Leakage-proof hygienic product
By designing a guide groove structure and a gradient-increasing absorption layer in sanitary products, the problems of side leakage and back leakage of sanitary products are solved, and rapid absorption, leakage prevention and comfort are achieved while reducing production costs.
Patent Information
- Application Number
- CN202422319283.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Existing sanitary products are inadequate in addressing side leakage and back leakage, and traditional methods may affect comfort or increase costs.
A leak-proof sanitary product is designed, comprising a skin-friendly surface layer, a diversion layer, and a liquid-impermeable bottom film. A diversion groove structure and a gradient-increasing absorption layer are provided in the middle. The diversion groove is used to accelerate liquid absorption, and a barrier layer is formed by the gradient expansion of a superabsorbent resin to prevent side leakage and rear leakage.
It achieves rapid absorption and diversion of liquids, prevents side leakage and back leakage, while maintaining comfort and breathability, reducing production costs and improving production efficiency.
Smart Images
Figure CN223473995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sanitary products technology, and in particular to a leak-proof sanitary product. Background Technology
[0002] Disposable diapers, sanitary napkins, and panty liners are common personal hygiene products, and these products are typically disposable. Currently, sanitary products on the market address side leakage primarily through methods such as 3D sidewalls, increased absorbent core loft, high-absorbency polymers (HEAP), or the inclusion of leak-proof raised structures. However, 3D sidewalls are prone to folding and losing their leak-proof function during exercise; increasing absorbent core loft can lead to poor dryness; increasing HEAP content raises the cost of sanitary napkins and can also increase the gel-clogging effect of HEAP after absorption, thus slowing down absorption; and adding leak-proof raised structures to the absorbent area reduces the comfort of the sanitary product. Utility Model Content
[0003] In view of one or more technical problems of the prior art, the present invention provides a leak-proof sanitary product. The sanitary product provided by the present invention can accelerate the seepage and absorption of liquid, has good breathability and dryness, and can effectively prevent side leakage and back leakage.
[0004] This utility model provides a leak-proof sanitary product, which includes a skin-friendly surface layer, a diversion layer, an absorbent layer and a liquid-impermeable bottom membrane arranged sequentially from top to bottom along the thickness direction;
[0005] The flow-guiding layer and the absorbent layer are located inside the suspension structure formed by the skin-friendly surface layer and the impermeable bottom membrane;
[0006] The absorbent layer is a single layer or multiple layers of superabsorbent resin absorbent paper, including multiple absorbent areas with the superabsorbent resin content increasing in a gradient from the center to the edge;
[0007] The sanitary product is provided with a channel structure that penetrates the skin-friendly surface layer, the flow-guiding layer, and the absorbent layer. The channel structure is located in the central area of the sanitary product and does not extend to the edge of the sanitary product. The channel structure includes a first channel distributed along the length direction in the central area of the sanitary product and multiple second channels connected to the first channel. The multiple second channels are symmetrically distributed along the first channel.
[0008] Preferably, the number of absorption regions is 2 to 10.
[0009] Preferably, the superabsorbent resin content in the absorbent layer is 1-50 wt%.
[0010] Preferably, the distance between the edge of the flow channel structure and the edge of the absorption layer is 10-20 mm.
[0011] Preferably, the shapes of the first guide groove and the second guide groove are independently one or more of the following: straight, wavy, and sawtooth.
[0012] Preferably, the second guide channel is perpendicular to the first guide channel.
[0013] Preferably, the first guide groove and the second guide groove are straight in shape.
[0014] Preferably, the width of the first guide channel is not less than the width of the second guide channel.
[0015] Preferably, the widths of the first guide groove and the second guide groove are each independently 0.5 to 10 mm.
[0016] Preferably, the skin-friendly surface layer is a fine denier hot-air nonwoven fabric;
[0017] The flow guiding layer is made of coarse denier hot-air nonwoven fabric, spunlace nonwoven fabric, or hot-air nonwoven fabric; and / or
[0018] The impermeable bottom membrane is a PE membrane.
