JP2023075935A - absorbent article - Google Patents

Abstract

To provide an absorbent article which is excellent in fitness to a body of a wearer.SOLUTION: When an absorbent body 2 is in an unfolded and fully stretched state, and a side panel 7 is in a natural state, if a virtual straight line V1 passing through an intersection point P1 of an inner end of the side panel 7 in a longitudinal direction and a side edge 2S of the absorbent body 2 and an intersection point P2 of an inner end of a fastening tape 8 in a longitudinal direction and an outer side edge 7X1 of the side panel 7 is drawn with respect to each one of a pair of fastening members 6, 6, an intersection point P3 of the two virtual straight lines V1, V1 is positioned closer to an abdominal side part A than a longitudinal center line CLx of a diaper 1.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an expandable absorbent article provided with a fastening member used when worn.

Absorbent articles such as disposable diapers typically have an abdominal portion arranged on the abdomen side of the wearer, a dorsal portion arranged on the back side of the wearer, and a crotch portion located between them, and are worn. An absorbent body including an absorbent body for absorbing and retaining body fluids of a person is provided. Conventionally, a pair of side panels having elasticity in the horizontal direction orthogonal to the vertical direction are provided on both side edges along the vertical direction (the direction corresponding to the front-rear direction of the wearer) of the absorbent main body in the dorsal portion. An unfolded disposable diaper is known, which is attached so as to extend outward in the lateral direction from the side edge, and in which a fastening tape is attached to the leading end of each side panel in the extending direction (Patent Document 1, 2). This unfoldable diaper can be worn by stretching the fastening tape on the back portion toward the abdomen of the wearer and fastening the fastening portion provided at the tip of the tape to the outer surface of the abdomen portion. The absorbent article having such side panels can be manufactured by manufacturing the side panels in a separate process from the absorbent main body and adding them to the absorbent main body. It is possible to reduce the amount and the waste generated from the material, and it is excellent in terms of environment and cost.

In Patent Document 3, in an absorbent article having a pair of left and right side panels, two virtual lines passing through the fixing point of each side panel with the absorbent main body and the fixing point of the fastening tape with the side panel By focusing on the intersection of the straight lines and appropriately setting the position of the non-stacked portion of the absorbent core where the forming material is not substantially present in relation to the intersection, It is described that problems such as deterioration of fit can be solved.

JP 2012-120663 A JP 2012-125353 A JP 2017-51281 A

In general, an unfolded diaper has fewer stretchable parts than a pants-type diaper having a waist opening and leg openings, and therefore has good fit to the wearer's body, especially to the wearer's buttocks. less durable and prone to leaks. Securing members, such as fastening tapes, included in spreadable diapers have a considerable influence on the fit of diapers, and there is a demand for improvements in this regard.

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorbent article that fits well to the wearer's body.

The present invention has a longitudinal direction extending from the wearer's abdomen to the dorsal side through the crotch portion and a lateral direction perpendicular to the longitudinal direction, and has a crotch portion arranged in the crotch portion when worn, and a crotch portion from the crotch portion. an absorbent main body having an abdominal portion arranged on the abdomen side of the wearer and a back portion arranged on the back side of the wearer rather than the crotch portion, the absorbent body including an absorbent body; and a pair of fastening members fixed to both side edges along the longitudinal direction of the absorbent main body according to the above.
In one embodiment of the absorbent article of the present invention, the pair of fastening members each extend outward in the horizontal direction from side edges along the vertical direction of the absorbent main body. A side panel fixed to the main body and a fastening tape fixed to the side panel to extend outward in the lateral direction from the longitudinal outer edge of the side panel.
In one embodiment of the absorbent article of the present invention, when the absorbent main body is in the unfolded and maximum stretched state and the side panels are in the natural state, the side panels are attached to each of the pair of fastening members. An imaginary straight line passing through an intersection point P1 between the longitudinal inner edge and the side edge of the absorbent body and an intersection point P2 between the longitudinal inner edge of the fastening tape and the outer edge of the side panel. When V1 is drawn, the intersection point P3 of the two imaginary straight lines V1 is positioned closer to the abdominal side than the center of the absorbent article in the longitudinal direction.
Other features, advantages and embodiments of the invention are described below.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article excellent in the fitting property with respect to a wearer's body is provided.

FIG. 1 is a schematic unfolded plan view of the side facing the skin (surface sheet side) of a disposable diaper, which is one embodiment of the absorbent article of the present invention, in the unfolded state. , the members of the diaper that do not overlap with the absorbent main body in plan view are in an unfolded and natural state. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II in FIG. 1 (a cross section along the thickness direction and lateral direction of the absorbent article). FIG. 3 is a cross-sectional view schematically showing a cross section along the line II-II in FIG. 1 (a cross section along the thickness direction and lateral direction of the absorbent article).

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on its preferred embodiments with reference to the drawings. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. The drawings are basically schematic, and the ratio of each dimension may differ from the actual one.

1 to 3 show a disposable diaper 1 that is one embodiment of the absorbent article of the present invention. The diaper 1 has a longitudinal direction X corresponding to the front-rear direction of the wearer, that is, a direction extending from the abdominal side to the back side through the crotch portion, and a lateral direction Y perpendicular to the longitudinal direction X. As shown in FIG. In addition, the diaper 1 includes a crotch portion B including an excretory portion facing portion (not shown) that is arranged in the crotch portion of the wearer and faces the excretory portion such as the penis, and a abdomen side of the wearer ( It has an abdominal portion A arranged on the front side) and a dorsal portion C arranged on the back side (rear side) of the wearer from the crotch portion B.

The diaper 1 is a so-called unfolded diaper, and has an absorbent main body 2 including an absorbent body 5 and an absorbent main body 2 at the back side portion C fixed to both side edge portions (side flap portions 21) along the longitudinal direction X of the absorbent main body 2. A pair of fastening members 6, 6 are provided, and the fastening member 6 (more specifically, the fastening portion 82 of the fastening tape 8 described later) is covered with the outer surface (non-skin facing surface) of the absorbent main body 2. It is designed to be attached to the wearer by being attached to the wearing region 9 .

