TW201442693A - Disposable diaper - Google Patents

Abstract

A disposable diaper (10) has an absorbent core (40a) having wide sections and a narrow section wherein the length of the absorbent core in the width direction is shortest. Marker patterns (M11, M12), which indicate positions on the absorbent core, are attached to a back sheet positioned more on a non-skin-contact surface side than the absorbent core (40a). The marker patterns are disposed at positions that do not overlap with the outer edge of the absorbent core in a product width direction. At least a portion of each marker pattern in an overlapping region where the absorbent core and the back sheet overlap is disposed in a region further to the outside in the product width direction than an imaginary line (FL1), which passes through the outer edge of the narrow section in the product width direction and extends in a product longitudinal direction.

Description

Disposable disposable diaper

This invention relates to disposable diapers.

In the past, the front waist region, the rear waist region, and the underarm region have an absorbent core material that extends across the underarm region to the front waist region and the back waist region, and is disposed in the back waist region after being fastened. Paper diapers are well known. Patent Document 1 discloses that a disposable disposable diaper is provided on the surface of the clothing side of the disposable diaper (the outer surface when worn). The design of the disposable disposable diaper of this patent document is set to emphasize the shape of the absorbent core material (see, for example, paragraph 0045 of Patent Document 1).

Since the disposable diaper of Patent Document 1 is provided with a mark along the outer shape of the absorbent core material, the approximate position of the absorbent core material can be grasped based on the mark. Therefore, when the installer installs the disposable disposable diaper, the position of the absorbent core material can be grasped with the mark as the object.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2005-517494

However, the disposable disposable diaper described above has the following problems.

Since the mark of the disposable disposable diaper is arranged along the outline of the absorbent core material, the line of the end portion of the absorbent core in the width direction is emphasized. Therefore, for example, there may be an unaccustomed installer, which may cause it to be necessary to reliably arrange the outline of the absorbent core material along the wearer's body. Therefore, it is difficult for the installer who is not accustomed to grasp the alignment when the disposable diaper is installed, and the burden is felt in the alignment.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an outline of an absorbent core material that can be easily grasped even when it is unaccustomed to the installation, and can be reduced in installation. Disposable disposable diapers for the psychological burden of the alignment.

The disposable disposable diaper (the disposable disposable diaper 10) of the present invention has a front waistline region, a rear waistline region, and a crotch region between the front waistline region and the rear waistline region, and The product has a product length direction from the front waist region toward the rear waist region and a product width direction orthogonal to the product longitudinal direction, and further includes an absorbent core material that spans the crotch region and faces the front waist region And extending at least one of the rear waist region; a pair of buckles extending from the rear waist region toward both outer sides in the width direction of the product; impervious to liquid The back sheet is disposed closer to the non-skin contact surface side than the absorbent core member, and the exterior sheet is disposed closer to the non-skin contact surface side than the back sheet. The above-mentioned absorbent core material is characterized in that: the absorbent core material has a wide portion at both end portions of the absorbent core material in the longitudinal direction of the product; and the longitudinal direction of the product in the absorbent core material. In the narrow portion of the central portion and the shortest length of the absorbent core in the width direction, the back sheet is extended outward in the product width direction from the outer end portion of the absorbent core in the product width direction, and is more than the aforementioned The outer end portion of the absorbent core member extending in the longitudinal direction of the product extends outward in the longitudinal direction of the product, and the back sheet is provided with a marking pattern indicating the position of the absorbent core member, and the marking pattern is disposed so as not to overlap a position of the outer end portion of the absorbent core in the width direction of the product, at least a part of the marking pattern being disposed on the absorbent core The overlapping area and overlapping the back surface sheet, than by the article widthwise outer end portion of the narrow portion and an imaginary line extending in the longitudinal direction of the article towards the area closer to the outer side of the width direction of the article.

10‧‧‧Disposable disposable diapers

20‧‧‧ Front waist area

25‧‧‧胯下区域区

30‧‧‧After waist area

35‧‧‧foot opening

40‧‧‧ absorber

40a‧‧‧Absorbing core material

40b‧‧‧ core material cladding

41‧‧‧Rarrow width

42‧‧‧ Wide Width

43‧‧‧Intermediate

50‧‧‧ top sheet

60a‧‧‧back sheet

60‧‧‧Outer sheets

70‧‧‧Fringe

75‧‧‧foot expansion

80‧‧‧foot folds

90‧‧‧ buckle

200‧‧‧ Pants expansion joint

Fig. 1 is a developed plan view of the disposable disposable diaper of the present embodiment.

Figure 2 is a cross-sectional view of the disposable diaper used along the line F1-F1 shown in Figure 1.

Figure 3 is a cross-sectional view of the disposable diaper used along the line F2-F2 shown in Figure 1.

Figure 4 is a developed rear view of the disposable disposable diaper shown in Figure 1.

Next, an embodiment of the disposable disposable diaper 10 according to the present invention will be described with reference to the drawings. In the following description, the same or similar reference numerals are given to the same or similar parts. However, the figure is a schematic display, please note that the ratio of each size will be different from the real thing.

Therefore, the specific dimensions and the like should be judged by referring to the following description. Further, each of the drawings may include a difference in the relationship between the dimensions and the ratio of the dimensions.

(1) The overall schematic structure of disposable disposable diapers

Fig. 1 is a developed plan view of the disposable disposable diaper 10 of the present embodiment. Figure 2 is a cross-sectional view of the disposable diaper used along the line F1-F1 shown in Figure 1. Figure 3 is a cross-sectional view of the disposable diaper used along the line F2-F2 shown in Figure 1. Figure 4 is a developed rear view of the disposable disposable diaper shown in Figure 1. The expanded view shown in Figs. 1 and 4 is such that the elastic members 71 of the leg stretch portion 75 and the leg gathers 80 are stretched to the top sheet 50, the side flaps 70, and the like which constitute the disposable disposable diaper, and wrinkles are not formed. State diagram of the state.

The disposable disposable diaper 10 has a front waistline region 20, a crotch region 25, and a rear waistline region 30. The front waist area 20 is worn and worn The part of the user's front waist (abdomen part) that is in contact. Further, the rear waistline region 30 is a portion that comes into contact with the wearer's rear waistline portion (back portion). The underarm region 25 is located between the front waistline region 20 and the rear waistline region 30.

Further, the disposable disposable diaper 10 is formed with a pair of leg openings 35. The leg opening portion 35 is provided at the side end portion of the product disposable diaper in the width direction of the disposable diaper, and is disposed along the wearer's foot in a state where the disposable disposable diaper is worn by the wearer. Part of it.

