JP7025496B1 - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of suppressing excessive adhesion to a wearer's skin while maintaining a fit for a leak-proof cuff. A leak-proof cuff 3 in an absorbent article 1 has a bent portion 35 located between a base end portion 31 and a free end portion 32 and extending in the vertical direction X. Each leak-proof cuff 3 is divided into a lower portion 3A and an outward overhanging portion 3B located between the first bent portion 35 and the free end portion 32. The outer overhanging portion 3B has a plurality of elastic members 37. In the natural state, the lateral width of the outer overhanging portion 3B in the front region F and the rear region R is smaller than the lateral width in the central region C. In each of the front region F and the rear region R, in the region where each elastic member 37 of the outer overhanging portion 3B has the fixing portion 90, all the elastic members 37 arranged in the outer overhanging portion 3B are spaced apart in the lateral direction Y. [Selection diagram] Fig. 1

Description

The present invention relates to an absorbent article.

From the viewpoint of suppressing the leakage of excrement such as urine to the outside, it is known to provide a pair of leak-proof cuffs on the side of an absorbent article such as a disposable diaper.
As an absorbent article having a leak-proof cuff, for example, Patent Document 1 includes a leak-proof side wall in which a side wall sheet is folded in half at a free end and an elastic material forming a shrinkage action line is arranged in a curved shape. Absorbent articles are listed.

Applicants have previously provided a three-dimensional guard having an elastic member and a skin contact portion formed by folding the side portion on the free end side toward the outside of the absorbent article, and the elastic member is provided with the elastic member. We have proposed an absorbent article that is disposed and fixed to the skin contact portion and the upright portion, respectively (Patent Document 2).

Further, in the applicant, the first elastic member is first arranged along the free end, and the fixed end is formed on the surface of the absorbent body on the skin contact surface side, and the ventral side and the dorsal side. We have proposed a disposable diaper equipped with a leak-proof cuff that is bent at two bent portions between the free end and the fixed end of each portion (Patent Document 3). In this leak-proof cuff, a second elastic member is arranged so as to extend between the ventral portion and the dorsal portion at the first bent portion from the free end to the fixed end.

Further, in Patent Document 4, the lateral distance between the longitudinal elastic elements in the side barrier is narrowed in the direction toward the front portion so as to be larger in the rear portion than in the front portion, and the side barrier is narrowed. Describes an absorbent article, which, when in contact with and fixed to the anterior portion, has a substantially Z-shaped cross-sectional folded structure.

Japanese Unexamined Patent Publication No. 2001-252308 Japanese Unexamined Patent Publication No. 2001-137582 Japanese Unexamined Patent Publication No. 2005-198802 Special Table 2006-520250

The leak-proof cuff is placed in and around the wearer's inseam when worn. From the viewpoint of preventing lateral leakage of excrement such as urine, it is desirable that the leak-proof cuff is sufficiently in close contact with the wearer's body. However, if the leak-proof cuff is excessively in close contact with the wearer's body, there is a risk that traces of the leak-proof cuff may remain on the wearer's skin, and stuffiness or skin irritation may occur. Patent Documents 1 to 4 do not disclose a technique for preventing the leakage-proof cuff from being excessively adhered.

Therefore, the present invention relates to an absorbent article that can suppress excessive adhesion to the wearer's skin while maintaining fit.

The present invention has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and has a central region arranged in the crotch portion of the wearer and an anterior extension extending to the front and back of the central region. The present invention relates to an absorbent article having a region and a rear region and having a pair of vertically extending leak-proof cuffs provided on a skin-facing surface.
Each of the leak-proof cuffs has a base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. It is preferable to have it.
Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. It is preferable to divide it into an overhanging portion.
It is preferable that the outward overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state.
In the natural state, it is preferable that the width of the outward overhanging portion along the lateral direction in the front region and the rear region is smaller than the width along the lateral direction in the central region.
Each of the elastic members has a fixing portion in which at least a part in the vertical direction is fixed to the outer overhanging portion in each of the front region and the rear region, and each of the elastic members of the outer overhanging portion has. In the region having the fixed portion, it is preferable that all the elastic members arranged on the outward overhanging portion are arranged at intervals in the lateral direction and in parallel with each other.

INDUSTRIAL APPLICABILITY According to the present invention, there is provided an absorbent article capable of suppressing excessive adhesion of a leak-proof cuff to the wearer's skin while maintaining a fit.

FIG. 1 is a plan view showing a disposable diaper according to an embodiment of the absorbent article of the present invention, and is a plan view of the diaper under a state in which the elastic members of each part are stretched and expanded to the design dimensions. be. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is an enlarged cross-sectional view taken along the lateral direction of the outward overhanging portion shown in FIG. FIG. 5 is a plan view from the central region to the rear region of the outward overhanging portion shown in FIG. FIG. 6 is an enlarged cross-sectional view showing another embodiment of the leakage-proof cuff according to the present invention. FIG. 7 is an enlarged cross-sectional view showing still another embodiment of the leakage-proof cuff according to the present invention. FIG. 8 is an enlarged cross-sectional view showing still another embodiment of the leakage-proof cuff according to the present invention. FIG. 9 is an enlarged cross-sectional view showing still another embodiment of the leakage-proof cuff according to the present invention. FIG. 10 is a schematic view in a plan view in the design dimensions of the outward overhanging portion of the leak-proof cuff.

Hereinafter, the present invention will be described based on the preferred embodiment thereof with reference to the drawings. 1 to 3 show a deployable disposable diaper (hereinafter, also simply referred to as a "diaper"), which is a preferred embodiment of the absorbent article of the present invention.

The diaper 1 schematically shown in FIG. 1 corresponds to the front-back direction of the wearer, and has a vertical direction X extending from the ventral side of the wearer to the dorsal side via the crotch portion and a lateral direction Y orthogonal to the vertical direction X. Have. The central region C in the vertical direction X is configured to include an excretion portion facing portion (not shown) which is arranged to face the excretion portion of the wearer when the diaper 1 is worn. The central region C in the vertical direction X is a front region F arranged on the ventral side of the wearer's ventral portion when worn, and a posterior region R arranged on the dorsal side of the excretory portion facing portion when worn. It is located between and. That is, the diaper 1 has a central region C arranged in the crotch portion of the wearer, and an anterior region F and a posterior region R extending in front of and behind the central region C. Each area extends continuously in the anterior-posterior direction of the wearer.

In FIG. 1, the diaper 1 is shown in a state in which the elastic member of each part is extended and expanded to the design dimension (the same as the dimension when the elastic member is unfolded in a plane state without any influence of the elastic member). .. FIG. 1 is a plan view showing the skin facing surface side of the diaper.
In the present specification, the "skin facing surface" is the surface facing the wearer's skin when wearing the diaper when focusing on the diaper or its constituent members, and the "non-skin facing surface" is the surface facing the wearer's skin when wearing the diaper. The surface facing away from the wearer's skin. That is, the skin-facing surface is the surface relatively close to the wearer's skin, and the non-skin-facing surface is the surface relatively far from the wearer's skin. "When worn" and "wearing state" refer to a state in which the proper wearing position of the diaper is maintained and worn.

2 and 3 are schematic views of a cross section of the diaper 1 shown in FIG. 1 along the lateral direction Y. Specifically, FIG. 2 is a schematic view of a cross section along the horizontal direction Y in the central region C of the vertical direction X, and FIG. 3 is a schematic view of a cross section along the horizontal direction Y in the rear region R of the vertical direction X. Is.
In FIG. 3, for convenience of explanation, a cross section along the lateral direction Y in the rear region R of the diaper 1 is described as an example, but the front region F of the diaper 1 in the present embodiment is referred to as the rear region R of the diaper 1. It has a similar configuration. Therefore, the description regarding the rear region R of the diaper 1 is appropriately applied to the front region F of the diaper 1 unless otherwise specified.

