WO2016163018A1 - 吸収性物品用シートの製造方法及び製造装置 - Google Patents

吸収性物品用シートの製造方法及び製造装置 Download PDF

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Publication number
WO2016163018A1
WO2016163018A1 PCT/JP2015/061169 JP2015061169W WO2016163018A1 WO 2016163018 A1 WO2016163018 A1 WO 2016163018A1 JP 2015061169 W JP2015061169 W JP 2015061169W WO 2016163018 A1 WO2016163018 A1 WO 2016163018A1
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WO
WIPO (PCT)
Prior art keywords
sheet
shaping
roll
skin care
care agent
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Application number
PCT/JP2015/061169
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English (en)
French (fr)
Japanese (ja)
Inventor
慎一 石川
良太 河守
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to PCT/JP2015/061169 priority Critical patent/WO2016163018A1/ja
Priority to CN201580077245.7A priority patent/CN107405217B/zh
Priority to JP2015540777A priority patent/JP5881915B1/ja
Publication of WO2016163018A1 publication Critical patent/WO2016163018A1/ja

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

Definitions

  • the present invention relates to a method for producing a sheet for absorbent articles used for absorbent articles such as disposable diapers, sanitary napkins and incontinence pads.
  • an absorbent article such as a disposable diaper
  • a sheet for an absorbent article such as a nonwoven fabric used as a constituent member such as a top sheet
  • a plurality of rows of ridge-shaped protrusions and adjacent protrusions on the surface that comes into contact with the skin Those having a groove-like recess provided between the two are widely known.
  • this type of absorbent article sheet is used as a top sheet of an absorbent article, the protrusions come into contact with the skin.
  • a skin care agent may be applied to the convex portion.
  • the skin care agent Since the skin care agent is usually hydrophobic and easily repels excretory fluids such as urine when applied to the top sheet, it absorbs the excretory fluids appropriately in the absorbent body of the absorbent article while preventing skin irritation. For this purpose, it is important that the skin care agent is attached only to the convex part and not to the bottom part of the concave part.
  • Cited Document 1 uses such a principle to attach the skin care agent only to the top of the convex portion.
  • the shaped sheet itself is a sheet such as a nonwoven fabric and is basically thin. There are not a few air flows through the bottom of the recess. For this reason, a part of the sprayed skin care agent may move to the bottom of the recess due to the air flow, and a part of the skin care agent may become a shaped sheet without being affected by the air flow through the projection. In order to fall, the skin care agent is actually applied also to the bottom part of a recessed part.
  • the technical problem of the present invention is to prevent the skin care agent from being applied to the bottom of the concave portion when applying the skin care agent to the convex portion of the shaped sheet having the convex portion or the concave portion, while the skin care is applied to the convex portion. It is providing the manufacturing method and manufacturing apparatus of the sheet
  • the manufacturing method of the absorbent article sheet of the present invention is as follows. (1) By passing a continuous sheet continuous in the conveying direction between a pair of shaping rolls having an uneven portion on the outer peripheral surface and meshing with each other, the first surface and the first surface opposite to the first surface A shaping sheet forming step of forming a shaping sheet having a plurality of convex portions extending in the length direction and a plurality of concave portions provided therebetween on at least the first surface of the two surfaces; And a coating step for applying a hydrophobic skin care agent, wherein the shaped sheet has a width smaller than the width of the continuous sheet in the coating step. A method for producing a sheet for absorbent articles, wherein the skin care agent is applied to the convex portion from the first surface side while being elongated in the conveying direction.
  • the shaped sheet forming step Before the shaped sheet forming step, it has a heating step for heating the continuous sheet, and after the shaped sheet forming step, before the coating step, it has a cooling step for cooling the shaped sheet.
  • the said skin care agent is apply
  • the conveying roll has a peripheral speed faster than the peripheral speed of the pair of shaping rolls, and pulls out the shaping sheet from between the pair of shaping rolls.
  • the manufacturing apparatus of this invention is as follows. (6) At least the first surface of the first surface and the second surface opposite to the first surface has a plurality of convex portions extending in the length direction and a plurality of concave portions provided therebetween.
  • a pair of shaping rolls having a concavo-convex portion on the outer peripheral surface and meshing with each other; a conveyance roll for conveying the shaping sheet provided downstream of the pair of shaping rolls; An application member that applies the skin care agent to the convex portion of the shaped sheet, and the conveying roll extends the shaped sheet in the conveying direction so that the width is smaller than the width of the continuous sheet.
