JP2002224160A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper which can be easily fitted on a wearer regardless of the facing of the back side section wherein a fastening tape is provided to either one of the back side or the belly side of the wearer, and is hard to generate dropping or a urine leakage during the wearing in either case. SOLUTION: A waist section elastic member 7 and a plurality of body peripheral section elastic members 8 are respectively arranged on the waist opening edge section D and the body peripheral section E on the back side section A wherein the fastening tape 5 having a fixing section 51 is provided. Then, at both sides in the longitudinal direction, a pair of leg section elastic members 9 are arranged for this disposable diaper which is substantially longitudinally long. Then, on the internal side of both side edges of the back side section A, a second fixing section 52 is provided. End sections 71, 81 and 91, which are closer to both side edges of the back side section A, of the waist section elastic member 7, the body peripheral section elastic members 8, and the leg section elastic member 9 are respectively located in the vicinity of the second fixing sections 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be easily applied to the back side on which the fastening tape is provided, regardless of the back side or the abdomen side of the wearer. The present invention also relates to a disposable diaper that does not easily leak and urine leakage during wear even when worn.

[0002]

2. Description of the Related Art
As disposable diapers, a deployment type disposable diaper having a fastening tape and a pants-type disposable diaper formed in advance in a pants type are known. It is most commonly used because it is cheap.
However, deployable disposable diapers can be easily worn when the baby is lying quietly on his back, but when the activity becomes active and hesitates to wear it, for example, If so, the mounting is not easy. In such a case, it is conceivable to attach the backside, which is the side on which the fastening tape is provided, so as to face the wearer's abdomen. On the contrary, it is difficult to put on the diaper, and even if the diaper can be put on, there is a problem that the diaper slips down and the urine leaks during the wearing.

[0003] Therefore, an object of the present invention is to allow the user to easily attach the back side, which is the side on which the fastening tape is provided, to either the back side or the abdomen side of the wearer.
In any case, it is an object of the present invention to provide a disposable diaper in which urine leakage hardly occurs due to slippage during wear.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a fastening device having a liquid-permeable top sheet, a liquid-impermeable back sheet, a liquid-retentive absorber interposed between the two sheets, and having a fastening portion. A waist elastic member is arranged over the width direction at the waist opening edge of the back side where the tape is provided, and a plurality of waist elastics are respectively arranged over the width direction at the waist around the back side. In a substantially vertically disposable diaper having a pair of leg elastic members disposed on both sides in a longitudinal direction, a second stop is provided inside both side edges of the back side. An attachment portion is provided, and ends of the waist portion elastic member, the waist portion elastic member, and the leg portion elastic member, which are near both side edges of the back side, are in the vicinity of the second fastening portion. Is characterized by being located in By providing a disposable diaper that is obtained by achieving the above object.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on a preferred embodiment. As shown in FIGS. 1 and 2, a disposable diaper 1 according to one embodiment of the present invention includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid holding member interposed between the two sheets. Absorbent body 4
The fastening tapes 5 and 5 are formed in a substantially elongated shape, and are arranged in order from one end in the longitudinal direction to the other end.
Is a deployable disposable diaper having a back part A, a crotch part C, and an abdominal part B provided with a diaper.

More specifically, the disposable diaper 1 of the present embodiment has an hourglass shape in which both side edges C1 and C1 of the crotch portion C are formed in an arc shape, and the central portion is confined as a whole. I have. The top sheet 2 has a substantially rectangular plan view shape having an outer dimension larger than that of the absorber 4, and is disposed at the center in the width direction of the back sheet 3. The back sheet 3 has an hourglass-shaped outer shape that matches the outer shape of the diaper. The top sheet 2 and the back sheet 3 extend outward beyond both side edges 41, 41 and both end edges 42, 42 of the absorber 4 at both sides and both ends in the longitudinal direction of the diaper, respectively. They are joined to each other at the protrusion. Both side portions in the longitudinal direction of the back sheet 3 extend outward on both sides in the width direction from both side edges of the top sheet 2.

