CN104651959A - Spinneret plate for producing diacetate fiber tows - Google Patents
Spinneret plate for producing diacetate fiber tows Download PDFInfo
- Publication number
- CN104651959A CN104651959A CN201310586435.4A CN201310586435A CN104651959A CN 104651959 A CN104651959 A CN 104651959A CN 201310586435 A CN201310586435 A CN 201310586435A CN 104651959 A CN104651959 A CN 104651959A
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- China
- Prior art keywords
- spinneret orifice
- circumference
- spinnerets
- spinneret
- cellulose tow
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Classifications
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- 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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a spinneret plate for producing diacetate fiber tows. The spinneret plate comprises a spinneret plate body, a plurality of regular triangle spinneret holes with the same size are formed in the spinneret plate body, gravity centers of all the spinneret holes are positioned on the circumferences of a plurality of coplanar concentric circles, the distance between the gravity centers of every two adjacent spinneret holes on each circumference is marked as the circumferential distance of the spinneret holes, the circumferential distances of the spinneret holes on the same circumference are equal, and the distance between two adjacent circumferences is progressively increased from inside to outside. By the mode, the sizes and the distribution distances of the spinneret holes are determined according to the sizes of the diacetate fiber tows needing production, the spinneret plate is simple in structure and reasonable in layout, the extruded diacetate fiber tows are closer to 'Y' shapes, and flue gas filtering performance is improved.
Description
Technical field
The present invention relates to spinning device tool design field, particularly relate to a kind of spinnerets for the production of Diacetate cellulose tow.
Background technology
In recent years, the modification of synthetic fiber, R and D enter the new stage, and thin dawn, high-performance, Multifucntional synthetic fiber emerge in an endless stream, and obtain good application in different fields.But the performance difference of the synthetic fiber spun out is comparatively large, and the shape of spinnerets and specification are the critical components ensureing that can fibre property and spinning process carry out smoothly.
Diacetate cellulose tow is conventional smoke filtration synthetic fiber, in its industrial processes, entry-end effect can be produced during cellulose diacetate spinning solution press-in spinneret orifice, portion of energy consumes in the deformation of solution, the conformation of macromolecular chain there occurs change, and saving as elastic energy of deformation, this elastic deformation returns to original state needs the regular hour.And spinning solution flows through the time of spinneret orifice much smaller than slack time, so spinning solution does not return to original state before entering path completely, create extrusion swelling phenomenon at spinneret orifice mouth on the contrary, easily cause spinning solution sticky also, affect spinning process and tow quality.Therefore, the design of the distance between spinneret orifice is particularly important.
In process of production, after spinneret orifice extrudes Diacetate cellulose tow, Diacetate cellulose tow is subject to the effect of hot-air in path, solvent in thread volatilizees gradually and is frozen into tow, and the speed of outside solvent evaporates is apparently higher than inner side, therefore can there is deformation and form " Y " shape, shape of spinneret for spinning Diacetate cellulose tow mainly contains circle, rectangle, cross, trilobal etc., the shape of cross section of the Diacetate cellulose tow that the spinneret orifice of these shapes is extruded is lower with " Y " shape degree of approach, bad for filter effect during smoke filtration, therefore, the shape of existing spinneret orifice can not adaption demand.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of spinnerets for the production of Diacetate cellulose tow, the present invention is according to the size and the distribution distance that need the size of the production Diacetate cellulose tow produced to determine described spinneret orifice, described spinneret orifice adopts equilateral triangle, structure is simple, rationally distributed, the Diacetate cellulose tow extruded, closer to " Y " shape, improves smoke filtration performance, and can prevent adjacent spinneret orifice place spinning solution thread from occurring sticky also phenomenon.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of spinnerets for the production of Diacetate cellulose tow, comprise spinnerette body, described spinnerette body is provided with the identical spinneret orifice of several sizes, described spinneret orifice is equilateral triangle, the center of gravity of all described spinneret orifices is all positioned at that several are coplanar circumferentially concentrically ringed, distance between the center of gravity of often adjacent two described spinneret orifices circumferentially described in each is designated as spinneret orifice circumference spacing, described in same circumferentially spinneret orifice circumference spacing equal, distance between adjacent two described circumference increases progressively from inside to outside successively.
In a preferred embodiment of the present invention, described spinnerets is circular, and the described coplanar concentrically ringed center of circle is positioned at perpendicular to described spinnerets and passes on the straight line at the center of described spinnerets.
