WO2019064841A1 - 吸収体の製造方法 - Google Patents

吸収体の製造方法 Download PDF

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Publication number
WO2019064841A1
WO2019064841A1 PCT/JP2018/027088 JP2018027088W WO2019064841A1 WO 2019064841 A1 WO2019064841 A1 WO 2019064841A1 JP 2018027088 W JP2018027088 W JP 2018027088W WO 2019064841 A1 WO2019064841 A1 WO 2019064841A1
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WIPO (PCT)
Prior art keywords
cut
absorbent
along
manufacturing
base portion
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Application number
PCT/JP2018/027088
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English (en)
French (fr)
Japanese (ja)
Inventor
小林　賢司
裕史 佐々木
慎吾 工藤
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201880061597.7A priority Critical patent/CN111107816B/zh
Publication of WO2019064841A1 publication Critical patent/WO2019064841A1/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

Definitions

  • the present invention relates to a method of producing an absorber.
  • an absorbent used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc. is placed on an air stream and is used as a raw material of an absorbent containing pulp fibers and a water absorbing polymer on the outer peripheral surface of a rotating drum. It is manufactured by suctioning and depositing in the formed recess, and then covering the piled body deposited in the recess with a water-permeable sheet material.
  • the weight of the water absorbing polymer is very heavy compared to the weight of the pulp fiber, and the dispersion of the water absorbing polymer tends to be uneven.
  • swelling inhibition such as gel blocking is likely to occur, and the absorption performance of the water-absorbing polymer can not be exhibited to the maximum.
  • Patent Documents 1 to 3 are formed by cutting the base sheet.
  • a sheet for an absorbent article comprising a plurality of absorbent units in which particles of a water absorbing polymer are dispersed on the surface of one side of the elongated base portion and the water absorbing polymer is fixed on the surface The manufacturing method of is described.
  • the present invention uses an adhesive on at least one surface of an elongated base portion having a transverse direction, a longitudinal direction longer than the transverse direction, and a thickness direction, and the elongated base portion. It is a manufacturing method of an absorber which comprises two or more absorptive units provided with particles of a fixed water absorption polymer.
  • a plurality of notches extending along the transport direction and spaced apart in the width direction which is a direction perpendicular to the transport direction are intermittently made along the transport direction.
  • a step of forming a cut portion And a coating step of coating an adhesive on one surface of the elongated base portion connected body. And a polymer spraying step of spraying particles of the water absorbing polymer on the surface to which the adhesive is applied, and fixing the particles of the water absorbing polymer to the elongated base portion connected body via the adhesive.
  • a coating step of coating an adhesive on one surface of the elongated base portion connected body and a polymer spraying step of spraying particles of the water absorbing polymer on the surface to which the adhesive is applied, and fixing the particles of the water absorbing polymer to the elongated base portion connected body via the adhesive.
  • an adhesive is interposed on at least one surface of an elongated base portion having a transverse direction, a longitudinal direction longer than the transverse direction, and a thickness direction, and the elongated base portion.
  • It is a manufacturing apparatus of the absorber which comprises two or more absorptive units provided with the particle
  • a plurality of notches extending along the transport direction and spaced apart in the width direction which is a direction perpendicular to the transport direction are intermittently made along the transport direction.
  • a long base portion connected body in which a plurality of the long base portions are connected in the width direction via non-cut portions disposed between the cut portions adjacent in the transport direction. And a substrate sheet cutting portion to be formed. And an adhesive coated portion for coating an adhesive on one surface of the elongated base portion connected body.
  • a water-absorbent polymer scattering section for dispersing particles of a water-absorbent polymer on the surface to which the adhesive is applied, and fixing the particles of the water-absorbent polymer to the elongated base unit linked body via the adhesive And By cutting the non-cut portion so as to connect the adjacent cut portions along the transport direction, the long base portion connected body is separated into a plurality of long base portions and a plurality of the long base portion connected bodies are separated.
  • An apparatus for producing an absorbent body comprising: a separating part that forms the above-mentioned absorbent unit.
  • FIG. 1 is a schematic view showing an embodiment of a manufacturing apparatus of an absorber.
  • FIG. 2 is a schematic perspective view of a cutting device in the manufacturing apparatus shown in FIG. Fig.3 (a) thru
  • or (d) are schematic which shows the form of the cut part formed in the base material sheet, and a non-cut part.
  • FIG. 4 is a schematic perspective view of a separating step of separating the elongated base portion connected body in the separating portion into a plurality of elongated base portions.
  • Fig.5 (a) and (b) is a schematic perspective view of the absorber manufactured by the manufacturing method of this invention.
