A composite water spunlace device

Abstract

The utility model discloses a composite spunlace device, belonging to the technical field of nonwoven fabrics, comprising a spunlace roller, the spunlace roller being a hollow cylindrical structure, a spunlace net with a fine open hole structure being arranged on the surface, guide rollers being provided on both sides, a first spunlace component being arranged on the top of the spunlace roller, a second spunlace component being arranged on the side of the spunlace roller, the first spunlace structure spunlaces the composite nonwoven fabric from the outside to the inside, and the second spunlace component spunlaces the composite nonwoven fabric from the outside to the inside through the spunlace net.

Description

Technical Field

[0001] The utility model belongs to the field of non-woven fabrics, and in particular relates to a composite spunlace device. Background Art

[0002] Composite nonwoven fabrics have a variety of application scenarios, such as diaper cores and various sanitary products. The role of the composite nonwoven fabric coating on the core is increasingly valued. The ideal coating layer needs to have good functions of guiding and diffusing urine and preventing urine reverse osmosis, while also requiring good air permeability. The most commonly used solution is to achieve a liquid absorption gradient in the thickness direction of the product, with the ability to conduct water in a unidirectional manner. This gradient can be achieved through coating finishing or multi-layer composite methods.

[0003] Patent CN202110644124.3 silicone water repellent, diaper surface hydrophobic spray treatment process and diapers, applies silicone water repellent to diapers, so that the finished diapers have the function of unidirectional moisture conduction, and have lower slip and back permeability, thereby achieving the effect of fast urine transmission and no back osmosis, but it uses chemical fibers and chemical finishing agents, the biosafety is not good enough, and it is not conducive to sustainable development.

[0004] Patent CN201420787880.7 discloses a spunlace nonwoven material with a one-way water-conducting function, and its preparation method and application. Hydrophilic fibers and hydrophobic fibers are selected and combed into webs respectively. The two layers of fiber webs are laid and composited and then spunlace is reinforced to obtain a spunlace nonwoven material with a one-way water-conducting function that can be used as a diaper covering layer. This patent does not require finishing agents, which solves the problem of biological safety caused by the use of finishing agents in the existing diaper covering layer. However, this patent cannot form a gradient change from a hydrophobic layer to a hydrophilic layer, and the hydrophilic and hydrophobic properties suddenly change, which affects the one-way water-conducting effect. In addition, the hydrophobic layer processed by spunlace is thicker, and there are disadvantages such as a relatively large reverse osmosis amount and insufficient dryness and comfort.

[0005] Patent CN202310336969.5 discloses a spunlace nonwoven material with unidirectional moisture conduction function and a preparation method thereof. The hydrophobic layer and the hydrophilic layer are overlapped and spunlace-compounded to obtain a unidirectional moisture conduction spunlace nonwoven fabric, and a liquid absorption gradient is achieved to increase the liquid penetration rate. This method also has the problem of lack of transition between the hydrophobic layer and the hydrophilic layer, lack of gradual gradient change, and resulting in a sudden change in wettability.

[0006] The current diaper core coating with one-way water-conducting function has the following problems: the chemical coating method uses finishing agents, resulting in poor biological safety; the multi-layer composite method has no transition between the hydrophobic layer and the hydrophilic layer, the wettability suddenly changes, and a good gradient change cannot be formed, and the hydroentanglement reinforcement makes the hydrophobic layer thicker, and the one-way water-conducting effect needs to be improved. Summary of the invention

[0007] The utility model aims to provide a composite spunlace device, which improves the unidirectional water-conducting ability and the structural strength of the device by performing high-strength composite operation on a hydrophilic fiber web and a hydrophobic melt-blown layer.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows:

[0009] A composite spunlace device comprises a spunlace roller, which is a hollow cylindrical structure, a spunlace net with a fine open hole structure is arranged on the surface, and guide rollers are provided on both sides of the spunlace roller. A first spunlace component is arranged on the top of the spunlace roller, and a second spunlace component is arranged on the side of the spunlace roller. The first spunlace component performs a spunlace operation on a composite non-woven fabric from the outside to the inside, and the second spunlace component performs a spunlace operation on the composite non-woven fabric from the outside to the inside through the spunlace net.

