WO2013058196A1 - Dispositif d'empilement de fibres - Google Patents

Dispositif d'empilement de fibres Download PDF

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Publication number
WO2013058196A1
WO2013058196A1 PCT/JP2012/076510 JP2012076510W WO2013058196A1 WO 2013058196 A1 WO2013058196 A1 WO 2013058196A1 JP 2012076510 W JP2012076510 W JP 2012076510W WO 2013058196 A1 WO2013058196 A1 WO 2013058196A1
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WO
WIPO (PCT)
Prior art keywords
breathable
concave
fiber
fiber stacking
plan
Prior art date
Application number
PCT/JP2012/076510
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English (en)
Japanese (ja)
Inventor
松永　竜二
浩志 丸山
知之 茂木
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.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201280049764.9A priority Critical patent/CN103874473B/zh
Publication of WO2013058196A1 publication Critical patent/WO2013058196A1/fr

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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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15626—Making fibrous pads without outer layers

Definitions

  • the present invention comprises a rotating drum having a concave portion for accumulation on the outer peripheral surface, and a fiber material such as pulp and a molded body material such as a water-absorbing polymer are stacked in the concave portion for accumulation, thereby forming a molded body (absorber) having a predetermined shape. It is related with the fiber pile apparatus used for obtaining.
  • a rotating drum having concave portions for accumulation is provided on the outer peripheral surface, and the rotating drum is rotated while pulp is provided on the outer peripheral surface.
  • the molded material is supplied in a scattered state, and the molded material is sucked into the accumulation recess by suction from the bottom surface of the accumulation recess, and the piled material in the accumulation recess is used as the accumulation recess.
  • Patent Document 1 discloses that an effective region and a non-porous region are formed on the bottom surface of the concave portion for accumulation, and the non-porous region is surrounded by the perforated region. It is described that a non-suction portion (non-porous region) that does not suck the molding material from the bottom surface is provided on the bottom surface of the accumulation recess. According to Patent Document 1, it is said that an absorber capable of stably reducing the weight per unit area can be formed by using the rotating drum having such a configuration.
  • Patent Document 2 a plurality of convex portions projecting outward in the radial direction of the drum and extending in the circumferential direction of the drum are formed over the entire air-permeable bottom surface of the concave portion for accumulation, and the convex portions are formed in the circumferential direction.
  • a rotating drum is described in which the drums are arranged continuously or intermittently and are spaced apart by a predetermined dimension in the axial direction of the drum.
  • the molded body material is piled in the space of the concave portion excluding the convex portion, so that the finally obtained molded body (absorber) is: It has a plurality of intermittently arranged low-rigidity portions formed by the convex portions, thereby having uniform rigidity and high flexibility, and is capable of efficiently absorbing bodily fluids throughout the area. .
  • the fiber product obtained by stacking the molding material in the stacking concave portion of the rotary drum is sucked from the suction means disposed opposite to the stacking concave portion.
  • the piled material may be caught in the gaps of the constituent members in the accumulation recess and the like, and may not be released smoothly from the accumulation recess.
  • the defective transfer of the piled product may cause inconveniences such as a loss of manufacturing efficiency, a loss of shape, a shift of the transfer position, and the like leading to a decrease in quality of the molded product, which is the final product.
  • the present invention is a fiber stacking apparatus comprising a rotating drum having a stacking recess on the outer peripheral surface, and the rotating drum stacks a molded body material by suction on the bottom surface of the stacking recess to form a molded body
  • the rotating drum includes a drum body and a breathable aperture member that forms a bottom surface of the accumulation recess, and the accumulation recess is disposed on the bottom surface of the accumulation recess in a circumferential direction and a width of the rotation drum.
  • a molding member having a non-breathable recessed partition section that is partitioned into a plurality of regions in the direction is arranged so as to overlap the opening member, and the opening member is not disposed in a portion corresponding to the recessed partition section.
  • a fiber stacking device having a breathable part is provided.
  • the present invention is also a method for manufacturing an absorbent body using the fiber stacking apparatus, wherein the absorbent material supplied in an air flow is sucked into the stacking recesses of the rotating drum and stacked.
  • the manufacturing method of the absorber which comprises this is provided.
  • this invention is a manufacturing method of the absorbent article which comprises an absorber and the sheet material which fixes this, Comprising: The process which fixes the absorber obtained by implementation of the said manufacturing method to the said sheet material is comprised. The manufacturing method of an absorbent article is provided.
  • the fiber stacking apparatus of the present invention it is possible to efficiently produce a molded body having a desired shape because the release of the stacked fiber in the accumulation recess of the rotating drum is smooth and hardly causes transfer failure. Moreover, according to the manufacturing method of the absorber of this invention, a high quality absorber without a shape loss etc. can be manufactured efficiently.
  • FIG. 1 is a schematic perspective view of one embodiment of the fiber stacking apparatus of the present invention.
  • FIG. 2 is a perspective view showing a rotating drum of the fiber stacking apparatus shown in FIG.
  • FIG. 3 is a diagram illustrating the configuration of the rotating drum shown in FIG.
  • FIG. 4 is a cross-sectional view showing a cross section along the drum width direction in the vicinity of the outer peripheral surface of the rotating drum shown in FIG.
  • FIG. 5A and FIG. 5B are plan views showing an example of the air-impermeable portion according to the present invention.
  • 6A is a view for explaining the flow of vacuum air in the rotating drum of the fiber stacking apparatus of the present invention
  • FIG. 6B is the flow of vacuum air in the rotating drum of the fiber stacking apparatus outside the scope of the present invention.
  • FIG. 6A is a view for explaining the flow of vacuum air in the rotating drum of the fiber stacking apparatus of the present invention
  • FIG. 6B is the flow of vacuum air in the rotating drum of the fiber stacking apparatus outside the
  • FIG. 7 is a cross-sectional view (corresponding to FIG. 4) showing a state in which the molding material is piled in the accumulation recess of the rotating drum shown in FIG.
  • FIG. 8A is a perspective view showing the piled product released from the accumulation recess shown in FIG. 7, and FIG. 8B is a cross-sectional view taken along the line II of FIG. 8A.
  • Fig.9 (a) is a perspective view which shows a part (recessed section part) of the shaping
  • FIG.9 (b) is a shaping
