KR101269888B1 - Method of manufacturing pre-dyeing cotton yarn with excellent shrinkage property - Google Patents

Abstract

The present invention relates to a method for producing stretch functional yarn dyed cotton yarn, specifically, in the manufacture of cotton knitted fabric, by applying twist to the first strand of cotton yarn (ⅰ) cotton yarn to impart a first morphological change to the cotton yarn. (Ii) through a step of forming a second morphological change to the cotton yarns by applying twisting while braiding two or more strands of the cotton yarn in which the first morphological change has occurred through the low rolling process; It is characterized by.
In addition, the present invention is to use the cotton yarn in which the first and second morphological changes as described above to refine and reduce the knitted fabric and then to fix the shape of the cotton knitted fabric by chemical treatment, form fixing and dyeing treatment It is characterized in that the knitting cotton knit.
The elastic functional yarn dyed yarn manufactured according to the present invention has excellent thermal insulation, moisture retention, hygroscopicity, comfort, etc. inherent in cotton yarn, and also has excellent elastic functional properties as well as cotton fiber alone.

Description

Method of manufacturing pre-dyeing cotton yarn with excellent shrinkage property

The present invention relates to a method for producing a dyed cotton yarn expressing stretch functionality.

Cotton fiber is the most widely used fiber of mankind. As artificial fiber develops, cotton fiber accounts for less than 50% of the world's fiber consumption. Cotton has good durability and hygroscopicity, so it is comfortable to wear, absorbs dirt well, is hygienic, easy to wash, less damage to fibers, and excellent dyeability and color fastness. Cotton is used as a material for all garments, including underwear, but the disadvantage is that wrinkles are good and form stability is insufficient, and cotton itself is difficult to have elasticity. Therefore, cotton fibers are still widely used despite the development of artificial fibers by blending with synthetic fibers or developing fabrics having various characteristics such as shrinkage, spindleability, and water repellency through special processing methods.

Recently, the trend of textile products is that various functional textiles are commercialized and sold in accordance with various needs of consumers due to technological advances, consumer level improvement, and changes in the international environment. In particular, these days, consumers who value well-being and a comfortable life want clothes that fit their body, are comfortable, have a constant and easy care, and also develop TV and various media. Since they purchase clothing as a medium for expressing their individuality, not only young people who are sensitive to fashion but also young adults, elastic materials are constantly being developed to satisfy human instincts that want to have a beautiful and beautiful body.

Cotton fiber is still emerging as an environmentally friendly material that does not cause secondary environmental pollution in recent years as it has excellent thermal insulation, moisture retention, hygroscopicity, comfort after wearing, cleanliness, and blending with other fibers. The market is expected to expand, but grasps the fact that cotton fiber alone cannot have elasticity, and the present inventors have completed various researches and developments to impart stretch functionality even with cotton fiber alone.

Looking at the methods to give elasticity to synthetic fibers or natural fibers to date, the first method is to use the crimping of the fiber by processing the synthetic fiber, a thermoplastic fiber, and the second method is to use the torque of the fiber (Torque) The more twisted the fiber, the more twisted the fiber becomes, and the more twisted-heat-fixed-decomposed fiber is used to give coil elasticity. The third method is polyurethane yarn and polybutylene terephthalate yarn. There is a method of complex processing of ordinary fibers and elastic yarns using elastic yarns, etc. The fourth method is to use cellulose fiber in the tensionless state to swell the cellulose fibers in the yarn cross-sectional direction to shrink in the yarn length direction. After cross-linking with resin in the fabric state There is a method by dyeing processing such as Slack mercherizing, which gives elasticity and shape stability.Fifth, the smaller the connection point of the warp yarn is, the larger the distance is, and the better elastic fabric is used. There is a way to properly set the fabric structure and specifications.

However, it has been found that the method of expressing the stretch function in cotton fibers has not progressed since the development of covering yarn and core span yarn.

The present invention is a technique related to expressing the stretch function in 100% ombre yarn, and then give the yarn a morphological change by fixing the morphological change by changing the crystal structure of the cotton yarn as nanotechnology. .

An object of the present invention is to provide good stretch functionality to 100% ombre yarn.

Another object of the present invention is to provide a 100% ombre-dyed cotton yarn having excellent stretchability and excellent elasticity as well as excellent thermal insulation, moisture retention, hygroscopicity, and comfort inherent in cotton yarn.

In order to achieve these problems, the present invention is a technique related to expressing the stretch functionality in 100% cotton yarn, and then give a morphological change to the cotton yarn and then change the crystal structure of the cotton yarn as nanotechnology to fix the morphological change to the cotton yarn. It is to express the elastic functional.

Specifically, a twisting process of applying cotton yarn used in the manufacture of cotton knitted fabric to twist one strand of cotton yarn to impart a first morphological change to the cotton yarn, and (ii) a first morphological change through the lower rolling process. It is characterized in that it is manufactured through a series of steps to give a second morphological change to the cotton yarns by twisting while twisting the two or more strands of cotton yarn generated.

