WO2019131057A1 - Manufacturing method of absorbent article, and manufacturing device of absorbent particle - Google Patents

Manufacturing method of absorbent article, and manufacturing device of absorbent particle Download PDF

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Publication number
WO2019131057A1
WO2019131057A1 PCT/JP2018/045073 JP2018045073W WO2019131057A1 WO 2019131057 A1 WO2019131057 A1 WO 2019131057A1 JP 2018045073 W JP2018045073 W JP 2018045073W WO 2019131057 A1 WO2019131057 A1 WO 2019131057A1
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WIPO (PCT)
Prior art keywords
sheet
stretchable sheet
bonding
manufacturing
area
Prior art date
Application number
PCT/JP2018/045073
Other languages
French (fr)
Japanese (ja)
Inventor
秀晃 槇
井上　拓也
哲郎 大窪
紀子 清水
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to CN201880084014.2A priority Critical patent/CN111526844B/en
Priority to RU2020121410A priority patent/RU2774532C2/en
Publication of WO2019131057A1 publication Critical patent/WO2019131057A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers

Definitions

  • the present invention relates to a method of manufacturing an absorbent article, and an apparatus for manufacturing an absorbent article.
  • Disposable diapers are known as absorbent articles.
  • the absorbent main body is cross-linked between the front and back body exterior bodies, the widthwise side edges of the front and back body exterior bodies are joined to each other, and the waist opening is formed.
  • the disclosed disposable diaper is disclosed.
  • an elastic material around the waist is fixed in an extended state between the inner sheet and the outer sheet (non-stretchable sheet).
  • a planar stretchable sheet for example, a stretchable nonwoven fabric or the like
  • a stretchable sheet it is possible to bring the front exterior body and the back exterior body (a waist portion) into close contact with the body of the wearer. Therefore, the trace of the stretchable material can be hardly left on the skin of the wearer.
  • the present invention has been made in view of the above-described conventional problems, and its object is to provide an absorbent article in which curling of the end portion of the elastic sheet on the waist portion side is suppressed.
  • the stretching force is increased by the amount of the folded back elastic sheet, so the stretching force on the waist area The force is greater than the designed force, making it difficult to widen the waistline opening when worn.
  • the main invention for achieving the above object is a method of manufacturing an absorbent article having an absorbent main body and a first waist part, wherein the non-stretchable sheet constituting the first waist part is conveyed in the conveyance direction Forming an adhesive area by providing an adhesive in a predetermined area of the non-stretchable sheet being conveyed, forming an adhesive area in an adhesive area forming process, and the elastic sheet in a state of being stretched in the conveying direction An elastic sheet bonding step of bonding to the non-stretchable sheet via the bonding region, and in the elastic sheet bonding step, one of the bonding regions in a cross direction intersecting the transport direction in the elastic sheet bonding step
  • the stretchable sheet is joined such that a side end is located on the one side of the stretchable sheet on the one side.
  • the manufacturing method of the absorbent article which suppressed turning-off of the edge part by the side of the waist part opening part of the elastic sheet provided in the waist part can be provided.
  • FIG. 7 is a flow diagram showing a part of the manufacturing process of the ventral torso part 20. It is the schematic which showed the conveyance line of the belly-side waist part 20, and is a figure explaining the processing content implemented in each process shown by FIG.
  • FIG. 6 is a view showing the AA cross section of FIG. 5 and is a schematic cross sectional view showing a state in which the first bonding region 41 is formed on the armored continuous sheet 25s.
  • FIG. 6 is a view showing a cross section taken along the line B-B in FIG.
  • FIG. 5 is a schematic cross-sectional view showing a state in which the stretchable sheet 24 is joined to the armored continuous sheet 25s via the first bonding region 41.
  • FIG. 6 is a view showing a cross section taken along line CC of FIG. 5 and is a schematic cross-sectional view showing a state in which a second bonding area 43 is formed in the stretchable sheet 24.
  • FIG. 6 is a view showing the DD cross section of FIG. 5 and is a schematic cross section showing a state in which the stretchable sheet 24 is covered by the outer layer sheet 22. It is a schematic sectional drawing represented about the modification of a cover process.
  • a method of manufacturing an absorbent article having an absorbent main body and a first waist part comprising: conveying the non-stretchable sheet constituting the first waist part in the conveyance direction; A bonding area forming step of providing an adhesive in a predetermined area of the non-stretchable sheet to form a bonding area, and the non-stretching property of the stretchable sheet in a state of being stretched in the transport direction via the bonding area.
  • An elastic sheet bonding step of bonding to a sheet wherein in the elastic sheet bonding step, one end of the bonding area in the crossing direction intersecting the transport direction is the length of the elastic sheet.
  • the entire area in the crossing direction of the adhesion area is covered by the predetermined sheet member, and the adhesive is not exposed to the outside, so the skin of the wearer and the like It is suppressed that an adhesive adheres to these members.
  • the predetermined sheet member is at the predetermined position on the one side with respect to the one end of the stretchable sheet in the cross direction, on the other side in the cross direction. It is desirable that the non-stretchable sheet be folded back.
  • the adhesive forming the adhesive region is moved to one side in the cross direction from the predetermined position by folding the non-stretchable sheet at the predetermined position. Is limited. That is, when the diaper is formed into a pants-like shape, the adhesive is suppressed from protruding from the upper end of the ventral-side waist portion. This makes the wearer less likely to feel discomfort.
  • the adhesive is applied to a predetermined area of the surface of the elastic sheet opposite to the surface adhered by the adhesive area. Forming a second bonding area, forming a second bonding area, and bonding the non-stretchable sheet folded back to the elastic sheet via the second bonding area. desirable.
  • an average basis weight of a portion where the adhesive is provided in the second adhesive region is a portion where the adhesive is provided in the adhesive region. It is desirable that it is larger than the average basis weight of
  • the bonding strength between the non-stretchable sheet and the stretchable sheet is locally increased by increasing the basis weight of the adhesive provided in the second bonding area. Even in the case of the influence of an external force such as a frictional force, it is easy to suppress the peeling of the non-stretchable sheet.
  • the end on the one side of the second bonding area is the other side of the end on the one side of the stretchable sheet in the cross direction. desirable.
  • the second adhesion area overlaps the adhesion area by preventing the second adhesion area from protruding to one side of the one end of the stretchable sheet. Being formed is suppressed. Therefore, the adhesive is excessive, and it is possible to suppress the exudation from the ventral waist portion and the curing of the non-woven fabric.
  • the other end of the non-stretchable sheet folded back in the cross direction is the other side of the other end of the second bonding area. Is desirable.
  • the second adhesive region is covered by the non-stretchable sheet, and it is possible to suppress the adhesive from protruding from the other end of the non-stretchable sheet. Further, since the adhesive is not attached to the other end of the non-stretchable sheet, the area in the vicinity of the end becomes so-called dry edge and can be kept flexible. Therefore, the touch at the time of diaper wearing becomes favorable.
  • the other end of the elastic sheet is closer to the other side than the other end of the adhesion region in the cross direction.
  • the stretchable sheets are joined in such a way that
  • the end of the stretchable sheet on the other side in the cross direction by arranging the stretchable sheet so that the adhesion region does not protrude from the other end of the stretchable sheet In the part area, adhesion of the adhesive to the body of the wearer can be suppressed.
  • the other end of the elastic sheet is closer to the one side than the other end of the bonding area in the cross direction.
  • the stretchable sheets are joined in such a way that
  • the other side end of the stretchable sheet is less likely to be curled, and therefore, the contraction force in the region is suppressed to be larger than the design value.
  • the manufacturing apparatus which manufactures an absorptive article which has an absorptive main part and the 1st waist part, and which conveys a non-stretchable sheet which constitutes the 1st waist part in a conveyance direction, and conveyance
  • An adhesive area forming portion for forming an adhesive area by providing an adhesive in a predetermined area of the non-elastic sheet, and an elastic sheet in a state of being stretched in the transport direction via the adhesive area
  • the stretchable sheet bonding portion has a stretchable sheet bonding portion to be bonded to the non-stretchable sheet, and in the stretchable sheet bonding portion, one end of the bonding area in the cross direction crossing the conveyance direction is the stretchable
  • the stretchable sheet is joined so as to be positioned on the one side of the one side of the elastic sheet, the manufacturing apparatus of the absorbent article is clarified.
  • the stretchable sheet is joined to the end on one side in the cross direction, curling of the stretchable sheet occurs in the end area on the one side
  • the suppressed absorbent article can be manufactured.
  • the waistline opening of the absorbent article can be easily spread, and excessive tightening of the waistline of the wearer can be prevented.
  • the absorbent article according to the present invention is not limited to disposable diapers for infants, and can be used as disposable diapers for adults, menstrual shorts, and the like.
  • FIG. 1 is a perspective view of a disposable diaper 1 (hereinafter, "diaper").
  • FIG. 2 is a plan view of the diaper 1 in the unfolded and stretched state.
  • FIG. 3 is a cross-sectional view taken along line II of FIG.
  • the diaper 1 has the up-down direction and the left-right direction in the pants-type state as shown in FIG. 1, and the waist opening BH and the pair of leg openings LH are formed.
  • the waist opening BH side is the upper side
  • the crotch side is the lower side.
  • the direction in which the materials constituting the diaper 1 are stacked is referred to as the thickness direction
  • the side in contact with the wearer in the thickness direction is referred to as the skin side, and the side not in contact with the wearer. It is called the non-skin side.
  • the diaper 1 has the absorptive main body 10, the ventral waistline part 20, and the back waistline part 30 which are three members of rectangular shape planar view.
  • the ventral waistline 20 (first waistline) is applied to the belly side of the wearer, and the back waistline 30 (second waistline) is applied to the back side of the wearer.
  • the ventral-side waist portion 20 and the back-side waist portion 30 are arranged such that their longitudinal direction is along the left-right direction of the diaper 1.
  • the end of the absorbent main body 10 on one side in the longitudinal direction is disposed at the center of the ventral-side waist portion 20 in the left-right direction, and the length of the absorbent main body 10 is at the center of the back-side waist portion 30 in the left-right direction.
  • the other end of the direction is disposed.
  • the absorbent main body 10 is folded in half at the approximate center of the longitudinal direction so that the longitudinal direction of the absorbent main body 10 follows the vertical direction of the diaper 1.
  • Both ends of the ventral waist portion 20 and both ends of the back waist portion 30 are joined by thermal welding, ultrasonic welding or the like to form a pair of joint regions 2 as shown in FIG. It becomes diaper 1 of a pants type state.
  • the absorbent main body 10 is disposed on the non-skin side of the absorbent body 11, the liquid-permeable top sheet 12 disposed on the skin side of the absorbent body 11, and the absorbent body 11. It has the liquid-impermeable back sheet 13 and the outer layer sheet 14 disposed on the non-skin side of the back sheet 13.
  • Absorbent body 11 has absorptive core 11A which absorbs and holds waste fluid, such as urine, and liquid permeable core wrap sheet 11B which covers absorptive core 11A.
  • the absorbent core 11A include those in which a liquid absorbent fiber such as pulp containing a high absorbent polymer (SAP) is molded into a predetermined shape.
  • the leg elastic member 15 is provided in the both sides of the absorptive main body 10 in the left-right direction, and the diaper 1 fits around a leg of a wearer.
  • the leg elastic members 15 are fixed in a stretched state in the longitudinal direction of the absorbent main body 10, for example, between the outer layer sheet 14 which is folded back inward in the left-right direction to form two layers.
  • a thread-like elastic member or a stretchable sheet can be exemplified.
  • the ventral-side waist portion 20 and the back-side waist portion 30 are, as shown in FIG. 3, respectively, inner layer sheets 21 and 31, outer layer sheets 22 and 32 laminated on the inner layer sheets 21 and 31, and a plurality of filamentous elastic members 23 and 33.
  • the outer layer sheets 22 and 32 are arranged on the non-skin side of the inner layer sheets 21 and 31.
  • the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 are disposed on the non-skin side of the absorbent main body 10.
  • the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 alone are non-stretchable sheets that do not substantially have stretchability in the left-right direction of the diaper 1.
  • SMS non-woven fabric spun-bond / melt-blown / spun-bond non-woven fabric
  • spun-bond non-woven fabric spun-bond non-woven fabric
  • air-through non-woven fabric plastic sheet, apertured plastic sheet, and laminate sheets thereof as inner layer sheets 21 and 31 and outer layer sheets 22 and 32 Can.
  • the plurality of thread-like elastic members 23 and 33 are arranged in the vertical direction between the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32, and fixed in an extended state in the horizontal direction. Therefore, the ventral waist part 20 and the back waist part 30 expand and contract in the left-right direction, and fit around the wearer's waist.
  • thread-like elastic members 23, 33 thread-like elastic members such as rubber and spandex can be exemplified.
  • the thread-like elastic member 33 is disposed from the upper end to the lower end.
  • the thread-like elastic member 23 is not disposed at the upper end portion of the ventral-side waist portion 20, and instead, the stretchable sheet 24 which is expanded and contracted in the left-right direction is disposed.
  • the lower end portion of the stretchable sheet 24 and the thread-like elastic member 23 are disposed to overlap in the vertical direction, but may not be disposed.
  • the stretchable sheet 24 without disposing the thread-like elastic member 23 at the upper end of the ventral waist portion 20 in this manner, the upper end portion of the ventral waist portion 20 is in close contact with the wearer by the surface. Therefore, local tightening can be suppressed, and traces of the expansion and contraction member can be made difficult to remain. In particular, since the abdomen of an infant is popping out, it is preferable to suppress the tightening of the ventral torso part 20.
  • the stretchability of the upper end of the waist portion 20, 30 greatly influences the ease of opening the waist opening BH when the diaper 1 is worn.
  • the stretchable sheet 24 has a property of being easily stretched from the natural state and difficult to shrink from the stretched state. Therefore, by arranging the stretchable sheet 24 at the upper end of the ventral waist portion 20, the waist opening BH can be easily spread when the diaper 1 is worn, and after the waist portions 20 and 30 are fitted to the wearer. It can prevent the tightening of the abdomen.
