High-strength special polyester filament fiber

Abstract

The invention discloses a high-strength special polyester filament fiber, and relates to the technical field of fibers, the high-strength special polyester filament fiber comprises the following raw materials by weight: 95.5-98.7% of polyethylene glycol terephthalate with intrinsic viscosity of 1.0-1.2 dL / g, 0.3-0.8% of a chain extender, 0.5-2.0% of nano inorganic particles, and 0.5-1.5% of a hydrolysis-resistant stabilizer, the terminal carboxyl group content of the polyethylene glycol terephthalate is less than 30 mol / t, and the terminal carboxyl group content of the chain extender is less than 30 mol / t. By arranging the infiltration mechanism, when fibers are dragged, rolling shafts can be driven to rotate, outer wall rotating sleeves, connecting rods and stirring balls are driven to rotate while the rolling shafts rotate, liquid contained in an infiltration box is stirred through the stirring balls, liquid flowing is generated, the liquid is made to make continuous contact with the surfaces of the fibers, the infiltration uniformity is improved, and the infiltration efficiency is improved. And due to the mixing uniformity of the liquid, the influence on the infiltration effect caused by component layering or precipitation due to long-time static state of the liquid is avoided.

Description

Technical Field

[0001] This invention relates to the field of fiber technology, specifically to a high-strength special polyester filament fiber. Background Technology

[0002] In the production process of high-strength specialty polyester filament fiber, the impregnation treatment of the fiber is an extremely critical step, and its treatment effect directly affects the performance of subsequent fiber stretching, shaping and other processes as well as the quality of the final product.

[0003] The patent application with publication number CN217351680U describes a high-strength filament based on recycled polyester, which includes: a first recycled polyester fiber, a second recycled polyester fiber, and virgin polyester fiber. The second recycled polyester fiber is distributed in a ring array around the first recycled polyester fiber to form a recycled polyester reinforcing core. The virgin polyester fiber is distributed in a ring array around the recycled polyester reinforcing core. Two adjacent virgin polyester fibers are in contact and are thermally fused together.

[0004] Currently, the traditional fiber impregnation method is to directly immerse the fiber in an impregnation box containing impregnation liquid, relying on the fiber's own movement and contact with the surface of the impregnation liquid to achieve impregnation;

[0005] However, this traditional method has many drawbacks. On the one hand, because the impregnation solution remains static for a long time, component stratification or precipitation is prone to occur. The density differences of different components cause them to gradually separate under the influence of gravity, resulting in uneven distribution of functional additives in the impregnation solution, with local concentrations being too high or too low. This not only prevents the fibers from fully and stably adsorbing the required components during the impregnation process, leading to inconsistent fiber surface treatment effects, but also affects the consistency of subsequent processing steps, significantly reducing the reliability of the finished product's performance. For example, in the subsequent stretching process, the different adsorbed components in different parts of the fiber result in different stretching properties, easily leading to problems such as fiber breakage or uneven stretching. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a high-strength specialty polyester filament fiber, thereby solving the aforementioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-strength special polyester filament fiber, whose raw material composition, by weight percentage, includes:

[0008] Polyethylene terephthalate with intrinsic viscosity of 1.0 dL / g to 1.2 dL / g: 95.5% to 98.7%;

[0009] Chain extender 0.3%–0.8%;

[0010] Nano-inorganic particles: 0.5%–2.0%;

[0011] Hydrolysis-resistant stabilizer: 0.5%–1.5%;

[0012] The content of terminal carboxyl groups in the polyethylene terephthalate is less than 30 mol / t.

[0013] Includes a conveyor, wherein a first rotating shaft and a second rotating shaft are provided on the inner wall of the conveyor, and an immersion mechanism is provided on the inner wall of the conveyor;

[0014] The wetting mechanism includes:

[0015] A rolling shaft is rotatably connected to the inner wall of the conveyor. An impregnation box is fixedly connected to the inner wall of the conveyor. A top plate is fixedly connected to the top of the impregnation box. The top of the top plate is triangular.

