JP2013192848A - Disposable paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a skin trouble from a groin portion to the root of a leg by making an absorber easy to move to the front and back together with a standing gather following the movement to the front and back of the leg.SOLUTION: A disposable paper diaper 1 includes: an absorbent body 10 for which an absorber 13 surrounded by an envelope sheet 14 is interposed between a stop sheet 11 and a waterproof sheet 12 and standing gathers BS are respectively formed on both side parts on a front surface side; and an exterior sheet 20 integrally provided on the outer surface side of the absorbent body 10. For the absorber 13, the isolation part 30 of the absorber 13 is formed along a diaper longitudinal direction at an intermediate part in a diaper width direction, which is a part corresponding to at least a crotch part of a wearer. Respectively for the top sheet 11, the waterproof sheet 12, the envelope sheet 14 and the exterior sheet 20, a stretchable means to be stretchable by receiving external force is executed at least to an area corresponding to the isolation part 30.

Description

  The present invention relates to a disposable paper diaper that follows a back-and-forth movement of a leg so that an absorbent body can easily move in the front-rear direction together with a three-dimensional gather.

  Conventionally, at least a liquid-permeable top sheet disposed on the front surface side, a liquid-impermeable back sheet disposed on the back surface side, an absorbent body interposed between these two sheets, and both sides on the front surface side A disposable paper diaper is known in which an article main body is configured by a three-dimensional gather formed in a section, and excrement is absorbed and held by an absorbent body via a top sheet.

  Many improvements have been made to such an absorbent article, and products have been developed that can better follow the deformation caused by the wearer's movement. For example, in the following Patent Document 1, a plurality of absorbing portions are separated from each other and joined to a base sheet via a fixing portion, and the fixing portion is included in the region of the absorbing portion in a plan view. An absorptive article provided with an absorber arranged so that an absorption part can be in fluid communication mutually is indicated.

JP 2010-268919 A

  However, in the absorbent article described in Patent Document 1, the deformability of the absorbent body is improved by configuring the absorbent article as a set of a large number of small absorbent parts independent as the absorbent body, and the body suitability and the motion followability are improved. However, the relationship with solid gathers is not shown.

  That is, in disposable disposable diapers, in order to prevent side leakage, such as urine, it is necessary to secure the close contact with the skin by pressing the free end of the three-dimensional gather against the skin side. There was often a problem that caused skin troubles by rubbing the base of the legs. In particular, infants who have grown up until they can walk firmly, the distance between the kneecaps of both legs is less than or approximately equal to the width of the pelvis, and the base of the legs can be pressed against both sides of the disposable paper diaper, Since the legs move violently with a wide range of motion, such as walking and running, the deformation of the three-dimensional gather itself can not follow, and the rigidity of the absorber prevents the deformation of the three-dimensional gather, Rub between the skin.

  In addition, the buttocks are areas where the excrement adheres and sweat easily accumulates, and this stuffiness may cause the skin to swell. It was easy for skin troubles such as to occur.

  Therefore, the main problem of the present invention is to provide a disposable paper diaper that prevents the skin trouble from the buttocks to the base of the leg by following the movement of the leg back and forth and making the absorbent body move forward and backward together with the three-dimensional gather. There is.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent body surrounded by a covering sheet is interposed between a liquid-permeable top sheet and a waterproof sheet, and both side portions on the surface side In a disposable paper diaper comprising an absorbent main body in which a three-dimensional gather is formed on each of the two and an exterior sheet integrally provided on the outer surface side of the absorbent main body,
The absorbent body is a part corresponding to at least the crotch part of the wearer, and a separation part of the absorbent body is formed in the middle part of the diaper width direction along the diaper longitudinal direction,
Each of the top sheet, the waterproof sheet, the covering sheet, and the exterior sheet is provided with a stretchable means that can be stretched by receiving an external force in at least a region corresponding to the separation portion. A disposable paper diaper is provided.

