KR102090390B1 - Combined filament polyester yarn and ventilating fabric having non see-through property - Google Patents

Abstract

The present invention relates to a polyester-based blended yarn, and more specifically, it is excellent in uniformity, elongation, and strength, so it is excellent in weaving and knitting, and has excellent elution performance against alkali, and is very suitable for breathable fabrics and simultaneously for other fibers. It relates to a non-invasive ventilation fabric implemented through the polyester-based mixed yarn yarn that can minimize the alkali invasion, and impart anti-invasive properties to the fabric after imparting breathability.

Description

Combined filament polyester yarn and ventilating fabric having non see-through property}

The present invention relates to a polyester-based blended yarn, and more specifically, it is excellent in uniformity, elongation, and strength, so it is excellent in weaving and knitting, and has excellent elution performance against alkali, and is very suitable for breathable fabrics and simultaneously for other fibers. It relates to a non-invasive ventilation fabric implemented through the polyester-based mixed yarn yarn that can minimize the alkali invasion, and impart anti-invasive properties to the fabric after imparting breathability.

The water-soluble / water-soluble fiber has been conventionally used as an embroidery yarn material or as a composite spinning material for expressing a new look or feel in general fabrics or knitted fabrics, and in recent years, its use has been diversified. In particular, as the demand for functional products for sports and casual apparel is expanding, the demand for fabrics that maximize breathability in summer is increasing.

In order to manufacture these breathable fabrics, attempts were made to empty the yarns at random during picking and weft picking, but the blanks cannot be maintained during the refining and shrinking of fabrics, so voids are not maintained on the final fabric. There was a problem that could not be. In particular, it is difficult to obtain more expected effects on stretchable fabrics such as latent winding yarns and SPAN covering yarns. For this reason, attempts have been made to effectively provide voids by arranging water-soluble fibers or water-soluble fibers at regular intervals in tissue as a method of imparting breathability to fabrics and removing them during fabric processing.

However, when the water-soluble or water-soluble fiber is removed from the fabric implemented by arranging water-soluble fibers or water-soluble fibers at regular intervals in the tissue to impart breathability to the knitted fabric, fabric defects occur due to the nose falling out of the removed parts. There was a problem.

In addition, in order to impart breathability to the fabric tissue, water-soluble fibers such as polyvinyl alcohol fibers are arranged at regular intervals within the tissue to realize fabric, and then there have been attempts to impart breathability to the fabric tissue by eluting the water-soluble fibers. The fiber has a problem in that some fibers are dissolved in the refining process of the fabric before the elution process, and accordingly, the movement of adjacent fibers occurs, causing the stripe wire to collapse and the ventilation effect is destroyed. In addition, SLIP is likely to occur in the oblique or weft direction due to the excessive vibration action of the continuous refining machine, and there is a problem in that it is difficult to make a morphologically stable fabric as well as a ventilation effect.

In addition, if some of the fibers are dissolved through the above attempt to impart breathability to the fabric, a gap between yarns is generated in the fabric portion where the melted fiber is disposed, and the spaced gap increases the non-invasiveness of the fabric. There was a problem that makes it difficult to develop into clothing.

Therefore, even if it is embodied in a knitted fabric or a fabric tissue, while maintaining the shape and texture of the fabric before the weight loss process, the quality deterioration due to the weight loss process of the fibers forming the fabric is prevented by elution after the elution, and the desired breathability is imparted. There is an urgent need to develop a fabric that prevents glare caused by imparting breathability and a yarn that can easily implement such fabric.

Korean Patent Publication No. 10-2013-0072644

The present invention was devised in view of the above points, and has an object to provide a polyester-based blend yarn having excellent dispersing properties against alkali while having excellent weaving and knitting properties due to excellent uniformity, elongation and strength.

In addition, the present invention smoothly imparts air permeability to the fabric by using the excellent dissolution performance of the honseom yarn according to the present invention, while at the same time minimizing alkali infringement on other fibers constituting the fabric during the alkali elution process, the quality is guaranteed, and ensured air permeability. There is another purpose to provide a non-invasive ventilation fabric that is prevented from the non-invasiveness of the fabric.

In order to solve the above-described problems, the present invention is a core sheath comprising a core comprising a polyester-based component as a fiber-forming component and a first alkali-soluble polyester-based component that surrounds all or part of the outer surface of the core. Type 1 composite fiber; And a second yarn formed of a second alkali-soluble polyester-based component; including, the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based relative to the total weight of the first and second yarns It provides a polyester-based blended yarn having a weight sum of 50 to 90% by weight of the components.

