CN115429542A - Gradually-sucking incontinence pad and preparation method and application thereof - Google Patents
Gradually-sucking incontinence pad and preparation method and application thereof Download PDFInfo
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- CN115429542A CN115429542A CN202110621626.4A CN202110621626A CN115429542A CN 115429542 A CN115429542 A CN 115429542A CN 202110621626 A CN202110621626 A CN 202110621626A CN 115429542 A CN115429542 A CN 115429542A
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- molecular water
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Images
Classifications
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- 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
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- 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
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53713—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction
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- 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
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- A—HUMAN NECESSITIES
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- 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
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/5307—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the quantity or ratio of superabsorbent material
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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
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Botany (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a gradual-suction incontinence pad and a manufacturing method and application thereof. The gradual-suction incontinence pad consists of a surface layer, an absorption core and a bottom layer; wherein, the absorption core is formed by echelon mixing after the same proportion fluff fiber piles up with the polymer resin that absorbs water of different proportions in succession, and the absorption core accomplishes from the top layer to the bottom layer and absorbs gradually. The manufacturing method comprises the following steps: the absorption core is macromolecule water-absorbing resin particles which are uniformly mixed with the fluff fibers, and the macromolecule water-absorbing resin particles collide with high-speed high-pressure micro-mist particles and settle in a plurality of isolation chambers in a gradient manner after friction and speed reduction. The fluff fibers with the same proportion and the high molecular water-absorbing resin with different proportions in the plurality of isolation chambers are continuously stacked to form the absorption core of the gradient mixed incontinence pad.
Description
Technical Field
The invention belongs to the field of hygiene and nursing products, and particularly relates to a gradual-suction incontinence pad and a preparation method and application thereof.
Background
Urinary incontinence is a common disease which is also medically known as urinary incontinence. Urinary incontinence is the inability of urine to flow through the urethral orifice on its own accord with a sudden increase in pressure within the patient's abdominal cavity. In real life, a sanitary article frequently used by urinary incontinence sufferers is an incontinence pad, which is used for the absorption of involuntary urine. Such hygiene articles have the following structure and corresponding functions:
1. incontinence pad absorbent core: the urine is quickly absorbed, and the urine is dry and does not reversely permeate;
2. incontinence pad leak protection parting line: preventing urine from leaking laterally;
3. incontinence pad cotton top layer: comfortable skin;
4. incontinence pad carrier film: moisture and steam permeation and exhaust;
5. applying gum to the incontinence pad: securing the incontinence pad position.
Since the incontinence pad has a main function of absorbing urine, the most important structure of the above structures and corresponding functions of the incontinence pad is an absorbent core, which is generally required to have a function of rapid absorption, dryness and no reverse osmosis.
Existing incontinence pad absorbent cores have the following properties:
1. the absorbent core material is usually selected from fluff fiber and high molecular water absorbent resin. Compared with the absorption core of the sanitary towel, the specific gravity of the high molecular water-absorbing resin in the absorption core of the incontinence pad is greatly improved;
2. the Absorbent core is manufactured by a negative pressure molding method, in which fluff fibers and Super Absorbent Polymer (SAP) are uniformly mixed.
Although both incontinence pads and sanitary napkins are sanitary products, their primary function is liquid absorption. However, incontinence pads absorb urine, while sanitary napkins absorb blood. It is well known that urine and blood are two substances with different compositions and different properties: blood contains exfoliated epithelial tissue, blood cells, proteins, water, inorganic salts, glucose, urea, etc.; while urine mainly contains only water, inorganic salts and urea.
The proportion of the polymeric water-absorbing resin in the absorbent core materials of the incontinence pad and the sanitary napkin will vary based on the different components contained in the urine and blood. Specifically, the proportion of water in urine is much greater than that in blood, so that the specific gravity of the polymeric water-absorbent resin in the absorbent core of the incontinence pad is greatly increased compared with that of the absorbent core of the sanitary napkin.
Although the specific gravity of the polymeric water-absorbent resin in the absorbent core of the incontinence pad is greatly increased compared with that of the absorbent core of the sanitary towel, the absorbent core of the incontinence pad in the prior art generally adopts a processing and manufacturing method of the absorbent core of the sanitary towel, namely a negative pressure molding manufacturing method of uniformly mixing fluff fibers and the polymeric water-absorbent resin. For example, the fibrous layer disclosed in US6675702 is a mixture of a fibrous fabric and a polymer, and the polymer content is in the range of 0.5% to 70%.
