KR20170009829A - Unfolding-type disposable diaper for infants weighing 3000 grams or less at birth - Google Patents

Abstract

A disposable diaper (1) for use in a low birth weight infant having a weight of 3000 grams or less, wherein the disposable diaper (1) is provided along the longitudinal direction at both lateral sides of the crotch lower portion (1m) And a leg-surrounding elastic member (21) for retracting the leg-like elastic member along the longitudinal direction. The back side portion 1b has a waist elastic sheet 31 extending to both sides in the transverse direction for contraction of the waist-hole opening portion HB in the transverse direction. In the deployed state of the diaper 1, the transversely opposite end portions of the waist elastic sheet 31 are located at the ends of the longitudinally opposite isosceles side end portions of the leg- The elastic sheet 31 is positioned at the same position with respect to the longitudinal direction of the fastening tape 11 or at the same position with respect to the transverse direction of the fastening tape 11, The center position C11m in the longitudinal direction in the longitudinal direction 11m is arranged in the longitudinal direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a disposable diaper for a low birth weight infant having a weight of 3000 grams or less,

The present invention relates to a disposable diaper for a low birth weight infant less than 3000 grams.

BACKGROUND ART Conventionally, a disposable diaper of a developing type is known. The diaper has an abdominal side portion, a crotch lower portion and a back side portion in a longitudinal direction and has a roughly hourglass-like planar shape. Each of the fastening tapes provided at both ends in the transverse direction of the back side portion is attached to the target tape of the back side portion so that the waist-hole opening and the pair of leg-hole opening portions are formed.

Japanese Patent Application Laid-Open No. 2002-253608

On the other hand, there are low birth weight babies born with a low birth weight of less than 3000 grams. And, these low birth weight babies spend most of their time in fetal bending posture when they are inside the mother after birth. The fetal-type bending posture is also referred to as a positioning posture. As shown in Fig. 1A, the fetal-type bending posture is a posture in which the back is rounded in a C-shape as viewed from the side and an appropriate safety treatment such as lying on a round cushion . And, while the sister can exchange the position with the back properly, most of the time is in this prone position. In addition, in view of not giving unnecessary stress to some low-birth weight infants 101, there is a case in which the mind of minimally handling is considered to be preferable to not touch the body. The disposable diaper 1 'is also used for such a low-birth-weight baby.

FIG. 1B shows an arrow view of arrow BB in FIG. 1A. Here, in this positioning posture, the legs of the low-weighted child 101 are opened with M legs (opened legs) It is pulled in such a state that it is attached. Therefore, the fastening tape 11 'caught by the target tape 15' of the abdomen side portion 1a 'is pushed from the leg-hole opening HL' side to the waist-hole opening HB 'side by the knee or thigh It is raised. In addition, since a large amount of time is spent in this positioning posture, the pushing force F continues to work for a long time. Therefore, as shown in the schematic side view of Fig. 1C, the copper tape 11 'is gradually tilted from the leg-hole opening HL' side to the waist-hole opening HB 'side (see the dot shape in Fig. 1C) Finally, it falls apart. Then, when the fastening tape 11 'is dropped, it is necessary to refill the fastening tape 11', but at that time, it is impossible to contact the low-weighted child 101 and it is opposed to the minimum handling.

As described above, in the same positioning posture, the posture of the C-shaped prone is seen from the side. In this posture, since the back is rounded as shown in Fig. 1A, the distance between the back and the back side 1b ' (G). Then, the diaper 1 'must be mounted again so that the clearance G becomes small. As a result, as described above, it is impossible for the user to contact the low birth weight 101, which is against the minimum handling.

Disclosure of the Invention The present invention has been made in view of the above-described conventional problems, and its object is to provide a disposable diaper for a low birth weight infant having a weight of 3000 grams or less, which is characterized in that a fastening tape hanging on a double- The back side of the diaper is in close contact with the back.

According to a first aspect of the present invention,

A crotch part disposed on the lower part of the low birth weight and a back side part arranged on the back side of the low weight part in a lateral direction, Side by side in an orthogonal longitudinal direction,

And a pair of leg-hole openings and a pair of leg-hole openings are formed by fastening the end portions to the abdomen side portions through fastening tape fastening portions provided at the respective end portions in the transverse direction of the back side portion As an expandable disposable diaper,

And leg-surrounding elastic members provided along the longitudinal direction at respective angular positions on both sides in the lateral direction in the crotch portion and for contraction of the leg-openings along the longitudinal direction,

And a waist elastic sheet extending from both sides of the back side in the back side to shrink the waist opening in the transverse direction,

The lateral edges of the waist elastic sheet in the deployed state of the diaper are positioned at the same positions with respect to the transverse direction in the transverse direction with respect to the position of the end of the longitudinally- The longitudinal direction of the fastening tape is located at the outer side in the transverse direction with respect to the longitudinal direction of the fastening tape, Of the disposable diaper for a low birth weight infant of 3000 grams or less.

Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

According to the present invention, with respect to the disposable diaper having a weight of 3000 grams or less, the back side of the diaper can be brought into close contact with the back, while preventing the fastening tape caught on the abdominal side portion from being restrained from falling off .

1A of FIG. 1A is a schematic side view of a low birth weight 101 in a positioning posture, and FIG. 1B is a BB arrow view in FIG. 1A for explaining a pushing force F acting on a fastening tape 11 ' Fig. 1C is a schematic side view showing a state in which the fastening tape 11 'is bent by a pushing force F. Fig.
2 is a schematic plan view of the disassembled state of the disposable diaper 1 of the present embodiment.
3A, 3B and 3C of FIG. 3 are sectional views taken along the lines AA, BB, and CC in FIG. 2, respectively.
4 is a schematic perspective view of the disposable diaper 1 in a mounted state.
Fig. 5 is an explanatory view of another embodiment of the disposable diaper 1 of the present embodiment, and is a schematic plan view of the expanded state of the diaper 1. Fig.
6 is an explanatory diagram of the case where the fastening tapes 11 and 11 fastened to the target tape 15 are at the positions sandwiching the low rigidity portion 3na of the absorbent body 3 from both sides in the transverse direction .
Fig. 7 is an explanatory diagram of the contraction effective portion 31a and the ineffective portion 31n of the waist elastic sheet 31. Fig.
Fig. 8 is an explanatory view of the case where the fastening tapes 11, 11 are engaged with each other in such a manner that the fastening tapes 11, 11 overlap each other.
Fig. 9 is an explanatory diagram of a measuring method of the fastening force (N / 10 mm) of the fastening tape 11. Fig.

At least the following matters will become apparent from the description of this specification and the accompanying drawings.

A crotch part disposed on the lower part of the low birth weight and a back side part arranged on the back side of the low weight part in a lateral direction, Side by side in an orthogonal longitudinal direction,

And a pair of leg-hole openings and a pair of leg-hole openings are formed by fastening the end portions to the abdomen side portions through fastening tape fastening portions provided at the respective end portions in the transverse direction of the back side portion As an expandable disposable diaper,

And leg-surrounding elastic members provided along the longitudinal direction at respective angular positions on both sides in the lateral direction in the crotch portion and for contraction of the leg-openings along the longitudinal direction,

And a waist elastic sheet extending from both sides of the back side in the back side to shrink the waist opening in the transverse direction,

The lateral edges of the waist elastic sheet in the deployed state of the diaper are positioned at the same positions with respect to the transverse direction in the transverse direction with respect to the position of the end of the longitudinally- The longitudinal direction of the fastening tape is located at the outer side in the transverse direction with respect to the longitudinal direction of the fastening tape, Of the disposable diaper for a low birth weight infant of 3000 grams or less.