[0007] A pair of three-dimensional gathers 6 and 6 are formed on both sides of the disposable diaper 1 in the longitudinal direction.
Each of the three-dimensional gathers 6 is formed by arranging a three-dimensional gather forming sheet material 62 having an elastic member 61 so as to extend from outside to inside of both side edges of the top sheet 2. Each of the sheet members 62 has a portion located along the both side edges 41 of the absorber 4 and located outside the fixed end (not shown) of the three-dimensional gather 6 formed in the vicinity thereof in the width direction, or the top sheet 2 or the back sheet 3. A portion located inward in the width direction from the fixed end near the both ends in the longitudinal direction of the diaper is fixed on the back sheet 3. In three-dimensional gather 6,
A plurality of elastic members 61 are disposed substantially parallel to the free end 63.

In the disposable diaper 1 of the present embodiment, a waist elastic member 7 is arranged in the width direction at the waist opening edge D of the back side A on which the fastening tape 5 having the fastening portion 51 is provided. A plurality of waistline elastic members 8 are arranged in the waistline portion E of the back side portion A in the width direction. The back side where the fastening tape is provided means that the fastening tape of the two parts located on both sides of the crotch portion arranged on the crotch portion when worn is provided,
When worn, it has nothing to do with whether it is located on the dorsal side or the ventral side of the wearer.

The waist opening edge D is provided with the fastening tape 5 in the landing zone Z provided on the outer surface side of the abdomen B (the portion located on the opposite side of the crotch C from the back A). The diaper 1 according to the present embodiment is a portion that forms a peripheral portion of a waist opening formed when the diaper 1 is fixed.
In the above, the waist elastic members 7 for forming waist gathers are respectively provided at the waist opening edges D in the back part A and the abdominal part B in a stretched state in the width direction of the diaper. . The waist elastic members 7 in the illustrated disposable diaper are respectively
It has a band-like form with a width of about 5 to 30 mm, and is sandwiched and fixed between the back sheet 3 and the top sheet 2 or the sheet material 62 at the waist opening edge D.

As shown in FIG. 2, the waist portion E of the back side portion A is formed such that the disposable diaper is flattened by stretching the elastic members of the respective portions (tensed state). When the side is considered to be the upper side and the abdominal part B side is considered to be the lower side, it is located below the part D where the waist elastic member 7 is arranged and the crotch (the part arranged in the crotch of the wearer when worn) A portion where the left and right side edges are formed in a concave shape so as to follow the leg. The plurality of waist portion elastic members 8, 8 in the diaper 1 of the present embodiment are arranged at predetermined intervals substantially parallel to each other in the width direction of the diaper 1.

The waist elastic members 8 of the disposable diaper 1 are provided at least on both side edges 41 of the absorber 4.
The absorber 4 is fixed in a stretched state so as to exhibit elasticity and elasticity at a portion outward in the width direction from the position 41.
Are not arranged at least at the central portion of the portion in the width direction inside than the positions of both side edges 41, 41.

Each waist portion elastic member 8 in the present embodiment
Are arranged at both ends in the width direction of the back part A (both sides of the diaper 1), and are located more outward in the width direction than the positions of the side edges 41, 41 of the absorber 4 in each waist elastic member 8. The located portion is disposed in a stretched state and sandwiched and fixed between two flexible fixing sheets, and the two fixing sheets are a back sheet 3, a top sheet 2, or the sheet. It is adhesively fixed to the material 62. The inner end of the waist elastic member 8 on the inner side in the diaper width direction is located at a position slightly inward in the width direction from the position of the side edges 41 of the absorber 4, and from the center in the width direction of the absorber 4. The waist elastic member 8 is not disposed in a region extending to the vicinity of the left and right side edges 41, 41.

