JP5956003B1 - Disposable diapers - Google Patents

Abstract

Disclosed is a tape-type disposable diaper that can improve the fit around a waist of a wearer. In a disposable diaper according to the present invention, a center line O in a longitudinal direction L of a pair of fastening tapes 90 overlaps with a waist elastic part 85 and does not overlap an absorber 40 in a plan view of the disposable diaper 10. The length W1 in the width direction W of the waist elastic unit 85 is configured to be longer than the length W2 in the width direction W of the absorber 40. The stretch rate of the region A located outside the width direction W with respect to the absorber 40 is configured to be different from the stretch rate of the region B located inside the width direction W with respect to the absorber 40 in the waist stretchable portion 85. Has been. [Selection] Figure 1

Description

  The present invention relates to a disposable diaper.

  2. Description of the Related Art Conventionally, in a tape-type disposable diaper, in order to maintain good fit around a wearer's waist, a technique is known in which a waistline stretchable portion that stretches in the width direction around the wearer's waist is known.

JP-A-10-225481

  However, in the above-mentioned conventional disposable diapers, since the expansion and contraction of the waist stretchable part is hindered by the rigidity of the absorbent body, the disposable diaper cannot be firmly fitted to the wearer's waist circumference and worn. There was a problem of inducing leakage of excrement from the back of the person.

  Then, this invention is made | formed in view of the above-mentioned subject, and it aims at providing the tape-type disposable diaper which can improve the fit property of a wearer's waist circumference.

  A first feature of the present invention includes a front waistline region, a back waistline region, and a crotch region positioned between the front waistline region and the back waistline region, and the front waistline region A pair extending in the width direction in the rear waist region and fastened to the front waist region. Fastening tape, an absorbent body straddling the crotch region and extending toward at least one of the front waistline region and the rear waistline region, and a waist circumference that is disposed between the pair of fastening tapes and expands and contracts in the width direction A disposable diaper having a stretchable part, wherein the longitudinal center line of the pair of fastening tapes overlaps with the waist stretchable part in a plan view of the disposable diaper and does not overlap the absorbent body And said waist The length of the stretchable portion in the width direction is configured to be longer than the length of the absorbent body in the width direction, and the waist stretchable portion is positioned outside the absorbent body in the width direction. The gist is that the stretch rate of the region to be configured is different from the stretch rate of the region located on the inner side in the width direction than the absorbent body in the waist elastic part.

  ADVANTAGE OF THE INVENTION According to this invention, the tape-type disposable diaper which can improve the fit property of a wearer's waist circumference can be provided.

It is an expanded top view of the disposable diaper concerning this embodiment. It is sectional drawing of the disposable diaper along the F1-F1 line | wire shown in FIG. It is sectional drawing of the disposable diaper along the F2-F2 line shown in FIG. It is a figure which shows typically the mounting | wearing aspect to the wearer of the disposable diaper which concerns on this embodiment. FIG. 4 (a) shows a state where the fastening tape is fastened to the front waist area and the wearer is sleeping. FIG. 4 (b) shows a fastening tape fastened to the front waist area and the wearer. Is happening.

  Next, an embodiment of the disposable diaper 10 according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) Overall schematic configuration of disposable diaper FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the disposable diaper along the line F1-F1 shown in FIG. FIG. 3 is a cross-sectional view of the disposable diaper along the line F2-F2 shown in FIG. The developed view shown in FIG. 1 is a diagram showing a state in which the elastic members of the leg stretchable part 75 and the leg side stretchable part 80 are stretched until the top sheets 50 and the side flaps 70 constituting the disposable diaper are not formed. is there.

  As shown in FIG. 1, the disposable diaper 10 has a front waistline region 20, a crotch region 25, and a back waistline region 30. The front waistline region 20 is a part in contact with the wearer's front waistline part (abdominal part). Moreover, the back waist area 30 is a part which contact | connects a wearer's back waist part (back). The crotch region 25 is located between the front waistline region 20 and the back waistline region 30.

  The disposable diaper 10 has a pair of leg openings 35 formed therein. The leg opening 35 is provided at the outer edge (outer end in the width direction W) of the disposable diaper 10 and is disposed around the leg of the wearer in a state where the disposable diaper 10 is worn by the wearer. Part.

  In the present embodiment, in the disposable diaper 10, a direction from the front waistline region 20 to the back waistline region 30 is referred to as a longitudinal direction L, and a direction orthogonal to the longitudinal direction L is referred to as a width direction W.

  The disposable diaper 10 has an absorber 40. The absorber 40 has the absorption core 40a and the core wrap 40b. The absorbent core 40 a extends over the crotch region 25 and extends from the crotch region 25 toward at least one of the front waistline region 20 and the back waistline region 30.

  The absorbent core 40a is the same as a conventional disposable diaper, and can be appropriately configured using a known member or material such as pulverized pulp or a superabsorbent polymer. The absorption core 40a is wrapped with a sheet-like core wrap 40b. The core wrap 40b is a sheet that covers the absorbent core 40a. The rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b substantially coincide. More specifically, the distance between the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b is 5 mm or less.