  • the present invention relates to a fiber stacking apparatus that can smoothly produce a molded body having a desired shape, with a smooth release of a fiber product in an accumulation recess of a rotating drum, which is unlikely to cause transfer failure.
  • FIG. 1 shows a fiber stacking apparatus 10 which is an embodiment of the fiber stacking apparatus of the present invention
  • FIGS. 2 to 4 show a rotating drum 1 provided in the fiber stacking apparatus 10. Yes.
  • the fiber stacking apparatus 10 includes a rotating drum 1 having a stacking concave portion 2 on the outer peripheral surface, and the rotary drum 1 forms a molded body by stacking the molded body material by suction on the bottom surface 2A of the stacking concave section 2. is there.
  • the fiber stacking device 10 includes a rotating drum 1 that is rotationally driven in the direction of arrow R ⁇ b> 1, a duct 11 that supplies a molded body material to the outer peripheral surface of the rotating drum 1, and an obliquely lower portion of the rotating drum 1.
  • a transfer roll 12 that is arranged and is rotationally driven in the direction of arrow R2 and a vacuum conveyor (not shown) arranged below the transfer roll 12 are provided.
  • the vacuum conveyor in the fiber stacking apparatus 10 is configured in the same manner as a normal vacuum conveyor in this type of fiber stacking apparatus, and includes an endless breathable belt stretched between a drive roll and a driven roll, and the breathable belt. And a vacuum box disposed at a position facing the transfer roll 12.
  • a vacuum box 13 is further provided between the duct 11 and the transfer roll 12 in the circumferential direction of the rotary drum 1, and a mesh belt 14 is provided between the vacuum box 13 and the rotary drum 1.
  • the windbreak plate 15 is provided close to the outer peripheral surface of the transfer roll 12 so as to pass between the transfer roll 12 and the rotary drum 1.
  • the rotating drum 1 which is a main feature of the fiber stacking apparatus 10 will be described.
  • the rotary drum 1 of this embodiment has an accumulation recess 2 on which the molded body material is stacked on the outer peripheral surface, and includes a drum body 3 and a bottom surface 2 ⁇ / b> A of the accumulation recess 2. And an opening member 4 in which a large number of ventilation holes are formed.
  • the accumulation recess 2 is continuous with the outer peripheral surface of the rotary drum 1 over the entire length in the circumferential direction.
  • the drum main body 3 is made of a rigid metallic cylindrical body, and the concave bottom surface corresponding portion 31 that overlaps the bottom surface 2A in the plan view of the concave portion for accumulation 2 is arranged in the drum width direction (rotating drum) as shown in FIG. At the center of the rotation axis direction, the direction indicated by the symbol X in the figure.
  • “plan view” refers to a case where an object (such as a concave portion for accumulation) is viewed from the outside of the normal direction of the outer peripheral surface of the rotating drum 1 (the direction perpendicular to the rotating shaft direction of the rotating drum 1). Means.
  • the concave bottom surface corresponding part 31 of the drum body 3 includes a plurality of (eight in the form shown in FIG.
  • the structure includes a non-breathable rib 33 positioned between them, and by having the through-hole 32, the recess bottom face corresponding part 31 as a whole has breathability.
  • the plurality of through holes 32 are formed at a predetermined interval in the circumferential direction of the drum body 3, and a non-breathable rib 33 is formed between the two through holes 32, 32 adjacent in the circumferential direction. It extends in the direction X.
  • the rib 33 mainly plays a role of improving the strength of the drum body 3 itself and improving the strength of the bottom of the accumulation recess 2.
  • the opening member 4 conveys vacuum air generated from the inside of the drum to the outside of the drum, and holds a molded body material such as pulp that is carried on the vacuum air.
  • the opening member 4 itself (the member itself that defines the ventilation hole) is made of a difficult or non-breathable material, a large number of ventilation holes are formed in the entire area of the opening member 4, and the accumulation recess 2 While passing through the space maintained at a negative pressure in the rotary drum 1, the vent hole functions as a suction hole for sucking the molded body material.
  • circular holes having a diameter of about 0.2 to 0.6 mm can be formed in the opening member 4 in a zigzag pattern with a pitch of about 0.4 to 1.5 mm.
  • non-breathable material examples include stainless steel, iron, aluminum, and a polymer material.
  • non-breathable material examples include a material in which micropores are formed in a member made of the non-breathable material.
  • the aperture member 4 a metal or resin mesh, a porous metal plate or a resin plate in which a large number of apertures are formed by etching or punching on a metal or resin plate, or the like can be used.
  • a metal or resin plate (stainless steel plate or the like) having a thickness of about 0.1 to 0.5 mm is formed by a method such as punching or etching. What formed many apertures is used.
  • the rotary drum 1 of this embodiment further includes a ring member 5 that forms an inner surface 2 ⁇ / b> B of the accumulation recess 2 in addition to the drum body 3 and the aperture member 4. .
  • the ring member 5 defines the length of the accumulation recess 2 in the drum width direction X (the width of the accumulation recess 2), and is provided on both sides of the outer peripheral surface of the rotating drum 1 in the width direction across the accumulation recess 2.
  • the interval between the ring member 5 on one side in the width direction and the ring member 5 on the other side is the width of the accumulation recess 2.
  • the ring member 5 has an inner end surface along the circumferential direction of the rotary drum 1 forming a part of the inner side surface 2B of the accumulation concave portion 2, and is one of the elements that determine the depth of the accumulation concave portion 2. It has become one.
  • the mounting position of the ring member 5 (interval between the pair of left and right ring members) and thickness (height of the inner end face) take into account the width of the molded body (stacked material), the amount of stacked fiber of the molded body material, and the like. It is determined.
  • the ring member 5 is non-breathable and is made of, for example, a metal plate such as a stainless steel plate, and has a thickness of about 2 to 12 mm, for example.
  • the stacking recess 2 is arranged in a plurality of regions in the circumferential direction and the width direction X of the rotating drum 1 (direction along the bottom surface 2 ⁇ / b> A of the stacking recess 2 or the outer peripheral surface of the rotating drum 1).
  • a forming member 6 having a non-breathable recessed partitioning portion 60 to be partitioned is disposed so as to overlap the opening member 4.
  • the molded member 6 will be further described.
  • the molded member 6 has the same length (width) in the drum width direction X as that of the opening member 4, and corresponds to the bottom surface of the concave portion that overlaps the bottom surface 2A in the plan view of the concave portion 2 for accumulation.
  • a portion 6A is provided at the center in the drum width direction X.
  • the “plan view” here is as described above.
