CN100374631C - Reducing thermotube and spinning device and method using the same - Google Patents
Reducing thermotube and spinning device and method using the same Download PDFInfo
- Publication number
- CN100374631C CN100374631C CNB991200004A CN99120000A CN100374631C CN 100374631 C CN100374631 C CN 100374631C CN B991200004 A CNB991200004 A CN B991200004A CN 99120000 A CN99120000 A CN 99120000A CN 100374631 C CN100374631 C CN 100374631C
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat pipe
- spinning
- heating
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The present invention relates to a reducing heat pipe for spinning synthetic fibers, a spinning device thereof and a sinning method. The reducing heat pipe is provided with various changeable curves on the inner wall of the pipe, different temperatures are applied to three areas of the heat pipe, different air flow fields and temperature fields can be formed at the spinning speed of 2000 to 8000 m/second, and stress induced crystallization and thermal crystallization occur in filaments under the action of tension and heat. Thereby, various synthetic fiber filaments or multifilaments from fine denier to coarse denier are prepared. The synthetic fiber filaments have the advantages of excellent dyeing uniformity, good intensity and good extension. The reducing heat pipe and the spinning device thereof have the advantage of low energy consumption. The spinning method has the advantages of short flow path, easy operation and low cost.
Description
Technical Field
The present invention relates to a novel spinning apparatus and a spinning method for synthetic fiber production, and more particularly, to a novel variable diameter heat pipe for synthetic fiber production, a spinning apparatus and a spinning method using the heat pipe.
Background
Conventionally, in order to spin synthetic fibers such as filaments having an optimally oriented macromolecular crystal structure, a conventional FDY (Full draw Yarn) Yarn, also called "fully Drawn Yarn", has been Drawn by artificially drawing a tow with two drawing rolls. For example, the chinese patent application having the application number of "96101385", which is a "method for producing multifilament" by bamag gmbh, germany, and the like, uses one or two pairs of heated drawing rolls to draw a bundle of filaments. However, the method is not ideal for controlling the 'crystalline region' and the 'amorphous region' in the macromolecular structure of the fiber. Further, since the two-step process for producing polyester filaments generally has disadvantages such as high cost and insufficient post-processing ability, research on the one-step process for producing synthetic fiber filaments such as polyester has been conducted for nearly two or thirty years. The most important basic spinning process comprises the following steps: the spinning speed is more than 4000 m/min, and the stretching and the shaping are simultaneously carried out in a heating pipe.
The key of the heat pipe spinning method is the heat pipe spinning device which stretches and heats through the heat pipe. The heat pipe is typically a tubular device having an elongated channel with one or more heating temperature zones disposed therein. The heat pipe spinning method is that after the synthetic fiber melt is extruded from a spinning head, the melt is initially cooled through a side blowing window and enters a heat pipe device arranged between the downstream of the side blowing window and a winding part, and the synthetic fiber yarn initially cooled through the side blowing window is stretched and heated (shaped) in different temperature areas in a heat pipe to obtain the required fiber macromolecular structure.
For example, the chinese patent application having the application number "89103411" and the name "spinning apparatus" of bamag corporation, germany, discloses a spinning apparatus in which a bundle of synthetic fibers exiting from a spinneret is first cooled and then drawn out at a filament speed of 4500 m/min or more. The advancing synthetic fiber strand is then heated again in a heating tube. The heating tube can be moved and positioned on the guide along the stroke of the wire. Thereby, the yielding process of the synthetic fiber bundle is always allowed to take place at a suitable temperature in the heating tube.
For another example, bamag in germany has also produced a TCS heat pipe for TCS process, however, the apparatus has high energy consumption (biphenyl heating, 0.5 KW/bundle filament), heavy weight (heat pipe with heat box weighing 1.5 ton), and requires 14Kg high pressure suction gun for spinning; in addition, the spinning speed is required to be more than 4000 m/min, the process still comprises the steps of cooling and heating, and the elongation is not easy to be controlled below 30%.
For another example, chinese patent application entitled "an apparatus for spinning synthetic fusible spun polymer" filed by howster rayon of the united states of america as "91103046.8" discloses a spinning apparatus for spinning synthetic fusible spun polymer, the spinning apparatus mainly comprising: a spinning case; a long heat-insulating tube with a length of more than 5m and two end points, wherein one end of the tube is connected with the spinning beam; a means for reducing turbulence secured within the second end of the tube; a means for gathering the fibers is secured adjacent the second end of the tube.
The problems with the above-described similar processes are: the required spinning (winding) speed is more than 4000 m/min; in the mechanism and process of spinning and forming, cooling is firstly carried out on a spinning line to complete the spinning process of Partially Oriented Yarn (POY), and then heating and drawing are carried out to obtain fully drawn yarn. Thus, the spinning method or investment is large, and the spinning is difficult; or the application range is limited; or the elongation of the filament is difficult to control in the spinning process, and the filament is difficult to popularize. In addition, although the heat pipe can be made into heating zones with different temperature sections, the tension and the temperature field change of the spinning in the heat pipe cannot be freely adjusted; thus, the desired optimum fiber structure and properties cannot be changed and obtained; it is not possible to obtain filaments and multifilaments having various properties and styles. In addition, the fiber filaments obtained by high-speed spinning at a speed of 3000 to 4000 m/min are partially oriented (Pre-oriented) filaments (POY).
Meanwhile, the prior art still has the problems of poor anti-interference performance, easy uneven yarn levelness, narrow variety range and unstable spinning in the spinning process.
