TW201404383A - Disposable diaper - Google Patents

Abstract

This disposable diaper (10) is provided with: a liquid-impermeable leakage-preventing sheet (55) provided at the non-skin-contacting surface side of an absorbent main body (15); and a pair of leg-encircling extending/contracting sections (100). The leakage-preventing sheet (55) has: an overlapping region (R1) overlapping the leg-encircling extending/contracting sections (100) in a plan view of the disposable diaper (10); and a non-overlapping region (R2) that is positioned to the outside of in the product lengthwise direction (L) of the overlapping region (R1) and that does not overlap the leg-encircling extending/contracting sections (100). The overlapping region (R1) is formed at the portion at which the distance in the product widthwise direction (W) between one of the leg-encircling extending/contracting sections (100) and the other of the leg-encircling extending/contracting sections (100) becomes the narrowest and at the central section in the product lengthwise direction (L), and becomes narrower towards the outside in the product lengthwise direction (L).

Description

Disposable disposable diaper

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a disposable disposable diaper, and more particularly to a disposable disposable diaper that allows for the prevention of leakage from excrement near the lower portion of the crotch.

The disposable disposable diaper generally has a front waistline portion, a rear waistline portion, and a crotch portion, and forms a widest and narrowest shape of the crotch portion in order to correspond to the characteristics of the wearer's body. Further, in such a wide and narrow crotch portion, since a large load (load) is easily applied when the disposable diaper is worn after use, leakage of excrement from the vicinity of the crotch is easily induced.

Here, it is known that a liquid-impermeable leak-proof sheet (generally a plastic film sheet, a water-resistant non-woven fabric, etc.) is disposed in order to more closely adhere to the vicinity of the lower portion of the disposable disposable diaper. The entire portion of the leg-opening portion is formed, and the interval between the pair of leg-hole elastic members is reduced in the crotch portion, and the front waist portion and the rear waist portion side are widened (for example, Patent Document 1).

Moreover, it is known that there is no leakproof thinness in the outer sheet as a whole. In the case of the film, the structure of the leakage preventing sheet is provided only at the side of the inside of the absorbent body (the leaking surface of the excrement from the non-skin abutting sputum) (for example, Patent Document 2)

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. Hei-4-122257 (Fig. 3)

[Patent Document 2] Japanese Laid-Open Patent Publication No. 2000-107227 (Fig. 3)

However, in the conventional disposable diaper described above, there is a problem as follows. In other words, the disposable disposable diaper disclosed in Patent Document 1 is capable of preventing leakage due to exudation of excrement from the crotch portion which is most likely to be applied, and is low in ventilation. Since the leakage preventing sheet is covered to form the entire portion of the leg-opening portion, the skin around the leg circumference of the wearer who is in contact with the leakage preventing sheet by the elastic member is liable to cause an uncomfortable problem such as stuffiness.

Further, the disposable diaper disclosed in Patent Document 2 is a problem in which it is possible to suppress discomfort such as suffocation of the skin around the wearer's leg circumference, but it is not possible to sufficiently prevent the lower part of the crotch from being applied most easily from the load. The problem of leakage caused by exudates.

Accordingly, an object of the present invention is to provide a disposable disposable diaper which can prevent leakage of excrement from the vicinity of the crotch portion and further enhance the comfort of the wearer.

The present invention has a front waist portion (front waist portion 20), a rear waist portion (rear waist portion 30), and a crotch portion (bottom portion 25), and is provided with an absorbent body (absorbent body) containing liquid retention 40) a longitudinally long absorbent body (absorbent body 15); and a side flap (flank 70) provided at a side edge portion of the product in the width direction (product width direction W) of the absorbent body, in the aforementioned side flap A disposable disposable diaper (removable disposable diaper 10) having a leg-recessed portion (leg-surrounded recessed portion 35) recessed toward the center of the product in the width direction of the absorbent body, the main purpose of which is to have a liquid-impermeable leak-proof sheet (leak-proof sheet 55) provided on the non-skin contact surface side of the absorbent body, and a side end portion provided in the width direction of the product of the side flap, in formation The leg-recessed portion having the leg-recessed portion extends in the longitudinal direction of the product (the product length direction L), and at least a portion of the leg-surrounding and contracting portion (the leg-surrounding and contracting portion 100) that is stretchable along the longitudinal direction of the product, the leakage prevention The sheet is viewed from above in a disposable view of the disposable disposable diaper, and has: a repeating region (repetitive region R1) in which the leg-surrounding portion overlaps; and a non-overlapping region (non-overlapping region R2) which is located outside the product in the longitudinal direction of the repeating region, and the overlapping region is The narrowest portion of the distance between the one of the leg-surrounding and contracting portions and the other of the leg-surrounding and contracting portions in the product width direction is formed in the center portion in the longitudinal direction of the product, and the longer toward the longitudinal direction of the product The outer side becomes narrower, and the non-overlapping region is the outer side in the longitudinal direction of the product in the overlap region, and the distance between the one of the leg-surrounding and contracting portions and the other of the leg-surrounding portions is formed in the width direction of the product. a wider portion than the aforementioned repeating region.