The absorbent core of the incontinence pad, which is formed by uniformly mixing the fluff fibers and the high-molecular water-absorbent resin, can immediately absorb and retain urine by the high-molecular water-absorbent resin close to the surface layer after the urine is guided by the fluff fibers. Therefore, the absorbent core of the incontinence pad obtained by the manufacturing method can always keep a wet state on the surface layer of the absorbent core because the part of the absorbent core close to the surface layer absorbs and retains water, and the absorbent core achieves the function of quick absorption of the incontinence pad, but cannot give consideration to the function of dryness and non-reverse osmosis of the incontinence pad, so that the uniform mixing structure of the fluff fibers and the high polymer water-absorbing resin does not meet all functional requirements of the absorbent core of the incontinence pad.
In the prior art, there is also a method for manufacturing a multi-layer structure absorbent core, for example, chinese patent application No. 201410036303.9 discloses a multi-layer structure absorbent core for a nursing pad and a method for manufacturing the same. The absorbent core of this document achieves a fast absorption, dry and non-rewet function by providing a multi-layer structure, but the structure of the incontinence pad core disclosed in this document is multi-layered, resulting in an excessive core thickness. Incontinence pads comprising a core of excessive thickness also have a high liquid absorption and are not suitable for light incontinence sufferers, also for medium and heavy incontinence sufferers and even more for incontinence sufferers in summer.
In summary, how to improve the defects of the prior art, by changing the mixed structure of the fluff fibers and the high molecular water-absorbing resin, an incontinence pad absorbent core with light thickness, quick absorption, dryness and no reverse osmosis is obtained, so as to be suitable for light, medium and heavy incontinence patients to use simultaneously, and for the incontinence patients to use in summer, which is a technical problem to be solved in the field urgently.
Disclosure of Invention
The invention provides an absorption core, which is formed by mixing high-molecular water-absorbing resin and fluff fiber; the high-molecular water-absorbent resin is distributed in a gradient manner along the longitudinal section direction of the absorption core.
Wherein, the step distribution means that the average share of the high molecular water-absorbing resin shows a trend from low to high or from high to low on the whole along the longitudinal section direction of the absorption core.
According to an embodiment of the present invention, the absorbent core may be composed of N unit faces divided in a direction perpendicular to the longitudinal section, each unit face being formed by mixing the high molecular water-absorbent resin and the fluff fiber, and the average fraction of the high molecular water-absorbent resin in the unit faces shows a gradient trend from low to high or from high to low as a whole from the first unit face to the nth unit face;
wherein N is more than or equal to 2; for example N.gtoreq.3, further for example N is from 3 to 10, as examples N =3, 4, 5, 6.
According to an embodiment of the present invention, the maximum value of the average portion of the high molecular water absorbent resin among the N unit faces is 1.5 to 8 times, for example, 2 to 6 times, as exemplified by 1.5 times, 2 times, 2.5 times, 3 times, 3.5 times, 4 times, 5 times, of the minimum value of the average portion thereof.
According to an embodiment of the present invention, the average share means a quotient of the high molecular water-absorbent resin divided by the total weight of all substances in the cell face in the respective cell face.
According to the embodiment of the present invention, the polymeric water absorbent resin in each unit surface may be uniformly distributed or non-uniformly distributed, preferably uniformly distributed.
Since the gradient change of the polymeric water-absorbent resin in the absorbent core tends to be an integral trend, it can be understood by those skilled in the art that when the value of N is large (for example, N ≧ 8, 10, 15, 20, or 30), there may be cases where the share of the polymeric water-absorbent resin in one or several adjacent cell faces is almost the same, and there may also be cases where the change is reversed in the gradient. Likewise, the average share of the high-molecular water-absorbent resin in the non-adjacent cell faces may be almost the same or there may be a case where there is a reverse gradient change.
Preferably, the average share of the high molecular water absorbent resin in the adjacent unit faces is different.
According to the embodiment of the present invention, the difference in the average share of the high molecular water absorbent resin in the adjacent unit faces is the same or different. When the difference between the average contents of the high molecular water-absorbent resins in the adjacent unit faces is the same, it means that the average contents of the high molecular water-absorbent resins from the first unit face to the Nth unit face are increased or decreased in an equal difference manner. When the difference in the average share of the high-molecular water-absorbent resin in the adjacent unit faces is different, it means that the average share of the high-molecular water-absorbent resin increases or decreases in unequal difference from the first unit face to the Nth unit face.