According to an embodiment of the present invention, the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component may each independently have an intrinsic viscosity of 0.8 to 1.0 dℓ / g.

In addition, the honseom yarn may be a spinning honseom formed by spinning the first yarn and the second yarn through a single spinneret.

In addition, each of the first and second yarns may be independently stretched at a stretching ratio of 2.5 to 4.5.

In addition, the total weight of the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component with respect to the total weight of the first and second yarns may be 65 to 80% by weight.

In addition, the first yarn and the second yarn may be provided in a ratio of 1: 8 to 1: 1 in the honseom yarn.

In addition, the fineness of the honseom yarn is 30 to 200 denier, the number of filaments may be 18 to 100.

In addition, the honseom yarn strength is more than 3.5g / de, elongation may be 35 to 45%.

In addition, the mixed yarn can satisfy the dissolution conditions according to the following conditions (1) and (2).

(1) After knitting the honseom yarn alone through a sock knitting machine to 168gage, for a specimen cut by knitting the fabric horizontally and vertically by 5cm × 10cm, 2.0% alkali solution under normal pressure and 98 ℃ temperature condition for 30 minutes. When treated, the dissolution rate of the alkali-soluble polyester component in the blended yarn is 95% or more, and (2) the blended yarn is knitted into 168gage through a sock knitting machine, and then the knitted fabric is cut into horizontal and vertical 5cm × 10cm respectively. The dissolution rate of the alkali-soluble polyester component in the blended yarn is 95% or more when the 3.0 weight% NaOH aqueous solution is treated for 15 minutes under normal pressure and 98 ° C temperature conditions with respect to the specimen.

In addition, the first yarn and the second yarn may be provided in a ratio of 1: 5 to 1: 2 in the honseom yarn.

In addition, the blended yarn may have a uniform level of 0.7 to 1.5%.

In addition, the present invention provides a woven or knitted fabric, including; polyester-based blended yarn according to the present invention.

In addition, the present invention provides a non-invasive ventilation fabric prepared by eluting the alkali-soluble polyester component of the honseom yarn from a woven or knitted fabric including the polyester-based honseom yarn according to the present invention.

According to the present invention, the polyester-based blended yarn is excellent in uniformity, elongation, and strength, and is excellent in weaving and knitting properties, but also excellent in elution performance against alkali, and thus is very suitable for breathable fabrics. In addition, it is excellent in elution, and it is possible to minimize alkali invasion to other fibers used together when manufacturing the fabric. Furthermore, even if imparting breathability to the fabric through elution, it is possible to prevent non-invasiveness of the fabric, so it can be widely applied to non-invasive ventilation fabrics.

1 is a schematic cross-sectional view of a honseom yarn according to an embodiment of the present invention.
2 and 3 are photographs of various fabrics using honseom yarn according to an embodiment of the present invention, specifically fabricated with fabrics of different kinds of yarns, and fabrics in which the alkali-soluble polyester component is eluted Show a picture.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

Referring to Figure 1, the polyester-based honseom yarn 100 according to the present invention is formed including the first yarn 10 and second yarn 20, which are core-sheath composite fibers, the core sheath composite fibers Includes a core portion 11 comprising a polyester-based component as a fiber-forming component, and a first portion 12 which is a first alkali-soluble polyester-based component surrounding all or part of the outer surface of the core portion 11, The second yarn 20 is formed of a second alkali-soluble polyester-based component.

The honseom yarn 100 including the first yarn 10 and the second yarn 20 is embodied with different types of yarn and fabric, and then the second yarn 20 is eluted, so that the second yarn 20 occupies the volume. A gap in the fabric is generated, and the gap can easily impart breathability to the fabric. At this time, the core portion 11 of the first yarn 10 that remains even after elution performs a function of preventing non-invasiveness due to a gap occurring in the fabric, and can prevent a swelling phenomenon when the fabric is knitted.

On the other hand, the first yarn 10 is formed of a core-sheath-type composite fiber, which is intended to prevent non-invasiveness and at the same time develop more remarkable ventilation. That is, the first part 12 of the first yarn 10 is an alkali-soluble polyester-based component, and the first part 10 of the first yarn 10 is eluted together in the reduction process of the second yarn 20 to remove the first part 10. One yarn (10) is implemented in fineness with only the core (11) remaining, and after elution of the fineness, the fabric including the first yarn (10) can exhibit better breathability while still exhibiting excellent anti-invasiveness. have.

