Dry and comfortable high-water-absorption paper diaper
By using a composite surface structure of pure cotton high-count gauze and pure cotton non-woven fabric in the diaper, combined with hydrophobic treatment and density difference diversion layer, it can quickly absorb and lock in liquid, solving the problem that diapers cannot keep skin dry for a long time, and improving the comfort and safety of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN PURCOTTON TECH
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-15
AI Technical Summary
Existing disposable diapers cannot maintain a skin-friendly and dry state for a long time. The synthetic fiber surface layer is not very comfortable and is not environmentally friendly, while the cotton fiber surface layer has poor moisture absorption.
It adopts a composite surface structure with pure cotton high-count yarn as the outer layer and pure cotton non-woven fabric as the inner layer. The inner layer surface is hydrophobic, the diversion layer has a grid structure with different density, and the absorbent core layer includes a fast absorption layer and a water-locking layer. It uses Velcro to connect the elastic waistband.
It improves user comfort, enables rapid liquid absorption and keeps the surface dry, reduces the possibility of liquid backflow, and enhances breathability and safety.
Smart Images
Figure CN224235668U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of diaper technology, and in particular to dry and highly absorbent diapers. Background Technology
[0002] Disposable diapers are a common daily necessity for babies and also a type of adult care product. They are mainly used to absorb urine, and the comfort of their surface layer directly affects the user's experience.
[0003] Currently, the vast majority of diapers on the market have a synthetic fiber surface layer. The main advantages of synthetic fiber surface layers are that they are dry, absorb quickly, and are low in cost. However, synthetic fiber surface layers are not skin-friendly and their comfort level is generally low. Moreover, synthetic fibers are made from petroleum derivatives, and the production process is complex and has a certain impact on the environment, which does not conform to the concept of environmental friendliness. While existing cotton fiber surface layers are skin-friendly, their moisture-absorbing properties cannot provide a dry surface environment.
[0004] In view of this, the purpose of this utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a dry and highly absorbent diaper, which solves the problem that existing diapers cannot maintain a skin-friendly and dry state for a long time.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A dry, highly absorbent diaper includes a diaper body and elastic front waistbands and elastic back waistbands connected to both ends of the diaper body. The elastic front waistbands and elastic back waistbands are detachably connected. The diaper body is provided with a top layer, a flow-guiding layer, an absorbent core layer, and a bottom film from top to bottom. The top layer includes a surface layer and an inner layer. The surface layer is in direct contact with the skin, and the inner layer is attached to the surface layer. The inner layer has a hydrophobic surface on the side facing the flow-guiding layer.
[0008] In the above structure, the outer layer has a mesh-like micro-convex structure on the side facing away from the inner layer.
[0009] In the above structure, the outer layer is a pure cotton high-count yarn layer, and the inner layer is a pure cotton non-woven fabric layer.
[0010] In the above structure, the flow guiding layer has a flow guiding mesh structure, and the density of the flow guiding mesh structure is less on the side closer to the surface layer than on the side farther away from the surface layer.
[0011] In the above structure, the absorbent core layer includes a fast absorption layer and a water-locking layer. The fast absorption layer is disposed near the flow guiding layer, and the water-locking layer is disposed near the bottom membrane. The fast absorption layer is used to quickly absorb liquid, and the water-locking layer is used to adsorb and lock liquid.
[0012] In the above structure, the fast-absorbing layer includes a hot-air nonwoven fabric layer with a porous fiber mesh structure, wherein fluff pulp and superabsorbent resin are uniformly mixed in the hot-air nonwoven fabric layer.
[0013] In the above structure, the water-locking layer includes a bamboo charcoal fiber layer, and superabsorbent resin particles are disposed within the bamboo charcoal fiber layer.
[0014] In the above structure, the elastic front waist is provided with Velcro on both sides, and the elastic back waist is provided with Velcro strips that are compatible with and can be adhered to the Velcro.
[0015] The beneficial effects of this utility model are as follows: The dry and highly absorbent diaper of this application has a composite surface layer structure. By setting a skin-friendly surface layer that comes into direct contact with the user's skin, the comfort of use is improved. In addition, the inner layer with a hydrophobic surface allows liquid to be quickly introduced into the absorbent core after passing through the surface layer, achieving the effect of rapid liquid absorption and keeping the surface layer dry. At the same time, due to the setting of the hydrophobic surface, while achieving efficient instant absorption, the possibility of liquid backflow is effectively reduced, further ensuring the dryness of the surface layer. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic cross-sectional view of the main body of the diaper of this utility model;
[0019] Figure 3 This is a schematic diagram of the surface layer structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the flow guide layer structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the absorber core structure of this utility model.