To this end, the chinese patent application entitled "high speed one step Spinning process and apparatus of polyester fully drawn yarn" and its sn kes heat pipe "filed by wujialin et al, the university of textile china, application number" 96104116 "discloses a Spinning process and apparatus of polyester fiber, a high speed, one step Spinning process and apparatus of polyester filament FSY (fully drawn yarn), and a heat pipe-Stress Induced oriented crystal Spinning (SICS, sn kes) heat pipe used in the apparatus.
By arranging a stress-induced oriented crystal spinning heat pipe (SICS) heat pipe for short at the side of a side blowing window below a spinneret plate, the invention can enable a randomly oriented macromolecular network in the fiber to be oriented and crystallized in one step under the critical non-equilibrium phase change condition at a high temperature to complete the main working procedure of one-step spinning, and the fully-stretched polyester yarn with wide denier range, large strength and excellent dyeing property is prepared.
However, the above-mentioned sn kes heat pipe and its spinning device and process still cannot freely adjust the tension of spinning in the heat pipe and the change of temperature field, thereby changing and obtaining the required optimum structure and properties of fiber, and obtaining various filaments and multifilaments with different properties and styles. In addition, in order to obtain uniform spinning stress, the spinning device of Wujialin and the like also uses a plurality of expensive sapphires and ruby, so that the processing operation and the tow performance are easily influenced, and the manufacturing cost is obviously increased.
The inventor finds that: in the high temperature state, when the filament passes through the heat pipe, the filament is in tension and in a heated state. The tension causes the internal stress of the filament to generate stress-induced oriented crystallization, and the heated result generates thermotropic crystallization. The curve of the inner wall of the heat pipe, namely the diameter of the cross section circle, is designed, so that the air flow field in the heat pipe can be changed, the acting force on the wire is changed, the stress is changed, and the position and the crystallinity of the crystallization point of the stress-induced oriented crystallization are also changed. Meanwhile, the variable diameter curves are different, and the radiation heat received by the variable diameter curves is also different. Changing the heating temperature of the heat pipe is also another effective way to create differences in the properties of the tow passing through the heat pipe. When the filament bundle reaches a certain winding speed at a certain temperature, pre-oriented yarn (POY) can be formed, and further the winding speed is increased, so that fully oriented yarn (FDY) can be formed. The spun silk is heated uniformly, has excellent dyeing performance, and forms products with different performances and styles.
After research, the inventor finds that: the multi-diameter variable heat pipe is used for carrying out same-plate different spinning, the curve diameter and the heating temperature of the inner wall of each pipe are designed to be different, multifilament consisting of monofilaments with different shrinkage, crystallinity and dyeing property can be formed, and the variety of the heat pipe spinning is expanded. Thus, the present invention has been completed.
Disclosure of Invention
One of the objects of the present invention is: providing a reducing heat pipe for spinning synthetic fibers; the reducing heat pipe has various changing pipe inner wall curves, different sections of the heat pipe are respectively applied with different ranges of temperature, different air flow fields and temperature fields can be formed at the spinning speed of 2000-8000 m/min, especially 3000-6000 m/min, and stress induced crystallization and thermal induced crystallization are generated in the filament under the action of tension and heat; thus, the crystallization point and the crystallinity of the yarn are adjusted, and any polyester yarn from fine denier to coarse denier (20 dtex-300 dtex/yarn, 0.4-6 dtex/single fiber) is prepared. The polyester yarn has excellent dyeing uniformity, dyeability, strength and elongation.
It is still another object of the present invention to provide a spinning apparatus for producing synthetic fibers, which employs one or more variable diameter heat pipes, and can form different air flow fields and temperature fields at a spinning speed of 2000 to 8000 m/min, particularly 3000 to 6000 m/min by applying different inner wall curves and temperatures to the two or more variable diameter heat pipes; under the action of tension and heat, the interior of the filament is subjected to stress-induced crystallization and thermotropic crystallization; thus, by adjusting the crystallization point and crystallinity of the yarn, a multifilament yarn excellent in dyeing uniformity, dyeability, strength and elongation from fine denier to coarse denier (20 dtex to 300dtex per yarn, 0.4 to 6dtex per single fiber) was obtained. The multifilament consists of monofilaments having various shrinkage, crystallinity and dyeing properties.
Another object of the present invention is to provide a spinning method for producing synthetic fibers, wherein the spinning method uses one or more heat pipes with variable diameters, and by applying a uniform curve and temperature to the inner wall of the heat pipe with variable diameters, air flow fields and temperature fields different from each other can be formed at a spinning speed of 2000-8000 m/min, especially 3000-6000 m/min, and stress-induced crystallization and thermal crystallization occur inside the filaments under the action of tension and heat; thus, by adjusting the crystallization point and crystallinity of the yarn, a multifilament yarn excellent in dyeing uniformity, dyeability, strength and elongation can be obtained from fine denier to coarse denier (20 dtex to 300dtex per yarn, 0.4 to 6dtex per single fiber). The multifilament consists of monofilaments with various properties such as shrinkage, crystallinity and dyeing properties. Thus, the variety of the heat pipe spinning of the synthetic fiber is expanded.
The reducing heat pipe and the spinning device using the same have the advantages of simple design and manufacture, low energy consumption and convenient maintenance; can be suitable for various occasions; the spinning process flow for manufacturing the synthetic fiber filament by adopting the spinning method of the variable-diameter heat pipe and the spinning device is short and easy to operate; low cost, and can spin various synthetic fiber yarns from fine denier to coarse denier.