According to such an expandable disposable diaper, the lateral ends of the waist elastic sheet are positioned at the same position with respect to the position of the end of the back isoside in the longitudinal direction of the nearest perimeter elastic member, , And is located on the outer side in the transverse direction than the above. Therefore, the end portions of the elastic members are less likely to be influenced by the force generated in the elastic members, so that the end portions of the elastic members are elastically deformed in the lateral direction by tensile force So that the fastening tape can be acted on quickly. By applying a shear force in the lateral direction to the fastening tape of the fastening tape, the fastening portion can be fastened to the double-side portion with a high fastening force, and as a result, the fastening tape can be effectively restrained from falling or falling .

Since the waist-surrounding elastic sheet is arranged so that the central position in the longitudinal direction of the fastening tape on the fastening tape is arranged in the longitudinal direction, the force to be contracted is set to a substantially uniform distribution with less longitudinal deflection, And this also effectively contributes to suppressing the above-mentioned tilting and dropping.

Further, since such a waist elastic sheet is sheet-like, tensile force can be applied to the fastening tape with a substantially uniform distribution with less deflection in the longitudinal direction, as compared with the case where a yarn-shaped elastic member is used. Which is effectively contributed to suppressing the turn-over and fall-off.

In addition, the clearance that can be generated between the back side of the diaper and the side bent in the C-shape of the low-weighted child in the positioning posture is reduced on the basis of the force to contract the waist elastic sheet. Therefore, the back side of the diaper can be brought into close contact with the back of the low birth weight infant.

As such an expandable disposable diaper,

And the end portion of the waist elastic sheet is connected to the fastening tape which is closest to the end portion in the transverse direction of the end portion.

According to such an expandable disposable diaper, the waist elastic sheet is connected to the fastening tape at the outer end of the end portion in the lateral direction. Therefore, the force to shrink the end portion can be applied to the fastening tape quickly and reliably.

As such an expandable disposable diaper,

The direction orthogonal to both the longitudinal direction and the transverse direction is along the thickness direction of the diaper in the deployed state,

An absorbent body extending along the longitudinal direction over the abdomen side portion, the crotch lower side portion and the back side portion, and a leakage preventing sheet for covering the absorber from the non-skin side in the thickness direction,

Wherein the waist elastic sheet is overlapped with both of the absorbent body and the anti-glare sheet when viewed in the thickness direction, and each of the transverse end portions of the waist elastic sheet is in contact with the absorbent body and the through- It is preferable that the position of the edge of the sheet is equal to the position of the edge of the sheet in the transverse direction or is located outside the sheet in the transverse direction.

According to such an expandable disposable diaper, the transversely opposite end portions of the waist elastic sheet are positioned at the same positions as the transversely opposite end edges of both the absorbent body and the through sheet, or alternatively, Is located. Therefore, when the fastening tape is stretched in the transverse direction for attaching the diaper, the end portion can be stretched freely without being subjected to a large resistance force from the absorbent body and the barrier sheet. In this way, the force to shrink at the end portion can be quickly applied to the fastening tape.

As such an expandable disposable diaper,

The absorber having an isosceles low-rigidity portion having a stiffness lower than that of the surrounding portion in correspondence with the position of the back side portion,

The isosceles low elasticity portion preferably overlaps with the waist elastic sheet when viewed in the thickness direction.

According to such an open type disposable diaper, the back side low rigidity portion overlaps with the waist elastic sheet. Therefore, when the fastening tape is stretched in the transverse direction at the time of the attachment of the diaper, at least the isosceles low-stiffness portion in the absorber rapidly decreases in the transverse direction, and the isosceles stiffness portion does not become a large resistance. In this way, the waist elastic sheet can be stretched with a small tensile force. As a result, it is possible to easily generate a force to shrink the waist elastic sheet.

In addition, the isosceles low-rigidity portion is easily reduced in the lateral direction. Therefore, at the time of wearing, the shoulder-side low-rigidity portion is rapidly reduced due to the force of the waist-surrounding elastic sheet to shrink. Therefore, the clearance that may occur between the back side of the diaper and the like bent in the C-shape of the low-weighted child in the positioning posture is quickly reduced based on the contraction of the isocommitally low-rigidity portion.

As such an expandable disposable diaper,

Wherein the abdomen side portion has a target region for engaging the engaging portions of the fastening tape at the respective end portions of the back side portion,

Wherein the absorber has a bifurcated low stiffness portion having a stiffness lower than that of the surrounding portion in correspondence with the position of the abdominal side portion,

And the double-sided low-stiffness portion overlaps the target region when viewed in the thickness direction.

According to such an expandable disposable diaper, when the fastening position of the fastening portion of each fastening tape caught in the target area at the time of fitting is a position sandwiching the double-side low-stiffness portion from both sides in the transverse direction, The low-stiffness portion on the side of the double-side is easily expanded on the basis of the force to be shrunk. With this enlarging operation, the engaging portion moves slightly in the lateral direction, so that the engaging portion can be reliably engaged with the target region, thereby making it possible to secure the engaging portion between the engaging portion and the target region.

As such an expandable disposable diaper,

Wherein the fastening tape has a shape with a side at an inner position in the transverse direction,

The elastic member is a band-like elastic sheet having a pair of long sides along the longitudinal direction and a pair of short sides along the lateral direction,

Wherein a portion of the waist elastic sheet is divided into a rectangular region defined by a short side located on the back side of the pair of short sides and an inner side in the transverse direction of the fastening tape on the fastening tape, .

According to such an expandable disposable diaper, a portion of the waist elastic sheet is located in the rectangular area. The rectangular region is a transmission path through which force can be transmitted from the leg-hole elastic member to the engagement portion of the fastening tape. Therefore, even when a force for pulling down the engagement portion from the leg-hole elastic member to the opening portion of the leg-openings is transmitted, such a force is mitigated by the part of the elastic member for the waist-surrounding elastic member and transmitted to the engagement portion, The falling of the fastening tape can be effectively suppressed.

As such an expandable disposable diaper,

Wherein the waist elastic sheet has an effective portion that contracts the waist-hole opening in the transverse direction and an invalid portion that does not shrink the waist-hole opening in the transverse direction,

It is preferable that the invalid portion is located at each end in the transverse direction of the waist elastic sheet and is located between the fastening tape and the effective portion.

According to such an expandable disposable diaper, the invalid portion is located between the fastening tape and the effective portion. Therefore, when the fastening tape is stretched in the transverse direction, the invalid portion elongates relatively easily. The force to be contracted due to such elongation can be quickly applied to the fastening tape as a tensile force in the transverse direction. Therefore, the fastening portion of the fastening tape can be hooked to the stomach side portion with an appropriate holding force.

