CN113737343A

CN113737343A - Preparation method of elastic yarn coated yarn

Info

Publication number: CN113737343A
Application number: CN202110868440.9A
Authority: CN
Inventors: 沈建炳
Original assignee: Zhejiang Longshida Technology Co ltd
Current assignee: Zhejiang Longshida Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-03
Anticipated expiration: 2041-07-30
Also published as: CN113737343B

Abstract

The invention provides a preparation method of elastic yarn coated yarn. The invention comprises the following steps: the elastic yarn is covered by the elastic yarn. The elastic yarn comprises an inner core yarn and a coating yarn. The inner core yarn comprises an elastic yarn, and the coating layer yarn comprises bamboo charcoal fiber, multifunctional fiber, wear-resistant fiber, antibacterial fiber and silver fiber; the coating layer yarns are alternately distributed and wound on the inner core yarns. The core yarn elastic yarn is of a double-layer structure, the nylon yarn and the polyacrylonitrile-based carbon fiber yarn completely wrap the elastic yarn, the elastic yarn can be fully protected, the corrosion of metabolites to the inner layer elastic yarn can be reduced while sufficient strength and elasticity are provided, the service life of the elastic yarn is prolonged, the high-temperature resistance degree of the double-layer fiber yarn is high, the flame retardant grade reaches V-1, and the damage of the elastic yarn in high temperature and open fire is reduced. Through the arrangement of the coating layer yarn, the elastic yarn has the advantages of antibiosis, flame retardance, deodorization, peculiar smell removal, static resistance and the like.

Description

Preparation method of elastic yarn coated yarn

Technical Field

The invention relates to a preparation method of yarn, belongs to the technical field of textile materials, and particularly relates to a preparation method of elastic yarn-coated yarn.

Background

The covered yarn is also called wrapping yarn, is a yarn with a novel structure, takes long filaments or short fibers as a yarn core, is wrapped with another yarn strip which is wrapped in a winding way in a certain way, and can also be long filaments or short fibers. The core yarn is wrapped by the outer wrapping yarn in a spiral manner. It features uniform yarn, bulkiness, smooth yarn, less filoplume, high strength and less broken ends. The covered yarn is generally used for spinning dress products which are in close contact with human bodies, such as ladies' underwear, maternity trousers, panty-hose, swimwear, tights and the like, and the basic requirements of the covered yarn are that the yarn is even, fluffy and full, high in strength, few in broken ends and the like.

The elastic yarn is very easy to see in daily life, is often used for elastic socks, gloves, wristbands, masks and hair ornaments, and the elastic yarn sold in the market at present is A-grade elastic yarn wrapped by double-strand fiber yarn (polyester yarn or nylon yarn). The polyester yarn or the nylon yarn has high elasticity and high strength, and the application range of the covering yarn can be widened by manufacturing the covering yarn taking the elastic yarn as the core yarn.

In the conventional research, for example, patent document CN211339813U discloses a multifunctional yarn, which includes an inner core layer, an intermediate layer coated on the inner core layer, and an outer skin layer coated on the intermediate layer, wherein a plurality of rayon filaments are arranged at the center of the inner core layer, and the rayon filaments are twisted with each other to improve the strength and toughness of the whole rayon filament; the outer side of the artificial silk is provided with a layer of elastic rubber band silk which wraps the artificial silk to prevent the artificial silk from being broken and disordered due to high strength, and the middle layer is provided with a plurality of fibers which are spirally wound on the elastic rubber band silk to prevent the elastic rubber band silk from being broken due to high strength; the cortex includes antibiotic fibre and wear-resisting fibre, and wear-resisting fibre and antibiotic fibre alternate distribution have effectually improved the life of yarn, and the protection is healthy for the person of dress. Further, as disclosed in patent document CN105133117B, a method for producing a high elasticity covered yarn is provided, in which fibers of different materials are combined together by providing a main rib and a wrapping portion: the PBT/PET composite filament is used as a main rib, the good durability, dimensional stability and better elasticity of the PBT fiber are utilized, and meanwhile, the cost of the fiber is reduced and the processing performance of the PBT is improved due to the addition of the PET; the polylactic acid is used as the coating layer, so that the good wearing comfort and touch feeling of the polylactic acid fiber and the antibacterial property of the polylactic acid fiber are exerted, and the addition of the additional antibacterial property is avoided; the strong interaction between silk fibroin and polylactic acid and the slight inhibition effect on the formation of the stereocomplex crystal are utilized, and the copolymer of the polylactic acid and the silk fibroin is used as a toughening modifier to relieve the brittleness increase of the polylactic acid caused by the formation of the stereocomplex crystal.