In this embodiment, the diaper 1 is formed symmetrically on one side and the other side with respect to the lateral center line CLy in the unfolded and maximum stretched state.
The abdomen portion A is part of the front body F of the diaper 1 , and the back portion C is part of the back body R of the diaper 1 . The crotch part B straddles the longitudinal center line CLx in the longitudinal direction X and exists over both the front body F and the back body R.
In the present invention, the abdominal portion A, the crotch portion B, and the back portion C can be regions when the diaper 1 in the unfolded and maximum stretched state is divided into three equal parts in the longitudinal direction X.
The horizontal center line CLy is an imaginary straight line that extends in the vertical direction X and bisects the diaper 1 in the unfolded and maximum stretched state in the horizontal direction Y. As shown in FIG. Further, the vertical center line CLx is an imaginary straight line extending in the horizontal direction Y by halving the diaper 1 in the unfolded and maximum stretched state in the vertical direction X. As shown in FIG.

The above-mentioned "unfolded and maximum stretched state" means that the object (absorbent article, etc.) is spread into a flattened state, and the elastic members of each part of the unfolded state of the object are stretched to the maximum, and the design dimensions, In other words, it refers to a state in which the dimension is the same as that of a flat sheet in which the influence of the elastic member is completely eliminated. Note that the diaper 1 shown in FIG. 1 is not entirely in the unfolded and maximum stretched state, but partially in the natural state. That is, in the diaper shown in FIG. 1, the absorbent main body 2, more specifically, the absorbent main body 2 and the members overlapping therewith in plan view, are in the unfolded and maximally stretched state. Members that do not visually overlap, specifically the side panel 7, the fastening tape 8, and the ventral flap 14, which will be described later, are in an unfolded and natural state. The "natural state" referred to here refers to a state in which no external force acts.

In this embodiment, the absorbent main body 2 has a rectangular shape elongated in the longitudinal direction X in plan view in the unfolded and maximum stretched state as shown in FIG. The absorbent main body 2 is a main member of the diaper 1, and in addition to the absorbent body 5, the topsheet 3 disposed on the skin facing side of the absorbent body 5 and the absorbent body 5 on the non-skin facing side of the absorbent body 5 are arranged. and a backsheet 4 positioned thereon. Both sheets 3 and 4 extend outward in the longitudinal direction X from both ends of the absorbent body 5 in the longitudinal direction X, and extend outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 5 . extended to The constituent members of the absorbent main body 2 are joined together by a known joining means such as an adhesive. The absorbent main body 2 has at least one of the portion where the three types of members 3, 4, and 5 are arranged (the portion overlapping the absorber 5 in plan view) and the members 3 and 4 other than the absorber 5. and a flap portion.

As used herein, the term "skin-facing surface" refers to the surface facing the wearer's skin when the absorbent article is worn, when focusing on the absorbent article or its constituent members (e.g., absorbent body). "Facing side" is the side facing away from the wearer's skin when the absorbent article is worn. That is, the skin-facing surface is the outer surface on the side relatively close to the wearer's skin, and the non-skin-facing surface is the outer surface on the side relatively far from the wearer's skin. In addition, "when worn" and "worn state" refer to a state in which the absorbent article is worn while maintaining an appropriate wearing position.

As the constituent members of the absorbent main body 2, those commonly used in this type of absorbent article can be used without particular limitation.
As the surface sheet 3, various liquid-permeable sheets can be used, such as nonwoven fabric, woven fabric, and paper.
As the back sheet 4, a sheet having a leakproof property, specifically, a liquid impermeable (a property that does not allow liquid to pass at all) or a liquid impermeable (although it cannot be said to be liquid impermeable, it is difficult for liquid to pass through). properties), and examples thereof include a moisture-permeable resin film and a laminate of the resin film and a nonwoven fabric.
The absorbent body 5 typically includes at least an absorbent core mainly composed of a water absorbent material. Examples of the water-absorbing material include hydrophilic fibers and water-absorbing polymers, and these may be used alone or in combination of two or more. As the hydrophilic fibers, for example, natural fibers such as wood pulp, hydrophilic synthetic fibers, and the like can be used. As the water-absorbent polymer, those conventionally used in this type of absorber can be used without particular limitation, and examples thereof include polymers or copolymers of acrylic acid or alkali metal salts of acrylic acid.

The absorbent body 5 of the present embodiment includes a first core 51 and a second core 52 arranged on the non-skin facing side of the first core 51, as shown in FIGS. Both cores 51 and 52 are absorbent cores mainly composed of a water absorbent material. The absorbent core can be roughly classified into the following fiber stack type and sheet type, and either type can be used in the present invention.
A fiber-stacked type absorbent core typically has a structure in which an aggregate of fibrous materials such as hydrophilic fibers is the main component, and water-absorbing polymer particles are supported on the aggregate as necessary. The fiber stacking type absorbent core can be manufactured according to a conventional method using a known fiber stacking device equipped with a rotating drum. The fiber stacking device typically includes a rotating drum having an accumulating recess formed on its outer peripheral surface, and a channel for conveying the absorbent core forming material (fibers, water-absorbing polymer particles) to the accumulating recess. and a duct provided inside, and while rotating the rotating drum around the rotating shaft along the circumferential direction of the drum, the air is transported on the air flow generated in the flow path by the suction from the inside of the rotating drum. The forming material is stacked in the stacking concave portion.
A sheet-type absorbent core typically has a structure in which water-absorbing polymer particles are fixed inside or on the surface of a fiber sheet, and is also called an absorbent sheet. As the fiber sheet, for example, paper, nonwoven fabric, or the like can be used. A sheet-type absorbent core is thinner and more flexible than a pile-type absorbent core. A sheet-type absorbent core may have, for example, a configuration in which water-absorbent polymer particles are interposed between two fiber sheets facing each other. As the sheet-type absorbent core, those described in Japanese Patent No. 2963647 and Japanese Patent No. 2955223 can also be used.

