WO2013051370A1

WO2013051370A1 - Disposable diaper

Info

Publication number: WO2013051370A1
Application number: PCT/JP2012/073054
Authority: WO
Inventors: 佐藤　信也
Original assignee: 花王株式会社
Priority date: 2011-10-07
Filing date: 2012-09-10
Publication date: 2013-04-11
Also published as: JP5912390B2; CN103764087B; CN103764087A; JP2013081599A

Abstract

A disposable diaper (1) is provided with a front surface sheet (10), a rear surface sheet (20), and an absorption body (30). The diaper (1) has a crotch section (C) and has a belly-side section (A) and a back-side section (B) which extend from the front and rear of the crotch section (C). The diaper (1) comprises: fastening tapes (40) for fastening purpose, the fastening tapes (40) being provided in the left and right side regions of the back-side section (B); and a target tape (50) to which the fastening tapes (40) are fastened, the target tape (50) being provided on the outer surface of the belly-side section (A). The absorption body (30) has a recess (31) in the region thereof which overlaps the target tape (50), and the recess (31) is formed along the width direction of the absorption body (30). The presence of the recess (31) can be recognized by tactile sensation from the rear surface-side outer surface of the diaper. The recess (31) as a whole is formed so that the recess (31) is line symmetrical about the longitudinal centerline (L_v) of the target tape (50) and non-symmetrical about the horizontal centerline (L_H) of the target tape (50).

Description

Disposable diapers

The present invention relates to a disposable diaper of a type that is attached by fastening a fastening tape to a target tape.

For disposable diapers of the type that are attached by fastening the left and right fastening tapes provided on the back side of the diaper to the target tape provided on the outer surface of the abdomen, that is, so-called tape-fastening type diapers If the left and right balance is lost when the tape is fastened, liquid leakage tends to occur easily. Therefore, for the purpose of balancing the fastening positions of the left and right fastening tapes, for example, various techniques have been proposed for visually displaying the fastening positions by providing a display as a guide for the fastening positions on the target tape. For example, Patent Document 1 describes that a target tape is bonded to the outer surface of a diaper by thermal fusion, and a bonding pattern by thermal fusion is used as a mark for a fastening position of the fastening tape.

However, simply providing a means for visually recognizing the stop position causes inconveniences when the diaper is changed in a dark place such as at night or when a person with visual impairment changes the diaper.

By the way, apart from the above-described technique, Patent Documents 2 to 4 disclose that the surface of the diaper absorbent body facing outward is provided with unevenness by embossing, or a thin wall portion is formed on the absorbent body. It is described to provide. However, this unevenness is provided for the purpose of improving the fit and absorbability of the absorber, and also for the purpose of making it possible to visually recognize the presence or spread of excrement from the outside. It will not be.

JP 2007-307210 A Japanese Patent Laid-Open No. 10-146359 JP 2005-152241 A JP 2011-115245 A

The present invention comprises a top sheet positioned on the skin facing surface side of the wearer, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between both sheets, and the inseam of the wearer in the mounted state A crotch portion located on the crotch portion, and an abdominal side portion and a dorsal side portion extending from the front and back of the crotch portion. A disposable diaper having a target tape to which the fastening tape is fixed is provided. The absorber has one or more recesses formed continuously or discontinuously over the width direction of the absorber in a region overlapping with the target tape. The presence of the recess can be perceived by touch from the outer surface of the back sheet side of the diaper. The concave portion as a whole is formed so as to be axisymmetric with respect to the longitudinal center line of the target tape and to be asymmetric with respect to the lateral center line of the target tape.

The present invention also provides a suitable method for producing the disposable diaper. In this manufacturing method, an absorbent body is manufactured by wrapping a stacked fiber body with a sheet. Next, pressing by embossing is performed from the skin facing surface side of the absorbent body, and the concave portion is formed on the surface of the absorbent body on the skin facing surface side, and the concave portion is also formed on the surface of the non-skin facing surface side.

Fig.1 (a) is the top view which looked at one Embodiment of the disposable diaper of this invention from the surface sheet side, FIG.1 (b) shows the diaper shown in FIG.1 (a), and a part of back sheet | seat. It is the top view which fractured | ruptured and was seen from the back surface sheet side. Fig.2 (a) and (b) are the schematic diagrams which show the principal part of another embodiment of the disposable diaper of this invention. Drawing 3 is a mimetic diagram showing the important section of another embodiment of the disposable diaper of the present invention. Fig.4 (a) thru | or (c) are the schematic diagrams which show the principal part of another embodiment of the disposable diaper of this invention. Drawing 5 is a mimetic diagram showing the important section of another embodiment of the disposable diaper of the present invention. Drawing 6 is a mimetic diagram showing the important section of another embodiment of the disposable diaper of the present invention. FIG. 7 is a schematic view showing a main part of another embodiment of the disposable diaper of the present invention. FIG. 8 is a schematic view showing a main part of another embodiment of the disposable diaper of the present invention. Fig.9 (a) and (b) are the schematic diagrams which show the principal part of another embodiment of the disposable diaper of this invention. FIG. 10 is a schematic view showing a main part of another embodiment of the disposable diaper of the present invention.

Detailed Description of the Invention

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The top view of one Embodiment of the disposable diaper of this invention is shown by Fig.1 (a) and (b). Fig.1 (a) is the state which looked at the diaper 1 from the surface sheet side, FIG.1 (b) is the state which partially fractured | ruptured the back surface sheet and looked at the diaper 1 from the back surface sheet side.

The diaper 1 shown in FIGS. 1 (a) and 1 (b) is of a so-called tape type. The diaper 1 has a vertically long shape having a longitudinal direction X and a width direction Y, and has a top sheet 10 positioned on the skin facing surface side of the wearer and a back sheet 20 positioned on the non-skin facing surface side. ing. A liquid-retaining absorbent 30 is disposed between the top sheet 10 and the back sheet 20. The top sheet 10 and the back sheet 20 extend outward from the periphery of the absorber 30.

