CN115105301A - Manufacturing method of absorption core body with fast diffusion and accumulation prevention - Google Patents
Manufacturing method of absorption core body with fast diffusion and accumulation prevention Download PDFInfo
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- CN115105301A CN115105301A CN202210570028.3A CN202210570028A CN115105301A CN 115105301 A CN115105301 A CN 115105301A CN 202210570028 A CN202210570028 A CN 202210570028A CN 115105301 A CN115105301 A CN 115105301A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000009825 accumulation Methods 0.000 title claims abstract description 11
- 238000009792 diffusion process Methods 0.000 title abstract description 18
- 230000002265 prevention Effects 0.000 title abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 65
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 45
- 229920000247 superabsorbent polymer Polymers 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 4
- 239000002250 absorbent Substances 0.000 claims description 49
- 230000002745 absorbent Effects 0.000 claims description 39
- 239000000835 fiber Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 229920000642 polymer Polymers 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 9
- 238000004049 embossing Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 3
- 241000405070 Percophidae Species 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 210000002700 urine Anatomy 0.000 abstract description 24
- 238000007373 indentation Methods 0.000 abstract description 23
- 238000003825 pressing Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 12
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15764—Transferring, feeding or handling devices; Drives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15804—Plant, e.g. involving several steps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15804—Plant, e.g. involving several steps
- A61F2013/15813—Plant, e.g. involving several steps with modular lines
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Epidemiology (AREA)
- Manufacturing & Machinery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Botany (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a method for manufacturing an absorption core body with fast diffusion and accumulation prevention, which comprises the following steps: crushing wood pulp and dividing the crushed wood pulp into an upper part and a lower part with the ratio of 7: 3; adding the super absorbent polymer particles into the upper wood pulp and uniformly mixing; pure wood pulp and a mixture of wood pulp and super absorbent polymer particles are absorbed by negative pressure; transferring the mixture to a lower coating material for lower coating; carrying out upper coating; compacting and gluing; printing and pressing to finish the finished product. The absorption core body prepared by the method is provided with the indentation which is used as a channel for guiding urine to flow, so that the urine diffusion speed is higher; the indentation can form a structure similar to a wall body in the core, so that the internal structure of the core is fixed more stably.
Description
Technical Field
The invention relates to the technical field of water-absorbing materials, in particular to a manufacturing method of an absorption core body with quick diffusion and accumulation prevention.
Background
The paper diaper is a disposable diaper, and the user group mainly comprises two categories of infants and adults with inconvenient actions, so that the paper diaper not only greatly facilitates the treatment of some things by people, but also provides more advanced sanitary guarantee.
However, the existing diapers also have some problems, such as: 1. although the core has very good water absorption performance, the urine is diffused on the surface of the core in a 'flood irrigation' mode, on one hand, the core firstly absorbs water at a place contacting the urine and then diffuses to the periphery in the core, so that the urine is diffused internally, and the internal diffusion speed is relatively slow; on the other hand, urine on the surface of the core body has height difference, and flows from a high place to a low place, so that the urine is diffused externally, and the external diffusion speed is relatively high; however, when a large amount of urine is instantaneously discharged (in actual conditions, the user uncontrollably urinates, and the instantaneous amount is large), the height difference of the urine on the surface of the core body is not obvious, the external diffusion speed is not good, the urine is absorbed by the position near the position which is firstly contacted with the urine, and the absorption by other positions is small, so that the absorption is not uniform, and the water absorption is influenced for many times. 2. The fixed effect of granule that absorbs water in the core is poor, easily appears sticking together, accumulational problem, especially the granule that absorbs water after absorbing water becomes heavier, and when panty-shape diapers tremble a little, the granule that absorbs water will pile up together, causes to rise the fault phenomenon that sticks together, influences many times hydroscopicity.