  In the invention according to claim 1, the absorber is a portion corresponding to at least the crotch portion of the wearer, and the separation portion of the absorber is provided along the longitudinal direction of the diaper at a middle portion in the diaper width direction. In addition to forming, each of the top sheet, the waterproof sheet, the covering sheet, and the exterior sheet is provided with a stretchable means that can be stretched by receiving an external force at least in a region corresponding to the separation portion. . For this reason, when a three-dimensional gather that is in close contact with the base of the leg is moved by the movement of the leg, an external force is applied to the absorbent body located on both sides of the separation part, and is arranged in a region corresponding to the separation part. The extension enabling means applied to each sheet material extends to follow the movement of the three-dimensional gather, and the absorber can easily move. In this way, as a result of the movement of the three-dimensional gather and the absorber following the movement of the leg, the surface of the three-dimensional gather can be maintained in close contact with the base of the leg, and skin troubles caused by rubbing between the three-dimensional gather surface and the skin can be prevented. become able to.

  In particular, the resistance force when the absorbers located on both sides of the separation portion move in the front-rear direction against the frictional force between the surface of the three-dimensional gather and the skin caused by the pressure force applied to the base of the three-dimensional gather leg. When the legs are small, the absorbent body moves back and forth following the movement of the 3D gather before the surface of the 3D gather and the skin rubs when the legs are moved back and forth. Rub is reliably suppressed, and skin troubles can be further prevented.

  According to a second aspect of the present invention, there is provided the disposable paper diaper according to the first aspect, wherein the stretchable means is formed by forming each sheet material into a concavo-convex shape that is concavo-convex on the front side and the back side of the diaper. Is done.

  The invention according to claim 2 is a specific form example of the extension enabling means, and each sheet material is formed in a concavo-convex shape which is uneven on the front side and the back side of the diaper. By forming such an uneven shape, when the absorber located on both sides of the separation portion receives an external force, the unevenness of each sheet material is stretched and the absorbers on both sides are easily moved. In order to form an uneven shape, it is formed in a wave shape that is alternately folded back on the front side and the back side with respect to the diaper width direction, or alternately protrudes toward the front side and the back side with respect to the diaper width direction and the longitudinal direction. It can be provided with projecting embossing.

  According to a third aspect of the present invention, there is provided the disposable paper diaper according to any one of the first and second aspects, wherein the stretchable means is formed by forming each sheet material with a stretchable material. The

  The invention described in claim 3 is another example of the extension enabling means, and each sheet material is made of a stretchable material. By using the stretchable material, the absorber can be smoothly moved and the appearance can be refreshed. In addition, after making each sheet | seat material into a stretchable material and forming in uneven | corrugated shape, an absorber becomes still easier to move.

  As the present invention according to claim 4, there is provided the disposable paper diaper according to any one of claims 1 to 3, wherein the stretchable means is applied over the entire width in the diaper width direction.

  In the invention described in claim 4, in order to move the absorber located on both sides of the separation portion, it is sufficient to provide the stretchable means in the region corresponding to the separation portion of each sheet material. In addition to smooth movement, the stretchable means can be provided over the entire width in the diaper width direction in consideration of the workability of the stretchable means.

  As a fifth aspect of the present invention, a hydrophilic second sheet is interposed between the top sheet and the absorbent body, and the extension enabling means is applied to at least a region corresponding to the separation portion of the second sheet. A disposable paper diaper according to any one of claims 1 to 4 is provided.

  In the invention described in claim 5, when a hydrophilic second sheet is interposed between the top sheet and the absorbent body in order to enhance the absorption effect of body fluid, the second sheet is provided with a means for making it extendable. ing.

  As the present invention according to claim 6, there is provided a disposable paper diaper according to any one of claims 1 to 5, wherein a superabsorbent polymer is disposed in the separating portion.

  In the invention according to the sixth aspect, since the absorber does not intervene in the separation portion, the body fluid absorption effect is lowered. Therefore, the superabsorbent polymer is disposed in the separation portion. In particular, when each sheet material is formed in a concavo-convex shape as a stretchable means, it is preferable to dispose a superabsorbent polymer in this portion because body fluid tends to stay in a portion that protrudes toward the back side.

  Disposal according to any one of claims 1 to 6, wherein as the present invention according to claim 7, on the front side and the rear side of the separation part, a buffer part in which the absorber is not interposed is provided across the diaper width direction. Paper diapers are provided.

