JP2019063372A - Manufacturing method of absorber - Google Patents

Abstract

To provide a method for manufacturing an absorber having sheet pieces containing synthetic fibers for inhibiting the deformation of the accumulation body contained in the absorber.SOLUTION: A manufacturing method includes: accumulation process for accumulating a plurality of sheet pieces 10bh containing synthetic fiber 10b and a hydrophilic fiber 10a to a recess part 41 for accumulation to form an accumulation body 100a; and a coating process for placing the accumulation body 100a on one surface of a core wrap sheet 100b to be transported, folding both sides of the core wrap sheet 100b along the transportation direction thereof, and covering both sides of the accumulation body 100a along the transportation direction. In the accumulation process, an accumulation body 100a having a first layer 100a1 and a second layer 100a2 laminated therein in a thickness direction is formed, the second layer having smaller density of the sheet piece 10bh than that of the first layer 100a1, and in the coating process, both sides bR and bL along the transportation direction of the core wrap sheet 100b are folded so as to come in contact with the surface of the second layer 100a2 of the accumulation body 100a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of producing an absorber.

  As an absorber used for absorbent articles, such as a disposable diaper, a sanitary napkin, and an incontinence pad, an absorber including, for example, pulp fibers and synthetic fibers is known. As a method for producing an absorbent containing pulp fibers and synthetic fibers, for example, Patent Document 1 is known.

  Patent Document 1 describes an absorbent article in which a non-woven fabric having a three-dimensional structure in which fibers are bonded in advance is formed, and then the non-woven fabric is crushed to form non-woven fabric pieces, and the non-woven fabric pieces are mixed with hydrophilic fibers. A method of making the absorber is described. In addition, Patent Document 1 describes that a cutter mill method is adopted as a means for crushing a non-woven fabric, and non-woven fabric pieces having an average size of 3 to 25 mm are formed.

  Also, as another technique, the present applicant previously placed an aggregate formed using a stacking drum on a band-like core wrap sheet being transported, and then, the aggregate A method of manufacturing an absorbent body is proposed, including the step of folding the portion of the band-shaped core wrap sheet extending from the side edges of the sheet to the side of the stack and covering the stack with the core wrap sheet.

JP 2002-301105 A JP 2008-206539 A

  As in the method of manufacturing an absorbent body described in Patent Document 1, a portion of the core wrap sheet extending from both side edge portions of an accumulation body in which non-woven fabric pieces having a certain size are mixed is folded back to the accumulation body side The core wrap sheet is slippery due to the presence of relatively large non-woven fabric pieces present on the surface of the aggregate during coating, and the aggregate is not easily covered, and the aggregate tends to lose its shape. It turned out that it becomes difficult to shape | mold in the target shape. In addition, Patent Document 2 does not describe or suggest anything about an aggregate in which non-woven fabric pieces are mixed.

  In view of the above-mentioned circumstances, the present invention is to provide a method of manufacturing an absorbent body in which the shape collapse of the aggregate of the absorbent body is suppressed in the method of manufacturing an absorbent body containing sheet pieces containing synthetic fibers.

  In the present invention, an accumulation step of accumulating a plurality of sheet pieces containing synthetic fibers and a hydrophilic fiber in an accumulation portion to form an accumulation body, and mounting the accumulation body on one surface of a belt-like covering sheet to be conveyed And d) covering the both sides along the transport direction of the covering sheet and covering at least both sides along the transport direction of the stack, and manufacturing the absorbent body, Forming the aggregate in which the first layer to which the sheet piece and the hydrophilic fiber are mixed and the second layer having a smaller density of the sheet pieces than the first layer are laminated in the thickness direction, The manufacturing method of the absorber which folds the said both sides of the said coating sheet so that it may contact | connect the surface of the said 2nd layer of the said accumulation body in a coating process is provided.

  ADVANTAGE OF THE INVENTION According to this invention, in the manufacturing method of the absorber containing the sheet piece containing a synthetic fiber, a form collapse of the aggregate | assembly which this absorber has can be suppressed.

FIG. 1 is a cross-sectional view showing a preferred embodiment of an absorbent body produced by the method for producing an absorbent body of the present invention. FIG. 2 is a schematic perspective view showing a preferred embodiment of a manufacturing apparatus for manufacturing the absorber shown in FIG. FIG. 3 is a schematic side view of the manufacturing apparatus shown in FIG. 2 as viewed from the side. FIG. 4 is an enlarged side view of a supply unit provided in the manufacturing apparatus shown in FIG. FIG. 5 is a cross-sectional view showing another embodiment of the absorbent manufactured by the method of manufacturing the absorbent according to the present invention. FIG. 6 is a cross-sectional view showing another embodiment of an absorbent body manufactured by the method for manufacturing an absorbent body of the present invention. FIG. 7 is a schematic side view of the other embodiment of the manufacturing apparatus shown in FIG. 2 as viewed from the side.

  Hereinafter, the present invention will be described based on its preferred embodiments with reference to the drawings. The production method of the present invention is a method for producing an absorbent containing synthetic fibers. The absorbent produced in the present invention is preferably used as an absorbent for an absorbent article. An absorbent article is mainly used to absorb and hold body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, but are not limited to, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., and widely include articles used for absorbing fluid discharged from the human body. Do. The absorbent article typically comprises a liquid-permeable top sheet, a liquid-impermeable or water-repellent back sheet, and a liquid-retaining absorbent interposed between the two sheets. The said absorber is an absorber formed by the manufacturing method of the absorber of this invention. When the absorbent produced in the present invention is used as an absorbent for an absorbent article, for example, as shown in FIG. 1, a fibrous material formed by mixing hydrophilic fibers 10a and synthetic fibers 10b and absorbent particles 10c. The accumulation layer side of is placed on the upper side of the skin side.

  FIG. 1 shows a cross-sectional view of an embodiment of an absorber 100 manufactured by the method of manufacturing an absorber according to this embodiment. The absorbent body 100 includes an aggregate 100a including a synthetic fiber 10b and a hydrophilic fiber 10a, and in the present embodiment, as shown in FIG. 1, in addition to the synthetic fiber 10b and the hydrophilic fiber 10a, an absorbent particle 10c is An aggregate 100a is included. Here, "including the synthetic fiber 10b" means having the sheet piece 10bh containing the synthetic fiber 10b.

  As shown in FIG. 1, in the absorbent body 100, both side portions bR and bL along the longitudinal direction of the core wrap sheet 100b as a covering sheet are folded back, and both side portions aR and aL along the longitudinal direction of the aggregate 100a The entire assembly 100a is covered by overlapping the two side portions bR and bL. The accumulation body 100a has a longitudinally long shape corresponding to the front-rear direction of the wearer when the absorbent article is worn.

