High-elasticity nylon fabric and production method
By dispersing functional nanoparticles in a nylon matrix to form a specific topological structure, combined with dynamic stress field treatment, the problems of insufficient durability and energy absorption efficiency of high-elasticity nylon fabrics are solved, achieving efficient energy dissipation and elastic recovery of the fabric.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YIBIN HECHENG TEXTILE TECH CO LTD
- Filing Date
- 2026-03-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing high-elasticity nylon fabrics have shortcomings in terms of durability and energy absorption efficiency. Traditional methods lead to the aggregation of nanoparticles and cannot effectively improve performance. Furthermore, finishing processes fail to effectively regulate the interfacial interaction between nanoparticles inside the fiber and the matrix.
By uniformly dispersing functional nanoparticles in a nylon matrix and forming a specific topological structure through wet spinning and multi-stage drawing processes, combined with dynamic stress field treatment, the dynamic reconstruction of non-covalent bonds at the interface is activated, thereby improving the dispersion of nanoparticles in the matrix and the interfacial compatibility.
It improves the fabric's elastic recovery and energy absorption efficiency, solves the performance degradation problem caused by nanoparticle aggregation, and enhances the fabric's fatigue life and deformation recovery uniformity.
Smart Images
Figure CN122169232A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nylon fabric technology, specifically to a high-elasticity nylon fabric and its production method. Background Technology
[0002] Traditional high-elasticity nylon fabrics mainly achieve elasticity by physically blending elastic fibers or chemically modifying nylon fibers. Physical blending has problems such as easy aging and poor durability of elastic fibers, and the elasticity of the fabric will significantly decrease with the number of uses. Chemical modification often comes at the cost of sacrificing the original strength and abrasion resistance of nylon materials, and the process is complex and costly.
[0003] However, existing technologies improve performance by adding nanoparticles to the nylon matrix, but these nanoparticles are usually used as simple fillers. They have poor dispersibility and are prone to agglomeration in the matrix. This not only fails to effectively improve performance but also becomes a stress concentration point, leading to early material failure. In addition, traditional finishing processes are mostly focused on surface treatment and fail to effectively control the interfacial interaction between the nanoparticles inside the fiber and the matrix, so that the potential performance of the composite material cannot be fully utilized. In particular, for the dynamic impact protection requirements under high strain rates, existing nylon fabrics generally have defects such as low energy absorption efficiency and insufficient modulus adaptability. Summary of the Invention
[0004] This invention addresses the technical problems existing in the prior art by providing a high-elasticity nylon fabric and its production method.
[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A high-elasticity nylon fabric and its production method, comprising the following steps:
[0006] A composite spinning solution was obtained in which functional nanoparticles were uniformly dispersed in a nylon matrix solution;
[0007] The fiber forming process is performed by spinning based on the composite spinning solution through spinning equipment, and nanoparticles are induced to form a specific topological structure inside the fiber during the forming process.
[0008] The finishing process involves dynamic stress field treatment of the formed fiber fabric.
[0009] Fabric properties are determined based on the elastic recovery rate and energy absorption performance of the tested fabric under quasi-static and dynamic impact loads.
[0010] In a preferred embodiment, the functional nanoparticles are surface-modified silica nanoparticles with a particle size range of 10-50 nanometers, and the surface is grafted with functional groups that can form hydrogen bonds with the nylon matrix.
[0011] The specific steps for obtaining the composite spinning solution include: distributing and mixing surface-modified silica nanoparticles at a mass fraction of 5% to 15% with a nylon 66 salt solution with a relative viscosity of 2.4 to 2.8;
[0012] The mixing process is carried out at 60-80℃, and the mixture is stirred continuously at a stirring speed of 200-400rpm for 2-4 hours. Then the mixture is allowed to stand for degassing for 0.5-1.5 hours to obtain a uniform and stable composite spinning solution.
