JP6461505B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

  Conventionally, open-type disposable diapers have been widely used. In an open type disposable diaper, a fastening tape is provided on a side flap, and a target tape that is engaged with the fastening tape is provided on a front portion (also referred to as a ventral region or a front waistline portion). Such an open-type disposable diaper is widely used especially for newborns and infants because it can be easily worn even when the wearer is sleeping.

JP2013-212212A JP 2013-138702 A JP 2013-230256 A JP 2013-158573 A International Publication No. 2013/077360

  In an open-type disposable diaper, when removing a used diaper from a wearer's body, a tear line may be provided for removing the diaper by breaking the exterior of the diaper without removing the fastening tape. The tear line is composed of perforations with a plurality of holes aligned, and by breaking the diaper along the perforations, the stool excreted inside the diaper can be easily removed without leaking outside. become.

  On the other hand, when such a perforation is conspicuous, it gives the impression that the diaper has a hole or gives the impression that the strength of the diaper is weak. This may interfere with the use of diapers with peace of mind.

  This invention is made | formed in view of the above problems, The place made into the objective is to make the tear line provided in the disposable diaper inconspicuous.

The main invention for achieving the above object is:
Having a first waistline part, a crotch part, and a second waistline part in a longitudinal direction;
A side flap in which the first sheet member and the second sheet member are overlaid;
Fastening tape joined to the second waistline side of the side flap;
A cut line provided on the second waistline side of the side flap, in which a plurality of holes penetrating the first sheet member and the second sheet member are arranged;
A disposable diaper comprising:
The first sheet member has a plurality of hole edges corresponding to the plurality of holes, each hole edge being along the outer periphery of each hole,
The joint portion that joins the first sheet member and the second sheet member that are overlapped, and at least one hole edge portion among the plurality of hole edge portions do not overlap,
The fastening tape is configured to be detachable by breaking the side flap along the cut line.
This is a disposable diaper characterized by that.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, in a disposable diaper having a cut line, the cut line can be made inconspicuous.

It is an expanded top view of diaper 1. 2A to 2C are exploded explanatory views of each part of the diaper 1. FIG. FIG. 2A is an exploded explanatory view of the front portion 3. FIG. 2B is an exploded explanatory view of the crotch portion 5. FIG. 2C is an exploded explanatory view of the rear portion 7. It is a figure showing about the mode at the time of making a low weight child wear the diaper 1. FIG. It is a figure showing about the mode at the time of removing the diaper 1 from a wearer's body. 5A and 5B are diagrams illustrating the structure of the cut line 17 of the diaper 1. FIG. It is a figure which expands and represents the area | region of the rear part 7b of FIG. 5A. It is a figure represented about the BB cross section of FIG. 8A to 8B are diagrams illustrating examples of other patterns of the joint portion 50. It is a figure explaining the mode of the hole 17h when the force of a horizontal direction acts in FIG. It is a figure explaining the example in case the joining object area | region H and the hole edge part 17he overlap. 11A and 11B are diagrams illustrating an example in which the hole edge portion 17he and the joint portion 50 overlap between the first sheet member and the second sheet member.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
A side flap in which a first waistline portion, a crotch portion, and a second waistline portion are arranged in a longitudinal direction, and the first sheet member and the second sheet member are overlapped, and the second waistline of the side flap A fastening tape joined to a part side, and a cut line provided on the second waistline part side of the side flap and in which a plurality of holes penetrating the first sheet member and the second sheet member are arranged. In the disposable diaper provided, the first sheet member has a plurality of hole edges corresponding to the plurality of holes, and each hole edge extends along an outer periphery of each hole and is overlapped. A disposable diaper, characterized in that a joint part for joining the first sheet member and the second sheet member does not overlap with at least one hole edge part among the plurality of hole edge parts.

  According to such a disposable diaper, it becomes difficult to open a plurality of holes constituting the cut line, and it is difficult to visually recognize each hole, so that the cut line formed in the diaper can be made inconspicuous.

  Such a disposable diaper has a third sheet member that is overlapped with the first sheet member on a surface opposite to the second sheet member, and at least one of the plurality of hole edges. The hole edge portion does not overlap with a joint portion that joins the first sheet member and the second sheet member and a joint portion that joins the first sheet member and the third sheet member. desirable.

According to such a disposable diaper, in the cut line formed in the portion where the three sheet members are overlapped, the cut line is formed even when a force for pulling the sheet member in the lateral direction is applied. The spread of the hole becomes difficult to visually recognize. Thereby, a cut line can be made inconspicuous.

  Such a disposable diaper has a third sheet member that is overlapped with the first sheet member on a surface opposite to the second sheet member, and at least one of the plurality of hole edges. The hole edge portion overlaps with a joint portion that joins the first sheet member and the second sheet member, and does not overlap with a joint portion that joins the first sheet member and the third sheet member. Is desirable.

  According to such a disposable diaper, when a force for pulling the sheet member in the lateral direction is applied to the cut line formed at the portion where the three sheet members are overlapped, the second sheet member side is used. When viewed, the spread of the holes constituting the cut line is easily visible, and when viewed from the third sheet member side, the spread of the holes is difficult to visually recognize. This makes it possible to form a cut line that is difficult to see from one surface (outside) of the diaper and easy to see from the other surface (inside).

  In such a disposable diaper, it is desirable that at least one of the first sheet member and the third sheet member is formed of a nonwoven fabric.

  According to such a disposable diaper, since the outer edge (edge) of a hole can be made difficult to visually recognize with the fine fiber arrange | positioned on the surface of a nonwoven fabric, a cut line can be made more inconspicuous.

