Baby diaper with three-layer leakage prevention

Abstract

The utility model relates to baby hygiene product technical field discloses a kind of three-layer leakage-proof baby paper diaper, including paper diaper body, the paper diaper body is divided into front waist circumference area, crotch area and rear waist circumference area along length direction, the paper diaper body is sequentially arranged from top to bottom by skin-friendly surface layer, composite absorbent core, waterproof bottom film, the paper diaper body is provided with three-layer leakage-proof structure.The utility model in the paper diaper body, through three-dimensional leakage-proof structure each post and cooperate, first layer three-dimensional protective surrounding is attached to infant thigh root, effectively blocks urine side leakage from side, still through water-absorbing cotton sheet adsorbs trace liquid leakage;Second layer annular leakage-proof baffle forms secondary interception, prevents urine before and after spread, and its uniform elasticity design ensures and is closely attached to infant waist abdomen;Third layer pouch-shaped leakage-proof pad layer specially deals with the problem of back leakage, quickly adsorbs residual urine, simultaneously, the hierarchical structure of composite absorbent core is high-efficiency flow guide, stores and locks urine.

Description

Technical Field

[0001] This utility model relates to the field of baby hygiene products technology, and in particular to a baby diaper with three layers of leak-proof design. Background Technology

[0002] As a core product for daily care of infants and young children, the leak-proof performance of baby diapers directly affects the baby's wearing comfort and the parents' user experience. It is a core technology direction for continuous iteration and optimization in the industry. With the upgrading of consumer demand, many baby diaper products with leak-proof functions have appeared on the market. Most of these products attempt to solve the problem of urine leakage in daily use by adding basic three-dimensional protective barriers and thickening the absorbent core, which has become the mainstream design concept in the current field of infant and young child care products. Existing conventional leak-proof diapers generally have significant technical shortcomings, making it difficult to cover all leakage prevention needs in all scenarios. Most products rely solely on single-layer three-dimensional side guards on both sides of the crotch for side protection. These guards often have uneven elasticity, easily creating gaps when the baby rolls over or lies on their side, failing to completely prevent side leakage. Furthermore, the edges of the guards lack a corresponding micro-absorbent structure, allowing even small amounts of leakage to directly soak the baby's groin skin, causing redness and discomfort. In addition, the leak-proof design of these products only focuses on side protection, lacking a ring-shaped interception structure around the waist and crotch. When the baby urinates a large amount of urine in a short period of time, the urine can easily spread along the absorbent core to the front and back sides, resulting in front leakage wetting clothes and back leakage staining sheets. These defects are particularly prominent in scenarios where the baby wears the diaper for extended periods at night. Therefore, a three-layer leak-proof baby diaper is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a baby diaper with three layers of leak protection, which aims to improve the existing three-layer leak protection baby diaper's single leak protection structure, incomplete protective coverage, and easy occurrence of side leakage, front leakage, and back leakage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a baby diaper with three layers of leak-proof design, comprising a diaper body, wherein the diaper body is divided into a front waist area, a crotch area and a back waist area along the length direction, and the diaper body is composed of a skin-friendly surface layer, a composite absorbent core and a waterproof bottom film arranged sequentially from top to bottom, and the diaper body is provided with a three-layer leak-proof structure. The three-layer leak-proof structure includes a first layer of three-dimensional protective barriers on the left and right sides of the crotch area, a second layer of annular leak-proof baffles at the junction of the front waist area, crotch area, and back waist area, and a third layer of pouch-shaped leak-proof padding on the inner side of the back waist area. The first layer of three-dimensional protective barriers is raised upwards, the second layer of annular leak-proof baffles surrounds the upper part of the crotch area, and the third layer of pouch-shaped leak-proof padding is recessed downwards to form a urine catcher. The first layer of three-dimensional protective barriers, the second layer of annular leak-proof baffles, and the third layer of pouch-shaped leak-proof padding are all bonded to the waterproof bottom membrane as a whole.