In the present embodiment, the direction from the front waistline region 20 toward the rear waistline region 30 is referred to as the product longitudinal direction L, and the direction orthogonal to the product longitudinal direction L is referred to as the product width direction W.

The disposable disposable diaper 10 includes an absorber 40 that extends across the crotch region 25 and extends from the crotch region 25 toward at least one of the front waist region 20 and the rear waist region 30. The absorber 40 is composed of an absorbent core 40a and a core wrap layer 40b. The shape of the absorbent core material 40a is substantially an hourglass clock shape in a plan view, and the shape of the core material wrapping layer 40b is a rectangular shape.

The absorbent core material 40a has a wide portion 41 located at both end portions in the longitudinal direction of the product of the absorbent core member, and has a narrow width in the center portion of the absorbent core member in the longitudinal direction of the product and the shortest length in the width direction of the absorbent core member. The portion 42 is located between the wide portion 41 and the narrow portion 42 and has an intermediate portion 43 in which the length of the absorbent core in the width direction is increased from the narrow portion 42 toward the wide portion 41. In Fig. 1, a slight lock line is given to the boundary between the wide portion 41, the narrow portion 42, and the intermediate portion 43 to be displayed.

In addition, the wide width portion may include the region in which the width of the absorbent core member 40a is the widest, and the width of the absorbent core member 40a is narrowed toward the outer side in the longitudinal direction of the region where the width of the absorbent core member 40a is the widest. The situation in the region also includes the concept of the region.

The outer shape of the absorptive core material 40a has a shape that is along the shape of the wearer's foot and is a shape that does not interfere with the action of the wearer's foot. Specifically, the portion where the width of the absorbent core material is the narrowest is set to a position in the disposable disposable diaper that is 10 to 50 mm closer to the abdomen side than the center in the longitudinal direction of the product, and the narrow portion 42 on the side of the front waistline region. The boundary between the wide portion 41 and the wide portion 41 substantially coincides with the inner end portion of the target portion 95 in the longitudinal direction of the product. In the state in which the disposable disposable diaper is installed, the inner end portion of the fastener tape 90 in the longitudinal direction of the product is disposed in the vicinity of the inner end portion of the target portion 95 in the longitudinal direction of the product. The inner end portion of the buckle 90 in the longitudinal direction of the product is disposed so as to correspond to the root portion in a state in which the disposable disposable diaper is installed, and the distance between the wearer's feet is from the root portion of the foot. The lower side is narrowed. Therefore, the longitudinal end portion of the width narrow portion 42 of the absorbent core member 40a (the portion where the width of the absorbent core material starts to narrow) corresponds to the inner end portion of the longitudinal direction of the product to which the fastening tape 90 is fixed. The portion is such that the absorbent core 40a can be further configured along the wearer's body.

The absorbent core material 40a can be formed of the same material as that of the conventional disposable disposable diaper, and can be suitably configured using a known member such as pulverized pulp or a high-absorbent polymer. The absorbent core material 40a is wrapped around the clad layer 40b by a sheet-like core material.

The core wrapping layer 40b is a sheet covering the absorbent core 40a. A part of at least the skin surface side of the core wrapping layer 40b is composed of various fiber nonwoven fabrics or tissue sheets having liquid permeability. For example, a mass of about 10 ~ 30g / m ² of a hot air non-woven fibers, spunbond nonwoven fabric, SMS (spunbonded - melt-blown - spunbond) nonwoven fabric, or a mass of about 10 ~ 30g / m ² sheet of tissue.

A liquid permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40. Further, on the back side (non-skin contact surface side) of the absorber 40, a liquid-impermeable back sheet 60a is provided. The liquid-impermeable back sheet 60a is closer to the back side (non-skin contact surface side), and is provided with an outer sheet 60 made of a non-woven fabric. Moreover, the indicator 65 which is configured to change visually when it comes into contact with moisture is provided on the side of the back surface of the back sheet which is closer to the skin contact surface.

The side edge portions of the absorber 40 in the product width direction W are provided with the even side fins 70, respectively. The side panel 70 spans the front waistline region 20, the crotch region 25, and the rear waistline region 30, and is disposed closer to the outer side in the product width direction than the absorbent body 40. The side panel 70 is composed of one sheet or a nonwoven fabric in which a plurality of sheets or more are stacked. Further, each of the pair of side panels 70 is provided with a buckle 90.

The buckle belt 90 is formed as a pair, and extends in the rear waist region 30 along the product width direction W, and the disposable disposable diaper 10 is held by the non-skin abutting surface fixed to the front waistline region 20 On the wearer's body.

The target portion 95 is formed in a pair and is configured to be disposed at the front waist The non-skin abutting faces in the surrounding area are fixedly mounted by a pair of buckles 90, respectively.

In the present embodiment, the front waistline region 20, the rear waistline region 30, and the buckle 90 constitute a waistline holding portion. The waistline holding portion of the back waistline region 30 is a range extending from the region where the engaging member of the buckle 90 is provided in the width direction. The waistline holding portion of the front waistline region 20 is a range extending from the region where the target portion 95 is provided in the width direction.

Moreover, the disposable disposable diaper 10 is provided with the crotch expansion-contraction part 200 arrange|positioned in the area|region which overlaps the absorber of the crotch area|region 25. In addition, the structure of the crotch expansion-contraction part 200 is demonstrated in detail later.

The side panel 70 is provided with a pair of leg expansion and contraction portions 75 that are disposed on the inner side in the product width direction of the leg opening portion 35 and that can be extended and contracted in the product longitudinal direction L.

The leg stretchable portion 75 is longer in the longitudinal direction L of the product than the crotch stretchable portion 200, and is provided at a position outside the crotch expansion-contraction portion 200 in the product width direction W.

The leg expansion portion 75 is configured such that the leg opening portion 35 can be expanded and contracted in the longitudinal direction of the product, and can be disposed along the leg opening portion 35 or in a state in which a part of the leg opening portion 35 is inclined.

Further, the leg stretchable portion 75 is formed of a stretchable sheet, a linear rubber or the like. The leg stretchable portion 75 is a portion that can be stretched and contracted in the longitudinal direction of the product, and the portion in which the stretchable sheet is disposed in a state where the contraction force is not exerted is removed.

