Preparation device of high-barrier breathable non-woven fabric

Abstract

This utility model discloses a preparation device for high-barrier, breathable nonwoven fabric, including a first reactor and an activator. The activator is disposed inside the first reactor or upstream of the first reactor. The activator includes an ultraviolet lamp. The first reactor includes a first housing with a reaction space inside. A first inlet and a first outlet are respectively disposed on opposite side walls of the first housing. A first roller and a fourth roller are respectively disposed inside the first inlet and the first outlet. A second roller and a third roller are disposed at intervals below the reaction space. The nonwoven fabric substrate is activated under the ultraviolet light of the activator. The activated nonwoven fabric substrate is continuously rotated within the first reactor by the first, second, third, and fourth rollers. During the rotation, it reacts with the modifying liquid in the first reactor, improving the barrier and breathability of the nonwoven fabric. Continuous modification of the nonwoven fabric can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric production technology, specifically to a device for preparing high-barrier, breathable nonwoven fabric. Background Technology

[0002] Nonwoven fabric, also known as non-woven textile, is a type of fabric formed without spinning or weaving. It is made by arranging short or long fibers in a directional or random pattern to form a web structure, which is then reinforced using mechanical, thermal, or chemical methods. Nonwoven fabric breaks through the traditional principles of textile manufacturing and is widely used in various fields such as medical and health care, home decoration, industrial materials, and agricultural textiles. High-barrier, breathable nonwoven fabrics have excellent filtration effects and are widely used in masks, filters, and disinfection cloth bags.

[0003] Currently, high-barrier, breathable nonwoven fabrics are made by coupling certain copolymers onto a nonwoven substrate to improve the high-barrier, breathable properties of the nonwoven substrate. For example, CN117867855A involves reacting a polypropylene nonwoven substrate to form a barrier material, but the method of continuous production is not disclosed. Utility Model Content

[0004] To address the aforementioned technical problems in the existing technology, this utility model provides a device for preparing high-barrier, breathable nonwoven fabric, in which the nonwoven fabric is continuously transferred in a first reactor and simultaneously immersed in the first reactor for reaction, thereby enabling continuous production.

[0005] This utility model discloses a preparation device for high-barrier breathable nonwoven fabric, including a first reactor and an activator; the activator is disposed inside the first reactor or upstream of the first reactor; the activator includes an ultraviolet lamp; the first reactor includes a first box, and a reaction space is disposed inside the first box; a first inlet and a first outlet are respectively disposed on opposite side walls of the first box; a first roller and a fourth roller are respectively disposed inside the first inlet and the first outlet; and a second roller and a third roller are disposed at intervals below the reaction space.

[0006] Preferably, the activator further includes a guide shield facing the nonwoven fabric substrate; the ultraviolet lamp is mounted inside the guide shield.

[0007] Preferably, the present invention further includes a first rolling machine disposed downstream of the first reactor; the first rolling machine includes a second housing, and an upper roller and a lower roller installed inside the second housing, a liquid collecting hopper is disposed on the lower side of the second housing, and a second drain outlet is disposed at the lower end of the liquid collecting hopper.

[0008] Preferably, the second inlet of the second housing is connected to the first outlet of the first reactor; the second outlet of the second housing is connected to downstream equipment.

[0009] The first drain port is provided on the lower side of the first housing;

[0010] The first drain port and the second drain port are each equipped with a valve.

[0011] The second drain outlet is connected to the return outlet on one side of the first tank. The height of the lower end face of the collecting hopper is greater than the height of the return outlet and also greater than the liquid level in the reaction space; or

[0012] The second drain outlet is connected to the waste liquid collector.

[0013] Preferably, the upper end of the first housing is provided with a liquid inlet, and the liquid inlet is provided with a removable cover;

[0014] The upper end of the first housing is provided with a balancing port, and a filter is provided on the balancing port;

[0015] The first chamber is equipped with a stirring mechanism.

[0016] Preferably, the second housing is provided with a mounting groove, and guide members are provided on both sides of the mounting groove. The mounting plate is detachably mounted on the guide members by bolts; one side of the upper roller is mounted on the mounting plate by a bearing.

[0017] A support frame is installed on the lower side of the second housing.

