Side leakage prevention composite non-woven fabric and absorption product

Abstract

The composite non-woven fabric comprises an upper-layer non-woven fabric and a lower-layer non-woven fabric, the composite non-woven fabric is provided with protruding areas and perforated areas, the perforated areas are provided with a plurality of funnel-shaped holes, the protruding areas are located on the two sides of the perforated areas and comprise at least one row of protruding parts extending in the longitudinal direction and flat parts, and the flat parts are located on the lower-layer non-woven fabric. The protruding part is provided with an internal independent space located between the upper-layer non-woven fabric and the lower-layer non-woven fabric, and the inner surface of the protruding area of the upper-layer non-woven fabric is provided with a hydrophobic coating. Compared with non-woven fabric with hydrophobic coatings on the outer surfaces of the protrusions, when the non-woven fabric is used, body fluid can be rapidly absorbed by the surface hydrophilic fibers when making contact with the surfaces of the protrusion areas and guided to the hydrophilic open hole areas by the hydrophobic coatings on the inner surfaces of the protrusion areas, namely, the body fluid is firstly absorbed and then guided in the non-woven fabric. The body fluid is further prevented from slipping out of the absorption product, the protruding areas further play a role of a leakage-proof retaining wall, and the absorption product is dry and comfortable to use.

Description

Technical Field

[0001] This utility model relates to the technical field of nonwoven fabrics, and particularly to a composite nonwoven fabric and absorbent product that prevents side leakage of body fluids and has fast absorption. Background Technology

[0002] Non-woven fabrics are soft and fluffy, making them easily acceptable to people. To achieve rapid absorption and prevent side leakage, non-woven fabrics are generally made of hydrophilic fibers. However, although hydrophilic non-woven fabrics can quickly absorb body fluids during use, the surface area of ​​the non-woven fabric is relatively large, making it easy for body fluids to spread to the edges of the absorbent product. Even with embossed bumps or guide strips on both sides of the absorbent product, there is still a risk of side leakage due to body fluid diffusion. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a composite nonwoven fabric and absorbent product that prevents side leakage of body fluids, has a fast absorption speed, and a dry surface.

[0004] The technical solution of this utility model is as follows:

[0005] A leak-proof composite nonwoven fabric includes an upper nonwoven fabric and a lower nonwoven fabric; both the upper and lower nonwoven fabrics are hydrophilic nonwoven fabrics; the composite nonwoven fabric has raised areas and perforated areas; the perforated areas have multiple funnel-shaped openings; the raised areas are located on both sides of the perforated areas laterally and include at least one row of longitudinally extending raised portions and at least one row of longitudinally extending flat portions; the raised portions have independent internal spaces located between the upper and lower nonwoven fabrics; the upper nonwoven fabric has a hydrophobic coating on the inner surface of the raised areas.

[0006] The upper nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric; the lower nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

[0007] The opening area also has multiple embossed protrusions or embossed depressions.

[0008] The hydrophobic coating is located only on the inner surface of the raised portion of the raised area of ​​the upper nonwoven fabric.

[0009] The hydrophobic coating is a functional hydrophobic coating.

[0010] The hydrophobic coating is a colored hydrophobic coating.

[0011] The flat portion of the raised area has a first funnel-shaped opening.

[0012] An absorbent product comprising the aforementioned anti-leakage composite nonwoven fabric, wherein the anti-leakage composite nonwoven fabric is located on the surface layer of the absorbent product, wherein: the perforated area is located in the middle of the absorbent area of ​​the absorbent product, and the raised area is located on both sides of the absorbent area of ​​the absorbent product.