In the absorbent body 100, the density of the sheet pieces 10bh is greater than the first layer 100a1 containing the fibrous material formed by mixing the hydrophilic fibers 10a and the sheet pieces 10bh and the absorbent particles 10c, and the first layer 100a1. It has the accumulation object 100a of the two-layer structure where the 2nd layer 100a2 containing the small textile material and absorptive particle 10c was laminated in the thickness direction. The existing density of the sheet pieces 10bh means the number of sheet pieces 10bh per 1 mm ^{2 of} an arbitrary cross section parallel to the thickness direction of the stack 100a.

  The stacked body 100a includes a plurality of sheet pieces 10bh (hereinafter, also simply referred to as sheet pieces 10bh) including the synthetic fibers 10b, and each sheet piece 10bh has a substantially rectangular shape. The average length of each sheet piece 10bh is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and particularly preferably 2 mm or more and 10 mm or less. Here, the average length indicates the average value of the lengths of the sides in the longitudinal direction when each sheet piece 10bh has a rectangular shape. When each sheet piece 10bh has a square shape, it indicates the average value of the lengths of any one of the four sides. When the average length of the sheet piece 10bh is 0.3 mm or more, it is easy to form a sparse structure in the absorber 100, and when it is 30 mm or less, it is difficult for the wearer to feel discomfort due to the absorber 100 The absorption performance is unlikely to be uneven depending on the position in the body 100. The average width of each sheet piece 10bh is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and particularly preferably 0.5 mm or more and 5 mm or less. Here, the average width indicates the average value of the lengths of the sides in the short direction when each sheet piece 10bh has a rectangular shape. When each sheet piece 10bh has a square shape, it indicates the average value of the lengths of any one of the four sides. When the average width of the sheet piece 10bh is 0.1 mm or more, it is easy to form a sparse structure in the absorber 100, and when it is 10 mm or less, it is difficult for the wearer to feel discomfort due to the absorber 100. It is hard to produce nonuniformity in absorption performance by the position in 100.

  As a fiber material which forms the absorber 100, the various things conventionally used for the absorber for absorbent articles can be used without a restriction | limiting especially. Examples of the hydrophilic fibers 10a include pulp fibers, rayon fibers, cotton fibers and the like. Examples of the synthetic fiber 10 b include short fibers such as polyethylene, polypropylene and polyethylene terephthalate. The sheet piece 10bh is not particularly limited as long as it has a sheet shape, but a non-woven fabric is preferable. Further, examples of the absorbent particles 10c include starch-based, cellulose-based, synthetic polymer-based, and superabsorbent polymer-based ones. Examples of the superabsorbent polymer include starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, crosslinked product of sodium carboxymethyl cellulose, and acrylic acid (salt) polymer. It can be used. As a component which constitutes absorber 100, a deodorizer, an antibacterial agent, etc. can also be used if needed. Examples of the core wrap sheet 100 b include fibrous sheets such as tissue paper and liquid permeable nonwoven fabric.

  Next, the method of manufacturing the absorbent according to the present invention will be described by taking the method of manufacturing the above-described absorbent 100 as an example with reference to FIGS. In FIG. 2 and FIG. 3, the whole structure of the manufacturing apparatus 1 of one Embodiment used for implementation of the manufacturing method of this embodiment is shown. In describing the method of manufacturing the absorbent 100 according to this embodiment, the manufacturing apparatus 1 for manufacturing the absorbent 100 will be described first.

  As shown in FIGS. 2 and 3, the manufacturing apparatus 1 is a fibrillation unit that disintegrates the hydrophilic sheet 10 as including the hydrophilic fiber 10 a from the upstream side to the downstream side in the transport direction using the fibrillation machine 21. 2, a duct 3 as a transport section for transporting the raw material of the absorber 100 in an air flow, a supply section 5 for supplying the synthetic fiber 10 b to the inside of the duct 3 from the middle of the duct 3, and the downstream side of the duct 3 A rotating drum 4 disposed adjacent to and having an accumulation portion for accumulating the raw materials of the absorber 100, and a pressing belt 7 disposed along an outer peripheral surface 4f opposite to the duct 3 in the rotating drum 4; And a covering portion 200 disposed below the rotary drum 4. In the manufacturing apparatus 1, a stacking recess 41, which is an example of the stacking unit, is disposed on the outer peripheral surface of the rotating drum 4.

In the following description, the direction in which the belt-like synthetic fiber sheet 10bs including the synthetic fiber 10b and the absorbent 100 are conveyed is the Y direction, the direction orthogonal to the conveying direction, and the width direction of the synthetic fiber sheet 10bs and the absorbent 100 which are conveyed. Is the X direction, and the thickness direction of the conveyed synthetic fiber sheet 10bs and the absorber 100 is the Z direction.
Further, the first direction described later is a direction extending in the transport direction Y, and means a direction in which the angle formed with the transport direction Y is less than 45 degrees. In the present embodiment and other embodiments described later, the first direction described later coincides with the direction parallel to the transport direction Y.
Moreover, the 2nd direction mentioned later is a direction which intersects with the 1st direction. In the present embodiment and other embodiments described later, the second direction is a direction orthogonal to the first direction, and coincides with the direction parallel to the width direction X of the synthetic fiber sheet 10bs to be conveyed and the absorber 100. .

  The manufacturing apparatus 1 is equipped with the disentanglement part 2 which disentangles the strip | belt-shaped hydrophilic sheet 10as containing the hydrophilic fiber 10a, as shown to FIG. 2 and FIG. The defibrating unit 2 includes a fibrillating machine 21 that fibrillates a belt-like hydrophilic sheet 10 as formed of hydrophilic fibers 10 a, and a casing 22 that covers the upper side of the fibrillating machine 21. The defibrating unit 2 is a portion that supplies the disintegrated hydrophilic fibers 10 a, which is a raw material of the absorber 100, to the flow path 30 inside the duct 3. The defibrating unit 2 also has a pair of feed rollers 23 and 23 for supplying the hydrophilic sheet 10as to the defibrating machine 21.

  At least one of the pair of feed rollers 23, 23 is configured to be rotated by a driving device (not shown). The pair of feed rollers 23 are nip-type rollers. As said drive device, a servomotor is mentioned, for example. From the viewpoint of preventing the hydrophilic sheet 10as from slipping, it is preferable that both of the pair of feed rollers 23, 23 be rotated by the driving device. In this case, the pair of feed rollers 23, 23 may be directly driven by the drive device, or one of the rollers may be driven by the drive device, and the drive may be transmitted to the other roller by transmission means such as a gear. Further, from the viewpoint of further preventing slippage with the hydrophilic sheet 10as, the pair of feed rollers 23, 23 form a groove extending in the axial direction over the entire circumference on the surface, or perform a coating process for improving the frictional force. It may be difficult to slip by applying it around the circumference. In addition to the pair of feed rollers 23, a roller may be provided to assist the transport of the hydrophilic sheet 10 as.

