KR20170036041A - Disposable diaper - Google Patents

Abstract

A side flap having a first waist portion, a crotch portion and a second waist portion side by side in a longitudinal direction and having a first sheet member and a second sheet member superimposed on each other, And a perforated line formed on the side of the second waist region of the side flap and having a plurality of holes extending through the first sheet member and the second sheet member, Wherein the member has a plurality of hole edge portions corresponding to the plurality of holes, each of the hole edge portions includes a joining portion that joins the first sheet member and the second sheet member which are overlapped with each other along the periphery of each hole, At least one hole edge portion of the hole edge portion is not overlapped.

Description

Disposable diaper {DISPOSABLE DIAPER}

The present invention relates to a disposable diaper.

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 front portion (also referred to as a portion on the back side or a front waist portion) is provided with a target tape to be coupled with the fastening tape. Such an open type disposable diaper is widely used especially for newborn babies and infant babies because it can be easily worn even when the wearer is asleep.

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

In the open type disposable diaper, when the diaper after use is taken off the wearer's body, there is a case where a perforated line is formed for peeling off the outer portion of the diaper without removing the fastening tape. The perforated line is constituted by a seam line or the like with a plurality of holes arranged. By tearing the diaper along the seam line, the left and right feces discharged in the diaper can be easily peeled off without leaking to the outside.

On the other hand, if such a seam line is conspicuous, an impression such as a hole in the diaper is given to the user of the diaper, or the impression that the strength of the diaper is weak is given, There is a concern.

The present invention has been made in view of the above problems, and it is an object of the present invention to make perforated lines formed on a disposable diaper less noticeable.

According to a first aspect of the present invention,

A side flap having a first waist portion, a crotch portion and a second waist portion side by side in a longitudinal direction and having a first sheet member and a second sheet member superimposed on each other, And a perforated line formed on the side of the second waist region of the side flap and having a plurality of holes extending through the first sheet member and the second sheet member, Wherein the member has a plurality of hole edge portions corresponding to the plurality of holes, each of the hole edge portions includes a joining portion that joins the first sheet member and the second sheet member which are overlapped with each other along the periphery of each hole, Is not overlapped with at least one of the hole edge portions of the hole edge portion of the first member.

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

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

1 is a developed plan view of a diaper 1. Fig.
Figs. 2A to 2C are explanatory explanatory views of respective parts of the diaper 1. Fig. 2A is an exploded view of the front portion 3. Fig. 2B is an explanatory explanatory view of the crotch part 5. Fig. 2C is an explanatory explanatory view of the rear portion 7. Fig.
3 is a view showing a state in which the diaper 1 is worn by a low birth weight infant.
Fig. 4 is a view showing a state when the diaper 1 is removed from the wearer's body.
Figs. 5A and 5B are views for explaining the structure of the perforated line 17 of the diaper 1. Fig.
Fig. 6 is an enlarged view of the area of the rear portion 7b of Fig. 5A.
Fig. 7 is a view showing the cross section taken along line BB in Fig. 6. Fig.
8A to 8B are views showing examples of other patterns of the joining portion 50. Fig.
Fig. 9 is a view for explaining the shape of the hole 17h when a force in the transverse direction acts in Fig. 7. Fig.
Fig. 10 is a view for explaining an example of a case where the area to be bonded H and the hole edge portion 17he overlap.
11A and 11B are views for explaining an example in which the hole edge portion 17he and the joint portion 50 are overlapped between the first sheet member and the second sheet member.

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

A side flap having a first waist portion, a crotch portion and a second waist portion side by side in a longitudinal direction and having a first sheet member and a second sheet member superimposed on each other, And a perforated line formed on the side of the second waist region of the side flap and having a plurality of holes extending through the first sheet member and the second sheet member, Wherein the member has a plurality of hole edge portions corresponding to the plurality of holes, each of the hole edge portions includes a joining portion that joins the first sheet member and the second sheet member which are overlapped with each other along the periphery of each hole, Wherein at least one of the perforations of the perforated edge portion of the diaper is not overlapped.

According to such a disposable diaper, the plurality of holes constituting the perforated line are hardly punctured, and the respective perforations are less visible, so that the perforated lines formed on the diaper can be made less conspicuous.

The disposable diaper according to any one of claims 1 to 3, further comprising: a third sheet member that overlaps with the first sheet member on a surface opposite to the second sheet member, and at least one of the plurality of hole edge portions has a hole edge portion, And the joining portion joining the first sheet member and the second sheet member and the joining portion joining the first sheet member and the third sheet member.

According to this disposable diaper, even when a force for pulling the sheet member in the transverse direction acts on the perforated line formed in the overlapping portion of the three sheet members, the enlargement of the perforations constituting the perforated line becomes difficult to visually recognize. As a result, the perforated line can be made less conspicuous.

The disposable diaper according to any one of claims 1 to 3, further comprising: a third sheet member that overlaps with the first sheet member on a surface opposite to the second sheet member, and at least one of the plurality of hole edge portions has a hole edge portion, Overlapping with the joining portion joining the second sheet member and the joining portion joining the first sheet member and the third sheet member.

