TWI651080B - Disposable disposable diaper - Google Patents

Abstract

The disposable disposable diaper (10) has a waist elasticized portion (85) disposed between a pair of fastening tapes. The waist stretchable portion (85) extends from the center in the width direction of the disposable disposable diaper to both outer sides in the width direction. The waist stretchable portion (85) has a first field (851) extending inward in the width direction from both outer edges of the waist elasticized portion, and a second field (852) extending from the inner edge of the first field to the width The inner side of the direction extends to have an elongation lower than that of the first field, and the third field (853) extends from the inner side of the second field toward the inner side in the width direction, and has an elongation higher than that of the second field. At least a part of the first field is located on the outer side in the width direction of the absorbent core material.

Description

Disposable disposable diaper

The present invention relates to disposable diapers.

Previously, a disposable disposable diaper which can maintain the fit of the wearer's waistline is well known. The disposable disposable diaper of Patent Document 1 is a waistband of a wearer and has a plurality of stretchable regions that expand and contract in the width direction. The field of expansion and contraction is provided between a pair of buckles, and is spaced apart in the width direction and is plurally set. The complex stretching field is configured to have different elongation rates.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2007-530166

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

The disposable disposable diaper of Patent Document 1 is disposed such that the stretching and contracting regions are spaced apart in the width direction, so that adjacent stretching regions do not interlock with each other. Therefore, each of the expansion and contraction fields is independently contracted, and the disposable disposable diaper is suitablely attached to the entire waistline.

Accordingly, the present invention has been made in view of the above problems, and it is an object of the invention to provide a disposable disposable diaper of the adhesive type which can improve the fit of the waist.

The disposable disposable diaper (the disposable disposable diaper 10) according to the present disclosure has the following tense: a front waist area (front waist area 20), a back waist area (back waist area 30), and The lower part of the forefoot area and the lower part of the waist area (the lower part of the field); has the long axis direction (long axis direction L) of the waist area from the front waist area and the long axis direction of the front Orthogonal width direction (width direction W); having: a pair of buckles (straps 90) extending in the front waist width region along the front width direction, and being fixed in the front waist front region; and the absorbent core The material (absorbent core material 40a) extends across at least one of the front front waist region and the front waist region; and the waist elastic portion (waist stretch portion 85) is disposed in the front pair of buckles And stretched in the width direction of the front note; the disposable disposable diaper is the front waist stretchable portion, which extends from the center of the width direction of the disposable diaper to the outer side in the width direction; The expansion and contraction system has: the first field (the first field 851), which is from the front waist extension Two outer edge portions to the width The second aspect (the second field 852) extends from the inner edge of the first field to the inner side in the width direction, and has an elongation lower than that of the first field; and the third field ( The third field 853) extends from the inner side of the second field to the inner side in the width direction, and has an elongation higher than that of the second field described above; at least a part of the first field is located at the width of the absorbent core material. Outside the direction.

According to the present disclosure, it is possible to provide a disposable disposable diaper of the adhesive type which can improve the fit of the waist.

10‧‧‧Disposable disposable diapers

20‧‧‧front waist area

25‧‧‧Sub-domain

30‧‧‧Back waist area

35‧‧‧ leg opening

40‧‧‧ absorber

40a‧‧‧Absorbing core material

40b‧‧‧ core cladding

50‧‧‧Top sheet

60‧‧‧Outer sheets

60a‧‧‧After sheet

70‧‧‧ side flaps

75‧‧‧ leg extension

80‧‧‧ Leg side expansion and contraction

85‧‧‧Waist expansion and contraction

85WO‧‧‧ outer edge

851‧‧‧1st field

851WI‧‧‧ inside edge

852‧‧‧2nd field

852WO‧‧‧ outer edge

852WI‧‧‧ inside edge

853‧‧‧3rd field

853WO‧‧‧ outer edge

90‧‧‧ buckle

91‧‧‧Substrate sheet

92‧‧‧ hook sheet

110‧‧‧Low basis weight field

115‧‧‧1st gap

125‧‧‧2nd gap

200‧‧‧Under the expansion and contraction department

CR‧‧‧ recessed parts

L‧‧‧ long axis direction

W‧‧‧Width direction

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

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

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

Fig. 4 is a schematic illustration of the appearance of the disposable disposable diaper of the present embodiment for the wearer. Fig. 4(a) is a state in which the buckle is fixed to the front waist region and the wearer is in a lying state, and Fig. 4(b) is a state in which the buckle is fixed to the front waist region and the wearer is in a state of getting up.

