Composite skin-friendly skin-core tpu fiber monofilament with high heat resistance and shrinkage resistance and preparation equipment

Abstract

The invention relates to the technical field of tpu fiber monofilaments and preparation equipment, in particular to a high-heat-resistance anti-shrinkage composite skin-friendly skin-core tpu fiber monofilament and preparation equipment, the high-heat-resistance anti-shrinkage composite skin-friendly skin-core tpu fiber monofilament comprises a mixing box body and a feeding hopper, a box cover is detachably mounted at the top of the mixing box body, and a stirring assembly is rotatably mounted in the mixing box body; the stirring assembly comprises an upper-layer stirring rod and a lower-layer stirring rod, the upper end of the lower-layer stirring rod is detachably connected with the upper-layer stirring rod, inclined stirring blades are rotatably installed on the side portion of the lower-layer stirring rod, and an adjusting assembly used for driving the inclined stirring blades to adjust the angle is arranged in the lower-layer stirring rod. According to the TPU and TPEE particle mixing device, TPU and TPEE particles of raw materials can be efficiently mixed, the raw materials bonded into blocks can be fully scattered, the particles can be blown towards the stirring assembly through the blowing assembly, and the raw material particles can be fully blown away through the blowing heads capable of rotating in the opposite directions, so that accumulation is avoided.

Description

Technical Field

[0001] This invention relates to the technical field of TPU fiber monofilaments and preparation equipment, and in particular to a high heat-resistant, shrinkage-resistant, skin-friendly composite core-sheath TPU fiber monofilament and preparation equipment. Background Technology

[0002] In the fields of textiles, medical devices, and sporting goods, there is an increasing demand for elastic fibers that combine high heat resistance, shrinkage resistance, and skin-friendly properties. Among them, thermoplastic polyurethane (TPU) fibers have become one of the core raw materials for skin-friendly textile products due to their excellent flexibility and resilience. However, pure TPU fibers have relatively weak heat resistance and shrinkage resistance, and are prone to dimensional deformation and strength reduction under high-temperature washing, drying, or long-term heat exposure, which limits their application in high-end textile fields (such as sportswear and medical elastic bandages).

[0003] To improve the heat resistance of TPU fibers, the industry often adopts a blending or composite approach with high heat-resistant elastomers. Thermoplastic polyester elastomers (TPEE) have excellent heat resistance and shrinkage resistance due to the stability of the hard segment crystalline microregions in their molecular chains at high temperatures, making them an ideal material for composite with TPU. Currently, the mainstream composite scheme is a core-sheath structure design—using TPEE as the core layer to provide heat-resistant support and TPU as the sheath layer to ensure a skin-friendly feel. The core and sheath work together to achieve complementary performance. However, in the preparation of this type of core-sheath TPU fiber monofilament, existing technologies still face many key bottlenecks, specifically in the following two aspects: I. Raw material pretreatment stage: Insufficient mixing uniformity and dispersion effect The performance stability of core-sheath fibers is highly dependent on the uniformity of mixing of TPU, TPEE raw materials, and functional additives (such as heat stabilizers and antioxidants). Existing preparation equipment mostly uses a single mixing tank for raw material mixing, which has two major drawbacks: Clumped raw materials are difficult to break up effectively: TPU granules are prone to sticking together during storage due to moisture absorption or temperature changes. TPEE granules and powdered additives (such as heat stabilizers) also often agglomerate. Traditional mixing equipment lacks a targeted breaking-up structure and relies solely on the rotation and tumbling of the mixing blades, which cannot break up clumped raw materials with a diameter greater than 10mm. As a result, when clumped raw materials enter the subsequent extrusion process, they are prone to uneven local composition, ultimately leading to fluctuations in the heat resistance of the fibers (such as excessive local heat shrinkage) or a decrease in skin-friendliness (uneven distribution of TPU in the skin layer).

