JP5882648B2 - Tape type disposable diaper - Google Patents

Description

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

  The tape-type disposable diaper has a liquid-permeable top sheet, a liquid-impervious sheet located on the back side thereof, and a lower portion along the center in the width direction between the liquid-permeable top sheet and the liquid-impermeable sheet. It is equipped with an absorber that extends from the abdomen through the crotch to the buttocks, and a fastening tape provided on both sides of the dorsal side, and is attached by locking the fastening tape to the outer side of the abdomen. In general, a structure in which so-called three-dimensional gathers extend along the front-rear direction on both sides in the width direction and the outer surface is covered with an exterior sheet made of a nonwoven fabric (see, for example, Patent Document 1).

  Further, in such a tape-type disposable diaper, the base of the fastening tape is sandwiched between an exterior sheet that constitutes the outer surface of the diaper and a gather sheet that constitutes a three-dimensional gather, and the exterior sheet and the gather are separated by a hot melt adhesive. The structure is fixed to the sheet and the liquid-impermeable sheet does not reach the base of the fastening tape, but the base of the fastening tape extends to the position where it overlaps the side of the liquid-impermeable sheet. This has also been proposed (see Patent Document 2).

  However, in any case, if the base material is made of a thin and flexible nonwoven fabric to make the fastening tape flexible, the strength of the tape itself will decrease, and the tape itself may be broken when the fastening tape is pulled strongly. However, there is a problem that it is easy to come off (e.g., come off), and this problem has been a barrier to improving the flexibility of the fastening tape, and thus the flexibility of the entire tape-type disposable diaper.

JP-A-2005-319142 JP 2007-167368 A

  Therefore, a main problem of the present invention is to prevent the fastening tape from being broken or detached.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In a tape-type disposable diaper configured to be worn by fastening the fastening tape provided on both sides of the back side to the ventral side outer surface,
The fastening tape has an inner tape and an outer tape located outside the inner tape,
The inner tape includes an inner tape mounting portion fixed to both sides on the back side, an inner tape main body portion protruding from the inner tape mounting portion, and a ventral outer surface provided on the inner surface of the inner tape main body portion. And a locking portion with respect to
The outer tape has an outer tape mounting portion that partially or entirely overlaps with the inner tape mounting portion, and an outer tape main body portion that protrudes from the outer tape mounting portion and partially or entirely overlaps with the inner tape main body portion. And
On both sides of the dorsal side, the sheet other than the fastening tape has three or more layers, and the inner and outer tape attaching portions overlap each other and have a laminated adhesive portion bonded to each other.
In the laminated adhesive portion, between said inner tape mounting portion and an outer tape attaching portion, the fastening tape other sheet is sandwiched least one layer Rutotomoni, outside the inner and the outer tape attaching portion of the inner tape mounting portion Each one or more sheets other than the fastening tape are arranged ,
A tape-type disposable diaper characterized by that.

(Function and effect)
In the present invention, since the fastening tape has a double structure of the inner tape and the outer tape, when both the inner tape and the outer tape are picked and pulled, the force is distributed to both the inner tape and the outer tape, A decrease in strength of the entire fastening tape can be suppressed, and tearing can be effectively prevented. Moreover, since the area of the attachment part as the whole fastening tape also becomes large, it becomes difficult to remove | deviate. As a result, it is possible to use a flexible material for each of the inner tape and the outer tape, or to reduce the amount of adhesive used to fix the inner tape attachment portion and the outer tape attachment portion, and the fastening tape itself and The attachment portion can be further flexible.

<Invention of Claim 2>
The inner tape attachment portion and the inner tape body portion in the inner tape, and the outer tape attachment portion and the outer tape body portion in the outer tape have a tensile strength in the width direction of 10 to 150 N / 50 mm and a bending resistance of 20 to 150 mm. The tape-type disposable diaper according to claim 1, which is formed of / 20 mm nonwoven fabric.

(Function and effect)
Thus, by using a flexible material as the individual material of the inner tape and the outer tape, the entire tape can be made flexible, and even in that case, the double structure of the inner tape and the outer tape Thus, a decrease in strength can be suppressed.

<Invention of Claim 3>
The inner tape attachment portion and the inner tape main body portion of the inner tape, and the outer tape attachment portion and the outer tape main body portion of the outer tape each have a fineness of 1.0 to 3.5 dtex and a basis weight of 20 to 100 g / m ² . The tape type disposable diaper of Claim 2 which is a nonwoven fabric, an SMS nonwoven fabric, a point bond nonwoven fabric, or a spunlace nonwoven fabric.

(Function and effect)
The material of the inner tape and the outer tape is not particularly limited, but such a nonwoven fabric is preferable.

<Invention of Claim 4>
A liquid-permeable top sheet;
A liquid-impermeable sheet located on the back side;
An absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet and extending from the lower abdomen to the groin along the center in the width direction,
On the both sides in the width direction on the inner surface, each comprising a three-dimensional gather extending along the front-rear direction, and an exterior sheet made of a nonwoven fabric covering the outer surface of the liquid-impermeable sheet,
A sheet other than the fastening tape is a gather sheet constituting the three-dimensional gather, the liquid-impermeable sheet, and the exterior sheet,
In the laminated adhesive part, the liquid-impermeable sheet is sandwiched as a sheet other than the fastening tape between the inner tape attaching part and the outer tape attaching part ,
The gather sheet is arranged as a sheet other than the fastening tape inside the inner tape attaching portion,
The exterior sheet is arranged as a sheet other than the fastening tape on the outside of the outer tape attachment portion ,
The tape type disposable diaper of any one of Claims 1-3.