10‧‧‧Disposable disposable diapers

15‧‧‧Absorbable ontology

20‧‧‧ front waist circumference

25‧‧‧ Lower part

30‧‧‧After waist circumference

35‧‧‧ leg circumference recess

40‧‧‧ absorber

40a‧‧‧Absorbent core

40b‧‧‧ core cladding

50‧‧‧ top sheet

55‧‧‧ leakproof sheets

60‧‧‧back sheet

65‧‧‧Target strips

70‧‧‧Flanking

80‧‧‧Thigh side flap

90‧‧‧ buckle

100‧‧‧ leg circumference expansion and contraction

110, 120, 130, 130A, 150, 150A‧‧‧ convex

125, 140, 140A, 160‧‧ ‧ recess

200‧‧‧Flexible sheets

R1‧‧‧repetition area

R2‧‧‧non-repeating area

Fig. 1 is a developed plan view of a disposable disposable diaper 10 according to an embodiment of the present invention.

Fig. 2 is an enlarged plan view showing the leg-surrounding and contracting unit 100 according to the embodiment of the present invention.

Fig. 3 is a view schematically showing a cross section of the disposable disposable diaper 10 taken along line F3-F3 shown in Fig. 1 .

Fig. 4 is a view schematically showing a state in which the disposable disposable diaper 10 of the present embodiment is worn by a wearer.

Fig. 5 is an enlarged plan view showing a leg-surrounding and contracting portion 100 according to a modified example of the present invention.

[Formation for carrying out the invention]

Next, an embodiment of the disposable disposable diaper of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar elements are denoted by the same or similar reference numerals. However, if the drawing is a pattern, it is necessary to pay attention to the case where the ratio of each size is different from the actual one.

Therefore, the specific dimensions and the like must be judged by referring to the following description. Further, the drawings are also provided with mutually different dimensional relationships and ratios.

(1) The overall outline shape of the disposable disposable diaper

Fig. 1 is a developed plan view of the disposable disposable diaper 10 of the embodiment. FIG. 2 is an enlarged plan view of the leg circumference expansion and contraction unit 100. Fig. 3 is a view schematically showing a cross section of the disposable disposable diaper 10 taken along line F3-F3 shown in Fig. 1 . In addition, in the expanded plan view shown in FIG. 1, the leg stretch portion 75 and the thigh side flap 80 are extended until the top sheet 50 and the side flaps 70 of the disposable diaper 10 are not wrinkled. The diagram of the state is illustrated in the state of convenience of the description, and is shown in a state in which the thigh side flap 80 is expanded and contracted.

As shown in FIGS. 1 to 3, the disposable disposable diaper 10 has a front waistline portion 20, a crotch portion 25, and a rear waistline portion 30. The front waistline portion 20 is a portion that is connected to the front waistline portion of the wearer. Further, the rear waistline portion 30 is a portion that is connected to the wearer's rear waistline portion. The crotch portion 25 is located between the front waistline portion 20 and the rear waistline portion 30. The absorbent body 15 is constituted by the front waist portion 20, the crotch portion 25, and the rear waist portion 30. In the present embodiment, the direction from the front waistline portion 20 toward the rear waistline portion 30 is referred to as the product length direction L, and the direction orthogonal to the product length direction L is referred to as the product width direction W.