First, a core sheath type composite fiber, which is the first yarn 10 according to the present invention, will be described. The core sheath-type composite fiber is a core part 11 including a polyester-based component as a fiber-forming component, and a first alkali-soluble polyester-based component 12 surrounding all or part of an outer surface of the core 11 ).

The core portion 11 includes a polyester-based component as a fiber-forming component, and the polyester-based component may be used without limitation when it is a polyester-based component having very low or no solubility in an alkali solution, for example, polyethylene tere Phthalate. The polyester-based component may preferably have an intrinsic viscosity of 0.6 to 0.7 dℓ / g.

In addition, the second portion 12 is formed to partially or entirely surround the outer surface of the core portion 11, and is formed of a first alkali-soluble polyester-based component. The first alkali-soluble polyester-based component may be used without limitation in the case of a polyester-based component known to be soluble in an alkali solution, for example, an aliphatic polycarboxylic acid having 4 to 12 carbon atoms, or a metal salt of sulfonic acid. It may be a polyester modified with the same acid component or a known diol component such as dipolyethylene glycol.

In addition, the first alkali-soluble polyester-based component may have an intrinsic viscosity of 0.8 to 1.0 dℓ / g, and more preferably 0.9 to 1.0 mm 2 / g. If the intrinsic viscosity is less than 0.8㎗ / g, there is a problem in that the easiness of spinning due to frequent occurrence of trimming is reduced due to a decrease in the mechanical strength of the fiber in the spinning process, and it is difficult to uniformly dissolve due to excessive elution, or the cost of compound spinning It may cause alkali infringement of the sea component polyester. In addition, when the intrinsic viscosity exceeds 1.0 Pa / g, the spinning workability is good due to the high mechanical strength, but the alkali elution is remarkably lowered, which may lead to problems such as an increase in the time required for the reduction process and uneven elution.

In the core-sheath-type composite fiber, the core portion 11 and the core portion 12 may be properly adjusted in weight ratio in consideration of the content of the second yarn 20 and the numerical range of Equation 1, which will be described later, preferably the core portion. And chobu may be implemented to have a weight ratio of 1: 9 to 7: 3, more preferably 2: 8 to 5: 5. If the core portion and the core portion are further provided to exceed the weight ratio of 7: 3, the spaced apart gaps generated after the elution of the core portion are reduced, and thus it may be difficult to provide effective ventilation. In addition, if the core portion and the initial portion are provided with less core portions in a weight ratio of less than 1: 9, the fineness of the core portion may be small, and thus may not sufficiently express the anti-invasive role according to?.

Further, the core sheath-type composite fiber may preferably have a fineness of 20 to 100 denier, but the fineness of the core-sheath composite fiber may be appropriately changed in consideration of a desired degree of breathability and the like.

Next, the second yarn 20 is formed of a second alkali-soluble polyester-based component. The second yarn 20 is a yarn that is melted and removed as the fabric implemented including the mixed yarn 100 is subjected to a reduction process, and the volume occupied by the second yarn 20 in the fabric functions as a flow path of the fabric. By doing so, breathability can be imparted to the fabric.

The second yarn 20 is formed of a second alkali-soluble polyester-based component, and in the case of a polyester-based component known to be soluble in an alkali solution, it can be used without limitation, for example, an aliphatic having 4 to 12 carbons. It may be a polyester modified with an acid component such as a polyvalent carboxylic acid, a metal salt of sulfonic acid, or a known diol component such as dipolyethylene glycol. In addition, the second alkali-soluble polyester-based component may have an intrinsic viscosity of 0.8 to 1.0 dℓ / g, and more preferably 0.9 to 1.0 mm 2 / g. If the intrinsic viscosity is less than 0.8㎗ / g, there is a problem in that the easiness of spinning due to frequent occurrence of trimming is reduced due to a decrease in the mechanical strength of the fiber in the spinning process, and it is difficult to uniformly dissolve due to excessive elution, or the cost of compound spinning It may cause alkali infringement of the sea component polyester. In addition, when the intrinsic viscosity exceeds 1.0 Pa / g, the spinning workability is good due to the high mechanical strength, but the alkali elution is remarkably lowered, which may lead to problems such as an increase in the time required for the reduction process and uneven elution.

The second alkali-soluble polyester-based component may be of the same type as the first alkali-soluble polyester component, but is not limited thereto and may be provided with different types.

