JP2014090723A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper provided with three-dimensional gathers having high air permeability, flexibility and leakage-preventing properties.SOLUTION: A disposable diaper 1 includes an absorptive body 2 having an absorber 23, a surface sheet 21 and an outer layer composite sheet 22. The absorptive body 2 has side sheets 24 fixedly disposed at both side parts of the absorptive body 2 via fixation parts 27. The side sheets 24 are each composed of a piece of sheet, the edges 24I at the inner edge parts thereof are folded back to positions of the fixation parts 27, and elastic members 25 are fixedly disposed in the vicinity of folded-back top parts 24T1. With respect to the side sheets 24, the edges 24I at the outer edge parts are folded back to the positions of the fixation part 27, and elastic members 26 are fixedly disposed with a space S from folded-back top parts 24T2. With respect to the side sheets 24, the space between the folded-back sheets at an area 24Z except for an area 25T where the elastic members 25 are disposed, and an area 26T where the elastic members 26 are disposed, is joined via a cohesive part 28 so as to be integrated.

Description

  The present invention relates to a deployable disposable diaper.

  Conventionally, in order to prevent side leakage of urine and loose stool, absorbent articles such as disposable diapers in which so-called three-dimensional gathers that rise due to the contracting force of an elastic member are provided on both sides of an absorbent main body are known. In general, the three-dimensional gather is formed using a water-repellent nonwoven fabric, and the three-dimensional gather is required to have air permeability, flexibility, and leak-proof property.

As a disposable diaper provided with a so-called three-dimensional gather, for example, in Patent Document 1, a nonwoven fabric is folded, an elastic member in an expanded state is disposed between the folded layers, and a rising barrier cuff (so-called three-dimensional gather) and an elastic leg cuff are formed. Disposable diapers are listed.
In addition, as another technique similar to three-dimensional gathers, the present applicant has previously proposed an absorbent article including a pair of side leakage preventing portions formed by folding back a side leakage preventing portion forming sheet (Patent Literature). 2).

JP-A-8-66424 JP 2008-55107 A

  However, Patent Document 1 does not describe anything about fixing an interlayer obtained by folding a nonwoven fabric with a plurality of fused portions by fusion. For example, if the interlayer between folded nonwoven fabrics is fixed using a hot melt adhesive or the like, it is difficult to improve air permeability or flexibility.

  Moreover, the side leak-proof part with which the absorbent article of patent document 2 is provided is formed by folding the side leak-proof part forming sheet and fixing the folded layers with a plurality of fused parts by fusion. However, the side leak-proof portion provided in the absorbent article described in Patent Literature 2 is different from a three-dimensional gather that rises due to the contraction force of the elastic member, without an elastic member being extended. Therefore, Patent Document 2 does not describe any positional relationship between the elastic member disposed between the folded layers and the plurality of fusion portions that fix the folded layers.

  Therefore, the subject of this invention is providing the disposable diaper which provided the solid gathers with high air permeability, a softness | flexibility, and leak-proof property.

  The present invention has a liquid-retaining absorbent body, a surface sheet disposed on the skin contact surface side of the absorbent body, and an outer layer composite sheet disposed on the non-skin contact surface side of the absorbent body. A vertically long absorptive main body divided into an abdominal part located on the wearer's ventral side, a dorsal part located on the dorsal side, and a crotch portion arranged between the abdominal side part and the dorsal side part A disposable diaper, wherein the absorbent main body is folded back along the longitudinal direction on both sides in the longitudinal direction of one longitudinal hydrophobic sheet on each side in the longitudinal direction of the absorbent main body. A side sheet formed by fixing the sheet to the skin contact surface of the top sheet through a fixing portion along the longitudinal direction of the absorbent main body, and on the inner side in the width direction of the side sheet, the hydrophobic The edge of the inner end portion along the longitudinal direction of the adhesive sheet extends to the position of the fixing portion or beyond the fixing portion. A crest that is folded back along the longitudinal direction on the contact surface side or the non-skin contact surface side, and a plurality of three-dimensional solid bodies are extended in the longitudinal direction near the crest at the crotch portion. An elastic member for gathering is disposed and fixed between the hydrophobic sheets, and on the outer side in the width direction of the side sheet, the edge of the outer end along the longitudinal direction of the hydrophobic sheet is The same as the side where the edge of the inner end of the skin contact surface side and the non-skin contact surface side is folded up to the position of the fixing portion or the width direction outward side thereof along the longitudinal direction. A plurality of elastic members for forming leg gathers between the hydrophobic sheets in a stretched state in the longitudinal direction with a space from the folded top at the crotch portion. Arranged and fixed, and the side seat includes the plurality of side seats. Between the hydrophobic sheets that are folded and overlapped in a region excluding the region where the elastic members for forming three-dimensional gathers and the region where the elastic members for forming the plurality of leg gathers are arranged are intermittently provided. Bonded and fixed by a plurality of fused portions arranged, and the hydrophobic sheets between adjacent fused portions are in a non-bonded state, and when worn, the crotch part is used for forming the three-dimensional gathers. Due to the contraction force of the elastic member, the inner side in the width direction from the fixed portion of the side sheet becomes a three-dimensional gather, and the contraction force of the elastic member for forming the leg gathers causes the three-dimensional gather to A disposable diaper in which the outer side in the width direction is a leg gather is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the disposable diaper which provided the solid gathers with high air permeability, a softness | flexibility, and leak-proof property is provided.

FIG. 1 is a developed plan view of a disposable diaper according to this embodiment of the present invention as viewed from the top sheet side. FIG. 2 is a perspective view showing a wearing state of the disposable diaper shown in FIG. 1. FIG. 3 is an enlarged plan view showing a side panel of the disposable diaper shown in FIG. 1 and the vicinity thereof. 4 is a cross-sectional view taken along the line II of FIG. FIG. 5 is a cross-sectional view taken along the line II-II showing a wearing state of the crotch part of the disposable diaper shown in FIG. 1. FIG. 6 is a perspective view illustrating an example of a method for manufacturing a side panel in the disposable diaper of the present embodiment.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
As shown in FIG. 1, the disposable diaper 1 of the present embodiment of the present invention (hereinafter also referred to as diaper 1) is a liquid-retaining absorbent 23 and a surface disposed on the skin contact surface side of the absorbent 23. The absorbent main body 2 having an outer layer composite sheet 22 disposed on the non-skin contact surface side of the sheet 21 and the absorbent body 23 is provided. Moreover, as shown in FIG. 1, the absorptive main body 2 has a vertically long shape, and when worn, the abdominal part A located on the abdomen side of the wearer and the dorsal side part located on the dorsal side of the wearer. B and crotch part C located in the crotch part.
As shown in FIG. 1, the diaper 1 is a so-called unfolded disposable diaper in which a stretchable side panel 3, 3 is provided on each side portion along the longitudinal direction of the absorbent main body 2 in the back side portion B. It is. This will be specifically described below.

As shown in FIG. 1, the absorbent main body 2 of the diaper 1 has a rectangular shape in a state of being expanded in a planar shape. The side panels 3 and 3 are attached to both side portions of the absorbent main body 2 in the back side portion B so as to protrude outward from both side edge portions of the absorbent main body 2. In the disposable diaper 1, the side panels 3 and 3 are fixed to the absorbent main body 2 and a side sheet 24 described later via an adhesive layer.
The longitudinal direction of the disposable diaper 1 is the Y direction in the figure, and is the same direction as the longitudinal direction of the absorbent main body. The width direction of the disposable diaper 1 is the X direction in the figure, and is the same direction as the width direction of the absorbent main body 2. In the following description, the longitudinal direction of the diaper or the direction corresponding to the longitudinal direction of the diaper component is simply the Y direction, the width direction of the diaper or the direction corresponding to the diaper width direction of the diaper component is simply X. Also called direction. Moreover, the skin contact surface in the diaper or the diaper component is a surface directed toward the wearer's skin when worn, and the non-skin contact surface in the diaper or the diaper component is worn by the wearer. It is the surface facing away from the skin.

  As shown in FIGS. 4 and 5, the absorbent main body 2 includes a liquid-permeable top sheet 21, an outer composite sheet 22, and a liquid-retaining absorbent 23 interposed between the two sheets 21 and 22. have. As shown in FIG. 4, the top sheet 21 has the same planar view shape as the outer layer composite sheet 22 except that the width in the X direction is small. The outer layer composite sheet 22 includes a liquid permeation preventive sheet 22a (including water repellency) and an outer layer adhesive layer 61 on the non-skin contact surface side (Q side in FIG. 4) of the leak preventive sheet 22a. And outer layer nonwoven fabric 22b joined together. The outer layer non-woven fabric 22b has the same shape in plan view as the absorbent main body 2 in a state of being spread in a flat shape, and the leak-proof sheet 22a is similar to the outer layer non-woven fabric 22b except that the width in the X direction is slightly smaller as shown in FIG. It has the same planar view shape. Due to the presence of the outer layer nonwoven fabric 22b, the touch of the outer surface of the diaper is improved.