As such an expandable disposable diaper,

Wherein the fastening tape at one end of each of the ends is used as a first tape and the fastening tape at the other end is used as a second tape and the latching portion of the first tape is hooked to the stitching portion, The engaging portion of the first tape and the surface of the non-engaging portion of the first tape are overlapped with each other on the side of the non-engaging portion of the first tape, (N / 10 mm) between the engaging portion and the abdomen side portion of the first tape and the engaging force (N / 10 mm) between the engaging portion and the abdomen side portion of the second tape, (N / 10 mm) between the surface of the first tape on the side of the non-engaging portion and the engaging portion of the second tape, respectively,

And the second tape is positioned on the side of the non-engaging portion of the first tape while being aligned such that the center position of the first tape and the center position of the second tape match, It is preferable that the first tape and the second tape are set such that when the latching portion is overlaid, the latching portion of the second tape protrudes from both sides of the first tape in the longitudinal direction .

According to such an expandable disposable diaper, the engagement force when the engagement portion of the second tape is hooked on the side of the non-engagement portion of the first tape is 0.1 (N / 10 mm) or more. Therefore, the first tape and the second tape can be surely hooked to the stomach side portion by the form in which the fastening tapes are superimposed (hereinafter, also referred to as "fastening tape superposition type"). In other words, the latching portion of the first tape can be hooked to the stomach side portion, and the latching portion of the second tape can be surely hooked to the side of the non-engaging portion of the first tape.

In the case of the " fastening tape superposition type ", the first and second tapes can be respectively collected at the central portion on the side of the lateral direction of the double side portion, . ≪ / RTI > As a result, the above-mentioned push-up force applied to the first and second tapes from the M-shaped leg is reduced, so that the first and second tapes are prevented from being bent or fallen.

According to the above configuration, it is possible to easily detach the second tape from the first tape in the form of a fastening tape superposition, and to further strengthen the fastening state of the second tape. The details are as follows.

First, as described above, the engaging force (N / 10 mm) between the male member and the abdomen side portion of the first tape is set such that the engaging force between the surface of the first tape on the side of the non-engaging portion and the engaging portion of the second tape (N / 10 mm). As a result, when the copper tape is taken off the first tape by holding the second tape, it is possible to effectively prevent the first tape from being detached from the rear side portion together effectively, Can be removed from the first tape. Thus, the second tape can be easily detached from the first tape, which effectively contributes to the minimum handling.

On the other hand, in the fastening tape overlapping mode, as described above, the latching portion of the second tape is caught on the side of the non-engaging portion of the first tape, at which time the latching portion of the second tape is bent toward both sides in the longitudinal direction It comes out in the shape. Here, the engaging force (N / 10 mm) with the abdomen side portion is larger than the engaging force (N / 10 mm) with the side of the non-engaging portion of the first tape . As a result, the engaging force of the engaging portion of the second tape can be increased by the portion exposed.

=== Embodiment Mode ===

2 is a schematic plan view of the disassembled state of the disposable diaper 1 of the present embodiment. 3A, 3B and 3C are a cross-sectional view taken along the line A-A, a cross-sectional view taken along the line B-B, and a cross-sectional view taken along the line C-C, respectively. 4 is a schematic perspective view of the disposable diaper 1 in a mounted state.

This diaper 1 is a diaper 1 specialized for low birth weight infants of 3000 grams or less and is an expanding type diaper 1 to be attached to a low birth weight infant 101 by using a fastening tape 11. [ The diaper 1 in the unfolded state shown in Fig. 2 has three directions perpendicular to each other and has a longitudinal direction, a lateral direction and a thickness direction. Here, in the longitudinal direction, the abdomen side portion 1a, the crotch lower portion 1m, and the back side portion 1b are arranged side by side in this order. The crotch lower portion 1m covers the lower part of the low birth weight 101 and the back side part 1b covers the lower part of the lower body 101. [

2, the front waist region 1a and the back waist region 1b protrude from both sides in the transverse direction of the crotch lower portion 1m, The outer shape is approximately hourglass in plan view. Side flap 1asf ", which are the portions 1asf and 1asf protruding to both sides in the lateral direction of the front-side portion 1b, are also referred to as " The portions 1bsf and 1bsf are also referred to as " backside flap 1bsf ". Each of the shoulder side flaps 1bsf and 1bsf corresponds to " each end in the lateral direction " In the following description, one side in the thickness direction is referred to as " skin side ", and the other side is also referred to as " non-skin side ". In this regard, a schematic plan view of Fig. 2 is seen from the skin side of the diaper 1 in an unfolded state.

Here, as shown in Fig. 2, fastening tapes 11 are provided in the transverse direction at the tip ends of the lateral side outer sides of the respective back side flaps 1bsf. As shown in Fig. 4, the fastening tapes 11 are attached to the target tape 15 (Figs. 2 and 3C) provided on the non-skin side surface of the front and rear waist regions 1a, And a pair of leg-hole openings HL and HL are formed in the diaper 1, and the diaper 1 is attached to the low-

The diaper 1 includes a substantially longitudinally elongated absorbent body 3 absorbing excreted liquid such as urine, a liquid permeable top sheet 2 covering the absorbent body 3 from the skin side, Impervious backsheet 4 covering the backsheet 4 from the non-skin side, a substantially hourglass-shaped outer sheet 5 forming an outer shape of the diaper 1, A pair of three-dimensional gathers 6, 6 are provided on the topsheet 2 in a pair in the transverse direction, and each of the transverse ends of the absorbent body 3 is provided with three-dimensional gathers 6g, 6g, 6).

As shown in Figs. 3A to 3C, the absorbent core 3 has an absorbent core 3c and a core wrap sheet 3rs covering substantially the entire outer peripheral surface of the absorbent core 3c. The absorbent core 3c is made of a liquid absorbent material such as pulp fibers or liquid absorbent granular material such as superabsorbent polymer (hereinafter also referred to as SAP), in an approximately hourglass shape (Fig. 2). For the core wrap sheet 3rs, a liquid pervious sheet such as a tissue paper or a nonwoven fabric is used. Spaces (3cna, 3cnb) in which the constituent material of the absorbent core (3c) such as pulp fibers do not exist are provided in predetermined shapes at both end portions in the longitudinal direction of the absorbent core (3c) .

The topsheet 2 is formed of a nonwoven fabric such as an air-through nonwoven fabric and has a planar dimension protruding from both sides in the longitudinal direction and both sides in the transverse direction of the absorbent body 3 as shown in Figs. 2 and 3A to 3C . The perforated sheet 4 also has a planar dimension protruding from both sides in the longitudinal direction and both sides in the transverse direction of the absorber 3, and is formed of a resin film such as a polyethylene film. The two sheets 2 and 4 are joined to each other by adhesion or welding at portions protruding from the absorber 3 in the longitudinal direction and the transverse direction, (3) is held.

2, the outer sheet 5 is formed of a suitable non-woven fabric or the like, and forms an outer shape of the diaper 1. As shown in Fig. The absorber 3 held between the both sheets 2 and 4 and between the sheets 2 and 4 on the skin-side surface of the outer sheet 5 has a central position in the transverse direction, (Fig. 3A to Fig. 3C). In this integrated state, the absorber 3 is extended across the abdomen side portion 1a, the crotch lower portion 1m, and the back side portion 1b (Fig. 2).

