JP6810765B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

As an elastic structure around the waist of the absorbent article, there is one provided with an elongated elastic elastic member provided along the elastic direction between the two sheet layers. For example, in Patent Document 1, both ends of the elastic stretchable member are fixed to two sheet layers, and the elastic stretchable member is a free portion that is not fixed to the two sheet layers between the fixed ends. Further disclosed is an elastic structure having a sheet joint in which two sheet layers are bonded via a hot melt adhesive in the region between the fixed ends. It is said that the sheet joints that are continuous in the expansion and contraction direction form wavy (folds) so that the two sheet layers follow each other, and the tops of the folds bend gently, resulting in a flexible feel.

Japanese Patent No. 6254625

In an absorbent article, an absorbent body having an absorbent core is generally arranged on the skin side of the waistline, and the skin-side sheet layer of the two sheet layers is fixed to the absorbent body. .. In addition, the elastic structure around the waistline is required to be flexible to the touch. However, when the stretchable structure of Patent Document 1 is applied to the waistline portion, the elastic stretchable member is not fixed to the two sheet layers in the region where the waistline portion and the absorbent core overlap in the width direction. Therefore, the seat layer on the skin side and the absorbent core, which are not fixed to the elastic elastic member, are likely to be displaced in the vertical direction with respect to the position where the elastic elastic member is in close contact with the wearer. Insufficient fixation of the absorbent core to the wearer in this way leads to leakage of excrement.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the flexibility of the waist circumference of the absorbent article and to suppress the misalignment of the absorbent core.

The main invention for achieving the above object is an absorbent article having a width direction and a longitudinal direction, a pair of waist circumferences, and an absorbent body having an absorbent core in a deployed state. At least one of the pair of waist circumference portions has a pair of seats and a plurality of stretchable members arranged between the pair of seats that expand and contract in the width direction, and each of the stretchable members has the same stretchable member. One of the waist circumferences has a pair of end fixing portions that are continuously arranged from one end to the other end in the width direction and both ends in the width direction are fixed to the pair of sheets. The plurality of elastic members include a first elastic member and a second elastic member, and the first elastic member is fixed to the pair of seats inside the end fixing portion in the width direction. The second telescopic member has a central fixed portion fixed to the pair of sheets over at least the entire area overlapping the absorbent core in the width direction. Moreover, it is an absorbent article characterized in that it is arranged in a region overlapping the absorbent body in the longitudinal direction.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to suppress the misalignment of the absorbent core while improving the flexibility of the waist circumference of the absorbent article.

It is a schematic perspective view of the pants type disposable diaper 1. It is a schematic plan view of the diaper 1 in the expanded state and the extended state. FIG. 2 is a schematic cross-sectional view taken along the line II of FIG. It is a schematic plan view of the ventral waist circumference portion 20 of the first embodiment. It is a schematic plan view of the ventral waist circumference portion 20 of the modification 1. It is a schematic plan view of the ventral waist circumference portion 20 of the modification 2. It is a schematic plan view of the ventral waist circumference portion 20 of the second embodiment. It is a schematic plan view of the ventral waist circumference portion 20 of the third embodiment. It is a schematic plan view of the ventral waist circumference portion 20 of the third embodiment. It is a schematic plan view of the ventral waist circumference portion 20 of the third embodiment. It is a schematic perspective view which shows an example of the sheet 21, 22 which has a plurality of openings 25.

The description of the present specification and the accompanying drawings will clarify at least the following matters.
That is, in the unfolded state, it is an absorbent article having a width direction and a longitudinal direction, and having a pair of waist circumference portions and an absorbent body having an absorbent core, and is among the pair of waist circumference portions. At least one of the two sheets has a pair of sheets and a plurality of elastic members arranged between the pair of sheets that expand and contract in the width direction, and each of the elastic members has the width of the waist circumference portion of the one. The plurality of telescopic members have a pair of end fixing portions that are continuously arranged from one end in the direction to the other end and both ends in the width direction are fixed to the pair of sheets. It has one telescopic member and a second telescopic member, and the first telescopic member has a non-fixed portion that is not fixed to the pair of seats inside the end fixed portion in the width direction. The second telescopic member has a central fixing portion fixed to the pair of sheets over at least the entire region overlapping the absorbent core in the width direction, and has the absorbency in the longitudinal direction. An absorbent article characterized in that it is placed in an area that overlaps the body.

According to such an absorbent article, the non-fixed portion of the first elastic member can improve the flexibility of the waist circumference, and the central fixed portion of the second elastic member can suppress the displacement of the absorbent core. ..

Such an absorbent article, wherein the plurality of elastic members have a plurality of the second elastic members.

According to such an absorbent article, the displacement of the absorbent core can be further suppressed by the central fixing portion of the plurality of second elastic members.

Such an absorbent article, wherein the plurality of elastic members have a plurality of the first elastic members.

According to such an absorbent article, the flexibility of the waist circumference portion can be further improved by the non-fixed portion of the plurality of first elastic members.

An absorbent article, wherein at least one second telescopic member is arranged in a region overlapping the absorbent core in the longitudinal direction.

According to such an absorbent article, the absorbent core is easily fixed at a position where the second elastic member is in close contact with the wearer, and the displacement of the absorbent core can be further suppressed.

In such an absorbent article, at least one said second telescopic member has a non-fixed portion which is not fixed to the pair of sheets between the end fixing portion and the central fixing portion in the width direction. An absorbent article characterized by that.

According to such an absorbent article, the flexibility of the waist circumference portion can be further improved by the non-fixed portion of the second elastic member.

In such an absorbent article, the central fixing portion of at least one second telescopic member is continuously arranged from the end fixing portion on one side in the width direction to the end fixing portion on the other side. An absorbent article characterized by being made.

According to such an absorbent article, the absorbent main body is easily fixed at a position where the second elastic member is in close contact with the wearer, and the displacement of the absorbent core can be further suppressed.

The non-fixed portion of the absorbent article, which the at least one first telescopic member has, is characterized in that the non-fixed portion is arranged over at least the entire region overlapping the absorbent core in the width direction. Absorbent article.