  • FIG. 6 is a cross-sectional view of the absorber in FIG. 5 (a) along the II plane.
  • the present invention relates to a method of manufacturing an absorber that can solve the drawbacks of the above-mentioned prior art, and a manufacturing apparatus suitably used therefor.
  • the present invention will be described based on its preferred embodiments with reference to the drawings.
  • One embodiment of the manufacturing apparatus 10 of the absorber of the present invention is schematically shown in FIG.
  • the “longitudinal direction” or the “rotational direction” refers to the same direction (longitudinal direction) as the transport direction X of the base sheet 22, and the “lateral direction”, the “width direction” or the “axial direction”
  • the direction (Y direction) orthogonal to the conveyance direction X of the base sheet 22 is indicated.
  • the manufacturing apparatus 10 includes a base sheet cutting portion 20, an adhesive coated portion 30, a water absorbing polymer scattering portion 40, and a separating portion 70 in this order from the upstream side to the downstream side of the manufacturing process.
  • the base sheet cutting portion 20 cuts the base sheet 22 while conveying the guide roll 23 for guiding the strip-shaped base sheet 22 conveyed from the raw fabric roll 21 and the base sheet 22 downstream.
  • a cutting device 24 is provided which intermittently forms a plurality of cut portions 2 extending in the transport direction X in the transport direction X to form a long base portion connected body 22A.
  • known cutting devices such as a shear cut device, a score cut device, and a laser cutting device can be used without particular limitation.
  • the cut portion 2 will be described in detail later.
  • the cutting device 24 of the base sheet cutting portion 20 includes a rotary die cutter 24A in which a plurality of cutter blades are disposed, and a receiving roll 24B having a flat peripheral surface.
  • the plurality of cutter blades 24a arranged in the rotary die cutter 24A extend along the rotational direction (longitudinal direction X) of the rotary die cutter 24A, and the axial direction (horizontal direction Y) of the rotary die cutter 24A. They are arranged side by side at intervals.
  • flat portions 24b where the cutter blade 24a does not exist on the peripheral surface of the rotary die cutter 24A are provided between the cutter blades 24a adjacent along the rotational direction.
  • the flat portion 24b extends in the axial direction of the rotary die cutter 24A.
  • the circumferential length of the flat portion 24b in the rotational direction that is, the distance between adjacent cutter blades 24a along the transport direction X is the length of the non-cut portion 3 extending along the transport direction X formed on the base sheet 22. It corresponds to The non-cutting part 3 will be described in detail later.
  • the distance between the cutter blades 24a adjacent in the width direction Y corresponds to the distance between the notches 2 adjacent in the width direction Y formed in the base sheet 22.
  • the adhesive coated portion 30 located on the downstream side of the base sheet cutting portion 20 has one surface of the base sheet 22 (long base portion connected body 22A) in which the cut portion 2 and the non-cut portion 3 are formed.
  • the adhesive 31 is applied to the surface of the (upper surface).
  • the adhesive coating unit 30 includes a coating head 32 on the upper side facing the one surface of the base sheet 22.
  • the coating head 32 is formed to have a length corresponding to the width direction Y of the base sheet 22.
  • various known coating devices such as a method of coating in contact with a substrate sheet and coating can be used without particular limitation.
  • the water absorbing polymer scattering section 40 is provided with a polymer introducing section 42 above the base sheet 22.
  • the polymer introducing portion 42 is formed to have a length corresponding to the width direction Y of the base sheet 22.
  • Various known coating devices can be used for the polymer introduction portion 42 without particular limitation.
  • the apparatus (Hereafter, this apparatus is also called “the integrated apparatus 50.") which the adhesive agent coating part 30 and the water absorbing polymer dispersion part 40 integrated is used,
  • the adhesive coated portion 30 and the water absorbing polymer scattering portion 40 may be separately provided.
  • the adhesive coated portion 30 may be disposed on the upstream side of the device and the water absorbing polymer scattering portion 40 may be disposed on the downstream side.
  • a vacuum conveyor 60 may be disposed at a position facing the integrated device 50 and on the lower surface side of the base sheet 22 to be conveyed.
  • the vacuum conveyor 60 sucks the base sheet 22 on which the notches 2 and the non-cutting part 3 are formed to the vacuum conveyor 60 side, and the coating of the adhesive and the water absorbing polymer is carried out on one side of the base sheet 22. It is for making it easy to carry out spraying.
  • a base sheet 22 (long base portion connected body 22A) in which the notches 2 and the non-cut portion 3 are formed is disposed.
