JP6170308B2 - Absorber manufacturing equipment - Google Patents

Description

  The present invention relates to an absorbent body manufacturing apparatus used for absorbent articles such as sanitary napkins, incontinence pads, and disposable diapers.

  Absorbent material such as fiber material supplied along with airflow in the duct was deposited with a fiber pile as a manufacturing device for absorbent articles used in absorbent articles such as sanitary napkins, incontinence pads, and disposable diapers. There is known a method in which a laminated fiber is used as it is or coated with paper or a breathable nonwoven fabric to form an absorbent body.

For example, Patent Literature 1 discloses a main rotating drum having a main fiber recess on the peripheral surface, a main supply duct for supplying fibers to the main fiber recess, and a sub-product fiber recess smaller than the main fiber recess on the peripheral surface. There is disclosed a fiber stack manufacturing apparatus that includes a sub-rotating drum having a sub-rotating drum and a sub-supply duct that supplies fibers to a sub-stack fiber recess.
The fiber stack manufacturing apparatus has a polymer supply pipe for a water-absorbing polymer in the central portion of the main supply duct, and can supply the water-absorbing polymer from the polymer supply pipe into the main supply duct. . A partition member for regulating the flow direction of the supplied water-absorbing polymer is provided below the polymer supply pipe.

JP 2006-16727 A

However, when supplying the pulp fibers sent from the defibrator in the direction of the rotating drum, the pulp fibers flowing in the duct at the tip of the partition member that adjusts the supply direction of the water-absorbing polymer etc. arranged in the duct The fiber material may be caught, and other fibers may be entangled with the caught fiber to form a fiber lump. If such a lump is made, the flow of the absorbent material containing pulp fibers may be disturbed, and the absorbent material may be unevenly deposited in the recesses of the rotary drum of the pile manufacturing apparatus. In addition, pulp fibers may be supplied and deposited in the recesses in the form of lumps. If the absorbent material deposited in the recesses is not uniform, it may affect the absorbent performance of the absorbent body, and if a lump of fibers is deposited, it may affect the feeling of use of the completed absorbent body.
The present invention relates to solving the problem that when an absorbent material is deposited in a recess of a rotating drum, a pulp fiber lump of the absorbent material is formed at the tip of a partition member disposed in a duct.

  The present invention provides an absorbent body manufacturing apparatus in which an absorbent material including a fiber material is supplied into a duct together with an air flow, and the absorbent material is deposited in a recess disposed on a peripheral surface of a rotary drum, A partition member for adjusting the supply direction of the absorber material is disposed inside the absorber, and an absorber manufacturing apparatus having an absorber material adhesion preventing means at the tip of the partition member on the supply side of the absorber material is provided. .

  In the absorbent body manufacturing apparatus according to the present invention, the absorbent material adhesion preventing means prevents the absorbent material from lumping at the tip of the partition member so that the absorbent material can be uniformly deposited in the concave portion of the rotating drum. Thus, variation in local basis weight of the absorber is suppressed, and quality can be improved.

It is sectional drawing which showed preferable one Embodiment of the manufacturing apparatus of the absorber of this invention. (A) is the expanded partial sectional view of the manufacturing apparatus shown in FIG. 1, (b) is an expanded sectional view of the front-end | tip part of the partition member shown by the X section in (a). It is the front view which looked at the front-end | tip part of a partition member toward the downstream from the upstream of the airflow which flows in the inside of a duct. It is sectional drawing of the various hole of the absorber material adhesion prevention means distribute | arranged to the front-end | tip part of a partition member, (a) is sectional drawing which showed the hole of the rectangular cross section, (b) is toward the blowing direction. It is sectional drawing which showed the hole of the trapezoid cross section in which a hole diameter becomes wide, (c) is sectional drawing which showed the hole of the trapezoidal cross section in which a hole diameter becomes narrow toward a blowing direction.