The disposable disposable diaper 10 is formed with a pair of leg-opening portions 35. Specifically, the leg-surrounding recess 35 is formed at a side edge portion (specifically, the side flap 70) of the product in the width direction W of the absorbent body 15, and is recessed toward the center of the product width direction W. The leg-surrounding recess 35 is for wearing the disposable disposable diaper 10 on the wearer's side, and will be provided at the back waist. The buckle 90 of the surrounding portion 30 is engaged with the front waistline portion 20, specifically, the opening portion from the front waistline portion 20 to the rear waistline portion 30 by being engaged with the target strap piece 65. The leg-surrounding recess 35 is a position formed at the intersection of the center of the longitudinal direction L of the target belt piece 65 and the edge of the side flap 70 (E1 shown in FIGS. 1 and 2); and the lower portion 25 side of the buckle 90. The position of the base end (E2 shown in Figures 1, 2).

The disposable disposable diaper 10 includes an absorber 40 that extends across the crotch portion 25 to the front waistline portion 20 and the rear waistline portion 30. The absorbent body 15 has an elongated shape of the absorbent body 40 containing liquid retention. The absorber 40 is composed of an absorbent core 40a and a core cladding 40b.

The absorbent body 40 can be suitably formed using a known member such as pulverized pulp or a high-absorbent polymer, and a material similar to the disposable disposable diaper. The absorbent core 40a is wrapped by a sheet-like core cladding 40b. The core cladding 40b is a sheet covering the absorbent core 40a. At least part of the skin surface side of the core clad layer 40b is composed of various liquid non-woven fabrics or tissue sheets having liquid permeability. For example, a hot air fiber nonwoven fabric having a mass of about 10 to 30 g/m ² , a spunbonded nonwoven fabric, an SMS (spunbond-meltblown-spunbond) nonwoven fabric, or a tissue sheet having a mass of about 10 to 30 g/m ² can be used.

The liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40. In addition, a liquid-impermeable leakage preventing sheet 55 is provided on the back side (non-skin contact surface side) of the absorber 40. On the back side of the leakage preventing sheet 55, a back sheet 60 formed of a nonwoven fabric is provided. The leakage preventing sheet 55 is composed of a plastic film sheet or a non-woven fabric having improved water pressure resistance.

The side edges of the absorbent body 15 in the product width direction W are respectively provided with the side flaps 70 from the front waistline portion 20 across the rear waistline portion 30. The side flaps 70 are constituted by one or two or more sheets of non-woven fabrics stacked one on another. Further, each of the pair of side wings 70 is provided with a buckle 90.

A pair of left and right leg circumference expansion and contraction portions 100 are provided at side end portions of the side flaps 70 in the product width direction W. The leg-surrounding elastic portion 100 extends in the product longitudinal direction L in a region where the leg-surrounding concave portion 35 is formed, and is stretchable at least along a part of the product longitudinal direction L. Specifically, the leg circumference expansion-contraction portion 100 is an end portion of the leg-surrounding recess 35 that extends in the product longitudinal direction L.

In the present embodiment, the leg-surrounding and contracting portion 100 is a region including the stretchable sheet 200 (see FIG. 1), and the end edge of the leg-surrounding and contracting portion 100 in the product width direction is serpentine in the product longitudinal direction L. The stretch sheet 200 is formed of a stretchable nonwoven sheet. More specifically, the stretch sheet 200 is composed of a pair of non-stretch sheets and elastic members sandwiched by the pair of non-stretch sheets, and is stretched in the product longitudinal direction L. Configuration. That is, in the present embodiment, the leg-surrounding and contracting portion 100 is constituted by a sheet-like elastic member.

Moreover, the pair of leg-surrounding-and-expanding parts 100 (in the vicinity of the center of the product width direction W) are provided with a pair of thigh-side flaps 80 extending along the longitudinal direction L of the product. Further, the disposable disposable diaper 10 may include a waist hem that is disposed along the product width direction W of the front waistline portion 20 and the rear waistline portion 30.

(2) The shape of the leg circumference expansion and contraction portion 100

Next, the shape and the like of the leg-surrounding elastic portion 100 will be specifically described. As shown in FIG. 2, the leg circumference expansion-contraction part 100 is provided along the edge of the leg-surrounding recessed part 35 of the disposable disposable diaper 10.

