JP6391208B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper that is attached to a wearer's crotch and absorbs and holds a liquid such as urine. More specifically, the present invention relates to a disposable diaper of a type in which an absorbent main body is crosslinked between a front body exterior body and a back body exterior body.

  Conventionally, a disposable diaper including a top sheet, a back sheet, and an absorbent body interposed between these sheets is known. In a general disposable diaper, the absorber is covered with a top sheet made of a liquid permeable material from the surface side in contact with the wearer's skin, and formed from a liquid impermeable material from the opposite back side. It is covered with. For this reason, for example, body fluid excreted by the wearer passes through the top sheet and is absorbed by the absorbent body, and leakage to the outside is prevented by the back sheet.

  Further, as a disposable diaper having the above configuration, an absorbent main body, and a front body exterior body and a rear body exterior body for holding the absorbent body around the waist of the wearer are individually formed. Disposable diapers (so-called cross-linked disposable diapers) are known (for example, Patent Document 1). In the cross-linked disposable diaper, one end side in the length direction of the absorbent main body is fixed to the front body exterior body, and the other end side in the length direction of the absorbent main body is fixed to the rear body exterior body. For this reason, an absorptive main body becomes a structure bridge | crosslinked between a front body exterior body and a back body exterior body. And a pants-type disposable diaper is formed by fixing the both-sides edge part of a front body exterior body and a back body exterior body in the state in which the absorptive main body was bridge | crosslinked. The wearer can wear the disposable diaper formed in a pants shape by inserting both legs. In addition, the cross-linked disposable diaper has a wide opening around the legs, so that the wearer can move both legs relatively freely even when the disposable diaper is worn. There is.

JP 2010-233733 A

  By the way, it is generally preferable to arrange a plurality of elastic stretch members along the length direction of the absorbent main body on the left and right sides of the absorbent main body fixed to the front body exterior body and the rear body exterior body. It is said that. This elastic elastic member is disposed on the absorbent main body, for example, for the purpose of forming a pair of three-dimensional gathers for improving the adhesion around the legs of the wearer or preventing liquid such as urine from leaking out. Is. For example, the elastic stretchable member is joined in a stretched state between a plurality of sheets forming the absorbent main body, and when the elastic stretchable member contracts, the contracted force is used to join the elastic stretchable member to the sheet. Stands up in the direction of contact with the wearer's skin. For this reason, by arranging a plurality of elastic elastic members on the absorbent main body, it is possible to increase the adhesion between the absorbent main body and the wearer's skin, thereby preventing urine leakage and improving the wearing feeling.

  Here, in the case of the above-mentioned cross-linked disposable diaper, if the entire one end side of the absorbent main body is fixed to the front body exterior body and the other end side is fixed to the rear body exterior body, an elastic elastic member The absorptive main body is fixed to the front body exterior body and the back body exterior body, including the region where there is. This elastic expansion and contraction member exhibits the effect of improving adhesion and preventing urine leakage for the first time by allowing the sheet material of the absorbent main body to stand up in the direction in contact with the wearer's skin due to its contraction force. However, when the absorbent main body is fixed to the front body exterior body and the rear body exterior body including the region where the elastic stretch member exists, the elastic stretch member erects the sheet material of the absorbent body at the fixed location. The above-described effects of improving adhesion and preventing urine leakage cannot be effectively exhibited.

  On the other hand, in order not to impede the adhesion improvement effect by the elastic elastic member of the absorbent main body, only the center part in the width direction of the absorbent main body is joined to the front body exterior body and the back body exterior body. It is also possible. However, in a cross-linked disposable diaper, if the absorbent main body and the front body exterior body are not sufficiently fixed, or if the absorbent main body and the rear body exterior body are not sufficiently fixed, the absorbent body will absorb the diaper. Misalignment and twisting may occur in the sex body, which may lead to urine leakage and decreased wearing feeling. Therefore, it is also important for the cross-linked disposable diaper to properly fix the absorbent main body to the front body exterior body and the back body exterior body.

  Therefore, at present, it is possible to stably fix the absorbent main body to the front body exterior body and the rear body exterior body without impairing the function of the elastic elastic members disposed on both sides of the absorbent body. There is a need for disposable diapers that can be used.

Therefore, the inventors of the present invention, as a result of intensive studies on means for solving the problems of the above-described conventional invention, are disposable diapers of a type in which an absorbent main body is attached to a front body exterior body and a back body exterior body. In the both end regions in the length direction of the absorbent body, the absorbent body is joined to the front body exterior body and the back body exterior body over the entire width direction, thereby stabilizing the joined state of the absorbent body, On the other hand, in the region where elastic elastic members arranged on both sides of the absorbent main body exist, the function of the elastic elastic member can be achieved by partially separating the absorbent main body from the front body exterior body and the rear body exterior body. The knowledge that it can be exhibited effectively was obtained. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
More specifically, the present invention has the following configuration.

The present invention relates to a disposable diaper.
The disposable diaper of the present invention includes a front body exterior body 1, a back body exterior body 2, and an absorbent main body 3. The front body side of the absorbent main body 3 is fixed to the front body exterior body 1, and the rear body side of the absorbent main body 3 is fixed to the rear body exterior body 2. Further, a crotch region is located between the front body side and the back body side of the absorbent main body 3, and in this crotch region, the absorbent main body 3 is located on either the front body exterior body 1 or the back body exterior body 2. Also not fixed.
Moreover, the absorptive main body 3 has a plurality of elastic elastic members 4 disposed on both left and right sides in the width direction.
The plurality of elastic elastic members 4 are arranged along the length direction of the absorbent main body 3 so as not to reach at least the both end regions 51 in the length direction of the absorbent main body 3.
Here, the absorbent main body 3 is joined to the front body exterior body 1 and the rear body exterior body 2 over the entire width direction in both end regions 51 in the length direction.
Furthermore, the absorptive main body 3 has a stretchable region 52 extending from the location where the plurality of elastic stretchable members 4 overlap the front body exterior body 1 and the back body exterior body 2 in the width direction.
The stretchable region 52 is divided into an outer region 52a positioned on the left and right outer sides in the width direction and an inner region 52b positioned on the inner side in the width direction than the outer region 52a.
The outer region 52 a is a region where at least the outer elastic stretch member 4 a located at the outermost side in the width direction of the absorbent main body 3 among the plurality of elastic stretch members 4 is disposed. In the outer region 52a, the absorbent main body 3 is not joined to the front body exterior body 1 and the back body exterior body 2, but is separated.
On the other hand, the absorbent main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 in the inner region 52b located on the inner side in the width direction than the outer region 52a.

