JP7195945B2 - Pants-type disposable diaper - Google Patents

Description

The present invention relates to an underpants-type disposable diaper.

Patent Literature 1 discloses an underpants-type disposable diaper including an absorbent body and an outer wrapping material fixing the absorbent body. The outer wrapping material of the diaper of Patent Document 1 has a structure in which two sheets are laminated, and has a high wearing pressure region in which an elastic sheet different from the two sheets is arranged. By bringing this high wearing pressure region into contact with the region from the iliac crest to the anterior superior iliac crest of the wearer, it is possible to effectively prevent the diaper from slipping down while wearing the diaper.

Patent No. 5020362

However, when the wearer of the diaper or the caregiver cannot grasp the position of the high wearing pressure area (high pressure area), the degree of pulling up the diaper is adjusted so that the high wearing pressure area is located at an appropriate position for the wearer. difficult. If so, there is a risk that the effect of the high mounting pressure region cannot be obtained. Conversely, there is a risk that the high wearing pressure area will be located in a place that should not be tightened (for example, the bulging portion of the lower abdomen and buttocks), and the wearing comfort of the diaper will be lowered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to enable a wearer to wear a pants-type disposable diaper having a high-pressure region in an appropriate position.

The main invention for achieving the above object is
having a vertical direction, a horizontal direction, and a front-back direction that intersect each other;
A pants-type disposable diaper having a belt portion and an absorbent body,
The belt portion has a low pressure area and a high pressure area below the stretchable area along the edge of the waist opening,
The low-pressure area and the high-pressure area are adjacent to each other and have elasticity in the left-right direction,
The force for extending the high-pressure region having a unit width in the vertical direction by a unit length in the horizontal direction is the force for extending the low-pressure region having a unit width in the horizontal direction by the unit length. larger than
When the belt portion is viewed from at least one of the non-skin side and the skin side, the contour portion of the high pressure area in the vertical direction has a different color from the low pressure area,
When the belt portion is viewed from at least one of the non-skin side and the skin side,
In the high pressure region and the low pressure region, if the difference in a* value in the L*a*b* color system is Δa* and the difference in b* value is Δb*, the color difference ΔE* is calculated by the following formula:
ΔE ^* = [(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2
The color difference ΔE* is 1.45 or more,
the low pressure area is a single color;
The low pressure region is imparted with stretchability by a member having stretchability provided in the low pressure region,
The high pressure region has a different color portion that is a single color different from the single color of the low pressure region, and a non-unique color portion other than the different color portion and having the same single color as the single color of the low pressure region. ,
The belt portion has a front belt portion and a rear belt portion,
Both side portions of the front belt portion in the left-right direction and both side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions,
The unique color portion is arranged continuously in the left-right direction across the pair of locking portions,
This pants-type disposable diaper is characterized by:
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, a pants-type disposable diaper having a high-pressure region can be worn at an appropriate position of the wearer.

1 is a schematic perspective view of an underpants-type disposable diaper 1. FIG. 1 is a schematic plan view of diaper 1 in an unfolded and stretched state; FIG. FIG. 3 is a schematic cross-sectional view taken along line II of FIG. 2; FIG. 4A is a view showing an example of the joint portion 30 of the front belt portion 21 and the rear belt portion 22, and FIG. 4B is a schematic sectional view of the front belt portion 21 and the rear belt portion 22. FIG. 3 is a schematic plan view of a front belt portion 21; FIG. 4 is a schematic plan view of a rear belt portion 22; FIG. 6 is a table showing test results for the visibility of the high pressure area 60. FIG. FIG. 6 is an explanatory diagram of a joint portion 30 formed in an elastic film 65;

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
A pants-type disposable diaper having a vertical direction, a horizontal direction, and a front-back direction that intersect with each other, and having a belt portion and an absorbent main body, wherein the belt portion extends below an elastic region along the edge of a waist opening. In the above, it has a low pressure area and a high pressure area, the low pressure area and the high pressure area are adjacent to each other, have elasticity in the horizontal direction, and have a unit width in the vertical direction The force for extending the high pressure region by a unit length in the left-right direction is greater than the force for extending the low pressure region of the unit width by the unit length in the left-right direction, and the belt portion is viewed from at least one of the non-skin side and the skin side, at least a portion of the high pressure region has a color different from that of the low pressure region.

According to such an underpants-type disposable diaper, the user can grasp the position of the high-pressure area, and can align the high-pressure area with the place to be tightened on the wearer. Therefore, the diaper is put on the wearer at an appropriate position, so that the effect of the high pressure area can be obtained. In addition, it is possible to prevent the high pressure region from being located in a place where the wearer should not be tightened, which may reduce the wearing comfort of the diaper.

In this pants-type disposable diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, the outline of the high pressure area in the vertical direction is different from the low pressure area. The underpants-type disposable diaper is colored.

According to such an underpants-type disposable diaper, the boundary between the high-pressure area and the low-pressure area becomes clear, and the user can more easily grasp the position of the high-pressure area.

In this underpants-type disposable diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, L ^* a ^* b ^* color specifications are obtained in the high pressure region and the low pressure region. If the difference in the a ^* value of the system is Δa ^* and the difference in the b ^* value is Δb ^* , the color difference ΔE ^* is calculated by the following formula: ΔE ^* =[(Δa ^* ) ² +(Δb ^* ) ² ] ^1/2 The underpants-type disposable diaper is characterized in that the color difference ΔE ^* is 1.45 or more.

According to such a pants-type disposable diaper, the user can distinguish between the high pressure area and the low pressure area.

In such a pants-type disposable diaper, when the belt portion is viewed from the non-skin side,
The underpants-type disposable diaper is characterized in that the color difference ΔE ^* is 1.45 or more.

According to such a pants-type disposable diaper, since the high-pressure area is visible from the non-skin side (outside), the high-pressure area is easily recognized by the user, and the high-pressure area is located at the place where the wearer should tighten. are easier to align.

The underpants-type disposable diaper is characterized in that the high-pressure area has an elastic member that expands and contracts in the left-right direction, and the elastic member is colored in a color different from that of the low-pressure area. It is a pants-type disposable diaper.

According to such an underpants-type disposable diaper, the high-pressure region recognized by the user coincides with the region where tightening pressure is strong, so that the effect of the high-pressure region can be easily obtained.

In the underpants-type disposable diaper, a plurality of materials are laminated in the thickness direction of the belt portion in the high-pressure region, and the elastic member is arranged on the non-skin side. It is characterized by a pants-type disposable diaper.

According to such a pants-type disposable diaper, the high-pressure area is easily visible from the non-skin side (outside), so that the user can easily recognize the high-pressure area. are easier to align.

This underpants-type disposable diaper is characterized in that the elastic member is a sheet-like elastic member.

According to such an underpants-type disposable diaper, since the colored elastic member has a planar shape, the area of the portion having a color different from that of the low-pressure region in the high-pressure region is large, and the high-pressure region is easily visible. Become.

