Slotted absorption article with diffusion nodes in multi-stage arrangement
By introducing a slotted design with multi-level arrangement of diffusion nodes into the absorbent material, the problems of poor tactile feel of the surface material and liquid diffusion are solved, realizing four-way diffusion and multi-level buffering of the liquid, thereby improving the absorption efficiency of the core and user comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-03-31
AI Technical Summary
Existing absorbent products have poor surface materials with insufficient permeability, leading to liquid diffusion and dampness in the user's groin area. The grooved core design cannot effectively control the liquid flow rate, making it prone to front and back leakage.
The design employs a multi-level arrangement of diffusion nodes in a slotted structure. The front and rear sections of the guide channel are combined with the liquid storage and diffusion channel to form a multi-level buffer structure, increasing the liquid buffer area. The liquid diffuses into a four-way flow at the end of the guide channel, improving the core absorption efficiency and preventing leakage at both ends.
It effectively controls the liquid flow rate, reduces the contact area between the user's skin and the liquid, improves the core's absorption efficiency, reduces the risk of front and rear leakage, and enhances user comfort.
Smart Images
Figure CN224056190U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of baby diaper technology, specifically to a slotted absorbent material with multi-level arrangement of diffusion nodes. Background Technology
[0002] The surface layer of existing absorbent products is generally made of non-woven fabrics or synthetic fibers, and the vast majority are not pure cotton. If the manufacturing process is improper, the surface feel of such materials is relatively poor. Furthermore, to improve the structural strength of absorbent products and prevent tearing, high-density materials are generally used to enhance structural strength and surface smoothness. However, without proper surface treatment of the high-density surface layer, its permeability is relatively insufficient. Specifically, if the amount of fluid excreted by the user suddenly increases, the surface layer's drainage speed cannot keep up with the fluid output, and the core below cannot absorb it in time. The fluid will then spread along the surface of the surface layer and the core. Regardless of whether side leakage occurs, this unnecessary dampness in the user's groin area will cause inconvenience.
[0003] Based on the above, some new products choose to use grooves on the core surface to accelerate the penetration of liquid. Combined with a surface layer with good conductivity, this allows the core to fully contact the liquid and absorb it without prolonged contact with the user's skin. However, existing core grooving methods often involve setting one or more straight grooves in the middle. If the liquid continues to penetrate along both ends of the groove, and the liquid flows back and forth along the groove direction, without a suitable structure to slow down the liquid flow, leakage will still occur at both ends, causing unnecessary trouble for users. Utility Model Content
[0004] To address the technical deficiencies in the background art, this utility model proposes a slotted absorbent material with multi-level arrangement of diffusion nodes, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:
[0005] The slotted absorbent material with multi-level diffusion nodes includes a top layer, a core, and a bottom layer that are sequentially composited into one piece. The core is composed of at least a covering fabric and an absorbent body wrapped within the covering fabric. The core has guide grooves along its length. Each guide groove consists of a front section and a rear section. Both the front and rear sections of the guide groove are based on their original width and depth, and are further expanded near their ends to form liquid storage and diffusion grooves.
[0006] Preferably, an additional liquid storage and diffusion tank is provided between the front section and the rear section of the guide channel, and the additional liquid storage and diffusion tank makes the length of the front section of the guide channel shorter than that of the rear section of the guide channel.
[0007] Preferably, the covering fabric includes a lower covering fabric that wraps around the bottom and both sides of the absorbent in the width direction from bottom to top, and an upper covering fabric that covers the top of the absorbent. The upper covering fabric is attached to the inner wall of the guide channel and the liquid storage diffusion channel.
[0008] Preferably, the surface layer covers the top of the upper covering fabric and is only combined with the upper covering fabric at the flow channel and the liquid storage diffusion channel.
[0009] Preferably, a second absorbent is further incorporated between the surface layer and the upper covering fabric.
[0010] Preferably, the liquid storage diffusion tank is any one or a combination of several of the following shapes: quadrilateral, circular, elliptical, triangular, and V-shaped; the cross-section of the liquid storage diffusion tank is rectangular or trapezoidal, and the width of the liquid storage diffusion tank is 6mm-30mm.
