CN113737390B - Production process and production system of regenerated cellulose fiber short fiber spunlace non-woven fabric - Google Patents

Production process and production system of regenerated cellulose fiber short fiber spunlace non-woven fabric Download PDF

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CN113737390B
CN113737390B CN202110995635.XA CN202110995635A CN113737390B CN 113737390 B CN113737390 B CN 113737390B CN 202110995635 A CN202110995635 A CN 202110995635A CN 113737390 B CN113737390 B CN 113737390B
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fiber
regenerated cellulose
woven fabric
cellulose
conveying
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CN113737390A (en
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暴峰
王众
张帅
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Wuhan Nanwang Environmental Protection Technology Research Co ltd
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Wuhan Nanwang Environmental Protection Technology Research Co ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/06—Distributing spinning solution or melt to spinning nozzles
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention provides a production process and a production system for producing spunlace non-woven fabric by a continuous method of renewable cellulose fibers, which are characterized in that natural cellulose is dissolved in a solvent to obtain a natural cellulose solution, wherein the solvent comprises the following components in percentage by mass: 4-12 wt% of sodium hydroxide, 3-8 wt% of urea, 3-6 wt% of thiourea and 5-9 wt% of PEG, and the balance of water; carrying out wet spinning on a natural cellulose solution to obtain regenerated cellulose fiber short fibers, wherein a coagulating liquid in the wet spinning comprises the following components in percentage by mass: caCl 2 5-8 wt%, HCl 2-3 wt%, chitosan 1-2 wt%, and the balance of water; the spinning pressure in the wet spinning is 3-8 MPa, and the aperture of the jet orifice is 0.05-0.1 mm; and (3) taking the regenerated cellulose fiber staple fibers, leaching, drying and dewatering, and then performing a spunlace non-woven fabric process to obtain the staple fiber non-woven fabric. Based on the method, the method realizes the wet spinning of the regenerated cellulose fiber staple fibers and the continuous production of the spun-laced non-woven fabric of the staple fibers, improves the production efficiency and reduces the production cost.

Description

Production process and production system of regenerated cellulose fiber short fiber spunlace non-woven fabric
Technical Field
The invention belongs to the technical field of spunlace non-woven fabrics, and particularly relates to a production process and a production system of regenerated cellulose fiber short fiber spunlace non-woven fabrics.
Background
The non-woven fabric is also called non-woven fabric, is a non-woven fabric, is formed by oriented or random fibers, is a new generation of environment-friendly material, and has the characteristics of moisture resistance, ventilation, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich color, low price, recycling and the like. If polypropylene (pp material) granules are mostly adopted as raw materials, the polypropylene composite material is produced by a continuous one-step method of high-temperature melting, spinning, lapping and hot-pressing coiling. It is referred to as a cloth because of its appearance and certain properties. Because it is a fabric formed without spinning a woven cloth, it is formed by simply orienting or randomly arranging textile staple fibers or filaments to form a web structure and then reinforcing them by mechanical, thermal or chemical means. A novel fabric product having a soft, air-permeable and planar structure, which is strong, durable, silky and soft without generating lint, is one of reinforcing materials, and has a cotton-like feeling, and a non-woven fabric bag which is easy to form and inexpensive as compared with cotton.
The spunlace non-woven fabric is prepared by taking high polymer fibers as a raw material, opening, mixing and carding the fibers to form a fiber network layer with a certain thickness, then spraying a plurality of high-pressure micro water jets to the fiber network layer, enabling the water jets to penetrate through the fiber network layer and then rebound by a net curtain, and then penetrating through the fiber network layer again. The fiber in the fiber net layer is displaced, interpenetrated, tangled and cohered under the action of high-pressure water jets in different directions, so that the fiber net is reinforced to have certain strength, and finally, the fiber net layer is subjected to post-finishing or surface coating to form the non-woven material. In recent years, the spunlace nonwoven fabric has the advantages of rapid technical development, simple production process flow, product appearance and performance close to those of traditional textile products, good dyeability and the like.