  As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to the longitudinal center line CL of the absorbent main body 2. Therefore, the configuration of the side panels 3 and 3, the laminated state of the side sheets 24 and the joining mode between them and the absorbent main body 2 will be described mainly using the left side of FIG. 1 as an example, but the right side is also symmetrical. Other than that, the same applies.

  As shown in FIG. 3, the side panel 3 is provided with a fastening tape 4 at the distal end portion 3 a, and in the diaper 1, the side panels 3 are fixed between the two sheets 31 and 32 and the two sheets 31 and 32. The elastic member 33 is provided. As shown in FIG. 3, the side panel 3 in the diaper 1 has a rectangular shape in a state of being expanded in a planar shape. Moreover, as shown in FIG. 4, the side panel 3 is fixed between the two sheets 31 and 32 made of nonwoven fabric and the two sheets 31 and 32 in a state of extending in the diaper width direction (X direction). And a plurality of elastic members 33. The fastening tape 4 provided at the front end portion 3a of the side panel 3 is for fixing the side panel 3 to other parts. Each of the elastic members 33 is disposed along the width direction (X direction) of the diaper 1. In addition, the plurality of elastic members 33 in each side panel 3 are arranged at substantially equal intervals in the longitudinal direction (Y direction) of the diaper.

  As shown in FIG. 1, the absorbent main body 2 has side sheets 24 and 24 arranged and fixed via fixing portions 27 on both sides in the longitudinal direction of the absorbent main body 2. 4 and 5, in the diaper 1, the side sheet 24 is on the skin contact surface of the side portion of the top sheet 21 of the absorbent main body 2, that is, the longitudinal direction (Y direction) of the absorbent body 23. On the skin contact surface (P side in FIG. 4) of the surface sheet 21 extending outward in the width direction from both side edges along the line, an adhesive is applied by various known methods, or by various known methods It arrange | positions over the full length of the absorptive main body 2 via the fixing | fixed part 27 formed by mutually melt-bonding. The fixing portion 27 is disposed over the entire length of the side seat 24 and the absorbent main body 2.

As shown in FIGS. 4 and 5, the side sheet 24 is folded back along the longitudinal direction (Y direction) on both sides in the width direction (X direction) of one longitudinally long (long in the Y direction) hydrophobic sheet, The hydrophobic sheet is disposed and fixed to the skin contact surface of the top sheet 21 via a fixing portion 27 along the longitudinal direction (Y direction) of the absorbent main body 2. The side sheet 24 has an inner edge 24I along the longitudinal direction (Y direction) of the hydrophobic sheet on the inner side in the width direction (center line CL side) until the position of the fixing part 27 is reached. On the non-skin contact surface side (Q side in FIG. 4), there is a folded top portion 24T1 that is folded along the longitudinal direction (Y direction). In the vicinity of the folded top portion 24T1 in the crotch portion C, a plurality of elastic members 25 for forming a three-dimensional gather are disposed and fixed between the hydrophobic sheets in a stretched state in the longitudinal direction (Y direction). Here, the plurality of elastic members 25 being arranged in the vicinity of the top 24T1 substantially means that one of the plurality of elastic members 25 for forming a three-dimensional gather is formed at the tip of the folded top 24T1. It means that a plurality of elastic members 25 are intermittently arranged at a predetermined interval from the tip. One or more and four or less elastic members 25 for forming a three-dimensional gather are preferably arranged. In the diaper 1, two elastic members 25 are arranged. As described above, the side sheet 24 of the diaper 1 has the edge 24I of the inner end portion of the hydrophobic sheet folded back to the position of the fixed portion 27, but is folded back beyond the position of the fixed portion 27. It may be.
In addition, regarding the direction in which the sheet is folded, “the non-skin contact surface side of the sheet” is the Q side in the figure (the surface side facing away from the wearer's skin), and “the skin contact surface side of the sheet” Is the P side in the figure (the side facing the wearer's skin).

  As shown in FIGS. 4 and 5, the side sheet 24 has an outer edge 24 </ b> O along the longitudinal direction (Y direction) of the hydrophobic sheet on the outer side in the width direction. The same side as the side where the edge 24I of the inner end of the skin contact surface side and the non-skin contact surface side is folded back along the longitudinal direction (Y direction), specifically the diaper 1 1 has a folded top 24T2 which is folded back to the non-skin contact surface side (Q side in FIG. 4) of the sheet. A plurality of elastic members 26 for forming leg gathers are disposed and fixed between the hydrophobic sheets in a stretched state in the longitudinal direction (Y direction) with a spacing S from the folded top portion 24T2 in the crotch portion C. Here, no elastic member is disposed in the space S, and the space S between the folded top 24T2 and the elastic member 26 for leg gather formation is an elastic member non-existing region. Thus, the space | interval S which is an elastic member non-existing area | region is provided adjacent to the folding | vertical top part 24T2, and the elastic member 25 is intermittently arranged by the space | interval S from the top part 24T2. One or more and four or less elastic members 26 for forming leg gathers are preferably arranged. In the diaper 1, two elastic members 26 are arranged. As described above, the side sheet 24 of the diaper 1 has the edge 24O of the outer end portion of the hydrophobic sheet folded back to the position of the fixing portion 27, but the width direction ( X direction) may be folded back to the outer side. Thus, it is preferable that the folded portion is within a range not exceeding the position of the fixing portion 27 because the edge 24O of the outer end portion does not contact the skin.

  The ratio of the width W2 of the interval S to the length W1 in the width direction (X direction) of the side sheet 24 that is folded back (see FIG. 4) is soft around the groin and reduces the marks on the skin or leaks. From the viewpoint of prevention, 5% or more is preferable, 8% or more is more preferable, 40% or less is preferable, 35% or less is more preferable, specifically 10% or more and 30% or less is preferable, 15% More preferably, it is 25% or less. Specifically, the width W2 of the interval S is preferably 4 mm or more, more preferably 6 mm or more, preferably 35 mm or less, more preferably 30 mm or less, specifically from the same viewpoint as the above-described area ratio. It is preferably 8 mm or more and 25 mm or less, and more preferably 10 mm or more and 20 mm or less.

  In the side sheet 24, it is preferable that the folded inner edge 24I and the folded outer edge 24I are integrated in a butted state. That is, it is preferable that the folded edge 24I of the inner end and the folded edge 24I of the outer end are flush with each other to form the side sheet 24 in an annular shape (endless shape). When the inner and outer edges are abutted without a gap and when there is a gap, the gap is preferably within 3 mm. Thus, since the side sheet 24 is formed in an annular shape (endless shape), the entire sheet has a double structure, so that leakage resistance is improved and the end portions do not overlap with each other. There is an effect that it is difficult to produce a part and it is difficult to inhibit the fit to the body.

  Further, as shown in FIG. 3, the side seat 24 includes a region 25 </ b> T (see FIG. 1) where a plurality of three-dimensional gather forming elastic members 25 are arranged and a plurality of leg gather forming elastic members 26. The folded and overlapped hydrophobic sheets in the region 24Z excluding each of the formed regions 26T (see FIG. 1) are joined and fixed by a plurality of fusion portions 28 arranged intermittently. More specifically, in the diaper 1, the side sheet 24 has a region 25 </ b> T in which the elastic member 25 for forming a three-dimensional gather is disposed in the longitudinal direction (Y direction) of the absorbent main body 2 as illustrated in FIG. 3. The extended region 250T of the three-dimensional gathered elastic member extended to the entire region and the region 26T provided with the elastic member 26 for leg gather formation were extended to the entire longitudinal direction (Y direction) of the absorbent main body 2. And an extension region 260T of the leg gather elastic member. In the side sheet 24 of the diaper 1, the excluded area 24 </ b> Z is an area between the extension area 250 </ b> T of the three-dimensional gather elastic member and the extension area 260 </ b> T of the leg gather elastic member, and the outer side in the width direction of the side seat 24. This is an area between the side folded top 24T2 and the extended area 260T of the leg gather elastic member. Then, as shown in FIG. 3, a plurality of fusion sheets formed by thermal fusion are formed between the hydrophobic sheets folded and overlapped in the region between the extension region 250T of the three-dimensional gather elastic member and the extension region 260T of the leg gather elastic member. Similarly, between the folded and overlapped hydrophobic sheets in the region between the folded top portion 24T2 on the outer side in the width direction of the side sheet 24 and the extending region 260T of the leg gather elastic member. Are joined by a plurality of fused portions 28 by heat fusion. In this way, the side sheet 24 is joined and integrated by the plurality of fused portions 28. Note that the hydrophobic sheets between the adjacent fused portions 28 are not fixed and are not joined. By making it a non-joined state, the texture and flexibility of the side sheet are not impaired.