[0019] Compared with the prior art, this utility model has at least the following advantages:
[0020] The suspended structure design of the sanitary product provided by this utility model allows the product to perfectly conform to the curves of the human body when not in contact with liquid, and maximizes the contact area when in contact with liquid. When liquid enters the absorbent layer from the central area, the superabsorbent resin in the ultra-thin absorbent layer absorbs the liquid and expands, activating the guiding effect of the channel. The multiple channel structures enable rapid liquid diversion, quickly guiding the liquid to the absorbent layer and accelerating absorption. The channel structure is located in the central area and does not extend to the edge of the sanitary product, forming a liquid-blocking area. The superabsorbent resin content in the absorbent layer increases gradually from the center to the edge. When a large amount of liquid is conducted along the channel structure to different absorption areas with varying superabsorbent resin content, it expands to different degrees. The expansion height near the edge is greater than that in the central area due to the higher superabsorbent resin content. Utilizing the height difference between the edge and central areas and the gel blocking effect of the superabsorbent resin, the liquid is effectively blocked, preventing it from crossing the outer edge of the sanitary product, thus preventing side and back leakage.
[0021] The sanitary products provided by this utility model have an absorbent layer made of super absorbent resin paper, which is ultra-thin, soft and instantly absorbent, enhancing the comfort and absorbency of the sanitary products and effectively reducing their thickness to obtain ultra-thin sanitary products. This simplifies the production process and improves production safety, resulting in faster and more efficient production.
[0022] The sanitary products provided by this utility model can accelerate liquid penetration and absorption, have good breathability and dryness, and can effectively prevent side leakage and back leakage. They are also characterized by being ultra-thin, having good softness and a close fit. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a cross-sectional view of the length direction of a leak-proof sanitary product provided by this utility model;
[0025] Figure 2 This utility model provides a cross-sectional schematic diagram of the width direction of a leak-proof sanitary product;
[0026] Figure 3 This utility model provides a schematic diagram of the structure of the absorbent layer in a leak-proof sanitary product;
[0027] Figure label:
[0028] 1-Skin-friendly surface layer; 2-Guiding layer; 3-Absorbing layer; 31-First absorption area; 32-Second absorption area; 33-Third absorption area; 34-Fourth absorption area; 4-Impermeable bottom membrane; 51-First guiding groove; 52-Second guiding groove. Detailed Implementation
[0029] 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 with reference to the 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 scope of protection of this utility model.
[0030] like Figure 1-3This utility model provides a leak-proof sanitary product, which includes a skin-friendly surface layer 1, a diversion layer 2, an absorbent layer 3 and an impermeable bottom membrane 4 arranged sequentially from top to bottom along the thickness direction;
[0031] The flow-guiding layer 2 and the absorption layer 3 are located inside the suspension structure formed by the skin-friendly surface layer 1 and the impermeable bottom membrane 4;
[0032] The absorbent layer 3 is a single or multiple layers of super absorbent resin paper, including multiple absorbent areas with the super absorbent resin content increasing in a gradient from the center to the edge.
[0033] The sanitary product is provided with a channel structure that runs through the skin-friendly surface layer 1, the flow guiding layer 2 and the absorbent layer 3. The channel structure includes a first channel 51 located in the central area of the sanitary product and distributed along the length direction, and multiple second channel 52 connected to the first channel 51. The multiple second channel 52 are symmetrically distributed along the first channel 51.
[0034] In this utility model Figure 1-2 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.