  • the stretchable sheet 24 may be, for example, various types such as spunbonded non-woven fabric, air-through non-woven fabric, needle punched non-woven fabric, etc. composed of elastic fibers having a mass of 10 to 40 g / m 2 , more preferably 15 to 30 g / m 2.
  • a stretchable non-woven fabric produced by a known method can be used.
  • the elastic fiber is made of a thermoplastic elastomer, rubber or the like as a raw material, and particularly when a thermoplastic elastomer is used as a raw material, melt spinning using an extruder is possible like an ordinary thermoplastic resin. Also, the fibers thus obtained are easily heat-sealed and are suitable as stretchable non-woven fibers.
  • thermoplastic elastomer examples include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, and polyurethane-based elastomers. These can be used singly or in combination of two or more.
  • the stretchable sheet may be any sheet that exhibits elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretching ratio in the left-right direction of the stretchable sheet 24 is preferably about 1.2 to 3.0.
  • the diaper 1 is configured by the ventral waist portion 20 and the back waist portion 30, and the absorbent main body 10 disposed so as to be bridged therebetween.
  • the diaper 1 is subjected to various treatments such as bonding treatment and cutting treatment while the sheet members and the like serving as the raw materials of the respective portions (10, 20, 30) are conveyed along the conveying direction.
  • the manufacturing process of the diapar 1 the method to manufacture the belly side waistline part 20 which the bending of the elastic sheet 24 does not produce easily is demonstrated.
  • FIG. 4 is a flowchart showing a part of the manufacturing process of the ventral torso part 20.
  • FIG. 5 is a schematic view showing a transport line (transport section) of the ventral-side waist section 20, and is a view for explaining the processing content carried out in each step shown in FIG.
  • a side view schematically showing each process of the transport line and a plan view showing a state of the belly-side waist portion 20 (the armored continuous sheet 25 s) in each process are drawn.
  • each step of S101 to S104 is performed.
  • the “base sheet” of the belly-side waist portion 20 refers to a plurality of the outer layer sheet 22 and the inner layer sheet 21 stacked in the thickness direction with the thread-like elastic member 23 sandwiched therebetween in the lateral direction in FIG. It is a continuous exterior continuous sheet 25s.
  • the manufacturing method of the sheet member having the same structure as that of the external covering continuous sheet 25s is known, and thus the description thereof is omitted here.
  • the direction in which the exterior continuous sheet 25s is conveyed along the left-right direction in FIG. 2 is referred to as a conveyance direction
  • the direction intersecting the conveyance direction is referred to as a cross direction
  • the exterior continuous sheet 25s continuous in the conveyance direction is a product by being cut along a cross direction (direction corresponding to the longitudinal direction or the vertical direction in FIG. 2) in any process of the diaper 1 manufacturing process.
  • a ventral waistline 20 (diaper 1) of the unit is formed.
  • an adhesion region 41 is formed by providing an adhesive such as a hot melt adhesive on a predetermined area of a base sheet (outer continuous sheet 25s) conveyed from the upstream side to the downstream side in the conveyance direction by the conveyance section.
  • An adhesion area formation process is performed (S101).
  • adhesion field 41 is also called “the 1st adhesion field 41.”
  • the process of forming the 1st adhesion field 41 is also called “the 1st adhesion field formation process (S101)."
  • FIG. 6 is a view showing the AA cross section of FIG. 5 and is a schematic cross-sectional view showing a state in which the first bonding region 41 is formed on the surface of the exterior continuous sheet 25s.
  • the first bonding area 41 is a substantially rectangular area formed along the transport direction (left-right direction). An adhesive is applied to the rectangular area of the continuous covering sheet 25s being conveyed, with an approximately even basis weight, from an adhesion area forming part provided above the conveying part.
  • the first bonding area 41 has a predetermined width in the cross direction as shown in FIG. 6, and the end of one side in the cross direction (corresponding to the upper side in the vertical direction in FIG.
  • region 41 is formed so that the edge 21a of the one side of the cross direction of the inner-layer sheet 21 is straddled in a cross direction among the exterior
  • a stretchable sheet bonding step is performed in which the stretchable sheet 24 in a state of being stretched in the transport direction is bonded to the outer covering continuous sheet 25s via the first bonding region 41 (S102).
  • the stretchable sheet bonding step is carried out by the stretchable sheet bonding portion, and the spun bond non-woven fabric or the like described above is conveyed in a state of being stretched in the transport direction while performing appropriate stretching processing such as gear stretching. Join and join.
  • the stretchable sheet 24 is joined to the armored continuous sheet 25s by arranging the elastic sheet 24 so as to overlap with the area where the first bonding area 41 is formed on the armored continuous sheet 25s.
  • FIG. 7 is a view showing the B-B cross section of FIG. 5 and is a schematic cross-sectional view showing a state in which the stretchable sheet 24 is joined to the outer covering continuous sheet 25s via the first bonding area 41.
  • the elastic sheet bonding step the elastic sheet 24 is positioned such that the end 41 a of the first bonding area 41 is located on one side of the end 24 a of the elastic sheet 24 in the cross direction. It is joined. Therefore, in the process of S102, the first adhesion region 41 is in a state of protruding outside (one side) than the end 24a of the stretchable sheet 24 on one side in the cross direction. Thereby, the end 24a of the stretchable sheet 24 is firmly joined to the exterior continuous sheet 25s.
  • the stretchable sheet 24 is positioned such that the end 24a on one side of the stretchable sheet 24 is positioned on one side of the end 41a on one side of the first bonding region 41 in the cross direction. It is a schematic sectional drawing represented about the case where it joins.
  • a portion (including the end 24 a) of the stretchable sheet 24 that protrudes to one side of the first bonding area 41 is not joined to the exterior continuous sheet 25 s. That is, in the stretchable sheet 24, there are a portion where the rigidity is high by being joined with the exterior continuous sheet 25s, and a portion where the rigidity is not joined with the exterior continuous sheet 25s.
  • a folded-back portion 241 is formed by folding back (twisting) a portion of the stretchable sheet 24 which protrudes in the cross direction from the first bonding region 41 to the other side.
  • the stretchable sheet 24 since the stretchable sheet 24 is laminated in the thickness direction, the stretching force in the transport direction is increased, and the tightening around the waist of the wearer is locally tight when the diaper 1 is worn. Or it may be difficult to widen the opening BH.
  • the stretchable sheet 24 is joined to the exterior continuous sheet 25s at the end 24a on one side in the cross direction, curling may occur at one end on the one side in the cross direction. Be suppressed.
  • the contraction force in the transport direction is suppressed to be greater than the designed force. . Therefore, the ease of opening the waistline opening BH when the diaper 1 is worn can be maintained, and excessive tightening of the waistline of the wearer can be prevented.
  • the stretchable sheet 24 is stretched so that the other end 24b of the stretchable sheet 24 is positioned on the other side of the other end 41b of the first bonding region 41 in the cross direction.
  • Sheet 24 is joined. That is, on the other side in the cross direction, the first bonding area 41 does not protrude from the end 24 b of the stretchable sheet 24.
  • the adhesive (the first adhesion area 41) protrudes from the area, the adhesive may adhere to the body of the wearer. Therefore, in the present embodiment, the adhesive is attached to the body of the wearer by arranging the stretchable sheet 24 so that the first bonding area 41 does not protrude from the end 24b of the stretchable sheet 24. It is suppressing.
  • the stretchable sheet 24 is bonded such that the other end 24b of the stretchable sheet 24 is positioned on one side of the other end 41b of the first bonding area 41 in the cross direction. It may be (not shown). In this case, on the other side in the cross direction, the first bonding area 41 protrudes from the end 24 b of the stretchable sheet 24. With such a configuration, the stretchability is the same as described in FIG. 8. Since the other side end of the sheet 24 is less likely to be turned, it is possible to suppress the contraction force in the area from becoming larger than the design value.
  • a portion of the first bonding area 41 that protrudes from the end 24 b of the stretchable sheet 24 is a different sheet member (for example, the cover sheet 26 or the folded outer layer sheet 22 in a cover process (S 104) and the like described later. ) Are joined. Therefore, the possibility that the adhesive constituting the first adhesive region 41 is exposed to the outside is low, and problems such as adhesion of the adhesive to the skin of the wearer are unlikely to occur.
  • FIG. 9 is a view showing the CC cross section of FIG. 5 and is a schematic cross section showing a state in which the second bonding area 43 is formed in the stretchable sheet 24. As shown in FIG.
  • the second adhesive area 43 is formed by providing an adhesive such as a hot melt adhesive on the surface of the stretchable sheet 24 opposite to the surface bonded by the first adhesive area 41. It is formed.
  • the second bonding area 43 is a substantially band-like (rectangular) area along the transport direction.
  • the second adhesive region 43 is formed by applying an adhesive in a spiral pattern or ⁇ pattern along the transport direction.
  • the second adhesion region 43 is formed by applying an adhesive to the stretchable sheet 24 (stretchable non-woven fabric)
  • the surface of the stretchable non-woven fabric has a rough and dense structure, so the range to which the adhesive is applied If the width of the stretchable nonwoven fabric is too large, the adhesive may exude on the opposite side of the stretchable nonwoven fabric. Therefore, by applying the adhesive in a spiral pattern or the like along the transport direction, the adhesive is provided only in a limited area in the stretchable nonwoven fabric.
  • one end 43a of the second bonding area 43 in the cross direction is closer to the other side in the cross direction than the one end 24a of the elastic sheet 24 in the cross direction.
  • a second bonding area 43 is formed to be positioned. That is, the adhesive is applied so as not to protrude outside the end 24 a on one side of the stretchable sheet 24.
  • the first bonding area 41 is formed to protrude outward beyond the end 24 a on one side of the stretchable sheet 24. Therefore, when the second bonding area 43 is further formed outside the one end 24 a of the stretchable sheet 24, the first bonding area 41 and the second bonding area 41 are formed in the area on one side in the cross direction than the end 24 a.
  • the adhesion area 43 is formed to overlap, and there is a possibility that the adhesive in this area is excessive. In this case, the adhesive exudes in the ventral waist part 20 and the non-woven fabric hardens to cause discomfort to the wearer. Therefore, in the present embodiment, the second adhesive region 43 is formed so as not to protrude outside the end 24 a of the stretchable sheet 24, thereby suppressing the bleeding of the adhesive and the like.
  • the basis weight of the adhesive in the portion to which the adhesive is applied in the second adhesive region 43 is higher than the basis weight of the adhesive in the portion to which the adhesive is applied in the first adhesive region 41.
  • the second bonding area 43 is formed to be large.
  • the portion of the second adhesive region 43 to which the adhesive is applied is the adhesive along the transport direction by a spiral pattern or the like in the region of the second adhesive region 43 represented by the hatched portion in FIG. Is the part that is actually applied.
  • the portion of the first bonding area 41 to which the adhesive is applied is the whole of the first bonding area 41 represented by the hatched portion in FIG.
  • the second bonding area 43 is formed to bond the sheet member (for example, the outer layer sheet 22) in the next step (S104).
  • seat member is a member arrange
  • FIG. Therefore, there is a possibility that bonding between the sheet member and the stretchable sheet 24 may be peeled off under the influence of an external force such as a frictional force generated between the wearer's skin and the like. Therefore, in the present embodiment, by increasing the basis weight of the adhesive provided in the second bonding area 43, the bonding strength is locally increased to make the sheet member difficult to peel off.
  • the adhesive is provided substantially uniformly over a wide area, the first adhesive area 41 can ensure the bonding strength of the entire first adhesive area 41 even if the basis weight is low.
  • a covering process is performed, in which a predetermined sheet member is joined via the first bonding area 41 and the second bonding area 43, and the stretchable sheet 24 is covered from the skin side in the thickness direction (S104).
  • the outer layer sheet 22 constituting the exterior continuous sheet 25s is used as the predetermined sheet member.
  • FIG. 10 is a view showing the DD cross section of FIG. 5 and is a schematic cross section showing a state in which the stretchable sheet 24 is covered by the outer layer sheet 22.
  • the outer layer sheet 22 (outer covering continuous sheet 25 s) protrudes to one side from the end 41 a on one side of the first bonding region 41 in the cross direction (the end 221 and Yes).
  • the end 221 of the outer layer sheet 22 that protrudes to one side in the cross direction is folded back to the other side in the cross direction at a predetermined position F1 in the cross direction, and the end 221 is folded back.
  • the stretchable sheet 24 is covered from the skin side (upper side in FIG. 10).
  • the predetermined position F1 is any position on one side of the end 24a of the stretchable sheet 24 in the cross direction, and in FIG. 10, the predetermined position F1 substantially corresponds to the one end 41a of the first bonding region 41. It shall be the same position.
  • the end 221 of the folded outer layer sheet 22 is joined to a portion of the first bonding area 41 that protrudes from one end 24 a of the stretchable sheet 24 in the cross direction to one side. That is, the outer layer sheets 22 are joined by a part of the first bonding area 41. As a result, the return end 221 is prevented from returning to the original state. Further, the entire area in the cross direction of the first bonding area 41 is covered by any sheet member (see FIG. 10), and the adhesive forming the first bonding area 41 is not exposed to the outside Therefore, adhesion of the adhesive to the skin of the wearer and other members (for example, the side waist portion 30 and the absorbent main body 10) is suppressed.
  • the predetermined position F1 is a position to be the upper end of the belly-side waist portion 20 (see FIG. 3).
  • the movement of the adhesive forming the first adhesive region 41 to one side in the cross direction from the predetermined position F1 is restricted. Ru. That is, when the diaper 1 is formed into a pants-like shape, the adhesive is prevented from protruding from the upper end of the belly-side waist portion 20. This makes the wearer less likely to feel discomfort.
  • the end 221 of the folded outer layer sheet 22 is bonded to the second bonding area 43.
  • the basis weight of the adhesive is high, and the bonding strength when bonding the end portion 221 can be increased. Therefore, the folded back end 221 is firmly fixed to the stretchable sheet 24 in a stacked state, and the folded back state of the end 221 is suppressed from being returned to the original state.
