Anti-stick sanitary absorbent article

Abstract

This invention provides a non-sticky absorbent sanitary product, comprising, from top to bottom, a liquid-permeable surface layer, a moisture-proof layer, an absorbent layer, and a breathable bottom layer. The moisture-proof layer is made of perforated PE nonwoven fabric, with the edges folded to create a concave structure. The absorbent layer comprises, from top to bottom, a leak-proof absorbent layer and a main absorbent layer. By placing a moisture-proof layer between the liquid-permeable surface layer and the absorbent layer, this structure not only facilitates the rapid conduction of liquid from the liquid-permeable surface layer to the lower absorbent layer but also effectively prevents backflow of liquid to the liquid-permeable surface layer, thus ensuring the dryness of the liquid-permeable surface layer. Furthermore, by setting up the leak-proof absorbent layer and the main absorbent layer, the two work together to further ensure a good liquid absorption speed for the sanitary absorbent product and effectively prevent leakage. Therefore, the sanitary absorbent product of this invention combines the properties of a dry surface, fast absorption speed, high absorbency, and leak-proof performance.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, and in particular to an anti-sticky absorbent hygiene product. Background Technology

[0002] 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.

[0003] Therefore, there is an urgent need for a non-sticky absorbent product that combines rapid absorption with a dry and comfortable feel. Summary of the Invention

[0004] This invention provides a non-sticky hygienic absorbent product with the advantages of fast absorption and dry, comfortable feel.

[0005] To achieve the above objectives, in a first aspect, this utility model provides a non-sticky sanitary absorbent product, comprising a liquid-permeable surface layer, a moisture-proof layer, an absorbent layer, and a breathable bottom layer arranged sequentially from top to bottom; wherein, the moisture-proof layer is composed of PE perforated nonwoven fabric, the edges of which are folded to make the moisture-proof layer have a concave structure, and the absorbent layer comprises a leak-proof absorbent layer and a main absorbent layer arranged sequentially from top to bottom.

[0006] Preferably, the PE perforated nonwoven fabric has at least one of the following pore shapes: circular, elliptical, square, or heart-shaped, with a pore diameter of 3-5 mm.

[0007] Preferably, the liquid-permeable surface layer is a double-carded nonwoven fabric, which is composed of an upper layer of fibers and a lower layer of fibers; wherein the pores between the drawing nodes of the upper layer fibers are larger than the pores between the drawing nodes of the lower layer fibers.

[0008] Preferably, the liquid-permeable surface layer is a double-carded hot-air nonwoven fabric.

[0009] Preferably, the leak-proof absorbent layer is polyurethane foam, and the main absorbent layer is composed of at least one layer of wet-process superabsorbent resin paper wrapped with wet-process superabsorbent resin paper.

[0010] Preferably, the surface of the leak-proof absorption layer in the width direction is provided with alternating protrusions and recesses, and the protrusions and recesses are symmetrical about the center plane of the leak-proof absorption layer in the width direction.

[0011] Preferably, the height of the protrusion increases continuously from the center of the leak-proof absorbent layer in the width direction to both sides.

[0012] More preferably, the increase in the height of two adjacent protrusions is 0.2-0.4 mm.

[0013] Preferably, the protrusion and the recess are provided with at least one through hole.

[0014] Preferably, the through hole includes a first opening and a second opening connected vertically, with the radial cross-sectional dimension of the first opening continuously decreasing and the radial cross-sectional dimension of the second opening continuously increasing from the liquid-permeable surface layer to the air-permeable bottom layer.

[0015] 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.