[0010] Furthermore, the guide roller conveys the nonwoven fabric in an Ω-shaped structure at the entanglement roller.

[0011] Furthermore, the first entanglement component has a plurality of entanglement nozzles, and a water guide component is arranged inside the corresponding entanglement roller.

[0012] Furthermore, the second spunlace component has a plurality of parallel spunlace nozzles, the spunlace nozzles are in correspondence with the openings of the spunlace net, and a water absorption roller component is arranged outside the corresponding spunlace roller.

[0013] Furthermore, the water absorption roller component includes a water absorption guide roller, a squeezing roller is arranged below the water absorption guide roller, a second water guide groove is arranged below the squeezing roller, the second water guide groove is connected to a second water outlet pipe, and the outside of the water absorption guide roller has a thicker sponge-like flexible water absorption ring structure. The water absorption guide roller is in close contact with the water puncture roller, and the non-woven fabric there is in a clamping and conveying state.

[0014] Furthermore, the first water-jetting component adopts a three-way main water-jetting structure.

[0015] Furthermore, the mesh number of the spunlace mesh is preferably 150-160 meshes.

[0016] Compared with the existing technology, this solution has the following advantages:

[0017] The present invention provides a high-strength composite non-woven fabric, which is obtained by compounding a hydrophilic fiber web with a hydrophobic melt-blown layer in a spunlace device, wherein the hydrophilic fiber web is made of a mixed comb of viscose fibers of different finenesses into a web, and after the mixed viscose fibers are combed, a plurality of fiber head ends are exposed in the fiber web, and the fiber head ends are first inserted into the hydrophobic melt-blown layer, and a plurality of interlaced fiber clusters are constructed, and at the same time, through the special front and back spunlace process of the present invention, the fiber head ends are provided with a hook-back structure, and the hook-back structure interweaves and hooks a part of the hydrophobic melt-blown layer, so that the spunlace composite of the two layers not only simply fits the two layers, but also interweaves the two layers through the fiber head ends and the interlaced fiber clusters to achieve a tightly integrated fusion structure of the two layers, so that on the one hand, the structural strength of the present non-woven fabric can be improved, and at the same time, when used in real time, it can cope with the situation of water absorption and expansion of the inner core, and prevent various pulling or tearing situations, thereby greatly improving its working stability;

[0018] The present invention provides a composite spunlace device, which is a key component for producing a high-strength composite non-woven fabric. The key is to have a double spunlace component for implementation, wherein the first spunlace component performs a spunlace operation from the outside to the inside, and guides the fiber head end of the hydrophilic fiber web to be inserted into the hydrophobic melt-blown layer, while the second spunlace component performs a spunlace operation from the inside to the outside, and performs an interlaced hook-wrap fusion operation on the fiber head end inserted into the hydrophobic melt-blown layer and the inserted fiber cluster, thereby achieving a high-strength composite non-woven fabric;

[0019] In the composite spunlace device, a single spunlace roller is used, and the non-woven fabric is transported in an Ω-shaped structure, and the first spunlace component and the second spunlace component are constructed. At the same time, the structures of the water guide component and the water absorption roller component are arranged separately, so that the structure is simple, the process flow is short, and the structure is stable and strong during the spunlace operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the finished high-strength composite non-woven fabric of the preferred embodiment.

[0021] Figure 2 It is a schematic diagram of the structure of the composite hydroentanglement device.

[0022] Figure 3 This is a schematic diagram of the side structure of the composite water spunlace device.

[0023] Figure 4 It is a schematic diagram of the structure of the water spicating roller.

[0024] Figure 5 Schematic diagram of the structure of the hydrophilic fiber web before compounding.

[0025] Figure 6 Schematic diagram of the structure of the hydrophobic meltblown layer before compounding.

[0026] Figure 7It is a schematic diagram of the composite structure after passing through the first spunlace component.