The non-woven fabric comprises long-fiber non-woven fabric and short-fiber non-woven fabric, and compared with the long-fiber non-woven fabric, the short-fiber non-woven fabric is good in softness, water absorption and comfort. At present, filament nonwoven fabrics are mostly prepared by a spunbond method, in which after a polymer is extruded and stretched to form filaments, the filaments are laid into a web, and the web is subjected to self-bonding, thermal bonding, chemical bonding or mechanical reinforcement to turn the web into a nonwoven fabric. The non-woven fabric prepared from the short fibers is formed by opening and carding short fibers into a net and then reinforcing the short fibers by adopting a needling, spunlacing or thermal bonding method, and the used short fibers are often short fibers with certain strength obtained by cutting filaments or the short fibers are blended with other fibers.
The cellulose fiber is a regenerated natural fiber with wide application, and has the characteristics of excellent hygroscopicity, air permeability, no static electricity generation, good dyeability and the like. Because the regenerated cellulose fiber staple fibers prepared by wet spinning have low tensile strength and are easy to disperse by a spunlace method and cannot be formed, the conventional spunlace nonwoven fabric of the regenerated cellulose fiber staple fibers is mainly prepared by cutting the filaments of the regenerated cellulose fibers into staple fibers, carding and lapping the staple fibers or carding and lapping the staple fibers with other fibers, and then reinforcing the fiber web by spunlace. The current methods for producing cellulose long fibers mainly include a viscose method, a cuprammonium method, a cellulose carbamate method, a new solvent method and the like. The cuprammonium process and the cellulose carbamate process are less used in practical production. The viscose process and the new solvent process represented by Lyocel1 fiber are more production processes applied. The Lyocell fiber is prepared by directly performing wet spinning after dissolving cellulose in a solvent NMMO, and has little pollution to the environment, but the NMMO is expensive, the spinning temperature is high, and the requirement of NMMO recovery on equipment is high. The viscose method is to treat natural fibers with caustic soda and carbon disulfide to obtain orange-yellow sodium xanthate, then dissolve the sodium xanthate in a dilute sodium hydroxide solution to form a viscous spinning stock solution, and obtain the cellulose fibers after wet spinning. Although toxic carbon disulfide is used in the production process, and three wastes (waste gas, waste water and waste residue) need to be treated, the method is still one of the main production and processing modes of the cellulose fiber at present. On one hand, the problems of pollution, high cost and the like exist in the preparation of the fiber filament by the wet spinning; on the other hand, if the fiber filaments are cut into short fibers after wet spinning and then carded with other fibers to form a non-woven fabric, the production cost of the non-woven fabric is greatly increased, and the complexity of the process is increased. At present, no wet spinning process for preparing raw cellulose staple fibers and directly using the raw cellulose staple fibers in the preparation of spunlaced non-woven fabrics exists.
Disclosure of Invention
The technical problem solved by the invention is as follows: the production process and the production system of the regenerated cellulose fiber spun-laced non-woven fabric are provided, the regenerated cellulose fiber spun-laced non-woven fabric produced by wet spinning can be directly utilized to produce the spun-laced non-woven fabric, and the problems of complex production process, high cost and high pollution of the spun-laced non-woven fabric in the prior art are solved.
The concrete solution provided by the invention comprises the following steps:
the invention provides a production process of regenerated cellulose fiber short fiber spunlace non-woven fabric, which comprises the following steps:
(1) Preparing a natural cellulose solution: dissolving natural cellulose in a solvent to obtain a natural cellulose solution, wherein the solvent comprises the following components in percentage by mass: 4-12 wt% of sodium hydroxide, 3-8 wt% of urea, 3-6 wt% of thiourea and 5-9 wt% of PEG, and the balance of water;
(2) Preparing short fibers: performing wet spinning on a natural cellulose solution to obtain regenerated cellulose fiber short fibers, wherein the coagulating liquid in the wet spinning comprises the following components in percentage by mass: caCl 2 5-8 wt%, HCl 2-3 wt%, chitosan 1-2 wt%, and the balance of water; the spinning pressure in the wet spinning is 3-8 MPa, and the aperture of the jet orifice is 0.05-0.1 mm;
(3) Preparing short fiber non-woven fabric: and (3) carrying out silk taking, leaching, drying and dewatering on the regenerated cellulose fiber staple fibers, and then carrying out a spunlace non-woven fabric process to obtain the staple fiber non-woven fabric.
