A method for producing composite spun fiber rolls
By designing a core-sheath composite structure and optimizing parameters, the problems of poor antistatic effect, insufficient mechanical properties, and poor spinning process stability of polyester fibers have been solved, resulting in the preparation of high-strength, low-shrinkage composite spun fiber rolls suitable for high-end applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUAIAN HUNUWA NEW MATERIALS CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-06-26
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of composite fiber new materials, and in particular to a method for producing composite spun fiber rolls. Background Technology
[0002] Polyester fiber is widely used in clothing fabrics, industrial textiles, and home decoration due to its excellent tensile strength, elastic modulus, chemical resistance, and dimensional stability. However, the lack of polar hydrophilic groups in the polyester molecular structure results in extremely poor moisture absorption, making it prone to static electricity accumulation during processing and use. This leads to fiber entanglement, fabric dust and dirt accumulation, discomfort when worn, and even electrostatic discharge safety hazards, greatly limiting its application in high-end fields.
[0003] In existing technologies, there are three main ways to improve the antistatic properties of polyester fibers: First, adding antistatic agents during the spinning process for blending modification. However, this method presents a contradiction: excessive addition of antistatic agents leads to a significant decrease in fiber mechanical properties, while insufficient addition results in inadequate antistatic effects. Furthermore, antistatic agents are prone to migration and loss, leading to severe attenuation of effects over long-term use. Second, applying an antistatic coating to the fiber surface. However, the antistatic layer produced by this method has poor water and abrasion resistance and is prone to peeling off during subsequent processing and use, failing to achieve durable antistatic properties. Third, employing a core-sheath composite spinning technology, using the antistatic component as the sheath layer and conventional polyester as the core layer, to balance antistatic and mechanical properties. However, existing core-sheath composite spinning processes suffer from uneven core-sheath structure, poor spinning stability, easy core-sheath separation, and melt gel clogging. Moreover, it cannot simultaneously achieve high strength and low shrinkage characteristics of the fiber, resulting in fiber rolls with poor winding and forming properties and insufficient adaptability for subsequent processing. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, the present invention aims to provide a method for producing composite spun fiber rolls. This invention utilizes a core-sheath composite structure design, employing a multi-component polyester with added nano-antistatic agents and compatibilizers as the sheath component and polyester PET chips as the core component. Optimizing the melting characteristics of the modified multi-component polyester sheath and the PET chips core, the invention optimizes the temperature parameters of each zone of the screw, the two-stage drawing and heat-setting process, and the winding parameters. This solves the problems of poor antistatic effect, insufficient mechanical properties, high heat shrinkage, poor spinning process stability, and poor roll formability of existing polyester composite fibers. The resulting composite fiber roll possesses excellent properties of durable antistatic properties, high strength, and low shrinkage, with strong process controllability and high production efficiency, making it suitable for large-scale industrial production.
[0005] The objective of this invention is achieved through the following technical solution: A method for producing composite spun fiber rolls includes the following steps: Raw material preparation: The multi-component polyester and polyester PET chips are dried to obtain dried raw materials with qualified moisture content. 0.5-1.5wt% of nano-sized antistatic agent and 1-3wt% of compatibilizer are added to the dried multi-component polyester and mixed evenly to obtain the modified leather component raw material. Composite spinning: The modified leather component raw material and polyester PET chips are fed into two independent screw extruders of a leather-core type composite spinning machine, wherein the leather component screw and the core component screw are processed sequentially through the feeding zone, the first melting zone, the second melting zone, the metering zone, and the homogenization zone. Screw process parameters for the skin component: feed zone temperature 235-245℃, first melting zone temperature 255-265℃, second melting zone temperature 270-275℃, metering zone temperature 265-270℃, homogenization zone temperature 260-265℃; Core component screw process parameters: feed zone temperature 240-250℃, first melting zone temperature 260-270℃, second melting zone temperature 275-280℃, metering zone temperature 270-275℃, homogenization zone temperature 265-270℃; By controlling the mass ratio of the core and sheath components to 1:0.9-1.1 during the spinning process, a uniform polymer melt is obtained. Melt filtration: The polymer melt is filtered through a metal filter to remove impurities and gel particles, resulting in a filtered melt. Spinning: The filtered melt is spun into fibers through a spinneret. The mass ratio of the sheath to the core is controlled to be 1:0.8-1.2 during the spinning process. This ensures that the mass ratio of the sheath to the core is synergistic with the concentration of the antistatic agent in the sheath, forming an antistatic agent enrichment layer on the fiber surface, resulting in a primary fiber bundle with a surface resistivity ≤5×10^8Ω / sq. Cooling and shaping: The nascent fiber bundle is cooled to obtain a nascent composite fiber bundle with a dense structure and uniform fineness; Drawing and heat setting: The nascent composite fiber bundle is fed into a drawing device for two-stage drawing treatment, wherein the first stage drawing ratio is 3.0-3.5 and the second stage drawing ratio is 1.1-1.2. The orientation and crystallinity of the fiber bundle are adjusted to obtain the drawn fiber bundle; then the drawn fiber bundle is heat-set at 120-130℃ for 8-10 minutes to obtain the set composite fiber bundle. Winding and forming: The shaped composite fiber bundle is fed into a winding device, and the winding speed is controlled at 2800-3200m / min, the tension is 0.2-0.3cN / dtex, and the winding density is 0.65-0.70g / cm³ to obtain composite spun fiber roll material.
