CN101023211A - A process for preparing a non-woven cellulosic structure and the non-woven cellulosic structure prepared therefrom - Google Patents
A process for preparing a non-woven cellulosic structure and the non-woven cellulosic structure prepared therefrom Download PDFInfo
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- CN101023211A CN101023211A CNA2005800311048A CN200580031104A CN101023211A CN 101023211 A CN101023211 A CN 101023211A CN A2005800311048 A CNA2005800311048 A CN A2005800311048A CN 200580031104 A CN200580031104 A CN 200580031104A CN 101023211 A CN101023211 A CN 101023211A
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/015—Natural yarns or filaments
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- 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
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
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- 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
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/013—Regenerated cellulose series
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to a method for preparing nonwoven cellulose structure, including step: extruding continuous filament from cellulose solution; fine-drawing the extruded filament by regenerated liquid; laying the filament to web; producing the nonwoven cellulose.
Description
Related application
The application requires in the priority of the India application No.999/MUM/2004 of submission on September 17th, 2004.
Technical field
The present invention relates to a kind of method and nonwoven cellulosic structure prepared by this method for preparing nonwoven cellulosic structure (non-woven cellulosicstructure).Especially, the present invention relates to the complex nonwoven cellulosic structure many/individual layer, absorbefacient, durable or tractable that (consolidated) solidified in a kind of preparation, comprise that having one deck at least is to be made by biodegradable, continuous cellulosic material.
More especially, the present invention relates to method and the prepared by this method complex nonwoven cellulosic structure of a kind of preparation by the nonwoven cellulosic structure of (randomized) continuous, randomization cellulose fibre formation.
Background technology
The non-woven structure that solidifies comprises: viscose (Viscose Fibers), Lyocell fiber, acetate fiber (Cellulose acetate), and/or the mixture (blends) of they and synthetic fiber.The Lyocell fiber is based on the artificial fibre that non-derivation cellulose directly is dissolved in organic solvent.The Lyocell fiber is produced by regenerated celulose fibre from the solution of cellulosic organic solvent such as N-methylmorpholine-N-oxide.
The manufacture method of cellulose fibre is known in the prior art.It is the method that raw material is made viscose with the wood pulp that United States Patent (USP) 3600379 discloses a kind of.It is with sheet or pulpous state and 17-22%NaOH solution soaking.Excessive soak is removed by extruding.Alkali cellulose is through pulverizing and aging, and aging alkali cellulose is with a certain amount of carbon disulfide xanthogenation.Xanthates (xanthate) is dissolved in and forms viscose solution (Viscose solution) in the NaOH solution.Viscose glue filters through one or many after the slaking or in the maturing process through slaking.Then, viscose solution is spun cellulosic filaments (filaments)/fiber (the fibers)/crude fibre (tow) that forms regeneration from pore in acid spinning bath.Viscose glue/artificial (Rayon) spinning is that nearly 100 years historical technology are arranged, and therefore only does brief description.Similarly, it is also known to prepare the method for non-derivative fibre cellulose solution with solution spinning.
Mention a kind of preparation among the indian patent No.189773 and be used to spin fiber/the spin method of the cellulose solution of film.This method comprises cellulosic material introduced in the aqueous solution of tertiary amino oxides (tertiary amine oxide) and is prepared into turbid liquid.Then, turbid liquid heats through High shear device under the pressure that weakens.
United States Patent (USP) 4,144,080 and 4,246,221 have disclosed a kind of method by compacted (extrudingground) tertiary amino oxides solution and preparation of cellulose amine oxide solution (amine oxide solution).Disclosed a kind of method for preparing fiber simultaneously, in air, solution has been carried out spinning by pore, by mechanical stretching that it is directed and by making spun long filament pass through the non-solvent bath that fiber is born again from solution.
In a single day form long filament by viscose process or other any methods, crude fibre is cleaned and fiber is cut into staple fibre.Usually, staple fibre needs through super-dry and packing (if prepare in different places nonwoven).The dry staple fibre of crossing is formed fiber mat (mat) by shredding, mixing (if desired) and combing.Direct or the non-woven material of process cross lapping (cross lapping) the bonding formation in back of this pad.
United States Patent (USP) 3,833 has explained in 438 and 3,906,130 methods of enumerating that the continuous copper amine fiber (cupramonium rayon) of a kind of usefulness, viscose (viscose rayon) and like fibrous long filament prepare the method for the textiles of non-woven and porous.In the method, at first continuous long filament is laid down on the conveyer, and it can cause in the direction of forward movement swaying.Equality and sinusoidal motion separately made in the spinning unit.Then, spray by water and realize solidifying (consolidation).Copper amine fiber is a kind of absorbent cellulosic nonwoven of expensive methods preparation.This method comprises mechanical moving element such as cam/crank mechanical device, and this is easy to carry out breakdown maintenance/maintenance.Limited swing speed (rev/min) limited the long filament charging rate, also limited speed of production thus.