[0005] As a further description of the above technical solution: the first layer of three-dimensional protective barrier includes water-repellent non-woven fabric and longitudinal elastic bands. The longitudinal elastic bands are fixed to the free end of the water-repellent non-woven fabric and are arranged along the length of the diaper.

[0006] As a further description of the above technical solution: a thin absorbent cotton sheet is attached to the inner side of the water-repellent non-woven fabric, and the length of the absorbent cotton sheet is consistent with the length of the first layer of three-dimensional protective enclosure.

[0007] As a further description of the above technical solution: the second layer of annular leak-proof baffle is an arc-shaped folded structure, and the upper end of the second layer of annular leak-proof baffle is higher than the top height of the first layer of three-dimensional protective enclosure.

[0008] As a further description of the above technical solution: several flat rubber bands are arranged horizontally inside the second layer of the annular leak-proof edge, and the spacing between adjacent flat rubber bands is 4-8mm.

[0009] As a further description of the above technical solution: the third layer of the pocket-shaped leak-proof pad is formed by folding the waterproof bottom membrane backward to form a double membrane, and the middle of the double membrane is filled with fluffy water-absorbing resin particles.

[0010] As a further description of the above technical solution: the composite absorption core is divided into an upper flow guiding core, a middle water storage core, and a lower water locking core. The upper flow guiding core has a flow guiding groove on the inner side of the first layer of three-dimensional protective enclosure.

[0011] As a further description of the above technical solution: the waterproof bottom membrane is a breathable PE membrane, and the area of ​​the waterproof bottom membrane corresponding to the three-layer leak-proof structure is thickened, with a thickness of 0.12-0.20mm.

[0012] As a further description of the above technical solution: both the front waist area and the rear waist area are provided with elastic waist patch components, and the elastic waist patch components are connected to the end of the second layer of annular leak-proof edge.

[0013] As a further description of the above technical solution: the skin-friendly surface layer is a perforated hot air nonwoven fabric, and the surface of the skin-friendly surface layer is provided with an antibacterial and hydrophilic coating.

[0014] This utility model has the following beneficial effects: 1. This utility model employs a three-layer three-dimensional leak-proof structure, each layer functioning independently yet working in concert. The first layer, a three-dimensional protective barrier, fits snugly against the baby's groin, effectively preventing side leakage of urine and absorbing trace amounts of seepage through absorbent cotton pads. The second layer, a ring-shaped leak-proof edge, forms a secondary interception, preventing urine from spreading forward and backward. Its uniform elastic design ensures a close fit to the baby's waist and abdomen. The third layer, a pocket-shaped leak-proof pad, is specifically designed to address back leakage, quickly absorbing residual urine. Simultaneously, the layered structure of the composite absorbent core efficiently guides, stores, and locks in urine. Combined with a locally thickened breathable and waterproof bottom membrane, it enhances leak-proof capabilities while ensuring breathability, comprehensively protecting the baby from dryness and comfort, eliminating parents' worries about urine leakage.

[0015] 2. This utility model uses perforated hot-air non-woven fabric for the skin-friendly surface layer, which is soft, skin-friendly, and breathable, reducing irritation to the baby's delicate skin. The antibacterial and hydrophilic coating on the surface can not only quickly wick away urine but also inhibit bacterial growth, reducing the probability of skin problems on the baby's buttocks. The elastic waistband component and the ring-shaped leak-proof structure form an integrated linkage, which adapts to the tightness of the baby's waistband, seals the dead corners of leakage, and prevents urine from leaking through loose gaps. These thoughtful designs ensure the safety and comfort of the baby's clothing from multiple dimensions, allowing the baby to enjoy a dry and comfortable experience while moving freely or sleeping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a three-layer leak-proof baby diaper proposed in this utility model; Figure 2 This is a schematic diagram of the structure of a three-layer leak-proof baby diaper, including the first layer of three-dimensional protective barrier, longitudinal elastic band, and thin absorbent cotton. Figure 3 A schematic diagram of the cross-sectional structure of a three-layer leak-proof baby diaper body proposed in this utility model. Figure 4 This is a schematic diagram of the cross-sectional structure of the composite absorbent core of a three-layer leak-proof baby diaper proposed in this utility model.

