JP2014198177A - Tape type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lower edge of a fastening tape from coming into direct contact with the skin.SOLUTION: The problem is solved by a tape type disposable diaper in which a tape passage hole 80 penetrating in a thickness direction is formed outside in a width direction a locking region of each of fastening tapes 13 in an abdominal part F. The tape type disposable diaper is worn by: inserting a portion, which extends from each of the fastening tapes 13 to the distal end of each of waist side flaps WF, into the tape passage hole 80 in the abdominal part F from inside to outside; and locking each of the fastening tapes 13, which are jutted out of the tape passage holes 80, on the sides of the center in the width direction beyond the tape passage holes 80 in the abdominal part F.

Description

  The present invention relates to a tape-type disposable diaper.

  In general tape-type disposable diapers, waist side flap portions that extend outward in the width direction from both side edges of the absorbent body are formed on the waist side portion of the abdominal side portion and the waist side portion of the back side portion, respectively. Between the waist side flap part of the side part and the side flap part of the back side part, a constricted part along the circumference of the leg is formed, and has a fastening tape that protrudes from the waist side flap part of the back side part, respectively. At the time of wearing, the fastening tape is rotated from both sides of the waist to the ventral side and connected to the outer surface of the ventral side portion (see, for example, Patent Document 1).

  However, in conventional tape-type disposable diapers, at the beginning of wearing, the waist side flap part of the abdominal part is located on the skin side of the lower edge of the fastening tape of the back part, preventing contact between the fastening tape and the skin. However, due to the movement of the legs after wearing, as shown in FIG. 10, the waist side flap portion WF of the abdominal side portion F moves to the center in the width direction, for example, drooping inward or contracting into a bellows shape. As shown in the figure, the lower edge of the fastening tape 13 is in direct contact with the outer surface of the base of the leg, as shown in FIG. There was a problem that the feeling deteriorated or the skin was damaged. In particular, when the fastening tape 13 includes a hook material (male material) of a mechanical fastener (surface fastener), the skin is easily damaged, which is a problem.

  In addition, as a material cost reduction, a straight T-shaped tape type disposable diaper is also provided without cutting the side edge along the wearer's leg, but in this case, more Furthermore, the lower edge of the fastening tape can easily come into contact with the root of the leg.

  Although the solution means like patent document 2 is proposed with respect to this problem, this prior example has difficulty in the point of manufacture ease.

JP-A-2005-319142 JP 2008-104873 A JP 2010-57714 A

  Therefore, the main problem of the present invention is to prevent the lower edge of the fastening tape from coming into direct contact with the skin.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
Having a crotch part, a ventral part extending to the front side of the crotch part, and a dorsal part extending to the rear side of the crotch part,
It has a waist side flap portion provided on both sides of the back side portion, and a fastening tape that protrudes from each of the waist side flap portions,
In the tape-type disposable diaper, when fastening to the body, turn the fastening tape from both sides of the waist to the ventral side and lock it to the outer surface of the ventral part,
A tape passage hole penetrating in the thickness direction or a perforation for forming this is formed on the outer side in the width direction from the region where the fastening tape in the ventral part is locked,
In a state where a portion from the fastening tape to the tip of the waist side flap portion is passed from the inside to the outside through the tape passage hole in the ventral side portion, a fastening tape protruding outward from the tape passage hole is provided. Attached by locking to the center side in the width direction than the tape passage hole in the side portion,
A tape-type disposable diaper characterized by that.

(Function and effect)
In the present invention, in the mounted state, the portion from the fastening tape to the tip of the waist side flap portion is in a state where it passes through the tape passage hole in the abdominal side portion and is exposed to the outer surface side of the diaper. It becomes difficult for the side flap portion to sag inside or to contract into a bellows shape. Therefore, it is difficult for the lower edge of the fastening tape to directly contact the skin.

<Invention of Claim 2>
The elastic elastic members for flat gathers are fixed in the stretched state along the front-rear direction on both sides of the ventral portion, and the tape passage hole is formed on the outer side in the width direction than the elastic elastic members for flat gathers. The tape-type disposable diaper according to claim 1.

