CN116473757B

CN116473757B - Production method, production line and sanitary article of soft composite core body capable of being absorbed repeatedly

Info

Publication number: CN116473757B
Application number: CN202310722545.2A
Authority: CN
Inventors: 周峰; 周彧峰; 聂志强; 张谭妹; 康涵鑫; 庞兵
Original assignee: Lule Health Technology Co Ltd
Current assignee: Lule Health Technology Co Ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-09-19
Anticipated expiration: 2043-06-19
Also published as: CN116473757A

Abstract

The invention relates to the field of absorption cores, in particular to a production method, a production line and sanitary articles of a soft composite core capable of being absorbed repeatedly, and the production method of the composite absorption core capable of being absorbed repeatedly comprises the following steps: s1, fibrillating a fiber material; s2, forming a single layer on the fibrillated fiber material through first carding; s3, forming a bonding layer on the surface of the single layer through secondary carding, wherein the single layer and the bonding layer form an integrated fluffy layer; s4, bonding a lower surface layer on the bottom surface of the fluffy layer; s5, spraying hot air to the local position of the surface of the bonding layer to enable the bonding layer to be locally deformed to form a containing structure; s6, sequentially adding a plurality of water absorbing materials into the accommodating structure to form a composite water absorbing layer; s7, bonding an upper surface layer on the surface of the fluffy layer to form a composite fiber net; s8, carrying out hot air reinforcement and slitting on the composite fiber net to form a composite absorption core body capable of absorbing for multiple times. The problem that the traditional fluffy layer manufacturing and the composite absorption core body manufacturing can not be simultaneously produced on line is solved.

Description

Production method, production line and sanitary article of soft composite core body capable of being absorbed repeatedly

Technical Field

The invention relates to the field of sanitary product production methods and equipment, in particular to a production method of a soft composite core body capable of being absorbed repeatedly, a production line and sanitary products.

Background

The conventional common disposable sanitary articles generally comprise diaper, paper diaper, sanitary towel and the like. The disposable sanitary articles are widely applicable, are popular for different people, and particularly bring more convenience to the service industry, and greatly reduce the time required by repeated cleaning and washing in the past. The service efficiency is improved, and meanwhile, the user is more comfortable and clean. With the development of disposable sanitary products, the existing disposable sanitary products are convenient to wear and small in volume, and can still keep comfort to skin after absorbing certain liquid, and the cost is far lower than that of a repeatedly used substitute along with the maturation of the process. The substitute which needs to be cleaned repeatedly consumes resources, and meanwhile, a certain air drying period and space are needed, so that the disposable sanitary product has a good market environment certainly compared with the disposable sanitary product which can be replaced directly after being used.

The disposable sanitary article needs to be provided with the composite absorption core body which is a core component of the absorption effect of the disposable sanitary article, and the effective duration and the use comfort degree of the disposable sanitary article are determined. The main structure of the common composite absorbent core is as follows: the five-layer sandwich structure is formed by a surface layer material, water-absorbent resin, non-woven fabric, water-absorbent resin and a bottom layer material. However, under the dual influence of the self characteristic of the water-absorbing material and the structural characteristic of the non-woven fabric carrier in the prior art, part of the water-absorbing material, such as the water-absorbing resin material, has poor bonding effect with the non-woven fabric carrier, so that the water-absorbing material can only stay on the surface layer of the non-woven fabric carrier when added in production, and certain jumping displacement is generated in the production process, so that the water-absorbing material cannot be uniformly and firmly distributed and stay on the non-woven fabric carrier, and the water-absorbing material cannot form effective interpenetration with the non-woven fabric, so that the composite absorbent core is easy to generate gel blocking, and the repeated liquid absorption performance of the composite absorbent core is reduced.

Disclosure of Invention

The invention aims to overcome at least one defect of the prior art, and provides a production method, a production line and a sanitary article of a soft composite core body capable of absorbing multiple times, which are used for solving the problems that the production of the traditional fluffy layer and the production of the composite absorbent core body are required to be carried out independently and the combination effect of partial water absorbing materials and a non-woven fabric carrier is poor.

The technical scheme adopted by the invention is that the production method of the composite absorption core body capable of absorbing for multiple times comprises the following steps:

s1, fibrillating a fiber material;

s2, forming a single layer on the fibrillated fiber material through first carding;

s3, forming a combined layer on the surface of the single layer through second carding, wherein the single layer and the combined layer form an integrated fluffy layer;

s4, bonding a lower surface layer on the bottom surface of the fluffy layer;

s5, spraying hot air to the local position of the surface of the bonding layer to enable the bonding layer to be locally deformed to form a containing structure;

s6, sequentially adding a plurality of water absorbing materials into the accommodating structure to form a composite water absorbing layer;

s7, bonding an upper surface layer on the surface of the fluffy layer to form a composite fiber web;

s8, carrying out hot air reinforcement and slitting on the composite fiber net to form a composite absorption core body capable of absorbing for multiple times.

In the process from after step S4 to before step S7, the method further includes: and continuously applying adsorption negative pressure to the lower surface layer and the fluffy layer, and enabling at least the bonding layer to be under the action of the adsorption negative pressure.

In the process from the step S4 to the step S7, the method further includes the steps of: the bonded fluffy layer and the lower surface layer move obliquely from low to high to form a composite water-absorbing layer.

The step S6 includes a step S62: at least three water-absorbent resin materials are sequentially added into the accommodating structure on the moving path of the bonding layer in a tilting blowing and stacking manner, so that a composite resin layer is formed in the accommodating structure.

The step S62 is preceded by a step S61 of adding wood pulp fiber material to the bottom of the containment structure by means of vertical blowing so as to form a wood pulp absorbent layer on the bottom of the containment structure.

Further, there is provided a production line of a multi-absorption composite absorbent core, which is suitable for the production method of the multi-absorption composite absorbent core, comprising: the hot air shaping device and the blowing and filling assembly are sequentially arranged on the transmission platform along the transmission direction; a first glue spraying device and a first coil feeding device are arranged between the second carding machine and the transmission platform; and a second glue spraying device and a second coil feeding device are arranged between the transmission platform and the hot air device.

The hot air shaping device is arranged on the input side of the transmission platform and is provided with a plurality of rows and columns of air outlets, the air outlets are arranged on an air outlet plane, and the air outlet plane is parallel to the transmission surface of the transmission platform.

