WO2016103801A1 - Method for producing absorbent article and device for producing absorbent article - Google Patents

Method for producing absorbent article and device for producing absorbent article Download PDF

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Publication number
WO2016103801A1
WO2016103801A1 PCT/JP2015/075722 JP2015075722W WO2016103801A1 WO 2016103801 A1 WO2016103801 A1 WO 2016103801A1 JP 2015075722 W JP2015075722 W JP 2015075722W WO 2016103801 A1 WO2016103801 A1 WO 2016103801A1
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WO
WIPO (PCT)
Prior art keywords
sheet
absorbent article
manufacturing
top sheet
conveying
Prior art date
Application number
PCT/JP2015/075722
Other languages
French (fr)
Japanese (ja)
Inventor
俊幸 谷尾
高橋　雄二
亜沙美 島
智之 藤田
Original Assignee
ユニ・チャーム株式会社
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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
Publication of WO2016103801A1 publication Critical patent/WO2016103801A1/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
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use

Definitions

  • the present invention relates to a method of manufacturing an absorbent article, and an apparatus for manufacturing an absorbent article.
  • Patent Document 1 discloses an absorbent article using a cooling agent composed of particles in which a cooling agent is encapsulated in microcapsules or the like.
  • the granular material (cooling agent) is adhered to the adhesive application area BA of the material (for example, a sheet member) using a roll.
  • the adhesive application area BA of the material for example, a sheet member
  • the particles may be scattered and the equipment may be soiled, or it may be difficult to arrange the necessary amount of particles in the adhesive application area BA of the material.
  • the present invention has been made in view of the above problems, and an object of the present invention is to absorb the powder which can suppress the scattering of the particles and improve the fixability of the particles to the material. It is providing the manufacturing method of a sex article, and the manufacturing device of an absorptive article.
  • the main invention for achieving the above object is a first conveying step of conveying a first sheet which is a sheet member constituting an absorbent article in a predetermined conveying direction, and an adhesive on one side of the first sheet.
  • a first adhesive application step of applying a second adhesive agent, and a dropping step of dropping a granular material to a region of the first sheet to which the adhesive is applied, the granular material being dropped in the dropping step With respect to the first sheet conveyed diagonally downward from the upstream side to the downstream side in the conveying direction in the vertically downward direction of the drop opening, the granular in the direction having at least the component in the vertically downward direction from the drop opening. It is a manufacturing method of the absorptive article characterized by making a body fall.
  • FIG. 5A is an explanatory view of a cross-sectional structure of the outer peripheral surface of the first conveyance drum.
  • FIG. 5B is an explanatory view of a metal plate.
  • FIG. 5C is an explanatory view of the mesh member.
  • FIG. 6A is an explanatory view illustrating the appearance of the cooling agent falling from the falling portion in the falling step of the sanitary napkin according to the present embodiment.
  • B is explanatory drawing explaining the mode of the cooling agent which fell from the fall part in the fall process of the manufacturing method of the sanitary napkin which concerns on a comparative example. It is explanatory drawing explaining a mode that a back sheet contacts a top sheet in a contact process. It is a table
  • surface which shows the relationship between the average SDM value of the surface roughness of a top sheet, and the fixability of the cooling agent to a top sheet.
  • a method of manufacturing an absorbent article in which the granular material is dropped in a direction having at least a vertically downward component from the dropping port with respect to the first sheet conveyed obliquely downward from the upstream side to the downstream side. It becomes clear. As a result, the rebounding of the particulate matter dropped from the drop opening with respect to the first sheet can be reduced, and scattering of the particulate matter can be suppressed.
  • the second sheet which constitutes the absorbent article together with the first sheet, on the downstream side in the conveyance direction of the first sheet with respect to the vertically downward direction of the drop opening, And a second conveying step of conveying the sheet toward the first sheet from a direction intersecting the conveying direction of one sheet, and a contacting step of bringing the second sheet into contact with the first sheet with the granular material interposed therebetween.
  • a second conveying step of conveying the sheet toward the first sheet from a direction intersecting the conveying direction of one sheet
  • a contacting step of bringing the second sheet into contact with the first sheet with the granular material interposed therebetween.
  • an adhesive agent is provided in at least a region of the side of the second sheet in contact with the first sheet, the surface of the second sheet in contact with the adhesive applied region of the first sheet. It is desirable to have a second adhesive application step of applying Thereby, the granular material can be more fixed to the first sheet and the second sheet.
  • the method further includes a folding step of folding at least a part of the first sheet in a width direction before the first adhesive application step, and the folded first sheet is It is desirable that the length in the width direction be longer than that of the second sheet. Thereby, even when a shift occurs in the width direction when the second sheet contacts the first sheet, the granular material is sandwiched between the first sheet and the second sheet while absorbing the shift. be able to.
  • the first sheet in the first conveying step, is conveyed by rotating the first conveying drum while holding the first sheet on the outer peripheral surface of the first conveying drum.
  • air it is desirable that air be allowed to pass inward from the outside of the outer peripheral surface through the plurality of vent holes formed in the outer peripheral surface.
  • the first sheet is held on the outer peripheral surface at the highest position of the outer peripheral surface of the first transport drum. This facilitates positioning of the drop port in the horizontal direction.
  • the drop port is disposed at a position lower than the highest position of the outer peripheral surface of the transfer drum. Therefore, the distance from the drop opening to the surface on the absorber side of the first sheet can be reduced, and scattering of the particles can be further suppressed.
  • the second conveyance drum is rotated by holding the second sheet constituting the absorbent article along with the first sheet on the outer peripheral surface of a second conveyance drum.
  • the second sheet intersects the conveyance direction of the first sheet at the downstream side of the conveyance direction of the first sheet than the vertically downward direction of the drop opening disposed at a position lower than the highest position of the outer peripheral surface It is desirable that the sheet is conveyed toward the first sheet from the Accordingly, it is possible to suppress scattering of the granular material from the second sheet conveyed through the second conveyance drum.
  • the particles having a particle diameter of 40 to 80 ⁇ m be dropped. Thereby, scattering of the said granular material can be suppressed.
  • the first sheet is a non-woven fabric, and an average SDM value of surface roughness of the surface on one side of the first sheet is 4 to 6 ⁇ m.
  • a first sheet conveying unit that conveys a first sheet that is a sheet member that constitutes the absorbent article, and a first adhesive application unit that applies an adhesive to the surface on one side of the first sheet are conveyed.
  • a falling portion for dropping the granular material by its own weight in a region of the first sheet on which the adhesive is applied, wherein the falling portion is directed in the direction having at least a vertically downward component from the falling opening.
  • the first sheet conveyance section conveys the first sheet obliquely downward from the upstream side to the downstream side in the conveyance direction of the first sheet in the vertically downward direction of the drop opening.
  • the sanitary napkin 1 will be described as an example of the absorbent article manufactured by the method of manufacturing an absorbent article and the manufacturing apparatus of the absorbent article according to the embodiment of the present invention.
  • the so-called sheet (for example, panty liner) etc. is included in the said absorbent article, and it is not limited to a sanitary napkin.
  • FIG. 1 is a plan view illustrating the configuration of the sanitary napkin 1.
  • FIG. 2 is a schematic cross-sectional view for explaining the configuration of the sanitary napkin 1.
  • the sanitary napkin 1 has an elongated shape, and there are “front side” and “back side” in the longitudinal direction.
  • the “front side” is a portion located on the ventral side of the user when using the sanitary napkin 1
  • the “back side” is a portion located on the dorsal side of the user.
  • the short direction of the sanitary napkin 1 be "width direction”
  • the direction orthogonal to this width direction and a longitudinal direction be "thickness direction.”
  • the side in contact with the user's skin when using the sanitary napkin 1 is referred to as “skin side”
  • the opposite side is referred to as "non-skin side” (see FIG. 2).
  • the sanitary napkin 1 comprises an absorbent body 10 for absorbing a body fluid and a liquid such as blood drainage, a top sheet 20 as a first sheet covering a surface on one side of the absorbent body 10, and an absorbent body A back sheet 30 as a second sheet sandwiching the sheet 10 with the top sheet 20 is provided.
  • the absorbent body 10 is an elongated member containing hydrophilic fibers, pulp and the like, and can efficiently absorb and hold liquids such as body fluid and blood drainage.
  • the absorber 10 is formed, for example, by laminating hydrophilic fibers or powders by an air laid method.
  • the top sheet 20 is a permeable sheet member through which fluid such as body fluid and blood drainage passes, and covers the entire surface of the absorbent body 10 from the user's skin side. That is, the top sheet 20 is formed larger than the absorber 10 in the longitudinal direction and the width direction.
  • non-woven fabric is used for the top sheet 20.
  • a second sheet 25 formed of the same members as the top sheet 20 is provided between the top sheet 20 and the absorber 10.
  • the top sheet 20 also has an ⁇ -folded area 20fr folded in the thickness direction. More specifically, the top sheet 20 is once folded inward in the width direction on both ends in the width direction of the absorbent body 10, and then folded outward in the width direction and directly extends outward in the width direction. In the ⁇ folding region 20fr, the folded top sheets 20 are joined in the thickness direction by embossing in the thickness direction. Therefore, the ⁇ -folded area 20fr is formed to be thicker than the other areas (areas of the top sheet 20 other than the ⁇ -folded area 20fr).
  • a pair of hinges 110 and a plurality of holes 120 are formed in the absorbent body 10 and the top sheet 20 on the user's skin side.
  • the pair of hinges 110 are linear portions formed extending in the longitudinal direction of the absorber 10 and the top sheet 20.
  • the pair of hinges 110 is formed by embossing the absorber 10 and the top sheet 20 in the thickness direction from the skin side of the user.
  • the plurality of holes 120 are formed in a region sandwiched by the pair of hinges 110, and penetrate the absorber 10 and the top sheet 20 in the thickness direction.
  • the back sheet 30 is a non-permeable sheet member, and for example, a film mainly made of polyethylene or the like, a sheet in which a breathable resin film is joined to a nonwoven fabric such as a spun bond, etc. are used.
  • the back sheet 30 has substantially the same shape as the top sheet 20, and covers the entire surface of the absorbent body 10 from the non-skin side of the user to the non-skin side.
  • the top sheet 20 and the back sheet 30 each have a region extending outward in the width direction of the absorber 10, and the side flaps 50 are formed by joining the regions.
  • the side flap 50 may be formed of another member different from the top sheet 20 and the back sheet 30.
  • the side flaps 50 are a pair of wing portions 51 extending outward in the width direction from a vaginal opening contact region provided on the front side of the longitudinal central portion of the absorber 10, and the vaginal opening And a pair of hip flaps 52 extending outward in the width direction from a region longitudinally rearward of the contact region.
  • the “vaginal contact region” refers to a region that contacts the user's vaginal opening when the sanitary napkin 1 is used.
  • a reinforcing sheet 55 for reinforcing the side flaps 50 is provided between the top sheet 20 and the back sheet 30.
  • the side flaps 50 are provided with a cooling sensation region CR that gives the user a refreshing sensation when the sanitary napkin 1 is used.
  • the cooling sensation region CR is a pair of belt-like regions extending in the longitudinal direction while having a predetermined distance in the width direction.
  • a cooling sensation region CR is provided by arranging a cooling agent on the surface (surface on the non-skin side) 20 a of the top sheet 20 covering the absorber 10. .
  • the cooling agent is a granular material having a multi-capsule structure in which a cooling agent such as menthol or camphor is used as a core and the periphery thereof is covered with a water-soluble substance such as starch.
  • the refreshing agent is not exposed to the outside in a normal state, but when a predetermined amount of water (for example, the user's sweat or water vapor) comes in contact with it, the water-soluble substance dissolves and the refreshing agent inside is released to the outside. Thereby, the user can be given a refreshing feeling.
  • the cooling agent is not limited to this, and may be a granular body having a structure in which the cooling agent is covered with a porous material (for example, silica gel, zeolite, etc.) capable of adsorbing molecules to a large number of pores.
  • a porous material for example, silica gel, zeolite, etc.
  • the manufacturing method of the sanitary napkin 1 includes a top sheet conveying step as a first conveying step, a heating step of heating the top sheet 200, and a folding step of folding at least a part of the top sheet 200 in the width direction.
  • the top sheet 200 conveyed in the top sheet conveyance step and the back sheet 300 conveyed in the back sheet conveyance step are belt-like before being cut into the shape of the sanitary napkin 1 as a product (see FIG. 1). Since it is a thing, the code (top sheet 200, back sheet 300) different from the code (top sheet 20, back sheet 30) used in the above-mentioned ⁇ structure of sanitary napkin 1> is attached.
  • FIG. 3 is a schematic view illustrating the configuration of the sanitary napkin manufacturing apparatus 14.
  • FIG. 4 is a plan view of the surface 200 a on the side covering the absorbent body 10 of the top sheet 200 as viewed from the vertical direction.
  • the ⁇ folding area 20 fr is not shown, and the adhesive outlet 441 of the first adhesive application unit 44, the falling port 461 of the falling unit 46, and the first adhesive application unit 44 of the top sheet 200 and falling
  • the parts hidden by the part 46 are indicated by broken lines, respectively.
  • the right direction is the conveyance direction of the top sheet 200.
  • the sanitary napkin manufacturing apparatus 14 includes a top sheet transport unit 41 as a first sheet transport unit, a back sheet transport unit 42 as a second sheet transport unit, a heating unit 43 for heating the top sheet 200, and a top sheet 200.
  • the first adhesive application part 44 which applies an adhesive to the side 200 a of the side of the top sheet 200 covering the absorber 10, and the absorber 10 of the back sheet 300
  • the second adhesive application unit 45 applies an adhesive to the surface 300 a on the covering side, and the falling unit 46 drops the cooling agent 16 toward the conveyed top sheet 200.
  • the surfaces 200 a and 300 a on the side covering the absorber 10 will be simply referred to as “the surfaces 200 a and 300 a on the absorber 10 side”.
  • the top sheet conveyance unit 41 has a cylindrical first conveyance drum 411, and rotates the first conveyance drum 411 while holding the top sheet 200 on a part of the outer peripheral surface 411a of the first conveyance drum 411.
