Three-dimensional grid reverse osmosis absorption core

Abstract

The utility model relates to sanitary article technical field especially, more particularly to a kind of three-dimensional grid reverse osmosis absorption core body.A kind of three-dimensional grid reverse osmosis absorption core body, including the anti-reverse osmosis net of grid-shaped anti-reverse osmosis layer being provided with, the flow guide layer being provided below the anti-reverse osmosis layer, the anti-side leakage layer between the anti-reverse osmosis layer and the flow guide layer are provided and the water-locking layer being provided below the flow guide layer.The utility model is equipped with anti-reverse osmosis net on absorption core body, when the limited water absorption of core body or under pressure condition, when reverse osmosis phenomenon appears, liquid is absorbed in time by the foamed anti-reverse osmosis net with three-dimensional structure, to effectively avoid liquid overflow, anti-reverse osmosis net is grid-shaped structure, uneven surface can make air enter, make surface keep dry at the same time, prevent core body and human body from sticking, realize convenient replacement.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, and in particular to a three-dimensional mesh reverse osmosis absorption core. Background Technology

[0002] Disposable diapers are disposable hygiene products used by infants or adults. With technological advancements, diapers have been continuously improved, offering excellent practicality, primarily based on cotton comfort, breathability, and leak-proof properties. Current diapers typically use a absorbent core filled with superabsorbent polymer (SAP) fibers and fluff pulp, both of which are hydrophilic and have good liquid absorption. However, after these SAP fibers and fluff pulp swell from absorbing liquid, their absorbency decreases significantly. Furthermore, these liquids are highly susceptible to backflow under pressure. Current technologies lack sufficient improvements in leak-proofing the core surface. Utility Model Content

[0003] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a three-dimensional mesh reverse osmosis absorption core. An anti-reverse osmosis mesh is added to the absorption core. When the core has limited water absorption or is under pressure and reverse osmosis occurs, the foamed anti-reverse osmosis mesh with a three-dimensional structure can absorb the liquid in time, thereby effectively preventing liquid overflow. The anti-reverse osmosis mesh has a mesh structure and an uneven surface that allows air to enter, keeping the surface dry and preventing the core from sticking to the human body, thus enabling convenient replacement.

[0005] This utility model provides a three-dimensional mesh reverse osmosis absorption core, including a reverse osmosis layer with a mesh-like anti-reverse osmosis net, a flow guiding layer disposed below the reverse osmosis layer, a side leakage prevention layer disposed between the reverse osmosis layer and the flow guiding layer, and a water-locking layer disposed below the flow guiding layer; the reverse osmosis net is a foamed sheet with a 3D three-dimensional shape and the cross-section of the wire of the reverse osmosis net is circular. The periphery of the reverse osmosis net is bonded to the flow guiding layer and the side leakage prevention layer by an embossing process. The side leakage prevention layer is sheet-shaped and is disposed on both sides of the flow guiding layer and extends inward. A recess is provided between the two side leakage prevention layers.

[0006] The anti-reverse osmosis mesh with a three-dimensional structure has an absorption function for liquids. When the core has limited water absorption or is under pressure and reverse osmosis occurs, the anti-reverse osmosis mesh on the surface overflows the liquid for absorption. With a small contact area, the absorption speed is fast. At the same time, the anti-reverse osmosis mesh has a grid-like structure and an uneven surface that allows air to enter, keeping the surface dry and preventing the core from sticking to the human body, thus enabling easy replacement. The anti-leakage layer and the flow guiding layer work together to guide and absorb the liquid, while the water-locking layer on the bottom absorbs the liquid overall.

[0007] In some embodiments, the anti-reverse osmosis mesh has a closed-cell structure with independent air bubbles, a density of 0.01-0.15 g / cm³, and a wire diameter of 0.5-5 mm. The closed-cell structure with independent air bubbles maintains its three-dimensional structure while also providing elasticity under dry conditions. When liquid enters, the internal air bubbles fill the liquid, achieving rapid absorption.

[0008] In some embodiments, the guide layer is provided with guide holes at intervals, the guide holes being recessed downwards with arc-shaped sides. The recessed guide holes are used to guide liquid to quickly enter the underlying water-locking layer, which facilitates rapid absorption by the water-locking layer while the guide layer itself also has a certain absorption capacity, capable of absorbing liquid that seeps in both the forward and reverse directions.