This underpants-type disposable diaper is characterized in that, in the high-pressure region, a plurality of the elastic members are arranged at intervals in the vertical direction.

According to such an underpants-type disposable diaper, the high-pressure area has a striped pattern, and the striped pattern is conspicuous as an accent, making it easier for the user to recognize the high-pressure area.

In this underpants-type disposable diaper, the elastic member is intermittently joined to the sheet arranged on the non-skin side of the elastic member by a plurality of joints, The interval between the joints adjacent in the vertical direction is smaller than the length of the stretchable member, and the distance between the joints adjacent in the left-right direction is smaller than the length of the stretchable member in the left-right direction. The underpants-type disposable diaper is characterized in that the interval is smaller.

According to such a pants-type disposable diaper, since fine wrinkles (unevennesses) are formed on the stretchable member, the stretchable member can be visually recognized and the user can be given the impression that the diaper is soft.

In this underpants-type disposable diaper, the high-pressure region has a different-color portion having a color different from that of the low-pressure region, and a non-different-color portion other than the different-color portion, and is located at the center of the belt portion in the left-right direction. The underpants-type disposable diaper is characterized in that the ratio of the different-colored portion per unit area is higher in the portion than in the end portion.

According to such an underpants-type disposable diaper, the high-pressure region is conspicuous in the central portion in the left-right direction of the belt portion, which tends to be noticed by the user, and thus the high-pressure region is easily recognized by the user.

In such an underpants-type disposable diaper, the belt portion has a front belt portion and a rear belt portion, and the pressure from the upper end of the high pressure area located in the center portion of the front belt portion in the left-right direction is extended from the upper end of the high pressure area. The length in the vertical direction to the waist opening is different from the length in the vertical direction from the upper end of the high pressure region located at the center of the rear belt portion in the left-right direction to the waist opening. It is characterized by a pants-type disposable diaper.

According to such a pants-type disposable diaper, it is possible to determine whether the diaper is forward or backward based on the visible high pressure region.

In this underpants-type disposable diaper, the belt portion has a front belt portion and a rear belt portion, and both sides of the front belt portion in the left-right direction and the left-right direction of the rear belt portion are locked by a pair of locking portions, the high pressure region has a first high pressure region in the front belt portion, and the first high pressure region is the pair of It is characterized in that it is arranged continuously in the left-right direction across the locking portions, and the center portion in the left-right direction of the first high pressure region is positioned lower than both end portions. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, it is possible to prevent the abdomen of the wearer from being excessively tightened by the first high-pressure region. In addition, the wearer's vicinity of the anterior superior iliac spine can be tightened at both ends in the left-right direction of the first high-pressure region, and displacement of the diaper when worn can be suppressed.

In this underpants-type disposable diaper, the high-pressure region has a second high-pressure region in the front belt portion, and the second high-pressure region extends between the pair of locking portions on the left and right sides. and both ends of the second high-pressure region in the left-right direction are positioned below the first high-pressure region, and the two ends of the second high-pressure region in the left-right direction At least a portion of the central portion of the pants-type disposable diaper overlaps the first high-pressure region.

According to such a pants-type disposable diaper, it is possible to prevent the abdomen of the wearer from being excessively tightened by the second high-pressure region. In addition, both ends in the left-right direction of the second high-pressure region can be tightened so as to support the anterior superior iliac spine of the wearer from below, thereby suppressing displacement of the diaper when worn.

In this underpants-type disposable diaper, the belt portion has a front belt portion and a rear belt portion, and both sides of the front belt portion in the left-right direction and the left-right direction of the rear belt portion are locked by a pair of locking portions, the high pressure region has a third high pressure region in the rear belt portion, and the third high pressure region is connected to the pair of The third high-pressure region is arranged continuously in the left-right direction across the locking portions of the third high-pressure region, and the center portion of the third high-pressure region in the left-right direction is positioned above both end portions. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, it is possible to prevent the third high-pressure region from excessively tightening the center of the buttocks of the wearer.

In this underpants-type disposable diaper, the high-pressure region has a fourth high-pressure region in the rear belt portion, and the fourth high-pressure region extends between the pair of locking portions. It is arranged continuously in the left-right direction, and both ends of the fourth high-pressure region in the left-right direction are located above the third high-pressure region, and At least a portion of the central portion of the pants-type disposable diaper overlaps with the third high-pressure region.

According to such a pants-type disposable diaper, it is possible to prevent the fourth high-pressure region from excessively tightening the center of the buttocks of the wearer. In addition, the vicinity of the anterior superior iliac spine of the wearer can be tightened at both ends in the left-right direction of the fourth high-pressure region, and misalignment of the diaper when worn can be suppressed.

===Embodiment===
Hereinafter, as an underpants-type disposable diaper, an embodiment will be described by taking an underpants-type disposable diaper for adults as an example. However, it is not limited to this, and the underpants-type disposable diaper according to the present invention can be applied, for example, as disposable diapers for children (for infants), sanitary shorts, and the like.

<<Basic Configuration of Diaper 1>>
FIG. 1 is a schematic perspective view of an underpants-type disposable diaper 1 (hereinafter also referred to as diaper 1). FIG. 2 is a schematic plan view of diaper 1 in an unfolded and stretched state. FIG. 3 is a schematic cross-sectional view taken along line II (center in the left-right direction) of FIG. FIG. 4A is a view showing an example of the joint portion 30 of the front belt portion 21 and the rear belt portion 22, and FIG. 4B is a schematic cross-sectional view of the front belt portion 21 and the rear belt portion 22. FIG.

The diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other, and has a thickness direction in which each member is laminated as shown in FIG. 3 . In the up-down direction, the side to be the wearer's torso side is the upper side, and the wearer's crotch side is to be the lower side. In the front-rear direction, the front side is the side that serves as the wearer's ventral side, and the rear side is the side that serves as the wearer's dorsal side. Thickness direction WHEREIN: Let the side which touches a wearer be a skin side, and let the other side be a non-skin side.

The diaper 1 has an absorbent body 10 and an outer body 20 located on the non-skin side of the absorbent body 10 . The outer body 20 includes a front belt portion 21 (belt portion) arranged on the abdomen of the wearer, a rear belt portion 22 (belt portion) arranged on the back side of the wearer, and a crotch portion 23 connecting them. and

In the diaper 1 of the present embodiment, the outer body 20 is composed of three members (the front belt portion 21, the rear belt portion 22, and the crotch portion 23), but the present invention is not limited to this. For example, the front belt portion 21, the rear belt portion 22, and the crotch portion 23 may be configured as one continuous member. Moreover, it is good also as a structure which does not have the crotch part 23. FIG.