(Function and effect)
In a tape-type disposable diaper, it is desirable to provide such an elastic elastic member for flat gathers in order to improve the fit around the legs. However, in that case, if the tape passage hole is the same as the elastic expansion / contraction member for flat gathers or is located on the inner side in the width direction, the portion outside the tape passage hole is rolled outward and becomes a hindrance. Therefore, when providing the elastic elastic member for flat gathers, it is desirable to form the tape passage hole on the outer side in the width direction than the elastic elastic member for flat gathers.

<Invention of Claim 3>
The tape-type disposable diaper according to claim 1 or 2, wherein a removal perforation for tearing from the tape passage hole to a peripheral edge of the diaper is formed.

(Function and effect)
In the present invention, since the fastening tape is passed through the tape passage hole in the abdomen at the time of wearing, it is necessary to pull out the fastening tape from the tape passage hole when changing the diaper, which is not only complicated, but also during the work There is a risk of accidental skin damage. Therefore, the removal perforation as described above is formed, and when removing the diaper, the peripheral part of the tape passage hole is separated by separating the removal perforation, and the fastening tape is taken out from the separated part. It is desirable to make it easier.

<Invention of Claim 4>
A belt-like waistline having a width direction intermediate portion and the waist side flap portions respectively provided on both sides in the width direction;
A rear end portion is connected to the middle portion of the waistline body, extends from the back side through the crotch portion to cover the abdominal side, and has an absorption body having the abdominal side portion,
The side edges of the absorbent body are linear along the front-rear direction,
The tape type disposable diaper of any one of Claims 1-3.

(Function and effect)
Such T-shaped tape-type disposable diapers are more likely to have the aforementioned problems. Therefore, the present invention is suitable for such a tape-type disposable diaper.

  As described above, according to the present invention, it is possible to prevent the lower edge of the fastening tape from coming into direct contact with the skin.

It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a perspective view which shows the base vicinity of the left leg in a mounting state. It is a principal part enlarged plan view which shows various forms. It is a perspective view which shows the mounting state of the conventional tape type disposable diaper.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1-7 has shown an example of the tape type disposable diaper, the code | symbol X in a figure has shown the full width of the diaper except a fastening tape, the code | symbol L has shown the full length of the diaper, and it is in sectional drawing. The dot pattern portion indicates a hot melt adhesive application portion.

  This tape-type disposable diaper includes a belt-like waistline body having a widthwise intermediate portion and waist side flap portions provided on both sides of the widthwise direction, and a rear end portion connected to the intermediate portion of the waistline body. A liquid-permeable top sheet that extends from the back side through the crotch to cover the abdomen and forms the body-side surface; and a liquid-impermeable sheet positioned on the outer surface side The absorbent body 10 is provided as a portion where the absorbent element 50 is interposed therebetween.

    The tape-type disposable diaper includes a pair of side flap portions SF and SF that extend laterally from the side edge of the absorbent body 56, and an end flap portion EF that extends to both front and rear sides of the absorbent body 56 in the absorbent body 10. In particular, waist side flap portions WF, which are portions where the waistline body 70 protrudes from the side edge of the absorbent main body 10, are formed on both sides in the width direction of the back side portion B, respectively. And the fastening tape 13 protrudes from the front-end | tip (side edge) of this waist side flap part WF.

  The absorbent main body 10 has a long rectangular shape in the front-rear direction, and a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot melt adhesive. The absorbent element 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order on the inner surface side. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like and is formed to be slightly wider than the top sheet 30.

  Furthermore, on both sides of the absorbent body 10, side solid gathers 60 projecting (standing) on the skin side of the wearer are provided, and gather sheets 62 and 62 forming the side solid gathers 60 are provided. It extends from the both sides of the top sheet 30 to the side edges of the diaper.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
The exterior sheet 12 makes the outer surface of the product feel like a cloth. The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, a liquid-impermeable and moisture-permeable material that has been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

(Top sheet)
The top sheet 30 is sufficient if it has liquid permeability, and for example, a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. 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, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to move excrement that has passed through the top sheet 30 to the absorbent body and prevent reversal. This intermediate sheet 40 not only quickly transfers the excrement to the absorber to enhance the absorption performance by the absorber, but also prevents the excretion of the absorbed excrement from returning from the absorber and improves the feel of the top sheet 30 surface. To do. The intermediate sheet 40 can be omitted.

  As the intermediate sheet 40, the same material as the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has the same melting point as the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 hardly occurs, but the solid content of the stool is difficult to permeate. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.