  The manufacturing apparatus 1 has the duct 3 which conveys the raw material of the accumulation body 100a of the absorber 100, as shown to FIG. 2 and FIG. The duct 3 extends from the defibrating unit 2 to the rotary drum 4, and the opening on the downstream side of the duct 3 covers the outer peripheral surface 4f located in the space A of the rotary drum 4 maintained at a negative pressure. . The duct 3 has a top plate 31 forming a top surface, a bottom plate 32 forming a bottom surface, and both side walls 33 and 34 forming both side surfaces. Inside of the duct 3 surrounded by the top plate 31, the bottom plate 32 and both side walls 33 and 34 by the operation of the intake fan (not shown) of the rotary drum 4, the absorber 100 is directed toward the outer peripheral surface 4 f of the rotary drum 4. Air flow is made to flow the raw materials of That is, the inside of the duct 3 is a flow passage 30.

  Further, in the manufacturing apparatus 1, as shown in FIGS. 2 and 3, an absorbent particle dispersion pipe 36 for supplying the absorbent particles 10 c into the duct 3 is disposed on the top plate 31 of the duct 3. In the absorbent particle dispersion tube 36, the absorbent particles 10 c are discharged from a dispersion port provided at the tip of the absorbent particle dispersion tube 36 through an apparatus (not shown) such as a screw feeder and supplied into the duct 3. It has become so. The amount of the absorbent particles 10c supplied to the absorbent particle distribution tube 36 can be adjusted by an apparatus (not shown) such as each screw feeder, and as a result, the absorbent particles 10c in the hydrophilic fibers 10a and the synthetic fibers 10b can be adjusted. The blending ratio can be freely adjusted. The absorbent particle scattering tube 36 is disposed between the defibrating unit 2 that breaks the hydrophilic sheet 10as into the hydrophilic fibers 10a and the supply portion 5 of the synthetic fiber 10b. The distribution of the absorbent particles 10c in the integrated body 100a of the absorber 100 can be adjusted by changing the arrangement position of. In addition, the thickness direction of the aggregate 100 a of the absorber 100 (Z direction) is obtained by changing the height (the distance between the top 31 and the distribution opening of the absorbent particle distribution tube 36) of the dispersion inlet of the absorbent particle distribution tube 36. The distribution of the absorbent particles 10c) can be adjusted.

  The manufacturing apparatus 1 has a rotating drum 4 as shown in FIGS. 2 and 3. The rotary drum 4 has an accumulation recess 41 as an accumulation portion for accumulating the raw materials of the absorber on the outer peripheral surface 4 f to form an accumulation body. The rotary drum 4 has a cylindrical shape, and receives power from a motor (not shown) such as a motor, and a member 40 forming the outer peripheral surface 4f rotates in the direction of arrow R1 about a horizontal axis. The rotary drum 4 has a member 40 forming the outer peripheral surface 4 f and a drum main body 42 located inside the member 40. The drum body 42 is fixed and does not rotate. In the manufacturing apparatus 1, the accumulation recess 41 of the rotating drum 4 is continuously disposed over the entire circumference of the rotating drum 4 in the circumferential direction (2Y direction). In the drawing, the 2Y direction is the circumferential direction of the rotary drum 4, and the X direction is the width direction of the rotary drum 4 (a direction parallel to the rotation axis of the rotary drum 4). As described above, in the present embodiment, the accumulation recess 41 of the manufacturing apparatus 1 is continuously disposed over the entire circumference of the rotary drum 4 in the circumferential direction (2Y direction). A configuration may be adopted in which a plurality of pieces are arranged at predetermined intervals in the circumferential direction (2Y direction).

  The drum body 42 of the rotary drum 4 has a plurality of mutually independent spaces, as shown in FIGS. 2 and 3, and has, for example, three spaces A to C. The spaces A to C are partitioned by a plate provided from the rotary shaft side of the rotary drum 4 toward the outer peripheral surface 4 f side. An intake fan (not shown) as an intake mechanism is connected to the rotary drum 4, and the pressure of a plurality of partitioned spaces in the rotary drum 4 can be adjusted by driving the intake fan. In the manufacturing apparatus 1, the suction force of the area corresponding to the space A, which is the upstream area located in the area covered by the outer peripheral surface 4 f with the duct 3, is the area corresponding to the spaces B to C which is the downstream area. It can be made stronger or weaker than the suction force, and the space A is maintained at a negative pressure. In addition, how to divide the space of the drum main body 42 is not limited to the form described above. For example, the space A maintained at the negative pressure of the drum main body 42 may be further divided into a plurality of sections so that the pressure can be adjusted for each finely divided space. Further, for example, the space B of the drum main body 42 is further divided into a plurality of spaces, and the pressure can be adjusted for each of the finely divided spaces. It is possible to adjust the negative pressure region to a position slightly before the accumulation recess 41 passes through the duct 3.

  The member 40 forming the outer peripheral surface 4f is disposed so as to cover the entire outer periphery of the drum main body 42, as shown in FIGS. 2 and 3, and receives power from a motor such as a motor. It rotates around the horizontal axis in the direction of arrow R1. A stacking recess 41 is formed in the member 40 forming the outer peripheral surface 4 f.

  The bottom surface of the accumulation recess 41 is formed of a porous member (not shown), and the accumulation recess 41 in the outer peripheral surface 4 f passes over the space maintained at a negative pressure in the rotating drum 4. During the operation, the porous member functions as a suction hole for sucking the raw material of the absorber 100.

  The manufacturing apparatus 1 is provided with the supply part 5 which supplies the sheet piece 10bh to the inside of the duct 3, as shown to FIG. 2 and FIG. The supply unit 5 has cutter blades 51 and 52 for cutting the belt-like synthetic fiber sheet 10bs including the synthetic fiber 10b in a first direction and a second direction with a predetermined length to form a sheet piece 10bh. And the supply part 5 has the suction nozzle 58 which attracts | sucks the sheet piece 10bh formed using the cutter edge 51,52. More specifically, in the manufacturing apparatus 1, the supply unit 5 includes a first cutter roller 53 having a plurality of cutter blades 51 for cutting in a first direction, and a plurality of cutter blades 52 for cutting in a second direction. And a second cutter roller 54. The supply unit 5 includes one receiving roller 55 disposed to face the first cutter roller 53 and the second cutter roller 54.

