KR101823254B1 - Artificial filler and preparing method thereof - Google Patents

Abstract

The present invention provides an artificial filler using C-type hollow short fibers where hollow portions are eluted and a preparing method thereof. The artificial filler according to the present invention can exhibit excellent thermal insulation and ultralight weight by using C-type hollow short fibers where hollow portions are eluted. In addition, since the artificial filler can be mixed with other filling materials having functionality and developed as an additional functional filler, the artificial filler can contribute to the expansion of the market of finished products of padded jackets requiring various functions by diversifying the material.

Description

TECHNICAL FIELD [0001] The present invention relates to an artificial filler and a method for manufacturing the same. BACKGROUND ART ARTIFICIAL FILLER AND PREPARING METHOD THEREOF [

TECHNICAL FIELD The present invention relates to a high-temperature and lightweight artificial filler using C-type hollow short fibers and a method for producing the same.

The most commonly used stuffing material in padding for seongdong is duck and goose down. Down is not only the lightness of the material itself but also the hairs of the so-called barb, which are united with each other and repel each other, resulting in a space containing air, thereby maximizing the warmth. However, it has the disadvantage that supply and demand becomes unstable due to various factors such as animal cruelty, high price and avian influenza. In addition, there are disadvantages in that microorganisms are generated due to residual ingredients in the preservative component, rotting down due to the deterioration thereof, and odor generated when the animal is collected from the animal. Furthermore, since the down material is a natural material, it also has the disadvantage that it is difficult to apply the necessary additional functionality to the post-processing.

The most excellent artificial fillers in terms of thermal insulation in the market are synthetic fiber materials using hollow fibers that mimics the air-containing characteristics of down and airborne hair of polar bears. These synthetic fibers have low hollow ratio, There is a problem that the hollow of the end is liable to be distorted by cutting during the process and that the entire fiber is also crushed by the pressure applied when the crimp is generated. In addition, since the hollow is present as a short fibrous core, the effect of the hollow is inhibited, for example, the channels through which air can move and enter are located at both ends of the fiber, There is no disadvantage.

Also, according to the two necessities that the used synthetic fiber should maintain the filler form and increase the thermal insulation, short fibers of usually 1 to 6 denier are used, which is much larger than the fineness of the bob having a diameter of tens of micro- , It is practically impossible to implement a weight saving aspect or a down touch. And, the general hollow short fiber material for filling material has a disadvantage that the material itself is hydrophobic, but the drying speed is slow because it is not an unshaped cross-sectional shape for quick dryness.

Korean Patent Publication No. 10-2015-0079165 (published on July 20, 2015) Korean Registered Patent No. 10-1487936 (Registered on January 23, 2015) Korean Registered Patent No. 10-1414211 (Registered on June 25, 2014) Korean Registered Patent No. 10-1414206 (Registered on June 25, 2014)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide an artificial filler having high heat retention and lightweight using C-type hollow short fibers and a method for producing the same.

Another object of the present invention is to provide a garment comprising the above-mentioned artificial filler.

According to one embodiment of the present invention, there is provided an artificial filler comprising a C-type hollow short fiber, wherein the C-type hollow short fiber satisfies all of the following conditions (1) to (3) Provided:

(1) C-shaped including slit with open cross-section

(2) The hollow ratio (percentage of the hollow cross-sectional area included in the hollow fiber to the total cross-sectional area of the C-type hollow fiber) is 60% or more

(3) having a length of 21 mm to 75 mm and having 0.7 Denerier / Filament to 12.5 Denerier / Filament

According to another embodiment of the present invention, there is provided a method for producing a hollow fiber yarn, Preparing a C-type hollow staple fiber by performing an elution process on the short fiber type C hollow yarn; And a step of preparing an artificial filler by using the C-type hollow seasoning oil.

According to another embodiment of the present invention, there is provided a garment or padding including the artificial filler.

