CN114150439A - Drawing device of flash spinning tow net and flash spinning equipment - Google Patents
Drawing device of flash spinning tow net and flash spinning equipment Download PDFInfo
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- CN114150439A CN114150439A CN202111433248.3A CN202111433248A CN114150439A CN 114150439 A CN114150439 A CN 114150439A CN 202111433248 A CN202111433248 A CN 202111433248A CN 114150439 A CN114150439 A CN 114150439A
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- flash spinning
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- 238000009987 spinning Methods 0.000 title claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims description 41
- 238000004891 communication Methods 0.000 claims description 9
- 239000004751 flashspun nonwoven Substances 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 229920001474 Flashspun fabric Polymers 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 27
- 239000007789 gas Substances 0.000 description 84
- 230000000694 effects Effects 0.000 description 9
- 239000004745 nonwoven fabric Substances 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention relates to the technical field of flash spinning, in particular to a drawing device of a flash spinning tow net and flash spinning equipment, wherein the drawing device of the flash spinning tow net comprises a shell, a drainage expanding mechanism and a gas channel, wherein the drainage expanding mechanism penetrates through the shell from top to bottom and is used for the tow net to penetrate through, and the gas channel is communicated with the drainage expanding mechanism; the drainage expanding mechanism at least comprises a deflection inner wall which enables airflow to deflect, and the deflection inner wall enables the flow direction of drafting gas entering the drainage expanding mechanism from the gas channel to deflect and then acts on the tow net to enable the tow net to be drafted. The flow direction of the drafting gas on the deflected inner wall deflects and then acts on the tow net passing through the drainage expanding mechanism, the tow net carrying the solvent gas is dragged and accelerated by the drafting gas flow after meeting the drafting gas flow in the drainage expanding mechanism, so that the moving speed of one section of the tow net is higher than that of the other section of the tow net, and the tow net is drafted from the moving speed, so that the orientation degree and the breaking strength of the tow net are improved.
Description
Technical Field
The invention relates to the technical field of flash spinning, in particular to a drawing device of a flash spinning tow net and flash spinning equipment.
Background
Flash spinning refers to the high polymer solution being extruded at a high pressure above the boiling point of the solvent, the extruded solution trickles, causing the solvent to flash when the pressure is suddenly reduced, and solidifying the high polymer into fibers. Solvent flash-spinning, also known as solution flash-spinning, results in a spinning process where the polymer cools to solidify to form fibers. Flash spinning requires that the polymer and solvent are not decomposed above the boiling point of the solvent, and that the solvent is easily evaporated.
The flash spinning technology is used as a method for producing non-woven fabrics, and the main process is as follows: dissolving a high molecular polymer in a solvent to form a high molecular solution, ejecting the high molecular solution from a spinneret orifice into a medium area with different temperature or pressure from the original medium area to form a liquid trickle, flashing the solvent in the trickle to change the form of the original trickle and take away heat, and quickly cooling a solute, namely the high molecular polymer after precipitation to form a solvent airflow and a filament bundle with a superfine three-dimensional network structure; the tows are deposited and collected in a certain method to form the non-woven fabric.
Although the Chinese patent application (publication number is CN107740198A) discloses a flash spinning device and a spinning method thereof, an air amplifier is adopted to replace the traditional electrostatic device to open the fiber, so that the prepared fiber has small diameter and high strength; however, when the non-woven fabric is produced by flash spinning in the prior art, a small amount of drafting can be generated on the fiber only by virtue of solvent airflow formed after the flash evaporation of the spinning solvent, and because a large amount of heat is taken away by solvent vaporization in the flash evaporation process, the temperature of the tow net which is only subjected to the flash evaporation drafting by the solvent is low, so that the drafting effect is poor.
Disclosure of Invention
In order to solve the defect of poor drafting effect of the tow net in the prior art, the invention provides the drafting device of the flash spinning tow net and the flash spinning equipment, which can improve the drafting effect of the tow net.
The invention provides a drafting device of a flash spinning tow net, which comprises a shell, a drainage expanding mechanism and a gas channel, wherein the drainage expanding mechanism penetrates through the shell from top to bottom and is used for the tow net to penetrate through, and the gas channel is communicated with the drainage expanding mechanism; the flow guiding expansion mechanism at least comprises a deflection inner wall which enables airflow to deflect, and the deflection inner wall enables the flow direction of drafting gas entering the flow guiding expansion mechanism from the gas channel to deflect and then acts on the tow net to enable the tow net to be drafted.
