JPH11107089A - Polyester blended yarn having gloss - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyester blended yarn having a graceful gloss and a soft touch and having the higher effects than those of conventional blended yarns especially on woven fabrics. SOLUTION: This polyester blended yarn having a gloss comprises a blended yarn comprising two kinds of filament groups formed from a polyester having a solution haze of <15%, and a convex lens type filament cross sections, a filament fineness of 2-6 denier in the group A and a filament fineness of 0.5-3 denier in the group B and satisfying (the fineness of the filaments in the group A)/(the fineness of the filament in the group B) ratio C of 1.5-5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a polyester mixed yarn. More specifically, the present invention relates to a polyester mixed fiber yarn having an elegant luster and a soft texture, which is suitable for use as a woven or knitted fabric for clothing, particularly as a woven fabric.

[0002]

2. Description of the Related Art Polyester fibers are widely used for clothing having excellent mechanical properties, chemical properties, easy care properties, glossiness and the like. Particularly, the deformed cross-section yarn of polyester has a unique texture and a unique glossiness.

Hitherto, many modified cross-section yarns have been proposed to impart a unique glossiness and a special texture. For example, JP-A-37-43894, JP-A-62-10
Japanese Patent No. 4918 proposes a flat cross-section yarn exhibiting a glossy feeling, an iridescent feeling and the like. However, in the case of a conventional flat cross-section yarn, if it is made into a woven fabric, the excellent gloss and texture of the original yarn will be impaired, such as the appearance of a peta-peta feeling, and a satisfactory garment for clothing will be obtained because the touch is unpleasant. I couldn't.

Accordingly, Japanese Patent Laid-Open Publication Nos. 3-119133 and 3-167336 disclose a blend of a low-shrink flat-yarn and a high-shrink yarn as a fabric yarn having both the gloss and texture characteristics of the flat-cross-section yarn. Yarn has been proposed. However, the production process becomes complicated due to the hetero-shrinkage mixed fiber, and the curing problem after the heat treatment has not been completely solved, so that the handling is difficult.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a polyester mixed fiber yarn having a convex lens-shaped cross section having an elegant gloss and an excellent texture. .

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mixed yarn composed of two kinds of filaments formed of polyester having a solution haze of less than 15%, wherein the filament cross section is a convex lens type cross section. The fineness of the filaments of the group A is 2 to 6 denier, the fineness of the filaments of the group B is 0.5 to 3 denier, and the fineness of (the fineness of the filaments of the group A / the fineness of the filaments of the group B) It can be achieved by a glossy polyester mixed yarn characterized in that the value C satisfies the range of 1.5 to 5.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The polyester mixed fiber of the present invention must be formed of a polyester having a solution haze of less than 15%. Melt haze is a factor indicating the transparency of polyester, and the smaller the value, the higher the transparency and the higher the glossiness. Solution haze is 1
If it exceeds 5%, high gloss cannot be obtained. In order to further enhance the effects of the present invention, the solution haze of the fiber is preferably less than 12%, more preferably less than 5%.

The polyester in the present invention refers to a polyester containing ethylene glycol or 1,4-butadiol as a main glycol component and terephthalic acid or an ester thereof as a main dicarboxylic acid component.

The filament of the polyester mixed yarn of the present invention needs to have a convex lens type cross section. The convex lens-shaped cross section in the present invention has the shape shown in FIG. 1 and is an elliptical cross section in which both the short side and the long side are arc-shaped. In the case of triangular cross section yarn, flat cross section yarn, etc., high gloss can be obtained, but since the yarn cross section has a plane or a part close to a plane, the reflected light is less diffusely reflected and is reflected in almost the same direction, and the gloss is A glaring, fuzzy sheen. High gloss cannot usually be obtained with a round cross section. On the other hand, in the convex lens-shaped cross section, since the cross section of the yarn is not flat but arc-shaped, the reflected light is appropriately dispersed, so that a very high-grade mild gloss can be exhibited.
Further, the texture of the convex lens type cross-section yarn is excellent in drape property because the bending moment in the short side direction is low. In order to obtain a more elegant gloss even in the convex lens type cross section, the convex lens type cross sectional shape shown in FIG.
Convex-section yarns preferably, it is more preferable shape value D _A filament group A is a relation of D _A ≦ D _B the shape value D _B of the filaments of the group B. Here, D represents (diameter of circumscribed circle / diameter of inscribed circle) in the cross-sectional shape, and is represented by an average of the shape values of the respective filaments.

The polyester mixed yarn of the present invention is a group A
The fineness of the filaments of group B is 2 to 6 denier, and the fineness of the filaments of group B is 0.5 to 3 denier. It is necessary that the filaments of Group A have a denier of 2 denier or more in order to maintain the stiffness and tension of the woven fabric. The higher the fineness, the higher the waist and the tightness, but if it is larger than 6 denier, the coarseness becomes stronger. The filament fineness of the group A is preferably in the range of 3 to 5 denier in order to obtain a woven fabric having a rough and firm feel and excellent stiffness and tension.

