TW201607515A - Unfolding-type disposable diaper for infants weighing 3000 grams or less at birth - Google Patents

Abstract

An unfolding-type disposable diaper for infants weighing 3000 grams or less at birth, said diaper having leg-surrounding elastic members for constricting leg-surrounding openings in the longitudinal direction, the leg-surrounding elastic members each being provided in the longitudinal direction in positions on both sides in the transverse direction in a crotch section. A back-side section has a waist-surrounding elastic sheet for constricting a waist-surrounding opening in the transverse direction, the waist-surrounding elastic sheet being provided so as to extend to both sides in the transverse direction. When the diaper is unfolded, end sections in the transverse direction of the waist-surrounding elastic sheet are positioned with respect to the transverse direction at the same positions as end sections on the back side in the longitudinal direction of the leg-surrounding elastic members nearest thereto, or are positioned further outside in the transverse direction relative to the end sections of the leg-surrounding elastic members nearest thereto, and the waist-surrounding elastic sheet is disposed astride longitudinal center positions of engaging sections of fastening tapes in the longitudinal direction.

Description

Disposable disposable diapers for low-weight children under 3 kg

The present invention relates to a disposable diaper for a low-weight child-expanding type of 3 kg or less.

In the past, unfolded disposable disposable diapers have been known. The disposable diaper has a belly shape, a crotch portion, and a back side portion arranged in the longitudinal direction and has a substantially hourglass-like planar shape. Further, each of the tightening bands provided at both end portions in the lateral direction of the back side portion is locked to the target belt at the abdominal side portion, thereby forming an opening portion around the crotch and a pair of opening portions around the leg for use. The subject wears.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-253608

On the other hand, there are low birth weight children born with a low body weight of 3 kg or less. Moreover, the low-weight child may spend most of his time in the fetal-buckling posture when he is in the mother's body after birth. Fetal The curved posture is also called a positioning posture, and as shown in FIG. 1A, the posture is collapsed in a C-shape on the side, and it is appropriately safely disposed by sleeping on a round seat (not shown). And become a prone position. In addition, although it is possible to appropriately perform posture exchange for tilting up, etc., most of the time is the prone posture. In addition, depending on the situation of low birth weight infant 101, based on the idea of avoiding unnecessary stress, it is possible to adopt the idea of minimizing the treatment of the body as far as possible. Moreover, such a low-weight child also uses a disposable disposable disposable diaper 1'.

Fig. 1B is a view showing the arrow B-B in Fig. 1A, in which the feet of the low-weight child 101 are opened in an M shape in the posture, and the knees are in a state close to the abdomen. Therefore, the tightening band 11' which is locked to the target belt 15' of the front side portion 1a' is pushed up from the side of the opening HL' of the foot and the thigh to the side of the opening portion HB' around the crotch. In addition, since most of the time is spent in the posture, the urging force F continues to act for a long time. As shown in the schematic side view of Fig. 1C, the belt 11' is gradually rolled up from the side of the opening HL' of the foot to the side of the opening HB of the weir (see the dot in Fig. 1C), and finally the detachment is caused. Moreover, in the case of detachment, the tightening band 11' must be re-fixed, at which time the low-weight child 101 has to be contacted, and the minimum treatment is violated.

Further, as described above, in the posture, the posture is a C-shaped prone posture, and in this posture, since the back is collapsed like in FIG. 1A, it will be on the back and the back side portion 1b' of the disposable diaper 1'. A gap G is created between them. In this way, in order to reduce the gap G, it is necessary to re-wear the disposable diaper 1', and as a result, the low-weight child 101 has to be contacted in the same manner as described above. And violate the minimum processing.

The present invention has been developed in view of the above-described conventional problems, and an object of the present invention is to provide a disposable diaper for a low-weight child-expanding type of 3 kg or less, which can be fastened to the ventral side. The rolling up and detachment from the front side portion is suppressed, and the back side portion of the disposable diaper is brought into close contact with the back.

In order to achieve the above-mentioned object, the present invention is a disposable diaper for a low-weight child-expanding type of 3 kg or less, which has a ventral side of a ventral side of a low-weight child placed in a lateral direction of 3 kg or less. a lower portion of the crotch disposed between the crotch of the low-weight child and a back side portion disposed on the back side of the low-weight child along the lateral direction, and the abdominal portion, the crotch portion, and the back portion are along the lateral direction Arranging in the longitudinal direction orthogonal to the direction, and passing through the locking portions of the tightening belts respectively provided at the respective end portions of the back side portion in the lateral direction, the respective end portions are respectively locked to the front side portion, thereby forming An opening around the crotch and a pair of openings around the foot, characterized in that the elastic member around the foot is provided at each of the two sides of the crotch portion in the lateral direction along the longitudinal direction. The opening around the foot is contracted in the longitudinal direction; and has an elastic sheet surrounding the crucible, which is provided on the back side portion and extends toward both sides in the lateral direction for shrinking the opening around the crucible in the lateral direction In the expanded state of the diaper, the respective end portions of the lateral direction of the elastic sheet surrounding the barrel, are located in the back and around the longitudinal direction of the elastic member closest to the foot The position of the end portion of the side is the same position in the lateral direction or the outer side in the lateral direction, and the elastic sheet around the crucible is disposed so as to straddle the card of the tightening belt in the longitudinal direction with respect to the longitudinal direction. The central position of the stop in the longitudinal direction.

Other features of the present invention will become apparent from the description of the specification and appended claims.

According to the present invention, it is a disposable disposable diaper for a low-weight child-expanding type of 3 kg or less, which can suppress the rolling up and detachment of the tightening band that is locked to the ventral portion from the ventral portion. The back side of the disposable diaper is brought into close contact with the back.

1‧‧‧Disposable disposable diapers

1a‧‧‧ Ventral side

1asf‧‧‧Face

1b‧‧‧Back side

1bsf‧‧‧Flanking piece (end)

1m‧‧‧胯 lower part

1mf‧‧‧ leg flaps

2‧‧‧Top sheet

2e‧‧‧End

3‧‧‧ absorber

3na‧‧‧Low-rigid part (ventral low-rigidity part)

3nb‧‧‧Low rigid part (low back rigid part)

3c‧‧‧Absorbent core

3cna‧‧‧ space

3cnb‧‧‧ space

3rs‧‧ ‧ core coated sheet

4‧‧‧ leakproof sheets

5‧‧‧Outer sheets

6‧‧‧Three-dimensional hem sheets

6g‧‧‧Three-dimensional hem (leak-proof wall)

6r‧‧‧Rubber line

11‧‧‧ tightening belt

11a‧‧‧With substrate

11ap‧‧‧ highlight (grab)

11m‧‧‧ public materials (locking part)

11me‧‧‧

11ms‧‧‧ side

11-1‧‧‧Left belt (1st belt)

11-1s‧‧‧ non-muscle side

11-2‧‧‧Right belt (2nd belt)

11-2e‧‧‧ front end

11s‧‧‧ tightening tape sample

11sde‧‧‧Lower edge

11s15s‧‧‧Measurement sample

15‧‧‧Target belt

15s‧‧‧ target tape sample

21‧‧‧ elastic members around the foot

21e1‧‧‧End of the back side

21e2‧‧‧ end

21s1‧‧‧ Short side

21s2‧‧‧ long side

31‧‧‧胴elastic sheet around

31e1‧‧‧ end

31e1e‧‧‧Outer end

31a‧‧‧Efficient part

31n‧‧‧Invalid part

81u‧‧‧ moving head

81uc‧‧‧Control Department

81d‧‧‧Fixed head

81ds‧‧‧ sloped surface

83‧‧‧Auxiliary sheets for holding

101‧‧‧Low weight children

HB‧‧‧胴around opening

HL‧‧‧ opening around the foot

P6g‧‧‧fixed position

A11m21‧‧‧tetragonal area

Central location of C11m‧‧‧

C11-1‧‧‧Central location

C11-2‧‧‧Central location

P11-2n‧‧‧ position on the root side

LNC11m‧‧‧ connection line

G‧‧‧ gap

F‧‧‧Pushing force

Fh‧‧‧ peeling force

Fig. 1A is a schematic side view of a low birth weight infant 101 in a posture, Fig. 1B is a view showing a BB arrow in Fig. 1A acting on the urging force F of the tightening belt 11', and Fig. 1C is a view showing a pushing force by Fig. 1C. F is a schematic side view of a state in which the tightening band 11' is rolled up.

