Two-component elastic activation device

Abstract

The utility model discloses a two-component elastic activation device belongs to the field of elastic activation technology. A two-component elastic activation device, including fuselage, guide wheel group, transverse activation wheel group, longitudinal activation wheel group and cooling guide wheel group, fuselage fixed mounting is in ground, guide wheel group installs on the fuselage, is used for guiding the movement and flattening of non -woven cloth, transverse activation wheel group installs in the fuselage and is located the sequence after guide wheel group, and transverse activation wheel group is connected with the sliding of fuselage, and its inside is equipped with heating channel to realize the transverse elastic activation of non -woven cloth, longitudinal activation wheel group installs in the fuselage and is located the sequence after transverse activation wheel group, and longitudinal activation wheel group is connected with the sliding of fuselage, and its inside is equipped with heating channel to realize the longitudinal elastic activation of non -woven cloth, cooling guide wheel group installs on the fuselage, and is located the sequence after longitudinal activation wheel group. It can realize the transverse and longitudinal elastic activation of non -woven cloth.

Description

Technical Field

[0001] This utility model belongs to the field of elastic activation technology, and more specifically, relates to a two-component elastic activation device. Background Technology

[0002] Nonwoven fabrics, as soft, breathable, and lightweight nonwoven materials, are widely used in medical protective equipment, personal care, construction engineering, and apparel and textiles. With increasing market demand for comfort and functionality, the requirements for nonwoven fabrics in terms of high elasticity, breathability, fluffiness, privacy, and a rib-free feel are becoming increasingly stringent. Especially in products such as baby care and adult hygiene products, where softness and a close fit are crucial, the application of elastic nonwoven fabrics is gradually becoming a development trend.

[0003] Existing high-elasticity nonwoven fabrics require elastic activation of the elastic fibers within the fabric during production. However, existing fabrics (such as the elastic nonwoven fabric disclosed in Chinese patent CN219007287U) cannot achieve bidirectional activation, resulting in significant limitations. Furthermore, newer fabrics (such as the high-elasticity nonwoven fabric in our company's patent CN202411312920.7) require separate longitudinal and transverse activation devices to achieve bidirectional stretching, leading to excessively high costs. Utility Model Content

[0004] This invention provides a two-component elastic activation device that can achieve elastic activation of nonwoven fabrics in both the transverse and longitudinal directions.

[0005] This utility model discloses a two-component elastic activation device, which includes a body, a guide wheel assembly, a transverse activation wheel assembly, a longitudinal activation wheel assembly, and a cooling guide wheel assembly.

[0006] The fuselage is fixedly installed on the ground;

[0007] The guide wheel assembly is mounted on the machine body and is used to guide the movement and flattening of the nonwoven fabric;

[0008] The transverse activation wheel assembly is installed inside the machine body and is located after the guide wheel assembly. The transverse activation wheel assembly is slidably connected to the machine body, and has a heating channel inside to achieve transverse elastic activation of the nonwoven fabric.

[0009] The longitudinal activation wheel assembly is installed inside the machine body and is located after the transverse activation wheel assembly. The longitudinal activation wheel assembly is slidably connected to the machine body and has a heating channel inside to achieve longitudinal elastic activation of the nonwoven fabric.

[0010] The cooling guide wheel assembly is mounted on the machine body and located after the longitudinal activation wheel assembly. It is used to cool and shape the activated nonwoven fabric.

[0011] As a further improvement of this utility model, the guide wheel assembly includes an upper guide wheel and a side guide main wheel. The upper guide wheel is fixed to the upper part of the machine body, and the side guide main wheel is located on the side edge of the machine body and below the upper guide wheel. A side guide auxiliary wheel is also provided next to the side guide main wheel. Nonwoven fabric can be selectively wound around the side guide auxiliary wheel to adjust the tension of the nonwoven fabric.

[0012] As a further improvement of this utility model, the transverse activation wheel set includes two intermeshing transverse activation wheels and expansion and flattening rollers respectively disposed on the outer periphery of the corresponding transverse activation wheels. The outer periphery of the transverse activation wheels is provided with transversely arranged concave and convex grooves. The depth of the groove engagement is determined by the transverse elasticity ratio of the activated product through the intermeshing of the concave and convex grooves. The transverse activation wheels are slidably connected to the first slide rail through the first mounting base and the displacement is controlled by the first sliding drive component. One end of the transverse activation wheel is provided with a transverse heating connection port for introducing a heating medium. The non-woven fabric passes through the expansion and flattening roller and the corresponding transverse activation wheel to be flattened and guided into the space between the transverse activation wheels.