In the diaper 1 in the unfolded state shown in FIG. 2, the front belt portion 21 is positioned at one longitudinal end of the absorbent main body 10, and the rear belt portion 22 is positioned at the other longitudinal end of the absorbent main body 10. positioned. In the diaper 1 in the unfolded state, the absorbent main body 10 is folded in two at substantially the center in the longitudinal direction, and both sides of the front belt portion 21 in the left-right direction and both sides of the rear belt portion 22 in the left-right direction are engaged in a pair. By being locked at the stop portion 24, the underpants type shown in FIG. 1 is formed. That is, the longitudinal direction of the absorbent main body 10 extends along the vertical direction of the diaper 1, the front belt portion 21 and the rear belt portion 22 are connected in a ring shape, and the waist opening 1a is formed at the upper end thereof. is formed with a pair of leg openings 1b. As a locking method by the locking portion 24, welding, bonding with an adhesive, or the like can be exemplified.

As shown in FIG. 3, the absorbent main body 10 includes an absorbent core 11, a liquid-permeable top sheet 12 positioned on the skin side of the absorbent core 11, and a back positioned on the non-skin side of the absorbent core 11. a seat 13; The back sheet 13 of this embodiment has a two-layer structure of a liquid-impermeable sheet 13a and a hydrophobic liquid-permeable sheet (for example, hydrophobic nonwoven fabric) 13b arranged on the non-skin side thereof.

The absorbent core 11 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). Although not shown, the absorbent core 11 may have its outer peripheral surface covered with a liquid-permeable sheet such as tissue paper or nonwoven fabric.

As shown in FIG. 2, the front belt portion 21 and the rear belt portion 22 have waist regions 211 and 221 that overlap with the locking portion 24 in the vertical direction, and waist regions 211 and 221 below the waist regions 211 and 221, respectively. It has crotch side regions 212 and 222 .

The crotch region 212, 222 has a substantially trapezoidal shape, and the width (the length in the left-right direction) becomes narrower toward the lower side. In addition, the rear belt portion 22 has a larger crotch region 222 than the front belt portion 21, and can cover the wearer's buttocks.

As shown in FIG. 3, the front belt portion 21 and the rear belt portion 22 include skin-side sheets 213 and 223, non-skin-side sheets 214 and 224, and elastic nonwoven fabrics 215 and 225 positioned therebetween. have. Examples of the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224 are flexible sheets made of spunbond nonwoven fabric, SMS nonwoven fabric, or the like. The skin-side sheets 213, 223 and the non-skin-side sheets 214, 224 are non-stretchable sheets that do not substantially stretch.

The stretchable nonwoven fabrics 215 and 225 are sheets that stretch at least in the horizontal direction of the diaper 1 . Also, the stretchable nonwoven fabrics 215 and 225 are nonwoven fabrics containing stretchable fibers and non-stretchable fibers (that is, extensible fibers having lower contractility than the stretchable fibers).

As the stretchable nonwoven fabrics 215 and 225, stretchable fibers of a polyurethane-based elastomer, which is a type of thermoplastic elastomer having elasticity, and non-stretchable polypropylene (PP), which is a polyolefin-based resin which is a type of thermoplastic resin having inelasticity, are used. A nonwoven fabric obtained by subjecting elastic fibers to an appropriate stretching treatment such as gear stretching can be exemplified. The stretching process may be performed in directions perpendicular to each other (horizontal direction and vertical direction of the diaper 1), or may be performed only in a predetermined direction (horizontal direction of the diaper 1). good too. In addition, when the stretching treatment is performed only in a predetermined direction, stretchability in the predetermined direction is exhibited, but since not all fibers are oriented along the predetermined direction, there is also a direction perpendicular to the predetermined direction. Elasticity is exhibited.

The skin-side sheets 213, 223, the non-skin-side sheets 214, 224, and the stretchable nonwoven fabrics 215, 225 are joined by the joining portion 30 while the stretchable nonwoven fabrics 215, 225 are stretched in the left-right direction. ing. As shown in FIG. 4A , the joints 30 are preferably scattered in the left-right direction and the up-down direction of the diaper 1 . By doing so, when the diaper 1 shrinks, the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224 are loosened between the joints 30 to form protrusions projecting outward in the thickness direction. . On the other hand, the stretchable nonwoven fabrics 215 and 225 expand in the thickness direction because the stretchable fibers shrink while entwining (gathering) the non-stretchable fibers. Therefore, the projections are supported by the fibers of the stretchable nonwoven fabrics 215 and 225 and are less likely to be crushed, increasing the cushioning properties of the projections. Therefore, the front belt portion 21 and the rear belt portion 22 can be made to feel better against the wearer's skin. In addition, the user can be given an impression that the diaper 1 is visually soft.

Also, the crotch portion 23 is configured such that the stretchable nonwoven fabric 233 is arranged between the skin-side sheet 231 and the non-skin-side sheet 232 in the same manner as the front belt portion 21 and the rear belt portion 22 . However, the structure of the crotch part 23 is not particularly limited, and for example, it is a structure in which the stretchable nonwoven fabric 233 is arranged between the absorbent main body 10 and the non-skin side sheet 232 without the skin side sheet 231. good too.

<<Regarding the high pressure area 60>>
FIG. 5 is a schematic plan view of the front belt portion 21. FIG. 6 is a schematic plan view of the rear belt portion 22. FIG.

The front belt portion 21 and the rear belt portion 22 have a waist elastic region 40 , a low pressure region 50 , and a high pressure region 60 in waist regions 211 and 221 overlapping the locking portion 24 in the vertical direction.

The waist stretchable region 40 is a stretchable region along the edge of the waist opening 1a, and a plurality of rubber threads 41 stretchable in the horizontal direction of the diaper 1 are arranged at intervals in the vertical direction. The waist elastic region 40 may have a configuration in which the elastic nonwoven fabrics 215 and 225 are not arranged as shown in FIG. good too.

The low pressure area 50 and the high pressure area 60 are areas arranged below the waist elastic area 40, are adjacent to each other, and have elasticity in the left-right direction. The low-pressure region 50 is a region in which the stretchable nonwoven fabrics 215, 225 are arranged between the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224. The high-pressure region 60 is a region in which the stretchable nonwoven fabrics 215, 225 and the stretchable film 65 are arranged between the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224. As shown in FIG. The stretchable film 65 is a sheet that stretches at least in the horizontal direction of the diaper 1 .

As the stretchable film 65, an elastic member having stretchability in the form of a sheet of uniform thickness obtained by melting an elastomer resin such as urethane or styrene can be exemplified. Alternatively, for example, a stretchable film in which polyolefin layers are integrated on the front and back surfaces of an elastomer layer may be used. When this elastic film is used, since the polyolefin layer does not have elasticity, the film can be stretched in advance to exhibit elasticity. The presence of the polyolefin layer on the surface has the advantage of making it easier to weld with the polyolefin fiber nonwoven fabric.

The high pressure region 60 has a higher tightening pressure when the diaper is put on than the low pressure region 50 due to the arrangement of the elastic film 65 . More specifically, the force for extending the high pressure region 60 having a unit width in the vertical direction by a unit length in the horizontal direction is the force for extending the low pressure region 50 having a unit width in the vertical direction by a unit length in the horizontal direction. Greater than force. That is, the contractile force acting in the horizontal direction in the high-pressure region 60 with a unit width in the vertical direction is greater than the contractive force acting in the horizontal direction in the low-pressure region 50 with a unit width in the vertical direction. Adhere strongly.

