Non-woven fabric spunlace device, method and production system

Abstract

The invention provides a non-woven fabric spunlace device, method and production system.The non-woven fabric spunlace device comprises a machine shell, a fixed cylinder is transversely connected in the machine shell, a movable roller is rotationally connected outside the fixed cylinder, an outer high-pressure spray pipe is arranged at the position, outside the movable roller, of the machine shell, the outer high-pressure spray pipe is communicated with a plurality of outer spunlace nozzles, and an inner high-pressure spray pipe is arranged at the position, inside the fixed cylinder, of the machine shell; the inner high-pressure spray pipe is communicated with a plurality of inner spunlace spray heads; the fixed cylinder is provided with a plurality of spunlace through holes in one-to-one correspondence with the inner spunlace nozzles, the movable roller is formed by connecting a plurality of reflection rings, a spunlace gap in one-to-one correspondence with the outer spunlace nozzles and the inner spunlace nozzles is reserved between every two reflection rings, and every two reflection rings are connected through a plurality of connecting pieces; and the shell is provided with an arc-shaped reflecting strip matched with the inner spunlace nozzle outside the movable roller. The non-woven fabric is processed in a double-sided spunlace mode, the entanglement efficiency of the whole fiber net, especially the core layer, can be effectively improved, and the longitudinal and transverse strength difference of a product is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of spunlace nonwoven fabrics, and relates to a nonwoven fabric spunlace device, method and production system. Background Art

[0002] With the development of the modern nonwoven fabric industry, nonwoven fabrics, as an important basic material, have been widely used in many fields such as hygiene, medical treatment, agriculture, packaging, etc. There are various methods for manufacturing nonwoven fabrics, including but not limited to thermal bonding, chemical bonding, needle punching, spunlace and other processes. Among them, the spunlace method has received special attention due to its unique fiber web forming method and product characteristics. Spunlace nonwoven fabrics are made by spraying high-pressure fine water jets on the fiber web, so that the fibers are entangled and fixed to form a fabric structure, which has the characteristics of soft touch, good air permeability, and moderate strength.

[0003] Specifically, spunlace technology uses high-speed flowing water to penetrate the fiber web, causing the fibers to shift and entangle with each other under the action of the water flow, thereby strengthening the fiber web. This process not only avoids the complex processes required in the production of traditional textiles, such as spinning and weaving, but also directly converts the fibers into non-woven fabrics with specific properties. Therefore, while maintaining the original characteristics of the fiber, spunlace non-woven fabrics can also adjust the product's thickness, density, strength and other parameters according to actual needs, greatly expanding its scope of application.

[0004] However, the existing spunlace nonwovens are generally produced using a single-sided spunlace process. In this process, high-pressure water flow in a single direction mainly acts on one side of the fiber web, resulting in a tighter entanglement between the fibers on that side, while the entanglement rate on the other side and the fiber web core layer is significantly insufficient, usually less than 40%. This uneven entanglement effect causes a large difference in strength in the longitudinal and transverse directions of the final product, generally exceeding 35%. Especially in the medical and other fields with high material requirements, quality problems such as delamination and chipping are prone to occur, limiting the wider application and development of spunlace nonwovens. Summary of the invention

[0005] The purpose of the present invention is to provide a non-woven fabric spunlace device, method and production system, which uses double-sided spunlace to process non-woven fabrics, which can effectively improve the entanglement efficiency of the entire fiber web, especially the core layer, and reduce the strength difference in the longitudinal and transverse directions of the product.

[0006] In order to solve the above technical problems, the present invention provides a non-woven fabric spunlace device, comprising a housing, a fixed cylinder is transversely connected inside the housing, a movable roller is rotatably connected outside the fixed cylinder, an external high-pressure nozzle is arranged outside the movable roller along its length direction, the external high-pressure nozzle is connected with a plurality of external spunlace nozzles distributed along its length direction, each external spunlace nozzle is arranged toward the axis direction of the fixed cylinder, an internal high-pressure nozzle is arranged inside the fixed cylinder along its length direction, the internal high-pressure nozzle is connected with a plurality of internal spunlace nozzles distributed along its length direction, each internal spunlace nozzle is arranged radially outward from the axis of the fixed cylinder;

[0007] The fixed cylinder is provided with a plurality of spurting holes corresponding one-to-one to the inner spurting nozzles, the movable roller is connected by a plurality of reflection rings, a spurting gap corresponding one-to-one to the outer spurting nozzles and the inner spurting nozzles is left between every two reflection rings, every two reflection rings are connected by a plurality of connecting pieces arranged toward the axial direction of the fixed cylinder, a plurality of outward reflecting grooves corresponding one-to-one to the outer spurting nozzles are provided on the outer side of the fixed cylinder, the casing is provided with an arc-shaped reflection strip cooperating with the inner spurting nozzles outside the movable roller, and a plurality of inward reflecting grooves corresponding one-to-one to the inner spurting nozzles are provided on the side of the arc-shaped reflection strip facing the movable roller.

