JP6847126B2 - Disposable diapers - Google Patents

Description

The present invention relates to disposable diapers.

Conventionally, a deployable disposable diaper in which an elastic side panel that expands and contracts in the width direction of the absorbent body is attached to a portion of the absorbent body including an absorbent body that is arranged on the back side of the wearer when worn. Are known. Since this type of disposable diaper is attached by pulling a fastening tape or the like provided at the tip of the side panel, the structure of the joint is described from the viewpoint of the strength of the joint between the side panel and the absorbent body. What has been considered has been proposed.

For example, the applicant has first described that the side panel has two sheets and an elastic member fixed between the two sheets, and a fastening tape is provided at the tip portion, and the outer layer composite sheet is provided. Has a leak-proof sheet and an outer layer non-woven fabric bonded to the outer surface side of the leak-proof sheet via an outer layer adhesive layer, and a side panel has an end portion of an elastic member on the absorbent body side or its vicinity. It has an adhesive layer on the main body side that is fixed and an adhesive layer on the tip side that fixes the end portion of the elastic member on the tip end side of the side panel or its vicinity, and is on the absorbent main body side of the side panel. The end of the body is reinforced with a reinforcing adhesive layer that overlaps or is continuous with the main body side adhesive layer, and the reinforced end is joined to the outer layer composite sheet by the connecting adhesive layer. In the diaper width direction, the main body side adhesive layer is formed so as to be separated outward from the outer layer adhesive layer, and the main body side adhesive layer, the reinforcing adhesive layer, and the connection adhesive are formed. We have proposed a disposable diaper in which the agent layer and the outer layer adhesive layer are provided so as not to form a gap in the diaper width direction (Patent Document 1). Such a disposable diaper can increase the joint strength between the side panel and the absorbent main body while suppressing a decrease in flexibility and the like.

Japanese Unexamined Patent Publication No. 2013-46751

The present invention relates to a disposable diaper including an absorbent body and an absorbent body including an outer layer composite sheet arranged on the outer surface side of the absorbent body, and side panels attached to one or both sides of the absorbent body. .. The side panel has two sheets and an elastic member fixed between the two sheets, and a fastening tape is provided at the tip end portion. The outer layer composite sheet has a liquid-impermeable or liquid-impermeable leak-proof sheet and an outer-layer non-woven fabric bonded to the outer surface side of the leak-proof sheet via an outer layer adhesive layer. The side panel is joined to the outer layer composite sheet and the skin side sheet arranged on the inner surface side of the side panel via a connecting adhesive layer. The connecting adhesive layer joins the side panel and the outer layer composite sheet on the outer side of the inner side edge of the side panel in the width direction of the disposable diaper, and the side panel. The outer layer composite sheet and the skin side sheet are bonded to each other on the inner side of the inner side edge of the above. The outer layer adhesive layer has an intermittent portion in which no adhesive is arranged at a position overlapping the inner side edge of the side panel in the thickness direction of the disposable diaper.

FIG. 1 is a plan view showing an unfolded and extended state of a disposable diaper according to an embodiment of the present invention. FIG. 2 is a perspective view showing a wearing state of the disposable diaper shown in FIG. FIG. 3 is an enlarged plan view showing the side panel of the disposable diaper shown in FIG. 1 and its vicinity. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is an enlarged cross-sectional view showing a joining mode of each component member in the vicinity of the inner side edge of the side panel shown in FIG.

Detailed description of the invention

The diaper described in Patent Document 1 can suppress the occurrence of tearing or tearing at or near the joint portion between the side panel and the absorbent main body when the diaper is attached by pulling the fastening tape or the like provided at the tip end portion of the side panel. However, there was room for improvement in the strength of the outer layer composite sheet arranged on the outer surface side of the absorbent body.

An object of the present invention is to provide a disposable diaper that can solve the drawbacks of the prior art.

Hereinafter, the present invention will be described based on the preferred embodiment thereof with reference to the drawings.
As shown in FIG. 1, the disposable diaper 1 of the present invention (hereinafter, also referred to as diaper 1) includes an absorbent body 23 and an absorbent main body 2 including an outer layer composite sheet 22 arranged on the outer surface side of the absorbent body 23. Side panels 3 and 3 attached to both sides of the absorbent body 2 are provided.

As shown in FIG. 1, the absorbent main body 2 has a vertically long shape in the deployed and extended state, and is located on the ventral side of the wearer when worn and on the dorsal side of the wearer. It has a dorsal side portion B and a lower crotch portion C located in the crotch portion. As shown in FIG. 1, the absorbent main body 2 has a rectangular shape when expanded in a plane. The side panels 3 and 3 are attached to both side portions of the absorbent main body 2 on the back side portion B so as to project outward from both side edges of the absorbent main body 2, respectively.
Here, the unfolded and stretched state of the diaper 1 is the design dimension of the unfolded diaper 1 by stretching the elastic members of each part (the same as the dimensions when the diaper 1 is unfolded in a plane state without any influence of the elastic members). The state of being expanded until it becomes.

The longitudinal direction of the disposable diaper 1 is the Y direction in the drawing, which is the same direction as the longitudinal direction of the absorbent body. The width direction of the disposable diaper 1 is the X direction in the drawing, which is the same direction as the width direction of the absorbent body 2. In the following description, the longitudinal direction of the diaper 1 or the direction corresponding to the longitudinal direction of the diaper 1 component simply corresponds to the Y direction, the width direction of the diaper 1, or the diaper width direction of the component of the diaper 1. The direction is also simply referred to as the X direction. Further, the inner surface of the diaper 1 and the constituent members of the diaper 1 is a surface facing the wearer's skin side when worn, and the outer surface of the constituent members of the diaper 1 and the diaper 1 is the surface of the wearer's skin when worn. The side facing the other side. Further, the inner side of the diaper 1 and the constituent members of the diaper 1 is the absorbent main body side in the width direction of the diaper 1, and the outer side of the constituent members of the diaper 1 and the diaper 1 is fastening in the width direction of the diaper 1. This is the tape 4 side.

As shown in FIGS. 1 and 4, the absorbent body 2 includes a liquid-permeable surface sheet 21, an outer layer composite sheet 22, and a liquid-retaining absorber 23 interposed between the two sheets 21 and 22. have. The outer layer composite sheet 22 has a leak-proof sheet 22a that is impermeable to liquid or impervious to liquid (including water repellency), and an outer layer adhesive layer 61 on the outer surface side (Q side in FIG. 4) of the leak-proof sheet 22a. It has an outer layer non-woven fabric 22b bonded via the outer layer. The outer-layer non-woven fabric 22b has the same plan-view shape as the absorbent body 2, and the leak-proof sheet 22a has the same plan-view shape as the outer-layer non-woven fabric 22b except that the width in the X direction is slightly smaller as shown in FIG. are doing. Due to the presence of the outer layer non-woven fabric 22b, the outer surface of the diaper is soft to the touch.