In the side sheet 24 of the diaper 1, the fusion | melting part 28 is distribute | arranged in the shape of a dot as shown in FIG. The shape of the fusion | melting part 28 is not restrict | limited in particular, For example, arbitrary shapes, such as circular, an ellipse, a rhombus, a triangle, a polygon, may be sufficient. The sealing pattern area of one fused part 28 is preferably 0.1 mm ² or more, more preferably 0.2 mm ² or more, and 3 mm from the viewpoint of not impairing the wearing feeling. ² or less, preferably 2 mm ² or less, more preferably 0.3 mm ² or more and 1 mm ² or less, and 0.4 mm ² or more and 0.8 mm ² or less. Is more preferable. The distance between adjacent adjacent fused portions 28 is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 10 mm or less, from the viewpoint of not impairing the wearing feeling. More preferably, it is 8 mm or less, More specifically, it is 2 mm or more and 6 mm or less, More preferably, it is 2 mm or more and 4 mm or less. By making the interval longer, the texture and flexibility of the side seat are not impaired. Here, the interval is the shortest distance between the facing edges between the two fused portions. Further, the fused portion 28, the number of arrangement, from the viewpoint to avoid impairing the wearing comfort, it is preferred that one / cm ² or more, more preferably 2 pieces / cm ² or more, 20 pieces / cm ² or less, more preferably 15 pieces / cm ² or less, more specifically 3 pieces / cm ² or more and 10 pieces / cm ² or less, more preferably 4 pieces / cm ² or less. More preferably, the number is from 8 / cm ^{2 to} 8 / cm ² . Furthermore, the ratio of the total seal pattern area of the plurality of fused portions 28 to the total area of the side sheet 24 formed by folding is preferably 0.5% or more from the viewpoint of ensuring the softness of the product. % Or more, more preferably 10% or less, further preferably 8% or less, more specifically 1.5% or more and 6% or less, preferably 2% or less. % To 4% is more preferable.

  The fused portion 28 can be formed using, for example, heat sealing, ultrasonic sealing, high frequency sealing, or a combination of two or more thereof. As described above, the formation pattern of the fusion part 28 of the diaper 1 is a dot pattern arranged in the form of dots, but is not limited thereto. For example, a linear fusion part is provided on the diaper 1. It may be a linear pattern or a lattice pattern formed one or more in the longitudinal direction. Two or more seal patterns may be used in combination.

  In the diaper 1, as shown in FIG. 1, the elastic member 25 for forming a three-dimensional gather arranged in an extended state on the side sheet 24 and the elastic member 26 for forming a leg gather arranged in an extended state on the side sheet 24 are Each length is arranged to be shorter than the length of the absorbent body 23 of the absorbent main body 2. Further, in the diaper 1, as shown in FIG. 1, the length of the elastic member 25 for forming a three-dimensional gather arranged in the extended state on the side sheet 24 is the length of the leg gather formed in the extended state on the side sheet 24. It is arranged longer than the length of the elastic member 26 for use. The ratio of the length in the longitudinal direction (Y direction) of the elastic member 25 for forming a three-dimensional gather to the length in the longitudinal direction (Y direction) of the absorbent body 23 is preferably 60% or more, and 65%. More preferably, it is preferably 95% or less, more preferably 90% or less, more specifically 70% or more and 90% or less, and 75% or more and 85%. % Or less is more preferable. The ratio of the length in the longitudinal direction (Y direction) of the elastic member 26 for forming the stretched leg gathers to the length in the longitudinal direction (Y direction) of the absorber 23 is preferably 40% or more, and more than 50%. More preferably, it is 90% or less, more preferably 80% or less, more specifically 55% or more and 75% or less, and more preferably 60% or more and 70%. The following is more preferable. The length of the elastic member 25 for forming the three-dimensional gather in the extended state is preferably 1.1 times longer than the length of the elastic member 26 for forming the leg gather in the extended state, and 1.2 times longer. Further preferred.

  The leg gather forming elastic member 26 arranged in the stretched state on the side sheet 24 has a larger stretch rate than the stretch rate of the elastic member 25 for forming the three-dimensional gather arranged in the stretched state on the side sheet 24. Specifically, the elastic members 26 for forming leg gathers and the elastic members 25 for forming three-dimensional gathers are made of the same material and have the same thickness but different elongation rates. As materials of the elastic member 26 for forming leg gathers and the elastic member 25 for forming three-dimensional gathers, any material can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. In the diaper 1, the elastic member 26 for forming leg gathers having a stress of 30 gf (preferably a stress in the range of 15 gf to 60 gf) when stretched to a stretch rate of 100% has a stretch rate of 75% to 250%. It is preferably arranged and fixed in a stretched state in a range of 100%, more preferably in a state of being stretched and fixed in a range of 100% to 200%. Similarly to the elastic member 26 for forming leg gathers, the elastic member 25 for forming three-dimensional gathers having a stress of 30 gf (preferably a stress in the range of 15 gf to 60 gf) when expanded to 100% elongation is provided. In addition, it is preferably arranged and fixed in a stretched state in a range of 50% to 200%, and further arranged and fixed in a stretched state in a range of 75% to 150%. preferable. The elongation rate is the ratio of the length of the stretched portion to the natural length. For example, when a 10 cm length is stretched to 20 cm, the stretch rate is 100%.

  As shown in FIG. 5, the side seat 24 formed as described above is wider than the fixing portion 27 of the side seat 24 due to the contraction force of the elastic member 25 for forming a three-dimensional gather in the crotch portion C as shown in FIG. 5. The direction inner side becomes a three-dimensional gather. Specifically, in the crotch portion C, the folded top portion 24T1 on the inner side in the width direction with respect to the fixing portion 27 of the side seat 24 is separated from the topsheet 21 to form a three-dimensional gather. At the same time, the outer side in the width direction of the fixing portion 27 of the side seat 24 becomes the leg gather due to the contraction force of the elastic member 26 for forming the leg gather.

  As described above, the diaper 1 is provided with the stretchable side panels 3 and 3 on both sides of the absorbent main body 2 in the back side B as shown in FIG. Moreover, as above-mentioned, in the diaper 1, the side seat | sheet 24 is the skin contact surface (P side in FIG. 4) of the side part of the surface sheet 21 of the absorptive main body 2, as shown in FIG.4 and FIG.5. It is arranged over the entire length of the absorbent main body 2 via a fixing part 27 disposed over the entire length of the absorbent main body 2. In the diaper 1, in the region where the side panel 3 is disposed on the back side B, as shown in FIG. 4, the side sheet 24 is placed on the sheet 31 constituting the side panel 3 via the surface side adhesive layer 66. A plurality of strips that are fixed to the topsheet 21 via a fixing portion 27 and that extend continuously from the side edges of the topsheet to the width direction (X direction) outward in the longitudinal direction. It is fixed and formed through an adhesive (connecting adhesive layer 62). The front surface side adhesive layer 66 is formed only on a portion where the side panel 3 is disposed.

  In the diaper 1, the side sheet 24 is fixed to the top sheet 21, as shown in the figure, in the crotch C and the ventral side A excluding the area where the side panel 3 is arranged on the back side B. A plurality of adhesives (a connecting adhesive layer 62 for connection) that are fixed via the part 27 and that have a region on the outer side in the width direction from the fixing part 27 of the side sheet 24 are continuous with the outer layer composite sheet 22 in the longitudinal direction. It is fixed and formed through. The fixing portion 27 and the plurality of connecting adhesive layers 62 are formed over substantially the entire length of the absorbent main body 2. The connecting adhesive layer 62 extending in the longitudinal direction (Y direction) is leak-proof of the outer layer composite sheet 22 at an interval in the width direction (X direction) and outside the fixing portion 27 in the width direction (X direction). It is preferable that 2 or more and 10 or less are arranged in the region extending to the outer layer nonwoven fabric 22b on the outer side in the width direction (X direction) than the sheet 22a and the leak-proof sheet 22a, and in the diaper 1, three are arranged. .

  Moreover, as for the diaper 1, in the both ends of the longitudinal direction of the absorptive main body 2, ie, a part of the back side part B, and a part of the abdominal side part A, as shown in FIG. 21 is fixed via an adhesive layer 67. As shown in FIG. 4, the adhesive layer 67 is provided on the inner side (longitudinal center line CL side) in the width direction (X direction) than the fixing portion 27, and the abdominal side A and the back side B Is not provided in the crotch part C.

  As shown in FIG. 4, the side panel 3 in the diaper 1 includes a main body side adhesive layer 35, a front end side adhesive layer 36, and a plurality of intermediate adhesive layers 37. These adhesive layers 35, 36, and 37 are all formed so as to extend in the diaper longitudinal direction (Y direction). In these adhesive layers 35, 36, and 37, a plurality of elastic members 33 are fixed in an extended state between the two sheets 31 and 32 via an adhesive that constitutes each adhesive layer. In addition, at the portion where the elastic member 33 is not interposed, the two sheets 31 and 32 are directly joined to each other via an adhesive constituting each adhesive layer.

