JP2001200439A - Hetero-dyeable polyester combined filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject combined filament yarn comprising at least two kinds of filament groups differing in dyeability from each other and having functionality including clear grain- or melange-toned appearance, dry feeling, lightweight feeling and water absorptivity. SOLUTION: This hetero-dyeable polyester combined filament yarn comprises at least two kinds of filament groups differing in dyeability from each other; wherein at least one of the filament groups consists of modified cross-section filaments with multifoliate sectional shape having >=3 recesses and a heteroform degree of 1.7-6.0. Use of this multicolor-dyeable blended filament yarn enables water absorptiviy and lightweight feeling as well as moire-toned appearance to be afforded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester hetero-dyed mixed yarn comprising at least two kinds of fibers having different dyeing properties, at least one of which is a fiber of irregular cross section. The present invention relates to a polyester heterochromatic mixed fiber having functional properties such as dry feeling, light weight feeling, and water absorption in addition to the unique appearance of the above.

[0002]

2. Description of the Related Art A mixed yarn composed of a plurality of synthetic fiber filament yarns having different dyeing properties is obtained by weaving and knitting and then dyeing, whereby a dyed portion appears non-uniformly and a heather-like appearance can be obtained. Conventionally, various proposals have been made.

[0003] In order to obtain a yarn for heather-finished knitted fabric, for example, Japanese Unexamined Patent Publication No. 49-72485 discloses that two kinds of yarns spun by spinning blending are entangled and then heat-treated. Method for obtaining marbled fibers, and Japanese Patent Application Laid-Open No. 50-116708
The publication uses two types of polymers having different dyeing properties,
A method of spinning and blending a yarn composed of different kinds of polymers and a core-sheath composite fiber using two kinds of polymers.
Japanese Patent No. 6744 discloses a method in which two kinds of yarns having a difference in orientation are mixed in a stretching step, and a heather appearance is obtained by utilizing a difference in light and dark dyeing properties. Although it is possible to obtain a woven or knitted fabric having a heather-like or frost-falling tone by using the mixed fiber according to these proposals, it is not possible to impart functions such as a clear heather feeling, a dry feeling, a light weight feeling, and water absorbability.

Japanese Patent Application Laid-Open No. 7-34341 discloses a method of improving the water absorption by mixing fibers having different cross-sectional shapes to exhibit a capillary phenomenon. Although the mixed fiber obtained by this proposal certainly has improved water absorption, it cannot be given a heather-like appearance because it is composed of a single polymer.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a polyester heterochromatic mixed fiber which has functions such as a dry feeling, a light feeling and a water absorption in addition to a clear heath tone which cannot be achieved by the above-mentioned prior art. To provide yarn.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mixed fiber comprising at least two kinds of fiber groups having different dyeing properties, wherein at least one of the fiber groups has three or more recesses. It can be achieved by a polyester heterodystable mixed fiber, which is a modified cross-section fiber having a multi-lobed cross-sectional shape and having a degree of heterogeneity of 1.7 to 6.0.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

[0008] In order to obtain a heather tone, it is necessary that the polyester heterochromatic mixed fiber yarn of the present invention is composed of at least two kinds of fibers having different dyeing properties. Unless it is composed of at least two kinds of fiber groups having different dyeing properties, a heather feeling cannot be obtained. Preferably, among the at least two fiber groups constituting the polyester heterochromatic mixed fiber, the fiber group (A) has a ratio of the S component to the ester component (hereinafter referred to as S fraction) of 0.15 to 1 in all cases. It is preferable to obtain a copolymerized polyester obtained by copolymerizing isophthalic acid having a metal sulfonate group or a derivative thereof so as to be 0.000% by weight. Further, polyester or polyethylene terephthalate may contain diethylene glycol or the like in the main chain as long as it is by-produced in the production process. Further, another kind of fiber group (B) is preferably a polyester comprising 85% by weight or more of ethylene terephthalate.

[0009] The polyester heterochromatic mixed fiber yarn of the present invention contains a matting agent in the fiber group (B) in order to develop a clearer heather tone and a frosting tone and express a calm heather appearance. The content is preferably from 0.3% by weight to 8.0% by weight, more preferably from 1.5% by weight to 6.0% by weight, especially the fiber group (B ) Is more emphasized, so that the heather tone becomes clearer, which is preferable. Matting agents include titanium oxide, zirconium oxide, magnesium oxide, aluminum oxide, silicon oxide, antimony oxide, zinc oxide, lead tungstate,
Among them, calcium tungstate, calcium carbonate and the like can be mentioned, and among them, titanium oxide, silicon oxide, zinc oxide and calcium carbonate are preferable. The average particle size of the matting agent to be added is preferably 1.0 μm or less, more preferably 0.7 μm or less, from the viewpoint of dispersibility. Furthermore, the maximum particle size is preferably 0.5 μm or less, and more preferably 0.3 μm or less, from the viewpoint of spinning properties.