According to an embodiment of the invention, the absorbent core has a thickness of not more than 3mm, preferably 1-2mm.
According to an embodiment of the present invention, the particle size of the polymeric water absorbent resin is 100 to 120 mesh.
According to the embodiment of the invention, the pH value of the high molecular water absorbent resin is 6-8. Further, the high molecular water-absorbing resin can be selected from polyacrylic resin materials, or other types of resins known in the art; for example, pasteur 7059, sandaya 930NP, sumitomo 60S, etc. can be used.
According to an exemplary embodiment of the present invention, the absorbent core is composed of four unit faces divided in a direction perpendicular to the longitudinal section, each unit face being formed by the mixed packing of the high-molecular water-absorbent resin and the fluff fiber; from the first unit surface to the fourth unit surface, the average share of the high polymer water-absorbent resin on the unit surfaces shows a gradient change trend from low to high or from high to low;
in the four unit surfaces, the maximum value of the average share of the high molecular water-absorbent resin is 2-6 times of the minimum value of the average share of the high molecular water-absorbent resin.
The invention also provides a preparation method of the absorbent core, which comprises the following steps:
the mixture of the fluff fiber and the high-molecular water-absorbent resin collides with the high-pressure micro-mist particles moving at high speed, and after the friction and the speed reduction, the high-molecular water-absorbent resin sinks in steps and is continuously accumulated with the fluff fiber to obtain the absorption core;
the initial movement direction of the high-pressure micro-fog particles is opposite to the initial movement direction of the mixture of the fluff fibers and the high-molecular water-absorbent resin;
the initial movement direction is preferably perpendicular to the sinking direction.
According to the embodiment of the invention, the mixture of the fluff fibers and the high-molecular water-absorbing resin and the high-pressure micro-mist particles moving at high speed sink in a gradient manner after collision and friction speed reduction in the forming bin and are continuously accumulated.
Preferably, the stepped sinking may be achieved by: arranging N-1 partition plates in the molding bin, dividing the molding bin into N settling zones, wherein the shares of the high-molecular water-absorbent resins in the adjacent settling zones are the same or different, preferably different; wherein N is more than or equal to 2; for example N.gtoreq.3, and as a further example N is 3-10, as examples N =3, 4, 5, 6.
Preferably, the spacing between adjacent baffles is the same or different, preferably the same.
According to an embodiment of the present invention, the preparation of the mixture of the fluff fiber and the polymeric water absorbent resin includes: the fluff fiber with the speed of 5-10m/s and the high molecular water-absorbing resin fed by compressed gas are fully mixed in the pipeline until the fluff fiber and the high molecular water-absorbing resin are uniformly dispersed.
Further, the fluff fiber with the speed of 5-10m/s can be from the following sources: the defibrator rotates to generate kinetic energy, the kinetic energy drives airflow in the defibrator to flow, the airflow speed range is 5-10m/s, the fluff fiber speed range is 5-10m/s, and the fluff fiber after defibering is driven by the airflow in the defibrator and enters the pipeline to be mixed with the macromolecular water-absorbing resin entering the pipeline.
Further, the pressure of the compressed air is preferably 2 to 6kg/cm 2 . A polymeric water-absorbent resin with a particle size of 100 to 120 meshes (a polymeric water-absorbent resin with a metric conversion of 150 to 120 μm)The compressed air enters the pipeline and is mixed with the fluff fiber entering the pipeline;
according to the characteristic that gas flows from a high-pressure area to a low-pressure area, the high-molecular water-absorbent resin driven by compressed air is fully mixed with fluff fibers driven by airflow in a fiber-opening machine in a pipeline, and a mixture (also called mixed airflow) in which the fluff fibers and the high-molecular water-absorbent resin are uniformly mixed is obtained.
According to an embodiment of the present invention, the high pressure fine mist particles may be prepared by a high pressure fine mist apparatus known in the art. The movement speed of the high-pressure micro-mist particles is regulated and controlled by controlling the pressure in the high-pressure pipeline; generally, the higher the atomization pressure, the greater the high pressure fine mist particle velocity. Preferably, the pressure in the high-pressure pipeline ranges from 30 to 70kg/cm 2 The moving speed of the corresponding high-pressure micro-mist particles is 30-40m/s. Preferably, the high pressure fine mist particles have a particle size of 10 to 20 μm (e.g., 15 μm).
