Preparation method of elastic spiral fiber wound with filaments and elastic spiral fiber

Abstract

The invention provides a preparation method of an elastic spiral fiber wound with filaments and the elastic spiral fiber. The method comprises the following steps: straightening and twisting the elastic spiral fiber according to a preset tensile strain multiple and a preset twisting amount; the two ends of the straightened and twisted elastic spiral fiber are fixed to a filament winding device; a prediction formula between the moving speed of a winding device and the tightening degree of the filament is constructed according to the fiber screw diameter, the fiber screw pitch and the fiber diameter of the elastic spiral fiber, the spiral hand relation between the fiber and the filament, the tensile strain multiple, the torsion amount, the filament diameter and the rotating speed of the winding device. The target moving speed of the winding equipment corresponding to the tightening degree of the target filament is obtained; according to the winding rotation speed and the target moving speed, winding equipment and moving equipment of the filament winding device are started, and the target elastic spiral fiber wound with the filaments can be accurately obtained, wherein the actual filament tightening degree of the target elastic spiral fiber corresponds to the target filament tightening degree in the relaxed state.

Description

Technical Field

[0001] This application relates to the technical field of elastic fiber processing and preparation, specifically to a method for preparing elastic spiral fibers by winding fine filaments and the elastic spiral fibers themselves. Background Technology

[0002] Helical fibers, sharing a similar structure with helical materials such as plant tendrils and springs, possess a helical structure that can unwind under tension, granting them excellent stretchability and resilience. Elastic helical fibers composed of elastic materials (such as silicone rubber, polyurethane, and hydrogels) can be further stretched even after their helical structure is fully unwound, thus exhibiting superior flexibility and stretchability compared to metal springs. In recent years, due to their unique mechanical properties, elastic helical fibers have found applications in stretchable fiber electronic devices and functional fabrics. For example, conductive elastic helical fibers can maintain conductivity over a wide range of stretchability, showing potential for applications such as stretchable wires and large-amplitude strain sensors.

[0003] For any helical fiber, its pitch and diameter are key factors affecting its structure, mechanical properties, and application functions. Therefore, it is necessary to establish methods to effectively control its pitch and diameter. Furthermore, if elastic helical fibers can respond to external stimuli and undergo controllable, real-time, and reversible deformation of their pitch and diameter, they will have application potential in fields such as tendril bionic actuators, soft robots, and flexible sensors. Therefore, the ability to control the pitch and diameter of elastic helical fibers on demand, and even endow them with the structural deformation capability to respond to stimuli, has research and application value.

[0004] Existing methods typically employ winding and twisting techniques to prepare elastic helical fibers. For example, by winding or twisting thermoplastic elastic fibers, a helical structure can be temporarily imparted, which can then be further shaped by heating and cooling to achieve specific pitch and diameter. For pre-prepared elastic helical fibers, the pitch and diameter can be controlled in real time through winding or twisting, but both require external force to maintain the structure; the original helical structure will revert to its original state after the external force is removed. Some stimulus-responsive helical fibers, such as thermoresponsive nylon helical fibers, can exhibit changes in pitch and diameter upon heating and have been used in recent years to develop novel actuators; however, this method is only applicable to a few polymer fibers with this stimulus-responsiveness, such as nylon. Therefore, all of the above methods for controlling the structure of elastic helical fibers on demand have certain limitations. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings and deficiencies of the prior art and to provide a method for preparing elastic spiral fibers with wound filaments and elastic spiral fibers.

[0006] The first aspect of this application provides a method for preparing an elastic helical fiber with wound filaments, comprising:

[0007] The elastic helical fiber is straightened and twisted according to the preset tensile strain ratio and torsion amount;

[0008] The two ends of the straightened and twisted elastic helical fiber are fixed to a filament winding device; the filament winding device includes a winding device for releasing filaments while rotating around the elastic helical fiber, and a moving device for translating the winding device;

[0009] Based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, the tensile strain multiple, the torsion amount, the filament diameter, and the winding rotation speed of the winding device, a predictive formula is constructed between the moving speed of the winding device and the tightness of the filament.

[0010] Based on the prediction formula, the target moving speed of the winding device corresponding to the tightness of the target filament is obtained;

[0011] Based on the winding rotation speed and the target moving speed, the winding device and the moving device of the filament winding device are started, so that the winding device rotates around the elastic spiral fiber according to the winding rotation speed, and the moving device drives the winding device to translate according to the target moving speed, so as to wind the filament around the elastic spiral fiber to obtain the target elastic spiral fiber with the filament wound around it; wherein, the actual filament tightness in the relaxed state of the target elastic spiral fiber corresponds to the target filament tightness.

[0012] As one implementation, the step of constructing a predictive formula between the winding equipment's moving speed and the filament tightness based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, the tensile strain ratio, the amount of torsion, the filament diameter, and the winding rotation speed of the winding equipment includes:

[0013] Based on the fiber diameter and the fiber pitch, the length of each spiral turn of the elastic helical fiber in its initial state is obtained;

[0014] Based on the elastic helical fiber pitch, fiber diameter, helical chirality relationship between fiber and filament, tensile strain multiple, torsion amount, filament diameter, winding rotation speed of the winding device, and helical length per turn, a predictive formula is constructed for the relationship between the moving speed of the winding device and the tightness of the filament.