  In the invention according to claim 7, the separation portion is provided only in a portion corresponding to the wearer's crotch portion, and an absorbent body in which no separation portion is formed is disposed in the front and rear waist regions. The front side and the rear side of the separation part are defined such that when the absorbers located on both sides of the separation part move in the front-rear direction due to the back-and-forth movement of the legs, the movement is not hindered by the absorber in the waist area. In addition, a buffer portion in which the absorber is not interposed is provided in the diaper width direction.

As the present invention according to claim 8, the extension enabling means is configured by being formed in an uneven shape on the diaper front side and the back side over the entire width of the diaper width direction,
The height of the unevenness | corrugation formed in the area | region corresponding to the said separation part is formed relatively higher than the height of the unevenness | corrugation formed in the area | region where the said absorber interposes. The disposable paper diaper described in 1. is provided.

  In the invention according to claim 8, when the sheet material is formed in a concavo-convex shape over the entire width of the diaper as the stretchable means, the separation portion is more than the height of the concavo-convex formed in the region where the absorber is interposed. The height of the unevenness formed in the region corresponding to is formed relatively high. As described above, the portion of each sheet material straddling the separation part greatly contributes to the movement of the absorber, so that the amount of movement by which the unevenness is extended when external force is applied by increasing the height of the unevenness of this part is sufficient. It is intended to ensure.

  As the present invention according to claim 9, there is provided the disposable paper diaper according to any one of claims 1 to 8, wherein the separation portion is provided at two or more locations at an interval in the middle portion of the absorbent body in the diaper width direction. Is done.

  In the invention according to the ninth aspect, the separation portion is provided at two or more places at an interval in the middle portion of the absorbent body in the diaper width direction. That is, the absorber is divided into three or more in the diaper width direction. As a result, a sufficient amount of movement of the absorbent bodies on both sides can be secured, and the body fluid absorbing effect can be improved because the absorbent body is also interposed in the central part in the diaper width direction.

  As described above, according to the present invention, there is provided a disposable paper diaper that prevents the skin trouble from the buttocks to the base of the leg by following the movement of the front and back of the leg and making the absorber easily move back and forth together with the three-dimensional gather. Can be provided.

It is a partial fracture development view of disposable paper diaper 1 concerning the present invention. It is the II-II arrow directional view (cross-sectional view). It is a schematic diagram which shows the state of the force of solid gather BS and the absorber 13. FIG. It is a perspective view of the sheet | seat material which shows an uneven | corrugated extension | extension enabling means. It is a cross-sectional view of the disposable paper diaper 1 which concerns on the other form example. It is a cross-sectional view showing the arrangement pattern of the covering sheet 14. It is a cross-sectional view of the disposable paper diaper 1 which concerns on the other form example. It is an expanded view of the disposable paper diaper 1 which concerns on the other form example. It is a cross-sectional view of the disposable paper diaper 1 which concerns on the other form example. It is a cross-sectional view of the disposable paper diaper 1 which concerns on the other form example. It is a cross-sectional view of the disposable paper diaper 1 which concerns on the other form example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the disposable paper diaper 1 (hereinafter, also simply referred to as a diaper) is provided between a liquid-permeable top sheet 11 made of a nonwoven fabric and a waterproof sheet 12 made of polyethylene or the like. Absorption in which absorbent bodies 13 such as cotton-like pulp surrounded by a covering sheet 14 made of nonwoven fabric or crepe paper are interposed, and three-dimensional gathers BS and BS standing on the skin side are formed on both sides of the surface side. The main body 10 and the outer sheet 20 integrally provided on the outer surface side of the absorbent main body 10, and the front body and the rear body of the outer sheet 20 are overlapped at the center of the diaper in the product state. The pants-type diaper has a structure in which a waist opening 23 and a pair of left and right leg openings 29 are formed by joining at joining edges 21 and 22 at both ends.

  Hereinafter, the structure of the disposable paper diaper 1 will be described in detail.

(Structure of the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail with reference to FIGS. 1 and 2.