  • the end 221a of the folded back end 221 (that is, the free end side of the folded back end 221) is on the other side of the other end 43b of the second bonding region 43 in the cross direction. positioned. Therefore, the entire second bonding region 43 is covered by the end 221, and the adhesive is less likely to protrude from the end 221.
  • the adhesive since the adhesive is not attached to the end 221a, the area near the end 221a becomes a so-called dry edge and is kept flexible. Therefore, the touch when wearing the diaper 1 is good.
  • the process of joining the absorptive main body 10 After the process of S104, the process of joining the absorptive main body 10, the process of cutting the exterior continuous sheet 25s, etc. are implemented, and the diaper 1 is completed.
  • packing continuous sheets may be implemented between the process of S103, and the process of S104.
  • FIG. 11 is a schematic cross-sectional view showing a modification of S104.
  • the outer layer sheet 22 is not folded back, but instead a cover sheet 26, which is a non-stretchable sheet, is provided.
  • the cover sheet 26 the same member as the outer layer sheet 22 (for example, SMS non-woven fabric etc.) can be used.
  • the end 26 a on one side of the cover sheet 26 is located on one side of the end 41 a on one side of the first bonding area 41.
  • the other end 26 b of the cover sheet 26 is positioned on the other side of at least the other end 43 b of the second bonding area 43. Then, the cover sheet 26 is joined to a portion of the first bonding area 41 which protrudes from one end 24 a of the stretchable sheet 24 in the cross direction to one side and is joined to the second bonding area 43.
  • the adhesive since the adhesive is not exposed to the outside, the adhesive does not easily adhere to the wearer's skin or other members, and the step of bending the outer layer sheet 22 can be omitted. . Furthermore, since the size and arrangement of the cover sheet 26 can be freely changed, various diapers having different designs and sizes can be easily manufactured.
  • the present invention is not limited to disposing the stretchable sheet 24 at the upper end portion of the ventral-side waist portion 20.
  • the stretchable sheet 24 may be disposed at any position on the ventral side waist portion 20 in the vertical direction.
  • the back waistline portion 30 first waistline portion
  • the ventral waistline portion 20 second waistline portion
  • the belly side waistline portion Both 20 and the back waistline portion 30 may have the stretchable sheet 24.
  • the underpants-type absorbent article was demonstrated as what is called a three-piece type disposable diaper which has the belly side waist part 20, the back side waist part 30, and the absorptive main body 10. It is not limited.
  • the exterior sheet 14 may be a diaper (so-called two-piece type) integrated by connecting the ventral waistline portion 20 and the rear waistline portion 30.
  • 1 diaper (absorbent article), 2 bonding area 10 Absorbent body, 11 Absorbent body, 11A absorbent core, 11B core wrap sheet, 12 top sheets, 13 back sheets, 14 outer layer sheet, 15 elastic members around, 20 ventral waistline (first waistline), 21 inner layer sheet (non-stretchable sheet), 21a end (one side), 22 outer layer sheet (non-stretchable sheet), 221 end, 23 thread elastic members, 24 elastic sheet, 24a end (one side), 24b end (other side), 241 turn, 25s exterior continuous sheet, 26 cover sheet, 26a end (one side), 26b end (other side), 30 back waist (second waist), 31 inner layer sheet, 32 outer layer sheet, 33 thread-like elastic member, 41 bonding area (first bonding area), 41a end (one side), 41b end (other side), 43 second bonding area, 43a end (one side), 43b end (other side)

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Abstract

This manufacturing method of an absorbent article (1) having an absorbent body and a first waist part (20) involves: a conveyance step for conveying in a conveyance direction a non-elastic sheet (21, 22) configuring the first waist part (20); an adhesive region forming step for providing an adhesive in a prescribed region of the conveyed non-elastic sheet (21, 22) to form an adhesive region (41); and an elastic sheet bonding step for bonding the elastic sheet (24), while in a state stretched in the conveyance direction, to the non-elastic sheet (21, 22) with the adhesive region (41) interposed therebetween, wherein, in the elastic sheet bonding step, the elastic sheet (24) is bonded such that, in an intersecting direction that intersects the conveyance direction, the end (41a) on one side of the adhesive region (41) is positioned further to that side than the end (24a) on the same side of the elastic sheet (24).

Description

吸収性物品の製造方法、及び、吸収性物品の製造装置METHOD FOR MANUFACTURING ABSORBENT ARTICLE, AND APPARATUS FOR MANUFACTURING ABSORBENT ARTICLE
　本発明は、吸収性物品の製造方法、及び、吸収性物品の製造装置に関する。 The present invention relates to a method of manufacturing an absorbent article, and an apparatus for manufacturing an absorbent article.
　吸収性物品として、使い捨ておむつが知られている。特許文献１には、前身頃外装体と後身頃外装体の間に吸収性本体が架橋され、前身頃外装体と後身頃外装体の幅方向両側縁が互いに接合され、腰周り開口部が形成された使い捨ておむつが開示されている。前身頃外装体、及び、後身頃外装体では、腰周り伸縮材が、インナーシートとアウターシート（非伸縮性シート）の間に伸長状態で固定されている。 Disposable diapers are known as absorbent articles. In Patent Document 1, the absorbent main body is cross-linked between the front and back body exterior bodies, the widthwise side edges of the front and back body exterior bodies are joined to each other, and the waist opening is formed. The disclosed disposable diaper is disclosed. In the front body exterior body and the back body exterior body, an elastic material around the waist is fixed in an extended state between the inner sheet and the outer sheet (non-stretchable sheet).
特開２０１３－１３８７９５号JP, 2013-138795, A
　このような使い捨ておむつ（吸収性物品）において、腰回り伸縮材として、平面状の伸縮性シート（例えば伸縮不織布等）が用いられる場合がある。このような伸縮性シートを用いれば、前身頃外装体や後身頃外装体（胴回り部）を着用者の身体に面で密着させることができる。そのため、着用者の肌に伸縮材の跡を残り難くすることができる。 In such a disposable diaper (absorbent article), a planar stretchable sheet (for example, a stretchable nonwoven fabric or the like) may be used as a waist elastic material. If such a stretchable sheet is used, it is possible to bring the front exterior body and the back exterior body (a waist portion) into close contact with the body of the wearer. Therefore, the trace of the stretchable material can be hardly left on the skin of the wearer.
　本発明は、上記のような従来の問題に鑑みてなされたものであって、その目的は、胴回り部に設けられた伸縮性シートの胴回り開口部側の端部のめくれを抑えた吸収性物品の製造方法等を提供することにある。 The present invention has been made in view of the above-described conventional problems, and its object is to provide an absorbent article in which curling of the end portion of the elastic sheet on the waist portion side is suppressed. Providing a manufacturing method of
　しかしながら、このような吸収性物品の製造工程において、伸縮シートを伸長状態で固定した後、伸長状態が解除されると、該伸縮シートが収縮して端部における張力が下がることにより、伸縮シートの端部領域が捲れ上がってしまう場合がある。そして、伸縮シートが捲れ上がった領域では、該伸縮シートが厚さ方向に積層した状態となるため、局所的に伸縮力が強くなり、着用者の肌が強く締め付けられる等、着用者に不快感を生じさせるおそれがある。 However, in the manufacturing process of such an absorbent article, after the stretchable sheet is fixed in a stretched state, when the stretched state is released, the stretchable sheet shrinks and the tension at the end portion is reduced. The end area may get rolled up. Then, in the area where the stretchable sheet curls up, the stretchable sheet is laminated in the thickness direction, so the stretchability locally increases, and the wearer's skin is strongly tightened, etc., making the wearer uncomfortable. May cause
　また、胴回り開口部側（腰周り開口部側）の伸縮性シートの端部が捲れて折り返されてしまうと、折り返された伸縮性シートの分だけ伸縮力が増加することから、胴回りの伸縮力が設計した力よりも大きくなり、着用時に胴回り開口部を広げにくくなってしまう。 In addition, if the end of the elastic sheet on the waist opening side (the waist opening side) is folded back and folded, the stretching force is increased by the amount of the folded back elastic sheet, so the stretching force on the waist area The force is greater than the designed force, making it difficult to widen the waistline opening when worn.
　上記目的を達成するための主たる発明は、吸収性本体、及び、第１胴回り部を有する吸収性物品の製造方法であって、前記第１胴回り部を構成する非伸縮性シートを搬送方向に搬送する、搬送工程と、搬送されている前記非伸縮性シートの所定の領域に接着剤を設けて接着領域を形成する、接着領域形成工程と、前記搬送方向に伸長させた状態の伸縮性シートを、前記接着領域を介して前記非伸縮性シートに接合する、伸縮性シート接合工程と、を有し、前記伸縮性シート接合工程では、前記搬送方向と交差する交差方向において、前記接着領域の一方側の端が、前記伸縮性シートの前記一方側の端よりも前記一方側に位置するように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造方法である。
　本発明の他の特徴については、本明細書及び添付図面の記載により明らかにする。 The main invention for achieving the above object is a method of manufacturing an absorbent article having an absorbent main body and a first waist part, wherein the non-stretchable sheet constituting the first waist part is conveyed in the conveyance direction Forming an adhesive area by providing an adhesive in a predetermined area of the non-stretchable sheet being conveyed, forming an adhesive area in an adhesive area forming process, and the elastic sheet in a state of being stretched in the conveying direction An elastic sheet bonding step of bonding to the non-stretchable sheet via the bonding region, and in the elastic sheet bonding step, one of the bonding regions in a cross direction intersecting the transport direction in the elastic sheet bonding step In the method of manufacturing an absorbent article, the stretchable sheet is joined such that a side end is located on the one side of the stretchable sheet on the one side.
Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.
　本発明によれば、胴回り部に設けられた伸縮性シートの胴回り開口部側の端部のめくれを抑えた吸収性物品の製造方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the absorbent article which suppressed turning-off of the edge part by the side of the waist part opening part of the elastic sheet provided in the waist part can be provided.
使い捨ておむつ１（以下「おむつ」）の斜視図である。It is a perspective view of disposable diaper 1 (following "diaper"). 展開かつ伸長状態のおむつ１の平面図である。It is a top view of diaper 1 of a development and extension state. 図２のＩＩ線での断面図である。It is sectional drawing in the II line of FIG. 腹側胴回り部２０の製造工程の一部について示すフロー図である。FIG. 7 is a flow diagram showing a part of the manufacturing process of the ventral torso part 20. 腹側胴回り部２０の搬送ラインを示した概略図であり、図４で示される各工程において実施される処理内容を説明する図である。It is the schematic which showed the conveyance line of the belly-side waist part 20, and is a figure explaining the processing content implemented in each process shown by FIG. 図５のＡ－Ａ断面について表す図であり、外装連続シート２５ｓに第１接着領域４１が形成された状態を表す概略断面図である。FIG. 6 is a view showing the AA cross section of FIG. 5 and is a schematic cross sectional view showing a state in which the first bonding region 41 is formed on the armored continuous sheet 25s. 図５のＢ－Ｂ断面について表す図であり、第１接着領域４１を介して伸縮性シート２４が外装連続シート２５ｓに接合された状態を表す概略断面図である。FIG. 6 is a view showing a cross section taken along the line B-B in FIG. 5 and is a schematic cross-sectional view showing a state in which the stretchable sheet 24 is joined to the armored continuous sheet 25s via the first bonding region 41. 比較例として、交差方向において、第１接着領域４１の一方側の端４１ａが、伸縮性シート２４の一方側の端２４ａよりも他方側に位置するように、伸縮性シート２４が接合された場合について表す概略断面図である。As a comparative example, when the stretchable sheet 24 is joined such that the end 41a on one side of the first bonding region 41 is positioned on the other side of the end 24a on one side in the crosswise direction It is a schematic sectional view expressed about. 図５のＣ－Ｃ断面について表す図であり、伸縮性シート２４に第２接着領域４３が形成された状態を表す概略断面図である。FIG. 6 is a view showing a cross section taken along line CC of FIG. 5 and is a schematic cross-sectional view showing a state in which a second bonding area 43 is formed in the stretchable sheet 24. 図５のＤ－Ｄ断面について表す図であり、外層シート２２によって、伸縮性シート２４がカバーされた状態を表す概略断面図である。FIG. 6 is a view showing the DD cross section of FIG. 5 and is a schematic cross section showing a state in which the stretchable sheet 24 is covered by the outer layer sheet 22. カバー工程の変形例について表す概略断面図である。It is a schematic sectional drawing represented about the modification of a cover process.
　本明細書及び添付図面の記載により、少なくとも以下の事項が明らかとなる。
　吸収性本体、及び、第１胴回り部を有する吸収性物品の製造方法であって、前記第１胴回り部を構成する非伸縮性シートを搬送方向に搬送する、搬送工程と、搬送されている前記非伸縮性シートの所定の領域に接着剤を設けて接着領域を形成する、接着領域形成工程と、前記搬送方向に伸長させた状態の伸縮性シートを、前記接着領域を介して前記非伸縮性シートに接合する、伸縮性シート接合工程と、を有し、前記伸縮性シート接合工程では、前記搬送方向と交差する交差方向において、前記接着領域の一方側の端が、前記伸縮性シートの前記一方側の端よりも前記一方側に位置するように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造方法。 At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
A method of manufacturing an absorbent article having an absorbent main body and a first waist part, comprising: conveying the non-stretchable sheet constituting the first waist part in the conveyance direction; A bonding area forming step of providing an adhesive in a predetermined area of the non-stretchable sheet to form a bonding area, and the non-stretching property of the stretchable sheet in a state of being stretched in the transport direction via the bonding area. An elastic sheet bonding step of bonding to a sheet, wherein in the elastic sheet bonding step, one end of the bonding area in the crossing direction intersecting the transport direction is the length of the elastic sheet The method of manufacturing an absorbent article, wherein the stretchable sheet is joined so as to be positioned on the one side than the one side end.
　このような吸収性物品の製造方法によれば、伸縮性シートが、交差方向の一方側の端まで接合されているため、当該一方側の端部領域において伸縮性シートの捲れが発生することが抑制される。これにより、おむつの胴回り開口部が広げやすくなり、また、着用者の胴回り部に対する過度な締め付けを防止できる。 According to the manufacturing method of such an absorbent article, since the stretchable sheet is joined to the end on one side in the cross direction, curling of the stretchable sheet occurs in the end area on the one side Be suppressed. This facilitates the opening of the waistline of the diaper and also prevents excessive tightening of the waistline of the wearer.