[0013] In a preferred embodiment, the fiber forming process includes a combined process of wet spinning and specific drawing, specifically: after the composite spinning solution is extruded through a spinneret, it enters a coagulation bath at a temperature of 20-30°C to complete the initial forming, wherein the coagulation bath is a mixed solution of water and N,N-methylformamide with a mass ratio of 7:3 to 8:2.
[0014] The initially formed fibers then enter a multi-stage drawing zone with a total draw ratio of 3.5-5.0 times, and the final stage of drawing is carried out in a steam atmosphere at 90-110°C.
[0015] In a preferred embodiment, the dynamic stress field treatment involves placing the woven fabric in a device capable of applying bidirectional tensile strain, and applying a bidirectional tensile load with a periodic frequency between 0.5 and 5 Hz and a periodic strain amplitude between 5% and 15% to the fabric in an environment of 50-70°C for a treatment time of 10 to 30 minutes.
[0016] In a preferred embodiment, the performance metrics tested include:
[0017] a. Elastic recovery rate of the fabric after 100 tensile recovery cycles under a quasi-static tensile test with a strain rate of 0.001 s⁻¹;
[0018] b. At a strain rate of 100 s -1 The absorption rate of the fabric to impact energy under dynamic impact testing.
[0019] The present invention also provides a high-elasticity nylon fabric, which is woven from composite nylon fibers containing functional nanoparticles, wherein the functional nanoparticles form an oriented chain-like or cluster-like topological structure along the fiber axis inside the fiber.
[0020] In a preferred embodiment, the elastic properties of the fabric are strain rate sensitive, meaning that when the strain rate of the fabric changes from 0.001 s⁻¹... -1 Increase to 100 s -1 At that time, its initial modulus increased by 80% to 150%.
[0021] In a preferred embodiment, the fabric is a fabric that has undergone dynamic stress field treatment. The conditions for dynamic stress field treatment include: applying a biaxial tensile load with a frequency varying between 0.5 and 5 Hz and a strain amplitude varying between 5% and 15% at 50-70°C for a treatment time of 10 to 30 minutes.
[0022] In a preferred embodiment, the nylon matrix is one of nylon 66, nylon 6, and copolymers thereof, and the functional nanoparticles are one of surface-modified silica, silicon carbide, and aluminum nitride.
[0023] In a preferred embodiment, the mass fraction of functional nanoparticles in the fabric is 5% to 15%.
[0024] A further improvement of this invention lies in the following: By modifying the surface of nanoparticles and grafting functional groups that can form hydrogen bonds with the nylon matrix, this invention improves the dispersion and interfacial compatibility of nanoparticles in the matrix, solving the problems of easy agglomeration of nanoparticles and weak interfacial bonding. Furthermore, by combining wet spinning with multi-stage drawing processes, the invention induces nanoparticles to form an axially oriented topological structure within the fiber. By introducing dynamic stress field treatment and applying periodically variable frequency and amplitude bidirectional tensile loads at specific temperatures, the dynamic reconstruction of non-covalent bonds at the interface is activated, solving the problem that post-treatment processes cannot optimize the interfacial state within the fiber.
[0025] The beneficial effects of this invention are: by modifying the surface, this invention ensures that the nanoparticles are dispersed in the form of aggregates and bonded to the nylon matrix through hydrogen bonds, thus avoiding the performance degradation caused by aggregation. The topological structure formed inside the fiber can induce energy dissipation when subjected to force, thereby improving the elastic recovery ability and energy absorption efficiency of the fabric. Attached Figure Description
[0026] Figure 1 This is a flowchart of the present invention. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0029] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0030] like Figure 1 This embodiment provides: a high-elasticity nylon fabric and its production method, including the following steps:
[0031] A composite spinning solution is obtained by uniformly dispersing functional nanoparticles in a nylon matrix solution;
[0032] The fiber forming process is performed by spinning based on the composite spinning solution through spinning equipment, and nanoparticles are induced to form a specific topological structure inside the fiber during the forming process.