  As described above, the absorbent main body 10 is an absorbent body such as cotton-like pulp surrounded by the covering sheet 14 between the liquid-permeable top sheet 11 made of nonwoven fabric or the like and the waterproof sheet 12 made of polyethylene or the like. 13 is interposed to absorb and retain body fluids.

  In the illustrated example, the absorbent body 13 is formed with a substantially square shape in plan view, and the width dimension thereof is a dimension width that does not give the wearer a feeling of gore by hitting the crotch portion. The absorbent body 13 is surrounded by a covering sheet 14 in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable top sheet 11. As the absorber 13, it is desirable to use an airlaid absorber that can reduce the bulk. The absorber 13 is formed with a separation portion 30 of the absorber 13 in which the absorber 13 is not interposed at a predetermined portion, which will be described in detail later.

  As the liquid-permeable top sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid-permeable top sheet 11 extends to the back side of the absorbent body 13 around the side edge of the absorbent body 13.

  As the waterproof sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impervious plastic sheet such as polyethylene or polypropylene is used, but in recent years, it has moisture permeability from the viewpoint of preventing stuffiness. Are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

  As the covering sheet 14 surrounding the absorbent body 13, a crepe paper, a hydrophilic nonwoven fabric, or the like can be passed through the body fluid or the like without inhibiting the body fluid absorption into the absorbent body 13, and the absorbent body 13 can be prevented from collapsing. Any sheet that retains its shape may be used. As the covering sheet 14, a porous sheet in which a large number of apertures are formed can be used in addition to the non-porous sheet.

  On the other hand, as shown in FIG. 2, the gathered nonwoven fabric 15 that forms the three-dimensional gathered BS is a nonwoven fabric made into a double sheet by folding, and the side of the absorbent body 13 that is wound by the liquid-permeable topsheet 11. The edge portion is further wound up from the upper side thereof, extends to the back surface side of the absorber 13, and is bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the middle portion in the longitudinal direction of the paper diaper, and a range from the middle portion in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the front and rear end portions in the longitudinal direction, the section from the intermediate portion in the width direction to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and the portion forming the three-dimensional gather BS is the absorber. While being folded at the upper surface portion of 13, it is bonded by a hot melt adhesive or the like.

  In the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, a plurality of thread-like elastic members 16, 16... At the standing tip side portion and thread-like elastic elastic members 17, 17 at the standing base end portion and the middle portion, respectively. Are arranged. As shown in FIG. 2, the thread-like elastic members 16, 16... Form a three-dimensional gather BS by erecting a non-woven fabric portion protruding from the absorber side edge by an elastic stretching force. It is for pressing the surface against the skin side. Moreover, the waterproof sheet 18 for gathers is arrange | positioned inside the double sheet | seat, and the whole whole three-dimensional gather BS comprises the leak-proof wall.

  As the waterproof sheet 12, it is desirable to use an opaque sheet so as not to cause browning such as defecation and urine. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used. The waterproof sheet 12 is provided separately from the gathering waterproof sheet 18, but both sides of the waterproof sheet 12 enter the inside of the double sheet-like gathered nonwoven fabric 15 to be integrated with the gathered waterproof sheet 18. You may make it comprise.

  As the thread-like elastic members 16 and 17, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like that are usually used can be used. . Further, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation is 150 to 350% (the elongation is 100% from the natural state), and the interval is 7.0 mm or less. In place of the thread-like elastic member, a tape-like elastic member having a certain width may be used.

  In the same manner as the liquid-permeable top sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, regenerated fibers such as rayon or cupra, Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a non-woven fabric with a low basis weight and excellent air permeability. Further, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to improve the feel to the skin (dry feeling), a silicon-based, paraffin-metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

  Further, a second sheet 19 made of a hydrophilic nonwoven fabric may be interposed between the liquid-permeable top sheet 11 and the absorbent body 13. The second sheet 19 can be a non-porous sheet or a porous sheet in which a large number of apertures are formed. As the hydrophilic nonwoven fabric, recycled fibers such as rayon and cupra, natural fibers such as cotton are used, or the material itself has hydrophilicity, or olefins such as polyethylene or polypropylene, polyesters, polyamides, etc. A synthetic fiber having a hydrophilic property can be suitably used by using a fiber that has been subjected to a surface treatment with a hydrophilizing agent to impart a hydrophilic property.