  • the recess bottom face corresponding portion 6A of the molding member 6 has a non-breathable recess partition portion 60 and a plurality of openings 65 that are located in each region partitioned by the recess partition portion 60 and penetrate the molding member 6 in the thickness direction.
  • the plurality of openings 65 are separated by a recessed section 60 (linear members 61 and 62 described later) and are independent from each other.
  • metals such as stainless steel, aluminum, and iron, resins, and the like can be used.
  • non-breathability of the recessed section 60 means that the vacuum air generated from the inside of the drum does not easily pass through the member (the recessed section 60).
  • the vacuum air generated from the inside of the drum does not easily pass through the member (the recessed section 60).
  • the molded material is in the air scattered outside the drum (pulp, etc.) This includes the case where the vacuum air passing through the member cannot be adsorbed by the member (substantially no air permeability).
  • the above description applies to “non-breathability” described in this specification.
  • the non-breathability of the aperture member 4 itself the member itself that defines the vent hole
  • This is the same as the non-breathability of the partition part 60.
  • the concave section 60 is configured to include non-breathable linear members 61 and 62 extending along the bottom surface 2A of the stacking concave section 2 (the outer peripheral surface of the rotating drum 1).
  • “extends along the bottom surface 2A of the concave portion 2 for accumulation” means that the concave portion partitioning portion 60 (linear members 61, 62) and the bottom surface 2A (opening member 4) are in contact with each other. Not including both.
  • the recessed section 60 is composed of a plurality of linear members 61 in the width direction extending in the drum width direction X and a plurality of linear members 61 in the width direction.
  • a plurality of linear members 62 (four in the present embodiment) in a straight line in plan view perpendicular to 61 are formed in a lattice shape in plan view by these linear members 61, 62.
  • the opening 65 is located at the mesh portion of the lattice and has a rectangular shape in plan view.
  • the virtual outer surface formed by the outer side of the molding member 6 is flat, and the outer surface of the concave section 60 (linear members 61 and 62) is also flat in the drum width direction X and the circumferential direction. Yes.
  • the ring member-corresponding portion has a length (width) in the drum width direction X that is the same as the width of the ring member 5.
  • the both end portions 6 ⁇ / b> B of the molded member 6 have inner end surfaces along the circumferential direction of the rotary drum 1 that are flush with the inner end surface of the ring member 5.
  • An inner side surface 2B of the accumulation recess 2 is formed.
  • Both side portions 6B of the molded member 6 are made of a non-breathable member similar to the linear members 61 and 62, and the entire region thereof is non-breathable.
  • a portion where the air-permeable aperture member 4 corresponds to the recessed portion 60 of the molded member 6 (recessed portion corresponding portion). 40 has a non-breathable portion 45.
  • “non-breathability” of the non-breathable portion 45 is the same as the above-described non-breathability of the recessed section 60 and means substantially no breathability.
  • the concave section corresponding part 40 means a portion of the opening member 4 that overlaps the concave section 60 in a plan view of the stacking concave section 2.
  • the recessed section section 60 has a lattice shape in plan view
  • the recessed section partition corresponding section 40 also has a lattice shape.
  • the non-breathable portion 45 does not have a vent hole (a hole penetrating through the hole member 4 in the thickness direction) formed in another part of the hole member 4 and is non-breathable. It functions as a non-suction part that does not allow vacuum air flowing from the outside of the drum to the inside when passing through the material and does not suction from the bottom surface 2A of the accumulation recess 2.
  • FIG. 5 shows a specific example of the non-breathable portion 45.
  • the entire area of the concave section corresponding portion 40 of the opening member 4 (the portion overlapping the concave section 60 in the plan view of the stacking concave section 2) is the air-impermeable section 45.
  • compatible part 40 in the opening member 4 are not the air-impermeable part 45, but have a vent hole. That is, in the form shown in FIG. 5A, the air-impermeable portion 45 is a plurality of continuous straight lines in plan view corresponding one-to-one to the plurality of width-direction linear members 61 constituting the recessed section 60.
  • the concave portion 60 and the non-breathable portion 45 have the same shape in plan view in the concave portion 60 and the non-breathable portion 45, and both have a lattice shape in plan view. is there.
  • “the same shape” means that the recessed section 60 and the air-impermeable portion 45 are similar to each other, regardless of the difference in size between the members 60 and 45. Includes similar shapes of different sizes.
  • the air-impermeable portion 45 (45A, 45B) has a similarity ratio of 1 to the corresponding recessed section 60 (linear members 61, 62). Are in a congruent relationship with each other in plan view.
  • the non-breathable portion 45 (45A, 45B) shown in FIG. 5 (a) is a non-breathable separate member, such as a non-breathable member, at the formation site of the vent hole in the opening member 4 in which a large number of pores (vent holes) are formed. It can be formed by bonding a non-breathable member such as metal, resin, silicone or the like. Accordingly, the portion of the aperture member 4 where the non-breathable member is not joined is different from the non-breathable portion 45. Further, the non-breathable portion 45 (45A, 45B) shown in FIG.
  • 5A may be formed from a portion where the vent hole is not formed in the aperture member 4, and specifically, for example, an aperture
  • the member 4 is made of a non-breathable metal or resin plate having a large number of pores formed by etching or punching, the pores are not intentionally formed at predetermined locations on the plate.
  • the non-breathable portion 45 (45A, 45B) shown in 5 (a) can also be formed.
  • the non-breathable portion 45 can also be formed by joining the aperture member 4 (recessed portion corresponding portion 40) and the molded member 6 [recessed portion 60 (linear members 61, 62)].
  • the opening member 4 and the molding member 6 are bonded together by welding (welding) in which the joint portions of the hole member 4 and the molding member 6 are melted by heat and the melted portions are directly fused.
  • welding welding
  • the method of joining through an agent is mentioned. Since the air holes originally formed in the opening member 4 are closed by welding or an adhesive, the portion to be welded to the molding member 6 or the joint by the adhesive becomes a non-breathable portion 45.
  • FIG. 5 (b) shows an example of the non-breathable portion 45 formed of such a welded portion between the aperture member 4 and the molded member 6 or a joint portion by an adhesive.
  • the planar non-breathable portion 45 that is, the aperture member 4 and the molding member 6, is formed on the concave portion corresponding portion 40 in a planar lattice shape of the aperture member 4.
  • a plurality of joints by welding and adhesive are formed at predetermined intervals, and are discontinuously formed in both the drum width direction X and the drum circumferential direction orthogonal thereto.