  • the vacuum conveyor 60 includes an endless air-permeable belt 63 stretched over a drive roll 61 and a plurality of driven rolls 62, and a suction box 64 disposed at a position facing the integrated device 50 with the air-permeable belt 63 interposed therebetween. And have.
  • the separation unit 70 is provided on the most downstream side in the conveyance direction X of the base sheet 22.
  • the separating part 70 cuts the non-cutting part 3 so as to connect the adjacent cutting parts 2 along the transport direction X in the elongated base part connected body 22A to which the particles of the water absorbing polymer 41 are fixed. is there.
  • the separating unit 70 applies outward force in two directions reverse to each other along the surface direction to the elongated base portion connected body 22A to which the particles of the water absorbing polymer 41 are fixed. It is configured to be able to cut the non-cutting part 3 by this outward force.
  • the separating unit 70 may use a known roll or device without particular limitation.
  • the configuration of the separation portion 70 capable of applying an outward force along the width direction Y of the base sheet 22 includes, for example, an axial direction of a circumferential surface or a rotation axis such as a crown roll or an expander roll A bow-shaped curved roll or the like may be mentioned, in which the central region of Y) protrudes outward from the lateral regions located laterally of the central region and has an outwardly convex shape.
  • tension is generated in the base sheet 22 by a tension roll to transport the base sheet 22.
  • a configuration in which an external force is generated in the direction X (longitudinal direction X) may, for example, be mentioned.
  • the non-cutting part 3 can also be cut by applying an external force such as contact resistance by a coating head or vibration by ultrasonic waves to the elongated base part connected body 22A.
  • the above description is a description of the manufacturing apparatus 10 suitably used for manufacturing the absorbent of the present invention, and hereinafter, a method of manufacturing the absorbent using the manufacturing apparatus 10 will be described.
  • the present manufacturing method is roughly divided into four steps of a cut portion forming step, a coating step, a polymer scattering step and a separating step. Each of the steps will be described below.
  • the cut portion is formed using the base sheet cutting portion 20.
  • the strip-like base material sheet 22 drawn out from the original fabric roll 21 is guided by the guide roll 23, and the base material sheet 22 is supplied between the rotary die cutter 24 A and the receiving roll 24 B in the cutting device 24.
  • a plurality of notches 2 extending along the conveyance direction X of the substrate sheet 22 and spaced in the width direction Y are intermittently provided along the conveyance direction X in the belt-like base material sheet 22.
  • a long base portion connection in which a plurality of long base portions 1a are connected in the width direction via the non-cut portions 3 disposed between the cut portions 2 adjacent in the transport direction Form a body 22A. Since the elongated base portion connected body 22A is the base sheet 22 in which the cut portion 2 and the non-cut portion 3 are formed, the elongated base portion connected body 22A and the base sheet 22 are substantially the same. It is the same thing.
  • a plurality of cutter blades 24a arranged in the rotation direction are arranged in the direction Y orthogonal to the conveyance direction X of the strip-shaped base sheet 22, and are arranged at intervals.
  • the strip-like base sheet 22 supplied between the rotary die cutter 24A and the receiving roll 24B is transported in the transport direction X (longitudinal direction X) along the transport direction X and in a direction orthogonal to the transport direction X.
  • a plurality of places are cut at intervals in the (width direction Y) to form a cut portion 2 in which one surface of the base sheet 22 and the other surface penetrate.
  • the notches 2 are extended along the longitudinal direction X corresponding to the plurality of cutter blades 24a, and a plurality of strips are formed at intervals in the width direction Y .
  • the rotary die cutter 24A has the flat portion 24b, the length of the conveyance direction X of the base sheet 22 corresponding to the length of the circumferential surface of the flat portion 24b is vacated to cut the cut portion. 2 are formed, and the non-cut portion 3 is formed between the adjacent cut portions 2 along the transport direction X.
  • the non-cut portion 3 is a portion in which the base sheet 22 is not cut by the cutter blade 24 a.
  • the non-cut portion 3 in the present embodiment is intermittently formed between the notches 2 adjacent along the transport direction X, and the entire area in the width direction Y Is continuously formed.
  • a plurality of elongated base portions 1a to be described later are formed by forming the plurality of cut portions 2 at intervals along the transport direction X and in the width direction, according to the present embodiment.
  • the cut portion 2 is formed to provide the non-cut portion 3
  • a long base portion connected body in which a plurality of long base portions 1a are connected in the width direction Y in the non-cut portion 3 22A is formed.
  • the movement of the base sheet 22 in which the cut portions 2 are formed is restricted by the non-cut portions 3 by the non-cut portions 3 being interposed between the cut portions 2 adjacent along the transport direction X.