  • Sheet manufacturing equipment is Absorbent article in which the skin care agent can be applied to the convex portion from the first surface side in a state where the shaped sheet is extended in the conveying direction so that the width thereof is smaller than the width of the continuous sheet.
  • the distance between the adjacent convex portions is reduced, so that the skin care agent can be easily applied to the convex portions, while the skin care agent is applied to the bottom portion of the concave portions. It is hard to be done.
  • the shape of the convex portion can be stably maintained by the tension from both sides accompanying the width insertion, so that the skin care agent is stably and easily applied to the convex portion. be able to. As a result, it is possible to stably apply the skin care agent to the convex portion while preventing the skin care agent from being applied to the bottom of the concave portion of the shaped sheet.
  • FIG. 1 is a mimetic diagram showing an example of the manufacture device for carrying out one embodiment of the manufacturing method of the sheet for absorptive articles concerning the present invention.
  • FIG. 2 is a plan view showing an embodiment of an absorbent article sheet formed by performing the absorbent article sheet manufacturing method according to the present invention using the manufacturing apparatus of FIG. 1.
  • FIG. 3 is a perspective view of the same section.
  • FIG. 4 is a perspective view schematically showing a pair of shaping rolls of the shaping apparatus in the manufacturing apparatus of FIG. 5A is a plan view
  • FIG. 5B is a cross-sectional view schematically illustrating a state where the shaped sheet is extended in the conveying direction so that the width thereof is smaller than the width of the continuous sheet.
  • FIG.1, FIG4, FIG.5 shows an example of the manufacturing apparatus for enforcing one Embodiment of the manufacturing method of the sheet
  • this manufacturing apparatus 1 a continuous sheet 2 continuous in the conveying direction MD and having a predetermined width is wound in a roll shape, and an unwinding apparatus 3 for unwinding the continuous sheet 2 toward the conveying direction MD, and an unwinding apparatus And a preheating device 4 for preheating the continuous sheet 2 unwound by 3.
  • the shaped sheet 5 is formed by stretching the preheated continuous sheet 2 to form convex portions and concave portions on the first surface 5a and the second surface 5b opposite to the first surface 5a.
  • Device 6 Furthermore, the first conveying roll 7 that conveys the shaped sheet 5 shaped by the shaping apparatus 6 downstream in the conveying direction MD in the shaping apparatus 6 and the first conveying roll 7.
  • a second transport roll 8 disposed downstream of the transport direction MD is provided. Moreover, it arrange
  • the coating device 9 is provided.
  • the lower surface of the continuous sheet 2 is the 1st surface 2a.
  • the upper surface is the second surface 2b
  • the lower surface of the shaped sheet 5 is the first surface 5a
  • the upper surface is the second surface 5b.
  • a nonwoven fabric, a resin film, etc. can be used, and in the case of a nonwoven fabric, it is preferable to contain the thermoplastic resin fiber.
  • a non-woven fabric containing thermoplastic resin fibers is employed as the continuous sheet 2 unwound by the unwinding device 3.
  • the basis weight of the continuous sheet varies depending on the use of the absorbent article sheet to be formed, but is usually 10 to 100 g / m 2 . Further, the thickness of the continuous sheet is usually 0.1 to 5 mm, although it varies depending on the use of the absorbent article sheet to be formed.
  • the shaped sheet has convex portions and concave portions on the first surface (for example, the front surface) and the second surface (for example, the back surface), and at least the first surface of the first surface and the second surface.
  • first surface for example, the front surface
  • second surface for example, the back surface
  • first surface of the first surface and the second surface There is no particular limitation on the shape of the convex portion or the concave portion.
  • the shaped sheet 5 of this embodiment is a substantially wave-shaped sheet formed by alternately folding back to the first surface 5a and the second surface 5b.
  • FIG. 3 shows the first surface 5a as the upper side and the second surface 5b as the lower side.
  • the shaped sheet 5 has a plurality of protrusions 11 that protrude so as to protrude toward the first surface 5 a and extend in parallel with each other in the transport direction MD, and these And a plurality of recesses 12 recessed toward the second surface 5b so as to be convex toward the second surface 5b.
  • it has a plurality of dents 13 which are provided in the recess 12 and are further recessed toward the second surface 5b than the bottom 12a and project toward the second surface 5b.