[0013] After adopting the above solution, the anti-leakage composite nonwoven fabric of this utility model can be used as the surface layer of sanitary napkins or diapers. Since the raised areas of the composite nonwoven fabric are located on both sides of the open area, when body fluid reaches the surface of the composite nonwoven fabric, the body fluid can quickly penetrate into the absorbent layer in the open area. Excess body fluid can also be prevented from further spreading to both sides and forming side leakage by the blocking effect of the raised areas on both sides. In addition, the inner surface of the raised area of ​​the upper nonwoven fabric has a hydrophobic coating, and the outer surface of the upper nonwoven fabric is hydrophilic. Compared with nonwoven fabrics with a hydrophobic coating on the outer surface of the raised area, body fluid can also be quickly absorbed by the hydrophilic fibers on the surface when it comes into contact with the raised area. The fluid is absorbed and guided by the hydrophobic coating on the surface of the raised area to the hydrophilic open-cell area. This means the fluid is first absorbed and then guided within the nonwoven fabric, further preventing leakage and making the raised area more effective as a leak-proof barrier, resulting in a drier feel during use. Simultaneously, the hydrophobic coating on the inner surface of the upper nonwoven fabric in the raised area effectively prevents fluid from returning to the nonwoven surface. Furthermore, during production, the two layers of nonwoven fabric are embossed, perforated, coated, and laminated simultaneously using a coating, embossing, and perforating device and a laminating device, reducing production steps and saving costs. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 1 of this utility model;

[0015] Figure 2 This is a schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 1 of this utility model;

[0016] Figure 3 This is a schematic diagram of the production process of the anti-leakage composite nonwoven fabric of Embodiment 1 of this utility model;

[0017] Figure 4 This is a cross-sectional schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 2 of this utility model;

[0018] Figure 5 This is a schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 2 of this utility model;

[0019] Figure 6 This is a partial production process diagram of the anti-leakage composite nonwoven fabric of Embodiment 2 of this utility model;

[0020] Figure 7This is a cross-sectional schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 3 of this utility model;

[0021] Figure 8 This is a schematic diagram of the anti-leakage composite nonwoven fabric of Embodiment 3 of this utility model;

[0022] Figure 9 This is a partial cross-sectional view along the axial direction of the embossing roller and needle roller in the production process of the anti-leakage composite nonwoven fabric of Embodiment 3 of this utility model.

[0023] Figure 10 This is a partial sectional view along the axial direction of another embossing roller and needle roller in the production process of the anti-leakage composite nonwoven fabric of Embodiment 3 of this utility model.

[0024] Label Explanation:

[0025] Example 1

[0026] Upper non-woven fabric 1, lower non-woven fabric 2, and anti-leakage composite non-woven fabric 12;

[0027] Raised area a, raised portion a1, flat portion a2, open area b, funnel-shaped open portion b1, hydrophobic coating c;

[0028] Embossing roller A, embossing protrusion A1, embossing depression A2;

[0029] Needle roller B, concave hole B1, punching needle B2;

[0030] Liquid storage tank C, liquid loading roller D, liquid coating roller E, composite roller F, composite recess F1;

[0031] Example 3

[0032] Embossed protrusion b2, first funnel-shaped opening a3, first embossed protrusion A3, first punching needle B3, second embossed protrusion B4. Detailed Implementation

[0033] The technical solution of this utility model will be further explained and described below with reference to the accompanying drawings through specific embodiments.

[0034] Example 1

[0035] like Figure 1 and Figure 2As shown, this utility model discloses a leak-proof composite nonwoven fabric 12, which is composed of an upper nonwoven fabric 1 and a lower nonwoven fabric 2. The composite nonwoven fabric 12 has a raised area a and an opening area b. The opening area b has a plurality of funnel-shaped openings b1. The raised area a is located on both sides of the opening area b in the transverse direction and includes a raised portion a1 and a flat portion a2 extending longitudinally by at least one column. The raised portion a1 can be a continuous raised portion extending longitudinally or a plurality of discontinuous raised portions extending longitudinally. In embodiment 1, the raised portion a1 is a plurality of discontinuous raised portions extending longitudinally. The raised portion a1 has an independent internal space located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, that is, the raised portion a1 is hollow, and a hydrophobic coating c is provided on the inner surface of the raised area a of the upper nonwoven fabric 1. Wherein: the nonwoven fabric can be hot-air nonwoven fabric, spunbond nonwoven fabric or spunlace nonwoven fabric, and the upper nonwoven fabric 1 and the lower nonwoven fabric 2 can both be hydrophilic nonwoven fabric; in Example 1, both the upper nonwoven fabric and the lower nonwoven fabric are hot-air nonwoven fabric.

