JP7109279B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Conventionally, a belt-type disposable diaper is known as an absorbent article. In a belt-type disposable diaper, the belt is wrapped around the waist of the wearer to form a loop around the waist, thereby fixing the diaper (belt and main body) to the body of the wearer. For example, Patent Literature 1 discloses a belt-type disposable diaper in which an integral strip-shaped waist belt (10) is joined to one longitudinal end of a main body (4).

Japanese Patent Publication No. 2008-521458

When wearing a belt-type disposable diaper as in Patent Document 1, the belt portion is wrapped around the wearer's waist (around the waist), and the belt portions are overlapped in the thickness direction and fastened with a hook-and-loop fastener or the like. It is fixed to the waist of the wearer by engaging through the engaging member. However, a diaper having such a configuration is likely to be displaced in the vertical direction when worn. That is, since the belt portion is not vertically fixed around the waist of the wearer, the belt portion tends to slip downward when the wearer moves the body. In this case, as the belt part slips down, the body part (absorbent body) also slips down, creating gaps around the wearer's legs and groin, which makes urine leakage more likely to occur, and the fit deteriorates. There is a risk of
SUMMARY OF THE INVENTION The present invention has been made in view of the problems described above, and an object of the present invention is to provide a belt-type absorbent article that is less likely to be misaligned when worn and has good fitting properties. be.

The main invention for achieving the above object is
having a longitudinal direction, a width direction, and a thickness direction that intersect each other;
a body portion including a first waist portion located on one side in the longitudinal direction and a second waist portion located on the other side in the longitudinal direction;
In the width direction, a first belt portion joined to one side of the first waist portion, a second belt portion joined to the other side of the first waist portion,
An absorbent article having
The first belt portion is provided with a first engaging portion that engages the first belt portion with the non-skin side of the second belt portion when wearing the absorbent article,
When wearing the absorbent article, the second waist portion is engaged with the non-skin side of at least one of the first belt portion and the second belt portion that are engaged with each other. A second engaging portion is provided for fitting,
The first belt portion and the second belt portion are joined to the first waist portion so as to be inclined outward in the longitudinal direction from the inner side to the outer side in the width direction,
The first waist portion is provided with a waist elastic region that can expand and contract in the width direction,
In the longitudinal direction, the widthwise outer end of the first belt portion and the widthwise outer end of the second belt portion overlap with the waist elastic region. It is an absorbent article to be.

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

ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide a belt-type absorbent article that is less likely to be misaligned when worn and has good fitting properties.

FIG. 2 is a developed plan view and a cross-sectional view of the diaper 1. FIG. 2A to 2C are schematic perspective views explaining how to wear the diaper 1. FIG. 3 is an enlarged plan view for explaining the detailed configuration of the belt portion 20; FIG. It is a figure explaining an example at the time of packing the diaper 1. FIG. FIG. 11 is a developed plan view of a modification of the diaper 1;

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
A main body having a longitudinal direction, a width direction, and a thickness direction that intersect each other, and provided with a first waist portion located on one side in the longitudinal direction and a second waist portion located on the other side in the longitudinal direction. a first belt portion joined to one side of the first waist portion in the width direction; and a second belt portion joined to the other side of the first waist portion. The first belt portion is provided with a first engaging portion that engages the first belt portion with the non-skin side of the second belt portion when the absorbent article is worn. , the second waist portion has the second waist portion on the non-skin side of at least one of the first belt portion and the second belt portion in an engaged state when the absorbent article is worn; A second engaging portion for engagement is provided, and the first belt portion and the second belt portion are each inclined outward in the longitudinal direction from the inner side to the outer side in the width direction. 1. An absorbent article characterized by being joined to a waist portion.

According to such an absorbent article, when the absorbent article is put on, the main body is pulled on both sides in the width direction and upward in the vertical direction (outside in the longitudinal direction) by pulling up the belt portion obliquely upward. Further, since the belt part is wrapped obliquely from the dorsal side to the ventral side along the waist of the wearer, it becomes difficult for the belt to be displaced in the vertical direction. Moreover, the width of the belt portion at the portion where it intersects with the main body portion is widened, so that the main body portion can be easily pulled over a wider range, and the wearer's body is widely covered by the main body portion. As a result, it is possible to make it difficult for misalignment to occur during wearing, and to achieve a good fit.

In this absorbent article, the first waist portion is provided with a waist elastic region that is stretchable in the width direction, and in the longitudinal direction, the first belt portion and the second belt portion, It is desirable to have a portion that overlaps with the waist elastic region.

According to such an absorbent article, in the region where the belt portion and the waist elastic region overlap in the longitudinal direction, a force that pulls the belt portion outward in the width direction is likely to act on the waist elastic region. It becomes easier to stretch in the width direction. As a result, the stretching force of the waist elastic region efficiently acts on the wearer's dorsal waist, improving the fit of the absorbent article.

In this absorbent article, in the longitudinal direction, a portion where the widthwise outer end of the first belt portion and the widthwise outer end of the second belt portion overlap with the waist elastic region. It is desirable to have

According to such an absorbent article, when the width direction of the belt portion is grasped and pulled to both sides in the width direction, the force of pulling the belt portion outward in the width direction is more likely to act from the waist elastic region, and the waist elastic region It becomes easier to apply the stretching force to the wearer's dorsal waist.

In such an absorbent article, it is desirable that the first belt portion and the second belt portion and the waist elastic region have overlapping portions in the thickness direction.

According to such an absorbent article, the force that pulls the belt portion to both sides in the width direction directly acts on the waist elastic region, making it easier to stretch the waist elastic region in the width direction. As a result, the stretching force of the waist elastic region acts more efficiently on the wearer's dorsal waist, and the fit of the absorbent article at the first waist portion is further improved.