In one embodiment, the drainage expansion mechanism comprises a fiber inlet, a fiber outlet, a drainage chamber located in the housing and in communication with the fiber inlet, and an expansion chamber in communication with the drainage chamber and the fiber outlet, respectively, the fiber inlet and the fiber outlet being located on opposite top and bottom surfaces of the housing, respectively.
In one embodiment, the drainage chamber is located above the expansion chamber, the drainage chamber narrowing from the fibre inlet to where it communicates with the expansion chamber; the expansion chamber is gradually enlarged from the place where the expansion chamber communicates with the drainage chamber to the fiber outlet.
In one embodiment, the deflecting inner wall is disposed at the communication between the drainage chamber and the expansion chamber, and the deflecting inner wall is disposed toward the fiber outlet.
In one embodiment, the gas passage includes an annular high pressure gas flow chamber in communication with the flow-inducing expansion mechanism; the communication part of the drainage chamber and the expansion chamber is communicated with the annular high-pressure airflow chamber through an annular gap.
In an embodiment, the annular gap is provided at the deflecting inner wall.
In one embodiment, the gas passage further comprises a compressed gas inlet disposed on a side surface of the housing, and the annular high-pressure gas flow chamber is further communicated with the compressed gas inlet, and at least one compressed gas inlet is disposed.
In one embodiment, a drawing gas enters the drawing device through the compressed gas inlet, the drawing gas having a temperature above the melting point temperature of the web of tows; the temperature of the drawing gas is 100-200 ℃; the pressure of the drafting gas is 6-10 MPa.
The invention also provides flash spinning equipment which comprises at least one drafting device, wherein the drafting device is arranged below the deflection plate, and the drafting device adopts the drafting device of the flash spinning tow net.
In one embodiment, the drafting device accelerates the tow web by between 10-30%.
Based on the above, compared with the prior art, according to the drawing device of the flash evaporation spinning tow net and the flash evaporation spinning equipment provided by the invention, the drawing gas enters the drainage expanding mechanism through the gas channel, the flow direction of the drawing gas is deflected through the deflection inner wall, and then acts on the tow net passing through the drainage expanding mechanism, the tow net carrying the solvent gas is dragged and accelerated by the drawing gas flow after meeting with the drawing gas flow in the drainage expanding mechanism, so that the moving speed of one section of the tow net is higher than that of the other section of the tow net, and the tow net is drawn accordingly, thereby improving the orientation degree and breaking strength of the tow net.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts; in the following description, the drawings are illustrated in a schematic view, and the drawings are not intended to limit the present invention.
FIG. 1 is a side cross-sectional view of a drafting apparatus provided in the present invention;
FIG. 2 is a top view of the drafting device provided by the present invention;
FIG. 3 is a front partial cross-sectional view of a drawing apparatus and flash spinning deflector as provided by the present invention;
fig. 4 is a schematic structural diagram of a flash spinning apparatus provided by the present invention.
Reference numerals:
1 case 2 spinning device 3 step-down plate
4 low temperature pressure area 5 spinneret orifice 6 filament bundle
7 deflector 8 draft device 9 collection surface
10 non-woven fabric precondition 11 sealing roller 12 forming roller
13 finished product non-woven fabric 14 bearing 15 rotating shaft
16 drive shaft 17 tow net 18 recovery hole
80 housing 81 fiber inlet 82 drainage chamber
83 expansion chamber 84 fibre outlet 85 compressed gas inlet
86 annular high pressure gas flow chamber 87 annular gap 88 deflecting inner wall
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; the technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be noted that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and are not to be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The drafting device of the flash evaporation spinning tow net comprises a shell 80, a drainage expanding mechanism and a gas channel, wherein the drainage expanding mechanism penetrates through the shell 80 from top to bottom and is used for the tow net to penetrate through, and the gas channel is communicated with the drainage expanding mechanism; the flow guide expansion mechanism at least comprises a deflection inner wall 88 which deflects the airflow, and the deflection inner wall 88 deflects the airflow in the air channel and then acts on the tow net to draft the tow net.
