Composite core paper diaper with core supporting structure

Abstract

The utility model relates to the technical field of paper diaper products, in particular to a composite core paper diaper with a core supporting structure, which comprises a surface layer, an absorption core and a bottom layer which are stacked, and is characterized in that two elastic supporting layers are adhered to the bottom of the absorption core and are symmetrically distributed along the center of the paper diaper; a hollow area for absorbing swelling of the core is formed between the two elastic supporting layers; a water repellent piece extending along the center of the paper diaper is arranged between the surface layer and the absorption core, a flow guide layer used for guiding liquid in the transverse direction of the paper diaper is arranged at the upper end of the water repellent piece, and the two transverse sides of the flow guide layer extend out of the side ends of the water repellent piece. The paper diaper with the composite core solves the problem that an existing paper diaper with the composite core is insufficient in supporting performance for the core.

Description

Technical Field

[0001] This utility model relates to the technical field of diaper products, specifically to a composite core diaper with a core support structure. Background Technology

[0002] Existing diaper products often employ multi-layered composite core structures to achieve high overall absorbency and ensure backflow prevention. For example, Chinese patent application CN 118892399 A proposes a multi-layered core diaper. This diaper's multi-layered core includes a conductive layer and an absorbent layer. The absorbent layer, from top to bottom, comprises a skin-care layer, a support layer, and a reinforcing layer. The skin-care layer consists of several parallel non-woven fabrics, with several absorbent and skin-care chambers alternately arranged between adjacent non-woven fabrics. The absorbent chambers contain highly absorbent resin, and each surface of the skin-care chamber is a diaphragm containing wood pulp. The skin-care chamber contains a skin-care substance. The support layer is made of polyester fiber, and the reinforcing layer contains highly absorbent resin.

[0003] This composite core uses a combination of high-absorbency and high-expansion absorbent resins. The absorbent resin expands after absorbing liquid. For infants and young children, the expanded diaper will sag when worn, and the center of the diaper product will deform significantly, affecting the overall support of the diaper product. Utility Model Content

[0004] Therefore, this utility model provides a composite core diaper with a core support structure, which solves the problem of insufficient support for the core in existing composite core diapers.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A composite core diaper with a core support structure is defined as having a longitudinal direction in the length direction and a transverse direction in the width direction when the diaper is flattened. The diaper includes a top layer, an absorbent core and a bottom layer stacked together. Two elastic support layers are bonded to the bottom of the absorbent core. The two elastic support layers are symmetrically distributed along the center of the diaper, and a hollow area for the absorbent core to expand is formed between the two elastic support layers.

[0007] A water-repellent sheet extending along the center of the diaper is provided between the surface layer and the absorbent core. A flow-guiding layer for guiding liquid laterally along the diaper is provided at the upper end of the water-repellent sheet, and the side ends of the water-repellent sheet extend from both sides of the flow-guiding layer.

[0008] Preferably, the absorbent core includes an upper absorbent layer, a lower absorbent layer, and an outer coating layer. The upper absorbent layer is composed of high-expansion water-absorbing resin and fluff pulp, and the lower absorbent layer is composed of multiple spaced-apart high-expansion water-absorbing resin strips.

[0009] Preferably, the flow guiding layer has a plurality of flow guiding grooves extending laterally, and the water-repellent plate partially overlaps with the flow guiding grooves.

[0010] Preferably, the elastic support layer is an elastic nonwoven fabric.

[0011] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0012] This technical solution addresses current composite core diaper products by designing a structural support for the absorbent core. It employs elastic support layers located on both sides of the bottom of the absorbent core, providing sufficient support after expansion. Simultaneously, a hollowed-out area is designed in the center of the absorbent core to allow for expansion, preventing the pressure leakage caused by compression of the absorbent core, as is common with traditional single-piece support sheets. A water-repellent sheet is designed in the center of the diaper, working in conjunction with the upper guide layer. This allows the diaper to absorb liquid and then guide it laterally to both sides. This ensures that liquid absorption proceeds gradually from the sides towards the center, with the sides of the absorbent core absorbing and expanding first. Only after the elastic support layers on both sides provide support and the support structure is stable does the center of the absorbent core absorb and expand, ensuring uniform absorption, reducing material waste during use, and preventing localized expansion that could affect the shape. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the layered structure of the diaper according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the diaper when unfolded according to an embodiment of the present invention.