According to such a disposable diaper, when a force for pulling the sheet member in the transverse direction is applied to a perforated line formed in a portion where three sheet members are superimposed, when viewed from the side of the second sheet member, And the enlargement of the hole becomes difficult to see when viewed from the third sheet member side. This makes it possible to form a perforated line which is hard to be seen from one side (outer side) of the diaper and is easy to see from the other side (inner side).

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

According to this disposable diaper, since the outer edge (edge) of the hole can be made hard to be visually recognized by the fine fibers arranged on the surface of the nonwoven fabric, the perforated line can be made less conspicuous.

As such a disposable diaper, it is preferable that the abutment portion is formed by spirally applying a hot-melt adhesive agent 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 material joining the sheet member, so that the cost can be reduced. Further, since the unit weight of the hot-melt adhesive applied to the sheet member is reduced, it is possible to suppress the hardening of the sheet member by the hot-melt adhesive material, and the touch of the diaper 1 can be maintained smoothly. Further, as compared with the case where the hot-melt adhesive material is applied in the form of a strip, it is possible to make it difficult for the hole edge portion and the joint portion to overlap with each other, so that the perforated line can be made less conspicuous.

Wherein a ratio of the perforations per unit length in a direction in which the perforated line extends in a region corresponding to an area in which the fastening tape is arranged in the longitudinal direction is larger than a ratio of the perforations in the longitudinal direction, Is smaller than the ratio of the hole occupied per unit length in the direction in which the perforated line extends.

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

The disposable diaper according to any one of claims 1 to 5, wherein the fastening tape is joined to the first waist portion, respectively, so that one waist-opening and a pair of leg-openings are formed, It is preferable to lie on a route extending from the portion to be the waist-hole opening portion to the portion to be the leg-hole opening portion.

According to this disposable diaper, even when the wearer of the diaper takes a prone position (positioning posture), the portion to which the fastening tape is connected is cut along the perforated line, so that the diaper can be removed without moving the body of the wearer as much as possible .

The disposable diaper according to any one of the preceding claims, wherein the perforated line has a straight portion extending in the longitudinal direction from a portion serving as the waist-hole and a curved portion curved outward in the transverse direction at a position inside the longitudinal direction Section.

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

The disposable diaper according to any one of claims 1 to 3, wherein the diaper is formed at the first waist region side of the side flap, and at the same position as the perforation line with respect to the transverse position, It is preferable to provide a cutting line arranged in a line.

According to this disposable diaper, when the diaper is worn, the back of the diaper can be torn along the cutting line. By folding the torn portion with the folded portion, the abdomen of the wearer can be exposed while the diaper is worn. Particularly, when the wearer is a low birth weight child and it is necessary to perform light treatment or the like, it is possible to irradiate a wide range of the exposed abdominal region while suppressing the contact of the low birth weight child with the body to a minimum.

=== Embodiment ===

<Basic configuration of the disposable diaper 1>

The disposable diaper 1 of the present embodiment (hereinafter, simply referred to as a diaper 1) is a disposable diaper mainly used for a newborn baby or an infant, and is a low-weight diaper having a body weight of 3000 g or less, It is suitable for low birth weight infants. On the other hand, low birth weight infants include not only low birth weight infants (less than 2500 g body weight) but also very low birth weight infants (less than 1500 g body weight) and ultra low birth weight infants (body weight less than 1000 g).

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

1, the diaper 1 of the present embodiment is a so-called open type disposable diaper. The diaper 1 includes a first waist portion 3, a crotch portion 5, a second waist portion 7 ). The first waist portion 3 is a portion located on the front portion (back side, front waist side) of the wearer. In addition, the second waist portion 7 is a portion located on the back portion (back side, rear waist side) of the wearer. However, it is also possible to wear the diaper 1 with the first waist portion 3 on the back of the wearer and the second waist portion 7 on the back of the wearer. The first waist portion 3 is also referred to as a front portion 3 and the second waist portion 7 is also referred to as a rear portion 7 for the sake of convenience.

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 referred to as "longitudinal direction", and the direction perpendicular to the longitudinal direction is referred to as "horizontal direction". On the other hand, the longitudinal direction is the direction along the product longitudinal direction, and the transverse direction is the direction along the product width direction. As shown in Fig. 2, the direction perpendicular to the longitudinal direction and the transverse direction is referred to as a &quot; thickness direction &quot;, and the skin side of the wearer is referred to as &quot; skin side &quot;

The diaper 1 has a center band-shaped region 12, a side flap 14, and a leg side gathers 16. A fastening tape 30 is attached to the pair of side flaps 14, respectively. By fastening the fastening tape to the first waist portion, one waist-hole opening and a pair of leg-openings are formed.

