JP2015181785A - Manufacturing device and manufacturing method for absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device and a manufacturing method capable of making a part in which emboss processing is desired low basis weight (low basis weight area) and making a high absorbent polymer ratio in a deposit of the part in which the emboss processing is desired a low ratio in an absorber.SOLUTION: The manufacturing device and the manufacturing method for an absorber deposit hydrophilic fibers and high absorbent polymers in a recess for deposition to be an absorber molding area of a fiber-laminating support to mold an absorber by suction means, the absorber molding area is partitioned by two areas of a first area for molding an absorber part where a compression part is formed by emboss processing and a second area formed so as to surround the entire circumference of the first area, the first area is formed as a projection part projecting from the bottom surface of the recess for deposition to the radial direction of a rotary drum, an absorber molding area being an absorber molding area other than the projection part and determining the bottom surface of the recess for deposition as a bottom surface is formed as the second area, and both the bottom surface of the recess for deposition and the entire projection part are formed, having air permeability to airflow caused by the suction means.

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for an absorbent body constituting an absorbent article, and more particularly to a manufacturing apparatus and a manufacturing method for forming an absorbent body by depositing hydrophilic fibers and a superabsorbent polymer (SAP).

  Absorbent articles for absorbing urine, feces, menstrual blood, etc. are used for absorbent articles such as disposable diapers, sanitary napkins, panty liners, etc., and the absorbent body generally deposits hydrophilic fibers and superabsorbent polymers. It is formed by (stacking). As an apparatus for manufacturing such an absorbent body, a rotating drum, a vacuum suction portion in the rotating drum, hydrophilic fibers and a high-absorbent polymer are placed on an air flow serving as a conveying flow and arranged on the outer peripheral surface of the rotating drum. There is known an apparatus having a supply means for supplying the deposited depression. A suction hole communicating with the vacuum suction portion is provided on the bottom surface of the deposition recess. The deposition recess in such a configuration circulates between the supply means and the vacuum suction unit, and at that time, hydrophilic fibers and a superabsorbent polymer are deposited therein. Thereafter, the absorbent body deposited and molded inside the deposition recess is separated from the supply means and the vacuum suction section, and transferred to the conveyor.

Japanese Patent No. 3248687

  By the way, in an absorbent body in which hydrophilic fibers and a superabsorbent polymer are mixed and deposited and molded, embossing is performed for the purpose of preventing the deformation of the material during use by controlling the movement of the material constituting the absorbent body. It is known to form a dot-like or linear compressed portion in the absorbent body by processing.

  However, in the absorbent body having a high blending ratio of the superabsorbent polymer, the texture (hand) of the squeezed portion that is pressed to become a high-density portion becomes a hard texture, which is caused by embossing. A big restriction | limiting may be imposed on the range of a pressing part, a formation position, etc., and the effect of the pressing part formation by embossing may not fully be brought about.

  In view of the above problems, the present invention provides a manufacturing apparatus and a manufacturing method for forming an absorbent body by depositing hydrophilic fibers and a superabsorbent polymer, and lowering the basis weight (low basis weight) of a portion where embossing is desired It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method capable of reducing the ratio of the superabsorbent polymer in the deposit of the portion where the embossing is desired.

  Incidentally, Japanese Patent No. 3248687 (hereinafter referred to as Patent Document 1) discloses a molded body manufacturing apparatus and manufacturing method configured to be able to manufacture molded bodies having partially different heights and densities. More specifically, a plurality of suction regions having a plurality of suction holes in the bottom surface portion and having different depths from the surface of the accumulation recess portion on which the raw material is sucked and deposited are formed, and the bottom surface is provided for each suction region. An apparatus and a manufacturing method for a molded body are disclosed in which a molded body having partially different heights and densities can be manufactured by changing the opening ratios of the total suction holes with respect to the portion. However, in Patent Document 1, the weight of the part where embossing is desired in the absorber (low basis weight region) and the low ratio of the superabsorbent polymer ratio in the deposit of the part where embossing is desired There is no disclosure or suggestion of a configuration that can be made possible.

According to the first aspect of the present invention, there is provided an absorbent body manufacturing apparatus for manufacturing an absorbent body in which hydrophilic fibers and a superabsorbent polymer are deposited, and a rotating drum having suction means on an inner surface thereof. A stacking support that is disposed on the outer peripheral surface of the rotating drum and is rotatably disposed with the rotating drum, and serves as an absorbent molding region for depositing hydrophilic fibers and a superabsorbent polymer. The hydrophilic fiber and the superabsorbent polymer supplied into the chamber are deposited on the absorbent molding region of the pile support by the suction means, and the absorber is molded. In the absorber manufacturing apparatus,
The absorbent body forming region is divided into two regions, a first region for forming an absorbent body portion where the compressed portion is formed by embossing, and a second region formed so as to surround the entire circumference of the first region. Partitioned,
The first region is formed as a protrusion that protrudes in the radial direction of the rotary drum from the bottom surface of the deposition recess that becomes the absorber molding region, and is an absorber molding region other than the projection, An absorber molding region having the bottom surface of the recess as a bottom surface is formed as the second region,
The bottom surface of the deposition recess and the whole of the protrusion are both formed to have air permeability with respect to the air flow provided by the suction means.
An absorber manufacturing apparatus is provided.

  That is, the invention according to claim 1 is an apparatus for manufacturing an absorbent body, and in particular, in an absorbent body manufacturing apparatus for manufacturing an absorbent body in which hydrophilic fibers and a superabsorbent polymer are deposited and molded, The absorbent body forming region of the stacking fiber support body includes a first region for forming an absorber portion where the compressed portion is formed by embossing, and a second region formed so as to surround the entire circumference of the first region. A first region that is divided into two regions and that forms an absorber portion on which a compressed portion is formed by embossing is formed as a protruding portion that protrudes in the radial direction of the rotating drum from the bottom surface of the deposition recess. In addition, an absorber molding region other than the projecting portion, the absorber molding region having the bottom surface of the deposition recess portion as a bottom surface is formed as a second region, and the bottom surface of the deposition recess portion and the entire projection portion are both together. On the inner surface of the rotating drum It is formed with a breathable to airflow caused by aspiration means. Here, “the entire protrusion” means that all surfaces including the upper surface and each side surface forming the protrusion are included, and formed on the upper surface and each side surface of the protrusion so as to provide air permeability. The arrangement and distribution of the intake holes to be performed are determined as appropriate according to design specifications and the like.

  When the hydrophilic fiber and the superabsorbent polymer are deposited on the air-permeable fiber surface using the air flow by the suction means as the transport flow, the hydrophilic fiber and the superabsorbent polymer collide with the fiber surface. Will be. At that time, most of the hydrophilic fibers that are relatively low in weight and take the form of fibers and are susceptible to the influence of the surrounding air flow remain in the collided positions and are deposited on the pile fiber surface. On the other hand, superabsorbent polymers that take a granular form and are relatively heavy per unit are susceptible to their own kinetic energy (inertia) due to the influence of the surrounding air, and a part or many of them are accumulated. It collides on the fine surface and rebounds and moves without staying at the colliding position.