As shown in FIGS. 2 and 3, the diaper 1 includes an absorbent body 2. The absorbent main body 2 is interposed between the front surface sheet 21 arranged on the skin facing surface side, the back surface sheet 22 arranged on the non-skin facing surface side, and the front surface sheet 21 and the back surface sheet 22. It has a body 23. The front surface sheet 21, the back surface sheet 22, and the absorber 23 are configured by integrating them with a known joining means such as an adhesive. The absorber 23 is configured to include a liquid-retaining absorbent core 24 containing a water-absorbent material and a core wrap sheet 25 covering the outer surface of the absorbent core 24. The absorber 23 of the present embodiment has a rectangular shape in a plan view, and the longitudinal direction thereof and the vertical direction X in the diaper 1 are arranged so as to coincide with each other.
Further, the diaper 1 includes an outer layer sheet 26 arranged on the non-skin facing surface side of the absorbent main body 2. The outer layer sheet 26 forms a non-skin facing surface of the diaper 1 (see FIGS. 2 and 3).

As the front surface sheet 21, the back surface sheet 22, and the absorber 23, various types conventionally used for this kind of absorbent article can be used without particular limitation. As the surface sheet 21, for example, a non-woven fabric having a single-layer or multi-layer structure or a perforated film having liquid permeability can be used. As the back surface sheet 22, a sheet having liquid impermeability or poor liquid permeability can be used, and for example, a moisture-permeable resin film or a laminate of a resin film and a non-woven fabric can be used. Examples of the absorbent core 24 constituting the absorbent body 23 include a fiber stack made by stacking water-absorbent materials such as wood pulp and a water-absorbent polymer, and a sheet-shaped absorbent structure containing the water-absorbent material. Can be used. As the core wrap sheet 25 constituting the absorber 23, a sheet having liquid permeability can be used, and for example, paper or non-woven fabric can be used.

The surface sheet 21 of the present embodiment has an uneven structure composed of a plurality of concave portions and convex portions on the surface facing the skin. The form of the sheet having the uneven structure is a composite sheet in which the laminated first sheet and the second sheet are joined to each other at a plurality of joints, and the first sheet is a second sheet at a portion other than the joint. Examples thereof include those protruding in the direction away from the surface to form a convex portion. Each of the first and second sheets is preferably made of a fiber sheet, and the fiber sheet is preferably a non-woven fabric, a woven fabric, a knitted fabric, a paper machine, or a laminate thereof. Such a composite sheet can be manufactured by the same method as that described in, for example, Japanese Patent Application Laid-Open No. 2015-11234.
The surface sheet 21 may be a flat sheet having no uneven structure.

The diaper 1 shown in FIGS. 1 to 3 is provided with a pair of leakage-proof cuffs 3 and 3 arranged apart from each other in the lateral direction Y on the skin-facing surface thereof. Each of the leak-proof cuffs 3 is arranged so as to extend in the vertical direction X. The leak-proof cuff 3 includes at least a plurality of cuff elastic members 37 extending in the vertical direction X, and preferably includes a cuff-forming sheet 30 which is a sheet material for forming the leak-proof cuff. The cuff forming sheet 30 is made of a non-stretchable sheet material such as a non-woven fabric.

The diaper 1 of the present embodiment includes a pair of side flap portions 4 and 4 extending outward in the lateral direction Y from both side edges of the absorber 23 along the vertical direction X. In the embodiment shown in FIG. 2, the front surface sheet 21 covers the entire surface of the absorber 23 facing the skin, and the back surface sheet 22 covers the entire non-skin facing surface of the absorber 23. Further, the outer layer sheet 26 covers the entire non-skin facing surface of the back surface sheet 22. The back surface sheet 22 and the outer layer sheet 26 extend outward in the lateral direction Y from both side edges of the absorber 23 along the vertical direction X, and form the side flap portion 4 together with the cuff forming sheet 30. That is, the side flap portion 4 is located laterally outward of the absorber 23 and is located at a portion where the absorber 23 is not arranged, and includes the back surface sheet 22, the outer layer sheet 26, and the cuff forming sheet 30. Has been done. These plurality of members constituting the side flap portion 4 are joined to each other by an adhesive and known joining means such as heat seal and ultrasonic seal.

A plurality of leg elastic members 42 are arranged in an extended state along the vertical direction X on each of both side portions of the side flap portion 4 of the diaper 1 along the vertical direction X. Leg gathers can be formed by the contraction of the leg elastic member 42. The leg elastic members 42 are arranged at least in the central region in the vertical direction at intervals in the horizontal direction Y.

As shown in FIG. 1, in the diaper 1 of the present embodiment, a pair of fastening tapes 7 and 7 are provided on both side edges of the rear region R along the vertical direction X. Specifically, each fastening tape 7 is arranged so as to extend from both side edges in the lateral direction Y in the side flap portion 4 located in the rear region R. One end of each fastening tape 7 is fixed between the back surface sheet 22 and the cuff forming sheet 30.

As shown in FIG. 1, a landing tape (not shown) is provided on the non-skin facing surface of the front region F of the diaper 1 as a fastening region to which the fastening portion 71 provided on the fastening tape 7 can be detachably fastened. ) Is provided. As the landing tape, an appropriate material is selected according to the material of the fastening portion 71 included in the fastening tape 7. For example, when the fastening portion 71 is a male material of a mechanical fastener, a fiber sheet that can be engaged with the male material, for example, a knitted fabric or a non-woven fabric, can be used as the female material of the mechanical fastener as the landing tape. When the fastening portion 71 is an adhesive, for example, a smooth film made of synthetic resin can be used as the landing tape.

As described above, the diaper of the present invention includes a pair of leakage-proof cuffs 3, 3. Each leak-proof cuff 3 is preferably configured to include a cuff forming sheet 30. Each cuff forming sheet 30 is arranged so as to straddle the side edges of the absorber 23 in the lateral direction Y. Details of the constituent materials of the leak-proof cuff 3 and the cuff forming sheet 30 will be described later.

As shown in FIGS. 2 and 3, the cuff-forming sheet 30 includes a base end portion 31 extending in the vertical direction X over substantially the entire length of the sheet 30 in the vertical direction X, and a free end portion 32. The base end portion 31 is a fixing portion fixed to a member other than the cuff forming sheet 30. The free end portion 32 is a non-fixed portion with a member other than the cuff forming sheet 30. The leak-proof cuff 3 can stand on the skin side of the wearer with the innermost position in the lateral direction Y at the base end portion 31 as the standing end.
In the present specification, the entire area X in the vertical direction means a region including all of the front region F, the central region C, and the rear region R, and is a concept different from the “total length” indicating the length of the vertical direction X. Both the base end portion 31 and the free end portion 32 are preferably arranged at least in the central region C, and may be arranged over the entire length of the vertical direction X. The other member described above is typically a member arranged so as to be in contact with the sheet 30 on the non-skin facing surface side of the cuff forming sheet 30, and the other member in the present embodiment is a surface sheet 21. be.

Since the diaper shown in FIG. 2 is in a state where the elastic members of each part are stretched to the design dimensions as described above, the leakage-proof cuff 3 is not normally in an upright state, but for convenience of explanation, the figure is shown. The leak-proof cuff 3 in No. 2 is shown in an upright position. In the natural state of the leak-proof cuff 3, at least the portion located in the central region C stands up toward the wearer's skin.
As used herein, the "natural state" of a diaper means a state in which no external force is applied to the diaper (relaxed state). In the natural state, for example, the length of the elastic member arranged on the leak-proof cuff in the vertical direction X is the shortest.

The base end portion 31 is typically formed by an adhesive such as hot melt or a known bonding means such as heat fusion. As shown in FIGS. 2 and 3, the base end portion 31 is located outside the lateral direction Y with respect to the side edge of the absorber 23 along the vertical direction X.