As the top sheet 10, the back sheet 20, and the absorber 30, the same ones conventionally used for this type of diaper can be used. As the surface sheet 10, for example, a liquid-permeable sheet material such as a nonwoven fabric or a perforated film can be used. As the back sheet, a water-repellent sheet material such as a synthetic resin film or the like, or a spunbond-meltblown-spunbond nonwoven fabric (SMS nonwoven fabric) can be used. A synthetic resin film may be composed of a microporous film to impart water vapor permeability. Moreover, you may use the composite sheet which laminated | stacked breathable sheets, such as a nonwoven fabric, on the outer surface of a microporous film as a back surface sheet. As the absorbent body 30, a laminated body of a liquid-retaining fiber material or a laminated body of a mixture of the fiber material and a superabsorbent polymer can be used. The fiber stack may be entirely wrapped with various sheets such as a liquid permeable sheet such as tissue paper.

Side sheets 11 extending in the longitudinal direction X are disposed on the left and right side portions of the diaper 1 on the surface sheet side. The side sheet 11 can be comprised from the sheet material which has water repellency, such as a nonwoven fabric. The side sheet 11 is disposed on the top sheet 10 so as to cover a part of the top sheet 10. Out of the side edges of each side sheet 11, the outer side edge in the width direction Y is fixed to the back sheet 20. On the other hand, among the side edges of each side seat 11, the side edge on the inner side in the width direction Y is a free end. An elastic member 12 such as rubber thread is fixed to the free end in an extended state. As a result, the side sheet 11 stands and a leak-proof cuff is formed.

The diaper 1 has a crotch part C located in the crotch of the wearer, and a ventral part A and a back part B extending from the front and back of the crotch part C in the worn state. The crotch portion C is provided with a stretchable leg cuff 13 that extends laterally from the left and right side edges of the absorbent body 30 and extends in the longitudinal direction X. The leg cuff 13 is formed by fixing an elastic member 14 such as rubber thread between the side sheet 11 and the back sheet 20 in an extended state.

A side flap 15 extending laterally from the left and right side edges of the absorber 30 is provided on the back side B of the diaper 1. The side flap 15 is formed by joining the side sheet 11 and the back sheet 20. An elastic member (not shown) may be disposed in an extended state between the side sheet 11 and the back sheet 20 so that the side flap 15 can be expanded and contracted in the width direction Y. Alternatively, instead of forming the side flaps from the side sheet 11 and the back sheet 20, a stretchable side flap may be produced with a separate sheet and attached to the back side B of the diaper 1.

Fastening tape 40 is attached to the side flap 15 on the outer side edge in the width direction Y. The fastening tape 40 includes a base sheet 41 and a fastening portion 42 provided on a surface of the base sheet 41 facing the same side as the top sheet 10. As the fastening part 42, the thing similar to what was conventionally used for this kind of diaper can be used. For example, a hook member of a hook-and-loop fastener or an adhesive can be used.

The target tape 50 is attached to the outer surface of the diaper 1 at the ventral side A of the diaper 1. The target tape 50 has a horizontally long rectangular shape, and has a longitudinal direction that is the same as the longitudinal direction X of the diaper 1 and a lateral direction that is the same as the width direction Y of the diaper 1. The target tape 50 is selected from an appropriate material according to the material of the fastening portion 42 in the above-described fastening tape 40. When the fastening portion 42 is, for example, a hook member of a hook-and-loop fastener, a fiber sheet that can be engaged with the hook member, such as a knitted fabric or a nonwoven fabric, is used as the target tape 50. When the fastening portion 42 of the fastening tape 40 is made of an adhesive, a smooth film made of synthetic resin or the like can be used as the target tape 50.

The diaper of the present invention has one of the characteristics of the absorber. Specifically, the absorber has one or more recesses in a region overlapping the target tape when the diaper is viewed in plan. The presence of the recess can be perceived by touch from the outer surface of the back sheet side of the diaper. That is, when the region where the concave portion is formed is touched by hand from the outer surface of the diaper, the concave portion is formed so that it is perceived that the concave portion is formed there. The recess is generally formed on the surface of the absorbent body on the non-skin facing surface side, that is, the surface facing the back sheet. In order to enable such perception, for example, the formation depth of the recess may be set to about 2 to 10 mm. In order to form a recess having such a depth, for example, an embossing process is applied to an absorbent body formed by wrapping a stacked fiber body containing a liquid-retaining fiber material, and the absorbent body is partially consolidated. do it. Or what is necessary is just to form the part which should become a recessed part thinly, when liquid absorbent fiber material is piled and an absorber is manufactured.

From the viewpoint of more perceiving unevenness, it is advantageous to form a recess by embossing the absorber. When forming a recessed part by embossing, you may press from the surface of the non-skin opposing surface side in an absorber, and you may press from the surface of the skin opposing surface side. When pressing is performed from the surface on the skin-facing surface side of the absorbent body, a recess is formed not only on the pressed portion but also on the surface on the non-skin facing surface side corresponding to the pressed portion.

In particular, under the condition that the top sheet is disposed on one surface side of the absorber and the back sheet is disposed on the other surface side, embossing is performed from the top sheet side through the top sheet, It is preferable to form a recess on the surface facing the skin and also form a recess on the surface facing the non-skin facing surface, since it is easier to perceive that the recess is formed there. It is also possible to press the absorber by embossing from the back sheet side through the back sheet, but in that case, it is necessary to be careful not to cause defects such as pinholes in the back sheet is there.

When the absorber has only one recess, the recess is continuously formed so as to extend across the lateral direction of the target tape. When the absorber has a plurality of recesses, the plurality of recesses are formed discontinuously over the lateral direction of the target tape. That is, when a virtual line connecting a plurality of the concave portions is considered, the concave portions are arranged so that the virtual lines extend in the lateral direction of the target tape.