[0004] Raw materials tend to accumulate and have low mixing efficiency: During feeding, raw materials mostly fall directly into the mixing tank by gravity, easily accumulating on the tank walls or in the blind areas of the mixing blades. This is especially true when there is a significant density difference between powdered additives and granular raw materials (e.g., antioxidants have a density of approximately 1.2 g / cm³, while TPU granules have a density of approximately 1.1 g / cm³), easily leading to a stratification phenomenon where "powder floats and granules sink." Existing equipment lacks a structure to guide the uniform dispersion of raw materials, requiring extended mixing time (usually exceeding 60 minutes) to improve mixing. This not only reduces production efficiency but may also cause raw material wear and temperature increases due to prolonged mixing, affecting subsequent spinning performance.

[0005] II. Mixing and Stirring Stage: Limitations in Compatibility and Dispersion Effect Existing mixing components mostly use fixed-structure mixing blades, which makes it difficult to adapt to TPU / TPEE mixing systems with different viscosities and ratios. The specific problems are as follows: The mixing blade structure cannot form efficient turbulence: Traditional transverse mixing blades are mostly flat plates without holes. During mixing, they can only achieve the overall tumbling of the raw materials and cannot form effective shearing and diversion of the materials. Although some equipment has slots of fixed size on the mixing blades, the slot specifications are uniform and cannot adjust the turbulence intensity according to the viscosity of the raw materials. As a result, low-viscosity raw materials are prone to mixing "dead zones", and high-viscosity raw materials are prone to agglomeration due to insufficient shear force. The mixing uniformity is difficult to exceed 90%, which directly affects the stability of the fiber core-sheath structure.

[0006] The stirring angle is not adjustable, resulting in poor adaptability: The viscosity of the TPU and TPEE mixture changes with the ratio and temperature (e.g., the viscosity decreases when the TPU ratio increases, and the viscosity increases when the TPEE ratio increases). The stirring blade angle of the existing stirring components is fixed, and the stirring mode cannot be adjusted according to the viscosity. For low-viscosity raw materials, the stirring blade with a fixed angle has a weak pushing effect and the raw material circulation speed is slow. For high-viscosity raw materials, the shear force is insufficient to break up agglomerates, making it difficult for the same equipment to be compatible with the production of core-sheath fibers with different ratios, thus limiting the equipment's versatility.

[0007] In summary, the current field of high heat-resistant core-sheath TPU fiber monofilament preparation urgently needs an integrated equipment that can achieve "agglomeration and dispersal - uniform feeding - efficient mixing - viscosity matching" to solve problems such as uneven raw material mixing, poor mixing adaptability, and low production efficiency. This will ensure that the heat resistance, shrinkage resistance, and skin-friendly feel of the core-sheath fiber meet the standards in a coordinated manner, and promote its large-scale application in the high-end textile field. Summary of the Invention

[0008] To overcome the technical defects of the existing technology, the present invention provides a high heat-resistant and shrinkage-resistant composite skin-friendly TPU fiber monofilament and preparation equipment, which can facilitate the dispersing and efficient stirring of raw materials.

[0009] The technical solution adopted in this invention is as follows: it includes a skin layer and a core layer, wherein the skin layer is wrapped around the outside of the core layer, the core layer is made of thermoplastic polyester elastomer, the skin layer is made of thermoplastic polyurethane elastomer, and the weight ratio of the skin layer to the core layer is 8:2.

[0010] A device for preparing high heat-resistant and shrinkage-resistant composite skin-friendly TPU fiber monofilaments includes a mixing chamber and a feeding hopper. The top of the mixing chamber is detachably covered, and a stirring assembly is rotatably installed inside the mixing chamber. The stirring assembly includes an upper stirring rod and a lower stirring rod. The upper stirring rod is provided with a transverse stirring blade. The upper end of the lower stirring rod is detachably connected to the upper stirring rod. An inclined stirring blade is rotatably installed on the side of the lower stirring rod. An adjustment assembly for driving the inclined stirring blade to adjust its angle is provided inside the lower stirring rod. The feed hopper is equipped with a crushing component for crushing materials, and a blowing component is fixedly installed on the bottom surface of the lower end of the feed hopper.

[0011] Preferably, the mixing chamber and the lid are connected by high-strength bolts.