Moreover, it is inside the pair of leg expansion-contraction parts 75 (product width side To the center of W (close to the center), there is provided a pair of leg side wrinkles 80 extending in the longitudinal direction L of the product. The leg gathers 80 are provided at the inner end portions of the side panels 70 in the product width direction, and are disposed closer to the inner side in the product width direction than the leg stretch portions 75. The leg side wrinkles 80 are disposed at positions closer to the inner side in the product width direction than the leg stretch portion 75. The foot wrinkle 80 can be configured by a conventional structure, and specifically, can be configured by a sheet material different from the side panel 70.

Further, a waist elastic-contracting portion 85 that can expand and contract in the width direction of the product is provided between one of the fastener belts in the product width direction. The waist elastic portion 85 is contracted in the product width direction between the buckles.

In the present embodiment, the waist elastic-contraction portion 85 is formed of a stretchable sheet. The member constituting the waist elastic-contraction portion 85 is not particularly limited, but a member which is as thin as possible and has low bending rigidity and a small shrinkage ratio is preferably used. By forming the waist elastic-contraction portion 85 with a material having low bending rigidity, the waist elastic-contraction portion 85 is easily bent along the body, and the waist elastic-contraction portion 85 can be fitted along the body without applying a load to the wearer's body. Moreover, by forming the waist stretchable portion 85 with a material having a small neck-reduction ratio, it is possible to suppress shrinkage of the product in the longitudinal direction of the disposable diaper after the disposable diaper is stretched in the product width direction after use. The wearer's waistline can prevent the disposable disposable diaper from sliding down toward the underside of the chin.

In the present embodiment, a stretchable film having a basis weight of 20 to 45 g/m ² is used as the waist stretchable portion 85.

The waist stretchable portion 85 is heated by a hot melt adhesive or after being extended to a length of 1.5 to 2.5 times in a non-stretched state (natural state). Heat treatment or the like is followed by the exterior sheet 60.

In the present embodiment, the waist elastic-contraction portion 85 is disposed between the exterior sheet 60 and the back sheet 60a. However, the core stretchable portion 85 may be disposed on the core wrap layer 40b and the back sheet 60a or the outer sheet 60 in a structure in which the core wrapping layer 40b extends to the outer side in the longitudinal direction of the product more than the absorbent core member 40a. between. The position of the waist elasticized portion is not particularly limited. Further, the region in which the absorber is not disposed may be disposed between the side panel 70 and the back sheet 60a or the exterior sheet 60.

Further, the waist elasticized portion of the present embodiment is configured to expand and contract in the product width direction. However, the waist elasticized portion may be configured to expand and contract in the product width direction and the product longitudinal direction.

The buckle 90 is attached to a region of the side panels 70 corresponding to the rear waist region 30. The buckle 90 is provided with a base sheet 91 coupled to the side panel 70, and a hook sheet 92 provided with a plurality of engagement hooks (not shown) as engagement members, and is fixed to the base sheet 91. The hook sheet 92 is a region in which an engaging member is provided, and the waist holding portion is a region extending from the hook sheet 92 in the product width direction.

The hook sheet 92 is fixed to the base sheet 91, specifically, to the base sheet. The joining of the hook sheet 92 and the base sheet 91 is preferably such that the rigidity of the buckle 90 is not necessary. Specifically, it is preferable that the hook sheet 92 and the base sheet 91 are joined by a hot melt adhesive which is applied intermittently in a dot shape, a line shape or a spiral shape. Further, the hook sheet 92 and the base sheet 91 can be joined by heat sealing or the like.

The base sheet 91 is composed of one sheet or a nonwoven fabric in which a plurality of sheets or more are stacked. As the base sheet 91, a nonwoven fabric produced by a production method such as spunbond (SB) or spunbond-meltblown-spunbond (SMS) can be used. The basis weight of the nonwoven fabric constituting the base sheet 91 (in the case of a plurality of sheets, the total basis weight) is 30 to 120 g/m ² , and preferably 40 to 90 g/m ² .

(2) Structure of the crotch expansion joint

Next, the shape of the crotch stretch unit 200 will be described.

The crotch stretchable portion 200 is configured to maintain a flat shape in a portion of the crotch region 25 as compared with the other portion of the absorbent body 40 when the disposable disposable diaper 10 is attached to the wearer.

Here, the crotch stretchable portion 200 can be expanded and contracted in the longitudinal direction L of the product, and can be expanded and contracted in the product width direction W, and can also be expanded and contracted in both the product longitudinal direction L and the product width direction W.

For example, the crotch expansion-contraction portion 200 is separately provided separately from the leg expansion-contraction portion 75, and is configured to overlap the absorbent core member 40a (in the present embodiment, the core-wrapped layer 40b enclosing the absorbent core member 40a) The position between the back sheets 60a shrinks 60% or more of the length (natural state) of the absorbent core material 40a at the position in the product width direction W.

As described above, the portion in which the absorbent core member 40a is disposed is contracted by the crotch expansion-contraction portion 200, so that the absorbent core member 40a contracts, and the flat shape is easily maintained compared to the portion where the absorbent core member 40a is not contracted.

Further, the absorbent core member 40a located in the waist region 20 and the rear waist region 30 before the crotch expansion-contraction portion 200 is closer to the outer side in the longitudinal direction L of the product does not contract by the crotch expansion-contraction portion 200.

Therefore, the crotch elastic portion 200 of the disposable diaper region 10 of the disposable disposable diaper 10 is maintained in a flat shape by the buckle 90 in a state of being held by the waist and waist of the wearer without excessively adhering. As a result of the body, the crotch stretch unit 200 can be appropriately disposed along the body.

Further, in the case where the crotch expansion-contraction portion 200 can be expanded and contracted along the longitudinal direction L of the product, the front waistline region 20 and the rear waistline region 30 are easily erected by the contraction of the crotch expansion-contraction portion 200, and can be worn when worn. The lower part of the user's crotch forms a flat underarm area along the body.

As a result, since the front waistline region 20 and the rear waistline region 30 stand up from the crotch expansion-contraction portion 200, the fit of the disposable disposable diaper 10 to the wearer can be improved.

That is, by the contraction of the crotch stretchable portion 200, the disposable disposable diaper 10 can be stably installed, and the underarm region 25 of the disposable disposable diaper 10 can be placed in the crotch portion of the wearer.

Further, as described above, since the crotch stretchable portion 200 is configured to be expandable and contractible, one portion of the crotch region 25 of the disposable disposable diaper 10 is shrunk and the ready-to-wear side of the disposable disposable diaper 10 is used. The surface of the skin contact surface side is formed with irregular wrinkles. As a result, it is possible to visually recognize the wearing aid and visually feel the tummy portion in the disposable diaper 10 after the embodiment.

