KR100275029B1 - The process for preparing polyester composite yarn with different shrinkage - Google Patents

Abstract

The present invention provides a method for producing a bi-shrink blend yarn by combining polyester fibers having different thermal contraction rates, the method comprising spinning a polymer through a first and a second spinneret in a spin drawer, each spinning spinneret Separating each of the divided yarns into two separate yarns, stretching a portion of the separate yarns as the core yarns between the first high-detro controller and the second high-detro controller downstream thereof, and extending the core yarns at the same time. To take at the speed of the second gode controller without passing through the first gode controller by using the effect yarn and to produce two mixed yarns by combining one separation yarn of the core yarn and one separation yarn of the effect yarn. The present invention relates to a method for producing an ester biaxially blended yarn, which allows one composite yarn to be manufactured from one spinneret. Then, the production efficiency can be doubled compared to the conventional spin draw composite manufacturing method.

Description

Manufacturing method of polyester biaxial blended yarn

The present invention relates to a method for producing a polyester biaxially blended yarn in which polyester fibers having different degrees of shrinkage with respect to hot water in a spin draw spinner are mixed.

Conventionally, in order to manufacture a composite yarn, a yarn that is a material must first be manufactured through a separate process. In other words, the high and low shrinkage parts should be radiated separately and combined with separate apostles in the drawing machine, or the finished yarns must be plyed together using a separate ridge. The composite yarn manufactured in this way has a long manufacturing process, and the manufacturing cost is high at the time of production. As a result of dyeing of different kinds of yarns having different manufacturing processes, dyeing difference between the core yarn and the effect yarn occurs, resulting in defects of the fabric.

As described above, Japanese Patent Application Laid-Open No. 7-243144 discloses a spin thrower as an attempt to prevent process defects and fiber appearance defects, which are accompanied by various steps of the composite yarn, and to improve productivity and reduce manufacturing costs. A method of attaching a hot tube device to a core yarn and an effect yarn to vary the heat setting rate between the core yarn and the effect yarn has been proposed. However, this method has the disadvantage of attaching an expensive and difficult-to-handle facility such as a hot tube.

As a prior art for solving such a problem, Japanese Patent Laid-Open No. 63-235513 discloses a method for manufacturing a biaxially blended blend by combining two or more polyester fibers having different thermal shrinkage rates, wherein the core yarn and the effect yarn in a spin drawer After spinning through a separate spinneret has been proposed a method for producing a polyester bi-shrink blended yarn, characterized in that the core yarn is passed through the straight yarn and the effect yarn is passed through the bypassed yarn. This method makes it possible to produce composite yarns at high speed in spin-draw spinners without the need for expensive equipment. However, if the two materials with different thermal history and slope pass through the second gode controller without the intermixing due to the entanglement, the materials are separated from each other due to the tension difference on the rollers, causing mutual interference, resulting in process defects. do. This tendency is further exacerbated when heat is applied to the second gode controller, which results in the occurrence of a loop upon entanglement just before the winder.

In addition to these drawbacks, these methods are all related to the method of manufacturing one composite yarn by direct spinning core yarn and bypassed effect yarn through different spinnerets. Will be. This is because the number of spinnerets that can be mounted at one time in a conventional spin draw spinning system is limited, so it is impossible to double the number as needed.

Therefore, in order to solve the above problems of the prior art, it is a technical problem to manufacture one biaxial horn fiber in one spinneret in one spinning system.

FIG. 1 is a plan view of a spinneret in which the radiation holes are separated in left and right directions, and the left and right radiation holes have the same number, wherein FIG. 1A shows the spinneret of the left 48 holes / right 48 holes, and FIG. 1B shows the left 24 holes / Each of the spinnerets in the right 24 holes is shown.

FIG. 2 is a view schematically showing the slopes of the core yarn and the effect yarn in the spin drawer with the spinneret of FIG. 1.

3 is a plan view of the spinneret in which the radiation holes are separated in the left and right directions, and the left and the right radiation holes are different from each other, showing the spinnerets of the left 48 holes and the right 24 holes.

FIG. 4 is a view schematically showing the slopes of the core yarn and the effect yarn in the spin drawer with the spinneret of FIG. 3.