Width W of a portion where the waist elastic member 8 is not provided (a portion not exhibiting elastic elasticity) (see FIG. 2).
Is to improve the ease of wearing when the back part A is worn toward the back of the wearer and / or when worn toward the abdomen, and to prevent slipping and urine leakage of disposable diapers during wearing. From the viewpoint of prevention, it is preferably 1/2 to 1 of the width W1 of the absorber, and 1/10 to 4/5 of the total width W2 of the back part A.

On both sides of the disposable diaper 1 in the longitudinal direction, a pair of leg elastic members 9, 9 for forming leg gathers are disposed so as to be convexly curved inward in the diaper width direction. The leg gather formed substantially at the periphery of the leg opening formed at the time of wearing is substantially continuous over the entire periphery. Each of the leg elastic members 9 extends from both side edges of the back part A to the abdominal part B.
The crotch portion C is arranged in an arc along the both side edges of the crotch portion C. In the present embodiment, a plurality of leg elastic members are arranged substantially in parallel on both sides in the longitudinal direction.

In the disposable diaper of the present invention, FIG.
As shown in FIG. 5, a vertically long second fastening portion 52 is provided inside the both side edges A1 of the back side portion A on which the fastening tape 5 is provided, in the vicinity thereof along the both side edges A1, Ends 71, 81, 91 of the waist elastic member 7, the waist elastic member 8, and the leg elastic member 9 near both side edges A1 of the back side portion A are provided in the second fastening portion. 52 is located in the vicinity.

When the leg elastic members 9 are arranged in a curved manner as in the present embodiment, the ends 71, 81, 91 of the elastic members are respectively arranged in the second direction in the width direction of the diaper. It is preferably located in a region G having a width of 3 cm (width indicated by W5 in FIG. 3) from the portion A2 where the fastening portion 52 is provided, and particularly preferably in a region having a width of 2 cm. preferable. The distance L3 (see FIG. 3) between the end portion 91 of the leg elastic member 9 and the second fastening portion 52 (the distance in the longitudinal direction of the diaper) is preferably 3 cm or less.

When the leg elastic members 9 are arranged linearly along the longitudinal direction, the ends 71 and 81 of the waist elastic member and the waist elastic member are respectively
In the diaper width direction, it may be located in a region G having a width of 3 cm (width indicated by W5 in FIG. 3) from the portion A2 where the second fastening portion 52 is provided, particularly in a region having a width of 2 cm. Preferably, the end portion 91 of the leg elastic member 9 is located within a region having a width of 6 cm left and right from the portion A2. In this case, the distance L3 is 3
cm.

As shown in FIG. 3, the fastening tape 5 of the diaper 1 of the present embodiment is provided by joining and fixing a tape base 53 having a fastening portion 51 to both side edges of the back side portion A. The second fastening portion 52 is provided on a fixing portion 54 formed by fixing the tape base 53, and the waist elastic member 7 and the waist elastic member are provided on the fixing portion 54. Eight respective end portions 71, 81 are located. The tape base material 53 has a substantially T-shape, a portion of which protrudes outward from both side edges A1 and A1 of the back side portion A, and another portion includes a sheet forming both side edge portions. It is bonded and fixed between the materials. The portion to which the tape base material 53 is fixed is a fixing portion 54 having higher rigidity than other portions.

The length L of the second fastening portion 52 in the longitudinal direction of the diaper is the dispersion width Ld of the plurality of waist elastic members 8.
The second fastening portion 52 is disposed over the entire width of the dispersion width Ld. The length L of the second fastening portion 52 is preferably 5 to 10 cm, and the ratio (L / Ld) to the dispersion width Ld is preferably 5 to 1.
The width (width in the diaper width direction) W6 of the second fastening portion 52
Is preferably 0.5 to 3 cm, and the distance between the second fastening portion 52 and both side edges A1 of the back side portion A is 1.
It is preferably within 0 cm.