[0027] Figure 8 It is a schematic diagram of the composite structure after passing through the second spunlace component. DETAILED DESCRIPTION

[0028] As a typical non-woven fabric production process, especially composite spunlace non-woven fabric, its production process includes:

[0029] 1. Fiber material selection: The first step in making spunlace nonwovens is to select the fiber material. Commonly used materials include fibers such as cellulose, polyester, nylon and viscose. These fiber materials may be natural, synthetic or mixed;

[0030] 2. Mixing and degumming: The selected fiber materials are mixed together, usually with water;

[0031] 3. Debonding process: The material mixture enters a device where they are subjected to high-pressure water flow or chemical treatment to disperse and debond the fibers. This step helps the fibers to bond to each other to form a nonwoven structure;

[0032] 4. Wet forming: After debonding, the fiber mixture is transported to the forming equipment, usually a non-woven fabric production line. Here, the mixture is evenly distributed on the conveyor belt to form the initial structure of the non-woven fabric;

[0033] 5. Spunlace process: The formal spunlace process begins. This is the key step in making spunlace nonwovens. At this stage, the nonwoven fabric undergoes a series of high-pressure water jets to interweave and bond the fibers. This process creates a stable structure and thickness for the nonwoven fabric;

[0034] 6. Pre-pressing and drying: After spunlacing, the nonwoven fabric passes through a pre-pressing device and then a drying device to remove excess moisture;

[0035] 7. Finishing and winding: The nonwoven fabric passes through the finishing equipment to remove impurities and irregular edges, and then is wound into rolls, ready for cutting and packaging;

[0036] 8. Cutting and packaging: Finally, the spunlace nonwoven fabric is cut into the required size and shape, and then packaged into rolls to form the finished product.

[0037] refer to Figure 1The present invention provides a high-strength composite nonwoven fabric, comprising a hydrophilic fiber web 11 and a hydrophobic meltblown layer 12, which are composited by a spunlace process. The hydrophilic fiber web 11 is a web made of a mixture of viscose fibers of different finenesses, and the mixed viscose fibers are combed to expose a plurality of fiber head ends 13 in the fiber web after combing. The fiber head ends 13 are inserted into the hydrophobic meltblown layer 12 to form a plurality of interlaced fiber clusters. In some embodiments, the fiber head ends 13 have a hook-back structure, and the hook-back structure hooks and fuses part of the hydrophobic meltblown interweaving. At the same time, the hydrophobic meltblown layer 12 has a fluffy layer structure, and the fiber head ends 13 are mainly inserted into the fluffy layer structure. The hydrophobic meltblown layer 13 has a gradient change from fluffy to dense, and the bottom fiber layer is the densest structure.

[0038] This solution does not require the use of finishing agents in the chemical coating method, which will not lead to poor biological safety. At the same time, a multi-layer composite method is adopted to provide a good transition structure between the hydrophobic layer and the hydrophilic layer, forming a good gradient change. The hydroentanglement reinforcement makes the hydrophobic layer structure effective, the composite is stable and reliable, and has an excellent unidirectional water guide effect.

[0039] refer to Figures 2 to 8 A composite spunlace device includes a spunlace roller 2. The spunlace roller 2 is a hollow cylindrical structure, and its two ends are connected to the frame through annular bearings to achieve synchronous rotation with the non-woven fabric conveyor. If necessary, structures such as ring gears and motors can be arranged at its two ends to achieve synchronous rotation with the non-woven fabric tree hole.

[0040] The surface of the spunlace roller 2 is arranged with a spunlace net 21 with a fine open hole structure, and the mesh number of the spunlace net is preferably 150-160 meshes. A plurality of guide rollers 22 are arranged on the left and right sides of the spunlace net 2. The guide rollers 22 convey the non-woven fabric in an Ω-shaped structure. Specifically, on the right side of the spunlace roller 2, the guide rollers 22 are used to input the hydrophilic web 11 and the hydrophobic meltblown layer 12 respectively, and the two are bonded at the spunlace roller 2, and the hydrophilic web 11 is arranged on the inner side of the hydrophobic meltblown layer 12, and the finest structure of the hydrophilic web 11 is at the innermost position.

[0041] A first spunlace component 31 is arranged on the top of the spunlace roller 2. The first spunlace component 31 is composed of a collecting cavity with a water inlet channel inside and a water needle plate at the bottom. High-pressure water passes through a water inlet pipe 32 on one side of the water spray cavity, is filtered by a safety filter, and then enters the lower water cavity from the jet water distribution plate, and is ejected toward the fabric through the small holes on the bottom water needle plate.