As shown in FIGS. 2 and 3, each leakage-proof cuff 3, 3 has a bent portion 35 located between the base end portion 31 and the free end portion 32. The bent portion 35 can be positioned at substantially the center of each of the leakage-proof cuffs 3 and 3 in the lateral direction Y, for example. Alternatively, the bent portion 35 can be positioned so as to be offset from the lateral center of the leak-proof cuff 3 toward the free end portion 32, and conversely, be offset from the lateral center of the leak-proof cuff 3 toward the base end portion 31. It can also be positioned. Such a positional relationship is based on the position when the leakage-proof cuff 3 is extended to the maximum in the lateral direction Y.
The bent portion 35 extends in the vertical direction X, and in the present embodiment, the cuff forming sheet 30 is formed by being bent outward in the lateral direction Y between the base end portion 31 and the free end portion 32. By forming the bent portion 35, each of the leakage-proof cuffs 3 and 3 is located between the lower portion 3A located between the base end portion 31 and the bent portion 35, and between the bent portion 35 and the free end portion 32. It is divided into an outer overhanging portion 3B located at. The outer overhanging portion 3B projects laterally Y outward from the position of the bent portion 35, and is formed over the entire vertical direction X of the leakage-proof cuff 3. That is, the bent portion 35 forms an end portion on the lateral Y inner side of the outward overhanging portion 3B. Hereinafter, the bent portion 35 is also referred to as a “first bent portion 35”.

The outward overhanging portion 3B in the present embodiment has a two-layer structure in which one continuous cuff forming sheet 30 is bent in the lateral direction Y to form two facing surfaces. One surface of the outward overhanging portion 3B formed by bending the cuff forming sheet 30 forms a contact surface that comes into contact with the wearer's skin.

The leak-proof cuff 3 has, in addition to the cuff forming sheet 30, a plurality of elastic members 37 extending in the vertical direction X and arranged in an extended state. Specifically, a plurality of thread-shaped or strip-shaped elastic members 37 are arranged on the outer overhanging portion 3B of the leak-proof cuff 3. Hereinafter, such an elastic member 37 is referred to as a “cuff elastic member 37”. A plurality of cuff elastic members 37 are arranged side by side in the horizontal direction Y in a state of being expandable and contractible in the vertical direction X. The cuff elastic member 37 is arranged at least in the central region C of the diaper 1. In the present embodiment, the cuff elastic member 37 extends to the front region F and the rear region R in the vertical direction X together with the central region C.

In the natural state of the diaper 1, the width of the outer overhanging portion 3B of the leak-proof cuff 3 along the lateral direction Y is different between the central region C in the vertical direction X and the other regions in the vertical direction X. Specifically, the outer overhanging portion 3B has a width along the lateral direction Y in the front region F and the rear region R of the diaper 1 smaller than the width along the lateral direction Y in the central region C. In such a form, when the diaper 1 is viewed along the vertical direction X from the front region F or the rear region R toward the central region C, the width of the outer overhanging portion 3B along the lateral direction Y continuously increases. It may be, or it may be gradually increased.

In the leak-proof cuff 3, each cuff elastic member 37 has a fixing portion 90 in each of the front region F and the rear region R, in which at least a part of the vertical direction X is fixed to the outward overhanging portion 3B. That is, the cuff elastic member 37 is joined to the cuff forming sheet 30 via the fixing portion 90.
It is preferable that the fixed portion 90 extends in the vertical direction X and is formed intermittently at a distance in the horizontal direction Y. In the form shown in FIG. 4, the fixing portion 90 is formed at a position overlapping the position where the cuff elastic member 37 is arranged in the thickness direction, and is not formed at a position where the cuff elastic member 37 is not arranged. .. The fixing portion 90 is typically formed of an adhesive. It is preferable that the fixing portion 90 is formed over the entire position corresponding to the arrangement position of the cuff elastic member 37 in the vertical direction X.

In the outward overhanging portion 3B of the present embodiment, in the region where each cuff elastic member 37 has the fixing portion 90, all the cuff elastic members 37 arranged in the outward overhanging portion 3B are spaced apart from each other in the lateral direction Y. Moreover, they are arranged in parallel with each other. The "parallel state" means that the inclination angle between the cuff elastic members 37 extending in the vertical direction X is within 2 °, preferably within 1 °. Further, the region where each cuff elastic member 37 has the fixing portion 90 in the outer overhanging portion 3B is hereinafter also referred to as a “parallel fixing region”. In order to confirm whether or not the outer overhanging portion 3B has a parallel fixed region in each of the front region F and the rear region R, the leak-proof cuff 3 is confirmed with the design dimensions as shown in FIG. do.

In the diaper 1 of the present embodiment, since the outer overhanging portion is formed on the leak-proof cuff, the outer overhanging portion 3B and the wearer's skin are brought into surface contact with each other, and the outer overhanging portion is brought into surface contact with the wearer over the entire area in the front-rear direction. The fit of the diaper 1 can be improved.
In addition to this, since the outer overhanging portion 3B has a parallel fixed region at least in one of the front region F and the rear region R, it is easy to maintain the distance between the cuff elastic members 37 in the lateral direction Y. Due to this, the leak-proof cuff can be uniformly fitted to the wearer's body along the wearer's anterior-posterior direction corresponding to the vertical direction X, and the excrement can be laterally located at any part of the wearer's anterior-posterior direction. It is possible to prevent leakage (lateral leakage) to the outside of the direction.
Further, the outer overhanging portion 3B of the leakage-proof cuff is worn because the width along the lateral direction Y in the front region F and the rear region R is smaller than the width along the lateral direction Y in the central region C. It is possible to prevent the leakage-proof cuff 3 and the wearer's skin from being excessively adhered to the abdomen and back of the person. As a result, it becomes difficult for the leak-proof cuff 3 to leave a trace of contact with the skin, and steam on the abdomen and dorsal side, which are prone to sweat, can be released to the outside of the diaper, so that skin troubles such as rash due to stuffiness can be suppressed. ..

Further, when the diaper 1 has a waist opening WH through which the wearer's torso is passed and a pair of leg openings LH through which the wearer's lower limbs are passed, the fastening tapes 7 and 7 are used. The operation of pulling in the lateral direction Y to attach to the landing tape in the front region F is performed. At this time, a force that pulls outward in the lateral direction Y is applied to the outward overhanging portion 3B of the leak-proof cuff 3. In the present embodiment, the width of the leak-proof cuff 3 located in the front region F and the rear region R is smaller than that in the inseam region C, so that the inseam region C is leak-proof during the fastening operation. Deformation such as the outer overhanging portion 3B of the cuff 3 falling down is difficult. The reason for this is that the outer overhanging portion 3B having a smaller width in the rear region R can be easily expanded outward in the lateral direction Y, so that the uprightness of the leakage-proof cuff 3 in the rear region R is improved. As a result, the leakage resistance is further improved. Moreover, since the tensile force is slightly transmitted to the outward overhanging portion 3B in the inseam region C, the erectability of the leak-proof cuff in the inseam region C can be improved, and the leak-proof property can also be improved. In particular, when one end of each fastening tape 7 is fixed between the back surface sheet 22 and the cuff forming sheet 30, the tensile force is easily transmitted to the outward overhanging portion 3B, so that the effect of leakage prevention can be achieved. Can be enhanced.

From the viewpoint of more reliably achieving the above effect, the length (width) of the outer overhanging portion 3B of the diaper 1 in the natural state along the lateral direction Y is preferably within the following range.
In the natural state of the diaper, the length W1 (see FIG. 2) along the lateral direction Y of the outward overhanging portion 3B in the central region C is preferably 5 mm or more, more preferably 10 mm or more, preferably 25 mm or less, and further. It is preferably 20 mm or less. The length W1 may be the same or different over the entire central region C, provided that the above range is satisfied. The length W1 is the length when the outer overhanging portion 3B of the leak-proof cuff 3 is projected in a plane in the natural state of the diaper. Here, the plane projection means that when the plane formed by the outward overhanging portion 3B is parallel to the plane (the plane on which the diaper is placed) in the natural state of the diaper, it is literally projected onto the plane. If the surface formed by the outer overhanging portion 3B is not parallel to the plane (the diaper mounting surface) in the natural state of the diaper, project from the normal direction of the surface formed by the outer overhanging portion 3B. To say.