As in the above configuration, first, the absorbent main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 entirely in both end regions 51 located at both ends in the length direction. Thus, the joining state of an absorptive main body can be stabilized by fixing the both ends of the absorptive main body 3 to the front body exterior body 1 and the back body exterior body 2 firmly. Therefore, for example, in a state where the wearer wears a diaper, it is possible to prevent positional deviation or twisting from occurring in the absorbent main body 3.
Further, in the present invention, the absorbent main body 3 is separated from the front body exterior body 1 and the back body exterior body 2 in the outer regions 52a located at the left and right sides of the absorbent body 3 where at least the outer elastic elastic member 4a is disposed. Separate. For this reason, at least the outer elastic elastic member 4a contracts without being affected by the fixation of the absorbent main body 3 and the front body exterior body or the fixation of the absorbent main body 3 and the rear body exterior body 2. Therefore, the absorptive main body 3 can stand up in the direction where the outer elastic elastic member 4a is in contact with the wearer's skin by using the contraction force of the outer elastic elastic member 4a. Therefore, this invention can improve the adhesiveness of the absorptive main body 3 and a wearer's skin, and can exhibit the effect of urine leakage prevention and the improvement of a feeling of wear appropriately.
As described above, according to the present invention, the function of the elastic elastic member can be sufficiently exerted while preventing the displacement and twisting of the absorbent main body 3, so that the feeling of use and wearing of the entire disposable diaper is improved. improves.

In the present invention, the absorbent main body 3 preferably has an intermediate region 53 between the both end regions 51 and the stretchable region 52.
In the intermediate region 53, the absorbent main body 3 is narrower than the both end regions 51 and wider than the inner region 52 b of the stretchable region 52, with respect to the front body exterior body 1 and the back body exterior body 2. It is preferable that it is joined.
The junction width in the intermediate region 53 may be constant, may be gradually reduced from the both end regions 51 toward the stretchable region 52, or may be gradually reduced steplessly. There may be.

By providing the intermediate region 53 between the both end regions 51 and the stretchable region 52 as in the above configuration, the fixed state of the absorbent main body 3 with respect to the front body exterior body 1 and the back body exterior body 2 can be further stabilized. it can. That is, in the present invention, a difference occurs between the joining width of the both end regions 51 and the joining width of the inner region 52b in the stretchable region 52. However, when the difference in the joining width is large, for example, when the load is applied to the absorbent main body 3 such as when the wearer exercises while wearing a diaper, the joint of the both end regions 51 of the absorbent main body 3 is performed. Becomes easy to peel. In this respect, the present invention can improve the bonding strength of the entire absorbent main body 3 by providing an intermediate region 53 between the both end regions 51 and the stretchable region 52 to reduce the difference in bonding width in each region. This makes it possible to stabilize the fixed state.
Further, if the difference between the joining width of the both end regions 51 and the joining width of the inner region 52b in the stretchable region 52 is large, wrinkles are formed in the exterior body at the location where the difference occurs, and the appearance and the feeling of touch are deteriorated. In this regard, in the present invention, by providing an intermediate region 53 between the both end regions 51 and the stretchable region 52 to reduce the difference in bonding width in each region, the absorbent main body 3 becomes smooth and worn. An improvement in feeling can be achieved.

Moreover, in this invention, the front body exterior body 1 and the back body exterior body 2 have a pair of side seal parts 11 and 21 joined in the state which overlap | superposed the left and right both sides corresponding to each other.
And the front body exterior body 1 and the back body exterior body 2 are the 1st area | regions 12 and 22 covering the width direction of a diaper from the location in which a pair of side seal parts 11 and 21 were formed, 1st area | region 12, It is good also as being formed by the 2nd area | regions 13 and 23 extended from 22 to the direction where the crotch area of an absorptive main body exists.
In this case, the second regions 13 and 23 preferably have a shape in which the width in the width direction of the diaper is narrower than that of the first regions 12 and 22 and gradually becomes narrower toward the crotch region.
And the absorptive main body 3 has the front body exterior body 1 and the back body exterior such that the stretchable region 52 is located in a region including the second regions 13 and 23 of the front body exterior body 1 and the back body exterior body 2. It is preferable to be joined to the body 2.

  As in the above configuration, the second regions 13 and 23 of the front body exterior body 1 and the back body exterior body 2 are regions where the side seal portions 11 and 21 do not exist on the outer side in the width direction. Have become free. For this reason, it arrange | positions in the expansion-contraction area | region 52 by fixing so that the expansion-contraction area | region 52 of the absorptive main body 3 may be located in the area | region containing the 2nd area | regions 13 and 23 of the front body exterior body 1 and the back body exterior body 2. The plurality of elastic elastic members 4 that are made easy to stretch or contract, can enhance the adhesion between the absorbent main body 3 and the wearer's skin, and can appropriately exhibit effects such as prevention of urine leakage and improvement of wearing feeling. .

  In the present invention, the absorbent main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 in the entire end regions 51 located at both ends in the longitudinal direction thereof. Both end portions of the main body 3 can be firmly fixed. Thereby, the joining state of the absorptive main body 3 with respect to the front body exterior body 1 and the back body exterior body 2 is stabilized, and it can prevent that a position shift and a twist generate | occur | produce in the absorptive main body 3.

  Furthermore, in the present invention, the outer absorbent body 3 is separated from the front body exterior body 1 and the rear body exterior body 2 in the outer regions 52a located at the left and right sides of the absorbent body 3 where at least the outer elastic elastic member 4a is disposed. In order to separate them, at least the outer elastic stretchable member 4a can be contracted without being affected by fixing to the front body exterior body 1 and the back body exterior body 2. Accordingly, the absorbent main body 3 functions to stand up in the direction of contact with the wearer's skin by utilizing the contraction force of the outer elastic elastic member 4a, thereby improving the wearer's skin adhesion and urine leakage. Prevention and improvement of wearing feeling can be achieved.

  Therefore, according to the present invention, the absorbent main body can be stably fixed to the front body exterior body and the rear body exterior body without impairing the functions of the elastic elastic members disposed on both sides of the absorbent body. Disposable diapers can be provided.

FIG. 1 is a perspective view showing an example of a disposable diaper according to the present invention. FIG. 2 is a development view showing an example of a disposable diaper according to the present invention. 3 is a cross-sectional view taken along line XX in FIG. FIG. 4 is a developed view showing an example of the disposable diaper according to the present invention, and the joining portion of the absorbent main body to the front body exterior body and the back body exterior body is shown by hatching. FIG. 5 is a cross-sectional view of the disposable diaper shown in FIG. 5A shows a cross-sectional shape taken along line X1-X1 in FIG. 4, FIG. 5B shows a cross-sectional shape taken along line X2-X2 in FIG. 4, and FIG. The cross-sectional shape in the X3-X3 line is shown.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
Here, in the present specification, “A to B” means “A or more and B or less”.
In the present specification, the “length direction” of a disposable diaper or an absorbent main body basically means the direction connecting the front body side and the back body side (vertical direction in FIG. 2), and “width” The term “direction” basically means a direction (left-right direction in FIG. 2) orthogonal to the longitudinal direction.