  • the recess 13 is provided on the standing wall-shaped peripheral surface 15 extending toward the second surface 5 b in a state of being continuous with the bottom 12 a of the recess 12 and the end portion of the peripheral surface 15 closest to the second surface 5 b. And a bottom portion 14. Further, the peripheral surface 15 extends along the transport direction MD and extends along the width direction CD and faces the pair of first peripheral surfaces 15a and 15a disposed at positions facing each other. And a pair of second peripheral surfaces 15b, 15b disposed at positions. A hole 16 is formed in the first peripheral surface 15a so as to pass through the first peripheral surface 15a and communicate with the second surface 5b side of the shaped sheet 5, and the fiber 16 of the convex portion 11 is formed by the hole 16. The flexibility of the convex portion 11 is enhanced by releasing the tension and improving the degree of freedom of movement of the entire convex portion 11 or the fibers forming the convex portion 11.
  • the absorbent article sheet 10 is obtained by applying a skin care agent 17 to the convex portion 11 of the shaped sheet 5, and a top sheet of absorbent articles such as disposable diapers, sanitary napkins, urine pads, panty liners, etc. It is suitably used as a sheet disposed on the side of the absorbent article such as a leak-proof wall that contacts the user's skin.
  • the skin care agent used in the present invention has effects such as protection or healing on the skin of the wearer of the absorbent article that is used in the part where the absorbent article sheet is in contact with the skin surface (for example, the top sheet). Any hydrophobic one can be used without particular limitation.
  • an oily skin care agent containing a diamide derivative or an oily skin care agent used as an emollient agent in the cosmetic field or the like can be used as the skin care agent.
  • liquid paraffin, silicone oil, animal and vegetable oils eg olive oil, jojoba oil, safflower oil, squalene, squalane etc.
  • monoglyceride diglyceride, triglyceride, aliphatic ether (myristyl-1,3-dimethylbutyl ether, palmityl-1) , 3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol ester, paraffin wax, C 12 -C 22 fatty acid, C 12 ⁇ C 44 fatty ethers, C 12 ⁇ C 22 fatty alcohols, vaseline,
  • the skin care agent used in the present invention may be a gel-like composition, particularly one in which various skin care agent components are held in a gel state that can be maintained at 38 ° C.
  • a styrene elastomer in which hydrocarbon oil and silicon oil are held can be used as a skin care agent.
  • the hydrocarbon oil is not particularly limited as long as it is a compound composed of carbon and hydrogen, but for example, olefinic hydrocarbon, paraffinic hydrocarbon, acetylene hydrocarbon, hydrocarbon containing two or more double bonds and / or triple bonds.
  • cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons can be used.
  • the silicone oil for example, diorganopolysiloxanes such as dimethylpolyoxane and methylphenylpolysiloxane, and cyclic siloxanes such as cyclopentaisiloxane can be used.
  • the gel composition may contain a stabilizer, an antioxidant (for example, BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), depending on desired product characteristics. , Propyl gallate, etc.), light stabilizers, colorants, pigments, fragrances, inorganic powders, organic powders and other optional additives or other components.
  • the preheating device 4 of the manufacturing apparatus 1 includes a pair of upper and lower heating rolls 21 and 22, as shown in FIG. Then, the conveyed continuous sheet 2 is wound around a rotating lower heating roll 22, the second surface 2b of the continuous sheet 2 is brought into contact, and the second surface 2b side is heated and then rotated. The upper heating roll 21 is transferred to the upper side. Furthermore, the heated roll 21 above the first roll 2a can be brought into contact with the first roll 2a of the continuous sheet 2 that has been transferred to heat the first roll 2a. Thereby, the preheating device 4 can apply preheating to both the first surface 2 a and the second surface 2 b of the continuous sheet 2.
  • the shaping apparatus 6 is provided with a pair of upper and lower shaping rolls 25 and 26 rotating at the same peripheral speed, as shown in FIGS. 1 and 5, and these shaping rolls 25 and 26 are mutually connected. It has concave and convex portions that mesh with each other. Then, by passing the continuous sheet 2 between the pair of shaping rolls 25, 26, the position where the outer peripheral surfaces of the pair of shaping rolls 25, 26 are closest to each other is determined. As the shaping position, the shaping sheet 5 having the convex part 11, the concave part 12, and the hollow part 13 is formed.
  • the first shaping roll 25 located above is located immediately above the second shaping roll 26 located below, and the axis of the first shaping roll 25 is the axis of the second shaping roll 26.
  • the continuous sheet 2 is shaped with a shaping position between a portion located at the lowermost position in the first shaping roll 25 and a portion located at the uppermost position in the second shaping roll 26, and the convex portion 11 and the final shape of the recessed part 12 and the hollow part 13 will be decided.
