JP6315338B2 - Tape type disposable diaper - Google Patents

Description

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

  As a tape-type disposable diaper, for example, a body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and a fastening tape extending laterally from the side flap portion on the back side Are provided (see, for example, Patent Document 1).

  There are also disposable diapers of a type in which a cutting line is formed in a fastening tape so as to be suitable for wearers of various body types (see, for example, Patent Document 2).

  These tape-type disposable diapers are mounted by locking a fastening tape provided on the back side to a member on the abdominal side, for example, a target tape.

  However, in these tape-type disposable diapers, the fastening tape is folded back on the side flap portion and the side flap portion is folded back on the absorbent body in a state before mounting such as during transportation and storage. Therefore, when the disposable diaper is mounted, a two-stage operation of opening the side flap portion to the side and further opening the fastening tape to the side is necessary. This work may not be much trouble if it is only once. However, when it is performed several times a day and every day, it is very troublesome and it is not easy to install.

JP-A-2005-319142 JP 2006-247180 A

  The main subject of this invention is providing the tape type disposable diaper with easy mounting | wearing.

The present invention that has solved the above problems is as follows.
< Reference invention>
A body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and folded back onto the absorber; a side flap portion extending laterally from the side flap portion; and on the side flap portion A tape-type disposable diaper provided with a fastening tape folded back into
The fastening tape has a convex shape from the distal end side toward the proximal end side, and a cut line is formed across the folding line of the fastening tape,
When the tab piece surrounded by the cut line is pulled to the side, the folded side flap portion is opened to the side, and the fastening tape is also opened to the side.
A tape-type disposable diaper characterized by that.

(Function and effect)
The fastening tape has a convex shape from the front end side to the base end side, and a cut line is formed across the folding line of the fastening tape. When the tab piece surrounded by the cut line is pulled to the side, it is folded back. If the side flap portion is opened to the side, and the fastening tape is also opened to the side, the above-described two-stage operation when the disposable diaper is mounted becomes unnecessary, and the mounting becomes easy.

<Invention of Claim 3 >
It is a body side surface of the fastening tape, and at least the tab piece is provided with a locking material for locking the back side and the abdomen side of the side flap part.
The tape-type disposable diaper according to claim 1 or 2 .

(Function and effect)
It is the body side surface of the fastening tape, and at least the tab piece is provided with a locking material for locking the back side and the abdomen side of the side flap portion. The locking member provided in the piece faces the outer surface side (the side opposite to the body side surface). Therefore, the said locking material can be fixed to the place which spread disposable diapers, such as a floor and a bed. Therefore, for example, shrinkage in the width direction of the disposable diaper can be suppressed and the wearing of the disposable diaper becomes easy.

<Invention of Claim 1 >
A body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and folded back onto the absorber; a side flap portion extending laterally from the side flap portion; and on the side flap portion A tape-type disposable diaper provided with a fastening tape folded back into
The fastening tape has a convex shape from the distal end side toward the proximal end side, and a cut line is formed across the folding line of the fastening tape,
When the tab piece surrounded by the cut line is pulled to the side, the folded side flap portion is opened to the side, and the fastening tape is also opened to the side.
On the body side surface of the fastening tape, a locking material for locking the back side and the abdomen side of the side flap portion is provided, and at least one end point of the incision line is in a region where the locking material is provided. To position,
A tape-type disposable diaper characterized by that .

(Function and effect)
The fastening tape is provided with a locking material for locking the back side and the abdominal side of the side flap portion on the body side surface of the fastening tape, and at least one end point of the score line, preferably both, in the area where the locking material is provided When the end point of is located, it is possible to prevent the fastening tape from being avoided starting from the end point of the cut line when the tab piece is pulled to the side.

