Double-layer non-woven fabric composite material structure and manufacturing device thereof

Abstract

The utility model discloses a double-layer non-woven fabric composite material structure and a manufacturing device thereof, and the double-layer non-woven fabric composite material structure comprises an upper-layer non-woven fabric and a lower-layer PE perforated film, the upper-layer non-woven fabric is a hydrophilic non-woven fabric, and bulges are arranged on the surface of the upper-layer non-woven fabric; a plurality of funnel-shaped micropores are formed in the surface of the PE perforated film; the number of the micropores is 20-1600 per square centimeter, and the area of the upper surface of each micropore is 0.03 mm < 2 >-2.5 mm < 2 >; the upper layer non-woven fabric and the lower layer PE punching film are firmly combined in a gluing, heat sealing or ultrasonic wave mode. The surface layer material can be applied to an absorption product, and the hydrophilic non-woven fabric is used on the upper layer and combined with the protrusions, so that body fluid can be quickly guided to the PE perforated film on the lower layer when the body fluid is in contact with the surface of the non-woven fabric. Due to the design of the PE perforated film, liquid can be quickly conducted to the absorption layer of the absorption product, the phenomenon that the liquid returns to the upper layer from the absorption layer can be effectively reduced through the funnel-shaped micropores, and the risk of back seepage is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of nonwoven fabrics, and in particular to a double-layer nonwoven composite material structure and its manufacturing apparatus. Background Technology

[0002] Hygiene products currently on the market, such as baby diapers and feminine hygiene pads, typically employ a multi-layered structure to absorb and control bodily fluids. Despite numerous designs attempting to reduce side leakage and backflow, a certain degree of backflow still occurs during actual use, impacting the user experience. This is particularly common after prolonged use, where liquid often flows back from the absorbent layer to the surface. This is because the existing design between the surface material and the absorbent layer fails to effectively prevent reverse liquid conduction. Utility Model Content

[0003] The purpose of this invention is to provide a double-layer nonwoven composite material structure and its manufacturing device, which can solve the above-mentioned technical problems and has the advantages of reducing backflow, improving user comfort and product performance.

[0004] To achieve the above objectives, the solution of this utility model is:

[0005] A double-layer nonwoven composite material structure includes an upper nonwoven fabric layer and a lower PE perforated film;

[0006] The upper non-woven fabric is a hydrophilic non-woven fabric, and the surface of the upper non-woven fabric has protrusions.

[0007] The PE perforated film has a number of funnel-shaped micropores on its surface; the number of micropores is 20 to 1600 per square centimeter, and the upper surface area of ​​a single micropore is 0.03 mm². 2 ~2.5mm 2 ;

[0008] The upper nonwoven fabric and the lower PE perforated film are firmly bonded together by adhesive bonding, heat sealing or ultrasonic bonding.

[0009] Furthermore, the upper nonwoven fabric is a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a hydroentangled nonwoven fabric.

[0010] Furthermore, an internal space is formed between the protrusions of the upper nonwoven fabric and the lower PE perforated film.

[0011] Furthermore, the double-layer nonwoven composite material also has several large holes running vertically through it, with each large hole c having a pore area of ​​2.5 mm². 2 ~40mm 2 The large holes are located between the protrusions.

[0012] Furthermore, the protrusion also has an opening.

[0013] This utility model also provides a manufacturing apparatus for manufacturing the aforementioned double-layer nonwoven composite material, including an embossing device and a composite device; the embossing device includes an embossing convex roller and a concave roller, wherein: the embossing convex roller has a plurality of embossing protrusions, and the concave roller has recesses corresponding to the embossing protrusions on the embossing convex roller; the embossing convex roller and the concave roller mesh with each other to form protrusions on the surface of the upper nonwoven fabric; the composite device is used to composite the unwound lower layer PE perforated film with the upper layer nonwoven fabric with the protrusions.

[0014] Furthermore, the composite device is an ultrasonic device, a composite roller, or a combination of a composite roller and a spraying device.

[0015] Furthermore, the composite device includes a composite roller; the composite roller, in conjunction with the concave roller of the embossing device, achieves hot-pressing composite between the upper nonwoven fabric and the lower PE perforated film.

[0016] Furthermore, the concave roller has perforation needles corresponding to the area between the embossing protrusions on the embossing convex roller; the composite roller has composite recesses corresponding to the perforation needles.

[0017] Furthermore, the embossing protrusions of the embossing roller also have needles.