Further, the crotch stretch unit 200 may be formed of a stretchable sheet. By forming the crotch stretchable portion 200 with the stretchable sheet, the absorbent core member 40a in the region in which the stretchable sheet is disposed is contracted as it is. It is easier to maintain a flat shape. Further, the stretchable sheet may be configured, for example, in the same stretchable sheet as the leg stretch portion 75.

For example, as the stretchable sheet, a stretchable film in which a thermoplastic elastomer such as urethane or styrene is melted into a film shape, a stretchable nonwoven fabric composed of stretchable fibers, or a stretchable stretch can be used. A composite film such as a non-stretchable sheet which is partially cut or fragile is adhered to a film or a stretchable nonwoven fabric.

Moreover, in place of the stretchable sheet, the elastically stretchable elastic members made of a polyurethane or a natural rubber or the like are arranged in parallel to each other to form the crotch stretchable portion 200.

In this case, the rigidity of the absorbent core material 40a and the rigidity of the other members of the disposable disposable diaper 10 can be appropriately selected, and the thickness of the elastic member to be used, the pitch of the arrangement, and the like can be appropriately selected, but When the main body of the disposable diaper 10 is in a natural state (non-stretched state), it is preferable that the entire edge portion of the absorbent core member 40a in the product width direction W is contracted.

Moreover, in order to shrink the absorbent core material 40a in the same manner by the crotch stretchable portion 200, the interval between the elastic members is set to 7 mm or less, and more preferably 5 mm or less. Moreover, in order to shrink the absorptive core material 40a similarly, it is desirable to make the difference of the space|interval of the adjacent elastic member into 2 mm or less.

Specifically, the expansion ratio of the crotch stretch unit 200 is preferably 1.2 times or more and 1.8 times or less. For example, in the present embodiment, the expansion ratio of the crotch expansion-contraction portion 200 is set to 1.4 times.

The expansion ratio means the degree of expansion and contraction of the crotch expansion-contraction portion 200 in the contraction direction (in the longitudinal direction L of the product in the present embodiment), and is defined as follows.

The expansion ratio = (the length of the contraction direction of the crotch expansion-contraction portion 200 in the maximum extension state) / (the length of the contraction direction of the crotch expansion-contraction portion 200 in the natural state)

In the present specification, the expansion ratio is measured, for example, in the following manner.

First, in the case where the disposable disposable diaper 10 is packaged in a package or the like, the disposable disposable diaper 10 is taken out from the sealed package, in this state at 20 ° C ± 2 ° C, relative humidity 60% ± 5%. The environment of the RH was allowed to stand for 60 minutes, and the length of the crotch stretch unit 200 was measured along the contraction direction. This length is taken as [the length of the crotch stretch unit 200 in the natural state].

Secondly, the length of the contraction direction of the desired region in the state (that is, the natural state) and the length of the contraction direction of the desired region when the state based on the wrinkles of the elastic member cannot be visually recognized are measured. This length is taken as [the length of the crotch stretch unit 200 in the extended state].

Using these measurement results, the elongation was measured by the above formula.

By setting the expansion ratio of the crotch stretchable portion 200 to 1.2 times or more and 1.8 times or less, it is possible to satisfactorily follow the stretch of the wearer's skin.

For example, when the wearer makes the frontal contraction of the body, this flexion In the posture of the wearer's buttocks, there is a portion extending about 30% of the stretched body.

In other words, when the expansion ratio of the crotch expansion-contraction portion 200 is 1.2 or less, the shrinkage of the crotch elastic-contraction portion 200 in the natural state is insufficient, and it is disposable after the crotch expansion-contraction portion 200 is not provided. The shrinkage of the absorbent body arrangement region of the crotch region 25 of the disposable diaper 10 is small, and the crotch region 25 of the disposable disposable diaper 10 is not in the lower part of the wearer's crotch, and the flat shape is not obtained along the body. Sufficiently, the disposable disposable diaper 10 is easily deflected from the wearer's body.

In addition, when the expansion ratio of the crotch expansion-contraction portion 200 is made larger than 1.8 times, since the contraction size of the crotch expansion-contraction portion 200 in the contraction direction becomes excessively large, the region in which the crotch expansion-contraction portion 200 exists tends to become more along the body. In a more intimate state, the disposable disposable diaper 10 becomes easily deflected toward the underside of the wearer.

Further, the amount of contraction of the crotch stretchable portion 200 in the longitudinal direction L of the product may be 2 to 8% of the length of the product longitudinal direction L of the discarded disposable diaper 10 after use.

Further, the amount of shrinkage is such that the length of the wrinkle is extremely small, and the surface of the sample becomes a near-smooth state "b (mm)" and the length of the natural state of the sample along the contraction direction "a (mm) The difference can be calculated by (ba).

The inventors have confirmed that when the amount of shrinkage in the product longitudinal direction L of the crotch stretchable portion 200 is 2 to 8% of the length of the product longitudinal direction L of the discarded disposable diaper 10, it is discarded after use. Diaper 10 During the installation of the wearer, the crotch expansion and contraction portion 200 can be easily and desirably along the wearer's body.

Here, when the contraction amount of the crotch stretchable portion 200 in the longitudinal direction L of the product is made larger than 8%, the crotch stretchable portion 200 is excessively shrunk, resulting in the length of the product longitudinal direction L of the disposable disposable diaper 10 after use. Insufficient, it becomes difficult to attach the disposable disposable diaper 10 to the wearer's body, or to use the disposable disposable diaper 10 and the wearer's body to become excessively close in the underarm region 25. Offset.

In addition, when the contraction amount of the crotch stretchable portion 200 in the product longitudinal direction L is 2% or less, the effect of the disposable diaper 10 on the wearer's body stretchable portion 200 itself close to the wearer's body is less likely to occur. .

Further, the center O2 of the crotch expansion-contraction portion 200 in the longitudinal direction L of the product is disposed closer to the front waistline region 20 than the center O1 of the disposable diaper 10 after being used in the longitudinal direction L of the product. Further, the crotch stretch unit 200 is disposed so as to straddle the center O1 of the disposable diaper 10 after the product length direction L is used.

Further, the crotch stretch unit 200 is formed at a position O1 of the disposable diaper 10 after the product length direction L is included.

Moreover, the length (natural state) of the product longitudinal direction L of the rear waistline region 30 is configured to be longer than the length (natural state) of the product longitudinal direction L of the front waistline region 20.

