Latticed absorption product core body with composite effect

Abstract

The invention discloses a latticed absorption product core with a composite effect, which belongs to the technical field of absorption products and comprises an upper coating layer, an absorption layer, a lower coating layer, a restraint layer and a water absorption material, the restraint layer is of a latticed structure, a positioning bin is defined by every four adjacent rubber threads, and the positioning bins are filled with the water absorbing materials. The water absorption material is selected from one of water absorption resin with high water absorption rate and water absorption resin with high permeability; the positioning bin and water-absorbent resin with high water absorption rate jointly form a high-absorption part; the positioning bin and high-permeability water-absorbent resin jointly form a high-permeability part; the restraint layer enables the upper surface of the upper coating layer and the lower surface of the lower coating layer to form breathable channels in warp and weft distribution; according to the invention, the compounding effect of the core body is realized through internal function division, the lumping and swelling phenomena caused by internal stacking of the core body are avoided, and the absorption efficiency of the core body is improved.

Description

Technical Field

[0001] This invention relates to the field of absorbent product technology, and specifically to a mesh-like absorbent product core with composite effects. Background Technology

[0002] Currently, common absorbent products such as diapers and sanitary napkins typically use absorbent polymers (BAPs) as the main component for absorbing liquids. However, the absorption rate of BAPs decreases as the amount of liquid absorbed increases, and the expansion of BAPs after absorbing liquid reduces the breathability of the absorbent product. Since absorption speed and breathability are the most important properties for consumers, BAPs are usually encapsulated in non-woven fabric to form a core within the absorbent product. Some current absorbent products use a zoned absorption structure in the core. By optimizing the liquid absorption process through the zoned structure within the core, the absorption speed and breathability of the absorbent product can be improved, based on the flow path of the liquid during absorption.

[0003] Based on the above, Chinese patent document CN210096102U discloses a composite core material and its absorbent material in which superabsorbent resin is distributed in a gradient layered manner with a speed difference. The composite core material in which superabsorbent resin is distributed in a gradient layered manner with a speed difference is a multilayer composite material, including a first cover layer, a first superabsorbent resin layer, a second superabsorbent resin layer, a high-loft nonwoven fabric layer, a third superabsorbent resin layer, a fourth superabsorbent resin layer and a second cover layer. The absorption speed of the first superabsorbent resin layer is the slowest, and the absorption speed of the second superabsorbent resin layer and the third superabsorbent resin layer gradually increases, and the material is distributed in a gradient layered manner with a speed difference.

[0004] The composite core material disclosed in the aforementioned patent documents features four layers of superabsorbent resin with progressively increasing absorption rates, forming four absorption zones with sequentially increasing absorption rates. During liquid absorption, the upper superabsorbent resin layer, due to its slower absorption rate, maintains a larger internal gap, ensuring a higher liquid infiltration rate. However, the composite core material's relatively singular permeation-promoting properties make it difficult to process large volumes of liquid in a short time. These liquids tend to be concentrated and absorbed within the composite core due to insufficient diffusion efficiency, leading to clumping and affecting its absorption efficiency for subsequent liquids. The overly simplistic functional zoning of this composite core material results in deficiencies in promoting liquid diffusion, thus requiring further improvement. Summary of the Invention

[0005] To address the technical deficiencies in the prior art, this invention proposes a mesh-like absorbent core with composite effects, solving the aforementioned technical problems and meeting practical needs. The specific technical solution is as follows: A mesh-like absorbent core with composite effect includes an upper coating layer, an absorbent layer, and a lower coating layer. The upper coating layer, absorbent layer, and lower coating layer are arranged sequentially along the thickness direction and together form the core body. The absorbent layer is composed of a constraint layer formed by several interlaced adhesive filaments and water-absorbing material. The constraint layer has a mesh-like structure, and each set of four adjacent adhesive filaments forms a positioning chamber. The water-absorbing material fills the interior of the positioning chamber. The absorbent material is selected from one of the following: a high absorbency water-absorbing resin and a high permeability water-absorbing resin. The positioning chamber and the superabsorbent resin filled inside it together form a superabsorbent section, and several continuously distributed superabsorbent sections form an absorption zone within the absorption layer. The positioning chamber and the highly permeable water-absorbing resin filling it together constitute a highly permeable part, and several continuously distributed highly permeable parts form a permeable zone within the absorption layer. The adhesive filaments of the constraint layer pull the upper and lower covering layers inside the core body, so that the upper surface of the upper covering layer and the lower surface of the lower covering layer form a warp and weft distributed air-permeable channel, and the air-permeable channel is recessed inward on the upper surface of the upper covering layer and the lower surface of the lower covering layer.