  A preferred embodiment of an absorbent body manufacturing apparatus according to the present invention will be described below with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the absorbent body manufacturing apparatus 10 supplies an absorbent body material 54 including a fiber material through the duct 30 together with an air flow, and the concave body ( Hereinafter, it is also referred to as a concave portion for fiber stacking). A partition member 33 that adjusts the supply direction of the absorber material 54 is disposed inside the duct 30. The absorbent material 54 of the present embodiment uses pulp fibers 52 as a fiber material, and further uses a water absorbent polymer 53.

  The former stage of the production apparatus 10 is a defibrating machine 20 that defibrates a pulp sheet 51 drawn from a pulp original fabric (not shown) to obtain pulp fibers 52, and a pulp fiber 52 fed from the defibrating machine 20 into an air current. And a duct 30 serving as a route for carrying the vehicle.

  The defibrator 20 defibrates the pulp sheet 51 to obtain pulp fibers 52. For example, the casing 21, the rotary blade 22 disposed in the casing 21 and scratching the end of the pulp sheet 51, the opening 23 for taking in the pulp sheet 51 provided in the casing 21, and the opening for discharging the pulp fibers 52 Part 24.

One end 30 a of the duct 30 is connected to the opening 24 of the defibrator 20, and the other end 30 b covers a part of the outer peripheral surface of the rotating drum 42.
The duct 30 is provided with a water-absorbing polymer supply unit 31 that supplies a water-absorbing polymer 53 as an absorbent material at the center in the width direction of the flow path. A partition member 33 that regulates the flow direction of the supplied pulp fibers 52 and the water-absorbing polymer 53 is disposed in the duct 30 and below the water-absorbing polymer supply unit 31.
In the duct 30, the water absorbent polymer supply unit 31 supplies the water absorbent polymer 53 above the partition member 33. The partition member 33 regulates the flow direction of the supplied pulp fiber 52 and the water absorbent polymer 53. Accordingly, the water-absorbing polymer 53 along with the pulp fibers 52 is carried along the airflow in the duct 30 and conveyed in the direction of the rotating drum 42.

Specifically, the partition member 33 divides the flow path of the duct 30 into upper and lower parts, the pulp fiber 52 flows on the lower side of the partition member 33, and the pulp fiber 52 and the water absorbent polymer 53 are on the upper side of the partition member 33. It is intended to flow. That is, the partition member 33 bisects the flow path of the duct 30 up and down. The partition member 33 is fixed to the side wall of the duct 30.
Since the partition member 33 regulates the flow direction of the water-absorbing polymer 53 supplied to the inside of the duct 30, the pulp fibers 52 are formed in the stacking concave portion 41 by the air flow including the pulp fibers 52 that flow on the lower side of the partition member 33. A filter layer that is contained and substantially free of the water-absorbing polymer 53 can be formed. In the state in which this filter layer is formed, the absorbent material 54 is deposited by the air flow including the pulp fibers 52 and the water-absorbing polymer 53, so that the mesh plate (not shown) that becomes the bottom surface portion of the stacking concave portion 41 The water-absorbing polymer 53 does not hit directly, and the mesh plate can be prevented from being clogged by the water-absorbing polymer 53.

The rotary drum 42 serving as a fiber stacker supplies pulp fibers 52 obtained by defibration by the defibrator 20 through the duct 30 together with an air flow, deposits an absorbent material 54 having the pulp fibers 52, and has a desired shape. The absorbent body 5 is obtained as a stacked fiber body that matches the mold.
In the rotating drum 42, for example, a plurality of fiber stacking recesses 41 are formed at a predetermined interval on the peripheral surface. The absorbent material 54 (pulp fiber 52, water-absorbing polymer 53) (indicated by an arrow for the sake of convenience) that has been conveyed through the duct 30 is supplied toward the peripheral surface of the rotating drum 42, and is supplied to the concave portion 41 for fiber stacking. Is deposited.