※ Explanation of code for main part of drawing ※

1: first spinneret 2: second spinneret

3: 1st go-detro controller 4: 1st separate roller

5: 2nd separate roller 6: 2nd high controller

7: first entanglement device 8: third goth controller

9: third separator roller 10: second entanglement device

According to the present invention to achieve the above object, in the method for producing a bi-shrink mixed fiber by combining polyester fibers having different thermal shrinkage rate,

(Iii) spinning the polymer through the first and second spinnerets in a spin draw spinner,

(Ii) separating each thread spun from each spinneret into two separate threads,

(Iv) drawing a portion of the separate yarns as a core yarn between a first gorodola and a second gorodola downstream thereof;

(Iii) drawing a part of the separate yarns as an effect yarn at the same time as drawing the core yarn and pulling it at the speed of the second gorodoulder without passing through the first gorodrol; and

(Iii) A method of producing a polyester biaxially blended yarn is provided, comprising the step of combining two separate yarns of the core yarn and one separate yarn of the effect yarn to produce two mixed yarns.

Hereinafter, the present invention will be described in more detail.

According to a preferred embodiment of the present invention, the yarns are discharged and separated from the two spinnerets, so that each of the two core yarns and the effect yarns.

The method of selecting as the core yarn or the effect yarn adopts a manner in which the two separate yarns from the first spinneret are the core yarns or the effect yarns, and correspondingly the two separate yarns from the second spinneret are the effect yarns or core yarns; Or one of the separating threads from the first spinneret and one of the separating threads from the second spinneret is the core yarn or the effect yarn, and correspondingly the other one of the separating threads from the first spinneret and the second It is possible to adopt a method in which the other of the separate threads from the spinneret is the core yarn or the effect yarn.

The spinneret allows both the first spinneret and the second spinneret to separate the radiating holes in the left and right directions, and may allow the left and right radiating holes to be the same or different from each other.

Hereinafter, with reference to the drawings will be described by the preferred embodiment method.

Figure 1 is arranged to separate the left and right holes so as to easily separate the discharged yarn to the left and right, so that the odd number on both sides left and right, Figure 1a is a left 48 hole / right 48 hole form, Figure 1b is a left 24 hole It shows the shape of the right 24 holes.

FIG. 2 shows a method of manufacturing the weaving-side mixed fiber by simultaneously installing the spinneret 1 on the left side in FIG. 1A and the spinneret 2 on the right side in FIG. 1B in one spinning system. That is, the two thread threads E1 and E2 from both the left and right sides of the first spinneret 1 bypass the first high controller 3 and the second goth roller 6 installed at the lower part of the first high controller 3. It is passed through the form of the effect yarn, the two yarns (C1, C2) from both the left and right sides of the second spinneret (2) are both stretched between the first high controller 3 and the second high controller 6 The method of manufacturing two biaxial intertwined yarns is exemplified by pulverizing E1 and C1, E2 and C2 in the entanglement device 7, respectively, as the core yarn through the stretched yarn. This makes it possible to manufacture two biaxially blended yarns from two spinnerets, maximizing the production efficiency of the radiator.

The odd number of spinnerets used on the core yarn side is preferably equal to or smaller than the odd number of spinnerets on the effect side.

The first separator roller 4 may be located above or below the first high controller in a motor driven or non-driven manner. In addition, the second separator roller 5 may or may not be used, and the second entanglement device may also be used or not used as necessary.

On the other hand, the spinneret of Figure 1 is arranged so that the odd number of the left and right are both yarns discharged from one spinneret should be a core yarn or an effect yarn, in which case the distribution of the polymer discharged to the left and right holes must be uniform Since a composite yarn having the same fineness can be made, and the spinneret discharge amounts on the core side and the effect side are the same, the composite yarn having the same denier on the core yarn and the effect is inevitably produced. Therefore, as the denier of the material yarn becomes the same, the effects of resilience and bulkiness of the composite yarn are inferior. Also, when the polymer is not uniformly distributed from side to side of the spinneret, the left and right deviations cause greater deviation in the overall denier of the composite yarn. Care must be taken when designing the spinneret as it may occur.

