JPH11286848A - Polyester high density fabric - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a polyester high-density woven fabric having excellent water pressure resistance and softness, and also having noiselessness. A woven fabric using a polyester multifilament having a flatness of a cross section of a single yarn of 2 to 4 and a single yarn fineness of 0.5 to 2d and a yarn fineness of 30 to 90d at least for a warp, A high-density polyester fabric having a total cover factor of the history of the fabric of from 2,000 to 3,000.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high-density polyester fabric, and more particularly, to a high-density polyester fabric having excellent softness and water resistance.

[0002]

2. Description of the Related Art Conventionally, sports clothing such as skis and athletic has been required to have both functions of moisture permeability and waterproofness, and in order to meet these requirements, water repellency has been achieved by a resin coating method or a laminating method. A method of forming a microporous resin layer on the processed woven fabric surface, a method of applying a water-repellent treatment to a woven fabric obtained by weaving ultrafine fibers at a high density, and using a high shrink yarn to improve the woven fabric density in a dyeing process Various methods have been proposed, such as a method using a composite mixed fiber or a core-sheath type composite yarn (Japanese Patent Application Laid-Open No. 9-170175, Japanese Patent Application Laid-Open No.
305275, JP-A-62-238842, JP-A-9-59847 and the like).

A typical example is disclosed in Japanese Patent Application Laid-Open No. 9-17017.
No. 5 proposes a woven fabric having improved windproofness and water pressure resistance by using a super-fine multifilament having a round cross section of a single yarn fineness of 0.5 denier or less and having a sum of cover factors of warp and weft of 2200 or more. Have been. However, in the high-density fabric using the ultrafine multifilament, a good water pressure can be obtained, but the water absorption quick-drying property is inferior, lacking in crispness, it becomes a damp texture rather than a soft texture, and in the outer field. No suitable thing is obtained. Also, Japanese Patent Application Laid-Open No. 62-238842 describes that 2.0
A woven fabric comprising a mixed multifilament of an 8-denier W-shaped irregular cross-section filament and a 0.28 denier ultra-fine round cross-section filament has been proposed. However, although the water pressure resistance is improved by using the fine denier filament, a soft texture cannot be obtained because the thick denier filament is used at random.

As described above, in the conventional method, 600 mmH
_TwoO or more, preferably 1000 mmH _TwoHigher than O
Bell water pressure and soft texture suitable for outer clothing
Is difficult to satisfy at the same time.
As a fabric with the above level of high water resistance achieved
Also unpleasant when the fabric specific to high density fabrics rubs
The generation of noise noise cannot be prevented. More woven
Problems such as a decrease in tear strength due to densification of the tissue
There is a drawback that it is easy to pull.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and has excellent water pressure resistance and softness.
Another object of the present invention is to provide a polyester high-density woven fabric having noiseless properties.

[0006]

The invention claimed in the present application is as follows. (1) The flatness of the single yarn cross section is 2 to 4 and the single yarn fineness is 0.
A woven fabric using polyester multifilaments having a yarn fineness of 30 to 90 d and a yarn fineness of 30 to 90 d for at least a warp yarn, and having a total cover factor of the woven fabric of 200 or more.
A polyester high-density woven fabric, which is 0 to 3000.

Here, the flatness refers to a value obtained by drawing a rectangle circumscribing the cross section of a single yarn and dividing the long side of the rectangle by the short side. The total cover factor (CF) is defined as the number of the warp or weft arranged per 2.54 cm in the direction perpendicular to the warp or weft of the woven fabric, as the respective yarn densities. CF = (warp density × √warp) Denier) + (Weft density × √
(Weft denier).

[0008]

According to the present invention, weaving is carried out using multifilaments having a specific yarn fineness composed of single yarns having a specific single yarn cross-sectional flatness and single yarn fineness, and particularly, a warp in a woven fabric structure. Most of the single yarns that compose are overlapped in a certain direction of the flat cross section in a weft and filled manner, and each single yarn can be woven as if in a "brick-stacked form", so that excellent water pressure resistance is obtained. ,
Excellent soft texture and noiselessness can be exhibited.