  The rotary drum 42 has a cylindrical shape, and is rotationally driven at a peripheral speed corresponding to the production speed of the production line in the direction of arrow A in the figure by a drive device (not shown). On the outer peripheral surface of the rotating drum 42, there are concave portions 41, 41,. In the rotating drum 42, the outer portion having the fiber stacking concave portion 41 rotates in the arrow A direction, and the central portion forming the spaces B, C, and D does not rotate. The absorbent body 5 deposited in the stacking fiber depression 41 is used, for example, as an absorbent body for absorbent articles such as sanitary napkins and incontinence pads. Therefore, the shape of the concave part 41 for stacking fibers is determined according to the shape of the absorbent body 5. That is, the shape of the concave portion 41 for fiber accumulation is determined so that a convex portion or a concave portion is formed at a necessary portion of the absorbent body 5. In addition, the shape of the concave part 41 for fiber accumulation is not restricted to this, The depth may be constant and may be formed continuously along the outer peripheral surface of the rotating drum 42.

An intake fan (not shown) is connected to the rotating drum 42, and the partitioned space B in the rotating drum 42 is maintained at a negative pressure by driving the intake fan. Due to the negative pressure in the space B, an air flow is generated in the duct 30 and the absorbent material 54 from the defibrator 20 is in a scattered state. At least the bottom surface of each of the fiber stacking concave portions 41 is constituted by a mesh plate or the like as described above and has a large number of pores. While each of the concave portions 41 for stacking fibers passes through the space B maintained at a negative pressure, the pores of the mesh plate function as suction holes. The space B is located behind the portion of the rotary drum 42 covered with the duct 30. The space B generates a strong suction force in the stacking concave portion 41 passing through the portion covered with the duct 30, thereby depositing the absorbent material 54 in the stacking concave portion 41 or transporting the absorbent material 54. An air flow is generated in the duct 30. The space C may be maintained at a negative pressure in order to convey the deposit or absorber while being stably held in the stacking concave portion 41. In this case, the space C has a negative pressure level higher than the space B. Kept low.
Then, the air flow that conveys the absorber material 54 that has flowed through the duct 30 is guided toward the outer peripheral surface of the rotary drum 42 by suction from the fiber stacking recess 41 located on the space B.

  Furthermore, the manufacturing apparatus 10 includes a vacuum conveyor 70 as a transfer conveyance mechanism that releases the absorbent body 5 from the stacking concave portion 41 and transfers it to the covering sheet 9 made of water-permeable thin paper or nonwoven fabric. Although not shown, the side portions of the covering sheet 9 under the absorber 5 may be folded to cover the upper and lower surfaces of the absorber 5, and a covering mechanism that performs such an operation may be provided. In addition to the covering sheet 9, a separate sheet may be supplied to cover the upper and lower surfaces of the absorbent body 5.

The said absorber material 54 can use various things used for the absorber of absorbent articles, such as a sanitary napkin and a disposable diaper, without a restriction | limiting, The fiber material is included at least. As the fiber material, for example, short fibers of cellulose fibers such as rayon fibers and cotton fibers, short fibers of synthetic fibers such as polyethylene, and the like are used in addition to pulp fibers obtained by defibrating a pulp sheet. These fiber materials can be used alone or in combination of two or more. Further, as the absorbent material 54, a water-absorbing polymer can be further used.
The fiber material may include synthetic fiber in addition to the pulp fiber 52 described above. The synthetic fiber may be mixed in the pulp sheet 51, or the synthetic fiber may be mixed with the pulverized pulp fiber and supplied. In FIG. 1, the fiber is supplied directly from the defibrator 20 to the duct 30, but the defibrated pulp may be stored in a tank (not shown) and supplied from there to the duct 30. Synthetic fibers (short fibers) can also be supplied and mixed in this tank.

