CN105350182B - The Processes and apparatus of staple fibre continuous yarn non-woven fabrics is prepared based on dry spinning technology - Google Patents

Abstract

The invention discloses a process for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, comprising the following steps: spinning process (1), preparation of spinning stock solution; (2), liquid coagulation reaction and recovery of nitrogen Methylmorpholine oxide (NMMO), (3), artificial fiber molding; (4), washing; (5), drafting: non-woven fabric forming process; (6), laying: drying the The primary fiber tow is evenly dispersed and placed on the net curtain of the web forming machine to form a cross-stacked filament web; (7), spunlace reinforcement; (8), drying; (9), winding. The equipment consists of dry spinning device and non-woven fabric forming device. The relevant steps are omitted in the steps of the traditional dry spinning process, and the semi-finished man-made fiber filaments are directly used for the production of non-woven fabrics. This process breaks the traditional concept of using finished fiber filaments for secondary production of non-woven fabrics, and The production cost is effectively saved, the environmental pollution in the process is reduced, and the production efficiency is improved.

Description

Process and equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology

technical field

The invention belongs to the technical field of textiles, and in particular relates to a process and equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology.

Background technique

Non-woven fabric (English name: Non Woven Fabric or Nonwoven cloth), also known as non-woven fabric, is a kind of non-woven fabric, which is composed of oriented or random fibers. Light, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low in price, and recyclable. For example, polypropylene (pp material) pellets are mostly used as raw materials, which are produced by continuous one-step process of high-temperature melting, spinning, laying, and hot-pressing coiling. It is called cloth because of its appearance and certain properties. Because it is a fabric that does not need spinning and weaving, it is just oriented or random arrangement of short textile fibers or filaments to form a web structure, and then reinforced by mechanical, thermal bonding or chemical methods. A new fiber product with soft, breathable and planar structure. The advantage is that it does not produce lint, is strong, durable, and silky soft. It is also a kind of reinforcing material, and it also has a cotton feel. Compared with cotton fabrics, non-woven fabrics Cloth bags are easy to form and inexpensive to make. Non-woven products are rich in color, bright and bright, fashionable and environmentally friendly, widely used, beautiful and elegant, with various patterns and styles, and are light in weight, environmentally friendly, and recyclable. They are internationally recognized as environmentally friendly products that protect the earth's ecology. Applicable to agricultural film, shoemaking, tanning, mattresses, quilts, decoration, chemical industry, printing, automobiles, building materials, furniture and other industries, as well as clothing interlining, medical disposable surgical gowns, masks, caps, bed sheets, hotels Disposable tablecloths, beauty, sauna and even today's fashionable gift bags, boutique bags, shopping bags, advertising bags and so on. Environmentally friendly products, versatile and economical. According to different application fields, it can have: light weight, softness, water repellency, breathability, non-toxic, non-irritating, antibacterial, chemical resistance, antibacterial. At present, the preparation of non-woven fabrics is mainly to directly use high polymer (spinning) chips, short fibers or filaments to form fibers through airflow or machinery, and then undergo spunlace, needle punching, or hot rolling reinforcement, and finally after finishing to form The non-woven fabric, that is, the fiber is prepared after dry spinning, which can be carded into a web with short fibers, or spun into a web with filament filaments. The production process mainly includes spunbond, meltblown, thermal Rolling method, spunlace method, acupuncture method. Because it is a fabric that does not need spinning and weaving, it is just oriented or random arrangement of short textile fibers or filaments to form a web structure, and then reinforced by mechanical, thermal bonding or chemical methods. Nonwovens have broken through the traditional textile principles, and have the characteristics of short process flow, fast production rate, high output, low cost, wide application, and multiple sources of raw materials.

