Device for forming non-woven fabric that can be dispersed

Abstract

The invention provides a device for forming a non-woven fabric capable of being dispersed. The device comprises a supporting and conveying unit; a first curing unit; the second curing unit comprises a front spunlace assembly with a first roller and a back spunlace assembly with a second roller; the second curing unit further comprises a transfer assembly, the transfer assembly is used for enabling the wet web to be optionally conveyed in the downstream direction without passing through the second reinforcing unit or be reinforced by the front spunlace assembly or be reinforced by the front spunlace assembly and the back spunlace assembly, and the transfer assembly comprises a first transfer belt. The first transfer belt comprises a wrapping section, a first adjusting section and a second adjusting section, the wrapping section wraps the first roller, the first adjusting section movably abuts against or is separated from the supporting belt, and the second adjusting section movably abuts against or is separated from the second roller; through the arrangement, three different operation modes are realized to produce diversified products, and meanwhile, products with lower basis weight can be produced through the arrangement.

Description

Technical Field

[0001] The present invention relates to an apparatus for forming a flushable nonwoven fabric. Background Art

[0002] In recent years, with the rapid development of the economy, people's pursuit of quality of life has gradually increased, and non-woven products (such as facial masks, face towels, makeup remover towels, wet toilet paper, etc.) have become an important role in daily life. Non-woven fabrics, as a commonly used material for non-woven products on the market, have the advantages of a wide source of raw materials and a soft and fluffy feel. With the increasing awareness of environmental protection, non-woven fabrics are developing in the direction of green and environmental protection, and flushable non-woven fabric materials have come into being.

[0003] Usually, these flushable nonwoven fabrics use equipment such as those shown in documents such as CN115142193A. These devices usually include a first curing mechanism and a second curing mechanism, wherein the second curing mechanism includes a hydroentanglement component for hydroentanglement from the front and back sides, and the second curing mechanism is used to perform secondary reinforcement on the flushable nonwoven fabric or form a pattern on the flushable nonwoven fabric. In order to meet the needs of different flushable nonwoven fabrics, documents such as CN115142193A propose to use a transfer mechanism to allow the fiber layer to enter the second curing mechanism selectively. However, the flexibility of this equipment is still not enough to meet various needs, such as the situation where only single-sided secondary reinforcement is required to achieve a strength higher than single reinforcement, but the flushability is higher than secondary reinforcement, and the situation where only a pattern needs to be obtained on one side, etc. In addition, in the aforementioned equipment, it is necessary to use the tension of the fiber layer to enter the second reinforcement mechanism. In some cases, such as flushable nonwoven fabrics with a basis weight of 10g or less, the strength is extremely low in a wet state, making it difficult to transfer these fiber layers to the second reinforcement mechanism, causing production difficulties.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0005] To this end, the present invention provides an apparatus for forming a flushable nonwoven fabric to solve the above technical problems.

[0006] An apparatus for forming a flushable nonwoven fabric, comprising: A supporting and conveying unit, comprising a supporting belt for supporting the wet web material to move in a downstream direction; a first curing unit, for performing hydroentanglement consolidation on the wet web on the supporting belt; The second curing unit comprises a front hydroentanglement assembly having a first roller and a back hydroentanglement assembly having a second roller, and is used for performing secondary hydroentanglement on the wet web material hydroentangled by the first curing unit from the front and back sides; The second curing unit also includes a transfer component, which is used to allow the wet web to be optionally transported to the downstream direction without passing through the second reinforcement unit or to be reinforced by the front water spunlace component or by the front water spunlace component and the back water spunlace component. The transfer component includes a first transfer belt, and the first transfer belt includes a covering section, a first adjustment section and a second adjustment section, wherein the covering section is covered on the first roller, the first adjustment section can be movably connected to or separated from the supporting belt, and the second adjustment section can be movably connected to or separated from the second roller.

[0007] Among them, when the first adjusting section is separated from the supporting belt, the wet web material is not transported to the downstream direction through the second reinforcement unit; when the first adjusting section is in contact with the supporting belt and the second adjusting section is separated from the second roller, the wet web material is only subjected to secondary hydroentanglement reinforcement by the front hydroentanglement assembly; when the first adjusting section is in contact with the supporting belt and the second adjusting section is in contact with the second roller, the wet web material is subjected to secondary hydroentanglement reinforcement by the front hydroentanglement assembly and the back hydroentanglement assembly.

[0008] Among them, the first transfer belt is wound on a number of rollers, including a first adjusting roller. The first adjusting section is the part covered on the first adjusting roller. The first adjusting roller is configured to be able to move toward or away from the supporting belt.