The filaments of Group B need to have a denier of 3 denier or less in order to impart a soft feeling when woven. However, if the thickness is too thin, problems such as generation of fluff during weaving and anti-frosting property occur, so that 0.5 denier or more is required. The filament fineness of the group B is preferably in the range of 1 to 2.5 denier in order to obtain a high-passability and a soft-textured woven fabric.

[0012] The polyester mixed yarn of the present invention (Group A)
(The fineness of the filaments / the fineness of the filaments of the group B) needs to be in the range of 1.5 to 5. When the value C is smaller than 1.5, when woven,
As shown in FIG. 2, since the difference in fineness between the two types of filaments of the groups A and B is small, the filaments of the groups A and B take the same behavior in the woven fabric, and the cross section of the filament is parallel to the woven plane. They are all aligned, giving a glaring luster and a petafeel texture.

When the value C is larger than 5, the filaments of the group B easily enter the gaps between the filaments of the group A as shown in FIG. 3, and also in this case, the direction of the cross section of the filaments becomes uniform, resulting in glaring luster. The texture becomes petapeta.

In the case of the mixed yarn satisfying the value C in the range of 1.5 to 5, the directions of the filaments of the group A and the filaments of the group B tend to be different as shown in FIG. Dispersion of the reflected light from the short-side direction gives a milder and more elegant luster, and the random orientation of the filaments of group B results in a soft feeling with moderate tension and no peta-patty feeling.

The polyester mixed fiber yarn of the present invention is prepared by melt-spinning a polyester having a solution haze of less than 15% from, for example, a die having a discharge hole shown in FIG. 5 and applying an oil agent having high smoothness to obtain an undrawn yarn. It can be obtained by winding it once or by stretching it to make a polyester mixed fiber having a solution haze of less than 15%. At this time, it is preferable to start the blowing of cooling air at a distance of 3 to 15 cm below the surface of the spinneret for forcibly cooling the melt-spun filaments in order to reduce variation in the cross-sectional shape. In the production, the filaments of the group A and the filaments of the group B may be separately spun, and the two types may be drawn together in the drawing. However, the spinning is performed by a die having the discharge holes of the groups A and B together. The so-called single spinning is more preferable in terms of productivity. Also, when stretching, hot roll-
A method of using a hot roll type stretching machine, preheating to 75 to 100 ° C. with the first hot roll, and stretching between the second hot roll is preferable in order to reduce generation of fluff. The temperature of the second hot roll may be appropriately set so as to match the target shrinkage characteristics of the filament to be obtained.

[0016]

The present invention will be described in more detail with reference to the following examples. The physical properties in the examples were measured as follows.

A. Solution haze 1 g of a sample thoroughly washed with methanol to remove an oil agent is dissolved in 10 ml of a phenol: carbon tetrachloride = 3: 2 mixed solution at a temperature of 100 ° C., and measured with a Suga Test Machine “Haze Meter” using a 10 mm cell. did.

B. Gloss 45 degree irradiation, light receiving 4 using Suga tester automatic colorimeter
After adjusting the reference value using a magnesium oxide standard gloss plate under the condition of 5 degrees, the same yarn is used for the warp and the weft, and five plain weaves having a weaving density of 105 yarns / inch and 85 yarns / inch, respectively. The combined sample was irradiated and received light, and the glossiness was measured.

C. Glossiness Using the same sample as the sample whose glossiness was measured, the first grade (poor) to the fifth grade (best) from glare to graceful gloss with glare by visual judgment. And grade 3 or higher was accepted.

D. Using the same sample as the sample whose glossiness was measured, the sensory test result of the texture was evaluated as 1st grade (poor) to 5th grade (best).
The results were expressed in stages, and grades 3 and higher were accepted. Example 1 Four types of polyester polymers having different solution hazes were obtained by changing the amount of catalyst using germanium dioxide as a polymerization catalyst by a direct polymerization method. These polymers are discharged at a spinning temperature of 290 ° C. from a die having twelve large and small discharge holes each having a ratio of a long axis to a short axis in a shape as shown in FIG. After cooling by applying cooling air at a speed of 25 m / min and applying a highly smooth oil agent containing a fatty acid ester as a main component while controlling the oil adhesion amount to 1.0 wt%, the spinning speed is 1600 m / min. Rolled up.

The obtained undrawn yarn is preheated with a hot roll-hot roll type drawing machine at a first hot roll temperature of 87 ° C. and stretched between the second hot roll and a second hot roll temperature of 115 ° C. Heat treatment at ℃, winding speed 8
Winding was performed at 00 m / min to obtain a 50-denier 24 filament polyester mixed yarn.

The filament fineness of the obtained mixed yarn is group A
Is 3 denier, group B is 1 denier and value C is 3.0
Met. The cross-sectional shape values D were 2 for Group A and 3 for Group B. The obtained mixed fiber and its woven fabric were evaluated, and the results are shown in Table 1.