United States Patent (USP) 3,620,903 and 4,069,563 disclosed a kind of by with thin, be the method that the method for one or more column liquid miscarriages of under high pressure ejecting from its hole is handled the supatex fabric of fibre sheet material lightweight in next life, non-patterning in essence.One deck fiber web is supported on the surface and with liquid and flows together reciprocating motion, just makes fiber that the mode entangled fiber of intensity height, good stability is provided with a kind of without adhesive.
Above-mentioned patent has been described the whole bag of tricks, and wherein cellulose solution utilizes the solution spinning spinning.Cellulose fibre spins and cuts into staple fibre.Subsequently, their waters and/or other chemical reagent are handled.These wet fibers are through super-dry then.For processing a kind of nonwoven products, pad utilizes opener (opener) to be stung into net (hydro entangled) through water then by shredding, combing (carded) and obtains a kind of spunlaced (spun laced) product.Described product obtains the cellulose nonwoven fiber through drying again.This is the method for tradition and generally accepted manufacturing cellulose nonwoven fiber.Yet, relate to dry described fiber twice in this method, thereby increased cost.And, because described non woven fibre is made up of staple fibre, so the intensity of this kind fiber is not high.
Summary of the invention
The invention discloses the method for a kind of manufacturing continuous cellulose long filament (filaments), this method can be eliminated above-mentioned shortcoming.
The present invention relates to a kind of method for preparing the nonwoven cellulosic structure, comprise step: from cellulose solution, extrude long filament; The long filament of extruding makes the long filament drawing-down through regenerated liquid (regenerating liquid) just in action; The long filament of drawing-down is laid to net, has just prepared the nonwoven cellulosic structure thus.
Description of drawings
The present invention will be described in detail with reference to Figure of description, and wherein same numbers is represented identical part, wherein:
Fig. 1 is the axonometric drawing (isometric view) such as grade of non woven fibre cellulosic material filament spinning component.
Fig. 2 is the exploded isometric view (exploded isometric view) of manifold.
Fig. 3 be parallel silk laying apparatus etc. axle attempt.
Fig. 4 (a) is the different schemes of preparation composite construction to 4 (e).
The specific embodiment
With reference to figure 1 and Fig. 2, cellulose solution injects spinning pack (7), preferably a kind of rectangular module under the temperature of needs and constant flow velocity.Manifold (3) be positioned over the rectangle spinning pack below.Manifold (3) is used for the drawing-down long filament, and random lay long filament, therefore keeps the rectangle of net.Regenerated liquid injects with regenerated liquid ascending pipe (4).The regenerated liquid ascending pipe can be inserted from the top or the bottom of manifold.Manifold (3) keeps rectilinear structure to form by form funnel shaped side plate and other parts under certain-length.This funnel allows regenerated liquid from the overhead stream to the bottom.Can have perforation on the top side plate of funnel (5), so when regenerated liquid was filled with manifold (3), liquid just flowed out and the funnel of flowing through from perforation.To keeping constant liquid level, because acceleration of gravity, spin that water-column makes liquid at full speed flow out funnel (5) in the case from the Flow-rate adjustment of regenerated liquid ascending pipe (4).High flow rate applies pulling force and makes its drawing-down the long filament that injects from spinning pack.Stretched long filament drops on the collecting belt transporter (8) by the energy that liquid stream obtains.Compare with the speed that long filament falls, because the translational speed of collecting belt (8) is slower, long filament arbitrarily is layered on and forms the nonwoven web that tangles fully on the conveyer belt.Whole transporter is placed in the regenerated liquid feeder (9).Regenerated liquid flows out feeder and enters recovery part and circulation member under the gravity effect.Under the effect of vacuum system (10), realize lapping, vacuum system be placed in collecting belt below, be positioned at the long filament outlet under.Vacuum system makes the disordered orientation when long filament keeps it on tape, thereby reduces the influence of water active force.
Fig. 3 is a kind of preferred laying scheme.The curtain (curtain) (11) that utilizes aforesaid method to form enters material feeding box (feeding box) (12), and material feeding box can have mechanically operated pair of roller arrangement, and pulling equipment spurs this curtain and charging downwards.Material feeding box (12) is realized gyration by rocking equipment (swingarrangement), and described curtain is laid on the collecting belt (14) of motion with folding (13) form.According to required coverage rate, the speed of the speed of swing, the speed of whereabouts and conveyer belt transporter can be adjusted.Same, one or more material feeding box (12) with collecting belt (14) but cooperation so just obtained as the network structure of spreading out with cross lapping machine.Compare with the fibroreticulate transverse tensile strength of making shown in Figure 3, the fiber web that put the intersection shop has higher coverage rate, better horizontal (CD) tensile strength.