<Invention of Claim 2 >
A body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and folded back onto the absorber; a side flap portion extending laterally from the side flap portion; and on the side flap portion A tape-type disposable diaper provided with a fastening tape folded back into
The fastening tape has a convex shape from the distal end side toward the proximal end side, and a cut line is formed across the folding line of the fastening tape,
When the tab piece surrounded by the cut line is pulled to the side, the folded side flap portion is opened to the side, and the fastening tape is also opened to the side.
On the body side surface of the fastening tape, a locking material for locking the back side and the abdomen side of the side flap portion is provided, and both end points of the incision line are on the side of the side edge of the locking material. A cutting line is formed on the fastening tape, located and connecting both end points,
A tape-type disposable diaper characterized by that .

(Function and effect)
On the body side surface of the fastening tape, a locking material for locking the back side and the abdomen side of the side flap portion is provided, and both end points of the incision line are located on the side of the side edge of the locking material, If a cutting line connecting both end points is formed on the fastening tape, the tab piece can be cut off after the disposable diaper is mounted.

  As mentioned above, according to this invention, it becomes a tape type disposable diaper with easy mounting | wearing.

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. (1) is the top view in the state which unfolded the diaper which shows the state which the fastening tape opened, (2) which shows the state by which the fastening tape was folded on the side flap part. (1) is the sectional view on the AA line of FIG. 8 (1), (2) is sectional drawing which shows the state by which the fastening tape and the side flap part were return | folded on the absorber. The drawing on the right side of the drawing is a schematic diagram showing the relationship between the fastening tape, the side flaps, and the absorber. (1) is a sectional view taken along line BB in FIG. 8 (2), and (2) is a sectional view taken along line CC in FIG. 8 (2). The drawing on the right side of the drawing is a schematic diagram showing the relationship between the fastening tape, the side flaps, and the absorber. (1) is a perspective view which shows the progress in the middle of pulling a tab piece to the side, (2) is sectional drawing which shows the state which pulled the tab piece to the side. The drawing on the right side of the drawing is a schematic diagram showing the relationship between the fastening tape, the side flaps, and the absorber. It is a modification of the end point position of a cut line. It is a modification of the shape of a score line. It is explanatory drawing of the example of formation of a cut line.

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, The dot pattern portion indicates the application portion of the hot melt adhesive.

  This tape-type disposable diaper is a part that extends from the lower abdomen through the crotch part to cover the buttocks along the center in the width direction, and the liquid-permeable top sheet 30 that forms the body side surface, and the outer surface An absorbent main body 10 which is a part where the absorbent element 50 is interposed between the liquid-impermeable sheet 11 located on the side and a part extending to the front side and the rear side of the absorbent main body part 10 respectively. And a ventral end flap portion EF and a dorsal end flap portion EB, which are portions that do not have the absorption element 50.

  Moreover, this tape-type disposable diaper has a pair of side flap parts SF and SF that extend laterally from the side edge of the absorbent body 56, and the side flap parts SF and SF on the back side have a fastening tape. 13 are provided.

  More specifically, the entire outer surface of the absorbent main body 10 and the side flap portions SF, SF is formed by the exterior sheet 12. In particular, in the absorbent main body 10, 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, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the liquid-permeable top sheet 30 are laminated in this order. The liquid-permeable 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 the absorbent element in the liquid-permeable top sheet 30 The peripheral edge protruding from the side edge 50 and the peripheral edge protruding 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 liquid-permeable top sheet 30.

  Further, on both sides of the absorbent main body 10, side solid gathers 60, 60 that protrude (stand up) toward the wearer's skin are provided, and a gather sheet 62 that forms the side solid gathers 60, 60. , 62 are fixed in a range from the both side portions of the liquid-permeable top sheet 30 to the inner surfaces of the side flap portions SF, SF.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet 12)
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center part in the front-rear direction on both sides is constricted, and this is a part that surrounds the wearer's leg.

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 impermeable sheet 11)
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.

(Liquid-permeable top sheet 30)
The liquid-permeable top sheet 30 only needs to have liquid permeability, and for example, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like 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.