[0008] The present invention is further configured such that support rings are provided outwardly at both ends of the fixed cylinder, rotating rings corresponding to the support rings are provided at both ends of the movable roller, and a connecting bearing is provided between each support ring and the corresponding rotating ring.

[0009] The present invention is further configured such that each two adjacent outer hydroentanglement nozzles on the outer high-pressure nozzle are staggered in left-right distribution, and each two adjacent inner hydroentanglement nozzles on the inner high-pressure nozzle are staggered in left-right distribution.

[0010] The present invention also discloses a non-woven fabric spunlace method, comprising the following steps:

[0011] S1. After the non-woven fabric is opened, it is sprayed and pre-wetted to make the moisture content of the non-woven fabric reach 28%-35%;

[0012] S2, the non-woven fabric horizontally passes around the movable roller so as to pass through the outer spunlaced nozzle and the inner spunlaced nozzle in sequence;

[0013] S3, the external spunlacing nozzle is directed toward the non-woven fabric to perform spunlacing on the outside, and the water needle passes through the non-woven fabric and the spunlacing gap and is reflected on the surface of the fixed cylinder, the pressure is 80-150 bar, and the diameter of the water needle is 0.12 mm;

[0014] S4, the inner spunlacing nozzle performs inner spunlacing toward the non-woven fabric, the spunlacing needle passes through the spunlacing through hole, the spunlacing gap and the non-woven fabric, and is reflected on the arc-shaped reflection strip, the pressure is 120-180 bar, and the diameter of the spunlacing needle is 0.12 mm;

[0015] S5. After the spunlace is completed, the nonwoven fabric is dehydrated and dried.

[0016] The present invention also discloses a non-woven fabric spunlace production system, based on a non-woven fabric spunlace device according to any one of claims 1 to 3, a pre-wetting box is arranged on one side of the housing, a spunlace inlet and a spunlace outlet are provided on one side of the housing close to the pre-wetting box, a pre-wetting inlet and a pre-wetting outlet corresponding to the spunlace outlet are respectively provided on both sides of the pre-wetting box, a plurality of pre-wetting guide rollers are rotatably connected in the pre-wetting box, a humidifying pipe is connected to the upper end of the pre-wetting box, and a plurality of exhaust holes are provided on the outer side of the lower part of the pre-wetting box;

[0017] The lower end of the housing is a water collecting tank, a water storage tank is arranged outside the housing, the bottom of the water collecting tank is connected to the upper part of the water storage tank through a water guide pipe, the upper part of the water storage tank is connected to a water supply pipe, a high-pressure water pump is arranged in the water storage tank, the outlet end of the high-pressure water pump is connected to a high-pressure water pipe, and the external high-pressure nozzle and the internal high-pressure nozzle are both connected to the high-pressure water pipe through a connecting pipe;

[0018] A negative pressure dehydration box is arranged on one side of the casing close to the pre-wetting box, and negative pressure inlets and negative pressure outlets corresponding to the water spurting outlets are respectively opened on both sides of the negative pressure dehydration box, and a plurality of dehydration guide rollers are rotatably connected in the negative pressure dehydration box, and a water collecting box connected thereto is arranged on one side of the negative pressure dehydration box, a negative pressure pump is installed at the upper end of the water collecting tank, and the inlet end of the negative pressure pump is connected to the upper end of the water collecting box, and a drainage pipe is connected between the lower end of the water collecting box and the upper part of the water storage tank, and a solenoid valve is arranged on the drainage pipe;

[0019] A drying box is arranged on the side of the negative pressure dehydration box away from the housing, and a drying inlet and a drying outlet corresponding to the negative pressure outlet are respectively opened on both sides of the drying box, a plurality of drying guide rollers are rotatably connected in the drying box, a hot air pipe is connected to the lower end of the drying box, and a dehumidification pipe is connected to the upper end of the drying box;

[0020] A vertically arranged heat exchange cylinder is arranged outside the drying box, a plurality of air inlet holes are opened on the side wall of the upper portion of the heat exchange cylinder, a hot air cylinder is arranged inside the heat exchange cylinder, an inner spiral heat exchange fin is arranged inside the hot air cylinder inside the heat exchange cylinder, a plurality of outer spiral heat exchange fins are arranged between the inner wall of the heat exchange cylinder and the outer wall of the hot air cylinder, the dehumidification pipe is connected with the upper end of the hot air cylinder, the lower end of the hot air cylinder is connected with the humidification pipe, the lower end of the hot air cylinder is connected with a drainage pipe connected with the water storage tank, a hot air blower is arranged outside the drying box, an inlet end of the hot air blower is connected with the lower portion of the heat exchange cylinder through an air inlet pipe, and an outlet end of the hot air blower is connected with the hot air pipe.

[0021] The present invention is further configured as follows: the upper end of the pre-wet box is connected to a moisture inlet chamber, the humidification pipe is connected to the moisture inlet chamber, the upper end of the pre-wet box is provided with a moisture inlet hole connected to the moisture inlet chamber, the upper end of the moisture inlet chamber is provided with an atomizer, the atomizer is connected to the humidification pipe near the pre-wet box, and the atomizer is connected to a water replenishment pipe for replenishing water.