Regardless of whether the absorber has only one concave portion or a plurality of concave portions, the concave portion as a whole is formed to be line symmetrical with respect to the longitudinal center line of the target tape. ing. In addition to this, the concave portion as a whole is formed to be asymmetric with respect to the lateral center line of the target tape. The details are as follows. When the absorbent body has only one recess, the one recess is line-symmetric with respect to the longitudinal center line of the target tape and with respect to the lateral center line of the target tape. It is formed to be asymmetric. When the absorber has a plurality of recesses, when paying attention to the recess design consisting of the shape of each recess and the arrangement pattern composed of the entirety of the plurality of recesses, the recess design, It is axisymmetric with respect to the longitudinal center line of the target tape and is asymmetric with respect to the lateral center line of the target tape. In short, “as a whole” means the entire shape of the recess when the absorber has only one recess. When the absorber has a plurality of recesses, it means a recess design composed of the shape of each recess and an arrangement pattern composed of the plurality of recesses as a whole.

By forming the concave portion that can be perceived by touch from the outer surface on the surface on the non-skin facing surface side of the absorbent body so as to have the above-mentioned shape, the fastening tape can be symmetrically stopped on the target tape regardless of the visual sense. There is an advantage that it can be worn. Specifically, since the recess is formed so as to be line-symmetric with respect to the vertical center line of the target tape, use the fingers of both hands from the left and right side edges of the target tape to the vertical center line. By tracing the concave portion, the position of the vertical center line of the target tape can be easily found with a finger. In addition, since the recess is formed asymmetrically with respect to the horizontal center line of the target tape, the recess is formed from the position of the vertical center line of the target tape searched with the finger toward the left and right side edges of the target tape. By tracing with the fingers of both hands, it is possible to easily find a symmetrical position with respect to the vertical center line with the fingers. By fixing the fastening tape to the target tape with this position as a target, the fastening tape can be fixed symmetrically. Thus, according to the present invention, it is possible to easily exchange diapers in a dark place or diapers of persons with visual impairment.

For example, the following method can be employed to reliably align the target tape with the portion of the absorber where the recess is formed. Embossing is used to form the recess. The concave portion formed by embossing has higher light transmittance than other portions due to consolidation due to pressing. Positioning is performed using this light transmittance. For this purpose, an alignment mark is formed on the back sheet. The alignment mark can be formed by printing, for example. When a back sheet is superposed on one surface of the absorber, the light transmittance of the absorber is sensed by a known optical means, a portion having a high light transmittance, and an alignment mark formed on the back sheet, Are overlapped so that they match. Next, the target tape is overlaid on the outer surface of the back sheet using the alignment mark formed on the back sheet as a guide. By employ | adopting such a method, a target tape can be reliably aligned with the site | part in which the recessed part was formed among absorbers.

In the diaper 1 of the embodiment shown in FIG. 1, four

recesses

31 a, 31 b, 31 c, and 31 d are formed on the surface of the absorbent body 30 on the non-skin contact surface side. The

recesses

31a and 31d have the same size and shape. The

recesses

31b and 31c have the same size and shape as the

recesses

31a and 31d. All of the four concave portions are elliptical, and the major axis thereof coincides with the longitudinal direction X of the diaper 1. The

recesses

31a and 31d and the

recesses

31b and 31c are similar in shape. When an imaginary line I _{L including} four concave portions is considered, the imaginary line I _L draws an arch-shaped curve extending in the lateral direction of the target tape 50. In the imaginary line I _L made of this arch-shaped curve, the top of the arch faces the edge side of the ventral side A of the diaper 1. When attention is paid to a recess design composed of the shape of each recess and an arrangement pattern composed of the entire four recesses, the recess design is a line-symmetric shape with respect to the longitudinal center line L _V of the target tape 50. It has become. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50. The

recesses

31a and 31d are in a line-symmetric position with respect to the vertical center line L _V. Similarly, the

recesses

31b and 31c are also in a line-symmetric position with respect to the vertical center line L _V.

When wearing the diaper 1 of the present embodiment, the fingers of both hands are used to sequentially trace the recesses along the imaginary line I _L from the left and right side edges of the target tape 50 toward the vertical center line L _V. , the position of the longitudinal center line L _V can easily find out that a finger. Then, from the position of the longitudinal center line L _V in which Saguriate a finger, towards the side edges of the left and right of the target tape 50, by tracing with a finger of both hands recess along an imaginary line I _L, the longitudinal centerline L You can easily find a position symmetrical to _V with your finger.

In particular, in the present embodiment, since the sizes of the

recesses

31a and 31d and the

recesses

31b and 31c are different, it is easier to find a position symmetrical with respect to the vertical center line L _V. From the viewpoint of further facilitating this, the depth of the recess may be changed symmetrically from the vertical center line L _V toward the left and right sides. For example recess 31b located in the longitudinal center line L _V closer, relatively shallow form 31c, and recess 31a located on the left and right side edges closer can be relatively deep form 31d. Alternatively, conversely, the

recesses

31b and 31c may be formed relatively deep and the

recesses

31a and 31d may be formed relatively shallow.

