TWI590812B - Absorber manufacturing apparatus of absorbent article, and manufacturing method - Google Patents

Description

Manufacturing device of absorbent body for absorbent article, and manufacturing method

The present invention relates to a manufacturing apparatus and a manufacturing method of an absorbent body for an absorbent article such as a disposable diaper.

An disposable diaper, a sanitary napkin, or the like is used as an absorbent article that absorbs excretion of urine or menstrual blood. Further, these absorbent articles have the absorbent body 1 as a member for absorbing the excretion liquid, and the absorbent body 1 is a liquid absorbent material such as a pulp fiber or a particulate superabsorbent polymer (hereinafter also referred to as SAP). Formed into a single piece.

The monolithic absorber 1 is produced by the fiberizing device 110 of the production line as shown in the schematic longitudinal cross-sectional view of Fig. 1A. The fiber assembly device 110 includes a rotary drum 120, and the outer peripheral surface 120a of the rotary drum 120 is discretely arranged in a plurality of concave portions 121, 121, ... in a planar shape corresponding to the planar shape of the absorbent body 1 in the circumferential direction Dc. A plurality of intake ports 121h, 121h, ... are provided on the bottom surface 121a of each recess 121. In addition, a dispersion duct 131 is provided to face the outer peripheral surface 120a of the rotary drum 120 at a predetermined position in the circumferential direction Dc, and the liquid discharge property of the pulp fibers, SAP, and the like is supplied from the dispersion duct 131 toward the outer peripheral surface 120a in a scattering state. Material 2.

Therefore, when the recesses 121, 121, ... pass through the position of the duct 131, the suction of the air inlets 121h, 121h, ... of the recess 121 attracts the liquid absorbing material on the bottom surface 121a of the recess 121. In addition, the liquid-absorbent material 2 formed into a single sheet shape is taken out from the concave portion 121 at a predetermined position on the downstream side in the circumferential direction Dc to produce a single-piece absorbent body 1.

Patent Document 1 discloses that as a modification technique of the fiber-splitting device 110, a plurality of regions having different depths from each other are provided on the bottom surface 121a of the concave portion 121, whereby the basis weight (g/m ² ) of the absorber 1 is partially different. . Therefore, according to this technique, the degree of freedom in designing the product can be improved in accordance with the difference in the amount of liquid absorbable in accordance with each portion of the absorbent body 1.

[Previous Technical Literature] [Patent Document]

Patent Document 1 Japanese Patent Laid-Open No. 2000-234255

However, in this case, since the depth of the concave portion 121 varies depending on each region, the thickness of the absorbent body 1 other than the basis weight also becomes locally different. Further, when the thickness of the absorbent body 1 is partially different, when the liquid absorbing material 2 is taken out from the concave portion 121 of the rotary drum 120 as the absorbent body 1, there is a problem in the stability of the extraction of the absorbent body 1 or the like.

For example, generally from the outer peripheral surface 120a of the rotary drum 120 When the concave portion 121 takes out the absorbent body 1 and transports it to a subsequent step, the flat surface 42a of the endless belt 42 of the belt conveyor 41 that moves in the conveying direction or the flat surface of the sheet-like member such as a non-woven fabric is used as the conveying surface 42a to absorb the absorbent body. 1 is transferred to the surface 42a, but the distance between the conveying surface 42a and the surface 1s of the absorbent body 1 differs depending on the respective portions of the absorbent body 1 when transferring in the above-described configuration. In other words, when the depth of the concave portion 121 is different as described above, the surface 1s of the absorbent body 1 that is affected by the contact with the conveying surface 42a is also uneven. As a result, the conveying surface 42a and the surface of the absorbent body 1 are caused by the unevenness. The distance between them varies depending on the respective portions of the absorbent body 1. Then, in the larger portion, the absorbent body 1 is deformed by being pulled by the conveying surface 42a, and conversely, when the distance is small, the conveying surface 42a is compressed to cause wrinkles.

Alternatively, when the depth of the concave portion 121 is different, a phenomenon different from the above may occur. That is, even if unevenness is generated on the surface 1s of the absorbent body 1, a difference in thickness occurs in accordance with each portion of the absorbent body 1, in which case a difference in rigidity occurs in accordance with the difference in thickness of each portion of the absorbent body 1. . Then, when the absorbent body 1 is transferred from the curved surface which is the outer peripheral surface 120a of the rotary drum 120 to the plane of the surface 42a of the endless belt 42 due to the difference in rigidity, the absorbent body 1 is wrinkled. The speed difference between the surface of the belt conveyor 41 on the side of the belt conveyor 41 and the surface of the absorber 1 on the side of the rotating drum 120 due to the difference in thickness causes the transfer to be unstable and the productivity is lowered.

On the other hand, before the problem of the above-mentioned patent document 1, the method of shaping the absorber 1 in the one recessed part 121 is 1B. As shown in the enlarged view of the upper portion of the rotary drum 120 in the drawing, the end portion 1eu on the upstream side in the circumferential direction Dc of the absorbent body 1 is prone to uneven distribution of SAP, and the absorbent body 1 is transferred due to uneven distribution. Deformation. That is, since the SAP has a larger specific gravity than the pulp fiber, it is easily affected by the inertial force, and as a result, according to the inertial force, the SAP rolls in the concave portion 121 toward the upstream side in the opposite direction to the rotation direction of the rotary drum 120, and touches The wall surface 121w on the upstream side of the concave portion 121 is stopped. Therefore, the SAP is biased at the end portion 1eu on the upstream side of the absorbent body 1, and the absorbent body 1 is easily deformed at the end portion 1e when taken out from the concave portion 121.

Here, as a solution to the problem of uneven distribution of the SAP, the following method is conceivable. First, the rotating drum 20 (see, for example, FIG. 3) is prepared, and an endless groove portion 21 is provided over the entire circumference of the outer peripheral surface 20a instead of discretely providing the plurality of recesses 121, 121, ... The drum 120 is rotated. In this way, the liquid absorbing material 2 is sucked and accumulated in the groove portion 21, and the continuous deposit 2 is taken out from the groove portion 21, whereby the continuum 1r of the absorbent body is produced, and then the absorbent body is cut by The continuous body 1r is a method of producing the monolithic absorber 1. Further, according to this method, since the groove portion 21 has no wall surface 121w on the upstream side in the case where the recess portion 121 is completely absent, the problem of the SAP offset described above is surely solved, and as a result, the deformation when transferred to the conveying surface 42a is also Effectively suppressed.

However, since the continuous body 1r of the absorbent body which is formed by sucking and depositing the liquid absorbent material 2 such as pulp fibers and SAP is large in volume and low in rigidity, it is difficult to apply pressure at the time of cutting, and the cutting property is not good. and In addition, the decrease in the cutting property tends to be more pronounced as the basis weight of the continuous body 1r of the absorbent body is smaller.

The present invention has been developed in view of the above conventional problems, and an object thereof is to improve the cutting property when the absorbent body is cut from the continuous body of the absorbent body.