  In the manufacturing apparatus 1, as shown in FIGS. 2 to 4, the entire outer periphery of the first cutter roller 53 is provided along the circumferential direction of the first cutter roller 53 on the surface of the first cutter roller 53. A plurality of continuously extending cutter blades 51, 51, 51,... Are arranged in the axial direction (X direction) of the first cutter roller 53. The first cutter roller 53 is adapted to rotate in the direction of arrow R3 in response to power from a motor such as a motor. The distance between the cutter blades 51, 51, 51,... Adjacent to each other in the axial direction (X direction) of the first cutter roller 53 is the width of the sheet piece 10bh formed by cutting (the length in the short direction, Roughly corresponds to the length in the X direction). More precisely, the synthetic fiber sheet 10bs is cut in a state of being shrunk in the width direction X depending on the tension at the time of sheet conveyance, so that the tension is released in the finished sheet piece 10bh. The width of the sheet piece 10bh may be wider than the interval between the blades 51, 51, 51,.

  In the manufacturing apparatus 1, as shown in FIGS. 2 to 4, the entire width of the second cutter roller 54 is formed on the surface of the second cutter roller 54 along the axial direction (X direction) of the second cutter roller 54. A plurality of cutter blades 52, 52, 52,... Continuously extending across the second cutter roller 54 are spaced in the circumferential direction of the second cutter roller 54. The second cutter roller 54 receives power from a motor such as a motor and rotates in the direction of arrow R4.

  The receiving roller 55 is a flat roller whose surface is flat as shown in FIGS. The receiving roller 55 receives power from a motor such as a motor and rotates in the direction of the arrow R5.

  As shown in FIG. 2 and FIG. 3, the supply unit 5 receives the receiving roller 55 and the first cutter roller 53 from the upstream side to the downstream side in the rotational direction (arrow R5 direction) on the opposing surface of the receiving roller 55. And a free roller 56 for introducing a band-shaped synthetic fiber sheet 10bs, a first cutter roller 53 for cutting the band-shaped synthetic fiber sheet 10bs in a first direction (Y direction), and cut in a first direction (Y direction) A plurality of strip-shaped sheet pieces 10bh1 (hereinafter, also referred to as a sheet piece continuous body 10bh1) extending in the first direction (Y direction), the nip roller 57 for introducing between the receiving roller 55 and the second cutter roller 54; A second cutter roller 54 is provided in order to cut the continuous sheet piece 10bh1 in the second direction (X direction). Moreover, in the manufacturing apparatus 1, the supply part 5 has a feed roller (not shown) which conveys a strip | belt-shaped synthetic fiber sheet 10bs. The feed roller is configured to be rotated by a drive device such as a servomotor, for example. From the viewpoint of preventing the slip of the synthetic fiber sheet 10bs, the feed roller is made less slippery by forming a groove extending in the axial direction on its surface over the entire circumference or applying a coating treatment for improving the frictional force over the entire circumference. May be It may be difficult to slip by nipping between the nip roller and the feed roller.

  The manufacturing apparatus 1 has a suction nozzle 58 for suctioning the sheet piece 10bh formed by the second cutter roller 54, as shown in FIGS. The suction nozzle 58 has its suction port 581 located below the second cutter roller 54, that is, the rotation direction of the second cutter roller 54 relative to the closest point of contact between the second cutter roller 54 and the receiving roller 55 (arrow R4 Direction) is located downstream. Further, the suction nozzle 58 has its suction port 581 extending over the entire width of the second cutter roller 54. From the viewpoint of improving the suction performance of the sheet piece 10bh, the suction roller 581 of the receiving roller 55 and the second cutter roller 54 is arranged such that the suction port 581 of the suction nozzle 58 faces between the receiving roller 55 and the second cutter roller 54. It is preferable to arrange below. Then, from the viewpoint of further improving suction performance of the sheet piece 10bh, the suction port 581 of the suction nozzle 58 views the receiving roller 55 and the second cutter roller 54 from the side as shown in FIG. It is preferable to cover the outer surface of the second cutter roller 54 so that the arc length of the suction port 581 facing the second cutter roller 54 is longer than the arc length of the suction port 581 facing the.

  As shown in FIGS. 2 and 3, the suction nozzle 58 is connected to the top plate 31 side of the duct 3 via a suction pipe 59. The sheet piece 10 bh sucked from the suction port 581 of the suction nozzle 58 is supplied to the inside of the duct 3 from the middle of the duct 3 via the suction pipe 59. The connection position between the suction pipe 59 and the duct 3 is located between the defibrating unit 2 side and the rotary drum 4 side in the duct 3 in the manufacturing apparatus 1, and is more than the absorbing particle scattering pipe 36 in the duct 3. It is located downstream. However, the connection position between the suction pipe 59 and the duct 3 is not limited to this. For example, the connection position between the suction pipe 59 and the duct 3 may not be the top plate 31 side of the duct 3 but the bottom plate 32 side.

  As shown in FIGS. 2 and 3, the presser belt 7 is disposed along the outer peripheral surface 4 f adjacent to the downstream side of the position of the duct 3 and located in the space B of the rotating drum 4. The space B is set to a negative pressure or pressure zero (atmospheric pressure) weaker than the space A of the rotary drum 4. The presser belt 7 is an endless air-permeable or non-air-permeable belt, and is stretched over the rollers 71 and 72 so as to rotate along with the rotation of the rotary drum 4. In the case where the pressing belt 7 is a breathable belt, it is preferable that the material in the accumulation recess 41 is not substantially allowed to pass through. Even when the pressure in the space B is set to atmospheric pressure by the pressing belt 7, the stack 100a in the stacking recess 41 can be held in the stacking recess 41 until it is transferred onto the first vacuum conveyor 8a.

  As shown in FIGS. 2 and 3, the covering portion 200 is disposed above the first vacuum conveyor 8a, the second vacuum conveyor 8b disposed downstream of the first vacuum conveyor 8a, and the second vacuum conveyor 8b. And a folding guide plate 201 disposed. The first vacuum conveyor 8a is disposed below the rotary drum 4, as shown in FIGS. 2 and 3, in a space C set to a weak positive pressure or zero pressure (atmospheric pressure) of the rotary drum 4. It is distribute | arranged to the outer peripheral surface 4f located. For example, by blowing air from the inside of the drum main body 42 toward the outside of the outer peripheral surface 4 f, a weak positive pressure can be obtained. The first vacuum conveyor 8a includes an endless breathable belt 83a stretched over a driving roller 81a and driven rollers 82a and 82a, and an outer peripheral surface 4f located in the space C of the rotary drum 4 with the breathable belt 83a interposed therebetween. And a vacuum box 84a disposed at the opposite position. On the first vacuum conveyor 8a, a core wrap sheet 100b made of tissue paper, liquid permeable nonwoven fabric or the like is introduced. The second vacuum conveyor 8b includes an endless air-permeable belt 83b stretched over the drive roller 81b and the driven rollers 82b and 82b, and a vacuum box disposed at a position facing the folding guide plate 201 with the air-permeable belt 83b interposed. And 84b. The core wrap sheet 100b conveyed from the first vacuum conveyor 8a is delivered onto the second vacuum conveyor 8b. The folding guide plate 201 covers the entire stacked body 100 a by folding in the width direction both side portions bR and bL along the transport direction of the core wrap sheet 100 b transported by the second vacuum conveyor 8 b.