[0022] Figure reference numerals: 1. Diaper body; 11. Top layer; 111. Surface layer; 112. Inner layer; 12. Diverting layer; 121. Top layer; 122. Bottom layer; 13. Absorbent core layer; 131. Quick-absorbing layer; 132. Water-locking layer; 14. Bottom film; 2. Elastic front waistband; 21. Velcro strap; 3. Elastic back waistband; 31. Velcro strap. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described below.
[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.
[0025] Reference Figures 1 to 5 This utility model provides a dry, highly absorbent diaper, comprising a diaper body 1 and elastic front waistbands 2 and elastic back waistbands 3 connected to both ends of the diaper body 1. The elastic front waistbands 2 and elastic back waistbands 3 are detachably connected. The diaper body 1 primarily absorbs urine, while the elastic front waistbands 2 and elastic back waistbands 3 work together to facilitate the user's putting on and taking off of the diaper. The diaper body 1 includes, from top to bottom, a top layer 11, a distribution layer 12, an absorbent core layer 13, and a bottom film 14. The top layer 11 directly contacts the user's skin; the distribution layer 12 is attached to the top layer 11 to conduct liquid flowing through the top layer 11 to the absorbent core layer 13; the absorbent core layer 13 is attached to the distribution layer 12 and primarily absorbs and locks in urine. The bottom film 14 is a waterproof and breathable membrane, which ensures that urine cannot penetrate the diaper while maintaining ventilation and breathability, further enhancing the diaper's breathability and comfort, and ensuring its practicality and safety.
[0026] Reference Figure 2 and Figure 3Furthermore, the surface layer 11 includes a top layer 111 and an inner layer 112, wherein the top layer 111 is disposed on the side of the surface layer 11 that directly contacts the skin; the inner layer 112 is attached to the top layer 111 and disposed on the side of the surface layer 11 facing the guide layer 12. The surface of the inner layer 112 facing the guide layer 12 is configured as a hydrophobic surface. The side of the inner layer 112 that is attached to the guide layer 12 is treated with hydrophobic modification, so that the inner layer 112 forms a "hydrophilic inside, hydrophobic outside" structure, that is, liquid that permeates from the top layer 111 can quickly permeate downward from the inner layer 112, which can reduce the lateral diffusion of liquid in the surface layer 11 and help keep the surface layer 11 dry; due to the hydrophobic treatment of the surface of the inner layer 112, liquid cannot seep back from the guide layer 12 to the surface layer 11, further ensuring that the surface layer 11 can keep dry. In this embodiment, the width of the surface layer 11 is set to 17-18 cm.
[0027] Furthermore, the outer layer 111 has a mesh-like micro-convex structure on the side facing away from the inner layer 112. By designing the side of the outer layer 111 that directly contacts the skin as a surface with a micro-convex structure, the contact area between the outer layer 111 and the skin can be effectively reduced, ensuring breathability and improving user comfort. In this embodiment, the mesh-like micro-convex structure is formed using ultra-fine pure cotton fibers through spinning and weaving technology.
[0028] Furthermore, the outer layer 111 is a high-count pure cotton gauze layer, and the inner layer 112 is a pure cotton non-woven fabric layer. The outer layer 111 and the inner layer 112 are bonded together with hot melt adhesive to form the surface layer 11. The outer layer 111 is made of high-count pure cotton gauze, specifically 40-60 count gauze. The porous structure of the gauze facilitates rapid liquid penetration, keeping the surface layer 111 dry. Simultaneously, using pure cotton material for the surface layer 11 utilizes the hygroscopic properties of natural cotton fibers to initially absorb liquid, further aiding in rapid liquid penetration. Additionally, using high-count gauze avoids the problem of coarse fibers in the surface layer 111 causing a rough feel, thus improving user comfort. In this embodiment, the warp and weft density of the high-count pure cotton gauze is set to 80-120 threads / inch, and the weight is 30-50 g / m². 2 To ensure softness while avoiding structural loosening and deformation after liquid absorption, the high-count gauze layer is edged with a denser overlocking process (such as double-needle fine stitching) to prevent loose fibers from causing side leakage. In this embodiment, the inner layer 112 uses a 30-50g / m² gauze. 2 Pure cotton nonwoven fabric with a weight of grammage.