In the present invention, one of the two cores 51 and 52 may be of the stacked type and the other of the sheet type, or both may be of the stacked type or the sheet type. A preferred embodiment of the absorbent body 5 includes a configuration in which the first core 51 is of the stacked type and the second core is of the sheet type.
The basis weight of the piled-type absorbent core is preferably 150 g/m ² or more, more preferably 200 g/m ² or more, and preferably 600 g/m ² or less, more preferably 500 g/m ² or less.
The basis weight of the sheet-type absorbent core is preferably 50 g/m ² or more, more preferably 75 g/m ² or more, and preferably 300 g/m ² or less, more preferably 250 g/m ² or less.

The thickness of the absorbent body 5 under no pressure before absorbing body fluid is preferably 2.5 mm or more, more preferably 3.0 mm or more, and preferably 6.0 mm or less, more preferably 5.5 mm or less.
The thickness of the first core 51 under no pressure before absorption of body fluid is preferably 2.0 mm or more, more preferably 2.5 mm or more, and preferably 4.5 mm or less, more preferably 4.0 mm or less.
The thickness of the second core 52 under no pressure before absorption of body fluid is preferably 0.4 mm or more, more preferably 0.5 mm or more, and preferably 4.0 mm or less, more preferably 3.5 mm or less.

In the present embodiment, the first core 51 and the second core 52 have different shapes in plan view. That is, in a plan view of the absorbent body 2 in the unfolded and maximally stretched state as shown in FIG. The length (width) in the lateral direction Y of the first core 51 is constant in the direction X, whereas the length (width) in the lateral direction Y of the first core 51 is not constant in the longitudinal direction X, and the first core 51 has a maximum lateral length (maximum width) and a It has two widths, a shorter minimum lateral length (minimum width). More specifically, the first core 51 includes a wide portion 510 having a relatively long width, a narrow portion 511 having a relatively short width, and being positioned between the portions 510 and 511 and extending in the longitudinal direction X. It has in the vertical direction X a width changing portion 512 whose width gradually increases from the inner side to the outer side (from the dorsal side to the ventral side). The width of the wide portion 510 is the maximum width of the first core 51, the width of the narrow portion 511 is the minimum width of the first core 51, and the width of the width changing portion 512 is intermediate between the maximum width and the minimum width. . The end in the longitudinal direction X on the side of the ventral portion A of the first core 51 (ventral end) is a wide portion 510, and the end in the longitudinal direction X on the side of the dorsal portion C of the first core 51 (dorsal side) end) is the narrow portion 511 . The width of the wide portion 510 is substantially the same as the width of the second core 52, while the width of the narrow portion 511 is narrower than that of the second core 52. , and a pair of extending portions extending outward in the lateral direction Y from both side edges along the longitudinal direction X of the first core 51 (narrow portion 511). The first core 51 has a shorter length in the vertical direction X than the second core 52, and extends inward in the vertical direction X by a predetermined distance from the end in the vertical direction X on the back side portion C side of the second core 52. A region extending between the pair of side panels 7, 7, excluding a region near the crotch portion B, is a non-placement region of the first core 51 (see FIGS. 1 and 3). In the diaper 1, the first core 51 is biased toward the abdominal portion A side.

The absorbent body 5 of this embodiment includes a core wrap sheet 53 covering the outer surfaces of both cores 51 and 52, as shown in FIGS. In the present embodiment, both the cores 51 and 52 are integrally covered with a core wrap sheet 53 in the regions where both the cores 51 and 52 are present (abdominal portion A, crotch portion B) (see FIG. 2). ), but both cores 51 and 52 may be individually covered with a core wrap sheet in this region. As the core wrap sheet 53, a liquid-permeable sheet is preferable, and for example, paper, nonwoven fabric, or the like can be used.

In this embodiment, the diaper 1 includes a pair of leak-preventing cuffs 10, 10 arranged along both sides of the absorbent body 2 along the longitudinal direction X. As shown in FIG. Each leak-proof cuff 10 includes a liquid-impermeable and breathable leak-proof sheet 11, and one end side of the leak-proof sheet 11 in the horizontal direction Y is attached to another member (back sheet 4 in the form shown in FIG. 2). The other end of the leakproof sheet 11 in the horizontal direction Y is a free end that is not fixed to another member. At the free end of the leak-proof sheet 11, a leak-proof cuff-forming elastic member 12 is fixed in a stretched state in the longitudinal direction X so as to be stretchable in the same direction. When the diaper 1 is put on, the contractile force of the elastic member 12 causes the free end portion of the leak-proof sheet 11 to stand up toward the wearer at least in the crotch portion B with the fixed end portion as the standing base end, thereby forming a pair. The anti-leakage cuffs 10, 10 are erected to prevent excretion such as urine from flowing outward in the lateral direction Y. In FIG. 2, for convenience of explanation, the leak-proof cuff 10 is shown in an upright state. It doesn't mean standing up.

In this embodiment, the absorbent main body 2 is provided with a flap part located outside the periphery of the absorbent body 5 . The flap portion is composed of a member arranged to straddle the periphery of the absorbent body 5, and includes a top sheet 3, a back sheet 4, and a leak-proof sheet 11 in the illustrated embodiment. A plurality of members forming the flap portion are joined together by a known joining means such as an adhesive, heat sealing, ultrasonic sealing, or the like. In the flap portion, both side edges along the longitudinal direction X of the absorbent body 5 and portions located outside the imaginary extension lines of the both side edges in the lateral direction Y are both side edges along the longitudinal direction X of the absorbent main body 2. The side flap portions 21 are the portions (in other words, both ends in the horizontal direction Y). The outermost portion in the lateral direction Y of the side flap portion 21 is the side edge 2S along the longitudinal direction X of the absorbent main body 2 . A leg gather forming elastic member 13 is arranged so as to be stretchable in the longitudinal direction X at least at a portion of each of the pair of side flap portions 21, 21 located at the crotch portion B. As shown in FIG.

