JP2003102779A - Pants-type disposable diapers - Google Patents

Abstract

(57) [Summary] [Problem] Change diapers after stool can be sanitary, and
It is easy to wear and has a good feeling of wearing, excellent in absorption performance and leakproof performance,
In addition, to provide good-looking pants-type disposable diapers. A leg elastic region is formed along a periphery of a leg opening, including an elastic member extending from an abdominal portion to a crotch portion, and an elastic member extending from a back portion to a crotch portion. , The two elastic members 71, 72 are formed in the gather forming portion 71.
a, 72a and the extension portions 71b, 72b, and has an end on the side of the diaper, and the abdomen side edge of the extension portion located closest to the abdomen, Pants-type disposables in which the maximum distance W3 between the extension portion located on the side of the outer side and the back side edge is smaller than the sum (W1 + W2) of the maximum arrangement widths of the elastic members 71 and 72 in the gather forming portion. Diapers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type disposable diaper which can be changed hygienically after stool hygiene, is easy to put on, has a good wearing feeling, is excellent in absorption performance and leakage prevention performance, and has a good appearance. Regarding

[0002]

2. Description of the Related Art Pants-type disposable diapers are widely used for high-age children and adult incontinent persons. Since such a pants-type diaper can be worn in the same manner as underwear pants, it has been devised to bring the feeling of wearing closer to that of underwear, while the basic performance of the diaper (absorption, leakproofness, etc.) ) Must be provided. This is also the reason why commercially available pants-type diapers are provided with elastic members in the waist openings and leg openings so as to form gathers. In particular, the leg elastic member is important for leakproofness because it is close to the urinary part and the defecation part.

The leg elastic members in a general pants-type diaper are arranged along the leg openings. From the viewpoint of manufacturing, the disposition of the leg elastic members is
One in which an elastic member is arranged from the abdominal part of the diaper to the back part via the crotch part, and another elastic member from the abdominal part and the back part to the crotch part along one leg opening. Arrange
It is common that the diaper is traversed to the opposite side in the width direction and is arranged along the other leg opening up to the ventral side and the back side, respectively. The latter technology is easy and efficient to manufacture, but the manufactured disposable diaper has the advantage that it has an excellent inseam fit because the crotch is pulled up to the abdomen and the back by wearing. If the rigidity of the absorbent body is high, the absorbent material in the crotch part may contract and deteriorate the absorption efficiency.In addition, the rigidity of the elastic member makes it easier to bend convexly from that part to the body side, preventing leakage when worn. It may be difficult to form a pocket shape that is useful for health, and after use, it may be difficult to easily and hygienically perform post-stool treatment. In addition, when the crotch region has elastic elasticity, the absorber in the relevant part may shrink in the width direction, which makes it difficult to effectively utilize the absorber.

Therefore, an object of the present invention is to make it possible to change the diaper after stool hygienically, and to wear it easily and to wear it well.
It is to provide a pants-type disposable diaper that has excellent absorption and leak-proof properties and that looks good.

[0005]

According to the present invention, there is provided a liquid-permeable top sheet, a liquid-impermeable back sheet and a liquid-retaining absorber, and a waist opening and a pair of leg openings are formed. In the pants-type disposable diaper, a leg elastic region is formed along the periphery of the leg opening, and the leg elastic region includes a plurality of leg elastic regions arranged from the abdominal side to the crotch region. A first elastic member and a plurality of second elastic members arranged from the back side portion to the crotch portion are provided, and the first and second elastic members are formed on the periphery of the leg opening. The gather forming portion and the extending portion extending from the gather forming portion toward the center of the diaper width direction are arranged along the gather forming portion and have an end portion at a position that does not reach the center of the diaper width direction. Length of diaper in unfolded and stretched condition The maximum distance between the ventral side edge of the extension located on the most ventral side of the direction and the dorsal side edge of the extension located on the most dorsal side, By providing a pants-type disposable diaper characterized by being smaller than the total of the maximum disposition widths of the plurality of first and second elastic members in the gather forming portion in the longitudinal direction of the diaper, the above object is achieved. It has been achieved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on its preferred embodiments. The pants-type disposable diaper 1 according to the first embodiment of the present invention is, as shown in FIGS. 1 to 3, interposed between a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3 and both sheets. A liquid-retaining absorber 4, and both side edges of the ventral side A and the back side B are joined together to form a waist opening D and a pair of leg openings E, E. This is a pants-type disposable diaper.