Specifically, the length (natural state) of the product longitudinal direction L of the back waistline region 30 and the product length direction L of the front waistline region 20 The ratio of the length (natural state) is preferably 1.1 or more and 1.6 or less, and more preferably 1.2 or more and 1.5 or less.

When the ratio exceeds 1.6, the balance between the abdomen side and the back side of the disposable disposable diaper 10 collapses, and the front waistline region 20 is excessively adhered or rear waistline in the case where the crotch expansion-contraction portion 200 is along the crotch region 25. Area 30 is over-covered.

Specifically, the wearer's body is generally in a state in which the buttocks are more prominent than the lower abdomen. Therefore, when the crotch expansion-contraction portion 200 is fitted to the wearer's crotch portion, the ratio is made to be the aforementioned range. For the shape of the complex wearer's body, the disposable disposable diaper 10 can be more suitably shaped.

That is, it is possible to prevent the disposable disposable diaper 10 from partially protruding due to the occurrence of the insufficient size portion, or the formation of an unnecessary gap between the disposable disposable diaper 10 and the body due to the occurrence of the excessively large portion. The situation arises.

In addition, it is preferable to use a posture in which the body is rounded toward the abdomen, and it is preferable to use a posture in which the body is rounded toward the abdomen. By setting the above ratio within the above range, it is possible to form a state suitable for the body of the infant who is easy to make such a posture.

As an example, the product length of the disposable disposable diaper 10 is 400 mm (the length of the natural state in the product longitudinal direction L), and the front waistline region 20 is set to 130 mm (the length of the natural state in the product longitudinal direction L), and the crotch expansion-contraction portion is used. Set to 80mm (the length of the product from the L) In the state of the state, the rear waistline region 30 is set to 100 mm (the length of the natural state in the longitudinal direction L of the product).

In this case, the ratio of the length of the front waistline region 20 to the back waistline region 30 (natural state) is about 1.46. By making such a ratio, not only the crotch stretchable portion 200 but also the disposable disposable diaper 10 can be further along the wearer's body in the longitudinal direction L of the product.

That is, according to this configuration, it is possible to more reliably achieve the position in the longitudinal direction of the article by the crotch expansion-contraction portion 200, so that the disposable disposable diaper 10 correctly conforms to the wearer's body and is disposable. The purpose of the present invention is to shape the diaper 10.

The state in which the crotch expansion-contraction portion 200 is contracted is different from the state in which the absorbent body arrangement region on the front waistline region 20 side and the rear waistline region 30 side is closer to the crotch expansion-contraction portion 200, and therefore is different. When the disposable disposable diaper 10 is worn by the wearer, it is easy to attach the crotch expansion-contraction part 200 to the wearer's crotch portion.

Further, according to this arrangement, in a state where the portion where the absorbent core member 40a of the crotch stretchable portion 200 is shrunk, since the rigidity or thickness of the portion is different from the rigidity or thickness of the portion of the other absorbent core member 40a, It is easy for the wearer to recognize the portion of the crotch region 25 of the disposable disposable diaper 10 that matches the lower portion of the wearer's crotch.

Further, after the disposable disposable diaper 10 is installed, the crotch stretchable portion 200 is maintained in a flat shape on the lower portion of the wearer's crotch, and the disposable disposable diaper 10 itself has a three-dimensional shape. After use, the underarm region 25 of the disposable diaper 10 is placed along the lower jaw of the wearer, thus, The underarm region 25 of the disposable disposable diaper 10 can be attached to the lower portion of the wearer's crotch.

As shown in FIG. 1, a notch portion 110 and a notch portion 120 are formed in the crotch region 25 of the absorber 40. The notch portion 110 and the notch portion 120 are regions in which the absorbent core member 40a constituting the absorber 40 is not present.

In the present embodiment, the notch portion 110 and the notch portion 120 correspond to a low rigidity portion in which the basis weight of the absorbent core member 40a is lower than that of the other portion of the absorbent core member 40a.

Further, instead of forming the notch portion 110 and the notch portion 120, the basis weight of the absorbent core member 40a may be made lower than the other portions of the absorbent core member 40a.

As shown in FIG. 1, the notch part 110 and the notch part 120 are formed along the edge part of the longitudinal direction L of the crotch expansion-contraction part 200.

Furthermore, even if the notch portion 110 and the notch portion 120 are formed, the absorbent core material 40a located in the front waistline region 20 and the back waistline region 30 and the absorbent core material 40a located in the crotch region 25 are not completely Separation is particularly preferred in the width direction W of the article.

The notch portion 110 and the notch portion 120 are configured to have a long length (natural state) in the longitudinal direction L of the product in the product width direction W.

With such a shape, the outer side in the product width direction W of the absorbent core member 40a is more easily contracted, and therefore, it is easier to form a flat [bottom] in the disposable disposable diaper 10 after use.

Moreover, since it is located closer to the front waist region than the notch portion 110 The absorbent core member 40a on the side of the region 20 and the absorbent core member 40a located closer to the side of the back waistline region 30 than the notched portion 120 are easily bent to stand up from the flat [bottom] and along the wearer's body (abdomen) The arc curve of the buttocks can be used to make the shape of the disposable disposable diaper 10 closer to the wearer's body shape.

As shown in FIG. 1, the edge portion of the front waistline region 20 side of the notch portion 110 and the edge portion of the notch portion 120 closer to the rear waistline region 30 side may have an arc shape.

Specifically, the edge portion of the front waistline region 20 side of the notch portion 110 has a shape in which the center of the arc is located closer to the back waistline region 30 than the edge portion, and the edge portion of the back waist region 30 side of the notch portion 120 is The center of the arc is located closer to the side of the front waistline region 20 than the edge.

With such a shape, the deformation of the disposable disposable diaper 1 along the circular curve of the wearer's body becomes easier and more conspicuous.

The edge portion on the waist region 20 side of the notch portion 110 in the product longitudinal direction L constitutes the first inversion portion 115, and the edge portion on the waist region side after the product longitudinal direction L of the notch portion 120 constitutes the second inflection point 125.

Further, the first inflection point 115 and the second inflection point 125 are configured to extend in the product width direction W, and become a bending base point of the disposable disposable diaper 10.

As shown in Fig. 1, in the disposable disposable diaper 10 of the present embodiment, in a natural state, the crotch stretchable portion 200 can be bilaterally symmetrical across the center line O of the product width direction W, and can also be in the product width direction W. The center line O is the boundary and the left and right widths of the crotch expansion and contraction portion 200 The difference is less than 10%.

According to the disposable disposable diaper 10 of the present embodiment, the crotch stretchable portion 200 can be placed in the lower portion of the wearer's crotch across the center of the wearer's body.