[0012] Preferably, the stirring assembly further includes a drive motor, which is fixedly mounted on the top of the box cover via a frame. The output end of the drive motor is fixedly connected to the upper end of the upper stirring rod, and the transverse stirring blades are uniformly fixedly mounted on the outer circumferential surface of the upper stirring rod.

[0013] Preferably, the transverse stirring blade is provided with rectangular grooves at equal intervals along its length direction, the rectangular grooves having a linear side width from one end of the transverse stirring blade to the other end, and multiple arc-shaped protrusions are provided on both sides of the transverse stirring blade along its length direction to generate secondary vortices.

[0014] Preferably, the lower end of the upper stirring rod has a threaded inner hole, and the upper end of the lower stirring rod is fixedly installed with a threaded rod, which is screwed into the threaded inner hole. A pin bracket is fixedly installed on the upper side wall of the lower stirring rod, and a plug rod is slidably installed inside the pin bracket. A spring is fixedly installed on the plug rod, and one end of the spring is fixedly connected to the pin bracket. A cross rod is fixedly installed on one end of the plug rod, and an inner cross cylinder is sleeved on the cross rod. One end of the inner cross cylinder is fixedly connected to the upper stirring rod.

[0015] Preferably, the lower stirring rod has a hollow internal structure, the adjustment assembly includes an adjustment motor, the adjustment motor is fixedly installed inside the upper end of the lower stirring rod, a worm gear is fixedly installed at the output end of the adjustment motor, a turbine is fixedly installed at one end of the inclined stirring blade, the turbine is fixedly installed on the outside of the lower stirring rod by a mounting bracket, and the turbine and the worm gear mesh with each other.

[0016] Preferably, the crushing assembly includes a crushing roller and a crushing motor. The crushing roller is symmetrically rotated and installed inside the feed hopper. The crushing motor is fixedly installed on one side of the feed hopper. Each end of the crushing roller is provided with a synchronous gear. The synchronous gears mesh with each other for transmission. The crushing motor is fixedly connected to one of the synchronous gears.

[0017] Preferably, the blowing assembly includes a blower and a blower frame. The blower is fixedly installed on the box cover, and the blower frame is fixedly installed at the lower end inside the feed hopper. Blower heads are symmetrically and rotatably installed inside the blower frame. A synchronous half gear is fixedly installed at one end of each blower head. A rotary motor is fixedly installed on one of the synchronous half gears. The rotary motor is fixedly connected to the blower frame. One end of each of the two blower heads is connected to the blower through a blower pipe.

[0018] The beneficial effects of the present invention are: 1. By setting up the crushing component and the blowing component, the raw materials can be efficiently mixed with TPU and TPEE particles, and the raw materials that are stuck together can be fully dispersed. The blowing component can blow the particles towards the stirring component, and the blowing head that can rotate in opposite directions can make the raw material particles fully dispersed, thereby avoiding accumulation.

[0019] This device uses horizontal stirring blades around the upper stirring rod to fully stir the raw materials. The linearly widening rectangular groove creates gradient turbulence when cutting the materials, and the arc-shaped protrusions generate secondary eddies as the materials flow through, further enhancing the dispersion effect.

[0020] By adjusting the combination of the components and the inclined stirring blades, the stirring angle of the inclined stirring blades on the lower stirring rod can be easily adjusted, thereby enabling the use of raw materials with different viscosities (adjusting the angle to increase the flow when the viscosity is low, and adjusting the angle to increase the shear force when the viscosity is high). Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a half-sectional view of the present invention.

[0023] Figure 3 This is a schematic diagram showing the distribution of the transverse stirring blades according to the present invention.

[0024] Figure 4 This is a schematic diagram showing the position of the turbine in this invention.

[0025] Figure 5 This is a schematic diagram showing the position of the rotary motor of the present invention.

[0026] Figure 6 This is a schematic diagram showing the position of the crushing motor of the present invention.

[0027] Figure 7 This is a schematic diagram showing the connection between the adjusting motor and the worm gear of the present invention.

[0028] Figure 8 This is a top view of the present invention.

[0029] Figure 9 for Figure 2 Enlarged view of the structure at point A in the middle.

[0030] Figure 10 for Figure 3 Enlarged view of the structure at point B.