The transmission platform is obliquely arranged and is arranged from low to high along with the transmission direction; the transmission platform is provided with a negative pressure adsorption device; the blowing and filling assembly comprises at least three inclined blowing and spraying devices which are continuously arranged along with the conveying direction, and the spraying openings of the inclined blowing and spraying devices are distributed from low to high in a step shape.

The blowing and filling assembly further comprises a vertical blowing and spraying device, the vertical blowing and spraying device is arranged between the hot air shaping device and the inclined blowing and spraying device, the vertical blowing and spraying device is provided with a plurality of second spray holes positioned in a spraying and filling plane, and the spraying and filling plane is parallel to the transmission plane of the transmission platform.

Further, a disposable sanitary article is provided, comprising the multi-absorption composite absorbent core prepared by the production method of the multi-absorption composite absorbent core; or a multi-absorption composite absorbent core prepared by a production line comprising the multi-absorption composite absorbent core.

Compared with the prior art, the invention has the beneficial effects that: the production of the composite absorption core body and the production of the fluffy layer are effectively combined into a whole in a secondary carding mode, the fluffy layer with different functions and the fluffy layer with a single layer are formed, the fluffy layer is molded through a hot air blowing process, and the shape of the combined layer is changed. By utilizing the containing structure on the combining layer, the water absorbing materials forming the composite water absorbing layer can be uniformly distributed and stay at preset positions according to the requirement in a mode of fixing and separating the frame by a physical structure, so that body fluid can quickly permeate, the liquid can be absorbed for multiple times, and the liquid absorbing effect is improved. The problems that a composite water-absorbing layer and a fluffy layer carrier are difficult to effectively permeate in the combining process due to the addition process, the characteristics of the self material of the water-absorbing material, the structural characteristics of the composite carrier and the like of the water-absorbing resin material, and the composite water-absorbing layer structure is uneven and the water-absorbing performance is reduced due to the jumping and shifting of the water-absorbing material during the compounding are solved. And simultaneously optimizes the problem that the traditional fluffy layer manufacturing and the composite absorption core manufacturing can not be simultaneously produced on line.

After carding out the fluffy layer, will mould fluffy layer and produce the containment structure, perpendicular blowing is filled and the slope blows and is filled the mode of the compound absorption of cooperation, not only realized the high-efficient optimization of production technology, can also make full use of the state before fluffy layer solidification to carry out the complex of water absorbing material, cooperation negative pressure effect has not only improved the permeability of adsorbing material, still promoted the fixed effect and the even combination between adsorbing material and the fluffy layer, make the water absorbing material that can not be well utilized in the past can realize good effect under the cooperation of this production technology and production facility.

Drawings

FIG. 1 is a process flow diagram of the production method of the present invention.

FIG. 2 is a schematic diagram of a production line in the present invention.

Fig. 3 is an enlarged view of a portion of a production line in the present invention.

Fig. 4 is a schematic structural view of a soft composite absorbent core in a disposable sanitary article according to the present invention.

Fig. 5 is a schematic view of the bulk layer of the soft composite absorbent core in the disposable sanitary article of the present invention.

FIG. 6 is a schematic view of a molded spray plate according to the present invention.

FIG. 7 is a schematic view of an inclined jet plate according to the present invention.

FIG. 8 is a schematic view of a vertical spray plate according to the present invention.

Reference numerals illustrate: the upper surface layer 100, the fluffy layer 200, the bonding layer 210, the containing structure 211, the relief 212, the cambered surface 213, the single layer 220, the lower surface layer 300, the composite water-absorbing layer 400, the rapid water-absorbing layer 410, the high-pass liquid-absorbing layer 420, the high-storage water-absorbing layer 430, the wood pulp water-absorbing layer 500, the wrapping layer 600, the first carding machine 710, the second carding machine 720, the transmission platform 730, the transmission surface 7301, the hot air shaping device 731, the air outlet plane 7311, the inclined blowing device 732, the injection port 7321, the vertical blowing device 733, the injection plane 7331, the negative pressure adsorption device 734, the hot air device 740, the slitting device 750, the beam air port 761, the first injection hole 762 and the second injection hole 763.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Example 1

As shown in fig. 1, this embodiment is a method for producing a composite absorbent core for multiple absorption, comprising the steps of:

s1, fibrillating a fiber material;

s2, forming a single layer 220 on the fibrillated fiber material through first carding;

s3, forming a bonding layer 210 on the surface of the single layer 220 through second carding, wherein the single layer 220 and the bonding layer 210 form an integrated fluffy layer 200;

s4, bonding a lower surface layer 300 on the bottom surface of the fluffy layer 200;

s5, spraying hot air to local positions of the surface of the bonding layer 210 to locally deform the bonding layer 210 to form a containing structure 211;

s6, sequentially adding a plurality of water absorbing materials into the accommodating structure 211 to form a composite water absorbing layer 400;

s7, adhering an upper surface layer 100 on the surface of the fluffy layer 200 to form a composite fiber web;

Fibrillation is used to initially treat the fibrous material to loosen it; the first carding is used to obtain a parallel, straight web. The first carding to obtain a first web may form a single layer 220; a second web is then carded out on the surface of the single layer 220, which can form the bonding layer 210. The bonding layer 210 is located on the surface of the single layer 220; the integral composite web bonded to the upper skin layer 100 is subjected to hot air consolidation for forming an integral secondary set and to make the integral soft and fluffy.

By combining the first web and the second web, a lofty layer 200 can be formed that is uniform in material, different in structure, and has a composite function. The single layer 220 may be connected or contacted with the lower surface layer 300, the bonding layer 210 may be connected or contacted with the upper surface layer 100, so that the advantages of good bonding effect and difficult separation of the same material while different functions are achieved on one side of the fluffy layer 200 bonded with the upper surface layer 100 and one side of the fluffy layer 200 bonded with the lower surface layer 300. In an uncured state after the formation of the bulk layer 200, the receiving structure 211 formed by spraying hot air can avoid rebound of mechanical pressing on one hand, and rapidly form surface curing while shaping on the other hand, thereby reducing complex procedures required for mechanical pressing. More importantly, the hot air shaping can enable the surface of the concave accommodating structure 211 to form natural smooth transition, no dead angle is formed, and the subsequent spraying and filling of the water absorbing material can be matched better. The composite water-absorbing layer 400 is formed by spraying and filling the containing structure 211, so that on one hand, the tight combination between different materials is promoted by utilizing the functions of pressure and grain refinement, and on the other hand, the containing structure 211 guides the materials, such as water-absorbing resin materials, of which parts are not easy to fix, to be framed in a certain range, so that uniform distribution is formed, and accurate positioning addition is realized.