According to an embodiment of the present invention, the polymeric water absorbent resin contains no water.
According to the embodiment of the present invention, the stepped settlement mainly refers to the stepped settlement of the polymeric water absorbent resin.
In the preparation method of the absorption core, the high-molecular water-absorbent resin and the high-pressure micro-mist particles in the mixed airflow collide with each other and rub with each other, then the speed is rapidly and gradually reduced and the high-molecular water-absorbent resin falls down, the proportion of the high-molecular water-absorbent resin in the air in a settling area is gradually reduced along with the continuous increase of the falling high-molecular water-absorbent resin, and the fluff fibers in the mixed airflow continuously advance along with the mixed airflow and are gradually reduced along with the lengthening of the advancing route of the mixed airflow.
According to the embodiment of the invention, the fluff fibers are continuously piled after being sucked by negative pressure, and are preferably piled in the forming bin.
According to a preferred embodiment of the present invention, the method of making the absorbent core comprises the steps of:
the mixture of the fluff fibers and the high-molecular water-absorbent resin and the high-pressure micro-mist particles moving at high speed collide in a forming bin, and after the mixture is subjected to friction and speed reduction, the high-molecular water-absorbent resin sinks in a gradient manner and is continuously accumulated with the fluff fibers to obtain the absorption core;
wherein, N-1 clapboards are arranged in the molding bin to divide the molding bin into N settling zones, and the shares of the high molecular water-absorbent resin in the adjacent settling zones are the same or different, preferably different;
n is more than or equal to 2; for example N.gtoreq.3, and as a further example N is from 3 to 10, as examples N =3, 4, 5, 6;
the initial movement direction of the high-pressure micro-mist particles is opposite to the initial movement direction of the mixture of the fluff fibers and the high-molecular water-absorbent resin, and the initial directions are all vertical to the sinking direction;
preferably, the moving speed of the high-pressure micro-mist particles is 30-40m/s; preferably, the velocity of movement of the pile fibers is from 5 to 10m/s.
The invention also provides an absorbent core prepared by the method.
The invention also provides the use of the absorbent core in a hygiene article. Preferably, the hygiene article comprises, but is not limited to, an incontinence pad, a nursing pad, a surgical pad, preferably an incontinence pad.
The invention also provides an incontinence pad comprising an absorbent core as described above.
According to an embodiment of the invention, the incontinence pad comprises a surface layer, the absorbent core and a backsheet;
the absorption core is positioned in a space formed by hot pressing the surface layer and the bottom layer.
According to an embodiment of the present invention, the unit face of the absorbent core having the smallest average share of the high molecular water-absorbent resin is in contact with the surface layer.
According to an embodiment of the invention, the surface layer is a layer that is in contact with the skin of the subject. Preferably, the material of the surface layer is a non-woven fabric material. The skin layer has the following characteristics:
the weight is light: has fluffiness and good hand feeling;
softening: the finished product is moderate in softness and comfortable because of being composed of fine fibers;
ventilating: the cloth cover is not absorbent, has zero water content, porosity and good air permeability, is easy to keep the cloth cover dry and is easy to wash;
the product does not contain other chemical components, has stable performance, no toxicity, no peculiar smell and no irritation to skin.
According to the embodiment of the invention, the bottom layer is made of a waterproof breathable film.
Wherein, the using object can be a light, medium and heavy incontinence patient or an intraoperative incontinence patient; including but not limited to infants, juveniles, and adults.
The invention also provides a preparation method of the incontinence pad, which comprises the following steps: and (3) assembling the absorbent core, the surface layer and the bottom layer in a hot pressing manner to obtain the incontinence pad.
The invention has the beneficial technical effects that:
in the absorption core provided by the invention, the high molecular water-absorbing resin is distributed in a gradient manner along the longitudinal section direction of the absorption core, the number of the fluff fibers in the unit surface close to the surface layer is large, and the share of the high molecular water-absorbing resin is gradually increased along with the unit layer closer to the bottom layer. Urine reaches the absorption core through the surface layer, is absorbed and guided by the fluff fiber, and is absorbed by the macromolecular water-absorbing resin distributed in a gradient way. Not only can be quickly absorbed, but also can be dry and comfortable without reverse osmosis. Incontinence pads containing the absorbent core are suitable for use by light, medium and heavy incontinent persons. In addition, the incontinence pad is light and thin in thickness and is suitable for being used by incontinence patients in summer.