The reducing heat pipe structure of the invention is as follows:
a heating pipe with a fiber drawing channel in the middle and a heating layer and a heat insulating layer on the pipe wall, wherein the longitudinal section curve of the inner wall of the pipe, namely the inner diameter of the cross section circle of the pipe, can be changed.
The reducing heat pipe is a metal heating pipe with the length of 1.0-2.5 m, the outer diameter phi of 3.0-6.0 cm and the inner diameter phi of 1.5-5.0 mm.
Preferably, the reducing heat pipe of the invention has the length of 1.5 to 2.5m, the external diameter phi of 4.0 to 5.0cm and the internal diameter phi of 2.5 to 4.5mm.
In order to obtain a fiber filament with uniform heating and excellent dyeing property, the longitudinal section curve of the inner wall of the reducing heat pipe is preferably an inward (convex) bent hyperbolic curve, and the inner diameter dimension of the reducing heat pipe is within the range of phi 2.5-4.5 mm.
In order to obtain fiber filaments with uniform heating and excellent dyeing property, the longitudinal section curve of the inner wall of the reducing heat pipe is preferably in an outward (convex) bending hyperbolic curve type, and the inner diameter dimension of the reducing heat pipe is phi 2.5-4.5 mm.
In order to obtain a large denier filament yarn with uniform heating and excellent dyeing property, the longitudinal section curve of the inner wall of the variable diameter heat pipe is preferably in a parabolic shape which is bent inwards, and the inner diameter of the variable diameter heat pipe is in a range of phi 2.5-4.5 mm.
In order to obtain the synthetic fiber filament with high strength and low shrinkage, the longitudinal section curve of the inner wall of the reducing heat pipe is in a horn shape with two ends with different diameters, and the difference of the inner diameters of the two ends is within the range of 2.0-4.5 mm.
In order to obtain a large denier filament yarn with uniform heating and excellent dyeing property, it is preferable that the longitudinal section curve of the inner wall of the variable diameter heat pipe of the present invention is an outwardly curved parabola shape, and the inner diameter dimension thereof is within the range of phi 2.5-4.5 mm.
In order to obtain the high-shrinkage and excellent-performance three-different (different titer, different section and different shrinkage) fine-denier to coarse-denier fiber filament, the longitudinal section curve of the inner wall of the reducing heat pipe is preferably a reducing curve with more than two sections (namely, in a wave shape).
The spinning device adopting the reducing heat pipe comprises the following parts:
1. a spinneret; 2. a thread guide plate; 3. a variable diameter heat pipe; 4. and (4) a winding device.
The spinning device is characterized by comprising one or more than two reducing heat pipes and zero to two non-reducing heat pipes, wherein the reducing and non-reducing heat pipes are metal heating pipes with the length of 1.0 to 2.5m, the outer diameter phi of 3.0 to 6.0mm and the inner diameter phi of 2.0 to 5.0 mm.
In the spinning apparatus of the present invention using two or more of the above-described heat pipes, the temperature of the heat pipe is in a constant or variable temperature range of room temperature-260 ℃ divided into three heating temperature zones, in which at least one of the heat pipes is heated. The temperature ranges of the three sections are in an increasing relationship including a plateau phase to form a temperature field.
In particular, the heating heat pipe is in a constant or variable temperature range of 120-260 ℃ and divided into three heating temperature sections, so that a temperature field is formed.
The constant or variable temperature range of the room temperature to 260 ℃ divided into three heating temperature sections, wherein one or two heating temperature sections can be unheated, and the unheated temperature zone means that the temperature of the heat pipe is about 30 ℃.
In the case of a non-heated heat pipe, the temperature of the non-heated heat pipe is usually about 30 ℃ because the non-heated heat pipe is not heated but is affected by the surrounding heating atmosphere.
The constant or variable temperature range of 120-260 ℃ divided into three heating temperature zones is usually 120-200 ℃, 160-240 ℃ and 190-260 ℃, and the temperature ranges of the three zones are in an increasing relationship including a flattening stage so as to form a temperature field.
Preferably, the constant or variable temperature range of 120-260 ℃ divided into three heating temperature zones is generally 140-180 ℃, 160-220 ℃ and 200-240 ℃.
More preferably, the constant or variable temperature range of 120 to 260 ℃ divided into three heating temperature zones is generally 160 to 180 ℃,190 to 200 ℃ and 210 to 240 ℃.
The spinning method of the spinning device consisting of the variable-diameter heat pipes comprises the following steps:
1. extruding the molten polymer from the spinneret orifice, and performing primary cooling through a side blowing window;
2. the tows enter into more than two heating pipes respectively, wherein the circular inner diameter of the cross section of at least one pipe is changed, and when two heat pipes are used, the temperature of the heat pipes can be in the temperature range of at least one pipe to be heated and being in the constant or changing temperature range of room temperature to 260 ℃ and being divided into three heating temperature sections. The temperature ranges of the three sections are in an increasing relationship including a plateau phase to form a temperature field.
The moving strand silk completes stretching and oriented crystallization in one step in an air flow field and a temperature field formed in the heating pipe.
3. Oiling, screening, and winding at a winding speed of 2000-6000 m/min, especially 3000-6000 m/min to obtain the fully-stretched yarn.
In particular, the heating heat pipe is in a constant or variable temperature range of 120-260 ℃ and is divided into three heating temperature sections, so that a temperature field is formed.
