CN113789608A - Preparation method and production equipment of calcium alginate non-woven fabric - Google Patents
Preparation method and production equipment of calcium alginate non-woven fabric Download PDFInfo
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- CN113789608A CN113789608A CN202111135906.0A CN202111135906A CN113789608A CN 113789608 A CN113789608 A CN 113789608A CN 202111135906 A CN202111135906 A CN 202111135906A CN 113789608 A CN113789608 A CN 113789608A
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- sodium alginate
- calcium
- coagulating bath
- trickle
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- 239000000648 calcium alginate Substances 0.000 title claims abstract description 57
- 235000010410 calcium alginate Nutrition 0.000 title claims abstract description 57
- 229960002681 calcium alginate Drugs 0.000 title claims abstract description 57
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 title claims abstract description 57
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 77
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000661 sodium alginate Substances 0.000 claims abstract description 57
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 57
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 57
- 239000000243 solution Substances 0.000 claims abstract description 57
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 39
- 239000001110 calcium chloride Substances 0.000 claims abstract description 39
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 39
- 239000007864 aqueous solution Substances 0.000 claims abstract description 33
- 238000009987 spinning Methods 0.000 claims abstract description 33
- 230000015271 coagulation Effects 0.000 claims abstract description 23
- 238000005345 coagulation Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- 230000001112 coagulating effect Effects 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 235000010443 alginic acid Nutrition 0.000 abstract description 7
- 229920000615 alginic acid Polymers 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 abstract description 3
- 229940072056 alginate Drugs 0.000 abstract description 3
- 238000002166 wet spinning Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 229960001126 alginic acid Drugs 0.000 description 4
- 239000000783 alginic acid Substances 0.000 description 4
- 150000004781 alginic acids Chemical class 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000009960 carding Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 241000199919 Phaeophyceae Species 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 208000016253 exhaustion Diseases 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
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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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/724—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged forming webs during fibre formation, e.g. flash-spinning
-
- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/18—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from other substances
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a preparation method and production equipment of calcium alginate non-woven fabric, which solves the technical problems that the alginate fiber non-woven fabric is complex and tedious in process and a material forming fibers by using a wet spinning method cannot be extruded at high temperature to prepare the non-woven fabric through melting. According to the invention, calcium chloride aqueous solution forms a drafting trickle through a drafting device and a spinning assembly, the sodium alginate solution trickle is drafted and refined to form nascent fiber with a skin-core structure, the nascent fiber is broken after the nascent fiber reaches a conveyor belt through a coagulation bath atomization environment, the sodium alginate solutions in the nascent fiber break, the nascent fiber and the sodium alginate solution flow out and contact with each other to form a bonding point, and the calcium chloride aqueous solution in the coagulation bath is further solidified and drafted to prepare the calcium alginate non-woven fabric with higher strength. The invention also provides production equipment thereof. The invention can be widely applied to the technical field of non-woven fabrics.
Description
Technical Field
The application belongs to the technical field of non-woven fabrics, and particularly relates to a preparation method and production equipment of calcium alginate non-woven fabrics.
Background
The functional layer with filtering function used for the mask, the operating coat and the protective clothing is melt-blown non-woven fabric, polypropylene is used as a main raw material, and the functional layer is prepared by melting, spinning, drawing, net collecting and electret. The original production raw material of polypropylene is petroleum, which is a non-renewable resource, and the consumption of the raw material increases with the risk of exhaustion. The method is characterized in that each person needs one mask every day, 100 ten thousand masks are manufactured by 1 ton of melt-blown fabric, only 1400 tons of melt-blown fabric needs to be consumed every day in China, and huge numbers bring about not only resource consumption but also environmental pollution.
Alginic acid is a natural high molecular material extracted from brown algae plants, is a non-toxic, harmless and biodegradable pure natural green material, is alginic acid fiber prepared by taking alginic acid as a raw material through wet spinning, can be applied to the fields of textiles, clothing, medical health and the like, and is a functional fiber material with high added value.
