WO2013058196A1

WO2013058196A1 - Fiber stacking device

Info

Publication number: WO2013058196A1
Application number: PCT/JP2012/076510
Authority: WO
Inventors: 松永　竜二; 浩志丸山; 知之茂木
Original assignee: 花王株式会社
Priority date: 2011-10-21
Filing date: 2012-10-12
Publication date: 2013-04-25
Also published as: JP5261557B2; JP2013085856A; CN103874473A; CN103874473B

Abstract

The rotating drum (1) of a fiber stacking device (10) has an integration concave (2) on the outer circumference surface, and is provided with a drum main body (3) and an air-permeable opening member (4) forming the bottom surface (2A) of the integration concave (2). A forming member (6) having a non-air-permeable concave separating part (60) for separating the integration concave (2) into multiple regions in the width direction (X) and the circumferential direction of the rotating drum (1) is formed on the bottom surface (2A) of the integration concave so as to overlap with the opening member (4). The opening member (4) has a non-air-permeable part (45) on a section (40) corresponding to the concave separating part (60).

Description

Fiber stacking equipment

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.

As an apparatus for manufacturing absorbent bodies used for sanitary goods (absorbent articles) such as disposable diapers and sanitary napkins, 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. 2. Description of the Related Art There is known a fiber stacking device that releases from an accumulation concave portion by suction from suction means arranged to face each other and transfers onto a suction means.

Regarding the rotary drum of the fiber stacking apparatus having the above-described configuration, for example, 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.

Further, in 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. According to Patent Document 2, by using the rotating drum having such a configuration, 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. .

WO2009119859 A1 JP 2006-141615 A

In the fiber stacking apparatus having the above-described configuration, 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. When the mold is released from the accumulation recess and transferred onto the suction means, 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. There was a risk of poor transfer of the piled material. 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.

Moreover, 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.

According to 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, and 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. 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 | molding member which concerns on the other embodiment of this invention, FIG.9 (b) is a shaping | molding member shown in Fig.9 (a). It is sectional drawing which shows typically the cross section along the drum circumferential direction of the form used in combination with the aperture member.

[Technical Field] 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.

Hereinafter, the fiber stacking apparatus of the present invention will be described based on a preferred embodiment thereof with reference to the drawings. FIG. 1 shows a fiber stacking apparatus 10 which is an embodiment of the fiber stacking apparatus of the present invention, and 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.

As shown in FIG. 1, the fiber stacking device 10 includes a rotating drum 1 that is rotationally driven in the direction of arrow R 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.

In the fiber stacking device 10, 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.

Hereinafter, the rotating drum 1 which is a main feature of the fiber stacking apparatus 10 will be described. As shown in FIGS. 2 to 4, 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 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. Here, “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. 3) through holes 32 penetrating the concave bottom surface corresponding part 31 in the thickness direction, and two adjacent through

holes

32 and 32. 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. Although 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. For example, 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. Examples of the non-breathable material include stainless steel, iron, aluminum, and a polymer material. Examples of the non-breathable material include a material in which micropores are formed in a member made of the non-breathable material. Can be mentioned. As 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. As the porous metal plate or resin plate forming the aperture member 4, for example, 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.

As shown in FIGS. 2 to 4, the rotary drum 1 of this embodiment further includes a ring member 5 that forms an inner surface 2 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 (the interval between the pair of left and right ring members) is the width of the accumulation recess 2. In addition, 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.

On the bottom surface 2 A of the stacking recess 2, 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 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. And has an opening 65 through which air passes, so that the entire recess bottom face corresponding portion 6A has air permeability. As shown in FIG. 3, 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. As a material for forming the non-breathable portion (concave portion 60) of the molded member 6, metals such as stainless steel, aluminum, and iron, resins, and the like can be used.

Here, “non-breathability” of the recessed section 60 (

linear members

61 and 62 described later) means that the vacuum air generated from the inside of the drum does not easily pass through the member (the recessed section 60). In addition, not only when vacuum air is not allowed to pass through (when there is no air permeability), but it has low air permeability, but 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). Unless otherwise specified, the above description applies to “non-breathability” described in this specification. For example, 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). Here, “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. More specifically, as shown in FIG. 3, 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. In this embodiment, 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.