Filament non-woven fabrics are prepared by spunbond method in the textile field and actual production. After the polymer has been extruded and stretched to form continuous filaments, the filaments are laid into a web, and the fibers The web is then self-bonded, thermally bonded, chemically bonded or mechanically reinforced to make the web into a non-woven fabric. Preparation of non-woven fabrics from continuous filaments: spunbond method; preparation of non-woven fabrics from short fibers: mixing, opening, carding into a web, and reinforcement by acupuncture, spunlace or thermal bonding. Compared with short-fiber non-woven fabrics, filament non-woven fabrics can make non-woven fabrics thinner and stronger, but at present, most filament non-woven fabrics are prepared by spunbond method, and the fibers can only be polyester and polypropylene fibers. Hot-melt synthetic fibers such as nylon, nylon and spandex cannot be prepared with regenerated fibers with superior performance. Although synthetic fibers have good strength, they are poor in softness, water absorption and comfort. are clearly restricted. At present, the main process steps of wet spinning are: spinning solution - coagulation bath - washing - winding - clustering - stretching - crimping - cutting - secondary washing - wet opening - drying - opening - packaging. The specific technological process is: ①The preparation of viscose: including dipping, pressing, crushing, aging, yellowing, dissolving, ripening, filtering, degassing and other processes. ② Spinning and forming: wet spinning is adopted. The viscose forms a fine flow through the spinneret hole and enters the acid-containing coagulation bath. The alkali in the viscose is neutralized, the thin flow is solidified into filaments, and the cellulose xanthate is transformed and regenerated into cellulose. ③ Post-processing: After forming, the fibers need to be washed, neutralized, washed, oiled, and dried. Wet spinning not only requires various and bulky dope preparation and pre-spinning preparation equipment, but also coagulation bath, circulation and recovery equipment. The process is complicated, the investment cost of plant construction and equipment is large, and the spinning speed is low. Therefore, the cost higher. This method can produce short fibers and long filaments. The traditional application is that the short fibers are directly blended with other fibers, and then carded into a web for the production of non-woven fabrics. The filaments are packed and sent directly to Knit or weave on a loom. It can be seen from this that in order to obtain filament non-woven fabrics, it can only be obtained by dry spinning through spunbonding and then reinforced. For the production of non-woven fabrics, due to the complicated process and high cost of wet spinning, doing so will greatly increase the production cost of non-woven fabrics and increase the complexity of the process.

In summary, although dry spinning can produce man-made fibers at present, no one in the field of actual production and research and development has thought of using dry spinning technology to obtain man-made fiber filaments and then laying a net to prepare man-made fiber filament non-woven fabrics. Methods.

Contents of the invention

Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide a low-cost, easy-to-operate, energy-saving and consumption-reducing, one-step molding that effectively shortens the spinning process steps, greatly reduces the degree of pollution, and improves the performance of non-woven fabrics. The process and equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology and production efficiency.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a process for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, which is characterized in that: comprising the following steps:

(1), spinning process

(1) Preparation of spinning stock solution: Pulp raw materials are obtained from trees, grasses and other raw materials. The pulp raw materials are sequentially impregnated, ground, pressed and pulverized, and the sulfate slurry obtained after cooking with a mixture of sodium hydroxide and sodium sulfide , the sulfate slurry is washed in running water, dehydrated; then alternately dipped in sodium carbonate solution and dilute sulfuric acid sol-pressed dry-washed twice to obtain cellulose; the cellulose is added to nitrogen methylmorpholine oxide ( NMMO) solution, and obtain spinning dope after defoaming;

(2) Solidification reaction of stock solution and recovery of nitrogen methyl morpholine oxide (NMMO) In the tunnel, the action of the spinning dope in the hot air flow makes the nitrogen methyl morpholine oxide (NMMO) in the thin stream of the dope volatilize quickly, and the volatilized nitrogen methyl morpholine oxide (NMMO) vapor is carried by the hot air flow Go, the stock solution solidifies while gradually removing the solvent, and elongates and becomes thinner under the action of winding tension to form nascent fibers;

(3) Man-made fiber forming: the thin stream of raw liquid is solidified into nascent fiber, which is exported by godet roller;

(4), washing: wash the exported man-made fibers;

(5), drafting: Stretch the primary fiber to improve the mechanical properties of the fiber;

(two), non-woven fabric forming process

(6) Laying: Evenly disperse the stretched fiber filaments and lay them on the netting curtain of the web forming machine, and through the reciprocating laying of the netting curtain of the web forming machine, the filament webs are formed to cross each other and stack on top of each other. output curtain;

(7) Spunlace reinforcement: use high-pressure water flow to spunlace the cross-stacked filament webs, so that the fibers are entangled and reinforced to form a man-made fiber non-woven fabric;

(8), drying: drying the man-made fiber non-woven fabric reinforced by spunlace;

(9) Rolling: the dried man-made fiber non-woven fabric is rolled and packaged.

