A dry sanitary absorbent article

Abstract

The utility model provides a kind of dry and clean absorbent article, including the liquid-permeable surface layer, absorbent layer and breathable bottom layer sequentially arranged from top to bottom;Wherein, the liquid-permeable surface layer includes first flow guide layer and second flow guide layer sequentially arranged from top to bottom, the surface of second flow guide layer is equipped with the continuous wave structure extending along width direction, continuous wave structure is made of protruding portion and recess portion alternately arranged, and continuous wave structure is symmetrical left and right relative to the center plane of second flow guide layer width direction.The liquid-permeable surface layer is set to first flow guide layer and second flow guide layer, the surface of second flow guide layer is equipped with protruding portion and recess portion alternately arranged along width direction, and it is symmetrical left and right relative to the center plane of second flow guide layer width direction, multiple recess structures can form longitudinal flow guide groove, guide liquid to absorbent layer permeation, avoid gathering in liquid-permeable surface layer, so that the sanitary absorbent article in the utility model has surface dry, fast absorption speed, high absorption and other properties.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, and in particular to a dry and hygienic absorbent product. Background Technology

[0002] With the development of the times, consumers have increasingly higher requirements for sanitary absorbent products, demanding that they possess properties such as fast absorption, dryness, high absorbency, and softness. As a result, major sanitary absorbent product companies across the country have conducted various studies to improve their products.

[0003] The basic structure of absorbent sanitary products generally consists of a liquid-permeable surface material, a liquid-guiding material, an absorbent core covering material, the absorbent core itself, and a breathable but liquid-impermeable bottom layer material. Other components, such as functional cores and cover sheets, are added according to specific requirements. However, existing absorbent sanitary products have a slow absorption rate and tend to leave a lot of residue on the liquid-permeable surface layer, easily causing a sticky and uncomfortable feeling.

[0004] Therefore, there is an urgent need for a dry and hygienic absorbent product that combines rapid absorption with a dry and comfortable feel. Summary of the Invention

[0005] This invention provides a dry and hygienic absorbent product with the advantages of fast absorption and dry comfort.

[0006] To achieve the above objectives, this utility model provides a dry and hygienic absorbent product, comprising a liquid-permeable surface layer, an absorbent layer, and a breathable bottom layer arranged sequentially from top to bottom; wherein, the liquid-permeable surface layer includes a first guide layer and a second guide layer arranged sequentially from top to bottom, the surface of the second guide layer is provided with a continuous wave structure extending along the width direction, the continuous wave structure is composed of alternating protrusions and depressions, and the continuous wave structure is symmetrical about left and right with respect to the center plane of the second guide layer in the width direction.

[0007] Preferably, the second flow guiding layer is polyurethane foam.

[0008] Preferably, the height of the protrusion increases continuously from the center of the liquid-permeable surface in the width direction to both sides.

[0009] Preferably, the increase in the height of two adjacent protrusions is 0.2-0.4 mm.

[0010] Preferably, the first flow guiding layer is a hot air nonwoven fabric or a spunbond nonwoven fabric, wherein the hot air nonwoven fabric or the spunbond nonwoven fabric contains occult blood fibers.

[0011] Preferably, the protrusion and the recess are provided with at least one through hole.

[0012] Preferably, the through hole includes a first opening, a second opening, and a transition through hole, wherein the transition section connects the first opening and the second opening, and extends from the liquid-permeable surface layer to the air-permeable bottom layer. The radial cross-sectional dimension of the first opening decreases continuously, and the radial cross-sectional dimension of the second opening increases continuously.

[0013] Preferably, the maximum diameter of the first opening is greater than the maximum diameter of the second opening, and the minimum diameter of the second opening is the same as the minimum diameter of the first opening.

[0014] More preferably, the diameter of the first opening is 2-4 mm, and the diameter of the second opening is 1-2 mm.

[0015] Preferably, the absorbent layer is composed of at least one layer of wet-process superabsorbent resin paper wrapped with wet-process superabsorbent resin paper.

[0016] Preferably, the surface of the central region of the absorbent layer has several slits, the length of which is 3-8 mm.

