A composite wick having an enhanced absorbent layer

Abstract

The utility model discloses a kind of composite core with enhanced absorption layer, the core body includes by upper and lower sequentially arranged core surface layer, absorption layer and core bottom layer, the absorption layer includes at least two high molecular material layers of strip-shaped layout, horizontal clamping is provided with flow guide tape between two adjacent high molecular material layers, in the core body of the product, high molecular material layer in absorption layer is set along the longitudinal extension of absorption layer with strip, form hollow groove between two adjacent high molecular material layers, the contact area of high molecular material layer and liquid is increased using the hollow groove, while embedding the flow guide tape in the hollow groove, using the three-dimensional structure in the flow guide tape, the flow of liquid is accelerated to infiltrate, liquid is fully diffused in absorption layer, effectively enhance the absorption rate of core body whole.

Description

Technical Field

[0001] This utility model relates to the field of absorbent materials technology, specifically to a composite core with an enhanced absorbent layer. Background Technology

[0002] Disposable diapers are disposable hygiene products made of non-woven fabric and an absorbent core, primarily used to absorb urine and other excrement. The part of the diaper that absorbs urine is the absorbent core, which is an important component in the manufacture of disposable hygiene products such as diapers, sanitary napkins, and panty liners.

[0003] Composite cores are a common absorbent core structure used in domestic diapers, mainly composed of non-woven fabric, superabsorbent polymer (SAP), and fluffy cotton. SAP can quickly absorb and retain a large amount of liquid even under certain pressure, making it a widely used absorbent material in diapers.

[0004] However, when SAP comes into contact with water, it expands in volume and forms a gel-like substance. The formation of the gel hinders the diffusion of liquid in all directions, affecting the liquid's absorption. This phenomenon is called gel blockage. Once gel blockage occurs in the SAP inside the diaper, the diffusion of liquid inside the diaper will not be sufficient, affecting the absorption speed of the liquid and potentially causing skin rashes. Due to the high molecular weight gel blockage, the SAP utilization rate in diapers with composite cores on the market is usually low, as urine cannot diffuse to both ends, resulting in waste. Utility Model Content

[0005] To address the technical deficiencies in the background technology, this utility model proposes a composite core with an enhanced absorption layer, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A composite core with an enhanced absorption layer includes a core body, the core body including a core surface layer, an absorption layer and a core bottom layer arranged sequentially from top to bottom, the absorption layer including at least two strip-shaped polymer material layers, and a flow guide strip horizontally sandwiched between adjacent two polymer material layers; The flow guiding strip includes a flow guiding surface layer, a flow guiding line layer, and a flow guiding bottom layer. The flow guiding line layer is composed of several composite lines whose two ends are respectively connected to the flow guiding surface layer and the flow guiding bottom layer, so that several flow guiding channels composed of composite lines are formed between the flow guiding surface layer and the flow guiding bottom layer. The composite lines of the flow guiding line layer are composed of 1F~576F fiber filaments. The flow guiding surface layer extends beyond or is flush with the top surface of the absorption layer in the thickness direction of the absorption layer.

[0006] As an improvement to the above solution, after the core surface layer, the absorption layer and the core bottom layer are combined to form the core body, the edges on both sides of the core body are folded and shaped towards the center of the core body.

[0007] As an improvement to the above solution, the polymer material layer is made of SAP polymer particles and wood pulp, and is arranged in strips along the longitudinal direction of the core body. The core surface layer and the core bottom layer are attached to the two end faces of the absorbent layer, thereby forming a hollow groove between two adjacent polymer material layers. The guide strip is embedded in the hollow groove.

[0008] As an improvement to the above solution, the absorbent layer further includes a fluffy layer, on which several polymer material layers are evenly distributed on both sides, thereby forming several hollow grooves on both sides of the fluffy layer. The bottom of the hollow grooves is lower than or flush with the top surface of the fluffy layer in the thickness direction.

[0009] As an improvement to the above solution, the flow guiding surface layer and the flow guiding bottom layer are composed of composite yarns interwoven with 24F~288F and 25D~150D. The composite yarns of the flow guiding layer are composed of a first fiber of 1F and 20D~200D, and a second fiber of 12F~288F and 0.2~8D monofilament bundled together. The content of the first fiber in the mixture ranges from 0% to 87.5%, and the content of the second fiber bundle in the mixture ranges from 12.5% ​​to 100%.

[0010] As an improvement to the above scheme, the composite line is composed of a single first fiber and / or a bundle of second fibers. The composite lines composed of the first fibers and the composite lines composed of the bundles of second fibers are arranged linearly along the width or length direction of the flow-guiding reinforcement layer. The linear arrangement follows the rule that 1 to 3 bundles of second fibers are alternately arranged after every 0 to 7 bundles of first fibers.