On the basis of the technical scheme, the invention can be further improved as follows:
further, the natural cellulose is selected from one or a mixture of several of straw powder, wood powder and bagasse.
Further, the dissolving temperature of the natural cellulose in the solvent is-15 to 3 ℃, and the dissolving time is 15 to 60min.
Further, the PEG is selected from one or a mixture of more of PEG-200, PEG-300, PEG-400, PEG-500 or PEG-600.
Further, after the natural cellulose is dissolved in the solvent, filtering the solution by using a vibrating screen of 800-2000 meshes to remove residues to obtain the natural cellulose solution, and repeatedly pouring the residues into the solvent for dissolving and utilization for 2-3 times.
Further, the temperature for drying and removing water is 85-105 ℃.
The invention also provides a production system for producing the spunlace non-woven fabric by the continuous method of the regenerated cellulose fibers, which comprises natural cellulose dissolving equipment, wet spinning equipment, fiber taking equipment, water washing equipment, drying equipment, a conveying system and spunlace non-woven fabric equipment, wherein the wet spinning equipment comprises a solidification tank for containing solidification liquid and a jet spinning device connected with the natural cellulose dissolving equipment, and a spinning nozzle of the jet spinning device is positioned in the solidification tank; the silk taking device comprises a conveying net curtain for receiving and conveying the solidified and precipitated regenerated cellulose fiber short fibers, a plurality of conveying rollers and a plurality of traction rollers arranged in a solidification pool, wherein the conveying rollers are respectively arranged at the input end and the output end of the conveying net curtain; the washing equipment and the drying equipment are positioned at the outlet end of the conveying net curtain and are sequentially arranged along the conveying direction of the conveying net curtain; and two ends of the conveying system are respectively connected with the output end of the conveying net curtain and the feed end of the spunlace non-woven fabric equipment.
Furthermore, get silk equipment still includes anticorrosive supporting platform, anticorrosive supporting platform set up in it is inside to solidify the pond, be used for supporting carry the net curtain.
Furthermore, the wet spinning equipment also comprises a filter communicated with the liquid outlet of the natural cellulose dissolving equipment and a liquid inlet pipe connected with the filter, and the liquid outlet of the liquid inlet pipe is connected with the spinneret.
Based on the technical scheme of the invention, the method has the following technical effects:
(1) The regenerated cellulose fiber staple fibers prepared by wet spinning have the problem of difficult drawing into filaments, so that the related technology of preparing non-woven fabrics by directly utilizing the regenerated cellulose fiber staple fibers does not exist in the prior art, and the staple fibers with certain strength are obtained based on the dissolving system, the solidifying system and the wet spinning process, and can be directly used for preparing the non-woven fabrics. The invention develops an efficient green environment-friendly cellulose fiber production process and system, realizes the continuous production of regenerated cellulose fiber short fiber wet spinning and short fiber spunlace non-woven fabrics, can reduce the harm of production to the environment and the requirement on energy to the greatest extent, improves the production efficiency, reduces the production cost, and makes important contribution to the sustainable development of the fiber industry.
(2) The used raw materials are straw powder, wood powder, bagasse and the like rich in natural cellulose, and the raw materials are wide in source, environment-friendly, low-carbon and low in price.