However, no published report has been found on the production of a covered yarn using an elastic yarn as a core yarn. In view of this, it is necessary to provide an elastic yarn covered yarn and a method for preparing the same.

Disclosure of Invention

The invention aims to provide a preparation method of elastic yarn coated yarn, and the prepared coated yarn has good elasticity and heat resistance.

In view of the above, the invention discloses a preparation method of an elastic yarn coated yarn, wherein the elastic yarn coated yarn comprises an inner core yarn and a coating yarn.

The inner core yarn comprises an elastic yarn, and the coating layer yarn comprises bamboo charcoal fiber, multifunctional fiber, wear-resistant fiber, antibacterial fiber and silver fiber;

the multifunctional fiber comprises honeycomb microporous structure photocatalyst fiber and cotton fiber;

the coating layer yarns are alternately distributed and wound on the inner core yarns.

On the basis of the scheme and as a preferred scheme of the scheme, the elastic yarn is high-elastic flame-retardant elastic yarn, and the specific manufacturing process is as follows:

s1, preparing raw materials: the rubber band yarn is core yarn, and the polyamide yarn and the polyacrylonitrile-based carbon fiber yarn are cladding yarn;

s2, soaking the polyacrylonitrile-based carbon fiber in a strong acid solution for acid etching, filtering, adding an ethanol solution with any ratio to deionized water for alcohol washing, and finally drying the polyacrylonitrile-based carbon fiber at 50 ℃;

s3, washing the nylon yarn with alcohol and drying;

s4, preparing a flame-retardant formula solution: uniformly stirring a proper amount of graphene oxide solution, 5-20 wt% of novel flame retardant ATZ and deionized water;

s5, respectively soaking the nylon yarns of S2 and S3 and the polyacrylonitrile-based carbon fiber yarns into the flame-retardant formula solution for 0.5-24h, and then drying, wherein the drying temperature is kept below 60 ℃;

and S6, blending the dried nylon yarn of S5 and polyacrylonitrile-based carbon fiber yarn, and covering the blended yarn on elastic yarn according to a traditional method to prepare the high-elastic flame-retardant elastic yarn.

Generally, polyacrylonitrile-based carbon fiber samples are provided with small molecular impurities such as spinning oil, additives, auxiliaries and the like, and polyacrylonitrile-based carbon fibers are low in surface energy and few in surface active groups and are not beneficial to stable attachment of flame retardants or other substances, so strong acid is adopted for etching to increase the surface activity of the polyacrylonitrile-based carbon fibers. The strong acid is preferably nitric acid.

On the basis of the above scheme and as a preferable scheme of the above scheme, the nylon yarn: the raw material weight ratio of the polyacrylonitrile-based carbon fiber is 60-85: 40-15.

On the basis of the scheme and as a preferable scheme of the scheme, the multifunctional fiber is formed by blending the honeycomb microporous structure photocatalyst fiber and the cotton fiber according to the blending ratio of 53-65: 47-35.

In addition to and as a preferred mode of the above mode, the flame retardant fibers are filled in the gaps of the covering yarn.

