes small, and it can be difficult to pinch, or in contrast, it can be easy to roll over. For example, as shown in Figure 10 if the portion of the side edge of the connecting belt 5 between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg circumference side flap 52 has a separation distance 11L in the front-rear direction LD that is longer in the middle in the width direction WD than on both sides (for example, 1.2 to 1.5 times the maximum value of the separation distance in the front-rear direction LD of the portion between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg circumference side flap 52), then the pinch hand portion 13 is easy to pinch, but the likelihood of the pinch hand portion 13 floating up or rolling over during wear increases. On the other hand, as shown in Figure 11 if at least the portion (preferably the entire portion) of the side edge of the connecting belt 5 between the connecting portion 5c of the waist side flap 51 and the connecting portion 5c of the leg circumference side flap 52 is constituted only by at least one of a curved line having a radius of curvature of 30 or more and a straight line, then the pinch hand portion 13 becomes small, and it is difficult to handle during wear, but it is difficult to float up and roll over during wear, and in addition, it is easy to be cut in a wavy pattern when manufacturing the connecting belt 5, and in this regard, the manufacturing stability is excellent.

[0093] Industrial applicability

[0094] The present application can be utilized in a belt-type disposable diaper as in the above-described example.

[0095] Explanation of reference numerals

[0096] 1: liquid-impermeable sheet; 2: topsheet; 3: absorbent body; 4: side barrier sheet; 5: connecting belt; 5c: connecting portion; 5e: main body portion; 5f: fixing portion; 5g: base end side portion; 5h: distal end side portion; 51: waist side flap; 52: leg circumference side flap; 6: target belt; 7: fold line; 8: base material; 9: hook member; 10: perforated line; 11: recess; 11L: dimension of recess 11 in front-rear direction; 11W: dimension of recess 11 in width direction; 12: outer cover; 13: grip portion; 13L: dimension of grip portion 13 in front-rear direction; 13W: dimension of grip portion 13 in width direction; 14: leg circumference elastic stretchable member; 20: elastic stretchable member; 21: 1st edge; 22: 2nd edge; 23: 3rd edge; F: ventral portion; B: dorsal portion; 100: disposable diaper.

Claims

1. A belt-type disposable diaper having: a crotch portion including a center in a front-rear direction; and a belly side portion and a back side portion, which respectively extend from the center in the front-rear direction to a front side and a rear side, each side portion of the back side portion has a fastening belt extending in a width direction, the fastening belt has a waist side flap and a leg circumference side flap, the waist side flap and the leg circumference side flap have: base end side portions which are integrated with each other via a punch line extending through the center in the front-rear direction of the fastening belt and in the width direction; and tip side portions which are separated from each other in the front-rear direction, a fastening portion is provided in the tip side portion of the waist side flap and the tip side portion of the leg circumference side flap, the fastening portion having a hook member or an adhesive layer which is fastened to the belly side portion in a detachable manner, characterized in that the fastening belt is line-symmetrical about an imaginary line passing through the center in the front-rear direction of the fastening belt and extending in the width direction, the waist side flap and the leg circumference side flap are respectively line-symmetrical about an imaginary line passing through the center in the respective front-rear direction and extending in the width direction, the fastening portion is continuous in the front-rear direction at a prescribed position in the middle of the width direction in the tip side portion at a prescribed width, the tip side portion has a pinch portion which does not have the fastening portion at a position closer to the tip side than the fastening portion, a portion of a side edge of the fastening belt between the fastening portion of the waist side flap and the fastening portion of the leg circumference side flap has a shape which becomes the shape of the pinch portion, when a portion of the side edge of the fastening belt between the fastening portion of the waist side flap and the fastening portion of the leg circumference side flap is trisected in the front-rear direction into a first edge on the waist side, a second edge on the leg circumference side, and a third edge between the first edge and the second edge, at least a portion of the third edge has a recess which is recessed toward the base end side more than the first edge and the second edge, an end of the punch line is positioned at a position on the most base end side of the recess, an edge of the portion between the fastening portion of the waist side flap and the fastening portion of the leg circumference side flap has: a straight line portion along the front-rear direction which is continuous with the waist side of the recess; and a straight line portion along the front-rear direction which is continuous with the leg circumference side of the recess, the recess has a semicircular shape.

2. The belt-type disposable diaper according to claim 1, wherein with respect to the fastening belt, a portion closer to the tip side than a fold line extending between the fastening portion and the recess and in the front-rear direction is folded back onto a portion closer to the base end side than the fold line, and is joined together by the fastening portion.

3. The belt-type disposable diaper according to claim 1 or 2, wherein an angle which the recess at the end of the punch line makes with the width direction is 20 to 50 degrees.

4. The belt-type disposable diaper according to claim 1 or 2, wherein a portion of a side edge of the fastening belt between the fastening portion of the waist side flap and the fastening portion of the leg circumference side flap has a portion in the middle of the width direction which has a separation distance in the front-rear direction which is longer than separation distances in the front-rear direction of both sides of the portion.

5. The belt-type disposable diaper according to claim 1 or 2, wherein The portion of the side edge of the fastening belt between the fastening portion of the waist side flap and the fastening portion of the leg band side flap is constituted by a straight line.

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