[0017] Compared with the prior art, the present invention has at least the following advantages: In this invention, the permeable surface layer is configured from top to bottom as a first guide layer and a second guide layer. The surface of the second guide layer has a continuous wave-like structure extending along the width direction. This continuous wave-like structure is composed of alternating protrusions and depressions, and is symmetrical about the center plane of the second guide layer in the width direction. Multiple depressions can form longitudinal guide grooves to guide liquid to penetrate into the absorbent layer and prevent it from accumulating on the permeable surface layer. The first guide layer and the second guide layer work together to make the sanitary absorbent product of this invention have the properties of a dry surface, fast absorption speed, and high absorbency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a dry and hygienic absorbent product provided by this utility model; Figure 2 This is a schematic diagram of the structure of the second flow guiding layer in the liquid-permeable surface layer provided by this utility model; Figure 3 This is a schematic diagram of the structure of the absorption layer provided by this utility model; In the diagram: 100: permeable surface layer; 200: absorbent layer; 300: breathable bottom layer; 101: first guide layer; 102: second guide layer; 1021: protrusion; 1022: depression; 103: through hole; 1031: first opening; 1032: second opening; 201: slit. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] This utility model embodiment provides a dry and hygienic absorbent product, such as... Figure 1 As shown, it includes a liquid-permeable surface layer 100, an absorbent layer 200, and a breathable bottom layer 300 arranged sequentially from top to bottom; wherein, the liquid-permeable surface layer 100 includes a first flow guiding layer 101 and a second flow guiding layer 102 arranged sequentially from top to bottom, the surface of the second flow guiding layer 102 is provided with a continuous wave structure extending in the width direction, the continuous wave structure is composed of alternating protrusions 1021 and recesses 1022, and the continuous wave structure is symmetrical about left and right with respect to the center plane of the second flow guiding layer 102 in the width direction.

[0021] In this invention, the liquid-permeable surface layer 100 is configured from top to bottom as a first guide layer 101 and a second guide layer 102. The surface of the second guide layer 102 is provided with a continuous wave-shaped structure extending along the width direction. This continuous wave-shaped structure is composed of alternating protrusions 1021 and recesses 1022, and is symmetrical about left and right with respect to the center plane of the width direction of the second guide layer 102. Multiple recesses can form longitudinal guide channels to guide liquid to penetrate into the absorbent layer 200 and avoid accumulation in the liquid-permeable surface layer 100. The first guide layer 101 and the second guide layer 102 cooperate with each other, so that the sanitary absorbent product of this invention has the properties of a dry surface, fast absorption speed, and high absorbency.

[0022] In this utility model Figure 1 In this invention, the structural layers are peeled off from each other. This is to clearly show the positional relationship between the structural layers of this invention. However, it should be understood that the structural layers of this invention are actually tightly fitted and / or partially fitted together.

[0023] According to some preferred embodiments, the second flow guiding layer 102 is polyurethane foam.

[0024] In this invention, by using hydrophilic polyurethane foam as the second flow guiding layer 102, it is possible to ensure that the second flow guiding layer 102 has a good elastic recovery rate and liquid absorption performance.

[0025] like Figure 2As shown, according to some preferred embodiments, the protrusion height of the protrusion 1021 increases continuously from the center of the liquid-permeable surface 100 in the width direction to both sides.

[0026] According to some preferred embodiments, the increase in the protrusion height of two adjacent protrusions 1021 is 0.2-0.4 mm (for example, it can be 0.2 mm, 0.3 mm or 0.4 mm).

[0027] In this invention, by setting a number of alternating protrusions 1021 and recesses 1022 along the width direction of the polyurethane foam, the liquid absorption speed of the polyurethane foam can be enhanced. Furthermore, the protrusions 1021 gradually rise from the center to both sides of the edge, forming a microstructure similar to a dike. When liquid seeps into the low protrusion area in the center, it is driven by gravity to converge towards the center area, quickly adsorbing the liquid through capillary effect, and is physically blocked by the rising protrusions on both sides, thereby greatly reducing the diffusion of liquid to the sides and reducing the risk of side leakage. In addition, the multiple recesses can form a longitudinal channel to guide the liquid to permeate into the main absorbent layer 200, thereby ensuring the good liquid absorption performance of the absorbent layer 200. At the same time, the overall structure presents a low center and high sides structure, which can better fit the user, not only improving comfort but also reducing liquid leakage from the seams.

[0028] It should be noted that the specific shape of the cross-section of the protrusion and the recess is not specifically limited in this utility model. For example, it can be rectangular or cylindrical.

[0029] According to some preferred embodiments, the protrusion 1021 and the recess 1022 are provided with at least one through hole 103.

[0030] According to some preferred embodiments, the through hole 103 includes a first opening 1031 and a second opening 1032 connected vertically, extending from the liquid-permeable surface layer 100 to the air-permeable bottom layer 300. The radial cross-sectional dimension of the first opening 1031 decreases continuously, while the radial cross-sectional dimension of the second opening 1032 increases continuously.