In the disposable diaper of the present invention, the stretching stress in the width direction of the waist portion E of the back side provided with the fastening tape is larger than the stretching stress in the width direction of the waist opening edge D of the back side. Is preferred. A viewpoint to improve ease of wearing when the back part A is worn toward the wearer's back side and / or when worn toward the abdomen, and prevents disposable diapers from slipping and urine leakage during wearing. From the viewpoint, the ratio (Q / P) of the stretching stress Q in the width direction of the waistline portion E to the stretching stress P in the width direction of the waist opening edge D (Q / P) is preferably 2 to 20, particularly 2 to 6. Further, from the same viewpoint, the elongation stress Q in the width direction of the waist portion E is 100 to 1000 cN, particularly 200 to 600 cN.
N, the elongation stress P in the width direction of the waist opening edge D is 50 to 400 cN, particularly 100 to 200 cN.
Preferably it is cN.

Here, the extensional stress in the width direction of the waist opening edge D of the back side portion A and the extensional stress in the width direction of the waist portion E of the back side portion A are measured as follows.

(Only correction of the figure number and addition of W4) <Elongation stress in the width direction of the waist opening edge> Measured using a Tensilon tensile tester (model number: RTA-100, manufactured by Orientec Co., Ltd.). . The initial chuck-to-chuck distance is set to a length obtained by subtracting 50 mm from the natural length in the width direction of the back part A (the length in a natural state where the elastic member is not extended), and the waist elasticity at the right and left side edges of the back part A is set. Portions located on both left and right sides (left and right sides in FIG. 2) of the part where the member is arranged (see FIG. 4, length L in the direction along the longitudinal direction of the diaper)
1 is 2.5 cm portion) D1 is sandwiched between chucks, and then the crosshead moving speed is 300 mm / min.
The sample is stretched in the width direction (horizontal direction in FIG. 2) by 90 mm or more under the condition of (1), and the load obtained by subtracting the load before stretching from the load at the time of stretching 90 mm is applied to the waist opening edge D of the back side portion A. The elongation stress in the width direction was used. When the length L1 is different from the width W4 of the waist elastic member (when a plurality of waist portions are arranged), the center line (diaper of the diaper) is provided. Center line extending in the width direction)
Is measured.

<Stretching stress in the width direction of the waist portion> Back side portion A
(See FIG. 4, the length L2 in the direction along the longitudinal direction of the diaper is 5. The measurement is performed in the same manner as in the measurement of the elongation stress at the waist opening edge D, except that the (0 cm portion) E1 is sandwiched between the chucks.

According to the disposable diaper of the present embodiment, since it has the above-described configuration, the second fastening portions 52 are provided respectively on the inside of both side edges of the back portion A, and the elastic member 7 is provided. , 8, and 9 respectively, said ends 71, 81, 91
However, since it is located in the vicinity of the second fastening portion 52, the back side A provided with the fastening tape can be easily directed to either the back side or the abdomen side of the wearer. In any case, the diaper is hardly slipped off or worn during wearing. Therefore, it can be easily worn not only in the state of lying on the back, but also in the state of lying on its face, standing up and facing this side, standing up and facing the other side, etc. Further, as shown in FIG. 5, it is easy to mount the device on a baby or the like who runs away with yes.

Since the ends 71, 81 of the waist elastic member 7 and the waist elastic member 8 are located on the fixing portion 54 formed by fixing the fastening tape 5, the back side portion A In the case where the user wears the device on either the back side or the abdomen side of the wearer, the "wasting" during wearing can be significantly suppressed. And while wearing,
It means that both sides of the waist opening edge and / or the back side are turned outward.