(3) The coagulation liquid has high coagulation efficiency, the linear macromolecules of chitosan are entangled with the cellulose macromolecular polysaccharide chains, the hydrophobic effect of the cellulose macromolecular polysaccharide molecules is enhanced by the action between the hydrogen bonds and the van der Waals force between the macromolecules and the cellulose molecules, the precipitation and coagulation of cellulose are facilitated, the coagulation efficiency of the coagulation liquid can be obviously improved by a small amount of chitosan, the coagulation of natural cellulose filaments is promoted to form filaments, and a part of chitosan enters the fiber staple fibers as fiber components and is entangled with the cellulose macromolecular polysaccharide chains, so that the density and regularity of the cellulose staple fibers are enhanced, the staple fibers have higher tensile strength, and the chitosan has good antibacterial performance, so that the finally prepared non-woven fabric has good antibacterial performance and lasting antibacterial performance.
(4) The structure and performance of the regenerated cellulose fibers are dependent on the chemical composition of a coagulant and the coagulation conditions in the coagulation regeneration process, and are related to the mutual diffusion behavior of the coagulant and a solvent in the cellulose solution, and the specific coagulation mechanism is as follows: the two-phase separation of the rich and lean phases in the cellulose solution results in the precipitation and regeneration of the cellulose rich phase from the solution; in addition, when the cellulose solution is squeezed into the coagulation liquid, the applied shear stress and the jet stretch have an effect on fiber properties such as modulus of elasticity, tensile strength, elongation at break, crystallinity and degree of orientation of the final fiber. The dissolving system, the solidification condition and the wet spinning process based on the invention can realize rapid dissolution of cellulose and high-efficiency regeneration of regenerated cellulose fiber short fibers, and the wet spun short fibers obtained by solidification have regular round sections, compact fibrous structures and better mechanical properties.
(5) The staple fiber non-woven fabric prepared by the process and the system has smooth, soft, comfortable, antibacterial, toughness and excellent tensile property, and can be widely applied to the industries of medical and health products, textiles, clothes, nursing and the like
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flow chart of a production process of a regenerated cellulose fiber short-fiber spunlace nonwoven fabric based on the invention.
Fig. 2 is a schematic structural diagram of a production system of a regenerated cellulose fiber short-fiber spunlace nonwoven fabric based on the invention.
In fig. 1-2, the component names represented by the respective reference numerals are as follows:
1. natural cellulose dissolving equipment; 11. a dissolving kettle; 12. a liquid storage barrel;
2. wet spinning equipment; 21. a solidification tank; 22. a jet spinning device; 23. an anti-corrosion support platform; 24. a filter; 25. a liquid inlet pipe;
3. a filament taking device; 31. conveying the net curtain; 32. a conveying roller; 33. a traction roller;
4. water washing equipment;
5. a drying device;
6. a delivery system;
7. a spunlace nonwoven device.
Detailed Description
The following detailed description of the embodiments of the invention, which is intended to be illustrative and not to be construed as limiting the invention.
The invention will now be described with reference to the accompanying figures 1-2 and examples.
As shown in fig. 1, the process for producing the regenerated cellulose fiber spun-laced nonwoven fabric based on the invention comprises the following steps:
(1) Preparing a natural cellulose solution: dissolving natural cellulose in a solvent to obtain a natural cellulose solution, wherein the solvent comprises the following components in percentage by mass: 4-12 wt% of sodium hydroxide, 3-8 wt% of urea, 3-6 wt% of thiourea and 5-9 wt% of PEG, and the balance of water;
(2) Preparing short fibers: performing wet spinning on a natural cellulose solution to obtain regenerated cellulose fiber short fibers, wherein the coagulating liquid in the wet spinning comprises the following components in percentage by mass: caCl 2 5-8 wt%, HCl 2-3 wt%, chitosan 1-2 wt%, and the balance of water; the spinning pressure in the wet spinning is 3-8 MPa, and the aperture of the jet holes is 0.05E0.1mm；
(3) Preparing short fiber non-woven fabric: and (3) carrying out silk taking, leaching, drying and dewatering on the regenerated cellulose fiber staple fibers, and then carrying out a spunlace non-woven fabric process to obtain the staple fiber non-woven fabric.