[0042] In actual operation, the first spunlace component 31 generates a large number of fine water jets that are injected into the hydrophilic fiber web 11. The fiber head ends 13 inside the hydrophilic fiber web 11 are inserted into the hydrophobic meltblown layer 12 under the action of the water flow, thereby realizing the precise composite operation of the two. A water-guiding component is arranged inside the spunlace roller 2 corresponding to the first spunlace component 31. The water-guiding component includes a water-guiding groove 33 and a water outlet pipe 34. A water-absorbing layer similar to a sponge is provided on the inner wall of the water-guiding groove 33 to prevent water splashing. Therefore, the water accumulation inside the spunlace roller 2 can be realized through the water-guiding component, thereby making the related spunlace operation more stable.

[0043] A second spunlacing component 41 is provided on the side of the spunlacing roller 2. The second spunlacing component 41 has a plurality of parallel spunlacing nozzles. The spunlacing nozzles are arranged in coordination with the meshes of the spunlacing net 21 and generate a plurality of straight fine water jets for penetrating the meshes.

[0044] After the nonwoven fabric passes through the first spunlace component 31, it is transported to the corresponding position of the second spunlace component 41. At the second spunlace component 41, fine water columns are sprayed from the inside of the spunlace 21 to the outside, so that the fine water columns pass through the hydrophobic meltblown layer 12 and the fiber head ends 13 that have been laid into the hydrophobic meltblown layer 12 are reversed to construct a hook-back structure inside the hydrophobic meltblown layer 12, thereby realizing an interwoven hook-wrapped fusion structure of the two.

[0045] A water absorption roller component is arranged outside the spunlace roller 2 corresponding to the second spunlace component 41, and the water absorption guide roller component includes a water absorption guide roller 42, a squeezing roller 43 arranged below the water absorption guide roller 42, a second water guide groove 44 is arranged below the squeezing roller 43, and the second water guide groove 44 is connected to a second water outlet pipe 45. The outside of the water absorption guide roller 42 has a thicker flexible water absorption ring structure similar to a sponge. The water absorption guide roller 42 is in close contact with the spunlace roller 2, and the non-woven fabric there is in a clamping and conveying state. When the second spunlace component 41 passes through the spunlace roller 2 to perform a spunlace operation on the reverse side of the non-woven fabric, the water absorption guide roller 42 clamps the fabric on the outside of the non-woven fabric to prevent the water from penetrating and damaging the non-woven fabric. The water accumulated in the water absorption guide roller 42 is properly discharged when it rotates to the squeezing roller 43, so as to realize the continuous operation of the water absorption guide roller 42.

[0046] This scheme provides a method for preparing a high-strength composite non-woven fabric, comprising:

[0047] Viscose fibers of different fineness are mixed and opened, fed into a carding machine for carding, and then made into a hydrophilic viscose fiber web;

[0048] The polypropylene particles are heated and melted, and the melt is extruded from the spinneret holes of the die head to form a melt stream, and the melt stream is stretched and cooled to form fibers, which are collected on a web-forming curtain to form a hydrophobic melt-blown fiber web. When preparing the melt-blown fibers, the upper layer of fibers is sucked by a negative pressure suction device, so that the melt-blown fibers form a hydrophobic melt-blown fiber web on the web-forming curtain with a gradient change from fluffy to compact from top to bottom;

[0049] Pre-wetting and hydroentangling the viscose web;

[0050] The wet spunlaced viscose fibers and the hydrophobic meltblown fiber web are overlapped at the front end of the spunlaced roller, and the hydrophobic meltblown fiber web is arranged on the inner side of the viscose fibers;

[0051] At the spunlace roller 2, the laminated composite nonwoven fabric passes through the first spunlace component 31 and the second spunlace component 41 in sequence. Under the operation of the first spunlace component 31, the viscose web 11 is connected with the fluffy layer of the hydrophobic meltblown web 12. Under the operation of the second spunlace component 41, part of the fiber head ends 12 are formed into a hook-shaped structure. The first spunlace component 31 uses a high-mesh spunlace net to reduce the water spray hole and the spunlace pressure through three main spunlaces, and the mesh number of the spunlace net 21 is preferably 150-160 meshes.

[0052] After post-processing and drying, the product is rolled to produce a high-strength composite non-woven fabric.