[0036] like Figure 3 As shown, the anti-leakage composite nonwoven fabric 12 of this utility model is manufactured using the following method:

[0037] (1) The upper nonwoven fabric 1 enters the coating, embossing and punching device, wherein: the coating, embossing and punching device includes an upper liquid roller D, a coating roller E, an embossing convex roller A and a needle roller B. The upper liquid roller D is in contact with the hydrophobic agent in the liquid storage tank C. The coating roller E is in contact with the upper liquid roller D and the embossing convex roller A respectively. The embossing convex roller A is meshed with the needle roller B. The needle roller B has a punching needle area and a concave hole area. The punching needle area has a punching needle B2, and the concave hole area has a concave hole B1. Specifically, in the figure, the needle roller B has a punching needle B2 in the middle of the axial direction, and concave holes B1 at both ends respectively. The embossing roller A has embossed raised areas and recessed areas corresponding to the perforating needles B2 of the needle roller B. The recessed areas have recesses A2, and the embossed raised areas are located on both sides of the recessed areas. There is at least one row of embossed raised areas A1 distributed along the circumference of the embossing roller A. Specifically, in the illustration, the embossing roller A may have a recess A2 in the middle of its axial direction, and embossed raised areas A1 at both ends. In this embodiment, the coating roller E can be a brush roller or a sponge roller. The distribution of the brushes on the brush roller or the sponges on the sponge roller corresponds to the embossed raised areas of the embossing roller A. During operation, the hydrophobic agent in the liquid storage tank C is carried to the coating roller E via the upper liquid roller D. When the coating roller E and the embossing roller A come into contact, the hydrophobic agent is transferred to the embossing roller A. In this embodiment, the coating roller E is in full contact with the embossing roller A, that is, in contact with the bottom of the embossed raised areas A1 in the raised areas. When the upper nonwoven fabric 1 enters the embossing roller A and the needle roller B... During this process, the heated embossing roller A squeezes the fibers of the upper nonwoven fabric 1 into the concave hole B1 of the needle roller B. The fibers are melted and solidified to form a raised portion a1 and a flat portion a2. The hydrophobic agent on the embossing roller A is coated on the inner surface of the raised area a of the upper nonwoven fabric to form a hydrophobic coating c. That is, both the raised portion a1 and the flat portion a2 of the upper nonwoven fabric 1 have a hydrophobic coating c. At the same time, the perforating needle B2 on the heated needle roller B pierces the upper nonwoven fabric 1, and the fiber surface is melted and solidified to form a funnel-shaped opening b1.

[0038] (2) The upper nonwoven fabric 1 is coated, embossed and perforated before entering the composite device to be composited with the lower nonwoven fabric 2. The composite device is a composite roller F that meshes with the needle roller B. The surface of the composite roller F has a composite recess F1 corresponding to the perforation needle B2 of the needle roller B. During operation, the perforation needle B2 on the needle roller B pierces the upper nonwoven fabric 1 again through the funnel-shaped opening b1, and at the same time pierces the lower nonwoven fabric 2 that is stacked together. The fiber surface melts and solidifies to form the funnel-shaped opening b1 and the two nonwoven fabrics are composited together to form the anti-leakage composite nonwoven fabric 12.

[0039] The upper nonwoven fabric 1 and the lower nonwoven fabric 2 can also be laminated using hot melt adhesive or ultrasonic welding to increase the composite strength and make the bond between the two layers more secure.

[0040] This anti-leakage composite nonwoven fabric 12 can be used in absorbent products, including sanitary napkins, panty liners, and diapers. The absorbent product can consist of a top layer, an absorbent layer, and a bottom layer. The anti-leakage composite nonwoven fabric 12 is located on the top layer of the absorbent product. The open area b is located in the center of the absorbent area, and the raised areas a are located on both sides of the absorbent area. When a consumer uses the product, bodily fluids come into contact with the surface of the anti-leakage composite nonwoven fabric 12. The fluids can quickly penetrate into the absorbent layer through the open area b. Excess fluids can be prevented from further spreading to the sides and causing leakage by the blocking effect of the raised areas a. Furthermore, the inner surface of the raised areas a of the top nonwoven fabric 1 has a hydrophobic coating c, while the outer surface of the top nonwoven fabric 1 is hydrophilic. Compared to nonwoven fabrics with a hydrophobic coating on the outer surface of the raised areas a, bodily fluids can also be quickly absorbed by the hydrophilic fibers upon contact with the outer surface of the raised areas a. The hydrophobic coating c on the inner surface of the raised area a guides the fluid to the hydrophilic open-cell area b. This means that the body fluid is first absorbed and then guided inside the nonwoven fabric, further preventing the fluid from leaking out of the absorbent product. This also makes the raised area more effective as a leak-proof barrier, resulting in a drier feel during use. The hydrophobic coating c can be a functional hydrophobic coating, such as an antibacterial hydrophobic coating, which can also play an antibacterial and bactericidal role while preventing the side leakage of body fluid. The hydrophobic coating c can also be a colored hydrophobic coating, which can effectively increase the product's visual appeal and market competitiveness.