The dissolving system, the solidifying system and the wet spinning process based on the invention obtain the short fiber with certain strength, the short fiber can be directly used for preparing non-woven fabrics, the continuous production of the regenerated cellulose fiber short fiber wet spinning and the short fiber spunlace non-woven fabrics is realized, the harm of production to the environment and the requirement on energy can be reduced to the greatest extent, the production efficiency is improved, the production cost is reduced, and the invention makes important contribution to the sustainable development of the fiber industry.
According to the production process of the regenerated cellulose fiber short-fiber spunlace non-woven fabric, disclosed by the embodiment of the invention, the natural cellulose is selected from one or a mixture of straw powder, wood powder and bagasse. The used raw materials are straw powder, wood powder, bagasse and the like rich in natural cellulose, and the raw materials are wide in source, environment-friendly, low in carbon and low in price.
According to the production process of the regenerated cellulose fiber short-fiber spunlace non-woven fabric, disclosed by the embodiment of the invention, the dissolving temperature of the natural cellulose in a solvent is-15-3 ℃, and the dissolving time is 15-60 min.
The production process of the regenerated cellulose fiber short-staple spunlace nonwoven fabric based on the embodiment of the invention is characterized in that the PEG is selected from one or a mixture of more of PEG-200, PEG-300, PEG-400, PEG-500 or PEG-600. The composite solvent system can dissolve cellulose with larger molecular weight, endows the stability of the solution, the polyethylene glycol is easy to form hydrogen bonds with the cellulose and water, and the polyethylene glycol is compounded with sodium hydroxide, urea and thiourea for application to generate a synergistic effect, so that the capacity of the solvent system for dissolving the cellulose is enhanced, and particularly the stability of the cellulose solution is improved.
According to the production process of the regenerated cellulose fiber short fiber spunlace non-woven fabric, natural cellulose is dissolved in the solvent, then the natural cellulose is filtered by using a vibrating screen of 800-2000 meshes to remove residues, so that a natural cellulose solution is obtained, the residues are repeatedly poured into the solvent for dissolving and utilizing, and the residues are recycled for 2-3 times.
According to the production process of the regenerated cellulose fiber short-fiber spunlace nonwoven fabric disclosed by the embodiment of the invention, the temperature for drying and removing water is 85-105 ℃.
The production process of the regenerated cellulose fiber short fiber spunlace non-woven fabric based on the embodiment of the invention comprises an opening process, a carding process, a lapping process, a spunlace process, a drying process, a winding process and a slitting process.
As shown in fig. 2, the invention also provides a production system for producing spunlace nonwoven fabric by a continuous method of regenerated cellulose fiber, comprising a natural cellulose dissolving device 1, a wet spinning device 2, a fiber taking device 3, a water washing device 4, a drying device 5, a conveying system 6 and a spunlace nonwoven fabric device 7, wherein the wet spinning device 2 comprises a solidification tank 21 for containing solidification liquid and a jet spinning device 22 connected with the natural cellulose dissolving device, and a spinneret of the jet spinning device 22 is positioned in the solidification tank 21; the silk taking device 3 comprises a conveying net curtain 31 for receiving and conveying the solidified and precipitated regenerated cellulose fiber short fibers, a plurality of conveying rollers 32 and a plurality of traction rollers 33 arranged in a solidification pool, wherein the conveying rollers 32 are respectively arranged at the input end and the output end of the conveying net curtain 31; the water washing device 4 and the drying device 5 are positioned at the outlet end of the conveying net curtain 31 and are sequentially arranged along the conveying direction of the conveying net curtain 31; the two ends of the conveying system 6 are respectively connected with the output end of the conveying net curtain 31 and the feed end of the spunlace non-woven fabric device 7.