In specific implementation, as shown in fig. 1 to 3, the drainage expansion mechanism penetrates through the housing 80 from top to bottom and is located inside the housing 80, the gas channel is communicated with the drainage expansion mechanism, high-speed drafting gas is formed after high-temperature and high-pressure drafting gas enters the drainage expansion mechanism through the gas channel, the high-speed drafting gas acts on the tow net penetrating through the drainage expansion mechanism, the tow net carrying solvent gas is dragged and accelerated by the high-speed drafting gas after meeting with the high-speed drafting gas in the drainage expansion mechanism, so that the moving speed of one section of the tow net is greater than that of the other section of the tow net, and the tow net is drawn accordingly.
Specifically, as shown in fig. 1 and 2, the drainage expansion mechanism includes a fiber inlet 81, a fiber outlet 84, a drainage chamber 82 located in the housing 80 and communicated with the fiber inlet 81, and an expansion chamber 83 located in the housing 80 and respectively communicated with the drainage chamber 82 and the fiber outlet 84, the housing 80 has a top surface and a bottom surface opposite to each other, the fiber inlet 81 is disposed on the top surface of the housing 80, the fiber outlet 84 is disposed on the bottom surface of the housing 80, and the housing 80 is viewed from above away from the top surface of the housing 80, and the housing 80 is in a shape of a kidney circle.
As shown in fig. 1, the drainage chamber 82 is located above the expansion chamber 83, and from the fiber inlet 81 to the point where the drainage chamber 82 communicates with the expansion chamber 83, the drainage chamber 82 narrows gradually, i.e., the width of the drainage chamber 82 decreases gradually; from where the expansion chamber 83 communicates with the drainage chamber 82 to the fibre outlet 84, the expansion chamber 83 is progressively enlarged, i.e. the width of the expansion chamber 83 is progressively increased.
As shown in fig. 1, a deflection inner wall 88 is arranged at the communication part of the drainage chamber 82 and the expansion chamber 83, the deflection inner wall 88 relatively protrudes out of the communication part of the drainage chamber 82 and the expansion chamber 83, the protruding part of the deflection inner wall 88 is arranged towards the fiber outlet 84, and the deflection inner wall 88 deflects the flow direction of the drafting gas entering the drainage expansion mechanism from the gas channel and then acts on the tow net so as to draw the tow net.
Specifically, the high-temperature and high-pressure drafting gas enters the drafting device from the gas channel, passes through the annular gap 87 and is converted into high-speed drafting gas flow, the drafting gas flow and the deflection inner wall 88 interact to generate a wall attachment effect, and the direction of the drafting gas flow faces the direction of the expansion chamber 83 and the fiber outlet 84; the temperature and velocity of the drawing gas in this example are both higher than the temperature and velocity of the solvent gas entrained web of tow.
As shown in fig. 1 to 3, an annular gap 87 is provided at the deflecting inner wall 88, and the gas passage is communicated with the flow-inducing expansion mechanism through the annular gap 87, specifically, the gas passage includes an annular high-pressure gas flow chamber 86 and compressed gas inlets 85 provided at the side of the housing 80, at least one of the compressed gas inlets 85 is provided, each of the compressed gas inlets 85 is communicated with the annular high-pressure gas flow chamber 86, preferably, the annular high-pressure gas flow chamber 86 has a shape matching the shape of the housing 80, and the annular high-pressure gas flow chamber 86 has a shape of a kidney circle.
The drawing gas entering the drawing device through the compressed gas inlet 85 may be a high temperature, high pressure gas that does not react with the flash spin solvent, for example, nitrogen (N)2) And carbon dioxide (CO)2) Etc. gases of one or more solvents in the flash spinning solution used in the process may also be selected, for example, trichlorofluoromethane, difluoromethane, tetrafluorodichloroethane, cyclohexane, etc.
Preferably, the pressure of the drawing gas may be 6 to 10MPa, the temperature of the drawing gas is higher than the melting point temperature of the web of tows, for example, the temperature of the drawing gas may be 100 ℃ and 200 ℃, the drawing gas is converted into a high-speed drawing gas stream after passing through the annular gap 87, the kinetic energy is increased, the temperature is decreased, and therefore, the temperature of the drawing gas needs to be higher than the optimum drawing temperature of the web of tows.