In the disposable diaper 1 of this embodiment,
The absorber 4 has an hourglass shape with a central portion constricted, and the topsheet 2 and the backsheet 3 have substantially the same shape according to the outline of the absorber 4. Further, the topsheet 2 and the backsheet 3 are joined to each other outside both side edges of the absorber 4 in the longitudinal direction, and are joined to each other at a portion extending from the longitudinal edge of the absorber 4.

Two outer layer non-woven fabrics 51 and 52 are arranged on the outer side of the back sheet 3 (outer surface side of the diaper), and the outer layer non-woven fabrics are more than the both end edges and both side edges of the absorbent body 4 in the longitudinal direction. The outer peripheral nonwoven fabric that extends toward the outside of the disposable diaper forms the peripheral edge of the waist opening D and the peripheral edges of the leg openings E, E. Then, the waist elastic member 6, the leg elastic members 71 and 72, and the waist elastic member 9 are arranged between the two outer layer non-woven fabrics 51 and 52 at a predetermined portion to form a waist elastic region (waist gather).
60, an annular leg elastic region (leg gather) 70, and a waist elastic region (girth gather) 90 are formed. The topsheet 2, the backsheet 3, and the absorber 4 are integrated to form an absorbent main body 10. The absorbent main body 10 is bonded to the outer layer body 5 composed of two outer layer nonwoven fabrics 51 and 52. It is fixed. Further, three-dimensional gathers 8 are formed along both side edges of the absorber 4.

Thus, the disposable diaper 1 of the first embodiment
In, the leg elastic regions (leg gathers) 70 are formed in an annular shape closed along the peripheral edge of the leg opening E, and more specifically, a plurality of leg elastic regions 70 are arranged from the ventral side A to the crotch C. First elastic member 71 and the back side portion B to the crotch portion C
And a plurality of second elastic members 72 arranged over the entire length. In addition, the first and second elastic members 71, 7
2 is gather forming portions 71a and 72a arranged along the periphery of the leg openings, and gather forming portions 71a and 72a.
end portion 71 at a position that does not reach the center of the diaper in the width direction and that extends from a toward the center of the diaper in the width direction (a center line that divides the diaper into two parts in the width direction).
c, 72c. Then, in the expanded and expanded state of the diaper (a state in which the elastic member of each part is expanded by expanding the diaper, see FIG. 2), the abdomen of the extending portions 71b and 72b located on the most anterior side in the longitudinal direction of the diaper. Side edge 7
The maximum distance in the diaper longitudinal direction between the diaper 3 and the back side edge 74 of the extension of the first or second elastic member located on the most back side in the diaper longitudinal direction (along the diaper longitudinal direction). The maximum distance W3 measured by the above is smaller than the total (W1 + W2) of the maximum disposition widths in the longitudinal direction of the diaper in the gather forming portions of the plurality of first and second elastic members.

Here, the maximum arrangement width W1 (W2) of the plurality of first (second) elastic members means the inside of the plurality of first (second) elastic members in the expanded and expanded state of the diaper. Is the maximum value of the arrangement width measured along the longitudinal direction of the diaper (vertical direction in FIG. 2), the distance between the outer edges of the elastic members located on both outer sides. In addition, the first and the second in the present embodiment
The elastic members 71, 72 have a constant disposition width W1 (W2) over the entire area in the diaper width direction.

In the diaper 1 of the first embodiment, as shown in FIG.
As shown in FIG. 2, a plurality of first and second elastic members are arranged in the crotch part C in a state of being overlapped with each other (a state in which one elastic member 71 and the other elastic member 72 are overlapped with each other). The portions where the elastic members are overlapped with each other are the extending portions 71b and 72b of the first and second elastic members.

More specifically, the first and second elastic members 7
Reference numerals 1 and 72 each have a strip shape, and in the crotch part C, a gather forming portion 71a of the three first elastic members is formed.
Of the second elastic member, the outermost elastic member 72A and the middle elastic member 72B intersect the elastic member 71A that is most outside the leg opening (peripheral edge side), and the most elastic member of the second elastic member. The outer elastic member 72A merges with the innermost elastic member 71C of the first elastic member, and the middle elastic member 72B of the second elastic member merges and overlaps with the middle elastic member 71B of the first elastic member. On the other hand, the innermost elastic member 72C of the second elastic members joins and overlaps with the outermost elastic member 71A of the first elastic members. And 71
A and 72C, 71B and 72B, 71C and 72A are overlapped with the extending portions 71b and 72 of the elastic members.
It is b.

A plurality of first and second elastic members 71, 72
Is provided so that the extended portions 71b and 72b having such a configuration are formed, the closed leg elastic region 70 is formed along the peripheral edge of the leg opening portion, and the extended portion 71b is formed. , 72b make it difficult for the first and second elastic members to come off, so that the leg elastic region (leg opening gather) can be stably operated when worn.