[0006] Furthermore, in the drawing and heat setting steps, the first-stage drawing temperature is 85-90℃, the second-stage drawing temperature is 110-120℃, the total drawing ratio is 4.0-5.3, and the drawing equipment adopts an eight-roller guide machine, which controls the tension of the yarn bundle through eddy current braking to ensure uniform tension.
[0007] Furthermore, in the spinneret forming step, the spinneret is a core-type spinneret with circular spinneret holes. The diameter of the spinneret holes is 0.25-0.35 mm, and the length-to-diameter ratio of the spinneret holes is 2:1-3:1.
[0008] Furthermore, in the cooling and forming step, a side-blowing cooling process is adopted, with a side-blowing air temperature of 18-22℃, a relative humidity of 65-75%, an air velocity of 0.4-0.6m / s, and a cooling zone length of 1.2-1.5m.
[0009] Furthermore, the winding equipment adopts a fully automatic winding head, and the tension fluctuation during the winding process is controlled within ±3%, and the winding is formed into a cylindrical tube roll material.
[0010] Furthermore, in the raw material preparation step, the multi-component polyester is one or more of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polypropylene terephthalate (PTT). The drying temperature of the multi-component polyester is 120-130℃, the drying time is 12-16h, and the moisture content after drying is ≤50ppm. The drying temperature of the polyester PET chips is 140-150℃, the drying time is 10-14h, and the moisture content after drying is ≤30ppm.
[0011] Furthermore, in the raw material preparation step, the nanoscale antistatic agent is one or more of nanoscale conductive carbon black, nanoscale zinc oxide, and nanoscale antimony tin oxide (ATO), with an average particle size of 20-100 nm; the compatibilizer is one or more of maleic anhydride-grafted polyester PET-g-MAH, maleic anhydride-grafted ethylene-vinyl acetate copolymer EVA-g-MAH, and epoxy polyester chain extender.
[0012] Furthermore, in the melt filtration step, the metal filter screen adopts a double-layer filter screen structure combining 200-300 mesh and 400-500 mesh, and the melt pressure is controlled at 12-15 MPa during the filtration process.
[0013] Compared with existing technologies, the production method of composite spun fiber rolls of the present invention has the following beneficial effects: (1) This invention uses a core-shell composite structure design, with a multi-polyester containing nano-antistatic agents and compatibilizers as the shell component and polyester PET chips as the core component. Based on the melting characteristics of the modified multi-polyester shell and the PET chips in the core layer, the temperature parameters of each zone of the screw, the two-stage drawing heat setting process and the winding parameters are optimized respectively. This solves the problems of poor antistatic effect, insufficient mechanical properties, high heat shrinkage rate, poor spinning process stability and poor roll formability of existing polyester composite fibers. The resulting composite fiber roll has excellent properties of long-lasting antistatic, high strength and low shrinkage. Moreover, the process is highly controllable and the production efficiency is high, making it suitable for large-scale industrial production.