[0016] Preferably, the surface of the central region of the main absorbent layer is provided with 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, a moisture-proof layer is provided between the liquid-permeable surface layer and the absorbent layer. This layer is made of PE perforated non-woven fabric, and the edges are folded to create a concave structure. This structure not only facilitates the rapid conduction of liquid from the liquid-permeable surface layer to the lower absorbent layer but also effectively prevents liquid from seeping back into the liquid-permeable surface layer, thus ensuring the dryness of the liquid-permeable surface layer. Furthermore, by providing a leak-proof absorbent layer and a main absorbent layer, the two work together to further ensure a good liquid absorption speed for the sanitary absorbent product and effectively prevent leakage. Thus, the sanitary absorbent product of this invention combines the properties of a dry surface, fast absorption speed, high absorbency, and leak-proofness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an anti-stick sanitary absorbent product provided by this utility model; Figure 2 This is a schematic diagram of the structure of the leak-proof absorbent layer in an anti-stick sanitary absorbent product provided by this utility model; In the diagram: 100: liquid-permeable surface layer; 200: moisture-proof layer; 300: absorbent layer; 400: breathable bottom layer; 301: leak-proof absorbent layer; 302: main absorbent layer; 3011: protrusion; 3012: recess; 303: through hole; 3031: first opening; 3032: second opening. 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 non-sticky hygienic absorbent product, such as... Figure 1 As shown, it includes a liquid-permeable surface layer 100, a moisture-proof layer 200, an absorbent layer 300, and a breathable bottom layer 400 arranged sequentially from top to bottom; wherein, the moisture-proof layer 200 is made of PE perforated non-woven fabric, and the edges of the PE perforated non-woven fabric are folded to make the moisture-proof layer 200 have a concave structure; the absorbent layer 300 includes a leak-proof absorbent layer 301 and a main absorbent layer 302 arranged sequentially from top to bottom.

[0021] In this utility model, such as Figure 1 As shown, by setting a moisture barrier layer 200 between the liquid-permeable surface layer 100 and the absorbent layer 300, this layer is made of PE perforated non-woven fabric, and the edges are folded to make the moisture barrier layer 200 have a concave structure. This structure not only facilitates the rapid conduction of liquid from the liquid-permeable surface layer 100 to the lower absorbent layer, but also effectively prevents the backflow of liquid to the liquid-permeable surface layer 100, thereby ensuring the dryness of the liquid-permeable surface layer 100. Furthermore, by setting a leak-proof absorbent layer 301 and a main absorbent layer 302, the two work together to further ensure a good liquid absorption speed of the sanitary absorbent product and effectively prevent leakage. Thus, the sanitary absorbent product of this utility model has the properties of a dry surface, fast absorption speed, high absorbency, and leak-proofness.

[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 pore shape of the PE perforated nonwoven fabric is at least one of circular, elliptical, square or heart-shaped, and the pore diameter is 3-5mm (for example, it can be 3mm, 4mm or 5mm).

[0024] In this invention, PE perforated nonwoven fabric is used as the moisture barrier layer 200. This nonwoven fabric has good breathability and softness, and can effectively isolate moisture and expel heat and humidity. It is placed below the liquid-permeable surface and the edges are folded to make the nonwoven fabric have a concave flow-guiding structure with raised edges and a concave center. When a large amount of liquid seeps from the liquid-permeable surface layer 100 to the moisture barrier layer 200, this structure can quickly guide the liquid to the absorbent layer 300, thereby ensuring good comfort and dryness of the liquid-permeable surface layer 100.

[0025] According to some preferred embodiments, the liquid-permeable surface layer 100 is a double-carded nonwoven fabric, which is composed of an upper layer of fibers and a lower layer of fibers; wherein the pores between the drawing nodes of the upper layer fibers are larger than the pores between the drawing nodes of the lower layer fibers.

[0026] According to some preferred embodiments, the liquid-permeable surface layer 100 is a double-carded hot-air nonwoven fabric.

[0027] In this invention, the liquid-permeable surface layer 100 is made of a double-carded nonwoven fabric, which consists of an upper layer of fibers and a lower layer of fibers. The upper layer of fibers (the layer that directly contacts the skin) has large pores, allowing liquid to penetrate quickly, thereby greatly reducing the contact time between the liquid and the skin and reducing the feeling of dampness and stuffiness. When the liquid seeps down to the lower layer of fibers, strong capillary force will quickly spread the liquid laterally, making the liquid evenly distributed across the entire surface area of ​​the liquid-permeable surface layer 100. Furthermore, when pressure is applied, this structure can effectively prevent backflow into the liquid-permeable surface layer 100, thus maintaining the dryness and comfort of the liquid-permeable surface layer 100 in contact with the skin.

[0028] According to some preferred embodiments, the leak-proof absorbent layer 301 is polyurethane foam, and the main absorbent layer 302 is composed of at least one layer of wet-process superabsorbent resin paper wrapped with wet-process superabsorbent resin paper.

