JP3516902B2 - Polyester irregular cross section yarn - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyester modified cross-section yarn having excellent gloss and feel. For more details,
The present invention relates to a polyester modified cross-section yarn capable of obtaining a silky-tone cloth exhibiting an excellent sense of squeezing and also having a feeling of bulging and flexibility.

[0002]

2. Description of the Related Art Heretofore, in order to make synthetic fibers, particularly polyester fibers, have a silky-like feel, it has been proposed in many cases that the cross-sectional shape of the fibers should be atypical. For example,
It has been proposed to use a triangular shape to improve luster, a multi-lobal shape to improve dryness, and a mushroom shape to improve dryness and squeaky feeling. It has also been proposed to form a different-shrink mixed yarn using such a modified cross-section yarn to give a swelling feeling and flexibility (soft feeling) to the fabric. However, such conventional silky polyester fibers are often similar to the silkworm silk texture among the silk, and the rough crease feeling of the silk woven or knitted fabric classified into wild silk silk, especially tussah silk. It is still insufficient in terms of, and neither the swelling feeling, the flexibility and the feeling of lightness can be satisfied at the same time.

On the other hand, as a polyester fiber from which a cloth exhibiting a silky-tone surface touch and a tingling sensation can be obtained, in JP-A-56-20638, polyester blended with an organic sulfonic acid metal salt is melt-spun and stretched, Then, a method has been proposed in which alkali reduction treatment is performed to form fine pores arranged in the fiber axis direction on the fiber surface. However, even if this method is applied to the above-mentioned conventional cross-section yarns such as triangles and mushrooms, it is not possible to satisfy at the same time the rough crease feeling of mulberry silkworm and the characteristics such as swelling feeling, soft feeling and light feeling. Instead, new technology was expected.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and its object is to provide characteristics such as silk luster, swelling, flexibility, and lightness while exhibiting a rough feeling of creases. Another object of the present invention is to provide a polyester fiber capable of obtaining an excellent silky fabric.

[0005]

According to the study by the present inventors, the above-mentioned problem is that "the cross-sectional shape of a single fiber is extended from a triangular portion (A) and one apex of the triangular shape. Flat
It has a shape consisting of a flat protrusion (B) ,
The extension direction is on the two sides of the triangular part connected to the apex.
A polyester modified cross-section yarn that is in the direction of the bisector of the apex angle that is sandwiched more and that satisfies both of the following formulas (1) and (2). It has been found that (1) 0.7 ≦ L1 / L2 ≦ 3.0 (2) 3.0 ≦ h2 / h1 ≦ 10.0 L1: Distance from the connecting point between the triangular portion and the protruding portion to the other end of the protruding portion. L2: The distance between the connecting point of the triangular portion and the protruding portion and the opposite side of the triangular portion to the connecting point. h1: the width of the protrusion. h2: The length of the opposite side of the triangular portion with respect to the connection point between the triangular portion and the protruding portion.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The polyester in the present invention is
Polyethylene terephthalate having an ethylene terephthalate unit as a repeating unit is preferably used, but if necessary, a small amount of the third component (usually 15 mol% or less, preferably 10 mol% or less, particularly preferably 10 mol% or less, based on all repeating units) is particularly preferable. (5 mol% or less) Copolymerized copolyester may be used, or a matting agent and other additives may be added. Among them, the organic sulfonic acid metal salt represented by the following formula is 0.5 to 2.5% by weight (polyester weight basis),
Preferably, the polyester added with 0.8 to 1.2% by weight can form fine pores arranged in the fiber axis direction on the surface of the fiber when subjected to alkali weight reduction treatment, and the dry feeling and the feeling of dryness are improved, and the silky silkworm is extremely silky. It is preferable because a fabric similar to the above can be obtained. RSO ₃ M (where R is an alkyl group having 3 to 30 carbon atoms or 7 carbon atoms)
To 40 aryl groups or alkylaryl groups, and M represents an alkali metal or an alkaline earth metal. )

In the above formula, when R is an alkyl group or an alkylaryl group, the alkyl may have a straight chain or a branched side chain. Particularly, an alkyl sulfonic acid metal salt in which R is an alkyl group is preferable from the viewpoint of compatibility with polyester. M is an alkali metal such as sodium, potassium or lithium, or an alkaline earth metal such as calcium or magnesium.
Potassium is preferred.

Specific examples of such an organic sulfonic acid metal salt include sodium stearyl sulfonate, sodium octyl sulfonate, sodium lauryl sulfonate and the like.

Next, the cross-sectional shape of the single fiber in the present invention is a shape composed of a triangular portion (A) and a flat protrusion (B) extending from one apex of the triangle. Therefore, it is essential that both the relationships of the expressions (1) and (2) are satisfied.