[0029] Reference Figure 2 and Figure 4The flow-guiding layer 12 is used to conduct the liquid flowing through the surface layer 11 to the absorbent core layer 13. Specifically, the flow-guiding layer 12 has a flow-guiding mesh structure, and the density of this flow-guiding mesh structure is less on the side closer to the surface layer 11 (i.e., the upper layer 121) than on the side farther from the surface layer 11 (i.e., the lower layer 122). That is, the flow-guiding layer 12 forms an inverted triangular channel with a sparse upper section and a dense lower section. This arrangement helps to guide the liquid to quickly seep down into the absorbent core layer 13 along the density difference, which can reduce the residence time of the liquid in the surface layer 11 and the flow-guiding layer 12, and further ensure that the surface layer 11 remains dry. In addition, the sparse upper section and dense lower section structure can also effectively prevent liquid backflow.
[0030] In this embodiment, the flow guiding layer 12 is made of coarse denier fiber with a density of 12-24D, and the lower layer 122 is made of fine denier fiber with a density of 6-10D. The flow guiding layer 12 structure with density difference is formed by hot air puncture. The thickness of the flow guiding layer 12 is controlled between 1.0-3.0mm.
[0031] Reference Figure 2 and Figure 5 The absorbent core layer 13 is used to absorb moisture and lock in liquid. Specifically, the absorbent core layer 13 includes a fast-absorbing layer 131 and a water-locking layer 132 that are attached to each other. The fast-absorbing layer 131 is disposed on the side close to the flow guiding layer 12, and the water-locking layer 132 is disposed on the side close to the bottom membrane 14. The fast-absorbing layer 131 is used to quickly absorb liquid, and the water-locking layer 132 is used to adsorb and lock in liquid.
[0032] In this embodiment, the rapid absorption layer 131 includes a hot-air nonwoven fabric with a porous fiber mesh structure, in which fluff pulp and superabsorbent resin are mixed and disposed. Specifically, the fluff pulp and superabsorbent resin are uniformly mixed and disposed in the fiber mesh of the hot-air nonwoven fabric. The fluff pulp in the absorbent core layer 13 acts as a guide for liquid flow, while the superabsorbent resin serves to lock in some of the liquid. The hot-air nonwoven fabric acts as a carrier for the fluff pulp and superabsorbent resin, fixing them in place and effectively reducing the possibility of discontinuity in the rapid absorption layer 131.
[0033] The water-locking layer 132 includes a bamboo charcoal fiber layer, and super absorbent resin is disposed in the bamboo charcoal fiber layer. By mixing super absorbent resin particles into the bamboo charcoal fiber layer to form the water-locking layer 132, a gel water-locking barrier is formed while adsorbing odors, further reducing the possibility of liquid backflow.
[0034] Reference Figure 1 Furthermore, the elastic front waistband 2 is provided with Velcro 21 on both sides, and the elastic back waistband 3 is provided with Velcro 31 that is compatible with and can be glued to the Velcro 21. The Velcro 31 cooperates with the Velcro 21 to realize the detachable connection between the elastic front waistband 2 and the elastic back waistband 3.
[0035] In this embodiment, the adjacent layers of the surface layer 11, the flow guiding layer 12, the absorbent core layer, and the bottom film 14 are all adhered and bonded together by hot melt adhesive.
[0036] The performance of the dry and highly absorbent diaper of this utility model was tested, and the test results are shown in Table 1. The test conditions were 23±1℃ and 50±5%RH. The control group product was a conventional composite core diaper. The absorption rate, rewetting amount, and permeability were measured according to GB / T28004.1-2021 standard, and the slippage amount was measured according to GB / T28004-2011 standard.
[0037] Table 1
[0038]
[0039] As shown in Table 1, the dry and highly absorbent diapers of this invention have significantly lower absorption speed, rewetting amount, permeation amount, and slippage amount than the control group, demonstrating the advantages of good absorption rate and low rewetting amount.
[0040] In this embodiment, the production process of the dry, highly absorbent diaper is as follows:
[0041] Step 1, Preparation of surface layer 11:
[0042] a) Preparation of the surface layer 111: Select 40-60 count high-count yarn, with a warp and weft density of 80-120 threads / inch and a weight of 30-50 g / m². 2 The edges of the high-count yarn layer are sealed using a high-density overlocking process (such as double-needle fine stitching) to achieve a high air permeability (g / m²). 2 High-count gauze layer with h)≥1500.