[0009] Wherein, the first adjusting roller comprises a side wall provided with a plurality of through holes and a cavity surrounded by the side wall, and a negative pressure box is provided in the cavity for making the cavity present a negative pressure state.

[0010] Among them, there is a gap between the first roller and the second roller, and the second adjustment section is located downstream of the covering section, including a connecting end located in the gap and a swinging part located downstream of the connecting end, and the swinging part is configured to swing toward the second roller and abut against the second roller.

[0011] Among them, the plurality of rollers include a second adjusting roller, the second adjusting roller supports the second adjusting section and is configured to swing along the vertical direction, so as to make the second adjusting section swing along with it.

[0012] Wherein, the transfer assembly further includes a second transfer belt at least partially wrapped around the second roller, and the second transfer belt includes a transfer section located in the downstream direction of the second roller.

[0013] Wherein, the first transfer belt further comprises a third adjusting section, and the third adjusting section can movably contact or separate from the transfer section so as to transfer the wet web on the first transfer belt to the second transfer belt.

[0014] Wherein, the first transfer belt and the second transfer belt both run in a circular manner.

[0015] When the first adjusting section abuts against the supporting belt and the second adjusting section abuts against the second roller, the wet web is transferred from the supporting belt supported by the first transfer belt to the first roller, and from the first roller to the second roller.

[0016] Beneficial effects: The present invention provides an apparatus for forming a flushable non-woven fabric, comprising: a supporting and conveying unit; a first curing unit; a second curing unit, comprising a front hydroentanglement assembly having a first roller and a back hydroentanglement assembly having a second roller; the second curing unit also comprises a transfer assembly, the transfer assembly is used to allow the wet web to be optionally conveyed to the downstream direction without passing through the second reinforcement unit or to be reinforced by the front hydroentanglement assembly or by the front hydroentanglement assembly and the back hydroentanglement assembly, the transfer assembly comprises a first transfer belt, the first transfer belt comprises a covering section, a first adjustment section and a second adjustment section, wherein the covering section is covered on the first roller, the first adjustment section can be movably connected to or separated from the supporting belt, and the second adjustment section can be movably connected to or separated from the second roller, three different operating modes are realized by the above arrangement to produce diversified products, and at the same time, products with lower basis weight can be produced by the above arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an apparatus for forming a flushable nonwoven fabric according to an embodiment of the present invention in a first operating mode; Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle; Figure 3 for Figure 1 A schematic diagram of a device in a second operating mode; Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle; Figure 5 for Figure 1 A schematic diagram of a device in a third operating mode; Figure 6 for Figure 5 Enlarged schematic diagram at point C in the middle.

[0018] Component Description: Combing assembly 10; supporting and conveying unit 20; supporting belt 200; first supporting section 21; second supporting section 22; third supporting section 23; short fiber laying assembly 30; first curing unit 40; spunlacing nozzle group 41; second curing unit 50; gap 501; front spunlacing assembly 51; first adjusting roller 5101; second adjusting roller 5102; third adjusting roller 5103; first roller 511; negative pressure box 5104; first peripheral spunlacing nozzle 512; back spunlacing assembly 52; second roller 521; second peripheral spunlacing nozzle 522; first transfer belt 53; covering section 530; first adjusting section 531; first connecting section 5311; second adjusting section 532; second connecting section 5321; third adjusting section 533; second transfer belt 54; transfer section 541; wet web 61. DETAILED DESCRIPTION

[0019] Please refer to Figure 1-Figure 6 An embodiment of the present invention provides an apparatus for forming a flushable non-woven fabric, which is used to prepare a flushable non-woven fabric. The apparatus includes a supporting and conveying unit 20, a first curing unit 40 and a second curing unit 50. It can be understood that the apparatus also includes a forming unit for forming a wet web 61.

[0020] In this embodiment, the forming unit includes a combing component 10 and a short fiber laying component 30, wherein the combing component 10 is used to form a base layer mainly composed of long fibers, and the long fibers usually have a fiber length of 8 to 150 mm. A transfer device is usually provided downstream of the combing component 10 for transferring the base layer to the supporting and conveying unit 20.

[0021] The supporting conveying unit 20 includes a supporting belt 200 having a supporting surface. The supporting belt 200 is arranged on a plurality of rollers and can circulate. The base layer is transferred to the supporting surface and supported by the supporting surface to run in the downstream direction. In this embodiment, the downstream direction is located at Figure 1 The right side in the figure, that is, the base layer runs from left to right during operation. At the same time, the supporting surface includes a first supporting section 21, a second supporting section 22 and a third supporting section 23 from upstream to downstream.