　かかる吸収性物品の製造方法であって、前記伸縮性シート接合工程の後で、前記交差方向において、前記伸縮性シートの前記一方側の端よりも前記一方側にはみ出した接着領域に、所定のシート部材を接合する、ことが望ましい。 In the method of manufacturing such an absorbent article, after the elastic sheet bonding step, in the cross direction, a predetermined bonding area is projected to the one side beyond the one side end of the elastic sheet. It is desirable to join the sheet members.
　このような吸収性物品の製造方法によれば、接着領域の交差方向における全領域が、所定のシート部材によって覆われた状態となり、接着剤が外部に露出しなくなるため、着用者の肌や他の部材に接着剤が付着してしまうことが抑制される。 According to the manufacturing method of such an absorbent article, the entire area in the crossing direction of the adhesion area is covered by the predetermined sheet member, and the adhesive is not exposed to the outside, so the skin of the wearer and the like It is suppressed that an adhesive adheres to these members.
　かかる吸収性物品の製造方法であって、前記所定のシート部材は、前記交差方向において前記伸縮性シートの前記一方側の端よりも前記一方側の所定の位置で、前記交差方向の他方側に折り返された前記非伸縮性シートである、ことが望ましい。 In the manufacturing method of such an absorbent article, the predetermined sheet member is at the predetermined position on the one side with respect to the one end of the stretchable sheet in the cross direction, on the other side in the cross direction. It is desirable that the non-stretchable sheet be folded back.
　このような吸収性物品の製造方法によれば、所定位置にて非伸縮性シートを折り返していることにより接着領域を形成している接着剤が当該所定位置よりも交差方向の一方側に移動することが制限される。すなわち、おむつをパンツ型形状に形成した際に、腹側胴回り部の上端から接着剤がはみ出してしまうことが抑制される。これにより、着用者に不快感を与えにくくなる。 According to the manufacturing method of such an absorbent article, the adhesive forming the adhesive region is moved to one side in the cross direction from the predetermined position by folding the non-stretchable sheet at the predetermined position. Is limited. That is, when the diaper is formed into a pants-like shape, the adhesive is suppressed from protruding from the upper end of the ventral-side waist portion. This makes the wearer less likely to feel discomfort.
　かかる吸収性物品の製造方法であって、前記伸縮性シート接合工程の後で、前記伸縮性シートのうち、前記接着領域によって接着された面とは反対側の面の所定の領域に前記接着剤を設けて第２接着領域を形成する、第２接着領域形成工程を有し、折り返された前記非伸縮性シートを、前記第２接着領域を介して、前記伸縮性シートと接合する、ことが望ましい。 In the method of manufacturing such an absorbent article, after the elastic sheet bonding step, the adhesive is applied to a predetermined area of the surface of the elastic sheet opposite to the surface adhered by the adhesive area. Forming a second bonding area, forming a second bonding area, and bonding the non-stretchable sheet folded back to the elastic sheet via the second bonding area. desirable.
　このような吸収性物品の製造方法によれば、折り返された非伸縮性シートが伸縮性シートに積層された状態で第２接着領域によってしっかりと固定されるため、非伸縮性シートの折り返し状態が元に戻ってしまうことが抑制される。 According to the manufacturing method of such an absorbent article, since the folded non-stretchable sheet is firmly fixed by the second adhesive region in the state of being laminated to the stretchable sheet, the folded state of the non-stretchable sheet is Returning back is suppressed.
　かかる吸収性物品の製造方法であって、前記第２接着領域のうち、前記接着剤が設けられている部分の平均の坪量は、前記接着領域のうち、前記接着剤が設けられている部分の平均の坪量よりも大きい、ことが望ましい。 In the method of manufacturing such an absorbent article, an average basis weight of a portion where the adhesive is provided in the second adhesive region is a portion where the adhesive is provided in the adhesive region. It is desirable that it is larger than the average basis weight of
　このような吸収性物品の製造方法によれば、第２接着領域に設けられる接着剤の坪量を大きくすることで、非伸縮性シートと伸縮性シートとの接合強度が局所的に強くなり、摩擦力等の外力の影響を受けた場合であっても、非伸縮性シートが剥がれてしまうことを抑制しやすくなる。 According to the manufacturing method of such an absorbent article, the bonding strength between the non-stretchable sheet and the stretchable sheet is locally increased by increasing the basis weight of the adhesive provided in the second bonding area. Even in the case of the influence of an external force such as a frictional force, it is easy to suppress the peeling of the non-stretchable sheet.
　かかる吸収性物品の製造方法であって、前記交差方向において、前記第２接着領域の前記一方側の端は、前記伸縮性シートの前記一方側の端よりも、前記他方側である、ことが望ましい。 In the method of manufacturing such an absorbent article, the end on the one side of the second bonding area is the other side of the end on the one side of the stretchable sheet in the cross direction. desirable.
　このような吸収性物品の製造方法によれば、第２接着領域が伸縮性シートの一方側の端よりも一方側にはみ出さないようにすることで、第２接着領域と接着領域とが重複して形成されてしまうことが抑制される。したがって、接着剤が過多になり、腹側胴回り部から染み出したり、不織布を硬化させたりすることが抑制される。 According to the manufacturing method of such an absorbent article, the second adhesion area overlaps the adhesion area by preventing the second adhesion area from protruding to one side of the one end of the stretchable sheet. Being formed is suppressed. Therefore, the adhesive is excessive, and it is possible to suppress the exudation from the ventral waist portion and the curing of the non-woven fabric.
　かかる吸収性物品の製造方法であって、前記交差方向において、折り返された前記非伸縮性シートの前記他方側の端は、前記第２接着領域の前記他方側の端よりも前記他方側である、ことが望ましい。 In the method of manufacturing such an absorbent article, the other end of the non-stretchable sheet folded back in the cross direction is the other side of the other end of the second bonding area. Is desirable.
　このような吸収性物品の製造方法によれば、第２接着領域が非伸縮性シートによって覆われるようになり、該非伸縮性シートの他方側の端から接着剤がはみ出すことを抑制できる。また、非伸縮性シートの他方側の端部に接着剤が付着していないため、端部付近の領域が所謂ドライエッジとなって柔軟に保たれる。よって、おむつ着用時における肌触りが良好になる。 According to the manufacturing method of such an absorbent article, the second adhesive region is covered by the non-stretchable sheet, and it is possible to suppress the adhesive from protruding from the other end of the non-stretchable sheet. Further, since the adhesive is not attached to the other end of the non-stretchable sheet, the area in the vicinity of the end becomes so-called dry edge and can be kept flexible. Therefore, the touch at the time of diaper wearing becomes favorable.
　かかる吸収性物品の製造方法であって、前記伸縮性シート接合工程では、前記交差方向において、前記接着領域の他方側の端よりも、前記伸縮性シートの前記他方側の端が前記他方側になるように、前記伸縮性シートを接合する、ことが望ましい。 In the method of manufacturing an absorbent article, in the elastic sheet bonding step, the other end of the elastic sheet is closer to the other side than the other end of the adhesion region in the cross direction. Preferably, the stretchable sheets are joined in such a way that
　このような吸収性物品の製造方法によれば、接着領域が伸縮性シートの他方側の端からはみ出さないように、伸縮性シートを配置することによって、伸縮性シートの交差方向他方側の端部領域において、着用者の身体に接着剤が付着してしまうことを抑制することができる。 According to the manufacturing method of such an absorbent article, the end of the stretchable sheet on the other side in the cross direction by arranging the stretchable sheet so that the adhesion region does not protrude from the other end of the stretchable sheet In the part area, adhesion of the adhesive to the body of the wearer can be suppressed.
　かかる吸収性物品の製造方法であって、前記伸縮性シート接合工程では、前記交差方向において、前記接着領域の他方側の端よりも、前記伸縮性シートの前記他方側の端が前記一方側になるように、前記伸縮性シートを接合する、ことが望ましい。 In the method of manufacturing an absorbent article, in the elastic sheet bonding step, the other end of the elastic sheet is closer to the one side than the other end of the bonding area in the cross direction. Preferably, the stretchable sheets are joined in such a way that
　このような吸収性物品の製造方法によれば、伸縮性シートの他方側端部が捲れにくくなるため、当該領域における収縮力が設計値よりも大きくなってしまうことが抑制される。 According to the manufacturing method of such an absorbent article, the other side end of the stretchable sheet is less likely to be curled, and therefore, the contraction force in the region is suppressed to be larger than the design value.
　また、吸収性本体、及び、第１胴回り部を有する吸収性物品を製造する製造装置であって、前記第１胴回り部を構成する非伸縮性シートを搬送方向に搬送する、搬送部と、搬送されている前記非伸縮性シートの所定の領域に接着剤を設けて接着領域を形成する、接着領域形成部と、前記搬送方向に伸長させた状態の伸縮性シートを、前記接着領域を介して前記非伸縮性シートに接合する、伸縮性シート接合部と、を有し、前記伸縮性シート接合部は、前記搬送方向と交差する交差方向において、前記接着領域の一方側の端が、前記伸縮性シートの前記一方側の端よりも前記一方側に位置するように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造装置が明らかとなる。 Moreover, it is a manufacturing apparatus which manufactures an absorptive article which has an absorptive main part and the 1st waist part, and which conveys a non-stretchable sheet which constitutes the 1st waist part in a conveyance direction, and conveyance An adhesive area forming portion for forming an adhesive area by providing an adhesive in a predetermined area of the non-elastic sheet, and an elastic sheet in a state of being stretched in the transport direction via the adhesive area The stretchable sheet bonding portion has a stretchable sheet bonding portion to be bonded to the non-stretchable sheet, and in the stretchable sheet bonding portion, one end of the bonding area in the cross direction crossing the conveyance direction is the stretchable The stretchable sheet is joined so as to be positioned on the one side of the one side of the elastic sheet, the manufacturing apparatus of the absorbent article is clarified.
　このような吸収性物品の製造装置によれば、伸縮性シートが、交差方向の一方側の端まで接合されているため、当該一方側の端部領域において伸縮性シートの捲れが発生することを抑制した吸収性物品が製造可能となる。これにより、吸収性物品の胴回り開口部が広げやすくなり、また、着用者の胴回り部に対する過度な締め付けを防止できる。 According to the manufacturing apparatus of such an absorbent article, since the stretchable sheet is joined to the end on one side in the cross direction, curling of the stretchable sheet occurs in the end area on the one side The suppressed absorbent article can be manufactured. As a result, the waistline opening of the absorbent article can be easily spread, and excessive tightening of the waistline of the wearer can be prevented.
＝＝＝実施形態＝＝＝
　はじめに、本発明の製造方法によって製造される吸収性物品として、乳幼児用の使い捨ておむつを例に挙げて実施形態を説明する。ただし、本発明に係る吸収性物品は、乳幼児用の使い捨ておむつに限らず、大人用の使い捨ておむつや、生理用ショーツ等としても利用可能である。 === Embodiments ===
First, as an absorbent article manufactured by the manufacturing method of the present invention, an embodiment will be described by taking a disposable diaper for infants as an example. However, the absorbent article according to the present invention is not limited to disposable diapers for infants, and can be used as disposable diapers for adults, menstrual shorts, and the like.
＝＝＝使い捨ておむつ１の構成＝＝＝
　図１は、使い捨ておむつ１（以下「おむつ」）の斜視図である。図２は、展開かつ伸長状態のおむつ１の平面図である。図３は、図２のＩＩ線での断面図である。 === Configuration of disposable diaper 1 ===
FIG. 1 is a perspective view of a disposable diaper 1 (hereinafter, "diaper"). FIG. 2 is a plan view of the diaper 1 in the unfolded and stretched state. FIG. 3 is a cross-sectional view taken along line II of FIG.
　おむつ１は、図１に示すようなパンツ型の状態において、上下方向、及び、左右方向を有し、胴回り開口部ＢＨ、及び、一対の脚回り開口部ＬＨが形成されている。上下方向において、胴回り開口部ＢＨ側を上側とし、股下側を下側とする。また、図３に示すように、おむつ１を構成する資材が積層された方向を厚さ方向といい、厚さ方向において着用者に接触する側を肌側といい、着用者に接触しない側を非肌側という。 The diaper 1 has the up-down direction and the left-right direction in the pants-type state as shown in FIG. 1, and the waist opening BH and the pair of leg openings LH are formed. In the vertical direction, the waist opening BH side is the upper side, and the crotch side is the lower side. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are stacked is referred to as the thickness direction, and the side in contact with the wearer in the thickness direction is referred to as the skin side, and the side not in contact with the wearer. It is called the non-skin side.
　また、おむつ１は、平面視長方形状の３部材である、吸収性本体１０、腹側胴回り部２０、及び、背側胴回り部３０を有する。腹側胴回り部２０（第１胴回り部）は着用者の腹側部に当てられ、背側胴回り部３０（第２胴回り部）は着用者の背側部に当てられる。 Moreover, the diaper 1 has the absorptive main body 10, the ventral waistline part 20, and the back waistline part 30 which are three members of rectangular shape planar view. The ventral waistline 20 (first waistline) is applied to the belly side of the wearer, and the back waistline 30 (second waistline) is applied to the back side of the wearer.
　図２に示す展開状態のおむつ１において、腹側胴回り部２０及び背側胴回り部３０は、それらの長手方向がおむつ１の左右方向に沿うように配置されている。そして、左右方向における腹側胴回り部２０の中央部に、吸収性本体１０の長手方向一方側の端部が配置され、左右方向における背側胴回り部３０の中央部に、吸収性本体１０の長手方向他方側の端部が配置されている。 In the diaper 1 in the unfolded state shown in FIG. 2, the ventral-side waist portion 20 and the back-side waist portion 30 are arranged such that their longitudinal direction is along the left-right direction of the diaper 1. The end of the absorbent main body 10 on one side in the longitudinal direction is disposed at the center of the ventral-side waist portion 20 in the left-right direction, and the length of the absorbent main body 10 is at the center of the back-side waist portion 30 in the left-right direction. The other end of the direction is disposed.