  Moreover, the manufacturing apparatus 1 is equipped with the cutting device 6 more downstream than the coating | coated part 200, and each absorber 100 is manufactured by this cutting device 6. As shown in FIG. As the cutting device 6, for example, in the production of absorbent articles such as sanitary napkins, light incontinence pads, panty liners, diapers, etc., those conventionally used for cutting absorbent continuous bodies are used without particular limitations. Can. Examples of the cutting device 6 include a cutter roller 62 provided with a cutting blade 61 on a pair of peripheral surfaces, and a smooth anvil roller 63 having a smooth peripheral surface for receiving the cutting blade 61.

  Next, a method of manufacturing the absorber 100 using the manufacturing apparatus 1 described above, that is, an embodiment of a method of manufacturing the absorber of the present invention will be described.

  The method of manufacturing the absorbent body 100 includes an accumulation step of accumulating a plurality of sheet pieces 10bh including at least the synthetic fibers 10b and the hydrophilic fibers 10a in an accumulation recess 41 as an accumulation portion to form an aggregate 100a; And a covering step of covering 100a with a core wrap sheet 100b. In addition, the method of manufacturing the absorbent body 100 includes a cutting step of cutting the band-like synthetic fiber sheet 10bs to form a plurality of sheet pieces 10bh, and a suction step of suctioning the formed sheet pieces 10bh. Moreover, the manufacturing method of the absorber 100 is equipped with the disintegrating process which obtains the hydrophilic fiber 10a, and the conveyance process which conveys the sheet piece 10bh and the hydrophilic fiber 10a to the recessed part 41 for accumulation | storage. Hereinafter, the manufacturing method of the absorber 100 is explained in full detail.

  First, the intake fan (not shown) connected to each of the space A in the rotary drum 4, the vacuum box 84a for the first vacuum conveyor 8a and the vacuum box 84b for the second vacuum conveyor 8b are operated. Apply negative pressure. By making the space A negative pressure, an air flow for conveying the raw material of the absorber 100 to the outer peripheral surface 4 f of the rotating drum 4 is generated in the duct 3. Further, the defibrator 21 and the rotary drum 4 are rotated, and the first cutter roller 53, the second cutter roller 54 and the receiving roller 55 are rotated, and the pressing belt 7, the first vacuum conveyor 8a and the second vacuum conveyor 8b are Activate.

  Next, a belt-like hydrophilic sheet 10as is supplied to the fibrillation machine 21 using the feed roller 23, and the fibrillation step is performed to fibrillate the fiber to obtain the hydrophilic fiber 10a. The pair of feed rollers 23, 23 is configured to control the supply speed of the hydrophilic sheet 10as to the fibrillating machine 21. In the disintegration step, the supply of the hydrophilic sheet 10 as to the disintegration device 21 is performed in a controlled manner.

  In the fibrillation step, as shown in FIGS. 2 and 3, the hydrophilic sheet 10as supplied to the fibrillation machine 21 is fibrillated and the hydrophilic fibers 10a which are fibrillated fiber materials are ducted from the fibrillation machine 21. It is supplied to 3.

  Moreover, the manufacturing method of the absorber 100 has a cutting process separately from a fibrillation process. In the cutting step, as shown in FIG. 4, the belt-like synthetic fiber sheet 10bs is formed in the first direction and the second direction using the first cutter roller 53 and the second cutter roller 54. It cut | disconnects in length and forms the sheet piece 10bh. In the cutting process of the present embodiment, a first cutter roller 53 for cutting the belt-like synthetic fiber sheet 10bs in a first direction (Y direction) at a predetermined length, and a predetermined direction in a second direction (X direction) A first cutter roller 53 and a second cutter roller 54 which cut the sheet by a length, and a receiving roller 55 disposed opposite to the first cutter roller 53 and the second cutter roller 54 are used. A band-like synthetic fiber sheet 10bs is introduced between the receiving rollers 55 and cut in the first direction to form a continuous sheet piece 10bh1, and the formed continuous sheet piece 10bh1 is conveyed by the receiving roller 55 and is second The sheet is cut in the second direction between the cutter roller 54 and the receiving roller 55 to form the sheet piece 10bh. The sheet piece 10bh formed in this manner is cut only in the first direction and the second direction. Hereinafter, the cutting process of the present embodiment will be specifically described.

  In the cutting process, the synthetic fiber sheet 10bs is conveyed using the above-described feed roller (not shown). The feed roller (not shown) is adapted to control the transport speed of the synthetic fiber sheet 10bs. In the cutting step, the transport speed of the synthetic fiber sheet 10bs is controlled and carried out.

  In the cutting process, as shown in FIG. 4, the synthetic fiber sheet 10bs conveyed by the feed roller is received by the receiving roller 55 which is a flat roller that rotates in the direction of arrow R5 via the free roller 56, and in the direction of arrow R3. The synthetic fiber sheet 10bs is introduced between the rotating first cutter roller 53 and the plurality of cutter blades 51, 51, 51, ... in the first direction at a position spaced in the second direction. Cut into By cutting in this manner, a plurality of sheet piece continuous members 10bh1 extending in the first direction and juxtaposed in the second direction (X direction) are formed. In the present embodiment, the plurality of cutter blades 51, 51, 51,... Are arranged on the surface of the first cutter roller 53 at equal intervals in the second direction. Therefore, since the synthetic fiber sheet 10bs is cut at equal intervals, a plurality of continuous sheet pieces 10bh1 having the same width (length in the second direction) are formed. The average width of the continuous sheet piece 10bh1 formed in the cutting step is preferably 0.1 mm or more and 10 mm or less from the viewpoint of securing dimensions necessary for the sheet piece 10bh to exhibit a predetermined effect, etc. The diameter is more preferably 0.3 mm or more and 6 mm or less, and particularly preferably 0.5 mm or more and 5 mm or less. In the present embodiment, the width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 corresponds to the length of the short side of the finally formed sheet piece 10bh. However, the width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 may be cut so as to correspond to the length of the longitudinal side of the finally formed sheet piece 10bh. In that case, the average width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and 2 mm or more It is particularly preferable that the diameter is 10 mm or less. The formed plurality of continuous sheet pieces 10bh1 are conveyed on the circumferential surface of the receiving roller 55 rotating in the direction of the arrow R5, conveyed between the receiving roller 55 and the nip roller 57, and received via the nip roller 57. It is introduced between 55 and the second cutter roller 54.

