JP2018082872A - Underpants type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants type disposable diaper which allows a caregiver to smoothly replace a diaper on a few-month-old baby or several-month-old baby.SOLUTION: A disposal tape 4 having an attachment part 40 which can be detachably attached to a non-skin facing surface is provided on a center part in a lateral direction Y of a non-skin facing surface of an exterior body 3 of a back side part C. An overlapping part with an absorber 23 on a non-skin facing surface of the exterior body 3 on a ventral part A or crotch part B has an aperture formation area 6 on which plural apertures 5 are disposed in a scattered state. On the exterior body 3, if the disposal tape 4 and a virtual extension area of the disposal tape 4 in the vertical direction X are placed on a center of the lateral direction Y, and an area having a lateral direction length which is three times of a lateral direction length of the disposal tape 4 and extension area is an exterior body lateral direction center area 7, the exterior body lateral direction center area 7 has a large area ratio of the apertures 5 relative to an exterior body lateral direction end areas 8 on outside of the lateral direction Y.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pants-type disposable diaper comprising a disposal tape, and particularly to a pants-type disposable diaper that is suitably used for low to middle-aged children.

  As a disposable diaper, a disposable diaper having a disposal tape on its outer surface is known. The disposal tape is used to hold the used diaper when it is rolled up and discarded. As a typical configuration of the disposal tape, one end in the longitudinal direction of the tape is the outer surface of the diaper. The other end portion has a fastening portion made of an adhesive or the like, and is folded three times in the longitudinal direction of the tape to form a Z shape. When using the waste tape having such a configuration, the diaper to which the waste tape is attached is rolled up in the longitudinal direction thereof, and then the waste tape is expanded. The diaper is fixed to the side opposite to the fixed end side of the waste tape. Thereby, a diaper comes to be hold | maintained in the state rolled up, and the process becomes easy, without a diaper becoming bulky.

By the way, in the said technical field, forming an opening in the outer surface of absorbent articles, such as a disposable diaper, is performed conventionally. For example, Patent Document 1 discloses a pant-type disposable diaper that includes an absorbent main body including a liquid-retaining absorbent body and an exterior body that is disposed to face a non-skin-facing surface of the absorbent main body. It describes that a hole forming process is performed in an overlapping area with the sex main body. This hole forming process is intended to weaken the tightening of the absorber by the elastic member that crosses the exterior body in the lateral direction, and to prevent the occurrence of unintended vertical fistula and the resulting decrease in the absorption performance. In Patent Document 1, this hole forming process is performed on the outer surface of the outer body of the abdomen and the back, the hole pitch is set to 1 to 25 mm, and the area of the hole is disclosed in Patent Document 1. It describes that it is 0.01 mm ² or more.

  Further, in Patent Document 2, for the purpose of improving the breathability of the exterior body in the pants-type disposable diaper, a plurality of through holes are scattered in a region that does not overlap the absorbent main body in the exterior body on the abdomen and the back side. Have been described. Patent Document 2 describes that as an advantage of not forming a through hole in a region of the exterior body that overlaps with the absorbent main body, it is difficult for the user to recall anxiety about leakage and the usability is improved. Further, in Patent Document 2, from the viewpoint of making it difficult to remind the user of anxiety about leakage, the opening area of the through hole located in the central portion in the lateral direction of the diaper is set close to the side seal portion, that is, at both lateral ends. It is also described that the area is smaller than the opening area of the through-hole located. Patent Document 3 also describes that a through hole is provided in the exterior body for the same purpose.

  Patent Document 4 discloses a pants-type disposable diaper that includes a sheet on which a decorative element such as a picture is applied and an outer sheet that covers the decorative element from the outside, and the decorative element is externally provided via the outer sheet. From the viewpoint of making it transparently seen through, it is described that a plurality of apertures having a diameter of 0.3 to 5 mm are formed at an aperture ratio of 30 to 70% in the lateral center portion of the outer sheet. .

JP 2011-225000 A Japanese Patent Laying-Open No. 2015-107223 JP-A-2015-128573 JP 2004-141640 A

  For example, when the wearer of a pants-type disposable diaper is a low-aged infant and the mother changes diapers, the diaper is usually removed from the body of the low-aged infant by first tearing the side seal part of the diaper. The used diaper is placed near the body of a low-aged infant sleeping on his / her back in an unfolded state with the inner surface (skin facing surface) on which excrement is attached facing upward. Then, the excrement such as stool adhering to the butt of the younger-aged child is wiped off with a sheet-like wiping cloth prepared separately, and the used wiping butt is disposed on the used diaper. FIG. 10 shows a state of such a diaper change of a young child, and in FIG. 10 (a), excrement 11 such as loose stool adheres on a developed diaper indicated by reference numeral 1Z. The state where the used wiping wipe 10 is discarded is shown. When the wiping operation of the excrement 11 is completed, the used diaper 1Z in the unfolded state is rounded in the longitudinal direction together with the used wiping wipe 10 discarded there, and as shown in FIG. The waste tape 4 provided on the outer surface of 1Z is used to hold the rolled state, and the state is discarded.

  Although low to middle-aged children of about 2 to 8 months after birth cannot stand, they can turn over and go high, and often take a sleeping posture when changing diapers. In addition, low to middle-aged children often excrete so-called soft stools such as watery stools and mud stools. Furthermore, compared to newborn babies within one month of life, the number of stools is small, and a large amount at a time. There is a tendency to loose stool. For this reason, when changing diapers for low to middle-aged children, the number of necessary wiping of butt is usually not enough, but it is not enough to wipe off the excrement by wiping the butt and using the wiped diaper after use. It is necessary to repeat a series of operations, such as disposal, many times.