The three-dimensional gathers 6 and 6 are provided so as to correspond to the respective end portions 2e and 2e so as to cover the lateral ends 2e and 2e of the topsheet 2 from the skin side. Each of the sheets 6 and 6 forms a three-dimensional gathers 6g and 6g extending along the longitudinal direction from the skin-side surface of the topsheet 2, respectively. In other words, a plurality of thread rubbers 6r, 6r along the longitudinal direction are fixed to the inner side edge of the three-dimensional gathers 6 in the transverse direction by adhesion or the like in the longitudinal direction in the longitudinal direction, And the copper sheet 6 is fixed to the top sheet 2 at a predetermined position P6g outside the edge in the lateral direction as a fixed position. Therefore, when the stretching state of the thread rubber 6r is relaxed, the inner edge of the three-dimensional gathers sheet 6 and the vicinity thereof shrink in the longitudinal direction due to the force of the thread rubber 6r to shrink, The edge of the inner side and the vicinity thereof quickly rise from the skin side surface of the topsheet 2, thereby forming the solid gath 6g.

As shown in Figs. 2 and 3A to 3C, the three-dimensional gathersized sheet 6 is extended to the outer side in the lateral direction to substantially the same position as the outer edge of the outer sheet 5, And is integrally bonded or welded to the outer sheet 5 at the edge or the vicinity thereof. As a result, the three-dimensional gathers 6 and the outer sheet 5 are jointed to each other so that the bosomal side portion 1a and the back side portion 1b are covered with the bosomal side flaps 1asf and 1asf, Side flaps 1bsf and 1bsf are formed. On the other hand, also in the crotch lower portion 1m, the three-dimensional gatheried gathers 6 and the outer sheet 5 are integrally formed by bonding or welding at the end edge or the vicinity thereof, And leg flaps 1mf and 1mf are formed over a predetermined range on the inner side.

Each of the leg flaps 1mf and 1mf is a portion which becomes the leg-hole opening portion HL in the mounted state, that is, a portion that covers the leg circumference of the low- In order to form the leg gathers by contracting the respective leg flaps 1mf in the longitudinal direction, each leg flap 1mf is provided with a leg-like elastic member 21 in the form of a strip- And is fixed by adhesion or the like in a stretched state. Accordingly, when the elasticity of the elastic members 21 is relaxed, the leg flaps 1mf contract in the longitudinal direction to form a plurality of wrinkles, and the wrinkles become the leg gathers.

In this example, as shown in Fig. 3B, the leg-hole elastic members 21 are inserted between the outer sheet 5 and the three-dimensional gathers 6, but are not limited thereto at all. For example, it may be adhered to the non-skin side surface of the outer sheet 5, or may be adhered to the skin side surface of the three-

In this example, the belt-like elastic sheet is formed of a stretchable nonwoven fabric (a nonwoven fabric including elastomer fibers such as urethane fibers and having stretchability based on the elasticity thereof), but is not limited thereto at all. That is, if the sheet is stretchable based on its own elasticity without depending on the roll or flat rubber, it may be a sheet other than the elastic sheet. For example, a stretchable film (including an elastomer, Film having stretchability) may be used.

As shown in Figs. 2 and 3A, the fastening tapes 11 and 11 are provided at the leading ends of the pair of back side flaps Ibf and Ibf, respectively. Each of the fastening tapes 11 has a horizontally elongated band-like sheet made of a nonwoven fabric as a tape base material 11a and one end in the transverse direction of the tape base material 11a serves as a front end portion of the isoside flap 1bsf And the other end protrudes outward in the lateral direction from the tip end of the back side flap 1bsf.

A male member 11m of the surface fastener (corresponding to the male engaging portion) is fixed to the skin side surface of the protruding portion. A plurality of female engaging projections (Not shown). Therefore, the fastening tape 11 is caught on the target tape 15 by the engagement protrusion of the male member 11m being caught by the non-skin side surface of the target tape 15. [ As the surface member 11m, a known surface fastener can be applied. For example, the engagement protrusion can be suitably used in the form of a fishing needle or a T-shaped member.

As shown in Figs. 2 and 3C, the target tape 15 (corresponding to the target area) is provided on the non-skin side surface of the outer sheet 5, which is the non-skin side surface of the abdomen side portion 1a. In this example, the copper tape 15 has a rectangular shape elongated transversely, and the target tape 15 is adhered to the outer sheet 5 by the adhesive or welding while adjusting the central position of the transverse direction with respect to each other, And is fixed to the seat 5. In this example, a horizontally elongated rectangular through-air nonwoven fabric having a basis weight of 25 (g / m < 2 >) or more is used for the target tape 15 so as to increase the engagement force with the fastening tape 11. In this way, a hooking force of a required size is secured. As a standard of the clamping force necessary for proper clamping, 0.1 (g / 10 mm) or more can be exemplified. The method of measuring the engagement force will be described later.

Incidentally, the material of the target tape 15 is not limited to the above-described air-through nonwoven fabric. That is, the nonwoven fabric other than the above-described air-through nonwoven fabric may be used as long as the engaging force of the same size as that of the water member 11m of the fastening tape 11 can be secured. Alternatively, Alternatively, a female member of a known surface fastener such as a loop member may be used. In other words, when the outer sheet 5 is a nonwoven fabric, the outer sheet 5 may be used as a target tape, and the dedicated target tape 15 may be omitted.

When the diaper 1 is to be attached to the underweight child, the pair of fastening tapes 11, 11 are stretched to both sides in the transverse direction with the pair of fastening tapes 11, To the target tape 15, respectively. In this connection, in this example, the tape base material 11a further protrudes to the outside in the transverse direction with respect to the male member 11m, and the protruding portion 11ap extends in the width direction of the fastening tape 11, And functions as the grip portion 11ap.

As described above, the basic configuration of the diaper 1 has been described. However, in the present embodiment, the above-mentioned problem (the problem of restraining the backing tape 11 from being rolled up and falling down and bringing the back side portion 1b into close contact with the back, etc.) And has made some efforts to solve the problem. This will be described below.

5 is a schematic plan view of the developed state as shown in Fig. 2 as an explanatory diagram of the design. The first design relates to an elastic member which imparts elasticity to the waist-hole (HB). That is, although not described in detail, in this example, in order to impart stretchability to the waist-hole HO, the back side portion 1b is provided with a rectangular belt-like elastic sheet 31 (hereinafter, A portion corresponding to the waist-hole HB in the back side portion 1b is contracted in the transverse direction in a natural state in which no external force acts on the back side portion 1b. More specifically, the elastic sheet 31 extends on both sides in the transverse direction, and the copper sheet 31 is stretched in the transverse direction on the skin side and the non-skin side in the thickness direction of the copper sheet 31 3, 4, 5, and 6 adjacent to each other by welding or welding. Therefore, when the elongated state is relaxed to a natural state, the portion of the back side portion 1b fixed to the elastic sheet 31 is contracted in the transverse direction to form a plurality of corrugations. Therefore, until such wrinkles are elongated, the elastic elastic sheet 31 can be rapidly extended in the transverse direction, whereby the waist-hole opening portion HB is in a state of being stretched.