The fastening member 6, which is one of the features of the diaper 1, will be described in detail below.
In this embodiment, the pair of fastening members 6, 6 each extend outward in the lateral direction Y from the side edge 2S of the absorbent main body 2, as shown in FIGS. A side panel 7 fixed to the main body 2 and a fastening tape 8 fixed to the side panel 7 so as to extend outward in the lateral direction Y from an outer edge 7X1 along the longitudinal direction X of the side panel 7 are included.

The side panel 7 preferably has elasticity in the lateral direction Y. As shown in FIG. In this embodiment, as shown in FIGS. 1 and 3, the side panel 7 includes an elastic member 72 arranged so as to be stretchable in the lateral direction Y, and the elastic member 72 imparts stretchability in the same direction. ing. That is, in this embodiment, the side panel 7 includes a panel material 71 that forms the main body of the side panel 7 and an elastic member 72 that is fixed to the panel material 71 so as to be able to expand and contract in the horizontal direction Y. As shown in FIG. More specifically, the side panel 7 includes two panel members 71, 71 facing each other, and between the two panel members 71, 71, an elastic member 72 extending in the horizontal direction Y is arranged in the vertical direction X. are arranged intermittently.
The material of the panel member 71 is not particularly limited, and examples thereof include nonwoven fabrics manufactured by various methods such as air through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric; woven fabric, knitted fabric, paper, resin film, and the like. A composite sheet obtained by laminating and integrating one or more of these can also be used.
In the present invention, the means for imparting elasticity in the horizontal direction Y to the side panel 7 is not particularly limited, and the panel material 71 may have elasticity in the horizontal direction Y. In that case, the side panel 7 may not have the elastic member 72 .

In this embodiment, the side panel 7 has a square shape (rectangular shape) in a plan view in a natural state as shown in FIG. The outer edge 7X1 of the side panel 7 to which the fastening tape 8 is fixed is positioned outward in the horizontal direction Y (on the side opposite to the absorbent main body 2 side) among both side edges 7X1 and 7X2 along the longitudinal direction X of the side panel 7. ). The inner edge 7X2 of the side panel 7 located on the side opposite to the outer edge 7X1 and the vicinity thereof (the inner edge of the side panel 7) are fixed to the side of the absorbent main body 2 by known fixing means such as adhesive and fusion bonding. It is fixed to the side flap part 21 which is an edge part. In the illustrated embodiment, the inner edge of the side panel 7 is fixed between two sheets (the back sheet 4 and the anti-leakage sheet 11) that constitute the side flap portion 21 (FIG. 3). ), may be fixed to the skin-facing surface of the side flap portion 21 (the skin-facing surface of the leak-proof sheet 11 in the illustrated embodiment), and may be fixed to the non-skin-facing surface of the side flap portion 21 (the back sheet 4 in the illustrated embodiment). non-skin facing surface).

As the fastening tape 8, one that can be used in this type of unfolded diaper can be used without any particular limitation. In this embodiment, the fastening tape 8 includes a rectangular tape substrate 81 in plan view and a fastening portion 82 fixed to the tape substrate 81, as shown in FIGS. The material of the tape base material 81 is not particularly limited, and for example, a nonwoven fabric, a laminate of a nonwoven fabric and a resin film, or the like can be used. One end of the fastening tape 8 in the longitudinal direction (horizontal direction Y) is fixed to the outer edge 7X1 of the side panel 7 and its vicinity (outer edge of the side panel 7) by known means such as adhesive or fusion. ing. In the illustrated embodiment, the fastening tape 8 is fixed to the non-skin-facing surface of the side panel 7 (see FIG. 3), but it may be fixed to the skin-facing surface of the side panel 7 .

The fastening portion 82 is fixed to the surface of the tape substrate 81 facing the skin of the extending portion from the outer edge 7X1 of the side panel 7. As shown in FIG. The fastening part 82 can be detachably fastened to the fastening region 9 (see FIG. 1) provided on the outer surface (non-skin-facing surface) of the absorbent main body 2 in the ventral part A. As shown in FIG. In the present invention, the fastening structure including the fastening portion 82 and the fastening region 9 is not particularly limited, and the fastening structure in this type of expandable diaper can be used without particular limitation. An example of the fastening structure is a mechanical hook-and-loop fastener. The term "mechanical hook-and-loop fastener" used here means a surface member (male member) with a hook material (engagement member) consisting of hook-shaped protrusions arranged on one side, and a loop material consisting of pile-shaped protrusions on one side. An arranged face member (female member) refers to a set of fasteners. A specific example of the mechanical hook-and-loop fastener is Velcro (registered trademark). Typically, the fastening portion 82 is the male member, and the fastening area is the female member, but the reverse is also possible.

As shown in FIG. 1, the diaper 1 of the present embodiment has a pair of abdominal flaps 14, 14 extending outward in the lateral direction Y from both side edges 2S, 2S of the absorbent body 2 at the abdomen A. It has The ventral flap 14 is fixed to the side edge portion (side flap portion 21) of the absorbent main body 2, similarly to the side panel 7. As shown in FIG. As for the fixing method (fixing means, fixing position, etc.) of the ventral flap 14 to the absorbent main body 2, the above-described explanation regarding the fixing method of the side panel 7 to the absorbent main body 2 is appropriately applied. The material of the ventral flap 14 is not particularly limited, and for example, a non-stretchable sheet material (for example, non-woven fabric) can be used. Note that the ventral flap 14 may be omitted.