  In such a disposable diaper, it is desirable that the joining portion is formed by applying a hot melt adhesive in a spiral shape to at least one of the first sheet member and the second sheet member. .

  According to such a disposable diaper, it is possible to reduce the amount of the hot-melt adhesive that joins the sheet members, so that the cost can be reduced. In addition, since the basis weight of the hot melt adhesive applied to the sheet member is reduced, the sheet member is prevented from being hardened by the hot melt adhesive, and the touch of the diaper 1 can be kept soft. Furthermore, compared with the case where the hot melt adhesive is applied in a strip shape, the hole edge portion and the joint portion can be made difficult to overlap, so that the cut line can be made less noticeable.

  In such a disposable diaper, the ratio of the holes per unit length in the direction in which the tear line extends in the region corresponding to the region in which the fastening tape is disposed in the longitudinal direction is the length in the longitudinal direction. It is desirable that the ratio is smaller than the ratio of the holes per unit length in the direction in which the cut line extends in the area corresponding to the area where the fastening tape is not disposed.

  According to such a disposable diaper, even when the fastening tape is pulled in the lateral direction when the diaper is worn, the side flap is prevented from being accidentally cut off. Further, when the diaper 1 is undressed, the side flaps can be easily cut along the cut line.

  In such a disposable diaper, a plurality of waistline openings and a pair of leghole openings are formed by engaging the fastening tape with the first waistline part, and a plurality of parts included in the cut line. It is desirable that the holes are arranged on a route extending from a portion serving as the waistline opening to a portion serving as the leghole opening.

  According to such a disposable diaper, even if the diaper wearer is in a prone position (positioning position), the wearer can be cut off along the cut line to connect the fastening tape. The diaper can be removed without moving your body as much as possible.

  In such a disposable diaper, the cut line is a linear portion extending in the vertical direction from a portion serving as the waistline opening, and on the outer side in the horizontal direction at a position inside the vertical direction than the linear portion. It is desirable to have curved curved portions.

  According to such a disposable diaper, even if the leg is bent in an M-shape due to the wearer taking a positioning posture or the like, the portion of the fastening tape can be easily separated.

  This disposable diaper is provided on the first waistline side of the side flap and penetrates the first sheet member and the second sheet member at the same position as the cut line with respect to the lateral position. It is desirable to provide a cutting line in which a plurality of holes are arranged.

  According to such a disposable diaper, when the diaper is worn, the ventral side of the diaper can be broken along the cutting line. And the wearer's abdomen can be exposed with the diaper worn while turning over the broken part and turning it back. In particular, when the wearer is a low-weight child and needs to be treated with light, etc., light is applied to a wide area of the exposed abdomen while minimizing contact with the body of the low-weight child. Irradiation is possible.

=== Embodiment ===
<Basic configuration of disposable diaper 1>
The disposable diaper 1 of the present embodiment (hereinafter also simply referred to as diaper 1) is a disposable diaper mainly for newborns and infants, and is a low-weight infant having a weight of 3000 g or less, particularly a low birth weight of less than 2500 g. Suitable for weight children. Low-weight infants include not only low birth weight infants (weight less than 2500 g) but also extremely low birth weight infants (weight less than 1500 g) and very low birth weight infants (weight less than 1000 g).

  FIG. 1 is a developed plan view of the diaper 1. 2A to 2C are exploded explanatory views of each part of the diaper 1. FIG. FIG. 2A is an exploded explanatory view of the front portion 3. FIG. 2B is an exploded explanatory view of the crotch portion 5. FIG. 2C is an exploded explanatory view of the rear portion 7.

  The diaper 1 of the present embodiment is a so-called open-type disposable diaper, and has a first waistline portion 3, a crotch portion 5, and a second waistline portion 7, as shown in FIG. The 1st waist part 3 is a part which will be located in a wearer's front part (abdominal side, front waist area). Moreover, the 2nd waist part 7 is a part which will be located in a wearer's rear part (back side, back waist area). However, it is possible to wear the diaper 1 with the first waistline portion 3 on the back side of the wearer and the second waistline portion 7 on the stomach side of the wearer. In the following description, the “first waistline portion 3” is also referred to as “front portion 3” and the “second waistline portion 7” is also referred to as “rear portion 7” for convenience.

  Further, each direction is defined as shown in FIG. That is, the direction from the front part 3 to the rear part 7 is defined as “vertical direction”, and the direction orthogonal to the vertical direction is defined as “lateral direction”. The vertical direction is a direction along the product longitudinal direction, and the horizontal direction is a direction along the product width direction. Moreover, as shown in FIG. 2, the direction orthogonal to the vertical direction and the horizontal direction is “thickness direction”, the wearer's skin side is “skin side”, and the opposite side is “non-skin side”. .

  The diaper 1 has a center strip region 12, side flaps 14, and leg side gathers 16. A fastening tape 30 is attached to each of the pair of side flaps 14. By engaging the fastening tape with the first waistline portion, one waistline opening and a pair of leghole openings are formed.

  The central belt-like region 12 is a belt-like region located at the lateral central portion formed by the front part 3, the crotch part 5 and the rear part 7 (see FIG. 1). The central belt-like region 12 is a part that absorbs and holds liquid such as urine excreted by the wearer. The central strip region 12 has a vertically long shape (a shape along the vertical direction) including the liquid-retaining absorbent 21. The center strip region 12 mainly includes an absorbent body 21, a top sheet 22, a leak-proof sheet 23, and a back sheet 24 (see FIGS. 2A to 2C).