In a preferred embodiment of the present invention, the quantity of described spinneret orifice is less than or equal to 375, and the length of side of described spinneret orifice is 54um.
In a preferred embodiment of the present invention, described spinneret orifice circumference spacing is determined by the cross section size of Diacetate cellulose tow, after Diacetate cellulose tow is extruded from spinneret orifice, described in same, circumferentially often there is certain distance between adjacent two described Diacetate cellulose tow.
In a preferred embodiment of the present invention, Diacetate cellulose tow described in each is die swell ratio relative to the cross-sectional area ratio of described spinneret orifice, and the computational methods of described die swell ratio are:
Obtained by mathematics second-kind surface integral theoretical formula:
Velocity vector
,
Flow
,
Wherein, described in be followed successively by the unit vector of speed V in X-axis, Y-axis, Z-direction,, be followed successively by the vector function of speed V in X-axis, Y-axis, Z-direction, wherein Z axis is perpendicular to the cross section of described spinneret orifice;
Adopt calculus, described flow Q the curved surface of process
be positioned on Z=0, Z-axis direction amount is 0, curved surface
normal vector and the forward angle of Z axis be 0, therefore dz=0,
Q==is wherein curved surface
projection on Z=0 face,
Because described spinneret orifice is equilateral triangle, obtain:
Pressure=, release, wherein, x is the length of described spinneret orifice along X-direction, and y is the length of described spinneret orifice along Y direction,
Obtained by Hydrodynamics Theory formula:
=, therefore, obtain,
，，
Die swell ratio
,
,
,
,
Wherein, n is non-newtonian index,
for elastic deformation,
for average shear stress, being can modulus, G " be loss modulus, G is storage modulus and loss modulus and value,
for angular frequency, a is the equilateral triangle spinneret orifice length of side, and t is shear time, wherein
for Pressure Drop, L is spinneret orifice thickness,
for spinning solution apparent viscosity;
for shear rate;
for velocity gradient.
In a preferred embodiment of the present invention, the computing formula of the spacing between adjacent two described circumference is: d=>=4.5, and wherein, d is the distance between m layer circumference and m-1 layer circumference, being the distance between m layer circumference and the center of circle, is the distance between ground floor circumference and the center of circle.
The invention has the beneficial effects as follows: the present invention is according to needing the size of the production Diacetate cellulose tow produced to determine size and the distribution distance of described spinneret orifice, described spinneret orifice adopts equilateral triangle, structure is simple, rationally distributed, the Diacetate cellulose tow extruded is closer to " Y " shape, improve smoke filtration performance, and can prevent adjacent spinneret orifice place spinning solution thread from occurring sticky also phenomenon.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the schematic diagram of Celluloseacetate cigarette filter tow forming process of the present invention;
Fig. 2 is the structural representation of spinnerets one of the present invention preferred embodiment.
In accompanying drawing, the mark of each parts is as follows: 1, spinnerette body; 2, spinneret orifice; 3, circumference.
Detailed description of the invention
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A kind of spinnerets for the production of Diacetate cellulose tow, comprise spinnerette body 1, described spinnerette body 1 is provided with the identical spinneret orifice of several sizes 2, described spinneret orifice 2 is equilateral triangle, the center of gravity of all described spinneret orifices 2 is all positioned on several coplanar concentrically ringed circumference 3, distance between the center of gravity of often adjacent two the described spinneret orifices 2 on circumference 3 described in each is designated as the circumferential spacing of spinneret orifice 2, the circumferential spacing of spinneret orifice 2 on same described circumference 3 is equal, and the distance between adjacent two described circumference 3 increases progressively from inside to outside successively.
Because described spinneret orifice 2 is equilateral triangle, three limit solvent evaporates of the Diacetate cellulose tow that spinneret orifice 2 is extruded comparatively fast inwardly are shunk, and as shown in Figure 1, shape is closer to " Y " shape.
Wherein, described spinnerets is circular, and the described coplanar concentrically ringed center of circle is positioned at perpendicular to described spinnerets and passes on the straight line at the center of described spinnerets.The circumferential spacing of described spinneret orifice 2 is determined by the cross section size of Diacetate cellulose tow, after Diacetate cellulose tow is extruded from spinneret orifice 2, same described circumference 3 often has certain distance between adjacent two described Diacetate cellulose tow.