[0013] As a further improvement of this utility model, the outer side of the expansion and flattening roller is provided with a groove that matches and meshes with the transverse activation wheel, so as to perform transverse activation while flattening.

[0014] As a further improvement of this utility model, the longitudinal activation wheel assembly includes two meshing longitudinal activation wheels, each with longitudinally arranged concave and convex teeth on its outer periphery. The meshing depth of the teeth is determined by the longitudinal elasticity ratio of the activated product. The longitudinal activation wheel is slidably connected to the third slide rail via a third mounting base and its displacement is controlled by a third sliding drive component. One end of the longitudinal activation wheel is provided with a longitudinal heating connection port for introducing a heating medium.

[0015] As a further improvement of this utility model, the cooling guide wheel assembly includes a cooling wheel and a cooling connection port. The cooling wheel is provided with a cooling pipe, and the cooling connection port is connected to an external cooling medium to achieve cooling.

[0016] As a further improvement of this utility model, it also includes a clamping device disposed between the transverse activation wheel set and the longitudinal activation wheel set, for positioning and clamping the edge of the fabric.

[0017] As a further improvement of this utility model, the nonwoven fabric used in the activation device includes a first skin-friendly layer and a second skin-friendly layer, with an elastic layer composed of several wavy elastic fibers between the first skin-friendly layer and the second skin-friendly layer; the first skin-friendly layer, the elastic layer and the second skin-friendly layer are composited and fused into an integral structure on a line; the elastic layer is an integral fiber mesh structure, and the crests of the longitudinally placed elastic fibers are fixedly connected to the troughs of the transversely placed elastic fibers.

[0018] As a further improvement of this utility model, the fiber structure of the wavy elastic fiber is a core-sheath structure; the core-sheath structure includes an inner core and an outer sheath, the outer sheath completely covers the outer end of the inner core, and the ratio of the radius of the inner core to the thickness of the outer sheath is 1:1~9.

[0019] As a further improvement of this utility model, the fiber structure of the wavy elastic fiber is a parallel structure; the parallel structure includes a first parallel component and a second parallel component, the first parallel component and the second parallel component are combined in parallel, and the volume ratio of the first parallel component and the second parallel component is 1~9:9~1.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] By setting up a collaborative structure of transverse and longitudinal activation wheels, the limitation of existing technologies that can only activate in one direction is overcome. The transverse activation wheels achieve transverse elastic activation of the nonwoven fabric through heating channels and transversely arranged grooves; the longitudinal activation wheels achieve longitudinal elastic activation of the nonwoven fabric through heating channels and longitudinally arranged teeth; the cooling guide wheels cool and shape the fabric after bidirectional activation through cooling pipes, ensuring stable elastic performance. Therefore, this invention achieves simultaneous improvement in both transverse and longitudinal elasticity of the nonwoven fabric, significantly improving the fit and comfort of the product. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0024] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 This is a side view of the structure and a schematic diagram of the nonwoven fabric processing flow of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the present invention with the outer shell removed;

[0027] Figure 6 This utility model Figure 5 Enlarged structural diagram at point B;

[0028] Figure 7 This is a schematic diagram of the structure of the nonwoven fabric of this utility model;

[0029] Figure 8 This is a schematic diagram of the fiber structure of the nonwoven wavy elastic fiber of this utility model.

[0030] Explanation of the labels in the diagram:

[0031] Machine body 1, frame 11, basket frame 111, drive compartment 12, mounting frame 121, first drive 122, second drive 123, guide wheel assembly 2, upper guide wheel 21, side guide main wheel 22, side guide auxiliary wheel 221, transverse activation wheel assembly 3, transverse activation wheel 31, first mounting base 311, first slide rail 312, first sliding drive component 313, transverse heating connection port 314, expansion and flattening roller 32, second mounting base 321, second slide rail 322, second sliding drive component 323, longitudinal activation wheel assembly 4, longitudinal activation wheel 41, third mounting base 411, third slide rail 412, third sliding drive component 413, longitudinal heating connection port 414, cooling guide wheel assembly 5, cooling connection port 51. Detailed Implementation