  • the 1st shaping roll 25 is arrange
  • interval namely, groove width of the ditch
  • the second shaping roll 26 has a plurality of pins 29 provided at regular intervals so as to mesh with the concave grooves 28 of the first shaping roll 25 on the outer peripheral surface as the uneven portion. And a recess 30 provided between the pins 29. As shown in FIG. 4, the pins 29 are arranged at regular intervals so as not to contact the ridges 27 of the first shaping roll 25 in the roll width direction, and in the circumferential direction of the roll.
  • the second shaping rolls 26 are arranged substantially linearly at regular intervals along the outer peripheral surface.
  • variety of the recessed part 12 in the shaping sheet 5 formed by shaping the magnitude
  • FIG. Has a large roll width.
  • the 1st conveyance roll 7 and the 2nd conveyance roll 8 of this embodiment have a roll width larger than the width
  • the first transport roll 7 and the second transport roll 8 have the same size and the same shape, and have the same outer diameter and roll width.
  • the uppermost portion of the first transport roll 7 and the second transport roll 8 in this embodiment has a height that is substantially the same as the height at which the shaped sheet 5 comes out between the pair of shaped rolls 25 and 26. It has become. Thereby, the shaping sheet 5 that has come out between the pair of shaping rolls 25 and 26 is conveyed substantially horizontally toward the first conveyance roll 7 and further to the second conveyance roll 8.
  • the coating device 9 applies the skin care agent 17 to the convex portion 11 of the shaped sheet 5 from the first surface 5a side of the shaped sheet 5, and the shaped sheet 5 is used as the absorbent article sheet 10. It is.
  • the application apparatus used in the present invention applies a skin care agent to the shaped sheet by spraying or discharging the skin care agent to the convex portion, or a contact type device that applies the skin care agent by bringing the application member into contact with the convex portion. Any thing such as a non-contact type can be selected.
  • the coating device 9 of this embodiment is in contact with the convex portion 11 of the shaping sheet 5 while rotating in synchronization with the conveyance of the shaping sheet 5, and a roll-shaped application member 41 for applying the skin care agent 17, A support roll 42 that supports the shaping sheet 5 when the skin care agent 17 is applied by the application member 41 is provided.
  • the application member 41 is not protruded between the application member 41 and the support roll 42 without the shaping sheet 5 crushing the projection 11 during the application process described later.
  • a gap that can contact the top of the portion 11 is formed, and the skin care agent 17 can be appropriately applied only to the convex portion.
  • the continuous sheet 2 unwound from the unwinding device 3 and conveyed along the conveying direction MD is sequentially applied to the outer peripheral surfaces of the pair of upper and lower heating rolls 21 and 22 rotating in the preheating device 4.
  • both the second surface 2b and the first surface 2a of the continuous sheet 2 are heated and preheated.
  • the preheating temperature depends on the type of thermoplastic resin fiber constituting the continuous sheet.
  • the outer peripheral surface of the heating roll The temperature is preferably about 50 to 80 ° C., more preferably about 60 to 70 ° C.
  • the continuous sheet 2 conveyed through the preheating step is loaded between a pair of upper and lower shaping rolls 25 and 26 rotating in the shaping device 6 while the concave and convex portions are meshed with each other.
  • the continuous sheet 2 is stretched and shaped by the ridges 27 and the concave grooves 28 of the first shaping roll 25 and the pins 29 and the concave parts 30 of the second shaping roll 26.
  • the protrusion 27 contacts the 2nd surface 2b of the continuous sheet 2, and pushes the part of the continuous sheet 2 in contact in the recessed part 30 of the 2nd shaping roll 26,
  • the convex part 11 of the shaping sheet 5 is shaped.
  • the plurality of pins 29 arranged in the circumferential direction are in contact with the first surface 2a of the continuous sheet 2 and the portion of the continuous sheet 2 in contact with the tip of the pin 29 is the first. 1 Push into the groove 28 of the shaping roll 25. At that time, a portion of the continuous sheet 2 sandwiched between the pin 29 and a contact portion between the pin 29 and another pin 29 adjacent in the circumferential direction of the second shaping roll is a concave groove of the first shaping roll 25. It is pushed into 28 and becomes the recess 12 of the shaped sheet 5.
  • the tip of the pin 29 of the second shaping roll 26 has a peripheral surface 15 and a bottom portion 14 by strongly pushing the portion in contact with the continuous sheet 2 into the concave groove 28 of the first shaping roll 25. A recess 13 is formed.