  In view of this, the present invention forms the first region for forming the absorber portion where the compressed portion is formed by embossing as a protruding portion protruding in the radial direction of the rotating drum from the bottom surface of the deposition recess. In addition, an absorber molding region other than the projecting portion formed so as to surround the entire circumference of the first region, the absorber molding region having the bottom surface of the deposition recess as a bottom surface is formed as the second region. In addition, by forming both the bottom surface of the deposition recess and the entire protrusion with air permeability to the air flow provided by the suction means disposed on the inner surface of the rotary drum, While maintaining the accumulation of hydrophilic fibers on the entire surface, the superabsorbent polymer is made to collide with the protrusion and bounce off, so that a part or many of the superabsorbent polymer is in a region other than the protrusion, that is, the protrusion. Lower territory Possible to land on to. Superabsorbent polymer that collides with the fiber surface that has air permeability and has a lower height than the protrusions will also bounce off, but the colliding fiber surface will be lower than the protrusions. Therefore, most of them will re-land in a low area other than the protrusion.

  Therefore, according to the present invention having the configuration as described above, forming a portion having a low ratio of the superabsorbent polymer over the entire protrusion while maintaining the deposition of the hydrophilic fiber over the entire protrusion. That is, it is possible to reduce the weight per unit area of the protrusion (low basis weight area) and to reduce the ratio of the superabsorbent polymer in the deposit of the protrusion, and it is desired to emboss the area of such a protrusion. Corresponding to the region, even during embossing pressurization, the adhesion between superabsorbent polymers and the adhesion between superabsorbent polymer and adjacent hydrophilic fibers are suppressed, and the high pressurization and high The flexibility of the density part can be ensured, and a flexible compressed part can be formed. Moreover, an absorber can be made to exist continuously also on a protrusion part, and it also becomes possible to suppress a fall of an absorptivity. That is, according to the present invention, it is difficult to lose its shape during use, and the embossed portion is ensured to have flexibility, excellent in texture, and further capable of producing an absorbent having good absorbability.

  According to the second aspect of the present invention, the side surface of the deposition recess is formed to have air permeability with respect to the air flow provided by the suction means provided on the inner surface of the rotary drum. An apparatus for manufacturing an absorbent body according to claim 1 is provided.

  According to a third aspect of the present invention, the protruding portion protrudes from the bottom surface of the deposition recess portion to the opening surface, or protrudes outward from the bottom surface of the deposition recess portion beyond the opening surface. The manufacturing apparatus of the absorber of Claim 1 or Claim 2 formed is provided.

  According to the invention described in claim 4, the opening ratio that is a ratio of the total area of the suction holes to the whole of the first region formed as the protruding portion is 35 to 65%. An apparatus for manufacturing an absorbent body according to claim 2 is provided.

  According to invention of Claim 5, it is the air flow provided by the said attraction | suction means with which the inner surface of the said rotating drum was provided, Comprising: The air which guides a hydrophilic fiber and a superabsorbent polymer to the said dent for deposition The manufacturing apparatus of the absorber of Claim 1 or Claim 2 with which the average flow velocity in the said absorber shaping | molding area | region of a flow shall be 10-100 m / s.

According to invention of Claim 6, it is a manufacturing method of the absorber which manufactures the absorber formed by depositing a hydrophilic fiber and a superabsorbent polymer, Comprising: The hydrophilic fiber supplied in the chamber and high The absorptive polymer is deposited on the inner surface of the rotating drum and is used as an absorbent body forming region of the piled fiber support disposed on the outer peripheral surface of the rotating drum so as to be rotatable together with the rotating drum. In the manufacturing method of the absorbent body, in which the absorbent body is molded by being deposited in the recess,
The absorbent body forming region is divided into two regions, a first region for forming an absorbent body portion where the compressed portion is formed by embossing, and a second region formed so as to surround the entire circumference of the first region. The first region is formed as a protruding portion protruding in the radial direction of the rotating drum from the bottom surface of the deposition recess serving as the absorber forming region, and is an absorber forming region other than the protruding portion. Forming an absorber molding region having the bottom surface of the depression for deposition as the bottom surface as the second region,
Both the bottom surface of the deposition recess and the entire protrusion are formed with air permeability to the air flow provided by the suction means,
Guiding and depositing hydrophilic fibers and superabsorbent polymer by the suction means to the absorbent molding region of the pile support;
And a step of embossing the absorber portion molded in the first region to form a compressed portion.

  According to the invention described in each claim, there are a manufacturing apparatus and a manufacturing method for forming an absorbent body by depositing hydrophilic fibers and a superabsorbent polymer, and a basis weight of a portion where embossing is desired ( A common effect is that a manufacturing apparatus and a manufacturing method capable of reducing the ratio of the superabsorbent polymer in the deposit in the portion where embossing is desired can be provided.

It is a figure which shows one Embodiment of schematic structure of the manufacturing apparatus of the absorber which concerns on this invention. It is an expanded view of one Embodiment of the outer peripheral surface of a stacking fiber support body. It is sectional drawing of the dent part for deposition used as the suction body shaping | molding area | region of the fiber support body in the AA part shown by FIG. It is a top view of one embodiment of an absorber manufactured with a manufacturing device and a manufacturing method of an absorber concerning the present invention. It is sectional drawing of the absorber in the BB part shown by FIG. It is the schematic of the absorber shaping | molding area | region in the pile support body used for evaluation.

Hereinafter, an embodiment of an absorbent body manufacturing apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of a schematic configuration of an absorbent body manufacturing apparatus according to the present invention. The absorbent body manufacturing apparatus 1 of the embodiment shown in FIG. 1 is a so-called fiber stacking apparatus. That is, the absorbent body manufacturing apparatus 1 shown in FIG. 1 includes a rotary drum 2 having suction means on its inner surface, and a product that is disposed on the outer peripheral surface of the rotary drum 2 so as to be rotatable together with the rotary drum. The fiber support 3 having a stacking support 3 having a deposition recess 4 serving as an absorbent molding region for depositing hydrophilic fibers and a superabsorbent polymer, and is supplied into the chamber 5. The absorbent body and the superabsorbent polymer are deposited on the absorbent body forming region of the pile support 3 by suction means to form the absorbent body.

  In this embodiment, the duct 6 divides the chamber 5 to which the hydrophilic fiber and the superabsorbent polymer are supplied, and the supplied hydrophilic fiber and the superabsorbent polymer are deposited on the pile support 3. A duct 6 that leads toward the dent 4 for use, and a belt conveyor 7 that is disposed on the downstream side of the installation position of the duct 6 and separates the absorber from the dent 4 for deposition and conveys it. Further, on the downstream side of the belt conveyor 7, a pressing process for pressing the entire absorbent body released from the deposition recess 4 and an embossing process for forming a pressing part on the absorbent body are arranged. In the embodiment shown in FIG. 1, the embossing process is disposed on the downstream side of the pressing process, but the pressing process may be disposed on the downstream side of the embossing process.