  Particularly problematic in such diaper changing work is the behavior of low to middle-aged children. Low to middle-aged children, such as those who wear pants-type disposable diapers, are generally active, often rushing to escape while changing diapers, and are curious and crawling with their hands. Therefore, when the unfolded diaper is placed around such a low to middle-aged child with the dirty wiping wipe exposed, as shown in FIG. Trying to touch it with your hand, throwing dirty butt wipes with your hand, or trying to put it in your mouth. Therefore, during the replacement work of diapers of low to middle-aged children, at least when the hand of the person performing the replacement work is occupied, for example, the person who performs the replacement work of the low to middle-aged child who is a diaper wearer with wiping ass While wiping the buttocks, the used diaper cannot be placed near a low to middle-aged child in the unfolded state, as shown in FIG. In addition, it must be temporarily fixed with waste tape. Then, when the excrement wiping work by wiping the hips is performed multiple times, each time the wiping work is finished, first, the temporary fixing with the disposal tape is released, and then the rounded diaper is developed. After disposing of the used wiping wipe on the unfolded diaper, the diaper must be rolled up and temporarily fixed with disposal tape so that it can be safely touched by low to middle-aged children The removal and removal of the fastening portion of the waste tape is repeated many times. There is also data that the average number of repetitions of such a series of operations is 5 to 10 times or more, and all wiping work for excrement by wiping the butt is completed, and the used wiping wipe is discarded together with the used diaper. Therefore, when the diaper is rolled up and finally shape-retained with the waste tape, the fastening portion is caused by the fluff on the outer surface of the diaper being attached to the fastening portion of the essential waste tape. The adhesive strength of the diaper decreases, the rolled diaper cannot be maintained, and the diaper that should have been rolled up before being opened may open, resulting in a dirty wiping of the butt.

  In addition, mothers often change diapers for low to middle-aged children.For example, mothers at this time can drink low-to-medium-aged children before touching low-to-medium-aged children or after changing diapers. There are many opportunities to wash their hands, such as before making milk to touch, after touching dirty items, and there are also many opportunities to wash clothes, bedding, etc. that are dirty with baby bottles and excrement. The skin of the skin is easily roughened, and it is easy to squeeze the fingers. Saddle is a condition in which the skin around the nail has been partially peeled off, and when changing diapers with a finger with a sword, the sword tends to get caught on the outer surface of the diaper, making the diaper replacement work smooth May cause trouble.

  Therefore, the subject of this invention is related with providing the underpants type disposable diaper which can perform the diaper replacement | exchange of a low-medium-aged child smoothly.

  The present invention has a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, and a crotch portion arranged in the crotch portion of the wearer, and an abdominal side portion and a back side portion extending forward and backward A liquid-retaining absorbent body and an exterior body fixed to the non-skin-facing surface side of the absorbent body, and along the longitudinal direction of the exterior body of each of the abdominal side and the back side A pants-type disposable diaper in which a pair of side seal parts, a waist opening part, and a pair of leg opening parts are formed by joining edge portions on both sides, wherein the exterior body of the back side part or the crotch part is not A disposal tape having a fastening portion that is used when discarding the disposable diaper and is detachably fastened to the non-skin facing surface of the exterior body is provided at the lateral center of the skin facing surface. The non-skin facing surface of the exterior body of the ventral side or the crotch An opening forming region in which a plurality of openings are scattered is provided in an overlapping portion with the absorber, and the waste tape and a virtual extension region in the vertical direction of the waste tape are provided in the exterior body. When an area having a lateral length that is three times the lateral length of the waste tape and the extension area placed in the center in the lateral direction is defined as an exterior body lateral center area, the exterior body lateral center area is: It is a pants-type disposable diaper in which the area ratio of the opening is large as compared to the lateral end portion region of the exterior body located outward in the lateral direction.

  ADVANTAGE OF THE INVENTION According to this invention, the underpants type disposable diaper which can perform a diaper replacement | exchange of a low to middle-aged child smoothly is provided. The pants-type disposable diaper of the present invention has a plurality of apertures scattered in the fastening region (non-skin facing surface of the exterior body) of the disposal tape included in the diaper. Even if the release is repeated a plurality of times, the fluff in the fastening area is difficult to hit the fastening part of the waste tape, so that the reduction of the fastening force of the fastening part is effectively suppressed, and the diaper can be replaced with a thin finger Since the arrangement pattern of the holes is devised so that the fingers do not get caught on the outer surface of the diaper even if the diaper is performed, it is a diaper change of low to middle-aged children who are active and especially troublesome to change the diaper Even it can be done smoothly.

FIG. 1 is a perspective view schematically showing a ventral side part of one embodiment of a pants-type disposable diaper of the present invention. FIG. 2 is a perspective view schematically showing a back side portion of the diaper shown in FIG. FIG. 3 is a developed plan view schematically showing the non-skin facing surface in the developed and extended state of the diaper shown in FIG. FIG. 4 is an exploded perspective view schematically showing the diaper shown in FIG. FIG. 5 is a perspective view schematically showing a state where the diaper shown in FIG. 1 is rolled and temporarily fixed with a waste tape. FIG. 6 is a plan view schematically showing a part of the hole forming region in the diaper shown in FIG. 1 together with the fastening portion of the waste tape. FIG. 7 is a plan view schematically showing a part of another embodiment of the hole forming region according to the present invention together with the fastening portion of the waste tape. FIG. 8A is an explanatory view of the relationship between the diameter of the opening and the thickness of each of the exterior body and the disposal tape, and FIG. 8B is an explanatory view of the diameter of the opening. FIGS. 9A and 9B are plan views schematically showing the arrangement pattern of the holes in the hole forming region according to the present invention together with the fastening portion of the waste tape. FIG. 10: is a figure which shows typically the mode of the diaper replacement | exchange of the conventional underpants type disposable diaper in case a wearer is a low-age child, and Fig.10 (a) is on the used diaper of an unfolded state. FIG. 10 (b) is a diagram showing a state where the diaper shown in FIG. 10 (a) is rolled together with the butt wipes and temporarily fixed with a disposal tape. .

  The present invention will be described below based on preferred embodiments with reference to the drawings. The pants type disposable diaper 1 which is one Embodiment of the pants type disposable of this invention is shown by FIGS. 1-4. The diaper 1 has a longitudinal direction X corresponding to the longitudinal direction of the wearer and a lateral direction Y perpendicular to the longitudinal direction X, and a crotch portion B disposed in the crotch portion of the wearer and a ventral side portion extending in the front and back directions thereof. It has A and a back side part C, and comprises a liquid retaining absorbent body 23 and an exterior body 3 fixed to the non-skin facing surface of the absorbent body 23.