[0022] The short fiber laying assembly 30 is disposed on the first supporting section 21 and is configured to lay short fibers on the base layer on the first supporting section 21 to form a wet web 61. The short fibers generally have a length of 1 to 15 mm, particularly 1 to 4 mm. In addition, these short fibers can generally be plant fibers, such as wood pulp fibers.

[0023] The first curing unit 40 is used to perform hydroentanglement reinforcement on the wet web 61 located on the supporting belt 200. In the present embodiment, the first curing unit 40 is arranged in the area corresponding to the second supporting section 22, and includes a plurality of hydroentanglement nozzle groups 41. These hydroentanglement nozzle groups 41 are arranged in sequence along the running direction of the wet web 61, so as to perform hydroentanglement reinforcement on the wet web 61 in sequence through the plurality of hydroentanglement nozzle groups 41.

[0024] Specifically, the spunlace nozzle group 41 includes a plurality of water needles arranged along the width direction of the wet web material 61, and the water needles are configured to spray high-pressure needle-shaped water flow to impact the wet web material 61, so that the fibers on the wet web material 61 become entangled and tangled. At the same time, the high-pressure needle-shaped water flow passing through the wet web material 61 is reflected by the cover plate and passes through the wet web material 61 again to entangle and tangle the fibers, thereby forming a reinforced wet web material 61.

[0025] In a specific embodiment, the hydroentanglement nozzle group 41 is configured in five groups, and the pressures of the high-pressure needle water streams sprayed by the five groups of hydroentanglement nozzle groups 41 increase sequentially. More specifically, the pressures of the five groups of high-pressure needle water streams are 25±5bar, 35±5bar, 45±5bar, 50±5bar, and 55±5bar respectively.

[0026] It can be understood that in order to enable the high-pressure needle-shaped water flow to perform hydroentanglement reinforcement on the wet web 61, the supporting belt 200 should be fluid-permeable, such as a mesh belt or a mesh curtain.

[0027] The second curing unit 50 includes a front spunlace component 51 and a back spunlace component 52, which are used to perform secondary spunlace reinforcement from the front and back sides of the wet web 61 that has been spunlace reinforced by the first curing unit 40. It can be understood that a predetermined pattern can also be formed on the wet web 61 through the second curing unit 50.

[0028] Among them, the front water jet component 51 includes a first roller 511 and a plurality of first peripheral water jet nozzles 512 arranged around the first roller 511 and facing the outer surface of the first roller 511, and the back water jet component 52 includes a second roller 521 and a plurality of second peripheral water jet nozzles 522 arranged around the second roller 521 and facing the outer surface of the second roller 521. During operation, the first roller 511 and the second roller 521 rotate in opposite directions, so that the first peripheral water jet nozzle 512 and the second peripheral water jet nozzle 522 respectively spray high-pressure needle-shaped water flow from the front direction and the back direction of the wet web 61, thereby performing secondary water jet reinforcement on the wet web 61 from the front and back sides.

[0029] Typically, the front hydroentanglement assembly 51 and the back hydroentanglement assembly 52 are arranged in an upper and lower manner. In the present embodiment, the front hydroentanglement assembly 51 and the back hydroentanglement assembly 52 are both arranged above the supporting and conveying unit 20, and the front hydroentanglement assembly 51 is adjacent to the supporting and conveying unit 20, while the back hydroentanglement assembly 52 is away from the supporting and conveying unit 20. Meanwhile, the second roller 521 is spaced apart from the first roller 511, and a gap 501 is included between the second roller 521 and the first roller 511.

[0030] In addition, the pressures of the high-pressure needle-shaped water streams sprayed by the first peripheral hydroentanglement nozzle 512 and the second peripheral hydroentanglement nozzle 522 are roughly the same. Of course, the pressures can be set according to actual needs, which will not be elaborated here.

[0031] The second curing unit 50 also includes a transfer component, which is used to enable the device to be optionally in one of three different operating modes, namely the first operating mode, the second operating mode and the third operating mode. Specifically, when the device is in the first operating mode, the wet web 61 will be directly transported to the downstream direction without undergoing secondary hydroentanglement reinforcement by the second reinforcement unit; when the device is in the second operating mode, the wet web 61 will only be subjected to secondary hydroentanglement reinforcement by the front hydroentanglement component 51; when the device is in the third operating mode, the wet web 61 will be subjected to secondary hydroentanglement reinforcement by both the front hydroentanglement component 51 and the back hydroentanglement component 52.