[0006] As a further technical solution of the present invention, both sides of the core body in the width direction are folded upward to form folded parts, the folded parts cover the upper surface of the core body, and a guide groove extending along the length direction is formed between the two folded parts at the top of the core body.

[0007] As a further technical solution of the present invention, the absorption layer located below the flow channel is provided with a permeation zone, and the two ends of the permeation zone extend to the two ends of the core body in the length direction. The absorbent layer has absorbent regions on both sides of the width direction of the permeation zone and inside the folded part, and the two ends of the absorbent regions extend to the two ends of the length direction of the core body. The absorbent layer has breathable zones on both sides of the core body where it intersects with the folded portion in the width direction. The positioning chambers in the breathable zones are not filled with absorbent material, and the two ends of the breathable zones extend to the two ends of the core body in the length direction.

[0008] As a further technical solution of the present invention, the permeation zone is provided with a plurality of air-permeable blocks, each of which is composed of at least one positioning chamber that is not filled with water-absorbing material.

[0009] As a further technical solution of the present invention, the absorption area in the folded part is provided with a plurality of permeation blocks, and each permeation block is composed of at least one high permeability part.

[0010] As a further technical solution of the present invention, the absorption zones on both sides of the permeation zone are provided with a number of air-permeable blocks, and each air-permeable block is composed of at least one positioning chamber that is not filled with water-absorbing material.

[0011] As a further technical solution of the present invention, a water-retaining cofferdam composed of several high-absorption sections is provided at one or both ends of the length direction of the infiltration zone. The water-retaining cofferdam extends along the width direction and is arc-shaped, with the inner arc side of the arc-shaped water-retaining cofferdam facing the center of the infiltration zone.

[0012] As a further technical solution of the present invention, the position of the upper coating layer relative to the permeation zone is treated with a hydrophilic coating agent, and the position of the lower coating layer relative to the bottom of the core body and the position relative to the top of the folded part are also treated with a hydrophilic coating agent.

[0013] As a further technical solution of the present invention, the positions of the upper and lower coating layers relative to the air-permeable areas are both treated with a hydrophobic agent for surface hydrophobicity.

[0014] As a further technical solution of the present invention, the upper covering layer is subjected to surface antibacterial treatment by coating an antibacterial agent at the position relative to the bottom of the folded part.

[0015] The beneficial effects of this invention are as follows: This invention discloses an absorbent core that achieves a composite effect through internal functional partitioning. Each positioning chamber in the constraint layer of the core serves as a space to accommodate absorbent material and constrains and fixes the absorbent material. When the absorbent material absorbs liquid and expands, the expanded absorbent material is constrained and fixed in place by the positioning chamber, thus avoiding the clumping and bulging phenomenon caused by the absorbent material piling up inside the core. By combining the constraint layer to constrain and fix the absorbent material inside the core body, absorbent materials with different functions can be distributed inside the core body in the same way as initially applied. During the process of absorbing liquid, the absorbent article equipped with the core body of the present invention allows the liquid to quickly penetrate and diffuse through the permeation zone, and then be absorbed and locked inside by the absorption zone. After absorbing the liquid, the core body remains dry due to its high air permeability through the air permeability zone. This allows the core body to simultaneously possess the combined effects of high permeability, high diffusion, high absorption rate, and high air permeability, enabling the liquid to penetrate, diffuse, and be absorbed inside the core body in a more optimized strategy, thereby improving the efficiency of the core body in absorbing liquid and the dryness after absorbing liquid. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a mesh-like absorbent core with composite effects.