  The absorbent core 40a is formed with a low basis weight region 110 in which the basis weight of the absorbent material is lower than other parts of the absorbent core 40a. The low weight area 110 is located at the center in the width direction W of the rear end edge of the absorbent core 40a. The width of the low weight area 110 in the width direction W becomes wider toward the rear end edge of the absorbent core 40a. More specifically, the low basis weight area 110 has a wedge shape in the plan view of the disposable diaper 10.

  As shown in FIGS. 2 and 3, a liquid-permeable top sheet 50 is provided on the surface side (skin facing surface side) of the absorber 40. In addition, a liquid-impermeable back sheet 60 a is provided on the back side (non-skin facing side) of the absorber 40. An exterior sheet 60 is provided on the back side of the back sheet 60a.

  As shown in FIGS. 1 and 2, side flaps 70 are respectively provided on the outer edges of the absorber 40. The side flaps 70 straddle the front waistline region 20, the crotch region 25, and the back waistline region 30, and are disposed outside the absorbent body 40 in the width direction W.

  The side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets. As shown in FIG. 2, the side flap 70 is located on the skin facing surface side with respect to the absorbent core 40a and extends outward in the width direction W with respect to the absorbent core 40a.

  As shown in FIG. 2, the inner edge of the side flap 70 (the inner end in the width direction W) covers the absorbent core 40a, and the outer edge of the side flap 70 is disposed outside the width direction W of the absorbent core 40a. The

  As shown in FIG. 1, the side flap 70 is provided with a pair of leg stretchable portions 75 that are disposed on the inner side in the width direction W than the leg opening 35 and can be stretched in the longitudinal direction L. The leg expansion / contraction part 75 should just be comprised so that the leg opening part 35 can be expanded-contracted in the longitudinal direction L, may be arrange | positioned along the leg opening part 35, and one part is with respect to the leg opening part 35. And may be arranged in an inclined state.

  Here, as shown in FIG. 1, the pair of leg stretchable portions 75 may be configured to spread outward in the width direction W toward the rear waistline region 30.

  Further, as shown in FIG. 1, a pair of leg side stretchable portions 80 extending along the longitudinal direction L are provided inside the pair of leg stretchable portions 75 in the width direction W. The leg side expansion / contraction part 80 is provided in the inner side edge part of the width direction W of the side flap 70, and is an erecting expansion / contraction gather.

  In addition, the disposable diaper 10 includes a crotch expansion / contraction part 200 disposed in a region overlapping the absorber 40 in the crotch region 25. The crotch stretchable part 200 is configured to maintain a flat shape in a part of the crotch region 25 when the disposable diaper 10 is worn rather than the other part of the absorbent body 40. The crotch stretchable part 200 is configured to be stretchable in at least the longitudinal direction L or the width direction W.

  As shown in FIG. 1, a first notch 115 and a second notch 125 are formed in the absorbent core 40a in the crotch region. The first notch 115 and the second notch 125 are slits formed in the absorber 40. A slit is a portion where no absorbing material exists. The first notch 115 and the second notch 125 each have a notch shape extending from the outer edge of the absorbent core 40a toward the inner side in the width direction W.

  In addition, the disposable diaper 10 does not need to have the crotch expansion-contraction part 200, the 1st notch 115, and the 2nd notch 125. FIG.

  The fastening tape 90 is a pair, extends in the rear waistline region 30 along the width direction W, and is fastened to the non-skin facing surface of the front waistline region 20, so that the disposable diaper 10 is attached to the wearer. It is configured to be held on the body.

  The fastening tape 90 is attached to a region of the side flap 70 corresponding to the rear waistline region 30. Each of the fastening tapes 90 includes a base sheet 91 connected to the side flap 70, a hook sheet 92 provided with engagement hooks (not shown) as a plurality of engagement members, and fixed to the base sheet 91. Is provided. The hook sheet 92 is an area where an engagement member is provided.

  Here, as shown in FIG. 1, the absorbent body 40 (or the absorbent core 40 a) may be arranged on the inner side in the longitudinal direction L than the end portion 92 </ b> E <b> 1 in the longitudinal direction L of the hook sheet 92.

  The target portion 95 is provided on the non-skin facing surface of the exterior sheet 60 in the front waistline region 20. The target portion 95 is configured so that the engaging hook of the fastening tape 90 is hooked, and functions as a loop of a hook and loop locking system.

  As the target portion 95, for example, an air-through nonwoven fabric can be used. The disposable diaper 10 may be configured such that the fastening tape 90 is fixed to the exterior sheet 60 in the front waistline region 20 without having the target portion 95.

  Further, as shown in FIGS. 1 and 2, between the pair of fastening tapes 90 in the width direction W, a waist elastic unit 85 that can expand and contract in the width direction W is provided. The waist elastic section 85 is configured to contract between the fastening tapes 90 in the width direction W.

  In this embodiment, the waist elastic part 85 is constituted by an elastic sheet. The waist elastic part 85 is a part that substantially expands and contracts in the width direction W, and is a concept that excludes a part where the elastic sheet is disposed in a state where the elastic force is not exhibited. Therefore, the outer edge of the waist elastic part 85 to be described later is not the outer edge of the elastic sheet, but the outer edge of the part that expands and contracts.

In the disposable diaper 10 according to the present embodiment, a stretchable film having a basis weight of 20 to 45 g / m ² is used as the waist stretchable portion 85. However, the waist elastic part 85 may be comprised by other structures, such as a plurality of thread rubber. The waist stretchable portion 85 is stretched to a predetermined magnification with respect to the length in the non-stretched state (natural state), and then adhered to the exterior sheet 60 by a hot melt adhesive or heat treatment.

