KR102214369B1 - Disposable diaper - Google Patents

Abstract

A side flap in which the first and second seat members are overlapped, and a path joined to the side of the second body circumference of the side flap, having a first body circumference part, a crotch part, and a second body circumference part in a vertical direction A disposable diaper comprising a ning tape and a perforated line formed on the side of the second body circumference of the side flap and in which a plurality of holes penetrating through the first sheet member and the second sheet member are lined up, wherein the first sheet The member has a first hole edge portion along an outer circumference of the first hole, and a second hole edge portion along an outer circumference of a second hole adjacent to the first hole, and the first sheet member and the second sheet overlapped The bonding portion for joining the members, and the first hole edge portion and the second hole edge portion overlap.

Description

Disposable diaper {DISPOSABLE DIAPER}

The present invention relates to a disposable diaper.

Conventionally, open-type disposable diapers are widely used. In the open type disposable diaper, a fastening tape is provided on the side flap, and a target tape to be bonded to the fastening tape is provided on the front part (also referred to as the abdominal part and the front body circumference). Since such an open type disposable diaper can be easily worn even when the wearer is sleeping, it is particularly widely used for newborns and infants.

Patent Document 1: Japanese Patent Laid-Open No. 2013-212212 Patent Document 2: Japanese Patent Laid-Open No. 2013-138702 Patent Document 3: Japanese Patent Laid-Open No. 2013-230256 Patent Document 4: Japanese Patent Laid-Open No. 2013-158573 Patent Document 5: International Publication No. 2013/077360

In the open type disposable diaper, when the used diaper is removed from the wearer's body, a perforated line may be formed for peeling off by tearing the outer part of the diaper without removing the fastening tape. The perforation line is constituted by a sewing line or the like in which a plurality of holes are lined up, and by tearing the diaper along the sewing line, it is possible to easily peel off the toilet and the like that are excreted inside the diaper without leaking to the outside.

On the other hand, when the diaper is small, the sewing line to be formed is also small and it is difficult to conspicuously, so it becomes difficult to grasp the position of the perforated line when the diaper is removed. In particular, when the wearer is a low-weight child with a weight of 3000 g or less, it may be necessary to attach and detach the diaper in an incubator with reduced lighting, but in such a dark environment, it becomes more difficult to determine the location of the perforation line.

The present invention has been made in view of the above problems, and an object thereof is to make the perforated line formed in a disposable diaper more conspicuous.

The main invention for achieving the above object is,

A side flap in which the first and second seat members are overlapped, and a path joined to the side of the second body circumference of the side flap, having a first body circumference part, a crotch part, and a second body circumference part in a vertical direction A disposable diaper comprising a ning tape and a perforated line formed on the side of the second body circumference of the side flap and in which a plurality of holes penetrating through the first sheet member and the second sheet member are lined up, wherein the first sheet The member has a first hole edge portion along an outer circumference of the first hole, and a second hole edge portion along an outer circumference of a second hole adjacent to the first hole, and the first sheet member and the second sheet overlapped It is a disposable diaper characterized in that the bonding portion for joining the members, and the edge portion of the first hole and the edge portion of the second hole overlap.

Other features of the present invention will be made clear from the description of the present specification and the accompanying drawings.

According to the present invention, in a disposable diaper having a perforated line, the perforated line can be easily conspicuous.

1 is an exploded plan view of the diaper 1.
2A to 2C are exploded explanatory views of each part of the diaper 1. 2A is an exploded view of the front portion 3. 2B is an exploded view of the crotch 5. 2C is an exploded view of the rear portion 7.
Fig. 3 is a diagram showing a state when the diaper 1 is worn by a low-weight child.
4 is a diagram showing a state when the diaper 1 is removed from the wearer's body.
5A and 5B are views for explaining the structure of the perforated line 17 of the diaper 1.
6 is an enlarged view showing an area of the rear portion 7b of FIG. 5A.
FIG. 7 is a diagram illustrating a section taken along BB in FIG. 6.
8A to 8B are diagrams showing examples of other patterns of the bonding portion 50.
9 is a view for explaining the state of the hole 17h when a force in the transverse direction is applied in FIG. 7.
10 is a view for explaining an example of a case in which the bonding portion 50 is formed of an omega pattern (or a spiral pattern) in the bonding target region H.
11A and 11B are views for explaining an example in which the hole edge portion 17he and the bonding portion 50 do not overlap between the first sheet member and the third sheet member.

At least the following matters become clear from description of this specification and accompanying drawings.

A side flap in which the first and second seat members are overlapped, and a path joined to the side of the second body circumference of the side flap, having a first body circumference part, a crotch part, and a second body circumference part in a vertical direction A disposable diaper comprising a ning tape and a perforated line formed on the side of the second body circumference of the side flap and in which a plurality of holes penetrating through the first sheet member and the second sheet member are lined up, wherein the first sheet The member has a first hole edge portion along an outer circumference of the first hole, and a second hole edge portion along an outer circumference of a second hole adjacent to the first hole, and the first sheet member and the second sheet overlapped Disposable diaper, characterized in that the bonding portion for joining the members and the edge portion of the first hole and the edge portion of the second hole overlap.

According to such a disposable diaper, two or more adjacent holes among the plurality of holes constituting the perforation line are widened to facilitate visual recognition, so that the perforated line formed in the diaper can be easily conspicuous.

As such a disposable diaper, the first sheet member has, for each of the plurality of holes, a hole edge portion along an outer circumference of the hole, and all of the hole edge portions of the plurality of hole edge portions include the first sheet member and It is preferable that it overlaps with the bonding part which bonds the said 2nd sheet member.

According to such a disposable diaper, since all the holes constituting the perforated line are widened and easily recognized, the perforated line formed in the diaper can be made more conspicuous.

As such a disposable diaper, having a third sheet member overlapping the first sheet member on a surface opposite to the second sheet member, the first hole edge portion and the second hole edge portion, the first sheet member It is preferable to overlap with a bonding portion for bonding the second sheet member and a bonding portion for bonding the first sheet member and the third sheet member.