Further, the leg-surrounding and contracting portion 100 can be manufactured by, for example, the following method. In other words, the stretchable sheet 200 is stretched along the shape of the leg hole and stretched while being cut beyond the front end and the rear end of the leg-surrounding recess 35. At this time, the stretch sheet 200 is sandwiched between the sheet constituting the side flap 70 or the thigh side flap 80 and the leakage preventing sheet, and is fixed to the sheet by an adhesive. Next, the stretchable sheet 200 and the sheet are cut along the leg recesses 35 by the cutting tool set to a predetermined cutting shape, whereby the leg stretch unit 100 can be formed.

In the present embodiment, the width W1 of the product width direction W along the natural state of the leg-surrounding portion 100 is 5 mm or more and 45 mm or less, and more preferably 12.5 m or more and 40 mm or less. When the thickness is less than 5 mm, the stress concentration by the stretch sheet 200 increases the burden on the wearer's skin. On the other hand, when it exceeds 35 mm, it is compared with the overall width of the disposable disposable diaper 10. The area around the leg becomes too wide, and the leg-surrounding portion 100 is easily caught in the body side of the wearer or is easily warped.

In addition, the natural state refers to a case where the disposable disposable diaper 10 is taken out from the package and placed in an environment of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 60 minutes. Moreover, the expansion ratio of the leg circumference expansion-contraction part 100 is set to 1.5 times or more and 2.4 times or less. By setting such an expansion ratio, the leg circumference stretching unit 100 can be appropriately attached to the wearer's body.

In addition, the expansion ratio refers to the degree of expansion and contraction of the product in the width direction W of the leg-surrounding and contracting portion 100, and is defined as follows.

The expansion ratio = (the length of the maximum elongation of the leg circumference stretchable portion 100 of the product) / (the length of the leg-length stretchable portion 100 of the product in the natural state)

In addition, the length of the maximum elongation is the product (the disposable disposable diaper 10) in which the leg circumference expansion-contraction part 100 of the measurement object is disposed, and the measurement is performed to extend the leg circumference to the extent that the product is not broken. The length of the product of the stretchable portion 100 in the width direction W. Moreover, the length in the natural state in which the product is in a contracted state is such that the product is placed on a flat surface so as not to apply a load which is elongated in the width direction of the product as much as possible, and the unevenness of the wrinkles is measured in a state of being minimized. The length of the product in the width direction W of the stretchable portion 100. Further, when the leg-surrounding and contracting portion 100 is bent in the present embodiment, it is preferable to measure the length of each of the above-described states along the line of the end portion of the stretchable sheet 200 on the inner side in the product width direction W.

Moreover, the leakage preventing sheet 55 has a repeating region R1 overlapping the leg-surrounding elastic portion 100 in a plan view of the disposable disposable diaper 10, and an outer side in the longitudinal direction L of the product in the overlapping region R1, without the leg circumference. The non-repetitive region R2 in which the stretchable portion 100 overlaps. Further, the non-overlapping region in which the leakage preventing sheet 55 and the leg-surrounding portion 100 do not overlap is also present inside the product width direction W of the repeating region R1. However, the non-overlapping region refers to the position in the overlapping region R1. The non-overlapping region R2 on the outer side in the longitudinal direction L of the product is different.

The repeating region R1 is one side and the leg circumference of the leg circumference expansion and contraction portion 100 The distance d3 in the product width direction W between the other of the expansion-contraction parts 100 becomes the narrowest part, and is formed in the center part of the product longitudinal direction L. The width of the overlap region R1 is because the leg-surrounding portion 100 is curved, so that the outer side of the product length direction L becomes narrower. The non-overlapping region R2 is a portion that is formed outside the product length direction L of the overlap region R1 and has a wider distance d3 than the overlap region R1. Further, the overlap region R1 of the leakage preventing sheet 55 is disposed on the inner side of the end portion of the leg-surrounding portion 35 in the longitudinal direction L of the product.

In the present embodiment, as shown in FIG. 3, at a position corresponding to at least one of the front waistline portion 20 and the crotch portion 25, the thickness of the leg circumference expansion-contraction portion 100 in the product width direction W is larger than the leg circumference expansion portion. It is desirable that the thickness of the inner side of the product 100 is thinner in the width direction W. Specifically, the thickness of the edge of the product in the width direction W of the leg-surrounding portion 100 is such that the number of sheets of the laminated sheet is smaller in the vicinity of the end edge and is thinner than the inner side in the width direction W of the product. In the present embodiment, as shown in FIG. 3, three sheets (the thigh side flap 80, the stretch sheet 200, and the side sheet portion (T1 in the drawing) in the product width direction W of the leg circumference stretchable portion 100 are provided. Back sheet 60). On the other hand, four sheets (addition of the leakage preventing sheet 55) are provided in the inner portion (T2 in the drawing) of the product in the width direction W of the leg-surrounding portion 100.