[0009] In some embodiments, several vent holes are arranged in a ring around the air guide hole, and the depth of the vent holes is less than the depth of the air guide hole. The ring distribution of the vent holes increases the contact area with air, avoids the core from sticking to the skin, improves breathability, and at the same time, works with the air guide hole to enhance the appearance of the core.

[0010] In some embodiments, both the flow guide hole and the vent hole are formed by an embossing process. The flow guide hole and vent hole formed by embossing do not damage the structure of the flow guide layer itself, but can also increase the density of the embossed area, making its structure more robust and preventing the entire flow guide layer from deforming and falling apart after absorbing water and expanding.

[0011] In some embodiments, the flow-guiding layer is provided with anti-leakage locking edges on both sides. Each anti-leakage locking edge includes an arc-shaped protective strip and a raised strip. The arc-shaped protective strip has spaced arc-shaped recesses that curve outwards. The raised strip is located outside the arc-shaped protective strip and is higher than it. The anti-leakage locking edges are used to block liquid leakage from the sides. The arc-shaped protective strip with spaced arc-shaped recesses blocks the liquid and guides it back into the interior. Simultaneously, the upper anti-leakage layer can absorb the liquid in a timely manner, effectively preventing side leakage. The raised strip provides final protection.

[0012] In some embodiments, a matching groove is formed on the bottom side of the anti-leakage layer at a position corresponding to the anti-leakage locking edge. The matching groove is adapted to the anti-leakage locking edge. After the anti-leakage layer and the anti-leakage locking edge are correspondingly bonded, a solvent is coated on the side. The correspondingly provided matching groove is used to accommodate the anti-leakage locking edge, avoiding unevenness at the chip edge during the imprinting process. At the same time, since liquid is prone to seepage at this location, the coating of solvent on the basis of imprinting increases its locking ability and prevents liquid seepage at this location.

[0013] In some embodiments, the water-locking layer is filled with a filler formed by mixing superabsorbent polymer particles and fluff pulp. The filler formed by mixing superabsorbent polymer particles and fluff pulp is a common material for water-locking layers, used to absorb infiltrated liquids; specific details can be found in existing technologies, and will not be elaborated upon here.

[0014] In some embodiments, a leak-proof bottom membrane is also included, which is disposed below the water-locking layer, and the water-locking layer and the leak-proof bottom membrane are bonded together by a solvent. Since the leak-proof bottom membrane is made of polyethylene, a solvent is applied to achieve an overall connection to ensure the adhesion between the water-locking layer and the leak-proof bottom membrane, and the edges are further reinforced with embossing to increase its stability.

[0015] In some embodiments, the leak-proof bottom film is made of high-density polyethylene. The leak-proof bottom film made of polyethylene is used to support the water-locking layer and prevent liquid leakage to the outside. Leak-proof bottom films made of polyethylene are a common feature in diapers; their specific structure and materials can be found in existing technology and will not be elaborated upon here.

[0016] By adopting the above technical solution, the beneficial effects of this utility model are:

[0017] This invention adds an anti-backflow mesh to the absorbent core. When the core has limited water absorption or is under pressure and backflow occurs, the foamed anti-backflow mesh with a three-dimensional structure absorbs the liquid in time, thereby effectively preventing liquid overflow. The anti-backflow mesh has a mesh structure and an uneven surface that allows air to enter, keeping the surface dry and preventing the core from sticking to the human body, thus enabling convenient replacement.

[0018] The core of this invention is also provided with a flow guiding layer and a water-locking layer. The flow guiding layer is provided with flow guiding holes and vent holes, which can quickly guide the liquid to the water-locking layer below for rapid absorption. The flow guiding layer is also provided with a side leakage prevention locking edge, which is provided with an arc-shaped depression, which can block the seepage liquid and guide the liquid to flow inward.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0020] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0021] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall reverse osmosis absorption core in some embodiments of the present invention;

[0026] Figure 2 This is a schematic diagram showing the internal structure of the reverse osmosis absorption core in some embodiments of this utility model.

[0027] Explanation of key figure labels:

[0028] 1. Anti-reverse seepage net;

[0029] 2. Anti-leakage layer;

[0030] 21. Matching slot;

[0031] 3. Deflector layer;

[0032] 31. Flow guide hole;

[0033] 32. Ventilation holes;

[0034] 33. Anti-leakage edge locking;

[0035] 331. Curved protective belt; 332. Elevated belt;

[0036] 4. Water-locking layer;

[0037] 5. Leak-proof bottom membrane. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0039] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Reference Figure 1 , Figure 1 This is a schematic diagram of the overall reverse osmosis absorption core in some embodiments of the present invention.