(1. Overall configuration of disposable diapers)
FIG. 1 is a schematic diagram showing an example of a disposable diaper 100, and shows a state where the disposable diaper 100 is viewed from the front body exterior body 1 side. FIG. 2 is a development view of the disposable diaper 100 shown in FIG. 1 and shows the disposable diaper 100 as viewed from the top sheet 32 side of the absorbent main body 3. In FIG. 2, various sheet materials constituting the disposable diaper are transparently drawn in order to show the positional relationship of the elastic members arranged at various places.

  As shown in FIGS. 1 and 2, the disposable diaper 100 includes a front body exterior body 1, a rear body exterior body 2, and an absorbent main body 3. The front body exterior body 1 contacts the abdomen of the wearer when worn, and the rear body exterior body 2 contacts the back of the wearer when worn. The absorbent main body 3 has one end side in the length direction fixed to the front body exterior body 1 and the other end side fixed to the rear body exterior body 2. For this reason, in this invention, the absorptive main body 3 is in the state bridge | crosslinked between the front body exterior body 1 and the back body exterior body 2. FIG. As a means for fixing the absorbent main body 3 to the front body exterior body 1 and the back body exterior body 2, a known method can be used, for example, fixing using a hot melt adhesive or other fluid adhesive. It may be fixed to the method, or may be fixed by heat welding such as heat sealing or ultrasonic welding.

  Further, the front body exterior body 1 and the back body exterior body 2 are joined to each other at the side seal portions 11 located on both side edges in the width direction, so that the front body exterior body 1 and the back body exterior body 2 are connected in a ring shape. Yes. For this reason, as shown in FIG. 1, a waist circumference opening 5 located around the wearer's waist when worn and a leg circumference opening 6 located around the wearer's leg when worn. In this way, a crosslinked disposable diaper 100 is formed. The wearer puts both legs into the waist opening 5 so that the abdomen is in contact with the front body exterior body 1 and the back is in contact with the back body exterior body 2, and the respective legs are placed around the legs. By taking out from the opening part 6, the bridge | crosslinking type disposable diaper 100 can be mounted | worn.

(2. Components of disposable diapers)
Hereinafter, the configuration of each specific part of the disposable diaper 100 of the present invention will be specifically described with reference to the drawings.

(2-1. Front body exterior body and back body exterior body)
The front body exterior body 1 and the back body exterior body 2 are in contact with the wearer's abdomen and back, and absorbable between the front body exterior body 1 and the back body exterior body 2 when the disposable diaper 100 is worn. It is a member for suspending the main body 3.

  The front body exterior body 1 and the back body exterior body 2 have a pair of side seal parts 11 and 21 at the left and right side edges in the width direction of the diaper. The front body exterior body 1 and the back body exterior body 2 are joined at a pair of side seal portions 11 and 21 with the right and left side edges in the width direction of the diaper being overlapped with each other. The pair of side seal portions 11 and 21 extend in the length direction of the diaper and are linearly formed. In the side seal portions 11, 21, the front body exterior body 1 and the back body exterior body 2 are joined by a known joining means such as hot emboss welding or ultrasonic emboss welding.

  Further, in the front body exterior body 1 and the back body exterior body 2, regions extending in the diaper width direction from the locations where the pair of side seal portions 11 and 21 exist are the first regions 12 and 22. As shown in FIG. 2, the first regions 12 and 22 are formed in a substantially rectangular shape. In the front body exterior body 1 and the back body exterior body 2, second regions 13 and 23 extend from the first regions 12 and 22 toward the crotch region 3 a of the diaper. The second regions 13 and 23 are regions where the side seal portions 11 and 21 are not formed on both sides of the diaper in the width direction. As shown in FIG. 2, in the width direction of the diaper, the widths of the second regions 13 and 23 are gradually narrower toward the crotch region 3a of the diaper than the first regions 12 and 22. It has become.

Specifically, in the developed view shown in FIG. 2, the front body exterior body 1 includes a long side 1 a that is a side that becomes a waist circumference end, and a pair of both sides on which a pair of side seal portions 11 are formed. 1b, a short side 1c that is formed substantially parallel to the long side 1a and to which the absorbent main body 3 is fixed, and a pair of oblique sides 1d that connect the pair of both sides 1b and the short side 1c. . In this case, when one end of the pair of both sides 1b is connected by the long side 1a and the other end of the pair of both sides 1b is connected by an imaginary line, a substantially rectangular region defined is a front body. This becomes the first region 12 of the exterior body 1. On the other hand, when one end of the pair of hypotenuses 1d is connected by the short side 1c and the other end of the pair of hypotenuses 1d is connected by an imaginary line, the substantially trapezoidal region defined is the front body exterior body 1 This becomes the second region 13.
Similarly, the rear body exterior body 2 is formed so as to be substantially parallel to the long side 2a, which is the side that becomes the waist end, the pair of side sides 2b on which the pair of side seal portions 21 are formed, and the long side 2a. In addition, the shape has a short side 2c that is a side to which the absorbent main body 3 is fixed, and a pair of oblique sides 2d that connect the pair of both sides 2b and the short side 2c. In this case, when one end of the pair of both sides 2b is connected by the long side 2a and the other end of the pair of both sides 2b is connected by an imaginary line, the substantially rectangular region defined is the rear body This becomes the first region 22 of the exterior body 2. On the other hand, when one end of the pair of hypotenuses 2d is connected by the short side 2c and the other end of the pair of hypotenuses 2d is connected by an imaginary line, the substantially trapezoidal region defined is the rear body exterior body 2 This becomes the second region 23.
However, as shown in FIG. 2, in the front body exterior body 1, the inclination of the pair of oblique sides 1 d is gentler than the inclination of the pair of oblique sides 2 d in the rear body exterior body 2. For this reason, even when the front body exterior body 1 and the back body exterior body 2 are joined, the opening 6 around the leg portion is relatively wide on the front body exterior body 1 side, and the wearer's Legs are easy to move.

