Production method of high-elasticity fabric

Abstract

The invention relates to the technical field of textile, in particular to a high-elasticity fabric production method which comprises the following steps: sequentially cleaning and drying spandex filaments, PET / PTT composite fibers and cotton fibers; obtaining a yarn core from the spandex yarn according to a preset traction multiple; twisting the PET / PTT composite fiber and the cotton fiber according to a preset proportion to form a wrapping line; wrapping the yarn core based on the wrapping thread to obtain an elastic doubling thread; when preliminarily judging that the preparation of the elastic doubling thread does not meet a preset standard based on an ultimate elongation change characteristic value, secondarily judging whether the preparation of the elastic doubling thread meets the preset standard or not according to a hairiness change characteristic value, or increasing the wrapping twist of the wrapping thread; when it is preliminarily judged that preparation of the elastic doubling threads meets the preset standard based on the ultimate elongation change characteristics, the elastic doubling threads meeting the preset standard are woven through a circular weaving machine to obtain the elastic fabric, and intelligent production of the high-elasticity fabric is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a production method of a high-elastic fabric. Background Art

[0002] High elastic fabric is a textile material with high stretch and recovery. This fabric can quickly return to its original shape and size after being stretched by external force, which makes it very suitable for clothing and products that require good elasticity and comfort, such as sportswear, swimwear, tights, underwear, socks and other clothing that requires good fit and freedom of movement. Among them, the elastic effect of the fabric mainly depends on the characteristics of the fiber used in the fabric. If the fiber has good elasticity, the elasticity of the fabric will also be good, otherwise the elasticity of the fabric will be poor.

[0003] Chinese patent publication number: CN111560689B, discloses a mercerized stretch fabric of high elastic flax coated XLA fiber and its preparation method, wherein the stretch fabric is woven from flax elastic core-spun yarn; the flax elastic core-spun yarn includes flax fiber, XLA elastic fiber, and an intermediate layer. It can be seen that the above technical solution lacks the necessary detection and control means for the silk thread used to prepare the elastic fabric. If the performance of the silk thread cannot be ensured when there are problems such as equipment aging or fluctuations in production parameters, the performance of the high elastic fabric will be uneven. Summary of the invention

[0004] To this end, the present invention provides a method for producing high-elastic fabrics to overcome the problem in the prior art that there is a lack of necessary detection and control means for the silk threads used to prepare the elastic fabrics. If the performance of the silk threads cannot be ensured when problems such as equipment aging or production parameter fluctuations occur, the problem of uneven performance of the high-elastic fabrics will result.

[0005] To achieve the above object, the present invention provides a method for producing a high-elastic fabric, comprising:

[0006] The spandex yarn, PET / PTT composite fiber and cotton fiber are washed and dried in sequence;

[0007] The spandex yarn is drawn at a preset multiple to obtain a yarn core;

[0008] Twisting the PET / PTT composite fiber and the cotton fiber into a wrapped wire according to a preset ratio;

[0009] Based on the wrapping yarn, the yarn core is coated to obtain elastic yarn;

[0010] When it is preliminarily determined based on the ultimate elongation variation characteristic value that the preparation of the elastic yarn does not meet the preset standard, it is secondarily determined based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard, or the coating twist of the wrapped yarn is increased;

[0011] When it is preliminarily determined based on the ultimate elongation variation characteristics that the preparation of the elastic yarn meets the preset standard, the elastic yarn that meets the preset standard is woven through a large circular loom to obtain an elastic fabric.

[0012] Further, the process of preliminarily determining that the preparation of the elastic yarn does not meet the preset standard based on the ultimate elongation change characteristic value includes:

[0013] Obtaining the ultimate elongation variation characteristic value;

[0014] Comparing the limit elongation change characteristic value with a first preset elongation threshold and a second preset elongation threshold respectively;

[0015] If the ultimate elongation variation characteristic value is greater than or equal to the first preset elongation threshold value and less than the second preset elongation threshold value, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and a secondary determination is made based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard;

[0016] If the ultimate elongation variation characteristic value is greater than or equal to the second preset elongation threshold, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and the wrapping twist of the wrapped yarn is increased according to the difference between the ultimate elongation variation characteristic value and the second preset elongation threshold.