  Each of the liquid-permeable top sheet 11, the waterproof sheet 12, the covering sheet 14, and the second sheet 19 is provided with a stretchable means in a predetermined area, which will be described in detail later.

(Structure of exterior sheet 20)
As shown in FIG. 1, the exterior sheet 20 is a two-layer nonwoven fabric sheet composed of an upper nonwoven fabric 20A and a lower nonwoven fabric 20B, and various elastic members 24, 25 are provided between the upper nonwoven fabric 20A and the lower nonwoven fabric 20B. Arranged and stretchable. As for the planar shape, concave notches are formed in order to form leg openings 29 on both sides of the middle, forming a pseudo hourglass shape as a whole.

  In the exterior sheet 20 according to the present invention, as the elastic member, as shown in FIG. 1, the waist elastic members 24, 24... Arranged in the waist opening 23, the front body F and the back body B , And a plurality of waist elastic members 25, 25... Arranged along the horizontal direction at intervals in the vertical direction.

  The exterior sheet 20 is provided with a stretchable means at least in a predetermined area, which will be described in detail later.

(About the separating part 30 and the extension enabling means of the absorber 13)
The absorbent body 13 corresponds to at least the crotch part of the wearer, and is located in the middle part of the diaper width direction, in the illustrated example in the center part of the diaper width direction, along the diaper longitudinal direction. The separation portion 30 is formed. That is, as shown in FIG. 2, in the cross-sectional view of the crotch part, both sides in the width direction are the two side areas A and A where the absorber 13 is interposed, and the center part in the width direction is a separation part where the absorber 13 is not interposed Region B. As shown in FIG. 1, the separation portion 30 of the absorbent body 13 is preferably formed over the entire length of the absorbent body 13 in the longitudinal direction of the diaper. It can also be formed in a range (see FIG. 6).

  The “part corresponding to the crotch portion of the wearer” is a range substantially equivalent to a range where the solid gather BS stands on the skin side by the stretching force of the thread-like elastic member 16, This is the range that includes at least the lower half.

  In addition, as shown in FIG. 2, the liquid-permeable top sheet 11, the waterproof sheet 12, the covering sheet 14, the second sheet 19, and the exterior sheet 20 are each at least a region corresponding to the separation part 30 (separation part 30. The region that overlaps with each other) is provided with a stretchable means that can be stretched by receiving an external force.

  By applying the stretchable means to the region corresponding to the separation portion 30 of each sheet material, when the three-dimensional gather BS that is in close contact with the base portion of the leg is moved by the movement of the leg, An external force acts on the absorber 13 positioned, and the extension enabling means of each sheet material expands so that the absorber 13 can easily move following the movement of the three-dimensional gather BS. In this way, as a result of the movement of the three-dimensional gather BS and the absorber 13 following the movement of the legs, the surface of the three-dimensional gather BS can be maintained in close contact with the base of the legs, and the surface of the three-dimensional gather BS and the skin are rubbed. Prevents skin troubles.

  In particular, as shown in FIG. 3, the absorption force located on both sides of the separation portion 30 with respect to the frictional force μN between the surface of the three-dimensional gather BS and the skin caused by the pressure N applied to the base of the leg of the three-dimensional gather BS. In the case where the resistance T when the body 13 moves in the front-rear direction is configured to be smaller, the surface of the three-dimensional gather BS before the rubbing between the surface of the three-dimensional gather BS and the skin occurs when the legs are moved back and forth. Since the absorbent body 13 moves back and forth following the movement, the friction between the skin and the three-dimensional gather BS is reliably suppressed, and skin troubles can be further prevented.

  As shown in FIG. 2, the stretchable means can be configured by forming each sheet material in a concavo-convex shape that is concavo-convex on the diaper surface side and the back surface side. In order to form such a concavo-convex shape, as shown in FIG. 4 (A), it is alternately folded on the front side and the back side with respect to the diaper width direction, or on the front side and the back side with respect to the diaper width direction. As shown in FIG. 4 (B), a plurality of groove-shaped embosses along the longitudinal direction of the diaper are formed so as to alternately project toward the diaper width direction and longitudinal direction. For example, protruding embosses protruding alternately toward the front side and the back side may be formed. The former wave-shaped one extends in the diaper width direction by receiving an external force, and by securing a separation distance between the absorbers 13 on both sides, the absorbers 13 on both sides can move back and forth. I am doing so. In addition, the latter having a protruding embossing is one in which each sheet material can be stretched in the diaper width direction and the diaper longitudinal direction by receiving an external force. Easy to move to.