In the expanded and expanded state of the diaper (see FIG. 2), the extending portions 71b, 72b are located on the most abdominal side, and the abdominal side of the extending portion of the first or second elastic member. The maximum distance W3 in the longitudinal direction of the diaper between the edge portion 73 and the back side edge portion 74 of the first or second elastic member located closest to the back side is the first and second plurality of the plurality of diapers. Elastic members 71, 7
2 The total of the maximum disposition width in the longitudinal direction of each diaper (W1
Since it is smaller than + W2), depending on the rigidity of the elastic member,
It is possible to prevent the disposable diaper in the expanded state, particularly the absorbent body thereof, from being greatly bent in the longitudinal direction by the elastic member as a trigger.

That is, normally, the pants-type disposable diaper is
The center part of the crotch (near the center line that bisects the longitudinal direction) is folded back, and the side edge portion existing between the leg opening and the waist opening is joined to form a pant-type form. Therefore, as shown in FIGS. 4 and 5, a folded-back portion 11 having a crease is formed in the center of the crotch portion, and therefore when the diaper is unfolded and placed on a plane, the folded-back portion 11 is formed. As a boundary, the absorbent body bulges upward at any of the front and rear in the longitudinal direction of the diaper, whereby a raised portion R is formed in the crotch portion C of the diaper, in which a part of the portion where the absorbent body 4 is arranged is raised upward. It When changing diapers, the buttocks of the wearer are lifted up and the buttocks are wiped, so the load is applied to the rear half of the unfolded diaper (the area near the edges of the waist opening). , Therefore, if a high-height ridge exists in the natural state (that is, in the unfolded state in the unfolded state) on the back side of the diaper, when the wearer steps on it, the reaction of the diaper The ventral side is attracted to the wearer, which interferes with changing diapers. Also,
In such a case, since the inclination is toward the wearer side, there is a possibility that the soft stool may move to the wearer side when the stool is loose. On the other hand, when the raised portion naturally exists on the abdominal side of the diaper, there is no problem as described above, but the buttocks are difficult to wipe.

In the disposable diaper 1 of the present embodiment, the maximum distance W3 is the sum of the maximum arrangement widths (W1
Since it is smaller than + W2), such a problem can be solved. The ratio [W3 / (W1 + W2)] of the maximum distance W3 and the maximum total width (W1 + W2) is 0.3 to 0 from the viewpoint of hygienic and easy diaper change and leakage prevention effect described later. In particular, the maximum distance W3 is preferably 5 to 60 mm, and the total maximum width (W1 + W2) is preferably 10 to 80 mm. Further, the maximum arrangement width W1 of the plurality of first elastic members is
Is 5 to 40 mm, the maximum disposition width W of the plurality of second elastic members is
2 is preferably 5 to 40 mm.

In the diaper of this embodiment, the region in which the plurality of first elastic members are arranged overlaps the region in which the plurality of second elastic members are arranged in the crotch part. , The rigidity of the overlapping portion of both areas is even higher.
Therefore, if such an elastic member exists across the crotch portion C, the diaper, particularly the easiness of breaking of the absorbent body is promoted, but as described above, the first and second elastic members 71, 72 are provided.
Since this does not extend to the center of the diaper in the width direction, this can be prevented.

Further, as described above, on the side portion of the absorber 4,
Extension parts 71b, 72 of the first and second elastic members 71, 72
Since b exists in an overlapping manner, it is possible to prevent the absorbent body 4 from contracting in the width direction, and at the same time, the area where the plurality of first elastic members are arranged overlaps the area where the plurality of second elastic members are arranged. Due to the high rigidity and the effect that the first and second elastic members are pulled to the abdominal side and the dorsal side when worn, both sides of the absorbent body 4 are pulled upward from the wearer's crotch to form a pocket, so that leakage occurs. The effect that the prevention effect becomes higher is exhibited. In addition, since the configuration has a wide defecation point and a pocket shape when the joint portion of the side edge is peeled off and removed when exchanging the diaper at the time of defecation, there is little risk of stool leakage in the width direction. There are also merits. Further, since the shrinkage of the absorbent body 4 in the width direction is suppressed, the absorbent body 4 has a neat appearance and has a good appearance.