[0032] It can be understood that the direct conveyance to the downstream direction without the secondary hydroentanglement reinforcement of the second reinforcement unit means that the wet web 61 is conveyed to the downstream direction by the third supporting section 23 of the supporting belt 200 without passing through the second reinforcement unit.

[0033] The transfer assembly includes a first transfer belt 53, and the first transfer belt 53 runs in a circular motion, including a covering section 530, a first adjusting section 531 and a second adjusting section 532, wherein the covering section 530 is covered on the first roller 511, and the first adjusting section 531 can be movably abutted against or separated from the supporting belt 200, and the second adjusting section 532 can be movably abutted against or separated from the second roller 521. By abutting or separating the first adjusting section 531 with the supporting belt 200, and abutting or separating the second adjusting section 532 with the second roller 521, the device can be optionally in one of three different operating modes. Specifically, the first adjusting section 531 and the supporting belt 200 are connected to each other. When the belt 200 is separated, the device is in the first operating mode, and the wet web 61 will be directly transported downstream without undergoing secondary hydroentanglement reinforcement by the second reinforcement unit. When the first adjustment section 531 abuts against the supporting belt 200 and the second adjustment section 532 is separated from the second roller 521, the device is in the second operating mode, and the wet web 61 will be secondary hydroentangled only by the front hydroentanglement component 51. When the first adjustment section 531 abuts against the supporting belt 200 and the second adjustment section 532 abuts against the second roller 521, the device is in the third operating mode, and the wet web 61 will be secondary hydroentangled by the front hydroentanglement component 51 and the back hydroentanglement component 52.

[0034] Furthermore, the first transfer belt 53 is wound around a plurality of rollers, which include a first adjusting roller 5101, wherein the first adjusting section 531 is a portion covered on the first adjusting roller 5101, and the first adjusting roller 5101 is configured to be movable toward or away from the supporting belt 200 so that the first adjusting section 531 contacts the supporting belt 200 or separates from the supporting belt 200.

[0035] It can be understood that a first connecting section 5311 is included between the wrapping section 530 and the first adjustment section 531. When the first adjustment section 531 abuts against the supporting belt 200, the wet web 61 located on the supporting belt 200 will move to the wrapping section 530 along with the first adjustment section 531 and the first connecting section 5311, thereby being reinforced by the front water spunlace component 51.

[0036] Furthermore, the second adjustment section 532 is located downstream of the coating section 530, and includes a connecting end located in the gap 501 and a swinging portion located downstream of the connecting end, and the swinging portion is configured to swing flexibly toward the second roller 521 and abut against the second roller 521, so that the wet web 61 passing through the coating section 530 can be transferred to the second roller 521 and reinforced by the back-side spunlace assembly 52.

[0037] It can be understood that when the swinging portion swings away from the second roller 521 , the swinging portion separates from the second roller 521 , so that the wet web 61 is not transferred to the second roller 521 and continues to move downstream together with the first transfer belt 53 .

[0038] In addition, it can be understood that when the wet web 61 is transferred from the supporting belt 200 to the first roller 511, and from the first roller 511 to the second roller 521, it is supported by the first transfer belt 53. In this process, no tension is required, so that the wet web 61 with extremely weak strength can also be transferred smoothly. In a specific embodiment, the wet web 61 forming a dispersible non-woven fabric with a basis weight of 8 g / ㎡ or less can also be transferred smoothly and reinforced by secondary water spunlace.

[0039] Furthermore, the supporting roller includes a second adjusting roller 5102, which supports the second adjusting section 532 and is configured to swing in the vertical direction so that the second adjusting section 532 can swing therewith, thereby allowing the second adjusting section 532 to contact the second roller 521 or separate from the second roller 521.

[0040] Furthermore, the transfer assembly also includes a second transfer belt 54 that is at least partially wrapped around the second roller 521, and is used to transfer the wet web 61 that has been secondary hydroentangled by the back hydroentanglement assembly 52 to a downstream direction. Specifically, the second transfer belt 54 includes a transfer section 541 located downstream of the second roller 521.

[0041] Furthermore, the first transfer belt 53 also includes a third adjustment section 533, and the third adjustment section 533 can movably contact or separate from the transfer section 541, so that the wet web 61 located on the first transfer belt 53 can be transferred to the transfer section 541 on the second transfer belt 54 and transported in the downstream direction, so that in the second operating mode and the third operating mode, the wet web 61 is transported in the downstream direction through the second transfer belt 54.

