Leakproof paper diaper

Abstract

The utility model relates to paper diaper technical field, especially a kind of leakproof paper diaper, including paper diaper body and absorbent core layer, the side of paper diaper body corresponding human back is provided with the end of absorbent core layer length direction covered by leakproof cloth piece, the bottom edge of leakproof cloth piece integrally formed with the elastic stretchable cloth that is automatically opened to fit human back skin after stretching;Elastic stretchable cloth includes integrally formed folding layer and connecting layer, folding layer is folded from bottom to top from the bottom edge of connecting layer;Folding layer bottom and connecting layer bottom between being provided with bending section, folding layer inside, bending section inside and connecting layer inside are provided with elastic line, and the elasticity of each elastic line sequentially decreases in order.Elastic deformation when wearing folding layer stretch, drive folding layer to open and stand up and fit skin, to form a "barricade", and skin is fitted at all times, "barricade" blocks urine, effectively avoid when person lies flat, urine flows out along the situation of the groove gap of vertebral column root.

Description

Technical Field

[0001] This utility model relates to the field of diaper technology, and in particular to a leak-proof diaper. Background Technology

[0002] As a core hygiene product in the fields of infant daily care and adult incontinence care, the leak-proof performance and fit of diapers directly determine the user experience and are a core area for long-term optimization in the industry. With the upgrading of consumer demand, users not only require diapers to have efficient urine absorption capacity, but also place higher demands on "leak-proof stability in dynamic scenarios," especially for high-frequency activities such as infants rolling over, crawling, and standing, and adults bending over, turning over, and lying flat. It is necessary to avoid the leak-proof structure from detaching from the skin due to body movements, thereby causing leakage accidents.

[0003] Currently, to address the leakage problem at the base of the spine, existing technologies have developed targeted solutions. For example, Chinese patent CN215273906U discloses a leak-proof diaper. Specifically, it discloses a leak-proof patch at one end of the diaper's length, with one side of the patch adhered to the surface layer and leak-proof sidewalls, while the remaining areas are not adhered, forming a semi-open pocket-like structure. An "elastic body point-break design" enhances the patch's elasticity to prevent urine from flowing along the grooves at the base of the spine when lying flat. While this solution fills the technological gap in "static leak prevention at the base of the spine," the existing semi-open pocket-like structure is only designed for static lying scenarios. The fit of its opening edge depends on the natural contact between the skin and the patch. When the body is in dynamic activity (such as an infant rolling over or an adult getting up), the opening edge of the pocket-like structure easily detaches from the skin surface, failing to actively seal new gaps created by activity. Therefore, this paper provides a leak-proof diaper to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a leak-proof diaper to address the shortcomings of existing technologies, thereby solving the technical problem that the leak-proof structure in existing paper diapers does not automatically adjust its fit with the movement of the human waist.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A leak-proof diaper includes a diaper body. An absorbent core layer is provided in the lower middle part of the inner side of the diaper body. The two ends of the absorbent core layer extend to the side of the diaper body corresponding to the abdomen and the side corresponding to the back of the human body, respectively. A leak-proof sheet is provided on the side of the diaper body corresponding to the back of the human body, covering the ends of the absorbent core layer in the length direction and preventing urine from leaking from the waist seam. The middle position of the top edge of the leak-proof sheet is glued to the end of the absorbent core layer in the length direction. The left and right ends of the top edge of the leak-proof sheet are glued to the side of the diaper body corresponding to the back of the human body. The left and right sides of the leak-proof sheet are fixedly attached to the inner side of the diaper body. The bottom edge of the leak-proof sheet is integrally formed with an elastic stretch fabric that automatically expands to fit the skin of the human back when stretched. The elastic stretch fabric includes an integrally formed folding layer and a connecting layer. The folding layer is folded from the bottom edge of the connecting layer upwards to make the thickness cross-section of the elastic stretch fabric "U" or "V" shaped. A bending section is provided between the bottom of the folding layer and the bottom of the connecting layer. Elastic lines are provided inside the folding layer, inside the bending section, and inside the connecting layer, and the elasticity of each elastic line decreases sequentially.

[0006] Furthermore, the length direction of the elastic stretch fabric is the transverse direction of the diaper body, and the width direction is the longitudinal direction of the diaper body; the length direction of the elastic lines inside the folded layer is consistent with the length direction of the folded layer, and the length direction of the elastic lines inside the bending section and the length direction of the elastic lines inside the connecting layer are both consistent with the length direction of the connecting layer.

[0007] Furthermore, at least two elastic lines are provided inside the folded layer, and the elasticity of the elastic lines inside the folded layer decreases from top to bottom.