  Moreover, the liquid-permeable top sheet 30 may consist of one sheet, or may consist of a laminated sheet obtained by bonding two or more sheets. Similarly, the liquid-permeable top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet 40)
An intermediate sheet (also referred to as a second sheet) 40 is provided between the liquid-permeable top sheet 30 and the absorbent element 50 in order to move excrement that has permeated through the liquid-permeable top sheet 30 to the absorber 56 and prevent reversal. Can do. This intermediate sheet 40 not only improves the absorption performance by the absorbent body 56 by quickly transferring the excrement to the absorbent body 56, but also prevents the excreted absorbed body from returning from the absorbent body 56, and the liquid-permeable top sheet. 30 The surface is improved. The intermediate sheet 40 can be omitted.

  As the intermediate sheet 40, the same material as the liquid-permeable top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the liquid-permeable top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 has the same melting point as the liquid-permeable top sheet 30. Those are preferred. In consideration of allowing the solid content in the stool to permeate, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid remaining in the liquid-permeable top sheet 30 is large. Become. 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 liquid-permeable top sheet 30 is hardly generated, but the solid content of the stool is hardly transmitted. 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 of the intermediate sheet 40 in the longitudinal direction may be the same as the total length L 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 solid gather 60)
Side solid gathers 60 that protrude (stand up) on the use surface side on both sides of the product in order to prevent urine and soft stool that move in the lateral direction along the liquid-permeable top sheet 30 and prevent side leakage, 60 is preferably provided.

  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. A water-repellent nonwoven fabric can be used as the gather sheet 62, and a thread rubber or the like can be used as the elongated elastic elastic member 63. As shown in FIG. 1 and FIG. 2, a plurality of the elongated elastic elastic members 63 can be provided, and one each can be provided.

  The inner surface of the gather sheet 62 has a fixing start end in the width direction on the side portion of the liquid-permeable top sheet 30, and a portion on the outer side in the width direction from the fixing start end is the side portion of the liquid-impermeable sheet 11 and its width. It is fixed to a side portion of the exterior sheet 12 located on the outer side in the direction by a hot melt adhesive or the like.

  Around the legs, the width direction inner side from the fixing start end of the side three-dimensional gather 60 is fixed on the liquid-permeable top sheet 30 at both ends in the product front-rear direction, but the portion in between is an unfixed free part. The free portion comes to stand by the contraction force of the elongated elastic elastic member 63. When the diaper is mounted, since the diaper is mounted on the body in the shape of a boat, and the contraction force of the elongated elastic expansion / contraction member 63 acts, the side three-dimensional gather 60 stands up by the contraction force of the elongated elastic expansion / contraction member 63. Adhere closely to the legs. 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 inward in the width direction from an outer portion in the width direction and a center side in the width direction of the base end side portion. 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)
Each side flap portion SF, SF has a leg elastic 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 fixing start of the fixing portions of the gather sheet 62. The stretchable 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 leg elastic member 64 may 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 leg elastic members 64 on each side as shown in the drawing, only one elastic member 64 can be provided on each side.

(Absorbing element 50)
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 56)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and can be set to, for example, 30 to 120 g / m ^{2 in} the case of a filament aggregate. . 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 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.

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 58)
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.

(Fastening tape 13)
As shown in FIG. 8, the fastening tape 13 is a sheet base material having a tape attachment portion 13 </ b> C fixed to the side flap portion SF, and a tape main body portion 13 </ b> B extending laterally with the tape attachment portion 13 </ b> C as a base end. And a locking member 13A provided at an intermediate portion in the width direction of the tape main body 13B in the sheet base material.

  The tape attachment portion 13C is sandwiched between the gather sheet 62 forming the inner layer and the exterior sheet 12 forming the outer layer in the side flap portion SF. The tape attachment portion 13C is usually adhered to both sheets 62 and 12 by hot melt adhesive or the like except for a portion within 5 to 20 mm, for example, from the side edge Z of the side flap portion SF for manufacturing reasons. ing. Further, the locking member 13A is joined to the tape main body part 13B of the sheet base material by an adhesive or the like so as not to be peeled off.

  In the baby diaper, among the dimensions of the tape attachment portion 13C, the length X1 in the diaper width direction is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the length Y1 in the front-rear direction is 20 to 100 mm. In particular, the thickness is preferably 40 to 80 mm.