According to such an absorbent article, the flexibility of the central portion in the width direction of the waist circumference portion can be improved.

Among the plurality of elastic members, the elastic member other than the first elastic member is the second elastic member, and all the first elastic members are at least said in the width direction. An absorbent article characterized in that it has a central fixed portion fixed to the pair of sheets over the entire area overlapping the absorbent core, and all the second telescopic members have the non-fixed portion. ..

According to such an absorbent article, it is possible to suppress the misalignment of the absorbent core while improving the flexibility of the waist circumference. Further, the central fixing portion makes it easy to maintain the distance between the elastic members in the longitudinal direction, and can impart elasticity over a wide range of the waist circumference portion.

The absorbent article, characterized in that all the first stretchable members and all the second stretchable members have the same length in the width direction of the central fixing portion. ..

According to such an absorbent article, the formation of the central fixing portion becomes easy.

In such an absorbent article, the length in the width direction of the region between the end fixing portion on one side in the width direction and the end fixing portion on the other side is the width of the absorbent body. An absorbent article characterized by being wider than the length in the direction.

According to such an absorbent article, the length of the end fixing portion is shortened, and the flexibility of the waist circumference portion can be improved.

In such an absorbent article, the one waist circumference portion is a first sheet joint portion to which the pair of sheets are joined to each other inside the end fixing portion in the width direction, and the width thereof. An absorbent article characterized in that it does not have a first sheet joint that is arranged inside the end fixing portion in the direction without intersecting a portion that fixes the telescopic member to the pair of sheets.

According to such an absorbent article, the flexibility of the waist circumference can be improved as compared with the case where the waist circumference has the first sheet joint.

The absorbent article is characterized in that one of the waist circumference portions has a second sheet joint portion in which the pair of sheets are joined to each other inside the end portion fixing portion in the width direction. Absorbent article.

According to such an absorbent article, when the elastic member contracts, the second sheet joint can suppress the floating of the sheet, and the appearance of the absorbent article can be improved.

In such an absorbent article, the second sheet joint extends longer in the width direction than in the longitudinal direction, and the elastic member is formed into the pair of sheets inside the end fixing portion in the width direction. An absorbent article characterized in that it is arranged at a distance in the longitudinal direction from a portion to be fixed.

According to such an absorbent article, when the elastic member contracts, relatively fine vertical wrinkles are likely to be formed by the second sheet joint, and the appearance of the absorbent article can be improved.

An absorbent article, wherein the second sheet joint is arranged outside the absorbent core in the width direction.

According to such an absorbent article, the flexibility of the waist circumference can be improved by shortening the length of the sheet joint in the width direction as much as possible.

In the pants-type absorbent article, at least one of the pair of sheets is provided with a plurality of openings penetrating the front and back at intervals, and the non-fixed portion is provided in the waist circumference portion. A pants-type absorbent article, characterized in that the area where the hole is formed and the area where the hole is provided overlap each other.

According to such a pants-type absorbent article, since the opening is provided in the region overlapping the highly flexible non-fixed portion in the waist circumference, the influence of hardening of the outer peripheral edge of the opening is affected. It becomes relatively small, and it is possible to prevent the tactile sensation around the waist from becoming hard. Further, since the non-fixed portion is not provided with the adhesive, it is difficult for the wearer to feel the adhesive feeling through the holes. Therefore, it is possible to improve the flexibility and breathability of the waist circumference without causing discomfort to the wearer.

=== Embodiment ===
Hereinafter, embodiments will be described with reference to a pants-type disposable diaper for infants as an absorbent article according to the present invention. However, the absorbent article according to the present invention is not limited to the above, and can be applied to pants-type disposable diapers for adults, tape-type disposable diapers, sanitary shorts, and the like.

=== Pants-type disposable diaper 1 configuration ===
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter referred to as “diaper”). FIG. 2 is a schematic plan view of the diaper 1 in the unfolded state and the extended state. FIG. 3 is a schematic cross-sectional view taken along the line II of FIG. The "deployed state" in the pants-type diaper is a state in which the locking portions 40, which will be described later, are disjointed to separate the pair of waist circumference portions 20 and 30, and the diaper 1 is opened in the longitudinal direction.

In the pants-shaped state shown in FIG. 1, the diaper 1 has a width direction, a vertical direction, and a front-rear direction, and a waist circumference opening BH and a pair of leg circumference openings LH are formed. In the vertical direction, the waist circumference side is the upper side and the inseam side is the lower side. In the anterior-posterior direction, the ventral side of the wearer is the front side and the dorsal side of the wearer is the rear side. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are laminated is referred to as the thickness direction, the side in the thickness direction that contacts the wearer is the skin side, and the side that does not contact the wearer is non. On the skin side.

Further, the diaper 1 has a pair of waist circumference portions 20 and 30 and an absorbent main body 10. Of the pair of waist circumferences 20 and 30, the one that is applied to the ventral side of the wearer is referred to as the ventral waist circumference 20, and the one that is applied to the back side of the wearer is referred to as the dorsal waist circumference 30.

Further, the diaper 1 has a width direction and a longitudinal direction in the unfolded state shown in FIG. 2, and the end of the absorbent body 10 on one side in the longitudinal direction is located at the center of the ventral waist circumference portion 20 in the width direction. The portion is arranged, and the end portion on the other side in the longitudinal direction of the absorbent main body 10 is arranged at the central portion of the dorsal waist circumference portion 30 in the width direction. In the unfolded diaper 1, the absorbent body 10 is folded in half at substantially the center in the longitudinal direction thereof, and the ventral waist circumference 20 and the dorsal waist circumference 30 are each engaged with a pair of locking portions 40 in the width direction. By being locked in, the diaper 1 in the pants-type state shown in FIG. 1 is obtained. The longitudinal direction of the unfolded diaper 1 is along the vertical direction of the pants-shaped diaper 1. Further, as a locking method in the locking portion 40, welding, bonding with an adhesive, or the like can be exemplified.