[0022] The present invention is further configured such that the inlet end of the high-pressure water pump is connected to an impurity filter.

[0023] The present invention is further configured such that two oppositely arranged squeezing and dehydrating rollers are rotatably connected at the negative pressure inlet in the negative pressure dehydration box, a driving motor is installed on the outside of the negative pressure dehydration box, and a power output shaft of the driving motor is connected to one end of one of the squeezing and dehydrating rollers.

[0024] The present invention is further configured such that a negative pressure chamber is provided at the lower end of the negative pressure dehydration box, a negative pressure suction hole connected to the negative pressure chamber is provided at the lower end of the negative pressure dehydration box, and the lower end of the negative pressure chamber is connected to the upper part of the water collecting tank through a negative pressure pipe.

[0025] The present invention is further configured as follows: the lower end of the drying box is provided with a hot air cavity connected thereto, the hot air pipe is connected to the lower end of the hot air cavity, the lower end of the drying box is provided with a hot air hole connected to the hot air cavity, the upper end of the drying box is provided with a dehumidification cavity connected thereto, the dehumidification pipe is connected to the upper part of the dehumidification cavity, and the upper end of the drying box is provided with a dehumidification hole connected to the dehumidification cavity.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] First, the present invention innovatively uses double-sided spunlace to spunlace the non-woven fabric inside and outside. The outer spunlace forms the main entanglement layer to enhance the longitudinal strength in a directional manner, and the inner spunlace supplements the entanglement to balance the longitudinal and transverse strengths. The groove structure is used to reflect the spunlace to avoid the "water column overlap" effect caused by plane reflection, effectively enhancing the energy utilization rate and coverage uniformity of water flow rebound, which can effectively improve the entanglement efficiency of the fiber web as a whole, especially the core layer, and reduce the longitudinal and transverse strength differences of the product.

[0028] Secondly, the present invention recycles the water source in the spunlace process. The water after spunlace is directly collected in the water storage tank, and the non-woven fabric is further squeezed and dehydrated. The dehydrated water is also collected in the water storage tank. The non-woven fabric is then dried with hot air. The water from the hot air drying enters the heat exchange and then partially flows back to the water storage tank for storage. The remaining part of the moisture enters the pre-wetting box to pre-wet the non-woven fabric, so that the water in the whole system can be fully recycled. The water resource recovery rate is as high as more than 96%, which can effectively solve the problem of high water consumption in the spunlace process.

[0029] Thirdly, the present invention recycles the heat in the hydroentanglement process. After the hot air dries the non-woven fabric, it enters the hot air cylinder in the heat exchange cylinder and exchanges heat with the cold air, so that the heat of the hot and humid air is fully transferred to the cold air. After being heated by the hot air blower at low power, hot air that can be used for drying can be obtained, thereby improving the thermal efficiency of the entire system and solving the problem of high energy consumption in the hydroentanglement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a partial cross-sectional view used to show the internal structure of the pre-wetting box;

[0032] Figure 3 It is a partial cross-sectional view used to show the internal structure of the casing;

[0033] Figure 4 Used to demonstrate the connection between the fixed drum and the movable roller;

[0034] Figure 5 Used to demonstrate the inwardly reflecting grooves on the curved reflective strip;

[0035] Figure 6 It is a partial cross-sectional view for showing the impurity filter in the water storage tank;

[0036] Figure 7 It is a partial cross-sectional view used to show the internal structure of the negative pressure dehydration box;

[0037] Figure 8 It is a partial cross-sectional view used to show the connection between the bottom of the negative pressure dehydration box and the negative pressure chamber;

[0038] Fig. 9 It is a partial cross-sectional view used to show the internal structure of the drying box;

[0039] Fig.10 It is a partial cross-sectional view used to show the connection between the bottom of the drying box and the hot air chamber;

[0040] Fig.11 It is a partial cross-sectional view used to show the internal structure of the heat exchange cylinder and the hot gas cylinder.