Next, an embodiment of the disposable disposable diaper 10 according to the present invention will be described with reference to the drawings. In the description of the following drawings, the same or similar parts are denoted by the same or similar symbols. However, the drawings are only schematic, and the ratios of the dimensions are different from the real ones. Please pay attention to this.

Therefore, the specific dimensions and the like must be judged by referring to the following description. Moreover, the drawings may also include portions having different dimensional relationships or ratios from each other.

(1) Overall outline of the disposable disposable diaper

Fig. 1 is a developed plan view of the disposable disposable diaper 10 according to the embodiment. Figure 2 is a cross-sectional view of the disposable disposable diaper taken along the line F1-F1 shown in Figure 1. Figure 3 is a cross-sectional view of the disposable disposable diaper taken along the line F2-F2 shown in Figure 1. In the developed view shown in Fig. 1, the elastic members of the leg stretch portion 75 and the leg side stretch portion 80 are elongated until the top sheet 50, the side flaps 70, and the like which constitute the disposable disposable diaper do not wrinkle. A diagram of the state until the pleats.

The disposable disposable diaper 10 has a front waist area 20, a lower femoral field 25, and a back waist area 30. The front waist region 20 is a portion that comes into contact with the front waist circumference (abdomen portion) of the wearer. Further, the back waist area 30 is a portion that comes into contact with the wearer's rear waist portion (back portion). The lower sub-region 25 is located between the front waist region 20 and the back waist region 30.

Moreover, the disposable diaper 10 is formed with a pair of legs after use. Opening 35. The leg opening portion 35 is provided at the side end portion in the width direction of the disposable disposable diaper, in a state in which the disposable disposable diaper is worn by the wearer, along the wearer's The part that is arranged around the foot.

Further, in the present embodiment, the direction from the front waist region 20 to the rear waist region 30 is referred to as the longitudinal direction L, and the direction orthogonal to the longitudinal direction L is referred to as the width direction W.

The disposable disposable diaper 10 has an absorbent body 40. The absorber 40 has an absorbent core 40a and a core cladding 40b. The absorbent core material 40a extends across the sub-femoral region 25 and extends from at least one of the front lower waist region 20 and the back waist region 30.

The absorbent core member 40a can be suitably formed using a known member or material, similarly to the conventional disposable disposable diaper, using a pulverized pulp or a superabsorbent polymer. The absorbent core material 40a is surrounded by a sheet-like core cladding 40b. The core cladding 40b is a sheet which covers the core material 40a. The rear end edge of the absorbent core material and the rear end edge of the core cladding layer are substantially identical. More specifically, the distance between the rear end edge of the absorbent core material and the rear end edge of the core cladding layer is 5 mm or less.

The absorbent core 40a is formed such that the basis weight of the absorbent material is lower than the lower basis weight region 110 of the other portion of the absorbent core 40a. The low basis weight region 110 is located at the center in the width direction of the rear end edge of the absorbent core member 40a. The width of the low basis weight region 110 in the width direction W is larger as it goes toward the rear end edge of the absorbent core 40a. More specifically, the low basis weight field 110 is wedge shaped in the planar projection of the disposable disposable diaper 10.

The liquid permeable top sheet 50 is provided on the surface side (the skin facing surface side) of the absorber 40. Moreover, the back surface side (non-skin opposing surface side) of the absorber 40 is provided with the liquid-permeable back sheet 60a. An exterior sheet 60 is provided on the back side of the rear sheet 60a.

The outer edge (the outer end in the width direction) of the absorber 40 is provided with a side flap 70, respectively. The side flaps 70 span the front waist region 20, the lower femoral region 25, and the back waist region 30, and are disposed on the outer side of the absorbent body 40 in the width direction. The side flaps 70 are composed of one or two or more sheets of non-woven fabrics that are overlapped. The side flaps 70 are located on the opposite side of the skin than the absorbent core material, and extend outward in the width direction from the absorbent core material.