[0033] The post-processing involves dynamic stress field treatment of the formed fiber fabric.
[0034] Fabric properties are determined based on the elastic recovery rate and energy absorption performance of the tested fabric under quasi-static and dynamic impact loads.
[0035] Furthermore, the functional nanoparticles are surface-modified silica nanoparticles with a particle size range of 10-50 nanometers, and their surfaces are grafted with functional groups that can form hydrogen bonds with the nylon matrix.
[0036] The specific steps for obtaining the composite spinning solution include: distributing and mixing surface-modified silica nanoparticles at a mass fraction of 5% to 15% with a nylon 66 salt solution with a relative viscosity of 2.4 to 2.8;
[0037] The mixing process is carried out at 60-80℃, and the mixture is stirred continuously at a stirring speed of 200-400rpm for 2-4 hours. Then the mixture is allowed to stand for degassing for 0.5-1.5 hours to obtain a uniform and stable composite spinning solution.
[0038] It should be noted that the functional groups grafted onto the surface of silica nanoparticles and the amide groups on the nylon molecular chains achieve interfacial bonding through hydrogen bonding interactions. Essentially, the NH bond hydrogen atoms of the amide groups in the nylon chains act as electron donors, forming NH…N hydrogen bonds with the arc pair electrons of the nitrogen atoms of the amino groups on the nanoparticle surface, or forming NH…O=C hydrogen bonds with the oxygen atoms of the carboxyl groups. At the same time, the OH bond hydrogen atoms of the carboxyl groups on the nanoparticle surface also act as electron donors, forming OH…O=C hydrogen bonds with the carbonyl oxygen atoms of the amide groups in the nylon chains. Hydrogen bonds establish molecular-level connections between rigid nanoparticles and flexible nylon molecular chains. When the material is subjected to stress, the load acting on the nylon matrix can be transferred to the dispersed nanoparticles through hydrogen bonds, allowing these particles to bear most of the stress and improving the strength of the material.
[0039] Furthermore, the fiber forming process includes a combined process of wet spinning and specific drawing, specifically: after the composite spinning solution is extruded through a spinneret, it enters a coagulation bath at a temperature of 20-30°C to complete the initial forming. The coagulation bath is a mixed solution of water and N,N-methylformamide with a mass ratio of 7:3 to 8:2.
[0040] The initially formed fibers then enter a multi-stage drawing zone with a total draw ratio of 3.5-5.0 times, and the final stage of drawing is carried out in a steam atmosphere at 90-110°C.
[0041] It should be noted that the working process of the multi-stage draw zone is as follows:
[0042] The initially formed fiber passes through a multi-stage drawing zone composed of multiple sets of guide rollers or drawing rollers with increasing speeds. Under the action of gradually increasing axial stress, the nylon macromolecular chain segments, molecular chains, and aggregated structures within the fiber are forced to undergo relative slippage, untangle, and reorient and rearrange themselves along the fiber axis.
[0043] In the multi-stage early drafting stage, a relatively low drafting ratio is applied. The main function of this stage is to make the physical morphology of the fiber reach the target specifications, and to make the molecular chains in the amorphous region begin to extend and initially orient, and to untangle some large entanglements, so as to provide a more uniform starting point for higher drafting ratios and avoid local stress concentration and fiber breakage due to structural inhomogeneity.
[0044] Multi-stage intermediate stretching is carried out at higher speeds and stresses. The main function of this stage is to further straighten the nylon molecules. Under the synergistic effect of stress and temperature, the highly stretched molecular chain segments are arranged more regularly into the lattice, promoting increased crystallinity and the formation and orientation of microcrystals. The nanoparticles dispersed in the nylon matrix are subjected to viscous drag forces from the polymer medium in the flow field created by the strong stretching and rearrangement of the surrounding molecular chains. Due to their small particle size and interfacial interaction with the matrix, they cannot move freely. Instead, under these conditions, they migrate, rotate, and rearrange along the dominant stress direction, thus beginning to form chain-like or cluster-like topologies along the fiber axis.