Fig. 4 (a) is the typical uncured layer shop fiber mat that a kind of viscose glue continuous filament yarn (1) that utilizes fluid to assist random generator randomization is made.Fig. 4 (b) is a kind of typical uncured layer shop fiber mat made from the Lyocell continuous filament yarn (2) of the auxiliary random generator randomization of liquid.More than two kinds of structures can be with the known method curing of describing.Fig. 4 (c) is a kind of representative schematic diagram with the nonwoven composite structure before the curing of method for preparing.In this case, bottom is cellulose nonwoven viscose or Lyocell fiber or with analog (1) or (2) of method for preparing, and top layer can be cellulose nonwoven net or synthetic nonwoven web (x).This structure can solidify to form the structure of curing with above-mentioned known method.Fig. 4 (d) is a kind of representative diagrammatic sketch with the nonwoven composite structure before the curing of method for preparing.In this case, bottom can be cellulose nonwoven net or synthetic nonwoven net (x), and top layer is cellulose nonwoven viscose or Lyocell fiber or with analog (1) or (2) of method for preparing.This structure can be solidified with known method.Fig. 4 (e) has provided a kind of multi-layer fiber element or synthetic nonwoven fiber, and (wherein having one deck at least is cellulose nonwoven viscose or Lyocell fiber or by the similar layer (1) or (2) of method for preparing for x1, composite construction x2...).Whether the existence of layer (1) or layer (2) decides according to the estimated performance of this composite construction.This structure can be cured with known method again.
Solvent spinning method (Lyocell):
Being used to make the preferred pulp of solution is the soft wood pulp with high Alpha (alpha) content of cellulose (89-93%) and low hemicellulose level.The degree of polymerization DP of pulp (Degree ofPolymerization) is in the scope of 600-1100, and preferable range is 700 to 1000.But the cellulose concentration of making the solution of spinning can be in the scope of 5%-28%, preferred 7%-20%, and optimum cellulose concentration value is between 10% to 15%.Getable NMMO on the market (N-methylmorpholine-N-oxide) concentration is 50%, needs with traditional distillating method pre-concentration to 77% before the dissolving cellulos.Under about 100 ℃ of conditions, the pulp with small pieces in the twolip sigma blender of using 400mm Hg vacuum mixes with the solution of pre-concentration.After 1.5 hours, just obtained a kind of uniform solution, this solution can be cooled to solid state.Other methods that can be used for preparing cellulose solution on continuous foundation are available, as: adopt high-shear mixer, film apparatus or degassing type counter rotating twin screW extruder (devolatalizing type counterrotating twin screw extruder).The method of describing among the indian patent No.189773 also can adopt.
The spinnerets that porous is set in a length-width ratio is approximately 1.2 to 200 rectangular configuration is used to extrude long filament, and spinnerets has diameter range at 50 to 150 microns spinneret orifice, is preferably 55 to 100 microns.The length-width ratio that more than provides can provide 10 to 60 rounds.
Under 90-110 ℃ of temperature, in the Lyocell polymer spinning process, laterally providing suitable air-gap and air flow.According to the size and the draw ratio of spinnerets, be lower than 1 DENIER (denier) and can be spun to the long filament of 5 Denier.
With the long filament that the form of curtain is come out, rely on and contain their rectangular appearance of special device maintenance that regeneration is bathed.The core of case has a funnel shaped device, and funnel can be a porous from the top, and it is flat being lower than after a certain distance.Internals is arranged like this, provides slit in the bottom of funnel, and this slit also is the outlet of spun long filament as the outlet of actified solution.Funnel be sealing and and the side isolate, can not enter funnel from the regeneration liquid bottom the case like this.The inlet of regenerated liquid is located at the bottom.In the liquid filling box, liquid level raises when surpassing the straight portion of funnel, and liquid arrives the porous part of funnel.Liquid enters funnel.Liquid in the adjusting tank flows so that outlet liquid level and import match, and always keeps regenerated liquid to be full of.The speed of extruding long filament is that 8m/min is to 80m/min.
Liquid stream in narrow width has quickened from the yarn speed of spinnerets ejection.Regenerated liquid liquid is sent to the solvent recovery process.
Regenerated liquid satisfies following relationship in the speed that the manifold outlet obtains:
V
2＝2×g×h
In the formula: g-acceleration of gravity, the m/sec of unit
2
The regenerated liquid height that h-is counted from funnel bottom opening place, the m of unit
The flow velocity of V-regenerated liquid, the m/sec of unit
The flow velocity of the regenerated liquid of Liu Donging remains on 50m/min between the 250m/min, and preferred 100m/min is between the 200m/min.
Keep the required regenerated liquid flow velocity of manifold liquid level to satisfy following relationship:
Q＝L×W×V
In the formula: L-by the bottom measure funnel length, unit is m
W-funnel bottom opening, unit are m
Q-keeps the required regeneration liquid measure of liquid level, and unit is m
3/ hr
As can be seen for the spinnerets of known width, current depend primarily on two parameters from above-mentioned relation, i.e. the opening of height and funnel bottom.The test card prescribed liquid height that different funnels is implemented is high more, and flow velocity is high more, and it is also big more to be applied to drawing on the long filament (stretching) power.On the other hand, water velocity means at hopper outlet position water energy (water energy) high more more soon.The high more disturbance that is applied on the filament of the energy of water is big more.Therefore, in the time of design manifold funnel, should consider into these factors.The example of enumerating shows the shape of different funnels.