Further, as shown in FIG. 1, sheets 24, 24 for forming a three-dimensional guard are arranged on both sides of the absorbent main body 2 in the longitudinal direction. As shown in FIG. 4, the three-dimensional guard forming sheet 24 has a surface sheet 21, an outer layer composite sheet 22 extending from a side edge of the surface sheet, and a side panel 3 on both sides of the absorbent body 2 in the longitudinal direction. It is fixed to the constituent sheet 31 via the adhesive layers 62, 66 to 68. The adhesive layers 62, 66, 67 are formed over substantially the entire length of the absorbent body 2, while the adhesive layer 68 is provided on the ventral side A and the dorsal side B, while the inseam is provided. Not provided in C.
Each three-dimensional guard forming sheet 24 has an elastic member 25 for forming a three-dimensional guard along the edge near the inner edge of the absorbent body 2 in the width direction (X direction), and is worn when worn. Due to the contraction force of the elastic member 25, a portion of the crotch portion C having a predetermined width from the edge thereof is separated from the surface sheet 21 to form a three-dimensional guard. Further, as shown in FIG. 1, elastic members 26 for forming leg gathers are arranged in the portions arranged around the legs on both sides of the absorbent body 2 in the longitudinal direction.

In the present embodiment, one sheet is used as the three-dimensional guard forming sheet 24 without folding. Instead of this, one sheet may be used in which one sheet is folded into a two-layer structure, and the two layers are joined by heat-sealing portions arranged in a scattered pattern to form a single sheet. it can. Further, it is also possible to use one sheet as a two-layer structure only at the portion where the elastic member 25 is fixed.

For heat fusion that joins the layers of the two-layer structure portion, for example, a heat seal, an ultrasonic seal, a high frequency seal, or a combination of two or more of these can be used. It is also possible to join with an adhesive arranged in a scattered pattern.
Further, the seal pattern is preferably a dot pattern in which heat-sealed portions are formed in a scattered spot shape, but is not limited thereto. For example, the linear heat-sealed portions are 1 in the longitudinal direction of the diaper 1. It may be a linear pattern in which a book or a plurality of lines are formed, a grid pattern, or the like. Further, two or more kinds of seal patterns may be used in combination.

The three-dimensional guard forming sheet 24 in the diaper 1 forms the inner surfaces of both side portions of the absorbent body 2. Further, the three-dimensional guard forming sheet 24 is joined to both side portions of the surface sheet 21 arranged on the inner surface side of the absorber 23.
The surface sheet 21 and the pair of three-dimensional guard forming sheets 24 arranged on the inner surface side in a state where a part of the surface sheet 21 is overlapped on both sides in the Y direction are attached to the wearer's skin when the diaper 1 is worn. The facing skin side sheet 20 is formed. The skin side sheet 20 in the diaper 1 is composed of a surface sheet 21 and a three-dimensional guard forming sheet 24 connected to both sides thereof. The skin side sheet 20 may be arranged on the inner surface side of the side panel 3 at least in a portion overlapping the side panel 3. The skin side sheet may be composed of only the surface sheet.
The "inner surface side of the seat" is the P side in FIG. 4 (the side facing the skin side of the side panel wearer), and the "outer surface side of the seat" is the Q side in FIG. 4 (the side panel wearer). The side facing the opposite side of the skin).

As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to the longitudinal center line CL that bisects the absorbent body 2 in the width direction (X direction). Therefore, the configurations of the side panels 3 and 3 and the joining mode between them and the absorbent main body 2 and the fastening tape 4 will be mainly described by taking the left side panel of FIG. 1 as an example, but the right side panel is also left and right. It is the same except that it is symmetric.

As shown in FIG. 3, the side panel 3 in the diaper 1 has a rectangular shape when expanded in a plane. Further, as shown in FIG. 4, the side panel 3 is fixed between the two sheets 31 and 32 made of non-woven fabric and the two sheets 31 and 32 in a state of being extended in the diaper width direction (X direction). It has a plurality of elastic members 33. A fastening tape 4 for fixing the side panel 3 to another portion is provided on the tip portion 3a of the side panel 3. As shown in FIG. 4, the fastening tape 4 is bonded to the sheet 32 on the outer surface side of the side panel 3 via the adhesive layer 65.
As shown in FIG. 3, the elastic members 33 are arranged along the width direction (X direction) of the diaper 1, respectively. Further, 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. 4, in the side panel 3 of the diaper 1, two sheets 31, 32 constituting the side panel 3 are joined via adhesive layers 35, 36, 37. All of these adhesive layers 35, 36, and 37 are formed so as to extend in the longitudinal direction (Y direction) of the diaper. Further, in these adhesive layers 35, 36, 37, a plurality of elastic members 33 are fixed in an elongated state between the two sheets 31, 32 via the adhesive constituting each adhesive layer. At the same time, in the portion where the elastic member 33 does not intervene, the two sheets 31 and 32 are directly bonded to each other via the adhesive constituting each adhesive layer.

The adhesive layer 35 is provided on the absorbent main body 2 side in the extending direction of the side panel 3, and fixes the end portion of each elastic member 33 on the absorbent main body 2 side or its vicinity. The adhesive layer 36 is provided on the tip portion 3a side of the side panel 3 in the extending direction, and fixes the end portion of each elastic member 33 on the tip portion 3a side of the side panel 3 or its vicinity. .. As shown in FIG. 3, a plurality of adhesive layers 37 are provided in the intermediate region 30 which is a region between the adhesive layer 35 and the adhesive layer 36 in the extending direction of the side panel 3. The width of the adhesive layer 37 is smaller than that of both the adhesive layers 35 and 36, and a plurality of adhesive layers 37 are intermittently formed in the intermediate region 30, but are continuous in the width direction (X direction) of the diaper. It may be formed. The adhesive layer 37 may be formed continuously with any one or both of the above-mentioned both adhesive layers 35 and 36. In the diaper 1 of the present embodiment, the extending direction of the side panel 3 coincides with the diaper width direction.

As shown in FIG. 3, the adhesive layers 35, 36, and 37 intersect with a plurality of (more preferably three or more) elastic members 33 extending in the X direction in the longitudinal direction of the diaper (Y direction). It is extending. It is preferable that all of these adhesive layers 35, 36, and 37 intersect with all the elastic members 33 extending in the X direction and extend in the longitudinal direction (Y direction) of the diaper, and the upper and lower edges 3u of the side panel 3 It is more preferable that the total length is between 3, 3d.

As shown in FIG. 4, the side panel 3 has a sheet 32 located on the outer surface side (Q side in FIG. 4) of the two sheets 31 and 32 constituting the side panel 3. Both ends 3a and 3b of the side panel 3 are folded back toward the inner surface side (Q side in FIG. 4) of the sheet 32, and the folded portions are folded back via the reinforcing adhesive layers 63 and 64, respectively. It is joined to the inner surface of 32.
On the other hand, of the two sheets 31 and 32 constituting the side panel 3, the sheet 31 located on the inner surface side (P side in FIG. 4) of the side panel 3 is also on the outer surface side and the inner surface side of the sheet 31. Is not folded back.
In this way, the two sheets 31 and 32 constituting the side panel 3 are also folded back to the outer surface side (Q side in FIG. 4) or the inner surface side (P side in FIG. 4) of the sheets 31 and 32. It may be, and it does not have to be folded back.

