CN114934334B

CN114934334B - Preparation process of ring spinning core spun yarn

Info

Publication number: CN114934334B
Application number: CN202210705491.4A
Authority: CN
Inventors: 蔡先彪; 何新华; 徐光耀
Original assignee: Hunan Kelijia Textile Co ltd
Current assignee: Hunan Kelijia Textile Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2023-10-13
Anticipated expiration: 2042-06-21
Also published as: CN114934334A

Abstract

The application discloses a preparation process of ring spinning core spun yarn, which takes reinforcing fiber and UHMWPE fiber as raw materials to prepare core yarn, wherein the first core yarn obtained by twisting the opened reinforcing fiber and natural plant fiber and the second core yarn obtained by twisting the UHMWPE fiber are wound in parallel to obtain double-strand core yarn; then, soaking and modifying the double-strand core yarn by utilizing nano plant cellulose mixture colloid doped with bismaleimide powder and TPE powder, and treating a space gap structure by utilizing carbohydrate hydrolase after modification to obtain the double-strand core yarn serving as the core yarn; and then carrying out core-spun wet spinning on the core yarn by using the outer-spun fiber according to the existing ring spinning process to obtain core-spun wet spun yarn, and processing the core-spun wet spun yarn to obtain the finished ring spun core-spun yarn. The ring spinning core-spun yarn can replace the core yarn of the traditional spandex core-spun yarn and improve the overall performance of the spandex core-spun yarn.

Description

Preparation process of ring spinning core spun yarn

Technical Field

The application relates to a yarn preparation technology in the technical field of spinning, in particular to a preparation process of ring spinning core-spun yarn.

Background

With the improvement of the living standard of people, the demands of people on consumer products are also higher, wherein the demands of textile products are developed from the initially pursued warmth retention to the functional directions of comfort, attractive appearance, health benefit and the like, functional textiles are generated, and various functional textile products are continuously developed. The core yarn is formed by winding the outer covering fiber around the outer periphery of the core yarn, has excellent characteristics of the outer covering fiber, such as good texture, fluffiness, high fullness, and the like, and also has excellent characteristics of the core yarn as a skeleton yarn, such as strong elongation, shape retention, drapability, wrinkle resistance, uniform evenness, and uniform fabric cloth cover effect, and the like, and thus has been widely used in textile industry.

In the prior art, spandex is generally adopted as core yarn, and as the requirements of people on the quality and grade of fabric products are increasingly improved, the demand of various clothing fabrics is continuously increased, and the high-quality core yarn is required to uniformly and neatly wind the outer wrapping fiber on the outer surface of the core yarn, so that the core yarn is required to be always kept in a tensioned and straightened state in the spinning process to meet the requirements, and then the outer wrapping fiber is uniformly wound on the core yarn for twisting with equal winding pitch; the traditional spandex core-spun yarn is required to be tensioned when the core-spun yarn is produced, the quality of the formed core-spun yarn is directly influenced by the tensioning effect and the tensioning state of the traditional spandex core-spun yarn, and the core yarn tensioning device is easy to generate fatigue damage, so that yarn defects such as yarn deflection, uneven evenness, uneven elasticity, hairiness, hollow core, bare yarn and the like exist in the production process of the core-spun yarn; meanwhile, the traditional polyurethane core-spun yarn processed product also has the problems of poor heat resistance, water intolerance and poor dimensional stability, and the use requirement of the existing fabric is difficult to meet.

Therefore, it is of great importance to study a method for preparing a core spun yarn without using spandex.

Disclosure of Invention

The technical problem solved by the application is to provide a preparation process of ring spinning core-spun yarn, so as to solve the defects in the technical background.