Long filament is by drawing-down when the long filament of extruding passes through mobile regenerated liquid.
The described long filament that is formed by said method is brought on the conveyer belt, and long filament on conveyer belt is randomization more because the effect of regenerated liquid stream can become.As the alternative of conveyer belt, the collection of net can be finished in vacuum drum (drum) system of rotation.Material feeding box can have a kind of mechanically operated pair of roller arrangement and draw net and make its downward conveying.Material feeding box has variable speed drive, and speed change gear is driven by the pendulous device that the stratum reticulare lay-up can be put on the collecting belt that moves.The step-less adjustment of wobble amplitude and swing speed also can be provided.According to required area coverage, the adjustable-speed of the speed of swing, the amplitude of swing, falling speed and conveyer belt so just obtains from the net of 10 to 600gsm (restraining every square metre of grams per square meter).The long filament pad can not form by the swing material feeding box yet, and wherein unique variable will be the falling speed of conveyer and curtain.
Yet another laying method is a cross lapping.This method is similar to the method shown in Fig. 3.Yet, have one or be the conveyer belt feeding more than a case in the direction of intersecting.The swing case is spread the off line lapping type lapping that obtains intersecting along conveyer belt width direction, if desired, same these swing casees also can be laid along the moving direction of conveyer belt, as shown in Figure 3, this web frame has higher coverage rate, has compared better transverse tensile strength with transverse tensile strength shown in Figure 3.Above-described laying method is useful especially when other mixed with fibers of cellulose fiber peacekeeping.When the needs composite construction, the net of one or more fibers forms sandwich construction together.Resulting net is the composite construction of other fiber of cellulose fiber peacekeeping.
Then, not bonding fiber web enters curing (consolidation) step, comprising: Hydroentangled (hydro-entanglement), chemical adhesion, acupuncture systems (needle punching system) etc., cure stage make the fiber of pad solidify the nonwoven material that generates adhering and solidifying.
After this wet non-woven jointing material does following processing: bleaching, further washing, dyeing, soft finish etc., remove redundant moisture through drying machine then.Subsequently, net is collected clot on the up-coiler.Described net is soft, intensity good, can be used for multiple different application, as: semi-durable (semi-durable) or disposable part (segment).
The rayon spinning method:
Viscose glue through suitably aging, filtration, maturation and deaeration injects spinning equipment under correct temperature.Spinneret holder can remain unchanged maybe to be needed to improve to be suitable for beam forming plate (cluster plate), and this beam forming plate has circular noble metal eye, and these are mounted the shape that is arranged in rectangle.Each is followed conventional rounded projections arranged (triangular pitch) and disposes the spinneret orifice that (configuration) is drilled with essential number.
Spinnerets is immersed in the spinning bath, and this spinning bath remains on the position that temperature required and concentrated liquid level remains on bottom down, and just spinneret orifice faces down.Unique difference between Lyocell method and the viscose process is: in the Lyocell method, air-gap remains between regenerated liquid and the spinnerets, because rayon spinning is a kind of wet spinning process, so spinnerets is immersed in the regeneration bath in viscose process.The viscose glue net has just formed like this.The cross section of cellulose fibre can change by using different spinneretss, to obtain trilobal, Y shape or other form, gives special nature to this structure.Step subsequently is identical with the solvent spinning process of last above-mentioned formation nonwoven material.For viscose process is that water stings into net/curing operation parameter possibility difference.
The behavior of understanding long filament when the long filament shop following time is necessary.Therefore consider the simulation of line.When the vertical shop of line during down to mobile being with, the mode under the shop that line is taked depends on the character ratio of tape speed (height of line density, bending rigidity and torsional rigid, feed points and the charging with) of filament.Further, in process of deployment except that long filament character important variable also have the speed of speed, the water of speed, the band of long filament, height, the vacuum under the collecting belt and the design of manifold of the manifold distance that begins to measure from band.