[0011] Preferably, at least one end of the guide channel extends to the end of the core along its length, the cross-section of the guide channel is rectangular or trapezoidal, and the width of the guide channel is 2mm-20mm.
[0012] This invention, based on the existing straight flow channel, further expands each flow channel with two or more nodes of liquid storage and diffusion channels. This adds a liquid buffer area to the flow channel, improving upon the original technical effect. By utilizing the liquid storage and diffusion channels at each node, the unidirectional flow of liquid becomes a four-way diffusion trend, significantly reducing the liquid volume per unit area. This provides sufficient time for the core to absorb liquid, improving the core's absorption and utilization rate. The multi-level arrangement also effectively prevents leakage at both ends of the core, ensuring sufficient absorption of liquid in this area. The time and area of contact between the user's skin and excrement are reduced, resulting in a drier and more comfortable user experience. Attached Figure Description
[0013] Figure 1 This is a cross-sectional structural diagram of the present invention.
[0014] Figure 2 This is a top view of the structure of this utility model.
[0015] Figure 3 This is a cross-sectional structural diagram of Embodiment A of the present invention.
[0016] Figure 4 This is a cross-sectional structural diagram of Embodiment B of the present invention.
[0017] Figure 5 This is a cross-sectional view of embodiment C of the present invention.
[0018] Figure 6This is a cross-sectional structural diagram of Embodiment D of the present invention.
[0019] Figure 7 This is a schematic diagram showing the shape and type of the liquid storage diffusion tank.
[0020] Figure 8 Schematic diagram A shows the extended form of the guide channel.
[0021] Figure 9 Schematic diagram B shows the extended form of the guide channel.
[0022] Figure 10 Schematic diagram C shows the extended form of the guide channel.
[0023] Figure 11 Schematic diagram D shows the extended form of the guide channel.
[0024] Figure 12 This is a schematic diagram showing the morphology of multiple sets of the aforementioned flow guide channels and liquid storage diffusion channels.
[0025] Figure 13 This is a schematic diagram showing the cross-sectional shape of the flow guide / liquid storage diffusion tank.
[0026] in:
[0027] 1-Top layer 1; 2-Core; 20-Covering fabric; 20A-Lower covering fabric; 20B-Upper covering fabric; 21-Absorbent; 22-Flow guiding layer; 23-Second absorbent; 3-Bottom layer; 4-Flow guiding groove; 5-Liquid storage and diffusion groove; 6-PE membrane layer. Detailed Implementation
[0028] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant 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.
[0029] Combination Figures 1 to 13 As shown, this utility model discloses a slotted absorbent with multi-level diffusion nodes, comprising a surface layer 1, a core 2, and a bottom layer 3 sequentially composited into one piece. The core 2 is composed of at least a covering fabric 20 and an absorbent 21 wrapped within the covering fabric 20. The core 2 has a guide groove 4 along its length. Each guide groove 4 consists of a front section and a rear section. The front and rear sections of the guide grooves are both based on their original width and depth, and are further expanded near the end to form a liquid storage diffusion groove 5.
[0030] Regarding the division between the front and rear sections of the drainage channel, absorbent products differentiate between the front and back directions of wear when in use. The end closer to the user's navel is considered the front, and the end closer to the buttocks is considered the back. Therefore, in absorbent products, the front section of the drainage channel is closer to the user's excretory organs, while the rear section is closer to the user's excretory organs. Furthermore, the terms "front and back," "left and right," and "front and back" mentioned later are also determined based on the direction the user is facing when wearing the absorbent product.
[0031] As a supplementary explanation, the slotted absorbent product of this utility model can also typically have a PE film layer 6 added between the core 2 and the bottom layer 3 to further prevent leakage and provide a certain degree of breathability as an auxiliary layer structure to optimize the leak-proof performance of the absorbent product. The structure of this utility model is applied to wearable absorbent products such as diapers, pull-up pants, and sanitary napkins. When applied to the above-mentioned different types of absorbent products, the slotted absorbent product of this utility model can also be adaptively set with structures such as front and back waistbands, elastic waistbands, or side wings and anti-leakage side panels, in order to meet the functional requirements of the absorbent product. All of these settings do not affect the correct functioning of the diversion channel 4 and the liquid storage and diffusion channel 5 of the absorbent product of this utility model during application.
