JP5964146B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a disposable diaper.

About the absorbent articles, such as a disposable diaper, the thing of the various leak-proof structure is proposed for the purpose of preventing the side leakage of the excrement from the suspension.
For example, Patent Document 1 discloses an absorption in which one cover sheet is folded to form a first leak-proof wall and a second leak-proof wall, and a back sheet side edge is sandwiched inside the first leak-proof wall. A sex product is disclosed. Thereby, it is supposed that the absorbent article which was excellent in leak-proof property and simplified without requiring another member can be provided.
Patent Document 2 discloses a disposable diaper including a collar gather made of an inner sheet and leg gathers formed at a connecting portion between the inner sheet and a back sheet on both sides of the top sheet. Yes. The inner sheet and the back sheet are formed by laminating a nonwoven fabric and a film. Thereby, even if a liquid spread | diffuses by a wearer's operation | movement, it will absorb reliably, and it is supposed that a liquid leak can be prevented.
Furthermore, Patent Document 3 discloses a pants-type disposable diaper having a three-dimensional gather having a plurality of elastic members arranged on both sides of an absorbent main body. The plurality of elastic members include a first elastic member having the largest stretching force. In this diaper, the three-dimensional gather is folded to the wearer side starting from the first elastic member and fits around the thigh to prevent side leakage.

JP 2008-43444 A Japanese Patent Laid-Open No. 2004-481 JP 2011-110317 A

  The present invention relates to an absorbent article that further improves the side leakage prevention performance in the above-described prior art and softens the touch of a three-dimensional gather that comes into contact with the skin to reduce the load on the skin.

  The present invention includes a vertically long absorbent main body including an absorbent core, an inner three-dimensional gathered portion disposed on both sides of the absorbent main body, and an outer three-dimensional gathered portion located outward in the width direction from the inner three-dimensional gathered portion. The absorbent article is divided into an abdominal part, a crotch part, and a dorsal part, from the non-skin contact surface side of the absorbent core to the outer three-dimensional gather part and the inner three-dimensional gather part. An absorbent article in which a water-repellent film is continuously disposed is provided.

  The absorbent article of the present invention can further improve the side leakage prevention performance, and can soften the touch of a three-dimensional gather that comes into contact with the skin to reduce the load on the skin.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows typically the underpants type disposable diaper as preferable embodiment (1st Embodiment) which concerns on the absorbent article which concerns on this invention as a shape of a wearing condition in general. It is a partial notch expansion | deployment top view which shows the state which expand | deployed and expanded the underpants type disposable diaper of this embodiment from the skin contact surface side. It is an expanded sectional view which shows the III-III line cross section of FIG. It is a partial expanded sectional view which expands and shows only the left side part of sectional drawing shown in FIG. It is an expanded sectional view equivalent to FIG. 4 which shows the modification of the underpants type disposable diaper of this embodiment. It is an expanded sectional view equivalent to FIG. 4 which shows another modification of the underpants type disposable diaper of this embodiment. FIG. 5 is a partially cutaway developed plan view corresponding to FIG. 2 showing a pants-type disposable diaper as another preferred embodiment (second embodiment) according to the absorbent article of the present invention. In the manufacturing method of the underpants type disposable diaper of this embodiment, it is a schematic explanatory drawing which shows the process of sandwiching a water-repellent film and forming an inside solid gather part and an outside solid gather part.

Hereinafter, a pants-type disposable diaper which is a preferred embodiment (first embodiment) of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, a pants-type disposable diaper 10 according to the present embodiment includes an annular exterior body 2 constituting a waistline portion D and an absorbent main body 3 constituting a crotch portion C. On both sides of the absorbent main body 3, an inner three-dimensional gather portion 4 and an outer three-dimensional gather portion 5 are arranged along the longitudinal direction. The annular exterior body 2 includes an abdominal side band 21 and a back side band 22 that form approximately half a circumference of the waistline portion D. Two side edges of the ventral band 21 and the dorsal band 22 (shown in FIG. 2, the left and right side portions 25, 25 of the ventral side band 21 and the left and right side portions 26, 26 of the dorsal side band 22) Seal portions 11, 11 are formed. Thereby, the diaper 10 has the waist opening part 12 by which the upper end of the waist part D was open | released, and a pair of leg opening parts 13 and 13 by which the right and left both sides of the crotch part C were open | released. The side seal part 11 can be formed using arbitrary means, such as heat sealing and ultrasonic sealing.

  On the other hand, as shown in FIG. 2, the shape of the diaper 10 ruptured and developed by the side seals 11 and 11 is an abdominal side portion F and a dorsal side arranged on the abdomen side of the wearer in the longitudinal direction (Y direction). Are divided into a dorsal side portion R and a crotch portion C located therebetween. The ventral side F is composed of a ventral band 21, and the dorsal side R is composed of a dorsal band 22. The absorptive main body 3 is arranged so as to connect the abdominal side F and the back side R from the crotch part C, and is fixed to the skin contact surface side of the abdominal side band 21 and the back side band 22. Thus, the portion of the absorbent main body 3 disposed between the ventral side F and the back side R forms the crotch C. The developed diaper 10 has an I-shape having a longitudinal direction (Y direction) and a width direction (X direction) as a whole. As a method for fixing the absorbent main body 3, for example, a method using an adhesive, heat sealing, ultrasonic sealing, or the like is used.

  In the present invention, unless otherwise specified, the side in contact with the human body is referred to as the skin surface side or the skin contact surface side or the surface side, and the opposite side is referred to as the non-skin surface side or the non-skin contact surface side or the back surface side. That's it. The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. The normal direction of the front or back surface of the absorbent article is referred to as the thickness (thickness) direction, and the amount is referred to as thickness (thickness).

  The abdominal side band 21 and the back side band 22 constituting the annular exterior body 2 are composed of one or more inner layer sheets 23 on the wearer skin surface side and an outer layer sheet 24 on the wearer non-skin surface side. Both the inner layer sheet 23 and the outer layer sheet 24 are preferably made of a nonwoven fabric, and are substantially water-repellent and have water vapor permeability. Between the inner layer sheet 23 and the outer layer sheet 24, a waist elastic member 27 and a waist elastic member 28 are fixed in an extended state along the waist direction. These elastic members expand and contract appropriately in the waistline direction when the diaper 10 is worn to form a waistline gather and a waistline gather to fit the diaper 10 around the wearer's waist.

  As shown in FIGS. 2 and 3, the absorbent main body 3 includes a liquid permeable top sheet 31, a liquid hardly permeable or water repellent back sheet 32, and a liquid retaining absorbent core disposed between both sheets. 33 is a vertically long shape. The top sheet 31 is arranged on the skin contact surface side of the absorbent core 33 and allows the excretory fluid and the like to quickly pass through the absorbent core 33. The back surface sheet 32 is arranged on the non-skin contact surface side of the absorbent core 33 and prevents leakage such as the leakage of the liquid absorbed and held by the absorbent core 33. Furthermore, an outer nonwoven fabric sheet 34 is provided on the non-skin contact surface side of the back sheet 32. As the top sheet 31, a hydrophilic air-through nonwoven fabric is used from the viewpoint of promptly permeating the excreted body fluid and leading it to the absorbent core 33 and from the viewpoint of good touch. Further, as the back sheet 32, a water repellent film is used. The water-repellent film is preferably a porous film that is hardly permeable to liquid and has water vapor permeability, from the viewpoint of preventing the diaper 10 from being stuffy.