[0008] Furthermore, the leak-proof fabric sheet is arc-shaped.

[0009] Furthermore, the top edge of the connecting layer is integrally formed with the bottom edge of the leak-proof fabric.

[0010] Furthermore, the left and right sides of the leak-proof fabric sheet are both formed with connecting parts.

[0011] Furthermore, the connecting part is heat-pressed and bonded to the inside of the diaper body.

[0012] Furthermore, the connecting part is glued to the inside of the diaper body.

[0013] Furthermore, it also includes an elastic waistband set on the diaper body, with a skin-friendly layer pasted on the inside of the elastic waistband, and both ends of the absorbent core layer in the length direction sandwiched between the skin-friendly layer and the inside of the elastic waistband.

[0014] Furthermore, the inner sides of both ends of the absorbent core layer along its length are bonded to the skin-friendly layer with adhesive, and the outer sides of both ends of the absorbent core layer along its length are bonded to the inner side of the elastic waistband with adhesive.

[0015] The beneficial effects of this utility model are: 1. When wearing a diaper, the waist of the human body will apply lateral tension to the elastic fabric (that is, the stretching force along the left and right direction of the diaper body). The elastic fabric is automatically stretched and opened, so that the bottom edge of the leak-proof cloth fits tightly against the skin of the human back. The diaper body, the side corresponding to the human back, the leak-proof cloth, and the stretched elastic fabric combine to form a pocket-shaped structure with the opening facing down, which catches the urine for the absorbent core to absorb.

[0016] 2. Based on the curvature of the human back (i.e., from the waist to the hips), the shape of the leak-proof fabric and the elastic stretch fabric can cover the area from the waist to the upper edge of the hips. The elastic stretch fabric automatically adjusts its fit with waist movement through "stretching and rebounding", avoiding gaps between the fabric and the skin due to bending or turning the body. The stretching direction is always "fitting the skin" and will not "lean outward".

[0017] 3. When not worn, the elastic fabric is in a naturally contracted state due to the characteristics of its elastic threads. Specifically, the elastic threads in the folded layer slightly contract, keeping the opening of the U / V-shaped section "slightly closed." The elastic threads in the connecting layer and the elastic threads in the bending section contract slightly synchronously, fixing the connecting layer in a "straight" state and slightly adhering to the folded layer. The leak-proof fabric and the connecting layer also slightly adhere to the absorbent core layer. When wearing a diaper, the waist of the body applies lateral tension to the elastic fabric, causing the folded layer to elastically deform during the stretching process, opening and standing up to adhere to the skin, thus forming a "barrier" that stays in contact with the skin at all times. This "barrier" effectively prevents urine from flowing out along the grooves and gaps at the base of the spine when the person is lying down, especially in cases where it is used by infants, reducing the risk of side leakage. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the leak-proof part of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the elastic stretch fabric of this utility model.

[0021] The reference numerals in the figures include: 1. Diaper body; 2. Elastic waistband; 3. Skin-friendly layer; 4. Absorbent core layer; 5. Leak-proof fabric; 6. Elastic stretch fabric; 61. Fold-over layer; 62. Connecting layer; 63. Elastic thread; 7. Connecting part. Detailed Implementation

[0022] The following is a detailed description of a leak-proof diaper according to the present invention, with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, an embodiment of the leak-proof diaper of the present invention includes a diaper body 1, and an absorbent core layer 4 for absorbing urine is provided in the lower middle part of the inner side of the diaper body 1. The absorbent core layer 4 is arranged in a U-shape. The two ends of the absorbent core layer 4 in the length direction (corresponding to the abdominal side and the back side of the human body, respectively) extend to the side of the diaper body 1 corresponding to the abdominal side and the side corresponding to the back side of the human body, respectively.

[0024] In this embodiment, the diaper body 1 has a leak-proof sheet 5 on one side corresponding to the back of the human body, which covers the end of the absorbent core layer 4 along its length and prevents urine from leaking from the waist seam. The leak-proof sheet 5 is arc-shaped, and the length of its bottom edge is adapted to the curve of the human waist. The middle position of the top edge of the leak-proof sheet 5 is glued to the back end of the absorbent core layer 4 along its length. The left and right ends of the top edge of the leak-proof sheet 5 are glued to the inner rear side of the diaper body 1. The left and right sides of the leak-proof sheet 5 are fixedly attached to the inner side of the diaper body 1 (corresponding to the back extension area of ​​the left and right sides of the absorbent core layer 4). The bottom edge of the leak-proof sheet 5 is integrally formed with an elastic stretch fabric 6 that automatically expands after stretching to fit the skin of the human back.