Fig. 2 is a schematic plan view showing the unfolded state of the disposable disposable diaper 1 of the embodiment.

3A, 3B, and 3C are a cross-sectional view taken along the line A-A, a cross-sectional view taken along line B-B, and a cross-sectional view taken along line C-C in Fig. 2, respectively.

Fig. 4 is a schematic perspective view of the disposable disposable diaper 1 in a worn state.

Fig. 5 is an explanatory view showing another means of applying the disposable disposable diaper 1 of the embodiment, and is a schematic plan view showing the unfolded state of the disposable diaper 1.

Fig. 6 is an explanatory view showing a state in which the locking position of the tightening belts 11, 11 which are locked to the target belt 15 is located at a position where the low rigidity portion 3na of the absorbent body 3 is sandwiched from both sides in the lateral direction.

Fig. 7 is an explanatory view of the contraction effective portion 31a and the ineffective portion 31n which the elastic sheet 31 around the crucible has.

Fig. 8 is an explanatory view showing a state in which the tightening belts 11, 11 in a state in which the tightening belts 11, 11 are overlapped with each other.

Fig. 9 is an explanatory view showing a method of measuring the locking force (N/10 mm) of the tightening belt 11.

According to the description of the specification and the drawings, at least the following matters can be clarified.

A disposable diaper for a low-weight child-expanding type of 3 kg or less, which has a ventral side portion of a ventral side of a low-weight child placed in a horizontal direction of 3 kg or less, and is placed in the sputum of the low-weight child. a lower portion and a back side portion disposed on the back side of the low-weight child in the lateral direction, and the front side portion, the crotch portion, and the back side portion are arranged in a longitudinal direction orthogonal to the lateral direction, and are transmitted through The locking portions of the tightening belts provided at the end portions of the back side portion in the lateral direction are respectively locked to the front side portions, thereby forming a peripheral opening portion and a pair of Opening around the foot The present invention includes an elastic member around the foot, which is provided at each of the two sides in the lateral direction of the crotch portion in the longitudinal direction, and is configured to contract the opening around the foot in the longitudinal direction; An elastic sheet surrounding the crucible is provided on the back side portion and extends toward both sides in the lateral direction for contracting the opening around the crucible in the lateral direction; in the unfolded state of the paper diaper, the circumference of the crucible is elastic Each of the end portions in the lateral direction of the sheet is located at the same position in the lateral direction as the position of the end portion of the elastic member in the longitudinal direction of the closest foot, or in the lateral direction. In the outer side, the outer peripheral elastic sheet is disposed so as to straddle the center position of the locking portion of the tightening band in the longitudinal direction in the longitudinal direction.

According to the unfolded disposable diaper of the unfolded type, the end portions of the elastic sheet in the lateral direction of the crucible are respectively located at the position of the end portion of the back side of the elastic member in the longitudinal direction around the closest leg in the lateral direction. The same position, or the outer side of the horizontal direction. In this way, the end portions are less likely to be affected by the force generated by the elastic members around the feet, whereby the end portions of the elastic sheets around the crucible can be in the form of a tensile force in the transverse direction. Quickly acts on the tightening strap. Further, by applying a shearing force in the lateral direction to the locking portion of the tightening band, the locking portion can be locked to the abdominal portion by the high locking force, and as a result, the winding of the tightening band can be effectively suppressed. Start and leave.

Further, since the elastic sheet around the crucible is disposed at a central position in the longitudinal direction of the locking portion of the tightening band in the longitudinal direction, the force to be contracted can be reduced in the longitudinal direction to be substantially uniformly distributed. Pass to tighten The belt also contributes to effectively suppressing the above-mentioned rolling up and detachment.

Further, since the elastic sheet around the crucible is formed into a sheet shape, the stretching force can be applied to the tightening belt in such a manner that the longitudinal direction shift is reduced and the shape is substantially uniformly distributed as compared with the case where the linear elastic member is used. This also helps to effectively suppress the above-mentioned rolling up and detachment.

In addition, a gap which may occur between the C-shaped tortuous back of the low-weight child in the posture and the back side of the disposable diaper can be reduced by the force of the surrounding elastic sheet to be contracted. In this way, the back side of the disposable diaper can be adhered to the back of the low birth weight infant.

Preferably, in the unfolded disposable diaper of the unfolding type, the end portion of the elastic sheet around the crucible is connected to the closest elastic band at the outer end portion of the end portion in the lateral direction.

According to the unfolded disposable diaper of the unfolded type, the elastic sheet around the crucible is joined to the lacing tape at the outer end portion in the lateral direction among the end portions. In this way, the force to be contracted at the end portion can be quickly and surely applied to the tightening band.

Preferably, the unfolded disposable diaper of the unfolded type has a direction perpendicular to both the longitudinal direction and the lateral direction in a thickness direction of the diaper in the unfolded state, and the diaper has the ventral side An absorbent body extending in the longitudinal direction of the lower portion and the back side portion, and a leakage preventing sheet covering the absorbent body from the non-muscle side in the thickness direction; when viewed from the thickness direction, the flaw The peripheral elastic sheet is overlapped with both the absorber and the leakage preventing sheet, and each end portion of the elastic sheet around the lateral direction is located at the end of the absorbent body and The position of the edge in the lateral direction of both of the leakage preventing sheets is the same as the outer side in the lateral direction.

According to the unfolded disposable diaper of the unfolded type, the end portion in the lateral direction of the elastic sheet around the crucible is located at the same position as the end edge of the absorbent body and the leakage preventing sheet in the lateral direction, or is It is more laterally lateral. As described above, when the tightening tape is stretched in the lateral direction for wearing the disposable diaper, the end portion can be freely stretched without receiving a large resistance from the absorbent body and the leakage preventing sheet. Moreover, by this, the force to be contracted at the end portion can be quickly applied to the tightening band.

Preferably, the unfolded disposable diaper of the unfolding type has the back side low rigidity portion having a lower rigidity than the surrounding portion corresponding to the position of the back side portion, and the back side low rigidity portion, When viewed from the aforementioned thickness direction, it overlaps with the aforementioned elastic sheet around the crucible.

According to such an unfolded disposable diaper, the back side low-rigidity portion overlaps with the elastic sheet around the crucible. As described above, in order to wear the disposable diaper and stretch the belt in the transverse direction, at least the rear side low-rigidity portion of the absorbent body is rapidly contracted in the lateral direction, and the back-side low-rigidity portion does not become a large resistance. Moreover, it is thereby possible to stretch the elastic sheet around the crucible with a small tensile force. As a result, it is easy to generate a force to be contracted around the elastic sheet around the crucible.

Further, the low-back portion of the back side is easily contracted in the lateral direction. Therefore, when worn, the back side low-rigidity portion is rapidly contracted by the force of the surrounding elastic sheet to be contracted. Thus, the gap between the back of the C-shaped twisted back and the back side of the disposable diaper of the low-weight child under the posture of the posture is borrowed. It shrinks rapidly due to the contraction of the low-rigid portion of the back side.

Preferably, the unfolded disposable diaper has a target region in which the locking portions of the tightening belts of the end portions of the back side portion are respectively locked; The absorbent body has a ventral low-rigidity portion having a lower rigidity than the surrounding portion corresponding to the position of the aforementioned ventral portion, and the ventral low-rigidity portion overlaps the target region when viewed from the thickness direction.

According to the unfolded disposable diaper according to such an unfolded type, when the wearing portion is locked, the locking position of the locking portion of each of the tightening bands of the target region is formed by sandwiching the low-rigid portion of the ventral side from the lateral direction. In the case of living, the ventral low-rigidity portion is easily enlarged by the force of the surrounding elastic sheet to be contracted. Further, the locking portion is moved in the lateral direction by the expansion operation, and the locking portion can be dissolved in the target region to be firmly engaged, whereby the locking of the locking portion and the target region can be made stronger. .