  Of the dimensions of the tape body 13B, the length X2 in the diaper width direction is preferably 30 to 80 mm, particularly 40 to 60 mm, and the length in the diaper front-rear direction is 20 to 70 mm, particularly 25 to 50 mm. Is preferred. In addition, when a part or all of the fastening tape 13 has, for example, a substantially tapered shape, and the length in the front-rear direction and the length in the width direction are not constant, the above numerical range is determined by an average value.

  The shape of the fastening tape 13 may be a symmetrical shape such as a rectangular shape, but a wide attachment portion (for example, the tape attachment portion 13C in the illustrated example) and an elongated tip side portion (for example, the tape main body in the illustrated example). The convex shape formed of the portion 13C.) Is preferable because the fastening tape 13 can be easily picked and the tension between the left and right base portions acts over a wide range.

  As the locking member 13A, a hook material (male material) of a mechanical fastener (surface fastener) is suitable. The hook material has a large number of engaging protrusions on its surface. 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 be provided as the locking member 13A of the fastening tape 13.

Moreover, as a sheet | seat base material which forms the tape attachment part 13C and the 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 diaper is worn, the fastening tape 13 is locked at a suitable position on the outer surface of the abdominal side F with the side flap portion SF on the back side B overlapped on the outside of the side flap portion SF on the abdominal side F. The position and size of the fastening portion of the fastening tape 13 can be arbitrarily determined. 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 (front-rear direction) between the upper edge of the top and the upper edge of the ventral side F is 0 It is preferably 60 mm, particularly 20 to 50 mm, and the center in the width direction of the product.

  When the fastening tape 13 is attached so that the tape attachment part 13C straddles the boundary line between the end flap part EB on the back side B and the absorbent element 50, due to the tension acting between the left and right tape attachment parts 13C when the diaper is attached. This is preferable because the end of the dorsal side B of the absorbent element 50 is firmly pressed against the body.

  In addition, if the tape attachment portion 13C is too far from the edge on the back side of the diaper, the tension acting between the left and right tape attachment portions 13C when the diaper is attached does not reach the edge on the back side B of the diaper. A gap is likely to occur between the end of the back side B of the diaper and the body surface. Therefore, the length in the front-rear direction of the end flap portion EB on the back side B is preferably the same as or shorter than the length in the front-rear direction of the tape attachment portion 13C.

Next, the characteristic site | part of this form regarding the fastening tape 13 is demonstrated in detail.
FIG. 8 (1) and FIG. 9 (1) show the fastening tape 13 for clarifying the features of this embodiment. The fastening tape 13 has a convex shape from the distal end side toward the proximal end side, and a fold line of the fastening tape 13, in this example, a cut line 13 </ b> D straddling the side edge Z of the side flap portion SF is formed. A region surrounded by the cut line 13D is a tab piece 13T.

  The fastening tape 13 is folded on the side flap portion SF as shown in FIGS. 8 (2) and 10 in a state before mounting such as during transportation and storage. Furthermore, as shown in (2) of FIG. 9, the fastening tape 13 is folded on the absorber 56 together with the side flap portion SF in the state before the mounting.

  In the disposable diaper of this embodiment provided with the fastening tape 13, when the tab piece 13T is pulled to the side when the diaper is mounted, the side flaps folded on the absorber 56 as shown in FIG. The part SF and the fastening tape 13 are opened to the side, and the fastening tape 13 is opened to the side as shown in (1) of FIG. 11 and the final state in (2) of FIG. Therefore, when the disposable diaper is mounted, the above-described two-stage operation is not necessary, and the mounting is easy.

  Further, in the fastening tape 13 of the present embodiment, the tabs in the state where the side flap portion SF is folded back on the absorbent body 56 as shown in FIG. 8 (2) due to the rigidity of the sheet base material of the fastening tape 13 or the like. The extending portion 13U straddling the side edge (folding line) Z of the side flap portion SF of the piece 13T is in a state of extending sideways. This extended state is maintained even when the side flap portion SF and the fastening tape 13 are folded back on the absorber 56 as shown in (2) of FIG. 9, and the extended portion 13U is located on the side flap portion SF side. The state extends from the edge (folding line) Z. Therefore, the extending portion 13U can be easily grasped, and the tab piece 13T can be easily pulled sideways.