The reason why such an effect can be obtained is not clear, but the single-layered brick structure increases the degree of filling of the single yarns at the intersections of the fabric structure, thereby improving the water pressure resistance. It is considered that when a force such as bending is applied to the fabric, the single yarns constituting the fabric are easily moved in the same direction, a soft feeling is obtained, and noiselessness is exhibited.
The reason why the “brick-stacked form” is formed is not clear, but it is presumed that the warp tension during weaving and the vertical motion of the reed of the loom contribute to the rearrangement of the single yarn in the multifilament. In addition, "weave brick form" after weaving
Can be held until the final product without breaking its form even after the subsequent scouring and dyeing finishing processes.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a micrograph of a warp cross section of a polyester high-density woven fabric (process: 50d / 30f polyester W-shaped cross section fiber (SWS)) which is an example of the present invention. In FIG. 1, the polyester high-density woven fabric is a plain woven fabric woven with warps 1 and wefts 2 and
Is a multifilament composed of a plurality of W-shaped single yarns 3, each of which is rearranged by warp tension at the time of weaving or opening movement of a reed of a loom, etc., and substantially regularly in a certain direction. It has the structure of "brick-stacked form" which is arranged side by side.

The polyester multifilament used in the present invention has a yarn fineness of 30 to 90 d, preferably 50 to 75 d, and has a flatness of a single yarn cross section of 2 to 4, preferably 2 to 4 d. 0.5 to 3.5, and the single-fiber fineness is 0.5 to 2d, preferably 1.0 to
1.7d. Multifilament yarn fineness is 30d
If it is less than 90%, the tear strength of the woven fabric cannot be obtained, and if it exceeds 90d, the texture of the woven fabric becomes hard and the feeling of ground thickness increases.

On the other hand, if the flatness of the cross section of a single yarn is less than 2, the above-mentioned brick-laying form cannot be obtained, and if the flatness exceeds 4, the stable spinning cannot be performed at the yarn production stage. The flatness here means a value obtained by drawing a rectangle circumscribing the W-shaped cross section of a single yarn and dividing the long side L by the short side H. The shape of the single yarn cross section is not particularly limited as long as it is an irregular cross section that satisfies the flatness, but a W-shaped cross section is preferable from the viewpoint of facilitating the formation of the brick-stacked form. The opening angle of the W-shaped cross section indicates the opening angle of the lower concave portion of the single yarn of the W-shaped cross section, that is, the angle when a lead line is drawn from both ends of the lower concave portion. This means the sharpness of the sectional shape, and the larger the angle, the flatter the shape. Specifically, the angle is preferably from 100 to 150 degrees, and more preferably from 120 to 140 degrees. Further, if the single yarn fineness is less than 0.5 d, the effect of the flat cross section is reduced and a brick-layered structure cannot be obtained, and if it exceeds 2 d, the gap between the single yarns increases, and high water pressure resistance cannot be obtained, The texture becomes hard.

The polyester used for the polyester multifilament preferably has a repeating unit of ethylene terephthalate of 90 mol% or more, more preferably polyethylene terephthalate. In addition, the polyester multifilament can be produced using a known melt spinning device, but from the viewpoint of stably spinning a filament having a flat cross section and a fineness of single yarn fineness, using a polyester having a high degree of polymerization, It is also preferable to employ a method of rapidly cooling directly below the spinneret or a method of increasing the spinning draft, and more preferably a method of combining the rapid cooling method and the high draft method.

The polyester has an intrinsic viscosity [η] of 0.1.
It is preferred to use a polymer of 6 to 1.0. Further, in the cooling method, in order to sharpen the cross-sectional shape, it is preferable to cool the yarn by applying a laminar cooling wind to a position 10 to 40 mm immediately below the spinning nozzle from the circumference or one side. Further, the spinning draft, that is, the ratio between the take-up speed and the polymer discharge linear speed of the spinning hole, is preferably about 500 to 2000, which is about 5 to 10 times as large as the spinning draft employed in ordinary melt spinning. Specifically, the intrinsic viscosity [η] of the polyester is set to 0.65, the yarn is quenched at a speed of 0.5 m / sec at a speed of 0.5 m / sec by laminar cooling air at a position 20 mm immediately below the spinning nozzle, and a take-up speed of 2,000 m / min. Then, a method of spinning with a spinning draft of about 700 is given as an example.