  As shown in FIG. 4, the main body side adhesive layer 35 is provided on the absorbent main body 2 side in the extending direction of the side panel 3, and ends of the individual elastic members 33 on the absorbent main body 2 side or The neighborhood is fixed. The front-end-side adhesive layer 36 is provided on the front-end portion 3a side in the extending direction of the side panel 3, and fixes the end portion of each elastic member 33 on the front-end portion 3a side of the side panel 3 or the vicinity thereof. ing. A plurality of intermediate adhesive layers 37 are provided in the intermediate region 30 which is a region between the main body side adhesive layer 35 and the front end side adhesive layer 36 in the extending direction of the side panel 3. The intermediate adhesive layer 37 is smaller in width than both of the adhesive layers 35 and 36, and a plurality of intermediate adhesive layers 37 are intermittently formed in the intermediate region 30. In the extending direction of the side panel 3, between the main body side adhesive layer 35 and the adjacent intermediate adhesive layer 37, between the adjacent intermediate adhesive layers 37, and between the front end side adhesive layer 36 and it. Between the intermediate adhesive layers 37, non-adhesive regions 38 where no adhesive is disposed are formed. In the diaper 1 of this embodiment, the extending direction of the side panel 3 coincides with the diaper width direction.

As shown in FIG. 3, each of the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 includes a plurality of (more preferably three or more) elastic members 33 extending in the X direction. It crosses and extends in the longitudinal direction (Y direction) of the diaper. The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 all extend in the longitudinal direction of the diaper (Y direction) across all the elastic members 33 extending in the X direction. It is more preferable that it extends over the entire length between the upper and lower edges 3u, 3d of the side panel 3.
Similarly, the non-bonding region 38 extends in the longitudinal direction of the diaper (Y direction) intersecting with a plurality of (more preferably 3 or more) elastic members 33 extending in the X direction. The non-bonding region 38 also preferably extends in the longitudinal direction of the diaper (Y direction) across all the elastic members 33 extending in the X direction, and extends over the entire length between the upper and lower edges 3u, 3d of the side panel 3. More preferably.

As shown in FIG. 4, the side panel 3 in the diaper 1 has a reinforcing adhesive in which an end 3 b (hereinafter also referred to as a base end 3 b) on the absorbent main body 2 side partially overlaps the main body-side adhesive layer 35. It is reinforced with an agent layer 63. More specifically, as shown in FIG. 4, of the two sheets 31 and 32 constituting the side panel 3, the side panel 3 is positioned on the non-skin contact surface side (Q side in FIG. 4). The sheet 32 to be folded is folded back to the non-skin contact surface side (Q side in FIG. 4) of the sheet 32 at the base end portion 3b of the side panel 3, and the folded portion is the reinforcing adhesive layer 63. It is joined to the non-skin contact surface of the sheet 32 via
Since the base end portion 3b of the side panel 3 is reinforced by such a configuration, the base panel 3b has a moderately high rigidity and has a sufficient strength that is not easily damaged by a tensile force in the X direction.

  The side panel 3 formed in this manner is sandwiched between the portion located in the gap S in the folded top portion 24T2 on the outer side in the width direction (X direction) of the side sheet 24 and the outer layer nonwoven fabric 22b of the outer layer composite sheet 22. Is fixed. Specifically, the reinforced base end portion 3 b of the side panel 3 is sandwiched between the portion located at the interval S of the side sheet 24 and the outer layer nonwoven fabric 22 b of the outer layer composite sheet 22, and the surface side adhesive layer 66. And fixed to the outer composite sheet 22 by a plurality of connecting adhesive layers 62.

  In the diaper 1, as shown in FIG. 4, the other of the two sheets 31 and 32 constituting the side panel 3, the skin contact surface side of the side panel 3 (P side in FIG. 4). The end portion 3b of the sheet 31 positioned at (3) is not folded back on the non-skin contact surface side or the skin contact surface side of the sheet 31, but is folded back and reinforced like the sheet 32. It may be.

As shown in FIG. 4, in the width direction (X direction) of the diaper 1, the main body side adhesive layer 35 is formed to be spaced outward from the outer layer adhesive layer 61. That is, the main body side adhesive layer 35 is formed outward (left side in FIG. 4) from the end 61a of the outer layer adhesive layer 61 on the outer side in the diaper width direction. The agent layer 61 is formed so as to be spaced apart in the X direction without having overlapping portions.
On the other hand, in the diaper width direction (X direction), the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are spaced apart from each other in the diaper width direction. It is preferable that they are overlapped so that the existing portion) does not occur.

  The main body-side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are formed on the entire length of the fastening tape 4 in the Y direction in the above-described mode (in particular, the mode shown in FIG. 4). It is preferable to extend over the entire length, and in the same manner, it is more preferable to extend over the entire length of the side panel 3 in the Y direction.

As shown in FIG. 4, the side panel 3 of the diaper 1 is also reinforced by using a second reinforcing adhesive layer 64 that partially overlaps the front end side adhesive layer 36. More specifically, as shown in FIG. 4, of the two sheets 31 and 32 constituting the side panel 3, the side panel 3 is positioned on the non-skin contact surface side (Q side in FIG. 4). The sheet 32 to be folded is folded back to the non-skin contact surface side (Q side in FIG. 4) of the sheet 32 at the tip 3a of the side panel 3, and the folded portion is the second reinforcing adhesive layer. It is joined to the non-skin contact surface of the sheet 32 via 64.
Since the front end portion 3a of the side panel 3 is reinforced by such a configuration, it has a reasonably high rigidity and a sufficient strength that is not easily damaged by the tensile force in the X direction.

As shown in FIG. 4, in the side panel 3, the tip portion 3 a reinforced in this way is joined to the fastening tape 4 by the second connecting adhesive layer 65.
The fastening tape 4 includes a tape base material 42 and a male member of a mechanical hook-and-loop fastener that is bonded to the tape base material 42 to form a fastening portion 41. And the part which consists only of the tape base material 42 in the fastening tape 4 overlaps with the front-end | tip part 3a of the side panel 3, and is joined. In the present embodiment, the distal end portion 3 a of the side panel 3 and the tape base material 42 are joined via the second connecting adhesive layer 65. As a method of fixing the male member of the mechanical hook-and-loop fastener to the tape base material 42, any joining method such as heat fusion or adhesion with an adhesive is used.
As shown in FIG. 1, a landing zone 5 for fastening a fastening tape 4, more specifically, a fastening part 41 of the fastening tape 4, is provided on the non-skin contact surface of the ventral side A of the diaper 1. Is provided.

  In the diaper 1, as shown in FIG. 4, the other of the two sheets 31 and 32 constituting the side panel 3, the skin contact surface side of the side panel 3 (P side in FIG. 4). The sheet 31 positioned at () is not folded back on the non-skin contact surface side or the skin contact surface side of the sheet 31, but is folded back and reinforced like the sheet 32. It may be.

As shown in FIG. 4, in the width direction (X direction) of the diaper 1, the tip-side adhesive layer 36 is formed so as to be spaced inward from the second connection adhesive layer 65. That is, the tip side adhesive layer 36 is formed inward (right side in FIG. 4) from the end 65b of the second connection adhesive layer 65 on the inner side in the diaper width direction. And the second connection adhesive layer 65 are formed so as to be separated from each other in the X direction without having a portion overlapping each other.
On the other hand, in the diaper width direction (X direction), the tip side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connection adhesive layer 65 are spaced apart in the diaper width direction (the absence of the adhesive layer). ) So that they do not occur.

  It is preferable that the front end side adhesive layer 36 and the second reinforcing adhesive layer 64 extend over the entire length in the Y direction of the fastening tape 4 in the above-described aspect (particularly the aspect shown in FIG. 4). In the same manner, it is more preferable that the side panel 3 extends over the entire length in the Y direction. The second connecting adhesive layer 65 preferably extends in the above-described manner (particularly the embodiment shown in FIG. 4) over a length of 50% or more of the entire length of the fastening tape 4 in the Y direction. In the same manner, it is more preferable that the fastening tape 4 extends over the entire length in the Y direction.

  When the disposable diaper 1 according to this embodiment is worn on the wearer, as shown in FIG. 2, the fastening tape 4 is fastened by pulling the fastening tape 4 by hand and extending the side panel 3. The part 41 is pressed against the landing zone 5 and fixed.

Next, the effect at the time of using the diaper 1 of embodiment of this invention mentioned above is demonstrated.
4 and 5, when the diaper 1 is worn, the side sheet 24, which is a three-dimensional gather and a leg gather in the crotch part C, is composed of a single sheet and has an inner edge. 24I is folded back to the non-skin contact surface side (Q side in FIG. 4) of the sheet to the position of the fixing part 27, and the edge 24I of the outer end thereof is non-skin-contacting of the sheet to the position of the fixing part 27 It is folded back to the surface side (Q side in FIG. 4) to form two layers. Therefore, the leak-proof property of a three-dimensional gather and a leg gather improves. Then, the folded sheets of the region 24Z excluding the region 25T where the elastic member 25 for forming the three-dimensional gathering and the region 26T where the elastic member 26 for forming the leg gathers are arranged are intermittently arranged. Since it is joined by a plurality of fusion parts 28, it is easy to form an air layer between the sheets between the adjacent fusion parts 28, so that the air permeability and flexibility of the three-dimensional gather and leg gather are improved, It is difficult for body fluids to pass through, and the leakproofness of the three-dimensional gather and the leg gather is further improved. In addition, since the elastic member 26 for forming leg gathers is disposed and fixed at an interval S (elastic member non-existing region) from the folded top 24T2, the outer portion in the width direction (X direction) than the elastic member 26 The flexibility is further improved. In particular, in the diaper 1, since the plurality of fused portions 28 are arranged in the form of dots, the air permeability, flexibility, and leakproofness are further improved.

