A high diffusivity absorbent core production device

Abstract

The present invention relates to the field of disposable sanitary product production equipment, and in particular to a high-diffusivity absorbent core production equipment, which is used for producing absorbent cores with fast diffusion speed and high absorption efficiency, and comprises a frame, a control unit, a molding die wheel, a first unwinding unit, a second unwinding unit, a third unwinding unit, a first wood pulp fiber feeding unit, a second wood pulp fiber feeding unit, a first high molecular water-absorbent resin particle feeding unit, a second high molecular water-absorbent resin particle feeding unit and a slitting unit; the molding die wheel is rotatably arranged on the frame, a plurality of mold cavities are arranged on the circumferential surface surrounding the molding die wheel, a convex strip is convexly arranged on the bottom surface of the mold cavity, the molding die wheel comprises an air distribution chamber, a negative pressure adsorption area is formed on the molding die wheel through the air distribution chamber, and when the molding die wheel rotates, the part of the mold cavity entering the negative pressure adsorption area is connected with the air distribution chamber.

Description

Technical Field

[0001] The invention relates to the field of disposable sanitary product production equipment, in particular to a high-diffusivity absorption core production equipment. Background Art

[0002] Absorbent cores are widely used in care absorbent products such as diapers and sanitary napkins. The absorbent core should be able to retain liquid for a long time, such as overnight use of diapers, minimize back-seepage to keep the wearer dry, and avoid dirty clothes or sheets. The absorbent core that is widely used on the market is composed of a double-layer or three-layer non-woven fabric with a polymer absorbent resin material sandwiched between the two layers. The polymer absorbent resin material is spread on the upper surface of one layer of the non-woven fabric, and then composited with another layer of non-woven fabric by spraying glue. The thickness of this absorbent core is relatively thin, but the polymer absorbent resin material is not easy to fix, which can easily cause the polymer absorbent resin material to deviate or leak. At the same time, the polymer absorbent resin material absorbs water quickly, and swells after absorbing liquid, and the volume increases to more than ten times its original volume, so that the polymer absorbent resin material in the upper part is easy to hinder the liquid from seeping after preferentially absorbing liquid and swelling, which seriously affects the water absorption efficiency. Summary of the invention

[0003] Therefore, in view of the above-mentioned problems, the present invention provides a high-diffusivity absorbent core production device for producing absorbent cores with fast diffusion speed and high absorption efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-diffusivity absorbent core production device, comprising a frame, a control unit, a forming die wheel, a first unwinding unit, a second unwinding unit, a third unwinding unit, a first wood pulp fiber unloading unit, a second wood pulp fiber unloading unit, a first high molecular water-absorbing resin particle unloading unit, a second high molecular water-absorbing resin particle unloading unit and a slitting unit;

[0006] The molding die wheel is rotatably arranged on the frame, and a plurality of mold cavities are arranged on the circumferential surface surrounding the molding die wheel, and a convex strip is convexly arranged on the bottom surface of the mold cavity. The molding die wheel includes an air distribution chamber, and a negative pressure adsorption area is formed on the molding die wheel through the air distribution chamber. When the molding die wheel rotates, the part of the mold cavity entering the negative pressure adsorption area is connected with the air distribution chamber;

[0007] The first unwinding unit, the second unwinding unit, the third unwinding unit, the first wood pulp fiber unloading unit, the second wood pulp fiber unloading unit, the first high molecular water absorbent resin particle unloading unit, and the second high molecular water absorbent resin particle unloading unit are respectively arranged on the peripheral side of the forming die wheel and distributed in the negative pressure adsorption area. The first unwinding unit, the first wood pulp fiber unloading unit, the first high molecular water absorbent resin particle unloading unit, the second unwinding unit, the second wood pulp fiber unloading unit, the second high molecular water absorbent resin particle unloading unit, and the third unwinding unit are sequentially distributed along the rotation direction of the forming die wheel, and the slitting unit is arranged at the output end of the forming die wheel and the third unwinding unit.

[0008] Furthermore, the molding mold wheel also includes a driving motor, a transmission assembly, a rotating shaft, a mold wheel body, a plurality of molds and an air volume adjustment assembly. The rotating shaft is rotatably disposed on the frame, the driving motor is connected to the rotating shaft through the transmission assembly, the mold wheel body is fixedly mounted on the rotating shaft, each of the molds is evenly arranged on the circumferential surface of the mold wheel body, each of the molds has a mold cavity, the air distribution bin is rotatably disposed on the rotating shaft and distributed in the mold wheel body, the air distribution bin is provided with an exhaust port for discharging the air in the air distribution bin and an air intake port for sucking external air into the air distribution bin, the air volume adjustment assembly is disposed at the air intake port for adjusting the air flow of the air intake port, and the air intake port is connected to part of the mold cavity.

[0009] Furthermore, the air distribution bin includes a sleeve, two partitions, an arc-shaped baffle, an arc-shaped cover plate and two side plates. The sleeve is rotatably mounted on a rotating shaft. The two partitions are vertically arranged on the sleeve along the radial direction of the sleeve. The arc-shaped baffle is connected to the two partitions. The two side plates are arranged on the arc-shaped baffle and the partition and are distributed at both axial ends of the sleeve. A chamber with an opening is formed by the partition, the arc-shaped baffle and the side plates. The arc-shaped cover plate is covered at the opening of the chamber. The air intake is arranged on the arc-shaped cover plate.

[0010] Furthermore, the air volume adjustment assembly includes a fixed seat arranged on the side panel, a movable seat slidably arranged on the fixed seat, and an adjustment seat locked on the movable seat, the fixed seat is provided with a strip groove, the movable seat is provided with a threaded hole, and the fixed seat and the movable seat are locked and connected by a locking bolt passing through the strip groove and the threaded hole.

[0011] Furthermore, a groove is concavely formed on the bottom surface of the mold cavity so that the bottom surface of the mold cavity forms a stepped structure, and the bottom surface of the mold cavity has a first supporting surface, a second supporting surface, and a connecting surface connecting the first supporting surface and the second supporting surface.

[0012] Furthermore, a first adsorption hole is provided on the connection surface, and the first adsorption hole is connected to the negative pressure adsorption area.

[0013] Furthermore, the connection surface is distributed obliquely, and the inclination angle of the connection surface is 15° to 89°.

[0014] Furthermore, the first polymer water-absorbing resin particle unloading unit and the second polymer water-absorbing resin particle unloading unit both include a storage bin and a unloading roller, the circumferential surface of the unloading roller is provided with a storage trough for storing polymer water-absorbing resin particles, and the circumferential surface of the unloading roller is provided with a supporting platform that cooperates with the convex strip.