Further, the length W2 (see FIG. 3) along the lateral direction Y of the outer overhanging portion 3B in the front region F and the rear region R is independently and preferably 4 mm, provided that they are smaller than the length W1. As mentioned above, it is more preferably 9 mm or more, preferably 24 mm or less, still more preferably 19 mm or less. The length W2 may be the same in the entire front region F and the rear region R, or may be different, provided that the above range is satisfied. Similar to the length W1, the length W2 is the length when the surface formed by the outward overhanging portion 3B is projected in a plane in the natural state of the diaper.

In the natural state of the diaper, the width of the outer overhanging portion 3B along the lateral direction Y differs between the central region C in the vertical direction X and the other regions F and R in the vertical direction X, for example, FIG. Alternatively, as shown in FIG. 8, in each of the front region F and the rear region R in the vertical direction X, the bent portions 51 and 53 extending in the vertical direction X different from the first bent portion 35 are the free end portions 32 and the first bent portion. One or two or more are further formed between 35 and 35, and the bent portions 51 and 53 different from the first bent portion 35 are not formed in the central region C in the vertical direction X.

As shown in FIG. 3, the outward overhanging portion 3B of the present embodiment has a second bending extending in the vertical direction X between the free end portion 32 and the first bending portion 35 in the front region F and the rear region R. It has a part 51. With such a configuration, the width of the outer overhanging portion 3B along the lateral direction Y in the front region F and the rear region R can be easily made smaller than the width along the lateral direction Y in the central region C. In the present embodiment, the second bent portion 51 forms an end portion on the lateral Y outer side of the outer overhanging portion 3B. Hereinafter, the portion 3S located between the free end portion 32 and the second bent portion 51 in the outer overhanging portion 3B is also referred to as an “outer region”.

The outer region 3S in the present embodiment includes a free end portion 32 in the outer overhanging portion 3B and a cuff elastic member 37 arranged closest to the free end portion 32. The second bent portion 51 forming the outer region 3S is located closer to the free end portion 32 with respect to the lateral central portion of the leak-proof cuff 3. The second bent portion 51 is formed by bending a cuff forming sheet 30 located between the free end portion 32 and the cuff elastic member 37 arranged on the outermost side in the lateral direction Y.
In the natural state of the outward overhanging portion 3B in the present embodiment, the outer region 3S is folded back in the lateral direction Y inward. The above-mentioned "folded inward in the lateral direction Y" means that the outer region 3S is folded toward the skin facing surface side and the outer region 3S is folded toward the non-skin facing surface side. It means to include both the case of being folded back and the case of being folded back. In particular, when the outer region 3S is folded back toward the skin facing surface side, the second bent portion 51 can function as a flexible shaft, so that the wearer's skin does not come into contact with the skin too strongly and the feel becomes soft. It is preferable in that the cushioning property is further improved.
In each of the front region F and the rear region R of the present embodiment, the outer region 3S is folded back toward the skin facing surface side. On the other hand, in the central region C of the present embodiment, the outer region 3S is not formed. In the central region C, the outer region 3S may be formed on condition that the relationship of the widths of the outer overhanging portion 3B along the lateral direction Y is satisfied.

From the viewpoint of making the second bent portion 51 more function as a flexible shaft and further improving the cushioning property of the outer region 3S, the outer overhanging portion 3B in the front region F and the rear region R is directed inward in the lateral direction Y. It is preferable that the outer region 3S folded back and the portion facing the outer region 3S are not joined. In the present embodiment, the folded outer region 3S faces the portion between the second bent portion 51 and the first bent portion 35, but is not joined to the portion.

As shown in FIG. 5, in the outward overhanging portion 3B of the present embodiment, the second bent portion 51 extends linearly in a plan view, and the second bent portion 51 is inclined with respect to the vertical direction X. There is. More specifically, the second bent portion 51 extends diagonally from the outside to the inside in the lateral direction Y. Due to the second bent portion 51, the width of the outward overhanging portion 3B of the present embodiment gradually decreases from the central region C toward the rear region R along the lateral direction Y. Similarly, the width of the outward overhanging portion 3B gradually decreases along the lateral direction Y from the central region C toward the front region F (not shown). That is, the width of the outer region 3S gradually increases along the lateral direction Y from the central region C toward the rear region R and from the central region C toward the front region F.
Instead of this, the second bent portion 51 may extend parallel to and linearly in the vertical direction X.

The outward overhanging portion 3B of the present embodiment is folded back with the second bent portion 51 extending diagonally with respect to the vertical direction X as a bending point, and is located at the outermost side in the horizontal direction Y from the middle of the vertical direction X. The portion including the cuff elastic member 37 is folded back (see FIG. 5). That is, in the outer region 3S, the cuff elastic member 37 is folded back inward in the lateral direction Y together with the sheet forming the outer region 3S. In this way, when the portion including the rigid cuff elastic member 37 is folded back, the outer overhanging portion 3B in the central region C is maintained wider than the outer overhanging portion 3B in the front region F and the rear region R. It will be easier to do.
The number of cuff elastic members 37 that are folded back inward in the lateral direction Y together with the sheet forming the outer region 3S is not particularly limited, but is preferably 1 or more and 3 or less, and more preferably 1 or more and 2 or more. It is as follows.

Each of the front area F and the rear area R of the diaper 1 has a length along the lateral direction Y of the outer area 3S with respect to the length of the design dimension along the lateral direction Y of the outer overhanging portion 3B including the outer area 3S. (That is, the length of the design dimension along the lateral direction Y from the second bent portion 51 to the free end portion 32) is preferably 1% or more, more preferably 2% or more, and preferably 100%. The following is preferable, and more preferably 50% or less. With such a range, the leak-proof cuff (outer region 3S) can be brought into contact with the wearer's abdomen and dorsal side more softly, and the cushioning property can be further improved.

Regarding the leak-proof cuff 3, a plurality of cuff elastic members arranged on the outer overhanging portion 3B of the leak-proof cuff 3 from the viewpoint of further suppressing excessive adhesion to the wearer's skin while maintaining the fit. For 37, it is preferable to use at least two types of cuff elastic members 37 having different elongation stresses. In this case, in the outward overhanging portion 3B, the elongation stress of the cuff elastic member 37 located inward in the lateral direction Y is higher than the elongation stress of the cuff elastic member 37 located outside in the lateral direction Y. More preferred. The arrangement position of the cuff elastic member 37 is based on the position when the outer overhanging portion 3B is extended to the maximum in the lateral direction Y. By using such a cuff elastic member 37, when the diaper is worn, the bent portions other than the first bent portion 35 such as the second bent portion are easily formed in the front region F and the rear region R of the leakage-proof cuff 3. At the same time, it is possible to soften the contact of the lateral Y outer side portion of the outer overhanging portion 3B with the skin.

From the viewpoint of satisfying the above-mentioned magnitude relationship with respect to the extension stress of the cuff elastic member 37, for example, the extension ratio of the cuff elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is the lateral direction of the outer overhanging portion 3B. It is preferable to arrange these cuff elastic members 37 so as to be higher than the elongation ratio of the cuff elastic members 37 located on the outer side of Y. When three or more cuff elastic members 37 are arranged, the extension ratio of each cuff elastic member 37 may be gradually increased from the lateral Y outward to the inward of the outward overhanging portion 3B. .. Alternatively, the extension ratio of the cuff elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B may be the highest, and the extension ratio of the other cuff elastic members 37 may be the same.

The elongation ratio of each cuff elastic member 37 can be measured by, for example, the following method. First, each cuff elastic member 37 arranged on the outward overhanging portion 3B of the leak-proof cuff 3 is taken out, and the cuff elastic member 37 is extended to the maximum in the longitudinal direction, and an oil-based pen is attached to the cuff elastic member 37. Two marks are made by using L1 at regular intervals in the expansion / contraction direction. Next, the length L2 of the marked cuff elastic member 37 is measured in a non-extended state. This measurement is performed three times for each cuff elastic member 37, and the elongation ratio (times) is obtained from the arithmetic mean value of the values calculated by the formula represented by "L1 / L2". The interval L1 can be, for example, 100 mm.