The above-mentioned process for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the artificial fiber filaments are reciprocally stacked above the web forming machine's web curtain perpendicular to the moving direction of the web forming machine's web curtain, and formed into a web The machine-laid net curtain moves in a straight line at a uniform speed while the man-made fiber filament web reciprocates and stacks, and the man-made fibers are evenly dispersed and cross-stacked.

The above-mentioned process for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the oscillation frequency of the artificial fiber filament is 10 to 160 times/min, and the linear motion speed of the web forming machine is 5-80m /min.

The above-mentioned process for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, in the spinning process step, the as-spun fibers after washing are subjected to drafting treatment, and after spunlace into cloth, longitudinal and transverse stretching is carried out. stretch.

A kind of equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, comprising a dry spinning device, the dry spinning device includes a spinning stock solution container with an injection port, a spinning stock solution The metering pump connected to the container is connected with a spinneret and a spinning tunnel for solidifying the spinning liquid ejected from the spinneret. The spinneret extends into the spinning tunnel and spins At the bottom of the shaft, there is a hot air inlet and an output port for guiding the solidified rayon tow, and at the top of the spinning shaft, there is a hot air outlet and an outlet connected to the hot air outlet for recovering nitrogen methyl morpholine oxide. (NMMO) collection container, a water washing device is installed at the output port, and also includes a forming device that guides the output wet rayon tow through the godet roll, stacks the rayon tow and reinforces the filament non-woven fabric .

In the above-mentioned equipment for preparing artificial fiber filament nonwoven fabrics based on dry spinning technology, the forming device includes a clustering and splitting device for concentrating and dispersing wet artificial fiber tows, and a clustering and splitting device A connected fiber stacking device for evenly dispersing and laying the split artificial fiber tows to form filament webs cross-stacked with each other. A web-forming machine net curtain on which man-made fiber tows are cross-stacked, at least one side of the web-forming machine net curtain is provided with a hydroentanglement device for hydroentangling the cross-stacked filament webs, the web-forming machine The output end of the net curtain is connected with a drying mechanism.

The above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the clustering and splitting device includes a pair of clustering and splitting rollers with one side meshing with each other forming the clustering end and the other side forming the splitting end, Splitting grooves for evenly combing the collected artificial fiber tows are arranged on the two bunching and splitting rollers.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the fiber stacking device includes a swinging body arranged perpendicular to the moving direction of the net curtain of the netting machine, and a plurality of openings that allow The guide wire hole through which the fiber passes, the swinging body is connected to a sliding seat, and a chute for guiding the swinging body to swing back and forth along the direction perpendicular to the moving direction of the net curtain of the net forming machine is arranged on the sliding seat, and the swinging body is provided with There are slide rails that cooperate with the chute.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, a hydraulic mechanism is connected to the swinging body for driving it to reciprocate and slide along the chute. The hydraulic mechanism includes a hydraulic cylinder connected to a hydraulic oil tank and a The hydraulic cylinder telescopically connects the hydraulic rod, and the hydraulic rod is connected with the swing body.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the net curtain of the web forming machine is connected with the winding mechanism through the drying mechanism.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, a drafting roller for improving the strength of artificial fiber tow is arranged between the godet roller and the clustering and splitting device, and the drafting roller It is composed of main drafting roller and auxiliary drafting roller.

The above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the forming device includes a conveying roller for spreading and conveying the wet fiber tow, and a conveying roller connected with the conveying roller for conveying and spreading The conveying net curtain of the wet fiber tow, the output end of the conveying net curtain is connected with a swinging net curtain for reciprocally stacking the wet fiber tow into a wet fiber tow net, and the output end of the swinging net curtain is provided with a For the web forming machine net curtain that crosses the reciprocatingly stacked wet fiber tow nets layer by layer, at least one side of the web forming machine net curtain is provided with a hydroentanglement device for hydroentangling the cross-stacked wet fiber tow web, The output end of the net curtain of the web forming machine is connected with a drying mechanism.

The above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the swing net curtain includes two conveyor belts with transmission curtains arranged in parallel, and a conveyor belt with transmission wet fiber tow is formed between the two transmission curtains. Conveying cavity, the two conveying belts are provided with rotating parts that drive them to reciprocate and swing along the direction perpendicular to the movement of the net curtain of the net forming machine.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, a drafting roller for drafting wet fiber tow is arranged between the conveying roller and the conveying net curtain.