  • the top sheet 200 is conveyed.
  • the top sheet 200 is held by the outer peripheral surface 411 a at the highest position H 1 of the outer peripheral surface 411 a of the first conveyance drum 411, and the first conveyance drum 411 is centered on the rotation axis. Is rotating clockwise.
  • the specific configuration of the first conveyance drum 411 will be described later.
  • top sheet conveyance unit 41 top sheet obliquely downward from the upstream side to the downstream side in the conveyance direction of the top sheet 200 in the vertically downward direction (the arrow Y direction in FIG. 3) of the falling port 461 of the falling portion 46 Transport 200.
  • the back sheet conveyance unit 42 has a cylindrical second conveyance drum 421, and rotates the second conveyance drum 421 while holding the back sheet 300 on a part of the outer circumferential surface 421 a of the second drum 421.
  • the sheet 300 is conveyed.
  • the back sheet conveyance unit 42 directs the back sheet 300 toward the conveyed top sheet 200. It is being transported.
  • the second transport drum 421 rotates counterclockwise around the rotation axis.
  • the back sheet conveyance unit 42 moves from the direction intersecting the conveyance direction of the top sheet 200 toward the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the downward vertical direction of the drop opening 461.
  • the back sheet 300 is conveyed to bring the back sheet 300 into contact with the top sheet 200.
  • the absorbent body 10, the second sheet 25, the reinforcing sheet 55, and the cooling agent 16 dropped from the falling portion 46 are sandwiched.
  • the heating unit 43 heats the top sheet 200 made of non-woven fabric. Inside the heating unit 43, heated air is blown toward the top sheet 200 from the surface 200b on the skin side of the user toward the surface 200a on the absorber 10 side. That is, in FIG. 3, heated air is blown from the lower side in the thickness direction of the conveyed top sheet 200. The heated air blown to the top sheet 200 flows so as to penetrate in the thickness direction of the top sheet 200 and heats the interior of the top sheet 200. At this time, the gap (void) between the entangled fibers of the top sheet 200 becomes a flow path of the heating air.
  • the heating unit 43 is disposed upstream of the first adhesive application unit 44 in the transport direction of the top sheet 200. That is, the top sheet 200 is heated by the heating unit 43 before the adhesive is applied by the first adhesive application unit 44, whereby the voids between the fibers are expanded.
  • the folded portion 47 is the ⁇ -folded area 20fr described above inside the pair of adhesive application areas BA formed by the first adhesive application section 44 described later in the width direction of the top sheet 200 (see FIGS. 1 and 2). Form In the top sheet 200 folded by the folding portion 47, the length in the width direction is longer than the length in the width direction of the back sheet 300.
  • the first adhesive application unit 44 applies an adhesive such as a hot melt adhesive, for example, by contact coating to the surface 200 a on the absorber 10 side of the top sheet 200. More specifically, as shown in FIG. 4, the first adhesive application unit 44 has a pair of adhesive outlets 441 arranged at predetermined intervals in the width direction of the top sheet 200, and An adhesive is applied in a strip shape so as to extend in the conveyance direction of the top sheet 200 on the surface 200 a on the absorber 10 side. Thus, the adhesive application area BA is formed on the surface 200 a of the top sheet 200 on the absorber 10 side.
  • an adhesive such as a hot melt adhesive
  • the adhesive application area BA is an area to be the cooling sensation area CR (see FIG. 1).
  • a portion to which the adhesive is not applied is indicated by a two-dot chain line, and a portion to which the adhesive is applied is indicated by hatching.
  • the second adhesive application unit 45 is a region (adhesive application) of at least the adhesive applied to the top sheet 200 in the surface 300 a on the absorber 10 side of the back sheet 300 (the surface on the side in contact with the top sheet 200).
  • An adhesive is applied to the area in contact with the area BA), that is, the area to be the cold area CR.
  • adhesive agents such as a hot melt adhesive agent, are used similarly to the 1st adhesive agent application part 44, for example.
  • the drop unit 46 drops the granular cooling agent 16 by its own weight onto the adhesive application area BA of the top sheet 200 being conveyed. More specifically, the drop unit 46 drops the cooling agent 16 from the pair of drop openings 461 in the direction having at least the component in the vertically downward direction. In other words, the cooling agent 16 falls from the drop port 461 in the direction having at least the component in the vertically downward direction.
  • falling in the direction having at least the component in the vertically downward direction means that the falling portion 46 causes the cooling agent 16 to fall from its falling port 461 by its own weight, but the conveying speed of the top sheet 200 by the top sheet conveying portion 41 is Since it is fast, an air flow along the transport direction is generated in the vertically downward direction of the drop port 461, and it is considered that the cooling agent 16 may be blown off by the air flow without falling straight in the vertically downward direction.
  • the cooling agent 16 that has reached the adhesive application area BA is bonded to the top sheet 200 by the adhesive to form a cooling sensation area CR.
  • the particle size of the cooling agent 16 falling from the falling portion 46 is 40 to 80 ⁇ m.
  • the pair of drop openings 461 of the drop unit 46 is lower than the highest position H1 of the outer circumferential surface 411a of the first conveyance drum 411 and the highest position H2 of the outer circumferential surface 421a of the second conveyance drum 421 (vertical downward direction) Is located in That is, the drop port 461 is disposed in an area connecting three points of the position H 1, the position H 2, and the contact position of the top sheet 200 and the back sheet 300.
  • FIG. 4 shows the pair of falling portions 46 provided at predetermined intervals in the width direction of the top sheet 200, the present invention is not limited to this and, like the first adhesive application portion 44, they are integrated.
  • the falling portion 46 may be provided with a pair of falling ports 461.
  • dispersed to adhesive application area BA is shown by the hatching of a sand texture.
  • FIG. 5A is an explanatory view of a cross-sectional structure of the outer peripheral surface 411 a of the first conveyance drum 411.
  • FIG. 5B is an explanatory view of the metal plate 412.
  • FIG. 5C is an explanatory view of the mesh member 413.
  • the outer peripheral surface 411 a of the first conveyance drum 411 is configured by overlapping the metal plate 412 and the mesh member 413. More specifically, the metal plate 412 is disposed on the side of the top sheet 200 to be conveyed, and the mesh member 413 is disposed inside the metal plate 412.
  • the metal plate 412 is formed with a plurality of punched holes 412a which become air holes through which air passes.
  • the punched holes 412a have a round shape and are arranged in a zigzag array.
  • the reticulated member 413 is a reticulated member in which the wire 413a is plain-woven to form a mesh 413b, and the mesh 413b becomes an air hole. That is, the vent holes are formed by the punched holes 412 a of the metal plate 412 and the meshes 413 b of the mesh member 413.
  • the mesh member 413 is formed of, for example, a wire mesh obtained by plain-weaving a metal wire or a plastic mesh obtained by plain-weaving a plastic wire.
  • the mesh 413 b of the mesh member 413 is set to be smaller than the diameter of the punched hole 412 a of the metal plate 412.
  • the first transport drum 411 air passes inward from the outside of the outer peripheral surface 411a through the vent holes.
  • the structure of the first transport drum 411 is not limited to this.
  • FIG. 6A is an explanatory view for explaining the appearance of the cooling agent 16 dropped from the dropping part 46 in the sanitary napkin manufacturing apparatus according to the comparative example.
  • FIG. 6B is an explanatory view for explaining the appearance of the cooling agent 16 which has fallen from the falling portion 46 in the sanitary napkin manufacturing device 14 according to the present embodiment. 6A and 6B, the cooling agent 16 dropped from the drop unit 46 will be described as being dropped directly below the drop opening 461 in the vertical direction.
  • the cooling agent 16 is dropped by its own weight from the drop opening 461 of the drop unit 46 and lands on the adhesive application area BA (see FIG. 4) of the top sheet 200 and is adhered thereto. Some of the dropped cooling agent 16 does not adhere to the adhesive application area BA of the top sheet 200 and may bounce back.
  • the top sheet 200 is orthogonal to the vertical direction from the upstream side to the downstream side in the transport direction in the vertically downward direction (arrow Y direction) of the drop port 461 In the direction (arrow X direction).
  • the cooling agent 16 dropped from the drop port 461 vertically collides with the top sheet 200 being conveyed and bounces back.
  • the top sheet 200 is conveyed obliquely downward from the upstream side to the downstream side in the conveyance direction in the vertically downward direction of the drop port 461 It is done.
  • the cooling agent 16 dropped from the drop port 461 obliquely collides with the top sheet 200 to be conveyed.
  • the cooling agent 16 that has collided with the top sheet 200 is affected by the conveyance in the downward direction of the top sheet 200, the force in the vertically downward direction becomes smaller than in the comparative example, and the rebounding becomes smaller. Therefore, the scattering of the cooling agent 16 is suppressed more than in the case of the comparative example.
  • the cooling agent 16 since the cooling agent 16 has a multi-capsule structure, it is weak to an impact and easily broken.
  • the drop section 46 drops the cooling agent 16 onto the top sheet 200 without giving an impact to the cooling agent 16, unlike the case where the cooling agent 16 is dropped by spraying, for example, because the cooling agent 16 is dropped by its own weight. It can be done.
  • FIG. 7 is an explanatory view for explaining a state in which the back sheet 300 contacts the top sheet 200 on the downstream side in the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461.
  • the top sheet conveyance unit 41 is driven at high speed, and the cooling agent 16 dropped from the drop port 461 is affected by the air flow before reaching the top sheet 200. As a result, there is a possibility of being blown downstream in the transport direction.
  • the back sheet 300 Since the back sheet 300 is conveyed toward the top sheet 200 from the direction intersecting the conveyance direction of the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461, the air is blown away
  • the cooling agent 16 falls into the area between the top sheet 200 and the back sheet 300. Therefore, the back sheet 300 contacts the top sheet 200 by sandwiching not only the cooling agent 16 adhered to the adhesive application area BA of the top sheet 200 but also the cooling agent 16 blown off by the air flow.
  • the distance D from the center of the drop port 461 to the contact position between the top sheet 200 and the back sheet 300 is about 10 cm, and the distance D is preferably about 15 cm at maximum.
  • the distance D indicates a predetermined distance in the horizontal direction, that is, in the direction perpendicular to the paper surface and in the direction (arrow X direction) orthogonal to the vertical direction (vertically downward direction).
  • FIG. 8 is a table showing the relationship between the average SDM value of the surface roughness of the top sheet 200 and the fixability of the cooling agent 16 to the top sheet 200. More specifically, with respect to the average SDM value of the roughness in the transport direction of the surface 200 a on the absorber 10 side of the top sheet 200 and the roughness in the width direction, the cooling agent 16 dropped from the falling portion 46 is the top sheet 200 It shows about how fixed (adhered) on the surface 200 a on the side of the absorbent body 10 of FIG.
  • SDM value of surface roughness means texture measurement technology (also referred to as texture measurement system, KES system, etc.) using a texture measurement machine (eg KES-FB4 AUTO-A, manufactured by Kato Tech Co., Ltd.)
  • the surface property value (SDM value) is one of mechanical property values obtained when the texture of the top sheet 200 is measured using.
  • a value obtained by averaging “average of SDM values in the transport direction of the top sheet 200” and “average of SDM values in the width direction of the top sheet 200” is taken as “average SDM value of surface roughness”. .
  • the average SDM value is smaller than 4 ⁇ m, the eyes of the surface 200 a on the absorber 10 side of the top sheet 200 are fine and dense, and thus the dropped cooling agent 16 collides with the top sheet 200 and bounces back. It is considered difficult to establish.
  • the average SDM value is larger than 6 ⁇ m, the cooling agent 16 that has fallen falls through the top sheet 200 because the surface 200 a of the top sheet 200 on the absorber 10 side is rough and there are many gaps. It is thought that it is difficult to establish it.
  • the average SDM value is in the range of 4 to 6 ⁇ m, the cooling agent 16 has a good fixing property to the surface 200 a on the absorber 10 side of the top sheet 200 and is hardly scattered.
  • the top sheet 200 is transported at least vertically from the dropping port 461 with respect to the top sheet 200 transported obliquely downward from the upstream side to the downstream side in the transport direction of the top sheet 200 in the vertically downward direction of the dropping port 461 Since the granular cooling agent 16 is dropped by its own weight in the direction having the downward component, the cooling agent 16 falling from the dropping port 461 is less likely to bounce back to the top sheet 200, and the scattering of the cooling agent 16 is suppressed. be able to.
  • the back sheet transport unit 42 On the downstream side of the transport direction of the top sheet 200 from the vertically downward direction of the drop opening 461, in the back sheet transport process, the back sheet transport unit 42 tops the back sheet 300 from the direction intersecting the transport direction of the top sheet 200 The sheet is conveyed toward the sheet 200, and in the contact step, the cold sheet 16 is brought into contact with the top sheet 200 with the cooling agent 16 interposed therebetween.
  • the photosensitive agent 16 can be dropped to the region between the top sheet 200 and the back sheet 300, and scattering of the cooling agent 16 can be further suppressed.
  • the second adhesive application unit 45 applies the adhesive to at least the adhesive application area BA of the top sheet 200 on the side 300 a of the back sheet 300 in contact with the top sheet 200, the top sheet 200.
  • the cooling agent 16 dropped to the adhesive application area BA with the adhesive applied to the back sheet 300 side, the top is compared with the case where the adhesive is not applied to the back sheet 300 side.
  • the cooling agent 16 can be further fixed to the sheet 200 and the back sheet 300.
  • the top sheet conveyance unit 41 conveys the top sheet 200 by rotating the first conveyance drum 411 while holding the top sheet 200 on the outer circumferential surface 411 a of the first conveyance drum 411, the top sheet 200 is stabilized. Can be transported. Further, since the top sheet conveyance unit 41 allows air to pass from the outside to the inside of the outer peripheral surface 411 a through the plurality of vent holes formed in the outer peripheral surface 411 a, the holding of the top sheet 200 on the outer peripheral surface 411 a In addition to being reliable, scattering can be suppressed by sucking the cooling agent 16 dropped from the drop port 461 with air.