  The absorbent body 21 is a member formed by laminating a liquid absorbent material capable of absorbing excrement such as urine, and is disposed over the front part 3, the crotch part 5, and the rear part 7. The area displayed by the shaded portion in FIG. 1 indicates the area occupied by the absorber 21. The absorber 21 has an hourglass shape in which the width at the center in the vertical direction is narrowed. However, the shape of the absorber 21 is not limited to the shape shown in FIG. 1, and may be a simple rectangle. Moreover, the absorber 21 should just be provided in the crotch part 5 at least. The absorber 21 is disposed between the top sheet 22 and the leak-proof sheet 23. As a liquid absorptive material which constitutes absorber 21, liquid absorptive granular materials, such as liquid absorptive fibers, such as pulp fiber, and a superabsorbent polymer, for example, can be used. Moreover, liquid absorptive materials other than a liquid absorptive fiber and a liquid absorptive granular material may be included.

  CL shown in FIG. 1 is a line indicating the center of the diaper 1 in the vertical direction. In the diaper 1, the position of the crotch part 5 is set so that the center part of the wearer's crotch coincides with the center part of the crotch part 5. The center part of the wearer's crotch is the center position of the base of the leg, and is a position shifted to the front side from the center position CL of the diaper 1 in the longitudinal direction (see FIG. 1). Since the center part of the crotch part 5 is on the front side of the center position CL of the diaper 1, the wearer can easily move the leg to the front side (abdominal side), and the area of the rear part 7 of the diaper 1 is relatively It is possible to cover the wearer's buttocks firmly.

  The top sheet 22 is a liquid-permeable member disposed on the skin side of the absorbent body 21 and is made of, for example, a nonwoven fabric. The leak-proof sheet 23 is a liquid-impermeable member disposed on the non-skin side of the absorbent body 21 and is formed of, for example, a film sheet. A back sheet 24 is disposed on the non-skin side of the leak-proof sheet 23 (see FIGS. 2A to 2C). The back sheet 24 is a member (exterior sheet) that constitutes the exterior of the diaper 1 on the non-skin side, and is composed of, for example, a nonwoven fabric.

  The side flaps 14 are portions located on both lateral sides of the central strip region 12. The side flap 14 is formed over the front part 3, the crotch part 5, and the rear part 7 (refer FIG. 1). The lateral length (width) of the side flap 14 in the crotch part 5 is narrower than the lateral length (width) of the side flap 14 in the front part 3 and the rear part 7. Further, the lateral length (width) of the rear portion 7 of the side flap 14 is longer than the lateral length (width) of the front portion 3 of the side flap 14 (see FIG. 1). Leg gathers 15 (leg extension / contraction portions) that extend and contract along the vertical direction are respectively formed on both side ends of the pair of side flaps 14.

  The side flap 14 is mainly composed of a skin side sheet 26 and a back sheet 24 (see FIGS. 2A to 2C). The skin side sheet 26 is a skin side member formed over the front part 3, the crotch part 5 and the rear part 7, and is made of, for example, a nonwoven fabric. The skin side sheet 26 is also a member constituting the leg side gather 16 (three-dimensional gather), and a portion outside the skin side sheet 26 (a portion outside the joint portion 26 </ b> A indicated by a broken line in FIG. 1) has the side flap 14. Configure. The skin side sheet 26 and the back sheet 24 are joined to each other by a hot melt adhesive (hereinafter also referred to as “HMA”). Further, in a partial region of the side flap 14, a leak-proof sheet 23 is disposed so as to be sandwiched between the skin side sheet 26 and the back sheet 24 (see FIGS. 2A to 2C).

  An elastic member 27 is disposed between the skin side sheet 26 and the back sheet 24 of the side flap 14. The elastic member 27 is a thread-like member that expands and contracts along the vertical direction, and is a member that imparts stretchability to the leg opening when the diaper 1 is worn. That is, the elastic member 27 is a leg-hole elastic member that fits the leg retraction part of the diaper 1 according to the wearer's leg. The leg gathers 15 are formed by the elastic member 27 imparting stretchability to the skin side sheet 26 and the back sheet 24 of the crotch 5. In FIG. 1, two elastic members 27 are provided along the longitudinal direction of the pair of side flaps 14, but the number and arrangement of the elastic members 27 are not limited to this and can be adjusted as appropriate. The elastic member 27 is made of, for example, thread rubber.

  The leg side gathers 16 are three-dimensional gathers for preventing liquid leakage from leg gaps. The pair of leg side gathers 16 is formed along the vertical direction across the front portion 3, the crotch portion 5, and the rear portion 7 (see FIG. 1). The leg side gathers 16 are formed so as to cover both edges of the central strip region 12 inside the side flaps 14.

  The leg side gathers 16 are mainly configured from a portion inside the skin side sheet 26 (see FIG. 2). The inner edge of the skin side sheet 26 of the crotch part 5 is stretchable by rubber thread or the like. The skin-side sheet 26 is joined along the vertical direction at a joint portion 26A between the central belt-like region 12 and the side flap 14 (broken line portion in FIG. 1). A region inside the joint portion 26A of the skin side sheet 26 constitutes the leg side gather 16 (three-dimensional gather) with the joint portion 26A as a fulcrum.

  The fastening tape 30 is attached to the side flap 14 of the rear part 7 (see FIG. 1). The fastening tape 30 is joined by a part of the fastening tape 30 being sandwiched between the skin side sheet 26 and the back sheet 24 constituting the side flap 14 (see FIG. 2C).