The extension ratio of the cuff elastic member 37 measured by the above-mentioned measuring method is such that the extension ratio of the cuff elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is outside the lateral Y of the outer overhanging portion 3B. On condition that the cuff elastic member 37 located on the side is arranged so as to be higher than the elongation ratio, it is preferably 1.5 times or more, more preferably 2.0 times or more, and preferably 2.0 times or more, independently of each other. Is 3.5 times or less, more preferably 3.0 times or less.

From the viewpoint of satisfying the above-mentioned magnitude relationship with respect to the elongation stress of the cuff elastic member 37, for example, the thickness of the cuff elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is the lateral direction of the outer overhanging portion 3B. It is also preferable to arrange these cuff elastic members 37 so as to be larger than the thickness of the cuff elastic members 37 located on the outer side of Y. When three or more cuff elastic members 37 are arranged, the thickness of each cuff elastic member 37 may be gradually increased from the lateral Y outward to the inward of the outer overhanging portion 3B. .. Alternatively, the cuff elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B may have the largest thickness, and the other cuff elastic members 37 may have the same thickness.

The thickness of each cuff elastic member 37 described above refers to the thickness of each elastic member in a non-extended state. When each cuff elastic member 37 is thread-shaped, each cuff elastic member 37 measures the diameter of the cross section of one cuff elastic member 37 at three different points, and represents the arithmetic mean value thereof. When each cuff elastic member 37 is strip-shaped, the thickness of each cuff elastic member 37 is measured at three different points for one cuff elastic member 37 by measuring the length orthogonal to the extension direction on the main surface of the elastic member. , The arithmetic mean value. When each cuff elastic member 37 is composed of a bundle of a plurality of elastic fibers, a sample obtained by cutting out the elastic member from the leakage-proof cuff to be measured to a certain length (example: 100 mm) is used as a sample. May be expressed as the thickness (fineness) of the elastic member by dividing the mass of the sample by the length of the sample.

The thickness D1 (see FIG. 10) of the cuff elastic member 37 measured by the above-mentioned measuring method in the non-extended state is the thickness of the cuff elastic member 37 located inward in the lateral direction Y of the outward overhanging portion 3B. Expressed in fineness, each independently, preferably 150 dtex or more, further, provided that they are arranged so as to be larger than the thickness of the cuff elastic member 37 located on the lateral Y outer side of the outer overhanging portion 3B. It is preferably 300 dtex or more, preferably 950 dtex or less, and more preferably 800 dtex or less.

From the viewpoint of satisfying the above-mentioned magnitude relationship with respect to the elongation stress of the cuff elastic member 37, for example, the elastic modulus of the constituent resin of the cuff elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is the elastic modulus of the outer overhanging portion 3B. It is also preferable to arrange these cuff elastic members 37 so as to have a higher elastic modulus than the elastic modulus of the constituent resin of the cuff elastic member 37 located outside Y in the lateral direction. When three or more cuff elastic members 37 are arranged, the elastic modulus of the constituent resin of each cuff elastic member 37 gradually increases from the lateral Y outward to the inward of the outward overhanging portion 3B. You may. Alternatively, even if the elastic modulus of the constituent resin of the cuff elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B is the largest and the elastic modulus of the constituent resin of the other cuff elastic member 37 is the same. good. The elastic modulus described above is based on the premise that the cuff elastic members 37 have the same thickness and the elongation ratios are the same.

Each leakage-proof cuff 3 of the present embodiment has a cuff fixing region 33 in which the lower portion 3A is fixed to the absorbent main body 2 in each of the front region F and the rear region R (not shown in FIG. 3). .. In the cuff fixing region 33, the lower portion 3A is fixed to the absorbent main body 10 by an adhesive or the like, so that the leak-proof cuff 3 does not stand up (see FIG. 3). The lower portion 3A of the leak-proof cuff 3 of the present embodiment is fixed to the surface sheet 21.
In the cuff fixing region 33, the entire lower portion 3A may be fixed to the absorbent main body 2, or a part of the lower portion 3A may be fixed to the absorbent main body 2.

In the diaper 1 of the present embodiment, as shown in FIG. 1, the end portion of the absorber 23 in the vertical direction X overlaps the cuff fixing region 33 and the vertical direction X. That is, the absorber 23 is arranged in the region where the leakage-proof cuff 3 does not stand up. With such a configuration, even if the excrement moves to the front region F or the rear region R side, it is absorbed by the absorber 23, so that leakage in the region where the leakage-proof cuff 3 does not stand can be effectively suppressed. ..

As shown in FIG. 1, the diaper 1 of the present embodiment has a dorsal expansion / contraction region 6 in which a plurality of elastic members 61, 62 extending in the lateral direction Y are arranged in an extended state in the rear region R. The dorsal stretchable region 6 is located in the rear region R where the wearer's dorsal waist is arranged, and is stretchable in the lateral direction Y. The dorsal expansion / contraction region 6 has a waist-side elastic member 61 arranged on the outer side in the vertical direction X from the absorber 23, and a lower elastic member 62 arranged at a position overlapping the absorber 23 in the vertical direction X. ing. In the dorsal expansion / contraction region 6, a plurality of elastic members 61, 62 extending in the lateral direction Y are intermittently arranged in the vertical direction X between the seat members arranged on the non-skin facing surface side of the absorber 23 in the rear region R. It can be formed by. In the present embodiment, the sheet members arranged on the non-skin facing surface side of the absorber 23 are the back surface sheet 22 and the outer layer sheet 26, and the waist side elastic member 61 and the lower elastic member 62 are placed between the back surface sheet 22 and 26. Is arranged.

When the end edge of the front region F is the front end and the end edge of the rear region R is the rear end in the vertical direction X, the end portion of the absorber in the vertical direction X in the rear region R is the most front end side in the dorsal elastic region 6. It is preferable that the elastic member 62 is located on the rear end side of the elastic member 62. As described above, by overlapping the end portion of the absorber 23 and the dorsal expansion / contraction region 6 in the vertical direction X, the fit and the leakage prevention effect in the rear region R can be further improved.
From the viewpoint of further improving the above effect, at least one of the plurality of elastic members in the dorsal telescopic region 6 is located on the rear end side of the end portion of the absorber 23 in the vertical direction X. preferable. That is, it is preferable that the dorsal expansion / contraction region 6 has one or more waist-side elastic members 61.
From the same viewpoint as above, the number of waist-side elastic members 61 in the dorsal expansion / contraction region 6 is preferably 5 or more and 20 or less, and more preferably 6 or more and 17 or less.

In the dorsal elastic region 6 of the present embodiment, the lower elastic members 62 are arranged on both sides of the absorber 23 in the lateral direction Y, and are not arranged in the portion overlapping the absorber 23 in a plan view. That is, the dorsal telescopic region 6 of the present embodiment does not have a portion that overlaps with the absorber 23 in a plan view, and has a shape recessed toward the rear end side so as not to overlap with the absorber 23. As described above, it is preferable that the dorsal expansion / contraction region 6 does not overlap with the central portion of the absorber 23 at least in the lateral direction Y in a plan view. With such a configuration, wrinkles due to the elastic member 61 on the waist side are less likely to occur in the absorber 23, so that the fit and the leak prevention effect in the rear region R can be further improved. The central portion of the absorber 23 in the lateral direction Y is the central region when the total length of the absorber 23 in the lateral direction Y is divided into three equal parts.

In the diaper 1 of the present embodiment, the fastening tape 7 and the dorsal elastic region 6 (elastic members 61, 62) that can be expanded and contracted in the horizontal direction Y overlap each other in the vertical direction X, and the dorsal side is the same in the vertical direction X. The stretchable region 6 (elastic members 61, 62) overlaps with the region where the leak-proof cuff 3 stands up. When the dorsal expansion / contraction region 6 contracts in the lateral direction Y in the natural state, the leakage-proof cuff 3 in the rear region R tends to be compactly organized. Further, in the wearing shape, since the dorsal expansion / contraction region 6 is extended in the lateral direction Y, the leakage-proof cuff 3 is pulled in the lateral direction Y and easily stands up. As a result, the leakage of excrement is further suppressed in the posterior region R, and the leakage-proof cuff 3 can be favorably erected in the inseam region C.