[0031] Figure 11 for Figure 3 Enlarged view of the structure at point C.

[0032] Figure labeling: 1. Skin layer; 2. Core layer; 3. Mixing box; 4. Feed hopper; 5. Box cover; 6. Mixing assembly; 601. Upper mixing rod; 602. Lower mixing rod; 603. Horizontal mixing blade; 604. Inclined mixing blade; 605. Drive motor; 606. Frame; 607. Rectangular groove; 608. Arc-shaped protrusion; 609. Threaded rod; 610. Pin holder; 611. Insert rod; 612. Spring 613. Cross bar; 614. Inner cross cylinder; 7. Adjustment assembly; 701. Adjustment motor; 702. Worm gear; 703. Turbine; 8. Crushing assembly; 801. Crushing roller; 802. Crushing motor; 803. Synchronous gear; 9. Blowing assembly; 901. Blower; 902. Blower frame; 903. Blower head; 904. Synchronous half gear; 905. Rotary motor; 906. Blower pipe; 10. High-strength bolts. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-11As shown, this embodiment provides a high heat-resistant, shrinkage-resistant, skin-friendly composite TPU fiber monofilament and its preparation equipment, including a sheath layer 1 and a core layer 2. The sheath layer 1 is wrapped around the core layer 2. The core layer 2 is composed of thermoplastic polyester elastomer, and the sheath layer 1 is composed of thermoplastic polyurethane elastomer. The weight ratio of the sheath layer 1 to the core layer 2 is 8:2. It should be noted that the special crystalline structure of the hard segments of TPEE (i.e., thermoplastic polyester elastomer) allows the crystalline micro-regions to remain stable at high temperatures and play a role in physical cross-linking. TPU (i.e., thermoplastic polyurethane elastomer) has flexible soft segments that are easily curled and stretched, with good resilience and a soft touch. The two are combined for cooling in a supercooled water bath, with a draw ratio of 5 in the hot water bath. The fiber exhibits high strength modulus and yield strength. After being stretched twice, it undergoes a post-drying oven setting temperature of 160°C. This setting process allows the molecular chains to gain sufficient mobility, enabling stress release and structural reorganization, resulting in a core-sheath TPU fiber monofilament with high heat resistance and a skin-friendly feel. The preparation of this fiber monofilament requires pre-mixing TPU particles with TPEE particles and 5% heat stabilizer and antioxidant. The mixed raw material particles are then fed into a twin-screw extruder and fused through a spinneret to form the core-sheath monofilament. Because the main innovation of this device lies in the pre-mixing of raw materials, the internal structure of the subsequent melt composite spinning (twin-screw extruder), cooling and stretching (hot and cold water baths and multi-stage stretching machine), and setting and winding (hot air setting oven) processes is not described.

[0034] A device for preparing high heat-resistant and shrinkage-resistant composite skin-friendly TPU fiber monofilament includes a mixing chamber 3 and a feeding hopper 4. The top of the mixing chamber 3 is detachably covered with a cover 5, and a stirring assembly 6 is rotatably installed inside the mixing chamber 3. The stirring assembly 6 includes an upper stirring rod 601 and a lower stirring rod 602. The upper stirring rod 601 is provided with a transverse stirring blade 603. The upper end of the lower stirring rod 602 is detachably connected to the upper stirring rod 601. An inclined stirring blade 604 is rotatably mounted on the side of the lower stirring rod 602. An adjustment assembly 7 for driving the inclined stirring blade 604 to adjust the angle is provided inside the lower stirring rod 602. The feed hopper 4 is equipped with a crushing component 8 for crushing materials, and a blowing component 9 is fixedly installed on the bottom surface of the lower end of the feed hopper 4.

[0035] The mixing chamber 3 and the cover 5 are connected by high-strength bolts 10. It should be noted that these bolts consist of 4 sets of M12 bolts.