  A target tape 29 is provided on the front part 3 of the diaper 1 (see FIG. 1). The target tape 29 is disposed on the non-skin side of the back sheet 24 of the front portion 3 (see FIG. 2A). The target tape 29 is a member that can be engaged with the fastening tape 30 and is formed of, for example, a nonwoven fabric. The target tape 29 constitutes a target area with which the fastening tape 30 is engaged. Instead of disposing the target tape 29 on the non-skin side of the back sheet 24, a target region may be formed on the outermost nonwoven fabric of the back sheet 24. The diaper 1 is worn by engaging the fastening tape 30 with the target tape 29.

  Further, on the rear portion 7 side of the side flap 14, that is, on the side where the fastening tape 30 of the side flap 14 is joined, a cut line 17 indicated by a thick dotted line in FIG. 1 is provided. Details of the cut line 17 will be described later.

  The product length in the vertical direction of the diaper 1 for low-weight infants of the present embodiment (dimensions in a state where the product is stretched in the lengthwise direction) is in the range of 210 to 330 mm. For example, the product length of a diaper 1 for a low birth weight infant with a weight of less than 2500 g is 310 mm, and the product length of a diaper 1 for an extremely low birth weight infant with a weight of less than 1500 g is 270 mm, and the weight is less than 1000 g. The product length of the diaper 1 for low birth weight infants is 230 mm.

  Moreover, the waist dimension of the diaper 1 for low weight infants of this embodiment is the range of 160-295 mm. The waist dimension is a dimension in a state in which the end of one fastening tape 30 is aligned with the end of the hook sheet region C of the other fastening tape 30 on the side flap 14 side and the product is stretched without any wrinkles. is there. That is, it is a dimension in a state where the product is extended in the width direction. For example, the waist dimension of the diaper 1 for a low birth weight infant is 273.5 mm, and the waist dimension of the diaper 1 for an extremely low birth weight infant less than 1500 g is 220 mm.

<Removal of diaper 1>
Next, a method for attaching and detaching the diaper 1 will be described. First, when the diaper 1 is to be worn by the wearer, the diaper 1 in a state where it is unfolded as shown in FIG. Arrange along the side. And the fastening tape 30 is engaged with the target tape 29 provided in the front part 3 so that the rear part 7 of the side flap 14 may be wound around the waist from the wearer's back side to the stomach side.

  FIG. 3 is a diagram illustrating a state when the diaper 1 is worn by a low-weight child. As described above, the diaper 1 of the present embodiment is mainly intended for a low-weight child. When the wearer is a low-weight baby, especially when the wearer is for extremely low birth weight infants (weight less than 1500 g) or very low birth weight infants (weight less than 1000 g), avoid touching the body as much as possible. Therefore, “minimum handling” is sometimes required to prevent stress. Therefore, after the diaper 1 is worn by a low-weight child, the wearer can keep the posture in which the back is curved in a C shape and the leg is strongly bent in an M shape as shown in FIG. It is desirable to keep the computer in a resting state. The posture shown in FIG. 3 is close to the posture of the fetus in the mother's body (fetal-like bending posture) and is easy to rest, and is also called a “positioning posture”.

  When removing the diaper 1 from the wearer's body, the fastening tape 30 that has been engaged with the target tape 29 is peeled off, and the diaper 1 is unfolded in the reverse order of wearing. However, when the wearer is in a positioning posture as shown in FIG. 3, the fastening tape 30 is hidden on the stomach side of the wearer. Therefore, in order to peel the fastening tape 30, the wearer's body must be in a supine position so that the abdomen of the wearer can be seen, but the wearer's body must be moved only to remove the diaper 1. Is not preferable from the viewpoint of “minimum handling”. Therefore, in the diaper 1, a cut line 17 is provided on the side flap 14 so that the diaper 1 can be removed without moving the wearer's body.

  Drawing 4 is a figure showing about a situation at the time of removing diaper 1 from a wearer's body. When removing the diaper 1, the side flap 14 is torn along the cut line 17 from the waistline opening to the leghole opening. Thereby, the diaper 1 can be removed from the wearer's body while the fastening tape 30 is engaged with the abdominal target tape 29. That is, as shown in FIG. 4, by disconnecting the portion where the fastening tape 30 is connected from the side flaps 14 at both lateral ends of the diaper 1, the diaper 1 is in an unfolded state, so that the wearer (low-weight infant The diaper 1 can be easily undressed without changing the posture of).

<Cut line structure>
The detailed structure of the cut line 17 provided in the diaper 1 will be described.

  5A and 5B are diagrams illustrating the structure of the cut line 17 of the diaper 1. FIG. The cut line 17 of the present embodiment is provided on the side flap 14 in the longitudinal rear 7 side, that is, on the side to which the fastening tape 30 is connected, and a plurality of holes 17h extend from the waistline opening to the leghole opening. It is a site formed in a perforated shape by being arranged on the route. Each of the plurality of holes 17h penetrates the skin-side sheet 26, the back sheet 24, and the leak-proof sheet 23 in the thickness direction that constitute the side flap 14 in the thickness direction. 5A shows an example in which the hole 17h is circular, and FIG. 5B shows an example in which the hole 17h is elliptical. The shape of the hole 17h may be other than this, for example, a rectangular slit or the like. The size of the hole 17h (the diameter of the opening) is determined according to the size of the diaper 1 and the material of the base material constituting the diaper such as the skin side sheet 26.

