CN112481763B

CN112481763B - Novel elastic yarn and manufacturing method thereof and fabric

Info

Publication number: CN112481763B
Application number: CN202011269498.3A
Authority: CN
Inventors: 王宗文; 王美秀; 卢姣艳; 柯文博
Original assignee: Advance Denim Co ltd
Current assignee: Advance Denim Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2022-08-12
Anticipated expiration: 2040-11-13
Also published as: CN112481763A

Abstract

The application provides a novel elastic yarn, a manufacturing method thereof and a fabric, wherein the core yarn comprises at least one elastic filament; the outer covering yarn comprises a first yarn and a second yarn, and the first yarn and the second yarn are crossly wound and cover the outer surface of the core yarn; the twist multiplier range of the first yarn is 4.1-5.5, and the twist multiplier range of the second yarn is 3.0-4.0. This application adopts the outsourcing yarn cladding that is twined mutually by the short-staple cross of two kinds of different twists and forms on elastic core yarn, and one of them short-staple is high twist, and another kind of short-staple is twist commonly used, and the short-staple of two kinds of different twists is synthesized each other for elastic core yarn receives the pressure of outsourcing yarn moderate, and then makes the surface fabric that the elastic yarn who utilizes this application weavingd and form both have good resilience performance, can effectively control the shrinkage of fabric again.

Description

Novel elastic yarn and manufacturing method thereof and fabric

Technical Field

The application relates to the field of garment materials, in particular to novel elastic yarn and a manufacturing method and a material thereof.

Background

The jeans wear is evergreen trees in the wear, is still erected on the stage of fashion wear after one hundred years of development, and has antique jeans styles, twill styles and the like which are important elements for forming the jeans wear, and is popular among people, particularly teenagers. Among them, the elastic jeans wear is widely popular because of its more prominent and beautiful shape, comfort and natural wearing, and free movement.

The existing elastic jean fabric is generally woven by adopting elastic core-spun yarns, so that the fabric has excellent elastic performance, and the core-spun yarns are generally formed by covering short fibers on the outer layer and elastic filaments on the inner layer. In the actual production process, when the outer layer short fiber is adopted with normal twist, although the fabric made of the covering yarn has excellent elastic performance, the shrinkage rate of the fabric is difficult to control; when the outer layer short fibers are high in twist, the outer layer short fibers are tightly held due to internal and external transfer, free movement among the fibers is blocked, the pressure of the outer layer short fibers on the elastic filaments in the inner layer is overlarge, when the fabric is stretched to recover, the elastic filaments are blocked from recovering due to the overlarge pressure of the short fibers, the recovery performance of the fabric can be weakened, the fabric is enabled to be arched, meanwhile, the fabric made of the yarns with high twist is uncomfortable in hand feeling, particularly, the side contacting with the skin can cause skin itching, and the comfortable effect of the clothes can not be achieved.

There is therefore a need for improvement in the art.

Disclosure of Invention

The application aims to provide a novel elastic yarn, a manufacturing method thereof and a fabric, and can solve the problems that the existing elastic yarn cannot effectively control the shrinkage rate of the fabric and ensure that the fabric has good recovery performance, and the elasticity and the comfort degree of the fabric can be enhanced.

The embodiment of the application provides a novel elastic yarn, its characterized in that includes:

a core yarn comprising at least one elastic filament;

the outer covering yarn comprises a first yarn and a second yarn, and the first yarn and the second yarn are crossly wound and cover the outer surface of the core yarn; the twist multiplier range of the first yarns is 4.1-5.5, and the twist multiplier range of the second yarns is 3.0-4.0.

Preferably, in the novel elastic yarn according to the embodiment of the present application, the twisting directions of the first yarn and the second yarn are opposite.

Preferably, in the novel elastic yarn according to the embodiment of the application, 1% -5% of fibers a are uniformly arranged in the first yarn and the second yarn respectively, and the fibers a are fibers which can be melted under the treatment of a preset temperature.

Preferably, in the novel elastic yarn of the embodiment of the present application, the diameter of the a fiber is in a range of 100 nanometers to 50 micrometers.