[0032] Specific Implementation Example 1: Please refer to... Figures 1-6 A two-component elastic activation device comprises a body 1, a guide wheel assembly 2, a transverse activation wheel assembly 3, a longitudinal activation wheel assembly 4, and a cooling guide wheel assembly 5. The body 1 is mounted on the ground. The guide wheel assembly 2 is mounted on the upper and side ends of the body 1 and is fixedly connected to the body 1. The transverse activation wheel assembly 3 is installed inside the body 1 and is mounted below the guide wheel assembly 2, and is slidably connected to the body 1. The longitudinal activation wheel assembly 4 is installed inside the body 1 and is mounted below the transverse activation wheel assembly 3, and is slidably connected to the body 1. The cooling guide wheel assembly 5 is installed at the lower end of the body 1 and is fixedly connected to the body 1.

[0033] Specifically, the fuselage 1 includes a frame 11 and a drive bay 12. A basket frame 111 is provided on the side of the frame 11, and the basket frame 111 is detachably connected to the frame 11. The drive bay 12 is installed on the side away from the basket frame 111, and the drive bay 12 is detachably connected to the frame 11. A housing is fitted around the outer periphery of the drive bay 12, and a mounting bracket 121 is fixedly installed inside the housing. A first drive 122 and a second drive 123 are installed on the mounting bracket 121 from top to bottom. The output end of the first drive 122 is fixedly connected to the transverse activation wheel group 3 to control the start and stop of the transverse activation wheel group 3. The output end of the second drive 123 is fixedly connected to the longitudinal activation wheel group 4 to control the start and stop of the longitudinal activation wheel group 4.

[0034] Specifically, the guide wheel assembly 2 includes an upper guide wheel 21 and a side guide main wheel 22. The upper guide wheel 21 is fixedly connected to the upper end of the frame 11. The side guide main wheel 22 is installed on the side edge of the frame 11 and is installed at the lower end of the upper guide wheel 21, so that the nonwoven fabric passes through the upper guide wheel 21 first and then wraps around the side guide main wheel 22. A side guide auxiliary wheel 221 is also provided on the adjacent side of the side guide main wheel 22. The nonwoven fabric can be selectively wrapped around the side guide auxiliary wheel 221 between the upper guide wheel 21 and the side guide main wheel 22 to provide tension adjustment of the nonwoven fabric at different angles.

[0035] Specifically, the transverse activation wheel assembly 3 includes two intermeshing transverse activation wheels 31 and expansion and flattening rollers 32 respectively disposed on the outer periphery of the corresponding transverse activation wheels 31. The transverse activation wheels 31 are fixedly connected to both sides of the frame 11, and the expansion and flattening rollers 32 are installed on the upper end of the transverse activation wheels 31, so that there is a gap between the transverse activation wheels 31 and the expansion and flattening rollers 32 to guide the activation of the fabric and control the elasticity ratio. One end of the transverse activation wheel 31 is fixedly connected to the output end of the first drive 122, so that the rotation of the transverse activation wheel 31 is controlled by the first drive 122. The outer peripheral surface of the transverse activation wheel 31 is provided with transversely arranged grooves; the depth of the groove engagement determines the transverse elasticity ratio of the activated product.

[0036] Both sides of the transverse activation wheel 31 are provided with a first mounting base 311, and the lower end of the first mounting base 311 is also provided with a first slide rail 312, which is fixedly mounted on the frame 11. The first mounting base 311 and the first slide rail 312 are slidably connected. A first sliding drive member 313 is provided extending from the side end of the first mounting base 311. The output rod of the first sliding drive member 313 is fixedly connected to the first mounting base 311, so as to control the sliding of the first mounting base 311 on the first slide rail 312 through the first sliding drive member 313.

[0037] A heating channel is provided in the middle of the transverse activation wheel 31. A transverse heating connection port 314 is provided at the end of the transverse activation wheel 31 away from the first drive 122. The heating pipe is connected to one end of the transverse heating connection port 314. The other end of the transverse heating connection port 314 is connected to the external heating medium end, so that the heating medium can be introduced into the transverse activation wheel 31 through the transverse heating connection port 314 for heating.