Disclosure of Invention
Therefore, the invention provides a method for manufacturing an absorption core body with fast diffusion and accumulation prevention, which is applied to disposable wearing articles such as paper diapers and the like, has the characteristics of instantly diffusing liquid such as urine and the like and more effectively fixing internal water absorption particles, and solves the technical problems in the background technology.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for manufacturing a fast-diffusing, anti-stacking absorbent core, comprising the steps of;
step S1, a wood pulp crusher is used for crushing the wood board to form wood pulp, and the wood pulp is divided into an upper layer and a lower layer with the ratio of 7:3 at an outlet channel of the crusher;
step S2, adding superabsorbent polymer particles into upper wood pulp accounting for 70% of the weight of the upper wood pulp and uniformly mixing the superabsorbent polymer particles;
step S3, the mixture of upper layer wood pulp and high water absorption polymer particles and pure wood pulp are absorbed by a large mould wheel to form a water absorption fiber-integrated body, wherein, the upper layer of the water absorption fiber-integrated body is an upper fiber-integrated body with high water absorption polymer particle content, the lower layer is a lower fiber-integrated body with low high water absorption polymer particle content, and no obvious limit exists between the upper fiber-integrated body and the lower fiber-integrated body;
step S4, covering the outer side of the water-absorbing integrated fiber body with a cover sheet to complete the manufacture of the layered structure of the absorbing core;
step S5, compacting and gluing;
step S6, a mesh score line is laminated on the absorbent core to form corresponding concave portions, and convex portions are formed on the convex portions of the concave portions to form an absorbent core product.
Further, before step S1, the wood pulp grinder is adjusted to adjust the gap between the bed knife and the middle rotor grinding knife wheel to be 1-1.5 mm.
Further, before step S1, the wood pulp crusher is adjusted to have an intermediate baffle at the crusher outlet passage to divide the crushed wood pulp product into 2 layers when passing through the crusher outlet passage, and the upper layer accounts for 70% and the lower layer accounts for 30% under the action of the intermediate baffle.
Further, in step S2, the super absorbent polymer particles are transported to a discharge duct by a belt driven by a servo motor, blown off by a filter fan, passed through a flat duckbill of 9.5cm by 1cm, and introduced into the comminuted wood pulp product, and thoroughly mixed with the upper layer of wood pulp.
Further, in step S4, there are divided into two steps of upper cladding and lower cladding; the water-absorbing fiber-accumulating body is absorbed on the lower coating material on the conveyor belt through the transfer wheel, and is folded and coated twice, namely the lower coating; the upper layer is added with an upper coating material, and the two-time folding coating is adopted as the upper coating.
Further, before the under-coating of step S4, a hot-melt adhesive is applied to the coating material.
Further, in step S6, a pair of rollers is used to perform the pressing of the embossing line, wherein a smooth round roller is used on the lower side, and an embossing roller with a diamond pattern is used on the upper side; the upper and lower rollers are heated simultaneously, the temperature is set to 65 + -2 deg.C.
Further, in step S6, the gap between the upper and lower rollers is 65% ± 5% of the thickness of the absorbent core before indentation.
The invention has the following advantages:
the manufacturing method of the absorption core body with fast diffusion and accumulation prevention can manufacture the absorption core body with embossing (indentation), and the indentation is used as a channel for guiding urine to flow, so that the urine diffusion speed is higher; the indentation can form a structure similar to a wall body in the core body, so that the internal structure of the core body is fixed and more stable (mainly, the super absorbent polymer particles are limited and cannot be piled up and piled up).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the drawings provided to one of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
Fig. 1 is a schematic view of the layer structure of a fast-diffusing, anti-stacking absorbent core provided in example 1.
Figure 2 is a schematic illustration of the impression distribution of the fast dispersing, anti-stacking absorbent core provided in example 1.