The center band-shaped region 12 is a band-shaped region located at the center in the transverse direction constituted by the front portion 3, the crotch portion 5 and the rear portion 7 (see Fig. 1). The center band-shaped region 12 is a region for absorbing and holding liquid such as urine discharged by a wearer. The center band-shaped region 12 has a vertically elongated shape (shape along the longitudinal direction) including the liquid retaining absorber 21. The center strip-shaped region 12 mainly has an absorbent body 21, a top sheet 22, a leakage preventing 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 excretion such as urine and is disposed over the front part 3, the crotch part 5 and the rear part 7. [ A region indicated by a halftone dot portion in FIG. 1 indicates an area occupied by the absorber 21. The absorber 21 has an hourglass shape such that the width at the central portion in the longitudinal 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. The absorber 21 may be formed at least on the crotch part 5. The absorber 21 is sandwiched between the topsheet 22 and the leak-barrier sheet 23. As the liquid absorbent material constituting the absorbent body 21, for example, liquid absorbent fibers such as pulp fibers and liquid absorbent granular materials such as super absorbent polymers can be used. In addition, the liquid absorbent material may include a liquid absorbent material other than the liquid absorbent fiber and the liquid absorbent granular material.

CL shown in Fig. 1 is a line indicating the center of the diaper 1 in the longitudinal direction. In the diaper 1, the position of the crotch part 5 is set so that the central part of the wearer's crotch part coincides with the center part of the crotch part 5. [ The central portion of the wearer's groin refers to the central position of the portion to which the leg is attached and is shifted to the front side from the center position CL of the diaper 1 in the longitudinal direction (see Fig. 1). The wearer can easily move the legs to the front side (rear side) and the back side of the diaper 1 By making the area of the portion 7 relatively wide, the buttocks of the wearer can be reliably covered.

The topsheet 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 preventing sheet 23 is a liquid impermeable member disposed on the non-skin side of the absorbent body 21, and is made of, for example, a film sheet. On the non-skin side of the leak-barrier sheet 23, a back sheet 24 is disposed (see Figs. 2A to 2C). The backsheet 24 is a member (outer sheet) constituting the outer skin of the diaper 1 on the non-skin side, and is made of, for example, a nonwoven fabric.

The side flaps 14 are portions located on both side portions in the transverse direction of the center band-shaped region 12. The side flaps 14 are formed across the front portion 3, the crotch portion 5 and the rear portion 7 (see Fig. 1). The width (width) of the side flap 14 in the transverse direction in the crotch part 5 is equal to the length (width) in the transverse direction of the side flap 14 in the front part 3 and the rear part 7, It is narrower. The length (width) in the lateral direction of the rear portion 7 of the side flap 14 is longer than the length (width) in the lateral direction of the front portion 3 of the side flap 14 (See FIG. 1). A leg gathers 15 (leg-opening stretchable and contractible portions) extending and contracting along the longitudinal direction are formed on both sides of the pair of side flaps 14 in the transverse direction.

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 member on the skin side 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 (solid gathers), and is a region outside the skin side sheet 26 (a region outside the joining portion 26A shown by the broken line in Fig. 1 ) Constitute the side flap (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 &quot; HMA &quot;). In the area of a part 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).

Between the skin side sheet 26 of the side flap 14 and the back sheet 24, an elastic member 27 is disposed. The elastic member 27 is a thread-like member that extends and contracts along the longitudinal direction, and is a member that imparts elasticity to the leg-openings when the diaper 1 is worn. That is, the elastic member 27 is a leg-surrounding elastic member that fits the leg-surrounding portion of the diaper 1 to fit the leg of the wearer. The elastic members 27 impart stretchability to the skin side sheet 26 and the back sheet 24 of the crotch part 5 to form the leg gathers 15. [ 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 these, but can be appropriately adjusted. The elastic member 27 is made of, for example, a thread rubber.

The leg side gathers 16 are steric gathers for preventing liquid leakage from the gap around the legs. A pair of leg side gathers 16 are formed along the longitudinal 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 center strip-shaped region 12 from the inside of the side flaps 14.

The leg side gathers 16 are mainly composed of the inner side portions of the skin side sheet 26 (see Fig. 2). The inner edge of the skin side sheet 26 of the crotch part 5 has elasticity by a rubber rubber or the like. The skin side sheet 26 is bonded along the longitudinal direction at the joining portion 26A between the center band-shaped region 12 and the side flap 14 (broken line portion in Fig. 1). The region on the inner side of the joining portion 26A of the skin side sheet 26 constitutes the leg side gathers 16 (steric gathers) with the joining portion 26A as a fulcrum.

The fastening tape 30 is attached to the side flap 14 of the rear portion 7 (see Fig. 1). 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 so that the fastening tape 30 is joined have.

On the front portion 3 of the diaper 1, a target tape 29 is provided (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 engageable with 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 joined. On the other hand, instead of disposing the target tape 29 on the non-skin side of the back sheet 24, the target area may be formed on the outermost nonwoven fabric of the back sheet 24. By fastening the fastening tape 30 to the target tape 29, the diaper 1 is worn.

A perforated line 17 shown by the thick dotted line in Fig. 1 is formed on the side of the rear portion 7 of the side flap 14, i.e., on the side where the fastening tape 30 of the side flap 14 is joined. Details of the perforated line 17 will be described later.

