Composite surface layer of hygienic product

Abstract

The utility model relates to a composite surface layer for hygienic products, which sequentially comprises a surface layer, a flow guide layer, a water absorption layer and a diffusion layer from top to bottom, the flow guide layer and the diffusion layer are both made of ES fiber and wood pulp mixed fiber, the water absorption layer is made of high-molecular water-absorbent resin, and the high-molecular water-absorbent resin is uniformly permeated into the flow guide layer; the surface layer is made of hot air non-woven fabrics or ES fibers. The surface layer, the flow guide layer, the water absorption layer and the diffusion layer are made into the composite surface layer, so that semi-finished products are provided for subsequently making sanitary articles such as sanitary towels and paper diapers, and the production efficiency of the sanitary articles is improved.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products, and in particular to a composite surface layer for hygiene products. Background Technology

[0002] Existing sanitary napkins generally consist of a bottom film, a flow-guiding nonwoven fabric, a core, an absorbent core, and a top layer. To allow liquid on the top layer to quickly seep down and be absorbed by the absorbent core, a flow-guiding layer is provided between the top layer and the absorbent core. However, since the top layer and the flow-guiding layer are separate, the manufacturing process involves an additional step of placing the flow-guiding layer between the top layer and the core and absorbent core, reducing production efficiency. In addition, when the user moves, the sanitary napkin may deform to some extent, and the flow-guiding layer may separate from the top layer, thus failing to perform its function effectively, or even failing to perform its flow-guiding function at all.

[0003] Chinese patent CN213190605U discloses a novel absorbent material, comprising a top layer, a polymer composite absorbent paper, a hot melt adhesive-free core, a breathable bottom film, and a bottom film nonwoven fabric. The polymer composite absorbent paper covers the top, sides, and bottom ends of the hot melt adhesive-free core. The breathable bottom film is located at the lower end of the polymer composite absorbent paper and the hot melt adhesive-free core, creating a hollow area between them. The top layer covers the top and sides of the polymer composite absorbent paper, and the bottom film nonwoven fabric is bonded to the breathable bottom film. The polymer composite absorbent paper wraps around the hot melt adhesive-free core in an inverted C-shape. Both the polymer composite absorbent paper and the hot melt adhesive-free core contain superabsorbent polymer resin. Its multi-layered structure is bonded using hot melt adhesive, requiring layer-by-layer spraying of hot melt adhesive during processing, which reduces production efficiency.

[0004] Chinese patent CN213993947U discloses a high-absorption-rate inner core composite material, relating to the field of hygiene products. It includes a surface layer, a flow-guiding layer downwards from the surface layer for absorbing and temporarily storing liquid, an absorbent core layer downwards from the flow-guiding layer for absorbing liquid diffused by the flow-guiding layer, and a leak-proof layer downwards from the absorbent core layer. The flow-guiding layer includes a coarse-denier fiber layer and a fine-denier fiber layer, with the coarse-denier fiber layer near the surface layer and the fine-denier fiber layer near the absorbent core layer. The permeability of the fine-denier fiber layer is lower than that of the coarse-denier fiber layer. This composite material facilitates liquid dispersion; however, while using fine-denier and coarse-denier fiber layers as the flow-guiding layer, the water retention performance within the flow-guiding layer needs improvement. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a composite surface layer for sanitary products, thereby replacing the multi-layer fabric structure in sanitary napkins except for the bottom film and absorbent core, improving the production speed of sanitary napkins and providing support for the efficient production of sanitary napkins.

[0006] To achieve the above objectives, this utility model provides a composite surface layer for hygiene products, which consists of a surface layer, a flow guiding layer, an absorbent layer, and a diffusion layer from top to bottom. The flow guiding layer and the diffusion layer are both composed of a mixture of ES fibers and wood pulp fibers. The absorbent layer is composed of superabsorbent polymer (SAP). The flow guiding layer is uniformly permeated with SAP. The surface layer is made of hot-air nonwoven fabric or ES fibers.

[0007] Preferably, the amount of each of the surface layer, the flow guiding layer, and the diffusion layer is 10-80 g / m³. 2 .

[0008] Preferably, the amount of superabsorbent polymer used in the absorbent layer is 5-300 g / m³. 2 .

[0009] Preferably, the layers of the composite surface layer are bonded together by thermal fusion bonding with ES fibers. The ES fibers act as an integral bond after heating.

[0010] Preferably, the widths of the surface layer, the flow guiding layer, the water-absorbing layer, and the diffusion layer are consistent.