  In the fastening tape 13 of this embodiment, as shown in FIG. 9 (1), the locking member 13A is also provided on the body side surface of the tab piece 13T. Therefore, when the tab piece 13T is pulled to the side, as shown in FIG. 11 (2), the locking member 13A located on the tab piece 13T faces the outer surface side (opposite to the body side surface). It will be. Therefore, the locking member 13A can be fixed to a place where a disposable diaper such as a floor or a bed is spread. As a result, for example, shrinkage in the width direction of the disposable diaper can be suppressed, and the disposable diaper can be easily attached.

  In the fastening tape 13, it is preferable that at least one end point of the cut line 13 </ b> D is located in the region where the locking member 13 </ b> A is provided, and it is more preferable that both end points 13 </ b> E are located as in the illustrated example. When the end point 13E of the cut line 13D is located in the region where the locking member 13A is provided, the sheet base material is torn when the tab piece 13T is pulled sideways, starting from the end point 13E of the cut line 13D. Can be prevented.

  However, if tearing of the sheet base material does not become a problem, as shown in (1) of FIG. 12, both of the cut lines 13D are formed on the side of the side edge Z1 on the side of the locking member 13A. It is also preferable that the end point 13E is located and the cut line 13R is formed on the sheet base so as to connect both the end points 13E. According to this embodiment, there is an advantage that the tab piece 13T can be cut off after the disposable diaper is mounted.

  Note that the end point 13E of the cut line 13D can also be positioned inward of the side edge Z2 on the inward side of the locking member 13A, as shown in (2) of FIG. Also in this form, the two-stage operation described above is not necessary, and the diaper can be easily attached.

  In this embodiment, the shape of the cut line 13D is not particularly limited as long as it is a convex shape. For example, as shown in (1) of FIG. 13, the shape of the extending portion 13 </ b> U constituting the front end of the sheet main body 13 </ b> B widens, or from the front end side of the fastening tape 13 as shown in (2) of FIG. 13. A shape that gradually decreases toward the base end side (the length in the diaper front-rear direction gradually decreases), and gradually increases from the front end side toward the base end side as shown in FIG. The shape etc. which the length regarding the diaper front-back direction becomes long gradually can be considered. In the form (such as the form (2) in FIG. 13) of the fastening tape 13 that gradually decreases from the distal end side toward the proximal end side, the extending portion 13U is formed when the fastening tape 13 is folded back onto the side flap portion SF. It has advantages such as being easy to extend (protrude) from the folding line Z, and being difficult to remove the tab piece 13T from the sheet base material, and gradually from the distal end side of the fastening tape 13 toward the proximal end side. 13 (form of (3) in FIG. 13) has the advantage that it becomes easy to pinch the extension 13U, and the form in which the extension 13U expands (form of (1) in FIG. 13). Etc.) have both advantages.

  In this embodiment, for example, the continuous band 13L of the fastening tape 13 provided with the locking member 13A is cut into a wave shape (wave cut) in a cutter unit such as a tape round cutter and divided into two by a tape sticking device or the like. One is a continuous band of one fastening tape 13 in the left-right direction, and the other is a continuous band of the other fastening tape 13 in the left-right direction. These continuous bands are appropriately cut (divided cut) to form individual fastening tapes 13. On the other hand, a cut line 13D is formed in the continuous band 13L of the fastening tape 13. Unlike the above-described form, the cut line 13D is arranged so that both end points 13E are line symmetric. Specifically, for example, as shown in FIG. 14, one end point 13E of the cut line 13D is locked. It can also be formed so as to straddle the side edges Z1, Z2 on one side of the material 13A and the other end point 13E to be located on the periphery of the fastening tape 13. According to this embodiment, the cut lines 13 can be formed every other line, and the manufacturing can be facilitated. The cut line 13D is for extending the extending portion 13U to the side when the disposable diaper is folded, and the extending portion 13U is primarily formed by the two-stage described above. This is to make work unnecessary. Therefore, there is no possibility that a large force is applied to the extending portion 13U (tab piece 13T) in relation to this purpose, and there is no possibility that inconvenience occurs even if the end points 13E are not line symmetric.

