Novel breathable film

Abstract

The utility model relates to a novel breathable film which comprises a main body part, a plurality of adjusting parts recessed inwards are formed on the main body part, the main body part or the adjusting parts comprise a first SMS non-woven fabric layer and a melt-blown fabric layer, and the first SMS non-woven fabric layer and the melt-blown fabric layer are bonded through ultrasonic welding, hot pressing or hot melt adhesive. The breathable film is formed in the mode that the SMS non-woven fabric and the melt-blown fabric are combined, and the breathability of the paper diaper is greatly improved; furthermore, adjusting parts are formed on the breathable film through a hot pressing or ultrasonic technology, and the liquid barrier property can be improved on the premise that the breathability meets the requirement by means of the number and the shape of the adjusting parts. Therefore, the breathable film with good breathability and barrier property is obtained.

Description

Technical Field

[0001] This utility model relates to the field of diaper technology, specifically a novel breathable membrane. Background Technology

[0002] Currently, the breathable membrane used in most disposable diapers on the market is made by stretching a PE film with calcium carbonate powder to create pores for ventilation and moisture permeability. However, in actual use, this method is not ideal for wicking away moisture, resulting in a large amount of moisture remaining trapped inside the diaper. Prolonged wear can lead to the growth of bacteria and increase the risk of diaper rash and other adverse reactions.

[0003] To address the aforementioned issues, breathable membranes began to adopt composite structures, such as two sides made of low-grammage SMS nonwoven fabric and a middle layer of PTFE (polytetrafluoroethylene). This material has good breathability and water-proof properties, but due to the high price of PTFE, it cannot be widely used. Utility Model Content

[0004] The purpose of this invention is to provide a novel breathable membrane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel breathable membrane includes a main body with several inwardly recessed adjustment portions formed thereon. The main body or the adjustment portions include a first SMS nonwoven fabric layer and a meltblown fabric layer, which are ultrasonically welded, hot-pressed, or bonded with hot melt adhesive.

[0007] In one possible implementation, a second SMS nonwoven fabric layer is disposed below the meltblown fabric layer, and the second SMS nonwoven fabric layer and the meltblown fabric layer are bonded together by ultrasonic welding, hot pressing or hot melt adhesive.

[0008] In one possible implementation, the adjustment part is one or more of the following: dot-shaped, strip-shaped, polygonal.

[0009] In one possible implementation, the recess depth of the adjustment portion is 1 / 3 to 1 / 2 of the thickness of the main body portion.

[0010] In one possible implementation, the distance between each of the adjustment parts is 1 mm to 10 mm.

[0011] In one possible implementation, the basis weight of the first SMS nonwoven layer or the second SMS nonwoven layer is 5 to 20 g / m², and the basis weight of the meltblown fabric layer is 15 to 50 g / m².

[0012] In one possible implementation, the adjustment part is manufactured by hot pressing or ultrasonic processes.

[0013] In one possible implementation, several of the adjustment units are arranged in an array.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] By using a combination of SMS nonwoven fabric and meltblown fabric to form a breathable membrane, the breathability of the diaper is significantly improved. Furthermore, by using heat pressing or ultrasonic processes to form adjustment sections on the breathable membrane, the number and shape of these sections can be adjusted to improve liquid barrier properties while ensuring adequate breathability. This results in a breathable membrane that combines excellent breathability and barrier properties. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention. Figure 1 ;

[0018] Figure 3 for Figure 2 Sectional view along AA;

[0019] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention. Figure 2 . Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] In this invention, the use of meltblown fabric instead of PTFE increases the permeability of the breathable membrane, which may cause liquid to seep out of the breathable membrane. Therefore, the breathable membrane needs to be treated to increase its barrier properties while ensuring its breathability to prevent leakage.

