JP6551841B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper, and more particularly to a disposable diaper in which an absorbent body of an interior body is partitioned into a plurality of parts to prevent leakage of excrement from the back side of the wearer.

Conventionally, in order to prevent leakage of excrement from the crotch region of the wearer, a substantially Y-shaped dividing line is provided from the body side of the interior body at a portion of the interior body facing the crotch region of the wearer. Means are known. (Patent Document 1)
In addition, in order to prevent the leakage of excrement by deforming the absorbent body into a three-dimensional shape according to the gender of the wearer, means for partitioning the absorbent body of the interior body into a plurality of parts is known. There is. (Patent Document 2)

JP, 2008-183160, A Unexamined-Japanese-Patent No. 2004-49507

  However, in the means disclosed in Patent Document 1, leakage of excrement from the vicinity of the wearer's crotch can be prevented. For example, the left and right buttocks that deform when the wearer walks and the back side of the absorber There is a possibility that a clearance may be generated between the two and the excrement may leak to the outside from the back of the wearer.

  In the means disclosed in Patent Document 2, it is possible to improve the fit between the wearer and the absorbent body by deforming the absorbent body into a three-dimensional shape according to the gender of the wearer. The shape of the back side of the sacrum and the absorbent body is different, and the back part of the wearer and the back side part of the absorbent body cannot be brought into close contact with each other, and excrement may leak out from the back part of the wearer.

  Therefore, the main problem of the present invention is to make the inner body absorbent closely contact the wearer's sacrum, and to follow the deformation of the wearer's left and right hips, and to make the inner body absorbent closely contact the left and right hips, An object of the present invention is to provide a disposable diaper which prevents the leakage of excrement from the back of the patient.

The present invention that has solved the above problems is as follows.
The invention which concerns on Claim 1 is the disposable diaper which fixed the interior body to the exterior body and the inner surface of the said exterior body,
The interior body includes a liquid-permeable surface sheet provided on the body surface side, a liquid-impermeable sheet provided on the non-body side, and an absorption provided between the surface sheet and the liquid-impermeable sheet. formed in the body, the inner surface plan view, the absorber includes a first absorber portion located on the back side of the absorber, and a second absorber portion located on the ventral side of the absorber, the other side in the width direction between the third absorbent portion and said first absorbent portion and a second absorber portion located on one side in the width direction between the first absorbent body and the second absorbent portion is partitioned into fourth absorber body located, fixing the first absorber section and the outer body, fixed to the second absorber section and the outer body, a non-secure said third absorbent portion and the outer member and then, the fourth absorber body and the outer body as a non-fixed, said first absorber portion to form the substantially inverted triangular shape, the base of the first absorbent body, the back of the absorber It is located at the end, the top of the first absorbent body part is the central part in the width direction of the absorbent body, and the first side from the back side that divides the exterior body in the absorbent body into four in the front-rear direction The second absorber portion is formed in a substantially rectangular shape, the ventral side of the second absorber portion is positioned at the ventral end of the absorber, and the second absorber portion is positioned on one imaginary line. The side on the back side of the absorber portion is positioned on the second imaginary line that is second from the back side, which divides the exterior body of the absorber in the front-back direction, and the first absorber portion and the third absorber portion Of the first absorber portion and the fourth absorber portion are divided by the second partition line, and the third absorber portion and the fourth absorber portion are opposed to each other. The part is divided by a third lane line, and the first lane line, the second lane line, and the third lane line are slit lines having a predetermined interval, and the slit line Is a disposable diaper, characterized in that the formation of the width 5 to 20 mm.

According to a second aspect of the present invention, the third absorber portion is adjacent to the third absorber rear portion formed in a substantially inverted triangle shape close to the first absorber portion and the fourth absorber portion . A fourth absorber portion formed at a front portion of a third absorber portion formed in a substantially rectangular shape, and a fourth absorber portion rear portion formed in a substantially inverted triangle shape close to the first absorber portion ; The disposable diaper according to claim 1 , wherein the disposable diaper is formed at a front part of a fourth absorber part formed in a substantially rectangular shape close to the third absorber part .