The main invention for achieving the above object is an apparatus for producing an absorbent body for an absorbent article, which comprises an absorbent body having a first basis weight portion in which a liquid absorbent material is deposited at a first basis weight, and a liquid absorbent material. a second basis weight portion which is stacked at a basis weight higher than the first basis weight, and has a suction stacking device that sucks the liquid absorbing material by sucking air from a plurality of suction ports of the suction surface a continuous body of the absorbent body that is formed on the suction surface and that is continuous in a predetermined direction; and a cutting device that sets the absorbent body at a boundary position of the absorbent body that is set on the continuous body of the absorbent body at intervals in the predetermined direction The continuum is cut to generate the absorber, and the suction surface has a first suction region that forms the intake port at a first aperture ratio and a second aperture ratio that is higher than the first aperture ratio. The second suction region of the intake port includes the boundary position in the second suction region.

In addition, a method for producing an absorbent body of an absorbent article, which is manufactured by absorption The body has a first basis weight portion in which the liquid absorbing material is deposited at the first basis weight, and a second basis weight portion in which the liquid absorbing material is deposited at a basis weight higher than the first basis weight, and has a feature of: a step of sucking and depositing the liquid-absorbent material on the suction surface by inhaling a plurality of suction ports from the suction surface to generate a continuous body of the absorber in a predetermined direction; and setting the interval in the predetermined direction a step of forming the absorbent body by cutting a continuous body of the absorbent body at a boundary position of the absorbent body on the continuous body of the absorbent body, wherein the suction surface has a first opening ratio to form the suction port The first suction region and the second suction region forming the intake port at a second aperture ratio higher than the first aperture ratio, and the second suction region includes the boundary position.

Other features of the present invention will be apparent from the description of the specification and the accompanying drawings.

According to the present invention, it is possible to improve the cutting property when the absorbent body is cut from the continuous body of the absorbent body.

1‧‧‧ absorber

1B‧‧‧Basic weight transfer section

1BL‧‧‧ boundary position

1L‧‧‧Low basis weight (1st basis weight part)

1M‧‧‧zhong heavy part

1H‧‧‧High basis weight part (2nd basis weight part)

1a‧‧‧ Ventral part

1ae‧‧‧End

1b‧‧‧ Back side part

1be‧‧‧ end

1c‧‧‧胯下下

1eu‧‧‧ end

1r‧‧‧Continuous body of absorbent body

1s‧‧‧ surface

2‧‧‧Liquid Absorbent Materials

2r‧‧‧ Deposits

10‧‧‧ Manufacturing equipment

10a‧‧‧Manufacture of equipment

11‧‧‧Attraction stacking device

20‧‧‧Rotating drum

20a‧‧‧ outer perimeter

20f‧‧‧Ring members

20p‧‧‧Cylinder components

20pd‧‧‧ arc-shaped members (divided members)

20pd1‧‧‧ Breathable board

20pd2‧‧‧ pattern board

20pd3‧‧‧ lining

21‧‧‧Slots

21a‧‧‧Bottom (attraction surface)

21BL‧‧‧Boundary position

21u‧‧‧Unit slot

21ua‧‧‧ unit floor

21h‧‧‧ suction port

22a‧‧‧Cylindrical partition

22b‧‧‧ partition wall

31‧‧‧Distribution catheter

31a‧‧‧ mouth

41‧‧‧Inhalation belt conveyor (withdrawal and removal device)

42‧‧‧Endless belt

42a‧‧‧Outer surface (transport surface)

44‧‧‧ Roller

45‧‧‧Attraction generating agency

45b‧‧‧Sucker box

45bh‧‧ ‧ opening for inhalation

51‧‧‧挟压装置

52d‧‧‧roll

52u‧‧‧roll

61‧‧‧cutting device

62c‧‧‧Cutting rolls

62a‧‧‧Anvil Roll

63‧‧‧Cutting knife

110‧‧‧Fiber assembly

120‧‧‧Rotating drum

120a‧‧‧ outer perimeter

121‧‧‧ recess

121a‧‧‧ bottom

121h‧‧‧ suction port

121w‧‧‧ wall

131‧‧‧Distribution catheter

AL‧‧‧Low attraction area (1st attraction area)

AM‧‧‧Attraction area

AH‧‧ high attraction area (second attraction area)

B1‧‧‧ Sticks

B2‧‧‧ Sticks

S‧‧‧ inner side space

Sd‧‧‧Slightly closed space

Zone 1 of Z1‧‧

Zone Z2‧‧‧

C20‧‧‧Cylinder shaft (tube axis direction)

Dc‧‧ weeks direction

1A is a schematic longitudinal cross-sectional view of a conventional fiber-splitting device 110, and FIG. 1B is an enlarged view of an upper portion of a rotating drum 120 of the fiber-splitting device 110.

2A is a schematic plan view of the absorbent body 1 manufactured by the manufacturing apparatus 10 of the first embodiment, and FIG. 2B is a basic weight distribution pattern of the center position of the absorbent body 1 in the width direction.

Fig. 3 is a schematic longitudinal cross-sectional view showing a manufacturing apparatus 10 of the first embodiment.

Fig. 4 is a developed view of the outer peripheral surface 20a of the rotary drum 20.

Fig. 5 is a partial enlarged view showing the intake port distribution pattern set on the unit bottom surface 21ua of the unit groove portion 21u, and the outer peripheral surface 20a of the rotary drum 20.

Fig. 6 is a schematic perspective view showing a part of the divided members 20pd and 20pd with the cylindrical member 20p shown.

Fig. 7 is a schematic perspective view showing the split member 20pd further divided into three types of members 20pd1, 20pd2, and 20pd3.

Fig. 8 is a schematic longitudinal cross-sectional view showing a manufacturing apparatus 10a of the second embodiment.

From the description of the specification and the attached drawings, at least the following items are known.

An apparatus for producing an absorbent body for an absorbent article, wherein the absorbent body produced includes: a first basis weight portion in which the liquid absorbent material is deposited at a first basis weight; and a liquid absorbent material having a base higher than the first basis weight a second basis weight portion of the heavy stack, characterized by having: a suction stacking device, which is inhaled by a plurality of suction ports from the suction surface a liquid absorbing material that is sucked and accumulated on the suction surface, and which is formed as a continuous body of the absorbent body that is continuous in a predetermined direction; and a cutting device that is disposed on the continuous body of the absorbent body at intervals in the predetermined direction The boundary portion is formed by cutting the continuous body of the absorber, thereby generating the absorber, wherein the suction surface has a first suction region that forms the intake port at a first aperture ratio, and a first aperture ratio The second higher opening ratio forms a second suction region of the intake port, and the second suction region includes the boundary position.

According to the apparatus for manufacturing an absorbent body of the absorbent article, the absorbent system is produced by cutting the continuous body of the absorbent body at the boundary position described above, but the boundary position is formed in the suction surface at a high opening ratio. The second suction region of the intake port is formed by sucking the liquid absorbing material at a high basis weight in the second suction region. Therefore, the boundary position can be included in the high basis weight portion of the continuous body of the absorbent body, and as a result, the continuous body can be cut off with high cutting property.