The preparation method of the absorption core provided by the invention utilizes the physical principle that the kinetic energy of a low-speed object is lower than that of a high-speed object, namely, the high-speed high-pressure micro-mist particles knock down the low-speed high-molecular water-absorbent resin, so that the high-molecular water-absorbent resin in the absorption core in the forming bin with the partition plates is in a gradient mixed manner from high to low to form the incontinence pad absorption core.
The equipment used by the preparation method has simple structure, and the forming bin and the high-pressure micro-mist equipment are both low in price and have industrial practicability.
Drawings
FIG. 1 is a schematic illustration of the method of making an absorbent core of the incontinence pad of example 1;
fig. 2 is a schematic illustration of a cross-section of an absorbent core of the incontinence pad of example 1.
Reference numerals are as follows:
1-mixed gas of high-molecular water-absorbent resin and fluff fiber, 2-high-pressure micro-fog particles, 3-collision deceleration zone, 3.1-micro high-molecular water-absorbent resin particles, 3.2-small amount of high-molecular water-absorbent resin particles, 3.3-medium-molecular water-absorbent resin particles, 3.4-large amount of high-molecular water-absorbent resin particles, 4-settling zone, 5-absorption core, 6-third partition plate, 7-second partition plate, 8-third partition plate, 9-forming bin, 10-product output section, 11-hole belt, 12-negative pressure bin, 13-driven wheel and 14-driving wheel.
Detailed Description
The preparation method of the incontinence pad absorption core provided by the invention utilizes the physical principle that kinetic energy of a low-speed object is lower than that of a high-speed object to knock down the low-speed high-molecular water-absorbent resin by high-pressure micro-mist particles moving at a high speed, so that the high-molecular water-absorbent resin in the absorption core is low in high phase, and the incontinence pad absorption core with gradient mixing/distribution is formed.
The echelon distribution is as follows: along the longitudinal section direction of the absorption core, the average share of the high molecular water-absorbing resin shows a trend from low to high or from high to low on the whole; for example, the backsheet has the highest concentration of superabsorbent polymer and the topsheet (the layer in contact with the topsheet of the incontinence pad) has the lowest concentration of superabsorbent polymer.
During preparation, the fluff fibers can be accumulated at the bottom of the forming bin by utilizing the suction of the negative pressure bin, and the thickness of the absorption core can be controlled, so that the incontinence pad absorption core formed by mixing the fluff fibers with the high-molecular water-absorbent resin in a gradient manner is obtained. Considering that urine of an incontinent patient has the characteristics of high flow speed and large flow compared with blood, when a large amount of urine is on the top layer of the absorption core of the incontinent pad, because the content of the macromolecular water-absorbing resin on the top layer of the absorption core of the incontinent pad is minimum by the gradient mixing, most of the urine is quickly guided to the bottom layer of the absorption core by the fluff fiber in the absorption core, most of the urine is absorbed by the macromolecular water-absorbing resin on the bottom layer of the absorption core, and other layers can be kept dry and comfortable without affecting the normal use of the incontinent pad; when the urine is present again, the urine is continuously guided by the fluff fibers in the absorption core, till the bottom layer, the secondary bottom layer and the secondary bottom layer, \8230, and the adsorption is saturated in sequence. Therefore, the absorption core formed by mixing the fluff fiber and the high polymer water-absorbing resin in a gradient manner can realize the functions of rapid urine absorption, dryness and no reverse osmosis.
In the method for preparing the absorption core, the water used for preparing the high-pressure micro-mist particles is purified water, and the purified water is mainly used because the purified water does not contain impurities and salt substances and does not block an atomizing nozzle. The high-pressure micro-fog particles are generated by pressurizing purified water which is subjected to super-strong filtering and purifying treatment to 30-70kg/cm by using a high-pressure pump 2 Pressurized water is delivered to a 'superfine' nozzle with the aperture of 0.1 mm through a high-pressure pipeline for atomization, and the nozzle rotates at a high speed, the high-pressure micro-mist nozzle can generate 50 hundred million mist drops per second, and high-pressure micro-mist particles with the particle size of 3-15 mu m are sprayed to the whole space, so that the high-pressure micro-mist nozzle can be quickly vaporized and diffused from the air.