[0011] Preferably, the width of the composite surface layer is 160cm.

[0012] Preferably, the melting point of the ES fiber is between 130°C and 180°C.

[0013] This utility model has the following technical effects:

[0014] 1. This utility model makes a composite surface layer, consisting of a surface layer, a diversion layer, an absorbent layer, and a diffusion layer, thereby providing a semi-finished product for the subsequent production of sanitary products such as sanitary napkins and diapers, and improving the production efficiency of these sanitary products.

[0015] 2. The flow guiding layer and diffusion layer of this utility model are both made of a mixture of ES fiber and wood pulp. The ES fiber is heated in the oven and then melted to act as a bond. While reducing the amount of adhesive used, the hot melt bonding makes the material more firmly bonded, avoiding clumping and breakage, and ensuring the stability of the composite surface layer. It achieves the best performance balance in terms of hot melt bonding and hydrophobicity.

[0016] 3. Because the superabsorbent polymer particles are evenly infiltrated into the guide layer, the water absorption speed is accelerated, allowing the infiltrated liquid to be quickly guided to the absorbent layer and the diffusion layer, achieving optimal overall water absorption performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the composite surface layer of this hygiene product. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings.

[0019] Example 1

[0020] like Figure 1 As shown, a composite surface layer of a hygiene product is composed of a surface layer 1, a flow-guiding layer 2, an absorbent layer 3, and a diffusion layer 4 from top to bottom. The flow-guiding layer 2 and the diffusion layer 4 are both composed of a mixture of ES fiber and wood pulp fibers. The absorbent layer 3 is composed of superabsorbent polymer. The flow-guiding layer 4 is uniformly permeated with superabsorbent polymer. The surface layer 1 is made of hot-air nonwoven fabric or ES fiber and is the skin contact surface.

[0021] The composite surface layers are bonded together by ES fiber through thermal fusion bonding. The melting point of ES fiber is between 130℃ and 180℃. After heating, the ES fiber plays a role in the overall bonding of the composite surface layers, thus eliminating the need for adhesive bonding and making the composite surface layers more robust.

[0022] The composite surface layer consists of surface layer 1, diversion layer 2, absorbent layer 3, and diffusion layer 4, all with the same width, specifically 160cm. They are stored in rolls for later use and then cut into 8cm or other suitable sizes when making sanitary napkins.

[0023] The amount of each of the surface layer, flow guiding layer, and diffusion layer is 10-80 g / m³. 2 The dosage of superabsorbent polymer (SAP) in the absorbent layer 13 is 5-300 g / m². 2 .

[0024] Example 2

[0025] A method for preparing a composite surface layer for hygiene products includes the following sequential steps:

[0026] (1) Lay the surface layer flat on the workbench, and install an exhaust fan and vibrator under the surface layer;

[0027] (2) The flow guide layer is laid on the surface layer under the action of the exhaust fan;

[0028] (3) Lay the absorbent layer on the guide layer, and under the action of the exhaust fan and vibrator, make the superabsorbent polymer particles evenly penetrate into the guide layer.

[0029] (4) Under the action of the exhaust fan, the diffusion layer is laid on the water absorption layer;

[0030] (5) Place it in an oven for drying, and set the oven temperature to 130-180℃;

[0031] (6) The dried composite surface layer is cooled and then wound up.

[0032] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A sanitary product composite cover, characterized by: It is composed of surface layer, flow guide layer, water absorption layer and diffusion layer from top to bottom, the flow guide layer and diffusion layer are composed of mixed fiber of ES fiber and wood pulp, the water absorption layer is composed of high polymer water absorption resin, the flow guide layer is uniformly penetrated with high polymer water absorption resin; the surface layer adopts hot air non-woven fabric or ES fiber.

2. The sanitary product composite topsheet according to claim 1, characterized in that: The amount of the surface layer, the flow guide layer and the diffusion layer is 10-80 g / m 2 .

3. The sanitary product composite topsheet according to claim 1 or 2, characterized in that: The water-absorbing layer polymer water-absorbing resin is used in an amount of 5-300 g / m 2 .

4. The sanitary product composite topsheet according to claim 1, characterized in that: Each layer of the composite surface layer is bonded by ES fiber hot melting.

5. The sanitary product composite cover according to claim 1, characterized in that: The width of the surface layer, flow guide layer, water absorption layer and diffusion layer is consistent.

6. The sanitary product composite cover according to claim 1 or 5, characterized in that: The width of the composite surface layer is 160 cm.

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