FIG. 2 to FIG. 10 show diapers according to an embodiment different from that in FIG. Regarding the embodiment shown in these drawings, the description of the above-described embodiment is applied to matters common to the above-described embodiment. Therefore, the description of matters common to the above-described embodiment is omitted. The embodiment shown in FIGS. 2A and 2B also has a plurality of recesses, similarly to the embodiment shown in FIG. In FIG. 2A, six recesses 31 a to 31 f having the same elliptical shape are discontinuously formed in the lateral direction of the target tape 50. An imaginary line (not shown) formed by smoothly connecting the centers of the oval concave portions 31 a to 31 f draws a gentle arch-shaped curve extending in the lateral direction of the target tape 50. Further, the recesses 31a to 31f have different long axis inclinations, and the inclinations are line symmetric with respect to the longitudinal center line L _V. As a result, when attention is paid to a recess design composed of the shape of each recess 31a to 31f and an arrangement pattern composed of the entire six recesses 31a to 31f, the recess design is determined by the vertical center line of the target tape 50. and it has a line-symmetrical with respect to L _V. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

In FIG. 2B, seven concave portions 31 a to 31 g having the same elliptical shape are formed discontinuously over the lateral direction of the target tape 50. An imaginary line (not shown) formed by smoothly connecting the centers of the ellipsoidal recesses 31 a to 31 g draws an arch-shaped curve extending in the lateral direction of the target tape 50. Each of the recesses 31a to 31g has the long axis direction coincident with the longitudinal direction of the diaper 1. Of the five recesses 31a ~ 31 g, recess 31d in the center, the major axis is arranged so as to be positioned on the longitudinal center line L _V. The concave portions 31a to 31g are arranged so as to be symmetric with respect to the vertical center line L _V. As a result, when attention is paid to the recess design consisting arrangement pattern composed of the whole of the seven recesses 31a ~ 31 g, recess design, a line symmetrical with respect to the longitudinal centerline L _V of the target tape 50 ing. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

In the embodiment shown in FIG. 3, concave portions 31a to 31c having substantially the same cross shape and the same size and shape are formed. Each of the recesses 31a to 31c is arranged such that the longitudinal direction and the horizontal direction of the substantially cross shape coincide with the longitudinal direction and the width direction of the diaper. Of the three concave portions 31a ~ 31c, the center of the recess 31b is an intersection of the vertical and horizontal axes, than the transverse center line L _H of the target tape, is offset to the front end portion of the diaper. And the recess 31b, the vertical axis is located on the longitudinal center line L _V in the target tape. Recesses 31a of the left and right sandwiching the

recess

31b, 31c is the intersection of the vertical axis and the horizontal axis, is offset to the crotch portion of the diaper than the transverse center line L _H. An imaginary line (not shown) formed by smoothly connecting the intersections of the vertical axis and the horizontal axis in each of the recesses 31 a to 31 c draws a gentle arch-shaped curve extending in the horizontal direction of the target tape 50. The concave portions 31a to 31c are arranged so as to be line symmetric with respect to the vertical center line L _V. As a result, when attention is paid to the recess design consisting arrangement pattern composed of the whole of the three recesses 31a ~ 31c, the recess design, a line symmetrical with respect to the longitudinal centerline L _V of the target tape 50 It has become. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

The concave portion in the embodiment shown in FIGS. 4A to 4C is a single one constituted by a combination of a plurality of arch-shaped curved portions. In the embodiment shown in FIG. 4A, the ends of the three curved portions 31a to 31c are joined together to form one concave portion 31 having a wavy curved shape extending in the lateral direction of the target tape 50. ing. The recess 31 has a shape of line symmetry with respect to the longitudinal center line L _V of the target tape 50. Each of the curved portions 31 a to 31 c forming the arch shape is arranged so as to have a top portion in the same direction in the longitudinal direction of the target tape 50. Specifically, it arrange | positions so that it may have a top part toward the edge part side of the belly side part of a diaper. Of the three curves sites 31a ~ 31c, a curve portion 31b located in the center, rather than the transverse centerline L _H of the target tape 50, is offset to the front end portion of the diaper. Right and left curved portions 31a sandwiching the

curved portions

31b, 31c is biased to the crotch portion of the diaper than the transverse center line L _H.

In the embodiment shown in FIG. 4B, one end portion of the two

curved portions

31 a and 31 b is coupled to each other, and one concave portion 31 having a wavy curved shape extending in the lateral direction of the target tape 50 is formed. Is formed. Two curves sites 31a, the junction of 31b is a on the vertical center line L _V of the target tape 50, and located deviated to the end of the flank of the diaper than the transverse center line L _H ing. Each end of the recess 31 is positioned so as to offset the crotch portion of the diaper than the transverse center line L _H. The recess 31 has a shape of line symmetry with respect to the longitudinal center line L _V of the target tape 50. Each of the

curved portions

31a and 31b is disposed so as to have a top portion toward the end of the belly side of the diaper.

In the embodiment shown in FIG. 4C, as in the embodiment shown in FIG. 4B, one end portions of the two

curved portions

31a and 31b are coupled to each other in the lateral direction of the target tape 50. One concave portion 31 having an extending corrugated curved shape is formed. However, unlike the embodiment shown in FIG. 4 (b), each of the

curved portions

31a and 31b is arranged so as to have a top portion toward the crotch portion side of the diaper. About other points, it is the same as that of embodiment shown in FIG.4 (b).

Thus, in the embodiment shown in Figures 4 (a) (c), 1 pieces of recesses 31 extending in the transverse direction of the target tape 50, a line symmetrical with respect to the longitudinal centerline L _V of the target tape 50 It has become. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50. In particular, in the embodiment shown in FIG. 4 (a), the curve bending direction changes abruptly at the connection point between the curved portion 31b located in the center and the

curved portions

31 and 31c located on the left and right sides thereof. It is easy to find the position of the coupling point with a finger. Therefore, it becomes easier to fasten the fastening tape symmetrically.