[0018] By adopting the above technical solution, this utility model can be applied to the surface material of absorbent products such as sanitary napkins or diapers. By using a hydrophilic nonwoven fabric in the upper layer and combining it with a raised design, bodily fluids can be quickly guided to the lower PE perforated membrane when they come into contact with the nonwoven fabric surface. The design of the PE perforated membrane not only helps to quickly conduct liquid to the absorbent layer of the absorbent product, but the funnel-shaped micropores can also effectively reduce the phenomenon of liquid returning from the absorbent layer to the upper layer, significantly reducing the risk of backflow and greatly increasing the dryness and comfort of the absorbent product.

[0019] The manufacturing method provided by this utility model is simple and easy to implement, suitable for large-scale production, and will not significantly affect the overall breathability and comfort of the material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the double-layer nonwoven composite material structure of Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the O-O' cross-section of the double-layer nonwoven composite material structure of Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the production process of the double-layer nonwoven composite material structure in Embodiment 1 of this utility model;

[0023] Figure 4This is a schematic diagram of the double-layer nonwoven composite material structure of Embodiment 2 of this utility model;

[0024] Figure 5 This is a schematic diagram of the P-P' cross-section of the double-layer nonwoven composite material structure in Embodiment 2 of this utility model;

[0025] Figure 6 This is a schematic diagram of the production process of the double-layer nonwoven composite material structure in Embodiment 2 of this utility model;

[0026] Figure 7 This is a schematic diagram of the double-layer nonwoven composite material structure of Embodiment 3 of this utility model;

[0027] Figure 8 This is a schematic diagram of the Q-Q' cross-section of the double-layer nonwoven composite material structure in Embodiment 3 of this utility model;

[0028] Figure 9 This is a schematic diagram of the production process of the double-layer nonwoven composite material structure in Embodiment 3 of this utility model. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, this utility model discloses a double-layer nonwoven composite material structure 12 to reduce the risk of backflow, including an upper nonwoven fabric 1 and a lower PE perforated membrane 2; the upper nonwoven fabric 1 is a hydrophilic nonwoven fabric with protrusions a on its surface; the protrusions a have an internal space a1 located between the upper nonwoven fabric 1 and the lower PE perforated membrane 2; the lower PE perforated membrane 2 has funnel-shaped micropores b, with the number of micropores b being 20 to 1600 per square centimeter, and the upper surface area of ​​a single micropore b being 0.03 mm². 2 ~2.5mm 2 The upper surface area refers to the opening area of ​​the larger hole on the funnel-shaped micropore b. The upper nonwoven fabric 1 can be a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a hydroentangled nonwoven fabric. In Example 1, the upper nonwoven fabric 1 is a hot-air nonwoven fabric.

[0032] This utility model also provides a manufacturing apparatus for manufacturing the double-layer nonwoven composite material structure 12.

[0033] The manufacturing apparatus includes an embossing device and a composite device; specifically as follows: Figure 3 As shown, the double-layer nonwoven composite material structure 12 of this utility model can be combined with the above-mentioned manufacturing device and manufactured using the following method:

[0034] (1) The upper nonwoven fabric 1 enters the embossing device; wherein: the embossing device includes an embossing convex roller B and a concave roller A, wherein: the embossing convex roller B has a plurality of embossing protrusions B1, and the concave roller A has a recess A1 corresponding to the embossing protrusions B1 on the embossing convex roller B; during operation, the upper nonwoven fabric 1 enters between the embossing convex roller B and the concave roller A, the heated embossing convex roller B and the concave roller A mesh with each other, and the fiber surface is melted and solidified to form a protrusion a on the surface of the upper nonwoven fabric 1;

[0035] (2) After the lower PE perforated film 2 is unwound, it is combined with the upper nonwoven fabric 1 embossed in step (1) by a composite device. In this embodiment, the composite device adopts an ultrasonic device D to form the double-layer nonwoven composite material structure 12.

[0036] This double-layer nonwoven composite material structure 12 can be used in absorbent products, including sanitary napkins, panty liners, diapers, etc. The double-layer nonwoven composite material structure 12 can be located on the surface of the absorbent product. When consumers use the product, the upper nonwoven fabric 1 of the double-layer nonwoven composite material structure 12 has protrusions a that contain internal spaces. These protrusions a come into contact with the human body, reducing the contact area and forming a breathable barrier layer between the body and the absorbent product that prevents bodily fluids from contacting the skin. Even if the protrusions a are wetted by bodily fluids, the small contact area prevents them from sticking to the skin or causing a stuffy feeling. The lower PE perforated membrane 2 has several funnel-shaped micropores b on its surface. Bodily fluids can only permeate through these micropores b, while other areas are blocked. Therefore, during the absorption process, bodily fluids can quickly permeate through the micropores into the absorbent core layer, acting as a guide, and can also effectively prevent bodily fluids from returning to the upper nonwoven fabric 1, thus acting as a barrier and greatly increasing the dryness and comfort of the absorbent product.