The existing high-pressure micro-mist device can be used, the power of atomized 1 kilogram of purified water is only 6W, the power is one percent of that of the traditional electric heating humidifier, and the energy is saved. The water in the high-pressure micro-mist system is used in a sealed and non-recycled way, so that the propagation of bacteria can not be caused. The high-pressure micro-mist device has large mist spraying amount and can be freely combined, the output flow of the ultra-high pressure micro-mist system pump station ranges from 100kg/h to 1600kg/h, stepless adjustment can be carried out, the spray head can be freely configured in the flow range, and the humidification precision can be adjusted by random combination.
The uniform mixing of the high molecular water-absorbent resin and the fluff fiber is very important, which is directly related to the size of the liquid absorption performance of the product and the uniformity of liquid absorption, and can also avoid the high molecular water-absorbent resin from generating gel adhesion or being bonded into a hard spot to prick the surface layer of the sanitary product, and simultaneously prevent the high molecular water-absorbent resin from generating sliding in the absorption core.
Therefore, before the high-molecular water-absorbing resin and the fluff fiber are uniformly mixed, the dryness of the high-molecular water-absorbing resin particles must be kept, which directly influences the metering, transportation and dispersion of the high-molecular water-absorbing resin and the mixing uniformity of the high-molecular water-absorbing resin and the fluff fiber. Meanwhile, when the particle size of the polymer water-absorbent resin is 100-120 meshes, the absorption capacity is optimal; the absorption rate is maximum when the pH value is 6-8.
The bottom layer of the incontinence pad of the present invention is a waterproof, breathable membrane. Under the state of water vapor, water particles are very fine, and can smoothly permeate into the capillary to the other side according to the principle of capillary motion, so that the vapor permeation phenomenon is generated. When water vapor is condensed into water drops, the particles become bigger, and due to the action of the surface tension of the water drops (mutual pulling and balancing among water molecules), the water molecules can not be smoothly separated from the water drops and permeate to the other side, so that the water permeation is prevented, and the vapor permeable membrane has a waterproof function. The waterproof breathable film applied to the invention can build a reliable barrier for preventing virus and bacteria pollution under the condition of not influencing airflow, thereby ensuring the health of incontinence patients.
In addition, as can be understood by those skilled in the art, the partition board is arranged in the molding bin, so as to keep a stable sedimentation ratio of the high molecular water-absorbent resin which is sedimented in a certain ratio; the number of the partition plates is not limited to 3, and may be more. More separators can make the high molecular water-absorbent resin settled form more steps.
The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The starting materials and components used in the following examples are commercially available or known in the art, unless otherwise specified.
Example 1
Method for preparing an absorbent core for incontinence pads: as shown in FIG. 1, the mixed gas 1 of the high molecular water-absorbent resin and the fluff fiber enters the upper part of the molding chamber 9, and simultaneously, the high-pressure fine mist particles 2 in the opposite direction enter the same layer of the molding chamber. The forming bin comprises a collision deceleration zone 3 and a settling zone 4, and the settling zone 4 is divided into four settling areas by a first partition plate 8, a second partition plate 7 and a third partition plate 6.
The high-molecular water-absorbent resin particles in the mixed gas 1 of the high-molecular water-absorbent resin and the fluff fibers collide with the high-pressure micro-mist particles 2 in a collision deceleration zone 3 in the forming bin. The high-molecular water-absorbent resin particles and the high-pressure micro-mist particles in the mixed airflow collide with each other and are rapidly and gradually reduced in speed and fall down after friction, and the proportion of the high-molecular water-absorbent resin in the air is gradually reduced along with the continuous increase of the falling high-molecular water-absorbent resin particles. After collision, a large amount of the high molecular water absorbent resin particles 3.4 are firstly settled in the settling zone 4, then the medium high molecular water absorbent resin particles 3.3 are settled in the settling zone 4, then a small amount of the high molecular water absorbent resin particles 3.2 are settled in the settling zone 4, and finally the trace high molecular water absorbent resin particles 3.1 are settled in the settling zone 4, so that the high molecular water absorbent resins with different unit density ratios are formed.
