WO2019131057A1 - 吸収性物品の製造方法、及び、吸収性物品の製造装置 - Google Patents

吸収性物品の製造方法、及び、吸収性物品の製造装置 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
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PCT/JP2018/045073
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English (en)
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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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 RU2020121410A priority Critical patent/RU2774532C2/ru
Priority to CN201880084014.2A priority patent/CN111526844B/zh
Publication of WO2019131057A1 publication Critical patent/WO2019131057A1/ja

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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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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2018/045073 2017-12-28 2018-12-07 吸収性物品の製造方法、及び、吸収性物品の製造装置 WO2019131057A1 (ja)

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WO2013161957A1 (ja) * 2012-04-27 2013-10-31 ユニ・チャーム株式会社 使い捨ておむつ及び使い捨ておむつの製造方法
JP2016154654A (ja) * 2015-02-24 2016-09-01 日本製紙クレシア株式会社 パンツ型吸収性物品
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JP2008228835A (ja) * 2007-03-16 2008-10-02 Kao Corp 使い捨ておむつ
JP2011136095A (ja) * 2009-12-28 2011-07-14 Unicharm Corp 使い捨て着用物品
WO2013161957A1 (ja) * 2012-04-27 2013-10-31 ユニ・チャーム株式会社 使い捨ておむつ及び使い捨ておむつの製造方法
JP2016154654A (ja) * 2015-02-24 2016-09-01 日本製紙クレシア株式会社 パンツ型吸収性物品
WO2016158749A1 (ja) * 2015-03-27 2016-10-06 大王製紙株式会社 パンツタイプ使い捨ておむつ
WO2017056807A1 (ja) * 2015-09-30 2017-04-06 大王製紙株式会社 パンツタイプ使い捨ておむつ
WO2017149683A1 (ja) * 2016-03-01 2017-09-08 ユニ・チャーム株式会社 パンツ型吸収性物品

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CN111526844A (zh) 2020-08-11
RU2020121410A3 (zh) 2022-01-28

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