JP5155839B2 - Absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention relates to an absorbent article such as a disposable diaper and a method for producing the same.

  Absorbent articles such as disposable diapers generally include a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorbent body interposed between the two sheets. A liquid-retaining absorbent core and a core wrap sheet that wraps the absorbent core. For example, in Patent Documents 1 and 2, a mount (core wrap sheet) disposed on the back side of an absorbent main body is directed outward from the left and right side edges of the absorbent main body. The extending portion is folded back inward, and the left and right side edges of the mount are disposed on the left and right side edges on the surface side of the absorbent body. A technique is described in which an adhesive or a liquid permeation suppression means is provided in the overlapping part of the mount in the part. According to the techniques described in Patent Documents 1 and 2, it is said that an absorbent article having excellent leakage prevention properties and high productivity can be obtained.

  Further, in Patent Document 3, in a so-called unfolded disposable diaper provided with a fastening tape, a plurality of thread-like elastic bodies are bonded and fixed at predetermined intervals on one surface of a sheet for the purpose of improving the adhesion of the diaper when worn. A technique is described in which a laminated sheet piece is attached to a waist end of a diaper back side where a fastening tape is arranged and a waist end and a waistline part of a diaper abdomen side in an extended state. Yes. Further, in Patent Document 3, as a method for efficiently producing a disposable diaper having such a configuration, a continuous body in which a plurality of diapers are continuous in a longitudinal direction is traveled, and a fastening tape is provided at predetermined portions on both side edges of the traveling continuous body. Is attached in the stretched state so as to straddle the boundary line between two adjacent diapers in the vicinity of the fastening tape in the running continuum. A manufacturing method for cutting a continuum at a boundary line is described. According to this manufacturing method, of the laminated sheet pieces separated into two at the boundary line, the portion located closer to the fastening tape than the boundary line at the time of cutting is the back side part of one of the separated diapers The other parts of the laminating sheet pieces function as waist gathers and torso fit gathers on the ventral side of the other separated diaper. It is said that it becomes possible to manufacture a diaper excellent in adhesion to the garment at high speed.

JP 2000-342622 A JP 2000-342627 A JP-A-10-118116

  In conventional disposable diapers, bodily fluids such as urine once absorbed in the absorbent body ooze out from the end of the absorbent body due to body pressure when wearing the diaper, etc. There was a problem that urine leakage occurred. In particular, the ventral part of the diaper or the vicinity thereof has a urination point for directly receiving the excreted urine, so that urine leakage is likely to occur. A disposable diaper that is excellent in the effect of preventing urine leakage in the ventral part and the dorsal part and that can be manufactured at high speed has not yet been provided.

  Accordingly, an object of the present invention is to provide an absorbent article excellent in the effect of preventing urine leakage and capable of high-speed production, and a method for producing the same.

  The present invention includes a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorbent body interposed between the two sheets, and is substantially vertically long and has a ventral side portion, a crotch portion, and a back portion. The absorbent article has a side part in the longitudinal direction, and the absorbent body has a liquid-retaining absorbent core and a core wrap sheet that wraps the absorbent core, the abdominal side part or the back side part In addition, there is an absorbent material non-arrangement region where the absorbent core and the core wrap sheet are not arranged over the entire length in the width direction of the absorbent article, and the absorbent material non-arrangement region is sandwiched between Outside the longitudinal direction of the absorbent article, there is a core wrap sheet single arrangement region in which the absorbent core is not disposed and the core wrap sheet is disposed, and the longitudinal direction inward of the absorbent article The absorber exists in the absorber material non-arranged region, A sheet covering the skin contact surface side of the collector and a sheet covering the non-skin contact surface side of the absorber are extended, and between the sheets in the absorber material non-arrangement region The above-mentioned object is achieved by providing an absorbent article that has been bonded and bonded.

