JPH11332912A - Shorts type diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily pass legs through a shorts type diaper and to improve fitness around the legs. SOLUTION: Both side edge parts of a front body part F and a back body part B are joined and this shorts type diaper is provided with a body opening part and a pair of right and left leg opening parts and provided with leg peripheral elastic members G1 and G2 for contracting the opening at the leg opening parts. The practically entire longitudinal directions of both side edge parts of the front body part F and the back body part B are joined and the at least leg opening part side boundary of the joined part 30 is not parallel to a diaper center line and is positioned on a diaper outer side rather than on the leg opening part side.

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, and more particularly to a pants-type disposable diaper having a front opening and a rear end which are joined to each other to have a trunk opening and a pair of left and right leg openings. The present invention relates to a pants-type diaper having an elastic member around a leg so as to contract the opening at the opening.

[0002]

2. Description of the Related Art In general, a pants-type disposable diaper is formed by, for example, ultrasonic welding or the like, in order to form a trunk opening and a pair of left and right leg openings. .

[0003] Proposals regarding this joint are disclosed in Japanese Utility Model Laid-Open No. 8-56988, in addition to Japanese Utility Model Laid-Open No. 4-44920.

In the device disclosed in Japanese Patent Application Laid-Open No. 8-56988, two joining lines are formed in the diaper width direction along the longitudinal direction, that is, the direction connecting the body opening of the product and the crotch portion. It is intended to cope with the size selected by the wearer by changing the inside (inward) position of such a joining line.

[0005]

However, the above-mentioned publications do not take into account the joining line and the effect on use, that is, the fit around the leg.

SUMMARY OF THE INVENTION Accordingly, it is a main object of the present invention to improve the ease of passing a leg of a pants-type diaper and enhance the fit around the leg.

[0007]

According to the first aspect of the present invention, which solves the above-mentioned problems, the both sides of the front and rear views are joined to form a trunk opening and a pair of left and right leg openings. In the leg opening, a pants-type diaper having a leg-surrounding elastic member so as to contract the opening, wherein substantially the entire longitudinal edges of both side edges of the front view and the back view are joined. The pants-type diaper, wherein at least the leg opening side boundary of the joint is non-parallel to the diaper center line, and the leg opening side is located outside the diaper. is there.

In the invention according to a second aspect, a plurality of the joining portions are formed along the longitudinal direction so as to be separated from each other in the width direction of the diaper,
2. The pants-type diaper according to claim 1, wherein a line connecting the ends of the leg openings is closer to the outer side of the diaper toward the leg openings.

According to a third aspect of the present invention, there is provided the pants-type diaper according to the first aspect, wherein the joint portion is formed as a single line, and the line is located outside the diaper toward the leg opening. is there.

According to a fourth aspect of the present invention, the outer boundary of the joint is along the side edge or the side edge of the product, and the line inside the joint is located outside the diaper toward the leg opening side. 2. The pants-type diaper according to claim 1, wherein a joint is formed on substantially the entire surface between the boundaries.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments shown in the drawings.

(Example of Overall Structure) FIG. 1 shows a developed state of a pants-type diaper P according to the present invention, FIG. 2 shows a front view of the pants-type diaper P in a product state, and FIG. 3 shows a side view thereof. . That is, the disposable diaper P of the present example has the outer sheet 1 and
An absorbent element 10 fixed to the inner surface of the outer sheet 1 and extending in the front-rear direction with the crotch portion 4 as a center.

As can be seen from the relationship between FIG. 1, FIG. 2 and FIG. 3, by joining both side edges of the front view F and the rear view B, the trunk opening WO and the pair of left and right leg openings LO are formed. The leg openings LO, LO are provided with leg elastic members made of a plurality of elastic yarns G1,..., G2. The form of the joint 30 will be described later in detail. Reference numeral 20 denotes a waist elastic member for improving the fit of the waist, and reference numeral 21 denotes a waist elastic member for improving the fit of the waist and preventing urine from leaking back and forth. Note that FIG.
3 and FIG. 3, the waist elastic member 20 is not shown.

The outer sheet 1 is formed by laminating and fixing a plurality of nonwoven fabrics. Between them, the left waist side 2L of the front body F, the left leg circumference 3L of the front body F, the crotch part 4, the front body F Are fixed so as to be continuous to the right waist side 2R of the front body F via the right leg circumference 3R of the front body F, and from the left waist side 5L of the back body F to the left of the back body F. 6L around the leg,
A plurality of elastic yarns G2 are connected to the crotch portion 4 and the right waist side portion 5R of the back body F via the right leg surrounding portion 6R of the back body F and so on.
Is fixed. As shown in FIGS. 2 and 3, the plurality of elastic yarns G1..., G2.
7 is formed. C indicates a central area around each leg.