[0043] According to some embodiments of the present invention, the present invention provides a three-dimensional mesh reverse osmosis absorption core, including a reverse osmosis layer with a mesh-like reverse osmosis mesh 1, a flow guiding layer 3 disposed below the reverse osmosis layer, a side leakage prevention layer 2 disposed between the reverse osmosis layer and the flow guiding layer 3, and a water-locking layer 4 disposed below the flow guiding layer 3; the reverse osmosis mesh 1 is a foamed sheet with a 3D three-dimensional shape and the cross-section of the wire of the reverse osmosis mesh 1 is circular. The periphery of the reverse osmosis mesh 1 is bonded to the flow guiding layer 3 and the side leakage prevention layer 2 by an embossing process. The side leakage prevention layer 2 is sheet-like and is disposed on both sides of the flow guiding layer 3 and extends inward. A recess is provided between the two side leakage prevention layers 2.

[0044] The anti-reverse osmosis net 1 with a three-dimensional structure has an absorption function for liquid. When the core has limited water absorption or is under pressure and reverse osmosis occurs, the anti-reverse osmosis net 1 on the surface overflows the liquid for absorption. With a small contact area, the absorption speed is fast. At the same time, the anti-reverse osmosis net 1 has a mesh structure and an uneven surface that allows air to enter, keeping the surface dry and preventing the core from sticking to the human body, thus enabling convenient replacement. The anti-leakage layer 2 and the flow guiding layer 3 work together to guide and absorb the liquid, and the water-locking layer 4 located on the bottom side absorbs the liquid as a whole.

[0045] The anti-reverse osmosis mesh 1 has a closed-cell structure with independent air bubbles, a density of 0.01-0.15 g / cm³, and a wire diameter of 0.5-5 mm. The closed-cell structure with independent air bubbles maintains its three-dimensional structure and elasticity under dry conditions. When liquid enters, the internal air bubbles fill the liquid, achieving rapid absorption.

[0046] The water-locking layer 4 is filled with a filler formed by mixing superabsorbent polymer particles with fluff pulp. The filler formed by mixing superabsorbent polymer particles with fluff pulp is a common material for the water-locking layer 4, used to absorb infiltrated liquids. For details, please refer to existing technologies, which will not be elaborated here.

[0047] Reference Figure 2 , Figure 2 This is a schematic diagram showing the internal structure of the reverse osmosis absorption core in some embodiments of this utility model.

[0048] According to some embodiments of this utility model, optionally, the flow guiding layer 3 is provided with flow guiding holes 31 at intervals, the flow guiding holes 31 being concave downwards with arc-shaped concave sides. The concave flow guiding holes 31 are provided to guide liquid to quickly enter the lower water-locking layer 4, which facilitates rapid absorption by the water-locking layer 4. Simultaneously, the flow guiding layer 3 itself also has a certain absorption capacity, capable of absorbing liquids that seep in both the forward and reverse directions.

[0049] Several vent holes 32 are arranged in a ring around the air guide hole 31. The depth of each vent hole 32 is less than the depth of the air guide hole 31. The ring-shaped distribution of the vent holes 32 increases the contact area with air, prevents the core from sticking to the skin, improves breathability, and, together with the air guide hole 31, enhances the appearance of the core.

[0050] Both the flow guide hole 31 and the vent hole 32 are formed by an embossing process. The flow guide hole 31 and the vent hole 32 formed by embossing do not damage the structure of the flow guide layer 3 itself, but can also increase the density of the embossed area, making its structure more robust and preventing the entire flow guide layer 3 from deforming and falling apart after absorbing water and expanding.

[0051] The flow-guiding layer 3 has anti-leakage locking edges 33 on both sides. Each anti-leakage locking edge 33 includes an arc-shaped protective strip 331 and a raised strip 332. The arc-shaped protective strip 331 has intermittently arranged arc-shaped recesses that curve outwards. The raised strip 332 is located outside the arc-shaped protective strip 331 and is higher than it. The anti-leakage locking edges 33 are used to block liquid leakage from the side. The arc-shaped protective strip 331 with intermittently arranged arc-shaped recesses blocks the liquid and guides it back into the interior. Simultaneously, the anti-leakage layer 2 above can absorb the liquid in a timely manner, effectively preventing side leakage. The raised strip 332 provides final protection.