[0017] Furthermore, the process of preliminarily determining whether the preparation of the elastic yarn meets the preset standard based on the ultimate elongation change characteristic value includes:

[0018] Obtaining the ultimate elongation variation characteristic value;

[0019] comparing the ultimate elongation change characteristic value with the first preset elongation threshold;

[0020] If the ultimate elongation change characteristic value is less than the first preset elongation threshold, it is determined that the preparation of the elastic yarn meets the preset standard, and the elastic yarn that meets the preset standard is woven through a large circular textile machine to obtain an elastic fabric.

[0021] Furthermore, the process of obtaining the ultimate elongation variation characteristic value includes:

[0022] Obtaining an original diameter of the elastic yarn and recording it as a first diameter;

[0023] Obtaining the breaking load of the elastic yarn;

[0024] Cutting a preset length of elastic yarn and loading the elastic yarn with a force of 90% of the breaking load;

[0025] After unloading, the yarn is allowed to stand still, and the diameter of the elastic yarn after the standing still is obtained and recorded as the second diameter;

[0026] The difference between the first diameter and the second diameter is recorded as the ultimate elongation change characteristic value.

[0027] Furthermore, several twist increasing methods are provided for increasing the covering twist, and each increasing method has a different increase range for the covering twist.

[0028] Furthermore, under the first preset condition, several correction methods are provided for correcting the covering twist, and each correction method has a different correction amplitude for the covering twist; the first preset condition is that the covering twist is increased and the breaking load of the elastic yarn after the adjusted covering twist is less than the preset breaking load.

[0029] Further, a secondary determination is made as to whether the preparation of the elastic yarn meets a preset standard based on the hairiness change characteristic value, wherein:

[0030] If the hairiness change characteristic value is less than a first preset hairiness threshold, it is determined that the preparation of the elastic yarn does not meet the preset standard and the preset traction multiple of the yarn core is reduced according to the difference between the first preset hairiness threshold and the hairiness change characteristic value;

[0031] If the hairiness change characteristic value is greater than or equal to the first preset hairiness threshold and less than the second preset hairiness threshold, it is determined that the preparation of the elastic yarn meets the preset standard and the elastic yarn meeting the preset standard is woven through a large circular textile machine to obtain an elastic fabric;

[0032] If the hairiness change characteristic value is greater than or equal to the second preset hairiness threshold, it is determined that the preparation of the elastic yarn does not meet the preset standard and the twisting angle of the wrapped yarn is reduced according to the difference between the hairiness change characteristic value and the second preset hairiness threshold.

[0033] Furthermore, the process of acquiring the hairiness change characteristic value includes:

[0034] Cutting a preset length of elastic yarn, obtaining the number of hairiness and the average length of hairiness of the elastic yarn and recording them as the first number of hairiness and the first average length of hairiness, respectively;

[0035] Obtaining the breaking load of the elastic yarn;

[0036] Applying a tensile force of 90% of the breaking load to the elastic yarn;

[0037] After unloading, the yarn is allowed to stand still, and the number of hairiness and the average hairiness length of the elastic yarn after the standing still are obtained and recorded as the second number of hairiness and the second average hairiness length, respectively;

[0038] A hairiness change characteristic value is obtained based on the first hairiness number, the first average hairiness length, the second hairiness number, and the second average hairiness length.

[0039] Furthermore, the reduction range of the preset traction multiple is positively correlated with the hairiness difference, wherein the hairiness difference is the difference between the first preset hairiness threshold and the hairiness change characteristic value.

[0040] Furthermore, several angle reduction methods are provided for reducing the twisting angle, and each angle reduction method has a different reduction range for the twisting angle.

[0041] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention combines spandex yarn, PET / PTT composite fiber and cotton fiber to form elastic yarn, sets quantitative indicators such as ultimate elongation change characteristic value, covering twist, and hairiness change characteristic value, and provides a variety of preparation parameter adjustment methods, thereby realizing the intelligentization of the high-elasticity fabric preparation process.