  The waist elastic part 85 extends from the center in the width direction W of the disposable diaper 10 toward both outer sides in the width direction W, and is constituted by a continuous sheet extending in the width direction W. A rear end edge (an outer end portion in the longitudinal direction L) 85E2 of the waist elastic part 85 is located on the front side of the rear end edge 10E2 of the disposable diaper 10. Note that the rear end edge 85E2 of the waist elastic part 85 may coincide with the rear end edge 10E2 of the disposable diaper 10.

  The front end edge 85E1 of the waist elastic part 85 is on the front side of the rear end edge 40E2 of the absorber 40 (or the absorbent core 40a and the core wrap 40b) and on the rear side of the rear end edge 75E2 of the leg elastic part 75. Located in. Therefore, in the plan view of the disposable diaper 10, at least a part of the waist elastic part 85 is configured to overlap the absorber 40 (or the absorbent core 40a).

  Here, the thickness of the absorber 40 in the region overlapping the waist elastic unit 85 may be configured to be thinner than the thickness of the absorber 40 in other regions.

  The waist elastic part 85 straddles the rear end edge of the absorbent body 40 (or the absorbent core 40a and the core wrap 40b) and is located behind the rear end edge of the absorbent body 40 (or the absorbent core 40a and the core wrap 40b). It is configured to extend.

  The outer edge 85WO of the waist elastic part 85 is located on the inner side in the width direction W than the inner edge (inner end in the width direction W) of the fastening tape 90. The waist elastic part 85 and the fastening tape 90 are separated in the width direction W.

  As shown in FIG. 1, the waist elastic part 85 has a first region 851 extending inward in the width direction W from both outer edges 85 WO of the waist elastic part 85, and a width from the inner edge 851 WI of the first region 851. The second region 852 extends inward in the direction W, and the third region 853 extends inward in the width direction W from the inner edge 852WI of the second region 852.

  The first region 851, the second region 852, and the third region 853 are continuous in the width direction W. Therefore, a non-stretchable region that does not stretch in the width direction W is not provided between the first region 851 and the second region 852 and between the second region 852 and the third region 853. Further, the inner edge 851WI of the first region 851 coincides with the outer edge 852WO of the second region 852, and the inner edge 852WI of the second region 852 coincides with the outer edge 853WO of the third region 853.

  The first region 851, the second region 852, and the third region 853 are configured to have different elongation rates in the width direction W. Specifically, the expansion rate in the width direction W of the second region 852 is lower than the expansion rate in the width direction W of the first region 851. In addition, the expansion rate in the width direction W of the third region 853 is higher than the expansion rate in the width direction W of the second region 852.

  In addition, the relationship between the expansion rate in the width direction W of the first region 851 and the expansion rate in the width direction W of the third region 853 may be the same, or either may be higher. Preferably, the expansion rate in the width direction W of the third region 853 is preferably higher than the expansion rate in the width direction W of the first region 851.

  The outer edge 851WO of the first region 851 is located outside the outer edge of the absorbent core 40a in the width direction W. The inner edge 851WI of the first region 851 is located on the inner side in the width direction W than the outer edge of the absorbent core 40a. Therefore, the first region 851 is disposed across the outer edge of the absorbent core 40a.

  Note that at least a part of the first region 851 only needs to be located outside the width direction W of the absorbent core 40a, and the inner edge of the first region 851 is located outside the width direction W of the outer core of the absorbent core 40a. It may be located, and the inner edge of the first region 851 may coincide with the outer edge of the absorbent core 40a.

  The second area 852 is located between the first area 851 and the third area 853. It is preferable that the 2nd area | region 852 is arrange | positioned inside the width direction W rather than the outer edge of the absorption core 40a. The third region 853 is disposed across the center of the disposable diaper 10 in the width direction W. It is preferable that the 3rd area | region 853 overlaps at least one part of the low fabric weight area | region 110 in planar view of the disposable diaper 10. FIG.

  In the disposable diaper 10 according to the present embodiment, the waist elastic part 85 may be symmetric with respect to a center line that passes through the center in the width direction W of the disposable diaper 10 and extends in the longitudinal direction L, or is asymmetric. It may be.

  For example, both the left and right first regions 851 may straddle the outer edge of the absorbent core 40a, or one first region 851 may straddle the outer edge of the absorbent core 40a. . Moreover, both the left and right second regions 852 may be disposed on the inner side in the width direction W with respect to the outer edge of the absorbent core 40a, or one second region 852 may be disposed with respect to the outer edge of the absorbent core 40a. It may be arranged inside the width direction W.

  In addition, the disposable diaper 10 according to the present embodiment may be provided with a region having an extension rate lower than the extension rate of the first region 851 outside the first region 851 in the width direction W.

  As shown in FIG. 3, the waist elastic part 85 is located on the non-skin facing surface side with respect to the absorbent core 40 a. In the present embodiment, the waist elastic part 85 is disposed between the exterior sheet 60 and the back sheet 60a.

  However, in the configuration in which the core wrap 40b extends outward in the longitudinal direction L from the absorbent core 40a, the waist elastic part 85 is disposed between the core wrap 40b and the back sheet 60a or the exterior sheet 60. May be.