  • a portion corresponding to the interval between the two adjacent non-breathable portions 45, 45 is formed with a vent hole (a vent hole originally formed in the opening member 4) and has air permeability.
  • the entire area of the concave portion corresponding portion 40 of the opening member 4 (the portion overlapping the concave portion 60 in the plan view of the concave portion 2 for accumulation) is non-breathable. 5 (b), or only a part thereof (the welded portion between the hole member 4 and the molded member 6 or the joint portion by the adhesive) is not air-permeable portion 45.
  • the entire recessed portion partitioning portion corresponding portion 40 may have “weak air permeability” having a lower air permeability than a portion other than the recessed portion partitioning portion corresponding portion 40 in the opening member 4.
  • the hole member 4 and the molded member 6 are joined to each other in the non-breathable portion 45, so that the concave section corresponding portion 40 of the hole member 4 has a vent hole. Even if it has air permeability, the air permeability can be lowered. 5A, the aperture member 4 and the molded member 6 may be joined to part or all of the air-impermeable portion 45.
  • the air-impermeable portion 45 is formed in the concave section corresponding portion 40 of the aperture member 4 (the portion overlapping the concave section 60 in the plan view of the stacking concave section 2).
  • vacuum air (indicated by an arrow in FIG. 6) flows from the outside of the drum to the inside.
  • the molding member 6 having the non-breathable recessed section 60 (linear members 61, 62) and the opening 65 is located on the windward side, and the opening does not have the non-breathable part on the leeward side.
  • the member 4 '(opening member in which a vent hole is formed in the entire region) is located (in the case outside the scope of the present invention)
  • the vacuum air not only goes straight through the opening 65 but also opens. Since it flows into the lower part of the recessed section 60 via the portion 65 and becomes a turbulent flow, when the formed material is piled up, it is transported by vacuum air as shown in the right side of FIG. 6 (b).
  • the molded body material 94 has been divided into the recessed section 60 and the aperture member 4 ′. Enter the gap 87, thereby it tends to occur inconveniences such as transfer failure or shapeless product defibrated material described above.
  • the stacking recess 2 is partitioned into a plurality of regions (openings 65) in the circumferential direction and the width direction X of the rotary drum 1 by the recess partitioning portion 60, and the plurality of openings thus formed
  • the vacuum air is likely to be turbulent, and the portions corresponding to the openings 65 in the resulting piled fabric (see FIG. 8).
  • the thick portion 95 ⁇ / b> A) in the piled-up product 95 shown is relatively small, transfer failure and shape loss are likely to occur.
  • the area of one opening 65 is 100 cm 2 or less, particularly 35 cm 2 or less, or the number of the openings 65 is 1 or more, particularly 3 or more per unit area 100 cm 2 of the bottom surface 2A of the accumulation recess 2. If so, transfer defects and loss of shape are likely to occur.
  • the recessed portion partitioning portion corresponding portion 40 of the opening member 4 is a non-breathable portion 45, the vacuum air does not flow straight through the opening 65 toward the bottom surface 2A and flows below the recessed portion partitioning portion 60.
  • the molded body material is piled up, the molded body material 94 carried by the vacuum air as shown in the figure on the right side of FIG. In addition, it does not enter the gap 87 between the recessed portion partitioning portion 60 and the opening member 4 (recessed portion partitioning portion corresponding portion 40).
  • a plurality of openings 65 are separated by the recessed section 60 and are independent from each other. Regardless of this, it is difficult to cause the above-described transfer failure of the piled product, which is caused by the piled product being caught in the gap, and the uniform pile of the molded body material in the accumulation recess 2 (opening 65). Is promoted, and a molded article having a good shape without deformation can be efficiently produced.
  • the air-impermeable portion 45 is formed by welding (welding) or bonding between the aperture member 4 (recessed portion corresponding portion 40) and the molded member 6 [recessed portion 60 (linear members 61, 62)]. It is preferably formed by joining with an agent.
  • the width of the linear members 61, 62 constituting the concave section 60 (length in the direction orthogonal to the linear direction) is W1 (see FIG. 6A), and the linear member 61 in plan view of the stacking concave section 2 is used. , 62, the width of the non-breathable portion 45 is W2 (see FIG. 6A), the width W1 and the width W2 may be the same or different. Since the flow of the vacuum air passing through the accumulation recess 2 changes depending on the size relationship between the widths W1 and W2, depending on the adjustment, the molding material enters the gap between the recess partition 60 and the opening member 4. Difficulty (clogging prevention properties), pile transferability and shape loss prevention results are different.
  • the shape-preventing property is high, for example, as in the present embodiment, when the planar view shape of each region (opening 65) of the accumulation recess 2 partitioned by the recess partition 60 is a rectangular shape, In the molded body (stacked product) obtained by stacking the molded body material in the recess 2, a rectangular portion (corresponding to a thick portion 95A described later) corresponding to the region is formed, and a desired shape is formed. A shaped molded body can be obtained stably.
  • the width W1 of the linear members 61 and 62 is set in the thickness direction of the linear concave members 60 and the concave portions 60 as shown in FIG.
  • the width W1 of the linear members 61 and 62 is the width of the portion of the linear member closest to the aperture member 4 (bottom surface 2A) (the linear members 61 and 62 and the aperture member 4). Means the width of the contact part).
  • the non-breathable portion where the width W1 of the linear members 61, 62 overlaps the linear members 61, 62 in plan view of the accumulation recess 2 It is preferable that the width W2 of 45 is smaller, that is, the air-impermeable portion 45 is wider than the corresponding linear members 61 and 62 in plan view.
  • the ratio (W1 / W2) of the width W1 to the width W2 is preferably 0.1 to 1, more preferably 0.4 to 0.8. Since the width W1 of the linear members 61 and 62 constituting the recessed section 60 influences the shape of the molded body (stacked product), it is appropriately set according to the usage of the molded body, preferably 1 ⁇ 10 mm.
  • the opening member 4, the forming member 6 and the ring member 5 described above are detachably fixed to the outer peripheral portion of the drum main body 3 in this order by bolts or the like (not shown).
  • these members fixed to the drum main body 3 are each approximately equal in length in the longitudinal direction (drum circumferential direction) of the rotating drum 1 as shown in FIG.
  • the rotating drum 1 can be assembled by fixing two to each drum body 3 for each member.
  • a rotary plate having a circular shape in plan view that rotates by receiving power from a motor such as a motor is fixed to one end of the rotary drum 1 in the drum width direction X (rotational axis direction of the rotary drum 1).
  • the drum body 3, the aperture member 4, the molding member 6 and the ring member 5 are integrally rotated around the horizontal axis by the rotation of the rotating plate.