The artificial filler according to the present invention can exhibit excellent light insulation and light weight by using C-type hollow short fibers eluted from the hollow portion. The artificial filler is mixed with other functional filler materials and developed into an additional functional filler , Which can contribute to expanding the padded finished product market, which requires diverse functionality through material diversification.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description of the invention, It should not be construed as limited.
1 is a flowchart schematically showing a manufacturing process of an artificial filler according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a cross section of a C-type hollow fiber yarn used in manufacturing an artificial filler according to an embodiment of the present invention.
3 is a photograph showing a cross section of a conventional hollow staple fiber.
FIG. 4A is a schematic view of an artificial filler according to an embodiment of the present invention, and FIG. 4B is a perspective view schematically showing a structure of a C-type hollow short fiber included in the artificial filler in FIG. 4A.
Fig. 5 is a photograph showing the hollow region observed at a magnification of 800 when the C type hollow yarn was dyed before bleaching in Example 1. Fig.
FIG. 6A is a photograph of a section after elution of a C-type hollow yarn in Example 1 at an observation magnification of 800, and FIG. 6B is a partial enlarged view of an observation magnification of 1K.

Hereinafter, the present invention will be described in detail in order to facilitate understanding of the present invention.

The terms and words used in the present specification and claims should not be construed in an ordinary or dictionary sense and the inventor can properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.

In the present invention, hollow filler has a much higher void ratio (about 60% by volume or more) than hollow hollow fibers (10 to 15% by volume) in the production of an artificial filler. The present invention is characterized in that the warmth and lightness of the artificial filler are greatly improved by using short C type hollow yarns as short fibers.

Conventional C-type conjugated fibers have been developed only for filamentous filaments, and have not been subjected to a single filamentization process. On the other hand, in the present invention, a down-replacement artificial filler having warmth and light weight at the same time can be manufactured by forming a short fiber through a crimp process on a long fiber and performing an elution process using a sliver or a fiber dyeing machine.

Specifically, the artificial filler according to one embodiment of the present invention includes C-type hollow short fibers.

The C-type hollow short staple fiber is produced through a short fiberization and elution process for the C-type hollow yarn and simultaneously satisfies the following conditions (1) to (3):

(1) C-shaped including slit with open cross-section

(2) the hollow ratio (percentage of the hollow cross-sectional area included in the hollow fiber with respect to the total cross-sectional area of the C-type hollow fiber) is 60% or more, more specifically 60% to 70%

(3) having a length of 21 mm to 75 mm and having 0.7 Denerier / Filament to 12.5 Denerier / Filament

Specifically, the C-type hollow staple fiber is C-shaped including a slit having an open cross-section. Because of this C shape, it is possible to realize a product with a very soft feel compared to apparent denier, and also to form an air-containing and filler bulk (BULKY) property. In addition, since it has an eccentric shape, quick-drying can be performed after washing and sucking, and it is possible to simultaneously exhibit antibacterial and deodorant, which are advantages of synthetic fibers.

In the C-type hollow short staple fiber, the slit may satisfy the following condition (1).

[Equation 1]

20 ° ≤ slit angle (θ) ≤ 30 °

In the artificial filler according to one embodiment of the present invention, the C-type hollow short fibers may have a constant slit angle? Regardless of the hollow ratio. If the slit angle is less than 20, the elution of the C-type hollow short fibers is prolonged, and as a result, there is a risk of elution of the shell portion. If the slit angle exceeds 30 DEG, the circular structure is lost, and the air layer can not be effectively applied to the hollow, resulting in a deterioration in thermal insulation and a decrease in strength.

In addition, the C-type hollow short fiber includes a hollow formed by elution of a usable polyester polymer contained in a C-type hollow fiber, wherein a hollow ratio (including the hollow fiber with respect to the total cross- Of the hollow cross-sectional area) may be at least 60%, more specifically 60% to 70%, and even more specifically 60%, based on the total volume of C-type hollow staple fibers. If the hollow ratio is less than 60%, the warmth and lightweight of the artificial filler may be deteriorated. When the hollow ratio exceeds 70%, there is a fear that the strength is lowered due to the thin structure of the shell portion.

In addition, the C-type hollow short fibers may have a length of 21 mm to 75 mm, and more specifically 51 mm in consideration of compatibility.

The C-type hollow short staple fibers may have a tactile denier of from 0.5 denier to 15 denier, more specifically from 0.7 denier / filament to 3 denier / filament.

The C-type hollow short fibers may include a crimp, and the crimp may have various shapes such as a crown shape and a zigzag shape. Specifically, the C-type hollow short fiber may include a crimp of 3 to 18 ea crimp / inch, and more specifically, a crimp of 7 to 8 ea zigzag crimp / inch. By including the crimp under the above-mentioned conditions, it is possible to improve the bulky property of the short fibers and the morphological stability in mixing with other short fibers for filling.