[0031] In this invention, by providing through holes 103 in each recess 1022 and protrusion 1021, the liquid absorption speed of the absorbent layer 200 can be enhanced. Furthermore, the cross-sectional dimensions of the first opening 1031 continuously decrease to form a positive funnel shape, and the radial cross-sectional dimensions of the second opening 1032 continuously increase to form an inverted funnel shape, so that the entire through hole 103 has an hourglass-shaped structure. When liquid seeps down, the protruding structure guides the liquid to flow longitudinally, avoiding the edge leak-proof area. The first opening 1031 on the surface of the protrusion 1021 and the recess 1022 can reduce surface tension resistance, quickly capture the liquid, and accelerate the rapid seepage of the liquid to the absorbent layer 200 for absorption through the second opening 1032. It can also effectively prevent the backflow of liquid. At the same time, the through hole 103 is not easy to collapse when the structure is under pressure.

[0032] According to some preferred embodiments, the maximum diameter of the first opening 1031 is greater than the maximum diameter of the second opening 1032, and the minimum diameter of the second opening 1032 is the same as the minimum diameter of the first opening 1031. The maximum diameter of the first opening 1031 is 2-4 mm (e.g., 2 mm, 3 mm, or 4 mm), and the diameter of the second opening 1032 is 1-2 mm (e.g., 1 mm, 1.5 mm, or 2 mm).

[0033] In this invention, the maximum aperture of the first opening 1031 is larger than the maximum aperture of the second opening 1032, and the minimum apertures (i.e., the contact positions) of the two are the same. This allows the liquid to permeate unidirectionally under the dual drive of gravity and capillary force, accelerating the rapid infiltration and conduction of the liquid to the absorption layer 200 for absorption, and effectively preventing the backflow of the liquid.

[0034] According to some preferred embodiments, the first flow guiding layer 101 is a hot air nonwoven fabric or a spunbond nonwoven fabric, which contains occult blood fibers.

[0035] In this invention, the first diversion layer 101 is made of hot-air nonwoven fabric and spunbond nonwoven fabric containing cryptovascular fibers. This allows the first diversion layer 101 to better absorb blood and promote infiltration, preventing blood from sticking to the mesh surface. Furthermore, it works in conjunction with the second diversion layer 102 to ensure the dryness and comfort of the liquid-permeable surface layer 100. The hot-air nonwoven fabric or spunbond nonwoven fabric containing cryptovascular fibers in this invention is commercially available.

[0036] According to some preferred embodiments, the absorbent layer 200 is composed of at least one layer of wet-process superabsorbent resin paper wrapped with wet-process superabsorbent resin paper.

[0037] In this invention, multi-layer superabsorbent resin composite paper is used as the absorbent layer 200. This material has good liquid absorption and retention properties, and the basis weight of the superabsorbent resin paper is 30~300g / m³. 2 Preferably 70~150g / m 2 .

[0038] like Figure 3 As shown, according to some preferred embodiments, the surface of the central region of the absorbent layer 200 is provided with a plurality of slits 201, the length of which is 3-8 mm (for example, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm).

[0039] In this invention, the absorbent layer 200 is made of wet-process superabsorbent resin absorbent paper. This material can absorb and retain liquid in the first time, ensuring the dryness of the surface. By setting several slits 201 on the surface of at least one layer of superabsorbent resin, the slits 201 can promote the liquid to preferentially penetrate along the longitudinal direction of the slits 201 and guide the liquid to diffuse from the center to the surrounding area (preventing local saturation), thereby ensuring the excellent liquid absorption speed and utilization rate of the absorbent layer 200.

[0040] It should be noted that the shape and spacing of the slits and the height of the protrusions are not specifically limited in this utility model, and can be selected according to actual needs, such as being long strips or wavy shapes.

[0041] According to some preferred embodiments, the breathable bottom layer is a PE breathable membrane.

[0042] In this invention, a waterproof and breathable PE membrane is used as the breathable bottom layer, thereby preventing liquid leakage while ensuring good breathability of the sanitary absorbent.

[0043] To more clearly illustrate the technical solution and advantages of this utility model, the following description, in conjunction with embodiments, further explains this utility model.

[0044] Example 1 A dry and hygienic absorbent product, comprising, from top to bottom, a liquid-permeable surface layer, an absorbent layer (one layer of wet-laid superabsorbent resin paper wrapped with two layers of wet-laid superabsorbent resin paper, with a basis weight of 150g / m²), and an absorbent layer. 2The liquid-permeable surface layer consists of a first diversion layer (spunbond nonwoven fabric containing 40% occult blood fibers) and a second diversion layer (polyurethane foam, 2mm thick), arranged sequentially from top to bottom. The surface of the second diversion layer has a continuous wave-like structure extending along the width direction. The continuous wave-like structure is composed of alternating protrusions and depressions. The continuous wave-like structure is symmetrical about the center plane of the second diversion layer in the width direction. From the center plane of the liquid-permeable surface layer in the width direction to the two side edges, the protrusion height of the protrusions increases continuously. The height of the protrusions increases continuously from the center plane of the liquid-permeable surface layer in the width direction to the two side edges. The height of the protrusion increases by 0.3 mm; each protrusion and each depression has a through hole, which includes a first opening and a second opening connected vertically. From the liquid-permeable surface layer to the air-permeable bottom layer, the radial cross-sectional dimension of the first opening decreases continuously, and the radial cross-sectional dimension of the second opening increases continuously. The maximum diameter of the first opening is 2 mm and the minimum diameter is 1 mm. The maximum diameter of the second opening is 1.5 mm and the minimum diameter is 1 mm. The central area of ​​each layer of wet-process super absorbent resin paper has 3 slits, and the length of each slit is 6 mm.