  The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Side three-dimensional gather)
In order to prevent urine and soft stools that move laterally on the top sheet 30 and prevent side leakage, side solid gathers 60 that protrude (stand up) on the use surface side are provided on both sides of the product. preferable.

  The side three-dimensional gather 60 includes a gather sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the gather sheet 62 in a stretched state along the front-rear direction. As the gather sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, rubber thread or the like can be used. As shown in FIGS. 1 and 2, a plurality of elastic elastic members can be provided in addition to a plurality of elastic expansion members.

  The inner surface of the gather sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the fixing start end is on the side portion of the liquid-impermeable sheet 11 and on the outer side in the width direction. It fixes to the side part of the exterior sheet | seat 12 located with the hot-melt-adhesive agent etc.

  Around the legs, the width direction inner side from the fixing start end of the side three-dimensional gather 60 is fixed on the top sheet 30 at both ends in the product front-rear direction, but the portion between them is an unfixed free part. The portion comes to stand by the contraction force of the elastic elastic member 63. When the diaper is mounted, the diaper is mounted on the body in the shape of a boat, and since the contraction force of the elastic expansion / contraction member 63 acts, the side three-dimensional gather 60 stands up by the contraction force of the elastic expansion / contraction member 63 and around the leg In close contact. As a result, so-called side leakage from around the legs is prevented.

  Unlike the illustrated embodiment, the front and rear direction end portions of the gather sheet 62 on the inner side in the width direction are divided into a base end side portion extending from the outer side in the width direction to the inner side in the width direction, and It is also possible to fix in a double-folded state having a distal end side portion that is folded back from the edge toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Plane gathering)
For each side flap portion SF, SF, a flat gather made of thread rubber or the like between the gather sheet 62 and the liquid-impermeable sheet 11 on the outer side in the width direction in the vicinity of the sticking start end among the sticking portions of the gather sheet 62. The elastic elastic member 64 is fixed in a state of being stretched along the front-rear direction, whereby the leg-around portions of the side flap portions SF, SF are configured as a planar gather. The elastic elastic member 64 for planar gathers can also be disposed between the liquid-impermeable sheet 11 and the exterior sheet 12 in the side flap portion SF. In addition to providing a plurality of elastic elastic members 64 for the planar gathers on each side as shown in the drawing, only one elastic elastic member 64 can be provided on each side.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as necessary a synthetic fiber tow (fiber bundle) 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 basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. 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. Further, a crimped fiber that is uniformly crimped is often used.

(Superabsorbent polymer particles)
The absorbent body 56 preferably includes superabsorbent polymer particles. In particular, at least in the liquid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of fibers. Is desirable.

  If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not enter the fiber assembly and remain on the surface thereof, and a form in which some SAP particles pass through the fiber assembly and are on the packaging sheet 58 are also excluded. It is not something.

  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. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer 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 preferably 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.

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 , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

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

  As shown in FIG. 3, the packaging sheet 58 may wrap only the back surface and the side surface of the layer in addition to the form for wrapping the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Girth body)
The waistline body 70 is a belt-like body extending from one side in the width direction of the absorbent body 10 to the other side. Since it is preferable that this waistline elastically expands and contracts in the width direction, it may be formed of a sheet-like elastic member such as a rubber sheet. However, it is preferable to use a nonwoven fabric or paper from the viewpoint of air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric can be used. However, as shown in FIG. 5, two sheet materials 71 such as a nonwoven fabric are bonded together with an adhesive such as a hot melt adhesive. In addition, a material in which an elastic elastic member 72 such as a perforated sheet, net, or elongated (thread or string) is fixed between the sheet members 71 in an extended state in the width direction is preferably used. . As the sheet material 71 in this case, the same material as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 72 has an extension ratio of about 150 to 250%. In addition, when an elongated (stretch or string-like) member is used as the elastic elastic member 72, it is preferable to provide about 5 to 15 members having a thickness of 420 to 1120 dtex at intervals 72d of 3 to 10 mm.

  Further, as shown in the drawing, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorber 56, because the fit of the absorber 56 is improved. In this case, the elastic expansion / contraction member 72 is used as the absorber 56. If the contraction force is prevented from acting on a part or all of the overlapping portion or the entire range in the width direction overlapping with the absorbent main body 10 by means of cutting or the like, at least the portions on both ends of the belt-like body are elastically stretched. However, the back end portion of the absorbent body 56 can be improved in fit without shrinking in the width direction.