[0015] As one implementation, if the elastic helical fiber and the filament have the same helical chirality, the prediction formula is:

[0016]

[0017] in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This represents the amount of twist of the elastic helical fiber.

[0018] As one implementation, if the helical chirality of the elastic helical fiber is opposite to that of the filament, the prediction formula is:

[0019]

[0020] in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This represents the amount of twist in the elastic helical fiber. Among them, The definition is the number of turns added per spiral of an elastic helical fiber.

[0021] As one implementation method, the helical chiral relationship is obtained through the following steps:

[0022] When it is necessary to increase the diameter, decrease the pitch, reduce the total number of turns, and decrease the total length of the target elastic helical fiber wound with filaments, a filament winding direction with the same helical chirality as the elastic helical fiber is adopted to obtain a helical chirality relationship where the fiber and the filament have the same helical chirality.

[0023] When it is necessary to reduce the diameter, increase the pitch, increase the total number of turns, and increase the total length of the target elastic helical fiber wound with filaments, a filament winding direction opposite to the helical chirality of the elastic helical fiber is adopted to obtain a helical chirality relationship between the fiber and the filament with opposite helical chirality.

[0024] As one implementation, after obtaining the target elastic helical fiber wound with fine filaments, the method further includes:

[0025] The target elastic helical fiber wrapped with filaments is expanded by swelling or thermal expansion to dynamically increase the actual filament tightness of the target elastic helical fiber wrapped with filaments, so that the diameter, pitch, total number of turns and total length of the target elastic helical fiber wrapped with filaments with the same or opposite helical chirality respond to the swelling or thermal expansion stimulus.

[0026] As one implementation, after obtaining the target elastic helical fiber wound with fine filaments, the method further includes:

[0027] By drying or cold shrinking the target elastic helical fiber wound with filaments, the actual filament tightness of the target elastic helical fiber wound with filaments is dynamically reduced, so that the diameter, pitch, total number of turns and total length of the target elastic helical fiber wound with filaments with the same or opposite helical chirality respond to the drying or cold shrinking stimulus.

[0028] As one implementation method, the steps of straightening and twisting the elastic helical fiber according to a preset tensile strain multiple and torsion amount include:

[0029] The tensile strain multiple and torsion amount are obtained based on the tightness of the target filament and the pitch of the target filament; wherein, the pitch of the target filament is the pitch of the filament wound around the target elastic helical fiber when the target elastic helical fiber is in a relaxed state.

[0030] In one embodiment, the filament is a conductive filament.

[0031] Compared to related technologies, the method for preparing elastic helical fibers by winding filaments in this application involves straightening and twisting the elastic helical fibers according to a preset tensile strain multiple and torsion amount. The straightened and twisted ends of the elastic helical fibers are then fixed to a filament winding device. Furthermore, a predictive formula is constructed based on the fiber diameter, fiber pitch, fiber diameter, the helical chirality relationship between the fiber and the filament, the tensile strain multiple, the torsion amount, the filament diameter, and the winding rotation speed of the winding device, to predict the relationship between the moving speed of the winding device and the tightness of the filament. This predictive formula is used to obtain the target moving speed corresponding to the target tightness of the filament, and then... Based on the winding rotation speed and the target moving speed, the winding device and the moving device of the filament winding device are started, so that the winding device rotates around the elastic spiral fiber according to the winding rotation speed, and the moving device drives the winding device to translate according to the target moving speed, so as to wind the filament around the elastic spiral fiber, thereby obtaining the target elastic spiral fiber with the filament wound around it. The target elastic spiral fiber with the filament wound around it is obtained with the actual filament tightness in the relaxed state corresponding to the target filament tightness. Thus, the target elastic spiral fiber with the actual filament tightness in the relaxed state corresponding to the target filament tightness is efficiently and accurately prepared.

[0032] A second aspect of this application provides an elastic spiral fiber with wound filaments, which is prepared by the preparation method described above.

[0033] To provide a clearer understanding of this application, the specific embodiments of this application will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0034] Figure 1 This is a flowchart illustrating a method for preparing an elastic spiral fiber from wound filaments according to an embodiment of this application.

[0035] Figure 2 This is a photograph of an elastic spiral fiber wrapped around a filament in a relaxed state, when the fiber and the filament have the same or opposite helical chirality, according to one embodiment of this application.

[0036] Figure 3 This is a curve showing the relationship between the tightness of the filament and the moving speed of the winding device, obtained by prediction formula under different tensile strain ratios according to one embodiment of this application.

[0037] Figure 4 This embodiment of the present application shows an elastic spiral fiber of wound filament prepared by measuring the moving speed of the winding device when the filament tightness is equal to zero under different tensile strain ratios, using the predicted formula, to verify the filament tightness obtained by the predicted formula.

[0038] Figure 5 This is a curve showing the relationship between the tightness of the filament and the moving speed of the winding device under different torsion amounts, obtained by a prediction formula, according to one embodiment of this application.

[0039] Figure 6 This is a photograph of an elastic spiral fiber of wound filament prepared by using a fixed winding device with a fixed moving speed, under different torsion amounts and when the helical chirality of the fiber and filament is the same, in one embodiment of this application, to verify the effect of the torsion amount obtained by the prediction formula on the tightness of the filament.