Next, the partition member 33 will be described in detail.
As shown in FIGS. 2 and 3, the absorbent material adhesion preventing means is provided at the tip 34 of the partition member 33 on the supply side (upstream side) of the absorbent material. The distal end portion 34 has a curved surface shape. For example, the cross-sectional shape of the curved surface is a semicircular shape with a radius of 3 mm.
This radius is 1 mm or more and 50 mm or less, preferably 30 mm or less, more specifically 1 mm or more and 50 mm or less, preferably 1 mm or more and 30 mm or less. If the said front-end | tip part 34 has a curved surface shape, the cross-sectional shape will not be limited to the said semicircle shape, However, Preferably it is set as a semicircle shape. By setting it as such a front-end | tip shape, the pulp fiber 52 and the water absorbing polymer 53 can be conveyed, without disturbing the airflow in the duct 30 largely. In addition, the surface of the partition member 33 is smooth so that the fibers are not caught, for example, a material that reduces the friction coefficient with the fibers is selected or the friction coefficient is reduced. Is preferred. In particular, the tip 34 of the partition member 33 is preferably processed in this way. Usually, the partition member 33 is obtained by processing a plate having a thickness of about 0.5 mm to 2.0 mm into a desired shape. For example, the wing shape is preferable as a shape that does not disturb the airflow flowing in the duct 30, but may not be a wing shape as long as it does not disturb the airflow in the duct 30. In addition, the partition member 33 may be movable with respect to the side wall of the duct 30 in the up and down direction, for example.

The absorber material adhesion preventing means 35 is means for blowing gas from the inside of the partition member 33 to the outside. Specifically, the plurality of holes 36 for blowing gas to the front end portion 34 of the partition member 33 from the inside to the outside. And a cavity 37 disposed in the width direction inside the partition member 33. The cavity 37 is constituted by a single space separated from other cavities inside the partition member 33. The plurality of holes 36 communicate with the outside through the cavity 37. The interior of the partition member 33 is generally hollow, but as shown in FIG. 2B, the cavity 37 formed in the tip 34 is separated from other cavities. It is preferable from the viewpoint that the volume of the space to be pressurized becomes small and the amount of necessary compressed air is suppressed. The plurality of holes 36 are, for example, arranged in three rows at equal intervals along the width direction of the partition member 33. The hole diameter of each hole 36 is 0.5 mm or more, preferably 1 mm or more, and 2 mm or less, preferably 1.5 mm or less, more specifically 0.5 mm or more and 2 mm or less, preferably 1 mm or more and 1.5 mm or less. And The pitch of the holes 36 is, for example, 3 mm when the hole diameter is 1 mm. From the viewpoint of the strength of the tip 34 and the processing stability during processing of the holes 36, the pitch is preferably at least twice the hole diameter. Further, in order to prevent the fiber material from adhering to the distal end portion 34, it is desirable to eject air substantially uniformly in the width direction. Therefore, it is preferable that the pitch does not exceed 5 times the hole diameter.
Moreover, the hole 36 should just be distribute | arranged to the front-end | tip part 34 area | region of the partition member 33 in which the pulp fiber 52 tends to become a lump. Further, the holes 36 may be arranged in one row along the width direction of the partition member 33, or may be arranged in a plurality of rows. When forming in multiple rows, depending on the radius and hole diameter, it may be devised to shift the arrangement position of the holes for each row, for example, shifting the half pitch for the efficiency of hole arrangement and workability It is preferable from the viewpoint.