As shown in fig. 1 to 3, in the drawing device of a flash-spun tow web provided by the present invention, in actual operation, a swinging tow web carrying a solvent gas flow is deflected by a deflector plate, enters a draft chamber 82 of the drawing device through a fiber inlet 81, and moves towards an expansion chamber 83, after passing through an annular gap 87, a draft gas entering an annular high-pressure gas flow chamber 86 through a compressed gas inlet 85 is converted into a high-speed draft gas flow, interacts with a deflection inner wall 88 to generate a wall attachment effect, and after meeting the draft gas flow in the expansion chamber 83, the tow web carrying the solvent gas is drawn and accelerated by the draft gas flow, so that the moving speed of the tow web section in the expansion chamber 83 is greater than that in the draft chamber 82, and the tow web is thereby drawn.
Preferably, the temperature of the drafting air flow behind the annular gap 87 can be indirectly controlled by controlling the temperature of the drafting air, and the drafting air flow with a certain temperature can heat the tow net, so that the drafting effect of the tow net is further improved.
Preferably, the speed of the drawing device of the embodiment accelerates the moving speed of the flash-spun tow web by 10-30%, too high acceleration may cause the tow web to break during drawing, and too low speed may cause poor drawing effect.
In order to better illustrate that the drafting device provided by the invention can effectively draft the flash spinning tow net, improve the crystallization orientation degree of fibers and improve the breaking strength of the flash spinning tow net, high-density polyethylene (HDPE) with the melt index of 8g/10min is selected as a flash spinning solute, difluorochloromethane (R22) and tetrafluorodichloroethane (R114) are selected as flash spinning solvents, and nitrogen (N) is selected2) As a pressurized gas for dissolution and a high-temperature high-pressure drawing gas source of a drawing device.
HDPE, R22, R144 as 6: 33: 11 mass percent is 6MPa N2Pressurizing and stirring the mixture at 220 ℃ to dissolve the mixture to prepare flash spinning solution.
Three sets of comparative experiments were performed below, in which,
the group A adopts the traditional spinning scheme to carry out flash spinning, namely, a drafting device is not added to carry out flash spinning;
b group, on the basis of the traditional spinning scheme, a drafting device provided by the invention is arranged below the deflection plate for flash spinning, and in the spinning process, the drafting device is used for flash spinningN of 8.5MPa and 150 ℃ is introduced through a compressed gas inlet2Accelerating the tow web from about 10000m/min to 12000 m/min;
and the group C carries out flash spinning according to flash spinning equipment and a spinning method thereof disclosed by Chinese patent application (with the publication number of CN 107740198A).
The ABC three groups of spun tow nets were collected, and the breaking strength (cN/dtex) and the degree of orientation (%) were measured after twisting the collected tow net fiber bundles for 80 turns per 20cm, and the results are shown in Table 1.
| Group of | Breaking strength/cN dtex-1 | Degree of orientation/%) |
| A | 3.8 | 85 |
| B | 4.9 | 92 |
| C | 4.3 | 89 |
TABLE 1
As can be seen from table 1, the orientation degree and breaking strength of group B are both greater than those of groups a and C, and it can be seen that the breaking strength and orientation degree of the tow web obtained by the flash spinning process can be improved by using high-temperature and high-pressure drawing gas as drawing power after the spinning tow web is drawn by the drawing device provided by the present invention.
As shown in fig. 3 and 4, the present invention further provides a flash spinning apparatus, comprising at least one drawing device 8, wherein the drawing device 8 is disposed below the deflection plate 7, and the drawing device 8 is the drawing device for flash spinning the tow web as described above.
In specific implementation, as shown in fig. 3 and 4, the process of producing the non-woven fabric by flash spinning occurs in the box 1, and the connection relationship and the position relationship of the mechanisms, the parts and the like in the box 1 are the prior art and are not described herein again. A draft device 8 is provided below the deflector 7, and the number of draft devices 8 is at least one, or a plurality of draft devices 8 may be provided, and the draft devices 8 may be arranged to be accelerated step by step to achieve a higher draft ratio.
Specifically, the polymer solution is pumped into the spinning device 2, passes through the internal pressure reduction plate 3, enters the low temperature pressure area 4 with the temperature or pressure lower than that before, the polymer solution starts to phase separate, and then is ejected from the spinneret holes 5 to the environment with the temperature or pressure lower to form the tows 6 with the superfine three-dimensional network structure.
For better collection of the tow 6 in the three-dimensional network, the tow 6 and the solvent gas stream are deflected by the deflector 7, which is driven in rotation by a rotary shaft 15 mounted on a bearing 14, in the direction of the collection surface 9 driven by a drive shaft 16, and the tow 6 is dispersed from the three-dimensional network into a flat network of a certain width, i.e. a tow net 17, as a result of the reaction force of the deflector 7.