[0017] Figure 2A cross-section of the core of a mesh-like absorbent product with composite effects. Figure 1 .

[0018] Figure 3 A cross-section of the core of a mesh-like absorbent product with composite effects. Figure 2 .

[0019] Among them: 1-upper coating layer, 2-absorbent layer, 21-restraint layer, 22-water-absorbing material, 23-absorbent zone, 24-permeable zone, 25-breathable zone, 26-breathable block, 27-permeable block, 28-water-retaining dike, 3-lower coating layer, 4-folded part, 5-drainage channel, a-surface hydrophilic treatment, b-surface hydrophobic treatment, c-surface antibacterial treatment. Detailed Implementation

[0020] The embodiments of the present invention will be described below with reference to the accompanying drawings and examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0021] A mesh-like absorbent core with composite effect includes an upper coating layer 1, an absorbent layer 2, and a lower coating layer 3. The upper coating layer 1, absorbent layer 2, and lower coating layer 3 are arranged sequentially along the thickness direction and together form the core body. The absorbent layer 2 is composed of a constraint layer 21 formed by several interlaced adhesive filaments and a water-absorbing material 22. The constraint layer 21 has a mesh-like structure, and each set of four adjacent adhesive filaments forms a positioning chamber. The water-absorbing material 22 fills the interior of the positioning chamber. The absorbent material 22 is selected from one of the following: a high absorbency superabsorbent resin and a highly permeable superabsorbent resin. The positioning chamber and the superabsorbent resin filled inside it together form a superabsorbent section, and several continuously distributed superabsorbent sections form an absorption zone 23 in the absorption layer 2. The positioning chamber and the highly permeable water-absorbing resin filling it together form a highly permeable part, and several continuously distributed highly permeable parts form a permeable zone 24 in the absorption layer 2. This invention discloses an absorbent core that achieves a composite effect through internal functional partitioning. This core is mainly used in absorbent products such as diapers and sanitary napkins. When the core is placed in a diaper, its two ends along its length are close to the front and back waistbands of the diaper, respectively. (Refer to...) Figure 1 , Figure 2The core mainly consists of an upper covering layer 1, an absorbent layer 2, and a lower covering layer 3. The upper covering layer 1 and the lower covering layer 3 are preferably made of spunlace nonwoven fabric. The absorbent layer 2 consists of a grid-like constraint layer 21 and absorbent material 22 filled in the grid of the constraint layer 21. The grid-like constraint layer 21 is formed by sequentially applying strip-shaped adhesive along the length and width directions on the surface of the lower covering layer 3. After the adhesive is applied to the surface of the lower covering layer 3, the absorbent material 22 is evenly applied to the surface of the lower covering layer 3. The constraint layer 21 can constrain the absorbent material 22. By forming a grid-like barrier structure, the absorbent material 22 is prevented from moving on the surface of the lower covering layer 3 due to mechanical vibration or other reasons during the application process. This allows the absorbent material 22 to maintain its original position on the surface of the lower covering layer 3 after application. Furthermore, the constraint layer 21 formed by the adhesive can bond the lower surface of the upper covering layer 1 and the upper surface of the lower covering layer 3 together. Furthermore, both sides of the core body in the width direction are folded upward to form folded portions 4, which cover the upper surface of the core body. Between the two folded portions 4, a guide groove 5 extending along the length direction is formed at the top of the core body. The structure of the core body located below the folded portions 4 is defined as the lower core. The core body is an integral structure formed by the upper covering layer 1, the absorbent layer 2, and the lower covering layer 3. After the two sides of the core body are folded upward, they form an opening-oriented, C-shaped structure. The folded portions 4 are close to the surface nonwoven fabric of the absorbent product. When the absorbent product absorbs liquid, the liquid will penetrate the surface nonwoven fabric. The fabric penetrates downwards to the surface of the core. At this time, most of the liquid will concentrate and penetrate into the guide groove 5. The guide groove 5 can promote the diffusion of these liquids along the length direction. At the same time, the liquid can also diffuse along the width direction along the gap between the bottom of the folded part 4 and the top of the lower core. This allows the liquid to fully contact the core to improve the