　図２に示す展開状態のおむつ１において、吸収性本体１０の長手方向がおむつ１の上下方向に沿うように、吸収性本体１０が長手方向の略中央で二つ折りされ、おむつ１の左右方向における腹側胴回り部２０の両側端部と背側胴回り部３０の両側端部とが、熱溶着や超音波溶着等で接合されて、一対の接合領域２が形成されることにより、図１に示すパンツ型状態のおむつ１となる。 In the diaper 1 in the unfolded state shown in FIG. 2, the absorbent main body 10 is folded in half at the approximate center of the longitudinal direction so that the longitudinal direction of the absorbent main body 10 follows the vertical direction of the diaper 1. Both ends of the ventral waist portion 20 and both ends of the back waist portion 30 are joined by thermal welding, ultrasonic welding or the like to form a pair of joint regions 2 as shown in FIG. It becomes diaper 1 of a pants type state.
　吸収性本体１０は、図３に示すように、吸収体１１と、吸収体１１よりも肌側に配置された液透過性のトップシート１２と、吸収体１１よりも非肌側に配置された液不透過性のバックシート１３と、バックシート１３よりも非肌側に配置された外層シート１４とを有する。 As shown in FIG. 3, the absorbent main body 10 is disposed on the non-skin side of the absorbent body 11, the liquid-permeable top sheet 12 disposed on the skin side of the absorbent body 11, and the absorbent body 11. It has the liquid-impermeable back sheet 13 and the outer layer sheet 14 disposed on the non-skin side of the back sheet 13.
　吸収体１１は、尿等の排泄液を吸収して保持する吸収性コア１１Ａと、吸収性コア１１Ａを覆う液透過性のコアラップシート１１Ｂとを有する。吸収性コア１１Ａとしては、高吸収性ポリマー（ＳＡＰ）を含むパルプ等の液体吸収性繊維が所定の形状に成形されたものを例示できる。 Absorbent body 11 has absorptive core 11A which absorbs and holds waste fluid, such as urine, and liquid permeable core wrap sheet 11B which covers absorptive core 11A. Examples of the absorbent core 11A include those in which a liquid absorbent fiber such as pulp containing a high absorbent polymer (SAP) is molded into a predetermined shape.
　また、図２に示すように、左右方向における吸収性本体１０の両側部には、脚回り弾性部材１５が設けられており、おむつ１は着用者の脚回りにフィットする。脚回り弾性部材１５は、例えば、左右方向の内側に折り返されて２層となった外層シート１４の間において、吸収性本体１０の長手方向に伸長状態で固定されている。脚回り弾性部材１５としては、糸状弾性部材や伸縮性シートを例示できる。 Moreover, as shown in FIG. 2, the leg elastic member 15 is provided in the both sides of the absorptive main body 10 in the left-right direction, and the diaper 1 fits around a leg of a wearer. The leg elastic members 15 are fixed in a stretched state in the longitudinal direction of the absorbent main body 10, for example, between the outer layer sheet 14 which is folded back inward in the left-right direction to form two layers. As the leg elastic member 15, a thread-like elastic member or a stretchable sheet can be exemplified.
　腹側胴回り部２０及び背側胴回り部３０は、図３に示すように、それぞれ、内層シート２１，３１と、内層シート２１，３１に積層された外層シート２２，３２と、複数の糸状弾性部材２３，３３とを有する。 The ventral-side waist portion 20 and the back-side waist portion 30 are, as shown in FIG. 3, respectively, inner layer sheets 21 and 31, outer layer sheets 22 and 32 laminated on the inner layer sheets 21 and 31, and a plurality of filamentous elastic members 23 and 33.
　外層シート２２，３２は内層シート２１，３１よりも非肌側に配置されている。内層シート２１，３１及び外層シート２２，３２は吸収性本体１０よりも非肌側に配置されている。 The outer layer sheets 22 and 32 are arranged on the non-skin side of the inner layer sheets 21 and 31. The inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 are disposed on the non-skin side of the absorbent main body 10.
　内層シート２１，３１及び外層シート２２，３２単体は、おむつ１の左右方向の伸縮性を実質的に有さない非伸縮性シートである。内層シート２１，３１及び外層シート２２，３２としては、ＳＭＳ不織布（スパンボンド・メルトブローン・スパンボンド不織布）、スパンボンド不織布、エアスルー不織布、プラスチックシート、開孔プラスチックシート及びそれらのラミネートシートなどを用いることができる。 The inner layer sheets 21 and 31 and the outer layer sheets 22 and 32 alone are non-stretchable sheets that do not substantially have stretchability in the left-right direction of the diaper 1. Use SMS non-woven fabric (spun-bond / melt-blown / spun-bond non-woven fabric), spun-bond non-woven fabric, air-through non-woven fabric, plastic sheet, apertured plastic sheet, and laminate sheets thereof as inner layer sheets 21 and 31 and outer layer sheets 22 and 32 Can.
　複数の糸状弾性部材２３，３３は、内層シート２１，３１と外層シート２２，３２の間において、上下方向に並んで配置されるとともに、左右方向に伸長状態で固定されている。よって、腹側胴回り部２０及び背側胴回り部３０は左右方向に伸縮し、着用者の胴回りにフィットする。糸状弾性部材２３，３３としては、ゴムやスパンデックス等の糸状弾性部材を例示できる。 The plurality of thread-like elastic members 23 and 33 are arranged in the vertical direction between the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32, and fixed in an extended state in the horizontal direction. Therefore, the ventral waist part 20 and the back waist part 30 expand and contract in the left-right direction, and fit around the wearer's waist. As the thread-like elastic members 23, 33, thread-like elastic members such as rubber and spandex can be exemplified.
　背側胴回り部３０では、上端部から下端部に亘って糸状弾性部材３３が配置されている。一方、腹側胴回り部２０の上端部には、糸状弾性部材２３が配置されておらず、代わりに、左右方向に伸縮する伸縮性シート２４が配置されている。なお、本実施形態では、伸縮性シート２４の下端部と糸状弾性部材２３とが上下方向に重複して配置されているが、重複していなくても良い。 In the back waist part 30, the thread-like elastic member 33 is disposed from the upper end to the lower end. On the other hand, the thread-like elastic member 23 is not disposed at the upper end portion of the ventral-side waist portion 20, and instead, the stretchable sheet 24 which is expanded and contracted in the left-right direction is disposed. In the present embodiment, the lower end portion of the stretchable sheet 24 and the thread-like elastic member 23 are disposed to overlap in the vertical direction, but may not be disposed.
　このように腹側胴回り部２０の上端部に糸状弾性部材２３を配置せずに伸縮性シート２４を配置することで、腹側胴回り部２０の上端部が面で着用者に密着する。そのため、局所的な締め付けが抑えられ、伸縮部材の跡を残り難くすることができる。特に乳幼児の腹部はぽっこり出ているため、腹側胴回り部２０の締め付けを抑えることが好ましい。 By arranging the stretchable sheet 24 without disposing the thread-like elastic member 23 at the upper end of the ventral waist portion 20 in this manner, the upper end portion of the ventral waist portion 20 is in close contact with the wearer by the surface. Therefore, local tightening can be suppressed, and traces of the expansion and contraction member can be made difficult to remain. In particular, since the abdomen of an infant is popping out, it is preferable to suppress the tightening of the ventral torso part 20.
　また、おむつ１着用時の胴回り開口部ＢＨの広げやすさについては、胴回り部２０，３０の上端部の伸縮力が大きく影響する。伸縮性シート２４は、自然状態から伸長しやすく、伸長状態から収縮しにくい性質を有する。そのため、腹側胴回り部２０の上端部に伸縮性シート２４を配置することで、おむつ１着用時に胴回り開口部ＢＨを広げやすくなり、また、胴回り部２０，３０を着用者にフィットさせた後の腹部の締め付けを防止できる。 In addition, the stretchability of the upper end of the waist portion 20, 30 greatly influences the ease of opening the waist opening BH when the diaper 1 is worn. The stretchable sheet 24 has a property of being easily stretched from the natural state and difficult to shrink from the stretched state. Therefore, by arranging the stretchable sheet 24 at the upper end of the ventral waist portion 20, the waist opening BH can be easily spread when the diaper 1 is worn, and after the waist portions 20 and 30 are fitted to the wearer. It can prevent the tightening of the abdomen.
　伸縮性シート２４には、例えば、質量が１０～４０ｇ／ｍ２、より好ましくは、質量が１５～３０ｇ／ｍ２の弾性繊維から構成されたスパンボンド不織布、エアスルー不織布、ニードルパンチ不織布等、各種公知の製法によって製造された伸縮性の繊維不織布を用いることができる。弾性繊維は、熱可塑性エラストマーやゴムなどを原料とするものであって、特に熱可塑性エラストマーを原料として用いる場合には、通常の熱可塑性樹脂と同様に押出機を用いた溶融紡糸が可能であり、またそのようにして得られた繊維は熱融着させやすく、伸縮性の繊維不織布として好適である。熱可塑性エラストマーとしては、スチレン系エラストマー、オレフィン系エラストマー、ポリエステル系エラストマー、ポリウレタン系エラストマーを挙げることができる。これらは、一種を単独で又は二種以上を組み合わせて用いることができる。伸縮性シートは少なくとも左右方向に弾性を示すものであれば良く、二方向以上に弾性を示すものであっても良い。伸縮性シート２４の左右方向の伸長倍率は１．２倍～３.０倍程度が好ましい。 The stretchable sheet 24 may be, for example, various types such as spunbonded non-woven fabric, air-through non-woven fabric, needle punched non-woven fabric, etc. composed of elastic fibers having a mass of 10 to 40 g / m 2 , more preferably 15 to 30 g / m 2. A stretchable non-woven fabric produced by a known method can be used. The elastic fiber is made of a thermoplastic elastomer, rubber or the like as a raw material, and particularly when a thermoplastic elastomer is used as a raw material, melt spinning using an extruder is possible like an ordinary thermoplastic resin. Also, the fibers thus obtained are easily heat-sealed and are suitable as stretchable non-woven fibers. Examples of the thermoplastic elastomer include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, and polyurethane-based elastomers. These can be used singly or in combination of two or more. The stretchable sheet may be any sheet that exhibits elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretching ratio in the left-right direction of the stretchable sheet 24 is preferably about 1.2 to 3.0.
＝＝＝腹側胴回り部２０の製造方法＝＝＝
　上述したように、おむつ１は、腹側胴回り部２０及び背側胴回り部３０、及び、両者の間に架け渡されるようにして配置された吸収性本体１０によって構成されている。おむつ１の製造工程では、これら各部（１０，２０，３０）の原料となるシート部材等をそれぞれ搬送方向に沿って搬送させながら、接合処理や切断処理等の各種処理を施すことによって、おむつ１を製造する。以下では、おむつ１の製造工程において、伸縮性シート２４の捲れが生じにくい腹側胴回り部２０を製造する方法について説明する。 === Manufacturing method of ventral side waist portion 20 ===
As described above, the diaper 1 is configured by the ventral waist portion 20 and the back waist portion 30, and the absorbent main body 10 disposed so as to be bridged therebetween. In the manufacturing process of the diaper 1, the diaper 1 is subjected to various treatments such as bonding treatment and cutting treatment while the sheet members and the like serving as the raw materials of the respective portions (10, 20, 30) are conveyed along the conveying direction. Manufacture. Below, in the manufacturing process of the diapar 1, the method to manufacture the belly side waistline part 20 which the bending of the elastic sheet 24 does not produce easily is demonstrated.
　図４は、腹側胴回り部２０の製造工程の一部について示すフロー図である。図５は、腹側胴回り部２０の搬送ライン（搬送部）を示した概略図であり、図４で示される各工程において実施される処理内容を説明する図である。図５では、搬送ラインの各工程について概略的に表した側面図と、各工程における腹側胴回り部２０（外装連続シート２５ｓ）の様子を表した平面図とが描かれている。 FIG. 4 is a flowchart showing a part of the manufacturing process of the ventral torso part 20. As shown in FIG. FIG. 5 is a schematic view showing a transport line (transport section) of the ventral-side waist section 20, and is a view for explaining the processing content carried out in each step shown in FIG. In FIG. 5, a side view schematically showing each process of the transport line and a plan view showing a state of the belly-side waist portion 20 (the armored continuous sheet 25 s) in each process are drawn.
　本実施形態では、図５に示されるような搬送部によって、腹側胴回り部２０の基材シート（非伸縮性シート）が所定の搬送方向に沿って所定の搬送速度で搬送される間に（搬送工程）、Ｓ１０１～Ｓ１０４の各工程が実施される。腹側胴回り部２０の「基材シート」とは、糸状弾性部材２３を挟み込んだ状態で厚さ方向に積層された外層シート２２及び内層シート２１が、図２における左右方向に複数繋がった状態で連続してなる外装連続シート２５ｓである。外装連続シート２５ｓと同様の構造を有するシート部材の製造方法については公知であるため、ここでは説明を省略する。 In the present embodiment, while the base sheet (non-stretchable sheet) of the belly-side waist portion 20 is transported at a predetermined transport speed along the predetermined transport direction by the transport unit as illustrated in FIG. Conveying step), each step of S101 to S104 is performed. The “base sheet” of the belly-side waist portion 20 refers to a plurality of the outer layer sheet 22 and the inner layer sheet 21 stacked in the thickness direction with the thread-like elastic member 23 sandwiched therebetween in the lateral direction in FIG. It is a continuous exterior continuous sheet 25s. The manufacturing method of the sheet member having the same structure as that of the external covering continuous sheet 25s is known, and thus the description thereof is omitted here.