[0016] The rotating sleeve is a ring-shaped structure. The inner wall of the rotating sleeve is fixedly connected to the outer wall of the rolling shaft, the inner wall of the immersion box is rotatably connected to the outer wall of the rolling shaft, and a connecting rod is fixedly connected to the outer wall of the rotating sleeve.

[0017] Preferably, one end of the connecting rod is fixedly connected to a spherical ball.

[0018] Preferably, a vertical sliding plate is fixedly connected to the inner wall of the immersion box, and a lifting rod is slidably connected to the outer wall of the vertical sliding plate. The lifting rod is a circular rod-shaped structure.

[0019] Preferably, a base plate is fixedly connected to the bottom of the vertical slide plate, and a telescopic rod is fixedly connected to the top of the base plate. One end of the telescopic rod is fixedly connected to the bottom of the lifting rod.

[0020] Preferably, the inner wall of the telescopic rod is provided with a built-in spring, the number of lifting rods on the inner wall of the immersion box is nine, a pull rope is fixedly connected to one side of the lifting rod, and another lifting rod is fixedly connected to the other end of the pull rope.

[0021] Preferably, the outer wall of the lifting rod is provided with an auxiliary mechanism, the auxiliary mechanism including a hinge rod, the hinge rod being rotatably connected to the outer wall of the lifting rod, and a toggle plate being fixedly connected to the outer wall of the hinge rod.

[0022] Preferably, the outer wall of the actuating plate is provided with a diversion groove, which is a circular groove structure.

[0023] This invention provides a high-strength specialty polyester filament fiber. It possesses the following beneficial effects:

[0024] 1. The present invention, by setting up an impregnation mechanism, drives the rolling shaft to rotate when the fiber is pulled. The rotation of the rolling shaft drives the outer wall rotating sleeve, connecting rod and agitator ball to rotate at the same time. The agitator ball agitates the liquid inside the impregnation box, generating liquid flow, so that the liquid is in continuous contact with the fiber surface, improving the impregnation uniformity and the mixing uniformity of the liquid itself, and avoiding the liquid from being static for a long time, which would cause the components to separate or precipitate, thus affecting the impregnation effect.

[0025] 2. By setting up an impregnation mechanism, when the lifting rod moves back and forth under the continuous prying of the prying ball, it will push the entire liquid down and lift it up, thereby further breaking the static state of the liquid, enhancing its internal convection, and making the functional additives evenly dispersed in the solvent. This effectively prevents the local concentration from being too high or too low, ensuring that the fiber fully and stably adsorbs the required components during the impregnation process, improving the consistency of subsequent processing and the reliability of the finished product performance.

[0026] 3. This invention, by setting up an impregnation mechanism, gradually pulls down each of the surrounding lifting rods, and then, during the ascent, sequentially drives all the surrounding lifting rods to rise, forming a wave-like linkage lifting effect. This further enhances the vertical disturbance intensity of the liquid, allowing tiny air bubbles inside the impregnation liquid to be effectively discharged, avoiding coating defects on the fiber surface. At the same time, this synchronous oscillation structure can maintain the dynamic balance of the liquid system during continuous operation, significantly improving the dispersion stability of functional additives under complex working conditions, ensuring that each fiber passing through the impregnation zone can obtain a consistent surface treatment effect, thereby guaranteeing the performance uniformity and process reliability of high-strength special polyester filament fibers in subsequent stretching, setting, and other processes.

[0027] 4. By setting up an auxiliary mechanism, when the lifting rod drives each subsequent lifting rod up and down in sequence to form a wave-like motion, the liquid is agitated by the hinge rod and the agitator plate. During the lifting of the lifting rod, the liquid is simultaneously agitated by the plate-shaped agitator plate. Its inclined surface forms a dynamic tangent with the flow direction, guiding the liquid flow to generate a spiral vortex, further breaking the laminar flow boundary, enhancing the lateral mixing efficiency, and ensuring the mixing effect.

