Composite water-absorbing structure with net support

Abstract

This invention provides a water-absorbing structure and a cleaning cloth that prevent crushing (collapse) of nonwoven fabrics, delayed water absorption, and delamination of layers in multilayer structures, thereby significantly improving water absorption and structural stability. [Solution] A composite water-absorbing structure body (1) comprises a first meltblown nonwoven fabric layer (11), a second meltblown nonwoven fabric layer (13), and a polypropylene net layer (12) sandwiched between them and having multiple meshes (121), wherein the three-layer structure is integrated by a press-joint structure having an embossed pattern (14) in which planar patterns and intersecting patterns are arranged alternately. When the body (1) is folded and overlapped in multiple layers, the physical rigidity of the polypropylene net layer (12) defines inter-folding gaps (15) between each overlapping layer, which communicate with the meshes (121) to form an efficient three-dimensional fluid guidance space.

Description

Technical Field

[0001] The present invention relates to a water absorption structure, and particularly to a composite water absorption structure having a net support and a cleaning cloth composed of the same.

Background Art

[0002] Conventional absorbent cleaning cloths are often composed of a single layer or multiple layers of pure non-woven fabrics laminated together. However, when the pure non-woven fabric structure is saturated with water or subjected to external pressure, the structure is extremely prone to collapse, and the fine pores originally used for water storage and flow guiding disappear. This conventional technology not only significantly reduces the water absorption speed but also easily causes the phenomenon of water backflow and bleeding (rewetting) when repeatedly wiping with the cleaning cloth.

[0003] Also, in the prior art, there have been attempts to introduce a support material inside the non-woven fabric, but most of them use an adhesive to bond the layers together. This conventional technology not only blocks the water absorption pores of the non-woven fabric and reduces the overall water absorption performance but also easily causes delamination between the layers due to repeated washing and pulling. Therefore, providing a long-term and crush-resistant fluid flow guiding space in a single composite structure and maintaining excellent interlayer bonding strength is an important issue to be solved in this field.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The main object of the present invention is to solve the drawbacks that conventional absorbent cleaning cloths are easily crushed when subjected to pressure, have a slow water absorption speed, and are easily peeled in a multi-layer structure, and to provide a composite water absorption structure having a net support and a cleaning cloth using the same.

Means for Solving the Problems

[0005] To achieve the above-mentioned objectives, the technical means employed by this invention are as follows: In other words, a composite water-absorbing structure having a net support, comprising: a first meltblown nonwoven fabric layer (11); a second meltblown nonwoven fabric layer (13); and a polypropylene net layer (12) sandwiched between the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13) and having a plurality of meshes (121), wherein the first meltblown nonwoven fabric layer (11), the polypropylene net layer (12), and the second meltblown nonwoven fabric layer (13) have a common press-bonded structure and an embossed pattern (14) formed on their surface, the embossed pattern (14) is composed of alternating planar patterns and intersecting patterns, and the polypropylene net layer (12) provides physical support between the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13).

[0006] Preferably, the composite water-absorbing structure body (1) is configured as a cleaning cloth.

[0007] Preferably, the composite water-absorbing structure body (1) is folded and overlapping in multiple layers, and has at least one inter-folding gap (15) between each overlapping layer, defined by the physical support of the polypropylene net layer (12).

[0008] Preferably, the gap (15) between the folded layers communicates with the mesh (121) of the polypropylene net layer (12), forming a fluid guide space.

[0009] Preferably, the fiber density of the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13) in the region corresponding to the embossed pattern (14) is greater than the fiber density of the region that is not press-bonded.

[0010] Preferably, the thickness of the polypropylene net layer (12) is greater than the thickness of a single layer of the first meltblown nonwoven fabric layer (11) or the second meltblown nonwoven fabric layer (13). [Effects of the Invention]

[0011] This invention, through the static physical structure described above, can achieve the following remarkable effects.

[0012] 1. Preventing structural collapse: The polypropylene net layer (12) sandwiched in the middle has excellent pressure resistance, so even when the rag is subjected to pressure from the hand or friction with the floor surface, it maintains the integrity of the internal mesh (121) and prevents the nonwoven fabric from being crushed.

[0013] 2.Efficient three-dimensional conduction: When the main body (1) is folded in multiple layers, the physical rigidity of the polypropylene net layer (12) firmly secures (supports) the inter-layer folding gaps (15) between the layers, allowing moisture to quickly move along these gaps to the inner unsaturated layer, thus achieving a flow guidance effect as a "fluid highway."