  • the adjacent base sheets 22 the elongated base portions 1a
  • the sheet shape of the base sheet 22 in which the cut portions 2 are formed is maintained, and the structure is disturbed, as compared with the case where the base sheet 22 having the cut portions 2 not having the non-cut portions 3 is conveyed. While becoming difficult, disorder and flapping at the time of conveyance of substrate sheet 22 can be reduced, and a coating process and a polymer dispersion process which are mentioned below can be performed stably.
  • the shapes of the cut portions 2 and the non-cut portions 3 interposed therebetween are not particularly limited as long as the effects of the present invention are exhibited.
  • the non-cut portions 3 may be formed so as not to be continuous along the width direction Y of the base sheet 22, such as in a zigzag form as shown in FIG. 3 (b).
  • the non-cutting portion 3 can be effectively cut in the separation step described later.
  • the cut portion 2 is not limited to one having a linear shape along the transport direction X, and for example, as shown in FIGS. 3C and 3D, the cut portion 2 may be formed in a wave shape.
  • Body 1 can be manufactured.
  • the shape of the cutter blade 24a and the arrangement shape of the flat portion 24b in the rotary die cutter 24A are desired.
  • the cut portions 2 and the non-cut portions 3 corresponding to the shapes can be formed in the base sheet 22.
  • the vacuum conveyor 60 is operated to make the inside of the suction box 64 negative pressure.
  • the adhesive coated portion 30 coats the adhesive 31 on one surface (upper surface) of the elongated base portion connected body 22A while conveying the elongated base portion connected body 22A in the X direction.
  • the elongated base portion connected body 22A is conveyed by the vacuum conveyor 60 while the elongated base portion connected. While the body 22A is positioned on the suction box 64, the adhesive 31 is applied to the entire surface of one side (upper surface) of the elongated base portion connected body 22A by the coating head 32 in the adhesive coated portion 30.
  • the elongated substrate portion connected body 22A having the adhesive 31 coated on one surface (upper surface) in the coating step is conveyed by the vacuum conveyor 60, the elongated substrate portion Bonding applied to one surface (upper surface) of the elongated base portion connected body 22A by the polymer introducing portion 42 of the water absorbing polymer scattering portion 40 while the connected body 22A is positioned on the suction box 64
  • the particles of the water absorbing polymer 41 are dispersed on the agent 31. By dispersing the particles of the water absorbing polymer 41 in this manner, the particles of the water absorbing polymer 41 are fixed to one surface (upper surface) of the elongated base portion connected body 22A through the adhesive 31. .
  • an elongated base is applied by applying an outward force in two directions opposite to each other along the surface direction of the elongated base part connected body 22A to be transported, thereby cutting the non-cutting part 3. It is preferable to separate the part connector 22A into a plurality of the elongated base parts 1a. In this process, it is not particularly limited as long as it is an outward force in two directions opposite to each other loaded in an arbitrary direction along the XY plane in the base sheet 22, but the viewpoint of convenience of installation of the manufacturing apparatus 10 Therefore, it is preferable to apply an outward force along the X direction or the Y direction.
  • a tension roll is used as the separation unit 70
  • a pair of first tension rolls rotating in the same direction as the X direction and a downstream side of the first tension roll are installed.
  • the elongated base portion connected body 22A is conveyed between the pair of second tension rolls rotating in the same direction as the X direction at a rotational speed faster than the first tension roll, and the elongated base portion connected body Load tension along the transport direction X of 22A.
  • the base sheet 22 is reversely directed to each other so that the elongated base portion connected body 22A is elongated in the transport direction X.
  • An outward force can be applied in two directions. Since this outward force is applied to the non-cut portion 3 existing between the adjacent cut portions 2 along the longitudinal direction X, as in the case described above, the non-cut portion 3 is thereby transported. It is possible to connect the notches 2 adjacent to each other along the longitudinal direction X by cutting along the notches 2 adjacent to each other along the direction X.
  • the length L2 (see FIGS. 3A to 3D) in the transport direction X is preferably 0.1 mm or more, more preferably 0.5 mm or more, and the upper limit thereof is 200 mm or less Is preferably 100 mm or less.
  • the length L2 is preferably 0.1 mm or more and 200 mm or less, and more preferably 0.5 mm or more and 100 mm or less.
  • Such a long base portion connected body 22A for example, appropriately adjusts the distance between the cutter blade 24a and the flat portion 24b of the rotary die cutter 24A in the base sheet cutting portion 20, and the length L2 becomes the above range. As described above, the base sheet cutting portion 20 can be easily obtained.
