A production process for antibacterial ultra-soft nonwoven fabric

Abstract

This application relates to a production process for antibacterial ultra-soft nonwoven fabric, belonging to the technical field of nonwoven fabrics. The process includes a hydroentangling step, in which a skeleton layer and a surface layer are formed, with the surface layer located on both sides of the skeleton layer and connected to it via hydroentangling. A drying step is then performed to dry the hydroentangled nonwoven fabric to a moisture content of 9%-10%. An antibacterial step is followed by the use of an attachment roller with an antibacterial solution adhering to its surface, with the nonwoven fabric in contact with the roller's surface. Finally, a drying step is performed to dry the nonwoven fabric that has absorbed the antibacterial solution. This application has the advantage of low energy consumption in drying the nonwoven fabric.

Description

Technical Field

[0001] This application relates to the technical field of nonwoven fabrics, and in particular to a production process for an antibacterial ultra-soft nonwoven fabric. Background Technology

[0002] In the production process of nonwoven fabrics, in order to achieve functional purposes, such as antibacterial purposes, antibacterial solutions are usually sprayed onto the nonwoven fabrics to give them antibacterial properties. However, the existing spraying methods require a long time to dry the nonwoven fabrics after spraying, resulting in high energy consumption. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a production process for antibacterial ultra-soft nonwoven fabric, which has the advantage of low energy consumption for drying nonwoven fabric.

[0004] The above-mentioned objective of this application is achieved through the following technical solution:

[0005] A process for producing antibacterial ultra-soft nonwoven fabric includes a hydroentangling step, in which a skeleton layer and a surface layer are included, with the surface layer located on both sides of the skeleton layer and connected to the skeleton layer by hydroentangling; a drying step, in which the hydroentangled nonwoven fabric is dried to a moisture content of 9%-10%; an antibacterial step, in which an attachment roller is used, with an antibacterial solution adhering to the surface of the attachment roller, and the nonwoven fabric and the surface of the attachment roller are in contact; and a drying step, in which the nonwoven fabric adsorbed with the antibacterial solution is dried.

[0006] By adopting the above technical solution, since the moisture content of the nonwoven fabric is 9%-10% after drying, the antibacterial solution attached to the surface of the attachment roller is more likely to enter the nonwoven fabric when passing through the attachment roller. Compared with the spraying method, since the nonwoven fabric is in direct contact with the antibacterial solution attached to the roller surface, the absorption of liquid by the nonwoven fabric is more uniform, and the liquid attached to the roller surface is limited. Therefore, while achieving a good antibacterial solution adsorption effect, the absorption of liquid is less, resulting in lower energy consumption during drying.

[0007] In a preferred embodiment, the present application may be further configured such that: the attachment roller is hollow, the attachment roller is also provided with a discharge hole, the discharge hole is connected to the internal cavity of the attachment roller, the surface of the attachment roller is provided with an adsorption layer, the adsorption layer covers the discharge hole, and the atomized antibacterial solution passes through the internal cavity of the attachment roller and adheres to the adsorption layer from the discharge hole.

[0008] By adopting the above technical solution, during use, the mist-like antibacterial solution enters into the hollow attachment roller and is discharged from the discharge hole. It is then adsorbed by the adsorption layer. When the nonwoven fabric comes into contact with the adsorption layer, the liquid on the adsorption layer is transferred to the nonwoven fabric, thereby making the adsorption of liquid on the nonwoven fabric more uniform.

[0009] In a preferred embodiment, this application may further be configured to include a squeeze roller disposed below the adhesion roller for squeezing the adsorption layer.

[0010] By adopting the above technical solution, the presence of the extrusion roller enables control over the amount of liquid on the adhesion layer, thereby reducing the probability of excessive liquid adhering to the adhesion layer and causing excessive liquid adsorption on the nonwoven fabric.

[0011] In a preferred embodiment, this application may be further configured to include an inspection step, which is used to detect the amount of liquid flowing down from the extrusion roller per unit time and make a judgment. If the amount of liquid is greater than a preset value A, an atomization abnormality alarm is triggered.

[0012] By adopting the above technical solution, since the squeezing roller is located below the attachment roller, when there is a large amount of liquid in the atomized antibacterial solution, it will gather at the bottom inside the attachment roller and be discharged from the discharge hole under the action of gravity. It will be adsorbed by the adsorption layer located below, resulting in more antibacterial solution in that part. At this time, the presence of the squeezing roller can squeeze out the excess antibacterial solution. Therefore, when the amount of liquid per unit time is greater than the preset value A, it indicates that there are more large droplets in the atomized antibacterial solution and the atomization effect is poor.