  If it demonstrates further, the diaper 1 will have the absorptive main body 2 which comprises the absorber 23, and the exterior body 3 distribute | arranged so that it may overlap with the absorptive main body 2 in the position far from a wearer's body rather than the absorptive main body 2. FIG. And both side edges A1 and C1 along the longitudinal direction X of the exterior body 3 of each of the abdominal part A and the back part C are joined by a known joining means such as an adhesive, heat seal, ultrasonic seal or the like. 1 and 2, the pair of side seal portions S, S, the waist opening WH through which the wearer's torso is passed, and the pair of leg openings LH through which the wearer's lower limb is passed. , LH is a pants-type absorbent article.

  As shown in FIG. 3, the diaper 1 divides the diaper 1 in the vertical direction X and covers the front side (abdominal side) of the wearer's body in the wearing state with reference to the vertical center line CLx extending in the horizontal direction Y. It is divided into the back F and the back R which covers the back side (back side) of the wearer's body in the wearing state. The abdominal side A is a part of the front body F, the back side C is a part of the back body R, and the crotch B extends over the front body F and the back body R. The abdominal side part A and the back side part C are parts that are in the same position as the side seal part S in the longitudinal direction X, and are arranged around the waist including the wearer's waist part when the diaper 1 is worn. The crotch part B is a region in which recesses for forming the leg openings LH and LH are formed at both side edges along the longitudinal direction X of the exterior body 3. The crotch part B has an excretion part facing part that is disposed to face the excretion part (penis or the like) of the wearer when the diaper 1 is worn, and the excretion part facing part is usually in the longitudinal direction X of the diaper 1. It is located at the center (on the vertical center line CLx) or in the vicinity thereof.

  The absorptive main body 2 has a rectangular shape in plan view as shown by the outline in FIG. 3 and extends in the longitudinal direction X from the abdominal side A to the dorsal side C. The longitudinal direction is expanded and elongated. The diaper 1 in the state is arranged at the central portion in the lateral direction Y of the exterior body 3 so as to coincide with the longitudinal direction X of the diaper 1 and is bonded to the exterior body 3 with an adhesive. The unfolded and extended state of the diaper 1 means that the diaper 1 is separated by the side seal portion S to be in the unfolded state, and the unfolded state of the diaper 1 is extended by the elastic member of each part to eliminate the design dimensions (the influence of the elastic member is completely eliminated). It is the state expanded until it becomes the same as the dimension when expanded in a flat state.

  As shown in FIG. 4, the absorbent main body 2 includes a liquid-permeable surface sheet 21 that forms a skin-facing surface, and a liquid-impermeable or liquid-permeable or water-repellent back sheet 22 that forms a non-skin-facing surface. And a liquid-retaining absorbent 23 interposed between the two sheets 21 and 22, which are integrated by a known joining means such as an adhesive. In the plan view as shown in FIG. 3, the absorbent body 23 has an hourglass shape that is long in one direction and whose central portion in the longitudinal direction is confined inward, and the longitudinal direction is made to coincide with the longitudinal direction X. It extends in the longitudinal direction X from the part A to the back side part C. As the top sheet 21, the back sheet 22, and the absorber 23, various types conventionally used for this type of absorbent article can be used without particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet 21, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 22. As the absorbent body 23, an aggregate of fiber materials such as pulp fibers or those having an absorbent core comprising water-absorbing polymer particles can be used, and the absorbent core has a liquid-permeable outer surface. It may be covered with a core wrap sheet.

  In the present specification, the “skin-opposing surface” is a surface of the absorbent article or a component thereof (for example, the exterior body 3) that is directed toward the wearer's skin when the absorbent article is worn, that is, the wearer's skin. The side close to the skin, and the “non-skin-facing surface” is the surface of the absorbent article or its constituent members that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn, that is, relatively worn The side far from the person's skin. In addition, "at the time of wearing" here means a state where a normal proper wearing position, that is, a correct wearing position of the absorbent article is maintained, and the absorbent article is in a state of being deviated from the wearing position. Is not included.

  As shown in FIG. 4, the left and right side portions along the longitudinal direction X on the skin-facing surface of the absorbent main body 2 have a pair of leakage preventions that stand up toward the wearer's skin at least at the crotch B when the diaper 1 is worn. Cuffs 24, 24 are provided. The pair of leak-proof cuffs 24 and 24 are respectively a liquid-impervious or liquid-impervious or water-repellent leak-proof cuff forming sheet continuous over the entire length of the diaper 1 in the longitudinal direction X, and the longitudinal direction X of the sheet. One or a plurality of thread-like elastic members for forming a leak-proof cuff fixed in a stretched state in the longitudinal direction X to a free edge along the elastic member, and the elastic member contracts when the diaper 1 is worn. Thus, the free edge of the sheet rises toward the wearer's skin, thereby preventing the excretion fluid such as urine from flowing out in the lateral direction Y.

  The package 3 has a rectangular shape in which the length in the lateral direction Y is longer than the longitudinal direction X in the ventral side A and the dorsal side C in a plan view in an unfolded and extended state as shown in FIG. In the crotch part B located between the side part A and the back side part C, both side edges along the longitudinal direction X of the exterior body 3, that is, the pair of leg edges LS, LS are directed toward the center in the lateral direction Y. It is curved in a convex arc shape. Since the outer package 3 forming the outer shape of the diaper 1 has such a plan view shape in the unfolded and extended state, the plan view shape of the diaper 1 in the same state is the vertical direction X as shown in FIG. The central area of the is an hourglass shape that is bound inward in the lateral direction Y.