  • a fixed plate having a circular shape in a plan view that is fixed to other constituent members of the fiber stacking device 10 and does not rotate is fixed.
  • a plate that divides the inside of the rotating drum 1 (drum body 3) into a plurality of regions in the circumferential direction is fixed to the fixed plate.
  • the inside of the rotating drum 1 (drum body 3) As shown in FIG. 1, spaces A, B, and C that are partitioned from each other are formed. That is, the spaces A to C are partitioned by the plate provided from the fixed plate toward the rotating plate. Even if the drum main body 3 or the like fixed to the rotating plate rotates, the plate fixed to the fixed plate does not rotate, and therefore the positions of the spaces A, B and C do not change and are constant.
  • a known exhaust device such as an intake fan is connected to the space A, and the interior of the space A can be maintained at a negative pressure by operating the exhaust device. While the accumulation recess 2 passes over the space A maintained at a negative pressure, the fine ventilation holes of the opening member 4 forming the bottom surface 2A of the accumulation recess 2 function as suction holes.
  • one end side of the duct 11 covers the outer peripheral surface of the rotary drum 1 positioned on the space A, and the other end side (not shown) It has a molding material introduction device.
  • the molded body material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into a duct.
  • a water-absorbing polymer introduction part for introducing water-absorbing polymer particles in the middle of the duct 11 can also be provided.
  • the transfer roll 12 has a cylindrical outer peripheral portion having air permeability, and the outer peripheral portion rotates around a horizontal axis upon receiving power from a prime mover such as a motor.
  • a prime mover such as a motor.
  • a known exhaust device such as an intake fan is connected to the space D, and the interior of the space D can be maintained at a negative pressure by operating the exhaust device.
  • the vacuum box 13 has a box-like shape having upper and lower surfaces, left and right side surfaces, and a rear surface, and has an opening that opens toward the rotating drum 1.
  • the vacuum box 13 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe (not shown), and the inside of the vacuum box 13 can be maintained at a negative pressure by the operation of the exhaust device. It is.
  • the vacuum box 13 is an apparatus for stably transferring the piled material in the accumulation recess 2 without losing its shape, and having a shape that is relatively difficult to lose its shape as in this embodiment. When 95 (see FIG. 8) is obtained, it is not particularly necessary to install it or it is not necessary to use it even if it is installed.
  • the mesh belt 14 is a belt-like breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls 16 and transfer rolls 12 to move along a predetermined path.
  • the mesh belt 14 is driven by the rotation of the transfer roll 12.
  • the mesh belt 14 is introduced onto the outer peripheral surface of the rotating drum 1 in the vicinity of the downstream end portion 11 a of the duct 11, and then between the vacuum box 13 and the rotating drum 1 and the transfer roll. 12 and the rotating drum 1 are arranged so as to pass sequentially. While the mesh belt 14 passes in front of the opening of the vacuum box 13, the mesh belt 14 is in contact with the outer peripheral surface of the rotating drum 1, and the rotating drum is near the closest portion between the transfer roll 12 and the rotating drum 1. 1 moves away from the outer peripheral surface of 1 and onto the transfer roll 12.
  • the mesh belt 14 has small pores as compared to the suction holes of the transfer roll 12, and suction from the pores of the mesh belt 14 that overlaps with the suction holes as the transfer roll 12 sucks from the suction holes. Is also done.
  • a pair of wind shield plates 15 are provided on both sides of the suction hole in the width direction of the outer peripheral surface of the transfer roll 12 so as to prevent or reduce the inflow of wind from the side, It prevents the piled-up product (molded body) released from the accumulation recess 2 from being out of shape.
  • the manufacturing method of the present embodiment includes a stacking step of sucking and stacking the absorbent body material (molded body material) supplied in an air flow into the accumulation recess 2 of the rotary drum 1.
  • the exhaust device connected to each of the space A in the rotary drum 1, the space D in the transfer roll 12, and the vacuum box 13 is operated to make negative pressure.
  • an air flow vacuum air
  • the rotary drum 1 and the transfer roll 12 are rotated, and a vacuum conveyor (not shown) disposed below the transfer roll 12 is operated.
  • the absorbent material 94 is sucked into the accumulation recess 2 of the rotary drum 1 as shown in FIG.
  • FIG. 7 not only the opening 65 of the bottom surface corresponding part 6A of the concave portion of the molding member 6 that is sucked from the bottom surface 2A, but also the concave portion that is not sucked from the bottom surface 2A.
  • Absorber raw material 94 is piled up also in the partition part 60 (linear members 61 and 62).
  • the absorbent material is spread only in the opening 65 on the upstream side of the duct 11, and when the height of the stacked absorbent material reaches the thickness of the recessed section 60 (linear members 61, 62), In accordance with the entanglement between the absorbent raw materials and the flow of air in the duct 11 that conveys the absorbent raw materials, the absorbent raw materials start to pile on the concave section 60 (linear members 61 and 62). On the downstream side of the duct 11, the accumulation recess 2 is completely covered with the absorbent material.
  • the rotary drum 1 is further rotated.
  • the pile 95 in the accumulation recess 2 comes to a position opposite to the vacuum box 13
  • the pile 95 is sucked by the mesh belt 14 by suction from the vacuum box 13.
  • the transfer roll 12 And the rotating drum 1 are conveyed to the closest part or the vicinity thereof.
  • the pile 95 in the state of being sucked onto the mesh belt 14 is released from the accumulation recess 2 by suction from the transfer roll 12 side and transferred onto the transfer roll 12 together with the mesh belt 14.
  • the release of the piled article 95 from the accumulation recess 2 and the transfer onto the transfer roll 12 are smoothly performed without any problems due to the operational effects resulting from the specific configuration of the rotary drum 1 described above.
  • FIG. 8 shows a part of the pile 95 just after being released from the accumulation recess 2.
  • the portion corresponding to the opening 65 of the recess bottom surface corresponding portion 6A of the molded member 6 has a thick portion (high-tsubo) with a relatively large amount of absorbent raw material.
  • the portion corresponding to the recessed section 60 (linear members 61, 62) of the recessed portion bottom corresponding portion 6A is a thin portion (low basis weight portion) 95B having a relatively small amount of absorbent material. It has become.
  • one surface 95a of the piled article 95 is substantially flat, while the other surface 95b is an uneven surface having a large undulation.
  • a plurality of continuous straight concave portions (groove portions, thin portions 95B) in plan view extending in the drum width direction X and a direction orthogonal to the drum width direction X (direction corresponding to the drum circumferential direction) are arranged in a lattice shape on the uneven surface 95b.