[0041] Example 2

[0042] like Figure 4 and Figure 5 As shown, this utility model discloses a leak-proof composite nonwoven fabric 12, which is composed of an upper nonwoven fabric 1 and a lower nonwoven fabric 2. The composite nonwoven fabric 12 has a raised area a and an opening area b. The opening area b has a plurality of funnel-shaped openings b1. The raised area a is located on both sides of the opening area b in the transverse direction and includes a raised portion a1 and a flat portion a2 extending longitudinally by at least one column. The raised portion a1 can be a continuous raised portion extending longitudinally or a plurality of discontinuous raised portions extending longitudinally. In embodiment 2, the raised portion a1 is a continuous raised portion extending longitudinally. The raised portion a1 has an independent internal space located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, that is, the raised portion a1 is hollow, and only the inner surface of the raised portion a1 of the upper nonwoven fabric 1 has a hydrophobic coating c. Wherein: the non-woven fabric can be hot-air non-woven fabric, spunbond non-woven fabric or spunlace non-woven fabric. In Example 2, the upper non-woven fabric is pure cotton spunlace non-woven fabric and the lower non-woven fabric is hot-air non-woven fabric.

[0043] like Figure 6As shown, the manufacturing method of the anti-leakage composite nonwoven fabric 12 of this utility model is the same as that of Example 1: In this example, the coating roller E only contacts the embossing protrusions A1 on the embossing roller A, that is, only the embossing protrusions A1 in the protruding area are covered with hydrophobic agent; when the upper nonwoven fabric 1 enters the coating embossing and punching device, the hydrophobic agent carried on the embossing protrusions A1 forms a hydrophobic coating c only on the inner surface of the protruding part a1 of the upper nonwoven fabric 1, that is, the protruding part a1 of the upper nonwoven fabric has a hydrophobic coating c, and the flat part a2 does not have a hydrophobic coating c.

[0044] In this embodiment 2, the hydrophobic coating c is only located on the inner surface of the raised portion a1 of the upper nonwoven fabric. During use, body fluid can quickly penetrate into the absorbent layer through the open area b, while excess body fluid can be prevented from further spreading to the sides and causing side leakage by the blocking effect of the raised areas a on both sides. Furthermore, the inner surface of the raised portion a1 of the upper nonwoven fabric has a hydrophobic coating c, while the outer surface of the upper nonwoven fabric is hydrophilic. Compared to nonwoven fabrics with a hydrophobic coating on the outer surface of the raised portion a, body fluid can also be quickly absorbed by the hydrophilic fibers on the surface of the raised area a and absorbed by the inner surface of the raised portion a1. The hydrophobic coating c guides the fluid to the adjacent flat portion a2 for absorption. This means the body fluid is first absorbed and then guided within the nonwoven fabric. Since the flat portion a2 is adjacent to both the perforated area b and the edge of the absorbent material, it can absorb excess fluid, further preventing leakage. This also makes the raised area a more effective leak-proof barrier. Furthermore, if the absorbed fluid is squeezed back into the upper nonwoven fabric, the hydrophobic coating c on the inner surface of the raised portion a1 prevents backflow, resulting in a drier feel. Additionally, during production, the two layers of nonwoven fabric are simultaneously embossed, perforated, coated, and laminated using a coating, embossing, and perforating device and a laminating device, reducing production steps and saving costs.