The constant or variable temperature range between room temperature and 260 ℃ divided into three heating temperature zones, wherein one or two heating temperature zones can be unheated, and the unheated temperature zone means that the temperature of the heat pipe is 30 ℃.
In the case of a non-heating heat pipe, the temperature of the non-heating heat pipe is usually about 30 ℃ because of the influence of the surrounding heating atmosphere, although the non-heating heat pipe is not heated.
The constant or variable temperature range of 120-260 ℃ divided into three heating temperature zones is usually 120-200 ℃, 160-240 ℃ and 200-260 ℃, and the temperature ranges of the three zones are in an increasing relationship including a leveling stage so as to form a temperature field.
Preferably, in the spinning method of the present invention, the heat pipe heating temperature is three heating temperature zones of 140 to 180 ℃,160 to 220 ℃, and 200 to 240 ℃, and the winding speed of the filament is in the range of 3000 to 6000 m/min.
More preferably, in the spinning method of the present invention, the heating temperature of the heat pipe in the spinning device of the present invention is divided into three heating sections of 160 ℃ to 180 ℃,190 ℃ to 200 ℃, and 210 ℃ to 240 ℃.
Preferably, in the spinning method of the present invention, the heat pipe of the present invention has a length of 1.5 to 2.5m, an outer diameter of 4.0 to 5.0cm, and a minimum inner diameter of 2.0 to 3.0mm.
In order to obtain a fiber filament with uniform heating and excellent dyeing property, it is preferable that in the spinning method of the present invention, the longitudinal section curve of the inner wall of the variable diameter heat pipe of the present invention is an inwardly curved hyperbolic curve, and the inner diameter dimension thereof is within a range of phi 2.5 to 4.5cm.
In order to obtain a fiber filament with uniform heating and excellent dyeing property, it is preferable that in the spinning method of the present invention, the longitudinal section curve of the inner wall of the variable diameter heat pipe of the present invention is an outwardly curved hyperbolic curve, and the inner diameter dimension thereof is phi 2.5-4.5 cm.
In order to obtain a large denier filament yarn having uniform heating and excellent dyeing properties, it is preferable that in the spinning method of the present invention, the longitudinal section curve of the inner wall of the variable diameter heat pipe of the present invention is an inwardly curved parabola shape, and the inner diameter dimension thereof is in the range of phi 2.5-4.5 cm.
In order to obtain a large denier filament yarn having uniform heating and excellent dyeing properties, it is preferable that in the spinning method of the present invention, the longitudinal section curve of the inner wall of the variable diameter heat pipe of the present invention is an outwardly curved parabolic shape, and the inner diameter dimension thereof is in the range of phi 2.5 to 4.5cm.
In order to obtain high-strength and low-shrinkage fiber filaments, the longitudinal section curve of the inner wall of the variable-diameter heat pipe is in a horn shape with two ends with different diameters, and the difference of the inner diameters of the two ends is within the range of 2.0-4.5 cm.
In order to obtain a high-shrinkage and excellent-performance filament of three types (i.e., different fineness, different cross section and different shrinkage) of fine to coarse denier, it is preferable that the longitudinal cross section curve of the inner wall of the variable diameter heat pipe of the present invention is a variable diameter curve having two or more segments. In particular to winding at a winding speed of 3000-6000 m/min to obtain the fully-stretched yarn.
It is particularly preferred that in the spinning method of the present invention, the spinning apparatus of the present invention employs two heat pipes to spin the triisomultifilament.
In the spinning device of the reducing heat pipe, the heating sheet and the heating wire in each heat pipe are electrified and heated at the power of 5-75 w/piece, so that the temperature of the working area is kept in the range mentioned above.
The principle of the variable diameter heat pipe and the spinning using the same of the present invention is described below.
When each filament in the open filament bundle (i.e., the filament bundle in a non-bundled state) is operated in a heat pipe at a high speed, the surface of the filament bundle is in sufficient frictional contact with an air flow, and at this time, the greater the operating speed of the filament bundle, the greater the frictional force, and the greater the spinning tension. And adjusting the temperature field in the heat pipe to make the tow stress greater than the yield stress of the fiber. At this time, the draft ratio is adjusted to achieve the object of heating and draft.
The air flow field in the reducing heat pipe can be changed by changing the inner diameter of the pipe wall of the reducing heat pipe and adjusting the drafting speed, thereby changing the air friction resistance and the drafting point of the fiber in the heat pipe. Meanwhile, different temperature fields are obtained by utilizing the heating layer and the heat-insulating layer of the heat pipe, and a stable unbalanced system from input (a spray head) to output (winding and extraction) is formed.
From the above theory, the critical parameters in the steady-state region, i.e., the changes in temperature, stress, and relaxation time (i.e., the length of the heat pipe) are tightly controlled during the phase transition of the non-equilibrium (neck-down oriented crystallization) described above. In the invention, the heat exchange is completed by the reducing heat pipe.
First, see fig. 1. Fig. 1 is a schematic view illustrating the action of the air flow field in the reducing heat pipe according to the present invention.
1. Principle for adjusting stress of fiber in air flow field
According to the aerodynamic principle, one fiber has a diameter d F (radius r) F ) When the tube is running downwards in a heat pipe with variable diameter D (x) (radius R (x)), the radial velocity V of the air in the tube is obtained by laminar flow theory a (r, x) is as follows:
integrating r, we can get:
when R (x) becomes small, V a1 (r, x) is increased, and vice versa, is decreased;
when r becomes small, V a1 (r, x) is increased, and vice versa, is decreased;
r =0, V a1 (0，x)＝VF；
When R = R (x), V a1 (R，x)＝0。
For the heat pipe spinning process, n more fibers exist in the filament bundle,
R e ＝2V fr R/v 0 v 0 = kinematic air viscosity
Coefficient of friction of airλ 0 = air thermal conductivity;
ζ＝8[x/2R e R] 0.5 x is the starting position of the heat pipe.
