CN114059210A - High-hygroscopicity yarn and preparation method thereof - Google Patents

Abstract

The invention discloses a high-hygroscopicity yarn and a preparation method thereof, the high-hygroscopicity yarn is provided with a core wire, a core-spun layer and a surface layer, wherein the core wire is made by spirally twisting regenerated soy protein fibers, water-soluble vinylon short fibers and high-hygroscopicity fibers, the core-spun layer is formed by twisting and molding a high-tenacity fiber yarn on the outer surface of the core wire, and the surface layer is formed by twisting and molding skin-friendly fibers on the outer surface of the core-spun layer; when the anti-bacterial yarn is prepared, the soybean protein fiber is pretreated to form regenerated soybean protein fiber with space gaps inside the fiber, then the regenerated soybean protein fiber, the water-soluble vinylon short fiber and the high-moisture-absorption fiber are spirally twisted to form yarn, the yarn is subjected to fiber removal treatment to remove the water-soluble vinylon short fiber to form space gaps among the yarn, and the space gaps are utilized to improve the yarn and fill the anti-bacterial material. The yarn has good moisture absorption and air permeability, bacteriostasis and heat preservation effects, and can effectively improve the wearing comfort of fabrics woven by the yarn.

Description

High-hygroscopicity yarn and preparation method thereof

Technical Field

The invention relates to a yarn processing technology in the technical field of textiles, in particular to a high-hygroscopicity yarn and a preparation method thereof.

Background

The yarn is a soft and slender fiber aggregate which is formed by gathering various textile fibers along the length direction and has certain mechanical properties, is also the most important basic material for manufacturing the fabric, can be widely applied to textile operations such as weaving, rope making, thread making, knitting, embroidery and the like, and along with the improvement of textile technology and the improvement of people's pursuit of life quality, the demands of people on various living goods are more and more diversified, the requirements on the fabric are not only limited to comfort, and meanwhile, the fabric or the fiber is expected to have some functionality.

In recent years, people have higher and higher requirements on the comfort, health, safety, environmental protection and the like of the garment fabric, along with the increase of outdoor activity time of people, the market demands of sports towels and close-fitting sports clothes are higher and higher, the fabrics used for making sports towels and close-fitting sports clothes not only require good comfort, but also require good moisture absorption, air permeability and heat preservation, the prior art mostly adopts cotton fiber yarns made of single materials as raw materials for weaving, bamboo fiber yarns appear in recent years, however, no matter the cotton fiber yarns or the bamboo fiber yarns, the moisture absorption of the yarns is not satisfactory, and after moisture absorption, the fibers transversely swell after absorbing moisture in a large quantity, so that gaps between the yarns are closed, the moisture diffusion speed is low, absorbed moisture cannot diffuse outwards, the moisture diffusion speed is low, and bacteria are easy to breed when the yarns meet a warm environment or are not dried or air-dried in time.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a high moisture absorption yarn and a preparation method thereof, so as to solve the defects in the technical background.

The technical problem solved by the invention is realized by adopting the following technical scheme:

a high-hygroscopicity yarn comprises a core wire, a core-spun layer and a surface layer formed on the outer surface of the core-spun layer;

the core wire is made by spirally twisting regenerated soy protein fibers, water-soluble vinylon short fibers and high-moisture-absorption fibers, the regenerated soy protein fibers are provided with fiber internal clearance channels and spaces with smaller sizes, the water-soluble vinylon short fibers are dissolved after the fiber removal treatment, so that the corresponding water-soluble vinylon short fibers in the core wire are replaced by the clearance channels and spaces with larger sizes, and then the two fiber internal clearance channels and spaces of the core wire with the technical characteristics are filled with antibacterial materials;

the core-spun layer is formed by twisting high-strength fiber yarns, and the surface layer is formed by twisting skin-friendly fibers.

By way of further limitation, the regenerated soy protein fiber in the core is made by: the soybean protein fiber is bleached and then soaked in warm water for constant-temperature water bath, and then soaked in the warm water bath for rapid cooling, so that a small-size clearance channel and a small-size space with stable structure are formed in the fiber.

The core wire is further limited to have the content of the regenerated soybean protein fiber not less than 30 wt%, the content of the water-soluble vinylon short fiber is 5-8 wt%, and the water temperature of the water-soluble vinylon short fiber is more than or equal to 70 ℃.

As a further limitation, the bacteriostatic material is silver ions and nano titanium dioxide.

By way of further limitation, the high moisture absorption fibers are one or a combination of wool fibers, viscose fibers, jute fibers and cotton fibers.