[0028] 5. This invention, through the setting of an auxiliary mechanism and the opening of a diversion channel, allows the liquid to fully pass through the diversion channel, thereby forming multi-directional turbulence when the agitator moves up and down, enhancing the degree of turbulence inside the liquid, and enabling the functional additives to achieve efficient dispersion in three-dimensional space; the periodic movement of the agitator and the wave-like oscillation of the lifting rod work together to form a multi-scale disturbance field, significantly improving the uniformity and penetration depth of fiber surface wetting, and effectively avoiding interface defects caused by uneven local mixing; the entire system maintains dynamic stability during continuous operation, ensuring long-term reliability of the impregnation process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the immersion mechanism of the present invention. Figure 1 ;

[0031] Figure 3 This is a cross-sectional structural diagram of the wetting mechanism of the present invention;

[0032] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0033] Figure 5 This is a schematic diagram of the disassembled structure of the immersion mechanism of the present invention;

[0034] Figure 6 This is a schematic diagram of the immersion mechanism of the present invention. Figure 2 ;

[0035] Figure 7 For the present invention Figure 6 Enlarged view of point B;

[0036] Figure 8 This is a schematic diagram of the auxiliary mechanism of the present invention.

[0037] In the diagram: 1. First rotating shaft; 2. Transmission machine; 3. Immersion mechanism; 301. Rolling shaft; 302. Immersion box; 303. Top plate; 304. Rotating sleeve; 305. Connecting rod; 306. Actuating ball; 307. Lifting rod; 308. Pull rope; 309. Vertical sliding plate; 310. Base plate; 311. Telescopic rod; 4. Auxiliary mechanism; 401. Hinge rod; 402. Actuating plate; 403. Diverter trough; 5. Second rotating shaft. Detailed Implementation

[0038] Example 1: Please refer to Figure 1-3 This invention provides a technical solution: a high-strength special polyester filament fiber, whose raw material composition, by weight percentage, includes:

[0039] Polyethylene terephthalate with intrinsic viscosity of 1.0 dL / g to 1.2 dL / g: 95.5% to 98.7%;

[0040] Chain extender 0.3%–0.8%;

[0041] Nano-inorganic particles: 0.5%–2.0%;

[0042] Hydrolysis-resistant stabilizer: 0.5%–1.5%;

[0043] The content of terminal carboxyl groups in the polyethylene terephthalate is less than 30 mol / t.

[0044] Example 2: Please refer to Figure 1-6 Based on Embodiment 1, this invention provides a technical solution: Under complex working conditions, such as changes in production environment temperature and pressure, the dispersion stability of functional additives in static impregnation liquid is poor, making it difficult to maintain the dynamic balance of the liquid system. This results in inconsistent surface treatment effects for each fiber segment passing through the impregnation zone, making it difficult to guarantee the performance uniformity and process reliability of high-strength special polyester filament fibers in subsequent processes. Therefore, there is an urgent need for a method that can effectively solve the above problems. Therefore, a conveyor 2 is provided, with a first rotating shaft 1 and a second rotating shaft 5 arranged on the inner wall of the conveyor 2, and an impregnation mechanism 3 arranged on the inner wall of the conveyor 2.

[0045] The wetting mechanism 3 includes:

[0046] A rolling shaft 301 is rotatably connected to the inner wall of the conveyor 2. An impregnation box 302 is fixedly connected to the inner wall of the conveyor 2. A top plate 303 is fixedly connected to the top of the impregnation box 302. The top of the top plate 303 is triangular.

[0047] The rotating sleeve 304 is a ring-shaped sleeve structure. The inner wall of the rotating sleeve 304 is fixedly connected to the outer wall of the rolling shaft 301. The inner wall of the immersion box 302 is rotatably connected to the outer wall of the rolling shaft 301. A connecting rod 305 is fixedly connected to the outer wall of the rotating sleeve 304.

[0048] In use, high-strength special polyester filament fibers are placed in the conveyor 2, passing above the first rotating shaft 1, below the rolling shaft 301, and above the second rotating shaft 5. Then, they are smoothly pulled by subsequent rollers. When the fibers pass through the bottom of the rolling shaft 301, they will come into contact with the liquid inside the impregnation box 302, thereby achieving impregnation. After impregnation, the fibers continue to move forward, completing the impregnation of the fibers.