As shown in FIG. 3, the absorbent body 10 is arranged on the absorbent body 11, the liquid-permeable top sheet 12 arranged on the skin side of the absorbent body 11, and on the non-skin side of the absorbent body 11. It has a liquid-impermeable back sheet 13 and an exterior sheet 14 arranged on the non-skin side of the back sheet 13.

As shown in FIG. 2, the absorber 11 has an absorbent core 11A that absorbs and retains excrement such as urine, and a liquid-permeable core wrap sheet 11B that covers the absorbent core 11A. As the absorbent core 11A, a liquid absorbent fiber such as pulp containing a highly absorbent polymer (SAP) formed into a predetermined shape can be exemplified. The absorbent core 11A may not be covered with the core wrap sheet 11B.

Further, as shown in FIG. 2, leg-surrounding elastic members 15 are provided on both sides of the absorbent body 10 in the width direction, and the diaper 1 fits around the wearer's legs.

As shown in FIG. 3, the ventral waist circumference 20 and the dorsal waist circumference 30 are composed of flexible skin-side sheets 21 and 31 such as non-woven fabric and non-skin-side sheets 22 and 32 (a pair of sheets), respectively. It has a plurality of elastic members 23, 33 around the waist, which are arranged between the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 and expand and contract in the width direction. The plurality of elastic members 23 and 33 around the waist are arranged side by side at intervals in the vertical direction (longitudinal direction) between the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32, and are arranged in the width direction. It is fixed in the extended state. Therefore, the ventral waist circumference 20 and the dorsal waist circumference 30 expand and contract in the width direction to fit the wearer's waist circumference. Examples of the elastic members 23 and 33 around the waist include thread-shaped elastic members such as rubber threads and elongated elastic sheets. Further, the configurations of the waist circumference portions 20 and 30 are not limited to those shown in the drawings, and may be, for example, a configuration of three or more layers in which different sheets are laminated on a pair of sheets, or one sheet is bent. It may be configured as a pair of sheets.

Further, in the present embodiment, as a pants-type disposable diaper, the ventral waist circumference 20 and the dorsal waist circumference 30 are separated, and the ventral waist circumference 20, the dorsal waist circumference 30, and the absorbent body 10 3 The so-called three-piece type having a member has been exemplified, but the present invention is not limited to this. For example, the ventral waist circumference 20 and the dorsal waist circumference 30 are formed of one continuous member via the inseam, and the ventral waist circumference 20 and the dorsal waist circumference 30 are integrated into an exterior. It may be a so-called two-piece type pants-type disposable diaper having two members, a member and an absorbent main body.

=== About waist circumferences 20 and 30 ===
(First Embodiment)
FIG. 4 is a schematic plan view of the ventral waist circumference portion 20 of the first embodiment. FIG. 5 is a schematic plan view of the ventral waist circumference portion 20 of the modified example 1. FIG. 6 is a schematic plan view of the ventral waist circumference portion 20 of the modified example 2.

Hereinafter, the configuration of the pair of waist circumferences 20 and 30 will be described by taking the ventral waist circumference 20 as an example. However, at least one of the pair of waist circumferences 20 and 30 may have the following configuration. That is, both waist circumferences 20 and 30 may have the following configurations, or the dorsal waist circumference 30 may have the following configuration unlike the ventral waist circumference 20 and the abdomen. The side waist circumference portion 20 may have the following configuration, and the dorsal waist circumference portion 30 may differ from the following configuration. The same applies to other embodiments.

The plurality of waist circumference telescopic members 23 included in the ventral waist circumference portion 20 (hereinafter referred to as “girth circumference portion 20”) are continuously arranged from one end to the other end in the width direction of the waist circumference 20. It has a "continuous telescopic member 231 (expandable member of the present invention)" and a plurality of "discontinuous telescopic members 232" arranged discontinuously in the width direction. The discontinuous telescopic member 232 is arranged below the continuous telescopic member 231.

Each continuous telescopic member 231 has a "pair of end fixing portions 50" whose both ends in the width direction are fixed to the skin side sheet 21 and the non-skin side sheet 22. The fixing method in the end fixing portion 50 is not particularly limited, and for example, fixing with an adhesive applied to the continuous expansion / contraction member 231 or a skin side sheet 21 and a non-skin side sheet 22 (hereinafter, "a pair of sheets 21"). , 22 ") can be exemplified by well-known methods such as fixing with an adhesive applied to the inner surface and fixing with a pair of welded portions crossing the continuous expansion / contraction member 231.

Further, in FIG. 4, the pair of end fixing portions 50 are arranged inside the pair of locking portions 40 in the width direction separately from the pair of locking portions 40. However, it is not limited to this. The pair of locking portions 40 may be used as a pair of end fixing portions. That is, the diaper 1 does not have to have the end fixing portion 50 shown in FIG.

Further, the plurality of continuous expansion / contraction members 231 have a plurality of "first continuous expansion / contraction members 231a". The first continuous expansion / contraction member 231a (the first expansion / contraction member of the present invention) has a "non-fixing portion 51" that is not fixed to a pair of sheets 21 and 22 inside the end fixing portion 50 in the width direction. In the first embodiment (FIG. 4), the non-fixing portion 51 is continuously arranged from the end fixing portion 50 on one side in the width direction to the end fixing portion 50 on the other side.

The portion where the waistline elastic member 23 is fixed to the pair of sheets 21 and 22 has higher rigidity due to the curing of the adhesive or the like than the portion where the waist circumference elastic member 23 is fixed. Therefore, since the first continuous expansion / contraction member 231a has the non-fixed portion 51, for example, the waist circumference expansion / contraction member 23 is fixed to the pair of seats 21 and 22 over almost the entire area. The area can be reduced. Therefore, the flexibility of the waist circumference portion 20 can be improved, and the comfort of wearing the waist circumference portion 20 can be improved.