The field of nonwovens uses other materials, such as: PBT, PA, PE and the like are all prepared into melt-blown fabric by adopting a melt-blowing method. The process is simple. However, some materials, such as alginic acid fiber, cellulose fiber, agar fiber, etc., which need to be spun by a wet method to form fibers, cannot be melt-extruded at high temperature to obtain non-woven fabrics. In patent CN111904874A, a sodium alginate solution containing a traditional Chinese medicine extract solution is subjected to wet spinning to obtain traditional Chinese medicine alginate fibers, and then subjected to opening-carding to form a web-pre-wetting-spunlace-drying-winding to obtain a traditional Chinese medicine alginate fiber non-woven fabric, which has many and complicated manufacturing processes.
Disclosure of Invention
The invention provides a preparation method and production equipment of calcium alginate non-woven fabric, aiming at solving the defects of the background technology, calcium chloride aqueous solution is formed into drafting trickle through a drafting device and a spinning assembly, the sodium alginate solution is drawn and refined into nascent fiber with a skin-core structure, the nascent fiber with a bonding point is formed on a conveying belt through a coagulating bath atomization environment, and the calcium alginate non-woven fabric with higher strength is prepared through further solidification and drawing.
Therefore, the invention provides a preparation method of calcium alginate non-woven fabric, which comprises the following steps:
(1) preparing a sodium alginate solution, and standing and defoaming the sodium alginate solution;
(2) extruding sodium alginate by an extruding device, and spraying the sodium alginate by a spinning component through a filter and a metering pump to obtain a trickle of a sodium alginate solution;
(3) after the calcium chloride aqueous solution is sucked out of the coagulating bath, a part of the calcium chloride aqueous solution is pressurized and conveyed into a spinning assembly through a drafting device to form jet-shaped coagulating bath drafting thin flow, and the sodium alginate solution thin flow forms nascent fiber with a sheath-core structure under the traction and thinning of the coagulating bath drafting thin flow;
(4) conveying the other part of the calcium chloride aqueous solution into a sprayer for atomization, leading the nascent fiber to reach a conveyor belt through an atomized calcium chloride small droplet layer, breaking a skin-core structure to form a bonding point, immersing the nascent fiber into the calcium chloride aqueous solution, solidifying the bonding point to form calcium alginate fiber, and drawing to form the calcium alginate non-woven fabric.
Preferably, in the step (3), the ejection direction of the coagulation bath drafting trickle and the ejection direction of the sodium alginate solution trickle form a certain included angle, and the included angle is 0-90 degrees.
Preferably, the spraying direction of the coagulation bath drafting trickle and the spraying direction of the sodium alginate solution trickle form a certain included angle, and the included angle is 45 degrees.
Preferably, the spraying direction of the coagulation bath drafting trickle and the spraying direction of the sodium alginate solution trickle form a certain included angle, and the included angle is 30 degrees.
Preferably, in step (3), the diameter of the nascent fiber is 10 μm or less.
Preferably, in step (3), the concentration of the calcium chloride aqueous solution is 4-20% by weight.
Meanwhile, the invention provides production equipment of calcium alginate non-woven fabric, which is used for implementing a preparation method of the calcium alginate non-woven fabric and comprises an extrusion device, a filter, a metering pump, a drafting device, a spinning component, a sprayer, a liquid suction pump, a coagulating bath, a conveying belt, a drafting roller, a water washing and drying device and a winding device; the extruding device is sequentially connected with the filter and the metering pump, the drafting device, the spinning assembly and the sprayer are sequentially arranged below the metering pump, one end of the liquid suction pump is communicated with the coagulating bath, the other end of the liquid suction pump is respectively connected with the drafting device and the sprayer, and the conveying belt part is arranged in the coagulating bath and is sequentially connected with the washing and drying device and the winding device.
Preferably, the filter is provided with three layers of filter screens, the mesh number of the filter screens is 100-400 meshes, and the bottom of the coagulating bath tank is provided with the filter screens.
Preferably, the distance between the spinning pack and the conveyor belt is 5-50 cm.