(Function and effect)
When there are laminated adhesive parts with such a structure on both sides on the back side, if the laminated structure has a liquid-impermeable sheet sandwiched between the inner tape attaching part and the outer tape attaching part, the fastening tape is more difficult to come off. It will be one more thing. In addition, if the side edge of the liquid-impermeable sheet and the base end of the fastening tape are separated from each other, the separated portion has low strength, so that breakage along the base end of the fastening tape is likely to occur. When a laminated structure in which a liquid-impermeable sheet is sandwiched between the tape mounting portion and the outer tape mounting portion, the side edge of the liquid-impermeable sheet and the base end of the fastening tape are not separated from each other. Breaking along the edges is also effectively prevented.

<Invention of Claim 5>
A liquid-permeable top sheet;
A liquid-impermeable sheet located on the back side;
An absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet and extending from the lower abdomen to the groin along the center in the width direction,
Three-dimensional gathers extending along the front-rear direction on both sides in the width direction on the inner surface, and an exterior sheet made of a nonwoven fabric covering the outer surface of the liquid-impermeable sheet,
Provided with a belt-like back side elastic sheet provided in the back side portion and extending along the width direction;
A sheet other than the fastening tape is a gather sheet that constitutes the three-dimensional gather, the back-side stretchable sheet, and the exterior sheet,
In the laminated adhesive part, the back elastic sheet is sandwiched between the inner tape attaching part and the outer tape attaching part as a sheet other than the fastening tape ,
The gather sheet is arranged as a sheet other than the fastening tape inside the inner tape attaching portion,
The exterior sheet is arranged as a sheet other than the fastening tape on the outside of the outer tape attachment portion ,
The tape type disposable diaper of any one of Claims 1-3.

(Function and effect)
When there are laminated adhesive parts with such a structure on both sides on the back side, the laminated tape with the back side elastic sheet sandwiched between the inner tape attaching part and the outer tape attaching part makes the fastening tape more difficult to come off. Will be. Also, if the side edge of the back elastic sheet and the base end of the fastening tape are separated from each other, this separated portion has low strength, so that breakage along the base end of the fastening tape is likely to occur. When the laminated structure sandwiches the back side elastic sheet between the attaching part and the outer tape attaching part, the side edge of the back side elastic sheet and the base end of the fastening tape are not separated from each other. Breaking is also effectively prevented.

<Invention of Claim 6>
The gather sheet is an air-through nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric having a fineness of 1.2 to 3.5 dtex and a basis weight of 8 to 35 g / m ² .
Before outer sheet is a fineness 1.2～3.5Dtex, basis weight 8~35g / m ² spunbond nonwoven or spunbonded nonwoven fabric layers in the layered nonwoven fabric sandwiching the melt blown nonwoven fabric layer,
The tape type disposable diaper of any one of Claims 1-5.

(Function and effect)
When a gather sheet and an exterior sheet are such a flexible nonwoven fabric, the fracture | rupture along the base end of a fastening tape tends to generate | occur | produce. Therefore, this invention is suitable when using such a raw material.

  As described above, according to the present invention, advantages such as being able to prevent the fastening tape from being broken or detached are brought about.

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. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a top view which shows the structure of a fastening tape roughly. It is a flowchart of a manufacturing method. It is a flowchart of a manufacturing method.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Example of structure>
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 is a portion that extends from the lower abdomen along the center in the width direction through the crotch to cover the buttocks, and a liquid-permeable top sheet that forms the body side surface, and the outer surface side An absorbent main body 10 that is a part where the absorbent element 50 is interposed between the liquid-impermeable sheet located in the liquid-impervious sheet, and a part that extends to the front side and the rear side of the absorbent main body part 10 respectively, and It has a ventral end flap part FE and a dorsal end flap part BE, which are parts that do not have the absorbent element 50.

  Moreover, this tape-type disposable diaper has a pair of side flap parts SF and SF extending laterally from the side edge of the absorber, and the fastening tape 13 is provided on the side flap parts SF and SF on the back side. 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 top sheet 30 are laminated in this order. 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.

  Further, on both sides of the absorbent main body 10, three-dimensional gathers 60, 60 projecting (standing) to the wearer's skin side are provided, and gather sheets 62, 62 forming the three-dimensional gathers 60, 60 are provided. Further, the top sheet 30 is fixed to the range from the both side portions of the top sheet 30 to the inner surfaces of the side flap portions SF and SF.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
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 into which the wearer's leg is placed.
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 12 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 improves the absorption performance by the absorber by quickly transferring the excrement to the absorber, but also prevents the excretion of the absorbed excrement from returning from the absorber, making the top sheet 30 surface feel better 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 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 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.