[0042] It can be understood that the roller includes a third adjustment roller 5103, the third adjustment section 533 is a portion covered on the third adjustment roller 5103, and the first transfer belt 53 also includes a second connecting section 5321 located between the second adjustment section 532 and the third adjustment section 533.

[0043] It can be understood that, when in the second operating mode, the third adjusting section 533 conflicts with the transfer section 541, and the wet web 61 is transferred to the transfer section 541 via the second adjusting section 532, the second connecting section 5321 and the third adjusting section 533 and then transported to the downstream direction. In the third operating mode, the third adjusting section 533 is separated from the transfer section 541, and the wet web 61 is transferred from the coating section 530 to the second transfer belt 54, and transported to the downstream direction on the transfer section 541.

[0044] It can be understood that the second transfer belt 54 is also configured to run in a circular motion.

[0045] Furthermore, the first adjustment roller 5101 includes a side wall provided with a plurality of through holes and a cavity surrounded by the side wall, and a negative pressure box 5104 is provided in the cavity so that the cavity is in a negative pressure state, thereby facilitating the smooth transfer of the wet web 61 from the supporting belt 200 to the first transfer belt 53.

[0046] In addition, a negative pressure box 5104 (not shown) may be provided below the transfer section 541 , so that the wet web 61 located on the third adjustment section 533 can be conveniently transferred to the transfer section 541 .

[0047] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An apparatus for forming a flushable nonwoven fabric, characterized in that: include: A supporting and conveying unit, comprising a supporting belt for supporting the wet web material to move in a downstream direction; a first curing unit, for performing hydroentanglement consolidation on the wet web on the supporting belt; The second curing unit comprises a front hydroentanglement assembly having a first roller and a back hydroentanglement assembly having a second roller, and is used for performing secondary hydroentanglement on the wet web material hydroentangled by the first curing unit from the front and back sides; The second curing unit also includes a transfer component, which is used to allow the wet web to be optionally transported to the downstream direction without passing through the second reinforcement unit or to be reinforced by the front water spunlace component or by the front water spunlace component and the back water spunlace component. The transfer component includes a first transfer belt, and the first transfer belt includes a covering section, a first adjustment section and a second adjustment section, wherein the covering section is covered on the first roller, the first adjustment section can be movably connected to or separated from the supporting belt, and the second adjustment section can be movably connected to or separated from the second roller.

2. The device according to claim 1, characterized in that When the first adjusting section is separated from the supporting belt, the wet web material is transported downstream without passing through the second reinforcement unit; when the first adjusting section is in contact with the supporting belt and the second adjusting section is separated from the second roller, the wet web material is only subjected to secondary hydroentanglement reinforcement by the front hydroentanglement assembly; when the first adjusting section is in contact with the supporting belt and the second adjusting section is in contact with the second roller, the wet web material is subjected to secondary hydroentanglement reinforcement by the front hydroentanglement assembly and the back hydroentanglement assembly.

3. The device according to claim 2, characterized in that The first transfer belt is wound around a plurality of rollers, which include a first adjusting roller. The first adjusting section is a portion wrapped around the first adjusting roller. The first adjusting roller is configured to be movable toward or away from the supporting belt.

4. The device according to claim 3, characterized in that The first adjusting roller comprises a side wall provided with a plurality of through holes and a cavity surrounded by the side wall. A negative pressure box is provided in the cavity to make the cavity present a negative pressure state.

5. The device according to claim 2, characterized in that There is a gap between the first roller and the second roller. The second adjustment section is located downstream of the covering section and includes a connecting end located in the gap and a swinging portion located downstream of the connecting end. The swinging portion is configured to swing toward the second roller and abut against the second roller.

6. The device according to claim 5, characterized in that The plurality of supporting rollers include a second adjusting roller, which supports the second adjusting section and is configured to swing in a vertical direction so as to enable the second adjusting section to swing along with it.

7. The device according to claim 2, characterized in that The transfer assembly further comprises a second transfer belt at least partially wrapped around the second roller, and the second transfer belt comprises a transfer section located in the downstream direction of the second roller.

8. The device according to claim 7, characterized in that The first transfer belt further comprises a third adjusting section, and the third adjusting section can movably contact or separate from the transfer section so as to transfer the wet web on the first transfer belt to the second transfer belt.

9. The device according to claim 8, characterized in that The first transfer belt and the second transfer belt both run in a circular motion.

10. The device according to claim 2, characterized in that When the first adjusting section abuts against the supporting belt and the second adjusting section abuts against the second roller, the wet web is transferred from the supporting belt supported by the first transfer belt to the first roller, and from the first roller to the second roller.

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