[0042] Furthermore, the present invention determines whether the preparation of the elastic fabric meets the preset standard by comparing the ultimate elongation change characteristic value of the elastic yarn with the preset elongation threshold, thereby ensuring the production quality of the high-elasticity fabric.

[0043] Furthermore, the present invention increases the wrapping twist of the wrapped thread according to the difference between the ultimate elongation change characteristic value and the second preset elongation threshold value when preliminarily determining that the preparation of the elastic yarn does not meet the preset standard, or secondary determines whether the preparation of the elastic yarn meets the preset standard according to the hairiness change characteristic value, thereby optimizing the production process of high-elastic fabrics.

[0044] Furthermore, the present invention provides several twist increasing methods for increasing the covering twist, and each increasing method has a different increasing range for the covering twist, thereby achieving precise control of the increasing range of the covering twist.

[0045] Furthermore, the present invention improves the production efficiency of high-elastic fabrics by secondarily determining whether the preparation of the elastic yarn meets the preset standard based on the characteristic value of the hairiness change.

[0046] Furthermore, the present invention quantifies the preparation quality of the elastic yarn by setting the characteristic value of the hairiness change, thereby improving the accuracy of the control of the production process of the high-elastic fabric.

[0047] Furthermore, the present invention achieves precise control of the reduction amplitude of the preset traction multiple by setting the reduction amplitude of the preset traction multiple to be positively correlated with the hairiness difference, wherein the hairiness difference is the difference between the first preset hairiness threshold and the hairiness change characteristic value.

[0048] Furthermore, the present invention provides several angle reduction methods for reducing the twisting angle, and each angle reduction method has a different reduction range of the twisting angle, thereby realizing dynamic adjustment of the reduction range of the twisting angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flow chart of a method for producing a high elastic fabric according to an embodiment of the present invention;

[0050] Figure 2 A flow chart of determining whether the preparation of the elastic yarn meets the preset standard according to an embodiment of the present invention;

[0051] Figure 3 A flowchart for secondarily determining whether the preparation of the elastic yarn meets the preset standard according to an embodiment of the present invention;

[0052] Figure 4 The present invention is a flowchart of determining a method for reducing the twist angle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] Those skilled in the art will appreciate that the method of the present invention for determining a single parameter mentioned above may be to select the value with the highest proportion as the preset standard parameter based on data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by using the formula as the preset standard parameter or other selection methods, as long as the method of the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0055] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0056] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a flow chart of a method for producing highly elastic fabrics according to an embodiment of the present invention; a flow chart of determining whether the preparation of the elastic yarn meets the preset standard according to an embodiment of the present invention; a flow chart of a second determination of whether the preparation of the elastic yarn meets the preset standard according to an embodiment of the present invention; a flow chart of determining a method for reducing the twist angle according to an embodiment of the present invention.

[0057] A method for producing a high-elastic fabric according to an embodiment of the present invention comprises:

[0058] Step S1, washing and drying the spandex yarn, PET / PTT composite fiber and cotton fiber in sequence;

[0059] Step S2, obtaining a yarn core by pulling the spandex yarn at a preset multiple of 4.8 times;

[0060] Step S3, twisting the PET / PTT composite fiber and the cotton fiber into a wrapped yarn according to a preset ratio of 4:1;

[0061] Step S4, coating the yarn core based on the wrapping line to obtain elastic yarn;

[0062] Step S5, when it is preliminarily determined based on the ultimate elongation variation characteristic value that the preparation of the elastic yarn does not meet the preset standard, secondarily determining based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard, or increasing the coating twist of the wrapped yarn;

[0063] Step S6, when it is preliminarily determined based on the ultimate elongation variation characteristics that the preparation of the elastic yarn meets the preset standard, the elastic yarn that meets the preset standard is woven through a large circular weaving machine to obtain an elastic fabric.