Obviously, x, R as the tow travels down the heat pipe e R, etc. change, zeta change, alpha 0f After changing the diameter, alpha 0f Respectively, changes occur in the heat pipe. When the diameter becomes smaller, α 0f Increase, i.e., increase in tow friction, and vice versa. Thus, the stress variation-based adjustment is realized.
2. Principle for regulating stress of fiber in temperature field
Heat balance of slave fiber in heat pipe
And air flow heat balance
Therefore, the following steps are carried out:
r (x) becomes smaller, T 0 The (r, x) distribution and the T (r, x) distribution all change, resulting in a steady increase of the tows.
3. Oriented crystallization and orientation-induced crystallization in macromolecular structures of fibers
During the forming process of the fiber, under the action of stress, temperature and speed fields, the fiber generates orientation and oriented crystallization:
wherein, delta n = birefringence characterizing degree of orientation; a. The 0p Stress optical coefficient, = stress optical coefficient, [ tau ] m -a relaxation time spectrum.
When the stress is increased in the form of an increase in stress,
increase, Δ n And (4) increasing.
Birefringence delta n Increase the crystallization rate constant k (T, delta) n ) And (4) increasing. 10 3 -10 5 And (4) doubling. Thereby, lead toRapid orientation-induced crystallization. Thus, adjustment of fiber orientation and crystallization is achieved.
4. Fiber structure and Performance relationships
The fiber structure also determines the fiber properties. For example, fiber shrinkage
S＝K(1-θ)f a +b
Fiber shrinkage is proportional to the degree of orientation, and to the degree of crystallinity Δ n In inverse proportion.
The heat pipes with different shapes and states are adopted, and different spinning processes are adopted simultaneously, so that the spinning of the same component or different components can be carried out, tows with different structures are obtained, and then the multi-component three-different filaments and the colored filaments of single component, double component and the like are obtained.
Drawings
Fig. 1 is a schematic view showing the action of the air flow field in the reducing heat pipe of the present invention.
Fig. 2 is a schematic sectional view of a variable diameter heat pipe having a trumpet-shaped axial longitudinal section according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a heat pipe with a variable diameter whose axial longitudinal section is an outward convex curve (i.e., hyperbolic curve) according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a variable diameter heat pipe with an axial longitudinal section of an inward curved (hyperbolic) type according to an embodiment of the present invention.
Fig. 5 and 6 are schematic cross-sectional views of a heat pipe with two repeated curves in axial longitudinal section according to two embodiments of the present invention.
FIG. 7 is a schematic view of the spinning process of the spinning apparatus using the heat pipe with variable diameter according to the present invention.
In the figure, 1 is a spinneret, 2 is a side-blowing micro-cooling device, 3 is a heat pipe, 4 is an upper nozzle, 5 is a mesh nozzle, and 6 is a winding device. a is a heating layer and b is a heat-insulating layer.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings in conjunction with examples.
Example 1
Spinning process and device for spinning 120D/36f terylene by using outward convex-curved hyperbolic type reducing heat pipe
The polyester filament is spun by using a 36-hole spinneret plate of an outward convex-curved hyperbolic type variable diameter heat pipe as shown in fig. 3. The length of the reducing heat pipe is 1.5m, and the inner diameter of the reducing heat pipe is 2.0-4.5 mm. At a distance of 80cm from the spinneret. The spinneret hole diameter is 0.23mm, and L/D =2.5. The spinning temperature was 290 ℃. The heating temperature of the heat pipe is set to be 180 ℃,200 ℃ and 220 ℃. The temperature of the spinning beam is 280-290 ℃.
The cooling blowing speed of the side blowing window was 0.4 m/sec, the temperature was 25 ℃ and the RH of the air was 65%. The heat pipes are uniformly radiated, and thus, a stable heat conduction system is established among the filament, the heat pipes and the side blowing windows.
The outward convex type variable diameter heat pipe of this example was used for spinning at a winding speed of 4200 m/min, the intrinsic viscosity of chips [. Eta. ] =0.65dl/g, the aperture of the spinneret was 0.23, and the number of holes was 48. The total denier of the spun fiber was up to 120dtex. The spun filament has the strength of 3.5CN/dtex, the elongation of 35 percent, the non-uniform elongation of 4.2 percent, the Uster evenness rate of 1.05 percent and the boiling water shrinkage rate of 8 percent.
The above various performance indexes of polyester filaments were carried out by using a method and an apparatus for measuring polyester drawn yarns in industrial production, and the standard for the performance indexes was GB 8960/88.
Example 2
Spinning process and device for spinning 120D/36f terylene by using inward convex curve hyperbolic type reducing heat pipe
The polyester filament was spun using a 36-hole spinneret using an inwardly convex hyperbolic tapered heat pipe as shown in fig. 4. The heating temperature of the heat pipe is set to be 130 ℃,160 ℃ and 190 ℃. Otherwise, the same procedure as in example 1 was repeated.
The total denier of the spun fiber was up to 120dtex. The spun filament had a strength of 3.2CN/dtex, an elongation of 42%, a draw-off of 4.4%, a Uster evenness of 1.05% and a boiling water shrinkage of 62%.