According to such a disposable diaper, in the case where a force for pulling the sheet member in the transverse direction acts in the perforation line formed in the overlapping portion of the three sheet members, the enlargement of the hole constituting the perforation line becomes easy to visually recognize. Thereby, the perforation line can be made conspicuous.

As such a disposable diaper, having a third sheet member overlapping with the first sheet member on a side opposite to the second sheet member,

The first hole edge portion and the second hole edge portion overlap with a junction portion for bonding the first sheet member and the second sheet member, and overlap with a junction portion for bonding the first sheet member and the third sheet member It is desirable not to.

According to such a disposable diaper, in the perforation line formed in the overlapping portion of the three sheet members, when a force to pull the sheet member in the transverse direction acts, the hole constituting the perforation line when viewed from the side of the second sheet member The enlargement of the hole becomes easier to visually recognize, and the enlargement of the hole becomes difficult to visually recognize when viewed from the third sheet member side. Thereby, it is possible to form a perforated line that is difficult to see from one side (outer side) of the diaper and easy to see from the other side (inside).

As such a disposable diaper, it is preferable that the first sheet member is formed of a film sheet.

According to such a disposable diaper, by forming a hole in a film sheet having a smooth surface, the outer edge (edge) of the hole becomes more conspicuous. Thereby, the perforated line can be made more conspicuous.

In such a disposable diaper, it is preferable that the bonding portion is formed by spirally applying a hot melt adhesive to at least one of the first sheet member and the second sheet member.

According to such a disposable diaper, since it becomes possible to reduce the amount of the hot melt adhesive bonding the sheet member, the cost can be reduced. Further, since the unit weight of the hot-melt adhesive applied to the sheet member is reduced, the sheet member is suppressed from hardening by the hot-melt adhesive, and the feel of the diaper can be maintained smoothly.

As such a disposable diaper, the ratio of the holes occupied per unit length in the direction in which the perforation line extends among the regions corresponding to the regions in which the fastening tape is disposed in the vertical direction is the fastening tape in the vertical direction. It is preferable that the ratio of the hole occupied per unit length in the direction in which the perforation line extends among the regions corresponding to the regions in which are not arranged.

According to such a disposable diaper, even when the fastening tape is stretched in the transverse direction when wearing the diaper, it is suppressed that the side flaps are cut off by mistake. Further, when removing the diaper, the side flaps can be easily cut out along the perforated line.

As such a disposable diaper, by coupling the fastening tapes, respectively, to the first body circumferential portion, one body circumferential opening and a pair of leg circumferential openings are formed, and the plurality of holes included in the perforations, It is preferable to line up on a route extending from the portion that becomes the body circumferential opening to the portion that becomes the leg circumference opening.

According to such a disposable diaper, even when the diaper wearer is in a prone position (positioning position), the part to which the fastening tape is connected is cut along the perforation line, so that the wearer's body can be removed without moving as much as possible. There will be.

As such a disposable diaper, the perforation line includes a straight portion extending in the longitudinal direction from a portion serving as the body circumference opening, and a curved shape curved outward in the horizontal direction at a position inside the longitudinal direction than the straight portion. It is desirable to have parts.

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

As such a disposable diaper, a plurality of holes formed on the side of the side flap on the side of the first body circumference portion and penetrating the first sheet member and the second sheet member at the same position as the perforation line with respect to the horizontal position It is preferable to provide this lined cutting line.

According to such a disposable diaper, when wearing the diaper, the back side of the diaper can be torn along the cutting line. Then, by folding the torn part, it is possible to expose the abdomen of the wearer while wearing the diaper. In particular, when the wearer is a low-weight infant and it is necessary to perform phototherapy or the like, it becomes possible to irradiate light rays to a wide range of the exposed abdomen while minimizing contact with the body of the low-weight infant.

===embodiment===

<Basic composition of disposable diaper (1)>

The disposable diaper 1 of the present embodiment (hereinafter, also simply referred to as the diaper 1) is a disposable diaper mainly intended for wearing newborns and infants, and is a low-weight infant with a weight of 3000 g or less, especially a weight of less than 2500 g. It is suitable for low birth weight children. On the other hand, low birth 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 ultra low birth weight infants (weight less than 1000 g).

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

The diaper 1 of the present embodiment is a so-called open type disposable diaper, and as shown in FIG. 1, the first waist portion 3, the crotch portion 5, and the second waist portion 7 ). The first body circumference part 3 is a part which is located in the front part (abdominal side, front body circumference) of the wearer. In addition, the second waist portion 7 is a portion positioned at the rear portion (back side, rear waist portion) of the wearer. However, it is also possible to wear the diaper 1 with the first waist portion 3 as the wearer's back side and the second waist portion 7 as the wearer's belly side. In the following description, for convenience, the "first waist portion 3" is also referred to as the "front portion 3", and the "second waist portion 7" is also called the "rear portion 7".

In addition, as shown in Fig. 1, each direction is defined. That is, the direction from the front part 3 to the rear part 7 is made into "vertical direction", and the direction orthogonal to the vertical direction is made into "horizontal direction". Meanwhile, the vertical direction is a direction along the product length direction, and the horizontal direction is a direction along the product width direction. In addition, as shown in Fig. 2, the direction orthogonal to the vertical and horizontal directions is referred to as the "thickness direction", the wearer's skin side is referred to as the "skin side", and the opposite side is referred to as the "non-skin side".

The diaper 1 has a central strip-shaped region 12, a side flap 14, and a leg side gather 16. Fastening tapes 30 are attached to the pair of side flaps 14, respectively. Each of the fastening tapes is coupled to the first body circumferential portion, thereby forming one body circumferential opening and a pair of leg circumferential openings.