[0017] Legend: 1. Diaper body; 2. Skin-friendly surface layer; 3. Composite absorbent core; 4. Waterproof bottom film; 5. First layer three-dimensional protective barrier; 6. Second layer ring-shaped leak-proof side guard; 7. Third layer pocket-shaped leak-proof padding; 8. Vertical elastic band; 9. Thin absorbent cotton; 10. Elastic waistband assembly; 11. Front waistband area; 12. Crotch area; 13. Back waistband area; 14. Water-repellent non-woven fabric; 15. Upper diversion core; 16. Middle water-retaining core; 17. Lower water-locking core. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 This utility model provides an embodiment of a three-layer leak-proof baby diaper. The diaper includes a diaper body 1, which is divided along its length into a front waistband area 11, a crotch area 12, and a back waistband area 13. The diaper body 1 is composed of a skin-friendly surface layer 2, a composite absorbent core 3, and a waterproof bottom film stacked from top to bottom to form an integral base. The diaper body 1 has a three-layer leak-proof structure, specifically including a first layer of three-dimensional protective barrier 5, a second layer of annular leak-proof side guards 6, and a third layer of pocket-shaped leak-proof padding 7. The first layer of three-dimensional protective barrier 5 is symmetrically arranged on the left and right sides of the crotch area 12 and rises upward to form a side leak-proof barrier; the second layer of annular leak-proof barrier 6 is wrapped around the junction of the front waist area 11, the crotch area 12 and the back waist area 13, and is set around the upper end of the crotch area 12; the third layer of pouch-shaped leak-proof pad 7 is set inside the back waist area 13 and is recessed downward to form a urine collection pouch. The bottoms of the first layer of three-dimensional protective barrier 5, the second layer of annular leak-proof barrier 6 and the third layer of pouch-shaped leak-proof pad 7 are all firmly bonded to the waterproof bottom membrane 4 to form an integrated three-dimensional leak-proof system.

[0020] Reference Figure 2 The first layer of three-dimensional protective barrier 5 is mainly composed of water-repellent non-woven fabric 14 and longitudinal elastic band 8. The longitudinal elastic band 8 is fixedly bonded to the free end of the water-repellent non-woven fabric 14. The longitudinal elastic band 8 is laid longitudinally along the length of the diaper body 1. The contraction force of the longitudinal elastic band 8 drives the water-repellent non-woven fabric 14 to continuously fold and bulge upward, so that the first layer of three-dimensional protective barrier 5 naturally fits the root of the baby's thigh, eliminates the gap in wearing, and effectively prevents urine leakage when lying on the side or turning over.

[0021] Reference Figure 2 A thin absorbent cotton pad 9 is attached to the surface of the water-repellent nonwoven fabric 14 facing the inside of the diaper. The length of the thin absorbent cotton pad 9 is exactly the same as the overall length of the first layer of three-dimensional protective barrier 5. It can absorb the trace amount of urine that seeps out from the edge of the protective barrier throughout the process, avoid the overflow of liquid from soaking the skin, and further improve the tightness of the side leakage protection.

[0022] Reference Figure 1The second-layer annular leak-proof edge 6 is formed by an arc-shaped folding structure, and the upper end of the second-layer annular leak-proof edge 6 is higher than the top end of the first-layer three-dimensional protective barrier 5, forming a two-level interception structure with staggered heights, which can effectively intercept urine spreading along the front and back of the composite absorbent core 3, and avoid front leakage and back leakage.

[0023] Reference Figure 1 The second layer of the annular leak-proof edge 6 has multiple flat elastic bands arranged horizontally inside, with the spacing between two adjacent flat elastic bands controlled at 4-8mm. The evenly distributed flat elastic bands make the second layer of the annular leak-proof edge 6 have uniform elasticity and balanced force. When worn, it can adapt to the baby's waist and abdomen curve and fit tightly, effectively preventing the edge from lifting, hanging, or creating gaps, and ensuring that the circumferential leak-proof structure fits and seals throughout.

