WO2004009889A1

WO2004009889A1 - Flat multifilament-yarn textile

Info

Publication number: WO2004009889A1
Application number: PCT/JP2003/009277
Authority: WO
Inventors: Shuji Minato; Motohiro Kitagawa; Ryo Tohdo
Original assignee: Teijin Fibers Limited
Priority date: 2002-07-24
Filing date: 2003-07-22
Publication date: 2004-01-29
Also published as: EP1524343A4; CA2461551A1; CN1585841B; TW200402488A; TWI329147B; CA2461551C; US20050176323A1; EP1524343B1; EP1524343A1; CN1585841A

Abstract

Flat multifilament-yarn textile having excellent characteristics of low air permeability, show-through prevention capability and/or water/sweat-absorbing capability is textile including multifilament yarns each of which is formed of plural artificial filaments as the warp and weft and has a flat cross-sectional shape. On both sides of the longitudinal centerline in the flat cross section, at least more than three swollen portions per one side, outwardly swollen from the longitudinal centerline, and more than two constricted portions per one side, formed between the swollen portions, are formed substantially symmetrical with respect to the longitudinal centerline. A cross-sectional flatness expressed by a ratio (B/C1) of a length (B) in the longitudinal centerline to a maximum width (C1) in the direction perpendicular to the centerline direction is within a range from 2 to 6 and has a cover factor of 800 to 3,500 as the textile as a whole.

Description

Description: Flat multifilament yarn fabric

Technical field

The present invention relates to a flat multifilament yarn woven fabric. More specifically, the present invention relates to a multifilament composed of a plurality of artificial single filaments having a flat cross-sectional shape, a force, and two or more constrictions on one side of the cross-sectional shape. Including thread

The present invention relates to a woven fabric having a soft feel and practically high water absorption, abrasion strength, and anti-see-through properties. Background art

Many low-permeability textiles have been proposed in the fields of sports clothing and uniforms. Examples of such low-permeability fabrics include high-density fabrics using synthetic fibers such as polyester-polyamide, fabrics that have been coated with a resin or the like on the fabric surface, and fabrics that have been subjected to force rendering. It has been known.

However, these high-density woven fabrics and woven fabrics that have been subjected to coating and calendering usually have a hard texture and low strength (abrasion resistance) against abrasion of the woven fabric surface. Had been taken.

Synthetic fibers such as polyester / polyamide are widely used in clothing and industrial applications due to their excellent physical and chemical properties. In particular, polyester fibers have many excellent features such as strength, dimensional stability, and easy care. For this reason, many woven fabrics using synthetic fibers such as polyester have been proposed for a wide range of applications. However, woven fabrics made of synthetic fibers such as polyester have the above-mentioned excellent properties, but generally have high transparency, and when they are used for clothing, clothing worn under them, such as underwear, can be seen through. The disadvantage is that it can be seen.

As a means for solving the above-mentioned problems of the synthetic fiber fabric, kneading inorganic fine particles such as titanium oxide into synthetic fibers is known. By this means, the opacity or the see-through prevention of the fiber itself is improved, but in order to prevent the transmission of light through the gap formed between the warp and the weft, the density of the fabric is increased. In such a case, there is a problem that the flexibility of the obtained fabric is reduced.

In addition, curtains and other textiles used in the interior field need to have both high anti-see-through properties (the property that no movement of objects or people in the room can be seen from the outside) and high light-transmitting and light-transmitting properties. However, it is generally very difficult to reconcile these two characteristics.

For this reason, usually thick drape curtains are placed on the indoor side, thin lace curtains are placed on the window side, and the thick drape curtains are closed at night, and in order to obtain both anti-transparency and daylighting during the day. It is common practice to keep light lace curtains closed. However, in general, thick drape curtains have good see-through prevention but poor lighting, while thin race curtains do not have sufficient see-through prevention not only at night but also during the day. The improvement was desired.

In order to solve this problem, for example, it is obtained by interweaving a polyester fiber containing an anti-glazing agent such as titanium oxide and a black-dyed polyester fiber so that light can be reflected and absorbed. Shading curtain (for example, Japanese Patent No. 3167586), or on one or both sides of the fabric When the shiny surface is illuminated by light, the scattered light hinders the see-through from outside to inside, but impairs lighting and ventilation. There are proposals for mirror curtains (for example, Japanese Patent Application Laid-Open No. 2000-237035) that do not produce noise, and for shielding light by laminating a black light-shielding layer on the surface of the fabric (for example, Japanese Utility Model Application Laid-Open No. 62-113787). Have been.

However, in the case where the black light-shielding layer is laminated on the surface of the fabric and the above-mentioned light-shielding power is one, there is a problem that the room becomes dark and a heavy atmosphere due to poor lighting. In addition, the mirror curtain has a problem that although it has high daylighting property, it has insufficient antireflection property, especially at night, and has a glittering luster due to a bright yarn.

Therefore, there has not yet been provided a practical woven material that has excellent anti-reflective properties without impairing the lighting property.

In addition, the fabric made of synthetic fibers has a disadvantage that it is inferior in water absorbency, especially sweat absorbency, to fabrics made of natural fibers such as cotton. As a means, it is known that a fabric is subjected to a water absorbing process using a water-repellent agent, but applications requiring even more excellent water absorbing and sweat absorbing properties, such as lining, sports clothing, and There are uniform clothing.

Therefore, there is a strong demand for artificial fiber woven fabrics, particularly synthetic fiber woven fabrics, which have a soft feeling, high anti-transparency properties, and excellent water and sweat absorption properties. Disclosure of the invention

An object of the present invention is to have a feeling of high flexibility, water absorption and sweat absorption, An object of the present invention is to provide a flat multifilament yarn woven fabric having a high abrasion strength, a moderate air permeability and a light transmissivity, and a high transparency preventing property.

Furthermore, the present invention is useful for the construction of a fiber material having an appropriate air permeability, a fiber material having a high anti-seepage property, a fiber material having a high water absorbing property and a sweat absorbing property, and / or a fiber material having a high abrasion strength. The aim is to provide a flat multi-filament yarn fabric.

The above object can be achieved by the flat multifilament yarn woven fabric of the present invention.

The flat multifilament yarn woven fabric of the present invention contains a fiber-forming artificial polymer as a main component, and comprises a multifilament yarn composed of a plurality of artificial filaments having a flat cross-sectional shape, which is formed by warp and / or weft. A woven fabric containing as a yarn,

In the flat cross section of the artificial filament, on each side of the longitudinal center line, at least three bulging portions per side bulging outward from the longitudinal center line, and between these bulging portions The formed two or more constrictions per one surface are formed substantially symmetrically with respect to the longitudinal center line, and are perpendicular to the longitudinal direction of the maximum longitudinal length (B) of the irregular cross section. The cross-sectional flatness expressed by the ratio (B / C1) to the maximum width (C1) in the crossing direction is in the range of 2 to 6,

It is characterized by having a force par factor of 800-3500 as the whole woven fabric.

