Partitioned absorbent core

Abstract

This utility model relates to the field of disposable hygiene products, and more particularly to a partitioned absorbent core, comprising a body, which includes an upper surface layer, a lower bottom layer, and a SAP absorbent layer, wherein the SAP absorbent layer is composed of multiple SAP aggregation points; the body is divided along its length into a first absorbent zone, a second absorbent zone, and a third absorbent zone, with the SAP aggregation points in the first and third absorbent zones being uniformly distributed; the SAP aggregation points in the second absorbent zone form multiple spaced-apart first absorbent columns along the length of the body. This invention solves the technical problem that existing absorbent cores cannot optimize absorption performance.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and in particular to a partitioned absorbent core. Background Technology

[0002] In the field of absorbent hygiene products, such as diapers and sanitary napkins, the absorbent core is a key component, and its absorbency and comfort are crucial to the user experience. Traditional absorbent cores often use uniformly distributed absorbent materials, such as the thin, soft, and instantly absorbent core disclosed in Chinese Patent Publication No. CN222676705U. However, in actual use, due to the uneven distribution of human excrement and pressure changes during activity, this uniformly distributed absorbent core may not be able to provide optimal absorption in different areas.

[0003] Especially in infant diapers or adult incontinence products, the front and back waist areas are more prone to compression and friction due to frequent movement, while the crotch area is in direct contact with excrement and requires higher absorbency. However, traditional absorbent cores have not fully considered these regional differences in their structural design, resulting in over-absorbency in some areas and under-absorbency in others, affecting the overall performance of the product and the user experience.

[0004] Furthermore, as consumers increasingly demand higher levels of comfort and environmental friendliness from their products, improving breathability while ensuring absorbency has become a pressing issue in the field of absorbent hygiene products. Utility Model Content

[0005] Therefore, in response to the above problems, this utility model proposes a partitioned absorption core, which solves the technical problem that existing absorption cores cannot optimize the absorption effect through the structural arrangement of different regions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a partitioned absorbent core, comprising a body, the body comprising an upper surface layer, a lower bottom layer and a SAP absorbent layer sandwiched between the upper surface layer and the lower bottom layer, the SAP absorbent layer being composed of a plurality of point-like and spaced SAP aggregation points;

[0007] The body is divided into a first absorption region, a second absorption region and a third absorption region along its length. The SAP aggregation points in the first absorption region and the third absorption region are evenly distributed. The ratio of the total area of ​​the SAP aggregation points in the first absorption region to the area of ​​the first absorption region is the first area percentage, which is 10% to 30%.

[0008] The SAP clusters in the second absorption region form a first absorption column that is spaced apart and runs along the length of the body. The ratio of the total area of ​​the SAP clusters in the second absorption region to the area of ​​the second absorption region is the second area percentage, which is 20% to 50%.

[0009] Furthermore, the proportion of the second area is greater than that of the first area.

[0010] Furthermore, in the first and third absorption zones, two adjacent SAP aggregation points are staggered along the length of the body.

[0011] Furthermore, after the SAP aggregation points absorb water, the average height of each SAP aggregation point after water absorption is 1.2 to 1.5 times the average height of each SAP aggregation point before water absorption.

[0012] Furthermore, the shape of the SAP aggregation point is one or more combinations of circles, triangles, squares, and rhombuses.

[0013] Furthermore, the area of ​​the second absorption region is 1.5 to 3 times the area of ​​the first absorption region.

[0014] Furthermore, in the second absorption zone, adjacent first absorption columns form a guide space, the width of which is greater than the width of the SAP aggregation point.

[0015] Furthermore, the width of the flow guiding space located in the middle of the body is greater than the width of the flow guiding spaces located on both sides of the body.

[0016] Furthermore, a fluffy cotton layer is provided between the SAP absorbent layer and the underlying nonwoven fabric.

[0017] Furthermore, a second absorbent column formed by multiple strands of fluff pulp arranged along the length of the body is laid between the fluffy cotton layer and the bottom nonwoven fabric.