In step S5 and step S6, further include: the suction negative pressure is continuously applied to the lower surface layer 300 and the bulk layer 200, and at least the bonding layer 210 is made to be under suction negative pressure.

Under the continuous action of negative pressure, the composite absorption core body capable of absorbing for many times can be stably fixed on the one hand, and on the other hand, the fluffy layer 200 is under the action of negative pressure so that the water absorbing material can be better fixed in the fluffy layer 200 under the action of negative pressure, and under the dual actions of jet force and negative pressure adsorption force, gas in the jet process is guided to penetrate through the fluffy layer 200 for dissipation, and the water absorbing material splashing caused by rebound after the impact of the air current is avoided, so that the structure of the composite water absorbing layer 400 is influenced.

After the step S4 to before the step S7, the method further includes the steps of: the bonded fluff layer 200 and lower skin layer 300 are moved obliquely from low to high to form a composite water-absorbent layer 400.

By means of the inclined movement, self-adjusting power is provided for the water absorbing material.

The inclined movement utilizes the natural flow guided by the inclination to improve the consistency of the water absorbing material in the forming process; on the other hand, the overflow of the water absorbing material from the accommodating structure 211 can be effectively reduced, the surface state of the fluffy layer 200 is maintained, and the control of the dimensional accuracy is improved.

The step S6 includes a step S62 of sequentially adding at least three water absorbent resin materials to the accommodating structure 211 by means of oblique blowing and stacking on the moving path of the oblique transfer of the bonding layer 210, thereby forming a composite resin layer in the accommodating structure 211.

By oblique blowing, the bulk layer 200 and the lower surface layer 300 are sequentially stacked several times of water absorbent resin materials in the accommodating structure 211 on a moving path, forming a composite resin layer having at least three layers of composites in the accommodating structure 211.

The continuous production of the composite absorption core body capable of absorbing for many times can be realized by the blowing and spraying of the water absorbing materials in the moving process, meanwhile, the multi-layer composite working procedure is simplified, and the process time is saved. The inclined movement is matched with the inclined blowing, so that on one hand, the natural flow guided by the inclination can be utilized, and the consistency of the water absorbing material in the forming process is improved; on the other hand, the overflow of the water absorbing material from the accommodating structure 211 can be effectively reduced, the surface state of the fluffy layer 200 is maintained, and the control of the dimensional accuracy is improved. The three-layer composite is formed by taking the water-absorbent resin material as the water-absorbent material, which is conducive to the diversification of functions, and solves the problem of poor bonding effect of the water-absorbent resin layer and the fluffy layer 200 by utilizing the cooperation of the accommodating structure 211 and the production process.

The step S62 is preceded by a step S61 of adding wood pulp fiber material to the bottom of the containing structure 211 by means of vertical blowing, thereby forming a wood pulp absorbent layer on the bottom of the containing structure 211.

The wood pulp absorbent layer 500 is also one of the absorbent materials, and the wood pulp absorbent layer 500 needs to be formed to have a stable thickness and to be well bonded with the bonding layer 210 by vertical blowing. Unlike the water-absorbent resin layer, the vertical blowing helps to form a stable penetration pressure, enables precise control of thickness, and establishes a good connection bridge between the water-absorbent resin layer and the bonding layer 210. And the wood pulp water-absorbing layer 500 has better capillary action, can play a role in dispersing and diffusing liquid, and can improve the utilization rate of the water-absorbing resin.

Example 2

The embodiment is a production method of a composite absorbent core body for multiple absorption, comprising the following steps:

s1, fibrillating a short fiber raw material.

S2, carding the fibrillated fiber material into a single layer 220 through first carding, wherein the gram weight of the single layer 220 is 15-50 gsm, and the thickness is 2-4 mm.

S3, carding the bonding layer 210 on the surface of the single layer 220 through second carding, wherein the single layer 220 and the bonding layer 210 form an integrated fluffy layer 200, the fluffy layer 200 can be a fluffy non-woven fabric, the gram weight of the bonding layer 210 is 20-30 gsm, and the thickness is 3-5 mm.

S4, bonding a lower surface layer 300 on the bottom surface of the fluffy layer 200, wherein the lower surface layer 300 can be a non-woven fabric.

S41, linearly moving the fluffy layer 200 from low to high in an inclined mode, wherein the moving speed is 70 m/min to 120m/min.

S42, spraying glue on the bottom of the fluffy layer 200 before negative pressure adsorption is carried out on the fluffy layer 200.

S43. After the fluffy layer 200 is combined with the lower surface layer 300, an adsorption negative pressure is continuously applied to the lower surface layer 300. The suction direction of the negative pressure may be a direction from the bulk layer 200 toward the lower surface layer 300, and the suction force of the negative pressure causes the surface of the bulk layer 200 to shrink toward the bottom surface, and at least the bulk layer 200 is completely under the negative pressure. Specifically, the negative pressure wind speed can be 20m/s to 100m/s. The bottom surface of the fluffy layer 200 is a surface facing the lower surface layer 300, and the surface is a surface parallel to the bottom surface and far away from the lower surface layer 300.

And S5, spraying hot air on the local position of the surface of the bonding layer 210 so as to locally deform the bonding layer 210 to form a containing structure 211, wherein the containing structure 211 can be a strip-shaped groove parallel to the moving direction. In this example, the hot air volume is 0.4L/s to 0.6L/s, the air velocity is 200m/s to 350m/s, and the temperature is 100 ℃ to 350 ℃.

S6, sequentially adding a plurality of water absorbing materials into the accommodating structure 211 to form a composite water absorbing layer 400, wherein the composite water absorbing layer comprises:

S61, forming a wood pulp absorbent layer 500 in the containing structure 211 by vertically blowing the wood pulp fiber material. Specifically, the angle of the blow-down is perpendicular to the surface of the fluff layer 200 such that the wood pulp absorbent layer 500 forms at the bottom of the groove. The thickness of the wood pulp water-absorbing layer 500 is 0.5mm to 1mm, and the wood pulp water-absorbing layer 500 can disperse and diffuse liquid, thereby improving the utilization rate of the water-absorbing resin material.