  • the top sheet conveyance unit 41 since the top sheet 200 is held by the outer peripheral surface 411a at the highest position H1 of the outer peripheral surface 411a of the first conveyance drum 411, the top sheet 200 and the back sheet 300 are from the position H1.
  • the drop portion 46 can be disposed in the horizontal area up to the position where the contact portion contacts, and the drop portion 46 can be easily positioned.
  • the drop port 461 of the drop unit 46 is disposed at a position lower than the highest position H1 of the outer peripheral surface 411a of the first conveyance drum 411 and the highest position H2 of the outer peripheral surface 421a of the second conveyance drum 421 Therefore, the distance from the drop opening 461 to the surface 200 a on the absorber 10 side of the top sheet 200 can be reduced, and scattering of the cooling agent 16 from the back sheet 300 and scattering can be suppressed.
  • the top sheet 200 is a non-woven fabric, and since the average SDM value of the surface roughness of the surface 200 a on the absorber 10 side is 4 to 6 ⁇ m, the top sheet 200 of the dropped cooling agent 16 on the absorber 10 side The fixability to the surface 200a is better.
  • the first sheet is described as the top sheet 200
  • the second sheet is described as the back sheet 300.
  • the first sheet may be the back sheet 300
  • the second sheet may be the top sheet 200. Good.
  • cooling agent 16 which contained a cooling agent as a granular object was explained, it may be not only this but a fragrance etc., for example.
  • the top sheet transport unit 41 transports the top sheet 200 using the first transport drum 411
  • the back sheet transport unit 42 transports the back sheet 300 using the second transport drum 421.
  • the top sheet 200 and the back sheet 300 may be transported using a plurality of rollers.
  • the back sheet 300 is conveyed toward the top sheet 200 from the direction intersecting the conveyance direction of the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461.
  • the dropped cooling agent 16 is caught in the region between the top sheet 200 and the back sheet 300
  • the present invention is not limited to this.
  • the dropped cooling agent 16 is on the adhesive application region BA of the top sheet 200.
  • the back sheet 300 may be in contact with the top sheet 200 after the top sheet 200 is conveyed for a while in a state where it is adhered and fixed to the sheet.
  • the adhesive is applied to the adhesive application area BA of the top sheet 200 in the back sheet 300 on the side 300 a in contact with the top sheet 200, but when the present invention is carried out
  • the adhesive need not necessarily be applied to the back sheet 300 side.
  • sanitary napkin (absorbent article) 14 ... sanitary napkin manufacturing device 16 ... cooling agent (particulate body) 20, 200 ... top sheet (first sheet) 30, 300 ... back sheet (second sheet) 41: Top sheet conveyance unit (first sheet conveyance unit) DESCRIPTION OF SYMBOLS 42 ... Back sheet conveyance part 43 ... Heating part 44 ... 1st adhesive application part 45 ... 2nd adhesive application part 46 ... Falling part 47 ... Folding part 411 ... 1st conveyance drum 421 ... 2nd conveyance drum 461 ... Drop opening

Abstract

This method for producing a sanitary napkin (1) comprises a top sheet conveyance step in which a top sheet (200) is conveyed, a first adhesive application step in which an adhesive is applied to the surface on one side of the top sheet (200), and a dropping step in which a cooling sensation agent (16) is made to drop by the weight thereof onto an adhesive-coated area (BA) of the top sheet (200). In the dropping step, the cooling sensation agent (16) is made to drop from a dropping port (461) in a direction having at least a vertically downward component, toward the top sheet (200), which is conveyed obliquely downward from the upstream side to the downstream side in the conveyance direction of said top sheet (200), in the vertically downward direction of the dropping port (461).

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.
　従来、生理用ナプキン等の吸収性物品において、使用時の蒸れやべたつきによる不快感を低減させるために、使用者に清涼感を与える物質（例えば冷感剤）を備えたものが知られている。例えば、特許文献１には、マイクロカプセル等に清涼剤を内包した粒状からなる冷感剤を用いた吸収性物品が開示されている。 Heretofore, there has been known an absorbent article such as a sanitary napkin provided with a substance (for example, a cooling agent) which gives the user a refreshing sensation in order to reduce discomfort due to stuffiness and stickiness at the time of use. . For example, Patent Document 1 discloses an absorbent article using a cooling agent composed of particles in which a cooling agent is encapsulated in microcapsules or the like.
特許第５４６５９１０号Patent No. 465 5910
　特許文献１に記載された吸収性物品では、資材（例えばシート部材）の接着剤塗布領域ＢＡにロールを用いて粒状体（冷感剤）を接着させている。この他に、粒状体を資材に接着させる方法の例としては、スプレー等を用いて資材の接着剤塗布領域ＢＡに粒状体を吹きつける方法がある。しかしながら、これらの方法では、粒状体が飛び散ってしまい、設備が汚れるといった問題や、必要な分量の粒状体を資材の接着剤塗布領域ＢＡに配置することが困難となるといった問題が懸念される。 In the absorbent article described in Patent Document 1, the granular material (cooling agent) is adhered to the adhesive application area BA of the material (for example, a sheet member) using a roll. In addition to this, as an example of a method of adhering the granular material to the material, there is a method of spraying the granular material onto the adhesive application area BA of the material using a spray or the like. However, in these methods, there is a concern that the particles may be scattered and the equipment may be soiled, or it may be difficult to arrange the necessary amount of particles in the adhesive application area BA of the material.
　本発明は、上記のような問題に鑑みてなされたものであって、その目的とするところは、粒状体の飛散を抑制して資材への粒状体の定着性を向上させることが可能な吸収性物品の製造方法、及び吸収性物品の製造装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to absorb the powder which can suppress the scattering of the particles and improve the fixability of the particles to the material. It is providing the manufacturing method of a sex article, and the manufacturing device of an absorptive article.
　上記目的を達成するための主たる発明は、吸収性物品を構成するシート部材である第１シートを所定の搬送方向に搬送する第１搬送工程と、前記第１シートの一側の面に接着剤を塗布する第１接着剤塗布工程と、前記第１シートの前記接着剤が塗布された領域に粒状体を自重により落下させる落下工程とを有し、前記落下工程では、前記粒状体を落下させる落下口の鉛直下方向において前記搬送方向の上流側から下流側に向かって斜め下方向に搬送される前記第１シートに対して、前記落下口から少なくとも鉛直下方向の成分を有する方向に前記粒状体を落下させる、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 first conveying step of conveying a first sheet which is a sheet member constituting an absorbent article in a predetermined conveying direction, and an adhesive on one side of the first sheet. A first adhesive application step of applying a second adhesive agent, and a dropping step of dropping a granular material to a region of the first sheet to which the adhesive is applied, the granular material being dropped in the dropping step With respect to the first sheet conveyed diagonally downward from the upstream side to the downstream side in the conveying direction in the vertically downward direction of the drop opening, the granular in the direction having at least the component in the vertically downward direction from the drop opening It is a manufacturing method of the absorptive article characterized by making a body fall. 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、吸収性物品を製造する際に、粒状体の飛散を抑制して第１シート（資材）への粒状体の定着性を向上させることができる。 ADVANTAGE OF THE INVENTION According to this invention, when manufacturing an absorbent article, scattering of a granular material can be suppressed and the fixability of the granular material to a 1st sheet (material) can be improved.
生理用ナプキンの構成を説明する平面図である。It is a top view explaining the composition of a sanitary napkin. 生理用ナプキンの構成を説明する概略断面図である。It is a schematic sectional drawing explaining the structure of a sanitary napkin. 生理用ナプキン製造装置の構成を説明する概略図である。It is a schematic diagram explaining composition of a sanitary napkin manufacturing device. トップシートの吸収体を覆う側の面を垂直方向から見た平面図である。It is the top view which looked at the field on the side which covers an absorber of a top sheet from the perpendicular direction. 図５Ａは、第１搬送ドラムの外周面の断面構造の説明図である。図５Ｂは、金属板の説明図である。図５Ｃは、網状部材の説明図である。FIG. 5A is an explanatory view of a cross-sectional structure of the outer peripheral surface of the first conveyance drum. FIG. 5B is an explanatory view of a metal plate. FIG. 5C is an explanatory view of the mesh member. 図６Ａは、本実施形態に係る生理用ナプキンの製造方法の落下工程において落下部から落下した冷感剤の様子を説明する説明図である。図６Ｂは、比較例に係る生理用ナプキンの製造方法の落下工程において落下部から落下した冷感剤の様子を説明する説明図である。FIG. 6A is an explanatory view illustrating the appearance of the cooling agent falling from the falling portion in the falling step of the sanitary napkin according to the present embodiment. FIG. 6: B is explanatory drawing explaining the mode of the cooling agent which fell from the fall part in the fall process of the manufacturing method of the sanitary napkin which concerns on a comparative example. 接触工程においてバックシートがトップシートに接触する様子を説明する説明図である。It is explanatory drawing explaining a mode that a back sheet contacts a top sheet in a contact process. トップシートの表面粗さの平均ＳＤＭ値とトップシートへの冷感剤の定着性との関係を示す表である。It is a table | surface which shows the relationship between the average SDM value of the surface roughness of a top sheet, and the fixability of the cooling agent to a top sheet.
　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。 At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
　吸収性物品を構成するシート部材である第１シートを所定の搬送方向に搬送する第１搬送工程と、前記第１シートの一側の面に接着剤を塗布する第１接着剤塗布工程と、前記第１シートの前記接着剤が塗布された領域に粒状体を自重により落下させる落下工程とを有し、前記落下工程では、前記粒状体を落下させる落下口の鉛直下方向において前記搬送方向の上流側から下流側に向かって斜め下方向に搬送される前記第１シートに対して、前記落下口から少なくとも鉛直下方向の成分を有する方向に前記粒状体を落下させる吸収性物品の製造方法が明らかとなる。これにより、前記落下口から落下した前記粒状体の前記第１シートに対する跳ね返りが小さくなり、前記粒状体の飛散を抑制することができる。 A first conveying step of conveying a first sheet, which is a sheet member constituting the absorbent article, in a predetermined conveying direction, and a first adhesive application step of applying an adhesive to a surface on one side of the first sheet; And dropping the granular material in the region of the first sheet to which the adhesive is applied, and in the dropping step, in the conveying direction in the vertically downward direction of the dropping opening for dropping the granular material in the dropping process. There is provided a method of manufacturing an absorbent article in which the granular material is dropped in a direction having at least a vertically downward component from the dropping port with respect to the first sheet conveyed obliquely downward from the upstream side to the downstream side. It becomes clear. As a result, the rebounding of the particulate matter dropped from the drop opening with respect to the first sheet can be reduced, and scattering of the particulate matter can be suppressed.
　かかる吸収性物品の製造方法であって、前記落下口の鉛直下方向よりも前記第１シートの搬送方向の下流側において、前記第１シート共に前記吸収性物品を構成する第２シートを前記第１シートの搬送方向と交差する方向から前記第１シートに向かって搬送する第２搬送工程と、前記粒状体を間に挟んで前記第２シートを前記第１シートと接触させる接触工程とを有する、ことが望ましい。これにより、例えば気流によって飛ばされた前記粒状体を前記第１シートと前記第２シートとの間の領域に落下させることができ、前記粒状体の飛散をより抑制することができる。 In the method of manufacturing such an absorbent article, the second sheet, which constitutes the absorbent article together with the first sheet, on the downstream side in the conveyance direction of the first sheet with respect to the vertically downward direction of the drop opening, And a second conveying step of conveying the sheet toward the first sheet from a direction intersecting the conveying direction of one sheet, and a contacting step of bringing the second sheet into contact with the first sheet with the granular material interposed therebetween. Is desirable. As a result, for example, the granular material blown off by the air flow can be dropped into the region between the first sheet and the second sheet, and scattering of the granular material can be further suppressed.
　かかる吸収性物品の製造方法であって、前記第２シートの前記第１シートと接触する側の面のうち、少なくとも前記第１シートの前記接着剤が塗布された領域と接触する領域に接着剤を塗布する第２接着剤塗布工程を有する、ことが望ましい。これにより、前記第１シート及び前記第２シートに対して前記粒状体をより定着させることができる。 In the method of manufacturing such an absorbent article, an adhesive agent is provided in at least a region of the side of the second sheet in contact with the first sheet, the surface of the second sheet in contact with the adhesive applied region of the first sheet. It is desirable to have a second adhesive application step of applying Thereby, the granular material can be more fixed to the first sheet and the second sheet.
　かかる吸収性物品の製造方法であって、前記第１接着剤塗布工程の前に前記第１シートの少なくとも一部を幅方向に折り畳む折り畳み工程を有し、折り畳まれた前記第１シートは、前記幅方向の長さが前記第２シートよりも長い、ことが望ましい。これにより、前記第２シートが前記第１シートに接触する際に幅方向にずれが生じた場合でも、当該ずれを吸収しながら粒状体を前記第１シートと前記第２シートとの間に挟み込むことができる。 In the method of manufacturing such an absorbent article, the method further includes a folding step of folding at least a part of the first sheet in a width direction before the first adhesive application step, and the folded first sheet is It is desirable that the length in the width direction be longer than that of the second sheet. Thereby, even when a shift occurs in the width direction when the second sheet contacts the first sheet, the granular material is sandwiched between the first sheet and the second sheet while absorbing the shift. be able to.
　かかる吸収性物品の製造方法であって、前記第１搬送工程では、第１搬送ドラムの外周面に前記第１シートを保持させながら前記第１搬送ドラムを回転させることによって前記第１シートを搬送すると共に、前記外周面に形成された複数の通気穴を介して前記外周面の外側から内側に向かってエアを通過させる、ことが望ましい。これにより、前記第１シートを安定して搬送することができると共に、前記外周面における前記第１シートの保持がより確実となることに加え、前記落下口から落下した前記粒状体をエアで吸引することで飛散を抑制することができる。 In the method of manufacturing such an absorbent article, in the first conveying step, the first sheet is conveyed by rotating the first conveying drum while holding the first sheet on the outer peripheral surface of the first conveying drum. In addition, it is desirable that air be allowed to pass inward from the outside of the outer peripheral surface through the plurality of vent holes formed in the outer peripheral surface. Thereby, the first sheet can be stably transported, and in addition to the holding of the first sheet on the outer peripheral surface being more reliable, the granular material dropped from the drop opening is suctioned by air. Scattering can be suppressed by doing this.