absorption efficiency. During the diffusion process, the liquid is absorbed by the absorbent material 22 inside the folded part 4 and by the absorbent material 22 below the guide groove 5 while penetrating downwards. Some liquid also penetrates the surface nonwoven fabric and directly contacts the upper surface of the folded part 4 and is absorbed by the absorbent material 22 inside it. After adopting the above structure, it should be noted that the absorbent core of the present invention includes two granular absorbent resins, each with a specific function. The absorbent resin with a high absorbency ratio is selected from low cross-linked sodium polyacrylate, and the absorbent resin with high permeability is selected from one or a mixture of hydroxyethyl cellulose grafted acrylamide and surface porous modified superabsorbent resin. These absorbent resins with high absorbency ratio and high permeability are applied to specific areas of the surface of the lower coating layer 3 by means of intermittent application, so that the absorbent resins with different functions are distributed in different areas of the surface of the lower coating layer 3. These absorbent resins are constrained and fixed by the constraint layer 21 to form absorption area 23 and permeation area 24 with specific functions, so that the core body absorbs liquid through functional partitioning. It should be further explained that low-crosslinked sodium polyacrylate can absorb 300 to 1000 times more water than pure water and about 80 to 150 times more water than physiological saline. Its molecular structure contains a large number of carboxyl groups that lock in water through hydrogen and ionic bonds, forming a stable hydrogel. Low-crosslinked sodium polyacrylate can give absorption zone 23 a high water absorption rate. The non-ionic structure of hydroxyethyl cellulose grafted with acrylamide does not require an ion dissociation process and can absorb a large amount of water in a short time. Furthermore, the molecular chains of hydroxyethyl cellulose grafted with acrylamide are highly hydrophilic while having low resistance to water molecule diffusion, allowing water to quickly penetrate and diffuse within the permeation zone 24. Surface-porous modified superabsorbent resins are usually prepared as porous particles through reverse suspension polymerization. Their porous structure increases the specific surface area and capillary effect, enabling water to quickly penetrate within the permeation zone 24. In the constraint layer 21 of the present invention, each positioning chamber serves as a space for accommodating absorbent material 22. The positioning chamber is square or rhomboid in shape, with a side length of 5mm to 20mm. The absorbent material 22 is bound by adhesive threads, with a width of 0.2mm to 1mm. When the absorbent material 22 absorbs liquid and expands, the expanded absorbent material 22 is constrained and fixed in place by the positioning chamber, avoiding the clumping and bulging phenomenon caused by the absorbent material 22 piling up inside the core. This allows the core to expand evenly and uniformly, thereby improving the comfort of the human body when in contact with the absorbent product. Furthermore, the adhesive filaments of the constraint layer 21 pull the upper covering layer 1 and the lower covering layer 3 inside the core body, so that the upper surface of the upper covering layer 1 and the lower surface of the lower covering layer 3 form a lattice-distributed air-permeable channel, and the air-permeable channel is recessed inward on the upper surface of the upper covering layer 1 and the lower surface of the lower covering layer 3. The upper covering layer 1 and the lower covering layer 3 are bonded together by adhesive threads. The upper covering layer 1 and the lower covering layer 3 cannot detach from each other due to the tension of the adhesive threads. When the absorbent material 22 in the absorbent layer 2 absorbs liquid and expands, the areas on the upper surface of the upper covering layer 1 and the lower surface of the lower covering layer 3 filled with absorbent material 22 will bulge. The upper surface of the upper covering layer 1 and the lower surface of the lower covering layer 3 will also indent due to the internal tension of the adhesive threads, thus forming a breathable channel. This breathable channel can guide the diffusion of liquid during the absorption process of the core body, allowing the liquid to be evenly distributed inside the core body. After the liquid is completely absorbed by the absorbent layer 2, these breathable channels form a hollow structure on the surface of the core body and between the folded part 4 and the lower core. Air can flow through the breathable channels, improving the breathability of the core body's interior and surface. When the core body is placed inside the absorbent product, these hollow channels can improve the breathability of the absorbent product after absorbing liquid.