S62. By oblique blowing, the bulk layer 200 and the lower surface layer 300 are sequentially stacked several times of water absorbent resin materials in the accommodating structure 211 on the moving path, forming a composite resin layer having at least three layers of composites in the accommodating structure 211. Specifically, the oblique blowing can adopt a high-speed blowing mode, so that the water-absorbent resin material is filled in a granulating mode. The three blowing and spraying steps are arranged in sequence from low to high. In this embodiment, the blown composite resin layers are SPA-1, SPA-2, SPA-3 in sequence, and a three-layer composite water-absorbent layer 400 is formed over the wood pulp water-absorbent layer 500 within the containment structure 211.

S63, forming the composite water absorbing layer 400 after a short time, particularly 1S-5S of structural stability. Tilting movement and negative pressure adsorption state release. The composite water-absorbent layer 400 fills the containment structure 211 with the surface of the composite water-absorbent layer 400 being flush with the surface of the tie layer 210.

S7, spraying glue on the bottom surface of the upper surface layer 100; the upper surface layer 100 is bonded to the surface of the bulk layer 200, and the upper surface layer 100 can be a nonwoven fabric in particular, to form a composite web.

S8, carrying out hot air reinforcement and slitting on the composite fiber net to form a composite absorption core body capable of absorbing for multiple times, wherein the composite absorption core body comprises:

s81, carrying out hot air reinforcement on the composite fiber net to form the composite absorption core body.

S82, collecting the reinforced composite absorbent core into a roll.

S83, slitting the rolled composite absorbent core, and slitting the composite core roll with large width into small roll diameters to form the composite absorbent core with composite size and multiple absorption.

S9, coating the split composite absorption core body subjected to repeated absorption by adopting spun-bonded non-woven fabrics, and solving the problem of edge leakage which is easy to cause in splitting.

Example 3

As shown in fig. 2, this embodiment is a production line of a multi-absorption composite absorbent core, and is applicable to the above-mentioned production method of a multi-absorption composite absorbent core, including: the first carding machine 710, the second carding machine 720, the transmission platform 730, the hot air device 740 and the slitting device 750 are sequentially arranged on the same transmission path, and the transmission platform 730 is sequentially provided with a hot air shaping device 731 and a blowing filling component along with the transmission direction; a first glue spraying device and a first coil feeding device are arranged between the second carding machine 720 and the transmission platform 730; a second glue spraying device and a second coil feeding device are arranged between the transmission platform 730 and the hot air device 740.

Unlike the conventional multi-absorbent composite absorbent core production line, the first and second carding machines 710 and 720 are provided such that the production of the bulky layer 200 and the production of the multi-absorbent composite absorbent core are combined into the same production line, thereby realizing on-line one-time molding. The transfer platform 730 satisfies the good combination and continuous production of the shaping of the fluff layer 200 and the compounding of the water-absorbent material. The hot air device 740 is used to thermally cure the multiple-absorption composite absorbent core. The slitting device 750 is used to slit the rolled multiple absorbent composite core. The hot air plastic device continuously shapes the surface of the fluffy layer 200 (i.e., the bonding layer 210) by blowing hot air. The blow-fill assembly is used to continuously multiple-compound various absorbent materials to the bulk layer 200. The first glue spraying device is used for spraying glue on the lower surface of the fluffy layer 200 or the upper surface of the lower surface layer 300 material. The first roll-feeding device is used for conveying the lower surface layer 300 material, so that the lower surface layer 300 material is adhered to the lower surface of the fluffy layer 200 after glue spraying. The second glue spraying device is used for spraying glue on the upper surface of the fluffy layer 200 or the lower surface of the upper surface layer 100 material. The second roll-feeding device is used for conveying the upper surface layer 100 material, so that the upper surface layer 100 material is adhered to the upper surface of the fluffy layer 200 after glue spraying. As shown in the accompanying drawings, the transmission direction is from left to right in this embodiment.

The arrangement of the first and second carding machines 710, 720 not only optimizes the production process, but also improves the overall production efficiency. The production of the multi-layer multifunctional fluffy layer 200 is satisfied by combing twice continuously on the same production line, and the problems that the production of the traditional fluffy layer 200 needs to be carried out on another production line, and the finished fluffy layer 200 needs to be reprocessed on the production line of the composite absorption core body for multiple absorption, so that the efficiency is low and the equipment is complex are solved. And the production line is simple and the efficiency is higher. And can meet the requirement of on-line one-time manufacturing of the composite absorption core body of multiple absorption by utilizing different states (such as a soft state before being shaped after carding) of the fluffy layer 200.

The stable environment for one-time implementation of multiple functions on the production line is created through the transmission platform 730, and a foundation is provided for rapid plastic and efficient compounding of the fluffy layer 200. On one hand, the design of hot air shaping and blowing filling utilizes aerodynamic force, so that a uniform power source can be adopted by a functional mechanism for plastic and composite pairing, and the overall design is simplified; on the other hand, the shaping mode of hot air blowing has strong adaptability to the fluffy layer 200, and particularly the fluffy layer 200 which is commonly made of non-woven fibers in the prior art. The hot air blowing has the characteristics of no contact, continuous molding and structural curing during molding, and realizes good processing of the fluffy layer 200. The blowing and filling assembly has the characteristics of refining material particles, regulating and stabilizing in the continuous production process, precisely controlling the layer thickness and the like, and realizes good combination of the water absorbing material and the fluffy layer 200.

The first glue spraying device and the first coil feeding device are arranged before entering the transmission platform 730, so that the transmission process of the transmission platform 730 is further utilized, and the combination effect between the lower surface layer 300 and the fluffy layer 200 is improved. And allowing the adhesive to set for a sufficient period of time. And a second glue spraying device and a second rolling device are arranged after leaving the transmission platform 730, so as to help seal the surface of the fluffy layer 200 which is compounded by the water-absorbing materials. The water absorbent material is further fixed in the accommodating structure 211 while preventing the entry of foreign matters, and the upper surface layer 100 is sufficiently integrated with the composite water absorbent layer 400 and the bonding layer 210 in the bonding process, so that the consistency and the stability of the performance of the composite absorbent core for multiple absorption are maintained under the subsequent integral curing of the hot air device 740 and the slitting and cutting of the slitting device 750.

As shown in fig. 3, the hot air shaping device 731 is disposed on the input side of the transmission platform 730, the hot air shaping device 731 is provided with air outlets 761 distributed in a plurality of rows and columns, the air outlets 761 are disposed on an air outlet plane 7311, and the air outlet plane 7311 is parallel to the transmission surface 7301 of the transmission platform 730.