  Further, as shown in FIG. 3, the diaper 1 has a three-dimensional gather elastic member extension region 250 </ b> T in which a region 25 </ b> T in which the three-dimensional gather forming elastic member 25 is disposed extends in the entire longitudinal direction (Y direction). And a leg gather elastic member extending region 260T in which the region 26T in which the elastic member 26 for forming leg gathers is arranged extends in the entire length direction (Y direction), and a three-dimensional gather elastic member The fusion part 28 is not arranged in the extension region 250T of the leg gathering elastic member and the extension region 260T of the leg gather elastic member. Therefore, the air permeability and flexibility of the three-dimensional gather and the leg gather are further improved.

  In addition, the side sheet 24 of the diaper 1 is configured such that the stretch rate of the leg gathering elastic member 26 arranged in the stretched state is larger than the stretch rate of the solid gathering elastic member 25 placed in the stretched state. ing. Therefore, the diaper 1 is easily fixed around the wearer's leg by leg gathers, and accordingly, the three-dimensional gathers easily follow the wearer's ridges. As a result, the side part of the absorptive main body 2 can be easily fitted to the body, and leakproofness can be improved.

  In the diaper 1, as shown in FIG. 1, the length of the elastic member 25 for forming the three-dimensional gather in the extended state is longer than the length of the elastic member 26 for forming the leg gather in the extended state. Therefore, the side seat | sheet 24 can be used effectively, it becomes easy to match the shape of the absorber 23 and the shape of a solid gather and a leg gather with a body, and can improve leak-proof property.

  As shown in FIGS. 4 and 5, the side sheet 24 of the diaper 1 has a plurality of adhesives (adhesives for connection) on the outer layer composite sheet 22 with the outer portion in the width direction (X direction) from the fixing portion 27. It is fixed via the agent layer 62). Therefore, the breathability and flexibility of the leg gather are improved.

  Further, as shown in FIG. 4, the side panel 3 of the diaper 1 is sandwiched and fixed between a portion located in the space S (the elastic member non-existing region) of the side sheet 24 and the outer layer nonwoven fabric 22 b of the outer layer composite sheet 22. ing. In the space S between the side sheets 24 (the elastic member non-existing region), an air layer is easily formed between the sheets between the adjacent fused portions 28, so that leakage prevention at the fixed portion of the side panel 3 is improved. Can do.

Like the side panel 3 in the diaper 1, for example, the base end portion 3 b of the side panel 3 is reinforced by the folding and reinforcing adhesive layer 63 of the sheet 32, while the main body side adhesive layer 35 and the outer layer adhesive are used. When the layer 61 is separated in the X direction, the base end portion 3b of the side panel 3 is compared to the case where all the layers from the sheet 31 to the outer nonwoven fabric 22b are joined at the same position in the X direction. In addition, it is possible to prevent an excessively hard portion from being generated in the vicinity thereof.
The significance that the adhesive layers separated in the X direction are the main body side adhesive layer 35 and the outer layer adhesive layer 61 is to improve the adhesive strength between the side panel 3 and the outer layer composite sheet 22 and to improve the appearance when bonded. is there. The location of the main body side adhesive layer 35 on the side panel 3 tends to become wrinkles due to the contraction of the elastic member 33. When the main body side adhesive layer 35 and the outer layer adhesive layer 61 are not separated from each other in the X direction, the outer layer composite sheet 22 and the side of the side panel 3 having the ridges are joined, and the contact area is reduced and joined. Strength will fall. Moreover, the wrinkles of the side panel 3 also appear on the outer surface of the outer composite sheet due to the bonding. However, in the diaper 1, since the adhesive layers separated in the X direction are the main body side adhesive layer 35 and the outer layer adhesive layer 61, such a problem can be avoided.
In addition, by using a breathable sheet such as a nonwoven fabric for the sheets 31 and 32 and the like, it becomes easy to ensure good breathability in the vicinity of the joint portion between the side panel 3 and the absorbent main body 2.

  Further, like the diaper 1, for example, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are overlapped so that there is no gap between them, When the adhesive layer is substantially continuous in the X direction, the side panel 3 is pulled to a portion of the side panel 3 and the absorbent main body 2 extending from the main body side adhesive layer 35 to the outer adhesive layer 61. It is possible to secure a sufficient strength that is difficult to break.

Moreover, like the side panel 3 of the diaper 1, for example, the front end portion 3a of the side panel 3 is also reinforced by folding the sheet 32 and the second reinforcing adhesive layer 64, and the reinforced front end portion 3a is Since it is joined to the fastening tape 4 by the second connecting adhesive layer 65, the strength of the fastening portion of the fastening tape 4 in the side panel 3 can be enhanced.
Further, as in the diaper 1, for example, if the tip side adhesive layer 36 and the second connection adhesive layer 65 are separated in the X direction, the total from the sheet 31 to the tape base material 42 of the fastening tape 4 is achieved. Compared to the case where all the layers are joined at the same position in the X direction, it is possible to prevent an excessively hard portion from being generated at the connection portion between the fastening tape 4 and the side panel 3 or in the vicinity thereof. . Further, by using a breathable sheet such as a non-woven fabric for the sheets 31, 32, etc., it becomes easy to ensure good breathability in the vicinity of the side panel 3 and the tip portion 3a.

Further, like the diaper 1, for example, the tip side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connecting adhesive layer 65 are overlapped so that there is no gap between them, and the adhesive When the layers are substantially continuous in the X direction, even if the fastening tape 4 is pulled in the portion extending from the second connecting adhesive layer 65 to the distal-side adhesive layer 36 in the fastening tape 4 and the side panel 3. Sufficient strength that is difficult to break can be secured.
Since the diaper 1 of the present embodiment has the above-described configuration, even if a strong tensile force is applied to the fastening tape 4 or the side panel 3, damage such as tearing or tearing in the entire region from the fastening tape 4 to the absorbent main body 2. Is unlikely to occur.

  In the intermediate region 30 of the disposable diaper 1, an intermediate adhesive layer 37 is formed by providing a non-adhesive region 38 between adjacent adhesive layers. In the natural state of the diaper 1, an elastic member Due to the contraction of 33, the two sheets 31, 32 in the non-adhesive region 38 swell in the direction away from the elastic member 33, respectively, and a plurality of sheets that extend across the plurality of elastic members 33 on both sides of the side panel 3.襞 (not shown) is formed. And the bag does not disappear completely even when the diaper is worn. Therefore, the part hardened by the adhesive layers 36 to 37 in the side panel 3, particularly the part hardened by the intermediate adhesive layer 37, does not easily hit the wearer's skin and does not give a sense of discomfort.

  The surface side adhesive layer 66, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, the outer layer adhesive layer 61, the tip side adhesive layer 36, and the second reinforcing adhesive described above. The layer 64, the second connecting adhesive layer 65, and the intermediate adhesive layer 37 are formed by applying an adhesive to any one or both of the two sheets sandwiching the layer 64 by various known methods, and then printing the two sheets. These sheets can be formed by overlapping and pressing.

  The adhesive coating pattern for forming each adhesive layer is preferably a so-called solid coating using a spray gun, coater gun or the like as an adhesive coating machine, but a bead gun as an adhesive coating machine. Using a spiral spray gun, an omega-shaped spray gun, a transfer roll, or the like, pattern coating such as a linear shape, a spiral shape, an omega shape, or a dot shape can also be performed.

The constituent material of the diaper 1 is demonstrated.
As the sheets 31 and 32 constituting the side panel 3 and the tape base material 42 of the fastening tape 4, various sheet materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins are used without particular limitation. be able to.
For example, as the sheets 31 and 32 and the tape base material 42, a nonwoven fabric, a woven fabric, a film, or a laminated sheet thereof can be used.
As the surface sheet 21, the outer layer composite sheet 22, and the absorbent body 23 constituting the absorbent main body 2, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. it can. For example, as the surface sheet 21, a hydrophilic and liquid-permeable nonwoven fabric, a three-dimensional aperture film, or the like can be used. As the outer layer composite sheet 22, the leak-proof sheet 22a is a liquid-impermeable or liquid-impervious (including water repellency) resin film, and the outer layer nonwoven fabric 22b is a nonwoven fabric produced by various manufacturing methods (for example, an air-through nonwoven fabric or a spunbond nonwoven fabric). , Spunlace nonwoven fabric, needle punched nonwoven fabric, etc.). The outer layer nonwoven fabric 22b may have a multilayer structure. Moreover, as the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held by the absorbent core 23 is made of water-permeable thin paper or non-woven fabric. Those coated with a core wrap sheet can be used. As the side sheet 24 constituting the three-dimensional gather and the leg gather, a film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

The elastic member 33, the elastic member 25 for forming three-dimensional gathers, and the partial elastic member 26 for forming leg gathers include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, ethyl acrylate-ethylene. A thread-like or string-like elastic member made of a polyethylene-α-olefin copolymer such as can be used. It is preferable from the viewpoints of manufacturing cost, simplification of the manufacturing process, and the like that the plurality of elastic members 33 arranged on one side panel are of the same type and arranged at the same elongation rate.
Examples of adhesives for fixing the elastic members 33, 25, and 26 include amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid ester copolymer (EEA), and styrene-butadiene-styrene block copolymer. Polymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / propylene-styrene block copolymer (SEPS), etc. Examples thereof include thermoplastic polymers and mixtures thereof. The adhesive is preferably a hot melt type.