The center strip-shaped area 12 is a strip-shaped area located at the center portion in the transverse direction constituted by the front portion 3, the crotch portion 5, and the rear portion 7 (see Fig. 1). The central band-shaped region 12 is a portion that absorbs and holds liquid such as urine excreted by the wearer. The center strip-shaped region 12 has a vertically elongated shape (a shape along the vertical direction) including the liquid retaining absorber 21. The central band-shaped region 12 mainly includes an absorber 21, a top sheet 22, a leak prevention sheet 23, and a back sheet 24 (see Figs. 2A to 2C).

The absorber 21 is a member formed by laminating a liquid absorbent material capable of absorbing excrement such as urine, and is disposed over the front portion 3, the crotch portion 5, and the rear portion 7. A region indicated by a halftone portion in FIG. 1 indicates a region occupied by the absorber 21. The absorber 21 has an hourglass shape such that the width in the center portion in the vertical direction becomes narrower. However, the shape of the absorber 21 is not limited to the shape shown in Fig. 1, and may be a simple rectangle. In addition, the absorber 21 just needs to be formed at least in the crotch part 5. The absorber 21 is sandwiched between the top sheet 22 and the leak prevention sheet 23 and is disposed. As the liquid absorbent material constituting the absorbent body 21, for example, liquid absorbent fibers such as pulp fibers and liquid absorbent granular substances such as super absorbent polymers can be used. Further, liquid-absorbing materials other than liquid-absorbing fibers and liquid-absorbing granular materials 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 portion 5 is set so that the central portion of the wearer's hip and the central portion of the crotch portion 5 coincide. The center of the wearer's thigh refers to the central position of the portion where the leg is attached, and is a position shifted toward the front side from the central position CL of the diaper 1 in the vertical direction (see Fig. 1). Since the center of the crotch 5 is located on the front side of the diaper 1 rather than the central position CL, the wearer is more likely to move the leg forward (abdominal), and the rear of the diaper 1 By making the area of the part 7 relatively wide, it is possible to reliably cover the buttocks of the wearer.

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 leakage prevention sheet 23 is a liquid-impermeable member disposed on the non-skin side of the absorbent body 21, and is constituted, for example, of a film sheet. A back sheet 24 is disposed on the non-skin side of the leakage preventing sheet 23 (see Figs. 2A to 2C). The back sheet 24 is a member (exterior sheet) constituting an exterior of the diaper 1 on the non-skin side, and is formed of, for example, a nonwoven fabric.

The side flaps 14 are portions located on both side portions of the central strip-shaped region 12 in the transverse direction. The side flap 14 is formed over the front part 3, the crotch part 5, and the rear part 7 (refer FIG. 1). The length (width) of the side flaps 14 in the crotch portion 5 in the transverse direction is the length (width) of the side flaps 14 in the front portion 3 and the rear portion 7 Narrower than In addition, the length (width) in the transverse direction in the rear portion 7 of the side flap 14 is longer than the length (width) in the transverse direction in the front portion 3 of the side flap 14 Yes (see Fig. 1). Leg gathers 15 (leg circumferential expansion and contraction parts) that expand and contract along the longitudinal direction are formed on both ends of the pair of side flaps 14 in the transverse direction.

The side flap 14 is mainly composed of the skin side sheet 26 and the back sheet 24 (see Figs. 2A to 2C). The skin-side sheet 26 is a skin-side member formed over the front portion 3, the crotch portion 5, and the rear portion 7, and is made of, for example, a nonwoven fabric. The skin-side sheet 26 is also a member constituting the leg side gathers 16 (three-dimensional gather), and a portion outside the skin-side sheet 26 (a portion outside the junction 26A indicated by the broken line in FIG. 1 ). ) Constitutes the side flaps 14. The skin-side sheet 26 and the back sheet 24 are bonded to each other by a hot melt adhesive (hereinafter, also referred to as "HMA"). In addition, in a partial region of the side flap 14, the leakage preventing 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 of the side flap 14 and the back sheet 24. The elastic member 27 is a thread-shaped member that expands and contracts along the longitudinal direction, and is a member that imparts elasticity to the opening around the leg when the diaper 1 is worn. That is, the elastic member 27 is a leg-circumferential elastic member that fits the leg-circumferential portion of the diaper 1 to the wearer's leg. Then, the elastic member 27 imparts elasticity to the skin-side sheet 26 and the back sheet 24 of the crotch portion 5 to form the leg gathers 15. In FIG. 1, two elastic members 27 are provided along the longitudinal direction of a pair of side flaps 14, but the number or arrangement of the elastic members 27 is not limited thereto and can be appropriately adjusted. 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 the gap around the leg. A pair of leg side gathers 16 are formed along the longitudinal direction over the front part 3, the crotch part 5, and the rear part 7 (refer FIG. 1). The leg side gathers 16 are formed so as to cover both edges of the center strip-shaped region 12 from the inside of the side flap 14.

The leg side gathers 16 are mainly comprised of the inner part of the skin side sheet 26 (refer FIG. 2). The inner edge of the skin-side sheet 26 of the crotch portion 5 has elasticity by using thread rubber or the like. The skin-side sheet 26 is bonded along the longitudinal direction at the bonding portion 26A between the central strip-shaped region 12 and the side flap 14 (dashed line in Fig. 1). The region inside the joint portion 26A of the skin-side sheet 26 constitutes a leg side gather 16 (three-dimensional gather) with the joint portion 26A as a point.

The fastening tape 30 is attached to the side flaps 14 of the rear portion 7 (see Fig. 1). When a part of the fastening tape 30 is sandwiched between the skin-side sheet 26 and the back sheet 24 constituting the side flap 14 (see Fig. 2C), the fastening tape 30 is joined. have.

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 part 3 (see Fig. 2A). The target tape 29 is a member that can be coupled to the fastening tape 30 and is formed of, for example, a nonwoven fabric. The target tape 29 constitutes a target area to which the fastening tape 30 is bonded. On the other hand, 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 nonwoven fabric of the outermost layer of the back sheet 24. By bonding this fastening tape 30 to the target tape 29, the diaper 1 is worn.