However, it is assumed that all the continuous expansion / contraction members 231 are assumed to be the first continuous expansion / contraction member 231a shown in FIG. Then, in the region R1 where the waist circumference portion 20 and the absorbent core 11A overlap in the width direction, the continuous expansion / contraction member 231 is not fixed to the pair of sheets 21 and 22 at all. Therefore, the skin-side sheet 21 and the absorbent core 11A indirectly fixed to the skin-side sheet 21 can move in the vertical direction with respect to the continuous expansion / contraction member 231. Then, the skin-side sheet 21 and the absorbent core 11A are displaced in the vertical direction with respect to the position where the continuous elastic member 231 is in close contact with the wearer, and the absorbent core 11A is not sufficiently fixed to the wearer. As a result, excrement is likely to leak, and the comfort of wearing the diaper 1 is reduced.

Therefore, it is assumed that the plurality of continuous expansion / contraction members 231 have a "second continuous expansion / contraction member 231b". The second continuous expansion / contraction member 231b (the second expansion / contraction member of the present invention) is fixed to a pair of sheets 21 and 22 over at least the entire area of the region R1 overlapping the absorbent core 11A in the width direction. , And is arranged in a region overlapping the absorbent body 10 in the longitudinal direction.

By doing so, the second continuous elastic member 231b that overlaps with the absorbent main body 10 in the front-rear direction (thickness direction) of the diaper 1 is fixed to the skin-side sheet 21. Further, in the region R1 where the absorbent core 11A exists at least in the width direction, the second continuous expansion / contraction member 231b is fixed to the skin side sheet 21. Therefore, the skin-side sheet 21 is also fixed at a position where the second continuous elastic member 231b is in close contact with the wearer, and the absorbent core 11A indirectly fixed to the skin-side sheet 21 is also less likely to be displaced in the vertical direction. .. As a result, the fit of the absorbent core 11A to the wearer is increased, excrement is less likely to leak, and the comfort of wearing the diaper 1 is improved.

In particular, in the first embodiment (FIG. 4), the central fixing portion 52 included in the second continuous telescopic member 231b is continuously connected from the one-sided end fixing portion 50 in the width direction to the other end fixing portion 50. Have been placed. In this way, when the central fixing portion 52 extends long beyond the range R2 in which the absorbent body 10 exists in the width direction, the skin side sheet 21 and the skin side sheet 21 and the second continuous elastic member 231b are in close contact with the wearer. The absorbent body 10 is also fixed. Since the absorbent main body 10 is less likely to be displaced in the vertical direction, the absorbent core 11A included in the absorbent main body 10 is also less likely to be displaced in the vertical direction.

However, the present invention is not limited to the above. The central fixing portion 52 of the second continuous expansion / contraction member 231 may be arranged at least in the range R1 in which the absorbent core 11A exists in the width direction. Therefore, for example, as in the modified example 2 (FIG. 6), the second continuous expansion / contraction member 231b is not fixed to the pair of seats between the end fixing portion 50 and the center fixing portion 52 in the width direction. It may have a part 53. By shortening the length of the central fixing portion 52 in the width direction in this way, the area of the portion having high rigidity can be reduced, and the flexibility of the waist circumference portion 20 can be improved. In particular, as shown in FIG. 6, the position of the side end of the absorbent core 11A and the position of the side end of the central fixing portion 52 in the width direction coincide with each other, so that the flexibility of the waist circumference portion 20 is further improved. be able to.

In the modified example 2 (FIG. 6), the non-fixed portions 53 are arranged on both sides of the central fixed portion 52, but the non-fixed portions 53 may be arranged only on one side of the central fixed portion 52 (not shown). ). That is, the end fixing portion 50 on one side in the width direction and the center fixing portion 52 may be continuous, or the end fixing portion 50 on the other side in the width direction and the center fixing portion 52 may be continuous. ..

Further, the plurality of continuous expansion / contraction members 231 may have at least one second continuous expansion / contraction member 231b. By doing so, the vertical misalignment of the absorbent core 11A can be suppressed. In the first embodiment (FIG. 4), among the plurality of continuous expansion / contraction members 231 except for one second continuous expansion / contraction member 231b, the first continuous expansion / contraction member 231a is used.

As described above, it is preferable that the plurality of continuous expansion / contraction members 231 have a plurality of first continuous expansion / contraction members 231a. By increasing the number of the first continuous expansion / contraction members 231a having the non-fixed portion 51, the area of the highly rigid portion can be reduced. Therefore, the flexibility of the waist circumference portion 20 can be further improved.

However, the present invention is not limited to the above. As in the modified example 1 (FIG. 5), the plurality of continuous expansion / contraction members 231 may have a plurality of second continuous expansion / contraction members 231b. By doing so, the skin side sheet 21 is also fixed at a position where the plurality of second continuous expansion / contraction members 231b are in close contact with the wearer. Therefore, the vertical misalignment of the absorbent core 11A can be further suppressed. When a plurality of second continuous expansion / contraction members 231b are present, the lengths of the central fixing portions 52 in the width direction may be different (not shown).

Further, a central fixing portion 52 of the absorbent main body 10 and the second continuous expansion / contraction member 231b is located at the center portion in the width direction of the waist circumference portion 20. Therefore, the wearer tends to feel the hardness of the central portion in the width direction of the waist circumference portion 20. Therefore, as in the first embodiment (FIG. 4), the non-fixed portion 51 of the first continuous telescopic member 231a may be arranged over at least the entire region R1 overlapping the absorbent core 11A in the width direction. .. By doing so, flexibility can be imparted to the central portion in the width direction of the waist circumference portion 20, and the wearing comfort is improved.

In particular, in the first embodiment (FIG. 4), the non-fixed portion 51 of the first continuous telescopic member 231a is continuously long from the one-sided end fixing portion 50 in the width direction to the other-side end fixing portion 50. It is extending. Therefore, the flexibility of the waist circumference portion 20 can be further improved.