Since the portion of the disposable diaper 10 corresponding to the squirrel portion of the wearer is the portion that is most likely to bite by the movement of the leg, the width direction of the product of the leg-surrounding portion 100 is thus obtained. The end edge portion of W is formed to be thinner than the inner side in the width direction W of the product. When the disposable disposable diaper 10 is worn, the leg elasticized portion 100 is easily adhered from the inner side in the product width direction W toward the outer side. Therefore, improve the area around the groin The adhesion and stability of the leg-surrounding and contracting portion 100 can stably exert the effect of the pressure distribution of the leg-surrounding and contracting portion 100 on the skin.

In addition, the joining of the stretchable sheet and the non-stretchable sheet constituting the leg-surrounding and contracting portion 100 is performed by applying a pattern by the application of the adhesive present portion and the non-existing portion by a spiral coating or a so-called omega-coated linear adhesive. . Further, the stretch sheet is a nonwoven sheet composed of elastic stretch fibers. According to these configurations, the end portions of the leg-surrounding recesses 35 are because the non-woven sheet fibers are entangled with each other, so that the disposable disposable diaper 10 does not open during use, and since there is no entire end portion of the leg-surrounding recess 35 The presence of the subsequent agent allows a softer leg circumference expansion and contraction portion 100 to be formed.

Moreover, according to the above-described application, the stretchability of the stretchable sheet can be suppressed from being impeded by the non-stretchable sheet, and the adhesion to the wearer's body in the vicinity of the leg-surrounded portion 35 can be improved.

Fig. 4 is a view schematically showing a state in which the disposable disposable diaper 10 is attached to the wearer after use. In order to make the stress easy to concentrate at the front end and the rear end of the leg-surrounding recess 35, it is preferable to form a state in which the pressure on the skin can be more dispersed. Specifically, since the position is provided at the base end of the buckle 90 and the target strip 65 of the front waistline 20 and is located at the front end and the rear end of the leg recess 35, the stress is easily concentrated, and since it is used When the disposable diaper 10 is worn, it is a certain portion that is overlapped before and after, so that it is preferable to form a convex shape to disperse the pressure on the skin.

(3) Function and effect

According to the disposable disposable diaper 10, the leg-surrounding elastic portion 100 is provided at the side end portion of the side flap 70 in the product width direction W, and extends in the product longitudinal direction L in the region where the leg-surrounding concave portion 35 is formed. In addition, the overlap region R1 is the portion where the distance d3 between the one of the leg-surrounding and contracting portions 100 and the other of the leg-surrounding and contracting portions 100 in the product width direction W is the narrowest, and is formed in the center portion of the product longitudinal direction L. The non-overlapping region R2 is outside the product length direction L of the repeating region R1, and is formed at a portion wider than the repeating region R1 by the distance d3. Therefore, when the disposable diaper 10 is worn, the leg-surrounding stretchable portion 100 is stretched toward the longitudinal direction L of the product, and the overlap region R1 of the leakage preventing sheet 55 is a leg that is bent by the leg-concave recess 35. The circumference stretchable portion 100 protrudes outward in the product width direction W. As described above, when the leakage preventing sheet 55 protrudes outward in the product width direction W, the leakage preventing sheet 55 is lifted toward the wearer's body in the crotch portion 25 in the mounted state of the disposable disposable diaper 10 ( Refer to the dotted line arrow of Fig. 4 for such a state.

Therefore, it is possible to surely prevent leakage of excrement from the vicinity of the crotch portion 25 by the leakage preventing sheet 55 which is lifted toward the upper side of the wearer's body. Further, since the leakage preventing sheet 55 is not in direct contact with the wearer's skin, and the leg circumference stretching portion 100 comes into contact with the wearer's skin, the wearer's comfort can be further improved.