Fig. 3 is a flow chart of a method of making a fast-dispersing, anti-stacking absorbent core as provided in example 2.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
Example 1
As shown in fig. 1 and 2, example 1 provides an absorbent core with fast diffusion and anti-accumulation, which is applied to disposable wearing articles such as diapers, and has the function of instantly diffusing liquid such as urine, so as to reduce the uneven absorption situation, and at the same time, can more effectively fix (not completely fix) the internal absorbent particles, and avoid the problem of accumulation of the absorbent particles.
The absorbent core comprises a water-absorbent fiber-forming body 1 and a cover sheet 2.
The water-absorbent integrated fiber 1 is mainly composed of pulp fibers (not shown) and superabsorbent polymer particles (SAP, not shown in the figure, indicated by "hexagon" in fig. 1), and the ratio of the pulp fibers to the superabsorbent polymer particles is a ratio commonly used in the art, and unlike the prior art, the water-absorbent integrated fiber 1 is divided into an upper integrated fiber 11 and a lower integrated fiber 12 having different superabsorbent polymer particle contents, the superabsorbent polymer particle content in the upper integrated fiber 11 is high, the superabsorbent polymer particle content in the lower integrated fiber 12 is low, the upper integrated fiber 11 and the lower integrated fiber 12 have no definite boundary (pulp fibers are mixed with each other between them), and the thickness of the upper integrated fiber 11 is larger than that of the lower integrated fiber 12. In the production process, wood pulp (one kind of pulp fiber) is firstly divided into an upper part and a lower part at the outlet of the crusher at the ratio of 7:3, then adding the super absorbent polymer particles into the upper part and mixing the super absorbent polymer particles and the super absorbent polymer particles, while the lower part is not added with the super absorbent polymer particles, in the subsequent process, the upper part and the lower part are simultaneously adsorbed by the negative pressure of the large mould wheel (below), the pure wood pulp at the lower layer is firstly adsorbed on the large mould wheel, the mixture of the wood pulp and the super absorbent polymer particles is then adsorbed on the large mould wheel, the simple non-uniform mixing is carried out in the process, therefore, the final mixture on the large die wheel has a high superabsorbent polymer particle content in the upper layer and a low superabsorbent polymer particle content in the lower layer, so that the upper fiber-forming body 11 and the lower fiber-forming body 12 having different superabsorbent polymer particle contents are formed, and the upper fiber-forming body 11 and the lower fiber-forming body 12 have no clear limit.
The cover sheet 2 is made of a water-permeable and air-permeable paper material such as wet-strength paper. The cover sheets 2 are coated on both sides of the water-absorbent fiber-laminated body 1, and each cover sheet is coated with a plurality of layers, for example, two layers.
The water-absorbent integrated fiber 1 wrapped with the cover sheet 2 does not constitute a finished absorbent core, but the water-absorbent integrated fiber 1 and the cover sheet 2 constitute a layered structure of the absorbent core, and a convex portion 21 and a concave portion 22 are provided on the upper side of the absorbent core (i.e., the side on which the integrated fiber 11 is located), and the convex portions 21 are independent of each other and are not connected, and the concave portions 22 are connected to form a net structure. During manufacturing, the indentation forming mode is adopted to form reticular indentations on the upper layer cover shell and the water-absorbing integrated fiber body 1 (mainly the upper integrated fiber body 11, because the indentations are shallower along with the increase of the depth, the indentations rarely appear on the lower integrated fiber body 12), and the indentations are reflected on the cover sheet 2 and become the convex parts 21 and the concave parts 22 of the absorbing core body. The protrusions 21 are diamond-shaped blocks distributed in an array, so that the recesses 22 connected in one piece are in a diamond net shape, and the long diagonal direction of the diamond is the same as the length direction of the absorbent core.
