Leak-proof baby diaper

Abstract

The utility model relates to a disposable sanitary article field especially relates to a dynamic activity demand's leakproof baby diaper of preventing side leakage effect good and adapting to different body shape user, including paper diaper body, paper diaper body includes from top to bottom pressure and stack setting liquid -permeable surface layer, absorption core layer and impermeable bottom, liquid -permeable surface layer includes hydrophilic non -woven fabric, two hydrophobic non -woven fabric, first leakproof rubber, second leakproof rubber, first leakproof pad layer, front leakproof piece and rear leakproof piece, hydrophilic non -woven fabric covers the upper surface of absorption core layer, and the transverse both sides of hydrophilic non -woven fabric are downwardly covered in the transverse both sides of absorption core layer, two hydrophobic non -woven fabric distributes in the transverse both sides of hydrophilic non -woven fabric, and the transverse middle part of hydrophobic non -woven fabric is connected with the transverse both sides of hydrophilic non -woven fabric and impermeable bottom compound through first glue layer, first leakproof rubber is located in the transverse inside of hydrophobic non -woven fabric, and is through the transverse inner end folding of hydrophobic non -woven fabric and covers.

Description

Technical Field

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

[0002] The structure of a diaper is generally as follows: from top to bottom, it includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer. The absorbent core layer is made of a combination of fluffy nonwoven fabric and superabsorbent polymer (SAP), or a mixture of wood pulp fiber and SAP and wrapped with nonwoven fabric to form a block structure. It is used to absorb and retain human excrement. The liquid-permeable top layer is composed of hydrophilic nonwoven fabric and hydrophobic nonwoven fabric fixed on both sides of the hydrophilic nonwoven fabric. It is used to provide a comfortable and dry feeling when in contact with the body, while allowing liquid to pass freely into the lower absorbent core layer. The liquid-impermeable bottom layer is composed of a breathable and water-impermeable film and a hydrophobic nonwoven fabric. It is used to keep the absorbed liquid in the absorbent core layer, thereby preventing the absorbed liquid from staining the wearer's pants.

[0003] According to the existing structure of disposable diapers, the leak prevention part mainly relies on the three-dimensional guards on both sides of the liquid-permeable surface layer. Because the elastic band is prone to gaps due to uneven pressure distribution after absorbing liquid in the absorbent layer, liquid can easily seep out from the sides. In addition, the contact surface between the three-dimensional guards and the legs is a single-layer structure, which cannot adapt to the dynamic activity needs of users with different body types. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model provides a leak-proof baby diaper with good side leakage prevention effect and adaptable to the dynamic activity needs of users of different body types.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A leak-proof baby diaper includes a diaper body, defined as extending longitudinally along the length direction of the diaper body and laterally along the width direction of the diaper body. The diaper body has a front waist area, a crotch area, and a back waist area distributed sequentially along the longitudinal direction. The diaper body includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer stacked sequentially from top to bottom. The liquid-permeable top layer, absorbent core layer, and liquid-impermeable bottom layer each have an upper edge and a lower edge distributed at both ends of the longitudinal direction, and a left edge and a right edge distributed at both ends of the lateral direction.

[0007] The liquid-permeable surface layer includes a hydrophilic nonwoven fabric, two hydrophobic nonwoven fabrics, a first leak-proof elastic band, a second leak-proof elastic band, a first leak-proof pad, a front leak-proof sheet, and a rear leak-proof sheet. The hydrophilic nonwoven fabric covers the upper surface of the absorbent core layer, and the two lateral sides of the hydrophilic nonwoven fabric wrap downwards around the two lateral sides of the absorbent core layer. The two hydrophobic nonwoven fabrics are distributed on the lateral sides of the hydrophilic nonwoven fabric, and the lateral middle of the hydrophobic nonwoven fabric is compositely connected to the lateral sides of the hydrophilic nonwoven fabric and the liquid-impermeable bottom layer through a first adhesive layer. The first leak-proof elastic band is located on the lateral inner side of the hydrophobic nonwoven fabric and is folded and wrapped by the lateral inner end of the hydrophobic nonwoven fabric to form a first three-dimensional protective barrier. The second leak-proof elastic band and the first leak-proof pad are located on the lateral outer side of the hydrophobic nonwoven fabric and are folded and wrapped by the lateral outer end of the hydrophobic nonwoven fabric to form a second three-dimensional protective barrier. The second leak-proof elastic band is distributed on the lateral outer side of the first leak-proof pad.