The honseom yarn 100 implemented by including the first yarn 10 and the second yarn 20 described above uses the first alkali with respect to the total weight of the first yarn 10 and the second yarn 20 The weight sum of the sex-based polyester component and the second alkali-soluble polyester-based component is 50 to 90% by weight, preferably 65 to 80% by weight, through which non-invasiveness and breathability can be simultaneously expressed. Thereafter, after knitting / weaving with the fabric, the mechanical shape can be maintained intact by expressing sufficient mechanical strength even after the reduction process. If the total weight of the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component relative to the total weight of the first yarn 10 and the second yarn 20 is less than 50% by weight, elution As the remaining depth increases afterwards, voids in the fabric are not sufficiently generated, and thus, the expression of breathability may be insufficient. In addition, if it exceeds 90% by weight, the permeability of the fabric is significantly increased due to a decrease in the weight of the core portion of the first yarn 10 that is excellent in breathability but remains, and thus it may be difficult to deploy the fabric for clothing use. . In addition, since the strength of the remaining first yarn 10 is lowered, the thread trimming may be frequent, which may deteriorate the shape or quality of the fabric, and in particular, the nose blowing phenomenon of knitted fabrics may frequently occur.

The honseom yarn 100 may have a fineness of 30 to 200 denier and 18 to 100 filaments. If the fineness is less than 30 denier, frequent trimming may occur when weaving or knitting, and there is a fear that the air gap in the fabric is finely formed after elution, thereby significantly deteriorating air permeability. In addition, if the fineness exceeds 200 denier, the air gap in the fabric is largely formed after elution, but the air permeability may be excellent, but the non-invasiveness may increase significantly, making it difficult for the fabric to develop into clothing.

In addition, according to an embodiment of the present invention, the first yarn 10 and the second yarn 20 in the honseom yarn 100 may be provided in a number ratio of 1: 8 to 1: 1, more preferably May be provided at a ratio of 1: 5 to 1: 2. If the number of the second yarns in the honseom yarn is provided in a number of times less than the first yarn compared to the first yarn, there is a fear that it is difficult to provide effective voids to the fabric because the content of the core remaining after elution is too high. In addition, if the number of the second yarns in the honseom yarn is provided in a number exceeding eight times as compared to the first yarn, the content of the remaining core portion after elution is insufficient, hindering anti-invasiveness, and in particular, the nose blowing phenomenon of knitted fabrics. There is a risk of causing.

Meanwhile, the first yarn 10 and the second yarn 20 may each independently be stretched at a stretching ratio of 2.5 to 4.5, more preferably at a stretching ratio of 3.0 to 3.8, and preferably the first yarn 10 ) And the stretching ratio of the second yarn 20 may be the same. In this case, after the first yarn 10 and the second yarn 20 are manufactured by spinning the first yarn 10 and the second yarn 20, the first yarn 10 and the second yarn 20 are provided with the values of Equation 1 according to the present invention. It may be implemented by being mixed to satisfy, in this case, it may be stretched to have the stretching ratio while being radiated to the first yarn 10 and the second yarn 20, respectively. Alternatively, the mixed yarn yarn 100 may be a mixed yarn yarn produced by simultaneously radiating the first yarn 10 and the second yarn 20 through a single spinneret. It may be stretched to have. If the draw ratio is less than 2.5 times, the uniformity of elution cannot be obtained due to poor spinning performance due to poor fiber uniformity and poor chemical resistance to alkali. In addition, if the draw ratio is 4.5 times or more, the nature of the first alkali-soluble polyester component and the second alkali-soluble polyester component may cause thread breakage during stretching, resulting in very poor spinning workability, and also alkali dissolution by over-stretching. The speed can be greatly reduced and it may be difficult to set the fabric dyeing processing conditions.

On the other hand, the spinning blended yarn has the advantage of simplifying the manufacturing process and reducing manufacturing time and cost in case the individual yarn is mixed. The spinneret used when the blended yarn 100 is a spinning blended yarn is a first spinning nozzle capable of discharging the first yarn 10, which is a core-sheath composite fiber, and a second yarn 20 capable of discharging the second yarn 20. The two-radiation nozzle may be provided in a single custody, and the first radiation nozzle may have a double-sided cross-section, but is not limited thereto.