Setting and hardening (consolidation):
In case obtain the continuous cellulosic filaments of the random distribution of a curtain/complete, next step is exactly that this curtain long filament setting and hardening (consolidation) is become nonwoven web.In case obtain the non-woven manufacturer of continuous cellulosic filaments that a curtain distributes immediately/complete a large amount of methods availalbe (as Fig. 4 (a) to shown in 4 (e)) is arranged.Can use the layer/multilayer that melts and sprays (melt blown) or spunbond (spun bonded), spinnable thermoplastic polymer of list/bi-component fusion such as polyethylene (Polyethylene), polypropylene (polypropylene), ethylene-vinyl acetate copolymer (ethyl vinyl acetate), polyester (polyester), polyurethane (polyurethane), ethylene methacrylate (ethylene methylacrylate), nylon or analog.Select individual layer/sandwich construction according to the Performance Characteristics that final products are required.The curtain of the method manufacturing that the staple fibre pad that also can utilize the combing that is generated by the spinnable thermoplastic polymer of above-mentioned viscose process, Lyocell method or other fusions discloses with the present invention with one deck at least generates the part of non-woven structure.After all layers all were routed to the position of expectation, not bonding non-woven structure was with the several different methods setting and hardening in road known to a person skilled in the art.Glued process can comprise: water stings into net method, needle point method, heat bonding, spot bonding, melt stability method, latex or chemical adhesion method.The type of bonding/curing can decide based on desired final products/product performance.
Test:
The test program that is used for determining the characteristic of the non-woven structure of curing of the method manufacturing that discloses by the present invention and product be for the people who is proficient in non-woven field known.
Extension test:
The sample of long 200mm, wide 2.5m obtains the yield point of this structure with the speed stretching of 100mm/min in Instron (Instron) testing equipment.This numeral has been described the tensile strength values of non-woven structure when representing with value N/2.5cm.Resulting numerical value is listed in the following table 1.The distribution of orientations of fiber:
This experiment is used to measure the random distribution of non-woven structure long filament.Two exemplary graph are as follows: curve map 1 has been represented the non-woven structure that has the long filament of a greater number on a certain specific direction--the low random degree of expression, however curve map 2 shows the non-woven structure with higher random degree.We can judge the amount of the random distribution of web frame like this.
Other to understanding the requisite test of properties of product is: basic weight (Basis weight), extension at break degree (Elongation at break), TEAR STRENGTH (tear strength), net wearability test (webabrasion resistance test), water droplet absorbability test (drop absorbency test), the absorbability test, rectilinear wicking rate (vertical wicking rate), drop volume test (dripcapacity test), the test (dry lint release test) that comes off of dried Soft flocks.The testing procedure of these tests can obtain from any non-woven handbook.
For example:
It is the rectangle spinnerets in 80 microns hole that the cellulose Lyocell polymer solution of example 1:12% injects by 20 row diameters are arranged with the speed of 0.06 gram/hole/minute (grams/hole/min), the extruded velocity of generation 10m/min.The manifold that maintains the regeneration fluid column of 510mm below spinnerets is installed like this: the gap of the top water surface and spinnerets bottom is between 15-25mm.The gap of 5mm is provided in the bottom of funnel.10-15m
3It is full state that the regenerated liquid flow velocity of/hr enough keeps in the manifold.The speed of regenerated liquid remains on 190m/min.Though the water speed of funnel exit is much higher, the pulling force that is applied on the long filament makes its speed drawing-down with 40-60m/min, and therefore the draw ratio that produces is 4 to 6 (draw ratio is the speed of long filament and the ratio of extruded velocity).The distance that between collecting belt that moves with the speed of 10m/min below the manifold and manifold, keeps 120mm.The below of laying part provides the vacuum of 400mm water column.The net of Huo Deing washes and is fed to paved in multi-layers equipment (multi layering device) behind the solvent and bonds then on tape.Obtain having the nonwoven sample of different coverage rates by the different samples that change number of plies preparation.The nonwoven that is obtained has high strength, it is soft to be and absorbability is arranged.Sample test coverage rate, with gram/square metre (gsm) be unit, water imbibition, to be unit with restraining/restraining, above-mentioned tension test is carried out at machine vertical (MD, machine direction) and horizontal (CD) under dry state and hygrometric state condition.Crucial test result is listed as follows:
Table 1
| The present invention | Conventional method | |||||
| | Sample # | 1 | |
|
100% viscose staple fibre | The 60/40V/P staple fibre |
| Filament linear density (DENIER) | 1.5 | 1.2 | 2 | 1.5 | 1.51 | |
| Non-woven coverage rate (gsm) | 111.6 | 82.8 | 100 | 112.9 | 80 | |
| Axial (direction of laying) TENSILE STRENGTH (N/2.5cm) | 145.6 | 118.8 | 270.7 | 71.2 | 70.58 | |
| Water imbibition (gm/gm) | 7.4 6 | 8.32 | 4.94 | 5.58 | 7.5 |
| The bonding mode that adopts | Water stings into net | Water stings into net | Chemical bonding | Water stings into net | Water stings into net |
Example 2:11% cellulose Lyocell polymer solution with 0.01 gram/hole/minute speed to inject by 20 row diameters are arranged be the rectangle spinnerets in 80 microns hole, the extruded velocity of generation 1.72m/min.Manifold keeps the regeneration fluid column of 170mm.The gap of 4mm is provided in the bottom of funnel.7m
3It is full state that the regenerated liquid flow velocity of/hr enough keeps in the manifold.The speed of regenerated liquid remains on 109m/min.Though the water velocity of funnel exit is much higher, the pulling force that applies on the long filament makes its speed drawing-down with 8m/min, and therefore the draw ratio that produces is 4.6.Lapping speed remains on 1-3m/min to obtain a kind of uniform non-woven structure.The vacuum of 255mm water column is applied to the below of laying part.The net of Huo Deing is fed to paved in multi-layers equipment (multilayering device) after washing solvent on tape, bonds then.Obtain having the nonwoven sample of different coverage rates by the different samples that change number of plies preparation.The result who is obtained with disclose above closely similar.
