JP2000300604A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article, such as a throw-away diaper, which is excellent in the erecting property of three-dimensional guards and is excellent in fitness, air permeability and leakage preventiveness. SOLUTION: This throw-away diaper has a liquid permeable front surface sheet, a liquid-impermeable leakproof sheet 3 and a liquid holdable absorber, is substantially longitudinally long and includes a pair of the three-dimensional guards having three-dimensional guard elastic members 64 and 64' in both right and left side parts of a longitudinal direction. The three-dimensional guard elastic members 64 and 64' are so disposed that the intermediate portions 64b and 64b' in their longitudinal direction exist on the rear surface side of the absorber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a disposable diaper excellent in leak prevention.

[0002]

2. Description of the Related Art In absorbent articles such as disposable diapers, it is important to effectively prevent leakage. Therefore, three-dimensional guards are formed on both the left and right sides of the absorber. Various types have been proposed (Japanese Patent Publication No. 6-93901, etc.). Such a three-dimensional guard fits the wearer with its free edge rising upward, forms a pocket between the three-dimensional guard and the topsheet, and temporarily stores excrement in the pocket. It is intended to prevent excrement from flowing on the surface of the topsheet to cause leakage. However, the three-dimensional guard in the conventional absorbent article may not sufficiently exhibit its uprightness, may not have sufficient fit, and may not have a pocket large enough to prevent leakage. .

[0003] Accordingly, an object of the present invention is to provide an absorbent article such as a disposable diaper, which is excellent in standing up of a three-dimensional guard, and excellent in fitting property, air permeability and leakage prevention property.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a liquid-permeable topsheet, a liquid-impermeable leakproof sheet, and a liquid-retentive absorber, and is substantially vertically elongated, and is provided on both left and right sides in the longitudinal direction. In an absorbent article comprising a pair of three-dimensional guards having a three-dimensional guard elastic member in the part, the three-dimensional guard elastic member is
The above object has been achieved by providing an absorbent article in which a longitudinal intermediate portion is located on the back side of the absorber.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the absorbent article of the present invention will be described. As shown in FIGS. 1 to 4, a disposable diaper 1 as an absorbent article according to the first embodiment has a liquid-permeable top sheet 2, a liquid-impermeable leak-proof sheet 3, and a liquid-retentive absorber. And a substantially three-dimensional guard elastic member 6 on both left and right sides in the longitudinal direction.
It has a pair of three-dimensional guards 6, 6 'with 4, 64'.

In the disposable diaper 1 of the present embodiment, the absorbent body 4 is sandwiched and fixed between the topsheet 2 and the leak-proof sheet 3. The absorber 4 may have various shapes such as an hourglass shape, a trapezoidal shape, and a rectangular shape. In the present embodiment, the absorber 4 has a rectangular shape. In addition, waist elastic members 81 are respectively arranged in the waist openings 8 in the abdominal part A located on the abdomen of the wearer and the back part B located on the dorsal side of the wearer to form waist gathers. ing. A fastening tape 11 for disposable diaper fastening is provided on each of the left and right side edges B1 and B2 of the back side B. The three-dimensional guards 6 and 6 ′ are formed by arranging strip-shaped sheet members 61 for forming a three-dimensional guard so as to extend outward from both left and right edges of the absorber 4. The free edge 63 is parallel to the longitudinal direction of the disposable diaper 1. The sheet material 61 is fixed to the topsheet 2 above the side portion of the absorber 4, and a base end 60 is formed by the fixed portion. Sheet material 61
The longitudinal edges 61a are fixed to the topsheet 2 and the side flap forming material 5 described later on the waist opening 8 side, respectively.

On the surface of the leak-proof sheet 3, side flap forming members 5 are arranged so that both side portions extend outward in the width direction of the disposable diaper from both right and left side edges of the absorber 4. The sheet material 61 and the side flap forming material 5 are stacked outward in the width direction from the left and right side edges of the absorber 4, and a pair of left and right side flap portions 7 abutting around the wearer's legs when worn. Is formed. in this way,
By forming the side flap portion 7 with the side flap forming material 5 and the sheet material 61, a disposable diaper having excellent air permeability and no stuffiness can be obtained. The side flap forming material 5 has an hourglass shape whose center in the longitudinal direction is constricted, and the shape of the side edge located at the edge of the side flap portion 7 of the sheet material 61 is the same as that of the side flap forming material 5. ing.

The three-dimensional guard elastic members 64, 64 '
Are arranged such that their intermediate portions 64b, 64b 'in the longitudinal direction are located on the back side of the absorber 4.