[0041] Among them, 1. pre-wetting box; 2. pre-wetting inlet; 3. pre-wetting outlet; 4. pre-wetting guide roller; 6. exhaust hole; 7. wet inlet chamber; 8. humidification tube; 9. wet inlet hole; 10. atomizer; 11. atomization tube; 12. water supply tube; 13. casing; 14. water spurting inlet; 15. water spurting outlet; 16. fixed cylinder; 17. movable roller; 18. support ring; 19. rotating ring; 20. connecting bearing; 21. external high-pressure nozzle; 22. external water spurting nozzle; 23. internal high-pressure nozzle; 24. internal water spurting nozzle; 25. water spurting through hole; 26. water spurting gap; 27. connecting piece; 28. outward reflection groove; 29. ​​arc reflection strip; 30. inward reflection groove; 31. water collecting tank; 32. water storage tank; 33. water guide pipe; 34. water supply pipe; 35. high-pressure water pump; 36. Impurity filter; 37. High-pressure water pipe; 38. Connecting pipe; 39. Negative pressure dehydration box; 40. Negative pressure inlet; 41. Negative pressure outlet; 42. Extrusion dehydration roller; 43. Driving motor; 44. Dehydration guide roller; 45. Negative pressure chamber; 46. Negative pressure suction hole; 47. Water collecting box; 48. Negative pressure pump; 49. Drainage pipe; 50. Solenoid valve; 51. Drying box; 52. Drying inlet; 53. Drying outlet; 54. Drying guide roller; 55. Hot air chamber; 56. Hot air pipe; 57. Hot air hole; 58. Dehumidification chamber; 59. Dehumidification pipe; 60. Dehumidification hole; 61. Heat exchange cylinder; 62. Air inlet; 63. Hot air cylinder; 64. Inner spiral heat exchange fins; 65. Outer spiral heat exchange fins; 66. Drain pipe; 67. Hot air blower; 68. Air inlet pipe. DETAILED DESCRIPTION

[0042] The following is a further detailed description of a nonwoven fabric spunlace device, method and production system proposed by the present invention in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the accompanying drawings represent the same or similar components.

[0043] Example, see Figure 1-11A non-woven fabric spunlace production system includes a horizontal and flat pre-wetting box 1, with a pre-wetting inlet 2 and a pre-wetting outlet 3 respectively provided on both sides of the pre-wetting box 1, multiple pre-wetting guide rollers 4 are rotatably connected in the pre-wetting box 1, and the non-woven fabric alternately passes around the pre-wetting guide rollers 4 in a serpentine shape, and multiple strip-shaped exhaust holes 6 are provided on the outer side of the lower part of the pre-wetting box 1. The upper end of the pre-wetting box 1 is connected to a wet inlet chamber 7, and the upper end of the wet inlet chamber 7 is connected to a humidification pipe 8. The upper end of the pre-wetting box 1 is provided with multiple wet inlet holes 9 connected to the wet inlet chamber 7, and an atomizer 10 is provided at the upper end of the wet inlet chamber 7. The atomizer 10 is connected to an atomizing pipe 11 connected to the humidification pipe 8 near the pre-wetting box 1, and the atomizer 10 is connected to a water replenishment pipe 12 for replenishing water.

[0044] A casing 13 is arranged on one side of the prewet outlet 3 of the prewet box 1. A water spurt inlet 14 and a water spurt outlet 15 corresponding to the prewet outlet 3 are opened on one side of the casing 13 close to the prewet box 1. A fixed cylinder 16 is horizontally connected to the inside of the casing 13. A movable roller 17 is rotatably connected to the outside of the fixed cylinder 16. The thickness of the movable roller 17 is 1.5-2mm. A circle of support rings 18 are arranged outward at both ends of the fixed cylinder 16. A circle of rotating rings 19 corresponding to the support rings 18 are arranged at both ends of the movable roller 17. A connecting bearing 20 is arranged between each support ring 18 and the corresponding rotating ring 19, so that the movable roller 17 can rotate more smoothly.

[0045] The housing 13 is provided with an outer high-pressure nozzle 21 along the length direction of the movable roller 17. The outer high-pressure nozzle 21 is connected to a plurality of outer water jet nozzles 22 distributed along the length direction. Each outer water jet nozzle 22 is arranged toward the axis direction of the fixed cylinder 16. Each adjacent outer water jet nozzle 22 on the outer high-pressure nozzle 21 is staggered left and right to reduce mutual interference during water jet reflection. The housing 13 is provided with an inner high-pressure nozzle 23 along the length direction of the fixed cylinder 16. The inner high-pressure nozzle 23 is connected to a plurality of inner water jet nozzles 24 distributed along the length direction. Each inner water jet nozzle 24 is arranged radially outward from the axis of the fixed cylinder 16. Each adjacent inner water jet nozzle 24 on the inner high-pressure nozzle 23 is staggered left and right to reduce mutual interference during water jet reflection.

[0046] The fixed cylinder 16 is provided with a plurality of spurting holes 25 corresponding one-to-one with the inner spurting nozzles 24, so that the spurting water can pass through the spurting holes 25. The movable roller 17 is connected by a plurality of reflection rings. A spurting gap 26 corresponding one-to-one with the outer spurting nozzles 22 and the inner spurting nozzles 24 is left between each two reflection rings. Each two reflection rings are connected by a plurality of connecting pieces 27 arranged in the axial direction of the fixed cylinder 16. The connecting piece 27 is as thin as possible to reduce the interference with the spurting water during rotation. The outer side of the fixed cylinder 16 is provided with a plurality of outward reflecting grooves 28 corresponding one-to-one to the outer water jet nozzles 22, and the depth of the outward reflecting grooves 28 is 2-3 mm, so that the water jet can be regularly reflected to the surroundings after contacting the outward reflecting grooves 28. The casing 13 is provided with an arc-shaped reflecting strip 29 matched with the inner water jet nozzle 24 outside the movable roller 17, and the arc-shaped reflecting strip 29 is provided with a plurality of inward reflecting grooves 30 corresponding one-to-one to the inner water jet nozzle 24 on the side facing the movable roller 17, and the depth of the outward reflecting grooves 28 is 2-3 mm, so that the water jet can be regularly reflected to the surroundings after contacting the outward reflecting grooves 28.