However, the elastic film 65 is not limited to being arranged over the entire high pressure region 60 . For example, as shown in FIGS. 5 and 6, a plurality of stretchable films 65a to 65f and 65A to 65F extending in the horizontal direction may be arranged at intervals in the vertical direction. In that case, among the plurality of elastic films 65 arranged in the same shape (same locus), the upper end of the uppermost elastic film 65, the lower end of the lowermost elastic film 65, A region surrounded by a pair of locking portions 24 is defined as one high pressure region.

Specifically, as shown in FIG. 5, the front belt portion 21 includes a “first high pressure region 61” ( abcd) and a “second high pressure region 62” (region surrounded by efgh) in which three horizontal elastic films 65d to 65f are arranged in the left-right direction of the diaper 1.

On the other hand, as shown in FIG. 6, the rear belt portion 22 has a "third high pressure area 63" (surrounded by ijkl) in which three upwardly convex elastic films 65A to 65C are arranged. and a “fourth high pressure region 64” (region surrounded by mnop) in which three horizontal elastic films 65D to 65F are arranged in the lateral direction of the diaper 1. FIG.

Further, in the front belt portion 21 and the rear belt portion 22 of the present embodiment, stretchable nonwoven fabrics 215 and 225 are arranged over the entire area below the waist stretchable region 40 (see FIG. 3). Therefore, of the waist area 211 of the front belt portion 21 and the area below the waist stretchable area 40, the area other than the first high pressure area 61 and the second high pressure area 62 is designated as the low pressure area 50. do. Similarly, of the waist region 221 of the rear belt portion 22 and the region below the waist elastic region 40, the region other than the third high pressure region 63 and the fourth high pressure region 64 is a low pressure region. 50. However, when the front belt portion 21 and the rear belt portion 22 have the leg rubber thread 27 along the leg opening 1b, the portion where the leg rubber thread 27 is disposed shall be excluded from the low pressure region 50. do.

A force for extending the high pressure region 60 with a unit width in the vertical direction by a unit length in the horizontal direction and a force for extending the low pressure region 50 with a unit width in the vertical direction by a unit length in the horizontal direction. may be compared by a well-known method. For example, all or part of the high pressure region 60 and the low pressure region 50 are cut out from the rear belt portion 22 or the front belt portion 21 as samples. Then, the average value of the vertical length of each sample is calculated. Also, both ends of the sample corresponding to the lateral direction of the diaper 1 are sandwiched between chucks of a tensile tester. The load obtained when the sample is stretched with the chucks separated by a unit length is measured. Then, it is preferable to compare the values obtained by dividing the load of each sample by the average value of the vertical length of each sample. When the low pressure region 50 is cut out in a range including the portion where the leg rubber thread 27 is arranged, the load is measured in a state in which the leg rubber thread 27 does not develop stretchability.

Moreover, the high-pressure region 60 only needs to have a higher clamping pressure than the low-pressure region 50 , and is not limited to the configuration in which the stretchable nonwoven fabrics 215 and 225 are laminated with the stretchable film 65 . For example, over a wide range of the front belt portion 21 and the rear belt portion 22, the thread-like elastic members are arranged at intervals in the vertical direction to form the low pressure region 50, and in the region where the high pressure region 60 is formed, , another stretchable member (stretchable film, stretchable nonwoven fabric, thread-like elastic member, etc.) may be placed over the thread-like elastic member. On the contrary, a sheet-like elastic member (elastic film, elastic nonwoven fabric) is arranged over a wide range of the front belt portion 21 and the rear belt portion 22 to form the low pressure area 50, and the high pressure area 60 A thread-like elastic member may be arranged so as to overlap the sheet-like stretchable member at the site where the is formed. In addition, the elastic film is arranged over a wide range of the front belt portion 21 and the rear belt portion 22 to form the low pressure area 50, and the area forming the high pressure area 60 is overlapped with the elastic film. A sheet-like stretchable member (stretchable film, stretchable nonwoven fabric) may be placed on the substrate. Also, the configuration of the low pressure region 50 and the high pressure region 60 may be the same, and the stretch ratio of the stretchable member in the high pressure region 60 may be higher than the stretch ratio of the stretchable member in the low pressure region 50 .

As described above, the front belt portion 21 and the rear belt portion 22 are partially provided with the high pressure region 60 . Therefore, the high pressure region 60 can tighten the places where the wearer should be tightened (for example, places to prevent the diaper 1 from slipping down, places to support the movement of the wearer, etc.). The low pressure region 50 also has stretchability. Therefore, the low-pressure region 50 can be brought into close contact with the wearer in areas other than those to be tightened. Therefore, the fit of the diaper 1 can be improved while preventing excessive tightening of the wearer.

Furthermore, in the diaper 1 of the present embodiment, the skin-side sheets 213, 223, the non-skin-side sheets 214, 224, and the elastic nonwoven fabrics 215, 225 are white sheets, and the elastic film 65 is a colored sheet (for example, purple). , blue, pink, etc.). That is, the color of the elastic film 65 is made different from the color of the other sheets. By doing so, when the front belt portion 21 and the rear belt portion 22 are viewed from at least one of the non-skin side and the skin side, part of the high pressure region 60 having the elastic film 65 is a low pressure region. It becomes a different color from 50.

By making the high pressure region 60 visible in this way, the user (wearer or caregiver) of the diaper 1 can grasp the position of the high pressure region 60 on the diaper 1 . Therefore, the user can adjust how much the diaper 1 is pulled up while confirming that the high pressure region 60 is located at the place where the wearer should be tightened. As a result, the diaper 1 is properly worn by the wearer at an appropriate position, and the effects of the high pressure region 60 (prevention of the diaper 1 from slipping down, support for movement of the wearer, etc.) can be obtained. In addition, it is possible to prevent the high pressure region 60 from being located in a place where the wearer should not be tightened (for example, the bulging portion of the lower abdomen and buttocks), and the wearing comfort of the diaper 1 being lowered.

More preferably, when the front belt portion 21 and the rear belt portion 22 are viewed from at least one of the non-skin side and the skin side, the outline of the high pressure region 60 in the vertical direction of the diaper 1 is aligned with the low pressure region 50. It should be a different color. For example, in the case of the first high pressure region 61 of the front belt portion 21, the colored elastic film 65a is positioned at the upper end and the colored elastic film 65c is positioned at the lower end. The second to fourth high pressure areas 62 to 64 are similarly provided with colored elastic films 65 at their upper and lower ends.

By doing so, the boundary between the high pressure area 60 and the low pressure area 50 becomes clear, and the user can more easily grasp the position of the high pressure area 60 . Therefore, the diaper 1 can be easily worn on the wearer at an appropriate position.