More specifically, the three-dimensional guard elastic member 6
4 and 64 ', the front portions 64a and 64a' and the rear portions 64c and 64c '(indicated by dashed lines in FIG. 2) are disposed on the three-dimensional guards 6 and 6', respectively. , 6 ′ are not parallel to the free edges 63, 63. However, near or at the ends of the front part and the rear part, a part of the three-dimensional guard elastic members 64 and 64 ′ is in a state parallel or nearly parallel to the free edge 63 to the extent that the effect of the invention is not impaired. You may. Here, the “intermediate portion” means a portion substantially located at an intermediate portion between the abdominal portion and the back side of the absorbent article (a crotch portion substantially positioned at the crotch of the wearer when worn). The “front portion” and “rear portion” mean portions located substantially on the ventral side and the back side.

The three-dimensional guard elastic members 64, 64 'are adhered to the sheet material 61 via an adhesive so as to be inclined with respect to the free edge 63 in the three-dimensional guard 6, and are disposed at an intermediate portion 64b. , 64 b ′ are disposed on the surface of the leak-proof sheet 3 on the side edge side of the absorber 4. Specifically, the three-dimensional guard elastic members 64 and 64 ′ are such that the ends of the front portions 64 a and 64 a ′ and the rear portions 64 c and 64 c ′ are located near the free edge 63, and the end of the disposable diaper 1. The three-dimensional guards 6, 6 ′ are arranged and fixed from the free edge 63 to the base end 60 toward the center in the longitudinal direction from the portion. Also, the intermediate portions 64b, 64
The b ′ is arranged so as to be sandwiched and fixed by the leakage prevention sheet 3 and the side flap forming material 5 on the back surface side of the absorber 4. The pair of three-dimensional guard elastic members 64 and 64 ′
The disposable diaper 1 is disposed across the width direction of the disposable diaper 1 on the back surface side of the absorber 4 so as to form an X shape on the back surface side of the absorber 4. As a result, the pair of three-dimensional guard elastic members 64 and 64 ′ cross each other at the center in the width direction and the center in the length direction of the diaper, and the front part 64a of one of the three-dimensional guard elastic members 64 is
A rear portion 64c located on one of the three-dimensional guards 6 '
Is located on the other three-dimensional guard 6, the front part 64a 'of the other three-dimensional guard elastic member 64' is located on the other three-dimensional guard 6, and the rear part 64c 'is located on the one three-dimensional guard 6'. positioned. In the present embodiment, each of the three-dimensional guard elastic members 64, 64 'has a string-like shape.

The “front portion” and “rear portion” of the three-dimensional guard elastic members 64 and 64 ′ are regions arranged on the three-dimensional guard in the three-dimensional guard elastic members 64 and 64 ′, and are mainly used for disposable diapers. It is a part located on the abdominal part and the dorsal part. Also, the "middle part"
This is a region sandwiched between the front portion and the rear portion, including a region where the three-dimensional guard elastic members 64 and 64 'are arranged at the lower part of the absorber, and mainly located at the crotch part of the disposable diaper.

In the three-dimensional guard 6, the length L1 of the portion where the front portions 64a, 64'a and the rear portions 64c, 64c 'of the three-dimensional guard elastic members 64, 64' are disposed is:
From the standpoint of raising the three-dimensional guard upward and preventing leakage,
It is preferably set to 30 cm, more preferably 5 to 20 cm. The length L2 of the diaper in which the intermediate portions 64b and 64b 'are located is preferably 3 to 30 cm from the viewpoint of the fit of the diaper to the wearer.
More preferably, it is 20 cm. In addition, a plurality of three-dimensional guard elastic members 64 and 64 ′ may be arranged in a number of 2 to 20, and the distance between the three-dimensional guard elastic members is 0.2 to 5
cm, and the intervals between the elastic members may not be equal. By arranging a plurality of them, the effects of three-dimensional standing and fitting can be further exhibited.

