JP2004052191A - Woven fabric having low air permeability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woven fabric having low air permeability, soft feeling and high sweat absorption and abrasion resistance. <P>SOLUTION: The woven fabric is produced by using a multifilament (A) having a filament cross-section holding two or more constricted parts and having a flatness of 2-6 as the warp or the weft. The cover factor (CF) of the fabric is 1,500-3,500. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a low-permeability woven fabric having excellent sweat absorption and abrasion resistance without impairing a soft texture.
[0002]
[Prior art]
BACKGROUND ART Conventionally, many low-permeability fabrics have been proposed in fields such as sports clothing and uniforms. As such low-permeability woven fabrics, there are known high-density woven fabrics using synthetic fibers such as polyester and polyamide, woven fabric surfaces coated with a resin or the like, and further calendered ones. ing.
[0003]
However, these high-density woven fabrics and those obtained by subjecting the woven fabric surface to a coating process or a calendering process usually have a hard texture and a low strength (abrasion resistance) against abrasion of the woven fabric surface, and improvement thereof is required. .
[0004]
On the other hand, woven fabrics made of synthetic fibers have a drawback that they are inferior in sweat absorption as compared with knitted fabrics made of natural fibers such as cotton.
[0005]
As a method for imparting such sweat-absorbing properties to synthetic fibers, it is known to apply a water-absorbing treatment to the woven fabric using a hydrophilic agent. However, depending on the application, even better sweat-absorbing properties have been desired.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a low-permeability woven fabric having a soft feel, sweat absorption, and abrasion resistance.
[0007]
[Means for Solving the Problems]
The present inventor has proposed that a multifilament, which is a flat cross-section yarn having a specific constricted portion, constitutes a woven fabric as a warp and / or a weft, so that the multifilament is dense and wide due to the contact pressure at the fabric structure point. It becomes a spread aggregate, and the voids formed by the warp and the weft can be reduced, and as a result, a woven fabric having excellent softness and low air permeability can be obtained. It has been found that the fabric has excellent sweat-absorbing properties, and furthermore, the unevenness of the filament surface due to the constricted portion reduces the frictional resistance of the woven fabric surface and has excellent abrasion resistance. The present invention has been completed by further intensive studies.
[0008]
Thus, according to the present invention, "a multifilament (A) having a flat cross section having a flatness of 2 to 6 having a cross section of two or more constrictions at a cross section of two or more filaments, and a woven fabric comprising a warp or a weft; Thus, a low-permeability woven fabric having a sweat-absorbing property and a soft feel, characterized in that the cover factor (CF) is 1500 to 3500, is provided.
[0009]
At that time, it is preferable that the multifilament (A) is non-twisted, because more excellent low air permeability can be obtained. Such low air permeability is preferably 5 cc / cm ² · sec or less in air permeability. Moreover, it is preferable that it is 40 mm or more as a sweat-absorbing property. Further, the wear resistance is preferably 50 times or more.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
First, the multifilament (A) constituting the warp or the weft of the low-permeability woven fabric of the present invention has a cross-sectional shape (cross-sectional shape) perpendicular to the fiber axis in two or more places (preferably three to five places). ) Having a constriction of 2 to 6 (preferably 3 to 5) in cross section.
[0011]
Here, the section flatness is a ratio (B / C) of the length (B) of the long side and the length (C) of the short side in the cross section of the filament. If the cross-sectional flatness is smaller than 2, the bending rigidity of the filament increases, so that a soft hand cannot be obtained, which is not preferable. At the same time, when the cross-sectional flatness is smaller than 2, the multifilaments (A) in the woven fabric are less likely to form a wide-spread aggregated form, the voids formed by the warp and the weft become large, and It is not preferable because low air permeability cannot be obtained. On the other hand, when the cross-sectional flatness exceeds 6, the spinning property becomes difficult, which is not preferable.
[0012]
Next, the constricted portion is a portion where the length (C) of the short side is shortened, as schematically shown in FIG. In such a constricted portion, the depth of the concave portion is 1.05 or more (preferably 1.1 or more) in a ratio of the maximum value and the minimum value of the length (C) of the short side (maximum of C / minimum of C). The depth is preferably such that Although FIG. 1 illustrates an example in which the concave portion is formed on both side portions, the concave portion may be formed only on one side portion. It is necessary that the number of the constricted portions is two or more. If the number of constricted portions is one or less, a sufficient capillary phenomenon does not act on the constricted portions, and a satisfactory sweat-absorbing property cannot be obtained. If the constriction is one or less at the same time, unevenness on the filament surface is insufficient, and satisfactory wear resistance cannot be obtained, which is not preferable. The number of the constricted portions is not particularly limited as long as it is two or more, but three to five portions are appropriate in consideration of the spinning property. FIG. 1 illustrates a case where there are three constricted portions.