[0035] The suspended structure design of the sanitary product provided by this utility model allows the product to perfectly conform to the curves of the human body when not in contact with liquid, and maximizes the contact area when in contact with liquid. When liquid enters the absorbent layer from the central area, the superabsorbent resin in the ultra-thin absorbent layer absorbs the liquid and expands, activating the guiding effect of the channel. The multiple channel structures enable rapid liquid diversion, quickly guiding the liquid to the absorbent layer and accelerating absorption. The channel structure is located in the central area and does not extend to the edge of the sanitary product, forming a liquid-blocking area. The superabsorbent resin content in the absorbent layer increases gradually from the center to the edge. When a large amount of liquid is conducted along the channel structure to different absorption areas with varying superabsorbent resin content, it expands to different degrees. The expansion height near the edge is greater than that in the central area due to the higher superabsorbent resin content. Utilizing the height difference between the edge and central areas and the gel blocking effect of the superabsorbent resin, the liquid is effectively blocked, preventing it from crossing the outer edge of the sanitary product, thus preventing side and back leakage.
[0036] The sanitary products provided by this utility model have an absorbent layer made of super absorbent resin paper, which is ultra-thin, soft and instantly absorbent, enhancing the comfort and absorbency of the sanitary products and effectively reducing their thickness to obtain ultra-thin sanitary products. This simplifies the production process and improves production safety, resulting in faster and more efficient production.
[0037] The sanitary products provided by this utility model can accelerate liquid penetration and absorption, have good breathability and dryness, and can effectively prevent side leakage and back leakage. They are also characterized by being ultra-thin, having good softness and a close fit.
[0038] According to some preferred embodiments, the number of absorbent regions is 2 to 10. The specific number of absorbent regions in this invention is adjusted according to the size of the sanitary product. The longer the absorbent layer in the sanitary product, the more absorbent regions there are (the more gradient levels of superabsorbent polymer content). For example, an absorbent layer with a length of 245 mm has 2 to 5 gradient levels (corresponding to 2 to 5 absorbent regions), an absorbent layer with a length of 290 mm has 2 to 7 gradient levels, an absorbent layer with a length of 360 mm has 2 to 8 gradient levels, and an absorbent layer with a length of 420 mm has 2 to 8 gradient levels; the polymer content of each absorbent region can be adjusted according to the specific gradient levels. For example, when the gradient level of the absorbent layer is 3 levels, the content of superabsorbent polymer (SAP) in each absorption region from the center to the edge is 1-20%, 20-30%, and 30-50%, respectively; if the gradient level of the absorbent layer is 4 levels, the content of SAP in each absorption region from the center to the edge is 1-10%, 10-20%, 20-30%, and 30-50%, respectively. If the gradient level of the absorbent layer is 4 levels, the content of SAP in each absorption region from the center to the edge is 10-15%, 15-20%, 20-25%, 25-30%, and 30-50%, respectively.
[0039] According to some preferred embodiments, the superabsorbent resin content in the absorbent layer 3 is 1-50 wt%.
[0040] According to some preferred embodiments, the distance between the edge of the flow guide structure and the edge of the absorbent layer is 10-20 mm. The distance between the edge of the flow guide structure and the edge of the absorbent layer forms a liquid-blocking region, which prevents the liquid guided by the flow guide structure from flowing directly to the edge, effectively preventing side leakage.
[0041] According to some preferred embodiments, the shapes of the first guide groove 51 and the second guide groove 52 are independently one or more of the following: straight, wavy, and sawtooth.
[0042] According to some preferred embodiments, the second guide channel 52 is perpendicular to the first guide channel 51. The perpendicular distribution of the second guide channel to the first guide channel can accelerate the flow of liquid.
[0043] According to some preferred embodiments, the first guide channel 51 and the second guide channel 52 are straight in shape. Using straight guide channels provides better flow guidance.
[0044] According to some preferred embodiments, the width of the first guide groove 51 is not less than the width of the second guide groove 52.
[0045] According to some preferred embodiments, the widths of the first guide groove 51 and the second guide groove 52 are each independently 0.5 to 10 mm.
[0046] According to some preferred embodiments, the skin-friendly surface layer 1 is a fine denier hot-air nonwoven fabric; and / or
[0047] The flow guiding layer 2 is made of coarse denier hot air nonwoven fabric, spunlace nonwoven fabric or hot air nonwoven fabric.