  Then, in the cutting process of the present embodiment, as shown in FIG. 4, in the second direction, between the receiving roller 55 rotating in the arrow R5 direction and the second cutter roller 54 rotating in the arrow R4 direction. A plurality of sheet piece continuum 10bh1 extending in the first direction juxtaposed are introduced, and the plurality of sheet piece continuum 10bh1 are intermittently carried out in the first direction by the plurality of cutter blades 52, 52, 52,. Cut in the second direction. By cutting in this manner, a plurality of rectangular sheet pieces 10bh whose length in the first direction is longer than the length in the second direction are formed. In the present embodiment, the plurality of cutter blades 52, 52, 52,... Are arranged on the surface at equal intervals in the circumferential direction of the second cutter roller 54, respectively. Therefore, since the plurality of continuous sheet pieces 10bh1 are cut at equal intervals, a plurality of rectangular sheet pieces 10bh having the same length in the transport direction Y are formed. The average length of the sheet pieces 10bh formed in the cutting step is preferably 0.3 mm or more and 30 mm or less from the viewpoint of securing dimensions necessary for the sheet pieces 10bh to exhibit a predetermined effect, and is 1 mm. The diameter is more preferably 15 mm or less, and particularly preferably 2 mm to 10 mm. In the present embodiment, the length of the sheet piece 10bh cut by the second cutter roller 54 corresponds to the length of the side in the longitudinal direction of the sheet piece 10bh. However, the length of the sheet piece 10bh cut by the second cutter roller 54 may be cut so as to correspond to the length of the side of the sheet piece 10bh in the short direction. The length (width) of the sheet piece 10bh cut by the cutter roller 54 is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and more preferably 0.5 mm or more and 5 mm It is particularly preferred that

  In the cutting step of the present embodiment, the strip-like synthetic fiber sheet 10bs is cut at a predetermined length in the first direction and the second direction to obtain the sheet piece 10bh including the synthetic fiber 10b. It is easy to adjust the size of the sheet piece 10bh to the intended size. As described above, since the sheet piece 10bh of the intended size can be formed with high accuracy, the absorbent body 100 with the target absorption performance can be efficiently and continuously manufactured.

  Then, using a suction nozzle 58 disposed below the second cutter roller 54, a suction step of suctioning and feeding the sheet piece 10bh obtained by cutting with the cutter rollers 53 and 54 into the inside of the duct 3 is performed. . Thus, the lower side of the second cutter roller 54, that is, the downstream side of the rotation direction of the second cutter roller 54 (the direction of the arrow R4 shown in FIG. 4) than the closest point of contact between the second cutter roller 54 and the receiving roller 55. In addition, when the suction port 581 of the suction nozzle 58 is disposed, the plurality of sheet pieces 10bh formed by cutting with the second cutter roller 54 and the receiving roller 55 can be suctioned efficiently.

  Then, the sheet piece 10bh sucked in the suction step and the hydrophilic fiber 10a supplied to the duct 3 in the disaggregation step are carried on the air flow, and carried to the collecting recess 41 of the outer peripheral surface 4f of the rotating drum 4 . In the transport process, the hydrophilic fibers 10 a are supplied into the duct 3, and a plurality of sheet pieces 10 bh are supplied to the inside of the duct 3 from the middle of the duct 3 through the suction process. Therefore, the sheet piece 10bh is carried on the air flow and conveyed while the hydrophilic fiber 10a is carried on the air flow and conveyed to the accumulation recess 41, and the sheet piece 10bh and the hydrophilic fiber 10a are The sheet piece 10bh is mixed with the hydrophilic fiber 10a while being put on the stream and conveyed. Further, in the transport step, the absorbent particles 10c are supplied using the absorbent particle scattering tube 36 located upstream of the connection position of the suction tube 59 and the duct 3, and the sheet piece 10bh, hydrophilic fiber The sheet pieces 10bh, the hydrophilic fibers 10a, and the absorbent particles 10c are mixed while transporting the absorbent particles 10c and the absorbent particles 10c in the air flow and conveying them to the accumulation recess 41.

  Then, the sheet piece 10bh conveyed in the conveying step, the hydrophilic fibers 10a and the absorbent particles 10c are accumulated in the accumulation recess 41 disposed on the outer peripheral surface 4f of the rotary drum 4 to form the accumulation body 100a. I do. Since the sheet piece 10bh is supplied from the top plate 31 side of the duct 3 while the hydrophilic fiber 10a is being transported from the upstream side in the transport direction of the duct 3, the hydrophilicity is transported toward the bottom plate 32 of the duct 3. The hydrophilic fiber 10a being transported toward the top plate 31 of the duct 3 is easier to be mixed with the sheet piece 10bh supplied from the top plate 31 side of the duct 3 than the sexing fiber 10a. Therefore, the sheet pieces 10bh and the hydrophilic fibers 10a are accumulated so that the existing density of the sheet pieces 10bh is different in the thickness direction of the aggregate 100a. In the stacking step, a region in which the number of sheet pieces 10bh conveyed toward the bottom plate 32 of the duct 3 is small is stacked inside the thickness direction in the stacking recess 41 to form the second layer 100a2, and the second layer The area | region where the number of sheet pieces 10bh conveyed with the top plate 31 side of the duct 3 is large on 100a2 is accumulated, and it forms 1st layer 100a1. The absorbent particles 10c are mixed and accumulated substantially in the entire thickness direction of the integrated body 100a.

  In the stacking step, the existing density of the sheet pieces 10bh and the hydrophilic fibers 10a in the thickness direction of the stack 100a changes, for example, the position at which the sheet pieces 10bh are supplied midway in the transport direction of the duct 3 upstream or downstream. It can be changed by Alternatively, the existing density of the sheet piece 10bh and the hydrophilic fiber 10a in the thickness direction of the stack 100a is changed, for example, depending on whether the position connecting the suction pipe 59 of the duct 3 is on the top plate 31 side or the bottom plate 32 side. be able to. For example, the sheet piece 10bh mixed in the thickness direction of the stack 100a as the position where the suction pipe 59 for supplying the sheet piece 10bh is connected from the middle of the transport direction of the duct 3 on the top plate 31 side becomes the upstream side. The hydrophilic fibers 10a become uniform.