[0018] Furthermore, the second absorption columns are evenly distributed, and each SAP aggregation point is located directly above each second absorption column.

[0019] A partitioned absorbent core based on the same inventive concept includes a body, which includes an upper surface layer, a lower bottom layer, and a SAP absorbent layer sandwiched between the upper surface layer and the lower bottom layer. The SAP absorbent layer is composed of a plurality of point-like and spaced-apart SAP aggregation points.

[0020] The body is divided into a first absorption region and a second absorption region along its length. The SAP aggregation points in the first absorption region are evenly distributed. The ratio of the total area of ​​the SAP aggregation points in the first absorption region to the area of ​​the first absorption region is the first area percentage, which is 10% to 30%.

[0021] The SAP clusters in the second absorption region form a first absorption column that is spaced apart and runs along the length of the body. The ratio of the total area of ​​the SAP clusters in the second absorption region to the area of ​​the second absorption region is the second area percentage, which is 20% to 50%.

[0022] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0023] 1. By dividing the absorbent core into different absorption zones (first absorption zone, second absorption zone, and third absorption zone), and designing different SAP (superabsorbent polymer) aggregation point distributions and area proportions for each zone, rapid diffusion and rapid absorption can be achieved. The SAP aggregation points in the first and third absorption zones are evenly distributed, providing basic absorption capacity; the SAP aggregation points in the second absorption zone form the first absorption column, and with a higher area proportion, they can provide stronger absorption capacity for areas with concentrated excrement, thereby improving the overall absorption efficiency and effectiveness of the absorbent core.

[0024] The increased height of the SAP (Spatial Absorbent Polymer) aggregation points after absorbing water allows for the formation of a thicker absorbent layer, increasing the contact area with the liquid and further improving absorption speed and capacity. Simultaneously, this expansion effect helps maintain the structural stability of the absorbent core, preventing liquid backflow. The bulges formed by the SAP after absorbing water achieve better breathability, enhancing user comfort. The optimal choice is when the average height of each SAP aggregation point after absorbing water is 1.2 to 1.5 times the average height of the SAP aggregation points before absorbing water.

[0025] 2. The staggered arrangement between adjacent SAP aggregation points in the first and third absorption zones can increase the liquid diffusion path on the surface of the absorption core, making the liquid more evenly distributed throughout the absorption area, achieving rapid diffusion and rapid absorption, thereby improving absorption speed and efficiency, and reducing the risk of local overload and leakage.

[0026] 3. The area of ​​the second absorption zone is designed to be 1.5 to 3 times that of the first absorption zone, ensuring sufficient absorption capacity to handle concentrated excrement. Correspondingly, the area of ​​the third absorption zone can be approximately the same as the first. This design helps optimize the overall absorption performance of the absorption core, improves product reliability and user satisfaction, and achieves rapid diffusion and absorption.

[0027] 4. The guiding space formed between adjacent first absorption columns in the second absorption zone guides the liquid to diffuse more quickly throughout the entire absorption area, improving absorption speed and efficiency. The width of the guiding space is greater than the width of the SAP aggregation point, ensuring that the liquid is not excessively obstructed during diffusion, achieving rapid diffusion and absorption. The guiding space located in the middle of the body is wider than the guiding spaces located on both sides of the body, which can further optimize the liquid diffusion path. The wider guiding space in the middle helps the liquid reach the central area of ​​the absorption core more quickly, improving the overall absorption efficiency; while the narrower guiding spaces on both sides can limit the diffusion range of the liquid to a certain extent, preventing liquid leakage and achieving rapid diffusion and absorption.

[0028] 5. A fluffy cotton layer is placed between the SAP absorbent layer and the underlying non-woven fabric to increase the softness, comfort, and breathability of the absorbent core. This fluffy cotton layer also has some liquid retention capacity, supplementing the SAP absorbent layer and improving overall absorbency. The middle fluffy cotton can be made of 3D crimped polyester fiber, a combination of bicomponent ES fiber and 3D crimped polyester fiber, or a combination of bicomponent ES fiber, 3D crimped polyester fiber, and nylon fiber, further enhancing the performance and comfort of the absorbent core.