　かかる吸収性物品の製造方法であって、前記第１搬送ドラムの前記外周面の最も高い位置において前記第１シートが前記外周面に保持されている、ことが望ましい。これにより、水平方向における前記落下口の位置決めがしやすくなる。 In the method of manufacturing such an absorbent article, it is preferable that the first sheet is held on the outer peripheral surface at the highest position of the outer peripheral surface of the first transport drum. This facilitates positioning of the drop port in the horizontal direction.
　かかる吸収性物品の製造方法であって、前記落下口は、前記搬送ドラムの前記外周面の最も高い位置よりも低い位置に配置されている、ことが望ましい。これにより、前記落下口から前記第１シートの前記吸収体側の面までの距離を近づけることができ、前記粒状体の飛散をより抑制することができる。 In the method of manufacturing such an absorbent article, it is preferable that the drop port is disposed at a position lower than the highest position of the outer peripheral surface of the transfer drum. Thereby, the distance from the drop opening to the surface on the absorber side of the first sheet can be reduced, and scattering of the particles can be further suppressed.
　かかる吸収性物品の製造方法であって、前記第１シートと共に前記吸収性物品を構成する第２シートを第２搬送ドラムの外周面に保持させながら前記第２搬送ドラムを回転させることによって前記第２シートを搬送する第２搬送工程と、前記粒状体を間に挟んで前記第２シートを前記第１シートと接触させる接触工程とを有し、前記第２搬送工程では、前記第２搬送ドラムの前記外周面の最も高い位置よりも低い位置に配置された前記落下口の鉛直下方向よりも前記第１シートの搬送方向の下流側において前記第２シートを前記第１シートの搬送方向と交差する方向から前記第１シートに向かって搬送する、ことが望ましい。これにより、前記第２搬送ドラムを介して搬送される前記第２シートからはみ出して前記粒状体が飛散することを抑制することができる。 In the method of manufacturing such an absorbent article, the second conveyance drum is rotated by holding the second sheet constituting the absorbent article along with the first sheet on the outer peripheral surface of a second conveyance drum. A second conveying step of conveying the two sheets, and a contacting step of bringing the second sheet into contact with the first sheet with the granular material interposed therebetween; in the second conveying step, the second conveying drum The second sheet intersects the conveyance direction of the first sheet at the downstream side of the conveyance direction of the first sheet than the vertically downward direction of the drop opening disposed at a position lower than the highest position of the outer peripheral surface It is desirable that the sheet is conveyed toward the first sheet from the Accordingly, it is possible to suppress scattering of the granular material from the second sheet conveyed through the second conveyance drum.
　かかる吸収性物品の製造方法であって、前記落下工程では、粒径が４０～８０μｍである前記粒状体を落下させる、ことが望ましい。これにより、前記粒状体の飛散を抑制することができる。 In the method of manufacturing such an absorbent article, it is desirable that in the dropping step, the particles having a particle diameter of 40 to 80 μm be dropped. Thereby, scattering of the said granular material can be suppressed.
　かかる吸収性物品の製造方法であって、前記第１シートは不織布であり、前記第１シートの前記一側の面の表面粗さの平均ＳＤＭ値が４～６μｍである、ことが望ましい。これにより、落下した前記粒状体の前記第１シートの前記吸収体側の面への定着性がより良好になる。 In the method of manufacturing such an absorbent article, it is preferable that the first sheet is a non-woven fabric, and an average SDM value of surface roughness of the surface on one side of the first sheet is 4 to 6 μm. Thereby, the fixability to the surface by the side of the said absorber of the said 1st sheet of the said granular material which fell becomes better.
　かかる吸収性物品の製造方法であって、前記第１接着剤塗布工程の前に前記第１シートを加熱する加熱工程を有する、ことが望ましい。これにより、落下した前記粒状体の前記第１シートの前記吸収体側の面への定着性がより良好になる。 In the method of manufacturing such an absorbent article, it is desirable to have a heating step of heating the first sheet before the first adhesive application step. Thereby, the fixability to the surface by the side of the said absorber of the said 1st sheet of the said granular material which fell becomes better.
　かかる吸収性物品の製造方法であって、 A method of manufacturing such an absorbent article,
　また、吸収性物品を構成するシート部材である第１シートを搬送する第１シート搬送部と、前記第１シートの一側の面に接着剤を塗布する第１接着剤塗布部と、搬送される前記第１シートの前記接着剤が塗布された領域に粒状体を自重により落下させる落下部とを備え、前記落下部は、落下口から、少なくとも鉛直下方向の成分を有する方向へ前記粒状体を落下させ、前記第１シート搬送部は、前記落下口の鉛直下方向において前記第１シートの搬送方向の上流側から下流側に向かって斜め下方向に前記第１シートを搬送する吸収性物品の製造装置が明らかとなる。これにより、前記落下口から落下した前記粒状体の前記第１シートに対する跳ね返りが小さくなり、前記粒状体の飛散を抑制することができる。 In addition, a first sheet conveying unit that conveys a first sheet that is a sheet member that constitutes the absorbent article, and a first adhesive application unit that applies an adhesive to the surface on one side of the first sheet are conveyed. And a falling portion for dropping the granular material by its own weight in a region of the first sheet on which the adhesive is applied, wherein the falling portion is directed in the direction having at least a vertically downward component from the falling opening. And the first sheet conveyance section conveys the first sheet obliquely downward from the upstream side to the downstream side in the conveyance direction of the first sheet in the vertically downward direction of the drop opening. The manufacturing equipment of As a result, the rebounding of the particulate matter dropped from the drop opening with respect to the first sheet can be reduced, and scattering of the particulate matter can be suppressed.
＝＝＝実施形態＝＝＝
　本発明の実施形態に係る吸収性物品の製造方法、及び吸収性物品の製造装置により製造される吸収性物品の一例として、生理用ナプキン１について説明する。なお、当該吸収性物品には、所謂おりものシート（例えばパンティライナー）等も含まれており、生理用ナプキンに限定されるものではない。 === Embodiments ===
The sanitary napkin 1 will be described as an example of the absorbent article manufactured by the method of manufacturing an absorbent article and the manufacturing apparatus of the absorbent article according to the embodiment of the present invention. In addition, the so-called sheet (for example, panty liner) etc. is included in the said absorbent article, and it is not limited to a sanitary napkin.
＜生理用ナプキン１の構成＞
　図１は、生理用ナプキン１の構成を説明する平面図である。図２は、生理用ナプキン１の構成を説明する概略断面図である。 <Configuration of sanitary napkin 1>
FIG. 1 is a plan view illustrating the configuration of the sanitary napkin 1. FIG. 2 is a schematic cross-sectional view for explaining the configuration of the sanitary napkin 1.
　生理用ナプキン１は、図１に示すように、細長い形状を有し、その長手方向には「前側」及び「後側」がある。「前側」とは、生理用ナプキン１を使用する際に使用者の腹側に位置する部分であり、「後側」とは、使用者の背側に位置する部分である。また、生理用ナプキン１の短手方向を「幅方向」とし、この幅方向及び長手方向と直交する方向を「厚さ方向」とする。この厚さ方向において、生理用ナプキン１の使用時に使用者の肌と当接する側を「肌側」、その逆側を「非肌側」とする（図２参照）。 As shown in FIG. 1, the sanitary napkin 1 has an elongated shape, and there are “front side” and “back side” in the longitudinal direction. The “front side” is a portion located on the ventral side of the user when using the sanitary napkin 1, and the “back side” is a portion located on the dorsal side of the user. Moreover, let the short direction of the sanitary napkin 1 be "width direction", and let the direction orthogonal to this width direction and a longitudinal direction be "thickness direction." In this thickness direction, the side in contact with the user's skin when using the sanitary napkin 1 is referred to as "skin side", and the opposite side is referred to as "non-skin side" (see FIG. 2).
　図２に示すように、生理用ナプキン１は、体液や排血等の液体を吸収する吸収体１０と、吸収体１０の一側の面を覆う第１シートとしてのトップシート２０と、吸収体１０をトップシート２０との間に挟む第２シートとしてのバックシート３０とを備える。 As shown in FIG. 2, the sanitary napkin 1 comprises an absorbent body 10 for absorbing a body fluid and a liquid such as blood drainage, a top sheet 20 as a first sheet covering a surface on one side of the absorbent body 10, and an absorbent body A back sheet 30 as a second sheet sandwiching the sheet 10 with the top sheet 20 is provided.
　吸収体１０は、親水性繊維やパルプ等を含んだ細長い部材であり、体液や排血等の液体を効率的に吸収及び保持することができる。吸収体１０は、例えば親水性繊維又は粉体をエアレイド法によって積層して形成される。 The absorbent body 10 is an elongated member containing hydrophilic fibers, pulp and the like, and can efficiently absorb and hold liquids such as body fluid and blood drainage. The absorber 10 is formed, for example, by laminating hydrophilic fibers or powders by an air laid method.
　トップシート２０は、体液や排血等の液体を透過させる透過性のシート部材であり、使用者の肌側から吸収体１０の当該肌側に位置した全面を覆っている。すなわち、トップシート２０は、長手方向及び幅方向において吸収体１０よりも大きく形成されている。本実施形態では、トップシート２０には不織布が用いられている。図２に示すように、トップシート２０と吸収体１０との間には、トップシート２０と同様の部材によって構成されたセカンドシート２５が設けられている。 The top sheet 20 is a permeable sheet member through which fluid such as body fluid and blood drainage passes, and covers the entire surface of the absorbent body 10 from the user's skin side. That is, the top sheet 20 is formed larger than the absorber 10 in the longitudinal direction and the width direction. In the present embodiment, non-woven fabric is used for the top sheet 20. As shown in FIG. 2, between the top sheet 20 and the absorber 10, a second sheet 25 formed of the same members as the top sheet 20 is provided.
　また、トップシート２０は、厚さ方向に折り重ねられたΩ折り領域２０ｆｒを有する。より具体的には、トップシート２０は、吸収体１０の幅方向の両端側において、いったん幅方向内側に折り畳まれた後、幅方向外側に折り返されてそのまま幅方向外側に延出している。Ω折り領域２０ｆｒでは、厚さ方向にエンボス加工が施されることにより、折り重ねられたトップシート２０同士が厚さ方向に接合されている。したがって、Ω折り領域２０ｆｒは、その厚さがその他の領域（トップシート２０のΩ折り領域２０ｆｒ以外の領域）の厚さよりも厚く形成されている。 The top sheet 20 also has an Ω-folded area 20fr folded in the thickness direction. More specifically, the top sheet 20 is once folded inward in the width direction on both ends in the width direction of the absorbent body 10, and then folded outward in the width direction and directly extends outward in the width direction. In the Ω folding region 20fr, the folded top sheets 20 are joined in the thickness direction by embossing in the thickness direction. Therefore, the Ω-folded area 20fr is formed to be thicker than the other areas (areas of the top sheet 20 other than the Ω-folded area 20fr).
　図１に示すように、吸収体１０及びトップシート２０には、使用者の肌側に、一対のヒンジ部１１０と、複数の孔部１２０とが形成されている。一対のヒンジ部１１０は、吸収体１０及びトップシート２０の長手方向に延びて形成された線状の部位である。本実施形態では、一対のヒンジ部１１０は、吸収体１０及びトップシート２０に対して使用者の肌側から厚さ方向にエンボス加工等を施すことにより形成されている。複数の孔部１２０は、一対のヒンジ部１１０に挟まれた領域に形成され、吸収体１０及びトップシート２０を厚さ方向に貫通している。 As shown in FIG. 1, a pair of hinges 110 and a plurality of holes 120 are formed in the absorbent body 10 and the top sheet 20 on the user's skin side. The pair of hinges 110 are linear portions formed extending in the longitudinal direction of the absorber 10 and the top sheet 20. In the present embodiment, the pair of hinges 110 is formed by embossing the absorber 10 and the top sheet 20 in the thickness direction from the skin side of the user. The plurality of holes 120 are formed in a region sandwiched by the pair of hinges 110, and penetrate the absorber 10 and the top sheet 20 in the thickness direction.
　バックシート３０は、非透過性のシート部材であり、例えばポリエチレン等を主体としたフィルムや、スパンボンド等の不織布に通気性を有する樹脂フィルムが接合されたシート等が用いられる。バックシート３０は、トップシート２０と略同一形状を有しており、使用者の非肌側から吸収体１０の当該非肌側に位置した全面を覆っている。 The back sheet 30 is a non-permeable sheet member, and for example, a film mainly made of polyethylene or the like, a sheet in which a breathable resin film is joined to a nonwoven fabric such as a spun bond, etc. are used. The back sheet 30 has substantially the same shape as the top sheet 20, and covers the entire surface of the absorbent body 10 from the non-skin side of the user to the non-skin side.
　トップシート２０及びバックシート３０はそれぞれ、吸収体１０の幅方向外側に延出した領域を有し、当該領域を接合することによりサイドフラップ５０を形成している。なお、これに限らず、サイドフラップ５０は、トップシート２０及びバックシート３０とは異なる別の部材によって形成されていてもよい。 The top sheet 20 and the back sheet 30 each have a region extending outward in the width direction of the absorber 10, and the side flaps 50 are formed by joining the regions. In addition, not only this but the side flap 50 may be formed of another member different from the top sheet 20 and the back sheet 30.
　図１に示すように、サイドフラップ５０は、吸収体１０の長手方向中央部よりも前側に設けられた膣口当接領域から幅方向外側に延出した一対のウイング部５１と、当該膣口当接領域よりも長手方向後側の領域から幅方向外側に延出した一対のヒップフラップ部５２とを有する。なお、「膣口当接領域」とは、生理用ナプキン１の使用時において使用者の膣口と当接する領域をいう。また、サイドフラップ５０において、トップシート２０とバックシート３０との間には、サイドフラップ５０を補強するための補強シート５５が設けられている。 As shown in FIG. 1, the side flaps 50 are a pair of wing portions 51 extending outward in the width direction from a vaginal opening contact region provided on the front side of the longitudinal central portion of the absorber 10, and the vaginal opening And a pair of hip flaps 52 extending outward in the width direction from a region longitudinally rearward of the contact region. The “vaginal contact region” refers to a region that contacts the user's vaginal opening when the sanitary napkin 1 is used. Further, in the side flaps 50, a reinforcing sheet 55 for reinforcing the side flaps 50 is provided between the top sheet 20 and the back sheet 30.