The above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the forming device includes conveying rollers for spreading and conveying wet fiber tows, a pair of conveying rollers that are in contact with each other and drive in the same direction The conveying system composed of the conveyor belt and the laying conveyor belt forms a clamping area for clamping the movement of the wet fiber tow at the contact point of the transmission conveyor belt and the laying conveyor belt. The transmission conveyor belt is driven by a transmission conveyor wheel. The running conveying mesh curtain, the laying conveyor belt includes the laying mesh curtain driven by the laying conveying wheel, and the contact between the conveying mesh curtain and the laying mesh curtain is respectively provided with a pair of wet fiber tows for reciprocating movement and stacking. The laying roller, and the tension roller that guides the wet fiber tow and moves in the same direction as the laying roller when the laying roller moves back and forth, the conveying system is provided with a waterproof layer, and the output end of the laying roller is provided with a A web-forming machine net curtain used to intersect the reciprocatingly stacked wet fiber tow nets with each other, and at least one side of the web-forming machine net curtain is provided with a hydroentanglement device for hydroentangling the cross-stacked wet fiber tow nets , the output end of the net curtain of the web forming machine is connected with a drying mechanism.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, a drafting roller for drafting wet fiber tow is arranged between the conveying roller and the conveying system.

In the above-mentioned equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology, the spinneret includes a body connected to the liquid inlet pipe, and a plurality of through holes are opened on one side of the body along the length direction of the body. The liquid spraying holes of the body, the liquid spraying holes are arranged in sequence along the length direction of the body, and several rows are arranged in sequence along the height direction of the body.

The advantages of the process and equipment for preparing artificial fiber filament non-woven fabrics based on dry spinning technology in the present invention are: omission of relevant steps in the steps of traditional dry spinning process, directly laying semi-finished artificial fiber filaments into The net and spunlace are reinforced to produce non-woven fabrics, and the wet fibers are laid directly on the net, eliminating the need for drying steps. This process breaks the traditional concept of using finished fiber filaments or short fibers for secondary production of non-woven fabrics. An innovative point of the invention reduces the water consumption and energy consumption in the process, effectively saves the production cost and improves the production efficiency. After the traditional man-made fibers are molded, post-processing is required, that is, the nascent man-made fibers are neutralized, washed, desulfurized, oiled, dried and other processes to produce finished man-made fibers. In the step of preparing the non-woven fabric, the present invention can not only increase the entanglement between the fibers through spunlace, make it more firm, but also serve the purpose of water washing. As a result, steps such as oiling, winding or cutting are omitted, which can be said to serve multiple purposes, which is the second innovation point of the present invention. Spunlace reinforcement also has water washing effect. The washing effect of high-pressure spunlace is far greater than that of water washing in traditional dry spinning post-processing, so the effect is better, and it saves the need for multiple preparation processes before traditional man-made fiber processing. The invention can overcome the defects of low strength, complex preparation process and large manual labor of the existing artificial staple fiber non-woven fabric, so as to realize the advantages of good firmness, simple preparation process and small manual labor. In the process of spunlace strengthening, the function of secondary washing of traditional dry spinning is realized, which saves process steps.

Description of drawings

Fig. 1 is a process flow diagram of the present invention;

Fig. 2 is the equipment structure schematic diagram of embodiment 1 of the present invention;

FIG. 3 is an enlarged schematic diagram of a side-view structure of a beam-concentrating and splitting device;

Fig. 4 is the enlarged schematic view of the structure of the beam-splitting roller;

Fig. 5 is a structural schematic diagram of the connection between the fiber stacking device and the hydraulic mechanism;

FIG. 6 is an enlarged view of the partial structure of part A in FIG. 5;

FIG. 7 is a schematic diagram of the device structure of Embodiment 3 of the present invention;

Fig. 8 is a schematic diagram of the device structure of Embodiment 4 of the present invention;

Fig. 9 is a schematic structural view of the spinneret of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail;

As shown in Figure 1, a kind of technology that prepares artificial fiber filament non-woven fabric based on dry spinning technology, is characterized in that: comprise the steps:

(1), spinning process

(1) Preparation of spinning stock solution: Pulp raw materials are obtained from trees, grasses and other raw materials. The pulp raw materials are sequentially impregnated, ground, pressed and pulverized, and the sulfate slurry obtained after cooking with a mixture of sodium hydroxide and sodium sulfide , the sulfate slurry is washed in running water, dehydrated; then alternately dipped in sodium carbonate solution and dilute sulfuric acid sol-pressed dry-washed twice to obtain cellulose; the cellulose is added to nitrogen methylmorpholine oxide ( NMMO) solution, and obtain spinning dope after defoaming;