The free edge 63 is provided with a string-like elastic member 65 along the free edge 63. Also, an elastic member 65 'is disposed between the base end and the free edge substantially in parallel along the free edge, as in a second embodiment described later, so that one elastic member 65' is provided. The part and the three-dimensional guard elastic member 64 can also intersect on the three-dimensional guard 6.
At this time, a total of 2 to 20 elastic members 65, 65 'can be arranged, and in this case, each elastic member 65, 65'
The interval of 65 'is preferably 0.2 to 5 cm, and the intervals between the elastic members may not be equal. In addition, after at least one of the three-dimensional guard elastic members 64 and 65 has the above-described configuration in the front part and the rear part, the side edge of the absorber is further cut from the base end of the three-dimensional guard. Or extended to the side flap portion, or arranged on the back side of the absorber, more preferably arranged and fixed so that the edge of the three-dimensional guard elastic member is located near the side edge of the absorber on the opposite side, As in the case of a single form, the sheet may be wound around the back side of the absorbent body and then arranged and fixed such that the edge is located on the opposite side flap portion. As described above, in the case of (3), the elastic member is interlocked with the tape fastener at the time of mounting, and the standing and fit of the three-dimensional guard are further improved. Also,
In the case of (1), the fit (waist, waist portion) can be further improved. In the case of, both of these are performed. In the case of and, it is preferable that the edge is arranged to the vicinity of the tape fastener in the case of the unfolded diaper and to the vicinity of the side edge of the pants-type diaper. Note that the “front portion” and “rear portion” here include the longitudinal end of the three-dimensional guard.

Next, a description will be given of a material for forming each member constituting the disposable diaper of the present embodiment. As a material for forming the topsheet 2, the leak-proof sheet 3, the absorber 4, the waist elastic member 81, and the fastening tape 11, those usually used for disposable diapers can be used without any particular limitation.

The sheet material 61 and the side flap forming material 5 are preferably air-permeable sheets, and the air permeability thereof is preferably 500 sec / 100 cc or less, and 1
It is more preferably not more than 00 sec / 100 cc,
More preferably, it is 20 sec / 100 cc or less.
By setting the air permeability to 500 sec / 100 cc or less, the ventilation effect is good, the inside of the diaper is not stuffy when worn, and adverse effects such as rash on the wearer's skin are reduced. The water pressure resistance (water repellency) of the sheet material 61 and the side flap forming material is 3.0 g / cm ^2.
Or more, more preferably 5.0 g / cm ² or more. By setting the water resistance pressure to 3.0 g / cm ² or more,
Exudates are less exuded, and the leakage prevention effect is enhanced.
The strength (breaking strength) in the CD direction of the sheet material 61 and the side flap forming material 5 is 1000 cN / 50 m.
m, more preferably 1200 cN / 50 mm or more. Strength of 1000 cN / 50
When the thickness is not less than mm, it is possible to reduce the possibility that the material is broken at or around a portion where the force is applied to the sheet material at the time of mounting and the fit of the diaper is reduced. The forming materials of the sheet material 61 and the side flap forming material 5 satisfying such conditions include spunbond, thermal bond, spunbond-meltblown nonwoven fabric (SM), spunbond-meltblown-spunbond nonwoven fabric (SMS), and spunbond. Bond-melt blown-melt blown-spunbond nonwoven fabric (SMMS), heat roll, air through, meltblown, spunlace nonwoven fabric, and the like.

The sheet material 61 and the side flap forming material 5 may have elasticity. In this case, the forming material may be a liquid-permeable or liquid-impermeable elastic sheet, an elastic net, or a composite. From the viewpoint of a feeling of wearing, various kinds of non-woven fabrics (including elastic and non-elastic ones) or various non-woven fabrics (including elastic and non-elastic ones) can be used from the viewpoint of wearing feeling. It is preferable to use an elastic panel material composited with a thermoplastic elastomer film and a net). When an elastic material is used for the sheet material 61 and the side flap forming material 5, the direction of the expansion and contraction is not particularly limited. Those having elasticity in the directions and those having elasticity in both directions are preferable.

The air permeability and the water resistance are measured as follows. [Air permeability] It was measured according to JIS-P8117. That is, the sheet was cut into a size of 70 × 70 mm, and the time required for 100 ml of air to pass therethrough was measured using an air permeability measuring device (Oken type air permeability measuring device). [Water pressure resistance] Measured according to JIS-L1092. Breaking strength: A test piece having a width of 25 mm in the flow direction (MD) of the raw material and a length of 150 mm in a direction (CD) perpendicular to the flow direction was cut out. This test piece was subjected to a tensile test using a Tensilon tensile tester [manufactured by Orientec Co., Ltd.] at a chuck distance of 50 mm and a tensile speed in the CD direction of 300 mm / min to measure the strength at break.