Preferably, in the novel elastic yarn according to the embodiment of the present application, the elastic yarn further includes:

the intermediate yarn is a chemical fiber filament and is arranged between the outer surface of the core yarn and the inner surface of the covering yarn.

Preferably, in the novel elastic yarn of the embodiment of the application, the elastic filament is a polyurethane fiber, a bicomponent filament or a rubber filament, and the denier number of the elastic filament is 20D-300D; the chemical fiber filament is polyester fiber, polyamide fiber, polyolefin alcohol fiber or polyacrylonitrile fiber, and the denier number of the chemical fiber filament is 40D-450D; the first yarn and the second yarn are woven by one or more of cotton fiber, hemp, wool, tencel, modal, viscose, polyester or nylon, and the yarn counts of the first yarn and the second yarn are both 16S-60S.

The application also provides a novel elastic yarn manufacturing method, which is used for manufacturing the novel elastic yarn and comprises the following steps:

A. making a core yarn comprising at least one elastic filament;

B. selecting first yarns and second yarns with different twists as wrapping yarns, wherein the twist coefficient range of the first yarns is 4.1-5.5, and the twist coefficient range of the second yarns is 3.0-4.0;

C. and D, doubling the outer covering yarn in the step B and the core yarn in the step A, so that the first yarn and the second yarn are crossly entangled and cover the outer surface of the core yarn to obtain the elastic yarn.

Preferably, in the method for manufacturing the novel elastic yarn according to the embodiment of the present application,

in the step B, 1% -5% of fibers A are uniformly arranged in the first yarn and the second yarn respectively, and the fibers A are fibers which can be melted under the treatment of a preset temperature;

after the step C, the following steps are also included: and C, treating the elastic yarn obtained in the step C or the fabric containing the elastic yarn obtained in the step C at the preset temperature so that the A fiber is molten.

after the step C, the following steps are also included: and D, elastically placing the elastic yarn obtained in the step C on a two-for-one twister for twisting, wherein the twisting direction of twisting is the same as that of the first yarn, and the twisting coefficient of twisting is 300-400 twisting/m.

The embodiment of the application also provides a novel elastic fabric, and the novel elastic yarn is woven to form the novel elastic fabric.

Has the advantages that: the novel elastic yarn of this application embodiment adopts the outsourcing yarn cladding that is twined mutually by the short-staple cross of two kinds of different twists and forms on elastic core yarn, and one of them short-staple is high twist, and another kind of short-staple is twist commonly used, and the short-staple of two kinds of different twists is synthesized each other for elastic core yarn receives the pressure of outsourcing yarn moderate, and then makes the surface fabric that the elastic yarn who utilizes this application weavingd and form both have good resilience performance, can effectively control the shrinkage of fabric again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a novel elastic yarn according to an embodiment of the present application.

Fig. 2 is a product structure view of a novel elastic yarn according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, it should be noted that the terms "outer surface", "between", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a novel elastic yarn according to some embodiments of the present disclosure, and fig. 2 is a product structural diagram (i.e., a product photo) of the novel elastic yarn according to the embodiments of the present disclosure. As shown in fig. 1 and 2, the novel elastic yarn comprises:

a core yarn 10, the core yarn 10 comprising at least one elastic filament;

an outer covering yarn comprising a first yarn 31 and a second yarn 32, the first yarn 31 and the second yarn 32 being crossingly entangled and covering the outer surface of the core yarn 10; the twist multiplier range of the first yarn 31 is 4.1-5.5, and the twist multiplier range of the second yarn 32 is 3.0-4.0.

The elastic filaments in the core yarn 10 may be a plurality of filaments, and the plurality of elastic filaments may be formed into the core yarn 10 by a doubling process.