The technical problems solved by the application are realized by adopting the following technical scheme:

the preparation process of the ring spinning core-spun yarn specifically comprises the following operation steps:

s1, preparing a core yarn by taking reinforcing fibers and UHMWPE fibers as raw materials; during preparation, the reinforced fiber is subjected to physical opening treatment, and then the reinforced fiber subjected to physical opening is twisted with the natural plant fiber to obtain a first core yarn; twisting UHMWPE fibers to obtain second core yarns; the first core yarn and the second core yarn are wound in parallel to obtain a double-strand core yarn;

s2, adding deionized water into nano plant cellulose to prepare a suspension, fully and uniformly dispersing the obtained suspension, performing pressurized percolation, adding bismaleimide powder and TPE powder into the percolate, and performing auxiliary dispersion by using high-frequency ultrasonic waves; fully soaking the double-strand core yarn obtained in the step S1 by the obtained mixture colloid, and performing low-temperature air drying after the soaking is finished to obtain the double-strand core yarn subjected to modification treatment;

s3, treating the modified double-strand core yarn by using carbohydrate hydrolase to form double-strand core yarn with strip-shaped and dot-hole-shaped space gaps, and obtaining the core yarn;

s4, preparing an outer wrapping fiber, and spinning the outer wrapping fiber into an outer roving after treatment; then, carrying out core-spun wet spinning under the ring spinning process condition by utilizing a wet spinning frame to obtain core-spun wet spun yarns;

and S5, washing the core spun wet yarn with hot water to remove redundant bismaleimide resin and TPE, and drying to obtain the ring spun core spun yarn.

As a further definition, the reinforcing fibers are EKS fibers or modified polyaramid fibers;

when the EKS fiber is adopted, the core spun yarn with good hygroscopicity, heat preservation and antibacterial property and important comfort performance is obtained, and can be used for preparing fabrics such as underwear, socks and the like;

when the modified poly (arylene oxadiazole) fiber is adopted, the core spun yarn with better strength and toughness and important structural strength is obtained, and the core spun yarn can be used for preparing fabrics such as sportswear, working clothes and the like.

As a further limitation, when the reinforcing fibers are subjected to the physical opening treatment, the reinforcing fibers are laid flat on a carbon fiber plate, and then the opening is performed by performing continuous needling and carding operations by using a needle comb.

As a further limitation, the natural plant fibers employed in the first core yarn are mango fibers, and the mass ratio of the reinforcing fibers employed in the first core yarn to the mango fibers is 3:1 to 4:1.

As a further limitation, the ratio of the core yarn diameters of the first core yarn to the second core yarn in the doubled core yarn is 1:1 to 2:1.

As a further limitation, when preparing the suspension by utilizing the nano plant cellulose, controlling the amount of the nano plant cellulose added into each liter of deionized water to be 20-30 g;

the mass ratio of the bismaleimide powder to the TPE powder is 1:1-3:1, and the sum of the mass of the bismaleimide powder and the mass of the TPE powder added in the percolate is not more than 50% of the mass of the nano plant cellulose serving as the raw material.

By way of further limitation, when the percolate is subjected to auxiliary dispersion by high-frequency ultrasonic waves, the ultrasonic frequency is controlled to be 45-50 kHz, the ultrasonic power is controlled to be 300-450W, and after 45S is processed, 10S is stopped, and the treatment is performed for 30-45 min by taking the ultrasonic frequency as a circulation.

By way of further limitation, when the mixture colloid is used for carrying out the infiltration treatment on the double-strand core yarn, the infiltration time is 48-72 h, the low-temperature air drying is carried out after the infiltration is finished, the air drying temperature is 50-60 ℃ during the treatment, the air flow rate is 5-8 m/S, and the water content of the double-strand core yarn is below 15% when the air drying is finished.

By way of further limitation, when hot water washing operation is performed on the core spun wet yarn, running water washing is performed at 80 to 90 ℃ by controlling the temperature of the hot water.

As a further limitation, after the hot water washing operation is performed on the core spun wet yarn in step S5, the core spun wet yarn is modified and soaked by using vaseline, silicone oil and an antistatic agent, so that the antistatic performance and the water washing resistance of the core spun wet yarn can be effectively improved.

According to the technical scheme, EKS fibers and modified polyaromatic oxadiazole fibers are adopted as reinforcing fibers to be twisted with natural plant fibers to obtain first yarns, the first yarns obtained by twisting UHMWPE fibers are matched to be wound in parallel to obtain double-strand core yarn yarns, and spandex in the traditional core-spun yarn is replaced by the double-strand core yarn yarns serving as core yarns, so that the core-spun yarn prepared without spandex is obtained.