[0011] As an improvement to the above solution, the fluffy layer is provided with a through groove along the thickness direction at the position corresponding to the hollow groove, the through groove connects the hollow grooves on both ends of the fluffy layer, and the guide strip is embedded in the through groove.

[0012] The beneficial effects of this invention are as follows: In the core body of this product, the polymer material layer in the absorption layer is arranged in strips along the longitudinal direction of the absorption layer, and a hollow groove is formed between two adjacent polymer material layers. The hollow groove increases the contact area between the polymer material layer and the liquid. At the same time, the guide strip is embedded in the hollow groove. The three-dimensional structure of the guide strip accelerates the flow and infiltration of the liquid, and the liquid is fully diffused in the absorption layer, effectively enhancing the overall absorption rate of the core. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the first technical solution structure of the core body of this utility model. Figure 1 .

[0014] Figure 2 This is a schematic diagram of the core structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the first technical solution structure of the core body of this utility model. Figure 2 .

[0016] Figure 4 This is a schematic diagram of the second technical solution structure of the core body of this utility model. Figure 1 .

[0017] Figure 5 This is a schematic diagram of the second technical solution structure of the core body of this utility model. Figure 2 .

[0018] Figure 6 This is a schematic diagram of the guide strip structure of this utility model.

[0019] Among them: 1-core body, 2-core surface layer, 3-absorption layer, 31-polymer material layer, 32-hollow groove, 33-fluffy layer, 34-through groove, 4-core bottom layer, 5-guide strip, 51-guide surface layer, 52-guide line layer, 521-composite line, 522-guide channel, 53-guide bottom layer. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 5 As shown, a composite core with an enhanced absorption layer includes a core body 1. The core body 1 includes a core surface layer 2, an absorption layer 3, and a core bottom layer 4 arranged sequentially from top to bottom. The absorption layer 3 includes at least two strip-shaped polymer material layers 31, with a horizontally spaced guide band 5 between adjacent polymer material layers 31. The number of guide bands 5 is at least one, dividing the absorption layer 3 into at least two strip-shaped polymer material layers 31. Figures 2 to 4All of them show the cross-sectional effect diagram of the absorption layer 3 when there is more than one flow guide 5. However, under normal circumstances, only one flow guide 5 is set (that is, the absorption layer 3 is divided into two strip-shaped polymer material layers 31). The structure of the core body 1 can better achieve the technical effect of the liquid rapidly seeping down from the center of the core body 1, flowing towards both ends of the core body 1, and diffusing and absorbing from both sides of the core body 1 as expected by this utility model. like Figure 3 As shown, in the first technical solution of the core body 1 of this utility model, the core body 1 includes an absorbent layer 3 and a core surface layer 2 and a core bottom layer 4 covering the absorbent layer 3. The absorbent layer 3 is composed of a polymer material layer 31 and a flow guide 5. The polymer material layer 31 is composed of SAP water-absorbing particles and wood pulp mixed together, and is arranged in strips extending longitudinally along the core body 1 and spaced apart along the width direction of the core body 1. The flow guide 5 is sandwiched between two adjacent polymer material layers 31. It should be noted that the core body 1 in this scheme is relatively thin. After the liquid passes through the core surface layer 2 and enters the absorption layer 3, the side of the polymer material layer 31 closest to the core surface layer 2 comes into contact with the liquid first and absorbs the liquid. Some of the liquid seeps down along the guide band 5 in the hollow groove 32 to the bottom of the polymer material layer 31 and comes into contact with the SAP water-absorbing particles at the bottom of the polymer material layer 31, effectively enhancing the overall absorption rate of the core. like Figure 4 As shown, in the second technical solution of the core body 1 of this utility model, the core body 1 includes an absorption layer 3 and a core surface layer 2 and a core bottom layer 4 covering the absorption layer 3. The absorption layer 3 is composed of a fluffy layer 33, a polymer material layer 31 and a flow guide 5. The polymer material layer 31 is respectively disposed on the upper and lower sides of the fluffy layer 33, that is, one polymer material layer 31 is sandwiched between the fluffy layer 33 and the core surface layer 2, and another polymer material layer 31 is sandwiched between the fluffy layer 33 and the core bottom layer 4, thereby forming hollow grooves 32 on both the upper and lower surfaces of the fluffy layer 33. The flow guide 5 is embedded in the hollow grooves 32 on both the upper and lower surfaces of the fluffy layer 33. It should be noted that the core body 1 in this solution is thicker than that in the first technical solution. The gaps in the hollowed-out grooves 32 and the thickness of the fluffy layer 33 provide sufficient space for the polymer material layer 31 to absorb water and expand, allowing the polymer material layer 31 to expand fully after absorbing water, thereby further improving the core's absorption capacity and water-locking performance. At the same time, the fluffy layer 33 increases the softness and comfort of the core, making it more comfortable for the user to wear.