Preferably, the novel elastic yarn of the core yarn according to the embodiment of the present invention further includes an intermediate yarn, which is a chemical fiber filament, and is disposed between the outer surface of the core yarn 10 and the inner surface of the covering yarn, and can cover and fix the core yarn 10 of at least one elastic filament. The chemical fiber filament can be polyester fiber, polyamide fiber, polyolefin alcohol fiber or polyacrylonitrile fiber, and the denier number of the chemical fiber filament is 40D-450D. Because elastic filament is the cladding of chemical fibre filament, first yarn 31 and second yarn 32 are not direct contact to elastic filament, when the yarn was replied by tensile, the chemical fibre filament can cushion first yarn 31 and second yarn 32 to elastic filament's pressure, simultaneously because first yarn 31 and second yarn 32 are not direct contact to elastic filament, elastic filament is good at tensile back resilience in the yarn, it is little to receive other fibre obstacles, therefore damage to elastic filament is little, consequently, the elastic recovery rate that adopts the surface fabric that this application embodiment yarn weaved is good.

It should be noted that, in the novel elastic yarn of the embodiment of the present application, the first yarn 31 is of a high twist, the second yarn 32 is of a common twist, and the two different twists of the staple fibers are interlaced and wrapped on the elastic filament, and are uniformly arranged, so that the elastic filament is moderately pressed by the outer covering yarn, and further, the fabric woven by using the elastic yarn of the embodiment of the present application has excellent recovery performance, and can effectively control the shrinkage of the fabric. In addition, in the novel elastic yarn of the embodiment of the application, the twisting directions of the first yarn 31 and the second yarn 32 are opposite, so that the first yarn 31 and the second yarn 32 can be tightly cohered with each other, two types of short fibers are interlaced and uniformly wrapped on the core yarn 10, and elastic filaments in the inner layer can be uniformly and well wrapped, thereby solving the problem that in the traditional double-core-wrapped yarn, short fibers in the outer layer cannot uniformly wrap the elastic filaments in the inner layer, so that the elastic filaments are likely to be exposed, and therefore, in weaving and subsequent processing procedures, fabric elastic damage can be caused, and particularly, the manufactured garment is likely to lose elasticity during washing.

In practical applications, the first yarns 31 may preferably have a common S-twist direction, while the second yarns 32 have a Z-twist direction.

In practical application, the elastic filament may be a polyurethane fiber, a bicomponent filament or a rubber filament, the denier of the elastic filament is 20D-300D, the first yarn 31 and the second yarn 32 are natural fibers or chemical fibers, such as yarns woven from one or more of cotton fibers, hemp, wool, tencel, modal, viscose, polyester or nylon, and the yarn count of the elastic filament is 16S-60S.

In addition, in the novel elastic yarn of this application embodiment, evenly be provided with 1% ~5% A fibre in first yarn 31 and the second yarn 32 respectively, this A fibre is the fibre that can melt under the temperature treatment of predetermineeing. In practical application, the fibers with different melting point temperatures can be selected according to practical situations, for example, the a fiber can be conventional polyester or soluble polyester material on the market.

Preferably, the a fiber of the present embodiment is a fiber formed by an electrospinning process using a polyurethane carrier as a spinning solution, i.e., a polyurethane electrospun fiber. The polyurethane electrostatic spinning fiber can be melted at the temperature of 140-180 ℃, and the diameter of the polyurethane electrostatic spinning fiber is dozens of nanometers to several micrometers due to the fact that the polyurethane electrostatic spinning fiber is formed through an electrostatic spinning process, and specifically the diameter range of the A fiber is 100 nanometers-50 micrometers. Because the diameter of the polyurethane electrostatic spinning fiber is small, the weight of the fiber is light, a certain amount of polyurethane electrostatic spinning fiber is added into the yarn, the volume occupied by the fiber is small, the influence on the structure and the hand feeling of the spun yarn after melting is small, meanwhile, the polyurethane electrostatic spinning fiber can be uniformly distributed in the yarn, and after the treatment at the temperature of 140-180 ℃, other short fibers can be directly bonded together, so that the strength of the yarn can be improved. Meanwhile, because the diameter of the polyurethane electrostatic spinning fiber is small, the structure of the fiber in the yarn cannot be changed when the bonding occurs, compared with the conventional soluble fiber (such as a soluble polyester material), because the weight of the conventional soluble fiber is heavier, the soluble fiber is added into the yarn, and after the soluble fiber is dissolved under the temperature treatment, a microporous structure and the like can be generated in the prepared yarn, although the weight of the yarn can be reduced, the hand feeling of the yarn is fluffy, the strength of the yarn can be seriously influenced, so that the breaking strength of the prepared fabric can not reach the standard of fabric wearing, and the light weight and high strength performance of the fabric can not be considered at the same time. Therefore, the effect of the polyurethane electrostatic spinning fiber in the embodiment of the application is far better than that of the conventional soluble fiber. The embodiment of the present application further provides a method for manufacturing the novel elastic yarn, which is used for manufacturing the novel elastic yarn, and includes the following steps:

A. making a core yarn comprising at least one elastic filament;

C. and D, doubling the covering yarn in the step B and the core yarn in the step A, so that the first yarn and the second yarn are crossly entangled and cover the outer surface of the core yarn to obtain the elastic yarn.

It should be noted that, the following steps are also included between step a and step B: and the chemical fiber filaments are adopted to coat the elastic filaments, so that the outer surfaces of the elastic filaments are coated by the chemical fiber filaments. In practical applications, the coating method may be air bag (air coating), machine bag (machine coating), and the like, and the coating method of the chemical fiber filaments is not limited herein.

Preferably, in the method for manufacturing the novel elastic yarn according to the embodiment of the present application, in step B, 1% to 5% of a fibers are uniformly disposed in the first yarn 31 and the second yarn 32, respectively, and the a fibers are fibers that can be melted at a predetermined temperature. Therefore, after step C, the elastic yarn obtained in step C is subjected to a temperature treatment so that the a fiber is melted. The fiber A in the embodiment of the application is formed by an electrostatic spinning process with a polyurethane carrier as a spinning solution, namely a polyurethane electrostatic spinning fiber. The temperature treatment conditions for the polyurethane electrospun fibers were therefore: the temperature is 140-180 ℃; the time is 1-5 min. In practical applications, the fabric made of the elastic yarn of the embodiment of the present application may be subjected to the above-mentioned temperature treatment in the finishing process. In the spinning process of the first yarn 31 and the second yarn 32, the A fibers subjected to temperature treatment are uniformly distributed in the first yarn 31 and the second yarn 32, and when the A fibers are melted after the temperature treatment, the A fibers can be bonded with each other after the A fibers are melted, so that the fibers are not relatively transferred, the strength of the yarn is enhanced, the tearing strength of the fabric can be enhanced, the water shrinkage of the fabric can be further effectively reduced, the breadth of the manufactured fabric is wide, and the phenomenon that the manufactured clothes are shrapnel at a sewing position is reduced.

In addition, in the manufacturing method of the novel elastic yarn according to the embodiment of the present application, after step C, the method further includes the steps of: and (3) elastically placing the elastic yarn obtained in the step (C) on a two-for-one twister for twisting, wherein the twisting direction of twisting is the same as that of the first yarn (31), namely the twisting direction can be the common S twisting, and the twisting coefficient of twisting is 300-400 twisting/m. Because the first yarn 31 with high twist is S twist, the second yarn 32 with low twist is Z twist, and when twisting on the two-for-one twister, the twist direction of the whole twisting of the yarn is S twist, so that the second yarn 32 with low twist can be untwisted to a certain extent, and the first yarn 31 with high twist can be further twisted, therefore, in the elastic yarn of the embodiment of the application, the occupied volume of the second yarn 32 with low twist in the yarn is high, so that the yarn with low twist is in more contact with the skin, a comfortable effect can be embodied, meanwhile, the first yarn 31 with high twist can provide the functions of supporting and strengthening, and the soft, comfortable and retro effect of the fabric is realized.