  The absorbent core 33 is an aggregate containing hydrophilic fibers (fluff pulp), a highly water-absorbing polymer, and the like, and the outer periphery thereof is covered with a core wrap sheet (not shown). In this embodiment, the absorptive core 33 consists of two layers of the upper layer absorption part 33a and the lower layer absorption part 33b. The upper layer absorbing portion 33a is arranged at the center in the width direction so as to be narrower than the lower layer absorbing portion 33b, and forms a middle-high portion that easily takes in excretory fluid. Two grooves 33c and 33c along the longitudinal direction (Y direction) are formed in the lower layer absorbent portion 33b, and serve as a flexible portion of the absorbent core 33. Thereby, the absorptive core 33 whole is easy to follow a wearer's skin undulation, and it is made easy to follow a body movement and to fit. The absorbent core 33 as a whole has a rectangular shape similar to the absorbent main body 3 in plan view, but is not limited thereto, and various shapes used for this type of article such as a shape confined at the crotch are adopted. it can. Moreover, the absorptive core 33 may consist of one layer, and may have no groove part.

  The outer nonwoven fabric sheet 34 extends from both side edges 35, 35 of the absorbent main body 3 outward in the width direction (X direction) to form the three-dimensional gather portion forming sheets 6, 6, and the inner three-dimensional gather portion 4 and the outer three-dimensional gather. Part 5 is formed. That is, the three-dimensional gather portion forming sheet 6 forms the inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5. The inner solid gathers 4 are disposed on both sides of the absorbent main body 3, and the outer solid gathers 5 are disposed outward in the width direction (X direction) relative to the inner solid gathers 4. The inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5 each have elastic members 41 and 51 arranged in an extended state. Due to the contraction force of the elastic members 41 and 51, the crotch part C stands up toward the wearer's skin when the diaper 10 is worn. Thereby, the outflow of the liquid excreted by the diaper 10 can be prevented, and the lateral leakage of the liquid can be prevented.

  Furthermore, the water-repellent film forming the back sheet 32 is continuously disposed from the non-skin contact surface side of the absorbent core 33 to the outer three-dimensional gather portion 5 and the inner three-dimensional gather portion 4. More specifically, the water repellent film extends from the non-skin contact surface side of the absorbent core 33 to the outer three-dimensional gather portion 5 in the width direction outer side, and from the outer three-dimensional gather portion 5 to the inner side in the width direction. The three-dimensional gather portion 6 is continuously arranged in a folded manner. That is, the water-repellent film covers the surface facing the absorbent main body 3 in the two three-dimensional gather portions 4 and 5 and the non-skin contact surface side of the absorbent core 33 without any breaks. Here, “continuously arranged” means that the water-repellent film is arranged in the width direction without a joint or a gap, and typically means that one sheet member is arranged. As a result, a gap through which the liquid leaks is less likely to occur, and the leakage preventing properties of the two three-dimensional gather portions 4 and 5 are enhanced.

Further, the water-repellent film arranged in this way forms a leak-proof wall for the side portion of the absorbent core 33. That is, not only the liquid transmitted through the surface sheet 31 but also the liquid leaking from the absorbent core 33 to the side edge or the non-skin contact surface side can be effectively blocked. The water-repellent film easily repels liquid due to its water repellency, and the liquid does not easily spread on the film surface. Therefore, even if liquid adheres to the water-repellent film on the surface facing the absorbent core 33 such as the inner three-dimensional gathered portion 4, the non-woven fabric of the sheet 6 forming the gathered portion 4 is moistened by being repelled on the film. It is difficult to become a state. As a result, exudation of the liquid is effectively prevented. And since a water-repellent film repels a liquid, it is hard to produce the film | membrane of the liquid by the wet spread on the surface, and the air permeability of the three-dimensional gather parts 4 and 5 is not inhibited. Further, the repelled liquid returns to the pocket p surrounded by the water-repellent film of the three-dimensional gathered portions 4 and 5 and the absorbent core 33 and is easily absorbed and held by the absorbent core 33 again.
In the present embodiment, the water-repellent film forming the back sheet 32 is described as a member that improves a series of leak-proof properties from the non-skin contact surface side of the absorbent core 33 to the two three-dimensional gather portions 4 and 5. When it does, it calls the water-repellent film 7. Further, in the arrangement of the water repellent film 7, a core wrap sheet or other member is interposed between the absorbent core 33 and the water repellent film 7 as long as it extends from the non-skin contact surface side of the absorbent core 33. It may be.

Next, with reference to FIG. 4, the concrete structure and the effect | action of the inner side three-dimensional gather part 4 and the outer side three-dimensional gather part 5 are explained in full detail. In addition, since the diaper 10 is a left-right symmetric structure, the structure of the left side inner gathers part 4 and the outer side three-dimensional gathers part 5 which are shown by FIG. 4, and the following description are applied similarly on the right side.
The outer three-dimensional gather portion 5 is sandwiched in a state in which the three-dimensional gather portion forming sheet 6 extending from the both side edges of the absorbent main body 3 outward in the width direction (X direction) is folded and the elastic member 51 is extended. Become. More specifically, the three-dimensional gather portion forming sheet 6 is folded back and folded along a fold line in the longitudinal direction (Y direction) that becomes the gather tip 53. The elastic member 51 is disposed between the folded sheet layers along the fold line. The end portions of the two-folded portions are joined together by a linear joining portion 8 (see FIG. 2) along the longitudinal direction, thereby forming a bag-like outer sheet laminated portion 52. The stretched state of the elastic member 51 is a state in which the diaper 10 is expanded in the Y direction as shown in FIG. 2, and the abdominal side F, the crotch C, and the back side R are It is the state extended in the direction of alignment. This also applies to the inner three-dimensional gather unit 4 described later.
Moreover, the longitudinal direction end part of the outer side three-dimensional gather part 5 is joined to the ventral side band 21 and the back side band 22 in the ventral side part F and the back side part R. The stretched elastic member 51 can be contracted between the joined end portions in the longitudinal direction. Therefore, when the diaper 10 is a finished product (see FIG. 1) in which the side seal portion 11 is formed from the unfolded state, the elastic member 51 contracts. Thereby, when the diaper 10 is mounted, a portion disposed on the crotch part C of the outer three-dimensional gather portion 5 stands as a free end between the fixed longitudinal end portions, and the gather tip 53 and its surroundings are worn. It touches the skin of the person and forms a leak-proof wall.

The thus formed upright outer standing gathers part 5 (see arrow f ₂ in FIG. 4) is erected toward the linear joint portion 8 toward the width direction outside the absorbent body 3 as standing point (hereinafter, When this linear joint portion 8 is described as the standing point of the outer three-dimensional gather portion 5, it is referred to as a standing point 58). Therefore, the inner side (skin contact surface side) part of the gather tip 53 is in contact with the thigh part of the crotch while covering the buttocks, and even if exudate or the like oozes out from the inner three-dimensional gather part 4. Dams effectively prevent side leakage.

As described above, the outer three-dimensional gather portion 5 is provided with the water repellent film 7 extending from the non-skin contact surface side of the absorbent core 33. Specifically, the water-repellent film 7 extending from the non-skin contact surface side of the absorbent core 33 is sandwiched between the sheet layers of the outer sheet laminated portion 52 beyond the linear joint portion 8. Thereby, the leak-proof property by the outer three-dimensional gather part 5 is improved. In addition, since the water-repellent film 7 extends under the thick flat absorbent core 33, the water-repellent film 7 is relatively easy to follow along the width direction, helping the rigidity of the absorbent core 33. Therefore, along the extending direction of the water-repellent film 7, the outer three-dimensional gathered portion 5 including this easily stands up while spreading outward in the width direction of the absorbent main body 5 (see arrow f _{2 in} FIG. 4). As a result, the outer three-dimensional gather part 5 can cover the collar part firmly without being easily displaced inward. In particular, in the configuration in which the side edges of the crotch portion C are linear in the vertically long absorbent main body 3 as in the present embodiment, the protrusion of the buttocks can be effectively suppressed.

  Moreover, in the outer three-dimensional gather part 5, it is preferable that the water-repellent film 7 is folded in two along the folding line 55. The water-repellent film 7 folded in half has a bag shape with the linear joint portion 8 as a closed mouth inside the outer sheet laminated portion 52. Thereby, even if there is a liquid transfer from the side edge of the absorbent core 32, the water-repellent film 7 is dammed by the bag-like portion. Thereby, it can prevent effectively that a liquid leaks to the nonwoven fabric of the outer layer sheet lamination | stacking part 52, or its outer side. Although not shown in the drawing, the water-repellent film 7 is preferably formed in the same manner in the inner three-dimensional gather portion 4 described later, and in at least one of the inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5. The water repellent film 7 is preferably sandwiched in a folded state.