  As shown in FIG. 4, the outer package 3 includes an outer layer sheet 31 that forms the outer surface (non-skin facing surface) of the diaper 1 in a worn state, and an inner layer sheet that forms the inner surface (skin facing surface) of the diaper 1 in a worn state. 32, the outer layer sheet 31 is relatively far from the wearer's skin, and the inner layer sheet 32 is relatively close to the wearer's skin. The outer layer sheet 31 and the inner layer sheet 32 are bonded to each other through a bonding means such as an adhesive at a predetermined portion. As shown in FIG. 4, the outer layer sheet 31 extends from the edge in the longitudinal direction X of the inner layer sheet 32 to the ventral side portion A and the back side portion C, and is folded back to the skin facing surface side of the inner layer sheet 32. Although it has 31E, this folding | returning part 31E has coat | covered the edge part of the vertical direction X of the absorptive main body 2 although not shown in figure.

  As the outer layer sheet 31 and the inner layer sheet 32, various types conventionally used as an exterior body in this type of absorbent article can be used without any particular limitation. For example, spunbond nonwoven fabric, air-through nonwoven fabric, needle punch Nonwoven fabrics produced by various production methods such as nonwoven fabrics can be mentioned. The types of sheet materials constituting both sheets 31 and 32 may be the same or different.

As shown in FIGS. 1 to 4, a plurality of thread-like or belt-like waist elastic members 33 are arranged in the lateral direction Y in each of the abdominal part A and the back side part C. The surrounding elastic members 33 are intermittently arranged at predetermined intervals in the vertical direction X. As described above, the waist elastic member 33 is arranged in a state where the elastic elasticity of the waist elastic member 33 is expressed at the part arranged around the waist of the wearer including the waist part, so that the entire circumference of the part is substantially increased. A continuous annular waist gather and waist circumference gather are formed.
Further, a leg elastic member 34 for forming one or a plurality of leg gathers in the form of threads or strips is arranged in an extended state on the leg edge LS that forms the opening edge of each of the pair of leg openings LH, LH. As a result, an annular leg gather substantially continuous over the entire circumference is formed at the opening edge of each of the pair of leg openings LH, LH.
In the region where the absorbent main body 2 is disposed in the outer package 3 (the region overlapping the absorbent main body 2 in plan view), the waist elastic member 33 is divided and the elasticity is hindered. It is not arranged in the expressed state.
Each of the elastic members 33 and 34 is sandwiched and fixed between the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 by a bonding means such as an adhesive. As each elastic member 33 and 34, what formed elastic materials, such as natural rubber, a polyurethane-type resin, foamed urethane-type resin, and a hot-melt-type elastic member, in the shape of a thread (thread rubber) or a belt (flat rubber), is used preferably. It is done.

  As shown in FIGS. 1, 3, and 4, the non-skin facing surface of the exterior body 3 of the back side C, that is, the central portion in the lateral direction Y of the outer surface of the diaper 1 is used when the diaper 1 is discarded. A disposal tape 4 having a fastening portion 40 that can be detachably fastened to the non-skin facing surface of the exterior body 3 is provided. Since the disposal tape 4 is provided, the used diaper 1 can be rolled up, stopped with the disposal tape 4 and made into a compact form, and then discarded, so that the disposal of the diaper 1 can be performed easily and hygienically. Can do. The waste tape 4 is usually provided on the back side C as shown in FIG. 3, but it may be provided so as to straddle the back side C and the crotch part B in the longitudinal direction X. You may provide in the part near the back side part C in B).

  In the present embodiment, the disposal tape 4 has a strip shape that is long in one direction, and one end portion in the longitudinal direction is fixed to the non-skin facing surface of the exterior body 3 (outer layer sheet 31) with an adhesive or the like, and the other end portion. Has a fastening portion 40 made of a fastening material, and is folded in triplicate in the longitudinal direction to form a Z shape. The longitudinal direction of the waste tape 4 coincides with the longitudinal direction X. The fastening portion 40 has a shape that is long in the vertical direction X, typically a rectangular shape as shown in FIG. 6, and the length or width in the horizontal direction Y is substantially the same as the width of the waste tape 4. The end of the waste tape 4 opposite to the fixed end functions as a knob 41 that can be used when the waste tape 4 is gripped with fingers. Such a configuration of the disposal tape 4 is basically the same as the disposal tape in a conventional disposable diaper.

  As the fastening material constituting the fastening part 40, those usually used for the disposal tape of this type of disposable diaper can be used without particular limitation, and an adhesive is common. Examples of the adhesive used for the fastening part 40 include a styrene-butadiene block copolymer, a styrene-isoprene block copolymer, an acrylate ester, an acrylic copolymer, vinyl acetate, and an ethylene-vinyl acetate copolymer. Hot melt resin or emulsion is mentioned.

  In addition, as a fastening material as a forming material of the fastening portion 40, on the premise that the non-skin facing surface of the exterior body 3 (outer layer sheet 31) to which the fastening portion 40 is fastened is formed of a nonwoven fabric. A male material of a mechanical fastener can also be used. Here, the mechanical fastener is composed of a male material in which a large number of protruding engaging members are arranged on the surface and a female material in which loop portions, net-like portions, etc. are arranged on the surface. It is a fastening device that is made to be joined to each other by surface-contacting the material. When the non-skin facing surface of the exterior body 3 to which the fastening portion 40 is fastened is formed of a nonwoven fabric, the nonwoven fabric itself can function as a female material for the mechanical fastener. The male material may be used.

  As one of the main features of the diaper 1, as shown in FIGS. 1 to 4, an overlapping portion (absorbed in a plan view) with the absorbent body 23 on the non-skin facing surface of the exterior body 3 of the ventral part A or the crotch part B. The point which the hole formation area | region 6 in which the some opening 5 is scattered is provided in the part which overlaps with the body 4 is mentioned. In the present embodiment, the hole forming area 6 is provided in both the abdominal part A and the crotch part B, but is not provided in the back side part C, and the opening 5 is provided in the back side part C. Is not formed.

  The aperture formation region 6 is a region where a plurality of apertures 5 exist together. Here, “a plurality of apertures exist together” means a state in which the plurality of apertures 5 are close to each other, and this “state in which the plurality of apertures are close to each other” Although the plurality of apertures 5 are not in contact with each other, it means a state where they are close enough to feel an integrated unity. In order to say that the plurality of apertures 5 are close to each other, the separation distance between one aperture 5 and the other aperture 5 positioned closest to the aperture 5 is preferably 15 mm. Hereinafter, it is more preferably within the diameter of the opening 5. Since the opening forming region 6 is a portion where the plurality of holes 5 are distributed in a single unit on the non-skin facing surface of the exterior body 3, a portion where only one opening 5 exists or None of the portions where the plurality of apertures 5 are arranged apart from each other without feeling the unity is not the aperture formation region 6.