  The position of the waist elastic part 85 is not particularly limited. Moreover, in the area | region where the absorber 40 is not arrange | positioned, as shown in FIG. 2, the waist expansion-contraction part 85 may be arrange | positioned between the side flap 70 and the back seat | sheet 60a or the exterior sheet 60. .

  As shown in FIG. 1, in the plan view of the disposable diaper 10, the center line O in the longitudinal direction L of the pair of fastening tapes 90 is configured to overlap the waist elastic part 85 and not to the absorber 40. .

  Further, the length W1 in the width direction W of the waist elastic part 85 is configured to be longer than the length W2 in the width direction W of the absorbent body 40 (or the length in the width direction W of the absorbent core 40a). ing.

  Further, the stretch rate of the region A located outside the absorbent body 40 (or the absorbent core 40a) in the width direction W in the waist elastic part 85 is the absorber 40 (or the absorbent core 40a) in the waist elastic part 85. ) Is different from the expansion rate of the region B located inside the width direction W.

  That is, as shown in FIG. 1, the region A is located outside the virtual line VL1 in the width direction W, and the region B is located inside the width direction W from the virtual line VL1. . Here, the imaginary line VL1 is a line extending from the outer edge of the absorber 40 in the portion of the absorber 40 having the longest length in the width direction W to the rear end edge 10E2 of the disposable diaper 10 along the longitudinal direction L. is there.

  For example, the elongation ratio of the region A located outside the absorbent body 40 (or the absorbent core 40a) in the width direction W in the waist elastic part 85 is the absorber 40 (or the absorbent core 40a in the waist elastic part 85). ) May be configured to be larger than the expansion rate of the region B located inside the width direction W than the absorbent body 40 (or the absorbent core 40a) in the waist stretchable portion 85. You may be comprised so that it may become smaller than the expansion | extension rate of the area | region B located inside W.

  Moreover, as shown in FIG. 1, in the planar view of the disposable diaper 10, you may be comprised so that the waist expansion-contraction part 85 and a pair of leg expansion-contraction part 75 may not overlap.

  On the other hand, as shown in FIG. 1, the waist stretchable portion 85 and the pair of leg side stretchable portions 80 may be configured to overlap in a plan view of the disposable diaper 10.

  Further, as shown in FIG. 1, the inner end portion 85E1 in the longitudinal direction L of the waist elastic portion 85 is disposed on the inner side in the longitudinal direction L than the inner end portion 92E1 in the longitudinal direction L of the hook sheet 92. May be.

  Further, as shown in FIG. 1, the rear end edge 85E2 of the waist elastic portion 85 may be disposed on the outer side in the longitudinal direction L of the outer end portion 92E2 of the hook sheet 92 in the longitudinal direction L.

  In the disposable diaper 10 according to the present embodiment, the waist elastic part 85 is configured to expand and contract in the width direction W, but the waist elastic part 85 expands and contracts in the width direction W and the longitudinal direction L. It may be configured as follows.

  Moreover, the waist elastic | stretch part 85 and the absorber 40 are joined via the adhesive agent. The adhesive that joins the waist elastic part 85 and the absorber 40 is arranged in a plurality of rows continuously in the longitudinal direction L, and each row is arranged so as to overlap the width direction W.

  Specifically, the adhesive has a configuration in which a plurality of spiral shapes that are continuous in the longitudinal direction L are arranged and the rows overlap in the width direction W, or a wave shape that amplitudes in the width direction W and continues in the longitudinal direction L. Are arranged in a plurality of rows and the rows overlap in the width direction W.

  In the disposable diaper 10 according to the present embodiment, the waist elastic part 85 and the absorbent core 40a are not directly joined but indirectly joined via the back sheet 60a and the core wrap 40b.

  An adhesive that bonds the waist elastic part 85 and the back sheet 60a, an adhesive that bonds the back sheet 60a and the core wrap 40b, and an adhesive that bonds the core wrap 40b and the absorbent core 40a continuously in the longitudinal direction L. It is preferable that they are arranged in a plurality of rows and each row is arranged so as to overlap in the width direction W.

  The “elongation rate” in this specification means the degree of elongation, and is performed by the following measurement method.

  1stly, when the disposable diaper 10 is enclosed with the package etc., the disposable diaper 10 is taken out from a package.

  2ndly, the arrangement | positioning area | region of the elastic sheet which comprises the waist periphery expansion-contraction part 85 is cut out, and the sample of a measuring object is prepared. A state where such a sample is allowed to stand for 24 hours in an atmosphere of 20 ° C. ± 2 ° C. and a relative humidity of 60% ± 5% RH is defined as a “natural state”.

  Thirdly, in such a natural state, between the end (front end) on the absorbent core 40a side of the stretchable sheet and the end (rear end) on the waist opening side of the stretchable sheet, that is, At intermediate positions in the longitudinal direction L, points (marks) are intermittently added along the width direction W. Such points are marked (marked) from the reference to the ends in the width direction W of the sample of the elastic sheet at intervals of 5 mm from the reference to the left and right of the width direction W with reference to the center in the width direction W of the elastic sheet.

  Fourth, measure the distance between adjacent points. This distance is the length of the natural state (because it is marked at intervals of 5 mm, it is 5 mm).

