JP2004275558A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper which is excellent in fitting around waist and leg openings, offers a good fitting, and prevents leakage from the leg openings infallibly. <P>SOLUTION: This disposable diaper is a foldout one and comprises a waistband part 10 continuously formed on both side edges of a back side part A, a band attaching part 11 at least formed on one of the edges with which the left and right waistband parts 10 could be attached, and a diaper attaching part 12 formed on both sides of a front side part B with which the front side part B could be attached to the left and right waistband parts 10 when putting on the diaper. The left/right waistband part 10, each has an elastic part which could expand in a longitudinal direction of the diaper, at least on the part where the diaper attaching part 12 is attached. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disposable diaper that has excellent fit at waist and around a leg, provides a good fit, and can reliably prevent leakage from around the leg.
[0002]
Problems to be solved by the prior art and the invention
Conventionally, as a disposable disposable diaper, it has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between these sheets, and is placed on the abdomen of the wearer during use. Diapers having a ventral part located on the back and a dorsal part located on the back side are widely used, and as an adult disposable diaper that can be worn while standing, the above- A waist band portion is continuously provided on each of the left and right side edges, and a band fastening portion is provided at a tip portion of at least one of the left and right waist band portions, and the left and right waist band portions are worn by the band fastening portion. There is known a device that can be fixed on the abdomen of a person (see Patent Document 1).
[0003]
Further, in a disposable diaper having such a waistband portion, a leg portion elastic expansion / contraction member is disposed on a leg portion disposed around a leg in order to enhance fit to a wearer (see Patent Document 2). ).
However, in conventional disposable diapers having a waistband portion, due to the characteristics of the form and the mounting method, the leg length is determined by the length of the crotch, and the leg portion arranged around the leg is restricted. It is difficult to achieve both a sufficient fit of the waist and the leg around and a good fit that does not excessively tighten the leg around by merely arranging the leg elastic member.
In addition, as a disposable diaper having a waistband portion, there has been proposed a disposable diaper in which an elastic elastic portion is provided in a waistband portion in order to improve fit in a diaper circumferential direction (see Patent Document 2). There is no known diaper in which a waistband portion is provided with an elastic elastic portion that expands and contracts to improve fit around the waist and legs.
[0004]
[Patent Document 1]
JP-A-5-184623 [Patent Document 2]
JP-A-9-290002
Accordingly, an object of the present invention is to provide a disposable diaper that has excellent fit at the waist and around the leg, provides a good fit, and can reliably prevent leakage from around the leg.
[0006]
[Means for Solving the Problems]
In the present invention, a waist band portion is continuously provided on both side edges of one portion in the longitudinal direction, and a band fastening portion is provided at a tip portion of at least one of the left and right waist band portions. The diaper fastening portion is provided on both sides of the other portion in the longitudinal direction, and the left and right waistband portions are fastened to the wearer's abdomen or back by the band fastening portion, By a diaper fastening portion, a deployment type disposable diaper that is configured to fasten the other portion to the left and right waistband portions and wear the left and right waistband portions, at least, The above object has been achieved by providing a disposable diaper having an elastic expansion and contraction portion that expands and contracts in the diaper longitudinal direction at a portion where the diaper fastening portion is fixed.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. A disposable diaper 1 as one embodiment of the present invention is an adult diaper of a type that can be worn while standing, and as shown in FIG. Back sheet 3 and a liquid-retentive absorber 4 interposed between the two sheets 2 and 3 and are formed substantially vertically. The disposable diaper 1 has a back part (one part in the longitudinal direction) A located on the back side of the wearer during use and an abdominal part (the other part in the longitudinal direction) B located on the ventral side. .
[0008]
The absorbent body 4 is sandwiched and fixed between the top sheet 2 and the back sheet 3, and the waist part 5 and the leg part 6 in the peripheral part of the absorbent body 4 have waist parts for fitting each part to a diaper wearer. An elastic member 51 and a leg elastic member 61 are provided.
A three-dimensional guard 7 is formed on each of the left and right sides in the longitudinal direction of the disposable diaper 1. A three-dimensional guard elastic member 71 is disposed at a free end of the three-dimensional guard 7 to form a gather.
[0009]
Waist band portions 10, 10 are continuously provided on both left and right side edges of the back side portion A, respectively, and a band fastening portion 11 is provided at a distal end portion of at least one of the left and right waist band portions 10, 10. 2 and 3, the left and right waistband portions 10a and 10b can be fastened to the wearer's abdomen by the band fastening portion 11, as shown in FIGS. It is.