(Three-dimensional gather)
In order to prevent urine and soft stool that move in the lateral direction along the top sheet 30 and prevent side leakage, the three-dimensional gathers 60 and 60 that protrude (stand up) on the use surface side are provided on both sides of the product. preferable.
The three-dimensional gather 60 is a three-dimensional gather elastic expansion / contraction composed of a gather sheet 62 that is substantially continuous in the width direction, and an elongated elastic expansion / contraction member such as a rubber thread that is fixed to the gather sheet 62 in a stretched state along the front-rear direction. The member 63 is comprised. A water-repellent nonwoven fabric can be used as the gather sheet 62, and a plurality of three-dimensional gather elastic elastic members 63 can be provided as well as a plurality of ones as shown in FIGS.
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. Among these fixed portions, on the outer side in the width direction in the vicinity of the fixed start end, between the sheets of the portions where the gather sheet 62 and the exterior sheet 12 face each other, the planar gather elasticity composed of an elongated elastic elastic member such as thread rubber along the front-rear direction. Each elastic member 64 is provided.
In the circumference of the leg, the width direction inner side from the fixing start end of the 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, and this free part is The three-dimensional gather elastic elastic member 63 stands up due to the contraction force. At the time of wearing the diaper, the diaper is attached to the body in the shape of a boat, and the contraction force of the three-dimensional gather elastic elastic member 63 acts, so that the three-dimensional gather 60 stands up by the contraction force of the three-dimensional gather elastic elastic member 63. Adhere to the surroundings. 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.

(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, 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, 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.

(Fastening tape)
As shown in FIGS. 1, 2, and 7, the fastening tapes 13 and 14 have a double structure including an inner tape 13 and an outer tape 14 positioned outside the inner tape 13. The inner tape 13 is provided on the inner tape mounting portion 13C fixed to the back side flap portion SF, the inner tape main body portion 13B protruding from the inner tape mounting portion 13C, and the inner surface of the inner tape main body portion 13B. In addition, it has a locking portion 13A for the ventral outer surface. The outer tape 14 includes an outer tape mounting portion 14C that partially or entirely overlaps with the inner tape mounting portion 13C, and an outer tape that protrudes from the outer tape mounting portion 14C and partially or entirely overlaps with the inner tape main body portion 13B. And a main body portion 14B. The inner tape main body 13B and the outer tape main body 14B may be non-bonded as shown in FIG. 7 (a) or may be bonded as shown in FIG. 7 (b).

  The dimensions and shapes of the inner tape 13 and the outer tape 14 can be determined as appropriate. At least one of them is made different as shown in FIGS. 12 (a) and 12 (b), and the dimensions are the same as shown in FIG. 12 (c). You can also. In particular, when the locking portion 13A is a hook material (male material) of a mechanical fastener (surface fastener), and the hook material exists up to the upper and lower edges (waist side and crotch side ends) of the tape main body portion. 12 (a) and 12 (b), the upper and lower edges of the main body of the outer tape 14 protrude from the upper and lower edges of the inner tape 13 to form a cover portion 14V. If it is configured to cover the corners and edges of the hook material of the tape 13, it becomes difficult for the corners and edges of the hook material to touch the skin, and the upper and lower edges of the fastening tapes 13 and 14 are only the outer tape 14 at least in the cover portion 14V. A flexible part consisting of From this point of view, the cover portion 14V preferably extends over the entire periphery of the inner tape main body 13B as shown in FIG. 12A, but as shown in FIG. The cover portion 14V may not be provided at the tip.

  In the diaper DP for infants, among the dimensions of the inner tape attaching part 13C and the outer tape attaching part 14C, the length in the width direction of the diaper DP is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the length in the front-rear direction. Is preferably 20 to 100 mm, particularly preferably 40 to 80 mm. Of the dimensions of the inner tape main body portion 13B and the outer tape main body portion 14B, the length of the diaper DP in the width direction is preferably 30 to 80 mm, and particularly preferably 40 to 60 mm, and the length (height) in the front-rear direction. Is preferably 20 to 70 mm, more preferably 25 to 50 mm. In addition, when a part or all of the fastening tapes 13 and 14 have, 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 numerical range is determined by an average value. The shape of the fastening tapes 13 and 14 may be a left-right symmetrical shape such as a rectangular shape, but if it is a convex shape consisting of a wide attachment portion and an elongated tip side portion, the knob on the tip side portion can be easily picked, And since the tension | tensile_strength between right-and-left base parts acts on a wide range, it is preferable.

  Further, in the portion where the inner tape attachment portion 13C and the outer tape attachment portion 14C overlap, three or more sheets other than the fastening tapes 13 and 14 are provided, and these overlap with the inner tape attachment portion 13C and the outer tape attachment portion 14C. In addition, a laminated adhesive portion 15 having five or more layers bonded to each other is configured, and in the laminated adhesive portion 15, a sheet other than the fastening tapes 13 and 14 is provided between the inner tape attaching portion 13C and the outer tape attaching portion 14C. Is sandwiched more than one layer.

  Thus, when the fastening tapes 13 and 14 have a double structure of the inner tape 13 and the outer tape 14, when both the inner tape 13 and the outer tape 14 are picked and pulled, the inner tape 13 and the outer tape 14, the force is distributed to both of them, and the strength of the fastening tapes 13 and 14 as a whole can be prevented from being lowered, and tearing can be effectively prevented. Moreover, since the area of the attaching part as the fastening tape 13 and 14 whole becomes large, it becomes difficult to remove | deviate. As a result, it is possible to use a flexible material for each of the inner tape 13 and the outer tape 14, or to reduce the amount of adhesive used to fix the inner tape attaching portion 13C and the outer tape attaching portion 14C. It becomes possible to make the fastening tapes 13 and 14 and their attachment portions more flexible.