[0014] (2) The production process of the present invention is controllable, the parameter range is accurate, the equipment is highly adaptable, no new complex equipment is required, and large-scale production can be achieved on existing composite spinning production lines. It has high production efficiency, good economic benefits and promotion and application value. Detailed Implementation
[0015] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example
[0018] This embodiment provides a method for producing composite spun fiber rolls, including the following steps: Raw material preparation: PET copolymerized modified polyester with a melting point of 235℃ was selected as the skin matrix, and fiber-grade PET chips were selected as the core matrix. The copolymerized modified polyester was vacuum dried at 125℃ for 14h, and the PET chips were vacuum dried at 145℃ for 12h. After drying, the moisture content of both raw materials was ≤28ppm. 1.0wt% of a high-temperature resistant polyether ester type nano-antistatic agent with a particle size of 50nm and 2.0wt% of maleic anhydride-grafted PET compatibilizer were added to the dried copolymerized modified polyester and mixed in a high-speed mixer for 15min to obtain a uniform modified skin component raw material. Composite spinning: Modified leather component raw materials and PET chips are fed into two independent single-screw extruders of a leather-core type composite spinning machine. Both screws pass through the feeding zone, the first melting zone, the second melting zone, the metering zone, and the homogenization zone in sequence for melt extrusion processing. Screw process parameters for the skin component: feed zone temperature 240℃, first melting zone temperature 260℃, second melting zone temperature 272℃, metering zone temperature 268℃, homogenization zone temperature 262℃; Core component screw process parameters: feed zone temperature 245℃, first melting zone temperature 265℃, second melting zone temperature 278℃, metering zone temperature 272℃, homogenization zone temperature 268℃; By using dual metering pumps to independently meter the components and control the mass ratio of the core and skin components to 1:1, a homogeneous polymer melt with matching rheological properties is obtained. Melt filtration: The polymer melt is filtered through a double-layer metal filter screen of 250 mesh + 450 mesh. The melt pressure is controlled at 13MPa during the filtration process to remove impurities and gel particles from the melt, resulting in filtered melt. Spinning: The filtered melt is spun into filaments through a spinneret with a spinneret orifice diameter of 0.3 mm and an aspect ratio of 2.5:1. The mass ratio of the core and sheath components is controlled to be 1:1 during the spinning process, forming a continuous and uniform antistatic agent enrichment layer on the fiber surface to obtain the nascent filament bundle. The surface resistivity of the nascent filament bundle is measured to be 3.2 × 10^8 Ω / sq. Cooling and shaping: The nascent filament bundles after spinning are cooled by side blowing air at a temperature of 20℃, relative humidity of 70%, wind speed of 0.5m / s, and a cooling zone length of 1.4m to obtain nascent composite fiber bundles with a dense structure and uniform fineness. Drafting and heat setting: The nascent composite fiber bundles are fed into a drafting device for two-stage drafting treatment. The first stage of drafting is carried out in a water bath at 75°C with a drafting ratio of 3.2. The second stage of drafting is carried out in a steam bath at 105°C with a drafting ratio of 1.15. The drafted fiber bundles are then heat-set at 125°C for 9 minutes to obtain the set composite fiber bundles. Winding and forming: The shaped composite fiber bundle is fed into a fully automatic winding head, the winding speed is controlled at 3000m / min, the winding tension is 0.25cN / dtex, the winding density is 0.68g / cm³, and the tension fluctuation is controlled within ±2%, to obtain a cylindrical composite spun fiber roll.
[0019] In the raw material preparation step, a core-sheath composite structure design is adopted. Multi-component polyester with added nano antistatic agents and compatibilizers is used as the sheath component, and polyester PET chips are used as the core component. This achieves excellent and long-lasting antistatic performance through the nano-conductive pathways of the sheath layer, while ensuring the basic mechanical strength of the fiber through the polyester PET chips in the core layer. This solves the problem that antistatic performance and mechanical performance cannot be achieved simultaneously in the existing technology. The resulting fiber has a surface resistivity ≤10^8Ω・cm and a breaking strength ≥4.5cN / dtex.
[0020] By strictly controlling the drying moisture content and combining it with the temperature, rotation speed and time parameters of high-speed mixing, the uniform dispersion of nano-antistatic agents in the multi-component polyester matrix was achieved, avoiding problems such as melt gelation, spinneret clogging and fiber mechanical properties degradation caused by nanoparticle agglomeration, and significantly improving the stability and production continuity of the spinning process.