  The present invention also relates to a method for producing the absorbent article, wherein the belt-shaped topsheet forming the topsheet is fed in a predetermined direction, and the strip-shaped backsheet original forming the backsheet is converted to the topsheet. A plurality of absorbent bodies configured to include an absorbent core wrapped with a core wrap sheet at the joining portion while feeding the top sheet raw sheet and the back sheet original sheet so as to overlap with the original sheet Continuous at a constant feeding interval, the surface sheet original fabric and the back sheet original fabric are joined with the absorbent body sandwiched, and a continuous body in which a plurality of absorbent articles are continuous in the longitudinal direction is obtained. A body forming step, and a cutting step of cutting the continuous body at a boundary line between two adjacent absorbent articles extending in the width direction of the continuous body, and the core wrap sheet includes the absorbent article Longitudinal length less than or equal to the total length in the longitudinal direction And having an extending portion extending outward in the longitudinal direction from one longitudinal end portion of the absorbent core, and in the continuous body forming step, each of the absorbent bodies is extended by the core wrap sheet. The object was achieved by providing a method for manufacturing an absorbent article that is arranged between the top sheet original fabric and the back sheet original fabric so that the protruding portion straddles the boundary line in the extending direction. Is.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which is excellent in the urine leak prevention effect and can be manufactured at high-speed can be provided.

  Hereinafter, first, the absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings. FIG. 1 is a plan view on the skin contact surface side schematically showing a state in which the disposable diaper according to the present embodiment is expanded in a flat shape by extending the elastic members of each part, and FIG. 2 is a line II of FIG. FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. The disposable diaper 1 of this embodiment is a liquid-permeable surface sheet 2 that forms a skin contact surface, and a liquid-impermeable back sheet 3 that forms a non-skin contact surface, as shown in FIGS. And a liquid-retaining absorbent 4 disposed between the two sheets 2 and 3, and is formed substantially vertically long. The diaper 1 has the back side part A, the abdominal side part B, and the crotch part C located between these in the longitudinal direction. The back side part A is a part located on the wearer's back side, the abdomen part B is a part located on the wearer's belly side, and the crotch part C is a part located on the wearer's crotch. The crotch part C is located at the center in the longitudinal direction of the diaper 1.

  In addition, in this specification, a skin contact surface is a surface turned to a wearer's skin side at the time of wear in an absorbent article and its structural member, and a non-skin contact surface in an absorbent article and its structural member It is a surface that is directed to the side opposite to the wearer's skin when worn. Moreover, a longitudinal direction is a direction along the long side of an absorbent article or its structural member, and a width direction is a direction orthogonal to this longitudinal direction.

  The diaper 1 has an hourglass shape in which both side edges of the crotch part C are curved inwardly in an arc shape, and the central portion in the longitudinal direction is bound inward as a whole. The top sheet 2 has a substantially rectangular plan view shape having an outer dimension larger than that of the absorbent body 4 (the absorbent core 5 wrapped with the core wrap sheet 6), and is formed at the center in the width direction of the back sheet 3. It is arranged. The back sheet 3 has an hourglass-like outer shape that matches the outer shape of the diaper. The top sheet 2 and the back sheet 3 respectively extend outward from the longitudinal end portions 5a and 5b and the width direction both side edges 5c and 5c of the absorbent core 5, either directly or at the extending portions thereof. The other members are joined to each other. The absorbent body 4 has a rectangular shape in plan view, and is arranged at the center in the width direction of the diaper 1 with its longitudinal direction coinciding with the longitudinal direction of the diaper 1. The absorbent body 4 (core wrap sheet 6), the top sheet 2 and the back sheet 3 are joined to each other at a predetermined site by an adhesive such as a hot melt adhesive.

  A pair of fastening tapes 10, 10 are provided on the left and right edges of the back side A. More specifically, side flaps that extend outward in the width direction from both side edges in the width direction of the absorbent body 4 are formed on both side portions of the back side portion A, and fastening tape is provided on each side flap. 10 is attached to extend outward in the width direction. A hook member of a mechanical fastener is attached to the fastening tape 10. A landing tape (not shown) for fastening the fastening tape 10 is attached to the outer surface (non-skin contact surface) of the abdominal side B. The landing tape is composed of a base material sheet and a loop material bonded to the base material sheet. Note that side flaps extending outward in the width direction are also formed on both sides of the ventral side B.