(2) Solidification reaction of stock solution and recovery of nitrogen methyl morpholine oxide (NMMO) In the tunnel, the action of the spinning dope in the hot air flow makes the nitrogen methyl morpholine oxide (NMMO) in the thin stream of the dope volatilize quickly, and the volatilized nitrogen methyl morpholine oxide (NMMO) vapor is carried by the hot air flow Go, the stock solution solidifies while gradually removing the solvent, and elongates and becomes thinner under the action of winding tension to form nascent fibers;

(3) Man-made fiber forming: the thin stream of raw liquid is solidified into nascent fiber, which is exported by godet roller;

(4), washing: wash the exported man-made fibers;

(5), drafting: Stretch the primary fiber to improve the mechanical properties of the fiber;

(two), non-woven fabric forming process

(6) Laying: Evenly disperse the stretched fiber filaments and lay them on the netting curtain of the web forming machine, and through the reciprocating laying of the netting curtain of the web forming machine, the filament webs are formed to cross each other and stack on top of each other. output curtain;

(7) Spunlace reinforcement: use high-pressure water flow to spunlace the cross-stacked filament webs, so that the fibers are entangled and reinforced to form a man-made fiber non-woven fabric;

(8), drying: drying the man-made fiber non-woven fabric reinforced by spunlace;

(9) Rolling: the dried man-made fiber non-woven fabric is rolled and packaged.

In order to improve the overall strength of the finished non-woven fabric, in the spinning process step, the step of stretching the washed nascent fiber is added. In order to improve the overall strength of the finished non-woven fabric, the washing of the nascent fiber can be increased. In the step of drawing treatment, the longitudinal and transverse stretching can also be increased after the spunlace fabric is formed. It is also possible to carry out drafting treatment on the as-spun fibers after washing, and carry out longitudinal and transverse stretching after water entanglement into cloth.

Example 1:

As shown in Figures 2, 3, 4, 5, and 6, a device for preparing artificial fiber filament non-woven fabrics based on dry spinning technology consists of a dry spinning device 1 and a forming device 2. Spinning device 1 comprises a spinning stock solution container 3 that has injection port, a metering pump 4 that links to each other with spinning stock solution container 3, is connected with spinneret 5 on metering pump 4, and is used to spray spinneret 5 The solidified spinning shaft 6 of the spinning solution, the spinneret 5 extends into the spinning shaft 6, the bottom of the spinning shaft 6 is provided with a hot air inlet 7 and is used to export the solidified artificial fiber tow 11 The output port 8 of the spinning shaft 6 is provided with a hot air discharge port 65 and a collection container 66 for reclaiming nitrogen methylmorpholine oxide (NMMO) connected to the hot air discharge port 65, at the output port 8 The water washing device 10 is provided, and also includes a forming device 2 for deriving the output wet rayon tow 11 through the godet roller 9 , stacking and laying the rayon tow 11 and reinforcing the filament nonwoven fabric. The water washing device 10 can adopt ultrasonic cleaning or pure water spray cleaning commonly used in the art,

The forming device 2 includes a bundle splitting device 13 for concentrating and dispersing the viscose fiber tow 11. The bundle splitting device 13 includes a pair of mutually engaged one side to form a bundle end 14, and the other side to form a bundle end 15. The beam-splitting rollers 16 are provided with beam-splitting grooves 17 for evenly combing the collected man-made fiber tows 11 on the two bundle-splitting rollers 16. Open a plurality of successively at intervals, and form the converging area 18 that is used to collect artificial fiber tow 11 between two adjacent beam-splitting grooves 17 on a single bundle-splitting roller 16, when two bundle-splitter rollers 16 are meshed, An instantaneously closed beam splitting cavity 19 is formed between the two opposing beam splitting grooves 17, and is used to evenly disperse the artificial fiber tows 11 in the bundling area 18.