The length of the product in the longitudinal direction of the diaper 1 for a low-body-weight child of the present embodiment (the dimension in a state in which the product is stretched without wrinkles in the longitudinal direction) is in the range of 210 to 330 mm. For example, the product length of the low birth weight infant diaper 1 having a body weight of less than 2500 g is 310 mm, the product length of the ultra low birth weight infant diaper 1 having a body weight of less than 1500 g is 270 mm, g in the case of the ultra low birth weight infant diaper 1 is 230 mm.

In addition, the waist size of the diaper 1 for a low birth weight infant of the present embodiment is in the range of 160 to 295 mm. On the other hand, the waist size is the same as that in the state in which the end of one fastening tape 30 is aligned with the end on the side flap 14 side of the hook sheet area C of the other fastening tape 30, Is a dimension in a state where it is stretched. That is, it is the dimension in a state in which the product is stretched in the width direction. For example, the waist size of the diaper 1 for a low birth weight infant is 273.5 mm, and the waist size for a very low birth weight infant diaper 1 having a weight of less than 1500 g is 220 mm.

<About Removing the Diaper 1>

Next, a method for attaching and detaching the diaper 1 will be described. 1, the rear portion 7 of the central band-shaped region 12 is positioned on the back side of the wearer and the back side portion 3 of the diaper 1 is worn on the wearer's side. Is arranged along the back of the wearer. The fastening tape 30 is engaged with the target tape 29 provided on the front portion 3 by winding the rear portion 7 of the side flap 14 from the back side of the wearer toward the back side in the waist circumferential direction.

3 is a view showing a state in which the diaper 1 is worn by a low birth weight infant. As described above, the diaper 1 of the present embodiment is intended to be worn mainly on a low-body-weight baby. When the wearer is a low birthweight child, especially when the wearer is for a very low birth weight child (less than 1500 g body weight) or a very low birth weight child (body weight less than 1000 g body weight), avoid touching the body as much as possible, May be required. Therefore, after the diaper 1 is worn by a low-birth-weight baby, the back of the diaper 1 is curled in a C-shape as shown in Fig. 3, and the legs are strongly bent in an M- desirable. The posture shown in Fig. 3 is an attitude that is close to a fetal posture (a bending posture such as a fetus) in the mother and is a posture that is easy to stabilize, and is also called a &quot; posturing posture &quot;.

When peeling the diaper 1 from the wearer's body, the fastening tape 30 attached to the target tape 29 is peeled off and the diaper 1 is unfolded in the reverse order to that of the wearer. However, when the wearer takes the positioning posture shown in Fig. 3, the fastening tape 30 is hidden behind the wearer. Therefore, in order to remove the fastening tape 30, the back of the wearer must be brought into a state in which the wearer's body is once turned upward, but moving the wearer's body only to peel off the diaper 1, Handling &quot; in &lt; / RTI &gt; Thus, in the diaper 1, a perforated line 17 is formed in the side flap 14 so that the diaper 1 can be removed without moving the wearer's body.

Fig. 4 is a view showing a state when the diaper 1 is removed from the wearer's body. When the diaper 1 is peeled off, the side flaps 14 are torn along the perforated lines 17 from the waist opening to the leg opening. Thus, the diaper 1 can be removed from the wearer's body while the fastening tape 30 is engaged with the target tape 29 on the back side. That is, as shown in Fig. 4, a portion to which the fastening tape 30 is connected is separated from the side flap 14 at both lateral ends of the diaper 1, and the diaper 1 is opened , The diaper 1 can be easily removed without changing the posture of the wearer (low birth weight infant).

<Structure of perforated line>

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

Figs. 5A and 5B are views for explaining the structure of the perforated line 17 of the diaper 1. Fig. The perforations 17 of the present embodiment are formed on the side of the back 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 And is stretched on a root extending from the trunk circumference opening to the leg-hole opening, thereby forming a seam-like portion. The plurality of holes 17h penetrate the skin side sheet 26, the back sheet 24 and the leakage preventing sheet 23 in the thickness direction in the region of the skin flap 14, Fig. 5A shows an example in which the hole 17h is circular, and Fig. 5B shows an example in which the hole 17h is elliptical. On the other hand, the shape of the hole 17h may be other than this, for example, a rectangular slit or the like may be used. The size of the hole 17h (diameter of the opening) is determined by the size of the diaper 1 and the material of the base material constituting the diaper such as the skin side sheet 26 and the like.