According to the first aspect of the present invention, the interior body includes a liquid-permeable surface sheet provided on the body surface side, a liquid-impermeable sheet provided on the non-body side, the surface sheet, and the liquid-impermeable material. forming an absorbent body provided between the sheets, the inner surface plan view, the absorber includes a first absorber portion located on the back side of the absorber, the second located on the ventral side of the absorbent body an absorber unit, and the third absorber portion located on one side in the width direction between the first absorbent portion second absorber portion, and a first absorber section width direction between the second absorber section It is divided into the 4th absorber part located in the other side, the 1st absorber part and an exterior body are fixed, the 2nd absorber part and an exterior body are fixed, and the 3rd absorber part and an exterior body are not fixed And the fourth absorbent body part and the exterior body are not fixed , the first absorbent body part is formed in a substantially inverted triangular shape, and the bottom side of the first absorbent body part is positioned at the back end of the absorbent body, First absorber Is positioned on the first first imaginary line from the back side that divides the exterior body in the absorbent body into four parts in the front-rear direction, and the second absorbent body part is substantially It is formed in a rectangular shape, and the ventral side of the second absorbent body portion is positioned at the ventral side end portion of the absorbent body, and the dorsal side of the second absorbent body portion is in the fore-and-aft direction It is located on the second second imaginary line from the dorsal side to be divided into four parts, and the opposing part of the first absorbent part and the third absorbent part is divided by the first dividing line, and the first absorbent part and the fourth absorbent body The opposing part of the part is divided by the second dividing line, the opposing part of the third absorber part and the fourth absorbent part is divided by the third dividing line, the first dividing line, the second dividing line, and the third dividing line was a slit line having a predetermined distance, so to form a width of the slit lines 5 to 20 mm, right and third absorbent portion following the deformation of the right hip of the wearer deformation Parts in contact inner portion of the third absorbent portion abuts, inner side portion of the fourth absorber body to the left hip deformed fourth absorber body to follow the deformation of the left hip of the wearer in contact with It is possible to prevent excrement from leaking out from the back of the person.

It is possible to prevent the excrement from leaking outside from the back of the wearer by bringing the first absorbent body into close contact with the sacrum of the wearer.
Further, the front part of the third absorbent body is brought into contact with the base part of the wearer's right leg, and the front part of the fourth absorbent body part is brought into contact with the base part of the wearer's left leg to excrete from the left and right legs of the wearer. An object can be prevented from leaking outside.
Furthermore, the third absorbent part and the fourth absorbent part can be efficiently erected toward the wearer's body side, and the first absorbent part can be easily brought into close contact with the sacral part of the wearer at the time of wearing. it can.

According to invention of Claim 2 , in addition to the effect by invention of Claim 1 , the 3rd absorber part was formed in the substantially inverted triangular shape which adjoins the 1st absorber part , and the 3rd absorber part was formed. The rear part and the front part of the third absorber part formed in a substantially rectangular shape close to the fourth absorber part are formed, and the fourth absorber part is formed in a substantially inverted triangle shape close to the first absorber part. Since the rear portion of the fourth absorbent body portion formed and the front portion of the fourth absorbent body portion formed in a substantially rectangular shape adjacent to the third absorbent body portion , the third absorption is applied to the deformation of the wearer's starboard portion. The body part can be further deformed and deformed, and the fourth absorbent body part can be deformed by following the deformation of the wearer's port part .

It is a perspective view of a pants type disposable diaper. It is the internal plane top view which developed the pants type disposable diaper. It is the external surface top view which developed the pants type disposable diaper. It is 3-3 sectional drawing of FIG. It is 4-4 sectional drawing of FIG. It is 5-5 cross section figure of FIG. It is the inner surface top view which expand | deployed the absorber of 1st Embodiment, and is explanatory drawing explaining the division line provided in the absorber. It is a rear view of a crotch of a wearer equipped with a pants type disposable diaper provided with an absorber of a 1st embodiment. It is explanatory drawing explaining the fixing method of the absorber right side part and the absorber left side part of the absorber of 1st Embodiment. It is the inner surface top view which expand | deployed the absorber of 2nd Embodiment, and is explanatory drawing explaining the division line provided in the absorber. It is a rear view of a crotch of a wearer equipped with a pants type disposable diaper provided with an absorber of a 2nd embodiment. It is explanatory drawing explaining the fixing method of the absorber right side part and the absorber left side part of the absorber of 2nd Embodiment.

Leakage of excrement from the dorsal side of the wearer to the outside when the absorbent body of the absorbent element is partitioned by the section lines provided on the body surface of the inner body of the present invention and the pants-type disposable diaper is worn In order to facilitate understanding of the structure that prevents the protrusion, first, the pants-type disposable diaper 100 will be described with reference to the accompanying drawings.
As shown in FIG. 1, a pants-type disposable diaper 100 is formed of an exterior body 12 that forms the outer surface of a product, and an interior body 200 that is attached to the inner surface of the exterior body 12.

<Interior body>
As shown in FIG. 2, the interior body 200 is formed in a rectangular shape in a plan view, but may be in an arbitrary shape. In this specification, the “front-rear direction” refers to the direction connecting the abdominal side and the back side, “width direction” refers to the direction orthogonal to the front-rear direction, and “up-down direction” refers to a pants-type disposable. The direction orthogonal to the waistline direction in the wearing state of the diaper 100 shall be said.

  As shown in FIGS. 4 and 5, the interior body 200 includes a surface sheet 30 on the body side, the liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. Moreover, in order to make the liquid which permeate | transmitted the surface sheet 30 transfer to the absorption element 50 rapidly, the intermediate sheet 40 is provided between the surface sheet 30 and the absorption element 50, and excrement is located on both sides of the interior body 200. In order to prevent leakage, solid gathers 60 standing on the body side are provided on both sides of the interior body 200. 4 and 5 indicate fixed portions for fixing the constituent members, and are formed by solid, bead, curtain, summit or spiral application such as hot melt adhesive.