[0010]
As shown in FIG. 3, diaper fastening portions 20 for fastening the abdominal portion B to the connected waistband portion 10 are provided on both sides of the abdominal portion B on the side of the topsheet 2. 20 are provided.
Each member can be formed using a known material used for a conventional disposable diaper without any particular limitation.
[0011]
Each of the waistband portions 10 has an elastic elastic portion 12 that expands and contracts in the diaper longitudinal direction.
The elastic expansion / contraction portion 12 is provided at a portion where the diaper fastening portion 20 is fastened. However, a sufficient deformation area is secured around the portion where the diaper fastening portion 20 is fastened, and the leg-around fit is ensured. In order to ensure that the improvement effect is exhibited, the width W1 (see FIG. 1) in the diaper width direction is preferably larger than the width W2 (see FIG. 1) of the diaper fastening portion 20, and the diaper longitudinal direction. It is preferable that the length L1 (see FIG. 1) is larger than the length L2 (see FIG. 1) of the diaper fastening portion 20. From the same viewpoint, the ratio (W1 / W2) of the width W1 to the width W2 is preferably 1.5 to 10, and the ratio (L1 / L2) of the length L2 to the length L1 is 1.5 to 5 Is preferred.
In the case where two diaper fastening portions are provided on both sides of the abdominal portion B, the length and area of the diaper fastening portion are values including a region located between the two fastening portions. And
[0012]
The area of the elastic elastic part 12 is preferably 2 to 50 times the surface area of the corresponding diaper fastening part 20, and the area of the elastic elastic part 12 is preferably 8 cm ² or more.
[0013]
The elastic elastic portion 12 in the present embodiment is formed only on a part of the waistband portion 10 in the diaper width direction (the same as the extending direction of the waistband portion) 10. More specifically, the elastic elastic part 12 is formed at a position slightly closer to the base end 13 than the center of the waistband part 10 in the extending direction and separated from the base end 13 and the tip end 14. It is preferable that the elastic elastic portion 12 is formed such that the distance from the base end 13 of the waistband portion 10 is within a range of 10 to 70% of the entire length of the waistband portion 10 in the extending direction.
[0014]
It is preferable that the elastic expansion and contraction portion 12 satisfy the following conditions (1) and / or (2) from the viewpoint of improving the fit. The elastic elastic part 12 can be formed using a sheet composed of a single layer or a plurality of layers.
{Circle around (1)} The stress at the time of 50% extension in the direction corresponding to the diaper longitudinal direction is smaller than the stress at the time of 50% extension in the direction corresponding to the diaper width direction.
{Circle around (2)} The elongation at break in the direction corresponding to the diaper longitudinal direction is larger than the elongation at break in the direction corresponding to the diaper width direction.
[0015]
<Method of measuring stress at 50% elongation>
When measuring the stress in the direction corresponding to the longitudinal direction of the diaper, the elastic stretch portion 12 (or the sheet material for forming the elastic stretch portion 12) is set to a size of 100 mm in the longitudinal direction of the diaper and 25 mm in the width direction of the diaper. Cut out and use this as a test piece. When measuring the stress in the direction corresponding to the diaper width direction, the elastic stretch part 12 (or the sheet material for forming the elastic stretch part 12) is set to a size of 25 mm in the longitudinal direction of the diaper and 100 mm in the width direction of the diaper. Cut out and use this as a test piece.
The obtained test piece was fixed between the chucks of a tensile tester (Tensilon RTC-1150A, manufactured by Orientec Co., Ltd.), and the test piece was placed in the longitudinal direction with an initial inter-chuck distance (natural length) of 30 mm. And a tensile rate of 300 mm / min and a maximum strain of 30 mm (100% strain) to obtain a hysteresis curve.
From the obtained hysteresis curve, a stress when a strain amount of 50% is given (when the strain is distorted by 15 mm) is obtained, and the value is defined as a stress at the time of 50% extension.
[0016]
<Method of measuring elongation at break>
When measuring the elongation at break in the direction corresponding to the diaper longitudinal direction and the direction corresponding to the diaper width direction, a test piece is obtained in the same manner as when measuring the stress at the time of 50% elongation in the same direction. .