[0040] Figure 7 This is a photograph of an elastic spiral fiber of wound filament prepared by using a fixed winding device with a fixed moving speed, under different torsion amounts and when the helical chirality of the fiber and filament is opposite, in one embodiment of this application, to verify the effect of the torsion amount obtained by the prediction formula on the tightness of the filament.

[0041] Figure 8 This is a photograph of the structural deformation of an elastic helical fiber wrapped around a filament during swelling, when the fiber and the filament have the same or opposite helical chirality, according to one embodiment of this application.

[0042] Figure 9 The stress-strain curve and resistance-strain curve of an elastic helical fiber wound with conductive filaments according to an embodiment of this application are shown, wherein the fiber and the helical filament have the same chirality.

[0043] Figure 10 The diagram illustrates the electrothermal effect of an elastic spiral fiber wound with conductive filaments according to an embodiment of this application under different voltages, wherein the fiber and the spiral filaments have the same chirality.

[0044] Figure 11 This is a photograph of the structural deformation of a thermally expanding microsphere composite elastic helical fiber wound with conductive filaments according to an embodiment of this application when heated and expanded, wherein the fiber and the filament helix have opposite chirality. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0047] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The singular forms "a," "the," and "the" used in this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. The word "if" as used herein can be interpreted as "when," "when," or "in response to determination."

[0048] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0049] Please see Figure 1 This is a flowchart of a method for preparing an elastic helical fiber from wound filaments according to the first embodiment of this application. The method includes:

[0050] S1: Straighten and twist the elastic helical fiber according to the preset tensile strain multiple and torsion amount;

[0051] S2: Fix both ends of the straightened and twisted elastic helical fiber to a filament winding device; the filament winding device includes a winding device for releasing filaments while rotating around the elastic helical fiber, and a moving device for translating the winding device;

[0052] S3: Based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, tensile strain multiple, torsion amount, filament diameter, and winding rotation speed of the winding equipment, a prediction formula is constructed between the moving speed of the winding equipment and the tightness of the filament.

[0053] S4: Based on the prediction formula, obtain the target moving speed of the winding device corresponding to the tightness of the target filament;

[0054] S5: Based on the winding rotation speed and the target moving speed, start the winding device and the moving device of the filament winding device, so that the winding device rotates around the elastic spiral fiber according to the winding rotation speed, and the moving device drives the winding device to translate according to the target moving speed, so as to wind the filament around the elastic spiral fiber to obtain the target elastic spiral fiber with the filament wound around it; wherein, the actual filament tightness in the relaxed state of the target elastic spiral fiber corresponds to the target filament tightness.

[0055] The relaxed state refers to the natural relaxed state of the target elastic spiral fiber after it has been detached from the filament winding device, such as the natural relaxed state after the target elastic spiral fiber has been manually removed, or the natural relaxed state after the fixing clamp on the filament winding device has been loosened to allow the target elastic spiral fiber to detach naturally from the filament winding device.

[0056] In a feasible embodiment, the helical chiral relationship is obtained through the following steps:

[0057] When it is necessary to increase the diameter, decrease the pitch, reduce the total number of turns, and decrease the total length of the target elastic helical fiber wound with filaments, a filament winding direction with the same helical chirality as the elastic helical fiber is adopted to obtain a helical chirality relationship where the fiber and the filament have the same helical chirality.

[0058] When it is necessary to reduce the diameter, increase the pitch, increase the total number of turns, and increase the total length of the target elastic helical fiber wound with filaments, a filament winding direction opposite to the helical chirality of the elastic helical fiber is adopted to obtain a helical chirality relationship between the fiber and the filament with opposite helical chirality.

[0059] In a feasible embodiment, step S3: constructing a prediction formula between the winding device's moving speed and the filament tightness based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, the tensile strain multiple, the torsion amount, the filament diameter, and the winding rotation speed of the winding device, including:

[0060] S31: Obtain the length of each spiral turn of the elastic helical fiber in its initial state based on the fiber diameter and the fiber pitch;

[0061] The length of each spiral turn of the helical fiber in its initial state is obtained using the following formula:

[0062]

[0063] in, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch is... The fiber diameter is [value].

[0064] S32: Based on the fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, tensile strain multiple, torsion amount, filament diameter, winding rotation speed of the winding device, and helical length per turn, construct a predictive formula for the relationship between the moving speed of the winding device and the tightness of the filament.

[0065] In a feasible embodiment, if the elastic helical fiber and the filament have the same helical chirality, the prediction formula is:

[0066]

[0067] in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This refers to the amount of torsion in the elastic helical fiber. It should be noted that the amount of torsion T is defined as the number of turns per spiral of the elastic helical fiber in the direction of rotation. For example, when T is 0, it means the elastic helical fiber is locked in a torsion state during straightening; when T is 1, the amount of torsion per spiral of the elastic helical fiber increases by 1, meaning the elastic helical fiber over-rotates until the number of spiral turns doubles; when T is -1, the amount of torsion per spiral of the elastic helical fiber decreases by 1, meaning the elastic helical fiber unwinds to a state without torsion.