One of the main roles of the ventral flap 14 is to assist the operation of putting on the diaper 1 . That is, when wearing the diaper 1, typically, while the abdominal portion A is temporarily fixed to the wearer's body, the fastening tape 8 of the back portion C is pulled toward the abdominal portion A, and the fastening tape is When the fastening portion 82 of 8 is to be fastened to the attachment region 9 of the ventral portion A, the tentative fastening of the ventral portion A is performed, for example, by pulling the ventral flap 14 to the dorsal portion C side. By using the ventral flap 14, the operation of putting on the diaper 1 can be performed more smoothly. In addition, when the fastening portion 82 is made of a relatively hard material such as a male member of a mechanical hook-and-loop fastener, the fastening portion 82 made of such a hard material may cause, for example, a mistake in the mounting operation or damage to the fastening portion 82 . If it comes into contact with the wearer's skin due to unexpected falling off from the wearing area 9, it may lead to skin troubles. The ventral flap 14 also plays a role of preventing inconvenience caused by such contact between the fastening portion 82 and the wearer's skin.

As one of the main characteristics of the diaper 1, as shown in FIG. , 6, the intersection P1 between the inner edge 7Y2 of the side panel 7 in the longitudinal direction X and the side edge 2S of the absorbent main body 2, the inner edge 8Y2 of the fastening tape 8 in the longitudinal direction X, and the side panel 7 When an imaginary straight line V1 passing through the intersection point P2 with the outer edge 7X1 of the diaper 1 is drawn, the intersection point P3 of the two imaginary straight lines V1, V1 is located further than the center of the diaper 1 in the longitudinal direction X (longitudinal center line CLx). It is positioned closer to the ventral side A (hereinafter also referred to as "first feature").
The inner end 7Y2 of the side panel 7 is the longitudinal end located inward in the longitudinal direction X (the side relatively close to the longitudinal center line CLx) of the lateral ends 7Y1 and 7Y2 of the side panel 7 along the lateral direction Y. is. The outer ends 7Y1 of the side panels 7 are farther from the longitudinal center line CLx than the inner ends 7Y2. In addition, the inner end 8Y2 of the fastening tape 8 is the longitudinal end positioned inward in the longitudinal direction X of both ends 8Y1 and 8Y2 of the fastening tape 8 along the lateral direction Y. As shown in FIG. The outer end 8Y1 of the fastening tape 8 is farther from the longitudinal center line CLx than the inner end 8Y2.

Since the absorbent article of the present invention represented by the diaper 1 has the first characteristic, it has excellent fit to the body of the wearer, particularly the fit of the back portion C to the buttocks of the wearer. That is, due to the first feature, the intersection point P3 of the two imaginary straight lines V1, V1 described above is located closer to the abdominal side portion A than the vertical center line CLx of the diaper 1. When the diaper 1 is gripped and pulled toward the wearer's skin side, the absorbent body 5 follows this and is easily brought into close contact with the wearer's skin side, and the fitting property of the absorbent body 5 can be improved. The imaginary straight line V1 substantially coincides with the line of force when the fastening tape 8 is pulled outward in the lateral direction Y in the operation of putting on the diaper 1, and the intersection point P3 grips the fastening tape 8 and pulls up the diaper 1. This is the point where the tensile force acts.

Regarding the first feature, the distance G1 (see FIG. 1) between the vertical center line CLx of the diaper 1 and the intersection point P3 is based on the premise that the intersection point P3 is located closer to the abdominal side portion A than the vertical center line CLx. It is preferably 3 mm or more, more preferably 5 mm or more, and preferably 60 mm or less, more preferably 50 mm or less.

In the present embodiment, as shown in FIG. 1, the fastening tape 8 overlaps an imaginary straight line V2 that bisects the side panel 7 in the vertical direction X and extends in the horizontal direction Y in a plan view, and the fastening tape 8 extends vertically. An imaginary straight line V3 that bisects in the direction X and extends in the horizontal direction Y is positioned outward in the vertical direction X from the imaginary straight line V2. In other words, in the present embodiment, the fastening tape 8 is not positioned in the center of the side panel 7 in the longitudinal direction X, and is located on the outer side in the longitudinal direction X of the center of the side panel 7 in the longitudinal direction X (the longitudinal center line CLx farther from). Hereinafter, such a configuration is also referred to as a "second feature".
According to the second feature, the fixing position of the fastening tape 8 on the side panel 7 is closer to the outer end 7Y1 than the center (virtual straight line V2) in the vertical direction X of the side panel 7, so the fastening tape 8 can be gripped. The degree of elongation of the side panel 7 when pulled is partially different in the vertical direction X. Specifically, the center of the fastening tape 8 in the vertical direction X (virtual straight line V3) located near the outer end 7Y1 is the largest. The degree of elongation is high, the degree of elongation is lowest at the inner end 7Y2, and the degree of elongation decreases from the imaginary straight line V3 toward the inner end 7Y2. As a result, the shape of the diaper 1 when the fastening tape 8 is gripped and pulled in the wearing operation of the diaper 1, particularly the shape of the back body R of the diaper 1 including the back portion C to which the side panel 7 is fixed, is changed. Since the diaper 1 conforms to the shape of the wearer's buttocks, the diaper 1 has excellent fit to the buttocks. Further, the effects of the first and second characteristics are combined to achieve the effects of the present invention more reliably.

Regarding the second feature, the distance G2 (see FIG. 1) between the imaginary straight line V2 of the side panel 7 and the imaginary straight line V3 of the fastening tape 8 is such that the imaginary straight line V2 is inward of the imaginary straight line V3 in the vertical direction X (vertical 5 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.