[0029] In this invention, hydrophilic polyurethane foam is used as the leak-proof absorbent layer 301, which has good support and liquid absorption properties. Multilayer superabsorbent resin composite paper is used as the main absorbent layer 302, which has good liquid absorption and liquid retention properties. The two layers work together to ensure the excellent liquid absorption performance of the absorbent layer 300.

[0030] In this invention, the thickness of the polyurethane foam is 2-4 mm, and the basis weight of the superabsorbent resin paper in the main absorbent layer 302 is 30-300 g / m². 2 Preferably 70~150g / m 2 .

[0031] like Figure 2As shown, according to some preferred embodiments, the surface of the leak-proof absorption layer 301 in the width direction is provided with alternating protrusions 3011 and recesses 3012, and the protrusions 3011 and recesses 3012 are symmetrical about the center plane of the leak-proof absorption layer 301 in the width direction.

[0032] According to some preferred embodiments, the protrusion height of the protrusion 3011 increases continuously from the center of the leak-proof absorption layer 301 in the width direction to both sides; the increase in the protrusion height of two adjacent protrusions 3011 is 0.2-0.4 mm (for example, it can be 0.2 mm, 0.3 mm or 0.4 mm).

[0033] In this invention, by setting several alternating protrusions 3011 and recesses 3012 along the width direction of the polyurethane foam, the liquid absorption speed of the polyurethane foam can be enhanced. Furthermore, the protrusions 3011 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 guide channel to guide the liquid to permeate into the main absorbent layer 302, thereby ensuring the good liquid absorption performance of the absorbent layer 300. 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.

[0034] 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.

[0035] like Figure 2 As shown, according to some preferred embodiments, the protrusion 3011 and the recess 3012 are provided with at least one through hole 303.

[0036] According to some preferred embodiments, the through hole 303 includes a first opening 3031 and a second opening 3032 connected vertically, extending from the liquid-permeable surface layer 100 to the air-permeable bottom layer 400. The radial cross-sectional dimension of the first opening 3031 decreases continuously, while the radial cross-sectional dimension of the second opening 3032 increases continuously.

[0037] In this invention, by providing through holes 303 in each recessed portion 3012 and protruding portion 3011, the liquid absorption speed of the absorbent layer 300 can be enhanced. Furthermore, the cross-sectional dimensions of the first opening 3031 continuously decrease to form a positive funnel shape, and the radial cross-sectional dimensions of the second opening 3032 continuously increase to form an inverted funnel shape, so that the entire through hole 303 has an hourglass-shaped structure. When liquid seeps down, the protruding structure guides the liquid to flow longitudinally, avoiding the edge leak-proof area. Moreover, the first opening 3031 on the surface of the protruding portion 3011 and the recessed portion 3012 can reduce surface tension resistance, quickly capture the liquid, and accelerate the rapid seepage of the liquid to the absorbent layer 300 for absorption through the second opening 3032. It can also effectively prevent the back seepage of the liquid. At the same time, the through hole 303 is not easy to collapse when the structure is under pressure.

[0038] According to some preferred embodiments, the maximum aperture of the first opening 3031 is greater than the maximum aperture of the second opening 3032, and the minimum aperture of the second opening 3032 is the same as the minimum aperture of the first opening 3031.

[0039] In this invention, the maximum pore size of the first opening 3031 is larger than the maximum pore size of the second opening 3032, and the minimum pore size (i.e. the contact position) of the two is 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 300 for absorption, and effectively preventing the backflow of the liquid.

[0040] According to some preferred embodiments, the surface of the central region of the main absorbent layer is provided with a plurality of slits, the length of which is 3-8 mm (for example, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm).

[0041] In this invention, the absorbent layer is made of wet-process superabsorbent resin absorbent paper. This material can absorb and retain liquid in the first instance, ensuring the dryness of the surface. By setting several slits on the surface of at least one layer of superabsorbent resin, the slits can promote the liquid to preferentially penetrate along the longitudinal direction of the slits 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.

[0042] It should be noted that the shape and spacing of the slits are not specifically limited in this utility model, and can be selected according to actual needs, such as being long strips or wavy shapes.

[0043] According to some preferred embodiments, the breathable bottom layer is a PE breathable membrane.

[0044] 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.

[0045] 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.