Further, on the side of the rear portion 7 of the side flap 14, that is, the side to which the fastening tape 30 of the side flap 14 is bonded, a perforated line 17 indicated by a thick dotted line in FIG. 1 is formed. Details of the perforated line 17 will be described later.

The length of the product in the longitudinal direction of the diaper 1 for underweight infants of the present embodiment (the dimension in a state in which the product is stretched in the longitudinal direction without wrinkles) is in the range of 210 to 330 mm. For example, the product length of the diaper 1 for low birth weight infants weighing less than 2500 g is 310 mm, and the product length of the diaper 1 for extremely low birth weight infants weighing less than 1500 g is 270 mm, and weight 1000 In the case of the diaper 1 for very low birth weight babies of less than g, the product length is 230 mm.

In addition, the waist size of the diaper 1 for underweight infants of this embodiment is in the range of 160 to 295 mm. On the other hand, the waist dimension is a product without wrinkles in a state where the end of one fastening tape 30 is aligned with the end of the side flap 14 side of the hook sheet area C of the other fastening tape 30. It is the dimension in the state of being stretched. In other words, it is the dimension in the state in which the product is stretched in the width direction. For example, the waist size of the diaper 1 for low birth weight children is 273.5 mm, and the waist size in the case of the diaper 1 for extremely low birth weight children less than 1500 g in weight is 220 mm.

<About putting on and taking off the diaper (1)>

Next, a method of attaching and detaching the diaper 1 will be described. First, when the diaper 1 is worn by the wearer, the diaper 1 in an unfolded state as shown in FIG. 1 is opened, the rear portion 7 of the center strip-shaped region 12 is the back of the wearer, and the front portion 3 ) To follow the wearer's abdomen. Then, the fastening tape 30 is coupled to the target tape 29 provided on the front part 3 by winding the rear part 7 of the side flap 14 from the back side of the wearer to the abdomen in the body circumferential direction.

Fig. 3 is a diagram showing 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 low-weight children. If the wearer is a low birth weight child, especially if the wearer is an extremely low birth weight child (weight less than 1500 g) or an ultra low birth weight child (weight less than 1000 g), ``minimum handling'' to avoid stress by avoiding contact with the body as much as possible. 'Is sometimes required. Therefore, after putting the diaper 1 on the underweight child, as shown in Fig. 3, the back is curved in a C shape and the legs are strongly bent in an M shape, so that the wearer is laid down in a stable state. desirable. The posture shown in Fig. 3 is a posture that is close to the posture of the fetus in the mother body (the same flexion posture as the fetus) and is easy to stabilize, and is also called a "positioning posture".

When the diaper 1 is removed from the wearer's body, the fastening tape 30 bonded to the target tape 29 is removed, and the diaper 1 is unfolded in the reverse order of wearing. However, when the wearer is in the positioning posture as shown in FIG. 3, the fastening tape 30 is hidden on the wearer's back side. Therefore, in order to remove the fastening tape 30, the wearer's body must be in a state where the wearer's body is once facing upward and the wearer's back is visible, but moving the wearer's body only to remove the diaper 1 is " It is not preferable from the viewpoint of "minimum handling". Therefore, in the diaper 1, the perforated line 17 is formed in the side flap 14 so that the diaper 1 can be removed without moving the wearer's body.

4 is a diagram showing a state when the diaper 1 is removed from the wearer's body. When the diaper 1 is removed, the side flaps 14 are torn off along the perforated line 17 from the waist opening to the leg opening. Thereby, the diaper 1 can be removed from the wearer's body while the fastening tape 30 is attached to the target tape 29 on the back side. That is, as shown in Fig. 4, by separating the portion to which the fastening tape 30 is connected from the side flaps 14 at both ends of the diaper 1 in the transverse direction, and putting the diaper 1 in an unfolded state. , The diaper 1 can be easily removed without changing the posture of the wearer (low weight child).

<Structure of the perforation line>

The detailed structure of the perforated lines 17 formed in the diaper 1 will be described.

5A and 5B are diagrams for explaining the structure of the perforated line 17 of the diaper 1. The perforated line 17 of this embodiment is formed on the side of the rear portion 7 in the longitudinal direction of the side flap 14, that is, on the side to which the fastening tape 30 is connected, and a plurality of holes 17h are formed. It is a portion formed in the shape of a sewing line by being lined up on a route extending from the opening around the body to the opening around the leg. The plurality of holes 17h penetrate through the skin-side sheet 26, the back sheet 24, and the leak-preventing sheet 23, respectively, constituting the side flaps 14 in the thickness direction in some regions. In Fig. 5A, an example in which the hole 17h is circular is shown, and in Fig. 5B, an example in which the hole 17h is elliptical is shown. On the other hand, the shape of the hole 17h may be other than this, and may be, for example, a rectangular slit or the like. Further, the size of the hole 17h (diameter of the opening) is determined according to the size of the diaper 1 or the material of the base material constituting the diaper, such as the skin-side sheet 26.

5A and 5B, the area of the rear portion 7 in the longitudinal direction of the diaper 1 is divided into three areas: a rear portion 7a, a rear portion 7b, and a rear portion 7c. have. The rear portion 7b is a region formed at a position substantially corresponding to the position where the fastening tape 30 is disposed in the vertical direction, and the rear portion 7a is a rear side in the vertical direction than the rear portion 7b ( It is a region in the vertical direction), and the rear portion 7c is a region on the front side (inner side in the vertical direction) in the vertical direction than the rear portion 7b. The plurality of holes 17h of the perforation line 17 are in the region of the rear portion 7a and the rear portion 7b, along the joint portion 26A between the center strip-shaped region 12 and the side flap 14 It forms a straight part lined up in a straight line in the vertical direction. Further, the plurality of holes 17h form curved portions arranged so as to be curved toward the leg circumferential opening side of the outer end of the diaper 1 in the transverse direction in the region of the rear portion 7c. Since the perforated line 17 has a straight portion and a curved portion in this way, the side flap 14 can be easily cut out even when the diaper 1 is worn. For example, when the wearer of the diaper 1 is in the positioning posture as shown in FIG. 3, the wearer's leg is bent in an M shape and is positioned on the front side of the body, so the leg opening of the diaper 1 is also on the front side. Will be located. In this state, when trying to tear the side flaps 14 from the body circumferential opening to the leg circumferential opening, it is necessary to cut it at an angle along the direction in which the leg is bent. In contrast, in the diaper 1 of the present embodiment, the perforated line 17 is curved toward the leg circumferential opening, and the side flap 14 is torn along the perforated line 17, whereby the wearer is in a positioning posture. Even if it is possible to simply separate the portion of the fastening tape 30.