The novel elastic yarn provided by the embodiment of the application is coated on the elastic core yarn by adopting the outer covering yarn formed by interlacing and winding two short fibers with different twists, wherein one short fiber is high in twist, the other short fiber is common in twist, and the two short fibers with different twists are mutually integrated, so that the elastic core yarn is moderate in pressure of the outer covering yarn, and further a fabric woven by the elastic yarn has excellent recovery performance and can effectively control the shrinkage rate of a fabric; the twisting directions of the two short fibers are set to be opposite, so that the two short fibers can be mutually embraced and closely arranged on the outer surface of the core yarn, the outer covering yarn can be better covered on the core yarn, the phenomenon that the elastic filament of the core yarn is exposed is avoided, the recovery performance of the fabric is ensured, and the elastic filament is prevented from losing elasticity; the A fibers which can be melted through temperature treatment are uniformly arranged in the two types of short fibers, when the fibers are melted through temperature, the fibers can be bonded with each other, the friction force between the fibers is enhanced, the fibers are not relatively transferred, the strength of the yarn is enhanced, the tearing strength of the fabric can be enhanced, and the shrinkage rate of the fabric can be further effectively reduced; and wrap up yarn and core yarn with middle yarn chemical fibre filament cladding between, two kinds of short fibers are not direct contact to elastic filament, and when the yarn was replied by tensile, the chemical fibre filament can cushion two kinds of short fibers to elastic filament's pressure for elastic filament is good at tensile back resilience in the yarn, receives other fibre to hinder for a short time, therefore is little to elastic filament's damage, consequently adopts the elasticity recovery rate of the surface fabric that this application embodiment yarn weaved to be good.

The present application is further illustrated by the following specific examples.

Example 1

First, a core yarn was made, which was composed of one elastic filament, which was a polyurethane fiber (i.e., spandex) having a denier of 70D. Then, a first yarn and a second yarn with different twists and opposite twisting directions are selected as wrapping yarns, wherein the twisting coefficient range of the first yarn is 4.5, the twisting coefficient range of the second yarn is 3.5, the twisting direction of the first yarn is common S twisting, the twisting direction of the second yarn is Z twisting, the first yarn and the second yarn are pure cotton yarns, the yarn number of the first yarn and the second yarn is 32S, and in addition, 3% of polyurethane electrostatic spinning fibers are uniformly arranged in the first yarn and the second yarn respectively. Next, the first yarn and the second yarn of the pure cotton yarn and the core yarn of spandex were subjected to a doubling treatment so that the first yarn and the second yarn were crossingly entangled and coated on the outer surface of the core yarn to obtain an elastic yarn, which was designated as yarn B1. Then, this yarn B1 was twisted by placing it on a two-for-one twister in the same direction as the first yarn, i.e., S twist, with a twist factor of 350 twists/m.

The elastic fabric was obtained by weaving using yarn B1 as weft and 10S pure cotton as warp, and this elastic fabric was designated as fabric 1. Carrying out temperature treatment on the fabric 1 in a post-finishing processing procedure, wherein the temperature treatment conditions are as follows: the temperature is 140-180 ℃; the time is 3min, and the polyurethane electrostatic spinning fibers are melted so that the fibers are bonded with each other.

Example 2

First, a core yarn was made, which was composed of one elastic filament, which was a polyurethane fiber (i.e., spandex) having a denier of 70D. And then, carrying out air coating treatment on the elastic filament by using a chemical fiber filament of the polyester fiber, so that the outer surface of the elastic filament is coated by the chemical fiber filament, and the denier of the chemical fiber filament of the polyester fiber is 75D. And then, selecting a first yarn and a second yarn with different twists and opposite twisting directions as wrapping yarns, wherein the twisting coefficient range of the first yarn is 4.5, the twisting coefficient range of the second yarn is 3.5, the twisting direction of the first yarn is common S twisting, the twisting direction of the second yarn is Z twisting, the first yarn and the second yarn are pure cotton yarns, the yarn number of the first yarn and the second yarn is 32S, and in addition, 3% of polyurethane electrostatic spinning fibers are uniformly arranged in the first yarn and the second yarn respectively. Then, the first yarn and the second yarn of the pure cotton yarn and the core yarn coated with the chemical fiber filaments are subjected to doubling treatment, so that the first yarn and the second yarn are crossly entangled and coated on the outer surface of the core yarn to obtain an elastic yarn, and the elastic yarn is marked as yarn B2. Then, this yarn B2 was twisted by placing it on a two-for-one twister in the same direction as the first yarn, i.e., S twist, with a twist factor of 350 twists/m.