  The elastic elastic member 72 may be fixed over the entire length of the sheet material 71 in the longitudinal direction of the sheet (width direction of the diaper). However, in order to prevent shrinkage and curling when attached to the diaper main body, In the range of about 5 to 20 mm at the end of the direction (width direction of the diaper), it is preferable that the contraction force does not work or the elastic elastic member 72 does not exist.

  It is appropriate that the longitudinal dimension of the belt-like body 70 is substantially the same as the longitudinal dimension of the attachment portion of the fastening tape 13, but there may be a dimensional difference of about ± 20%. Further, as shown in the figure, when the waistline body 70 is arranged so as to overlap the boundary line between the back end flap portion EF and the absorption element 50, the back side end portion of the absorption element 50 is firmly pressed against the body. ,preferable.

(Fastening tape)
1, 2, and 5, the fastening tape 13 includes a tape attachment portion 13 </ b> C fixed to both ends of the waistline body 70, and a tape that forms a tape main body portion 13 </ b> B protruding from the tape attachment portion 13 </ b> C. And a locking portion 13A for the abdominal side provided on the inner surface (skin side surface) of the tape body portion 13B in the width direction intermediate portion of the tape material, and the tip side of the locking portion 13A is a knob. It is a thing. The tape attachment portion 13C of the fastening tape 13 is sandwiched between the inner sheet and the outer sheet in the waistline body 70, and is bonded to both sheets by a hot melt adhesive. Moreover, 13 A of latching parts are joined to the tape material by the adhesive agent so that peeling is impossible.

  In the baby diaper, among the dimensions of the tape attachment portion 13C, the length X1 of the diaper in the width direction is preferably 10 to 50 mm, particularly 20 to 40 mm, and the length Y1 in the front-rear direction is 20 to 100 mm, particularly It is preferable that it is 40-80 mm. Of the dimensions of the tape body 13B, the length of the diaper in the width direction is preferably 30 to 80 mm, particularly 40 to 60 mm, and the length (height) in the front-rear direction is 20 to 70 mm, particularly 25 to 25 mm. 50 mm is preferred. In addition, when a part or all of the fastening tape 13 has a substantially tapered shape, for example, and the length in the front-rear direction and the length in the width direction are not constant, the numerical range is determined by an average value. The fastening tape 13 may have a symmetrical shape such as a rectangular shape. However, if the fastening tape 13 is a convex shape composed of a wide attachment portion and an elongated tip side portion, the grip portion on the tip side portion can be easily picked and This is preferable because the tension between the bases of this region acts over a wide range.

  As the locking portion 13A, a hook material (male material) of a mechanical fastener (surface fastener) is suitable. The hook material has a large number of engaging projections on the outer surface side thereof. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Of course, an adhesive layer can also be provided as a locking portion of the fastening tape 13.

Moreover, as a tape material which forms from tape attachment part 13C to tape main-body part 13B, although a nonwoven fabric, a plastic film, a polylamination nonwoven fabric, paper, and these composite materials can be used, the fineness of 1.0-3.5 dtex, A spunbond nonwoven fabric, air-through nonwoven fabric, or spunlace nonwoven fabric with a basis weight of 20 to 100 g / m ² and a thickness of 1 mm or less is preferred.

  When the fastening tape 13 is attached so that the tape attachment portion 13C of the fastening tape 13 overlaps the boundary line between the back end flap portion EF and the absorbing element 50, the fastening tape 13 is placed between the attachment portions of the left and right fastening tapes 13 when the diaper is attached. This is preferable because the back end portion of the absorbent element 50 is firmly pressed against the body by the tension acting on the body. Moreover, if the attachment part of the fastening tape 13 is too far from the back side end part (rear end part) of the diaper, the tension acting between the tape attachment parts 13C of the left and right fastening tapes 13 when the diaper is mounted is on the back side of the diaper. Since it does not reach the end, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap portion EF is preferably the same as or shorter than the length in the front-rear direction of the tape attachment portion 13 </ b> C of the fastening tape 13.