[0045] The final stage of stretching is carried out in a steam atmosphere of 90-110℃. Under this temperature environment, the mobility of nylon macromolecular chain segments is activated, the relaxation time of the chain segments is shortened, and under the combined action of continuous tensile stress and thermal activation, the high stress state formed in the previous stretching is partially relaxed. The molecular chains obtain sufficient energy to adjust under new and more extended conditions, fixing the highly oriented molecular chain structure and the initially formed nanoparticle topology, thus stabilizing the structure. The heat optimizes the interfacial bonding between the nanoparticles and the nylon matrix, and allows the nanoparticles to make final fine adjustments in their formed chain or cluster configuration, ultimately locking in the specific spatial topology.
[0046] Furthermore, the dynamic stress field treatment involves placing the woven fabric in a device capable of applying bidirectional tensile strain, and applying a bidirectional tensile load to the fabric at an environment of 50-70°C. The load has a periodic frequency of 0.5-5 Hz and a periodic strain amplitude of 5%-15%. The treatment time is 10-30 minutes.
[0047] Furthermore, the performance metrics tested include:
[0048] a. At a strain rate of 0.001 s -1 Under quasi-static tensile testing, the fabric undergoes 100 tensile recovery cycles, and its elastic recovery rate is measured.
[0049] b. At a strain rate of 100 s⁻¹ -1 The absorption rate of the fabric to impact energy under dynamic impact testing.
[0050] This invention also provides a high-elasticity nylon fabric, which is woven from composite nylon fibers containing functional nanoparticles, wherein the functional nanoparticles form an oriented chain-like or cluster-like topological structure along the fiber axis inside the fiber.
[0051] Furthermore, the elastic properties of the fabric are strain rate sensitive; when the strain rate of the fabric changes from 0.001 s⁻¹... -1Increase to 100 s -1 At that time, its initial modulus increased by 80% to 150%.
[0052] Furthermore, the fabric is a fabric that has undergone dynamic stress field treatment. The conditions for dynamic stress field treatment include: applying a biaxial tensile load with a frequency varying between 0.5 and 5 Hz and a strain amplitude varying between 5% and 15% at 50-70℃ for a treatment time of 10 to 30 minutes.
[0053] It should be noted that biaxial tensile load refers to tensile stress applied simultaneously or in a specific manner in two mutually perpendicular directions within the plane of the fabric. Biaxial tensile load induces a multiaxial stress state in the fabric. When biaxial tensile load is applied to the fabric, it constructs a uniformly distributed stress field within the fabric plane, which is highly similar to the stress state experienced by the fabric in actual use.
[0054] Under uniaxial tension, the yarn mainly slips and stretches along the axial direction, while the weft yarn is simply straightened. However, under biaxial tension, the nodes where the warp and weft yarns intersect become the core areas for stress concentration and transmission. The load forces the yarns in both warp and weft directions to bear tension simultaneously, limiting excessive relative slippage between the yarns and causing uniform deformation of the fabric structure.
[0055] In the planar stress field created by biaxial stretching, the fiber is not only stretched axially, but its cross section is also subjected to compression from the vertical direction. This composite stress state further acts on the fiber interior, causing the nano-topology to be stably arranged and anchored in space along the direction of the stress field.
[0056] The textile and weaving process leaves uneven internal stresses inside the fabric. Biaxial tensile load can relax and redistribute these uneven internal stresses under the combined action of heat and moisture, eliminating potential local stress concentration points and improving the fatigue life and deformation recovery uniformity of the fabric.
[0057] Furthermore, the nylon matrix is one of nylon 66, nylon 6, and their copolymers, and the functional nanoparticles are one of surface-modified silica, silicon carbide, and aluminum nitride.
[0058] Furthermore, the mass fraction of functional nanoparticles in the fabric is 5% to 15%.