(Front sheet)
The top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. For example, if flexibility and drape are required, the spun bond method and spun lace method require bulkiness and softness, and the air through method, point bond method and thermal bond method are preferable processing methods. .

(Intermediate sheet)
The intermediate sheet 40 can be exemplified by the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber. The basis weight is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight. Further, the intermediate sheet 40 is not an essential member and can be omitted.

(Liquid impervious sheet)
The liquid impermeable sheet 11 is not particularly limited, but for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric provided with a plastic film on the surface of the nonwoven fabric, a plastic film A laminated sheet etc. which accumulated and fixed etc. can be illustrated. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabric using microdenier fibers, reinforcement of leakproofness by reducing the voids of the fibers by applying heat and pressure, and methods of coating highly water-absorbent resin or hydrophobic resin or water repellent agent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.

(3D gather)
The three-dimensional gather 60 is formed by folding a band-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folding it into two. A waterproof sheet 64 extending from the folded portion to both sides in the width direction of the elastic stretch sheet 11 is provided, and the elongated elastic stretchable member 63 is stretched along the longitudinal direction between the folded portion and the sheets in the vicinity thereof, A plurality is fixed at intervals in the width direction. The end of the solid gather 60 opposite to the folded back portion in the width direction is a mounting portion 65 fixed to the back surface of the side edge portion of the inner body 200, and the portion other than the mounting portion 65 protrudes from the mounting portion 65 It is considered as a projecting portion 66. The folded shape of the three-dimensional gather 60 is not particularly limited, and may be other folded shapes.

The gather sheet 62 is made of a spunbonded nonwoven fabric (SS, SSS, etc.), a SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric with excellent uniformity and concealment, and water repellent with silicon or the like as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elastic elastic member 63, thread rubber or the like can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. The gather sheet 62 is not particularly limited, and other nonwoven fabrics can be used.

  2-6 are preferable and, as for the number of the elastic elastic members 63 provided in the free part of the three-dimensional gather 60, 3-5 are more preferable. The arrangement interval is suitably 3 to 10 mm. With this configuration, the skin can be easily hit in the area where the elastic stretchable member 63 is disposed. The elastic stretchable member 63 may be disposed not only on the tip side but also on the root side.

  The waterproof sheet 64 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a plastic film is provided on the surface of the nonwoven fabric, and a nonwoven fabric layered on the plastic film. It is possible to exemplify a laminated sheet fixed and fixed. The inner part in the width direction of the waterproof sheet 64 is fixed to both sides in the width direction of the liquid impermeable sheet 11 with a hot melt adhesive or the like.

(Absorbent element)
The absorbent element 50 is formed of an absorbent body 56 and a packaging sheet 58 that wraps the absorbent body 56.

(Absorber of the First Embodiment)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as needed a fiber (a fiber bundle) of synthetic fibers such as cellulose acetate in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber weight may be, for example, about 100 to 300 g / m ² in the case of stacking cotton-like pulp or short fibers, and in the case of filament aggregate, for example, about 30 to 120 g / m ^2. Can. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. In addition, crimped fibers which are uniformly crimped are often used. It is preferable that the superabsorbent polymer particles be dispersed and held in the absorbent body 56.

As shown in FIG. 7, when the wearer wears the pants-type disposable diaper 100, as shown in FIG. 7, the absorber sacral portion formed in a substantially inverted triangle shape located in the sacrum portion of the wearer (claims "A first absorbent body portion" 70, a substantially rectangular shaped absorbent body flank portion located on the front side portion in the back and forth direction of the crotch portion of the wearer and the abdomen ("second absorbent body portion" in the claims) ) and 71, and the absorber sacral section 70 and the absorber right hip located right hip of the formed wearer during absorber flank 71 ( "third absorbent portion" in the claims) 72, absorption It is divided into an absorber port part (the “fourth absorber part” in the claims) 73, which is located between the sacral part 70 and the absorbent ventral part 71 and is located on the left side of the wearer. Further, a substantially arc-shaped cutout portion 57 is formed on each of the outer side portion in the width direction of the absorber belly side portion 71 and the absorber starboard side portion 72 and the outer side portion in the width direction of the absorber belly side portion 71 and the absorber starboard starboard portion 72. Is provided to form a constricted portion.

  The bottom of the absorber sacrum portion 70 formed in a substantially inverted triangular shape is located at the back end of the absorber 56 in the front-rear direction, and as shown in FIG. When the pants-type disposable diaper 100 is worn, the outer body 12 in the absorbent body 56 is positioned in the front-rear direction so as to be positioned at the tailbone of the wearer 56 in the rear view. It is located in the vicinity of the first virtual line 59A divided into four. In addition, the absorbent sacrum 70 is wrapped with the packaging sheet 58 and further wrapped with the surface sheet 30 from the outside of the packaging sheet 58, and the anti-body surface of the surface sheet 30 is fixed to the body surface of the exterior body 12. . In order to securely fix the topsheet 30 to the exterior body 12, it is preferable to fix 30% or more of the uniformly distributed portions of the topsheet 30 on the non-body surface.