[0048] The impermeable bottom membrane 4 is a PE membrane.
[0049] like Figure 1-3 As shown in a specific embodiment of this utility model, a leak-proof sanitary product includes a skin-friendly surface layer 1, a diversion layer 2, an absorbent layer 3, and a liquid-impermeable bottom membrane 4 arranged sequentially from top to bottom along the thickness direction. The diversion layer 2 and the absorbent layer 3 are located inside the suspension structure formed by the skin-friendly surface layer 1 and the liquid-impermeable bottom membrane 4. The absorbent layer 3 is a single layer or multiple layers of super absorbent resin paper, including a first absorbent region 31, a second absorbent region 32, a third absorbent region 33, and a fourth absorbent region 34 with the super absorbent resin content increasing in a gradient from the center to the edge. A diversion channel structure penetrating the skin-friendly surface layer 1, the diversion layer 2, and the absorbent layer 3 is provided in the central region of the sanitary product. The diversion channel structure is located in the central region of the sanitary product and does not extend to the edge of the sanitary product (there is a distance between the edge of the diversion channel structure and the edge of the absorbent layer 3). The diversion channel structure includes a first diversion channel 51 distributed along the length direction in the central part of the sanitary product and multiple second diversion channels 52 distributed perpendicularly to the first diversion channel 51. The multiple second diversion channels 52 are symmetrically distributed along the first diversion channel 51. The width of the first guide channel 51 is greater than the width of the second guide channel 52; the skin-friendly surface layer 1 is made of fine denier hot air nonwoven fabric, the guide layer 2 is made of coarse denier hot air nonwoven fabric, and the liquid-impermeable bottom membrane 4 is a PE membrane.
[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0051] 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. Such 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.
Claims
1. A leak-proof sanitary product, characterized in that, The hygiene product comprises, from top to bottom, a skin-friendly surface layer, a diversion layer, an absorbent layer, and a liquid-impermeable bottom membrane, arranged sequentially along the thickness direction; The flow-guiding layer and the absorbent layer are located inside the suspension structure formed by the skin-friendly surface layer and the impermeable bottom membrane; The absorbent layer is a single layer or multiple layers of superabsorbent resin absorbent paper, including multiple absorbent areas with the superabsorbent resin content increasing in a gradient from the center to the edge; The sanitary product is provided with a channel structure that penetrates the skin-friendly surface layer, the flow-guiding layer, and the absorbent layer. The channel structure is located in the central area of the sanitary product and does not extend to the edge of the sanitary product. The channel structure includes a first channel distributed along the length direction in the central area of the sanitary product and multiple second channels connected to the first channel. The multiple second channels are symmetrically distributed along the first channel.
2. The sanitary product according to claim 1, characterized in that, The number of absorption regions is 2 to 10.
3. The sanitary product according to claim 1, characterized in that, The absorbent layer contains 1-50 wt% superabsorbent resin.
4. The sanitary product according to claim 1, characterized in that, The distance between the edge of the flow channel structure and the edge of the absorption layer is 10~20mm.
5. The sanitary product according to claim 1, characterized in that, The shapes of the first guide groove and the second guide groove are independently one or more of the following: straight, wavy, and sawtooth.
6. The sanitary product according to claim 1, characterized in that, The second guide channel is perpendicular to the first guide channel.
7. The sanitary product according to claim 6, characterized in that, The first guide channel and the second guide channel are straight in shape.
8. The sanitary product according to claim 5, characterized in that, The width of the first guide channel is not less than the width of the second guide channel.
9. The sanitary product according to claim 6, characterized in that, The widths of the first and second guide channels are independently 0.5 to 10 mm.
10. The sanitary product according to claim 1, characterized in that, The skin-friendly surface layer is made of fine denier hot-air nonwoven fabric; The flow guiding layer is made of coarse denier hot-air nonwoven fabric, spunlace nonwoven fabric, or hot-air nonwoven fabric; and / or The impermeable bottom membrane is a PE membrane.