Example 3
Spinning process and device for spinning 120D/36f cation modified terylene by using wave curve type reducing heat pipe
Except for using a wave curve type reducing heat pipe as shown in fig. 5, the curve is hyperbolic, the spinning temperature is 284 ℃, the heating temperature of the heat pipe is set to three sections of 180 ℃,200 ℃ and 220 ℃, the intrinsic viscosity [ eta ] =0.60dl/g of the slices, the water content is 28ppm, the spinning speed is 3500 m/min, and the cationic modified polyester low-shrinkage yarn is obtained by spinning as in example 1. The total denier of the spun fiber was up to 128dtex. The spun filament has the strength of 3.15CN/dtex, the elongation of 38 percent, the non-uniform elongation of 4.4 percent, the Wuster evenness degree of non-uniformity of 1.07 percent and the boiling water shrinkage of 30 percent.
Example 4
Spinning process and device for spinning 120D/36f cation modified polyester high-shrinkage yarns by using outward convex curve type variable-diameter heat pipe
The cationic modified polyester high-shrinkage yarn was spun as in example 3, except that an outward convex curved variable diameter heat pipe was used as shown in fig. 3, the curve was parabolic, the spinning temperature was 284 ℃, the heating temperature of the heat pipe was set to three sections of 130 ℃,160 ℃ and 190 ℃, and the winding speed was 3000 m/min. The total denier of the spun fiber was up to 128dtex. The spun filament has the strength of 3.0CN/dtex, the elongation of 35 percent, the non-uniform elongation of 4.4 percent, the Uster evenness rate of 1.10 percent and the boiling water shrinkage of 58 percent.
Example 5
Spinning process and device for spinning 200d/72f polyester multifilament by using double reducing heat pipes
One of the heat pipes is an outward convex curved hyperbolic type variable diameter heat pipe with an inner diameter of 2.5-4.5mm as shown in FIG. 3, the heating temperature of the heat pipe is set to be three sections of 160 ℃,190 ℃ and 220 ℃, and the winding speed is 5000 m/min. The second heat pipe was the same as example 1 except that a straight heat pipe having an inner diameter of 3.3cm was used, and the heating temperature of the heat pipe was set to three sections of 180 ℃,180 ℃ and 220 ℃. Spinning to obtain the polyester single-component shrinkable yarn. The total denier of the spun fiber was 200dtex/72f. Wherein, the first heat pipe is 120d/36f, and the second heat pipe is 80d/36f. The strength of the spun filament is 3.52CN/dtex, the elongation is 30%, the non-uniform elongation is 4.2%, the boiling water shrinkage is 32%, and the boiling water shrinkage difference is 18%.
Example 6
Spinning process and device for spinning three-different polyester fiber multifilament by using double reducing heat pipes
One of the heat pipes is an inward convex curve hyperbolic curve type variable diameter heat pipe as shown in figure 4, the inner diameter is 3.5mm, and the heating temperature is constant at 150 ℃; spinneret corresponding to 48 holes on the left side, d =0.2,4d = 2.5; the second heat pipe is a wave-shaped heat pipe as shown in FIG. 5, the inner diameter of the second heat pipe is 3.3mm, and the heating temperature of the second heat pipe is set to three sections of 200 ℃, 240 ℃ and 255 ℃. Corresponds to a spinneret plate with 16 holes on the right side, a trefoil shape, a leaf length of 0.3mm, a leaf width of 0.1mm and a hole depth of 1.2. Otherwise, a triisomultifilament (different cross section, different fineness, different shrinkage) was spun as in example 1. The strength of the spun filament is 3.4CN/dtex, the elongation is 35%, the non-uniform elongation is 4.2%, the boiling water shrinkage rate is 36%, the boiling water shrinkage rate difference is 28%, and the differential fineness ratio is 2.5: 5= 1: 2.
Example 7
Spinning process and device for spinning cationic modified polyester (CDPET)/Polyester (PET) fiber multifilament by using double reducing heat pipes
The cationic modified polyester (CDPET)/Polyester (PET) fiber multifilament was spun in the same manner as in example 1, the CDPET and polyester PET chips in the same manner as in example 4, except that the intrinsic viscosity [ =0.65dl/g for PET chips and [ =0.60dl/g for CDPET chips. The total denier of the spun fiber was 240dtex/72f. The strength of the spun filament is 3.4CN/dtex, the elongation is 43 percent, the boiling water shrinkage rate is 29 percent, and the boiling water shrinkage rate difference is 28 percent.
Example 8
Spinning process and device for spinning cationic modified polyester (CDPET)/Polyester (PET) fiber multifilament by using double reducing heat pipes
The spinning process of PET is the same as that of example 1, the spinning process of CDPET is the same as that of example 4 except that PET corresponds to a hyperbolic heat pipe I with an inner diameter size of 2.5-3.5 mm as shown in FIG. 4, and intrinsic viscosity [ eta ] =0.60dl/g of CDPET slice, and cationic modified polyester (CDPET)/Polyester (PET) fiber multifilament is obtained by spinning. The total denier of the spun fiber was 240dtex/72f. The spun filament had a strength of 3.4CN/dtex, elongation of 43%, boiling water shrinkage of 29%, and a difference in boiling water shrinkage of 28%.