[0015] Furthermore, a second adsorption hole is provided on the side of the convex strip, and the second adsorption hole is connected to the negative pressure adsorption area.

[0016] A high-diffusivity absorbent core production device, comprising a frame, a control unit, a forming die wheel, a first unwinding unit, a second unwinding unit, a third unwinding unit, a first wood pulp fiber unloading unit, a second wood pulp fiber unloading unit, a first high molecular water-absorbing resin particle unloading unit, a second high molecular water-absorbing resin particle unloading unit and a slitting unit;

[0017] The molding die wheel is rotatably arranged on the frame, and a plurality of mold cavities are arranged on the circumferential surface surrounding the molding die wheel, and a convex strip is convexly arranged on the bottom surface of the mold cavity. The molding die wheel includes an air distribution chamber, and a negative pressure adsorption area is formed on the molding die wheel through the air distribution chamber. When the molding die wheel rotates, the part of the mold cavity entering the negative pressure adsorption area is connected with the air distribution chamber;

[0018] The first unwinding unit, the second unwinding unit, the third unwinding unit, the first wood pulp fiber unloading unit, the second wood pulp fiber unloading unit, the first high molecular water absorbent resin particle unloading unit, and the second high molecular water absorbent resin particle unloading unit are respectively arranged on the peripheral side of the forming die wheel and distributed in the negative pressure adsorption area. The first unwinding unit, the first wood pulp fiber unloading unit, the first high molecular water absorbent resin particle unloading unit, the second unwinding unit, the second high molecular water absorbent resin particle unloading unit, the second wood pulp fiber unloading unit, and the third unwinding unit are sequentially distributed along the rotation direction of the forming die wheel, and the slitting unit is arranged at the output end of the forming die wheel and the third unwinding unit.

[0019] By adopting the above-mentioned technical scheme, the beneficial effect of the present invention is as follows: the high-diffusivity absorbent core production equipment is arranged on the peripheral side of the negative pressure adsorption area of ​​the forming die wheel through the first unwinding unit, the first wood pulp fiber feeding unit, the first high molecular water-absorbent resin particle feeding unit, the second unwinding unit, the second wood pulp fiber feeding unit, the second high molecular water-absorbent resin particle feeding unit, and the third unwinding unit, and is distributed and arranged in sequence along the rotation direction of the forming die wheel, so that the structure of the production equipment is compact, the space occupied by the equipment is reduced, and the production efficiency of the core body can be improved. Furthermore, the prepared core body is fixed by the setting of wood pulp fibers and the high molecular water-absorbent resin particles are fixed by spraying glue, so that the high molecular water-absorbent resin particles are fixed to avoid deviation or leakage. At the same time, the guide groove formed on the core body can accelerate the flow and infiltration speed of the liquid, thereby improving the water absorption efficiency of the prepared core body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the gas distribution warehouse in the first embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the mold structure in the unfolded state of the molding mold wheel of the first structure in the first embodiment of the present invention;

[0023] Figure 4 is a circuit module diagram of the first embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the mold structure in the unfolded state of the molding mold wheel of the second structure in the first embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the three-dimensional structure of a mold of the second structure in the first embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the unloading roller in the first embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of a top view of a core body of the first structure in the first embodiment of the present invention;

[0028] Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure at AA in the middle;

[0029] Fig.10 is a schematic cross-sectional structural diagram of a core body of the second structure in the first embodiment of the present invention;

[0030] Fig.11 yes Fig.10 Schematic diagram of the cross-sectional structure at the middle BB;

[0031] Fig.12 1 is a schematic diagram of a top view of the core body of the third structure in the first embodiment of the present invention;

[0032] Fig.13 is a schematic diagram of the structure of the detection instrument in the first embodiment of the present invention;

[0033] Fig.14 1 is a schematic diagram of the top view of the water guide plate of the detection instrument in the first embodiment of the present invention;

[0034] Fig.15 is a structural diagram of Embodiment 2 of the present invention;

[0035] Fig.16 It is a schematic diagram of the cross-sectional structure of the core body of the second structure in the second embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0037] The embodiments of the present invention are: Embodiment 1

[0038] refer to Figures 1 to 4 As shown, a high-diffusivity absorbent core production device includes a frame, a control unit 51, a molding die wheel 52, a first unwinding unit 53, a second unwinding unit 56, a third unwinding unit 59, a first wood pulp fiber unloading unit 54, a second wood pulp fiber unloading unit 57, a first high molecular water-absorbing resin particle unloading unit 55, a second high molecular water-absorbing resin particle unloading unit 58 and a slitting unit;

[0039] The molding die wheel 52 is rotatably disposed on the frame, and a plurality of mold cavities 521 are disposed on the circumferential surface surrounding the molding die wheel 52. The bottom surface of the mold cavity 521 is convexly provided with a convex strip 522. The molding die wheel 52 includes an air distribution chamber 523, and a negative pressure adsorption area 524 is formed on the molding die wheel 52 through the air distribution chamber 523. When the molding die wheel 52 rotates, the part of the mold cavity 521 entering the negative pressure adsorption area 524 is communicated with the air distribution chamber 523.

[0040] The first unwinding unit 53, the second unwinding unit 56, the third unwinding unit 59, the first wood pulp fiber unloading unit 54, the second wood pulp fiber unloading unit 57, the first high molecular water absorbent resin particle unloading unit 55, and the second high molecular water absorbent resin particle unloading unit 58 are respectively arranged on the peripheral side of the molding die wheel 52, and are distributed in the negative pressure adsorption area 524. The first unwinding unit 53, the first wood pulp fiber unloading unit 54, the first high molecular water absorbent resin particle unloading unit 55, the second unwinding unit 56, the second wood pulp fiber unloading unit 57, the second high molecular water absorbent resin particle unloading unit 58, and the third unwinding unit 59 are sequentially distributed along the rotation direction of the molding die wheel 52, and the slitting unit is arranged at the output end of the molding die wheel 52 and the third unwinding unit 59;

[0041] The first unwinding unit 53 , the second unwinding unit 56 , the third unwinding unit 59 , the first wood pulp fiber unloading unit 54 , the second wood pulp fiber unloading unit 57 , the first polymer water-absorbing resin particle unloading unit 55 , the second polymer water-absorbing resin particle unloading unit 58 , and the molding die wheel 52 are electrically connected to the control unit 51 , respectively.