[0047] The lower end of the casing 13 is a water collecting trough 31, and a water storage tank 32 is arranged outside the casing 13. The bottom of the water collecting trough 31 is connected to the upper part of the water storage tank 32 through a water guide pipe 33. The upper part of the water storage tank 32 is connected to a water adding pipe 34 for replenishing water into the water storage tank 32. A high-pressure water pump 35 is arranged in the water storage tank 32. The inlet end of the high-pressure water pump 35 is connected to an impurity filter 36 to filter out debris and impurities generated during water spurting. The outlet end of the high-pressure water pump 35 is connected to a high-pressure water pipe 37. The external high-pressure nozzle 21 and the internal high-pressure nozzle 23 are connected to the high-pressure water pipe 37 through a connecting pipe 38.

[0048] A horizontal and flat negative pressure dehydration box 39 is arranged on one side of the casing 13 close to the pre-wetting box 1. A negative pressure inlet 40 and a negative pressure outlet 41 corresponding to the water spurt outlet 15 are respectively opened on both sides of the negative pressure dehydration box 39. Two oppositely arranged extrusion dehydration rollers 42 are rotatably connected at the negative pressure inlet 40 in the negative pressure dehydration box 39. A driving motor 43 is installed on the outer side of the negative pressure dehydration box 39. The power output shaft of the driving motor 43 is connected to one end of one of the extrusion dehydration rollers 42 to provide traction for the non-woven fabric to move. At the same time, after the non-woven fabric passes between the two extrusion dehydration rollers 42, the moisture on the non-woven fabric can be squeezed out and falls into the water collecting tank 31. A plurality of dehydration guide rollers 44 are rotatably connected in the negative pressure dehydration box 39, and the non-woven fabric alternately passes around the dehydration guide rollers 44 in a serpentine shape. A negative pressure cavity 45 is arranged at the lower end of the negative pressure dehydration box 39, and a plurality of negative pressure suction holes 46 connected to the negative pressure cavity 45 are arranged at the lower end of the negative pressure dehydration box 39, so that the negative pressure dehydration box 39 can receive a more uniform downward negative pressure. A water collecting box 47 is arranged on one side of the negative pressure dehydration box 39, and the lower end of the negative pressure cavity 45 is connected to the water collecting box 47. The upper part of the water collecting tank 31 is connected through a negative pressure pipe. A negative pressure pump 48 is installed at the upper end of the water collecting tank 31. The inlet end of the negative pressure pump 48 is connected to the upper end of the water collecting tank 47. A drainage pipe 49 is connected between the lower end of the water collecting tank 47 and the upper part of the water storage tank 32. A solenoid valve 50 is arranged on the drainage pipe 49. When there is more water in the water collecting tank 31, the solenoid valve 50 is opened to allow the water in the water collecting tank 31 to flow into the water storage tank 32 through the drainage pipe 49.

[0049] A horizontal and flat drying box 51 is arranged on the side of the negative pressure dehydration box 39 away from the casing 13. A drying inlet 52 and a drying outlet 53 corresponding to the negative pressure outlet 41 are respectively opened on both sides of the drying box 51. A plurality of drying guide rollers 54 are rotatably connected in the drying box 51, and the non-woven fabric is alternately wound around the drying guide rollers 54 in a serpentine shape. A hot air cavity 55 connected thereto is arranged at the lower end of the drying box 51, and a hot air pipe 56 is connected to the lower end of the hot air cavity 55. A plurality of hot air holes 57 connected to the hot air cavity 55 are opened at the lower end of the drying box 51. A dehumidification cavity 58 connected thereto is arranged at the upper end of the drying box 51, and a dehumidification pipe 59 is connected to the upper part of the dehumidification cavity 58. A plurality of dehumidification holes 60 connected to the dehumidification cavity 58 are opened at the upper end of the drying box 51, so that hot air can pass through the drying box 51 evenly from bottom to top.