6-9 show other embodiments of the leak-proof cuff in the anterior region F and the posterior region F. With respect to these embodiments, components different from the embodiments shown in FIGS. 1 to 5 will be mainly described, and similar components will be designated by the same reference numerals and description thereof will be omitted. The description of the above-described embodiment is appropriately applied to the components not particularly described.

The leakage-proof cuff 3 shown in FIGS. 6 to 8 has a bent portion other than the first bent portion 35 between the free end portion 32 and the first bent portion 35 in the front region F and the rear region R. There is. As a result, in the natural state, the width of the outward overhanging portion 3B along the lateral direction Y in the front region F and the rear region R is smaller than the width along the lateral direction Y in the central region C. Further, in the embodiment shown in FIGS. 6 and 7, the second bent portion 50 extending in the vertical direction X is bent with the cuff elastic member 37 arranged closest to the free end portion 32 in the outward overhanging portion 3B. It is located between the cuff elastic member 37 arranged closest to the portion 35.
In the outer overhanging portion 3B in the above-described embodiment, the outer region 3S is folded inward in the lateral direction Y, but the outer region 3S shown in FIG. 6 is directed toward the wearer's body side. Standing up. In the leak-proof cuff 3 shown in FIG. 6, the second bent portion 51 is formed in the central portion in the lateral direction Y between the free end portion 32 and the first bent portion 35, but is between the cuff elastic members 37. As long as it is formed in, it may be located closer to the free end portion 32 with respect to the lateral central portion of the leak-proof cuff 3, and the first bent portion 35 with reference to the lateral central portion of the leak-proof cuff 3. It may be located closer. The forming position of the second bent portion 51 is based on the position when the outward overhanging portion 3B is extended to the maximum in the lateral direction Y.

Further, in the outer overhanging portion 3B in the front region F and the rear region R, if a plurality of elastic members 37 are configured to exist in the outer region 3S, the outer overhanging portion 3B hits the wearer's skin on the surface. It is preferable because it is easy to contact and the fit can be improved. In addition to this, if a plurality of elastic members 37 are configured to exist in the region along the lateral direction Y between the second bent portion 50 and the bent portion 35, the outer overhanging portion 3B hits the skin. It is preferable because the contact is more stable, the followability to the wearer's movement, and the fit to the wearer's skin are further enhanced. In such a configuration, for example, as described above, the extension stress of the elastic member 37 located inside the lateral direction Y of the outward overhanging portion 3B is applied to the extension stress of the elastic member 37 located outside the lateral direction Y, and the elastic member is located outside the lateral direction Y. This can be easily achieved by arranging a plurality of elastic members 37 so as to be higher than the elongation stress of the vertical direction X of 37.

The leak-proof cuff 3 shown in FIG. 7 has a second bent portion extending in the vertical direction X between the free end portion 32 and the first bent portion 35 in the outward overhanging portion 3B, separately from the first bent portion 35. It has a 51 and a third bent portion 53. The second bent portion 51 in the present embodiment is located closer to the free end portion 32 in the lateral direction Y of the outward overhanging portion 3B with respect to the lateral central portion of the leak-proof cuff 3. The third bent portion 53 is located closer to the first bent portion 35 of the outward overhanging portion 3B in the lateral direction Y with respect to the lateral central portion of the leak-proof cuff 3. That is, the second bent portion 51 is located outside the lateral direction Y with respect to the third bent portion 53. In the present embodiment, the second bent portion 51 is located at a substantially central portion between the free end portion 32 and the first bent portion 35 in the outward overhanging portion 3B, and the third bent portion 53 is the second. It is located at a substantially central portion between the bent portion 51 and the first bent portion 35. The forming position of the second bent portion 51 and the third bent portion 53 is based on the position when the outer overhanging portion 3B is extended to the maximum in the lateral direction Y.

When the second bent portion 51 and the third bent portion 53 are formed on the outer overhanging portion 3B, as shown in FIG. 7, the outer overhanging portion 3B has the first bent portion 35 and the first bent portion 35 in the central region C. The inner region 3T located between the two bent portions 51 is formed so as to be folded inward in the lateral direction Y. In addition to this, in the outer overhanging portion 3B, the outer region 3S located between the second bent portion 51 and the free end portion 32 is folded back toward the lateral Y outward. Both the portion 51 and the third bent portion 53 are formed by bending the cuff forming sheet 30 located in the outward overhanging portion 3B. In the outer overhanging portion 3B located in the front region F and the rear region of the diaper 1, the outer region 3S and the inner region 3S and the inner region 3S are independently provided, provided that the above-mentioned width relationship of the outer overhanging portion 3B is satisfied. The area 3T may or may not be formed.

The configuration relating to the second bent portion 51 and the third bent portion 53 described above may satisfy any of the above-mentioned configurations, or may be configured by combining the above-mentioned configurations. In order to form the above-mentioned second bent portion 51 and the third bent portion 53, for example, the cuff forming sheet 30 is formed so that the above-mentioned second bent portion 51 and the third bent portion 53 are formed at predetermined positions. May be used by fixing it at the front end portion and the rear end portion in the vertical direction X in a state of being bent in advance and giving a bending habit. Alternatively, the extensional stress in the vertical direction X of the cuff elastic member 37 located inside the lateral direction Y of the outward overhanging portion 3B is the extension stress in the vertical direction X of the cuff elastic member 37 located outside the lateral direction Y. It may be configured to be higher than.

The leak-proof cuffs 3 shown in FIGS. 3, 6 and 7, respectively, contained the cuff elastic member 37 in the outer region 3S, but the form of the leak-proof cuff 3 in the front region F and the rear region R is this. Not limited to. For example, as shown in FIG. 8, in the outward overhanging portion 3B, the second bent portion 51 extending in the vertical direction X has a free end portion 32 and a cuff elastic member 37 arranged closest to the free end portion 32. It may be located between. In the form shown in FIG. 8, the outer overhanging portion 3B does not have the cuff elastic member 37 in the outer region 3S.

In the leakage-proof cuff 3 in the front region F and the rear region R shown in FIG. 9, the outer overhanging portion 3B does not have a bent portion other than the first bent portion 35. In the present embodiment, the outward overhanging portion 3B has the front region F and the rear region F by making the positions of the first bent portion 35 in the lateral direction Y different between the central region C and the front region F and the rear region R. The width of the outer overhanging portion 3B along the lateral direction Y in the central region C is made smaller than the width of the outer overhanging portion 3B along the lateral direction Y in the central region C.
As shown in FIG. 9, as a method of making the position of the first bent portion 35 in the lateral direction Y different between the central region C and the front region F and the rear region R, for example, a reciprocating motion along the lateral direction Y Examples thereof include a method of forming the first bent portion 35 in a pattern curved in the vertical direction X by using a swing bending device.

The material for forming the leak-proof cuff of each of the above-described embodiments will be described in detail. Examples of the resin constituting the cuff elastic member 37 include, for example, natural rubber, EVA rubber, styrene-butadiene rubber, butadiene rubber, synthetic rubber such as isoprene rubber and neoprene rubber, polyurethane and thermoplastic elastomer. Examples of the thermoplastic elastomer include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). Examples thereof include olefin-based elastomers such as styrene-based elastomers, ethylene-based α-olefin elastomers and propylene-based elastomers obtained by copolymerizing ethylene, butene, octene and the like, polyester-based elastomers, and polyurethane-based elastomers. These constituent resins may be used alone or in combination of two or more. As the constituent resin of the leg elastic member 42, the above-mentioned one can be used in the same manner.

As the cuff forming sheet 30, a hydrophobic sheet material is preferably used from the viewpoint of surely fulfilling a role of preventing leakage of body fluid such as urine to the outside. Examples of the hydrophobic sheet material include non-woven fabrics, and more particularly, air-through non-woven fabrics, spunbonded non-woven fabrics, and melt-blown non-woven fabrics. Alternatively, a non-woven fabric having a multi-layer structure such as a spunbond-melt blown-spunbond non-woven fabric can be used. In addition to these, as the cuff forming sheet 30, a hydrophobic resin film, a laminate of the resin film and the non-woven fabric, and the like can be used.