[0018] Preferably, a washer, a second rolling mill, a dryer, and an edge-cutting and winding machine are sequentially arranged downstream of the first rolling mill.

[0019] Preferably, a needle punching machine is provided upstream of the activator or the first reactor.

[0020] Preferably, a door is provided on the side wall of the first housing, the door is hinged to the side wall of the first housing, and a lock is provided on the door; the output end of the drive mechanism is connected to any one of the following rollers: the first roller, the second roller, the third roller, and the fourth roller.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: the non-woven fabric substrate is activated under the ultraviolet light of the activator; the activated non-woven fabric substrate is continuously rotated in the first reactor by the first roller, the second roller, the third roller and the fourth roller, and reacts with the modifying liquid in the first reactor during the operation, thereby improving the barrier and air permeability of the non-woven fabric; continuous modification of the non-woven fabric can be achieved. Attached Figure Description

[0022] Figure 1 This is a logic block diagram of the preparation device for the high-barrier breathable nonwoven fabric of this utility model;

[0023] Figure 2This is a schematic diagram of the structure of the preparation device for high-barrier and breathable nonwoven fabric;

[0024] Figure 3 This is a cross-sectional view of the first reactor and the first rolling mill;

[0025] Figure 4 This is a schematic diagram of the distribution of the second drainage outlet.

[0026] Figure 5 This is a schematic diagram of the structure of the first reactor and the first rolling mill.

[0027] The diagram shows: 1. Needle piercing machine; 15. Activator; 16. Guide shroud; 17. Ultraviolet lamp.

[0028] 2. First reactor; 21. First housing; 22. First inlet; 23. First roller; 24. Second roller; 25. Third roller; 26. Fourth roller; 27. First outlet; 28. Door; 29. ​​Lock;

[0029] 3. Cover; 31. Balance port; 32. Return port; 33. First drain port; 34. Inlet port; 35. Valve; 36. Drive mechanism; 38. Stirring mechanism;

[0030] 4. First rolling mill; 41. Second housing; 42. Second feed inlet; 43. Lower roller; 44. Upper roller; 45. Second output outlet; 46. Mounting groove; 47. Guide component; 48. Mounting plate; 49. Bearing; 51. Bracket; 52. Second drain outlet; 53. Liquid collection hopper;

[0031] 5. Washer; 6. Second rolling machine; 7. Dryer; 8. Edge trimming and winding machine; 9. Non-woven fabric substrate; 91. High-barrier breathable non-woven fabric. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings:

[0034] Example 1 provides an apparatus for preparing high-barrier, breathable nonwoven fabric, such as... Figures 1-5As shown, it includes a first reactor 2 and an activator 15; the activator 15 is disposed inside the first reactor 2 or upstream of the first reactor 2; the activator 15 includes an ultraviolet lamp 17; the first reactor 2 includes a first housing 21, the first housing 21 is provided with a reaction space, the opposite side walls of the first housing 21 are respectively provided with a first inlet 22 and a first outlet 27, a first roller 23 and a fourth roller 26 are respectively disposed inside the first inlet 22 and the first outlet 27, and a second roller 24 and a third roller 25 are spaced apart and disposed on the lower side of the reaction space.

[0035] The nonwoven fabric substrate 9 is activated under the ultraviolet lamp 17 of the activator 15; the activated nonwoven fabric substrate 9 is continuously rotated in the first reactor 2 by the first roller 23, the second roller 24, the third roller 25 and the fourth roller 26. During the rotation, it reacts with the modification liquid in the first reactor 2 to improve the barrier and air permeability of the nonwoven fabric; thus, the continuous modification of the nonwoven fabric can be achieved.

[0036] In a specific embodiment, the main raw material of the nonwoven fabric substrate 9 is polypropylene. When ultraviolet light irradiates the nonwoven fabric, the tert-butyl groups on the polypropylene form free radicals. The reaction solution contains fluorinated acrylates, (meth)acrylates, and diacrylates. After passing through the first reactor 2, a copolymer is formed on the nonwoven fabric substrate to generate a high-barrier, breathable nonwoven fabric 91. However, the composition of the nonwoven fabric substrate and the reaction solution is not limited to these. This invention provides a preparation basis for the above reaction and improves the preparation efficiency.