  • the length L3 (see FIGS. 3A to 3D) in the transport direction X of the non-cut portions 3 between the notches 2 adjacent along the transport direction X is 0.1 mm or more.
  • the upper limit thereof is preferably 10 mm or less, more preferably 5 mm or less.
  • the length L3 is preferably 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less.
  • Such a long base portion connected body 22A for example, appropriately adjusts the distance between the cutter blade 24a and the flat portion 24b of the rotary die cutter 24A in the base sheet cutting portion 20, and the length L3 becomes the above range. As described above, the base sheet cutting portion 20 can be easily obtained.
  • the absorbent body 1 manufactured through the cutting portion forming step or the separating step is longer than the lateral direction Y and the lateral direction Y, as shown in FIGS. 5 (a) and 5 (b) and FIG.
  • An elongated base portion 1a having a long longitudinal direction X and a thickness direction Z, and particles of a water absorbing polymer 41 fixed to at least one surface of the elongated base portion 1a via an adhesive 31.
  • a plurality of absorbent units 1A provided with Moreover, each absorbent unit 1A is arranged so that the longitudinal direction may be at least one direction.
  • the upper surface in the thickness direction Z which is the surface to which the water-absorbent polymer 41 is fixed, is the skin-facing surface facing the wearer's skin, and the other surface of the elongated base portion 1a
  • the lower surface in a certain thickness direction Z is the non-skin opposing surface.
  • the longitudinal direction X of the absorbent unit 1A corresponds to the absorbent body It is arranged to face in the same direction as the longitudinal direction X of 1. Since the elongated base portion 1a constituting the absorbent unit 1A is formed by providing the cut portion 2 in the base sheet 22, the elongated base portion 1a and the base sheet 22 are substantially formed. Are identical to Absorbent units 1A adjacent to each other in the Y direction are separated from each other by the cut portion 2 and the non-cut portion 3 cut by the cutting step.
  • the absorber 1 shown in FIG. 5A is formed such that a plurality of cut portions 2 extend continuously along the transport direction X. From the viewpoint of preventing fluttering of the transportation of the absorber 1, as shown in FIG. 5 (b), non-cutting regions NT where the incisions 2 are not formed are arranged at both ends of the incisions 2 in the transportation direction X It is also good.
  • the length along the transport direction X of the cut portion 2 sandwiched between the non-cutting regions NT is preferably about 0.5 mm to 100 mm or less .
  • the cutter blade 24a of the rotary die cutter 24A is separated from the base sheet 22 for a certain time, or the cutter is cut on the circumferential surface of the rotary die cutter 24A. It can be formed by providing flat portion 24b where blade 24a does not exist corresponding to the length of non-cutting region NT.
  • the absorbent body 1 manufactured in the present invention is formed in a rectangular shape long in the longitudinal direction X in a state before use.
  • the absorber 1 has a length in the longitudinal direction X of about 100 mm to 1000 mm, and a length (width) in the lateral direction Y of about 50 mm to 300 mm.
  • FIG. 5B in the case where the non-cutting region NT is provided in the absorber 1, the non-cutting region NT is along the cut portion 2 adjacent along the transport direction X in the separation portion 70.
  • the length in the longitudinal direction X of the non-cutting region NT is at least longer than the length in the longitudinal direction X of the non-cutting portion 3 from the viewpoint of preventing cutting
  • the length in the longitudinal direction X is about 10 mm to 500 mm
  • the length (width) of the non-cut region NT in the transverse direction Y is about 50 mm to 300 mm.
  • the width W 2 of the elongated base portion 1 a in the transverse direction Y is 0.3 mm or more and 10 mm or less
  • the thickness is preferably 0.6 mm or more and 2 mm or less, and more preferably 0.6 mm or more and 1.8 mm or less.
  • the desired width W2 of the elongated base portion 1a in the lateral direction Y can be adjusted by adjusting the distance between the adjacent cutter blades 24a disposed in the rotary die cutter 24A used in the cutting portion forming step. It can be changed to the width.
  • the length in the longitudinal direction X of the elongated base portion 1a is preferably 0.4 mm or more and 1000 mm or less, more preferably 0.5 mm or more and 800 mm or less, and 1 mm or more and 600 mm or less More preferable.
  • the longitudinal direction X of the absorbent unit 1A is oriented in the longitudinal direction X of the absorber 1, it is preferable that three or more and one thousand or less absorbent units 1A be disposed per absorbent body, More preferably, the number is 50 or more and 500 or less. Moreover, when arranging so that the longitudinal direction X of the absorptive unit 1A may face the transverse direction Y of the absorber 1, 3 or more and 3500 or less of absorptive unit 1A may be distribute
  • the method of counting the absorbent units 1A is defined as the number when the number of absorbent units 1A intersecting the straight line is maximum when the virtual straight line is drawn in the lateral direction Y. As shown in FIG. 6, since the absorbent unit 1A is configured to include the elongated base portion 1a, the number of the absorbent units 1A and the number of elongated base portions 1a coincide with each other.