[0022] like Figure 6As shown, in the technical solution of the guide strip 5 of this utility model, the guide strip 5 includes a guide surface layer 51, a guide line layer 52, and a guide bottom layer 53. The guide line layer 52 is composed of several composite lines 521 whose two ends are respectively connected to the guide surface layer 51 and the guide bottom layer 53, so that several guide channels 522 composed of composite lines 521 are formed between the guide surface layer 51 and the guide bottom layer 53. The composite lines 521 of the guide line layer 52 are formed by bundling fibers of 1F to 576F. The guide surface layer 51 extends beyond or is flush with the top surface of the absorption layer 3 in the thickness direction of the absorption layer 3.

[0023] The flow-guiding layer 52 is composed of several composite lines 521 whose two ends are respectively connected to the flow-guiding surface layer 51 and the flow-guiding bottom layer 53, thereby forming several flow-guiding channels 522 composed of composite lines 521 between the flow-guiding surface layer 51 and the flow-guiding bottom layer 53. The composite lines 521 of the flow-guiding layer 52 are composed of 1F to 576F fibers. In this three-layer three-dimensional structure, the flow-guiding surface layer 51 and the flow-guiding bottom layer 53 provide fixed anchor points for the middle flow-guiding layer 52, allowing it to be arranged in the height / thickness direction in the length and width plane. The flow-guiding channels 522 are constructed through the capillary gaps between the composite lines 521 or the gaps between adjacent composite lines 521. Specifically, the gaps between adjacent composite lines 521 inherently provide space for flow guidance and infiltration. The composite line 521 itself is formed by bundling multiple fiber filaments, and the small spaces between the fiber filaments can create the force conditions required for capillary effect. When the bundle of composite lines 521 is sufficiently dense, the spaces between adjacent composite lines 521 can also create the force conditions required for capillary effect. Therefore, the flow channel 522 is formed and provides the corresponding flow guidance and infiltration effect through a combination of capillary effect and gap channels. Furthermore, a hydrophilic oil agent can be coated on the surface of the fiber filaments of the flow line layer 52 to make it more hydrophilic and enhance its flow guidance performance.

[0024] In one technical solution, after the core body 1 is formed by the composite of the core surface layer 2, the absorbent layer 3, and the core bottom layer 4, the edges on both sides of the core body 1 are folded and shaped towards the center of the core body 1, thereby forming a groove in the center of the core body 1. The width of the groove on the upper surface of the core body 1 is 1 / 5 to 1 / 2 of the width of the core body 1. For the groove in the center of the core body 1, with a certain thickness of the body, it can provide an effective space for a large amount of liquid to be contained instantly; and it can also make the core itself maintain better integrity and comfort.

[0025] In the technical solution of the present invention, the polymer material layer 31 is made of SAP polymer particles and wood pulp, and is arranged in strips along the longitudinal direction of the core body 1. The core surface layer 2 and the core bottom layer 4 are attached to the two end faces of the absorbent layer 3, thereby forming a hollow groove 32 between two adjacent polymer material layers 31. The guide strip 5 is embedded in the hollow groove 32.

[0026] like Figure 5 As shown, in the second technical solution of the core body 1, the absorbent layer 3 further includes a fluffy layer 33. Several polymer material layers 31 are evenly distributed on both ends of the fluffy layer 33, thereby forming several hollow grooves 32 on both ends of the fluffy layer 33. The bottom of the hollow grooves 32 is lower than or flush with the top surface of the fluffy layer 33 in the thickness direction. In this technical solution of the fluffy layer 33, the bottom of the guide band 5 can be embedded in the fluffy layer 33, which can effectively help the liquid pass through the fluffy layer 33 and enter the polymer material layer 31 located below the fluffy layer 33.

[0027] Furthermore, in the above scheme, the fluffy layer 33 is provided with a through groove 34 opened along the thickness direction at the position corresponding to the hollow groove 32. The through groove 34 connects the hollow groove 32 on both end faces of the fluffy layer 33. The guide band 5 is embedded in the through groove 34, and the upper and lower layers of the fluffy layer 33 are directly connected by the through groove 34. After the guide band 5 is embedded in the through groove 34, the liquid can directly enter the lower layer of the fluffy layer 33 through its guide channel 522.