[0021] In the composite spinning step, the temperature parameters of each zone of the screw were optimized to optimize the melting characteristics of the modified polyester sheath and the PET chips core. This ensured that the melt viscosity and flowability of the two melts were highly matched, avoiding problems such as sheath-core eccentricity, interface delamination, and broken or fuzzy fibers caused by differences in melt rheological properties. With the help of a high-precision metering pump to control the sheath-core mass ratio, the resulting composite fiber has a uniform and complete sheath-core structure without eccentricity or separation, and the fiber fineness deviation rate is ≤2%.
[0022] In the melt filtration step, the double-layer filter structure can effectively remove impurities and gel particles from the melt, prevent spinneret clogging, extend the service life of the spinneret, and ensure the continuity of the spinning process with stable melt pressure.
[0023] In the spinneret formation process, optimized spinneret orifice parameters ensure smooth melt extrusion, uniform cross-section of the nascent filament bundle, and intact core-sheath structure.
[0024] In the cooling and forming step, the precisely controlled side-blowing process ensures uniform cooling and solidification of the fiber bundle, avoiding problems such as fiber bundle adhesion and uneven fineness, and producing a dense and uniform nascent composite fiber bundle.
[0025] In the stretching and heat setting steps, a two-stage gradient stretching combined with a constant temperature and time heat setting process is adopted to precisely control the orientation and crystallinity of the fiber, fully eliminate the internal stress of the fiber, and significantly reduce the heat shrinkage rate of the fiber while improving the fiber breaking strength. The resulting fiber has a dry heat shrinkage rate of ≤2.5% and excellent dimensional stability.
[0026] In the winding and forming step, the winding and forming process parameters were optimized, and the winding speed, tension and winding density were precisely controlled. The resulting composite fiber roll material was well-formed, without defects such as edge collapse or decoupling, and the roll density was uniform. The subsequent unwinding was smooth, and it could be directly adapted to subsequent processing steps such as weaving and non-woven fabrics, with strong adaptability. Example
[0027] This embodiment provides a method for producing composite spun fiber rolls, the steps of which are basically the same as those in Embodiment 1, the only difference being the adjustment of the process parameters as follows: Raw material preparation: 0.5 wt% of nano-sized antistatic agent and 1.0 wt% of compatibilizer are added to the dried multi-component polyester; Composite spinning: Sheet component screw process parameters: feed zone temperature 235℃, first melting zone temperature 255℃, second melting zone temperature 270℃, metering zone temperature 265℃, homogenization zone temperature 260℃; Core component screw process parameters: feed zone temperature 240℃, first melting zone temperature 260℃, second melting zone temperature 275℃, metering zone temperature 270℃, homogenization zone temperature 265℃; Sheet-core component mass ratio is 1:0.9; Drawing and heat setting: First stage draw ratio 3.0, second stage draw ratio 1.1; heat setting temperature 120℃, time 8min; Winding: Winding speed 2800m / min, tension 0.2cN / dtex, winding density 0.65g / cm³. Example
[0028] This embodiment provides a method for producing composite spun fiber rolls, the steps of which are basically the same as those in Embodiment 1, the only difference being the adjustment of the process parameters as follows: Raw material preparation: 1.5 wt% of nano-sized antistatic agent and 3.0 wt% of compatibilizer are added to the dried multi-component polyester; Composite spinning: Sheet component screw process parameters: feed zone temperature 245℃, first melting zone temperature 265℃, second melting zone temperature 275℃, metering zone temperature 270℃, homogenization zone temperature 265℃; Core component screw process parameters: feed zone temperature 250℃, first melting zone temperature 270℃, second melting zone temperature 280℃, metering zone temperature 275℃, homogenization zone temperature 270℃; Sheet-core component mass ratio is 1:1.1; Drawing and heat setting: First stage drawing ratio 3.5, second stage drawing ratio 1.2; heat setting temperature 130℃, time 10min; Winding: Winding speed 3200m / min, tension 0.3cN / dtex, winding density 0.70g / cm³.
[0029] Comparative Example 1 This comparative example demonstrates the existing production method for conventional blended antistatic PET fibers. The specific steps are as follows: PET chips were vacuum dried at 145°C for 12 hours. 2.0 wt% of the same nano antistatic agent as in Example 1 and 2.0 wt% of compatibilizer were added. After being mixed evenly, the mixture was fed into a single-screw extruder with a screw temperature of 240-280°C. The mixture was then spun, cooled, drawn, heat-set, and wound to obtain antistatic fiber rolls. The drawing, heat-setting, and winding parameters were the same as in Example 1.