The present invention also can be used for the preparation of viscose, reaches similar suitable result.
Beneficial effect of the present invention:
A) for same coverage rate, the intensity of cellulose nonwoven fabric is compared and has been improved 1.5 to 2 times with staple card spunlaced fabric (staple fiber carded spun laced fabric), than Lycell melt-spun fabric high a lot (substantially higher). This just means, inputs identical material and can obtain more high-intensity fabric, and in other words for the fabric of same intensity, less material usage just can be realized identical purpose.
B) this method does not relate to and uses the high temperature air of the costliness use in Lyocell melt jet (melt blowing) to carry out spinning. Whole process is moved under lower temperature, has therefore reduced the total power consumption of per kilogram fabric.
C) the long filament drawing-down does not need expensive pressure-air.
D) the random distribution of long filament does not need the vacuum level of inject high pressure fluid and Tai Gao.It uses the fluid of the recyclable utilization of low amount low speed.
E) from the viscose glue to the net or the Lyocell spinning solution include only a step dry (final stage behind the spunlaced one-tenth cloth (spun lacing)) to the process of net, therefore, compare with nonwoven web-combing jet net-spraying method (carded spun laced) of making of staple fibre and saved a complete drying steps.This process has also been left out fibre bundle cutting, fiber opening and combing step.
F) in case after the pad of randomization prepares, can adopt other method to solidify this net, that is: acupuncture, use adhesive etc.Do not need to use extra equipment, as cross lapping machine etc.
G) this method is only used continuous fibers, the situation that staple fibre causes grinding the defiber bits therefore can not occur, is to produce to be used for the Perfected process of wiping away paper (wipes) that toilet (clean room) uses.
Claims (according to the modification of the 19th of treaty)
1. method for preparing the nonwoven cellulosic structure comprises step:
A) from cellulose solution, extrude long filament;
B) with the regenerated liquid of the described long filament of extruding by flowing, drawing-down there is no the described long filament of regular distribution; And
C) long filament that described drawing-down be there is no regular distribution is laid to net.
2. the method for claim 1, wherein described long filament is continuous.
3. method as claimed in claim 2, wherein, described structure is uniform.
4. method as claimed in claim 3, wherein, described nonwoven cellulosic structure utilizes known method to solidify.
5. as any one described method in the claim 1 to 3, wherein, described mobile regenerated liquid and the described long filament of extruding are by the slot of 3mm to 7mm.
6. any method described in claim 5, wherein, described flowing regenerated liquid and the described long filament of extruding by the slot of 4mm to 6mm.
7. the method described in foregoing any one claim, wherein, the speed of the described regenerated liquid that is flowing is that 150m/min is to 330m/min.
8. method as claimed in claim 7, wherein, described flowing the speed of regenerated liquid be that 200m/min is to 216m/min.
9. as claim 7 or 8 described methods, wherein, described speed reaches by the gravity effect.
10. the method described in foregoing any one claim, wherein, described long filament is 1 to 5 DENIER (denier).
11. the method described in foregoing any one claim, wherein, the speed when the described long filament extruded breaks away from the described regenerated liquid that is flowing is that 8m/min is to 80m/min.
12. the method described in foregoing any one claim, wherein, the speed of the described long filament of extruding provides and is limited to 6 draw ratio.
13. the method described in foregoing any one claim, wherein, described laying realizes with the vacuum aided method.
14. method as claimed in claim 13, wherein, described vacuum aided method is finished by rotation vacuum drums system.
15. a nonwoven cellulosic structure is to be prepared by the method described in foregoing any one claim.
16. nonwoven cellulosic structure as claimed in claim 15, wherein, described non-woven structure is lyocell class, viscose glue class (viscose) or their any combination.
17. the structure of a non-woven curing comprises one deck such as claim 15 or 16 described nonwoven cellulosic structures at least.
18. one kind in fact as here with reference to present embodiment with invest the described method for preparing the nonwoven cellulosic structure of chart of this specification.
19. one kind in fact as here with reference to present embodiment with invest the described nonwoven cellulosic structure of chart of this specification.
Claims (17)
1. method for preparing the nonwoven cellulosic structure comprises step:
A) from cellulose solution, extrude long filament;
B) with the regenerated liquid of the described long filament of extruding by flowing, drawing-down there is no the described long filament of regular distribution; And
C) long filament that described drawing-down be there is no regular distribution is laid to net.