In addition, the honseom yarn 100 provided with the first yarn 10 and the second yarn 20 stretched under the above-described conditions may have a uniform disinfection system of 0.7 to 1.5%, and in particular, the uniform system when elongated when irradiated with a spun yarn. Can be more excellent. When the uniformity of the honseom yarn is not uniform, it is highly likely to cause fabric defects when weaving due to frequent trimming and difficulty in obtaining a uniform honseom. In addition, it is difficult to uniformly reduce the amount of the alkali-soluble polyester component that does not elute under predetermined conditions, and accordingly, when trying to reduce the total amount of the alkali-soluble polyester component, an extended elution time or severe reduction conditions Therefore, there may be a possibility of deep alkali invasion.

In addition, the honseom yarn 100 may have a strength of 3.5 g / de or more, more preferably 3.5 to 4.5 g / de, and elongation of 35 to 45%. When these strength conditions are satisfied, weaving properties, knitting properties, and ease of processing for fabrics are significantly increased, and thread trimming in fabric manufacturing processes and processing processes can be significantly prevented. In addition, when the elongation condition is satisfied, anti-trimming property and elution property may be greatly improved. If the strength of the honseom yarn is less than 3.5 g / de, when the processing process is performed, thread trimming frequently occurs, resulting in a decrease in production efficiency and a decrease in the quality of manufactured products. In addition, if the elongation of the honseom yarn is less than 35%, the dissolution rate is lowered, and there may be a second part or a second part of the remaining first yarn that is not reduced when treating the alkali solution, and there is a fear that breathability is significantly reduced. have. In addition, there may be a problem that the spinning operability is poor due to overstretching. In addition, when the elongation exceeds 45%, the thread trimming may be increased when weaving due to the poor uniformity due to incomplete stretching, and the core of the first yarn may not be sufficiently stretched, which may lead to poor dyeing and poor spinning operability.

The blended yarn 100 may satisfy the dissolution conditions according to the following conditions (1) and (2), through which the alkali-soluble polyester component can be more easily removed when it is reduced on the fabric, through which It has the advantage of easily implementing the air permeability and preventing alkali invasion of different types of yarns constituting the fabric.

(1) After knitting the honseom yarn alone through a sock knitting machine to 168gage, for a specimen cut by knitting the fabric horizontally and vertically by 5cm × 10cm, 2.0% alkali solution under normal pressure and 98 ℃ temperature condition for 30 minutes. During treatment, the dissolution rate of the alkali-soluble polyester component in the honseom yarn is 95% or higher, (2) the honseom yarn is knitted to 168gage through a sock knitting machine, and then the knitted fabric is cut into horizontal and vertical 5cm × 10cm respectively. The dissolution rate of the alkali-soluble polyester component in the honseom yarn is 95% or more when the 3.0 wt% NaOH aqueous solution is treated for 15 minutes under normal pressure and 98 ° C temperature conditions.

If the conditions (1) and (2) above are unsatisfactory, it may elute for a long time or increase the concentration of the alkali solution for complete elution of the alkali-soluble polyester-based component. In this case, the core or fabric of the first company The heterogeneous yarns constituting can be significantly increased the fear of invasion of alkali.

In addition, if the reduction process is performed under limited conditions to prevent this, the removal of the alkali-soluble polyester-based component is not smooth, and the desired level of breathability can be imparted to the fabric due to the remaining alkali-soluble polyester-based component. There is no problem.

The polyester-based blended yarn 100 is the first yarn 10 and the second yarn 20 is a spinning yarn formed by spinning through a single spinneret, or the first yarn 10 and the second yarn ( 20) may be mixed yarns that are independently spun and then spun through a conventional splicing method.

Hereinafter, an example of a method for manufacturing a spinning blended yarn will be described above, where the alkali-soluble polyester resin and the polyester resin may be injected into the composite spinning facility at a desired weight ratio to melt spinning at 270 ° C to 290 ° C. At this time, the spinneret of the composite spinning facility may include a double nozzle through which the composite fibers of the first yarn 10 are spun, and a single nozzle through which the second yarn 20 is spun, and the strands of the first yarn 10 The number of nozzles may be appropriately designed in consideration of the number and the number of strands of the second yarn 20. After being spun through the composite spinning facility, the first winding is carried out at 70 to 90 ℃ at a speed of 1000 to 2000mpm (m / min) through the first Godet roller, and 3500 to 4700 mpm (m / min) through the second Godet roller. The second winding can be stretched at 100 to 140 ° C as a speed, and the speed of the first Godet roller and the second Godet roller can be appropriately changed according to a desired stretching ratio. The honseom yarn 100 produced through this can perform known sand processing according to the purpose thereafter, and the present invention is not particularly limited. In addition, other additional processes performed in the conventional spinning process may be further performed in addition to those described for the spinning process, and the detailed description of the present invention will be omitted.