The lamination form of the laminated adhesive portion 15 can be determined as appropriate. When the back side elastic sheet 70 (described later) is provided as shown in FIGS. 2 and 5, the exterior sheet 12, in order from the bottom as shown in FIG. The outer tape attachment portion 14C, the back elastic sheet 70, the inner tape attachment portion 13C, and the gather sheet 62 can be laminated . As a reference form, as shown in FIG. 8A, the outer tape attaching portion 14C, the exterior sheet 12, the liquid-impermeable sheet 11, the back side elastic sheet 70, the gather sheet 62, and the inner tape attaching portion 13C are sequentially arranged from the bottom. As shown in FIG. 8B, it is also possible to stack the outer tape attachment portion 14C, the exterior sheet 12, the back elastic sheet 70, the gather sheet 62, and the inner tape attachment portion 13C in order from the bottom. It is done. As shown in FIG.8 (c), the exterior sheet 12, the outer side tape attachment part 14C, the liquid-impermeable sheet | seat 11, the back side elastic sheet 70, the inner side tape attachment part 13C, and the gather sheet 62 are laminated | stacked in order from the bottom. be able to. Thus, when it is set as the laminated structure which pinches | interposes the back side elastic sheet 70 between 13 C of inner side tape attaching parts and 14 C of outer side tapes, it will become much more difficult to remove. In addition, if the side edge of the back elastic sheet 70 and the base ends of the fastening tapes 13 and 14 are separated from each other, the separated portions have low strength, and therefore breakage occurs along the base ends of the fastening tapes 13 and 14. However, if a laminated structure in which the back side elastic sheet 70 is sandwiched between the inner tape attaching part 13C and the outer tape attaching part 14C, the side edge of the back side elastic sheet 70 and the base ends of the fastening tapes 13, 14 are provided. Since they are not separated, breakage along the base ends of the fastening tapes 13 and 14 is effectively prevented.

On the other hand, as shown in FIG. 9 and FIG. 10, in the form not having the back-side stretchable sheet 70 (described later), as shown in FIG. 11A, the exterior sheet 12, the outer tape attaching portion 14C, The permeable sheet 11, the inner tape attaching portion 13C, and the gather sheet 62 can be laminated . The reference embodiment, as shown in FIG. 11 (b), consider also be stacked in order from the bottom outside the tape mounting portion 14C, the outer sheet 12, a liquid impervious sheet 11, the gather sheet 62 and the inner tape mounting portion 13C is Ru. As described above, when the laminated structure in which the liquid-impermeable sheet 11 is sandwiched between the inner tape attaching portion 13C and the outer tape attaching portion 14C, the fastening tapes 13 and 14 are more difficult to come off. Further, if the side edge of the liquid-impermeable sheet 11 and the base ends of the fastening tapes 13 and 14 are separated from each other, the separated portion has low strength, and therefore the breakage along the base ends of the fastening tapes 13 and 14 occurs. Although it becomes easy to generate | occur | produce, if it is set as the laminated structure which pinches | interposes the liquid-impermeable sheet | seat 11 between the inner side tape attachment part 13C and the outer side tape attachment part 14C, the base edge of the liquid-impermeable sheet | seat 11 and the fastening tapes 13 and 14 will be carried out. Since the ends are not separated from each other, breakage along the base ends of the fastening tapes 13 and 14 is effectively prevented.

  The material of the inner tape attachment portion 13C and the inner tape body portion 13B in the inner tape 13 and the material of the outer tape attachment portion 14C and the outer tape body portion 14B in the outer tape 14 are not particularly limited, but are flexible materials, particularly in the width direction. It is preferable that each of the nonwoven fabrics has a tensile strength of 10 to 150 N / 50 mm and a bending resistance of 20 to 150 mm / 20 mm. Thereby, the whole tape can be made flexible, and even in this case, the strength reduction can be suppressed by the double structure of the inner tape 13 and the outer tape 14. Further, the nonwoven fabric having such tensile strength and bending resistance may be appropriately selected from a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper, and a sheet base material composed of these composite materials, and the fineness is 1.0 to 3 respectively. More preferably, it is a spunbonded nonwoven fabric, an SMS nonwoven fabric, a pointbonded nonwoven fabric, or a spunlace nonwoven fabric with a weight of 5 dtex and a basis weight of 20 to 100 g / m2.

  As the locking portion 13A, a hook material of a mechanical 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. The locking portions 13A of the fastening tapes 13 and 14 can be formed of an adhesive material layer.

  When the diaper DP is attached, the locking portion 13A on the inner surface of the inner tape 13 of the fastening tapes 13 and 14 is placed on the outer surface of the ventral side F with the back side flap portion SF overlapped with the outer side of the ventral side flap portion SF. Lock in place. The positions and dimensions of the fastening portions of the fastening tapes 13 and 14 can be arbitrarily determined. In the diaper DP 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 20 mm. It is preferably 50 mm and the center in the width direction of the product.