The invention has the beneficial effects that:
(1) the invention provides a preparation method of calcium alginate non-woven fabric, wherein a filter screen capable of filtering most of floating short fibers is arranged at the bottom of a coagulating bath tank, and a calcium chloride aqueous solution in the coagulating bath tank is conveyed to a drafting device and a sprayer by a liquid suction pump. Calcium chloride aqueous solution passing through the drafting device enters a spinning assembly to form coagulating bath drafting fluid, the spraying direction of the coagulating bath drafting fluid and the spraying direction of the sodium alginate solution trickle present an included angle of 0-90 degrees, a force vertical and parallel to the flowing direction of the sodium alginate solution is provided, and the coagulating bath drafting fluid is solidified, drafted and refined into nascent fiber with a sheath-core structure; on the other hand, the calcium chloride aqueous solution forms a large amount of calcium chloride droplets after atomization to form a humid environment to wrap nascent fibers, which is beneficial to the formation of a skin-core structure.
(2) In the preparation method of the calcium alginate non-woven fabric, the calcium chloride aqueous solution in the coagulating bath tank is conveyed into the sprayer by the liquid suction pump, the coagulating bath solution is converted into small liquid drops to be attached to the surface of the nascent fiber, so that the surface is ensured to be wet, a coagulating bath environment is provided for the further formation of the calcium alginate fiber, and the nascent fiber is promoted to be converted into the calcium alginate fiber. When the nascent fiber with the sheath-core structure reaches the conveying belt, the outer sheath layer is broken due to impact, the sodium alginate solution inside flows out, and the solutions are mutually contacted and fused. When the conveyor belt is immersed in the coagulating bath tank, the sodium alginate solution among the nascent fibers is solidified to form bonding points, the bonding points are calcium alginate fibers, and the calcium alginate non-woven fabric with higher strength is formed by drafting of the drafting rollers.
(3) In the preparation method of the calcium alginate non-woven fabric, the number of bonding points among fibers of the non-woven fabric can be controlled by limiting the distance between the spinning assembly and the conveyor belt to be 5-50cm and the concentration of the coagulating bath, so that the calcium alginate non-woven fabric with a fluffy or compact structure can be conveniently obtained.
(4) Compared with the prior art, the calcium alginate non-woven fabric is prepared by adopting a one-step method, so that the links of opening, carding to form a net, prewetting, spunlacing and the like are eliminated, and manpower and material resources are greatly saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic view showing the structure of the calcium alginate nonwoven fabric of example 1 of the present invention;
FIG. 2 is a schematic view showing the structure of the calcium alginate nonwoven fabric of examples 2 and 3 in the present invention;
FIG. 3 is a schematic view of the interior of a spin pack of the present invention.
The symbols in the drawings illustrate that:
1. a liquid storage barrel; 2. a screw; 3. a filter; 4. a metering pump; 5. a spinneret assembly; 6. a liquid suction pump; 7. a coagulation bath; 8. a conveyor belt; 9. a water washing and drying device; 10. a winding device; 11. a sprayer; 12. a drawing device; 13. a tank-type reaction kettle; 14. a spinneret plate;
A. an aqueous solution of calcium chloride; B. a sodium alginate solution; alpha, the spraying direction of the coagulation bath drafting fluid and the spraying direction of the sodium alginate solution trickle.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Example 1
A production device of calcium alginate non-woven fabric is shown in figure 1 or figure 2 and comprises an extrusion device, a filter 3, a metering pump 4, a drafting device 12, a spinning pack 5, a sprayer 11, a coagulating bath 7, a conveyor belt 8, a water washing and drying device 9 and a winding device 10, wherein the extrusion device can be an extrusion device consisting of a liquid storage barrel 1 and a screw 2 or a tank type reaction kettle 13.
The extrusion device is connected with the filter 3, the filter 3 is provided with three layers of filter screens, the number of the filter screens is 100-400 meshes, so that the impurities in the sodium alginate solution can be conveniently filtered, and the subsequent spinneret orifices can be prevented from being blocked. In order to ensure that the prepared non-woven fabric has even gram weight and stable quality, the filter 3 is connected with the metering pump 4 and is accurately metered by the metering pump 4.