2. the method for claim 1, wherein described regenerated liquid that is flowing can make the random distribution of described long filament again.
3. method as claimed in claim 1 or 2, wherein, described long filament is continuous.
4. method as claimed in claim 3, wherein, described nonwoven cellulosic structure utilizes known method to solidify.
5. the method described in foregoing any one claim, wherein, the speed of the described regenerated liquid that is flowing is that 50m/min is to 250m/min.
6. method as claimed in claim 5, wherein, described flowing the speed of regenerated liquid be that 100m/min is to 200m/min.
7. as claim 5 or 6 described methods, wherein, described speed reaches by the gravity effect.
8. the method described in foregoing any one claim, wherein, described long filament is 1 to 5 DENIER (denier).
9. the method described in foregoing any one claim, wherein, the described long filament extruded break away from the described regenerated liquid that is flowing and the time speed be that 8m/min is to 80m/min.
10. the method described in foregoing any one claim, wherein, the speed of the described long filament of extruding provides and is limited to 6 draw ratio.
11. the method described in foregoing any one claim, wherein, described laying realizes with the vacuum aided method.
12. method as claimed in claim 11, wherein, described vacuum aided method is finished by rotation vacuum drums system.
13. a nonwoven cellulosic structure is to be prepared by the method described in foregoing any one claim.
14. nonwoven cellulosic structure as claimed in claim 15, wherein, described non-woven structure is lyocell class, viscose glue class (viscose) or their any combination.
15. the structure of a non-woven curing comprises one deck such as claim 13 or 14 described nonwoven cellulosic structures at least.
16. one kind in fact as here with reference to present embodiment with invest the described method for preparing the nonwoven cellulosic structure of chart of this specification.
17. one kind in fact as here with reference to present embodiment with invest the described nonwoven cellulosic structure of chart of this specification.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN999MU2004 | 2004-09-17 | ||
| IN999/MUM/2004 | 2004-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101023211A true CN101023211A (en) | 2007-08-22 |
Family
ID=35759097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800311048A Pending CN101023211A (en) | 2004-09-17 | 2005-09-16 | A process for preparing a non-woven cellulosic structure and the non-woven cellulosic structure prepared therefrom |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080023873A1 (en) |
| EP (1) | EP1791996A1 (en) |
| JP (1) | JP2008513620A (en) |
| KR (1) | KR20070061826A (en) |
| CN (1) | CN101023211A (en) |
| WO (1) | WO2006035458A1 (en) |
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| CN105316869A (en) * | 2015-11-25 | 2016-02-10 | 青岛大学 | Technology and equipment for making pure chitosan fiber filament non-woven fabric based on wet spinning technology |
| CN105350182A (en) * | 2015-11-25 | 2016-02-24 | 青岛大学 | Technology and equipment for preparing artificial fiber filament non-woven fabric on basis of dry spinning technique |
| CN105401332A (en) * | 2015-11-25 | 2016-03-16 | 青岛大学 | Method and equipment preparing viscose filament non-woven fabric through wet spinning technology |
| CN105420920A (en) * | 2015-11-25 | 2016-03-23 | 青岛大学 | Process and equipment for preparing pure alginate fiber filament non-woven fabric based on wet spinning technology |
| TWI621742B (en) * | 2014-11-26 | 2018-04-21 | Method for preparing non-woven fabric with hygroscopic transferability by melt-blown method | |
| TWI621743B (en) * | 2014-11-26 | 2018-04-21 | Method for preparing moisture-absorbing transfer non-woven fabric by using short fiber spinning method | |
| TWI632259B (en) * | 2014-11-26 | 2018-08-11 | 聚泰環保材料科技股份有限公司 | Method for preparing moisture-absorbing transfer non-woven fabric by using spunbonding method |
| CN112513358A (en) * | 2018-07-17 | 2021-03-16 | 连津格股份公司 | Method and device for separating solvent from process air in the production of spunbonded fabrics |
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| AT503625B1 (en) | 2006-04-28 | 2013-10-15 | Chemiefaser Lenzing Ag | WATER-IRRADIZED PRODUCT CONTAINING CELLULASIC FIBERS |
| EP2013385A1 (en) * | 2006-04-28 | 2009-01-14 | Lenzing Aktiengesellschaft | Nonwoven melt-blown product |
| AT505621B1 (en) | 2007-11-07 | 2009-03-15 | Chemiefaser Lenzing Ag | METHODS FOR PRODUCING A WATER-IRRADIZED PRODUCT CONTAINING CELLULOSIC FIBERS |