  Fifth, from the natural state, the distance between the previous marks when the wrinkles by the elastic member are stretched to a state where they cannot be visually confirmed on the stretchable sheet is measured.

  Sixth, the elongation rate is calculated by the following formula: elongation rate (times) of each part = (distance between marks in the stretched state) / (distance between marks in the natural state).

(2) Manufacturing method of disposable diaper 10 Next, an example of the manufacturing method of the disposable diaper 10 which concerns on this embodiment is demonstrated. In addition, about the method which is not demonstrated in this embodiment, the existing method can be used. Moreover, the manufacturing method demonstrated below is an example and can also be manufactured with another manufacturing method. The manufacturing method of the disposable diaper 10 includes at least a component forming process, a component placing process, a leg circumference forming process, and a cutting process.

  In the component forming process, the components constituting the disposable diaper 10 are formed. Specifically, for example, the absorbent body 40 is molded by laminating absorbent materials, or the fastening tape 90 is formed.

  In the component mounting step, other webs such as a stretchable sheet constituting the waist stretchable portion 85 and a web constituting the topsheet 50, a leakproof sheet, and the absorber 40 are formed on the web constituting the backsheet 60a. The component parts which constitute disposable diaper 10, such as leg expansion-contraction part 75, are mounted.

  In addition, as a method of changing the expansion | extension rate of the waist circumference expansion-contraction part 85, the following method is mentioned, for example.

  The waist stretchable portion 85 is stretched by a gear in the width direction W before the waist stretchable portion 85 is bonded to the back sheet 60a or the like.

  When stretching by such a gear, gear stretching in a region (for example, the second region 852) in which the elongation rate is lowered is weakened. Gear stretching is strengthened in a region (for example, the first region 851 or the third region 853) where the elongation rate is increased. The strength of the gear extension can be adjusted by changing the depth of the gear protrusion, the pitch of the gear protrusion, or the number of times of gear extension. The stretch rate of the strongly stretched region is relatively high, and the stretch rate of the weakly stretched region is relatively low.

  In the leg periphery forming step, the top sheet 50, the exterior sheet 60, and the back sheet 60a are cut. Thereby, the leg opening part 35 arrange | positioned around a wearer's leg is formed.

  In the cutting step, the continuous body in which the top sheet 50, the back sheet 60a, the absorber 40, and the like are arranged is cut into the size of one product along the width direction W. Thereby, the disposable diaper 10 is manufactured.

(3) Action / Effect In the disposable diaper 10 according to the present embodiment, the length W1 in the width direction W of the waist elastic part 85 is greater than the length W2 in the width direction W of the absorbent body 40 (or the absorbent core 40a). The center line O in the longitudinal direction L of the fastening tape 90 overlaps with the waist elastic part 85 and does not overlap with the absorber 40 in the plan view of the disposable diaper 10. Therefore, when the disposable diaper 10 is worn, when the wearing assistant pulls the fastening tape 90, it is possible to solve the problem of obstructing the expansion and contraction of the waist elastic part 85 due to the rigidity of the absorber 40. Therefore, the disposable diaper 10 can be firmly fitted to the circumference of the wearer's waist.

  In FIG. 4, the mounting | wearing aspect to the wearer of the disposable diaper 10 is shown typically. 4A shows a state in which the fastening tape 90 is fastened to the front waistline region 20 and the wearer is sleeping, and FIG. 4B shows that the fastening tape 90 is fastened to the front waistline region 20. However, the wearer is awake.

  When the tape-type disposable diaper 10 is worn on the wearer, the wearing assistant places the wearer's back on the rear waist area 30 of the disposable diaper 10 and puts the fastening tape 90 outside in the width direction W. By pulling, the fastening tape 90 is fastened to the front waistline region 20. As shown to Fig.4 (a), in this case, a wearer's body pressure is applied to the back waist area 30 of the disposable diaper 10. FIG.

  In such a case, the force generated when the wearing assistant pulls the fastening tape 90 to the outside in the width direction W is positioned more inside the width direction W than the absorbent body 40 (absorption core 40a) in the waist elastic part 85. Since it does not reach the area | region B, when a wearer gets up after mounting | wearing of the disposable diaper 10, a clearance gap may arise between a wearer and the disposable diaper 10. FIG.

  Here, in the disposable diaper 10 according to this embodiment, the stretch rate of the region A located outside the absorbent body 40 (or the absorbent core 40a) in the width direction W in the waist stretchable portion 85 is the waist stretchable portion. In the case where the wearer gets up in the case where the wearer rises in 85, the stretch rate of the region B located inside the width direction W is larger than the absorber 40 (absorbing core 40a). In order to solve the problem that there is a possibility that a gap may be formed between the wearer and the disposable diaper 10 because the region A having a larger elongation rate than the region B is pulled and stretched in the width direction W. it can.

  On the other hand, in the disposable diaper 10 according to the present embodiment, the stretch rate of the region A located outside the absorbent body 40 (or the absorbent core 40a) in the width direction W in the waist stretchable portion 85 is the waist stretchable portion 85. In the case where the disposable diaper 10 is worn on the wearer in the case where the absorbent body 40 (absorbing core 40a) is configured to be smaller than the elongation rate of the region B located on the inner side in the width direction W. Even if the assistant pulls the fastening tape 90 with a weak force, the amount of elongation in the width direction W of the region A increases, so when the wearer gets up after wearing the disposable diaper 10, the region B becomes It is possible to solve the problem that there is a possibility that a gap is generated between the wearer and the disposable diaper 10 by being pulled in the width direction W by the region A and extending.