[0022] Based on the above structure, the different positions of the absorption zone 23, the permeation zone 24, and the air permeation zone 25 inside the core body of the present invention will have a significant impact on the absorption performance of the core body. By reasonably setting the positions of the absorption zone 23, the permeation zone 24, and the air permeation zone 25, the absorption process of the core body to the liquid can be optimized, thereby improving the performance of the core body. Among them, reference Figure 1 , Figure 2 The absorbent layer 2 located below the guide channel 5 has a permeation zone 24 inside. The two ends of the permeation zone 24 extend to the two ends of the core body in the length direction. The permeation zone 24 inside the absorbent layer 2 below the guide channel 5 can allow the liquid to quickly permeate downward to the bottom of the lower core body during the diffusion process along the guide channel 5, reduce the time the liquid stays inside the guide channel 5, and prevent the liquid inside the guide channel 5 from seeping upward back into the surface non-woven fabric. After the liquid permeates to the lower covering layer 3 at the bottom of the lower core body, the lower covering layer 3 can promote the diffusion of these liquids, so that the liquid contacts the absorbent layer 2 from the bottom and is absorbed. Absorbent layer 2 has absorbent areas 23 on both sides of the width direction of the permeation zone 24 and inside the folded part 4. The two ends of the absorbent areas 23 extend to the two ends of the length direction of the core body. As the main structure to improve the overall water absorption ratio of the core body, the absorbent areas 23 are mainly absorbed by the absorbent areas 23 inside the folded part 4 during the diffusion of liquid in the guide channel 5. When the liquid permeates through the permeation zone 24, it is mainly absorbed by the absorbent areas 23 on both sides of the permeation zone 24. Through the cooperation of multiple absorbent areas 23 with the guide channel 5 and the permeation zone 24, the liquid is absorbed and locked by the high water absorption ratio water-absorbing resin inside the absorbent areas 23 during the diffusion and permeation process. The core of the present invention absorbs a large amount of liquid through the high water absorption ratio water-absorbing resin, ensuring the amount of liquid absorbed by the core. Ventilation zones 25 are provided inside the absorbent layer 2 at the intersection of the core body and the folded portion 4 on both sides in the width direction. The positioning chambers within the ventilation zones 25 are not filled with absorbent material 22. The ventilation zones 25 extend to both ends of the core body in the length direction. Each ventilation zone 25 consists of 1-3 rows of positioning chambers without absorbent material 22 extending along the length of the core body. Anti-leakage partitions are located near the leg openings of the absorbent product at both ends of the core body in the width direction, ensuring that the ventilation zones 25 are close to the edges of the absorbent product. Since the ventilation zones 25 are not filled with absorbent material 22, after the core body absorbs liquid, its interior space relative to the ventilation zones 25... There is no resin gel that obstructs airflow in the area. The breathable zone 25 allows air to circulate with the outside through the edge of the leg opening of the absorbent product. Outside air can easily pass through the breathable zone 25 and enter between the folded part 4 and the lower core. The air finally comes into contact with the surface non-woven fabric through the guide channel 5. The gap between the guide channel 5, the folded part 4 and the lower core, and the hollow channel together form an air channel inside the core. This air channel helps to remove moisture from the core, improves the dryness of the surface of the surface non-woven fabric and the core, and can prevent bacteria and other harmful organisms from growing inside the absorbent product, thereby preventing skin problems caused by the absorbent product being too damp. The water-absorbing material 22 inside the core body is constrained and fixed by the constraint layer 21. The water-absorbing materials 22 with different functions can be distributed inside the core body in the same way as when they were initially applied. During the process of absorbing liquid, the liquid can quickly penetrate and diffuse through the permeation zone 24 and then be absorbed and locked inside by the absorption zone 23. After absorbing liquid, the core body has high air permeability through the air permeability zone 25 and remains dry. This allows the core body to have a composite effect of high permeability, high diffusion, high absorption rate and high air permeability at the same time. This allows the liquid to penetrate, diffuse and be absorbed inside the core body in a better strategy, improving the efficiency of the core body in absorbing liquid and the dryness after absorbing liquid.