Further, as in the first embodiment (FIG. 4), the continuous telescopic member 231 located at the lowermost position (inside in the longitudinal direction) may be the second continuous telescopic member 231b. By doing so, the second continuous elastic member 231b closest to the absorbent core 11A in the vertical direction is fixed to the skin side sheet 21. Therefore, the absorbent core 11A is less likely to be displaced in the vertical direction with respect to the position where the second continuous expansion / contraction member 231b is in close contact with the wearer. However, the present invention is not limited to the above, and the second continuous expansion / contraction member 231b may be located above the continuous expansion / contraction member 231 located at the lowest position, as in the modified example 2 (FIG. 6).

Further, as in the first modification (FIG. 5), at least one second continuous expansion / contraction member 231b may be arranged in a region overlapping the absorbent core 11A in the vertical direction (longitudinal direction). By doing so, the skin side sheet 21 and the absorbent core 11A are fixed at a position where the second continuous elastic member 231b is in close contact with the wearer. Therefore, the vertical misalignment of the absorbent core 11A can be further suppressed.

Further, as shown in FIG. 4, the width direction of the region between the end fixing portion 50 on one side in the width direction and the end fixing portion 50 on the other side (between the inner edges of the pair of end fixing portions 50). The length W1 of is preferably longer than the length W2 in the width direction of the absorbent body 10 (W1> W2). Then, by making the length of the end fixing portion 50 in the width direction relatively short, the flexibility of the waist circumference portion 20 can be improved.

When comparing the lengths W1 and W2 in the width direction, it is preferable to carry out the diaper 1 in a state of being stretched without wrinkles. Specifically, it is in a state of being stretched until the dimensions of the members (for example, the skin side sheet 21 and the like) constituting the waist circumference portion 20 are equal to or close to the dimensions of the member alone.

Further, the plurality of continuous expansion / contraction members 231 may have a continuous expansion / contraction member 231 other than the first continuous expansion / contraction member 231a and the second continuous expansion / contraction member 231b. For example, as in the modified example 1 (FIG. 5), the third continuous expansion / contraction member 231c having no non-fixed portion 51 may be arranged in the region outside the absorbent body 10 in the longitudinal direction. That is, the third continuous telescopic member 231c has a central fixing portion 54 that is continuously fixed to a pair of sheets 21 and 22 from the end fixing portion 50 on one side in the width direction to the end fixing portion 50 on the other side.

Also in this case, in the region R1 where the absorbent core 11A exists in the width direction, the skin side sheet 21 is also fixed at a position where the third continuous elastic member 231c is in close contact with the wearer. Therefore, the absorbent core 11A is less likely to be displaced in the vertical direction. The number of the third continuous expansion / contraction member 231c may be singular or plural.

Further, as shown in FIG. 4, the waist circumference portion 20 has a discontinuous telescopic member 232 below the second continuous telescopic member 213b (inside in the longitudinal direction). The discontinuous telescopic member 232 is discontinuous in at least a part of the region R1 that overlaps with the absorbent core 11A in the width direction. That is, a part of the waist circumference stretchable member 23 that overlaps the absorbent body 10 in the longitudinal direction has a non-stretchable region (discontinuous portion) in the central portion in the width direction. Therefore, the contraction of the absorbent core 11A due to the waist circumference elastic member 23 can be suppressed, and the flatness of the absorbent core 11A can be ensured.

The discontinuous telescopic member 232 may also have an end fixing portion 55 and a non-fixing portion 56. The end fixing portion 55 is a portion where both ends in the width direction of the continuous portion of the discontinuous telescopic member 232 are fixed to a pair of sheets 21 and 22. The non-fixing portion 56 is a portion where the discontinuous telescopic member 232 is not fixed to the pair of sheets 21 and 22 between the end fixing portions 55. Specifically, as shown in FIG. 4, a pair of end fixing portions 55 are arranged at one end in the width direction of the waist circumference portion 20 and one end in the width direction of the absorbent core 11A. , A non-fixed portion 56 is arranged between them, and a pair of end fixing portions 55 are arranged at the other end in the width direction of the absorbent core 11A and the other end in the width direction of the waist circumference portion 20. Is arranged, and a non-fixed portion 56 is arranged between them.

As described above, the discontinuous telescopic member 232 also has the non-fixed portion 56, so that the flexibility of the waist circumference portion 20 is improved. However, the present invention is not limited to the above, and the discontinuous telescopic member 232 may not have the non-fixed portion 56. Further, the waist circumference portion 20 does not have to have the discontinuous telescopic member 232.

Further, the waist circumference portion 20 of the first embodiment does not have a sheet joint portion to which a pair of sheets 21 and 22 are joined to each other inside the end portion fixing portion 50 in the width direction. The sheet joint portion (first sheet joint portion of the present invention) is a portion (for example, the central fixing portion 52, which fixes the continuous elastic member 231 to the pair of sheets 21 and 22 inside the end fixing portion 50 in the width direction. 54 etc., which is a part where a pair of sheets 21 and 22 are joined with the elastic member 23 around the waist sandwiched), and a part which is discontinuous and is arranged at intervals in the vertical direction (longitudinal direction). .. That is, the sheet joint portion is a portion that is arranged without intersecting the waist circumference elastic member 23, and is a portion that directly joins the facing surfaces of the pair of sheets 21 and 22. Specifically, the sheet joint portions 60 and 61 shown in the third embodiment (FIGS. 8 and 9) described later can be exemplified.

At the sheet joint portion, the rigidity is increased as compared with the portion where the pair of sheets 21 and 22 are not joined to each other. Therefore, since the waist circumference portion 20 does not have the sheet joint portion as in the first embodiment, the flexibility of the waist circumference portion 20 can be further improved.

(Second Embodiment)
FIG. 7 is a schematic plan view of the ventral waist circumference portion 20 of the second embodiment. In the second embodiment, the first continuous telescopic member 231a is fixed to the pair of sheets 21 and 22 over at least the entire area R1 overlapping the absorbent core 11A in the width direction, similarly to the second continuous telescopic member 231b. It is assumed that the "central fixing portion 57" is provided.