[0028] Furthermore, in the above scheme, the flow guiding surface layer 51 and the flow guiding bottom layer 53 are interwoven with composite yarns 521 of 24F~288F and 25D~150D. The composite yarns 521 of the flow guiding layer 52 are composed of first fibers of 1F and 20D~200D and second fibers of 12F~288F and 0.2~8D monofilaments bundled together. The content of the first fibers in the mixture ranges from 0% to 87.5%, and the content of the second fiber bundles in the mixture ranges from 12.5% ​​to 100%. The second fiber bundles refer to a mixture of several 1F and 0.2~8D second fibers bundled together according to the corresponding F number.

[0029] Furthermore, in the above scheme, the composite line 521 is formed by a single bundle of first fiber / second fiber filaments. The composite line 521 composed of first fiber and the composite line 521 composed of second fiber bundle are arranged linearly along the width or length direction of the flow-guiding reinforcement layer. The linear arrangement follows the rule that one bundle of second fiber bundle is arranged alternately after every 0 to 7 bundles of first fiber composite line 521.

[0030] It should be noted that the composite line 521 can provide a stable anchor point for the guide line layer, improve the stability of the finished structure of the guide strip, and at the same time, an appropriate F number range can help to form a sufficient number and density of fine pores within the width of the guide surface layer 51 and the guide bottom layer 53. 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 composite core with an enhanced absorption layer, characterized in that, The core body (1) includes a core surface layer (2), an absorption layer (3) and a core bottom layer (4) arranged from top to bottom. The absorption layer (3) includes at least two strip-shaped polymer material layers (31) with a horizontal flow guide strip (5) sandwiched between adjacent polymer material layers (31). The flow guide (5) includes a flow guide surface layer (51), a flow guide line layer (52), and a flow guide bottom layer (53). The flow guide line layer (52) is composed of several composite lines (521) with their two ends connected to the flow guide surface layer (51) and the flow guide bottom layer (53) respectively, so that several flow guide channels (522) composed of composite lines (521) are formed between the flow guide surface layer (51) and the flow guide bottom layer (53). The composite lines (521) of the flow guide line layer (52) are composed of 1F~576F fiber filaments. The flow guide surface layer (51) extends beyond or is flush with the top surface of the absorption layer (3) in the thickness direction of the absorption layer (3).

2. The composite core with an enhanced absorption layer according to claim 1, characterized in that, After the core body (1) is formed by the composite of the core surface layer (2), the absorption layer (3) and the core bottom layer (4), the edges of the two sides of the core body (1) are folded towards the center of the core body (1) for shaping.

3. The composite core with an enhanced absorption layer according to claim 1, characterized in that, The polymer material layer (31) is made of SAP polymer particles and wood pulp, and is arranged in strips along the longitudinal direction of the core body (1). The core surface layer (2) and the core bottom layer (4) are attached to the two end faces of the absorbent layer (3), thereby forming a hollow groove (32) between two adjacent polymer material layers (31). The guide strip (5) is embedded in the hollow groove (32).

4. The composite core with an enhanced absorption layer according to claim 3, characterized in that, The absorbent layer (3) also includes a fluffy layer (33), on which several polymer material layers (31) are evenly distributed on both sides, thereby forming several hollow grooves (32) on both sides of the fluffy layer (33). The bottom of the hollow grooves (32) is lower than or flush with the top surface of the fluffy layer (33) in the thickness direction of the fluffy layer (33).

5. The composite core with an enhanced absorption layer according to claim 1, characterized in that, The flow guiding surface layer (51) and the flow guiding bottom layer (53) are composed of interwoven composite yarns (521) of 24F~288F and 25D~150D. The composite yarns (521) of the flow guiding layer (52) are composed of a first fiber of 1F and 20D~200D and a second fiber of 12F~288F and 0.2~8D monofilament bundled together. The content of the first fiber in the bundle is 0%~87.5%, and the content of the second fiber bundle in the bundle is 12.5%~100%.

6. The composite core with an enhanced absorption layer according to claim 5, characterized in that, The composite line (521) is composed of a single first fiber and / or a single second fiber bundle. The composite line (521) composed of the first fiber and the composite line (521) composed of the second fiber bundle are arranged linearly along the width or length direction of the flow-guiding reinforcement layer. The linear arrangement is arranged in a pattern where 1 to 3 composite lines (521) composed of the second fiber bundle are arranged alternately after every 0 to 7 bundles of the first fiber composite line (521).

7. The composite core with an enhanced absorption layer according to claim 4, characterized in that, The fluffy layer (33) has a through groove (34) opened along the thickness direction at the position corresponding to the hollow groove (32). The through groove (34) connects the hollow groove (32) on both sides of the fluffy layer (33), and the guide strip (5) is embedded in the through groove (34).

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