JP2005198784A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper capable of being prevented from slipping down without tightening the skin of a user excessively, and capable of being easily worn by a novel wearing method such that the hand is inserted in each of a leg opening parts to draw out a leg. <P>SOLUTION: In this pantie-shaped disposable diaper equipped with an absorbent body 4 having liquid holding properties, having an abdominal part A, a crotch part C and a back part B and constituted so that both side edge parts of the abdominal part A and both side edge parts of the back part B are joined to form a waist opening part and a pair of leg opening parts, elastic members 71a are arranged between the peripheral edge end 72 of the waist opening part at the front and rear ends of the absorber and elastic members 71b inclined so as to be separated from the peripheral edge end 72 of the waist opening part as they direct outward in the lateral direction of the diaper from inside are provided to the regions H on the side of the crotch part C from the positions of the front and rear ends of the absorber 4 in the abdominal part A and/or the back part B and outside the positions of both side edges of the absorber 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pants-type disposable diaper.

Conventionally, it has an abdominal part, a crotch part and a dorsal part, and both side edges of the abdominal part and both side edges of the dorsal part are joined to form a waist opening and a pair of leg openings. There are known pants-type disposable diapers. This type of disposable diaper was made possible by letting a standing infant pass one leg through each leg opening.
In other words, conventional pants-type disposable diapers are intended for infants who can stand up to themselves, or at least parents who can stand up or stand by holding something, and their necks are not set up. It has been unthinkable to use for newborns who cannot.

  Moreover, the disposable diaper which distribute | arranged the elastic member in the form divided | segmented into the left and right of the absorber is known as an underpants type disposable diaper (refer patent document 1). However, this disposable diaper is still not sufficient from the viewpoint of achieving both fit to the wearer and preventing slippage.

Japanese Patent Laid-Open No. 2001-478

  The object of the present invention is to prevent the diaper from slipping off without excessively tightening the wearer's skin, and to easily put the hand on the leg opening and pull out the foot for easy attachment to the baby. An object of the present invention is to provide a pants-type disposable diaper that can be worn.

  The present invention comprises a top sheet, a back sheet, and an absorbent body interposed between both sheets, and has a ventral side part, a crotch part, and a dorsal side part, and both side edges of the ventral part and both side edges of the back side part. In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed, the ventral side part and / or the back side part includes a peripheral edge of the waist opening part. An elastic member is disposed between the front and rear ends of the absorber, and the crotch side of the abdomen and / or the back side of the absorber is located on the crotch side and both sides of the absorber. The object is achieved by providing a disposable diaper having an elastic member that is inclined away from the peripheral edge of the waist opening as it goes from the inner side to the outer side in the diaper width direction on the outer side from the edge position. It is.

The disposable diaper of the present invention can prevent the diaper from slipping without excessively tightening the wearer's skin, and has been put to sleep by a novel wearing method in which a hand is put into the leg opening and a leg is pulled out for wearing. It can be easily attached to a baby.
The disposable diaper of the present invention is particularly suitable for newborns, and its wearing method is not particularly limited, but it can be easily put on a sleeping newborn by the above-mentioned wearing method. Have advantages.

The present invention will be described below based on preferred embodiments with reference to the drawings.
The disposable diaper 1 as one embodiment of the present invention is a pants-type diaper as shown in FIG. As shown in FIGS. 2 and 3, the diaper 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent 4 interposed between both sheets 2 and 3. It comprises an absorbent main body 10 and an exterior body 5 that is positioned on the outer side (non-skin contact surface side) of the absorbent main body 10 to jointly fix the absorbent main body 10 and is worn by the wearer's stomach. It has an abdominal side A disposed on the side, a back side B disposed on the back side, and a crotch C positioned therebetween. Then, as shown in FIG. 1, both side edges of the ventral side A and both side edges of the back side are joined together by a known joining means such as heat seal, high frequency seal, ultrasonic seal, etc. Seal portions 50 and 50 are formed, and the diaper 1 is formed with a waist opening 7 and a pair of leg openings 8 and 8 by the joining.

  As shown in FIG. 2, the absorbent main body 10 has a vertically long rectangular shape, the longitudinal direction of which coincides with the vertical direction of the diaper 1 (also referred to as the vertical direction of FIG. 2 or the diaper longitudinal direction), and is externally covered by a known joining means. It is joined to the central portion in the width direction of the body 5. The absorber 4 has an hourglass shape in which the central portion in the longitudinal direction is constricted, and is sandwiched and fixed between the top sheet 2 and the back sheet 3.