In the side panel 3 of the present embodiment, as shown in FIG. 4, reinforcing adhesive layers 63 and 64 are formed on both ends 3a and 3b of the sheet 32 on the outer surface side in the width direction, respectively. As shown in FIG. 4, the reinforcing adhesive layers 63 and 64 formed on both end portions 3a and 3b in the width direction of the two sheets 31 and 32 constituting the side panel 3 are on the outer surface side of the side panel 3. The sheet 32 located on the (Q side in FIG. 4) may be formed on the portion folded back toward the inner surface side, but the sheet 32 located on the outer surface side (Q side in FIG. 4) of the side panel 3 may be formed. It may be formed in a portion folded back to the outer surface side. In either case, the bonding strength of the side panel 3 is improved by forming the reinforcing adhesive layer. As shown in FIG. 4, the reinforcing adhesive layers 63 and 64 may be continuous with the adhesive layers 35 and 36 joining the two sheets 31 and 32, respectively, and are not continuous. You may.
It should be noted that none of the two sheets 31 and 32 constituting the side panel 3 need to have folded portions at both end portions 3a and 3b in the width direction.

The side panel 3 is joined to the outer layer composite sheet 22 and the skin side sheet 20 arranged on the inner surface side of the side panel 3 via a connecting adhesive layer 62. The connecting adhesive layer 62 joins the side panel 3 and the outer layer composite sheet 22 on the outer side of the inner side edge 3c of the side panel 3 in the X direction, and is inside the side panel 3. The outer layer composite sheet 22 and the skin side sheet 20 are bonded to each other on the inner side of the side edge 3c. More specifically, as shown in FIG. 5, the connecting adhesive layer 62 is arranged on the outer side and the inner side of the inner side edge 3c of the side panel 3, and the side on the outer side. The inner end 3b of the panel 3 and the leak-proof sheet 22a are joined, and the leak-proof sheet 22a and the three-dimensional guard forming sheet 24 or the surface sheet 21 are joined on the inner side. ing.

In the present embodiment, as shown in FIG. 4, the connecting adhesive layer 62 is separated from the adhesive layer 66 that joins the sheet 31 on the inner surface side of the side panel 3 and the three-dimensional guard forming sheet 24. However, it may be continuous with the adhesive layer 66. Further, as shown in FIG. 4, the connecting adhesive layer 62 is separated from the adhesive layer 67 that joins the surface sheet 21 and the three-dimensional guard forming sheet 24, but is separated from the adhesive layer 67. It may be continuous.

As shown in FIG. 5, the outer layer adhesive layer 61 joins the leak-proof sheet 22a constituting the outer layer composite sheet 22 and the outer layer non-woven fabric 22b, and further inside the side panel 3 in the thickness direction Z of the diaper 1. An intermittent portion 7 to which an adhesive is not arranged is provided at a position overlapping the side edge 3c.
In the intermittent portion 7, the leak-proof sheet 22a is not joined to the outer-layer non-woven fabric 22b, so that the leak-proof sheet 22a easily extends in the width direction (X direction). As a result, when the side panel 3 is pulled outward and the diaper 1 is attached, it is possible to suppress the local concentration of strain on the leak-proof sheet 22a, and the leak-proof sheet 22a is less likely to tear in the width direction. Become.
On the other hand, the outer surface of the leak-proof sheet 22a is continuously joined to the outer-layer non-woven fabric 22b via the outer layer adhesive layer 61 in the width direction, and the inner surface of the leak-proof sheet 22a has the connecting adhesive layer 62. When the side panel 3 and the surface sheet 21 are continuously bonded to each other in the width direction, the leak-proof sheet 22a is difficult to extend inward or outward in the width direction (X direction). Therefore, when the side panel 3 is pulled outward, tension is applied outward to the leak-proof sheet 22a via the connecting adhesive layer 62, and the side panel 3 is locally distorted in the vicinity of the inner side edge 3c of the side panel 3. Concentrate. As a result, the leak-proof sheet 22a may be torn at a portion overlapping the inner side edge 3c in the thickness direction Z of the diaper.

The intermittent portion 7 is arranged at a position overlapping the inner side edge 3c of the side panel 3 in the thickness direction Z. The position overlapping with the inner side edge 3c is shown using the inner side edge line 3cL (see FIG. 5).
From the viewpoint of further suppressing the leakage-proof sheet 22a from tearing in the width direction, the length W1 (see FIG. 5) of the intermittent portion 7 in the width direction (X direction) is preferably 1 mm or more, more preferably 1.5 mm or more. It is preferably 5 mm or less, more preferably 3 mm or less, preferably 1 mm or more and 5 mm or less, and more preferably 1.5 mm or more and 3 mm or less.
Further, when the intermittent portion 7 is divided into an inner side portion 7a and an outer side portion 7b with the inner side edge line 3cL of the side panel 3 as a boundary, the inner side portion 7a in the width direction (X direction) The length W1a (see FIG. 5) is preferably 0.5 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 3 mm or less, preferably 0.5 mm or more and 5 mm or less, more preferably. Is 1 mm or more and 3 mm or less. Further, the length W1b (see FIG. 5) of the outer side portion 7b in the width direction (X direction) is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably. It is 3 mm or less, preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less.

In the present specification, the dimensions and the like of each part such as the intermittent portion 7 are the design dimensions (the influence of the elastic member is completely eliminated) by extending the elastic member such as the elastic member 33 and making the side panel and the diaper flat. Measure in the expanded state until the dimensions are the same as when expanded).

As shown in FIG. 5, the outer layer adhesive layer 61 has a width of a portion 71 in which the adhesive is arranged in a region R overlapping the vicinity thereof including the inner side edge 3c of the side panel 3 in the thickness direction Z of the diaper 1. It has a striped coating portion 70 that is intermittently arranged in the direction (X direction). A portion 72 to which the adhesive is not arranged is arranged between the portions 71 to which the adhesive is arranged, and one of the portions 72 constitutes the above-mentioned intermittent portion 7. With such a configuration, when the side panel 3 is pulled outward in the width direction, it is possible to further prevent the strain on the leak-proof sheet 22a from being locally concentrated in the region near the inner side edge 3c. .. As described above, the outer layer adhesive layer 61 preferably has the stripe coating portion 70 in the region R overlapping the inner side edge 3c of the side panel 3 and its vicinity in the thickness direction Z of the diaper 1. Further, in the stripe coating portion 70, it is preferable that one of the portions 72 where the adhesive is not arranged, which is located between the portions 71 where the adhesive is arranged, constitutes the intermittent portion 7. The stripe coating portion 70 may have two or more portions 72 to which the adhesive including the intermittent portion 7 is not arranged.
The stripe coating portion 70 may be arranged in the region R overlapping the inner side edge 3c of the side panel 3 and its vicinity in the thickness direction Z of the outer layer adhesive layer 61, and the entire width direction of the outer layer adhesive layer 61. It may be arranged over. The region R overlapping the inner side edge 3c of the side panel 3 and its vicinity is a region within 10 mm on each side of the inner side edge 3c in the width direction (X direction).