Furthermore, the crotch region (in the longitudinal direction of the diaper,
In addition to the portions where the extension portions 71b and 72b are present on both sides and the vicinity thereof), the absorbent body 4 does not significantly contract in the width direction at C1.
At the end of the crotch C of the first and second elastic members 71, 72 arranged in the substantially annular leg elastic region (near the boundary between the gather forming portion and the extending portion), the tensile force is concentrated during wearing. To join. Therefore, the central portion of the absorber tends to be convex in the direction opposite to the wearer side, and the absorber side portion is likely to be lifted to the wearer side. That is,
Since the pocket structure is naturally formed in the crotch part, high leakproofness can be exhibited.

Further, the first and second elastic members 71, 72
In the vicinity of the end 73 on the center side in the width direction of the diaper, the stretched state is released so as not to exhibit elastic contractility, and no gather is formed at the portion where the extending portion is arranged. . As a result, appropriate rigidity is imparted to this portion, the pocket structure of the crotch part can be made into an ideal shape, the leakage prevention performance is improved, and the first and second elastic members are located on the side of the absorber 4. If the absorber has a high rigidity (for example, a Taber rigidity value of 10 cN · cm or more) despite the overlapping in the portions, it is possible to prevent the absorption performance from being hindered by the collapse of the elastic body.

The above-mentioned effects of the present invention become particularly remarkable when the rigidity value of the absorber according to the Taber stiffness test method (JIS P8125) is 1 to 5 cN · cm.
Such rigidity is preferable because it gives the wearer a soft feel.

In the present embodiment, the extending portions 71b and 72b of the first and second elastic members are arranged such that, in the expanded and expanded state of the disposable diaper, the longitudinal center of the diaper (the central line dividing the longitudinal direction into two equal parts). , GG line in FIG. 2). The degree of deviation to the abdominal part A side is as follows when the diaper is in the expanded and expanded state (see FIG. 2).
It is preferable that the distance D1 between the edge of the elastic member existing closest to the ventral side and the center in the longitudinal direction is 15% or less, particularly 10% or less, with respect to the total length L in the longitudinal direction of the diaper.
If the region where the first elastic member is disposed and the region where the second elastic member is disposed do not overlap, it is disadvantageous in the absorption performance for the space between the two regions, and the elastic body is wide in the longitudinal direction. Since one elastic member is unnecessarily arranged on the ventral side or the center of the crotch because it has the crossing region,
The wearing feeling may be impaired.

In the leg elastic region 70 (see FIG. 2), the first and second elastic members 71, 72 in the disposable diaper 1 of the present embodiment are adjacent to each other by the first fixing means (adhesive) in the outer layer nonwoven fabric. It is fixed to the (sheet material) and near the boundary M between the gather forming portion and the extending portion M (see FIG. 3).
In the above), the second fixing means (adhesive) applied in a narrower range than the first fixing means, or the second fixing means applied in a narrower range than the first fixing means and the first fixing means. It is fixed to the adjacent outer layer nonwoven fabric (sheet material).

The first fixing means is provided over the entire area of the sheet material adjacent to the elastic member, and when the elastic member is completely fixed to the sheet material, the first fixing means is disposed across the crotch once. Even if the elastic member is cut and divided into left and right parts, the elastic member remains in the center of the crotch in a state of exhibiting elastic stretchability, and the effect of the present invention may not be achieved. On the other hand, it may be possible to apply an annular adhesive only to the leg elastic region, but the leg openings may be pulled violently in conjunction with the movement of the wearer, so depending on the wearer's active activity, etc. The release of the stretched state of the elastic member cut at the center portion may cause the rubber to escape to a portion arranged along the edge portion of the leg opening.

By fixing the first and second elastic members as in the present embodiment, it is possible to prevent the rubber from slipping out while not exhibiting the elastic stretchability of the crotch central portion. Furthermore, by applying the second fixing means in a pattern different from that of the first fixing means, it is possible to prevent the hardness and the rough feeling due to the extra adhesive from occurring in other regions, and the texture of the diaper is not impaired. There are also merits.

The first fixing means fixes all or a part of the gather forming portions of the first and second elastic members, and the second fixing means is provided in a narrower area than the first fixing means. It is what is done. The area where the first or second fixing means is applied includes the area between dots when the adhesive is applied in a dot pattern, for example.

The portion M to which the second fixing means (adhesive) is applied is
The stretched state of the cut elastic member is released at least in the vicinity of the cut end portion caused by the cutting, while the release can be prevented from reaching the portion arranged along the edge of the leg opening. I wish I had it. As a combination of the first fixing means and the second fixing means, a combination in which the first fixing means is an adhesive and the second fixing means is an adhesive of the same kind or a different kind, and the first fixing means is an adhesive Examples include a combination in which the fixing means is heat sealing.