The present invention can implement the fabric by including the polyester-based blended yarn 100 described above. The fabric is meant to include all fabrics or knitted fabrics. Specifically, the fabric may be a woven fabric or a knitted fabric using polyester-based blended yarn 100 as one or more of warp and weft yarns. At this time, the weaving may be made by any one method selected from the group consisting of plain weave, twill weave, male weave and double weave. However, it is not limited to the description of the fabric tissue, and the density of the warp yarns in weaving is not particularly limited. In addition, the knitting may be by a method of knitting or warp knitting, and the specific method of knitting and warp knitting may be by a conventional knitting or warp knitting method.

In addition, the above-described fabric may be embodied as a non-invasive ventilation fabric by dissolving the alkali-soluble polyester component of the horn island yarn 100 provided as a yarn in the fabric. At this time, the elution is preferably performed prior to dyeing after washing, refining and bleaching of the fabric, but is not limited thereto.

The present invention will be described in more detail through the following examples, but the following examples are not intended to limit the scope of the present invention, which should be interpreted to help understand the present invention.

<Example 1>

The alkali-soluble polyester-based component (Toray Chemical, ESP) having an intrinsic viscosity of 0.95 dl / g and PET having an intrinsic viscosity of 0.65 dl / g are added, but the alkali-soluble polyester-based component is weighted by the first and second yarns. It was spun through a composite spinneret with six first spinning nozzles, which are double spinning nozzles, and 18 second spinning nozzles, which are single spinning nozzles, so as to be 70% by weight of the total. At this time, the spinning temperature was 285 ° C and melt spinning, and the first winding under 85 ° C at a speed of 1300mpm (m / min) through a first Godet roller to make the draw ratio equal to 3.30 at the same time as spinning, and through a second Godder roller. After drawing and stretching a second winding under 125 ° C at a speed of 4100 mpm (m / min), a polyester-based blended yarn as shown in Table 1 below was prepared. At this time, the total fineness of the honseom yarn was 75 denier, the number of filaments was 24, the number of the first yarn and the second yarn was 6:18, and the weight ratio of the core and the first portion in the first yarn was 22.5: 13.1.

<Examples 2 to 19>

Prepared in the same manner as in Example 1, but by changing the content of the alkali-soluble polyester-based component contained in the honseom yarn or the draw ratio is changed as shown in Table 1 and Table 2, honseom yarn shown in Table 1 and Table 2 Was prepared.

<Experimental Example 1>

The following physical properties were evaluated for the examples and are shown in Tables 1 and 2 below.

1. Evaluation of dissolution properties

In order to evaluate the dissolution properties of the alkali-soluble polyester component in the blended yarn, a knitted fabric was prepared at 168 gage by putting the blended yarn alone into a sock knitting machine. The following elution conditions (1) and elution conditions (2) were performed on the specimens cut into 5 cm × 10 cm to evaluate the dissolution properties of the alkali-soluble polyester component according to the following formula.

* Condition (1): The specimen was treated with 2.0% by weight alkali solution under normal pressure (1atm) and 98 ℃ temperature condition for 30 minutes.

* Condition (2): Treat the specimen with 3.0% by weight alkali solution under normal pressure (1atm) and 98 ℃ temperature condition for 15 minutes

[expression]

When 100% elution is completed under the above conditions, it can be determined that elution is completed under the conditions of reducing / eluting the normal fabric.

2. Radiation yield

During the spinning process, it is measured as the number of trimmings during 24 hours of operation per machine (hereinafter referred to as M / C) .When trimming is 4 or more times in 24 hours, △, when trimming is 2 or 3 times, as ◎ when trimming is less than 1 time Notation.

3. Strength and elongation

The strength and elongation were measured by applying a speed of 200 cm / min and a gripping distance of 50 cm using an automatic tensile tester (Textechno). Strength and elongation is the value (g / de) obtained by dividing the load applied when the fiber is stretched until it is cut by denier (de / de) (g / de) as the strength, and the value of the initial length relative to the length (%) ) As Shinto.