From the viewpoint of more reliably achieving the above effect, the length W2 (see FIG. 5) of the portion 71 in which the adhesive is arranged in the width direction (X direction) is preferably 0.5 mm or more, more preferably 1 mm or more. It is preferably 3 mm or less, more preferably 2 mm or less, preferably 0.5 mm or more and 3 mm or less, and more preferably 1 mm or more and 2 mm or less.
Further, the length W2 (see FIG. 5) of the portion 71 in which the adhesive is arranged in the width direction (X direction) is relative to the length W3 (see FIG. 5) of the portion 72 in which the adhesive is not arranged. It is preferably 20% or more, more preferably 30% or more, preferably 100% or less, more preferably 80% or less, preferably 20% or more and 100% or less, and more preferably 30% or more and 80% or less. is there.
Further, the length W3 (see FIG. 5) of the portion 72 in which the adhesive is not arranged in the width direction (X direction) is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 5 mm or less. It is more preferably 3 mm or less, preferably 1 mm or more and 5 mm or less, and more preferably 1.5 mm or more and 3 mm or less.

On the outer side of the inner side edge 3c of the side panel 3, the outer layer composite sheet 22 has a shear strength in the width direction between the leakage-proof sheet 22a and the outer-layer non-woven fabric 22b, and the tension of the leakage-proof sheet 22a in the width direction. It is preferably greater than the strength. With such a configuration, the joint strength between the side panel 3 and the absorbent main body 2 is more reliably ensured against the load in the shearing direction applied to the outer layer adhesive layer 61 when the side panel 3 is pulled outward in the width direction. be able to. Whether the shear strength of the outer layer composite sheet 22 is larger than the tensile strength of the leak-proof sheet 22a is determined before the leak-proof sheet 22a and the outer-layer non-woven fabric 22b are peeled off when the side panel 3 is pulled. It can be determined by splitting 22a in the width direction (X direction). A method for confirming the magnitude relationship between the shear strength of the outer layer composite sheet 22 and the tensile strength of the leak-proof sheet 22a in more detail is shown below. The portion of the side panel 3 shown in FIG. 5 including the portion near the inner side edge 3c is used as a rectangular sample piece having a long side in the width direction (X direction) and a short side in the longitudinal direction (Y direction). Cut out from. The leak-proof sheet 22a and the outer layer non-woven fabric 22b of the sample piece are cut in the longitudinal direction (Y direction) at a position corresponding to the inner side edge line 3 cL. After that, the side panel 3 of the sample piece and the CL side of the center line in the longitudinal direction from the inner side edge line 3cL of the absorbent body 2 are sandwiched, and the sample piece is oriented in the width direction (X direction) until it breaks. pull. At this time, if the leak-proof sheet 22a is torn in the width direction (X direction) before the leak-proof sheet 22a and the outer layer non-woven fabric 22b are peeled off, the shear strength of the outer layer composite sheet 22 is the tensile strength of the leak-proof sheet 22a. Can be judged to be larger than.
The shear strength of the outer layer composite sheet 22 can be increased by means such as firmly pressing the leak-proof sheet 22a and the outer layer non-woven fabric 22b via the adhesive 61, or pressing while heating.

The tensile strength of the leak-proof sheet 22a in the width direction (X direction) is preferably 100 cN / 25 mm or more, more preferably 150 cN / 25 mm or more, and preferably 400 cN / 25 mm or less, more preferably 300 cN / 25 mm or less. It is preferably 100 cN / 25 mm or more and 400 cN / 25 mm or less, and more preferably 150 cN / 25 mm or more and 300 cN / 25 mm or less. This tensile strength is measured as follows. First, the outer layer non-woven fabric 22b and the leak-proof sheet 22a are separated from the diaper 1 using a solvent that solubilizes the adhesive or a cold spray. The separated leak-proof sheet 22a is cut into strip-shaped sample pieces having a width of 25 mm in the longitudinal direction (Y direction) and a width of about 100 mm in the width direction (X direction). For this sample piece, the maximum point load when the sample piece was pulled in the direction corresponding to the diaper width direction (X direction) was measured using a tensile tester (Orientec Co., Ltd. "Tencilon" RTC-1150A). The measured maximum point load is taken as the tensile strength of the leak-proof sheet 22a. At this time, the chuck interval is 50 mm and the pulling speed is 300 mm / min.

Further, the outer layered nonwoven fabric 22b preferably has a higher tensile strength in the width direction (X direction) than the leak-proof sheet 22a. With such a configuration, by pulling the side panel 3 outward in the width direction, even if a load is applied to the outer layered nonwoven fabric 22b in the width direction, it is possible to further suppress the outer layered nonwoven fabric 22b from being torn in the width direction.
From the viewpoint of more reliably achieving the above effects, the tensile strength of the outer layer nonwoven fabric 22b in the width direction (X direction) is preferably 300 cN / 25 mm or more, more preferably 400 cN / 25 mm or more, and preferably 1000 cN / 25 mm. Below, it is more preferably 800 cN / 25 mm or less, preferably 300 cN / 25 mm or more and 1000 cN / 25 mm or less, and more preferably 400 cN / 25 mm or more and 800 cN / 25 mm or less. The tensile strength of the outer layer nonwoven fabric 22b is measured by the same method as the tensile strength of the leak-proof sheet 22a described above.

As shown in FIG. 5, the leak-proof sheet 22a has the outer side edge 22a1 of the leak-proof sheet 22a outside the inner side edge 3c of the side panel 3 in the width direction (X direction). It is located on the inner side of the outer side edge 22b1 of the outer layer non-woven fabric 22b. In other words, the outer side edge 22a1 of the leak-proof sheet 22a is located between the outer side edge 22b1 of the outer layered nonwoven fabric 22b and the inner side edge 3c of the side panel 3 in the width direction (X direction). There is. The portion of the outer layered nonwoven fabric 22b extending from the outer side edge 22a1 of the leak-proof sheet 22a is also referred to as an extending portion 22b2. Then, in the side panel 3, the inner end portion 3b of the side panel 3 is joined to the extending portion 22b2 of the outer layer non-woven fabric 22b via the connecting adhesive layer 62 in the width direction (X direction). In the connecting adhesive layer 62, the portion that joins the inner end portion 3b of the side panel 3 and the extending portion 22b2 of the outer layer non-woven fabric 22b is also referred to as an extending adhesive portion 62a. With such a configuration, a portion for directly joining the side panel 3 and the outer layer non-woven fabric 22b is provided. Therefore, when the side panel 3 is pulled outward in the width direction, the joint portion between the leak-proof sheet 22a and the outer layer non-woven fabric 22b is formed. The load in the shearing direction applied can be made lower. As described above, in the width direction, the outer side edge 22a1 of the leak-proof sheet 22a is outside the inner side edge 3c of the side panel 3 and inside the outer side edge 22b1 of the outer layered nonwoven fabric 22b. The side panel 3 is located on the side, and the side panel 3 has an extending portion 22b2 in which the inner end portion 3b of the side panel 3 extends from the outer side edge of the leak-proof sheet 22a in the outer layered nonwoven fabric 22b in the width direction. , It is preferable that they are joined via the connecting adhesive layer 62.