[0068] Please see Figure 2 In this embodiment, silicone rubber elastic spiral fibers and fine copper wires are used, and the fiber diameter of the elastic spiral fibers is... The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The tensile strain multiple of the elastic helical fiber is 0.1 mm. The winding rotation speed of the winding equipment is 10 times that of the winding equipment. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. The moving speed of the winding equipment is 0. The variable is denoted as . When the tightness of the filament is greater than or equal to 0, and the helical chirality of the elastic helical fiber and the filament is the same during the winding process, the elastic helical fiber wound by the filament will exhibit a decrease in pitch, an increase in diameter, a decrease in the total number of turns, and a decrease in total length. Moreover, this effect intensifies as the tightness of the filament increases. In addition to the above phenomena, an increase in the tightness of the filament will also cause the elastic helical fiber to become thinner and longer, further reducing the pitch and increasing the helical length per turn. These effects enhance the helical structure flexibility of the elastic helical fiber wound with the filament when the chirality of the fiber and the filament is the same, making it highly valuable in applications requiring high elongation at break of the elastic helical fiber.

[0069] In this application, the prediction formula ignores the depth of the indentation left by the filaments on the elastic helical fiber during winding and treats the elastic helical fiber as an incompressible material to simplify the formula, but this has little impact on the prediction results.

[0070] In a feasible embodiment, if the elastic helical fiber and the filament have opposite helical chirality, the prediction formula is:

[0071]

[0072] in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, The twist amount of the elastic helical fiber is the number of twists in the direction of rotation per spiral turn of the elastic helical fiber.

[0073] Please see Figure 2 In this embodiment, silicone rubber elastic spiral fibers and fine copper wires are used, and the fiber diameter of the elastic spiral fibers is... The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The tensile strain multiple of the elastic helical fiber is 0.1 mm. The winding rotation speed of the winding equipment is 10 times that of the winding equipment. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. The moving speed of the winding equipment is 0. The variable is denoted as . When the tightness of the filament is greater than or equal to 0, and the helical chirality of the elastic helical fiber is opposite to that of the filament during the winding process, the elastic helical fiber wound by the filament will exhibit an increase in pitch, a decrease in diameter, an increase in the total number of turns, and an increase in total length. This effect intensifies as the tightness of the filament increases. Furthermore, a higher tightness of the filament also leads to thinner and longer elastic helical fibers after winding with the filament, further increasing the total length of the elastic fibers wound with the filament.

[0074] In a feasible embodiment, S1: the step of straightening and twisting the elastic helical fiber according to a preset tensile strain multiple and torsion amount includes:

[0075] S11: Based on the tightness of the target filament and the pitch of the target filament, obtain the tensile strain multiple and the torsion amount; wherein, the pitch of the target filament is the pitch of the filament wound around the target elastic helical fiber when the target elastic helical fiber is in a relaxed state;

[0076] S12: The elastic helical fiber is straightened and twisted according to the tensile strain multiple and the amount of torsion.

[0077] The tensile strain ratio and the amount of torsion both cause changes in the target filament pitch of the wound filaments in the relaxed state of the target elastic helical fiber obtained in step S5. For example, by adjusting the amount of torsion T of the elastic helical fiber, the dependence between the filament pitch and the tightness of the filaments in the relaxed state can be eliminated. Therefore, when a higher filament pitch is needed to save filament usage while achieving the target filament tightness, the amount of torsion T can be reduced when the chirality of the fiber and the filament are the same, and increased when the chirality of the fiber and the filament is opposite. When a smaller filament pitch is needed to prevent the aforementioned phenomenon of filament breakage or premature breakage of the elastic helical fiber under tension, the amount of torsion T can be increased when the chirality of the fiber and the filament are the same, and decreased when the chirality of the fiber and the filament is opposite, ensuring that the elastic helical fiber wound with filaments has a high elongation at break. Moreover, filaments with smaller pitch can exert a stronger elongation and thinning effect on the fiber, enabling the elastic helical fiber with the same chirality of fiber and filament to achieve a larger helical diameter and smaller pitch, thus possessing a better breaking elongation.

[0078] This involves conducting experiments for different target filament tightness levels. Based on the tensile strain ratio, torsion, and the obtained target filament pitch used in the experiment, the influence relationship between the target filament pitch and the tensile strain ratio and torsion can be established. Simultaneously, the change in the relationship curve between filament tightness and winding equipment translation when the tensile strain ratio or torsion changes can be predicted using a filament tightness prediction formula. Please refer to [link to relevant documentation]. Figures 3-7 .

[0079] In one feasible embodiment, silicone rubber elastic helical fibers and fine copper wires are used, wherein the fiber diameter of the elastic helical fibers is... The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The winding rotation speed of the winding equipment is 0.1 mm. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. The moving speed of the winding equipment is 0. The tensile strain ratio of the elastic helical fiber was obtained using the formula for predicting the tightness of the fine filaments, with filament tightness as the variable. The curve showing the relationship between the filament tightness at tensile strain ratios of 6-14 times and the winding equipment speed can be used to predict the influence of tensile strain ratios on filament tightness. Figure 3 As shown. Experiments were conducted using the winding equipment moving speed at which the filament tightness was 0 when the tensile strain multiple was 6, 8, 10, 12, or 14. It was observed that the filaments adhered to the surface of the elastic helical fiber, with no obvious filament lifting or tightness. Figure 4 As shown.