5, as in the embodiment shown in FIGS. 4A to 4C, the ends of the plurality of arch-shaped curved portions 31 a to 31 c are coupled to each other so that the target tape 50 One concave portion 31 having a wave-like curved shape extending in the lateral direction is formed. However, the present embodiment is different from the embodiment shown in FIGS. 4A to 4C in the direction in which the top portions of the curved portions 31a to 31c face. Specifically, among the three arch-shaped curved portions 31a to 31c, there are a direction in which the top of the central arch-shaped curved portion 31b faces and a direction in which the tops of the left and right arch-shaped

curved portions

31a and 31c face. The curved portions of each arch shape are arranged so as to be reversed by 180 degrees. The top of the central curved portion 31b faces the end side of the ventral side of the diaper. The tops of the left and right

curved portions

31a, 31c face the crotch lower side of the diaper. The top of the central curved portion 31b is biased toward the front end side of the diaper with respect to the horizontal center line L _H of the target tape 50. The end portion of the middle curve portion 31b, the right and left curve portion 31a, the coupling portion between the end portion of the 31c, than the transverse center line L _H, are biased to the crotch portion of the diaper. Similarly, each end of the recess 31 also than the transverse center line L _H, are biased to the crotch portion of the diaper. The concave portion 31 having such a shape is axisymmetric with respect to the longitudinal center line L _V of the target tape 50. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50. In the present embodiment, the direction of the curve changes with the tops of the

curved portions

31 and 31c positioned on the left and right, so that the position of the vertex can be easily found with a finger. Therefore, it becomes easier to fasten the fastening tape symmetrically.

In the embodiment shown in FIG. 6, the position of the line symmetrical with respect to the longitudinal center line L _V of the target tape 50, a pair of wave curved recesses 31 and 31 are formed. Each recess 31 extends in the lateral direction of the target tape 50. Each of the recesses 31 is formed by joining the ends of three arch-shaped curved portions 31a to 31c having the same size and shape. Recess 31 these curves sites 31a ~ 31c formed by bonding, of its two ends, an end portion positioned on the longitudinal center line L _V closer is, and displaced to the crotch portion of the diaper, and the target The end located near the side edge of the tape 50 is biased toward the end of the belly side of the diaper. As a result, each recess 31 has a longitudinal center line L _V of the target tape 50 is in a state inclined toward the side edge side. Therefore, when attention is paid to a recess design composed of the shape of each recess 31 and an arrangement pattern formed by the entirety of the two recesses 31, the recess design corresponds to the longitudinal center line L _V of the target tape 50. It is line symmetric. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

In the embodiment shown in FIG. 7, as in the embodiment shown in FIGS. 4 to 6, a recess 31 having an arch-shaped curved portion is formed. However, in the present embodiment, unlike the embodiments shown in FIGS. 4 to 6, the end portions of the curved portions are not coupled, and the curved portions are independent. As a result, three recesses 31 are formed in the absorber 30. Each recess 31 extends in the lateral direction of the target tape 50. Moreover, each recessed part 31 is arrange | positioned so that it may have a top part in the same direction as the vertical direction of the target tape 50. FIG. Specifically, it arrange | positions so that it may have a top part toward the edge part side of the belly side part of a diaper. Of the three recesses 31, the recess 31 located at the center is biased from the lateral center line L _H of the target tape 50 toward the end of the belly side of the diaper. Recess 31 of the right and left sandwiching the recess 31 located in the center is positioned so as to straddle the transverse center line L _H. As a result, when attention is paid to a recess design composed of the shape of each recess 31 and an arrangement pattern constituted by the entire three recesses 31, the recess design corresponds to the longitudinal center line L _V of the target tape 50. It is line symmetrical. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

In the embodiment shown in FIG. 8, an arch-shaped recess 31 a extending in the width direction is formed over substantially the entire width direction of the absorber 30. This arch-shaped recess 31a has its apex facing toward the end of the belly side of the diaper. The top is biased from the lateral center line L _H of the target tape 50 so as to be biased toward the end of the belly side of the diaper. Two ends, than the lateral centerline L _H, are positioned offset to the crotch portion of the diaper. Furthermore, in this embodiment, in addition to the arch-shaped recess 31a, three oval small recesses 31b are formed. The elliptical small recess 31b is arranged such that its long axis coincides with the longitudinal direction of the diaper. The position of the center of each small recess 31b is at the same position in the width direction of the diaper. Of the three small recesses 31b, small recesses 31b in the center, the long axis is located on the longitudinal center line L _V of the target tape 50. The pair of small recesses 31b located on the left and right are arranged so as to overlap with the site in the vicinity of the end of the arch-shaped recess 31a. There is no overlap between the small recess 31b located at the center and the arch-shaped recess 31a.

Recess

31a, and 31b of the shape, when focusing on the concave design consisting arrangement pattern composed of the whole of the

recesses

31a, 31b, recess design, symmetric with respect to the longitudinal center line L _V of the target tape 50 It is in shape. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

As described above, in the embodiment shown in FIGS. 4 to 8, at least one arch-shaped recess extending in the horizontal direction of the target tape 50 and having a top portion in the vertical direction of the target tape 50 is formed. On the other hand, the embodiment shown in FIGS. 9A and 9B is different from the previous embodiments in that the recesses are linear. In the embodiment shown in FIG. 9 (a), in the vicinity of the longitudinal center line L _V of the target tape 50, the line symmetry with respect to the longitudinal center line L _V, a pair of linear first recesses 31a are formed . The first recess 31 a extends in parallel with the horizontal center line L _H of the target tape 50. The first recess 31a is biased in the crotch portion of the slightly diaper than the position of the transverse center line L _H. In the present embodiment, the side region of the left and right of the absorber 30, the line symmetry with respect to the longitudinal center line L _V, linear second recess 31b of the three pairs are formed. Each second recess 31 b extends in parallel with the horizontal center line L _H of the target tape 50. Further, each of the second recess 31b, rather than the position of the transverse center line L _H, are biased to the crotch portion of the diaper. Further, in the present embodiment, a pair of linear third recesses 31c extending in the longitudinal direction of the target tape 50 are formed between the first recess 31a and the second recess 31b. The third recess 31 c is formed so as to cross the horizontal center line L _H over substantially the entire length of the target tape 50 in the vertical direction.