[0038] Each of the spreading and flattening rollers 32 has a second mounting base 321 on its upper side. A second slide rail 322 is provided at the lower end of each mounting base 321, and the second slide rail 322 is fixedly mounted on the frame 11. The second mounting base 321 and the second slide rail 322 are slidably connected. A second sliding drive member 323 extends from the side end of the second mounting base 321. The output rod of the second sliding drive member 323 is fixedly connected to the second mounting base 321, so as to control the sliding of the second mounting base 321 on the second slide rail 322. Non-woven fabric passes between the spreading and flattening roller 32 and the corresponding transverse activation wheel 31 to be flattened and guided into the space between the transverse activation wheels 31. Preferably, the outer surface of the spreading and flattening roller 32 has grooves that mesh with the transverse activation wheels 31 to perform transverse activation while flattening.

[0039] Specifically, the longitudinal activation wheel assembly 4 includes two meshing longitudinal activation wheels (41), each with longitudinally arranged convex and concave teeth on its outer periphery. The depth of meshing of the convex and concave teeth determines the longitudinal elasticity ratio of the activated product. The longitudinal activation wheels 41 are fixedly connected to both sides of the frame 11. One end of the longitudinal activation wheel 41 is fixedly connected to the output end of the second drive 123, so that the rotation of the longitudinal activation wheel 41 can be controlled by the second drive 123. The longitudinal activation wheel 41 includes a third mounting base 411, a third slide rail 412, a third sliding drive component 413, and a longitudinal heating connection port 414. The third mounting base 411 is disposed on both sides of the longitudinal activation wheel 41, and the third slide rail 412 is disposed at the lower end of the third mounting base 411. The third slide rail 412 is fixedly connected to the frame 11, and the third mounting base 411 is slidably connected to the third slide rail 412. The third sliding drive member 413 is disposed on the side end of the third mounting base 411, and the output rod of the third sliding drive member 413 extends and is fixedly connected to the third mounting base 411, so as to control the sliding of the third mounting base 411 on the third slide rail 412 through the third sliding drive member 413. The longitudinal heating connection port 414 is installed on the other side away from the second drive 123, and a corresponding heating channel is provided in the middle of the longitudinal activation wheel 41. One end of the longitudinal heating connection port 414 is connected to the heating channel. The other end of the longitudinal heating connection port 414 is connected to the external heating medium end, so as to introduce the heating medium into the longitudinal activation wheel 41 for heating through the longitudinal heating connection port 414.

[0040] Preferably, a clamping device (not shown in the figure) for positioning and clamping the fabric edge is also provided between the transverse activation wheel group 3 and the longitudinal activation wheel group 4 to prevent the fabric from deforming under the stretching in different directions during elastic activation. The clamping device includes a drive shaft, which is set at both ends of the frame 11, and the tensioning rollers are symmetrically arranged on the inner side of the coaxial axis. Mounting components for fixing the tensioning rollers are symmetrically arranged on the frame 11, and the mounting components are set corresponding to the tensioning rollers. A moving part is provided inside the mounting component, and a threaded rod is provided on the moving part. The threaded rod is set inside the threaded hole of the mounting component, and a support shaft is provided in the shaft hole of the threaded rod. Clamping rollers are symmetrically arranged on the inner side of the support shaft 7, and a sponge layer is provided on the outer wall of the tensioning roller and the clamping roller. A corresponding drive motor is provided on the outer side of the drive shaft, and the drive motor drives the drive shaft to rotate, thereby driving the tensioning roller to rotate. It should be noted that a connecting component is also provided between the tensioning roller and the clamping roller to control the rotation resistance and ensure that the tension of the nonwoven fabric is uniform during the tensioning process.