In this absorbent article, at least one of the first belt portion and the second belt portion includes a belt portion elastic region that is stretchable in the longitudinal direction of each of the first belt portion and the second belt portion. is provided.

According to such an absorbent article, the belt portion itself can be stretched in the width direction (the long side direction of the belt portion). can be made wider. In addition, even when the wearer moves the body while wearing the absorbent article, the belt portion is easily deformed according to the movement of the body, so that the fit can be further improved.

In this absorbent article, the belt portion elastic region provided in the first belt portion is closer to the one side end of the body portion than the outer end of the first belt portion in the width direction. and the belt elastic region provided in the second belt portion is positioned closer to the other end of the body portion than the outer end of the second belt portion in the width direction. It is desirable that the

According to such an absorbent article, since the belt elastic regions are provided in the vicinity of both widthwise ends of the main body, the belt easily expands and contracts in the widthwise direction even when the absorbent article is worn. Easy to improve fit. In addition, since the rigidity of the belt elastic region of the belt is lower than that of the other regions, the rigidity of the belt is reduced in regions near both widthwise ends of the main body that are likely to come into contact with the wearer's skin. This makes it possible to soften the touch when worn.

In this absorbent article, the first waist portion is provided with a waist elastic region that is stretchable in the width direction, and the stretching stress of the belt portion elastic region is greater than the stretching stress of the waist elastic region. Also high, it is desirable.

According to such an absorbent article, when the belt portion is pulled outward in the width direction when the absorbent article is worn, the waist elastic region first expands in the width direction, and then the belt portion elastic region expands in the width direction. It will grow. Therefore, the previously elongated waist elastic region can easily fit around the wearer's dorsal waist with appropriate stress, and the fit around the waist can be further improved.

In this absorbent article, on both sides of the main body in the width direction, elastic members around the legs that can be stretched along the longitudinal direction are provided, and in the width direction, the first belt portion and the It is desirable that the second belt portion and the leg-hole elastic member have overlapping portions.

According to such an absorbent article, when the belt portion is pulled obliquely upward, the leg-surrounding elastic member is pulled upward in conjunction with the belt portion, and stretches in the longitudinal direction, thereby stretching the wearer's leg. It is possible to further increase the adhesion of the leg openings in the rolling. As a result, gaps are less likely to occur between the leg openings of the absorbent article and the wearer's body (groin), making it easier to suppress side leakage of urine and the like.

In this absorbent article, it is desirable that the first belt portion and the second belt portion and the leg elastic members overlap in the thickness direction.

According to such an absorbent article, the force that pulls up the belt portion obliquely upward acts directly on the leg elastic members, making it easier to elongate the leg elastic members in the longitudinal direction. This makes it more difficult for gaps to form between the leg openings of the absorbent article and the wearer's body.

In this absorbent article, the first waist portion has a skin-side sheet and a non-skin-side sheet laminated in the thickness direction, and includes at least one of the first belt portion and the second belt portion. It is desirable that the part is joined while being sandwiched between the skin-side sheet and the non-skin-side sheet.

According to such an absorbent article, even if the belt portion is pulled obliquely upward with a strong force when worn, the joint between the belt portion and the body portion is less likely to come off. Therefore, the force that pulls the belt portion is firmly transmitted to the waist elastic region, the belt portion elastic region, the leg elastic members, etc., and each elastic region (elastic member) is appropriately stretched, thereby improving the absorbent article. It is possible to further improve fit.

The absorbent article has a pair of tape portions extending outward from both ends of the second waist portion in the width direction, and the second engaging portions are provided on the tape portions. Preferably, the pair of tape portions are joined to the second waist portion so as to be inclined outward in the longitudinal direction from the inner side in the width direction toward the outer side.

According to such an absorbent article, when the second waist portion is pulled up around the wearer's waist during wearing, the second engaging portion is engaged with the belt portion while grasping the tape portion and pulling it upward obliquely. can be made Therefore, by stretching the main body portion in the width direction and pulling it upward, the main body portion can be more easily fitted to the crotch portion of the wearer.

In this absorbent article, in a packed state, the first belt portion and the second belt are arranged such that the long side direction of the first belt portion and the long side direction of the second belt portion intersect each other. is preferably engaged by the first engaging portion.

According to such an absorbent article, the user can grasp at a glance that the first belt portion and the second belt portion are engaged so as to cross each other by the first engaging portion. can. In addition, since the engaging portion is easily recognizable, the user can unfold the absorbent article in the packed state without hesitation.

In this absorbent article, in the packed state, the smaller angle between the long side direction of the first engaging portion and the long side direction of the second belt portion is the first engaging portion. preferably smaller than the smaller angle between the long-side direction of the second belt portion and the short-side direction of the second belt portion.

According to such an absorbent article, the engaging length of the first engaging portion in the long side direction (belt longitudinal direction) of the second belt portion is increased, and the first belt portion and the second belt portion are engaged in the longitudinal direction of the belt. The engagement with the belt portion becomes difficult to come off. Therefore, when the user takes out the absorbent article from the package, the engagement of the belt portion is prevented from spontaneously coming off.

===Embodiment===
As an absorbent article according to the present embodiment, a belt-type disposable diaper 1 (hereinafter also simply referred to as diaper 1) will be described as an example.

<Basic configuration of diaper 1>
FIG. 1 is a developed plan view and a cross-sectional view of a diaper 1. FIG. 1 shows the "stretched state" of the diaper 1. As shown in FIG. The “stretched state” is a state in which the diaper 1 is stretched without wrinkles, and the dimensions of each member constituting the diaper 1 (for example, the body portion 10 and the belt portion 20, etc., which will be described later) are the same as the dimensions of the member itself. It is in a state of being stretched until it reaches a length close to that.