In the present embodiment, the leg-surrounding-and-expanding portion 100 is formed of a sheet-like elastic member, specifically, the stretchable sheet 200, and extends to the end portion of the leg-surrounding portion 35 in the longitudinal direction L of the product. Further, the repeating region R1 is the end of the leg-surrounding portion 35 which is longer than the longitudinal direction L of the product. The department is more arranged on the inside. Therefore, the leg-surrounding and contracting portion 100 can be brought into close contact with the wearer's leg circumference, and the leakage preventing sheet 55 of the repeating region R1 can be surely adhered to the wearer's body. On the other hand, since the leakage preventing sheet 55 does not exist at the end portion of the leg-surrounding recess 35, the air permeability of the leg circumference can be ensured.

In the present embodiment, the leg-surrounding and contracting portion 100 is composed of a pair of non-stretchable sheets and elastic members sandwiched by the pair of non-stretchable sheets, and is stretched in the longitudinal direction L of the product. The status is configured. Therefore, at the time of installation of the disposable disposable diaper 10, wrinkles (wrinkles) along the width W of the product are formed, and air permeability can be ensured. On the other hand, in the overlap region R1, the number of laminated sheets by the leakage preventing sheet 55 and the leg circumference stretching portion 100 is changed. Compared with the portion having a large number of laminated sheets, a small portion is more likely to be elongated at the time of mounting, and wrinkles are smaller, so that the same wrinkle elongation state is not obtained, and leakage of excrement can be suppressed.

(4) Other embodiments

The above description of the present invention is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various forms, embodiments, and operational techniques are available in the alternative.

For example, the shape of the leg-surrounding and contracting portion 100 described above may be changed as follows. Fig. 5 is an enlarged plan view showing a leg-surrounding and contracting portion 100 according to a modified example of the present invention. As shown in Fig. 5, the end edge of the leg-surrounding and contracting portion 100 of the present modification in the width direction of the product is serpentine in the longitudinal direction L of the product. With In the body, by forming the bending points P1 to P5 in the leg-surrounding and contracting portion 100, the end edge of the leg-surrounding portion 100 in the product width direction W is serpentine. Therefore, the end edge of the leg-surrounding and contracting portion 100 in the product width direction is a concavity and convexity in the product width direction W with respect to the curve S1 of the leg circumference of the wearer along the disposable disposable diaper 10.

More specifically, the end edge of the leg-surrounding portion 100 in the product width direction W and the distance from the center line CL (see FIG. 1) of the straight line passing through the center of the product width direction W in the longitudinal direction of the product (distance d1) And d2) the more the front waistline portion 20 changes toward the rear waistline portion 30. The distance is changed from an increase to a decrease in the number of turning points (bending points P2, P4); the distance from the decrease to the increased turning point (bending points P1, P3, P5) is set separately. .

The amplitude A of the product width direction W formed in the meandering portion of the leg-surrounding portion 100 is preferably 2.5 mm or more and 20 mm or less. The amplitude A is a bending point when the predetermined bending point (for example, the bending point P4) is used as a reference; and two bending points orthogonal to the bending point (for example, the bending point P3) , the straight line of P5) and the distance passing through the position of the turning point (P4). Further, the starting point of the amplitude of the convex portion 110 is the position of the intersection of the center of the longitudinal direction L of the target strip 65 and the edge of the side flap 70 (E1 shown in FIGS. 1 and 2), and the amplitude of the convex portion 120. The starting point is the position of the base end of the crotch belt 90 on the crotch lower portion 25 side (E2 shown in Figs. 1 and 2).

Further, the amplitude A is the distance between the bent point and the position measured after the disposable disposable diaper 10 is unfolded. amplitude When A is less than 2.5 mm, the uneven portion of the leg-surrounding portion 100 cannot be sufficiently formed, and the pressure on the skin when the disposable disposable diaper 10 is worn is not easily alleviated. Further, when the amplitude A exceeds 20 mm, the leg-surrounding-and-expanding portion 100 is likely to be caught between the wearer's body and the disposable disposable diaper 10 due to the action of the wearer, and the uneven portions cannot be visualized. The function. Further, the unevenness is excessively conspicuous, and the visual impression of the leg circumference when the disposable disposable diaper 10 is installed is deteriorated.

The unfolded state refers to the state of the disposable disposable diaper 10 as shown in Fig. 1 . Specifically, the portion of the wrinkles formed by the expansion and contraction of the elastic element is stretched to such a state that it is held on a flat table to the extent that it does not wrinkle visually.