The adoption of the beam wind openings 761 distributed in a plurality of rows and columns can accurately limit the shaping wind beams blown out by the hot air shaping device 731, and the parallel arrangement of the wind outlet planes 7311 is used for improving the utilization of wind power. As shown in the drawing, the input side of the transmission platform 730 is the left side in this embodiment.

By arranging the beam wind opening 761, the influence of fluctuation of a wind source on the shaping wind beam is small, the utilization rate of the shaping wind beam on wind power is improved, and therefore blowing shaping is accurately carried out on a preset position. The air outlet plane 7311 is parallel to the transmission plane 7301, which is helpful to shorten the time required for shaping process, improve the acting force of the shaping air beam, and improve the efficiency of hot air shaping.

The transmission platform 730 is obliquely arranged and is arranged from low to high along with the transmission direction; the conveying platform 730 is provided with a negative pressure adsorption device 734; the blowing and filling assembly comprises at least three inclined blowing devices 732 which are continuously arranged along the conveying direction, and the injection ports 7321 of the inclined blowing devices 732 are distributed from low to high in a step shape.

The transport platform 730 is inclined to provide self-moving and self-adjusting power to the water absorbent material. The negative pressure adsorption device 734 is used for fixing, and more importantly, is matched with blowing and spraying of hot air or adsorption materials to enhance the composite effect. The continuously arranged inclined blowing device 732 is used to increase the spray angle with the transport surface 7301 and to achieve continuous compounding of the multiple layers of absorbent material.

The transfer platform 730 moves from low to high, so that the adsorption material can automatically adjust to the position where the adsorption material is not blown and filled under the action of inclination when the adsorption material is excessively filled, the defective rate is reduced, and the consistency of the formation of each adsorption material layer is improved. The inclined transmission surface 7301 forms a larger included angle with the inclined blowing, so that splashing caused by insufficient permeability between part of the water absorbent material and the fluffy layer 200 in the blowing process is reduced, and the water absorbent material always accurately falls into the accommodating structure 211. The negative pressure adsorption and blowing are matched with each other, so that air flow in the blowing process is output through the fluffy layer 200 and the lower surface layer 300, the utilization rate of hot air and water absorbing materials is greatly improved, the permeability of the water absorbing materials in the fluffy layer 200 can be enhanced, and part of water absorbing materials which are difficult to permeate and fix are effectively fixed at preset positions, so that the problem that the overall performance is poor due to uneven distribution of part of water absorbing materials is solved. The bonding effect between the bulk layer 200 and the lower surface layer 300 can be further improved by the negative pressure adsorption. The stepped arrangement of the inclined blowing device 732 helps to maintain a consistent distance from itself to the transport surface 7301 while maintaining its inclination.

The blowing and filling assembly further comprises a vertical blowing device 733, the vertical blowing device 733 is disposed between the hot air shaping device 731 and the inclined blowing device 732, the vertical blowing device 733 is provided with a plurality of second nozzles 763 located in a blowing and filling plane 7331, and the blowing and filling plane 7331 is parallel to the conveying plane 7301 of the conveying platform 730.

The vertical blowing device 733 is suitable for a water absorbing material having a good diffusion bonding effect to the bulk layer 200.

Through the vertical blowing device 733, the water absorbing material is filled in the accommodating structure 211 in a manner of directly blowing and spraying the fluffy layer 200, so that the combination effect of the water absorbing material and the fluffy layer 200 is better. Due to the good penetration effect between the water absorbent material and the bulk layer 200, vertical spraying can better promote the depth combination of the water absorbent material and the accommodating structure 211, reduce splashing, and effectively ensure the penetration depth.

Example 4

The embodiment is a production line of a multi-absorption composite absorbent core, and is applicable to the production method of the multi-absorption composite absorbent core, comprising: the first carding machine 710, the second carding machine 720, the transmission platform 730, the hot air device 740 and the slitting device 750 are sequentially arranged on the same transmission path, and the transmission platform 730 is sequentially provided with a hot air shaping device 731 and a blowing and filling assembly along with the transmission direction; a first glue spraying device and a first coil feeding device are arranged between the second carding machine 720 and the transmission platform 730; a second glue spraying device and a second coil feeding device are arranged between the transmission platform 730 and the hot air device 740.

The input is provided with a feed device and fibrillated material is fed horizontally into the first carding machine 710. The first carding machine 710 first cards the fibrillated fibrous material to form a first web, i.e., a single layer 220. The output first web exits the first carding machine 710 and is then input into the second carding machine 720 from high to low inclination. The second carding machine 720 performs a second carding on the basis of the first web to form a second web, i.e., the fluff layer 200. During carding by the second carding machine 720, the first web is transported obliquely. During the second carding, a new fibrous layer is formed on the surface of the first web, which is the bonding layer 210. After the second web exits the second carding machine 720, it is transported from low to high to a transport platform 730. In the process from the conveying process to the conveying platform 730, the upper surface of the lower surface layer 300 is uniformly sprayed with glue through the first glue spraying device, the lower surface layer 300 material is conveyed by the first coil conveying device, and the bonding of the fluffy layer 200 and the lower surface layer 300 is completed on the conveying platform 730.

After entering the conveying platform 730, the surface of the bonding layer 210 is locally blown and sprayed by a hot air plastic device, the bonding layer 210 deforms at a preset position under the action of air, and the deformation is simultaneously formed into a primary solidification of a shape under the action of hot air temperature to form the accommodating structure 211 with stable shape. The filling of the absorbent material is then performed within the containment structure 211 by spraying the filling assembly, thereby forming a composite absorbent layer 400 within the fluff layer 200. And then uniformly spraying glue on the lower bottom surface of the upper surface layer 100 on the surface of the fluffy layer 200 leaving the transmission platform 730 through a second glue spraying device, distributing the glue on the bottom surface of the upper surface layer 100, conveying the upper surface layer 100 material through a second rolling device, further finishing the adhesion of the fluffy layer 200 and the upper surface layer 100 through a pressing roller before the second fiber web enters the hot air device 740, and completely fixing the composite water absorbing layer 400 in the accommodating structure 211.

The hot air shaping device 731 is disposed on the input side of the transmission platform 730, and the hot air shaping device 731 is provided with air outlets 761 distributed in a plurality of rows and columns, the air outlets 761 are disposed on an air outlet plane 7311, and the air outlet plane 7311 is parallel to the transmission surface 7301 of the transmission platform 730.

