JP3418265B2 - Method for producing cation-mix-like fine fiber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a cation-mix thick fine fiber used for clothing, interior use and the like.

[0002]

2. Description of the Related Art Conventionally, as a means for expressing a multicolor of a textile product, a dyed yarn or a dyed yarn which has been dyed in a yarn shape in advance is mixed, twisted,
Mixing by means such as mixed weaving or knitting, or by mixing spun-dyed yarn and fibers with different dyeability before dyeing to make multicolor expression such as cine, melange and chambray, or coloring only the fiber surface layer There is a decolorization of the fiber surface layer part by physical and chemical treatment of ring dyed.
All of them have problems such as complicated process and high cost.

Further, as a multicolor means for the fibers themselves, there are thick and thin fibers which give a marbling effect. The thick and thin fibers can obtain the marbling effect due to the shading effect based on the difference in dyeing property between the thick portion and the detail, but cannot obtain the multicolor effect having different hues. On the other hand, the thick and thin fibers exhibit a soft texture with an excellent bulging feeling based on the difference in shrinkage characteristics between the thick portion and the detail.

In order to utilize the texture of the thick and thin fibers and to impart a multicolor effect, the thick fibers of ordinary semi-dull or bright polymer and the ordinary drawn yarn or thick fibers of cationic dye dyeable polymer are mixed. After that, cross twist,
A method of mixing by means of knitting, knitting or the like is generally adopted. The cation-mixed polyester thick and thin fibers obtained by this method have an excellent swelling feeling, a soft texture, and a multicolor effect having different hues.

However, since two kinds of yarns having different dyeability are mixed in the subsequent step, the degree of mixing is relatively coarse, and the multicolor effect has a strong contrast. Further, there are problems that the process is complicated, the cost is high, the dyeing quality is difficult to control, and the quality control is difficult.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a cation-mix thick thin fiber which has a high degree of mixed fiber, a natural and mild multicolor effect, and a soft and excellent swelling feeling.
The purpose is to obtain at low cost.

[0007]

SUMMARY OF THE INVENTION In the present invention, a cationic dye dyeable polyester (component A) and a cationic dye non-dyeable polyester (component B) are simultaneously discharged from a single spinneret to form A, B, respectively. After cooling the filaments discharged as a filament group of each component, an oil agent is applied and an air entanglement treatment is performed between a pair of rollers to carry out an A component filament group and a B component.
Non-stretched mixed fibers in which the ratio [B component / A component] of the maximum draw ratio of the single unstretched yarn of each of the A and B components obtained by mixing the component filament groups is in the range of 0.85 to 1.15. A yarn is drawn under the following conditions (1) to (4), which is a method for producing a cation-mix thick thin fiber.

(1) MDR × 0.50 ≦ TDR ≦ MDR × 0.60 (2) TDR = DR ₁ × DR ₂ (3) MDR × 0.45 ≦ DR ₁ ≦ MDR × 0.55 (4) Tg ≦ THR ≦ Tc where TDR is the total draw ratio, MDR is the maximum draw ratio of the mixed fiber undrawn yarn, DR ₁ is the first draw ratio, DR ₂ is the second draw ratio, and THR is the first draw area. Stretching temperature (℃), Tg
Is the lower glass transition temperature (° C) of the A and B components, T
c indicates the higher crystallization temperature (° C.) of the A and B components.

In the present invention, it is necessary that the cationic dye-dyeable polyester as the component A and the cationic dye-non-dyeable polyester as the component B be simultaneously discharged from a single spinneret. As component A, 5-sodium sulfoisophthalic acid is preferably 1.5 to 3 mol%
A modified polyester having copolymerized ethylene terephthalate as a main repeating unit, and an unmodified polyester having ethylene terephthalate as a main repeating unit are preferably used as the component B.

In the spinneret, as shown in FIGS. 1 (a) and 1 (b), a hole group (a) discharged by the A component and a hole group (b) discharged by the B component are divided into two or four. A single spinneret is used, which is divided into sections and arranged. When the difference in fineness between the filaments of the A component filament group and the filaments of the B component filament group to be discharged is large, a two-division type spinneret as shown in FIG. 1 (a) is used and the manufacturing apparatus shown in FIG. As described above, after the cooling air blown perpendicularly to the discharged yarn hits the filament group of large fineness, it is desirable to arrange the spinning nozzle so as to hit the filament group of fineness and perform spinning.

The yarn discharged from the spinneret is cooled by a cooling air blown at right angles to the yarn, and an oil agent is applied to the yarn, and an air entanglement treatment is performed by an air entanglement device installed between a pair of rollers. Then, the A component filament group and the B component filament group are mixed and wound as a mixed fiber undrawn yarn. The air entanglement treatment in the present invention is not to give a knot to the yarn, but to mix the filaments of the A component filament group and the B component filament group. When a knot portion is formed in the mixed fiber unstretched yarn, the knot portion adversely affects the dispersion of thick and fine details and the thick and thin formation itself in the subsequent drawing for thick and thin formation.