  In FIG. 2, the extension enabling means is applied over the entire width in the diaper width direction. However, as shown in FIG. Therefore, the extension enabling means may be applied only to the separation region B corresponding to the separation portion 30 so that the both side regions A where the absorber 13 is interposed are formed in a planar shape.

  In the part to which the extension enabling means is applied, the sheet materials are bonded to each other by applying an adhesive such as hot melt to the projecting top portions. In curtain coating or slot (solid) coating, the unevenness of each sheet material is crushed and the absorber 13 does not move.

  As an arrangement pattern of the covering sheet 14 with respect to the absorbent body 13, as shown in FIG. 2, by covering the absorbent bodies 13 and 13 on both sides integrally with the covering sheet 14 from the front surface side and the back surface side, A double sheet structure in which the encapsulating sheets 14 and 14 are joined to each other at the separation portion 30 may be used, but as shown in FIG. 6, they can be arranged in various forms. As shown in FIG. 6 (A), the absorbent bodies 13 and 13 on both sides are respectively surrounded by the covering sheet 14 and then bonded to the base sheet material 14a by an adhesive, heat sealing, ultrasonic bonding or the like. You may make it do. Further, as shown in FIG. 6 (B), either one of the front side sheet or the rear side cover sheet 14 is integrally disposed on the absorbent bodies 13 on both sides, and the other cover sheet 14 is provided. May be individually arranged on the absorbers 13 on both sides. In the arrangement patterns shown in FIGS. 6A and 6B, since the covering sheet 14 arranged in the separation portion 30 is single, it is easily stretched when receiving an external force.

  On the other hand, since the absorber 30 does not interpose the separation part 30, there exists a problem that the bodily fluid absorption effect of this part falls. In particular, when each sheet material is formed in a concavo-convex shape as the extension enabling means as described above, there is also a problem that body fluid tends to stay in a portion that is convex toward the back side. For this reason, as shown in FIG. 7, it is preferable to dispose a superabsorbent polymer 31 (SAP) in the separation portion 30 in order to supplement body fluid absorption. In the illustrated example, the superabsorbent polymer 31 is disposed in the concave portion on the surface side of the covering sheet 14. As a result, the body fluid that has passed through the liquid-permeable top sheet 11 and the second sheet 19 and stayed on the covering sheet 14 can be captured.

  As shown in FIG. 8, the separating portion 30 extends to a portion corresponding to a predetermined crotch portion with respect to the longitudinal direction of the diaper, and the separating portion is not formed in the front and rear waist regions. Is preferably provided on the front side and the rear side of the separation part 30 with a buffer part 32 in which the absorber 13 is not interposed across the diaper width direction. When the absorber 13 located on both sides of the separation portion 30 moves in the front-rear direction due to the back-and-forth movement of the leg, the movement is not inhibited by the absorber 13 in the waist region.

As shown in FIG. 9, when the stretchable means in which each sheet material is formed into a concavo-convex shape is formed over the entire width in the diaper width direction, the concavo-convex formed in both side areas A, A where the absorber 13 is interposed than the height H _a of, it is preferable that the direction of the height H _B of the concavo-convex formed on the spacing part region B is formed so that relatively high (H a _{<H B).} As described above, since the portion corresponding to the separation portion 30 of each sheet material greatly contributes to the movement of the absorber 13, the unevenness is extended when the height of the unevenness of this portion is increased and external force is applied. A sufficient amount of movement is secured.