FIG. 3 illustrates spinnerets having different odd numbers on the left and right sides, one of which is used as a core yarn and the other as an effect yarn. According to this method, the denier of the material can be adjusted to a desired value by adjusting the number of left and right holes and the size of the hole in the spinneret design, thereby fully utilizing the effect of the composite yarn according to the change of the fine fiber fineness and the fineness of the material yarn. In addition, since the material yarns discharged through one spinneret are composited with each other, there is an advantage that the entire denier of the composite yarn is kept uniform.

FIG. 4 illustrates a method of manufacturing biaxial blended yarn using the spinneret of FIG. 3.

That is, the yarns E1 and E2 discharged from the left side of each of the first and second spinnerets 1 and 2 bypass the first high controller 3 and have a second high controller installed below the first high controller. 6) to pass through the effect yarn, and the yarns C1 and C2 discharged from the right side pass through the straight drawing yarns drawn between the first high-detro controller 3 and the second high-detro controller 6 as core cores. , In the entanglement device 7 illustrates the method of manufacturing two biaxial horn-seed yarn by plying E and C, respectively. This makes it possible to manufacture one biaxial blended yarn from one spinneret, maximizing the production efficiency of the spinning machine and keeping the denier of the composite yarn always uniform.

In this case, the odd number of the core yarn side may be smaller than or equal to that of the effect side, and the first separate roller 4 may be positioned above or below the first high controller in a motor-driven or non-driven manner. In addition, the second separator roller 5 may or may not be used, and the second entanglement device may also be used or not used as necessary.

According to this method, since the winding speed is very fast, the number of entanglements is lower than that of a composite yarn manufactured by a general drawing machine or a separate copier machine. In order to compensate for this, it is necessary in this method to raise the air pressure of the entanglement apparatus to the maximum within a range where no rain occurs. Suitable air pressure is about 1.5-5.0 kgf / cm 2. At this time, the average number of entanglement is about 35 per meter, and if the air pressure is weaker than this, the number of entanglements is less than 20 per 1m.

Another method is to produce a composite yarn at high speed in the spin draw apparatus, and then use a simple entanglement apparatus to give reentanglement. In other words, if the air pressure of the first entanglement device is applied at a very low pressure of 1.0-2.0 kgf / cm2 and only the apostle is stabilized in the third high-detro controller, the winding number is not increased without using the second entanglement device. At the dog level. In this state, if the entanglement at the air pressure of 2.0-4.5kgf / ㎠ in the entanglement device while driving at the firing speed 400-600 m / min, it is possible to produce a composite yarn having a high number of entanglement of 60-80 per meter. In this case, there is an increase in the production cost due to reprocessing, but as the number of interlocks increases, the dyeing uniformity and bulkability are greatly improved, and thus the selling price can be increased by the quality improvement. Suffice.

In the present invention, the fineness of the core yarn is 30 to 150 denier and the short fiber fineness is 2 to 10 denier, and the fineness of the effect yarn is preferably 40 to 200 denier and the short fiber fineness is 0.3 to 6 denier.

In the present invention, it is preferable to use a material having a large single fiber fineness for maintaining the shape of the composite yarn and elasticity of the fabric. The fineness of the fibers may vary depending on the use of the fabric to be applied, but the fineness of the short fibers is 2-10 denier, preferably 2-8 denier. If the fineness is too large, the overall drape of the fabric is poor, if too small, the fabric is flickering and the resilience is reduced. In addition, the cross section of the yarn shows a good effect in both circular and deformed cross-section, but in terms of the elasticity maintenance of the fabric, triangular cross section, circular hollow cross section, triangular hollow cross section, flat hollow cross section, flat cross section, etc. are advantageous than circular cross section.

In comparison, the effect yarn contributes to the touch expression and texture expression of the composite yarn, and the smaller the short fiber fineness, the better the pitch skin touch. Normal short fiber fineness of 0.3-6 denier, preferably 0.3-5 denier is good for the effect, and the shape of the fiber cross section is not largely affected, but the circular or triangular cross section is good for expressing the effect. Is good.

Therefore, when designing the spinneret, the hole arrangement and the number of holes should be determined in consideration of the fineness and the single fineness of each yarn, and the cross-sectional shape of the hole should be set in consideration of the fabric effect.