4. Evaluation of uniformity system

The uniformity was measured by using Uster Technologies' model USTER TESTER 6-C800 instrument as the average value of the uniformity per 100 m.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 First company (composite fiber) Fineness (de ') 35.6 30 27.2 25.5 21.6 38.44 41.25 45.75 49.7 The number of strands 6 6 6 6 6 6 6 6 6 Core weight ratio 22.5: 13.1 15:15 11.3: 14.9 9:
16.5 3.8:
17.8 26.25:
12.19 30:
11.25 36:
9.75 41.3: 8.4 2nd party ESP Fineness (de ') 39.4 45 47.8 49.5 53.4 36.56 33.75 29.25 25.3 The number of strands 18 18 18 18 18 18 18 18 18 Honseomsa Temple Total fineness
(de ') 75 75 75 75 75 75 75 75 75 The number of strands 24 24 24 24 24 24 24 24 24 First Firm: Second Firm Repair Fee 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 The content of the first alkali-soluble component + the content of the second alkaline-soluble component (% by weight) 70 80 85 88 95 65 60 52 45 Draw ratio 3.35 3.20 3.12 3.05 2.88 3.45 3.58 3.69 3.80 Emission yield (1MC / 24hr) ◎ ◎ ○ ○ Δ ◎ ◎ ◎ ◎ Strength (g / de ') 3.92 3.77 3.60 3.52 3.24 4.03 4.19 4.30 4.45 Elongation (%) 39.12 41.38 43.21 44.68 48.92 38.02 36.03 33.74 31.31 Uniformity system (%) 0.82 0.71 0.99 1.12 1.69 0.82 0.73 0.74 0.69 Condition (1) Dissolution 100 100 100 100 100 100 93 86 78 Condition (2) Dissolution 100 100 100 100 100 100 98 95 84

Example 10 Example 11 Example 12 Example 13 Example 14 Example 15 Example 16 Example 17 Example 18 First company (composite fiber) Fineness (de ') 30 30 30 30 30 30 30 30 30 The number of strands 6 6 6 6 6 6 6 6 6 Core weight ratio 15:15 15:15 15:15 15:15 15:15 15:15 15:15 15:15 15:15 2nd party ESP Fineness (de ') 45 45 45 45 45 45 45 45 45 The number of strands 18 18 18 18 18 18 18 18 18 Honseomsa Temple Total fineness
(de ') 75 75 75 75 75 75 75 75 75 The number of strands 24 24 24 24 24 24 24 24 24 First Firm: Second Firm Repair Fee 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 1: 3 The content of the first alkali-soluble component + the content of the second alkaline-soluble component (% by weight) 80 80 80 80 80 80 80 80 80 Draw ratio 3.55 3.80 3.90 4.20 4.40 4.65 2.90 2.55 2.40 Emission yield (1MC / 24hr) ◎ ◎ ◎ ○ ○ Δ ○ ○ Δ Strength (g / de ') 3.90 4.02 4.11 4.25 4.31 4.45 3.47 3.14 3.05 Elongation (%) 37.89 35.85 33.80 31.05 30.03 28.98 46.95 51.02 53.86 Uniformity system (%) 0.82 0.84 1.03 1.15 1.22 1.54 2.01 2.47 2.91 Condition (1) Dissolution 98 92 84 74 68 59 100 100 100 Condition (2) Dissolution 100 100 95 85 78 69 100 100 100

As can be seen from Table 1 and Table 2,

Examples 1 to 4 and 6 to 8 belonging to the preferred range of 50 to 90% by weight of the total content of the first alkali-soluble component and the second alkali-soluble component are more radioactive than Example 5, which is out of this. This was excellent, and it was confirmed that the dissolution property of the alkali-soluble component was superior to that of Example 9.

In addition, in the case of Examples 10 to 14, Examples 16 and 17, which have a stretching ratio of the blended yarn of 2.5 to 4.5, which is a preferred range of the present invention, the spinning yield, elution property, and uniformity are excellent compared to Example 15, and Examples In preparation for 18, it can be seen that the spinning yield and the leveling agent are excellent.

<Comparative Example 1>

It was manufactured in the same manner as in Example 1, but instead of the second spinning nozzle, the spinning was conducted through a spinneret further equipped with the first spinning nozzle at the same number, and the manufactured yarn was a composite fiber that is the first yarn without a second yarn. The total fineness of Roman was 75 denier, the number of filaments was 24, and the weight ratio of the core to the core was 3: 7 in one strand of composite fiber.

<Experimental Example 2>

The properties of the yarns according to Example 1 and Comparative Example 1 were evaluated and are shown in Table 3.

1. Evaluation of dissolution properties

It evaluated by the same method as Experimental Example 1.