[0032] Furthermore, the shape of the core 2 can be freely selected based on the differences in specific product types, such as straight strip, figure-eight, gourd, or wedge, without affecting the main technical solution of this utility model. This is directly related to the shape of the absorber 21 that acts on the main functional area of the core 2 rather than the external covering fabric 20.
[0033] Specific combination Figure 1 and Figure 2 As shown, when the human body urinates onto the absorbent, the liquid passes through the surface layer 1 and reaches the core 2 below. Guided by the guide channel 4, the liquid permeates the side wall of the guide channel 4 while flowing along the length of the guide channel 4, accelerating the permeation speed of the liquid on the core 2. When the liquid flows to the end of the guide channel 4, it will gather at the end of the guide channel 4. Since the guide channel 4 has a certain liquid storage capacity, the liquid will also permeate to both sides of the core 2 during the process of flowing to the end of the guide channel 4. When the liquid reaches the end of the guide channel 4, the total amount is much less than when it first comes into contact with the core 2, thus significantly suppressing the accumulation of liquid at the end of the guide channel 4 and controlling the side leakage of liquid.
[0034] Meanwhile, because the absorbent material is curved during use, unless a particularly large amount of liquid causes a surge, the liquid will eventually converge towards the central area of the core 2 along the surface of the arc-shaped guide channel 4 or the core 2. In other words, regardless of whether there are signs of leakage at the front and back, the liquid can hardly penetrate to both ends of the core due to the storage and buffering effect of the guide channel 4, thus avoiding leakage at the front and back.
[0035] More importantly, combining Figure 2 , Figures 7 to 12 As shown, the guide channel 4 forming the dispersed nodes of this utility model is also provided with a liquid storage and diffusion channel 5 near its own end or at the end position. The liquid storage and diffusion channel 5 is an auxiliary liquid buffer space structure with a relatively open local area, which is formed by further expanding the width and depth of the original guide channel 4 towards the width or length of the core 2. In terms of shape, the liquid storage and diffusion channel 5 is not limited to a certain single shape, but it must meet the basic requirement that the width W2 of the liquid storage and diffusion channel 5 is greater than the width W1 of the guide channel 4. In this utility model, the width ratio of the liquid storage and diffusion channel 5 to the guide channel 4 fluctuates within the range of 3:1 to 3:2 to avoid the guide channel 4 and the liquid storage and diffusion channel 5 being too large, thereby reducing the total amount of absorbent 21 and preventing the effective absorption area from becoming smaller. Furthermore, the absorbent 21 is made of a material with absorption properties, which can be single or composite, including but not limited to SAP, fluff pulp, water-absorbing fiber and other materials.
[0036] When the liquid flows along the guide channel 4, there is less obstruction from the surface layer 1 or the covering cloth 20 material. However, when it flows to the liquid storage and diffusion channel 5 at the dispersion node, the liquid velocity will decrease significantly due to the sudden increase in width. Its flow potential energy will be released by the liquid storage and diffusion channel 5, and then it will permeate along the surface plane of the core 2 at the position of the liquid storage and diffusion channel 5. The setting of the liquid storage and diffusion channel 5 of this utility model helps to improve the guiding and anti-side leakage / anti-front and rear leakage performance of the core 2.
[0037] More specifically, when the liquid flows from the longitudinally uniform guide channel 4 to each liquid storage and diffusion channel 5, the liquid, which was originally tending to flow in one direction, suddenly has no restrictions on both sides, causing the potential energy stored in the liquid to be released. The liquid suddenly diffuses in four directions in this area, resulting in a significant decrease in the liquid volume per unit area. The buffering effect of the multi-stage channel is more obvious, which is a significant difference compared to existing guide channel products. In the preferred embodiment, the liquid storage and diffusion channel 5 has 3 node positions on one channel according to human physiological characteristics, so that the liquid outflow at each position can be buffered in time. Existing straight channel guide channel products do not have this specific liquid storage and diffusion channel structure at the corresponding positions, so the effect is naturally slightly inferior.