The elastic fabric was obtained by weaving using yarn B2 as weft and 10S pure cotton as warp, and this elastic fabric was designated as fabric 2. And (3) carrying out temperature treatment on the fabric 2 in a post-finishing processing procedure, wherein the temperature treatment conditions are as follows: the temperature is 140-180 ℃; the time is 3min, and the polyurethane electrostatic spinning fibers are melted to bond the fibers with each other.

Example 3

First, a core yarn was made, which was composed of one elastic filament, which was a polyurethane fiber (i.e., spandex) having a denier of 70D. Then, a first yarn and a second yarn with different twists and opposite twisting directions are selected as wrapping yarns, wherein the twisting coefficient range of the first yarn is 4.5, the twisting coefficient range of the second yarn is 3.5, the twisting direction of the first yarn is common S twisting, the twisting direction of the second yarn is Z twisting, the first yarn and the second yarn are both pure cotton or tencel yarns, the yarn count of the first yarn and the second yarn is 24S, and in addition, 3% of polyurethane electrostatic spinning fibers are uniformly arranged in the first yarn and the second yarn respectively. Next, the first yarn and the second yarn of the pure cotton or the tencel yarn and the core yarn of spandex are subjected to a doubling treatment so that the first yarn and the second yarn are crossly entangled and coated on the outer surface of the core yarn to obtain an elastic yarn, which is designated as yarn B3. Then, this yarn B3 was twisted by placing it on a two-for-one twister in the same direction as the first yarn, i.e., S twist, with a twist factor of 350 twists/m.

The elastic fabric was obtained by weaving using yarn B3 as weft and 14S pure cotton as warp, and this elastic fabric was designated as fabric 3. And (3) carrying out temperature treatment on the fabric 3 in a post-finishing processing procedure, wherein the temperature treatment conditions are as follows: the temperature is 140-180 ℃; the time is 3min, and the polyurethane electrostatic spinning fibers are melted to bond the fibers with each other.

Example 4

First, a core yarn was made, which was composed of one elastic filament, which was a polyurethane fiber (i.e., spandex) having a denier of 70D. And then, carrying out air coating treatment on the elastic filament by using a chemical fiber filament of the polyester fiber, so that the outer surface of the elastic filament is coated by the chemical fiber filament, and the denier of the chemical fiber filament of the polyester fiber is 75D. And then, selecting a first yarn and a second yarn with different twists and opposite twisting directions as wrapping yarns, wherein the twisting coefficient range of the first yarn is 4.5, the twisting coefficient range of the second yarn is 3.5, the twisting direction of the first yarn is a common S twist, the twisting direction of the second yarn is a Z twist, the first yarn and the second yarn are both pure cotton or tencel yarns, the yarn count of the first yarn and the second yarn is 24S, and in addition, 3% of polyurethane electrostatic spinning fibers are uniformly arranged in the first yarn and the second yarn respectively. Next, the first yarn and the second yarn of the pure cotton or the tencel yarn and the core yarn coated with the chemical fiber filaments are subjected to a doubling treatment so that the first yarn and the second yarn are crossly entangled and coated on the outer surface of the core yarn, thereby obtaining an elastic yarn, and the elastic yarn is designated as yarn B4. Then, this yarn B4 was twisted by placing it on a two-for-one twister in the same direction as the first yarn, i.e., S twist, with a twist factor of 350 twists/m.

The elastic fabric was obtained by weaving using yarn B4 as weft and 14S pure cotton as warp, and this elastic fabric was designated as fabric 4. And (3) carrying out temperature treatment on the fabric 4 in a post-finishing processing procedure, wherein the temperature treatment conditions are as follows: the temperature is 140-180 ℃; the time is 3min, and the polyurethane electrostatic spinning fibers are melted to bond the fibers with each other.