As shown in FIG. 4A, the cross-sectional shape of the hole 36 may be a rectangular cross section in the flow direction. In this case, the hole 36 can be easily processed, and the partition member 33 can be manufactured at a low cost. In FIG. 4A, it is represented by a rectangular cross section, but it is not limited that the opening edge is cut in order to remove burrs generated during processing. Moreover, as shown in FIG.4 (b), it is good also as a trapezoid whose hole diameter becomes large as it goes outside from the cavity (refer FIG.2 (b)) side. In this case, the compressed air that is blown out easily spreads, and the area covered by one hole is increased. Furthermore, as shown in FIG.4 (c), it is good also as a trapezoid whose hole diameter becomes narrow as it goes outside from the cavity (refer FIG.2 (b)) side. In this case, the flow rate of compressed air can be increased. The inclination of the side surface of the hole 36 can be appropriately determined in the range of 0 degrees (parallel to the axis) to 60 degrees with respect to the central axis direction of the hole 36, and can be realized by the shape (tilt) of the tool used for processing.
Further, if the hole 36 is oriented in the same direction as the supply side, it is difficult to affect the fiber flow. “Towards the same direction as the supply side” means that the angle between the supply side direction and the central axis direction of the hole 36 is within 30 degrees. In addition, the supply side direction is, for example, the center C of the semicircular portion of the distal end portion 34 of the partition member 33 viewed from the longitudinal section and the center of the opening 24 of the defibrating device 20 to which the one end 30a of the duct 30 is connected. It can be determined by the connecting line. Further, if there is a hole 36 facing further upward than shown in FIG. 2B, or if there is a hole 36 facing further downward than shown in FIG. Even if fibers adhere to the tip 34, it is easy to drop. The hole facing further upward or downward than shown in FIG. 2 (b) is a case where the angle between the supply side direction and the central axis direction of the hole 36 is larger than 30 degrees, and is more than 45 degrees. preferable. From the viewpoint of preventing adhesion and removing attached fibers, the front end portion 34 of the partition member 33 faces upward with a hole 36 facing in the same direction as the supply side and an angle larger than 30 degrees with respect to the supply side direction. It is preferable to provide the hole 36 and the hole 36 facing downward at an angle larger than 30 degrees with respect to the supply side direction.

As shown in FIGS. 2 and 3, the cavity 37 is connected from both sides to a pipe 38 that passes through the wall surface of the duct 30 and supplies compressed air as the gas. A supply source (not shown) of compressed air is connected to the pipe 38. The compressed air may be compressed air supplied by a dedicated compressor or may be compressed air supplied by compressed air piping arranged in the factory. The pressure of the compressed air is determined as appropriate. For example, although it depends on the hole diameter of the hole 36 and the number of holes, in the present embodiment, 0.2 MPa or more is preferable, and 0.3 MPa or more is more preferable. Although there is no restriction | limiting in particular about an upper limit, if it is 1 Mpa or less, it will fully function. For example, it may be 0.4 MPa.
Although other compressed gas may be used as the gas blown out from the hole 36, the compressed air is excellent in terms of ease of handling, cost, and the like.

Next, the operation method of the absorber manufacturing apparatus 10 will be described below.
A pulp sheet 51 drawn from a pulp raw fabric (not shown) is defibrated by a defibrating machine 20 to become pulp fibers 52, and is introduced from the one end 30 a side of the duct 30 through the opening 24.

The pulp fiber 52 introduced into the duct 30 from the one end 30a side is supplied toward the rotating drum 42. The pulp fibers 52 supplied toward the rotary drum 42 are scattered over the entire area on the other end 30 b side and sucked and deposited on the fiber stacking recess 41 passing through the other end 30 b side of the duct 30.
In the duct 30, the water absorbent polymer 53 is supplied from the water absorbent polymer supply unit 31. The water-absorbing polymer 53 has its scattering direction regulated by the partition member 33 and is deposited on the upper side (outside the bottom) of the fiber stacking recess 41.
That is, in the rotating drum 42 shown in FIG. 2, the region below the partition member 33 in the section B is upstream in the rotation direction of the rotating drum 42. Therefore, the absorbent material 54 supplied in this region is the concave portion for stacking fibers. 41 is deposited on the bottom side. In addition, since the region above the partition member 33 in the section B is downstream in the rotation direction of the rotary drum 42, the absorbent material 54 supplied in this region is deposited on the upper side (outside the bottom) of the fiber stacking recess 41. To do.

Therefore, a filter layer that contains pulp fibers 52 and does not substantially contain the water-absorbing polymer 53 is formed in the lower one of the concave portions 41 for fiber stack disposed on the other end portion 30b side of the duct 30. Is done. Here, “substantially free of water-absorbing polymer” means not only when the water-absorbing polymer 53 is not included at all, but also to the extent that the water-absorbing polymer 53 does not cause clogging of the mesh plate due to it. This includes cases where the amount is included (the same applies hereinafter).
On the other hand, a mixed layer of the pulp fibers 52 and the water-absorbing polymer 53 is deposited on the filter layer in the upper one of the concave portions for stacking fiber 41 arranged at the discharge port of the duct 30. Therefore, in the concave portion 41 for stacking fibers, a stacking body formed by laminating the filter layer and the mixed layer is formed. This is the absorber 5.