  The absorbent body 4 includes a liquid-retaining absorbent core 5 and two liquid-permeable core wrap sheets 6 that wrap the absorbent core 5. The absorbent core 5 has a rectangular shape in plan view, and has the same shape (rectangular shape) as the absorbent core 5, and has two core wrap sheets 6 that are larger in size than the absorbent core 5. Is sandwiched between. Thus, the entire area of the absorbent core 5 on the skin contact surface side and the non-skin contact surface side is covered with the core wrap sheet 6. Between the absorptive core 5 and the core wrap sheet | seat 6, you may join by adhesives, such as a hot-melt-adhesive agent, in a predetermined part. In that case, from the viewpoint of efficiently infiltrating the liquid from the core wrap sheet to the absorbent core, the adhesive application pattern is not a so-called solid coating in which the adhesive is uniformly applied to the surface to be applied, for example, a spiral pattern. An application pattern in which the application part and the non-application part of the adhesive are dispersedly arranged on the application surface is preferable.

  In the present embodiment, there is an absorbent material non-arranged region 30 in which the absorbent core 5 and the core wrap sheet 6 are not disposed over the entire length in the width direction of the diaper 1 on the ventral side B, There is a core wrap sheet single arrangement region 20 in which the absorbent core 5 is not disposed and the core wrap sheet 6 is disposed outside the diaper 1 in the longitudinal direction across the absorbent material non-arrangement region 30; The absorbent body 4 exists inside the diaper 1 in the longitudinal direction.

  More specifically, as shown in FIG. 1, the absorbent core 5 has a crotch C in the widthwise direction centered longitudinally in the longitudinal direction of the diaper 1 and directed toward the back side A and the abdominal side B, respectively. The both ends 5a, 5b in the longitudinal direction do not reach the waist ends 1a, 1b of the diaper 1 and are located in the longitudinal direction of the diaper 1 more than the waist ends 1a, 1b. It is located in the direction. Further, the two core wrap sheets 6 wrapping the absorbent core 5 extend outward in the longitudinal direction from the longitudinal ends 5a, 5b of the absorbent core 5, and in the back side A, The extending portion reaches the waist end portion 1a of the back side portion A, whereby the core wrap sheet single arrangement region 20 having substantially the same width as the absorbent body 4 is formed in the central portion in the width direction of the waist portion D in the back side portion A. Is formed. On the other hand, in the abdominal side B, the extended portion of the core wrap sheet 6 does not reach the waist end 1b of the abdominal side B, and is adjacent to the front end in the extending direction of the extended portion. The absorber material non-arrangement region 30 exists. The length W4 of the absorbent material non-arrangement region 30 in the longitudinal direction of the diaper is preferably 5 to 50 mm, more preferably 10 to 30 mm. Moreover, the core wrap sheet single arrangement | positioning area | region 20 of the width substantially the same as the absorber 4 exists in the width direction center part of the ventral | abdominal side B adjacent to the absorber material non-arrangement area | region 30, The arrangement | positioning area | region 20 extends over the full length between the absorber material non-arrangement area | region 30 and the waist edge part 1b of the ventral | abdominal side part B. FIG.

  That is, in the present embodiment, the core wrap in which the absorbent core 5 is not disposed and the core wrap sheet 6 is disposed in the center portion in the width direction of the waist portion D in the back side portion A and the ventral side portion B. The sheet | seat independent arrangement | positioning area | region 20 is formed, and the core wrap sheet | seat 6 in this area | region 20 of the back side part A is continuous with the absorber 4, and is integrated. On the other hand, the core wrap sheet 6 in the region 20 on the ventral side B is not separated from the absorbent body 4 because the absorbent material non-arranged region 30 is interposed between the core wrap sheet 6 and the absorbent body 4. It is a separate and continuous body. In addition, the waist part D is the longitudinal direction of the diaper 1 from the waist end part (longitudinal direction edge part) 1a, 1b of the diaper 1 in the back side part A and the stomach side part B, respectively. It is a region having a length of about 5% of the entire length.