[0038] like Figure 12As shown, the total number of the flow guide 4 and the liquid storage and diffusion tank 5 in this invention is not unique. Depending on the needs, one, two, three, or more flow guide 4 and associated liquid storage and diffusion tanks 5 can be opened on the surface of the core 2 to form a multi-level buffer structure. For users with large liquid flow rates, a greater number of flow guide 4 and liquid storage and diffusion tanks 5 can significantly improve the liquid flow guidance, storage, and buffering performance of the core 2. When discharge occurs, although the overall absorption capacity of such users' products is slightly lower than that of products with fewer tanks, the performance of preventing side leakage / prevention of front and rear leakage per unit time is improved. Those skilled in the art can select an appropriate combination of tank numbers in appropriate products based on specific user needs.
[0039] Combination Figure 2 , Figures 7 to 12 As shown, an additional liquid storage and diffusion tank is provided between the front and rear sections of the guide channel. This additional tank makes the length of the front section L1 of the guide channel shorter than the length of the rear section L2. The liquid storage and diffusion tank 5 at the front can be considered as an enhanced diffusion zone 1, covering the urination point of male infants and adult men. It can diffuse and absorb the liquid immediately after urine is excreted. At the same time, it provides temporary storage space for urine, especially when male infants are in a prone position, reducing the risk of front leakage. The liquid storage and diffusion tank 5 in the middle can be considered as an enhanced diffusion zone 2, which is the urination point of female infants or adult women. Based on the aforementioned principle, this area can also solve the problem of large local liquid output of the user. The liquid storage and diffusion tank 5 at the rear can be considered as an enhanced diffusion zone 3, which is the concentrated absorption area for excretion in the anal area of the user and the location where liquid gathers when the user is lying face up. The liquid storage and diffusion tank 5 in this area can play a good role in preventing back leakage and provide temporary storage space for urine.
[0040] like Figure 3 As shown, diaper rash in infants often occurs in the area near and between the two excretion openings. Therefore, in this invention, the front and rear sections of the drainage channel are separated by the liquid storage and diffusion groove 5 in the middle. The length L1 of the front section of the drainage channel is shorter than the length L2 of the rear section. Since the amount of liquid in the user's excretion area is usually greater than that in the excretion area, this length difference is very helpful in reducing the contact area between the user's skin and excrement and moisture. At the same time, it also increases air circulation and reduces the probability of diaper rash.
[0041] Combination Figure 3As shown in the preferred embodiment A of this utility model, the covering fabric 20 includes a lower covering fabric 20A that wraps around the bottom and both sides of the absorber 21 from bottom to top, and an upper covering fabric 20B that covers the top of the absorber 21. The upper covering fabric 20B is attached to the inner wall of the flow channel 4 and the liquid storage and diffusion channel 5. In this structure, the absorber 21 in the core 2 is wrapped by the complete covering fabric 20 structure, including the upper covering fabric 20B and the lower covering fabric 20A. The upper covering fabric 20B is in close contact with the inner wall of the flow channel 4 and the liquid storage and diffusion channel 5. Since the material of the covering fabric is usually a fabric with good flow conductivity, the liquid can be guided and penetrated immediately after contacting the upper covering fabric 20B, and the absorber 21 also obtains a faster response time.
[0042] Combination Figure 4 As shown in the preferred embodiment B of this utility model, the surface layer 1 covers the top of the upper covering fabric 20B and is only bonded to the upper covering fabric 20B at the flow channel 4 and the liquid storage and diffusion channel 5. This form of surface layer 1 is more inclined to the product structure that emphasizes a light and fluffy experience. This surface layer 1 has more breathable space. When the liquid passes through the surface layer 1 and comes into contact with the core 1 below, due to the rapid guiding and buffering effect of the flow channel 4 and the liquid storage and diffusion channel 5 of this utility model, the surface layer 1 is more likely to be free from the influence of the liquid on both sides of the channel structure. This part of the space provides help for breathability and also becomes a channel to assist the liquid infiltration.