In the present invention, the isophthalic acid having a metal sulfonate group or its derivative used in at least one fiber group (A) constituting the polyester heterodystable mixed fiber is dimethyl (5-sodium sulfo) iso. Phthalate, bis-2-hydroxyethyl (5-sodium sulfo) isophthalate, bis-4-hydroxybutyl (5-sodium sulfo) isophthalate, dimethyl (5-lithium sulfo) isophthalate and the like can be exemplified. 5-Sodium sulfo) isophthalate and bis-2-hydroxyethyl (5-sodium sulfo) isophthalate are preferred.
Further, components other than polyethylene terephthalate contained in the fiber group (B) which is difficult to dye with a cationic dye are not particularly limited as long as they do not impair the spinnability.

[0011] In the polyester heterochromatic mixed fiber yarn of the present invention, in order to impart dry feeling, light weight feeling and water absorption,
It is necessary that the cross-sectional shape of at least one of the at least two types of fiber groups be a multi-lobed cross-sectional shape having three or more concave portions. For example, a multi-leaf cross-sectional shape as shown in FIG. When the number of recesses in the cross-sectional shape is less than 3, there are few voids formed between the fiber single yarns, so that water absorption due to the capillary phenomenon, lightness due to the voids between the fiber single yarns, and dryness due to the multi-leaf cross section are exhibited. I can't do that. In order to further exhibit the effects of dryness, lightness, and water absorption, it is preferable to have a multi-lobed cross-sectional shape having four or more concave portions.

Further, among the at least two fiber groups constituting the polyester heterochromatic mixed fiber of the present invention, the irregular cross-section fibers constituting at least one of the fibers have a degree of irregularity of 1.7 to 6.0.
It is necessary to By setting the degree of irregularity to 1.7 or more, voids between single fiber fibers can be formed, and water absorption can be imparted. Further, by increasing the number of voids, it is possible to impart a lightweight feeling. However, if the degree of irregularity is too large, the fibers may be broken or fibrillated, resulting in poor weaving or deterioration in product quality. Therefore, the degree of irregularity needs to be 6.0 or less. Further, a clear feeling of heat can be obtained due to the difference in cross-sectional shape between the two fiber groups. The degree of irregularity is preferably 2.0 to 4.0 in order to further exhibit the effects of water absorption and lightness and to maintain the weaving property. The degree of irregularity referred to in the present invention is determined by the following method.

(Degree of irregularity) = L1 / L2, where L1: diameter of circumscribed circle of fiber cross section L2: diameter of inscribed circle of fiber cross section In order to achieve this, it is preferable that the fiber mixture ratio of the fiber group having an irregular cross-sectional shape is 30 to 80% of the total fineness. By setting the mixed fiber ratio of the fiber group having the irregular cross-sectional shape to 30 to 80% of the total fineness, a clear heather tone can be obtained, and a dry feeling, a light weight feeling, and water absorbency can be further exhibited.

The fiber mixture ratio of the fiber group having an irregular cross-sectional shape is 3
When the content is 0 to 80%, a space between fibers for obtaining water absorption is sufficiently formed, and the ratio of the irregular cross-sectional shape is sufficient to develop a clear heather tone. In order to further exert the effects of the present invention, the fiber mixture ratio of the fiber group having an irregular cross-sectional shape is 4
5-70% is preferred.

The polyester heterochromatic mixed yarn of the present invention is preferably subjected to a fluid entanglement treatment in order to improve the processability in knitting and weaving, and the preferable entanglement degree is 5 to 60 yarns / m2. It is. In particular, the tendency to be a mixed fiber is high, and by setting the degree of entanglement to 60 yarns / m or less, not only the yarn formability, weaving property and knitting property can be improved, but also a single yarn of each fiber group. It is possible to clarify the parting condition of each other, which has the effect of clarifying the sense of heather. The degree of entanglement is preferably from 15 to 40 yarns / m in order to improve the spinning, weaving and knitting properties. The method of measuring the degree of confounding is described in JP-A-48-28708.
In accordance with the method described in the official gazette.