At least a portion of the high pressure region 60 and the low pressure region 50 may be of different colors, and a portion of the high pressure region 60 other than the contour may be of a different color. All regions may be of different colors. Also, the high pressure region 60 is not limited to being colored. That is, the material forming the high pressure region 60 may be white, and the material forming the low pressure region 50 may be colored. Also, the high pressure region 60 and the low pressure region 50 may be colored in different colors other than white.

FIG. 7 is a table showing test results for the visibility of the high pressure region 60. As shown in FIG. A test was conducted to find out specifically how much color difference the high pressure region 60 and the low pressure region 50 have in different colors to determine the position of the high pressure region 60 . First, samples 1 to 6 of belt portions having various configurations were prepared. The configurations of samples 1 to 6 are as follows.

In Sample 1, the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224 are made of spunbond nonwoven fabric with a basis weight of 27 g/m ² . As the stretchable nonwoven fabrics 215 and 225, those having a basis weight of 28 g/m ² and an elongation ratio of 2.3 were used. In addition, a dark beige elastic film 65 is arranged partially between the non-skin side sheets 214 and 224 and the elastic nonwoven fabrics 215 and 225 . The arrangement of the elastic film 65 is the arrangement shown in FIG. 2 (the same applies to other samples).

In sample 2, the color of the elastic film 65 was light beige, and the other configurations were the same as in sample 1.

In sample 3, the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224 are made of spunbond nonwoven fabric with a basis weight of 20 g/m ² . As the stretchable nonwoven fabrics 215 and 225, those having a basis weight of 28 g/m ² and an elongation ratio of 2.3 were used. In addition, a dark beige elastic film 65 is arranged partially between the non-skin side sheets 214 and 224 and the elastic nonwoven fabrics 215 and 225 .

In sample 4, the color of the elastic film 65 was light beige, and the other configurations were the same as those of sample 3.

Sample 5 uses a spunbond nonwoven fabric with a basis weight of 19 g/m ² and a lower content of white pigment (titanium oxide) than Samples 1 to 4 as skin-side sheets 213, 223 and non-skin-side sheets 214, 224. did. As the stretchable nonwoven fabrics 215 and 225, those having a basis weight of 28 g/m ² and an elongation ratio of 2.3 were used. In addition, a dark beige elastic film 65 is arranged partially between the non-skin side sheets 214 and 224 and the elastic nonwoven fabrics 215 and 225 .

In sample 6, the color of the elastic film 65 was light beige, and the other configurations were the same as in sample 5.

Then, the subjects were asked to evaluate whether the high pressure region 60 and the low pressure region 50 could be discriminated when the samples 1 to 6 were viewed from the skin side and from the non-skin side. The samples 1 to 6 were put on a doll of an appropriate size and evaluated by the subjects. If the high-pressure region 60 and the low-pressure region 50 can be distinguished from each other, they are evaluated as “○”; if they can be distinguished but are difficult to understand, “Δ”; Since Diaper 1 is an adult diaper, subjects (A to E) were five adult males and females in their 30s to 50s. The test was conducted indoors under a fluorescent lamp (illuminance of 407Lx), with the horizontal distance between Samples 1 to 6 and the test subject being 40 cm.

Further, the color difference ΔE ^* between the high pressure region 60 and the low pressure region 50 was measured when the samples 1 to 6 were viewed from the skin side and from the non-skin side, respectively.

The color difference ΔE ^* was measured using a color difference meter (this time, a color difference meter ZE-6000 manufactured by Nippon Denshoku Industries Co., Ltd.). The measurement method was reflection, and the diameter of the sample opening was 30 mm. First, a sample to be measured (belt portion of diaper 1) was placed in a natural state. When measuring the color difference ΔE ^* from the non-skin side, the sample was placed with the non-skin side up, and when measuring the color difference ΔE ^* from the skin side, the sample was placed with the skin side up. .

Measurements were then taken at random multiple locations (five locations in this case) in the high pressure region 60 to obtain respective measurement results (a ^{* and b* values} in the L ^* a ^* b ^* color system). An average value of the measurement results at a plurality of locations was used as the measurement result for the high pressure region 60 . Similarly, measurements were taken at random multiple locations (five locations in this case) in the low pressure region 50, and the respective measurement results (a ^* value, b ^* value) were obtained. An average value of the measurement results at a plurality of locations was used as the measurement result for the low pressure region 50 .

In addition, when the high pressure region 60 has a part with a color different from that of the low pressure region 50 (the part where the colored elastic film 65 is arranged), a measurement in which a different color part from the low pressure region 50 and a non-different color part are mixed Let the point fall within a random set of measurement points.

Then, based on the measurement result of the high pressure region 60 and the measurement result of the low pressure region 50, the color difference ΔE ^* is calculated by the following formula.
ΔE ^* = [(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2

Note that the general definition of color difference also includes the L ^* value (brightness). However, in the case of diapers, the L ^* value tends to change due to the difference in the number of laminated nonwoven fabrics, resulting in a change in color difference. Therefore, the color difference calculated including the L ^* value may deviate from the color difference actually seen with the naked eye. Therefore, the color difference ΔE ^* is calculated by excluding the L ^* value.

The above test results are summarized in the table of FIG. Regarding the color difference ΔE ^* (sample) in which all subjects (A to E) were able to distinguish between the high pressure region 60 and the low pressure region 50 (○), the visibility of the high pressure region 60 was evaluated as "○". From the results in the table, when the color difference ΔE ^* is "1.45" or more, the visibility of the high pressure region 60 is "◯".

Therefore, when the front belt portion 21 and the rear belt portion 22 are viewed from at least one of the non-skin side and the skin side, in the high pressure region 60 and the low pressure region 50, the L ^* a ^* b ^* color system When the difference in a ^* value is Δa ^* and the difference in b ^* value is Δb ^* , the color difference ΔE ^* is calculated by the following formula:
ΔE ^* = [(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2
The color difference ΔE ^* is preferably 1.45 or more.

By doing so, the high pressure area 60 and the low pressure area 50 can be easily distinguished, and the user can easily grasp the position of the high pressure area 60 . Therefore, the diaper 1 can be easily worn on the wearer at an appropriate position. The color difference ΔE ^* is measured by the method described in the above test or an equivalent method.

Further, so far, when the front belt portion 21 and the rear belt portion 22 are viewed from at least one of the non-skin side and the skin side, the high-pressure area 60 and the low-pressure area 50 may have different colors. . However, more preferably, when the front belt portion 21 and the rear belt portion 22 are viewed from the non-skin side (outside), at least a portion of the high pressure region 60 and the low pressure region 50 have different colors. That is, the color difference ΔE ^* between the high pressure area 60 and the low pressure area 50 should be 1.45 or more.

By doing so, it becomes easier for the user to recognize that the diaper 1 has the high pressure region 60 , and the user can easily wear the diaper 1 while being conscious of the high pressure region 60 . In addition, since the position of the high pressure region 60 can be grasped from the non-skin side, it becomes easier to align the high pressure region 60 with the place to be tightened on the wearer. Therefore, the diaper 1 can be easily worn on the wearer at an appropriate position.