[0080] In one feasible embodiment, silicone rubber elastic helical fibers and fine copper wires are used, wherein the fiber diameter of the elastic helical fibers is... The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The winding rotation speed of the winding equipment is 0.1 mm. The tensile strain ratio of the elastic helical fiber is 10 revolutions per minute. The moving speed of the winding equipment is 10 times that of the winding equipment. The torsion of the elastic helical fiber was obtained using a formula for predicting the tightness of the filaments. The curves showing the relationship between the filament tightness (0, 1, or -1) and the winding equipment speed can be used to predict the influence of the twist of the elastic helical fiber on the filament tightness. Figure 5 As shown. The twist amount of the elastic helical fiber was set to 0, 1, or -1, and experiments were conducted using different winding equipment moving speeds to verify this. Figures 6-7 As shown in the diagram, it can be observed that when the chirality of the elastic helical fiber and the filament is the same, a twist of 1 reduces the filament tightness, requiring a smaller winding equipment speed to achieve a filament tightness ≥ 0; a twist of -1 increases the filament tightness, requiring a larger winding equipment speed to achieve a filament tightness ≥ 0. When the chirality of the elastic helical fiber and the filament is opposite, a twist of 1 increases the filament tightness, requiring a larger winding equipment speed to achieve a filament tightness ≥ 0; a twist of -1 increases the filament tightness, requiring a smaller winding equipment speed to achieve a filament tightness ≥ 0. These experimental results are consistent with... Figure 5 The predicted relationship between the amount of twist of the elastic helical fiber and the tightness of the filament is consistent.

[0081] When adjusting the tensile strain ratio or torsion, the target wire pitch can be predicted using the following formula:

[0082] If the elastic helical fiber and the filament have the same helical chirality, the prediction formula is:

[0083]

[0084] If the elastic helical fiber and the filament have opposite helical chirality, the prediction formula is:

[0085]

[0086] in, The pitch of the elastic helical fiber after being wound into fine filaments is in the relaxed state. This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This represents the amount of twist in the elastic helical fiber. Among them, The definition is the number of turns added per spiral of an elastic helical fiber.

[0087] The influence relationship between the constructed target filament pitch and the tensile strain ratio and torsion amount, as well as the target filament pitch prediction results that can be obtained when adjusting the tensile strain ratio or torsion amount, can be applied to step S11 to obtain the tensile strain ratio and torsion amount.

[0088] In one feasible embodiment, after obtaining the target elastic helical fiber wound with filaments, the method further includes:

[0089] The target elastic helical fiber wrapped with filaments is expanded by swelling or thermal expansion to increase the actual filament tightness of the target elastic helical fiber wrapped with filaments.

[0090] In one feasible embodiment, after obtaining the target elastic helical fiber wound with filaments, the method further includes:

[0091] The target elastic spiral fiber wrapped with filaments is shrunken by drying or cold shrinking to reduce the actual filament tightness of the target elastic spiral fiber wrapped with filaments.

[0092] Elastic helical fibers composed of hydrogels swell upon contact with water and shrink upon removal from the solvent environment; elastic helical fibers composed of silicone rubber swell upon contact with non-polar solvents (such as n-hexane, dichloromethane, etc.) and shrink upon removal from the solvent environment. The solvent-mediated swelling and shrinkage capabilities described herein are not limited to the two examples mentioned above.

[0093] When the target elastic helical fiber wrapped with filaments expands or contracts, its fiber diameter, helix diameter, and pitch change, and the tightness of the filaments on the elastic helical fiber also changes.

[0094] For example, please see Figure 8 It uses silicone rubber elastic spiral fibers and fine copper wires, with the elastic spiral fibers having a diameter of [missing information]. The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. It is 10 mm. When the fiber and filament have the same chirality, the filament diameter is... The winding rotation speed of the winding equipment is 0.16 mm. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. The moving speed of the winding equipment is 1. The speed is 20 mm / min. When the fiber and filament have opposite chirality, the filament diameter... The winding rotation speed of the winding equipment is 0.05mm. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. -2 represents the moving speed of the winding equipment. The speed is 12 mm / min.

[0095] When an elastic helical fiber expands, the tightness of the filaments increases. For elastic helical fibers with the same chirality between the fiber and the filament, this results in an increase in helical diameter, a decrease in pitch, a decrease in the total number of turns, and a decrease in total length. Figure 8 As shown on the left side of the image. Therefore, when selecting elastic helical fibers, one can choose elastic helical fibers with a pitch of 2 to 4 times the fiber diameter; or, when winding the filaments, choose filaments with stronger mechanical properties or thicker filaments, such as metal wires. Because the winding process is carried out in a straightened state of the elastic helical fiber, the filaments will have a certain straightening effect after relaxation, preventing the pitch of the elastic helical fiber from returning to its initial value, thereby increasing the pitch of the elastic helical fiber wound with the filaments, and thus increasing the magnitude of the increase in helical diameter, decrease in pitch, decrease in total number of turns, and decrease in total length when the elastic helical fiber expands. However, for elastic helical fibers wound with filaments where the chirality between the fiber and the filament is opposite, the expansion of the elastic helical fiber will lead to a decrease in helical diameter, increase in pitch, increase in total number of turns, and increase in total length, such as... Figure 8 As shown on the right side of the middle section.