On the other hand, the inner three-dimensional gather portion 4 is formed such that the portion of the three-dimensional gather portion forming sheet 6 folded back at the gather tip 53 extends inward in the width direction (X direction) beyond the linear joint portion 8. Yes. More specifically, the end portion of the three-dimensional gather portion forming sheet 6 beyond the linear joint portion 8 is folded in two along a longitudinal fold line (Y direction) that becomes the gather tip 43. The elastic member 41 is disposed between the folded sheet layers along the fold line. The ends of the two-folded portions are joined at the joining portion 9 to form a bag-shaped inner sheet laminated portion 42 having a gather tip 53.
Moreover, the longitudinal direction edge part of the inner side three-dimensional gather part 4 is joined to the absorptive main body 3 in the abdominal side part F and the back side part R. As shown in FIG. The stretched elastic member 41 can be contracted between the joined end portions in the longitudinal direction. Therefore, when the diaper 10 is a finished product (see FIG. 1) in which the side seal portion 11 is formed from the unfolded state, the elastic member 41 contracts. As a result, when the diaper 10 is mounted, the portion disposed on the crotch part C of the inner three-dimensional gather portion 4 stands as a free end between the fixed longitudinal end portions, and the gather tip 43 and its surroundings are worn. It makes contact with the groin of the person and forms a leak-proof wall.

The standing of the inner three-dimensional gather portion 4 formed in this way is slightly inclined toward the absorbent main body 3 side with the linear joint portion 8 provided outside in the width direction of the absorbent core 33 as the rising point. a standing toward the upward (see FIG arrow f ₁ of 4) (hereinafter, the linear joined portions 8, when describes the the standing point of the inner standing gathers 4, referred to as a standing point 48.). Thereby, the transfer of the excrement from the side edge 35 of the absorptive main body 3 is blocked, and side leakage is effectively prevented.

As described above, the water-repellent film 7 is disposed on the inner three-dimensional gather portion 4. Specifically, the portion of the water-repellent film 7 that is folded back by the folding line 55 passes over the linear joint portion 8 and is sandwiched between the sheet layers of the inner sheet laminated portion 42. Thereby, the water-repellent film 7 covers the upright point 48 that is the base of the inner three-dimensional gather portion 4 and the inner sheet laminated portion 42 without any gaps, and leakage prevention is improved. In addition, the arrangement of the water-repellent film 7 described above is suitable for standing up inward in the width direction of the inner three-dimensional gather portion 4. That is, the arrangement of the inner three-dimensional gather portion 4 from the outer side in the width direction from the folding line 55 to the end portion 45 of the inner three-dimensional gather portion 4 is, for example, compared with the arrangement in which it rises immediately from the bottom of the absorbent core 33 and is turned inward. This is because it is relatively along the standing direction. In addition, the arrangement is less affected by the thickness of the absorbent core 33 than the structure of directly entering the inner three-dimensional gather portion 4 from the absorbent core 33, and the standing property of the inner three-dimensional gather portion 4 is less likely to be hindered. Further, the arrangement of the water-repellent film 7 described above connects the inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5 together with the three-dimensional gather portion forming sheet 6, and both elastic members 41 and 51 interact to form both gather portions. 4 and 5 (see arrows f ₁ and f _{2 in} FIG. 4) are easily improved. As described above, the arrangement of the water-repellent film 7 described above, becomes suitable to orthostatic toward widthwise inward of the inner standing gathers 4 (see arrow f ₁ in FIG. 4). Thereby, the gather tip 43 is hard to turn over at the time of wearing, and it contacts firmly to a wearer's groin part, and a leak-proof property is improved.

  In the diaper 10 of the present embodiment, the water repellent film 7 is preferably arranged so as not to reach the gather tips 43 and 53 of the inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5. In the present embodiment, that the water repellent film 7 does not reach the gather tips 43 and 53 means that the water repellent film 7 does not reach the positions of the gather tips 43 and 53 inside the inner sheet laminate portion 42 and the outer sheet laminate portion 52. That means. And it is preferable that the water-repellent film 7 is arranged in front of the elastic members 41 and 51 at the gathered tip 43 and 53 positions without involving them. Thereby, the increase of the member by the water-repellent film 7 which improves leak-proof property does not reach the gather tip 43 and 53 periphery contact | abutted to skin, and the softness of the nonwoven fabric which makes the sheet | seat 6 is hold | maintained. Further, since the contraction force of the elastic members 41 and 51 is easily transmitted around the gather tips 43 and 53, it is easy to stand up sufficiently without increasing the contraction force regardless of the increase in thickness and rigidity due to the water-repellent film 7. As a result, both the gathers 4 and 5 can be firmly attached to the skin without increasing the contraction force of the elastic members 41 and 51 while improving the leak-proof property by the water repellent film 7. By suppressing the shrinkage force of the elastic members 41 and 51, the softness of the nonwoven fabric is obtained and the touch becomes soft. Furthermore, since the suppressed shrinkage force is directly transmitted to the soft nonwoven fabric, the nonwoven fabric is not excessively twisted, and relatively fine wrinkles are easily formed. This fine heel makes it difficult for the gathers 4 and 5 to follow the movement of the wearer wearing the diaper 10 to create a gap, and a high leak-proof property is obtained.

  Moreover, in the inner sheet lamination part 42 and the outer sheet lamination part 52, it is preferable that the sheet 6 for forming a three-dimensional gather part and the water-repellent film 7 are not bonded over the entire surface. Thereby, compared with the case where the member which laminated both sheets is used, the nonwoven fabric which makes the sheet | seat 6 is easy to deform | transform without being restrained by the water-repellent film 7. FIG. Therefore, the softness of the nonwoven fabric is maintained, and the contact with the skin can be softened. Here, the “not joined on the entire surface” state refers to a state in which the three-dimensional gather portion forming sheet 6 has a portion that is not completely integrated with the water-repellent film 7 and can be deformed independently. For example, (i) Spiral (Ii) a tip (end) where the sheet 6 for forming a three-dimensional gather portion and the water-repellent film 7 are overlapped, or a folded portion of one of the sheets (of the water-repellent film 7). The edge 45, the wrapping line 55, the gather tips 43, 53, etc.) are formed by providing a dry edge region to which no adhesive is applied so that hot melt or the like does not stick out from the joining portion. obtain.

  On the other hand, the water-repellent film 7 is disposed in one layer or a plurality of layers at and around the linear joint portion 8 that becomes the starting point of the two three-dimensional gather portions 4 and 5. This arrangement increases the thickness of the base of both gathers 4 and 5. Thereby, the rigidity which supports the standing property of both the gather parts 4 and 5 is acquired.

From the viewpoint of improving the above-mentioned leakage-proof property and stand-up property, and at the same time, softening the touch of the gather portion to reduce the damage to the skin, from the gather tip 43 of the inner three-dimensional gather portion 4 to the end portion 45 of the water repellent film 7 The distance (h ₁ ) and the distance (h ₂ ) from the gather tip 53 of the outer three-dimensional gather portion 5 to the fold line 55 of the water-repellent film 7 are both preferably 5 mm or more, more preferably 10 mm or more. preferable. The distance is preferably 25 mm or less, and more preferably 20 mm or less. From the same viewpoint, the sheet thickness of the water repellent film 7 is preferably 0.01 mm or more, and more preferably 0.015 mm or more. The sheet thickness is preferably 0.03 mm or less, and more preferably 0.025 mm or less. Further, it is particularly preferable that the distance is 10 mm or more and 20 mm or less and the sheet thickness is 0.015 mm or more and 0.025 or less.