Then, the obtained test piece is fixed between chucks of a tensile tester (Tensilon RTC-1150A, manufactured by Orientec Co., Ltd.), and the test piece is placed in the longitudinal direction with an initial distance between chucks (natural length). ) The elongation at the time of pulling and breaking at a condition of 30 mm and a pulling speed of 300 mm / min is defined as the elongation at break. In addition, the elongation at the time of fracture | rupture at the time of extending | stretching to twice the natural length is 100%.
[0017]
It is preferable that the sheet constituting the elastic expansion and contraction portion 12 has a stress at 50% elongation in the direction corresponding to the diaper longitudinal direction of 50 to 250 cN, particularly 100 to 200 cN. Further, the elongation at break in the direction corresponding to the longitudinal direction of the diaper is preferably 50 to 300%, particularly preferably 100 to 200%.
[0018]
The elastic expansion and contraction portion 12 in the present embodiment is a laminated sheet formed by laminating a fiber assembly that can be extended in the diaper longitudinal direction on one or both surfaces of a sheet made of an elastomer material.
As the elastomer material, natural rubber, butadiene, synthetic rubber such as isoprene and the like are preferably used. As the sheet made of the elastomer material, an elastic film obtained by forming the elastomer material into a film, a sheet formed by forming an elastic fiber made of the elastomer material into a net shape or forming a nonwoven fabric, and the like are preferably used. As a fiber aggregate that can be stretched in the diaper longitudinal direction, a nonwoven fabric having an extensibility itself without performing secondary processing such as formation of a slit, for example, a nonwoven fabric made of spandex, or the like, has an extensibility itself. Those having no extensibility by secondary processing such as formation of slits can be used.
[0019]
It is preferable that at least the surface on the back sheet side of the elastic expansion and contraction portion 12 is made of a material to which the convex member of the mechanical fastener can directly engage. Examples of such sheet materials include nonwoven fabrics, for example, thermal bond nonwoven fabrics, needle punched nonwoven fabrics, spunlaced nonwoven fabrics, and the like. In addition, the left and right waistband portions 10, 10 at least at the portion other than the elastic expansion and contraction portion 12, particularly at the portion where the band fastening portion is fastened, at least the surface on the back sheet side directly engages the convex member of the mechanical fastener. It is preferable to be made of a sheet material that can be combined.
The band fastening portion 11 and the diaper fastening portions 20, 20 are preferably formed by a convex member of a mechanical fastener having a large number of anchor-shaped or hook-shaped male engagement members disposed on the surface thereof, Examples of the convex member of the mechanical fastener include “Magic Tape (registered trademark)” (manufactured by Kuraray), “Quicklon (registered trademark)” (manufactured by YKK), and “Majicross (registered trademark)” (Kanebo Bell Touch) Commercially available products such as a product manufactured by Toshiba Corporation can be used.
[0020]
The waistband portion 10 in the present embodiment has a substantially belt-like shape whose width gradually decreases from its base end 13 to its tip end 14. Then, from the base end 13 side to the tip end 14 side, an elastic elastic portion 15 which expands and contracts in the diaper width direction, a region 16 having no elastic elasticity, the elastic elastic portion 12 and a region 17 having no elastic elasticity. Are formed in this order. As the elastic elastic part 15, a laminated sheet forming the elastic elastic part 12 is used by being rotated by 90 °. The regions 16 and 17 are made of non-woven fabric having no slit.
The two waistband portions 10 are formed by combining the elastic sheet 15, the region 16, the elastic member 12, and the region 17, which are connected in this order, to the left and right side edges 30 of the body portion of the back portion A. , 30 by a known joining method such as an adhesive, a heat seal, and an ultrasonic seal.
[0021]
In order to wear the disposable diaper 1, first, as shown in FIG. 2, the back side A is brought into contact with the back side of the wearer 30, and the waistband portions 10 a and 10 b are placed on the abdomen of the wearer 30. come. Then, one of the waistband portions 10a is overlapped with the other waistband portion 10b, and the band fastening portion 11 provided at the tip of the one waistband portion 10a is attached to the back surface of the other waistband portion 10b. Engage and fasten to the seat side. Then, the abdominal part B is pulled up to the abdominal side along the crotch of the wearer 30, and as shown in FIG. 3, the diaper fastening parts 20, 20 are placed on the elastic elastic parts 12 of both the waistband parts 10, 10. To engage.