In the present embodiment, as shown in FIG. 1, the longitudinal direction of the portion of the outer edge 7X1 of the side panel 7 located inside the fastening tape 8 in the longitudinal direction X (the side relatively close to the longitudinal center line CLx) The length Lb of X is longer than the length La of the portion of the fastening tape 8 that overlaps the outer edge 7X1 in the longitudinal direction X. Hereinafter, such a configuration is also referred to as a "third feature".
According to the third feature, the length Lb corresponding to the interval in the vertical direction X between the fastening tape 8 and the inner end 7Y2 of the side panel 7 is longer than the length La corresponding to the fixed width of the fastening tape 8. (Lb>La holds), the back body R can always cover the entire buttocks of the wearer while the diaper 1 is worn, preventing the buttocks from sticking out and dispelling anxiety about leakage. In addition, the effects of the first to third characteristics are combined, and the effects of the present invention can be achieved more reliably.

Regarding the third feature, the ratio of the longitudinal length Lb of the side panel 7 to the longitudinal length La of the fastening tape 8 is preferably 1.1 or more as the former/latter on the premise that the former > the latter. It is more preferably 1.2 or more, preferably 1.8 or less, and more preferably 1.6 or less.
Provided that the longitudinal length La is shorter than the longitudinal length Lb, it is preferably 20 mm or more, more preferably 25 mm or more, and preferably 50 mm or less, more preferably 40 mm or less.
Assuming that the longitudinal length Lb is longer than the longitudinal length La, it is preferably 25 mm or more, more preferably 30 mm or more, and preferably 60 mm or less, more preferably 55 mm or less.

In the present embodiment having the third feature, as shown in FIG. 1, the outer edge 7X1 of the side panel 7 is positioned further outward in the longitudinal direction X than the fastening tape 8 (the side relatively far from the longitudinal center line CLx). The length Lc in the longitudinal direction X of the portion located at 1 is shorter than the length La in the longitudinal direction X of the overlapping portion of the fastening tape 8 with the outer edge 7X1. By establishing such a size relationship "longitudinal length Lc of the side panel 7<longitudinal length La of the fastening tape 8", the fit of the back side portion C is particularly improved, and the effects of the present invention are further enhanced. It will definitely play.
The ratio of the longitudinal length Lc of the side panel 7 to the longitudinal length La of the fastening tape 8 is preferably 0.2 or more, more preferably 0.25 or more, assuming that the former < the latter. , and is preferably 0.7 or less, more preferably 0.6 or less.
Given that the longitudinal length Lc is shorter than the longitudinal length La, it is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.

In the present invention, the vertical length Lc of the side panel 7 may be zero. That is, in the diaper 1, as shown in FIG. 1, the outer ends 7Y1 of the side panels 7 and the outer ends 8Y1 of the fastening tapes 8 differ in position in the longitudinal direction X, but in the present invention, both outer ends 7Y1 , 8Y1 may be at the same position in the vertical direction X.

In the present embodiment, as described above, the absorbent body 5 includes the first core 51 and the second core 52 arranged on the non-skin facing side thereof, and the length of the first core 51 in the horizontal direction Y ( width) is not constant in the longitudinal direction X, and the first core 51 has a maximum lateral length (maximum width) and a shorter minimum lateral length (minimum width). As shown in FIG. 1, the feature-related intersection point P3 overlaps a portion of the first core 51 other than the portion having the maximum width (wide portion 510). It overlaps with the narrow portion 511 which is a portion having a small width. With such a configuration, compared to the case where the intersection point P3 overlaps with the wide portion 510, the function and effect of the above-described first feature (the effect of improving the fit of the absorbent body 5 by the fastening tape 8) can be achieved more reliably. Become. In order to obtain such an effect, it is sufficient that the intersection point P3 overlaps with a portion of the first core other than the portion having the maximum width. A portion having an intermediate width between the wide width and the minimum width and the intersection point P3 may overlap.

In this embodiment, as shown in FIG. 1, the inner edge of the fastening tape 8 along the longitudinal direction X is fixed to the side panel 7 over the entire longitudinal direction X of the inner edge. More specifically, the inner edge 8X2 of the fastening tape 8 and the vicinity thereof (the inner edge portion) are applied from the outer end 8Y1 to the inner end 8Y2 of the fastening tape 8 by a known means such as adhesive or fusion bonding. , the outer edge 7X1 of the side panel 7 and its vicinity (the outer edge of the side panel 7). The inner edge 8X2 of the fastening tape 8 is a side edge positioned inward in the lateral direction Y (on the side of the absorbent main body 2) among both side edges along the longitudinal direction X of the fastening tape 8. As shown in FIG.
The manner in which the fastening tape 8 is fixed to the side panel 7 is in contrast to that in the absorbent article described in Patent Document 1. That is, in the absorbent article described in Patent Document 1, as described in FIG. 2 of the same document, the elastic waist panel 3 (side panel ) is only a portion of the upper edge 42b (outer edge) side, and the portion of the inner edge extending from the lower edge 42a (inner edge) to the upper edge 42b side with a distance d2 is It is not fixed to the elastic waist panel 3.
Since the entire inner edge of the fastening tape is fixed to the side panel as in the present embodiment, the fixing of the fastening tape to the side panel is further strengthened, and the fit of the absorbent article when worn is improved. The quality and appearance can be further improved. That is, according to the diaper 1, since the entire inner edge of the fastening tape 8 is fixed to the side panel 7, the fastening tape 8 is unlikely to come off from the side panel 7, and the fastening portion 82 of the fastening tape 8 is absorbed. Even if the wearer moves violently when the outer surface (non-skin facing surface) of the main body 2 is attached to the wearing area 9, the fit to the wearer's body, especially the wearing of the back side C The fit to the buttocks of the wearer can be maintained, and further, the side panel 7 is pulled by the entire inner edge of the fastening tape 8 when worn, so that a good silhouette can be obtained in appearance. played.