The side flap 70 is provided with a pair of leg expansion-contraction portions 75 that are disposed on the inner side in the width direction of the leg opening portion 35 and that can expand and contract in the longitudinal direction L. The leg expansion and contraction portion 75 is configured to be expandable and contractible in the longitudinal direction of the leg opening portion 35, and may be disposed along the leg opening portion 35, or may be disposed in a state in which the leg opening portion 35 is inclined. .

Further, a pair of leg side stretchable portions 80 extending in the longitudinal direction L are provided inside the pair of leg stretchable portions 75 in the width direction. The leg side stretchable portion 80 is provided at the inner end portion of the side flap 70 in the width direction, and is a standing stretch pleat.

Further, the disposable disposable diaper 10 is provided with a crotch expansion-contraction portion 200 disposed in a field in which the absorbent body is overlapped in the lower femoral region 25. The underarm elasticizing portion 200 is configured to be in a portion of the lower femoral region 25 when the disposable diaper is worn by the other portion of the absorbent body 40. Maintain a flat shape. The armpit expansion/contraction unit 200 is configured to expand and contract at least in the longitudinal direction L or the width direction W.

The first notch 115 and the second notch 125 are formed in the absorbent core material 40a in the lower femoral region. The first notch 115 and the second notch 125 are cracks formed in the absorber 40. The crack is a portion where there is no absorbent material. The first notch 115 and the second notch 125 are formed in a notch shape extending from the outer side edge of the absorbent core member 40a toward the inner side in the width direction.

The buckles 90 are a pair and extend in the width direction W in the back waist region 30 and are fixed to the non-skin opposing surface of the front waist region 20, thereby disposing the disposable disposable diaper 10 Keep on the wearer's body. The buckle 90 is mounted in the field of the side flaps 70 corresponding to the back waist region 30. The buckle 90 includes a base sheet 91 that is coupled to the side flaps 70, and a hook sheet 92 that is provided with a hook (not shown) as a plurality of engaging members, and is fixed to the base sheet 91. . The hook sheet 92 is a field in which the engaging members are provided.

The target portion 95 is a surface on the non-skin opposite side of the outer sheet 60 of the front waist region. The target portion 95 is configured to be hooked by the engaging hook of the buckle, and functions as a loop of the hook and loop engagement system. As the target part, for example, an air laid non-woven fabric can be used. Further, the disposable disposable diaper may be constructed so as not to have the target portion, but to fix the buckle 90 to the sheet 60 outside the front waist region.

Further, a waist elasticized portion 85 that can expand and contract in the width direction is provided between the pair of fastening tapes 90 in the width direction. Waist circumference expansion and contraction 85, the buckle belt 90 shrinks in the width direction.

In the present embodiment, the waist elastic-contraction portion 85 is composed of a stretchable sheet. In addition, the waist elastic-contraction part 85 is a part which expands and expands in the width direction substantially, and the part which arrange|positions the elastic sheet is excluded in the state which does not exhibit the expansion-contraction force. Therefore, the outer side edge of the waist stretchable portion to be described later is not the outer side edge of the stretch sheet, but the outer edge of the portion that expands and contracts.

In the embodiment of the present invention, as the waist elastic-contraction portion 85, a stretchable film having a basis weight of 20 to 45 g/m ² is used. However, the waist elastic-contraction portion 85 may be configured by other configurations such as a plurality of rubber threads. The waist elastic-contraction portion 85 is stretched by a predetermined magnification with respect to the length in the non-elongated state (natural state), and is then attached to the exterior sheet 60 by a hot-melt adhesive or heat treatment.

The waist elastic-contraction portion 85 is composed of a continuous sheet extending in the width direction from the center of the width direction of the disposable disposable diaper in the width direction. The rear end edge of the waist elastic portion 85 is located on the front side of the rear end edge of the disposable disposable diaper. Further, the rear end edge of the waist elastic portion 85 may coincide with the rear end edge of the disposable disposable diaper. Further, the front end edge of the waist stretchable portion 85 is located on the front side of the rear end edge of the absorbent core member 40a, and is further forward than the rear end edge of the core wrap 40b, and is rearward than the rear end portion of the leg elastic portion 75. The edge is still on the back side. Therefore, at least a part of the waist stretchable portion 85 is superposed on the absorbent core member 40a in the plane projection of the disposable disposable diaper. Moreover, the waist elasticized portion 85 spans the rear end edge of the absorbent core material and the rear end edge of the core cladding layer, and the rear end of the absorbent core material The edge of the edge and the back edge of the core cladding are also extended to the rear side.