The disposable diaper, the side panel 3, and the side sheet 24 of the present invention have no limitation on the manufacturing method, and can be manufactured by any method.
About the preferable example of the manufacturing method of the side panel in a disposable diaper, the case where the side panel 3 in the diaper 1 is manufactured is demonstrated to an example.

  An example of a preferable manufacturing method of the side panel 3 will be described with reference to FIG. 6. The stretchable sheet manufacturing apparatus 7 shown in FIG. 6 has a pair of longitudinal structures for conveying a yarn arranged in parallel at a predetermined interval. 71, 71 and an elastic member wound around a pair of longitudinal structures for yarn conveyance so that the direction of the elastic members intersects the longitudinal direction of the longitudinal structure for yarn conveyance (R direction in the figure) The body winding means 72 and the elastic member 33 wound around the elastic body winding means 72 and conveyed by the long structure for yarn conveyance are integrally sandwiched between a pair of belt-like sheets 31 ′ and 32 ′. And integrating means 73 to be converted. The longitudinal structure 71 for yarn conveyance has a forward running portion that moves in the R direction and a reverse feeding portion that moves in the opposite direction to the R direction, and only the forward running portion engages with the elastic member 33 to An endless belt that conveys the elastic member 33 in the R direction is preferably used. The endless belt is stretched over a pulley or gear, and is driven by rotating the pulley or gear. Further, only one such endless belt can be used as each individual yarn conveying longitudinal structure 71. However, as shown in FIG. It is preferable to use an endless belt arranged in two upper and lower stages. By providing a difference in speed between the upper and lower belts, the elastic member 33 is spaced in the R direction in the direction of the elastic member 33 that was zigzag in plan view when wound around the pair of longitudinal structures 71 for yarn conveyance. And can be fixed between a pair of belt-like sheets 31 ′ and 32 ′. As the thread conveying longitudinal structure 71, a round bar-like body having grooves and ridges spirally formed on the peripheral surface thereof and driven to rotate around the central axis can also be used.

In a preferred method for manufacturing the side panel 3, as shown in FIG. 6, the reinforcing adhesive layer 63 and the second reinforcing adhesive layer 64 are formed on the belt-like sheet 32 ′ that is the raw sheet 32. Adhesives 63 ′ and 64 ′ are continuously applied in a strip shape by a known adhesive coating machine 75, and then both sides of the strip sheet 32 ′ are covered so as to cover both the adhesives 63 ′ and 64 ′. The part is folded back to the surface not facing the belt-like sheet 31 ′ by a sailor guide (not shown) or the like. On the other hand, an adhesive 34 for forming the main body side adhesive layer 35, the tip side adhesive layer 36 and the intermediate adhesive layer 37 is applied to the belt-like sheet 31 ′ which is the raw sheet of the sheet 31. Each of the machines 76 is continuously applied in a strip shape. The adhesive 34 may be continuously applied to the belt-like sheet 32 ′.
Then, the belt-like sheets 31 ′ and 32 ′ after the adhesive application are merged so that the elastic member 33 in an extended state is sandwiched between them, and the pair of nip rolls 74 as the integration means 73 are used to join them. Apply pressure from above and below to integrate. And the elastic sheet 3 'is obtained by cut | disconnecting the elastic member 33 extended to the side by cutting means 77, such as a cutter provided with the cutting blade.
Then, the obtained elastic sheet 3 ′ is sequentially cut to the length of each side panel by an arbitrary cutting means. In this way, the side panel 3 can be efficiently and continuously produced.

In the manufacturing method of a disposable diaper, a disposable diaper can be manufactured according to a conventionally well-known method except using said side panel 3 (elastic sheet | seat 3 ').
In a preferable manufacturing method, for example, a diaper can be efficiently manufactured by the following procedures (1) to (10) using the side panel 3 (elastic sheet 3 ′). (1) The continuous web of the fastening tape 4 coated with the adhesive for forming the second connection adhesive layer 65 is cut, and the continuous web of the elastic sheet 3 ′ obtained as described above is cut. Install intermittently. (2) The fastening tape 4 is folded and temporarily fixed to the stretchable sheet 3 ′. (3) An adhesive (for main body connection) for forming the connection adhesive layer 62 is continuously applied to the stretchable sheet 3 ′. (4) In order to obtain the side sheet 24, the both sides of the continuous sheet are folded back in a separate process. The elastic member 25 is fixed with an adhesive in an extended state to one of the folded back tops, and the elastic member 26 is fixed to the other folded top with an adhesive in an extended state. Next, the fusion part 28 is provided and integrated in the region 24Z excluding the region 25T where the elastic member 25 is disposed and the region 26T where the elastic member 26 is disposed by heat sealing or the like. (5) A top sheet continuous body is formed by integrating the side sheet 24 and the top sheet 21 obtained in separate steps through a fixing portion 27 by heat sealing or the like and further through an adhesive layer 67. (6) The leak-proof sheet 22a and the outer-layer nonwoven fabric 22b are integrated in a separate process to form the outer-layer composite sheet 22. (7) The stretchable sheet 3 ′ is intermittently cut and attached to the surface sheet 21 (side sheet 24) via the surface side adhesive layer 66, and attached to the outer layer composite sheet 22 via the connection adhesive layer 62. (8) The absorbent body 23 is sandwiched between the top sheet 21 and the outer composite sheet 22 and integrated. (9) Fold both sides of the product (side panel protruding part) inward. (10) Cut into one product.

  The manufacturing method of a disposable diaper can manufacture a disposable diaper according to a conventionally well-known method except manufacturing a disposable diaper using the side panel 3 obtained as mentioned above.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, the disposable diaper of this invention is not restrict | limited to the diaper 1 of the above-mentioned embodiment at all, and can be changed suitably.

  For example, in the diaper 1 of the above-described embodiment, as shown in FIGS. 4 and 5, the side sheet 24 has an edge 24 </ b> I at the inner end of one sheet, which is on the non-skin contact surface side of the sheet (FIG. 4). The sheet is folded back to the middle Q side), but may be folded to the skin contact surface side (P side in FIG. 4) of the sheet. Further, in the diaper 1, the side sheet 24 has an edge 24I of the outer end portion of one sheet on the non-skin contact surface side (Q side in FIG. 4), similarly to the edge 24I of the inner end portion. However, it may be formed by folding back to the skin contact surface side (P side in FIG. 4) of the sheet. That is, the edge 24I at the inner end and the edge 24I at the outer end are both folded back to the non-skin contact surface side (Q side in FIG. 4) or the skin contact surface side (P side in FIG. 4). Just do it.

  Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 3, the side seat | sheet 24 is the fusion | melting part 28 in the whole region of the extension area | region 250T of a solid gather elastic member, and the extension area 260T of a leg gather elastic member. Is not formed, but the region other than the region 25T where the elastic member 25 for forming the three-dimensional gather is arranged in the extending region 250T of the three-dimensional gather elastic member, that is, both the longitudinal direction (Y direction) than the region 25T. A fusion part 28 may be formed in the outer region, and the region other than the region 26T in which the leg gathering elastic member 26 is disposed in the extension region 260T of the leg gather elastic member, that is, the The fusion part 28 may be formed in the region on both outer sides in the longitudinal direction (Y direction) than the region 26T.

  Moreover, in the diaper 1 of the above-mentioned embodiment, although the side sheet 24 is being fixed to the sheet | seat 31 via the surface side adhesive bond layer 66, the fixation by heat fusion other than an adhesive agent may be sufficient.

  Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 4, the sheet | seat 32 which comprises the side panel 3 is folded and it joins with the reinforcement adhesive layer 63 (2nd reinforcement adhesive layer 64). However, it does not have to be folded. Further, even if the sheet 32 constituting the side panel 3 is folded back and joined to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64), the base panel 3b side or the distal end part 3a side of the side panel 3 is used. The end of the sheet 32 may be folded back to the skin contact surface side (P side in FIG. 4), or the sheet 31 may be folded instead of the sheet 32 constituting the side panel 3. Further, both the sheet 32 and the sheet 31 may be folded. Further, instead of folding back the sheet 32 constituting the side panel 3, sheets of different materials may be stacked and joined to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64).

  Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 4, the tape base material 42 of the fastening tape 4 is attached to the non-skin contact surface (surface not the sheet 31 side) side of the sheet 32. The tape base material 42 is joined to the skin contact surface (the surface not the sheet 32 side) side of the sheet 31 with an adhesive or between the sheet 31 and the sheet 32. It may be arranged and joined by an adhesive.