  An abdominal side in the front-rear direction of the absorber ventral side portion 71 formed in a substantially rectangular shape is located at a ventral end portion in the front-rear direction of the absorber 56, and a dorsal side in the front-rear direction of the absorber ventral side portion 71. When the pants type disposable diaper 100 is worn by the wearer, the second virtual section that divides the exterior body 12 in the absorbent body 56 into four in the front-rear direction so as to be located on the back side of the crotch portion of the wearer. It is located near line 59B. Further, the absorbent belly side portion 71 is wrapped with the packaging sheet 58 together with the absorbent starboard portion 72 and the absorbent portside portion 73, and further wrapped with the topsheet 30 from the outside of the packaging sheet 58, and the absorbent belly on the topsheet 30. The opposite body surface of the portion opposite to the side portion 71 is fixed to the body surface of the exterior body 12. In order to securely fix the topsheet 30 to the exterior body 12, it is preferable to fix 30% or more of the uniformly distributed portions of the topsheet 30 on the non-body surface. The third imaginary line 59 </ b> C that divides the exterior body 12 in the absorber 56 into four in the front-rear direction is located on the ventral side of the notch 57 of the absorber abdominal side 71.

The absorbent right buttock portion 72 is formed in a substantially inverted triangle shape adjacent to the side portion in the width direction of the absorbent sacral portion 70 ("third absorbent portion back" in the claims) 72A, and the right buttock portion It is formed from a substantially rectangular starboard front portion 72B located between the rear portion 72A and the absorber ventral side portion 71. Further, the absorber starboard portion 72 is wrapped with the packaging sheet 58 together with the absorber ventral side portion 71 and the absorber portside portion 73, and is further wrapped with the topsheet 30 from the outside of the packaging sheet 58. As shown in FIG. 9, the opposite body surface of the surface sheet 30 that faces the starboard rear portion 72 </ b> A is not fixed to the body surface of the exterior body 12. Starboard front part ( front part of third absorber part) in top sheet 30 (first absorber part front part of claim) First virtual line 81A that divides starboard part front part 72B on the opposite body surface of the part facing 72B into three equal parts in the width direction The central region 82A divided by the second virtual line 81B is fixed to the body surface of the exterior body 12, and the right region 82B adjacent to the outer side of the central region 82A and the left region 82C adjacent to the inner side of the central region 82A are It is not fixed to the body surface of the exterior body 12. Further, the central region 82A can be unfixed to the body surface of the exterior body 12. In addition, along the widthwise inner side of the starboard rear portion 72A and the starboard front portion 72B, a thin elastic elastic member having a thickness of 470 to 1240 dtex and an elongation rate of 150 to 350% at the time of fixation is provided. You can also.

The absorber left buttock portion 73 is formed in a substantially inverted triangle shape adjacent to the side in the width direction of the absorber sacral portion 70 ("fourth absorber back portion" in the claims) 73A, and the left buttock portion It is formed from a substantially rectangular port part front part 73B located between the rear part 73A and the absorber ventral part 71. Further, the absorbent port part 73 is wrapped with the packaging sheet 58 together with the absorbent ventral side part 71 and the absorbent starboard part 72, and is further wrapped with the top sheet 30 from the outside of the packaging sheet 58. As shown in FIG. 9, the opposite body surface of the surface sheet 30 that faces the port side rear portion 73 </ b> A is not fixed to the body surface of the exterior body 12. Portion front part on top sheet 30 ("fourth absorber part front part" in claims) First virtual line 83A that equally divides port part front part 73B on the opposite side of the part opposite to 73B in the width direction into three equal parts The central region 84A divided by the second virtual line 83B is fixed to the body surface of the exterior body 12, and the left region 84B adjacent to the outer side of the central region 84A and the right region 82C adjacent to the inner side of the central region 84A are It is not fixed to the body surface of the exterior body 12. Further, the central region 84A can be unfixed to the body surface of the exterior body 12. In addition, a thin elastic elastic member having a thickness of 470 to 1240 dtex and an expansion ratio of 150 to 350% at the time of fixing may be provided along the inner side in the width direction of the port rear portion 73A and port front portion 73B. You can also. An elongated elastic elastic member having a predetermined elongation rate can also be provided.