The EKS fiber serving as the reinforcing fiber and the modified polyaromatic oxadiazole fiber have strong structural stability, can provide good adsorption stability in the subsequent infiltration process, and are convenient for absorbing and retaining nano plant cellulose, bismaleimide powder and TPE powder in the colloid.

The first core yarn formed by twisting the reinforcing fiber and the natural plant fiber can partially hydrolyze the nano plant cellulose and the natural plant fiber when being treated by using carbohydrate hydrolase due to the existence of the nano plant cellulose and the natural plant fiber, so that strip-shaped and point-hole-shaped space gaps are formed in the first yarn; the structural stability of the first yarn with the structure is reduced, so that the second core yarn twisted by UHMWPE fibers is adopted for ply reinforcement, the UHMWPE (ultra high molecular weight polyethylene) is high-performance fiber, the strength of the first yarn lost under the enzymolysis condition can be reinforced, and meanwhile, the UHMWPE fiber with toughness and the two reinforcing fibers have certain elastic restoring force due to the existence of the space gap of the first yarn, so that the replacement of the spandex core yarn can be realized, and compared with the spandex core yarn, the structural stability is better, and the core spun yarn is not required to be carried out under the tensioning state; meanwhile, the prepared core spun yarn has better temperature change resistance and water washing resistance, and has better dimensional stability.

Detailed Description

The application is further described in connection with the following embodiments in order to make the technical means, the creation features, the achievement of the purpose and the effect of the application easy to understand.

In the following examples, it will be understood by those skilled in the art that 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 unless defined otherwise. 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.

Embodiment one:

the core spun yarn of example one was prepared as follows:

in this embodiment, the reinforcing fiber is an EKS fiber, and the EKS fiber focuses on comfort, and has properties of temperature adjustment, humidity adjustment and antibacterial, and can assist in improving the above properties of the produced core spun yarn.

First, a core yarn is prepared:

before the preparation of the core spun yarn, the EKS fiber serving as a raw material is subjected to physical opening, the EKS fiber is laid on a carbon fiber plate during the physical opening, then continuous needling and carding operation is carried out by using a needle comb to realize the opening, and the opened EKS fiber is obtained for standby after the opening is completed.

Mixing EKS fibers with mango fibers according to EKS fibers: and twisting the mango fibers with a mass ratio of 4:1 to obtain the first core yarn.

The second core yarn is obtained by twisting UHMWPE fibers while the first core yarn is being prepared.

And (3) winding the first core yarn and the second core yarn in parallel to obtain a double-strand core yarn, and controlling the ratio of the core yarn diameters of the first core yarn to the second core yarn in the double-strand core yarn to be 1:1.

Then preparing a modified colloid solution:

adding nano plant cellulose into deionized water according to the proportion of 20g of nano plant cellulose per liter of deionized water, dispersing uniformly to obtain suspension, carrying out pressurized infiltration on the suspension in a cellulose permeable membrane filtration system by utilizing vacuum pressure of 0.5MPa to obtain leachate, adding 200-mesh bismaleimide powder and TPE powder into the leachate, controlling the adding mass of the mixture powder to be 30% of the mass of the nano plant cellulose serving as a raw material in the suspension, and controlling the mass ratio of the bismaleimide powder to the TPE powder in the mixture powder to be 1:1. After the mixture powder is added, the mixture suspension is treated by high-frequency ultrasonic waves, the ultrasonic frequency is controlled to be 45kHz, the ultrasonic power is controlled to be 300W, 10S is stopped after 45S is treated, the mixture is circulated, the treatment is carried out for 45min, and the modified colloid solution is obtained after the treatment is finished for standby.