[0036] The stirring assembly 6 also includes a drive motor 605, which is fixedly mounted on the top of the cover 5 via a frame 606. The output end of the drive motor 605 is fixedly connected to the upper end of the upper stirring rod 601. Transverse stirring blades 603 are evenly fixedly mounted on the outer circumference of the upper stirring rod 601. Rectangular grooves 607 are evenly spaced along the length of each transverse stirring blade 603, with a linear side width from one end to the other. Multiple arc-shaped protrusions 608 are provided on both sides of each transverse stirring blade 603 along its length to produce… To generate secondary eddies, it is important to note that in order to improve the mixing effect on the raw material particles, multiple sets of transverse stirring blades 603 are uniformly welded to the outer circumference of the upper stirring rod 601 (20mm in diameter and 300mm in length). The transverse stirring blades 603 are rectangular stainless steel plates with multiple rectangular grooves 607 evenly spaced along their length. The rectangular grooves 607 gradually widen from one end of the stirring blade (near the stirring rod) to the other end (near the box wall), with the width gradually changing from 10mm to 20mm. In addition, multiple arc-shaped protrusions 608 are welded to both sides of the stirring blade along the length to generate secondary eddies during mixing and enhance the mixing effect.

[0037] The lower end of the upper stirring rod 601 has a threaded inner hole. The upper end of the lower stirring rod 602 is fixedly installed with a threaded rod 609, which is screwed into the threaded inner hole. A pin holder 610 is fixedly installed on the upper side wall of the lower stirring rod 602. A plug rod 611 is slidably installed inside the pin holder 610. A spring 612 is fixedly installed on the plug rod 611. One end of the spring 612 is fixedly connected to the pin holder 610. A cross rod 613 is fixedly installed on one end of the plug rod 611. An inner cross cylinder is sleeved on the cross rod 613. One end of the inner cross cylinder is fixedly connected to the upper stirring rod 601. It should be noted that the threaded rod 609 (50mm in length, M18×2 thread specification) welded to the upper end of the lower stirring rod 602 is screwed into the threaded inner hole of the lower end of the upper stirring rod 601 to a depth of 60mm, thus achieving a preliminary connection. Meanwhile, two pin brackets 610 (5mm thick) are welded to the upper side wall of the lower stirring rod 602. A rod 611 with a diameter of 8mm is slidably installed inside the pin bracket 610. A spring 612 (12mm in diameter and 30mm in free length) is sleeved on the rod 611. One end of the spring 612 is welded to the pin bracket 610 and fixed, and the other end is welded to the limiting ring in the middle of the rod 611. One end of the insert rod 611 is welded with a cross rod 613, which can be inserted into the inner cross cylinder (20mm deep) on the side wall of the upper stirring rod 601 to form a double fixation of "thread + cross positioning" to prevent the lower stirring rod 602 from loosening during stirring.

[0038] The lower stirring rod 602 has a hollow internal structure. The adjustment assembly 7 includes an adjustment motor 701, which is fixedly installed inside the upper end of the lower stirring rod 602. A worm gear 702 is fixedly installed at the output end of the adjustment motor 701. A turbine 703 is fixedly installed at one end of the inclined stirring blade 604. The turbine 703 is fixedly installed on the outside of the lower stirring rod 602 via a mounting bracket. The turbine 703 and the worm gear 702 mesh with each other. It should be noted that the lower stirring rod 602 has a hollow internal structure with an inner diameter of 12mm. The upper end is fixedly mounted with an adjustment motor 701 (micro stepper motor) by a bracket. The output end of the adjustment motor 701 is welded with a worm gear 702 (module 1, number of heads 1). The worm gear 702 meshes with a turbine 703 (module 1, number of teeth 20) at one end of the inclined stirring blade 604. The inclined stirring blade 604 (length 120mm, width 40mm, thickness 3mm) is rotatably mounted on the side of the lower stirring rod 602 by a mounting bracket (4 sets in total, symmetrically distributed). A deep groove ball bearing (model 608, not shown in the figure) is installed between the turbine 703 and the mounting bracket to ensure smooth adjustment of the stirring blade angle, with an adjustment range of 30°-60° (angle with the horizontal direction).