　サイドフラップ５０には、生理用ナプキン１の使用時に使用者に清涼感を与える冷感領域ＣＲが設けられている。この冷感領域ＣＲは、幅方向に所定の距離を有しながら長手方向に延びる帯状の一対の領域である。本実施形態では、図２に示すように、トップシート２０の吸収体１０を覆う側の面（非肌側の面）２０ａに冷感剤を配置させることにより冷感領域ＣＲが設けられている。 The side flaps 50 are provided with a cooling sensation region CR that gives the user a refreshing sensation when the sanitary napkin 1 is used. The cooling sensation region CR is a pair of belt-like regions extending in the longitudinal direction while having a predetermined distance in the width direction. In the present embodiment, as shown in FIG. 2, a cooling sensation region CR is provided by arranging a cooling agent on the surface (surface on the non-skin side) 20 a of the top sheet 20 covering the absorber 10. .
　冷感剤は、メントールやカンファー等の清涼剤を核として、その周囲をでんぷん等の水溶性物質によって覆った多重カプセル構造を有する粒状体である。清涼剤は、通常の状態では外部に露出していないが、所定量の水分（例えば使用者の汗や水蒸気）が接触すると水溶性物質が溶解して内部の清涼剤が外部に放出される。これにより、使用者に清涼感を与えることができる。なお、これに限らず、冷感剤は、多数の細孔に分子を吸着できる多孔質材料（例えばシリカゲルやゼオライト等）によって清涼剤が覆われる構造を有する粒状体であっても良い。 The cooling agent is a granular material having a multi-capsule structure in which a cooling agent such as menthol or camphor is used as a core and the periphery thereof is covered with a water-soluble substance such as starch. The refreshing agent is not exposed to the outside in a normal state, but when a predetermined amount of water (for example, the user's sweat or water vapor) comes in contact with it, the water-soluble substance dissolves and the refreshing agent inside is released to the outside. Thereby, the user can be given a refreshing feeling. The cooling agent is not limited to this, and may be a granular body having a structure in which the cooling agent is covered with a porous material (for example, silica gel, zeolite, etc.) capable of adsorbing molecules to a large number of pores.
＜生理用ナプキン１の製造方法＞
　次に、生理用ナプキン製造装置１４を用いた生理用ナプキン１の製造方法について説明する。 <Method of producing sanitary napkin 1>
Next, a method of manufacturing the sanitary napkin 1 using the sanitary napkin manufacturing device 14 will be described.
　本実施形態に係る生理用ナプキン１の製造方法は、第１搬送工程としてのトップシート搬送工程と、トップシート２００を加熱する加熱工程と、トップシート２００の少なくとも一部を幅方向に折り畳む折り畳み工程と、トップシート２００の一側の面に接着剤を塗布する第１接着剤塗布工程と、トップシート２００に冷感剤１６を落下させる落下工程と、第２搬送工程としてのバックシート搬送工程と、トップシート２００と接触する側の面に接着剤を塗布する第２接着剤塗布工程と、バックシート３００をトップシート２００に接触させる接触工程とを有する。 The manufacturing method of the sanitary napkin 1 according to the present embodiment includes a top sheet conveying step as a first conveying step, a heating step of heating the top sheet 200, and a folding step of folding at least a part of the top sheet 200 in the width direction. A first adhesive application step of applying an adhesive on one side of the top sheet 200, a falling step of causing the cooling agent 16 to fall on the top sheet 200, and a back sheet conveyance step as a second conveyance step And a second adhesive application step of applying an adhesive on the side in contact with the top sheet 200, and a contact step of bringing the back sheet 300 into contact with the top sheet 200.
　なお、トップシート搬送工程において搬送されるトップシート２００、及びバックシート搬送工程において搬送されるバックシート３００は、製品としての生理用ナプキン１の形状（図１参照）にカッティングされる前の帯状のものであるため、前述の＜生理用ナプキン１の構成＞において使用した符号（トップシート２０，バックシート３０）と異なる符号（トップシート２００，バックシート３００）を付している。 The top sheet 200 conveyed in the top sheet conveyance step and the back sheet 300 conveyed in the back sheet conveyance step are belt-like before being cut into the shape of the sanitary napkin 1 as a product (see FIG. 1). Since it is a thing, the code (top sheet 200, back sheet 300) different from the code (top sheet 20, back sheet 30) used in the above-mentioned <structure of sanitary napkin 1> is attached.
（生理用ナプキン製造装置１４の概略構成）
　生理用ナプキン製造装置１４の概略構成について、図３及び図４を参照して説明する。 (Schematic configuration of sanitary napkin manufacturing apparatus 14)
The schematic configuration of the sanitary napkin manufacturing apparatus 14 will be described with reference to FIGS. 3 and 4.
　図３は、生理用ナプキン製造装置１４の構成を説明する概略図である。図４は、トップシート２００の吸収体１０を覆う側の面２００ａを垂直方向から見た平面図である。図４では、Ω折り領域２０ｆｒの図示を省略すると共に、第１接着剤塗布部４４の接着剤出口４４１、落下部４６の落下口４６１、並びにトップシート２００の第１接着剤塗布部４４及び落下部４６によって隠れた部分を、それぞれ破線で示している。また、図４では、右方向をトップシート２００の搬送方向としている。 FIG. 3 is a schematic view illustrating the configuration of the sanitary napkin manufacturing apparatus 14. FIG. 4 is a plan view of the surface 200 a on the side covering the absorbent body 10 of the top sheet 200 as viewed from the vertical direction. In FIG. 4, the Ω folding area 20 fr is not shown, and the adhesive outlet 441 of the first adhesive application unit 44, the falling port 461 of the falling unit 46, and the first adhesive application unit 44 of the top sheet 200 and falling The parts hidden by the part 46 are indicated by broken lines, respectively. Further, in FIG. 4, the right direction is the conveyance direction of the top sheet 200.
　生理用ナプキン製造装置１４は、第１シート搬送部としてのトップシート搬送部４１と、第２シート搬送部としてのバックシート搬送部４２と、トップシート２００を加熱する加熱部４３と、トップシート２００の少なくとも一部を幅方向に折り畳む折り畳み部４７と、トップシート２００の吸収体１０を覆う側の面２００ａに接着剤を塗布する第１接着剤塗布部４４と、バックシート３００の吸収体１０を覆う側の面３００ａに接着剤を塗布する第２接着剤塗布部４５と、搬送されるトップシート２００に向かって冷感剤１６を落下させる落下部４６とを備える。なお、以下の説明において、吸収体１０を覆う側の面２００ａ，３００ａを単に「吸収体１０側の面２００ａ，３００ａ」とする。 The sanitary napkin manufacturing apparatus 14 includes a top sheet transport unit 41 as a first sheet transport unit, a back sheet transport unit 42 as a second sheet transport unit, a heating unit 43 for heating the top sheet 200, and a top sheet 200. The first adhesive application part 44 which applies an adhesive to the side 200 a of the side of the top sheet 200 covering the absorber 10, and the absorber 10 of the back sheet 300 The second adhesive application unit 45 applies an adhesive to the surface 300 a on the covering side, and the falling unit 46 drops the cooling agent 16 toward the conveyed top sheet 200. In the following description, the surfaces 200 a and 300 a on the side covering the absorber 10 will be simply referred to as “the surfaces 200 a and 300 a on the absorber 10 side”.
　トップシート搬送部４１は、円筒状の第１搬送ドラム４１１を有し、この第１搬送ドラム４１１の外周面４１１ａの一部にトップシート２００を保持させながら第１搬送ドラム４１１を回転させることによってトップシート２００を搬送している。本実施形態では、図３に示すように、第１搬送ドラム４１１の外周面４１１ａの最も高い位置Ｈ１においてトップシート２００が外周面４１１ａに保持されており、第１搬送ドラム４１１は回転軸を中心に時計回りに回転している。なお、第１搬送ドラム４１１の具体的な構成については後述する。 The top sheet conveyance unit 41 has a cylindrical first conveyance drum 411, and rotates the first conveyance drum 411 while holding the top sheet 200 on a part of the outer peripheral surface 411a of the first conveyance drum 411. The top sheet 200 is conveyed. In the present embodiment, as shown in FIG. 3, the top sheet 200 is held by the outer peripheral surface 411 a at the highest position H 1 of the outer peripheral surface 411 a of the first conveyance drum 411, and the first conveyance drum 411 is centered on the rotation axis. Is rotating clockwise. The specific configuration of the first conveyance drum 411 will be described later.
　また、トップシート搬送部４１は、落下部４６の落下口４６１の鉛直下方向（図３における矢印Ｙ方向）においてトップシート２００の搬送方向の上流側から下流側に向かって斜め下方向にトップシート２００を搬送する。 In addition, the top sheet conveyance unit 41 top sheet obliquely downward from the upstream side to the downstream side in the conveyance direction of the top sheet 200 in the vertically downward direction (the arrow Y direction in FIG. 3) of the falling port 461 of the falling portion 46 Transport 200.
　バックシート搬送部４２は、円筒状の第２搬送ドラム４２１を有し、この第２ドラム４２１の外周面４２１ａの一部にバックシート３００を保持させながら第２搬送ドラム４２１を回転させることによってバックシート３００を搬送している。図３に示すように、第２搬送ドラム４２１を第１搬送ドラム４１１の回転方向と逆方向に回転させることによって、バックシート搬送部４２は、搬送されるトップシート２００に向かってバックシート３００を搬送している。本実施形態では、第２搬送ドラム４２１は回転軸を中心に反時計回りに回転している。 The back sheet conveyance unit 42 has a cylindrical second conveyance drum 421, and rotates the second conveyance drum 421 while holding the back sheet 300 on a part of the outer circumferential surface 421 a of the second drum 421. The sheet 300 is conveyed. As shown in FIG. 3, by rotating the second conveyance drum 421 in the direction opposite to the rotation direction of the first conveyance drum 411, the back sheet conveyance unit 42 directs the back sheet 300 toward the conveyed top sheet 200. It is being transported. In the present embodiment, the second transport drum 421 rotates counterclockwise around the rotation axis.
　より具体的には、バックシート搬送部４２は、落下口４６１の鉛直下方向よりもトップシート２００の搬送方向の下流側において、トップシート２００の搬送方向と交差する方向からトップシート２００に向かってバックシート３００を搬送し、バックシート３００をトップシート２００に接触させる。なお、トップシート２００とバックシート３００との間には、吸収体１０、セカンドシート２５、補強シート５５、及び落下部４６から落下した冷感剤１６が挟み込まれる。 More specifically, the back sheet conveyance unit 42 moves from the direction intersecting the conveyance direction of the top sheet 200 toward the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the downward vertical direction of the drop opening 461. The back sheet 300 is conveyed to bring the back sheet 300 into contact with the top sheet 200. Between the top sheet 200 and the back sheet 300, the absorbent body 10, the second sheet 25, the reinforcing sheet 55, and the cooling agent 16 dropped from the falling portion 46 are sandwiched.
　加熱部４３は、不織布からなるトップシート２００を加熱する。加熱部４３の内部では、トップシート２００に対して使用者の肌側の面２００ｂから吸収体１０側の面２００ａに向かって加熱エアが吹き付けられる。すなわち、図３において、搬送されるトップシート２００は、厚さ方向の下側から加熱エアが吹き付けられる。トップシート２００に吹き付けられた加熱エアは、トップシート２００の厚さ方向に貫通するように流れてトップシート２００の内部まで加熱する。このとき、トップシート２００の絡み合った繊維間の隙間（空隙）が加熱エアの流路となる。 The heating unit 43 heats the top sheet 200 made of non-woven fabric. Inside the heating unit 43, heated air is blown toward the top sheet 200 from the surface 200b on the skin side of the user toward the surface 200a on the absorber 10 side. That is, in FIG. 3, heated air is blown from the lower side in the thickness direction of the conveyed top sheet 200. The heated air blown to the top sheet 200 flows so as to penetrate in the thickness direction of the top sheet 200 and heats the interior of the top sheet 200. At this time, the gap (void) between the entangled fibers of the top sheet 200 becomes a flow path of the heating air.
　加熱部４３は、第１接着剤塗布部４４よりも、トップシート２００の搬送方向の上流側に配置されている。すなわち、トップシート２００は、第１接着剤塗布部４４によって接着剤が塗布される前に加熱部４３によって加熱されることにより繊維間の空隙が広がる。 The heating unit 43 is disposed upstream of the first adhesive application unit 44 in the transport direction of the top sheet 200. That is, the top sheet 200 is heated by the heating unit 43 before the adhesive is applied by the first adhesive application unit 44, whereby the voids between the fibers are expanded.
　折り畳み部４７は、トップシート２００の幅方向において後述する第１接着剤塗布部４４によって形成される一対の接着剤塗布領域ＢＡよりも内側に前述のΩ折り領域２０ｆｒ（図１及び図２参照）を形成する。折り畳み部４７によって折り畳まれたトップシート２００は、幅方向の長さがバックシート３００の幅方向の長さよりも長い。 The folded portion 47 is the Ω-folded area 20fr described above inside the pair of adhesive application areas BA formed by the first adhesive application section 44 described later in the width direction of the top sheet 200 (see FIGS. 1 and 2). Form In the top sheet 200 folded by the folding portion 47, the length in the width direction is longer than the length in the width direction of the back sheet 300.