The C-type hollow short fiber has an eccentric shape in which the distance between the center of the C-shaped hollow fiber cross-section and the center of the hollow cross-section is greater than zero. Specifically, the C-type hollow short fiber may have an eccentric distance defined by the following equation (2).

&Quot; (2) "

1? Eccentric distance (S) x (R2 / R1) < 2.4

In the above formula (2), the eccentric distance S is the distance (占 퐉) between the centers of the hollow cross sections at the center of the cross section of the C type hollow fibers, R1 is the diameter (탆) of the hollow cross-section of the hollow fiber.

If the condition according to Equation (2) is not satisfied, the hollow position of the C-type hollow short fiber having the same hollow ratio (%) moves to the center of the C-type hollow fiber cross section instead of the open slit side of the shell portion There is a possibility that the elongation speed of the hollow portion decreases and / or the elution time is prolonged, thereby prolonging the time of the manufacturing process and causing defective dyeing due to non-uniform elution.

The C-type hollow short staple fiber may include a polyester-based synthetic resin, and more specifically, a polyalkylene terephthalate-based polymer such as polyethylene terephthalate.

The C-type hollow short staple fiber may be a partially stretched yarn (POY), a drawn yarn (SDY), a false twist yarn (DTY), an air texturing yarn (ATY), an edge crimped yarn or a composite yarn .

Meanwhile, the artificial filler may include the C-type hollow short fibers alone, or may further include other short fibers for fillers in an amount of 90% by weight or less based on the total weight of the artificial filler.

The other staple fibers for fillers may include one or more selected from the group consisting of hollow staple fibers, circular staple fibers, light generating staple fibers and polyurethane rubber staple fibers.

The artificial filler having the above-mentioned constitution is characterized by comprising steps (step 1) of shortening the C type hollow yarn into fibers; Preparing a C-type hollow staple fiber by performing an elution process on the short fiberized C-type hollow yarn in the step (step 2); And a step (step 3) of producing an artificial filler by using the C-type short hollow fiber. According to another embodiment of the present invention, there is provided a method of manufacturing the artificial filler.

1 is a flowchart schematically showing a manufacturing process of an artificial filler according to an embodiment of the present invention. FIG. 1 is an illustration for illustrating the present invention, but the present invention is not limited thereto. This will be described in more detail with reference to FIG.

Step 1 for manufacturing an artificial filler according to an embodiment of the present invention is a step of shortening a C type hollow yarn into fibers.

2 is a cross-sectional view schematically showing a cross-section of a C type hollow yarn used for producing the C type hollow short fiber. FIG. 2 is an illustration for illustrating the present invention, but the present invention is not limited thereto.

Referring to FIG. 2, the C-type hollow yarn 10 is composed of a shell portion 100 surrounding an outer shell and an eccentric hollow portion 200. The shell portion 100 includes a polyalkylene terephthalate-based polymer such as polyester-based synthetic resin, specifically, polyethylene terephthalate, and the eccentric hollow portion 200 is made of a usable polyester-based polymer, And a polyalkylene terephthalate-based polymer such as polyethylene terephthalate.

The volume ratio of the shell portion 100 and the eccentric hollow portion 200 constituting the C type hollow yarn 10 may be 30 to 40:60 to 70 and more specifically 40:60 . Accordingly, in the subsequent elution step, the usable polyalkylene terephthalate-based polymer in the eccentric hollow portion is removed, whereby 60% by volume to 70% by volume, more specifically 60% by volume, of the hollow portion is hollowed out and the C- . As a result, it can have a light weight of 60% or more, more specifically 60% to 70%, of the apparent count.

In addition, the hollowness of the C type hollow yarn as described above provides a modified cross section, and as a result, quick drying is possible. As a result, it is possible to exhibit remarkably quick drying property as compared with a filler including hollow yarn of general circular cross section after washing with water and the like.

3 is a photograph showing a cross section of a conventional hollow yarn. As shown in FIG. 3, the hollow yarn of the conventional hollow yarn has a volume of 10% to 15% by volume, and hollows are formed at the both ends of the yarn, so that the convection and the air of the air are bad. As a result, .

The C type hollow fiber yarn may have a thickness of 120D to 450D and 36 to 72 filaments.

The C-type hollow fiber yarn can be pretreated by a method such as padding, stretching, or the like so as to meet the minimum focusing denier 130,000D necessary for monofilament prior to the monofilament process.

