Puffed cotton structure for disposable sanitary core and disposable sanitary material

Abstract

The utility model provides a disposable sanitary material core body uses fluffy cotton structure and disposable sanitary material, include: the fluffy layer and the support layer of up and down distribution and mutual connection, wherein, fluffy layer is the fluffy state of fibre is in disorderly arrangement, the support layer is the lamella or thin net shape of fibre is in the forward arrangement, the utility model discloses adopt multilayer structure, give consideration to high softness, high fluffy degree and high strength, its not only soft fluffy texture, the comfort degree is good, and the machine is not easy to deform, and the support force of good high molecular particle, solved the single layer fluffy cotton structure texture thick and heavy, the machine is easy to deform, the softness is poor, high molecular particle easy leakage etc. technical problem of existing technology.

Description

Technical Field

[0001] This utility model relates to the field of absorbent sanitary products technology, and in particular to a fluffy cotton structure for disposable sanitary product cores and disposable sanitary products. Background Technology

[0002] Disposable absorbent hygiene products, such as baby diapers, feminine hygiene pads, and adult incontinence products, have become necessities in modern life. Their basic structure typically includes: a skin-friendly non-woven fabric surface layer, a diversion layer, an absorbent core layer, and a leak-proof bottom layer, and may be supplemented with components such as three-dimensional leak-proof side panels, elastic waistbands, and Velcro.

[0003] Chinese patent CN202010459499.8 discloses a diaper core, which includes a multi-layer absorbent core with an H-shaped channel formed on it. The absorbent core has a 5-layer structure, consisting of: a first covering layer, a first polymer layer, a fluffy cotton layer, a second polymer layer, and a second covering layer. The fluffy cotton layer is located between the first and second polymer layers and its main function is to provide support for the first and second polymer layers.

[0004] However, in the existing technology, the fluffy cotton layer of the absorbent core is a fluffy single-layer structure made of natural cotton fibers, man-made fibers, or synthetic fibers through loosening, carding, spraying glue, baking and curing. Since the fluffy cotton needs to be continuously fed by the material roller during the production process of the absorbent core, the single-layer fluffy cotton structure in the existing technology is not tensile and cannot adapt to the start-up of high-speed machines. It is easy to deform when it is loaded onto the machine, and its softness is poor, which affects the comfort of the finished product. In addition, the single-layer fluffy cotton has poor support for polymer particles and is easy to leak. The fluffy cotton layer in the existing technology cannot take into account strength, softness and support performance. Summary of the Invention

[0005] One of the purposes of this utility model is to address the shortcomings of existing technologies by providing a fluffy cotton structure for disposable sanitary pad cores and disposable sanitary pads. The multi-layer structure combines high softness, high fluffiness, and high strength. It is not only soft and fluffy with excellent comfort, but also not easily deformed when used on a machine and has good support for polymer particles. This solves the technical problems of existing single-layer fluffy cotton structures, such as being heavy, easily deformed when used on a machine, having poor softness, and being prone to leakage of polymer particles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The core of a disposable sanitary pad uses a fluffy cotton structure, comprising: a fluffy layer and a support layer that are distributed vertically and interconnected; wherein the fluffy layer is a fluffy structure with randomly arranged fibers, and the support layer is a thin layer or a thin mesh with fibers arranged in a straight direction.

[0007] Preferably, the fluffy layer is a fluffy, fibrous layer with fibers arranged in a disordered manner.

[0008] Preferably, the connection between the fluffy layer and the support layer is a thermal adhesive bond.

[0009] Preferably, the fluffy layer has at least two layers, and the fiber denier of each fluffy layer is distributed in a gradient increasing from top to bottom.

[0010] Preferably, the fiber orientation of the support layer is consistent with the traction and conveying direction when the fluffy cotton is loaded onto the machine.

[0011] Preferably, the basis weight of the fluffy layer is 25~65 gsm, and the basis weight of the support layer is 5~10 gsm.

[0012] Preferably, the fluffy layer is made of 2-6 denier fiber and the support layer is made of 1-2 denier fiber.