  As shown in FIGS. 2 and 3, the absorbent main body 10 is formed with a pair of first three-dimensional guards 6A, 6A and second three-dimensional guards 6B, 6B extending in the longitudinal direction on the left and right sides thereof. As shown in FIG. 3, the first three-dimensional guard 6 </ b> A has a free end 61 </ b> A on the inner side in the width direction of the absorbent main body 10 and a fixed end (rising base end) 62 on the outer side. . An elastic member 63A is disposed in the vicinity of the free end 61A so as to be extendable and retractable along the free end 61A. On the other hand, the second three-dimensional guard 6 </ b> B has a fixed end 64 with the exterior material 5, and has a free end 61 </ b> B on the outer side in the width direction than the fixed end 64. In the vicinity of the free end 61B, an elastic member 63B is disposed so as to be stretchable along the free end 61B.

  As shown in FIG. 3, the exterior body 5 is composed of a laminate of an outer layer sheet 51 and an inner layer sheet 52. The outer layer sheet 51 forms the outermost surface of the diaper 1, and the inner layer sheet 52 is disposed adjacent to the outer layer sheet 51 on the inner surface side of the diaper 1. The outer layer sheet 51 has extension portions 51 a extending in the front-rear direction from the front and rear end edges of the inner layer sheet 52, and the extension main body 10 is arranged on each of the extension portions on the inner layer sheet 52 of the exterior body 5. After that, the absorbent body 10 is folded and bonded to the absorbent body 10 so as to cover the front and rear ends of the absorbent body 10.

  As shown in FIGS. 1 and 2, between the peripheral edge 72 of the waist opening 7 and the longitudinal ends (front and rear ends) 41, 42 of the absorbent body 4 in the abdominal part A and the back part B, respectively. Is provided with an elastic member 71.

  The elastic member 71 in this embodiment is a waist elastic part 71a functioning as an elastic member disposed between the peripheral edge 72 of the waist opening and the front and rear ends of the absorber, and as it goes from the inner side to the outer side in the diaper width direction. And an extending portion 71b that functions as an elastic member that is inclined so as to be separated from the peripheral edge of the waist opening. The waist elastic portion 71a extends substantially parallel to the waist opening in each of the ventral portion A and the back portion B, and the extending portion 71b is not parallel to the waist opening and the peripheral edge, that is, is inclined. It extends. The extending part 71b is inclined so as to approach the crotch part from the inside to the outside of the diaper width direction.

  The waist elastic part 71a mainly gives the stretchability of the circumferential direction to the opening peripheral part of the waist opening part 7. As shown in FIG. In the present embodiment, the portion F (see FIG. 2) inward from the positions of the side edges 43, 43 of the absorber is disposed substantially parallel to the peripheral edge 72.

  On the other hand, as shown in FIG. 2, the extending portion 71 b is located on the crotch C side from the positions of the front and rear ends 41, 42 of the absorbent body 4 and outside the positions of the side edges 43, 43 of the absorbent body 4. That is, in the diaper longitudinal direction, it is located in the region E in FIG. 2, and in the diaper width direction, at least a part of the portion H is located in the region G in FIG. It exists in the state which inclined so that it might leave | separate from the peripheral edge of a waist opening part as it goes. In the present embodiment, all the extending portions 71b of the elastic member 71 are inclined at the portion H as described above.

  In the present embodiment, the elastic member 71 is disposed between the peripheral edge 72 of the waist opening 7 and the front and rear ends 41 and 42 of the absorber 4 (here, the front and rear ends include the extension line in the diaper width direction). The elastic waist portion 71a and the extending portion 71b arranged in the portion H are continuous with the central portion through a portion located in the region D and in the region G. In addition, the boundary of the area | region D and the area | region E is a line in which the front-and-back end of an absorber is located in the longitudinal direction of a diaper.

  The extending portion 71b of the elastic member 71 is fixed to the exterior body 5 in an extended state, and thereby, a gather having a stretchable property in an oblique direction is formed in the portion H. The gathers can provide an appropriate fit to the wearer's waist, and can also prevent slipping and excrement leakage. For low-age infants, it is preferable that the area from the peripheral edge 72 to 20 mm downward is the waist portion D.

  In order to obtain the effect as described above, the waist elastic portion 71a and the extending portion 71b may be discontinuous. However, it is preferable that the waist elastic portion 71a and the extending portion 71b are continuous as in the above-described embodiment from the viewpoint of further preventing slippage.

The extending part 71b of the elastic member 71 extends toward the opening edge part 82 of the leg opening part 8, and the front end of the elastic member 71 divides the ventral part A or the back part B into two diapers in the longitudinal direction. It reaches the crotch C side from the center line La or the back side center line Lb. In FIG. 2, the line at the tip of the extended portion 51a of the outer layer sheet folded back to the inner layer sheet side overlaps the ventral side center line La and the back side center line Lb.
The leg opening 8 in the diaper 1 is provided with leg elastic members 81 for forming leg gathers along the opening edge 82. In the present embodiment, the extending portion 71b of the elastic member 71 reaches a position where the distance between the tip thereof and the leg elastic member 81 is within 3 cm, and the tip and the opening of the leg opening are formed. The distance from the peripheral edge 82 has reached a position within 5 cm.