Moreover, in the disposable diaper 10 after use in the present embodiment, the crotch stretchable portion 200 is disposed apart from the waistline holding portion and the elastic member 71.

Further, in the disposable diaper 10 after use in the present embodiment, a non-stretchable region is provided on the side of the waist region 20 and the side of the rear waist region 30 before the longitudinal direction L of the crotch expansion-contraction portion 200.

Further, in the disposable diaper 10 after use in the present embodiment, as shown in Fig. 1, the length of the absorbent core member 40a in the product width direction W is configured to be shortened from the front waistline region 20 toward the crotch region 25, and The rear waistline region 30 becomes shorter toward the underarm region 25.

Here, the crotch stretchable portion 200 is provided in the intermediate portion 43 and the narrow portion 42 having a length shorter than a predetermined length in the product width direction W of the absorbent core member 40a.

In the intermediate portion 43 and the narrow portion 42, since the absorbent body 40 has a small absorption capacity, the absorbent liquid of the wearer cannot be absorbed by the absorbent body 40 in the region, and it is easy to become the waist region before the longitudinal direction L of the product in the region. The absorbent body 40 on the side of the 20 side and the rear waistline region 30 is absorbed.

As a result, the discoloration of the indicator 65 is easily transmitted from the region toward the front waistline region 20 side and the rear waistline region 30 side.

Generally, in the area where the crotch expansion and contraction portion 200 is provided, The wrinkles caused by the constricted portion 200 are generated, so that the wearing assistant differs in the discoloration of the indicator 65 in the region from the non-stretching region.

When considering the above points, according to the above configuration, the wear assistant can use the discoloration of the indicator 65 in the area as the disposable disposable diaper 10, and in the longitudinal direction L of the product in the area. The discoloration of the indicator 65 of the non-stretchable region on the side of the front waistline region 20 and the side of the rear waistline region 30 serves as a reference for the disposable disposable diaper 10 after replacement.

As a result, it is possible to suppress the disposable disposable diaper 10 from being over-replaced, and to notify the replacement time point of the disposable disposable diaper 10 after appropriate use.

The width of the crotch stretchable portion 200 in the product width direction W is 1/2 or more of the width of the absorbent core member 40a in the product width direction W in the region where the crotch stretchable portion of the absorbent core member 40a exists.

Therefore, the crotch elastic expansion portion 200 shrinks the fixed width of the portion where the absorbent core member 40a is disposed, whereby the absorbent core member 40a contracts, and the absorbent core member 40a is lifted up to be close to the wearer's body.

By achieving lifting of the absorbent core member 40a in the crotch region, it is possible to reduce the occurrence of a gap between the disposable disposable diaper 10 and the wearer. When the width of the crotch stretchable portion 200 in the product width direction W is 60% or more of the width of the absorbent body 40 (absorbent core member 40a) in the product width direction W, it is more preferably 80% or more, and it can be further reduced. A gap between the disposable disposable diaper 10 and the wearer is created.

Further, when the width of the crotch stretchable portion 200 is too narrow compared to the width of the absorbent core member 40a, it is difficult to obtain lifting of the aforementioned absorbent core member. The effect of 40a. In addition, when the width of the crotch stretchable portion 200 is too wide, the portion where the absorbent core member 40a is not disposed is more contracted than the portion where the absorbent core member 40a is disposed, compared to the width of the absorbent core member 40a. A disposable disposable diaper 10 is installed. Therefore, the members constituting the portion where the absorbent core member 40a is not disposed are overlapped with each other, and the crotch stretchable portion 200 is hardened to impair the wearing feeling of the disposable disposable diaper 10.

For example, when the size (elongation state) of the portion where the width of the region where the crotch elastic portion of the absorbent core member 40 is the smallest is 120 mm, the width of the crotch elastic portion 200 is preferably 60 to 110 mm. More preferably, the width of the crotch stretch unit 200 is 90 to 110 mm.

The portion where the width of the absorbent core member 40a is the narrowest in the product width direction W is set to the front side of the center line of the product in the longitudinal direction of 10 to 60 mm. It is preferable that the portion where the width of the absorptive core material 40a is the narrowest in the product width direction W is provided on the front side of the center line of the longitudinal direction of the product of 20 to 40 mm. The crotch stretchable portion 200 is preferably formed across a portion where the width of the absorbent core member 40a is the narrowest in the product width direction W.

The position where the right and left thighs of the wearer are closest to each other is closer to the front side than the center of the wearer's body in the front-rear direction. Therefore, by the contraction force of the crotch stretchable portion 200, the position where the width of the absorbent core member 40a is the narrowest in the product width direction W can be actively placed at the position where the right and left thigh portions of the wearer are closest to each other. In other words, even if the wearer of the mother or the like does not perform the alignment of the absorbent core member 40a, the alignment of the absorbent core member 40a can be naturally performed.

Further, the indicator 65 is configured to be from the absorbent core 40a and The region where the crotch expansion-contraction portion 200 overlaps extends beyond the crotch expansion-contraction portion 200 toward the product longitudinal direction L.

According to this configuration, the absorbent core member 40a and the indicator 65 are lifted up along the wearer's body by the crotch expansion-contraction portion 200, and can be stably installed after being worn along the wearer's body. Disposable disposable diaper 10.

(3) Structure of the back sheet

Next, the structure of the back sheet will be described. The back sheet is a liquid-impermeable sheet, and as shown in FIGS. 1 and 4, it has a rectangular shape in a plan view. The back sheet 60a extends outward in the product width direction from the outer end portion in the width direction of the absorbent core member 40a, and extends outward from the outer end portion of the absorbent core member in the longitudinal direction of the product. .

Both ends of the back sheet 60a in the product width direction are closer to the outer side in the product width direction than the both end portions in the product width direction of the absorbent core member 40a, and both ends of the product width direction of the discarded disposable diaper are used (outerwear) The both ends of the sheet and the side panel in the width direction of the product are closer to the inner side in the width direction of the product. Both ends of the back sheet 60a in the longitudinal direction of the product are closer to the outer side in the longitudinal direction of the product than the both end portions of the absorbent core member 40a in the longitudinal direction of the product, and the ends of the product in the longitudinal direction of the discarded disposable diaper (outerwear) Both ends of the sheet and the side panels in the longitudinal direction of the product are closer to the inner side in the longitudinal direction of the product.

The back sheet is given a plurality of patterns. The pattern is imparted by printing, and the printing method is not limited. For example, aniline Printing, gravure printing, lithography, inkjet printing, and the like.