(2-1-1. Inner sheet and outer sheet)
The front body exterior body 1 and the back body exterior body 2 are configured by, for example, superposing inner sheets 14 and 24 and outer sheets 15 and 25. The inner sheets 14 and 24 are arranged on the surface (skin contact surface) side in contact with the wearer's skin, and the outer sheets 15 and 25 are arranged on the surface (skin non-contact surface) side not in contact with the wearer's skin. Is done. The inner sheets 14 and 24 and the outer sheets 15 and 25 may be separately formed sheet materials. For example, one sheet material is folded at a position corresponding to the edge of the waist opening of the disposable diaper. It may be formed integrally. The inner sheets 14 and 24 and the outer sheets 15 and 25 are formed of, for example, a flexible fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof. The inner sheets 14 and 24 and the outer sheets 15 and 25 are bonded by, for example, a hot melt adhesive. Further, between the inner sheets 14 and 24 and the outer sheets 15 and 25, a plurality of tammy stretchable members 16 and 26 and a plurality of waist stretchable members 17 and 27 are extended along the width direction of the disposable diaper. It is fixed.

(2-1-2. Tammy elastic member and waist elastic member)
The tammy stretchable members 16, 26 are arranged in a stretched state over the width direction of the front body exterior body 1 and the back body exterior body 2, and are members for forming a tammy gather around the waist of the disposable diaper by contracting. It is. As shown in FIG. 2, the front body exterior body 1 and the back body exterior body 2 are provided with a plurality of tammy expansion members 16 and 26 along the width direction of the disposable diaper. The plurality of tammy elastic members 16 and 26 are disposed in a region around the waist where the absorbent main body 3 is disposed, of the front body exterior body 1 and the back body exterior body 2. Further, the plurality of Tammy elastic members 16 and 26 are fixed in an extended state between the inner sheets 14 and 24 and the outer sheets 15 and 25 constituting the front body exterior body 1 and the rear body exterior body 2, and contract. Thus, Tammy gathers are formed in the area around the waist of the front body exterior body 1 and the back body exterior body 2. It is preferable that the number of the plurality of Tammy elastic members 16 and 26 is, for example, 10 to 30, 12 to 28, 15 to 25. Moreover, it is preferable that the plurality of tammy expansion members 16 and 26 are formed in a straight line over substantially the entire width of the front body exterior body 1 and the back body exterior body 2. Are preferably arranged substantially in parallel.

  As shown in FIG. 2, when the disposable diaper is viewed from the surface (skin contact surface) side that comes into contact with the wearer's skin, a part of the plurality of Tammy elastic members 16, 26 overlap with the absorbent main body 3. Are arranged. Among the plurality of Tammy elastic members 16 and 26, those overlapping with the absorbent body 31 of the absorbent main body 3 are partially intermittent at the center in the width direction of the front body exterior body 1 and the back body exterior body 2. Is formed. That is, among the plurality of Tammy elastic members 16, 26, those that overlap with the absorbent body 31 of the absorbent main body 3 are arranged only on both sides in the width direction of the front body exterior body 1 and the back body exterior body 2. Here, the portions overlapping the absorbent body 31 of the absorbent main body 3 are not completely intermittent in the Tammy elastic members 16 and 26, and the Tammy elastic members 16 and 26 are partially absorbed by the absorbent main body 3. It is preferable to partially overlap the body 31.

  The waist elastic members 17 and 27 are arranged along the edge of the abdominal opening 5 of the front body exterior body 1 and the back body exterior body 2 and contracted to be near the abdominal opening 5 of the disposable diaper. , A member for forming a waist gather. The plurality of waist elastic members 17 and 27 are fixed in an extended state between the inner sheets 14 and 24 and the outer sheets 15 and 25. The number of the waist elastic members 17 and 27 should just be two or more, for example, it is good also as 2-15, 4-12, or 6-9. As shown in FIG. 2, the plurality of waist elastic members 17 and 27 are arranged at predetermined intervals in the longitudinal direction of the disposable diaper. Moreover, it is preferable that the several waist elastic members 17 and 27 are juxtaposed substantially parallel. As shown in FIG. 2, the plurality of waist elastic members 17, 27 are preferably arranged so as to extend substantially in the entire width direction of the front body exterior body 1 and the back body exterior body 2 in the extended state. For example, the plurality of waist elastic members 17 and 27 extend to an area of about 80% to 99%, or 85% to 95% with respect to the length in the width direction of the front body exterior body 1 and the back body exterior body 2. It is preferable to arrange in a state.

  Known elastic elastic members can be used for the Tammy elastic members 16 and 26 and the waist elastic members 17 and 27. For example, it is preferable to apply thread-like elastic rubber to these elastic members. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, or polyester can be used. The material for forming the Tammy stretchable members 16 and 26 is not necessarily limited to these materials, and various known materials having stretchability such as thermoplastic elastomer, plastic sheet, or rubber sheet may be used. it can.

(2-2. Absorbent body)
The absorbent main body 3 is held in a state of being bridged between the front body exterior body 1 and the back body exterior body 2, and is located in the crotch of the wearer when the disposable diaper 100 is worn, and the urine excreted by the wearer. It is a member for absorbing and holding the liquid. As shown in FIG. 2, the absorbent main body 3 has a pair of short sides at both ends joined to the front body exterior body 1 and the back body exterior body 2, and a side connecting both ends of the pair of short sides. It is formed in a substantially rectangular shape with a pair of long sides.
The absorptive main body 3 has an absorbent body 31, a top sheet 32, a back sheet 33, a pair of three-dimensional gathers 34, a cover sheet 35, and a plurality of elastic elastic members 4 as a basic configuration. The elastic elastic member 4 is divided into an outer gather elastic member 41 and an inner gather elastic member 42.
FIG. 3 shows a cross-sectional view of the disposable diaper 100 taken along the line XX shown in FIG. Hereinafter, the structure of each part of the absorptive main body 3 is demonstrated with reference to drawings.

(2-2-1. Absorber)
The absorber 31 is a member for absorbing liquid such as urine and holding the absorbed liquid. The absorber 31 is disposed between a liquid-permeable top sheet 32 and a liquid-impermeable back sheet 33. The absorber 31 has a function of absorbing the liquid that has passed through the top sheet 32 and is made of an absorbent material. As the absorbent material constituting the absorber 31, a known material can be adopted. As an absorptive material, for example, fluff pulp, a superabsorbent polymer, or a hydrophilic sheet may be used. In addition, as the absorbent material, one type of fluff pulp, superabsorbent polymer, or hydrophilic sheet may be used alone, or two or more types may be used in combination. The absorbent material is usually formed and used in a single-layer or multi-layer mat shape. The absorber 31 is preferably enclosed in a region between the top sheet 32 and the back sheet 33. That is, as shown in FIG. 3, the top sheet 32 and the back sheet 33 are preferably joined together so as to surround the absorber 31.

  The shape of the absorber 31 can be appropriately designed according to the shape, size, and application of the disposable diaper. For example, the shape of the absorber 31 is preferably an hourglass shape as shown in FIG. The hourglass shape means that, on the front body exterior body 1 side and the rear body exterior body 2 side, both side edges of the absorbent body 31 have extended portions extending outward in the width direction. In the hourglass type, the extended portions are formed at the four corners of the absorber 31, so that a constricted portion that is curved or refracted toward the inside of the absorber 31 is formed at the center in the longitudinal direction of the absorber 31. Moreover, the absorber 31 is good also as a rectangular shape, an ellipse shape, or a gourd shape currently used for the general disposable diaper.