[0049] One end of the connecting rod 305 is fixedly connected to a toggle ball 306, which is a spherical structure.

[0050] A vertical slide plate 309 is fixedly connected to the inner wall of the immersion box 302, and a lifting rod 307 is slidably connected to the outer wall of the vertical slide plate 309. The lifting rod 307 is a circular rod-shaped structure.

[0051] The bottom of the vertical slide plate 309 is fixedly connected to a base plate 310, and the top of the base plate 310 is fixedly connected to a telescopic rod 311. One end of the telescopic rod 311 is fixedly connected to the bottom of the lifting rod 307.

[0052] The inner wall of the telescopic rod 311 is provided with a built-in spring. There are nine lifting rods 307 on the inner wall of the immersion box 302. A pull rope 308 is fixedly connected to one side of the lifting rod 307, and another lifting rod 307 is fixedly connected to the other end of the pull rope 308.

[0053] When the fiber is pulled, it will drive the rolling shaft 301 to rotate. While the rolling shaft 301 rotates, it will drive the outer wall rotating sleeve 304, the connecting rod 305, and the agitator ball 306 to rotate. The agitator ball 306 will move the liquid inside the impregnation box 302 to generate liquid flow, so that the liquid will continue to contact the fiber surface, improve the impregnation uniformity and the mixing uniformity of the liquid itself, and avoid the liquid from being static for a long time, which will cause the components to separate or precipitate, thus affecting the impregnation effect.

[0054] When the rotating sleeve 304 drives the agitator ball 306 to rotate, the agitator ball 306 agitates the liquid and also agitates the lifting rod 307. When the lifting rod 307 is agitated, it is agitated and lowered by the arc-shaped surfaces of the agitator ball 306 and the lifting rod 307 itself. It moves downward under the limit of the vertical slide plate 309. The length of the lifting rod 307 can cover the entire length of the liquid in the impregnation box 302. Therefore, when the lifting rod 307 moves back and forth under the continuous agitation of the agitator ball 306, it will press down and lift up the entire liquid, thereby further breaking the static state of the liquid, enhancing its internal convection, and making the functional additives evenly dispersed in the solvent. This effectively prevents the local concentration from being too high or too low, ensuring that the fiber fully and stably adsorbs the required components during the impregnation process, improving the consistency of subsequent processing and the reliability of the finished product performance.

[0055] Furthermore, during the rising and falling of the lifting rod 307, the surrounding lifting rods 307 are pulled up and down together via the pull rope 308, forming a coordinated movement. This causes the components of each lifting rod 307 to oscillate synchronously in the vertical direction. When the central lifting rod 307 descends, it gradually pulls each of the surrounding lifting rods 307 down. Then, during the rising process, it sequentially drives all the surrounding lifting rods 307 up, forming a wave-like linkage lifting effect. This further enhances the vertical disturbance intensity of the liquid, allowing tiny air bubbles inside the impregnation liquid to be effectively discharged, avoiding coating defects on the fiber surface. At the same time, this synchronous oscillation structure can maintain the dynamic balance of the liquid system during continuous operation, significantly improving the dispersion stability of functional additives under complex working conditions. This ensures that each fiber passing through the impregnation zone can obtain a consistent surface treatment effect, thereby guaranteeing the performance uniformity and process reliability of high-strength special polyester filament fibers in subsequent stretching, setting, and other processes.

[0056] Example 3: Please refer to Figure 1-8Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: an auxiliary mechanism 4 is provided on the outer wall of the lifting rod 307, the auxiliary mechanism 4 includes a hinge rod 401, the hinge rod 401 is rotatably connected to the outer wall of the lifting rod 307, and a toggle plate 402 is fixedly connected to the outer wall of the hinge rod 401.