The prepared fabrics 1, 2, 3 and 4 are used for performance detection. Two groups of contrast fabrics are set and marked as a contrast fabric 1 and a contrast fabric 2, the contrast fabric 1 is used as a contrast group of the fabrics 1 and 2, and the contrast fabric 2 is used as a contrast group of the fabrics 3 and 4. Specifically, the contrast fabric 1 is woven by using 10S pure cotton yarn as warp yarn and conventional double-core-spun yarn as weft yarn, wherein the core yarn of the double-core-spun yarn is 70D spandex, and the spandex is coated by 75D polyester fiber chemical fiber filament and then coated by 16S short fiber; the contrast fabric 2 was woven with 14S pure cotton yarn as warp yarn and conventional double-core yarn as weft yarn, the core yarn of the double-core yarn was 70D spandex covered with 75D polyester staple fiber filament and then covered with a 12S staple fiber. The detection results are as follows:

fabric to be detected	Breadth (inch)	Shrinkage in weft	Weft tearing strength (N)	Elastic elongation (%)	Growth rate (%)	Elastic recovery (%)
							Fabric 1	55	-7	38	43	7	88
Fabric 2	56	-5	43	38	2	94.6
							Comparison fabric 1	48	-12	36	36	8	90.3
Fabric 2	55.6	-8	46	48.2	7.6	82.3
							Fabric 3	57.2	-6	53.4	44.5	2.5	93.4.
Comparison fabric 2	48.3	-14	41.8	39.1	8	90.3

According to the performance detection, compared with the comparison fabric 1 woven by the conventional double-core-spun yarn, the fabric 1 and the fabric 2 woven by the elastic yarn have excellent recovery performance, can effectively control the shrinkage of the fabric, and are not easy to deform and better in tearing strength. Compared with the contrast fabric 2 woven by the conventional double-core-spun yarn, the fabric 3 and the fabric 4 woven by the elastic yarn in the embodiment of the application have excellent recovery performance, can effectively control the shrinkage rate of the fabric, are not easy to deform, and have better tearing strength.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A novel elastic yarn, comprising:

a core yarn comprising at least one elastic filament;

the outer covering yarn comprises a first yarn and a second yarn, and the first yarn and the second yarn are crossly wound and cover the outer surface of the core yarn; the twist factor range of the first yarns is 4.1-5.5, and the twist factor range of the second yarns is 3.0-4.0;

the elastic yarn further comprises:

the middle yarn is a chemical fiber filament and is arranged between the outer surface of the core yarn and the inner surface of the outer covering yarn through air covering.

2. The novel elastic yarn according to claim 1, characterized in that the twisting directions of said first yarn and said second yarn are opposite.

3. The novel elastic yarn according to claim 1, wherein 1% -5% of fibers A are uniformly arranged in the first yarn and the second yarn respectively, and the fibers A are fibers which can be melted under a preset temperature treatment.

4. The novel elastic yarn according to claim 3, wherein said A fibers have a diameter ranging from 100 nm to 50 μm.

5. The novel elastic yarn according to claim 1, wherein the elastic filament is a polyurethane fiber, a bicomponent filament or a rubber filament, and has a denier of 20D to 300D; the chemical fiber filament is polyester fiber, polyamide fiber, polyolefin alcohol fiber or polyacrylonitrile fiber, and the denier number of the chemical fiber filament is 40D-450D; the first yarn and the second yarn are both formed by spinning one or more of cotton fiber, hemp, wool, tencel, modal, viscose, polyester or nylon, and the yarn counts of the first yarn and the second yarn are both 16S-60S.

6. A method for manufacturing a novel elastic yarn, characterized in that it is used for manufacturing a novel elastic yarn according to any one of claims 1 to 5, comprising the following steps:

A. making a core yarn comprising at least one elastic filament;

C. performing doubling treatment on the outer covering yarn in the step B and the core yarn in the step A, so that the first yarn and the second yarn are crossly entangled and cover the outer surface of the core yarn to obtain an elastic yarn;

the method also comprises the following steps between the step A and the step B: and carrying out air coating treatment on the elastic filament by using the chemical fiber filament, so that the outer surface of the elastic filament is coated by the chemical fiber filament.

7. The novel process for producing an elastic yarn according to claim 6,

after the step C, the following steps are also included: and D, treating the elastic yarn obtained in the step C or the fabric containing the elastic yarn obtained in the step C at the preset temperature so that the A fiber is molten.

8. The novel process for producing an elastic yarn according to claim 6,

9. A novel elastic fabric, which is characterized in that the novel elastic yarn is woven according to any one of claims 1 to 5.