The absorbent element 10 is made of, for example, a nonwoven fabric or the like, and is made of a liquid-permeable topsheet 1 which directly touches the wearer's skin.
1 and a liquid-impervious back sheet 13 made of a plastic film such as polyethylene or a water-repellent non-woven fabric, and an absorbent 12 mainly composed of cotton-like pulp and optionally wrapped with absorbent paper. The sandwiching and the peripheral portion can be formed as one integrated by bonding with, for example, a hot melt adhesive.

In the disposable diaper P of this embodiment, the front body F
Are arranged on the left waist side 2 of the front body F.
L, the crotch part 4 and the right waist side part 2R of the front body F are fixed to the outer shape sheet 1 in a bundled state, and other parts, that is, the left leg surrounding part 3L of the front body and the right leg surrounding part 3R of the front body F Are fixed to the outer sheet 1 at intervals. Also, a plurality of elastic yarns G2 on the back body F side ...
Are the left waist side part 5L, the crotch part 4 and the back body F of the back body F
Are fixed to the outer shape sheet 1 in a bundled state at the respective portions of the right waist side portion 5R, and the other portions, that is, the left leg surrounding portion 6L of the rear body F and the right leg surrounding portion 6R of the rear body F are spaced from each other. It is opened and fixed to the outer sheet 1. In the illustrated example, a plurality of elastic yarns G1... Fixed to the front body F side and a plurality of elastic yarns G2 fixed to the back body F side
Are bundled together in the crotch part 4.

Therefore, in the disposable diaper 1 of this embodiment, the interval between the plurality of elastic yarns G1..., G2.
L, 3R, 6L, 6R are the widest, and crotch 4 and waist 2L, 2R, 5L, 5R are the narrowest.

By arranging the elastic yarns in this manner, the contraction force of the portion where the plurality of elastic yarns G1... G2 are bundled and fixed, ie, the crotch portion 4 and the waist side portions 2L, 2R, 5L, 5R. Weakens. As a result, the shrinkage of the absorber 3 in the width direction is reduced, and a tightening trace is less likely to be formed on the waist side of the adherend. In this example, the leg circumferences 3L, 3R, 6L, 6
In R, the plurality of elastic yarns G1..., G2... Are fixed to the outer sheet 1 with a space between each other, so that the contraction force of this portion is equal to the crotch portion 4 and the waist side portions 2L, 2R, 5L, 5R. Stronger than. Further, the leg circumferences 3L, 3R, 6L, 6R are in contact with the thigh of the adherend on a wider surface in the width direction. Therefore,
It has good fit to the base of the thigh, hardly shows any trace of tightening, and has excellent side leakage prevention effect.

On the other hand, as the elastic member or the elastic yarn, a natural rubber yarn or a synthetic rubber yarn having an appropriate thickness and cross-sectional shape can be used. The number of elastic yarns need not be three as in the illustrated example, as long as the number is plural.

In the above example, both the plurality of elastic yarns G1 fixed to the front body F side and the plurality of elastic yarns G2 fixed to the back body F side are bundled together in the crotch portion 4. But not limited to this. That is, a plurality of elastic yarns fixed to the front body F side and a plurality of elastic yarns fixed to the back body F side can be separately bundled at the crotch portion.

In this case, as shown in FIG. 4, a plurality of elastic yarns G3 on the front body F side and a plurality of elastic yarns G4 on the back body F side are separately bundled in the crotch portion 4, and Each of the plurality of elastic yarns G3..., G4... Crosses each other, or as shown in FIG. 5, a plurality of elastic yarns G5 on the front body F side and a plurality of elastic yarns G6 on the back body F side. Can be separately bundled in the crotch portion 4, and the plurality of elastic yarns G5, G6 can be separated in the front-rear direction without crossing each other.

Further, in the above example, a plurality of elastic yarns at the crotch portion and the waist side are fixed to the outer sheet in a bundled state, and the plurality of elastic yarns at the leg circumference are fixed to the outer sheet at intervals. But not limited to this.

That is, it is only necessary that the interval between the plurality of elastic yarns at least at the crotch portion is smaller than that at the leg circumference. Therefore, as long as such a condition is satisfied, for example, a plurality of elastic yarns in all parts may be arranged at intervals. Further, when the interval between the plurality of elastic yarns at both the crotch portion and the waist side portion is smaller than that around the leg, the mutual interval between the plurality of elastic yarns at the crotch portion and the plurality of elastic yarns at the waist side portion are provided. The mutual spacing of the yarns may be different.

(About the form of the joint of the present invention)
1, FIG. 2 and FIG.
As clearly shown in FIG. 4 which is an enlarged view of the main part of FIG. 4, at least the boundary of the joint 30 on the leg opening LO side is non-parallel to the diaper center line and has an angle θ, and The diaper is located outside.