The outer edge 85WO of the waist elasticized portion 85 is located on the inner side in the width direction of the inner edge (the inner end in the width direction) of the buckle. The waist elasticized portion 85 and the buckle belt 90 are separated from each other in the width direction.

The waist elastic-contracting portion has a first field 851 extending inward in the width direction from both outer edges 85WO of the waist elastic-contracting portion, and a second field 852 extending inward in the width direction from the inner edge 851 WI of the first field 851; The third field 853 extends from the inner side edge 852WI of the second field 852 to the inner side in the width direction.

The first field 851, the second field 852, and the third field 853 are connected in the width direction. Therefore, between the first field 851 and the second field 852, and between the second field 852 and the third field 853, there is no non-stretching field that does not expand and contract in the width direction. Further, the inner edge 851WI of the first field 851 coincides with the outer edge 852WO of the second field 852, and the inner edge 852WI of the second field 852 coincides with the outer edge 853WO of the third field 853.

The first field 851, the second field 852, and the third field 853 are configured such that the elongation in the width direction is different. In detail, the elongation in the width direction of the second field 852 is lower than the elongation in the width direction of the first field 851. Further, the elongation in the width direction of the third field 853 is higher than the elongation in the width direction of the first field 851. Further, the relationship between the elongation in the width direction of the first field 851 and the elongation in the width direction of the third field 853 may be the same or may be higher. Ideally, the extension of the width direction of the third field 853 The rate is preferably higher than the elongation in the width direction of the first field 851.

The outer edge 851WO of the first field 851 is located on the outer side in the width direction of the outer edge of the absorbent core member 40a. The inner edge 851 WI of the first field 851 is located on the inner side in the width direction of the outer edge of the absorbent core material. Therefore, the first field is disposed across the outer edge of the absorbent core material. In addition, as long as at least a part of the first field is located outside the width direction of the absorbent core material, the inner edge of the first field may be located outside the width direction of the outer edge of the absorbent core material, or may be The inner edge of the 1 field coincides with the outer edge of the absorbent core.

The second field 852 is located between the first field 851 and the third field 853. The second field 852 is preferably disposed closer to the inner side in the width direction than the outer edge of the absorbent core member 40a. The third field 853 is disposed across the center of the width direction of the disposable disposable diaper. The third field 853 is ideal for planar projection and overlapping at least a portion of the low basis weight field.

Further, the waist elastic-contraction portion 85 of the present embodiment is symmetrical with respect to the center line extending in the longitudinal direction of the disposable diaper, and may be asymmetric. For example, both the right and left first fields 851 may span the outer edge of the absorbent core 40a, or the first field 851 may span the outer edge of the absorbent core 40a. Further, both the left and right second regions 852 may be disposed closer to the inner side than the outer edge of the absorbent core member 40a in the width direction, or one of the second regions 852 may be disposed on the specific absorbent core member 40a. The outer edge of the The inner side of the width direction. Moreover, the disposable disposable diaper of the present embodiment may be provided in a field having an elongation lower than that of the first field 851 in the outer side of the first field 851 closer to the width direction.

The waist elastic portion 85 is located closer to the non-skin opposing surface than the absorbent core 40a. In the present embodiment, the waist elastic-contraction portion 85 is disposed between the exterior sheet 60 and the rear sheet 60a. However, when the core clad layer 40b is configured to extend beyond the outer side in the longitudinal direction of the absorbent core member 40a, the waist elasticized portion 85 may be disposed on the core clad layer 40b, the rear sheet 60a, or the outer sheet 60. between. The position of the waist elasticized portion is not particularly limited. Further, in the field where the absorber is not disposed, it may be disposed between the side flaps 70 and the rear sheet 60a or the exterior sheet 60.

Further, the waist elastic-contracting portion according to the present embodiment is configured to expand and contract in the width direction, but may be configured such that the waist elastic-contraction portion expands and contracts in the width direction and the long-axis direction.