Specifically, the C-type hollow fiber yarn can be preprocessed to prepare a C-type fiber produced from long fibers, specifically, long fibers of three deniers are joined to prepare a denier suited to the condition of short fiberizing equipment (crimp). More specifically, a preprocessing process of making 240 d to 6 or more yarn dyneries to make the yarn cone denier of about 1,440, and then preparing the yarn 1440D with the necessary crowded denier for 100 or more cones is performed on the C-type hollow yarn .

In addition, during the crimping process, it is possible to prevent bunching, twisting and loosening of the long fibers in the crimp drawing process in the subsequent crimp process, to prevent the discharge of the usable polyester in the elution process, It is important to set the number of twist of the ply so that it can open without opening. Concretely, the number of strands in the stranding process may be 7T / M to 15T / M, more preferably 10T / M. If the number of twists in the above range per meter is reduced, the bundled fibers can be wrapped without folding in the carding process in which the bundled fibers are formed and the fibers are subsequently processed.

In addition, when stretching, it is possible to perform the stretching process from 1.4 times to 2.5 times. In general, it can be divided into three denier and three denier based on the short fiber of the class of 3Denier / filament. The denier staple fiber has the durability that can maximize the bulkiness that can have a large amount of air, , And three denier staple fibers are advantageous for the production of a soft texture filler. Accordingly, in the present invention, various denier short fibers ranging from three deniers of 0.7 Denier / Filament to 12 denier / filament denier can be obtained in consideration of desired functions and feel.

The monofilization process for the C-type hollow yarn pretreated as described above can be performed by applying a crimp.

Crimp is a wavy bend of natural or artificial fibers that can be made artificially by compressing the fiber masses with heat and thermoforming between the gears of the thermoplastic synthetic fibers. The space occupied by one fiber strand is increased by the crimp, so that the fiber has thermal insulation and bulky properties. In addition, the mixing effect is maximized by the crimp when mixing short fibers.

The crimp shape may be crown-shaped or zigzag-shaped. More specifically, it is possible to form a crimp / inch of 3 to 18 ea for a short fiber having a denier of 0.5 to 15, and a crimp / inch of 7 to 8 ea zigzag crimp / inch for the balding property of the short fiber and the form stability when mixed with other materials May be desirable.

When the unstretched yarn is fed in the crimping step, it may be desirable to design a stretching ratio capable of being crimped to produce a desired final stretch fineness, and to set a stretching temperature and a speed corresponding to the physical properties to optimize physical properties and elongation.

In addition, the length of the short fibers in the crimping step may be 21 mm to 75 mm, and more preferably 51 mm in consideration of compatibility.

Next, Step 2 for producing an artificial filler according to an embodiment of the present invention is a step of preparing a hollow C-type fiber by performing an elution process on C-type fibers formed into single fibers in Step 1.

Specifically, the leaching step is a step of treating the usable polyalkylene terephthalate polymer located in the hollow with sodium hydroxide (NaOH). If the conditions such as the liquid ratio of the caustic soda, the treatment temperature and the treatment time are excessive during the elution step, the polyalkylene terephthalate-based polymer in the shell part may be reduced together, and if the elution condition is weak, There is a fear that the elution is not sufficiently carried out or the retention rate due to the hollow decreases due to the decrease in the elution amount. Considering this point, the elution step is carried out by using an aqueous solution of NaOH (18 g / l to 22 g / l) at a bath ratio (OWS) of 1: 6 to 1:10, a treatment temperature of 90 to 100 ° C, (OWS) of 1: 8, a treating temperature of 100 ° C, a treating time of 40 minutes (min), and a treating time of 40 minutes May be more preferable in terms of workability and commercial properties.

Further, a stirring process may be optionally performed to increase the dissolution efficiency in the elution step.

Specifically, the elution step may be performed using a sliver or pile fiber dyeing machine, more specifically, a liquid agitator capable of appropriately reacting the eluate, and a filtering device capable of filtering the elongated short fibers And can be carried out using a pile short fiber dyeing machine provided.

After the completion of the elution step, a washing step for preventing re-adhesion of the usable polymer remaining in the bath; Dehydration process; Further, any one of the complete separation of each of the short fibers and the drying process for opening the web can be selectively performed, and the process of washing, dehydrating and drying can be performed according to a conventional method.