Example 9
Spinning process and device for spinning polyester single-component differential shrinkage yarn by using double heat pipes
A linear heat pipe having an inner diameter of 3.3mm and a length of 1.65cm, which was not heated, i.e., maintained at a temperature of about 30 ℃ was used as the first heat pipe. The other heat pipe is a horn-shaped heat pipe with the inner diameters of two ends of the heat pipe being 2.5mm and 3.8mm (close to the end of the spinneret), and the heating temperature of the heat pipe is set to be three sections of 150 ℃,180 ℃ and 210 ℃. The CDPET chip has intrinsic viscosity [ eta ] =0.65dl/g, spinning temperature 290 deg.C, chip water content 25ppm, spinneret plate aperture 0.23mm, L/D =2.5, cooling blowing speed 0.4 m/s, 25 deg.C, RH65%. The winding speed was 4200 m/min. Spinning to obtain the polyester single-component differential shrinkage yarn. The total denier of the spun fiber is 200dtex/72f (wherein the first heat pipe is 125dtex/48f, and the second heat pipe is 75dtex/24 f). The spun filament has a strength of 3.48CN/dtex, an elongation of 30%, a boiling water shrinkage of 27%, and a boiling water shrinkage difference of 20%.
Example 10
Spinning process and device for spinning single-component polyester three-difference yarns by using double heat pipes
The first heat pipe is a linear heat pipe, the inner diameter of the first heat pipe is 3.3mm, the length of the first heat pipe is 1.65cm, and the heating temperature of the first heat pipe is set to be three sections of 180 ℃,200 ℃ and 250 ℃. The second heat pipe adopts an inward convex curve hyperbolic heat pipe as shown in figure 4, and the inner diameter is 1.5-4.0 mm. No heating, i.e. its temperature is about 30 ℃. The spinneret aperture is 0.24mm, and L/D =2.5.
The three-blade leaf length of the 24-hole spinneret plate is 0.3mm, the leaf width is 0.1mm, and the leaf depth is 0.6mm. The diameter of a single hole of the 36-hole spinneret plate is 0.2mm, and the depth of the hole is 0.6mm. The spinning speed was 5600 m/min. The other steps are the same as example 9, and the terylene single-component three-different shrinkage yarn is obtained by spinning. The total denier of the spinning fiber reaches 150dtex/796f (68 dtex/36f +48dtex/36f +36dtex/24f three-blade). The strength of the spun triisofilament is 3.6 CN/dtex, the elongation is 30 percent, the boiling water shrinkage rate is 32 percent, and the boiling water shrinkage rate difference is 21 percent.
In summary, the spinning method of the present invention employs one or more of the above variable diameter heat pipes, and by applying different inner wall curves and temperatures to the one or more variable diameter heat pipes, different air flow fields and temperature fields can be formed at a spinning speed of 2000-8000 m/min, particularly 3000-6000 m/min, and stress-induced crystallization and thermal crystallization occur inside the filaments under the action of tension and heat; by this, the crystallization point and crystallinity of the yarn are adjusted, whereby a multifilament yarn excellent in dyeing uniformity, dyeability, strength and elongation from fine denier to coarse denier (20 dtex to 300dtex per yarn, 0.4 to 6dtex per single fiber) is produced. The multifilament consists of monofilaments with various properties such as shrinkage, crystallinity and dyeing properties. Thus, the variety of the heat pipe spinning of the synthetic fiber is expanded. The spun yarn includes grey filament, triisofilament, co-spun filament, etc. produced with dacron, modified polyester, nylon 6, nylon 66, etc. in the melt spinning series, special fiber series, etc.
The reducing heat pipe and the spinning device thereof have the advantages of simple design and manufacture, low energy consumption and convenient maintenance; can be suitable for various occasions; the spinning method for manufacturing the synthetic fiber filament by adopting the variable-diameter heat pipe and the spinning device has short spinning process flow and is easy to operate; the cost is low, and the polyester multi-variety yarn can be spun from fine denier to coarse denier (20 dtex-300 dtex/yarn, 0.4-6 dtex/single fiber).
Claims (4)
1. A spinning process for the production of synthetic fibres, said process comprising the steps of:
(1) Extruding the molten polyester from a spinneret orifice, and carrying out primary cooling through a side blowing window;
(2) The tows respectively enter more than two heating pipes, and the moving tows finish stretching and oriented crystallization in one step in an air flow field and a temperature field formed in the heating pipes;
(3) Oiling and networking, and winding at a winding speed of 2000-8000 m/min to obtain the fully-stretched yarn;
it is characterized in that the preparation method is characterized in that,
the inside diameter of the pipe cross section circle of at least one of the heating pipes is changed, the temperature of the heating pipe is in the temperature range which is constant or changed and is divided into three heating temperature sections at room temperature-260 ℃, and the temperature ranges of the three sections are in an increasing relation including a leveling stage so as to form a temperature field.
2. The spinning process for the production of synthetic fibers according to claim 1,
the heating pipe is in a constant or variable temperature range of 120-260 ℃ and is divided into three heating temperature sections, the temperature ranges of the three heating temperature sections are three heating temperature sections of 120-200 ℃, 160-240 ℃ and 200-260 ℃, and the temperature ranges of the three sections are in an increasing relation including a leveling stage so as to form a temperature field.
3. Spinning process for the production of synthetic fibers according to claim 1,
the heating pipe is in a constant or variable temperature range of 120-260 ℃ and is divided into three heating temperature sections, the temperature ranges of the three heating temperature sections are 140-180 ℃, 160-220 ℃ and 200-240 ℃, and the temperature ranges of the three sections are in an increasing relation including a leveling stage so as to form a temperature field.