Further, the waist elasticized portion and the absorbent core member are joined by an adhesive. The adhesive for bonding the waist elastic-contraction portion 85 to the absorbent core member 40a is continuously arranged in a plurality of rows in the longitudinal direction, and the respective rows are arranged to overlap each other in the width direction. Specifically, the adhesive is arranged in a continuous spiral shape in the long axis direction and arranged in a plurality of rows, and the row is a structure that overlaps in the width direction, or has an amplitude in the width direction and a long axis direction. The plurality of columns are arranged in a continuous wave shape, and the columns are arranged to overlap in the width direction.

Further, in the present embodiment, the waist elastic-contraction portion 85 and the suction The core material 40a is not directly joined, but is indirectly joined via the rear sheet 60a and the core cladding 40b. The adhesive that surrounds the waist elasticized portion 85 and the rear sheet 60a, the adhesive that connects the rear sheet 60a and the core cladding 40b, and the adhesive that connects the core cladding 40b and the absorbent core 40a are long. It is preferable that a plurality of columns are continuously arranged in the axial direction, and each column is arranged to overlap in the width direction.

The term "elongation" as used herein means the degree of elongation and is measured by the following measurement method.

When the disposable disposable diaper 10 is sealed in a package or the like, the disposable disposable diaper 10 is taken out from the package. Next, the field of arrangement of the stretchable sheets constituting the waist elasticized portion is cut out, and a sample to be measured is prepared. The sample was placed in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 24 hours, and this state was regarded as the natural state of the stretchable sheet. In the natural state, between the end portion (front end portion) on the absorbent core side of the stretchable sheet and the end portion (rear end portion) on the waist opening side of the stretchable sheet, that is, in the long axis direction In the middle position, points (imprints) are intermittently marked along the width direction. In this point, the center of the width direction of the stretchable sheet is used as a reference, and the point (imprint) is marked all the way from the reference to the left and right in the width direction at intervals of 5 mm until the end portion in the sample width direction of the stretchable sheet. The distance between adjacent points is determined. Think of this distance as the length of the natural state. (Because the mark is marked at 5 mm intervals, it is 5 mm). Then, it is extended from a natural state until the wrinkles by an elastic member cannot be visually confirmed on the elastic sheet, and the distance between the previous stamps is measured at this time. Various parts The elongation (time) = (the distance between the marks in the extended state) / (the distance between the marks in the natural state), and the elongation is calculated by this formula.

(2) Manufacturing method of disposable disposable diaper

Next, an example of a method of producing an absorbent article according to the present embodiment will be described. Further, regarding the method not described in the embodiment, an existing method can be used. Moreover, the manufacturing method demonstrated below is an example, and it can manufacture by other manufacturing methods. The method for producing an absorbent article includes at least a component forming project, a component mounting project, a foot forming process, and a cutting process.

In the component forming process, the constituent parts constituting the absorbent article are formed. Specifically, for example, the absorbent material is laminated to shape the absorbent body 40, or the buckle tape 90 or the like is formed.

In the component mounting work, the web material constituting the rear sheet is placed on the stretch sheet constituting the waist stretch unit 85 or the other web material such as the web material constituting the top sheet, the leakage preventing sheet, and the absorber. The leg stretchable portion 75 and the like constitute a component of the disposable disposable diaper 10.

Moreover, as a method of changing the elongation rate of the waist elastic-contraction part 85, the following methods are mentioned, for example. Before the waist elastic-contraction portion 85 is bonded to the rear sheet 60a or the like, the waist elastic-contraction portion 85 is extended by the gear in the width direction. When the gear is extended, the gear extension in the field in which the elongation is lowered (for example, the second field) is weakened. The gear extension in areas where the elongation is increased (for example, the first field and the third field) is enhanced. The strength of the gear extension can be changed by changing the depth of the convex part of the gear The degree, the pitch of the convex portions of the gears, and the number of times the gears are extended can be adjusted. The elongation in the field which is strongly extended is relatively high, and the elongation in the field which is weakly extended becomes relatively low.

The foot forming process is to cut the top sheet 50, the outer sheet 60, and the rear sheet 60a. Thereby, the leg opening portion 35 disposed around the wearer's foot is formed.

In the cutting process, the continuum in which the top sheet 50, the rear sheet 60a, the absorber 40, and the like are disposed is cut into the size of one product in the width direction W. Thereby, the disposable disposable diaper 10 is manufactured.

(3) role. effect

Figure 4 schematically illustrates the wearer's appearance of the disposable disposable diaper. Fig. 4(a) is a state in which the buckle is fixed to the front waist region and the wearer is in a lying state, and Fig. 4(b) is a state in which the buckle is fixed to the front waist region and the wearer is in a state of getting up.