[0042] The production process of the production equipment is:

[0043] a. The top layer 11 is unrolled and conveyed by the first unwinding unit 53, and glue is applied to the upper surface of the top layer 11, and the top layer 11 is conveyed to the forming die wheel 52. A plurality of cavities 521 are provided on the circumferential surface of the forming die wheel 52, and convex strips 522 are convexly provided on the bottom surface of the cavities 521. The top layer 11 is adsorbed in the cavities 521 of the forming die wheel 52. The conveying direction of the top layer 11 is defined as the longitudinal direction, and the width direction of the top layer 11 is defined as the transverse direction;

[0044] b. The first unwinding unit 53 is connected to the control unit 51, and the start time and unwinding speed of the first unwinding unit 53 are obtained through the control unit 51. By determining the longitudinal length dimension of a single core body 1, the time taken by the first unwinding unit 53 to unwind the top layer of the longitudinal length dimension of the single core body 1 is determined, and the time taken by the first unwinding unit 53 to unwind the top layer of the longitudinal length dimension of the single core body 1 is defined as the unwinding time;

[0045] c. Obtain the unloading time in step b, and determine the rotation speed of the molding die wheel 52 by making the longitudinal length dimension of the die cavity 521 equal to the longitudinal length dimension of the single core body 1, and determine the time taken by the first unwinding unit 53 to unwind the top layer 11 of the spacing dimension between two adjacent die cavities 521, and define the time taken by the first unwinding unit 53 to unwind the top layer 11 of the spacing dimension between two adjacent die cavities 521 as the stop time;

[0046] d. Obtaining the feeding time in step b and the stopping time in step c, and intermittently adding wood pulp fibers into the mold cavity 521 of the forming mold wheel 52 through the first wood pulp fiber feeding unit 54 to form a first wood pulp fiber layer 22;

[0047] e. Obtaining the unloading time in step b and the stop time in step c, and intermittently adding polymer water absorbent resin particles into the mold cavity 521 of the molding die wheel 52 through the first polymer water absorbent resin particle unloading unit 55 to form a first polymer water absorbent resin particle layer 21, and no wood pulp fibers and polymer water absorbent resin particles are applied to the portions corresponding to the convex strips 522;

[0048] f. The middle layer 13 is unrolled and conveyed by the second unwinding unit 56, and glue is applied to the lower surface of the middle layer 13, and then the middle layer 13 is covered on the product of step e, and the top layer 11 and the middle layer 13 are bonded and connected at the convex strips 522;

[0049] g. applying glue to the upper surface of the intermediate layer 13 in step f;

[0050] h. Obtaining the feeding time in step b and the stopping time in step c, and intermittently adding wood pulp fibers into the mold cavity 521 of the forming mold wheel 52 through the second wood pulp fiber feeding unit 57 to form a second wood pulp fiber layer 32;

[0051] i. Obtaining the unloading time in step b and the stop time in step c, and intermittently adding polymer water-absorbent resin particles into the mold cavity 521 of the molding die wheel 52 through the second polymer water-absorbent resin particle unloading unit 58 to form a second polymer water-absorbent resin particle layer 31, and no wood pulp fibers and polymer water-absorbent resin particles are applied to the portions corresponding to the convex strips 522;

[0052] j. The bottom layer 12 is unrolled and conveyed by the third unwinding unit 59, and glue is applied to the lower surface of the bottom layer 12, and then the bottom layer 12 is covered on the product of step i, and the middle layer 13 and the bottom layer 12 are bonded and connected at the convex strips 522;

[0053] k. Obtain the unloading time in step b and the stopping time in step c, and use a slitting unit to cut along the area corresponding to the stopping time of the product in step j to form a single core body 1.

[0054] In addition, the longitudinal length of the core body 1 is 5 cm to 80 cm, preferably 30 cm, and the average gram weight of the polymer water-absorbing resin particles is 0.1 g / m² to 20 g / m², preferably 6 g / m².

[0055] The high-diffusivity absorbent core production equipment is provided with a first unwinding unit 53, a first wood pulp fiber unloading unit 54, a first high molecular water-absorbent resin particle unloading unit 55, a second unwinding unit 56, a second wood pulp fiber unloading unit 57, a second high molecular water-absorbent resin particle unloading unit 58, and a third unwinding unit 59 on the circumferential side of the negative pressure adsorption area 524 of the molding die wheel 52, and is distributed in sequence along the rotation direction of the molding die wheel 52, so that the structure of the production equipment is compact, the occupied space of the equipment is reduced, and the production efficiency of the core body 1 can be improved. Specifically, the control unit 51 obtains the first The start time and the unwinding speed of the first unwinding unit 53 are determined by determining the longitudinal length of the single core body 1, thereby determining the time taken by the first unwinding unit 53 to unwind the top layer of the longitudinal length of the single core body 1, and then determining the rotation speed of the molding die wheel 52, and determining the time taken by the first unwinding unit 53 to unwind the top layer of the spacing size between two adjacent mold cavities 521, so that the first unwinding unit 53, the second unwinding unit 56, and the third unwinding unit 59 are matched with the conveying speed of the molding die wheel 52 respectively, and the first wood pulp fiber unloading unit 54, the second wood pulp fiber unloading unit 57, The first polymer water-absorbent resin particle feeding unit 55 and the second polymer water-absorbent resin particle feeding unit 58 are respectively precisely positioned with the mold cavity 521 of the molding die wheel 52, and intermittent material application is achieved, thereby improving the precise feeding of wood pulp fibers and polymer water-absorbent resin particles, ensuring the uniformity of application of wood pulp fibers and polymer water-absorbent resin particles, and improving the quality of the molded core body 1. In addition, through the above-mentioned positioning method, the production efficiency of the core body 1 is improved. Furthermore, the prepared core body 1 is fixed by setting wood pulp fibers and spraying glue to fix the polymer water-absorbent resin particles, so that the polymer water-absorbent resin particles are fixed to avoid deviation or leakage. At the same time, the guide groove formed by the core body 1 can accelerate the flow and infiltration speed of the liquid, thereby improving the water absorption efficiency of the prepared core body 1.