In the embodiment shown in FIG. 9B, a substantially X-shaped first recess 31a is formed over substantially the entire region of the absorber that overlaps the target tape 50. The intersection point of the substantially X-shaped first recess 31 a substantially coincides with the position of the intersection point of the vertical center line L _V and the horizontal center line L _H of the target tape 50. The first recess 31a has a pair of lower

straight portions

311a and 312a positioned on the crotch lower side than the horizontal center line L _H and a pair of ends positioned on the abdomen side of the diaper from the horizontal center line L _H. It is composed of upper

straight portions

313a and 314a. The lower

straight portions

311a and 312a are longer than the upper

straight portions

313a and 314a. As a result, the first recess 31 is asymmetrically with respect to the transverse center line L _H. In the present embodiment, the linear second concave portion 31b and the third concave portion 31c are formed between the upper straight portion 313a and the lower straight portion 311a and between the upper straight portion 314a and the lower straight portion 312a. Yes. The second recess 31b is formed along the upper

straight portions

313a and 314a. On the other hand, the third recess 31c is formed along the lower

straight portions

311a and 312a. The second recess 31b, rather than the transverse centerline L _H of target tape 50 is located at the end of the flank of the diaper. On the other hand, the third recess 31 c is located on the crotch lower side than the lateral center line L _H of the target tape 50. The third recess 31c is longer than the second recess 31b. Further, the third recess 31c is located closer to the outside in the lateral direction of the target tape 50 than the second recess 31b.

As described above, in the embodiment shown in FIGS. 9A and 9B as well, in the same manner as the embodiments described so far, the shape of each recess and the arrangement pattern constituted by the entirety of the plurality of recesses. When the focus is placed on the recess design consisting of the above, the recess design is axisymmetric with respect to the longitudinal center line L _V of the target tape 50. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

In the embodiment shown in FIG. 10, a first recess 31 a having a predetermined width extending in the vertical direction of the target tape 50 is formed along the vertical center line L _V of the target tape 50. The 1st recessed part 31a is comprised from the aggregate | assembly of several small recessed parts. The first recess 31 a is formed over substantially the entire length of the target tape 50 in the vertical direction. In the present embodiment, a pair of second concave portions 31 b having a predetermined width extending in the vertical direction of the target tape 50 are formed in the left and right side regions of the target tape 50. The 2nd recessed part 31b is comprised from the aggregate | assembly of several small recessed parts similarly to the 1st recessed part 31a. The second recess 31 b has the position of the horizontal center line L _H of the target tape 50 as one end, and the other end is positioned at the lower end edge of the target tape 50. Further, in the present embodiment, a pair of linear third recesses 31c extending in the lateral direction of the target tape 50 are provided between the first recess 31a and the second recess 31b. The third recess 31 c is located on the horizontal center line L _H of the target tape 50. As described above, also in this embodiment, when attention is paid to the concave design composed of the shape of each concave portion 31a to 31c and the arrangement pattern constituted by the entirety of the plurality of concave portions 31a to 31c, the concave portion design is It has become a line-symmetrical to the longitudinal center line L _V of the target tape 50. Further, it is asymmetric with respect to the horizontal center line L _H of the target tape 50.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the shape and arrangement position of the recesses in each embodiment can be combined with each other as appropriate.

Moreover, in the said embodiment, although the recessed part was formed only in the area | region which overlaps with the target tape 50 in the absorber 30, also in the position which does not overlap with the target tape 50 for the objective different from the appropriate attachment of a fastening tape. The formation of the recess is not hindered.

Regarding the above-described embodiment, the present invention further discloses the following disposable diaper and a manufacturing method thereof.

<1> A top sheet positioned on the skin facing surface side of the wearer, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between the two sheets, and in the wearer's inseam in the mounted state A crotch portion that is positioned, and an abdominal side portion and a dorsal side portion extending from the front and back of the crotch portion, provided with fastening tapes on left and right side regions of the dorsal side portion, In disposable diapers with target tape to which fastening tape is fastened,
The absorber has one or more recesses formed continuously or discontinuously over the width direction of the absorber in a region overlapping with the target tape, and the presence of the recess is a diaper. It can be perceived by touch from the outer surface of the back sheet side of
The disposable diaper as a whole is formed so as to be axisymmetric with respect to the longitudinal center line of the target tape and to be asymmetric with respect to the lateral center line of the target tape. .

The disposable diaper as described in said <1> in which the <2> above-mentioned recessed part is formed by the embossing given from the non-skin opposing surface side of the said absorber.
<3> The disposable diaper according to <1>, wherein the concave portion is formed by thinly forming a portion that should become the concave portion when the absorbent body is manufactured by stacking a liquid-retaining fiber material.
<4> The disposable diaper according to any one of <1> to <3>, wherein the concave portion is configured by an assembly of a plurality of small concave portions.

<5> The disposable according to any one of <1> to <3>, wherein the absorbent body has a plurality of the recesses, and the plurality of recesses are formed discontinuously over the lateral direction of the target tape. Diapers.
<6> The disposable diaper according to <5>, wherein the two or more concave portions are formed discontinuously across the lateral direction of the target tape.
<7> The <5> or <5> in which the absorbent body has four of the concave portions, each of the four concave portions has an elliptical shape, and a long axis thereof coincides with a longitudinal direction of the diaper. Disposable diapers described in 6>.

<8> An imaginary line connecting the four concave portions draws an arch-shaped curve extending in the lateral direction of the target tape, and the imaginary line consisting of the arch-shaped curve is such that the top of the arch is the ventral side of the diaper The disposable diaper according to <7>, wherein the disposable diaper faces the edge side.
<9> The concave portion has a substantially cruciform shape, and the concave portion is disposed so that a longitudinal axis direction and a horizontal axis direction of the substantially cruciform shape coincide with a longitudinal direction and a width direction of the diaper. The disposable diaper as described in 5> or <6>.
<10> The absorber according to any one of <1> to <3>, wherein the absorber has one of the recesses, and the recess is continuously formed so as to extend in a lateral direction of the target tape. Disposable diapers.