The non-woven fabric forming device 2 also includes a fiber stack connected to the clustering and splitting device 13 for uniformly dispersing and laying the split artificial fiber tows 11 to form a cross-stacked filament web 20 Device 21, one is located at fiber stacking device 21 below and is used to cooperate with fiber stacking device 21, and artificial fiber tow 11 is cross-stacked on the web forming machine laying curtain 22 on it, and forming machine laying curtain 22 is in Driven by the servo motor, it moves in a straight line at a uniform speed. At least one side of the netting curtain 22 of the web forming machine is provided with a hydroentanglement device 23 for hydroentangling the cross-stacked filament webs 20. According to the specific filament webs 20, cross-stacking The thickness of the non-woven fabric and the actual application field of the non-woven fabric, the spunlace equipment 23 can be single-sided or double-sided, and the spunlace equipment 23 can adopt the traditional equipment for non-woven fabric spunlace reinforcement at present. More details, of course, the number of spunlace heads can be reasonably selected according to the width of the web forming machine's web curtain 22. The web forming machine's web curtain 22 can be driven by a conveying roller, and the power source is provided by a geared motor, and the hydroentanglement is completed. Finally, a drying mechanism 24 is connected to the output end of the web forming machine laying curtain 22 . The fiber stacking device 21 comprises a swinging body 25 arranged perpendicular to the moving direction of the web forming machine's web curtain 22, the size of the swinging body 25 can be determined according to the size of the actual web forming machine's web curtain 22, on the swinging body 25, along the The moving direction of the web forming machine's netting curtain 22 is provided with a plurality of guide wire holes 26 that allow fibers to pass through, and a sliding seat 27 is connected to the bottom of the swinging body 25, and a sliding seat 27 is provided for guiding the swinging body 25 along the vertical direction. The chute 28 that swings back and forth in the direction of movement of the netting curtain 22 of the net forming machine is provided with a slide rail 29 that cooperates with the chute 28 on the swing body 25. This sliding fit structure is not unique, because in this process , the sliding fit requirements do not need to be strict, and those skilled in the art can use various methods such as air suspension and pneumatic to realize sliding. The oscillating body 25 can be driven by hydraulic pressure, or can be driven by a servo motor or a reduction motor. In this embodiment, a hydraulic mechanism 29 for driving the oscillating body 25 to slide back and forth along the chute 28 is connected to the oscillating body 25. The hydraulic mechanism 29 It includes a hydraulic cylinder 30 connected to the hydraulic oil tank and a hydraulic rod 31 telescopically connected to the hydraulic cylinder 30. The hydraulic rod 31 is connected to the swinging body 25. The hydraulic rod 31 drives the swinging body 25 while reciprocating in the web forming machine. 22 above the reciprocating swing, the hydraulic oil tank can be selected and placed according to the actual equipment, which is not listed in the accompanying drawings.

Example 2:

In order to meet the actual production needs, a winding mechanism 32 can be set at the output end of the web forming machine web curtain 22, and the filament fiber web 20 on the web forming machine web curtain 22 is dried by the drying mechanism 24 and then rolled. Mechanism 32 is directly wound and packaged. A drafting roll for improving the strength of the rayon tow 11 can also be optionally arranged between the godet roll 9 and the bundle splitting device 13 , and the drafting roll is composed of a main drafting roll 33 and a secondary drafting roll 34 .

Example 3:

The same parts of this embodiment and other embodiments will not be repeated, the difference is that a second forming device is provided, as shown in Figure 7, the forming device includes a device for spreading and transporting the wet fiber tow 35 Conveying roller 36, one is connected with conveying roller 36 and is used for conveying the conveying mesh curtain 37 of the wet fiber tow 35 after spreading, is provided with for drafting wet fiber tow between described conveying roller 36 and conveying mesh curtain 37 35 drafting rollers 38.

The output end 39 of conveying net curtain 37 is connected with a swing net curtain 41 that is used to reciprocally stack wet fiber tow 35 into wet fiber tow net 40, and the output end 42 of described swing net curtain 41 is provided with a The stacked wet fiber tow webs 40 intersect each other layer by layer with a web forming machine net curtain 43, and at least one side of the web forming machine web curtain 43 is provided with a hydroentanglement device for hydroentangling the cross-stacked wet fiber tow webs 40 44, the output end of the net curtain 43 of the web forming machine is connected with a drying mechanism 45. Swing net curtain 41 comprises two conveyer belts that have transmission curtain 46 that are arranged in parallel, form the conveyance cavity that has conveying wet fiber tow 35 between two transmission curtains 46, described two conveyer belts are provided with and drive it along perpendicular to forming. The rotating part of the net machine net curtain 43 reciprocatingly swings in the moving direction. The rotating part can choose a deceleration motor or a servo motor with a rack and pinion structure, and the reciprocating motion is controlled by a controller. This technology is an existing technology, and those skilled in the art can choose an appropriate way to implement it according to actual needs.