Further, according to the disposable diaper of the present embodiment, the waist elastic portion 8 disposed on the waist portion E is provided at a position outward in the width direction from the positions of the side edges 41, 41 of the absorber 4. The absorbent body is fixed in an extended state so as to exhibit elasticity and elasticity, and is not disposed at least at a central portion in a portion in the width direction inward from the positions of the side edges 41, 41 of the absorber. When the back side A provided with the fastening tape is fitted toward the back of the wearer (abdominal placement) and / or worn toward the abdomen, the body 4 is not fitted to the body 4 and the fit is improved. In this case, the user can wear the diaper more easily (backside wearing), and can further prevent the diaper from slipping off during wearing. In addition, since wrinkles are less likely to approach the absorber 4, it is possible to prevent the surface liquid flow of urine, and the effective width of the absorber 4 is maintained even during wearing, so that the absorption performance of the absorber can be sufficiently exhibited. it can. Therefore, it is also possible to reduce the amount of materials used and the manufacturing cost, make the diaper compact, etc. while maintaining the absorption performance. Further, since the absorber is not easily shirred, a clean appearance can be obtained even when the back side is attached to the back side or the abdomen side.

The pair of leg elastic members 9, 9
Are respectively disposed so as to be concavely curved outward in the width direction of the diaper, and leg gathers substantially continuous over the entire periphery of the periphery of the leg opening formed at the time of wearing are provided. Since the diaper is formed, it is possible to further prevent the diaper from slipping off during wearing, especially when the diaper is worn on the back side. Also, in either the standing position or the sleeping position, the gathers are along the feet, so that it is easy to wear.

The material for forming each part of the disposable diaper 1 of this embodiment will be described. Top sheet 2, back sheet 3, absorber 4, elastic member 61 for forming three-dimensional gathers
Various known materials conventionally used for disposable diapers can be used without particular limitation as a material for forming the sheet material 62, the landing tape for forming the landing zone R, and the like. The fastening portion 51 of the fastening tape 5 may be formed of a male member of a mechanical hook-and-loop fastener, or may be formed of an adhesive portion 51 formed by applying an adhesive. Further, the outer surface side of the back sheet 3 may be formed of a nonwoven fabric or the like, and a part of the nonwoven fabric or the like may be used as the landing zone R.

The second fastening portion 52 may be made of a male member of a mechanical hook-and-loop fastener, or may be made of an adhesive portion 51 formed by applying an adhesive. It is particularly preferable that both the first and second fastening portions 51 and 52 are made of a male member of a mechanical surface fastener. In addition, fastening tape 5
Various known materials used in conventional disposable diapers can be used as the material for forming the tape base.

As the waist elastic member 7, the waist elastic member 8 and the leg elastic member 9, various known elastic members can be used. For example, each elastic member may be in the form of a thread (thread). Rubber, etc.), a band-shaped material having a predetermined width (eg, flat rubber), a thin film-shaped material, and the like. Examples of the material for forming the elastic member include natural rubber, styrene-butadiene, butadiene, isoprene, neoprene, and the like. Synthetic rubber, EVA, elastic polyolefin, urethane and the like.

The waist elastic member 7 is preferably a belt having a predetermined width, the waist elastic member 8 is preferably a thread, and the leg elastic member 9 is preferably a flat rubber. Further, it is preferable that about 3 to 12 thread-shaped waist elastic members 8 are provided on each of the left and right sides of the back side A, for example.

Although a preferred embodiment of the present invention has been described above, 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 number of leg portion elastic members
It may be a book. In addition, the fastening part 51 and the second fastening part 5
It is preferable that they are separated from each other, but they may be integrally formed. In the latter case, a portion existing in a portion protruding from both side edges of the back side portion A is the fastening portion 51.
Further, the waist elastic member may be disposed between both side edges of the back side portion A in a state where elastic elasticity is developed. The disposable diaper of the present invention may be a disposable diaper for adults, but is suitable for disposable diapers for infants (baby), particularly infants who do not want to change diapers.