Preferably, the unfolding type disposable diaper of the unfolding type has a shape in which the locking portion of the tightening band has a side at an inner side in the lateral direction, and the elastic member around the foot has a longitudinal direction a strip-shaped elastic sheet of a pair of long sides and a short side of the pair of the lateral direction; wherein the short side of the back side and the locking portion of the tightening belt are used among the short sides of the pair The inner side of the lateral direction is a quadrangular region which is defined by the opposite side, and a part of the elastic sheet around the weir is present.

According to such a disposable disposable disposable diaper, a part of the elastic sheet around the crucible is present in the above-mentioned square-shaped region. In addition, the quadrangular region is a force that can be transmitted from the elastic member around the foot to the locking portion of the tightening band. Pass the path. In this manner, even if the elastic member around the foot transmits a force for pulling the locking portion downward toward the opening portion around the foot, the force can be relieved and transmitted to the locking portion via a part of the elastic sheet around the crucible, thereby effectively suppressing the cause. The detachment of the tension band of the force.

Preferably, the unfolded disposable diaper of the unfolded type has an effective portion that shrinks the opening around the crotch in the lateral direction, and does not shrink the opening around the crotch in the lateral direction. In the ineffective portion, the ineffective portion is located at each end portion of the elastic sheet around the lateral direction in the lateral direction, and is located between the tightening belt and the effective portion.

According to such an unfolded disposable diaper, there is an ineffective portion between the lacing tape and the effective portion. Thus, when the tightening band is stretched in the lateral direction, the ineffective portion is more easily stretched. Further, the force to be contracted by the stretching can be quickly applied to the tightening band in the form of a tensile force in the lateral direction. Therefore, the locking portion of the tightening band can be locked to the ventral portion with a moderate locking force.

Preferably, the unfolded disposable diaper of the unfolded type has a tightening belt at one end of each of the end portions as a first belt, and a tightening belt at the other end portion as a second belt. The locking portion of the first belt is locked to the front side portion, and the locking portion of the second belt is superposed on the non-locking portion side of the first belt. The locking force of the locking portion of the second belt and the non-locking portion side of the first belt is 0.1 (N/10 mm) or more, and the locking portion and the ventral side of the first belt The locking force of the part (N/10mm) and the aforementioned card of the second band The locking force (N/10 mm) of the stopper portion and the front side portion is larger than the locking force (N/10 mm) of the surface of the first belt on the non-locking portion side and the locking portion of the second belt, respectively. Further, the center position of the first belt in the longitudinal direction is aligned with the center position of the second belt in the longitudinal direction, and is on the non-locking side of the first belt. When the locking portion of the second belt is overlapped and locked, the first belt and the second belt are set such that the locking portions of the second belt extend beyond the first belt on both sides in the longitudinal direction. .

According to the unfolded disposable diaper of the unfolded type, the locking force when the locking portion of the second tape is locked to the non-locking portion side of the first tape is 0.1 (N/10 mm) or more. As described above, in the form in which the tightening bands overlap each other (hereinafter also referred to as "the tightening band overlapping form"), the first tape and the second tape can be surely locked to the front side portion. In other words, the locking portion of the first belt can be locked to the front side portion, and the locking portion of the second belt can be surely locked to the surface of the first belt on the non-locking portion side.

In addition, in the case of the "tightening band overlapping form", the first and second bands can be moved away from the center side of the abdominal portion in the lateral direction, and the first and second bands can be moved away from the feet of the low-weight child. . As a result, the urging force applied to the first and second belts from the M-shaped legs can be reduced, and the winding and detachment of the first and second belts can be suppressed.

Further, according to the above configuration, although the second belt in which the tightening band is superposed can be easily peeled off from the first belt, the locked state of the second belt as a whole can be made stronger. Details are as follows.

First, as described above, the locking force (N/10 mm) of the male material and the front side portion of the first belt is set to be larger than the non-locking portion side of the first belt and the locking portion of the second belt. The locking force (N/10mm) is larger. Therefore, when the second belt is grasped and the second belt is peeled off from the first belt, the first belt can be effectively prevented from being peeled off from the front side portion. Thus, in the stable first belt, only the second belt can be separated. Peeled from the first tape. Further, by this, the second belt can be easily peeled off from the first belt, which contributes to the above-described minimum processing.

On the other hand, in the case where the tightening band is superimposed, the locking portion of the second belt is locked to the non-locking portion side of the first belt as described above, and in this case, the locking portion of the second belt is in the longitudinal direction. Both sides are beyond the shape of the first belt. Further, the excess portion is locked to the abdominal portion, and the locking force (N/10 mm) that is locked to the abdominal portion is a locking engagement with the surface of the first belt on the non-locking portion side. The force (N/10mm) is larger. Therefore, the locking force of the locking portion of the second belt can be increased in accordance with the component of the excess portion.

===This embodiment ===

Fig. 2 is a schematic plan view showing the unfolded state of the disposable disposable diaper 1 of the embodiment. 3A, 3B, and 3C are an A-A cross-sectional view, a B-B cross-sectional view, and a C-C cross-sectional view in Fig. 2, respectively. In addition, FIG. 4 is a schematic perspective view of the disposable disposable diaper 1 in a worn state.

The disposable diaper 1 is a paper disposable diaper 1 which is specially made for a low-weight child of 3 kg or less, and is an unfolded disposable diaper 1 which is worn on a low-weight child 101 using a tightening belt 11. Moreover, the disposable diaper 1 shown in Fig. 2 has a longitudinal direction and a lateral direction as three directions orthogonal to each other. And thickness direction. Here, the front side portion 1a, the crotch portion 1m, and the back side portion 1b are sequentially arranged in the longitudinal direction. In the worn state of Fig. 4, the ventral side portion 1a covers the ventral side of the low birth weight infant 101, and the lower part of the lower part is covered with 1 m. During the daytime of the low birth weight 101, the dorsal portion 1b covers the dorsal side of the low birth weight infant 101.

Further, in the unfolded state of Fig. 2, the front side portion 1a and the back side portion 1b protrude from both sides of the crotch portion 1m in the lateral direction. Thus, the outer shape of the disposable diaper 1 viewed from the thickness direction is substantially hourglass-shaped in plan view. . In the following, each of the portions 1asf, 1asf of the front side portion 1a that protrudes in the lateral direction is also referred to as "ventral side flap 1asf", and the respective portions 1bsf of the back side portion 1b that protrude in the lateral direction are 1bsf is also called "back side flap 1bsf". Further, each of the back side flaps 1bsf and 1bsf corresponds to "each end portion in the lateral direction" in the request item. In addition, hereinafter, one side in the thickness direction is also referred to as "muscle side", and the other side is also referred to as "non-muscle side". Incidentally, the schematic plan view of Fig. 2 is a view of the disposable diaper 1 as viewed from the muscle side.

Here, as shown in FIG. 2, the tightening band 11 is provided so as to protrude in the lateral direction at the outer end portion of each of the back side flaps 1bsf in the lateral direction. Further, each of the tightening belts 11 is locked by the target belt 15 (FIG. 2, FIG. 3A) provided on the non-muscle side of the abdominal portion 1a, and as shown in FIG. And the pair of feet around the opening HL, HL, the disposable diaper 1 is worn by the low birth weight 101.

The disposable diaper 1 includes an absorbent body 3 for absorbing a substantially vertical shape of excretion liquid such as urine, a top sheet 2 for absorbing the liquid absorbing body 3 from the muscle side, and a non-muscle side of the absorbent body 3. Covering liquid is not transparent The over-leak-proof sheet 4, the substantially hourglass-shaped exterior sheet 5 which covers the outer shape of the disposable diaper 1 from the non-muscle side, and one side of the top sheet 2 arranged side by side in the lateral direction The three-dimensional pleated sheets 6, 6 and the pair of three-dimensional hem sheets 6, 6 are formed with three-dimensional hem 6g, 6g as leak-proof walls at the respective end portions of the absorbent body 3 in the lateral direction.