  In the following, the circumferential direction of the rotating drum 2 is also simply referred to as “circumferential direction Dc”, and the width direction of the rotating drum (direction passing through the paper surface of FIG. 1) is “CD direction” or “left-right direction”. Also say. An arbitrary direction in a plane orthogonal to the CD direction is also referred to as an “MD direction”. For example, the circumferential direction Dc is a part of the MD direction, and the duct axis direction of the duct is also a part of the MD direction. The tube axis direction of the polymer discharge tube 13 described later is also a part of the MD direction.

  The rotary drum 2 has a cylindrical body that rotates and rotates clockwise as one direction around a horizontal rotation axis along the CD direction, for example. Then, by this driving rotation, the fiber stack support 3 disposed on the outer peripheral surface of the rotary drum 2 moves along with the rotary drum 2 along a predetermined circumferential path. On the outer peripheral surface of the fiber stack support 3, a plurality of deposition recesses 4 are provided at a predetermined arrangement pitch in the circumferential direction Dc, and these deposition recesses 4 are also integrated with the rotary drum 2 and described above. It moves along a predetermined circumferential path.

  The outer shape of each of the deposition recesses 4 formed on the pile support 3 is a shape corresponding to the outer shape of the absorber. In addition, a large number of intake holes are formed in the bottom surface of each of the deposition recesses 4. Therefore, the hydrophilic fibers in the chamber 5 partitioned by the duct 6 are scattered on the air flow formed in the chamber 5 by the intake air from the intake holes and are deposited in the deposition recesses 4. Thus, an absorber having a shape corresponding to the deposition recess 4 is formed in the deposition recess 4 with the circumferential direction Dc and the CD direction being the longitudinal direction and the width direction, respectively, while the deposition direction is the thickness direction. Is done.

  In addition, as shown in FIG. 1, such suction is performed in the first range S <b> 1 in which the deposition recess 4 faces the duct 6 in the circumferential direction Dc, but the deposition recess 4 faces the belt conveyor 7. In 2 range S2, it stops and is not performed. Further, in the latter second range S2, the absorber in the deposition recess 4 is sequentially released from the deposition recess 4 by the intake air from the suction box in the belt conveyor 7, whereby the belt conveyor 7 It is handed over to. Thereafter, it is conveyed by the belt conveyor 7. As a configuration example for performing such intake, the partition 8 that divides the inner circumferential space of the rotary drum 2 into zones in the circumferential direction Dc and the zone corresponding to the first category S1 that should perform intake are set to have a negative pressure. Examples include a configuration having a suction (not shown) connected to the zone. In addition, it cannot be overemphasized that the suction hole of the fiber stack support body 3 and the rotating drum 2, and the said inner peripheral side space are connected so that ventilation | gas_flowing is possible.

  Further, as in the embodiment shown in FIG. 1, a sheet-like member 9 such as a nonwoven fabric or tissue paper may be supplied onto the belt conveyor 7, and the absorbent may be delivered onto the sheet-like member. The sheet-like member becomes a core wrap, a surface sheet or the like. Here, the core wrap is one that can suppress the collapse of the absorber, and is configured as a liquid-permeable sheet that allows the liquid excrement of the wearer to pass through. Nonwoven fabrics, woven fabrics, synthetic resin films in which liquid permeation holes are formed, net-like sheets having a mesh, and the like are mentioned, but preferably they are composed of tissue or nonwoven fabric. Further, the surface sheet (top sheet) is a sheet that comes into contact with the skin of the wearer, and is configured as a liquid-permeable sheet that allows the liquid excrement of the wearer to pass through. For example, a nonwoven fabric, a woven fabric, Examples thereof include a synthetic resin film in which liquid permeation holes are formed, a net-like sheet having a mesh, and the like, but preferably a non-woven fabric. As a nonwoven fabric used as a core wrap or a top sheet, an air through nonwoven fabric, a spunbond nonwoven fabric, a point bond nonwoven fabric, a spunlace nonwoven fabric, a needle punch nonwoven fabric, a melt blown nonwoven fabric, a combination thereof (for example, SMS, etc.) and the like can be mentioned.

  Furthermore, as shown in FIG. 1, the absorber in the deposition recess 4 is sequentially released from the deposition recess 4 by the intake air from the suction box in the belt conveyor 7, and is transferred to the belt conveyor 7. Then, the absorbent body manufacturing apparatus may be configured such that the opposite side surface 11 of the absorbent body 10 is also covered with the core wrap. Further, the core wrap coated on the opposite side surface 11 of the absorbent body is placed on the outer peripheral surface of the stacking support 3 before the deposition recess 4 of the stacking support 3 moves to the chamber 5 of the duct 6. You may comprise so that it may form by supplying a sheet-like core wrap.

  The duct 6 is, for example, a tubular member having a substantially rectangular cross section disposed above the rotary drum 2, and the spray port at the lower end of the duct 6 supports the stacked fiber while the tube axis direction is directed in the vertical direction (vertical direction) in the MD direction. The upper part of the outer peripheral surface of the body 3 is covered over a predetermined range in the circumferential direction Dc. Further, hydrophilic fibers obtained by pulverizing the hydrophilic fiber sheet by the pulverizer 12 are supplied from the opening at the upper end opposite to the spraying port, whereby the chamber 5 partitioned by the duct 6 is supplied into the chamber 5. An air flow containing hydrophilic fibers is formed from the top to the bottom. Therefore, when the deposition recess 4 passes through the position of the spray port by the rotation of the rotary drum 2, hydrophilic fibers are deposited in the deposition recess 4 to form the absorber. By the way, there is a gap between the peripheral edge of the spout at the lower end of the duct 6 and the outer peripheral surface of the stacking fiber support 3 so as to be open, and the air outside the chamber is at the lower end of the duct 6. It is possible to enter the inside of the chamber through the peripheral edge of the spray port, thereby suppressing leakage of the superabsorbent polymer that has collided and bounced back to the protrusion 21 formed in the deposition recess 4 described later to the outside of the chamber. It is possible to do.

  In addition, a distal end portion of a polymer discharge pipe 13 for inserting the superabsorbent polymer into the deposition recess 4 is inserted into the chamber 5 of the duct 6. In the polymer discharge pipe 13, air mixed with the superabsorbent polymer is flowed, and the superabsorbent polymer rides on the airflow from the discharge port at the tip of the polymer discharge pipe 13 to the duct 6. It is discharged into the chamber 5. According to the earnest study by the present inventor, the shortest distance between the tip of the polymer discharge pipe 13 in the chamber 5 and the upper surface of the protrusion 21 of the deposition recess 4 described later is 100 mm or more, preferably 300 mm or more. Thus, sufficient acceleration of the superabsorbent polymer is brought about by the air flow and gravity until the superabsorbent polymer reaches the protruding portion 21 serving as the fiber stacking surface, and the superabsorbent polymer in the protruding portion 21 is brought about. Of the first region 22 formed as the projecting portion 21 can be more effectively reduced and the ratio of the superabsorbent polymer can be reduced more effectively. I found something.