A section line extending downward from the one side in the width direction of the base of the absorber sacral portion 70 toward the apex to the right (the “second 1) A division line 75 ) , the absorber sacral region 70 and the port rear portion 73A of the absorber left arm portion 73 extend from the other side in the width direction of the base of the absorber sacral member 70 to the left toward the apex The right front part 72B of the right absorbent part 72 and the left front part 73B of the left absorbent part 73, which are divided by the existing dividing line 76 (the “second reference line” in the claims) 76, Is defined by a lane line 77 that extends straight toward the back side of the absorber ventral side portion 71 (“third lane line” in the claims) . The partition line 77 preferably extends from the top of the absorber sacrum 70 beyond the second imaginary line 59B that is the center in the front-rear direction of the exterior body 12 of the absorber 56.

  The dividing line 75 is a slit line having a predetermined interval that separates the absorber sacrum 70 and the starboard posterior part 72A of the absorber starboard part 72, and separates the dividing line 76 from the absorber sacrum part 70. A slit line having a predetermined interval is formed by dividing the port side rear part 73A of the body port part 73 into separate bodies, and the partition line 77 is a left side of the starboard front part 72B of the absorber starboard part 72 and the absorber port part 73. It is preferable to divide the buttocks front part 73B into a slit line having a predetermined interval to be separated, so that when the wearer wears the pants-type disposable diaper 100, the sacrum of the wearer The absorber sacrum 70 comes into close contact, and the absorber starboard 72 easily stands up with the movement of the wearer, so that the absorber starboard 72 comes into close contact with the wearer's starboard, and the wearer moves. Absorber left side 73 easily stands up Absorber left hip 73 in close contact with the left hip of the wearer, it is possible to prevent the leakage to the outside from the back side portion of the pants-type disposable diaper 100 of the excrement of the wearer. Moreover, the absorber abdomen side part 71 closely_contact | adheres to a wearer's abdomen, and it can prevent the leakage to the exterior from the abdomen side part of the pants type disposable diaper 100 of a wearer's excrement. The width of the dividing lines 75 to 77 is preferably 5 to 20 mm. If the width of the lane line 75 or the like is less than 5 mm, the lane line may be crushed during manufacturing, and if the width of the lane line 75 or the like exceeds 20 mm, excrement may stay in the lane line 75 or the like. is there. In addition, the widths of the dividing lines 75 and the like can be different between the body surface side and the opposite body surface side.

  In addition, the lane markings 75 and the like are not limited to slit lines, and can be easily folded on the lane markings 75 formed with embossing or the like and with a reduced amount of area of the portion facing the lane markings 75. It can also be a fold line. Thereby, without being restrained by the absorber sacrum part 70 fixed to the body surface of the exterior body 12, the starboard part rear part 72A of the absorber starboard part 72 can stand up toward the wearer's starboard part, Also, the manufacturing cost can be reduced.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. The superabsorbent polymer particles include "powder" in addition to "particles". As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and crosslinked sodium carboxymethyl cellulose. A thing, an acrylic acid (salt) polymer, etc. can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are suitably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even in the case of the bulky absorber 56, it is possible to effectively suppress the sticky feeling after liquid absorption. The gel strength is measured as follows. 49.0 g of artificial urine (urea: 20 wt%, salt: 8 wt%, calcium chloride dihydrate: 0.3 wt%, magnesium oxide heptahydrate: 0.8 wt%, pure water: 70.01 wt%), Add 1.0 g of superabsorbent polymer and stir with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

(Absorber of the second embodiment)
Next, the absorber 56 of 2nd Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the same components as the absorber 56 of 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 10, when the absorbent body 56 is worn with a pants-type disposable diaper 100, the absorbent body 56 includes an absorbent body sacrum portion 70 that is formed in a substantially W shape and is positioned on the sacrum portion of the wearer. Wearer formed between the absorber abdominal side 71 formed in a substantially rectangular shape located in the front side and the abdomen of the front and rear direction in the crotch of the person, and between the absorber sacrum 70 and the absorber abdominal side 71 Absorber starboard part 72 located in the starboard part of the body, Absorber left starboard part 73 located between the left side of the wearer formed between the absorber sacrum 70 and the absorber ventral part 71, and the starboard part of the absorber It is divided into an absorbent center ridge 74 which is formed between 72 and the absorber left ridge 73.

  The bottom side of the absorbent body sacrum part 70 formed in a substantially W shape is located at the back end part in the front-rear direction of the absorbent body 56, and as shown in FIG. When the wearer wears the pants-type disposable diaper 100, the inner side portions of the left and right leg portions in the width direction of the absorbent body 56 are positioned so as to be located in a portion deviated from the center portion of the sacrum of the wearer to the tailbone in the rear view. And it is located in the site | part biased in the center part of the 1st virtual line 59A which divides | segments the exterior part 12 in the back part side part of the absorber 56 and the absorber 56 into the front-back direction. In addition, the absorbent sacrum 70 is wrapped with the packaging sheet 58 and further wrapped with the surface sheet 30 from the outside of the packaging sheet 58, and the anti-body surface of the surface sheet 30 is fixed to the body surface of the exterior body 12. .