(2-2-2. Top sheet)
The top sheet 32 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorber 31. For this reason, the top sheet 32 is made of a liquid-permeable material having high flexibility. Further, the top sheet 32 is disposed so as to cover the surface of the absorber 31. The example of the impermeable material which comprises the top sheet 32 is a woven fabric, a nonwoven fabric, or a porous film. Further, for example, a fiber made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which has been subjected to a hydrophilization treatment and further made into a non-woven fabric may be used.

(2-2-3. Backsheet)
The back sheet 33 is a member for preventing the liquid that has passed through the top sheet 32 and absorbed by the absorber 31 from leaking. For this reason, the back sheet 33 is made of a liquid-impermeable material. The back sheet 33 is disposed so as to cover the bottom surface of the absorber 31 in order to prevent liquid leakage from the bottom surface of the absorber 31. An example of the impermeable material constituting the back sheet 33 is a liquid impermeable film made of polyethylene resin. In particular, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed. As shown in FIG. 3, the absorber 31 is placed on the back sheet 33, the top surface of the placed absorber 31 is covered with the top sheet 32, and the top sheet 32 covering the absorber 31 is formed. , And bonded to the back sheet 33 along both side edges of the absorber 31. For example, the top sheet 32 and the back sheet 33 may be bonded by a bonding method using a hot melt adhesive or other fluid adhesive, or may be bonded by heat welding such as heat sealing or ultrasonic welding. It may be.

(2-2-4. Solid gather)
The pair of three-dimensional gathers 34 are members that stand along both side edges of the absorbent main body 3 and prevent side leakage of urine excreted by the wearer. A pair of three-dimensional gathers 34 may be formed along both side edges of the absorbent main body 3, or two or more pairs may be formed. Since the three-dimensional gather 34 becomes a leakage barrier for urine in a standing state (a state in which the elastic elastic member is contracted), urine that has not permeated through the top sheet 32 or urine that has not been absorbed by the absorber 31 can be obtained. It is possible to prevent a situation where the disposable diaper leaks from the opening around the leg.

  The three-dimensional gather 34 is formed by side sheets 34 a arranged along both side edges of the absorber 31. As shown in FIG. 3, the side sheet 34 a is fixed on the top sheet 32 along the longitudinal direction of the disposable diaper. Further, the side sheet 34 a is fixed to the top surface of the top sheet 32 and the bottom surface of the back sheet 33 so as to sandwich both side edges of the top sheet 32 and the back sheet 33.

  In the three-dimensional gather 34, a plurality of elastic elastic members 4 are arranged along the longitudinal direction of the disposable diaper, and stand up by utilizing the contraction force of the plurality of elastic elastic members 4. That is, the elastic elastic member 4 is fixed to the side seat 34a in an extended state. For this reason, when the elastic expansion and contraction member 4 contracts, the side sheets 34a constituting the three-dimensional gather 34 also contract, and the three-dimensional gather 34 rises. The position where the elastic elastic member 4 is disposed can be changed as appropriate according to the shape of the three-dimensional gather and the shape and size of the disposable diaper.

Further, as shown in FIG. 2, the plurality of elastic elastic members 4 are not disposed over the entire length direction of the absorbent main body 3, but the crotch region 3 a in the length direction of the absorbent main body 3. Is arranged at the center. That is, the side sheet 34 a has a region where the three-dimensional gather expansion / contraction member 52 is not disposed in the region at both ends in the length direction of the absorbent main body 3. The crotch region 3 a of the absorbent main body 3 means a region where the absorbent main body 3 is not fixed to either the front body exterior body 1 or the rear body exterior body 2.
However, at least the plurality of elastic elastic members 4 are formed with a length overlapping the front body exterior body 1 and the back body exterior body 2 with the crotch region 3a of the absorbent main body 3 as the center. That is, in the longitudinal direction of the absorbent main body 3, the length in which the plurality of elastic elastic members 4 are arranged is longer than the length of the crotch region 3 a of the absorbent main body 3. For example, the length of the elastic elastic members 4 is 110% to 200%, 120% to 180%, or 130% to 170% with respect to the length of the crotch region 3a of the absorbent main body 3. .

Further, as shown in FIG. 3, each of the three-dimensional gathers 34 is preferably formed by two pairs of gather parts, an outer gather part 341 and an inner gather part 342. Moreover, the outer gathering part 341 and the inner gathering part 342 may be composed of a single sheet material (side seat 34a). That is, as shown in FIG. 3, the side sheet 34 a partially fixed to the back surface (skin non-contact surface) of the back sheet 33 along the longitudinal direction of the absorber 31 is replaced with the top sheet 32 and the back sheet 33. The outer folded portion 341a is formed by folding back toward the inside of the absorbent main body 3 on the outer side in the width direction from the joining position. And the some outside gather expansion-contraction member 41 is arrange | positioned along the longitudinal direction of a disposable diaper in the outer side folding | returning part 341a of the side seat | sheet 34a. As a result, the side seat 34a rises at the outer folded portion 341a using the contraction force of the outer gather expansion / contraction member 41 to form the outer gather portion 341.
In addition, a part of the side sheet 34a folded at the outer folded part 341a is fixed on the surface (skin contact surface) of the top sheet 32 so as to sandwich the top sheet 32 and the back sheet 33. Further, the side sheet 34 a extends inward in the width direction from the fixed line with the top sheet 32, and the extending part faces inward in the width direction or outward in the width direction of the absorber 31. Are folded back to form an inner folded portion 342a. And the inner side gathering part 342a of the side seat | sheet 34a arrange | positions the some inner gather expansion-contraction member 42 along the longitudinal direction of a disposable diaper.
As a result, the outer gather portion 341 and the inner gather portion 342 are formed in the three-dimensional gather 34.

  As the side sheet 34a constituting the three-dimensional gather 34, it is preferable to use a material having water repellency. As an example of the water-repellent material, it is preferable to use a nonwoven fabric such as spunbond or card emboss from the viewpoint of high water repellency and good air permeability. In particular, it is preferable to use a clogged nonwoven fabric such as SMS (spunbond / meltblown / spunbond) or SMMS (spunbond / meltblown / meltblown / spunbond) because of its high water pressure resistance.

(2-2-5. Cover sheet)
The cover sheet 35 is a member for reinforcing the back sheet 33 and improving its feel. As shown in FIG. 3, the cover sheet 35 is bonded to the side of the back sheet 33 that faces the clothing. The cover sheet 35 may be superposed and bonded to a part of the side sheet 34a. As the material constituting the cover sheet 35, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 35.