The absorbent article of the present invention includes a wide range of articles used to absorb bodily fluids (urine, loose stool, menstrual blood, sweat, etc.) excreted from the human body. Included are diaper covers, pad holders, and the like.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the present invention.
For example, the absorber 5 included in the diaper 1 described above has a laminated structure of the first core 51 and the second core 52, but the absorber according to the present invention may have a single layer structure.
The planar view shape of the absorber 5 (the first core 51 and the second core 52) is not particularly limited. For example, as described above for the first core 51, "the length (width) of the first core 51 in the horizontal direction Y is not constant in the vertical direction X, and the first core 51 has a maximum horizontal length (maximum large) and a shorter minimum lateral length (minimum width), the plan view shape of the first core 51 that satisfies this is not limited to the shape (rice scoop shape) shown in FIG. For example, it may have an hourglass shape.
The absorbent body 5 may have recesses having openings in at least one of the skin-facing surface and the non-skin-facing surface. For example, in the absorbent body 5 of the above embodiment, a through hole is formed in the first core 51 to penetrate the first core 51 in the thickness direction, and a through hole is formed in the second core 52 at a position corresponding to the through hole. If not, such a through-hole of the first core becomes the recess having an opening on the skin-facing surface of the absorbent body 5 . Further, for example, in the absorbent body 5 of the above-described embodiment, when a through-hole is formed that penetrates the first core 51 and the second core 52 in the thickness direction, the through-hole is formed on the skin-facing surface of the absorbent body 5 and the non-skin-facing surface. It becomes the said recessed part which has an opening in both sides of a skin facing surface.
The following notes are further disclosed with respect to the above-described embodiments of the present invention.

<1>
It has a longitudinal direction extending from the abdomen of the wearer to the dorsal side through the crotch portion and a lateral direction orthogonal thereto, and has a crotch portion arranged in the crotch portion when worn, and a crotch portion that is closer to the wearer than the crotch portion. An absorbent main body having an abdominal portion arranged on the abdominal side and a dorsal portion arranged on the dorsal side of the wearer from the crotch portion, the absorbent main body including an absorbent body, and the absorbency in the dorsal portion An absorbent article comprising a pair of fastening members fixed to both side edges along the longitudinal direction of the main body,
The pair of fastening members includes side panels fixed to the absorbent main body so as to extend outward in the horizontal direction from side edges along the longitudinal direction of the absorbent main body, and the side panels. a fastening tape secured to the side panel so as to extend outwardly in the lateral direction from the longitudinally outer edge of the
When the absorbent main body is in the unfolded and maximum stretched state and the side panels are in the natural state, the inner ends of the side panels in the longitudinal direction and the absorbent main body are positioned relative to each of the pair of fastening members. and the intersection point P2 between the longitudinal inner end of the fastening tape and the outer edge of the side panel. An absorbent article, wherein an intersection point P3 of the straight lines V1 is positioned closer to the abdominal portion than the center of the absorbent article in the longitudinal direction.
<2>
The distance (G1) between the longitudinal center (CLx) of the absorbent article and the intersection point P3 is preferably 3 mm or more, more preferably 5 mm or more, and preferably 60 mm or less, more preferably 50 mm or less. , the absorbent article according to <1>.
<3>
The fastening tape bisects the side panel in the longitudinal direction and overlaps the imaginary straight line V2 extending in the lateral direction in a plan view, and bisects the fastening tape in the longitudinal direction to extend in the lateral direction. The absorbent article according to <1> or <2> above, wherein the extending imaginary straight line V3 is located outside the imaginary straight line V2 in the longitudinal direction.
<4>
The distance (G2) between the virtual straight line V2 and the virtual straight line V3 is preferably 5 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less. absorbent article.

<5>
The longitudinal length Lb of the portion of the outer edge of the side panel located inward in the longitudinal direction from the fastening tape is compared to the longitudinal length La of the overlapping portion of the fastening tape with the outer edge. The absorbent article according to any one of <1> to <4>, which is long.
<6>
The ratio of the longitudinal length Lb to the longitudinal length La, as the former/latter, is preferably 1.1 or more, more preferably 1.2 or more, and preferably 1.8 or less, more preferably The absorbent article according to <5> above, which is 1.6 or less.
<7>
The absorbent article according to <5> or <6> above, wherein the longitudinal length La is preferably 20 mm or more, more preferably 25 mm or more, and preferably 50 mm or less, more preferably 40 mm or less.
<8>
The longitudinal length Lb is preferably 25 mm or more, more preferably 30 mm or more, and preferably 60 mm or less, more preferably 55 mm or less, according to any one of <5> to <7>. absorbent article.

<9>
<5> to <8>, wherein the longitudinal length Lc of the portion of the outer edge of the side panel positioned further outward in the longitudinal direction than the fastening tape is shorter than the longitudinal length La. Absorbent article according to any one of the above.
<10>
The ratio of the longitudinal length Lc and the longitudinal length La, as the former/latter, is preferably 0.2 or more, more preferably 0.25 or more, and preferably 0.7 or less, more preferably The absorbent article according to <9> above, which is 0.6 or less.
<11>
The absorbent article according to <9> or <10> above, wherein the longitudinal length Lc is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.
<12>
The longitudinal length Lc is zero, in other words, the outer edge (7Y1) of the side panel along the lateral direction and the outer edge (8Y1) of the fastening tape along the lateral direction The absorbent article according to any one of <9> to <11>, which are at the same position in the longitudinal direction.

<13>
The absorbent article according to any one of <1> to <12>, wherein the side panel has elasticity in the lateral direction.
<14>
The absorbent article according to any one of <1> to <13>, wherein the side panel includes a panel member and an elastic member fixed to the panel member so as to be stretchable in the lateral direction.
<15>
The absorbent article according to any one of <1> to <14>, wherein the side panel has a square shape (rectangular shape) in plan view in a natural state.
<16>
<1 > The absorbent article according to any one of <15>.
<17>
The absorbent article according to <16>, wherein the fastening portion is a male member of a mechanical hook-and-loop fastener.
<18>
Any one item of <1> to <17>, wherein the abdominal portion is provided with a pair of abdominal flaps extending outward in the lateral direction from both side edges along the longitudinal direction of the absorbent main body. Absorbent article according to.