[0029] 6. A second absorbent column, formed by multiple strips of fluff pulp arranged along the length of the core, is laid between the fluffy cotton layer and the underlying non-woven fabric. This further increases the absorbency of the absorbent core and the speed of liquid diffusion. The fluff pulp effectively stores and absorbs blood, making it particularly suitable for applications such as feminine hygiene products. The second absorbent column works in conjunction with the SAP absorbent layer to form a multi-layered absorption system, improving the overall performance of the product and achieving rapid diffusion and absorption.

[0030] 7. The even distribution of each second absorption column, with each SAP aggregation point located directly above its respective second absorption column, ensures that the liquid is uniformly absorbed by the absorption layer during diffusion. This design helps improve the absorption efficiency and uniformity of the absorbent core, reduces the risk of local overload and leakage, and enables rapid diffusion and absorption, providing users with a more comfortable and reliable user experience. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 yes Figure 1 A schematic diagram of the structure on the back.

[0033] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure at point AA.

[0034] Figure 4 yes Figure 3 A schematic diagram of another implementation method.

[0035] Figure 5 This is a schematic diagram of the product structure of this utility model.

[0036] Figure 6 This is a schematic diagram of another embodiment of the present invention.

[0037] Figure label:

[0038] 1. Body; 11. First absorption zone; 12. Second absorption zone; 13. Third absorption zone; 14. Flow guide space; 2. Upper surface layer; 3. Lower bottom layer; 4. SAP aggregation point; 41. First absorption column; 5. Fluffy cotton layer; 6. Second absorption column. Detailed Implementation

[0039] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0040] refer to Figures 1 to 5 This embodiment provides a partitioned absorption core, including a body 1. The body 1 includes an upper surface layer 2, a lower bottom layer 3, and a SAP absorption layer sandwiched between the upper surface layer 2 and the lower bottom layer 3. The SAP absorption layer is composed of a plurality of point-like and spaced-apart SAP aggregation points 4.

[0041] The body 1 is divided into a first absorption region 11, a second absorption region 12 and a third absorption region 13 along its length. The SAP aggregation points 4 in the first absorption region 11 and the third absorption region 13 are evenly distributed. The ratio of the total area of ​​the SAP aggregation points 4 in the first absorption region 11 to the area of ​​the first absorption region 11 is the first area percentage, which is 10% to 30%.

[0042] The SAP aggregation points 4 in the second absorption region 12 form a plurality of spaced first absorption columns 41 along the length of the body 1. The ratio of the total area of ​​the SAP aggregation points 4 in the second absorption region 12 to the area of ​​the second absorption region 12 is the second area percentage, which is 20% to 50%.

[0043] The second area percentage is greater than the first area percentage. Therefore, this is the better choice.

[0044] The upper surface layer 2 and the lower bottom layer 3 can be adopted.

[0045] Materials such as hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric, as well as toilet paper, can be used to provide good softness and breathability. SAP aggregation points 4 are formed by the accumulation of SAP particles and can be made of polyacrylate-based SAP, which has good absorbency and high stability. SAP aggregation points 4 can be formed between the nonwoven fabric particles through methods such as targeted spraying or roll coating, which are conventional techniques. The area ratio of SAP aggregation points 4 in the first absorption zone 11 and the third absorption zone 13 is preferably selected to be 20% to 25%, such as 22.5%, to ensure basic absorbency without excessively increasing material costs. The area ratio of SAP aggregation points 4 in the second absorption zone 12 is preferably selected to be 25% to 35%, such as 30%, to provide stronger absorbency for areas with concentrated excrement.

[0046] like Figure 1 As shown, in the first absorption region 11 and the third absorption region 13, the pink part represents SAP aggregation points 4; in the second absorption region 12, the blue part represents SAP absorption points. The area selected by the double-dotted line is the first absorption column 41 formed by SAP aggregation points 4, which can be formed by two SAP aggregation points 4 side by side, or by one or more aggregation points side by side.

