A low-shedding, washable spunlace nonwoven fabric and its preparation process

Abstract

This application relates to a low-shedding, washable spunlace nonwoven fabric and its preparation process, belonging to the technical field of nonwoven fabrics. It includes a matrix with embossed areas, the matrix being composed of cellulose fibers, and the embossed areas accounting for X% of the matrix area (0 < X ​​≤ 20). This application has the advantage of reducing the significant pressure on the environment and urban sewage pipes.

Description

Technical Field

[0001] This application relates to the technical field of nonwoven fabrics, and in particular to a low-shedding, washable spunlace nonwoven fabric and its preparation process. Background Technology

[0002] Spunlace nonwoven fabric is produced by spraying high-pressure micro-jet water onto one or more layers of fiber web, causing the fibers to entangle and thus strengthening the web to a certain strength. The resulting fabric is called spunlace nonwoven fabric. Its fiber raw materials are widely available, including polyester, nylon, polypropylene, viscose fiber, chitosan fiber, microfiber, Tencel, silk, bamboo fiber, wood pulp fiber, seaweed fiber, etc.

[0003] Spunlace nonwoven fabric is used in hygiene and cleaning products such as wet wipes and wet paper wipes. However, nonwoven fabrics tend to shed fibers during use. Chinese invention patent CN107700071A discloses a spunlace composite nonwoven fabric production process that reduces the probability of fiber shedding. However, the widespread use of hygiene products such as wet wipes and wet paper wipes puts significant pressure on the environment and urban sewage systems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a low-shedding, washable spunlace nonwoven fabric and its preparation process, which has the advantage of reducing the pressure on the environment and urban sewage pipes.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] A low-shedding, washable spunlace nonwoven fabric includes a matrix with an embossed area. The matrix is ​​composed of cellulose fibers, and the area of ​​the embossed area accounts for X% of the matrix area, where 0 < X ​​≤ 20. In this application, the cellulose fibers may include viscose fibers and wood pulp fibers.

[0007] By adopting the above technical solution, the matrix is ​​biodegradable due to its cellulose composition, and the presence of embossing makes the matrix dissolve in water more effectively and faster.

[0008] In a preferred example, this application can be further configured as follows: 5 ≤ X ≤ 15.

[0009] By adopting the above technical solution, when 5≤X≤15, the matrix can have a good dispersion effect.

[0010] In a preferred embodiment, the present application may be further configured such that: the substrate includes a core region and an edge region, the embossed area of ​​the edge region is larger than the embossed area of ​​the core region, and the core region is centrally located on the substrate.

[0011] By adopting the above technical solution, the embossed area of ​​the core area is small during use, which enables users to maintain a good user experience.

[0012] In a preferred embodiment, this application may be further configured such that the embossing is mesh-like, dividing the substrate into multiple independent regions.

[0013] By adopting the above technical solution, the nonwoven fabric achieves better dispersion during the flushing process.

[0014] This application also discloses a process for preparing low-shedding, washable spunlace nonwoven fabric, including a slitting step. The slitting step includes an inspection system, which comprises a sampling module, a comparison module, and a prompting module. The sampling module collects data from the substrate and sends the collected information to the comparison module. The comparison module compares the collected information with a standard. When the collected information is inconsistent with the standard, it sends a prompt signal to the prompting module. Upon receiving the prompt signal, the prompting module provides a prompt.

[0015] By adopting the above technical solution, the fabric blank is cut in the slitting step, so that the substrate is separated from the fabric blank. The sampling inspection module performs sampling inspection on the substrate and sends the information collected by the sampling inspection to the comparison module. After receiving the collected information, the comparison module compares it. If it is inconsistent with the standard information, it sends a prompt signal to the prompt module. After receiving the prompt signal, the prompt module provides a prompt. Therefore, it can effectively reduce the probability of defective products entering the market.

[0016] In a preferred embodiment, this application may be further configured to include an embossing step, wherein the embossing step is used to emboss the fabric blank and to represent the edge of the core area through embossing, and the information collected by the comparison module includes the distance between the edge of the core area and the edge of the substrate.

[0017] By adopting the above technical solution, it is possible to determine whether there is a deviation in the position of the substrate during the cutting process by measuring the distance between the core area and the edge.