  • the length of the elongated base portion 1a in the longitudinal direction X is preferably 0.4 mm to 1000 mm, due to the configuration in which the absorbent unit 1A includes the elongated base portion 1a. It is preferable that the base material sheet cutting part 20 is comprised so that it may become 0.5 mm or more and 800 mm or less more preferably 1 mm or more and 600 mm or less more preferably.
  • the width W2 of the elongated base portion 1a in the transverse direction Y is preferably 0.3 mm to 10 mm, more preferably 0.6 mm to 2 mm, and still more preferably 0.6 mm to 1.8 mm.
  • the base sheet cutting portion 20 be configured.
  • the substrate sheet cutting portion 20 is configured such that preferably 3 or more and 1000 or less, more preferably 50 or more and 500 or less of the absorbent units 1A are disposed per absorbent body. preferable.
  • the base sheet cutting portion 20 is appropriately changed by changing the intervals of the plurality of cutter blades 24a of the rotary die cutter 24A. Can be formed.
  • the base sheet 22 is preferably a hydrophilic sheet from the viewpoints of the improvement of the liquid diffusibility in the absorbent unit and the improvement of the utilization efficiency of the water absorbent polymer 41.
  • a hydrophilic sheet for example, a sheet-like product including a hydrophilic material can be used. Examples thereof include paper, non-woven fabric, cloth, synthetic sponge formed by foaming synthetic resin and the like, and among them, even if it is thin, it has relatively high tensile strength, and from the viewpoint of being thin and capable of providing flexibility. Non-woven fabrics are preferably used.
  • These hydrophilic sheets can be used alone or in combination of two or more.
  • a hydrophilic non-woven fabric containing hydrophilic fibers as constituent fibers a hydrophilic non-woven fabric containing fibers obtained by imparting hydrophilicity to synthetic fibers as constituent fibers, and the like are preferably used.
  • the basis weight of the non-woven fabric is preferably 5 g / m 2 or more and 100 g / m 2 or less, and more preferably 10 g / m 2 or more and 40 g / m 2 or less.
  • the hydrophilic non-woven fabric for example, those known in the art such as spun-bonded non-woven fabric, melt-blown non-woven fabric, spun lace non-woven fabric, air-through non-woven fabric and the like can be used without particular limitation.
  • the water absorbing polymer 41 various materials conventionally used in the technical field of the absorbent article can be used.
  • the above can be mixed and used.
  • the particles of the water absorbing polymer 41 there are amorphous type, massive type, bowl-like type, spherical particle aggregation type, spherical type and the like from the difference in the shape, and any type can be used.
  • the basis weight of the water-absorbent polymer 41 is preferably 10 g / m 2 or more and 500 g / m 2 or less, and more preferably 50 g / m 2 or more and 300 g / m 2 or less.
  • the average particle diameter of the particles of the polymer 41 is preferably 20 ⁇ m or more and 700 ⁇ m or less, and more preferably 200 ⁇ m or more and 500 ⁇ m or less.
  • the average particle diameter of the particles of the water absorbing polymer 41 in the swollen state is preferably 200 ⁇ m or more and 3000 ⁇ m or less, and more preferably 800 ⁇ m or more and 2000 ⁇ m or less.
  • the average particle diameter of the particles of the water-absorbing polymer 41 before and after use can be determined, for example, by the measuring method described in JP-A-2017-070498.
  • a hot melt adhesive is preferably used as the adhesive 31.
  • the hot melt adhesive include styrenes and olefins.
  • SBS styrene-butadiene-styrene copolymer
  • SIS styrene-isoprene-styrene copolymer
  • SEBS hydrogenated additive of SBS
  • SEBS hydrogenated additive of SBS
  • a blend-based hot melt adhesive of SIS and SBS, or a blend-based hot melt adhesive of SIS and SEBS is preferably used from the viewpoint of easy balance between tack strength and cohesion.
  • the coating amount of the hot melt adhesive is preferably 0.5 g / m 2 or more and 100 g / m 2 or less, and more preferably 5 g / m 2 or more and 50 g / m 2 or less.
  • the absorber 1 manufactured by the manufacturing method of this invention is used suitably for an absorbent article.
  • Absorbent articles are generally used to absorb and retain excrement fluid such as urine and menstrual blood.
  • Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads and the like, but are not limited thereto, and widely include articles used for absorbing fluid discharged from the human body It is.
  • the absorbent body 1 shown in FIG. 6 is formed by using a plurality of absorbent units 1A each having an elongated base portion 1a of the same width, but the elongated base portions 1a are formed so as to have different widths. It may be done.
  • the water absorbing polymer 41 is fixed only to one surface (upper surface) of the elongated base portion 1a, but for example, the side edge portion of the elongated base portion 1a or the other
  • the water absorbing polymer 41 may be fixed also to the surface of the lower surface of the lower surface.
  • the water absorbing polymer 41 is fixed to one surface of the elongated base portion connected body 22A through the adhesive 31 by the coating step and the polymer scattering step.
  • the other surface of the elongated base portion connected body 22A is reversed so as to face the integrated device 50, and the water absorption is performed by performing the coating step and the polymer scattering step again.
  • the polymer 41 can be fixed.
  • the present invention further discloses the following manufacturing method of the absorber and its manufacturing device regarding the embodiment mentioned above.
  • ⁇ 1> Water absorption fixed to at least one surface of an elongated base portion having a transverse direction, a longitudinal direction longer than the transverse direction, and a thickness direction, and an adhesive.
  • What is claimed is: 1.
  • a method for producing an absorbent comprising a plurality of absorbent units comprising particles of a hydrophobic polymer, In the strip-like base material sheet to be transported, a plurality of notches extending along the transport direction and spaced apart in the width direction which is a direction perpendicular to the transport direction are intermittently made along the transport direction.
  • a long base portion connected body in which a plurality of the long base portions are connected in the width direction via non-cut portions disposed between the cut portions adjacent in the transport direction.
  • a step of forming a cut portion to be formed A coating step of coating an adhesive on one surface of the elongated base portion connected body;
  • ⁇ 2> The manufacturing method of the absorber as described in said ⁇ 1> which forms the said cut part so that the said non-cut part may not continue along the width direction in the said cut part formation process.
  • ⁇ 3> The manufacturing method of the absorber as described in said ⁇ 1> or ⁇ 2> which forms said cut part in linear form along the conveyance direction in said cut part formation process.
  • ⁇ 4> The manufacturing method of the absorber as described in said ⁇ 1> or ⁇ 2> which forms said cut part in the wavelike form along the conveyance direction in said cut part formation process.
  • the elongated body is connected by applying an outward force in two directions opposite to each other along the surface direction to the elongated base portion connected body, thereby cutting the non-cutting portion.
  • ⁇ 6> In the separation step, an outward force is applied along the width direction of the elongated base portion connected body to cut the non-cut portion, whereby the elongated base portion connected body has a plurality of lengths.
  • the manufacturing method of the absorber as described in said ⁇ 5> cut
  • ⁇ 7> In the separation step, an outward force is applied along the transport direction of the elongated base portion connected body to cut the non-cut portion, thereby a plurality of the elongated base portion connected bodies being the long length.
  • the length in the conveyance direction of the notches in the elongated base member assembly is 0.1 mm or more, more preferably 0.5 mm or more, and the upper limit thereof is preferably 200 mm or less
  • 100 mm or less is more preferable, and specifically, 0.1 mm or more and 200 mm or less is preferable, and 0.5 mm or more and 100 mm or less is more preferable, any of the above ⁇ 1> to ⁇ 8>
  • the length in the transport direction of the non-cut portions between adjacent cut portions along the transport direction is preferably 0.1 mm or more, more preferably 0.5 mm or more, and the upper limit thereof is 10 mm or less Is more preferably 5 mm or less, specifically 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less.
  • the width in the lateral direction of the elongated base portion is preferably 0.3 mm or more and 10 mm or less, more preferably 0.6 mm or more and 2 mm or less, and further preferably 0.6 mm or more and 1.8 mm or less.
  • the length in the longitudinal direction of the elongated base portion is preferably 0.4 mm or more and 1000 mm or less, more preferably 0.5 mm or more and 800 mm or less, and still more preferably 1 mm or more and 600 mm or less.
  • ⁇ 14> Water absorption fixed to at least one surface of an elongated base portion having a transverse direction, a longitudinal direction longer than the transverse direction, and a thickness direction, and an adhesive.
  • An apparatus for producing an absorbent comprising a plurality of absorbent units comprising particles of a hydrophobic polymer, In the strip-like base material sheet to be transported, a plurality of notches extending along the transport direction and spaced apart in the width direction which is a direction perpendicular to the transport direction are intermittently made along the transport direction.