  The opening 5 is provided mainly for smoothly changing the diaper 1 and particularly reduces the burden of changing the diaper associated with the defecation of soft stool in a low-to-middle-aged child whose movement is active. Useful for. That is, in the diaper exchange accompanying the defecation of soft stool of low to middle-aged children, as described above, in addition to the diaper changing work, in addition to the diaper replacement work, several wiping butt is used to adhere to the body of the low to middle-aged children Since the work of wiping off loose stool is added, it is necessary to repeat the temporary fixing with the disposal tape and its release many times, so that the fastening force of the fastening part of the disposal tape is reduced and the diaper is kept in a rounded state. There is a problem that it becomes difficult. In this regard, in the diaper 1, the part used as the fastening region of the fastening part 40 of the disposal tape 4 on the non-skin facing surface of the exterior body 3 (the non-skin of the exterior body 3 of the ventral part A or the crotch B) Since the overlapping portion of the opposing surface with the absorbent body 23 is an aperture forming region 6 in which a plurality of apertures 5 are scattered, the diaper 1 is rolled up in the vertical direction X and stopped with a waste tape 4 according to a conventional method. In this case, as shown in FIG. 5, a part of the fastening portion 40 of the disposal tape 4 can overlap with the opening 5, and the opening 5 is a portion recessed from the peripheral portion. Since there is no fluff that causes a reduction in the fastening force of the fastening part 40, as long as the fastening part 40 is fastened to the hole forming region 6, the fastening part 40 can be repeatedly attached and detached repeatedly. A decrease in the fastening force of the landing portion 40 is unlikely to occur. Therefore, according to the diaper 1, even after the temporary fixing with the disposal tape 4 and the release thereof are repeated a plurality of times in the replacement operation, the compactly rounded state can be maintained as shown in FIG. It can be done easily.

  Further, in the diaper 1, not only the opening 5 is simply provided on the non-skin facing surface of the exterior body 3, but also the arrangement pattern of the opening 5 is devised. That is, in the diaper 1, as shown in FIG. 3, in the outer package 3, the disposal tape 4 and a virtual extension region in the longitudinal direction X of the disposal tape 4 are placed at the center in the lateral direction Y. When the region having the length in the lateral direction Y that is three times the length in the lateral direction Y (that is, the width) of the extension region is defined as the exterior body lateral direction central region 7, the exterior body lateral direction central region 7 is The area ratio of the opening 5 is larger than the lateral end region 8 of the exterior body located outside the lateral direction Y. Here, the length or width in the lateral direction Y of the exterior body lateral direction central region 7 is defined as three times the width of the waste tape 4, but the width of the waste tape 4 is not constant in the longitudinal direction X. Based on the maximum width of the waste tape 4, the width of the central region 7 in the lateral direction of the exterior body is set to three times the maximum width. Further, the “area ratio of the aperture” is a ratio of the total area of the apertures 5 existing in the unit region to the area of the unit region, and the “unit region” here is 15 mm in the vertical direction and 15 mm in the horizontal direction. This is an area having a rectangular shape in plan view.

  The fact that the above-described size relationship “area ratio of the opening 5 in the lateral region 7 in the lateral direction of the exterior body> area ratio of the opening 5 in the lateral end region 8 in the lateral direction of the exterior body” is satisfied When the area of 5 is uniform, on the non-skin facing surface of the exterior body 3, that is, the outer surface of the diaper 1, the central portion in the lateral direction Y has a larger number of openings 5 than both sides thereof. is there. Such an arrangement pattern of the openings 5 helps to minimize inconvenience due to the formation of the openings 5. That is, there is a concern that by forming the opening 5 on the outer surface of the diaper 1, fingers are likely to be caught on the outer surface of the diaper 1, but the possibility that the fastening portion 40 of the disposal tape 4 is fastened is compared. It is considered that the lower laterally outer end region 8 of the outer body has little influence on the expression of the operational effect due to the formation of the aperture 5 described above even if the area ratio of the aperture 5 is somewhat low. Therefore, the diaper 1 can be replaced by relatively reducing the area ratio of the opening 5 in the lateral end region 8 of the exterior body and reducing the catch of fingers in the lateral end region 8 of the exterior body. We are trying to do it smoothly.

  As described above, the technology itself for dispersing a plurality of openings on the outer surface of the disposable diaper (the non-skin facing surface of the exterior body) is also described in Patent Documents 1 to 4, but these conventional technologies are known. The purpose is to prevent the occurrence of unintentional downspout on the outer surface of the diaper, to ensure the air permeability of the outer surface of the diaper, and to improve the light transmittance so that the decorative elements inside the diaper can be clearly seen through the outer surface of the diaper. Therefore, it is unrelated to smoothly changing diapers of low to middle-aged children, which is one of the main problems of the present invention. In order to solve such a problem, it can be said that it is an unprecedented technical idea to provide openings in a specific arrangement pattern on the outer surface of the diaper in consideration of the relationship with the disposal tape as described above. In addition, the material of the non-skin facing surface of the exterior body 3 (outer layer sheet 31) is not particularly limited, and is a material that causes a reduction in the fastening force of the fastening portion 40 of the disposal tape 4 and is less likely to fuzz, such as a resin film However, when a resin film or the like is used, the non-skin facing surface of the exterior body 3 is made of a non-woven fabric because the adhesive strength is too high and may be broken when the waste tape 4 is repeatedly attached and detached. Preferably, the outer layer sheet 31 is preferably a non-woven fabric. Moreover, as the fastening part 40, you may use the male material of the said mechanical fastener, However, It is more preferable to use an adhesive from a viewpoint of making use of the effect mentioned above by formation of the opening 5 to the maximum.