Here, when the extending position of the protruding portion (B) is different from the apex of the triangular shape and, for example, it extends from the center of the triangular side, it becomes difficult to stably produce the yarn, and When the protruding portions extend from a plurality of vertices, it is not preferable because it is difficult to stably produce the yarn and the texture of the obtained fabric is not silkworm-like.
Further, if the shape of the protruding portion is not flat, for example, a shape such as a round cross section is not preferable because the obtained cloth has a poor sense of creaking. In addition, the flat shape here does not need to be uniform over the whole thickness, and one part may be thicker than another part. In short, the ratio (L1 / h1) of the length (L1) and the width (h1) of the protrusions described later may be 2 or more, and particularly 5 or more. When this ratio is less than 2, it cannot be said to be flat, and the resulting fabric lacks the feeling of crease and softness, which is not preferable.

Further, the extending direction of the projecting portion (B) from the triangular portion (A) is within the angle defined by the lines extending from the two sides of the triangular shape sandwiching the apex angle, and the apex angle Equidistant line
It is suitable.

The shape of the portion (A) is not particularly limited as long as it is a substantially triangular shape, and it is arbitrary. Whether the vertex is round, the side is bulged outward, or the inside is dented. Good. Further, the shape may be any of an equilateral triangle, an isosceles triangle, and an isosceles triangle. On the other hand, when the shape of the portion (A) is a shape other than a triangle, such as a round shape or a hexagonal shape, the resulting cloth has an insufficient sense of crease and the object of the present invention cannot be achieved. It should be noted that the triangular portion (A) may have a hollow portion, and the presence of the hollow portion is preferable because the bulging feeling and the light weight feeling are further improved. However, if the hollow ratio becomes too large, the stable spinnability tends to deteriorate, so the hollow ratio for the triangular portion (A) is 15% or less, preferably 3 to 10%. is there.

Next, the above formula (1) is represented by the triangular portion (A).
And the length of the flat protrusion (B) are defined, which is important for achieving a sense of crease, softness and bulge of the obtained fabric, and particularly L1 / L2. Is preferably in the range of 1.5 to 2.5. If this value is less than 0.7, it will be difficult to achieve the texture and softness of the obtained fabric as a whole, while if it exceeds 3.0, it will be difficult to stably produce yarn. At the same time, the swelling feeling of the obtained cloth is also lost, which is not preferable.

The above formula (2) is expressed by the triangular portion (A).
And the width of the flat protrusion (B), which is important for achieving a feeling of swelling of the obtained fabric, and in particular h2 / h1 is in the range of 4.0 to 7.0. It is preferable to be within. When this value is less than 3.0, the swelling feeling of the obtained fabric is insufficient, while 10.0
When it exceeds, the ejection stability at the time of spinning is lowered, and it becomes difficult to stably produce a yarn, which is not preferable.

The present invention will now be described in more detail with reference to the drawings. FIG. 1 is a schematic diagram for explaining the cross-sectional shape of a single fiber of a polyester modified cross-section yarn of the present invention. In FIG. 1, a midpoint O between two points where the outer periphery of the triangular portion (A) and the outer periphery of the flat protrusion portion intersect is defined as a connecting point between the triangular portion and the flat protrusion portion. The distance from this connecting point to the other end of the protruding portion is the length L1 of the protruding portion, and the distance from the connecting point to the opposite side of the triangular portion (A) is L2.
And When the opposite side bulges outward or is recessed inward, the distance to a straight line which is parallel to a straight line connecting two triangular vertices other than the connecting point and which is in contact with the opposite side is L2.

Next, the maximum width of the flat protrusion in the direction perpendicular to the extending direction of the protrusion (B) is defined as the width h of the protrusion (B).
1, and the triangular portion (A) is a straight line perpendicular to the opposite side.
The distance between the two straight lines in contact with is the opposite side length h2.

Although FIG. 1 shows a cross-sectional shape that is substantially symmetrical, the modified cross-section yarn of the present invention is not necessarily limited to this, and may be bilaterally asymmetric.

FIG. 2 is a schematic view showing the shape of the discharge holes of the spinneret used for producing the modified cross-section yarn of the present invention, but the present invention is not limited to this.

The modified cross-section yarn of the present invention can be produced by a conventional spin-drawing method using the spinneret having the above-mentioned discharge holes. That is, the above polyester is melt-discharged from the spinneret at 280 to 300 ° C.,
After applying an oil agent to the spun yarn that has been solidified by cooling, and applying interlacing with an interlacing device, if necessary,
The undrawn yarn is once wound around a winder via a pair of take-up rollers set at room temperature. Next, the obtained undrawn yarn is drawn at 80 to 110 at a drawing speed of 600 to 1400 m / min.
It is obtained by drawing at a draw ratio of 1.5 to 3.0 times through a preheating roller heated to ℃ and a non-contact type heater set at 170 to 220 ℃, and further imparting interlace as necessary. .