In general, partially drawn yarns radiated at a spinning speed of 2,000-4,000m / min show a heat shrinkage of at least 30% and as high as 70%, which is -5 to 5% when heat is applied in the hoisting process during the weaving process. The heat shrinkage rate is reduced. Therefore, the second and third gode controller and the winding speed of the manufacturing process of the present invention is suitable for 2,000-5,000m / min, preferably 2,500-4,500m / min. If it is lower than this speed range, the strength is low and the elongation is too high to lose the fiber value, and if it exceeds 5,000 m / min, properties similar to that of the drawn yarn are expressed, and the effect of the partially drawn yarn cannot be obtained.

The speed of the first gode controller has a speed that the core yarn can be drawn yarn, the draw ratio is preferably 1.5-5.0 times, preferably 2.0-4.5 times. At this time, the thermal contraction rate of the stretched yarn is about 10-25%, and after the weaving process during the weaving process, the thermal contraction rate is about 5-20%.

Features and other advantages of the present invention as described above will become more apparent from the embodiments described below. The following examples are intended to illustrate the invention, it should be understood that the invention is not limited thereto.

Example 1

Using the spinneret of FIG. 1, a biaxial hornsum yarn was prepared in the slope of FIG. At this time, the core yarn used a yarn made with a single fineness of 3 denier for 24 filaments, and the effect yarn used a yarn made with a single fineness of 1.5 denier for 48 filaments. The speed of the first gode controller was 1,200 m / min, the speed of the second go de controller was 4,300 m / min, the speed of the third go de controller was 4,280 m / min, and the air pressure of the interlock device was 3.0 kgf / cm 2. The results of the radiation, the number of occlusion and the degree of biaxial contraction are shown in Table 1.

Example 2

Using the spinneret of FIG. 3, a biaxial hornsum yarn was prepared in the slope of FIG. 4. At this time, the core yarn used a yarn made with a single fineness of 2.5 denier for 24 filaments, and the effect yarn used a yarn made with a single fineness of 1.5 denier for 48 filaments. The speed of the first gode controller was 1,200 m / min, the speed of the second go de controller was 4,300 m / min, the speed of the third go de controller was 4,280 m / min, and the air pressure of the interlock device was 3.0 kgf / cm 2. The results of the radiation, the number of occlusion and the degree of biaxial contraction are shown in Table 1.

Example 3

Core yarn used yarn made of 2 denier single fineness for 36 filament, and effect yarn was repeated the same procedure as in Example 1 except that yarn made of single fineness 1.5 denier for 36 filament.

Example 4

The core yarn used yarn made of single fineness 4.5 denier for 12 filaments, and the effect yarn was repeated with the same procedure as in Example 2, except that yarn made with single fineness 1 denier was used for 72 filaments.

Example 5

The same procedure as in Example 2 was repeated except that the speed of the first gode controller was 1500 m / min and the speed of the second gode controller was 4,500 m / min.

Example 6

The core yarn was repeated in the same procedure as in Example 2 except that yarns made of single fineness 4.5 deniers were used for 12 filament circular hollows, and effects yarns were made of yarns made of single fineness 1 deniers for 48 filaments.

Example 7

The same procedure as in Example 2 was repeated except that the air pressure of the entanglement apparatus was 4.0 kgf / cm 2.

Example 8

A composite yarn was manufactured in the same manner as in Example 2 except that the air pressure of the entanglement device was 4.0 kgf / cm 2, and the air pressure of the entanglement device was 3.5 at the speed of 400 m / min using the simple entanglement device. Re-entanglement was given as kgf / cm <2>. The results of the sacrifice, the number of occlusions, and the degree of biaxial contraction are shown in Table 1 below.

Comparative Example 1

The core yarn used yarn made of 1 denier with a single fineness using 72 holes of detention, and the effect yarn was repeated with the same procedure as Example 1 except that the yarn made with single fineness of 1.5 denier was used with 12 holes of detention. It was.

Comparative Example 2

Core yarn used yarns made with 6 fine deniers of single fineness using 12-hole detention, and Effect yarn repeated the same procedure as Example 1 except that yarns made with single fineness of 1 denier were used with 72-hole detention. It was.