(Target sheet)
It is preferable to provide a target sheet 12T having a target for facilitating the locking at the locking portion of the fastening tape 13 in the ventral portion F. For the target sheet 12T, when the locking portion is the hook material 13A, a target sheet 12T can be used in which a large number of loop yarns are formed on the surface of a tape material made of a plastic film or a nonwoven fabric so that the engagement protrusions of the hook material are entangled. In the case of an adhesive material layer, a tape material surface made of a plastic film having a smooth surface that is rich in adhesiveness can be used.

  Further, when the fastening portion of the fastening tape 13 in the ventral portion F is made of a non-woven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a non-woven fabric and the fastening portion of the fastening tape 13 is the hook material 13A. Can omit the target sheet 12T and entangle the hook material 13A with the nonwoven fabric of the exterior sheet 12 to be locked. In this case, the target sheet 12T may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

  The position and dimension of the fastening part of the fastening tape 13 in the ventral part F can be determined arbitrarily. In diapers for infants, the locking location is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the distance in the height direction between the upper edge and the ventral upper edge is 0 to 60 mm, particularly 20 to 50 mm. And the center in the width direction of the product.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent body 56, respectively, and does not have the absorbent element 50. The front side extension part is the ventral end flap part EF, The extended portion on the side is the back end flap portion EF.

  It is preferable that the length of the back end flap EF in the front-rear direction is the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 13, and if the diaper back end and the absorber 56 are too close to each other. Since the gap between the dorsal side of the diaper and the body surface is likely to be generated due to the thickness and stiffness of the absorbent body 56, the thickness is preferably 10 mm or more.

  The length in the front-rear direction of the ventral end flap portion EF and the back end flap portion EF is preferably about 5 to 20% of the length L in the front-rear direction of the entire diaper. In diapers for infants, 10-60 mm, In particular, a thickness of 20 to 50 mm is appropriate.

(Tape passage hole)
Characteristically, tape passage holes 80 penetrating in the thickness direction are respectively provided on the outer side in the width direction from the region where the fastening tape 13 is locked in the ventral portion F (in the illustrated embodiment, the front end side portion of the absorbent body 10). As shown in FIG. 8, a state where the portion from the fastening tape 13 to the tip of the waist side flap portion WF is passed from the inside to the outside through the tape passage hole 80 in the ventral portion F is formed. Thus, the fastening tape 13 protruding outward from the tape passage hole 80 is locked to the center side in the width direction from the tape passage hole 80 in the ventral portion F. In this mounted state, the portion from the fastening tape 13 to the tip of the waist side flap portion WF is in a state where it passes through the tape passage hole 80 in the ventral side portion F and comes out to the outer surface side of the diaper. It is difficult for the waist side flap portion WF to be inwardly folded or contracted into a bellows shape. Therefore, a situation in which the lower edge of the fastening tape 13 is in direct contact with the skin is less likely to occur.

  The tape passage hole 80 may be a rectangular hole having a width as shown in the figure, or a slit having no width. In addition, although not shown in the figure, both sides or one side in the front-rear direction may be corrugated with a wide hole. If the length in the vertical direction of the tape passage hole 80 is longer than the vertical length of the fastening tape 13 and the vertical length of the front end portion of the waist side flap portion WF, they can pass through without being deformed. As long as the portion from the fastening tape 13 to the front end portion of the waist side flap portion WF can be passed, it is longer than the longitudinal length of the fastening tape 13 as shown in the figure but longer than the vertical length of the front end portion of the waist side flap portion WF. It may be shortened or shorter than the longitudinal length of the fastening tape 13 although not shown. In these cases, it is necessary to deform the waist side flap portion WF or the fastening tape 13 to shorten the longitudinal length.

  The position of the tape passage hole 80 can be appropriately determined as long as it is outside in the width direction from the region where the fastening tape 13 is locked, but from the viewpoint of securing the strength of the hole, a region where more stronger materials are laminated. Therefore, it is desirable to expand the range of the target sheet 12T to the position where the tape passage hole 80 is formed and form the tape passage hole 80 within the range of the target sheet 12T as shown in the figure.

  Further, as shown in the figure, when the elastic elastic member 64 for flat gathers is provided, if the tape passage hole 80 is located at the same position as the elastic elastic member 64 for flat gathers or on the inner side in the width direction, two points are shown in FIG. As indicated by a chain line, a portion outside the tape passage hole 80 is rolled outward and becomes a hindrance. Therefore, in the case where the elastic elastic member 64 for planar gathers is provided, it is desirable that the tape passage hole 80 be formed on the outer side in the width direction than the elastic elastic member 64 for planar gathers as shown in the figure.