[0025] The elastic fabric 6 is automatically stretched and opened when worn, so that the bottom edge of the leak-proof fabric 5 fits tightly against the skin of the human back. The diaper body 1, the leak-proof fabric 5, and the stretched elastic fabric 6 together form a pocket-shaped structure with the opening facing down. Specifically, in combination with the curvature of the human back (i.e., from the waist to the buttocks), the shape of the leak-proof fabric 5 and the elastic fabric 6 can cover the area from the waist to the upper edge of the buttocks. The elastic fabric 6 automatically adjusts the fit with waist movement through "stretching and rebounding", avoiding gaps between the fabric and the skin due to bending or turning of the body.

[0026] like Figure 3 As shown, the elastic stretch fabric 6 includes an integrally formed folding layer 61 and a connecting layer 62. The folding layer 61 folds upwards from the bottom edge of the connecting layer 62, so that the thickness cross-section of the elastic stretch fabric 6 is U-shaped or V-shaped. The length direction of the elastic stretch fabric 6 is the transverse direction of the diaper body 1 (i.e., the left-right direction around the waist), and the width direction is the longitudinal direction of the diaper body 1 (i.e., the up-down direction from the back to the buttocks). A bending section is provided between the bottom of the folding layer 61 and the bottom of the connecting layer 62. Elastic lines 63 are provided inside the folding layer 61, the bending section, and the connecting layer 62. The length direction of the elastic lines 63 inside the folding layer 61 is consistent with the length direction of the folding layer 61 (i.e., the stretching direction), and the length directions of the elastic lines 63 inside the bending section and the connecting layer 62 are both consistent with the length direction of the connecting layer 62 (i.e., the stretching direction). The top edge of the connecting layer 62 is integrally formed with the bottom edge of the leak-proof fabric 5.

[0027] The elastic thread 63 is made of elastic spandex yarn. The elasticity of the elastic thread 63 inside the folded layer 61, inside the bent section, and inside the connecting layer 62 decreases sequentially. At least two elastic threads 63 are provided inside the folded layer 61, and the elasticity of the elastic thread 63 inside the folded layer 61 decreases sequentially from top to bottom.

[0028] When not worn, the elastic fabric 6 is in a naturally contracted state due to the characteristics of the elastic threads 63. Specifically, the elastic threads 63 in the folded layer 61 slightly contract, keeping the opening of the U / V-shaped section in a "slightly closed" state. The elastic threads 63 in the connecting layer 62 and the elastic threads 63 in the bending section contract slightly synchronously, fixing the connecting layer 62 in a "straight" state and slightly adhering to the folded layer 61 (e.g., Figure 3 (As shown); the leak-proof fabric 5 and the connecting layer 62 will also be slightly bonded to the absorbent core layer 4.

[0029] When wearing a diaper, the waist exerts lateral tension (i.e., stretching force along the left-right direction of the diaper body 1) on the elastic stretch fabric 6, causing the folded layer 61 to elastically deform during wear and stretching. This causes the folded layer 61 to open and stand upright, conforming to the skin, thus forming a "barrier". Specifically, the highly elastic thread 63 provides a stable "fixed base" for the "opening" of the folded layer 61 through its own high elasticity when stretched; after the folded layer 61 opens and stands upright to form a "barrier", it is always in close contact with the skin. The "barrier" blocks urine, effectively preventing urine from flowing out along the grooves and gaps at the base of the spine when a person is lying down, especially in the case of infants, reducing the risk of side leakage.

[0030] Connecting portions 7 are formed on both the left and right sides of the leak-proof fabric sheet 5. These connecting portions 7 are heat-pressed and bonded to the inner side of the diaper body 1, or they can be bonded with adhesive. Utilizing the principles of heat and pressure, after heat pressing and natural cooling, the melted fibers re-solidify, firmly bonding the connecting portions 7 to the inner side of the diaper body 1. This ensures a stable fit for the entire leak-proof fabric sheet 5, preventing it from easily falling off during use and improving the quality of the diaper. The leak-proof fabric sheet 5, the folding layer 61, the connecting layer 62, and the connecting portions 7 can all be made of PE film composite non-woven fabric.