  5A and 5B, the region of the rear portion 7 in the longitudinal direction of the diaper 1 is divided into three regions, that is, a rear portion 7a, a rear portion 7b, and a rear portion 7c. The rear part 7b is an area provided at a position substantially corresponding to the position where the fastening tape 30 is arranged in the vertical direction, and the rear part 7a is an area on the rear side in the vertical direction (outside in the vertical direction) with respect to the rear part 7b. The rear portion 7c is a region on the front side in the vertical direction (inner side in the vertical direction) from the rear portion 7b. The plurality of holes 17h of the cut line 17 are linear portions arranged in a straight line in the vertical direction along the joint portion 26A between the central strip region 12 and the side flap 14 in the region of the rear portion 7a and the rear portion 7b. Form. Further, the plurality of holes 17h form a curved portion arranged in a region of the rear portion 7c so as to be curved toward the leg-hole opening side of the lateral outer end portion of the diaper 1. Thus, since the cut line 17 has a linear part and a curved part, the side flap 14 can be easily cut even in the state where the diaper 1 is worn. For example, when the wearer of the diaper 1 takes a positioning posture as shown in FIG. 3, the leg of the wearer is bent in an M shape and is located on the front side of the body. The part is also located on the front side. In this state, if the side flap 14 is to be broken from the waistline opening to the leg opening, it is necessary to cut it obliquely along the direction in which the leg is bent. On the other hand, in the diaper 1 of the present embodiment, the tear line 17 is curved toward the leg opening portion, so that the wearer takes a positioning posture by breaking the side flap 14 along the tear line 17. Even when it is removed, the portion of the fastening tape 30 can be easily cut off.

  Further, the interval (pitch) between the holes 17h adjacent to each other on the cut line 17 is different for each region. Specifically, the distance Lhb from the outer peripheral edge of a certain hole 17h in the region of the rear part 7b to the outer peripheral edge of the adjacent hole 17h is adjacent to the outer peripheral edge of the certain hole 17h in the region of the rear part 7a and the rear part 7c. It is wider than the distance Lha to the outer peripheral edge of the hole 17h (Lhb> Lha). In other words, the ratio of the holes 17h per unit length on the cut line 17 in the region of the rear portion 7b is larger than the ratio of the holes 17h per unit length on the cut line 17 in the region of the rear portion 7a and the rear portion 7c. small. That is, in the region of the rear portion 7b, since the ratio of the holes penetrating the skin side sheet 26 and the back sheet 24 is small, it is difficult to cut the side flap 14 compared to the regions of the rear portion 7a and the rear portion 7c. This is to prevent the lateral flap 14 from being cut off due to the laterally outer force acting on the region of the rear portion 7b when the fastening tape 30 is pulled in the lateral direction when the diaper 1 is worn. . Conversely, when the diaper 1 is undressed, it becomes easier to cut the side flaps 14 compared to the rear portion 7b in the rear portion 7a, which is the portion at which cutting starts, and the rear portion 7c where the cutting line 17 is curved. Yes. Thereby, when wearing the diaper 1, it is suppressed that the side flap 14 is cut off accidentally, and when removing the diaper 1, on the other hand, the side flap 14 is simply cut off along the cut line 17 Can do.

<Appearance of cut line>
The cut line 17 is disposed at a position where the wearer's flank is easily visible when the diaper 1 is worn. When the diaper 1 is worn, the side flap 14 is subjected to a force that is stretched in the lateral direction. Therefore, the lateral force also acts on the holes 17h constituting the cut line 17, and each hole 17 is likely to expand. It will be more noticeable in appearance. In particular, when the wearer is a low-weight infant and takes a positioning posture as shown in FIG. 3, a lateral force is applied to the engaging portion of the fastening tape 30 as compared with the supine posture. It becomes easy, and the hole 17h connected to the perforation may be excessively emphasized. If the hole 17h is excessively conspicuous, the user is given an impression that the diaper 1 has a hole, and there is anxiety that excrement may leak out of the diaper 1 from the hole 17h. There is a risk of causing. Moreover, it may be considered that the diaper 1 may be torn from the portion of the hole 17h, which hinders the use of the diaper 1 with peace of mind.

  With respect to such a problem, in the diaper 1 of the present embodiment, even if a lateral force acts on the side flap 14, the hole 17h of the cut line 17 is made inconspicuous.

  FIG. 6 is an enlarged view of the region of the rear portion 7b of FIG. 5A. FIG. 7 is a diagram illustrating the BB cross section of FIG. 6. 6 and 7, the hole 17 is represented as a circle having a diameter D1, but the shape of the hole may be other than a circle. Moreover, in FIG.6 and FIG.7, about the hole 17 formed in the skin side sheet | seat 26, the leak-proof sheet | seat 23, and the back sheet | seat 24, it is a hole edge part in the area | region which has the predetermined width along the outer periphery (outer edge part). 17he is set. The hole edge 17he is provided corresponding to each of the plurality of holes 17h constituting the cut line 17, and the distance w from the outer periphery of the hole 17 to the outer periphery of the hole edge 17he is, for example, 0.1 to 1.. It has a size of about 0 mm. In the following description, the leak-proof sheet 23 is a first sheet member, the skin-side sheet 26 is a second sheet member, and the back sheet 24 is a third sheet member.

  Between the first sheet member and the second sheet member, a joining target region H for joining both sheets is provided. 6 and 7 is a bonding target region H, and in this embodiment, band-shaped bonding target regions H along the vertical direction are provided in regions on both sides of the cut line 17 in the horizontal direction. Yes. Then, by applying an adhesive such as a hot melt adhesive (HMA) to a predetermined range in the joining target region H between the two sheet members stacked in the thickness direction, the two sheet members A joint 50 is formed to join the two together. Similarly, a joining target region H for joining both sheets is provided between the first sheet member and the third sheet member, and a joining portion 50 is formed in the joining target region H.