  An abdominal side in the front-rear direction of the absorber ventral side portion 71 formed in a substantially rectangular shape is located at a ventral end portion in the front-rear direction of the absorber 56, and a dorsal side in the front-rear direction of the absorber ventral side portion 71. When the pants type disposable diaper 100 is worn by the wearer, the second virtual section that divides the exterior body 12 in the absorbent body 56 into four in the front-rear direction so as to be located on the back side of the crotch portion of the wearer. It is located near line 59B. Further, the absorbent belly side portion 71 is wrapped with the packaging sheet 58 together with the absorbent starboard portion 72 and the absorbent portside portion 73, and further wrapped with the topsheet 30 from the outside of the packaging sheet 58, and the absorbent belly on the topsheet 30. The opposite body surface of the portion opposite to the side portion 71 is fixed to the body surface of the exterior body 12.

  The absorber starboard portion 72 is positioned between the starboard rear portion 72A formed in a substantially inverted triangular shape adjacent to the side portion in the width direction of the absorber sacrum portion 70, and between the starboard rear portion 72A and the absorber ventral side portion 71. It has a substantially rectangular right buttock front portion 72B. Further, the absorber starboard portion 72 is wrapped with the packaging sheet 58 together with the absorber ventral side portion 71 and the absorber portside portion 73, and is further wrapped with the topsheet 30 from the outside of the packaging sheet 58. As shown in FIG. 12, the opposite body surface of the surface sheet 30 at a portion opposed to the right buttock rear portion 72A is not fixed to the body surface of the exterior body 12. A central region 82A divided by a first imaginary line 81A and a second imaginary line 81B that divides the right buttock front portion 72B in the width direction into three equal parts in the opposite body surface of the portion facing the right buttock front portion 72B in the surface sheet 30 The right side region 82B fixed to the body surface of the exterior body 12 and adjacent to the outside of the central region 82A and the left side area 82C adjacent to the inside of the center region 82A are not fixed to the body surface of the exterior body 12. Also, the central region 82A can be unfixed to the body surface of the exterior body 12.

  The absorber port part 73 is positioned between the left port part rear part 73 </ b> A formed in a substantially inverted triangular shape adjacent to the side part in the width direction of the absorber sacrum part 70, and the port part rear part 73 </ b> A and the absorber ventral side part 71. It is formed of a substantially rectangular left port front 73B. Further, the absorbent port part 73 is wrapped with the packaging sheet 58 together with the absorbent ventral side part 71 and the absorbent starboard part 72, and is further wrapped with the top sheet 30 from the outside of the packaging sheet 58. As shown in FIG. 12, the anti-body surface of the surface sheet 30 that faces the port part rear portion 73 </ b> A is not fixed to the body surface of the exterior body 12. A central region 84A defined by a first imaginary line 83A and a second imaginary line 83B that equally divides the left front part 73B of the part opposite to the left front part 73B of the top sheet 30 into three in the width direction. The left region 84B that is fixed to the body surface of the exterior body 12 and is adjacent to the outside of the central region 84A and the right region 82C that is adjacent to the inside of the center region 84A are not fixed to the body surface of the exterior body 12. Also, the central region 84A can be unfixed to the body surface of the exterior body 12.

  The absorber central collar 74 includes a central collar rear part 74A formed in a substantially triangular shape adjacent to the central part in the width direction of the absorber sacrum 70, a starboard front part 72B of the absorber starboard part 72, and an absorber left collar part. It is formed of a substantially rectangular central buttock front portion 74B located between the port front 73B. Moreover, the absorber center collar 74 is wrapped with the packaging sheet 58 together with the absorber ventral side 71, the absorber starboard 72, and the absorber left collar 73, and is further wrapped with the surface sheet 30 from the outside of the packaging sheet 58. The opposite body surface of the portion of the sheet 30 opposed to the absorber central buttocks 74 is fixed to the body surface of the exterior body 12.

  The sacrum part 70 of the absorber and the posterior part 72A of the right heel part of the absorber starboard part 72 are partitioned by a partition line 75 extending downward from the one side in the width direction of the bottom part of the absorber sacrum part 70 toward the apex. The sacral part 70 and the left posterior part 73A of the absorber port part 73 are partitioned by a partition line 76 that extends downward from the other side in the width direction of the bottom part of the absorber sacrum part 70 toward the top, and the absorber. The sacral portion 70 and the central posterior portion 74A of the absorber central heel portion 74 extend from the top of one side of the absorber sacrum portion 70 to the right and then extend downward to the right and extend to the other side of the absorber sacrum 70. One side in the width direction of the right buttock front part 72B of the absorber starboard part 72 and the central buttock front part 74B of the absorber center ridge part 74 is one side of the absorber sacrum part 70. From the top to the dorsal side of the absorber's ventral side 71 The other side in the width direction of the left front part 73B of the absorber port part 73 and the central front part 74B of the absorber center part 74 is defined by the section line 79 extending straight. It is partitioned by a dividing line 80 extending straight from the other top to the dorsal side of the absorber ventral side 71.