The skin-friendly fiber is further limited to be one of cotton fiber, hemp fiber, bamboo fiber and wool fiber, or the mixture fiber of the cotton fiber, the hemp fiber, the bamboo fiber or the wool fiber and the modal, the polyester fiber, the spandex and the lycra in any proportion.

By way of further limitation, the skin-friendly fiber is subjected to pre-soaking treatment by using a solution of sodium bromide and polyvinyl alcohol before being twisted on the core-spun layer, so that better surface hydrophilicity is obtained.

The preparation method of the high-moisture-absorption yarn is used for preparing the high-moisture-absorption yarn with the technical characteristics, and comprises the following operation steps:

1) and (2) bleaching the soybean protein fiber, adding the bleached soybean protein fiber into warm water at the temperature of 50-60 ℃, soaking for 1-2 h at constant temperature, taking out, and putting into ice water for quick cooling treatment to obtain the regenerated soybean protein fiber.

2) Twisting the regenerated soybean protein fiber, the water-soluble vinylon short fiber and the high-moisture-absorption fiber according to a ratio to prepare a core wire, adding the twisted core wire into hot water for water bath de-dimensionality treatment, wherein the water temperature of the hot water is 8-15 ℃ higher than the water temperature for dissolving the water-soluble vinylon short fiber during de-dimensionality, the bath ratio of the de-dimensionality is controlled to be 1: 15-1: 20, and the de-dimensionality time is controlled to be 30-45 min.

3) And adding the core wire subjected to dimensionality reduction treatment into a glycine nitrate chelated silver soaking solution, soaking for 6-8 h, then putting into nano titanium dioxide sol, performing ultrasonic dispersion treatment for 20-30 min, performing filter pressing to obtain excessive sol after dispersion is completed, washing for 10-20S with running water, and drying with hot air to obtain the treated core wire.

4) Twisting a layer of the fiber-rich yarn on the surface of the core wire prepared in the step 3) to be used as a core-spun layer.

5) Twisting a layer of skin-friendly fiber in a Z-shaped twisting direction on the outer surface of the core-spun layer prepared in the step 4) as a surface layer to obtain the finished antibacterial yarn.

Has the advantages that: the invention improves the soybean protein fiber by the process, and utilizes the fiber characteristics of the soybean protein fiber to be twisted with the water-soluble vinylon short fiber and the high moisture absorption fiber in proportion to form the core wire, so that two types of space gaps, namely a large space gap and a small space gap, are formed in the core wire, the space gap with the space structure can effectively cooperate with the high moisture absorption fiber to absorb moisture, and the moisture is locked in the space gap to improve the moisture absorption capacity of the yarn; the antibacterial performance of the yarn after moisture absorption is improved by filling the antibacterial agent in the gaps, the outer layer of the core wire is wrapped and reinforced by the strong fibers, the strength and stability of the core wire are guaranteed while the core wire absorbs moisture, the surface touch feeling and the heat retention property are improved by matching with skin-friendly fibers, the yarn can be stored and transported for a long time, and the yarn has better washing resistance.

Drawings

FIG. 1 is a cross-sectional view of a yarn according to a preferred embodiment of the invention.

Wherein: 1. a core wire; 2. a high tenacity fiber yarn; 3. a core-spun layer; 4. a blend fiber yarn; 5. a surface layer.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the following examples, it will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In the present embodiment, the yarn structure is shown in fig. 1, and includes a core 1, a core layer 3 and a surface layer 5, wherein the core 1 is made by spirally twisting regenerated soy protein fiber, water-soluble vinylon short fiber and high moisture absorption fiber, and the core 1 includes 30-60 wt% of regenerated soy protein fiber, 5-8 wt% of water-soluble vinylon short fiber with a water-soluble water temperature of 75 ℃ and the balance high moisture absorption fiber.

Wherein the regenerated soy protein fiber is prepared by the following steps: bleaching the finished soybean protein fiber by using a bleaching agent, adding the bleached soybean protein fiber into warm water at 55 ℃ to soak for 90min at constant temperature, taking out, immediately putting into ice water to carry out quick cooling treatment, wherein the treatment time of the ice water is 20min, taking out and drying to obtain the regenerated soybean protein fiber.