  • the portion of the continuous sheet 2 that has been in contact with both end portions in the width direction (roll width direction) of the tip of the pin 29 is the second shaping of the continuous sheet 2 by the protruding ridges 27 of the first shaping roll 25. With the help of the tension when pushed in the direction of the roll 26, the thermoplastic resin fibers are scraped or broken to form the holes 16.
  • the pin 29 of the second shaping roll 26 places the contact portion of the continuous sheet 2 on the first shaping roll. It is pushed into the concave groove 28 of the shape roll 25 to form the bottom 14 having a higher fiber density than other portions. Thereby, the rigidity of the shaped sheet 5 is improved and the shape of the shaped sheet 5 is stably held through the peripheral surface 15.
  • the continuous sheet is formed with at least one shaping roll of the pair of shaping rolls 25 and 26. 2 is shaped while being heated again.
  • the heating temperature of the continuous sheet with the shaping roll is preferably higher than the preheating applied to the continuous sheet in the preheating step.
  • the core sheath of polyethylene terephthalate (PET) and high density polyethylene (HDPE) In the case of a composite fiber of a mold, when a temperature of about 60 to 70 ° C. (temperature of the outer peripheral surface of the heating roll) is added as preheating in the heating process, a temperature of about 90 to 100 ° C. Temperature).
  • the conveying speed of the continuous sheet 2 upstream of the pair of shaping rolls 25, 26 is made faster than the peripheral speed of the pair of shaping rolls 25, 26.
  • the conveyance speed of a continuous sheet is determined according to the height of the convex part of the shaping sheet to shape, the depth of a recessed part, the raw material of a continuous sheet, etc.
  • the drawing step is performed.
  • the shaping sheet 5 is made to be a pair of shaping rolls 25 by the first conveyance roll 7 by making the circumferential speed of the first conveyance roll 7 faster than the circumferential speed of the pair of shaping rolls 25, 26. , 26.
  • the peripheral speed of the first transport roll 7 is faster than the peripheral speed of the pair of shaping rolls 25 and 26, so that the shaping sheet 5 that has passed between the pair of shaping rolls 25 and 26 is transported in the transport direction.
  • the tension in the MD direction acts.
  • the peripheral speed of the first transport roll 7 is such that tension is applied in the transport direction MD to the shaped sheet 5 that has passed between the pair of shaped rolls 25, 26, and the shaped sheet 5
  • the width of the continuous sheet 2 and the original width of the shaped sheet 5 are set to a speed of extending in the conveyance direction.
  • the peripheral speed of the first transport roll 7 is made faster than the peripheral speed of the pair of shaping rolls 25 and 26 in the shaping apparatus 6, and the shaping sheet 5 is made to be a pair of shaping rolls 25.
  • 26 is for taking out the shaping sheet 5 from between the shaping rolls 25, 26 while maintaining the shapes of the convex portion 11, the concave portion 12, and the hollow portion 13 appropriately. Further, as will be described later, this is to facilitate the application of the skin care agent 17 only to the convex portions 11 in the application step.
  • a cooling process for cooling the shaped sheet 5 drawn from between the pair of shaping rolls 25 and 26 by the drawing process is performed.
  • This cooling process removes the heat remaining in the shaped sheet 5 by heating the continuous sheet 2 in the preheating process and the shaped sheet forming process.
  • cooling of the shaped sheet 5 in this cooling process should just remove the heat heated by the continuous sheet 2 in the said preheating process and shaped sheet formation process, Therefore, the temperature of a shaped sheet is normal temperature (However, this In this case, it is only necessary that the temperature can be lowered to the temperature of the place where the manufacturing apparatus 1 is installed.
  • the skin care agent applied to the shaped sheet 5 in the coating step is less affected by heat, so the skin care agent 17 is heated by the heat of the shaped sheet 5. It is possible to prevent the skin care agent 17 from moving from the convex portion 11 toward the bottom portion 12 a of the concave portion 12 due to a change in the properties of the skin care agent 17 or a decrease in the viscosity of the skin care agent 17.
  • coating process which is a post process of the shaping sheet 5 pulled out between a pair of shaping rolls 25 and 26.
  • the temperature of the shaped sheet 5 is lowered by the conveyance of the above.
  • forcible cooling such as applying cooling air to the shaped sheet 5 may be performed.
  • the coating process is performed.
  • the shaped sheet 5 is extended in the conveyance direction MD so that the width is smaller than the width of the continuous sheet 2.
  • the skin care agent 17 is apply
  • the shaping sheet is a convex part to extend the shaping sheet in the conveying direction so that the width of the shaping sheet is smaller than the width of the continuous sheet which is in a state before passing between the pair of shaping rolls.
  • the skin care agent is easily and stably applied only to the skin.