Example 4:

The same parts of this embodiment and other embodiments will not be repeated, the difference is that a third forming device is provided, as shown in Figure 8,

Described shaping device comprises the conveying roller 48 that is used for carrying out spreading conveying to wet fiber tow 47, a pair of conveying system that is made up of conveying conveyer belt 49 and laying conveyer belt 50 that contact each other and drive in the same direction, Belt 49 forms the clamping zone 51 that is used for clamping wet fiber tow 47 motions at the place that belt 49 contacts with laying conveyor belt 50, and described transmission conveyor belt 49 comprises the conveying net curtain 53 that drives operation by transmission conveying wheel 52, lays net The conveyer belt 50 comprises a laying net curtain 55 driven by a laying conveying wheel 54, and a pair of laying mats for reciprocating and stacking wet fiber tow 47 are respectively arranged at the contact positions of the conveying net curtain 53 and the laying net curtain 55. Screen roll 56, and the tension roll 57 that guides wet fiber tow 47 and moves in the same direction with laying roll 56 when web roll 56 reciprocates, adopts double-layer planar clamping belt mode to clamp wet fiber tow 47, can Prevents web drift and unintentional elongation caused by airflow disturbances at high speeds. The clamping belt is made of polyester filament interwoven with warp and weft, 0.7-1mm thick, and the surface is coated with synthetic rubber. A small amount of carbon powder is mixed in the coating to reduce the electrostatic adsorption of the curtain to the fiber, and it is placed on the transmission conveyor belt 49 and the laying net. A waterproof layer is set on the conveyer belt 50, and the output end of the laminating roller 56 is provided with a web forming machine net curtain 58 for intersecting the reciprocatingly stacked wet fiber tow net 57 layer by layer. At least one side is provided with a hydroentanglement device 59 for hydroentangling the cross-stacked wet fiber tow web 57 , and a drying mechanism 60 is connected to the output end of the web curtain 58 of the web forming machine. In order to improve the performance of the fiber, a drafting roller 61 for drafting the wet fiber tow 47 is arranged between the conveying roller 48 and the conveying system.

In each embodiment of the present invention, for the structure of the spinneret, the structure shown in Figure 9 can be selected, the spinneret 7 includes a body 62 connected to the liquid inlet pipe 8, along the length direction of the body 62 A side of the main body 62 is provided with a plurality of liquid spray holes 63 penetrating the main body. A plurality of liquid spray holes 63 are provided sequentially along the length direction of the main body 62 , and a plurality of rows are sequentially provided along the height direction of the main body 62 . Through the cooperation of the spinneret 7 and the godet roller 9, the spun tow 64 can be directly laminated into a parallel fiber web, similar to a waterfall form, which is more convenient for later cross-stacking and improves the effect of hydroentanglement , Improve the production efficiency of non-woven fabrics.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention shall all belong to protection scope of the present invention.

Claims (6)

1. a kind of technique preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, it is characterised in that：Including walking as follows Suddenly：

(1), spinning technique

(1), the preparation of spinning solution：Pulp material is obtained with trees, grass as raw material, pulp material is successively through dipping, grinding, pressure It squeezes and crushes, the sulfate slurries obtained after sodium hydroxide and vulcanized sodium mixed liquor boiling wash sulfate slurries in flowing water Only, it is dehydrated；Press dry using sodium carbonate liquor and dilute sulfuric acid colloidal sol alternating impregnating-- water displacement wash twice, obtain cellulose；It will Cellulose, which is added in N-methyl morpholine oxide (NMMO) solution, to be dissolved, and spinning solution is obtained after deaeration；

(2), stoste Hirschfeld-Klinger reaction and N-methyl morpholine oxide (NMMO) is recycled：Using duse process, by spinning solution through meter Amount pump extrudes from spinning head and squeezes out thread, and spinning solution makes stoste through spinning shaft, spinning solution in the effect of stream of hot air N-methyl morpholine oxide (NMMO) in thread is quickly volatilized, N-methyl morpholine oxide (NMMO) the steam quilt evaporated Stream of hot air is taken away, stoste gradually slough solvent while be cured, and under the action of winding tension elongation attenuate and Form as-spun fibre；