  • convex portions (thickness portions 95A) having a rectangular shape in plan view are arranged at the mesh portions of the lattice.
  • the piled product 95 transferred onto the transfer roll 12 is conveyed while receiving suction from the transfer roll 12 side, and is introduced onto a tissue paper or a transparent paper introduced on a vacuum conveyor (not shown) disposed below the transfer roll 12. It is delivered onto a core wrap sheet 96 made of a liquid nonwoven fabric or the like. Thereafter, both side portions along the conveyance direction of the core wrap sheet 96 are folded back, and the upper and lower surfaces of the piled-up material 95 are covered with the core wrap sheet 96. Then, the pile 95 in a state covered with the core wrap sheet 96 is compressed in a thickness direction by a compression means (not shown) such as a press roll, if necessary, and then cut into a predetermined size by a cutter.
  • a compression means such as a press roll
  • the thick portion (high basis weight portion) 95A is a high density portion having a relatively high density
  • the thin portion (low basis weight portion) 95B is a relative portion. Therefore, the low density part is low in density.
  • the absorbent body of the present invention is suitable as a constituent member of absorbent articles such as disposable diapers and sanitary napkins.
  • an absorbent article using the absorbent body of the present invention there may be mentioned an article comprising the absorbent body and a sheet material for fixing the absorbent body.
  • This sheet material may be disposed only on one surface (skin facing surface or non-skin facing surface) side of the absorbent body, or may be disposed on both surface sides of the absorbent body.
  • a liquid-permeable surface sheet is used as the sheet material disposed on the skin-facing surface side of the absorber
  • a liquid-impermeable or repellent material is used as the sheet material disposed on the non-skin-facing surface side of the absorber.
  • the skin-facing surface is a surface of the absorbent article or a component thereof (for example, an absorbent body) that is directed to the wearer's skin when the absorbent article is worn, and the non-skin facing surface is the absorbent article or its It is a surface which is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn in the constituent member.
  • the process to comprise is comprised.
  • the absorber and the sheet material can be fixed by a known fixing means such as a hot melt adhesive or heat fusion. Further, the fixing between the absorbent body and the sheet material includes sandwiching the absorbent body between at least two sheet materials without being directly joined to the sheet material.
  • the stacking recess 2 is continuously formed on the outer peripheral surface of the rotating drum 1 over the entire length in the circumferential direction, but may be intermittently formed in the circumferential direction.
  • the outermost surface between two stacking recesses 2 and 2 adjacent to each other in the circumferential direction may be formed of a non-breathable ring member 5 so that the molding material is not deposited between the recesses 2 and 2. it can.
  • each member 4,6,5 fixed to the drum main body 3 has the length which each divided
  • the concave section 60 may be composed of a single annular member, or may be composed of a combination of three or more.
  • the “linear” in the linear members 61 and 62 constituting the concave section 60 is not limited to the straight shape as in the above-described embodiment in the plan view of the stacking concave section 2 and includes a curve and a folding line.
  • molding member 6 was uniform in the whole region of the drum circumferential direction, as shown in FIG. It may change in the drum circumferential direction R.
  • the opening member 4 bottom surface 2A
  • the opening member 4 has a concavo-convex shape corresponding to the thickness change of the concave section 60 in the drum circumferential direction R.
  • the molded member 6 has a single-layer structure, but may have a multilayer structure in which a plurality of relatively thin molded members are stacked.
  • the molded member 6 has such a multilayer structure, processing becomes easier than in the case of a single-layer structure, and molded bodies having various shapes can be manufactured.
  • the ring member 5 may not be disposed outside the outer molded member 6.
  • the entire area of the concave section corresponding portion 40 of the aperture member 4 is the non-breathable section 45, but the concave section corresponding section 40 is joined to the molding member 6.
  • a vent hole may be formed in a part of the concave section corresponding part 40.
  • 60% or more is preferable and, as for the area ratio which occupies for the recessed part division part corresponding
  • FIG. 5B when the hole member 4 and the molded member 6 are joined in the non-breathable portion 45, the concave partition portion corresponding portion 40 of the non-breathable portion 45 is formed.
  • the area ratio occupied is preferably 30% or more, and more preferably 50% or more.
  • a fiber stacking apparatus that includes a rotating drum having an accumulation concave portion on an outer peripheral surface, and the rotating drum forms a molded product by sucking the molded body material by suction on the bottom surface of the accumulation concave portion,
  • the rotating drum includes a drum body and a breathable aperture member that forms a bottom surface of the concave portion for accumulation,
  • a forming member having a non-breathable recessed section partitioning the collecting recessed section into a plurality of regions in the circumferential direction and the width direction of the rotating drum is superimposed on the opening member on the bottom surface of the collecting recessed section.
  • the fiber opening device in which the opening member has a non-breathable portion in a portion corresponding to the recessed section.
  • ⁇ 3> The fiber stacking apparatus according to ⁇ 1> or ⁇ 2>, wherein the concave section section includes a linear member extending along a bottom surface of the stacking concave section.
  • ⁇ 4> The fiber stacking device according to ⁇ 3>, wherein the linear member and the non-breathable portion that overlaps the linear member in a plan view of the accumulation recess have different widths.
  • ⁇ 5> The fiber pile device according to ⁇ 4>, wherein a width of the linear member is larger than a width of the air-impermeable portion that overlaps the linear member in a plan view of the concave portion for accumulation.
  • ⁇ 6> The fiber pile device according to ⁇ 4>, wherein a width of the linear member is smaller than a width of the air-impermeable portion that overlaps the linear member in a plan view of the concave portion for accumulation.
  • ⁇ 7> The fiber stacking apparatus according to ⁇ 3>, wherein the linear member and the non-breathable portion that overlaps the linear member in plan view of the concave portion for accumulation have the same width.
  • the ratio (W1 / W2) of the width W1 of the linear member to the width W2 of the air-impermeable portion that overlaps the linear member in plan view of the concave portion for accumulation is 0.1 to 1
  • the fiber stacking apparatus according to any one of ⁇ 3> to ⁇ 7>, particularly 0.4 to 0.8.
  • the concave section is orthogonal to the plurality of widthwise linear members extending in the width direction of the rotating drum in a straight line in plan view and the plurality of widthwise linear members as the linear members.