In the flat multifilament yarn woven fabric of the present invention, it is preferable that the fiber-forming artificial polymer is selected from polyester, polyamide, polyvinylidene chloride, polypropylene, regenerated cellulose, and cellulose acetate.

In the flat multifilament yarn woven fabric according to the present invention, the minimum value of the maximum value (C1) of the width in the flat cross section of the artificial filament. The ratio (C1ZC2) to (C2) is preferably 1.05 to 4.00. In the flat multifilament yarn woven fabric of the present invention, the total fineness of the multifilament yarn is 30 to: L70dtex, and the single filament is The fineness is preferably 0.5 to 5 dtex.

In the flat multifilament yarn woven fabric of the present invention, the woven fabric preferably has a woven structure selected from a plain woven structure, a twill woven structure, and a satin woven structure.

In the flat multifilament yarn woven fabric of the present invention, the content of the multifilament yarn having the flat cross-sectional shape contained in the woven fabric is preferably 10 to: L00 mass%.

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the force factor value is in the range of 1500 to 3500.

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, it is preferable that the multifilament yarn (A) has a burning number of 0 to 2500 TZm.

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the air permeability of the woven fabric measured by JIS L 1096-1998, 6.27.1, Method A (Fragile-type testing machine method) is measured. , 5 mlZcm ² · sec or less.

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the air permeability is preferably in the range of 0.1 to 4. Oml / cm ² · sec.

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the water absorption rate of the woven fabric is measured by JIS L 1096-1998, 6.26.1, (2) B method (Piret method). However, it is preferable that it is 40 mm or more. In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the abrasion strength of the woven fabric measured by JIS L 1096-1998, 6.17.1, (1) A_1 method (planar method) is reduced. It is preferable that the number is 50 times or more. The low-permeability fiber material of the present invention includes the flat multifilament filament woven fabric according to the embodiment (1) ′ of the present invention.

In the aspect (2) of the flat multifilament yarn woven fabric of the present invention, the multifilament yarn contains 0.2% by mass or more of the matting agent, and the woven fabric has a cover factor in the range of 1300 to 3000. . In the aspect (2) of the flat multifilament yarn woven fabric of the present invention, the multifilament yarn preferably has a twist number of 0 to: LSOOTZm.

In the aspect (2) of the flat multifilament yarn woven fabric of the present invention, in the JIS Z 8729-1994, the L * value when placed on a white plate in the L * a * b * color system. The difference between (L) and the L * value (L * _b ) when placed on a black plate is less than or equal to 15 as shown by L (= L * _ff — L * _b ). Is preferred.

In the aspect (2) of the flat multifilament yarn woven fabric of the present invention, the water absorption rate of the woven fabric measured by the JIS L 1096-1998, 6.26.1, (2) B method (Pilet method) However, it is preferable that it is 40 mm or more.

The anti-see-through / sweat-absorbing fiber material of the present invention includes the flat multifilament yarn woven fabric according to the aspect (2) of the present invention.

In the aspect (3) of the flat multifilament yarn woven fabric of the present invention, the multifilament yarn contains 0 to 0.2% by mass of the matting agent, and the power factor of the woven fabric is in the range of 800 to 2000. .

In the aspect (3) of the flat multifilament yarn woven fabric of the present invention, the multifilament yarn has a twist number of 0 to 1000 Zm. Is preferred.

In the aspect (3) of the flat multifilament yarn woven fabric of the present invention, the light transmission of the woven fabric measured by the JISL 1055-1987, 6.1, A method (where illuminance is 100,000 lx). Preferably the rate is between 10 and 70%. The see-through preventing fiber material of the present invention contains the flat multifilament yarn woven fabric of the embodiment (3) of the present invention. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory diagram showing an example of a cross-sectional shape of a flat multifilament yarn woven fabric used in the flat multifilament yarn woven fabric of the present invention. FIG. 2 is used for the flat multifilament yarn woven fabric of the present invention. FIG. 3 is an explanatory diagram showing another example of the cross-sectional shape of the flat multifilament. FIG. 3 is an explanatory diagram showing another example of the cross-sectional shape of the flat multifilament used in the flat multifilament yarn fabric of the present invention. . BEST MODE FOR CARRYING OUT THE INVENTION

The inventors of the present invention provide a woven fabric comprising, as a warp and / or a weft, a multifilament made of a fiber-forming artificial polymer and having a plurality of filaments having a flat cross-sectional shape. 3 or more, preferably 4 or more, more preferably 4 to 6 bulges whose flat cross-sectional shape bulges out on both sides of the longitudinal center line in a direction outward from the longitudinal center line. Part, and two or more, preferably three or more, more preferably three to five, constricted parts formed between these bulging parts and facing the longitudinal center line. And the flat section of the birment is The cross-sectional flatness expressed by the ratio (BZ C1) of the maximum length (B) of the shape to the maximum value C1 in the direction crossing at right angles to this length direction is 2 to 6 In the obtained woven fabric, (1) the single filaments in the flat multifilament yarn are densely arranged on mutually flat surfaces due to the tissue contact pressure at the intersection of the warp and weft. While wearing, it slides and spreads to form a wide and dense thread portion, and in this portion, the voids formed between the flat single filaments are reduced, and (2) The surface of the flat filament is roughened by a plurality of bulges and a plurality of constrictions, so the frictional resistance between the filaments is low, and therefore, the intersection of the flat multifilament warp and weft Has high flexibility (bending ) Has been found to have even lower air permeability deer.

Further, the inventors of the present invention believe that the plurality of constrictions formed on the flat surface of the flat multifilament develop a capillary phenomenon with respect to a liquid, and therefore the fabric of the present invention is exposed to water and sweat. On the other hand, it was found that they exhibited excellent water absorption and sweat absorption properties.

Further, the inventors of the present invention have proposed that the plurality of bulges and constrictions formed on the peripheral surface of the flat multifilament reduce the frictional resistance of the peripheral surface of the flat multifilament as described above. As a result, it has been found that the woven fabric of the present invention has excellent wear strength.

Furthermore, the inventors of the present invention consider that the flat surface formed by a plurality of bulges and constrictions on the peripheral surface of the flat multifilament used in the woven fabric of the present invention has the following characteristics. The transmitted light is scattered by reflection and refraction, thereby reducing the transparency without significantly reducing the light collection (transmission amount), and preventing the inside of the fabric from being seen through from the outside. I found that I could.