Comparative Example 7

The same procedure as in Example 1 was repeated except that the air pressure of the entanglement apparatus was 5.5 kgf / cm 2.

division Fair Fairness Heat Shrinkage Difference ^※ (%) Number of intersections (pcs / m) Mou Fabric Resilience ^※※ 2nd gode controller winding degree Example 1 Good 19 32 radish ○ radish Example 2 Good 21 33 radish ○ radish Example 3 Good 18 32 radish △ radish Example 4 Good 23 32 radish ○ radish Example 5 Good 17 28 radish ○ radish Example 6 Good 18 30 radish ◎ radish Example 7 Good 20 38 radish ○ radish Example 8 Good 21 73 radish ○ radish Comparative Example 1 Good 19 33 radish × radish Comparative Example 2 Good 10 18 radish ○ radish Comparative Example 3 Bad 20 45 bunch Unwind bunch

※ The difference in heat shrinkage is obtained by subtracting the heat shrinkage rate of the core yarn after the call treatment from the heat shrinkage rate of the core yarn after the call treatment.

※※ Fabric Resilience: ◎… Very good. Good,? usually

As described above, according to the present invention, one composite yarn may be manufactured from one spinneret in manufacturing the spin draw composite yarn, thereby increasing the production efficiency twice as compared to the conventional spin draw composite yarn manufacturing method.

Claims (12)

In the method for producing a bi-shrink blend fiber by combining polyester fibers having different thermal contraction rate, (Iii) spinning the polymer through the first and second spinnerets in a spin draw spinner, (Ii) separating each thread spun from each spinneret into two separate threads, (Iv) drawing a portion of the separate yarns as a core yarn between a first gorodola and a second gorodola downstream thereof; (Iii) drawing a part of the separate yarns as an effect yarn at the same time as drawing the core yarn and pulling it at the speed of the second gorodoulder without passing through the first gorodrol; and (Iii) combining two separate yarns of the core yarn and one separate yarn of the effect yarn to produce two mixed yarns. 2. The polyester shrinkage as claimed in claim 1, wherein the two separate yarns from the first spinneret are the core yarns or effect yarns, and the two separate yarns from the second spinneret are the effect yarns or core yarns. Preparation method of blended yarn. The method according to claim 1, wherein one of the separate threads from the first spinneret and one of the separate threads from the second spinneret is a core yarn or an effect yarn, and correspondingly among the separate threads from the first spinneret. A method for producing a polyester biaxially blended yarn, wherein the other one and the other one of the separate yarns from the second spinneret are effect yarns or core yarns. 2. The polyester biaxial blending fiber of claim 1, wherein both the first spinneret and the second spinneret have their radiation holes separated in left and right directions, and the left and right radiation odds are equal to or different from each other. Manufacturing method of the company. The method according to claim 1, wherein the core yarn is drawn between the first gorodrol and the second gorodrol beneath, and the effect yarn is drawn at the speed of the second gorodrol without passing through the first gorodoulder, and then the two companies go to the third gorod. A method for producing a polyester biaxially blended yarn, which is spun through an entanglement device immediately before a controller. The method of claim 1, wherein the winding speed of the braided composite yarn is 2,000-5,000 m / min. The method according to claim 1, wherein the entanglement is carried out by an entanglement device at any one or both of the periods immediately before or after the third gode controller. The method of claim 1, wherein the air pressure of the entanglement device during weaving is 1.5-5.0 kgf / cm 2, wherein the number of twisted yarns of the composite yarn is 25-45 pieces per 1m. According to claim 1, wherein the air pressure of the entanglement device is 1.0-2.0 kgf / ㎠ to produce a composite yarn of 0-10 per yard of entanglement, and then by the entanglement in the simple entanglement device, the number of entanglements per 60m Method for producing a polyester biaxial blend fiber, characterized in that to be -80 The method according to claim 1, wherein the heat shrinkage rate after the call treatment is 5-20% of the core yarn, and the effect yarn is -5-5%, and the difference in heat shrinkage rate after the call treatment is 5-20%. Method for producing polyester bishrink blended yarn The polyester yarn fineness of claim 1, wherein the fineness of the core yarn is 30-150 denier and the short fiber fineness is 2-10 denier, and the effect yarn fineness is 40-200 denier and the short fiber fineness is 0.3-6 denier. Method for producing shrinkage blend yarn. The method for producing a polyester biaxial blended yarn according to claim 1, wherein the core yarn has a circular, hollow, triangular, Y, flat cross section.