[0018] In a preferred embodiment, the present application may be further configured such that: the inspection system further includes a counting module; when the comparison module compares the collected information with the standard, when a deviation occurs in the distance in the left-right direction, it sends a correction signal to the prompting module; when a deviation occurs in the distance in the front-back direction, it sends a winding speed signal to the prompting module; and the counting module is used to count the number of times the correction signal and the winding speed signal occur.

[0019] By adopting the above technical solution, when a deviation occurs in the left-right direction, it indicates that the fabric may be misaligned; when a deviation occurs in the front-back direction, it indicates that there may be a deviation in the unwinding speed.

[0020] In a preferred embodiment, this application can be further configured such that: the inspection system further includes a query module, which is used to query and judge the number of occurrences of the correction signal and the winding speed signal in the counting module; when the number of occurrences of the correction signal is greater than a preset value, a deviation signal is sent to the prompting module; when the number of occurrences of the winding speed signal is greater than a preset value, a stall signal is sent to the prompting module.

[0021] By adopting the above technical solution, when the correction signal or winding speed signal appears multiple times, it indicates that the fabric conveying device may be malfunctioning and needs to be inspected.

[0022] In a preferred embodiment, this application can be further configured such that: after receiving a stall signal, the prompting module queries the motor speed; if the motor speed is normal, a tension prompt is issued.

[0023] By adopting the above technical solution, when the prompting module receives a stall signal, it queries the motor speed. If the motor speed is normal, it indicates that there is no fault in the motor.

[0024] In a preferred embodiment, this application can be further configured such that: if the motor speed is normal, the prompting module queries the roller tension; if it is normal, a tension abnormality prompt is issued.

[0025] By adopting the above technical solution, when the motor is not faulty, the tension of the roller is checked. When the tension of the roller meets the requirements, it indicates that the probability of fabric slippage is low, and the probability is that the tensile strength of the fabric does not meet the requirements. This will prompt an abnormal tension, enabling the operator to inspect the fabric. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the matrix structure of this application.

[0027] Figure 2 This is a schematic diagram of the testing system principle of this application.

[0028] Figure 3 This is a 4-minute dispersion rate graph for this application.

[0029] Reference numerals: 1. Matrix; 11. Edge region; 12. Core region; 21. Sampling module; 22. Comparison module; 23. Counting module; 24. Prompt module; 25. Query module. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1-3 This application discloses a low-shedding, washable spunlace nonwoven fabric, comprising a matrix 1 made of cellulose fibers, which can be wood pulp fibers or viscose fibers. An embossed area is also provided on the matrix 1, the area of ​​which accounts for X% of the area of ​​the matrix 1, where 0 < X ​​≤ 20. More specifically, 5 ≤ X ≤ 15. The matrix 1 includes a core region 12 and an edge region 11. The core region 12 is rectangular in shape, and the embossed area of ​​the edge region 11 is larger than that of the core region 12. The core region 12 is centrally located on the matrix 1. The embossing is mesh-like, dividing the matrix 1 into multiple independent regions. In this embodiment, the edge of the core region 12 is represented by linear embossing.

[0032] This application also discloses a process for preparing low-shedding, washable spunlace nonwoven fabric, including an embossing step and a slitting step. The embossing step is used to emboss the fabric blank. The slitting step includes an inspection system, which includes a sampling module 21, a comparison module 22, a counting module 23, a query module 25, and a prompting module 24. The sampling module 21 is used to collect data from the substrate 1 and send the collected information to the comparison module 22. The comparison module 22 compares the collected information with a standard. When the collected information is inconsistent with the standard, a prompt signal is sent to the prompting module 24. The prompting module 24 provides a prompt after receiving the prompt signal.

[0033] The information collected by the comparison module 22 includes the distance between the edge of the core area 12 and the edge of the substrate 1, that is, the distance M between one side of the edge of the core area 12 and the side of the substrate 1 in the left-right direction, and the distance N between one side of the edge of the core area 12 and the side of the substrate 1 in the front-back direction.

[0034] The comparison module 22 compares the collected information with the standard. If there is a deviation in the distance in the left and right directions, that is, if there is a deviation between M and the standard value, a correction signal is sent to the prompting module 24. If there is a deviation in the distance in the front and back directions, that is, if there is a deviation between N and the standard value, a roll speed signal is sent to the prompting module 24. The counting module 23 is used to count the number of times the correction signal and the roll speed signal appear.