　第１接着剤塗布部４４は、トップシート２００の吸収体１０側の面２００ａに、例えばホットメルト接着剤等の接着剤を接触塗工により塗布する。より具体的には、図４に示すように、第１接着剤塗布部４４は、トップシート２００の幅方向に所定の間隔で配置された一対の接着剤出口４４１を有し、トップシート２００の吸収体１０側の面２００ａにトップシート２００の搬送方向に延びるように帯状に接着剤を塗布する。これにより、トップシート２００の吸収体１０側の面２００ａに接着剤塗布領域ＢＡが形成される。 The first adhesive application unit 44 applies an adhesive such as a hot melt adhesive, for example, by contact coating to the surface 200 a on the absorber 10 side of the top sheet 200. More specifically, as shown in FIG. 4, the first adhesive application unit 44 has a pair of adhesive outlets 441 arranged at predetermined intervals in the width direction of the top sheet 200, and An adhesive is applied in a strip shape so as to extend in the conveyance direction of the top sheet 200 on the surface 200 a on the absorber 10 side. Thus, the adhesive application area BA is formed on the surface 200 a of the top sheet 200 on the absorber 10 side.
　本実施形態では、接着剤塗布領域ＢＡは、冷感領域ＣＲ（図１参照）となる領域である。なお、図４において、接着剤塗布領域ＢＡのうち、接着剤が塗布されていない部分を二点鎖線で示し、接着剤が塗布された部分を網掛けのハッチングで示している。 In the present embodiment, the adhesive application area BA is an area to be the cooling sensation area CR (see FIG. 1). In FIG. 4, in the adhesive application area BA, a portion to which the adhesive is not applied is indicated by a two-dot chain line, and a portion to which the adhesive is applied is indicated by hatching.
　第２接着剤塗布部４５は、バックシート３００の吸収体１０側の面（トップシート２００と接触する側の面）３００ａのうち、少なくともトップシート２００の接着剤が塗布された領域（接着剤塗布領域ＢＡ）と接触する領域、すなわち冷感領域ＣＲとなる領域に接着剤を塗布する。なお、第２接着剤塗布部４５においても、第１接着剤塗布部４４と同様に、例えばホットメルト接着剤等の接着剤が用いられる。 The second adhesive application unit 45 is a region (adhesive application) of at least the adhesive applied to the top sheet 200 in the surface 300 a on the absorber 10 side of the back sheet 300 (the surface on the side in contact with the top sheet 200). An adhesive is applied to the area in contact with the area BA), that is, the area to be the cold area CR. In addition, also in the 2nd adhesive agent application part 45, adhesive agents, such as a hot melt adhesive agent, are used similarly to the 1st adhesive agent application part 44, for example.
　落下部４６は、搬送されるトップシート２００の接着剤塗布領域ＢＡに粒状の冷感剤１６を自重により落下させる。より具体的には、落下部４６は、一対の落下口４６１からそれぞれ、少なくとも鉛直下方向の成分を有する方向へ冷感剤１６を落下させる。換言すれば、冷感剤１６は、落下口４６１から少なくとも鉛直下方向の成分を有する方向へ落下する。 The drop unit 46 drops the granular cooling agent 16 by its own weight onto the adhesive application area BA of the top sheet 200 being conveyed. More specifically, the drop unit 46 drops the cooling agent 16 from the pair of drop openings 461 in the direction having at least the component in the vertically downward direction. In other words, the cooling agent 16 falls from the drop port 461 in the direction having at least the component in the vertically downward direction.
　「少なくとも鉛直下方向の成分を有する方向へ落下する」とは、落下部４６は落下口４６１から冷感剤１６を自重により落下させるが、例えばトップシート搬送部４１によるトップシート２００の搬送速度が速いため落下口４６１の鉛直下方向において搬送方向に沿った気流が発生し、冷感剤１６が鉛直下方向にまっすぐ落下せず気流によって飛ばされる場合が考えられることを考慮したものである。 Although “falling in the direction having at least the component in the vertically downward direction” means that the falling portion 46 causes the cooling agent 16 to fall from its falling port 461 by its own weight, but the conveying speed of the top sheet 200 by the top sheet conveying portion 41 is Since it is fast, an air flow along the transport direction is generated in the vertically downward direction of the drop port 461, and it is considered that the cooling agent 16 may be blown off by the air flow without falling straight in the vertically downward direction.
　接着剤塗布領域ＢＡに到達した冷感剤１６は、接着剤によってトップシート２００に接合されて冷感領域ＣＲが形成される。本実施形態では、落下部４６から落下する冷感剤１６の粒径が４０～８０μｍである。 The cooling agent 16 that has reached the adhesive application area BA is bonded to the top sheet 200 by the adhesive to form a cooling sensation area CR. In the present embodiment, the particle size of the cooling agent 16 falling from the falling portion 46 is 40 to 80 μm.
　落下部４６の一対の落下口４６１は、第１搬送ドラム４１１の外周面４１１ａの最も高い位置Ｈ１、及び第２搬送ドラム４２１の外周面４２１ａの最も高い位置Ｈ２よりも低い位置（鉛直下方向）に配置されている。すなわち、落下口４６１は、位置Ｈ１、位置Ｈ２、及びトップシート２００とバックシート３００との接触位置の３点を結ぶ領域内に配置されている。なお、図４では、トップシート２００の幅方向に所定の間隔で設けられた一対の落下部４６を示しているが、これに限らず、第１接着剤塗布部４４と同様に、一体となった落下部４６に一対の落下口４６１が設けられていてもよい。また、図４において、接着剤塗布領域ＢＡに冷感剤１６が散布された部分を砂地模様のハッチングで示している。 The pair of drop openings 461 of the drop unit 46 is lower than the highest position H1 of the outer circumferential surface 411a of the first conveyance drum 411 and the highest position H2 of the outer circumferential surface 421a of the second conveyance drum 421 (vertical downward direction) Is located in That is, the drop port 461 is disposed in an area connecting three points of the position H 1, the position H 2, and the contact position of the top sheet 200 and the back sheet 300. Although FIG. 4 shows the pair of falling portions 46 provided at predetermined intervals in the width direction of the top sheet 200, the present invention is not limited to this and, like the first adhesive application portion 44, they are integrated. The falling portion 46 may be provided with a pair of falling ports 461. Moreover, in FIG. 4, the part to which the cooling agent 16 was spread | dispersed to adhesive application area BA is shown by the hatching of a sand texture.
（第１搬送ドラム４１１の構成）
　次に、トップシート搬送部４１の第１搬送ドラム４１１の構成について、図５Ａ～Ｃを参照して説明する。図５Ａは、第１搬送ドラム４１１の外周面４１１ａの断面構造の説明図である。図５Ｂは、金属板４１２の説明図である。図５Ｃは、網状部材４１３の説明図である。 (Configuration of First Transport Drum 411)
Next, the configuration of the first conveyance drum 411 of the top sheet conveyance unit 41 will be described with reference to FIGS. 5A to 5C. FIG. 5A is an explanatory view of a cross-sectional structure of the outer peripheral surface 411 a of the first conveyance drum 411. FIG. 5B is an explanatory view of the metal plate 412. FIG. 5C is an explanatory view of the mesh member 413.
　第１搬送ドラム４１１の外周面４１１ａは、図５Ａに示すように、金属板４１２と網状部材４１３とを重ね合わせて構成されている。より具体的には、搬送されるトップシート２００側に金属板４１２が配置され、金属板４１２の内側に網状部材４１３が配置されている。 As shown in FIG. 5A, the outer peripheral surface 411 a of the first conveyance drum 411 is configured by overlapping the metal plate 412 and the mesh member 413. More specifically, the metal plate 412 is disposed on the side of the top sheet 200 to be conveyed, and the mesh member 413 is disposed inside the metal plate 412.
　図５Ｂに示すように、金属板４１２には、エアが通過する通気穴となる打ち抜き穴４１２ａが複数形成されている。本実施形態では、打ち抜き穴４１２ａは、丸形状を有しており、千鳥列状に配置されている。 As shown in FIG. 5B, the metal plate 412 is formed with a plurality of punched holes 412a which become air holes through which air passes. In the present embodiment, the punched holes 412a have a round shape and are arranged in a zigzag array.
　図５Ｃに示すように、網状部材４１３は、線材４１３ａを平織りして網目４１３ｂを構成した網状の部材であり、網目４１３ｂが通気穴となる。すなわち、通気穴は、金属板４１２の打ち抜き穴４１２ａと網状部材４１３の網目４１３ｂとによって構成される。網状部材４１３は、例えば金属線材を平織りした金網やプラスチックワイヤーを平織りしたプラスチック製の網で形成される。網状部材４１３の網目４１３ｂは、金属板４１２の打ち抜き穴４１２ａの直径よりも小さく設定されている。 As shown in FIG. 5C, the reticulated member 413 is a reticulated member in which the wire 413a is plain-woven to form a mesh 413b, and the mesh 413b becomes an air hole. That is, the vent holes are formed by the punched holes 412 a of the metal plate 412 and the meshes 413 b of the mesh member 413. The mesh member 413 is formed of, for example, a wire mesh obtained by plain-weaving a metal wire or a plastic mesh obtained by plain-weaving a plastic wire. The mesh 413 b of the mesh member 413 is set to be smaller than the diameter of the punched hole 412 a of the metal plate 412.
　図５Ａに示すように、第１搬送ドラム４１１では、通気穴を介して外周面４１１ａの外側から内側に向かってエアが通過している。なお、第１搬送ドラム４１１の構造についてはこの限りではない。 As shown in FIG. 5A, in the first transport drum 411, air passes inward from the outside of the outer peripheral surface 411a through the vent holes. The structure of the first transport drum 411 is not limited to this.
（トップシート２００への冷感剤１６の定着性）
　次に、トップシート２００への冷感剤１６の定着性について、図６Ａ及び図６Ｂ、図７、並びに図８を参照して説明する。 (Fixing ability of cooling agent 16 to top sheet 200)
Next, the fixability of the cooling agent 16 on the top sheet 200 will be described with reference to FIGS. 6A and 6B, FIG. 7 and FIG.
　図６Ａは、比較例に係る生理用ナプキン製造装置における落下部４６から落下した冷感剤１６の様子を説明する説明図である。図６Ｂは、本実施形態に係る生理用ナプキン製造装置１４における落下部４６から落下した冷感剤１６の様子を説明する説明図である。なお、図６Ａ及び図６Ｂにおいては、落下部４６から落下した冷感剤１６は落下口４６１の鉛直方向真下に落下するものとして説明する。 FIG. 6A is an explanatory view for explaining the appearance of the cooling agent 16 dropped from the dropping part 46 in the sanitary napkin manufacturing apparatus according to the comparative example. FIG. 6B is an explanatory view for explaining the appearance of the cooling agent 16 which has fallen from the falling portion 46 in the sanitary napkin manufacturing device 14 according to the present embodiment. 6A and 6B, the cooling agent 16 dropped from the drop unit 46 will be described as being dropped directly below the drop opening 461 in the vertical direction.
　前述したように、冷感剤１６は落下部４６の落下口４６１から自重により落下してトップシート２００の接着剤塗布領域ＢＡ（図４参照）に着弾して接着されるが、落下口４６１から落下した冷感剤１６の中には、トップシート２００の接着剤塗布領域ＢＡに接着されずに跳ね返ってしまうものもある。 As described above, the cooling agent 16 is dropped by its own weight from the drop opening 461 of the drop unit 46 and lands on the adhesive application area BA (see FIG. 4) of the top sheet 200 and is adhered thereto. Some of the dropped cooling agent 16 does not adhere to the adhesive application area BA of the top sheet 200 and may bounce back.
　図６Ａに示すように、比較例に係る生理用ナプキン製造装置では、落下口４６１の鉛直下方向（矢印Ｙ方向）においてトップシート２００が搬送方向の上流側から下流側に向かって鉛直方向に直交する方向（矢印Ｘ方向）に搬送されている。この場合、落下口４６１から落下した冷感剤１６は、搬送されるトップシート２００に対して垂直に衝突して跳ね返る。 As shown in FIG. 6A, in the sanitary napkin manufacturing apparatus according to the comparative example, the top sheet 200 is orthogonal to the vertical direction from the upstream side to the downstream side in the transport direction in the vertically downward direction (arrow Y direction) of the drop port 461 In the direction (arrow X direction). In this case, the cooling agent 16 dropped from the drop port 461 vertically collides with the top sheet 200 being conveyed and bounces back.
　一方、図６Ｂに示すように、本実施形態に係る生理用ナプキン製造装置１４では、落下口４６１の鉛直下方向においてトップシート２００が搬送方向の上流側から下流側に向かって斜め下方向に搬送されている。この場合、落下口４６１から落下した冷感剤１６は、搬送されるトップシート２００に対して斜めに衝突する。このため、トップシート２００に衝突した冷感剤１６は、トップシート２００の下方向への搬送による影響を受けて鉛直下方向の力が比較例の場合よりも小さくなり跳ね返りが小さくなる。したがって、比較例の場合よりも冷感剤１６の飛び散りが抑制される。 On the other hand, as shown in FIG. 6B, in the sanitary napkin manufacturing apparatus 14 according to this embodiment, the top sheet 200 is conveyed obliquely downward from the upstream side to the downstream side in the conveyance direction in the vertically downward direction of the drop port 461 It is done. In this case, the cooling agent 16 dropped from the drop port 461 obliquely collides with the top sheet 200 to be conveyed. For this reason, the cooling agent 16 that has collided with the top sheet 200 is affected by the conveyance in the downward direction of the top sheet 200, the force in the vertically downward direction becomes smaller than in the comparative example, and the rebounding becomes smaller. Therefore, the scattering of the cooling agent 16 is suppressed more than in the case of the comparative example.
　また、本実施形態では、前述したように冷感剤１６は多重カプセル構造をとるため、衝撃に弱く壊れやすい。これに対して、落下部４６は、冷感剤１６を自重により落下させるため、例えばスプレー等の噴射によって落下させる場合と異なり、冷感剤１６に対して衝撃を与えることなくトップシート２００に落下させることができる。 Further, in the present embodiment, as described above, since the cooling agent 16 has a multi-capsule structure, it is weak to an impact and easily broken. On the other hand, the drop section 46 drops the cooling agent 16 onto the top sheet 200 without giving an impact to the cooling agent 16, unlike the case where the cooling agent 16 is dropped by spraying, for example, because the cooling agent 16 is dropped by its own weight. It can be done.