[0045] Example 3

[0046] like Figure 7 and Figure 8As shown, this utility model discloses a leak-proof composite nonwoven fabric 12, which is composed of an upper nonwoven fabric 1 and a lower nonwoven fabric 2. The composite nonwoven fabric 12 has a raised area a and an opening area b. The opening area b has a plurality of funnel-shaped openings b1 and a plurality of embossed protrusions b2. The raised area a is located on both sides of the opening area b in the transverse direction and includes a raised portion a1 and a flat portion a2, which are extended longitudinally by at least one row. A first funnel-shaped opening a3 is also distributed in the flat portion. The raised portion a1 can be a continuous protrusion extending longitudinally or a plurality of discontinuous protrusions extending longitudinally. In embodiment 3, the raised portion a1 is a continuous protrusion extending longitudinally. The raised portion a1 has an internal independent space located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, that is, the raised portion a1 is hollow, and a hydrophobic coating c is only on the inner surface of the raised portion a1 of the upper nonwoven fabric 1. Wherein: the nonwoven fabric can be hot-air nonwoven fabric, spunbond nonwoven fabric or spunlace nonwoven fabric. In Example 3, the upper nonwoven fabric is hot-air nonwoven fabric and the lower nonwoven fabric is spunbond nonwoven fabric.

[0047] like Figure 9 As shown, the manufacturing method of the anti-leakage composite nonwoven fabric in Example 3 is the same as that in Example 2, except that the embossing roller A has a first embossing protrusion A3 in the recessed area corresponding to the perforation needle B2 of the needle roller B. This first embossing protrusion A3 can form multiple embossed protrusions b2 in the opening area b of the anti-leakage composite nonwoven fabric 12. These embossed protrusions b2 can further reduce the contact area between the nonwoven fabric and the human body, reducing adhesion. Furthermore, the embossed protrusions b2 increase the three-dimensional thickness of the opening area b, playing a role in isolation and effectively preventing the backflow of body fluids. Alternatively, a second embossed protrusion B4 can be provided in the perforation needle area of ​​the needle roller B, such as... Figure 10 As shown, this creates multiple embossed recesses (not shown) in the perforated area b of the anti-leakage composite nonwoven fabric 12, which also reduces the contact area with the human body; the perforated area of ​​the needle roller B also has a first perforation needle B3, through which, as shown by the first perforation needle B3, Figure 9 and Figure 10 As shown, a first funnel-shaped opening a3 can be formed in the flat portion a2 of the raised area of ​​the anti-leakage composite nonwoven fabric 12. The first funnel-shaped opening a3 can accelerate the absorption of body fluid blocked by the raised portion and further prevent body fluid leakage.

[0048] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A leak-proof composite nonwoven fabric, characterized in that: The composite nonwoven fabric includes an upper nonwoven fabric and a lower nonwoven fabric; Both the upper and lower nonwoven fabrics are hydrophilic nonwoven fabrics. The composite nonwoven fabric has raised areas and perforated areas; The opening area has multiple funnel-shaped openings; The raised areas are located on both sides of the opening area laterally, and include at least one row of raised portions extending longitudinally and at least one row of flat portions extending longitudinally. The protruding portion has an independent internal space located between the upper nonwoven fabric and the lower nonwoven fabric; The upper nonwoven fabric has a hydrophobic coating on the inner surface of the raised area.

2. The anti-leakage composite nonwoven fabric as described in claim 1, characterized in that: The upper nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric; the lower nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

3. The anti-leakage composite nonwoven fabric as described in claim 1, characterized in that: The opening area also has multiple embossed protrusions or embossed depressions.

4. The anti-leakage composite nonwoven fabric as described in claim 1, characterized in that: The hydrophobic coating is located only on the inner surface of the raised portion of the raised area of ​​the upper nonwoven fabric.

5. The anti-leakage composite nonwoven fabric as described in claim 1, characterized in that: The hydrophobic coating is a functional hydrophobic coating and / or a colored hydrophobic coating.

6. The anti-leakage composite nonwoven fabric as described in claim 1, characterized in that: The flat portion of the raised area has a first funnel-shaped opening.

7. An absorbent article comprising the anti-leakage composite nonwoven fabric according to any one of claims 1-6, characterized in that: The anti-leakage composite nonwoven fabric is located on the surface of the absorbent product, wherein: the open area is located in the middle of the absorbent area of ​​the absorbent product, and the raised area is located on both sides of the absorbent area of ​​the absorbent product.

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