As shown in FIGS. 3A to 3C, the absorber 3 has an absorbent core 3c and a core-coated sheet 3rs covering substantially the entire outer peripheral surface of the absorbent core 3c. The absorbent core 3c is a liquid absorbing granular material such as a liquid absorbent fiber such as pulp fibers or a highly absorbent polymer (hereinafter also referred to as SAP), and is formed into an hourglass shape in a plan view. (figure 2). The core-coated sheet 3rs is a liquid-permeable sheet using a tissue paper or a nonwoven fabric. In addition, the portions 3cna and 3cnb in which the constituent materials of the absorbent core 3c such as pulp fibers are not present are provided in the respective ends of the absorbent core 3c in the longitudinal direction, and will be described later.

The top sheet 2 is formed of a non-woven fabric such as a hot air non-woven fabric, and has a planar size that protrudes from both sides in the longitudinal direction and lateral sides of the absorbent body 3 as shown in FIGS. 2 and 3A to 3C. Further, the leakage preventing sheet 4 also has a planar size which protrudes from both sides in the longitudinal direction of the absorbent body 3 and both sides in the lateral direction, and is formed of a resin film such as a polyethylene film. Further, the two sheets 2, 4 are joined to each other by adhesion, welding, or the like in a portion protruding from the absorbent body 3 in the longitudinal direction and the lateral direction, whereby the absorbent body 3 is held between the two sheets 2, 4.

As shown in Fig. 2, the outer sheet 5 is suitably woven. The cloth or the like is formed to have the outer shape of the disposable diaper 1. Further, on the muscle side surface of the exterior sheet 5, the two sheets 2, 4 and the absorber 3 held between the sheets 2 and 4 are overlapped while being aligned with each other in the horizontal direction. Adhesion by bonding or welding, etc. (Fig. 3A to Fig. 3C). Further, in this integrated state, the absorbent body 3 extends over the abdominal side portion 1a, the crotch portion 1m, and the back side portion 1b (Fig. 2).

The three-dimensional hem sheets 6, 6 are provided so as to cover the respective end portions 2e, 2e so that the respective end portions 2e, 2e of the top sheet 2 in the lateral direction are covered from the muscle side. Further, each of the sheets 6, 6 is formed in the longitudinal direction with three-dimensional hem 6g, 6g rising from the muscle side of the top sheet 2. In other words, in the inner edge of the three-dimensional pleated sheet 6 in the lateral direction, the plurality of rubber threads 6r, 6r in the longitudinal direction are fixed by being adhered in a state of being elongated in the longitudinal direction, and are closer to the inner end. The edge is fixed to the top sheet 2 by the predetermined position P6g on the outer side in the lateral direction as a fixed position. Thereby, when the stretched state of the rubber thread 6r is relaxed, the inner edge of the three-dimensional hem sheet 6 and its vicinity are contracted in the longitudinal direction by the force of the rubber thread 6r to be contracted, and thus, The fixed position P6g serves as an upright position such that the inner end edge and its vicinity are rapidly erected from the muscle side of the top sheet 2, thereby forming a three-dimensional hem 6g.

Further, as shown in FIGS. 2 and 3A to 3C, the three-dimensional hem sheet 6 extends to the outside in the lateral direction to substantially the same position as the edge on the outer side of the exterior sheet 5, and at the end edge or The vicinity of the position is adhered or welded to the exterior sheet 5 to be integrated. Thereby, the three-dimensional hem sheet 6 and the exterior sheet 5 are common to each other, at the front side portion 1a and the back side portion 1b forms the aforementioned ventral side flaps 1asf, 1asf and the back side flaps 1bsf, 1bsf, respectively. On the other hand, the same is true in the lower portion 1m, and the three-dimensional hem sheet 6 and the exterior sheet 5 are adhered or welded at the end edge or in the vicinity thereof, and are integrated, thereby extending from the end edge to the inner side in the lateral direction. The established range forms a leg flap of 1 mf, 1 mf.

Each leg flap 1mf, 1mf is a portion that constitutes the opening HL around the foot in a worn state, that is, a portion around the foot of the low-weight child 101. Further, in order to form the leg hem by contracting the leg flaps 1mf in the longitudinal direction, the strip-shaped elastic sheets 21 which are linear in the longitudinal direction as the elastic members 21 around the legs are formed on the respective leg flaps 1mf. It is fixed by adhesion or the like in a state of being elongated in the longitudinal direction. Thereby, when the stretched state of the elastic member 21 around the foot is relaxed, the leg flap 1mf is contracted in the longitudinal direction to form a plurality of wrinkles, and the wrinkles become leg gathers.

Incidentally, as shown in FIG. 3B, for example, the elastic member 21 around the foot is interposed between the exterior sheet 5 and the three-dimensional hem sheet 6, but is not limited thereto. For example, it may be adhered to the non-muscle side of the outer sheet 5, or may be adhered to the muscle side of the three-dimensional hem sheet 6.

In addition, in the present example, the strip-shaped elastic sheet 21 is formed of a stretchable nonwoven fabric (an elastomer fiber including a polyurethane fiber or the like and a stretchable nonwoven fabric according to its own elasticity), but is not limited thereto.

In other words, other types of sheets can be used as long as they are elastically stretchable without depending on rubber threads, flat rubber, or the like. For example, a stretchable film (including an elastic body and having elasticity according to its own elasticity) can be used. Film).

As shown in FIGS. 2 and 3A, the tightening belts 11, 11 are respectively provided at the front end portions of the pair of back side flaps 1bsf, 1bsf in the lateral direction. Each of the tightening belts 11 is a strip-shaped sheet made of a horizontally long non-woven fabric as a tape substrate 11a, and one end portion of the tape substrate 11a in the lateral direction is fixed to the front end portion of the back side flap 1bsf, and the other end portion is back. The front end portion of the side flap 1bsf protrudes outward in the lateral direction.

Further, the male material 11m (corresponding to the locking portion) of the fastening member is fixed to the muscle side surface of the protruding portion, and a plurality of locking projections (not shown) are provided on the muscle side surface of the male material 11m. In this manner, the locking projection of the male material 11m is hooked on the non-muscle side surface of the target belt 15, whereby the tightening belt 11 is locked on the target belt 15. The public material 11m can be used as a fastening member, and for example, a fishing needle shape or a T-shaped projection can be suitably used.

As shown in FIG. 2 and FIG. 3A, the target belt 15 (corresponding to the target region) is provided on the non-muscle side surface of the abdominal portion 1a, that is, the non-muscle side surface of the exterior sheet 5. In this example, the belt 15 is formed in a horizontally long rectangular shape, and is adhered or welded between the outer sheet 5 and the outer sheet 5 while being aligned with each other in the horizontal direction, thereby fixing the target belt 15 to the outer casing. Sheet 5.

Further, in this example, in order to increase the locking force with the tightening belt 11, the target belt 15 is a horizontally long rectangular hot air non-woven fabric having a basis weight of 25 (g/m ² ) or more. This ensures the necessary locking force for the appropriate locking. The standard of the locking force required for the appropriate locking is, for example, 0.1 (g/10 mm) or more. The method of measuring the stopping force and the like will be described later.

Incidentally, the material of the target belt 15 is not limited to the above-described hot air non-woven fabric. In other words, a loop material other than the spunbonded nonwoven fabric or a non-woven fabric can be used as long as the engaging force of the above-mentioned size can be secured between the male material 11m and the male material 11m of the tightening tape 11. The base material of the known adhesive member. In other words, when the exterior sheet 5 is not woven, the exterior sheet 5 can be used as the target belt, thereby omitting the dedicated target belt 15.

Further, when the disposable diaper 1 is worn on a low-weight child, the pair of tensioning belts 11, 11 are used to stretch the paper diaper 1 on both sides in the lateral direction, and the pair of the wearing belts 11, 11 respectively The card is locked to the target belt 15. Incidentally, in this example, the tape substrate 11a protrudes outward in the lateral direction from the male material 11m, and when the tightening tape 11 is stretched to the both sides, the protruding portion 11ap is used as a grip for grasping. The portion 11ap is used to function.