  In addition, in the plan view of the disposable diaper 10 according to the present embodiment, the waist circumference stretchable portion 85 and the pair of leg stretchable portions 75 are configured so as not to overlap. Following the movement, it is possible to avoid a situation in which the waist stretchable portion 85 is pulled inward in the longitudinal direction L and does not fit tightly around the wearer's waist.

  Moreover, in the planar view of the disposable diaper 10 which concerns on this embodiment, since it is comprised so that the waist circumference expansion-contraction part 85 and a pair of leg side expansion-contraction part 80 may overlap, the disposable diaper 10 is toward the waist circumference expansion-contraction part 85. The situation where the wearer's body and the disposable diaper 10 are separated from each other can be suppressed.

  Moreover, in the planar view of the disposable diaper 10 which concerns on this embodiment, it is comprised so that the waist expansion-contraction part 85 and the absorber 40 (or absorption core 40a) may overlap, and the area | region which has overlapped with the waist expansion-contraction part 85 Since the thickness of the absorber 40 (or the absorption core 40a) in the above is configured to be thinner than the thickness of the absorber 40 (or the absorption core 40a) in other regions, the absorber 40 (or The absorbent core 40a) can be pressed by the waist elastic part 85 to improve the fit with the wearer.

  Moreover, in the disposable diaper 10 which concerns on this embodiment, since the absorber 40 (or absorption core 40a) is arrange | positioned inside the longitudinal direction L from the edge part 92E1 inside the longitudinal direction L of the hook sheet | seat 92. FIG. The influence of the force generated when the fastening tape 90 is pulled outside in the width direction W on the region B can be more reliably reduced.

  Further, in the disposable diaper 10 according to this embodiment, the inner end 85E1 in the longitudinal direction L of the waist elastic part 85 is more inward in the longitudinal direction L than the inner end 92e1 in the longitudinal direction L of the hook sheet 92. Fastening is performed because the outer end 85E2 in the longitudinal direction L of the waist elastic part 85 is disposed outside the end 92E2 in the longitudinal direction L of the hook seat 92 in the longitudinal direction L. The force generated when the tape 90 is pulled outside in the width direction W can efficiently affect the waist elastic portion 85, and the fit of the waist elastic portion 85 to the wearer can be improved.

  Furthermore, in the disposable diaper 10 according to the present embodiment, the pair of leg stretchable parts 75 are configured to spread outward in the width direction W toward the rear waistline region 30, so that the disposable diaper 10 is attached. Later, the force by which the waist elastic portion 85 is pulled in the longitudinal direction L can be dispersed outside the width direction W.

  Generally, the wearer's body is placed so as to cover the entire width of the absorbent core 40a when worn. Therefore, when the fastening tape 90 is pulled, a portion located outside the wearer's body in the width direction W, that is, a region outside the width direction W from the absorbent core 40a is pulled.

  For example, if the portion where the fastening tape 90 is pulled is difficult to stretch, the wearing assistant cannot grasp how much the fastening tape 90 may be stretched and may not be fixed at the correct position.

  However, since the first region 851 having a relatively high elongation rate is disposed outside the absorbent core 40a in the width direction W, the wearing assistant extends the first region 851 and fastens the fastening tape 90. To do. Since it is easy for the wearing assistant to extend the first region 851, it is possible to easily grasp the range in which the first region 851 can be extended. Therefore, the wearing assistant can grasp the range in which the fastening tape 90 is stretched and can fasten the fastening tape 90 at the correct position.

  Moreover, when fastening the fastening tape 90, the 1st area | region 851 is arrange | positioned in the position which hits a wearer's side hipbone. On the other hand, when fastening the fastening tape 90, the second region 852 and the third region 853 are in a state in which the wearer's body pressure is applied and it is difficult to expand and contract.

  However, after the disposable diaper 10 is mounted on the wearer, for example, when the wearer is raised, the body pressure applied to the rear waist region 30 of the disposable diaper 10 is reduced. When the wearer's body pressure applied to the rear waistline region 30 is reduced, as shown in FIG. 4B, the first region 851, the second region 852, and the third region 853 are interlocked, and the first region 851 is the base point. As a result, the second region 852 and the third region 853 expand and contract, respectively.

  Specifically, the first area 851 is already extended when the fastening tape 90 is attached, as compared with the second area 852 and the third area 853. When the second region 852 and the third region 853 expand and contract in this state, the second region 852 having a relatively low expansion rate is pulled toward the first region 851 with the first region 851 as a base point, and the relatively high expansion rate. The third region 853 having a high height pulls the second region 852 inward in the width direction W, and the second region 852 extends.

  At this time, since the first region 851 is located closer to the fastening tape 90, the first region 851 extends when the fastening tape 90 is fixed to the target portion 95. At this time, the second region 852 located between the first region 851 and the third region 853 has a width direction W due to the presence of the third region 853 that is more difficult to extend inside the width direction W than the second region 852. As a result, the second region 852 can be evenly fitted to the body while preventing the baby's body from being tightened with a weak force.