  Further, in the present invention, since the fastening tape 13 is passed through the tape passage hole 80 of the ventral portion F at the time of wearing, it is necessary to remove the fastening tape 13 from the tape passage hole 80 when changing the diaper, and the operation is complicated. Otherwise, there is a risk of damaging the skin during the work. Accordingly, as shown in the figure, a removal perforation 90 for tearing from the tape passage hole 80 to the periphery of the diaper is formed, and when the diaper is removed, the removal perforation 90 is cut off to surround the tape passage hole 80. It is desirable to facilitate the work by separating the part and taking out the fastening tape 13 from the separated part.

  The direction of the removal perforation 90 can be determined as appropriate, and as shown in FIG. 9A, it may be formed along the front-rear direction from the front end of the tape passage hole 80 to the front end of the diaper. As shown to b), you may form along the width direction from the appropriate place (front end in the example of illustration) of the tape passage hole 80 to the side edge of a diaper.

  On the other hand, as shown in FIG. 9C, the tape passage hole forming perforations 81 may be formed without previously opening the tape passage hole 80 in the product state. In this case, when the removal perforation 90 is formed as shown in the figure, the perforation cut portion (separated) is formed so that the perforation 81 for forming the tape passage hole is easier to separate than the perforation 90 for removal. It is desirable to set the dimensions of the tie part) and the tie part (the connected part).

<Explanation of terms>
The term “front-rear direction (vertical direction)” means the direction connecting the ventral side (front side) and the back side (rear side), “width direction” means the direction (left-right direction) orthogonal to the front-rear direction, The “vertical direction” means a wearing state of the diaper, that is, a direction orthogonal to the width direction when the diaper is folded in two at the crotch portion so that the abdomen portion and the back portion of the diaper are overlapped.

  Further, the term “elongation rate” means a value when the natural length is 100%.

  The present invention can be used for a tape-type disposable diaper.

  DESCRIPTION OF SYMBOLS 10 ... Absorption main body, 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 12T ... Target sheet, 13 ... Fastening tape, 13A ... Locking part, 13B ... Tape main part, 13C ... Tape attachment part, 30 ... Top sheet , 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side gather, 62 ... Gather sheet, 64 ... Elastic elastic member for flat gather, 70 ... Girth body, 80 ... Tape Passing hole, 81 ... perforation for forming tape passing hole, 90 ... perforation for removal, F ... ventral part, B ... dorsal part, WF ... waist side flap part.

Claims (4)

Having a crotch part, a ventral part extending to the front side of the crotch part, and a dorsal part extending to the rear side of the crotch part,
It has a waist side flap portion provided on both sides of the back side portion, and a fastening tape that protrudes from each of the waist side flap portions,
In the tape-type disposable diaper, when fastening to the body, turn the fastening tape from both sides of the waist to the ventral side and lock it to the outer surface of the ventral part,
A tape passage hole penetrating in the thickness direction or a perforation for forming this is formed on the outer side in the width direction from the region where the fastening tape in the ventral part is locked,
In a state where a portion from the fastening tape to the tip of the waist side flap portion is passed from the inside to the outside through the tape passage hole in the ventral side portion, a fastening tape protruding outward from the tape passage hole is provided. Attached by locking to the center side in the width direction than the tape passage hole in the side portion,
A tape-type disposable diaper characterized by that.   The elastic elastic members for flat gathers are fixed in the stretched state along the front-rear direction on both sides of the ventral portion, and the tape passage hole is formed on the outer side in the width direction than the elastic elastic members for flat gathers. The tape-type disposable diaper according to claim 1.   The tape-type disposable diaper according to claim 1 or 2, wherein a removal perforation for tearing from the tape passage hole to a peripheral edge of the diaper is formed. A belt-like waistline having a width direction intermediate portion and the waist side flap portions respectively provided on both sides in the width direction;
A rear end portion is connected to the middle portion of the waistline body, extends from the back side through the crotch portion to cover the abdominal side, and has an absorption body having the abdominal side portion,
The side edges of the absorbent body are linear along the front-rear direction,
The tape type disposable diaper of any one of Claims 1-3.