[0022] like Figure 1 As shown in Embodiment 1, a novel breathable membrane includes a main body 1, on which several inwardly recessed adjustment portions 2 are formed. The main body 1 or the adjustment portions 2 include a first SMS nonwoven fabric layer 11 and a meltblown fabric layer 12, which are bonded together by ultrasonic welding, hot pressing or hot melt adhesive.

[0023] Example 2, as Figure 2As shown, this embodiment is an improvement on the first embodiment. A second SMS nonwoven fabric layer 13 is added below the meltblown fabric layer 12. The first nonwoven fabric layer 11, the meltblown fabric layer 12 and the second SMS nonwoven fabric layer 13 are bonded together by ultrasonic welding, hot pressing or hot melt adhesive to form a sandwich structure.

[0024] In either Embodiment 1 or Embodiment 2, the adjustment part 2 is one or more of the following: dot-shaped, strip-shaped, or polygonal. The following description uses Embodiment 2 as an example to illustrate a typical adjustment part structure. Figure 1 and Figure 2 An embodiment in which the adjustment section 2 is strip-shaped is given. Figure 4 An embodiment in which the adjusting part 2 is in the shape of a dot is given. The specific shape of the adjusting part is not particularly limited in this invention; the aforementioned shapes are merely preferred embodiments. To effectively adjust the air permeability and barrier properties of the breathable membrane, several of the adjusting parts 2 are arranged in an array. This array arrangement can be rapidly fabricated online using hot pressing or ultrasonic processes.

[0025] For the breathable membrane of this utility model, the depth of the adjustment part 2, the spacing between each adjustment part 2, and the basis weight of the SMS nonwoven fabric and meltblown fabric used will all affect the breathability and barrier properties. As a preferred embodiment, the recess depth of the adjustment part 2 is 1 / 3 to 1 / 2 of the thickness of the main body 1; the distance between each adjustment part 2 is 1 mm to 10 mm; the basis weight of the first SMS nonwoven fabric layer 11 or the second SMS nonwoven fabric layer 13 is 5 to 20 g / m², and the basis weight of the meltblown fabric layer 12 is 15 to 50 g / m².

[0026] In this invention, if the recess depth of the adjustment part 2 is too shallow, the liquid will overflow from the adjustment part 2 into the main body part 1. Since the permeability of the main body part 1 is better than that of the adjustment part 2, the liquid will leak out and fail to prevent seepage. If the recess depth is too deep, the overall mechanical properties of the breathable membrane will be reduced, and it will be easily damaged.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A novel breathable film characterized in that, The application relates to a main body (1) provided with a plurality of inwardly recessed adjusting portions (2), wherein the main body (1) or the adjusting portions (2) comprise a first SMS non-woven fabric layer (11) and a melt-blown fabric layer (12), and the first SMS non-woven fabric layer (11) and the melt-blown fabric layer (12) are bonded by ultrasonic welding, hot pressing or hot melt glue. The recessed depth of the adjusting portions (2) is 1 / 3-1 / 2 of the thickness of the main body (1). The distance between the adjusting portions (2) is 1-10 mm.

2. The novel breathable film according to claim 1, characterized in that, The melt-blown fabric layer (12) is provided below with a second SMS non-woven fabric layer (13), and the second SMS non-woven fabric layer (13) and the melt-blown fabric layer (12) are bonded by ultrasonic welding, hot pressing or hot melt glue.

3. The novel breathable film according to claim 1, wherein, The adjusting portions (2) are in one or more of the following forms: dots, strips and polygons.

4. The novel breathable film according to claim 2, wherein, The grammage of the first SMS non-woven fabric layer (11) or the second SMS non-woven fabric layer (13) is 5-20 g / m2, and the grammage of the melt-blown fabric layer (12) is 15-50 g / m2.

5. The novel breathable film according to claim 1, wherein The adjusting portions (2) are prepared by hot pressing or ultrasonic process.

6. The novel breathable film according to claim 1, wherein The adjusting portions (2) are arranged in an array.

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