The double-strand core yarn prepared by the method is subjected to infiltration modification by utilizing the modified colloid solution, the infiltration duration is controlled to be 48 hours when the infiltration modification treatment is carried out, the double-strand core yarn is taken out after the infiltration is finished, the double-strand core yarn is extruded out of the excessive colloid solution and then is subjected to low-temperature air drying, the air drying temperature is controlled to be 52 ℃, the air flow rate is 8m/S, and the modified double-strand core yarn is obtained after the modification treatment is dried to the water content of 12%;

the modified double-strand core yarn is treated by using carbohydrate hydrolase, and the carbohydrate hydrolase can hydrolyze most of natural plant fibers and part of nano plant cellulose in the core yarn, and strip-shaped and dot-shaped hollows are obtained at the hydrolysis position to obtain the core yarn;

for the preparation of the over-wrap fiber, in various embodiments, the over-wrap fiber may be most of the fabric fibers on the market, i.e., the over-wrap fiber used for preparing the spandex core-spun yarn may be used for preparing the core-spun yarn of this embodiment. In this embodiment, the long staple cotton fiber of Xinjiang is used as the outer wrapping fiber, and the core spun yarn prepared has the touch feeling and the surface property of the long staple cotton of Xinjiang.

Spinning the fine cotton fibers obtained after the Xinjiang long staple cotton fibers are cleaned into outer-layer roving, then performing core-spun wet spinning under the ring spinning process condition by using a wet spinning frame to obtain core-spun wet spun yarns, washing the core-spun wet spun yarns with hot water at 80 ℃ to remove redundant bismaleimide resin and TPE, and drying to obtain finished ring-spun core-spun yarns.

The finished ring spinning core-spun yarn has good hygroscopicity, heat preservation and antibacterial property, the hand feeling of the finished ring spinning core-spun yarn is close to that of the core-spun yarn made of spandex with the same size and the core-spun yarn made of Xinjiang long staple cotton fibers with the same process, and the antibacterial property is due to the spandex core-spun yarn, and the finished ring spinning core-spun yarn has the advantages of good glossiness, light weight, stiff and smooth texture, soft hand feeling and the like; in addition, the polyurethane core spun yarn is obviously superior to spandex core spun yarn in terms of ultimate pulling performance and tensile pulling fatigue performance, can be used for preparing fabrics such as underwear and the like, and is particularly suitable for being used as underwear and silk stockings.

Embodiment two:

the core spun yarn of example two was prepared as follows:

in this embodiment, the reinforcing fiber is a modified polyaromatic oxadiazole fiber (POD fiber), which has the characteristics of high temperature resistance, corrosion resistance and dimensional stability, and can assist in improving the above properties of the produced core spun yarn.

First, a core yarn is prepared:

before the preparation of the core spun yarn, the POD fiber serving as a raw material is subjected to physical opening, the POD fiber is laid on a carbon fiber plate during the physical opening, and then continuous needling and carding operation is carried out by using a needle comb to realize the opening, so that the opened POD fiber is obtained for standby after the opening is completed.

Mixing POD fiber with mango fiber according to the following steps: and twisting the mango fibers with a mass ratio of 3:1 to obtain the first core yarn.

Then preparing a modified colloid solution:

adding 30g of nano plant cellulose into deionized water according to the proportion of 30g of nano plant cellulose per liter of deionized water, dispersing uniformly to obtain suspension, carrying out pressurized infiltration on the suspension in a cellulose permeable membrane filtration system by utilizing vacuum pressure of 0.6MPa to obtain infiltration liquid, adding 300-mesh mixture powder of bismaleimide powder and TPE powder into the infiltration liquid, controlling the adding mass of the mixture powder to be 40% of the mass of the nano plant cellulose serving as a raw material in the suspension, and controlling the mass ratio of the bismaleimide powder to the TPE powder in the mixture powder to be 2:1. After the mixture powder is added, the mixture suspension is treated by high-frequency ultrasonic waves, the ultrasonic frequency is controlled to be 45kHz, the ultrasonic power is controlled to be 400W, 10S is stopped after 45S is treated, the mixture is circulated, the treatment is carried out for 38min, and the modified colloid solution is obtained after the treatment is finished for standby.