From the viewpoint of more surely exerting the above-described operational effects due to the formation of the opening 5, the area ratio of the opening 5 in the lateral direction central region 7 of the exterior body is determined by the opening 5 in the lateral direction end region 8 of the exterior body. It is preferably 1% or more, more preferably 2% or more, and preferably 50% or less, more preferably 40% or less, on the premise that the area ratio is larger than.
From the same viewpoint, it is preferable that the area ratio of the opening 5 in the lateral end region 8 of the exterior body is smaller than the area ratio of the opening 5 in the lateral central region 7 of the exterior body, preferably 0.5%. Above, more preferably 1% or more, and preferably 40% or less, more preferably 30% or less.

  In the diaper 1, the crotch part B has an area ratio of the opening 5 smaller than that of the ventral part A. Temporary fixing with the disposal tape 4 is for temporarily holding the diaper 1 in a rolled state, and is performed after all the work of wiping excrement adhering to the wearer's body with butt wiping is completed. Unlike the final fastening of the final disposal tape 4, which is performed quickly and a plurality of times, the diaper 1 is rolled relatively loosely and the fastening part 40 is abdominal side A of the rolled diaper 1. It is often fixed to. On the other hand, the final fastening of the disposal tape 4 (the fastening that determines the form when the diaper 1 is discarded) prevents excrement contained in the rolled diaper 1 and dirty wiping of the butt from spilling out. In many cases, the diaper 1 is rolled as compactly as possible, and the fastening portion 40 is fastened to the crotch portion B of the rounded diaper 1. Considering the above, as described above, the ventral portion A has an area of the opening 5 from the viewpoint of facilitating the temporary fixing operation by relatively weakening the fixing of the fixing portion 40 to the opening forming region 6. Preferably, the crotch part B is opened from the viewpoint of preventing the collapse of the disposal form of the diaper 1 by making the fastening of the fastening part 40 to the opening forming region 6 relatively strong. It is preferable to make the area ratio of the holes 5 relatively small.

From the viewpoint of more surely exhibiting the effect of the difference in the area ratio of the opening 5 between the ventral part A and the crotch part B, the area ratio of the opening 5 of the crotch part B is On the assumption that the area ratio of the aperture 5 of the part A is smaller, it is preferably 0.3% or more, more preferably 0.5% or more, and preferably 40% or less, more preferably 35% or less. .
From the same point of view, on the assumption that the area ratio of the opening 5 in the ventral part A is larger than the area ratio of the opening 5 in the crotch B, it is preferably 2% or more, more preferably 3% or more, and , Preferably 60% or less, more preferably 50% or less.

  In the diaper 1, the opening 5 is a through-hole penetrating the entire exterior body 3 in the thickness direction, and penetrates both the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 as shown in FIG. 4. ing. The opening 5 may not be such a through-hole, and may be a hollow portion in which the non-skin facing surface side of the exterior body 3 is recessed in a concave shape. For example, when the through hole is formed only in the outer layer sheet 31 that forms the non-skin facing surface of the exterior body 3, the opening 5 has an opening made of the through hole on the non-skin facing surface side, and The skin-facing surface side is a recess that is closed by the inner layer sheet 32. However, when the fastening portion 40 of the waste tape 4 is overlapped with the opening 5, if the opening 5 is such a recessed portion, the fluff of the inner layer sheet 32 forming the bottom of the recessed portion is fixed. There is a risk of adhering to the portion 40. In this respect, it is preferable that the opening 5 is a through-hole penetrating the entire exterior body 3 in the thickness direction because there is no fear of such fluff adhering to the fastening portion 40.

The opening 5 can be formed by applying a known sheet opening method such as melting, cutting, or punching to a part or all of the sheet constituting the exterior body 3.
Further, from the viewpoint of preventing fuzz in the opening forming region 6 and ensuring that the fastening force does not easily decrease even when the fastening portion 40 is repeatedly attached and detached, the opening 5 is provided. It is preferable that a region within 3 mm is bonded to the periphery of the outer periphery, specifically, in the in-plane direction of the exterior body 3 from the opening 5. That is, it is preferable that the fibers existing around the opening 5 are bonded by a bonding means such as an adhesive or fusion.

  In the diaper 1, as shown in FIG. 6, the hole forming region 6 is longer in both the vertical direction X and the horizontal direction Y than the fastening portion 40 of the waste tape 4. Further, with respect to the opening 5 in the opening forming region 6, the length in the lateral direction Y of the opening 5, that is, the width 5 Ly is shorter than the length in the lateral direction Y of the fastening portion 40, that is, the width 40 Ly, and The interval 5Sx in the vertical direction X between the openings 5 and 5 is shorter than the length 40Lx of the fastening portion 40 in the vertical direction X. When all these magnitude relationships are established, when the fastening portion 40 of the disposal tape 4 is fastened to the opening forming region 6 according to a conventional method, the probability that the fastening portion 40 overlaps the opening 5 is further increased. Therefore, the effect of forming the opening 5 as described above, that is, the effect that the fastening force is not easily lowered even when the fastening part 40 is repeatedly attached and detached is more reliably exhibited.

The ratio between the width 5Ly of the opening 5 and the width 40Ly of the fastening portion 40 is preferably 0.03 or more, more preferably 0.05 or more, and preferably 0.9 or less, more preferably as the former / the latter. Is 0.8 or less.
The ratio of the distance 5Sx in the longitudinal direction X between the openings 5 and 5 and the length 40Lx in the longitudinal direction X of the fastening portion 40 is preferably 0.03 or more, more preferably 0.05 or more, as the former / the latter. And preferably 0.8 or less, more preferably 0.6 or less.

The length 40Lx (see FIG. 6) of the fastening portion 40 is preferably 20 mm or more, more preferably 30 mm or more, and preferably 90 mm or less, more preferably 80 mm or less. The lateral length (maximum width) 40Ly of the fastening portion 40 is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.
The longitudinal length 5Lx (see FIG. 6) of the opening 5 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and preferably 10 mm or less, more preferably 7 mm or less.
The lateral length (maximum width) 5Ly (see FIG. 6) of the opening 5 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and preferably 10 mm or less, more preferably 7 mm or less.
The distance 5Sx (see FIG. 6) between the openings 5 and 5 in the longitudinal direction X is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably 15 mm or less.
The spacing 5Sy (see FIG. 6) between the openings 5 and 5 in the lateral direction Y is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably 15 mm or less.