The above is a description of the basic structure of the disposable diaper 1. In the present embodiment, in order to solve the above-described problems (the problem of suppressing the winding up and detachment of the tightening band 11 and the back side portion 1b being adhered to the back), several means are employed. . This is explained below.

Fig. 5 is an explanatory view of the means, and is a schematic plan view showing an unfolded state similar to Fig. 2; The first means is an elastic member 31 that imparts stretchability to the peripheral opening portion HB of the crucible. In other words, in the present embodiment, in order to impart stretchability to the peripheral opening portion HB of the crucible, an elastic sheet 31 having a horizontally long rectangular strip shape is provided on the back side portion 1b (hereinafter also referred to as an elastic sheet 31 around the crucible). Therefore, in the natural state without external force, the portion of the back side portion 1b corresponding to the opening portion HB around the crucible is received in the lateral direction. Shrink. More specifically, the elastic sheets 31 are respectively extended to both sides in the lateral direction, and are fixed to the muscle side in the thickness direction of the sheet 31 by adhesion or welding in a state in which the sheet 31 is elongated in the lateral direction. Each member 2, 3, 4, 5, 6 adjacent to the non-muscle side. Therefore, when the stretched state is relaxed and the natural state is relaxed, the portion of the back side portion 1b fixed to the elastic sheet 31 is mainly contracted in the lateral direction to be in a state in which a plurality of wrinkles are formed. As described above, the elastic sheet 31 can be rapidly elongated in the lateral direction until the wrinkles are completely extended, and the opening portion HB around the crotch is in a state of being stretched.

5 and 3A, the members 2, 3, 4, 5, and 6 which are adjacent to the non-muscle side and the muscle side in the thickness direction which are fixed to the elastic sheet 31 are corresponding to the lateral direction and the longitudinal direction. The position of the direction varies. For example, as shown in FIG. 3A, the position on the center side in the lateral direction of the non-muscle side in the thickness direction is fixed to the leakage preventing sheet 4 at this position because the leakage preventing sheet 4 is present. However, in the position on the respective end sides in the lateral direction, since the leakage preventing sheet 4 does not exist, the elastic sheet 31 is fixed to the exterior sheet 5. In addition, as shown in FIG. 5 and FIG. 3A, the center side of the muscle side in the thickness direction in the thickness direction is the center side in the longitudinal direction, and the absorber 3 is present at this position, and is fixed to the absorber 3 at this position. . However, the position where the absorber 3 does not exist is fixed to the top sheet 2, and the position of each end side in the lateral direction where the top sheet 2 does not exist is fixed to the three-dimensional hem sheet 6.

Further, in the present embodiment, in the unfolded state of the disposable diaper 1 of Fig. 5, the elastic sheet 31 is at least on both sides in the lateral direction. Extending to a position near the respective tightening belts 11, 11, whereby the respective end portions 31e1, 31e1 of the elastic sheet 31 in the lateral direction are located at the back side of the longitudinal direction of the elastic members 21, 21 around the closest foot. The positions of the end portions 21e2, 21e2 are the same at the same position in the lateral direction, or the outer side in the lateral direction.

Thus, the end portions 31e1, 31e1 are less likely to be affected by the force generated by the elastic members 21 around the feet, whereby the respective end portions 31e1, 31e1 of the elastic sheet 31 around the crucible can be contracted by their own forces. As the tensile force in the transverse direction, it acts rapidly on the closest tightening belts 11,11. In addition, by applying a shearing force in the transverse direction to the male material 11m of the tightening belt 11, the male material 11m can be locked to the target belt 15 of the abdominal portion 1a with a high locking force. As a result, The winding up and detachment of the tightening belt 11 can be effectively suppressed.

Incidentally, the "unfolded state" herein means that, as shown in Fig. 5, the tightening of the target belt 15 by the respective tightening belts 11, 11 releases the front side portion 1a and the lower portion 1m and the back side. The portion 1b is in a state of being aligned in the longitudinal direction, and the diaper 1 is stretched in both the longitudinal direction and the lateral direction in such a manner that the contraction of the portion corresponding to the peripheral opening portion HB of the crucible generated by the elastic sheet 31 around the crucible is based on A pair of legs around the elastic members 21, 21 produce a state in which the pair of leg flaps 1mf, 1mf contraction just disappears.

Further, in the unfolded state of FIG. 5, the elastic sheet 31 around the crucible is disposed so as to extend in the longitudinal direction across the center position C11m in the longitudinal direction of the male material 11m of the tightening belt 11. In detail, at all positions in the lateral direction of the elastic sheet 31, the elastic sheet 31 includes a connecting line LNC11m which is a joint material 11m which connects one of the tightening belts 11 A line between the center position C11m in the longitudinal direction and the center position C11m of the public material 11m of the other tightening belt 11. In this manner, the elastic sheet 31 can transmit the force to be contracted to the respective tightening belts 11, 11 in such a manner that the longitudinal displacement is reduced in a substantially uniform manner, which also contributes to effectively suppressing the above-described winding up and detachment.

Incidentally, in order to improve the effect, the inventors have confirmed that the overlapping ratio of the male material 11m and the elastic sheet 31 in the longitudinal direction (the amount of overlap of the male material 11m and the elastic sheet 31 in the longitudinal direction is LOL (mm) The percentage of the value obtained by the maximum dimension L11m in the longitudinal direction of the public material of 11 m is 70% or more.

Further, since the elastic sheet 31 around the crucible is an elastic film containing a suitable elastomer resin, the sheet 31 itself has elasticity. In this way, compared with the case where a plurality of rubber wires or flat rubbers are used, the tensile force can be applied to the tightening belt 11 in such a manner that the longitudinal displacement is reduced and the distribution is substantially uniform, which also contributes to the effective suppression of the above. Roll up and detach.

Further, a gap G which may be generated between the back G which may be generated in the posture shown in Fig. 1B, that is, the back of the low-weighted child 101 which is C-shaped and the back side 1b of the disposable diaper 1 is also It is reduced by the force of the elastic sheet 31 to be contracted. Thus, the back side portion 1b of the disposable diaper 1 can be brought into close contact with the back of the low birth weight infant 101.

The above is a description of the first means, which is an essential means for the disposable diaper 1 of the present invention. On the other hand, the means described below is not essential, but if used, the above problems can be solved more effectively. Therefore, the disposable diaper 1 of this embodiment also employs the following s method.

First, in this example, as shown in Fig. 5, the end portions 31e1 in the lateral direction of the elastic sheet 31 around the crucible are respectively connected to the closest tightening at the outer end portion 31e1e in the lateral direction among the end portions 31e1. With 11.

In this way, the force to be contracted by the end portion 31e1 can be quickly and surely applied to the tightening belt 11. Moreover, this also contributes to effectively suppressing the above-described rolling up and detachment.

Further, in this example, as shown in Fig. 5, the elastic sheet 31 around the crucible is disposed to overlap both the absorber 3 and the leakage preventing sheet 4 as viewed in the thickness direction, in which case the elastic sheet 31 around the crucible is provided. Each of the end portions 31e1 and 31e1 in the lateral direction is located at the same position as the end edge of the absorbent body 3 and the leakage preventing sheet 4 in the lateral direction, or is located outside the lateral direction.

As described above, at least the end portions 31e1, 31e1 of the elastic sheet 31 around the crucible are not stretched from the absorbent body 3 when the tensioning belts 11, 11 are stretched on both sides in the lateral direction for wearing the disposable diaper 1. The leakage sheet 4 is subjected to a large resistance and can be freely stretched. Further, by this, the force to be contracted at the end portion 31e1 can be quickly applied to the tightening belt 11 as a tensile force in the lateral direction after the tightening belt 11 is locked to the target belt 15. It also helps to effectively suppress the above-mentioned rolling up and detachment.

Further, in this example, as shown in Fig. 5, the absorbent body 3 is a position corresponding to the back side portion 1b, and has a low rigidity portion 3nb (corresponding to the back side low rigidity portion) having a lower rigidity than the surrounding portion. That is, in this example, in the lateral direction of the end portion of the back side in the longitudinal direction of the absorbent core 3c At the center position, a substantially triangular space 3cnb is formed in which the constituent material of the absorbent core 3c such as pulp fibers and SAP is completely absent, whereby the low-rigidity portion 3nb is formed in the absorber 3. Further, the low-rigidity portion 3nb is overlapped with the elastic sheet 31 around the crucible as viewed from the thickness direction.