  As described above, the first layer 100a1 in which the sheet pieces 10bh and the hydrophilic fibers 10a are mixed in the thickness direction in the accumulation recess 41 of the rotary drum 4, and the sheet pieces 10bh of the first layer 100a1. A stacked body 100a of the raw material of the two-layered absorber, which is stacked so as to have the second layer 100a2 having a low presence density, is formed. Then, the stacked body 100 a formed in the stacking recess 41 is continuously manufactured over the entire circumference of the rotary drum 4 in the circumferential direction (2Y direction). After an aggregate 100a in which the hydrophilic fibers 10a, the synthetic fibers 10b and the absorbent particles 10c are accumulated is formed in the accumulation recess 41, the rotary drum 4 is further rotated as shown in FIG. While pressing the stack 100 a in the stacking recess 41 by the pressing belt 7 disposed on the outer peripheral surface 4 f positioned at B, the stack 100 a is conveyed onto the vacuum conveyor 8.

  Next, as shown in FIG. 2, when the stack 100a in the stacking recess 41 comes to the opposite position of the vacuum box 84a located in the space C of the rotary drum 4 as shown in FIG. 2 and FIG. By suction from the box 84a, the mold is released from the accumulation recess 41. The stacked body 100a separated from the stacking recess 41 is placed on the central portion of one surface of the band-shaped core wrap sheet 100b transported by the first vacuum conveyor 8a, and delivered to the second vacuum conveyor 8b. Be A state in which the first layer 100a1 is positioned on the core wrap sheet 100b side and the second layer 100a2 is positioned on the opposite side of the core wrap sheet 100b in the thickness direction to the stacked body 100a mounted on one surface of the core wrap sheet 100b It has become.

  Then, on one surface of the second vacuum conveyor 8b, for example, as shown in FIG. 2, one side portion bR of the core wrap sheet 100b is placed on one side of the stacked body 100a mounted using the folding guide plate 201R. Starting from the side edge aR1 of the second layer 100a2, it is folded back so as to contact the surface of the second layer 100a2 to cover one side aR of the stack 100a. Then, using the folding guide plate 201L, the other side bL of the core wrap sheet 100b is brought into contact with the surface of the second layer 100a2 starting from the other side edge aL1 of the stacked body 100a placed. Fold back to cover the other side aL of the stack 100a. In this embodiment, the side portions bR and bL along the transport direction of the core wrap sheet 100b are folded back, and the folded back sides bR and bL are superimposed on the surface of the second layer 100a2 of the integrated body 100a. A coating process is performed to manufacture a band-like absorber 100 in which the entire stack 100 a is covered.

  As shown in FIG. 1, the band-like absorbent body 100 manufactured in this manner has a two-layered laminated body 100a, and both side portions bR and bL of the core wrap sheet 100b are higher than those of the first layer 100a1. It is in contact with the surface of the second layer 100a2 in which the existing density of the sheet piece 10bh is small. Since the sheet piece 10bh is hard to be exposed on the surface of the second layer 100a2, the surface of the second layer 100a2 and the both sides bR and bL of the core wrap sheet 100b contact with each other to the surface of the second layer 100a2. The side portions bR and bL do not slip easily, and the core wrap sheet 100b covering the stacked body 100a can be prevented from loosening. As a result, it is possible to suppress the shape collapse such as the spread body 100a spreading in the width direction, and the like, and it is possible to stably manufacture the absorber 100 having a good formability.

  In particular, if the stacked body is formed so as not to have the sheet piece 10bh in the second layer 100a2 in the accumulation step, the sheet piece 10bh is less likely to be exposed on the surface of the second layer 100a2. Loosening can be suppressed, and the shape of the absorber 100 can be effectively suppressed.

  An application step of applying an adhesive on one surface of the core wrap sheet 100b is provided, and in the coating step, the surface of the second layer 100a2 of the aggregate 100a and the core wrap sheet 100b are fixed via the adhesive. Is preferred. By fixing the stack 100a to the core wrap sheet 100b with an adhesive, the stack 100a is further less likely to be deformed, and an absorbent having good formability can be stably manufactured. In addition, when covering the stacked body 100a including the sheet piece 10bh with the core wrap sheet 100b, if the surface where the sheet piece 10bh is exposed and the core wrap sheet 100b are fixed with an adhesive, the sheet piece 10bh of a relatively large size is relatively large. Since it is easy to move in the stack 100a, the core wrap sheet 100b bonded to the sheet piece 10bh may be displaced together with the sheet piece 10bh and may be loosened to cause a shape deformation. Therefore, when the surface of the second layer 100a2 and the side portions bR and bL of the core wrap sheet 100b are in contact with each other, the above-mentioned problems can be suppressed, and the absorber 100 with good formability can be stably manufactured. As an adhesive applied to the core wrap sheet 100b, a hot melt adhesive or the like is preferable. In addition, it is preferable that an adhesive be applied to the core wrap sheet 100b by a spiral turn.

  Further, in the covering step of the present embodiment, as shown in FIG. 1, since the side edges bR1 and bL1 of the both sides bR and bL of the core wrap sheet 100b are folded back so as to overlap with each other, Collapse can be suppressed more effectively.

  Thereafter, the strip-like absorbers 100 are cut at predetermined intervals in the transport direction by the cutting device 6 to manufacture the individual absorbers 100. In the absorbent article having the absorbent body 100 manufactured in this manner, since the sheet pieces 10bh of the intended size are dispersed, the feeling of foreign matter in use of the absorbent article is small, and the feeling of use is improved.

The present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the method of manufacturing the absorbent 100 described above, the absorbent core 100 is manufactured by folding the core wrap sheet 100b so that the two side portions bR and bL overlap each other to cover the entire assembly 100a. For example, as shown in FIG. 5, without overlapping the side portions bR and bL of the core wrap sheet 100b, the side edges bR1 and bL1 are flush with each other to cover the aggregate 100a and thereby the absorbent 100 is obtained. It may be manufactured. Also, for example, as shown in FIG. 6, an absorbent may be manufactured in which the entire stack 100 a is covered with two or more sheets. For example, when manufacturing the absorber shown in FIG. 6, the stack 100a is placed on the first sheet 100b1 using two sheets 100b1 and 100b2, and both sides of the first sheet 100b1 are mounted. The side portions bR and bL of the first sheet 100b1 are folded back so as to cover the side portions aR and aL of the stack 100a by the portions bR and bL. And it can manufacture by covering the part which is not covered by the 1st sheet 100b1 of accumulation object 100a using the 2nd sheet 100b2 with the 2nd sheet 100b2.

  Moreover, although the absorber 100 has the accumulation body 100a of the said two-layer structure, the existing density of the sheet piece 10bh has the surface of the accumulation body 100a which both sides bR and bL of the core wrap sheet 100b turn back and contact. As long as relatively small layers are disposed, it may be an integrated body 100 a of three or more layers.