However, the first continuous expansion / contraction member 231a also has a non-fixed portion 51. Therefore, the central fixing portion 57 of the first continuous telescopic member 231a is not continuous from the end fixing portion 50 on one side in the width direction to the end fixing portion 50 on the other side. In FIG. 7, non-fixed portions 51 are arranged on both sides of the central fixed portion 57. However, the present invention is not limited to this, and the non-fixed portion 51 may be arranged only on one side of the central fixed portion 57 (not shown).

As described above, since the first continuous elastic member 231a also has the central fixing portion 57, the first continuous elastic member 231a is in close contact with the wearer in the region R1 where the absorbent core 11A exists in the width direction on the skin side. The sheet 21 is also fixed, and the absorbent core 11A is less likely to be displaced in the vertical direction.

Further, as shown in FIG. 7, when the continuous expansion / contraction member 231 other than the first continuous expansion / contraction member 231a is the second continuous expansion / contraction member 231b among the plurality of continuous expansion / contraction members 231, all the first continuous expansion / contraction members are It is preferable that 231a has a central fixed portion 57 and all the second continuous telescopic members 231b have a non-fixed portion 53. That is, it is preferable that all the continuous expansion / contraction members 231 have the central fixed portions 52, 57 and the non-fixed portions 51, 53. In that case, the continuous elastic member 231 outside the absorbent main body 10 in the longitudinal direction corresponds to the first continuous elastic member 231a, and the continuous elastic member 231 overlapping the absorbent main body 10 in the longitudinal direction is the second continuous elastic member 231b. Corresponds to.

By doing so, the central fixing portions 52 and 57 of all the continuous expanding and contracting members 231 suppress the vertical displacement of the absorbent core 11A, and the non-fixing portions 51 and 53 of all the continuous expanding and contracting members 231. The flexibility of the waist circumference 20 can be improved.

Further, the movement of the continuous telescopic member 231 in the vertical direction is regulated by the central fixing portions 57 and 52 of all the continuous telescopic members 231. Therefore, the distance between the continuously expanding / contracting members 231 in the vertical direction is maintained, and the elasticity can be imparted over a wide range of the waist circumference portion 20.

Further, as shown in FIG. 7, it is preferable that all the first continuous expansion / contraction members 231a and all the second expansion / contraction members 231b have the same lengths W3 in the width direction of the central fixing portions 52 and 57, respectively. By doing so, it becomes easy to control the formation of the central fixing portions 52 and 57 (for example, the adhesive coating process) during the production of the diaper 1. When comparing the lengths W3 of the central fixing portions 52 and 57 in the width direction, it is preferable to perform the operation in a state where the waist circumference portion 20 is extended without wrinkles.

Further, similarly to the first embodiment (FIG. 4), the waist circumference portion 20 of the second embodiment (FIG. 7) also has a discontinuous telescopic member 232 whose central portion in the width direction is discontinuous. Good. Then, in the first embodiment, even if the end fixing portions (see: 55a and 55b in FIG. 4) arranged apart from each other at both ends in the width direction of the absorbent core 11A are continuous in the width direction. Good. In this case, the length in the width direction of the end fixing portions 55 (55a, 55b) of the discontinuous telescopic member 232 may be equal to the length in the width direction of the central fixing portions 52, 57 of the continuous telescopic member 231. By doing so, it becomes easy to control the formation of the central fixing portions 52 and 57 and the end fixing portions 55 (for example, the adhesive coating process) during the manufacture of the diaper 1. Further, as shown in FIG. 7, when the end fixing portion 55 extends long in the width direction over a wide range of the discontinuous portion (non-stretchable portion) of the discontinuous telescopic member 232, the non-skin in the discontinuous portion The floating of the side sheet 22 can be suppressed. Therefore, the appearance of the diaper 1 can be improved.

However, the present invention is not limited to the above. For example, the plurality of continuous expansion / contraction members 231 may only have at least one first continuous expansion / contraction member 231a having a central fixing portion 57. Further, the lengths of the central fixing portions 52 and 57 of the plurality of continuous expansion / contraction members 231 in the width direction may not be equal. Further, the waist circumference portion 20 of the second embodiment also does not have a sheet joint portion as in the first embodiment.

(Third Embodiment)
8 to 10 are schematic plan views of the ventral waist circumference portion 20 of the third embodiment. In the third embodiment, the waist circumference portion 20 is inside the end fixing portion 50 in the width direction, and the pair of sheets 21 and 22 are joined to each other in the sheet joining portions 60 to 62 (second sheet joining of the present invention). Part) shall have. Examples of the method of joining the pair of sheets 21 and 22 in the sheet joining portions 60 to 62 include welding and joining with an adhesive.

Hereinafter, the sheet joint portions 60 to 62 will be described by taking as an example the waist circumference portion 20 having the continuous stretchable member 231 and the discontinuous stretchable member 232 shown in FIG. However, any of the waist circumference portions 20 described in the first embodiment and the second embodiment may have the sheet joint portions 60 to 62 described below.

A pair of seats 21 and 22 are separated from each other at the non-fixed portions 51 and 56 of the waist circumference elastic member 23. Therefore, in the appearance of the diaper 1, the non-skin side sheet 22 is easily visible by floating, and when the waist circumference elastic member 23 is contracted, irregular large vertical wrinkles are likely to be formed. Therefore, by providing the sheet joint portions 60 to 62 on the waist circumference portion 20, it is possible to suppress the floating of the non-skin side sheet 22 and improve the appearance of the diaper 1.

The sheet joint 60 shown in FIG. 8 extends longer in the width direction than in the vertical direction (longitudinal direction) of the diaper 1. Further, a portion for fixing the waist circumference elastic member 23 to the pair of sheets 21 and 22 (for example, the central fixing portion 52 of the second continuous elastic member 231b) and the sheet joint portion inside the end fixing portion 50 in the width direction. Reference numeral 60 denotes discontinuity, which is arranged at intervals in the vertical direction. That is, the sheet joint portion 60 is arranged so as not to intersect the waist circumference elastic member 23. Specifically, the sheet joint portion 60 shown in FIG. 8 extends continuously from one end edge to the other end edge of the waist circumference portion 20 and is arranged between all of the waist circumference expansion / contraction members 23 arranged in the vertical direction. ..