  And in this embodiment, the sheet | seat (surface sheet 2 in this embodiment) which coat | covers the skin contact surface side of the absorber 4 in the absorber material non-arrangement area | region 30, and the non-skin contact of this absorber 4 A sheet covering the contact surface side (back sheet 3 in the present embodiment) extends, and in the region 30, the sheets are bonded and bonded. Here, examples of the bonding treatment include application of an adhesive; sealing treatment such as heat sealing and ultrasonic sealing. In this embodiment, application of an adhesive is employed as the joining process, and the top sheet 2 and the back sheet 3 are joined and integrated in the region 30 with an adhesive (not shown). Since the absorbent material non-arrangement region 30 having such a configuration exists in the ventral part B, urine leakage in the ventral part B, or the water-absorbing resin contained in the absorbent core 5 or the like can be prevented. Is effectively prevented from falling off from the longitudinal end portion 5b on the ventral side B side. The term “urine leakage” as used herein means that body fluid such as urine once absorbed by the absorbent body (absorbent core) oozes out from the end of the absorbent body due to body pressure when the diaper is worn.

  The core wrap sheet 6 that wraps at least the absorptive core 5 is used for the joining process (application of adhesive, etc.) between the sheets in the absorbent material non-arranged region 30 from the viewpoint of surely achieving the above-described effects. It is preferable to apply over the entire width.

Further, from the same viewpoint, it is preferable that the joining process is performed over the entire area to be processed. That is, for example, when an adhesive is used as a bonding process as in the present embodiment, the adhesive application pattern has an adhesive application part and a non-application part distributed in a part to be processed, such as a spiral pattern. Instead of such a coating pattern, so-called solid coating in which the adhesive is uniformly applied to the portion to be processed is preferable. The application amount of the adhesive is preferably 5 to 30 g / m ² , more preferably 10 to 20 g / m ² . As the adhesive, for example, a hot melt adhesive such as rubber or olefin hot melt can be used.

  In the present embodiment, the core wrap sheet 6 is directed outward in the width direction from both side edges 5c, 5c in the width direction of the absorbent core 5 when the absorbent core 5 is overlapped on the center portion in the width direction. The extending portion 65 extends over the entire length of the core wrap sheet 6 in the longitudinal direction of the diaper, and the extending portion 65 extends in the longitudinal direction of the diaper as shown in FIGS. It is folded back inward in the width direction over its entire length. The extending portion 65 is folded back to the skin contact surface side along a folding line L extending along the diaper longitudinal direction, and in the region where the absorbent core 5 exists (in the crotch portion C), as shown in FIG. The side edge part along the diaper longitudinal direction of the extended extension part 65 is located on the side edge part 5 c of the absorbent core 5. Thus, by extending the extending portion 65 of the core wrap sheet 6, components such as fibers and water-absorbing resin contained in the absorbent core 5 can be removed from both side edges 5 c in the width direction of the core 5. It is effectively prevented from falling off 5c. Further, the portions where the core wrap sheet 6 is folded (both sides along the longitudinal direction of the absorbent body 4) have a large number of overlapping core wrap sheets 6, and therefore other portions where the core wrap sheet 6 is not folded. The rigidity is higher than that of (the central portion in the width direction of the absorbent body 4), so that when the diaper 1 is worn, the portion where the core wrap sheet 6 is folded is in the longitudinal direction of the absorbent body 4. The core wrap sheet 6 is effectively prevented from being broken due to a twist or break when wearing a diaper.