[0096] When elastic helical fibers contract, the phenomena occurring in elastic helical fibers with the filaments wound around them, where the chirality between the fibers and filaments is the same or opposite, are completely opposite to those described above. Specifically, when the chirality between the fibers and filaments is the same, as the elastic helical fibers contract and the tightness of the filaments decreases, the fiber's helical diameter decreases, the pitch increases, the total number of turns increases, and the total length increases. When the chirality between the fibers and filaments is opposite, as the elastic helical fibers contract and the tightness of the filaments decreases, the fiber's helical diameter increases, the pitch decreases, the total number of turns decreases, and the total length decreases.

[0097] In one feasible embodiment, the filament is a conductive filament, including but not limited to conductive metal wires such as copper, silver, nickel, and gold wires, polymer filaments covered with a conductive layer, and carbon fibers. Preferably, non-conductive elastic helical fibers are selected to avoid mutual interference between the conductive paths of the two; elastic helical fibers with a heat resistance temperature higher than the temperature caused by Joule heating when the filament is energized are selected to maintain the thermal stability of the elastic helical fibers around which the conductive filament is wound.

[0098] When conductive filaments are wound around elastic helical fibers, the effect on the structure of the elastic helical fibers is the same as that on non-conductive filaments. After the helical structure of the elastic helical fiber is fully extended, continued tension will cause the elastic helical fiber to elastically elongate, while the conductive filaments will extend their helical structure. Therefore, based on the structure of the elastic helical fiber with conductive filaments wound around it, it is possible to maintain stable conductivity within an elastic tensile range of tens of times strain.

[0099] Please see 9- Figure 11 , Figure 9 The stress-strain curve and resistance-strain curve of an elastic helical fiber wound with conductive filaments according to one embodiment of this application are shown. Figure 10 The diagram shows the electrothermal effect of an elastic spiral fiber wound with conductive filaments according to an embodiment of this application under different voltages. Figures 9-10 The process utilizes silicone rubber elastic spiral fibers and fine copper wires. The fibers and fine wires have the same helical chirality, and the fiber diameter of the elastic spiral fibers is... The pitch of the elastic helical fiber is 1.3 mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The winding rotation speed of the winding equipment is 0.1 mm. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. The moving speed of the winding equipment is 0. The speed is 15 mm / min.

[0100] Figure 11 This is a photograph of the structural deformation of a composite elastic helical fiber with conductive filaments wound around thermally expandable microspheres, according to one embodiment of this application, during electrical heating and expansion. The fiber is a silicone rubber elastic helical fiber with 10 wt% thermally expandable microspheres added. The filaments are fine copper wires, and the fiber's helical chirality is opposite to that of the filaments. The fiber diameter of the elastic helical fiber is... The pitch of the elastic helical fiber is 1.3mm. The spiral diameter of the elastic helical fiber is 1.8 mm. The length of each spiral turn of the elastic helical fiber in its initial state is 3.1 mm. The diameter of the filament is 10 mm. The winding rotation speed of the winding equipment is 0.05 mm. The twist rate is 10 revolutions per minute, which is the amount of twist of the elastic helical fiber. -2 represents the moving speed of the winding equipment. The speed is 12 mm / min.

[0101] Among them, the elastic helical fiber wound with conductive filaments can be used in the following applications:

[0102] 1. The elastic spiral fiber, with conductive filaments having an elongation at break of more than 30 times, allows the electrical appliance to move freely within a 3-meter space with an initial length of 10cm.

[0103] 2. The elastic helical fiber, wound with conductive filaments, can autonomously wind itself onto rod-shaped or tubular objects to electrically heat the liquid within them. The diameter of the elastic helical fiber can be adjusted as needed, thus adapting to rod-shaped or tubular objects of a certain diameter range. The elastic helical fiber, wound with conductive filaments, can adjust its pitch according to tensile strain, thereby flexibly controlling the length of the heating zone and heat dissipation efficiency.

[0104] 3. When using elastic spiral fibers composited with thermally expandable microspheres, the conductive filaments will expand when heated by electricity, and then deform under the tightening action of the filaments. It can be used as a disposable deformable material mediated by electrothermal effect.

[0105] Compared to related technologies, the method for preparing elastic helical fibers by winding filaments in this application involves straightening and twisting the elastic helical fibers according to a preset tensile strain multiple and torsion amount. The straightened and twisted ends of the elastic helical fibers are then fixed to a filament winding device. Furthermore, a predictive formula is constructed based on the fiber diameter, fiber pitch, fiber diameter, the helical chirality relationship between the fiber and the filament, the tensile strain multiple, the torsion amount, the filament diameter, and the winding rotation speed of the winding device, to predict the relationship between the moving speed of the winding device and the tightness of the filament. This predictive formula is used to obtain the target moving speed corresponding to the target tightness of the filament, and then... Based on the winding rotation speed and the target moving speed, the winding device and the moving device of the filament winding device are started, so that the winding device rotates around the elastic spiral fiber according to the winding rotation speed, and the moving device drives the winding device to translate according to the target moving speed, so as to wind the filament around the elastic spiral fiber, thereby obtaining the target elastic spiral fiber with the filament wound around it. The target elastic spiral fiber with the filament wound around it is obtained with the actual filament tightness in the relaxed state corresponding to the target filament tightness. Thus, the target elastic spiral fiber with the actual filament tightness in the relaxed state corresponding to the target filament tightness is efficiently and accurately prepared.