[0023] As one of the preferred embodiments of the present invention, refer to Figure 1 , Figure 2 The permeation zone 24 is provided with several breathable blocks 26. Each breathable block 26 consists of at least one positioning chamber that is not filled with absorbent material 22. After the permeation zone 24 is provided with several breathable blocks 26 and absorbs liquid, the position of the permeation zone 24 relative to the breathable blocks 26 does not form a resin gel that hinders air flow, thus forming a breathable structure with high air permeability. These breathable structures are connected to the aforementioned air channels, so that the bottom of the lower core can circulate air through the breathable structure and air channels, further improving the dryness of the core and preventing bacteria and other harmful organisms from growing inside the absorbent product, thereby preventing skin problems caused by the absorbent product being too wet.

[0024] As one of the preferred embodiments of the present invention, refer to Figure 1 , Figure 2 The absorption area 23 in the folded part 4 is provided with a plurality of permeable blocks 27. Each permeable block 27 is composed of at least one high permeability part. After the absorption area 23 in the folded part 4 is provided with a plurality of permeable blocks 27 and absorbs liquid, a permeable structure is formed in the position of the absorption area 23 in the folded part 4 relative to the permeable blocks 27. This permeable structure can promote the liquid to quickly permeate downward to the bottom core. During the process of absorbing liquid in the absorbent product, since some liquid penetrates the surface nonwoven fabric and directly contacts the upper surface of the folded part 4, part of these liquids are absorbed by the absorption area 23 inside the folded part 4, and the other part quickly permeates downward to the surface of the bottom core through the permeable structure. By absorbing liquid simultaneously by the folded part and the bottom core, the absorption efficiency of the core body for liquid is improved, and the liquid is prevented from lingering on the upper surface of the folded part 4 or the surface nonwoven fabric.

[0025] As one of the preferred embodiments of the present invention, refer to Figure 1 , Figure 2 The absorption zones 23 on both sides of the permeation zone 24 are provided with several breathable blocks 26. Each breathable block 26 consists of at least one positioning chamber that is not filled with absorbent material 22. The absorption zones 23 on both sides of the permeation zone 24 are the absorption zones 23 in the lower core. After the absorption zone 23 is provided with several breathable blocks 26 and absorbs liquid, the position of the absorption zone 23 relative to the breathable blocks 26 does not form a resin gel that hinders air flow, thus forming a breathable structure with high breathability. These breathable structures are connected to the aforementioned air channels, so that the bottom of the lower core can circulate air through the breathable structures and air channels, further improving the dryness inside the core and preventing bacteria and other harmful organisms from growing inside the absorbent product, thereby preventing skin problems caused by the absorbent product being too moist.

[0026] As one of the preferred embodiments of the present invention, refer to Figure 1 , Figure 2One or both ends of the permeation zone 24 along its length are provided with a water-retaining dam 28 composed of several highly absorbent parts. The water-retaining dam 28 extends along its width and is arc-shaped, with the inner arc side of the arc-shaped water-retaining dam 28 facing the center of the permeation zone 24. Compared to the absorbent material 22 in the highly permeable parts, the absorbent material 22 in the highly absorbent parts has a higher water absorption ratio and can have a higher expansion ratio after absorbing liquid. During the process of the core body absorbing liquid, the absorbent material 22 in the highly absorbent parts of the water-retaining dam 28 expands to a larger volume after absorbing liquid, so that the permeation zone 24 forms an arc-shaped protrusion structure at the position relative to the water-retaining dam 28. That is, the protrusion structure protrudes on the surface of the upper covering layer 1 at the bottom of the guide channel 5. When the liquid diffuses longitudinally in the guide channel 5 and approaches the edge of the core body, the protrusion structure can block these liquids and prevent the liquid from continuing to diffuse along the length to the front or rear waist of the absorbent product, thereby improving the leak-proof performance of the absorbent product.