The terms "non-parallel" and "the outer side of the diaper is closer to the leg opening LO" in the present invention are based on the use state of the product. As shown in FIG. 2, the side edge may be narrowed toward the trunk opening WO by contraction of the waist elastic member 21.

In the second embodiment shown in FIG.
The joint portion 31 (30) is formed in a single wide line shape, and the line formed by the joint portion 31 is located closer to the leg opening LO to the outside of the diaper.

On the other hand, in the second embodiment shown in FIG. 5, the outer boundary of the joint 32 is along the side edge or the side edge of the product, and the line inside the joint 32 is the leg opening. The bonding portion 32 is formed on the substantially entire surface between the boundaries between these boundaries, as the LO side is located outside the diaper.

Further, a plurality of joints 33 according to the third embodiment shown in FIG. 6 are formed along the longitudinal direction so as to be separated from each other in the width direction of the diaper, and to connect these leg openings LO-side ends. However, the closer to the leg opening LO, the more outward the diaper.

The joint 34 according to the fourth embodiment shown in FIG. 7 has a single wide line shape, and the line formed by the end on the leg opening LO side is closer to the leg opening LO side. It is located outside the diaper.

It is preferable that L1 indicated by reference numerals in the drawing is 0 to 8 mm, L2 is 3 to 13 mm, θ is 5 ° to 30 °, and α is 5 ° to 50 °. Further, in any of the embodiments, the plurality of elastic yarns G1 in which the inner boundary of the product forms the inclined line and the leg circumference.
, G2 ... preferably intersect.

Generally, as shown by the imaginary line in FIG. 4, this kind of joint is set at, for example, 3 mm or more inward from the side edge of the product due to the limitation of the device and the displacement of the joint position with respect to the line. It is necessary. However,
The effective expansion and contraction length of the leg elastic member composed of the plurality of elastic yarns G1... G2 is the length connecting the inner boundary of the front body F and the inner boundary of the rear body B of the joint. is there.

On the other hand, when the form of the joint in the above-described example is adopted, the effective elastic length of the elastic member around the leg can be increased, and the total length of the elasticity is increased, and the length per required amount of contraction. The longer the length is, the softer the skin becomes and a sufficient fit for preventing leakage is provided, so that the so-called fit is improved. In addition, since the inner boundary line is inclined, it becomes a very natural form when the leg is passed, and it becomes easy to wear. In addition, it is easy to peel off from the surface where the total elongation is increased.

[0033]

As described above, according to the present invention, it becomes easier to wear a pants-type diaper, and moreover, there are provided advantages such as an improved fit around the leg.

[Brief description of the drawings]

FIG. 1 is a development view of a pants-type diaper according to the present invention.

FIG. 2 is a front view of the pants-type diaper according to the present invention when not worn.

FIG. 3 is a side view thereof.

FIG. 4 is an enlarged view of a main part of FIG. 1 showing a first embodiment of a joint portion of the present invention in comparison with a conventional example.

FIG. 5 is an enlarged view of a main part showing a second embodiment of the joint according to the present invention.

FIG. 6 is an enlarged view of a main part showing a third embodiment of the joint according to the present invention.

FIG. 7 is an enlarged view of a main part showing a fourth embodiment of the joint according to the present invention.

[Explanation of symbols]

P: pants-type diaper, 1: outer sheet, 2L, 2R: waist side of front body F, 3L, 3R: leg circumference of front body F, 4
... crotch, 5L, 5R ... waist side of back body F, 6L, 6R
... leg around the back body F, 7 ... gather, 10 ... absorber,
11 liquid-permeable top sheet, 12 ... absorbent, 13 liquid-impermeable back sheet, G1 ... elastic yarn on the front body F side, G2 ... elastic yarn on the back body F side, 20 ... waist elastic member, 21 ... waist circumference Elastic members, 30 to 34 ... joints.

Claims (4)

[Claims] 1. An elastic member around a leg which joins both side edges of a front view and a back view, and has a trunk opening and a pair of left and right leg openings so as to shrink the opening in the leg opening. Pants-type diaper having, the substantially both sides of the front view and the back view substantially the entire longitudinal direction is joined, at least the leg opening side boundary of the joint, the diaper center line A pants-type diaper that is non-parallel to the diaper, and is positioned outside the diaper toward the leg opening side. 2. A plurality of joints are formed in the diaper width direction along the longitudinal direction so as to be spaced apart from each other in the width direction of the diaper, and a line connecting these leg opening side ends is positioned closer to the outer side of the diaper toward the leg opening. The pants-type diaper according to claim 1, wherein 3. The pants-type diaper according to claim 1, wherein the joint portion is formed as a single line, and the line is located closer to the leg opening than the diaper. 4. The outer boundary of the joint is along the side edge or side edge of the product, and the line inward of the joint is located closer to the side of the leg opening than the diaper, and substantially between these boundaries. The pants-type diaper according to claim 1, wherein a joint is formed on the entire surface.