In addition, the spacing (pitch) between the holes 17h adjacent to each other on the perforated line 17 is different for each region. Specifically, the distance Lhb from the outer peripheral edge of a certain hole 17h to the outer peripheral edge of the adjacent hole 17h among the regions of the rear portion 7b is the regions of the rear portion 7a and the rear portion 7c. It is wider than the distance (Lha) from the outer peripheral edge of any of the holes 17h to the outer peripheral edge of the adjacent hole 17h (Lhb>Lha). In other words, the ratio of the hole 17h occupied per unit length on the perforated line 17 in the area of the rear portion 7b is a unit on the perforated line 17 in the area of the rear portion 7a or the rear portion 7c. It is smaller than the ratio of the holes 17h occupied per length. That is, in the area of the rear portion 7b, the ratio of the holes penetrating the skin-side sheet 26 or the back sheet 24 is small, so that the side flaps are compared with the areas of the rear portion 7a and the rear portion 7c. It becomes difficult to cut (14). This is because when the fastening tape 30 is stretched in the transverse direction when the diaper 1 is worn, a force outside the transverse direction acts on the region of the rear portion 7b and the side flaps 14 are cut off. It is to suppress that. Conversely, when removing the diaper 1, in the area of the rear portion 7a that is the part of the cutting start or the rear portion 7c where the perforation line 17 is curved, the side flaps are compared with the rear portion 7b. It becomes easy to cut (14). Thereby, when the diaper 1 is worn, the side flap 14 is prevented from being cut off by mistake. On the other hand, when the diaper 1 is removed, the side flap 14 is simply removed along the perforation line 17. Can be cut out.

<About the appearance of the perforation line>

When the diaper 1 is worn, the perforated line 17 is disposed on the side of the wearer. However, the plurality of holes 17h constituting the perforated line 17 are often very small, and the perforated line 17 is difficult to visually recognize. In fact, since the diaper 1 of the present embodiment is assumed to be worn by a low-weight child, the size of the diaper itself is small, and there is a high possibility that the individual holes 17h are formed slightly smaller accordingly. Therefore, when removing the diaper 1, it may become difficult to recognize the position of the perforated line 17. In addition, hospitals and the like often protect underweight infants by putting them in an incubator, but in some cases, incubators are not equipped with lights to reproduce the mother's uterus. When attempting to attach and detach the diaper 1 in a dark environment without such illumination, it becomes more difficult to recognize the position of the perforation line 17.

Regarding these problems, in the diaper 1 of the present embodiment, the perforation 17 is made to be conspicuous (easily recognizable) in the diaper 1 of the present embodiment. It makes it easier to recognize the location of.

6 is an enlarged view showing an area of the rear portion 7b of FIG. 5A. FIG. 7 is a diagram illustrating a cross section taken along line B-B in FIG. 6. On the other hand, in FIG. 6, ten holes 17h of holes 17h1 to 17h10 are shown along the perforation line 17. Each hole 17h is shown as a circle having a diameter D1, but the shape of the hole may be other than a circle.

6 and 7, the skin side sheet 26, the leakage prevention sheet 23, and the hole 17h formed in the back sheet 24 have a predetermined width along the outer periphery (outer edge). A hole edge portion 17he is set in the region. The hole edge portion 17he is formed corresponding to each of the plurality of holes 17h constituting the perforated line 17, and the distance w from the outer peripheral portion of the hole 17h to the outer peripheral portion of the hole edge portion 17he is , For example, it has a size of about 0.1 to 1.0 mm. In the following description, the leakage preventing sheet 23 is referred to as a first sheet member, the skin-side sheet 26 is referred to as a second sheet member, and the back sheet 24 is referred to as a third sheet member.

A bonding target region H for bonding both sheets is formed between the first sheet member and the second sheet member. The area indicated by the halftone dots in FIGS. 6 and 7 is the bonding target region H, and in the present embodiment, a strip-shaped bonding target region H is formed along the vertical direction so as to include the perforated line 17. That is, the bonding target region H is formed so as to surround the hole 17h. And, by applying an adhesive such as a hot melt adhesive (HMA) to a predetermined range of the area to be bonded (H) between the two sheet members overlapping in the thickness direction, the bonding portion 50 for bonding the two sheet members to each other is Is formed. Similarly, a bonding target region H for bonding both sheets is formed between the first sheet member and the third sheet member, and a bonding portion 50 is formed in the bonding target region H.

In FIGS. 6 and 7, HMA is applied to at least one of the first sheet member and the second sheet member in all ranges of the region to be bonded (H). That is, the bonding portion 50 is formed in a substantially rectangular strip shape along the vertical direction in a range equivalent to the bonding target region H. Thereby, the plurality of holes 17h constituting the perforated line 17 are in a state where each is surrounded by the HMA. In this specification, such an HMA application pattern is referred to as a "coater pattern". In the coater pattern, it is possible to firmly bond two sheet members, and it is suitable for a case where it is desired to secure bonding strength. However, the shape of the bonding portion 50 is not limited to the coater pattern, and it is possible to form the bonding portion 50 in various patterns other than the coater pattern by changing the HMA application pattern within the range of the bonding target region H. .