[Other examples]
(1) In the above embodiment, each sheet material is formed as an uneven shape on the front and back sides of the diaper as the extension enabling means. However, as shown in FIG. You may comprise by forming a material with the raw material which has a stretching property. In this case, what is necessary is just to comprise at least the part corresponding to the separation part among each sheet material with an elastic material. Moreover, as shown in FIG. 10, a material made of a stretchable material and a material formed in an uneven shape may be mixed. In the example of illustration, the liquid-permeable top sheet 11, the covering sheet | seat 14, and the exterior sheet | seat 20 are comprised with an elastic material, and the 2nd sheet | seat 19 and the waterproof sheet 12 are formed in uneven | corrugated shape. By using the stretchable material, the absorber 13 can be moved smoothly and the appearance is flat and clear. Furthermore, if each sheet material is made of a stretchable material and then formed into the above-described irregular shape, the extensibility becomes even better.

  As the stretchable material, specifically, a non-woven fabric composed of long fibers made of an elastic resin material that is easily reversibly plastically deformed, such as polyurethane, or the fiber diameter of the fiber itself does not change when stretched. A non-woven fabric or the like that exhibits stretchability by forming a zigzag or spiral crimp and stretching the crimp can be used.

(2) In the above embodiment, one separating portion 30 of the absorbent body 13 is provided at the substantially central portion in the diaper width direction, and the absorbent body 13 is divided into two on both sides, but is shown in FIG. Thus, the absorber 13 may be divided into three or more in the diaper width direction by providing two or more separation portions 30 at intervals in the middle portion of the absorber 13 in the diaper width direction. As a result, a sufficient amount of movement of the absorbent bodies 13 on both sides can be secured, and an improvement in the body fluid absorption effect can be expected because the absorbent body 13 is also interposed in the central part in the diaper width direction.

  DESCRIPTION OF SYMBOLS 1 ... Disposable paper diaper, 10 ... Absorbent main body, 11 ... Liquid-permeable top sheet, 12 ... Waterproof sheet, 13 ... Absorbent body, 14 ... Cover sheet, 15 ... Gathered nonwoven fabric, 16.17 ... String-like elastic elastic member, 18 ... tarpaulin for gathers, 19 ... second sheet, 20 ... exterior sheet, 30 ... separation part, 31 ... super absorbent polymer, 32 ... buffer part

Claims (9)

An absorbent main body in which an absorbent body surrounded by a covering sheet is interposed between a liquid-permeable top sheet and a waterproof sheet, and three-dimensional gathers are formed on both sides of the surface side. In a disposable paper diaper provided with an exterior sheet integrally provided on the outer surface side of the main body,
The absorbent body is a part corresponding to at least the crotch part of the wearer, and a separation part of the absorbent body is formed in the middle part of the diaper width direction along the diaper longitudinal direction,
Each of the top sheet, the waterproof sheet, the covering sheet, and the exterior sheet is provided with a stretchable means that can be stretched by receiving an external force in at least a region corresponding to the separation portion. Disposable paper diapers.   The disposable paper diaper according to claim 1, wherein the stretchable means is configured such that each sheet material is formed in a concavo-convex shape that is concavo-convex on the front side and the back side of the diaper.   The disposable paper diaper according to claim 1, wherein the stretchable means is configured by forming each sheet material with a stretchable material.   The disposable paper diaper according to any one of claims 1 to 3, wherein the stretchable means is applied over the entire width in the diaper width direction.   The hydrophilic second sheet is interposed between the top sheet and the absorber, and the stretchable means is applied to at least a region corresponding to the separation portion of the second sheet. Disposable disposable diapers as described in 1.   The disposable paper diaper according to any one of claims 1 to 5, wherein a superabsorbent polymer is disposed in the separation portion.   The disposable paper diaper according to any one of claims 1 to 6, wherein a buffer portion in which the absorber is not interposed is provided across the diaper width direction on the front side and the rear side of the separation portion. The stretchable means is configured by being formed in a concavo-convex shape that is concavo-convex on the diaper front side and back side over the entire width in the diaper width direction,
The height of the unevenness | corrugation formed in the area | region corresponding to the said separation part is formed relatively higher than the height of the unevenness | corrugation formed in the area | region where the said absorber interposes. Disposable disposable diapers as described in 1.   The disposable paper diaper according to any one of claims 1 to 8, wherein the separation portion is provided at two or more locations at an interval in an intermediate portion of the absorbent body in the diaper width direction.

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