The present invention adopts different quality mark and different temperatures diacetate fiber spinning liquid to recommend to the circumferential spacing and ring layer that design each spinneret orifice of concentric circles 2 in the extrusion swelling phenomenon of spinneret orifice 2 mouthfuls.Adopt the spinnerets of different size equilateral triangle spinneret orifice 2 to carry out spinning, find the physical property Changing Pattern design ring layer spacing of two acetate tow.
In the present embodiment, the mass fraction of described diacetate fiber spinning solution is 26%-29%, and temperature is 55 DEG C-63 DEG C, and the quantity of described spinneret orifice 2 is less than or equal to 375, and the length of side of described spinneret orifice 2 is 54um.According to the die swell ratio calculated, determine that the circumferential spacing of described spinneret orifice 2 is not less than 112.2 μm, adjacent turn interlamellar spacing increases progressively with the spacing being not less than 9mm.
Diacetate cellulose tow described in each is die swell ratio relative to the cross-sectional area ratio of described spinneret orifice 2, and the computational methods of described die swell ratio are:
Obtained by mathematics second-kind surface integral theoretical formula:
Velocity vector
,
Flow
,
Wherein, described in be followed successively by the unit vector of speed V in X-axis, Y-axis, Z-direction,, be followed successively by the vector function of speed V in X-axis, Y-axis, Z-direction, wherein Z axis is perpendicular to the cross section of described spinneret orifice 2;
Adopt calculus, described flow Q the curved surface of process
be positioned on Z=0, Z-axis direction amount is 0, curved surface
normal vector and the forward angle of Z axis be 0, therefore dz=0,
Q==is wherein curved surface
projection on Z=0 face,
Because described spinneret orifice 2 is equilateral triangle, obtain:
Pressure=, release, wherein, x is the length of described spinneret orifice 2 along X-direction, and y is the length of described spinneret orifice 2 along Y direction,
Obtained by Hydrodynamics Theory formula:
=, therefore, obtain,
，，
Die swell ratio
,
,
,
,
Wherein, n is non-newtonian index,
for elastic deformation,
for average shear stress, being can modulus, G " be loss modulus, G is storage modulus and loss modulus and value,
for angular frequency, a is equilateral triangle spinneret orifice 2 length of side, and t is shear time, wherein
for Pressure Drop, L is spinneret orifice 2 thickness,
for spinning solution apparent viscosity;
for shear rate;
for velocity gradient.
In the present invention, the computing formula of the spacing between adjacent two described circumference 3 is: d=>=4.5, and wherein, d is the distance between m layer circumference 3 and m-1 layer circumference 3, being the distance between m layer circumference 3 and the center of circle, is the distance between ground floor circumference 3 and the center of circle.
The present invention is according to the size and the distribution distance that need the size of the production Diacetate cellulose tow produced to determine described spinneret orifice 2, described spinneret orifice 2 adopts equilateral triangle, structure is simple, rationally distributed, the Diacetate cellulose tow extruded is closer to " Y " shape, improve smoke filtration performance, and can prevent adjacent spinneret orifice 2 place spinning solution thread from occurring sticky also phenomenon.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. the spinnerets for the production of Diacetate cellulose tow, it is characterized in that, comprise spinnerette body (1), described spinnerette body is provided with the identical spinneret orifice of several sizes, described spinneret orifice (2) is equilateral triangle, the center of gravity of all described spinneret orifices is all positioned on several coplanar concentrically ringed circumference (3), distance between the center of gravity of often adjacent two described spinneret orifices circumferentially described in each is designated as spinneret orifice circumference spacing, described in same circumferentially spinneret orifice circumference spacing equal, distance between adjacent two described circumference increases progressively from inside to outside successively.
2. the spinnerets for the production of Diacetate cellulose tow according to claim 1, is characterized in that, described spinnerets is circular, and the described coplanar concentrically ringed center of circle is positioned at perpendicular to described spinnerets and passes on the straight line at the center of described spinnerets.
3. the spinnerets for the production of Diacetate cellulose tow according to claim 1, is characterized in that, the quantity of described spinneret orifice is less than or equal to 375, and the length of side of described spinneret orifice is 54um.
4. the spinnerets for the production of Diacetate cellulose tow according to claim 1, it is characterized in that, described spinneret orifice circumference spacing is determined by the cross section size of Diacetate cellulose tow, after Diacetate cellulose tow is extruded from spinneret orifice, described in same, circumferentially often there is certain distance between adjacent two described Diacetate cellulose tow.