As can be seen from Figs. 5 and 3A, the non-skin side and the skin side adjacent to the skin 2, 3, 4, 5 , 6) are different depending on the angular positions in the lateral direction and the longitudinal direction, respectively. For example, as shown in Fig. 3A, since the perforated sheet 4 exists at the position on the center side in the transverse direction on the non-skin side in the thickness direction, it is fixed to the perforated sheet 4 at the same position . However, since the perforated sheet 4 does not exist at the position on each side in the transverse direction, the elastic sheet 31 is fixed to the outer sheet 5. 5 and 3A, since the absorber 3 is present at the position on the center side in the transverse direction and the center side in the longitudinal direction on the skin side in the thickness direction, As shown in FIG. However, it is fixed to the three-dimensional gathersheet 6 at the position of each side in the transverse direction in which the absorber 3 is not present and is fixed to the topsheet 2, and there is also no topsheet 2.

5, the elastic sheet 31 is extended to both sides in the lateral direction at least to the vicinity of the respective fastening tapes 11, 11 in the unfolded state of the diaper 1 as shown in Fig. 5 The end portions 31e1 and 31e1 in the transverse direction of the elastic sheet 31 are positioned at the ends 21e2 and 21e2 in the longitudinal direction of the nearest perimeter elastic members 21 and 21, Or in the transverse direction with respect to the transverse direction.

The end portions 31e1 and 31e1 of the waist elastic sheet 31 are hardly affected by the forces generated in the elastic members 21 of the leg-holes, , It is possible to quickly apply the force to be contracted to the nearest fastening tapes 11, 11 as the transverse tensile force, respectively. As a result, a transverse shearing force is applied to the male member 11m of the fastening tape 11, so that the male screw member 11m can be fastened to the target tape 15 of the double- As a result, the fastening tape 11 can be effectively restrained from falling or falling.

5, the fastening tapes 11 and 11 are unfastened from the fastening tape 11 to the target tape 15 so that the abdomen side portion 1a and the crotch lower portion 1m are engaged with each other, The elastic member 21 and the shoulder portion 1b are arranged in parallel to each other in the longitudinal direction and the portion corresponding to the waist opening portion HB based on the elastic member 31 is contracted, The diaper 1 is stretched in both the longitudinal direction and the transverse direction until the shrinkage of the pair of leg flaps 1mf and 1mf based on the elastic members 21 and 21 is completely eliminated.

5, the waist elastic sheet 31 is arranged in the longitudinal direction in the longitudinal center position C11m of the water member 11m of the fastening tape 11. More specifically, the center position C11m in the longitudinal direction of the male member 11m of one fastening tape 11 and the center position C11m of the male member 11m of the other fastening tape 11 And the elastic sheet 31 at all positions in the transverse direction of the elastic sheet 31. [ Therefore, the elastic sheet 31 can transmit the force to shrink to each of the fastening tapes 11, 11 in a substantially uniform distribution with less deflection in the longitudinal direction, and this is also effective in suppressing the above-mentioned tilting and falling .

In order to increase the effect, the ratio of the overlap in the longitudinal direction between the male member 11m and the elastic sheet 31 (the overlap amount LOL (in the longitudinal direction between the male member 11m and the elastic sheet 31) mm) is divided by the maximum dimension L11m in the longitudinal direction of the male member 11m) to be 70% or more.

Since the waist elastic sheet 31 is an elastic film containing a suitable elastomer resin, the sheet 31 itself has elasticity. Therefore, as compared with the case of using a plurality of gypsum or flat rubber, a tensile force can be applied to the fastening tape 11 with a substantially uniform distribution with less deflection in the longitudinal direction, and this is also effective in suppressing the above- .

In addition, with respect to the gap G that can be formed in the positioning posture shown in Fig. 1A, that is, the gap G that can be formed between the back side portion 1b of the diaper 1 and the like, , And is reduced based on the force of the flexible elastic sheet (31) to contract. Therefore, the back side portion 1b of the diaper 1 can be brought into close contact with the back of the low-

Although the first design has been described above, this first design is an essential design in the diaper 1 of the present invention. On the other hand, the inventions described below are not essential, but the above-mentioned problems can be solved more effectively. For this reason, the diaper 1 of the present embodiment is also designed as follows.

5, each of the transverse end portions 31e1 of the elastic members 31 is located closest to the transversely opposite end portions 31e1e of the end portions 31e1, And is connected to the fastening tape 11.

Therefore, the force to shrink the end portion 31e1 can be applied to the fastening tape 11 quickly and reliably. This also effectively contributes to suppressing the above-mentioned tilting and falling.

5, when viewed in the thickness direction, the waist elastic sheet 31 is laid over both the absorbent body 3 and the anti-impervious sheet 4, and in this case, The transversely opposite end portions 31e1 and 31e1 of the waist elastic sheet 31 are positioned at the same positions as the lateral edges of both the absorbent body 3 and the imperforate sheet 4, As shown in Fig.

Therefore, at least at each of the end portions 31e1 and 31e1 of the elastic members 31, when the fastening tapes 11 and 11 are pulled to both sides in the transverse direction for attaching the diaper 1, And the counterbored sheet 4 without being subjected to a large resistance force. As a result, after the fastening tape 11 is fastened to the target tape 15, the force to contract the fastening tape 31 is applied to the fastening tape 11 as a tensile force in the transverse direction, And this also effectively contributes to suppressing the above-mentioned tilting and dropping.

5, the absorber 3 is provided with a low-rigidity portion 3nb (equivalent to an isosceles low-rigidity portion) having a stiffness lower than that of the surrounding portion in correspondence with the position of the back side portion 1b, Lt; / RTI > That is, in this example, at the center position in the transverse direction in the longitudinally equilateral side end portion of the absorbent core 3c, the absorbent core 3c, A triangular space 3cnb is formed. Thus, the absorber 3 is formed with the above-described low-rigidity portion 3nb. The low-rigidity portion 3nb overlaps with the waist elastic sheet 31 when viewed in the thickness direction.

Therefore, when the fastening tapes 11 and 11 are pulled to both sides in the transverse direction at the time of attaching the diaper 1, at least the low-rigidity portion 3nb of the absorbent body 3 is quickly reduced in the transverse direction, The low-rigidity portion 3nb does not have a large resistance. Thus, the waist elastic sheet 31 can be stretched with a relatively small tensile force, and as a result, it is possible to easily generate a force to shrink the waist elastic sheet 31.

However, the portion of the absorbent core 3c corresponding to the low-rigidity portion 3nb is not limited to the space 3cnb described above at all. The absorbent core 3c is formed on the portion of the absorbent core 3c corresponding to the low rigidity portion 3nb so that the absorbency of the absorbent core 3c can be reduced, May be somewhat present.