  Incidentally, as the hydrophilic fiber in the present embodiment, for example, wood pulp obtained from coniferous or hardwood as a raw material (for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemisermomechanical pulp; kraft pulp, Chemical pulp such as sulfide pulp and alkali pulp; semi-chemical pulp etc.); mercerized pulp or cross-linked pulp obtained by chemically treating wood pulp; non-bagasse, kenaf, bamboo, hemp, cotton (eg cotton linter), etc. Wood pulp; Regenerated cellulose such as rayon and fibril rayon; Semi-synthetic cellulose such as acetate and triacetate, and the like. Among these, pulverized pulp is preferable because it is low in cost and easy to mold.

  Examples of the superabsorbent polymer (SAP) include polyacrylate, polysulfonate, maleate anhydride, polyacrylamide, polyvinyl alcohol, polyethylene oxide, and polyaspartate. Type, polyglutamate, polyalginate, starch, cellulose, and other superabsorbent polymers; starch-acrylic acid (salt) graft copolymer, starch-acrylonitrile copolymer saponified product, sodium carboxymethylcellulose Examples thereof include starch-based or cellulose-based superabsorbent polymers such as a cross-linked product. Among these, polyacrylate-based (particularly sodium polyacrylate-based) superabsorbent polymers are preferable. The shape of the superabsorbent polymer is particulate, and the particle size is preferably 50 to 1000 μm, more preferably 100 to 600 μm.

  By the way, in the absorbent body formed by mixing and depositing the hydrophilic fiber and the superabsorbent polymer, the movement of the material constituting the absorbent body is controlled to prevent the deformation during use (when worn). As an object, it is known to form a point-like or linear compressed portion on the absorbent body by embossing.

  However, in the absorbent body having a high blending ratio of the superabsorbent polymer, the texture (hand) of the squeezed portion that is pressed to become a high-density portion becomes a hard texture, which is caused by embossing. A big restriction | limiting may be imposed on the range of a pressing part, a formation position, etc., and the effect of the pressing part formation by embossing may not fully be brought about.

  In view of the above problems, the present invention provides a manufacturing apparatus and a manufacturing method for forming an absorbent body by depositing hydrophilic fibers and a superabsorbent polymer, and lowering the basis weight (low basis weight) of a portion where embossing is desired It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method capable of reducing the ratio of the superabsorbent polymer in the deposit of the portion where the embossing is desired.

  FIG. 2 is a development view of one embodiment of the outer peripheral surface of the stacking support in the absorbent body manufacturing apparatus according to the present invention. As can be understood from FIG. 2, the stack support 3 is formed to have a deposition recess 20 that becomes an absorbent body molding region. FIG. 3 is a cross-sectional view of a dent for deposition serving as an absorbent body forming region of the pile support in the AA portion shown in FIG. As can be understood from FIG. 3, the absorbent body forming region of the fiber stack support 3 in the absorbent body manufacturing apparatus according to the present invention is a protrusion that protrudes in the radial direction of the rotary drum 2 from the bottom surface 20 of the deposition recess 4. Absorber having the bottom surface 20 of the deposition recess 4 as a bottom surface, which is an absorber molding region other than a first region 22 formed as 21 and a protruding portion formed so as to surround the entire circumference of the first region It has two areas, the second area 23 formed as a molding area. The bottom surface 20 of the deposition recess 4 and the entire protrusion 21 are both formed to have air permeability with respect to the air flow provided by the suction means. Incidentally, in order to further improve the air permeability of the entire deposition recess 4, the side surface of the deposition recess 4 has a ventilation property against the air flow provided by the suction means provided on the inner surface of the rotary drum 2. It may be configured to be formed.

  When the hydrophilic fiber and the superabsorbent polymer are deposited on the fiber surface in the absorbent molding area having air permeability by using the air flow by the suction means as the carrier flow, the hydrophilic fiber and the high absorption are deposited on the fiber surface. It will collide with the conductive polymer. At that time, most of the hydrophilic fibers that are relatively low in weight and take the form of fibers and are susceptible to the influence of the surrounding air flow remain in the collided positions and are deposited on the pile fiber surface. On the other hand, superabsorbent polymers that take a granular form and are relatively heavy per unit are susceptible to their own kinetic energy (inertia) due to the influence of the surrounding air, and a part or many of them are accumulated. It collides on the fine surface and rebounds and moves without staying at the colliding position.

  That is, in this invention, the 1st area | region 22 which shape | molds the absorber part by which the pressing part formation by embossing is made is used as the protrusion part 21 which protrudes in the radial direction of the rotating drum 2 from the bottom face 20 of the deposition recessed part 4. The second absorber forming region that is formed and is the absorber forming region other than the projecting portion formed so as to surround the entire circumference of the first region 22 and having the bottom surface 20 of the deposition recess 4 as the bottom surface. The region 23 is formed, and both the bottom surface 20 and the entire protrusion 21 of the deposition recess 4 are air permeable to the air flow provided by the suction means disposed on the inner surface of the rotary drum 2. The superabsorbent polymer is made to collide with the protrusions and rebound while maintaining the deposition of the hydrophilic fibers on the entire protrusions 21, so that most of the superabsorbent polymers are repelled. And other areas It makes it possible to land on the region of low height than the second region 23 i.e. projecting portion that. Superabsorbent polymer that collides with the fiber surface that has air permeability and has a lower height than the protrusions will also bounce off, but the colliding fiber surface will be lower than the protrusions. Therefore, most of them will re-land in a low area other than the protrusion.

  Therefore, according to the configuration of the deposition recess 4 that is the absorbent body molding region of the fiber stack support 3 shown in FIG. 2 and FIG. 3, while maintaining the deposition of hydrophilic fibers on the entire protrusion 21, Forming a portion having a low ratio of the superabsorbent polymer over the entire protrusion 21, that is, lowering the basis weight of the protrusion (lower basis weight area) and reducing the ratio of the superabsorbent polymer in the deposit of the protrusion By making the ratio possible and making the region of the protruding portion correspond to the region where embossing is desired, even when embossing is applied, the superabsorbent polymers are fixed to each other or adjacent to the superabsorbent polymer. Adhesion with the hydrophilic fiber can be suppressed, the flexibility of the high pressure and high density portion brought about by embossing can be ensured, and a flexible compressed portion can be formed. Moreover, an absorber can exist continuously also on the protrusion part 21, and it also becomes possible to suppress a fall of an absorptivity. That is, according to the present invention, it is difficult to lose its shape during use, and the embossed portion is ensured to have flexibility, excellent in texture, and further capable of producing an absorbent having good absorbability. In the embodiment shown in FIG. 1, because the absorber released from the deposition recess 4 is pressed before embossing on the downstream side of the belt conveyor 7, In the case where two or more rows of protrusions 21 are provided in the width direction of the deposition recess 4, the width direction interval of the region corresponding to the protrusion 21 in the absorber released from the deposition recess 4. Will spread by pressing. In consideration of this, in the present embodiment, in the absorber released from the deposition recess 4, the degree of spread of the region corresponding to the protrusion 21 due to the pressing in the width direction is evaluated and analyzed and evaluated. The embossing is executed at a predetermined interval in the width direction that is grasped in advance by, for example, and derived based on these evaluation results. Moreover, in another embodiment, the width direction space | interval of the area | region corresponding to this protrusion part 21 is measured using a sensor etc. in the absorber released | separated from the dent part 4 for deposition, and based on this measured value Embossing is performed at the predetermined width direction intervals.