During the sedimentation process of the high molecular water-absorbing resin particles, the fluff fibers in the mixed airflow continuously move forward along with the mixed airflow, and the mixed airflow gradually decelerates along with the lengthening of the advancing route of the mixed airflow during the moving forward process. The fluff fiber in the mixed air flow is accumulated at the bottom of the forming bin 9 by the suction in the negative pressure bin 12, and further accumulated on the hole belt 11 of the product output section 10, and meanwhile, the settled high molecular water-absorbent resin with different unit density proportions is also accumulated on the hole belt 11 of the product output section 10, thereby forming the absorption core 5 of the gradient mixing of the high molecular water-absorbent resin.
The absorbent cores 5 are continuously discharged to the next step by the perforated belt 11 driven by the driven wheel 13 and the driving wheel 14.
The cross section of the absorbent core 5 produced by the above method is divided into four layers (as shown in fig. 2), and the proportion of the polymeric water-absorbent resin particles in each layer is different. Wherein, the uppermost layer contains micro high molecular water-absorbing resin particles 3.1, the second layer contains a small amount of high molecular water-absorbing resin particles 3.2, the third layer contains middle high molecular water-absorbing resin particles 3.3, and the bottom layer contains a large amount of high molecular water-absorbing resin particles 3.4.
Example 2
A progressive incontinence pad comprising a topsheet, an absorbent core as shown in example 1, and a backsheet; the absorption core is positioned in the space formed by the surface layer and the bottom layer through hot pressing.
The unit surface (i.e. the uppermost layer containing the trace amount of the polymeric water-absorbent resin particles) with the smallest average content of the polymeric water-absorbent resin in the absorbent core is in contact with the surface layer, which is in contact with the skin of the subject;
the material on the surface layer is non-woven fabric material, and the material on the bottom layer is waterproof and breathable film.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. An absorption core, which is characterized in that the absorption core is formed by mixing high molecular water-absorbing resin and fluff fiber; the high-molecular water-absorbing resin is distributed in a gradient manner along the longitudinal section direction of the absorption core.
2. The absorbent core according to claim 1, wherein said absorbent core is composed of N unit faces divided in a direction perpendicular to said longitudinal section, each unit face being formed by mixing said high molecular water-absorbent resin and fluff fibers, and the average fraction of said high molecular water-absorbent resin in the unit faces shows a gradient tendency from low to high or from high to low as a whole from the first unit face to the nth unit face;
wherein N is more than or equal to 2; for example, N.gtoreq.3, and further for example, N is 3 to 10.
Preferably, the maximum value of the average share of the high molecular water absorbent resin in the N unit faces is 1.5 to 8 times, for example, 2 to 6 times of the minimum value of the average share.
Preferably, the polymeric water-absorbent resin in each unit face is uniformly or non-uniformly distributed.
3. An absorbent core according to claim 2, characterized in that the average share of the high molecular water-absorbing resin in adjacent cell planes is different.
Preferably, the difference in the average share of the high molecular water absorbent resin in the adjacent unit faces is the same or different.
Preferably, the thickness of the absorbent core is not more than 3mm, preferably 1-2mm.
4. The absorbent core according to any of claims 1 to 3, wherein said absorbent core is composed of four unit faces divided in a direction perpendicular to said longitudinal section, each unit face being formed by the mixed accumulation of said water-absorbent polymer resin and fluff fibers; from the first unit surface to the fourth unit surface, the average share of the high polymer water-absorbent resin on the unit surfaces shows a gradient change trend from low to high or from high to low;
in the four unit surfaces, the maximum value of the average share of the high molecular water-absorbent resin is 2-6 times of the minimum value of the average share of the high molecular water-absorbent resin.
5. A method of making an absorbent core according to any of claims 1 to 4, characterized in that said method of making comprises the steps of:
the mixture of the fluff fiber and the high-molecular water-absorbent resin collides with the high-pressure micro-mist particles moving at high speed, and after the friction and the speed reduction, the high-molecular water-absorbent resin sinks in steps and is continuously accumulated with the fluff fiber to obtain the absorption core;
the initial movement direction of the high-pressure micro-fog particles is opposite to the initial movement direction of the mixture of the fluff fibers and the high-molecular water-absorbent resin;
the initial movement direction is preferably perpendicular to the sinking direction.
6. The preparation method according to claim 5, wherein the mixture of the fluff fibers and the high-molecular water-absorbent resin and the high-pressure fine mist particles moving at high speed sink in steps after collision, friction and speed reduction in the forming bin and are continuously accumulated.