The swinging tow net 17 with the solvent air flow deflected by the deflection plate 7 enters the diversion chamber 82 of the drafting device 8 from the fiber inlet 81 and moves to the expansion chamber 83, the drafting air entering the annular high-pressure air flow chamber 86 from the compressed air inlet 85 passes through the annular gap 87, the drafting air is converted into high-speed drafting air flow, the high-speed drafting air flow interacts with the deflection inner wall 88 to generate a wall attachment effect, the tow net with the solvent air meets the drafting air flow in the expansion chamber 83 and is dragged and accelerated by the drafting air flow, the tow net segment movement speed in the expansion chamber 83 is larger than that in the diversion chamber 82, and the tow net 17 is drafted accordingly.
The temperature of the drafting airflow behind the annular gap 87 can be indirectly controlled by controlling the temperature of the drafting air, the drafting airflow with a certain temperature can heat the tow net 17, and the drafting effect of the tow net is further improved.
The zone where the deflector plate 7 collides with the tow 6 has a particular profile (not shown in the figures, which is not described in detail here for the prior art), so that the tow web 17 oscillates in a direction perpendicular or at an angle to the direction of movement of the collecting surface, with a certain amplitude and frequency, in the plane of the contact surface of the deflector plate 7 with the tow.
The tow net 17 is deposited on the collecting surface in the above form to form a non-woven fabric precursor 10, and then the non-woven fabric precursor is passed through a sealing roller 11, a forming roller 12 and some subsequent treatments to obtain a finished non-woven fabric 13; the solvent gas then passes through the recovery holes 18 to the recovery device.
In summary, compared with the prior art, according to the drawing device and the flash spinning equipment for the flash spinning tow net provided by the invention, the drawing gas enters the drainage expansion mechanism through the gas channel, the gas flow direction of the gas is deflected and then acts on the tow net passing through the drainage expansion mechanism, the tow net carrying the solvent gas is dragged and accelerated by the high-speed gas flow after meeting the high-speed gas flow in the drainage expansion mechanism, so that the moving speed of one section of the tow net is higher than that of the other section of the tow net, and the tow net is drawn accordingly, so that the orientation degree and the breaking strength of the tow net are improved.
In addition, it will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or aspect of the present invention may be improved only in one or several respects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.
Although terms such as housing, fiber inlet, fiber outlet, annular high pressure gas flow chamber and annular gap are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention; the terms "first," "second," and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A drawing apparatus for flash spinning a tow web, comprising: the device comprises a shell, a drainage expansion mechanism and an air channel, wherein the drainage expansion mechanism penetrates through the shell from top to bottom and is used for a tow net to penetrate through, and the air channel is communicated with the drainage expansion mechanism; the flow guiding expansion mechanism at least comprises a deflection inner wall which enables airflow to deflect, and the deflection inner wall enables the flow direction of drafting gas entering the flow guiding expansion mechanism from the gas channel to deflect and then acts on the tow net to enable the tow net to be drafted.
2. The drawing apparatus for flash spinning a tow web according to claim 1, wherein: the drainage expansion mechanism comprises a fiber inlet, a fiber outlet, a drainage chamber positioned in the shell and communicated with the fiber inlet, and an expansion chamber respectively communicated with the drainage chamber and the fiber outlet, wherein the fiber inlet and the fiber outlet are respectively arranged on the top surface and the bottom surface opposite to the shell.
3. The drawing apparatus for flash spinning a tow web according to claim 2, wherein: the drainage chamber is positioned above the expansion chamber, and gradually narrows from the fiber inlet to the position where the drainage chamber is communicated with the expansion chamber; the expansion chamber is gradually enlarged from the place where the expansion chamber communicates with the drainage chamber to the fiber outlet.
4. The drawing apparatus for flash spinning a tow web according to claim 2, wherein: the deflection inner wall is arranged at the communication position of the drainage chamber and the expansion chamber, and the deflection inner wall is arranged towards the fiber outlet.
5. The drawing apparatus for flash spinning a tow web according to claim 2, wherein: the gas channel comprises an annular high-pressure airflow chamber which is communicated with the drainage expansion mechanism; the communication part of the drainage chamber and the expansion chamber is communicated with the annular high-pressure airflow chamber through an annular gap.