[0043] Preferred, combined Figure 5 In the preferred embodiment C shown, a flow guiding layer 22 is further composited between the surface layer 1 and the upper covering fabric 20B, combined with... Figure 6 In the preferred embodiment D shown, a second absorber 23 may also be provided. The addition of the former can further improve the liquid permeability, so that the surface layer 1 can better maintain a dry touch. With the help of the flow guiding layer 22, the liquid will come into contact with the groove structure on the surface of the core 2 more quickly. Through the good flow guiding, storage, buffering and lateral diffusion permeation effect of the groove structure, the absorbent product can achieve a rapid absorption effect. The second absorber 23 can be set with the same material as the absorber 21, or a simpler single material can be used as an auxiliary absorption structure to increase the overall liquid absorption capacity of the absorbent product, and can selectively absorb some liquid to improve the liquid retention performance.
[0044] Combination Figure 2 and Figure 7 As shown, the shape of the liquid storage and diffusion tank 5 described above is not limited to a single type, such as... Figure 2 The liquid storage diffusion tank 5 shown is quadrilateral, as... Figure 7 The liquid storage diffusion tank 5 shown in Figure a is circular or elliptical, such as... Figure 7The liquid storage diffusion tank 5 shown in b is triangular, as... Figure 7 The liquid storage diffusion tank 5 shown in Figure c is V-shaped. Furthermore, the tank shape of the liquid storage diffusion tank 5 can be any one or a combination of several of these shapes, such as... Figure 7 In b, both triangles and quadrilaterals appear simultaneously; in the above shapes, since the liquid storage diffusion tanks 5 are all areas that extend beyond the core 2, the integrity and closure of the entire guide channel 4 structure are ensured.
[0045] Furthermore, in combination Figure 13 As shown, the cross-section of the liquid storage and diffusion tank 5 is rectangular or trapezoidal. When the liquid storage and diffusion tank 5 is trapezoidal, it can be either an isosceles regular trapezoid or an inverted isosceles trapezoid. In the case of a rectangle, the liquid penetration rate should be basically consistent across all thicknesses of the core 2. However, if an isosceles regular trapezoid is used, the liquid is more easily and gently stored in the liquid storage and diffusion tank 5 before being absorbed. Although the liquid is not immediately absorbed into the core 2, it has already detached from the surface layer 1 structure, thus improving the surface dryness of the absorbent. The latter is preferable; conversely, if an isosceles inverted trapezoidal shape is adopted, the liquid will come into contact with the side wall of the tank more quickly when it seeps vertically, so the core 2 will absorb the liquid earlier, which is equivalent to increasing the absorption speed of the core 2. For users, the absorbent product will show stronger absorption performance rather than storage performance; furthermore, the width of the liquid diffusion tank 5 is 6mm-30mm. This width is adapted to the size and specifications of the absorbent product and the user group. The width required by infant users is lower, while the width required by adult users is higher.
[0046] Hot melt adhesive is applied to the upper covering layer 20B (non-woven fabric or toilet paper) and the lower covering layer 20A (non-woven fabric or toilet paper) at the positions of the flow channel 4 and the liquid storage diffusion channel 5, so that the two are bonded together in the space without absorbent material. Then, the flow channel is reinforced again by applying pressure, hot pressing or ultrasonic waves through an additional pressure roller device. During the long-term use of urine immersion, the shape and flow guiding capacity of the flow channel are maintained, so that it can continue to function.
[0047] The surface layer 1 can also be coated with hot melt adhesive using the same process, and then reinforced by additional pressure rollers, hot pressing or ultrasonic methods to combine with the core 2 and maintain the same shape as the flow channel 4 and liquid storage diffusion channel 5 to maintain the performance and experience of the final product.