<19>
The absorbent article according to any one of <1> to <18>, wherein the absorbent body includes a first core and a second core disposed on the non-skin facing side of the first core. .
<20>
The absorption according to <19> above, wherein the lateral length of the first core is not constant in the longitudinal direction, and the first core has a maximum lateral length and a shorter minimum lateral length. sexual goods.
<21>
The absorbent article according to <19> or <20> above, wherein the intersection point P3 overlaps a portion of the first core other than the portion having the maximum lateral length.
<22>
The first core and the second core are respectively a piled-type absorbent core mainly composed of an aggregate of fibrous materials, or a sheet-type absorbent core in which water-absorbent polymer particles are fixed inside or on the surface of a fiber sheet. sexual core,
The basis weight of the piled-up type absorbent core is preferably 150 g/m ² or more, more preferably 200 g/m ² or more, and preferably 600 g/m ² or less, more preferably 500 g/m ² or less. ,
The basis weight of said sheet-type absorbent core is preferably 50 g/m ² or more, more preferably 75 g/m ² or more, and preferably 300 g/m ² or less, more preferably 250 g/m ² , said The absorbent article according to any one of <19> to <21>.
<23>
The thickness of the absorbent body under no pressure before absorption of body fluid is preferably 2.5 mm or more, more preferably 3.0 mm or more, and preferably 6.0 mm or less, more preferably 5.5 mm or less,
The thickness of the first core under no pressure before absorption of body fluid is preferably 2.0 mm or more, more preferably 2.5 mm or more, and preferably 4.5 mm or less, more preferably 4.0 mm or less,
The thickness of the second core under no pressure before absorption of body fluid is preferably 0.4 mm or more, more preferably 0.5 mm or more, and preferably 4.0 mm or less, more preferably 3.5 mm or less. The absorbent article according to any one of <19> to <22>.
<24>
The absorbent article according to any one of <19> to <23>, wherein the absorbent body includes a core wrap sheet that integrally covers the first core and the second core.
<25>
The absorbent article according to any one of <1> to <24>, further comprising a pair of anti-leakage cuffs arranged along both sides of the absorbent main body along the longitudinal direction.
<26>
The absorbent main body includes a flap portion positioned outward from the peripheral edge of the absorbent body,
Both side edges along the longitudinal direction of the absorbent main body are positioned outward in the lateral direction from both side edges along the longitudinal direction of the absorbent body and imaginary extension lines of the both side edges of the flap portion. The absorbent article according to any one of <1> to <25>, which consists of a portion (side flap portion).
<27>
The inner edge of the fastening tape along the longitudinal direction is fixed to the side panel over the entire longitudinal length of the inner edge according to any one of <1> to <26>. absorbent article.

1 Disposable diaper (absorbent article)
A Abdominal part B Crotch part C Back part 2 Absorbent main body 2S Side edge 5 of absorbent main body Absorber 51 First core 510 First core wide part 511 First core narrow part 512 First core width Changed portion 52 Second core 6 Fastening member 7 Side panel 8 Fastening tape X Vertical direction Y Horizontal direction

Claims (8)

It has a longitudinal direction extending from the abdomen of the wearer to the dorsal side through the crotch portion and a lateral direction orthogonal thereto, and has a crotch portion arranged in the crotch portion when worn, and a crotch portion that is closer to the wearer than the crotch portion. An absorbent main body having an abdominal portion arranged on the abdominal side and a dorsal portion arranged on the dorsal side of the wearer from the crotch portion, the absorbent main body including an absorbent body, and the absorbency in the dorsal portion An absorbent article comprising a pair of fastening members fixed to both side edges along the longitudinal direction of the main body,
The pair of fastening members includes side panels fixed to the absorbent main body so as to extend outward in the horizontal direction from side edges along the longitudinal direction of the absorbent main body, and the side panels. a fastening tape secured to the side panel so as to extend outwardly in the lateral direction from the longitudinally outer edge of the
When the absorbent main body is in the unfolded and maximum stretched state and the side panels are in the natural state, the inner ends of the side panels in the longitudinal direction and the absorbent main body are positioned relative to each of the pair of fastening members. and the intersection point P2 between the longitudinal inner end of the fastening tape and the outer edge of the side panel. An absorbent article, wherein an intersection point P3 of the straight lines V1 is positioned closer to the abdominal portion than the center of the absorbent article in the longitudinal direction. The fastening tape bisects the side panel in the longitudinal direction and overlaps the imaginary straight line V2 extending in the lateral direction in a plan view, and bisects the fastening tape in the longitudinal direction to extend in the lateral direction. The absorbent article according to claim 1, wherein the extending imaginary straight line V3 is located outside the imaginary straight line V2 in the longitudinal direction. The longitudinal length Lb of the portion of the outer edge of the side panel located inward in the longitudinal direction from the fastening tape is compared to the longitudinal length La of the overlapping portion of the fastening tape with the outer edge. 3. The absorbent article according to claim 1 or 2, which is long. 4. The absorbent according to claim 3, wherein the longitudinal length Lc of the portion of the outer edge of the side panel positioned further outward in the longitudinal direction than the fastening tape is shorter than the longitudinal length La. Goods. The absorbent article according to any one of claims 1 to 4, wherein the absorbent body includes a first core and a second core arranged on the non-skin facing side of the first core. 6. The absorbent according to claim 5, wherein the transverse length of said first core is not constant in said longitudinal direction, said first core having a maximum transverse length and a lesser minimum transverse length. Goods. 7. The absorbent article according to claim 5 or 6, wherein said intersection point P3 overlaps a portion of said first core other than the portion having the maximum lateral length. The absorbent article according to any one of claims 1 to 7, wherein the longitudinal inner edge of the fastening tape is fixed to the side panel over the entire longitudinal length of the inner edge. .

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