| KR101232440B1 (en) * | 2007-12-10 | 2013-02-12 | 코오롱인더스트리 주식회사 | Process for preparing cellulosic film and cellulosic film |
| CN102926131A (en) * | 2012-10-08 | 2013-02-13 | 稳健实业(深圳)有限公司 | Operation towel and method for producing same |
| US20170007079A1 (en) * | 2015-07-10 | 2017-01-12 | The Procter & Gamble Company | Layered Fibrous Structures and Methods for Making Same |
| EP3231899A1 (en) | 2016-04-14 | 2017-10-18 | TreeToTextile AB | A method and system for the production of a spinning dope composition |
| AT519489B1 (en) | 2016-10-21 | 2021-11-15 | Chemiefaser Lenzing Ag | Method and apparatus for producing cellulose-based nonwovens which are formed directly from Lyocell spinning solution |
| US11220790B2 (en) | 2017-01-20 | 2022-01-11 | The Procter & Gamble Company | Multi-ply fibrous structures |
| US11149383B2 (en) | 2017-01-20 | 2021-10-19 | The Procter & Gamble Company | Layered fibrous structures |
| WO2018184043A1 (en) * | 2017-04-03 | 2018-10-11 | Lenzing Ag | A nonwoven web designed for use in a clean room wipe |
| US10786972B2 (en) | 2018-06-04 | 2020-09-29 | The Procter & Gamble Company | Thick and absorbent and/or flexible toilet tissue |
| US10814587B2 (en) | 2018-06-04 | 2020-10-27 | The Procter & Gamble Company | Fibrous structures comprising a movable surface |
| US20200071882A1 (en) * | 2018-08-29 | 2020-03-05 | Eastman Chemical Company | Cellulose acetate fiber blends for thermal insulation batting |
| CN112981578A (en) * | 2019-12-12 | 2021-06-18 | 连津格股份公司 | Post-treatment and finishing process |
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| US2440057A (en) * | 1944-03-15 | 1948-04-20 | Du Pont | Production of viscose rayon |
| BE542542A (en) * | 1955-01-11 | |||
| US3670069A (en) * | 1969-09-15 | 1972-06-13 | Itt | Process for forming hydroxyethyl cellulose fibers having high water absorption and high water retention properties |
| JPS50988B2 (en) * | 1971-08-30 | 1975-01-14 | ||
| JPS5116546B2 (en) * | 1972-06-03 | 1976-05-25 | ||
| US3833438A (en) * | 1972-08-30 | 1974-09-03 | Asahi Chemical Ind | Process for the manufacture of a non-woven web of continuous filaments through the wet stretch spinning method |
| US5227107A (en) * | 1990-08-07 | 1993-07-13 | Kimberly-Clark Corporation | Process and apparatus for forming nonwovens within a forming chamber |
| US5417909A (en) * | 1992-06-16 | 1995-05-23 | Thuringisches Institut Fur Textil- Und Kunststoff-Forschung E.V. | Process for manufacturing molded articles of cellulose |
| TR28441A (en) * | 1993-05-24 | 1996-07-04 | Courtaulds Fibres Holdings Ltd | Spinning cells that can be used to coagulate lyocell filaments. |
| TW353115B (en) * | 1995-12-21 | 1999-02-21 | Courtaulds Fibres Holdings Ltd | Method of making lyocell filaments; method of manufacture of a cellulose filament from a solution of cellulose in an amine oxide solvent |
| DE10223268B4 (en) * | 2002-05-24 | 2006-06-01 | Zimmer Ag | Wetting device and spinning system with wetting device |
-
2005
- 2005-09-16 EP EP05823538A patent/EP1791996A1/en not_active Withdrawn
- 2005-09-16 WO PCT/IN2005/000315 patent/WO2006035458A1/en active Application Filing
- 2005-09-16 US US11/574,680 patent/US20080023873A1/en not_active Abandoned
- 2005-09-16 CN CNA2005800311048A patent/CN101023211A/en active Pending
- 2005-09-16 KR KR1020077006372A patent/KR20070061826A/en not_active Application Discontinuation
- 2005-09-16 JP JP2007531956A patent/JP2008513620A/en active Pending
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| TWI621742B (en) * | 2014-11-26 | 2018-04-21 | Method for preparing non-woven fabric with hygroscopic transferability by melt-blown method | |
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| CN105401332B (en) * | 2015-11-25 | 2018-08-21 | 青岛大学 | The Processes and apparatus of viscose fiber filament non-woven fabrics is prepared based on wet spinning technology |
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| CN112513358A (en) * | 2018-07-17 | 2021-03-16 | 连津格股份公司 | Method and device for separating solvent from process air in the production of spunbonded fabrics |
| CN112513358B (en) * | 2018-07-17 | 2023-03-07 | 连津格股份公司 | Method and device for separating solvent from process air in the production of spunbonded fabrics |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080023873A1 (en) | 2008-01-31 |
| JP2008513620A (en) | 2008-05-01 |
| WO2006035458B1 (en) | 2006-11-02 |
| KR20070061826A (en) | 2007-06-14 |
| WO2006035458A1 (en) | 2006-04-06 |
| EP1791996A1 (en) | 2007-06-06 |
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