[0045] Example 2 Example 2 is basically the same as Example 1, except that the polyurethane foam has the same type of through holes as in Example 1, but no protrusions or recesses are provided.

[0046] Example 3 Example 3 is basically the same as Example 1, except that in the polyurethane foam, the protrusion height of the protrusions is the same from the center of the second flow guide layer in the width direction to both sides.

[0047] Comparative Example 1 Comparative Example 1 is a commercially available fluff pulp structure product. The liquid-permeable surface layer is ordinary hot-air nonwoven fabric, the flow guide is hot-air flow guide nonwoven fabric, the wrapping is spunbond fabric, the absorbent core is fluff pulp and superabsorbent resin (mass ratio of 3:1), and the breathable bottom layer is PE breathable membrane.

[0048] In this invention, the performance of the dry and hygienic absorbent products in Examples 1 to 3 was tested, and the performance test results are shown in Table 1. Performance testing methods: Take 5mL of animal blood and add it to the sanitary napkin. Record the absorption time as the absorption rate in seconds. For reverse osmosis, after adding liquid to the sanitary napkin for 5 minutes, place a 1.2kg weight on 10g of filter paper on the sanitary absorbent product for 1 minute and weigh the increase in weight of the filter paper in grams. For leak-proof performance testing, lay the sample flat on a plane with an inclination angle of 45°, add 5mL of liquid to the center point, place a weighing dish below, observe whether there is any leakage, and weigh it in grams.

[0049] Table 1 As shown in Table 1, the sanitary absorbent product in this embodiment of the invention has less surface residue, faster absorption of animal blood, and better dryness, and has the advantages of fast liquid absorption, good dryness, and good leak-proof effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. The parts of this utility model that are not described in detail are technologies known to those skilled in the art.

Claims

1. A dry and hygienic absorbent product, characterized in that: It includes a liquid-permeable surface layer, an absorbent layer, and a breathable bottom layer arranged sequentially from top to bottom; wherein, the liquid-permeable surface layer includes a first flow-guiding layer and a second flow-guiding layer arranged sequentially from top to bottom, the surface of the second flow-guiding layer is provided with a continuous wave structure extending along the width direction, the continuous wave structure is composed of alternating protrusions and depressions, and the continuous wave structure is symmetrical about left and right with respect to the center plane of the second flow-guiding layer in the width direction.

2. The dry and hygienic absorbent product according to claim 1, characterized in that, The second flow guiding layer is polyurethane foam.

3. The dry and hygienic absorbent product according to claim 1 or 2, characterized in that, The height of the protrusions increases continuously from the center of the liquid-permeable surface in the width direction to both sides.

4. The dry and hygienic absorbent product according to claim 3, characterized in that, The height of two adjacent protrusions increases by 0.2-0.4 mm.

5. The dry and hygienic absorbent product according to claim 1, characterized in that, The first flow guiding layer is a hot air nonwoven fabric or a spunbond nonwoven fabric, which contains occult blood fibers.

6. The dry and hygienic absorbent product according to claim 1 or 5, characterized in that, The protrusion and the recess are provided with at least one through hole.

7. The dry and hygienic absorbent product according to claim 6, characterized in that, The through-hole includes a first opening and a second opening connected vertically. From the liquid-permeable surface layer to the air-permeable bottom layer, the radial cross-sectional dimension of the first opening decreases continuously, while the radial cross-sectional dimension of the second opening increases continuously.

8. The dry and hygienic absorbent product according to claim 7, characterized in that, The maximum diameter of the first opening is greater than the maximum diameter of the second opening, and the minimum diameter of the second opening is the same as the minimum diameter of the first opening; and / or The maximum diameter of the first opening is 2-4 mm, and the maximum diameter of the second opening is 1-2 mm.

9. The dry and hygienic absorbent product according to claim 1, characterized in that, The absorbent layer is composed of at least one layer of wet-process superabsorbent resin paper wrapped around it.

10. The dry and hygienic absorbent product according to claim 1 or 9, characterized in that, The surface of the central region of the absorbent layer has several slits, the length of which is 3-8 mm.

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