[0050] A vertically arranged heat exchange cylinder 61 is arranged outside the drying box 51, and a plurality of air inlet holes 62 are provided on the side wall of the upper part of the heat exchange cylinder 61. A hot air cylinder 63 is arranged inside the heat exchange cylinder 61. An inner spiral heat exchange fin 64 is arranged inside the heat exchange cylinder 61. The inner spiral heat exchange fin 64 drains the hot air, slowly transfers the heat to the cold air, and condenses the moisture in the hot air into water droplets on the inner spiral heat exchange fin 64. A plurality of outer spiral heat exchange fins 65 are arranged between the inner wall of the heat exchange cylinder 61 and the outer wall of the hot air cylinder 63. Through the outer spiral heat exchange fins 65, the cold air can quickly absorb heat and heat up. The dehumidification pipe 59 is connected to the upper end of the hot air cylinder 63, and the lower end of the hot air cylinder 63 is connected to the humidification pipe 8. The lower end of the hot air cylinder 63 is connected to a drain pipe 66 connected to the water storage tank 32, so that the condensed water flows into the water storage tank 32 along the drain pipe 66. A hot air blower 67 is arranged outside the drying box 51. The inlet end of the hot air blower 67 is connected to the lower part of the heat exchange tube 61 through an air inlet pipe 68, and the outlet end of the hot air blower 67 is connected to the hot air pipe 56. After the preliminary heated air passes through the hot air blower 67, a hot air flow with a sufficient temperature is formed for drying non-woven fabrics.

[0051] The process of spunlace nonwoven fabrics includes the following steps:

[0052] S1. After the non-woven fabric is opened, it is sprayed and pre-wetted to make the moisture content of the non-woven fabric reach 28%-35%, specifically:

[0053] The nonwoven fabric enters the prewetting box 1 from the prewetting inlet 2, alternately passes around the prewetting guide roller 4 in a serpentine shape, and is led out from the prewetting outlet 3. The moist air enters the prewetting box 1 through the atomizer 10 and the atomizing tube 11, passes downward through the nonwoven fabric, and the moisture in the air is absorbed by the nonwoven fabric, thereby increasing the moisture content of the nonwoven fabric.

[0054] S2, the nonwoven fabric horizontally passes around the movable roller 17, so that it passes through the outer spunlacing nozzle 22 and the inner spunlacing nozzle 24 in sequence, specifically:

[0055] The non-woven fabric enters the housing 13 from the spunlace inlet 14, bypasses the movable roller 17, passes through the arc-shaped reflective strip 29, and finally passes through the spunlace outlet 15. During the spunlace process, the high-pressure water pump 35 pumps water to generate high-pressure water, and finally forms spunlace that passes through the non-woven fabric. After reflection, the fibers of the non-woven fabric are entangled. The water generated during the process drops into the water collection tank 31, and then flows into the water storage tank 32 along the connecting pipe 38, so that the water source can be recycled;

[0056] S3, the external spunlacing nozzle 22 is directed toward the non-woven fabric to perform spunlacing on the outside. After the water needle passes through the non-woven fabric and the spunlacing gap 26, it is reflected on the surface of the fixed cylinder 16. The pressure is 80-150 bar and the diameter of the water needle is 0.12 mm.

[0057] S4, the inner spunlacing nozzle 24 is directed toward the non-woven fabric to perform spunlacing on the inner surface, and the water needle passes through the spunlacing through hole 25, the spunlacing gap 26 and the non-woven fabric, and is reflected on the arc-shaped reflection strip 29, with a pressure of 120-180 bar and a water needle diameter of 0.12 mm;

[0058] S5. After the spunlace is completed, the nonwoven fabric is dehydrated and dried, specifically:

[0059] S51, the non-woven fabric first passes through two squeezing and dehydrating rollers 42, the two squeezing and dehydrating rollers 42 rotate and squeeze the non-woven fabric, pull the non-woven fabric forward, and squeeze the water on the non-woven fabric into the water storage tank 32;

[0060] S52, the non-woven fabric enters the negative pressure dehydration box 39, and alternately bypasses the dehydration guide roller 44 in a serpentine shape, and a negative pressure is generated in the negative pressure dehydration box 39 by the negative pressure pump 48, so that the water on the non-woven fabric is drawn downward under the action of the negative pressure and flows into the water collecting box 47, and finally flows into the water storage tank 32 for recycling;

[0061] S53, finally the non-woven fabric enters the drying box 51, and alternately bypasses the drying guide roller 54 in a serpentine shape. The hot air blower 67 generates hot air, which blows from the bottom to the non-woven fabric upward, gradually taking away the moisture on the non-woven fabric, and completing the drying of the non-woven fabric. The hot and humid air enters the hot air cylinder 63 along the dehumidification pipe 59, and continuously flows downward along the inner spiral heat exchange fins 64. During the process, the hot air blower 67 draws air from the heat exchange cylinder 61, and the air enters from the air inlet 62, and continuously absorbs the heat of the hot and humid air downward along the outer spiral heat exchange fins 65, so that the air is preheated before entering the hot air blower 67, and part of the moisture in the hot and humid air condenses into water droplets on the inner spiral heat exchange fins 64, and finally flows into the water storage tank 32 for recycling. The remaining moisture enters the pre-wetting box 1 through the atomization pipe 11, and the non-woven fabric is pre-humidified, so that the heat and moisture can be fully recycled.