Moreover, as shown in FIG. 1, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction that intersect each other. One longitudinal side is referred to as the "dorsal side" or "rear side", and the other longitudinal side is referred to as the "abdominal side" or "front side". In addition, in the thickness direction, the side that comes into contact with the wearer's body when wearing the diaper 1 is defined as the "skin side", and the opposite side is defined as the "non-skin side".

The diaper 1 has a body portion 10 and a pair of belt portions 20 joined to one side of the body portion 10 in the longitudinal direction. Note that the pair of belt portions 20 may be joined to the other side of the main body portion 10 in the longitudinal direction. In addition, the belt portion 20 and the body portion 10 are provided with an engaging portion 50 that engages the members when the diaper 1 is put on.

(Body portion 10)
The body portion 10 is a substantially rectangular member having long sides along the longitudinal direction as shown in FIG. In addition, of the main body portion 10, the portion located around the back side waist of the wearer at the time of wearing at one end in the longitudinal direction is defined as a first waist portion 10b, and the other end in the longitudinal direction is at the time of wearing. A part positioned around the wearer's abdominal and dorsal waist is referred to as a second waist part 10f.

The absorbent body 11 has a liquid-absorbing absorbent core 11a and core wrap sheets 11b covering the absorbent core 11a from both sides in the thickness direction. The absorbent core 11a is a member that absorbs and retains excretions such as urine, and is made of liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP). The absorbent core 11a of this embodiment has a narrowed constricted portion 111 between the front end and the rear end in the longitudinal direction, and has a substantially hourglass shape in plan view as shown in FIG. have. The constricted portion 111 is a portion that is sandwiched between the legs of the wearer when wearing the diaper 1, and the narrow width of the constricted portion 111 makes it easier for the body portion 10 to fit the crotch portion of the wearer. ing. In addition, a plurality of low basis weight areas 115 having a lower basis weight than the surrounding areas are provided along the longitudinal direction in the central area in the width direction of the absorbent core 11a. When the diaper 1 is put on, the absorbent core 11a is bent and deformed starting from the low basis weight region 115, so that the absorber 11 naturally fits easily along the curved surface of the wearer's body.

The core wrap sheet 11b is made of tissue paper, for example, and is joined to the absorbent core 11a at the low basis weight region 115 . This prevents the absorbent core 11a from losing its shape while the diaper 1 is worn.

The center top sheet 12 is a liquid-permeable sheet, and is laminated on the skin side surface of the absorbent body 11 along the longitudinal direction at the central portion in the width direction. As the center top sheet 12 of this embodiment, for example, a hydrophilic spunbonded nonwoven fabric, a pointbonded nonwoven fabric, or the like is used. In the center top sheet 12, the outer edge 12eo is folded back inward in the width direction, and an LSG elastic member 15 such as a rubber thread is joined between the folded portions in the thickness direction while being stretched in the longitudinal direction. By doing so, the inner three-dimensional gather LSGi is formed. When the diaper 1 is put on, the LSGi contracts in the longitudinal direction and stands on the wearer's skin side based on the stretchability of the LSG elastic member 15, and functions as a leak-proof wall that suppresses the side leakage of the excretion part such as urine. .

The side top sheets 13 are hydrophobic sheets, and are arranged on both sides of the center top sheet 12 in the width direction and on the skin side in the thickness direction. As the side top sheet 13 of this embodiment, for example, a hydrophobic spunbond nonwoven fabric, an SMS nonwoven fabric, or the like is used. In the side top sheet 13, the inner ends 13ei are folded outward in the width direction, and LSG elastic members 16 such as rubber threads are joined in the longitudinal direction between the folded portions in the thickness direction. By being formed, the outer three-dimensional gathers LSGo are formed. When the diaper 1 is put on, the LSGo rises toward the wearer's skin while contracting in the longitudinal direction due to the stretchability of the LSG elastic member 16, and functions as a leak-proof wall together with the inner three-dimensional gather LSGi.

The back sheet 14 is a sheet member laminated on the non-skin side of the absorbent body 11, and has a two-layer structure of a liquid-impermeable sheet 14a and a hydrophobic sheet 14b arranged on the non-skin side. For example, a resin film or the like is used as the liquid-impermeable sheet 14a, and a flexible hydrophobic non-woven fabric or the like is used as the hydrophobic sheet 14b.

In addition, on both widthwise sides of the constricted portion 111 of the absorbent core 11a, between the side topsheet 13 and the backsheet 14 in the thickness direction, a plurality of leg elastic members 18 such as thread rubber are provided in the longitudinal direction. It is joined and fixed in an extended state. When the diaper 1 is put on, both sides in the width direction of the main body 10 contract in the longitudinal direction due to the elasticity exhibited by the leg elastic members 18 to function as leg gathers to fit around the wearer's legs. . In FIG. 1 , the regions in which the leg elastic members 18 exhibit elasticity in the longitudinal direction are indicated by dashed lines. good.

In addition, in the first waist portion 10b, a waist elastic member 19 is jointed and fixed between the center top sheet 12 (side top sheet 13) and the back sheet 14 in the thickness direction while being stretched in the width direction. Thereby, a waist elastic region 91 is formed. When the diaper 1 is put on, the first waist part 10b of the body part 10 shrinks in the width direction based on the stretchability of the waist elastic region 91, functions as a waist gather, and fits the wearer's waist. In this embodiment, the waist elastic region 91 is formed by arranging a plurality of rubber threads in parallel in the longitudinal direction, but the waist elastic region 91 may be formed by a planar elastic member such as a stretchable nonwoven fabric. . When a stretchable nonwoven fabric is used, a uniform stretching force tends to act over the entire waist elastic region 91, and the waist gathers can be fitted softly to the abdomen of the wearer.