[0037] Figure 4 The diagram shows a guide cover 16 facing the nonwoven fabric substrate; the ultraviolet lamp 17 is installed inside the guide cover 16. This prevents ultraviolet radiation from radiating outwards, thus improving the efficiency of directional activation. A reflective layer may also be provided on the inner side of the guide cover. In a specific embodiment, the ultraviolet irradiation dose is 700–900 kJ / cm². 2 .

[0038] Figure 1 and Figure 2 Example 2 provides a first rolling mill 4 located downstream of the first reactor 2; the first rolling mill 4 includes a second housing 41, and an upper roller 44 and a lower roller 43 installed inside the second housing 41. A liquid collecting hopper 53 is provided on the lower side of the second housing 41, and a second drain outlet 52 is provided at the lower end of the liquid collecting hopper 53.

[0039] The upper roller 44 and the lower roller 43 work together to remove the residual reaction liquid from the nonwoven fabric substrate, and then discharge or recycle it through the second drain port 52.

[0040] More specifically, the second inlet 42 of the second housing 41 is connected to the first outlet 27 of the first reactor 2; the second outlet 45 of the second housing 41 is connected to downstream equipment. A first drain outlet 33 is provided on the lower side of the first housing 21 for discharging waste liquid. Figure 5 The first drain port 33 and the second drain port 52 are each equipped with a valve 35. The second drain port 52 is connected to the return port 32 on one side of the first tank 21. The height of the lower end of the collecting hopper 53 is greater than the height of the return port 32 and greater than the liquid level in the reaction space, so that the reaction liquid collected by the first pump can be returned to the first reactor 2. Alternatively, the second drain port 52 can be connected to a waste liquid collector to discharge the collected reaction liquid.

[0041] like Figure 3 Example 3 provides a first tank 21 that can be filled with liquid: the upper end of the first tank 21 is provided with a liquid inlet 34, and the liquid inlet 34 is provided with a removable cover 3; the upper end of the first tank 21 is provided with a balance port 31, and the balance port 31 is provided with a filter to maintain the air pressure balance inside the first tank 21; the first tank 21 is provided with a stirring mechanism 38, which plays the role of stirring the reaction liquid and maintaining the reaction efficiency.

[0042] The second housing 41 is provided with a mounting groove 46, and guide members 47 are respectively provided on both sides of the mounting groove 46. The mounting plate 48 is detachably mounted on the guide members 47 by bolts. One side of the upper roller 44 is mounted on the mounting plate 48 by a bearing 49, which facilitates the adjustment of the distance and pressure between the upper roller 44 and the lower roller 43. A bracket 51 is provided on the lower side of the second housing 41 to maintain the height of the second housing 41.

[0043] like Figure 1 Example 4 provides a complete preparation apparatus. Downstream of the first punching machine 4, a cleaner 5, a second punching machine 6, a dryer 7, and an edge-trimming and winding machine 8 are sequentially arranged. Upstream of the activator 15 or the first reactor 2, a needle punching machine 1 is arranged. The needle punching machine 1, the dryer 7, and the edge-trimming and winding machine 8 are existing technologies. The cleaner 5 has the same structure as the first reactor 2, but without an activator. It is used to hold a cleaning solution, such as water, ethanol, or propanol, for cleaning the nonwoven fabric substrate after the reaction. The second punching machine 6 has the same structure as the first punching machine 4, and will not be described further in this invention.

[0044] A door 28 is provided on the side wall of the first housing 21. The door 28 is hinged to the side wall of the first housing 21 and is equipped with a lock 29 for maintaining the first housing 21. The output end of the drive mechanism 36 is connected to any of the following rollers: first roller 23, second roller 24, third roller 25, fourth roller 26, and upper roller 43 and lower roller 44. For example, a drive motor, synchronous belt, or transmission belt can be used to drive the rotation of each roller. Some rollers are active rollers and are equipped with corresponding drive mechanisms 36, while others are driven rollers, which can be set according to actual driving needs. The roller driving method is prior art and will not be described in detail in this utility model.