[0037] Example 2

[0038] like Figure 4 and Figure 5As shown, this utility model discloses a double-layer nonwoven composite material structure 12 to reduce the risk of backflow, including an upper nonwoven fabric 1 and a lower PE perforated membrane 2; the upper nonwoven fabric 1 is a hydrophilic nonwoven fabric with protrusions a on its surface; the protrusions a have an internal space a1 located between the upper nonwoven fabric 1 and the lower PE perforated membrane 2; the lower PE perforated membrane 2 has funnel-shaped micropores b, with the number of micropores b being 20 to 1600 per square centimeter, and the upper surface area of ​​a single micropore being 0.03 mm². 2 ~2.5mm 2 Furthermore, the double-layer nonwoven composite material structure 12 also includes a large hole c penetrating the double-layer nonwoven composite material structure 12, and the pore area of ​​a single large hole c can be 2.5 mm. 2 ~40mm 2 The large hole c can be located between each protrusion a. The upper nonwoven fabric 1 can be hot-air nonwoven fabric, spunbond nonwoven fabric or hydroentangled nonwoven fabric. In Example 2, the upper nonwoven fabric 1 is spunbond nonwoven fabric.

[0039] like Figure 6 As shown, the double-layer nonwoven composite material structure 12 of this utility model can be manufactured by the following method:

[0040] (1) The upper nonwoven fabric 1 enters the embossing device; wherein: the embossing device includes an embossing convex roller B and a concave roller A, wherein: the embossing convex roller B has a plurality of embossing protrusions B1, the concave roller A has a recess A1 corresponding to the embossing protrusions B1 on the embossing convex roller B, and a perforating needle A2 corresponding to the area between the embossing protrusions B1; during operation, the upper nonwoven fabric 1 enters between the embossing convex roller B and the concave roller A, the heated embossing convex roller B and the concave roller A mesh with each other, and the fiber surface is melted and solidified to form a protrusion a on the surface of the upper nonwoven fabric 1, while the perforating needle A2 punctures the upper nonwoven fabric 1 to form a large hole in the upper layer;

[0041] (2) After the lower PE perforated film 2 is unwound, it is combined with the upper nonwoven fabric 1, which has been embossed and perforated in step (1), by the composite roller C under hot pressing. At the same time, the perforating needle A2 pierces the upper large hole again to form a large hole c that penetrates the double-layer nonwoven composite material structure. The composite roller C has a composite recess C1 corresponding to the perforating needle A2, thereby forming the double-layer nonwoven composite material structure 12.

[0042] The double-layer nonwoven composite material structure 12 combines the upper nonwoven fabric 1 and the lower PE perforated film through hot pressing. The large pores c that penetrate the double-layer nonwoven composite material structure 12 increase the fluid permeation channels, accelerate the fluid permeation rate, and improve the absorption performance of the double-layer nonwoven composite material structure 12.

[0043] Example 3

[0044] likeFigure 7 and Figure 8 As shown, this utility model discloses a double-layer nonwoven composite material structure 12 for reducing the risk of backflow, including an upper nonwoven fabric 1 and a lower PE perforated membrane 2; the upper nonwoven fabric 1 is a hydrophilic nonwoven fabric with protrusions a on its surface; the protrusions a have an internal space a1 located between the upper nonwoven fabric 1 and the lower PE perforated membrane 2, and the protrusions a also have openings d; the lower PE perforated membrane 2 has funnel-shaped micropores b, the number of micropores b is 20 to 1600 per square centimeter, and the upper surface area of ​​a single micropore b is 0.03 mm². 2 ~2.5mm 2 Furthermore, the double-layer nonwoven composite material structure 12 also includes a large hole c penetrating the double-layer nonwoven composite material structure 12. The upper nonwoven fabric 1 can be a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric. In Example 3, the upper nonwoven fabric 1 is a spunlace nonwoven fabric.