(Belt portion 20)
In the width direction, the belt portion 20 is arranged on one side (left side in FIG. 1) of the first waist portion 10b and on the other side (right side in FIG. 1) of the first belt portion 20L. and a second belt portion 20R. Each belt portion 20L, 20R is a substantially rectangular sheet member having substantially the same size and shape, and in this embodiment, the length of the long side is approximately 440 mm and the length of the short side is approximately 90 mm. The belt portion 20 has a skin-side sheet 21 and a non-skin-side sheet 22 laminated on the non-skin side in the thickness direction of the skin-side sheet 21, and the two are joined together by a bonding material such as a hot-melt adhesive. It is formed by joining. As the skin-side sheet 21 and the non-skin-side sheet 22, for example, hydrophobic spunbond nonwoven fabric, air-through nonwoven fabric, SMS nonwoven fabric, other stretchable nonwoven fabric, and the like are used. Of these, the skin-side sheet 21 is in contact with the wearer's skin when the diaper 1 is put on, so it is preferable to add a lubricant in order to increase flexibility.

The belt portion 20 (the first belt portion 20L and the second belt portion 20R) is attached to the main body portion 10 in a state in which the inner end portions 20Lei and 20Rei in the width direction are sandwiched between the top sheets 12 and 13 and the back sheet . is fixed to the joint. They are arranged so as to incline from the inner side in the width direction toward the outer side in the longitudinal direction (dorsal side). That is, the belt portion 20 is joined to the main body portion 10 so that the long side direction of the belt portion 20 is inclined by a predetermined angle α with respect to the width direction of the diaper 1 .

In addition, between the inner end and the outer end in the width direction of the belt portion 20, there is provided a belt portion elastic region 92 that can stretch along the long side direction of the belt portion 20 (hereinafter also referred to as the belt longitudinal direction). ing. The belt portion elastic region 92 is formed by cutting the skin-side sheet 21 and the non-skin-side sheet 22 of the belt portion 20 at predetermined positions in the long side direction (belt longitudinal direction), and extending the length of the belt portion 20 so as to straddle the cut portions. It is formed by arranging and joining elastic members that can expand and contract in the side direction. As the elastic member forming the belt portion elastic region 92, for example, a stretchable nonwoven fabric, a stretchable film, or a composite sheet in which these are laminated is used.

(Engaging portion 50)
At least one of the pair of belt portions 20 is provided with a first engagement portion 51 that engages the belt portions 20 when the diaper 1 is worn. In the present embodiment, at the outer end 20Leо in the width direction of the first belt portion 20L (that is, the end on the free end side of the first belt portion 20L), the skin side surface (skin side sheet 21) in the thickness direction is substantially A rectangular first engaging portion 51 is joined. The first engaging portion 51 is a member having a plurality of hooks projecting in the thickness direction, and is configured by, for example, a hook-and-loop fastener. The hook (not shown) of the first engaging portion 51 is caught by the fibers on the surface of the non-woven fabric (non-skin side sheet 21) constituting the second belt portion 20R, which is not to be engaged, so that the first belt portion 20L is removed. It can be engaged with the second belt portion 20R.

A second engaging portion 52 for engaging the body portion 10 with the belt portion 20 when the diaper 1 is worn is provided at the end portion of the body portion 10 on the side where the belt portion 20 is not joined in the longitudinal direction. It is In the present embodiment, at the other end in the longitudinal direction of the main body 10 (that is, the second waist portion 10f), a substantially rectangular shape is provided on both sides in the width direction and on the skin side surfaces in the thickness direction (top sheets 12 and 13). A pair of second engaging portions 52 are joined to each other. The second engaging portion 52 has a configuration similar to that of the first engaging portion 51, and is configured by, for example, a hook-and-loop fastener. In the example of FIG. 1, a pair of second engaging portions 52, 52 are provided on both sides in the width direction of the second waist portion 10f. do not have. For example, the second engaging portion 52 may be provided in the central portion in the width direction.

<Method of Wearing Diaper 1>
Next, a method of wearing the diaper 1 will be briefly described. 2A to 2C are schematic perspective views explaining how to wear the diaper 1. FIG.

When wearing the diaper 1, first, with the diaper 1 in the unfolded state shown in FIG. , 20R are spread outward in the width direction (see FIG. 2A).

From this state, the second belt portion 20R is wound from the dorsal side to the ventral side along the waist of the wearer, and the outer end portion 20Re? is arranged on the ventral side. Subsequently, the first belt portion 20L is wound from the dorsal side to the ventral side along the waist of the wearer, and the outer end portion 20Leо is arranged on the ventral side. Then, on the abdomen side of the wearer, the outer end portion 20Le® of the first belt portion 20L is superimposed on the non-skin side surface of the second belt portion 20R, and the first engaging portion 51 is engaged with the non-skin side surface of the second belt portion 20R. (see FIG. 2B). As a result, the first belt portion 20L and the second belt portion 20R form a loop along the wearer's waist, and the first waist portion 10b of the diaper 1 is fixed to the wearer's dorsal waist.

Then, while the second waist portion 10f of the main body portion 10 is turned from the dorsal side to the front side through the crotch portion of the wearer, the second waist portion 10f is pulled up around the wearer's abdominal waist, and the belt portion 20 (engaged The second engaging portion 52 is engaged with the non-skin side surface of at least one of the first belt portion 20L and the second belt portion 20R (see FIG. 2C). Thereby, the underpants-shaped diaper 1 having the waist opening BH and the pair of leg openings LH is formed.

It should be noted that the diaper 1 of this embodiment can also be worn upside down. That is, the first waist portion 10b of the main body portion 10 is arranged around the wearer's abdominal waist, and the diaper 1 is put on the diaper 1 in such a manner that it is engaged with the first engaging portion 51 and the second engaging portion 52 on the back side of the wearer. may be worn.

<Regarding the fit of the diaper 1>
In the diaper 1 of the present embodiment, the long side direction (longitudinal direction of the belt) of the belt portion 20 is arranged at a predetermined angle α with respect to the width direction. A good fit is obtained.

In conventional belt-type diapers, the belt portion is arranged along the width direction, that is, arranged so that the longitudinal direction of the belt portion and the longitudinal direction of the diaper body intersect perpendicularly. The belt portion having such a configuration can fit around the wearer's waist by tightening the wearer's body from the non-skin side to the skin side when worn. However, since tightening does not act in the vertical direction when the diaper is worn, positional displacement is likely to occur in the vertical direction (longitudinal direction). For example, when the wearer walks or moves while wearing the diaper, there is a high possibility that the diaper will slip downward, creating a gap in the groin area or worsening the fit. Therefore, there is a possibility that the wearer may feel uncomfortable.

On the other hand, in the diaper 1 of the present embodiment, the belt portion 20 is arranged so as to incline from the inner side in the width direction to the outer side (dorsal side) in the longitudinal direction. Therefore, as described with reference to FIGS. 2A to 2C, when the belt portion 20 is spread to both sides in the left-right direction (width direction) when wearing the diaper 1, the outer end portion 20e of the belt portion 20 is pulled up obliquely upward. be done. That is, the pair of belt portions 20L and 20R pulls the body portion 10 to both sides in the width direction and to the upper side in the vertical direction (outside in the longitudinal direction). Since the belt part 20 is obliquely wrapped around the wearer's waist from the back side to the abdomen side, displacement in the vertical direction is less likely to occur. Therefore, it becomes easier to prevent the main body 10 from slipping downward, and it is possible to prevent urine leakage from occurring due to a gap between the wearer's groin and the main body 10 .

In addition, since the belt portion 20 is arranged at an angle, the length W20 (see FIG. 3) is longer than when the belt portion 20 is not inclined (conventional example). That is, the width W20 of the belt portion 20 at the portion intersecting with the main body portion 10 is widened. Therefore, the body part 10 can be easily pulled over a wider range by the belt part 20 , and the wearer's body (buttocks) can be widely covered by the body part 10 .

Thus, in the diaper 1, since the long side direction of the belt portion 20 is arranged so as to be inclined with respect to the width direction of the main body portion 10, misalignment is less likely to occur when the diaper is worn, and good fitting is achieved. It is possible to realize sexuality.

The inclination angle α of the long side direction (belt longitudinal direction) of the belt portion 20 with respect to the width direction of the diaper 1 is desirably 3 degrees or more and 50 degrees or less, and more desirably about 10 degrees. . If the inclination angle is too small, vertical positional displacement cannot be sufficiently suppressed, as in conventional belt-type diapers. On the other hand, if the inclination angle is too large, when the belt portion 20 is pulled outward in the width direction when the diaper 1 is put on, it becomes difficult for the force in the width direction to sufficiently act on the body portion 10, and the body portion 10 fits. sexuality may worsen. Therefore, in the diaper 1, the inclination angle α of the belt portion 20 is set to 3 degrees or more and 50 degrees or less.

Further, in the diaper 1, the belt portion 20 is interlocked with other parts, thereby making it easier to suppress misalignment and deterioration of fit. FIG. 3 is an enlarged plan view for explaining the detailed configuration of the belt portion 20. As shown in FIG. In addition, since the first belt portion 20L and the second belt portion 20R are arranged symmetrically (left-right symmetrically) in the width direction, FIG. Illustration is omitted. However, the first belt portion 20L and the second belt portion 20R do not necessarily have to be arranged symmetrically. For example, the first belt portion 20L and the second belt portion 20R may have different lengths in the left-right direction and lengths in the longitudinal direction, and may have shapes other than rectangles.

As indicated by the shaded area in FIG. 3, the belt portion 20 (the first belt portion 20L and the second belt portion 20R) has a portion that overlaps the waist elastic region 91 in the longitudinal direction. Therefore, when the belt portion 20 is pulled to both sides in the width direction (left and right direction) when wearing the diaper 1, the waist elastic region 91 is also likely to be pulled to the outside in the width direction. That is, in the region where the belt portion 20 and the waist elastic region 91 overlap in the longitudinal direction, the force that pulls the belt portion 20 outward in the width direction is likely to act on the waist elastic region 91, and the waist elastic region 91 extends in the width direction. Easier to stretch. As a result, the stretching force of the waist elastic region 91 efficiently acts on the wearer's dorsal waist, and the fit of the first waist portion 10b is improved.

Furthermore, the waist elastic region 91 and the belt portion 20 may have overlapping portions in the thickness direction. In this case, the force that pulls the belt portion 20 to both sides in the width direction directly acts on the waist elastic region 91, making it easier to stretch the waist elastic region 91 in the width direction. As a result, the stretching force of the waist elastic region 91 acts more efficiently on the back side waist of the wearer, and the fit of the first waist portion 10b of the diaper 1 is further improved.

Moreover, in the longitudinal direction, there is a portion where the widthwise outer end 20s of the belt portion 20 and the waist elastic region 91 overlap. It should be noted that the “outer end 20 s in the width direction of the belt portion 20 ” referred to herein refers to a short side of the belt portion 20 located on the outer side in the width direction. When the belt portion 20 is pulled to both sides in the width direction when the diaper 1 is put on, it is often the case that the outer ends 20Leo and 20Reo of the belt portion 20 in the width direction are grabbed and pulled. Therefore, if the position of the outer end (short side) 20s of the belt portion 20 in the width direction and the position of the waist elastic region 91 deviate in the longitudinal direction, a force that pulls the belt portion 20 outward in the width direction acts. The position and the position where the force that pulls the waist elastic region 91 outward in the direction may deviate from each other, and the waist elastic region 91 may become difficult to expand in the width direction. On the other hand, in the present embodiment, the outer edge (short side) 20s of the belt portion 20 in the width direction and the waist elastic region 91 have overlapping portions in the longitudinal direction. The position where the force pulling outward acts and the position where the force pulling the waist elastic region 91 outward in the direction of direction overlaps at least partly in the longitudinal direction. Therefore, the waist elastic region 91 can be easily stretched in the width direction, and the elastic force of the waist elastic region 91 can be easily applied to the wearer's dorsal waist.

In addition, since the belt portion 20 is provided with the belt portion elastic region 92 that can expand and contract along the belt longitudinal direction, the belt portion 20 itself can expand and contract in the width direction. Therefore, in combination with the stretchability of the waist elastic region 91, the adaptable range of the diaper 1 to the wearer's waist can be widened. Moreover, even when the wearer moves the body while wearing the diaper 1, the belt portion 20 is easily deformed according to the movement of the body, so that the fit can be further improved. Although it is desirable that the belt portion elastic region 92 is provided on both the first belt portion 20L and the second belt portion 20R, it is provided only on one side of the first belt portion 20L and the second belt portion 20R. The above effects can be obtained even if the

The belt elastic region 92 is desirably located closer to the outer edge 10s of the main body 10 than the outer edge 20s of the belt 20 (20L, 20R) in the width direction (longitudinal direction of the belt). , and more preferably overlap with the outer end 10s of the main body 10 in the thickness direction. For example, the width direction outer end 20Leо including the outer end 20s of the first belt part 20L is engaged with the outer end 20Reо of the second belt part 20R by the first engaging part 51 when the diaper 1 is worn ( 2B), even if the belt portion elastic region 92 is provided in the vicinity of this region, the belt portion 20 is difficult to expand and contract in the width direction. On the other hand, if the belt elastic region 92 is provided near the outer end 10s of the main body 10, the belt 20 can be easily stretched in the width direction even when the diaper 1 is put on, and the fit can be easily improved. In addition, since the rigidity of the belt elastic region 92 of the belt 20 is lower than that of other regions, the rigidity of the belt 20 increases in the region near the outer end 10s of the main body 10 where the wearer's skin tends to come into contact. can be made soft to the touch.

It is desirable that the extension stress in the width direction of the belt elastic region 92 is higher than the extension stress in the width direction of the waist elastic region 91 . That is, it is desirable that the belt portion elastic region 92 is less likely to stretch in the width direction than the waist elastic region 91 . In this case, when the belt portion 20 is pulled outward in the width direction, the waist elastic region 91 first expands in the width direction, and then the belt portion elastic region 92 expands in the width direction. Therefore, the previously stretched waist elastic region 91 (waist gathers) is easily fitted to the wearer's back side waist circumference with appropriate stress, and then the belt portion 20 is worn based on the stretchability of the belt portion elastic region 92. It can be fitted around a person's waist. As a result, when the diaper 1 is worn, the fit around the waist is improved.

In addition, the "elongation stress" can be measured by, for example, conducting the following stress test. First, a portion including the waist elastic region 91 is cut out from the diaper 1 and cut into a predetermined size to obtain a test piece A. Similarly, a portion including the belt portion elastic region 92 is cut out and cut into the same size as the test piece A to obtain a test piece B. These test pieces A and B are clamped by chucks of a tensile tester (Instron) with a length (for example, 25 mm) in the left-right direction when relaxed as a measurement section. Then, at a predetermined speed (e.g., 100 mm/min), the measurement section is stretched to a predetermined length (e.g., 50 mm) in both left and right directions. Shrink until it returns to (25 mm). This cycle is repeated multiple times (for example, twice), and in multiple cycles, the tensile load is measured when stretched to a predetermined length, so that the elongation stresses of test piece A and test piece B are calculated and compared. do. If the stretchable range of the test piece is narrow and cannot be stretched to a predetermined length, the predetermined length of the stretched measurement section may be shortened (for example, 50 mm to 40 mm).

Moreover, in the width direction, the belt portion 20 (the first belt portion 20L and the second belt portion 20R) has a portion that overlaps the leg elastic member 18 . In the diaper 1, the belt portion 20 is pulled obliquely upward (outside in the longitudinal direction), so that in the region where the belt portion 20 and the leg elastic member 18 overlap, the belt portion 20 and the leg elastic member 18 are pulled. Member 18 is also pulled upwards. Therefore, the leg elastic members 18 can be easily stretched in the longitudinal direction, and the tightness of the leg openings LH of the diaper 1 to the inguinal region of the wearer can be enhanced. As a result, a gap is less likely to occur between the leg opening LH of the diaper 1 and the groin of the wearer, and side leakage of urine and the like can be suppressed.

Furthermore, the leg elastic member 18 and the belt portion 20 may have overlapping portions in the thickness direction. In this case, the force that pulls up the belt portion 20 obliquely upward acts directly on the leg elastic members 18, making it easier to elongate the leg elastic members 18 in the longitudinal direction. This makes it more difficult for a gap to occur between the leg opening LH of the diaper 1 and the groin of the wearer.

As described above, the widthwise inner ends 20Lei and 20Rei of the belt portion 20 are sandwiched between the top sheets 12 and 13 and the back sheet 14 and are firmly joined to the body portion 10. there is Therefore, even if the belt portion 20 is pulled obliquely upward with a strong force when wearing the diaper 1, the joint between the belt portion 20 and the body portion 10 is unlikely to come off. As a result, the force that pulls the belt portion 20 is firmly transmitted to the first waist portion 10b, the belt portion elastic region 92, the leg elastic members 18, etc., and each elastic member is appropriately stretched. It is easy to improve the fit of the.