The hot air shaping device comprises: the air source is connected with the inlet, the heating component and the air outlet. As shown in fig. 6, the air outlet is provided with a shaping spray plate, and the shaping spray plate is provided with circular beam air outlets 761 arranged in seventeen rows and three columns. The number of rows of the molding spray plates is used to control the specific composition of the accommodating structure 211, such as the accommodating structure 211 is a groove in the embodiment, and each row corresponds to one groove. And the row spacing and number of rows are used to control the blow time of each groove in the containment structure 211. The beam vents 761 can be arranged differently according to the needs of the actual accommodating structure 211.

The transfer platform 730 is disposed obliquely and goes from low to high (e.g., direction F in fig. 3) with the transfer direction; the conveying platform 730 is provided with a negative pressure adsorption device 734; the blowing and filling assembly includes at least three inclined blowing devices 732 arranged continuously along the conveying direction, and the injection ports 7321 of the inclined blowing devices 732 are distributed stepwise from low to high.

The transmission plane 7301 of the transmission platform 730 forms an angle of 10 ° to 30 ° with the horizontal plane, and the transmission platform 730 can be a transmission belt. The transmission belt is provided with a through hole, and the transmission platform 730 is provided with a negative pressure extraction device. The negative pressure is applied to the web through the through holes in the transfer belt such that the negative pressure is applied to the fluff layer 200 and the lower skin layer 300. The inclined blowing device 732 is provided with the same combined bracket. In the combined support, the inclined blowing device 732 is arranged in a step from left to right, and the included angle between the spraying center line of the inclined blowing device 732 and the horizontal plane is 40-80 degrees and is always larger than the included angle between the transmission surface 7301 and the horizontal plane. As shown in fig. 7, the plurality of inclined blowing devices 732 share one inclined blowing plate provided on the combined support. The injection ports 7321 of each inclined blowing device 732 form a corresponding row of first injection holes 762 on the inclined blowing plate, and the number of the first injection holes 762 corresponds to the position of each row of beam tuyeres 761 one by one. The tilt angle of each of the inclined blowing devices 732 is uniform. The distance between the first nozzle hole 762 and the transfer surface 7301 is uniform. In this embodiment, the inclined blowing devices 732 are three in total, and the three water absorbent resin materials are blown from left to right by the respective blowing devices SAP-1, SAP-2, and SAP-3.

The blowing and filling assembly further comprises a vertical blowing device 733, the vertical blowing device 733 is disposed between the hot air shaping device 731 and the inclined blowing device 732, the vertical blowing device 733 is provided with a plurality of second nozzles 763 located in a blowing plane 7331, and the blowing plane 7331 is parallel to the conveying plane 7301 of the conveying platform 730.

As shown in fig. 8, the vertical blowing device 733 is provided with a vertical blowing plate, and a row of second nozzles 763 are formed on the vertical blowing plate, and the positions and the number of the second nozzles 763 are in one-to-one correspondence with the accommodating structures 211. In this embodiment, the vertical blowing device 733 blows wood pulp fiber material.

Example 5

This embodiment is a disposable sanitary article comprising a multi-absorbent composite absorbent core prepared by the above-described production method, as shown in fig. 4 and 5, comprising: an upper surface layer 100, a fluffy layer 200, and a lower surface layer 300, which are sequentially disposed; the fluffy layer 200 includes: a bonding layer 210 and a single layer 220; the single layer 220 is disposed between the bonding layer 210 and the lower surface layer 300; specifically, the bonding layer 210 is disposed above the single layer 220, the bonding layer 210 is provided with a containing structure 211, and a composite water-absorbing layer 400 is disposed in the containing structure 211. The upper surface layer 100 is used to form the liquid intake side of the multi-absorbent composite absorbent core for absorbing external liquids during use. The bulk layer 200 serves to quickly absorb liquid into the interior, and also serves to primarily store liquid while keeping the top sheet 100 dry. The lower skin 300 is used to form a bottom support. The bonding layer 210 serves to contain the absorbent material and to provide a good bond between the absorbent material and the fluff layer 200. The single layer 220 plays a role in supporting and rebounding in the fluffy layer 200, so that on one hand, the bonding layer 210 is supported, and on the other hand, the overall good rebound performance of the fluffy layer 200 is provided, so that the composite absorption core body with multiple absorption has elasticity, and the composite absorption core body meets the requirement of being applied to the skin; the composite water-absorbing layer 400 is formed by compounding a plurality of layers of multifunctional absorbing materials; the containment structure 211 utilizes the characteristics of its own structure to form a good bond with the absorbent material, thereby optimizing the distribution of the absorbent material during the manufacturing process.

The fluffy layer 200 formed by the bonding layer 210 and the single layer 220 is arranged by the containing structure 211 on the bonding layer 210, so that the water absorbing material can be uniformly distributed and remained as required in the production process by a physical structure mode, and a good composite resin layer is formed. The problems that when the composite water-absorbing layer 400 is formed on the plain weave fluffy layer 200 in the prior art, due to the surface and material characteristics of the plain weave fluffy layer serving as a carrier, the composite water-absorbing layer 400 and the fluffy layer 200 are combined to adopt a process, and under the influence of the incompatibility and difficult permeation characteristics of the water-absorbing material and the fluffy layer 200 made of non-woven fabric, the water-absorbing material is jumped and shifted in the combining process of the composite water-absorbing layer 400 and the fluffy layer 200 in the prior art, so that the composite water-absorbing layer 400 is locally accumulated, unevenly distributed and cannot form effective mutual permeation are solved. On the other hand, the material of the bonding layer 210 and the material of the single layer 220 are the same in the embodiments of the present application, so that the bonding layer 210 and the single layer 220 can be well bonded, and the fluffy layer 200 has two layers with different structural characteristics. Under the action of the accommodating structure 211 of the bonding layer 210, the accommodating structure 211 is utilized to frame and separate the water absorbing materials, so that the composite water absorbing layer 400 is uniformly distributed on the fluffy layer 200, meanwhile, the water absorbing materials are distributed in an interlayer design provided by the accommodating structure to form a similar permeation effect, so that good bonding is formed, the same effect as that of permeation into the internal structure of the fluffy layer 200 is formed, gel blocking of the upper surface layer 100 and the lower surface layer 300 is eliminated, and the integral multiple liquid absorbing performance of the composite absorption core body with multiple absorption is improved.