5, the absorber 3 is provided with a low-rigidity portion 3na (corresponding to the low-side low-rigidity portion) having a stiffness lower than that of the surrounding portion in correspondence with the position of the front- Lt; / RTI > That is, in this example, the upper side and the lower side are substantially trapezoidal in plan view along the lateral direction at the center position in the transverse direction on the end portion on the bather side in the longitudinal direction of the absorbent core 3c, Shaped space 3cna is formed in the absorber 3. Thus, the absorber 3 has the low-rigidity portion 3na formed thereon. The low-rigidity portion 3na overlaps the target tape 15 when viewed in the thickness direction.

6, the engagement positions of the respective water members 11m, 11m of the fastening tapes 11, 11 caught on the target tape 15 at the time of attaching the diaper 1 are set so that the fastening tapes 11, The low stiffness portion 3na easily expands on the basis of the force to shrink the elasticity of the waist elastic sheet 31 when the portion 3na is in a position to sandwich the portion 3na from the both sides in the transverse direction. As the male member 11m moves slightly in the lateral direction in accordance with the enlarging operation, the male member 11m can securely fit into the target tape 15, The engagement with the target tape 15 can be made stronger.

However, the portion of the absorbent core 3c corresponding to the low-rigidity portion 3na is not limited to the space 3cna described above at all. The absorbent core 3c is provided on the portion of the absorbent core 3c corresponding to the low rigidity portion 3na, May be somewhat present.

5, the planar shape of the male member 11m of the fastening tape 11 has a substantially rectangular shape, and accordingly, the longitudinal direction at the inner side position in the lateral direction (11ms). Since the leg-surrounding elastic member 21 is a band-like elastic sheet provided along the longitudinal direction, its outer shape is formed by a pair of long sides 21s2 and 21s2 along the longitudinal direction and a pair of short sides 21s1 , 21s1. A short side 21s1 located on the back side of the pair of short sides 21s1 and 21s1 and a rectangular area 21s2 on the opposite side of the lateral side 11ms of the water member 11m of the fastening tape 11, A part of the waist elastic sheet 31 is located in the region A11m21 (an area A11m21 shown in a dotted shape in Fig. 5). However, such a rectangular area A11m21 is formed by the elastic members 21, Is a transmission path through which force can be transmitted to the male member (11m)

Therefore, even if a force for pulling down the male member 11m from the leg-circumferential elastic member 21 to the leg-openings HL is transmitted, this force is transmitted to the waist elastic member 21 by the part of the waist elastic sheet 31 Is relieved and transmitted to the water member (11m), whereby it is possible to effectively suppress the falling of the fastening tape (11) due to the force.

7, the waist elastic sheet 31 has an effective portion 31a for contracting the waist-hole opening portion HB in the transverse direction, and a waist-hole elastic portion 31b for horizontally extending the waist- And ineffective portions 31n and 31n that do not shrink. The ineffective portions 31n and 31n are positioned at the transverse end portions 31e1 and 31e1 of the elastic member 31 and the ineffective portions 31n and 31n are located at the closest pass And is located between the nipping tape 11 and the effective portion 31a. The ineffective portions 31n and 31n are in a natural length state in which no external force is applied and are in a state of a natural length.

Therefore, when the fastening tape 11 is stretched in the transverse direction, the ineffective portion 31n expands relatively easily and quickly. Then, the force to be contracted due to such elongation can be quickly applied to the fastening tape 11 as a tensile force in the transverse direction. Therefore, the male member 11m of the fastening tape 11 can be fastened to the target tape 15 of the double-side portion 1a by a suitable fastening force.

In this example, as shown in Fig. 8, the pair of fastening tapes 11 and 11 are configured to be capable of being hooked in a " fastening tape superposition form ". Therefore, when the fastening tape is stacked, if necessary, the fastening tapes 11 and 11 can be gathered and attached to the central portion of the lateral side of the front side portion 1a at the time of installation , So that the fastening tapes 11 and 11 can be moved away from the M-shaped legs of the low- As a result, the above-mentioned pushing force F (Fig. 1B) given to the fastening tapes 11, 11 from the leg can be reduced, and the lifting and falling of the fastening tapes 11, .

The fastening tape 11 of the back side flap 1bsf located on the left side in Fig. 8 is referred to as " left tape 11-1 " (Equivalent to one tape), and similarly, the fastening tape 11 of the back side flap 1bsf positioned on the right side is referred to as the " right tape 11-2 (corresponding to the second tape) ".

8, the male member 11m of the skin side surface of the left tape 11-1 is hooked on the target tape 15 of the front side portion 1a while the right side tape 11-2 is engaged with the right side tape 11-2, Skin side surface 11-1s of the left-side tape 11-1, and the water member 11m on the skin side surface of the left-side tape 11-1 is placed on the non-skin side surface 11-1s of the left-side tape 11-1. That is, in the fastening tape overlapping mode, the non-skin side surface 11-1s (corresponding to the surface on the non-engaging portion side) of the left tape 11-1 is connected to the water member 11m of the right tape 11-2, As shown in Fig. Therefore, in this example, the non-skin side surface 11-1s of the left tape 11-1 is formed of a nonwoven fabric having a relatively large basis weight of, for example, 50 (g / m2) or more, The engaging force between the male member 11m of the right tape 11-2 and the non-skin side surface 11-1s of the left tape 11-1 is 0.1 N / 10 mm or more. Therefore, the water member 11m of the right-side tape 11-2 can be hooked to the non-skin-side surface 11-1s of the left-side tape 11-1 with a hooking force of a size required for the hooking, , And a fastening tape overlapping form is realized.

Here, it is preferable that the above-mentioned fastening tape superposition type is also as follows. That is, the engagement force (N / 10 mm) between the male member 11m of the left tape 11-1 and the target tape 15 and the engagement force of the male member 11m of the right tape 11-2 with the target tape 15 (N / 10 mm) between the non-skin side surface 11-1s of the left tape 11-1 and the water member 11m of the right tape 11-2, And the center position C11-1 in the longitudinal direction of the left tape 11-1 and the center position C11-2 in the longitudinal direction of the right tape 11-2 may be larger than the center position C11-1 of the right tape 11-2, When the right side tape 11-2 is placed on the non-skin side surface 11-1s of the left tape 11-1 while overlapping the water member 11m of the right tape 11-2, 2 of the left tape 11-1 and the right tape 11-1 are formed in such a shape that the male member 11m of the left tape 11-1 protrudes from the non-skin side surface 11-1s of the left tape 11-1 toward both sides in the longitudinal direction, -2) may be set.

For example, in the example of Fig. 8, the shapes of the left and right tapes 11-1 and 11-2 are the same, and concretely, And has a shape in which the tip with a smaller dimension in the longitudinal direction is narrowed. Therefore, while the left tape 11-1 and the right tape 11-2 are aligned so that the center positions C11-1 and C11-2 in the longitudinal direction of the tape 11-1 match each other, When the water member 11m of the right tape 11-2 is overlaid on the non-skin side surface 11-1s and the water member 11m of the right tape 11-2 is engaged with the water member 11m of the right tape 11-2, At both sides in the longitudinal direction from the left tape 11-1 at the position P11-2n on the base side of the right tape 11-2.

With this configuration, it is possible to easily detach the right-side tape 11-2 from the left-side tape 11-1 in the form of the fastening tape, It can be made stronger. The details are as follows.