[0013] In a preferred embodiment, this application can be further configured to trigger a solution shortage alarm if the liquid volume is less than a preset value B.

[0014] By adopting the above technical solution, when the liquid volume is less than the preset value B, it indicates that less liquid is squeezed out from the adhesion layer by the extrusion roller. Therefore, it can be known that the amount of mist-like antibacterial liquid entering the adhesion roller is less, so it is necessary to issue a solution shortage notification.

[0015] In a preferred embodiment, this application may be further configured such that the wrap angle between the nonwoven fabric and the attachment roller is not less than 90 degrees.

[0016] By adopting the above technical solution, the contact time between the nonwoven fabric and the adhesive layer is longer, thus making the solution penetrate the nonwoven fabric better.

[0017] In a preferred embodiment, this application can be further configured such that, in the drying step, the moisture content of the dried nonwoven fabric is 11%-13%.

[0018] By adopting the above technical solution, the moisture content of the nonwoven fabric after drying is greater than that before the antibacterial step, thus leaving more antibacterial solution on the nonwoven fabric and also making the nonwoven fabric feel better.

[0019] In a preferred embodiment, this application may be further configured such that: the length of the fibers constituting the surface layer is less than the length of the fibers constituting the skeleton layer, the diameter of the fibers constituting the surface layer is less than the diameter of the fibers constituting the skeleton layer, and the thickness of the surface layer is greater than the thickness of the skeleton layer.

[0020] By adopting the above technical solution, during the adsorption process of the antibacterial solution, since the fiber length and diameter of the surface layer are smaller than the limiting length and diameter of the skeleton layer, and the thickness of the surface layer is greater than the thickness of the skeleton layer, the surface layer has a better adsorption effect on the antibacterial solution. That is, under the same area and volume conditions, the amount of antibacterial solution adsorbed by the surface layer is greater than that adsorbed by the skeleton layer. Therefore, the antibacterial effect is better in use, and the consumption of antibacterial solution is reduced, and the drying energy consumption is reduced. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this application.

[0022] Reference numerals: 1. Adhesion roller; 2. Extrusion roller. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1This application discloses a process for producing antibacterial ultra-soft nonwoven fabric, including an attachment roller 1 and a squeeze roller 2. The attachment roller 1 is hollow and has a discharge hole connected to the internal cavity of the attachment roller 1. An adsorption layer is provided on the surface of the attachment roller 1, covering the discharge hole. Atomized antibacterial solution passes through the internal cavity of the attachment roller 1 and adheres to the adsorption layer from the discharge hole. The squeeze roller 2 is located below the attachment roller 1 and is used to squeeze the adsorption layer. In this embodiment, multiple attachment rollers 1 are provided above and below the nonwoven fabric. The amount of atomized antibacterial solution passed through the attachment roller 1 above the nonwoven fabric per unit time is less than the amount passed through the attachment roller 1 below the nonwoven fabric per unit time. The squeeze roller 2 is only located below the attachment roller 1 located below the nonwoven fabric. Multiple attachment rollers 1, positioned above and below the nonwoven fabric, are arranged at intervals along the conveying direction. In this arrangement, the auxiliary roller above the nonwoven fabric is the first, and the attachment roller 1 below the nonwoven fabric is the second. During use, one or more of the upper / lower attachment rollers 1 can be adjusted to contact the nonwoven fabric as needed. The atomized antibacterial solution entering the attachment roller 1 can be atomized by an atomizing nozzle located inside the attachment roller 1, or it can be atomized outside the attachment roller 1 and then conveyed into the attachment roller 1. Both the attachment roller 1 and the extrusion roller 2 are driven to rise and fall by a drive mechanism such as a cylinder or hydraulic cylinder.