In the present embodiment, the portion excluding the concave bottom surface corresponding portion 6 A in the molding member 6, that is, both side portions 6 B in the drum width direction X of the molding member 6 overlap the ring member 5 in a plan view of the outer peripheral surface of the rotary drum 1. 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. As shown in FIG. 3, the both end portions 6 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.

As one of the main features of the rotating drum 1 of the present embodiment, as shown in FIG. 4, 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. Here, “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. In the present embodiment, since 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. That is, even if the difficulty or non-breathable material of the aperture member 4 exists in the same structure as the other portions of the aperture member 4 other than the recess partition portion corresponding portion 40 with respect to the recess partition portion corresponding portion 40. It is different from the non-breathable part 45.

FIG. 5 shows a specific example of the non-breathable portion 45. In the form shown in FIG. 5A, 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. And the site | parts other than the recessed part division part corresponding | 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. A plurality of (four) planes corresponding in a one-to-one manner to a plurality of (four in the present embodiment) circumferential linear members 62 that form the concave width direction air-impermeable portion 45A and the concave 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. Here, “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. In the present embodiment, 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 When 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.

Further, 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)]. As this joining method, 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. 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. In the form shown in FIG. 5B, 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.

As described above, as shown in FIG. 5 (a), 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. Thus, 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. In the form shown in FIG. 5 (b), 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.

Thus, in this embodiment, 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). As a result, the above-mentioned transfer failure and loss of shape of the piled article can be effectively prevented. The operation and effect of this embodiment will be described with reference to FIG. 6. As shown in the left side of FIG. 6B, 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. When 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.

Such an inconvenience is more likely to occur as the number of regions (openings 65) partitioned by the recessed partitioning portion 60 increases and the area of each region (opening 65) decreases. In particular, as in the present embodiment, 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 When the portions 65 are separated by the recessed section 60 and are independent from each other, the vacuum air is likely to be turbulent, and the portions corresponding to the openings 65 in the resulting piled fabric (see FIG. 8). Since the thick portion 95 A) in the piled-up product 95 shown is relatively small, transfer failure and shape loss are likely to occur. In particular, 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.

On the other hand, in this embodiment, as shown in the diagram on the left side of FIG. 6A, it is located leeward than the non-breathable recessed section 60 (linear members 61, 62) with respect to the vacuum air. Since 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. As a result, when 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). Therefore, according to the rotating drum 1 of the present embodiment, 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.

Further, eliminating the gap between the recessed section 60 of the molded member 6 and the aperture member 4 (the recessed section section corresponding portion 40) is effective in terms of preventing transfer failure and loss of shape of the piled article, From this point of view, 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. If 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. In this embodiment, 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. It is constant without changing in the depth direction), but may be changed in the thickness direction, for example, gradually increasing or decreasing toward the aperture member 4. In this case, 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).

According to the knowledge of the present inventors, when the width W1 of the

linear members

61 and 62 and the width W2 of the air-impermeable portion 45 are the same (when W1 = W2), the above-mentioned clogging prevention property, pile transfer When the width W2 was larger than the width W1 (when W1 <W2), the properties and the shape loss prevention property were the standards, both the clogging prevention property and the pile transfer property were above the above criteria. In addition, when the width W1 was larger than the width W2 (when W1> W2), the shape loss prevention property was equal to or higher than the above standard. Therefore, it is preferable to appropriately determine the magnitude relationship between the widths W1 and W2 in consideration of the importance of these three characteristics.

In consideration of the importance of clogging prevention and fiber transferability, 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. In that case, 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). In the present embodiment, 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.

In the fiber stacking apparatus 10, 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. On the other hand, on the other end of the rotating drum 1 in the drum width direction X, 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. By this 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 (suction means) (not shown) 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.

The fiber stacking apparatus 10 will be further described. As shown in FIG. 1, 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. In the non-rotating portion on the inner side (rotating shaft side) of the transfer roll 12, a space D in which the inside can be decompressed is formed. A known exhaust device (not shown) 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. On the outer peripheral surface of the transfer roll 12, a large number of suction holes that communicate with the inside and the outside are formed. While these suction holes pass over the space D maintained at a negative pressure, air is sucked into the interior from the outside, and the piled articles (molded body) in the accumulation recess 2 are caused by the suction force. The transition from the rotating drum 1 to the transfer roll 12 is smooth.

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. As shown in FIG. 1, 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.