Further, get silk equipment 2 and still include anticorrosive supporting platform 23, anticorrosive supporting platform 23 set up in it is inside to solidify pond 21, be used for supporting carry the net curtain 31.
The anti-corrosion supporting platform 23 plays a role of supporting the conveying net curtain with the filter net structure, and the curtain surface of the conveying net curtain can be flatly attached to the anti-corrosion supporting platform, so that the short fiber filaments are uniformly and flatly laid on the conveying net curtain; the high-pressure sprayed and solidified fiber yarns are adhered to each other by a spinning nozzle and are flatly paved on a conveying net curtain to form a short fiber screen, then the conveying net curtain paved with the fiber yarns is washed and reinforced under the traction drive of a conveying roller and a traction roller, the short fiber screen convenient to separate is formed by drying, and the short fiber screen is separated from the conveying net curtain at the output end of the conveying net curtain and enters a conveying system.
Preferably, the width of the curtain surface of the conveying net curtain is the same as that of the solidification pool and that of the anti-corrosion supporting platform, so that the fiber yarns are effectively prevented from being remained in the solidification pool.
Specifically, the length direction of the solidification tank is arranged along the conveying direction of the conveying net curtain.
Preferably, the curtain surface of the conveying net curtain is a nylon net or a polypropylene net.
Preferably, the mesh number of the conveying net curtain is 800-2000 meshes.
Further, the wet spinning equipment further comprises a filter 24 communicated with a liquid outlet of the natural cellulose dissolving equipment and a liquid inlet pipe 25 connected with the filter, wherein a liquid outlet of the liquid inlet pipe is connected with the spinneret.
Specifically, the natural cellulose dissolving device comprises a dissolving kettle 11 and a liquid storage barrel 12, and a liquid outlet of the liquid storage barrel is communicated with the filter 24.
Preferably, the drying device is a forced air dryer.
Preferably, the water washing device is a leaching device.
Specifically, the spunlace non-woven fabric equipment comprises an opener, a carding machine, a cross lapping machine, a tractor, a spraying box, spunlace equipment, a coiling machine, a splitting machine and a water treatment circulating system.
Specifically, water thorn non-woven fabrics equipment can select single face or two-sided, carries out single or many times spunlace, and water thorn non-woven fabrics equipment can adopt the reinforced traditional equipment of present non-woven fabrics water thorn, and this equipment is prior art, and it is not repeated here much, and the width size reasonable selection that the quantity of water thorn head can lay according to specific alternately lapping machine.
Preferably, the production system also comprises a water collecting device positioned below the output end of the conveying net curtain and used for receiving water flowing out of the water washing equipment and used after being washed, and the water collecting device is connected with the water treatment circulating system, so that the water is saved, and the production system is environment-friendly and energy-saving.
Preferably, the conveying system 7 is a conveying belt for receiving the regenerated fiber staple fibers conveyed from the outlet end of the conveying net curtain and conveying the regenerated fiber staple fibers to an opener in the spunlace process equipment.
Example 1
The production process of the regenerated cellulose fiber short fiber spunlace non-woven fabric comprises the following steps:
(1) Regenerated cellulose fiber staple fiber: dissolving 15% straw powder, 15% wood powder, 20% bagasse and 50% natural cellulose powder in a mixed aqueous solution of 10wt% sodium hydroxide, 6wt% urea, 5wt% thiourea and 7wt% PEG-300, dissolving at 5 deg.C with high speed stirring for 30min, spraying the solution from a spinneret of a jet spinning device into 7wt% CaCl 2 2wt% of HCl and 1wt% of chitosan, the spray pressure was 7MPa, and the pore diameter was 0.08mm.
(2) And taking out the silk screen by the silk taking device, leaching the silk screen by the leaching device, and drying and dewatering in a 95 ℃ blast drier.