As the method for producing the polyester heterochromatic mixed fiber yarn of the present invention, it is possible to use any of the so-called spinning fiber mixing method and the post-fiber mixing method in which spinning and drawing are performed separately. As the spinning fiber mixing method, a method of simultaneously spinning two different polymers from one spinneret, a method of spinning a single-component polymer from separate spinnerets, and combining and winding at the time of winding, a post-blending method Examples include a method in which two kinds of polymers are separately wound and wound, and then combined in a drawing step. However, in order to improve the production cost and the separation of the fiber group in the mixed fiber, different from one spinneret is used. A method of simultaneously spinning two polymers is preferred.

By applying the polyester heterochromatic mixed fiber yarn of the present invention to a high-order processing technology, it is possible to improve the heat-treated, dry, light-weight, and water-absorbing feeling characteristics, which are the objects of the present invention. The high-order processing techniques include ordinary stretching, T
& T stretching, air processing, false twist, and the like.

[0018]

The present invention will be described in more detail with reference to the following examples. Each characteristic value in the examples was obtained by the following method.

A. Intrinsic viscosity [η] This is a value measured in orthochlorophenol (25 ° C.).

B. Water Absorbency The lower end of a strip sample having a length of 12 cm and a width of 1 cm was immersed in distilled water at 20 ± 2 ° C. by a birec method, and the water absorption height (cm) after 10 minutes was measured.

C. Hand feeling characteristics (mottle feeling, dry feeling, light weight feeling) For each item, a sensory test was conducted by comparing the sample with the reference sample, and "very good" was XX, "excellent" was OO, " “Normal” was indicated by a four-point scale of “△”, and “Poor” was indicated by a four-point scale of “×”. As a reference sample, a 167 dtex-72 fill drawn yarn having a round cross-section made of polyethylene terephthalate was used. .

D. Operability Evaluated based on the occurrence of yarn breakage and tarmi when each level (200 yarns) was processed.

Thread breakage, Talmi generation rate less than 2% ○ Thread breakage, Talmi generation rate of 2% or more and less than 5% ○ Thread breakage, Talmi generation rate of 5% or more and less than 10% △ Thread breakage, Talmi generation rate of 10% or more × Examples 1 to 5 and Comparative Examples 1 and 2 As a polymer for forming a polyester fiber group (A) which can be easily dyed with a cationic dye, 5-sulfoisophthalic acid is used as the polymer in polyethylene terephthalate. Of a modified polyester having an intrinsic viscosity [η] of 0.68 and a polyester fiber group (B), which is difficult to dye with a cationic dye, are produced by mixing titanium oxide at 2.0
% Of polyethylene terephthalate having an intrinsic viscosity [η] of 0.65 from the same spinneret.
After drawing at a speed of 00 m / min, the film is stretched and entangled by 20 to 30 minutes.
And wound up.

Using the obtained mixed yarn, the number of concave portions in the cross-sectional shape (hereinafter referred to as the number of concave portions), the mixing ratio of the fiber group (A), and the degree of irregularity were changed to prepare a woven fabric. Table 1 shows the properties of the obtained woven fabric.

In Examples 1 and 2, the mixing ratio of the heterochromatic fiber group was good and an extremely excellent heat feeling was obtained. Further, since the irregularity was high and the number of concave portions was three, excellent dryness was obtained. It had a feeling, lightness and water absorption. Furthermore, there was no problem in operability.

In Example 3, although the mixture ratio of the heterochromatic fiber group was slightly biased, the heather was slightly gentle. However, since it had a high degree of irregularity and three concave portions, excellent dryness and lightness were obtained. And it was water-absorbing, and there was no problem in operability.

Example 4 is a woven fabric having an excellent blending ratio of the heterochromatic fiber group and having an excellent feeling of heat. Since it has a high degree of irregularity and four recesses, it has excellent dry feeling and light weight. Although there was a feeling and water absorption, the degree of irregularity was slightly high, fibrillation of fibers was slightly observed, and operability was slightly lowered.

In Example 5, the fiber mixing ratio, the degree of irregularity, and the number of concave portions are very suitable for exhibiting the effects of the present invention, and the material has extremely excellent heat, dry, light and water absorbing properties. Met. Furthermore, there was no problem in operability.