4. The spinning process for the production of synthetic fibers according to claim 1,
the heating pipe is in a constant or variable temperature range of 120-260 ℃ and is divided into three heating temperature sections, the temperature ranges of the three heating temperature sections are 160-180 ℃, 190-200 ℃ and 210-240 ℃, and the temperature ranges of the three sections are in a progressive relation including a leveling stage so as to form a temperature field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991200004A CN100374631C (en) | 1999-11-11 | 1999-11-11 | Reducing thermotube and spinning device and method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991200004A CN100374631C (en) | 1999-11-11 | 1999-11-11 | Reducing thermotube and spinning device and method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1296089A CN1296089A (en) | 2001-05-23 |
| CN100374631C true CN100374631C (en) | 2008-03-12 |
Family
ID=5281283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991200004A Expired - Fee Related CN100374631C (en) | 1999-11-11 | 1999-11-11 | Reducing thermotube and spinning device and method using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100374631C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2009163T3 (en) * | 2007-06-29 | 2014-01-13 | Reifenhaeuser Gmbh & Co Kg | Device for making filter cloth |
| CN101403153B (en) * | 2008-10-20 | 2011-10-19 | 桐乡市中维化纤有限公司 | Hart dacron thread and its production technique |
| CN105839207B (en) * | 2016-05-09 | 2018-02-09 | 桐乡市中辰化纤有限公司 | It is ultralow to shrink the production method for having light FDY |
| CN109483851B (en) * | 2018-12-28 | 2021-09-28 | 苏州聚复高分子材料有限公司 | Process for controlling polymer crystallinity in extrusion processing process |
| CN115161781A (en) * | 2022-06-23 | 2022-10-11 | 东华大学 | Hybrid gel filament forming method |
| CN116716670B (en) * | 2023-06-19 | 2024-06-04 | 桐昆集团浙江恒通化纤有限公司 | Polyester pre-oriented yarn for direct weaving and preparation method thereof |
| CN117248284A (en) * | 2023-08-08 | 2023-12-19 | 浙江佳宝聚酯有限公司 | Process for producing chemical regenerated cationic filament by heat pipe method |
| CN117822139A (en) * | 2024-03-01 | 2024-04-05 | 常州市盛杰合力化纤有限公司 | Filament winding breakage-proof equipment for polyester production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4902461A (en) * | 1987-03-20 | 1990-02-20 | Barmag, Ag | Method for heating an advancing yarn |
-
1999
- 1999-11-11 CN CNB991200004A patent/CN100374631C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4902461A (en) * | 1987-03-20 | 1990-02-20 | Barmag, Ag | Method for heating an advancing yarn |
Non-Patent Citations (1)
| Title |
|---|
| 热管纺丝中若干工艺和设备参数的试验分析. 徐晓辰.金山油化纤，第2期. 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1296089A (en) | 2001-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR970007428B1 (en) | Process and apparatus for high speed melt spinning | |
| US5356582A (en) | Continuous hollow filament, yarns, and tows | |
| CN101328619B (en) | Manufacturing method of bright straight polyester filament | |
| CN101139735A (en) | Method for preparing ultra-fine denier polyester filament yarn | |
| EP0621357B1 (en) | Method and apparatus for producing polyester fiber | |
| CN106591969B (en) | A kind of preparation method of polyether-ether-ketone doughnut | |
| US5866055A (en) | Process for the production of a polyester multifilament yarn | |
| US5417902A (en) | Process of making polyester mixed yarns with fine filaments | |
| CN100374631C (en) | Reducing thermotube and spinning device and method using the same | |
| KR960031662A (en) | Method and Apparatus for Producing Multi-fiber Irradiation | |
| US4113821A (en) | Process for preparing high strength polyamide and polyester filamentary yarn | |
| US5585182A (en) | Process for polyester fine hollow filaments | |
| CN116716670B (en) | Polyester pre-oriented yarn for direct weaving and preparation method thereof | |
| CN107164812B (en) | Special-shaped chinlon 6 fiber and preparation method thereof | |
| CN109440205A (en) | A kind of preparation process of high-strength polyester fine denier profiled silk | |
| CN104195653A (en) | PBT fiber manufacturing method based on high speed one-step method | |
| US5691057A (en) | Polyester mixed yarns with fine filaments | |
| US5487859A (en) | Process of making fine polyester hollow filaments | |
| US4514350A (en) | Method for melt spinning polyester filaments | |
| CN1060827C (en) | High speed single step spining art for polyester full stretchable filament, equipment and the schics heat-pipe thereof | |
| KR100208055B1 (en) | A spinning process for producing high strength, high modulus, low shrinkage synthetic yarns | |
| KR20100033246A (en) | Spining machine having a heating/cooling setting system | |
| US5182068A (en) | High speed spinning process | |
| CN109385676B (en) | Production process of multi-micro-surface reflection special-shaped composite colored polyester filament yarn | |
| CN1243138C (en) | Production process of composite Dacron filament with special shape, different fiber and different shrinkage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xuzhou Silk Differential Fiber Technology Co., Ltd. Assignor: Donghua University Contract fulfillment period: 2009.1.12 to 2014.1.11 contract change Contract record no.: 2009320000207 Denomination of invention: Reducing thermotube and spinning device and method using the same Granted publication date: 20080312 License type: Exclusive license Record date: 2009.3.4 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.1.12 TO 2014.1.11; CHANGE OF CONTRACT Name of requester: XUZHOU SILK DIFFERENTIAL FIBERS SCIENTIFIC AND TEC Effective date: 20090304 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20131111 |