  By the way, according to the earnest study by the present inventors, it is possible to more effectively reduce the weight per unit area (lower basis area) and the ratio of the superabsorbent polymer in the first region 22 formed as the protruding portion 21. In order to achieve this, the protrusion 21 is formed so as to protrude from the bottom surface of the deposition recess 4 to the opening surface, or to protrude outward from the bottom surface of the deposition recess 4 beyond the opening surface. The rebound of the superabsorbent polymer (SAP) particles so that the height of the laminated portion in the region of the protruding portion 21 is relatively higher than the laminated height of the other region other than the region of the protruding portion 21 in the recessed portion. It has been found that it is more suitable to make it easier to generate. Moreover, since the 1st area | region 22 formed as the protrusion part 21 is reduced in weight, when delivering the deposit of this area to the belt conveyor 7 with the shape of the deposit maintained However, it is necessary to suppress the pressure loss when the deposit is sucked onto the belt conveyor. According to the earnest study of the present inventors, the absorber in the deposition recess 4 is received by the belt conveyor 7. By forming the protrusions 21 so that the shortest distance between the upper surface of the protrusions 21 facing each other and the surface of the belt conveyor 7 is 20 mm or less, more preferably 10 mm or less, the weight is reduced. It has also been found that the deposits in the first region can be transferred to the belt conveyor 7 while maintaining a better shape.

  Furthermore, in order to more effectively enable the reduction in the weight per unit area (lower basis area) and the reduction in the ratio of the superabsorbent polymer in the first region 22 formed as the protruding portion 21, it is formed as the protruding portion. It is more preferable that the opening ratio that is the ratio of the total area of the suction holes to the entire first region 22 is 35 to 65%, and the suction means provided on the inner surface of the rotary drum 2 It is more preferable that the average flow velocity in the absorber molding region of the resulting air flow, which leads the hydrophilic fiber and the superabsorbent polymer to the deposition recess 4, is 10 to 100 m / s. Was found.

The manufacturing method of the absorber which concerns on this invention respond | corresponds to the manufacturing method suitable for implementing directly using the manufacturing apparatus of the absorber which concerns on the above as mentioned above. That is, the manufacturing method of an absorbent body according to the present invention is a manufacturing method of an absorbent body for manufacturing an absorbent body in which hydrophilic fibers and a superabsorbent polymer are deposited, and the hydrophilicity supplied into the chamber 5 Absorption of the fiber and the superabsorbent polymer by the stacking support 3 disposed on the outer peripheral surface of the rotary drum 2 so as to be rotatable together with the rotary drum 2 by suction means provided on the inner surface of the rotary drum 2 In the method of manufacturing an absorbent body, in which the absorbent body is molded by being deposited in the deposition recess 4 which is a body molding region,
The absorbent body forming region is divided into two regions, a first region 22 for forming an absorber portion where the compressed portion is formed by embossing, and a second region 23 formed so as to surround the entire circumference of the first region 22. The first region 22 is formed as a projecting portion 21 projecting in the radial direction of the rotary drum 2 from the bottom surface 20 of the deposition recess 4 serving as an absorber molding region. An absorber molding region which is a molding region and has the bottom surface 20 of the deposition recess 4 as a bottom surface is formed as a second region 23, and the entire bottom surface 20 and the protrusion 21 of the deposition recess 4 are used as suction means. A step of guiding the hydrophilic fibers and the superabsorbent polymer to the absorbent molding region of the fiber stack support 3 by the suction means and depositing the first region 22. For the absorber part molded in And a step of forming a compressed portion performs embossing.

  FIG. 4 is a plan view of an embodiment of an absorber manufactured by the method for manufacturing an absorber according to the present invention. FIG. 5 is a cross-sectional view of the absorber in the BB part shown in FIG. The absorbent body 30 in the embodiment shown in FIGS. 4 and 5 is an absorbent body manufacturing apparatus according to the present invention, and is a manufacturing apparatus configured to manufacture the absorbent body 30 having the core wrap 31 on the upper and lower surfaces. And has an absorbent core 32 containing hydrophilic fibers and a superabsorbent polymer, and a core wrap 31 covering the absorbent core 32.

  As shown in FIGS. 4 and 5, when the surface of the absorbent core 32 on the core wrap 31 side is viewed in plan, the absorbent core 32 corresponds to the first region 22 that becomes the protruding portion 21 of the deposition recess 4. The region 33 is partitioned into the other region 34 corresponding to the second region 23 which is a region other than the protruding portion of the deposition recess 4.

  In the present embodiment, the squeezed portion 35 is a recess formed by heat embossing. In the heat embossing process, the core wrap 31 and the absorbent core 32 are heated while being compressed in the thickness direction. Thereby, the pressing part 35 which integrates the core wrap 31 and the absorptive core 32 in the thickness direction of the absorber 30 is formed as a recessed part.

  The heat embossing process is performed, for example, by a method of embossing by passing the core wrap 31 and the absorbent core 32 between an embossing roll having a patterned convex portion and a flat roll. In this method, heating at the time of compression is possible by heating the embossing roll and / or the flat roll. The shape of the convex part of the embossing roll, the arrangement pattern, and the like are formed so as to correspond to the shape, the arrangement pattern, and the like of the pressing part 35.

  The position, shape, size, and the like of the squeezing part 35 can be appropriately adjusted according to the bonding strength and the like that the squeezing part 35 should realize. In this embodiment, although the pressing part 35 is linear, a part or whole may be wave shape or zigzag curved shape. Moreover, the edge parts of the longitudinal direction of the pressing part 35 may continue, and may be cyclic | annular (for example, circular shape, an ellipse shape, a heart shape, etc.). Moreover, the pressing part 35 may be dot-like dotted with a predetermined pattern (for example, a houndstooth pattern or the like).

  As described above, according to the present invention, forming the portion having a low ratio of the superabsorbent polymer on the entire protrusion while maintaining the deposition of the hydrophilic fiber on the entire protrusion, that is, the low weight of the protrusion. By making the ratio (low basis weight area) and lowering the ratio of the superabsorbent polymer in the deposit of the protrusion, by making the area of such a protrusion correspond to the area where embossing is desired, Even during embossing pressurization, adhesion between superabsorbent polymers and adhesion between the superabsorbent polymer and the adjacent hydrophilic fibers is suppressed, ensuring the flexibility of the high pressurization and high-density parts brought about by embossing. It is possible to form a flexible squeezed part. Moreover, an absorber can be made to exist continuously also on a protrusion part, and it also becomes possible to suppress a fall of an absorptivity. That is, according to the present invention, it is difficult to lose its shape during use, and the embossed portion is ensured to have flexibility, excellent in texture, and further capable of producing an absorbent having good absorbability. In addition, the above description is an example to the last and this invention is not limited to said embodiment at all.