[0057] The outer wall of the toggle plate 402 is provided with a flow diversion groove 403, which is a circular groove structure;

[0058] As the lifting rod 307 sequentially drives each subsequent lifting rod 307 to rise and fall, forming a wave-like motion, the liquid is propelled by the hinge rod 401 and the agitator plate 402. During the lifting and lowering of the lifting rod 307, the plate-shaped agitator plate 402 simultaneously agitates the liquid. Its inclined surface forms a dynamic tangent with the flow direction, guiding the liquid flow to generate a spiral vortex, further breaking the laminar flow boundary, enhancing the lateral mixing efficiency, and ensuring the mixing effect.

[0059] Meanwhile, the opening of the diversion channel 403 allows the liquid to fully pass through it, thereby forming multi-directional turbulence when the agitator plate 402 moves up and down, enhancing the degree of turbulence inside the liquid and enabling the functional additives to achieve efficient dispersion in three-dimensional space. The periodic movement of the agitator plate 402 and the wave-like oscillation of the lifting rod 307 work together to form a multi-scale disturbance field, significantly improving the uniformity and penetration depth of fiber surface wetting, and effectively avoiding interface defects caused by uneven local mixing. The entire system maintains dynamic stability during continuous operation, ensuring long-term reliability of the impregnation process.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-strength specialty polyester filament fiber, characterized in that, Its raw material composition, by weight percentage, includes: Polyethylene terephthalate with intrinsic viscosity of 1.0 dL / g to 1.2 dL / g: 95.5% to 98.7%; Chain extender 0.3%–0.8%; Nano-inorganic particles: 0.5%–2.0%; Hydrolysis-resistant stabilizer: 0.5%–1.5%; The polyethylene terephthalate has a terminal carboxyl group content of less than 30 mol / t, and the prepared filament fibers are placed into the conveyor (2).

2. The high-strength special polyester filament fiber according to claim 1, characterized in that: The inner wall of the conveyor (2) is provided with a first rotating shaft (1) and a second rotating shaft (5), and the inner wall of the conveyor (2) is provided with an immersion mechanism (3). The wetting mechanism (3) includes: A rolling shaft (301) is rotatably connected to the inner wall of the conveyor (2). An impregnation box (302) is fixedly connected to the inner wall of the conveyor (2). A top plate (303) is fixedly connected to the top of the impregnation box (302). The top of the top plate (303) is triangular. The rotating sleeve (304) is a ring-shaped sleeve structure. The inner wall of the rotating sleeve (304) is fixedly connected to the outer wall of the rolling shaft (301). The inner wall of the immersion box (302) is rotatably connected to the outer wall of the rolling shaft (301). A connecting rod (305) is fixedly connected to the outer wall of the rotating sleeve (304).

3. The high-strength special polyester filament fiber according to claim 2, characterized in that: One end of the connecting rod (305) is fixedly connected to a spherical ball (306).

4. The high-strength special polyester filament fiber according to claim 3, characterized in that: The inner wall of the immersion box (302) is fixedly connected to a vertical slide plate (309), and the outer wall of the vertical slide plate (309) is slidably connected to a lifting rod (307), which is a circular rod structure.

5. The high-strength special polyester filament fiber according to claim 4, characterized in that: The bottom of the vertical slide plate (309) is fixedly connected to a base plate (310), and the top of the base plate (310) is fixedly connected to a telescopic rod (311). One end of the telescopic rod (311) is fixedly connected to the bottom of the lifting rod (307).

6. The high-strength special polyester filament fiber according to claim 5, characterized in that: The inner wall of the telescopic rod (311) is provided with a built-in spring. The number of lifting rods (307) on the inner wall of the immersion box (302) is nine. A pull rope (308) is fixedly connected to one side of the lifting rod (307), and another lifting rod (307) is fixedly connected to the other end of the pull rope (308).

7. The high-strength special polyester filament fiber according to claim 6, characterized in that: An auxiliary mechanism (4) is provided on the outer wall of the lifting rod (307). The auxiliary mechanism (4) includes a hinge rod (401), which is rotatably connected to the outer wall of the lifting rod (307). A toggle plate (402) is fixedly connected to the outer wall of the hinge rod (401).

8. The high-strength special polyester filament fiber according to claim 7, characterized in that: The outer wall of the actuating plate (402) is provided with a diversion groove (403), which is a circular groove structure.

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