[0039] The crushing assembly 8 includes a crushing roller 801 and a crushing motor 802. The crushing roller 801 is symmetrically rotated and installed inside the feed hopper 4. The crushing motor 802 is fixedly installed on one side of the feed hopper 4. Each end of the crushing roller 801 is provided with a synchronous gear 803, which meshes with each other for transmission. The crushing motor 802 is fixedly connected to one of the synchronous gears 803. It should be noted that the crushing motor 802 needs to be connected to the feed hopper 4 through a motor frame (which is a common structural design in the market and is not shown in this device). The blowing assembly 9 includes a blower 901 and a blower frame 902. The blower 901 is fixedly installed on the cover 5, and the blower frame 902 is fixedly installed at the lower end inside the feed hopper 4. Inside the blower frame 902, blower heads 903 are symmetrically and rotatably mounted. Each blower head 903 has a synchronous half-gear 904 fixedly mounted at one end. A rotary motor 905 is fixedly mounted on one of the synchronous half-gears 904. The rotary motor 905 is fixedly connected to the blower frame 902 (this rotary motor 905 is also fixedly connected to the blower frame 902 via a motor frame). One end of each of the two blower heads 903 is connected to the blower 901 via a blower pipe 906. It should be noted that the feed hopper 4 (made of transparent PC, 10L capacity) is fixed above the feed inlet (150mm in diameter) on one side of the cover 5 via a flange. Inside the feed hopper 4, two sets of crushing rollers 801 (80mm in diameter) are symmetrically and rotatably mounted. The crushing roller 801 (140mm in length) has uniformly distributed irregular teeth (tooth height 5mm, tooth pitch 10mm) on its surface. The two sets of crushing rollers 801 rotate in opposite directions (linear speed 0.5m / s). One end is driven by a synchronous gear 803. A square blower frame 902 is welded to the bottom of the feed hopper 4. Two blower heads 903 (ABS material, 10mm outlet diameter) are symmetrically mounted inside the blower frame 902 via bearings. A synchronous half gear 904 (module 2, number of teeth 30) is welded to one end of each blower head 903. The two half gears mesh with each other. One half gear shaft is fixed to the output end of a rotary motor 905 (power 10W, speed 0-30r / min). The other end of the blower head 903 is connected to... The PU blower tube 906, with an inner diameter of 8mm, is connected to the blower 901 (air pressure 0.4MPa, air volume 50m³ / h) on the top of the box cover 5 to ensure that the airflow speed is stable at 15-20m / s, thereby continuously dispersing the dispersed raw materials. The opposing movement of the blower heads 903 enhances the dispersing effect on the materials. The lower end of the mixing box 3 of this device is equipped with a discharge solenoid valve (not labeled in the figure) to facilitate the discharge of materials. The premixed raw materials are then discharged into the twin-screw extruder, cooled by a hot and cold water bath, stretched by a stretching machine, and dried and shaped by a hot air setting oven to obtain a high heat-resistant, shrinkage-resistant, skin-friendly TPU fiber monofilament.

[0040] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A high-heat-resistant anti-shrinkage composite skin-feel core-sheath TPU fiber monofilament and preparation equipment, comprising a sheath layer (1) and a core layer (2), characterized in that: The skin layer (1) is arranged outside the core layer (2), the core layer (2) is made of thermoplastic polyester elastomer, the skin layer (1) is made of thermoplastic polyurethane elastomer, and the weight ratio of the skin layer (1) to the core layer (2) is 8:

2.

2. The preparation equipment of high heat-resistant and shrink-resistant composite skin-friendly core-sheath TPU fiber monofilament according to claim 1, comprising a mixing box (3) and a feeding hopper (4), a box cover (5) is detachably installed on the top of the mixing box (3), characterized in that: A stirring assembly (6) is rotatably arranged in the mixing box (3); The stirring assembly (6) comprises an upper stirring rod (601) and a lower stirring rod (602), the upper stirring rod (601) is provided with transverse stirring blades (603), the upper end of the lower stirring rod (602) is detachably connected with the upper stirring rod (601), the side of the lower stirring rod (602) is rotatably provided with inclined stirring blades (604), and the lower stirring rod (602) is provided with an adjusting assembly (7) for driving the inclined stirring blades (604) to adjust the angle. The feeding hopper (4) is provided with a crushing assembly (8) for crushing materials, and the lower end of the feeding hopper (4) is fixedly provided with a blowing assembly (9).