Through the above process, the usable polyalkylene terephthalate-based polymer in the hollow portion is eluted, and the C type hollow short fiber having one side open is produced.

After the elution step, the produced C-type hollow short fibers may be selectively subjected to a process of treating the chemical such as silicone to impart additional functionality such as silicone water repellent processing, heating material bonding processing, antibacterial and sonic processing .

Next, step 3 for producing an artificial filler according to an embodiment of the present invention is a step of preparing an artificial filler by using the C-type hollow short fibers prepared in step 2.

Specifically, the production of the artificial filler may be carried out using the C-type hollow short fiber prepared in the step 2 alone, or by mixing with other short fibers for fillers. In this way, it is possible to create and maintain two kinds of warmth, namely, securing the warmth of the hollow staple fiber and maintaining the thermal insulation due to the improvement of the bulging property of the general filler material by mixing the stiffened short fibers with the staple fibers for general filler at a certain ratio.

Examples of the other staple fibers for the filler include hollow hollow fibers capable of maximizing thermal insulation, circular-shaped short fibers capable of providing a bulging property to the filler, light-generating short fibers, polyurethane (PU) rubber yarns Fibers, and any one or a mixture of two or more of them may be used. For example, when the light-generating short staple fiber and the PU rubber staple fiber are mixed, it is possible to express additional functions such as light-emitting function based on the warmth and lightness, and a quadratic stestch considering the exercise and outdoor activities.

The C-type hollow short fibers may be contained in an amount of 10% by weight or more, more preferably 10% by weight to 100% by weight based on the total weight of the synthetic filler, It is possible to optimize mixing ratio considering various conditions such as appearance and appearance when used in star and sewing finished products.

FIG. 4A is a perspective view schematically showing an artificial filler according to an embodiment of the present invention, and FIG. 4B is a schematic view of a C-type hollow short fiber included in the artificial filler. 4A and 4B are illustrative of the present invention, but the present invention is not limited thereto.

 The artificial filler produced by the above-described manufacturing process can exhibit excellent light insulation and light weight by using the C-type hollow short fiber eluted from the hollow portion. Further, the artificial filler is mixed with other functional filler materials Because it can be developed as an additional functional filler, it can contribute to the expansion of the clothing, especially the padded finished product market, which requires diverse functionality through material diversification.

According to another embodiment of the present invention, there is provided a garment including the artificial filler, more specifically, padding.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the following examples and experimental examples are provided for illustrating the present invention, and the scope of the present invention is not limited thereto.

Example

Polyethylene terephthalate was melted at 290 캜 as a polymer for forming a shell part. (TPA) and ethylene glycol (EG) were controlled at a molar ratio of 1: 1.2 to form an eccentric hollow region. Dimethylsulfuric acid (TPA) and dimethyl sulfoisophthalate sodium salt (DMSIP) The phthalate sodium salt was adjusted to 1.5 mol%. 10.0 parts by weight of lithium acetate as a catalyst based on 100 parts by weight of dimethylsulfone isophthalate sodium salt (DMSIP) was mixed and esterified at 250 ° C under a pressure of 1140 Torr to obtain an ester reaction product, and the reaction rate was 97.5%. The resulting ester reactant was transferred to a condensation polymerization reactor and 10.0 parts by weight of polyethylene glycol (PEG) having a molecular weight of 6000 was added to 100 parts by weight of the ester reactant. Then, 400 ppm of antimony trioxide was added as a condensation polymerization catalyst so that the final pressure became 0.5 Torr The temperature was raised to 285 캜 while the pressure was gradually reduced to prepare a copolymer through condensation polymerization.

The copolymer obtained by condensation polymerization of an esterification reaction product of terephthalic acid (TPA), ethylene glycol (EG) and dimethyl sulfo isophthalate sodium salt (DMSIP) with polyethylene glycol was melted at 270 ° C., and the melted polyethylene terephthalate The phthalate and the copolymer were spin-co-extruded at a weight ratio of 70:30, respectively, to prepare a drawn yarn (SDY).

Subsequently, the densities of the 240C and 240D were increased to meet the minimum convergence denier 130,000D required for monofilament formation so that the denier of the concave cone was made to be about 1,440, and then the concaved 1440D was prepared with more than 100 cones according to the required converging denier, A hollow yarn was prepared. At this time, the number of strands in the stranding process was set to 10T / M.