In addition, the present invention is to use a cotton yarn in which the first and second morphological changes as described above to refine and reduce the knitted fabric and then chemically treated with potassium hydroxide, aqueous sodium hydroxide solution to fix the shape of the cotton knitted fabric And, it is characterized in that the knitting of the shape-fixed and dyed cotton knitted fabric.

The elastic functional yarn dyed yarn manufactured by the present invention has excellent thermal insulation, moisture retention, hygroscopicity, comfort, etc. inherent in cotton yarn, and at the same time, cotton yarn alone has excellent elasticity.

Hereinafter, the present invention will be described in detail.

The manufacturing method of the elastic functional ombre cotton yarn according to the present invention

(Iii) twisting on one strand of cotton yarn to impart a first morphological change to the cotton yarn:

(Ii) a twisting process of twisting two or more strands of the cotton yarn in which the primary morphological change has occurred through the lower rolling process to impart a second morphological change to the cotton yarns:

(Iii) A knitting process for weaving cotton knitted fabrics using cotton yarns prepared by the above-mentioned staging process:

(Iii) refining and refining the cotton knitted in the knitting process:

(Iii) Form fixing process of fixing the shape of the cotton knitted fabric by chemical treatment of the polished cotton knitted fabric:

(Iii) Processing, drying, dyeing and processing of cotton knitted fabrics which have undergone a shape-fixing process in turn; and

(Iii) characterized in that it comprises a denting process for converting the cotton knitted fabric after the processing process to the cotton yarn state again.

The present invention is first subjected to the twisting process to impart a first morphological change to the cotton yarn by applying twist to the first strand of cotton yarn, and then the two or more strands of the cotton yarn in which the first morphological change occurred through the lower rolling process. Cotton yarns to be used in the manufacture of cotton knitted fabrics are prepared by a twisting process while applying twisting to give a second morphological change to the cotton yarns.

In this case, in each of the lower and upper stages, the twist yarns of 300 to 3,500 TPM (Twist Per Meter) are given to the cotton yarn, and the total number of the twists applied in the lower and upper stages is 800 to 4,500 TPM. It is more preferable for the elasticity improvement of the dyeing yarn.

At this time, the twist number of the lower edge is the sum of the twist number and additionally the twist number that is given when the yarn is manufactured.

The cotton yarn, which was combined and given a morphological change, was not found to have a big problem even when preparing and knitting, similar to the preparation and knitting process of general cotton fibers.

Subsequently, the cotton yarn manufactured by the above-mentioned step is subjected to a knitting process to assemble a cotton knitted fabric, and then, a refined cotton knitted fabric is manufactured through a scouring process of refining and reducing the knitted cotton knitted in the knitting process.

Subsequently, through the shape fixing process of fixing the shape of the cotton knitted fabric by chemical treatment of the polished cotton knitted fabric, the morphological changes caused by twisting on the cotton knitted fabric are fixed.

Chemical treatment for fixing the shape of the cotton knitted fabric can be carried out by processing the cotton knitted fabric with potassium hydroxide, sodium hydroxide or liquid ammonia, etc. The type of chemical used is not particularly limited.

At this time, the treatment concentration should be fixed to the shape of the cotton knitted fabric given a morphological change by twisting. It was found that the change was fixed, but it was also found that it was more important to make decisions based on the number of cotton yarns, the size of the stretchable function, and the shape-fixing environment, rather than being limited to concentrations in this range.

In general, it is known that the crystal structure of cellulose fibers such as cotton fibers can be largely divided into four types. Natural celluloses such as cotton and hemp include cellulose crystal structure I, regenerated cellulose such as rayon, polynosic and cupra, and refined cellulose and mecerized cotton of natural cellulose, cellulose crystal structure II and cellulose. When cellulose crystal structure III, high temperature treatment in a polar solvent such as glycerin at high temperature it is known that cellulose crystal structure IV is obtained. In connection with the conversion to cellulose crystal structure II or cellulose crystal structure III, it is speculated that the shape of the cotton fiber is fixed.

Then, after the process of drying, dyeing, and processing the cotton knitted fabrics which have undergone the shape fixing process, the elastic functional yarn-dyed cotton yarn is subjected to a denting process that unwinds the processed cotton knitted fabrics and converts them into cotton yarns. Manufacture.

The drying, dyeing, and higher-order processing processes after the crystal structure conversion of cotton were possible without the difference between the processing processes of general cotton knitted fabrics.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the protection scope of the present invention is not limited only to the following examples.

Example  One

The cotton yarn 40's were made after twisting with 800 TPM of twisted yarn (lower lead), and after twisting the two twisted yarns (twisted) as described above, the twisted yarn of 1000 TPM was twisted and then rolled. The knitted yarn was used to knit the knitted fabric.