The super absorbent polymer particles are used for absorbing and locking water, and the pulp fibers play a role of a skeleton, support and limit the positions of the super absorbent polymer particles and perform internal diffusion. The net-shaped concave parts 22 on the surface of the absorption core can be used as urine flow channels to guide urine to diffuse rapidly, and simultaneously, the height difference is increased, the external diffusion speed is further increased, and the urine is prevented from overflowing from the side part of the absorption core in the width direction (side leakage); the rhombic net-shaped concave part 22 is adopted, the long diagonal line is the same as the length direction of the absorbent core, and the guiding capacity of the concave part 22 in the length direction is higher than that in the width direction, so that urine can be guided to diffuse along the length direction, and side leakage is further avoided. The absorption core body with the greatly improved external diffusion effect can absorb and lock water by the internal high water absorption polymer particles after urine is instantly diffused on the surface of the absorption core body, so that the absorption is more uniform; because the mode of unevenly distributing the super absorbent polymer particles is adopted, under the condition that the super absorbent polymer particles are not increased on the whole, more super absorbent polymer particles are arranged in the upper fiber-collecting body 11 on the upper layer (the side close to the human body), and the instantaneous absorption capacity is improved; the improvement of the instantaneous absorption capability further avoids the side leakage and simultaneously avoids the reverse osmosis problem. An indentation process is adopted as a subsequent process to prepare the absorption core body, so that the upper layer cover shell and the water-absorbing fiber-integrated body 1 (especially the upper fiber-integrated body 11 containing more high water-absorbing polymer particles) are provided with indentations, the high water-absorbing polymer particles can be relatively fixed, and the problem of accumulation of the high water-absorbing polymer particles is avoided; meanwhile, the indentation becomes shallow along with the increase of the depth, the fixing force is reduced, but the high water-absorbing polymer particles are gathered in the upper fiber-forming body 11, the high water-absorbing polymer particles in the lower fiber-forming body 12 with lower indentation fixing effect are fewer, the strong fixing force corresponds to the upper fiber-forming body 11 with high content of the high water-absorbing polymer particles, the weak fixing force corresponds to the lower fiber-forming body 12 with low content of the high water-absorbing polymer particles, and the whole fixing effect of the high water-absorbing polymer particles is further improved; the net-like structure is manufactured by the indentation process rather than the material removal process because the density of the portions corresponding to the indentations (i.e., the concave portions 22) is increased instead of the material removal process, and a structure similar to a "wall body" (a portion corresponding to a gradually lighter color below the concave portions 22 as shown in fig. 1) can be formed in the absorbent core, thereby fixing the superabsorbent polymer particles in the convex portions 21.
Example 2
As shown in fig. 3, example 2 provides a method for manufacturing a fast-diffusing, anti-stacking absorbent core, which is used to manufacture the absorbent core of example 1.
The method comprises the following steps:
and step S1, a wood pulp crusher is used for crushing the wood plates to form wood pulp, and the wood pulp is divided into an upper layer and a lower layer at an outlet channel of the crusher. The upper layer accounts for 60-80%, and the rest is returned to the lower layer, in this embodiment, the upper layer accounts for 70%. Before crushing, the gap between the bottom knife and the crushing knife wheel of the middle rotor is adjusted to be 1-1.5mm, so that the crushing effect reaches the best state. Set up middle baffle at rubbing crusher exit passage, when the wood pulp product after the smashing passes through rubbing crusher exit passage, divide into 2 layers, realize through middle baffle that the upper strata accounts for 70%, the lower floor accounts for 30%.
In step S2, superabsorbent polymer particles are added to 70% of the upper wood pulp and mixed uniformly. The super absorbent polymer particles are conveyed to a discharging pipeline through a belt driven by a servo motor, blown away by a filtering fan, enter the crushed wood pulp product through a flat duck bill of 9.5cm x 1cm, and are fully mixed with the upper layer wood pulp.