[0013] Preferably, the thickness of the fluffy layer is 4-15 mm, and the thickness of the support layer is less than 0.2 mm.

[0014] Preferably, both the fluffy layer and the support layer are made of bicomponent fibers.

[0015] Preferably, the bicomponent fiber is PE-PP or PE-PET.

[0016] Preferably, the fluffy cotton structure is formed by carding a fluffy layer and a support layer separately with a double carding machine, and then hot air bonding the fluffy layer and the support layer together.

[0017] Preferably, the softness of this fluffy cotton structure is <0.3mN and the strength is >20cN.

[0018] This utility model also provides a disposable sanitary material, including an absorbent core layer, wherein the absorbent core layer includes a fluffy cotton structure as described above, the fluffy cotton structure supporting and fixing the absorbent material, and the disposable sanitary material includes diapers or sanitary napkins.

[0019] The beneficial effects of this utility model are as follows: (1) The fluffy cotton structure in this utility model adopts at least a double-layer structure. The bottom support layer is a thin mesh with fibers arranged in the same direction. It has good density and serves as a skeleton, providing good strength and tensile strength for the overall structure, stabilizing tension, and making it less prone to deformation on the machine. It also supports polymer particles. The fluffy layer above the support layer is a fluffy fuzzy structure with fibers arranged in a disordered manner. With the support layer, the fluffy layer can be fully fluffy and soft, can accommodate more polymer particles, and provides a fluffy and soft texture for the overall structure, making it comfortable to use. The novel fluffy cotton structure designed in this utility model effectively balances structural strength and fluffy softness, and is especially suitable for the production of the core of absorbent sanitary materials.

[0020] (2) This utility model adopts multiple fluffy layers with the fiber denier of each fluffy layer increasing from top to bottom to meet customized needs. The product has twice the strength and softness of ordinary fluffy cotton, which makes it more stable when customers use it on the machine, facilitates production and improves efficiency. The sanitary napkins and diapers produced by customers using this product will be softer, and the support layer can prevent polymer from falling off. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the overall structure of this utility model; Figure 2 This is a top view schematic diagram of the structure of the fluffy layer in this utility model; Figure 3 This is a top view of the support layer structure in this utility model; Figure 4 This is a top view of the actual product of this utility model (fluffy layer facing upwards); Figure 5 This is a bottom view of the actual product of this utility model (support layer facing upwards). Detailed Implementation

[0022] 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.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Example 1 like Figure 1 As shown, the core of disposable sanitary pads uses a fluffy cotton structure, comprising: a fluffy layer 1 and a support layer 2 that are distributed vertically and interconnected; wherein, combined with Figure 2 and Figure 4 As shown, the fluffy layer 1 has fibers arranged in a disordered, fluffy manner, combined with... Figure 3 and Figure 5 As shown, the support layer 2 is a thin layer or a thin mesh in which the fibers are arranged in the same direction.

[0025] As an improvement, the fiber orientation of the support layer 2 is consistent with the traction and conveying direction when the fluffy cotton is loaded onto the machine.

[0026] In this embodiment, the fluffy cotton has at least a double-layer structure, with different fiber arrangements in the bottom and top layers. The bottom support layer 1 has fibers arranged in a longitudinal direction to form a backbone, making it a thin mesh that acts as a skeleton to provide good strength and tensile strength for the overall structure. The longitudinal fiber arrangement of the support layer 1 is consistent with the conveying direction of the traction roller during machine operation, thus providing tensile strength in the traction direction and preventing deformation during machine operation. Furthermore, its higher density provides better support for polymer particles and effectively prevents leakage. The fluffy layer 2 above the support layer 1 has randomly arranged, fluffy fibers. Building upon the support layer 1, the fluffy layer 2 is sufficiently fluffy and soft, capable of accommodating more polymer particles and providing a soft and comfortable texture for the overall structure. This innovative fluffy cotton structure effectively balances structural strength and softness, exhibiting high strength, resistance to deformation during machine operation, a softer overall texture, good support for polymer particles, and low leakage.