Further, the inventor of the present invention provides the flat multifilament yarn of the present invention. By appropriately setting the cover factor of the strip fabric within the range of 800 to 3500, the flat multifilament yarn of the present invention can have air permeability, water absorption and sweat absorption, abrasion strength, see-through prevention properties, and the like. Has been found to be able to be appropriately adjusted, and thereby it is possible to provide a clothing material having these characteristics.

The present invention has been completed based on the above findings.

The flat multifilament yarn woven fabric of the present invention comprises a multifilament yarn comprising a plurality of artificial filaments having a flat cross-sectional shape, which contains a fiber-forming artificial polymer as a produced component, and comprises a warp yarn and a Z or weft yarn. It is a woven fabric to be included.

In the above-mentioned flat multifilament yarn, for example, as shown in FIG. 1, the shape of the cross section 1 of the single filament is perpendicular to its longitudinal center line with respect to its length. It has a relatively short width, that is, a flat shape. In cross section 1 shown in Fig. 1, three or more (four in Fig. 1) bulges per side protruding outward from the longitudinal center line on both sides of its longitudinal center line 2 3 and two or more (three in FIG. 1) constrictions 4 per side formed between the bulges 3 are formed symmetrically with respect to the longitudinal center line. In the cross section of FIG. 1, the cross-sectional flatness represented by the ratio (BZ C1) of the maximum length (B) in the longitudinal direction to the maximum width (C1) in the direction perpendicular to the longitudinal center direction is It is in the range of 2-6.

In the cross-sectional shape of each flat single filament, three or more bulging portions and two or more constrictions formed on one surface of the flat cross-sectional shape are opposite to the one surface of the flat cross-sectional shape. With respect to three or more bulging portions and two or more constricting portions formed on the surface, the shapes and arrangement positions thereof are almost symmetrical with respect to the longitudinal center line of the flat cross-sectional shape. I have. In the cross section of the flat single filament of the multifilament, the number of bulges is 3 or more per side as described above, preferably 4 or more, and more preferably 4 to 6 as described above. is there. As described above, the number of constricted portions is two or more per side, preferably three or more, and more preferably three to five. Further, the cross-sectional flatness is 2 to 6, as described above, and preferably 3 to 5.

If the number of bulges is 2 or less per side, and if the number of constrictions is 1 or less per side, the frictional resistance on the periphery of the filament increases, and multifilament However, the spread due to pressure welding at the intersection at the intersection of the courses is insufficient, it is difficult to control the resulting air permeability, the wear strength is insufficient, and the decrease in the constriction on the periphery of the filament is obtained. The resulting fabric has insufficient water absorption and sweat absorption properties, and further has an insufficient light scattering effect on the periphery of the filament, resulting in an insufficient transparency preventing effect of the obtained fabric.

In the flat multifilament yarn woven fabric of the present invention, the cross-sectional flatness (B / C1) of the flat multifilament yarn in the cross section of a single filament is 2 to 6, as described above, and preferably 3 to 5. is there . If the cross-sectional flatness is less than 2, the filament and the bending resistance (rigidity) are increased, and the obtained woven fabric becomes insufficient in flexibility, so that a desired soft feeling cannot be obtained.

Further, if the cross-sectional flatness is less than 2, the spread of the multifilament in the woven fabric, particularly by press-welding at the weft intersection, becomes insufficient, and the gap between the weft yarns cannot be sufficiently reduced. However, since the size of the voids between the fibers cannot be made sufficiently small, it becomes difficult to control the air permeability of the obtained woven fabric to a desired value.

In addition, it is difficult to manufacture a multifilament having a cross-sectional flatness (B_ / C1) of more than 6. In the cross-sectional shape of the flat single filament of the flat multifilament yarn used in the woven fabric of the present invention, the ratio of the maximum width (C1) in the direction orthogonal to the longitudinal center line to the minimum value (C2) ( C1 / C2) is preferably from 1.05 to 4.00, more preferably from 1.10 to 2.50. The above ratio (C1Z C2) is a parameter related to the depth of the constriction of the flat single filament. When the ratio (C1 / C2) is less than 1.05, that is, the depth of the constriction When the depth is shallow, the frictional resistance of the flat single filament surface is high, so that the resulting fabric may have high air permeability, and may have insufficient abrasion strength and insufficient see-through prevention. However, sweat absorption may be insufficient. If the ratio (C1Z C2) exceeds 4.0, the depth of the narrow portion of the flat single filament becomes too large, and the effect of the flatness is saturated. The spinning process is unstable, and the obtained single filament may be easily torn along the constricted portion, and the uniformity of the cross-sectional shape of the single filament may be reduced. FIGS. 2 and 3 each show another example of the cross-sectional shape of the flat single filament used for the flat multifilament yarn fabric of the present invention.

The cross section of the filament 1 shown in FIG. 2 has the same shape as the cross section shown in FIG. 1 on both sides of the longitudinal center line 2, but the cross section of the bulging portion 3 is elliptical. It is gentle like an arc along the long axis, so the constriction 4 is shallow.

The cross section of the filament 1 shown in FIG. 3 has four bulges and three constrictions on one side on both sides of its longitudinal center line. The piece 3a is narrower in width and height than the other bulge, so the depth from the top of the bulge 3a to the valley bottom of the constriction 4a on both sides is the other constriction. It is shallower than the four parts. The force factor of the flat multifilament yarn woven fabric of the present invention is as follows.

As described above, it is 800 to 3500, and can be appropriately set according to the characteristics and performance required of the woven fabric.

The force factor (CF) of a woven fabric is defined by the following equation.

CF = (DWp / 1.1) ^1/2 XMWp + (DWf / 1.1) ^1/2 XMWf

However, in the above formula,

DWp represents the total fineness (dtex) of the warp,

MWp represents the warp weaving density (this Z2.54cm),

D f represents the total fineness (dtex) of the weft,

M f represents the weaving density of the weft (this Z2.54cm).

When the force factor (CF) of the flat multi-filament yarn fabric of the present invention is less than 800, the voids formed between the warp and the weft become large, and the air permeability of the obtained fabric is adjusted to a desired value. It becomes difficult to control and it is difficult to obtain high see-through prevention. If the force-per-factor (CF) exceeds 3500, the obtained woven fabric becomes insufficient in flexibility, and the (adopted light) transmittance becomes insufficient.