Further, the amplitude A can be confirmed by removing only the non-stretchable member forming the leg portion from the main body of the disposable disposable diaper 10 (in the present embodiment, the non-woven fabric forming the side top or the back sheet).

At the front end and the rear end of the leg-surrounding recess 35, convex portions 110 and 120 which are convex toward the outer side in the product width direction W from the other portions of the leg-surrounding recess 35 are formed.

The convex portion 130 and the concave portion 140 formed in the crotch portion 25 must be along the wearer's body in addition to alleviating the pressure on the skin. On the other hand, the position near the front end and the rear end of the leg-surrounding recess 35 is necessary to alleviate the pressure on the skin. Here, in the shape of the cost embodiment, the load applied to the leg-surrounding portion 100 by the action of the wearer can be reduced, and the pressure on the skin can be prevented from being concentrated on a specific portion.

The recess 125 is a curve along the leg circumference of the wearer. Since the form of S1 is concave toward the center side in the width direction W of the product, it is easy to follow the groin portion of the wearer. Since the stretch sheet 200 is more closely attached to the wearer, the crotch portion 25 is stably passed along the body from the front waist portion 20 of the disposable disposable diaper 10 without being affected by the action of the wearer. For example, even when the width of the absorbent body 40 is narrowed by the action of the wearer's legs, the concave portion 125 can continue to be attached to the groin portion, and the width of the absorbent body 40 does not become narrow. Can maintain a wide state. Therefore, it is preferable to have a concave portion such as the concave portion 125 closer to the front waistline portion 20 than the center of the product longitudinal direction L of the disposable disposable diaper 10.

The convex portion 130 is formed at a position corresponding to the lower portion of the wearer's crotch. Since the crotch portion 25 is sandwiched between the wearer's leg hole and the leg hole, and the distance between the left and right leg holes is also a narrow region, the leg circumference expansion and contraction portion 100 is sandwiched between the absorbent body 15 and the wearer. Between the body of the person, it is a portion that easily enters the inside of the disposable disposable diaper 10. Therefore, it is desirable that the leg-surrounding elastic portion 100 covers the body more broadly, and the convex portion 130 can more reliably prevent the excretion from leaking from the absorbent body 15. Further, as described above, the concave portion 125 is attached to the squirrel portion, and the entry of the convex portion 130 is further suppressed.

The recessed portion 140 and the recessed portion 160 are formed in the vicinity of the rear waistline portion 30 more than the center of the product longitudinal direction L of the disposable disposable diaper 10. A convex portion 150 is formed between the concave portion 140 and the concave portion 160. That is, the concave portion 140 and the concave portion 160 are formed at a predetermined distance in the longitudinal direction L of the product. Such a shape prevents the use of the buckle 90 to attach the disposable disposable diaper 10 to the wearer's body, and the leg circumference expansion portion 100 (or large The leg side flaps 80) are caught in the wearer's body and are not installed in a state in which the front waist region (abdomen) is not covered.

The recessed portion 140 is formed so as not to be caught in a narrow crotch portion when the wearer's buttocks abut against the abdomen through the crotch portion. Further, in order to prevent the buckle 90 existing on the side portion of the back waistline portion 30 from being locked to the target tape piece 65, the leg circumference expansion-contraction portion 100 on the back waistline portion 30 side is caught on the wearer's body. There is no way to get stuck in the correct position; and the leg-surrounding elastic portion 100 on the side of the rear waistline portion 30 is formed by protrudingly attaching the buckle 90 from the buckle. When the leg circumference expansion-contraction part 100 is stuck in the wearer's body, and the protrusion is attached, since the action of the wearer's leg exerts a force in the direction in which the disposable disposable diaper 10 is downwardly displaced after use, That is, the use of the buckle 90 to hold the disposable disposable diaper 10 in the waistline is also likely to cause a deviation, which is not preferable.

The convex portion 150 is formed to relieve the pressure on the skin mainly from the position corresponding to the wearer's buttocks to the position corresponding to the back surface, together with the adjacent concave portion 140 and the concave portion 160. Further, since the convex portion 150 covers the wearer's buttocks in a wide range, the appearance is improved, and the leakage of the excrement can be given by covering the body in a wide range, and the positional deviation of the disposable disposable diaper 10 is less likely to occur. The sense of security.