[Examples 1-7 and Comparative Examples 1-3]
(1) Manufacture of Absorber Wafer User's Fluff Pulp NB416 (Hydrophilic Fiber Sheet) is pulverized by a mill device and transported as hydrophilic fibers by air flow, and placed on the transport flow to be highly absorbed by Sundia Polymer Co. Polymer: IM707 was sprayed. In FIG. 6, the schematic of the absorber shaping | molding area | region in the fiber stack support body used in Examples 1-7 and Comparative Examples 1-3 is shown. A rotating fiber stack support is passed through a carrier stream (air stream) in which hydrophilic fibers and superabsorbent polymer are mixed, and the hydrophilic fiber (pulp fiber) and superabsorbent polymer are passed through the stack. It was made to deposit in the dent part for a deposition used as the absorber shaping | molding area | region. At this time, the feed rate of the hydrophilic fibers and the superabsorbent polymer was adjusted so that the average basis weight of the hydrophilic fibers in the sediment was 200 gsm and the average basis weight of the superabsorbent polymer was 220 gsm (see Table 1). By the way, the depth a (see FIG. 1) of the dent for depositing the pile support is set to 8 mm, and the protrusion serving as the first region of the absorber molding region in each of Examples 1-7 and Comparative Examples 1-3. Other than the shape of the part, the opening ratio (protrusion part opening ratio) which is the ratio of the total area of the suction holes to the entire first region formed as the protruding part of the absorber molding region, and the protruding part of the absorber molding region Table 2 shows the aperture ratio (non-projection portion aperture ratio) that is the ratio of the total area of the suction holes to the entire second area. Thereafter, the deposit on the rotating fiber stack support was transferred onto a hydrophilic nonwoven fabric as a core wrap sheet in which a hot melt adhesive was applied to the surface in contact with the deposit. Subsequently, after a hydrophilic non-woven fabric as a core wrap sheet coated with a hot melt adhesive was stacked on the opposite surface of the deposit, the thickness was compressed to about 3 mm by pressing with a pair of press rolls. Thereafter, the absorber portion deposited and molded on the protruding portion serving as the first region was pressed by embossing to form a high-density region. By the way, only for Example 7, in order to superimpose the core wrap sheet on the opposite surface of the deposit in advance, the hydrophilic fiber and the superabsorbent polymer are directly applied to the absorbent body forming region of the pile support. Rather than the direct deposition deposited on the substrate, the deposition was performed through the nonwoven fabric in which hydrophilic fibers and superabsorbent polymer were deposited on the absorbent molding region of the piled fiber support through the hydrophilic nonwoven fabric as the core wrap sheet (see Table 1). ).

  As can be understood from Table 2, in Examples 1 to 7 and Comparative Examples 1 to 3, the protruding part height b (see FIG. 3) and the protruding part tip width c (see FIG. 3), which are the first region of the absorbent body forming region. Reference), protrusion skirt width d (see FIG. 3), ratio of the total area of the suction holes to the entire first area which is the area of the protrusion (protrusion opening ratio), and absorber The basis weight of the deposits brought into the absorber molding area, each of the opening ratio (non-projecting part opening ratio) that is the ratio of the total area of the suction holes to the entire second area that is an area other than the protruding part of the molding area And the influence on the superabsorbent polymer ratio (weight ratio). And about Examples 1-7, on the other hand, it has the 1st field which serves as a projection in an absorber fabrication field, and the whole projection has air permeability. For 3, the absorber molding region has a first region that becomes a protrusion, but the entire protrusion does not have air permeability, or the absorber molding region does not have a first region that becomes a protrusion. It was.

  Incidentally, in Examples 1, 2, 5 and 6, a thin stainless steel plate having an opening area ratio of 62.9% was used for forming the absorber molding region by etching, and the protrusion opening ratio was The opening ratio of the non-projecting part was 62.9%. In Examples 3 and 4, a stainless steel wire mesh having a hole area ratio of 38.7% was used for forming the absorber molding region, In Example 7, a stainless steel wire mesh with a hole area ratio of 51.3% was used to form the absorber molding region. The projecting portion opening ratio and the non-projecting portion opening ratio were 51.3%.

  On the other hand, in the comparative example 1 which has the 1st area | region which becomes a protrusion part in an absorber shaping | molding area | region, but the whole protrusion part does not have air permeability, it is a hole area ratio 62.9% by an etching process. A stainless steel sheet with holes was used to form the absorber molding area, but a solid structure made of hard vinyl chloride resin that does not have air permeability was applied to the protrusions, and the opening ratio of the protrusions was 0%. And the non-projection part opening rate was 62.9%. Moreover, in the comparative example 2 which made object the thing which does not have the 1st area | region which becomes a protrusion part in an absorber shaping | molding area | region, it is a low hole area ratio with respect to formation of the 1st area | region used as a protrusion part. A stainless thin plate having a low hole area ratio formed by pattern etching is used. For the formation of the second region, which is normally a non-projecting region, the hole area ratio is 62.9% by etching. A stainless thin plate with a number of openings is used, and the first area opening ratio (shown as the protruding section opening ratio in Table 2), which is normally a protrusion, is set to 7.3 to 33.8%. Then, the hole area ratio (shown as the non-protruding part hole area ratio in Table 2) of the second area serving as the non-protruding part area was 62.9%. Furthermore, in Comparative Example 3, which is intended for the absorber molding region that does not have the first region serving as the projecting portion, the first region that is originally the projecting portion and the first region that is originally the non-projecting portion region. For the formation of the two regions, a stainless thin plate having an opening area ratio of 62.9% by etching is used, and the first area opening ratio (protruding in Table 2), which is normally a protruding portion, is used. And the opening ratio of the second region, which is normally a non-projecting portion area (shown as the non-projecting portion opening ratio in Table 2), was 62.9%.

(Evaluation results)
Absorbent weight and superabsorbent polymer corresponding to each of the protruding portion (first region) and the non-projecting portion (second region) of the absorbent molding region in Examples 1-7 and Comparative Examples 1-3 Table 3 shows the weight ratio (SAP weight ratio).

３．製造された異なる５つのサンプル吸収体に対しての各領域における目付を算出して、算出された目付の平均値を、各領域における目付とみなす。 As shown in Table 3, the measurement of the projected area weight per unit area, that is, the basis weight in the embossed area of the manufactured absorbent body, and the non-projected area absorbent body area, that is, the basis weight in the area other than the embossed area of the manufactured absorbent body, The following procedure was used.
1. Using a predetermined measurement punching blade, the measurement object is punched from four points in the embossing region of the manufactured absorbent body and from four points in the region other than the embossing region.
2. The weight of the measurement object punched from four locations in each of the embossed region and the region other than the embossed region is measured, and the basis weight in each region is calculated by applying the following formula.