  In FIGS. 6 and 7, HMA is applied to the entire region to be joined H on at least one of the first sheet member and the second sheet member. That is, the joint portion 50 is formed in a substantially rectangular strip shape along the vertical direction within a range equivalent to the joining target region H. In this specification, such an HMA coating pattern is referred to as a “coater pattern”. In the coater pattern, two sheet members can be firmly bonded to each other, which is suitable when it is desired to ensure the bonding strength. However, the shape of the bonding portion 50 is not limited to the coater pattern, and the bonding portion 50 can be formed in various patterns other than the coater pattern by changing the HMA coating pattern within the bonding target region H. It is.

  8A to 8B are diagrams illustrating examples of other patterns of the joint portion 50. FIG. 8A shows an example in which HMA is spirally applied within the region H to be joined. In this specification, such a coating pattern is referred to as a “spiral pattern”. In the joint portion 50 formed by the spiral pattern, it is possible to reduce the amount of HMA used compared to the coater pattern. Moreover, since the basis weight of HMA in the joining target area H is reduced, the sheet is suppressed from being hardened by the HMA, and the touch of the diaper 1 in the joining target area H can be kept soft. FIG. 8B shows an example in which the HMA is applied so as to meander in the longitudinal direction within the range of the bonding target region H. In the present specification, such a coating pattern is referred to as an “omega pattern”. In the joint portion 50 formed by the omega pattern, the amount of HMA to be used can be reduced as in the spiral pattern, and the touch of the joining target region H can be softened.

  As shown in FIG. 7, in the diaper 1 of the present embodiment, the joint portion 50 and the hole edge portion 17he are formed at positions that do not overlap in the lateral direction. In other words, between the first sheet member (leak-proof sheet 23) and the second sheet member (skin-side sheet 26), and between the first sheet member (leak-proof sheet 23) and the third sheet member ( The hole edge 17he is not joined to the back sheet 24). Thereby, even if the side flap 14 is pulled in the lateral direction, the hole 17h of the cut line 17 can be made inconspicuous.

  FIG. 9 is a diagram for explaining a state of the hole 17h when a lateral force is applied in FIG. When a force pulling the side flaps 14 in the lateral direction is applied, as shown in FIG. 9, the first to third sheet members are displaced in the shearing direction. At the same time, a force acts in the direction of expanding the diameter of the opening with respect to the hole 17h formed in each sheet member, and the diameter of the hole 17h represented by D1 in FIG. 7 expands to D2 in FIG. 9 (D2> D1). ).

  Here, the hole edge 17he provided around the hole 17h of the first sheet member and the hole edge 17he provided around the hole 17h of the second sheet member are not joined to each other. In the two sheet members, the lateral positions of the holes 17h are shifted from each other. Similarly, the lateral direction positions of the holes 17h are shifted from each other between the first sheet member and the third sheet member. As a result, the diameter D3 of the region penetrating from the first sheet member to the third sheet member in the thickness direction in the hole 17h is narrower than D2 (D2> D3). Therefore, even if the diameter of the hole 17h is expanded to D2 by the side flap 14 being pulled in the lateral direction, the size of the diameter of the portion actually seen through is D3, and the hole 17h is not expanded in appearance. looks like. FIG. 9 shows a case where a uniform force is acting in the lateral direction on the first to third sheet members. When the side flaps 14 are actually pulled in the lateral direction, the force acting on each sheet member is often uneven, and the amount of displacement of the positions of the holes 17h in the lateral direction is different. Becomes less noticeable. Thereby, the cut line 17 becomes inconspicuous, and it is possible to make it difficult for the user to feel uneasy.

  In the diaper 1, the skin side sheet | seat 26 and the back sheet | seat 24 which are located in the both outer sides of the thickness direction are comprised with the nonwoven fabric. Generally, since the fine fibers are arranged so as to be entangled with the surface of the nonwoven fabric, the surface is in a fuzzy state. Therefore, since the hole edge 17he of the hole 17h formed in the skin side sheet 26 and the back sheet 24 is also fuzzy, the outer edge (edge) of the hole 17h is less noticeable. As described above, the sheet members arranged on the outer side (in the above example, the second sheet member and the third sheet member) among the plurality of overlapping sheet members are made of nonwoven fabric or the like, thereby making the holes 17h more conspicuous. Can be difficult.

  6 and 7, the bonding target region H is provided at a position separated from the hole edge portion 17he. However, if the bonding portion 50 and the hole edge portion 17he have a region that does not overlap in the lateral direction. The bonding target region H may be set to overlap with the hole edge portion 17he. FIG. 10 is a diagram illustrating an example in which the joining target region H and the hole edge portion 17he overlap. In FIG. 10, the joining part 50 is formed in the joining object area | region H by the omega pattern (or spiral pattern). In this case, of the five holes 17h1 to 17h5 shown in FIG. 10, the hole edge 17he and the joint 50 do not overlap at least in the hole 17h3. Therefore, even when the side flap 14 is pulled in the lateral direction, the diameter of the opening does not appear to expand in the hole 17h3 as described with reference to FIG. Is possible.

  As described above, in the present embodiment, the joining portion 50 that joins the stacked sheet members to each other and at least one hole edge portion 17he among the plurality of hole edge portions 17he are not overlapped. Thereby, the hole 17h penetrating the sheet member becomes difficult to visually recognize, and the cut line 17 becomes less conspicuous.