In the apparatus for manufacturing an absorbent body, the suction stacking device includes a rotary drum that continuously rotates in a single direction along a circumferential direction, and an endless groove portion that is formed on an outer peripheral surface of the rotary drum over the entire circumference. The liquid absorbing material is sucked and accumulated by the bottom surface as the suction surface; the scattering duct is disposed at the first predetermined position in the circumferential direction, and the liquid absorbing material is spread toward the outer circumferential surface of the rotating drum. And the liquid transporting material which is placed in the second predetermined position in the circumferential direction, and the liquid absorbing material which is sucked and accumulated by the groove portion is used as a continuous body of the absorbent body, and is taken out from the groove portion while being transported. It is preferable that the depth of the groove portion is constant over the entire length in the width direction of the groove portion and the entire length in the circumferential direction.

According to the apparatus for manufacturing an absorbent body of such an absorbent article, the depth of the groove portion is constant over the entire surface of the bottom surface of the groove portion. Therefore, the thickness of the continuous body of the absorbent body can be made substantially constant over the entire length in the longitudinal direction of the continuous body and the full width in the width direction, and as a result, the continuous body of the absorbent body can be taken out from the groove portion of the rotary drum, and can be taken out and transported. When the conveying surface of the apparatus is received, the distance from the conveying surface can be kept substantially constant throughout the entire length of the continuous body of the absorbent body and the full width. Therefore, it is possible to stably transfer to the conveying surface while suppressing the deformation of the continuous body of the absorbent body.

In the apparatus for manufacturing an absorbent body, the number of the intake ports per unit area of the second suction region is set to be larger than the number of the intake ports per unit area of the first suction region. It is preferable that the opening area and the opening shape of the intake port have the same specifications between the first suction region and the second suction region.

According to the apparatus for manufacturing an absorbent body of such an absorbent article, the opening specification of the opening area and the opening shape of the intake port is single. kind. Therefore, it is easy to find an opening specification that effectively restricts the passage of the liquid absorbing material while suppressing the clogging caused by the liquid absorbing material, and as a result, it is easy to design the suction port.

In the apparatus for manufacturing an absorbent body, preferably, the rotary drum has a cylindrical member that constitutes the outer peripheral surface of the rotary drum, and the cylindrical member has a unit corresponding to the absorber in the circumferential direction. a plurality of divided members each having a unit groove portion corresponding to the groove portion, and a plurality of the divided members are adjacently arranged in the circumferential direction so as to be adjacent to each other in the circumferential direction The aforementioned unit groove portions adjacent to each other are continuous with each other.

According to the apparatus for manufacturing an absorbent body of the absorbent article, when the divided members are arranged adjacent to each other in the circumferential direction, the outer peripheral surface having the endless groove portion can be formed as the outer peripheral surface of the rotary drum. Therefore, the rotary drum having the outer peripheral surface can be produced at low cost.

In the apparatus for manufacturing an absorbent body, it is preferable that the second suction region is continuous so as to straddle a boundary position between the unit groove portions adjacent to each other in the circumferential direction.

According to the apparatus for manufacturing an absorbent body of the absorbent article, the second suction region is formed to be continuous so as to straddle the boundary position between the unit groove portions. Therefore, it is possible to reliably form a portion having a high basis weight at the boundary position of the absorber of the continuum of the absorber.

In the apparatus for manufacturing an absorbent body, it is preferable that the take-out conveyance device has a periphery that is the conveyance surface. An endless belt that faces the outer circumference of the rotating drum and that is rotated to drive, and an attraction generating mechanism that generates an attractive force on the outer peripheral surface of the endless belt.

According to the apparatus for manufacturing an absorbent body of such an absorbent article, an attractive force is generated on the outer peripheral surface of the endless belt. Therefore, the continuous body of the absorber of the groove portion of the rotary drum can be smoothly transferred to the outer peripheral surface of the endless belt.

Preferably, the apparatus for producing an absorbent body has a rolling device that presses the continuous body of the absorbent body in a thickness direction of the continuous body of the absorbent body, and the continuous absorbent body is pressed by the rolling device. The system is transported to the cutting device.

According to the manufacturing apparatus of the absorbent body of the absorbent article, the continuous system is pressed in the thickness direction by the rolling device before the continuous body of the absorbent body is cut, whereby the entire continuous system of the absorbent body becomes dense and dense. status. Therefore, it is possible to effectively prevent deformation or breakage of the continuous body of the absorbent body at the time of cutting. Further, since the surface of the continuous body is tight, it is possible to effectively prevent the liquid-absorbent material on the surface from being peeled off during the cutting, and to adhere to and accumulate in the cutting device, and it is possible to effectively prevent the cutting device accompanying the adhesion. The cutting property is deteriorated.

Further, in the method for producing an absorbent body of an absorbent article, the absorbent body produced has a first basis weight portion in which the liquid absorbent material is deposited at the first basis weight, and the liquid absorbent material is higher than the first basis weight. Basis accumulation The second basis weight portion is characterized in that the liquid absorbing material is sucked and accumulated on the suction surface by suction from a plurality of suction ports of the suction surface, and the absorbing body is continuous in a predetermined direction. And a step of forming the absorbent body by cutting a continuous body of the absorbent body at a boundary position of the absorbent body disposed on the continuous body of the absorbent body at intervals in the predetermined direction, thereby generating the absorbent body The first suction region in which the intake port is formed at a first aperture ratio, and the second suction region in which the intake port is formed at a second aperture ratio higher than the first aperture ratio, and the second suction region is formed in the second suction region. The area contains the aforementioned boundary position.

According to the method for producing an absorbent body of the absorbent article, the absorbent system is produced by cutting the continuous body of the absorbent body at the boundary position described above, but the boundary position is formed in the suction surface at a high opening ratio. The second suction region of the intake port is formed by sucking the liquid absorbing material at a high basis weight in the second suction region. Therefore, the boundary position can include the high basis weight portion of the continuous body of the absorbent body, and as a result, the continuous body can be cut off with high cutting property.

[First Embodiment]

Fig. 2A is a schematic plan view of the absorbent body 1 manufactured by the manufacturing apparatus 10 of the first embodiment. Further, Fig. 2B is a basis weight distribution pattern at the center position in the width direction of the absorbent body 1.

The absorbent body 1 is, for example, a disposable diaper or a sanitary napkin. A member of the absorbent article has a function of absorbing excretion of urine or menstrual blood. Therefore, the absorbent body 1 has pulp fibers and SAP as the liquid absorbing material 2. Further, the absorbent body 1 has a longitudinal direction, a width direction, and a thickness direction as three directions orthogonal to each other. Then, in the example of FIG. 2A, the outer shape of the plane defined by both the longitudinal direction and the width direction is an approximate hourglass shape in which the portion corresponding to the crotch portion 1c is tapered in the width direction. However, the outer shape is not limited thereto, and may be, for example, a substantially rectangular shape.