[0013]
The fiber type of the multifilament (A) is not particularly limited, and may be a known fiber such as a synthetic fiber, a semi-synthetic fiber, and a natural fiber. Among them, synthetic fibers are particularly preferred.
[0014]
Such synthetic fibers are not particularly limited, but synthetic fibers such as polyester, polyamide, polyvinylidene chloride, and polypropylene represented by polyethylene terephthalate and polytrimethylene terephthalate can be used. Of these, synthetic fibers such as polyester, polyamide, polyvinylidene chloride, and polypropylene obtained by melt spinning are preferred because of ease of production.
[0015]
If necessary, the multifilament (A) may have a matting agent, a fine pore forming agent, a cationic dyeing agent, a coloring inhibitor, a heat stabilizer, a flame retardant, a fluorescent brightener, a coloring agent, an antistatic agent. One, two or more agents, hygroscopic agents, antibacterial agents, inorganic fine particles and the like may be added.
[0016]
The fiber form of the multifilament (A) is not particularly limited, and may be a long fiber or a short fiber. Among them, non-twisted or sweet-twisted long fibers are preferably exemplified in order to reduce the voids formed by the warp and the weft. In particular, a non-twisted long fiber is particularly preferable.
[0017]
The multifilament (A) may be subjected to air processing such as false twist crimping processing, Taslan processing or interlace processing.
[0018]
The total fineness and single yarn fineness of the multifilament (A) are not particularly limited, but in terms of texture, the total fineness is 30 to 170 dtex (more preferably 50 to 100 dtex), and the single yarn fineness is 0.5 to 5 dtex (more Preferably, a range of 1 to 4 dtex) is appropriate.
[0019]
In the low air permeability woven fabric of the present invention, the warp or the weft is composed of the multifilament (A). Here, the warp and the weft may be constituted by the multifilament (A), or one of the warp and the weft is constituted by the multifilament (A), and the other yarn is a functional yarn such as an antistatic yarn. May be used. When the warp or the weft is composed of the multifilament (A), a small amount of the warp or the weft may be mixed with other yarns as long as the object of the present invention is not impaired.
[0020]
Next, in the woven fabric of the present invention, the cover factor (CF) needs to be 1500 to 3500 (preferably 1500 to 3000, particularly preferably 1500 to 2500).
[0021]
Here, the cover factor (CF) is expressed.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
However, DWp is the warp total fineness (dtex), MWp is the warp weave density (line / 2.54 cm), DWf is the weft total fineness (dtex), and MWf is the weft weave density (line / 2.54 cm).
[0022]
If the CF is smaller than 1500, voids formed by the warp and the weft become large, and it is not preferable because sufficient low air permeability cannot be obtained. Conversely, if the CF is larger than 3500, the softness of the texture is undesirably reduced.
[0023]
In the low air permeability woven fabric of the present invention, the woven structure is not particularly limited, and a known woven structure such as a flat structure, a twill structure, and a satin structure can be used. Among them, a flat structure is most preferable for obtaining excellent low air permeability.
[0024]
The low-permeability woven fabric of the present invention can be woven by a usual weaving method using the multifilament (A) for the warp and / or the weft. Further, an alkali weight reduction process or a dyeing finish process of a usual method may be performed. Furthermore, various processes for imparting functions such as ultraviolet absorption or antistatic agent, antibacterial agent, deodorant, insect repellent, luminous agent, retroreflective agent, etc. May be additionally applied.
[0025]
Low air permeability fabrics of the present invention obtained in this way, as such a low air permeability, it is preferable that 5cc ^/ cm 2 · sec or less air permeability (more preferably 2cc ^/ cm 2 · sec or less) . Further, the sweat absorption is preferably 40 mm or more (more preferably, 50 mm or more). Further, the wear resistance is preferably 50 times or more (more preferably 80 times or more, particularly preferably 100 times or more).
[0026]
Such a low-permeability fabric can be easily obtained by using the above-mentioned multifilament (A) for the warp and / or the weft and appropriately selecting the value of CF within the above-mentioned range.
[0027]
In the low-permeability woven fabric of the present invention, since the cross-sectional shape of the filament constituting the multifilament (A) is flat, the multifilament (A) is dense and wide in the woven fabric due to the contact pressure of the woven fabric points. It has a structure that spreads out. As a result, the space formed by the warp and the weft becomes small, and ventilation can be prevented, so that excellent low air permeability can be obtained.
[0028]
At the same time, as a result of the multifilament (A) having a widespread structure, the bending stiffness is reduced and a soft texture can be obtained. At that time, at the fabric design point, the constricted portion (concave portion) hardly comes into contact with the other yarn, the friction between the warp and the weft is reduced, and a softer texture can be obtained than that having a flat flat shape. .