Preferably, the stepped sinking is achieved by: arranging N-1 partition plates in the molding bin, dividing the molding bin into N settling zones, wherein the shares of the high-molecular water-absorbent resins in the adjacent settling zones are the same or different, preferably different; wherein N is more than or equal to 2; for example, N.gtoreq.3, and further for example, N is 3 to 10.
Preferably, the spacing between adjacent baffles is the same or different, preferably the same.
Preferably, the preparation of the mixture of the fluff fibers and the high-molecular water-absorbing resin comprises the following steps: the fluff fiber with the speed of 5-10m/s and the high molecular water-absorbing resin fed by compressed gas are fully mixed in the pipeline until the fluff fiber and the high molecular water-absorbing resin are uniformly dispersed.
Preferably, the moving speed of the high-pressure fine fog particles is 30-40m/s.
7. The method of manufacturing of claim 5, wherein said absorbent core is manufactured by a method comprising the steps of:
the mixture of the fluff fibers and the high-molecular water-absorbent resin and the high-pressure micro-mist particles moving at high speed collide in a forming bin, and after the mixture is subjected to friction and speed reduction, the high-molecular water-absorbent resin sinks in a gradient manner and is continuously accumulated with the fluff fibers to obtain the absorption core;
wherein, N-1 clapboards are arranged in the molding bin to divide the molding bin into N settling zones, and the shares of the high molecular water-absorbent resin in the adjacent settling zones are the same or different, preferably different;
n is more than or equal to 2; for example, N is not less than 3, and for example, N is 3 to 10;
the initial movement direction of the high-pressure micro-mist particles is opposite to the initial movement direction of the mixture of the fluff fibers and the high-molecular water-absorbent resin, and the initial directions are all vertical to the sinking direction;
preferably, the movement speed of the high-pressure micro-mist particles is 30-40m/s; preferably, the velocity of movement of the pile fibers is from 5 to 10m/s.
8. Use of an absorbent core according to any of claims 1 to 4 in a hygiene article.
Preferably, the hygiene article includes, but is not limited to, incontinence pads, nursing pads, surgical pads.
9. An incontinence pad characterized in that it comprises an absorbent core according to any of claims 1-4.
Preferably, the incontinence pad comprises a surface layer, the absorbent core and a backsheet;
the absorption core is positioned in a space formed by hot pressing the surface layer and the bottom layer.
Preferably, the unit surface of the absorbent core, which has the smallest average share of the high molecular water-absorbent resin, is in contact with the surface layer, which is a layer in contact with the skin of a subject.
10. A method of making an incontinence pad as defined in claim 9, said method comprising the steps of: assembling the absorbent core, the topsheet and the backsheet according to any one of claims 1 to 4 by hot pressing to obtain the incontinence pad.
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| CN202110621626.4A CN115429542A (en) | 2021-06-03 | 2021-06-03 | Gradually-sucking incontinence pad and preparation method and application thereof |
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| CN202110621626.4A CN115429542A (en) | 2021-06-03 | 2021-06-03 | Gradually-sucking incontinence pad and preparation method and application thereof |
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| US20070112319A1 (en) * | 2004-07-02 | 2007-05-17 | Sca Hygiene Products Ab | Absorbent Layer Structure |
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| CN105395320A (en) * | 2015-12-31 | 2016-03-16 | 北京倍舒特妇幼用品有限公司 | Device and method thereof for manufacturing die wheel laminar flow mixed absorption core |
| CN110338976A (en) * | 2019-07-11 | 2019-10-18 | 博爱（中国）膨化芯材有限公司 | A kind of super soft efficient absorption core of air-laid process manufacture |
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2021
- 2021-06-03 CN CN202110621626.4A patent/CN115429542A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030073968A1 (en) * | 2001-08-16 | 2003-04-17 | Driskell Stacy Jean | System and method for absorbent core production |
| US20070112319A1 (en) * | 2004-07-02 | 2007-05-17 | Sca Hygiene Products Ab | Absorbent Layer Structure |
| CN103948471A (en) * | 2014-04-29 | 2014-07-30 | 瑞光（上海）电气设备有限公司 | Absorptive core, absorptive core molding equipment and absorptive core manufacture method |
| CN105395320A (en) * | 2015-12-31 | 2016-03-16 | 北京倍舒特妇幼用品有限公司 | Device and method thereof for manufacturing die wheel laminar flow mixed absorption core |
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