Moreover, it is preferable that the stretchable member forming the high pressure region 60 , that is, the stretchable film 65 in this embodiment is colored in a color different from that of the low pressure region 50 . By doing so, the area that the user perceives as the high pressure area 60 matches the area where the tightening pressure is actually high. Therefore, the elastic film 65 is aligned with the place where the wearer should be tightened, and the effect of the high pressure region 60 can be easily obtained.

However, it is not limited to the above. At least one of the other materials (skin-side sheets 213, 223, non-skin-side sheets 214, 224, stretchable nonwoven fabrics 215, 225) arranged in the high-pressure region 60 is colored in a different color from the low-pressure region 50. may be In this case, for example, even when the stretchable films 65 are arranged intermittently in the vertical direction, the entire high pressure region 60 can be colored. Further, even when the elastic film 65 is arranged over the entire high pressure region 60, a portion of the high pressure region 60 (for example, the contour portion) can be colored.

Further, when the elastic film 65 is colored, the elastic film 65 is arranged on the non-skin side of the plurality of materials laminated in the thickness direction of the front belt portion 21 and the rear belt portion 22. preferably. In this embodiment, as shown in FIG. 3, the elastic film 65 is arranged between the non-skin-side sheets 214, 224 and the elastic nonwoven fabrics 215, 225. As shown in FIG.

By doing so, the visibility of the high pressure area 60 from the non-skin side is enhanced. Therefore, the high pressure region 60 is easily recognized by the user, and the high pressure region 60 is easily aligned with the place where the wearer should tighten. However, it is not limited to the above, and the elastic film 65 may be arranged closer to the skin side sheets 213 and 223 than the non-skin side sheets 214 and 224 .

Moreover, the colored elastic member forming the high pressure region 60 is preferably a sheet-like elastic member like the elastic film 65 of the present embodiment. By doing so, the area of the different color portion, which is a color different from that of the low pressure region 50, becomes larger than when the stretchable member is rubber thread. Therefore, the high pressure area 60 is conspicuous and easily recognized by the user. It also makes it easier to align the high pressure region 60 where it should be tightened on the wearer.

Moreover, when the stretchable member forming the high-pressure region 60 is a sheet-shaped stretchable member, the surface of the high-pressure region 60 can be tightly adhered to the wearer, and local tightening can be prevented. Therefore, the diaper 1 can be comfortable to wear, and the elastic member hardly leaves marks on the wearer's skin.

Moreover, it is preferable that a plurality of colored stretchable members (stretchable films 65) forming the high-pressure region 60 are arranged at intervals in the vertical direction. By doing so, a striped pattern is formed in the high pressure region 60 , and the striped pattern becomes an accent that stands out, making it easier for the user to recognize the high pressure region 60 . In addition, by partially coloring the high pressure area 60, it is possible to prevent the user from recognizing that the diaper 1 is too tightly tightened.

FIG. 8 is an explanatory diagram of the joint portion 30 formed in the elastic film 65. As shown in FIG. As shown in FIG. 4B described above, the colored elastic film 65 is a sheet arranged on the non-skin side of the elastic film 65 (the non-skin side sheets 214 and 224 in the case of this embodiment). , are intermittently joined by a plurality of joints 30 .

By doing so, the non-skin side sheets 214 and 224 are lifted from the elastic film 65 between the joint portions 30, and wrinkles (unevenness) are generated by the non-skin side sheets 214 and 224. Therefore, it is possible to prevent the elastic film 65 from becoming too conspicuous while making the elastic film 65 visible. That is, the hardness of the elastic film 65 can be reduced by wrinkles. Therefore, the impression that the diaper 1 is soft and comfortable to wear can be given to the user.

Furthermore, as shown in FIG. 8, the interval W2 between the joints 30 adjacent to each other in the vertical direction is smaller than the length (width) W1 of the elastic film 65 in the vertical direction (W1>W2). It is preferable that the interval L0 between the joint portions 30 adjacent to each other in the left-right direction is smaller than the length of the elastic film 65 in the direction (in this embodiment, the length between the pair of locking portions 24).

By doing so, a plurality of joints 30 are arranged within the range of the elastic film 65 in the vertical direction, and a plurality of joints 30 are arranged within the range of the elastic film 65 in the lateral direction. Therefore, the non-skin side sheets 214 and 224 cause finer wrinkles. Therefore, the impression that the diaper 1 is soft and comfortable to wear can be given to the user.

However, the elastic film 65 is not limited to the above, and the entire stretchable film 65 may be joined to the non-skin-side sheets 214 and 224 . In that case, the elastic film 65 is conspicuous and the visibility of the high pressure area 60 is enhanced.

When comparing the length of the elastic film 65 and the interval between the joint portions 30, it is preferable to compare the front belt portion 21 and the rear belt portion 22 in a stretched state without wrinkles. Specifically, the dimensions of the members (for example, the skin-side sheets 214, 224, etc.) constituting the front belt portion 21 and the rear belt portion 22 are elongated until they match or are close to the dimensions of the individual members. state. The same applies to comparisons of other lengths and positions, which will be described later.

Further, when part of the high pressure region 60 has a different color from the low pressure region 50, the high pressure region 60 has a different color portion 66 (a portion where the elastic film 65 is arranged), which is a different color from the low pressure region 50. It has a non-unique color portion 67 other than the unique color portion 66 . In this case, in at least one of the front belt portion 21 and the rear belt portion 22, it is preferable that the ratio of the different color portion 67 per unit area is higher in the central portion in the left-right direction than in the end portions.

For example, as shown in FIG. 5 , in the front belt portion 21 , the first high pressure region 61 and the second high pressure region 62 partially overlap each other in the center portion in the left-right direction, and the end portions in the left-right direction , the first high pressure region 61 and the second high pressure region 62 are separated. Therefore, the rate of the different color portion 67 per unit area is high in the central portion in the left-right direction. The rear belt portion 22 is also the same.

The central portion in the left-right direction of the front belt portion 21 and the rear belt portion 22 is more likely to attract the user's attention than the end portions. The area 60 is easily recognized by the user. However, it is not limited to the above, and for example, the ratio of the unique color portion 66 per unit area may be constant, or may be higher at both ends in the left-right direction than at the central portion.

As shown in FIGS. 5 and 6, the vertical length L1 from the upper end 60a of the high pressure region 60 located at the center of the front belt portion 21 in the left-right direction to the waist opening 1a is equal to the length L1 of the rear belt. It may be different from the vertical length L2 from the upper end 60a of the high pressure region 60 located in the center of the portion 22 in the left-right direction to the waist opening 1a.

By doing so, the user can determine the front and back of the diaper 1 based on the vertical position of the visible high pressure region 60 . Therefore, the diaper 1 is properly worn in the front and back.

Regarding the ratio of the different color portion 67 per unit area and the relationship between the length (L1, L2) from the high pressure region 60 to the waist opening 1a, at least the pair of locking portions 24 (belt portion Both ends in the left-right direction) and the center of the pair of engaging portions 24 (center portion in the left-right direction of the belt portion). Preferably, it is established at both ends of the 1/3 length between the pair of locking portions 24 and the central portion therebetween.