　図７は、落下口４６１の鉛直下方向よりもトップシート２００の搬送方向の下流側において、バックシート３００がトップシート２００に接触する様子を説明する説明図である。 FIG. 7 is an explanatory view for explaining a state in which the back sheet 300 contacts the top sheet 200 on the downstream side in the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461.
　本実施形態に係る生理用ナプキン製造装置１４では、例えばトップシート搬送部４１が高速で駆動することにより落下口４６１から落下した冷感剤１６がトップシート２００に到達する前に気流の影響を受けて搬送方向の下流側へ飛ばされてしまう可能性がある。 In the sanitary napkin manufacturing apparatus 14 according to the present embodiment, for example, the top sheet conveyance unit 41 is driven at high speed, and the cooling agent 16 dropped from the drop port 461 is affected by the air flow before reaching the top sheet 200. As a result, there is a possibility of being blown downstream in the transport direction.
　落下口４６１の鉛直下方向よりもトップシート２００の搬送方向の下流側においてトップシート２００の搬送方向と交差する方向からトップシート２００に向かってバックシート３００が搬送されるため、気流によって飛ばされた冷感剤１６はトップシート２００とバックシート３００との間の領域に落下する。したがって、バックシート３００は、トップシート２００の接着剤塗布領域ＢＡに接着した冷感剤１６のみならず気流によって飛ばされた冷感剤１６も間に挟んでトップシート２００と接触する。 Since the back sheet 300 is conveyed toward the top sheet 200 from the direction intersecting the conveyance direction of the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461, the air is blown away The cooling agent 16 falls into the area between the top sheet 200 and the back sheet 300. Therefore, the back sheet 300 contacts the top sheet 200 by sandwiching not only the cooling agent 16 adhered to the adhesive application area BA of the top sheet 200 but also the cooling agent 16 blown off by the air flow.
　なお、本実施形態では、落下口４６１の中心からトップシート２００とバックシート３００との接触位置までの距離Ｄが１０ｃｍ程度であり、この距離Ｄは最大１５ｃｍ程度までが望ましい。図７において、距離Ｄは、水平方向、すなわち紙面に垂直な方向及び鉛直方向（鉛直下方向）に直交する方向（矢印Ｘ方向）における所定の距離を示す。 In the present embodiment, the distance D from the center of the drop port 461 to the contact position between the top sheet 200 and the back sheet 300 is about 10 cm, and the distance D is preferably about 15 cm at maximum. In FIG. 7, the distance D indicates a predetermined distance in the horizontal direction, that is, in the direction perpendicular to the paper surface and in the direction (arrow X direction) orthogonal to the vertical direction (vertically downward direction).
　図８は、トップシート２００の表面粗さの平均ＳＤＭ値とトップシート２００への冷感剤１６の定着性との関係を示す表である。より具体的には、トップシート２００の吸収体１０側の面２００ａの搬送方向における粗さと幅方向における粗さとの平均ＳＤＭ値に対して、落下部４６から落下した冷感剤１６がトップシート２００の吸収体１０側の面２００ａにどの程度定着（接着）しているかについて示している。 FIG. 8 is a table showing the relationship between the average SDM value of the surface roughness of the top sheet 200 and the fixability of the cooling agent 16 to the top sheet 200. More specifically, with respect to the average SDM value of the roughness in the transport direction of the surface 200 a on the absorber 10 side of the top sheet 200 and the roughness in the width direction, the cooling agent 16 dropped from the falling portion 46 is the top sheet 200 It shows about how fixed (adhered) on the surface 200 a on the side of the absorbent body 10 of FIG.
　ここで、「表面粗さのＳＤＭ値」とは、風合い計測機（例えば、カトーテック株式会社製、KES-FB4 AUTO-A）を使用した風合い計測技術（風合い計測システム、ＫＥＳシステム等とも呼ぶ）を用いて、トップシート２００の風合いを計測した場合に得られた力学特性値の１つである表面の凹凸の変動を表す表面特性値（ＳＤＭ値）のことをいう。本実施形態では、「トップシート２００の搬送方向のＳＤＭ値の平均」及び「トップシート２００の幅方向のＳＤＭ値の平均」の平均をとった値を「表面粗さの平均ＳＤＭ値」としている。 Here, “SDM value of surface roughness” means texture measurement technology (also referred to as texture measurement system, KES system, etc.) using a texture measurement machine (eg KES-FB4 AUTO-A, manufactured by Kato Tech Co., Ltd.) The surface property value (SDM value) is one of mechanical property values obtained when the texture of the top sheet 200 is measured using. In this embodiment, a value obtained by averaging “average of SDM values in the transport direction of the top sheet 200” and “average of SDM values in the width direction of the top sheet 200” is taken as “average SDM value of surface roughness”. .
　当該平均ＳＤＭ値が４．３４μｍ、４．４１μｍ、５．５９μｍ、５．４３μｍであった実施例１～４では、いずれもトップシート２００の吸収体１０側の面２００ａに対して冷感剤１６の定着性が良好であった。一方、当該平均ＳＤＭ値が０．７２μｍ、３．７０μｍ、７．８８μｍであった比較例１～３では、いずれもトップシート２００の吸収体１０側の面２００ａに対して冷感剤１６が定着しづらかった。 In Examples 1 to 4 in which the average SDM values were 4.34 μm, 4.41 μm, 5.59 μm, and 5.43 μm, the cooling agent 16 was applied to the surface 200 a of the top sheet 200 on the absorber 10 side. The fixability of the On the other hand, in Comparative Examples 1 to 3 in which the average SDM values were 0.72 μm, 3.70 μm, and 7.88 μm, the cooling agent 16 was fixed to the surface 200 a of the top sheet 200 on the absorber 10 side. It was hard to do.
　当該平均ＳＤＭ値が４μｍよりも小さい場合には、トップシート２００の吸収体１０側の面２００ａの目が細かく密であるため、落下した冷感剤１６はトップシート２００に衝突して跳ね返ってしまい定着しづらいと考えられる。また、当該平均ＳＤＭ値が６μｍよりも大きい場合には、トップシート２００の吸収体１０側の面２００ａの目が粗く隙間が多く存在するため、落下した冷感剤１６はトップシート２００を貫通してしまい定着しづらいと考えられる。これにより、当該平均ＳＤＭ値が４～６μｍの範囲にある場合、冷感剤１６は、トップシート２００の吸収体１０側の面２００ａへの定着性が良好であり、飛散しにくい。 If the average SDM value is smaller than 4 μm, the eyes of the surface 200 a on the absorber 10 side of the top sheet 200 are fine and dense, and thus the dropped cooling agent 16 collides with the top sheet 200 and bounces back. It is considered difficult to establish. When the average SDM value is larger than 6 μm, the cooling agent 16 that has fallen falls through the top sheet 200 because the surface 200 a of the top sheet 200 on the absorber 10 side is rough and there are many gaps. It is thought that it is difficult to establish it. Thereby, when the average SDM value is in the range of 4 to 6 μm, the cooling agent 16 has a good fixing property to the surface 200 a on the absorber 10 side of the top sheet 200 and is hardly scattered.
＜本実施形態の作用及び効果＞
　以上説明した実施形態によれば、以下の作用及び効果を得ることができる。 <Operation and effect of this embodiment>
According to the embodiment described above, the following actions and effects can be obtained.
（１）落下工程では、落下口４６１の鉛直下方向においてトップシート２００の搬送方向の上流側から下流側に向かって斜め下方向に搬送されるトップシート２００に対して、落下口４６１から少なくとも鉛直下方向の成分を有する方向に粒状の冷感剤１６を自重により落下させるため、落下口４６１から落下した冷感剤１６のトップシート２００に対する跳ね返りが小さくなり、冷感剤１６の飛散を抑制することができる。 (1) In the dropping step, the top sheet 200 is transported at least vertically from the dropping port 461 with respect to the top sheet 200 transported obliquely downward from the upstream side to the downstream side in the transport direction of the top sheet 200 in the vertically downward direction of the dropping port 461 Since the granular cooling agent 16 is dropped by its own weight in the direction having the downward component, the cooling agent 16 falling from the dropping port 461 is less likely to bounce back to the top sheet 200, and the scattering of the cooling agent 16 is suppressed. be able to.
（２）落下口４６１の鉛直下方向よりもトップシート２００の搬送方向の下流側において、バックシート搬送工程ではバックシート搬送部４２によってバックシート３００をトップシート２００の搬送方向と交差する方向からトップシート２００に向かって搬送し、接触工程では冷感剤１６を間に挟んでバックシート３００をトップシート２００と接触させるため、例えばトップシート搬送部４１の高速駆動によって発生する気流によって飛ばされた冷感剤１６をトップシート２００とバックシート３００との間の領域に落下させることができ、冷感剤１６の飛散をより抑制することができる。 (2) On the downstream side of the transport direction of the top sheet 200 from the vertically downward direction of the drop opening 461, in the back sheet transport process, the back sheet transport unit 42 tops the back sheet 300 from the direction intersecting the transport direction of the top sheet 200 The sheet is conveyed toward the sheet 200, and in the contact step, the cold sheet 16 is brought into contact with the top sheet 200 with the cooling agent 16 interposed therebetween. The photosensitive agent 16 can be dropped to the region between the top sheet 200 and the back sheet 300, and scattering of the cooling agent 16 can be further suppressed.
（３）第２接着剤塗布部４５は、バックシート３００のトップシート２００と接触する側の面３００ａのうち、少なくともトップシート２００の接着剤塗布領域ＢＡに接着剤を塗布するため、トップシート２００の接着剤塗布領域ＢＡに落下した冷感剤１６をバックシート３００側に塗布された接着剤でさらに接着させることにより、バックシート３００側に接着剤が塗布されていない場合と比較して、トップシート２００及びバックシート３００に対して冷感剤１６をより定着させることができる。 (3) The second adhesive application unit 45 applies the adhesive to at least the adhesive application area BA of the top sheet 200 on the side 300 a of the back sheet 300 in contact with the top sheet 200, the top sheet 200. By further adhering the cooling agent 16 dropped to the adhesive application area BA with the adhesive applied to the back sheet 300 side, the top is compared with the case where the adhesive is not applied to the back sheet 300 side. The cooling agent 16 can be further fixed to the sheet 200 and the back sheet 300.
（４）折り畳み部４７によって折り畳まれたトップシート２００は、幅方向の長さがバックシート３００よりも長いため、バックシート３００がトップシート２００に接触する際に幅方向にずれが生じた場合でも、当該ずれを吸収しながら冷感剤１６をトップシート２００とバックシート３００との間に挟み込むことができる。 (4) Since the length in the width direction of the top sheet 200 folded by the folding portion 47 is longer than that of the back sheet 300, even when the back sheet 300 comes in contact with the top sheet 200, a shift occurs in the width direction The cooling agent 16 can be sandwiched between the top sheet 200 and the back sheet 300 while absorbing the deviation.
（５）トップシート搬送部４１は、第１搬送ドラム４１１の外周面４１１ａにトップシート２００を保持させながら第１搬送ドラム４１１を回転させることによってトップシート２００を搬送するため、トップシート２００を安定して搬送することができる。また、トップシート搬送部４１は、外周面４１１ａに形成された複数の通気穴を介して外周面４１１ａの外側から内側に向かってエアを通過させるため、外周面４１１ａにおけるトップシート２００の保持がより確実となることに加え、落下口４６１から落下した冷感剤１６をエアで吸引することで飛散を抑制することができる。 (5) Since the top sheet conveyance unit 41 conveys the top sheet 200 by rotating the first conveyance drum 411 while holding the top sheet 200 on the outer circumferential surface 411 a of the first conveyance drum 411, the top sheet 200 is stabilized. Can be transported. Further, since the top sheet conveyance unit 41 allows air to pass from the outside to the inside of the outer peripheral surface 411 a through the plurality of vent holes formed in the outer peripheral surface 411 a, the holding of the top sheet 200 on the outer peripheral surface 411 a In addition to being reliable, scattering can be suppressed by sucking the cooling agent 16 dropped from the drop port 461 with air.
（６）トップシート搬送部４１では、第１搬送ドラム４１１の外周面４１１ａの最も高い位置Ｈ１においてトップシート２００が外周面４１１ａに保持されているため、位置Ｈ１からトップシート２００とバックシート３００とが接触する位置までの水平方向の領域において落下部４６を配置することができ、落下部４６の位置決めがしやすい。 (6) In the top sheet conveyance unit 41, since the top sheet 200 is held by the outer peripheral surface 411a at the highest position H1 of the outer peripheral surface 411a of the first conveyance drum 411, the top sheet 200 and the back sheet 300 are from the position H1. The drop portion 46 can be disposed in the horizontal area up to the position where the contact portion contacts, and the drop portion 46 can be easily positioned.
（７）落下部４６の落下口４６１は、第１搬送ドラム４１１の外周面４１１ａの最も高い位置Ｈ１及び第２搬送ドラム４２１の外周面４２１ａの最も高い位置Ｈ２よりも低い位置に配置されているため、落下口４６１からトップシート２００の吸収体１０側の面２００ａまでの距離を近づけることができると共に、バックシート３００からはみ出して冷感剤１６が飛散することを抑制することができる。 (7) The drop port 461 of the drop unit 46 is disposed at a position lower than the highest position H1 of the outer peripheral surface 411a of the first conveyance drum 411 and the highest position H2 of the outer peripheral surface 421a of the second conveyance drum 421 Therefore, the distance from the drop opening 461 to the surface 200 a on the absorber 10 side of the top sheet 200 can be reduced, and scattering of the cooling agent 16 from the back sheet 300 and scattering can be suppressed.
（８）落下部４６から落下する冷感剤１６の粒径が４０～８０μｍであるため、冷感剤１６がトップシート２００を貫通してしまうといった問題や、トップシート２００に対しての跳ね返りが大きくなるといった問題を回避し、冷感剤１６の飛散を抑制することができる。 (8) Since the particle size of the cooling agent 16 falling from the falling portion 46 is 40 to 80 μm, there is a problem that the cooling agent 16 penetrates the top sheet 200, or bounce back to the top sheet 200 It is possible to avoid the problem of becoming large and to suppress the scattering of the cooling agent 16.