8A to 8B are diagrams showing examples of other patterns of the bonding portion 50. Fig. 8A shows an example in which HMA is applied in a spiral manner within the range of the region to be bonded H. In this specification, such an application pattern is called 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. In addition, since the unit weight of HMA in the area to be bonded (H) is reduced, the sheet is suppressed from hardening by the HMA, and the feel of the diaper 1 in the area to be bonded (H) is maintained smoothly. I can. Fig. 8B shows an example in which the HMA is applied so as to meander along the vertical direction within the range of the region H to be bonded. In this specification, such an application pattern is called "omega pattern". In the bonding portion 50 formed by the omega pattern, like the spiral pattern, it is possible to reduce the amount of HMA to be used, and the tactile feel of the bonding target region H can be softened.

As shown in FIG. 7, in the diaper 1 of this embodiment, the bonding portion 50 and the hole edge portion 17he are formed at overlapping positions in the horizontal direction. In other words, between the first sheet member (leak prevention sheet 23) and the second sheet member (skin side sheet 26), and the first sheet member (leakage prevention sheet 23) and the third sheet member (back Between the sheets 24, the perforated edge portions 17he are joined to each other. Thereby, when the diaper 1 is attached or detached, the side flaps 14 are stretched in the transverse direction, so that when a force in the transverse direction is applied to the portion of the hole 17h, the hole 17h is easily conspicuous. can do.

9 is a view for explaining the state of the hole 17h when a force in the transverse direction is applied in FIG. 7. When a force for tensioning the side flaps 14 in the transverse direction is applied, as shown in Fig. 9, shifts in the shear direction occur in the first to third sheet members, respectively. At the same time, a force acts on the hole 17h formed in each sheet member in the direction of expanding the diameter of the opening, and the diameter of the hole 17h indicated by D1 in FIG. 7 is widened from Figs. 9 to D2 (D2). >D1).

Here, since the hole edge portion 17he formed around the hole 17h of the first sheet member and the hole edge portion 17he formed around the hole 17h of the second sheet member are joined to each other, the two sheets It is difficult to cause a shift in the position of the hole 17h in the transverse direction between the members. Similarly, even between the first sheet member and the third sheet member, a shift in the position of the hole 17h in the transverse direction is unlikely to occur. As a result, with respect to the hole 17h, the diameter of the region penetrating from the first sheet member to the third sheet member in the thickness direction seems to be widened from D1 to D2 (D2>D1), and the hole 17h is easy to recognize. Lose. On the other hand, in Fig. 10, a case where an equal force is applied in the transverse direction is illustrated with respect to the first to third sheet members. In fact, when the side flaps 14 are stretched in the transverse direction, the force acting on each sheet member is often uneven. However, even in the case where the force acting direction is uneven, if the hole edge portion 17he and the joint portion 50 overlap between the two sheet members, the positional shift of the hole 17h in the transverse direction is unlikely to occur. As described above, since the opening of the hole 17h seems to be widened, it becomes easy to visually recognize the perforated line 17.

On the other hand, in order to make the perforated line 17 easier to recognize, it is preferable to make two or more adjacent holes 17h appear wider among the plurality of holes 17h arranged along the perforated line 17. That is, when two adjacent holes 17h are each a first hole and a second hole, the first hole edge portion along the outer circumference of the first hole and the second hole edge portion along the outer circumference of the second hole, It is preferable to overlap with the joining portion 50 for joining the two sheet members. For example, in FIG. 6, when the hole 17h1 is used as the first hole and the hole 17h2 adjacent to the hole 17h1 is used as the second hole, only the first hole is widening alone. This is because the one where the 1st hole and the 2nd hole are continuously widening is more conspicuous. Therefore, when the bonding target region H is set along the perforated line 17 and the bonding portion 50 of the coater pattern is formed, all of the holes 17h included in the bonding target region H are widened. Since it becomes visible, the whole perforation line 17 becomes more conspicuous. In the case of Fig. 6, ten holes 17h of 17h1 to 17h10 in succession are easily visually recognized, and the perforated line 17 is easily conspicuous.

In addition, in the side flap 14 in which the perforated line 17 is formed in the diaper 1 of the present embodiment, the leakage preventing sheet 23 made of a film sheet between the skin-side sheet 26 and the back sheet 24 Has been placed. By forming the hole 17h in this film sheet, it is possible to make it easy to recognize the outer shape of the hole 17h. This is because the film sheet has a smooth surface, and when the hole 17h is formed on the smooth surface, the outer edge (edge) of the hole 17h becomes more conspicuous. Therefore, by forming the hole 17h in the position in the side flap 14 where the leakage preventing sheet 23 is arranged, the perforated line 17 can be made more conspicuous.

In addition, in FIG. 6, the bonding portion 50 by the coater pattern was formed in the area to be bonded (H), but the above-described effect can be obtained even when the bonding portion 50 is formed by an omega pattern or a spiral pattern. Do. 10 is a view for explaining an example of a case in which the bonding portion 50 is formed of an omega pattern (or a spiral pattern may be used) among the bonding target region H. FIG. In this case, of the five holes of the holes 17h1 to 17h5 shown in FIG. 10, the adjacent hole 17h1 and the hole 17h2, and the hole 17h4 and the hole 17h5 have a joint ( 50) and the hole edge 17he overlap. Therefore, when the side flap 14 is stretched in the transverse direction, at least in the hole 17h1 and the hole 17h2, and the hole 17h4 and the hole 17h5, the diameter of the opening is increased as described in FIG. As it appears, it is possible to make the perforation line 17 conspicuous.

As described above, in this embodiment, the bonding portion 50 for bonding the overlapped sheet members to each other, and the hole edge portion 17he of the adjacent two or more holes 17h among the plurality of holes 17h are overlapped. . In other words, the first hole edge portion along the outer circumference of the first hole and the second hole edge portion along the outer circumference of the second hole adjacent to the first hole are the bonding portion 50 for joining the first sheet member and the second sheet member. ) And overlapping. Thereby, the hole 17h penetrating through the sheet member becomes easy to visually recognize, and the perforation line 17 becomes more conspicuous.