Also, the high pressure region 60 preferably has a higher contraction rate than the low pressure region 50 . The contraction rate is defined as the length in the left-right direction when the high-pressure region 60 and the low-pressure region 50 are stretched in the left-right direction without wrinkles, and the length in the left-right direction in the natural state of the high-pressure region 60 and the low-pressure region 50. It is a value calculated by the following formula “(ab)/a×100(%)” where b is the length. By doing so, when the high pressure region 60 is colored, the color of the high pressure region 60 becomes relatively dark in the natural state of the diaper 1 . Therefore, the high pressure area 60 can be easily recognized by the user.

Also, the light transmittance of the sheet other than the colored sheet (here, the elastic film 65) in the high pressure region 60 should be relatively high (for example, 50% or more). In addition, the amount of white pigment (for example, titanium oxide) contained in sheets other than the colored sheet may be reduced (for example, less than 10%). By doing so, the colored sheet can be easily seen through the non-skin side and the skin side of the front belt portion 21 and the rear belt portion 22, and the high pressure area 60 can be easily recognized by the user.

Next, the shapes of the first to fourth high pressure regions 61 to 64 will be specifically described.
As shown in FIG. 5 , the first high pressure region 61 of the front belt portion 21 is arranged continuously in the left-right direction across the pair of locking portions 24 . The central portion of the direction is positioned lower than the both end portions. More specifically, the first high-pressure region 61 gradually slopes downward from both ends in the left-right direction toward the center.

Therefore, it is possible to prevent the abdomen of the wearer from being excessively tightened by the first high-pressure region 61 . In addition, since the low-pressure region 50 can be brought into close contact with the wearer's abdomen, the diaper 1 can be comfortably worn. In addition, the vicinity of the anterior superior iliac spine of the wearer can be tightened at both ends in the left-right direction of the first high-pressure region 61, thereby suppressing displacement of the diaper 1 when worn.

In addition, the second high-pressure region 62 of the front belt portion 21 is also arranged continuously in the left-right direction across the pair of locking portions 24, and both ends of the second high-pressure region 62 in the left-right direction are , is positioned below the first high pressure region 61 , and at least a portion of the center portion in the left-right direction of the second high pressure region 62 overlaps with the first high pressure region 61 .

In other words, the central portion of the second high pressure region 62 in the left-right direction is positioned relatively lower, similar to the first high pressure region 61 . Therefore, it is possible to prevent the wearer's abdomen from being excessively tightened by the second high-pressure region 62 . In addition, both lateral end portions of the second high pressure region 62 can be tightened so as to support the anterior superior iliac spine of the wearer from below, thereby suppressing displacement of the diaper 1 when worn.

On the other hand, as shown in FIG. 6, the third high-pressure region 63 of the rear belt portion 22 is arranged continuously in the left-right direction between the pair of locking portions 24, and is the third high-pressure region. The central portion of 63 in the left-right direction is located above both end portions. Specifically, the third high-pressure region 63 is gradually inclined upward from both ends in the left-right direction toward the central portion.

Therefore, it is possible to prevent the third high-pressure region 63 from excessively tightening the center of the buttocks where the wearer moves a lot. In addition, since the low-pressure region 50 can be brought into close contact with the center of the buttocks of the wearer, the diaper 1 can be comfortably worn. In addition, if the high pressure area 60 is positioned at the center of the buttocks, the position of the high pressure area 60 may be displaced due to the movement or swelling of the center of the buttocks, and as a result, the diaper 1 may be displaced. On the other hand, the third high-pressure region 63 is arranged so as to partially surround the central part of the buttocks from above, and therefore is less likely to be misaligned. Further, similarly to the second high-pressure region 62, both lateral end portions of the third high-pressure region 63 can be tightened so as to support the anterior superior iliac spine of the wearer from below. 1 can be suppressed.

In addition, the fourth high pressure region 64 of the rear belt portion 22 is also arranged continuously in the left-right direction between the pair of locking portions 24, and both ends of the fourth high-pressure region 64 in the left and right direction are arranged. is positioned above the third high pressure region 63 , and at least a portion of the center portion in the left-right direction of the fourth high pressure region 64 overlaps with the third high pressure region 63 .

In other words, the central portion of the fourth high-pressure region 64 in the left-right direction is positioned relatively upward, similar to the third high-pressure region 63 . Therefore, it is possible to prevent the fourth high pressure region 64 from excessively tightening the center of the wearer's buttocks. In addition, since both ends of the fourth high-pressure region 64 in the left-right direction are located relatively upward, the vicinity of the wearer's anterior superior iliac spine can be tightened in the same manner as the first high-pressure region 61. Displacement of the diaper 1 when worn can be suppressed.

Regarding the positional relationship of the first to fourth high pressure regions 61 to 64, at least the pair of locking portions 24 (both ends of the high pressure region in the left-right direction) and the center of the pair of locking portions 24 (high It is preferable that this holds at the center of the pressure area in the left-right direction. Preferably, it is established at both ends of the 1/3 length between the pair of locking portions 24 and the central portion therebetween.

Further, in the locking portion 24, the first high pressure region 61 and the fourth high pressure region 64 may be partially or entirely aligned in the vertical direction. Similarly, in the locking portion 24, the second high pressure region 62 and the third high pressure region 63 may be partially or entirely aligned in the vertical direction. In doing so, an annular high pressure region 60 is formed. Therefore, the diaper 1 fits around the waist of the wearer, and displacement of the diaper 1 can be suppressed.

In addition, the lower end of the fourth high pressure region 64 is located above the lower end of the first high pressure region 61 at the center of the front belt portion 21 and the rear belt portion 22 in the left-right direction. The lower end of the region 63 is arranged above the lower end of the second high pressure region 62 . As a result, the lower abdomen can be tightened obliquely upward, and intra-abdominal pressure can be increased. Therefore, the function of the muscles around the pelvis (such as abdominal muscles) can be assisted, and the pelvis can be stabilized.

In addition, in the rear belt 22, the length in the vertical direction from the upper end of the fourth high pressure region 64 to the lower end of the third high pressure region 63 is longer at both ends in the left and right direction than at the central portion, and , the lower ends of the third high-pressure regions 63 are positioned downward. Furthermore, the lower end of the third high-pressure region 63 is gradually inclined downward from the central portion in the left-right direction of the rear belt portion 22 toward both end portions. In other words, the third and fourth high pressure regions 63 and 64 are arranged in accordance with the shape of the gluteus medius. Therefore, when the diaper 1 is worn, the third and fourth high pressure regions 63 and 64 can tighten the gluteus medius of the wearer, and assist the movement of the gluteus medius. As a result, the pelvis during movement such as walking is stabilized, and the movement (walking) of the wearer can be supported.