(3. About the joining aspect of the absorptive main body with respect to a front body exterior body and a back body exterior body)
Then, with reference to FIG.4 and FIG.5, the joining aspect of the absorptive main body 3 with respect to the front body exterior body 1 and the back body exterior body 2 is demonstrated.
FIG. 4 is basically the same as the plan view shown in FIG. 2 except that the part where the absorbent main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 is indicated by hatching. Yes.
Moreover, FIG. 5 has shown sectional drawing of the disposable diaper shown in FIG. 5A is a cross-sectional view taken along line X1-X1 shown in FIG. 4, FIG. 5B is a cross-sectional view taken along line X2-X2, and FIG. 5C is a cross-sectional view taken along line X3-X3. It is sectional drawing in a line. FIG. 5 basically shows a cross-sectional view of the joint portion between the absorbent main body 3 and the front body exterior body 1, but these cross-sectional views show the corresponding absorbent body 3 and the rear body exterior body 2. This is the same as the cross-sectional view of the joint portion. For this reason, sectional drawing of the junction part of the absorptive main body 3 and the back body exterior body 2 is abbreviate | omitted.

  In the embodiment shown in FIG. 4, the region where the absorbent main body 3 overlaps the front body exterior body 1 and the back body exterior body 2 is formed in the longitudinal direction of the absorbent body 3 with both end regions 51, stretchable regions 52, It is divided into an intermediate area 53.

(3-1. Both end regions)
Both end regions 51 are regions formed at both end portions in the length direction of the absorbent main body 3. That is, the both end regions 51 are formed at the end of the region where the absorbent main body 3 and the front body exterior body 1 are joined, and at the end of the region where the absorbent main body 3 and the rear body exterior body 2 are joined. The both end regions 51 are formed to extend from the edge in the length direction of the absorbent main body 3 to a predetermined length in a direction in which the crotch region 3a of the absorbent main body 3 exists. For example, the both end regions 51 are formed toward the crotch region 3a of the absorbent main body 3 in the range of about 5 mm to 50 mm, 10 mm to 45 mm, or 15 mm to 40 mm from the edge in the length direction of the absorbent main body 3. It is preferable. Further, for example, both end regions 51 are 5% to 30% in each of a region where the absorbent main body 3 is joined to the front body exterior body 1 and a region where the absorbent main body 3 is joined to the rear body exterior body 2. Or 10% to 20% of the area.

  As FIG. 4 shows, the absorptive main body 3 has the some elastic expansion-contraction member 4 in the left-right both sides of the width direction. The plurality of elastic elastic members 4 are arranged around the crotch region 3 a of the absorbent main body 3 and have a length that does not reach both end regions 51 of the absorbent main body 3. For this reason, the elastic elastic member 4 is not interposed in the both end regions 51 of the absorbent main body.

  And as FIG. 4 shows, the absorptive main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 in the both end area | region 51 over the whole region. A specific joining state in the both end regions 51 is shown in FIG. FIG. 5A shows a cross-sectional view of both end regions 51 of the absorbent main body 3. As shown in FIG. 5A, the absorbent main body 3 has a first joint 61 formed over the entire width direction, and the front body exterior body is formed in the first joint 61. 1 is joined. Thus, it is preferable that the absorptive main body 3 is joined to the front body exterior body 1 and the back body exterior body 2 in the both end regions 51 without any separation.

  Further, as shown in FIG. 4, it is particularly preferable that the both end regions 51 are formed so as to overlap both end portions in the length direction of the absorbent body 31 of the absorbent main body 3. That is, the both end regions 51 are preferably formed to extend from the longitudinal edge of the absorbent main body 3 toward the crotch region of the absorbent main body 3 to a position where the end of the absorbent body 31 exists. . Thus, by positioning the absorbent body 31 of the absorbent main body 3 in the both end regions 51, for example, when the wearer wears a diaper, the absorbent body 31 of the absorbent main body 3 is displaced or twisted. Can be prevented.

(3-2. Stretching area)
Subsequently, a stretchable region 52 exists in a region where the absorbent main body 3 overlaps the front body exterior body 1 and the back body exterior body 2. The stretchable region 52 extends from the location where the plurality of elastic stretchable members 4 arranged on the left and right sides of the absorbent main body 3 overlap the front body exterior body 1 and the back body exterior body 2 in the width direction of the absorbent body 3. This is a region formed by The stretchable region 52 is formed at a position closest to the crotch region 3 a among the regions formed in the absorbent main body 3. That is, the stretchable region 52 is a region where the absorbent main body 3 is joined to the end portions of the front body exterior body 1 and the back body exterior body 2 on the crotch region 3a side.

  For example, the stretchable region 52 is within the range of about 10 mm to 100 mm, 20 mm to 90 mm, or 30 mm to 80 mm from the edge on the crotch region 3 a side of the front body exterior body 1 and the back body exterior body 2. It is preferably formed in the longitudinal direction. For example, the stretchable region 52 is 20% to 60% in each of a region where the absorbent main body 3 is joined to the front body exterior body 1 and a region where the absorbent main body 3 is joined to the rear body exterior body 2. Or an area of 30% to 50%. In particular, the stretchable region 52 is preferably located in a region including the second regions 13 and 23 of the front body exterior body 1 and the back body exterior body 2. In addition, the stretchable area 52 may have different occupation area ratios in a region where the absorbent main body 3 is the front body exterior body 1 and a region where the absorbent main body 3 is the front body exterior body 1.

  The stretchable region 52 is further divided into an outer region 52a positioned on the left and right outer sides in the width direction of the absorbent main body 3, and an inner region 52b positioned on the inner side of the outer region 52a. The pair of left and right outer regions 52 a includes at least an outer elastic elastic member 4 a located at the outermost side in the width direction of the absorbent main body 3 among the plurality of elastic elastic members 4 arranged on the left and right sides of the absorbent main body 3. This is the area that was placed. However, one or a plurality of elastic elastic members 4 may be arranged in the outer region 52a in addition to the outer elastic elastic members 4a. For example, in the example shown in FIG. 4, in addition to the outer elastic elastic member 4a, one elastic elastic member 4 is arranged in the outer region 52a.

  Further, an inner region 52b is formed in a region between the pair of left and right outer regions 52a in the stretchable region 52. In the stretchable region 52, the proportion of the area occupied by the inner region 52b is preferably larger than the proportion of the area occupied by the pair of outer regions 52a. For example, the ratio of the area occupied by the inner region 52b is preferably 70 to 95%, 85% to 90%, or 80% to 85%.