[0046] Example 1 A non-sticky absorbent sanitary product includes, from top to bottom, a liquid-permeable top layer (double-carded spunbond nonwoven fabric, where the pore size between the fiber drawing nodes of the upper layer is larger than that of the lower layer), a moisture-proof layer, an absorbent layer, and a breathable bottom layer (PE breathable membrane). The moisture-proof layer is composed of perforated PE nonwoven fabric (circular, 3mm pore size), with the edges folded to create a concave structure. The absorbent layer includes, from top to bottom, a leak-proof absorbent layer (polyurethane foam, 2mm thick) and a main absorbent layer (one layer of wet-laid superabsorbent resin paper wrapped around two layers of wet-laid superabsorbent resin paper, 150g / m²). 2 The polyurethane foam has alternating protrusions and recesses on its width-direction surface. The protrusions and recesses are symmetrical about the center plane of the leak-proof absorbent layer in the width direction. From the center plane of the leak-proof absorbent layer in the width direction to the two side edges, the height of the protrusions increases continuously. The increase in height between two adjacent protrusions is 0.3 mm. Each protrusion and each recess 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 pore diameter of the first opening is 2 mm and the minimum pore diameter is 1 mm. The maximum pore diameter of the second opening is 1.5 mm and the minimum pore diameter is 1 mm. The central area of ​​each layer of wet-process super absorbent resin paper has three slits, each slit being 6 mm long.

[0047] 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.

[0048] Example 3 Example 3 is basically the same as Example 1, except that in the polyurethane foam, the height of the protrusions is the same from the center of the leak-proof absorption layer in the width direction to both sides of the edge.

[0049] Example 4 Example 4 is basically the same as Example 1, except that no moisture barrier is provided.

[0050] 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.

[0051] In this invention, the performance of the anti-stick sanitary absorbent products in Examples 1 to 4 and Comparative Example 1 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.

[0052] 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.

[0053] 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 non-sticky absorbent hygiene product, characterized in that: It includes a liquid-permeable surface layer, a moisture-proof layer, an absorbent layer, and a breathable bottom layer arranged from top to bottom; wherein, the moisture-proof layer is made of PE perforated non-woven fabric, and the edges of the PE perforated non-woven fabric are folded to make the moisture-proof layer have a concave structure; the absorbent layer includes a leak-proof absorbent layer and a main absorbent layer arranged from top to bottom.

2. The non-sticky absorbent sanitary product according to claim 1, characterized in that, The PE perforated nonwoven fabric has at least one of the following hole shapes: round, elliptical, square, or heart-shaped, with a hole diameter of 3-5 mm.

3. The non-sticky absorbent sanitary product according to claim 1, characterized in that, The liquid-permeable surface layer is a double-carded nonwoven fabric, which is composed of an upper layer of fibers and a lower layer of fibers; wherein the pores between the drawing nodes of the upper layer fibers are larger than the pores between the drawing nodes of the lower layer fibers.

4. The non-sticky absorbent sanitary product according to claim 3, characterized in that, The liquid-permeable surface layer is a double-carded hot-air nonwoven fabric.

5. The non-sticky absorbent sanitary product according to claim 1, characterized in that, The leak-proof absorbent layer is polyurethane foam, and the main absorbent layer is composed of at least one layer of wet-process super absorbent resin paper wrapped around it.

6. The non-sticky absorbent sanitary product according to claim 5, characterized in that, The surface of the leak-proof absorption layer in the width direction is provided with alternating protrusions and depressions, and the protrusions and depressions are symmetrical about the center plane of the leak-proof absorption layer in the width direction.

7. The non-sticky absorbent sanitary product according to claim 6, characterized in that, The height of the protrusions increases continuously from the center of the leak-proof absorbent layer along its width towards both sides; and / or The increase in the height of two adjacent protrusions is 0.2-0.4 mm.

8. The non-stick sanitary absorbent product according to claim 6 or 7, characterized in that, The protrusion and the recess are provided with at least one through hole.

9. The non-sticky absorbent sanitary product according to claim 8, characterized in that, The through hole includes a first opening and a second opening. 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. and / or 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.

10. The non-sticky absorbent sanitary product according to claim 5, characterized in that, The surface of the central region of the main absorbent layer has several slits, the length of which is 3-8 mm.

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