The pattern includes at least the marking patterns M11, M12; the central pattern M21; the position pattern M31; and the pattern M41. The designating patterns M11 and M12 are patterns for indicating the position of the absorbent core material. In the present embodiment, the first indication pattern M11 composed of a pattern of bears and the second indication pattern M12 composed of a pattern of enamel are provided.

The marking pattern is disposed at a position that does not overlap the outer end portion in the width direction of the product of the absorbent core material. At least a part of the marking pattern is disposed in an overlapping region where the absorbent core material and the back surface sheet overlap, and is closer to the outer side in the width direction of the product than the imaginary line FL1 extending through the product width direction outer end portion of the narrow portion and extending toward the product length direction. within the area. Furthermore, the overlapping region is identical to the region in which the absorber is disposed at a planar viewing angle.

Since the back sheet is provided with a mark pattern indicating the position of the absorbent core material, the installer can grasp the position, shape, and the like of the absorbent core material based on the mark pattern. In addition, since the designating patterns M11 and M12 are patterns indicating the position of the absorbent core material, they are not provided in the center in the width direction of the absorbent core material but in the width direction from the center of the absorbent core material toward the width. The position offset outside the direction. More specifically, the marking pattern is disposed in the vicinity of the outer end portion in the width direction of the absorbent core member (including a position separated by a few mm from the outer end portion in the width direction, a position that coincides with the outer end portion in the width direction, and the like). The marking pattern is disposed at a position close to the outer end portion in the width direction of the absorbent core member, and is disposed at a position that does not overlap the outer end portion in the width direction of the absorbent core member.

Also, when the position of the disposable diaper is shifted, there will be absorption. The width direction end portion of the core material is bent. Since the marking pattern is provided at a position that does not overlap the outer end portion in the width direction of the product of the absorbent core member, for example, when the marking pattern is bent, it indicates that the marking is not correctly installed. Therefore, the installer can grasp whether the position of the absorbent core material is correct by marking the pattern.

Further, in the overlapping region, the region closer to the outer side in the product width direction than the imaginary line FL1 is a portion in which the absorbent core member extends outward from the crotch portion in the width direction, and is a portion disposed along the circumference of the wearer. By providing the marking pattern in this portion, the marking pattern can be clearly displayed on the inner side of the foot circumference, whereby the absorbent core material can be grasped and arranged along the foot circumference.

Since the installer can grasp whether the installation position is correct according to the design pattern, it is easy to grasp the outline of the absorbent core. Since the alignment of the absorptive core material can be performed according to the pattern, even if it is an unaccustomed installer, the burden of the alignment can be reduced. When the mounting is performed, the absorbent core member is placed at the correct position, so that the aforementioned crotch expansion-contraction portion 200 is also placed at the correct position, and the absorbent core member can be disposed along the wearer's body. The back sheet of the present embodiment is designed to match the outer shape of the absorbent core material. Therefore, the installer can install the disposable disposable diaper by instructing the marking pattern of the back sheet, and the absorbent core can be placed at the correct position. The absorbent core material has a shape that is external to the wearer's body, and the shape of the back sheet can accurately mount the absorbent core material along the outer shape of the wearer's body.

Further, in a region closer to the outer side in the width direction of the product than the imaginary line FL1, a part of the marking pattern may be disposed, or The entire central pattern is disposed in a region in which the imaginary line FL1 is closer to the outer side in the width direction of the product.

The pattern M41 is a pattern different from the marking pattern. In this embodiment, it is a pattern of flowers. The pattern is provided in plural, and is disposed intermittently on the entire back sheet. The plurality of patterns are respectively provided in non-overlapping regions and overlapping regions where the absorptive core material and the back sheet do not overlap. By designing a pattern on the entire back sheet, the design can be improved. Further, the pattern patterns of the present embodiment are patterns having substantially the same size, but may include patterns having different sizes, and may include patterns having different shapes.

At least one of the plurality of patterns is disposed to overlap the leg expansion and contraction portion. At least one of the plurality of patterns is disposed to overlap the waist stretch unit. The portion where the leg expansion portion is provided and the portion where the waist expansion portion is provided are portions that are deformed by the action of the wearer. By the action of the wearer's foot, a state in which a pattern or the like is visible and a state in which it is invisible are obtained. By imparting a pattern to the portion of the action that is easy to present the wearer, the wearer (e.g., the mother) can enjoy the shape of the diaper by the action of the wearer. Further, since only the pattern or the like changes in a state in which the marker pattern is seen, the ride can be changed relatively.

The logo patterns M11 and M12 and the pattern M41 are disposed at positions that do not overlap the indicator 65. Therefore, the visibility of the indicator can be ensured.

The central pattern M21 is not associated with the logo pattern and the pattern The same pattern. The central pattern M21 is disposed in a region between the pair of target portions of the back sheet 60a, and is disposed not in the crotch region but in the front waist region. The central pattern is a pattern indicating the area between the pair of buckles and the center of the product in the width direction of the disposable disposable diaper. The position pattern M31 is a pattern different from the mark pattern, the pattern, and the center pattern. The position pattern M31 is provided in a region where a pair of target portions of the back sheet overlap. The position pattern is a pattern indicating the position of the buckle. In the present embodiment, the central pattern is a pattern of a bear face, and the position pattern is a digital pattern.

In the exterior sheet 60, a concavo-convex shape (wrinkle) is formed. More specifically, the outer sheet 60 is formed with a concave portion and a convex portion. The concave portion is a portion that is pressed in the thickness direction by embossing, and the thickness of the outer sheet is thinner than the convex portion. The convex portion is a portion thinner than the concave portion, and is not embossed by the pressing portion or a portion having a lower pressing degree than the concave portion. Further, the uneven portion may be configured to have at least a different volume, and may be configured such that the density of the concave portion and the convex portion are different, and the concave portion and the convex portion may have the same density but different basis weights.

The uneven portion of the exterior sheet of the outer sheet in the region where the central pattern overlaps has the same shape as the uneven portion of the outer sheet in the region where the pattern overlaps. Moreover, the uneven portion of the exterior sheet of the outer sheet in the region where the central pattern overlaps has a different configuration from the uneven portion of the outer sheet in the region where the position pattern overlaps.

By providing the uneven portion of the exterior sheet in this manner, the central pattern and the pattern can be displayed in a single sense, and the design can be improved. Further, the position pattern can be displayed in a different manner from the central pattern, and can be made conspicuous when the alignment is performed.