[0023]

[Table 1] Experiment No. of the present invention. 1, 2, and 3 were excellent in gloss and texture, and were clearly different from the comparative example (Experiment No. 4). Experiment no. Experiment Nos. 1 and 2 show particularly excellent gloss. 1 was the best.

Example 2 Experiment No. 1 of Example 1 1 polymer and 12 ejection holes
By using several types of bases having different ejection hole areas, ten types of convex lens-type cross-section yarns having different filament finenesses were obtained. Eight kinds of mixed yarns were obtained by combining and stretching two of them and changing various combinations. The obtained mixed fiber and its woven fabric were evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 2.

[0025]

[Table 2] Experiment No. In No. 5 (Comparative Example), since the filament fineness of Group A was small, the tenacity of the woven fabric was insufficient. On the other hand, in Experiment Nos. No. 12 (Comparative Example) had a rough texture of the woven fabric. Experiment No.
In No. 6 (Comparative Example), since the filament fineness of Group B was too small, fluff was generated and the weavability was poor. On the other hand, group B
Experiment No. 2 having a large filament fineness 11 (comparative example)
Lacked the softness of the fabric. Experiment No. of the present invention. 7,
In 8, 9, and 10, filaments having an elegant glossiness and a special texture were obtained. In particular, in Experiment No. Samples 8 and 9 had the best gloss and texture.

Example 3 In the same manner as in Example 2, five types of convex lens-type cross-section yarns having different filament finenesses were obtained. Two types of the yarns were subjected to ply yarn drawing and various combinations were changed to obtain four types of mixed fiber yarns. The obtained mixed fiber and its woven fabric were evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 3.

[0027]

[Table 3] Experiment No. No. 14 (Comparative Example) had a small C value, which is the ratio of the filament fineness of the group B to the filament fineness of the group A, so that the texture of the woven fabric exhibited a petapeta feeling similar to that of the conventional flat yarn. On the other hand, in Experiment No. In No. 15 (Comparative Example), since the C value was large, the filaments of Group B did not appear on the surface of the woven fabric, and a petapeta feeling was also exhibited. Experiment No. of the present invention. 13,1
In No. 6, a filament having an excellent gloss and a special texture without a peta-patter feeling was obtained.

Example 4 Experiment No. 1 of Example 1 In the same manner as in Example 1, except that the cross-sectional shape of the filament was changed using the polymer having the round shape, the Y shape, and the flat type having two types of discharge holes, each having a size of 12 and having 12 holes, a polyester mixed yarn was obtained. ,evaluated. Further, the shape values of the round cross-section yarn, the triangular cross-section yarn and the flat cross-section yarn were evaluated in the same manner as the shape value of the convex lens type cross-section yarn (diameter of circumscribed circle / diameter of inscribed circle). Table 3 shows the evaluation results.

[0029]

[Table 4] Experiment No. The round cross-section yarn of No. 17 (Comparative Example) had poor glossiness. Experiment No. Although the modified cross-section yarns of Nos. 18 and 19 (Comparative Example) had high glossiness, they had a fuzzy glossiness and were inferior in texture. Experiment No. 2 (the present invention)
The convex lens type cross-section yarn had the best gloss and texture.

[0030]

The polyester mixed yarn according to the present invention has an elegant gloss and an excellent texture.
Since a higher effect can be obtained as compared with the related art, the present invention provides a material suitable for applications such as women's blouses, dresses and coats.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view illustrating a cross-sectional shape of a convex lens-type cross-section yarn of the present invention.

FIG. 2 is a schematic cross-sectional view of a woven fabric when a value C of (filament fineness of group A / filament fineness of group B) is smaller than 1.5.

FIG. 3 is a schematic cross-sectional view of a woven fabric when a value C is larger than 5.

FIG. 4 is a schematic cross-sectional view of a woven fabric when the value C according to the present invention is 1.5 to 5.

FIG. 5 is a schematic view of a discharge hole for obtaining a convex lens-type cross-section yarn of the present invention.

FIG. 6 is a cross-sectional view of a conventional flat cross-section yarn.

[Explanation of symbols]

 a: diameter of inscribed circle b: diameter of circumscribed circle

Claims (2)

[Claims] 1. A mixed fiber comprising a group of two filaments formed of polyester having a solution haze of less than 15%, wherein the cross section of the filament is a convex lens type cross section and the fineness of the filament of group A is 2 to 6 denier. And the fineness of the filaments of the group B is 0.5 to 3 denier, and (the fineness of the filaments of the group A / the fineness of the filaments of the group B).
, Wherein the value C satisfies the range of 1.5 to 5. 2. The glossy polyester mixed yarn according to claim 1, wherein the cross-sectional shape of the convex lens type cross section satisfies a shape value D. D = 1.4 to 5, where D means (diameter of circumscribed circle / diameter of inscribed circle) in the cross-sectional shape.