[0024] Reference Figure 1 The third layer of the leak-proof pad 7 is located inside the back waist area 13. It is formed by folding the waterproof bottom membrane 4 backward to form a double membrane structure. The internal cavity of the double membrane is filled with fluffy water-absorbing resin particles. After being folded and filled, the third layer of the leak-proof pad 7 naturally sinks downward to form a pocket-shaped urine collection structure. It is specially designed to intercept and collect urine leakage when the baby is lying flat, sleeping on their back, or urinating heavily at night. The fluffy water-absorbing resin particles inside quickly absorb and lock in residual overflowing urine, preventing leakage and urine backflow.

[0025] Reference Figure 4 The composite absorbent core 3 has a three-layer composite structure, consisting of an upper flow-guiding core 15, a middle water-storing core 16, and a lower water-locking core 17 from top to bottom. The upper flow-guiding core 15 has flow-guiding grooves on the inner side of the first layer of three-dimensional protective enclosure 5 on both sides. The flow-guiding grooves can quickly guide the surface urine to the middle and bottom of the core, preventing urine from accumulating and overflowing on both sides of the crotch. The middle water-storing core 16 is used to temporarily store a large amount of urine in an instant and buffer the flow pressure. The lower water-locking core 17 firmly locks in the moisture, effectively preventing urine backflow and ensuring that the surface layer is dry.

[0026] Reference Figure 3 The waterproof bottom membrane 4 is made of breathable PE membrane material, which takes into account the overall breathability and heat dissipation. At the same time, it only makes local thickening treatment on the bottom membrane area corresponding to the three-layer leak-proof structure, with the thickening thickness set at 0.12-0.20mm. Without affecting the overall wearable breathability and comfort, it specifically strengthens the water-proof and seepage-proof ability of key leak-proof areas.

[0027] Reference Figure 1Both the front waistband 11 and the back waistband 13 of the diaper body 1 are equipped with elastic waistband components 10. The end of the elastic waistband component 10 is fixedly connected to the end of the second layer of annular leak-proof edge 6, forming an integrated linkage structure of elastic waistband and annular leak-proof structure. When worn, the elastic waistband component 10 adapts to the tightness of the baby's waistband and simultaneously pulls the second layer of annular leak-proof edge 6 to fit the waist and abdomen joint position, completely sealing the leakage dead corner at the waist and crotch joint and preventing leakage from loose gaps.

[0028] Reference Figure 3 The skin-friendly surface layer 2 is made of perforated hot air non-woven fabric, which is breathable, soft and skin-friendly, suitable for babies' delicate skin. At the same time, the surface of the skin-friendly surface layer 2 is equipped with an antibacterial and hydrophilic coating, which can quickly penetrate and drain urine while inhibiting bacterial growth, effectively reducing the probability of skin problems such as redness and eczema on the baby's buttocks, and greatly improving the safety and comfort of wearing it.