[0106] It should be noted that in this technical solution, the structural influence exerted by the filament on the elastic helical fiber depends on the filament tightening around the elastic helical fiber and creating indentations. The structural control effect is generated under the combined action of the filament's tightening pressure and the elastic fiber's rebound force. Therefore, it is necessary to select an elastic helical fiber. Under this requirement, the components of the elastic helical fiber include, but are not limited to, various types of silicone rubber, polyurethane, hydrogels, organic gels, liquid crystal elastomers, deep eutectic gels, and other elastic materials. Ideally, the intrinsic elastic modulus of the elastic helical fiber components is between 0.5 and 50 MPa. The higher the elastic modulus, the lower the structural deformability of the elastic helical fiber, and the less affected it is by the filament, which is beneficial for the stable winding of the filament, but it weakens the filament's ability to control the structure of the elastic helical fiber. When the elastic modulus is below 0.5 MPa, the elastic helical fiber is difficult to maintain its helical structure and is prone to bending or twisting during the winding process. Above 50 MPa, it is difficult to create indentations under the action of the filament. The intrinsic elongation at break of the elastic helical fiber component is greater than 1. A higher intrinsic elongation at break is more conducive to expanding the range of control over the tightness of the filaments by the straightening strain rate. Under the two basic requirements of elastic modulus and intrinsic elongation at break, the higher the intrinsic breaking strength and intrinsic toughness of the elastic helical fiber, the better, as this helps to prevent the elastic helical fiber from breaking during the straightening and winding of the filaments.

[0107] The fiber diameter of elastic helical fibers is 0.3 to 10 mm. This is because the filaments used for winding need to be much thinner than the elastic helical fibers. Therefore, when the fiber diameter of elastic helical fibers is less than 0.3 mm, the filament diameter will be too thin, making it difficult to perform the winding operation. Moreover, when the elastic helical fibers are too thin, they are more prone to deformation when disturbed by external forces. Therefore, they are easily affected by friction and winding tension disturbances during the winding process, making it difficult to obtain a stable and controllable filament winding result. Therefore, it is necessary to select elastic helical fibers with a fiber diameter greater than or equal to 0.3 mm.

[0108] The fiber diameter and pitch of elastic helical fibers are two key structural parameters of their helical structure. The fiber diameter is 1.5 to 5 times the fiber diameter. Too low a fiber diameter results in a large difference in curvature between the inner and outer sides of the helix, leading to stress concentration on the inner side during tensile deformation and making the elastic helical fiber prone to breakage. Therefore, the fiber diameter should not be less than 1.5 times the fiber diameter. Too high a fiber diameter results in a small difference in curvature between the inner and outer sides of the helix, reducing the elastic modulus during helical expansion and hindering the maintenance of the helical structure. Therefore, the fiber diameter should not exceed 5 times the fiber diameter. The fiber pitch is 1 to 3 times the fiber diameter. Geometrically, the minimum fiber pitch equals the fiber diameter, where adjacent coils are close together, and the helix's stretchability is highest. Therefore, the lower limit of the pitch for elastic helical fibers should be 1 times the fiber diameter. Too high a fiber pitch reduces the helix's stretchability and affects its tensile properties. Therefore, the fiber pitch should not exceed 4 times the fiber diameter.

[0109] The filament winding device can be an apparatus that supports the following schemes:

[0110] Option 1: Place two motors rotating in opposite directions opposite to each other, with synchronized rotation speeds. Install clamps on the motor shafts; a drill chuck is ideal, as it can fix the elastic helical fiber coaxially to the motor shaft. Fix both ends of the straightened elastic helical fiber to the motor shaft using the clamps. Secure the starting end of the filament near one end of the elastic helical fiber by binding or clamping. Fix the remaining filaments to a device (moving equipment) that can move linearly parallel to the elastic helical fiber, applying a fixed winding tension. Turn on the rotation function of both motors (winding equipment); the straightened elastic helical fiber will rotate around its axis at a speed of [missing information]. (Revolves / minute). Simultaneously, the linear motion device is activated, causing the remaining filaments to move uniformly towards the other end of the elastic helical fiber at a speed of [speed value missing]. (Length / minute), the fine filaments can be spirally wound onto the elastic spiral fiber.

[0111] Option 2: A hollow rotating device is fixed to a device capable of linearly moving perpendicular to the rotating ring surface. The straightened elastic helical fiber is passed through the central hole of the hollow rotating device, with the fiber perpendicular to the rotating ring surface (winding equipment) and positioned at the center of the ring. Both ends of the fiber are fixed to a stationary object. The rotating ring surface of the hollow rotating device is positioned near one end of the elastic helical fiber, and the starting end of the filament is fixed to this position by binding or clamping. The remaining filaments are fixed to the rotating ring of the hollow rotating device and pulled with a fixed winding tension. The rotation function of the hollow rotating device is activated, and the rotation speed is [missing information]. (revolves / minute), and driven by a linear motion device (mobile device), the rotating ring moves uniformly towards the other end of the elastic helical fiber at a speed of [speed value missing]. (Length / minute), the fine filaments can be spirally wound onto the elastic spiral fiber.