  The dividing line 75 is a slit line having a predetermined interval that separates the absorber sacrum 70 and the starboard posterior part 72A of the absorber starboard part 72, and separates the dividing line 76 from the absorber sacrum part 70. A slit line having a predetermined interval is formed by dividing the left posterior part 73A of the body port part 73 into separate parts, and a dividing line 78 divides the central posterior part 74A of the absorber sacrum part 70 and the absorber central butt part 74. The dividing line 79 divides one side in the width direction of the starboard front part 72B of the absorber starboard part 72 and the center base part front part 74B of the absorber center base part 74. The dividing line 80 is formed on the other side in the width direction of the left front part 73B of the absorber port part 73 and the central front part 74B of the absorber center part 74. A slit with a predetermined interval divided and separated In this case, when the pants-type disposable diaper 100 is worn by the wearer, the absorbent sacrum 70 is in close contact with the wearer's sacrum, and the back side portion of the wearer's crotch The absorber center buttock 74 comes into close contact with the wearer, and the absorber starboard portion 72 easily stands up with the movement of the wearer, so that the absorber starboard portion 72 comes into close contact with the wearer's starboard portion, and the wearer moves. As the absorbent port part 73 stands up easily, the absorber port part 73 comes into close contact with the wearer's port part, and leakage of the excrement of the wearer from the back side portion of the pants-type disposable diaper 100 occurs. It is possible to prevent the delivery. Moreover, the absorber abdomen side part 71 closely_contact | adheres to a wearer's abdomen, and it can prevent the leakage to the exterior from the abdomen side part of the pants type disposable diaper 100 of a wearer's excrement. The width of the dividing lines 75 to 80 is preferably 5 to 20 mm. If the width of the lane line 75 or the like is less than 5 mm, the lane line may be crushed during manufacturing, and if the width of the lane line 75 or the like exceeds 20 mm, excrement may stay in the lane line 75 or the like. is there. In addition, the widths of the dividing lines 75 and the like can be different between the body surface side and the opposite body surface side.

(Packaging sheet)
As the packaging sheet 58, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet having small holes, or the like can be used. However, it is desirable that it is a sheet from which the superabsorbent polymer particles can not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

<Exterior body>
As shown in FIG. 3, the exterior body 12 includes a portion constituting a front body F extending from the crotch portion to the ventral side and a portion constituting a back body B extending from the crotch portion to the back side. Fixing both sides of the front body F and both sides of the back body B, as shown in FIG. 1, the waist opening WO for passing the torso of the wearer and the left and right sides for passing the legs. A pair of leg openings LO is formed. The exterior body 12 is not particularly limited, and the part constituting the front body F and the part constituting the back body B can be separated.

  As shown in FIGS. 5 and 6, the exterior body 12 is formed by fixing two sheets of the first sheet material 12S and the second sheet 12H. The second sheet material 12H located on the inner side extends only to the edge of the waist opening WO, but the first sheet material 12S located on the outer side wraps around the edge on the waist side of the second sheet material 12H. It is folded back inside. Further, between the first sheet material 12S and the second sheet 12H, an elongated waist edge elastic elastic member 17 disposed at the waist edge W and an elongated waist lower elasticity disposed at the waist lower portion U. A telescopic member 15 and a slender middle elastic telescopic member 16 disposed at the middle portion L of the front body F and the rear body B are fixed.

The waist edge elastic stretchable member 17 is stretched along the width direction at a predetermined stretch rate and at a predetermined stretch rate so as to be continuous over the entire width direction in the vicinity of the waist opening WO It is fixed in the The waist edge elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1. the rubber thread 0mm about ^2), 3 to 22 present approximately at intervals of 4 to 12 mm, respectively elongation from 150% to 400%, preferably fixed in particular about 220-320%. Note that several waist edge elastic elastic members 17 arranged on the inner body 200 side of the waist edge elastic elastic member 17 may be arranged so as to overlap the inner body 200.

The waist lower elastic expansion / contraction member 15 is separated by a predetermined interval in the vertical direction so as to be continuous over the entire width direction at each part on both sides in the width direction except for the central portion in the width direction that overlaps the interior body 200. It is being fixed in the state extended | stretched along the width direction with the expansion | extension rate of. The waist lower elastic elastic member 15 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to It is preferable to fix the thread rubber of about 1.0 mm ² ) at an interval of 1 to 15 mm, particularly 3 to 8 mm, and about 5 to 30 at an elongation of 200 to 350%, particularly about 240 to 300%.

The middle elastic elastic member 16 is separated from each other on both sides in the width direction by a predetermined interval in the vertical direction so as to be continuous over the entire width direction, except for the central portion in the width direction, which overlaps the interior body 200, and It is fixed in a state of being stretched along the width direction at a predetermined stretch rate. As the intermediate resilient and elastic members 16, the thickness 155～1880Dtex, particularly about 470～1240Dtex (the case of synthetic rubber. Cross-sectional area in the case of natural rubber 0.05 to 1.5 mm ^2, in particular 0.1 It is preferable to fix the thread rubber of about 1.0 mm ² ) at an interval of 5 to 40 mm, particularly 5 to 20 mm, and about 2 to 10 at an elongation of 150 to 300%, particularly 180 to 260%.