2. Evaluation of ventilation

The air permeability of the fabric was measured in accordance with the test standards of KS K 0570 (2006) for knitted fabrics knitted with 168 gage through a sock knitting machine alone. As a result of the measurement, the air permeability of Comparative Example 1 was shown as a relative value based on the air permeability of knitted fabric of Example 1.

3. Non-invasiveness evaluation

After the elution process was performed under the same conditions as in the dissolution evaluation (1) of Experimental Example 1 for the knitted fabric knitted with 168 gage through a sock knitting machine alone, a T-shirt of the same design was produced from the fabric. After the experimenter, 10 experts evaluated whether the appearance of the bare skin occurred after wearing it so that the t-shirt touched the bare skin.

Example 1 Comparative Example 1 1st alkali-soluble component + 2nd alkali-soluble component (total weight) 70 70 Condition (1) Dissolution 100 86 Condition (2) Dissolution 100 97 Air permeability (%) 100 68 Whether it is reflected × ×

As can be seen from Table 3,

Both of Example 1 and Comparative Example 1 included the alkali-soluble component and the fiber-forming component in the same amount, but in Comparative Example 1, it was confirmed that the air permeability was significantly lower than that of Example 1 because no second yarn was provided. have. In addition, it can be seen that Comparative Example 1 was also significantly poorer than Example 1 in dissolution properties.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the spirit of the present invention may add elements within the scope of the same spirit. However, other embodiments may be easily proposed by changing, deleting, adding, or the like, but this will also be considered to be within the scope of the present invention.

Claims (14)

A core yarn comprising a polyester-based component as a fiber-forming component, and a first yarn as a core-sheath-type composite fiber comprising a first portion of a first alkali-soluble polyester-based component surrounding all or part of an outer surface of the core portion; And
And a second yarn formed of a second alkali-soluble polyester-based component.
The total weight of the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component relative to the total weight of the first and second yarns is 60 to 90% by weight, and the strength is at least 3.5 g / de. , Elongation 35-45% polyester blend yarn. According to claim 1,
The first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component are each independently polyester-based blended yarn having an intrinsic viscosity of 0.8 to 1.0 dℓ / g. According to claim 1,
The honseom yarn is a polyester-based honseom yarn is a spinning yarn is formed by spinning the first yarn and the second yarn through a single spinneret. delete According to claim 1,
The first yarn and the second yarn are independently polyester-based blended yarns that are stretched at a stretching ratio of 2.5 to 4.5. According to claim 3,
The total weight of the first alkali-soluble polyester-based component and the second alkali-soluble polyester-based component relative to the total weight of the first and second yarns is 65 to 80% by weight of a polyester-based blended yarn. According to claim 1,
The first and second yarns in the honseom yarn is a polyester-based honseom is provided in a number ratio of 1: 8 ~ 1: 1. According to claim 1,
The fineness of the honseom yarn is 30 ~ 200 denier, the number of filaments is 18 ~ 100 polyester-based honseom. delete According to claim 1,
The blended yarn is a polyester-based blended yarn that satisfies the dissolution conditions according to the following conditions (1) and (2):
(1) After knitting the honseom yarn alone through a sock knitting machine to 168 gage, for a specimen cut into 5 cm x 10 cm horizontally and vertically, the 2.0 wt% NaOH aqueous solution under normal pressure and 98 ° C temperature condition was used for 30 minutes. When the liver is treated, the dissolution rate of the alkali-soluble polyester component in the blended yarn is 95% or more,
(2) After knitting the honseom yarn alone through a sock knitting machine to 168 gage, for a specimen cut into 5 cm x 10 cm horizontally and vertically, the 3.0 wt% NaOH aqueous solution under normal pressure and 98 ° C temperature condition was used for 15 minutes. When the liver is treated, the dissolution rate of the alkali-soluble polyester component in the blended yarn is 95% or more. The method of claim 7,
The first yarn and the second yarn in the honseom yarn is a polyester-based honseom yarn provided in a number ratio of 1: 5 ~ 1: 2 According to claim 1,
The blended yarn is a polyester-based blended yarn having a uniformity of 0.7 to 1.5%. Claims 1 to 3, claim 5 to claim 8, and the polyester-based blended yarn according to any one of claims 10 to 12; including woven or knitted fabric. The polyester-based blended yarn according to any one of claims 1 to 3, 5 to 8 and 10 to 12; alkali-soluble properties of the blended yarn in a woven or knitted fabric including Non-invasive ventilation fabric made by eluting polyester components.

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