  • the non-breathable portion includes a plurality of continuous straight widthwise non-breathable portions corresponding to the plurality of widthwise linear members on a one-to-one basis, and the plurality of circumferential lines.
  • the fiber stacking device including a plurality of continuous straight circumferential air-impermeable portions corresponding one-to-one to the shaped member and having a lattice shape in plan view.
  • the fiber stacking apparatus according to any one of ⁇ 3> to ⁇ 10>, wherein the linear member has a width of 1 to 10 mm.
  • the non-breathable portion is formed by joining another non-breathable member to a portion where the vent hole is formed in the aperture member, or the vent hole in the aperture member is formed.
  • the fiber stacking device according to any one of ⁇ 1> to ⁇ 11>, wherein the fiber stacking device is formed of a portion that is not formed.
  • ⁇ 14> The fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 13>, wherein the entire region of the portion corresponding to the concave section of the aperture member is the air-impermeable portion.
  • the portion of the aperture member corresponding to the recessed section is only part of the non-breathable portion, and the entire portion is more vented than the portion other than the portion of the aperture member.
  • the fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 13> which has low air permeability and low air permeability.
  • the portion corresponding to the recess partition portion in the opening member (the recess partition portion corresponding portion) is not joined to the molded member, and a ventilation hole is formed in a part of the portion,
  • the fiber stacking device according to any one of ⁇ 1> to ⁇ 13>, wherein an area ratio of the non-breathable portion to the portion is 60% or more, particularly 80% or more.
  • the fiber stacking device according to any one of ⁇ 1> to ⁇ 15>, wherein the air-impermeable portion is formed by joining the aperture member and the molded member.
  • the non-breathable portion includes a welded portion of the aperture member and the molded member or a joint portion by an adhesive, and the vent hole originally formed in the aperture member at the joint portion is the weld or
  • the fiber stacking device according to ⁇ 17>, wherein the fiber stacking device is closed with the adhesive.
  • the ratio of the area of the air-impermeable portion to the portion corresponding to the recessed portion partitioning portion (the recessed portion partitioning portion corresponding portion) in the aperture member is 30% or more, particularly 50% or more. Or the fiber pile apparatus of ⁇ 18> description.
  • ⁇ 20> The imaginary outer surface formed by the outer side of the molding member is flat, and the concave section is flat on the outer surface in the width direction and the circumferential direction of the rotary drum.
  • ⁇ 21> The fiber stacking device according to any one of ⁇ 1> to ⁇ 20>, wherein the air-impermeable portion and the recessed portion partitioning portion are similar or congruent in shape in plan view.
  • a plurality of the air-impermeable portions are formed at a predetermined interval in a portion corresponding to the recessed portion partitioning portion (the recessed portion partitioning portion corresponding portion) of the aperture member, and the width direction of the rotating drum
  • the fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 21>, wherein the fiber stacking apparatus is discontinuously formed in both directions in a circumferential direction orthogonal thereto.
  • the thickness of the concave section changes in the entire area in the circumferential direction of the rotary drum, and the opening member (the bottom surface of the opening member) changes in the circumferential thickness of the concave section.
  • the fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 22>, wherein the fiber stacking apparatus has a concavo-convex shape corresponding to.
  • the fiber stacking device includes a duct that supplies a molding material to the outer peripheral surface of the rotating drum, a transfer roll that is disposed obliquely below the rotating drum and is driven to rotate, and a lower portion of the transfer roll.
  • the fiber stacking apparatus according to any one of the above items ⁇ 1> to ⁇ 23>, further comprising a vacuum conveyor.
  • the aperture member is a metal or resin mesh, or a porous metal plate or resin plate in which a large number of pores are formed by etching or punching on a metal or resin plate, and the aperture member
  • the fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 24>, wherein air holes having a diameter of 0.2 to 0.6 mm are formed at a pitch of 0.4 to 1.5 mm.
  • the rotating drum includes a ring member that forms an inner surface of the accumulation recess, and the ring member is disposed on both sides in the width direction of the outer peripheral surface of the rotation drum with the accumulation recess interposed therebetween.
  • the fiber stacking apparatus according to any one of the above ⁇ 1> to ⁇ 25>.
  • ⁇ 27> The fiber stacking apparatus according to ⁇ 26>, wherein both side portions of the forming member have inner end surfaces along a circumferential direction of the rotating drum forming an inner side surface of the concave portion for accumulation together with the ring member.
  • the molding member has a plurality of openings located in the plurality of regions partitioned by the recess partitioning portion and penetrating the molding member in a thickness direction, and the plurality of the opening portions are the recesses.
  • the fiber stacking apparatus according to any one of ⁇ 1> to ⁇ 27>, wherein the fiber stacking apparatus is separated by a partition unit and is independent of each other.
  • ⁇ 29> The fiber stacking apparatus according to ⁇ 28>, wherein the area of one opening is 100 cm 2 or less, particularly 35 cm 2 or less.
  • the number of the opening portions is one or more, particularly three or more per unit area of 100 cm 2 of the bottom surface of the concave portion for accumulation.
  • ⁇ 31> A method for producing an absorbent body using the fiber stacking device according to any one of ⁇ 1> to ⁇ 27>, The manufacturing method of an absorber which comprises the fiber-splitting process which attracts
  • ⁇ 32> A method for producing an absorbent body using the fiber stacking device according to any one of ⁇ 28> to ⁇ 30>, The manufacturing method of an absorber which comprises the fiber-splitting process which attracts
  • the stacked fiber formed in the stacking recesses and released from the stacking recesses by the stacking step corresponds to the bottom surface of the recess in the molding member that overlaps the bottom surface of the stacking recesses in plan view.
  • the portion corresponding to the opening of the portion is a thick portion having a relatively large amount of absorbent raw material, and the portion corresponding to the concave section of the concave bottom surface corresponding portion is relatively of the absorbent raw material.
  • the core is formed by covering the stacked fiber formed by the stacking recesses and released from the stacking recesses with a core wrap sheet in the stacking step, and cutting the cores into a predetermined size with a cutter.
  • a method for producing an absorbent article comprising an absorbent body and a sheet material for fixing the absorbent body, A method for producing an absorbent article comprising a step of fixing an absorbent body obtained by carrying out the production method according to any one of ⁇ 31> to ⁇ 34> to the sheet material.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (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)
  • Nonwoven Fabrics (AREA)