  If the fastening tapes 13 and 14 are attached so that the inner tape attaching part 13C of the fastening tapes 13 and 14 overlaps the boundary line between the back end flap part EF and the absorbing element, the right and left fastening tapes are attached when the diaper DP is attached. It is preferable because the dorsal end of the absorbent element is firmly pressed against the body by the tension acting between the inner tape attaching portions 13 and 13. Further, if the inner tape attachment portion 13C of the fastening tapes 13 and 14 is too far from the back side end portion (rear end portion) of the diaper DP, the inner tape attachment portions of the left and right fastening tapes 13 and 14 when the diaper DP is mounted. Since the tension acting between 13C does not reach the back end of the diaper DP, a gap is likely to be formed between the back end of the diaper DP and the body surface. Therefore, the length in the front-rear direction of the back end flap portion is preferably the same as or shorter than the length in the front-rear direction of the inner tape attachment portion 13C of the fastening tapes 13,14.

On the other hand, the gather sheet 62 is an air-through nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric having a fineness of 1.2 to 3.5 dtex and a basis weight of 8 to 35 g / m ² , and the exterior sheet 12 has a fineness of 1.2 to 3. 5 dtex, spunbonded nonwoven fabric having a basis weight of 8~35g / m ^2, or when the spunbonded nonwoven fabric layers are laminated nonwoven fabric sandwiching the melt blown nonwoven fabric layer, side flaps SF, but preferred since SF becomes a flexible texture, gather sheet When 62 and the exterior sheet 12 are such a flexible nonwoven fabric, specifically, the gather sheet 62 has a width direction breaking elongation of about 40 to 100%, a width direction tensile strength of 5 to 15 N / 50 mm, and a width direction tear. The strength is 2 to 5 N, the width direction breaking elongation of the exterior sheet 12 is about 40 to 100%, and the width direction tensile strength is 3 to 8 N / 50. When the mm and the width direction tear strength are 2 to 5 N, breakage along the base ends of the fastening tapes 13 and 14 is likely to occur. Therefore, when such a material is used, the laminated structure of the laminated adhesion portion 15 described above is particularly effective.

(Target sheet)
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 hook 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 sheet base material made of a plastic film or nonwoven fabric so that the hook material engagement protrusions are entangled. In the case of an adhesive material layer, a sheet base material 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 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 fastening portion of the fastening tape 13 is a hook material 13A, The target sheet 12T can be omitted, and the hook material 13A can be entangled with the nonwoven fabric of the exterior sheet 12 and locked. In this case, the target sheet 12T may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent main body 10 and does not have the absorbent element 50, and the front extension part is the ventral end flap part FE. The extended portion on the rear side is the back end flap portion BE.
The length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 13 for the reasons described above. If it is too close, a gap is likely to occur between the back end of the diaper and the body surface due to the thickness and stiffness of the absorbent element 50, so that it is preferably 10 mm or more.
The length in the front-rear direction of the ventral end flap part FE and the back end flap part BE is preferably about 5 to 20% of the length L in the front-rear direction of the whole diaper. In particular, a thickness of 20 to 50 mm is appropriate.

(Back elastic sheet)
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 fastening tapes 13 and 14 to improve the fit in the back side of the diaper. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion overlapping the attachment portions of the fastening tapes 13 and 14, but may be separated to the center in the width direction. The back-and-forth stretchable sheet 70 has a front-rear dimension that is approximately the same as the front-rear dimension of the attachment portions of the fastening tapes 13 and 14, but may have a dimensional difference of about ± 20%. Further, when the back elastic sheet 70 is arranged so as to overlap the boundary line between the back end flap BE and the absorbent element 50 as shown, the back end of the absorbent element 50 is firmly pressed against the 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. Preferably, the elastic stretch member 72 such as a perforated sheet, net, or elongated (thread or string) is fixed in a stretched state in the width direction between the sheet bases 71. Used. As the sheet base 71 in this case, the same one 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. 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 of the sheet (width direction of the diaper). In the range of about 5 to 20 mm at the end in the front-rear 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 top sheet 30 and the absorbent element 50. Further, the back-side elastic sheet 70 may be provided on the 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. As shown in FIG.9 and FIG.10, the above-mentioned back side elastic sheet 70 can also be abbreviate | omitted.

  <Example of Manufacturing Method of Absorbent Article> FIG. 13 shows an example of a manufacturing method of the disposable diaper having the structure shown in FIGS. 7 (a) and 8 (c). It shows the application of adhesive. The production line of this production method includes an absorbent element production part 100, a front side production part 110, a back side production part 130, and an assembly / finishing part 140. Hereinafter, each part will be described in order.

  In the absorbent element manufacturing part 100, a strip-shaped packaging sheet 58 is unwound from an unillustrated raw roll and transported along the longitudinal direction, and then the absorbent body 56 is intermittently disposed in the widthwise intermediate portion on the packaging sheet 58 in the flow direction. I will put it on. In the illustrated embodiment, after the roll pulp 56F is crushed by the garnet cylinder 101 and mixed with the superabsorbent polymer particles 56P, the absorbent body 56 obtained by stacking in a predetermined shape by the stacking drum 102 is placed on the packaging sheet 58. It is configured to supply. The absorbent body 56 placed on the packaging sheet 58 is sandwiched between the pair of press rolls 103 and pressed together with the packaging sheet 58, and then protrudes to both sides of the absorbent body 56 in the width direction (CD direction). Is folded on the upper side of the absorbent body 56 by the packaging sheet sailor 104, the absorbent body 56 is wrapped by the packaging sheet 58, and is crimped by the packaging sheet pressure roller 105. The absorbent body 56 wrapped in the packaging sheet 58 is then intermittently cut in the line flow direction at a position between the absorbent bodies 56 by the absorbent element cutter device 106, and the individual absorbent elements 50 (the absorbent body 56 is packed into the packaging sheet). The absorbent element 50 is supplied to the assembly / finishing part 140.