  The above-described wave cutting, dividing cut, and formation of the cut line 13D are not particularly limited in order of execution, and can be performed simultaneously or sequentially.

(Target sheet 12T)
It is preferable to provide a target sheet 12T having a target for facilitating the locking at the locking position of the fastening tape 13 on the ventral side F. As the target sheet 12T, when the locking portion 13A is a hook material, a target sheet 12T can be used in which a large number of loop yarns are formed on the surface of a sheet base 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 the pressure-sensitive adhesive layer, a sheet substrate made of a plastic film having a smooth surface that is rich in adhesiveness and subjected to a release treatment can be used. Further, when the fastening portion of the fastening tape 13 on the ventral side F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric, and the locking portion 13A of the fastening tape 13 is a hook material, The target sheet 12T can be omitted, and the hook material can be entangled with the nonwoven fabric of the exterior sheet 12 and locked.

(End flaps EF, EB)
The end flap portions EF and EB are portions that extend to the front side and the rear side of the absorbent main body portion 10 respectively, and are portions that do not have the absorbent element 50, and the front side extended portion is a ventral end flap portion. It is EF, and the rear extension part is the back end flap part EB.

  The length in the front-rear direction of the back end flap EB is preferably the same or shorter than the length Y1 in the front-rear direction of the tape mounting portion 13C of the fastening tape 13 for the reasons described above. When the absorption element 50 is too close to each other, a gap is likely to be generated between the end of the diaper on the back side of the diaper and the body surface due to the thickness and stiffness of the absorption element 50, so that the thickness is preferably 10 mm or more.

  The length of the ventral end flap portion EF and the back end flap portion EB in the front-rear direction of the diaper is preferably 5 to 20% of the front-rear direction length (total length of the diaper) L of the diaper. Is suitably 10 to 60 mm, especially 20 to 50 mm.

(Back elastic sheet 70)
In the illustrated embodiment, a belt-like back-side elastic sheet 70 that elastically expands and contracts in the width direction is provided between the pair of fastening tapes 13 to improve the fit in the diaper back side. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portion (tape attachment portion 13C) of the pair of fastening tapes 13, but may be separated to the center in the width direction. It is appropriate that the longitudinal dimension of the back elastic sheet 70 is substantially the same as the longitudinal dimension of the fastening tape 13 attachment portion (tape attachment portion 13C), but there is a dimensional difference of -20% to + 20%. May be. Moreover, when the back side elastic sheet 70 is arrange | positioned so that it may overlap with the boundary line of the back side end flap EB and the absorption element 50 like illustration, the back side edge part of the absorption element 50 is pressed firmly on a body. Therefore, it is preferable. The back-side elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but 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, the sheet base material 71 such as two nonwoven fabrics is bonded with an adhesive such as a hot melt adhesive. It is preferable that the elastic stretch member 72 such as a perforated sheet, net, or elongated (thread-like or string-like) or the like is fixed in a stretched state in the width direction between the sheet base materials 71 while being laminated. Used. As the sheet base 71 in this case, the same one as the exterior sheet 12 can be used. The elongation rate of the elastic elastic member 72 is preferably 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 5 to 15 members having a thickness of 420 to 1120 dtex with an interval 72d of 3 to 10 mm.

  In addition, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorbent element 50 as shown in the figure because the fitting property of the absorption element 50 is improved, but in this case, the elastic expansion / contraction member 72 is used. If the contraction force is prevented from acting on a part or all of the overlapping portion by means such as cutting, the back end of the absorbent element 50 does not contract in the width direction, so that the fit is further improved.