[0059] Example 1
[0060] This invention provides a high-elasticity nylon fabric, comprising the following steps:
[0061] To obtain the composite spinning solution: Surface-modified silica nanoparticles were mixed with a nylon 66 salt solution with a relative viscosity of 2.6 at a mass fraction of 8%. The silica nanoparticles had a particle size of 30 nm. The mixture was stirred continuously at 300 rpm for 3 hours at 70 °C, and then allowed to stand for 1 hour to remove bubbles, thus obtaining the composite spinning solution.
[0062] Fiber forming: The composite spinning solution is extruded through a spinneret and then initially formed in a coagulation bath at a temperature of 25°C. The coagulation bath is a mixed solution of water and N,N-dimethylformamide with a mass ratio of 75:25. The initially formed fiber then enters a multi-stage drawing zone with a total draw ratio of 4.2 times. The final stage of drawing is carried out in a steam atmosphere at 100°C.
[0063] Finishing: The woven fabric is placed in a device that can apply biaxial tensile strain. Under an environment of 60°C, a biaxial tensile load with a frequency varying between 1-3 Hz and a strain amplitude varying between 8% and 12% is applied to the fabric for 20 minutes.
[0064] Determine fabric properties: Test the elastic recovery rate of the fabric under quasi-static tension and the energy absorption rate of the fabric under dynamic impact.
[0065] Example 2
[0066] This invention provides a high-elasticity nylon fabric, comprising the following steps:
[0067] To obtain the composite spinning solution: Surface-modified silica nanoparticles were mixed with a nylon 66 salt solution with a relative viscosity of 2.5 at a mass fraction of 12%. The silica nanoparticles had a particle size of 25 nm. The mixture was stirred continuously at 350 rpm for 3.5 hours at 75°C, and then allowed to stand for 1 hour to remove bubbles, thus obtaining the composite spinning solution.
[0068] Fiber forming: The composite spinning solution is extruded through a spinneret and then initially formed in a coagulation bath at a temperature of 22°C. The coagulation bath is a mixed solution of water and N,N-dimethylformamide with a mass ratio of 75:25. The initially formed fiber then enters a multi-stage drawing zone with a total draw ratio of 4.8 times. The final stage of drawing is carried out in a steam atmosphere at 105°C.
[0069] Finishing: The woven fabric is placed in a device that can apply biaxial tensile strain. Under an environment of 65°C, a biaxial tensile load with a frequency varying between 2-4 Hz and a strain amplitude varying between 10% and 15% is applied to the fabric for 25 minutes.
[0070] Determine fabric properties: Test the elastic recovery rate of the fabric under quasi-static tension and the energy absorption rate of the fabric under dynamic impact.
[0071] Example 3
[0072] This invention provides a high-elasticity nylon fabric, comprising the following steps:
[0073] To obtain the composite spinning solution: Surface-modified silicon carbide nanoparticles were mixed with a nylon 6 salt solution with a relative viscosity of 2.7 at a mass fraction of 10%. The silicon dioxide nanoparticles had a particle size of 40 nm. The mixture was stirred continuously at 280 rpm for 4 hours at 65°C, and then allowed to stand for degassing for 0.8 hours to obtain the composite spinning solution.
[0074] Fiber forming: The composite spinning solution is extruded through a spinneret and then initially formed in a coagulation bath at a temperature of 28°C. The coagulation bath is a mixed solution of water and N,N-dimethylformamide with a mass ratio of 70:30. The initially formed fiber then enters a multi-stage drawing zone with a total draw ratio of 4.0 times. The final stage of drawing is carried out in a steam atmosphere at 95°C.
[0075] Finishing: The woven fabric is placed in a device that can apply biaxial tensile strain. At 55°C, a biaxial tensile load with a frequency varying between 0.8-2 Hz and a strain amplitude varying between 5% and 10% is applied to the fabric for 15 minutes.