Thus, when the disposable diaper 1 is worn and the tightening belts 11, 11 are stretched on both sides in the lateral direction, at least the low-rigidity portion 3nb of the absorbent body 3 is rapidly contracted in the lateral direction, and the low-rigidity portion 3nb does not become Great resistance. Moreover, by this, the elastic sheet 31 around the crucible can be stretched with a small tensile force, and as a result, it is easy to generate a force to be contracted around the elastic sheet 31 around the crucible.

However, the portion 3cnb of the absorptive core 3c corresponding to the low-rigidity portion 3nb is not limited to the above space. In other words, as long as the basis weight (g/m ² ) is smaller than the surrounding portion, the above-described effects can be exerted correspondingly. Therefore, the constituent material of the plurality of absorbent cores 3c may be present in the portion 3cnb.

Further, in this example, as shown in Fig. 5, the absorbent body 3 is a position corresponding to the ventral side portion 1a, and has a low rigidity portion 3na (corresponding to the ventral low rigidity portion) having a lower rigidity than the surrounding portion. In this case, in the center position in the lateral direction of the end portion of the abdominal side in the longitudinal direction of the absorbent core 3c, a space 3cna in which the upper bottom and the lower bottom are substantially trapezoidal in plan view in the lateral direction is formed. The absorbent body 3 forms the above-described low rigidity portion 3na. Further, the low rigidity portion 3na overlaps the target belt 15 when viewed from the thickness direction.

Thus, as shown in FIG. 6, when the disposable diaper 1 is worn, when the respective materials 11m, 11m of the respective tightening belts 11, 11 of the target belt 15 are locked, the low rigidity portion 3na is removed from In the case where the both sides are sandwiched in the lateral direction, the low-rigidity portion 3na is easily enlarged by the force of the surrounding elastic sheet 31 to be contracted. In addition, the male material 11m is moved in the lateral direction by the expansion operation, and the male material 11m can be dissolved in the target belt 15 and firmly bitten, whereby the locking of the male material 11m and the target belt 15 can be further improved. strong.

However, the portion 3cna of the absorptive core 3c corresponding to the low rigidity portion 3na is not limited to the above space. In other words, as long as the basis weight (g/m ² ) is smaller than the surrounding portion, the above-described effects can be exerted correspondingly. Therefore, the constituent material of the plurality of absorbent cores 3c may be present in the portion 3cna.

Further, in this example, as shown in Fig. 5, the planar shape of the male material 11m of the tightening belt 11 is substantially quadrangular, and thus the inner side of the lateral direction has a side in the longitudinal direction of 11 ms. On the other hand, the elastic member 21 around the foot is a strip-shaped elastic sheet 21 provided in the longitudinal direction, and has an outer shape having a long side 21s2, 21s2 in one pair in the longitudinal direction and one pair in the lateral direction. Short side 21s1, 21s1. Further, the short side 21s1 on the back side and the inner side 11 ms in the lateral direction of the male material 11m of the tightening belt 11 among the short sides 21s1 and 21s1 of the pair are used as the square area A11m21 which is defined by the opposite side ( In Fig. 5, a region A11m21) indicated by a halftone dot is provided with a part of the elastic sheet 31 around the crucible, and this quadrangular region A11m21 is a transmission path through which the force can be transmitted from the elastic member 21 around the foot to the male material 11m of the tightening belt 11.

In this manner, even if the elastic member 21 around the foot transmits a force for pulling the male material 11m downward toward the opening HL side of the foot, the force can be relieved and transmitted to the male material 11m via the above-described part of the elastic surrounding sheet 31. The detachment of the tightening belt 11 due to the force can be effectively suppressed.

Further, in this example, the elastic sheet 31 around the crucible as shown in Fig. 7 has an effective portion 31a that contracts the opening portion HB around the crucible in the lateral direction, and an ineffective portion that cannot shrink the opening portion HB around the crucible in the lateral direction. 31n, 31n. Further, the ineffective portions 31n, 31n are end portions 31e1, 31e1 located in the lateral direction of the elastic sheet 31 around the crucible, and the ineffective portions 31n, 31n are located between the closest tightening belt 11 and the effective portion 31a, respectively. Further, each of the invalid portions 31n and 31n has a substantially natural length state in a natural state in which no external force acts.

Thus, when the tightening band 11 is stretched in the lateral direction, the ineffective portion 31n is relatively easily and rapidly stretched. Further, the force to be contracted by the stretching can be quickly applied to the tightening belt 11 in the form of a tensile force in the lateral direction. Therefore, the male material 11m of the tightening belt 11 can be locked to the target belt 15 of the abdominal portion 1a with an appropriate locking force.

Further, in this example, as shown in Fig. 8, the pair of tightening belts 11, 11 are configured to be locked in the "strap band overlapping form". In this case, if the locking band is overlapped, it is possible to lock the respective tightening belts 11 and 11 in the portion on the center side in the lateral direction of the abdominal portion 1a when worn. The bundles 11, 11 can be moved away from the M-shaped feet of the low birth weight 101. As a result, the aforementioned urging force F (Fig. 1B) imparted to each of the tightening belts 11, 11 from the foot can be alleviated, and can be suppressed. The winding and detachment of each of the tightening belts 11,11.

Hereinafter, the manner in which the tightening band overlaps will be described. First, for convenience of explanation, the tightening band 11 of the back side flap 1bsf located on the left side in FIG. 8 is referred to as "left side belt 11-1 (corresponding to the first belt)" Similarly, the tightening band 11 of the back side flap 1bsf located on the right side is referred to as "the right side belt 11-2 (corresponding to the second belt)".

Further, as shown in Fig. 8, the male material 11m of the muscle side surface of the left side belt 11-1 is locked to the target belt 15 of the abdominal side portion 1a, and the male material 11m of the muscle side surface of the right side belt 11-2 is overlapped. Stop on the non-muscle side 11-1s of the left side belt 11-1. In other words, in the form in which the tightening band is overlapped, the non-muscle side surface 11-1s (corresponding to the non-locking side) of the left side belt 11-1 is used as the male material 11m for locking the right side belt 11-2. The base material. Therefore, in this example, the non-muscle side surface 11-1s of the left side belt 11-1 is formed, for example, by a non-woven fabric having a larger basis weight of 50 (g/m ² ) or more, whereby the right side belt 11-2 is made public. The locking force of the non-muscle side surface 11-1s of the material 11m and the left side belt 11-1 is 0.1 (N/10 mm) or more. In this way, the male material 11m of the right side belt 11-2 can be locked by the locking force required for the locking on the non-muscle side surface 11-1s of the left side belt 11-1, thereby achieving the form of the tension band overlapping.

Here, it is preferable to set the following configuration of the tightening band. That is, the locking force (N/10 mm) of the public material 11m of the left side belt 11-1 and the target belt 15 and the locking force of the target belt 15 of the right side belt 11-2 and the target belt 15 (N/10 mm) It is set to be larger than the locking force (N/10mm) of the non-muscle side 11-1s of the left side belt 11-1 and the 11m of the right side belt 11-2, and further, to make the left side belt 11-1 In the longitudinal direction The center position C11-1 is aligned with the center position C11-2 of the right side belt 11-2 in the longitudinal direction, and the right side belt 11-2 is placed on the non-muscle side 11-1s of the left side belt 11-1. When the material 11m overlaps and is locked, the left side belt 11-1 and the right side belt 11-2 are set such that the male material 11m of the right side belt 11-2 extends beyond the non-muscle side 11 of the left side belt 11-1 on both sides in the longitudinal direction. 1s.