A drafting device 12, a spinning pack 5, a sprayer 11 and a coagulating bath 7 are arranged below the metering pump 4 in sequence, a coagulating bath is arranged in the coagulating bath 7, and the coagulating bath is preferably calcium chloride aqueous solution. The bottom of the coagulating bath tank 7 is provided with a filter screen which can filter out most of the floating short fibers. One end of the coagulating bath tank 7 is connected with a liquid suction pump 6, the other end of the liquid suction pump 6 is connected with a drafting device 12 and used for conveying the coagulating bath in the coagulating bath tank 7 into the drafting device 12, and a spinning assembly 5 is arranged below the drafting device 12; the drawing device 12 is provided for controlling the pressure of the coagulation bath in the spinning pack 5 and the temperature and speed at the time of spinning. As shown in fig. 3, the coagulation bath passing through the drawing device 12 flows into the spinning pack 5 below the drawing device 12, and forms a jet-like coagulation bath drawn stream after passing through the coagulation bath pores of the spinning pack 5; meanwhile, the sodium alginate solution is sprayed out through a spinneret plate 14 of the spinneret component 5 to form a sodium alginate solution trickle, on one hand, the sodium alginate solution trickle is wrapped by the coagulation bath drafting fluid to form a wet environment, which is beneficial to the formation of nascent fiber; on the other hand, the spraying direction of the coagulation bath drafting fluid and the spraying direction of the sodium alginate solution trickle form a certain included angle alpha which is 0-90 degrees, so that the coagulation bath drafting fluid provides force vertical to and parallel to the flowing direction of the sodium alginate solution trickle, and the coagulation bath drafting fluid is drawn and refined into nascent fiber.
The nascent fiber is a fiber with a sheath-core structure, the sheath-core structure is a fiber structure with a calcium alginate cortex layer wrapping a sodium alginate solution, specifically, the surface of the sodium alginate solution is contacted with a calcium chloride aqueous solution and is rapidly solidified to form the calcium alginate cortex layer, the calcium alginate cortex layer wraps the sodium alginate which is not contacted with the calcium chloride aqueous solution, and the nascent fiber with the fiber diameter of less than 10 microns is formed by means of gravity and traction of a drafting fluid.
When the primary fibers pass through the atomized coagulation bath environment and reach the conveyor belt 8, the conveyor belt 8 immediately carries the primary fibers to be immersed into the coagulation bath, part of the primary fibers are broken due to impact, the sodium alginate solution in the primary fibers flows out, and the primary fibers and the sodium alginate solution flowing out of other primary fibers are fused and bonded together to form bonding points, and the bonding points are further solidified to form calcium alginate fibers as the number of the primary fibers immersed into the coagulation bath is increased. And then drawing to form calcium alginate non-woven fabric with certain strength, then washing and drying the non-woven fabric by a water washing and drying device 9, and then reaching a winding device 10 for slitting and winding to form a calcium alginate non-woven fabric product.
Further, by limiting the distance between the spinneret assembly 5 and the conveyor belt 8 to 5-50cm and the concentration of the coagulation bath to 4% -20% by weight, the number of bonding points between fibers of the nonwoven fabric can be controlled, thereby facilitating the obtainment of a calcium alginate nonwoven fabric with a fluffy or dense structure.
Example 2 a method for preparing a calcium alginate nonwoven fabric, as shown in fig. 1, specifically comprises the following steps:
(1) and (3) introducing the sodium alginate solution into the liquid storage barrel 1, and performing standing and defoaming treatment to provide stable raw material supply for subsequent production.
(2) The rotation of the screw rod 2 is utilized to send out the sodium alginate solution, and the sodium alginate solution passes through the filter 3 with the mesh number of 100 and the metering pump 4 and then is sent into the spinning pack 5, so as to obtain the trickle of the sodium alginate solution.