The fiber-forming artificial polymer used for forming the flat multifilament of the flat multifilament yarn woven fabric of the present invention is a fiber-forming synthetic polymer such as polyester, polyamide, polyvinylidene chloride, and the like. And fiber-forming semi-synthetic polymers such as cellulose acetate; and regenerated polymers such as regenerated cellulose. Considering the difficulty of flat multifilament manufacturing processes, fiber-forming thermoplastic polymers, such as polyesters (eg, polyethylene terephthalate and trimethylene terephthalate), which can be produced by melt spinning, are considered. ), Polyamide (For example, nylon 6, nylon 66, etc.), polyvinylidene chloride, polypropylene and the like.

If necessary, the fiber-forming artificial polymer may include an anti-glazing agent (for example, titanium dioxide, etc.), a fine pore-forming agent (for example, a metal salt of organic sulfonic acid, etc.), a cationic dye dyeing agent (for example, Isophthal Acid sulfonium salts, etc.), antioxidants (eg, hindered phenol compounds, etc.), heat stabilizers, flame retardants (eg, diantimony trioxide), fluorescent brighteners, coloring agents, antistatic agents (eg, sulfonic acid metal salts) Etc.), one or more of a moisture absorbent (eg, polyoxyalkylene alcohol) and an antibacterial agent may be added as additives.

The total fineness of the multifilament yarns used in the woven fabric of the present invention and the latitude of the flat single multifilament are not particularly limited as long as the target woven fabric of the present invention can be obtained. , 30 to: 170 dt ex, more preferably 50 to: LOO dt ex, and the single filament fineness is preferably 0.5 to 5 dt ex, more preferably 1 to 5 dt ex. ~ 4 dt ex.

In the flat multifilament yarn used in the flat multifilament yarn woven fabric of the present invention, the number of twists is not particularly limited as long as the target woven fabric is obtained, and depends on the use and required characteristics of the target woven fabric. In general, it is preferably 0 to 2500 T / m, and more preferably 0 to 600 TZm.

The multifilament yarn used for the woven fabric of the present invention has been subjected to air crimping such as false twist crimping, Taslan crimping, and interlacing as long as the target fabric of the present invention is obtained. May

In the woven fabric of the present invention, the warp and / or the weft constituting the woven fabric are formed of a plurality of single filaments having the flat cross-sectional shape. It is composed of filament yarn. That is, both the warp and the weft may be constituted by the flat multifilament yarn, or only one of the warp and the weft is constituted by the flat multifilament yarn. The other one may be composed of a yarn different from the flat multifilament yarn. The heterogeneous yarn may be any of a monofilament yarn, a multifilament yarn and a spun yarn, and these have a special function, for example, an antistatic property, a glittering property, and the like. Is also good. Further, in the warp and / or weft used for the woven fabric of the present invention, a small amount of different kinds of fibers different from the flat multifilament are used together with the flat multifilament yarn as long as the target woven fabric of the present invention is obtained. , May be mixed. In the flat multifilament yarn fabric of the present invention, the content of the flat multifilament is preferably from 10 to 100% by mass, more preferably from 20 to 100% by mass, based on the total mass of the woven fabric. 100% by mass is, preferably in the al 40-100 mass ^_0/0.

The flat multifilament for a fabric according to the present invention is a spinneret for flat filaments, for example, a plurality of dischargers having a cross-sectional shape described in JP-A-56-107044, page 5, FIG. It can be manufactured using a spinneret having an outlet.

The flat multifilament yarn woven fabric of the present invention can be manufactured by a normal weaving method using the flat multifilament yarn manufactured as described above as a warp and / or a weft. It can be dyed and finished in the usual way. When the flat multifilament yarn is a polyester yarn, the woven fabric can be subjected to a weight reduction treatment. Further, in the finishing process, a water-absorbing enhancement treatment (for example, a treatment for applying or impregnating a water-absorbing agent such as an anion-based hydrophilic polymer compound), a water-repelling treatment (for example, a water-repelling agent such as a fluorine compound) At least one of the following treatments: coating or impregnating), ultraviolet shielding treatment (for example, dispersion method of metal oxide ultrafine particles), antistatic treatment, deodorant treatment, insect repellent treatment, and phosphorescent treatment. , May be applied sequentially

In the aspect (1) of the flat multifilament yarn woven fabric of the present invention, the fineness of the warp and the warp / weft density are controlled such that the force factor (CF) of the woven fabric is in the range of 1500 to 3500. Rolled. In the embodiment (1) of the present invention, the preferable force factor (CF) of the woven fabric is 1500 3000, and more preferably 1500 2500. In the aspect (1) of the present invention, the number of twists of the flat multifilament yarn is preferably 02,500 TZm, more preferably 0 600 TZm, and further preferably 0 TZm. That is, it is untwisted.

The flat multifilament yarn woven fabric of the embodiment (1) of the present invention preferably has a low air permeability of 5 ml / cm ² , sec or less, more preferably 4 ml / cm ² · sec or less. More preferably, it is 0.13 ml / cm ² .sec. This air permeability is measured by the JIS L 1096-1998 6.27.1 A method (Fragile type testing machine method).

In the aspect (1) of the present invention, the flat multifilament yarn woven fabric has a water absorption rate measured by JIS L 1096-1998 6.26.1 (2) B method (Pireck method), It is preferably 40 or more, more preferably 50 70 mm, and the wear strength measured by the JIS L 1096-1998 6.17.1 (1) A- It is preferably at least 50 times, more preferably at least 80 times, even more preferably at least 100 times.

In the embodiment (1) of the present invention, if the cover factor (CF) of the woven fabric is less than 1500, the area of the gap formed by the warp and the weft yarns And the resulting fabric may have excessively high air permeability (for example, more than 5 ml / cm ² -sec), and may have insufficient water absorption / perspiration and abrasion strength. If the force factor (CF) exceeds 3500, the warp and the weft are in close contact with each other, resulting in insufficient flexibility of the obtained woven fabric and increased bending resistance, resulting in a poor feeling of the woven fabric. In addition, the wear strength may be insufficient.

In the flat multifilament yarn woven fabric according to the aspect (1) of the present invention, which has a force par factor (CF) of 1500 to 3500, the flat multifilament yarn constituting the warp and the knit or the weft is formed by a weft Due to the contact pressure at the intersection, the single filaments that are in contact with each other slide on each other at their contact surfaces, and the yarn is flattened and spreads laterally, reducing the area of the yarn gap and reducing the woven fabric. The air permeability decreases. For this reason, the flat multifilament yarn woven fabric of the embodiment (1) of the present invention preferably has a low air permeability of 5 ml / cm ² .sec or less.