Next, a pants-type disposable diaper as a second embodiment of the present invention will be described with reference to FIG. The diaper of the second embodiment has the first aspect only in that the disposition aspect of the first and the first elastic members in the crotch part C is different.
Since the second embodiment is different from the first embodiment, mainly the differences from the first embodiment will be described, and the description of the same points will be omitted. For the points that are not particularly described, the above description including the preferable aspects is appropriately applied to the first embodiment.

In the diaper of the second embodiment, as shown in FIG. 6, the crotch has at least one intersection K at which the first elastic member 71 and the second elastic member 72 intersect, Intersection K located at the center of the diaper in the width direction
2, the portion arranged on the diaper width direction center side with respect to K3 is the extending portion 71b of the first and second elastic members 71, 72,
It is 72b. Then, the first and second elastic members 71, 72 in the extending portions 71b, 72b are arranged alternately in the longitudinal direction of the diaper. Although FIG. 6 shows an example in which two first and second elastic members 71 and 72 intersect, as shown in FIG. 7A, the first and second elastic members 7 and
It is also possible to make one and the other one intersect each other, or to make all of the elastic members intersect the other elastic member as shown in FIG. 7B.

The present invention is not limited to the above embodiments and can be modified in various ways. As a material for forming each member in the disposable diaper of the present invention, various known materials used in conventional disposable diapers can be used.

[0031]

The pants-type disposable diaper of the present invention can be changed hygienically after stool hygiene, is easy to wear and has a good wearing feeling, is excellent in absorption performance and leakage prevention performance, and is good in appearance. Is.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a pants-type disposable diaper of the present invention.

FIG. 2 is a plan view showing a developed and expanded state of the disposable diaper shown in FIG.

FIG. 3 is a partially enlarged plan view (top) showing an arrangement mode of elastic members in a crotch portion of the disposable diaper shown in FIG. 1 and a cross-sectional view (bottom) taken along line XX of the plan view.

FIG. 4 is a perspective view showing a state (static state) in which the disposable diaper shown in FIG. 1 is developed and statically placed on a flat horizontal surface.

5 is a schematic cross-sectional view taken along the line YY of FIG.

FIG. 6 is an enlarged plan view of an essential part showing a second embodiment of the pants-type disposable diaper of the present invention.

FIG. 7 is a schematic diagram showing a modified example of the second embodiment.

[Explanation of symbols]

1 Pants type disposable diaper 2 Top sheet 3 back sheet 4 absorber 5 outer layer 70 Leg elastic region (leg gather) 71 First Elastic Member (Leg Elastic Member) 71a gather formation part 71b extension part 71c end 72 Second elastic member (leg elastic member) 72a Gather forming part 72b extension part 72c end A ventral side B back side C inseam K intersection

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toru Hayase             Kao Stock Exchange 2606, Akabane, Kai-cho, Haga-gun, Tochigi Prefecture             Company research institute F-term (reference) 3B029 BD10 BD13                 4C098 AA09 CC03 CC11 CC12 CC27                       CE05 DD10

Claims (5)

[Claims] 1. A pants-type disposable diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorber, wherein a waist opening and a pair of leg openings are formed. A leg elastic region is formed along the periphery of the leg opening, and the leg elastic region includes a plurality of first elastic members arranged from a ventral side portion to a crotch portion and a back side. And a plurality of second elastic members arranged from the portion to the crotch part, wherein the first and second elastic members are gather forming portions arranged along the peripheral edge of the leg opening. And an extending portion extending from the gather forming portion toward the center of the diaper width direction and having an end portion at a position not reaching the center of the diaper width direction. Located on the most ventral side of the direction A ventral side edge portion of the extending portion,
The maximum distance between the extension portion located on the most back side portion side and the back side portion side edge portion is the maximum in the longitudinal direction of the diaper in the gather forming portion of each of the plurality of first and second elastic members. A pants-type disposable diaper characterized by being smaller than the total arrangement width. 2. A plurality of first and second elastic members are arranged in the crotch portion in a state of being overlapped with each other, and a portion in which both the elastic members are overlapped is the extending portion. The pants-type disposable diaper according to 1. 3. The crotch part has at least one intersection where the first elastic member and the second elastic member intersect,
The pants-type disposable diaper according to claim 1, wherein a portion disposed on the diaper width direction center side with respect to an intersection located on the diaper width direction center side is the extending portion. 4. The pants-type disposable diaper according to claim 1, wherein the first and second elastic members do not have gathers at the ends of the extending portion. 5. A part of the first and second elastic members on the center side in the width direction of the diaper overlaps with the absorber.
The pants-type disposable diaper according to any one of 1.