[0045] It should be noted that the driving speed is related to the soaking time. In one specific embodiment, the distance between the second and third rollers is 1.5-2.5 meters, preferably 2 meters, and the transmission speed of the nonwoven fabric is 0.05-0.5 meters per second, preferably 0.07 meters per second. However, this is not the limitation. The transmission speed and discharge speed, or the distance between the second and third rollers, can be adjusted according to the actual soaking time.

[0046] This invention utilizes an activator to pre-activate the nonwoven fabric substrate; then, through the cooperation of a first reactor and a first rolling machine, a one-dip-one-roll operation is achieved to modify the nonwoven fabric, while simultaneously refluxing or discharging the reaction solution. Similarly, through the cooperation of a second reactor and a second rolling machine, a one-clean-one-roll operation is achieved, enabling continuous production of high-barrier, breathable nonwoven fabric 91.

[0047] Figure 4 The diagram shows the activator 15 installed inside the first reactor 2, but it is not limited to this. The activator 15 can also be installed upstream or at the output end of the first reactor 2 as needed.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An apparatus for preparing high-barrier, breathable nonwoven fabric, characterized in that, Includes a first reactor (2) and an activator (15); The activator (15) is disposed inside the first reactor (2) or upstream of the first reactor (2); The activator (15) includes an ultraviolet lamp (17); The first reactor (2) includes a first housing (21), a reaction space is provided inside the first housing (21), a first inlet (22) and a first outlet (27) are respectively provided on opposite side walls of the first housing (21), a first roller (23) and a fourth roller (26) are respectively provided inside the first inlet (22) and the first outlet (27), and a second roller (24) and a third roller (25) are spaced apart and provided on the lower side of the reaction space.

2. The preparation device according to claim 1, characterized in that The activator (15) also includes a guide cover (16) facing the nonwoven fabric substrate; the ultraviolet lamp (17) is installed inside the guide cover (16).

3. The preparation device according to claim 1, characterized in that It also includes a first rolling mill (4) located downstream of the first reactor (2); the first rolling mill (4) includes a second housing (41), and an upper roller (44) and a lower roller (43) installed inside the second housing (41), and a liquid collecting hopper (53) is provided on the lower side of the second housing (41), and a second drain outlet (52) is provided at the lower end of the liquid collecting hopper (53).

4. The preparation device according to claim 3, characterized in that The second inlet (42) of the second housing (41) is connected to the first outlet (27) of the first reactor (2); the second outlet (45) of the second housing (41) is connected to the downstream equipment. The first box (21) is provided with a first drain port (33) on its lower side; The first drain port (33) and the second drain port (52) are respectively equipped with valves (35). The second drain port (52) is connected to the return port (32) on one side of the first housing (21). The height of the lower end face of the collecting hopper (53) is greater than the height of the return port (32) and greater than the liquid level in the reaction space; or The second drain port (52) is connected to the waste liquid collector.

5. The preparation apparatus according to claim 3, characterized in that, The upper end of the first box (21) is provided with a liquid inlet (34), and the liquid inlet (34) is provided with a removable cover (3); The upper end of the first housing (21) is provided with a balance port (31), and a filter is provided on the balance port (31); The first box (21) is equipped with a stirring mechanism (38).

6. The preparation device according to claim 3, characterized in that The second housing (41) is provided with a mounting groove (46), and guide members (47) are provided on both sides of the mounting groove (46). The mounting plate (48) is detachably mounted on the guide member (47) by bolts; one side of the upper roller (44) is mounted on the mounting plate (48) by a bearing (49). A bracket (51) is provided on the lower side of the second housing (41).

7. The preparation device according to claim 3, characterized in that Downstream of the first rolling mill (4) are a washer (5), a second rolling mill (6), a dryer (7) and a trimming and winding machine (8).

8. The preparation device according to claim 7, characterized in that A needle punch (1) is provided upstream of the activator (15) or the first reactor (2).

9. The preparation device of claim 1, wherein, A door (28) is provided on the side wall of the first box (21), the door (28) is hinged to the side wall of the first box (21), and a lock (29) is provided on the door (28); The output end of the drive mechanism (36) is connected to any of the following rollers: First roller (23), second roller (24), third roller (25) and fourth roller (26).

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