In Comparative Example 1, the fiber mixture ratio of the fiber group easily dyeable with the cationic dye was too high to give a clear feeling of heat, and the fiber mixture ratio was low despite the high degree of irregularity. Dry feeling, light weight feeling and water absorption were not obtained. Furthermore, since the degree of irregularity was too high, the fibers were broken, causing a problem in operability.

Comparative Example 2 was a mixed fiber having only a round cross section. The mixed fiber ratio was suitable, and a feeling of heather could be obtained. However, since there was no irregularity, a dry feeling, a light feeling and a light feeling were obtained. It had no water absorption. Examples 6 to 10 and Comparative Examples 3 and 4 The fiber group (A) and the fiber group (B) were subjected to the respective fiber-forming conditions, and the fiber group (B) was deformed and the mixed fiber was entangled (pieces / piece).
A fabric was prepared by changing m), and the properties of the obtained fabric are shown in Table 2.

In Example 6, the fiber group (A) and the fiber group (B)
The mixture ratio was good and entangled, so that an excellent feeling of heather was obtained. In addition, since the degree of irregularity was high and the number of recesses was four, it had extremely excellent dry feeling, light weight feeling and water absorption. However, the confounding was somewhat low, and some tarmi occurred, resulting in a slightly lower operability.

In Example 7, since the fiber mixture ratio of the fiber group was good, the degree of irregularity was high, and the number of concave portions was three, an excellent heat feeling was obtained.
It has dryness, lightness and water absorption. In addition, since there was confounding, no tarmi was seen, and there was no problem in operability.

In Example 8, since the mixing ratio, irregularity, number of recesses, and confounding are suitable for further exhibiting the effects of the present invention, extremely excellent heat, dry, light and water absorbing properties are obtained. It was operable.

In Example 9, since the fiber mixture ratio was good, the degree of irregularity was high, and the number of concave portions was 4, extremely excellent heat, dry, light and water-absorbing properties were obtained. Due to the small amount, tarmi was generated and the operability was slightly low.

In Example 10, the mixture ratio was good, the degree of irregularity was high, and the number of recesses was four.
Although it has a light weight and water absorption, it is somewhat entangled,
Fluff and thread breakage occurred, and the operability was somewhat low.

Comparative Example 3 has a suitable blending ratio, but has a low degree of irregularity and thus has a heather tone, but has no dry feeling, light weight feeling and water absorption. Tarmi occurred, resulting in poor operability.

In Comparative Example 4, although the blending ratio was suitable, the degree of irregularity was low, and although there was a feeling of heat, there was no dry feeling, light weight, and no water absorption. There were many fluffs and the operability was poor.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

According to the present invention, a woven / knitted polyester hetero-dyed mixed yarn having a water absorbing property and a light weight feeling is obtained in addition to the heat-sensing feeling when a conventional polyester hetero-dyed mixed fiber is used as a woven or knitted fabric. Obtainable. In addition, this woven or knitted fabric is suitable for various uses, including apparel applications, and not only provides a woven or knitted fabric having excellent quality, but also provides a functional yarn such as dry touch and lightweight feeling. It is possible.

[Brief description of the drawings]

FIG. 1 is a view showing an example of an irregular cross-section fiber of the present invention.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L035 AA08 BB32 BB33 CC11 DD02 DD16 EE20 JJ05 4L036 MA05 MA20 MA24 MA33 MA39 PA33 PA46 UA01 UA16 4L045 AA05 BA03 BA10 BA15 BA41 BA57

Claims (4)

[Claims] 1. A mixed fiber comprising at least two types of fiber groups having different dyeing properties, wherein at least one of the fiber groups has a multi-lobed cross-sectional shape having three or more concave portions. A polyester heterochromatic mixed fiber having an irregularity of 1.7 to 6.0. 2. A polyester heterochromatic mixed fiber yarn according to claim 1, wherein the mixed fiber ratio of the fiber group having a multi-leaf cross section is 30 to 80% of the total fineness. 3. A fiber group (A) of the at least two fiber groups constituting the polyester heterodystable mixed fiber comprises isophthalic acid having a metal sulfonate group or a derivative component thereof as a total ester component. 0.15 to 1.00
3. The polyester metachromatic property according to claim 1, wherein the other polyester fiber group (B) is a polyester comprising 85% by weight or more of ethylene terephthalate. Mixed yarn. 4. The polyester heterochromatic mixed yarn according to any one of claims 1 to 3, wherein the degree of entanglement is 5 to 60 yarns / m.