The leak-proof sheet 3 may be any one usually used for disposable diapers without any particular limitation, but may have elasticity. As a material for forming the liquid impermeable film sheet and the nonwoven fabric satisfying such conditions, a polyolefin-based material (polyethylene,
Sheets obtained by subjecting polymer resin sheets such as polypropylene) or polyester to heat treatment, embossing, opening or slitting, etc .; sheets obtained; polyolefin (polyethylene, metallocene polyethylene, etc.), polyurethane, polyester System, polyether system, polystyrene system, styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-butylene-
Styrene copolymer (SEBS), styrene-ethylene-
Thermoplastic elastomer sheet such as propylene-styrene copolymer (SEPS), spun bond using thermoplastic elastomer and elastic material, thermal bond, SM, SM
S, SMMS, heat roll, air through, melt blown, spun lace nonwoven fabric and the like. Also, among these forming materials, the moisture permeability is 0.5 g / [100
cm ² · hr] or more, more preferably 5.0 g / cm ² or more, and preferably 50 g / c 2
m ² or more is more preferable. The water vapor transmission rate is determined by JI
It measured according to S-Z0208.

As the three-dimensional guard elastic members 64 and 64 'and the elastic member 65, conventionally known elastic members can be used without limitation. The stress of the three-dimensional guard elastic members 64 and 64' is set to 10 gf to 1000 gf. It is preferable that the stress of the elastic member 65 be 10 gf to 1000 gf. Here, the stress can be measured by the following measuring method. [Method of measuring stress of elastic member] The length of the elastic member is 150 m.
m, and a tensile test was performed using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.) at a chuck distance of 100 mm and a tensile speed of 300 mm / min to measure the stress at 100% elongation. When the stress of the elastic member 65 disposed on the free edge 63 and the stress of the three-dimensional guard elastic members 64 and 64 ′ are made different, different materials may be used, or the same material may be used to change the elongation ratio or the like. Is also good.

The disposable diaper according to the present embodiment can be used in the same manner as a normal deployable disposable diaper.
And in the disposable diaper of this embodiment, since the three-dimensional guard elastic members 64 and 64 'are provided as described above, the three-dimensional guard 6 is well-standing and the space between the pair of three-dimensional guards 6 is appropriately widened. In addition, the absorbent surface can be reliably arranged along the urinary part of the wearer, and the excrement can be immediately absorbed to prevent the excrement from flowing in the disposable diaper. For this reason, it is excellent in leak prevention.

The disposable diaper according to the present embodiment comprises an absorbent body 4
Is covered with the leakage prevention sheet 3 and the top sheet 2, and then the side flap forming material 5 and the sheet material 61 are arranged while the three-dimensional guard elastic members 64 and 64 'are arranged in a predetermined shape.

Next, another embodiment of the present invention will be described. In the following description, points different from the above-described first embodiment will be particularly described. For the points that are not particularly described, the description in the above-described first embodiment is appropriately applied. In the disposable diaper 1 of the second embodiment shown in FIG. 5, the three-dimensional guard elastic member 64 is curved without crossing on the back side of the absorber 4, and each of the three-dimensional guard elastic members 64 The front portion 64a and the rear portion 64c of the one three-dimensional guard elastic member are respectively located on the same three-dimensional guard. Also, the elastic members 65, 65 'arranged along the free edge.
Are provided at the free edge 63 and at a substantially intermediate portion between the free edge 63 and the base end 60, and the elastic member 65 ′ and the three-dimensional guard elastic member 64 provided at the intermediate portion are connected to the three-dimensional guard 6. Crossed above. Here, the elastic members 65,
65 'is described by exemplifying a case in which two pieces are arranged one by one, but the number of these pieces is 2 to 20 in total.
And each elastic member 6 in this case.
The interval between 5, 65 'is preferably 0.2 to 5 cm, and the intervals between the elastic members may not be equal. As described above, the arrangement of the three-dimensional guard elastic member on the back surface side of the absorber 4 is arbitrary, but from the viewpoint of fit when worn,
It is preferable that the distance T between the three-dimensional guard elastic members when they are arranged without intersecting is set to be 20 cm or less, more preferably 15 cm or less, still more preferably 10 cm or less.

The present invention is not limited to the above-described embodiment, but can be variously modified as follows, for example. In the description of the above-described embodiment, the deployment type disposable diaper has been described as an example. However, the present invention is not limited thereto, and is applied to a pants type disposable diaper, and further to an incontinence pad, a sanitary napkin, and the like. it can. In the case of a pants-type disposable diaper, the above-mentioned “substantially vertically long” means that the pants-type disposable diaper becomes vertically elongated when the joint portion is peeled off and put into a deployed state. Further, in the above-described embodiment, an example in which the gathers are not formed in the side flap portions 7 has been described. However, the present invention is not limited thereto, and may have a form having gathers. In addition, although the base end 60 of the three-dimensional guard 6 is illustrated on the absorber 4, the base end 60 may be located on the side flap portion 7. Also, a pair of leg gathers may be formed by separately disposing an elastic member on the side flap portion 7.