  The elastic force of the elastic members 41 and 51 is determined by their thickness (dtex) and elongation rate (%). In particular, the elongation rate (%) is a value calculated from the formula of ((b−a) / a) × 100, where a is the length in the natural state and b is the length when expanded. It is. From the viewpoint of improving leakage prevention and standing, and at the same time, softening the touch of the gathered portion to reduce damage to the skin, the thickness (dtex) is preferably 310 dtex or more, and more preferably 470 dtex or more. Further, the thickness (dtex) is preferably 1240 dtex or less, and more preferably 940 dtex or less. The elongation percentage (%) is preferably 100% or more, and more preferably 150% or more. The elongation percentage (%) is preferably 300% or less, and more preferably 250% or less.

  Next, with reference to FIG. 5, the modification of arrangement | positioning of the water-repellent film 7 in this embodiment is demonstrated. (I) to (iii) of FIG. 5 are modified examples related to the outer three-dimensional gather portion 5, and (iv) to (vi) are modified examples related to the inner three-dimensional gather portion 4. (I) to (iii) and (iv) to (vi) in FIG. 5 can be arbitrarily combined. Also in these modified examples, it is preferable that the three-dimensional gathered portion forming sheet 6 and the water-repellent film 7 are not joined to the entire surface from the viewpoint of improving leakage prevention and standing property and simultaneously reducing the burden on the skin.

  In FIG. 5 (i), the folding line 55 of the water repellent film 7 in the outer three-dimensional gather portion 5 extends to the vicinity of the gather tip 53. Thereby, leak-proof property can be improved to the gather tip. On the other hand, the water repellent film 7 is disposed below the elastic member 51, that is, on the sheet portion 52 b side of the outer sheet laminated portion 52. Thereby, in the sheet | seat part 52a side which touches a collar part, the thickness of the laminated body of the water-repellent film 7 and the sheet | seat 6 is not made to feel on the skin, and the softness of the nonwoven fabric of the sheet | seat 6 is easy to be directly transmitted to skin. In addition, a fine gather can be formed without raising the contraction force of the elastic member 51 and can be firmly erected. Thereby, the above-mentioned leakage prevention and standing property and reduction of the burden on the skin can be achieved at the same time.

  In FIG. 5 (ii), the water-repellent film 7 is disposed up to the gather tip 53 of the outer three-dimensional gather portion 5, but contrary to (i), the upper side of the elastic member 51, that is, the outer sheet laminated portion 52. In this embodiment, the water repellent film 7 is disposed on the sheet portion 52a. In this case, the water repellent film 7 can more effectively suppress the propagation of the liquid to the skin via the sheet portion 52a. Further, the thick laminate of the sheet portion 52a of the outer sheet laminate portion 52 and the two layers of the water-repellent film 6 is easily brought into contact with the flange portion by being pushed up from below by the elastic member 51, and the elastic member contracts. Since the force can be distributed to the surface contact surface and transmitted to the skin, the fit is improved. In this case, inhibition of elastic body contraction due to an increase in the number of constituent materials is most likely to occur, but it can be easily dealt with by increasing the contraction force of the elastic member 51 in order to ensure standing. Increasing the contraction force can be realized by increasing (thickening) the dtex value of the elastic material, increasing the number of the elastic materials, and increasing the expansion ratio. On the other hand, even if the contraction force is slightly increased, the contraction force is dispersed as described above.

In FIG. 5 (iii), the folding line 55 of the water-repellent film 7 is disposed closer to the gather tip 53 side than the elastic member 51 of the outer three-dimensional gather portion 5, that is, the water-repellent film 7 entrains the elastic member 51. It is the form clamped by. Thereby, the water repellent film 7 covers all the inner surfaces of the outer three-dimensional gather part 5, and the leak-proof property is most enhanced.
Similarly to the form (ii), the laminated body having the thickness of the sheet portion 52a of the outer sheet laminated portion 52 and the water repellent film 6 is easily brought into contact with the collar portion in a planar shape by being pushed up from below by the elastic member 51. Since the contraction force of the elastic member can be distributed to the skin contact surface and transmitted to the skin, the fit is improved. In this case, the elastic body contraction is likely to be hindered due to an increase in the number of constituent materials, but it can be easily dealt with by increasing the contraction force of the elastic member 51 in order to ensure standing. Increasing the contraction force can be realized by increasing (thickening) the dtex value of the elastic material, increasing the number of the elastic materials, and increasing the expansion ratio. On the other hand, even if the contraction force is slightly increased, the contraction force is dispersed as described above.

  In addition, in this embodiment, the outer three-dimensional gather part 5 is comprised independently as a member different from the water-repellent film 7 and the sheet | seat 6 for three-dimensional gather part formation, respectively. Therefore, in the outer three-dimensional gathered portion 5 shown in FIGS. 5 (i) to (iii), the nonwoven fabric of the sheet 6 is not restricted by the water-repellent film 7 and is independent of the laminated member of the nonwoven fabric and the film. It is easy to make wrinkles, its softness is maintained, and the burden on the skin is reduced.

  In FIG. 5 (iv), the tip 45 of the water repellent film 7 in the inner three-dimensional gather portion 4 extends to the vicinity of the gather tip 45. In this embodiment, the water-repellent film 7 is disposed outside the elastic member 41 of the inner three-dimensional gather portion 4, that is, on the sheet portion 42 a side of the inner sheet laminated portion 42. Since the water-repellent film 7 is on the side of the sheet portion 42a that easily comes into contact with the inguinal portion of the wearer, the propagation of the liquid to the skin can be more effectively suppressed. In this case, the elastic body contraction is likely to be hindered due to an increase in the number of constituent materials, but it can be easily dealt with by increasing the contraction force of the elastic member 51 in order to ensure standing. Increasing the contraction force can be realized by increasing (thickening) the dtex value of the elastic material, increasing the number of the elastic materials, and increasing the expansion ratio. On the other hand, even if the contraction force is slightly increased, the contraction force is dispersed as described above.

  In FIG. 5 (v), contrary to (iv), the water-repellent film 7 is disposed on the inner side of the elastic member 41 of the inner three-dimensional gather portion 4, that is, on the sheet portion 42b side of the inner sheet laminated portion 42. It is a form. Thereby, leak-proof property can be improved to the gather tip. On the other hand, the water repellent film 7 is located below the elastic member 41, and the rigidity of the water repellent film 7 does not affect the portion in contact with the groin portion. Therefore, in the sheet part 42a in contact with the skin, the thickness of the laminated body of the water repellent film 7 and the sheet 6 is not felt on the skin, and the softness of the nonwoven fabric of the sheet 6 is easily transmitted directly. Further, without increasing the contraction force of the elastic member 41, it is possible to form a fine gather only with a soft nonwoven fabric and to stand firmly. Thereby, the above-mentioned leakage prevention and standing property and reduction of the burden on the skin can be achieved at the same time.

  In FIG. 5 (vi), the water-repellent film 7 is closer to the gather tip 43 side than the elastic member 41 of the inner three-dimensional gather portion 4, and the elastic member 41 is caught and sandwiched. In this case, the water-repellent film 7 covers the entire inner surface of the inner three-dimensional gather portion 4, and the leak-proof property is most enhanced. In this case, the elastic body contraction is likely to be hindered due to an increase in the number of constituent materials, but it can be easily dealt with by increasing the contraction force of the elastic member 51 in order to ensure standing. Increasing the contraction force can be realized by increasing (thickening) the dtex value of the elastic material, increasing the number of the elastic materials, and increasing the expansion ratio. On the other hand, even if the contraction force is slightly increased, the contraction force is dispersed as described above.

  In the present embodiment, the water-repellent film 7 and the three-dimensional gather portion forming sheet 6 constitute the inner three-dimensional gather portion 4 independently as separate members. Therefore, in the inner three-dimensional gathered portion 4 shown in FIGS. 5 (iv) to (vi), the nonwoven fabric of the sheet 6 is not restrained by the water-repellent film 7 and is independent from the laminate member of the nonwoven fabric and the film. It is easy to make wrinkles, its softness is maintained, and the burden on the skin is reduced.