Further, in the aspect (1) of the present invention, the flattening of the yarn lowers the bending resistance of the obtained woven fabric, improves its flexibility, and shows a soft feeling. In addition, on the single filament peripheral surface of the flat multifilament yarn of the present invention, three or more bulges per one surface extending along the longitudinal direction and two or more constrictions formed between the bulges are provided. The peripheral surface of the filament is roughened, and even if the single filaments are in contact with each other, especially when they are pressed against each other at the intersection of the warp and weft, the contact area between the single filaments is increased. It is small, so the surface frictional resistance is small, which contributes to the improvement of the flexibility of the fabric. Furthermore, on the periphery of the single filament, the constricted portion extending along the longitudinal direction of the single filament does not become blocked even if the single filaments are in contact with each other. Since the sweat is easily diffused by the capillary action of the constriction, the obtained woven fabric exhibits excellent water absorption and sweat absorption. The flat multifilament yarn woven fabric according to the above aspect (1) of the present invention has a feeling excellent in flexibility, high water absorption / perspiration, and abrasion strength. It is useful as a low-breathable fiber material for sports clothing for boys and girls, folk costumes such as uniforms and toves, underwear, lining, hats and umbrellas.

In the aspect (2) of the flat multifilament yarn woven fabric of the present invention, the multifilament yarn is 0.2% by mass or more, preferably 0.4 to 3.5% by mass. /. And more preferably ^{1.0 to} 2.5 mass ⁰ /. And the cover factor (CF) of the fabric is in the range of 1300 to 3000, preferably 1400 to 2500.

The composition and type of the matting agent contained in the multifilament of the flat multifilament yarn woven fabric of the embodiment (2) of the present invention are not particularly limited as long as the desired woven fabric can be obtained. Inorganic fine particles composed of one or more kinds such as parium sulfate can be used. If the content of the anti-glare agent is less than 0.2 mass relative to the mass of the multifilament, the light reflectance of the obtained multifilament yarn becomes insufficient, and the obtained woven fabric has a sufficient In some cases, it may not be possible to exhibit a high degree of fluoroscopy prevention. However, if the content of the antiglare agent exceeds 7% by mass, the systemability of the obtained polymer composition may be unstable.

When the cover factor (CF) of the woven fabric of the embodiment (2) of the present invention is less than 1300, the gap formed between the warp and the weft becomes large, and the see-through preventing property of the obtained woven fabric becomes insufficient. If the cover factor (CF) exceeds 3,000, the woven fabric obtained may have insufficient flexibility and the texture may be unsatisfactory.

In the woven fabric according to the embodiment (2) of the present invention, when the woven structure has a plain woven structure, the force factor (CF) of the woven fabric is preferably in the range of 1400 to 1800, and more preferably 1500 to 1700. It is. , Further, when the woven structure of the woven fabric of the embodiment (2) of the present invention has a twill woven structure, the force factor (CF) of the woven fabric is preferably in the range of 1900 to 2400, and more preferably. 2000-2300.

There is no particular limitation on the number of twists of the multifilament yarn used for the fabric of the embodiment (2) of the present invention as long as the desired fabric is obtained. However, in order to ensure a sufficient degree of freedom with respect to the relative displacement between the single filaments in the yarn, the number of twists of the flat multifilament yarn is preferably 0 to 1500 TZm. And more preferably 0 to 600 T / m. More preferably, the number of twists is OT / m, that is, no twist.

Regarding the flat multifilament yarn woven fabric of the embodiment (2) of the present invention, the degree of see-through prevention is determined according to JIS Z 8729-1994, L * a * b * color system, and the test sample is placed on a white plate. When placed on a black plate, the difference between its L * value (denoted by L) and its L * value (denoted by L) is represented by ΔL (= L%-L \) In this case, the degree of prevention of fluoroscopy is preferably A L15 or less, more preferably 13.5 or less, and further preferably 10 to 13. When the degree of see-through prevention ΔL is higher than 15, the see-through preventing property of the woven fabric may be insufficient for practical use.

In the flat multifilament yarn woven fabric according to the embodiment (2) of the present invention, the water absorption of this woven fabric measured by the JIS L 1096-1998, 6.26.1, (2) B method (Pilet method) The speed is preferably 40 mm or more, preferably 45 mm or more, and more preferably 50 to 70 mm.

If the water absorption speed is less than 40 mm, the water absorption and sweat absorption of the fabric may be insufficient for practical use.

In the flat multifilament yarn woven fabric of the embodiment (2) of the present invention, the cross-sectional shape of a single filament constituting the multifilament yarn is as follows. Since it is flat and has three or more bulges on one side and two or more constrictions formed between them, the mutual friction resistance of the single filaments that are in contact with each other is small. Because of the slipperiness, when pressure is applied to the multifilament yarn, the single filament is easily displaced at the contact surface, the yarn spreads flatly, and the single filament spreads that flat. In a plane, they can be in close contact with each other and have a small gap between the yarns, so that the amount of light transmission can be reduced.

In addition, since this single filament contains 0.2% by mass or more of the matting agent, it is possible to reduce the light transmittance of the obtained woven fabric and diffusely reflect the light beam projected toward the woven fabric.

Furthermore, the plurality of bulges and constrictions formed on the flat peripheral surface of the single filament can roughen the flat peripheral surface, scatter light, and prevent see-through. The flattening and spreading of the flat multifilament yarn at the intersection of the warp and weft of the woven fabric can soften the intersection and soften the texture of the woven fabric. In addition, the constriction extending in the longitudinal axis direction of the peripheral surface of the single filament can exhibit a high water absorption rate and a high water absorption rate by exhibiting a capillary phenomenon against water or sweat. .

Therefore, the flat multifilament yarn woven fabric according to the aspect (2) of the present invention is a fiber material used for applications requiring high antireflection property and sweat-absorbing property, for example, a fiber for lining, sports clothing, uniform clothing and the like. It is useful as a material.

In the aspect (3) of the flat multifilament yarn woven fabric of the present invention, the artificial filament of the multifilament yarn contains 0 to 0.2% by mass of the matting agent, and the cover factor (CF ) Is in the range of 800 to 2000.

In the flat multifilament yarn woven fabric according to the embodiment (3) of the present invention, However, the content of the anti-glare agent contained in the artificial filament is as described above.

It is preferably from 0 to 0.2% by mass, more preferably from 0 to 0.1% by mass, and even more preferably not containing an antiglare agent (0% by mass). The antiglare agent can be selected from conventional antiglare agents such as titanium dioxide and barium sulfate. If the content of the anti-glare agent exceeds 0.2% by mass, in the preferred use of the fabric of the embodiment (3) of the present invention, for example, in a curtain, the light transmittance becomes insufficient, and therefore, the lighting property is unsatisfactory. It may be something like that.