In the present invention, the obtained mixed fiber unstretched yarn has a total draw ratio of 0.50 to 0.60 times the maximum draw ratio and a first draw of 0.45 of the maximum draw ratio. ~
Stretching is carried out at a stretching ratio of 0.55 at a temperature not lower than the lower glass transition temperature of the components A and B and lower than the higher crystallization temperature of the components A and B by two-stage stretching. By this two-stage drawing, thick and thin fibers in which the unstretched thick portion and the stretched detail are highly dispersed can be obtained.

In the present invention, the maximum draw ratio is
It is defined as follows. Using a two-stage drawing machine, the drawing speed (drawing roller speed) is 600 m / min, and the drawing temperature is 85.
C., while maintaining the speed ratio of the yarn feeding roller and the heating roller to 1.011 while drawing the undrawn yarn, the speed of the heating roller is reduced at a rate of 20 m / min to increase the second stage draw ratio. Let The second stage draw ratio is calculated from the speed of the heating roller when the yarn being drawn breaks, and the total draw ratio at this time is called the maximum draw ratio.

In the present invention, in order to make both the A component filament group and the B component filament group constituting the thick and thin fiber into thick and fine fibers in which both fine and highly detailed are dispersed,
The ratio of the maximum draw ratio of a single undrawn yarn of each of A and B components [B
It is necessary to use a mixed fiber undrawn yarn having a component / A component] in the range of 0.85 to 1.15. If the ratio of the maximum draw ratios of the A and B components exceeds 1.15, the total draw ratio of the mixed fiber undrawn yarn required in the two-stage drawing cannot be reached, and in the B component filaments, the dispersion of the thick and fine details is not achieved. When the obtained thick and thin fibers are coarse and have high boiling water shrinkage, and the resulting thick and thin fibers are heat-treated, dissociation occurs between the two component filaments due to the difference in shrinkage with the A component filaments, and the mixed fiber state is lost. , Loops and fluff are generated in the undrawn yarn of mixed fiber and the drawn thick and thin fibers.

On the other hand, when the ratio of the maximum draw ratios of the A and B components is less than 0.85, conversely, the thickness of the B component filament,
It becomes difficult to form the details, not only the multicolor effect, but also a soft texture with a sufficient bulge cannot be obtained, and the strength is not sufficient. Can't get

In order to obtain a mixed fiber undrawn yarn in which the ratio [B component / A component] of the maximum draw ratio of a single undrawn yarn of each of the components A and B is in the range of 0.85 to 1.15. Is a polymer having an intrinsic viscosity of 0.55 to 0.60 of a modified polyester containing ethylene terephthalate copolymerized with 5-sodium sulfoisophthalic acid as a main component as a main component, and ethylene terephthalate as a main component is a main repeating unit. A polymer having an intrinsic viscosity of 0.65 to 0.75 of unmodified polyester as a unit is used.

When the intrinsic viscosity of the component A polymer is less than 0.55, the strength of the obtained thick and thin fibers is low, and yarn breakage, fluffing, etc. occur in the processing step and sufficient process passability is not obtained. When the intrinsic viscosity of the component polymer exceeds 0.60,
The solution viscosity is high, the pressure loss during spinning and filtration is large, and there is a problem in the durability of the spinneret and the filtering material. Further, if the intrinsic viscosity of the B component polymer is less than 0.65, the strength of the obtained thick and thin fibers is low, thread breakage in the processing step, generation of fluff, etc. occur and sufficient process passability is not obtained, and the B component is obtained. When the intrinsic viscosity of the polymer exceeds 0.75, the solution viscosity is high, and the maximum draw ratio of the resulting mixed fiber undrawn yarn is low. In order to make the ratio of the maximum draw ratios of the components A and B within the above range. , One A
The intrinsic viscosity of the component polymer must be a polymer having a viscosity of more than 0.60.

In addition, the ratio [B component / A component] of the maximum draw ratio of a single undrawn yarn of each of A and B components is 0.85 to 1.1.
In order to obtain a mixed fiber undrawn yarn in the range of 5, preferably,
In addition to the intrinsic viscosity of the polymer, when discharging from the spinneret,
The discharge amount ratio of the A component and the B component is set to 1: 3 to 3: 1 and the number of holes and the hole diameter of the hole group in the spinneret of each of the A and B components are appropriately selected to discharge from the spinneret. A done
By adjusting the discharge linear velocity of each B component, the spinning draft ratio of the discharge yarns of the A component and the B component [B component / A component] is 2.0 to.
Set to 4.0.

The thick and thin fibers obtained by the two-stage drawing according to the present invention may be subjected to an arbitrary processing as they are, and may be used for a woven or knitted product. However, in order to improve the controllability of the mixed appearance, after the drawing, The air entanglement may be performed by treating with an air entanglement device under a constant tension. A known nozzle such as an interlaced nozzle is used for the air entanglement device, and the air pressure is preferably set to 0.6 to 1.2 kg / cm ² .

The thick and thin fibers according to the present invention are composed of a cationic dye-dyeable polyester filament and a cationic dye-non-dyeable polyester filament, each of which has a thick portion and a fine detail, and both filaments are mixed. It is in a broken state.