When the disposable diaper of the adhesive type is attached (when the buckle is fixed), the wearer's back is placed on the back waist of the disposable diaper, and the back waist is The buckle 90 of the field 30 is pulled to the front waist region 20, and the buckle 90 is fixed to the front waist region 20.

As shown in Fig. 4(a), when the buckle is fixed, the body pressure of the wearer is applied to the back waist region 30 of the disposable disposable diaper. In general, the wearer's body is placed so as to cover the entire width of the absorbent core 40a when it is attached. Therefore, pulling the buckle At the time of the belt 90, the pulling portion is located closer to the outer side in the width direction than the wearer's body, that is, a region closer to the outer side in the width direction than the absorbent core member 40a. For example, if the pulling portion of the buckle 90 is difficult to stretch, it is difficult to grasp the extent to which the fastener 90 should be stretched, and it is difficult to fix it in the correct position. However, since the first region 851 having a high elongation is disposed closer to the outer side than the absorbent core member 40a in the width direction, the assistant is attached to the first region 851 to fix the buckle 90. Since the first field 851 can be easily extended by the assistant, it is easy to grasp the range in which the first field 851 can be stretched. Therefore, the auxiliary system can be used to grasp the extension range of the buckle 90, and the buckle can be fixed in the correct position.

Further, when the buckle 90 is fixed, the first field 851 is disposed at a position corresponding to the waist bones on both sides of the wearer. On the other hand, when the fastening tape 90 is fixed, the second field 852 and the third field 853 are subjected to the body pressure of the wearer, and are in a state in which it is difficult to expand and contract. However, after the disposable disposable diaper is attached to the wearer, for example, in a state where the wearer gets up, the body pressure applied to the back waist region 30 of the disposable disposable diaper is reduced. . When the wearer's body pressure applied to the back waist area 30 is reduced, as shown in FIG. 4(b), the first field 851, the second field 852, and the third field 853 are interlocked, and the first field 851 is The base point, the second field 852 and the third field 853 will respectively expand and contract.

Specifically, the first field 851 is stretched when the buckle is attached compared to the second field 852 and the third field 853. In this state, if the second field 852 and the third field 853 respectively expand and contract, In the first field 851, the second field 852 having a low elongation rate is pulled toward the first field 851 side, and the third field 853 having a high elongation rate pulls the second field 852 toward the inner side in the width direction. The second field 852 will stretch. At this time, since the first field 851 is located close to the buckle, it is elongated when the buckle 90 is fixed to the target portion 95. At this time, the third field 853 which is difficult to extend is attached to the inner side of the second field 852 in the width direction, whereby the second field located at the position sandwiched by the first field 851 and the third field 853 is located. 852, it is easy to elongate in the width direction, and as a result, the second field 852 can be attached to the body evenly with a weak force without tightening the body of the baby.

By using the disposable disposable diaper in this manner, the waist bones on both sides of the wearer are stronger by the first field 851. Moreover, the waist bones on both sides of the wearer are on the back side, and the waist bones are less, and the wearer's body is softer. The portion with less waist bones is weaker in the second field 852. Since the wearer's body is stronger and the body is weaker, the wearer's body is weaker, so that the wearer's body is not close to the body, and the waist fit can be improved. . In other words, the original mother (caregiver) hopes that "I don't want to use a diaper to tighten the baby", and on the other hand, because I don't want to have a gap with the body, the excrement is leaked out, and the fit is enhanced (strongly tightened). Preferably, the contradiction between the two can be achieved by the constitution of the present invention.

The third field 853 is disposed across the width direction of the disposable disposable diaper 10. In the center of the wearer's back, there is a back bone, which is recessed toward the ventral side than the left and right parts. Depression The stalk is a depression of the tibia portion, and the third field 853 is disposed at the recessed portion. In Fig. 4(a), the recessed portion CR is illustrated. After the disposable diaper is used, the third field 853 contracts while the second field 852 is pulled while the body pressure is reduced. The contracted portion can be placed in the concave portion of the wearer. Therefore, it is possible to suppress a gap between the center of the wearer's back and the disposable disposable diaper, and the disposable disposable diaper 10 can be used to fit the entire waistline. In addition to this, after the rear end edge of the core material 40a is absorbed, since the difference in thickness of the absorbent core material 40a occurs, a gap is easily generated between the body and the disposable disposable paper diaper. However, the rear end edge of the waist elastic portion 85 extends beyond the rear end edge of the absorbent core 40a to the waist side, and since the elongation of the third field 853 is relatively high, the depression from the back side can be more reliably prevented. Leakage of the part.