[0035] The query module 25 is used to query and judge the number of occurrences of the correction signal and the roll speed signal in the counting module 23. When the number of occurrences of the correction signal is greater than the preset value, a deviation signal is sent to the prompt module 24. When the number of occurrences of the roll speed signal is greater than the preset value, a stall signal is sent to the stall prompt module 24.

[0036] When the number of correction signals exceeds a preset value, it indicates that the fabric has repeatedly exhibited abnormal positioning in the left-right direction. Therefore, the equipment used for fabric conveying needs to be inspected and repaired during this process. When the number of winding speed signals exceeds a preset value, it indicates that the fabric has repeatedly exhibited abnormal positioning in the front-back direction. Therefore, the equipment used for fabric conveying also needs to be inspected and repaired.

[0037] The fabric conveying equipment includes an unwinding frame for unwinding the fabric, a roller conveyor for conveying the fabric, and a tensioning device for holding the fabric and keeping it taut. The tensioning device includes a moving roller and a fixed roller. The moving roller is driven by a cylinder or an electric push rod to apply pressure to the fabric passing through the fixed roller. After receiving a stall signal, the prompting module 24 checks the motor speed. If the motor speed is abnormal, a stall warning is issued. If the motor speed is normal, the prompting module 24 checks the roller tension (i.e., whether the current position of the moving roller meets the requirements). If it meets the requirements, a tension abnormality warning is issued. If it does not meet the requirements, a tension abnormality warning is issued.

[0038] The implementation principle of this embodiment is as follows: by adjusting the embossing area during use, the non-woven fabric can be dissolved more easily and quickly, reducing the pressure on the environment and pipelines. At the same time, by inspecting the substrate 1, the probability of defective products entering the market can be greatly reduced.

[0039] 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 preparing low-shedding, washable spunlace nonwoven fabric, characterized in that: The nonwoven fabric includes a substrate (1), on which an embossed area is provided. The substrate (1) is composed of cellulose fibers. The area of ​​the embossed area accounts for X% of the area of ​​the substrate (1), 0 < X ​​≤ 20. The substrate (1) includes a core area (12) and an edge area (11). The embossed area of ​​the edge area (11) is larger than the embossed area of ​​the core area (12). The core area (12) is centrally located on the substrate (1). The preparation process includes a slitting step, which includes an inspection system. The inspection system includes a sampling module (21), a comparison module (22), and a prompting module (24). The sampling module (21) is used to collect data from the substrate (1) and send the collected information to the comparison module (22). The comparison module (22) compares the collected information with a standard. When the collected information is inconsistent with the standard, a prompt signal is sent to the prompt module (24). The prompt module (24) provides a prompt after receiving the prompt signal. The system also includes an embossing step, which is used to emboss the fabric blank and to emboss the edge of the core area (12). The information collected by the sampling module (21) includes the distance between the edge of the core area (12) and the edge of the substrate (1). The inspection system also includes a counting module (23). When the comparison module (22) compares the collected information with the standard, it sends a correction signal to the prompt module (24) when there is a deviation in the distance in the left and right directions, and sends a winding speed signal to the prompt module (24) when there is a deviation in the distance in the front and back directions. The counting module (23) is used to count the number of times the correction signal and the winding speed signal appear.

2. The process for preparing a low-shedding, washable spunlace nonwoven fabric according to claim 1, characterized in that: The inspection system also includes a query module (25), which is used to query and judge the number of times the correction signal and the roll speed signal appear in the counting module (23). When the number of times the correction signal appears is greater than a preset value, a deviation signal is sent to the prompt module (24). When the number of times the roll speed signal appears is greater than a preset value, a stall signal prompt module (24) is sent.

3. The process for preparing a low-shedding, washable spunlace nonwoven fabric according to claim 2, characterized in that: After receiving the stall signal, the prompting module (24) checks the motor speed. If the motor speed is normal, it provides a tension prompt.

4. The process for preparing a low-shedding, washable spunlace nonwoven fabric according to claim 3, characterized in that: If the motor speed is normal, the prompt module (24) will check the roller tension. If it is normal, a tension abnormality prompt will be issued.

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