<11> The concave portion is of an arch shape with the top facing the end side of the ventral side of the diaper.
The top is biased to the end of the ventral side of the diaper from the lateral center line of the target tape,
The absorbent body is further formed with three oval small recesses,
The small recess is arranged such that its long axis coincides with the longitudinal direction of the diaper,
The center position of each small recess is the same position in the width direction of the diaper,
Of the three small concave portions, the small concave portion located in the center has a long axis located on the longitudinal center line of the target tape, and the pair of small concave portions located on the left and right are the arch-shaped ones. The disposable diaper according to <10>, wherein the disposable diaper is disposed so as to overlap with a portion in the vicinity of the end of the recess.
<12> The method according to any one of <1> to <3>, wherein at least one arch-shaped concave portion extending in a lateral direction of the target tape and having a top portion in a longitudinal direction of the target tape is formed. Disposable diapers.

<13> Two or more arch-shaped recesses are formed, and each arch-shaped recess is arranged across the lateral direction of the target tape, and the top is directed in the same vertical direction of the target tape. The disposable diaper according to <12>, wherein the disposable diaper is arranged to have
<14> The disposable diaper according to the above <12>, wherein the concave portion includes a single concave portion constituted by a combination of a plurality of arch-shaped curved portions.
<15> One end of the two curved portions is coupled to each other, and the one concave portion having a wavy curved shape extending in the lateral direction of the target tape is formed,
The connecting portion of the two curved portions is located on the longitudinal center line of the target tape and biased toward the end of the ventral side of the diaper from the lateral center line,
The disposable diaper according to the above <14>, wherein each end of the concave portion is biased and located closer to the crotch lower side of the diaper than the lateral center line.

<16> A pair of corrugated concave portions are formed at positions symmetrical with respect to the longitudinal center line of the target tape,
Each recess extends in the lateral direction of the target tape,
Each concave portion is composed of three end portions of the curved portion having the same arch shape and the same arch shape,
The concave portion formed by combining these curved portions has an end portion of the two end portions located closer to the longitudinal center line displaced to the crotch lower side of the diaper, and a side edge of the target tape. The end located nearer is biased toward the end of the belly side of the diaper, and as a result, each recess is inclined from the longitudinal center line of the target tape toward the side edge. The disposable diaper described in <12>.
<17> Three arch-shaped recesses are formed, and each arch-shaped recess is arranged in the lateral direction of the target tape, and among the three arch-shaped recesses, a central arch shape is formed. The disposable diaper according to <12>, wherein the arch-shaped recesses are arranged so that the direction in which the tops of the recesses face is opposite to the direction in which the tops of the left and right arch-shaped recesses face 180 degrees.

<18> The disposable diaper according to <12>, wherein ends of the arch-shaped recess are joined to form a curved recess extending in a lateral direction of the target tape.
<19> The ends of the three arch-shaped recesses are joined together to form one recess having a wavy curved shape extending in the lateral direction of the target tape,
The top part of the concave part of the central arch shape faces the end part side of the abdominal side part of the diaper, and the top part of the concave part of the left and right arch shape faces the crotch part side of the diaper,
The top of the recess having a central arch shape is biased toward the front end side of the diaper from the lateral center line of the target tape,
The connecting portion between the end portion of the concave portion having a central arch shape and the end portions of the concave portions having left and right arch shapes is biased toward the crotch side of the diaper rather than the lateral center line,
The disposable diaper according to <18>, wherein each end portion of the one concave portion is biased toward the crotch lower side of the diaper than the lateral center line.
<20> The three concave portions having an arch-shaped curved portion are formed,
The ends of the curved parts are not connected, and each curved part is independent,
Each recess extends in the lateral direction of the target tape,
Each recessed part 31 is arrange | positioned so that it may have a top toward the edge part side of the belly side part of a diaper,
Of the three recesses, the recess located at the center is offset from the lateral center line of the target tape toward the end of the belly side of the diaper, and sandwiches the recess located at the center. The disposable diaper according to <12>, wherein the left and right recesses are positioned so as to straddle the horizontal center line.

<21> The recess according to any one of <1> to <20>, wherein the recess has a recess depth that is symmetrically changed from the longitudinal center line of the target tape toward the left and right sides. Disposable diapers.
<22> In the vicinity of the longitudinal center line of the target tape, a pair of linear first recesses are formed symmetrically with respect to the longitudinal center line,
The first recess extends in parallel with the horizontal center line of the target tape,
The first recess is biased toward the crotch side of the diaper from the position of the horizontal center line,
Three pairs of linear second recesses are formed in the left and right side regions of the absorber in line symmetry with respect to the vertical center line,
Each second recess extends in parallel with the horizontal center line of the target tape,
Each second recess is biased toward the crotch side of the diaper rather than the position of the horizontal center line,
A pair of linear third recesses extending in the vertical direction of the target tape are formed between the first recess and the second recess,
The disposable diaper according to any one of <1> to <3>, wherein the third recess is formed so as to cross a horizontal center line over substantially the entire length of the target tape in the vertical direction.

<23> A substantially X-shaped first recess is formed over substantially the entire region of the absorber that overlaps the target tape,
The intersection point of the substantially X-shaped first recess substantially coincides with the position of the intersection point of the vertical center line and the horizontal center line of the target tape,
A 1st recessed part is comprised from a pair of lower straight part located in the crotch part side rather than a horizontal centerline, and a pair of upper straight part located in the edge part side of the stomach side part of a diaper rather than a horizontal centerline. And
The lower straight part is longer than the upper straight part, and as a result, the first recess is asymmetric with respect to the lateral center line,
Between the upper straight portion and the lower straight portion, and between the upper straight portion and the lower straight portion, a linear second concave portion and a third concave portion are formed,
The second recess is formed along the upper straight part,
The third recess is formed along the lower straight part,
The second recess is located on the end side of the diaper of the diaper from the lateral center line of the target tape,
The third recess is located on the crotch lower side than the horizontal center line of the target tape,
The third recess is longer than the second recess,
The disposable diaper according to any one of <1> to <3>, wherein the third recess is located closer to the outside in the lateral direction of the target tape than the second recess.