[0056] Specifically, the molding die wheel 52 further includes a driving motor 525, a transmission assembly, a rotating shaft 526, a die wheel body 527, a plurality of molds 528 and an air volume adjustment assembly 529. The rotating shaft 526 is rotatably arranged on a frame, the driving motor 525 is connected to the rotating shaft 526 through a transmission assembly, the die wheel body 527 is fixed on the rotating shaft 526, and each of the molds 528 is evenly arranged on the circumferential surface of the die wheel body 527. Each of the molds 528 has a mold cavity 521. The air distribution chamber 523 can be The air distribution chamber 523 is rotatably arranged on the rotating shaft 526 and distributed in the mold wheel body 527. The air distribution chamber 523 is provided with an exhaust port 301 for discharging the air in the air distribution chamber 523 and an air intake port 302 for sucking the external air into the air distribution chamber 523. The air volume adjustment component 529 is arranged at the air intake port 302 to adjust the air flow of the air intake port 302. The air intake port 302 is connected with part of the mold cavity 521. The air distribution chamber 523 includes a sleeve 303, two partitions 304, an arc baffle 305, an arc The sleeve 303 is rotatably sleeved on the rotating shaft 526. The two partitions 304 are perpendicularly arranged on the sleeve 303 along the radial direction of the sleeve 303. The arc-shaped baffle 305 is connected to the two partitions 304. The two side plates 307 are arranged on the arc-shaped baffle 305 and the partition 304 and are distributed at the axial ends of the sleeve 303. A chamber 308 with an opening is formed by the partition 304, the arc-shaped baffle 305 and the side plates 307. The arc-shaped cover plate 306 is covered on the sleeve 303. At the opening of the chamber 308, the air inlet 302 is arranged on the arc cover plate 306, and the air volume adjustment component 529 includes a fixed seat 401 arranged on the side plate 307, a movable seat 402 slidably arranged on the fixed seat 401, and an adjustment seat 403 locked on the movable seat 402, the fixed seat 401 is provided with a strip groove 404, and the movable seat 402 is provided with a threaded hole 405, and the fixed seat 401 and the movable seat 402 are locked and connected by locking bolts passing through the strip groove 404 and the threaded hole 405.

[0057] The driving motor 525 drives the rotating shaft 526 through the transmission component, thereby driving the mold wheel body 527 on the rotating shaft 526 to rotate, and the mold 528 arranged on the mold wheel body 527 follows the rotation, and the top layer 11, the bottom layer 12, the middle layer 13 and other material layers are unrolled into the negative pressure adsorption area 524 of the forming mold wheel 52 to achieve adsorption and bonding, and the material layer is transported through the rotation of the forming mold wheel 52. At the same time, the unloaded wood pulp fibers and high molecular water-absorbing resin particles are adsorbed on the material layer and fixed to prevent leakage, thereby improving production stability; and the air volume adjustment component 529 is arranged at the air intake port 302 for adjusting the air flow rate of the air intake port 302, so that the adsorption force of the mold cavity 521 in the negative pressure adsorption area 524 can be adjusted, thereby improving the convenience of use.

[0058] In this embodiment, reference Figure 5 , Figure 6 and Figure 7 As shown, the bottom surface of the mold cavity 521 is concavely provided with a groove 501, so that the bottom surface of the mold cavity 521 forms a stepped structure, and the bottom surface of the mold cavity 521 has a first supporting surface 502, a second supporting surface 503 and a connecting surface 504 connecting the first supporting surface 502 and the second supporting surface 503, and the connecting surface 504 is provided with a first adsorption hole 505, and the first adsorption hole 505 is connected to the negative pressure adsorption area 524, and the connecting surface 504 is inclined, and the inclination angle of the connecting surface 504 is 15° to 89°, preferably The angle of the first polymer water-absorbing resin particle unloading unit 55 and the second polymer water-absorbing resin particle unloading unit 58 both include a storage bin 581 and a unloading roller 582. The circumferential surface of the unloading roller 582 is provided with a storage tank 583 for storing polymer water-absorbing resin particles. The circumferential surface of the unloading roller 582 is provided with a supporting platform 584 that cooperates with the convex strip 522, and is used to prepare the adsorbent. Fig.10 and Fig.11 The absorbent core shown in the figure has a first adsorption hole 505 and a second adsorption hole 506, so that when the wood pulp fibers are cut, they can be attached to the material layer of the connecting surface 504 and the side wall of the convex strip 522, thereby forming a side wall formed only by wood pulp fibers, increasing the penetration effect and improving the diversion effect of the core body 1.

[0059] In this embodiment, reference Figure 8 and Fig. 9 As shown, a high diffusibility absorbent core comprises a core body 1, wherein the core body 1 has a longitudinal direction extending along the length direction thereof and a transverse direction extending along the width direction thereof, the longitudinal length dimension of the core body 1 is 5 cm to 80 cm, preferably 30 cm, the core body 1 has a front waist region 101, a back waist region 102 and a crotch region 103 distributed in sequence along the longitudinal direction, the core body 1 has a first absorbent region 100 located on one transverse side of a transverse central axis a and a second absorbent region 200 located on the other transverse side of the transverse central axis a, the core body 1 comprises a top layer 11, a bottom layer 12 and an intermediate layer 13 distributed between the top layer 11 and the bottom layer 12, and the gram weight of the top layer 11, the bottom layer 12 and the intermediate layer 13 is 5 gsm to 30 gsm;

[0060] A first absorbent material layer is provided between the top layer 11 and the middle layer 13, the first absorbent material layer includes a first absorbent material, a second absorbent material layer is provided between the middle layer 13 and the bottom layer 12, the second absorbent material layer includes a second absorbent material, the first absorbent material layer and the second absorbent material layer both have a front edge and a rear edge distributed at both ends of the longitudinal direction and a left edge and a right edge distributed at both ends of the lateral direction, the first absorbent material includes a first polymer water-absorbent resin particle layer 21 and a first wood pulp fiber layer 22, the first wood pulp fiber layer 22 is close to the top layer 11, the second absorbent material includes a second polymer water-absorbent resin particle layer 31 and a second wood pulp fiber layer 32, the second wood pulp fiber layer 32 is close to the bottom layer 12, the first polymer water-absorbent resin particle layer 21 and the second polymer water-absorbent resin particle layer 31 have an average gram weight of 0.1g / m² to 20g / m², preferably 6 g / m², the first absorption area 100 of the first absorption material layer is provided with at least one first slit 4 free of first absorption material along the longitudinal direction, preferably one, the second absorption area 200 of the first absorption material layer is provided with at least one second slit 5 free of first absorption material along the longitudinal direction, preferably one, the first slit 4 and the second slit 5 are symmetrically distributed along the transverse central axis a of the core body 1;

[0061] The top layer 11 and the middle layer 13 are compositely connected at the first slit 4 and the second slit 5. When the first absorbent material swells, the first slit 4 of the first absorption area 100 and the second slit 5 of the second absorption area 200 form a first guide channel 6.