  • the skin care agent is applied to the convex portion of the shaped sheet, for example, when the absorbent article sheet is used in the absorbent article, the absorption of the excretory fluid of the user of the absorbent article into the absorber is inhibited. In order to prevent this, it is important to prevent the skin care agent from being applied to the bottom of the concave portion of the shaped sheet, which is the part closest to the absorber.
  • the height difference between the top part of the convex part and the bottom part of the concave part is maintained by stably maintaining the shape of the convex part of the shaped sheet. It is conceivable to make the skin care agent easier to apply to the convex portions. In particular, when the skin care agent is applied by a contact-type coating device, deformation of the convex portion (particularly, collapse of the convex portion) should be avoided as much as possible against the pressing of the application member that directly contacts the convex portion. There is a need.
  • the distance between adjacent convex portions is reduced to the first surface of the shaped sheet at the bottom of the concave portion of the shaped sheet. It is conceivable to reduce the exposure range of the skin care agent and suppress the opportunity for the skin care agent to adhere to the bottom of the recess.
  • the shaped sheet is extended in the conveying direction so that the width is smaller than the width of the continuous sheet, the deformation of the convex portions is suppressed, and the distance between the adjacent convex portions is reduced. I am doing so.
  • This point will be described in detail.
  • both ends of the shaped sheet in the width direction In the side regions located on the both sides (extending both sides), the shaped sheet enters a width (a phenomenon in which the width becomes smaller) as it extends in the conveyance direction. At this time, as shown in FIG.
  • the force F 1 is generated in the inward direction of the ends of the regions in the width direction CD of the width direction CD of the shaped sheet 5 by the width-containing, side
  • the partial areas 50 and 50 enter the inner side of the width direction CD of the shaped sheet 5.
  • the side region 50 has a width direction CD of the shaped sheet 5 that is about 1/4 of the width of the shaped sheet 5 from the edge of the shaped sheet 5 in the width direction CD. It is the area of the part that goes inward.
  • the central region 51 is a region sandwiched between these side regions 50, 50, and is a region having a width of about 1 ⁇ 2 of the width of the shaped sheet 5.
  • the central region sandwiched between the side regions 50, 50 the 51 a reaction force to the force F 1 in the inward direction in the width direction CD of the shaped sheet 5 that occurs with a width containing the shaped sheet 5, i.e., in the width direction CD of the shaped sheet 5 in the outward direction force F 2 is generated.
  • the central region 51 is pulled in the outer direction of the width direction CD of the shaped sheet 5, and thus is large in the distance between the adjacent convex portions 11.
  • the convex portion 11 or the fibers forming the convex portion 11 is in a tension state, and the shape of the convex portion 11 is stabilized. Thereby, in the center area
  • the coating member 41 in the contact-type coating apparatus 9 as in this embodiment is in contact with the convex portion 11, it is possible to suppress the convex portion 11 from being deformed by the pressing of the coating member 41 as much as possible.
  • the application member 41 is also prevented from touching the bottom 12 a of the recess 12, the skin care agent 17 can be applied only to the protrusion 11.
  • the peripheral speed of the second transport roll 8 is the same as the peripheral speed of the first transport roll 7, and the first transport roll 7 converts the shaped sheet 5 into a pair of shaping rolls 25, 26.
  • the speed at which the shaped sheet 5 is pulled out from the gap, that is, the conveying speed of the shaped sheet 5 between the pair of shaping rolls 25 and 26 and the first conveying roll 7 is the same.
  • the shaping sheet 5 is directly pulled out from between the pair of shaping rolls 25 and 26 by the first conveyance roll 7, but the second conveyance roll 8 has a circumferential speed of the first conveyance roll 7. Therefore, the tension in the conveying direction MD by the first conveying roll 7 is continuously maintained, and as a result, the second conveying roll 8 is also between the pair of shaping rolls 25 and 26 of the shaping sheet 5. Withdrawing from is indirectly done.
  • the 2nd conveyance roll 8 becomes the shaping sheet 5 between the 1st conveyance roll 7 and a pair of shaping rolls 25 and 26 between this 2nd conveyance roll 8 and the 1st conveyance roll 7.
  • FIG. The tension in the conveying direction MD that is substantially the same as the tension in the conveying direction MD that is applied can be applied to the shaped sheet 5. Therefore, the shaping sheet 5 is approximately the same as the shaping sheet 5 between the first conveyance roll 7 and the pair of shaping rolls 25 and 26 between the second conveyance roll 8 and the first conveyance roll 7. Elongate.