[0027] In one embodiment, the support layer 2 is a thin layer in which the fibers are arranged in a longitudinal direction. The term "thin layer" refers to the fibers being arranged in a unidirectional orientation, such as... Figure 3 As shown, the warp lines are arranged in a directional manner, forming a multi-linear structure.

[0028] In another embodiment, the support layer 2 is a thin mesh in which the fibers are arranged in the same direction. The thin mesh refers to the fibers being oriented in at least two directions, such as warp and weft threads that cross each other or are distributed perpendicularly, forming a mesh structure.

[0029] As an improvement, the fluffy layer 1 is a fluffy, fibrous structure with fibers arranged in a disordered manner.

[0030] Preferably, the fiber length constituting the fluffy layer 1 is 0.3~0.6mm, more preferably 0.38~0.51mm.

[0031] As an improvement, the basis weight of the fluffy layer 1 is 25~65 gsm, and the basis weight of the support layer 2 is 5~10 gsm.

[0032] As an improvement, the fluffy layer 1 is made of 2-6 denier fibers, and the support layer 2 is made of 1-2 denier fibers.

[0033] In this embodiment, finer denier fibers are used, resulting in a fluffy cotton structure with better softness.

[0034] As an improvement, the thickness of the fluffy layer 1 is 4~15mm, and the thickness of the support layer 2 is less than 0.2mm, preferably less than 0.1mm.

[0035] As an improvement, both the fluffy layer 1 and the support layer 2 are made of bicomponent fibers.

[0036] As an improvement, the bicomponent fiber is PE-PP or PE-PET.

[0037] Preferably, the connection between the fluffy layer 1 and the support layer 2 is a thermal adhesive connection.

[0038] In a preferred embodiment, the connection between the fluffy layer 1 and the support layer 2 is a hot air bonding connection.

[0039] As an improvement, the fluffy cotton structure is formed by a double carding machine separately carding the fluffy layer 1 and the support layer 2, and then hot air bonding the fluffy layer 1 and the support layer 2.

[0040] In this embodiment, the fluffy cotton structure has a support layer 2 obtained by a carding machine through directional carding. It is a shaped, ultra-thin fabric structure, thus possessing good strength, tensile strength, and resistance to deformation. The fluffy layer 1 is obtained by a carding machine through random carding. It is composed of irregular flocculent fibers and is not shaped itself, thus possessing good fluffiness and softness.

[0041] It should be further explained that, in this embodiment, during the forming process of the support layer 2, while the fibers are being combed in the forward direction, a certain high temperature condition is used to bond the fibers together, thereby obtaining a thin mesh structure with strength. The fluffy layer 1, however, does not require a high temperature condition during forming; its fibers tend to be in a disordered state without direct adhesion, thus achieving the aforementioned shapeless form. In contrast, existing single-layer fluffy cotton structures require a certain high temperature condition during forming to bond the fibers together in order to achieve a certain strength, but this sacrifices softness. Existing single-layer fluffy cotton structures strike a trade-off between strength and softness, resulting in a final product that lacks both good strength and good softness.

[0042] As an improvement, the softness of this fluffy cotton structure is <0.3mN, and the strength is >20cN.

[0043] To more intuitively demonstrate the performance advantages of the fluffy cotton structure in this application, the thickness, strength, elongation, and softness performance parameters of the traditional single-layer fluffy cotton structure in the prior art and the double-layer fluffy cotton structure in this application were measured in this embodiment.

[0044] Measurements were taken of a traditional single-layer fluffy cotton structure with a basis weight of 55 gsm and the double-layer fluffy cotton structure of this application. The measuring instruments and conditions are shown in Table 1 below.