[0008] The left and right edges of the front leak-proof sheet are respectively bonded to the first three-dimensional protective barriers distributed on both sides of the lateral direction through the second and third adhesive layers. The upper edge of the front leak-proof sheet is bonded to the upper edge of the hydrophilic nonwoven fabric through the fourth adhesive layer, so that a front bag with a first opening is formed between the front leak-proof sheet, the two first three-dimensional protective barriers and the liquid-permeable surface layer. The left and right edges of the rear leak-proof sheet are respectively bonded to the second three-dimensional protective barriers distributed on both sides of the lateral direction through the fifth and sixth adhesive layers. The lower edge of the rear leak-proof sheet is bonded to the lower edge of the hydrophilic nonwoven fabric through the seventh adhesive layer, so that a rear bag with a second opening is formed between the rear leak-proof sheet, the two second three-dimensional protective barriers and the liquid-permeable surface layer. An eighth adhesive layer is provided in the middle of the lateral sides of the rear leak-proof sheet for bonding with the first three-dimensional protective barriers and the hydrophilic nonwoven fabric.

[0009] Furthermore, the rear leak-proof sheet includes an upper sheet, a lower sheet, at least one first elastic band, and at least three second elastic bands. The first elastic band is bonded between the upper sheet and the lower sheet and is distributed at the upper edge of the rear leak-proof sheet. Each of the second elastic bands is bonded between the upper sheet and the lower sheet and is distributed between the seventh adhesive layer and the eighth adhesive layer. Each of the second elastic bands is distributed in the transverse direction.

[0010] Furthermore, the stretch ratio of the second elastic band is greater than that of the first elastic band.

[0011] Furthermore, the front leak-proof sheet includes a first sheet layer and at least one third elastic band, the third elastic band being bonded to the longitudinal lower side of the first sheet layer and folded over the lower edge of the first sheet layer.

[0012] Furthermore, the longitudinal length of the absorbent core layer is smaller than that of the liquid-permeable surface layer, and the upper edge of the absorbent core layer is aligned with the upper edge of the liquid-permeable surface layer, thereby forming an expansion cavity between the lower edge of the absorbent core layer and the lower edge of the liquid-permeable surface layer.

[0013] Furthermore, the longitudinal center of the first three-dimensional enclosure is compositely connected to the upper surface of the hydrophilic nonwoven fabric through a ninth adhesive layer, and the ninth adhesive layer does not cover the first leak-proof elastic band.

[0014] Furthermore, a second leak-proof pad is provided at the longitudinal center of the upper surface of the impermeable bottom layer and on the lower side of the second three-dimensional enclosure.

[0015] Furthermore, both the first and second leak-proof pads include bulky nonwoven fabric and superabsorbent polymer particles or fluff pulp mixed with superabsorbent polymer particles sprinkled on the bulky nonwoven fabric.

[0016] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This leak-proof baby diaper utilizes hydrophilic nonwoven fabric, hydrophobic nonwoven fabric, a first leak-proof elastic band, and a second leak-proof elastic band to form a first three-dimensional protective barrier and a second three-dimensional protective barrier, respectively, which enhances the leak-proof performance of the sides and effectively solves the problem in the prior art where gaps are generated due to uneven pressure distribution of the elastic band in the three-dimensional protective barrier, making it easy for liquid to seep out from the sides; at the same time, a front leak-proof sheet and a rear leak-proof sheet are set, which form a front bag and a back bag with the first three-dimensional protective barrier, the second three-dimensional protective barrier, and the liquid-permeable surface layer, respectively, further improving the side leakage prevention effect. Moreover, this structure can better adapt to the dynamic activity needs of users of different body types and reduce the risk of liquid leakage. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a top view of an embodiment of the present invention.

[0019] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0021] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure at the CC section;

[0022] Figure 6 yes Figure 2 A schematic diagram of the cross-sectional structure at point DD. Detailed Implementation

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] The embodiment of this utility model is as follows:

[0025] refer to Figures 1 to 6 As shown, a leak-proof baby diaper includes a diaper body 1, defined as extending along the length direction of the diaper body 1 as the longitudinal direction and extending along the width direction of the diaper body 1 as the transverse direction. The diaper body 1 has a front waist area 101, a crotch area 102 and a back waist area 103 distributed sequentially along the longitudinal direction. The diaper body 1 includes a liquid-permeable surface layer 11, an absorbent core layer 12 and a liquid-impermeable bottom layer 13 stacked sequentially from top to bottom. The liquid-permeable surface layer 11, the absorbent core layer 12 and the liquid-impermeable bottom layer 13 each have an upper edge 201 and a lower edge 202 distributed at both ends of the longitudinal direction and a left edge 203 and a right edge 204 distributed at both ends of the transverse direction.

[0026] The liquid-permeable surface layer 11 includes a hydrophilic nonwoven fabric 21, two hydrophobic nonwoven fabrics 22, a first leak-proof elastic band 23, a second leak-proof elastic band 24, a first leak-proof padding layer 25, a front leak-proof sheet 26, and a rear leak-proof sheet 27. The hydrophilic nonwoven fabric 21 covers the upper surface of the absorbent core layer 12, and the two lateral sides of the hydrophilic nonwoven fabric 21 wrap downwards around the two lateral sides of the absorbent core layer 12. The two hydrophobic nonwoven fabrics 22 are distributed on the lateral sides of the hydrophilic nonwoven fabric 21, and the lateral middle of the hydrophobic nonwoven fabric 22 is bonded to the absorbent core layer 12 by a first adhesive layer 2. The hydrophilic nonwoven fabric 21 is compositely connected to the two transverse sides and the liquid-impermeable bottom layer 13. The first leak-proof elastic band 23 is located on the transverse inner side of the hydrophobic nonwoven fabric 22 and is folded and covered by the transverse inner end of the hydrophobic nonwoven fabric 22 to form a first three-dimensional protective barrier 28. The second leak-proof elastic band 24 and the first leak-proof pad 25 are located on the transverse outer side of the hydrophobic nonwoven fabric 22 and are folded and covered by the transverse outer end of the hydrophobic nonwoven fabric 22 to form a second three-dimensional protective barrier 29. The second leak-proof elastic band 24 is distributed on the transverse outer side of the first leak-proof pad layer 25.

[0027] The left edge 203 and right edge 204 of the front leak-proof sheet 26 are respectively bonded to the first three-dimensional protective barriers 28 distributed on both sides of the lateral direction through the second adhesive layer 3 and the third adhesive layer 4. The upper edge 201 of the front leak-proof sheet 26 is bonded to the upper edge 201 of the hydrophilic nonwoven fabric 21 through the fourth adhesive layer 5, so that a front bag 32 with a first opening 31 is formed between the front leak-proof sheet 26, the two first three-dimensional protective barriers 28 and the liquid-permeable surface layer 11. The left edge 203 and right edge 204 of the rear leak-proof sheet 27 are connected to the first three-dimensional protective barriers 28 distributed on both sides of the lateral direction through the second adhesive layer 3 and the third adhesive layer 4. The fifth adhesive layer 6 and the sixth adhesive layer 7 are respectively bonded to the second three-dimensional protective barrier 29 distributed on both sides of the lateral direction. The lower edge 202 of the rear leak-proof sheet 27 is bonded to the lower edge 202 of the hydrophilic nonwoven fabric 21 through the seventh adhesive layer 8, so that a rear bag 34 with a second opening 33 is formed between the rear leak-proof sheet 27, the two second three-dimensional protective barriers 29 and the liquid-permeable surface layer 11. The middle part of the lateral sides of the rear leak-proof sheet 27 is provided with an eighth adhesive layer 9 for bonding with the first three-dimensional protective barrier 28 and the hydrophilic nonwoven fabric 21.

[0028] This leak-proof baby diaper utilizes hydrophilic nonwoven fabric 21, hydrophobic nonwoven fabric 22, first leak-proof elastic band 23, and second leak-proof elastic band 24 to form a first three-dimensional protective barrier 28 and a second three-dimensional protective barrier 29, respectively. This enhances the leak-proof performance of the sides and effectively solves the problem in the prior art where uneven pressure distribution of the elastic bands in the three-dimensional protective barrier leads to gaps and easy leakage of liquid from the sides. At the same time, a front leak-proof sheet 26 and a rear leak-proof sheet 27 are provided, which, together with the first three-dimensional protective barrier 28, the second three-dimensional protective barrier 29, and the liquid-permeable surface layer 11, form a front pocket 32 ​​and a rear pocket 34, respectively, further improving the side leakage prevention effect. Moreover, this structure can better adapt to the dynamic activity needs of users of different body types and reduce the risk of liquid leakage.

[0029] Specifically, the rear leak-proof sheet 27 includes an upper layer 271, a lower layer 272, two first elastic bands 273, and five second elastic bands 274. The first elastic bands 273 are bonded between the upper layer 271 and the lower layer 272 and are distributed at the upper edge 201 of the rear leak-proof sheet 27. Each of the second elastic bands 274 is bonded between the upper layer 271 and the lower layer 272 and is distributed between the seventh adhesive layer 8 and the eighth adhesive layer 9. Each of the second elastic bands 274 is distributed in the transverse direction. The rear leak-proof sheet 27 utilizes the upper layer... 271, lower layer 272 and elastic band structure with different distributions, the first elastic band 273 is distributed on the upper edge 201 of the back leak-proof piece 27, and five second elastic bands 274 are distributed between the seventh glue layer 8 and the eighth glue layer 9 and are distributed in the transverse direction. This structure makes the back leak-proof piece 27 have better elasticity and fit, and can better adjust its shape according to the user's leg movements, further enhancing the leak-proof effect, while improving the user's wearing comfort, and keeping the second opening 33 of the back pocket 34 open, so as to accommodate feces and other excrement.

[0030] Furthermore, the stretch ratio of the second elastic band 274 is greater than that of the first elastic band 273. This design allows the back anti-leakage patch 27 to have different elastic properties in different parts. The second elastic band 274 between the seventh adhesive layer 8 and the eighth adhesive layer 9 has a large stretch ratio, which can better adapt to the large range of leg movements and provide a tighter fit. Meanwhile, the stretch ratio of the first elastic band 273 at the upper edge is relatively small, which ensures a certain fit without causing excessive restraint to the user, thus improving the overall user experience.

[0031] Furthermore, the front leak-proof flap 26 includes a first layer 261 and two third elastic bands 262. The third elastic bands 262 are bonded to the lower longitudinal side of the first layer 261 and are folded and covered by the lower edge 202 of the first layer 261. This structure gives the front leak-proof flap 26 a certain degree of elasticity, allowing it to better fit the user's body and form an effective leak-proof barrier at the front to prevent liquid from leaking from the front. At the same time, it improves the structural stability and durability of the front leak-proof flap 26 and keeps the first opening 31 of the front pocket 32 ​​open.

[0032] Meanwhile, the longitudinal length of the absorbent core layer 12 is smaller than that of the liquid-permeable surface layer 11, and the upper edge 201 of the absorbent core layer 12 is aligned with the upper edge 201 of the liquid-permeable surface layer 11, so that an expansion cavity 20 is formed between the lower edge 202 of the absorbent core layer 12 and the lower edge 202 of the liquid-permeable surface layer 11. The expansion cavity 20 can provide a larger storage space for excess feces and other excrement after the absorbent core layer 12 absorbs a certain amount of liquid, while preventing liquid from overflowing due to saturation of the absorbent core layer 12, further enhancing the leak-proof performance of the diaper, without affecting the overall wearing comfort.

[0033] Furthermore, the longitudinal center of the first three-dimensional protective enclosure 28 is compositely connected to the upper surface of the hydrophilic nonwoven fabric 21 through the ninth adhesive layer 10, and the ninth adhesive layer 10 does not cover the first leak-proof elastic band 23. This connection method not only ensures the stable connection between the first three-dimensional protective enclosure 28 and the hydrophilic nonwoven fabric 21, but also does not affect the elasticity of the first leak-proof elastic band 23, so that the first three-dimensional protective enclosure 28 can better play its leak-proof role, while maintaining its good fit and adaptability.

[0034] In this embodiment, a second leak-proof pad 30 is provided at the longitudinal center of the upper surface of the liquid-impermeable bottom layer 13 and below the second three-dimensional guard 29, which increases the leak-proof capability of the liquid-impermeable bottom layer 13. When a small amount of liquid permeates through the second three-dimensional guard 29, the second leak-proof pad 30 can absorb the liquid and prevent it from further penetrating into the wearer's pants, thereby further improving the overall leak-proof performance of the diaper. In addition, the second leak-proof pad 30 can increase the tension of the crotch area 102, so that the area is in an expanded state, avoiding excessive contact with the skin, and improving the comfort and absorption efficiency.

[0035] Furthermore, both the first leak-proof pad 25 and the second leak-proof pad 30 include bulky nonwoven fabric and superabsorbent polymer particles sprinkled on the bulky nonwoven fabric. The bulky nonwoven fabric has good air permeability and liquid conductivity, which can quickly disperse liquid onto the superabsorbent polymer particles. The superabsorbent polymer particles have strong water absorption and retention capabilities, which can absorb and lock in a large amount of liquid, preventing liquid backflow, thereby effectively improving the leak-proof and liquid absorption performance of the leak-proof pad. Alternatively, the pad can be a mixture of fluff pulp and superabsorbent polymer particles wrapped in nonwoven fabric.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A leak-proof baby diaper, characterized by: The diaper body includes a longitudinal direction extending along a length direction of the diaper body, and a transverse direction extending along a width direction of the diaper body, the diaper body has a front waist region, a crotch region and a back waist region distributed in sequence along the longitudinal direction, the diaper body includes a liquid-permeable surface layer, an absorbent core layer and a liquid-impermeable bottom layer arranged in sequence from top to bottom, the liquid-permeable surface layer, the absorbent core layer and the liquid-impermeable bottom layer all have upper edges and lower edges distributed at both ends of the longitudinal direction, and left edges and right edges distributed at both ends of the transverse direction; The liquid-permeable surface layer includes a hydrophilic non-woven fabric, two hydrophobic non-woven fabrics, a first leakage prevention rubber band, a second leakage prevention rubber band, a first leakage prevention pad, a front leakage prevention sheet and a back leakage prevention sheet, the hydrophilic non-woven fabric covers an upper surface of the absorbent core layer, and the transverse sides of the hydrophilic non-woven fabric are folded downward on the transverse sides of the absorbent core layer, the two hydrophobic non-woven fabrics are distributed on the transverse sides of the hydrophilic non-woven fabric, and the transverse middle part of the hydrophobic non-woven fabric is connected with the transverse sides of the hydrophilic non-woven fabric and the liquid-impermeable bottom layer through a first glue layer, the first leakage prevention rubber band is arranged on the transverse inner side of the hydrophobic non-woven fabric and is folded and covered through the transverse inner end of the hydrophobic non-woven fabric to form a first three-dimensional containment, the second leakage prevention rubber band and the first leakage prevention pad are arranged on the transverse outer side of the hydrophobic non-woven fabric and are folded and covered through the transverse outer end of the hydrophobic non-woven fabric to form a second three-dimensional containment, and the second leakage prevention rubber band is distributed on the transverse outer side of the first leakage prevention pad; The left edge and the right edge of the front leakage prevention sheet are connected with the first three-dimensional containment distributed on the transverse sides through a second glue layer and a third glue layer respectively, the upper edge of the front leakage prevention sheet is connected with the upper edge of the hydrophilic non-woven fabric through a fourth glue layer, so that the front leakage prevention sheet, the two first three-dimensional containments and the liquid-permeable surface layer form a front bag with a first opening, the left edge and the right edge of the back leakage prevention sheet are connected with the second three-dimensional containment distributed on the transverse sides through a fifth glue layer and a sixth glue layer respectively, and the lower edge of the back leakage prevention sheet is connected with the lower edge of the hydrophilic non-woven fabric through a seventh glue layer, so that the back leakage prevention sheet, the two second three-dimensional containments and the liquid-permeable surface layer form a back bag with a second opening, and the middle part of the transverse sides of the back leakage prevention sheet is provided with an eighth glue layer for being connected with the first three-dimensional containment and the hydrophilic non-woven fabric.

2. The leak-proof baby diaper according to claim 1, characterized in that: The back leakage prevention sheet includes an upper sheet layer, a lower sheet layer, at least one first rubber band and at least three second rubber bands, the first rubber band is connected between the upper sheet layer and the lower sheet layer and is distributed on the upper edge of the back leakage prevention sheet, each second rubber band is connected between the upper sheet layer and the lower sheet layer and is distributed between the seventh glue layer and the eighth glue layer, and each second rubber band is distributed along the transverse direction.

3. The leak-proof baby diaper according to claim 2, characterized in that: The stretch ratio of the second rubber band is greater than the stretch ratio of the first rubber band.

4. The leak-proof baby diaper according to claim 1, characterized in that: The front leakage prevention sheet includes a first sheet layer and at least one third rubber band, the third rubber band is connected to the longitudinal lower side of the first sheet layer and is folded and covered through the lower edge of the first sheet layer.

5. The leak-proof baby diaper according to any one of claims 1 to 4, characterized in that: The longitudinal length dimension of the absorbent core layer is less than that of the liquid permeable surface layer, and the upper edge of the absorbent core layer is aligned with the upper edge of the liquid permeable surface layer, so that an expansion cavity is formed between the lower edge of the absorbent core layer and the lower edge of the liquid permeable surface layer.

6. The leakproof baby diaper according to claim 5, characterized in that: The longitudinal middle part of the first three-dimensional containment is connected to the upper surface of the hydrophilic non-woven fabric through the ninth glue layer, and the ninth glue layer is not covered on the first leakage prevention rubber.

7. The leakproof baby diaper according to claim 6, characterized in that: The upper surface of the longitudinal middle part of the liquid impermeable bottom layer and on the lower side of the second three-dimensional containment is provided with a second leakage prevention pad layer.

8. The leakproof baby diaper according to claim 7, characterized in that: The first leakage prevention pad layer and the second leakage prevention pad layer each comprise a bulky non-woven fabric and high molecular water-absorbing resin particles or fluff pulp mixed with high molecular water-absorbing resin particles.

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