6. The drawing apparatus for flash spinning a tow web according to claim 5, wherein: the annular gap is provided at the deflecting inner wall.
7. The drawing apparatus for flash spinning a tow web according to claim 5, wherein: the gas channel also comprises a compressed gas inlet arranged on the side surface of the shell, the annular high-pressure airflow chamber is also communicated with the compressed gas inlet, and at least one compressed gas inlet is arranged.
8. The drawing apparatus for flash spinning a tow web according to claim 7, wherein: drawing gas enters the drawing device through the compressed gas inlet, and the temperature of the drawing gas is higher than the melting point temperature of the tow net; the temperature of the drawing gas is 100-200 ℃; the pressure of the drafting gas is 6-10 MPa.
9. A flash spinning apparatus, characterized by: comprising at least one drawing device disposed below the deflector, said drawing device employing the flash spun web of filaments of any of claims 1-8.
10. The flash spinning apparatus of claim 9, wherein: the drafting device accelerates the tow web by 10-30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111433248.3A CN114150439A (en) | 2021-11-29 | 2021-11-29 | Drawing device of flash spinning tow net and flash spinning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111433248.3A CN114150439A (en) | 2021-11-29 | 2021-11-29 | Drawing device of flash spinning tow net and flash spinning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114150439A true CN114150439A (en) | 2022-03-08 |
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Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6117801A (en) * | 1997-03-27 | 2000-09-12 | E. I. Du Pont De Nemours And Company | Properties for flash-spun products |
| CN1395630A (en) * | 2000-01-20 | 2003-02-05 | 纳幕尔杜邦公司 | Method for high-speed spinning of bicomponent fibers |
| US20060135020A1 (en) * | 2004-12-17 | 2006-06-22 | Weinberg Mark G | Flash spun web containing sub-micron filaments and process for forming same |
| US20070090555A1 (en) * | 2003-05-16 | 2007-04-26 | Henning Roettger | Method and apparatus for producing spunbonded fabrics of filaments |
| CN101173374A (en) * | 2007-11-26 | 2008-05-07 | 天津工业大学 | Device and method for flash evaporation textile of superfine fibre |
| CN101636532A (en) * | 2007-03-19 | 2010-01-27 | 金伯利-克拉克环球有限公司 | Come the method and apparatus of augmentor fiber bundle dispersion with the fiber wire drawing unit of dispersing |
| CN101876089A (en) * | 2010-07-21 | 2010-11-03 | 天津工业大学 | Flash spinning equipment |
| US20140121622A1 (en) * | 2012-10-31 | 2014-05-01 | Kimberly-Clark Worldwide, Inc. | Filaments Comprising Microfibrillar Cellulose, Fibrous Nonwoven Webs and Process for Making the Same |
| CN104073897A (en) * | 2014-07-04 | 2014-10-01 | 南通丽洋新材料开发有限公司 | Throat-tube type cold-wind-drafted and melt micro-fibre spinning device |
| CN105442069A (en) * | 2015-12-10 | 2016-03-30 | 天津工业大学 | Flash spinning device |
| US20160138197A1 (en) * | 2014-06-18 | 2016-05-19 | E I Du Pont De Nemours And Company | Flash Spun Plexifilamentary Strands and Sheets |
| CN106574401A (en) * | 2015-06-18 | 2017-04-19 | 纳幕尔杜邦公司 | Flash spun plexifilamentary strands and sheets |
| CN106794660A (en) * | 2014-06-18 | 2017-05-31 | 纳幕尔杜邦公司 | Clump thread sheet material |
| CN107447270A (en) * | 2017-08-31 | 2017-12-08 | 中安信科技有限公司 | A kind of polyacrylonitrile fibril for carbon fiber production pressurize steam pipe type drafting system and method |
| CN107740198A (en) * | 2017-09-08 | 2018-02-27 | 厦门当盛新材料有限公司 | A kind of flash spinning equipment and its spinning process |