And step S3, adsorbing the mixture of the upper layer wood pulp and the super absorbent polymer particles and the pure wood pulp by a large mould wheel to form a water-absorbent fiber-laminated body, wherein the upper layer of the water-absorbent fiber-laminated body is an upper fiber-laminated body with high content of the super absorbent polymer particles, the lower layer of the water-absorbent fiber-laminated body is a lower fiber-laminated body with low content of the super absorbent polymer particles, and no obvious limit exists between the upper fiber-laminated body and the lower fiber-laminated body. 30% pure wood pulp and wood pulp, super absorbent polymer particle mixture are adsorbed by the negative pressure of the large mould wheel at the same time, because the large mould wheel is under, 30% pure wood pulp is also in the lower floor, pure wood pulp adsorbs to the large mould wheel first, wood pulp, super absorbent polymer particle mixture adsorb to the large mould wheel after, so in the super absorbent fiber-accumulating body above the large mould wheel, the upper layer forms the upper fiber-accumulating body containing more super absorbent polymer particles, the lower layer contains less super absorbent polymer particle lower fiber-accumulating body, the adsorption process is the process of inhomogeneous mixing.
In step S4, a cover sheet is coated on the outer side of the water-absorbent fiber laminate to complete the production of the layered structure of the absorbent core. The cover sheet is made of water-permeable and air-permeable paper materials, such as wet-strength paper and the like. The method comprises two steps of upper coating and lower coating; the water-absorbing fiber-accumulating body is absorbed on the lower coating material on the conveyor belt through the transfer wheel, and is folded and coated twice, namely the lower coating; an upper coating material is added on the upper layer, and the upper layer is folded and coated twice, namely an upper coating; after the over-coating is completed, the layered structure of the entire absorbent core is formed and the coating material becomes the cover sheet. Before the under-coating, the coating material may be subjected to HMA coating treatment (hot melt adhesive coating).
And step S5, compacting and gluing. The absorbent core is compacted by a compaction roller, reducing the thickness while making the adhesive more solid.
In step S6, a mesh-like embossing line is pressed on the upper layer (side having a high content of superabsorbent polymer particles) of the absorbent core to form concave portions corresponding to the embossed portions of the concave portions. Pressing by a pair of rollers, wherein a smooth round roller is adopted at the lower part, and an embossing roller with diamond patterns is adopted at the upper part; the upper and lower rolls were heated simultaneously, with a temperature setting of 65. + -. 2 ℃. The requirement of setting the clearance is that the product can have cleaning patterns, does not generate hard blocks and cannot crush materials; it has been investigated that in this embodiment, the gap is 65% ± 5% of the pre-embossed thickness of the absorbent core. Thus, the finished absorbent core is finished, the upper surface of the finished absorbent core has clear patterns, and the pressed patterns can fix the internal structure of the product (mainly fixing the super absorbent polymer particles), have a diversion effect and reduce the contact area. The net-shaped indentation is in a rhombus net shape, so that the convex parts are in a rhombus block shape and are distributed in an array, and the direction of the long diagonal of the rhombus is the same as the length direction of the absorption core body.