From the viewpoint of more reliably achieving the above effect, the length W5 (see FIG. 5) of the extending portion 22b2 of the outer layered nonwoven fabric 22b in the width direction (X direction) is preferably 5 mm or more, more preferably 10 mm or more. It is preferably 30 mm or less, more preferably 20 mm or less, preferably 5 mm or more and 30 mm or less, and more preferably 10 mm or more and 20 mm or less.
Further, the length W6 (see FIG. 5) of the extending adhesive portion 62a in the connecting adhesive layer 62 is preferably 30% or more, more preferably 30% or more, based on the length W5 of the extending portion 22b2 of the outer layered nonwoven fabric 22b. It is 60% or more, preferably 100% or less, more preferably 90% or less, preferably 30% or more and 100% or less, and more preferably 60% or more and 90% or less.
The length W6 (see FIG. 5) of the extended adhesive portion 62a in the connecting adhesive layer 62 is preferably 3 mm or more, more preferably 5 mm or more, and preferably 20 mm or less, more preferably 10 mm or less. Yes, preferably 3 mm or more and 20 mm or less, and more preferably 5 mm or more and 10 mm or less.

As shown in FIG. 5, the connecting adhesive layer 62 has an intermittent portion 75 in which no adhesive is arranged in the vicinity of the inner side edge 3c of the side panel 3. With such a configuration, it is possible to further suppress the local concentration of strain on the leak-proof sheet 22a. As described above, as shown in FIG. 5, the connecting adhesive layer 62 has an intermittent portion 75 to which no adhesive is arranged at a position where the diaper 1 overlaps with the inner side edge 3c of the side panel 3 in the thickness direction Z of the diaper 1. It is preferable to have.

From the viewpoint of more reliably achieving the above effects, the length W4 (see FIG. 5) of the intermittent portion 75 of the connecting adhesive layer 62 in the width direction (X direction) is preferably 1 mm or more, more preferably 1. It is 5 mm or more, preferably 5 mm or less, more preferably 3 mm or less, preferably 1 mm or more and 5 mm or less, and more preferably 1.5 mm or more and 3 mm or less.
Further, when the intermittent portion 75 of the connecting adhesive layer 62 is divided into an inner side portion 75a and an outer side portion 75b with the inner side edge 3c of the side panel 3 as a boundary, in the width direction (X direction), The length W4a (see FIG. 5) of the inner side portion 75a is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 3 mm or less, preferably 0.5 mm. It is 5 mm or more, more preferably 1 mm or more and 3 mm or less. Further, the length W4b (see FIG. 5) of the outer side portion 75b in the width direction (X direction) is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably. It is 3 mm or less, preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less.
In the present embodiment, the length W4 of the intermittent portion 75 of the connecting adhesive layer 62 in the width direction (X direction) is the length of the intermittent portion 7 of the outer layer adhesive layer 61 in the width direction (X direction). It is the same as W1, but the lengths W1 and W4 in the width direction of both intermittent portions 7, 75 may be different from each other.

When the diaper 1 is attached to the wearer, the fastening tape 4 is pulled by hand, the side panel 3 is extended, and the fastening portion 41 of the fastening tape 4 is pressed against the landing zone 5 to fasten the diaper 1. To do.

The above-mentioned connecting adhesive layer 62, outer layer adhesive layer 61, and each adhesive layer 35, 36, 37, 63, 64, 65 are known on one or both of the two sheets sandwiching the respective adhesive layers. After applying the adhesive by the method of the above, it can be formed by superimposing the two sheets and pressurizing them.

The coating pattern of the adhesive forming each adhesive layer is preferably so-called solid coating using a spray gun, a coater gun or the like as the adhesive coating machine, but the bead gun as the adhesive coating machine. , Spiral spray gun, omega-shaped spray gun, transfer roll, etc. can be used to apply patterns such as linear, spiral-shaped, omega-shaped, and dot-shaped.

For the side panel 3, various sheet materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used as the sheets 31 and 32 constituting the side panel 3 without particular limitation. .. From the viewpoint of preventing distortion from occurring in the vicinity of the inner side edge 3c of the side panel 3 when the side panel 3 is pulled outward in the width direction, the side panel 3 is formed by two non-stretchable sheets. And an elastic side panel having an elastic member 33 arranged in an extended state between the two non-extensible sheets is preferable. Here, the non-stretchable sheet means a sheet having an elongation recovery rate (%) of 20% or less measured by the "measurement method of elongation recovery rate", or a sheet that breaks before being 100% elongated.

The elongation recovery rate of the elastic sheet is measured by the following measuring method.
[Measurement method of elongation recovery rate]
Prepare a sample piece of elastic sheet with a length of 50 mm and a width of 25 mm, fix the sample piece at a chuck interval of K0 using a tensile tester (Orientec Co., Ltd. "Tencilon" RTC-1150A), and 300 mm / min. After stretching to the length K2 (K2 = K0 × 2) at the time of 100% stretching at the speed of, the length of the sample piece when the stress becomes 0 by starting to return at the same speed as the tensile speed is after stretching recovery. Length K1. The elongation recovery rate at 100% elongation is calculated from the following equation.
Elongation recovery rate at 100% elongation (%) = [(K2-K1) / (K2-K0)] × 100

The non-stretchable sheet may or may not have stretchability, but the maximum elongation is preferably 90% or less. In terms of extensibility, there are cases where the constituent fibers themselves are elongated, and even if the constituent fibers themselves are not elongated, the two fibers that have been heat-sealed at the intersections of the fibers are separated from each other, or the fibers are heat-sealed. It may be any case where the three-dimensional structure formed of a plurality of fibers is structurally changed due to the above, or the constituent fibers are torn off and the fiber layer as a whole is elongated.

As the non-stretchable sheet, a non-woven fabric, a laminated material of a non-woven fabric and a resin film, a porous film and the like are preferable. The non-stretchable sheet is preferably formed of a non-woven fabric made of thermoplastic fibers from the viewpoint of improving breathability and texture, and is formed of a water-repellent non-woven fabric from the viewpoint of preventing leakage of excrement. Is preferable

The thread-like elastic member 33 arranged on the elastic side panel 3 has a width (dimension in the Y direction) and a diameter of 0.1 mm or more and 2 mm from the viewpoint of improving the flexibility of the elastic side panel 3 and ensuring the elasticity. It is preferably 0.1 mm or more, and more preferably 1 mm or less. The number of thread-shaped elastic members 33 arranged on the elastic side panel 3 is preferably 1 or more and 25 or less, and more preferably 3 or more and 20 or less. Further, the elongation rate can be appropriately selected from conventionally known ones, and one thread-like elastic member 33 having a stress of 0.1 N or more and 1 N or less when stretched to 100% has an elongation rate of 50% or more and 300% or less. It is preferable that it is arranged and fixed in a state of being extended in the range of 100% or more, and it is more preferable that it is arranged and fixed in a state of being extended in the range of 100% or more and 250% or less. The elongation rate is the ratio of the length of the stretched and increased portion to the natural length. For example, when a length of 10 cm is stretched to 20 cm, the stretch rate is 100%.