[0027] In one preferred embodiment of the present invention, the upper coating layer 1, relative to the permeation zone 24, undergoes surface hydrophilic treatment by coating with a hydrophilic finishing agent. Similarly, the lower coating layer 3, relative to the bottom of the core body and relative to the top of the folded portion 4, also undergoes surface hydrophilic treatment by coating with a hydrophilic finishing agent. The present invention can use hydrophilic finishing agents such as polyether-modified silicone to coat the aforementioned positions of the upper coating layer 1 and the lower coating layer 3, thereby improving the hydrophilicity of these positions. Figure 3 Point a in the diagram indicates the location where the upper coating layer 1 and the lower coating layer 3 are coated with a hydrophilic finishing agent. When the hydrophilicity of the upper coating layer 1 relative to the permeation zone 24 is improved, the liquid in the guide channel 5 can better penetrate the upper coating layer 1 and permeate downwards into the lower core, improving the core's absorption efficiency. When the hydrophilicity of the lower coating layer 3 relative to the bottom of the core is improved, the liquid permeating to the bottom of the core can better diffuse along the lower coating layer 3, allowing the liquid to better contact the absorbent material 22 inside the core. When the hydrophilicity of the lower coating layer 3 relative to the top of the folded portion 4 is improved, some of the liquid penetrating the surface nonwoven fabric can better penetrate the lower coating layer 3 and permeate downwards into the folded portion 4, improving the core's absorption efficiency.

[0028] As one of the preferred embodiments of the present invention, the positions of the upper covering layer 1 and the lower covering layer 3 relative to the air-permeable area 25 are both treated with a hydrophobic agent for surface hydrophobicity; such as Figure 3Point b in the diagram indicates the location where the upper coating layer 1 and the lower coating layer 3 are coated with a hydrophobic agent. In this invention, hydrophobic agents such as polydimethylsiloxane can be applied to the aforementioned locations of the upper coating layer 1 and the lower coating layer 3 to make these locations hydrophobic. The locations where the hydrophobic agent is applied to the upper coating layer 1 and the lower coating layer 3 are matched with the breathable area 25 to prevent liquid from remaining in these locations and to keep the capillary structure inside these locations unobstructed. External air can circulate more smoothly through the breathable area 25 and the air channel, ensuring the breathability of the core body.

[0029] In one preferred embodiment of the present invention, the upper covering layer 1 is coated with an antibacterial agent at the position relative to the bottom of the folded portion 4 for surface antibacterial treatment. The position of the core body coated with the antibacterial agent is the position in the upper covering layer 1 located between the folded portion 4 and the lower core layer. Figure 3 Point c in the diagram indicates the location where the antibacterial agent is applied to the upper coating layer 1. This location is in the middle of the core body's thickness direction. The relatively humid environment inside the core body makes it easy for bacteria and other harmful organisms to grow. This invention can use silver ion antibacterial agents to coat these locations and give them antibacterial properties, thereby preventing the growth of bacteria and other harmful organisms inside the core body and thus avoiding skin problems caused by bacteria and other harmful organisms, ensuring the user's skin health.