（９）トップシート２００は不織布であり、吸収体１０側の面２００ａの表面粗さの平均ＳＤＭ値が４～６μｍであるため、落下した冷感剤１６のトップシート２００の吸収体１０側の面２００ａへの定着性がより良好になる。 (9) The top sheet 200 is a non-woven fabric, and since the average SDM value of the surface roughness of the surface 200 a on the absorber 10 side is 4 to 6 μm, the top sheet 200 of the dropped cooling agent 16 on the absorber 10 side The fixability to the surface 200a is better.
（１０）加熱部４３は、第１接着剤塗布部４４によってトップシート２００に接着剤が塗布される前にトップシート２００を加熱するため、トップシート２００の繊維間の空隙が広がり、落下した冷感剤１６のトップシート２００の吸収体１０側の面２００ａへの定着性がより良好になる。 (10) Since the heating unit 43 heats the top sheet 200 before the adhesive is applied to the top sheet 200 by the first adhesive application unit 44, the gaps between the fibers of the top sheet 200 are spread, and the dropped cold The fixability to the surface 200 a on the absorber 10 side of the top sheet 200 of the light-sensitive agent 16 is further improved.
＝＝＝その他＝＝＝
　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。本発明は、その趣旨を逸脱することなく、変更、改良され得ると共に、本発明にはその等価物が含まれることは言うまでもない。 === Others ===
The above embodiments are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. It goes without saying that the present invention can be modified and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.
　上記の実施形態では、第１シートをトップシート２００とし、第２シートをバックシート３００として説明したが、これに限らず、第１シートをバックシート３００とし、第２シートをトップシート２００としてもよい。 In the above embodiment, the first sheet is described as the top sheet 200, and the second sheet is described as the back sheet 300. However, the present invention is not limited to this. The first sheet may be the back sheet 300, and the second sheet may be the top sheet 200. Good.
　上記の実施形態では、粒状体として清涼剤を含んだ冷感剤１６について説明したが、これに限らず、例えば芳香剤等であってもよい。 In the above-mentioned embodiment, although cooling agent 16 which contained a cooling agent as a granular object was explained, it may be not only this but a fragrance etc., for example.
　上記の実施形態では、トップシート搬送部４１は第１搬送ドラム４１１を用いてトップシート２００を、バックシート搬送部４２は第２搬送ドラム４２１を用いてバックシート３００を、それぞれ搬送していたが、これに限らず、例えば複数のローラーを用いてトップシート２００及びバックシート３００を搬送してもよい。 In the above embodiment, the top sheet transport unit 41 transports the top sheet 200 using the first transport drum 411, and the back sheet transport unit 42 transports the back sheet 300 using the second transport drum 421. For example, the top sheet 200 and the back sheet 300 may be transported using a plurality of rollers.
　上記の実施形態では、落下口４６１の鉛直下方向よりもトップシート２００の搬送方向の下流側においてトップシート２００の搬送方向と交差する方向からトップシート２００に向かってバックシート３００が搬送されて、トップシート２００とバックシート３００との間の領域に落下した冷感剤１６が挟まれる旨説明したが、これに限らず、例えば落下した冷感剤１６がトップシート２００の接着剤塗布領域ＢＡ上に接着して定着した状態でトップシート２００がしばらく搬送された後にバックシート３００がトップシート２００と接触してもよい。 In the above embodiment, the back sheet 300 is conveyed toward the top sheet 200 from the direction intersecting the conveyance direction of the top sheet 200 on the downstream side of the conveyance direction of the top sheet 200 than the vertical downward direction of the drop opening 461. Although it has been described that the dropped cooling agent 16 is caught in the region between the top sheet 200 and the back sheet 300, the present invention is not limited to this. For example, the dropped cooling agent 16 is on the adhesive application region BA of the top sheet 200. The back sheet 300 may be in contact with the top sheet 200 after the top sheet 200 is conveyed for a while in a state where it is adhered and fixed to the sheet.
　上記の実施形態では、バックシート３００は、トップシート２００と接触する側の面３００ａのうち、トップシート２００の接着剤塗布領域ＢＡに接着剤が塗布されていたが、本発明を実施する際に必ずしもバックシート３００側に接着剤が塗布されている必要はない。ただし、冷感剤１６のトップシート２００及びバックシート３００に対する定着性を鑑みれば、バックシート３００側にも接着剤が塗布されていることが望ましい。 In the above embodiment, the adhesive is applied to the adhesive application area BA of the top sheet 200 in the back sheet 300 on the side 300 a in contact with the top sheet 200, but when the present invention is carried out The adhesive need not necessarily be applied to the back sheet 300 side. However, in view of the fixability of the cooling agent 16 to the top sheet 200 and the back sheet 300, it is desirable that the adhesive be applied also to the back sheet 300 side.
１…生理用ナプキン（吸収性物品）
１４…生理用ナプキン製造装置
１６…冷感剤（粒状体）
２０，２００…トップシート（第１シート）
３０，３００…バックシート（第２シート）
４１…トップシート搬送部（第１シート搬送部）
４２…バックシート搬送部
４３…加熱部
４４…第１接着剤塗布部
４５…第２接着剤塗布部
４６…落下部
４７…折り畳み部
４１１…第１搬送ドラム
４２１…第２搬送ドラム
４６１…落下口 1 ... sanitary napkin (absorbent article)
14 ... sanitary napkin manufacturing device 16 ... cooling agent (particulate body)
20, 200 ... top sheet (first sheet)
30, 300 ... back sheet (second sheet)
41: Top sheet conveyance unit (first sheet conveyance unit)
DESCRIPTION OF SYMBOLS 42 ... Back sheet conveyance part 43 ... Heating part 44 ... 1st adhesive application part 45 ... 2nd adhesive application part 46 ... Falling part 47 ... Folding part 411 ... 1st conveyance drum 421 ... 2nd conveyance drum 461 ... Drop opening

Claims (12)

  1. 　吸収性物品を構成するシート部材である第１シートを所定の搬送方向に搬送する第１搬送工程と、
    　前記第１シートの一側の面に接着剤を塗布する第１接着剤塗布工程と、
    　前記第１シートの前記接着剤が塗布された領域に粒状体を自重により落下させる落下工程と
    　を有し、
    　前記落下工程では、前記粒状体を落下させる落下口の鉛直下方向において前記搬送方向の上流側から下流側に向かって斜め下方向に搬送される前記第１シートに対して、前記落下口から少なくとも鉛直下方向の成分を有する方向に前記粒状体を落下させる、ことを特徴とする吸収性物品の製造方法。     A first conveying step of conveying a first sheet, which is a sheet member constituting the absorbent article, in a predetermined conveying direction;
    A first adhesive application step of applying an adhesive to a surface on one side of the first sheet;
    And D. dropping the granular material onto the area of the first sheet to which the adhesive is applied by its own weight;
    In the dropping step, the first sheet, which is transported obliquely downward from the upstream side to the downstream side in the transport direction in the vertically downward direction of the dropping port for dropping the granular material, at least from the dropping port The method of manufacturing an absorbent article, wherein the granular material is dropped in a direction having a vertically downward component.
  2. 　請求項１に記載の吸収性物品の製造方法であって、
    　前記落下口の鉛直下方向よりも前記第１シートの搬送方向の下流側において、
    　前記第１シート共に前記吸収性物品を構成する第２シートを前記第１シートの搬送方向と交差する方向から前記第１シートに向かって搬送する第２搬送工程と、
    　前記粒状体を間に挟んで前記第２シートを前記第１シートと接触させる接触工程と
    　を有する、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
    On the downstream side of the transport direction of the first sheet than the vertical downward direction of the drop opening,
    A second conveying step of conveying the second sheet constituting the absorbent article together with the first sheet toward the first sheet from a direction intersecting the conveying direction of the first sheet;
    And a contacting step of bringing the second sheet into contact with the first sheet with the granular body interposed therebetween.
  3. 　請求項２に記載の吸収性物品の製造方法であって、
    　前記第２シートの前記第１シートと接触する側の面のうち、少なくとも前記第１シートの前記接着剤が塗布された領域と接触する領域に接着剤を塗布する第２接着剤塗布工程を有する、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
    A second adhesive application step of applying an adhesive to at least a region of the surface of the second sheet in contact with the first sheet and in contact with at least the region to which the adhesive is applied of the first sheet , The manufacturing method of the absorbent article characterized by the above-mentioned.
  4. 　請求項２又は３に記載の吸収性物品の製造方法であって、
    　前記第１接着剤塗布工程の前に前記第１シートの少なくとも一部を幅方向に折り畳む折り畳み工程を有し、
    　折り畳まれた前記第１シートは、前記幅方向の長さが前記第２シートよりも長い、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 2 or 3, wherein
    It has a folding process of folding at least a part of the first sheet in the width direction before the first adhesive application process,
    The method for manufacturing an absorbent article, wherein the folded first sheet has a length in the width direction longer than that of the second sheet.
  5. 　請求項１～４のいずれかに記載の吸収性物品の製造方法であって、
    　前記第１搬送工程では、第１搬送ドラムの外周面に前記第１シートを保持させながら前記第１搬送ドラムを回転させることによって前記第１シートを搬送すると共に、前記外周面に形成された複数の通気穴を介して前記外周面の外側から内側に向かってエアを通過させる、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 4, wherein
    In the first conveying step, the first sheet is conveyed by rotating the first conveying drum while holding the first sheet on the outer peripheral surface of the first conveying drum, and a plurality of sheets formed on the outer peripheral surface Air is allowed to pass inward from the outside of the outer peripheral surface through the vent holes of the above.
  6. 　請求項５に記載の吸収性物品の製造方法であって、
    　前記第１搬送ドラムの前記外周面の最も高い位置において前記第１シートが前記外周面に保持されている、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 5, wherein
    A method of manufacturing an absorbent article, wherein the first sheet is held on the outer peripheral surface at the highest position of the outer peripheral surface of the first transport drum.
  7. 　請求項５又は６に記載の吸収性物品の製造方法であって、
    　前記落下口は、前記第１搬送ドラムの前記外周面の最も高い位置よりも低い位置に配置されている、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 5 or 6,
    The method for manufacturing an absorbent article, wherein the dropping port is disposed at a position lower than the highest position of the outer peripheral surface of the first transport drum.
  8. 　請求項７に記載の吸収性物品の製造方法であって、
    　前記第１シートと共に前記吸収性物品を構成する第２シートを第２搬送ドラムの外周面に保持させながら前記第２搬送ドラムを回転させることによって前記第２シートを搬送する第２搬送工程と、
    　前記粒状体を間に挟んで前記第２シートを前記第１シートと接触させる接触工程と
    　を有し、
    　前記第２搬送工程では、前記第２搬送ドラムの前記外周面の最も高い位置よりも低い位置に配置された前記落下口の鉛直下方向よりも前記第１シートの搬送方向の下流側において前記第２シートを前記第１シートの搬送方向と交差する方向から前記第１シートに向かって搬送する、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 7,
    A second conveying step of conveying the second sheet by rotating the second conveying drum while holding the second sheet constituting the absorbent article on the outer peripheral surface of the second conveying drum together with the first sheet;
    Contacting the second sheet with the first sheet with the granular body interposed therebetween;
    In the second conveying step, the second sheet may be downstream of the first sheet in the conveyance direction than the vertical downward direction of the drop opening disposed at a position lower than the highest position of the outer circumferential surface of the second conveyance drum. 2. A method of manufacturing an absorbent article, comprising: conveying the second sheet toward the first sheet from a direction intersecting the conveyance direction of the first sheet.
  9. 　請求項１～８のいずれかに記載の吸収性物品の製造方法であって、
    　前記落下工程では、粒径が４０～８０μｍである前記粒状体を落下させる、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 8, wherein
    The method of manufacturing an absorbent article, wherein the particles having a particle diameter of 40 to 80 μm are dropped in the dropping step.
  10. 　請求項１～９のいずれかに記載の吸収性物品の製造方法であって、
    　前記第１シートは不織布であり、
    　前記第１シートの前記一側の面の表面粗さの平均ＳＤＭ値が４～６μｍ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 the absorbent article according to any one of claims 1 to 9,
    The first sheet is a non-woven fabric,
    A method of manufacturing an absorbent article, wherein an average SDM value of surface roughness of the one side surface of the first sheet is 4 to 6 μm.
  11. 　請求項１０に記載の吸収性物品の製造方法であって、
    　前記第１接着剤塗布工程の前に前記第１シートを加熱する加熱工程を有する、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 10, wherein
    A method for manufacturing an absorbent article, comprising a heating step of heating the first sheet prior to the first adhesive application step.
  12. 　吸収性物品を構成するシート部材である第１シートを搬送する第１シート搬送部と、
    　前記第１シートの一側の面に接着剤を塗布する第１接着剤塗布部と、
    　搬送される前記第１シートの前記接着剤が塗布された領域に粒状体を自重により落下させる落下部と
    　を備え、
    　前記落下部は、落下口から、少なくとも鉛直下方向の成分を有する方向へ前記粒状体を落下させ、前記第１シート搬送部は、前記落下口の鉛直下方向において前記第１シートの搬送方向の上流側から下流側に向かって斜め下方向に前記第１シートを搬送する、ことを特徴とする吸収性物品の製造装置。     A first sheet conveying unit that conveys a first sheet that is a sheet member that constitutes the absorbent article;
    A first adhesive application unit for applying an adhesive to a surface on one side of the first sheet;
    And a dropping section for dropping the granular material by its own weight in the area to which the adhesive is applied of the first sheet conveyed.
    The drop unit drops the granular material from the drop opening in a direction having at least a component in the vertically downward direction, and the first sheet conveyance unit is in the conveyance direction of the first sheet in the vertically downward direction of the drop opening. An apparatus for manufacturing an absorbent article, comprising: conveying the first sheet obliquely downward from an upstream side toward a downstream side.
PCT/JP2015/075722 2014-12-25 2015-09-10 Method for producing absorbent article and device for producing absorbent article WO2016103801A1 (en)

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WO2018152994A1 (en) * 2017-02-27 2018-08-30 The Procter & Gamble Company Nonwoven substrate for wearable articles
US11730640B2 (en) 2017-02-27 2023-08-22 The Procter & Gamble Company Nonwoven substrate for wearable articles

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