5A and 5B, the region of the rear portion 7 in the longitudinal direction of the diaper 1 is divided into three regions of the rear portion 7a, the rear portion 7b, and the 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 longitudinal direction and the rear portion 7a is a region formed in the rear side And the rear portion 7c is an area on the front side (inward in the longitudinal direction) than the rear portion 7b. The plurality of holes 17h of the perforated line 17 are formed along the joining portion 26A between the center strip region 12 and the side flap 14 in the region of the rear portion 7a and the rear portion 7b Thereby forming straight portions linearly arranged in the longitudinal direction. The plurality of holes 17h form a curved portion lined up so as to curl toward the leg-openings of the lateral end of the diaper 1 in the region of the rear portion 7c. As described above, the perforated line 17 has a straight portion and a curved portion, so that the side flap 14 can be easily cut even when the diaper 1 is worn. For example, when the wearer of the diaper 1 takes a positioning posture as shown in Fig. 3, since the wearer's leg is bent in an M-shape and is located on the front side of the body, the leg- . In this state, when the side flap 14 is to be torn from the waist-hole opening to the leg-hole opening, it is necessary to cut the side flap 14 obliquely along the direction in which the leg is bent. On the other hand, in the diaper 1 of the present embodiment, the perforated line 17 is curved toward the leg-opening portion, whereby the side flap 14 is torn along the perforated line 17, so that when the wearer is in the positioning posture It is possible to separate the portion of the fastening tape 30 simply.

In addition, the intervals (pitches) of the holes 17h adjacent to each other on the perforated line 17 are different for each region. The distance Lhb from the outer circumferential edge of a certain hole 17h to the outer circumferential edge of the adjacent hole 17h in the region of the rear portion 7b is equal to the distance Lhb between the rear region 7a and the rear region 7c (Lhb > Lha) from the outer circumferential edge of a certain hole 17h to the outer circumferential edge of the adjacent hole 17h. In other words, the ratio of the hole 17h occupied per unit length on the perforated line 17 in the region of the rear portion 7b is set such that the unit of the hole 17h in the region of the rear portion 7a and the rear portion 7c is the unit Is smaller than the ratio of the holes 17h occupying per length. That is, in the region of the rear portion 7b, the ratio of the holes penetrating through the skin side sheet 26 and the back sheet 24 is small. Therefore, compared with the region of the rear portion 7a and the rear portion 7c, So that it is difficult to cut out the base 14. This is because when the fastening tape 30 is stretched in the transverse direction at the time of wearing the diaper 1, the lateral flap 14 is cut off due to the force exerted in the transverse direction outside the region of the rear portion 7b In order to suppress them. Conversely, when the diaper 1 is to be removed, in the region of the rear portion 7a, which is the cut-off start portion, and the rear portion 7c, where the perforated line 17 is curved, It is easy to cut out the base 14. This makes it possible to prevent the side flap 14 from being cut off accidentally when the diaper 1 is worn and to easily remove the side flap 14 along the perforated line 17 when removing the diaper 1. [ You can cut it.

<About appearance of perforated line>

The perforated line 17 is disposed at a position where the side of the wearer is easily visible when the diaper 1 is worn. When the diaper 1 is worn, since the side flap 14 is stretched in the lateral direction, a force acting in the lateral direction acts on the hole 17h constituting the perforated line 17, The hole 17 of the light emitting diode 10 becomes easy to be widened, and it becomes apparent that the light emitting diode 10 becomes apparent. Particularly, when the wearer is a low-weighted child and takes a positioning posture as shown in Fig. 3, lateral force is likely to be applied to the joint portion of the fastening tape 30 as compared with the case of the upward posture , The hole 17h formed in a seam shape may be excessively emphasized. If the hole 17h is excessively visible, the user is given the impression that the diaper 1 is punctured, and whether or not the excretion leaks from the portion of the hole 17h to the outside of the diaper 1 There is a fear that it will cause uneasiness. In addition, there is a possibility that the diaper 1 may be torn off from the hole 17h, which may interfere with the use of the diaper 1 at ease.

In the diaper 1 of this embodiment, the hole 17h of the perforated line 17 is made less conspicuous even when a lateral force acts on the side flap 14. [

Fig. 6 is an enlarged view of the area of the rear portion 7b of Fig. 5A. Fig. 7 is a view showing a section B-B in Fig. 6; Fig. 6 and 7, the hole 17 is shown as a circle having a diameter D1, but the shape of the hole may be other than a circle. In Figs. 6 and 7, the opening 17 formed in the skin side sheet 26, the leakage preventing sheet 23, and the back sheet 24 has a predetermined width along the outer periphery (outer edge portion) The hole edge portion 17he is set in the region having the hole edge portion 17e. 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 17 to the outer peripheral portion of the hole edge portion 17he is , For example, 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.

Between the first sheet member and the second sheet member, there is formed a region H to be bonded to which the both sheets are joined. 6 and 7 are the area H to be bonded, and in the present embodiment, the region H to be bonded is formed in the area on both lateral sides of the perforated line 17 in the longitudinal direction . The joining portion 50 joining the two sheet members to each other is formed by applying an adhesive such as hot melt adhesive (HMA) to a predetermined area in the joining target area H between the two sheet members superimposed in the thickness direction . Similarly, between the first sheet member and the third sheet member, a joining area H for joining both sheets is formed, and a joining part 50 is formed in the joining area H.