The cooled multifilament may be once drawn as an undrawn yarn and then subjected to ordinary drawing, or may be continuously drawn without being wound, that is, by employing a spin draw method. Is also good. Preferably,
The spun undrawn yarn is stretched about 1.5 to 2.5 times continuously without being wound once to form a multifilament. The polyester multifilament may be used after being subjected to false twisting or fluid jetting within a range that does not impair the object of the invention. When used in a woven fabric, it may be left untwisted or twisted as long as the object of the present invention is not impaired. When twisting is applied, it is preferable to be about 300 T / m or less. Further, the fiber may be mixed with other multifilaments as long as the object of the present invention is not impaired.
However, when used for the warp of a woven fabric, it is preferable that the polyester multifilament is not subjected to any processing other than giving a twist of 300 T / m or less and is used alone from the viewpoint of the expression of “brick-stacked form”.

The high-density polyester fabric of the present invention is woven using at least the polyester multifilament as a warp, and the warp and the weft of the fabric have a CF of 2000.
To 3000, more preferably 2200 to 3000. CF is 600mmH ₂ O or more water pressure resistance can not be obtained, also the yarn deviation in the tissue better motion of the fabric according to brickwork embodiment described above (misalignment) is likely to occur in less than 2000. In order to obtain a high water pressure resistance of 1000 mmH ₂ O or more, it is preferably 2200 or more. 3
If it exceeds 000, the texture of the fabric becomes hard, the softness decreases, and the tear strength also decreases. Although the above-mentioned polyester multifilament can obtain the effect even if it is used only for the warp of the woven fabric, the more excellent effect can be obtained if it is used for both the warp and weft. When used for wefts, it is preferable to use a polyester multifilament that has been subjected to false twisting or the like in view of the water resistance and softness of the obtained woven fabric.
The fabric structure is not particularly limited, but a relatively high-density structure such as taffeta / satin / calze is preferred.

The polyester high-density woven fabric of the present invention can be produced by using a known loom.
(Air jet loom) or WJL (water jet loom) is most preferable in terms of cost. The warp tension during weaving is preferably 0.1 to 0.4 g / d, more preferably 0.2 to 0.3 g / d. The rotation speed of the loom is preferably 300 to 1000 rpm, and more preferably 400 to 700 rpm.

The polyester high-density woven fabric of the present invention can be subjected to hydrophilic processing, if necessary. For the hydrophilic treatment, a commercially available hydrophilic treatment agent can be used. For example, it is preferable to treat the cloth with a 5 to 10% aqueous solution using a polyethylene glycol-based hydrophilic processing agent. If necessary, the surface of the cloth may be subjected to a water-repellent treatment in order to repel water from the outside such as rain. As the water repellent, a generally commercially available water repellent can be used. Specifically, a fluororesin type, a melamine resin type, and other water repellents can be used. Preferred water repellents include Asahi Guard AG-710, a fluorine-based water repellent manufactured by Asahi Glass Co., Ltd.
Preferably, the fabric is treated as a% aqueous solution.

[0019]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. The performance of the woven fabric was evaluated by the following method. (1) Water resistance Pressure was measured by a water resistance test method (hydrostatic method) based on JIS-L-1092. In the present invention, the value that satisfies the water pressure resistance is 600 mmH ₂ O or more, and 1000 mmH ₂ O
The above was evaluated as a level of high water pressure resistance. (2) B-value softness Mechanical property test method (KES) for evaluating texture of fabric in a test room under standard conditions (temperature ± 2 ° C., relative humidity 65 ± 2%)
Method B) was used as a value indicating the softness. The test machine used was a pure bending tester (KES-FB2 Kato Tech). The B value is the bending elasticity per unit length (g ·
cm / cm) was represented by an average value in the meridian direction and the weft direction. In the present invention, the B value softness value satisfying the softness value is 0.070 or less. (3) Noiselessness Performed by a sensory evaluation method in a test room in a standard state (temperature ± 2 ° C., relative humidity 65 ± 2%), and three judges determined the loudness of the sound produced by rubbing the fabrics with each other. ○, △ and × 4
It was evaluated by rank. ◎ is a slight sound without discomfort, ○ is a weak sound with little discomfort, △ is a middle sound with discomfort, × is a sound with discomfort, and ◎ and ○ satisfy the noiselessness of the present invention.レ ベ ル and × were determined to be levels that did not satisfy the noiseless properties of the present invention.