Further, as the leak-proof cuff 3, the elastic sheets described in JP-A-2008-179128 and JP-A-2007-22066 can be used. In this case, as the cuff elastic member 37, for example, a fiber made of an elastic resin such as rubber or a thermoplastic elastomer such as the above-mentioned styrene-based elastomer, olefin-based elastomer, polyester-based elastomer or polyurethane-based elastomer can be used. Further, as the sheet material, various non-woven fabrics described in the cuff forming sheet 30 can be used.

As described above, the leak-proof cuff 3 is preferably configured to include the cuff elastic member 37 and the non-stretchable cuff-forming sheet 30 made of a non-woven fabric, and the cuff-forming sheet constituting the leak-proof cuff 3. 30 preferably has a ring crush compressive strength in a predetermined range. Specifically, the cuff forming sheet 30 has a ring crush compressive strength measured by a method described later, preferably 10.0 N / 30 mm or less, more preferably 8.0 N / 30 mm or less, still more preferably 7.5 N /. It is preferably 30 mm or less, and the lower the lower limit is, the more preferable, but 1.0 N / 30 mm or more is realistic.
By having such physical properties, the cuff forming sheet 30 is easily bent by an external force, so that the leak-proof cuff 3 can be easily formed with the first bent portion 35 and the outward overhanging portion 3B in the entire vertical direction X. , The fit of the diaper in the entire front-back direction of the wearer can be further improved. Further, the second bent portion 51 and the third bent portion 53 can be easily formed in the front region F and the rear region R of the leak-proof cuff, so that the leak-proof cuff 3 and the wearer's skin are in excessive contact with each other. Can be suppressed.

The ring crush compressive strength can be measured as follows. First, five cuff-forming sheets 30 constituting the leak-proof cuff 3 are cut into a rectangular shape having a length of 150 mm along the vertical direction X and a length of 30 mm along the horizontal direction Y, and these are used as test pieces. Each test piece is rolled into a cylinder in the longitudinal direction of the test piece, and one end and the other end of the test piece in the longitudinal direction are overlapped by 5 mm to form a cylinder having a diameter of 45 mm. Staples [for example, manufactured by Max Co., Ltd., No. 10-1M needle] is used to fasten to obtain 5 cylindrical measurement samples. The direction of the needle is parallel to the circumferential direction. Each of the obtained measurement samples (initial sample width; 30 mm) is set in a Tencilon compression tester (“RTA-100” manufactured by Orientec Co., Ltd.), and a circular compression plate with a diameter of 70 mm or more is used in the axial direction of the cylinder ( In the lateral direction of the sample), the maximum load (N / 30 mm) shown when compressed at a compression rate of 10 mm / min is measured. Similar measurements are made for the five measurement samples and their arithmetic mean is taken as the ring crush compression strength of the cuff forming sheet 30.

FIG. 10 schematically shows an arrangement position of the cuff elastic member 37 in the design dimensions of the leak-proof cuff 3 and an embodiment of the cuff forming sheet 30. As shown in FIG. 10, the cuff forming sheet 30 constituting the leak-proof cuff 3 has a plurality of high fiber density portions 80 scattered on the condition that it is composed of a non-stretchable fiber sheet such as a non-woven fabric. It is preferable to have it in. In the high fiber density portion 80, as compared with other parts of the cuff forming sheet 30, the distance between the fibers constituting the sheet is shortened, or a part or all of the fiber structure disappears to form a film, so that the fibers are formed. It is a part where the density is high. By having such a configuration, the fold structure in which the high fiber density portion 80 having high fiber density and high rigidity as compared with other parts of the sheet material is the starting point of bending of the sheet material is formed. It is successfully formed on the leak-proof cuff 3. As a result, the flexibility of the leak-proof cuff is improved, and the feel and fit of the leak-proof cuff to the wearer's body are improved. Such a high fiber density portion 80 is formed, for example, by subjecting the nonwoven fabric to be used to consolidation processing such as embossing in advance, or by partially subjecting the nonwoven fabric to be entangled by a machine such as needle punching or spunlacing. be able to.

Each of the high fiber density portions 80 shown in FIG. 10 has an elliptical plan view shape, and these are formed at intervals in both the vertical direction X and the horizontal direction Y. The plan view shape of the high fiber density portion 80 may be an isotropic shape such as a perfect circle, a square, a regular hexagon, or a regular octagon, or may be a shape having anisotropy such as a rectangle or an ellipse.

Further, when the high fiber density portion 80 is formed on the cuff forming sheet 30, as shown in FIG. 10, the distance W5 along the lateral direction Y between the adjacent cuff elastic members 37 in the leakage-proof cuff 3 is the lateral direction. It is preferably larger than the distance W6 between the high fiber density portions 80 adjacent to Y. With such a configuration, the sheet can be easily bent between the adjacent cuff elastic members 37, so that the second bent portion 51 and the third bent portion 53 are successfully formed on the outward overhanging portion 3B. Will be done. As a result, it is possible to further suppress the leakage-proof cuff 3 from being excessively adhered to the wearer's skin in the anterior region F and the posterior region R.

The distance W5 (see FIG. 10) between the adjacent cuff elastic members 37 along the lateral direction Y is preferably 1 mm or more, more preferably 2 mm or more, preferably 10 mm or less, still more preferably 9 mm or less. Further, the distance W6 (see FIG. 10) between the high fiber density portions 80 adjacent to each other in the lateral direction Y is preferably 0.5 mm or more, more preferably 1.0 mm or more, provided that W5> W6 is satisfied. It is preferably 5.0 mm or less, more preferably 4.5 mm or less.

As the absorbent article having the above structure, a deployable disposable diaper has been described as an example, but any absorbent article having a leak-proof cuff can be applied. Examples of such absorbent articles include, but are not limited to, deployable disposable diapers, pants-type disposable diapers, incontinence pads, and menstrual napkins.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment. For example, in the embodiment shown in FIG. 7 described above, the embodiment in which the second bent portion 51 and the third bent portion 53 are not formed in the outward overhanging portion 3B located in the central region C of the diaper 1 has been described as an example. , At least of the second bent portion 51 and the third bent portion 53 on the outer overhanging portion 3B located in the central region C of the vertical direction X of the diaper 1, provided that “length W1> length W2” is satisfied. One may be formed.
Further, in the above-described embodiment, the leak-proof cuff 3 is formed by folding one cuff-forming sheet 30, but it may be formed by a plurality of cuff-forming sheets 30. For example, a cuff elastic member 37 may be sandwiched between two cuff-forming sheets 30 and the cuff-forming sheets 30 may be fixed to each other with an adhesive or the like.

Further, in the leak-proof cuff 3 in the present embodiment, as shown in FIGS. 3 to 9, only the outer overhanging portion 3B protruding laterally Y outward from the first bent portion 35 was formed. Instead of this, in addition to the outward overhanging portion 3B protruding outward in the lateral direction Y from the position of the first bent portion 35, the inward overhanging portion extending inward in the lateral direction Y from the position of the first bent portion 35. Further units may be provided. The leakage-proof cuff 3 has, for example, a T-shaped structure in a cross section along the lateral direction Y.

Further, the following absorbent articles are disclosed with respect to the above-described embodiment of the present invention.
<1>
A central region having a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and an anterior region and a posterior region extending in front of and behind the central region. An absorbent article having a pair of leak-proof cuffs extending in the vertical direction provided on the skin facing surface.
Each of the leak-proof cuffs has a base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. Have and
Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. It is divided into overhanging parts and
The outward overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state.
In the natural state, the outward overhanging portion has a width along the lateral direction in the front region and the rear region smaller than the width along the lateral direction in the central region.
Each of the elastic members has a fixing portion in which at least a part in the vertical direction is fixed to the outer overhanging portion in each of the front region and the rear region, and each of the elastic members of the outer overhanging portion has. An absorbent article in which all elastic members arranged in the outward overhanging portion are arranged laterally spaced apart and parallel to each other in the region having the fixing portion.