Further, in the above-described embodiment, as shown in FIG. 3, the stretchable sheet 200 constituting the leg-surrounding and contracting portion 100 extends to the outer end portion in the product width direction W, and the stretchable sheet may be considered in view of ease of manufacture. It is also not necessary for the 200 to extend to the end of the outer side in the width direction W of the product. That is, the product of the stretch sheet 200 is wider than the width W. The end portion of the side may be positioned further inside the product width direction W than the end portion of the back sheet 60, the thigh side flap 80, and the like in the product width direction W. Further, at this time, the distance between the outer end portion of the stretch sheet 200 in the product width direction W and the end portion of the back sheet 60, the thigh side flap 80, and the like in the product width direction W is preferably 7 mm or less.

Further, in the above-described embodiment, the unfolded disposable diaper provided with the buckle type 90 is described as an example, but the present invention is also applicable to the pants-type disposable diaper.

As described above, the present invention naturally includes various embodiments and the like which are not described herein. Therefore, the technical scope of the present invention is determined only by the specific matters of the invention from the scope of the patent application described above.

In addition, the entire contents of Japanese Patent Application No. 2012-104179 (filed on Apr. 27, 2012) are incorporated in the present specification by reference.

[Industrial availability]

A disposable disposable diaper can be provided which can prevent leakage of excrement from the vicinity of the lower part of the crotch and further enhance the comfort of the wearer.

20‧‧‧ front waist circumference

25‧‧‧ Lower part

30‧‧‧After waist circumference

35‧‧‧ leg circumference recess

55‧‧‧ leakproof sheets

100‧‧‧ leg circumference expansion and contraction

110‧‧‧ convex

200‧‧‧Flexible sheets

R1‧‧‧repetition area

R2‧‧‧non-repeating area

Claims (5)

A disposable disposable diaper having a front waist portion, a rear waist portion, and a crotch portion, and comprising: an elongated absorbent body including a liquid retaining absorbent body; and an absorbent body disposed on the absorbent body a side-by-side flank of the side edge portion of the product in the wide direction, and a disposable diaper having a leg-recessed portion recessed toward the center of the product in the width direction of the absorbent body in the side flap, which is provided with: The absorbent body is further provided with a liquid-impermeable leakage preventing sheet on the non-skin contact surface side; and a side end portion provided in the wide direction of the product of the side flap, in a region where the leg circumference concave portion is formed, a pair of leg-surrounding and contracting portions extending in the longitudinal direction of the product and at least partially extending along the longitudinal direction of the product, wherein the leakage preventing sheet has a front and rear stretchable portion of the discarded disposable diaper a superimposed overlap region; and a non-repetitive region on the outer side in the longitudinal direction of the product in the repeating region, and the overlap region is the leg stretch portion The narrowest part of the distance between the one side and the other side of the leg-surrounding portion in the product width direction is formed in the center portion of the disposable diaper in the longitudinal direction of the product, and the more toward the article The narrower outer side becomes narrower, and the non-overlapping region is outside the product in the longitudinal direction of the overlapping region, and is a product width direction between one of the leg-surrounding and contracting portions and the other of the leg-surrounding and contracting portions. The distance is formed more than the aforementioned repeating area The wide part. The disposable disposable diaper according to the first aspect of the invention, wherein the leg-surrounding and contracting portion is formed by a sheet-like elastic member and extends to an end portion of the leg-surrounded portion in a longitudinal direction of the product. The repeating region is disposed on the inner side of the end portion of the leg-surrounding portion in the longitudinal direction of the product. The disposable disposable diaper according to the first or second aspect of the invention, wherein the leg-surrounding and contracting portion is a pair of non-stretchable sheets and a pair of non-stretchable sheets The elastic elements that are clamped are formed, and are disposed in an elongated state in the longitudinal direction of the product. The disposable diaper according to claim 1 or 2, wherein the end edge of the product of the leg-surrounding portion in the width direction is serpentine in the longitudinal direction of the product. The disposable diaper according to claim 4, wherein the end edge of the product of the leg-surrounding and contracting portion in the width direction and the center of the product in the width direction of the disposable diaper The distance from the straight line parallel to the longitudinal direction of the product changes from the front waist portion toward the rear waist portion, and the convex portion formed by the change in the distance is provided at least in the lower portion of the crotch.