[0076] Determine fabric properties: Test the elastic recovery rate of the fabric under quasi-static tension and the energy absorption rate of the fabric under dynamic impact.
[0077] Example 4
[0078] This invention provides a high-elasticity nylon fabric, comprising the following steps:
[0079] To obtain the composite spinning solution: Surface-modified silica nanoparticles with a particle size of 30 nm were mixed with a nylon 66 salt solution with a relative viscosity of 2.4 at a mass fraction of 6%. The mixture was stirred continuously at 250 rpm for 2.5 hours at 65°C, and then allowed to stand for 1.2 hours to remove bubbles, thus obtaining the composite spinning solution.
[0080] Fiber forming: The composite spinning solution is extruded through a spinneret and then initially formed in a coagulation bath at a temperature of 30°C. The coagulation bath is a mixed solution of water and N,N-dimethylformamide with a mass ratio of 80:20. The initially formed fiber then enters a multi-stage drawing zone with a total draw ratio of 3.6 times. The final stage of drawing is carried out in a steam atmosphere at 90°C.
[0081] Finishing: The woven fabric is placed in a device that can apply biaxial tensile strain. Under an environment of 50°C, a biaxial tensile load with a frequency varying between 1-2 Hz and a strain amplitude varying between 6% and 8% is applied to the fabric for 10 minutes.
[0082] Determine fabric properties: Test the elastic recovery rate of the fabric under quasi-static tension and the energy absorption rate of the fabric under dynamic impact.
[0083] Example 5
[0084] This invention provides a high-elasticity nylon fabric, comprising the following steps:
[0085] To obtain the composite spinning solution: Surface-modified aluminum nitride nanoparticles were mixed with a nylon 66 salt solution with a relative viscosity of 2.6 at a mass fraction of 9%. The silica nanoparticles had a particle size of 50 nm. The mixture was stirred continuously at 320 rpm for 3 hours at 78 °C, and then allowed to stand for 1 hour to remove bubbles, thus obtaining the composite spinning solution.
[0086] Fiber forming: The composite spinning solution is extruded through a spinneret and then initially formed in a coagulation bath at a temperature of 25°C. The coagulation bath is a mixed solution of water and N,N-dimethylformamide with a mass ratio of 77:23. The initially formed fiber then enters a multi-stage drawing zone with a total draw ratio of 4.5 times. The final stage of drawing is carried out in a steam atmosphere at 108°C.
[0087] Post-processing: The woven fabric is placed in a device that can apply biaxial tensile strain. At 68°C, a biaxial tensile load with a frequency varying between 1.5 and 3.5 Hz and a strain amplitude varying between 7% and 13% is applied to the fabric for 22 minutes.
[0088] Determine fabric properties: Test the elastic recovery rate of the fabric under quasi-static tension and the energy absorption rate of the fabric under dynamic impact.
[0089] Based on Examples 1-5, the following table can be derived:
[0090] Table 1
[0091]
[0092] As shown in Table 1:
[0093] By adjusting the nanoparticle content, stretch ratio, and finishing temperature, precise control of fabric performance was achieved. In Example 2, a chain-like nanotopological structure was formed under conditions of 12% nanoparticle content and 4.8 times stretch ratio, steam stretching at 105℃ and finishing at 65℃, which is suitable for preparing high-modulus fabrics. In Example 4, an island-like nanostructure was formed under mild conditions of 6% nanoparticle content and 3.6 times stretch ratio, steam stretching at 90℃ and finishing at 50℃, which is suitable for producing soft fabrics.
[0094] When the content of nanoparticles increases by 2%, the draw ratio is increased by 0.3-0.4 times and the finishing temperature is increased by 5-8℃, which can effectively achieve the performance transition from soft to reinforced.