  As long as the water-repellent film 7 is arranged continuously from the non-skin contact surface side of the absorbent core to the outer three-dimensional gathered portion 5 and the inner three-dimensional gathered portion 4, the absorbent article of the present invention is described above. It is not limited to the form. For example, one or both of the three-dimensional gathered portion forming sheet 6 and the water-repellent film 7 may be separate members from the outer nonwoven fabric sheet 34 and the back sheet 32. In this case, the three-dimensional gather portion forming sheet 6 and the water repellent film 7 are disposed on the left and right side edges of the absorbent main body 3, and one end thereof is fixed to the non-skin contact surface side of the absorbent core 33. It is formed. The position where the water repellent film 7 enters the absorbent core 33 can be arbitrarily set from the viewpoint of preventing liquid leakage. Further, the gathers 4 and 5 may be formed by using the solid gather portion forming sheet 6 as a continuous sheet material on the left and right sides of the absorbent main body 3, and two kinds of the three gather portion forming sheets 6 may be formed. Both gathers 4 and 5 may be formed and connected as a sheet material. Furthermore, in the present embodiment, the two gather portions 4 and 5 are formed with the three-dimensional gather portion forming sheet 6 as one layer. However, the present invention is not limited to this, and for example, the gather portion from a state where the sheet 6 is folded and doubled. You may do. In this case, the sheet lamination portions 42 and 52 are four-layer lamination portions. Moreover, the number of the elastic members 41 and 51 can also be set arbitrarily, and the position of the joint portion 9 of the inner three-dimensional gather portion 4 can also be set arbitrarily.

  In addition, another member, for example, the surface sheet 31 or the like may be joined to the linear joint portion 8 together. Further, the standing point 48 of the inner three-dimensional gather portion 4 and the rising point 58 of the outer three-dimensional gather portion may not be the same, but may be separately arranged. For example, the formation width of the linear joint portion 8 can be widened so that both side edges can be set as the rising point 48 and the rising point 58. Moreover, as shown in FIG. 6, it is also possible to provide separate joints to provide a completely separated upright point. The modification shown in FIG. 6 will be described below.

  In FIG. 6, the rising point 48 of the inner three-dimensional gather portion 4 is disposed on the skin contact surface side of the absorbent main body 3. Specifically, the standing point 48 is formed on the skin contact surface side of the topsheet 31 corresponding to the pair of grooves 33 c and 33 c included in the lower layer absorbent portion 33 b of the absorbent core 33. At this position, the three-dimensional gather portion forming sheet 6 and the water repellent film 7 are linearly joined to the top sheet 31 along the longitudinal direction (Y direction), and the inner three-dimensional gather portion 4 is formed so as to stand up from there. Has been. The groove 33c in the absorbent core 33 is a part where pulp fibers are removed or extremely reduced. Therefore, the thickness is thinner than other portions of the absorbent core 33 and the flexibility is excellent. When the standing point 48 is present at the position of the groove 33c, the expansion / contraction force of the elastic member 41 of the inner three-dimensional gather portion 4 is easily transmitted to the groove 33c. Thereby, even if it does not raise too much the contraction force of the elastic member 41 of the inner side three-dimensional gather part 4, the absorptive core 33 can fully be lifted. As a result, the inner three-dimensional gather portion 4 can improve the standing property while reducing the burden on the skin, and can absorb and hold the excrement firmly without being absorbed by the absorbent core 33. In addition, since a part of the absorbent core is arranged outward in the width direction of the inner three-dimensional gathers 4 and 4, the liquid leaking outward in the width direction is directly absorbed and retained, Leakage can be effectively prevented.

Next, a pants-type disposable diaper 90 according to a second embodiment of the present invention will be described with reference to FIG.
The pants-type disposable diaper 90 has a different exterior body from that of the first embodiment. The exterior body 92 of the diaper 90 is a continuous body in which the abdominal side F and the back side R are connected by a crotch C, as shown in FIG. The crotch C is narrower than the ventral side F and the back side R. That is, as a whole, the exterior body 92 has a vertically long shape in which the side portion is constricted at the crotch portion and the abdominal side portion F and the back side portion R are wide. The exterior body 92 also includes a waist elastic member 27 and a waist elastic member 28 arranged in the width direction between the two layers of nonwoven fabric sheets 92a and 92b. On the skin contact surface side of the exterior body 92, the absorbent main body 3 is disposed across the crotch portion C and extending to the abdominal side F and the back side R. Also in the diaper 90, both side edges of the ventral side F of the exterior body 92 and both side edges of the back side R are joined to form a waist opening 12 and a pair of undercarriage openings 13, 13 to form a pants type. A disposable diaper 90 is formed.

  The absorbent main body 3 used in the second embodiment is the same as that of the first embodiment. That is, the outer three-dimensional gathered portion 5 and the inner three-dimensional gathered portion in which the three-dimensional gathered portion forming sheet 6 and the water repellent film 7 extend from the non-skin contact surface side of the absorbent core 33 and sandwich the elastic members 51 and 41. 4 is formed. Thereby, the leak-proof property and standing property of both the gather parts 4 and 5 are improved, and the contact with skin is soft, and a load is reduced. In addition, the various forms described in the first embodiment can be arbitrarily applied, and considering that the exterior body 92 of the second embodiment is arranged up to the crotch C, the absorbent main body 3 is an outer nonwoven fabric. It is preferable that the three-dimensional gather portion forming sheet 6 is made of an independent member without the sheet 34.

  Next, the preferable form of the manufacturing method of the absorbent article which concerns on this invention is demonstrated with reference to FIG. In FIG. 8, the process of forming the inner three-dimensional gather part 4 and the outer three-dimensional gather part 5 is shown. FIG. 8 shows a cross section along a direction (CD: Cross Direction) perpendicular to the machine direction or the conveyance direction (MD). Moreover, in this manufacturing method, since the three-dimensional gather part forming sheet 6 described in the first embodiment is premised on the configuration including the outer envelope nonwoven fabric sheet 34 and the water-repellent film 7 including the back sheet 32, the absorbency The process in which the main body and the two three-dimensional gather portions 4 and 5 are integrally formed is shown. On the other hand, when the three-dimensional gather portion forming sheet 6 and the water repellent film 7 different from those in the first embodiment are separate members from the absorbent main body 3, the right and left three-dimensional gather portions 4 and 5 are separated from separate members. Will be formed. In either case, the inner three-dimensional gather portion 4 and the outer three-dimensional gather portion 5 are formed through the steps described below.

  As shown in FIG. 8A, a nonwoven fabric continuous sheet (a continuous sheet for forming a three-dimensional gather portion) 600 is conveyed along the MD. The nonwoven fabric continuous sheet 600 to be transported is folded into a V-shape starting from a gathered tip end position 530 of the outer three-dimensional gathered portion 5 before laminating a water-repellent continuous sheet 700 to be described later, and the nonwoven fabric continuous at the folded portion. The sheet 600 is opened so as not to touch each other. The elastic member 51 is arranged in a stretched state along the conveyance direction (MD) at a gathered tip expected position 530 where the nonwoven fabric continuous sheet 600 is folded. At the same time or before and after this, the elastic member 41 is put on the gather tip end position 430 of the inner three-dimensional gather portion near the sheet side edge in the width direction outside the gather tip end position 530 of the outer three-dimensional gather portion 5. It arrange | positions in an expansion | extension state along a conveyance direction (MD). The aforementioned gather tip planned position 430 and gather tip planned position 530 are appropriately set in consideration of the standing height of the inner three-dimensional gather portion 4 and the position of the linear joint portion 8 (standing points 48 to 58).

  Next, the water repellent continuous sheet 700 is arranged so as not to reach the elastic member 41 between the gathered tip expected positions 430 and 430 with respect to the arrangement surface of the elastic member in the nonwoven fabric continuous sheet 600. That is, the width direction inner side of the gather front end position 430 of the inner three-dimensional gather portion 4 is covered with the water-repellent continuous sheet 700 while the gathered front end position 530 of the nonwoven fabric continuous sheet 600 is not closed. .