[0052] A matching groove 21 is provided on the bottom side of the anti-leakage layer 2 at a position corresponding to the anti-leakage locking edge 33. The matching groove 21 is adapted to the anti-leakage locking edge 33. After the anti-leakage layer 2 and the anti-leakage locking edge 33 are correspondingly bonded, a solvent is coated on the side. The corresponding matching groove 21 is used to accommodate the anti-leakage locking edge 33, avoiding unevenness at the chip edge during the imprinting process. At the same time, since liquid is prone to seepage in this area, the coating of solvent on the basis of imprinting increases its locking ability and prevents liquid seepage in this area.

[0053] The core also includes a leak-proof bottom membrane 5, which is disposed below the water-locking layer 4. The water-locking layer 4 and the leak-proof bottom membrane 5 are bonded together by a solvent. Since the leak-proof bottom membrane 5 is made of polyethylene, a solvent is applied to ensure the connection between the water-locking layer 4 and the leak-proof bottom membrane 5 to achieve an overall connection, and the edges are further reinforced with embossing to increase its stability.

[0054] The leak-proof bottom film 5 is made of high-density polyethylene. The leak-proof bottom film 5, made of polyethylene, is used to cover the bottom of the water-locking layer 4 to prevent liquid from leaking to the outside. The leak-proof bottom film 5 made of polyethylene is a common feature in diapers. The specific structure and material can be found in existing technology and will not be described in detail here.

[0055] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0056] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0057] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A three-dimensional grid reverse osmosis absorption core, characterized in that, include The anti-reverse osmosis layer is equipped with a grid-like anti-reverse osmosis mesh; A flow-guiding layer is located below the anti-reverse osmosis layer; A side leakage prevention layer is disposed between the anti-reverse seepage layer and the flow guiding layer; A water-locking layer is disposed below the flow-guiding layer; The anti-reverse osmosis mesh is a foamed sheet with a 3D three-dimensional shape and the cross-section of the wire of the anti-reverse osmosis mesh is circular. The anti-reverse osmosis mesh is bonded to the flow guiding layer and the anti-side leakage layer by an embossing process. The anti-side leakage layer is sheet-shaped and is respectively set on both sides of the flow guiding layer and extends inward. A recess is provided between the two anti-side leakage layers.

2. The three-dimensional mesh reverse osmosis absorption core according to claim 1, characterized in that, This anti-reverse osmosis mesh has a closed-cell structure with independent air bubbles, and its density is 0.01-0.15 g / cm³. 3 The diameter of the wire used in this anti-reverse seepage net is 0.5-5mm.

3. The three-dimensional mesh reverse osmosis absorption core according to claim 1, characterized in that, The flow guide layer is provided with flow guide holes at intervals, and the flow guide holes are recessed downwards with arc-shaped sides.

4. The three-dimensional mesh reverse osmosis absorption core according to claim 3, characterized in that, Several vent holes are arranged in a ring around the flow guide hole, and the depth of the vent holes is less than the depth of the flow guide hole.

5. The three-dimensional mesh reverse osmosis absorption core according to claim 4, characterized in that, Both the flow guide hole and the vent hole are formed by an embossing process.

6. The three-dimensional mesh reverse osmosis absorption core according to claim 1, characterized in that, The flow guide layer is provided with anti-leakage locking edges on both sides. The anti-leakage locking edges include an arc-shaped protective strip and a raised strip. The arc-shaped protective strip is provided with arc-shaped recesses at intervals and the arc-shaped recesses are curved outward. The raised strip is provided outside the arc-shaped protective strip and is higher than the arc-shaped protective strip.

7. The three-dimensional mesh reverse osmosis absorption core according to claim 6, characterized in that, A matching groove is provided on the bottom side of the anti-leakage layer at the position corresponding to the anti-leakage locking edge. The matching groove is adapted to the anti-leakage locking edge. After the anti-leakage layer and the anti-leakage locking edge are attached to each other, a solvent is coated on the side.

8. The three-dimensional grid reverse osmosis absorption core according to claim 1, characterized in that, The water-locking layer is filled with a filler formed by mixing superabsorbent polymer particles with fluff pulp.

9. The three-dimensional mesh reverse osmosis absorption core according to claim 1, characterized in that, It also includes a leak-proof bottom membrane, which is disposed below the water-locking layer, and the water-locking layer and the leak-proof bottom membrane are bonded together by a solvent.

10. The three-dimensional grid reverse osmosis absorption core according to claim 9, characterized in that, The leak-proof bottom membrane is made of high-density polyethylene.

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