[0043] b) Preparation of inner layer 112: Select 30-50 g / m 2 The weight of pure cotton nonwoven fabric is processed to form a pure cotton nonwoven fabric layer. The surface of the cotton fibers in the nonwoven fabric layer is then subjected to hydrophobic modification treatment to form a fiber structure of "inner hydrophilic and outer hydrophobic", which is the inner layer 112 material.
[0044] c) Surface layer 11 lamination: The surface layer 111 and the inner layer 112 material are bonded together with hot melt adhesive to form the surface layer 11 material. Then the surface layer 11 material is cut and packaged with a width of 17-18cm.
[0045] Step 2, Preparation of the flow guide layer 12:
[0046] 12-24D coarse denier fiber and 6-10D fine denier fiber were selected respectively, and the two types of fibers were carded by two carding machines respectively, with the single layer weight set at 10-25gsm.
[0047] Then, the two fibers are punctured with hot air at a temperature controlled between 110-200℃. Under the action of hot air, the surface layer 111 of the fibers melts and bonds together to form a double-layer hot air cloth with a density difference, namely the flow guiding layer 12. The weight of the hot air cloth material is 20-50 gsm, and the thickness is controlled between 1.0-3.0 mm.
[0048] Step 3, Preparation of Absorber Core Layer 13:
[0049] a) Rapid Absorption Layer 131: Hot air nonwoven fabric is selected, and a small amount of fluff pulp (10-30g) is added to mix with absorbent polymer (SAP). A porous fiber network is formed by hot air puncture, which is the rapid absorption layer 131 material.
[0050] b) Water-locking layer 132: SAP particles and bamboo charcoal fiber layer are used to form the water-locking layer 132 material.
[0051] c) The fast-absorbing layer 131 and the water-locking layer 132 are wrapped with hydrophilic spunbond fabric to form a double-layer absorbent core layer 13 material.
[0052] Step 4, Finished Product Preparation:
[0053] The surface layer 11, the flow-guiding layer 12, and the absorbent core layer 13 are sequentially bonded together with hot melt adhesive, and then the bottom film 14, the elastic front waistband 2, and the elastic back waistband 3 are attached to form a diaper. The diaper is then packaged into a finished product using an online packaging device.
[0054] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A dry, highly absorbent diaper, characterized in that: The diaper includes a main body and elastic front waistbands and elastic back waistbands connected to both ends of the main body. The elastic front waistbands and elastic back waistbands are detachably connected. The main body of the diaper is provided with a top layer, a flow-guiding layer, an absorbent core layer and a bottom film from top to bottom. The top layer includes a surface layer and an inner layer. The surface layer is in direct contact with the skin, and the inner layer is attached to the surface layer. The inner layer has a hydrophobic surface on the side facing the flow-guiding layer.
2. The dry, highly absorbent diaper according to claim 1, characterized in that: The outer layer has a mesh-like micro-convex structure on the side opposite to the inner layer.
3. The dry, highly absorbent diaper according to claim 1, characterized in that: The outer layer is a pure cotton high-count yarn layer, and the inner layer is a pure cotton non-woven fabric layer.
4. The dry, highly absorbent diaper according to claim 1, characterized in that: The flow guiding layer has a flow guiding mesh structure, and the density of the flow guiding mesh structure is less on the side closer to the surface layer than on the side farther away from the surface layer.
5. The dry, highly absorbent diaper according to claim 1, characterized in that: The absorbent core layer includes a fast-absorbing layer and a water-locking layer. The fast-absorbing layer is disposed near the flow guiding layer, and the water-locking layer is disposed near the bottom membrane. The fast-absorbing layer is used to quickly absorb liquid, and the water-locking layer is used to adsorb and lock liquid.
6. The dry, highly absorbent diaper according to claim 5, characterized in that: The rapid absorption layer includes a hot-air nonwoven fabric layer with a porous fiber mesh structure, wherein fluff pulp and superabsorbent resin are uniformly mixed within the hot-air nonwoven fabric layer.
7. The dry, highly absorbent diaper according to claim 5, characterized in that: The water-locking layer includes a bamboo charcoal fiber layer, and super absorbent resin particles are disposed within the bamboo charcoal fiber layer.
8. The dry, highly absorbent diaper according to claim 1, characterized in that: The elastic front waistband has Velcro straps on both sides, and the elastic back waistband has Velcro straps that are compatible with and can be adhered to the Velcro straps.