  On the other hand, in the front side production part 110, elements on the front side with respect to the absorbent element 50 are assembled and supplied to the assembly / finishing part 140. More specifically, after the belt-shaped sheet base material is fed out from a raw roll (not shown) and transferred along the longitudinal direction, the slitter 111 divides the sheet material into left and right gather sheets 62, and then the gather sheets 62. The three-dimensional gather elastic elastic member 63 is fed out and pasted in an extended state, and the gather sheet 62 is folded back so as to sandwich the three-dimensional gather elastic elastic member 63 by the three-dimensional gather sailor 112 to form a three-dimensional gather 60. It supplies to the sticking apparatus 115.

  In addition, a belt-like hook base material is continuously pasted along the longitudinal direction at the center in the width direction while feeding the belt-like sheet base material from a raw roll (not shown) and transported along the longitudinal direction. Both ends in the width direction (CD direction) of the material are pressure-bonded by the tape embossing roll 113 to form the inner tape 13 base material 13T, and then divided into two in the CD direction by a wavy cutting line by the inner tape round cutter 114. A continuous band of each inner tape 13 (in a state where the inner tape 13 is continuous in the vertical direction) is formed, and these are supplied to the inner tape attaching device 115.

  In the inner tape 13 affixing device 115, the continuous band of the inner tape 13 is cut into individual inner tapes 13 by the inner tape cutter unit 116, and the back surface of the three-dimensional gather (the exterior sheet 12 side and the side) to which the inner tape 13 is separately supplied. The inner tape 13 is folded onto the base of the three-dimensional gather by the inner tape 13 folding belt 117, and the folded portion is pasted to the three-dimensional gather with a hook material, and then, if necessary, a pin Processing with the embossing roll 118 is performed. Although not shown, in the case of manufacturing the disposable diaper DP having the structure shown in FIGS. 8A and 8B, the surface of the three-dimensional gather to which the inner tape 13 is separately supplied in the inner tape 13 sticking device 115. Affix it to the (skin side) surface.

  Next, the three-dimensional gather to which the inner tape 13 is attached is attached to the laminate of the top sheet 30 and the intermediate sheet 40. More specifically, while the strip-shaped intermediate sheet 40 is fed out from a raw roll (not shown) and transported along the longitudinal direction, a plurality of openings are formed by the perforating roll 121, while the strip-shaped top is formed from the raw roll (not shown). The sheet 30 is fed out, and the intermediate sheet 40 after perforation is bonded to the top sheet 30 by the intermediate sheet laminating roll 122 to form a laminate of the top sheet 30 and the intermediate sheet 40, and then the surface of the top sheet 30 of the laminate is formed. The solid gather 60 to which the inner tape 13 is attached is pasted. In the illustrated embodiment, the flat gather elastic elastic member 64 is further fed out and pasted on the back surface of the three-dimensional gather 60 in an expanded state, and then supplied to the assembly / finishing part 140 as a front side element. Yes.

  On the other hand, in the back side manufacturing part 130, elements on the back side of the absorbent element 50 are assembled and supplied to the assembly / finishing part 140. More specifically, the belt-shaped exterior sheet 12 is fed out from a raw roll (not shown) and is transported along the longitudinal direction, and is first supplied to the outer tape 14 affixing device 115. Further, while feeding a belt-like sheet base material from a raw roll (not shown) and transporting it along the longitudinal direction, the outer tape round cutter 154 bisects it in the CD direction with a wavy cutting line, and each of the left and right outer tapes 14 continuous bands (in a state where the outer tape 14 is continuous in the longitudinal direction) are formed, and this is supplied to the outer tape attaching device 155.

  In the outer tape 14 affixing device 155, the continuous band of the outer tape 14 is cut into individual outer tapes 14 by the outer tape cutter unit 156, and the outer tape 14 is separately supplied to the surface of the exterior sheet 12 (the gather sheet 62 side). Then, processing with the pin embossing roll 158 is performed on the portion of the outer tape attachment portion 14C as necessary. Although not shown, when the disposable diaper DP having the structure shown in FIGS. 8A and 8B is manufactured, the outer tape 14 is applied to the outer sheet 14 separately supplied by the outer tape 14 affixing device 155. Affix to the back side (surface opposite to the skin side).