[0064] Specifically, the process of preliminarily determining that the preparation of the elastic yarn does not meet the preset standard based on the ultimate elongation change characteristic value includes:

[0065] Obtaining the ultimate elongation variation characteristic value;

[0066] Comparing the limit elongation change characteristic value with a first preset elongation threshold and a second preset elongation threshold respectively;

[0067] If the ultimate elongation variation characteristic value is greater than or equal to the first preset elongation threshold value and less than the second preset elongation threshold value, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and a secondary determination is made based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard;

[0068] If the ultimate elongation variation characteristic value is greater than or equal to the second preset elongation threshold, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and the covering twist of the wrapped yarn is increased according to the difference between the ultimate elongation variation characteristic value and the second preset elongation threshold;

[0069] Among them, the first preset elongation threshold is set to 0.114 mm, and the second preset elongation threshold is set to 0.289 mm.

[0070] Specifically, the process of preliminarily determining that the preparation of the elastic yarn meets the preset standard based on the ultimate elongation change characteristic value includes:

[0071] Obtaining the ultimate elongation variation characteristic value;

[0072] comparing the ultimate elongation change characteristic value with the first preset elongation threshold;

[0073] If the ultimate elongation change characteristic value is less than the first preset elongation threshold, it is determined that the preparation of the elastic yarn meets the preset standard, and the elastic yarn that meets the preset standard is woven through a large circular textile machine to obtain an elastic fabric.

[0074] Specifically, the process of obtaining the ultimate elongation variation characteristic value includes:

[0075] Obtaining an original diameter of the elastic yarn and recording it as a first diameter;

[0076] Obtaining the breaking load of the elastic yarn;

[0077] Cutting an elastic yarn of a preset length of 20 cm and loading the elastic yarn with a force of 90% of the breaking load;

[0078] After unloading, the yarn is allowed to stand still, and the diameter of the elastic yarn after the standing still is obtained and recorded as the second diameter;

[0079] The difference between the first diameter and the second diameter is recorded as the ultimate elongation change characteristic value.

[0080] Specifically, the breaking load of the elastic yarn can be obtained by a constant rate of elongation tester, which is not limited to any specific method and only needs to meet the breaking load measurement requirements.

[0081] Specifically, there are several twist increasing methods for increasing the covering twist, among which:

[0082] If the elongation difference is less than the first preset elongation difference of 0.046 mm, the covering twist is increased by using the first preset twist adjustment coefficient of 1.03;

[0083] If the elongation difference is greater than or equal to the first preset elongation difference and less than the second preset elongation difference of 0.075 mm, the covering twist is increased by using the second preset twist adjustment coefficient of 1.06;

[0084] If the elongation difference is greater than or equal to the second preset elongation difference, the third preset twist adjustment coefficient 1.09 is used to increase the covering twist; the difference between the ultimate elongation change characteristic value and the second preset elongation threshold is recorded as the elongation difference.

[0085] Specifically, under the first preset condition, several correction methods for the covering twist correction are provided, wherein:

[0086] If the correction difference is less than the first preset correction difference of 0.2N, the covering twist is corrected to a corresponding value using the first preset correction coefficient of 0.996;

[0087] If the correction difference is greater than or equal to the first preset correction difference and less than the second preset correction difference of 0.5N, the covering twist is corrected to the corresponding value using the second preset correction coefficient of 0.988;

[0088] If the correction difference is greater than or equal to the second preset correction difference, the covering twist is corrected to a corresponding value using a third preset correction coefficient of 0.979;

[0089] The correction difference is the difference between the preset breaking load and the breaking load of the elastic yarn after the covering twist is increased.

[0090] The first preset condition is that the covering twist is increased and adjusted and the breaking load of the elastic yarn after the adjusted covering twist is less than the preset breaking load of 1.6N.

[0091] Specifically, whether the preparation of the elastic yarn meets the preset standard is determined secondary according to the hairiness change characteristic value, wherein:

[0092] If the hairiness change characteristic value is less than the first preset hairiness threshold value of 1.13, it is determined that the preparation of the elastic yarn does not meet the preset standard and the preset traction multiple of the yarn core is reduced according to the difference between the first preset hairiness threshold value and the hairiness change characteristic value;

[0093] If the hairiness change characteristic value is greater than or equal to the first preset hairiness threshold and less than the second preset hairiness threshold of 1.54, it is determined that the preparation of the elastic yarn meets the preset standard and the elastic yarn meeting the preset standard is woven through a large circular textile machine to obtain an elastic fabric;

[0094] If the hairiness change characteristic value is greater than or equal to the second preset hairiness threshold, it is determined that the preparation of the elastic yarn does not meet the preset standard and the twisting angle of the wrapped yarn is reduced according to the difference between the hairiness change characteristic value and the second preset hairiness threshold.