The double-strand core yarn prepared by the method is subjected to infiltration modification by utilizing the modified colloid solution, the infiltration duration is controlled to be 64 hours when the infiltration modification treatment is carried out, the double-strand core yarn is taken out after the infiltration is finished, the double-strand core yarn is extruded out of the excessive colloid solution and then is subjected to low-temperature air drying, the air drying temperature is controlled to be 60 ℃, the air flow rate is 6m/S, and the modified double-strand core yarn is obtained after the modification treatment is carried out when the modified double-strand core yarn is dried to the water content of 13%;

treating the modified double-strand core yarn by utilizing carbohydrate hydrolase to form double-strand core yarn with strip-shaped and dot-hole-shaped space gaps, and obtaining core yarn;

spinning nylon fiber as a raw material into an outer-layer roving, then carrying out core-spun wet spinning under the ring spinning process condition by utilizing a wet spinning frame to obtain a core-spun wet spun yarn, washing the core-spun wet spun yarn by utilizing hot water at 80 ℃ to remove redundant bismaleimide resin and TPE, and then carrying out modification soaking treatment on the core-spun wet spun yarn by utilizing Vaseline, organic silicone oil and an antistatic agent to effectively improve the antistatic property and the water washing resistance of the core-spun wet spun yarn, and then carrying out hot air drying to obtain the finished ring-spun core-spun yarn.

The finished ring spinning core spun yarn has better air permeability, structural strength and stability, and the fabric woven by the yarn has better air permeability, straight outline texture, better elasticity, crease resistance and heat preservation, and the same-size spandex is adopted as the core yarn and the nylon fiber is adopted as the outer wrapping fiber, so the performance of the core spun yarn is superior to that of the core spun yarn, and meanwhile, the fabric prepared by the core spun yarn has the effects of stiff and smooth texture, draping and shape retention, and is particularly suitable for being used as an operation suit, a sports outer liner and a high-grade clothing liner.

The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made without departing from the spirit and scope of the application, which is defined in the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.

Claims

1. The preparation process of the ring spinning core-spun yarn is characterized by comprising the following steps of:

2. The process for preparing a ring spun core spun yarn of claim 1 wherein the reinforcing fiber is EKS fiber or modified polyaramid fiber.

3. The process for producing a ring spun core spun yarn of claim 1 wherein the physical opening of the reinforcing fibers is performed by spreading the reinforcing fibers on a carbon fiber sheet and then continuously needling and carding with a needle comb.

4. The process for preparing ring spun core spun yarn of claim 1 wherein the natural plant fiber employed in the first core yarn is mango fiber and the mass ratio of the reinforcing fiber employed in the first core yarn to the mango fiber is 3:1-4:1.

5. The process for preparing a ring spun core spun yarn of claim 1 wherein the ratio of the core yarn diameters of the first core yarn to the second core yarn in the doubled core yarn is 1:1 to 2:1.

6. The process for preparing ring spun core spun yarn of claim 1 wherein the amount of nano plant cellulose added per liter of deionized water is controlled to be 20-30 g when preparing the suspension by nano plant cellulose.

7. The process for preparing ring spun core spun yarn of claim 6 wherein the mass ratio of bismaleimide powder to TPE powder added is 1:1-3:1 and the sum of the mass of bismaleimide powder and TPE powder added in the percolate is not more than 50% of the mass of the nano plant cellulose as raw material.

8. The process for preparing a ring spun core spun yarn of claim 1, wherein the ultrasonic frequency is controlled to be 45-50 kHz, the ultrasonic power is 300-450W, and the treatment is stopped for 10S after each 45S treatment, and the treatment is performed for 30-45 min by using the ultrasonic as a circulation.

9. The process for preparing ring spun core yarn according to claim 1, wherein when the double-strand core yarn is subjected to infiltration treatment by using the mixture colloid, the infiltration time is 48-72 h, the low-temperature air drying is performed after the infiltration is completed, the air drying temperature is 50-60 ℃, the air flow rate is 5-8 m/S, and the water content of the double-strand core yarn is below 15% when the air drying is completed.

10. The process for producing a ring spun core spun yarn of claim 1 wherein, when the core spun wet yarn is subjected to a hot water washing operation, the hot water temperature is controlled to 80-90 ℃ to carry out a running water washing operation.