In the present embodiment, as shown in FIG. 2, a plurality of the elastic members 71 are arranged on the abdominal side A and the back side B, respectively, and the distance between the elastic members in the extending portion 71 b is the center. It is wider than the interval between the elastic members 71 in the portion. Thereby, since a wearer's waist circumference is pressed down by a gentle force over a wide range, slipping can be prevented without giving the wearer a tight feeling.
The extended portion 71b of the elastic member has a waist opening over a length (measured along the elastic member) of 1 cm or more, preferably 2 cm, in a diaper (see FIG. 2) in the expanded and extended state. It is preferable that the angle α formed with the peripheral edge 72 of the portion 7 is in the range of 5 to 85 °, particularly in the range of 10 to 80 °.

The diaper 1 of this embodiment is for newborns, and it is preferable that the crotch length is 220 mm or less. The length of the crotch is ½ of the total length LT (see FIG. 2) of the expanded and expanded state.
Here, the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape.

  The elastic member 71 and the leg elastic member 81 are both clamped and fixed between the outer layer sheet 51 and the inner layer sheet 52 constituting the exterior body 5 in an expanded state.

  The method of attaching the diaper 1 of the present embodiment to a baby or the like is not particularly limited, but can be easily applied to a baby lying on his back, particularly a newborn, for example, by the following attachment method.

(Installation method)
As shown in FIG. 5 (a), one hand is inserted into one leg opening 8, and one leg is grasped by that hand, and the leg is opened as shown in FIG. 5 (b). Pull out from the section. Then, as shown in FIG. 5C, the other leg is similarly pulled out from the other leg opening. When both feet pass, the diaper is pulled up to the wearer's waist as shown in FIG. In this way, the diaper 1 can be easily attached to a low-age child or the like who is lying on his back.

According to the diaper 1 of this embodiment, the slippage of the diaper can be prevented without excessively tightening the wearer's skin.
That is, due to the contraction action of the extending portion 71b of the elastic member 71, the portion where the extending portion 71b is arranged is lightly swollen to the outer surface side, and the pressure applied to the wearer's skin is reduced. It can prevent excessive tightening of the skin.
On the other hand, the upper end portion of the diaper side part actively enters toward the center direction of the waist opening portion by the contraction action of the extending portion 71b, so that the overall tightening force on the wearer's waist can be relatively suppressed. However, sufficient slippage prevention properties can be obtained. When the upper end of the diaper side is in contact with the upper part of the pelvis, it is particularly excellent in slipping off.

  Further, for example, when the diaper is mounted by the above-described preferable mounting method, the diaper can be relatively easily extended by the hand inserted into the diaper through the leg opening, and the hand can be extended by the pressure from the waistline. Since the free movement is not hindered, the operation of inserting the hand from the leg opening and grasping the foot can be performed very smoothly. As described above, the diaper 1 of this embodiment can be easily attached to a sleeping baby by a novel wearing method in which a hand is put into the leg opening and a leg is pulled out for wearing.

  In the diaper 1 of the present embodiment, as shown in FIG. 1, in the natural state of the diaper (a state where no external force is applied), the upper end of the side part of the disposable diaper protrudes upward due to the contracting action of the elastic member 71. Protrusions P and P that are reminiscent of animal ears are formed at the upper end of the side portion. Thereby, when putting on a diaper by the said mounting method, since a wearer's (parents etc.) hand is caught, it is easy to make it wear.

As a material which comprises each part of the diaper 1 of this embodiment, what is normally used in the said technical field can be especially used without a restriction | limiting.
For example, as the surface sheet 2, a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used. As the back sheet 3, a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used. As the absorbent body 4, a product obtained by wrapping a mixed fiber of fluff pulp and superabsorbent polymer particles with tissue paper, nonwoven fabric or the like (hereinafter referred to as packaging material) can be used. As the sheet constituting the three-dimensional guard, a water-repellent nonwoven fabric is preferably used. As the outer layer sheet 51 and the inner layer sheet 52, nonwoven fabrics produced by various production methods are preferably used.

As the elastic member 71 and the leg elastic member 81, various known elastic members can be used. For example, each elastic member has a thread-like shape (thread rubber or the like) or a belt-like shape having a predetermined width ( Flat rubber, etc.), thin film-like materials and the like. The elastic member can be made of natural rubber, synthetic rubber such as styrene-butadiene, butadiene, isoprene, or neoprene, EVA, stretchable polyolefin, urethane. Etc.
As the elastic member 71, it is preferable to use a thread-like member (thread rubber or the like) or a belt-like member having a predetermined width (flat rubber or the like).