[0062] In the present embodiment, the top layer 11, bottom layer 12 and middle layer 13 are all water-permeable nonwoven fabrics, and certainly can also be, for example, tissue paper (air-permeable felt or wet-laid), which has a range of, for example, 5 to 100gsm, specifically a basis weight of 10 to 40gsm. The top layer 11, bottom layer 12 and middle layer 13 can also be formed by a low basis weight nonwoven web with a grammage between 5gsm and 30gsm, such as a carded nonwoven, a spunbond nonwoven or a melt-blown nonwoven and a laminate of any of these webs. For example, a melt-spun polypropylene nonwoven fabric, and has a basis weight range of about 5gsm to 20gsm. Nonwoven materials are typically inherently hydrophobic, and the top layer 11 can therefore be treated to make it hydrophilic, for example, by treating it with a surfactant or other methods known in the art. The top layer 11, bottom layer 12 and middle layer 13 can be made of the same or different materials, optionally treated in different ways to make the top layer 11 more hydrophilic than the bottom layer 12, or paper, tissue, film, woven fabric or a laminate of any of these can also be used.

[0063] The high-diffusivity absorbent core improves the absorption capacity of the core body 1 by providing a first absorbent material layer containing a first absorbent material between the top layer 11 and the middle layer 13 and a second absorbent material layer containing a second absorbent material between the bottom layer 12 and the middle layer 13. At the same time, the first absorbent material and the second absorbent material are isolated by the middle layer 13. The first absorbent material includes a first polymer water-absorbent resin particle layer 21 and a first wood pulp fiber layer 22. The first wood pulp fiber layer 22 is close to the top layer 11. The second absorbent material includes a second polymer water-absorbent resin particle layer 31 and a second wood pulp fiber layer 32. The second wood pulp fiber layer 32 is close to the bottom layer 12. After the wood pulp fibers are glued to the top layer 11 or the bottom layer 12, the softness of the top layer or the bottom layer is increased, and the thickness and bulkiness are ensured. After adding the first polymer water-absorbent resin particle layer 21 or the second polymer water-absorbent resin particle layer 31, the polymer water-absorbent resin particles are embedded in the gaps between the wood pulp fibers and are fixed to the top layer through the wood pulp fibers. Or the bottom layer constrains the polymer water-absorbent resin particles so that the polymer water-absorbent resin particles are fixed and provide sufficient expansion space for them to ensure the absorption amount of the polymer water-absorbent resin particles, and the first absorption area 100 and the second absorption area 200 of the first absorption material layer are respectively provided with a first slit 4 and a second slit 5 that do not contain the first absorption material, and the top layer 11 and the middle layer 13 are compositely connected at the first slit 4 and the second slit 5, so as to encapsulate the polymer water-absorbent resin particles and prevent excessive polymer water-absorbent resin particles from leaking to the first slit 4 and the second slit 5. When in use, liquid is absorbed by the first absorption material, and the polymer water-absorbent resin particles in the first absorption material absorb liquid and swell, so that a first guide channel 6 is formed at the first slit 4 and the second slit 5, and a part of the excess liquid seeps down to the second absorption material through the middle layer 13 and is absorbed by it, and the other part is guided to flow along the first guide channel 6, and the guide effect is good, thereby improving the diffusibility and absorption efficiency of the core body 1.

[0064] Furthermore, the first absorption zone 100 of the second absorption material layer is provided with at least one third slit 7 not containing the second absorption material along the longitudinal direction, preferably one, and the second absorption zone 200 of the second absorption material layer is provided with at least one fourth slit 8 not containing the second absorption material along the longitudinal direction, preferably one, and the bottom layer 12 and the middle layer 13 are compositely connected at the third slit 7 and the fourth slit 8. When the second absorption material swells, the third slit 7 of the first absorption zone 100 and the fourth slit 8 of the second absorption zone 200 form a second guide channel 9, and the first guide channel 6 coincides with the orthographic projection of the second guide channel 9.

[0065] When in use, the liquid is absorbed by the first absorbent material, and the polymer water-absorbent resin particles in the first absorbent material absorb the liquid and swell, so that a first guide channel 6 is formed at the first slit 4 and the second slit 5, and a part of the excess liquid seeps through the middle layer 13 to the second absorbent material and is absorbed, and the polymer water-absorbent resin particles in the second absorbent material absorb the liquid and swell, so that a second guide channel 9 is formed at the third slit 7 and the fourth slit 8, and the other part is guided to flow along the second guide channel 9, and the guide effect is good, further improving the diffusibility and absorption efficiency of the core body 1.

[0066] refer to Fig.10 and Fig.11 As shown, the longitudinal length dimension of the first absorbent material layer is smaller than that of the second absorbent material layer, the first absorbent material layer is distributed in the front waist area 101 and the crotch area 103, and the rear end of the first guide channel 6 is connected with the rear edge, so that the liquid flowing in the first guide channel 6 can overflow through the rear end into the second absorbent material layer, thereby improving the absorption speed. At the same time, the first absorbent material layer is distributed in the front waist area 101 and the crotch area 103 according to the actual use area, which can reduce the use amount of the first absorbent material and ensure that the change of the absorption amount is small, thereby improving the utilization rate of the first absorbent material and reducing the production cost.

[0067] It is disclosed above that the rear end of the first flow guiding channel 6 is communicated with the rear edge. Of course, it can also be arranged that: the front end of the first flow guiding channel 6 is communicated with the front edge.

[0068] refer to Fig.12 As shown, the number of the first slit 4, the second slit 5, the third slit 7 and the fourth slit 8 mentioned above are all one. Of course, it can also be: the first absorption area 100 of the first absorption material layer is provided with more than two first slits 4 that do not contain the first absorption material along the longitudinal direction, the second absorption area 200 of the first absorption material layer is provided with more than two second slits 5 that do not contain the first absorption material along the longitudinal direction, the first absorption area 100 of the second absorption material layer is provided with more than two third slits 7 that do not contain the second absorption material along the longitudinal direction, and the second absorption area 200 of the second absorption material layer is provided with more than two fourth slits 8 that do not contain the second absorption material along the longitudinal direction. For example, the number of the first slit 4, the second slit 5, the third slit 7 and the fourth slit 8 are all four, and they are spaced apart in the longitudinal direction, so that the formed first guide channel 6 and the second guide channel 9 can play a guiding role, and at the same time can further limit the movement of the polymer water-absorbing resin particles, improve the uniformity of the core body, and ensure the guiding effect of the core body 1.