| CN109385677A (en) * | 2018-12-03 | 2019-02-26 | 厦门当盛新材料有限公司 | A kind of super high-speed spinning equipment and spinning process using flash method |
| CN111691060A (en) * | 2020-06-10 | 2020-09-22 | 东华大学 | High polymer fiber based on instantaneous pressure-release spinning method, and preparation method and application thereof |
| CN111826733A (en) * | 2020-07-24 | 2020-10-27 | 福建闽瑞新合纤股份有限公司 | Flexible antibacterial composite fiber flash evaporation system and flash evaporation method |
| CN112226827A (en) * | 2020-10-22 | 2021-01-15 | 江苏科来材料科技有限公司 | Venturi spinning die head, venturi nozzle and method for preparing micron fibers by using venturi nozzle |
-
2021
- 2021-11-29 CN CN202111433248.3A patent/CN114150439A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6117801A (en) * | 1997-03-27 | 2000-09-12 | E. I. Du Pont De Nemours And Company | Properties for flash-spun products |
| CN1395630A (en) * | 2000-01-20 | 2003-02-05 | 纳幕尔杜邦公司 | Method for high-speed spinning of bicomponent fibers |
| US20070090555A1 (en) * | 2003-05-16 | 2007-04-26 | Henning Roettger | Method and apparatus for producing spunbonded fabrics of filaments |
| US20060135020A1 (en) * | 2004-12-17 | 2006-06-22 | Weinberg Mark G | Flash spun web containing sub-micron filaments and process for forming same |
| CN101636532A (en) * | 2007-03-19 | 2010-01-27 | 金伯利-克拉克环球有限公司 | Come the method and apparatus of augmentor fiber bundle dispersion with the fiber wire drawing unit of dispersing |
| CN101173374A (en) * | 2007-11-26 | 2008-05-07 | 天津工业大学 | Device and method for flash evaporation textile of superfine fibre |
| CN101876089A (en) * | 2010-07-21 | 2010-11-03 | 天津工业大学 | Flash spinning equipment |
| US20140121622A1 (en) * | 2012-10-31 | 2014-05-01 | Kimberly-Clark Worldwide, Inc. | Filaments Comprising Microfibrillar Cellulose, Fibrous Nonwoven Webs and Process for Making the Same |
| CN106794660A (en) * | 2014-06-18 | 2017-05-31 | 纳幕尔杜邦公司 | Clump thread sheet material |
| US20160138197A1 (en) * | 2014-06-18 | 2016-05-19 | E I Du Pont De Nemours And Company | Flash Spun Plexifilamentary Strands and Sheets |
| CN104073897A (en) * | 2014-07-04 | 2014-10-01 | 南通丽洋新材料开发有限公司 | Throat-tube type cold-wind-drafted and melt micro-fibre spinning device |
| CN106574401A (en) * | 2015-06-18 | 2017-04-19 | 纳幕尔杜邦公司 | Flash spun plexifilamentary strands and sheets |
| CN105442069A (en) * | 2015-12-10 | 2016-03-30 | 天津工业大学 | Flash spinning device |
| CN107447270A (en) * | 2017-08-31 | 2017-12-08 | 中安信科技有限公司 | A kind of polyacrylonitrile fibril for carbon fiber production pressurize steam pipe type drafting system and method |
| CN107740198A (en) * | 2017-09-08 | 2018-02-27 | 厦门当盛新材料有限公司 | A kind of flash spinning equipment and its spinning process |
| CN109385677A (en) * | 2018-12-03 | 2019-02-26 | 厦门当盛新材料有限公司 | A kind of super high-speed spinning equipment and spinning process using flash method |
| CN111691060A (en) * | 2020-06-10 | 2020-09-22 | 东华大学 | High polymer fiber based on instantaneous pressure-release spinning method, and preparation method and application thereof |
| CN111826733A (en) * | 2020-07-24 | 2020-10-27 | 福建闽瑞新合纤股份有限公司 | Flexible antibacterial composite fiber flash evaporation system and flash evaporation method |
| CN112226827A (en) * | 2020-10-22 | 2021-01-15 | 江苏科来材料科技有限公司 | Venturi spinning die head, venturi nozzle and method for preparing micron fibers by using venturi nozzle |
Non-Patent Citations (4)
| Title |
|---|
| J. S.鲁宾逊: "《化学纤维纺制与加工的新进展》", 31 July 1986, 纺织工业出版社 * |
| 刘淑强: "《化学纤维设备》", 31 October 2019, 东华大学出版社 * |
| 李磊等: "《聚乙烯瞬时释压纺丝法无纺布制备及其性能研究》", 《中国塑料》 * |
| 言宏元: "《非织造工艺学》", 31 August 2000, 中国纺织出版社 * |
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