[0033]

EXAMPLES Example 1 A disposable diaper having the form shown in FIGS. 1 to 3 was manufactured. In addition, the waist part E of the back part A is 5
Nine thread-like elastic members of 0 mm were arranged, and a belt-like urethane elastic member having a width (W4) of 20 mm was arranged at the waist opening edge D. The leg acidic member was disposed in a curved state.
The second fastening portion 52 has a width of 1 cm and a length of 6 cm, and ends 71 and 8 of the waist elastic member and the waist elastic member.
The distance between the first fastening portion 52 and the portion A2 where the second fastening portion 52 is provided is 0 mm, and the end portion 91 of the leg elastic member 9 and the portion A
2 was 8 mm. Longitudinal distance L3 between end portion 91 of leg elastic member 9 and second fastening portion 52
Was within 3 cm. This disposable diaper has a back A
The elongation stress in the width direction of the waist opening edge D is 150 cN.
And the extension stress in the width direction of the waist portion E was 300 cN.

<Comparative Example 1> The second fastening portion 52 is not provided, the leg elastic members on both sides in the longitudinal direction of the diaper are linearly arranged, and the leg elastic members are not provided directly below the waist elastic member. A disposable diaper was manufactured in the same manner as in Example 1 except that nine waist elastic members were continuously arranged on E.
In this disposable diaper, the extension stress in the width direction of the waist opening edge portion D of the back portion A was 150 cN, and the extension stress in the width direction of the waist portion E was 400 cN.

Comparative Example 2 A flaky urethane elastic member (5 cm × 5 cm) was used in place of the waist elastic member in Example 1.
Example 1 except that the second fastening portion 52 was not provided in the left and right sides of the back side portion A in a non-extended state, and the second fastening portion 52 was not provided.
A disposable diaper was manufactured in the same manner as described above. In this disposable diaper, the elongation stress in the width direction of the waist opening edge portion D and the waist portion E of the back side portion A was 100 cN and 0 cN, respectively. The waist portion E did not extend 90 mm because the urethane elastic member was disposed in a non-extended state. The leg portion elastic member was arranged to be slightly curved.

<Comparative Example 3> A disposable diaper was obtained in the same manner as in Example 1 except that the waist elastic member was not provided and the second fastening portion 52 was not provided. In this disposable diaper, the elongation stress in the width direction of the waist opening edge portion D and the waist portion E of the back portion A is 150 cN in order,
It was 0 cN.

<Comparative Example 4> A disposable diaper was obtained in the same manner as in Example 1 except that the second fastening portion 52 was not provided.

<Evaluation of Slipping> Each of the disposable diapers of Examples and Comparative Examples was used as an infant waist model (a walking motion in which both legs were moved back and forth in an upright position, and an artificial urine injection from the crotch portion was possible. (A model imitating the waist of an infant), and was allowed to walk for 5 minutes at a walking speed of 150 steps / minute (standing position). Thereafter, the walking movement was stopped, and 40 g of artificial urine was injected into the diaper at a rate of 5 g / min through a tube. Thereafter, similarly, the walking exercise for 5 minutes and the injection of artificial urine of 40 g were alternately repeated, and the walking exercise for a total of 25 minutes and the injection of artificial urine of 160 g in total were performed.

These series of operations are performed for each disposable diaper when the fastening tape is attached to the landing zone on the ventral side of the model (abdominal attachment), and when the fastening tape is landed on the back side of the model. The measurement was carried out for both the case where the subject was attached to the zone and the case where the subject was attached to the subject (backside attachment). In each case, the amount of slipping of the diaper was measured every time the five-minute walking exercise was completed. Table 1 shows the results. In the examples, no diapers were generated.

[0040]

[Table 1]

<Evaluation of leak resistance (measurement of leak value before dynamic)
> Each disposable diaper of the example and the comparative example was attached to the above-described infant waist model, and was allowed to walk for 5 minutes at a walking speed of 150 steps / minute (standing). Then, stop walking,
Via a tube, 80 g of artificial urine was injected into the diaper at a rate of 5 g / min. Thereafter, after a walking exercise was performed for 5 minutes, the amount of slipping of the diaper was measured, and then a pre-morte evaluation was performed. In other words, the model is prone while being slipped, and 40 g of artificial urine is injected at a speed of 5 g / min.
At the time when the injection of g was completed, it was visually checked for any leakage. If no leak occurred, an additional 40 g of artificial urine was injected, and such an operation was repeated until a leak occurred.