<Explanation of terms in the specification>
When the following terms are used in the specification, they have the following meanings unless otherwise specified in the specification.
“Elongation rate” means a value when the natural length is 100%.
-"Artificial urine": urea: 20 wt%, salt: 8 wt%, calcium chloride dihydrate: 0.3 wt%, magnesium oxide heptahydrate: 0.8 wt%, and pure water: 70.01 wt% Unless otherwise specified, the mixture is used at a temperature of 40 degrees.
"Gel strength" is measured as follows. Add 1.0 g of superabsorbent polymer to 49.0 g of artificial urine and stir with a stirrer. The formed gel is allowed to stand in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours and then returned to normal temperature, and the gel strength is measured with a curd meter (manufactured by I. techno Engineering: Curdmeter-MAXME-500).
・ "Age" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.
-"Water absorption" is measured by JIS K7223-1996 "Test method for water absorption of superabsorbent resin".
"Water absorption rate" is the "time to end point" when JIS K 7224-1996 "Water absorption rate test method for super absorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline I assume.
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not in a natural length state, and a deployed state means a state of being flatly developed without contraction or slack.
・ "Sacrum" is a large inverted roughly triangular bone located in the lower part of the spine, which is located in the upper rear part of the pelvis and is inserted into the hipbone like a wedge. The upper part of the sacrum is connected to the lowest part of the lumbar vertebra, and the lower part of the sacrum is connected to the coccyx.

  INDUSTRIAL APPLICABILITY The present invention can be used for absorbent bodies such as pants-type disposable diapers and tape-type disposable diapers.

11 Liquid Impervious Sheet 12 Exterior Body 30 Top Sheet 56 Absorber 59A First Virtual Line 59B Second Virtual Line 70 Absorber Sacrum (First Absorber Part)
71 Absorber ventral side (second absorber)
72 Absorber starboard (third absorber)
72A right rear buttocks (third absorber rear)
72B starboard front (third absorber front)
73 Absorber port part (4th absorber part)
73A Left buttocks rear (4th absorber rear)
73B Left buttock front part ( front part of 4th absorber)
75 section line (first section line)
76 parcel line (second parcel line)
77 parcel line (3rd parcel line)
78 Section line 79 Section line 80 Section line 200 Interior body

Claims (2)

In the disposable diaper in which the exterior body and the interior body are fixed to the inner surface of the exterior body,
The interior body includes a liquid-permeable surface sheet provided on the body surface side, a liquid-impermeable sheet provided on the non-body side, and an absorption provided between the surface sheet and the liquid-impermeable sheet. Formed in the body,
In the inner surface plan view, the absorber includes a first absorber portion located on the back side of the absorber, and a second absorber portion located on the ventral side of the absorber, the first absorbent body parts and a third absorbent portion which is located on one side in the width direction between the second absorber portion, a fourth located on the other side in the width direction between the first absorbent body and the second absorbent portion Divided into absorbers ,
The first absorber portion and the exterior body are fixed, the second absorber portion and the exterior body are fixed, the third absorber portion and the exterior body are not fixed, and the fourth absorber portion and the exterior body are fixed. Not fixed ,
The first absorber portion is formed in a substantially inverted triangular shape, the bottom side of the first absorber portion is positioned at the back side end portion of the absorber, and the top portion of the first absorber portion is absorbed by the absorption Positioned at the center of the body in the width direction and on the first first imaginary line from the back side that divides the exterior body in the absorbent body into four in the front-rear direction;
The second absorber portion is formed in a substantially rectangular shape, the ventral side of the second absorber portion is positioned at the ventral end of the absorber, and the dorsal side of the second absorber portion is A side is positioned on the second second imaginary line from the back side that divides the exterior body of the absorber into four parts in the front-rear direction,
The opposing part of the first absorbent part and the third absorbent part is divided by a first dividing line, the opposing part of the first absorbent part and the fourth absorbent part is divided by a second dividing line, and the first Dividing the opposing part of the 3 absorber part and the 4th absorber part by the 3rd division line,
A disposable diaper characterized in that the first dividing line, the second dividing line, and the third dividing line are slit lines having a predetermined interval, and the width of the slit line is 5 to 20 mm . The third absorbent body portion is formed in a substantially rectangular shape, and a rear portion of a third absorbent body portion formed in a substantially inverted triangle shape adjacent to the first absorbent body portion , and a fourth rectangular shape adjacent to the fourth absorbent body portion Formed at the front part of the three absorbers , and the fourth absorber part is formed on the fourth absorber part rear part formed in a substantially inverted triangular shape close to the first absorber part , and the third absorber part . the disposable diaper of claim 1, wherein formed in the fourth absorber front part formed in a substantially rectangular shape in proximity.

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