In particular, the upper skin layer 100 and the lower skin layer 300 can be nonwoven fabrics, and the bulk layer 200 can be a bulk nonwoven fabric. The combined layer 210 has a grammage of 20gsm to 30gsm and a height of 3mm to 5mm. The single layer 220 has a grammage of 15gsm to 50gsm and a height of 2mm to 3mm. The fluff layer 200 has a fiber fineness of 3D to 7D.

The bonding layer 210 includes a plurality of ribs 212 spaced apart within the same horizontal layer, the ribs 212 being connected to the single layer 220; the containment structure 211 is formed between two or more adjacent ribs 212, and the composite water-absorbing layer 400 is embedded in the containment structure 211 by filling. The provision of the ribs 212 serves to form the groove-like receiving structure 211.

The bonding layer 210 formed by the ribs 212 is easily industrially distributed. Specifically, the single layer 220 and the bonding layer 210 of the fluffy layer 200 are integrally formed through secondary carding, which is not only convenient for production and processing, but also is beneficial to setting, fixing and improving the bonding effect of the composite water-absorbing layer.

The ribs 212 are all longitudinal ribs, the ribs 212 are uniformly distributed on the surface of the single layer 220, and the height of the ribs 212 is 3mm-8mm.

The longitudinal ribs 212 which are uniformly distributed are convenient to produce and process on one hand, and on the other hand, can meet the requirement of uniform combination with the composite water-absorbing layer, and through the homodromous arrangement, the combination layer 210 can form an integrated stable structure which is similar to a network structure and is permeable and combined with the water-absorbing material, so that when the water-absorbing resin material is used as the water-absorbing material, the water-absorbing material lacks permeability, and the combination effect with the fluffy layer 200 is poor. By further defining the height of the ribs 212, the penetration depth of the composite water-absorbent layer 400 into the like penetration formed by the bulk layer 200 can be reasonably controlled to within a reasonable range, avoiding affecting the overall functionality of the bulk layer 200. The desired properties of the fluff layer 200 are maintained while the composite absorbent layer functions.

The surface of the ridge 212 is an arc surface 213, as shown in the cross-sectional structure of fig. 2, the adjacent two ridge 212 are equidistantly distributed, and the distance between the adjacent two ridge 212 is 0.2 to 1.5 times the width of the ridge 212.

The arcuate surface 213 at the top of the ridge helps to guide the composite absorbent layer 400 during formation such that the absorbent material pools within the containment structure 211 forming a stack that fills effectively rather than the top surface of the ridge 212. On the other hand, an arc structure in the accommodating structure 211 is formed, so that the water absorbing material can be completely filled in the accommodating structure 211, and a good combination effect of the composite water absorbing layer 400 and the fluffy layer 200 is achieved.

In this embodiment, the ribs 212 are all longitudinal, the ribs 212 are uniformly distributed on the surface of the single layer 220, and the height of the ribs 212 is 5mm.

The surface of the ridge 212 is an arc surface 213, the ridge 212 is equally spaced in the bonding layer 210 and the distance between two adjacent ridges 212 is 0.225 times the width of the ridge 212.

The composite water-absorbing layer 400 includes at least a composite resin layer including water-absorbing resin layers formed of at least two water-absorbing resin materials, each of which has a thickness of 0.3mm to 1.2mm.

The combination of the water absorbent resin materials with various different characteristics is helpful for the diversification of the functions of the composite water absorbent layer 400, and meets the requirements of different stages in the absorption process according to different requirements in the liquid permeation process. Further, the thickness of each water-absorbent resin layer is limited, which helps to ensure the independence of functions between the water-absorbent resin layers, to match the size of the accommodating structure 211 and to ensure the effectiveness of the functions.

The water absorbent resin layer includes: a rapid absorbent layer 410, a high-pass liquid absorbent layer 420, and a bulk absorbent layer 430. The distribution modes of the rapid water absorption layer 410, the high-pass liquid absorption layer 420 and the large-storage water absorption layer 430 may be: sequentially from a side near the upper surface layer 100 toward the single layer 220. The quick absorbent layer 410 is used for quickly transferring the liquid of the upper surface layer 100, and keeping the upper surface layer 100 dry and comfortable to contact with the skin by increasing the absorption speed; the high-pass liquid absorbing layer 420 is used for improving the speed of liquid transfer, and as a bridge for high-speed transmission, the high-pass liquid absorbing layer can compensate for the problem of insufficient liquid storage capacity of the quick absorbing layer 410, and can quickly transfer and disperse liquid, avoid gel blocking, improve the effective utilization rate of the composite resin layer, and enable the liquid entering the quick absorbing layer 410 to be quickly transferred. The large stock absorbent layer 430 is primarily used to store liquids so that the liquids can be securely locked in the composite absorbent layer 400 and provide greater storage. The rapid water absorption layer 410, the high-pass liquid absorption layer 420 and the large-storage water absorption layer 430 can be arranged to realize the function of the composite water absorption layer 400 for absorbing liquid for multiple times, so that the effect of the composite water absorption layer 400 absorbing liquid is improved.

The three water-absorbing resin layers are sequentially adopted to form the composite resin layer, so that a good combined absorption effect of the composite water-absorbing layer 400 can be realized, on one hand, liquid transmitted from the upper surface layer 100 is rapidly absorbed, dryness of the upper surface layer 100 is kept, on the other hand, the liquid can be rapidly transferred through rapid transmission and large-storage collocation, and the utilization rate is improved, and meanwhile, the water-absorbing layer has a large enough absorption capacity.

In this embodiment, the rapid absorbent layer 410 can be made of SAP-1, and has a thickness of 0.35mm to 0.55mm. A particularly suitable absorbent material for the high-pass liquid absorbent layer 420 is SAP-2, having a thickness of 0.4mm to 0.9mm. A particularly useful absorbent material for the bulk absorbent layer 430 is SAP-3, having a thickness of 0.45mm to 1.1mm.

The composite water-absorbing layer 400 is formed by spraying and compounding layer by layer, and the gram weight of the water-absorbing resin layer is 70gsm (gram/Square Meter) to 140gsm.

The layer-by-layer spray compounding is helpful for realizing the rapid combination of the water-absorbent resin layer and the water-absorbent resin layer by the particle combination mode between the water-absorbent resin layer and other water-absorbent material layers or the fluffy layer 200, thereby improving the efficiency and the lifting effect.