The invention has the beneficial effects that:

compared with the prior art, the core yarn elastic yarn has a double-layer structure, the nylon yarn and the polyacrylonitrile-based carbon fiber yarn completely wrap the elastic yarn, the elastic yarn can be fully protected, the corrosion of metabolites to the inner layer elastic yarn can be reduced while sufficient strength and elasticity are provided, the service life of the elastic yarn is prolonged, the high-temperature resistance degree of the double-layer fiber yarn is high, the flame-retardant grade reaches V-1, and the damage of the elastic yarn in high temperature and open fire is reduced. Through the arrangement of the coating layer yarn, the elastic yarn has the advantages of antibiosis, flame retardance, deodorization, peculiar smell removal, static resistance and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a synthesis process diagram of the novel flame retardant ATZ of the present invention.

In the figure, 1-elastic thread; 2-bamboo charcoal fiber; 3-multifunctional fibers; 4-abrasion resistant fibers; 5-antibacterial fibers; 6-silver fiber.

Detailed Description

The present invention will be further described with reference to specific examples, which are intended to clearly and completely describe the technical solutions in the examples of the present invention, and it should be understood that the described examples are only a part of the examples of the present invention, and not all of the examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-2, a method for preparing an elastic yarn, the elastic yarn comprises an inner core yarn and a coating yarn; the inner core yarn comprises an elastic yarn 1, and the coating layer yarn comprises bamboo charcoal fibers 2, multifunctional fibers 3, wear-resistant fibers 4, antibacterial fibers 5 and silver fibers 6; the multifunctional fiber 3 comprises honeycomb microporous structure photocatalyst fiber and cotton fiber; the coating layer yarns are alternately distributed and wound on the inner core yarns.

In the invention, the elastic yarn 1 is a high-elastic flame-retardant elastic yarn, and the specific manufacturing process is as follows:

s3, washing the nylon yarn with alcohol and drying;

Generally, the polyacrylonitrile-based carbon fiber sample contains small molecular impurities such as spinning oil, additives, auxiliaries and the like, and the polyacrylonitrile-based carbon fiber has low surface energy and few surface active groups, and is not beneficial to stable adhesion of a flame retardant or other substances, so strong acid is adopted for etching to increase the surface activity of the polyacrylonitrile-based carbon fiber. In the present invention, the strong acid is preferably nitric acid.

The preparation method of the novel flame retardant ATZ shown in figure 2 comprises the following steps: a100 mL three-necked flask was charged with 5-aminotetrazole monohydrate (4.12g, 40mmol), 3,4, 5-trihydroxybenzaldehyde (4.88g, 40mmol) and absolute ethanol (60mL), stirred at 85 ℃ for 4h, and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (8.64g, 40mmol) was added thereto and stirred at 85 ℃ for 18 h. The reaction mixture was slowly cooled to room temperature, filtered, washed with ethanol, and dried in a vacuum oven at 70 ℃ for 24h to afford 6- { [ (1 hydro-tetrazol-5-yl) amino ] [4- (3,4,5) trihydroxyphenyl ] methyl } dibenzo [ c, e ] [1,2] phosphine-6-oxide (novel ATZ).

Through the flame-retardant formula that graphene oxide solution and novel fire retardant ATZ made up, fire-retardant material ATZ can be stable attached to polyacrylonitrile base carbon fiber silk on, its theory of operation is: the graphene oxide can be stably attached to the acid-etched polyacrylonitrile-based carbon fiber by virtue of the unique wrinkle appearance and functional groups of the graphene oxide, so that the graphene oxide has a large specific surface and chemical activity; meanwhile, the graphene oxide contains rich oxygen-containing functional groups, such as carboxyl, hydroxyl, epoxy group and the like, and forms hydrogen bonds with hydroxyl on the novel flame retardant ATZ, so that the attachment possibility of the graphene oxide is increased; the graphene oxide plays a role of a connecting bridge, so that the novel flame retardant substance ATZ can be stably attached to the polyacrylonitrile-based carbon fiber. Meanwhile, the use of the graphene oxide is beneficial to blending of the polyamide yarns and the polyacrylonitrile-based carbon fiber yarns, so that the blending effect is good.

In the invention, the nylon yarn: the raw material weight ratio of the polyacrylonitrile-based carbon fiber is 60-85: 40-15.