[0045] Table 1 The relevant measurement data are shown in Table 2 below:

[0046] Table 2 Based on the above measurement data, under the premise of the same weight: Comparison of thickness data with rulers shows that the double-layer fluffy cotton structure of this application is fluffier than the traditional single-layer fluffy cotton structure. Comparison of thickness data with instruments shows that under the same pressure conditions, the double-layer fluffy cotton structure of this application can be compressed thinner. This shows that the double-layer fluffy cotton structure of this application has excellent fluffiness and softness. The softness data also positively reflects that the double-layer fluffy cotton structure of this application has excellent softness. In addition, it should be noted that due to limitations in measurement conditions, the softness measurement of the double-layer fluffy cotton structure in this application can only be performed on the entire structure. The softness measurement data is more than twice that of the traditional single-layer fluffy cotton structure. However, it is clear that the actual softness performance of the double-layer fluffy cotton structure in this application is mainly determined by the fluffy layer 1. The softness performance of the fluffy layer 1 alone is obviously lower than the above measurement value, that is, its softness is better.

[0047] Comparison of strength and elongation data shows that the double-layer fluffy cotton structure of this application also has excellent tensile strength, which is more than twice that of the traditional single-layer fluffy cotton structure.

[0048] In summary, the double-layer fluffy cotton structure of this application combines excellent fluffiness, softness, and tensile strength, resulting in significantly superior overall performance.

[0049] Example 2 The components in this embodiment that are the same as or corresponding to those in the above embodiments are referred to by the same reference numerals as those in the above embodiments. For the sake of simplicity, only the differences between this embodiment and the above embodiments are described below. The difference between this embodiment and the above embodiments is that: As an improvement, such as Figure 1 As shown, the fluffy layer 1 has at least two layers, and the fiber denier of each fluffy layer 1 is distributed in a gradient increasing from top to bottom.

[0050] In this embodiment, by employing multiple layers of fluffy layers 1 with the fiber denier of each fluffy layer 1 increasing in a gradient from top to bottom, the customization requirements are met.

[0051] Example 3 This embodiment provides a disposable sanitary material, including an absorbent core layer. The absorbent core layer includes a fluffy cotton structure as described in any of the above embodiments. The fluffy cotton structure carries and fixes the absorbent material. The disposable sanitary material includes diapers or sanitary napkins.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 disposable sanitary napkin core with a fluffy cotton structure, characterized in that, include: A fluffy layer (1) and a support layer (2) that are distributed vertically and connected to each other; The fluffy layer (1) is a fluffy layer with randomly arranged fibers, and the support layer (2) is a thin layer or a thin mesh with fibers arranged in the same direction.

2. The fluffy cotton structure for disposable sanitary pad cores according to claim 1, characterized in that, The fluffy layer (1) is a fluffy, fibrous structure with fibers arranged in a disordered manner.

3. The fluffy cotton structure for disposable sanitary pad cores according to claim 1, characterized in that, The connection between the fluffy layer (1) and the support layer (2) is a thermal adhesive connection.

4. The fluffy cotton structure for disposable sanitary material cores according to claim 1, characterized in that, The fluffy layer (1) is provided with at least two layers, and the fiber denier of each fluffy layer (1) is distributed in a gradient increasing from top to bottom.

5. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, The fiber orientation of the support layer (2) is consistent with the traction and conveying direction when the fluffy cotton is loaded onto the machine.

6. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, The weight of the fluffy layer (1) is 25~65 gsm, and the weight of the support layer (2) is 5~10 gsm.

7. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, The fluffy layer (1) is made of 2-6 denier fiber, and the support layer (2) is made of 1-2 denier fiber.

8. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, The thickness of the fluffy layer (1) is 4~15mm, and the thickness of the support layer (2) is less than 0.2mm.

9. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, Both the fluffy layer (1) and the support layer (2) include bicomponent fibers, which are PE-PP or PE-PET.

10. The fluffy cotton structure for disposable sanitary pad cores according to any one of claims 1-4, characterized in that, The softness of this fluffy cotton structure is <0.3mN, and its strength is >20cN.

11. A disposable sanitary pad, comprising an absorbent core layer, characterized in that, The absorbent core layer includes a fluffy cotton structure as described in any one of claims 1-10, which carries and fixes the absorbent material, and the disposable sanitary material includes diapers or sanitary napkins.

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