[0015] Reference numerals: 1. Top layer; 2. Absorbent core; 21. Outer covering layer; 22. Upper absorbent layer; 23. Lower absorbent layer; 24. Sheet; 3. Bottom layer; 4. Elastic support layer; 41. Hollowed-out area; 5. Water-repellent sheet; 51. Guide layer; 511. Guide channel. Detailed Implementation

[0016] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0017] refer to Figure 1 and Figure 2A composite core diaper with a core support structure is defined as having a longitudinal direction in the length direction and a transverse direction in the width direction when the diaper is flattened. The diaper includes a top layer 1, an absorbent core 2, and a bottom layer 3 stacked together. Two elastic support layers 4 are bonded to the bottom of the absorbent core 2. The two elastic support layers 4 are symmetrically distributed along the center of the diaper, and a hollow area 41 for the expansion of the absorbent core 2 is formed between the two elastic support layers 4. Structurally, the elastic support layer 4 is made of elastic non-woven fabric commonly used in hygiene products. It has a certain degree of elasticity and is easy to apply adhesive and position transfer processes. It can also achieve auxiliary liquid absorption or liquid blocking through hydrophilic and water-repellent treatments, and has strong flexibility in the fit of the composite core.

[0018] A water-repellent sheet 5 extending along the center of the diaper is provided between the surface layer 1 and the absorbent core 2. A flow-guiding layer 51 for guiding liquid laterally along the diaper is provided at the upper end of the water-repellent sheet 5. The side ends of the water-repellent sheet 5 extend from both sides of the flow-guiding layer 51. This technical solution addresses current composite core diaper products by designing a structural support for the absorbent core 2. It employs elastic support layers 4 located on both sides of the bottom of the absorbent core 2, providing sufficient support after expansion. Simultaneously, a hollow area 41 is designed at the center of the absorbent core 2 to allow for expansion, preventing the traditional single-piece support structure from causing compression and leakage. A water-repellent sheet 5 is designed at the center of the diaper, working in conjunction with the upper guide layer 51. This allows the liquid to be guided laterally to both sides after the diaper absorbs it initially. Thus, during absorption, the liquid gradually penetrates from the sides towards the center. The sides of the absorbent core 2 absorb liquid and expand first, and only after the elastic support layers 4 on both sides provide support and the support structure is stable does the center of the absorbent core 2 absorb liquid and expand. This ensures uniform absorption, reduces material waste during use, and avoids localized expansion that could affect the shape.

[0019] Structurally, to further improve the above-mentioned effect, the absorbent core 2 is designed to include an upper absorbent layer 22, a lower absorbent layer 23, and an outer covering layer 21. The upper absorbent layer 22 is composed of high-expansion water-absorbing resin and fluff pulp, and the lower absorbent layer 23 is composed of multiple spaced high-expansion water-absorbing resin longitudinal strips. In the specific molding process, a sheet 24 for spacing is arranged between the upper absorbent layer 22 and the lower absorbent layer 23. The sheet 24 is coated with a corresponding adhesive, and then the cutting position is adjusted according to the requirements to form a double-layer absorbent core 2 structure with separation, which is then wrapped by the outer covering layer 21.

[0020] In this embodiment, the flow guiding layer 51 has several flow guiding grooves 511 extending laterally, and the water-repellent sheet 5 partially overlaps with the flow guiding grooves 511. The flow guiding grooves 511 are straight, hollow groove structures that extend laterally, guiding the liquid laterally and gradually seeping downwards; and structurally, the liquid partially contacts the water-repellent sheet 5 during the seepage process, avoiding direct contact with the center of the absorbent core 2, thereby ensuring the product design requirement of first absorbing liquid and expanding on both sides and then absorbing liquid in the center.

[0021] This technical solution is not limited to diaper products with composite cores, but can also be applied to sanitary napkin products such as diapers, or pull-up diapers with closed waistbands.

[0022] Although the present 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 present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A composite core paper diaper having a core support structure, defining a longitudinal direction of a length and a transverse direction of a width in a flat state of the paper diaper, the paper diaper comprising a topsheet (1), an absorbent core (2) and a backsheet (3) arranged in a stack, characterized in that: The bottom of the absorbent core (2) is adhered with two elastic support layers (4), the two elastic support layers (4) are symmetrically distributed along the center of the diaper, and a hollow area (41) for expansion of the absorbent core (2) is formed between the two elastic support layers (4); A water-repellent sheet (5) extending along the center of the diaper is arranged between the surface layer (1) and the absorbent core (2), the upper end of the water-repellent sheet (5) is provided with a flow guide layer (51) for guiding liquid along the transverse direction of the diaper, and the transverse sides of the flow guide layer (51) extend out of the side ends of the water-repellent sheet (5).

2. The composite core paper diaper with core support structure according to claim 1, characterized in that: The absorbent core (2) comprises an upper absorbent layer (22), a lower absorbent layer (23) and an outer cover layer (21), the upper absorbent layer (22) is composed of high-multiplying water-absorbing resin and fluff pulp, and the lower absorbent layer (23) is composed of a plurality of longitudinally distributed high-expansion water-absorbing resin strips.

3. The composite core paper diaper with core support structure according to claim 1, characterized in that: A plurality of flow guide grooves (511) extending along the transverse direction are arranged on the flow guide layer (51), and the water-repellent sheet (5) and the flow guide grooves (511) partially overlap.

4. The composite core paper diaper with core support structure according to claim 1 or 2 or 3, characterized in that: The elastic support layer (4) is an elastic non-woven fabric.

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