For example, in the example of Fig. 8, regardless of the shape of the left and right side belts 11-1, 11-2, the shapes are the same as each other, and specifically, the longitudinal direction is advanced along the front end side in the lateral direction. The size of the direction becomes smaller and the shape of the front end becomes thinner. Therefore, when the left side belt 11-1 and the right side belt 11-2 are aligned so that the central positions C11-1, C11-2 of the longitudinal direction thereof coincide with each other and the non-muscle side surface 11 of the left side belt 11-1 When the 1st side of the right side 11-2 is placed on the right side 11m, the right side of the right side belt 11-2 is 11m, and the position P11-2n of the right side of the right side belt 11-2 is in the longitudinal direction. Both sides of the direction extend beyond the left side belt 11-1.

Further, according to this configuration, the left side belt 11-1 of the tightening band overlapping form can be easily peeled off from the right side belt 11-2, and the locked state of the right side belt 11-2 can be made stronger as a whole. Details are as follows.

First, as described above, in this example, the locking force (N/10 mm) of the male material 11m of the left side belt 11-1 and the target belt 15 is set to be 11-1s and the right side of the non-muscle side of the left side belt 11-1. The locking force (N/10mm) of the 1m with the 11-2 material is larger. Therefore, when the grip portion 11ap at the end portion of the right side belt 11-2 is grasped and the right side belt 11-2 is peeled off from the left side belt 11-1, the left side belt 11-1 can be effectively prevented from being peeled off from the target belt 15 together. So, on the stable left side belt 11-1, only the right side belt 11-2 can be separately from the left side Strip 11-1 peeling. Moreover, by this, the right side belt 11-2 can be easily peeled off from the left side belt 11-1, and as a result, when the disposable diaper 1 is to be replaced and the tightening belts 11-1, 11-2 are untied, the lowering can be avoided. The weight of the baby 101 brings a lot of pressure and helps to minimize the treatment.

Further, as described above, in the form in which the tightening band is overlapped, the male material 11m of the right side belt 11-2 is the position P11-2n on the root side of the right side belt 11-2 in the lateral direction, and is extended on both sides in the longitudinal direction. The left side is 11-1. Further, the excess portion is locked with the target belt 15 of the abdominal portion 1a. Here, the locking force (N/10 mm) that is locked with the target belt 15 is set to be different from that of the left side belt 11-1. The locking force (N/10mm) of the muscle side 11-1s is larger. In this way, the locking force of the male material 11m of the right side belt 11-2 can be increased to correspond to the component of the excess portion.

Incidentally, the measurement of the locking force (N/10 mm) is carried out, for example, by using an Autograph tester AG-X10p1us (manufactured by Shimadzu Corporation) as an example of a tensile tester. Fig. 9 is a schematic side view showing the state of the measurement.

First, a part of the tightening tape 11 of the disposable diaper 1 is cut out, thereby producing a sample 11s (hereinafter referred to as a tightening tape sample 11s) having a rectangular shape in which the base material 11a and the male material 11m have the same shape. Further, a part of the target tape 15 of the disposable diaper 1 is also cut out, thereby generating a sample 15s of the target tape 15 (hereinafter referred to as a target tape sample 15s). At this time, the target tape test is compared with the tightening tape sample 11s. The size of both the longitudinal direction and the lateral direction of the sample 15s is set to be larger.

Next, on the non-muscle side of the target tape sample 15s, The test material 11s 15s is produced by locking the male material 11m of the above-mentioned tightening tape sample 11s. However, at the time of the locking, the horizontal direction of each other is made to be parallel, and the lacing tape sample 11s is not aligned beyond the non-muscle side of the target tape sample for 15 s, and the target tape sample is 15 s. After the elastic band sample was placed on the non-muscle side for 11 s, the weight of a 700 g roller (not shown) was applied to the two samples for 11 s, 15 s, and the roller was oriented in the peeling direction, that is, 5 (mm/) in the lateral direction. The speed of the scrolling. Thereby, the two samples 11s and 15s are brought into a predetermined locked state.

On the other hand, as shown in Fig. 9, the tensile testing machine has a pair of heads 81u, 81d which are separable in the vertical direction. Specifically, one of the head portions 81u is a moving head portion 81u that can move up and down in the vertical direction, and the other head portion 81d is a fixed head portion 81d that is provided below the moving head portion 81u so as not to be movable. Further, the upper surface of the fixed head portion 81d has a flat inclined surface 81ds which is inclined at 135° with respect to the vertical direction.

Further, the measurement sample 11s15s is fixed to the inclined surface 81ds. Further, in this case, the target tape sample 15s is brought into surface contact with the inclined surface 81ds, whereby the tightening tape sample 11s is positioned above the target tape sample 15s. Further, it is arranged such that the lateral direction of each of the samples 11s and 15s is parallel to the oblique direction of the inclined surface 81ds. Further, one end portion of the holding auxiliary sheet 83 is fixed to the lower end edge 11sde in the oblique direction of the tightening tape sample 11s, and the holding auxiliary sheet 83 is formed in the longitudinal direction (in FIG. 9, the direction penetrating the paper surface) Exceeding the lower end edge 11sde, the other end portion of the holding auxiliary sheet 83 is moved by the head 81u The grip 81uc is held.

In this manner, the load value (N) acting on the head portion 81d is measured by a dynamometer (not shown) provided on the fixed head portion 81d, and the moving head is moved at a fixed moving speed of 300 (mm/min). The portion 81u is moved upward, whereby the head portion 81u is separated from the fixed head portion 81d.

In this manner, the tightening tape sample 11s is sequentially peeled off from the target tape sample 15s. At this time, among the measured load values, the recording load value P135 is transmitted from the moving head portion 81u through the holding auxiliary sheet 83. The angle θ between the direction of the peeling force Fh of the sample 11s and the direction of inclination of the inclined surface 81ds is 135°. Then, the recorded load value P135 is converted into a load value when the longitudinal direction dimension of the tightening tape sample 11s is 10 mm, and the converted value is used as the above-described locking force (N/10 mm). For example, when the longitudinal dimension of the tightening tape sample 11s is 20 mm, the value (= (P135/20 mm) × 10 mm) obtained by dividing the above-described recorded load value P135 by 20 mm and multiplying by 10 mm is used as the above. The locking force (N/10mm).

Further, the locking force in the case of the overlapping form, that is, the locking force (N/10 mm) between the non-muscle side 11-1s of the left side belt 11-1 and the male material 111 of the right side belt 11-2 is measured. The same can be done in the same manner as described above, and thus the description thereof will be omitted.

However, although the disposable diaper 1 of the present embodiment has been specially designed for low-weight children of 3 kg or less, it is considered that the disposable diaper 1 can effectively solve the above-mentioned problems associated with the posture and minimum processing. At the request, it is easier to form a posture, and at the minimum required In the case of the case, the disposable diaper 1 of this embodiment is more effective. Moreover, this situation refers to the situation of lower weight.

Thus, the disposable diaper 1 of the present embodiment is preferably applied to low birth weight infants of less than 2500 g and 1500 g or more, and more preferably to very low birth weight infants of less than 1500 g and 1000 g or more. Good for ultra low birth weight infants up to 1000 grams.

Further, the disposable diaper 1 of the present embodiment is formed to be smaller than the existing disposable diaper 1 for the purpose of low-weight use. For example, the product diaper of the newborn has a product length of 365 mm, and the circumference LHB of the peripheral opening portion HB in the worn state is 304 mm. On the other hand, the product length L1 (Fig. 2) of the disposable diaper 1 of the present embodiment is 210 mm to 330 mm, and the circumference LHB of the peripheral opening portion HB in the worn state is 160 to 295 mm.

Further, the product length L1 is the maximum dimension L1 in the longitudinal direction in the developed state. In addition, the circumferential length LHB of the above-described circumference opening portion HB is measured in a locked state in which the tightening belts 11-1 and 11-2 are in a state in which the tightening belts are overlapped. Details are as follows.

First, as shown in Fig. 8, after the male material 11m of the left side belt 11-1 is locked to the target belt 15 of the front side portion 1a, the male material 11m of the right side belt 11-2 is locked to the left side belt 11-1. In the non-muscle side 11-1 s, the center positions C11-1 and C11-2 in the longitudinal direction of the belts 11-1 and 11-2 are aligned, and the front end 11-2e and the left side of the right side belt 11-2 are provided. Alignment is performed in such a manner that the end 11me of the root side of the 1 mm of the public material 11-1 is aligned. Thereby, the locking state of the tightening band overlap state is obtained.