The absorbent core member 40a is more rigid than other members (the top sheet 50) constituting the disposable disposable diaper, and thus is difficult to arrange along the body. However, since at least a part of the waist elastic-contraction portion 85 is overlapped with the absorbent core material 40a, and the waist elastic-contraction portion 85 is disposed on the non-skin opposing surface side of the absorbent core member 40a, the contraction of the waist elastic-contraction portion 85 allows absorption. The core material 40a is attached to the body.

When the third field 853 is disposed over the entire width direction of the absorbent core member 40a, the width of the absorbent core member 40a in the natural state is too short due to the contraction of the third region 853. As a result, the width of the disposable disposable diaper cannot be ensured when the buckle is fixed, and it is difficult for the assistant to grasp the buckle 90, which may cause deterioration of the mountability. However, by making the second collar The region 852 is located on the inner side in the width direction of the outer edge of the absorbent core member 40a, and the second region 852 and the third region 853 can be disposed in the entire width direction of the absorbent core member 40a. Therefore, the width of the absorbent core material 40a in the natural state is not too short, and the deterioration of the mountability can be suppressed.

The inner edge of the first field 851 is located on the inner side in the width direction of the outer edge of the absorbent core member 40a. When the buckle is pulled and attached, the assistant is attached, and the first field is extended to fix the buckle. Moreover, when the first field is stretched and the buckle is fixed, the absorbent core is placed under the wearer's body, and the body pressure is applied. Since the inner edge of the first field is disposed closer to the inner side in the width direction than the outer edge of the absorbent core member, the inner edge of the absorbent core member is difficult to be attached when the buckle is pulled and attached. A state of movement under the wearer's body. Therefore, when the inner edge of the first field 851 is located closer to the inner side than the outer edge of the absorbent core member 40a in the width direction, the inner edge of the first field 851 can be used as the base point when the fastening tape is pulled. It is easy to lengthen the first field 851.

The adhesive agent that surrounds the waist elastic-contraction portion 85 and the absorbent core member 40a may be continuously arranged in a plurality of rows in the longitudinal direction, and the respective rows are arranged to overlap each other in the width direction. The waist elasticized portion and the absorbent core member can be continuously continuous in the longitudinal direction and the width direction, and the waist elasticized portion can be prevented from floating from the absorbent core material.

The elongation in the width direction of the third field 853 may be higher than the elongation in the width direction of the first field 851. By making the elongation of the third field 853 higher than the elongation of the first field 851, After the buckle is fixed, the second field 852 is pulled toward the third field 853 while the body pressure applied to the back waist area is reduced. Therefore, the portion that is contracted by the third field is concentrated in the depression behind the wearer.

The third field 853 is associated with at least a portion of the low basis weight field in the planar projection. In the third field, the low basis weight region is contracted in the width direction, and the rear end edge of the absorbent core member is deformed toward the center side in the width direction. The rear portion of the absorbent core can be formed into a cup shape. By the cup-shaped absorbent core material, the wearer's buttocks can be covered, and the waist fit can be further improved.

The rear end edge of the absorbent core 40a and the rear end edge of the core cladding 40b are substantially identical, and the waist elastic portion 85 is further rearward than the rear end edge of the absorbent core 40a and the rear end edge of the core cladding 40b. Extend. For example, once the core clad layer 40b extends further rearward than the absorbent core material 40a, the stretchability of the waist elasticized portion 85 may be hindered by the core clad layer 40b. However, since the waist elastic portion 85 extends rearward beyond the rear end edge of the absorbent core 40a and the rear end edge of the core cladding 40b, the rear end edge of the absorbent core material and the rear end of the core cladding layer At the rear of the edge, the core cladding or the like does not hinder the expansion and contraction of the waist elastic portion 85.