　また、以下では、外装連続シート２５ｓが図２における左右方向に沿って搬送される方向を搬送方向とし、搬送方向と交差する方向を交差方向とする。なお、搬送方向に連続する外装連続シート２５ｓは、おむつ１製造過程のいずれかの工程において、交差方向（図２の長手方向若しくは上下方向に相当する方向）に沿って切断されることにより、製品単位の腹側胴回り部２０（おむつ１）が形成される。 Further, hereinafter, the direction in which the exterior continuous sheet 25s is conveyed along the left-right direction in FIG. 2 is referred to as a conveyance direction, and the direction intersecting the conveyance direction is referred to as a cross direction. In addition, the exterior continuous sheet 25s continuous in the conveyance direction is a product by being cut along a cross direction (direction corresponding to the longitudinal direction or the vertical direction in FIG. 2) in any process of the diaper 1 manufacturing process. A ventral waistline 20 (diaper 1) of the unit is formed.
　はじめに、搬送部によって搬送方向の上流側から下流側に搬送される基材シート（外装連続シート２５ｓ）の所定の領域に、ホットメルト式接着剤等の接着剤を設けることで接着領域４１を形成する、接着領域形成工程が行われる（Ｓ１０１）。なお、本明細書中では、後述する第２接着領域４３と区別するために、接着領域４１を「第１接着領域４１」とも呼ぶ。また、第１接着領域４１を形成する工程を「第１接着領域形成工程（Ｓ１０１）」とも呼ぶ。 First, an adhesion region 41 is formed by providing an adhesive such as a hot melt adhesive on a predetermined area of a base sheet (outer continuous sheet 25s) conveyed from the upstream side to the downstream side in the conveyance direction by the conveyance section. An adhesion area formation process is performed (S101). In addition, in this specification, in order to distinguish with the 2nd adhesion field 43 mentioned below, adhesion field 41 is also called "the 1st adhesion field 41." Moreover, the process of forming the 1st adhesion field 41 is also called "the 1st adhesion field formation process (S101)."
　図６は、図５のＡ－Ａ断面について表す図であり、外装連続シート２５ｓの表面に第１接着領域４１が形成された状態を表す概略断面図である。図５及び図６に示されるように、第１接着領域４１は、搬送方向（左右方向）に沿って形成される略長方形状の領域である。搬送されている外装連続シート２５ｓの当該長方形状の領域に対して、搬送部の上方に設けられた接着領域形成部から、ほぼ均等の坪量で接着剤が塗布される。また、第１接着領域４１は、図６のように交差方向に所定の幅を有しており、交差方向の一方側（図２の上下方向における上側に相当）の端を端４１ａとし、他方側の端（図２の上下方向における下側に相当）の端を端４１ｂとする。なお、図６では、第１接着領域４１が、外装連続シート２５ｓのうち内層シート２１の交差方向の一方側の端２１ａを交差方向に跨ぐように形成されている。すなわち、交差方向において、第１接着領域４１の端４１ａ及び端４１ａの間に内層シート２１の端２１ａが位置するように、第１接着領域４１が形成される。 FIG. 6 is a view showing the AA cross section of FIG. 5 and is a schematic cross-sectional view showing a state in which the first bonding region 41 is formed on the surface of the exterior continuous sheet 25s. As shown in FIGS. 5 and 6, the first bonding area 41 is a substantially rectangular area formed along the transport direction (left-right direction). An adhesive is applied to the rectangular area of the continuous covering sheet 25s being conveyed, with an approximately even basis weight, from an adhesion area forming part provided above the conveying part. The first bonding area 41 has a predetermined width in the cross direction as shown in FIG. 6, and the end of one side in the cross direction (corresponding to the upper side in the vertical direction in FIG. 2) is an end 41a, The end of the side end (corresponding to the lower side in the vertical direction in FIG. 2) is an end 41 b. In addition, in FIG. 6, the 1st adhesion | attachment area | region 41 is formed so that the edge 21a of the one side of the cross direction of the inner-layer sheet 21 is straddled in a cross direction among the exterior | packing continuous sheets 25s. That is, the first bonding area 41 is formed such that the end 21 a of the inner layer sheet 21 is located between the end 41 a and the end 41 a of the first bonding area 41 in the cross direction.
　次いで、搬送方向に伸長させた状態の伸縮性シート２４を、第１接着領域４１を介して外装連続シート２５ｓに接合する、伸縮性シート接合工程が行われる（Ｓ１０２）。伸縮性シート接合工程は、伸縮性シート接合部により実施され、上述したスパンボンド不織布等にギア延伸等の適宜な延伸処理を施しつつ、搬送方向に伸長させた状態で搬送し、外装連続シート２５ｓに合流させて接合する。その際、外装連続シート２５ｓ上で第１接着領域４１が形成されている領域と重なるように伸縮性シート２４を配置することにより、伸縮性シート２４が外装連続シート２５ｓに接合される。 Next, a stretchable sheet bonding step is performed in which the stretchable sheet 24 in a state of being stretched in the transport direction is bonded to the outer covering continuous sheet 25s via the first bonding region 41 (S102). The stretchable sheet bonding step is carried out by the stretchable sheet bonding portion, and the spun bond non-woven fabric or the like described above is conveyed in a state of being stretched in the transport direction while performing appropriate stretching processing such as gear stretching. Join and join. At that time, the stretchable sheet 24 is joined to the armored continuous sheet 25s by arranging the elastic sheet 24 so as to overlap with the area where the first bonding area 41 is formed on the armored continuous sheet 25s.
　図７は、図５のＢ－Ｂ断面について表す図であり、第１接着領域４１を介して伸縮性シート２４が外装連続シート２５ｓに接合された状態を表す概略断面図である。本伸縮性シート接合工程では、交差方向において、第１接着領域４１の一方側の端４１ａが、伸縮性シート２４の一方側の端２４ａよりも一方側に位置するように、伸縮性シート２４が接合される。したがって、Ｓ１０２の工程において、交差方向の一方側では、第１接着領域４１が伸縮性シート２４の端２４ａよりも外側（一方側）にはみ出した状態となっている。これにより、伸縮性シート２４の端２４ａが外装連続シート２５ｓにしっかりと接合される。 FIG. 7 is a view showing the B-B cross section of FIG. 5 and is a schematic cross-sectional view showing a state in which the stretchable sheet 24 is joined to the outer covering continuous sheet 25s via the first bonding area 41. In the elastic sheet bonding step, the elastic sheet 24 is positioned such that the end 41 a of the first bonding area 41 is located on one side of the end 24 a of the elastic sheet 24 in the cross direction. It is joined. Therefore, in the process of S102, the first adhesion region 41 is in a state of protruding outside (one side) than the end 24a of the stretchable sheet 24 on one side in the cross direction. Thereby, the end 24a of the stretchable sheet 24 is firmly joined to the exterior continuous sheet 25s.
　図８は、比較例として、交差方向において、伸縮性シート２４の一方側の端２４ａが、第１接着領域４１の一方側の端４１ａよりも一方側に位置するように、伸縮性シート２４が接合された場合について表す概略断面図である。比較例では、伸縮性シート２４のうち、第１接着領域４１よりも一方側にはみ出した部分（端２４ａを含む）は、外装連続シート２５ｓと接合されていない。すなわち、伸縮性シート２４には、外装連続シート２５ｓと接合されることによって剛性が高くなっている部分と、外装連続シート２５ｓと接合されず、剛性が低い部分とが存在する。そのため、伸縮性シート２４の伸長状態が解除されると、剛性が高い部分と低い部分とで収縮量に差が生じ、剛性が低い端部領域（端４１ａ）が厚さ方向に立ち上がったり交差方向に折り返されたりして、所謂「捲れ」が生じやすくなる。 In FIG. 8, as a comparative example, the stretchable sheet 24 is positioned such that the end 24a on one side of the stretchable sheet 24 is positioned on one side of the end 41a on one side of the first bonding region 41 in the cross direction. It is a schematic sectional drawing represented about the case where it joins. In the comparative example, a portion (including the end 24 a) of the stretchable sheet 24 that protrudes to one side of the first bonding area 41 is not joined to the exterior continuous sheet 25 s. That is, in the stretchable sheet 24, there are a portion where the rigidity is high by being joined with the exterior continuous sheet 25s, and a portion where the rigidity is not joined with the exterior continuous sheet 25s. Therefore, when the stretchable state of the stretchable sheet 24 is released, a difference occurs in the amount of contraction between the portion with high rigidity and the portion with low rigidity, and the end region (end 41a) with low rigidity rises in the thickness direction or cross direction In other words, so-called “spit” is likely to occur.
　図８では、伸縮性シート２４のうち、第１接着領域４１よりも交差方向の一方側はみ出した部分が他方側に折り返される（捲れる）ことによって、折り返し部２４１が形成されている。折り返し部２４１では、伸縮性シート２４が厚さ方向に積層された状態となっているため、搬送方向の伸縮力が増加し、おむつ１着用時において、着用者の胴回りにおける締め付けが局所的にきつくなったり、開口部ＢＨを広げにくくなったりするおそれがある。 In FIG. 8, a folded-back portion 241 is formed by folding back (twisting) a portion of the stretchable sheet 24 which protrudes in the cross direction from the first bonding region 41 to the other side. In the folded portion 241, since the stretchable sheet 24 is laminated in the thickness direction, the stretching force in the transport direction is increased, and the tightening around the waist of the wearer is locally tight when the diaper 1 is worn. Or it may be difficult to widen the opening BH.
　これに対して、本実施形態では、伸縮性シート２４が、交差方向の一方側の端２４ａにおいて外装連続シート２５ｓと接合されているため、交差方向の一方側端部で捲れが発生することが抑制される。これにより、腹側胴回り部２０の交差方向の一方側端部（上下方向の上端部）において、搬送方向（左右方向）の収縮力が、設計した力よりも大きくなってしまうことが抑制される。よって、おむつ１着用時の胴回り開口部ＢＨの広げやすさを維持でき、また、着用者の胴回り部に対する過度な締め付けを防止できる。 On the other hand, in the present embodiment, since the stretchable sheet 24 is joined to the exterior continuous sheet 25s at the end 24a on one side in the cross direction, curling may occur at one end on the one side in the cross direction. Be suppressed. As a result, at one side end (upper end in the vertical direction) in the cross direction of the belly-side waist portion 20, the contraction force in the transport direction (left-right direction) is suppressed to be greater than the designed force. . Therefore, the ease of opening the waistline opening BH when the diaper 1 is worn can be maintained, and excessive tightening of the waistline of the wearer can be prevented.
　一方、伸縮性シート接合工程（Ｓ１０２）では、交差方向において、伸縮性シート２４の他方側の端２４ｂが、第１接着領域４１の他方側の端４１ｂよりも他方側に位置するように、伸縮性シート２４が接合される。すなわち、交差方向の他方側では、第１接着領域４１が伸縮性シート２４の端２４ｂからはみ出していない。伸縮性シート２４の交差方向の他方側の端部（図２において上下方向の下側端部）は、吸収性本体１０の配置や外層シート２２の端部２２１の長さが変更された場合、着用者の肌と直接接触する可能性のある領域である。そのため、仮に、当該領域から接着剤（第１接着領域４１）がはみ出していた場合、着用者の身体に接着剤が付着してしまうおそれがある。そこで、本実施形態では、第１接着領域４１が伸縮性シート２４の端２４ｂからはみ出さないように伸縮性シート２４を配置することにより、着用者の身体に接着剤が付着してしまうことを抑制している。 On the other hand, in the stretchable sheet bonding step (S102), the stretchable sheet 24 is stretched so that the other end 24b of the stretchable sheet 24 is positioned on the other side of the other end 41b of the first bonding region 41 in the cross direction. Sheet 24 is joined. That is, on the other side in the cross direction, the first bonding area 41 does not protrude from the end 24 b of the stretchable sheet 24. When the arrangement of the absorbent main body 10 and the length of the end 221 of the outer layer sheet 22 are changed at the other end of the stretchable sheet 24 in the cross direction (the lower end in the vertical direction in FIG. 2) An area that may come in direct contact with the wearer's skin. Therefore, if the adhesive (the first adhesion area 41) protrudes from the area, the adhesive may adhere to the body of the wearer. Therefore, in the present embodiment, the adhesive is attached to the body of the wearer by arranging the stretchable sheet 24 so that the first bonding area 41 does not protrude from the end 24b of the stretchable sheet 24. It is suppressing.
　逆に、交差方向において、伸縮性シート２４の他方側の端２４ｂが、第１接着領域４１の他方側の端４１ｂよりも一方側に位置するように、伸縮性シート２４が接合されるようにしても良い(不図示)。この場合、交差方向の他方側において、第１接着領域４１が伸縮性シート２４の端２４ｂからはみ出すことになるが、このような構成であれば、図８で説明したのと同様に、伸縮性シート２４の他方側端部が捲れにくくなるため、当該領域における収縮力が設計値よりも大きくなってしまうことが抑制される。なお、第１接着領域４１のうち、伸縮シート２４の端２４ｂからはみ出した部分については、後述するカバー工程（Ｓ１０４）等において、異なるシート部材（例えば、カバーシート２６や、折り返された外層シート２２）が接合される。したがって、第１接着領域４１を構成する接着剤が外部に露出する可能性は低く、着用者の肌に接着剤が付着してしまう等の問題は生じにくい。 Conversely, the stretchable sheet 24 is bonded such that the other end 24b of the stretchable sheet 24 is positioned on one side of the other end 41b of the first bonding area 41 in the cross direction. It may be (not shown). In this case, on the other side in the cross direction, the first bonding area 41 protrudes from the end 24 b of the stretchable sheet 24. With such a configuration, the stretchability is the same as described in FIG. 8. Since the other side end of the sheet 24 is less likely to be turned, it is possible to suppress the contraction force in the area from becoming larger than the design value. A portion of the first bonding area 41 that protrudes from the end 24 b of the stretchable sheet 24 is a different sheet member (for example, the cover sheet 26 or the folded outer layer sheet 22 in a cover process (S 104) and the like described later. ) Are joined. Therefore, the possibility that the adhesive constituting the first adhesive region 41 is exposed to the outside is low, and problems such as adhesion of the adhesive to the skin of the wearer are unlikely to occur.