<modification example>

In the above-described embodiment, for each of the first to third sheet members, an example in which the hole edge portion 17he and the joint portion 50 are overlapped has been described, but two sheet members overlapping among the three sheet members If the hole edge portion 17he and the joint portion 50 overlap between each other, the perforation line 17 can be easily conspicuous in the above portion.

11A and 11B are views for explaining an example in which the hole edge portion 17he and the bonding portion 50 do not overlap between the first sheet member and the third sheet member. In Fig. 11A, the hole edge portion 17he and the joint portion 50 overlap between the first sheet member (leak prevention sheet 23) and the second sheet member (skin-side sheet 26). Between the 1 sheet member (leak prevention sheet 23) and the 3rd sheet member (back sheet 24), the hole edge part 17he and the bonding part 50 do not overlap. Fig. 11B shows a case where a force in the transverse direction is applied to the sheet member in the state of Fig. 11A. Between the first sheet member and the second sheet member, as described in Fig. 9, the positional shift of the hole 17h in the transverse direction is unlikely to occur, and the size of the opening is widened from D1 to D2, so that the hole 17h ) Becomes easier to recognize. On the other hand, between the first sheet member and the third sheet member, since the hole edge portion 17he is not joined by the bonding portion 50, the shift in the shear direction between the sheet members increases, and the hole 17h It is also easy to increase the positional deviation in the horizontal direction. In this state, when the hole 17h is viewed from the non-skin side in the thickness direction, the area actually penetrated is the range indicated by D3 in Fig. 11B, and the size of the hole 17h appears to be narrower than D2 (D2>D3). In other words, when viewed from the skin side of the diaper 1 (skin side sheet 26 side), the perforation line 17 is easily conspicuous, but when viewed from the non-skin side (back sheet 24 side) of the diaper 1 In this case, the perforation line 17 becomes difficult to be conspicuous.

According to the modified example, it is possible to configure the diaper 1 in which the perforated line 17 is difficult to see from the outside (on the non-skin side), and the perforated line 17 is easily visible from the inner side (the skin side). By setting it as such a structure, when the diaper 1 is peeled off, the position of the perforation line 17 can be easily grasped by raising the side flap 14 and checking the inside. On the other hand, since the hole 17h of the perforation line 17 becomes difficult to see from the outside of the diaper 1, for the user, excrement may leak out of the diaper 1 from the hole 17h. It is possible to suppress the occurrence of anxiety that the diaper 1 may be torn when worn or worn.

On the contrary, between the first sheet member (leak prevention sheet 23) and the third sheet member (back sheet 24), the hole edge portion 17he and the joint portion 50 are overlapped, and the first sheet member (leak prevention sheet 23) is overlapped. Between the sheet 23 and the second sheet member (skin-side sheet 26), it is also possible to make the hole edge portion 17he and the bonding portion 50 not overlapped.

In addition, in the above-described embodiment, although the perforation line 17 penetrating through three sheet members has been described, the same effect can be obtained even when the perforation line 17 penetrates through two sheet members. For example, in the region of the rear portion 7c of Figs. 5A and 5B, a part of the perforated line 17 is the skin side sheet 26 (referred to as the first sheet member) and the back sheet 24 (the second sheet member). The two sheet members are passing through the overlapped portion. That is, the hole 17h is formed in the part where the leak prevention sheet 23 does not exist. Also in this case, the first hole edge portion 17he and the second hole edge portion 17he adjacent to the hole edge portion 17he formed along the outer periphery of the plurality of holes 17h, and the first sheet member And the joining portion 50 for joining the second sheet member overlapping, the enlargement of the hole 17h in the portion can be easily visually recognized, and the perforated line 17 can be easily conspicuous.

===Others===

The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit and interpret the present invention. It goes without saying that the present invention can be changed and improved without departing from its spirit, and the present invention includes equivalents thereof.

In the above-described embodiment, the perforated lines 17 were formed on the rear portion 7 side of the diaper 1, but the perforated lines may be formed at other portions. In FIG. 1, a cutting line 19, which is a type of perforation line, is formed along the longitudinal direction from the longitudinal end of the side flap 14 on the front part 3 side. The cut line 19 is constituted by a plurality of holes 19h penetrating through a sheet member such as the skin-side sheet 26, similarly to the perforation line 17, and the periphery of the hole 19h is formed on the outer periphery of the hole 19h. (19he) (not shown in Fig. 1) is formed. In addition, as in the case of the perforation line 17, the cutting line 19 is easily conspicuous, as in the case of the perforation line 17, by overlapping the bonding portion 50 for joining the two overlapping sheet members and two or more adjacent hole edge portions 19he. can do.

The cutting line 19 is formed on the front portion 3 of the diaper 1, that is, on the side of the waist side (first waist portion 3), so that when the diaper 1 is worn, the cutting It becomes easy to tear the back side of the diaper 1 along the line 19. Then, by folding the torn part, the abdomen of the wearer can be exposed while wearing the diaper 1. When the wearer of the diaper 1 is a low-weight child, it is preferable to irradiate light rays over a wide range of the body when performing light therapy or the like. In this case, by tearing and folding the abdomen side of the diaper 1 along the cutting line 19, it becomes possible to irradiate light rays over a wide area of the abdomen while minimizing contact with the body of the low-weight infant. In addition, since the cutting line 19 is formed at the position shown in FIG. 1, the first body circumference 3 of the diaper 1 follows the rounded shape of the abdomen of the wearer using the cutting line 19 as a starting point. It becomes easy to bend, and the fitting feeling of the diaper 1 can be improved.