The modified cross-section yarn according to the present invention has a single fiber fineness of 1.67 to 4.44 dtex (1.5 to 4.0).
Denier), the total fineness of the yarn is 55.6 to 167 dtex
It is preferably (50 to 150 denier), and the boiling water shrinkage ratio is suitably in the range of 5.0 to 10.0%.

In order to manufacture a fabric using the modified cross-section yarn of the present invention as described above, appropriate twisting may be performed as necessary and woven or knitted into a desired structure. By subjecting the obtained fabric to alkali reduction treatment, if necessary, a fabric having an excellent feeling of squeezing, swelling, flexibility, and lightness, which cannot be exhibited by a conventional woven or knitted fabric, can be obtained.

In the present invention, it is not preferable to weave and knit into a complicated structure because it is intended to have a light weight and a feeling of texture, and a plain weave or a modified structure thereof, a simple twill weave or a modified structure thereof, a satin weave are preferable. It is preferable to woven and knit. Further, the proportion of the modified cross-section yarn of the present invention in the cloth does not necessarily have to be 100%, but the larger the proportion is, the more preferable it is in order to obtain excellent feeling of creases, swelling, flexibility and lightweight feeling.

[0023]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Example 1 0.6% of sodium alkylsulfonate having 8 to 20 carbon atoms and 14 average carbon atoms was used.
Polyethylene terephthalate having an intrinsic viscosity (measured with an orthochlorophenol solution at 35 ° C.) of 0.61 in a weight percentage of 0.61 was melted and discharged from a spinneret having spinning holes as shown in FIG. 2, and the discharged yarn was cooled and solidified. 1400m / after applying oil agent and then applying interlace
It was wound and wound at a speed of a minute. The obtained undrawn yarn is preheated with a roller temperature of 87 ° C and a heat set heater (non-contact type).
Temperature 200 ° C, draw ratio 2.3 times, draw speed 800 m /
83.3d with interlacing after stretching in minutes
A tex (75 denier) / 24 filament yarn was obtained.

The obtained yarn is used as a warp and a weft, and woven in a habutae, and subjected to a conventional method such as cleanness, heat setting, alkali weight reduction processing (weight reduction rate 15%), and dyeing to give a plain dyed fabric. Obtained. The evaluation results are shown in Table 1.

The evaluation items and the comprehensive evaluation were ranked in three grades of extremely good (excellent), good (good), and poor (impossible). The overall evaluation was ranked by taking into consideration the softness (flexibility) of the cloth.

[Examples 2 to 3 and Comparative Examples 1 to 6] The same procedure as in Example 1 was carried out except that the cross-sectional shape was changed as shown in Table 1. The results are also shown in Table 1.

[0028]

[Table 1]

[0029]

From the polyester modified cross-section yarn of the present invention,
It is possible to obtain a silky-like fabric that exhibits a rough creaking texture that has not been found in conventional modified cross-section yarns, and at the same time has excellent characteristics such as silk luster, bulge, flexibility, and lightweight. The target value is extremely large.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a cross-sectional shape of a polyester modified cross-section yarn of the present invention.

FIG. 2 is a schematic view showing an example of a spinneret discharge hole used for producing a polyester modified cross-section yarn of the present invention.

Continuation of the front page (56) Reference JP 62-21827 (JP, A) JP 56-20638 (JP, A) JP 1-239159 (JP, A) JP 60-167923 (JP , A) JP 63-196708 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D01F 6/62 D01F 6/92 D06M 11/38 D01D 5/24 D01D 5/253

Claims (3)

(57) [Claims] 1. A flat cross-sectional shape of a monofilament extending from a triangular portion (A) and one vertex of the triangular shape.
A protruding portion (B), and the extension of the protruding portion.
The outgoing direction depends on the two sides of the triangular part connected to the apex.
A polyester modified cross-section yarn which is in the direction of the bisector of the apex angle to be sandwiched and which satisfies both of the following expressions (1) and (2). (1) 0.7 ≦ L1 / L2 ≦ 3.0 (2) 3.0 ≦ h2 / h1 ≦ 10.0 L1: Distance from the connecting point of the triangular portion and the protruding portion to the other end of the protruding portion. L2: The distance between the connecting point of the triangular portion and the protruding portion and the opposite side of the triangular portion to the connecting point. h1: the width of the protrusion. h2: The length of the opposite side of the triangular portion with respect to the connection point between the triangular portion and the protruding portion. 2. The polyester modified cross-section yarn according to claim 1, wherein the triangular portion (A) has a hollow portion. 3. The polyester cross-section according to claim 1, wherein the polyester contains 0.5 to 2.5% by weight (based on the weight of polyester) of an organic sulfonic acid metal salt represented by the following general formula. yarn. RSO ₃ M (wherein R represents an alkyl group having 3 to 30 carbon atoms or an aryl group or alkylaryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal).