Water-absorbing composite nonwoven fabric for paper diaper

Abstract

The application provides a water-absorbing type composite non-woven fabric for a paper diaper, which comprises a non-woven fabric and a base cloth, the non-woven fabric and the base cloth are connected and form a containing gap, a plurality of flow guide strips are arranged on the base cloth at intervals, a plurality of first cutouts and second cutouts are arranged on the non-woven fabric at intervals, the first cutouts and the second cutouts are staggered on the non-woven fabric, when liquid is on the non-woven fabric, the liquid can flow along the tracks of the first cutouts or the second cutouts, thereby uniformly permeating around the non-woven fabric, and the liquid can be added to the base cloth through the first cutouts and the second cutouts at a speed, when the liquid is on the base cloth, part of the liquid is adsorbed by the flow guide strips, and the other part moves along the tracks of the flow guide strips, and part of the liquid is absorbed by the base cloth during the movement, through the arrangement of the non-woven fabric and the base cloth, the water-absorbing effect of the non-woven fabric used for the paper diaper is realized.

Description

Technical Field

[0001] This application relates to the field of nonwoven fabric technology, and more particularly to an absorbent composite nonwoven fabric for use in diapers. Background Technology

[0002] In the structure of disposable diapers, the surface layer that comes into direct contact with the skin is usually made of non-woven fabric. However, some existing disposable diapers reduce the amount of hydrophilic additives to improve the breathability and dryness of the non-woven fabric. Furthermore, the non-woven fabric itself lacks a structure for guiding liquid flow. This can easily lead to urine not being quickly absorbed by the surface layer and guided to the absorbent core below. As a result, the liquid stays between the skin and the surface layer for a significantly longer time, which can easily affect the baby's skin. In addition, being damp for a long time can cause discomfort for the wearer. Utility Model Content

[0003] The purpose of this invention is to provide an absorbent composite nonwoven fabric for diapers to solve the above-mentioned problems.

[0004] The technical solution of this application is implemented as follows:

[0005] This application provides a water-absorbing composite nonwoven fabric for diapers, including a nonwoven fabric and a base fabric. The nonwoven fabric is connected to the base fabric around its perimeter, forming an accommodating gap between the nonwoven fabric and the base fabric. A guide strip is disposed on the base fabric, and the guide strip is located within the accommodating gap. Several guide strips are disposed and spaced apart along the length direction of the base fabric, and one end of the guide strip abuts against the end face of the nonwoven fabric.

[0006] The base fabric has a groove on the side facing the nonwoven fabric, and there are two sets of grooves symmetrically distributed at both ends of the base fabric.

[0007] The nonwoven fabric has several spaced-apart first and second cuts, which are interspersed on the nonwoven fabric.

[0008] The first and second cuts work together to connect the accommodating gap with the outside of the nonwoven fabric.

[0009] In one embodiment, the first and second cuts form a plurality of evenly distributed contact pads on the nonwoven fabric, and the contact pads have overflow holes penetrating the nonwoven fabric.

[0010] The overflow hole connects the accommodating gap to the outside.

[0011] In one embodiment, a groove is provided on the side of the nonwoven fabric facing the base fabric at the position corresponding to the groove, and several water-absorbing and swelling particles are provided in the groove at intervals.

[0012] When the nonwoven fabric is connected to the base fabric, the water-absorbing and swelling particles are located between the groove and the recess.

[0013] In one embodiment, a flow area is formed between two adjacent sets of guide strips, and the two ends of the guide strips extend to the groove portion, so that the flow area is connected to the interior of the groove portion.

[0014] In one embodiment, the diameter of the overflow hole gradually decreases from one side toward the other side toward the base fabric.

[0015] In one embodiment, micropores are uniformly distributed on the base fabric, and the micropores are located between the guide strips.

[0016] In one embodiment, the base fabric and the guide strip are made of cotton fibers.

[0017] The advantages or beneficial effects of the above technical solutions include at least the following:

[0018] This application discloses a water-absorbing composite nonwoven fabric for diapers. The nonwoven fabric has several first and second slits. Because these slits are interwoven and penetrate the nonwoven fabric, when the nonwoven fabric comes into contact with liquid, the liquid can penetrate the base fabric through either the first or second slit. The interweaving of the first and second slits allows the liquid to be evenly dispersed along the slit trajectory during flow, preventing liquid accumulation in the same location. Furthermore, the base fabric has several spaced-apart guide strips. When liquid enters the base fabric, it comes into contact with and is absorbed by the guide strips. Simultaneously, some liquid flows along the guide strip trajectory into the grooves in the base fabric, where it is collected from the side, preventing overflow. During flow, the liquid comes into contact with the base fabric and is partially absorbed. Through the cooperation of the nonwoven fabric and the base fabric, the overall absorbency is improved, thus solving the problem of low absorbency in existing nonwoven fabrics, which leads to liquid accumulation and discomfort. Attached Figure Description

[0019] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0020] Figure 1 An exploded structural diagram of the composite nonwoven fabric according to an embodiment of this application is shown;

[0021] Figure 2 A cross-sectional structural diagram of the composite nonwoven fabric according to an embodiment of this application is shown;

[0022] Figure 3 A structural schematic diagram of the nonwoven fabric according to an embodiment of this application is shown;

[0023] Figure 4A schematic diagram of the base fabric of an embodiment of this application is shown;

[0024] Figure 5 Examples of this application are presented. Figure 2 Enlarged view of point A in the middle;

[0025] Reference numerals: 1. Non-woven fabric; 11. First cut; 12. Second cut; 13. Contact pad; 131. Overflow hole; 14. Groove; 2. Base fabric; 21. Guide strip; 22. Groove; 23. Micropore; 3. Water-absorbing and expanding particles. Detailed Implementation

[0026] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0027] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0029] It should be noted that the terms "a" and "several" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0030] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0031] Reference Figures 1-5A water-absorbing composite nonwoven fabric for diapers includes a nonwoven fabric 1 and a base fabric 2. The nonwoven fabric 1 is connected to the base fabric 2 around its perimeter, forming an accommodating gap between the nonwoven fabric 1 and the base fabric 2. A guide strip 21 is disposed on the base fabric 2, and the guide strip 21 is located within the accommodating gap. Several guide strips 21 are disposed and spaced apart along the length direction of the base fabric 2. One end of the guide strip 21 abuts against the end face of the nonwoven fabric 1. The perimeter of the nonwoven fabric 1 is connected to the base fabric 2 by heat pressing. This connection method creates a relatively closed space, namely the accommodating gap. When the diaper absorbs liquid, the liquid will first be temporarily stored in the accommodating gap, and then further transferred and absorbed through other structures.

[0032] The base fabric 2 has a groove 22 on the side facing the nonwoven fabric 1. Two sets of grooves 22 are symmetrically distributed at both ends of the base fabric 2. The grooves 22 enhance the absorbency of the diaper in several ways. Firstly, they act as a liquid collection area. When liquid flows along the guide strip 21, it eventually flows to the grooves 22. Furthermore, the recessed design of the grooves 22 concentrates the liquid, thus preventing the risk of side leakage.

[0033] The nonwoven fabric 1 has several spaced-apart first slits 11 and second slits 12, which are staggered on the nonwoven fabric 1 and connected to each other. Through the cooperation of the first slits 11 and second slits 12, communication is achieved between the accommodating gap and the outside of the nonwoven fabric 1. This communication breaks the airtightness of the nonwoven fabric 1, providing a direct channel for liquid to enter the accommodating gap. When liquid comes into contact with the surface of the nonwoven fabric 1, it can quickly penetrate into the accommodating gap through the staggered slits, greatly accelerating the absorption rate of the liquid. At the same time, the spaced-apart slit design ensures the structural strength of the nonwoven fabric 1, preventing damage due to too many or too dense slits, thus affecting its normal use. In addition, the staggered slits can also disperse the liquid to a certain extent, allowing the liquid to be more evenly distributed after entering the accommodating gap.

[0034] By combining the first cut 11 and the second cut 12, the accommodating gap is connected to the outside of the nonwoven fabric 1, thereby improving the overall water absorption effect of the nonwoven fabric 1.

[0035] The base fabric 2 and the diversion strip 21 are made of cotton fibers. Cotton fibers have good absorbency and breathability. As the material of the base fabric 2, it can quickly absorb the liquid that seeps through the overflow hole 131. At the same time, the breathability of cotton fibers allows the area under the base fabric 2 to maintain a certain air circulation, reducing skin discomfort caused by dampness and stuffiness, and improving the overall comfort of the diaper. Furthermore, since the diversion strip 21 is made of cotton fibers, it not only has the same absorbency as the base fabric 2 and can better guide the flow of liquid, but also, due to the softness of cotton fibers, reduces the friction and irritation to the skin when the diversion strip 21 comes into contact with the non-woven fabric 1.

[0036] Based on the above structure, when the liquid is on the nonwoven fabric 1, some of the liquid will enter the accommodating gap formed between the nonwoven fabric 1 and the base fabric 2 through the first cut 11 or the second cut 12 during flow. The first cut 11 and the second cut 12 are staggered, and the liquid will flow along the trajectory between the first cut 11 and the second cut 12, thereby dispersing the liquid flow and increasing the penetration rate of the liquid from the nonwoven fabric 1. Furthermore, when the liquid is on the base fabric 2, some of the liquid will contact the guide strip 21, thus... The liquid is absorbed by the guide strip 21, and some of the liquid will flow along the trajectory of the guide strip 21, so that the liquid collects in the groove 22 provided in the base fabric 2. During the flow process, some of the liquid will also be adsorbed by the base fabric 2 and the guide strip 21. Through the first cut 11 and the second cut 12 provided in the nonwoven fabric 1 and the guide strip 21 provided in the base fabric 2, the liquid is adsorbed at different positions, thereby improving the overall water absorption effect of the nonwoven fabric 1 and avoiding the problem of liquid accumulation on the nonwoven fabric 1, which leads to slow water absorption.

[0037] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 5 The first cut 11 and the second cut 12 form several evenly distributed contact pads 13 on the nonwoven fabric 1. The contact pads 13 have overflow holes 131 that penetrate the nonwoven fabric 1. The contact pads 13 are arranged on the nonwoven fabric 1 with a uniform spacing and layout. The uniform distribution design allows it to form a wider and more uniform contact with the skin surface, avoiding skin discomfort or damage caused by excessive pressure in local areas, and greatly improving the wearer's comfort.

[0038] The overflow hole 131 connects the accommodating gap to the outside. During use, after the liquid is absorbed, an accommodating gap is formed between the nonwoven fabric 1 and the base fabric 2. The presence of the overflow hole 131 allows the accommodating gap to be directly connected to the outside. When the liquid reaches the contact pad 13, it will quickly flow into the accommodating gap through the overflow hole 131 and diffuse to the outside. This design speeds up the liquid transfer, avoids the liquid from lingering on the surface of the contact pad 13, reduces the contact time between the liquid and the skin, and makes the water absorption and flow conduction performance of the entire nonwoven fabric 1 more balanced, thereby improving the overall efficiency of the diaper in absorbing liquid.

[0039] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 5 The nonwoven fabric 1 has a groove 14 on the side facing the base fabric 2, corresponding to the groove 22. Several water-absorbing and swelling particles 3 are arranged in the groove 22 at intervals. The water-absorbing and swelling particles 3 are high water-absorbing resin particles in the prior art.

[0040] When the nonwoven fabric 1 is connected to the base fabric 2, the absorbent and expandable particles 3 are located between the groove 14 and the recess 22. These particles 3 have the property of expanding upon contact with water. When liquid permeates through the nonwoven fabric 1 to the groove 14, it comes into contact with the particles 3. After absorbing the liquid, the particles 3 expand rapidly, increasing their volume and thus absorbing and storing more liquid, thereby increasing the absorbency of the diaper. Simultaneously, the spaced particles, after expanding, compress each other to form a denser structure, which helps prevent liquid backflow and ensures that the liquid is effectively locked within the recess 22 area. The groove 14 provides a channel for the absorbent and expandable particles 3 to contact the liquid, allowing the particles to fully exert their absorbent function, while the recess 22 provides a space to accommodate the particles, preventing them from scattering or shifting during use. This design not only enhances the absorbency of the diaper but also improves its water-locking performance, reducing the risk of side leakage.

[0041] In one embodiment, reference is made to Figure 1 and Figure 4 A flow area is formed between two adjacent sets of guide strips 21. Both ends of the guide strips 21 extend to the grooves 22, connecting the flow area with the interior of the grooves 22. When liquid is absorbed by the nonwoven fabric 1, it first enters the flow area between the guide strips 21. Because both ends of the guide strips 21 are connected to the grooves 22, the liquid flows rapidly towards the grooves 22 along the guiding direction of the guide strips 21 within the flow area. This high liquid transfer efficiency avoids the slow diffusion or stagnation of liquid on the surface of the base fabric 2. Furthermore, the connection between the flow area and the grooves 22 allows the liquid to directly reach the area containing the water-absorbing and expanding particles 3, enabling the particles to absorb the liquid promptly and fully utilize their water-absorbing and expanding function.

[0042] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 5 The diameter of the overflow hole 131 gradually decreases from one side to the other side of the base fabric 2. The cross-section of the overflow hole 131 forms a funnel-shaped structure that is larger at the bottom and smaller at the top. When liquid passes through the overflow hole 131, the gradually decreasing diameter structure will guide the liquid. The larger diameter on the outside facilitates the liquid to enter the overflow hole 131 quickly, while the smaller diameter on the inside increases the speed of the liquid when it passes through, forming a certain pressure difference, which makes the liquid flow towards the base fabric 2 more quickly. This design effectively prevents liquid backflow and ensures that the liquid can only be transferred from the surface of the nonwoven fabric 1 to the base fabric 2, avoiding the backflow of the absorbed liquid to the skin contact surface.

[0043] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 4 The base fabric 2 has micropores 23 evenly distributed on it, located between the guide strips 21. The pore diameter of the micropores 23 is smaller than that of the overflow hole 131. The micropores 23 are arranged in the area between the guide strips 21 so that when the liquid flows through the area guided by the guide strips 21, it can penetrate into the absorbent layer below the base fabric 2 through the micropores 23. The micropores 23 have a smaller pore diameter than the overflow hole 131. This design has a dual function. On the one hand, the smaller pore diameter can prevent larger liquids or water-absorbing and swelling particles 3 from entering the area above the base fabric 2 through the micropores 23, which plays a role in isolation. On the other hand, the micropores 23 are evenly distributed between the guide strips 21, so they will not affect the guiding effect of the guide strips 21 on the liquid. At the same time, the liquid can penetrate evenly into all areas of the base fabric 2, avoiding the absorption saturation problem caused by concentrated liquid penetration in local areas. This combination design makes the liquid distribution on the base fabric 2 more uniform, improves the overall water absorption and storage capacity of the base fabric 2, and further enhances the performance of the diaper.

[0044] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. A water-absorbing composite nonwoven fabric for diapers, characterized in that: The device includes a nonwoven fabric and a base fabric. The nonwoven fabric is connected to the base fabric around its perimeter, forming an accommodating gap between the nonwoven fabric and the base fabric. A guide strip is disposed on the base fabric and is located within the accommodating gap. Several guide strips are disposed and spaced apart along the length of the base fabric. One end of each guide strip abuts against the end face of the nonwoven fabric. The base fabric has a groove on the side facing the nonwoven fabric, and the groove is provided in two sets and symmetrically distributed at both ends of the base fabric. The nonwoven fabric has several spaced-apart first and second cuts, which are interspersed on the nonwoven fabric. The first and second cuts work together to make the accommodating gap communicate with the outside of the nonwoven fabric.

2. The absorbent composite nonwoven fabric for diapers according to claim 1, characterized in that: The first cut and the second cut form several evenly distributed contact pads on the nonwoven fabric, and the contact pads have overflow holes that penetrate the nonwoven fabric; The overflow hole allows the accommodating gap to communicate with the outside.

3. The absorbent composite nonwoven fabric for diapers according to claim 1, characterized in that: The nonwoven fabric has a groove on the side facing the base fabric corresponding to the groove, and several water-absorbing and expanding particles are arranged at intervals in the groove. When the nonwoven fabric is connected to the base fabric, the water-absorbing and swelling particles are located between the slot and the groove.

4. The absorbent composite nonwoven fabric for diapers according to claim 1, characterized in that: A flow area is formed between two adjacent sets of the guide strips, and the two ends of the guide strips extend to the groove portion, so that the flow area is connected to the interior of the groove portion.

5. The absorbent composite nonwoven fabric for diapers according to claim 2, characterized in that: The diameter of the overflow hole gradually decreases from the side facing the base fabric to the other side.

6. The absorbent composite nonwoven fabric for diapers according to claim 1, characterized in that: The base fabric has micropores evenly distributed on it, and the micropores are located between the flow guide strips.

7. The absorbent composite nonwoven fabric for diapers according to claim 1, characterized in that: The base fabric and the guide strip are made of cotton fibers.

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