In the disposable diaper 1 of the present embodiment, the back part A is brought into contact with the abdomen of the wearer 30, and both the waistband parts 10, 10 can be fastened on the back of the wearer 30 to be worn. .
The disposable diaper 1 of the present embodiment can be easily attached in this manner.
[0022]
According to the disposable diaper of the present embodiment, the waistband portion has the elastic elastic portion 12 that elastically expands and contracts in the longitudinal direction of the diaper, and the diaper fastening portion 20 is fixed to the elastic elastic portion 12 to be worn. As a result, a good fit is obtained around the legs, and leakage from the legs can be reliably prevented.
That is, when a conventional general diaper performs an operation of raising the upper body with the legs closed, the diaper is pulled by being pinched by the legs, causing a gap, and as a result, a gap is easily generated around the legs. . However, in the diaper according to the present embodiment, the elastic expansion and contraction portion 12 absorbs the displacement of the diaper being pulled, preventing the diaper from shifting, and maintaining a good fit around the legs. Further, when the abdominal girth changes with a change in the posture such as standing or sitting, as shown in FIG. 4, a force is applied in the direction of the combined vector of F1 and F2 or F1 and F3. Since the change of the abdominal circumference is separated and absorbed in the respective vector directions of F1, F2 and F3 by the function of 12, compression of the abdomen hardly occurs.
[0023]
The deployable disposable diaper of the present invention is not limited to the embodiment described above, and various changes can be made without departing from the spirit of the present invention.
For example, the waist elastic member 51, the leg elastic member 61, and the three-dimensional guard 7 in the above embodiment can be omitted.
In addition, the waistband portion 10 in the above embodiment has the elastic elastic portion 15 that expands and contracts in the diaper width direction on the base end portion 13 side, but the elastic elastic portion 15 that expands and contracts in the diaper width direction is omitted. You can also.
Further, in the waistband portion 10 in the above embodiment, the elastic expansion and contraction portion 12 is formed only in a part of the extension direction, however, the half of the waistband portion 10 closer to the base end 13 than the center in the extension direction. May be used as the elastic elastic part 12, or the entire waistband part 10 may be used as the elastic elastic part 12.
[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION The disposable diaper of this invention is excellent in the fitting property of a waist and a leg area, and a favorable fitting feeling is obtained and the leak from a leg area can be prevented reliably.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which one embodiment of the disposable diaper of the present invention is expanded in a plane.
FIG. 2 is a view showing a state in which the disposable diaper of FIG. 1 is being worn.
FIG. 3 is a view showing a state in which the disposable diaper of FIG. 1 is mounted.
FIG. 4 is a view for explaining the operation and effect of the disposable diaper of FIG. 1, and is a view showing a state in which the diaper is worn as viewed from the side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Waist part 6 Leg part 7 Solid guard 10 Waist band part 11 Band fastening part 12 Elastic elastic part which expands and contracts in the diaper longitudinal direction 15 Elastic elastic part which expands and contracts in the diaper width direction 20 Diaper fastening part A Back side (one part in the longitudinal direction)
B Ventral part (the other part in the longitudinal direction)

Claims (5)

A waistband portion is continuously provided on both side edges of one portion in the longitudinal direction, and a band fastening portion is provided at a tip portion of at least one of the left and right waistband portions. Diaper fastening portions are provided on both sides of the other portion of the diaper, and the left and right waistband portions are fastened to the wearer's abdomen or back by the band fastening portion, and the diaper fastening portion is provided. According to the deployment type disposable diaper, the other part is fixed to the left and right waistband parts to be worn.
A disposable diaper in which the left and right waistband portions each have elastic elastic portions that expand and contract in the diaper longitudinal direction at least at portions where the diaper fixing portions are fixed. 2. The disposable diaper according to claim 1, wherein the elastic elastic portion has a stress at 50% extension in a direction corresponding to the diaper longitudinal direction smaller than a stress at 50% extension in a direction corresponding to the diaper width direction. 3. The disposable diaper according to claim 1, wherein the elastic stretch portion has a breaking elongation in a direction corresponding to the diaper longitudinal direction larger than a breaking elongation in a direction corresponding to the diaper width direction. 4. The disposable diaper according to any one of claims 1 to 3, wherein the elastic elastic portion is formed only on a part of the waistband portion in the diaper width direction. The disposable diaper according to any one of claims 1 to 4, wherein the waistband portion has a second elastic elastic portion that expands and contracts in a diaper width direction.

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