[0069] Furthermore, the first absorbent material layer and the second absorbent material layer of the core body 1 have a pressurized absorption capacity measured under a pressure of 4.136 KPa of not less than 8.4 g / g, that is, the wood pulp fibers and the polymer water-absorbent resin particles of the core body 1 have a pressurized absorption capacity measured under a pressure of 4.136 KPa of not less than 8.4 g / g, preferably 8.4 g / g or 8.6 g / g or 8.7 g / g or even higher; the first absorbent material layer and the second absorbent material layer of the core body 1 have a water absorption speed measured under a pressure of 4.136 KPa of not more than 10 s, that is, the wood pulp fibers and the polymer water-absorbent resin particles of the core body 1 have a water absorption speed measured under a pressure of 4.136 KPa of not more than 10 s, preferably 10 s or 9 s or 8 s or even less.

[0070] refer to Fig.13 and Fig.14 As shown, the detection method:

[0071] 1. Prepare instruments:

[0072] Compact block 201: The mass of the compact block 201 is 0.4136 kg, the bottom surface of the compact block 201 is a circular structure, and an electrode is provided inside the compact block 201;

[0073] Plastic cylinder 202: the area of ​​the plastic cylinder 202 is 1000.0 mm²±0.5 mm², the height of the plastic cylinder 202 is 60.0 mm±0.5 mm, and a nylon mesh with a pore size of 36 μm is adhered to the bottom of the plastic cylinder 202;

[0074] Metal frame 203: The metal frame 203 has a filter screen;

[0075] Timer 218;

[0076] Water guide plate 204: A through hole 205 is provided in the middle of the water guide plate 204, and a water pipe joint 206 is connected to the through hole 205. Six water guide grooves 207 are concavely provided on the upper surface of the water guide plate 204 along its radial direction;

[0077] Water pumping system: The water pumping system includes a water pump 208 and a water pipe 209 connected to the water pump 208;

[0078] Water tank 210: The water tank 210 has a water storage chamber 211. A baffle plate 213 in an annular structure is provided on the upper surface of the water tank 210. A water guide chamber 212 is formed between the baffle plate 213 and the water tank 210. A water outlet hole 214 and an overflow hole 215 are provided on the upper surface of the water tank 210, which communicate with the water storage chamber 211 and the water guide chamber 212.

[0079] Bracket 216;

[0080] Lifting assembly 217;

[0081] Balance;

[0082] The water pump 208 is arranged in the water storage chamber 211, the bracket 216 is horizontally mounted on the baffle 213, the metal frame 203 is arranged on the bracket 216, and is used to place the plastic cylinder 202, the lifting component 217 is arranged on the water guide chamber 212, the water guide plate 204 is arranged at the upper end of the lifting component 217, and is distributed on the lower side of the metal frame 203, the water pipe 209 passes through the water outlet hole 214 and is connected to the water pipe joint 206 of the water guide plate 204, and the timer 218 is connected to the electrode of the pressing block 201 and the metal frame 203 through the wire 219.

[0083] 2. Testing steps:

[0084] a. Carry out the test under the standard atmospheric pressure;

[0085] b. Weigh 9.0 g of sodium chloride in a beaker, transfer it to a 1 L volumetric flask after dissolving it, dilute it with water to the scale and shake it well to prepare a 0.9% saline solution, and inject the saline solution into the water storage chamber 211 of the water tank 210;

[0086] c. Prepare 5 core bodies with an area of ​​(50±0.2) mm*(80±0.2) mm as samples, carefully extract wood pulp fibers and polymer water-absorbing resin particles from the core body 1, for example, by carefully shaking or sucking, and use a freezing spray to separate the top layer 11, the bottom layer 12 and the middle layer 13 from each other and then peel off the wood pulp fibers and the polymer water-absorbing resin particles. The samples should be kept at 21°C±2°C and 50%±20%RH for at least 24 hours to reach equilibrium;

[0087] d. Put the wood pulp fibers and polymer water-absorbing resin particles peeled off from a single sample into a plastic cylinder 202 and compact them to form a block sample. Weigh the dry sample with a balance and record it as dry weight m. 1 ;

[0088] e. Place the plastic cylinder 202 connected to the sample on the metal frame 203, and weigh the dry sample and the dry test module (plastic cylinder 202 and metal frame 203) with a balance, and record it as dry weight m 2 ;

[0089] f. Gently place the pressing block 201 on the top of the sample and let it stand for 30 seconds. Then, lift the water guide plate 204 through the lifting assembly 217 so that the water guide plate 204 is against the metal frame 203.

[0090] g. Start the water pump system and inject physiological saline into the plastic cylinder 202. When the surface of the physiological saline contacts the filter screen of the metal frame 203, the timer 218 starts. After the physiological saline completely permeates the sample, the built-in electrodes on the pressing block 201 are turned on and the timer 218 stops timing. At this time, the reading of the timer 218 is the water absorption speed of the sample.

[0091] h. After the water absorption time measurement is completed, the water pumping system continues to pump water for 10 seconds, then the water pump 208 is turned off, the water level is lowered, and the level of the physiological saline drops below the filter screen of the metal frame 203. The soaked sample begins to drain under the action of the pressing block 201. After 30 seconds of drainage, the pressing block 201 is removed, and the soaked sample and the test module are measured with a balance, which is recorded as the wet weight m 3 ;

[0092] i. Take another set of dry test modules and repeat steps d, e, f, g, and h. Use a balance to measure the wet test modules and record them as wet weight m. 4 ;

[0093] j. Calculate the pressure absorption of the sample K = (m 3 -m 2 )-(m 4 -(m 2 -m 1 ))) / m 1 ;

[0094] k. Repeat the above steps five times and take the average value. Embodiment 2

[0095] refer to Fig.15 and Fig.16 As shown, a high-diffusivity absorbent core production device includes a frame, a control unit 51, a molding die wheel 52, a first unwinding unit 53, a second unwinding unit 56, a third unwinding unit 59, a first wood pulp fiber unloading unit 54, a second wood pulp fiber unloading unit 57, a first high molecular water-absorbing resin particle unloading unit 55, a second high molecular water-absorbing resin particle unloading unit 58 and a slitting unit;

[0096] The molding die wheel 52 is rotatably disposed on the frame, and a plurality of mold cavities 521 are disposed on the circumferential surface surrounding the molding die wheel 52. The bottom surface of the mold cavity 521 is convexly provided with a convex strip 522. The molding die wheel 52 includes an air distribution chamber 523, and a negative pressure adsorption area 524 is formed on the molding die wheel 52 through the air distribution chamber 523. When the molding die wheel 52 rotates, the part of the mold cavity 521 entering the negative pressure adsorption area 524 is communicated with the air distribution chamber 523.