  Moreover, although the absorber 100 mentioned above contained the absorptive particle 10c in 2nd layer 100a2, the structure which did not contain the absorptive particle 10c in 2nd layer 100a2 but contained the absorptive particle 10c only in 1st layer 100a1. Alternatively, both the first layer 100a1 and the second layer 100a2 may not include the absorbing particles 10c. In order to form an aggregate 100a in which the second layer 100a2 does not contain the absorbent particles 10c but only the first layer 100a1 contains the absorbent particles 10c, for example, as shown in FIG. By providing a partition plate 38 extending from the upstream side of the particle dispersion tube 36 to the rotary drum 4, a plurality of flow paths are formed in the duct 3, and the absorbent particles 10 c are not transported to one flow path The manufacturing apparatus 1 shown in FIG. 7 can be used. By using the manufacturing apparatus 1 shown in FIG. 7, the second layer 100a2 includes the layer of only the hydrophilic fibers 10a, the first layer 100a1 of the sheet 100b, the hydrophilic fibers 10a, and the absorbent particles 10c. It can be formed. In addition, if the manufacturing apparatus 1 shown in FIG. 7 is used, the suction pipe 59 is disposed on the downstream side of the absorbent particle scattering pipe 36, so the partition plate 38 has the sheet piece 10bh in the second layer 100a2. It is possible to reliably form an integrated body 100a.

  Further, in the present embodiment, the sheet piece 10bh is manufactured using the cutting step, but the sheet piece 10bh manufactured in advance may be used, or the sheet piece 10bh manufactured by a method other than the cutter blade may be used. . In the cutting step of this embodiment, as shown in FIG. 2, a first cutter roller 53 having a plurality of cutter blades 51 arranged at equal intervals and a plurality of cutters arranged at equal intervals The synthetic fiber sheet 10bs is cut using the second cutter roller 54 provided with the blade 52 to produce sheet pieces 10bh of the same size, but the cutting direction of the sheet pieces 10bh and the shape of the sheet pieces 10bh are For example, the first cutter roller 53 provided with a plurality of cutter blades 51 to have two or more types of intervals or the plurality of cutter blades 52 to have two or more types of intervals The synthetic fiber sheet 10bs may be cut using the second cutter roller 54 to produce a sheet piece 10bh. When manufactured in this manner, sheet pieces 10bh of two or more types of sizes can be formed, but unlike the manufacture using a cutter mill method, sheet pieces 10bh of the intended size can be formed with high accuracy. Thus, absorbents with targeted absorption performance can be produced efficiently and continuously.

  Moreover, in the manufacturing apparatus 1 shown in FIG. 2, the supply unit 5 includes the first cutter roller 53 and the second cutter roller 54, but instead of the two cutter rollers, the first direction ( The cutter blade 51 cutting in the Y direction) and the cutter blade 52 cutting in the second direction (X direction) may have one cutter roller provided on the same circumferential surface. In the case where the supply unit 5 includes the one cutter roller, it is preferable that the supply unit 5 includes one receiving roller disposed to face the one cutter roller. In a manufacturing apparatus having the one cutter roller and the one receiving roller, the suction port 581 of the suction nozzle 58 is preferably disposed below the one cutter roller.

  In the cutting step of this embodiment, as shown in FIG. 2, the synthetic fiber sheet 10bs is cut using the first cutter roller 53 and the second cutter roller 54 to manufacture a sheet piece 10bh. Using a press equipped with a cutter blade 51 that cuts in a first direction (Y direction) without using a cutter roller, and a press equipped with a cutter blade 52 that cuts in a second direction (X direction) The synthetic fiber sheet 10bs may be cut to produce a sheet piece 10bh.

  Moreover, in the conveyance process of this embodiment, although the absorptive particle 10c is supplied using the absorptive particle dispersion tube 36, it is not necessary to supply the absorptive particle 10c.

  In addition, the shape of the manufactured aggregate 100 a may be flexibly changed by changing the shape of the accumulation recess 41. Moreover, you may hydrophilize the fiber used for the synthetic fiber 10b.

Reference Signs List 1 manufacturing apparatus 2 defibrating unit 21 defibrating machine 3 duct 30 channel 4 rotating drum 41 recessed part for accumulation 10a hydrophilic fiber 10b synthetic fiber 10bh sheet piece 10c absorbent particle 100 absorber 100a accumulated body aR, aL both sides of accumulated body aR1, aL1 Side edges of the stack 100b Core wrap sheet bR, bL Both sides of core wrap sheet 201R, 201L Folding guide plate

Claims (7)

An accumulation step of accumulating a plurality of sheet pieces containing synthetic fibers and hydrophilic fibers in an accumulation part to form an aggregate;
The stack is placed on one side of a band-like covering sheet to be conveyed, and both sides along the conveying direction of the covering sheet are folded back to cover at least both sides of the accumulation along the conveying direction A method of manufacturing an absorber comprising
The accumulated body in which in the accumulation step, a first layer in which the sheet piece and the hydrophilic fiber are mixed, and a second layer having a smaller density of the sheet pieces than the first layer are laminated in a thickness direction Form
The manufacturing method of the absorber which turns over so that the above-mentioned both sides of the covering sheet may contact the surface of the second layer of the accumulation object in the covering process.   The manufacturing method of the absorber according to claim 1 which forms said accumulation object which said 2nd layer does not have said sheet piece in said accumulation process. An application step of applying an adhesive to the one side of the covering sheet,
The manufacturing method of the absorber according to claim 1 or 2 which fixes said covering sheet and the surface of said 2nd layer of said accumulation object via said adhesive agent in said covering process.   The method for manufacturing an absorbent according to any one of claims 1 to 3, wherein in the covering step, the both sides of the covering sheet are folded back so that both side edges of the both sides overlap each other. And c) cutting the strip-like synthetic fiber sheet containing the synthetic fibers in a first direction and a second direction intersecting the first direction at a predetermined length to form a plurality of the sheet pieces,
The manufacturing method of the absorber according to any one of claims 1 to 4 which accumulates a plurality of said sheet pieces formed at said cutting process in said accumulation process, and forms said accumulation object.   In the cutting step, the belt-like synthetic fiber sheet is cut using a first cutter roller provided with a cutter blade for cutting in the first direction to form a strip-like continuous sheet piece, and the second The manufacturing method of the absorber of Claim 5 which cut | disconnects this strip | belt-shaped sheet piece continuous body, and forms two or more said sheet pieces using the 2nd cutter roller provided with the cutter blade which cut | disconnects in a direction.   The said 1st direction is a direction which conveys the said strip | belt-shaped synthetic fiber sheet in the said cutting process, The said 2nd direction is a direction orthogonal to the said 1st direction, The absorber of Claim 5 or 6 Manufacturing method.