  • the shaped sheet 5 extends in the conveyance direction MD even between the second conveyance roll 8 and the first conveyance roll 7, so that the width becomes smaller than the width of the continuous sheet 2.
  • the skin care agent 17 is used. It becomes easy to apply only to the convex portion 11.
  • the width of the first conveying roll 7 is smaller than that of the continuous sheet 2 between the first conveying roll 7 and the pair of shaping rolls 25 and 26. It is extended in the conveyance direction MD. Therefore, in the stage between the 1st conveyance roll 7 and a pair of shaping rolls 25 and 26, the distance between the adjacent convex parts 11 becomes small in the side part area
  • the peripheral speeds of the first transport roll and the second transport roll may be larger than the peripheral speeds of the pair of shaping rolls as long as the absorbent article sheet is not destroyed, but these first transport roll and second transport roll may be used.
  • the peripheral speed of the roll is preferably 1 to 15% greater than the peripheral speed of the pair of shaping rolls.
  • the peripheral speed of the conveying roll is less than 1% of the peripheral speed of the pair of shaping rolls, the shaped sheet is insufficiently elongated in the conveying direction, and the width of the shaping sheet is the width of the continuous sheet. It may not be smaller. Therefore, the distance between the adjacent convex portions 11 is not reduced in the side region of the shaped sheet, and the shape of the convex portion 11 may not be stable in the central region.
  • the peripheral speed of the conveyance roll exceeds 15% of the peripheral speed of the pair of shaping rolls, the tension in the conveyance direction with respect to the shaping sheet is too large, and in some cases, the shaping sheet may be broken. .
  • the skin care agent 17 is applied to the convex portion 11 by bringing the application member 41 of the coating device 9 into contact with the convex portion 11. Specifically, the coating member 41 directly contacts the convex portion 11 from the first surface 5 a side while the coating member 41 in the coating device 9 rotates in the direction along the conveyance direction MD of the shaped sheet 5. At this time, the shaped sheet 5 is in a state in which the distance between the adjacent convex portions 11 is small in the side region and the shape of the convex portion 11 is stably maintained in the central region as described above.
  • the application member 41 can be easily brought into contact only with the top of the convex portion 11 and the vicinity thereof, whereby the skin care agent 17 can be stably applied only to the convex portion 11.
  • the shaping sheet 5 of this embodiment is shaped because the hollow portion 13, more specifically, the hollow portion 13 has a bottom portion 14 that is higher in rigidity than other portions.
  • the rigidity of the sheet 5 is improved, and the shape of the shaped sheet 5 is stably held through the peripheral surface 15.
  • seat 10 for absorbent articles which is a manufacturing objective will be completed by apply
  • the absorbent article sheet 10 that has been subjected to the application process is conveyed to, for example, an absorbent article manufacturing process, and is used as, for example, a top sheet of the absorbent article.
  • the shaping sheet 5 is a conveyance direction so that the width
  • the skin care agent 17 is apply
  • the width of the concave portion 12 is reduced and the distance between the adjacent convex portions 11 is reduced, so that the skin care agent 17 can be easily applied to the top of the convex portion 11, Since the bottom 12a of the recess 12 is less exposed to the first surface 5a, the skin care agent 17 is less likely to be applied to the bottom 12a of the recess 12.
  • the shape of the convex part 11 is stabilized by the action of the force in the outer side of the width direction CD of the shaped sheet 5 in the central region 51 of the shaped sheet 5, the application of the skin care agent 17 to the convex part 11 is stable. And it can be done easily. As a result, the skin care agent 17 can be stably applied to the convex portion 11 while preventing the skin care agent 17 from being applied to the bottom portion 12a of the concave portion 12.
  • the conveying roll may be one if the shaped sheet after the shaped sheet forming step can be extended in the conveying direction so that the width is smaller than the width of the continuous sheet, or 3 It may be more than this.
  • both the drawing of the shaped sheet from between the pair of shaping rolls and the extension in the conveying direction of the shaped sheet are performed by the one conveying roll. .
  • the continuous sheet 2 is heated by the shaping roll in the shaping sheet forming step, but the heating to the continuous sheet is the heating in the preheating step, Only one of the heating and the shaping sheet forming step may be used. Or the continuous sheet may not necessarily be heated. In addition, when not actively heating the continuous sheet, the cooling step can be omitted.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2015/061169 2015-04-09 2015-04-09 吸収性物品用シートの製造方法及び製造装置 WO2016163018A1 (ja)