  As shown in FIG. 4, the absorbent main body 3 is separated from the front body exterior body 1 and the back body exterior body 2 in the stretchable region 52 in the pair of left and right outer regions 52a, and the inner region 52b therebetween. Then, it is fully bonded. A specific joining state in the stretchable region 52 is shown in FIG. FIG. 5B shows a cross-sectional view of the stretchable region 52 of the absorbent main body 3. As shown in FIG. 5 (b), the absorbent main body 3 has a second joint 62 formed over the entire inner region 52b. It is joined to the body 1. On the other hand, the absorptive main body 3 does not have a joining part in a pair of outer side area | region 52a located in the width direction outer side of the inner side area | region 52b, and is spaced apart from the front body exterior body 1. FIG. That is, the pair of outer regions 52a includes at least the outer elastic elastic member 4a positioned at the outermost side in the width direction of the absorbent main body 3, and the outer elastic elastic member 4a is provided on the front body exterior body 1. It is not fixed. As described above, the absorbent main body 3 is separated from the front body exterior body 1 and the back body exterior body 2 in the stretchable region 52 by the pair of outer regions 52a and joined by the inner region 52b positioned therebetween. Preferably it is.

  In addition, as shown in FIG. 4, the width of the inner region 52 b in the stretchable region 52 is preferably larger than the width of the absorbent body 31 of the absorbent main body 3. That is, the inner region 52 b in the stretchable region 52 is preferably formed so as to spread outward in the width direction from the absorbent body 31 of the absorbent main body 3. Thus, by forming the inner region 52b in the stretchable region 52 wider than the absorbent body 31 of the absorbent main body 3, for example, when the wearer wears a diaper, the absorbent main body 3 absorbs It is possible to prevent the positional shift or twist in the body 31.

  Further, as shown in FIG. 5B, in the form in which the outer gathering portion 341 and the inner gathering portion 342 are formed on the absorbent main body 3, the inner gathering region 52b in the stretchable region 52 has at least the outer gathering portion. It is preferable that one or more of the plurality of outer gather elastic members 41 that form 341 are positioned. That is, among the plurality of outer gather elastic members 41, the outer gather elastic member 41 (outer elastic elastic member 4a) located on the outermost side in the width direction of the absorbent main body 3 is located in the outer region 52a of the elastic region 52, On the other hand, the outer gather elastic member 41 located on the innermost side is preferably located in the inner region 52 b of the elastic region 52. Thereby, the outer gather elastic member 41 (outer elastic elastic member 4a) located on the outermost side is not joined to the front body exterior body 1 and the back body exterior body 2, but is separated. On the other hand, the outer gather elastic member 41 located on the innermost side is joined to the front body exterior body 1 and the rear body exterior body 2. As described above, the plurality of outer gather expansion / contraction members 41 are separated from the front body exterior body 1 and the back body exterior body 2 and are joined to the front body exterior body 1 and the back body exterior body 2. The absorptive main body 3 can be stably joined to the front body exterior body 1 and the back body exterior body 2 without impairing the function of the outer gather expansion / contraction member 41.

(3-3. Intermediate region)
Furthermore, it is preferable that an intermediate region 53 exists in a region where the absorbent main body 3 overlaps the front body exterior body 1 and the back body exterior body 2. The intermediate region 53 is a region located between the both end regions 51 and the stretchable region 52 in the length direction of the absorbent main body 3. In the middle region 53, similarly to the both end regions 51, a plurality of elastic elastic members 4 arranged on both sides of the absorbent main body 3 may not be located, or an elastic elastic member located in the elastic region 52. A part of 4 may extend. The intermediate region 53 connects the both end regions 51 and the expansion / contraction region 52 and is not an essential element.

  For example, the intermediate region 53 is 10% to 75% in each of the region where the absorbent main body 3 is joined to the front body exterior body 1 and the region where the absorbent main body 3 is joined to the rear body exterior body 2, or It is preferable to occupy an area of 30% to 60%. The area ratio of the intermediate region 53 can be appropriately changed according to the area ratios of the both end regions 51 and the stretchable region 52. Further, even if the intermediate area 53 has different occupation area ratios in the area where the absorbent main body 3 is joined to the front body exterior body 1 and the area where the absorbent main body 3 is joined to the rear body exterior body 2. Good.

  The intermediate region 53 is further divided into a joining region 53a located at the center in the width direction of the absorbent main body 3 and a non-joining region 53b located outside the joining region 53a in the width direction. In the width direction of the absorbent main body 3, the width of the joining region 53 a of the intermediate region 53 is narrower than the width of both end regions 51 and wider than the width of the inner region 52 b of the stretchable region 52. For example, the width of the joining region 53 a of the intermediate region 53 is preferably 70% to 95%, 75% to 90%, or 80% to 85% with respect to the width of the both end regions 51. Further, for example, the width of the joining region 53a of the intermediate region 53 is 105% to 150%, 110% to 130%, or 115% to 120% with respect to the width of the inner region 52b of the stretchable region 52. preferable. In the example shown in FIG. 4, the width of the junction region 53a of the intermediate region 53 is constant. However, the width of the joining region 53a of the intermediate region 53 may be gradually reduced from the both end regions 51 toward the stretchable region 52, or may be gradually reduced steplessly. .

  In the intermediate region 53, the proportion of the area occupied by the bonding region 53a is preferably larger than the proportion occupied by the pair of non-bonding regions 53b. For example, the proportion of the non-bonded region 53b is preferably 70 to 95%, 85% to 90%, or 80% to 85%. Note that the width of the non-bonded region 53b of the intermediate region 53 may be appropriately changed according to the width of the bonded region 53a.

  And as FIG. 4 shows, the absorptive main body 3 is joined to the front region exterior body 1 and the back body exterior body 2 in the intermediate region 53 entirely in the joining region 53a, and is located outside thereof. The non-bonding region 53b to be separated is separated. A specific joining state is shown in FIG. FIG. 5 (c) shows a cross-sectional view of an intermediate region of the absorbent main body 3. As shown in FIG. 5C, the absorbent main body 3 has a third joint 63 formed over the entire joint region 53a. In the third joint 63, the front body exterior is formed. It is joined to the body 1. On the other hand, the absorptive main body 3 does not have a joining part in a pair of non-joining area | regions 53b located in the width direction outer side of the joining area | region 53a, and is spaced apart from the front body exterior body 1. FIG.

  Further, as shown in FIG. 4, the width of the joining region 53 a in the intermediate region 53 is preferably larger than the width of the absorbent body 31 of the absorbent main body 3. That is, it is preferable that the joining region 53 a in the intermediate region 53 is formed so as to spread outward in the width direction from the absorbent body 31 of the absorbent main body 3. Thus, by forming the joining region 53a wider than the absorbent body 31 of the absorbent main body 3, for example, in a state where the wearer wears a diaper, the joint area 53a is positioned on the absorbent body 31 of the absorbent main body 3. It is possible to prevent misalignment and twisting.