In addition, since the belt portion 20 of the diaper 1 extends further outward than the outer ends 10s of the body portion 10 in the width direction, the belt portion 20 is folded into a small size when the diaper 1 is marketed. should be packed as compactly as possible. FIG. 4 is a diagram illustrating an example of packing the diaper 1. As shown in FIG.

When packing the diaper 1, the belt portions 20L and 20R are each folded inward in the width direction, and the first belt portion 20L and the second belt portion 20R are joined together by the first engagement portion 51 near the central portion in the width direction. are engaged to fix their positions. At this time, as shown in FIG. 4, by obliquely bending the first belt portion 20L and the second belt portion 20R, the long side direction (belt longitudinal direction) of the first belt portion 20L and the second belt portion 20R The belt portion 20 is folded so that the long side direction (longitudinal direction of the belt) of . Then, at a predetermined position in the longitudinal direction, the body portion 10 is folded into three in the longitudinal direction at the first folded portion F1 and the second folded portion F2 along the width direction. Thus, the diaper 1 can be folded compactly. Although the belt portions 20L and 20R are folded toward the skin side of the body portion 10 in FIG. 4, they may be folded toward the non-skin side of the body portion 10. FIG. Also, the body portion 10 may be folded in two in the longitudinal direction, or may be folded in four or more.

As shown in FIG. 4, the belt portions 20L and 20R are engaged so as to intersect with each other, so that a user who purchases the diaper 1 and unpacks the first belt portion 20L and the second belt portion 20R can is engaged by the first engaging portion 51 at the central portion in the width direction. If both the first belt portion 20L and the second belt portion 20R are bent straight along the width direction, the first belt portion 20L and the second belt portion 20R overlap in the thickness direction to form one band. It may look like In addition, since both are engaged by the first engaging portion 51 at the ends in the width direction, the engagement position between the first belt portion 20L and the second belt portion 20R is less conspicuous, and the diaper 1 can be Smooth deployment may be difficult. On the other hand, by folding the first belt portion 20L and the second belt portion 20R so as to intersect each other as shown in FIG. 4, the engagement position between the first belt portion 20L and the second belt portion 20R can be recognized. This makes it easier for the user to understand how to unfold the first belt portion 20L and the second belt portion 20R. Therefore, the user can unfold the diaper 1 smoothly without hesitation.

Further, when the first belt portion 20L and the second belt portion 20R are engaged so as to cross each other, as shown in FIG. are arranged along the long side direction of the belt (longitudinal direction of the belt). That is, of the angles formed by the long side direction of the first engaging portion 51 and the long side direction of the second belt portion 20R, the smaller angle θ1 is the long side direction of the first engaging portion 51 and the second belt portion. It is smaller than the smaller angle θ2 (θ1<θ2) among the angles formed with the short side direction of 20R. In this case, the length of the portion where the first engaging portion 51 is engaged with respect to the belt longitudinal direction of the second belt portion 20R becomes longer. That is, the engagement range in the belt longitudinal direction becomes large, and the engagement between the first belt portion 20L and the second belt portion 20R in the belt longitudinal direction becomes difficult to be released. Therefore, when the person who has purchased the diaper 1 takes it out of the package, the engagement of the belt portion 20 is prevented from coming off naturally.

<Modification>
The second engaging portion 52 of the diaper 1 may be modified as follows. FIG. 5 is a developed plan view of a modification of the diaper 1. FIG. In the diaper 1 of the modified example, a pair of tape portions 40 , 40 are provided at both ends in the width direction of the second waist portion 10 f of the body portion 10 . The tape portion 40 is a substantially rectangular sheet member as shown in FIG. A second engaging portion 52 is provided. The tape portions 40 are arranged so as to incline from the inner side in the width direction to the outer side (abdominal side) in the longitudinal direction. That is, the tape portion 40 is joined to the body portion 10 such that the long side direction of the tape portion 40 is inclined by a predetermined angle β with respect to the width direction of the diaper 1 .

When wearing the diaper 1 of the modified example, in the same manner as described with reference to FIGS. is wrapped around the waist and engaged annularly. Then, the second waist portion 10f is pulled up around the wearer's ventral waist while the second waist portion 10f is turned from the dorsal side to the front side through the crotch portion of the wearer, and is engaged with the non-skin side of the belt portion 20 for the second engagement. Engage portion 52 .

In this modification, when the second waist portion 10f is pulled up around the wearer's abdominal waist, the pair of tape portions 40, 40 are grasped and pulled obliquely upward, while the second engaging portion 52 is attached to the belt portion 20. can be engaged. That is, by stretching the second waist portion 10f of the body portion 10 in the width direction and pulling it upward, it is possible to make the body portion 10 more easily fit to the crotch portion of the wearer. In addition, since the body part 10 is engaged with the belt part 20 by the second engaging part 52 in a state in which the body part 10 is expanded in the width direction on the ventral side, the body part 10 can cover a wide area around the wearer's ventral waist. will be able to

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

In the above-described embodiment, as the engaging portion 50 (the first engaging portion 51 and the second engaging portion 52), a hook-and-loop fastener having a hook was exemplified. Also good. For example, an adhesive member or the like that can be attached to the nonwoven fabric may be used as the engaging portion 50 .