[0030] Comparative Example 2 This comparative example is a core-sheath composite spinning method. The steps are basically the same as those in Example 1, except that the screws for the sheath component and the core component use the same process parameters, which are the core component screw parameters in Example 1. No separate optimization was performed for the sheath component.
[0031] Comparative Example 3 This comparative example is a core-sheath composite spinning method. The steps are basically the same as those in Example 1, except that the mass ratio of the core-sheath components is controlled to be 1:2, and the proportion of the sheath layer is too low.
[0032] Comparative Example 4 This comparative example is a core-sheath composite spinning method. The steps are basically the same as those in Example 1, except that the drawing process uses single-stage drawing with a drawing ratio of 4.0, a heat setting temperature of 110°C, and a time of 5 minutes.
[0033] Performance Testing and Result Analysis The composite fiber rolls prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to performance tests according to the following standards: Surface resistivity: Tested according to GB / T 14342-2015 "Test Method for Specific Resistivity of Synthetic Short Fibers"; Washing durability: Surface resistivity was tested after 50 washes according to GB / T 8629-2017 "Testing Procedures for Household Washing and Drying of Textiles"; Mechanical properties: The breaking strength and elongation at break were tested in accordance with GB / T 14344-2008 "Test Method for Tensile Properties of Synthetic Fiber Filaments"; Fineness deviation rate: Tested according to GB / T 14343-2008 "Test Method for Linear Density of Synthetic Fiber Filaments"; Spinning breakage rate: The number of filament breaks during a continuous 24-hour spinning process is counted; Heat shrinkage rate: The dry heat shrinkage rate (180℃, 15min) was tested according to GB / T 6505-2008 "Test Method for Heat Shrinkage Rate of Chemical Fiber Filaments". Roll forming quality: The uniformity, edge collapse, and loose rolling of the roll are inspected visually and with a thickness tester.
[0034] The test results are shown in Table 1 below: Table 1 Performance test results of each embodiment and comparative example
[0035] The test results show that the composite spun fiber rolls prepared in Examples 1-3 of this invention have an initial surface resistivity of ≤5×10^8Ω / sq and maintain excellent antistatic properties after 50 washes. They also have excellent mechanical properties, low fineness deviation rate, low fiber breakage rate and low shrinkage rate. The roll forming quality is excellent and is superior to the existing technical solutions in the comparative examples, which fully demonstrates the outstanding technical effect and inventiveness of this invention.
[0036] This invention utilizes a core-sheath composite structure design, employing a multi-component polyester with added nano-antistatic agents and compatibilizers as the sheath component and polyester PET chips as the core component. Optimizing the melting characteristics of the modified multi-component polyester sheath and the PET chips core, the invention optimizes the temperature parameters of each zone of the screw, the two-stage drawing and heat-setting process, and the winding parameters. This solves the problems of poor antistatic effect, insufficient mechanical properties, high heat shrinkage, poor spinning process stability, and poor roll formability of existing polyester composite fibers. The resulting composite fiber roll possesses excellent properties of durable antistatic properties, high strength, and low shrinkage, with strong process controllability and high production efficiency, making it suitable for large-scale industrial production.
[0037] The production process of this invention is controllable, the parameter range is precise, and the equipment is highly adaptable. It does not require the addition of complex equipment and can achieve large-scale production on existing composite spinning production lines. It has high production efficiency and good economic benefits and application value.