In this manner, the opening around the crotch portion HB formed in accordance with the locked state is just extended to disappear just in accordance with the contraction generated by the elastic sheet 31 around the crucible. Then, the circumferential length LHB of the opening portion HB around the crucible is measured in the extended state, thereby obtaining the circumferential length LHB.

Incidentally, the length L1 of the product of the low birth weight infant and the circumference LH of the opening HB of the fistula are 310 mm and 273.5 mm, respectively, and the length L1 of the product of the extremely low birth weight and the circumference of the opening HB around the ankle. The LHB was 270 mm and 220 mm, respectively, and the product length L1 of the ultra-low birth weight infant and the circumference LHB of the opening HB around the ankle were 230 mm and 219 mm, respectively.

===Other implementations ===

The embodiments of the present invention have been described above, and the above embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the invention. In addition, the present invention can be modified and improved without departing from the spirit and scope of the invention. For example, the following modifications can be made.

In the above-described embodiment, the elastic member 21 around the foot is a strip-shaped elastic sheet 21 which is linear in the longitudinal direction. However, the shape of the strip-shaped elastic sheet 21 is not limited to the above shape. For example, the end portion of the back side may be curved toward the inner side in the lateral direction as it progresses toward the inner side in the longitudinal direction.

In the above embodiment, the elastic film is exemplified as the elastic surrounding sheet 31, but the invention is not limited thereto. That is, as long as the sheet 31 may have elasticity, and may be a sheet-like member other than an elastic film, for example, a stretchable nonwoven fabric (an elastomer fiber containing a polyurethane fiber or the like, and a stretchable nonwoven fabric according to its own elasticity).

1a‧‧‧ Ventral side

1b‧‧‧Back side

1m‧‧‧胯 lower part

2‧‧‧Top sheet

3‧‧‧ absorber

3c‧‧‧Absorbent core

3cna‧‧‧ space

3cnb‧‧‧ space

3na‧‧‧Low-rigid part (ventral low-rigidity part)

3rs‧‧ ‧ core coated sheet

3nb‧‧‧Low rigid part (low back rigid part)

4‧‧‧ leakproof sheets

6‧‧‧Three-dimensional hem sheets

11ms‧‧‧ side

15‧‧‧Target belt

21‧‧‧ elastic members around the foot

21e2‧‧‧ end

21s1‧‧‧ Short side

21s2‧‧‧ long side

31‧‧‧胴elastic sheet around

31e1‧‧‧ end

31e1e‧‧‧Outer end

A11m21‧‧‧tetragonal area

Central location of C11m‧‧‧

L11m‧‧‧Maximum size

LNC11m‧‧‧ connection line

LOL‧‧‧ overlap

HB‧‧‧胴around opening

Claims (8)

A disposable diaper for a low-weight child-expanding type of 3 kg or less, which has a ventral side portion of a ventral side of a low-weight child placed in a horizontal direction of 3 kg or less, and is placed in the sputum of the low-weight child. a lower portion and a back side portion disposed on the back side of the low-weight child in the lateral direction, and the front side portion, the crotch portion, and the back side portion are arranged in a longitudinal direction orthogonal to the lateral direction, and are transmitted through The locking portions of the tightening belts provided at the end portions of the back side portion in the lateral direction are respectively locked to the front side portions, thereby forming a peripheral opening portion and a pair of An opening around the foot, characterized in that the elastic member around the foot is provided at each of the two sides in the lateral direction of the crotch portion in the longitudinal direction, and the opening around the leg is along the longitudinal direction And a periorbital elastic sheet provided on the back side portion and extending toward both sides in the lateral direction for contracting the opening around the crotch in the lateral direction; in the unfolded state of the disposable diaper Each of the end portions in the lateral direction of the surrounding elastic sheet is located at the same position in the lateral direction as the position of the end portion of the elastic member in the longitudinal direction on the back side of the closest foot, or more In the outer side in the lateral direction, the outer peripheral elastic sheet is disposed so as to straddle the center position of the locking portion of the tightening band in the longitudinal direction in the longitudinal direction. A disposable diaper for a low-weight child with an unfolded type of 3 kg or less as described in the first paragraph of the patent application, wherein The end portion of the elastic sheet around the crucible is connected to the closest elastic band at the outer end portion of the end portion in the lateral direction. A disposable disposable diaper for a low-weight child-expanding type of 3 kg or less as described in claim 1 or 2, wherein a direction orthogonal to both the longitudinal direction and the lateral direction is along the aforementioned In the thickness direction of the diaper in an unfolded state, the disposable diaper has an absorbent body extending in the longitudinal direction over the front side portion, the crotch portion, and the back side portion, and a non-absorbent body from the thickness direction a leakage preventing sheet covering the muscle side; when viewed from the thickness direction, the elastic sheet surrounding the crucible is overlapped with both the absorber and the leakage preventing sheet, and each end portion of the elastic sheet around the crucible in the lateral direction is It is located at the same position as the position of the edge in the lateral direction of both the absorber and the leakage preventing sheet, or is located outside the lateral direction. The disposable diaper for a low-weight child-expanding type of 3 kg or less according to any one of claims 1 to 3, wherein the absorbent body corresponds to the position of the back side portion. The back side low-rigidity portion having a lower rigidity than the surrounding portion, and the aforementioned back-side low-rigidity portion, when viewed from the aforementioned thickness direction, overlaps with the aforementioned elastic surrounding sheet. The disposable diaper for a low-weight child-expanding type of 3 kg or less according to any one of claims 1 to 4, wherein the ventral side portion has the aforementioned side portion of the back side portion a target area in which the aforementioned locking portions of the aforementioned tightening straps are respectively locked; The absorbent body has a lower ventral low rigidity portion having a lower rigidity than a peripheral portion corresponding to the position of the front side portion; and the ventral low rigidity portion overlaps the target region when viewed from the thickness direction . The disposable diaper for a low-weight child-expanding type of 3 kg or less according to any one of claims 1 to 5, wherein the shape of the locking portion of the tightening band is the aforementioned The inner side of the lateral direction has a side, and the elastic member around the foot has a strip-shaped elastic sheet having a long side of one pair in the longitudinal direction and a short side of the pair in the lateral direction; Among the short sides, the short side of the back side and the inner side of the locking portion of the tightening belt in the lateral direction are a quadrangular region defined by the opposite side, and a part of the elastic sheet around the crucible is present. The disposable diaper for a low-weight child-expanding type of 3 kg or less according to any one of claims 1 to 6, wherein the elastic sheet around the pimple has an opening around the cymbal An effective portion that contracts in the lateral direction and an ineffective portion that cannot shrink the opening around the crucible in the lateral direction, and the ineffective portion is located at each end portion of the elastic sheet in the lateral direction of the crucible, and is located at the end portion Between the tightening strap and the aforementioned effective portion. A disposable diaper for a low-weight child-expanding type of 3 kg or less according to any one of claims 1 to 7, wherein one end of each of the aforementioned end portions is tightened Band set to 1st The belt is configured such that the other end of the tightening band is the second belt, the locking portion of the first belt is locked to the front side portion, and the locking portion of the second belt is overlapped and locked. In the case of the non-locking portion side of the first belt, the locking force of the locking portion of the second belt and the non-locking portion side of the first belt is 0.1 (N/10 mm). And the locking force (N/10 mm) of the locking portion and the front side portion of the first belt, and the locking force of the locking portion and the front side portion of the second belt (N/) 10 mm), which is larger than the locking force (N/10 mm) of the surface of the first belt on the non-locking portion side and the locking portion of the second belt, respectively, in the longitudinal direction of the first belt The center position is aligned so as to coincide with the center position of the second belt in the longitudinal direction, and when the locking portion of the second belt is overlapped and locked on the non-locking portion side of the first belt The first belt and the second belt are set such that the locking portions of the second belt extend beyond the first belt on both sides in the longitudinal direction.