[0095] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0096] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0097] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A method for producing a high-elasticity nylon fabric, characterized in that, Includes the following steps: A composite spinning solution was obtained in which functional nanoparticles were uniformly dispersed in a nylon matrix solution; The fiber forming process is performed by spinning based on the composite spinning solution through spinning equipment, and nanoparticles are induced to form a specific topological structure inside the fiber during the forming process. The finishing process involves dynamic stress field treatment of the formed fiber fabric. Fabric properties are determined based on the elastic recovery rate and energy absorption performance of the tested fabric under quasi-static and dynamic impact loads.
2. The method for producing a high-elasticity nylon fabric according to claim 1, characterized in that, The functional nanoparticles are surface-modified silica nanoparticles with a particle size range of 10-50 nanometers, and their surfaces are grafted with functional groups that can form hydrogen bonds with the nylon matrix. The specific steps for obtaining the composite spinning solution include: distributing and mixing surface-modified silica nanoparticles at a mass fraction of 5% to 15% with a nylon 66 salt solution with a relative viscosity of 2.4 to 2.8; The mixing process is carried out at 60-80℃, and the mixture is stirred continuously at a stirring speed of 200-400rpm for 2-4 hours. Then the mixture is allowed to stand for degassing for 0.5-1.5 hours to obtain a uniform and stable composite spinning solution.
3. The method for producing a high-elasticity nylon fabric according to claim 1, characterized in that, The fiber forming process includes a combined process of wet spinning and specific drawing, specifically: after the composite spinning solution is extruded through a spinneret, it enters a coagulation bath at a temperature of 20-30°C to complete the initial forming. The coagulation bath is a mixed solution of water and N,N-methylformamide with a mass ratio of 7:3 to 8:
2. The initially formed fibers then enter a multi-stage drawing zone with a total draw ratio of 3.5-5.0 times, and the final stage of drawing is carried out in a steam atmosphere at 90-110°C.
4. The method for producing a high-elasticity nylon fabric according to claim 1, characterized in that, The dynamic stress field treatment involves placing the woven fabric in a device capable of applying bidirectional tensile strain, and applying a bidirectional tensile load with a periodic frequency between 0.5 and 5 Hz and a periodic strain amplitude between 5% and 15% to the fabric in an environment of 50-70°C for a treatment time of 10 to 30 minutes.
5. The method for producing a high-elasticity nylon fabric according to claim 1, characterized in that, The performance metrics tested include: a. At a strain rate of 0.001 s -1 Under quasi-static tensile testing, the fabric undergoes 100 tensile recovery cycles, and its elastic recovery rate is measured. b. At a strain rate of 100 s⁻¹ -1 The absorption rate of the fabric to impact energy under dynamic impact testing.
6. A method for producing a high-elasticity nylon fabric, applied to the high-elasticity nylon fabric as described in any one of claims 1-5, characterized in that, The fabric is woven from composite nylon fibers containing functional nanoparticles, wherein the functional nanoparticles form oriented chain-like and cluster-like topological structures along the fiber axis inside the fiber.
7. The high-elasticity nylon fabric according to claim 1, characterized in that, The elastic properties of the fabric are strain rate sensitive; when the strain rate of the fabric changes from 0.001 s⁻¹... -1 Increase to 100 s -1 At that time, its initial modulus increased by 80% to 150%.
8. The high-elasticity nylon fabric according to claim 1, characterized in that, The fabric is a fabric that has undergone dynamic stress field treatment. The conditions for dynamic stress field treatment include: applying a biaxial tensile load with a frequency varying between 0.5 and 5 Hz and a strain amplitude varying between 5% and 15% at 50-70℃ for a treatment time of 10 to 30 minutes.
9. The high-elasticity nylon fabric according to claim 1, characterized in that, The nylon matrix is one of nylon 66, nylon 6 and their copolymers, and the functional nanoparticles are one of surface-modified silica, silicon carbide and aluminum nitride.
10. The high-elasticity nylon fabric according to claim 1, characterized in that, The mass fraction of functional nanoparticles in the fabric is 5% to 15%.