  Then, the absorptive core 33 and the surface sheet continuous body 310 are mounted. In this case, the center in the width direction of the absorbent core 33 and the center in the width direction of the continuous surface sheet 310 are aligned with the center line CL in the width direction (CD) of the water repellent continuous sheet 700. Further, the continuous surface sheet 310 is further wound down to the side edge and the lower surface side of the absorbent core 33 following the upper surface side of the absorbent core 33, and between the absorbent core 33 and the water repellent continuous sheet 700. Bonded and fixed. Thereby, the continuous body 300 of an absorptive main body is formed. Note that the step of placing the absorbent core 33 and the topsheet continuous body 310 described above may be performed before or simultaneously with the step of placing the elastic members 41 and 51, or may be performed after the valley folding step described below or after joining and fixing. Can be done at any stage.

  Next, as shown in FIG. 8 (b), the nonwoven fabric continuous sheet 600 in a state of being folded and opened in advance in the above-described step, starts from the gather tip end position 530 and starts along the conveying direction (MD). The water-repellent continuous sheet 700 is partially sandwiched and joined together with the elastic member 51 to close the fold, thereby forming an outer sheet laminated portion continuous body 520 as shown in FIG. 8C. The joint portion at this time is a linear joint portion 800, and is a subsequent linear joint portion 8 (standing points 48 to 58).

  Next, as shown in FIG. 8 (d), the nonwoven fabric continuous sheet 600 is partially folded along the conveyance direction (MD) starting from the gathered tip expected position 430 of the inner three-dimensional gather portion, and the folded portion is The end portion of the water repellent continuous sheet 700 is sandwiched and joined together with the elastic member 41 to form the inner sheet laminated portion continuous body 420. The joint portion at this time is the joint portion 900, and the joint portion 9 of the rear inner three-dimensional gather portion 4.

  Next, as illustrated in FIG. 8E, the inner sheet laminated portion continuous body 420 is folded back inward in the width direction (CD) with the linear joint portion 800 as an axis. Thereby, the outer side sheet lamination | stacking part continuous body 520 rotates to the outward of the width direction (CD). From this state, although not shown, the inner sheet laminated part continuous body 420 is bonded and fixed to the upper surface of the absorbent main body continuous body 300 at the end of the absorbent core 33 in the conveying direction (MD) and the outside thereof, and each absorption A large number of absorbent main bodies 3, 3... Having three-dimensional gather portions 4 and 5 are obtained by cutting the unit length of the main body 3.

  Although not shown, the absorbent main body 3 obtained in this way is directed in a direction (CD) perpendicular to the transport direction by rotating its longitudinal direction by 90 °. Subsequently, the absorptive main body 3 is mounted on one surface side of the continuous body of the exterior body manufactured in a separate process. Next, the outer package is folded in two in the CD direction, the side edges are joined, cut at predetermined locations, etc. to obtain a large number of pants-type disposable diapers. At that time, in the case of the diaper 10 of the first embodiment, the abdominal band continuum 210 and the back band continuum 220 manufactured in separate steps are transported apart in the CD direction, and the three-dimensional gathers 4 and 5 are interposed therebetween. It fixes so that the provided absorptive main body 3 may be bridged. Next, the ventral belt continuum 210 and the backband continuum 220 are folded in half so as to overlap, the side seal portion planned positions are joined, and cut into unit lengths to obtain a large number of disposable diapers 10. On the other hand, in the case of the diaper 90 of the second embodiment, the outer body continuum 920 manufactured in a separate process is cut out at a position to be the underbody opening 13 to form a long elliptical opening in the CD, A position sandwiched between the openings becomes a narrow crotch part planned portion. At the same time, the longitudinal direction of the absorbent main body 3 including the three-dimensional gather portions 4 and 5 is directed to the CD, and fixed to the planned crotch portion of the exterior body continuous body 920. Next, it is folded in two in the CD direction, the side seal portion planned positions are joined, and cut into unit lengths to obtain a large number of disposable diapers 90.

  In the above manufacturing method, by adjusting the arrangement of the water-repellent continuous sheet 700 and the depth of valley folds at the gathered tip planned positions 430 and 530, the inner sheet stacking portion 42 and the outer sheet stacking portion 53 are moved between the sheet layers. The water repellent film 7 can be accurately set. Thereby, the leak-proof property and the standing property are enhanced, and at the same time, the softness of the gathered portion is maintained and the burden on the skin can be reduced.

  Next, the preferable formation raw material of the member which comprises the diaper 10 and the diaper 90 is demonstrated. As a material for forming the top sheet 31, the back sheet 32 or the water-repellent film 7, the absorbent core 33, the outer nonwoven fabric sheet 34 or the three-dimensional gather portion forming sheet 6, and the annular exterior body 2 or the exterior body 92, this kind of article is used. What is employ | adopted for can be used without a restriction | limiting in particular.

  For example, the surface sheet 31 is preferably a hydrophilic thermal bond nonwoven fabric from the viewpoint of promptly absorbing excreted bodily fluid and transmitting it to the absorbent body and from the viewpoint of good touch, and particularly preferably an air-through nonwoven fabric. The top sheet 31 is preferably a thermoplastic resin fiber that has been subjected to a hydrophilic treatment, and the fiber is a fiber that has undergone a three-dimensional crimp such as a secondary crimp or a tertiary crimp. Specifically, polyethylene, polypropylene, polyester, nylon, and composite fibers thereof are prepared, and various hydrophilizing agents are applied at a stage before cutting into a predetermined length to form staples. Hydrophilic agents include various alkyl sulfonates represented by α-olefin sulfonates, acrylates, acrylate / acrylamide copolymers, ester amides, ester amide salts, polyethylene glycol and derivatives thereof, water-soluble Hydrophilic treatment with a hydrophilizing agent known to those skilled in the art, such as a reactive polyester resin, various silicone derivatives, various sugar derivatives, and mixtures thereof, can be used.

  The back sheet 32 or the water repellent film 7 is not particularly limited as long as it prevents liquid permeation and has moisture permeability. For example, a minute inorganic filler composed of a hydrophobic thermoplastic resin and calcium carbonate or the like is compatible. Examples thereof include a porous film obtained by melt-kneading an organic polymer or the like without a film to form a film, and uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination. Moreover, in the urine collection pad etc. which are inserted and used in another diaper, the back surface sheet 33 may have liquid permeability.

  The absorbent core 33 is a mixture of hydrophilic fibers and superabsorbent polymer particles, or a mixture of hydrophilic fibers, superabsorbent polymer particles and thermoplastic synthetic resin fibers, or a mixture of a plurality of fiber sheets. A water-absorbent sheet in which water-absorbing polymer particles are sandwiched, and is compressed to a required thickness. As the hydrophilic fiber, a fiber having a hydrophilic surface can be used. Examples of the hydrophilic fiber include cellulose fibers and synthetic fibers that are hydrophilically treated with a surfactant or the like as required. The absorbent core 33 may be entirely covered with a liquid-permeable sheet such as tissue paper or a hydrophilic fiber nonwoven fabric in order to prevent its shape loss and dropping of the polymer particles. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.

  The outer envelope nonwoven fabric sheet 34 or the three-dimensional gather portion forming sheet 6 is preferably a water-repellent nonwoven fabric, such as a nonwoven fabric produced by a card method, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a spunlace nonwoven fabric, a heat roll nonwoven fabric, or a needle punch nonwoven fabric. Water-repellent materials or various non-woven fabrics subjected to water-repellent treatment can be used. Particularly preferably, for example, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used.