Further, in the rear end edge of the disposable disposable diaper, the waist elasticized portion 85 is not disposed, and the side flaps of the rear end edge of the disposable disposable diaper are inside and long in the width direction. A concave notch is formed on the inner side in the axial direction. More specifically, the rear end edge of the side flap is long in a certain range extending from the outer edge of the side flap to the inner side in the width direction. The inside of the axis is recessed. In other words, the outer edge of the side flap is recessed toward the inner side in the width direction within a certain range extending from the rear end edge of the side flap to the inner side in the long axis direction. By forming the rear end edge of the disposable disposable diaper in this manner, it is possible to suppress the warpage of the rear end edge of the disposable disposable diaper, and it is possible to more reliably cover the waist circumference of the wearer.

As described above, the disclosure of the present invention is not intended to limit the scope of the present invention. Various alternative embodiments, embodiments, and techniques of operation will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is determined only by the specific matters of the invention described in the scope of the patent application described above.

In addition, the entire content of the Japanese Patent Application No. 2014-214860 (filed on October 21, 2014) is incorporated herein by reference.

[Possibility of industrial use]

A disposable disposable diaper of the adhesive type which can improve the fit of the waistline can be provided.

Claims (10)

A disposable disposable diaper having a front waist area, a back waist area, a sub-femoral field located between the front waist circumference and the front waist area; and having: a front waist circumference area and a back waist area a long axis direction and a width direction orthogonal to the long axis direction; and a pair of buckles extending in the front waist width region along the front width direction and fixed in the front waist front region; and the absorbent core The material extends across at least one of the front waist region and the front waist region; and the waist elastic portion is disposed between the pair of buckles and stretches in the width direction of the front; The disposable disposable diaper is a front waist stretchable portion which extends from the center of the width direction of the disposable diaper in the width direction to the outside of the width direction; the front waist stretchable portion has the first field, the The both outer edges of the waist-elastic expansion-contraction portion extend inward in the width direction; and the second field extends from the inner edge of the first field to the inner side in the width direction, and has an elongation lower than that of the first field; In the third field, the inner edge of the second field extends from the inner side in the width direction to the inner side in the width direction, and has an elongation higher than that of the second field. The second field is configured to be more elongated than the third field, and at least the first field is Part of which is located in the pre-recorded absorbent core Outside the width direction. The disposable disposable diaper according to claim 1, wherein the third field is disposed so as to span the center of the width direction of the disposable disposable diaper. The disposable disposable diaper according to claim 1 or claim 2, wherein at least a part of the front waist stretchable portion is in a plane projection of the disposable disposable diaper, and is superimposed on the front absorbent core material. The front waistline expansion and contraction section is located closer to the non-skin contrast side than the previous absorbent core material. The disposable diaper according to claim 1 or claim 2, wherein the second field is located closer to the inner side in the width direction than the outer edge of the absorbent core member. The disposable diaper according to claim 1 or claim 2, wherein the inner edge of the first field is located closer to the inner side in the width direction than the outer edge of the absorbent core member. The disposable disposable diaper according to claim 1 or claim 2, wherein the waist waist stretchable portion and the front absorbent core member are joined by an adhesive; the adhesive is preceded by a long axis direction The plurality of columns are continuously arranged, and the columns are arranged to overlap in the width direction. A disposable diaper according to claim 2, wherein the elongation in the width direction of the third field is the first field in the first field. The elongation of the pre-width direction is also high. The disposable disposable diaper according to claim 1 or claim 2, wherein the center of the trailing edge width of the front end edge of the absorbent core member is formed, and the basis weight of the absorbent material is higher than that of the absorbent core The other parts of the material are also low in the low basis weight field; the third field in the previous section is in the plane projection, overlapping at least a portion of the low basis weight field. The disposable disposable diaper according to claim 1 or claim 2, further comprising: a core cladding layer covering the front absorbent core material; and a front end edge of the absorbent core material and the front core cladding layer The rear end edge is substantially identical; the front waist expansion and contraction portion is extended to the rear side than the rear end edge of the front absorbent core material and the rear end edge of the front core wrap. The disposable disposable diaper according to claim 1 or claim 2, which has a side flap which is located closer to the opposite side of the skin than the absorbent core material of the foregoing, and which is more than the absorbent core material. The front end of the front side flap is extended in a certain range extending from the outer side edge of the front side flap to the inner side in the width direction, and the long axis direction is forwardd. The inside is recessed.