The method comprises the steps of twisting treated regenerated soybean protein fibers, water-soluble vinylon short fibers and high-moisture-absorption fibers according to a ratio to prepare core wires, adding the twisted and formed core wires into a hot water bath kettle at 85 ℃ to perform hot water de-dimensionality treatment, controlling the bath ratio of de-dimensionality to be 1:20, controlling the de-dimensionality time to be 42min, adding the core wires into 15 wt% glycine nitrate chelated silver soaking liquid to soak for 8h after the de-dimensionality treatment is finished, then putting the core wires into nano titanium dioxide sol to perform ultrasonic dispersion treatment for 25min, performing filter pressing on the dispersed core wires to obtain excessive sol, washing the core wires with running water for 20S, and drying the treated core wires by hot air to obtain the treated core wires 1.

Straightening the core wire 1 treated in the operation steps, spirally twisting a layer of high-strength fiber yarn 2 on the surface of the core wire in a counterclockwise direction according to the pattern shown in figure 1 to form a core-spun layer 3, and spirally twisting a layer of mixture fiber yarn 4 on the surface of the core-spun layer 3 in a clockwise direction to form a surface layer 5 to obtain the finished product yarn. The surface layer 5 shows the touch and surface properties of the yarn to the outside, so that a skin-friendly fiber yarn with better touch should be used, and in this embodiment, the skin-friendly fiber yarn is prepared by twisting 78% of cotton fiber, 15% of polyester fiber and 7% of lycra.

In another embodiment, the natural fiber components (such as cotton fiber, hemp fiber, bamboo fiber, and wool fiber) in the mixture fiber yarn 4 may be pre-soaked with a solution of sodium bromide and polyvinyl alcohol before twisting to obtain better surface hydrophilicity in consideration of the surface hydrophilicity of the surface layer 5.

The regenerated soybean protein fiber adopted in the invention is prepared by taking soybean protein as a raw material and taking the soybean protein fiber obtained by wet spinning as the raw material, the soybean protein fiber has good physical and chemical properties, the single fiber fineness is low, the strength is higher than that of natural fibers such as wool, cotton, silk and the like, the spinnability is good, and meanwhile, the soybean protein fiber has the characteristics of the soybean protein as a vegetable protein fiber and contains a plurality of amino acids necessary for human bodies. The soybean protein bleaching fabric has a certain health care function when being worn for a long time, and meanwhile, the soybean protein fibers are soaked at a constant temperature of 50-60 ℃, so that the surfaces of the soybean protein fibers are expanded, the internal structure of the plant protein can be damaged through rapid cooling, the internal tissue structure of the fibers is changed, the oil bodies are induced to be fused with each other, and partial protein bodies of the fibers are damaged, so that gaps and channels are formed in the internal system of the bleached soybean protein fibers.

Under the condition of obtaining the bleached soybean protein fiber, the water-soluble vinylon short fiber and the high-moisture-absorption fiber are twisted into a core wire according to a ratio, after the water-soluble vinylon short fiber in the core wire is removed, a first type of small-size gaps and channels which are arranged in the bleached soybean protein fiber and a second type of large-size gaps and channels which are arranged in the core wire and belong to the water-soluble vinylon short fiber are formed in the core wire, the yarns with the two types of gaps and channels are subjected to modification treatment, the chelated silver can be retained and fixed through the gaps and channels, the surface of the fiber is stabilized through titanium dioxide sol, the chelated silver is prevented from being separated out, and the antibacterial property of the chelated silver ions is further consolidated.

However, the tenacity of the bleached soybean protein fiber after the quick cooling damage is reduced, the bleached soybean protein fiber is easy to become brittle and lose elasticity, so that the physical performance of a core wire is influenced, the high-tenacity fiber wrapped outside the core wire is taken as a fiber material with elastic recovery, water absorption and lower water swelling degree, the water absorption performance of the yarn can be improved in an auxiliary mode, the core wire can be provided with good dimensional stability in a mode of wrapping the core wire to form a core-spun layer, the fabric woven by the finished yarn can be ensured to be stiff and smooth, the shrinkage and deformation cannot occur after the washing, and the durability of the fabric is improved. The skin-friendly fiber formed on the outer layer is mainly used for making up the hand feeling defect of the yarn, so that the hand feeling of the yarn is closer to that of the skin-friendly fiber.