In the flat multifilament yarn woven fabric according to the embodiment (3), the number of twists of the flat multifilament yarn is preferably from 0 to 1000 T / m, more preferably from 0 to 200 TZm and no twist. (0T / m) is more preferable.

As described above, the force factor (CF) of the flat multifilament yarn woven fabric of the embodiment (3) of the present invention is 800 to 2000, preferably 900 to 1800, and more preferably 1000 to 1800. Is more preferred.

When the force factor (CF) is less than 800, the gap between the warp and the weft becomes large in a preferable use of the flat multifilament yarn woven fabric of the embodiment (3) of the present invention, for example, in a curtain, and the obtained woven fabric The method for preventing see-through is insufficient. If it exceeds 2000, the lighting may be insufficient.

The light transmittance of the flat multifilament yarn woven fabric of the embodiment (3) of the present invention measured by JIS L 1055-1987, 6.1, A method (illuminance is 100, OOOlx) is 10 to It is preferably 70%, more preferably 20 to 50%. The light transmittance (%) can be calculated by subtracting the light blocking ratio (%) of the woven fabric from 100 (%). When the light transmittance is less than 10%, the preferred use of the obtained fabric is

For example, in curtains, lighting may be insufficient. If the light transmittance exceeds 70%, the resulting fabric may not be sufficiently transparent.

The flat multifilament yarn woven fabric of the embodiment (3) of the present invention is preferably dyed and finished to be colorless (white) or light to medium color. The type and amount of dye used for dyeing may be appropriately selected according to the use of the obtained fabric and the required performance.

In the aspect (3) of the present invention, in the flat multifilament yarn woven fabric, the flat multifilament yarn is flattened by the contact pressure at the intersection of the warp and the weft, and the single filament is woven. The laminations are close to each other on the deviated plane, forming a dense structure. Therefore, the gap between the warp and the weft is reduced, and the amount of light transmitted through the gap is reduced. In addition, a small amount of light transmitted through the gap causes diffraction in the gap, and adjacent transmitted lights interfere with each other to improve the effect of preventing see-through. Also, due to the special cross-sectional shape of the flat single filament, compared to the flat cross-section filament, the circular cross-section filament, and the triangular cross-section filament having the same fineness, the filament circumference Irregular reflection of light and refraction of light transmitted through the filament increase, and thus the obtained woven fabric can exhibit an excellent effect of preventing see-through without reducing the amount of collected light.

Further, the flat multifilament yarn woven fabric of the embodiment (3) of the present invention also has a soft feeling, low bending resistance and air permeability, as well as high abrasion strength and water absorption / perspiration, similarly to the other embodiments. It shows the nature.

Based on the above characteristics, the flat multifilament yarn woven fabric of the embodiment (3) of the present invention is useful as an anti-transparent fiber material for intellectuals such as curtains, roll blinds, and partitions. is there. Example The present invention is further described by the following examples. However, these examples do not limit the scope of the present invention.

Example 1

Polyethylene terephthalate resin was pierced into a spinneret and 30 melt spinning holes with a shape corresponding to the filament cross-sectional shape shown in Fig. 1 (4 circles per side on both sides of the longitudinal center line) (With an arc-shaped bulge and three constrictions formed between them) at a spinning temperature of 300 ° C. The extruded filamentary melt stream is taken off at a take-off speed of 4000 mZ while cooling and solidifying, and the obtained unstretched multifilament is immediately taken up at a temperature of 97 ° C without winding up. In this example, the film was drawn at a draw ratio of 1.3 to prepare a drawn multifilament yarn having a yarn count force S of 84 dtex / 30 filaments. This stretched multifilament has a cross-sectional shape as shown in Fig. 1, its cross-sectional flatness is 3.2, and the value of the ratio C1 / C2 in the filament cross-sectional width is 1. Was 2.

The flat multifilament yarn is used as a warp and a weft while being untwisted.

Warp density: 101 yarns / 2.54 cm

Weft density: 90 yarns / 2.54cm

Was manufactured. The content of the flat multifilament yarn of this plain fabric was 100%. This plain fabric was scoured and dyed. The finished plain weave had a force perforator (CF) of 1782.

The finished flat woven fabric was subjected to the following test.

(1) Air permeability

The air permeability of the test fabric was measured according to JISL 1096-1998, 6.27.1, Method A (Frazil-type testing machine method). (2) Wear strength

The wear strength of the test fabric was measured by the JIS L 1096-1998, 6.17.1, (1) A-1 method (plane method).

(3) Water absorption

The water absorption rate of the test fabric was measured by JIS L 1096-1998, 6.26.1, (2) B method (Pyrek method).

(4) Texture

Based on the tactile sensation of the hand, the following five levels were used for evaluation.

Class 5 Extremely high flexibility and excellent texture.

Class 4 High flexibility and excellent texture.

Class 3 The flexibility is good and the feeling is good.

Level 2 The flexibility is somewhat insufficient, and the feeling is somewhat unsatisfactory.

Class 1 Poor flexibility and poor feeling.

(5) Overall evaluation

The following four levels were evaluated.

Grade 4 Excellent.

Class 3 Excellent.

Level 2 Somewhat unsatisfactory

Grade 1 bad

Table 1 shows the evaluation results.

Example 2

In the same manner as in Example 1, a flat multifilament yarn flat woven fabric was manufactured and tested. However, in the cross-sectional shape of the flat filament, the number of arc-shaped bulges per side was set to three, the number of constrictions was set to two, and the flatness of the cross-section (BZC1) was 3.2 with respect to the longitudinal center line. / C2 is set to 1.2. The force per factor (CF) of the obtained plain fabric was 1782. Table 1 shows the test results. Comparative Example 1

In the same manner as in Example 1, a flat multifilament yarn flat woven fabric was manufactured and tested. However, the cross-sectional shape of the flat filament has no constriction. (Section flatness = 3.2, ratio Cl / C2 = 1.0). The resulting strength factor of the plain weave was 1782.

Comparative Example 2

A multifilament yarn flat woven fabric was manufactured and tested in the same manner as in Example 1. However, the cross-sectional shape of the filament was changed to a circle. The strength factor (CF) of the obtained plain fabric was 1782. Table 1 shows the test results.

table 1

Example 3

A polyethylene terephthalate resin containing 2.5% by mass of titanium dioxide was used as an anti-glare agent. 30 pieces of this resin were punched into the spinneret and had a shape corresponding to the filament cross-sectional shape shown in Fig. 1. At a spinning temperature of 300 ° C. through a melt spinning hole (having four arc-shaped bulges on each side and three constrictions formed therebetween) on both sides of the longitudinal center line. Do not cool and solidify the extruded The undrawn multifilament was drawn at a drawing speed of 97 m / min and immediately stretched at a temperature of 97 ° C at a draw ratio of 1.3 without winding, and the yarn count was 84 dtex / 30 filament. The drawn multifilament yarn of the fiber was prepared. This drawn multifilament had a cross-sectional shape as shown in FIG. 1, the cross-sectional flatness was 3.2, and the value of the ratio C1 / C2 in the cross-sectional width of the filament was 1.2.