In addition, the arrangement pattern of the uneven portions of the structure in which the uneven portions are different may be different, and includes not only structures having different shapes of the uneven portions (for example, stripe shapes and dot shapes) but also structures having similar shapes formed by the uneven portions (fine stripes) With the concept of thick stripes).

Further, in the present embodiment, the configuration in which the superimposed arrangement includes not only the structure directly overlapping the target members but also the structure in which the other members overlap. In other words, the positional relationship is overlapped in the plane view angles shown in FIGS. 1 and 4.

The central pattern is disposed across the center of the width direction of the absorbent core material. The center of the product width direction of the center pattern and the center of the product width direction of the mark pattern are arranged offset in the product width direction. The installer can easily grasp the center of the width direction of the absorbent core material by the central pattern.

Further, it is desirable that the central pattern be a position corresponding to the waist of the wearer. Since the center of the disposable disposable diaper is placed on the wearer's navel in a state in which the disposable disposable diaper is attached, the center pattern is disposed at the center of the disposable disposable diaper. Moreover, the indication pattern shows the positional relationship with respect to the foot hole of an absorber, and it is arrange|positioned by the center side to the outer side of the width direction. By installing the line of sight from the central pattern toward the marking pattern, the installation assistant can confirm the position from the navel of the wearer toward the groin of the foot hole, and can more smoothly confirm the installation position from the navel to the foot hole.

(4) Other embodiments

As described above, the content of the present invention has been disclosed by the embodiments of the present invention, but the description and drawings which are part of this disclosure are not intended to limit this invention. The present invention includes various alternative embodiments, examples, and operational techniques that are apparent to those skilled in the art from this disclosure.

Further, in the above-described embodiment, the disposable disposable diaper has been described as an example. However, the present invention is also applicable to a disposable diaper for a shorts type.

Further, the pattern of the exterior sheet may have at least a label pattern, and may have no other pattern. Further, the pattern is not limited to the shape of the above embodiment. Further, the exterior sheet may not have irregularities. It is also possible not to set an indicator.

As such, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is determined by the specific matters of the invention from the above description only by the scope of the invention.

Further, all the contents of the Japanese Patent Application No. 2012-259169 (filed on Nov. 27, 2012) are hereby incorporated by reference.

[Industry use possibility]

It is possible to provide a disposable disposable diaper which can easily grasp the outline of the absorbent core material even if it is unaccustomed to the installation, and can reduce the psychological burden of the alignment when the installation is performed.

40a‧‧‧Absorbing core material

60a‧‧‧back sheet

60‧‧‧Outer sheets

65‧‧‧ indicator

90‧‧‧ buckle

95‧‧‧ Target Department

M11‧‧‧ logo pattern

M12‧‧‧ logo pattern

M21‧‧‧Central pattern

M31‧‧‧ position pattern

M41‧‧‧ pattern

Claims (7)

A disposable disposable diaper having a front waist region, a rear waist region, and a crotch region between the front waist region and the rear waist region, and a product from the front waist region toward the rear waist region The longitudinal direction and the product width direction orthogonal to the longitudinal direction of the product further include an absorbent core material that extends across the crotch region and extends toward at least one of the front waistline region and the rear waistline region; a waistband region extending outwardly from the outer side in the width direction of the product; a liquid-impermeable back sheet disposed at a position closer to the non-skin abutting surface side than the absorbent core; and an outer sheet And disposed at a position closer to the non-skin abutting surface side than the back sheet, and can be fixedly mounted on the buckle, wherein the absorbent core has: the length of the product located in the absorbent core a wide portion at both ends of the direction; and a central portion of the absorbent core in the longitudinal direction of the product and in the width direction of the absorbent core The back surface sheet is extended to the outer side in the product width direction from the outer end portion in the product width direction of the absorbent core member, and is smaller than the outer side in the longitudinal direction of the product of the absorbent core member. The portion further extends outward in the longitudinal direction of the product, and the back sheet is provided with a marking pattern indicating the position of the absorbent core member. The marking pattern is disposed at a position that does not overlap the outer end portion of the absorbent core in the width direction of the product, and at least a portion of the marking pattern is disposed in an overlapping region of the absorbent core and the back sheet. The imaginary line extending in the product width direction outer end portion of the narrow portion in the width direction of the product is closer to the outer side in the product width direction. A disposable diaper for use in the first aspect of the invention, further comprising: a foot opening formed in the crotch region; and disposed closer to the inner side in the width direction of the product than the foot opening and facing the article a plurality of pattern patterns different from the indication pattern are provided on the back sheet in the longitudinal direction, and the plurality of pattern patterns are provided so that the absorptive core material and the back sheet do not overlap each other. In the region and the overlapping region, at least one of the plurality of patterns is disposed so as to overlap the leg stretch portion. A disposable diaper for use in the second aspect of the invention, wherein the waistband expansion and contraction portion is stretchable in the width direction of the product in one of the width directions of the product, and the plurality of patterns are in the plurality of patterns At least one of the patterns is disposed to overlap the waist expansion-contraction portion. A disposable diaper for use in the second or third aspect of the patent application, wherein the disposable disposable diaper further includes an indicator configured to extend toward the length of the article, and When it comes into contact with water The visual pattern changes, and the marking pattern and the pattern are disposed at positions that do not overlap with the indicator. A disposable disposable diaper according to any one of claims 2 to 4, wherein the front waist region is provided with one of the target portions fixedly attached to the buckle, and the pair of target portions are attached to The product is disposed in the width direction of the product, and a central pattern different from the indication pattern and the pattern is provided in a region between the pair of target portions of the back sheet, and overlaps between the pair of target portions of the back sheet. a region pattern is provided with a position pattern indicating a position of the buckle, and the outer sheet is formed with a concavo-convex portion, and the outer surface of the outer sheet in which the central pattern overlaps is overlapped with the pattern The uneven portion of the sheet to be attached has the same shape, and the uneven portion of the exterior sheet of the region in which the uneven portion of the exterior sheet overlaps the position pattern in the region where the center pattern overlaps has a different shape. The disposable diaper of the fifth aspect of the invention, wherein the central pattern is disposed across a center of the product width direction of the absorbent core, and the center of the product width direction of the central pattern and the marking pattern The center of the product in the width direction is arranged to be offset in the width direction of the above-mentioned product. A disposable disposable diaper according to any one of claims 1 to 6, wherein the indicator pattern is not disposed in the center in the width direction of the absorbent core member, but is disposed in the absorbent core member. The center of the width direction is shifted toward the outer side in the width direction.