A three-dimensional guard may be provided at the waist portion, and a part that comes into contact with the excretory part may be surrounded by a three-dimensional guard to further improve leakage prevention. The three-dimensional guard provided at the waist may be formed by arranging the three-dimensional guard elastic member 64 as in the first and second embodiments. The end of the three-dimensional guard elastic member may be provided with a portion toward the free edge and a portion toward the base end alternately toward the center in the longitudinal direction. In addition, the absorbent body is divided in the longitudinal direction and / or the width direction of the disposable diaper,
You may make a cut. Specifically, the absorber is formed by arranging three elongated rectangular absorbers in parallel, or by making cuts on both sides and both end sides to stabilize the formation state of the opening 12 and shift the absorber. Falling may be prevented.

Further, a part of the intermediate portion of the three-dimensional guard may be joined to the upper side portion or the side flap portion of the absorber. Further, a liquid impermeable film may be laminated on a part between the base end and the free end of the three-dimensional guard. In this case, the exudation of the excrement from the three-dimensional guard can be more effectively prevented, and the leakage prevention effect is improved. Further, a configuration may be employed in which a lower part and side parts of the absorber are covered by using a water-repellent backing paper, a nonwoven fabric, and a liquid impermeable film as a material constituting the absorber. In this case, it is effective to prevent excreta once absorbed by the body pressure of the wearer from seeping out from the absorber. Also, on the back side located on the back of the wearer,
A back-side elastic part formed by arranging a plurality of back-side elastic members along the width direction of the absorbent article may be provided. In this case, the fit on the back side of the diaper can be further improved.

In the first and second embodiments, the sheet material 61 for forming the three-dimensional guard may be disposed so as to cover the back surface of the absorber 4. That is, the sheet material 61 may be disposed so as to be located between the back sheet 3 and the absorber 4 or between the back sheet 3 and the side flap forming material 5. Part 7
Is formed only by the side flap forming material 5. By taking such a form, the leakage prevention effect (sheet material having water pressure resistance) of the sheet material 61 can be imparted to the absorber back surface side (outside the diaper). Further, since the side flap portion is formed only of the side flap forming material 5 and does not need to be bonded to the sheet material 61, the air permeability is improved.

[0027]

As described above, the absorbent article of the present invention is excellent in the uprightness of the three-dimensional guard, and is excellent in the fitting property and the leak preventing property.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disposable diaper as a first embodiment of the present invention as viewed from a leakproof sheet side in a natural state.

FIG. 2 is a plan view showing a top sheet side in a state where an elastic member of the disposable diaper shown in FIG. 1 is extended.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken along line YY of FIG. 2;

FIG. 5 is a plan view (corresponding to FIG. 2) of a disposable diaper as another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 10 Main body 11 Fastening tape 2 Top sheet 3 Leak-proof sheet 4 Absorber 5 Side flap forming material 6 Solid guard 60 Base end 61 Sheet material 63 Free edge 64, 64 'Solid guard elastic member 64a End 64b Central part , 65 elastic member 7 side flap portion 8 waist opening 81 waist elastic member A belly side B back side

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hisashi Watanabe 2606 Kabane-cho, Akaga-cho, Haga-gun, Tochigi Pref. Inside the Kao Co., Ltd. (72) Inventor Takao Koyama 2606, Kaiga-cho, Akabane-cho, Haga-gun, Tochigi pref. F term (reference) 3B029 BD12 BD13 4C003 CA01 DA04 DA08 EA00 EA03 HA05 4C098 AA09 CC10 CC15 CC27 CE05 CE06

Claims (3)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable leak-proof sheet, and a liquid-retentive absorber, are substantially vertically elongated, and have a three-dimensional guard elastic member on both left and right sides in the longitudinal direction. In an absorbent article having a pair of three-dimensional guards,
An absorbent article in which the three-dimensional guard elastic member is disposed such that a middle portion in the longitudinal direction is located on the back side of the absorber. 2. A front part and a rear part of the three-dimensional guard elastic member are at least partially disposed on the three-dimensional guard, respectively, and are arranged so as not to be parallel to a free edge of the three-dimensional guard. Item 2. The absorbent article according to Item 1. 3. The three-dimensional guard elastic member is such that ends of a front portion and a rear portion thereof are located on the free edge side, and the front portion and the rear portion are directed toward the longitudinal center of the absorbent article. The three-dimensional guard is arranged and fixed from the free edge to the base end, the middle part is fixed to the back side of the absorber, and the sheet material for forming the three-dimensional guard is arranged to cover the back side of the absorber. The absorbent article according to claim 1, wherein the absorbent article is made.