The multifilament yarn is used as a warp and a weft while being untwisted.

Warp density: 101 2.54cm

Weft density: 84 yarns / 2.54cm

Was manufactured. The content of the flat multifilament yarn of this plain fabric was 100%. This plain fabric was scoured and dyed. The finished plain weave had a force factor (CF) of 1700. '

The above woven fabric was subjected to the following test.

(1) Degree of fluoroscopy prevention

JIS Z 8729-1994, L * a * b * color system, L * value when the test sample was placed on a white plate (L * _w ) and it was placed on a black plate L * value (L * _b hereinafter) the difference between the time _{(= L% - L * b} ) the determined, with this, showing the perspective prevention of the test test weaving thereof.

(2) Water absorption

As in Example 1, the water absorption rate of the test fabric was measured by JIS L 1096-1998, 6.26.1, (2) B method (Pyrex method).

(3) Texture

In the same manner as in Example 1, evaluation was made based on the tactile sensation of the hands in the following five categories. Class 5 Extremely high flexibility and excellent texture.

Class 4 High flexibility and excellent texture.

Class 3 The flexibility is good and the feeling is good.

Level 2 The flexibility is somewhat insufficient, and the feeling is somewhat unsatisfactory. Class 1 Poor flexibility and poor feeling.

(4) Overall evaluation

As in Example 1, evaluation was made in four steps as follows.

Grade 4 Excellent.

Class 3 Excellent.

Level 2 Somewhat unsatisfactory

Grade 1 bad

Table 2 shows the evaluation results.

Example 4

In the same manner as in Example 3, a flat multifilament yarn flat woven fabric was manufactured and tested. However, in the cross-sectional shape of the flat filament, the number of liquid swelling portions per side was set to 3 and the number of constrictions was set to 2 per side, and the cross-sectional flatness (BZC1) was 3.2, and the ratio was C1ZC2. Was changed to 1.2. The force per factor (CF) of the obtained plain fabric was 1,700. Table 2 shows the test results.

Comparative Example 3

In the same manner as in Example 3, a flat multifilament yarn flat woven fabric was manufactured and tested. On the other hand, the cross-sectional shape of the flat filament has no constriction. (Section flatness = 3.2, ratio C1ZC2 1.0). The cover factor of the obtained plain fabric was 1,700. Table 2 shows the test results.

Comparative Example 4

A multi-filament yarn flat woven fabric was manufactured in the same manner as in Example 3. The test was performed. However, the cross-sectional shape of the filament was changed to a circle.

. The cover factor (CF) of the obtained plain fabric was 1,700. Table 2 shows the test results.

Table 2

Example 5

Thirty melt spinning holes (longitudinal) made of a polyethylene terephthalate resin (not containing an anti-glare agent) were punched into the spinneret and had a shape corresponding to the filament cross-sectional shape shown in Fig. 1. (Four arc-shaped bulges per side, and three constrictions formed between them) on both sides of the center line) at a spinning temperature of 300 ° C. While cooling and solidifying the extruded filamentary melt stream, it is drawn at a take-up speed of 4000 m / min, and the obtained undrawn multifilament is drawn immediately at a temperature of 97 ° C without winding up. The drawn multifilament yarn having a yarn count of 84 dt exZ 30 filament was drawn at a magnification of 1.3. This drawn multifilament has a cross-sectional shape as shown in Fig. 1, its cross-sectional flatness is 3.2, and the value of the ratio C1Z C2 in the filament cross-sectional width is 1.2. Was.

The multifilament yarn is used as warp and weft without twisting. Using

Warp density: 63 yarns / 2.54cm

Weft density: 52 yarns / 2.54 cm

Was manufactured. The content of the flat multifilament yarn of this plain fabric was 100%. This plain fabric was scoured and dyed. The finished plain weave had a force factor (CF) of 1,000.

The flat multifilament plain woven fabric was subjected to the following test.

(1) Light transmittance

The test fabric was subjected to the light-shielding rate (%) measurement according to JI SL 1055-1987, 6.1, Method A (I, illuminance: 100, 0OOlx), and from the obtained light-shielding rate (%), the following formula was used. The light transmittance (%) was calculated from the equation.

Light transmittance (%) = 100 — Light blocking rate (%)

(2) Anti-transparency

Daytime perspective prevention

An object to be seen through (color: red, shape: rectangular parallelepiped, dimensions: 15cm x 7cm x 7cm) is placed 20cm away from one surface of the test sample in a room with an illuminance of 700 lx using an 80W fluorescent lamp for indoor use. Position, and place the eye of the article observer in an outdoor location (daylight, illuminance 100,000 lx) 30 cm away from the other surface of the fabric to be tested. The following four levels were used to evaluate the degree of daytime visibility of the article when the article was seen through a woven fabric.

Class 4 The product cannot be recognized at all.

Class 3 Goods can be recognized slightly.

Class 2 The outline of the article can be almost recognized.

First-class goods can be clearly recognized.

Night fluoroscopy prevention The nighttime perspective prevention was tested in the same manner as the daytime perspective prevention test method. However, the article viewer was located outside the room at night (illuminance: 0.2 lx).

Table 3 shows the results of a test in which the degree of nighttime fluoroscopy prevention was evaluated in four stages, as in the case of daytime.

Example 6

In the same manner as in Example 5, a flat multifilament yarn flat woven fabric was manufactured and tested.

However, the weaving structure of the plain woven fabric was changed to a warp density: 55 strands Z2.54 cm and a weft density: 36 strands Z2.54 cm. Therefore, its cover factor (CF) was changed to 880.

Table 3 shows the test results.

Example 7

The weaving structure of the plain woven fabric was changed to a warp density: 112 / 2.54 cm, a weft density: 74 / 2.54 cm, and the force factor (CF) was changed to 1800.

Table 3 shows the test results.

Example 8

However, the flat multifilament yarn was twisted at a twist of 200 TZm. The power factor of the obtained plain fabric was 1000. Table 3 shows the test results.

Comparative Example 5 In the same manner as in Example 5, a flat multifilament yarn flat woven fabric was manufactured and tested. However, the cross-sectional shape of the flat filament has no constriction. (Section flatness = 3.2, ratio C1Z C2 = 1.0). The obtained plain fabric had a power perfume doctor of 1,000. Table 3 shows the test results.