3. The high heat resistant anti-shrinkage composite skin-feel-to-skin composite core TPU fiber monofilament and preparation equipment according to claim 2, characterized in that: The mixing box (3) and the box cover (5) are connected through high-strength bolts (10).

4. The high heat resistant anti-shrinkage composite skin-feel-in-skin TPu fiber monofilament and preparation equipment according to claim 2, characterized in that: The stirring assembly (6) further comprises a driving motor (605), the driving motor (605) is fixedly arranged on the top of the box cover (5) through a rack (606), the output end of the driving motor (605) is fixedly connected with the upper end of the upper stirring rod (601), and the transverse stirring blades (603) are uniformly fixedly arranged on the outer circumferential surface of the upper stirring rod (601).

5. The high heat resistant anti-shrinkage composite skin-feel- friendly pi-core tpu fiber monofilament and preparation equipment according to claim 4, characterized in that: The transverse stirring blades (603) are provided with rectangular grooves (607) at equal intervals along the length direction, the rectangular grooves (607) are linearly widened from one end of the transverse stirring blades (603) to the other end, and a plurality of arc-shaped protrusions (608) are arranged on the two sides of the transverse stirring blades (603) along the length direction, so that secondary vortex is generated.

6. The high heat resistant anti-shrinkage composite skin-feel-in-skin tpu core-sheath fiber monofilament and preparation equipment according to claim 5, characterized in that: The lower end of the upper stirring rod (601) is provided with a threaded hole, the upper end of the lower stirring rod (602) is fixedly provided with a threaded rod (609), the threaded rod (609) is screwed into the threaded hole, the upper end of the lower stirring rod (602) is fixedly provided with a bolt holder (610), the bolt holder (610) is slidably provided with a bolt (611), the bolt (611) is fixedly provided with a spring (612), one end of the spring (612) is fixedly connected with the bolt holder (610), one end of the bolt (611) is fixedly provided with a cross rod (613), a cross cylinder is sleeved on the cross rod (613), and one end of the cross cylinder is fixedly connected with the upper stirring rod (601).

7. The high heat resistant anti-shrinkage composite skin-feel-hugging core-spun TPU fiber monofilament and preparation equipment according to claim 6, characterized in that: The lower stirring rod (602) has a hollow structure inside. The adjustment component (7) includes an adjustment motor (701). The adjustment motor (701) is fixedly installed inside the upper end of the lower stirring rod (602). A worm gear (702) is fixedly installed at the output end of the adjustment motor (701). A turbine (703) is fixedly installed at one end of the inclined stirring blade (604). The turbine (703) is fixedly installed on the outside of the lower stirring rod (602) by a mounting bracket. The turbine (703) and the worm gear (702) mesh with each other.

8. The high heat resistant anti-shrinkage composite skin-feel-in-skin tpu core-sheath fiber monofilament and preparation equipment according to claim 2, characterized in that: The crushing assembly (8) includes a crushing roller (801) and a crushing motor (802). The crushing roller (801) is symmetrically rotated and installed inside the feed hopper (4). The crushing motor (802) is fixedly installed on one side of the feed hopper (4). One end of each crushing roller (801) is provided with a synchronous gear (803). The synchronous gears (803) mesh with each other for transmission. The crushing motor (802) is fixedly connected to one of the synchronous gears (803).

9. The high heat resistant anti-shrinkage composite skin-feel-hugging core-spun TPU fiber monofilament according to claim 2, characterized in that: The blowing assembly (9) includes a blower (901) and a blower frame (902). The blower (901) is fixedly installed on the box cover (5). The blower frame (902) is fixedly installed at the lower end inside the feed hopper (4). Blower heads (903) are symmetrically rotated inside the blower frame (902). A synchronous half gear (904) is fixedly installed at one end of each blower head (903). A rotary motor (905) is fixedly installed on one of the synchronous half gears (904). The rotary motor (905) is fixedly connected to the blower frame (902). One end of each of the two blower heads (903) is connected to the blower (901) through a blower pipe (906).

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