Abstract

Selon l'invention, le tambour rotatif (1) d'un dispositif d'empilement de fibres (10) comprend un élément d'intégration concave (2) sur la surface de la circonférence externe, ainsi qu'un corps principal de tambour (3) et un élément d'ouverture perméable à l'air (4) formant la surface inférieure (2A) de l'élément d'intégration concave (2). Un élément de formation (6) comprenant une partie de séparation concave imperméable à l'air (60) permettant de séparer l'élément d'intégration concave (2) en de multiples régions dans la direction de la largeur (X) et la direction de la circonférence du tambour rotatif (1), est formé sur la surface inférieure (2A) de l'élément d'intégration concave de sorte à chevaucher l'élément d'ouverture (4). L'élément d'ouverture (4) comprend une partie imperméable à l'air (45) sur une section (40) correspondant à la partie de séparation concave (60).
PCT/JP2012/076510 2011-10-21 2012-10-12 Dispositif d'empilement de fibres WO2013058196A1 (fr)

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JP2011-231326 2011-10-21
JP2011231326A JP5261557B2 (ja) 2011-10-21 2011-10-21 積繊装置

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US10231883B2 (en) 2015-01-23 2019-03-19 Kimberly-Clark Worldwide, Inc. Bridged absorbent structure

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Publication number Priority date Publication date Assignee Title
WO2013058195A1 (fr) 2011-10-19 2013-04-25 花王株式会社 Dispositif d'empilement de fibres

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JP2006141615A (ja) * 2004-11-18 2006-06-08 Uni Charm Corp 吸液性芯材成型ドラム
WO2011068062A1 (fr) * 2009-12-04 2011-06-09 花王株式会社 Procédé et dispositif de fabrication de corps d'absorption
JP2011200568A (ja) * 2010-03-26 2011-10-13 Unicharm Corp 吸収体の製造装置

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AU590032B2 (en) * 1985-12-10 1989-10-26 Kimberly-Clark Worldwide, Inc. Controlled formation of light and heavy fluff zones
US6330735B1 (en) * 2001-02-16 2001-12-18 Kimberly-Clark Worldwide, Inc. Apparatus and process for forming a laid fibrous web with enhanced basis weight capability
JP4499792B2 (ja) * 2005-09-29 2010-07-07 大王製紙株式会社 吸収体の積繊装置、及びこれを用いた吸収体の製造方法

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JP2006141615A (ja) * 2004-11-18 2006-06-08 Uni Charm Corp 吸液性芯材成型ドラム
WO2011068062A1 (fr) * 2009-12-04 2011-06-09 花王株式会社 Procédé et dispositif de fabrication de corps d'absorption
JP2011200568A (ja) * 2010-03-26 2011-10-13 Unicharm Corp 吸収体の製造装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10231883B2 (en) 2015-01-23 2019-03-19 Kimberly-Clark Worldwide, Inc. Bridged absorbent structure

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CN103874473B (zh) 2015-06-17
JP5261557B2 (ja) 2013-08-14
JP2013085856A (ja) 2013-05-13
CN103874473A (zh) 2014-06-18

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