<2>
The absorbency according to <1>, wherein in the parallel state, the inclination angle between the elastic members arranged in the outward overhang portion in the vertical direction is within 2 °, preferably within 1 °. Goods.
<3>
The outward overhanging portion has a second bent portion extending in the vertical direction between the free end portion and the bent portion in the front region and the rear region, said <1> or <. 2> The absorbent article.
<4>
The absorbent article according to <3>, wherein the outer region located between the free end portion and the second bent portion is folded inward in the lateral direction.
<5>
The absorbent article according to <4>, wherein the outer overhanging portion is not joined to the folded outer region and a portion facing the outer region.
<6>
The absorbent article according to <4> or <5>, wherein in the outer region, the elastic member is folded inward in the lateral direction together with a sheet forming the outer region.
<7>
In each of the front region and the rear region, the percentage of the length of the outer region along the lateral direction to the length of the design dimension of the outer overhanging portion including the outer region along the lateral direction is 1% or more, preferably 2% or more, 100% or less, preferably 50% or less, and 1% or more and 100% or less, preferably 2% or more and 50% or less. 6> The absorbent article according to any one of.
<8>
In the outward overhanging portion, the elastic member located inward in the lateral direction has a higher elongation stress than the elastic member located outward in the lateral direction, any one of <1> to <7>. Absorbent article described in.
<9>
The elongation ratio of the elastic member arranged on the outer overhanging portion is 1.5 times or more, preferably 2.0 times or more, and 3.5 times or less, preferably 3.0 times or less. The absorbent article according to <8>, which is 1.5 times or more and 3.5 times or less, preferably 2.0 times or more and 3.0 times or less.
<10>
Equipped with an absorbent body including a liquid-retaining absorber,
Each of the leakage-proof cuffs has a cuff fixing region in which the lower portion is fixed to the absorbent main body in each of the front region and the rear region.
The absorbent article according to any one of <1> to <9>, wherein the end portion of the absorber in the vertical direction overlaps the cuff fixing region in the vertical direction.

<11>
Equipped with a liquid-retaining absorber,
The rear region has a dorsal telescopic region in which a plurality of elastic members extending in the lateral direction are arranged in an extended state.
When the end edge of the front region is the front end and the end edge of the rear region is the rear end in the longitudinal direction, the end portion of the absorber in the longitudinal direction in the rear region is the most in the dorsal elastic region. The absorbent article according to any one of <1> to <10>, which is located on the rear end side of the elastic member located on the front end side.
<12>
The absorbency according to <11>, wherein at least one or more of the plurality of elastic members in the dorsal stretchable region is located on the rear end side of the end portion of the absorber in the vertical direction. Goods.
<13>
The absorbent article according to <11> or <12>, wherein the dorsal stretchable region does not overlap at least the central portion of the absorber in the lateral direction in a plan view.
<14>
A liquid-retaining absorber, a back sheet arranged on the non-skin facing side of the absorber, and a pair of sides extending outward from both sides of the absorber along the vertical direction. It is provided with a flap portion and a fastening tape arranged so as to extend from both lateral edges of the side flap portion located in the rear region.
The absorbent article according to any one of <1> to <13>, wherein one end of the fastening tape is fixed between the back surface sheet and the cuff forming sheet forming the leakage-proof cuff. ..
<15>
The rear region has a dorsal telescopic region in which a plurality of elastic members extending in the lateral direction are arranged in an extended state.
The fastening tape and the dorsal stretchable region that can be expanded and contracted in the lateral direction overlap in the vertical direction, and the dorsal stretchable region overlaps with the region in which the leak-proof cuff stands up in the vertical direction. The absorbent article according to <14> above.
<16>
In the natural state of the absorbent article, the length W1 of the outward overhanging portion in the central region along the lateral direction is 5 mm or more, preferably 10 mm or more, and 25 mm or less, more preferably 20 mm or less. The absorbent article according to any one of <1> to <15>, which is 5 mm or more and 25 mm or less, preferably 10 mm or more and 20 mm or less.
<17>
The length W2 of the outer overhanging portion in the front region and the rear region along the lateral direction is independently 4 mm or more, preferably 9 mm or more, and 24 mm or less, preferably 19 mm or less. The absorbent article according to any one of <1> to <16>, which is 4 mm or more and 24 mm or less, preferably 9 mm or more and 19 mm or less.
<18>
In the leak-proof cuff, the distance W5 between the adjacent elastic members along the lateral direction is 1 mm or more, preferably 2 mm or more, and 10 mm or less, preferably 9 mm or less, and 1 mm or more and 10 mm or less, preferably. The absorbent article according to any one of <1> to <17>, which is 2 mm or more and 9 mm or less.
<19>
The cuff forming sheet forming the leak-proof cuff has a plurality of high fiber density portions in a scattered pattern.
The distance W5 between the adjacent elastic members in the leakage-proof cuff along the lateral direction is larger than the distance W6 between the high fiber density portions adjacent to each other in the lateral direction, and the distance W6 between the high fiber density portions is 0. It is 5.5 mm or more, preferably 1.0 mm or more, and 5.0 mm or less, preferably 4.5 mm or less, and 0.5 mm or more and 5.0 mm or less, preferably 1.0 mm or more and 4.5 mm or less. , The absorbent article according to any one of <1> to <18>.

1 Absorbent article 2 Absorbable body 3 Leakage-proof cuff 30 Cuff forming sheet 31 Base end 32 Free end 35 1st bending part 37 Cuff elastic member 3A Lower part 3B Outer overhanging part 51 2nd bending part 53 3rd bending Part 80 High fiber density part 90 Fixed part X Vertical direction Y Horizontal direction

Claims (10)

A central region having a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and an anterior region and a posterior region extending in front of and behind the central region. An absorbent article having a pair of leak-proof cuffs extending in the vertical direction provided on the skin facing surface.
Each of the leak-proof cuffs has a base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. Have and
Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. It is divided into overhanging parts and
The outward overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state.
In the natural state, the outward overhanging portion has a width along the lateral direction in the front region and the rear region smaller than the width along the lateral direction in the central region.
Each of the elastic members has a fixing portion in which at least a part in the vertical direction is fixed to the outer overhanging portion in each of the front region and the rear region, and each of the elastic members of the outer overhanging portion has. An absorbent article in which all elastic members arranged in the outward overhanging portion are arranged laterally spaced apart and parallel to each other in the region having the fixing portion. The first aspect of the present invention, wherein the outward overhanging portion has a second bent portion extending in the vertical direction between the free end portion and the bent portion in the front region and the rear region. Absorbent article. The absorbent article according to claim 2, wherein the outer region located between the free end portion and the second bent portion is folded inward in the lateral direction. The absorbent article according to claim 3, wherein the outer overhanging portion is not joined to the folded outer region and a portion facing the outer region. The absorbent article according to claim 3 or 4, wherein in the outer region, the elastic member is folded inward in the lateral direction together with a sheet forming the outer region. The one according to any one of claims 1 to 5, wherein in the outward overhanging portion, the elastic member located inward in the lateral direction has a higher elongation stress than the elastic member located outward in the lateral direction. Absorbent article. Equipped with an absorbent body including a liquid-retaining absorber,
Each of the leakage-proof cuffs has a cuff fixing region in which the lower portion is fixed to the absorbent main body in each of the front region and the rear region.
The absorbent article according to any one of claims 1 to 6, wherein the end portion of the absorber in the vertical direction overlaps the cuff fixing region in the vertical direction. Equipped with a liquid-retaining absorber,
The rear region has a dorsal telescopic region in which a plurality of elastic members extending in the lateral direction are arranged in an extended state.
When the end edge of the front region is the front end and the end edge of the rear region is the rear end in the longitudinal direction, the end portion of the absorber in the longitudinal direction in the rear region is the most in the dorsal elastic region. The absorbent article according to any one of claims 1 to 7, which is located on the rear end side of the elastic member located on the front end side. The absorbent article according to claim 8, wherein at least one or more of the plurality of elastic members in the dorsal stretchable region is located on the rear end side of the end portion of the absorber in the vertical direction. .. The absorbent article according to claim 8 or 9, wherein the dorsal stretchable region does not overlap at least the central portion of the absorber in the lateral direction in a plan view.

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