First, as described above, in this example, the engagement force (N / 10 mm) between the male member 11m of the left-side tape 11-1 and the target tape 15 is set to the non-skin side (N / 10mm) between the surface 11-1s and the water member 11m of the right tape 11-2. Therefore, when the grip portion 11ap of the distal end portion of the right tape 11-2 is gripped and the copper tape 11-2 is removed from the left tape 11-1, It is possible to effectively prevent detachment of the right tape 11-2 from the tape 15 and thus only the right tape 11-2 can be removed from the left tape 11-1 on the stable left tape 11-1 . As a result, the fastening tapes 11-1 and 11-2 can be easily removed from the left-side tape 11-1 in the replacement of the diaper 1. Therefore, It is possible to prevent the low-weighted child 101 from being subjected to a great stress, thereby contributing to the minimization of handling.

As described above, in the fastening tape overlapping manner, the water member 11m of the right tape 11-2 is positioned at the position P11-2n on the root side of the right tape 11-2 in the lateral direction , It is protruded to both sides in the longitudinal direction from the left tape 11-1. The sticking force (N / 10 mm) from the target tape 15 is applied to the left tape 11-1, Skin side surface 11-1s and the engaging force (N / 10mm). Therefore, the hooking force of the male member 11m of the right-side tape 11-2 can be increased by the portion that is exposed.

Incidentally, the measurement of the clamping force (N / 10 mm) is performed as follows, for example, using an autograph tester AG-X10plus (manufactured by Shimadzu Corporation) as an example of a tensile tester. 9 is a schematic side view showing a state of the measurement.

A part of the sample 11s is cut out from the fastening tape 11 of the diaper 1 so that a rectangular sample 11s having the same shape as the tape base 11a and the water member 11m Quot; fastening tape sample 11s "). A part of the sample 15s of the target tape 15 is cut out from the target tape 15 of the diaper 1 to form a sample 15s (hereinafter, referred to as a target tape sample 15s). At this time, The target tape sample 15s is made larger in both the longitudinal direction and the transverse direction than the tape sample 11s.

Then, the water member 11m of the fastening tape sample 11s is hooked on the non-skin side surface of the target tape sample 15s, thereby to generate the measurement sample 11s15s. However, in this engagement, the horizontal direction of the target tape sample (15s) is aligned in parallel with the target tape sample (15s) while alignment of the fastening tape sample (11s) The fastening tape sample 11s is placed on the non-skin side of the rollers 15s and 15s, and then the weight of the rollers 700g, not shown, is applied to both samples 11s and 15s, To a speed value of 5 (mm / min). As a result, both samples 11s and 15s are in a predetermined hooked state.

On the other hand, as shown in Fig. 9, the tensile tester has a pair of heads 81u and 81d which can be moved in the vertical direction. Specifically, one of the heads 81u is a movable head 81u which can move up and down in the vertical direction, and the other head 81d is a fixed head 81d provided so as not to move downwardly of the moving head 81u. to be. The fixed head 81d has a flat inclined surface 81ds on the upper surface and the inclined surface 81ds is inclined by 135 占 from the vertical direction.

Then, the aforementioned sample for measurement 11s15s is fixed to the inclined surface 81ds. Further, during this fixing, the target tape sample 15s side is brought into surface contact with the slope surface 81ds so that the fastening tape sample 11s is positioned above the target tape sample 15s. The lateral direction of each of the samples 11s and 15s is arranged so as to follow the inclined direction of the inclined surfaces 81ds in parallel. The lower edge 11sde of the fastening tape sample 11s in the oblique direction is formed with a wave formed in a size protruding from the lower end edge 11sde in the longitudinal direction (in the direction passing through the paper surface in Fig. 9) One end of the supporting sheet 83 is fixed and the other end of the supporting sheet 83 is gripped by the holding portion 81uc of the moving head 81u.

Then, while the load value N acting on the moving head 81d is measured by a load cell (not shown) provided in the fixed head 81d, the moving head 81u is moved to a constant moving speed value of 300 (mm / So that the moving head 81u is moved away from the fixed head 81d.

Then, the fastening tape sample 11s is sequentially removed from the target tape sample 15s, and the fastening tape sample 11s is removed from the moving head 81u through the holding auxiliary sheet 83, The load value P135 when the angle? Between the direction of the releasing force Fh applied to the upper surface 11s and the inclined direction of the inclined surface 81ds becomes 135 占 is recorded. Then, the recorded load value P135 is converted into a load value in the case where the dimension in the longitudinal direction of the fastening tape sample 11s is 10 mm, and the converted value is obtained as the above-mentioned engaging force (N / 10 mm). For example, when the longitudinal dimension of the fastening tape sample 11s is 20 mm, the value obtained by dividing the recorded load value P135 by 20 mm by 10 mm (= (P135 / 20 mm) x 10 mm (N / 10 mm).

In addition, the engagement force in the case of the fastening tape superposition type, that is, the engagement force between the non-skin side surface 11-1s of the left tape 11-1 and the water member 11m of the right tape 11-2 (N / 10 mm) can also be measured in the same manner as described above, so that the description thereof will be omitted.

However, in the above description, the diaper 1 of the present embodiment is described as being specialized for a low birth weight child of 3000 grams or less. However, the diaper 1 can effectively solve the above-mentioned problems accompanying the positioning posture and the minimum handling It is considered that the diaper 1 of the present embodiment is more effective when it is more likely to become a positioning posture and further requires minimal handling. Such a case is a case where the body weight is lower.

Therefore, the diaper 1 of the present embodiment is preferably used for less than 2,500 grams to 1,500 grams or less of low birth weight, more preferably 1,500 grams to 1,000 grams for extremely low birth weight infants, Preferably less than 1000 grams.

Further, since the diaper 1 of the present embodiment is specialized for low birth weight infants, it is formed to be smaller than the existing diaper for newborn baby 1. For example, in the diaper 1 of the present embodiment, the length of the product of the newborn infant diaper is 365 mm and the circumferential length LHB of the waist-hole opening HB in the attached state is 304 mm, L1) (Fig. 2) is 210 mm to 330 mm, and the peripheral length LHB of the waist-opening HB in the mounted state is 160 to 295 mm.

The product length L1 is the maximum dimension L1 in the longitudinal direction in the above-described expanded state. The circumferential length LHB of the waist-hole HO is measured with the fastening tapes 11-1 and 11-2 in a fastened tape overlapping state. The details are as follows.

First, as shown in Fig. 8, after the water member 11m of the left tape 11-1 is connected to the target tape 15 of the side portion 1a, the water member 11m of the right tape 11-2 Skin side surface 11-1s of the left tape 11-1 but at this time the center positions C11-1 and C11 And the front end 11-2e of the right tape 11-2 is aligned so as to be aligned with the base end 11me of the water member 11m of the left tape 11-1 . As a result, the fastening tape overlapping state is established.

Then, the waist-hole opening HB formed based on the engaged state is stretched until the shrinkage based on the waist elastic sheet 31 is completely eliminated. In this stretched state, the circumferential length LHB of the waist-hole HB is measured, whereby the circumferential length LHB is obtained.

In addition, the product length L1 of the low birth weight infant and the circumferential length LHB of the waist-hole opening HB are 310 mm and 273.5 mm, respectively, and the product length L1 and the waist- And the circumferential length LHB of the body-side opening HB are 230 mm and 219 mm, respectively.