By providing the sheet joint portion 60 elongated in the width direction in the waist circumference portion 20 in this way, regular fine vertical wrinkles are likely to be formed when the waist circumference expansion / contraction member 23 contracts. Therefore, the appearance of the diaper 1 is improved, and the user can be given the impression that the waist circumference 20 has a good fit.

In addition, the sheet joint portion 60 regulates the vertical movement of the waist circumference elastic member 23. Therefore, it is easy to maintain the vertical distance between the waist circumference elastic members 23, and the elasticity can be imparted over a wide range of the waist circumference portion 20.

However, when the waist circumference portion 20 has the sheet joint portion 60, the flexibility of the waist circumference portion 20 is reduced as compared with the case where the waist circumference portion 20 does not have the seat joint portion 60. However, the sheet joint portion 60 is less likely to adhere to the wearer's skin than the waist circumference elastic member 23. Therefore, it is difficult for the user to feel the hardness of the adhesive or the like of the sheet joint portion 60 as compared with the hardness of the adhesive or the like for fixing the waist circumference elastic member 23 to the pair of sheets 21 and 22, and the waist circumference portion 20 is worn. It is possible to suppress a decrease in comfort.

Further, in the region R1 in which the absorbent core 11A exists in the width direction, the waist circumference portion 20 is unlikely to contract in the width direction due to the high rigidity of the absorbent core 11A in the width direction. Further, a second continuous expansion / contraction member 231b having a central fixing portion 52 is arranged in the waist circumference portion 20 (particularly, in FIG. 7, all the continuous expansion / contraction members 231 have the central fixing portions 52 and 57). Therefore, even if the sheet joint portion 61 is not arranged in the region R1, irregular large vertical wrinkles are less noticeable and less likely to be formed. Therefore, as shown in FIG. 9, the sheet joint portion 61 may be arranged outside the absorbent core 11A in the width direction. In this way, by shortening the length of the sheet joint 61 in the width direction as much as possible, the flexibility of the waist circumference 20 can be improved.

However, it is not limited to the sheet joints 60 and 61 shown in FIGS. 8 and 9. For example, the sheet joints 60 and 61 may be arranged intermittently in the width direction without extending continuously in the width direction. Further, in the case of the waist circumference portion 20 having the discontinuous telescopic member 232, the sheet joint portions 60 and 61 may not be arranged in the discontinuous portion of the discontinuous telescopic member 232. Further, the sheet joints 60 and 61 may be arranged only in a part between a plurality of the waist-surrounding elastic members 23 arranged in the vertical direction. Further, the sheet joint portions 60 and 61 may be arranged inside the locking portion 40 in the width direction, or may be arranged inside the end fixing portion 50 in the width direction.

Further, as shown in FIG. 7 of the second embodiment, when the end fixing portion 55 extends long in the width direction in the discontinuous portion of the discontinuous telescopic member 232, the non-skin side sheet 22 in the discontinuous portion The floating can be suppressed by the end fixing portion 55. On the other hand, as shown in FIG. 8, in the discontinuous portion of the discontinuous telescopic member 232, when the end fixing portions 55 are separated in the width direction, the non-skin side sheet is formed in the region between the end fixing portions 55. 22 becomes easy to float. Therefore, as shown in FIG. 8, it is preferable to arrange the sheet joint portion 60 at the discontinuous portion of the discontinuous telescopic member 232. By doing so, the floating of the non-skin side sheet 22 can be suppressed, and the appearance of the diaper 1 can be improved. However, the present invention is not limited to the above, and as shown in FIG. 9, the sheet joint portion 60 may not be arranged at the discontinuous portion of the discontinuous telescopic member 232.

Further, as shown in FIG. 10, the sheet joint portion 62 may be arranged so as to intersect with the waist circumference telescopic member 23 in the vertical direction. Specifically, in FIG. 10, a pair of sheet joints 62 are arranged at positions in the same width direction as both ends in the width direction of the absorbent core 11A and above the second continuous expansion / contraction member 231b. The sheet joint 62 has a rectangular shape that extends long in the vertical direction.

The sheet joint 62 regulates the vertical movement of the continuous telescopic member 231. Therefore, the distance between the continuously expanding / contracting members 231 in the vertical direction can be easily maintained, and the elasticity can be imparted over a wide range of the waist circumference portion 20.

Further, both ends of the waist circumference portion 20 in the width direction have relatively high rigidity in the vertical direction due to the end fixing portion 50 and the locking portion 40, and are not easily crushed in the vertical direction. In the case of FIG. 10, the central portion of the waist circumference portion 20 in the width direction is also made more rigid in the vertical direction by the sheet joint portion 62, and is less likely to be crushed in the vertical direction. Therefore, the shape of the waist circumference 20 (rectangular shape in this case) is easily maintained, and the waist circumference of the wearer can be firmly covered by the waist circumference 20.

=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be changed or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

In the above-described embodiment, the waist circumference 20 (30) is composed of a pair of flexible sheets 21 and 22 (31, 32) such as a non-woven fabric, but a plurality of holes are opened on the surfaces of the pair of sheets 21 and 22. 25 may be provided. FIG. 11 is a schematic perspective view showing an example of the sheets 21 and 22 having a plurality of openings 25. In the example of FIG. 11, the skin side sheet 21 is a perforated non-woven fabric in which a plurality of perforated holes 25 penetrating the front and back surfaces are provided at intervals. The plurality of openings 25 may be provided on the non-skin side sheet 22, or may be provided on both the skin side sheet 21 and the non-skin side sheet 22.

By providing a plurality of openings 25 in at least one of the pair of sheets 21 and 22, the air permeability of the sheets can be improved, and the waist circumference 20 can be prevented from getting stuffy when the diaper 1 is worn. On the other hand, such an opening 25 is usually formed by using a heated pin member (not shown) or the like, but at that time, the outer peripheral edge portion of the opening 25 is melted and solidified. , The opening 25 may become hard. In this case, the flexibility of the waist circumference portion 20 is impaired, and the feel of the waist circumference portion 20 deteriorates. Further, when the opening 25 is provided and the adhesive for fixing is applied to the entire area of the elastic member 23 around the waist, the basis weight of the adhesive is relative when the elastic member 23 around the waist contracts. There is a possibility that the adhesive feeling of the adhesive will be felt from all the elastic members 23 around the waist through the opening 25.