<Modification>
In the above-described embodiment, the example in which the hole edge portion 17he and the joint portion 50 do not overlap has been described for each of the first to third sheet members. However, between the two sheet members that overlap among the three sheet members. If the hole edge portion 17he and the joint portion 50 do not overlap with each other, the cut line 17 can be made inconspicuous in the portion.

  11A and 11B are diagrams illustrating an example in which the hole edge portion 17he and the joint portion 50 overlap between the first sheet member and the second sheet member. In FIG. 11A, the hole edge portion 17he and the joint portion 50 do not overlap between the first sheet member (leakproof sheet 23) and the third sheet member (back sheet 24). Between the first sheet member (leakproof sheet 23) and the second sheet member (skin-side sheet 26), the hole edge 17he and the joint 50 overlap. FIG. 11B shows a case where a lateral force is applied to the sheet member in the state of FIG. 11A. In this case, as described with reference to FIG. 9, there is a large shift in the lateral position of the hole 17h between the first sheet member and the third sheet member. On the other hand, since the hole edge 17he, which is the outer edge of the hole 17h, is joined to each other between the first sheet and the second sheet, the displacement amount of the lateral position of the hole 17h is small, and the hole 17h is visible. It is easy to do. That is, the cut line 17 is not noticeable when viewed from the non-skin side (back sheet 24 side) of the diaper 1, but the cut line 17 is easily noticeable when viewed from the skin side (skin side sheet 26 side) of the diaper 1. Become.

  According to the modification, it is possible to configure the diaper 1 in which the cut line 17 is not easily seen from the outside (non-skin side) and the cut line 17 is easily seen from the inside (skin side). If it is such a structure, when removing the diaper 1, it will be easy to grasp | ascertain the position of the cut line 17 by turning up the side flap 14 and confirming an inner side. Accordingly, it is possible to make it difficult to recognize the cut line 17 in appearance, and to easily recognize the position of the cut line 17 from the inside.

  Conversely, the hole edge 17he and the joint 50 overlap between the first sheet member (leakproof sheet 23) and the third sheet member (back sheet 24), whereas the first It is also possible to adopt a configuration in which the hole edge portion 17he and the joint portion 50 do not overlap between the sheet member (leakproof sheet 23) and the second sheet member (skin-side sheet 26).

  Moreover, although the above-mentioned embodiment demonstrated the tear line 17 which penetrates three sheet members, the same effect can be acquired even when the tear line 17 penetrates two sheet members. For example, in the region of the rear portion 7c of FIGS. 5A and 5B, a part of the cut line 17 is two sheets of a skin side sheet 26 (referred to as a first sheet member) and a back sheet 24 (referred to as a second sheet member). The sheet member passes through the overlapped portion. That is, the hole 17h is formed in a portion where the leak-proof sheet 23 does not exist. Also in this case, at least one of the plurality of hole edge portions 17he does not overlap with the joint portion 50 that joins the first sheet member and the second sheet member, so that the hole 17h expands in the portion. Becomes difficult to visually recognize, and the cut line 17 can be made inconspicuous.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and it goes without saying that the present invention includes equivalents thereof.

  In the above-described embodiment, the cut line 17 is formed on the rear portion 7 side of the diaper 1, but the cut line may be formed in another part. In FIG. 1, a cutting line 19, which is a kind of cutting line, is formed along the vertical direction from the vertical end portion on the front portion 3 side of the side flap 14. The cutting line 19 is constituted by a plurality of holes 19h penetrating a sheet member such as the skin side sheet 26 like the cut line 17, and a hole edge 19he (not shown in FIG. 1) is provided on the outer periphery of the hole 19h. Is formed. Then, the cutting line 19 can be made inconspicuous as in the case of the cut line 17 by preventing the bonding portion 50 and the hole edge portion 19he that join the two overlapping sheet members from overlapping each other.

  By forming the cutting line 19 on the front part 3 of the diaper 1, that is, on the abdominal waistline part (first waistline part 3) side, when the diaper 1 is worn, the belly of the diaper 1 along the cutting line 19. It becomes easier to break the side. And the wearer's abdomen can be exposed with the diaper 1 worn while turning over the broken part and turning it back. When the wearer of the diaper 1 is a low-weight child, it is desirable to irradiate light over a wide range of the body when performing light therapy or the like. In such a case, it is possible to irradiate light over a wide range of the abdomen while minimizing contact with the body of the low-weight infant by breaking and folding the abdomen side of the diaper 1 along the cutting line 19. It becomes. Further, by providing the cutting line 19 at the position shown in FIG. 1, the first waistline portion 3 of the diaper 1 is easily bent along the roundness of the wearer's abdomen with the cutting line 19 as a base point. A feeling of fit can be improved.

  The cut line 17 and the cut line 19 are formed at substantially the same position in the lateral direction of the unfolded diaper 1 (see FIG. 1). When manufacturing the diaper 1, the sheet | seat member of the state of FIG. 1 is conveyed in the state which continued in multiple numbers in the longitudinal direction. That is, it is conveyed in the direction along the vertical direction in a state where the longitudinal front end of the diaper 1 in the unfolded state and the longitudinal rear end of the diaper 1 different from that are connected. And in the conveyance process, the cutting line 19 and the cut line 17 are formed continuously by making a plurality of holes along the vertical direction so as to straddle the connected portions. That is, since the cutting line 19 can be formed at the same time in the process of forming the cut line 17, there is no problem such as an increase in manufacturing cost of the diaper 1.