  In the diaper 1, the shapes and dimensions of the plurality of apertures 5 in the aperture formation region 6 in plan view are the same, but the shapes and / or dimensions may be different from each other.

  In the diaper 1, as shown in FIG. 6, the shape of the opening 5 in plan view is a shape that is long in one direction, more specifically, a rectangular shape, and its longitudinal direction coincides with the lateral direction Y. However, as shown in FIG. 7, the longitudinal direction of the opening 5 may coincide with the longitudinal direction X and may be longitudinally long. However, when the attachment and detachment of the fastening portion 40 of the disposal tape 4 to and from the opening forming region 6 is repeated a plurality of times, the configuration in which each opening 5 is horizontally long as shown in FIG. Compared with the vertically long form of the opening 5, the portion overlapping the opening 5 in the fastening portion 40 is likely to be different each time, which is preferable. For example, when paying attention to a part of the fastening part 40, in the temporary fastening to the opening forming area 6 of the first disposal tape 4, a part of the fastening part 40 is a part other than the opening 5 (non-opening). Even if fluff adheres to the part due to overlapping with the hole part), in the next temporary fixing to the opening forming area 6 of the disposal tape 4, a part of the fastening part 40 to which the fluff adheres is opened. By overlapping with 5, the reduction of the fastening force of the fastening part 40 is effectively reduced.

  The size of the opening 5 and the thickness of the disposal tape 4 can be set as appropriate as long as the effects of the present invention are not impaired. For example, the opening of the opening 5 is relatively large and the disposal tape 4 is fixed. When the thickness of the portion 40 is relatively thin, when the disposal tape 4 is fixed to the opening forming region 6 on the non-skin facing surface of the exterior body 3, a part of the fixing portion 40 is the opening 5. It fits inside and further contacts another member (back sheet 22 in the present embodiment) arranged on the skin facing surface side of the exterior body 3, and the fluff of the other member adheres to the fastening portion 40. There is a fear. From the viewpoint of eliminating such a concern, referring to FIG. 8, the diameter R of the inscribed circle of the opening 5 may be smaller than the sum of the thickness T1 of the exterior body 3 and the thickness T2 of the fastening portion 40. preferable. That is, it is preferable that the magnitude relationship “R <T1 + T2” is established. Here, the “thickness T1 of the outer package 3” means the sum of the thicknesses of the respective layers (sheets) constituting the outer package 3, and in this embodiment, the sum of the thickness of the outer layer sheet 31 and the thickness of the inner layer sheet 32. It is. Further, the “diameter of the inscribed circle of the opening 5” here is as shown in FIG. 8B, and the diameter of the inscribed circle of the largest inscribed circle of the opening 5 is as shown in FIG. Means. The opening according to the present invention is not limited to a square shape such as the opening 5 shown in FIG. 8A, and may have a shape other than the square shape such as the opening 5A shown in FIG. Arbitrary shapes such as a circular shape, a triangular shape, a pentagonal or more polygonal shape, and a star shape can be adopted.

The diameter R of the inscribed circle of the opening 5 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less.
The thickness T1 of the outer package 3 is preferably 0.01 mm or more, more preferably 0.05 mm or more, and preferably 5 mm or less, more preferably 4 mm or less.
The thickness T2 of the fastening portion 40 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less. The thickness T2 of the fastening part 40 is measured by the following method.
The total sum of the thickness T1 and the thickness T2 is preferably 0.06 mm or more, more preferably 0.15 mm or more, and preferably 7 mm or less, more preferably 5.5 mm or less. The thicknesses T1 and T2 are both measured by the following method.

<Measuring method of thickness T1 of exterior body and thickness T2 of fastening part of waste tape>
For the measurement, a non-contact type laser displacement meter (Laser head LK-G30, displacement meter LK-GD500 (trade name)) manufactured by Keyence Corporation is used. A plate is placed on the measurement sample so that the load applied to the measurement sample (the exterior body or the fastening portion of the waste tape) is 0.05 kPa, and the thickness of the measurement sample is measured with the laser displacement meter in that state. . The thickness of a fastening part is measured with the said method with respect to two or more measurement samples, and let the average value be the thickness of the said measurement sample.

  The arrangement pattern of the openings 5 in the opening formation region 6 can be arbitrarily set, and is not particularly limited. A typical arrangement pattern of the apertures 5 is a lattice arrangement (non-staggered arrangement) as shown in FIG. 9 (a) and 9 (b), the plurality of apertures 5 are linearly arranged in a row at a predetermined interval in the vertical direction X so that the columns of the apertures 5 are arranged. A plurality of columns are arranged at predetermined intervals in the horizontal direction Y, and one aperture 5 in one column adjacent to the other in the horizontal direction Y and one aperture 5 in the other column are formed. , At the same position in the vertical direction X. In the arrangement pattern of FIG. 9A, the interval 5Sx in the vertical direction X between the openings 5 and 5 is larger than the interval 5Sy in the horizontal direction Y between the openings 5 and 5, whereas FIG. In the arrangement pattern of b), the interval 5Sx in the vertical direction X between the apertures 5 and 5 is equal to or smaller than the interval 5Sy in the lateral direction Y between the apertures 5 and 5. When the attachment / detachment of the fastening portion 40 of the waste tape 4 to / from the opening forming region 6 is repeated a plurality of times, as shown in FIG. 9A, the arrangement pattern in which the size relationship of the interval 5Sx> the interval 5Sy is established. As shown in FIG. 9B, the portion overlapping the opening 5 in the fastening portion 40 is likely to be different each time as compared with the arrangement pattern in which the size relationship of the interval 5Sx ≦ the interval 5Sy is established.