The absorbent body 1 is formed by depositing the liquid absorbing material 2 in the thickness direction in accordance with an appropriate basis weight distribution pattern. In this example, the basis weight distribution pattern has three values as the basis weight target value (g/m ² ). That is, the absorber 1 has a low basis weight portion 1L (corresponding to the first basis weight portion) stacked at a low basis weight target value, and a high base piled up at a basis weight target value higher than a low basis weight target value. The heavy portion 1H (corresponding to the second basis weight portion), and the medium basis weight portion 1M stacked with a medium basis weight target value between the low basis weight target value and the high basis weight target value. Then, the low basis weight portion 1L is set to the back side portion 1b other than the end portion 1be of the longitudinal direction of the absorbent body 1, and the high basis weight portion 1H is basically set to be other than one portion of the underarm portion 1c. The lower portion 1c and the ventral portion 1a.

However, with respect to the latter high basis weight portion 1H, the end portion 1be of the back side portion 1b in the longitudinal direction is also set in a thin strip shape along the width direction. Therefore, in the basis weight distribution pattern, the high basis weight portion 1H is set at both end portions 1ae and 1be in the longitudinal direction of the absorber 1. In this case, the cutting is performed when the single-piece absorbent body 1 is cut by the continuous body 1r of the absorbent body. The break is extremely relevant, but the relevant description will be described later.

Further, the middle basis weight portion 1M is a portion on the back side of the crotch portion 1c, and is set at both sides in the width direction. Thus, the situation in which the basis weight is substantially higher than the basis weight target value by the partial pressing of the diaper is effectively avoided.

Further, as shown in Fig. 2B, the boundary between the mutually adjacent portions of the high basis weight portion 1H and the low basis weight portion 1L and the medium basis weight portion 1M is adjacent to each other. The basis weight of the portion of one portion to the base portion of the other portion gradually changes the basis weight shift portion 1B of the basis weight. In other words, since the absorbent body 1 is caused to attract the liquid absorbing material 2 as described later, the basis weight of the low basis weight portion 1L to the high basis weight portion 1H is changed as shown in Fig. 2B. The system is gradually increasing. Therefore, the basis weights of the adjacent boundary portions of the portions 1L, 1M, and 1H whose basis weight target values are different from each other do not change in a stepwise manner.

Fig. 3 is a schematic longitudinal cross-sectional view showing the manufacturing apparatus 10 of the absorbent body 1. This manufacturing apparatus 10 has a suction stacking device 11 and a cutting device 61. The suction stacking device 11 has a suction surface 21a. A plurality of intake ports 21h, 21h, ... are formed on the suction surface 21a. Therefore, the liquid absorbing material 2 is sucked by the respective intake ports 21h and deposited on the suction surface 21a, and is produced by the continuous body 1r of the absorber which is continuous in a predetermined direction. Then, the produced continuous body 1r of the absorbent body is taken out from the suction surface 21a and transported to the cutting device 61. The continuous body 1r of the absorbent body to be conveyed by the cutting device 61 is cut at the boundary position 1BL of the absorbent body 1 set on the continuous body 1r, whereby the single-piece absorbent body 1 is produced. Following, for sucking The stacking device 11 and the cutting device 61 will be described.

<<<Attraction stacking device 11>>>

The suction stacking device 11 has a cylindrical rotating drum 20 as a main body. The rotary drum 20 is continuously rotated in a single direction (clockwise in FIG. 3) in the circumferential direction Dc with the cylinder axis C20 as a center of rotation. Further, on the outer peripheral surface 20a of the rotary drum 20, an endless groove portion 21 is formed over the entire circumference thereof. The bottom surface 21a of the groove portion 21 functions as the above-described suction surface 21a. That is, a plurality of intake ports 21h, 21h, ... are formed in the bottom surface 21a of the groove portion 21. The intake ports 21h, 21h, ... perform an intake operation when the liquid absorbing material 2 is deposited in the groove portion 21. However, when the liquid absorbing material 2 deposited in the groove portion 21 is taken out as the continuum 1r of the absorber from the groove portion 21, the air jet operation of ejecting air from the air inlet 21h is reversed. Further, the intake operation and the jet operation are realized in the following manner.

First, the space in the groove portion 21 is permeable to the inner peripheral side space S of the rotary drum 20 through the intake ports 21h. Further, a cylindrical partition wall 22a is provided in the inner peripheral side space S of the rotary drum 20 in the same manner as the rotary drum 20, whereby a ring-shaped slightly closed space Sd is formed on the inner peripheral side of the rotary drum 20. . Further, the slightly closed space Sd is divided by the plurality of partition walls 22b in the circumferential direction Dc region. For example, the first region Z1 shown in Fig. 3 is maintained at a lower pressure than the outer air pressure, and the opposite is true. The second zone Z2 on the downstream side maintains a slightly higher air pressure than the outside air pressure. Therefore, when the suction port passes through the first zone Z1, the suction port performs suction aspiration. However, the jet action is performed when passing through the second zone Z2.

Further, as shown in FIG. 3, in the circumferential direction Dc and the position corresponding to the first zone Z1 (corresponding to the first predetermined position), the distribution duct 31 is provided to face the outer circumferential surface 20a of the rotary drum 20, and The mouth portion 31a of the distribution duct 31 faces the outer peripheral surface 20a, and the pulp fibers and SAP are supplied as the liquid absorbing material 2 in a scattering state. Further, the suction belt conveyor 41 (corresponding to the removal conveyance mechanism) is disposed at a position corresponding to the second zone Z2 in the circumferential direction Dc (corresponding to the second predetermined position).

Therefore, when the intake port 21h of the groove portion 21 of the rotary drum 20 passes through the position where the duct 31 is dispersed, the suction port 21h performs the intake operation, and the liquid absorbing material 2 is sucked on the bottom surface 21a of the groove portion 21. By stacking, the deposit 2r of the continuous liquid absorbing material 2 is formed along the circumferential direction Dc.

In addition, when the intake port 21h passes through the second zone Z2 on the downstream side in the circumferential direction Dc, the intake port 21h performs the jet operation, so that the deposit 2r is taken out from the groove portion 21 as the continuous body 1r of the absorber. The suction belt conveyor 41 disposed opposite to the second zone Z2 is sucked and transmitted. Then, it is conveyed to the cutting device 61 by the suction belt conveyor 41.

Further, the suction belt conveyor 41 is a well-known conveyor 41 that can generate an attractive force on the conveying surface 42a. In other words, the conveyor 41 has an endless belt 42 that drives the outer peripheral surface 42a of the conveying surface 42a to face the outer peripheral surface 20a of the rotating drum 20, and causes the outer peripheral surface 42a of the endless belt 42 to attract. Force attraction agency 45.

Here, the drive gyration of the endless belt 42 is achieved, for example, in the following manner. First, the endless belt 42 is placed on a suitable plurality of rollers 44, 44, and at least one of the rollers 44, 44 is driven as a driving roller 44 that is rotated by a servo motor (not shown) of a driving source. Thereby, the driving force is obtained from the driving roller 44, and the endless belt 42 is driven to rotate.

Further, the attraction generating mechanism 45 is realized, for example, in the following manner. First, as the above-described endless belt 42, an endless belt 42 having a plurality of through holes (not shown) along the thickness direction is used, and a suction box 45b is disposed, and the suction box 45b is interposed between the endless belt 42 and The second zone Z2 is opposed to the air intake opening 45bh. By sucking the through hole of the endless belt 42 by the intake of the intake opening 45bh, the suction force is generated on the outer peripheral surface 42a of the endless belt 42 of the conveyance surface 42a.