The plurality of elastic members 33 in the stretched state are fixed between the inner surface side sheet 31 and the outer surface side sheet 32 via a plurality of adhesives (not shown) that intersect each elastic member 33 and extend in the Y direction. At the same time, the inner surface side sheet 31 and the outer surface side sheet 32 are directly bonded to each other via the adhesives (not shown) in the portion where the elastic member 33 does not intervene. It is preferable that the plurality of adhesives (not shown) intersect with all the thread-like elastic members 33 extending in the X direction and extend in the Y direction, and the total length of the elastic side panel 3 in the Y direction. It is more preferable that it extends over. A plurality of adhesives (not shown) are arranged at substantially equal intervals in the X direction. In the elastic side panel 3, a plurality of adhesives (not shown) are applied to either or both of the inner surface side sheet 31 and the outer surface side sheet 32 by various known methods, and after the coating, the sheets 31 are coated. , 32 are overlapped and pressed to fix a plurality of elastic members 33 in an extended state. As shown in FIG. 3, the elastic member 33 in the elastic side panel 3 formed in this way has an inward (closer to the absorbent body 2) fixed end 33I and an outer fixed end 33O in the X direction. The inner fixed end 33I and the outer fixed end 33O no longer have a contraction force and are in a non-expandable state. The length of the outer fixed end 33O in the X direction shall be in the range of 10% or more and 40% or less of the total length of the filamentous elastic member 33 in the X direction in the natural state of the elastic side panel 3 shown in FIG. Is preferable, and the range is more preferably 15% or more and 35% or less. The length of the inner fixed end 33I in the X direction is also the same as the length of the outer fixed end 33O in the X direction. In addition to fixing with an adhesive (not shown), the stretchable side panel 3 may be fused and fixed with a heat seal or the like.

The constituent materials of each constituent member of the diaper 1 sa will be described.
As 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 can be used without particular limitation.
For example, as the sheets 31 and 32 and the tape base material 42, a non-woven fabric, a woven fabric, a film, or a laminated sheet thereof or the like can be used.
As the surface sheet 21, the outer layer composite sheet 22, and the absorber 23 constituting the absorbent main body 2, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins may be used without particular limitation. it can. For example, as the surface sheet 21, a hydrophilic and liquid permeable non-woven fabric, a three-dimensional perforated film, or the like can be used. As the outer layer composite sheet 22, the leak-proof sheet 22a is a liquid-impermeable or impermeable (including water-repellent) resin film, and the outer layer non-woven fabric 22b is a non-woven fabric produced by various manufacturing methods (for example, air-through non-woven fabric, spunbonded non-woven fabric). , Spunlace non-woven fabric, needle punch non-woven fabric, etc.) can be used. The outer-layer non-woven fabric 22b may have a multi-layer structure. Further, the absorber 23 is made of a water-permeable thin paper or a non-woven fabric in which an aggregate of fibers such as pulp fibers (which may be a non-woven fabric) or an absorbent core in which particles of a water-absorbing polymer are held therein is formed. Those covered with a core wrap sheet or the like can be used. As the three-dimensional guard forming sheet 24 constituting the three-dimensional guard, a film, a non-woven fabric, a woven fabric, a laminated sheet thereof or the like can be used.

The elastic member 33, the elastic member 25 constituting the three-dimensional guard, and the leg elastic member 26 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene such as ethyl acrylate-ethylene. A filamentous or string-shaped elastic member made of an α-olefin copolymer or the like can be used. It is preferable that the plurality of elastic members 33 arranged on one side panel are of the same type and arranged at the same elongation rate from the viewpoint of manufacturing cost and simplification of the manufacturing process.
Preferred materials for the adhesive for joining the members, including the adhesive 34 for fixing the elastic member 33, include amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), and ethylene-acrylic acid ester. Polymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / Thermoplastic polymers such as propylene-styrene block copolymer (SEPS) and mixtures thereof and the like can be mentioned. The adhesive is preferably a hot melt type.

The scope of the invention is not limited to such embodiments. The present invention further discloses the following disposable diapers.

<1>
A disposable diaper comprising an absorbent body and an outer layer composite sheet arranged on the outer surface side of the absorbent body, and a side panel attached to one or both sides of the absorbent body.
The side panel has two sheets and an elastic member fixed between the two sheets, and a fastening tape is provided at the tip thereof.
The outer layer composite sheet has a liquid-impermeable or liquid-impermeable leak-proof sheet and an outer-layer non-woven fabric bonded to the outer surface side of the leak-proof sheet via an outer layer adhesive layer.
The side panel is joined to the outer layer composite sheet and the skin side sheet located on the inner surface side of the side panel via a connecting adhesive layer.
The connecting adhesive layer joins the side panel and the outer layer composite sheet on the outer side of the inner side edge of the side panel in the width direction of the disposable diaper, and the side panel. The outer layer composite sheet and the skin side sheet are bonded to each other on the inner side of the inner side edge of the above.
The outer layer adhesive layer is a disposable diaper having an intermittent portion in which no adhesive is arranged at a position overlapping the inner side edge of the side panel in the thickness direction of the disposable diaper.

<2>
The disposable diaper according to <1>, wherein the length W1 of the intermittent portion in the width direction is 1 mm or more, preferably 1.5 mm or more, 5 mm or less, preferably 3 mm or less.
<3>
When the intermittent portion is divided into an inner side portion and an outer side portion with the inner side edge line of the side panel as a boundary, the length W1a of the inner side portion in the width direction is 0. The disposable diaper according to <1> or <2> above, which is 5 mm or more, preferably 1 mm or more, 5 mm or less, preferably 3 mm or less.
<4>
When the intermittent portion is divided into an inner side portion and an outer side portion with the inner side edge line of the side panel as a boundary, the length W1b of the outer side portion in the width direction is 0. The disposable diaper according to any one of <1> to <3> above, which is 5 mm or more, preferably 1 mm or more, 5 mm or less, preferably 3 mm or less.

<5>
In the outer layer adhesive layer, in the region overlapping the inner side edge of the side panel and its vicinity in the thickness direction, a portion where the adhesive is arranged and a portion where the adhesive is not arranged are repeatedly arranged in the width direction. The above <1> to <4, which have a striped coating portion, one of the portions where the adhesive is not arranged, which is located between the portions where the adhesive is arranged, constitutes the intermittent portion. > The disposable diaper according to any one of 1.
<6>
The length W2 of the portion where the adhesive is arranged in the width direction is 0.5 mm or more, preferably 1 mm or more, and 3 mm or less, preferably 2 mm or less. The disposable diaper according to any one.
<7>
The length W2 of the portion where the adhesive is arranged in the width direction is 20% or more, preferably 30% or more, and 100% with respect to the length W3 of the portion where the adhesive is not arranged. The disposable diaper according to any one of <1> to <6>, which is preferably 80% or less.
<8>
The length W3 of the portion where the adhesive is not arranged in the width direction is 1 mm or more, preferably 1.5 mm or more, and 5 mm or less, preferably 3 mm or less. The disposable diaper according to any one of.