  As a preferable example of the arrangement pattern of the apertures 5 in the aperture formation region 6, a staggered arrangement can be mentioned. In the diaper 1, as shown in FIG. 2, the apertures 5 are arranged in a staggered manner at least in the front body F. As used herein, “staggered” refers to a direction in which a plurality of rows of openings 5 are arranged at equal intervals in one direction, and a plurality of rows are arranged in a direction orthogonal to the one direction, and are orthogonal to the one direction. In FIG. 2, the openings 5 are shifted (preferably shifted by a half pitch) between two adjacent rows. More specifically, when a plurality of rows in which a plurality of apertures 5 are arranged at equal intervals in one direction are projected in a direction orthogonal to the one direction, each aperture 5 in a specific row. When the projection images of the apertures 5 in another row adjacent to the specific row are arranged between the projection images (preferably in the middle), the plurality of apertures 5 are arranged in a staggered manner. I can say that. The “staggered arrangement” as used in the present invention includes not only a form in which the plurality of apertures 5 are perfectly arranged as described above, but also a slight unintentional arrangement such as an inevitable shift in manufacturing. The form in which the deviation occurs is also included. When the apertures 5 are arranged in a staggered pattern in the aperture formation region 6, the staggered arrangement is more in the area ratio of the apertures 5 than the lattice arrangement as shown in FIG. 9 under the same conditions. Since the interval 5Sx (see FIGS. 6 and 9) in the vertical direction X between the openings 5 and 5 can be made relatively wide, the attachment and detachment of the fastening portion 40 of the disposal tape 4 to the opening formation region 6 is repeated a plurality of times. In such a case, it is easy to avoid the inconvenience that the fastening portion 40 is fastened to the same position every time, and it is possible to effectively suppress a reduction in fastening force due to repeated fastening of the fastening portion 40.

  As described above, the diaper 1 can be repeatedly attached to and detached from the opening forming region 6 by attaching the fastening portion 40 of the disposal tape 4 due to the presence of the opening forming region 6 provided on the non-skin facing surface of the exterior body 3. The fastening force is less likely to be reduced, but this effect is an effect that is exhibited only when the fastening portion 40 is fastened to the opening forming region 6. In either the temporary fastening or the final fastening (fastening for determining the form when the diaper 1 is discarded), it is effective to be fastened to the central region 7 in the lateral direction of the exterior body. Therefore, from the viewpoint of ensuring such an effect, a display that suggests the extension line in a portion overlapping the extension line in the vertical direction X of the waste tape 4 on the non-skin facing surface of the exterior body 3 ( (Not shown) may be provided so as to be visible. The shape of such display can be arbitrarily set, and examples thereof include a continuous straight line shape, a broken line shape, and a pattern shape. Such a display can be given by printing, for example.

As mentioned above, although this invention was demonstrated based on the embodiment, this invention can be changed suitably, without being restrict | limited to the said embodiment.
For example, the exterior body 3 in the pants-type disposable diaper 1 is not divided into the abdominal part A and the dorsal part C as shown in FIG. Although it had a continuous shape such as an hourglass shape, the exterior body is not limited to such a continuous shape, for example, a ventral sheet member disposed on the wearer's ventral side (front side), and the wearer It is divided | segmented into the back side seat member distribute | arranged to the back side (rear side) of this, and the absorptive main body may be bridge | crossed and fixed to these both seat members.
In addition, from the viewpoint of improving absorbability, leakage prevention, and the like, a liquid permeable sheet made of various nonwoven fabrics may be interposed between the top sheet 21 and the absorbent body 23. From the same viewpoint, a groove formed by integrally compacting the topsheet 21 and the absorbent body 23 may be formed on the skin-facing surface of the absorbent main body 2.
All the parts of only the one embodiment described above can be used together as appropriate.

1,1Z pants-type disposable diapers (pants-type absorbent articles)
DESCRIPTION OF SYMBOLS 2 Absorbent main body 21 Top sheet 22 Back sheet 23 Absorber 3 Exterior body 31 Outer layer sheet 32 Inner layer sheet 4 Waste tape 40 Fastening part 41 Pick part 5,5A Opening 6 Opening formation area 7 Outer body lateral direction center area 8 Outer body lateral end area A Abdominal side B Inseam C Back side X Vertical direction Y Horizontal direction

Claims (5)

Having a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular thereto, and having a crotch portion arranged in the crotch portion of the wearer, and an abdominal side portion and a back side portion extending in the front and back thereof, A liquid-retaining absorbent body and an exterior body fixed to the non-skin-facing surface side of the absorbent body, and both side edges along the longitudinal direction of the exterior body and the back side of the exterior body. Is a pants-type disposable diaper in which a pair of side seal portions, a waist opening and a pair of leg openings are formed,
Used when discarding the disposable diaper in the laterally central portion of the non-skin facing surface of the exterior body at the back side or the crotch, and can be detachably fastened to the non-skin facing surface of the exterior body A waste tape with a secure fastening part is provided,
An opening forming region in which a plurality of openings are scattered is provided in an overlapping portion with the absorbent body on the non-skin facing surface of the exterior body of the ventral part or the crotch part,
In the outer package, the waste tape and a virtual extension area in the vertical direction of the waste tape are placed in the center in the horizontal direction, and the lateral length is three times the lateral length of the waste tape and the extension area. In the case where the region having the outer body lateral direction central region is the outer body lateral direction central region, the area ratio of the opening is larger than the outer lateral body end region located outside the lateral direction. A large pants-type disposable diaper.   The hole forming region is longer in both the vertical direction and the horizontal direction than the fastening portion, and the lateral length of the opening is shorter than the lateral length of the fastening portion, The pants-type disposable diaper according to claim 1, wherein a distance between the openings in the vertical direction is shorter than a length in the vertical direction of the fastening portion.   The pants-type disposable diaper according to claim 1 or 2, wherein the crotch part has a smaller area ratio of the opening than the ventral part.   The underpants-type disposable diaper according to any one of claims 1 to 3, wherein the openings are arranged in a staggered manner in the opening formation region.   The display which suggests this extension line is provided in the part which overlaps with the extension line to the vertical direction of the said waste tape in the non-skin opposing surface of the said exterior body in any one of Claims 1-4. Pants-type disposable diapers as described.

Images