In the examples, in order to comprehensively express the moisture absorption performance and the bacteriostasis performance in the above examples, the amounts of the regenerated soybean protein fiber, the water-soluble vinylon short fiber and the high moisture absorption fiber in the core wire are used as variables to prepare core wires 1 with different components, the core wires 1 are prepared into five groups of yarns of different examples according to the above operation mode, pure cotton fiber yarns with the same cross section area and coolplus fiber yarns with better moisture absorption performance sold in the market are respectively used as a comparison group 1 and a comparison group 2 to carry out moisture absorption performance test and bacteriostasis test, when carrying out the moisture absorption performance test, the yarns are firstly woven into double-thread knitted sheets with the same specification and tissue structure, then the moisture absorption performance is expressed according to the mode of FZ/T01071-2008 textile capillary effect test method, the moisture absorption performance is expressed by the wicking height, and the bacteriostasis test is carried out by using escherichia coli, bacillus subtilis and staphylococcus aureus as indicators, the bacteriostasis rate of the fabric after moisture absorption saturation for 24 hours is tested, and the test result is as follows:

from the test results in the above table, it can be seen that the yarn produced under the technical conditions of the present invention not only has better moisture absorption, but also is significantly better than the comparative groups 1 and 2 in terms of the bacterial effect after moisture absorption.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The high-hygroscopicity yarn is characterized by comprising a core wire, a core-spun layer and a surface layer formed on the outer surface of the core-spun layer;

the core wire is made by spirally twisting regenerated soy protein fibers, water-soluble vinylon short fibers and high-moisture-absorption fibers, the regenerated soy protein fibers are provided with fiber internal clearance channels and spaces with smaller sizes, the water-soluble vinylon short fibers are dissolved after the fiber removal treatment, so that the corresponding water-soluble vinylon short fibers in the core wire are replaced by the clearance channels and spaces with larger sizes, and then the two fiber internal clearance channels and spaces of the core wire with the technical characteristics are filled with antibacterial materials;

the core-spun layer is formed by twisting high-strength fiber yarns, and the surface layer is formed by twisting skin-friendly fibers.

2. The highly hygroscopic yarn as claimed in claim 1, wherein said regenerated soy protein fiber in core is prepared by: the soybean protein fiber is bleached and then soaked in warm water for constant-temperature water bath, and then soaked in the warm water bath for rapid cooling, so that a clearance channel and a space with stable structure are formed in the fiber.

3. The high-hygroscopicity yarn as claimed in claim 1, wherein the proportion of the regenerated soy protein fibers in the core is not less than 30 wt%, the proportion of the water-soluble vinylon short fibers is 5-8 wt%, and the temperature of water in which the water is dissolved in the water-soluble vinylon short fibers is not less than 70 ℃.

4. The yarn of claim 1, wherein the bacteriostatic material is silver ions and nano titanium dioxide.

5. The yarn of claim 1, wherein the high moisture absorption fibers are one or a combination of wool fibers, viscose fibers, jute fibers, and cotton fibers.

6. The high moisture absorption yarn of claim 1, wherein the skin-friendly fiber is one of cotton fiber, hemp fiber, bamboo fiber and wool fiber, or a mixture of cotton fiber, hemp fiber, bamboo fiber or wool fiber with any proportion of modal, polyester fiber, spandex and lycra.

7. The highly hygroscopic yarn as claimed in claim 1 wherein said skin-friendly fibers are pre-soaked with a solution of sodium bromide and polyvinyl alcohol to achieve better surface hydrophilicity before being twisted over the core layer.

8. The preparation method of the high-moisture-absorption yarn is used for preparing the high-moisture-absorption yarn with the technical characteristics, and is characterized by comprising the following operation steps:

1) bleaching the soybean protein fiber, adding the bleached soybean protein fiber into warm water at the temperature of 50-60 ℃, soaking for 1-2 h at constant temperature, taking out, and putting into ice water for quick cooling treatment to obtain regenerated soybean protein fiber;

2) twisting the regenerated soybean protein fiber, the water-soluble vinylon short fiber and the high-moisture-absorption fiber according to a ratio to prepare a core wire, adding the twisted core wire into hot water for water bath de-dimensionality treatment, wherein the water temperature of the hot water is 8-15 ℃ higher than the water temperature for dissolving the water-soluble vinylon short fiber during de-dimensionality, the bath ratio of the de-dimensionality is controlled to be 1: 15-1: 20, and the de-dimensionality time is controlled to be 30-45 min;

3) adding the core wire subjected to dimensionality reduction treatment into a glycine nitrate chelated silver soaking solution, soaking for 6-8 h, then putting into a nano titanium dioxide sol, carrying out ultrasonic dispersion treatment for 20-30 min, carrying out filter pressing on the excessive sol after dispersion is completed, washing for 10-20S with running water, and drying with hot air to obtain the treated core wire;

4) twisting a layer of the high-strength fiber yarns on the surface of the core wire prepared in the step 3) to serve as a core-spun layer;

5) twisting a layer of skin-friendly fiber in a Z-shaped twisting direction on the outer surface of the core-spun layer prepared in the step 4) as a surface layer to obtain the finished antibacterial yarn.

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