(3) The liquid suction pump 6 sucks out a calcium chloride aqueous solution with the concentration of 4% by weight from the coagulating bath 7, a part of the calcium chloride aqueous solution is conveyed into the drawing device 12 to form a drawing fluid, the drawing fluid is conveyed into the spinning pack 5 and flows out from the coagulating bath pores beside the spinning plate 14 to form a jet-shaped coagulating bath drawing trickle, the spraying direction of the coagulating bath drawing trickle and the spraying direction of the sodium alginate solution trickle in the spinning pack 5 form an included angle of 45 degrees, and a nascent fiber with the fiber diameter of 3 mu m is formed under the drawing and thinning of the coagulating bath drawing trickle.
(4) Set up distance that spinneret component 5 and conveyer belt 8 are 50cm, inhale liquid pump 6 and carry some calcium chloride to atomizer 11 in the atomizing, the nascent fibre is when atomizing calcium chloride aqueous solution reaches conveyer belt 8, some nascent fibre's skin core structure breaks, inside sodium alginate solution flows out, make the sodium alginate solution solidification between the nascent fibre form the adhesive point, the adhesive point further solidifies in calcium chloride aqueous solution and forms the calcium alginate fibre, through the draft, form calcium alginate non-woven fabrics, reach take-up device 10 behind the washing drying device 9 and cut the package, make the fluffy calcium alginate non-woven fabrics goods of structure.
Example 3 a method for preparing a calcium alginate nonwoven fabric, as shown in fig. 2, specifically comprises the following steps:
(1) the sodium alginate solution is subjected to standing and defoaming treatment, so that stable raw material supply is provided for subsequent production.
(2) The sodium alginate solution is led into a tank type reaction kettle 13 to be pressurized and extruded, and then is sent into a spinning pack 5 after passing through a filter 3 with 400 meshes and a metering pump 4.
(3) The liquid suction pump 6 sucks out the calcium chloride aqueous solution with the concentration of 20% by weight from the coagulating bath 7, and then part of the calcium chloride aqueous solution is conveyed into the drawing device 12 to form drawing fluid, the drawing fluid is conveyed into the spinning pack 5 and flows out from the coagulating bath pores beside the spinning plate 14 to form jet-shaped coagulating bath drawing thin flow, the spraying direction of the coagulating bath drawing thin flow and the spraying direction of the sodium alginate solution thin flow in the spinning pack 5 form an included angle of 30 degrees, and primary fiber with the fiber diameter of 10 mu m is formed under the drawing and thinning of the coagulating bath drawing thin flow.
(4) Set up spinneret component 5 and conveyer belt 8's distance and be 5cm, inhale liquid pump 6 and carry some calcium chloride to atomizer 11 in the atomizing, the nascent fibre is when the atomizing calcium chloride aqueous solution reaches conveyer belt 8, some nascent fibre's skin core structure breaks, inside sodium alginate solution flows out, make the sodium alginate solution solidification between the nascent fibre form the adhesive point, the adhesive point further solidifies in the calcium chloride aqueous solution and forms the calcium alginate fibre, through the draft, form calcium alginate non-woven fabrics, reach take-up device 10 after the washing drying device 9 and cut the package, make the calcium alginate non-woven fabrics goods that the structure is fine and close.
Example 4a method for preparing a calcium alginate nonwoven fabric, as shown in fig. 2, specifically comprises the following steps:
(1) the sodium alginate solution is subjected to standing and defoaming treatment, so that stable raw material supply is provided for subsequent production.
(2) The sodium alginate solution is led into a tank type reaction kettle 13 to be pressurized and extruded, and then is sent into a spinning pack 5 after passing through a filter 3 with the mesh number of 300 and a metering pump 4.
(3) The liquid suction pump 6 sucks out the calcium chloride aqueous solution with the concentration of 12% by weight from the coagulating bath 7, and then part of the calcium chloride aqueous solution is conveyed into the drawing device 12 to form drawing fluid, the drawing fluid is conveyed into the spinning pack 5 and flows out from the coagulating bath pores beside the spinning plate 14 to form jet-shaped coagulating bath drawing thin flow, the spraying direction of the coagulating bath drawing thin flow and the spraying direction of the sodium alginate solution thin flow in the spinning pack 5 form an included angle of 45 degrees, and primary fiber with the fiber diameter of 6 mu m is formed under the drawing and thinning of the coagulating bath drawing thin flow.