[0029]
Further, the surface frictional resistance of the woven fabric is reduced due to the unevenness of the filament surface, and excellent wear resistance is obtained.
[0030]
Furthermore, since moisture is diffused into the constricted portion of the filament by the capillary phenomenon, excellent sweat absorption is obtained.
[0031]
As described above, the low-permeability woven fabric of the present invention has a soft texture, sweat absorption, and abrasion resistance, so that it can be used for sports clothing, uniforms, men, women, inners, linings, and other clothing, hats, umbrellas, and the like. It is suitable for various clothing-related products such as textile products and folk costumes such as toves.
[0032]
【Example】
Next, Examples and Comparative Examples of the present invention will be described in detail, but the present invention is not limited by these. In addition, each measurement item in an Example was measured by the following method.
<Air permeability> Measured according to JIS 1096 (Fragile method).
<Abrasion resistance> Measured according to JIS 1096 (flat wear method).
<Sweating properties> Measured according to JIS 1096 (Bilec method).
<Hand feeling> The softness was evaluated by handling, and a five-level evaluation was performed: soft, slightly soft, ordinary, slightly hard, and hard.
<Comprehensive evaluation> Very excellent was evaluated as ◎, excellent was evaluated as ○, slightly poor was evaluated as Δ, and poor was evaluated as ×.
[0033]
[Example 1]
Polyethylene terephthalate is spun at a spinning temperature of 300 ° C from a die perforated in four mountain flat cross sections (three constrictions), taken up at 4000 m / min, stretched 1.3 times continuously without winding, and filament As shown in FIG. 1, a multifilament (A) having a flat cross section (cross section flatness 3.2) having three constricted portions (maximum / minimum length C of the short side = 1.2) as shown in FIG. ) 84dtex / 30fil was obtained.
[0034]
Next, the multifilament (A) was used without twisting, with a weft of 100%, to obtain a plain fabric by a conventional weaving method. Then, a low-permeability woven fabric with a cover factor of 1782 was obtained by dyeing in a conventional manner.
[0035]
The low-permeability fabric had an overall evaluation of 汗 with a sweat absorption of 55 mm, a permeability of 0.74 cc / cm ² · sec, a soft feel, and a wear resistance of 110 times.
[0036]
[Example 2]
Example 1 was implemented except that the cross-sectional shape of the filament was changed to a flat cross-section (cross-sectional flatness 3.2) having two constricted portions (maximum / minimum length C of the short side = 1.2) of two constricted portions. A low-permeability fabric was obtained in the same manner as in Example 1.
[0037]
The low-permeability fabric had a sweat absorption of 50 mm, a permeability of 0.93 cc / cm ² · sec, a soft feel, and an abrasion resistance of 82 times.
[0038]
[Comparative Example 1]
A low-permeability woven fabric was obtained in the same manner as in Example 1 except that the cross-sectional shape of the filament was changed to a flat flat cross-section without a constriction (a cross-sectional flatness of 3.2).
[0039]
The permeation-resistant cloth had a sweat absorption of 20 mm, an air permeability of 2.75 cc / cm ² · sec, a slightly soft feel, and a wear resistance of 56 times.
[0040]
[Comparative Example 2]
A low-permeability woven fabric was obtained in the same manner as in Example 1 except that the cross-sectional shape of the filament was changed to a round cross-section.
[0041]
The permeation-resistant cloth had a sweat absorption of 22 mm, an air permeability of 5.55 cc / cm ² · sec, a slightly hard feel, and abrasion resistance of 45 times.
[0042]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the low-permeability textiles which have soft feeling, a sweat-absorbing property, and abrasion resistance are provided. Such a low-permeability woven fabric is suitable for applications requiring low air permeability, such as sports clothing and uniforms.
[Brief description of the drawings]
FIG. 1 schematically illustrates a flat cross-sectional shape having a constricted portion according to the present invention.
[Explanation of symbols]
1 Constriction

Claims (6)

A multifilament (A) whose cross-sectional shape is a flat cross-section having a flatness of 2 to 6 having two or more constricted portions, and a woven fabric comprising a warp or a weft, wherein a cover factor (CF) is A low-permeability fabric having a molecular weight of 1500 to 3500. The low-permeability fabric according to claim 1, wherein the multifilament (A) is untwisted. The low air permeability woven fabric according to claim 1 or ² , wherein the air permeability is 5 cc / cm ² · sec or less. The low-permeability woven fabric according to any one of claims 1 to 3, which has a sweat absorption of 40 mm or more. The low-permeability fabric according to any one of claims 1 to 4, wherein the abrasion resistance is 50 times or more. A clothing-related product comprising the low-permeability fabric according to any one of claims 1 to 5.

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