[0097] The first unwinding unit 53, the second unwinding unit 56, the third unwinding unit 59, the first wood pulp fiber unloading unit 54, the second wood pulp fiber unloading unit 57, the first high molecular water absorbent resin particle unloading unit 55, and the second high molecular water absorbent resin particle unloading unit 58 are respectively arranged on the peripheral side of the molding die wheel 52, and are distributed in the negative pressure adsorption area 524. The first unwinding unit 53, the first wood pulp fiber unloading unit 54, the first high molecular water absorbent resin particle unloading unit 55, the second unwinding unit 56, the second high molecular water absorbent resin particle unloading unit 58, the second wood pulp fiber unloading unit 57, and the third unwinding unit 59 are sequentially distributed along the rotation direction of the molding die wheel 52, and the slitting unit is arranged at the output end of the molding die wheel 52 and the third unwinding unit 59;

[0098] The first unwinding unit 53 , the second unwinding unit 56 , the third unwinding unit 59 , the first wood pulp fiber unloading unit 54 , the second wood pulp fiber unloading unit 57 , the first polymer water-absorbing resin particle unloading unit 55 , the second polymer water-absorbing resin particle unloading unit 58 , and the molding die wheel 52 are electrically connected to the control unit 51 , respectively.

[0099] The production process of the production equipment is:

[0100] a. The top layer 11 is unrolled and conveyed by the first unwinding unit 53, and glue is applied to the upper surface of the top layer 11, and the top layer 11 is conveyed to the forming die wheel 52. A plurality of cavities 521 are provided on the circumferential surface of the forming die wheel 52, and convex strips 522 are convexly provided on the bottom surface of the cavities 521. The top layer 11 is adsorbed in the cavities 521 of the forming die wheel 52. The conveying direction of the top layer 11 is defined as the longitudinal direction, and the width direction of the top layer 11 is defined as the transverse direction;

[0101] b. The first unwinding unit 53 is connected to the control unit 51, and the start time and unwinding speed of the first unwinding unit 53 are obtained through the control unit 51. By determining the longitudinal length dimension of a single core body 1, the time taken by the first unwinding unit 53 to unwind the top layer of the longitudinal length dimension of the single core body 1 is determined, and the time taken by the first unwinding unit 53 to unwind the top layer of the longitudinal length dimension of the single core body 1 is defined as the unwinding time;

[0102] c. Obtain the unloading time in step b, and determine the rotation speed of the molding die wheel 52 by making the longitudinal length dimension of the die cavity 521 equal to the longitudinal length dimension of the single core body 1, and determine the time taken by the first unwinding unit 53 to unwind the top layer 11 of the spacing dimension between two adjacent die cavities 521, and define the time taken by the first unwinding unit 53 to unwind the top layer 11 of the spacing dimension between two adjacent die cavities 521 as the stop time;

[0103] d. Obtaining the feeding time in step b and the stopping time in step c, and intermittently adding wood pulp fibers into the mold cavity 521 of the forming mold wheel 52 through the first wood pulp fiber feeding unit 54 to form a first wood pulp fiber layer 22;

[0104] e. Obtaining the unloading time in step b and the stop time in step c, and intermittently adding polymer water absorbent resin particles into the mold cavity 521 of the molding die wheel 52 through the first polymer water absorbent resin particle unloading unit 55 to form a first polymer water absorbent resin particle layer 21, and no wood pulp fibers and polymer water absorbent resin particles are applied to the portions corresponding to the convex strips 522;

[0105] f. The middle layer 13 is unrolled and conveyed by the second unwinding unit 56, and glue is applied to the lower surface of the middle layer 13, and then the middle layer 13 is covered on the product of step e, and the top layer 11 and the middle layer 13 are bonded and connected at the convex strips 522;

[0106] g. applying glue to the upper surface of the intermediate layer 13 in step f;

[0107] h. Obtaining the unloading time in step b and the stopping time in step c, and intermittently adding polymer water-absorbent resin particles into the mold cavity 521 of the molding die wheel 52 through the second polymer water-absorbent resin particle unloading unit 58 to form a second polymer water-absorbent resin particle layer 31;

[0108] i. Obtaining the feeding time in step b and the stopping time in step c, and intermittently adding wood pulp fibers into the mold cavity 521 of the forming die wheel 52 through the second wood pulp fiber feeding unit 57 to form a second wood pulp fiber layer 32, wherein wood pulp fibers and high molecular water-absorbing resin particles are not applied to the portions corresponding to the convex strips 522;

[0109] j. The bottom layer 12 is unrolled and conveyed by the third unwinding unit 59, and glue is applied to the lower surface of the bottom layer 12, and then the bottom layer 12 is covered on the product of step i, and the middle layer 13 and the bottom layer 12 are bonded and connected at the convex strips 522;

[0110] k. Obtain the unloading time in step b and the stopping time in step c, and use a slitting unit to cut along the area corresponding to the stopping time of the product in step j to form a single core body 1.

[0111] The above embodiment discloses that the first wood pulp fiber layer 22 is close to the top layer 11, and the second wood pulp fiber layer 32 is close to the bottom layer 12. Of course, it can also be set as: the first wood pulp fiber layer 22 is close to the top layer 11, and the second wood pulp fiber layer 32 is close to the middle layer 13. Such a design allows the first polymer water-absorbent resin particle layer 21 and the second polymer water-absorbent resin particle layer 31 to be separated by the middle layer 13 and the second wood pulp fiber layer 32, so that the expansion space of the first polymer water-absorbent resin particle layer 21 and the second polymer water-absorbent resin particle layer 31 is increased, and the second wood pulp fiber layer 32 can form a lateral diversion effect, thereby further improving the utilization rate of the polymer water-absorbent resin particles; or, the first wood pulp fiber layer 22 is close to the middle layer 13, and the second wood pulp fiber layer 32 is close to the bottom layer 12; or, the first wood pulp fiber layer 22 and the second wood pulp fiber layer 32 are both close to the middle layer 13.