  The disposable diaper of the present invention is, for example, an unfolded disposable diaper in which the side panels 3 and 3 are not provided in addition to the unfolded disposable diaper in which the stretchable side panels 3 and 3 are provided. It may be a pants-type disposable diaper.

  The following disposable diaper is further disclosed regarding the embodiment mentioned above.

<1>
It has a liquid-retaining absorbent body, a surface sheet disposed on the skin contact surface side of the absorbent body, and an outer layer composite sheet disposed on the non-skin contact surface side of the absorbent body. A disposable diaper having a vertically long absorbent main body divided into a ventral part located on the side, a dorsal part located on the dorsal side, and a crotch part disposed between the ventral part and the dorsal part There,
The absorbent main body is folded back along the longitudinal direction on both sides in the width direction of one longitudinally long hydrophobic sheet on each side in the longitudinal direction of the absorbent main body, and the hydrophobic sheet is peeled off from the skin of the top sheet. Provided with a side sheet that is disposed and fixed to the contact surface through the fixing portion along the longitudinal direction of the absorbent main body,
On the inner side in the width direction of the side sheet, the edge of the inner end along the longitudinal direction of the hydrophobic sheet extends to the position of the fixing portion or beyond the fixing portion, or on the skin contact surface side or non-side. An elastic portion for forming a plurality of three-dimensional gathers in a stretched state in the longitudinal direction in the vicinity of the folded-up top portion in the crotch portion, having a folded top portion folded back along the longitudinal direction on the skin contact surface side. The member is disposed and fixed between the hydrophobic sheets,
On the outer side in the width direction of the side sheet, the edge of the outer end portion along the longitudinal direction of the hydrophobic sheet extends to the position of the fixing portion or on the outer side in the width direction along the longitudinal direction. The inner end portion of the skin contact surface side and the non-skin contact surface side has a folded top portion that is folded back to the same side as the folded-back side; A plurality of leg gathering elastic members extending in the longitudinal direction at intervals from the top are disposed and fixed between the hydrophobic sheets,
The side sheet is folded and overlapped in a region excluding the region where the plurality of elastic members for forming three-dimensional gathers and the region where the plurality of elastic members for forming leg gathers are arranged. The adhesive sheets are bonded and fixed by a plurality of intermittently arranged fusion parts, and between the adjacent fusion parts, the hydrophobic sheets are non-joined,
At the time of wearing, at the crotch, due to the contraction force of the elastic member for forming the three-dimensional gather, the inner side in the width direction from the fixed portion of the side seat becomes a three-dimensional gather, and the elastic member is used for forming the leg gather. A disposable diaper in which the outer side in the width direction becomes a leg gather with respect to the fixed portion of the side seat due to contraction force.

<2>
An extension region of the three-dimensional gather elastic member in which the region in which the elastic members for forming the plurality of three-dimensional gathers are arranged extends all over the longitudinal direction of the absorbent main body, and for forming the plurality of leg gathers. An area in which the elastic member is disposed and an extended area of the leg gather elastic member that extends in the entire lengthwise direction of the absorbent main body,
The region excluding the region where the plurality of three-dimensional gather forming elastic members and the region where the plurality of leg gather forming elastic members are arranged are an extension region of the three-dimensional gather elastic member <1 which is a region between the extension region of the leg gather elastic member, and a region between the top portion of the folding on the outer side in the width direction of the side seat and the extension region of the leg gather elastic member. The disposable diaper described in>.
<3>
The said fusion part is a disposable diaper as described in said <1> or <2> distribute | arranged in the shape of a dot.
<4>
The disposable diaper according to any one of <1> to <3>, wherein the side sheet becomes a three-dimensional gather and a leg gather at the crotch when worn.
<5>
In the side sheet, the fusion part is arranged in a dotted shape, and the shape of the fusion part is a circle, an ellipse, a rhombus, a triangle, or a polygonal shape <1> to <4>. The disposable diaper according to any one of the above.
<6>
The fused part is the disposable diaper according to any one of <1> to <5>, wherein one seal pattern area is 0.1 mm ² or more and 3 mm ² or less.
<7>
The disposable diaper according to any one of <1> to <6>, wherein an interval between adjacent fused portions is 1 mm or more and 10 mm or less.
<8>
The disposable diaper according to any one of <1> to <7>, wherein the number of the fusion parts to be arranged is 1 / cm ² or more and 20 / cm ² or less.
<9>
The fusion part has an area of one seal pattern of 0.1 mm ² or more and 3 mm ² or less, an interval between the adjacent fusion parts of 1 mm or more and 10 mm or less, and the number of arrangement is 1 / cm ^2. The disposable diaper according to any one of <1> to <8>, which is 20 or more / cm ² or less.
<10>
The fusion part is formed using heat sealing, ultrasonic sealing, high frequency sealing, or a combination of two or more of these,
As the formation pattern of the fusion part, a linear pattern in which one or more linear fusion parts are formed in the longitudinal direction of the diaper 1, a lattice pattern, or two or more kinds of seal patterns are used in combination. The disposable diaper according to <1> or <2>, which is a shimono.

<11>
The elastic member for forming leg gathers is the disposable diaper according to any one of <1> to <10>, in which an extension rate is larger than an extension rate of the elastic member for forming three-dimensional gathers.
<12>
The elastic members for forming the three-dimensional gathers arranged in the extended state and the elastic members for forming the leg gathers arranged in the extended state are shorter than the length of the absorber,
Any one of the above items <1> to <11>, wherein a length of the elastic member for forming a three-dimensional gather arranged in an extended state is longer than a length of the elastic member for forming a leg gather arranged in an extended state. Disposable diapers described in 1.
<13>
In the crotch part, the region on the outer side in the width direction than the fixing portion of the side sheet is fixed to the outer layer composite sheet with a plurality of continuous adhesives in the longitudinal direction. The disposable diaper according to any one of to <12>.
<14>
In the said back side part, the disposable diaper any one of said <1>-<13> in which the elastic | stretch side panel is distribute | arranged to each of the both sides of an absorptive main body.
<15>
In the back side, stretchable side panels are provided on both sides along the longitudinal direction of the absorbent main body,
The outer layer composite sheet has a liquid-impervious leak-proof sheet and an outer-layer nonwoven fabric bonded to the outer surface side of the leak-proof sheet,
An inner side in the width direction of the side panel is sandwiched and fixed between a portion located in the gap in the top portion of the folded back on the outer side in the width direction of the side sheet and the outer layer nonwoven fabric of the outer layer composite sheet. The disposable diaper according to any one of <1> to <14>.
<16>
The side panel has a main body side adhesive layer, a tip side adhesive layer and a plurality of intermediate adhesive layers,
Each of the adhesive layers is formed to extend in the longitudinal direction of the disposable diaper (Y direction),
In the adhesive layer, a plurality of elastic members are fixed in an extended state between the two sheets via the adhesive constituting the adhesive layer, and the elastic member is not interposed therebetween. The disposable diaper according to <15>, wherein the two sheets are directly joined to each other via the adhesive constituting the adhesive layer.
<17>
The disposable diaper according to <16>, wherein the main body side adhesive layer is formed to be spaced outward from the outer layer adhesive layer in a width direction (X direction) of the disposable diaper.
<18>
The side panel is reinforced with a reinforcing adhesive layer,
The side sheet is fixed to the outer layer composite sheet extending outward in the width direction (X direction) from the side edge of the top sheet through a plurality of connecting adhesive layers continuous in the longitudinal direction. ,
In the disposable diaper width direction (X direction), the main body side adhesive layer, the reinforcing adhesive layer, the connection adhesive layer, and the outer layer adhesive layer are spaced in the diaper width direction (the absence of an adhesive layer). The disposable diaper according to <16> or <17>, wherein the diapers are overlapped so as not to occur.