(3), staple fibre is molded：Stoste thread is solidified into as-spun fibre, is exported through godet；

(4), it washes：Washing process is carried out to derived staple fibre；

(5), drawing-off：As-spun fibre is stretched, to improve the mechanical property of fiber；

(2), non-woven fabrics moulding process

(6), lapping：It is fiber filament after drawing-off is evenly dispersed and be laid on lapper lace curtaining, pass through lapper lace curtaining Reciprocal laying forms intersected with each other be stacked on of filament web and exports on curtain, and the staple fibre long filament is above lapper lace curtaining Direction of motion reciprocally swinging perpendicular to lapper lace curtaining stacks, and lapper lace curtaining is in staple fibre filament web reciprocally swinging heap Make linear uniform motion while folded, the evenly dispersed intersection of staple fibre is stacked；

(7), spun lacing is reinforced：It is reinforced using high pressure water flow to intersecting the filament web spun lacing stacked so that mutually tangle between fiber It reinforces, forms rayon non-woven's cloth, and vertical, horizontal stretching is carried out in spun lacing Cheng Buhou；

(8), it dries：Rayon non-woven's cloth after being reinforced to spun lacing carries out drying and processing；

(9), it winds：Rayon non-woven's cloth winding after drying is packaged.

2. the technique according to claim 1 for preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, feature It is：The hunting frequency of the staple fibre long filament is 10~160 times/min, and the point-to-point speed of lapper lace curtaining is 5-80m/ min。

3. a kind of equipment preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, including a dry spinning device, institute It includes spinning solution container, the metering pump being connected with spinning solution container with inlet to state dry spinning device, Spinning head is connected on metering pump, and the cured spinning shaft of spinning solution for spraying spinning head, the spinning head are stretched Enter to spinning shaft, spinning shaft bottom is arranged hot air inlet and for will be defeated derived from cured staple fibre tow Outlet, is provided with hot-air outlet at the top of spinning shaft and what is be connected with hot-air outlet is used to recycle N-methyl Water washing device is arranged in delivery outlet in the collection vessel of oxide moiety (NMMO), it is characterised in that：Further include one by the wet people of output Fibre bundle is made after godet exports, staple fibre tow is stacked into lapping and reinforces the molding machine at continuous yarn non-woven fabrics, The molding machine includes one for by wet artificial cellosilk's constriction and the boundling beam splitting arrangement of dispersion, one with the boundling point Bundle device connection is used for the staple fibre tow after beam splitting is evenly dispersed and lays, and the long filament for forming stacking intersected with each other is fine The fiber stack device of net, one is used to match with fiber stack device below fiber stack device, by staple fibre Tow intersects the lapper lace curtaining stacked thereon, is provided in lapper lace curtaining at least one side for that will intersect the long filament stacked Fibre web carries out the Spunlace line of spun lacing reinforcing, and the output end of the lapper lace curtaining is connected with drier, the boundling beam splitting Device includes that a pair of side being engaged with each other forms boundling end, and the other side forms the boundling beam splitting roller at beam splitting end, in two boundlings The staple fibre tow for that will collect is offered on beam splitting roller combs uniform beam splitting slot, the fiber stack device packet One is included along the pendular body that be arranged perpendicular to the lapper lace curtaining direction of motion, offered on pendular body it is multiple allow fibers by Thread eye, the pendular body connect a slide, are provided on slide for guide swinging body along perpendicular to the lapper net The sliding slot of curtain direction of motion reciprocally swinging is provided with the sliding rail coordinated with sliding slot on the pendular body.

4. the equipment according to claim 3 for preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, feature It is：A hydraulic mechanism for driving it to reciprocatingly slide along sliding slot is connected on the pendular body, hydraulic mechanism includes connection liquid The hydraulic cylinder of pressure oil case and the hydraulic stem being connect with hydraulic cylinder extension, the hydraulic stem are connect with pendular body.

5. the equipment according to claim 4 for preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, feature It is：The lapper lace curtaining is connected through drier with rolling-up mechanism.

6. the equipment according to claim 3 for preparing staple fibre continuous yarn non-woven fabrics based on dry spinning technology, feature It is：The draw roll for improving artificial cellosilk's beam intensity power is provided between the godet and boundling beam splitting arrangement, it is described to lead Roller is stretched to be made of dominant draft roller and secondary draw roll.