  The folded-back portion 66 of the extension portion 65 and the folded-back facing portion 67 that faces the folded-back portion 66 across the folded-back line L may be joined by a joining process or may not be joined. For example, the folded portion 66 and the folded facing portion 67 of the core wrap sheet 6 in the core wrap sheet single arrangement region 20 (waist portion D) of each of the back side portion A and the ventral side portion B are joined by a joining process. May be. In the present embodiment, as shown in FIGS. 2 and 3, the folded portion 66 and the folded facing portion 67 are not joined. Examples of the bonding treatment include application of an adhesive such as hot melt; sealing treatment such as heat sealing and ultrasonic sealing.

  However, since the sheet is cured when the sheet is subjected to the bonding process, there is a possibility that the fit property and the feeling of wearing may be deteriorated depending on the position where the bonding process is performed. From such a viewpoint, it is desirable that the extending portion 65 of the core wrap sheet 6 in the crotch portion C is not subjected to a joining process for joining the extending portion 65 to other portions. That is, it is desirable that the folded portion 66 of the extending portion 65 in the crotch portion C and the folded-back facing portion 67 that faces the folded portion 66 with the fold line L interposed therebetween are not joined by the joining process. In addition to the crotch portion C, it is more desirable not to apply the joining process to the extending portion 65 of the core wrap sheet 6 not only in the waist portion D but also in the back side portion A and the abdominal side portion B.

  If the formation material of each part in the diaper 1 is demonstrated, as the surface sheet 2 and the back surface sheet 3, various things conventionally used in the said technical field can be used. As the surface sheet 2, various liquid-permeable sheet materials such as a nonwoven fabric and an apertured film can be used. As the back sheet 3, a resin film having no moisture permeability, a resin film having fine holes and moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, a laminate of these with other sheets, or the like can be used. . Further, as the absorbent core 5 constituting the absorbent body 4, those used as the absorbent body in the technical field can be used without particular limitation, for example, a fiber assembly made of hydrophilic fibers such as wood pulp, A fiber assembly in which a particulate water-absorbing resin is held can be used.

Moreover, as the core wrap sheet | seat 6, liquid permeable sheets, such as paper, a nonwoven fabric, and an apertured film, can be used, for example. Among these, particularly, paper has a relatively high rigidity, so that it can be effectively prevented from being turned up by combining with the above-described technology for preventing turning up of the waist according to the present invention. The basis weight of the core wrap sheets 6, it is desirable not to inhibit the liquid permeability such as urine, while maintaining the rigidity, is preferably 5 to 30 g / m ^2, more preferably 10 to 20 g / m ² .

  Next, the manufacturing method of the absorbent article of this invention is demonstrated with reference to drawings, taking the manufacturing method of the disposable diaper 1 mentioned above as an example. In the description of the manufacturing method of the present invention, which will be described later, the same components as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted. The description of the embodiment described above is appropriately applied to components that are not particularly described.

  FIG. 4 is a perspective view schematically showing a manufacturing process of the diaper of the present embodiment, and FIG. 5 is a plan view showing a cutting position when cutting a diaper continuous body. The diaper manufacturing method of this embodiment is a so-called longitudinal flow type disposable diaper manufacturing method as shown in FIGS. 4 and 5, and a continuum forming step for obtaining a continuous body in which a plurality of diapers are continuous in the longitudinal direction. And a cutting step of cutting the continuous body into individual diapers.

  In the continuous body forming step, as shown in FIG. 4, the belt-like topsheet 82 that forms the topsheet 2 is fed in a predetermined direction, and the strip-like backsheet 83 that forms the backsheet 3 is It is configured to include the absorbent core 5 wrapped in the core wrap sheet 6 at the joining portion while feeding the top sheet original fabric 82 so as to overlap the surface sheet original fabric 82 and the back sheet original fabric 83. A plurality of absorbers 4 are sent at fixed feed intervals. When an elastic member such as a waist elastic member or a leg elastic member is disposed on the diaper 1, the elastic member can be sent between the two sheet raw fabrics 82 and 83 when the absorbent body 4 is fed.