1 disposable diapers (diapers),
10 main body,
10b first waistline part, 10f second waistline part, 10s end,
11 absorber, 11a absorbent core, 11b core wrap sheet,
12 center topsheet, 12eo outer edge,
13 side topsheet, 13ei inner edge,
14 back sheet, 14a liquid-impermeable sheet, 14b hydrophobic sheet,
15 LSG elastic member,
16 LSG elastic members,
18 leg elastic member,
19 waist elastic member,
20 belt portion, 20s end (short side),
20L first belt portion, 20Lei inner end portion, 20Leo outer end portion,
20R second belt portion, 20Rei inner end portion, 20Reo outer end portion,
21 skin side sheet, 22 non-skin side sheet,
40 tape section,
50 engagement portion,
51 first engaging portion, 52 second engaging portion,
91 waist elastic region, 92 belt portion elastic region,
111 constricted portion, 115 low basis weight region,
LSGi inner three-dimensional gather, LSGo outer three-dimensional gather,
LB waist opening,
LH leg opening,
α angle, β angle

Claims (11)

having a longitudinal direction, a width direction, and a thickness direction that intersect each other;
a body portion including a first waist portion located on one side in the longitudinal direction and a second waist portion located on the other side in the longitudinal direction;
In the width direction, a first belt portion joined to one side of the first waist portion, a second belt portion joined to the other side of the first waist portion,
An absorbent article having
The first belt portion is provided with a first engaging portion that engages the first belt portion with the non-skin side of the second belt portion when wearing the absorbent article,
When wearing the absorbent article, the second waist portion is engaged with the non-skin side of at least one of the first belt portion and the second belt portion that are engaged with each other. A second engaging portion is provided for fitting,
The first belt portion and the second belt portion are joined to the first waist portion so as to be inclined outward in the longitudinal direction from the inner side to the outer side in the width direction,
The first waist portion is provided with a waist elastic region that can expand and contract in the width direction,
In the longitudinal direction, the widthwise outer end of the first belt portion and the widthwise outer end of the second belt portion overlap with the waist elastic region. Absorbent article. The absorbent article according to claim 1 ,
The absorbent article, wherein the first belt portion, the second belt portion, and the waist elastic region overlap in the thickness direction. The absorbent article according to claim 1 or 2 ,
At least one of the first belt portion and the second belt portion is provided with a belt portion elastic region capable of stretching in the longitudinal direction of each of the first belt portion and the second belt portion. An absorbent article characterized by: The absorbent article according to claim 3 ,
The belt elastic region provided in the first belt portion is arranged at a position closer to the one side end of the body portion than the outer end of the first belt portion in the width direction,
The belt elastic region provided on the second belt portion is arranged at a position closer to the other end of the body portion than the outer end of the second belt portion in the width direction. An absorbent article characterized by: The absorbent article according to claim 3 or 4 ,
The first waist portion is provided with a waist elastic region that can expand and contract in the width direction,
An absorbent article, wherein the extension stress of the belt portion elastic region is higher than the extension stress of the waist elastic region. having a longitudinal direction, a width direction, and a thickness direction that intersect each other;
a body portion including a first waist portion located on one side in the longitudinal direction and a second waist portion located on the other side in the longitudinal direction;
In the width direction, a first belt portion joined to one side of the first waist portion, a second belt portion joined to the other side of the first waist portion,
An absorbent article having
The first belt portion is provided with a first engaging portion that engages the first belt portion with the non-skin side of the second belt portion when wearing the absorbent article,
When wearing the absorbent article, the second waist portion is engaged with the non-skin side of at least one of the first belt portion and the second belt portion that are engaged with each other. A second engaging portion is provided for fitting,
The first belt portion and the second belt portion are joined to the first waist portion so as to be inclined outward in the longitudinal direction from the inner side to the outer side in the width direction,
leg-surrounding elastic members that can expand and contract along the longitudinal direction are provided on both sides of the main body in the width direction,
The absorbent article, wherein the first belt portion, the second belt portion, and the leg elastic members overlap in the width direction. The absorbent article according to claim 6 ,
The absorbent article, wherein the first belt portion, the second belt portion, and the leg elastic members overlap in the thickness direction. The absorbent article according to any one of claims 1 to 7 ,
The first waist portion has a skin-side sheet and a non-skin-side sheet laminated in the thickness direction,
The absorbent article, wherein at least a part of the first belt portion and the second belt portion is joined while being sandwiched between the skin-side sheet and the non-skin-side sheet. The absorbent article according to any one of claims 1 to 7 ,
Having a pair of tape portions extending outward from both ends of the second waist portion in the width direction,
The second engaging portion is provided on the tape portion,
The absorbent article, wherein the pair of tape portions are joined to the second waist portion so as to be inclined outward in the longitudinal direction from the inner side to the outer side in the width direction. having a longitudinal direction, a width direction, and a thickness direction that intersect each other;
a body portion including a first waist portion located on one side in the longitudinal direction and a second waist portion located on the other side in the longitudinal direction;
In the width direction, a first belt portion joined to one side of the first waist portion, a second belt portion joined to the other side of the first waist portion,
An absorbent article having
The first belt portion is provided with a first engaging portion that engages the first belt portion with the non-skin side of the second belt portion when wearing the absorbent article,
When wearing the absorbent article, the second waist portion is engaged with the non-skin side of at least one of the first belt portion and the second belt portion that are engaged with each other. A second engaging portion is provided for fitting,
The first belt portion and the second belt portion are joined to the first waist portion so as to be inclined outward in the longitudinal direction from the inner side to the outer side in the width direction,
In a packed state, the first belt portion and the second belt portion are connected to the first engagement portion so that the long side direction of the first belt portion and the long side direction of the second belt portion intersect each other. An absorbent article characterized in that it is engaged by: The absorbent article according to claim 10 ,
In the packed state, the smaller angle between the long-side direction of the first engaging portion and the long-side direction of the second belt portion is
The absorbent article, wherein the angle is smaller than the smaller angle between the long-side direction of the first engaging portion and the short-side direction of the second belt portion.

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