  The exterior sheet 12 to which the outer tape 14 is attached by the outer tape affixing device 155 is followed by first affixing the target sheet 12T and then affixing the liquid-impermeable sheet 11, and then assembling and finishing these as elements on the back side. It is configured to be supplied to the part 140. In particular, in the illustrated form, the target sheet 12T continuous band is cut into individual target sheets 12T by the target sheet cutter unit 131, and the target sheet 12T is attached to the outer surface of the exterior sheet 12 by the target sheet attaching roll 132, The strip-shaped liquid-impermeable sheet 11 is cut into individual liquid-impermeable sheets 11 by a liquid-impermeable sheet cutter unit 133, and the liquid-impermeable sheet 11 is packaged by a liquid-impermeable sheet attaching roll 134. The structure is affixed to the inner surface of the sheet 12.

  Further, separately from the exterior sheet system, the back elastic elastic member 72 is fed out to the sheet base 71 while feeding the belt-like sheet base 71 from a raw roll (not shown) and transporting it along the longitudinal direction. The sheet base material 72 is folded back so as to sandwich the back elastic elastic member 72 by the back elastic sheet sailor 135 to form a back elastic sheet, and the back elastic sheet in the back elastic sheet is attached. A part of the member 72 is finely cut by an elastic elastic member cutter 136 as necessary so that the contraction force does not act, and then intermittently cut in the line flow direction by a back side elastic sheet cutter device 137 and individually , And the absorbent element is rotated 90 degrees by the turner 138 and supplied to the assembly / finishing part 140.

  Then, in the assembly / finishing part 140, the back-side stretchable sheet 70, which is also sequentially supplied, is pasted on the inner surface of the back-side element sequentially supplied from the back-side manufacturing part by the assembly drum 141, and the absorbent element is manufactured thereon. Adhering absorbent elements 50 sequentially supplied from the part. Further, the front side elements (the top sheet, the intermediate sheet, the three-dimensional gather, the inner tape, and the flat gather elastic elastic member semi-finished product) supplied from the upper manufacturing part are pasted thereon, and then the CD around the leg die cutter 142. Both side edges in the direction are intermittently cut along the circumference of the legs in the flow direction, and then both sides in the CD direction are folded to the inner surface side by the side flap sailor 143 and then intermittent in the line flow direction by the product cutter device 144 To form a separate diaper DP. Although not shown, the individualized diaper DP is folded in two so that the front and rear direction center is a crease so that the surfaces meet each other, and then a predetermined number of layers are stacked and packaged in a packaging bag. Although not shown, if necessary, an outer tape 14 folding belt may be provided between the assembly drum 141 and the product cutter device 144 so that the outer tape 14 is folded back onto the inner tape 13. The inner tape folding belt 117 may be omitted, and both the inner tape 13 and the outer tape 14 may be folded back on the base of the three-dimensional gather 60 between the assembly drum 141 and the product cutter device 144.

  On the other hand, FIG. 14 shows an example of a method for manufacturing the disposable diaper having the structure shown in FIG. 11A. The back side stretchable sheet manufacturing part 139 in the manufacturing flow of FIG. The outer tape affixing device 155 is provided in the supply line of the liquid-impermeable sheet 11 instead of the supply line of the exterior sheet 12, and the outer tape 14 is the back surface (surface opposite to the skin side) of the liquid-impermeable sheet 11. It is different in that it is configured to be affixed to. When the disposable diaper having the structure shown in FIG. 11B is manufactured, it can be dealt with by simply omitting the back elastic sheet manufacturing part 139 in the manufacturing flow of FIG.

  <Explanation of Terms> The term “front-rear direction (vertical direction)” means a direction connecting the ventral side (front side) and the back side (rear side), and “width direction” means a direction orthogonal to the front-rear direction (left-right direction). "Vertical direction" means the wearing state of the diaper, that is, the direction perpendicular to the width direction when the diaper is folded in two at the crotch so that the ventral part and the back part of the diaper are overlapped. means. Further, the term “elongation rate” means a value when the natural length is 100%. Furthermore, the term “tensile strength” means the strength at the time of cutting measured according to the JIS method (Method A) of JIS L1096: 2010 “Fabric and knitted fabric test method”. However, the width of the test piece is 50 mm, the grip interval is 150 mm, and the tensile speed is 300 mm / min. Further, “tear strength” means a value measured according to A1 method (single tongue method) of JIS L1096: 2010 “Fabric and knitted fabric test method”. However, the width x length of the test piece is 60 mm x 70 mm, the length of the cut is 30 mm, and the tensile speed is 100 mm / min. Further, the term “flexibility” means the stiffness measured according to JIS-L-1096 (45 degree cantilever method).