5. the spinnerets for the production of Diacetate cellulose tow according to claim 4, is characterized in that, Diacetate cellulose tow described in each is die swell ratio relative to the cross-sectional area ratio of described spinneret orifice, and the computational methods of described die swell ratio are:
Obtained by mathematics second-kind surface integral theoretical formula:
Velocity vector
,
Flow
,
Wherein, described in be followed successively by the unit vector of speed V in X-axis, Y-axis, Z-direction,, be followed successively by the vector function of speed V in X-axis, Y-axis, Z-direction, wherein Z axis is perpendicular to the cross section of described spinneret orifice;
Adopt calculus, described flow Q the curved surface of process
be positioned on Z=0, Z-axis direction amount is 0, curved surface
normal vector and the forward angle of Z axis be 0, therefore dz=0,
Q==is wherein curved surface
projection on Z=0 face,
Because described spinneret orifice is equilateral triangle, obtain:
Pressure=, release, wherein, x is the length of described spinneret orifice along X-direction, and y is the length of described spinneret orifice along Y direction,
Obtained by Hydrodynamics Theory formula:
=, therefore, obtain,
，，
Die swell ratio
,
,
,
,
Wherein, n is non-newtonian index,
for elastic deformation,
for average shear stress, being can modulus, G " be loss modulus, G is storage modulus and loss modulus and value,
for angular frequency, a is the equilateral triangle spinneret orifice length of side, and t is shear time, wherein
for Pressure Drop, L is spinneret orifice thickness,
for spinning solution apparent viscosity;
for shear rate;
for velocity gradient.
6. the spinnerets for the production of Diacetate cellulose tow according to claim 1, it is characterized in that, the computing formula of the spacing between adjacent two described circumference is: d=>=4.5, wherein, d is the distance between m layer circumference and m-1 layer circumference, being the distance between m layer circumference and the center of circle, is the distance between ground floor circumference and the center of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586435.4A CN104651959A (en) | 2013-11-21 | 2013-11-21 | Spinneret plate for producing diacetate fiber tows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586435.4A CN104651959A (en) | 2013-11-21 | 2013-11-21 | Spinneret plate for producing diacetate fiber tows |
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| Publication Number | Publication Date |
|---|---|
| CN104651959A true CN104651959A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310586435.4A Pending CN104651959A (en) | 2013-11-21 | 2013-11-21 | Spinneret plate for producing diacetate fiber tows |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134012A (en) * | 1983-12-21 | 1985-07-17 | Mitsubishi Rayon Co Ltd | Spinneret for spinning acetate fiber having y-shaped cross-section |
| CN2517759Y (en) * | 2001-12-11 | 2002-10-23 | 上海第十化学纤维厂 | Finspun positive triangle shape Dacron short fiber spinneret plate |
| CN201254622Y (en) * | 2008-06-05 | 2009-06-10 | 江苏盛虹化纤有限公司 | Spinneret for producing imitated real silk terylene products |
| CN201864813U (en) * | 2010-11-12 | 2011-06-15 | 江苏华亚化纤有限公司 | Triangular profile spinneret plate |
| CN202284234U (en) * | 2011-10-26 | 2012-06-27 | 江苏华亚化纤有限公司 | Fine denier triangular profiled spinneret plate |
-
2013
- 2013-11-21 CN CN201310586435.4A patent/CN104651959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134012A (en) * | 1983-12-21 | 1985-07-17 | Mitsubishi Rayon Co Ltd | Spinneret for spinning acetate fiber having y-shaped cross-section |
| CN2517759Y (en) * | 2001-12-11 | 2002-10-23 | 上海第十化学纤维厂 | Finspun positive triangle shape Dacron short fiber spinneret plate |
| CN201254622Y (en) * | 2008-06-05 | 2009-06-10 | 江苏盛虹化纤有限公司 | Spinneret for producing imitated real silk terylene products |
| CN201864813U (en) * | 2010-11-12 | 2011-06-15 | 江苏华亚化纤有限公司 | Triangular profile spinneret plate |
| CN202284234U (en) * | 2011-10-26 | 2012-06-27 | 江苏华亚化纤有限公司 | Fine denier triangular profiled spinneret plate |
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Application publication date: 20150527 |
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| RJ01 | Rejection of invention patent application after publication |