  As shown in FIG. 5, the core wrap sheet 6 sent between the two raw sheets 82 and 83 has a longitudinal length L <b> 2 that is equal to or less than the overall length L <b> 1 in the longitudinal direction of the diaper, and one longitudinal end of the absorbent core 5. It has the extension part 6A extended toward the longitudinal direction outward from the part 5a. In this embodiment, L1 and L2 are substantially equal. Moreover, the core wrap sheet | seat 6 is extended slightly toward the longitudinal direction outward also from the longitudinal direction other end part 5b of the absorptive core 5, and has the extension part 6B. The extension length of the extension portion 6A is longer than that of the extension portion 6B.

  In the continuous body forming step, each absorbent body 4 is arranged such that the extending portion 6A of the core wrap sheet 6 (the extending portion having a relatively long extending length) straddles the boundary line CL in the extending direction. The sheet is disposed between both sheets 82 and 83. The boundary line CL is a boundary line between two adjacent diapers in the continuum 100 and extends linearly in the width direction of the continuum 100. As described above, the length L2 in the longitudinal direction of the core wrap sheet 6 is equal to or shorter than the total length L1 in the longitudinal direction of each diaper. Thus, the extending portion 6A extends in the extending direction in the boundary line CL. If the absorbent body 4 is arranged so as to straddle the longitudinal direction end portion (extension portion 6B) on the opposite side of the extension portion 6A in the core wrap sheet 6 constituting the absorbent body 4 straddles the boundary line CL. Not arranged. Each absorber 4 is arranged at a predetermined interval in the running direction of the continuous body 100, and this interval corresponds to the length W4 of the absorber material non-arrangement region 30 in the diaper longitudinal direction.

  And the surface sheet original fabric 82 and the back surface sheet original fabric 83 are joined in the state which pinched | interposed the absorber 4, and the continuous body 100 in which the several diaper continued in the longitudinal direction is obtained. This joining is performed by various seals such as an adhesive or heat seal. By this joining, the sheet material 82 and the sheet material 83 in the absorber material non-arrangement region 30 of the continuous body 100 are joined.

  Subsequently, as shown in FIG. 4, the semi-elliptical portion 90 is cut out from the left and right side edges of the running continuum 100 to form leg portions (the outer shape of the crotch C), and Fastening tape 10 is attached to both left and right edges. At this time, a landing tape (not shown) may be attached on the outer surface of the original sheet 83. The attached fastening tape 10 is folded back to the continuous body 100 side (surface sheet original fabric 82 side).

  Subsequently, in the cutting process, the continuum 100 is cut at the boundary line CL and separated into individual diapers. At this time, the extending part 6A of the core wrap sheet 6 straddling the boundary line CL is separated into two, one of which remains in the waist part D in the back side part A of the separated one diaper. The wrap sheet single arrangement | positioning area | region 20 is formed, and the other remains in the waist part D in the ventral | abdominal side part B of the other separated diaper, and the core wrap sheet single arrangement | positioning area | region 20 is formed. Thus, the diaper 1 having the configuration shown in FIG. 1 is obtained.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the said embodiment, although the absorber material non-arrangement area | region 30 existed in the ventral part B, as shown in FIG. 6, the absorber material non-arrangement area | region 30 exists in the back side part A. As shown in FIG. May be. Moreover, in the said embodiment, although the extension part 65 of the core wrap sheet | seat 6 was return | folded by the skin contact surface side, you may be return | folded by the non-skin contact surface side.

  Moreover, in the said embodiment, although the absorptive core was wrapped with two core wrap sheets, you may wrap an absorptive core with one core wrap sheet. For example, as the core wrap sheet, one liquid-permeable sheet having a width of 2 to 3 times the width of the absorbent core is used, and the absorbent core is placed at the center in the width direction of the sheet. The sheet may be wrapped around both sides of the sheet in the width direction on the upper surface side of the absorbent core, and the edges on both sides of the sheet in the width direction may be joined to form a tubular shape.