3. The basis weight in each region for five different manufactured sample absorbers is calculated, and the average value of the calculated basis weight is regarded as the basis weight in each region.

１２．製造された異なる５つのサンプル吸収体に対しての各領域におけるＳＡＰ重量比率を算出して、その平均値を算出する。
１３．同様に下記の構成にて、保水倍率を測定する。
・パルプ0.75g＋高吸収性ポリマー0.25g
・パルプ0.5g＋高吸収性ポリマー0.5g
・パルプ0.25g＋高吸収性ポリマー0.75g
・高吸収性ポリマー1g
１４．上記データより、各保水倍率をX軸,高吸収性ポリマー構成比率をY軸にとり、グラフ化を行い、一次関数による回帰直線を求め、近似式Y=aX+bを得て、吸収体の保水倍率より、高吸収性ポリマーの構成比率が算出できる状態にする。
（測定）
１．所定の測定用打ち抜き刃を用いて、製造された吸収体のエンボス加工領域の４か所から、また、エンボス領域以外の領域の４か所から測定用被検査体を打ち抜く。実施例１〜７及び比較例１〜３においては、例えば、製品幅方向長さが１０ｍｍであり、製品長手方向に沿った長さが３０ｍｍであるような長方形形状体を測定用被検査体として打ち抜いた。
２．打ち抜かれた吸収体の親水性繊維と高吸収性ポリマーを取り出し、合計約1gとなるようにサンプルを準備する。
３．準備１〜１１と同様に上記サンプルの保水倍率を求める。
４．製造された異なる５つのサンプル吸収体に対しての各領域における保水倍率を算出して、その平均値を算出する。
５．準備１４で得られた近似式により高分子ポリマーの構成比率を求める（単位％で有効桁数0.1%の位まで）。 In addition, the protruding portion SAP weight ratio shown in Table 3, that is, the weight ratio of the superabsorbent polymer in the embossed region of the manufactured absorbent body, and the non-protruded portion SAP weight ratio, that is, other than the embossed region of the manufactured absorbent body. The measurement with the weight ratio of the superabsorbent polymer in the region was made by the following procedure.
(Preparation)
1. Cut a mesh nylon net (NBC NO-NO.250HD) into 200mm x 200mm squares.
2. Fold the nylon mesh in half, close the two sides with heat seal, and mold into a bag shape of 200mmX100mm.
3. Measure the weight of the bag (measurement digits up to 1 / 100g). ...... Weight A
4). Accurately measure 1 g of the ground pulp used for the absorber, put it in the bag, and heat seal the remaining side.
5. Measure the weight of the sample bag (measurement digits up to 1 / 100g). ...... Weight B
6). Place 1000 ml of ion exchange water in a beaker and check that the sample bag and ion exchange water are at 20 ° C. If the temperature differs by 1 ° C or more from 20 ° C, store in a temperature-controlled room and proceed to the next step after 20 ± 1 ° C.
7). The sample bag is held for 1 hour with the contents submerged in 100% ion exchange water.
8). Pull up the sample bag, put it in a clothespin, hang it and drain for 15 minutes.
9. The sample bag is dehydrated with a centrifuge. (Condition: 850rpm (150G) Time: 850rpm fixed 90 seconds)
10. Measure the weight of the sample bag (measurement digits up to 1 / 100g). ...... Weight C
11. Measure the water retention magnification with the following formula.

12 The SAP weight ratio in each region for five different manufactured sample absorbers is calculated, and the average value is calculated.
13. Similarly, the water retention magnification is measured with the following configuration.
・ Pulp 0.75g + Superabsorbent polymer 0.25g
・ Pulp 0.5g + superabsorbent polymer 0.5g
・ Pulp 0.25g + Superabsorbent polymer 0.75g
・ Super absorbent polymer 1g
14 From the above data, each water retention ratio is taken on the X axis and the superabsorbent polymer component ratio is taken on the Y axis, and graphed to obtain a regression line by a linear function to obtain an approximate expression Y = aX + b. From the magnification, the composition ratio of the superabsorbent polymer can be calculated.
(Measurement)
1. Using a predetermined measurement punching blade, the measurement object is punched from four points in the embossing region of the manufactured absorbent body and from four points in the region other than the embossing region. In Examples 1 to 7 and Comparative Examples 1 to 3, for example, a rectangular body whose length in the product width direction is 10 mm and whose length along the product longitudinal direction is 30 mm is used as the measurement object. Punched out.
2. Take out the hydrophilic fibers and the superabsorbent polymer of the punched absorber, and prepare a sample so that the total is about 1 g.
3. The water retention magnification of the sample is determined in the same manner as in preparations 1-11.
4). The water retention magnification in each area | region with respect to five manufactured different sample absorbers is calculated, and the average value is calculated.
5. The composition ratio of the high molecular weight polymer is determined by the approximate expression obtained in Preparation 14 (up to the order of 0.1% of effective digits in unit%).

Further, the product flexibility (sensory evaluation), that is, the evaluation of the absorbent texture shown in Table 3 was evaluated according to the following procedure.
1. With reference to Example 1, the absorber is laminated. However, an absorbent body having a uniform basis weight is obtained by using a breathable mesh that does not have a protruding shape. The absorbent body is disassembled from a commercial infant paper diaper, and the absorbent body is replaced to obtain a blank product. A commercially available paper diaper was used with the Moony Tape Type-M size made by Unicharm Co., Ltd., and the shape of the absorbent paper pattern was also prototyped. Ten prototypes were made. (Normally, the main parts of commercially available infant paper diapers are assembled with hot-melt adhesive, and using instant cooling spray (cold spray MG-3003 manufactured by Mikasa Co., Ltd.) etc., the hot-melt adhesive is cooled and solidified. Can be disassembled.)
2. Ten prototypes of Examples 1 to 7 and Comparative Examples 1 to 3 were made by the same diaper prototype method as the blank, and the flexibility of the diapers of Examples 1 to 7 and Comparative Examples 1 to 3 was given to 10 evaluators. A question was asked as to whether or not hardness was felt compared to the blank, and the evaluation results were summarized according to the following criteria.
The number of diapers in Examples and Comparative Examples that felt a decrease in texture compared to blank diapers.
0/10 people who felt a decrease in texture …… ○○
1 person / 10 people who felt a decrease in texture …… ○
2 to 3 people / 10 people who felt a decrease in texture …… ×
More than 4 people / 10 people who feel a decrease in texture …… ××