  Next, due to the rotation of the rotating drum 42, the release of the absorbent body 5 in the stacking concave portion 41 is performed as follows when the absorbent body 5 to be released by the rotation of the rotary drum 42 moves to the vacuum conveyor 70 side. Do it. Maintaining the partitioned space D in the rotary drum 42 at a positive pressure by a pressurizing means (not shown) to blow out air from the pores in the bottom surface of the stacking concave portion 41 and suck it from the vacuum conveyor 70 side. To do.

Next, the operation of the absorber material adhesion preventing means 35 will be described. The compressed air for preventing the adhesion of fibers is ejected from the hole 36 immediately before the absorbent material 54 starts to flow through the duct 30, and the compressed air is continuously ejected during manufacture of the absorbent body. During the deposition of the absorbent material 54 in the fiber stacking recess 41, it is preferable that compressed air is continuously ejected from the hole 36 of the partition member 33. Then, the ejection is stopped immediately after the manufacture of the absorber is completed. Note that the supply of compressed air is also stopped while the manufacturing apparatus 10 is stopped.
The compressed air can be supplied intermittently. For example, ejection and stop can be repeated every few seconds. Thereby, since the usage-amount of compressed air can be reduced, cost reduction can be aimed at.
Further, the strength of injection may be changed. In this case, it is normally performed by weak injection, and when the fibers adhere to the tip portion 34, before the other fibers are entangled with the fibers to form a lump, the compressed air is injected with a strong injection pressure and attached. The fibers may be blown away.

  As described above, according to the absorbent article manufacturing apparatus 10 of the absorbent article, the absorbent material adhesion preventing means 35 can prevent the pulp fiber 52 of the absorbent material 54 from adhering to the tip 34 of the partition member 33. As a result, the pulp fibers are prevented from becoming agglomerated, and the absorbent material 54 can be uniformly deposited in the recesses of the rotating drum, and the local basis weight variation of the absorbent body 5 is suppressed, improving the quality. Can be planned.

In particular, by providing the hole 36 of the absorber material adhesion preventing means 35 at the distal end portion 34 of the partition member 33, compressed air from which the pulp fibers 52 that are to adhere to the distal end portion 34 of the partition member 33 are blown out from the hole 36. Blown away by the air current. In addition, the pulp fiber 52 is less likely to adhere to the partition member 33 because the cross-sectional shape of the partition member 33 is a wing shape and the tip portion has a curved surface shape.
For this reason, the formation of a lump of pulp fibers 52 can be prevented at the tip 34 of the partition member 33. For this reason, the lump of pulp fiber 52 does not accumulate in the concave portion 41 for stacking fiber from the tip 34 of the partition member 33. As a result, the absorbent material 54 is uniformly supplied into the stacking concave portion 41, so that the absorbent material 54 is deposited uniformly.

Moreover, the partition member 33 can form mixed layers of pulp fibers and water-absorbing polymers in various combinations, and the configuration of the absorbent body can be easily changed.
As a combination, there are many water-absorbing polymers in the lower layer (wide portion) of the absorber having a medium to high cross-sectional shape, less water-absorbing polymers in the upper layer (mid-high portion), less water-absorbing polymers in the lower layer, and water-absorbing polymers in the upper layer. Many combinations, a combination with no water-absorbing polymer in the lower layer, a combination with a large amount of water-absorbing polymer in the upper layer, a combination with no water-absorbing polymer in the lower layer and a small amount of water-absorbing polymer in the upper layer, a water-absorbing polymer in the lower layer, and a water-absorbing polymer in the upper layer A combination having no water-absorbing polymer in the lower layer, a combination having no water-absorbing polymer in the upper layer, and a combination having no water-absorbing polymer in the lower layer and the upper layer.