In Figs. 6 and 7, HMA is applied to all areas of the area H to be bonded with respect to at least one sheet member of the first sheet member and the second sheet member. That is, the joining portion 50 is formed in a substantially rectangular band shape along the longitudinal direction within the range equivalent to the joining area H. In the present specification, such an HMA application pattern is referred to as a &quot; coater pattern &quot;. In the coater pattern, two sheet members can be strongly bonded together, and it is suitable for the case where it is desired to secure the bonding strength. However, the shape of the joint portion 50 is not limited to the coater pattern, and it is possible to form the joint portion 50 in various patterns other than the coater pattern by changing the application pattern of the HMA within the range of the region H to be bonded .

8A to 8B are views showing examples of other patterns of the joining portion 50. Fig. Fig. 8A shows an example in which the HMA is spirally coated in the range of the region to be bonded (H). In the present specification, such a coating pattern is called a &quot; spiral pattern &quot;. In the joint portion 50 formed by the spiral pattern, it is possible to reduce the amount of HMA to be used in comparison with the coater pattern. Further, since the unit weight of the HMA in the region H to be bonded is reduced, the stiffness of the sheet is suppressed by the HMA, and the soft touch of the diaper 1 in the region H to be joined can be maintained smoothly . Fig. 8B shows an example of a case where the HMA is applied in a serpentine manner along the longitudinal direction within the range of the area to be bonded (H). In the present specification, such a coating pattern is referred to as an &quot; omega pattern &quot;. In the joint portion 50 formed by the omega pattern, the amount of HMA to be used can be reduced similarly to the spiral pattern, and the touch of the region H to be bonded can be made smooth.

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 transverse direction. In other words, between the first sheet member (leakage preventing sheet 23) and the second sheet member (skin side sheet 26), and between the first sheet member (leakage preventing sheet 23) and the third sheet member Sheet 24), the hole edge portion 17he is not bonded. Thereby, even when the side flaps 14 are stretched in the transverse direction, the holes 17h of the perforated lines 17 can be made less conspicuous.

Fig. 9 is a view for explaining the shape of the hole 17h when a force in the transverse direction acts in Fig. 7. Fig. In the case where a force for pulling the side flap 14 in the transverse direction is applied, as shown in Fig. 9, the shear direction deviates from each of the first to third sheet members. At the same time, a force acts on the hole 17h formed in each sheet member in the direction of widening the diameter of the opening, and the diameter of the hole 17h shown by D1 in Fig. 7 is widened to D2 in Fig. 9 (D2 > D1).

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 not bonded to each other, The lateral positions of the holes 17h in the sheet member are offset from each other. Similarly, the lateral positions of the holes 17h are also offset from each other between the first sheet member and the third sheet member. As a result, the diameter D3 of the region passing through the third sheet member in the thickness direction from the first sheet member in the hole 17h becomes narrower than D2 (D2 > D3). Therefore, even if the diameter of the hole 17h is increased to D2 by stretching the side flap 14 in the transverse direction, the diameter of the portion actually seen through is D3, and the hole 17h is apparently widened It does not seem to be. On the other hand, Fig. 9 shows a case where an even force acts in the lateral direction with respect to the first to third sheet members. In fact, when the side flaps 14 are stretched in the transverse direction, the forces acting on the sheet members are often uneven, and the displacement amounts of the positions of the holes 17h in the transverse direction are different, ) Becomes more difficult to notice. As a result, the perforated line 17 becomes less conspicuous, making it less likely to give the user anxiety.

On the other hand, in the diaper 1, the skin side sheet 26 and the back sheet 24 located on both outer sides in the thickness direction are made of nonwoven fabric. Generally, since fine fibers are entangled on the surface of the nonwoven fabric, the surface of the nonwoven fabric is in the same state as that of the surface of the nonwoven fabric. The outer edge (edge) of the hole 17h is in contact with the eye 17a because the napkin 17he of the hole 17h formed in the skin side sheet 26 and the back sheet 24 is also in the state of napping. It is becoming difficult to obtain. As described above, among the sheet members overlapping a plurality of sheets, the sheet member (the second sheet member and the third sheet member in the above example) disposed outside is made of a nonwoven fabric or the like to make the hole 17h harder to stand out .

6 and 7, the joining area H is formed at a position spaced apart from the hole edge 17he. However, the joining part 50 and the hole edge 17he are not overlapped in the horizontal direction The area to be bonded H may be set so as to overlap with the hole edge portion 17he. Fig. 10 is a view for explaining an example of a case where the area to be bonded H and the hole edge portion 17he overlap. In Fig. 10, the joint portion 50 is formed by an omega pattern (or a spiral pattern) in the region H to be bonded. In this case, of the five holes of the holes 17h1 to 17h5 shown in Fig. 10, at least the hole edge portion 17he and the joint portion 50 are not overlapped in the hole 17h3. Therefore, even when the side flaps 14 are stretched in the transverse direction, as shown in Fig. 9, the opening 17h3 does not appear to have a wider diameter in the hole 17h3, It is possible to make it difficult.

As described above, in the present embodiment, the joining portion 50 joining the overlapped sheet members together and at least one hole edge portion 17he of the plurality of hole edge portions 17he are not overlapped. As a result, the hole 17h passing through the sheet member becomes difficult to visually recognize, and the perforated line 17 becomes less conspicuous.