  • a long base portion connected body in which a plurality of the long base portions are connected in the width direction via non-cut portions disposed between the cut portions adjacent in the transport direction.
  • An apparatus for manufacturing an absorbent body comprising: a separating unit that forms the absorbent unit.
  • ⁇ 16> The apparatus for manufacturing an absorbent body according to ⁇ 14> or ⁇ 15>, wherein the base sheet cutting part is configured to form the cut part in a straight line along the transport direction.
  • ⁇ 17> The apparatus for manufacturing an absorbent body according to ⁇ 14> or ⁇ 15>, wherein the base sheet cutting part is configured to form the cut part in a wave shape along the transport direction.
  • the separating unit is configured to be capable of applying outward forces in two directions, which are opposite to each other, along the surface direction to the elongated base portion connected body. > The manufacturing apparatus of the absorber as described in any one of ⁇ 17>.
  • separating unit is configured to be capable of applying an outward force along the width direction of the elongated base portion connected body.
  • the separating section is an arched curved roll in which an outer peripheral area or an axial central area of the rotation axis protrudes outward from a lateral area located to the side of the central area and has an outwardly convex shape.
  • ⁇ 21> The manufacturing apparatus of the absorbent body according to ⁇ 18>, wherein the separating unit is configured to be capable of applying an outward force along the transport direction of the elongated base portion connected body.
  • the separating unit is a tension roll that generates tension in the elongated base portion connected body along the transport direction.
  • the said separation part is a manufacturing of the absorber any one of said ⁇ 14> thru
  • the length of the cut portion in the elongated base member assembly in the transport direction is preferably 0.1 mm or more, more preferably 0.5 mm or more, and the upper limit thereof is preferably 200 mm or less, more preferably 100 mm or less
  • the base sheet cutting portion is configured, and specifically, the base sheet cutting portion is preferably configured to be 0.1 mm or more and 200 mm or less and 0.5 mm or more and 100 mm or less.
  • the manufacturing apparatus of the absorber as described in any one of said ⁇ 14> thru
  • the length in the conveyance direction of the non-cut portion between the notches adjacent to each other along the conveyance direction is preferably 0.1 mm or more, more preferably 0.5 mm or more, and the upper limit thereof is preferably 10 mm or less, more preferably
  • the base sheet cutting portion is configured to be 5 mm or less, and specifically, the base sheet cutting is preferably 0.1 mm to 10 mm, and more preferably 0.5 mm to 5 mm.
  • the manufacturing apparatus of the absorber any one of said ⁇ 14> thru
  • the width of the elongated base portion in the lateral direction is preferably 0.3 mm to 10 mm, more preferably 0.6 mm to 2 mm, and still more preferably 0.6 mm to 1.8 mm.
  • the manufacturing apparatus of the absorber any one of said ⁇ 14> thru
  • the length of the elongated base portion in the longitudinal direction is preferably 0.4 mm or more and 1000 mm or less, more preferably 0.5 mm or more and 800 mm or less, and still more preferably 1 mm or more and 600 mm or less.
  • ⁇ 28> The above-mentioned ⁇ 14>, wherein the substrate sheet cutting portion is configured such that an absorbent unit is preferably disposed at 3 or more and 1000 or less, more preferably 50 or more and 500 or less per absorbent sheet.
  • the manufacturing apparatus of the absorber as described in any one of ⁇ 27>.
  • stable adhesive coating and polymer spraying can be performed, and an absorbent can be manufactured with high productivity.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2018/027088 2017-09-28 2018-07-19 吸収体の製造方法 WO2019064841A1 (ja)

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JP2017070501A (ja) * 2015-10-07 2017-04-13 花王株式会社 シート状物及びシート状物の製造方法
JP2017070496A (ja) * 2015-10-07 2017-04-13 花王株式会社 吸収性物品
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JP5495823B2 (ja) * 2010-01-29 2014-05-21 ユニ・チャーム株式会社 吸収性物品の製造方法
JP5898150B2 (ja) * 2013-09-02 2016-04-06 花王株式会社 吸収性物品
JP5901703B2 (ja) * 2014-06-30 2016-04-13 ユニ・チャーム株式会社 液状物塗布方法及び液状物塗布装置
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JP2017070501A (ja) * 2015-10-07 2017-04-13 花王株式会社 シート状物及びシート状物の製造方法
JP2017070496A (ja) * 2015-10-07 2017-04-13 花王株式会社 吸収性物品
JP2017070500A (ja) * 2015-10-07 2017-04-13 花王株式会社 シート状物及びシート状物の製造方法

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CN111107816A (zh) 2020-05-05
TW201919553A (zh) 2019-06-01

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