The C type hollow yarn prepared above was subjected to a short fiberization process so as to have a length of 51 mm under a crimper condition of 7ea zigzag crimp / inch.

Next, the leaching process was performed on short fiberized C type hollow yarn using a pile fiber dyeing machine. At this time, 20 g / l of NaOH was used to immerse in a bath ratio (OWS) of 1: 8, a treatment temperature of 100 ° C, and a treatment time of 40 minutes. After completion of the elution step, washing with water, dehydration and drying were carried out to prepare C type hollow short fibers.

30% by weight of the C type hollow short fibers prepared was mixed with 70% by weight of the short-chain polyester short fiber 3D grade to prepare an artificial filler.

Experimental Example  One

In the elution process of the artificial filler according to Example 1, the fibrous C type hollow fiber yarn before dyeing was stained with a cationic disperse dye and the cross section was observed. The results are shown in Fig.

This experiment focused on the difference in the content of polyethylene terephthalate (PET) between the shell region surrounding the outer periphery of the hollow region and the hollow region, so that the boundaries can be identified through dyeing, and the hollow shape and hollow ratio can be confirmed from this .

As shown in FIG. 5, a hollow portion and a C-shaped shell portion surrounding the hollow portion can be identified.

In the preparation of the artificial filler according to Example 1, the cross-section of the C-type hollow short fibers obtained after the leaching process of the usable polymer having the hollow portion was observed. The results are shown in Figs. 6A and 6B.

As shown in FIGS. 6A and 6B, all the usable polymers were eluted through the elution process according to Example 1, so that a complete C-shaped short fiber having one side opened can be identified. At this time, it can be seen that the hollow ratio of the hollow portion formed by elution of the usable polymer is about 60%.

Experimental Example  2

The elution efficiency of the short fiberized C type hollow yarn was investigated according to the elution conditions.

C-shaped hollow short fibers were prepared in the same manner as in Example 1, except that the elution step was performed under the conditions shown in Table 1 below.

Caustic soda concentration Waste (O.W.S) Elution temperature Elution holding time Weight loss rate 5g / L 0.5% 80 ℃ 50 minutes 1.0% 10 g / L 1.0% 80 ℃ 50 minutes 4.3% 15g / L 1.5% 80 ℃ 50 minutes 8.2% 20g / L 2.0% 80 ℃ 50 minutes 14.0% 5g / L 0.5% 100 ℃ 20 minutes 3.0% 10 g / L 1.0% 100 ℃ 20 minutes 5.0% 15g / L 1.5% 100 ℃ 20 minutes 21.1% 20g / L 2.0% 100 ℃ 20 minutes 28.9% 20g / L 2.0% 100 ℃ 40 minutes 60.3% 25g / L 2.5% 100 ℃ 30 minutes 59.8% 25g / L 2.5% 100 ℃ 40 minutes 69.6% 30g / L 3.0% 100 ℃ 20 minutes 41.7% 30g / L 3.0% 100 ℃ 30 minutes 69.5% 30g / L 3.0% 100 ℃ 40 minutes 71.3% 35g / L 3.5% 100 ℃ 20 minutes 48.9% 35g / L 3.5% 100 ℃ 30 minutes 63.4% 35g / L 3.5% 100 ℃ 40 minutes 72.0% 40g / L 4.0% 100 ℃ 20 minutes 60.8% 40g / L 4.0% 100 ℃ 30 minutes 65.0% 40g / L 4.0% 100 ℃ 40 minutes 73.0% 45 g / L 4.5% 100 ℃ 20 minutes 63.3% 45 g / L 4.5% 100 ℃ 30 minutes 69.4% 50g / L 5.0% 100 ℃ 20 minutes 65.1% 50g / L 5.0% 100 ℃ 30 minutes 67.5% 50g / L 5.0% 100 ℃ 40 minutes 75.5%

In Table 1, the weight loss rate was calculated according to the following equation:

&Quot; (3) &quot;

Weight loss (%) = (weight of C-type hollow short fiber after elution / weight of short C-type hollow fiber before melt) × 100

Experimental results show that the highest elution efficiency is obtained when caustic soda concentration is 20g / L, O.W.S 2.0%, elution temperature is 100 ℃, and elution retention time is 40 minutes.

Experimental Example 3

The warmth of the artificial filler according to the present invention was evaluated.