[0053] In summary, the scheme is a high-strength composite non-woven fabric, which is composited with a hydrophilic fiber web and a hydrophobic melt-blown layer by a spunlace process, wherein the hydrophilic fiber web is made of a mixed combed web of viscose fibers of different finenesses, and the mixed viscose fibers are combed to expose a plurality of fiber head ends in the fiber web, and the fiber head ends are first inserted into the hydrophobic melt-blown layer, and a plurality of interlaced fiber clusters are constructed, and at the same time, the fiber head ends are provided with a hook-back structure by a special front and back spunlace process of the scheme, and the hook-back structure interweaves and hooks a part of the hydrophobic melt-blown layer, so that the spunlace composite of the two layers not only simply fits the two layers, but also interweaves the two layers through the fiber head ends and the interlaced fiber clusters to realize a tightly integrated fusion structure of the two layers, so that on the one hand, the structural strength of the non-woven fabric can be improved, and at the same time, when used in real time, it can cope with the situation that the inner core absorbs water and expands, and various pulling or tearing situations can be prevented, thereby greatly improving its working stability;

[0054] The present invention provides a composite spunlace device, which is a key component for producing a high-strength composite non-woven fabric. The key is to have a double spunlace component for implementation, wherein the first spunlace component performs a spunlace operation from the outside to the inside, and guides the fiber head end of the hydrophilic fiber web to be inserted into the hydrophobic melt-blown layer, while the second spunlace component performs a spunlace operation from the inside to the outside, and performs an interlaced hook-wrap fusion operation on the fiber head end inserted into the hydrophobic melt-blown layer and the inserted fiber cluster, thereby achieving a high-strength composite non-woven fabric;

[0055] In the composite spunlace device, a single spunlace roller is used, and the nonwoven fabric is conveyed in an Ω-shaped structure, and the first spunlace component and the second spunlace component are constructed, and the water guide component and the water absorption roller component are arranged respectively, so that the structure is simple, the process flow is short, and the structure is stable and strong in the spunlace operation;

[0056] The present invention provides a method for preparing a high-strength composite non-woven fabric. By constructing a structure of a viscose fiber web and a hydrophobic meltblown fiber web, the basic conditions and structure for the spunlace operation are ensured, and a high-strength and unidirectional water-conducting non-woven fabric structure is constructed by performing composite spunlace by a first spunlace component and a second spunlace component. The method has the characteristics of reliable implementation and a short process.

Claims

1. A composite spunlace device, characterized in that: It includes a spunlace roller, which is a hollow cylindrical structure with a spunlace net with a fine open hole structure arranged on the surface, and guide rollers are provided on both sides of the spunlace roller. A first spunlace component is arranged on the top of the spunlace roller, and a second spunlace component is arranged on the side of the spunlace roller. The first spunlace component spunlaces the composite non-woven fabric from the outside to the inside, and the second spunlace component spunlaces the composite non-woven fabric from the outside to the inside through the spunlace net.

2. A composite water spunlace device according to claim 1, characterized in that: The guide roller conveys the nonwoven fabric in an Ω-shaped structure at the water entanglement roller.

3. A composite water spunlace device according to claim 1, characterized in that: The first entanglement component has a plurality of entanglement nozzles, and a water guide component is arranged inside the corresponding entanglement roller.

4. A composite hydroentanglement device according to claim 1, characterized in that: The second spunlace component has a plurality of parallel spunlace nozzles, which correspond to the openings of the spunlace net. A water absorption roller component is arranged outside the corresponding spunlace roller.

5. A composite hydroentanglement device according to claim 4, characterized in that: The water absorption roller component includes a water absorption guide roller, a squeezing roller is arranged below the water absorption guide roller, a second water guide groove is arranged below the squeezing roller, the second water guide groove is connected to a second water outlet pipe, and a sponge-like flexible water absorption ring structure is provided on the outside of the water absorption guide roller. The water absorption guide roller is in close contact with the water staking roller, and the non-woven fabric is in a clamping and conveying state.

6. A composite water spunlace device according to claim 1, characterized in that: The first water entanglement component adopts a three-way main water entanglement structure.

7. The composite water spunlace device according to claim 1, characterized in that: The mesh number of the spunlace mesh is 150-160 meshes.

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