[0095] Specifically, the process of obtaining the hairiness change characteristic value includes:

[0096] Cutting a preset length of elastic yarn, obtaining the number of hairiness and the average length of hairiness of the elastic yarn and recording them as the first number of hairiness and the first average length of hairiness, respectively;

[0097] Obtaining the breaking load of the elastic yarn;

[0098] Applying a tensile force of 90% of the breaking load to the elastic yarn;

[0099] After unloading, the yarn is allowed to stand still, and the number of hairiness and the average hairiness length of the elastic yarn after the standing still are obtained and recorded as the second number of hairiness and the second average hairiness length, respectively;

[0100] The hairiness change characteristic value is calculated by the following formula:

[0101]

[0102] In the formula, △M represents the characteristic value of hairiness change; N1 represents the first number of hairiness; N2 represents the second number of hairiness; L1 represents the first average hairiness length; L2 represents the second average hairiness length.

[0103] Specifically, the hairiness number and average hairiness length of the elastic yarn can be obtained by, for example, a YG171B yarn hairiness tester or a SY200 yarn hairiness tester, without any specific limitation, as long as the hairiness measurement requirements are met.

[0104] Specifically, the reduction amplitude of the preset traction multiple is positively correlated with the hairiness difference, wherein the hairiness difference is the difference between the first preset hairiness threshold and the hairiness change characteristic value. For example, the reduction amplitude of the preset traction multiple is set to △D, and the hairiness difference is set to △Φ, then △D=α×△Φ, α is the traction multiple adjustment coefficient, and α is set to 0.92. It can be understood that the larger the hairiness difference, the greater the reduction amplitude of the preset traction multiple.

[0105] Specifically, there are several angle reduction methods for reducing the twisting angle, among which:

[0106] If the hairiness characteristic difference is less than the first preset hairiness characteristic value of 0.08, the twist angle is reduced using the first preset twist angle adjustment coefficient of 0.94;

[0107] If the hairiness characteristic difference is greater than or equal to the first preset hairiness characteristic standard value and less than the second preset hairiness characteristic value 0.11, the second preset twisting angle adjustment coefficient 0.89 is used to reduce the twisting angle;

[0108] If the hairiness characteristic difference is greater than or equal to the second preset hairiness characteristic value, the twist angle is reduced using the third preset twist angle adjustment coefficient 0.86; the hairiness characteristic difference is the difference between the hairiness change characteristic value and the second preset hairiness threshold.

[0109] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for producing a high elastic fabric, characterized in that: include: The spandex yarn, PET / PTT composite fiber and cotton fiber are washed and dried in sequence; The spandex yarn is drawn at a preset multiple to obtain a yarn core; Twisting the PET / PTT composite fiber and the cotton fiber into a wrapped wire according to a preset ratio; Based on the wrapping yarn, the yarn core is coated to obtain elastic yarn; When it is preliminarily determined based on the ultimate elongation variation characteristic value that the preparation of the elastic yarn does not meet the preset standard, it is secondarily determined based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard, or the coating twist of the wrapped yarn is increased; When it is preliminarily determined based on the ultimate elongation variation characteristics that the preparation of the elastic yarn meets the preset standard, the elastic yarn that meets the preset standard is woven through a large circular loom to obtain an elastic fabric.

2. The method for producing a high elastic fabric according to claim 1, characterized in that: The process of preliminarily determining that the preparation of the elastic yarn does not meet the preset standard based on the ultimate elongation change characteristic value includes: Obtaining the ultimate elongation variation characteristic value; Comparing the limit elongation change characteristic value with a first preset elongation threshold and a second preset elongation threshold respectively; If the ultimate elongation variation characteristic value is greater than or equal to the first preset elongation threshold value and less than the second preset elongation threshold value, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and a secondary determination is made based on the hairiness variation characteristic value whether the preparation of the elastic yarn meets the preset standard; If the ultimate elongation variation characteristic value is greater than or equal to the second preset elongation threshold, it is preliminarily determined that the preparation of the elastic yarn does not meet the preset standard, and the wrapping twist of the wrapped yarn is increased according to the difference between the ultimate elongation variation characteristic value and the second preset elongation threshold.