<9>
On the outer side of the inner side edge of the side panel, the outer layer composite sheet has a shear strength in the width direction between the leak-proof sheet and the outer layer non-woven fabric, and the tensile strength of the leak-proof sheet in the width direction. The disposable diaper according to any one of <1> to <8>, which is larger than the strength.
<10>
The disposable diaper according to any one of <1> to <9>, wherein the outer-layer non-woven fabric has a higher tensile strength in the width direction than the leak-proof sheet.
<11>
The tensile strength of the leak-proof sheet in the width direction is 100 cN / 25 mm or more, preferably 150 cN / 25 mm or more, and 400 cN / 25 mm or less, preferably 300 cN / 25 mm or less. The disposable diaper according to any one of.
<12>
The tensile strength of the outer layered nonwoven fabric in the width direction is 300 cN / 25 mm or more, preferably 400 cN / 25 mm or more, and 1000 cN / 25 mm or less, preferably 800 cN / 25 mm or less. The disposable diaper according to any one.

<13>
In the width direction, the outer edge of the leak-proof sheet is located on the outer side of the inner side edge of the side panel and on the inner side of the outer side edge of the outer layered nonwoven fabric. Ori,
In the side panel, the inner end portion of the side panel extends from the outer side edge of the leak-proof sheet in the outer layer non-woven fabric in the width direction via the extending portion and the connecting adhesive layer. The disposable diaper according to any one of <1> to <12>, which is joined.
<14>
The disposable diaper according to <13>, wherein the length W5 of the extending portion of the outer layered nonwoven fabric in the width direction is 5 mm or more, preferably 10 mm or more, and 30 mm or less, preferably 20 mm or less.
<15>
The connecting adhesive layer has an extended adhesive portion for joining the inner end portion of the side panel and the extended portion of the outer layer non-woven fabric.
The length W6 of the extended adhesive portion in the connecting adhesive layer is 30% or more, preferably 60% or more, and 100% or less with respect to the length W5 of the extended portion of the outer layer non-woven fabric. The disposable diaper according to <13> or <14>, which is preferably 90% or less.
<16>
The connecting adhesive layer has an extended adhesive portion for joining the inner end portion of the side panel and the extended portion of the outer layer non-woven fabric.
Any of the above <13> to <15>, the length W6 of the extended adhesive portion in the connecting adhesive layer is 3 mm or more, preferably 5 mm or more, and 20 mm or less, preferably 10 mm or less. The disposable diaper according to 1.

<17>
Any of the above <1> to <5>, the connecting adhesive layer has an intermittent portion in which no adhesive is arranged at a position overlapping the inner side edge of the side panel in the thickness direction. The disposable diaper described in 1 or 1.
<18>
The length W4 of the intermittent portion of the connecting adhesive layer in the width direction is 1 mm or more, preferably 1.5 mm or more, and 5 mm or less, preferably 3 mm or less, according to the above <17>. Disposable diapers.
<19>
When the intermittent portion of the connecting adhesive layer is divided into an inner side portion and an outer side portion with the inner side edge of the side panel as a boundary, the length of the inner side portion in the width direction. The disposable diaper according to <17> or <18>, wherein the W4a is 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 3 mm or less.
<20>
When the intermittent portion of the connecting adhesive layer is divided into an inner side portion and an outer side portion with the inner side edge of the side panel as a boundary, the length W4b of the outer side portion is 0. 5. The disposable diaper according to any one of <17> to <19>, which is 5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 3 mm or less.
<21>
The length W4 in the width direction of the intermittent portion of the connecting adhesive layer is the same as the length W1 in the width direction of the intermittent portion of the outer layer adhesive layer. The disposable diaper according to any one of.

<22>
The side panels are stretchable side panels having two non-stretchable sheets and the elastic member arranged in an stretched state between the two non-stretchable sheets. > The disposable diaper according to any one of 1.
<23>
The elastic member arranged on the side panel is thread-like and has a thread shape.
The disposable diaper according to any one of <1> to <22>, wherein the thread-like elastic member has a width and a diameter of 0.1 mm or more and 2 mm or less, preferably 0.1 mm or more and 1 mm or less.
<24>
The elastic member arranged on the side panel is thread-like and has a thread shape.
The disposable item according to any one of <1> to <23>, wherein the number of the thread-like elastic members arranged on the side panel is about 1 or more and 25 or less, preferably 3 or more and 20 or less. Diapers.
<25>
The disposable diaper according to any one of <1> to <24>, wherein the elastic member arranged on the side panel is arranged along the width direction of the disposable diaper.
<26>
A plurality of the elastic members are arranged on the side panel.
The disposable diaper according to any one of <1> to <25>, wherein the plurality of elastic members in the side panel are arranged at substantially equal intervals in the longitudinal direction of the disposable diaper.

<27>
In the side panel, the two sheets constituting the side panel are joined via a plurality of adhesive layers.
The disposable diaper according to any one of <1> to <26>, wherein the plurality of adhesive layers are all formed so as to extend in the longitudinal direction of the disposable diaper.
<28>
In the plurality of adhesive layers, the plurality of the elastic members are fixed in an extended state between the two sheets via the adhesive constituting each adhesive layer, and the elastic members are interposed. The disposable diaper according to <27>, wherein the two sheets are directly bonded to each other via an adhesive constituting each adhesive layer at a portion not provided.
<29>
The plurality of the adhesive layers are the main body side adhesive layer provided on the absorbent main body side in the extending direction of the side panel and the tip end side provided on the tip end side in the extending direction of the side panel. It has an adhesive layer and a plurality of intermediate adhesive layers provided in an intermediate region which is a region between the main body side adhesive layer and the tip end side adhesive layer in the extending direction of the side panel. And
The width of the intermediate adhesive layer is smaller than that of either the main body side adhesive layer or the tip end side adhesive layer, and a plurality of the intermediate adhesive layers are intermittently formed in the intermediate region. > The disposable diaper described in.
<30>
Of the two sheets constituting the side panel, reinforcing adhesive layers are formed at both ends of the sheet located on the outer surface side of the side panel in the width direction. <1> The disposable diaper according to any one of ~ <29>.

<31>
Of the two sheets constituting the side panel, the sheet located on the inner surface side of the side panel is not folded back on either the outer surface side or the inner surface side of the sheet. > The disposable diaper according to any one of 1.
<32>
Of the two sheets constituting the side panel, a sheet located on the outer surface side of the side panel is folded back toward the inner surface side of the sheet at both ends of the side panel, and the folded portion thereof. However, the disposable diaper according to any one of <1> to <30>, which is bonded to the inner surface of the sheet via a reinforcing adhesive layer.
<33>
The reinforcing adhesive layers formed at both ends of the two sheets constituting the side panel in the width direction are formed on the inner surface side of the sheet located on the outer surface side of the side panel. The disposable diaper according to any one of <30> to <32>, which is formed.