(3) The method comprises the steps of opening, carding, lapping, spunlacing and drying. In the carding process, raw material fibers enter a vibration air pressure cotton box for feeding and then enter a high-speed random carding machine through a conveyor belt, the fibers are loosened uniformly in the carding process, a stripping roller is 130m/min, the fibers are quantitatively and uniformly spread on an outlet transmission belt of the carding machine according to the rotation speed of 550m/min to form a natural cellulose cotton net, the width of the carding machine is 3000 mm, and the weight of a feeding material is 70g/m 2 The ratio of the longitudinal and transverse strength is 5: 1; in the lapping process, the natural cellulose cotton net is crossed and lapped by a holding type cross lapping machine, and then the fiber net is drawn to 50g/m by a multi-roller drawing machine with the drawing multiple of 5 times 2 Then the natural cellulose cotton net is clamped between two metal net supporting curtains, and is turned into a vertical and horizontal direction through a chain-shaped conveying device and a honeycomb roller, and then is conveyedTransporting to a spray box, pre-wetting the spray sprayed by the spray box, and entering a first spunlace region to complete a pre-spunlace process; in the spunlace process, two spunlaces are carried out step by step, the aperture of a water needle plate is 0.016mm, and the spunlace pressure of a spunlace head in the first spunlace is set to be 55bar; the water jet pressure of the water jet head in the second water jet is set to be 80bar, and the lower ends of two water jet areas in the water jet process are both connected with a water filtering circulation system;
(4) And performing a coiling process and a slitting process. Drying the natural cellulose non-woven fabric at 95 ℃, rolling and cutting to obtain the finished product of the short fiber non-woven fabric.
Example 2
(1) Dissolving 15% straw powder, 15% wood powder, 20% bagasse and 50% natural cellulose powder in a mixed aqueous solution of 10wt% sodium hydroxide, 6wt% urea, 5wt% thiourea and 7% PEG-200, dissolving at-15 deg.C with high speed stirring for 15min, spraying the solution into 5wt% CaCl from a spinneret of a jet spinning device 2 2wt% of HCl and 1wt% of chitosan, the spray pressure was 5MPa, the pore diameter was 0.05mm, and the frequency was 0.5Hz.
Steps (2) to (6) were the same as in example 1.
Example 3
Dissolving 15% straw powder, 15% wood powder, 20% bagasse and 50% natural cellulose powder in a mixed aqueous solution of 10wt% sodium hydroxide, 6wt% urea, 5wt% thiourea and 7wt% PEG-500, stirring at high speed at 3 deg.C for 60min, spraying the solution from a spinneret of a jet spinning device into 8wt% CaCl 2 3wt% of HCl and 2wt% of a chitosan mixed aqueous solution, the spray pressure was 8MPa, and the pore diameter was 0.1mm.
Steps (2) to (6) were the same as in example 1.
Comparative example 1:
the difference from example 1 is that the coagulation solution does not contain chitosan.
Comparative example 2:
the difference from example 1 is that the injection pressure was 0.05MPa.
Comparative example 3:
the difference from example 1 is that the injection pressure was 0.5MPa.
Comparative example 4:
the difference from example 1 is that the injection pressure was 2MPa.
The performance test was performed on the spunlace nonwoven fabrics prepared in examples 1 to 4 and comparative examples 1 to 4, and the results are shown in table 1 below.
TABLE 1 Performance test Table for nonwoven fabrics
Figure BDA0003233994070000121
The spunlace non-woven fabric product prepared based on the embodiment of the invention has smooth, soft and comfortable surface, excellent toughness and tensile property, meets the performance standard of non-woven fabrics, has good and lasting antibacterial property, and can be widely used in the industries of hygienic products, textiles, clothing, nursing and the like.