[0031] The diaper body 1 also features an elastic waistband 2 (corresponding to the waist area of ​​the human body, made of elastic non-woven fabric with stretching and resilience). A skin-friendly layer 3 is adhered to the inner side of the elastic waistband 2 (the side facing the skin). After use, the inner side of the elastic waistband 2 is separated from the skin by the skin-friendly layer 3. The skin-friendly layer 3 can be spunbond meltblown nonwoven fabric (SMS), which has high breathability, low allergenicity, and excellent softness. It reduces friction between the elastic waistband 2 and the skin to protect the skin and improve wearing comfort, while also filling the gaps between the waistband and the skin through its good fit, helping to prevent urine leakage.

[0032] Both ends of the absorbent core layer 4 are sandwiched between the skin-friendly layer 3 and the inner side of the elastic waistband 2. The inner sides of both ends of the absorbent core layer 4 in the length direction are bonded to the skin-friendly layer 3 with glue, and the outer sides of both ends of the absorbent core layer 4 in the length direction are bonded to the inner side of the elastic waistband 2 with glue, so that the diaper forms a layered structure from the inside to the outside (from the skin side to the outside) of "skin-friendly layer-absorbent core layer-bottom film". The bottom film is the outermost polyethylene waterproof film of the diaper body 1.

[0033] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0034] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A leak-proof diaper, comprising a diaper body (1), wherein an absorbent core layer (4) is disposed on the lower middle part of the inner side of the diaper body (1), and the two ends of the absorbent core layer (4) extend to the side of the diaper body (1) corresponding to the abdomen and the side corresponding to the back of the human body, respectively, characterized in that: The diaper body (1) has a leak-proof cloth (5) on one side of the back of the human body, which covers the end of the absorbent core layer (4) in the length direction and is used to prevent urine from leaking from the waist seam. The middle position of the top edge of the leak-proof cloth (5) is glued to the end of the absorbent core layer (4) in the length direction. The left and right ends of the top edge of the leak-proof cloth (5) are glued to the side of the diaper body (1) on the back of the human body. The left and right sides of the leak-proof cloth (5) are fixedly attached to the inside of the diaper body (1). The bottom edge of the leak-proof cloth (5) is integrally formed with an elastic stretch cloth (6) that automatically expands after stretching to fit the skin of the human back. The elastic stretch fabric (6) includes an integrally formed folding layer (61) and a connecting layer (62). The folding layer (61) is folded from the bottom edge of the connecting layer (62) upwards to make the thickness cross section of the elastic stretch fabric (6) "U" or "V" shaped. A bending section is provided between the bottom of the folding layer (61) and the bottom of the connecting layer (62). Elastic lines (63) are provided inside the folding layer (61), inside the bending section, and inside the connecting layer (62), and the elasticity of each elastic line (63) decreases sequentially.

2. The leak-proof diaper according to claim 1, characterized in that: The length direction of the elastic stretch fabric (6) is the transverse direction of the diaper body (1), and the width direction is the longitudinal direction of the diaper body (1); the length direction of the elastic line (63) inside the folded layer (61) is consistent with the length direction of the folded layer (61), and the length direction of the elastic line (63) inside the bending section and the length direction of the elastic line (63) inside the connecting layer (62) are both consistent with the length direction of the connecting layer (62).

3. The leak-proof diaper according to claim 2, characterized in that: The folded layer (61) has at least two elastic lines (63) inside, and the elasticity of the elastic lines (63) inside the folded layer (61) decreases from top to bottom.

4. The leak-proof diaper according to claim 1, characterized in that: The leak-proof fabric sheet (5) is arc-shaped.

5. A leak-proof diaper according to claim 1, characterized in that: The top edge of the connecting layer (62) is integrally formed with the bottom edge of the leak-proof cloth (5).

6. A leak-proof diaper according to claim 1, characterized in that: The left and right sides of the leak-proof fabric sheet (5) are both formed with connecting parts (7).

7. A leak-proof diaper according to claim 6, characterized in that: The connecting part (7) is heat-pressed to the inside of the diaper body (1).

8. A leak-proof diaper according to claim 6, characterized in that: The connecting part (7) is glued to the inside of the diaper body (1).

9. A leak-proof diaper according to claim 1, characterized in that: It also includes an elastic waistband (2) disposed on the diaper body (1), a skin-friendly layer (3) is pasted on the inside of the elastic waistband (2), and the two ends of the absorbent core layer (4) in the length direction are sandwiched between the skin-friendly layer (3) and the inside of the elastic waistband (2).

10. A leak-proof diaper according to claim 9, characterized in that: The inner sides of both ends of the absorbent core layer (4) along the length direction are bonded to the skin-friendly layer (3) with glue, and the outer sides of both ends of the absorbent core layer (4) along the length direction are bonded to the inner side of the elastic waistband (2) with glue.

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