<24> A first recess having a predetermined width extending in the longitudinal direction of the target tape is formed along the longitudinal center line of the target tape,
The first recess is composed of an assembly of a plurality of small recesses,
The first recess is formed over substantially the entire longitudinal direction of the target tape,
A pair of second recesses having a predetermined width extending in the longitudinal direction of the target tape are formed in the left and right side regions of the target tape,
The second recess is composed of an assembly of a plurality of small recesses,
The second recess has the position of the horizontal center line of the target tape as one end, and the other end is located at the lower end edge of the target tape,
A pair of linear third recesses extending in the lateral direction of the target tape is provided between the first recess and the second recess,
A 3rd recessed part is a disposable diaper any one of said <1> thru | or <3> located on the horizontal centerline of a target tape.

<25> The disposable diaper according to any one of <1> to <24>, wherein the disposable diaper is a tape-fixed type disposable diaper that is attached by fastening the fastening tape to the target tape.
<26> The fastening tape has a base sheet and a fastening portion provided on a surface facing the same side as the top sheet in the base sheet,
The disposable diaper according to any one of <1> to <25>, wherein a hook member of a hook-and-loop fastener or an adhesive is used as the fastening portion.
<27> The <1> to <1>, wherein the target tape has a horizontally long rectangular shape and has a longitudinal direction that is the same as the longitudinal direction of the diaper and a lateral direction that is the same as the width direction of the diaper. The disposable diaper of any one of 26>.

<28> The method for producing a disposable diaper according to <1>,
Under the state where the top sheet is disposed on one surface side of the absorber and the back sheet is disposed on the other surface side, the embossing is performed from the top sheet side through the top sheet, The manufacturing method of the disposable diaper which forms the said recessed part also in the surface of the non-skin opposing surface side while forming the said recessed part in the surface by the side of the skin opposing surface of an absorber.
<29> The method for producing the disposable diaper according to <1>,
An absorbent body is formed by wrapping the piled body with a sheet, and pressing is performed by embossing from the skin facing surface side of the absorbent body to form the concave portion on the surface of the absorbent body on the skin facing side and non-skin facing The manufacturing method of the disposable diaper which forms the said recessed part also in the surface side surface.

According to the absorbent article of the present invention, the position where the fastening tape is fixed symmetrically can be easily recognized by touching the target tape located on the absorber. Therefore, since the fastening tape can be fixed symmetrically regardless of vision, diapers in a dark place and diapers of persons with visual impairment can be easily replaced.

Claims

Inseam located on the wearer's inseam in a wearing state, comprising a top sheet located on the skin facing surface side of the wearer, a back sheet located on the non-skin facing surface side, and an absorber interposed between both sheets And a stomach side portion and a back side portion extending from the front and back of the crotch portion, the fastening tape is provided on the left and right side regions of the back side portion, and the fastening tape is provided on the outer surface of the stomach side portion. In disposable diapers with target tapes to be fastened,
The absorber has one or more recesses formed continuously or discontinuously over the width direction of the absorber in a region overlapping with the target tape, and the presence of the recess is a diaper. It can be perceived by touch from the outer surface of the back sheet side of
The disposable diaper as a whole is formed so as to be axisymmetric with respect to the longitudinal center line of the target tape and to be asymmetric with respect to the lateral center line of the target tape. .
The disposable diaper according to claim 1, wherein the recess is formed by embossing applied from the non-skin facing surface side of the absorber.
The disposable diaper according to claim 1, wherein the concave portion is formed by thinning a portion to be the concave portion when the absorbent body is manufactured by stacking a liquid retaining fiber material.
The disposable diaper according to any one of claims 1 to 3, wherein the concave portion is composed of an assembly of a plurality of small concave portions.
The disposable diaper according to any one of claims 1 to 4, wherein two or more of the concave portions are formed discontinuously over the lateral direction of the target tape.
The disposable diaper according to any one of claims 1 to 5, wherein at least one arch-shaped concave portion extending in a lateral direction of the target tape and having a top portion in a longitudinal direction of the target tape is formed.
Two or more arch-shaped recesses are formed, and each arch-shaped recess is disposed across the lateral direction of the target tape and has a top portion in the same vertical direction of the target tape. The disposable diaper of Claim 6 arrange | positioned.
Three arch-shaped recesses are formed, and each arch-shaped recess is arranged in the lateral direction of the target tape, and among the three arch-shaped recesses, a central arch-shaped recess is formed. The disposable diaper according to claim 6, wherein the arch-shaped recesses are arranged so that the direction in which the top part is directed and the direction in which the top parts of the left and right arch-shaped recesses are directed are 180 degrees opposite to each other.
The disposable diaper according to claim 7 or 8, wherein ends of the arch-shaped recess are joined together to form a curved recess extending in a lateral direction of the target tape.
The disposable diaper according to any one of claims 1 to 9, wherein the concave portion has a concave portion depth that is symmetrically changed from the longitudinal center line of the target tape to the left and right sides.
It is a manufacturing method of the disposable diaper of Claim 1,
An absorbent body is manufactured by wrapping the laminated fiber with a sheet, and pressing is performed by embossing from the skin facing surface side of the absorbent body to form the concave portion on the surface of the absorbent body facing the skin and facing the non-skin The manufacturing method of the disposable diaper which forms the said recessed part also in the surface side surface.