[0062] It should also be noted that all the "settings" and similar descriptive words in this application (especially the specification) express that there is or exists a connection relationship between two structures, but there is no excessive limitation on the specific means by which the two are connected, and it is usually a conventional connection means, that is, it should be understood that the means are prior art and there is no need for excessive elaboration. For example, "n is set on m" only expresses that there is n structure on m structure, and the two are specifically connected by welding, riveting, adhesive connection or integral molding, which are all within the protection scope of this application; for another example, "y is rotatably set on x" only expresses that y and x can rotate relative to each other, and whether the two are connected by bearing rotation, or y directly passes through x and is connected to x rotationally, or other feasible methods, are all within the protection scope of this application.

[0063] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A nonwoven fabric spunlace device, comprising a housing (13), characterized in that: A fixed cylinder (16) is transversely connected inside the housing (13), and a movable roller (17) is rotatably connected outside the fixed cylinder (16). An external high-pressure nozzle (21) is provided outside the movable roller (17) along its length direction of the housing (13). The external high-pressure nozzle (21) is connected to a plurality of external water jet nozzles (22) distributed along its length direction, and each external water jet nozzle (22) is arranged toward the axial direction of the fixed cylinder (16). An internal high-pressure nozzle (23) is provided inside the fixed cylinder (16) along its length direction of the housing (13). The internal high-pressure nozzle (23) is connected to a plurality of internal water jet nozzles (24) distributed along its length direction, and each internal water jet nozzle (24) is arranged radially outward from the axis of the fixed cylinder (16); The fixed cylinder (16) is provided with a plurality of water spurting through holes (25) corresponding one-to-one with the inner water spurting nozzle (24); the movable roller (17) is connected by a plurality of reflection rings; a water spurting gap (26) corresponding one-to-one with the outer water spurting nozzle (22) and the inner water spurting nozzle (24) is reserved between each two reflection rings; each two reflection rings are connected by a plurality of connecting plates (27) arranged in the axial direction of the fixed cylinder (16); the outer side of the fixed cylinder (16) is provided with a plurality of outward reflection grooves (28) corresponding one-to-one with the outer water spurting nozzle (22); the housing (13) is provided with an arc reflection strip (29) matched with the inner water spurting nozzle (24) outside the movable roller (17); the arc reflection strip (29) is provided with a plurality of inward reflection grooves (30) corresponding one-to-one with the inner water spurting nozzle (24) on the side facing the movable roller (17).

2. A nonwoven fabric spunlace device according to claim 1, characterized in that: Both ends of the fixed cylinder (16) are provided with support rings (18) facing outwards, and both ends of the movable roller (17) are provided with rotating rings (19) corresponding to the support rings (18) one by one, and a connecting bearing (20) is provided between each support ring (18) and the corresponding rotating ring (19).

3. A nonwoven fabric spunlace device, method and production system according to claim 1, characterized in that: Each adjacent two outer water jet nozzles (22) on the outer high-pressure nozzle (21) are staggeredly distributed left and right, and each adjacent two inner water jet nozzles (24) on the inner high-pressure nozzle (23) are staggeredly distributed left and right.

4. A nonwoven spunlace method, using a nonwoven spunlace device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. After the non-woven fabric is opened, it is sprayed and pre-wetted to make the moisture content of the non-woven fabric reach 28%-35%; S2, the nonwoven fabric horizontally passes around the movable roller (17) so as to pass through the outer spunlacing nozzle (22) and the inner spunlacing nozzle (24) in sequence; S3, the external spunlacing nozzle (22) is directed toward the non-woven fabric to perform spunlacing on the outside, and after the spunlacing nozzle passes through the non-woven fabric and the spunlacing gap (26), it is reflected on the surface of the fixed cylinder (16), the pressure is 80-150 bar, and the diameter of the spunlacing nozzle is 0.12 mm; S4, the inner spunlacing nozzle (24) is directed toward the non-woven fabric to perform spunlacing on the inner surface, the spunlacing needles pass through the spunlacing holes (25), the spunlacing gaps (26) and the non-woven fabric, and are reflected on the arc-shaped reflection strips (29), the pressure is 120-180 bar, and the diameter of the spunlacing needles is 0.12 mm; S5. After the spunlace is completed, the nonwoven fabric is dehydrated and dried.