<19>
The side panel is provided with a fastening tape at the tip, and has two sheets and an elastic member fixed between the two sheets, and the side panel is expanded in a planar shape. The disposable diaper according to any one of <14> to <18>, which is rectangular.
<20>
The side panel has two sheets made of nonwoven fabric and a plurality of elastic members fixed between the two sheets in a state of extending in the disposable diaper width direction (X direction),
The fastening tape provided at the tip of the side panel is for fastening the side panel to other parts,
Each of the elastic members is disposed along the width direction (X direction) of the disposable diaper,
The disposable diaper according to any one of <14> to <19>, wherein the plurality of elastic members in the side panel are arranged at substantially equal intervals in a longitudinal direction (Y direction) of the disposable diaper.
<21>
Of the two sheets constituting the side panel, a sheet located on the outer surface side of the side panel is folded back to the outer surface side of the sheet at the front end portion of the side panel, and the folded portion Is a disposable diaper according to <19> or <20>, wherein the disposable diaper is joined to the outer surface of the sheet via a second reinforcing adhesive layer.
<22>
<1> to <21>, in which the side sheet is integrated in a state where the edge of the inner end portion where the hydrophobic sheet is folded and the edge of the outer end portion folded are joined together. The disposable diaper according to any one of the above.
<23>
The elastic member for forming the three-dimensional gather is the disposable diaper according to any one of <1> to <22>, in which one or more and four or less elastic members are arranged.
<24>
The elastic member for forming the leg gathers is the disposable diaper according to any one of <1> to <23>, in which one or more and four or less elastic members are arranged.
<25>
The disposable diaper according to any one of <1> to <24>, wherein a ratio of the width of the gap to the length W1 in the width direction (X direction) of the side sheet is 5% to 40%.
<26>
The side sheet is formed by integrating the folded inner end portion and the folded outer end portion in a butted state, the folded inner edge portion, and the folded outer portion. The disposable diaper according to any one of <1> to <25>, wherein the edge of the end portion is flush with the other and the side sheet is formed in an annular shape.
<27>
The side sheet is fixed to the outer layer composite sheet extending outward in the width direction (X direction) from the side edge of the top sheet through a plurality of connecting adhesive layers continuous in the longitudinal direction. ,
The fixing portion and the plurality of connecting adhesive layers are formed over substantially the entire length of the absorbent main body,
The connecting adhesive layer is spaced apart in the width direction (X direction), and is wider than the leakage preventing sheet of the outer layer composite sheet and the leakage preventing sheet, which is outside the fixing portion and in the width direction (X direction). The disposable diaper according to any one of <1> to <26>, wherein 2 or more and 10 or less are arranged in a region extending outside the outer layer nonwoven fabric in the direction (X direction).

<28>
The fastening tape has a tape base material,
The disposable diaper according to <19>, in which a nonwoven fabric, a woven fabric, a film, or a laminate sheet thereof is used as the tape base material.
<29>
The disposable diaper according to any one of <1> to <28>, wherein a hydrophilic and liquid-permeable nonwoven fabric or a three-dimensionally apertured film is used as the surface sheet.
<30>
As the outer layer composite sheet, the leakproof sheet is a liquid-impermeable or liquid-impervious (including water repellency) resin film, and the outer layer nonwoven is a nonwoven fabric (air-through nonwoven fabric, spunbond nonwoven fabric, spunlace nonwoven fabric, needle punch). The disposable diaper according to any one of <1> to <29>, wherein a nonwoven fabric is used.
<31>
As the absorbent, an aggregate of fibers such as pulp fibers or an absorbent core in which water-absorbing polymer particles are retained is coated with a core wrap sheet made of water-permeable thin paper or nonwoven fabric. The disposable diaper according to any one of <1> to <30>.
<32>
The disposable diaper according to any one of <1> to <31>, in which a film, a nonwoven fabric, a woven fabric, or a laminate sheet thereof is used as the side sheet constituting the three-dimensional gather and the leg gather.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Absorbent main body 21 Surface sheet 22 Outer layer composite sheet 22a Leakproof sheet 22b Outer layer nonwoven fabric 23 Absorbent body 24 Side sheet 24O Outer edge edge 24I Inner edge edge 24T1, 24T2 Folded top 25 Three-dimensional gather Forming elastic member 25T Area where plural elastic members 25 for forming three-dimensional gathers are arranged 250T Extension area of three-dimensional gathering elastic member 26 Elastic member for forming leg gathers 26T Elastic member for forming plural leg gathers 26T area 260T extension area of leg gather elastic member 24Z area excluding area 25T and area 26T 27 fixing part 28 fusion part 3 side panel 3a side panel tip 3b side panel base end ( Absorbent body end)
30 Intermediate region 31, 32 Sheet 33 Elastic member 35 Main body side adhesive layer 36 Front end side adhesive layer 37 Intermediate adhesive layer 38 Non-adhesive region 4 Fastening tape 41 Fastening portion 42 Tape substrate 5 Landing zone 61 Outer layer adhesive layer 62 adhesive layer for connection 63 adhesive layer for reinforcement 64 second adhesive layer for reinforcement 65 second adhesive layer for connection 66 surface side adhesive layer 67 adhesive layer

Claims (10)

It has a liquid-retaining absorbent body, a surface sheet disposed on the skin contact surface side of the absorbent body, and an outer layer composite sheet disposed on the non-skin contact surface side of the absorbent body. A disposable diaper having a vertically long absorbent main body divided into a ventral part located on the side, a dorsal part located on the dorsal side, and a crotch part disposed between the ventral part and the dorsal part There,
The absorbent main body is folded back along the longitudinal direction on both sides in the width direction of one longitudinally long hydrophobic sheet on each side in the longitudinal direction of the absorbent main body, and the hydrophobic sheet is peeled off from the skin of the top sheet. Provided with a side sheet that is disposed and fixed to the contact surface through the fixing portion along the longitudinal direction of the absorbent main body,
On the inner side in the width direction of the side sheet, the edge of the inner end along the longitudinal direction of the hydrophobic sheet extends to the position of the fixing portion or beyond the fixing portion, or on the skin contact surface side or non-side. An elastic portion for forming a plurality of three-dimensional gathers in a stretched state in the longitudinal direction in the vicinity of the folded-up top portion in the crotch portion, having a folded top portion folded back along the longitudinal direction on the skin contact surface side. The member is disposed and fixed between the hydrophobic sheets,
On the outer side in the width direction of the side sheet, the edge of the outer end portion along the longitudinal direction of the hydrophobic sheet extends to the position of the fixing portion or on the outer side in the width direction along the longitudinal direction. The inner end portion of the skin contact surface side and the non-skin contact surface side has a folded top portion that is folded back to the same side as the folded-back side; A plurality of elastic members for forming leg gathers are arranged and fixed between the hydrophobic sheets in a stretched state in the longitudinal direction at intervals from the top.
The side sheet is folded and overlapped in a region excluding the region where the plurality of elastic members for forming three-dimensional gathers and the region where the plurality of elastic members for forming leg gathers are arranged. The adhesive sheets are joined and fixed by a plurality of intermittently disposed fusion parts, and the hydrophobic sheets between the adjacent fusion parts are in a non-joined state,
At the time of wearing, at the crotch, due to the contraction force of the elastic member for forming the three-dimensional gather, the inner side in the width direction from the fixed portion of the side seat becomes a three-dimensional gather, and the elastic member for forming the leg gather A disposable diaper in which the outer side in the width direction becomes a leg gather with respect to the fixed portion of the side seat due to contraction force. An extension region of the three-dimensional gather elastic member in which the region in which the elastic members for forming the plurality of three-dimensional gathers are arranged extends all over the longitudinal direction of the absorbent main body, and for forming the plurality of leg gathers. An area in which the elastic member is disposed and an extended area of the leg gather elastic member that extends in the entire lengthwise direction of the absorbent main body,
The region excluding the region where the plurality of three-dimensional gather forming elastic members and the region where the plurality of leg gather forming elastic members are arranged are an extension region of the three-dimensional gather elastic member 2. The region between the extension region of the leg gather elastic member and the region between the top of the folded back on the outer side in the width direction of the side seat and the extension region of the leg gather elastic member. Disposable diapers described in 1.   The disposable diaper according to claim 1 or 2, wherein the fused part is arranged in a dotted shape.   The disposable diaper according to claim 1, wherein, when worn, the side sheet becomes a three-dimensional gather and a leg gather at the crotch. The fusion part has an area of one seal pattern of 0.1 mm ² or more and 3 mm ² or less, an interval between the adjacent fusion parts of 1 mm or more and 10 mm or less, and the number of arrangement is 1 / cm ^2. The disposable diaper according to any one of claims 1 to 4, wherein the number is 20 / cm ² or less.   The disposable diaper according to any one of claims 1 to 5, wherein the elastic member for forming leg gathers has an expansion rate greater than that of the elastic member for forming three-dimensional gathers. The elastic members for forming the three-dimensional gathers arranged in the extended state and the elastic members for forming the leg gathers arranged in the extended state are shorter than the length of the absorber,
The length of the elastic member for forming three-dimensional gathers arranged in an extended state is longer than the length of the elastic member for forming leg gathers arranged in an extended state. Disposable diapers.   In the crotch part, the region on the outer side in the width direction from the fixing portion of the side sheet is fixed to the outer layer composite sheet with a plurality of continuous adhesives in the longitudinal direction. The disposable diaper according to any one of 7 above. In the back side, stretchable side panels are provided on both sides along the longitudinal direction of the absorbent main body,
The outer layer composite sheet has a liquid-impervious leak-proof sheet and an outer layer nonwoven fabric bonded to the non-skin contact surface side of the leak-proof sheet,
An inner side in the width direction of the side panel is sandwiched and fixed between a portion located in the gap in the top portion of the folded back on the outer side in the width direction of the side sheet and the outer layer nonwoven fabric of the outer layer composite sheet. The disposable diaper according to any one of claims 1 to 8.   10. The side sheet according to claim 1, wherein an edge of the inner end portion where the hydrophobic sheet is folded and an edge of the folded outer end portion are integrated in a butted state. The disposable diaper described in the item.

Images