Although embodiments of the present invention have been described in detail above, those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A production process of regenerated cellulose fiber short fiber spunlace non-woven fabric is characterized by comprising the following steps: the method comprises the following steps:
(1) Preparing a natural cellulose solution: dissolving natural cellulose in a solvent to obtain a natural cellulose solution, wherein the solvent comprises the following components in percentage by mass: 4-12 wt% of sodium hydroxide, 3-8 wt% of urea, 3-6 wt% of thiourea and 5-9 wt% of PEG, and the balance of water; the dissolving temperature of the natural cellulose in the solvent is-15 to 3 ℃;
(2) Preparing short fibers: performing wet spinning on a natural cellulose solution to obtain regenerated cellulose fiber short fibers, wherein the coagulating liquid in the wet spinning comprises the following components in percentage by mass: caCl 2 5-8 wt%, HCl 2-3 wt%, chitosan 1-2 wt%, and the balance of water; the wet methodThe spinning pressure in the spinning is 3-8 MPa, and the aperture of the jet orifice is 0.05-0.1 mm;
(3) Preparing short fiber non-woven fabric: and (3) carrying out silk taking, leaching, drying and dewatering on the regenerated cellulose fiber staple fibers, and then carrying out a spunlace non-woven fabric process to obtain the staple fiber non-woven fabric.
2. The process for producing regenerated cellulose fiber short-fiber spunlace nonwoven fabric according to claim 1, wherein the natural cellulose is selected from one or a mixture of straw powder, wood powder and bagasse.
3. The process for producing a regenerated cellulose fiber short cellulose spunlace nonwoven fabric according to claim 1, wherein the dissolving time is 15 to 60min.
4. The process for producing regenerated cellulose fiber short cellulose spunlace nonwoven fabric according to claim 1, wherein the PEG is selected from one or a mixture of PEG-200, PEG-300, PEG-400, PEG-500 or PEG-600.
5. The process for producing a regenerated cellulose fiber short cellulose spunlace nonwoven fabric according to claim 1, wherein the natural cellulose is dissolved in the solvent, then the natural cellulose solution is obtained by filtering and removing residues through a vibrating screen with 800-2000 meshes, and the residues are repeatedly poured into the solvent for dissolving and recycling for 2-3 times.
6. The process for producing a regenerated cellulose fiber spun-laced nonwoven fabric as claimed in claim 1, wherein the temperature for drying and removing water is 85-105 ℃.
7. The process for producing a regenerated cellulose fiber short fiber spunlace nonwoven fabric according to claim 1, wherein the spunlace nonwoven fabric process comprises an opening process, a carding process, a lapping process, a spunlace process, a drying process, a winding process and a slitting process.
8. The production system of the regenerated cellulose fiber short-fiber spunlace nonwoven fabric applied to the production process of claim 1, which is characterized by comprising a natural cellulose dissolving device, a wet spinning device, a fiber taking device, a water washing device, a drying device, a conveying system and a spunlace nonwoven fabric device, wherein the wet spinning device comprises a solidification tank for containing solidification liquid and a jet spinning device connected with the natural cellulose dissolving device, and a spinneret of the jet spinning device is positioned in the solidification tank; the silk taking device comprises a conveying net curtain for receiving and conveying the solidified and precipitated regenerated cellulose fiber short fibers, a plurality of conveying rollers and a plurality of traction rollers arranged in a solidification pool, wherein the conveying rollers are respectively arranged at the input end and the output end of the conveying net curtain; the washing equipment and the drying equipment are positioned at the outlet end of the conveying net curtain and are sequentially arranged along the conveying direction of the conveying net curtain; and two ends of the conveying system are respectively connected with the output end of the conveying net curtain and the feed end of the spunlace non-woven fabric equipment.
9. A system for the continuous production of hydroentangled nonwoven fabrics from regenerated cellulose fibers according to claim 8, characterized in that the taking device further comprises an anti-corrosion support platform arranged inside the coagulation basin for supporting the transport web.
10. A system for the continuous production of hydroentangled nonwoven fabrics according to regenerated cellulose fibres, as claimed in claim 8, characterized in that said wet spinning device further comprises a filter communicating with the outlet of said natural cellulose dissolution device and a liquid inlet pipe connected to said filter, the outlet of said liquid inlet pipe being connected to said spinneret.
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