However, although the development view of the outer circumferential surface 20a of the rotary drum 20 is shown in Fig. 4, the overall length of the circumferential direction Dc of the bottom surface 21a of the groove portion 21 of the rotary drum 20 is set to substantially the longitudinal direction of the absorbent body 1. An integral multiple of the full-length dimension (for example, 6 times in Figure 4). In other words, in the case where the outer peripheral surface 20a of the rotary drum 20 is defined as a unit groove portion 21u in a planar shape recessed portion of the absorber 1, the unit groove portion 21u is in the circumferential direction Dc and the adjacent unit groove portion 21u. The groove portions 21 are connected to each other in the circumferential direction in a number corresponding to the integral multiple (for example, six in the fourth drawing). Therefore, the base surface 21ua of the unit groove portion 21u, that is, the unit bottom surface 21ua, has the basis weight distribution pattern of the second FIG. In a manner in which the absorber 1 is deposited, a plurality of intake ports 21h, 21h are formed in a predetermined intake port distribution pattern on each unit bottom surface 21ua.

Fig. 5 is a partially enlarged view showing the outer circumferential surface 20a of the rotary drum 20 of the intake port distribution pattern set on the unit bottom surface 21ua. As shown in Fig. 5, the unit bottom surface 21ua has a low suction region AL (corresponding to the first suction region) in which the intake ports 21h and 21h are formed at a low aperture ratio (corresponding to the first aperture ratio). The aperture ratio (corresponding to the second aperture ratio) which is higher than the low aperture ratio forms a high attraction region AH (corresponding to the second attraction region) of the intake ports 21h, 21h, ...; and a low aperture ratio and a high opening The medium aperture ratio between the rates forms a medium suction region AM of the intake ports 21h, 21h....

Further, according to the difference in the aperture ratios, the respective basis weight portions 1L, 1M, and 1H having different basis weight target values are stacked in the respective regions AL, AM, and AH. For example, in the high attraction region AH, the liquid absorbing material 2 is deposited at a high basis weight according to its high aperture ratio, whereby the main high basis weight portion 1H is formed. Further, in the low attraction region AL, the liquid absorbing material 2 is deposited at a low basis weight according to its low aperture ratio, whereby the main low basis weight portion 1L is formed. Moreover, in the medium attraction region AM, the liquid absorbing material 2 is deposited at a medium basis weight according to a medium aperture ratio, thereby forming the main medium basis weight portion 1M. Incidentally, the "opening ratio" referred to herein means the total inhalation occupied by the area of the calculation of the aperture ratio (including the opening area of the intake ports 21h, 21h, ... formed in the area). The ratio of the area of the mouth 21h, 21h....

Here, in the manufacturing apparatus 10 of the first embodiment, As shown in FIG. 2A, the high-weight portions 1H and 1H are respectively formed at both end portions 1ae and 1be in the longitudinal direction of the absorber 1, and the both end portions of the circumferential direction Dc of the unit bottom surface 21ua are respectively set as shown in FIG. High attraction area AH, AH. Specifically, the end portion on the downstream side in the circumferential direction Dc of the unit bottom surface 21ua is continuously extended from the center portion to the high suction region AH, but the end portion on the upstream side in the circumferential direction Dc is also set along the end portion. The strip-shaped high suction region AH in the width direction of the groove portion 21. Therefore, the unit bottom surfaces 21ua and 21ua adjacent to each other in the circumferential direction Dc are connected to each other by the high suction regions AH and AH in the circumferential direction Dc. Then, the boundary position 21BL between the unit bottom surfaces 21ua and 21ua, in other words, the boundary position 21BL between the unit groove portions 21u and 21u, is the same as the boundary position 1BL between the absorbers 1 and 1, so that it is absorbed according to the above-described pattern arrangement. The boundary position 1BL between the absorbers 1 and 1 that are virtually set on the continuous body 1r is included in the high suction region AH. Therefore, when the continuous body 1r of the absorbent body is cut at the boundary position 1BL and the absorbent body 1 is produced at the boundary position 1BL, the high basis weight portion 1H is cut, and as a result, good cutting property can be ensured.

In addition, it is preferable that the depth of the groove portion 21 is constant over the entire length of the groove portion 21 in the width direction and the total length of the circumferential direction Dc. Then, in this manner, the thickness of the continuous body 1r of the absorbent body can be formed to be substantially constant over the entire length in the longitudinal direction of the continuous body 1r and the full width in the width direction, and as a result, the groove portion 21 of the rotary drum 20 can be obtained. When the continuous body 1r of the absorbent body is taken out and received on the conveying surface 42a of the suction belt conveyor 41, that is, the outer peripheral surface 42a of the endless belt 42, the continuum 1r of the absorbent body can be spread. The full length and the full width of the full width are kept substantially constant from the conveying surface 42a. Therefore, it is possible to stably shift to the outer peripheral surface 42a of the endless belt 42 while effectively suppressing the deformation of the continuous body 1r of the absorbent body.

Incidentally, the stability of the above-described transfer operation is such that the thinner the thickness of the continuous body 1r of the absorber, the easier it is to weaken. The reason for this is that the distance between the outer peripheral surface 42a of the endless belt 42 and the outer peripheral surface 20a of the rotary drum 20 is generally maintained in the range of 1 to 2 mm regardless of the thickness of the continuous body 1r of the absorbent body. A constant value, the thinner the thickness, the greater the distance required for transfer. On the other hand, recently, thin absorbent articles have gradually become mainstream, and accordingly, the absorbent body 1 tends to be thinner. Therefore, in the future, the improvement of the stability of the above-described shifting operation becomes a more important problem. In this regard, when the depth of the groove portion 21 is constant as described above, the shift can be improved as compared with the case where the depth of the groove portion 21 is not constant. The stability of the turn. That is, if the depth of the groove portion 21 is constant, it is possible to meet the recent demand for thinning.

Further, it is preferable to set the aperture ratios of the intake ports 21h and 21h, respectively, in accordance with the low suction region AL, the middle suction region AM, and the high suction region AH described above, for each region AL, AM, The number of formation of the intake ports 21h, 21h, ... per unit area formed by AH may be adjusted by the number of openings (number / m ² ). For example, as shown in Fig. 5, the number of formations of the medium attraction region AM is larger than that of the low attraction region AL (number/m ² ), and the number of formation of the high attraction region AH is larger than that of the medium attraction region AM (number / m ² ). Therefore, it is sufficient to adjust the aperture ratios corresponding to the respective areas AL, AM, and AH. In this way, in the opening area and the opening shape of the intake port 21h, the low suction area AL and the middle suction area AM and the high suction area AH can be made the same size, and as a result, the design of the intake port 21h can be easily performed. . In other words, the opening specifications of the opening area and the opening shape can be unified into a single type. Therefore, it is easy to find an opening specification that effectively restricts the passage of the liquid absorbing material 2 while suppressing the clogging caused by the liquid absorbing material 2. It is easy to design the suction port 21h. Therefore, in this example, it is performed in this manner (refer to Fig. 5).