The knitted cotton knitted fabric was passed in the same manner as in the refining and shrinking process of the normal cotton knitted fabric, and then fixed at a room temperature (25 ° C.) in a sodium hydroxide aqueous solution at 24 ° Be 'for 10 minutes to fix the shape of the cotton yarn formed by twisting. After that, washed with formic acid, washed, dried, and dyed CPB as a high-temperature reactive dye, dried and then finally prepared a dyed cotton yarn.

The stretchability of the prepared yarns was evaluated by the stretch rate. The evaluation method used was KS K 0508 method and the results are shown in Table 1.

Example  2

The cotton yarn 40's were fabricated with twisted (lower lead) of 1,000 TPM, and then twisted. After twisting the two twisted yarns as described above, the twisted yarn (1,500 TPM) was twisted and then rolled. The knitted yarn was used to knit the knitted fabric.

The knitted cotton knitted fabric was passed in the same manner as in the refining and shrinking process of the normal cotton knitted fabric, and then fixed in the form of a twisted yarn formed by twisting the treated cotton at 28 ° Be 'for 10 minutes at room temperature (25 ° C). After that, washed with formic acid, washed, dried, and dyed CPB as a high-temperature reactive dye, dried and then finally prepared a dyed cotton yarn.

The stretchability of the prepared yarns was evaluated by the stretch rate. The evaluation method used was KS K 0508 method and the results are shown in Table 1.

Example  3

100's cotton yarn was fabricated with twisted (lower lead) of 1,500 TPM and then twisted, and the twisted (lower lead) twisted two yarns were treated as described above, followed by twisting (upper lead) of 1,500 TPM. The knitted yarn was used to knit the knitted fabric.

After passing the knitted cotton knitted fabric in the same manner as the refining and shrinking process of the normal cotton knitted fabric, the shape of the cotton yarn formed by twisting was treated in a sodium hydroxide aqueous solution at 28 ° Be 'for 10 minutes at room temperature (25 ℃). Then, washed with formic acid, washed, dried, CPB stained with a high-temperature reactive dye, dried and then dented to prepare a yarn dyed finally.

The stretchability of the prepared yarns was evaluated by the stretch rate. The evaluation method used was KS K 0508 method and the results are shown in Table 1.

Comparative Example  One

Two coma cotton yarn 40's were combined and then used to knit the knitted fabric.

The knitted cotton knitted fabric was passed in the same manner as in the refining and shrinking process of the normal cotton knitted fabric, and the shape of the cotton yarn formed by twisting was fixed by treating it at room temperature (25 ° C.) for 10 minutes in an aqueous sodium hydroxide solution at 28 ° Be '. After that, washed with formic acid, washed, dried, and dyed CPB as a high-temperature reactive dye, dried and then finally prepared a dyed cotton yarn.

The stretchability of the prepared yarns was evaluated by the stretch rate. The evaluation method used was KS K 0508 method and the results are shown in Table 1.

Comparative Example  2

The cotton yarn 40's were made after twisting with 400 TPM of twisted (lower lead), and the two twisted yarns treated as described above were spun together, and then twisted and twisted again with 300 TPM. The cotton yarn thus made was knitted.

The woven cotton fabric was passed in the same manner as in the refining and shrinking process of the normal cotton knitted fabric, and then fixed in the form of twisted cotton yarn formed by twisting the treated cotton at 10 ° C (25 ° C) for 10 minutes in an aqueous sodium hydroxide solution at 24 ° Be '. After that, washed with formic acid, washed, dried, and dyed CPB as a high-temperature reactive dye, dried and then finally prepared a dyed cotton yarn.

The stretchability of the prepared yarns was evaluated by the stretch rate. The evaluation method used was KS K 0508 method and the results are shown in Table 1.

New growth rate evaluation result division Expansion rate (%) Example 1 30 Example 2 38 Example 3 51 Comparative Example 1 0.5 Comparative Example 2 6

In general, when the stretch rate of cotton fabric is more than 30, it is evaluated as having a stretch function.

Claims (3)

(Iii) twisting on one strand of cotton yarn to impart a first morphological change to the cotton yarn:
(Ii) a twisting process of twisting two or more strands of the cotton yarn in which the primary morphological change has occurred through the lower rolling process to impart a second morphological change to the cotton yarns:
(Iii) A knitting process for weaving cotton knitted fabrics using cotton yarns prepared by the above-mentioned staging process:
(Iii) refining and refining the cotton knitted in the knitting process:
(Iii) Form fixing process of fixing the shape of the cotton knitted fabric by chemical treatment of the polished cotton knitted fabric:
(Iii) Processing, drying, dyeing and processing of cotton knitted fabrics which have undergone a shape-fixing process in turn; and
(Iii) a method of manufacturing a stretch functional yarn dyed cotton yarn comprising a dipping process for releasing the cotton fabric having undergone the processing step and converting the cotton fabric to a cotton yarn state. The method of claim 1, wherein the twist number in each of the lower and upper stages is 300 to 3,500 TPM. The method of claim 1, wherein the total number of twists provided in the lower and upper stages is 800 to 4,500 TPM.