  As the absorber material adhesion preventing means, the tip part 34 is made of a material having a small friction coefficient, or the tip part 34 is shaped so that fibers are not easily caught, and adhesion is likely to occur at both ends of the partition member 33 in the width direction. In consideration of the tendency, the center part in the width direction of the duct 30 of the partition member 33 may have a curved shape that is slightly recessed toward the rotating drum 42 side. Moreover, it is also preferable to connect the side wall of the duct 33 and the front-end | tip part 34 with a curved surface with a curvature radius of 10 mm or more and 30 mm or less. In these cases, it is not necessary to arrange the hole 36 in the distal end portion 34, but it is possible to arrange it. As processing for reducing the friction coefficient, for example, it can be produced by applying precision finish polishing such as buffing only to the tip portion 34.

  The absorbent body 5 manufactured by the absorbent body manufacturing apparatus 10 of the present invention is preferably used as an absorbent body of an absorbent article. The absorbent article is mainly used to absorb and retain body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. To do.

  Using the absorbent body manufacturing apparatus 10 described above, the absorbent body 5 disposed in the absorbent article is manufactured. The absorbent body 5 is wrapped with a covering sheet 9 and cut to a predetermined length, and intermittently between a continuous body of liquid-permeable top sheet and a continuous body of liquid-impermeable or hardly-permeable back sheet. The absorbent article is manufactured by arranging and sandwiching it into individual absorbent articles and cutting them into individual absorbent articles.

  The following absorbent body manufacturing apparatus and absorbent article manufacturing method are disclosed with respect to the above-described embodiment.

<1>
An absorber manufacturing apparatus for supplying an absorber material including a fiber material into a duct together with an air flow and depositing the absorber material in a recess disposed on a peripheral surface of a rotating drum,
A partition member for adjusting the supply direction of the absorber material is arranged inside the duct,
The absorber manufacturing apparatus which has an absorber material adhesion prevention means in the front-end | tip part of the said absorber material supply side of the said partition member.
<2>
The absorber manufacturing apparatus according to <1>, wherein the absorber material adhesion preventing means includes means for blowing air from the inside of the partition member to the tip portion.
<3>
The absorber according to <1> or <2>, wherein the partition member has a cavity inside the tip portion, and a plurality of holes penetrating the tip portion from the cavity to the outside are arranged. Manufacturing equipment.
<4>
The apparatus for manufacturing an absorber according to <3>, wherein compressed air is continuously ejected from the holes of the partition member while the absorber material is deposited in the recess.