In the invention, the multifunctional fiber 3 is formed by blending the honeycomb microporous structure photocatalyst fiber and the cotton fiber according to the blending ratio of 53-65: 47-35. The honeycomb microporous structure photocatalyst fiber is prepared by perfectly combining nano titanium dioxide and a high polymer material by adopting a modern composite technology and then performing melt spinning on the combined nano titanium dioxide and a poly-cool modified slice with a honeycomb microporous structure trend. The nanometer titania is perfectly placed in the fiber and is superfine and uniformly distributed, so that the application of the photocatalyst technology in the fields of fiber and textile is really realized, and the fiber not only has the general characteristics of moisture absorption, quick drying and the like of the honeycomb microporous structure fiber, but also has the special function that the honeycomb photocatalyst fiber can absorb harmful gases such as benzene, xylene, ammonia, formaldehyde, smoke odor and the like under the action of sunlight, sunlight and visible light and automatically decompose into carbon dioxide and water. Experiments show that the photocatalyst has stronger oxidizing capability than ozone and negative oxygen ions, and can powerfully decompose an odor source. Therefore, the textile of the fiber can also play a role in sterilizing, deodorizing and preventing mildew on the surface of air or objects in an area under the action of sunlight and sunlight. Can effectively remove various bacteria such as Escherichia coli, Staphylococcus aureus, and pyogenic bacteria, and inhibit the transmission of some pathogens. Due to the super-hydrophilic characteristic of the photocatalyst, dirt is not easy to adhere to the photocatalyst, and the fabric can be kept clean for a long time. Furthermore, the gaps of the coating yarn are filled with flame-retardant fibers.

Comparative example

The procedure of the present invention is similar to that of the above-described embodiment except that the high elastic flame-retardant elastic yarn is removed and a general elastic yarn (an elastic yarn having a commercial value of 2145 from the Rean City Qing ribbon manufacturer) is used.

Control group

The control group was an elastic thread with a goods number of 2145 from the Rean City Qing Braille works.

The elastic yarn coated by the elastic yarn with the same diameter as that of the embodiment and the comparative example is randomly selected to be 10m respectively, the fiber breaking strength of the samples is detected according to the biological polishing treatment of the cotton knitted fabric, escherichia coli is inoculated on each group of samples, after the samples are cultured for 24 hours, the bacteriostasis rate of the samples is detected, the elongation of the elastic yarn in the elastic deformation of each group of samples is detected, the test is repeated for 3 times, the results are averaged, and the service performance of the elastic yarn coated by the embodiment and the comparative example is shown in the table 1.

TABLE 1 performance properties of the example and comparative example elastic yarn covered yarns

The results in table 1 show that the elastic yarn coated yarns of the examples have higher breaking strength and bacteriostasis rate than the comparative examples, and have higher elongation, flame retardant levels and the like, which shows that the elastic yarn coated yarns provided by the invention have good service performance.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The preparation method of the elastic yarn coated yarn comprises an inner core yarn and a coating layer yarn, and is characterized in that:

the inner core yarn comprises an elastic yarn (1), and the coating layer yarn comprises bamboo charcoal fibers (2), multifunctional fibers (3), wear-resistant fibers (4), antibacterial fibers (5) and silver fibers (6);

the multifunctional fiber (3) comprises honeycomb microporous structure photocatalyst fiber and cotton fiber;

2. The preparation method of the elastic yarn covered with the elastic yarn according to claim 1, wherein the elastic yarn (1) is a high-elastic flame-retardant elastic yarn, and the specific preparation process is as follows:

s3, washing the nylon yarn with alcohol and drying;

3. The method for preparing the elastic yarn covered by the yarn as claimed in claim 2, wherein the nylon yarn: the raw material weight ratio of the polyacrylonitrile-based carbon fiber is 60-85: 40-15.

4. The preparation method of the elastic yarn covered yarn according to claim 1, wherein the multifunctional fiber (3) is formed by blending honeycomb microporous structure photocatalyst fiber and cotton fiber according to a blending ratio of 53-65: 47-35.

5. The method of claim 1, wherein the interstices of the yarn are filled with flame retardant fibers.