The material of the inner layer sheet 23 and the outer layer sheet 24 in the annular outer package 2 (abdominal side band 21 and back side band 22) used in the diaper 10 of the first embodiment is substantially water-repellent and has water vapor permeability. If it is, what is generally used for this kind of goods can be used conveniently. This also applies to the exterior body 92 used in the diaper 90 of the second embodiment.
Examples of the outer layer sheet 24 include non-woven fabrics, woven fabrics, knitted fabrics, resin films, and the like produced by various manufacturing methods such as air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric. The sheet material etc. which can be used can be used. For the inner layer sheet 23, the same sheet material as the outer layer sheet 24 can be used. Further, either one or both of the inner layer sheet 23 and the outer layer sheet 24 may be made of a stretchable sheet material. Examples of the stretchable sheet include a sheet in which a stretchable film is sandwiched between two sheet materials, and a nonwoven fabric composed of stretchable elastomer fibers such as polyurethane.

  The elastic members 41 and 51 arranged in the waist elastic member 27, the waist elastic member 28, and the three-dimensional gather portions 4 and 5 can use ordinary elastic materials used in absorbent articles, and may be the same material. Different materials and thicknesses are acceptable.

  The absorbent article of the present invention can be applied to a tape-type disposable diaper, a urine pad, a sanitary napkin, an incontinence pad, an incontinence liner, etc., in addition to the pants-type disposable diaper of the above embodiment.

  This invention discloses the following absorbent articles and its manufacturing method further regarding embodiment mentioned above.

<1> It has a vertically long absorbent main body including an absorbent core, an inner three-dimensional gathered portion disposed on both sides of the absorbent main body, and an outer three-dimensional gathered portion located outward in the width direction from the inner three-dimensional gathered portion. And an absorbent article divided into a ventral part, a crotch part and a dorsal part,
An absorbent article in which a water-repellent film is continuously arranged from the non-skin contact surface side of the absorbent core to the outer three-dimensional gathered portion and the inner three-dimensional gathered portion.

<2> The absorbent main body has a liquid-permeable top sheet, a liquid-permeable or water-repellent back sheet, and a liquid-retaining absorbent core interposed between both sheets. Absorbent article.
<3> The absorbent article according to <2>, wherein the back sheet uses a water-repellent film.
<4> The water-repellent film constituting the back sheet is continuously disposed from the non-skin contact surface side of the absorbent core to the outer solid gather portion and the inner solid gather portion <3>. The absorbent article as described.
<5> The outer three-dimensional gathered portion and the inner three-dimensional gathered portion are elastic members and the water-repellent film between the respective sheet layers of the outer sheet laminated portion and the inner sheet laminated portion formed by partially folding a sheet for forming a three-dimensional gathered portion. Sandwiched
The water-repellent film covers a surface of the outer three-dimensional gathered portion and the inner three-dimensional gathered portion facing the absorbent main body, and at least one of the outer sheet laminated portion and the inner sheet laminated portion. The absorbent article according to any one of <1> to <4>, which is sandwiched in a folded state.
<6> The absorbent article according to any one of <1> to <5>, wherein each of the inner three-dimensional gather portion and the outer three-dimensional gather portion has an elastic member arranged in an expanded state.
<7> The absorbent article according to <6>, wherein the stretched state of the elastic member is a state in which the abdomen, the crotch part, and the dorsal part are stretched in a state where the absorbent article is deployed.
<8> A back sheet is disposed on the non-skin contact surface side of the absorbent core, the back sheet is made of a water repellent film, and the water repellent film is from the non skin contact surface side of the absorbent core. Any one of <1> to <7>, which reaches the outer solid gather portion on the outer side in the width direction and continuously folds back from the outer solid gather portion to the inner solid gather portion on the inner side in the width direction The absorbent article of Claim 1.
<9> The outer three-dimensional gather portion is formed by folding a sheet for forming a three-dimensional gather portion, which is a forming member, and joining the end portions of the two-folded portions with linear joint portions along the longitudinal direction. The absorbent article according to any one of <1> to <8>, comprising an outer sheet laminated portion.
<10> The absorbent article according to any one of <1> to <9>, wherein the water-repellent film is folded in two along a folding line in the outer three-dimensional gathered portion.
<11> The absorbent article according to <10>, wherein the water-repellent film folded in half is in a bag shape with the linear joint portion as a closed mouth inside the outer sheet laminated portion.
<12> In the outer three-dimensional gather section, the three-dimensional gather section forming sheet that is this forming member is folded in two, and the end of the two-fold section is joined by a linear joint section along the longitudinal direction,
The absorbent article according to any one of <1> to <11>, wherein the standing of the outer three-dimensional gather portion is a standing toward the outer side in the width direction of the absorbent main body with the linear joint portion as a rising point. .
<13> In the outer three-dimensional gather portion, the three-dimensional gather portion forming sheet as the forming member is folded in two, and the end of the two-fold portion is joined by a linear joint portion along the longitudinal direction,
The inner three-dimensional gather part is folded in two along the crease line where the end of the three-dimensional gather part forming sheet beyond the linear joint is the gather tip of the inner three-dimensional gather part. The absorbent article according to any one of <1> to <12>, comprising a bag-shaped inner sheet laminated portion having the gather tip.
<14> The inner three-dimensional gather portion includes an inner sheet laminated portion formed by partially folding a three-dimensional gather portion forming sheet that is the forming member, and the inner sheet from an upright point that is a base of the inner three-dimensional gather portion. The absorbent article according to any one of <1> to <13>, wherein the water-repellent film covers the laminated portion without any gap.
<15> In the outer three-dimensional gathered portion, the three-dimensional gathered portion forming sheet as the forming member is folded in two, and the end of the two-folded portion is joined by a linear joined portion along the longitudinal direction,
The absorbent article according to any one of <1> to <14>, wherein the standing of the inner three-dimensional gathered portion is a standing up toward the upper side of the top sheet with the linear joint portion as a rising point.
<16> The absorbent article according to any one of <1> to <15>, wherein a rising point of the inner three-dimensional gather portion is provided outward in the width direction of the absorbent core.
<17> A sheet for forming a three-dimensional gather portion, which is a forming member of the inner three-dimensional gather portion, and the water repellent film on the skin contact surface side of the absorbent core and the longitudinal direction of the absorbent article The absorbent article according to any one of <1> to <16>, wherein the inner three-dimensional gather portion is formed so as to be linearly joined along and to stand up from there.
<18> The absorbent core has a pair of grooves along the longitudinal direction of the absorbent article, a surface sheet is disposed on the skin contact surface side of the absorbent core, and the absorbent core corresponds to the grooves. On the skin contact surface side of the surface sheet, the sheet for forming a three-dimensional gather portion and the water repellent film are joined in a line along the longitudinal direction of the surface sheet and the absorbent article <1> to <17. > The absorbent article of any one of>.
<19> The absorbent core has a pair of grooves along the longitudinal direction of the absorbent article, and the standing point of the inner three-dimensional gathered portion is arranged at a position on the skin contact surface side corresponding to the grooves. The absorbent article according to any one of <1> to <18>.
<20> The absorbent article according to any one of <1> to <19>, wherein the water-repellent film is arranged so as not to reach a gather tip of the inner three-dimensional gather portion and the outer three-dimensional gather portion. .
<21> Any one of <1> to <20>, wherein the water-repellent film is arranged in front of the elastic member at the gather tip of the inner three-dimensional gather portion and the outer three-dimensional gather portion. Absorbent article according to item.
<22> The three-dimensional gather which consists of the extension part of the back surface sheet | seat distribute | arranged to the non-skin contact surface side of the said absorptive core, and the said water-repellent film is a formation member of the said inner three-dimensional gather part and the said outer three-dimensional gather part The absorbent article according to any one of <1> to <21>, wherein the part forming sheet is an extended portion of an outer nonwoven fabric sheet disposed on the non-skin contact surface side of the back sheet.
<23> The water-repellent film seamlessly covers the surface facing the absorbent main body and the non-skin contact surface side of the absorbent core in the inner three-dimensional gathered portion and the outer three-dimensional gathered portion <1>. The absorbent article according to any one of to <22>.
<24> The absorbent article according to any one of <1> to <23>, wherein the water-repellent film forms a leak-proof wall with respect to a side portion of the absorbent core.
<25> The absorption according to any one of <1> to <24>, wherein the three-dimensional gather portion forming sheet, which is a forming member of the inner three-dimensional gather portion and the outer three-dimensional gather portion, uses a water-repellent nonwoven fabric. Sex goods.
<26> The absorbent article is a pants-type absorbent article, and includes an abdominal band forming the abdomen and a dorsal band forming the dorsal part, and the abdominal band and the dorsal band are exterior bodies. None, a crotch part is formed by bridging the absorbent main body between the ventral band and the dorsal band, and both side edges of the ventral band and the dorsal band are joined to form a waistline opening and a pair of legs The absorbent article according to any one of <1> to <25>, in which a circumferential opening is formed.
<27> The absorbent article is a pants-type absorbent article, and the crotch part is constricted, and the abdomen side part and the back side part are widened on the skin contact surface side of the vertically long exterior body. An absorbent main body is disposed, and both side edges of the abdomen and the dorsal side of the exterior body are joined to form a waistline opening and a pair of suspension openings <1> to < The absorbent article according to any one of 25>.
<28> The absorptivity according to <26>, wherein the abdominal band and the back band constituting the exterior body include one or more inner layer sheets on the wearer skin surface side and an outer layer sheet on the wearer non-skin surface side. Goods.
<29> The absorbent article according to <28>, wherein the ventral band and the back band form an annular exterior body and constitute a waistline portion of the pant-type absorbent article.
<30> The absorbent article according to any one of <1> to <29>, wherein the water-repellent film is a porous film that is hardly liquid permeable and has water vapor permeability.
<31> The method for producing an absorbent article according to any one of <1> to <30>,
The three-dimensional gathered portion forming continuous sheet is valley-folded along the conveying direction from the gathered tip position of the outer three-dimensional gathered portion of the three-dimensional gathered portion forming continuous sheet, and the outer three-dimensional gathered portion is gathered. Elastic members are respectively arranged along the transport direction at the planned leading end position and the planned gathering tip position of the inner three-dimensional gathered portion in the vicinity of the sheet side edge outside in the width direction of the outer gathered tip position of the outer three-dimensional gathered portion. Process,
A step of covering the inner side of the inner three-dimensional gather portion with the water-repellent continuous sheet in the width direction from the gathered tip position of the inner three-dimensional gather portion with respect to the surface on which the elastic member of the three-dimensional gather portion forming continuous sheet is disposed
Sandwiching the water-repellent continuous sheet together with the elastic member at the valley fold, and joining at a linear joining portion to form the outer sheet laminated portion continuum;
The continuous sheet for forming the three-dimensional gathered portion is folded back along the conveying direction starting from the gathered tip end position of the inner three-dimensional gathered portion, and the end portion of the water-repellent sheet is sandwiched and joined to the folded portion together with the elastic member. Forming the inner sheet laminated part continuum;
The manufacturing method of an absorbent article provided with the process of turning back the said inner side sheet laminated part continuous body in the width direction inner side from the said linear junction part.