On the other hand, the perforated line 17 and the cutting line 19 are formed at substantially the same position in the transverse direction of the diaper 1 in an unfolded state (see Fig. 1). When manufacturing the diaper 1, the sheet members in the state of Fig. 1 are conveyed in a state in which a plurality of sheet members are successively connected in the longitudinal direction. That is, the longitudinal front end of the diaper 1 in the deployed state and the longitudinal rear end of the diaper 1 different therefrom are conveyed in the longitudinal direction in a connected state. And, in the conveyance process, the cutting line 19 and the perforation line 17 are continuously formed by drilling a plurality of holes along the longitudinal direction so as to span the connected portion. That is, since the cutting line 19 can also be formed at the same time in the process of forming the perforated line 17, a problem such as an increase in the manufacturing cost of the diaper 1 does not occur.

In addition, the diaper 1 may have the following aspects.

(Mode 1)

At each position on both sides in the transverse direction, a leg circumferential elastic member for contracting a portion serving as a leg circumference opening in a longitudinal direction is provided along the longitudinal direction, and a curved portion of the perforation is virtually placed on the body circumference opening side. When the leg elastic member is viewed from the thickness direction, the leg elastic member is formed on the body peripheral opening side of the curved portion. Disposable diaper, characterized in that it crosses the part.

(Mode 2)

Disposable, characterized in that it has a plurality of sheet members stacked in the thickness direction, and the number of sheets stacked in at least some of the curved portions of the perforated line is smaller than the number of stacked sheets of the sheet member in a straight portion of the perforated line. diaper.

(Aspect 3)

Disposable diaper, characterized in that the stretching direction at the time of manufacture has a resin film (leak prevention sheet) along the longitudinal direction, and a straight portion of the perforated line (17) is formed in the resin film.

(Mode 4)

A sheet-shaped three-dimensional gather (leg side gather) forming portion formed along the vertical direction is provided at each position on both sides of the horizontal direction, and the three-dimensional gathering portion includes a base end that cannot stand in the thickness direction and the base end as points. The standing portions that can stand up to the skin side in the thickness direction are arranged side by side in the horizontal direction, and the standing portions are contracted in the vertical direction based on the contracting force in the vertical direction acting on the standing portion, so that the standing portions are toward the skin side in the thickness direction. The disposable diaper, wherein the diaper is erected, and wherein the perforated line is formed at a position outside the base end portion and the erect portion in the transverse direction.

(Aspect 5)

An absorbent core (absorbent) formed by laminating a liquid absorbent material for absorbing liquid in the thickness direction is disposed in the center of the transverse direction, and the perforation is formed at a position outside the absorbent core in the transverse direction. Disposable diaper characterized by.

1: Disposable diaper (diaper) 3: Front part (first body circumference part)
5: crotch part 7: rear part (the second trunk circumference part)
12: center strip-shaped area 14: side flap
15: leg gathers 16: leg side gathers
17: perforation 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: joint
H: bonding target area HMA: hot melt adhesive

Claims (10)

Having a first body circumference portion, a crotch portion and a second body circumference portion in a longitudinal direction,
A side flap in which the first sheet member and the second sheet member are overlapped,
A fastening tape bonded to the second body circumferential side of the side flap,
A perforated line formed on the side of the second body circumference of the side flap and arranged with a plurality of holes passing through the first sheet member and the second sheet member
And,
A disposable diaper in which one body circumference opening and a pair of leg circumference openings are formed by bonding the fastening tape to the first body circumference portion,
The perforated line is a portion torn when removing the disposable diaper from the wearer's body,
The perforation line extends from the body circumferential opening to the leg circumferential opening,
The first sheet member has a first hole edge portion along an outer circumference of the first hole, and a second hole edge portion along an outer circumference of a second hole adjacent to the first hole,
A junction portion for joining the overlapped first sheet member and the second sheet member, and the first hole edge portion and the second hole edge portion overlap
Disposable diaper, characterized in that. The method according to claim 1, wherein the first sheet member has, for each of the plurality of holes, a hole edge portion along an outer periphery of the hole,
Disposable diaper, characterized in that all of the perforated edge portions of the plurality of perforated perforations overlap with a joint portion for joining the first sheet member and the second sheet member. The method according to claim 1 or 2, having a third sheet member overlapping the first sheet member on a surface opposite to the second sheet member,
The first hole edge portion and the second hole edge portion overlap with a bonding portion for bonding the first sheet member and the second sheet member and a bonding portion for bonding the first sheet member and the third sheet member Disposable diapers. The method according to claim 1 or 2, having a third sheet member overlapping the first sheet member on a surface opposite to the second sheet member,
The first hole edge portion and the second hole edge portion overlap with a junction portion for bonding the first sheet member and the second sheet member, and overlap with a junction portion for bonding the first sheet member and the third sheet member Disposable diaper, characterized in that not. The disposable diaper according to claim 1 or 2, wherein the first sheet member is formed of a film sheet. The disposable diaper according to claim 1 or 2, wherein the bonding portion is formed by spirally applying a hot melt adhesive to at least one of the first sheet member and the second sheet member. The method according to claim 1 or 2, wherein a ratio of the hole occupied per unit length in a direction in which the perforation line extends among a region corresponding to a region in which the fastening tape is disposed in the vertical direction,
Disposable diaper, characterized in that the ratio of the holes occupied per unit length in a direction in which the perforation line extends among regions corresponding to regions in which the fastening tape is not disposed in the vertical direction. The method according to claim 1 or 2, wherein each of the fastening tapes is coupled to the first body circumference to form one body circumference opening and a pair of leg circumference openings,
A disposable diaper, characterized in that the plurality of holes included in the perforation line are arranged on a route extending from a portion serving as the waist opening portion to a portion serving as the leg opening portion. The method of claim 8, wherein the perforated line comprises a straight portion extending in the vertical direction from a portion serving as the opening around the body,
A disposable diaper comprising a curved portion curved outward in a transverse direction orthogonal to the longitudinal direction at a position inside the longitudinal direction than the straight portion. The first sheet member and the first sheet member according to claim 1 or 2, wherein the side flaps are formed on the side of the first body circumference and are at the same position as the perforation with respect to a position in a horizontal direction orthogonal to the vertical direction. A disposable diaper comprising a cutting line in which a plurality of holes penetrating through the second sheet member are arranged.

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