In the present invention, a difference occurs between the joining width of the both end regions 51 and the joining width of the inner region 52b in the stretchable region 52. Therefore, if the difference in the joining width is large, for example, the wearer wears a diaper. When a load is applied to the absorbent main body 3 such as when it moves, the joining of the both end regions 51 of the absorbent main body 3 is easily peeled off. Therefore, by providing the intermediate region 53 between the both end regions 51 and the stretchable region 52 and reducing the difference in the joint width in each region, it becomes possible to improve the joint strength of the entire absorbent main body 3 and fix it. The state can be stabilized.
In addition, by providing an intermediate region 53 between the end region 51 and the stretchable region 52 to reduce the difference in the bonding width in each region, unnecessary wrinkles do not enter the exterior body, and the appearance and the feeling of touch are good. Become.

As mentioned above, in this specification, in order to express the content of this invention, embodiment of invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.
For example, the outer region 52a in the stretchable region 52 of the absorbent main body 3 includes all of the plurality of elastic stretchable members 4 arranged on the left and right side portions of the absorbent main body 3, and all of the elastic stretchable members 4 are predecessors. The outer body 1 and the rear body 2 may be separated from each other.
Further, for example, the absorbent main body 3 may have a plurality of intermediate regions 53 formed between the both end regions 51 and the stretchable region 52.

  The disposable diaper according to the present invention can be applied to diapers for infants and the elderly. Therefore, the present invention can be suitably used in industries related to childcare and nursing care.

DESCRIPTION OF SYMBOLS 1 Front body exterior body 2 Back body exterior body 3 Absorbent main body 3a Crotch region 4 Elastic elastic member 4a Outer elastic elastic member 5 Waist circumference opening part 6 Leg circumference opening part 11,21 Side seal part 12,22 1st area | region 13, 23 Second region 14, 24 Inner sheet 15, 25 Outer sheet 16, 26 Tammy expansion / contraction member 17, 27 Waist expansion / contraction member 31 Absorber 32 Top sheet 33 Back sheet 34 Three-dimensional gather 34a Side sheet 341 Outer gather part 341a Outer Folded portion 342 Inner gathered portion 342a Inner folded portion 35 Cover sheet 41 Outer gathered elastic member 42 Inner gathered elastic member 51 Both ends region 52 Stretched region 52a Outer region 52b Inner region 53 Intermediate region 53a Joined region 53b Non-joined region 61 First joined Part 62 second joint part 63 third joint part 100 Have discarded diapers

Claims (6)

It has a front body exterior body (1), a rear body exterior body (2), and an absorbent main body (3).
The front body side of the absorbent main body (3) is fixed to the front body exterior body (1),
The back body side of the absorbent main body (3) is fixed to the back body exterior body (2),
The crotch region located between the front body side and the back body side of the absorbent main body (3) is not fixed to either the front body exterior body (1) or the back body exterior body (2). A diaper,
The absorbent main body (3) is disposed between the liquid permeable top sheet (32), the impermeable back sheet (33), and between the top sheet (32) and the back sheet (33) to absorb liquid. An absorbent body (31) for holding and holding , and a side sheet (34a) disposed along both side edges of the absorbent body (31) ,
The side sheet (34a) is partially fixed on the top sheet (32) at a fixed line along the longitudinal direction of the disposable diaper,
The absorbent main body (3) is provided with a plurality of elastic elastic members (4) on both left and right sides in the width direction of the absorbent main body (3) ,
The plurality of elastic elastic members (4) include a plurality of outer gather elastic members (41) fixed to the side seat (34a) on the outer side in the width direction than the fixed line, and the width more than the fixed line. An inner gather elastic member (42) fixed to the side seat (34a) on the inner side in the direction,
The outer gather expansion / contraction member (41) reaches at least both end regions (51) located at both ends in the length direction of the absorbent main body (3) along the length direction of the absorbent main body (3). Are arranged in a length that does not
The absorbent body (3), in the length direction of the ends region (51), the front body outer body (1) and the back body outer body with respect to (2), across the entire width joining Has been
The absorbent main body (3)
From the point overlapping the outer gather elastic member (41) is the front body outer body (1) and the back body outer body (2), in the stretchable region (52) over the width direction,
Among the plurality of outer gather elastic members (41), the outer resilient and elastic members (4a) is arranged outside a region located outermost at least the width direction (52a), the front body outer body (1) and Spaced apart from the back body exterior body (2),
In the outer region (52a) the width direction inside the inner region than (52 b), is joined to the front body outer body (1) and the back body outer body (2),
Wherein the plurality of outer gather elastic members (41), the outer gather elastic member located innermost least the width direction (41) is located in the inner region (52 b),
The width of the inner region (52b) is larger than the width of the absorber (31),
The said absorptive main body (3) is a disposable diaper joined with respect to the said front body exterior body (1) and the said back body exterior body (2) over the front-back direction whole region of the said inner side area | region (52b). The disposable diaper according to claim 1, wherein at least one outer gather elastic member (41) is further arranged in the outer region (52a) in addition to the outer elastic elastic member (4a). The disposable diaper according to claim 1 or 2, wherein a ratio of an area occupied by the inner region (52b) in the stretchable region (52) is 70% to 90%. The absorbent main body (3) has an intermediate region (53) between the both end regions (51) and the stretchable region (52),
In the intermediate region (53), the absorbent main body (3) is narrower than the both end regions (51) and wider than the inner region (52b) of the stretchable region (52) ( The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is joined to the front body exterior body (1) and the back body exterior body (2) at 53a). The width of the joining region (53a) in the intermediate region (53) is gradually narrowed stepwise or steplessly from the both end regions (51) toward the stretchable region (52). The disposable diaper described. The front body exterior body (1) and the rear body exterior body (2) have a pair of side seal portions (11, 21) that are joined together in a state where the left and right side portions thereof are overlapped with each other. ,
The front body exterior body (1) and the back body exterior body (2) are:
A first region (12, 22) extending from the location where the pair of side seal portions (11, 21) is formed to the width direction of the diaper;
Formed by the second region (13, 23) extending from the first region (12, 22) in the direction in which the crotch region of the absorbent main body exists,
The width of the diaper in the width direction of the second region (13, 23) is narrower than that of the first region (12, 22) and gradually narrows toward the crotch region,
In the absorbent main body (3), the stretchable region (52) is located in a region including the second region (13, 23) of the front body exterior body (1) and the back body exterior body (2). The disposable diaper according to any one of claims 1 to 5, wherein the disposable diaper is joined to the front body exterior body (1) and the back body exterior body (2).

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