[0025] The production process in this application includes a hydroentangling step, in which a skeleton layer and a surface layer are included. The surface layer is located on both sides of the skeleton layer, and the surface layer and the skeleton layer are connected by hydroentangling. A drying step is performed to dry the hydroentangled nonwoven fabric to a moisture content of 9%-10%. An antibacterial step is then performed, in which an attachment roller 1 is used. The surface of the attachment roller 1 is coated with an antibacterial solution, and the surfaces of the nonwoven fabric and the attachment roller 1 are in contact, with a wrap angle of not less than 90 degrees. A final drying step is performed to dry the nonwoven fabric that has absorbed the antibacterial solution, resulting in a moisture content of 11%-13%. In this embodiment, the skeleton layer includes, but is not limited to, viscose fiber, wood pulp fiber, etc., and the surface layer includes, but is not limited to, microfiber, etc. The length of the fibers constituting the surface layer is shorter than the length of the fibers constituting the skeleton layer, the diameter of the fibers constituting the surface layer is smaller than the diameter of the fibers constituting the skeleton layer, and the thickness of the surface layer is greater than the thickness of the skeleton layer.

[0026] It also includes an inspection step, which is used to detect the amount of liquid flowing down from the extrusion roller 2 per unit time and make a judgment. If the amount of liquid is greater than the preset value A, an atomization abnormality alarm is triggered; if the amount of liquid is less than the preset value B, an insufficient solution alarm is triggered.

[0027] If the liquid volume exceeds the preset value A, an atomization anomaly alarm is triggered. The attachment rollers 1 currently in contact with the nonwoven fabric are then sequentially stopped, while the other attachment roller 1 on the same side begins operation. Taking the atomizing nozzle located within the attachment rollers 1, and only the upper and lower attachment rollers 1 operating as an example, when the liquid volume exceeds the preset value A, the upper attachment roller 1 stops operation, and the upper second attachment roller 1 starts operation. The amount of liquid generated by the squeezing roller 2 at the lower first attachment roller 1 is then detected. If it exceeds the preset value A, it indicates a deterioration in the atomization effect within the lower first attachment roller 1; if it does not exceed the preset value A, it indicates a deterioration in the atomization effect within the upper first attachment roller 1. The results are then communicated. For more accurate judgment, after the above test results, the operation of the lower first attachment roller 1 can be stopped, and the operation of the lower second attachment roller 1 can be started for further evaluation, making the judgment more accurate.

[0028] The implementation principle of this embodiment is as follows: when applying solution to nonwoven fabric, the antibacterial solution is applied to the surface of the nonwoven fabric by setting up the application roller 1. The amount of solution applied inside the nonwoven fabric is small, so the energy consumption required during drying is smaller.

[0029] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A process for producing an antibacterial super-soft nonwoven fabric, characterized by: The method comprises a water jetting step, a drying step, an antibacterial step, and a drying step.

2. The process for producing an antibacterial super-soft nonwoven fabric according to claim 1, characterized in that: The water jetting step comprises a skeleton layer and a surface layer, the surface layer is located on both sides of the skeleton layer, and the surface layer and the skeleton layer are connected by water jetting.

3. The process for producing an antibacterial super-soft nonwoven fabric according to claim 2, characterized in that: The drying step is used to dry the non-woven fabric after water jetting, so that the water content is 9%-10%.

4. The process for producing an antibacterial super-soft nonwoven fabric according to claim 3, characterized in that: In the antibacterial step, an attachment roller (1) is used, the surface of the attachment roller (1) is attached with an antibacterial solution, the non-woven fabric is in contact with the surface of the attachment roller (1), and the drying step is used to dry the non-woven fabric after absorbing the antibacterial solution.

5. The process for producing an antibacterial super-soft nonwoven fabric according to claim 1, characterized in that: The attachment roller (1) is hollow, and the attachment roller (1) is further provided with a discharge hole. The discharge hole is in communication with the internal cavity of the attachment roller (1), the surface of the attachment roller (1) is provided with an adsorption layer, the adsorption layer covers the discharge hole, the atomized antibacterial solution passes through the internal cavity of the attachment roller (1) and is attached to the adsorption layer from the discharge hole. The wrap angle between the non-woven fabric and the attachment roller (1) is not less than ninety degrees. The length of the fiber constituting the surface layer is less than the length of the fiber constituting the skeleton layer, the diameter of the fiber constituting the surface layer is less than the diameter of the fiber constituting the skeleton layer, and the thickness of the surface layer is greater than the thickness of the skeleton layer. The method further comprises an extrusion roller (2) arranged below the attachment roller (1) for extruding the adsorption layer. The method further comprises an inspection step for detecting the amount of liquid flowing from the extrusion roller (2) per unit time and making a judgment. If the amount of liquid is greater than a preset value A, an atomization abnormality alarm is given. If the amount of liquid is less than a preset value B, a solution shortage alarm is given. In the drying step, the water content of the dried non-woven fabric is 11%-13%.

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