  Considering the texture and performance required for products, the weight ratio of the superabsorbent polymer (SAP) in the embossed region, that is, the protrusion SAP weight ratio is about 45% or less. did. As can be seen from Table 3, Examples 1-7 all met the criteria. On the other hand, the comparative examples 2 and 3 comprised without having a protrusion part in an absorber shaping | molding area | region did not satisfy | fill a reference | standard. Further, in Comparative Example 1 in which the projecting portion serving as the first region of the absorbent body molding region is a non-venting projecting portion, both the hydrophilic fiber and the superabsorbent polymer are almost deposited on the projecting portion. As a result, there was no measurement of the protrusion SAP weight ratio. By the way, in Comparative Example 1, the continuity of the absorbent body on the projecting portion is impaired due to the fact that the projecting portion serving as the first region of the absorbent body molding region is a non-venting projecting portion. In comparison with Comparative Example 1, product flexibility (sensory evaluation), that is, evaluation of the texture of the absorber was excluded from the target. On the other hand, in the present invention, both the bottom surface of the deposition recess and the entire protrusion are formed so as to have air permeability to the air flow provided by the suction means disposed on the inner surface of the rotating drum. Therefore, it is possible to suppress a decrease in absorbability without impairing the continuity of the absorber on the protruding portion. In addition, from the evaluation results shown in Table 3, when the absorber molding region has the first region that is the protrusion, preferably, the opening ratio that is the ratio of the total area of the suction holes to the entire first region , 38.7% to 62.9%, the protrusion SAP weight ratio can be reduced to about 45% or less, and 35% to 65% in consideration of measurement errors. It has been found that the projecting portion SAP weight ratio can be reduced to about 45% or less more reliably. Further, Examples 1, 2, 5 and 6 having a protruding portion opening ratio and a non-projecting portion opening ratio of 62.9%, which are the same, and the depth of 8 mm of the deposition recess portion of the pile support is Example 1 in which the protrusion height is 12 mm, Example 2 in which the protrusion height is 8 mm, and Example 5 in which the protrusion height is 6 mm with respect to a (see FIG. 1). From the evaluation results shown in Table 3 with Example 6 in which the height of the protruding portion is 4 mm, the weight reduction (lower basis area) and the high absorbency in the first region 22 formed as the protruding portion 21. In order to make it possible to reduce the polymer ratio more effectively, the protruding portion 21 protrudes from the bottom surface of the deposition recess portion 4 as in the second embodiment to the opening surface. Thus, the area of the protrusion 21 is formed by projecting outward from the bottom surface of the deposition recess 4 beyond the opening surface. The height of the deposited portion can be made relatively higher than the deposited height of the region other than the region of the projecting portion 21 in the recessed portion, so that rebound of the superabsorbent polymer (SAP) particles is easily generated. It is found that the protrusion 21 protrudes outward with a protrusion amount (4 mm) that is a half of the depth a (8 mm) of the deposition recess. It has been found that forming is even more suitable.

  As described above, according to the present invention, the first region for forming the absorber portion on which the compressed portion is formed by embossing is formed as a protruding portion protruding in the radial direction of the rotary drum from the bottom surface of the dent for deposition, An absorber molding region other than the protruding portion formed so as to surround the entire circumference of the first region, and forming an absorber molding region having the bottom surface of the deposition recess as a bottom surface, and a second region, and Embossing is desired by forming both the bottom surface of the recess for deposition and the entire protrusion with air permeability to the air flow provided by the suction means disposed on the inner surface of the rotating drum. It is possible to reduce the weight of the part (low basis weight area) and the ratio of the superabsorbent polymer in the deposit of the part where embossing is desired, making it difficult to lose shape during use. Flexibility and texture Good, further, it enables the production of an absorbent good absorber.

DESCRIPTION OF SYMBOLS 1 Absorbent body manufacturing apparatus 2 Rotating drum 3 Fiber stacking support body 4 Deposition part for deposition 21 Protrusion part 22 1st area | region 23 2nd area | region

Claims (6)

An absorbent body manufacturing apparatus for manufacturing an absorbent body by depositing hydrophilic fibers and a superabsorbent polymer, the rotary drum having suction means on the inner surface, and disposed on the outer peripheral surface of the rotary drum, A stacking support that is rotatably arranged together with the rotating drum, and has a stacking support that has an indentation for depositing that forms an absorbent body forming region in which hydrophilic fibers and a superabsorbent polymer are deposited; In the absorbent body manufacturing apparatus for forming the absorbent body by depositing the hydrophilic fiber and the superabsorbent polymer supplied into the chamber on the absorbent body molding region of the pile support by the suction means,
The absorbent body forming region is divided into two regions, a first region for forming an absorbent body portion where the compressed portion is formed by embossing, and a second region formed so as to surround the entire circumference of the first region. Partitioned,
The first region is formed as a protrusion that protrudes in the radial direction of the rotary drum from the bottom surface of the deposition recess that becomes the absorber molding region, and is an absorber molding region other than the projection, An absorber molding region having the bottom surface of the recess as a bottom surface is formed as the second region,
The bottom surface of the deposition recess and the whole of the protrusion are both formed to have air permeability with respect to the air flow provided by the suction means.
Absorber manufacturing equipment.   2. The absorber manufacturing apparatus according to claim 1, wherein a side surface of the deposition recess is formed to have air permeability with respect to an air flow provided by the suction means provided on an inner surface of the rotating drum. .   3. The protruding portion is formed to protrude from the bottom surface of the deposition recess portion to an opening surface, or to protrude outward from the bottom surface of the deposition recess portion beyond the opening surface. An absorbent body manufacturing apparatus according to claim 1.   The manufacturing apparatus for an absorbent body according to claim 1 or 2, wherein an opening ratio that is a ratio of a total area of the suction holes to the entire first region formed as the protruding portion is 35 to 65%. .   The average flow velocity in the absorber molding region of the air flow provided by the suction means provided on the inner surface of the rotating drum and guiding the hydrophilic fibers and the superabsorbent polymer to the deposition recess is as follows: The manufacturing apparatus of the absorber according to claim 1 or 2 made into 10-100 m / s. An absorbent body manufacturing method for manufacturing an absorbent body in which hydrophilic fibers and a superabsorbent polymer are deposited, wherein the hydrophilic fiber and superabsorbent polymer supplied into a chamber are disposed on an inner surface of a rotating drum. The absorbent body is molded by being deposited on the deposition recesses that serve as the absorbent body molding region of the stacking support disposed on the outer peripheral surface of the rotary drum so as to be rotatable together with the rotary drum. In the manufacturing method of the absorber,
The absorbent body forming region is divided into two regions, a first region for forming an absorbent body portion where the compressed portion is formed by embossing, and a second region formed so as to surround the entire circumference of the first region. The first region is formed as a protruding portion protruding in the radial direction of the rotating drum from the bottom surface of the deposition recess serving as the absorber forming region, and is an absorber forming region other than the protruding portion. Forming an absorber molding region having the bottom surface of the depression for deposition as the bottom surface as the second region,
Both the bottom surface of the deposition recess and the entire protrusion are formed with air permeability to the air flow provided by the suction means,
Guiding and depositing hydrophilic fibers and superabsorbent polymer by the suction means to the absorbent molding region of the pile support;
The manufacturing method of an absorber which has a step which performs embossing with respect to the absorber part shape | molded in the said 1st area | region, and forms a pressing part.

Images