On the other hand, the shape of the opening of the intake port 21h may be an appropriate shape such as a perfect circle, a circular shape, or a rectangular shape such as a rectangle. However, in this example, a perfect circle is used as shown in Fig. 5. Therefore, in the case where the shape of the opening is a perfect circle, the aperture size may be defined instead of the aperture area. In this example, the aperture is selected from a range of 0.1 to 1.0 mm. Further, the opening area is selected from the range of 0.007 to 0.8 mm ² .

Further, in this example, the 60° staggered arrangement pattern is used as the arrangement pattern of the intake port 21h in any of the above-described low suction region AL, medium suction region AM, and high suction region AH. Here, the 60° staggered arrangement pattern is formed by arranging the intake ports 21h and 21h at the respective vertices of the plurality of equilateral triangles that are adjacent to each other and are adjacent to each other as shown in FIG. The pattern, in other words, may be referred to as a staggered arrangement in which the distances between adjacent suction ports 21h and 21h are all the same. Further, in the case of the 60° staggered arrangement, the distance between the adjacent intake ports 21h and 21h is different between the low suction region AL, the middle suction region AM, and the high suction region AH. Suction port 21h The number of formations is different from each other in the respective regions AL, AM, and AH. Incidentally, the thickness of the absorber 1 can be made substantially equal by using a 60° staggered arrangement pattern. However, it is not limited to the 60° staggered arrangement pattern, and for example, a lattice arrangement pattern in which the intake ports 21h and 21h are disposed at the intersections of the lattice patterns may be employed.

However, the outer peripheral surface 20a of the rotary drum 20 including the above-described groove portion 21 is formed by a suitable cylindrical member 20p as shown in Fig. 3. Therefore, the cylindrical member 20p may be formed as a single member that is integral and integral with the entire circumference of the circumferential direction Dc. However, in some cases, the cylindrical member 20p may be divided into a plurality of divided members in units of the unit groove portion 21u. 20pd, 20pd... In this case, the latter is used.

Fig. 6 and Fig. 7 are explanatory views of the divided members 20pd, 20pd, . Fig. 6 is a schematic perspective view showing a part of the divided members 20pd and 20pd with the cylindrical member 20p shown in the figure. Fig. 7 is a schematic perspective view showing the divided members 20pd further divided into three kinds of members 20pd1, 20pd2, and 20pd3.

Each of the divided members 20pd shown in Fig. 6 is an arc-shaped member 20pd which is curved by a curvature corresponding to the curvature of the outer peripheral surface 20a of each of the cylindrical members 20p. Further, as shown in Fig. 7, each of the divided members 20pd has an arc-shaped gas permeable plate 20pd1 having air permeability formed by the intake ports 21h, 21h, and the outer peripheral surface of the gas permeable plate 20pd1. Covering and fixing, a pair of arc-shaped pattern plates 20pd2 and 20pd2 of the unit groove portion 21u having a slight sand leakage shape are formed on the outer circumferential surface; and the gas permeable plate 20pd1 is reinforced by the inner circumferential surface backing Fixed to the The frame-like lining of the inner peripheral surface is 20pd3.

Then, as shown in Fig. 6, the divided members 20pd, 20pd, ... are arranged to face the pair of annular members 20f and 20f which are opposed to each other at intervals in the cylinder axis direction C20 of the rotary drum 20. The circumferential direction Dc is arranged adjacent to each other without a gap, whereby the plurality of divided members 20pd, 20pd, ... are in the state of the above-described cylindrical member 20p. Further, in the both sides of the cylindrical member 20p in the cylinder axial direction C20, a disk-shaped sealing member (not shown) may be slidably provided with respect to the cylindrical member 20p, whereby the cylindrical shaft of the cylindrical member 20p Both ends of the direction are sealed separately. As a result, on the inner peripheral side of the rotary drum 20, the inner peripheral side space S is defined as a slightly closed space.

However, the pattern plates 20pd2 and 20pd2 are respectively provided at positions of both ends of the rotary drum 20 in the cylinder axis direction C20. Further, by this, the central portion of the cylinder axis direction C20 of the rotary drum 20 is not covered in the gas permeable plate 20pd1, and only the both end portions are covered with the pattern plates 20pd2, 20pd2, and as a result, the unit groove portion 21u is in the circumferential direction Dc. The adjacent unit groove portions 21u and 21u are connected without a dielectric.

Further, as shown in Fig. 7, the frame-like lining 20pd3 is formed in a lattice shape with a plurality of bars B1, B1, ..., B2, B2, ... in the circumferential direction Dc and the cylinder axis direction C20. Made of components. Therefore, in this example, the rod portions B1, B1, ... in the cylinder axis direction C20 are arranged in the circumferential direction Dc as a plurality of examples, and the rod portions B2, B2 in the circumferential direction Dc. Three are arranged in the cylinder axis direction C20 as a plural.

Here, the rod portions B1 and B1 at both ends of the circumferential direction Dc among the six rod portions B1, B1, ... of the former are located at both ends of the circumferential direction Dc among the unit groove portions 21u. Therefore, the accumulation property of the liquid absorbing material 2 at the boundary position 1BL of the absorber 1 which is cut by the cutting device 61 is somewhat affected. However, even in this case, the portion of the unit groove portion 21u corresponding to the rod portions B1, B1 at the both end positions is established with the high suction regions AH, AH of the highest opening ratio in the same unit groove portion 21u. Correspondence, so its impact can be mitigated.

<<<cutting device 61>>

As shown in Fig. 3, the cutting device 61 is disposed adjacent to the downstream end portion of the suction belt conveyor 41 in the conveyance direction. Then, the continuous body 1r of the absorbent body conveyed by the suction belt conveyor 41 is cut at the boundary position 1BL of the absorbent body 1, whereby the single-piece absorbent body 1 is produced. Further, although the boundary position 1BL is repeated in the bottom surface 21a of the groove portion 21 as shown in Fig. 5, it is included in the high suction region AH, so that the continuous body 1r of the absorber contains high accumulation at a high basis weight. The basis weight portion 1H. Therefore, the continuous body 1r of the absorbent body can be cut with high cutting force.

As shown in Fig. 3, in this example, the cutting device 61 has a pair of rollers 62c and 62a which are arranged in a pair in the thickness direction of the continuous body 1r of the absorbent body while facing the outer peripheral surfaces thereof. Each of the rollers 62c and 62a continuously drives and rotates the continuous body 1r of the absorbent body in the conveyance direction of the suction belt conveyor 41 while feeding the continuous body 1r of the absorbent body downstream of the conveyance direction. One of the pair of rollers 62c, 62a The outer peripheral surface has a cutting blade 62c of cutting blades 63 and 63 (two cutting blades 63 and 63 in the example of Fig. 3), and the other roller 62a uses the outer circumference of the cutting blades 63 and 63 of the cutting roller 62c. An anvil roll 62a received by a suitable receiving portion provided on the outer peripheral surface. Therefore, in the continuous body 1r of the absorbent body conveyed from the suction belt conveyor 41, the cutting blade 63 of the continuously rotating cutting roller 62c abuts at the boundary position during the process between the rollers 62c, 62a. 1BL causes the continuous body 1r of the absorber to be partially pressed at the position 1BL to be cut, whereby the absorber 1 is produced.