[0041] Preferably, the connecting assembly includes two sets of auxiliary components disposed at both ends of the frame 11. Each auxiliary component contains a guide component, and two sets of limiting components are symmetrically arranged on the guide components. These two sets of limiting components are respectively connected to the drive shaft and the support shaft. An adjusting assembly is provided on each of the two sets of limiting components. The adjusting assembly includes a connecting post on one set of limiting components and a connecting tube on the other set of limiting components. The connecting post is disposed within the inner cavity of the connecting tube, and a nut is disposed on the external thread of the connecting tube. A spring is disposed on the nut, and the other end of the spring is connected to the limiting component with the connecting post. A damping pad is disposed at the contact end of the limiting component with the drive shaft and the support shaft. The adjusting assembly (connecting post, connecting tube, nut, and spring) allows for fine adjustment of the relative rotational resistance between the stretching roller and the clamping roller, ensuring uniform tension of the nonwoven fabric during the stretching process and improving the forming quality and dimensional stability of the nonwoven fabric. Tightening the nut compresses or releases the spring, thereby changing the pressure of the limiting component on the drive shaft and the support shaft, enabling rapid adjustment of the stretching tension, reducing downtime for adjustment, and improving production efficiency. The damping pads installed at the contact ends of the limiting components with the drive shaft and support shaft effectively absorb vibration, reduce mechanical wear, extend equipment service life, and reduce operating noise. The movement trajectory of the limiting components is limited by the cooperation of auxiliary components and guide components.

[0042] Specifically, the cooling guide wheel assembly 5 is located at the lower end of the longitudinal activation wheel assembly 4. The cooling guide wheel assembly 5 includes a cooling wheel and a cooling connection port 51. The two sides of the cooling wheel are fixedly connected to the frame, and in this embodiment, two cooling wheels are provided to ensure the tension and cooling of the fabric on the wheel assembly. A cooling pipe is provided in the middle of the cooling wheel, and the cooling connection port 51 is located at one end of the cooling pipe, with one end of the cooling connection port 51 communicating with the cooling pipe. In this embodiment, the cooling connection port 51 is located at the end away from the drive chamber 12, and the other end of the cooling connection port 51 is communicating with an external cooling medium to allow the cooling medium to be introduced into the cooling wheel to cool the fabric after activation.

[0043] like Figures 7-8 As shown, the nonwoven fabric used in this activation device includes a first skin-friendly layer and a second skin-friendly layer, with an elastic layer composed of several wavy elastic fibers between the first and second skin-friendly layers. The first skin-friendly layer, the elastic layer, and the second skin-friendly layer are laminated and fused together into a single structure. The elastic layer has a single fiber web structure, and the crests of the longitudinally placed elastic fibers are fixedly connected to the troughs of the transversely placed elastic fibers. The fiber structure of the wavy elastic fibers is a core-sheath structure. Figure 8 (as shown in a) or parallel structure ( Figure 8 (As shown in b). The core-shell structure includes an inner core and an outer sheath, with the outer sheath completely covering the outer end of the inner core, and the ratio of the radius of the inner core to the thickness of the outer sheath is 1:1~9; the parallel structure includes a first parallel component and a second parallel component, which are combined in parallel, and the volume ratio of the first parallel component to the second parallel component is 1~9:9~1.

[0044] The structure of the first and second skin-friendly layers and their relationship with the elastic layer are described in the technical solution disclosed in our company's patent number CN202411312920.7, which describes a high-elasticity nonwoven fabric.

[0045] Working principle:

[0046] The nonwoven fabric is first guided into the machine body 1 by the guide wheel group 2, and the tension is selectively adjusted by the side guide auxiliary wheel 221. Then the fabric enters the transverse activation wheel group 3, where the grooves arranged transversely on the outer periphery of the two wheels engage the fabric, and at the same time, the heating medium is introduced into the heating channel inside the wheel through the transverse heating connection port 314 to achieve transverse stretching heating activation. After activation, the fabric enters the longitudinal activation wheel group 4, where the teeth arranged longitudinally on its outer periphery engage with the heating medium introduced into the longitudinal heating connection port 414 to achieve longitudinal stretching heating activation. Finally, the fabric is cooled and shaped by the cooling guide wheel group 5 through the cooling connection port 51.

Claims

1. A two-component elastic activation device, characterized in that: It includes the fuselage (1), the guide wheel assembly (2), the lateral activation wheel assembly (3), the longitudinal activation wheel assembly (4), and the cooling guide wheel assembly (5); The fuselage (1) is fixedly installed on the ground; The guide wheel assembly (2) is installed on the machine body (1) and is used to guide the movement and flattening of the nonwoven fabric; The transverse activation wheel assembly (3) is installed inside the machine body (1) and is located after the guide wheel assembly (2). The transverse activation wheel assembly (3) is slidably connected to the machine body (1), and a heating channel is provided inside it to realize the transverse elastic activation of the nonwoven fabric. The longitudinal activation wheel assembly (4) is installed inside the machine body (1) and is located after the transverse activation wheel assembly (3). The longitudinal activation wheel assembly (4) is slidably connected to the machine body (1), and a heating channel is provided inside it to realize the longitudinal elastic activation of the nonwoven fabric. The cooling guide wheel assembly (5) is installed on the machine body (1) and is located after the longitudinal activation wheel assembly (4) for cooling and shaping the activated nonwoven fabric.