2 Annular exterior 3 Absorbent main body 31 Top sheet 32 Back sheet 33 Absorbent core 4 Inner three-dimensional gather part 41 Elastic member 42 Inner sheet laminated part 43 Gather tip 5 Outer three-dimensional gather part 51 Elastic member 52 Outer sheet laminated part 53 Gather tip 6 Three-dimensional gather forming sheet 7 Water repellent film 8 Linear joint 10, 90 Pants-type disposable diaper 92 Exterior body 420 Inner sheet laminated part continuous body 520 Outer sheet laminated part continuous body 600 Continuous sheet 700 for forming three-dimensional gathers Water repellent continuous Sheet

Claims (9)

A vertically long absorbent main body including an absorbent core, an inner three-dimensional gathered portion disposed on both sides of the absorbent main body, and an outer three-dimensional gathered portion located outward in the width direction from the inner three-dimensional gathered portion; An absorbent article divided into a side part, a crotch part and a back side part,
From the non-skin contact surface side of the absorbent core, the water-repellent film is continuously arranged over the outer three-dimensional gathered portion and the inner three-dimensional gathered portion ,
The outer three-dimensional gathered portion and the inner three-dimensional gathered portion sandwich the elastic member and the water-repellent film between the sheet layers of the outer sheet laminated portion and the inner sheet laminated portion formed by partially folding the sheet for forming the three-dimensional gathered portion. And
The water-repellent film is an absorbent article that covers a side of the outer three-dimensional gathered portion and the inner three-dimensional gathered portion facing the absorbent main body . The absorbent article of prior woodwasp aqueous film before Kisotogawa sheet stacking section and the claim 1 is sandwiched with at least one being one in clamshell said inner sheet stacking unit.   The absorbent article of Claim 1 or 2 with which the standing point of the said inside solid gather part is provided in the width direction outer side of the said absorbent core.   The said absorptive core has a pair of groove part along the longitudinal direction of the said absorbent article, The standing point of the said inside solid gather part is distribute | arranged to the position of the skin contact surface side corresponding to this groove part. Item 3. An absorbent article according to item 1 or 2.   The absorbent article according to any one of claims 1 to 4, wherein the water-repellent film is arranged so as not to reach a gather tip of the inner three-dimensional gathered portion and the outer three-dimensional gathered portion.   For forming a three-dimensional gathered portion, which is a member forming the inner three-dimensional gathered portion and the outer three-dimensional gathered portion, wherein the water-repellent film comprises an extended portion of a back sheet disposed on the non-skin contact surface side of the absorbent core The absorbent article according to any one of claims 1 to 5, wherein the sheet comprises an extended portion of an outer nonwoven fabric sheet disposed on the non-skin contact surface side of the back sheet.   The absorbent article is a pants-type absorbent article, and has an abdominal side band forming the abdominal side part and a back side band forming the back side part, and the abdominal side band and the back side band form an exterior body, A crotch part is formed by bridging the absorbent main body between the ventral band and the dorsal band, and both side edges of the ventral band and the dorsal band are joined to form a waist opening and a pair of leg openings The absorbent article according to any one of claims 1 to 6, wherein is formed.   The absorbent article is a pant-type absorbent article, and the absorbent main body is on the skin contact surface side of a vertically long exterior body in which the crotch part is constricted and the abdomen side part and the back side part are wide. The both sides of the abdomen and the back of the exterior body are joined to form a waist opening and a pair of suspension openings. The absorbent article according to item 1. It is a manufacturing method of an absorptive article given in any 1 paragraph of the above-mentioned claims,
The three-dimensional gathered portion forming continuous sheet is valley-folded along the conveying direction from the gathered tip position of the outer three-dimensional gathered portion of the three-dimensional gathered portion forming continuous sheet, and the outer three-dimensional gathered portion is gathered. Elastic members are respectively arranged along the transport direction at the planned leading end position and the planned gathering tip position of the inner three-dimensional gathered portion in the vicinity of the sheet side edge outside in the width direction of the outer gathered tip position of the outer three-dimensional gathered portion. Process,
A step of covering the inner side in the width direction with a water repellent continuous sheet with respect to the gather tip end position of the inner three-dimensional gather portion with respect to the surface on which the elastic member of the continuous sheet for forming the three-dimensional gather portion is disposed,
Wherein with the elastic member to sandwich the water-repellent continuous sheet, are joined in a linear junction with the valley fold portions, and forming an outer side sheet laminated part continuous body,
The continuous sheet for forming the three-dimensional gathered portion is folded back along the conveying direction starting from the gathered tip end position of the inner three-dimensional gathered portion, and the end portion of the water-repellent continuous sheet is sandwiched and joined to the folded portion together with the elastic member. and a step of forming the inner side sheet laminated part continuous body,
The manufacturing method of an absorbent article provided with the process of turning back the said inner side sheet laminated part continuous body in the width direction inner side from the said linear junction part.

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