Examples 1 to 8 and Comparative Examples 1 to 6 AJL (ZA209 manufactured by Tsuda Koma Co.) using W-shaped cross-sectional polyester filaments of warp and weft shown in Table 1.
In accordance with the CF standard shown in Table 1 with a flat structure. Asahigard AG-710 (manufactured by Meisei Chemical Co., Ltd.) having a density of 6
%, Isopropyl alcohol 2%, Sumitex Resin N-3, 0.2% aqueous emulsion (water repellent)
Dipped inside and squeezed with mangle. This processed fabric was subjected to a heat treatment in a dryer at 110 ° C. × 2 minutes, and further at 175 ° C. × 1 minute. The performance of the obtained fabric was evaluated, and the results are shown in Table 1.

In the table, H represents the flatness, and the flatness H
Is 3.5, the opening angle of the single yarn is 125 degrees, and the flatness H is 1.
The opening angle of 0 was 57 degrees. The flatness and opening angle are measured by embedding the filament in paraffin, cutting out a section of the filament with a microtome, observing the section with an optical microscope at a magnification of 200 times, taking a photograph of the filament cross section, and stretching it to 3 times. did. As described above, for the degree of flatness, a rectangle circumscribing the W-shaped cross section of the filament was drawn, and a value obtained by dividing the long side L of this rectangle by the short side H was used. W
Lead lines were drawn from both ends of the lower concave portion of the letter-shaped cross section, the angles were measured with a protractor, and five points were each measured and expressed as an average value. The symbol TX in the table is a processed yarn processed by a false twisting machine (manufactured by Teijin Limited, Tetron Woolley, Type F).
0210).

[0022]

[Table 1]

From Table 1, it can be seen that the high-density polyester woven fabric of the present invention using at least a polyester filament having a certain fineness in the yarn fineness, single yarn fineness, cross-sectional flatness of single yarn and CF value in the warp (Examples 1 to 8). Has excellent water pressure resistance, softness and noiselessness. In particular, Examples 1 to 5 show excellent high water pressure resistance, softness and noiselessness. On the other hand, when a single yarn having a small flatness was used for the warp (Comparative Examples 1 to 5)
3) Even if a processed yarn or a single yarn having a large flatness is used as the weft, the water resistance, the softness, and the noiselessness cannot be simultaneously satisfied. When the CF value of the woven fabric is small, softness and noiselessness can be obtained.
A water pressure of 0 mmH ₂ O or more could not be obtained (Comparative Example 6). Further, when the CF value is too large, the water pressure resistance is good, but the softness and the noiselessness are not obtained (Comparative Example 4), and the same applies when the processed yarn is used as the weft (Comparative Example 5).

[0024]

According to the polyester high-density woven fabric of the present invention, it is possible to improve the water pressure resistance without excessively designing the high-density woven fabric by using at least the "bricked form" of each single yarn of the multifilament used for the warp. Not only can be obtained, but also it is possible to avoid a decrease in tear strength or a coarse hardness due to a high density, and further, a soft texture and noiselessness can be exhibited. Accordingly, the polyester high-density woven fabric of the present invention is particularly useful for sports clothing such as windbreakers and ski wear.

[Brief description of the drawings]

FIG. 1 is a photomicrograph of a warp cross section of a polyester high-density woven fabric which is an example of the present invention.

[Explanation of symbols]

 1 ... warp (brick pile structure), 2 ... weft, 3 ... single yarn.

Claims (1)

[Claims] A woven fabric using a polyester multifilament having a flatness of a cross section of a single yarn of 2 to 4 and a single yarn fineness of 0.5 to 2 d and a yarn fineness of 30 to 90 d at least for a warp, A polyester high-density woven fabric having a total cover factor of the history of the woven fabric of 2,000 to 3,000.