The method of example 2 is used to manufacture the absorbent core of example 1, and therefore, the method of example 2 can also solve the technical problems in the background art, such as: the super absorbent polymer particles are used for absorbing and locking water, and the pulp fibers play a role of a skeleton, support and limit the positions of the super absorbent polymer particles and perform internal diffusion; the reticular concave parts on the surface of the absorption core body can guide urine to diffuse rapidly, and simultaneously, the height difference is increased, the external diffusion speed is further increased, and the urine is prevented from overflowing from the side part of the absorption core body in the width direction (side leakage); the guiding capability of the concave part in the length direction is higher than that in the width direction, so that urine can be guided to diffuse along the length direction, and side leakage is further avoided; the absorption core body with greatly improved external diffusion effect ensures more uniform urine absorption; the super absorbent polymer particles in the upper fiber are more, so that the instantaneous absorption capacity is improved, the side leakage is further avoided, and the reverse osmosis problem is also avoided; the upper layer cover shell and the water-absorbing fiber-integrating body (especially the upper fiber-integrating body containing much high water-absorbing polymer particles) are provided with indentations, so that the high water-absorbing polymer particles can be relatively fixed, and the problem of accumulation of the high water-absorbing polymer particles is avoided; meanwhile, the indentation with strong fixing force corresponds to the upper fiber-forming body with high content of the polymer particles with high water absorption, and the indentation with weak fixing force corresponds to the lower fiber-forming body with low content of the polymer particles with high water absorption, so that the overall fixing effect is further improved; the indentation process is used to produce the network structure rather than the material removal process because, instead of the material removal process, the density of the corresponding portions of the indentations (i.e., the valleys) is increased, enabling a structure similar to a "wall" to be formed within the absorbent core, thereby immobilizing the superabsorbent polymer particles within the peaks.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (8)
1. A method for manufacturing a fast-diffusing, anti-stacking absorbent core, comprising the steps of;
step S1, a wood pulp grinder is used for grinding wood plates to form wood pulp, the wood pulp is divided into an upper layer and a lower layer at an outlet channel of the grinder, and the upper layer accounts for 60-80%;
step S2, adding the super absorbent polymer particles into the upper layer wood pulp and mixing uniformly;
step S3, the mixture of upper layer wood pulp and high water absorption polymer particles and pure wood pulp are absorbed by a large mould wheel to form a water absorption fiber-integrated body, wherein, the upper layer of the water absorption fiber-integrated body is an upper fiber-integrated body with high water absorption polymer particle content, the lower layer is a lower fiber-integrated body with low high water absorption polymer particle content, and no obvious limit exists between the upper fiber-integrated body and the lower fiber-integrated body;
step S4, covering the outer side of the water-absorbing integrated fiber body with a cover sheet to complete the manufacture of the layered structure of the absorbing core;
step S5, compacting and gluing;
step S6, a mesh score line is laminated on the absorbent core to form corresponding concave portions, and convex portions are formed on the convex portions of the concave portions to form an absorbent core product.
2. The method of making a fast dispersing, anti-stacking absorbent core as in claim 1, wherein prior to step S1, the wood pulp shredder is adjusted to adjust the bed knife to interrotor shredder wheel gap of between 1-1.5 mm.
3. The method of making a fast-dispersing, anti-stacking absorbent core as in claim 2, wherein prior to step S1, the wood pulp shredder is modified to provide intermediate dams in the exit path of the shredder such that the shredded wood pulp product is divided into 2 layers as it passes through the exit path of the shredder and the intermediate dams effect 70% upper layer and 30% lower layer.
4. The method of making a fast-dispersing, anti-stacking absorbent core as in claim 1, wherein in step S2, superabsorbent polymer particles are transported by a servo-motor driven belt to a discharge duct, blown off by a filtered fan, passed through a 9.5cm x 1cm flat duckbill into the comminuted wood pulp product, and thoroughly mixed with the upper layer of wood pulp.
5. The method of making a fast-dispersing, anti-stacking absorbent core as in claim 1, wherein in step S4, there are two steps of over-coating and under-coating; the water-absorbing fiber-accumulating body is absorbed on the lower coating material on the conveyor belt through the transfer wheel, and is folded and coated twice, namely the lower coating; the upper layer is added with an upper coating material, and the two-time folding coating is adopted as the upper coating.
6. The method of making a fast-dispersing, anti-stacking absorbent core as in claim 5, wherein the under-coating of step S4 is preceded by applying a hot melt adhesive to the coating material.
7. The method of making a fast-dispersing, accumulation-resistant absorbent core as in claim 1 wherein in step S6, embossing lines are applied using a pair of rollers, wherein the lower side is smooth round and the upper side is embossing rollers having a diamond pattern; the upper and lower rollers are heated simultaneously, the temperature is set to 65 + -2 deg.C.
8. The method of claim 7 wherein the gap between the upper and lower rollers is 65% ± 5% of the pre-impression thickness of the absorbent core in step S6.
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Application publication date: 20220927 |