Here, in order to accurately cut the continuous body 1r of the absorbent body at the boundary position 1BL as described above, it is necessary to control the cutting when the boundary position 1BL of the absorbent body 1 of the continuous body 1r passes through the arrangement position of the cutting device 61. The rotation of the roller 62c causes the cutter blade 63 to abut against the boundary position 1BL, and the control is realized, for example, in the following manner.

First, the suction stacking device 11 and the cutting device 61 are controlled to perform actions corresponding to each other in accordance with the synchronization signals. Here, the synchronization signal refers to an aggregate of unit signals in which a predetermined unit signal repeats continuous output, and each time a unit signal is output, each device 11 and 61 performs a action to be performed on one absorber, respectively. The control is performed by an appropriate control unit such as a computer or a programmable controller (hereinafter referred to as a PLC).

For example, in the case where the unit angle signal has a rotation angle value of 0° or more and less than 360° (hereinafter, expressed as 0° to 360°) as the rotation angle value of the one rotation, if the suction accumulation device 11 is used, When the output unit signal is 0°~360°, the rotation of the drum 20 is equivalent. In the rotation angle of one absorbent body 1 (for example, in the example of Fig. 3 or Fig. 4, the rotary drum 20 has six unit groove portions 21u, 21u, ..., and therefore 60° (= 360 ° / 6)) The servo motor (not shown) as the driving source of the rotary drum 20 is controlled by an appropriate control unit (not shown) (for example, position control), and is also applied to the suction belt conveyor 41. When the output unit signal is 0° to 360°, the continuum 1r of the absorber is continuously conveyed so as to correspond to the conveyance amount of one absorber 1, and the servo motor (not shown) serving as the drive source of the conveyor 41 is borrowed. Control is performed by an appropriate control unit (not shown) (for example, position control).

Further, the cutting device 61 also rotates the cutting roller 62c by the rotation angle of one absorbent body 1 every time the unit signal is outputted by 0° to 360° (for example, in the example of Fig. 3, the cutting roller 62c has two. Since the cutting blades 63 and 63 are 180° (=360°/2), the servo motor (not shown) serving as the driving source of the roller 62c is controlled by a suitable control unit such as a computer or a PLC (not shown). ) Control (such as position control). In addition, when the above-described boundary position 1BL passes the roll gap between the cutter roller 62c and the anvil roller 62a, the cutting device 61 outputs the value of the unit signal in advance, and is known in advance by a test operation or the like. For example, when the unit signal has a rotation angle value of 0° to 360° as described above, the rotation angle value of the unit signal to be output when the boundary position 1BL passes through the roller gap is known in advance by a test operation or the like, for example, is 90°. Therefore, for example, when the rotation angle value of 90° is output, the rotational angle position of the cutter roller 62c is previously mechanically adjusted, for example, so that the cutter blade 63 is closest to the outer circumferential surface of the anvil roller 62a, and thereafter, whenever the absorbent body is Boundary position of continuum 1r When 1BL passes the position of the cutting device 61, the cutter roller 62c rotates to bring the cutter blade 63 into contact with the boundary position 1BL. Incidentally, the position control of each of the servo motors described above is realized by a well-known control method such as feedback control. For example, each servo motor is internally provided with a rotation angle measuring sensor such as a rotary encoder, and the corresponding control units are such that the actual value of the rotation angle of the motor output shaft measured by the sensor is used. The rotation of the output shaft is controlled in such a manner that the difference between the command values becomes smaller.

[Second Embodiment]

Fig. 8 is a schematic longitudinal cross-sectional view showing a manufacturing apparatus 10a of the second embodiment. The difference from the first embodiment described above is that an additional rolling device 51 is provided between the suction stacking device 11 and the cutting device 61. In other words, the main difference is that the continuous body 1r of the absorbent body is pressed in the thickness direction by the rolling device 51, and then cut by the cutting device 61. Therefore, the other aspects are substantially the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in Fig. 8, the rolling device 51 is disposed adjacent to the downstream end portion of the suction belt conveyor 41 in the conveying direction. Then, the continuous body 1r of the absorbent body conveyed by the suction belt conveyor 41 is pressed in the thickness direction, and the continuous body 1r of the absorbent body is sent to the cutting device 61 while being pressed. Here, the continuous body 1r of the absorber after passing through the rolling device 51 is made into a high-density compact state by rolling. Therefore, deformation or breakage of the continuous body 1r of the absorbent body which occurs at the time of subsequent cutting can be effectively prevented. In addition, the squeezing also allows the continuum 1r Since the surface of the liquid absorbing material 2 on the surface is effectively peeled off during the cutting, and adhered to and deposited on the cutting edge of the cutting blade 63 of the cutting device 61, the adhesion and accumulation can be effectively prevented. The cutting property of the cutter blade 63 is lowered.

In this example, the rolling device 51 has rollers 52u and 52d that face each other in a direction in which the outer peripheral surfaces that are smooth with each other are opposed to each other and are arranged in the thickness direction of the continuous body 1r of the absorbent body. Then, each of the rollers 52u and 52d is continuously driven to rotate in such a manner that the continuous conveyance body 1r of the absorbent body is simultaneously sent downstream in the conveyance direction in the conveyance direction of the suction belt conveyor 41. The rotation speed values of the respective rollers 52u and 52d are controlled by the appropriate control unit such as a computer or a PLC so as to be substantially the same value as the conveyance speed value of the continuous body 1r of the absorber, whereby the roller 52u can be used. The continuous body 1r of the absorbent body is pressed in a state where the relative sliding of the outer peripheral surface of 52d is almost absent.

However, the rolling device 51 is not limited to the configuration of the pair of rollers 52u and 52d described above. For example, although not shown, it is also possible to have a device in which one of the outer peripheral surfaces as the conveying surface is disposed opposite to each other. In other words, in the case of the device, the pair of endless belts are pressed from the thickness direction of the continuous body 1r of the absorbent body, and the endless belts are fed to the continuous body 1r of the absorbent body in the continuous direction. The swirling is driven, whereby the continuous body 1r of the pressed absorbent body is conveyed to the cutting device 61.

[Other Embodiments]

The embodiments of the present invention have been described above, but the above is true. The present invention is not to be construed as limiting the invention. In addition, the invention may be modified or modified without departing from the spirit and scope of the invention, and the invention may of course include equivalents thereof. For example, it can be deformed as shown below.

In the above-described embodiment, as the cutting device 61, a device 61 having a cutting roller 62c and an anvil roller 62a is exemplified, and the device 61 is pressed against the outer circumferential surface of the anvil roller 62a or the receiving portion by the cutting blade 63. The continuous body 1r of the absorbent body is partially pressed and cut, but the cutting method is not limited thereto. For example, the outer peripheral edge of the disk may be cut by a so-called rotary blade that is driven to rotate around the center of the disk, or may be provided in a pair in the thickness direction of the continuous body 1r of the absorber. The blade member is cut like a scissors.