On the other hand, the waist circumference portion 20 is a non-fixed portion 51 in which the waist circumference elastic member 23 is not fixed to the waist circumference portion 20 in a region inside the pair of end fixing portions 50, 50 in the width direction. have. The region where the non-fixed portion 51 is provided and the region where the plurality of openings 25 are provided overlap each other. Since the waist circumference portion 20 has high flexibility in the region where the non-fixed portion 51 is provided, the influence of hardening of the outer peripheral edge portion of the opening 25 can be relatively reduced in the region. .. That is, the tactile sensation of the waist circumference 20 as a whole is unlikely to become hard. Further, in the non-fixed portion 51, since the adhesive is not applied to the elastic member 23 around the waist, it is possible to suppress the wearer from feeling the adhesive feeling of the adhesive through the opening 25. Therefore, it is possible to improve the flexibility and breathability of the waist circumference portion 20 without causing discomfort to the wearer.

1 Pants-type disposable diaper (absorbent article),
10 absorbent body, 11 absorber,
11A absorbent core, 11B core wrap sheet,
12 top sheet, 13 back sheet, 14 exterior sheet,
20 Ventral girth (girth), 30 Dorsal girth (girth),
21,31 Skin side sheet (sheet),
22, 32 Non-skin side sheet (sheet),
23,33 Elastic member around the waist,
231 continuous stretch member (stretch member), 232 discontinuous stretch member,
231a 1st continuous telescopic member (1st telescopic member),
231b Second continuous telescopic member (second telescopic member),
231c 3rd continuous telescopic member,
25 openings,
40 Locking part,
50, 55 end fixing part,
51, 53, 56 non-fixed part,
52, 54, 57 Central fixing part,
60 Sheet joints (1st sheet joints, 2nd sheet joints),
61 Sheet joints (first sheet joints, second sheet joints),
62 Sheet joint (second sheet joint),

Claims (15)

In the unfolded state, it has a width direction and a longitudinal direction.
An absorbent article having a pair of girths and an absorbent body with an absorbent core.
At least one of the pair of waist circumferences has a pair of seats and a plurality of stretchable members arranged between the pair of seats that stretch in the width direction.
Each of the elastic members is continuously arranged from one end to the other end of the waist circumference portion in the width direction, and both ends in the width direction are fixed to the pair of sheets. Has an end fixing part,
The plurality of elastic members include a first elastic member and a second elastic member.
The first telescopic member has a non-fixed portion that is not fixed to the pair of sheets inside the end fixed portion in the width direction.
The second telescopic member has a central fixing portion fixed to the pair of sheets over at least the entire region overlapping the absorbent core in the width direction, and the absorbent body in the longitudinal direction. An absorbent article characterized in that it is located in an area that overlaps with. The absorbent article according to claim 1.
The plurality of elastic members are absorbent articles characterized by having a plurality of the second elastic members. The absorbent article according to claim 1 or 2.
The plurality of elastic members are absorbent articles characterized by having a plurality of the first elastic members. The absorbent article according to any one of claims 1 to 3.
An absorbent article characterized in that at least one second telescopic member is arranged in a region overlapping the absorbent core in the longitudinal direction. The absorbent article according to any one of claims 1 to 4.
The absorbent article, wherein the at least one second telescopic member has a non-fixed portion that is not fixed to the pair of sheets between the end-fixed portion and the central fixed portion in the width direction. .. The absorbent article according to any one of claims 1 to 5.
The central fixing portion of at least one second telescopic member is continuously arranged from the end fixing portion on one side in the width direction to the end fixing portion on the other side. Absorbent article. The absorbent article according to any one of claims 1 to 6.
An absorbent article characterized in that the non-fixed portion of at least one first telescopic member is arranged over at least the entire region overlapping the absorbent core in the width direction. The absorbent article according to claim 5.
Among the plurality of elastic members, the elastic members other than the first elastic member are the second elastic members.
All the first telescopic members have a central fixation portion fixed to the pair of sheets over at least the entire area overlapping the absorbent core in the width direction.
An absorbent article, wherein all the second telescopic members have the non-fixed portion. The absorbent article according to claim 8.
An absorbent article characterized in that all the first telescopic members and all the second telescopic members each have the same length in the width direction of the central fixing portion. The absorbent article according to any one of claims 1 to 9.
The length in the width direction of the region between the end fixing portion on one side in the width direction and the end fixing portion on the other side is wider than the length in the width direction of the absorbent body. A characteristic absorbent article. The absorbent article according to any one of claims 1 to 10.
The one waist circumference portion is a first sheet joint portion to which the pair of sheets are joined to each other inside the end portion fixing portion in the width direction, and is from the end portion fixing portion in the width direction. Also inside, an absorbent article characterized by not having a first sheet joint that is arranged without intersecting a portion that secures the telescopic member to the pair of sheets. The absorbent article according to any one of claims 1 to 10.
An absorbent article characterized in that one of the waist circumference portions has a second sheet joint portion in which the pair of sheets are joined to each other inside the end portion fixing portion in the width direction. The absorbent article according to claim 12.
The second sheet joint extends longer in the width direction than in the longitudinal direction, and is inside the end fixing portion in the width direction to fix the elastic member to the pair of sheets, and the longitudinal direction. Absorbent articles characterized by being spaced apart from each other. The absorbent article according to claim 12 or 13.
An absorbent article characterized in that the second sheet joint is arranged outside the absorbent core in the width direction. The pants-type absorbent article according to any one of claims 1 to 14.
At least one of the pair of sheets is provided with a plurality of holes penetrating the front and back at intervals.
A pants-type absorbent article characterized in that a region around the waist where the non-fixed portion is provided and a region where the opening is provided overlap each other.

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