2. The two-component elastic activation device according to claim 1, characterized in that: The guide wheel assembly (2) includes an upper guide wheel (21) and a side guide main wheel (22). The upper guide wheel (21) is fixed to the upper end of the machine body (1), and the side guide main wheel (22) is located on the side edge of the machine body (1) and below the upper guide wheel (21). A side guide auxiliary wheel (221) is also provided next to the side guide main wheel (22). Nonwoven fabric can be selectively wound on the side guide auxiliary wheel (221) to adjust the tension of the nonwoven fabric.

3. The two-component elastic activation device according to claim 1, characterized in that: The transverse activation wheel assembly (3) includes two intermeshing transverse activation wheels (31) and expansion and flattening rollers (32) respectively disposed on the outer periphery of the corresponding transverse activation wheels (31). The outer periphery of the transverse activation wheels (31) is provided with transversely arranged grooves. The depth of the grooves is determined by the transverse elasticity ratio of the activated product through the intermeshing of the grooves. The transverse activation wheels (31) are slidably connected to the first slide rail (312) through the first mounting base (311) and the displacement is controlled by the first sliding drive component (313). One end of the transverse activation wheel (31) is provided with a transverse heating connection port (314) for introducing a heating medium. The non-woven fabric passes through the expansion and flattening roller (32) and the corresponding transverse activation wheel (31) to be flattened and guided into the transverse activation wheels (31).

4. The two-component elastic activation device according to claim 3, characterized in that: The outer side of the expansion and flattening roller (32) is provided with grooves that mesh with the transverse activation wheel (31) so as to perform transverse activation while flattening.

5. The two-component elastic activation device according to claim 1, characterized in that: The longitudinal activation wheel assembly (4) includes two meshing longitudinal activation wheels (41), with longitudinally arranged concave and convex teeth on their outer periphery. The meshing depth of the teeth is determined by the longitudinal elasticity ratio of the activated product. The longitudinal activation wheel (41) is slidably connected to the third slide rail (412) through the third mounting base (411), and its displacement is controlled by the third sliding drive component (413). One end of the longitudinal activation wheel (41) is provided with a longitudinal heating connection port (414) for introducing a heating medium.

6. The two-component elastic activation device according to claim 1, characterized in that: The cooling guide wheel assembly (5) includes a cooling wheel and a cooling connection port (51). The cooling wheel is equipped with a cooling pipe, and the cooling connection port (51) is connected to the external cooling medium to achieve cooling.

7. The two-component elastic activation device according to claim 1, characterized in that: It also includes a clamping device disposed between the transverse activation wheel group (3) and the longitudinal activation wheel group (4) for positioning and clamping the edge of the fabric.

8. The two-component elastic activation device according to claim 1, characterized in that: The nonwoven fabric used in the activation device includes a first skin-friendly layer and a second skin-friendly layer, with an elastic layer composed of several wavy elastic fibers between the first skin-friendly layer and the second skin-friendly layer; the first skin-friendly layer, the elastic layer and the second skin-friendly layer are composited and fused into a single structure on a line; the elastic layer is a single fiber mesh structure, and the crests of the longitudinally placed elastic fibers are fixedly connected to the troughs of the transversely placed elastic fibers.

9. A two-component elastic activation device according to claim 8, characterized in that: The fiber structure of the wavy elastic fiber is a core-sheath structure; the core-sheath structure includes an inner core and an outer sheath, the outer sheath completely covers the outer end of the inner core, and the ratio of the radius of the inner core to the thickness of the outer sheath is 1:1~9.

10. A two-component elastic activation device according to claim 8, characterized in that: The wavy elastic fiber has a parallel structure; the parallel structure includes a first parallel component and a second parallel component, the first parallel component and the second parallel component are combined in parallel, and the volume ratio of the first parallel component and the second parallel component is 1~9:9~1.

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