Comparative Example 6

In the same manner as in Example 5, a multifilament yarn flat woven fabric was manufactured and tested. However, the cross-sectional shape of the multifilament was changed to a triangle. The resulting fabric had a power factor of 1,000. Table 3 shows the test results.

Comparative Example 7

A multifilament yarn flat woven fabric was manufactured and tested in the same manner as in Example 5. However, the cross-sectional shape of the filament was changed to a circle. The cover factor (CF) of the obtained plain fabric was 1,000. Table 3 shows the test results.

Comparative Example 8

In the same manner as in Example 6, a multifilament yarn flat woven fabric was manufactured and tested. However, the cross-sectional shape of the multifilament was changed to a triangle. The resulting plain weave had a power factor (CF) of 880. Table 3 shows the test results.

Comparative Example 9

In the same manner as in Example 7, a multifilament yarn flat woven fabric was manufactured and tested. However, the cross-sectional shape of the multifilament was changed to a triangle. The cover factor (CF) of the obtained plain fabric was 1,800. Table 3 shows the test results.

Industrial applicability

In the flat multifilament yarn woven fabric of the present invention, the slippage between the single filaments is good due to the special cross-sectional shape of the single filament, and the contact pressure at the intersection between the warp and the weft is good. Since the multifilament yarns are flattened and spread, and the gaps between the yarns are reduced, the air permeability can be appropriately controlled, and the obtained fabric has high abrasion strength, and water absorption and sweat absorption. It is excellent in light transmittance, and can diffract and diffuse the incident light without remarkably lowering the light transmittance, thereby lowering the transparency. Therefore, the flat multifilament yarn woven fabric of the present invention is useful as a low-permeability fiber material, a see-through preventing fiber material, a water-absorbing / sweat-absorbing fiber material, and a light-collecting / see-through preventing fiber material. .

Claims

Range of request

1. A woven fabric comprising a multifilament yarn comprising a plurality of artificial filaments having a flat cross-sectional shape as a warp and a knot or a weft, containing a fiber-forming artificial polymer as a main component,

In the flat cross section of the artificial filament, both blue lines of the longitudinal center line

On the side, there are three or more bulges per side bulging outwardly of the longitudinal center line, and two or more constrictions per side formed between these bulges, It is formed substantially symmetrically with respect to the longitudinal center line, and the ratio (BZ C1) of the length (B) of the irregular cross section to the maximum width (C1) in the direction perpendicular to the longitudinal center line direction ) Is in the range of 2 to 6,

A flat multi-filament yarn woven fabric having a force par factor of 800 to 3500 as the whole woven fabric.

2. The flat multi-filament yarn according to claim 1, wherein the fiber-forming artificial polymer is selected from polyester, polyamide, polyvinylidene chloride, polypropylene, regenerated cellulose, and cellulose acetate. fabric.

3. The ratio (C1 / C2) of the maximum value (C1) of the width of the artificial filament to the minimum value (C2) in the flat section of the artificial filament is 1.05 to 4.00. 2. The flat multifilament yarn woven fabric according to item 1.

4. The flat multifilament according to claim 1, wherein the total fineness of the multifilament yarn is 30 to: L70 dtex, and the single filament fineness is 0.5 to 5 dtex. Thread fabric.

5. The flat multifilament yarn woven fabric according to claim 1, wherein the woven fabric has a woven structure selected from a plain woven structure, a twill woven structure, and a satin woven structure.

6. The content of the consisting artificial Firame cement having a flat sectional shape Maruchifi lame cement yarns included in the fabric, 10; 100 mass ^_0/0, flat according to claim 1 Maruchifi Laminate yarn fabric.

7. The flat multifilament yarn fabric of claim 1, wherein said force per factor value is in the range of 1500-3500.

8. The Maruchifi lame down bets yarn has a twist number 0~2500T ^/ / m, flat Maruchifi Lament yarn woven product according to claim 7.

9. The air permeability of the woven fabric measured by JIS L 1096-1998, 6.27.1, Method A (Fragile type testing machine method) is 5 mlZcm ² · sec or less. 9. The flat multifilament yarn woven fabric according to the above item.

10. The flat multifilament yarn woven fabric according to claim 9, wherein the air permeability is in a range of 0.1 to 4.0 mlZcm ² · sec.

11. The flat mulch according to claim 7, wherein the woven fabric has a water absorption rate measured by JIS L 1096-1998, 6.26.1, (2) B method (Pyrec method) of 40 mm or more. Filament yarn fabric.

12. The woven fabric according to claim 7, wherein the abrasion strength of the woven fabric measured by JIS L 1096-1998, 6.17.1, (1) A-1 method (flat surface method) is 50 times or more. 2. The flat multifilament yarn woven fabric according to claim 1.

13. A low-permeability fiber material comprising the flat multi-filament yarn woven fabric according to any one of claims 7 to 12.

14. The artificial filament of the multifilament yarn contains 0.2% by mass or more of a matting agent, and the woven fabric has a force perfatator in a range of 1300 to 3000. Flat filament yarn fabric.

15. The multifilament yarn has a twist of 0 ~: 1500TZm. 15. The flat multifilament yarn woven fabric according to claim 14,

16. In the JIS Z 8729-1994, L * a * b * color system, the L * value (L) when the fabric is placed on a white plate and the L when the fabric is placed on a black plate 15. The flat multi-filament yarn according to claim 14, wherein the degree of prevention of see-through represented by a difference (= L%-L \) from the value (L * _b ) is 15 or less. fabric.

17. The woven fabric according to claim 14, wherein a water absorption rate of the woven fabric measured by JIS L 1096-1998, 6.26.1, (2) B method (Pyrec method) is 40 mm or more. Flat multifilament yarn fabric.

18. A see-through preventing / sweat-absorbing fiber material, comprising the flat multifilament yarn woven fabric according to any one of claims 17 to 17.

19. The multifilament yarn of claim 1 wherein the artificial filament comprises 0-0.2% by weight of the matting agent and the woven fabric has a force factor in the range of 800-200000. 2. The flat multifilament yarn woven fabric according to claim 1.

20. The flat multifilament yarn woven fabric according to claim 19, wherein the multifilament yarn has a burning number of 0 to 1000 T / m.

21. The fabric according to claim 19, wherein the woven fabric has a light transmittance of 10 to 70% as measured by JIS L 1055-1987, 6.1, Method A (伹, illuminance is 100,000 lx). Flat multifilament yarn fabric.

22. A see-through preventing fiber material, comprising the flat multifilament yarn woven fabric according to any one of claims 19 to 21.