Next, an embodiment of a method for continuously producing an absorbent body using the fiber stacking apparatus 10 described above, that is, an embodiment of a method for producing the absorbent body of the present invention will be described. 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.

Prior to performing the fiber stacking step, first, 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. By making the pressure in the space A negative, an air flow (vacuum air) is generated in the duct 11 to convey the absorbent material to the outer peripheral surface of the rotary drum 1. Further, 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.

When the fiber material introducing device is operated to supply the absorbent material into the duct 11, the absorbent material rides on the air flow flowing through the duct 11, becomes a scattered state, and the outer peripheral surface of the rotary drum 1. Supplied towards

While the portion covered with the duct 11 is being conveyed, the absorbent material 94 is sucked into the accumulation recess 2 of the rotary drum 1 as shown in FIG. In this embodiment, as shown in 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.

In this way, after the absorbent material 94 is stacked in the accumulation recess 2 to obtain the stacked product 95, the rotary drum 1 is further rotated. When 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. In this state, the transfer roll 12 And the rotating drum 1 are conveyed to the closest part or the vicinity thereof. Then, 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. 8, 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. In addition, 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. In addition, 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. Thus, an absorbent body made of a molded body covered with the core wrap sheet 96 is obtained. When the pile 95 is compressed in the thickness direction, the thick portion (high basis weight portion) 95A is a high density portion having a relatively high density, and 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. As an example of 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. In the latter case, a liquid-permeable surface sheet is used as the sheet material disposed on the skin-facing surface side of the absorber, and a liquid-impermeable or repellent material is used as the sheet material disposed on the non-skin-facing surface side of the absorber. An aqueous back sheet can be used. 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 manufacturing method of the absorbent article which comprises the absorber of this invention and the sheet material which fixes this fixes the absorber obtained by implementation of the manufacturing method mentioned above to this sheet material (surface sheet, back sheet, etc.). 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 present invention is not limited to the above embodiment and can be modified as appropriate. For example, in the above embodiment, 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. In this case, 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. Moreover, in the said embodiment, each

member

4,6,5 fixed to the drum main body 3 has the length which each divided | segmented the circumference of the rotating drum 1 into the substantially equal half, and combined two for each member. However, it may be composed of a single annular member, or may be composed of a combination of three or more. In addition, 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.

Moreover, in the said embodiment, although the thickness of the recessed part division part 60 (linear members 61 and 62) of the shaping | 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. In that case, as shown in FIG. 9B, the opening member 4 (bottom surface 2A) has a concavo-convex shape corresponding to the thickness change of the concave section 60 in the drum circumferential direction R. Such a concavo-convex shape Where the non-breathable portion 45 needs to be formed in the aperture member 4 (concave portion corresponding portion 40) having the above, according to the welding (welding) between the aperture member 4 and the molded member 6 described above, The air-impermeable portion 45 can be reliably formed without creating a gap between the

members

4 and 6. As described above, the formation of the non-breathable portion 45 by welding (welding) between the aperture member 4 and the molded member 6 has an advantage that the thickness of the molded member 6 can be changed and the application range is wide. Yes.

In the above embodiment, 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. When 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. Further, the ring member 5 may not be disposed outside the outer molded member 6.

In the form shown in FIG. 5 (a), 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. Instead, a vent hole may be formed in a part of the concave section corresponding part 40. In that case, 60% or more is preferable and, as for the area ratio which occupies for the recessed part division part corresponding | compatible part 40 of the air-impermeable part 45, 80% or more is still more preferable. Further, as shown in 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.

The following additional notes (a fiber stacking apparatus, an absorbent body manufacturing method, and an absorbent article manufacturing method) are further disclosed in relation to the above-described embodiments of the present invention.

<1> 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. Are arranged,
The fiber opening device in which the opening member has a non-breathable portion in a portion corresponding to the recessed section.

<2> The fiber stacking apparatus according to <1>, wherein the concave section and the air-impermeable section have the same shape in plan view of the concave section for accumulation.

<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.
<8> 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.

<9> 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 product according to any one of <3> to <8>, including a plurality of linear members in a circumferential direction in a plan view and formed in a lattice shape in plan view by the linear members. Textile equipment.
<10> 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 according to <9>, 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.
<11> The fiber stacking apparatus according to any one of <3> to <10>, wherein the linear member has a width of 1 to 10 mm.