In this embodiment, the quick absorbent layer 410 is added in an amount of 65gsm to 90gsm. The high-pass liquid absorbent layer 420 is added in an amount of 90gsm to 110gsm. The bulk absorbent layer 430 is added in an amount of 120gsm to 130gsm.

A wood pulp absorbent layer 500 is further disposed between the composite absorbent layer 400 and the single layer 220. The wood pulp absorbent layer 500 is used to form a good bond between the composite resin layer and the bulk layer 200, and the good diffusivity of the wood pulp fibrous material in the wood pulp absorbent layer 500 is utilized, so that the composite resin layer can form a stable bond and a firm bond with the containing structure 211 by taking the wood pulp absorbent layer 500 as a medium.

By arranging the wood pulp water-absorbing layer 500, the problem of insufficient diffusivity of the composite resin layer under the fluffy layer 200 formed by the non-woven fabric is further solved by utilizing the diffusivity of the wood pulp fibers, and the multi-time liquid absorption performance of the multi-time absorption composite absorption core is improved.

The wood pulp water-absorbing layer 500 is compounded in the accommodating structure 211 in a blowing mode and is positioned at the bottom of the accommodating structure 211, and the thickness of the wood pulp water-absorbing layer 500 is 0.3mm-0.6mm.

The combination of the wood pulp absorbent layer and the containing structure 211 by spraying facilitates the better penetration and diffusion of the fiber capillaries of the wood pulp absorbent layer 500 in the bulk layer 200, thereby producing a good bonding effect between the wood pulp absorbent layer 500 and the bulk layer 200 and improving the connection stability between the composite resin layer and the bulk layer 200.

The multi-absorbent composite absorbent core is further provided with a wrapping layer 600, said wrapping layer 600 wrapping said upper skin layer 100, said fluff layer 200 and said lower skin layer 300. Integral encapsulation of composite absorbent core for multiple absorption by the wrapping 600

The composite absorbing core body capable of being absorbed for multiple times can be further protected by arranging the wrapping layer 600, the integration of the composite absorbing core body capable of being absorbed for multiple times is improved, the composite absorbing core body is not easy to disperse, and a certain dustproof and dampproof effect is achieved.

It should be understood that the foregoing examples of the present invention are merely illustrative of the present invention and are not intended to limit the present invention to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method of producing a multiple absorption composite absorbent core comprising the steps of:

s1, fibrillating a fiber material;

S4, bonding a lower surface layer on the bottom surface of the fluffy layer;

s6, sequentially adding a plurality of water absorbing materials into the accommodating structure in a blowing and spraying mode to form a composite water absorbing layer;

s8, carrying out hot air reinforcement and slitting on the composite fiber net to form a composite absorption core body for multiple absorption;

in the process from the step S4 to the step S7, the method further includes the steps of: continuously applying adsorption negative pressure to the lower surface layer and the fluffy layer, and enabling at least the bonding layer to be under the action of the adsorption negative pressure;

in the process from the step S4 to the step S7, the method further includes the steps of: the bonded fluffy layer and the bonded lower surface layer move obliquely from low to high until a composite water-absorbing layer is formed;

the step S6 includes a step S62: sequentially adding at least three water-absorbent resin materials into the accommodating structure on the moving path of the bonding layer in an inclined blowing and stacking mode, so as to form a composite resin layer in the accommodating structure;

before the step S62, the method further includes a step S61: the wood pulp fiber material is added to the bottom of the containing structure by means of vertical blowing, so that a wood pulp absorbing layer is formed on the bottom of the containing structure.

2. A production line of a multi-absorption composite absorbent core, adapted to the production method of a multi-absorption composite absorbent core according to claim 1, comprising:

the first carding machine and the second carding machine are sequentially arranged on the same transmission path, so that the production of the fluffy layer and the production of the composite absorption core body for multiple absorption are combined into the same production line;

the transmission platform is used for shaping the fluffy layer, and the composite combination and continuous production of the water absorbing material;

the hot air device is used for thermally curing the composite absorption core body which is absorbed for many times;

the slitting device is used for slitting the coiled composite absorption core body which is absorbed for many times;

the hot air shaping device and the blowing and filling assembly are sequentially arranged on the transmission platform along the transmission direction;

the hot air plastic device continuously shapes the bonding layer of the fluffy layer in a hot air blowing and spraying mode;

the blowing and spraying filling assembly is used for continuously compounding various water-absorbing materials for a plurality of times on the fluffy layer;

a first glue spraying device and a first coil feeding device are arranged between the second carding machine and the transmission platform;

the first glue spraying device is used for spraying glue on the lower surface of the fluffy layer or the upper surface of the lower surface layer material;

The first coil feeding device is used for conveying the lower surface layer material so that the lower surface layer material is adhered to the lower surface of the fluffy layer after glue spraying;

a second glue spraying device and a second coil feeding device are arranged between the transmission platform and the hot air device;

the second glue spraying device is used for spraying glue on the upper surface of the fluffy layer or the lower surface of the upper surface layer material;

the second winding device is used for conveying the upper surface layer material, so that the upper surface layer material is bonded with the upper surface of the fluffy layer after glue spraying.

3. The production line of a multi-absorption composite absorbent core according to claim 2, wherein the hot air shaping device is arranged on the input side of the transmission platform, the hot air shaping device is provided with beam air openings distributed in a plurality of rows and columns, the beam air openings are arranged on an air outlet plane, and the air outlet plane is parallel to the transmission surface of the transmission platform.

4. The production line of a multi-absorption composite absorbent core according to claim 2, wherein the conveying platform is arranged obliquely and is arranged from low to high along with the conveying direction; the transmission platform is provided with a negative pressure adsorption device; the blowing and filling assembly comprises at least three inclined blowing and spraying devices which are continuously arranged along with the conveying direction, and the spraying openings of the inclined blowing and spraying devices are distributed from low to high in a step shape.

5. The multiple absorption composite absorbent core production line according to claim 4, wherein the blow-and-fill assembly further comprises a vertical blow-and-fill device, the vertical blow-and-fill device being disposed between the hot air shaping device and the inclined blow-and-fill device, the vertical blow-and-fill device being provided with a plurality of second spray holes located in a fill plane, the fill plane being parallel to the transport plane of the transport platform.

6. A disposable sanitary article comprising a multi-absorbent composite absorbent core prepared by the method of producing a multi-absorbent composite absorbent core according to claim 1;

or a multi-absorbent composite absorbent core prepared in a production line comprising a multi-absorbent composite absorbent core according to any one of claims 2-5.