  By fitting the disposable diaper 10 to the wearer's body in this way, the first region 851 fits the hip bone next to the wearer more strongly. In addition, the back side of the wearer's side lower than the hipbone has few hipbones, and the wearer's body is relatively soft. The second region 852 fits weakly in a portion where the hip bone is small. The wearer's body fits tightly on a relatively hard part and the wearer's body fits weakly on a relatively soft part, so it fits comfortably on the wearer's body and improves the fit around the waist it can. In other words, in order to prevent the leakage of excrement without creating a gap between the disposable diaper 10 and the wearer's body that the mother (assistant) originally wishes to not tighten the baby with a diaper. By adopting the configuration of the present invention, it is possible to contradict each other such that it is better to improve the property (intensify tightening).

  The third region 853 is disposed across the center of the disposable diaper 10 in the width direction W. In the center of the wearer's back, the spine is arranged and is recessed on the ventral side from the left and right parts. Such a recessed part (Michael's rhombus) is a sacral dent, and the third region 853 is disposed in the recessed part. In FIG. 4A, such a recessed portion is indicated by “CR”.

  After wearing the disposable diaper 10, when the body pressure is reduced, the third region 853 contracts while pulling the second region 852. Such a contracted portion can be placed in a recessed portion of the wearer. Therefore, it can suppress that a clearance gap arises between the center of a wearer's back, and the disposable diaper 10, and can fit the disposable diaper 10 with respect to the whole waist circumference.

  In addition, since there is a difference in the thickness of the absorbent core 40a before and after the rear edge of the absorbent core 40a, a gap is easily formed between the wearer's body and the disposable diaper 10 originally. However, the rear end edge of the waist elastic part 85 extends to the waist side beyond the rear end edge of the absorbent core 40a, and the third region 853 has a relatively high extension rate. Leakage from can be prevented more reliably.

  Since the absorption core 40a has relatively higher rigidity than other members (top sheet 50) constituting the disposable diaper 10, it is difficult to arrange the absorbent core 40a along the wearer's body. However, since at least a part of the waist elastic part 85 overlaps the absorbent core 40a and the waist elastic part 85 is disposed on the non-skin facing surface side of the absorbent core 40a, the waist elastic part 85 contracts. The absorbent core 40a can be fitted to the wearer's body.

  If the third region 853 is disposed in the entire width direction W of the absorbent core 40a, the width of the absorbent core 40a may become too short in the natural state due to the contraction of the third region 853. As a result, the width of the disposable diaper 10 cannot be secured when the fastening tape 90 is fastened, and it becomes difficult for the wearing assistant to grip the fastening tape 90, and the wearability may be deteriorated.

  However, since the second region 852 is positioned inside the width direction W with respect to the outer edge of the absorbent core 40a, the second region 852 and the third region 853 are disposed in the entire width direction W of the absorbent core 40a. Therefore, in the natural state, the width of the absorbent core 40a does not become too short, and it can be suppressed that the wearability is deteriorated.

  The inner edge of the first region 851 is located on the inner side in the width direction W than the outer edge of the absorbent core 40a. When the fastening tape 90 is pulled and attached, the wearing assistant extends the first region 851 and fastens the fastening tape 90. Moreover, when extending the 1st area | region 851 and fastening the fastening tape 90, the absorption core 40a is arrange | positioned under a wearer's body, and the body pressure is applied. Since the inner edge of the first region 851 is arranged on the inner side in the width direction W than the outer edge of the absorbent core 40a, the inner edge of the absorbent core 40a is worn by the wearer when the fastening tape 90 is pulled. It is difficult to move under the body. Therefore, when the inner edge of the first region 851 is positioned on the inner side in the width direction W than the outer edge of the absorbent core 40a, when the fastening tape 90 is pulled, the inner edge of the first region 851 serves as a base point. One region 851 can be easily extended.

  The adhesive that adheres the waist elastic part 85 and the absorbent core 40a may be arranged in a plurality of rows continuously in the longitudinal direction L, and each row may be arranged in the width direction W. According to this configuration, the waist elastic part 85 and the absorbent core 40a can be bonded continuously in the longitudinal direction L and the width direction W, and the waist elastic part 85 can be prevented from floating from the absorbent core 40a.

  The expansion rate in the width direction W of the third region 853 may be configured to be higher than the expansion rate in the width direction W of the first region 851. According to such a configuration, the extension rate of the third region 853 is higher than the extension rate of the first region 851, so that the body pressure applied to the rear waistline region 30 is reduced after the fastening tape 90 is fastened. In this state, the second region 852 is pulled toward the third region 853 side. Therefore, the portion contracted by the third region 853 can be collected in the dent on the wearer's back.

  The third area 853 overlaps at least a part of the low weight area 110 in the plan view of the disposable diaper 10. According to such a configuration, the low weight area 110 is contracted in the width direction W by the third region 853, and the rear end edge of the absorbent core 40 a is deformed toward the center side in the width direction W. Therefore, the rear part of the absorption core 40a can be formed in a cup shape. The cup-shaped absorbent core 40a can cover the wearer's buttocks and can further improve the fit around the waist.

  The rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b are substantially coincident, and the waist elastic part 85 extends rearward from the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b. To do. For example, if the core wrap 40b extends rearward from the absorbent core 40a, the stretchability of the waist elastic part 85 may be hindered by the core wrap 40b. However, since the waist elastic part 85 extends rearward from the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b, the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b are rearward. The core wrap 40b and the like do not hinder expansion / contraction of the waist elastic section 85.