<12> 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.
<13> The fiber stacking apparatus according to <12>, wherein the non-breathable separate member is metal, resin, or silicone.

<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.
<15> 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.
<16> 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.

<17> 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.
<18> 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.
<19> 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. > The fiber stacking apparatus according to any one of the above.
<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.
<22> 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 And 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.
<23> 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.

<24> 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.
<25> 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.
<26> 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.

<28> 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.
<30> The fiber stacking apparatus according to <29> or <30>, wherein 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 | sucks and absorbs the absorber raw material supplied on the airflow to the recessed part for accumulation | storage of the said rotating drum.
<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 | sucks and absorbs the absorber raw material supplied on the airflow to the recessed part for accumulation | storage of the said rotating drum.

<33> 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 method for producing an absorbent body according to the above <32>, wherein the amount of accumulated fibers is a thin portion, and one surface of the accumulated product is flat and the other surface is an uneven surface.
<34> 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. The method for producing an absorbent body according to any one of <31> to <33>, wherein an absorbent body comprising a molded body covered with a wrap sheet is obtained.

<35> 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.

Claims

A stacking apparatus comprising a rotating drum having a stacking recess on an outer peripheral surface, wherein the rotating drum stacks the formed 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 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. Are arranged,
The fiber opening device in which the opening member has a non-breathable portion in a portion corresponding to the recessed section.
The fiber stacking apparatus according to claim 1, wherein the concave section and the non-breathable section have the same shape in plan view of the stacking concave section.
The fiber stacking apparatus according to claim 1 or 2, wherein the concave section section includes a linear member extending along the bottom surface of the stacking concave section.
4. The fiber stacking apparatus according to claim 3, wherein the linear member and the non-breathable portion overlapping the linear member in a plan view of the accumulation concave portion have different widths.
The fiber stacking apparatus according to claim 4, wherein a width of the linear member is larger than a width of the air-impermeable portion overlapping the linear member in a plan view of the accumulation recess.
The fiber stacking apparatus according to claim 4, wherein a width of the linear member is smaller than a width of the non-breathable portion overlapping the linear member in a plan view of the concave portion for accumulation.
The concave section includes, as the linear member, a plurality of linear members in a plan view extending in the width direction of the rotating drum, and a straight line in a plan view orthogonal to the plurality of linear members in the width direction. The fiber stacking device according to any one of claims 3 to 6, wherein the fiber stacking device is formed in a lattice shape in plan view by the linear members.
The non-breathable portion includes a plurality of continuous linear widthwise non-breathable portions corresponding to the plurality of widthwise linear members on a one-to-one basis, and a plurality of circumferential linear members. The fiber stacking apparatus according to claim 7, comprising a plurality of continuous straight circumferentially non-breathable portions corresponding in a one-to-one correspondence in a plan view and having a lattice shape in a plan view.
The non-breathable part is formed by joining another non-breathable member to a portion where the vent hole is formed in the aperture member, or a portion where the vent hole is not formed in the aperture member. The fiber stacking apparatus according to any one of claims 1 to 8, comprising:
The fiber stacking device according to any one of claims 1 to 9, wherein an entire area of a portion corresponding to the concave section of the aperture member is the air-impermeable portion.
Only a part of the portion corresponding to the recessed section of the aperture member is the non-breathable portion, and the entire portion has a lower air permeability than portions other than the portion of the aperture member. The fiber stacking device according to any one of claims 1 to 9, which has weak air permeability.
The fiber stacking device according to any one of claims 1 to 11, wherein the air-impermeable portion is formed by joining the aperture member and the molded member.
The molding member has a plurality of openings located in the plurality of regions partitioned by the recess partitioning portions and penetrating the molding member in the thickness direction, and the plurality of openings are formed by the recess partitioning portions. The fiber stacking device according to any one of claims 1 to 12, which is separated and individually independent.
A method for producing an absorbent body using the fiber stacking device according to any one of claims 1 to 13,
The manufacturing method of an absorber which comprises the fiber-splitting process which attracts | sucks and absorbs the absorber raw material supplied on the airflow to the recessed part for accumulation | storage of the said rotating drum.
A method for producing an absorbent article comprising an absorbent body and a sheet material for fixing the absorbent body,
The manufacturing method of an absorbent article which comprises the process of fixing the absorber obtained by implementation of the manufacturing method of Claim 14 to the said sheet | seat material.