[0021]

EXAMPLES The present invention will be specifically described below with reference to examples.

(Examples 1 to 4 and Comparative Examples 1 to 3) A cationic dye-dyeable polyester (component A) having ethylene terephthalate obtained by copolymerizing 2.0 mol% of 5-sodium sulfoisophthalic acid as a repeating unit. The viscosity is 0.
Using the modified polyester of No. 58, polyethylene terephthalate having an intrinsic viscosity of 0.70 as the cationic dye non-dyeable polyester (Component B), and measuring A and B components, as shown in FIG. A spinneret in which a hole group (a) from which a component is discharged and a hole group (b) from which a B component is discharged are divided into two parts, and the hole groups (a) and (b) have holes shown in Table 1, respectively. Using a spinneret having several circular holes, the spinning temperature was 290 from the spinneret under the spinning conditions shown in Table 1.
Melt spinning was performed by discharging at the same time.

After the discharged yarn was cooled by blowing cooling air, an oil agent was applied, and the yarn was wound at a speed of 1800 m / min while performing an air entanglement process at an air pressure of 1 kg / cm ² .
The obtained mixed fiber undrawn yarn was drawn under the drawing conditions shown in Table 1 to obtain 100 to 250 d / 48 f thick and thin fibers. The obtained thick and thin fibers were evaluated by arranging a 50d / 18f polyethylene terephthalate ordinary drawn yarn as the warp and a thick and thin fiber obtained in this Example or Comparative Example as the weft, and woven into a plain weave fabric. The results of evaluation of the mixing effect and the texture based on the A component filaments and the B component filaments in the woven fabric are shown in Table 1 after the alkali weight reduction treatment with a weight reduction rate of about 10% by weight and then dyeing with a cationic dye.

[0024]

[Table 1]

[0025]

EFFECTS OF THE INVENTION According to the present invention, two kinds of polyester polymers having different dyeing properties with respect to a cationic dye are used, and highly mixed fibers are obtained in the process of spinning and undrawn yarn, and a natural and mild multicolor effect is exhibited. Thus, it is possible to obtain a cation-mixed thick and thin fiber that is soft and has an excellent feeling of swelling at low cost and with good spinning stability.

[Brief description of drawings]

FIG. 1 is a plan view of an example of a spinneret used for producing a cation-mix thick fine fiber of the present invention, (a) is a two-division type, and (b) is a four-division type.

FIG. 2 is a schematic view of an example of an apparatus for producing a mixed fiber undrawn yarn used for producing a cation-mix thick thin fiber of the present invention.

[Explanation of symbols]

a A group of holes discharged by A component b Hole group discharged by B component 1 Spinneret 2 discharge yarn 3 Cooling device 4 lubricator 5 Air confounding device 6 winder

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-62-78212 (JP, A) JP-A-57-133233 (JP, A) JP-A-59-43116 (JP, A) JP-A-8- 35137 (JP, A) JP 7-292524 (JP, A) JP 7-324241 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D01F 6/62 D01F 6 / 84 D02J 1/00-13/00 D02G 1/00-3/48 D01D 5/08

Claims (4)

(57) [Claims] 1. A cationic dye-dyeable polyester (component A) and a cationic dye-non-dyeable polyester (component B) are simultaneously discharged from a single spinneret and discharged as a filament group of each of A and B components. A single unstretched yarn of each of the A and B components obtained by mixing the A component filament group and the B component filament group by cooling the yarn and then applying an oil agent and performing air entanglement treatment between a pair of rollers. The non-stretched mixed fiber having a maximum stretch ratio (B component / A component) of 0.85 to 1.15 is stretched under the following conditions (1) to (4). A method for producing a cation mixed thick and thin fiber. (1) MDR × 0.50 ≦ TDR ≦ MDR × 0.60 (2) TDR = DR ₁ × DR ₂ (3) MDR × 0.45 ≦ DR ₁ ≦ MDR × 0.55 (4) Tg ≦ THR ≦ Tc where TDR is the total draw ratio, MDR is the maximum draw ratio of the mixed fiber undrawn yarn, DR ₁ is the first draw ratio, DR ₂ is the second draw ratio, and THR is the draw temperature of the first draw zone ( ℃), Tg
Is the lower glass transition temperature (° C) of the A and B components, T
c indicates the higher crystallization temperature (° C.) of the A and B components. 2. As the component A, ethylene terephthalate, which is a copolymer of 5-sodium sulfoisophthalic acid in an amount of 1.5 to 3 mol%, has an intrinsic viscosity of 0.1.
55-0.60 modified polyester, and as the B component, an unmodified polyester having ethylene terephthalate as a main repeating unit and an intrinsic viscosity of 0.65-0.75 is used. Manufacturing method. 3. A discharge amount ratio of the A component and the B component is from 1: 3.
The method for producing a cation mixed thick and thin fiber according to claim 1, wherein the ratio is 3: 1. 4. The method for producing a cation-mix thick fine fiber according to claim 1, wherein the spinning draft ratio [B component / A component] of the discharged yarns of the A component and the B component is 2.0 to 4.0. .