In the diaper 1 of the present embodiment, the high pressure region 60 that matches the body shape of the wearer as described above is made visible in a color different from that of the low pressure region 50 . Therefore, the user can wear the diaper 1 at the wearer's position where it is easy to move, is comfortable to wear, and is unlikely to be displaced. Therefore, the effect of the high pressure region 60 can be obtained more reliably.

However, the high-pressure areas 60 shown in FIGS. 5 and 6 are only examples, and the number, shape, arrangement, etc. of the high-pressure areas 60 are not particularly limited. For example, the diaper 1 may have any one or more of the first to fourth high pressure regions 61-64. Also, only one of the front belt portion 21 and the rear belt portion 22 may have the high pressure region 60 and the other may not have the high pressure region 60 .

Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. Further, 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.

1 diapers (underpants-type disposable diapers),
1a waist opening, 1b leg opening,
10 absorbent body, 11 absorbent core,
12 top sheet, 13 back sheet,
20 outer body,
21 front belt portion (belt portion), 22 rear belt portion (belt portion),
213, 223 skin side sheet, 214, 224 non-skin side sheet,
215, 225 elastic nonwoven fabrics,
23 Crotch part 24 Locking part 27 Thread rubber around leg
30 junctions,
40 waist stretchable region (stretchable region), 41 thread rubber,
50 low pressure region,
60 high pressure area,
61 first high pressure region, 62 second high pressure region,
63 third high pressure region, 64 fourth high pressure region,
65 elastic film (elastic member),
66 unique color portion, 67 non-unique color portion,

Claims (13)

having a vertical direction, a horizontal direction, and a front-back direction that intersect each other;
A pants-type disposable diaper having a belt portion and an absorbent body,
The belt portion has a low pressure area and a high pressure area below the stretchable area along the edge of the waist opening,
The low-pressure area and the high-pressure area are adjacent to each other and have elasticity in the left-right direction,
The force for extending the high-pressure region having a unit width in the vertical direction by a unit length in the horizontal direction is the force for extending the low-pressure region having a unit width in the horizontal direction by the unit length. larger than
When the belt portion is viewed from at least one of the non-skin side and the skin side, the contour portion of the high pressure area in the vertical direction has a different color from the low pressure area,
When the belt portion is viewed from at least one of the non-skin side and the skin side,
In the high pressure region and the low pressure region, if the difference in a ^* value in the L ^* a ^* b ^* color system is Δa ^* and the difference in b ^* value is Δb ^* , the color difference ΔE ^* is calculated by the following formula:
ΔE ^* = [(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2
The color difference ΔE ^* is 1.45 or more,
the low pressure area is a single color;
The low pressure region is imparted with stretchability by a member having stretchability provided in the low pressure region,
The high pressure region has a different color portion that is a single color different from the single color of the low pressure region, and a non-unique color portion other than the different color portion and having the same single color as the single color of the low pressure region. ,
The belt portion has a front belt portion and a rear belt portion,
Both side portions of the front belt portion in the left-right direction and both side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions,
The unique color portion is arranged continuously in the left-right direction across the pair of locking portions,
A pants-type disposable diaper characterized by: The pants-type disposable diaper according to claim 1 ,
When the belt portion is viewed from the non-skin side,
A pants-type disposable diaper, wherein the color difference ΔE* is 1.45 or more. The pants-type disposable diaper according to claim 1 or 2 ,
The high-pressure area has an elastic member that expands and contracts in the left-right direction,
The underpants-type disposable diaper, wherein the elastic member is colored in a color different from that of the low pressure region. The pants-type disposable diaper according to claim 3 ,
In the high pressure region, a plurality of materials are laminated in the thickness direction of the belt portion,
The underpants-type disposable diaper, wherein the stretchable member is arranged closer to the non-skin side. The pants-type disposable diaper according to claim 3 or 4 ,
The underpants-type disposable diaper, wherein the elastic member is a sheet-like elastic member. The pants-type disposable diaper according to any one of claims 3 to 5 ,
The underpants-type disposable diaper, wherein a plurality of the stretchable members are arranged in the high-pressure region at intervals in the vertical direction. The underpants-type disposable diaper according to any one of claims 3 to 6 , wherein the elastic member is formed by a sheet arranged on the non-skin side of the elastic member and a plurality of joints. intermittently joined,
The distance between the joints adjacent to each other in the vertical direction is smaller than the length of the elastic members in the vertical direction, and the length of the elastic members adjacent to each other in the horizontal direction is smaller than the length of the elastic members in the horizontal direction. An underpants-type disposable diaper, wherein the distance between the joints is smaller. The pants-type disposable diaper according to any one of claims 1 to 7 ,
The high pressure region has a different color portion having a color different from that of the low pressure region and a non-unique color portion other than the different color portion,
An underpants-type disposable diaper, wherein a ratio of the different-colored portion per unit area is higher in the central portion of the belt portion in the left-right direction than in the end portions. The pants-type disposable diaper according to any one of claims 1 to 8 ,
The belt portion has a front belt portion and a rear belt portion,
The length in the vertical direction from the upper end of the high pressure region located at the center in the left-right direction of the front belt portion to the opening around the waist is the above-mentioned length located at the center in the left-right direction of the rear belt portion. A pants-type disposable diaper, wherein the vertical length from the upper end of the high-pressure region to the waist opening is different. The pants-type disposable diaper according to any one of claims 1 to 9 ,
The belt portion has a front belt portion and a rear belt portion,
Both side portions of the front belt portion in the left-right direction and both side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions,
The high pressure region has a first high pressure region in the front belt portion,
The first high-pressure region is arranged continuously in the left-right direction across the pair of locking portions,
The underpants-type disposable diaper, wherein the central portion of the first high-pressure region in the left-right direction is positioned lower than both end portions. The pants-type disposable diaper according to claim 10 ,
The high pressure region has a second high pressure region in the front belt portion,
The second high-pressure region is arranged continuously in the left-right direction across the pair of locking portions,
Both ends of the second high-pressure region in the left-right direction are positioned below the first high-pressure region,
An underpants-type disposable diaper, wherein at least a portion of the lateral center of the second high-pressure area overlaps with the first high-pressure area. The pants-type disposable diaper according to any one of claims 1 to 11 ,
The belt portion has a front belt portion and a rear belt portion,
Both side portions of the front belt portion in the left-right direction and both side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions,
The high pressure region has a third high pressure region in the rear belt portion,
The third high-pressure region is arranged continuously in the left-right direction across the pair of locking portions,
The underpants-type disposable diaper, wherein the central portion of the third high-pressure region in the left-right direction is positioned above both end portions. 13. The pants-type disposable diaper according to claim 12 , wherein the high pressure region has a fourth high pressure region in the rear belt portion,
The fourth high-pressure region is arranged continuously in the left-right direction across the pair of locking portions,
Both ends of the fourth high-pressure region in the left-right direction are positioned above the third high-pressure region,
An underpants-type disposable diaper, wherein at least a portion of the lateral center of the fourth high-pressure area overlaps with the third high-pressure area.

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