3. The method for producing a high elastic fabric according to claim 2, characterized in that: The process of preliminarily determining that the preparation of the elastic yarn meets the preset standard based on the ultimate elongation change characteristic value includes: Obtaining the ultimate elongation variation characteristic value; comparing the ultimate elongation change characteristic value with the first preset elongation threshold; If the ultimate elongation change characteristic value is less than the first preset elongation threshold, it is determined that the preparation of the elastic yarn meets the preset standard, and the elastic yarn that meets the preset standard is woven through a large circular textile machine to obtain an elastic fabric.

4. The method for producing a high elastic fabric according to claim 3, characterized in that: The process of obtaining the ultimate elongation variation characteristic value includes: Obtaining an original diameter of the elastic yarn and recording it as a first diameter; Obtaining the breaking load of the elastic yarn; Cutting a preset length of elastic yarn and loading the elastic yarn with a force of 90% of the breaking load; After unloading, the yarn is allowed to stand still, and the diameter of the elastic yarn after the standing still is obtained and recorded as the second diameter; The difference between the first diameter and the second diameter is recorded as the ultimate elongation change characteristic value.

5. The method for producing a high elastic fabric according to claim 4, characterized in that: There are several twist increasing methods for increasing the covering twist, and each increasing method has a different increase range for the covering twist.

6. The method for producing a high elastic fabric according to claim 5, characterized in that: Under the first preset condition, several correction methods are set for correcting the covering twist, and each correction method has a different correction amplitude for the covering twist; the first preset condition is that the covering twist is increased and the breaking load of the elastic yarn after the adjusted covering twist is less than the preset breaking load.

7. The method for producing a high elastic fabric according to claim 6, characterized in that: A secondary determination is made as to whether the preparation of the elastic yarn meets a preset standard based on the hairiness change characteristic value, wherein: If the hairiness change characteristic value is less than a first preset hairiness threshold, it is determined that the preparation of the elastic yarn does not meet the preset standard and the preset traction multiple of the yarn core is reduced according to the difference between the first preset hairiness threshold and the hairiness change characteristic value; If the hairiness change characteristic value is greater than or equal to the first preset hairiness threshold and less than the second preset hairiness threshold, it is determined that the preparation of the elastic yarn meets the preset standard and the elastic yarn meeting the preset standard is woven through a large circular textile machine to obtain an elastic fabric; If the hairiness change characteristic value is greater than or equal to the second preset hairiness threshold, it is determined that the preparation of the elastic yarn does not meet the preset standard and the twisting angle of the wrapped yarn is reduced according to the difference between the hairiness change characteristic value and the second preset hairiness threshold.

8. The method for producing a high elastic fabric according to claim 7, characterized in that: The process of obtaining the hairiness change characteristic value comprises: Cutting a preset length of elastic yarn, obtaining the number of hairiness and the average length of hairiness of the elastic yarn and recording them as the first number of hairiness and the first average length of hairiness, respectively; Obtaining the breaking load of the elastic yarn; Applying a tensile force of 90% of the breaking load to the elastic yarn; After unloading, the yarn is allowed to stand still, and the number of hairiness and the average hairiness length of the elastic yarn after the standing still are obtained and recorded as the second number of hairiness and the second average hairiness length, respectively; A hairiness change characteristic value is obtained based on the first hairiness number, the first average hairiness length, the second hairiness number, and the second average hairiness length.

9. The method for producing a high elastic fabric according to claim 8, characterized in that: The reduction range of the preset traction multiple is positively correlated with the hairiness difference, wherein the hairiness difference is the difference between the first preset hairiness threshold and the hairiness change characteristic value.

10. The method for producing a high elastic fabric according to claim 9, characterized in that: There are several angle reduction methods for reducing the twisting angle, and each angle reduction method has a different reduction range for the twisting angle.

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