[0029] Working Principle: This utility model adopts a three-layer, three-dimensional closed-loop all-round leak-proof layout. The first layer (three-dimensional protective barrier 5) prevents side leakage; the second layer (ring-shaped leak-proof edge 6) prevents front and rear leakage; and the third layer (pocket-shaped leak-proof pad 7) prevents back leakage. Combined with a three-layer composite absorbent core 3 for rapid urine drainage, water storage and locking, a locally thickened breathable bottom film for water and breathability, an antibacterial and skin-friendly surface layer 2 for safe skin protection, and an integrated linked waistband sealing structure, this comprehensively solves the shortcomings of traditional diapers, such as simple structure, easy leakage, stuffiness and lack of breathability, and limited adaptability to different postures. This structure is compact, neatly assembled, and has clear protective layers, suitable for various wearing scenarios such as side-lying, rolling over, lying flat, daily activities, and nighttime sleep. The leak-proof effect is stable and reliable, the diaper is comfortable and breathable, and production and assembly are convenient, making it suitable for industrial-scale mass production and application.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-layer leak-proof baby diaper, comprising a diaper body (1), characterized in that: The diaper body (1) is divided into a front waist area (11), a crotch area (12) and a back waist area (13) along the length direction. The diaper body (1) consists of a skin-friendly surface layer (2), a composite absorbent core (3) and a waterproof bottom film (4) arranged from top to bottom. The diaper body (1) has a three-layer leak-proof structure. The three-layer leak-proof structure includes a first layer of three-dimensional protective barrier (5) on the left and right sides of the crotch area (12), a second layer of annular leak-proof guardrail (6) at the junction of the front waist area (11), the crotch area (12) and the back waist area (13), and a third layer of pouch-shaped leak-proof pad (7) on the inside of the back waist area (13). The first layer of three-dimensional protective barrier (5) is raised upward, the second layer of annular leak-proof guardrail (6) surrounds the upper end of the crotch area (12), and the third layer of pouch-shaped leak-proof pad (7) is recessed downward to form a urine catcher. The first layer of three-dimensional protective barrier (5), the second layer of annular leak-proof guardrail (6) and the third layer of pouch-shaped leak-proof pad (7) are all bonded to the waterproof bottom membrane (4) as a whole.

2. The baby diaper with three-layer leak-proof construction according to claim 1, characterized in that: The first layer of three-dimensional protective barrier (5) includes water-repellent non-woven fabric (14) and longitudinal elastic elastic (8). The longitudinal elastic elastic (8) is fixed to the upturned free end of the water-repellent non-woven fabric (14) and is laid along the length of the diaper.

3. A baby diaper with three layers of leak-proof construction according to claim 2, characterized in that: The inner side of the water-repellent nonwoven fabric (14) is fitted with a thin absorbent cotton sheet (9), and the length of the absorbent cotton sheet is the same as the length of the first layer of three-dimensional protective enclosure (5).

4. A baby diaper with three-layer leak-proof construction according to claim 3, characterized in that: The second layer of the annular leak-proof barrier (6) is an arc-shaped folded structure, and the upper end of the second layer of the annular leak-proof barrier (6) is higher than the top of the first layer of the three-dimensional protective enclosure (5).

5. A baby diaper with three layers of leak-proof construction according to claim 1, characterized in that: The second layer of the annular leak-proof edge (6) has several horizontally arranged flat rubber bands, with a spacing of 4-8mm between adjacent flat rubber bands.

6. A baby diaper with three layers of leak-proof construction according to claim 1, characterized in that: The third layer of the leak-proof pad (7) is formed by folding the waterproof bottom membrane (4) backward to form a double membrane, with fluffy water-absorbing resin particles filling the middle of the double membrane.

7. A baby diaper with three layers of leak-proof construction according to claim 6, characterized in that: The composite absorption core (3) is divided into an upper flow guiding core (15), a middle water storage core (16), and a lower water locking core (17). The upper flow guiding core (15) has a flow guiding groove on the inner side of the first layer of three-dimensional protective enclosure (5).

8. A baby diaper with three layers of leak-proof construction according to claim 7, characterized in that: The waterproof bottom membrane (4) is a breathable PE membrane, and the area of ​​the waterproof bottom membrane corresponding to the three-layer leak-proof structure is thickened, with a thickness of 0.12-0.20mm.

9. A baby diaper with three layers of leak-proof construction according to claim 1, characterized in that: Both the front waist area (11) and the rear waist area (13) are provided with elastic waist patch components (10), and the elastic waist patch components (10) are connected to the end of the second layer annular leak-proof edge (6).

10. A baby diaper with three layers of leak-proof construction according to claim 9, characterized in that: The skin-friendly surface layer (2) is a perforated hot air nonwoven fabric, and an antibacterial hydrophilic coating is provided on the surface of the skin-friendly surface layer (2).

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