　次いで、伸縮性シート２４の所定の領域に、ホットメルト式接着剤等の接着剤を設けて第２接着領域４３を形成する、第２接着領域形成工程が行われる（Ｓ１０３）。図９は、図５のＣ－Ｃ断面について表す図であり、伸縮性シート２４に第２接着領域４３が形成された状態を表す概略断面図である。 Next, a second bonding area forming step is performed in which an adhesive such as a hot melt adhesive is provided in a predetermined area of the stretchable sheet 24 to form a second bonding area 43 (S103). FIG. 9 is a view showing the CC cross section of FIG. 5 and is a schematic cross section showing a state in which the second bonding area 43 is formed in the stretchable sheet 24. As shown in FIG.
　図９に示されるように、第２接着領域４３は、伸縮性シート２４のうち第１接着領域４１によって接合された面とは反対側の面にホットメルト接着剤等の接着剤を設けることによって形成される。本実施形態において、第２接着領域４３は、搬送方向に沿った略帯状（長方形状）の領域である。具体的には、図５に示されるように、搬送方向に沿ってスパイラルパターンやΩパターンで接着剤を塗布することにより、第２接着領域４３が形成される。なお、第２接着領域４３は、伸縮性シート２４（伸縮不織布）に接着剤を塗布することによって形成されるが、伸縮不織布の表面は粗密を有する構造であるため、接着剤が塗布される範囲が広すぎると伸縮不織布の反対面側に接着剤が染み出してしまうおそれがある。そこで、搬送方向に沿ったスパイラルパターン等で接着剤を塗布することにより、伸縮不織布中の限られた領域にのみ接着剤が設けられるようにしている。 As shown in FIG. 9, the second adhesive area 43 is formed by providing an adhesive such as a hot melt adhesive on the surface of the stretchable sheet 24 opposite to the surface bonded by the first adhesive area 41. It is formed. In the present embodiment, the second bonding area 43 is a substantially band-like (rectangular) area along the transport direction. Specifically, as shown in FIG. 5, the second adhesive region 43 is formed by applying an adhesive in a spiral pattern or Ω pattern along the transport direction. Although the second adhesion region 43 is formed by applying an adhesive to the stretchable sheet 24 (stretchable non-woven fabric), the surface of the stretchable non-woven fabric has a rough and dense structure, so the range to which the adhesive is applied If the width of the stretchable nonwoven fabric is too large, the adhesive may exude on the opposite side of the stretchable nonwoven fabric. Therefore, by applying the adhesive in a spiral pattern or the like along the transport direction, the adhesive is provided only in a limited area in the stretchable nonwoven fabric.
　また、第２接着領域形成工程（Ｓ１０３）では、第２接着領域４３の交差方向の一方側の端４３ａが、伸縮性シート２４の交差方向の一方側の端２４ａよりも交差方向の他方側に位置するように、第２接着領域４３が形成される。すなわち、伸縮性シート２４の一方側の端２４ａよりも外側にはみ出さないように、接着剤が塗布される。上述したように、第１接着領域４１は、伸縮性シート２４の一方側の端２４ａよりも外側にはみ出して形成されている。そのため、さらに第２接着領域４３が伸縮性シート２４の一方側の端２４ａよりも外側にはみ出して形成された場合、端２４ａよりも交差方向の一方側の領域において第１接着領域４１と第２接着領域４３とが重複して形成され、当該領域において接着剤が過多になるおそれがある。この場合、腹側胴回り部２０において接着剤が染み出したり、不織布が硬化したりして、着用者に不快感を生じさせる原因となる。そこで、本実施形態では、伸縮性シート２４の端２４ａよりも外側にはみ出さないように、第２接着領域４３を形成することにより、接着剤の染み出し等を抑制している。 In the second bonding area forming step (S103), one end 43a of the second bonding area 43 in the cross direction is closer to the other side in the cross direction than the one end 24a of the elastic sheet 24 in the cross direction. A second bonding area 43 is formed to be positioned. That is, the adhesive is applied so as not to protrude outside the end 24 a on one side of the stretchable sheet 24. As described above, the first bonding area 41 is formed to protrude outward beyond the end 24 a on one side of the stretchable sheet 24. Therefore, when the second bonding area 43 is further formed outside the one end 24 a of the stretchable sheet 24, the first bonding area 41 and the second bonding area 41 are formed in the area on one side in the cross direction than the end 24 a. The adhesion area 43 is formed to overlap, and there is a possibility that the adhesive in this area is excessive. In this case, the adhesive exudes in the ventral waist part 20 and the non-woven fabric hardens to cause discomfort to the wearer. Therefore, in the present embodiment, the second adhesive region 43 is formed so as not to protrude outside the end 24 a of the stretchable sheet 24, thereby suppressing the bleeding of the adhesive and the like.
　また、第２接着領域４３のうち、接着剤が塗布されている部分における接着剤の坪量が、第１接着領域４１のうち、接着剤が塗布されている部分における接着剤の坪量よりも大きくなるように、第２接着領域４３が形成される。なお、第２接着領域４３のうち接着剤が塗布されている部分とは、図９の斜線部で表された第２接着領域４３の領域中で、スパイラルパターン等によって搬送方向に沿って接着剤が実際に塗布されている部分である。一方、第１接着領域４１のうち、接着剤が塗布されている部分とは、図６の斜線部で表された第１接着領域４１の全体である。 Further, the basis weight of the adhesive in the portion to which the adhesive is applied in the second adhesive region 43 is higher than the basis weight of the adhesive in the portion to which the adhesive is applied in the first adhesive region 41. The second bonding area 43 is formed to be large. The portion of the second adhesive region 43 to which the adhesive is applied is the adhesive along the transport direction by a spiral pattern or the like in the region of the second adhesive region 43 represented by the hatched portion in FIG. Is the part that is actually applied. On the other hand, the portion of the first bonding area 41 to which the adhesive is applied is the whole of the first bonding area 41 represented by the hatched portion in FIG.
　第２接着領域４３は、次工程（Ｓ１０４）において、シート部材（例えば、外層シート２２）を接合するために形成される。当該シート部材は、おむつ１の着用時に着用者の最も肌側に配置される部材である。そのため、着用者の肌との間に生じる摩擦力等の外力の影響で、該シート部材と伸縮性シート２４との接合が剥がれてしまうおそれがある。そこで、本実施形態では、第２接着領域４３に設けられる接着剤の坪量を高くすることにより、接合強度を局所的に高め、シート部材が剥がれ難くしている。一方、第１接着領域４１は、広範囲に亘ってほぼ均一に接着剤が設けられているため、坪量を低くしても、第１接着領域４１全体として接合強度を確保できるようにしている。 The second bonding area 43 is formed to bond the sheet member (for example, the outer layer sheet 22) in the next step (S104). The said sheet | seat member is a member arrange | positioned at the wearer's most skin side at the time of wear of the diapar 1. FIG. Therefore, there is a possibility that bonding between the sheet member and the stretchable sheet 24 may be peeled off under the influence of an external force such as a frictional force generated between the wearer's skin and the like. Therefore, in the present embodiment, by increasing the basis weight of the adhesive provided in the second bonding area 43, the bonding strength is locally increased to make the sheet member difficult to peel off. On the other hand, since the adhesive is provided substantially uniformly over a wide area, the first adhesive area 41 can ensure the bonding strength of the entire first adhesive area 41 even if the basis weight is low.
　次いで、第１接着領域４１及び第２接着領域４３を介して所定のシート部材を接合し、伸縮性シート２４を厚さ方向の肌側からカバーする、カバー工程が行われる（Ｓ１０４）。本実施形態では、所定のシート部材として、外装連続シート２５ｓを構成している外層シート２２が用いられる。 Next, a covering process is performed, in which a predetermined sheet member is joined via the first bonding area 41 and the second bonding area 43, and the stretchable sheet 24 is covered from the skin side in the thickness direction (S104). In the present embodiment, the outer layer sheet 22 constituting the exterior continuous sheet 25s is used as the predetermined sheet member.
　図１０は、図５のＤ－Ｄ断面について表す図であり、外層シート２２によって、伸縮性シート２４がカバーされた状態を表す概略断面図である。図６～図９に示されるように、外層シート２２（外装連続シート２５ｓ）は、交差方向において、第１接着領域４１の一方側の端４１ａよりも一方側に突出した部分（端部２２１とする）を有している。本工程（Ｓ１０４）では、外層シート２２のうち、交差方向の一方側に突出している端部２２１を、交差方向の所定位置Ｆ１にて交差方向の他方側に折り返し、折り返された端部２２１が伸縮性シート２４を肌側（図１０の上側）から覆うようにする。なお、所定位置Ｆ１は、交差方向において、伸縮性シート２４の一方側の端２４ａよりも一方側のいずれかの位置であり、図１０では、第１接着領域４１の一方側の端４１ａとほぼ同じ位置であるものとする。 FIG. 10 is a view showing the DD cross section of FIG. 5 and is a schematic cross section showing a state in which the stretchable sheet 24 is covered by the outer layer sheet 22. As shown in FIG. As shown in FIGS. 6 to 9, the outer layer sheet 22 (outer covering continuous sheet 25 s) protrudes to one side from the end 41 a on one side of the first bonding region 41 in the cross direction (the end 221 and Yes). In this step (S104), the end 221 of the outer layer sheet 22 that protrudes to one side in the cross direction is folded back to the other side in the cross direction at a predetermined position F1 in the cross direction, and the end 221 is folded back. The stretchable sheet 24 is covered from the skin side (upper side in FIG. 10). The predetermined position F1 is any position on one side of the end 24a of the stretchable sheet 24 in the cross direction, and in FIG. 10, the predetermined position F1 substantially corresponds to the one end 41a of the first bonding region 41. It shall be the same position.
　折り返された外層シート２２の端部２２１は、第１接着領域４１のうち、交差方向において伸縮性シート２４の一方側の端２４ａから一方側にはみ出している部分に接合される。すなわち、外層シート２２同士が第１接着領域４１の一部によって接合される。これにより、折り返された端部２２１が元に戻ってしまうことが抑制される。また、第１接着領域４１の交差方向における全領域が、いずれかのシート部材によって覆われた状態となり（図１０参照）、第１接着領域４１を形成している接着剤が外部に露出しなくなるため、着用者の肌や他の部材（例えば側胴回り部３０や吸収性本体１０等）に接着剤が付着してしまうことが抑制される。 The end 221 of the folded outer layer sheet 22 is joined to a portion of the first bonding area 41 that protrudes from one end 24 a of the stretchable sheet 24 in the cross direction to one side. That is, the outer layer sheets 22 are joined by a part of the first bonding area 41. As a result, the return end 221 is prevented from returning to the original state. Further, the entire area in the cross direction of the first bonding area 41 is covered by any sheet member (see FIG. 10), and the adhesive forming the first bonding area 41 is not exposed to the outside Therefore, adhesion of the adhesive to the skin of the wearer and other members (for example, the side waist portion 30 and the absorbent main body 10) is suppressed.
　なお、所定位置Ｆ１は、腹側胴回り部２０の上端となる位置である（図３参照）。本実施形態では、この所定位置Ｆ１にて外層シート２２を折り返していることにより第１接着領域４１を形成している接着剤が所定位置Ｆ１よりも交差方向の一方側に移動することが制限される。すなわち、おむつ１をパンツ型形状に形成した際に、腹側胴回り部２０の上端から接着剤がはみ出してしまうことが抑制される。これにより、着用者に不快感を与えにくくなる。 The predetermined position F1 is a position to be the upper end of the belly-side waist portion 20 (see FIG. 3). In the present embodiment, by folding the outer layer sheet 22 at the predetermined position F1, the movement of the adhesive forming the first adhesive region 41 to one side in the cross direction from the predetermined position F1 is restricted. Ru. That is, when the diaper 1 is formed into a pants-like shape, the adhesive is prevented from protruding from the upper end of the belly-side waist portion 20. This makes the wearer less likely to feel discomfort.
　また、折り返された外層シート２２の端部２２１は、第２接着領域４３に接合される。上述したように第２接着領域４３では、接着剤の坪量が高く、端部２２１を接合する際の接合強度を高くすることができる。したがって、折り返された端部２２１が伸縮性シート２４に積層された状態でしっかりと固定され、端部２２１の折り返し状態が元に戻ってしまうことが抑制される。 Further, the end 221 of the folded outer layer sheet 22 is bonded to the second bonding area 43. As described above, in the second bonding area 43, the basis weight of the adhesive is high, and the bonding strength when bonding the end portion 221 can be increased. Therefore, the folded back end 221 is firmly fixed to the stretchable sheet 24 in a stacked state, and the folded back state of the end 221 is suppressed from being returned to the original state.
　このとき、折り返された端部２２１の端２２１ａ（すなわち、折り返された端部２２１の自由端側の端）は、交差方向において、第２接着領域４３の他方側の端４３ｂよりも他方側に位置している。したがって、第２接着領域４３の全体が端部２２１によって覆われるようになり、端部２２１から接着剤がはみ出しにくくなる。また、端２２１ａに接着剤が付着していないため、該端２２１ａ付近の領域が所謂ドライエッジとなって柔軟に保たれる。よって、おむつ１着用時における肌触りが良好なものとなる。 At this time, the end 221a of the folded back end 221 (that is, the free end side of the folded back end 221) is on the other side of the other end 43b of the second bonding region 43 in the cross direction. positioned. Therefore, the entire second bonding region 43 is covered by the end 221, and the adhesive is less likely to protrude from the end 221. In addition, since the adhesive is not attached to the end 221a, the area near the end 221a becomes a so-called dry edge and is kept flexible. Therefore, the touch when wearing the diaper 1 is good.
　Ｓ１０４の工程の後、吸収性本体１０を接合する工程や、外装連続シート２５ｓを切断する工程等が実施され、おむつ１が完成する。なお、Ｓ１０３の工程とＳ１０４の工程との間に、外装連続シート２５ｓに吸収性本体１０を接合する工程が実施されるのであっても良い。 After the process of S104, the process of joining the absorptive main body 10, the process of cutting the exterior continuous sheet 25s, etc. are implemented, and the diaper 1 is completed. In addition, the process of joining the absorptive main body 10 to 25 S of exterior | packing continuous sheets may be implemented between the process of S103, and the process of S104.