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

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 13, 14 ... Fastening tape, 13 ... Inner tape, 13A ... Locking part, 13B ... Inner tape main body part, 13C ... Inner tape attaching part, 14 ... Outer tape, 14B ... Outer tape body part, 14C ... Outer tape attachment part, 14V ... Cover part, 15 ... Laminated adhesive part, 30 ... Top sheet, 40 ... Intermediate sheet, 56 ... Absorber, 58 ... Packing sheet, 60 ... Three-dimensional gather, 62 ... Gather sheet, 63 ... Three-dimensional gather elastic elastic member, 64 ... Planar gather elastic elastic member, 70 ... Back side elastic sheet, 12T ... Target sheet, 100 ... Absorbing element manufacturing part, 101 ... Garnet cylinder, 102 ... Stacking drum , 103 ... Press roll, 104 ... Packaging sheet sailor, 105 ... Packaging sheet pressing roller, 106 ... Absorption required Cutter device, 113 ... Tape embossing roll, 114 ... Inner tape round cutter, 115 ... Inner tape sticking device, 116 ... Inner tape cutter unit, 117 ... Inner tape folding belt, 118 ... Pin embossing roll, 122 ... Intermediate sheet laminating roll , 130 ... Back side production part, 131 ... Target sheet cutter unit, 132 ... Target sheet sticking roll, 133 ... Liquid impervious sheet cutter unit, 134 ... Liquid impervious sheet sticking roll, 135 ... Back side stretchable sheet sailor DESCRIPTION OF SYMBOLS 136 ... Elastic elastic member cutter, 137 ... Back side elastic sheet cutter apparatus, 138 ... Turner, 142 ... Die cutter around leg, 143 ... Side flap part sailor, 144 ... Product cutter apparatus, 154 ... Outer tape round cutter Chromatography, 155 ... outer tape applying apparatus, 156 ... outer tape cutter unit, 158 ... pin embossing roller, DP ... diaper, SF ... side flaps.

Claims (6)

In a tape-type disposable diaper configured to be worn by fastening the fastening tape provided on both sides of the back side to the ventral side outer surface,
The fastening tape has an inner tape and an outer tape located outside the inner tape,
The inner tape includes an inner tape mounting portion fixed to both sides on the back side, an inner tape main body portion protruding from the inner tape mounting portion, and a ventral outer surface provided on the inner surface of the inner tape main body portion. And a locking portion with respect to
The outer tape has an outer tape mounting portion that partially or entirely overlaps with the inner tape mounting portion, and an outer tape main body portion that protrudes from the outer tape mounting portion and partially or entirely overlaps with the inner tape main body portion. And
On both sides of the dorsal side, the sheet other than the fastening tape has three or more layers, and the inner and outer tape attaching portions overlap each other and have a laminated adhesive portion bonded to each other.
In the laminated adhesive portion, between said inner tape mounting portion and an outer tape attaching portion, the fastening tape other sheet is sandwiched least one layer Rutotomoni, outside the inner and the outer tape attaching portion of the inner tape mounting portion Each one or more sheets other than the fastening tape are arranged ,
A tape-type disposable diaper characterized by that.   The inner tape attachment portion and the inner tape body portion in the inner tape, and the outer tape attachment portion and the outer tape body portion in the outer tape have a tensile strength in the width direction of 10 to 150 N / 50 mm and a bending resistance of 20 to 150 mm. The tape-type disposable diaper according to claim 1, which is formed of / 20 mm nonwoven fabric. The inner tape attachment portion and the inner tape main body portion of the inner tape, and the outer tape attachment portion and the outer tape main body portion of the outer tape each have a fineness of 1.0 to 3.5 dtex and a basis weight of 20 to 100 g / m ² . The tape type disposable diaper of Claim 2 which is a nonwoven fabric, an SMS nonwoven fabric, a point bond nonwoven fabric, or a spunlace nonwoven fabric. A liquid-permeable top sheet;
A liquid-impermeable sheet located on the back side;
An absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet and extending from the lower abdomen to the groin along the center in the width direction,
On the both sides in the width direction on the inner surface, each comprising a three-dimensional gather extending along the front-rear direction, and an exterior sheet made of a nonwoven fabric covering the outer surface of the liquid-impermeable sheet,
A sheet other than the fastening tape is a gather sheet constituting the three-dimensional gather, the liquid-impermeable sheet, and the exterior sheet,
In the laminated adhesive part, the liquid-impermeable sheet is sandwiched as a sheet other than the fastening tape between the inner tape attaching part and the outer tape attaching part ,
The gather sheet is arranged as a sheet other than the fastening tape inside the inner tape attaching portion,
The exterior sheet is arranged as a sheet other than the fastening tape on the outside of the outer tape attachment portion ,
The tape type disposable diaper of any one of Claims 1-3. A liquid-permeable top sheet;
A liquid-impermeable sheet located on the back side;
An absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet and extending from the lower abdomen to the groin along the center in the width direction,
Three-dimensional gathers extending along the front-rear direction on both sides in the width direction on the inner surface, and an exterior sheet made of a nonwoven fabric covering the outer surface of the liquid-impermeable sheet,
Provided with a belt-like back side elastic sheet provided in the back side portion and extending along the width direction;
A sheet other than the fastening tape is a gather sheet that constitutes the three-dimensional gather, the back-side stretchable sheet, and the exterior sheet,
In the laminated adhesive part, the back elastic sheet is sandwiched between the inner tape attaching part and the outer tape attaching part as a sheet other than the fastening tape ,
The gather sheet is arranged as a sheet other than the fastening tape inside the inner tape attaching portion,
The exterior sheet is arranged as a sheet other than the fastening tape on the outside of the outer tape attachment portion ,
The tape type disposable diaper of any one of Claims 1-3. The gather sheet is an air-through nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric having a fineness of 1.2 to 3.5 dtex and a basis weight of 8 to 35 g / m ² .
Before outer sheet is a fineness 1.2～3.5Dtex, basis weight 8~35g / m ² spunbond nonwoven or spunbonded nonwoven fabric layers in the layered nonwoven fabric sandwiching the melt blown nonwoven fabric layer,
The tape type disposable diaper of any one of Claims 1-5.

Images