[0030] In summary, the present invention discloses an absorbent core that achieves a composite effect through internal functional partitioning. Each positioning chamber in the constraint layer 21 of the core serves as a space to accommodate the absorbent material 22 and constrains and fixes the absorbent material 22. When the absorbent material 22 absorbs liquid and expands, the expanded absorbent material 22 is constrained and fixed in place by the positioning chamber, thus avoiding the clumping and bulging phenomenon caused by the absorbent material 22 piling up inside the core. The water-absorbing material 22 inside the core body is constrained and fixed by the constraint layer 21. The water-absorbing materials 22 with different functions can be distributed inside the core body in the same way as when they were initially applied. When the absorbent product with the core body of the present invention absorbs liquid, the liquid can quickly penetrate and diffuse through the permeation zone 24, and then be absorbed and locked inside by the absorption zone 23. After absorbing the liquid, the core body has high air permeability through the air permeability zone 25 and remains dry. This allows the core body to have a composite effect of high permeability, high diffusion, high absorption rate and high air permeability at the same time. This allows the liquid to penetrate, diffuse and be absorbed inside the core body in a better strategy, improving the efficiency of the core body in absorbing liquid and the dryness after absorbing liquid.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A mesh-like absorbent core with composite effects, comprising an upper coating layer (1), an absorbent layer (2), and a lower coating layer (3), characterized in that, The upper coating layer (1), the absorbent layer (2), and the lower coating layer (3) are arranged sequentially along the thickness direction and together form the core body. The absorbent layer (2) is composed of a constraint layer (21) formed by several interlaced rubber filaments and a water-absorbing material (22). The constraint layer (21) has a grid structure and each of the four adjacent rubber filaments forms a positioning chamber. The water-absorbing material (22) is filled inside the positioning chamber. The absorbent material (22) is selected from one of the following: a high absorbency water-absorbing resin and a high permeability water-absorbing resin; The positioning chamber and the superabsorbent resin filled inside it together form a superabsorbent section, and several continuously distributed superabsorbent sections form an absorption zone (23) in the absorption layer (2). The positioning chamber and the highly permeable water-absorbing resin filling it together form a highly permeable part, and several continuously distributed highly permeable parts form a permeable zone (24) in the absorption layer (2). The adhesive filaments of the constraint layer (21) pull the upper covering layer (1) and the lower covering layer (3) inside the core body, so that the upper surface of the upper covering layer (1) and the lower surface of the lower covering layer (3) form a warp and weft distributed air-permeable channel, and the air-permeable channel is recessed inward on the upper surface of the upper covering layer (1) and the lower surface of the lower covering layer (3).

2. The mesh-like absorbent core with composite effect according to claim 1, characterized in that, Both sides of the core body in the width direction are folded upward to form folded parts (4), the folded parts (4) cover the upper surface of the core body, and a guide groove (5) extending along the length direction is formed between the two folded parts (4) at the top of the core body.

3. The mesh-like absorbent core with composite effect according to claim 2, characterized in that, The absorption layer (2) located below the flow channel (5) has a permeation zone (24) inside, and the two ends of the permeation zone (24) extend to the two ends of the core body in the length direction; The absorption layer (2) has absorption areas (23) on both sides of the width direction of the permeation area (24) and inside the fold (4), and the two ends of the absorption area (23) extend to the two ends of the length direction of the core body. The absorbent layer (2) has a breathable zone (25) at the intersection of the core body and the folded part (4) on both sides of the width direction. The positioning chamber in the breathable zone (25) is not filled with water-absorbing material (22). The two ends of the breathable zone (25) extend to the two ends of the length direction of the core body.

4. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The permeation zone (24) is provided with a number of air-permeable blocks (26), each of which consists of at least one positioning chamber that is not filled with water-absorbing material (22).

5. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The absorption zone (23) in the folded part (4) is provided with a plurality of permeable blocks (27), each of the permeable blocks (27) being composed of at least one high permeability section.

6. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The absorption zone (23) on both sides of the permeation zone (24) is provided with a number of air-permeable blocks (26), each of the air-permeable blocks (26) is composed of at least one positioning chamber that is not filled with water-absorbing material (22).

7. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, One or both ends of the infiltration zone (24) along its length are provided with a water-retaining cofferdam (28) composed of several high-absorption sections. The water-retaining cofferdam (28) extends along its width and is arc-shaped. The inner arc side of the arc-shaped water-retaining cofferdam (28) faces the center of the infiltration zone (24).

8. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The position of the upper coating layer (1) relative to the permeation zone (24) is treated with a hydrophilic coating agent to make the surface hydrophilic. The position of the lower coating layer (3) relative to the bottom of the core body and the position relative to the top of the folded part (4) are also treated with a hydrophilic coating agent to make the surface hydrophilic.

9. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The positions of the upper covering layer (1) and the lower covering layer (3) relative to the air-permeable area (25) are both treated with a hydrophobic agent to achieve surface hydrophobicity.

10. The mesh-like absorbent core with composite effect according to claim 3, characterized in that, The upper covering layer (1) is treated with antibacterial agent at the bottom of the fold (4).

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