[0047] In the first absorption zone 11 and the third absorption zone 13, two adjacent SAP aggregation points 4 are staggered along the length of the body 1. For example... Figure 1 SAP aggregation points 4a and 4b are set in a staggered manner.

[0048] After the SAP aggregation points 4 absorb water, the average height of each SAP aggregation point 4 after water absorption is 1.2 to 1.5 times the average height of each SAP aggregation point 4 before water absorption, preferably 1.3 times, ensuring that the absorbent core can still maintain good structural stability and air permeability after water absorption. The shape of the SAP aggregation points 4 is one or more combinations of circles, triangles, squares, and rhombuses, and of course, it can also be any other arbitrary shape.

[0049] The area of ​​the second absorption zone 12 is 1.5 to 3 times the area of ​​the first absorption zone 11. The area of ​​the second absorption zone 12 can be adjusted according to actual needs, preferably 2 to 2.5 times the area of ​​the first absorption zone 11, to ensure that the second absorption zone 12 has sufficient absorption capacity to cope with the situation of concentrated excrement, while not excessively increasing the overall size and weight of the absorption core.

[0050] Adjacent first absorber columns 41 form a flow guiding space 14, the width of which is greater than the width of the SAP gathering point 4. The width of the flow guiding space 14 can be controlled by adjusting the spacing between adjacent first absorber columns 41, and its width can be set according to actual needs. Preferably, the width of the flow guiding space 14 can be selected to be 1.5 to 2 times the width of the SAP gathering point 4 to ensure that the liquid is not excessively obstructed during diffusion and can quickly reach the central area of ​​the absorber core. The width of the flow guiding space 14 located in the middle of the body 1 is greater than the width of the flow guiding spaces 14 located on both sides of the body 1.

[0051] A fluffy cotton layer 5 is disposed between the SAP absorbent layer and the underlying nonwoven fabric. The fluffy cotton layer 5 can be made of 3D crimped polyester fiber, a combination of bicomponent ES fiber and 3D crimped polyester fiber, or a combination of bicomponent ES fiber, 3D crimped polyester fiber, and cotyl ether fiber, to increase the softness and comfort of the absorbent core and to provide a certain liquid absorption or storage capacity. The thickness of the fluffy cotton layer 5 can be adjusted according to actual needs, preferably from 0.5mm to 2mm.

[0052] Between the fluffy cotton layer 5 and the bottom non-woven fabric, there is a second absorbent column 6 formed by multiple strips of fluff pulp arranged along the length of the body 1. Figure 1 The dashed line indicates the second absorbent column 6. The fluff pulp can be made from natural fibers such as wood pulp or bamboo pulp, which have excellent liquid absorption and storage capacity. The width and spacing of the second absorbent column 6 can be adjusted according to actual needs. Preferably, the width of the second absorbent column 6 can be selected from 2mm to 10mm, such as 8mm, and the spacing from 3mm to 10mm, such as 5mm, to form a multi-layered absorption system and improve the overall performance of the product.

[0053] Each of the second absorber columns 6 is evenly distributed, with each SAP aggregation point 4 located directly above each of the second absorber columns 6. The even distribution of the second absorber columns 6 can be achieved by adjusting the laying method and spacing of the fluff pulp, ensuring that each SAP aggregation point 4 is accurately positioned directly above each of the second absorber columns 6, thus achieving uniform absorption of the liquid during the diffusion process. This design helps improve the absorption efficiency and uniformity of the absorbent core, reducing the risk of localized overload and leakage.

[0054] refer to Figure 2 In this design, the upper surface layer 2, SAP absorbent layer, fluffy cotton layer 5, second absorbent column, and lower bottom layer 3 can be stacked sequentially to form a layered structure. (See also...) Figure 3 The upper layer 2 can also extend from both sides to cover the lower surface of the lower layer 3. Alternatively, the lower layer 3 can extend from both sides to cover the upper surface of the upper layer 2.