[0045] like Figure 9 As shown, the double-layer nonwoven composite material structure 12 of this utility model can be manufactured by the following method:

[0046] (1) The upper nonwoven fabric 1 enters the embossing device; wherein: the embossing device includes an embossing convex roller B and a concave roller A, wherein: the embossing convex roller B has a plurality of embossing protrusions B1 and needles B2 located on the embossing protrusions B1, and the concave roller A has a recess A1 on the embossing convex roller B corresponding to the embossing protrusions B1 and a perforating needle A2; during operation, the upper nonwoven fabric 1 enters between the embossing convex roller B and the concave roller A, the heated embossing convex roller B and the concave roller A mesh with each other, and the fiber surface is melted and solidified to form embossing protrusions a on the surface of the upper nonwoven fabric 1, and the embossing protrusions a have openings d formed by the needles B2, and at the same time the perforating needles A2 also pierce the upper nonwoven fabric 1 to form upper large holes;

[0047] (2) After the lower PE perforated film 2 is unwound, it undergoes a glue spraying process and is then laminated with the upper nonwoven fabric 1, which has been embossed and perforated in step (1), under the hot pressing action of the composite roller C. At the same time, the perforating needle A2 pierces the upper nonwoven fabric 1 and the lower PE perforated film 2 again at the upper large hole to form a large hole c that penetrates the double-layer nonwoven composite material structure. The composite roller C has a composite recess C1 corresponding to the perforating needle A2, thereby forming the double-layer nonwoven composite material structure 12. The glue spraying process can be carried out by spraying the glue onto the unwound PE perforated film 2 through a spraying device E located in front of the feed side of the composite roller C. This glue spraying process can use environmentally friendly hot melt adhesive, etc.

[0048] The double-layer nonwoven composite material structure 12 combines the upper nonwoven fabric 1 and the lower PE perforated film through a spraying process and hot pressing, increasing the composite strength of the double-layer nonwoven composite material structure 12 and reducing the risk of delamination between the upper and lower layers during use. The openings d on the protrusion a increase both the permeability of body fluids and the air permeability of the double-layer nonwoven composite material structure. The above description is only a preferred embodiment of this utility model. The scope of protection of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0049] In the description of the embodiments of this application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0050] Furthermore, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

Claims

1. A double-layer nonwoven composite material structure, characterized in that: It consists of an upper non-woven fabric layer and a lower PE perforated film layer; The upper non-woven fabric is a hydrophilic non-woven fabric, and the surface of the upper non-woven fabric has protrusions. The PE perforated film has a number of funnel-shaped micropores on its surface; the number of micropores is 20 to 1600 per square centimeter, and the upper surface area of ​​a single micropore is 0.03 mm². 2 ~2.5mm 2 .

2. The double-layer nonwoven composite material structure according to claim 1, characterized in that: The upper nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

3. The double-layer nonwoven composite material structure according to claim 1, characterized in that: An internal space is formed between the protrusions of the upper nonwoven fabric and the lower PE perforated film.

4. The double-layer nonwoven composite material structure according to claim 1, characterized in that: The double-layer nonwoven composite material also has several large holes running vertically through it, with each large hole c having a pore area of ​​2.5 mm². 2 ~40mm 2 The large holes are located between the protrusions.

5. The double-layer nonwoven composite material structure according to claim 1, characterized in that: The protrusion also has an opening.

6. A manufacturing apparatus for producing a double-layer nonwoven composite material structure as described in claim 1, characterized in that: The device includes an embossing apparatus and a laminating apparatus. The embossing apparatus comprises an embossing convex roller and a concave roller, wherein: the embossing convex roller has a plurality of embossing protrusions, and the concave roller has recesses corresponding to the embossing protrusions on the embossing convex roller; the embossing convex roller and the concave roller mesh with each other to form protrusions on the surface of the upper nonwoven fabric; the laminating apparatus is used to laminate the unwound lower PE perforated film with the upper nonwoven fabric with the protrusions formed.

7. The manufacturing apparatus for a double-layer nonwoven composite material structure according to claim 6, characterized in that: The composite device is an ultrasonic device, a composite roller, or a combination of a composite roller and a spraying device.

8. The manufacturing apparatus for a double-layer nonwoven composite material structure according to claim 6, characterized in that: The composite device includes a composite roller; the composite roller, in conjunction with the concave roller of the embossing device, achieves hot-pressing composite between the upper nonwoven fabric and the lower PE perforated film.

9. The manufacturing apparatus for a double-layer nonwoven composite material structure according to claim 8, characterized in that: The concave roller has perforating needles corresponding to the area between the embossing protrusions on the embossing convex roller; the composite roller has composite recesses corresponding to the perforating needles.

10. The manufacturing apparatus for a double-layer nonwoven composite material structure according to claim 8, characterized in that: The embossing protrusions of the embossing roller also have needles.

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