  Moreover, the diaper 1 of the said embodiment may be provided with the solid gathers which can stand above the skin contact surface (surface sheet 2) on both the left and right sides in the longitudinal direction, and both side edges of the crotch C The leg gathers may be formed by arranging the elastic members in a stretched state. Moreover, in the said embodiment, although the expansion-contraction member (what is called a waist elastic member) which can be expanded-contracted in the width direction of the diaper 1 was not distribute | arranged to the waist part D of the back side part A and the abdominal side part B, back side part The waist elastic member may be arranged on the waist portion D of A and / or the ventral side B.

  For example, in the above-described embodiment, a so-called unfolded disposable diaper is given as one application example of the absorbent article of the present invention. It can also be applied to napkins for use, panty liners (orimono sheets), and the like.

FIG. 1 is a skin contact surface side (surface sheet side) schematically showing a state in which an unfolded disposable diaper, which is an embodiment of the absorbent article of the present invention, is expanded in a flat shape by stretching elastic members of each part. ). FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3 is a longitudinal sectional view schematically showing a section taken along line II-II in FIG. FIG. 4 is a perspective view schematically showing a manufacturing process of the diaper shown in FIG. FIG. 5 is a plan view showing a cutting position when cutting a diaper continuous body. FIG. 6 is a view corresponding to FIG. 1 (a plan view on the skin contact surface side) of another embodiment of the absorbent article of the present invention.

Explanation of symbols

1 disposable diaper (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent core 6 Core wrap sheet 6A, 6B Extension part 10 of core wrap sheet Three-dimensional gather 20 Core wrap sheet single arrangement area 30 Absorber material non-arrangement area 65 Extension of core wrap sheet Protruding part 66 Extension part folding part 67 Folding facing part 82 Top sheet original fabric 83 Back sheet original fabric 100 Continuum A Back side part B Abdomen side part C Crotch part D Waist part L Extension part (core wrap sheet) Folding line CL boundary line (cut line)

Claims (3)

Equipped with a surface sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorbent body interposed between both sheets, and is substantially vertically long with the ventral, crotch, and dorsal sides elongated An absorbent article having a liquid-retaining absorbent core and a core wrap sheet that wraps the absorbent core,
There is an absorbent material non-arrangement region in which the absorbent core and the core wrap sheet are not arranged over the entire length in the width direction of the absorbent article on the ventral side or the back side,
There is a core wrap sheet single region where the absorbent core is not disposed and the core wrap sheet is disposed outside the absorbent material in the longitudinal direction of the absorbent article. , The absorbent is present in the longitudinal direction of the absorbent article,
In the absorber material non-arrangement region, a sheet covering the skin contact surface side of the absorber and a sheet covering the non-skin contact surface side of the absorber extend, and the absorption An absorbent article in which the two sheets are joined and joined in the body material non-arranged region.   The absorbent article according to claim 1, wherein the joining treatment is performed over the entire width of the core wrap sheet that wraps the absorbent core. It is a manufacturing method of the absorptive article according to claim 1,
The belt-like topsheet forming the topsheet is fed in a predetermined direction, and the strip-like backsheet forming the backsheet is fed so as to overlap the topsheet, the topsheet and the backside A plurality of absorbent bodies configured to include an absorbent core wrapped with a core wrap sheet are fed to a joining portion of the sheet original fabric at a certain feeding interval, and the surface sheet original fabric and the back surface are joined. A continuous body forming step of joining a sheet raw fabric with the absorbent body interposed therebetween, and obtaining a continuous body in which a plurality of absorbent articles are continuous in the longitudinal direction;
Cutting the continuous body at a boundary line between two adjacent absorbent articles extending in the width direction of the continuous body,
The core wrap sheet has a longitudinal length that is equal to or less than a longitudinal length of the absorbent article and has an extending portion that extends outward in the longitudinal direction from one longitudinal end of the absorbent core. And
In the continuum forming step, each absorber is disposed between the top sheet raw fabric and the back sheet original fabric so that the extending portion of the core wrap sheet straddles the boundary line in the extending direction. A method for manufacturing an absorbent article.

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