[0048] Combination Figures 8 to 11 As shown, preferably, at least one end of the guide groove 4 extends to the end of the core 2 along its length, such as... Figure 8As shown, the guide channel 4 extends a certain distance beyond the liquid storage and diffusion channel 5 at the opposite end of the absorbent material. This extension direction can also be the direction of the liquid storage and diffusion channel 5 at the forward end. Figure 10 In this case, both ends extend by a distance. In the above embodiment, the guide channel 4 and the liquid storage diffusion channel 5 are both located in the area of the core 2, forming a closed structure, resulting in the most ideal absorption and guiding effect; while... Figure 9 and Figure 11 As shown, the flow channel 4 extends to the end of the length of the core 2, making the flow channel 4 and the liquid storage and diffusion channel 5 form a semi-open state relative to the core 2. However, due to the binding effect of the lower coating layer 20A and the upper coating layer 20B, the core can still ensure the integrity of the structure. In cases where it is necessary to save the amount of absorbent 21, as long as the designed absorption capacity can meet the needs of the target user, the front and rear leakage phenomena can also be avoided. The liquid will be completely absorbed by the core 2 before flowing out of the core 1 area.
[0049] Furthermore, in combination Figure 13 As shown, referring to the aforementioned embodiment of the liquid storage and diffusion tank 5, the cross-section of the guide channel 4 can also be rectangular or trapezoidal. In the case of a trapezoid, it can also be a positive isosceles trapezoid or a negative isosceles trapezoid, and the effect obtained is similar to that of the liquid storage and diffusion tank 5. Therefore, its function will not be described in detail here. Similarly, based on the width ratio between the guide channel 4 and the liquid storage and diffusion tank 5, the width of the guide channel 4 is in the range of 2mm-20mm. For the same reason, this width can also be adapted to the size and specifications of the absorbent product and the user group.
[0050] In summary, this invention, based on the existing straight guide channel, further expands each guide channel 4 by setting two or more nodes of liquid storage and diffusion channels 5, thereby adding a liquid buffer area to the guide channel 4. The liquid storage and diffusion channels 5 at each node allow the unidirectional flowing liquid to release its kinetic energy and be converted into a four-way diffused stream, which facilitates rapid absorption by the core 2. This significantly reduces the liquid volume per unit area, and the liquid is guided to avoid accumulation in a certain place, which could cause oversaturation of the core 2, thus improving the absorption and utilization rate of the core.
[0051] Furthermore, due to the multi-node liquid storage and diffusion tanks 5, the guide channel 4 forms a multi-level arrangement trend, which also plays a good role in preventing leakage at both ends of the core. The liquid can also be fully absorbed in this area. From the actual test, the time and area of contact between the user's skin and excrement are reduced, allowing the user to feel a drier and more comfortable experience, which helps to improve the user's focus on life.
[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A slotted absorbent article of a diffusion node multistage arrangement, comprising a face sheet, a core and a back sheet which are integrally formed in sequence, the core being composed of at least a cover cloth and an absorbent body wrapped therein, characterized in that, The core is provided with flow guide grooves along the length direction of the core, each flow guide groove is composed of a front flow guide groove section and a rear flow guide groove section, the front flow guide groove section and the rear flow guide groove section are further expanded at a position close to the end based on the original width and depth, and a liquid storage diffusion groove is provided.
2. The slotted absorbent article of claim 1 wherein, The front flow guide groove section and the rear flow guide groove section are provided with an additional liquid storage diffusion groove, and the length of the front flow guide groove section is less than that of the rear flow guide groove section.
3. The slotted absorbent article of claim 1 wherein, The cover cloth comprises a lower cover cloth wrapped around the bottom and both sides of the absorbent in the width direction and an upper cover cloth covering the top of the absorbent, the upper cover cloth is attached to the inner wall of the flow guide groove and the liquid storage diffusion groove.
4. The slotted absorbent article of claim 3 wherein, The surface layer covers the top of the upper cover cloth, and is only combined with the upper cover cloth at the flow guide groove and the liquid storage diffusion groove.
5. The slotted absorbent article of claim 3 wherein, The second absorbent is further combined between the surface layer and the upper cover cloth.
6. The slotted absorbent article of claim 1 wherein, The liquid storage diffusion groove is any one or a combination of several of quadrilateral, circle, ellipse, triangle and V shape, the cross section of the liquid storage diffusion groove is rectangular or trapezoidal, and the width of the liquid storage diffusion groove is 6-30 mm.
7. The slotted absorbent article of claim 1 wherein, The flow guide groove extends to at least one end of the length direction of the core, the cross section of the flow guide groove is rectangular or trapezoidal, and the width of the flow guide groove is 2-20 mm.