<Modifications>

In the embodiment described above, the hole edge portion 17he and the joint portion 50 are not overlapped with each other for each of the first to third sheet members. However, It is possible to make the perforated line 17 less conspicuous in the portion where the hole edge portion 17he and the joining portion 50 are not overlapped.

11A and 11B are views for explaining an example in which the hole edge portion 17he and the joint portion 50 are overlapped between the first sheet member and the second sheet member. 11A, the hole edge portion 17he and the joint portion 50 are not overlapped between the first sheet member (the leakage preventing sheet 23) and the third sheet member (the back sheet 24) The hole edge portion 17he and the joint portion 50 are overlapped between one sheet member (leakage preventing sheet 23) and the second sheet member (skin side sheet 26). Fig. 11B shows a case in which a lateral force acts on the sheet member in the state of Fig. 11A. In this case, as shown in Fig. 9, a large deviation occurs 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 portions 17he, which are the outer edge portions of the holes 17h, are bonded to each other between the first sheet and the second sheet, the amount of displacement of the holes 17h in the lateral direction is small, This is easy to see. That is, when viewed from the non-skin side (back sheet 24 side) of the diaper 1, the perforated lines 17 are hardly noticeable. However, when viewed from the skin side (skin side sheet 26 side) of the diaper 1 The perforated line 17 becomes more conspicuous.

According to the modified example, it is possible to configure the diaper 1 that is difficult to see the perforated line 17 from the outside (non-skin side) and the perforated line 17 is easy to see from the inside (skin side). With this configuration, when the diaper 1 is peeled off, the position of the perforated line 17 can be easily grasped by checking the inside of the side flap 14 by lifting up the side flap 14. Therefore, it is possible to make the perforated line 17 difficult to be recognized visually, and to easily recognize the position of the perforated line 17 from the inside.

Conversely, while the hole edge portion 17he and the joint portion 50 are overlapped between the first sheet member (the leakage preventing sheet 23) and the third sheet member (the back sheet 24) The hole edge portion 17he and the joint portion 50 may not be overlapped between the first sheet member (the leakage preventing sheet 23) and the second sheet member (the skin side sheet 26).

In the above-described embodiment, the perforated line 17 penetrating the three sheet members has been described. However, the same effect can be obtained even when the perforated line 17 passes through the 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 divided into a skin side sheet 26 (referred to as a first sheet member) and a back sheet 24 The sheet member of the two sheets passes through the overlapped portion. That is, a hole 17h is formed in a portion where the leakage preventing sheet 23 is not present. In this case, too, at least one of the plurality of hole edge portions 17he is not overlapped with the joining portion 50 joining the first sheet member and the second sheet member, so that the enlargement of the hole 17h So that the perforated line 17 can be made less conspicuous.

=== Other ===

The above-described embodiment is for facilitating understanding of the present invention, and is not for limiting 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 its equivalents.

In the above-described embodiment, the perforated line 17 is formed on the side of the rear portion 7 of the diaper 1. However, the perforated line may be formed on the other portion. 1, a cutting line 19, which is a kind of perforation line, is formed along the longitudinal direction from the longitudinal end of the side flap 14 on the front portion 3 side. The cutting line 19 is constituted by a plurality of holes 19h passing through the sheet member such as the skin side sheet 26 like the perforated line 17 and the outer peripheral edge of the hole 19h, (Not shown in Fig. 1) is formed. The cutting line 19 can be made less noticeable as in the case of the perforated line 17 by preventing the joining portion 50 joining the two sheets of overlapping sheets from overlapping the perforated edge portion 19he .

Since the cutting line 19 is formed on the front portion 3 of the diaper 1, that is, on the side of the waist portion (first waist portion 3) on the back side, when the diaper 1 is worn, The rear side of the diaper 1 along the line 19 is easily torn. By folding the torn portion with the folded portion, the abdomen of the wearer can be exposed while the diaper 1 is worn. When the wearer of the diaper 1 is a low birth weight infant, it is preferable to irradiate light over a wide range of the body when performing the light ray treatment or the like. In this case, by folding the abdomen side of the diaper 1 along the cutting line 19, it is possible to irradiate a wide range of the abdominal region with light while suppressing the contact of the underweight baby with the body to a minimum. Further, since the cutting line 19 is formed at the position shown in Fig. 1, the first waist portion 3 of the diaper 1 starts to follow the rounded shape of the wearer's abdomen with the cutting line 19 as a starting point It is easy to bend, and the fit feeling of the diaper 1 can be improved.

On the other hand, the perforated line 17 and the cut line 19 are formed at substantially the same position in the transverse direction of the diaper 1 in the unfolded state (see Fig. 1). When the diaper 1 is manufactured, the sheet members in the state shown in Fig. That is, the diaper 1 is transported in the longitudinal direction with its front end in the expanded state and the longitudinal rear end of the diaper 1 different from the rear end connected. In the conveying process, the cutting line 19 and the perforated line 17 are continuously formed by punching a plurality of holes along the longitudinal direction so as to extend over the connected portion. That is, since the cutting line 19 can be formed at the same time in the step of forming the perforated line 17, there is no problem such as an increase in the manufacturing cost of the diaper 1.