  It is preferable that the absorbent body 4 has a bending rigidity of 1 to 25 cN / 50 mm, particularly 2 to 20 cN / 50 mm, because it is gentler to delicate skin at a young age and fits so as not to slip off. The bending rigidity includes rigidity in the longitudinal direction of the diaper and bending rigidity in the width direction, but at least the bending rigidity in the width direction is preferably within the above range.

The bending rigidity of the absorber 4 can be measured as follows.
[Measurement method of bending stiffness]
The measurement is performed using a Tensilon tester [RTC-1150A manufactured by Orientec Co., Ltd.] in accordance with JIS standard K7171 method (plastic-bending property test method) (R1 = 5.0 ± 0). 0.1 mm, R2 = 5.0 ± 0.2 mm).
The test piece is placed so as to pass between both edges of the support base where the edge span L is 50 mm, and the tip of the indenter is arranged so as to slightly touch the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range: 200 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm).

[Method for preparing test piece]
A test piece takes out the absorber containing a packaging material from an absorbent article, and cuts out from the center part of the longitudinal direction and the width direction in the rectangular shape of 50 mm in a diaper longitudinal direction, and 80 mm in the width direction. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. The test piece is bridged between both edges, with the long sides thereof aligned in the direction from one edge to the other. When measuring the bending rigidity in the diaper width direction, a test piece having a diaper longitudinal direction of 80 mm and a width direction of 50 mm is cut out. 50 mm in the unit of bending stiffness value, when the absorbent body including the mount cannot be taken out from the test piece absorbent article, measure the stiffness value including materials such as non-woven fabric and film, and the stiffness value of each material. The absorber stiffness value is obtained by calculating the stiffness value of the absorber.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the elastic member 71 may have the extending portion 71b described above only on one of the ventral side portion A and the back side portion B. Further, only one elastic member 71 may be disposed on the abdominal side and / or the back side, or a plurality of (for example, 2 to 5) elastic members 71 may be disposed. In the case where a plurality of lines are arranged, all or a part of the lines can have an extending portion 71b. Moreover, in the disposable diaper 1 mentioned above, although all the several elastic members 71 were distribute | arranged in the aspect mentioned above, only some elastic members of multiple pieces may be distribute | arranged in the aspect mentioned above. . Furthermore, the waist elastic part 71a and the extension part 71b may be discontinuous.

FIG. 1 is a perspective view showing a disposable diaper as an embodiment of the present invention. FIG. 2 is a plan view showing a developed and extended state of the disposable diaper of FIG. FIG. 3 is a schematic cross-sectional view showing a cross section taken along the line II in FIG. 2 (a cross section of a portion having a minimum crotch width). FIG. 4 is a view showing a state in which the disposable diaper of FIG. 1 is attached to a low-age child, and FIG. 4 (a) is a state in which a hand is inserted into one leg opening from the outer surface side of the diaper, FIG. ) Is a state where one hand of a baby sleeping on its back with its hand is pulled out from one leg opening, and FIG. 4 (c) is the other leg similarly pulled out from the other leg opening. FIG. 4D shows a state where the diaper is pulled up and the mounting is completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 7 Waist opening 71 Elastic member 71b Extension part (part corresponded to the inclined elastic member)
8 Leg opening portion 81 Leg portion elastic member A Abdominal side portion B Dorsal side portion C Crotch portion H The crotch portion side from the position of the front and rear ends of the absorbent body and the outer side from the positions of both side edges of the absorbent body

Claims (5)

Equipped with a front sheet, a back sheet, and an absorbent body interposed between both sheets, and has an abdominal part, a crotch part, and a dorsal part, and both side edges of the abdominal part and both side edges of the back side are joined. In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed,
An elastic member is disposed between the peripheral edge of the waist opening and the front and rear ends of the absorber on the ventral side and / or the dorsal side, and the ventral side and / or the dorsal side Away from the peripheral edge of the waist opening in the diaper width direction from the inner side to the outer side at the crotch part side from the position of the front and rear ends of the absorbent body in the section and outward from the positions of both side edges of the absorbent body Disposable diapers having elastic members inclined like this. The disposable diaper according to claim 1, wherein, in a natural state, a side upper end portion of the disposable diaper protrudes upward. One end portion of the inclined elastic member extends to the crotch side from the abdominal side center line and / or the back side center line that bisects the abdominal side portion and the back side portion in the diaper longitudinal direction. The disposable diaper of Claim 1 or 2 which has reached | attained. A plurality of the elastic members and the inclined elastic members arranged between the peripheral edge of the waist opening and the front and rear ends of the absorber are arranged on the ventral side and / or the back side. The disposable according to any one of claims 1 to 3, wherein a space between the inclined elastic members is wider than a space between elastic members disposed between a peripheral edge of the waist opening and front and rear ends of the absorber. Diapers. The disposable diaper according to any one of claims 1 to 4, wherein a crotch length is 220 mm or less.

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