　＜変形例＞
　上述の実施形態では、Ｓ１０４のカバー工程において、交差方向の所定位置Ｆ１にて折り返された外層シート２２によって、伸縮性シート２４が肌側から覆われていたが、他のシート部材によって伸縮性シート２４が覆われるように変形しても良い。図１１は、Ｓ１０４の変形例について表す概略断面図である。 <Modification>
In the above-described embodiment, the stretchable sheet 24 is covered from the skin side by the outer layer sheet 22 folded back at the predetermined position F1 in the cross direction in the cover step of S104. You may deform so that 24 may be covered. FIG. 11 is a schematic cross-sectional view showing a modification of S104.
　変形例では、外層シート２２が折り返されず、代わりに、非伸縮性シートであるカバーシート２６が設けられる。カバーシート２６としては、外層シート２２と同様の部材（例えば、ＳＭＳ不織布等）を用いることができる。交差方向において、カバーシート２６の一方側の端２６ａは、少なくとも第１接着領域４１の一方側の端４１ａよりも一方側に位置する。また、交差方向において、カバーシート２６の他方側の端２６ｂは、少なくとも第２接着領域４３の他方側の端４３ｂよりも他方側に位置する。そして、カバーシート２６が、第１接着領域４１のうち、交差方向において伸縮性シート２４の一方側の端２４ａから一方側にはみ出している部分に接合されると共に、第２接着領域４３に接合される。 In a variant, the outer layer sheet 22 is not folded back, but instead a cover sheet 26, which is a non-stretchable sheet, is provided. As the cover sheet 26, the same member as the outer layer sheet 22 (for example, SMS non-woven fabric etc.) can be used. In the cross direction, the end 26 a on one side of the cover sheet 26 is located on one side of the end 41 a on one side of the first bonding area 41. Further, in the cross direction, the other end 26 b of the cover sheet 26 is positioned on the other side of at least the other end 43 b of the second bonding area 43. Then, the cover sheet 26 is joined to a portion of the first bonding area 41 which protrudes from one end 24 a of the stretchable sheet 24 in the cross direction to one side and is joined to the second bonding area 43. Ru.
　このような変形例によれば、接着剤が外部に露出しないため、着用者の肌や他の部材に接着剤が付着しにくく、また、外層シート２２を折り曲げる工程を省略することが可能となる。さらに、カバーシート２６の大きさや配置を自由に変更することができるため、デザインやサイズが異なる種々のおむつを容易に製造することができる。 According to such a modification, since the adhesive is not exposed to the outside, the adhesive does not easily adhere to the wearer's skin or other members, and the step of bending the outer layer sheet 22 can be omitted. . Furthermore, since the size and arrangement of the cover sheet 26 can be freely changed, various diapers having different designs and sizes can be easily manufactured.
＝＝＝その他の実施の形態＝＝＝
　以上、本発明の実施形態について説明したが、上記の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。また、本発明は、その趣旨を逸脱することなく、変更や改良され得るとともに、本発明にはその等価物が含まれるのはいうまでもない。 === Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, it goes without saying that the present invention can be modified or improved without departing from the gist thereof, and that the present invention includes equivalents thereof.
　例えば、腹側胴回り部２０の上端部に伸縮性シート２４を配置するに限らない。上下方向における腹側胴回り部２０の何れの位置に伸縮性シート２４を配置しても良い。また、背側胴回り部３０（第１胴回り部）が伸縮性シートを有し、腹側胴回り部２０（第２胴回り部）が伸縮性シートを有していなくても良いし、腹側胴回り部２０と背側胴回り部３０が共に伸縮性シート２４を有していても良い。 For example, the present invention is not limited to disposing the stretchable sheet 24 at the upper end portion of the ventral-side waist portion 20. The stretchable sheet 24 may be disposed at any position on the ventral side waist portion 20 in the vertical direction. In addition, the back waistline portion 30 (first waistline portion) may have a stretchable sheet, and the ventral waistline portion 20 (second waistline portion) may not have a stretch sheet, and the belly side waistline portion Both 20 and the back waistline portion 30 may have the stretchable sheet 24.
　また、上述の実施形態においては、パンツ型吸収性物品は、腹側胴回り部２０と背側胴回り部３０と吸収性本体１０とを有する所謂３ピースタイプの使い捨ておむつとして説明していたがこれに限られない。例えば、外装シート１４が腹側胴回り部２０と後側胴回り部３０とを繋いで一体化されたおむつ（所謂２ピースタイプ）であっても良い。 Moreover, in the above-mentioned embodiment, although the underpants-type absorbent article was demonstrated as what is called a three-piece type disposable diaper which has the belly side waist part 20, the back side waist part 30, and the absorptive main body 10. It is not limited. For example, the exterior sheet 14 may be a diaper (so-called two-piece type) integrated by connecting the ventral waistline portion 20 and the rear waistline portion 30.
１　おむつ（吸収性物品）、２　接合領域、
１０　吸収性本体、１１　吸収体、
１１Ａ　吸収性コア、１１Ｂ　コアラップシート、
１２　トップシート、１３　バックシート、
１４　外層シート、１５　脚回り弾性部材、
２０　腹側胴回り部（第１胴回り部）、
２１　内層シート（非伸縮性シート）、２１ａ　端（一方側）、
２２　外層シート（非伸縮性シート）、２２１　端部、
２３　糸状弾性部材、
２４　伸縮性シート、２４ａ　端（一方側）、２４ｂ　端（他方側）、
２４１　折り返し部、
２５ｓ　外装連続シート、
２６　カバーシート、２６ａ　端（一方側）、２６ｂ　端（他方側）、
３０　背側胴回り部（第２胴回り部）、３１　内層シート、
３２　外層シート、３３　糸状弾性部材、
４１　接着領域（第１接着領域）、４１ａ　端（一方側）、４１ｂ　端（他方側）、
４３　第２接着領域、４３ａ　端（一方側）、４３ｂ　端（他方側） 1 diaper (absorbent article), 2 bonding area,
10 Absorbent body, 11 Absorbent body,
11A absorbent core, 11B core wrap sheet,
12 top sheets, 13 back sheets,
14 outer layer sheet, 15 elastic members around,
20 ventral waistline (first waistline),
21 inner layer sheet (non-stretchable sheet), 21a end (one side),
22 outer layer sheet (non-stretchable sheet), 221 end,
23 thread elastic members,
24 elastic sheet, 24a end (one side), 24b end (other side),
241 turn,
25s exterior continuous sheet,
26 cover sheet, 26a end (one side), 26b end (other side),
30 back waist (second waist), 31 inner layer sheet,
32 outer layer sheet, 33 thread-like elastic member,
41 bonding area (first bonding area), 41a end (one side), 41b end (other side),
43 second bonding area, 43a end (one side), 43b end (other side)

Claims (10)

  1. 　吸収性本体、及び、第１胴回り部を有する吸収性物品の製造方法であって、
    　前記第１胴回り部を構成する非伸縮性シートを搬送方向に搬送する、搬送工程と、
    　搬送されている前記非伸縮性シートの所定の領域に接着剤を設けて接着領域を形成する、接着領域形成工程と、
    　前記搬送方向に伸長させた状態の伸縮性シートを、前記接着領域を介して前記非伸縮性シートに接合する、伸縮性シート接合工程と、
    　を有し、
    　前記伸縮性シート接合工程では、前記搬送方向と交差する交差方向において、前記接着領域の一方側の端が、前記伸縮性シートの前記一方側の端よりも前記一方側に位置するように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing an absorbent article having an absorbent main body and a first waist part, comprising:
    Transporting the non-stretchable sheet constituting the first waist portion in the transport direction;
    An adhesion area forming step of providing an adhesive in a predetermined area of the non-stretchable sheet being conveyed to form an adhesion area;
    A stretchable sheet bonding step of bonding the stretchable sheet in a state of being stretched in the transport direction to the non-stretchable sheet via the bonding area;
    Have
    In the stretchable sheet bonding step, the end on one side of the bonding area is positioned on the one side relative to the end on the one side of the stretchable sheet in a cross direction crossing the transport direction. A method of producing an absorbent article, comprising bonding an elastic sheet.
  2. 　請求項１に記載の吸収性物品の製造方法であって、
    　前記伸縮性シート接合工程の後で、
    　前記交差方向において、前記伸縮性シートの前記一方側の端よりも前記一方側にはみ出した接着領域に、所定のシート部材を接合する、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing the absorbent article according to claim 1, wherein
    After the elastic sheet bonding step,
    A method of manufacturing an absorbent article, wherein a predetermined sheet member is joined to the adhesion area which protrudes to the one side from the one side end of the stretchable sheet in the cross direction.
  3. 　請求項２に記載の吸収性物品の製造方法であって、
    　前記所定のシート部材は、前記交差方向において前記伸縮性シートの前記一方側の端よりも前記一方側の所定の位置で、前記交差方向の他方側に折り返された前記非伸縮性シートである、ことを特徴とする吸収性物品の製造方法。     A method for producing the absorbent article according to claim 2, wherein
    The predetermined sheet member is the non-elastic sheet folded back to the other side in the cross direction at a predetermined position on the one side with respect to the one end of the elastic sheet in the cross direction. A manufacturing method of an absorbent article characterized by things.
  4. 　請求項３に記載の吸収性物品の製造方法であって、
    　前記伸縮性シート接合工程の後で、
    　前記伸縮性シートのうち、前記接着領域によって接着された面とは反対側の面の所定の領域に前記接着剤を設けて第２接着領域を形成する、第２接着領域形成工程を有し、
    　折り返された前記非伸縮性シートを、前記第２接着領域を介して、前記伸縮性シートと接合する、ことを特徴とする吸収性物品の製造方法。     It is a manufacturing method of the absorptive article according to claim 3,
    After the elastic sheet bonding step,
    Forming a second bonding area by providing the adhesive on a predetermined area of the surface of the stretchable sheet opposite to the surface bonded by the bonding area to form a second bonding area;
    A method of manufacturing an absorbent article, comprising: bonding the non-stretchable sheet folded back to the stretchable sheet via the second bonding area.
  5. 　請求項４に記載の吸収性物品の製造方法であって、
    　前記第２接着領域のうち、前記接着剤が設けられている部分の平均の坪量は、
    　前記接着領域のうち、前記接着剤が設けられている部分の平均の坪量よりも大きい、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing the absorbent article according to claim 4, wherein
    The average basis weight of the portion provided with the adhesive in the second adhesive region is
    The manufacturing method of the absorbent article characterized by being larger than the average basis weight of the part in which the said adhesive agent is provided among the said adhesion | attachment area | regions.
  6. 　請求項４または５に記載の吸収性物品の製造方法であって、
    　前記交差方向において、前記第２接着領域の前記一方側の端は、前記伸縮性シートの前記一方側の端よりも、前記他方側である、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing an absorbent article according to claim 4 or 5, wherein
    In the cross direction, the one end of the second bonding area is the other end of the stretchable sheet at the other end than the one end of the stretchable sheet.
  7. 　請求項４～６のいずれか１項に記載の吸収性物品の製造方法であって、
    　前記交差方向において、折り返された前記非伸縮性シートの前記他方側の端は、前記第２接着領域の前記他方側の端よりも前記他方側である、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing an absorbent article according to any one of claims 4 to 6, wherein
    In the cross direction, the other side end of the non-stretchable sheet folded back is the other side of the other side end of the second bonding area, the production of an absorbent article Method.
  8. 　請求項１～７のいずれか１項に記載の吸収性物品の製造方法であって、
    　前記伸縮性シート接合工程では、
    　前記交差方向において、前記接着領域の他方側の端よりも、前記伸縮性シートの前記他方側の端が前記他方側になるように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing an absorbent article according to any one of claims 1 to 7, wherein
    In the elastic sheet bonding step,
    The stretchable sheet is joined such that the other end of the stretchable sheet is closer to the other side than the other end of the bonding area in the cross direction. Method of manufacturing an article.
  9. 　請求項１～７のいずれか１項に記載の吸収性物品の製造方法であって、
    　前記伸縮性シート接合工程では、
    　前記交差方向において、前記接着領域の他方側の端よりも、前記伸縮性シートの前記他方側の端が前記一方側になるように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造方法。     A method of manufacturing an absorbent article according to any one of claims 1 to 7, wherein
    In the elastic sheet bonding step,
    The stretchable sheet is joined such that the other end of the stretchable sheet is closer to the one side than the other end of the bonding area in the cross direction. Method of manufacturing an article.
  10. 　吸収性本体、及び、第１胴回り部を有する吸収性物品を製造する製造装置であって、
    　前記第１胴回り部を構成する非伸縮性シートを搬送方向に搬送する、搬送部と、
    　搬送されている前記非伸縮性シートの所定の領域に接着剤を設けて接着領域を形成する、接着領域形成部と、
    　前記搬送方向に伸長させた状態の伸縮性シートを、前記接着領域を介して前記非伸縮性シートに接合する、伸縮性シート接合部と、
    　を有し、
    　前記伸縮性シート接合部は、前記搬送方向と交差する交差方向において、前記接着領域の一方側の端が、前記伸縮性シートの前記一方側の端よりも前記一方側に位置するように、前記伸縮性シートを接合する、ことを特徴とする吸収性物品の製造装置。
          A manufacturing apparatus for manufacturing an absorbent article having an absorbent main body and a first waist part, comprising:
    A conveying unit for conveying the non-stretchable sheet constituting the first waist portion in the conveying direction;
    An adhesion area forming portion for forming an adhesion area by providing an adhesive in a predetermined area of the non-stretchable sheet being conveyed;
    A stretchable sheet bonding portion for bonding the stretchable sheet in a state of being stretched in the transport direction to the non-stretchable sheet via the bonding area;
    Have
    In the stretchable sheet bonding portion, the end on one side of the bonding area is positioned on the one side of the end on the one side of the stretchable sheet in a cross direction crossing the transport direction. An apparatus for producing an absorbent article, characterized in that an elastic sheet is joined.
PCT/JP2018/045073 2017-12-28 2018-12-07 Manufacturing method of absorbent article, and manufacturing device of absorbent particle WO2019131057A1 (en)

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