[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for producing composite spun fiber rolls, characterized in that, Includes the following steps: Raw material preparation: The multi-component polyester and polyester PET chips are dried to obtain dried raw materials with qualified moisture content. 0.5-1.5wt% of nano-sized antistatic agent and 1-3wt% of compatibilizer are added to the dried multi-component polyester and mixed evenly to obtain the modified leather component raw material. Composite spinning: The modified leather component raw material and polyester PET chips are fed into two independent screw extruders of a leather-core type composite spinning machine, wherein the leather component screw and the core component screw are processed sequentially through the feeding zone, the first melting zone, the second melting zone, the metering zone, and the homogenization zone. Screw process parameters for the skin component: feed zone temperature 235-245℃, first melting zone temperature 255-265℃, second melting zone temperature 270-275℃, metering zone temperature 265-270℃, homogenization zone temperature 260-265℃; Core component screw process parameters: feed zone temperature 240-250℃, first melting zone temperature 260-270℃, second melting zone temperature 275-280℃, metering zone temperature 270-275℃, homogenization zone temperature 265-270℃; By controlling the mass ratio of the core and sheath components to 1:0.9-1.1 during the spinning process, a uniform polymer melt is obtained. Melt filtration: The polymer melt is filtered through a metal filter to remove impurities and gel particles, resulting in a filtered melt. Spinning: The filtered melt is spun into fibers through a spinneret. The mass ratio of the sheath to the core is controlled to be 1:0.8-1.2 during the spinning process. This ensures that the mass ratio of the sheath to the core is synergistic with the concentration of the antistatic agent in the sheath, forming an antistatic agent enrichment layer on the fiber surface, resulting in a primary fiber bundle with a surface resistivity ≤5×10^8Ω / sq. Cooling and shaping: The nascent fiber bundle is cooled to obtain a nascent composite fiber bundle with a dense structure and uniform fineness; Drawing and heat setting: The nascent composite fiber bundle is fed into a drawing device for two-stage drawing treatment, wherein the first stage drawing ratio is 3.0-3.5 and the second stage drawing ratio is 1.1-1.
2. The orientation and crystallinity of the fiber bundle are adjusted to obtain the drawn fiber bundle; then the drawn fiber bundle is heat-set at 120-130℃ for 8-10 minutes to obtain the set composite fiber bundle. Winding and forming: The shaped composite fiber bundle is fed into a winding device, and the winding speed is controlled at 2800-3200m / min, the tension is 0.2-0.3cN / dtex, and the winding density is 0.65-0.70g / cm³ to obtain composite spun fiber roll material.
2. The method for producing composite spun fiber rolls according to claim 1, characterized in that: In the drawing and heat setting steps, the first-stage drawing temperature is 85-90℃, the second-stage drawing temperature is 110-120℃, the total drawing ratio is 4.0-5.3, and the drawing equipment adopts an eight-roller guide machine, which controls the tension of the yarn bundle through eddy current braking to ensure uniform tension.
3. The method for producing composite spun fiber rolls according to claim 1, characterized in that: In the spinneret forming step, the spinneret is a core-type spinneret with circular spinneret holes. The diameter of the spinneret holes is 0.25-0.35 mm, and the length-to-diameter ratio of the spinneret holes is 2:1-3:
1.
4. The method for producing composite spun fiber rolls according to claim 1, characterized in that: In the cooling and forming step, a side-blowing cooling process is adopted, with a side-blowing air temperature of 18-22℃, a relative humidity of 65-75%, an air velocity of 0.4-0.6m / s, and a cooling zone length of 1.2-1.5m.
5. The method for producing composite spun fiber rolls according to claim 1, characterized in that: The winding equipment uses a fully automatic winding head, and the tension fluctuation during the winding process is controlled within ±3%, and the material is rolled into a cylindrical tube.
6. The method for producing composite spun fiber rolls according to claim 1, characterized in that: In the raw material preparation step, the multi-component polyester is one or more of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polypropylene terephthalate (PTT). The drying temperature of the multi-component polyester is 120-130℃, the drying time is 12-16h, and the moisture content after drying is ≤50ppm. The drying temperature of the polyester PET chips is 140-150℃, the drying time is 10-14h, and the moisture content after drying is ≤30ppm.
7. The method for producing composite spun fiber rolls according to claim 6, characterized in that: In the raw material preparation step, the nano-scale antistatic agent is one or more of nano-scale conductive carbon black, nano-scale zinc oxide, and nano-scale antimony tin oxide (ATO), with an average particle size of 20-100 nm; the compatibilizer is one or more of maleic anhydride-grafted polyester PET-g-MAH, maleic anhydride-grafted ethylene-vinyl acetate copolymer EVA-g-MAH, and epoxy polyester chain extender.
8. The method for producing composite spun fiber rolls according to claim 1, characterized in that: In the melt filtration step, the metal filter screen adopts a double-layer filter screen structure combining 200-300 mesh and 400-500 mesh, and the melt pressure is controlled at 12-15 MPa during the filtration process.