[0014] 3. Adhesive-free integrated structure: Because the three layers of fibers are physically melt-bonded in the embossed pattern (14) via a press-bonded structure, there is no need to use chemical adhesives, which is not only environmentally friendly but also thoroughly prevents delamination after repeated washing. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram showing the decomposition structure of the composite water-absorbing structure of the present invention. [Figure 2] This is a schematic diagram showing the surface embossed pattern of the composite water-absorbing structure of the present invention. [Figure 3] This is a schematic diagram of a localized enlarged cross-section of the composite water-absorbing structure of the present invention in a folded and overlapping state. [Modes for carrying out the invention]

[0016] As shown in FIGS. 1, FIG. 2, and FIG. 3, the composite water absorption structure body (1) of the present invention mainly comprises a first melt-blown non-woven fabric layer (11), a second melt-blown non-woven fabric layer (13), and a polypropylene (PP) net layer (12) sandwiched therebetween.

[0017] The first melt-blown non-woven fabric layer (11) and the second melt-blown non-woven fabric layer (13) have excellent hydrophilicity and fine pores, and mainly responsible for the absorption and storage of moisture. The polypropylene net layer (12) has a plurality of regularly arranged meshes (121), and the pore diameter of the meshes (121) is preferably from 1.0 mm to 3.0 mm, so that moisture and air can pass through freely.

[0018] The first melt-blown non-woven fabric layer (11), the polypropylene net layer (12), and the second melt-blown non-woven fabric layer (13) have a common press bonding structure. As shown in FIG. 2, the press bonding structure presents an embossing pattern (14) on the surface of the body (1), and the embossing pattern (14) is composed of an alternating arrangement of a plane pattern (such as parallel lines) and an intersection pattern (such as grid lines). In the region corresponding to the embossing pattern (14), the fibers of the first and second melt-blown non-woven fabric layers (11, 13) are physically fused and fitted to each other, and the fiber density in this region is significantly higher than that in other non-press bonding regions. Such a design provides excellent interlayer shear strength and prevents interlayer peeling during use.

[0019] Particularly as shown in FIG. 3, when the composite water absorption structure body (1) of the present invention is folded and overlapped in multiple layers (for example, in a state of being folded in half or quadruple and used as a cleaning cloth), the interfaces between the overlapping layers are not completely adhered. Since the polypropylene net layer (12) has specific physical rigidity and thickness, it functions as an elastic support framework when subjected to pressure, thereby defining a fine folding layer gap (15) between adjacent folding layers.

[0020] The folding layer gap (15) communicates with the meshes (121) of the polypropylene net layer (12), and they jointly construct a three-dimensional fluid conduction space inside the multi-layer cross body. When the water absorption of the outermost melt-blown non-woven fabric layer reaches saturation, the excess moisture quickly migrates along these folding layer gaps (15) and meshes (121) to the inner unsaturated layers by gravity and capillary attraction. Thereby, a dynamic rapid water conduction and water storage effect is realized, and the reverse return of moisture to the surface during repeated wiping can be prevented.

Explanation of symbols

[0021] 1: Composite water absorption structure body 11: First melt-blown non-woven fabric layer 12: Polypropylene net layer 121: Meshes 13: Second melt-blown non-woven fabric layer 14: Embossed pattern 15: Folding layer gap

Claims

1. The material comprises a first meltblown nonwoven fabric layer (11), a second meltblown nonwoven fabric layer (13), and a polypropylene net layer (12) sandwiched between the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13) and having a plurality of meshes (121). The first meltblown nonwoven fabric layer (11), the polypropylene net layer (12), and the second meltblown nonwoven fabric layer (13) have a common press-bonded structure and an embossed pattern (14) is formed on their surface. The embossed pattern (14) is composed of alternating planar patterns and intersecting patterns. The polypropylene net layer (12) is characterized by providing physical support between the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13). Composite water absorption structure.

2. The composite water-absorbing structure according to claim 1, characterized in that the composite water-absorbing structure body (1) is configured as a cleaning cloth.

3. The composite water-absorbing structure according to claim 1, characterized in that the composite water-absorbing structure body (1) is folded and overlapping in multiple layers, and has at least one interfolded gap (15) between each overlapping layer defined by the physical support of the polypropylene net layer (12).

4. The composite water-absorbing structure according to claim 3, characterized in that the gap (15) between the folded layers communicates with the mesh (121) of the polypropylene net layer (12) and constitutes a fluid guide space.

5. The composite water-absorbing structure according to claim 1, characterized in that the fiber density of the first meltblown nonwoven fabric layer (11) and the second meltblown nonwoven fabric layer (13) in the region corresponding to the embossed pattern (14) is greater than the fiber density of the region that is not press-bonded.

6. The composite water-absorbing structure according to claim 1, characterized in that the thickness of the polypropylene net layer (12) is greater than the thickness of a single layer of the first meltblown nonwoven fabric layer (11) or the second meltblown nonwoven fabric layer (13).

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