Specifically, the heat resistance of the artificial filler prepared in Example 1 was measured using the ASTM D 1518: 1985 test method as a measurement standard. For comparison, an artificial filler having various weights including only a round cross-section polyester short fiber 3D was prepared and the heat resistance was measured.

Composition of artificial filling weight Thermal resistance (clo) Example 1 C type hollow staple fiber 30% + round cross-section polyester staple fiber 3D grade 70% 90 gsm 1.94 Comparative Example 1 Circular cross-section polyester Short fiber 3D 100% 70 gsm 0.86 Comparative Example 2 Circular cross-section polyester Short fiber 3D 100% 90 gsm 1.06 Comparative Example 3 Circular cross-section polyester Short fiber 3D 100% 120 gsm 1.58

The value of the thermal resistance expressed in the unit of Clo indicates that the higher the value, the better the warmth. As a result of the test, the artificial filler according to Example 1 exhibited excellent thermal insulation properties as compared with Comparative Examples 1 to 3, and exhibited about twice the warmth as compared with the artificial filler of Comparative Example 2 having the same weight.

10: C type hollow yarn
100: Shell part
200: hollow portion

Claims (19)

The present invention relates to a method for producing an artificial filler comprising C-type hollow short fibers,
Shortening the C type hollow yarn into short fibers;
Preparing a C-type hollow staple fiber by performing an elution process on the short fiber type C hollow yarn; And
Preparing an artificial filler by using the C-type hollow short fiber,
The shortening is performed by forming a zigzag type crimp to 7 to 8 ea zigzag crimp / inch,
Wherein the elution step is performed using a pile short fiber dyeing machine equipped with a liquid agitator capable of reacting the eluent and a filtering device for filtering short fibers after elution,
In the elution step, the short fibrous C type hollow yarn is treated at a bath ratio of 1: 6 to 1:10, a treating temperature of 90 to 100 DEG C, a treating time of 40 minutes to 1 Lt; RTI ID = 0.0 &gt; time &lt; / RTI &
Wherein the C-type hollow staple fiber satisfies all of the following conditions (1) to (3):
(1) C-shaped including slit with open cross-section
(2) The hollow ratio (percentage of the hollow cross-sectional area included in the hollow fiber to the total cross-sectional area of the C-type hollow fiber) is 60% or more
(3) C-type hollow short fibers have a length of 21 mm to 75 mm and have 0.7 to 11 Denier / Filament. The method according to claim 1,
Wherein the C-type hollow staple fiber comprises a polyester-based synthetic resin. The method according to claim 1,
Wherein the C-type hollow short staple fiber is any one selected from the group consisting of a partially drawn yarn, a drawn yarn, a false twist yarn, an air textured yarn, an edge crimped yarn, and a composite yarn. The method according to claim 1,
Further comprising staple fibers for other fillers in an amount of 90 wt% or less based on the total weight of the synthetic filler. The method of claim 4,
Wherein said other filler short fibers include one or more selected from the group consisting of hollow short fibers, circular cross section short fibers, light generating short fibers and polyurethane rubber short fibers. The method according to claim 1,
Wherein the C-type hollow fiber yarn is C-shaped including a slit having an open cross-section, the shell portion including a polyester-based polymer; And an eccentric hollow portion including a usable polyester-based polymer. The method of claim 6,
Wherein the C-type hollow fiber yarn comprises a shell portion and an eccentric hollow portion at a volume ratio of 30 to 40: 60 to 70. The method according to claim 1,
Wherein the C-type hollow fiber yarn has a minimum convergence denier of 130,000 D. The method according to claim 1,
Further comprising the step of performing at least one pre-treatment step selected from the group consisting of folding and stretching of the C type hollow yarn before the short fiberization step. The method according to claim 1,
Before the short fiberization step, 240 D was added to the C type hollow yarn in a number of 6 or more, dynar of the yarn cone was multiplied by 1,440 D, and the yarn 1440 D thus obtained was subjected to pre- &Lt; / RTI &gt; wherein the method further comprises the steps of: The method of claim 10,
Wherein the puff is performed so that the number of puffs is 7T / M to 15T / M. The method according to claim 1,
Further comprising a pretreatment step of stretching the C type hollow yarn at a ratio of 1.4 to 2.5 before the step of shortening the fiber. The method according to claim 1,
Wherein the preparation of the artificial filler is carried out by mixing C-type hollow short fibers with other short fibers for fillers. delete delete delete delete delete delete

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