Further, the diaper 1 may have the following aspects.

(Mode 1)

The leg-surrounding elastic members are provided along the longitudinal direction to shrink the portion to be the leg-openings in the longitudinal direction at respective positions on both sides in the transverse direction, and the curved portions of the perforated lines are virtually provided on the waist- And the leg-surrounding elastic member is divided into two parts, that is, a portion of the leg-hole-side opening portion and a portion of the leg-opening-side opening portion. Of the diaper.

(Mode 2)

Wherein the number of sheets of the sheet member in at least a part of the curved portion of the perforated line is smaller than the number of sheets of the sheet member in the straight portion of the perforated line, diaper.

(Mode 3)

Characterized in that the stretching direction at the time of manufacture has a resin film (leakage preventing sheet) along the longitudinal direction, and the straight portion of the perforated line (17) is formed on the resin film.

(Mode 4)

Shaped straddle gathers (leg side gathers) formed along the longitudinal direction at respective positions on both sides in the transverse direction, and the straddle gathers forming portion includes a base end portion that can not stand in the thickness direction, The upstanding portion contracts in the longitudinal direction on the basis of the contracting force in the longitudinal direction acting on the upstanding portion so that the upstanding portion comes into contact with the skin side in the thickness direction And the perforated line is formed at a position outside the proximal end portion and the proximal end portion in the transverse direction.

(Mode 5)

(Absorber) formed by laminating a liquid absorbent material absorbing liquid in the thickness direction in a center in the transverse direction, and the perforated line is formed at a position outside the absorbent core in the transverse direction Features disposable diapers.

1: disposable diaper (diaper) 3: front portion (first waist portion)
5: crotch part 7: rear part (second waist circumference part)
12: center strip region 14: side flap
15: leg gathers 16: leg side gathers
17: perforated line 17h: hole
17h1 to 17h5: hole 17he: hole edge portion
19: cutting line 19h: hole
19he: hole edge portion 21: absorber
22: top sheet 23: leakage preventing sheet
24: back sheet (outer sheet) 26: skin side sheet
27: elastic member 29: target tape
30: fastening tape 50:
H: area to be bonded HMA: hot melt adhesive

Claims (9)

The first waist portion, the crotch portion and the second waist portion are arranged side by side in the longitudinal direction,
A side flap in which the first sheet member and the second sheet member are overlapped,
A fastening tape joined to the side of the second waist of the side flap,
And a plurality of perforations formed in the second waist region of the side flap and extending through the first sheet member and the second sheet member,
The diaper according to claim 1,
Wherein the first sheet member has a plurality of hole edge portions corresponding to the plurality of holes and each of the hole edge portions extends along an outer periphery of each hole,
A joining portion joining the first sheet member and the second sheet member overlapping each other, and a joining portion joining at least one hole edge portion of the plurality of hole edge portions
Wherein the disposable diaper is a disposable diaper. The method according to claim 1,
And a third sheet member overlapping 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 may be formed by a joining portion joining the first sheet member and the second sheet member and a joining portion joining the first sheet member and the third sheet member Features disposable diapers. The method according to claim 1,
And a third sheet member overlapping the first sheet member on a surface opposite to the second sheet member,
Wherein at least one hole edge portion of the plurality of hole edge portions overlaps with a joining portion joining the first sheet member and the second sheet member and has a joining portion joining the first sheet member and the third sheet member, Wherein the diaper is made of a synthetic resin. The method according to claim 2 or 3,
Wherein at least one of the first sheet member and the third sheet member is formed by a nonwoven fabric. 5. The method according to any one of claims 1 to 4,
Wherein the joining portion is formed by spirally applying a hot-melt adhesive to at least one of the first sheet member and the second sheet member. 6. The method according to any one of claims 1 to 5,
Wherein the ratio of the perforations occupied per unit length in the direction in which the perforated lines extend, of the areas corresponding to the areas where the fastening tapes are arranged in the longitudinal direction,
Is smaller than a ratio of the perforations per unit length in a direction in which the perforated line extends, in a region corresponding to an area where the fastening tape is not arranged in the longitudinal direction. 7. The method according to any one of claims 1 to 6,
The fastening tapes are respectively coupled to the first waist portion to form one waist opening and a pair of leg-openings,
Wherein the plurality of holes included in the perforated line are arranged on a route extending from a portion to be the waist-hole opening portion to a portion to be the leg-hole opening portion. 8. The method of claim 7,
Wherein the perforated line includes a linear portion extending in the longitudinal direction from a portion serving as the waist-
A curved portion curved outward in the transverse direction at a position inside the longitudinal direction than the straight portion,
And a diaper. 9. The method according to any one of claims 1 to 8,
And a second sheet member which is provided on the side of the first waist region of the side flap and is positioned at the same position as the perforated line with respect to the transverse position, And a diaper.

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