<5>
The manufacturing apparatus includes a defibrator that defibrates a pulp sheet drawn from a pulp raw material to obtain pulp fibers, and the duct has one end connected to an opening of the defibrator, The apparatus for manufacturing an absorbent body according to any one of <1> to <4>, wherein an end portion covers a part of the outer peripheral surface of the rotating drum.
<6>
The duct is provided with a water-absorbing polymer supply section for supplying a water-absorbing polymer at a central portion in the width direction of the flow path, and the partition member regulates the flow direction of the supplied pulp fibers and the water-absorbing polymer. The absorber manufacturing apparatus according to any one of <1> to <5>.
<7>
The said partition member is a manufacturing apparatus of the absorber of any one of said <1> to <6> currently fixed to the side wall of the said duct.
<8>
The apparatus for manufacturing an absorbent body according to any one of <1> to <7>, wherein the tip end portion of the partition member has a curved shape.
<9>
The radius of the cross-sectional shape of the curved surface of the tip portion is 1 mm or more and 50 mm or less, preferably 30 mm or less, more specifically 1 mm or more and 50 mm or less, preferably 1 mm or more and 30 mm or less. Absorber manufacturing equipment.
<10>
The cross-sectional shape of the said front-end | tip part of the said partition member is a manufacturing apparatus of the absorber as described in said <8> or <9> which is a semicircle shape.
<11>
The absorber according to any one of <3> to <10>, wherein the cavity on the distal end side of the partition member is configured by a single space separated from other cavities inside the partition member. Manufacturing equipment.
<12>
The hole diameter is 0.5 mm or more, preferably 1 mm or more, and 2 mm or less, preferably 1.5 mm or less, more specifically 0.5 mm or more and 2 mm or less, preferably 1 mm or more and 1.5 mm or less. The manufacturing apparatus for an absorbent body according to any one of <3> to <11>.
<13>
The said hole is a manufacturing apparatus of the absorber of any one of said <3> to <12> currently distribute | arranged to 1 row or multiple rows along the width direction of a partition member.
<14>
The cross-sectional shape of the hole is the absorbent body manufacturing apparatus according to any one of <3> to <13>, wherein a cross section in a flow direction is a rectangular cross section.
<15>
The manufacturing apparatus for an absorbent body according to any one of <3> to <14>, wherein the cross-sectional shape of the hole is a trapezoid having a hole diameter that increases from the cavity side toward the outside.
<16>
The apparatus for manufacturing an absorbent body according to any one of <3> to <15>, wherein the cross-sectional shape of the hole is a trapezoid in which the hole diameter becomes narrower from the cavity side toward the outside.
<17>
The tip 34 of the partition member 33 has a hole facing in the same direction as the supply side, a hole facing upward at an angle larger than 30 degrees with respect to the supply side direction, and a supply side direction. The manufacturing apparatus for an absorbent body according to any one of <3> to <16>, further including a hole facing downward at an angle larger than 30 degrees.
<18>
The absorber manufacturing apparatus according to any one of <1> to <17>, wherein the tip portion is made of a material having a small friction coefficient.
<19>
The apparatus for manufacturing an absorbent body according to any one of <1> to <18>, wherein the partition member has a curved shape in which a central portion in the width direction of the duct is recessed toward the rotating drum.

<20>
The manufacturing method of an absorbent article which has the process of manufacturing an absorber using the manufacturing apparatus of the absorber of any one of said <1> to <19>.
<21>
The method for producing an absorbent article according to <20>, wherein the absorbent article is a disposable diaper, a sanitary napkin, an incontinence pad, or a panty liner.
<22>
The absorbent body is wrapped with a covering sheet, cut to a predetermined length, and intermittently disposed between a continuous body of liquid-permeable top sheet and a continuous body of liquid-impermeable or hardly-permeable back sheet. And the manufacturing method of the absorbent article as described in said <20> or <21> which is clamped and cut | disconnected to an individual absorbent article, and an absorbent article manufactures.

DESCRIPTION OF SYMBOLS 5 Absorber 9 Cover sheet 10 Absorber manufacturing apparatus 20 Defibrating machine 21 Casing 22 Rotating blade 23, 24 Opening part 30 Duct 30a One end part 30b Other end part 31 Water-absorbing polymer supply part 33 Partition member 34 Tip part 35 Absorber material Adhesion prevention means 36 hole 37 cavity 38 piping 41 concave portion for fiber stack 42 rotating drum 51 pulp sheet 52 pulp fiber 53 water absorbent polymer 70 vacuum conveyor

Claims (4)

An absorber manufacturing apparatus for supplying an absorber material including a fiber material into a duct together with an air flow and depositing the absorber material in a recess disposed on a peripheral surface of a rotating drum,
A partition member for adjusting the supply direction of the absorber material is arranged inside the duct,
Possess an absorber material adhesion preventing means to the distal end portion of the supply side of the absorbent material of the partition member,
The partition member has a cavity inside the distal end portion side, and a plurality of holes penetrating outside from the cavity are arranged in the distal end portion,
Wherein the cavity of the front end portion of the partition member, the partition in the switching member inside that has the other cavity is constituted by separated single space absorber manufacturing apparatus.   The absorber manufacturing apparatus according to claim 1, wherein the absorber material adhesion preventing means includes means for blowing air from the inside of the partition member to the tip portion. The apparatus for manufacturing an absorber according to claim 1 or 2 , wherein compressed air is continuously ejected from the hole of the partition member while the absorber material is deposited in the recess. Using an absorbent body manufacturing apparatus according to any one of claims 1 to 3, the manufacturing method of an absorbent article having a step of producing the absorbent body.

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