Moreover, the diaper 1 may have the following aspects.
(Aspect 1)
At each position on both sides in the lateral direction, leg-hole elastic members for contracting the leg opening portions in the vertical direction are provided along the vertical direction. Virtually divided into the waist opening portion and the leg opening portion, and when the leg elastic member is viewed from the thickness direction, the leg elasticity A disposable diaper characterized in that the member intersects with the portion on the waistline opening side of the curved portion.

(Aspect 2)
A plurality of sheet members laminated in the thickness direction, and the number of the sheet members stacked in the straight line portion of the cut line is larger than that of the sheet member in at least a part of the curved line portion of the cut line; Disposable diapers characterized by having fewer layers.

(Aspect 3)
A disposable diaper characterized by having a resin film (leak-proof sheet) in which the stretching direction at the time of manufacture is along the vertical direction, and the linear portion of the cut line 17 is formed on the resin film.

(Aspect 4)
At each position on both sides in the lateral direction, sheet-like three-dimensional gathers (leg side gathers) forming portions provided along the vertical direction are provided, and the three-dimensional gather forming portions stand up in the thickness direction. The longitudinal contraction force acting on the standing portion, which has a base end portion that is impossible and a standing portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum, arranged side by side in the lateral direction. The upright portion is contracted in the vertical direction based on the vertical direction, so that the upright portion rises on the skin side in the thickness direction, and the cut line is closer to the lateral direction than the proximal end portion and the upright portion. A disposable diaper characterized by being formed at an outer position.

(Aspect 5)
It has an absorptive core (absorber) formed by laminating a liquid absorptive material that absorbs liquid in the thickness direction, and the cut line is in the lateral direction rather than the absorptive core. The disposable diaper characterized by being formed in the outer position of.

1 disposable diapers (diapers),
3 front (first waistline), 5 crotch, 7 rear (second waistline),
12 Central strip area,
14 side flaps,
15 Leg gathers,
16 Legside gather,
17 tear line, 17h hole, 17h1-17h5 hole, 17he hole edge,
19 cutting line, 19h hole, 19he hole edge,
21 Absorber,
22 Top sheet,
23 Leak-proof sheet,
24 Back sheet (exterior sheet),
26 Skin side sheet,
27 elastic member,
29 Target tape,
30 Fastening tape,
50 joints,
H bonding target area,
HMA hot melt adhesive

Claims (9)

Having a first waistline part, a crotch part, and a second waistline part in a longitudinal direction;
A side flap in which the first sheet member and the second sheet member are overlaid;
Fastening tape joined to the second waistline side of the side flap;
A cut line provided on the second waistline side of the side flap, in which a plurality of holes penetrating the first sheet member and the second sheet member are arranged;
A disposable diaper comprising:
The first sheet member has a plurality of hole edges corresponding to the plurality of holes, each hole edge being along the outer periphery of each hole,
The joint portion that joins the first sheet member and the second sheet member that are overlapped, and at least one hole edge portion among the plurality of hole edge portions do not overlap,
The fastening tape is configured to be detachable by breaking the side flap along the cut line.
A disposable diaper characterized by that. The disposable diaper according to claim 1,
A third sheet member that is overlapped with the first sheet member on a surface opposite to the second sheet member;
At least one hole edge portion among the plurality of hole edge portions includes a joining portion that joins the first sheet member and the second sheet member, the first sheet member, and the third sheet member. A disposable diaper characterized in that it does not overlap with a joint part for joining together. The disposable diaper according to claim 1,
A third sheet member that is overlapped with the first sheet member on a surface opposite to the second sheet member;
At least one hole edge portion of the plurality of hole edge portions overlaps with a joint portion that joins the first sheet member and the second sheet member, and the first sheet member and the third sheet member are joined together. The disposable diaper characterized by not overlapping with the junction part which joins a sheet | seat member. The disposable diaper according to claim 2 or 3,
A disposable diaper, wherein at least one of the first sheet member and the third sheet member is formed of a nonwoven fabric. The disposable diaper according to any one of claims 1 to 4,
The disposable diaper, wherein the joining portion is formed by applying a hot melt adhesive in a spiral shape to at least one of the first sheet member and the second sheet member. It is a disposable diaper in any one of Claims 1-5,
The ratio of the holes per unit length in the direction in which the tear line extends in the region corresponding to the region in which the fastening tape is disposed in the longitudinal direction,
The disposable diaper characterized by being smaller than the ratio of the said hole per unit length of the direction where the said cut line extends in the area | region corresponding to the area | region where the said fastening tape is not arrange | positioned in the said vertical direction. The disposable diaper according to any one of claims 1 to 6,
By engaging the fastening tape with the first waistline portion, a waistline opening and a pair of leg hole openings are formed,
The disposable diaper, wherein the plurality of holes included in the cut line are arranged on a route extending from a portion serving as the waistline opening to a portion serving as the leg opening. A disposable diaper according to claim 7,
The cut line is a linear portion extending in the longitudinal direction from a portion that becomes the waistline opening,
In position inside the longitudinal direction than the linear portion, a curved portion which is curved outwardly in the lateral direction perpendicular to the longitudinal direction,
A disposable diaper characterized by comprising: It is a disposable diaper in any one of Claims 1-8,
A plurality of penetrating through the first sheet member and the second sheet member at the same position as the cut line with respect to the lateral position orthogonal to the longitudinal direction , provided on the first waistline side of the side flap. A disposable diaper characterized by comprising a cutting line in which the holes are lined up.

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