<34>
3. The one according to any one of <30> to <33>, wherein the reinforcing adhesive layer is continuous with the adhesive layer joining the two sheets constituting the side panel. Disposable diapers.
<35>
The skin side sheet has a surface sheet and a pair of three-dimensional guard forming sheets arranged on the inner surface side in a state where a part thereof is overlapped on both side portions in the longitudinal direction of the surface sheet.
The connecting adhesive layer is arranged on the outer side and the inner side of the inner side edge of the side panel, and the inner end portion of the side panel and the leakage-proof sheet are arranged on the outer side. Any one of <1> to <34>, which is bonded between the leak-proof sheet and the three-dimensional guard forming sheet or the surface sheet on the inner side. Disposable diapers listed in.
The expression "bonding between the leak-proof sheet and the three-dimensional guard forming sheet or the surface sheet" refers to the space between the leak-proof sheet and the three-dimensional guard forming sheet and the leak-proof sheet. In addition to the case where either one of the surface sheet and the surface sheet is joined, both the leak-proof sheet and the three-dimensional guard forming sheet and between the leak-proof sheet and the surface sheet are joined. Including the case where it is.
<36>
The connecting adhesive layer is separated from the adhesive layer that joins the sheet located on the inner surface side of the side panel and the three-dimensional guard forming sheet among the two sheets constituting the side panel. The disposable diaper according to <35> above.

According to the present invention, when a diaper is attached by pulling a fastening tape or the like provided at the tip of a side panel, a disposable diaper is provided so that the outer layer composite sheet arranged on the outer surface side of the absorbent body is less likely to be torn or torn. Can be provided.

Claims (15)

A disposable diaper comprising an absorbent body and an outer layer composite sheet arranged on the outer surface side of the absorbent body, and a side panel attached to one or both sides of the absorbent body.
The side panel has two sheets and an elastic member fixed between the two sheets, and a fastening tape is provided at the tip thereof.
The outer layer composite sheet has a liquid-impermeable or liquid-impermeable leak-proof sheet and an outer-layer non-woven fabric bonded to the outer surface side of the leak-proof sheet via an outer layer adhesive layer.
The side panel is joined to the outer layer composite sheet and the skin side sheet located on the inner surface side of the side panel via a connecting adhesive layer.
The connecting adhesive layer joins the side panel and the outer layer composite sheet on the outer side of the inner side edge of the side panel in the width direction of the disposable diaper, and the side panel. The outer layer composite sheet and the skin side sheet are bonded to each other on the inner side of the inner side edge of the above.
The outer layer adhesive layer is a disposable diaper having an intermittent portion in which no adhesive is arranged at a position overlapping the inner side edge of the side panel in the thickness direction of the disposable diaper. In the outer layer adhesive layer, in the region overlapping the inner side edge of the side panel and its vicinity in the thickness direction, a portion where the adhesive is arranged and a portion where the adhesive is not arranged are repeatedly arranged in the width direction. The disposable portion according to claim 1, wherein one of the portions where the adhesive is not arranged, which is located between the portions where the adhesive is arranged, has a striped coating portion which constitutes the intermittent portion. Diapers. On the outer side of the inner side edge of the side panel, the outer layer composite sheet has a shear strength in the width direction between the leak-proof sheet and the outer-layer non-woven fabric, and the tensile strength of the leak-proof sheet in the width direction. The disposable diaper according to claim 1 or 2, which is greater than the strength. The disposable diaper according to any one of claims 1 to 3, wherein the outer-layer non-woven fabric has a higher tensile strength in the width direction than the leak-proof sheet. In the width direction, the outer side edges of the leak-barrier sheet is, on the outside than the inner side edge of the side panel, and located in the inner side than the outer side edge of the outer layer nonwoven fabric ,
In the side panel, the inner end portion of the side panel extends from the outer side edge of the leak-proof sheet in the outer layer non-woven fabric in the width direction via the extending portion and the connecting adhesive layer. The disposable diaper according to any one of claims 1 to 4, which is joined. Any one of claims 1 to 5, wherein the connecting adhesive layer has an intermittent portion to which no adhesive is arranged at a position overlapping the inner side edge of the side panel in the thickness direction. Disposable diapers listed in. The side panel is any of claims 1 to 6, wherein the side panel is an elastic side panel having two non-extensible sheets and the elastic member arranged in an stretched state between the two non-extensible sheets. The disposable diaper described in item 1. In the side panel, the two sheets constituting the side panel are joined via a plurality of adhesive layers.
The disposable diaper according to any one of claims 1 to 7, wherein the plurality of adhesive layers are all formed so as to extend in the longitudinal direction of the disposable diaper. In the plurality of adhesive layers, the plurality of the elastic members are fixed in an extended state between the two sheets via the adhesives constituting the plurality of adhesive layers, and the elastic members are formed. The disposable diaper according to claim 8, wherein the two sheets are directly bonded to each other via an adhesive constituting each of the plurality of the adhesive layers at a portion where the adhesive is not interposed. The plurality of the adhesive layers are the main body side adhesive layer provided on the absorbent main body side in the extending direction of the side panel and the tip end side provided on the tip end side in the extending direction of the side panel. It has an adhesive layer and a plurality of intermediate adhesive layers provided in an intermediate region which is a region between the main body side adhesive layer and the tip end side adhesive layer in the extending direction of the side panel. And
The intermediate adhesive layer has a width smaller than any of the main body side adhesive layer and the tip end side adhesive layer, and a plurality of the intermediate adhesive layers are intermittently formed in the intermediate region, according to claim 8 or 9. The listed disposable diapers. Claims 1 to 1, wherein reinforcing adhesive layers are formed at both ends of the two sheets constituting the side panel in the width direction of the sheets located on the outer surface side of the side panel. The disposable diaper according to any one of 10. The two sheets constituting the side panel, the sheet located on the inner surface side of the side panel is not folded back on either the outer surface side or the inner surface side of the sheet located on the inner surface side. The disposable diaper according to any one of 1 to 11. Of the two sheets constituting the side panel, the sheets located on the outer surface side of the side panel are folded back to the inner surface side of the sheets located on the outer surface side at both ends of the side panel. The disposable diaper according to any one of claims 1 to 11, wherein the folded portions are joined to the inner surface of the sheet via a reinforcing adhesive layer. The skin side sheet has a surface sheet and a pair of three-dimensional guard forming sheets arranged on the inner surface side in a state where a part thereof is overlapped on both side portions in the longitudinal direction of the surface sheet.
The connecting adhesive layer is arranged on the outer side and the inner side of the inner side edge of the side panel, and the inner end portion of the side panel and the leakage-proof sheet are arranged on the outer side. The invention according to any one of claims 1 to 13, wherein the leak-proof sheet and the three-dimensional guard forming sheet or the surface sheet are bonded to each other on the inner side. Disposable diapers. The connecting adhesive layer is separated from the adhesive layer that joins the sheet located on the inner surface side of the side panel and the three-dimensional guard forming sheet among the two sheets constituting the side panel. The disposable diaper according to claim 14.

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