Priority Applications (3)

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PCT/JP2015/061169 WO2016163018A1 (ja) 2015-04-09 2015-04-09 吸収性物品用シートの製造方法及び製造装置
CN201580077245.7A CN107405217B (zh) 2015-04-09 2015-04-09 吸收性物品用片的制造方法及制造装置
JP2015540777A JP5881915B1 (ja) 2015-04-09 2015-04-09 吸収性物品用シートの製造方法及び製造装置

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Cited By (1)

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JP2017202254A (ja) * 2016-05-13 2017-11-16 花王株式会社 吸収性物品

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CN113825476B (zh) * 2019-04-19 2023-04-14 尤妮佳股份有限公司 吸收性物品

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JP2009005860A (ja) * 2007-06-27 2009-01-15 Daio Paper Corp 吸収性物品及び保湿剤保持シートの製造方法
JP2010119861A (ja) * 1999-03-23 2010-06-03 Procter & Gamble Co 使い捨て吸収物品の構成部材として使用するための繊維質不織ウェブの改良方法
JP2012055409A (ja) * 2010-09-07 2012-03-22 Daio Paper Corp 吸収性物品
JP2013078376A (ja) * 2011-09-30 2013-05-02 Unicharm Corp 吸収性物品

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JP2009232881A (ja) * 2008-03-25 2009-10-15 Uni Charm Corp 吸収性物品
JP2011131044A (ja) * 2009-11-24 2011-07-07 Kao Corp 吸収性物品
CN102573732B (zh) * 2009-12-14 2016-06-08 花王株式会社 吸收性物品的制造方法
JP5909349B2 (ja) * 2010-12-20 2016-04-26 花王株式会社 吸収性物品
JP5395101B2 (ja) * 2011-02-28 2014-01-22 大王製紙株式会社 トイレットペーパーの製造方法

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JP2010119861A (ja) * 1999-03-23 2010-06-03 Procter & Gamble Co 使い捨て吸収物品の構成部材として使用するための繊維質不織ウェブの改良方法
JP2009005860A (ja) * 2007-06-27 2009-01-15 Daio Paper Corp 吸収性物品及び保湿剤保持シートの製造方法
JP2012055409A (ja) * 2010-09-07 2012-03-22 Daio Paper Corp 吸収性物品
JP2013078376A (ja) * 2011-09-30 2013-05-02 Unicharm Corp 吸収性物品

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CN107405217B (zh) 2020-11-03
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CN107405217A (zh) 2017-11-28

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