[0055] Among them, such as Figure 5 As shown, the lower half illustrates the SAP aggregation point 4, while the upper half is for illustrative purposes only. The SAP aggregation point in the above scheme is not uniquely limited. It is sufficient that the first absorption region 11 and the third absorption region 13 are roughly evenly distributed. There are not many requirements for the shape and position of the SAP aggregation point 4, only its first area ratio is required. In the second absorption region 12, it is sufficient that it is roughly in a row and has a flow guiding space 14, and the second area ratio meets the requirements.

[0056] See again Figure 6 This is another embodiment of the present invention, differing from Embodiment 1 in that the third absorption region is omitted, and the first absorption region 11 is increased in size. The area of ​​the second absorption region 12 is 1.1-1.5 times that of the first absorption region 11, preferably 1.1-1.2 times that of the first absorption region 11. Compared to Embodiment 1, this arrangement simplifies the structure of the absorption core by eliminating the third absorption region, which helps reduce complexity and cost in the production process. Although the third absorption region is removed, the remaining first and second absorption regions, through reasonable SAP aggregation point distribution and flow guidance space design, can still achieve rapid diffusion and absorption of the liquid. The effect is comparable to that of Embodiment 1.

[0057] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A partitioned absorption core, characterized in that: The body includes an upper surface layer, a lower bottom layer, and an SAP absorption layer sandwiched between the upper surface layer and the lower bottom layer. The SAP absorption layer is composed of multiple point-like and spaced-apart SAP aggregation points. The body is divided into a first absorption region, a second absorption region and a third absorption region along its length. The SAP aggregation points in the first absorption region and the third absorption region are evenly distributed. The ratio of the total area of ​​the SAP aggregation points in the first absorption region to the area of ​​the first absorption region is the first area percentage, which is 10% to 30%. The SAP clusters in the second absorption region form a first absorption column that is spaced apart and runs along the length of the body. The ratio of the total area of ​​the SAP clusters in the second absorption region to the area of ​​the second absorption region is the second area percentage, which is 20% to 50%.

2. The partitioned absorption core according to claim 1, characterized in that: In the first and third absorption zones, two adjacent SAP aggregation points are staggered along the length of the body.

3. The partitioned absorption core according to claim 1, characterized in that: After the SAP aggregation points absorb water, the average height of each SAP aggregation point after water absorption is 1.2 to 1.5 times the average height of each SAP aggregation point before water absorption.

4. The partitioned absorption core according to claim 1, characterized in that: The shape of the SAP aggregation point is one or more combinations of circles, triangles, squares, and rhombuses.

5. A partitioned absorption core according to claim 1, characterized in that: The area of ​​the second absorption region is 1.5 to 3 times the area of ​​the first absorption region.

6. A partitioned absorption core according to claim 1, characterized in that: In the second absorption zone, adjacent first absorption columns form a guide space, the width of which is greater than the width of the SAP aggregation point.

7. A partitioned absorption core according to claim 6, characterized in that: in, The width of the flow guiding space located in the middle of the body is greater than the width of the flow guiding spaces located on both sides of the body.

8. A partitioned absorption core according to any one of claims 1 to 7, characterized in that: A fluffy cotton layer is provided between the SAP absorbent layer and the bottom nonwoven fabric.

9. A partitioned absorption core according to claim 8, characterized in that: Between the fluffy cotton layer and the bottom nonwoven fabric, there is a second absorbent column formed by multiple strands of fluff pulp arranged along the length of the body.

10. A partitioned absorption core, characterized in that: The body includes an upper surface layer, a lower bottom layer, and an SAP absorption layer sandwiched between the upper surface layer and the lower bottom layer. The SAP absorption layer is composed of multiple point-like and spaced-apart SAP aggregation points. The body is divided into a first absorption region and a second absorption region along its length. The SAP aggregation points in the first absorption region are evenly distributed. The ratio of the total area of ​​the SAP aggregation points in the first absorption region to the area of ​​the first absorption region is the first area percentage, which is 10% to 30%. The SAP clusters in the second absorption region form a first absorption column that is spaced apart and runs along the length of the body. The ratio of the total area of ​​the SAP clusters in the second absorption region to the area of ​​the second absorption region is the second area percentage, which is 20% to 50%.

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