  Moreover, the waist elastic part 85 is not arrange | positioned at the rear-end edge of the disposable diaper 10, and the inner side of the width direction W and the inner side of the longitudinal direction L are provided in the side flap 70 of the rear-end edge of the disposable diaper 10. A notch that is recessed is formed.

  More specifically, the rear edge of the side flap 70 is recessed in the longitudinal direction L within a certain range extending from the outer edge of the side flap 70 to the inside in the width direction W. In other words, the outer edge of the side flap 70 is recessed inward in the width direction W within a certain range extending inward in the longitudinal direction L from the rear edge of the side flap 70.

  Thus, by comprising the rear-end edge of the disposable diaper 10, the turn-up in the rear-end edge of the disposable diaper 10 can be suppressed, and a wearer's waist circumference can be covered more reliably.

  Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 10 ... Disposable diaper 20 ... Front waist area 25 ... Inseam area 30 ... Rear waist area 35 ... Leg circumference opening 40 ... Absorber 40a ... Absorption core 40b ... Cover sheet 50 ... Top sheet 60 ... Exterior sheet 60a ... Back sheet 70: Side flap 75 ... Leg stretchable part 80 ... Leg side stretchable part 85 ... Waist circumference stretchable part 851 ... First area 852 ... Second area 853 ... Third area 90 ... Fastening tape 110 ... Low weight area 115 ... First cut Notch 125 ... 2nd notch 200 ... Crotch expansion and contraction part L ... Longitudinal direction W ... Width direction

Claims (8)

A front waistline region, a back waistline region, and a crotch region located between the front waistline region and the back waistline region,
A longitudinal direction from the front waistline region to the rear waistline region, and a width direction orthogonal to the longitudinal direction,
A pair of fastening tapes extending along the width direction in the rear waistline region and fastened to the front waistline region;
An absorbent body extending over at least one of the front waistline region and the back waistline region across the crotch region;
A disposable diaper disposed between the pair of fastening tapes and having a waist elastic part extending and contracting in the width direction,
In a plan view of the disposable diaper, the longitudinal center line of the pair of fastening tapes is configured to overlap the waist elastic part and not to overlap the absorber.
The length in the width direction of the waist stretchable part is configured to be longer than the length in the width direction of the absorber,
The stretch rate of the region located on the outer side in the width direction than the absorber in the waist stretchable portion is different from the stretch rate of the region located on the inside in the width direction than the absorber in the waist stretchable portion. is configured to,
In the plan view of the disposable diaper, the waist elastic part and the absorber are configured to overlap,
The disposable diaper characterized in that a thickness of the absorbent body in a region overlapping with the waist elastic part is configured to be thinner than a thickness of the absorbent body in other regions .   In the waist stretchable part, the stretch rate of the region located on the outer side in the width direction than the absorber is larger than the stretch rate of the region located in the width direction on the inside of the waist in the waist stretchable part. It is comprised so that it may become large, The disposable diaper of Claim 1 characterized by the above-mentioned. A pair of leg openings;
It has a pair of leg stretchable parts arranged inside the width direction than the pair of leg openings and stretchable in the longitudinal direction,
The disposable diaper according to claim 1 or 2, wherein the waist stretchable part and the pair of leg stretchable parts are configured not to overlap each other in a plan view of the disposable diaper. It has a pair of leg side elastic parts extending along the longitudinal direction inside the width direction of the pair of leg elastic parts,
4. The disposable diaper according to claim 3, wherein, in a plan view of the disposable diaper, the waist elastic part and the pair of leg side elastic parts overlap each other. It has side flaps that extend outward in the width direction from the absorber,
Each of the pair of fastening tapes includes a base sheet connected to the side flaps, and a hook sheet provided with an engagement hook and fixed to the base sheet.
The disposable diaper according to any one of claims 1 to 4 , wherein the absorbent body is disposed on the inner side in the longitudinal direction than an end portion on the inner side in the longitudinal direction of the hook sheet. It has side flaps that extend outward in the width direction from the absorber,
Each of the pair of fastening tapes includes a base sheet connected to the side flaps, and a hook sheet provided with an engagement hook and fixed to the base sheet.
The inner end portion in the longitudinal direction of the waist elastic part is disposed on the inner side in the longitudinal direction than the inner end portion in the longitudinal direction of the hook sheet,
Outer ends of the longitudinal direction of said waist-surrounding stretchable portion, claims 1 to 5, characterized in that it is disposed outside of the longitudinal direction than an end portion of the longitudinal direction of the outside of the hook sheet The disposable diaper as described in any one of.   4. The disposable diaper according to claim 3, wherein the pair of leg stretchable parts are configured to spread outward in the width direction toward the rear waist area. The waist elastic part is
A first region extending inward in the width direction from both outer edges of the waist elastic part;
A second region extending from the inner edge of the first region toward the inner side in the width direction and having a lower elongation rate than the first region;
A third region extending from the inner edge of the second region toward the inner side in the width direction and having a higher elongation rate than the second region;
The disposable diaper as described in any one of Claims 1 thru | or 7 comprised so that at least one part of the said 1st area | region may be located in the said width direction outer side of the said absorber.

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