[0112] The second embodiment of this application provides an elastic spiral fiber with wound filaments, which is prepared by the preparation method described above.

[0113] The device embodiments described above are merely illustrative. The components described as separate parts may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without any inventive effort.

[0114] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function selected in one or more boxes.

[0116] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function selected in one or more boxes.

[0117] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0118] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0119] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0120] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0121] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for preparing an elastic helical fiber with wound filaments, characterized in that, include: The elastic helical fiber is straightened and twisted according to the preset tensile strain ratio and torsion amount; The two ends of the straightened and twisted elastic helical fiber are fixed to a filament winding device; the filament winding device includes a winding device for releasing filaments while rotating around the elastic helical fiber, and a moving device for translating the winding device; Based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, the tensile strain multiple, the torsion amount, the filament diameter, and the winding rotation speed of the winding device, a predictive formula is constructed between the moving speed of the winding device and the tightness of the filament. Based on the prediction formula, the target moving speed of the winding device corresponding to the tightness of the target filament is obtained; Based on the winding rotation speed and the target moving speed, the winding device and the moving device of the filament winding device are started, so that the winding device rotates around the elastic spiral fiber according to the winding rotation speed, and the moving device drives the winding device to translate according to the target moving speed, so as to wind the filament around the elastic spiral fiber to obtain the target elastic spiral fiber with the filament wound around it; wherein, the actual filament tightness in the relaxed state of the target elastic spiral fiber corresponds to the target filament tightness.

2. The method for preparing elastic spiral fibers with wound filaments according to claim 1, characterized in that, The formula for predicting the relationship between the winding equipment's moving speed and the filament tightness, based on the fiber diameter, fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, tensile strain ratio, torsion amount, filament diameter, and winding rotation speed of the winding equipment, includes: Based on the fiber diameter and the fiber pitch, the length of each spiral turn of the elastic helical fiber in its initial state is obtained; Based on the fiber pitch, fiber diameter, helical chirality relationship between the fiber and filament, tensile strain multiple, torsion amount, filament diameter, winding rotation speed of the winding device, and helical length per turn, a predictive formula is constructed for the relationship between the moving speed of the winding device and the tightness of the filament.

3. The method for preparing elastic spiral fibers with wound filaments according to claim 2, characterized in that, If the elastic helical fiber and the filament have the same helical chirality, the prediction formula is: ； in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This represents the amount of twist of the elastic helical fiber.

4. The method for preparing elastic spiral fibers with wound filaments according to claim 2, characterized in that, If the elastic helical fiber and the filament have opposite helical chirality, the degree of tightness can be predicted using the following formula: ;in, This refers to the tightness of the elastic spiral fiber after it has been wound with fine filaments, in its relaxed state. The diameter of the elastic helical fiber in its initial state. The diameter of the filament, This represents the length of each spiral turn of the elastic helical fiber in its initial state. The fiber pitch refers to the pitch of the elastic helical fiber in its initial state. This represents the tensile strain multiple of the elastic helical fiber. The winding rotation speed of the winding equipment. The moving speed of the winding equipment, This represents the amount of twist of the elastic helical fiber.

5. The method for preparing elastic spiral fibers with wound filaments according to claim 1, characterized in that, The helical chirality relationship is obtained through the following steps: When it is necessary to increase the diameter, decrease the pitch, reduce the total number of turns, and decrease the total length of the target elastic helical fiber wound with filaments, a filament winding direction with the same helical chirality as the elastic helical fiber is adopted to obtain a helical chirality relationship where the fiber and the filament have the same helical chirality. When it is necessary to reduce the diameter, increase the pitch, increase the total number of turns, and increase the total length of the target elastic helical fiber wound with filaments, a filament winding direction opposite to the helical chirality of the elastic helical fiber is adopted to obtain a helical chirality relationship between the fiber and the filament with opposite helical chirality.

6. The method for preparing elastic helical fibers with wound filaments according to claim 1, characterized in that, After obtaining the target elastic helical fiber wound with fine filaments, the process also includes: The target elastic helical fiber wrapped with filaments is expanded by swelling or thermal expansion to dynamically increase the actual filament tightness of the target elastic helical fiber wrapped with filaments.

7. The method for preparing elastic spiral fibers with wound filaments according to claim 1, characterized in that, After obtaining the target elastic helical fiber wound with fine filaments, the process also includes: By drying or cold shrinking the target elastic helical fiber wrapped with filaments, the actual filament tightness of the target elastic helical fiber wrapped with filaments is dynamically reduced.

8. The method for preparing elastic helical fibers with wound filaments according to claim 1, characterized in that, The steps of straightening and twisting the elastic helical fiber according to the preset tensile strain ratio and torsion amount include: The tensile strain multiple and torsion amount are obtained based on the tightness of the target filament and the pitch of the target filament; wherein, the pitch of the target filament is the pitch of the filament wound around the target elastic helical fiber when the target elastic helical fiber is in a relaxed state.

9. The method for preparing elastic helical fibers with wound filaments according to any one of claims 1-8, characterized in that, The filament is a conductive filament.

10. An elastic helical fiber wound with fine filaments, characterized in that: The elastic helical fiber with wound filaments is prepared by the preparation method according to any one of claims 1-9.

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