5. A non-woven fabric spunlace production system, based on a non-woven fabric spunlace device according to any one of claims 1 to 3, characterized in that: A pre-wetting box (1) is arranged on one side of the casing (13); a water spurting inlet (14) and a water spurting outlet (15) are provided on one side of the casing (13) close to the pre-wetting box (1); a pre-wetting inlet (2) and a pre-wetting outlet (3) corresponding to the water spurting outlet (15) are respectively provided on both sides of the pre-wetting box (1); a plurality of pre-wetting guide rollers (4) are rotatably connected in the pre-wetting box (1); a humidifying pipe (8) is connected to the upper end of the pre-wetting box (1); and a plurality of exhaust holes (6) are provided on the outer side of the lower part of the pre-wetting box (1); The lower end of the housing (13) is a water collecting trough (31), and a water storage tank (32) is arranged outside the housing (13). The bottom of the water collecting trough (31) is connected to the upper part of the water storage tank (32) through a water guide pipe (33), and the upper part of the water storage tank (32) is connected to a water supply pipe (34). A high-pressure water pump (35) is arranged in the water storage tank (32), and the outlet end of the high-pressure water pump (35) is connected to a high-pressure water pipe (37). The external high-pressure nozzle (21) and the internal high-pressure nozzle (23) are both connected to the high-pressure water pipe (37) through a connecting pipe (38); A negative pressure dehydration box (39) is arranged on one side of the casing (13) close to the pre-wetting box (1), and negative pressure inlets (40) and negative pressure outlets (41) corresponding to the water spurting outlets (15) are respectively provided on both sides of the negative pressure dehydration box (39), and a plurality of dehydration guide rollers (44) are rotatably connected in the negative pressure dehydration box (39), and a water collecting box (47) in communication with the negative pressure dehydration box (39) is arranged on one side of the negative pressure dehydration box (39), and a negative pressure pump (48) is installed at the upper end of the water collecting tank (31), and the inlet end of the negative pressure pump (48) is in communication with the upper end of the water collecting box (47), and a drainage pipe (49) is in communication between the lower end of the water collecting box (47) and the upper part of the water storage tank (32), and a solenoid valve (50) is arranged on the drainage pipe (49); A drying box (51) is arranged on a side of the negative pressure dehydration box (39) away from the housing (13); a drying inlet (52) and a drying outlet (53) corresponding to the negative pressure outlet (41) are respectively opened on both sides of the drying box (51); a plurality of drying guide rollers (54) are rotatably connected in the drying box (51); a hot air pipe (56) is connected at the lower end of the drying box (51); and a dehumidification pipe (59) is connected at the upper end of the drying box (51); A vertically arranged heat exchange cylinder (61) is arranged outside the drying box (51), a plurality of air inlet holes (62) are opened on the side wall of the upper part of the heat exchange cylinder (61), a hot air cylinder (63) is arranged inside the heat exchange cylinder (61), and the hot air cylinder (63) is provided with inner spiral heat exchange fins (64) inside the heat exchange cylinder (61), and a plurality of outer spiral heat exchange fins (65) are arranged between the inner wall of the heat exchange cylinder (61) and the outer wall of the hot air cylinder (63), and the dehumidification pipe (61) is provided with a plurality of outer spiral heat exchange fins (65) between the inner wall of the heat exchange cylinder (61) and the outer wall of the hot air cylinder (63). 59) is connected to the upper end of the hot air cylinder (63), the lower end of the hot air cylinder (63) is connected to the humidifying pipe (8), the lower end of the hot air cylinder (63) is connected to a drain pipe (66) connected to the water storage tank (32), a hot air blower (67) is arranged outside the drying box (51), the inlet end of the hot air blower (67) is connected to the lower part of the heat exchange cylinder (61) through an air inlet pipe (68), and the outlet end of the hot air blower (67) is connected to the hot air pipe (56).

6. A nonwoven fabric spunlace production system according to claim 5, characterized in that: The upper end of the pre-wetting box (1) is connected to a wet inlet chamber (7), the humidifying pipe (8) is connected to the wet inlet chamber (7), the upper end of the pre-wetting box (1) is provided with a wet inlet hole (9) connected to the wet inlet chamber (7), the upper end of the wet inlet chamber (7) is provided with an atomizer (10), the atomizer (10) is connected to an atomizing pipe (11) near the pre-wetting box (1) with the humidifying pipe (8), and the atomizer (10) is connected to a water replenishing pipe (12) for replenishing water.

7. A nonwoven fabric spunlace production system according to claim 5, characterized in that: The inlet end of the high-pressure water pump (35) is connected to an impurity filter (36).

8. The nonwoven fabric spunlace production system according to claim 5, characterized in that: Two oppositely arranged squeezing and dehydrating rollers (42) are rotatably connected at the negative pressure inlet (40) in the negative pressure dehydrating box (39), and a driving motor (43) is installed on the outside of the negative pressure dehydrating box (39). The power output shaft of the driving motor (43) is connected to one end of one of the squeezing and dehydrating rollers (42).

9. A nonwoven fabric spunlace production system according to claim 5, characterized in that: The lower end of the negative pressure dehydration box (39) is provided with a negative pressure chamber (45), and the lower end of the negative pressure dehydration box (39) is provided with a negative pressure suction hole (46) connected to the negative pressure chamber (45). The lower end of the negative pressure chamber (45) is connected to the upper part of the water collecting box (47) through a negative pressure pipe.

10. A nonwoven spunlace production system according to claim 5, characterized in that: The lower end of the drying box (51) is provided with a hot air cavity (55) in communication therewith, the hot air pipe (56) is in communication with the lower end of the hot air cavity (55), the lower end of the drying box (51) is provided with a hot air hole (57) in communication with the hot air cavity (55), the upper end of the drying box (51) is provided with a dehumidification cavity (58) in communication therewith, the dehumidification pipe (59) is in communication with the upper part of the dehumidification cavity (58), and the upper end of the drying box (51) is provided with a dehumidification hole (60) in communication with the dehumidification cavity (58).

Images