[0112] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A highly diffusible absorbent core production device, characterized in that: It includes a frame, a control unit, a forming die wheel, a first unwinding unit, a second unwinding unit, a third unwinding unit, a first wood pulp fiber unloading unit, a second wood pulp fiber unloading unit, a first high molecular water absorbent resin particle unloading unit, a second high molecular water absorbent resin particle unloading unit and a slitting unit; The molding die wheel is rotatably arranged on the frame, and a plurality of mold cavities are arranged on the circumferential surface surrounding the molding die wheel, and a convex strip is convexly arranged on the bottom surface of the mold cavity. The molding die wheel includes an air distribution chamber, and a negative pressure adsorption area is formed on the molding die wheel through the air distribution chamber. When the molding die wheel rotates, the part of the mold cavity entering the negative pressure adsorption area is connected with the air distribution chamber; The first unwinding unit, the second unwinding unit, the third unwinding unit, the first wood pulp fiber unloading unit, the second wood pulp fiber unloading unit, the first polymer water-absorbing resin particle unloading unit, and the second polymer water-absorbing resin particle unloading unit are respectively arranged on the peripheral side of the molding die wheel, and are distributed in the negative pressure adsorption area. The first unwinding unit, the first wood pulp fiber unloading unit, the first polymer water-absorbing resin particle unloading unit, the second unwinding unit, the second wood pulp fiber unloading unit, the second polymer water-absorbing resin particle unloading unit, and the third unwinding unit are sequentially distributed along the rotation direction of the molding die wheel, and the slitting unit is arranged at the output end of the molding die wheel and the third unwinding unit; The molding die wheel also includes a driving motor, a transmission assembly, a rotating shaft, a die wheel body, a plurality of molds and an air volume regulating assembly. The rotating shaft is rotatably disposed on the frame, the driving motor is connected to the rotating shaft through the transmission assembly, the die wheel body is fixedly disposed on the rotating shaft, each of the molds is evenly arranged on the circumferential surface of the die wheel body, each of the molds has a mold cavity, the air distribution bin is rotatably disposed on the rotating shaft and distributed in the die wheel body, the air distribution bin is provided with an exhaust port for discharging the air in the air distribution bin and an air intake port for sucking external air into the air distribution bin, the air volume regulating assembly is disposed at the air intake port for adjusting the air flow rate of the air intake port, and the air intake port is connected to part of the mold cavity.

2. The high diffusibility absorbent core production equipment according to claim 1, characterized in that: The air distribution bin includes a sleeve, two partitions, an arc-shaped baffle, an arc-shaped cover plate and two side plates. The sleeve can be rotatably mounted on a rotating shaft. The two partitions are vertically arranged on the sleeve along the radial direction of the sleeve. The arc-shaped baffle is connected to the two partitions. The two side plates are arranged on the arc-shaped baffle and the partition and are distributed at both axial ends of the sleeve. A chamber with an opening is formed by the partition, the arc-shaped baffle and the side plates. The arc-shaped cover plate is covered at the opening of the chamber. The air intake is arranged on the arc-shaped cover plate.

3. The high diffusibility absorbent core production equipment according to claim 2, characterized in that: The air volume adjustment assembly includes a fixed seat arranged on the side panel, a movable seat slidably arranged on the fixed seat, and an adjustment seat locked on the movable seat. The fixed seat is provided with a strip groove, and the movable seat is provided with a threaded hole. The fixed seat and the movable seat are locked and connected by a locking bolt passing through the strip groove and the threaded hole.

4. The high diffusibility absorbent core production equipment according to claim 3, characterized in that: The bottom surface of the mold cavity is concavely provided with a groove, so that the bottom surface of the mold cavity forms a stepped structure. The bottom surface of the mold cavity has a first supporting surface, a second supporting surface and a connecting surface connecting the first supporting surface and the second supporting surface.

5. The high diffusibility absorbent core production equipment according to claim 4, characterized in that: The connecting surface is provided with a first adsorption hole, and the first adsorption hole is communicated with the negative pressure adsorption area.

6. The high diffusibility absorbent core production equipment according to claim 4, characterized in that: The connection surface is distributed in an inclined manner, and the inclination angle of the connection surface is 15° to 89°.

7. The highly diffusible absorbent core production equipment according to any one of claims 1 to 6, characterized in that: The first polymer water-absorbing resin particle unloading unit and the second polymer water-absorbing resin particle unloading unit both include a storage bin and a unloading roller. The circumferential surface of the unloading roller is provided with a storage trough for storing polymer water-absorbing resin particles, and the circumferential surface of the unloading roller is provided with a supporting platform that cooperates with the convex strip.

8. The high diffusibility absorbent core production equipment according to claim 7, characterized in that: A second adsorption hole is provided on the side surface of the convex strip, and the second adsorption hole is communicated with the negative pressure adsorption area.

9. A highly diffusible absorbent core production device, characterized in that: It includes a frame, a control unit, a forming die wheel, a first unwinding unit, a second unwinding unit, a third unwinding unit, a first wood pulp fiber unloading unit, a second wood pulp fiber unloading unit, a first high molecular water absorbent resin particle unloading unit, a second high molecular water absorbent resin particle unloading unit and a slitting unit; The molding die wheel is rotatably arranged on the frame, and a plurality of mold cavities are arranged on the circumferential surface surrounding the molding die wheel, and a convex strip is convexly arranged on the bottom surface of the mold cavity. The molding die wheel includes an air distribution chamber, and a negative pressure adsorption area is formed on the molding die wheel through the air distribution chamber. When the molding die wheel rotates, the part of the mold cavity entering the negative pressure adsorption area is connected with the air distribution chamber; The first unwinding unit, the second unwinding unit, the third unwinding unit, the first wood pulp fiber unloading unit, the second wood pulp fiber unloading unit, the first polymer water-absorbing resin particle unloading unit, and the second polymer water-absorbing resin particle unloading unit are respectively arranged on the peripheral side of the molding die wheel, and are distributed in the negative pressure adsorption area. The first unwinding unit, the first wood pulp fiber unloading unit, the first polymer water-absorbing resin particle unloading unit, the second unwinding unit, the second polymer water-absorbing resin particle unloading unit, the second wood pulp fiber unloading unit, and the third unwinding unit are sequentially distributed along the rotation direction of the molding die wheel, and the slitting unit is arranged at the output end of the molding die wheel and the third unwinding unit; The molding die wheel also includes a driving motor, a transmission assembly, a rotating shaft, a die wheel body, a plurality of molds and an air volume regulating assembly. The rotating shaft is rotatably disposed on the frame, the driving motor is connected to the rotating shaft through the transmission assembly, the die wheel body is fixedly disposed on the rotating shaft, each of the molds is evenly arranged on the circumferential surface of the die wheel body, each of the molds has a mold cavity, the air distribution bin is rotatably disposed on the rotating shaft and distributed in the die wheel body, the air distribution bin is provided with an exhaust port for discharging the air in the air distribution bin and an air intake port for sucking external air into the air distribution bin, the air volume regulating assembly is disposed at the air intake port for adjusting the air flow rate of the air intake port, and the air intake port is connected to part of the mold cavity.

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