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

  In the illustrated embodiment, the back-side stretchable sheet 70 is sandwiched between the gather sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11 and overlaps with the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the permeable sheet 11 and the absorbent element 50, it may be provided between the liquid-impermeable sheet 11 and the exterior sheet 12, or provided on the outer surface of the exterior sheet 12. Alternatively, it may be provided between the liquid-permeable top sheet 30 and the absorbent element 50. Further, the back-side elastic sheet 70 may be provided on the liquid-permeable top sheet 30. In this case, the back-side elastic sheet 70 may be provided on the gather sheet 62 on both sides in the width direction of the liquid-impermeable sheet 11. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet base materials, the entire back-side stretchable sheet 70 may be provided between the sheet base materials of the exterior sheet 12.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
The “front / rear (vertical) direction” means a direction connecting the ventral side (front side) and the back side (rear side), and the “width direction” means a direction (left / right direction) orthogonal to the front / rear direction.

  “Elongation rate” means a value when the natural length is 100%.

  ・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight state using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.

- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 10 gf / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.

  -The amount of water absorption is measured according to JIS K7223-1996 "Test method for water absorption of superabsorbent resin".

  ・ The water absorption rate is the “time to end point” when JIS K7224-1996 “Test method for water absorption rate of superabsorbent resin” is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .

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

  DESCRIPTION OF SYMBOLS 10 ... Absorbing main-body part, 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 12T ... Target sheet, 13 ... Fastening tape, 13A ... Locking material, 13B ... Tape main-body part, 13C ... Tape attaching part, 13D ... Cut line, 13E ... End point of cut line, 13L ... Continuous band of fastening tape, 13T ... Tab piece, 13U ... Extension part, 13R ... Cut line, 30 ... Liquid top sheet, 40 ... Intermediate sheet, 50 ... Absorption Element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side solid gather, 62 ... Gather sheet, 63 ... Elongated elastic elastic member, 64 ... Elastic elastic member around leg, 70 ... Back elastic sheet, 71 ... Sheet Base material 72 ... Elastic elastic member 80 ... Indicator B ... Back side EB ... Back side end flap, EF ... Ventral side end flap, F ... Ventral side, L ... Total length of diaper, SF Side flap portion, X: full width of the diaper, X1: length of the tape attachment portion in the diaper width direction, X2: length of the tape body portion 13B in the diaper width direction, Y1: length of the tape attachment portion in the diaper front-rear direction, Z: side edge of side flap portion, Z1: side edge on side of locking material, Z2: side edge on inner side of locking material.

Claims (3)

A body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and folded back onto the absorber; a side flap portion extending laterally from the side flap portion; and on the side flap portion A tape-type disposable diaper provided with a fastening tape folded back into
The fastening tape has a convex shape from the distal end side toward the proximal end side, and a cut line is formed across the folding line of the fastening tape,
When the tab piece surrounded by the cut line is pulled to the side, the folded side flap portion is opened to the side, and the fastening tape is also opened to the side.
On the body side surface of the fastening tape, a locking material for locking the back side and the abdomen side of the side flap portion is provided, and at least one end point of the incision line is in a region where the locking material is provided. To position,
A tape-type disposable diaper characterized by that . A body fluid absorber, a side flap portion extending laterally from the side edge of the absorber, and folded back onto the absorber; a side flap portion extending laterally from the side flap portion; and on the side flap portion A tape-type disposable diaper provided with a fastening tape folded back into
The fastening tape has a convex shape from the distal end side toward the proximal end side, and a cut line is formed across the folding line of the fastening tape,
When the tab piece surrounded by the cut line is pulled to the side, the folded side flap portion is opened to the side, and the fastening tape is also opened to the side.
On the body side surface of the fastening tape, a locking material for locking the back side and the abdomen side of the side flap portion is provided, and both end points of the incision line are on the side of the side edge of the locking material. A cutting line is formed on the fastening tape, located and connecting both end points,
A tape-type disposable diaper characterized by that . It is a body side surface of the fastening tape, and at least the tab piece is provided with a locking material for locking the back side and the abdomen side of the side flap part.
The tape-type disposable diaper according to claim 1 or 2 .

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