(4) Set up spinneret component 5 and conveyer belt 8's distance and be 25cm, inhale liquid pump 6 and carry some calcium chloride to atomizer 11 in the atomizing, the nascent fibre is when the atomizing calcium chloride aqueous solution reaches conveyer belt 8, some nascent fibre's skin core structure breaks, inside sodium alginate solution flows out, make the sodium alginate solution solidification between the nascent fibre form the adhesive point, the adhesive point further solidifies in the calcium chloride aqueous solution and forms the calcium alginate fibre, through the draft, form calcium alginate non-woven fabrics, reach take-up device 10 after the washing drying device 9 and cut the package, make the fluffy calcium alginate non-woven fabrics goods of structure.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. The preparation method of the calcium alginate non-woven fabric is characterized by comprising the following steps:
(1) preparing a sodium alginate solution, and standing and defoaming the sodium alginate solution;
(2) extruding sodium alginate by an extruding device, and spraying the sodium alginate by a spinning component through a filter and a metering pump to obtain a trickle of a sodium alginate solution;
(3) after the calcium chloride aqueous solution is sucked out of the coagulating bath, a part of the calcium chloride aqueous solution is pressurized and conveyed into a spinning assembly through a drafting device to form jet-shaped coagulating bath drafting thin flow, and the sodium alginate solution thin flow forms nascent fiber with a sheath-core structure under the traction and thinning of the coagulating bath drafting thin flow;
(4) conveying the other part of the calcium chloride aqueous solution into a sprayer for atomization, leading the nascent fiber to reach a conveyor belt through an atomized calcium chloride small droplet layer, breaking a skin-core structure to form a bonding point, immersing the nascent fiber into the calcium chloride aqueous solution, solidifying the bonding point to form calcium alginate fiber, and drawing to form the calcium alginate non-woven fabric.
2. The method for preparing calcium alginate nonwoven fabric according to claim 1, wherein in the step (3), the spraying direction of the coagulation bath drafting trickle and the spraying direction of the sodium alginate solution trickle form an included angle, and the included angle is 0-90 degrees.
3. The method for preparing calcium alginate nonwoven fabric according to claim 2, wherein the direction of the jet of the drafting trickle of the coagulating bath and the direction of the jet of the trickle of the sodium alginate solution form an included angle of 45 °.
4. The method for preparing calcium alginate nonwoven fabric according to claim 2, wherein the direction of the jet of the drafting trickle of the coagulating bath and the direction of the jet of the trickle of the sodium alginate solution form an included angle of 30 °.
5. The method for preparing calcium alginate nonwoven fabric according to claim 1, wherein in the step (3), the diameter of the nascent fiber is less than 10 μm.
6. The method for preparing calcium alginate nonwoven fabric according to claim 1, wherein in the step (3), the concentration of the calcium chloride aqueous solution is 4-20% by weight.
7. A production facility of calcium alginate non-woven fabric, which is used for implementing the preparation method of calcium alginate non-woven fabric of any one of claims 1 to 6, and is characterized by comprising an extrusion device, a filter, a metering pump, a drafting device, a spinning assembly, a sprayer, a liquid suction pump, a coagulating bath, a conveyor belt, a drafting roller, a water washing and drying device and a winding device; the extruding device is sequentially connected with the filter and the metering pump, a drafting device, a spinning assembly and a sprayer are sequentially arranged below the metering pump, one end of the liquid suction pump is communicated with the coagulating bath, the other end of the liquid suction pump is respectively connected with the drafting device and the sprayer, and the conveying belt part is arranged in the coagulating bath and sequentially connected with the washing and drying device and the winding device.
8. The apparatus for producing calcium alginate nonwoven fabric as defined in claim 7, wherein the filter is provided with three layers of filter screens, the number of the filter screens is 100-400 meshes, and the bottom of the coagulating bath is provided with a filter screen.
9. The apparatus for producing calcium alginate nonwoven fabric as set forth in claim 7, wherein the distance between the spinneret assembly and the conveyor belt is 5-50 cm.
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