These series of operations were performed for the disposable diapers of Example 1 and Comparative Example 4 for both abdominal wearing and dorsal wearing, and for the disposable diapers of Comparative Examples 1 to 3, the abdominal fitting was performed. The test was performed only in the case of wearing (normal use mode). The total injection amount of artificial urine at the time when the leakage of urine was observed was defined as a dynamic pre-leakage value, and the measurement results are shown in Table 2.

[0043]

[Table 2]

From the results shown in Tables 1 and 2, the disposable diaper of the present invention can be used regardless of whether the back side provided with the fastening tape is attached to the back side or the abdomen side. It can be seen that urine leakage hardly occurs when the diaper slips down.

[0045]

According to the disposable diaper of the present invention, the back side on which the fastening tape is provided can be easily worn even if the back side is directed to either the back side or the abdomen side of the wearer. In any case, it slips down while wearing,
Urine leakage is unlikely to occur.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disposable diaper as one embodiment of the present invention.

FIG. 2 is a plan view (partially cutaway view) showing the disposable diaper of FIG. 1 in a state (tensile state) in which the elastic members of the respective parts are stretched and expanded in a plane.

FIG. 3 is an enlarged plan view showing a part (one side part of a back side) of FIG. 2 in an enlarged manner.

FIG. 4 is an explanatory diagram for explaining a method of measuring the elongation stress in the width direction of the waist opening edge portion on the back side and the waist portion.

5 is a perspective view showing a state in which the disposable diaper of FIG. 1 is attached to the back side provided with the fastening tape toward the abdomen (rear side attachment).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Fastening tape 51 Fastening part 52 Second fastening part 6 Three-dimensional gather 7 Waist elastic member 71 End part near both sides of back side part 8 Waist elastic part 81 Ends near both sides of back side 9 Leg elastic member 91 Ends near both sides of back side A Back side B Abdominal side C Inseam

Claims (5)

[Claims] 1. A back side provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the two sheets, and provided with a fastening tape having a fastening portion. A waist elastic member is disposed in the waist opening edge portion in the width direction, and a plurality of waist elastic members are disposed in the back side at the waist portion in the width direction. In a substantially vertically disposable diaper in which a pair of leg elastic members are disposed on both sides in the direction, a second fastening portion is provided on each of inner sides of the back side, The waist portion elastic member, the waist portion elastic member, and the leg portion elastic member have respective end portions near both side edges of the back side portion located near the second fastening portion. And disposable diapers. 2. The fastening tape according to claim 1, wherein each of the side edges of the back side portion is provided with a tape base having the fastening portion bonded and fixed thereto, and the second fastening portion includes:
2. The fixing device according to claim 1, wherein the end portion of the waist elastic member and the waist elastic member are located on a fixing portion formed by fixing the tape base material. 3. Disposable diapers. 3. The pair of leg elastic members are disposed so as to be convexly curved inward in the width direction of the diaper, and are provided on the peripheral edge of the leg opening formed at the time of wearing. The disposable diaper according to claim 1, wherein a substantially continuous leg gather is formed over the entire circumference. 4. The end of each of the waist elastic member, the waist elastic member, and the leg elastic member has a width 3 to the right and left from a portion where the second fastening portion is provided.
The disposable diaper according to claim 3, wherein the diaper is located within an area of about 0.1 cm. 5. The waist elastic member is fixed in an extended state at least at a portion outward in a width direction from positions of both side edges of the absorber so as to exhibit elastic elasticity and the absorber. It is not disposed at least at the central portion of the portion in the width direction than the position of both side edges of the
4. The disposable diaper according to any one of 4.