=== Other Embodiments ===

Although the embodiments of the present invention have been described above, the above embodiments are for the purpose of facilitating understanding of the present invention, and are not intended to limit the present invention. It is needless to say that the present invention can be changed or improved without departing from the gist of the present invention, and equivalents thereof are included in the present invention. For example, the following modifications are possible.

In the above-described embodiment, the elastic band-like elastic member 21 is exemplified as the band-like elastic sheet along the straight line in the longitudinal direction. However, the shape of the band-like elastic sheet is not limited to the above. For example, it may be a curved shape that is displaced inward in the lateral direction as it progresses from the back end toward the inside in the longitudinal direction.

In the above-described embodiment, the elastic film is exemplified as the waist elastic sheet 31, but the elastic sheet is not limited thereto at all. That is, if the sheet 31 itself has elasticity, it may be a sheet-like member other than the elastic film. For example, a stretchable nonwoven fabric (including nonwoven fabric including elastomeric fibers such as urethane fibers, ).

1: Disposable diaper 1a:
1 asf: side flap 1b: back side
1bsf: Side flap (end) 1m: Crotch underneath
1mf: leg flap 2: top sheet
2e: end 3: absorber
3na: Low-stiffness part (low-stiffness part)
3nb: low-stiffness portion (low-stiffness portion on the back side) 3c: absorbent core
3cna: space 3cnb: space
3rs: core wrap sheet 4: anti-seated sheet
6: Three-dimensional gathersheet 6g: Three-dimensional gathers
6r: thread rubber 11: fastening tape
11a: tape base 11ap: protruding portion (grip portion)
11m: male member (engaging member) 11me: end
11ms: Side 11-1: Left tape (first tape)
11-1s: non-skin side 11-2: right side tape (second tape)
11-2e: leading edge 11s: fastening tape sample
11sde: bottom edge 11s15s: sample
15: target tape 15s: target tape sample
21: leg-surrounding elastic member 21e1:
21e2: end 21s1: short side
21s2: long side 31: waist elastic sheet
31e1: end 31e1e: outer end
31a: valid part 31n: invalid part
81u: moving head 81uc: grip section
81d: fixed head 81ds: inclined surface
83: Supporting support sheet 101: Low birth weight infant
HB: waist opening HL: leg opening
P6g: Fixed position A11m21: Rectangular area
C11m: Center position C11-1: Center position
C11-2: Center position P11-2n: Position on the source side
LNC11m: Segment G: Clearance
F: Pushing force Fh: Peeling force

Claims (8)

A crotch portion (lower crotch portion) disposed in a crotch region of the low-birth weight infant and a crotch lower portion (crotch lower portion) disposed on the back side of the low- The back side portions arranged along the lateral direction are arranged side by side in the longitudinal direction orthogonal to the lateral direction,
And a pair of leg-hole openings and a pair of leg-hole openings are formed by fastening the end portions to the abdomen side portions through fastening tape fastening portions provided at the respective end portions in the transverse direction of the back side portion As an expandable disposable diaper,
And leg-surrounding elastic members provided along the longitudinal direction at respective angular positions on both sides in the lateral direction in the crotch portion and for contraction of the leg-openings along the longitudinal direction,
And a waist elastic sheet extending from both sides of the back side in the back side to shrink the waist opening in the transverse direction,
The lateral edges of the waist elastic sheet in the deployed state of the diaper are positioned at the same positions with respect to the transverse direction in the transverse direction with respect to the position of the end of the longitudinally- The longitudinal direction of the fastening tape is located at the outer side in the transverse direction with respect to the longitudinal direction of the fastening tape, Of the disposable diaper for a low birth weight infant of 3000 grams or less. The method according to claim 1,
Wherein the end portion of the waist elastic sheet is connected to the nearest fastening tape at an outer end portion of the end portion in the transverse direction. 3. The method according to claim 1 or 2,
The direction orthogonal to both the longitudinal direction and the transverse direction is along the thickness direction of the diaper in the deployed state,
An absorbent body extending along the longitudinal direction over the abdomen side portion, the crotch lower side portion and the back side portion, and a leakage preventing sheet for covering the absorber from the non-skin side in the thickness direction,
Wherein the waist elastic sheet is overlapped with both of the absorbent body and the anti-glare sheet when viewed in the thickness direction, and each of the transverse end portions of the waist elastic sheet is in contact with the absorbent body and the through- Wherein the disposable diaper is positioned at the same position as the position of the transverse end edge of the sheet, or is positioned outside the transverse direction. 4. The method according to any one of claims 1 to 3,
Wherein the absorbent body has an isosceles low-rigidity portion having a lower rigidity than that of the surrounding portion,
Wherein the isoscelestone low-rigidity portion overlaps with the waist elastic sheet when viewed in the thickness direction. The disposable diaper according to Claim 1, 5. The method according to any one of claims 1 to 4,
Wherein the abdomen side portion has a target region for engaging the engaging portions of the fastening tape at the respective end portions of the back side portion,
Wherein the absorber has a bifurcated low stiffness portion having a stiffness lower than that of the surrounding portion in correspondence with the position of the abdominal side portion,
Wherein the double-sided low-stiffness portion overlaps with the target region when viewed in the thickness direction. 6. The method according to any one of claims 1 to 5,
Wherein the fastening tape has a shape in which the engaging portion has a side at an inner side position in the transverse direction,
The elastic member is a band-like elastic sheet having a pair of long sides along the longitudinal direction and a pair of short sides along the lateral direction,
Wherein a portion of the waist elastic sheet is divided into a rectangular region defined by a short side located on the back side of the pair of short sides and an inner side in the transverse direction of the fastening tape on the fastening tape, Wherein the disposable diaper is made of a synthetic resin. 7. The method according to any one of claims 1 to 6,
Wherein the waist elastic sheet has an effective portion that contracts the waist-hole opening in the transverse direction and an invalid portion that does not shrink the waist-hole opening in the transverse direction,
Wherein the ineffective portion is located at each end in the transverse direction of the waist elastic sheet and is located between the fastening tape and the effective portion. Disposable diapers. 8. The method according to any one of claims 1 to 7,
Wherein the fastening tape at one end of each of the ends is used as a first tape and the fastening tape at the other end is used as a second tape and the latching portion of the first tape is hooked to the stitching portion, The engaging portion of the first tape and the surface of the non-engaging portion of the first tape are overlapped with each other on the side of the non-engaging portion of the first tape, (N / 10 mm) between the engaging portion and the abdomen side portion of the first tape and the engaging force (N / 10 mm) between the engaging portion and the abdomen side portion of the second tape, (N / 10 mm) between the surface of the first tape on the non-engaging portion side and the engaging portion of the second tape, respectively,
And the second tape is positioned on the side of the non-engaging portion of the first tape while being aligned such that the center position of the first tape and the center position of the second tape match, The first tape and the second tape are set in a shape in which the engaging portion of the second tape comes out from both sides of the first tape in the longitudinal direction when the engaging portion is overlapped and hooked Disposable disposable diapers for underweight babies up to 3000 grams.

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