However, when the continuum of the above-mentioned absorbent body 1r is large and the low-rigidity object is cut, the cuttability is reduced, and the basis weight is lowered. When the pressure is locally pressed and cut, it is more remarkable. Presented. Therefore, in the case of the apparatus having the cutter roller 62c and the anvil roller 62a shown in the first and second embodiments, the present invention is more effective.

In the above-described embodiment, the device 11 having the rotating drum 20 as the main body is exemplified as the suction stacking device 11, but the invention is not limited thereto. For example, an apparatus may be used which has an endless belt that drives a convolution in a predetermined orbiting belt, an endless groove portion that is formed endlessly in a continuous direction of the endless belt on the outer peripheral surface of the endless belt, and an endless groove portion. a plurality of intake ports formed on the bottom surface and a predetermined position of the orbiting track disposed on the endless belt, and the liquid absorbing material 2 is supplied toward the outer peripheral surface of the endless belt Spread the catheter.

In the above-described embodiment, a signal having a rotation angle value of 0° to 360° is exemplified as a unit signal of the synchronization signal, but is not limited thereto. For example, the unit signal may be a digital signal having a digital value of 8192 from 0 to 8191, or may be a signal of a different form.

In the above-described embodiment, as shown in FIG. 5, the medium suction regions AM and AM are set in a portion of the unit bottom surface 21ua that is located on the upstream side of the substantially central portion of the circumferential direction Dc and at both end portions in the width direction. But this also has the following meaning. In other words, as shown in FIG. 5, the liquid absorbing material 2 is also sprinkled without forming the intake ports 21h, 21h, etc. in the outer portion of the unit bottom surface 21ua in the width direction. Down in this section. Then, the liquid absorbing material 2 sprinkled in this portion is not adsorbed on the portion, and the portion on the upstream side in the circumferential direction Dc thereof, in other words, the portion in which the medium suction region AM is set in FIG. This part is stacked. Then, in this case, if the current state is the above-described portion of the middle attraction region AM, and the high suction region AH is set, the basis weight of the portion becomes extraordinarily higher than the high suction region AH, and as a result, the diaper is worn. Will give people a significant sense of discomfort. Therefore, in the example of FIG. 5, in order to avoid the problem of the uncomfortable feeling, the regions AM and AM are attracted in this portion setting.

1BL‧‧‧ boundary position

20a‧‧‧ outer perimeter

21‧‧‧Slots

21a‧‧‧Bottom (attraction surface)

21BL‧‧‧Boundary position

21u‧‧‧Unit slot

21ua‧‧‧ unit floor

21h‧‧‧ suction port

AL‧‧‧Low attraction area (1st attraction area)

AM‧‧‧Attraction area

AH‧‧ high attraction area (second attraction area)

Dc‧‧ weeks direction

Claims (8)

An apparatus for producing an absorbent body for an absorbent article, wherein the absorbent body produced includes: a first basis weight portion in which the liquid absorbent material is deposited at a first basis weight; and a liquid absorbent material having a base higher than the first basis weight The second basis weight portion of the heavy stacking device has a suction stacking device that sucks and deposits the liquid absorbing material on the suction surface by suction from a plurality of suction ports of the suction surface, and is generated in a predetermined direction. a continuous body of the continuous absorbent body; and a cutting device that cuts the continuous body of the absorbent body at a boundary position of the absorbent body that is set on the continuous body of the absorbent body at intervals in the predetermined direction, thereby generating the aforementioned In the absorber, the suction surface has a first suction region in which the intake port is formed at a first aperture ratio, and a second suction region in which the intake port is formed at a second aperture ratio higher than the first aperture ratio. The second attraction region includes the boundary position. The apparatus for manufacturing an absorbent article of an absorbent article according to claim 1, wherein the suction stacking device has a rotary drum that continuously rotates in a single direction along a circumferential direction, and an endless groove portion that extends throughout The outer peripheral surface of the rotary drum is formed circumferentially, and the liquid absorbing material is sucked and accumulated by the bottom surface as the suction surface; the discharge duct is disposed at the first predetermined position in the circumferential direction, and the liquid absorbing material is oriented The aforementioned outer peripheral surface of the aforementioned rotating drum is interspersed And the liquid transporting material which is placed in the second predetermined position in the circumferential direction, and the liquid absorbing material which is sucked and accumulated by the groove portion is used as a continuous body of the absorbent body, and is taken out from the groove portion while being transported. The depth of the groove portion is constant over the entire length of the groove portion in the width direction and the entire length in the circumferential direction. The apparatus for manufacturing an absorbent article for an absorbent article according to the second aspect of the invention, wherein the number of the intake ports per unit area of the second suction region is set to be larger than each of the first suction regions. The number of the intake ports per unit area is large, and the opening area and the opening shape of the intake port are the same in size between the first suction region and the second suction region. The apparatus for manufacturing an absorbent article of an absorbent article according to the second or third aspect of the invention, wherein the rotary drum has a cylindrical member constituting the outer peripheral surface of the rotary drum, and the cylindrical member is a plurality of divided members which are divided in the circumferential direction by a unit corresponding to the absorbent body, wherein the divided members each have a unit groove portion corresponding to the groove portion, and the plurality of the divided members are mutually The circumferential directions are arranged adjacent to each other such that the unit groove portions adjacent to each other in the circumferential direction are continuous with each other. Such as the absorbent body of the absorbent article of claim 4 In the manufacturing apparatus, the second suction region is formed to be continuous so as to straddle a boundary position between the unit groove portions adjacent to each other in the circumferential direction. The apparatus for manufacturing an absorbent article of the absorbent article according to the second or third aspect of the invention, wherein the outer peripheral surface of the conveying surface faces the outer circumference of the rotating drum The endless belt of the convolution drive, and the attraction generating mechanism that generates an attraction force on the aforementioned outer peripheral surface of the aforementioned endless belt. The apparatus for producing an absorbent article for an absorbent article according to any one of the first to third aspect, wherein the continuous body of the absorbent body is pressed in a thickness direction of the continuous body of the absorbent body The pressing device is conveyed to the cutting device by a continuous system of the absorbent body which is pressed by the rolling device. A method for producing an absorbent body for an absorbent article, wherein the absorbent body produced has a first basis weight portion in which the liquid absorbent material is deposited at a first basis weight, and a liquid absorbent material having a base higher than the first basis weight The second basis weight portion of the heavy accumulation is characterized in that the liquid absorbing material is sucked and accumulated on the suction surface by suction from a plurality of suction ports of the suction surface, and the absorber is continuous in a predetermined direction. And a step of cutting the continuous body of the absorber in a predetermined position in a predetermined direction at a boundary position of the absorber disposed on the continuous body of the absorber The step of generating the absorbent body, wherein the suction surface has a first suction region that forms the intake port at a first aperture ratio, and a second aperture ratio that is higher than the first aperture ratio to form the suction The second suction region of the gas port includes the boundary position in the second suction region.